caseEditor/public/kankan-sdk-deps.js

/**
 * Tween.js - Licensed under the MIT license
 * https://github.com/sole/tween.js
 * ----------------------------------------------
 *
 * See https://github.com/sole/tween.js/graphs/contributors for the full list of contributors.
 * Thank you all, you're awesome!
 */

// Date.now shim for (ahem) Internet Explo(d|r)er
if ( Date.now === undefined ) {

	Date.now = function () {

		return new Date().valueOf();

	};

}

var TWEEN = TWEEN || ( function () {

	var _tweens = [];

	return {

		REVISION: '14',

		getAll: function () {

			return _tweens;

		},

		removeAll: function () {

			_tweens = [];

		},

		add: function ( tween ) {

			_tweens.push( tween );

		},

		remove: function ( tween ) {

			var i = _tweens.indexOf( tween );

			if ( i !== -1 ) {

				_tweens.splice( i, 1 );

			}

		},

		update: function ( time ) {

			if ( _tweens.length === 0 ) return false;

			var i = 0;

			time = time !== undefined ? time : ( typeof window !== 'undefined' && window.performance !== undefined && window.performance.now !== undefined ? window.performance.now() : Date.now() );

			while ( i < _tweens.length ) {

				if ( _tweens[ i ].update( time ) ) {

					i++;

				} else {

					_tweens.splice( i, 1 );

				}

			}

			return true;

		}
	};

} )();

TWEEN.Tween = function ( object ) {

	var _object = object;
	var _valuesStart = {};
	var _valuesEnd = {};
	var _valuesStartRepeat = {};
	var _duration = 1000;
	var _repeat = 0;
	var _yoyo = false;
	var _isPlaying = false;
	var _reversed = false;
	var _delayTime = 0;
	var _startTime = null;
	var _easingFunction = TWEEN.Easing.Linear.None;
	var _interpolationFunction = TWEEN.Interpolation.Linear;
	var _chainedTweens = [];
	var _onStartCallback = null;
	var _onStartCallbackFired = false;
	var _onUpdateCallback = null;
	var _onCompleteCallback = null;
	var _onStopCallback = null;

	// Set all starting values present on the target object
	for ( var field in object ) {

		_valuesStart[ field ] = parseFloat(object[field], 10);

	}

	this.to = function ( properties, duration ) {

		if ( duration !== undefined ) {

			_duration = duration;

		}

		_valuesEnd = properties;

		return this;

	};

	this.start = function ( time ) {

		TWEEN.add( this );

		_isPlaying = true;

		_onStartCallbackFired = false;

		_startTime = time !== undefined ? time : ( typeof window !== 'undefined' && window.performance !== undefined && window.performance.now !== undefined ? window.performance.now() : Date.now() );
		_startTime += _delayTime;

		for ( var property in _valuesEnd ) {

			// check if an Array was provided as property value
			if ( _valuesEnd[ property ] instanceof Array ) {

				if ( _valuesEnd[ property ].length === 0 ) {

					continue;

				}

				// create a local copy of the Array with the start value at the front
				_valuesEnd[ property ] = [ _object[ property ] ].concat( _valuesEnd[ property ] );

			}

			_valuesStart[ property ] = _object[ property ];

			if( ( _valuesStart[ property ] instanceof Array ) === false ) {
				_valuesStart[ property ] *= 1.0; // Ensures we're using numbers, not strings
			}

			_valuesStartRepeat[ property ] = _valuesStart[ property ] || 0;

		}

		return this;

	};

	this.stop = function () {

		if ( !_isPlaying ) {
			return this;
		}

		TWEEN.remove( this );
		_isPlaying = false;

		if ( _onStopCallback !== null ) {

			_onStopCallback.call( _object );

		}

		this.stopChainedTweens();
		return this;

	};

	this.stopChainedTweens = function () {

		for ( var i = 0, numChainedTweens = _chainedTweens.length; i < numChainedTweens; i++ ) {

			_chainedTweens[ i ].stop();

		}

	};

	this.delay = function ( amount ) {

		_delayTime = amount;
		return this;

	};

	this.repeat = function ( times ) {

		_repeat = times;
		return this;

	};

	this.yoyo = function( yoyo ) {

		_yoyo = yoyo;
		return this;

	};


	this.easing = function ( easing ) {

		_easingFunction = easing;
		return this;

	};

	this.interpolation = function ( interpolation ) {

		_interpolationFunction = interpolation;
		return this;

	};

	this.chain = function () {

		_chainedTweens = arguments;
		return this;

	};

	this.onStart = function ( callback ) {

		_onStartCallback = callback;
		return this;

	};

	this.onUpdate = function ( callback ) {

		_onUpdateCallback = callback;
		return this;

	};

	this.onComplete = function ( callback ) {

		_onCompleteCallback = callback;
		return this;

	};

	this.onStop = function ( callback ) {

		_onStopCallback = callback;
		return this;

	};

	this.update = function ( time ) {

		var property;

		if ( time < _startTime ) {

			return true;

		}

		if ( _onStartCallbackFired === false ) {

			if ( _onStartCallback !== null ) {

				_onStartCallback.call( _object );

			}

			_onStartCallbackFired = true;

		}

		var elapsed = ( time - _startTime ) / _duration;
		elapsed = elapsed > 1 ? 1 : elapsed;

		var value = _easingFunction( elapsed );

		for ( property in _valuesEnd ) {

			var start = _valuesStart[ property ] || 0;
			var end = _valuesEnd[ property ];

			if ( end instanceof Array ) {

				_object[ property ] = _interpolationFunction( end, value );

			} else {

				// Parses relative end values with start as base (e.g.: +10, -3)
				if ( typeof(end) === "string" ) {
					end = start + parseFloat(end, 10);
				}

				// protect against non numeric properties.
				if ( typeof(end) === "number" ) {
					_object[ property ] = start + ( end - start ) * value;
				}

			}

		}

		if ( _onUpdateCallback !== null ) {

			_onUpdateCallback.call( _object, value );

		}

		if ( elapsed == 1 ) {

			if ( _repeat > 0 ) {

				if( isFinite( _repeat ) ) {
					_repeat--;
				}

				// reassign starting values, restart by making startTime = now
				for( property in _valuesStartRepeat ) {

					if ( typeof( _valuesEnd[ property ] ) === "string" ) {
						_valuesStartRepeat[ property ] = _valuesStartRepeat[ property ] + parseFloat(_valuesEnd[ property ], 10);
					}

					if (_yoyo) {
						var tmp = _valuesStartRepeat[ property ];
						_valuesStartRepeat[ property ] = _valuesEnd[ property ];
						_valuesEnd[ property ] = tmp;
					}

					_valuesStart[ property ] = _valuesStartRepeat[ property ];

				}

				if (_yoyo) {
					_reversed = !_reversed;
				}

				_startTime = time + _delayTime;

				return true;

			} else {

				if ( _onCompleteCallback !== null ) {

					_onCompleteCallback.call( _object );

				}

				for ( var i = 0, numChainedTweens = _chainedTweens.length; i < numChainedTweens; i++ ) {

					_chainedTweens[ i ].start( time );

				}

				return false;

			}

		}

		return true;

	};

};


TWEEN.Easing = {

	Linear: {

		None: function ( k ) {

			return k;

		}

	},

	Quadratic: {

		In: function ( k ) {

			return k * k;

		},

		Out: function ( k ) {

			return k * ( 2 - k );

		},

		InOut: function ( k ) {

			if ( ( k *= 2 ) < 1 ) return 0.5 * k * k;
			return - 0.5 * ( --k * ( k - 2 ) - 1 );

		}

	},

	Cubic: {

		In: function ( k ) {

			return k * k * k;

		},

		Out: function ( k ) {

			return --k * k * k + 1;

		},

		InOut: function ( k ) {

			if ( ( k *= 2 ) < 1 ) return 0.5 * k * k * k;
			return 0.5 * ( ( k -= 2 ) * k * k + 2 );

		}

	},

	Quartic: {

		In: function ( k ) {

			return k * k * k * k;

		},

		Out: function ( k ) {

			return 1 - ( --k * k * k * k );

		},

		InOut: function ( k ) {

			if ( ( k *= 2 ) < 1) return 0.5 * k * k * k * k;
			return - 0.5 * ( ( k -= 2 ) * k * k * k - 2 );

		}

	},

	Quintic: {

		In: function ( k ) {

			return k * k * k * k * k;

		},

		Out: function ( k ) {

			return --k * k * k * k * k + 1;

		},

		InOut: function ( k ) {

			if ( ( k *= 2 ) < 1 ) return 0.5 * k * k * k * k * k;
			return 0.5 * ( ( k -= 2 ) * k * k * k * k + 2 );

		}

	},

	Sinusoidal: {

		In: function ( k ) {

			return 1 - Math.cos( k * Math.PI / 2 );

		},

		Out: function ( k ) {

			return Math.sin( k * Math.PI / 2 );

		},

		InOut: function ( k ) {

			return 0.5 * ( 1 - Math.cos( Math.PI * k ) );

		}

	},

	Exponential: {

		In: function ( k ) {

			return k === 0 ? 0 : Math.pow( 1024, k - 1 );

		},

		Out: function ( k ) {

			return k === 1 ? 1 : 1 - Math.pow( 2, - 10 * k );

		},

		InOut: function ( k ) {

			if ( k === 0 ) return 0;
			if ( k === 1 ) return 1;
			if ( ( k *= 2 ) < 1 ) return 0.5 * Math.pow( 1024, k - 1 );
			return 0.5 * ( - Math.pow( 2, - 10 * ( k - 1 ) ) + 2 );

		}

	},

	Circular: {

		In: function ( k ) {

			return 1 - Math.sqrt( 1 - k * k );

		},

		Out: function ( k ) {

			return Math.sqrt( 1 - ( --k * k ) );

		},

		InOut: function ( k ) {

			if ( ( k *= 2 ) < 1) return - 0.5 * ( Math.sqrt( 1 - k * k) - 1);
			return 0.5 * ( Math.sqrt( 1 - ( k -= 2) * k) + 1);

		}

	},

	Elastic: {

		In: function ( k ) {

			var s, a = 0.1, p = 0.4;
			if ( k === 0 ) return 0;
			if ( k === 1 ) return 1;
			if ( !a || a < 1 ) { a = 1; s = p / 4; }
			else s = p * Math.asin( 1 / a ) / ( 2 * Math.PI );
			return - ( a * Math.pow( 2, 10 * ( k -= 1 ) ) * Math.sin( ( k - s ) * ( 2 * Math.PI ) / p ) );

		},

		Out: function ( k ) {

			var s, a = 0.1, p = 0.4;
			if ( k === 0 ) return 0;
			if ( k === 1 ) return 1;
			if ( !a || a < 1 ) { a = 1; s = p / 4; }
			else s = p * Math.asin( 1 / a ) / ( 2 * Math.PI );
			return ( a * Math.pow( 2, - 10 * k) * Math.sin( ( k - s ) * ( 2 * Math.PI ) / p ) + 1 );

		},

		InOut: function ( k ) {

			var s, a = 0.1, p = 0.4;
			if ( k === 0 ) return 0;
			if ( k === 1 ) return 1;
			if ( !a || a < 1 ) { a = 1; s = p / 4; }
			else s = p * Math.asin( 1 / a ) / ( 2 * Math.PI );
			if ( ( k *= 2 ) < 1 ) return - 0.5 * ( a * Math.pow( 2, 10 * ( k -= 1 ) ) * Math.sin( ( k - s ) * ( 2 * Math.PI ) / p ) );
			return a * Math.pow( 2, -10 * ( k -= 1 ) ) * Math.sin( ( k - s ) * ( 2 * Math.PI ) / p ) * 0.5 + 1;

		}

	},

	Back: {

		In: function ( k ) {

			var s = 1.70158;
			return k * k * ( ( s + 1 ) * k - s );

		},

		Out: function ( k ) {

			var s = 1.70158;
			return --k * k * ( ( s + 1 ) * k + s ) + 1;

		},

		InOut: function ( k ) {

			var s = 1.70158 * 1.525;
			if ( ( k *= 2 ) < 1 ) return 0.5 * ( k * k * ( ( s + 1 ) * k - s ) );
			return 0.5 * ( ( k -= 2 ) * k * ( ( s + 1 ) * k + s ) + 2 );

		}

	},

	Bounce: {

		In: function ( k ) {

			return 1 - TWEEN.Easing.Bounce.Out( 1 - k );

		},

		Out: function ( k ) {

			if ( k < ( 1 / 2.75 ) ) {

				return 7.5625 * k * k;

			} else if ( k < ( 2 / 2.75 ) ) {

				return 7.5625 * ( k -= ( 1.5 / 2.75 ) ) * k + 0.75;

			} else if ( k < ( 2.5 / 2.75 ) ) {

				return 7.5625 * ( k -= ( 2.25 / 2.75 ) ) * k + 0.9375;

			} else {

				return 7.5625 * ( k -= ( 2.625 / 2.75 ) ) * k + 0.984375;

			}

		},

		InOut: function ( k ) {

			if ( k < 0.5 ) return TWEEN.Easing.Bounce.In( k * 2 ) * 0.5;
			return TWEEN.Easing.Bounce.Out( k * 2 - 1 ) * 0.5 + 0.5;

		}

	}

};

TWEEN.Interpolation = {

	Linear: function ( v, k ) {

		var m = v.length - 1, f = m * k, i = Math.floor( f ), fn = TWEEN.Interpolation.Utils.Linear;

		if ( k < 0 ) return fn( v[ 0 ], v[ 1 ], f );
		if ( k > 1 ) return fn( v[ m ], v[ m - 1 ], m - f );

		return fn( v[ i ], v[ i + 1 > m ? m : i + 1 ], f - i );

	},

	Bezier: function ( v, k ) {

		var b = 0, n = v.length - 1, pw = Math.pow, bn = TWEEN.Interpolation.Utils.Bernstein, i;

		for ( i = 0; i <= n; i++ ) {
			b += pw( 1 - k, n - i ) * pw( k, i ) * v[ i ] * bn( n, i );
		}

		return b;

	},

	CatmullRom: function ( v, k ) {

		var m = v.length - 1, f = m * k, i = Math.floor( f ), fn = TWEEN.Interpolation.Utils.CatmullRom;

		if ( v[ 0 ] === v[ m ] ) {

			if ( k < 0 ) i = Math.floor( f = m * ( 1 + k ) );

			return fn( v[ ( i - 1 + m ) % m ], v[ i ], v[ ( i + 1 ) % m ], v[ ( i + 2 ) % m ], f - i );

		} else {

			if ( k < 0 ) return v[ 0 ] - ( fn( v[ 0 ], v[ 0 ], v[ 1 ], v[ 1 ], -f ) - v[ 0 ] );
			if ( k > 1 ) return v[ m ] - ( fn( v[ m ], v[ m ], v[ m - 1 ], v[ m - 1 ], f - m ) - v[ m ] );

			return fn( v[ i ? i - 1 : 0 ], v[ i ], v[ m < i + 1 ? m : i + 1 ], v[ m < i + 2 ? m : i + 2 ], f - i );

		}

	},

	Utils: {

		Linear: function ( p0, p1, t ) {

			return ( p1 - p0 ) * t + p0;

		},

		Bernstein: function ( n , i ) {

			var fc = TWEEN.Interpolation.Utils.Factorial;
			return fc( n ) / fc( i ) / fc( n - i );

		},

		Factorial: ( function () {

			var a = [ 1 ];

			return function ( n ) {

				var s = 1, i;
				if ( a[ n ] ) return a[ n ];
				for ( i = n; i > 1; i-- ) s *= i;
				return a[ n ] = s;

			};

		} )(),

		CatmullRom: function ( p0, p1, p2, p3, t ) {

			var v0 = ( p2 - p0 ) * 0.5, v1 = ( p3 - p1 ) * 0.5, t2 = t * t, t3 = t * t2;
			return ( 2 * p1 - 2 * p2 + v0 + v1 ) * t3 + ( - 3 * p1 + 3 * p2 - 2 * v0 - v1 ) * t2 + v0 * t + p1;

		}

	}

};
;
(function(global,factory){typeof exports==="object"&&typeof module!=="undefined"?module.exports=factory(global):typeof define==="function"&&define.amd?define(factory):factory(global)})(typeof self!=="undefined"?self:typeof window!=="undefined"?window:typeof global!=="undefined"?global:this,function(global){"use strict";global=global||{};var _Base64=global.Base64;var version="2.5.1";var buffer;if(typeof module!=="undefined"&&module.exports){try{buffer=eval("require('buffer').Buffer")}catch(err){buffer=undefined}}var b64chars="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";var b64tab=function(bin){var t={};for(var i=0,l=bin.length;i<l;i++)t[bin.charAt(i)]=i;return t}(b64chars);var fromCharCode=String.fromCharCode;var cb_utob=function(c){if(c.length<2){var cc=c.charCodeAt(0);return cc<128?c:cc<2048?fromCharCode(192|cc>>>6)+fromCharCode(128|cc&63):fromCharCode(224|cc>>>12&15)+fromCharCode(128|cc>>>6&63)+fromCharCode(128|cc&63)}else{var cc=65536+(c.charCodeAt(0)-55296)*1024+(c.charCodeAt(1)-56320);return fromCharCode(240|cc>>>18&7)+fromCharCode(128|cc>>>12&63)+fromCharCode(128|cc>>>6&63)+fromCharCode(128|cc&63)}};var re_utob=/[\uD800-\uDBFF][\uDC00-\uDFFFF]|[^\x00-\x7F]/g;var utob=function(u){return u.replace(re_utob,cb_utob)};var cb_encode=function(ccc){var padlen=[0,2,1][ccc.length%3],ord=ccc.charCodeAt(0)<<16|(ccc.length>1?ccc.charCodeAt(1):0)<<8|(ccc.length>2?ccc.charCodeAt(2):0),chars=[b64chars.charAt(ord>>>18),b64chars.charAt(ord>>>12&63),padlen>=2?"=":b64chars.charAt(ord>>>6&63),padlen>=1?"=":b64chars.charAt(ord&63)];return chars.join("")};var btoa=global.btoa?function(b){return global.btoa(b)}:function(b){return b.replace(/[\s\S]{1,3}/g,cb_encode)};var _encode=buffer?buffer.from&&Uint8Array&&buffer.from!==Uint8Array.from?function(u){return(u.constructor===buffer.constructor?u:buffer.from(u)).toString("base64")}:function(u){return(u.constructor===buffer.constructor?u:new buffer(u)).toString("base64")}:function(u){return btoa(utob(u))};var encode=function(u,urisafe){return!urisafe?_encode(String(u)):_encode(String(u)).replace(/[+\/]/g,function(m0){return m0=="+"?"-":"_"}).replace(/=/g,"")};var encodeURI=function(u){return encode(u,true)};var re_btou=new RegExp(["[À-ß][€-¿]","[à-ï][€-¿]{2}","[ð-÷][€-¿]{3}"].join("|"),"g");var cb_btou=function(cccc){switch(cccc.length){case 4:var cp=(7&cccc.charCodeAt(0))<<18|(63&cccc.charCodeAt(1))<<12|(63&cccc.charCodeAt(2))<<6|63&cccc.charCodeAt(3),offset=cp-65536;return fromCharCode((offset>>>10)+55296)+fromCharCode((offset&1023)+56320);case 3:return fromCharCode((15&cccc.charCodeAt(0))<<12|(63&cccc.charCodeAt(1))<<6|63&cccc.charCodeAt(2));default:return fromCharCode((31&cccc.charCodeAt(0))<<6|63&cccc.charCodeAt(1))}};var btou=function(b){return b.replace(re_btou,cb_btou)};var cb_decode=function(cccc){var len=cccc.length,padlen=len%4,n=(len>0?b64tab[cccc.charAt(0)]<<18:0)|(len>1?b64tab[cccc.charAt(1)]<<12:0)|(len>2?b64tab[cccc.charAt(2)]<<6:0)|(len>3?b64tab[cccc.charAt(3)]:0),chars=[fromCharCode(n>>>16),fromCharCode(n>>>8&255),fromCharCode(n&255)];chars.length-=[0,0,2,1][padlen];return chars.join("")};var _atob=global.atob?function(a){return global.atob(a)}:function(a){return a.replace(/\S{1,4}/g,cb_decode)};var atob=function(a){return _atob(String(a).replace(/[^A-Za-z0-9\+\/]/g,""))};var _decode=buffer?buffer.from&&Uint8Array&&buffer.from!==Uint8Array.from?function(a){return(a.constructor===buffer.constructor?a:buffer.from(a,"base64")).toString()}:function(a){return(a.constructor===buffer.constructor?a:new buffer(a,"base64")).toString()}:function(a){return btou(_atob(a))};var decode=function(a){return _decode(String(a).replace(/[-_]/g,function(m0){return m0=="-"?"+":"/"}).replace(/[^A-Za-z0-9\+\/]/g,""))};var noConflict=function(){var Base64=global.Base64;global.Base64=_Base64;return Base64};global.Base64={VERSION:version,atob:atob,btoa:btoa,fromBase64:decode,toBase64:encode,utob:utob,encode:encode,encodeURI:encodeURI,btou:btou,decode:decode,noConflict:noConflict,__buffer__:buffer};if(typeof Object.defineProperty==="function"){var noEnum=function(v){return{value:v,enumerable:false,writable:true,configurable:true}};global.Base64.extendString=function(){Object.defineProperty(String.prototype,"fromBase64",noEnum(function(){return decode(this)}));Object.defineProperty(String.prototype,"toBase64",noEnum(function(urisafe){return encode(this,urisafe)}));Object.defineProperty(String.prototype,"toBase64URI",noEnum(function(){return encode(this,true)}))}}if(global["Meteor"]){Base64=global.Base64}if(typeof module!=="undefined"&&module.exports){module.exports.Base64=global.Base64}else if(typeof define==="function"&&define.amd){define([],function(){return global.Base64})}return{Base64:global.Base64}});;
/*
 bytebuffer.js (c) 2015 Daniel Wirtz <dcode@dcode.io>
 Backing buffer: ArrayBuffer, Accessor: Uint8Array
 Released under the Apache License, Version 2.0
 see: https://github.com/dcodeIO/bytebuffer.js for details
*/
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/*
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function(b){var c=this.tn.next();if(!d.NAME.test(c))throw Error("illegal rpc service method name: "+c);var a=c,l={request:null,response:null,request_stream:!1,response_stream:!1,options:{}};this.tn.skip("(");c=this.tn.next();"stream"===c.toLowerCase()&&(l.request_stream=!0,c=this.tn.next());if(!d.TYPEREF.test(c))throw Error("illegal rpc service request type: "+c);l.request=c;this.tn.skip(")");c=this.tn.next();if("returns"!==c.toLowerCase())throw Error("illegal rpc service request type delimiter: "+
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function(){var a=[],c,d;do{for(d=[];;){c=this.tn.next();switch(c){case "min":c=b.ID_MIN;break;case "max":c=b.ID_MAX;break;default:c=q(c)}d.push(c);if(2===d.length)break;if("to"!==this.tn.peek()){d.push(c);break}this.tn.next()}a.push(d)}while(this.tn.omit(","));this.tn.skip(";");return a};e._parseExtend=function(b){var a=this.tn.next();if(!d.TYPEREF.test(a))throw Error("illegal extend reference: "+a);var e={ref:a,fields:[]};for(this.tn.skip("{");"}"!==(a=this.tn.next());)if(d.RULE.test(a))this._parseMessageField(e,
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typeof m?g.unsigned:m);if("string"===typeof g)return b.Long.fromString(g,m||!1,10);if("number"===typeof g)return b.Long.fromNumber(g,m||!1);throw Error("not convertible to Long");}function p(g,m){var a=m.readVarint32(),c=a&7,a=a>>>3;switch(c){case b.WIRE_TYPES.VARINT:do a=m.readUint8();while(128===(a&128));break;case b.WIRE_TYPES.BITS64:m.offset+=8;break;case b.WIRE_TYPES.LDELIM:a=m.readVarint32();m.offset+=a;break;case b.WIRE_TYPES.STARTGROUP:p(a,m);break;case b.WIRE_TYPES.ENDGROUP:if(a===g)return!1;
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b,d=this,e=0;if(""===c[e]){for(;null!==d.parent;)d=d.parent;e++}do{do{if(!(d instanceof q.Namespace)){d=null;break}d=d.getChild(c[e]);if(!(d&&d instanceof q.T)||a&&!(d instanceof q.Namespace)){d=null;break}e++}while(e<c.length);if(null!=d)break;if(null!==this.parent)return this.parent.resolve(b,a)}while(null!=d);return d};k.qn=function(b){var a=[],c=b;do a.unshift(c.name),c=c.parent;while(null!==c);for(c=1;c<=a.length;c++){var d=a.slice(a.length-c);if(b===this.resolve(d,b instanceof q.Namespace))return d.join(".")}return b.fqn()};
k.build=function(){for(var b={},c=this.children,d=0,e=c.length,l;d<e;++d)l=c[d],l instanceof a&&(b[l.name]=l.build());Object.defineProperty&&Object.defineProperty(b,"$options",{value:this.buildOpt()});return b};k.buildOpt=function(){for(var b={},a=Object.keys(this.options),c=0,d=a.length;c<d;++c)b[a[c]]=this.options[a[c]];return b};k.getOption=function(b){return"undefined"===typeof b?this.options:"undefined"!==typeof this.options[b]?this.options[b]:null};q.Namespace=a;var e=function(g,a,c,d){this.type=
g;this.resolvedType=a;this.isMapKey=c;this.syntax=d;if(c&&0>b.MAP_KEY_TYPES.indexOf(g))throw Error("Invalid map key type: "+g.name);},f=e.prototype;e.defaultFieldValue=function(g){"string"===typeof g&&(g=b.TYPES[g]);if("undefined"===typeof g.defaultValue)throw Error("default value for type "+g.name+" is not supported");return g==b.TYPES.bytes?new h(0):g.defaultValue};f.verifyValue=function(g){function a(b,g){throw Error("Illegal value for "+c.toString(!0)+" of type "+c.type.name+": "+b+" ("+g+")");
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0;k<f.length;k++)if(f[k].name==g||f[k].id==g)return f[k].id;if("proto3"===this.syntax)return("number"!==typeof g||g===g&&0!==g%1)&&a(typeof g,"not an integer"),(4294967295<g||0>g)&&a(typeof g,"not in range for uint32"),g;a(g,"not a valid enum value");case b.TYPES.group:case b.TYPES.message:g&&"object"===typeof g||a(typeof g,"object expected");if(g instanceof this.resolvedType.clazz)return g;if(g instanceof b.Builder.Message){var f={},k;for(k in g)g.hasOwnProperty(k)&&(f[k]=g[k]);g=f}return new this.resolvedType.clazz(g)}throw Error("[INTERNAL] Illegal value for "+
this.toString(!0)+": "+g+" (undefined type "+this.type+")");};f.calculateLength=function(g,a){if(null===a)return 0;var c;switch(this.type){case b.TYPES.int32:return 0>a?h.calculateVarint64(a):h.calculateVarint32(a);case b.TYPES.uint32:return h.calculateVarint32(a);case b.TYPES.sint32:return h.calculateVarint32(h.zigZagEncode32(a));case b.TYPES.fixed32:case b.TYPES.sfixed32:case b.TYPES["float"]:return 4;case b.TYPES.int64:case b.TYPES.uint64:return h.calculateVarint64(a);case b.TYPES.sint64:return h.calculateVarint64(h.zigZagEncode64(a));
case b.TYPES.fixed64:case b.TYPES.sfixed64:return 8;case b.TYPES.bool:return 1;case b.TYPES["enum"]:return h.calculateVarint32(a);case b.TYPES["double"]:return 8;case b.TYPES.string:return c=h.calculateUTF8Bytes(a),h.calculateVarint32(c)+c;case b.TYPES.bytes:if(0>a.remaining())throw Error("Illegal value for "+this.toString(!0)+": "+a.remaining()+" bytes remaining");return h.calculateVarint32(a.remaining())+a.remaining();case b.TYPES.message:return c=this.resolvedType.calculate(a),h.calculateVarint32(c)+
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null;var l;if(this.repeated&&!c){Array.isArray(a)||(a=[a]);var f=[];for(l=0;l<a.length;l++)f.push(this.element.verifyValue(a[l]));return f}if(this.map&&!c){if(a instanceof b.Map)return a;a instanceof Object||d(typeof a,"expected ProtoBuf.Map or raw object for map field");return new b.Map(this,a)}!this.repeated&&Array.isArray(a)&&d(typeof a,"no array expected");return this.element.verifyValue(a)};f.hasWirePresence=function(a,c){if("proto3"!==this.syntax)return null!==a;if(this.oneof&&c[this.oneof.name]===
this.name)return!0;switch(this.type){case b.TYPES.int32:case b.TYPES.sint32:case b.TYPES.sfixed32:case b.TYPES.uint32:case b.TYPES.fixed32:return 0!==a;case b.TYPES.int64:case b.TYPES.sint64:case b.TYPES.sfixed64:case b.TYPES.uint64:case b.TYPES.fixed64:return 0!==a.low||0!==a.high;case b.TYPES.bool:return a;case b.TYPES["float"]:case b.TYPES["double"]:return 0!==a;case b.TYPES.string:return 0<a.length;case b.TYPES.bytes:return 0<a.remaining();case b.TYPES["enum"]:return 0!==a;case b.TYPES.message:return null!==
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for(var c=this.getChildren(t.Value),d=0,e=c.length;d<e;++d)a[c[d].name]=c[d].id;Object.defineProperty&&Object.defineProperty(a,"$options",{value:this.buildOpt(),enumerable:!1});return this.object=a};q.Enum=t;f=function(a,b,c,d){n.call(this,a,b,c);this.className="Enum.Value";this.id=d};f.prototype=Object.create(n.prototype);q.Enum.Value=f;var l=function(a,b,c,d){n.call(this,a,b,c);this.field=d};l.prototype=Object.create(n.prototype);q.Extension=l;var w=function(b,c,d,e){a.call(this,b,c,d,e);this.className=
"Service";this.clazz=null};(w.prototype=Object.create(a.prototype)).build=function(a){return this.clazz&&!a?this.clazz:this.clazz=function(a,b){for(var c=function(b){a.Builder.Service.call(this);this.rpcImpl=b||function(a,b,c){setTimeout(c.bind(this,Error("Not implemented, see: https://github.com/dcodeIO/ProtoBuf.js/wiki/Services")),0)}},d=c.prototype=Object.create(a.Builder.Service.prototype),e=b.getChildren(a.Reflect.Service.RPCMethod),l=0;l<e.length;l++)(function(a){d[a.name]=function(c,d){try{try{c=
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l),0)}};c[a.name]=function(b,d,e){(new c(b))[a.name](d,e)};Object.defineProperty&&(Object.defineProperty(c[a.name],"$options",{value:a.buildOpt()}),Object.defineProperty(d[a.name],"$options",{value:c[a.name].$options}))})(e[l]);Object.defineProperty&&(Object.defineProperty(c,"$options",{value:b.buildOpt()}),Object.defineProperty(d,"$options",{value:c.$options}),Object.defineProperty(c,"$type",{value:b}),Object.defineProperty(d,"$type",{value:b}));return c}(b,this)};q.Service=w;var v=function(a,b,
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a.messages.forEach(function(b){b.syntax=a.syntax;q(b)});a.enums&&a.enums.forEach(function(b){b.syntax=a.syntax})}var n=function(a){this.ptr=this.ns=new h.Namespace(this,null,"");this.resolved=!1;this.result=null;this.files={};this.importRoot=null;this.options=a||{}},k=n.prototype;n.isMessage=function(a){return"string"!==typeof a.name||"undefined"!==typeof a.values||"undefined"!==typeof a.rpc?!1:!0};n.isMessageField=function(a){return"string"!==typeof a.rule||"string"!==typeof a.name||"string"!==typeof a.type||
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new h.Message.OneOf(this,k,a))},this);f.fields&&f.fields.forEach(function(a){if(null!==k.getChild(a.id|0))throw Error("duplicate or invalid field id in "+k.name+": "+a.id);if(a.options&&"object"!==typeof a.options)throw Error("illegal field options in "+k.name+"#"+a.name);var b=null;if("string"===typeof a.oneof&&!(b=c[a.oneof]))throw Error("illegal oneof in "+k.name+"#"+a.name+": "+a.oneof);a=new h.Message.Field(this,k,a.rule,a.keytype,a.type,a.name,a.id,a.options,b,f.syntax);b&&b.fields.push(a);
k.addChild(a)},this);var r=[];f.enums&&f.enums.forEach(function(a){r.push(a)});f.messages&&f.messages.forEach(function(a){r.push(a)});f.services&&f.services.forEach(function(a){r.push(a)});f.extensions&&(k.extensions="number"===typeof f.extensions[0]?[f.extensions]:f.extensions);this.ptr.addChild(k);if(0<r.length){d.push(a);a=r;r=null;this.ptr=k;k=null;continue}r=null}else if(n.isEnum(f))k=new h.Enum(this,this.ptr,f.name,f.options,f.syntax),f.values.forEach(function(a){k.addChild(new h.Enum.Value(this,
k,a.name,a.id))},this),this.ptr.addChild(k);else if(n.isService(f))k=new h.Service(this,this.ptr,f.name,f.options),Object.keys(f.rpc).forEach(function(a){var b=f.rpc[a];k.addChild(new h.Service.RPCMethod(this,k,a,b.request,b.response,!!b.request_stream,!!b.response_stream,b.options))},this),this.ptr.addChild(k);else if(n.isExtend(f))if(k=this.ptr.resolve(f.ref,!0))f.fields.forEach(function(a){if(null!==k.getChild(a.id|0))throw Error("duplicate extended field id in "+k.name+": "+a.id);if(k.extensions){var c=
!1;k.extensions.forEach(function(b){a.id>=b[0]&&a.id<=b[1]&&(c=!0)});if(!c)throw Error("illegal extended field id in "+k.name+": "+a.id+" (not within valid ranges)");}var d=a.name;this.options.convertFieldsToCamelCase&&(d=b.Util.toCamelCase(d));var d=new h.Message.ExtensionField(this,k,a.rule,a.type,this.ptr.fqn()+"."+d,a.id,a.options),e=new h.Extension(this,this.ptr,a.name,d);d.extension=e;this.ptr.addChild(e);k.addChild(d)},this);else{if(!/\.?google\.protobuf\./.test(f.ref))throw Error("extended message "+
f.ref+" is not defined");}else throw Error("not a valid definition: "+JSON.stringify(f));k=f=null}a=null;this.ptr=this.ptr.parent}this.resolved=!1;this.result=null;return this};k["import"]=function(a,d){var k="/";if("string"===typeof d){b.Util.IS_NODE&&(d=require("path").resolve(d));if(!0===this.files[d])return this.reset();this.files[d]=!0}else if("object"===typeof d){var h=d.root;b.Util.IS_NODE&&(h=require("path").resolve(h));if(0<=h.indexOf("\\")||0<=d.file.indexOf("\\"))k="\\";h=h+k+d.file;if(!0===
this.files[h])return this.reset();this.files[h]=!0}if(a.imports&&0<a.imports.length){var c=!1;if("object"===typeof d){if(this.importRoot=d.root,c=!0,h=this.importRoot,d=d.file,0<=h.indexOf("\\")||0<=d.indexOf("\\"))k="\\"}else"string"===typeof d?this.importRoot?h=this.importRoot:0<=d.indexOf("/")?(h=d.replace(/\/[^\/]*$/,""),""===h&&(h="/")):0<=d.indexOf("\\")?(h=d.replace(/\\[^\\]*$/,""),k="\\"):h=".":h=null;for(var r=0;r<a.imports.length;r++)if("string"===typeof a.imports[r]){if(!h)throw Error("cannot determine import root");
var l=a.imports[r];if("google/protobuf/descriptor.proto"!==l&&(l=h+k+l,!0!==this.files[l])){/\.proto$/i.test(l)&&!b.DotProto&&(l=l.replace(/\.proto$/,".json"));var n=b.Util.fetch(l);if(null===n)throw Error("failed to import '"+l+"' in '"+d+"': file not found");if(/\.json$/i.test(l))this["import"](JSON.parse(n+""),l);else this["import"](b.DotProto.Parser.parse(n),l)}}else if(d)if(/\.(\w+)$/.test(d))this["import"](a.imports[r],d.replace(/^(.+)\.(\w+)$/,function(a,b,c){return b+"_import"+r+"."+c}));
else this["import"](a.imports[r],d+"_import"+r);else this["import"](a.imports[r]);c&&(this.importRoot=null)}a["package"]&&this.define(a["package"]);a.syntax&&q(a);var p=this.ptr;a.options&&Object.keys(a.options).forEach(function(b){p.options[b]=a.options[b]});a.messages&&(this.create(a.messages),this.ptr=p);a.enums&&(this.create(a.enums),this.ptr=p);a.services&&(this.create(a.services),this.ptr=p);a["extends"]&&this.create(a["extends"]);return this.reset()};k.resolveAll=function(){var a;if(null==
this.ptr||"object"===typeof this.ptr.type)return this;if(this.ptr instanceof h.Namespace)this.ptr.children.forEach(function(a){this.ptr=a;this.resolveAll()},this);else if(this.ptr instanceof h.Message.Field){if(d.TYPE.test(this.ptr.type))this.ptr.type=b.TYPES[this.ptr.type];else{if(!d.TYPEREF.test(this.ptr.type))throw Error("illegal type reference in "+this.ptr.toString(!0)+": "+this.ptr.type);a=(this.ptr instanceof h.Message.ExtensionField?this.ptr.extension.parent:this.ptr.parent).resolve(this.ptr.type,
!0);if(!a)throw Error("unresolvable type reference in "+this.ptr.toString(!0)+": "+this.ptr.type);this.ptr.resolvedType=a;if(a instanceof h.Enum){if(this.ptr.type=b.TYPES["enum"],"proto3"===this.ptr.syntax&&"proto3"!==a.syntax)throw Error("proto3 message cannot reference proto2 enum");}else if(a instanceof h.Message)this.ptr.type=a.isGroup?b.TYPES.group:b.TYPES.message;else throw Error("illegal type reference in "+this.ptr.toString(!0)+": "+this.ptr.type);}if(this.ptr.map){if(!d.TYPE.test(this.ptr.keyType))throw Error("illegal key type for map field in "+
this.ptr.toString(!0)+": "+this.ptr.keyType);this.ptr.keyType=b.TYPES[this.ptr.keyType]}}else if(this.ptr instanceof b.Reflect.Service.Method)if(this.ptr instanceof b.Reflect.Service.RPCMethod){a=this.ptr.parent.resolve(this.ptr.requestName,!0);if(!(a&&a instanceof b.Reflect.Message))throw Error("Illegal type reference in "+this.ptr.toString(!0)+": "+this.ptr.requestName);this.ptr.resolvedRequestType=a;a=this.ptr.parent.resolve(this.ptr.responseName,!0);if(!(a&&a instanceof b.Reflect.Message))throw Error("Illegal type reference in "+
this.ptr.toString(!0)+": "+this.ptr.responseName);this.ptr.resolvedResponseType=a}else throw Error("illegal service type in "+this.ptr.toString(!0));else if(!(this.ptr instanceof b.Reflect.Message.OneOf||this.ptr instanceof b.Reflect.Extension||this.ptr instanceof b.Reflect.Enum.Value))throw Error("illegal object in namespace: "+typeof this.ptr+": "+this.ptr);return this.reset()};k.build=function(a){this.reset();this.resolved||(this.resolveAll(),this.resolved=!0,this.result=null);null===this.result&&
(this.result=this.ns.build());if(!a)return this.result;a="string"===typeof a?a.split("."):a;for(var b=this.result,d=0;d<a.length;d++)if(b[a[d]])b=b[a[d]];else{b=null;break}return b};k.lookup=function(a,b){return a?this.ns.resolve(a,b):this.ns};k.toString=function(){return"Builder"};n.Message=function(){};n.Enum=function(){};n.Service=function(){};return n}(d,d.Lang,d.Reflect);d.Map=function(b,d){function h(b){var a=0;return{next:function(){return a<b.length?{done:!1,value:b[a++]}:{done:!0}}}}var q=
function(b,a){if(!b.map)throw Error("field is not a map");this.field=b;this.keyElem=new d.Element(b.keyType,null,!0,b.syntax);this.valueElem=new d.Element(b.type,b.resolvedType,!1,b.syntax);this.map={};Object.defineProperty(this,"size",{get:function(){return Object.keys(this.map).length}});if(a)for(var e=Object.keys(a),f=0;f<e.length;f++){var h=this.keyElem.valueFromString(e[f]),c=this.valueElem.verifyValue(a[e[f]]);this.map[this.keyElem.valueToString(h)]={key:h,value:c}}},n=q.prototype;n.clear=function(){this.map=
{}};n["delete"]=function(b){b=this.keyElem.valueToString(this.keyElem.verifyValue(b));var a=b in this.map;delete this.map[b];return a};n.entries=function(){for(var b=[],a=Object.keys(this.map),d=0,f;d<a.length;d++)b.push([(f=this.map[a[d]]).key,f.value]);return h(b)};n.keys=function(){for(var b=[],a=Object.keys(this.map),d=0;d<a.length;d++)b.push(this.map[a[d]].key);return h(b)};n.values=function(){for(var b=[],a=Object.keys(this.map),d=0;d<a.length;d++)b.push(this.map[a[d]].value);return h(b)};n.forEach=
function(b,a){for(var d=Object.keys(this.map),f=0,h;f<d.length;f++)b.call(a,(h=this.map[d[f]]).value,h.key,this)};n.set=function(b,a){var d=this.keyElem.verifyValue(b),f=this.valueElem.verifyValue(a);this.map[this.keyElem.valueToString(d)]={key:d,value:f};return this};n.get=function(b){b=this.keyElem.valueToString(this.keyElem.verifyValue(b));return b in this.map?this.map[b].value:void 0};n.has=function(b){return this.keyElem.valueToString(this.keyElem.verifyValue(b))in this.map};return q}(d,d.Reflect);
d.loadProto=function(b,h,p){if("string"===typeof h||h&&"string"===typeof h.file&&"string"===typeof h.root)p=h,h=void 0;return d.loadJson(d.DotProto.Parser.parse(b),h,p)};d.protoFromString=d.loadProto;d.loadProtoFile=function(b,h,p){h&&"object"===typeof h?(p=h,h=null):h&&"function"===typeof h||(h=null);if(h)return d.Util.fetch("string"===typeof b?b:b.root+"/"+b.file,function(n){if(null===n)h(Error("Failed to fetch file"));else try{h(null,d.loadProto(n,p,b))}catch(k){h(k)}});var q=d.Util.fetch("object"===
typeof b?b.root+"/"+b.file:b);return null===q?null:d.loadProto(q,p,b)};d.protoFromFile=d.loadProtoFile;d.newBuilder=function(b){b=b||{};"undefined"===typeof b.convertFieldsToCamelCase&&(b.convertFieldsToCamelCase=d.convertFieldsToCamelCase);"undefined"===typeof b.populateAccessors&&(b.populateAccessors=d.populateAccessors);return new d.Builder(b)};d.loadJson=function(b,h,p){if("string"===typeof h||h&&"string"===typeof h.file&&"string"===typeof h.root)p=h,h=null;h&&"object"===typeof h||(h=d.newBuilder());
"string"===typeof b&&(b=JSON.parse(b));h["import"](b,p);h.resolveAll();return h};d.loadJsonFile=function(b,h,p){h&&"object"===typeof h?(p=h,h=null):h&&"function"===typeof h||(h=null);if(h)return d.Util.fetch("string"===typeof b?b:b.root+"/"+b.file,function(n){if(null===n)h(Error("Failed to fetch file"));else try{h(null,d.loadJson(JSON.parse(n),p,b))}catch(k){h(k)}});var q=d.Util.fetch("object"===typeof b?b.root+"/"+b.file:b);return null===q?null:d.loadJson(JSON.parse(q),p,b)};return d});
;
/*!
 * EventEmitter v5.2.6 - git.io/ee
 * Unlicense - http://unlicense.org/
 * Oliver Caldwell - https://oli.me.uk/
 * @preserve
 */
!function(e){"use strict";function t(){}function n(e,t){for(var n=e.length;n--;)if(e[n].listener===t)return n;return-1}function r(e){return function(){return this[e].apply(this,arguments)}}function i(e){return"function"==typeof e||e instanceof RegExp||!(!e||"object"!=typeof e)&&i(e.listener)}var s=t.prototype,o=e.EventEmitter;s.getListeners=function(e){var t,n,r=this._getEvents();if(e instanceof RegExp){t={};for(n in r)r.hasOwnProperty(n)&&e.test(n)&&(t[n]=r[n])}else t=r[e]||(r[e]=[]);return t},s.flattenListeners=function(e){var t,n=[];for(t=0;t<e.length;t+=1)n.push(e[t].listener);return n},s.getListenersAsObject=function(e){var t,n=this.getListeners(e);return n instanceof Array&&(t={},t[e]=n),t||n},s.addListener=function(e,t){if(!i(t))throw new TypeError("listener must be a function");var r,s=this.getListenersAsObject(e),o="object"==typeof t;for(r in s)s.hasOwnProperty(r)&&-1===n(s[r],t)&&s[r].push(o?t:{listener:t,once:!1});return this},s.on=r("addListener"),s.addOnceListener=function(e,t){return this.addListener(e,{listener:t,once:!0})},s.once=r("addOnceListener"),s.defineEvent=function(e){return this.getListeners(e),this},s.defineEvents=function(e){for(var t=0;t<e.length;t+=1)this.defineEvent(e[t]);return this},s.removeListener=function(e,t){var r,i,s=this.getListenersAsObject(e);for(i in s)s.hasOwnProperty(i)&&-1!==(r=n(s[i],t))&&s[i].splice(r,1);return this},s.off=r("removeListener"),s.addListeners=function(e,t){return this.manipulateListeners(!1,e,t)},s.removeListeners=function(e,t){return this.manipulateListeners(!0,e,t)},s.manipulateListeners=function(e,t,n){var r,i,s=e?this.removeListener:this.addListener,o=e?this.removeListeners:this.addListeners;if("object"!=typeof t||t instanceof RegExp)for(r=n.length;r--;)s.call(this,t,n[r]);else for(r in t)t.hasOwnProperty(r)&&(i=t[r])&&("function"==typeof i?s.call(this,r,i):o.call(this,r,i));return this},s.removeEvent=function(e){var t,n=typeof e,r=this._getEvents();if("string"===n)delete r[e];else if(e instanceof RegExp)for(t in r)r.hasOwnProperty(t)&&e.test(t)&&delete r[t];else delete this._events;return this},s.removeAllListeners=r("removeEvent"),s.emitEvent=function(e,t){var n,r,i,s,o=this.getListenersAsObject(e);for(s in o)if(o.hasOwnProperty(s))for(n=o[s].slice(0),i=0;i<n.length;i++)r=n[i],!0===r.once&&this.removeListener(e,r.listener),r.listener.apply(this,t||[])===this._getOnceReturnValue()&&this.removeListener(e,r.listener);return this},s.trigger=r("emitEvent"),s.emit=function(e){var t=Array.prototype.slice.call(arguments,1);return this.emitEvent(e,t)},s.setOnceReturnValue=function(e){return this._onceReturnValue=e,this},s._getOnceReturnValue=function(){return!this.hasOwnProperty("_onceReturnValue")||this._onceReturnValue},s._getEvents=function(){return this._events||(this._events={})},t.noConflict=function(){return e.EventEmitter=o,t},"function"==typeof define&&define.amd?define(function(){return t}):"object"==typeof module&&module.exports?module.exports=t:e.EventEmitter=t}("undefined"!=typeof window?window:this||{});;
/**
 * @license
 * Copyright 2010-2022 Three.js Authors
 * SPDX-License-Identifier: MIT
 */
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
	typeof define === 'function' && define.amd ? define(['exports'], factory) :
	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.THREE = {}));
})(this, (function (exports) { 'use strict';

	const REVISION = '143';
	const MOUSE = {
		LEFT: 0,
		MIDDLE: 1,
		RIGHT: 2,
		ROTATE: 0,
		DOLLY: 1,
		PAN: 2
	};
	const TOUCH = {
		ROTATE: 0,
		PAN: 1,
		DOLLY_PAN: 2,
		DOLLY_ROTATE: 3
	};
	const CullFaceNone = 0;
	const CullFaceBack = 1;
	const CullFaceFront = 2;
	const CullFaceFrontBack = 3;
	const BasicShadowMap = 0;
	const PCFShadowMap = 1;
	const PCFSoftShadowMap = 2;
	const VSMShadowMap = 3;
	const FrontSide = 0;
	const BackSide = 1;
	const DoubleSide = 2;
	const FlatShading = 1;
	const SmoothShading = 2;
	const NoBlending = 0;
	const NormalBlending = 1;
	const AdditiveBlending = 2;
	const SubtractiveBlending = 3;
	const MultiplyBlending = 4;
	const CustomBlending = 5;
	const AddEquation = 100;
	const SubtractEquation = 101;
	const ReverseSubtractEquation = 102;
	const MinEquation = 103;
	const MaxEquation = 104;
	const ZeroFactor = 200;
	const OneFactor = 201;
	const SrcColorFactor = 202;
	const OneMinusSrcColorFactor = 203;
	const SrcAlphaFactor = 204;
	const OneMinusSrcAlphaFactor = 205;
	const DstAlphaFactor = 206;
	const OneMinusDstAlphaFactor = 207;
	const DstColorFactor = 208;
	const OneMinusDstColorFactor = 209;
	const SrcAlphaSaturateFactor = 210;
	const NeverDepth = 0;
	const AlwaysDepth = 1;
	const LessDepth = 2;
	const LessEqualDepth = 3;
	const EqualDepth = 4;
	const GreaterEqualDepth = 5;
	const GreaterDepth = 6;
	const NotEqualDepth = 7;
	const MultiplyOperation = 0;
	const MixOperation = 1;
	const AddOperation = 2;
	const NoToneMapping = 0;
	const LinearToneMapping = 1;
	const ReinhardToneMapping = 2;
	const CineonToneMapping = 3;
	const ACESFilmicToneMapping = 4;
	const CustomToneMapping = 5;
	const UVMapping = 300;
	const CubeReflectionMapping = 301;
	const CubeRefractionMapping = 302;
	const EquirectangularReflectionMapping = 303;
	const EquirectangularRefractionMapping = 304;
	const CubeUVReflectionMapping = 306;
	const RepeatWrapping = 1000;
	const ClampToEdgeWrapping = 1001;
	const MirroredRepeatWrapping = 1002;
	const NearestFilter = 1003;
	const NearestMipmapNearestFilter = 1004;
	const NearestMipMapNearestFilter = 1004;
	const NearestMipmapLinearFilter = 1005;
	const NearestMipMapLinearFilter = 1005;
	const LinearFilter = 1006;
	const LinearMipmapNearestFilter = 1007;
	const LinearMipMapNearestFilter = 1007;
	const LinearMipmapLinearFilter = 1008;
	const LinearMipMapLinearFilter = 1008;
	const UnsignedByteType = 1009;
	const ByteType = 1010;
	const ShortType = 1011;
	const UnsignedShortType = 1012;
	const IntType = 1013;
	const UnsignedIntType = 1014;
	const FloatType = 1015;
	const HalfFloatType = 1016;
	const UnsignedShort4444Type = 1017;
	const UnsignedShort5551Type = 1018;
	const UnsignedInt248Type = 1020;
	const AlphaFormat = 1021;
	const RGBFormat = 1022;
	const RGBAFormat = 1023;
	const LuminanceFormat = 1024;
	const LuminanceAlphaFormat = 1025;
	const DepthFormat = 1026;
	const DepthStencilFormat = 1027;
	const RedFormat = 1028;
	const RedIntegerFormat = 1029;
	const RGFormat = 1030;
	const RGIntegerFormat = 1031;
	const RGBAIntegerFormat = 1033;
	const RGB_S3TC_DXT1_Format = 33776;
	const RGBA_S3TC_DXT1_Format = 33777;
	const RGBA_S3TC_DXT3_Format = 33778;
	const RGBA_S3TC_DXT5_Format = 33779;
	const RGB_PVRTC_4BPPV1_Format = 35840;
	const RGB_PVRTC_2BPPV1_Format = 35841;
	const RGBA_PVRTC_4BPPV1_Format = 35842;
	const RGBA_PVRTC_2BPPV1_Format = 35843;
	const RGB_ETC1_Format = 36196;
	const RGB_ETC2_Format = 37492;
	const RGBA_ETC2_EAC_Format = 37496;
	const RGBA_ASTC_4x4_Format = 37808;
	const RGBA_ASTC_5x4_Format = 37809;
	const RGBA_ASTC_5x5_Format = 37810;
	const RGBA_ASTC_6x5_Format = 37811;
	const RGBA_ASTC_6x6_Format = 37812;
	const RGBA_ASTC_8x5_Format = 37813;
	const RGBA_ASTC_8x6_Format = 37814;
	const RGBA_ASTC_8x8_Format = 37815;
	const RGBA_ASTC_10x5_Format = 37816;
	const RGBA_ASTC_10x6_Format = 37817;
	const RGBA_ASTC_10x8_Format = 37818;
	const RGBA_ASTC_10x10_Format = 37819;
	const RGBA_ASTC_12x10_Format = 37820;
	const RGBA_ASTC_12x12_Format = 37821;
	const RGBA_BPTC_Format = 36492;
	const LoopOnce = 2200;
	const LoopRepeat = 2201;
	const LoopPingPong = 2202;
	const InterpolateDiscrete = 2300;
	const InterpolateLinear = 2301;
	const InterpolateSmooth = 2302;
	const ZeroCurvatureEnding = 2400;
	const ZeroSlopeEnding = 2401;
	const WrapAroundEnding = 2402;
	const NormalAnimationBlendMode = 2500;
	const AdditiveAnimationBlendMode = 2501;
	const TrianglesDrawMode = 0;
	const TriangleStripDrawMode = 1;
	const TriangleFanDrawMode = 2;
	const LinearEncoding = 3000;
	const sRGBEncoding = 3001;
	const BasicDepthPacking = 3200;
	const RGBADepthPacking = 3201;
	const TangentSpaceNormalMap = 0;
	const ObjectSpaceNormalMap = 1; // Color space string identifiers, matching CSS Color Module Level 4 and WebGPU names where available.

	const NoColorSpace = '';
	const SRGBColorSpace = 'srgb';
	const LinearSRGBColorSpace = 'srgb-linear';
	const ZeroStencilOp = 0;
	const KeepStencilOp = 7680;
	const ReplaceStencilOp = 7681;
	const IncrementStencilOp = 7682;
	const DecrementStencilOp = 7683;
	const IncrementWrapStencilOp = 34055;
	const DecrementWrapStencilOp = 34056;
	const InvertStencilOp = 5386;
	const NeverStencilFunc = 512;
	const LessStencilFunc = 513;
	const EqualStencilFunc = 514;
	const LessEqualStencilFunc = 515;
	const GreaterStencilFunc = 516;
	const NotEqualStencilFunc = 517;
	const GreaterEqualStencilFunc = 518;
	const AlwaysStencilFunc = 519;
	const StaticDrawUsage = 35044;
	const DynamicDrawUsage = 35048;
	const StreamDrawUsage = 35040;
	const StaticReadUsage = 35045;
	const DynamicReadUsage = 35049;
	const StreamReadUsage = 35041;
	const StaticCopyUsage = 35046;
	const DynamicCopyUsage = 35050;
	const StreamCopyUsage = 35042;
	const GLSL1 = '100';
	const GLSL3 = '300 es';
	const _SRGBAFormat = 1035; // fallback for WebGL 1

	/**
	 * https://github.com/mrdoob/eventdispatcher.js/
	 */
	class EventDispatcher {
		addEventListener(type, listener) {
			if (this._listeners === undefined) this._listeners = {};
			const listeners = this._listeners;

			if (listeners[type] === undefined) {
				listeners[type] = [];
			}

			if (listeners[type].indexOf(listener) === -1) {
				listeners[type].push(listener);
			}
		}

		hasEventListener(type, listener) {
			if (this._listeners === undefined) return false;
			const listeners = this._listeners;
			return listeners[type] !== undefined && listeners[type].indexOf(listener) !== -1;
		}

		removeEventListener(type, listener) {
			if (this._listeners === undefined) return;
			const listeners = this._listeners;
			const listenerArray = listeners[type];

			if (listenerArray !== undefined) {
				const index = listenerArray.indexOf(listener);

				if (index !== -1) {
					listenerArray.splice(index, 1);
				}
			}
		}

		dispatchEvent(event) {
			if (this._listeners === undefined) return;
			const listeners = this._listeners;
			const listenerArray = listeners[event.type];

			if (listenerArray !== undefined) {
				event.target = this; // Make a copy, in case listeners are removed while iterating.

				const array = listenerArray.slice(0);

				for (let i = 0, l = array.length; i < l; i++) {
					array[i].call(this, event);
				}

				event.target = null;
			}
		}

	}

	const _lut = ['00', '01', '02', '03', '04', '05', '06', '07', '08', '09', '0a', '0b', '0c', '0d', '0e', '0f', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '1a', '1b', '1c', '1d', '1e', '1f', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '2a', '2b', '2c', '2d', '2e', '2f', '30', '31', '32', '33', '34', '35', '36', '37', '38', '39', '3a', '3b', '3c', '3d', '3e', '3f', '40', '41', '42', '43', '44', '45', '46', '47', '48', '49', '4a', '4b', '4c', '4d', '4e', '4f', '50', '51', '52', '53', '54', '55', '56', '57', '58', '59', '5a', '5b', '5c', '5d', '5e', '5f', '60', '61', '62', '63', '64', '65', '66', '67', '68', '69', '6a', '6b', '6c', '6d', '6e', '6f', '70', '71', '72', '73', '74', '75', '76', '77', '78', '79', '7a', '7b', '7c', '7d', '7e', '7f', '80', '81', '82', '83', '84', '85', '86', '87', '88', '89', '8a', '8b', '8c', '8d', '8e', '8f', '90', '91', '92', '93', '94', '95', '96', '97', '98', '99', '9a', '9b', '9c', '9d', '9e', '9f', 'a0', 'a1', 'a2', 'a3', 'a4', 'a5', 'a6', 'a7', 'a8', 'a9', 'aa', 'ab', 'ac', 'ad', 'ae', 'af', 'b0', 'b1', 'b2', 'b3', 'b4', 'b5', 'b6', 'b7', 'b8', 'b9', 'ba', 'bb', 'bc', 'bd', 'be', 'bf', 'c0', 'c1', 'c2', 'c3', 'c4', 'c5', 'c6', 'c7', 'c8', 'c9', 'ca', 'cb', 'cc', 'cd', 'ce', 'cf', 'd0', 'd1', 'd2', 'd3', 'd4', 'd5', 'd6', 'd7', 'd8', 'd9', 'da', 'db', 'dc', 'dd', 'de', 'df', 'e0', 'e1', 'e2', 'e3', 'e4', 'e5', 'e6', 'e7', 'e8', 'e9', 'ea', 'eb', 'ec', 'ed', 'ee', 'ef', 'f0', 'f1', 'f2', 'f3', 'f4', 'f5', 'f6', 'f7', 'f8', 'f9', 'fa', 'fb', 'fc', 'fd', 'fe', 'ff'];
	let _seed = 1234567;
	const DEG2RAD = Math.PI / 180;
	const RAD2DEG = 180 / Math.PI; // http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript/21963136#21963136

	function generateUUID() {
		const d0 = Math.random() * 0xffffffff | 0;
		const d1 = Math.random() * 0xffffffff | 0;
		const d2 = Math.random() * 0xffffffff | 0;
		const d3 = Math.random() * 0xffffffff | 0;
		const uuid = _lut[d0 & 0xff] + _lut[d0 >> 8 & 0xff] + _lut[d0 >> 16 & 0xff] + _lut[d0 >> 24 & 0xff] + '-' + _lut[d1 & 0xff] + _lut[d1 >> 8 & 0xff] + '-' + _lut[d1 >> 16 & 0x0f | 0x40] + _lut[d1 >> 24 & 0xff] + '-' + _lut[d2 & 0x3f | 0x80] + _lut[d2 >> 8 & 0xff] + '-' + _lut[d2 >> 16 & 0xff] + _lut[d2 >> 24 & 0xff] + _lut[d3 & 0xff] + _lut[d3 >> 8 & 0xff] + _lut[d3 >> 16 & 0xff] + _lut[d3 >> 24 & 0xff]; // .toLowerCase() here flattens concatenated strings to save heap memory space.

		return uuid.toLowerCase();
	}

	function clamp(value, min, max) {
		return Math.max(min, Math.min(max, value));
	} // compute euclidean modulo of m % n
	// https://en.wikipedia.org/wiki/Modulo_operation


	function euclideanModulo(n, m) {
		return (n % m + m) % m;
	} // Linear mapping from range <a1, a2> to range <b1, b2>


	function mapLinear(x, a1, a2, b1, b2) {
		return b1 + (x - a1) * (b2 - b1) / (a2 - a1);
	} // https://www.gamedev.net/tutorials/programming/general-and-gameplay-programming/inverse-lerp-a-super-useful-yet-often-overlooked-function-r5230/


	function inverseLerp(x, y, value) {
		if (x !== y) {
			return (value - x) / (y - x);
		} else {
			return 0;
		}
	} // https://en.wikipedia.org/wiki/Linear_interpolation


	function lerp(x, y, t) {
		return (1 - t) * x + t * y;
	} // http://www.rorydriscoll.com/2016/03/07/frame-rate-independent-damping-using-lerp/


	function damp(x, y, lambda, dt) {
		return lerp(x, y, 1 - Math.exp(-lambda * dt));
	} // https://www.desmos.com/calculator/vcsjnyz7x4


	function pingpong(x, length = 1) {
		return length - Math.abs(euclideanModulo(x, length * 2) - length);
	} // http://en.wikipedia.org/wiki/Smoothstep


	function smoothstep(x, min, max) {
		if (x <= min) return 0;
		if (x >= max) return 1;
		x = (x - min) / (max - min);
		return x * x * (3 - 2 * x);
	}

	function smootherstep(x, min, max) {
		if (x <= min) return 0;
		if (x >= max) return 1;
		x = (x - min) / (max - min);
		return x * x * x * (x * (x * 6 - 15) + 10);
	} // Random integer from <low, high> interval


	function randInt(low, high) {
		return low + Math.floor(Math.random() * (high - low + 1));
	} // Random float from <low, high> interval


	function randFloat(low, high) {
		return low + Math.random() * (high - low);
	} // Random float from <-range/2, range/2> interval


	function randFloatSpread(range) {
		return range * (0.5 - Math.random());
	} // Deterministic pseudo-random float in the interval [ 0, 1 ]


	function seededRandom(s) {
		if (s !== undefined) _seed = s; // Mulberry32 generator

		let t = _seed += 0x6D2B79F5;
		t = Math.imul(t ^ t >>> 15, t | 1);
		t ^= t + Math.imul(t ^ t >>> 7, t | 61);
		return ((t ^ t >>> 14) >>> 0) / 4294967296;
	}

	function degToRad(degrees) {
		return degrees * DEG2RAD;
	}

	function radToDeg(radians) {
		return radians * RAD2DEG;
	}

	function isPowerOfTwo(value) {
		return (value & value - 1) === 0 && value !== 0;
	}

	function ceilPowerOfTwo(value) {
		return Math.pow(2, Math.ceil(Math.log(value) / Math.LN2));
	}

	function floorPowerOfTwo(value) {
		return Math.pow(2, Math.floor(Math.log(value) / Math.LN2));
	}

	function setQuaternionFromProperEuler(q, a, b, c, order) {
		// Intrinsic Proper Euler Angles - see https://en.wikipedia.org/wiki/Euler_angles
		// rotations are applied to the axes in the order specified by 'order'
		// rotation by angle 'a' is applied first, then by angle 'b', then by angle 'c'
		// angles are in radians
		const cos = Math.cos;
		const sin = Math.sin;
		const c2 = cos(b / 2);
		const s2 = sin(b / 2);
		const c13 = cos((a + c) / 2);
		const s13 = sin((a + c) / 2);
		const c1_3 = cos((a - c) / 2);
		const s1_3 = sin((a - c) / 2);
		const c3_1 = cos((c - a) / 2);
		const s3_1 = sin((c - a) / 2);

		switch (order) {
			case 'XYX':
				q.set(c2 * s13, s2 * c1_3, s2 * s1_3, c2 * c13);
				break;

			case 'YZY':
				q.set(s2 * s1_3, c2 * s13, s2 * c1_3, c2 * c13);
				break;

			case 'ZXZ':
				q.set(s2 * c1_3, s2 * s1_3, c2 * s13, c2 * c13);
				break;

			case 'XZX':
				q.set(c2 * s13, s2 * s3_1, s2 * c3_1, c2 * c13);
				break;

			case 'YXY':
				q.set(s2 * c3_1, c2 * s13, s2 * s3_1, c2 * c13);
				break;

			case 'ZYZ':
				q.set(s2 * s3_1, s2 * c3_1, c2 * s13, c2 * c13);
				break;

			default:
				console.warn('THREE.MathUtils: .setQuaternionFromProperEuler() encountered an unknown order: ' + order);
		}
	}

	function denormalize$1(value, array) {
		switch (array.constructor) {
			case Float32Array:
				return value;

			case Uint16Array:
				return value / 65535.0;

			case Uint8Array:
				return value / 255.0;

			case Int16Array:
				return Math.max(value / 32767.0, -1.0);

			case Int8Array:
				return Math.max(value / 127.0, -1.0);

			default:
				throw new Error('Invalid component type.');
		}
	}

	function normalize(value, array) {
		switch (array.constructor) {
			case Float32Array:
				return value;

			case Uint16Array:
				return Math.round(value * 65535.0);

			case Uint8Array:
				return Math.round(value * 255.0);

			case Int16Array:
				return Math.round(value * 32767.0);

			case Int8Array:
				return Math.round(value * 127.0);

			default:
				throw new Error('Invalid component type.');
		}
	}

	var MathUtils = /*#__PURE__*/Object.freeze({
		__proto__: null,
		DEG2RAD: DEG2RAD,
		RAD2DEG: RAD2DEG,
		generateUUID: generateUUID,
		clamp: clamp,
		euclideanModulo: euclideanModulo,
		mapLinear: mapLinear,
		inverseLerp: inverseLerp,
		lerp: lerp,
		damp: damp,
		pingpong: pingpong,
		smoothstep: smoothstep,
		smootherstep: smootherstep,
		randInt: randInt,
		randFloat: randFloat,
		randFloatSpread: randFloatSpread,
		seededRandom: seededRandom,
		degToRad: degToRad,
		radToDeg: radToDeg,
		isPowerOfTwo: isPowerOfTwo,
		ceilPowerOfTwo: ceilPowerOfTwo,
		floorPowerOfTwo: floorPowerOfTwo,
		setQuaternionFromProperEuler: setQuaternionFromProperEuler,
		normalize: normalize,
		denormalize: denormalize$1
	});

	class Vector2 {
		constructor(x = 0, y = 0) {
			Vector2.prototype.isVector2 = true;
			this.x = x;
			this.y = y;
		}

		get width() {
			return this.x;
		}

		set width(value) {
			this.x = value;
		}

		get height() {
			return this.y;
		}

		set height(value) {
			this.y = value;
		}

		set(x, y) {
			this.x = x;
			this.y = y;
			return this;
		}

		setScalar(scalar) {
			this.x = scalar;
			this.y = scalar;
			return this;
		}

		setX(x) {
			this.x = x;
			return this;
		}

		setY(y) {
			this.y = y;
			return this;
		}

		setComponent(index, value) {
			switch (index) {
				case 0:
					this.x = value;
					break;

				case 1:
					this.y = value;
					break;

				default:
					throw new Error('index is out of range: ' + index);
			}

			return this;
		}

		getComponent(index) {
			switch (index) {
				case 0:
					return this.x;

				case 1:
					return this.y;

				default:
					throw new Error('index is out of range: ' + index);
			}
		}

		clone() {
			return new this.constructor(this.x, this.y);
		}

		copy(v) {
			this.x = v.x;
			this.y = v.y;
			return this;
		}

		add(v) {
			this.x += v.x;
			this.y += v.y;
			return this;
		}

		addScalar(s) {
			this.x += s;
			this.y += s;
			return this;
		}

		addVectors(a, b) {
			this.x = a.x + b.x;
			this.y = a.y + b.y;
			return this;
		}

		addScaledVector(v, s) {
			this.x += v.x * s;
			this.y += v.y * s;
			return this;
		}

		sub(v) {
			this.x -= v.x;
			this.y -= v.y;
			return this;
		}

		subScalar(s) {
			this.x -= s;
			this.y -= s;
			return this;
		}

		subVectors(a, b) {
			this.x = a.x - b.x;
			this.y = a.y - b.y;
			return this;
		}

		multiply(v) {
			this.x *= v.x;
			this.y *= v.y;
			return this;
		}

		multiplyScalar(scalar) {
			this.x *= scalar;
			this.y *= scalar;
			return this;
		}

		divide(v) {
			this.x /= v.x;
			this.y /= v.y;
			return this;
		}

		divideScalar(scalar) {
			return this.multiplyScalar(1 / scalar);
		}

		applyMatrix3(m) {
			const x = this.x,
						y = this.y;
			const e = m.elements;
			this.x = e[0] * x + e[3] * y + e[6];
			this.y = e[1] * x + e[4] * y + e[7];
			return this;
		}

		min(v) {
			this.x = Math.min(this.x, v.x);
			this.y = Math.min(this.y, v.y);
			return this;
		}

		max(v) {
			this.x = Math.max(this.x, v.x);
			this.y = Math.max(this.y, v.y);
			return this;
		}

		clamp(min, max) {
			// assumes min < max, componentwise
			this.x = Math.max(min.x, Math.min(max.x, this.x));
			this.y = Math.max(min.y, Math.min(max.y, this.y));
			return this;
		}

		clampScalar(minVal, maxVal) {
			this.x = Math.max(minVal, Math.min(maxVal, this.x));
			this.y = Math.max(minVal, Math.min(maxVal, this.y));
			return this;
		}

		clampLength(min, max) {
			const length = this.length();
			return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max, length)));
		}

		floor() {
			this.x = Math.floor(this.x);
			this.y = Math.floor(this.y);
			return this;
		}

		ceil() {
			this.x = Math.ceil(this.x);
			this.y = Math.ceil(this.y);
			return this;
		}

		round() {
			this.x = Math.round(this.x);
			this.y = Math.round(this.y);
			return this;
		}

		roundToZero() {
			this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);
			this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);
			return this;
		}

		negate() {
			this.x = -this.x;
			this.y = -this.y;
			return this;
		}

		dot(v) {
			return this.x * v.x + this.y * v.y;
		}

		cross(v) {
			return this.x * v.y - this.y * v.x;
		}

		lengthSq() {
			return this.x * this.x + this.y * this.y;
		}

		length() {
			return Math.sqrt(this.x * this.x + this.y * this.y);
		}

		manhattanLength() {
			return Math.abs(this.x) + Math.abs(this.y);
		}

		normalize() {
			return this.divideScalar(this.length() || 1);
		}

		angle() {
			// computes the angle in radians with respect to the positive x-axis
			const angle = Math.atan2(-this.y, -this.x) + Math.PI;
			return angle;
		}

		distanceTo(v) {
			return Math.sqrt(this.distanceToSquared(v));
		}

		distanceToSquared(v) {
			const dx = this.x - v.x,
						dy = this.y - v.y;
			return dx * dx + dy * dy;
		}

		manhattanDistanceTo(v) {
			return Math.abs(this.x - v.x) + Math.abs(this.y - v.y);
		}

		setLength(length) {
			return this.normalize().multiplyScalar(length);
		}

		lerp(v, alpha) {
			this.x += (v.x - this.x) * alpha;
			this.y += (v.y - this.y) * alpha;
			return this;
		}

		lerpVectors(v1, v2, alpha) {
			this.x = v1.x + (v2.x - v1.x) * alpha;
			this.y = v1.y + (v2.y - v1.y) * alpha;
			return this;
		}

		equals(v) {
			return v.x === this.x && v.y === this.y;
		}

		fromArray(array, offset = 0) {
			this.x = array[offset];
			this.y = array[offset + 1];
			return this;
		}

		toArray(array = [], offset = 0) {
			array[offset] = this.x;
			array[offset + 1] = this.y;
			return array;
		}

		fromBufferAttribute(attribute, index) {
			this.x = attribute.getX(index);
			this.y = attribute.getY(index);
			return this;
		}

		rotateAround(center, angle) {
			const c = Math.cos(angle),
						s = Math.sin(angle);
			const x = this.x - center.x;
			const y = this.y - center.y;
			this.x = x * c - y * s + center.x;
			this.y = x * s + y * c + center.y;
			return this;
		}

		random() {
			this.x = Math.random();
			this.y = Math.random();
			return this;
		}

		*[Symbol.iterator]() {
			yield this.x;
			yield this.y;
		}

	}

	class Matrix3 {
		constructor() {
			Matrix3.prototype.isMatrix3 = true;
			this.elements = [1, 0, 0, 0, 1, 0, 0, 0, 1];
		}

		set(n11, n12, n13, n21, n22, n23, n31, n32, n33) {
			const te = this.elements;
			te[0] = n11;
			te[1] = n21;
			te[2] = n31;
			te[3] = n12;
			te[4] = n22;
			te[5] = n32;
			te[6] = n13;
			te[7] = n23;
			te[8] = n33;
			return this;
		}

		identity() {
			this.set(1, 0, 0, 0, 1, 0, 0, 0, 1);
			return this;
		}

		copy(m) {
			const te = this.elements;
			const me = m.elements;
			te[0] = me[0];
			te[1] = me[1];
			te[2] = me[2];
			te[3] = me[3];
			te[4] = me[4];
			te[5] = me[5];
			te[6] = me[6];
			te[7] = me[7];
			te[8] = me[8];
			return this;
		}

		extractBasis(xAxis, yAxis, zAxis) {
			xAxis.setFromMatrix3Column(this, 0);
			yAxis.setFromMatrix3Column(this, 1);
			zAxis.setFromMatrix3Column(this, 2);
			return this;
		}

		setFromMatrix4(m) {
			const me = m.elements;
			this.set(me[0], me[4], me[8], me[1], me[5], me[9], me[2], me[6], me[10]);
			return this;
		}

		multiply(m) {
			return this.multiplyMatrices(this, m);
		}

		premultiply(m) {
			return this.multiplyMatrices(m, this);
		}

		multiplyMatrices(a, b) {
			const ae = a.elements;
			const be = b.elements;
			const te = this.elements;
			const a11 = ae[0],
						a12 = ae[3],
						a13 = ae[6];
			const a21 = ae[1],
						a22 = ae[4],
						a23 = ae[7];
			const a31 = ae[2],
						a32 = ae[5],
						a33 = ae[8];
			const b11 = be[0],
						b12 = be[3],
						b13 = be[6];
			const b21 = be[1],
						b22 = be[4],
						b23 = be[7];
			const b31 = be[2],
						b32 = be[5],
						b33 = be[8];
			te[0] = a11 * b11 + a12 * b21 + a13 * b31;
			te[3] = a11 * b12 + a12 * b22 + a13 * b32;
			te[6] = a11 * b13 + a12 * b23 + a13 * b33;
			te[1] = a21 * b11 + a22 * b21 + a23 * b31;
			te[4] = a21 * b12 + a22 * b22 + a23 * b32;
			te[7] = a21 * b13 + a22 * b23 + a23 * b33;
			te[2] = a31 * b11 + a32 * b21 + a33 * b31;
			te[5] = a31 * b12 + a32 * b22 + a33 * b32;
			te[8] = a31 * b13 + a32 * b23 + a33 * b33;
			return this;
		}

		multiplyScalar(s) {
			const te = this.elements;
			te[0] *= s;
			te[3] *= s;
			te[6] *= s;
			te[1] *= s;
			te[4] *= s;
			te[7] *= s;
			te[2] *= s;
			te[5] *= s;
			te[8] *= s;
			return this;
		}

		determinant() {
			const te = this.elements;
			const a = te[0],
						b = te[1],
						c = te[2],
						d = te[3],
						e = te[4],
						f = te[5],
						g = te[6],
						h = te[7],
						i = te[8];
			return a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g;
		}

		invert() {
			const te = this.elements,
						n11 = te[0],
						n21 = te[1],
						n31 = te[2],
						n12 = te[3],
						n22 = te[4],
						n32 = te[5],
						n13 = te[6],
						n23 = te[7],
						n33 = te[8],
						t11 = n33 * n22 - n32 * n23,
						t12 = n32 * n13 - n33 * n12,
						t13 = n23 * n12 - n22 * n13,
						det = n11 * t11 + n21 * t12 + n31 * t13;
			if (det === 0) return this.set(0, 0, 0, 0, 0, 0, 0, 0, 0);
			const detInv = 1 / det;
			te[0] = t11 * detInv;
			te[1] = (n31 * n23 - n33 * n21) * detInv;
			te[2] = (n32 * n21 - n31 * n22) * detInv;
			te[3] = t12 * detInv;
			te[4] = (n33 * n11 - n31 * n13) * detInv;
			te[5] = (n31 * n12 - n32 * n11) * detInv;
			te[6] = t13 * detInv;
			te[7] = (n21 * n13 - n23 * n11) * detInv;
			te[8] = (n22 * n11 - n21 * n12) * detInv;
			return this;
		}

		transpose() {
			let tmp;
			const m = this.elements;
			tmp = m[1];
			m[1] = m[3];
			m[3] = tmp;
			tmp = m[2];
			m[2] = m[6];
			m[6] = tmp;
			tmp = m[5];
			m[5] = m[7];
			m[7] = tmp;
			return this;
		}

		getNormalMatrix(matrix4) {
			return this.setFromMatrix4(matrix4).invert().transpose();
		}

		transposeIntoArray(r) {
			const m = this.elements;
			r[0] = m[0];
			r[1] = m[3];
			r[2] = m[6];
			r[3] = m[1];
			r[4] = m[4];
			r[5] = m[7];
			r[6] = m[2];
			r[7] = m[5];
			r[8] = m[8];
			return this;
		}

		setUvTransform(tx, ty, sx, sy, rotation, cx, cy) {
			const c = Math.cos(rotation);
			const s = Math.sin(rotation);
			this.set(sx * c, sx * s, -sx * (c * cx + s * cy) + cx + tx, -sy * s, sy * c, -sy * (-s * cx + c * cy) + cy + ty, 0, 0, 1);
			return this;
		}

		scale(sx, sy) {
			const te = this.elements;
			te[0] *= sx;
			te[3] *= sx;
			te[6] *= sx;
			te[1] *= sy;
			te[4] *= sy;
			te[7] *= sy;
			return this;
		}

		rotate(theta) {
			const c = Math.cos(theta);
			const s = Math.sin(theta);
			const te = this.elements;
			const a11 = te[0],
						a12 = te[3],
						a13 = te[6];
			const a21 = te[1],
						a22 = te[4],
						a23 = te[7];
			te[0] = c * a11 + s * a21;
			te[3] = c * a12 + s * a22;
			te[6] = c * a13 + s * a23;
			te[1] = -s * a11 + c * a21;
			te[4] = -s * a12 + c * a22;
			te[7] = -s * a13 + c * a23;
			return this;
		}

		translate(tx, ty) {
			const te = this.elements;
			te[0] += tx * te[2];
			te[3] += tx * te[5];
			te[6] += tx * te[8];
			te[1] += ty * te[2];
			te[4] += ty * te[5];
			te[7] += ty * te[8];
			return this;
		}

		equals(matrix) {
			const te = this.elements;
			const me = matrix.elements;

			for (let i = 0; i < 9; i++) {
				if (te[i] !== me[i]) return false;
			}

			return true;
		}

		fromArray(array, offset = 0) {
			for (let i = 0; i < 9; i++) {
				this.elements[i] = array[i + offset];
			}

			return this;
		}

		toArray(array = [], offset = 0) {
			const te = this.elements;
			array[offset] = te[0];
			array[offset + 1] = te[1];
			array[offset + 2] = te[2];
			array[offset + 3] = te[3];
			array[offset + 4] = te[4];
			array[offset + 5] = te[5];
			array[offset + 6] = te[6];
			array[offset + 7] = te[7];
			array[offset + 8] = te[8];
			return array;
		}

		clone() {
			return new this.constructor().fromArray(this.elements);
		}

	}

	function arrayNeedsUint32(array) {
		// assumes larger values usually on last
		for (let i = array.length - 1; i >= 0; --i) {
			if (array[i] > 65535) return true;
		}

		return false;
	}

	const TYPED_ARRAYS = {
		Int8Array: Int8Array,
		Uint8Array: Uint8Array,
		Uint8ClampedArray: Uint8ClampedArray,
		Int16Array: Int16Array,
		Uint16Array: Uint16Array,
		Int32Array: Int32Array,
		Uint32Array: Uint32Array,
		Float32Array: Float32Array,
		Float64Array: Float64Array
	};

	function getTypedArray(type, buffer) {
		return new TYPED_ARRAYS[type](buffer);
	}

	function createElementNS(name) {
		return document.createElementNS('http://www.w3.org/1999/xhtml', name);
	}

	function SRGBToLinear(c) {
		return c < 0.04045 ? c * 0.0773993808 : Math.pow(c * 0.9478672986 + 0.0521327014, 2.4);
	}
	function LinearToSRGB(c) {
		return c < 0.0031308 ? c * 12.92 : 1.055 * Math.pow(c, 0.41666) - 0.055;
	} // JavaScript RGB-to-RGB transforms, defined as
	// FN[InputColorSpace][OutputColorSpace] callback functions.

	const FN = {
		[SRGBColorSpace]: {
			[LinearSRGBColorSpace]: SRGBToLinear
		},
		[LinearSRGBColorSpace]: {
			[SRGBColorSpace]: LinearToSRGB
		}
	};
	const ColorManagement = {
		legacyMode: true,

		get workingColorSpace() {
			return LinearSRGBColorSpace;
		},

		set workingColorSpace(colorSpace) {
			console.warn('THREE.ColorManagement: .workingColorSpace is readonly.');
		},

		convert: function (color, sourceColorSpace, targetColorSpace) {
			if (this.legacyMode || sourceColorSpace === targetColorSpace || !sourceColorSpace || !targetColorSpace) {
				return color;
			}

			if (FN[sourceColorSpace] && FN[sourceColorSpace][targetColorSpace] !== undefined) {
				const fn = FN[sourceColorSpace][targetColorSpace];
				color.r = fn(color.r);
				color.g = fn(color.g);
				color.b = fn(color.b);
				return color;
			}

			throw new Error('Unsupported color space conversion.');
		},
		fromWorkingColorSpace: function (color, targetColorSpace) {
			return this.convert(color, this.workingColorSpace, targetColorSpace);
		},
		toWorkingColorSpace: function (color, sourceColorSpace) {
			return this.convert(color, sourceColorSpace, this.workingColorSpace);
		}
	};

	const _colorKeywords = {
		'aliceblue': 0xF0F8FF,
		'antiquewhite': 0xFAEBD7,
		'aqua': 0x00FFFF,
		'aquamarine': 0x7FFFD4,
		'azure': 0xF0FFFF,
		'beige': 0xF5F5DC,
		'bisque': 0xFFE4C4,
		'black': 0x000000,
		'blanchedalmond': 0xFFEBCD,
		'blue': 0x0000FF,
		'blueviolet': 0x8A2BE2,
		'brown': 0xA52A2A,
		'burlywood': 0xDEB887,
		'cadetblue': 0x5F9EA0,
		'chartreuse': 0x7FFF00,
		'chocolate': 0xD2691E,
		'coral': 0xFF7F50,
		'cornflowerblue': 0x6495ED,
		'cornsilk': 0xFFF8DC,
		'crimson': 0xDC143C,
		'cyan': 0x00FFFF,
		'darkblue': 0x00008B,
		'darkcyan': 0x008B8B,
		'darkgoldenrod': 0xB8860B,
		'darkgray': 0xA9A9A9,
		'darkgreen': 0x006400,
		'darkgrey': 0xA9A9A9,
		'darkkhaki': 0xBDB76B,
		'darkmagenta': 0x8B008B,
		'darkolivegreen': 0x556B2F,
		'darkorange': 0xFF8C00,
		'darkorchid': 0x9932CC,
		'darkred': 0x8B0000,
		'darksalmon': 0xE9967A,
		'darkseagreen': 0x8FBC8F,
		'darkslateblue': 0x483D8B,
		'darkslategray': 0x2F4F4F,
		'darkslategrey': 0x2F4F4F,
		'darkturquoise': 0x00CED1,
		'darkviolet': 0x9400D3,
		'deeppink': 0xFF1493,
		'deepskyblue': 0x00BFFF,
		'dimgray': 0x696969,
		'dimgrey': 0x696969,
		'dodgerblue': 0x1E90FF,
		'firebrick': 0xB22222,
		'floralwhite': 0xFFFAF0,
		'forestgreen': 0x228B22,
		'fuchsia': 0xFF00FF,
		'gainsboro': 0xDCDCDC,
		'ghostwhite': 0xF8F8FF,
		'gold': 0xFFD700,
		'goldenrod': 0xDAA520,
		'gray': 0x808080,
		'green': 0x008000,
		'greenyellow': 0xADFF2F,
		'grey': 0x808080,
		'honeydew': 0xF0FFF0,
		'hotpink': 0xFF69B4,
		'indianred': 0xCD5C5C,
		'indigo': 0x4B0082,
		'ivory': 0xFFFFF0,
		'khaki': 0xF0E68C,
		'lavender': 0xE6E6FA,
		'lavenderblush': 0xFFF0F5,
		'lawngreen': 0x7CFC00,
		'lemonchiffon': 0xFFFACD,
		'lightblue': 0xADD8E6,
		'lightcoral': 0xF08080,
		'lightcyan': 0xE0FFFF,
		'lightgoldenrodyellow': 0xFAFAD2,
		'lightgray': 0xD3D3D3,
		'lightgreen': 0x90EE90,
		'lightgrey': 0xD3D3D3,
		'lightpink': 0xFFB6C1,
		'lightsalmon': 0xFFA07A,
		'lightseagreen': 0x20B2AA,
		'lightskyblue': 0x87CEFA,
		'lightslategray': 0x778899,
		'lightslategrey': 0x778899,
		'lightsteelblue': 0xB0C4DE,
		'lightyellow': 0xFFFFE0,
		'lime': 0x00FF00,
		'limegreen': 0x32CD32,
		'linen': 0xFAF0E6,
		'magenta': 0xFF00FF,
		'maroon': 0x800000,
		'mediumaquamarine': 0x66CDAA,
		'mediumblue': 0x0000CD,
		'mediumorchid': 0xBA55D3,
		'mediumpurple': 0x9370DB,
		'mediumseagreen': 0x3CB371,
		'mediumslateblue': 0x7B68EE,
		'mediumspringgreen': 0x00FA9A,
		'mediumturquoise': 0x48D1CC,
		'mediumvioletred': 0xC71585,
		'midnightblue': 0x191970,
		'mintcream': 0xF5FFFA,
		'mistyrose': 0xFFE4E1,
		'moccasin': 0xFFE4B5,
		'navajowhite': 0xFFDEAD,
		'navy': 0x000080,
		'oldlace': 0xFDF5E6,
		'olive': 0x808000,
		'olivedrab': 0x6B8E23,
		'orange': 0xFFA500,
		'orangered': 0xFF4500,
		'orchid': 0xDA70D6,
		'palegoldenrod': 0xEEE8AA,
		'palegreen': 0x98FB98,
		'paleturquoise': 0xAFEEEE,
		'palevioletred': 0xDB7093,
		'papayawhip': 0xFFEFD5,
		'peachpuff': 0xFFDAB9,
		'peru': 0xCD853F,
		'pink': 0xFFC0CB,
		'plum': 0xDDA0DD,
		'powderblue': 0xB0E0E6,
		'purple': 0x800080,
		'rebeccapurple': 0x663399,
		'red': 0xFF0000,
		'rosybrown': 0xBC8F8F,
		'royalblue': 0x4169E1,
		'saddlebrown': 0x8B4513,
		'salmon': 0xFA8072,
		'sandybrown': 0xF4A460,
		'seagreen': 0x2E8B57,
		'seashell': 0xFFF5EE,
		'sienna': 0xA0522D,
		'silver': 0xC0C0C0,
		'skyblue': 0x87CEEB,
		'slateblue': 0x6A5ACD,
		'slategray': 0x708090,
		'slategrey': 0x708090,
		'snow': 0xFFFAFA,
		'springgreen': 0x00FF7F,
		'steelblue': 0x4682B4,
		'tan': 0xD2B48C,
		'teal': 0x008080,
		'thistle': 0xD8BFD8,
		'tomato': 0xFF6347,
		'turquoise': 0x40E0D0,
		'violet': 0xEE82EE,
		'wheat': 0xF5DEB3,
		'white': 0xFFFFFF,
		'whitesmoke': 0xF5F5F5,
		'yellow': 0xFFFF00,
		'yellowgreen': 0x9ACD32
	};
	const _rgb = {
		r: 0,
		g: 0,
		b: 0
	};
	const _hslA = {
		h: 0,
		s: 0,
		l: 0
	};
	const _hslB = {
		h: 0,
		s: 0,
		l: 0
	};

	function hue2rgb(p, q, t) {
		if (t < 0) t += 1;
		if (t > 1) t -= 1;
		if (t < 1 / 6) return p + (q - p) * 6 * t;
		if (t < 1 / 2) return q;
		if (t < 2 / 3) return p + (q - p) * 6 * (2 / 3 - t);
		return p;
	}

	function toComponents(source, target) {
		target.r = source.r;
		target.g = source.g;
		target.b = source.b;
		return target;
	}

	class Color {
		constructor(r, g, b) {
			this.isColor = true;
			this.r = 1;
			this.g = 1;
			this.b = 1;

			if (g === undefined && b === undefined) {
				// r is THREE.Color, hex or string
				return this.set(r);
			}

			return this.setRGB(r, g, b);
		}

		set(value) {
			if (value && value.isColor) {
				this.copy(value);
			} else if (typeof value === 'number') {
				this.setHex(value);
			} else if (typeof value === 'string') {
				this.setStyle(value);
			}

			return this;
		}

		setScalar(scalar) {
			this.r = scalar;
			this.g = scalar;
			this.b = scalar;
			return this;
		}

		setHex(hex, colorSpace = SRGBColorSpace) {
			hex = Math.floor(hex);
			this.r = (hex >> 16 & 255) / 255;
			this.g = (hex >> 8 & 255) / 255;
			this.b = (hex & 255) / 255;
			ColorManagement.toWorkingColorSpace(this, colorSpace);
			return this;
		}

		setRGB(r, g, b, colorSpace = LinearSRGBColorSpace) {
			this.r = r;
			this.g = g;
			this.b = b;
			ColorManagement.toWorkingColorSpace(this, colorSpace);
			return this;
		}

		setHSL(h, s, l, colorSpace = LinearSRGBColorSpace) {
			// h,s,l ranges are in 0.0 - 1.0
			h = euclideanModulo(h, 1);
			s = clamp(s, 0, 1);
			l = clamp(l, 0, 1);

			if (s === 0) {
				this.r = this.g = this.b = l;
			} else {
				const p = l <= 0.5 ? l * (1 + s) : l + s - l * s;
				const q = 2 * l - p;
				this.r = hue2rgb(q, p, h + 1 / 3);
				this.g = hue2rgb(q, p, h);
				this.b = hue2rgb(q, p, h - 1 / 3);
			}

			ColorManagement.toWorkingColorSpace(this, colorSpace);
			return this;
		}

		setStyle(style, colorSpace = SRGBColorSpace) {
			function handleAlpha(string) {
				if (string === undefined) return;

				if (parseFloat(string) < 1) {
					console.warn('THREE.Color: Alpha component of ' + style + ' will be ignored.');
				}
			}

			let m;

			if (m = /^((?:rgb|hsl)a?)\(([^\)]*)\)/.exec(style)) {
				// rgb / hsl
				let color;
				const name = m[1];
				const components = m[2];

				switch (name) {
					case 'rgb':
					case 'rgba':
						if (color = /^\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
							// rgb(255,0,0) rgba(255,0,0,0.5)
							this.r = Math.min(255, parseInt(color[1], 10)) / 255;
							this.g = Math.min(255, parseInt(color[2], 10)) / 255;
							this.b = Math.min(255, parseInt(color[3], 10)) / 255;
							ColorManagement.toWorkingColorSpace(this, colorSpace);
							handleAlpha(color[4]);
							return this;
						}

						if (color = /^\s*(\d+)\%\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
							// rgb(100%,0%,0%) rgba(100%,0%,0%,0.5)
							this.r = Math.min(100, parseInt(color[1], 10)) / 100;
							this.g = Math.min(100, parseInt(color[2], 10)) / 100;
							this.b = Math.min(100, parseInt(color[3], 10)) / 100;
							ColorManagement.toWorkingColorSpace(this, colorSpace);
							handleAlpha(color[4]);
							return this;
						}

						break;

					case 'hsl':
					case 'hsla':
						if (color = /^\s*(\d*\.?\d+)\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
							// hsl(120,50%,50%) hsla(120,50%,50%,0.5)
							const h = parseFloat(color[1]) / 360;
							const s = parseInt(color[2], 10) / 100;
							const l = parseInt(color[3], 10) / 100;
							handleAlpha(color[4]);
							return this.setHSL(h, s, l, colorSpace);
						}

						break;
				}
			} else if (m = /^\#([A-Fa-f\d]+)$/.exec(style)) {
				// hex color
				const hex = m[1];
				const size = hex.length;

				if (size === 3) {
					// #ff0
					this.r = parseInt(hex.charAt(0) + hex.charAt(0), 16) / 255;
					this.g = parseInt(hex.charAt(1) + hex.charAt(1), 16) / 255;
					this.b = parseInt(hex.charAt(2) + hex.charAt(2), 16) / 255;
					ColorManagement.toWorkingColorSpace(this, colorSpace);
					return this;
				} else if (size === 6) {
					// #ff0000
					this.r = parseInt(hex.charAt(0) + hex.charAt(1), 16) / 255;
					this.g = parseInt(hex.charAt(2) + hex.charAt(3), 16) / 255;
					this.b = parseInt(hex.charAt(4) + hex.charAt(5), 16) / 255;
					ColorManagement.toWorkingColorSpace(this, colorSpace);
					return this;
				}
			}

			if (style && style.length > 0) {
				return this.setColorName(style, colorSpace);
			}

			return this;
		}

		setColorName(style, colorSpace = SRGBColorSpace) {
			// color keywords
			const hex = _colorKeywords[style.toLowerCase()];

			if (hex !== undefined) {
				// red
				this.setHex(hex, colorSpace);
			} else {
				// unknown color
				console.warn('THREE.Color: Unknown color ' + style);
			}

			return this;
		}

		clone() {
			return new this.constructor(this.r, this.g, this.b);
		}

		copy(color) {
			this.r = color.r;
			this.g = color.g;
			this.b = color.b;
			return this;
		}

		copySRGBToLinear(color) {
			this.r = SRGBToLinear(color.r);
			this.g = SRGBToLinear(color.g);
			this.b = SRGBToLinear(color.b);
			return this;
		}

		copyLinearToSRGB(color) {
			this.r = LinearToSRGB(color.r);
			this.g = LinearToSRGB(color.g);
			this.b = LinearToSRGB(color.b);
			return this;
		}

		convertSRGBToLinear() {
			this.copySRGBToLinear(this);
			return this;
		}

		convertLinearToSRGB() {
			this.copyLinearToSRGB(this);
			return this;
		}

		getHex(colorSpace = SRGBColorSpace) {
			ColorManagement.fromWorkingColorSpace(toComponents(this, _rgb), colorSpace);
			return clamp(_rgb.r * 255, 0, 255) << 16 ^ clamp(_rgb.g * 255, 0, 255) << 8 ^ clamp(_rgb.b * 255, 0, 255) << 0;
		}

		getHexString(colorSpace = SRGBColorSpace) {
			return ('000000' + this.getHex(colorSpace).toString(16)).slice(-6);
		}

		getHSL(target, colorSpace = LinearSRGBColorSpace) {
			// h,s,l ranges are in 0.0 - 1.0
			ColorManagement.fromWorkingColorSpace(toComponents(this, _rgb), colorSpace);
			const r = _rgb.r,
						g = _rgb.g,
						b = _rgb.b;
			const max = Math.max(r, g, b);
			const min = Math.min(r, g, b);
			let hue, saturation;
			const lightness = (min + max) / 2.0;

			if (min === max) {
				hue = 0;
				saturation = 0;
			} else {
				const delta = max - min;
				saturation = lightness <= 0.5 ? delta / (max + min) : delta / (2 - max - min);

				switch (max) {
					case r:
						hue = (g - b) / delta + (g < b ? 6 : 0);
						break;

					case g:
						hue = (b - r) / delta + 2;
						break;

					case b:
						hue = (r - g) / delta + 4;
						break;
				}

				hue /= 6;
			}

			target.h = hue;
			target.s = saturation;
			target.l = lightness;
			return target;
		}

		getRGB(target, colorSpace = LinearSRGBColorSpace) {
			ColorManagement.fromWorkingColorSpace(toComponents(this, _rgb), colorSpace);
			target.r = _rgb.r;
			target.g = _rgb.g;
			target.b = _rgb.b;
			return target;
		}

		getStyle(colorSpace = SRGBColorSpace) {
			ColorManagement.fromWorkingColorSpace(toComponents(this, _rgb), colorSpace);

			if (colorSpace !== SRGBColorSpace) {
				// Requires CSS Color Module Level 4 (https://www.w3.org/TR/css-color-4/).
				return `color(${colorSpace} ${_rgb.r} ${_rgb.g} ${_rgb.b})`;
			}

			return `rgb(${_rgb.r * 255 | 0},${_rgb.g * 255 | 0},${_rgb.b * 255 | 0})`;
		}

		offsetHSL(h, s, l) {
			this.getHSL(_hslA);
			_hslA.h += h;
			_hslA.s += s;
			_hslA.l += l;
			this.setHSL(_hslA.h, _hslA.s, _hslA.l);
			return this;
		}

		add(color) {
			this.r += color.r;
			this.g += color.g;
			this.b += color.b;
			return this;
		}

		addColors(color1, color2) {
			this.r = color1.r + color2.r;
			this.g = color1.g + color2.g;
			this.b = color1.b + color2.b;
			return this;
		}

		addScalar(s) {
			this.r += s;
			this.g += s;
			this.b += s;
			return this;
		}

		sub(color) {
			this.r = Math.max(0, this.r - color.r);
			this.g = Math.max(0, this.g - color.g);
			this.b = Math.max(0, this.b - color.b);
			return this;
		}

		multiply(color) {
			this.r *= color.r;
			this.g *= color.g;
			this.b *= color.b;
			return this;
		}

		multiplyScalar(s) {
			this.r *= s;
			this.g *= s;
			this.b *= s;
			return this;
		}

		lerp(color, alpha) {
			this.r += (color.r - this.r) * alpha;
			this.g += (color.g - this.g) * alpha;
			this.b += (color.b - this.b) * alpha;
			return this;
		}

		lerpColors(color1, color2, alpha) {
			this.r = color1.r + (color2.r - color1.r) * alpha;
			this.g = color1.g + (color2.g - color1.g) * alpha;
			this.b = color1.b + (color2.b - color1.b) * alpha;
			return this;
		}

		lerpHSL(color, alpha) {
			this.getHSL(_hslA);
			color.getHSL(_hslB);
			const h = lerp(_hslA.h, _hslB.h, alpha);
			const s = lerp(_hslA.s, _hslB.s, alpha);
			const l = lerp(_hslA.l, _hslB.l, alpha);
			this.setHSL(h, s, l);
			return this;
		}

		equals(c) {
			return c.r === this.r && c.g === this.g && c.b === this.b;
		}

		fromArray(array, offset = 0) {
			this.r = array[offset];
			this.g = array[offset + 1];
			this.b = array[offset + 2];
			return this;
		}

		toArray(array = [], offset = 0) {
			array[offset] = this.r;
			array[offset + 1] = this.g;
			array[offset + 2] = this.b;
			return array;
		}

		fromBufferAttribute(attribute, index) {
			this.r = attribute.getX(index);
			this.g = attribute.getY(index);
			this.b = attribute.getZ(index);

			if (attribute.normalized === true) {
				// assuming Uint8Array
				this.r /= 255;
				this.g /= 255;
				this.b /= 255;
			}

			return this;
		}

		toJSON() {
			return this.getHex();
		}

		*[Symbol.iterator]() {
			yield this.r;
			yield this.g;
			yield this.b;
		}

	}

	Color.NAMES = _colorKeywords;

	let _canvas;

	class ImageUtils {
		static getDataURL(image) {
			if (/^data:/i.test(image.src)) {
				return image.src;
			}

			if (typeof HTMLCanvasElement == 'undefined') {
				return image.src;
			}

			let canvas;

			if (image instanceof HTMLCanvasElement) {
				canvas = image;
			} else {
				if (_canvas === undefined) _canvas = createElementNS('canvas');
				_canvas.width = image.width;
				_canvas.height = image.height;

				const context = _canvas.getContext('2d');

				if (image instanceof ImageData) {
					context.putImageData(image, 0, 0);
				} else {
					context.drawImage(image, 0, 0, image.width, image.height);
				}

				canvas = _canvas;
			}

			if (canvas.width > 2048 || canvas.height > 2048) {
				console.warn('THREE.ImageUtils.getDataURL: Image converted to jpg for performance reasons', image);
				return canvas.toDataURL('image/jpeg', 0.6);
			} else {
				return canvas.toDataURL('image/png');
			}
		}

		static sRGBToLinear(image) {
			if (typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement || typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap) {
				const canvas = createElementNS('canvas');
				canvas.width = image.width;
				canvas.height = image.height;
				const context = canvas.getContext('2d');
				context.drawImage(image, 0, 0, image.width, image.height);
				const imageData = context.getImageData(0, 0, image.width, image.height);
				const data = imageData.data;

				for (let i = 0; i < data.length; i++) {
					data[i] = SRGBToLinear(data[i] / 255) * 255;
				}

				context.putImageData(imageData, 0, 0);
				return canvas;
			} else if (image.data) {
				const data = image.data.slice(0);

				for (let i = 0; i < data.length; i++) {
					if (data instanceof Uint8Array || data instanceof Uint8ClampedArray) {
						data[i] = Math.floor(SRGBToLinear(data[i] / 255) * 255);
					} else {
						// assuming float
						data[i] = SRGBToLinear(data[i]);
					}
				}

				return {
					data: data,
					width: image.width,
					height: image.height
				};
			} else {
				console.warn('THREE.ImageUtils.sRGBToLinear(): Unsupported image type. No color space conversion applied.');
				return image;
			}
		}

	}

	class Source {
		constructor(data = null) {
			this.isSource = true;
			this.uuid = generateUUID();
			this.data = data;
			this.version = 0;
		}

		set needsUpdate(value) {
			if (value === true) this.version++;
		}

		toJSON(meta) {
			const isRootObject = meta === undefined || typeof meta === 'string';

			if (!isRootObject && meta.images[this.uuid] !== undefined) {
				return meta.images[this.uuid];
			}

			const output = {
				uuid: this.uuid,
				url: ''
			};
			const data = this.data;

			if (data !== null) {
				let url;

				if (Array.isArray(data)) {
					// cube texture
					url = [];

					for (let i = 0, l = data.length; i < l; i++) {
						if (data[i].isDataTexture) {
							url.push(serializeImage(data[i].image));
						} else {
							url.push(serializeImage(data[i]));
						}
					}
				} else {
					// texture
					url = serializeImage(data);
				}

				output.url = url;
			}

			if (!isRootObject) {
				meta.images[this.uuid] = output;
			}

			return output;
		}

	}

	function serializeImage(image) {
		if (typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement || typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap) {
			// default images
			return ImageUtils.getDataURL(image);
		} else {
			if (image.data) {
				// images of DataTexture
				return {
					data: Array.from(image.data),
					width: image.width,
					height: image.height,
					type: image.data.constructor.name
				};
			} else {
				console.warn('THREE.Texture: Unable to serialize Texture.');
				return {};
			}
		}
	}

	let textureId = 0;

	class Texture extends EventDispatcher {
		constructor(image = Texture.DEFAULT_IMAGE, mapping = Texture.DEFAULT_MAPPING, wrapS = ClampToEdgeWrapping, wrapT = ClampToEdgeWrapping, magFilter = LinearFilter, minFilter = LinearMipmapLinearFilter, format = RGBAFormat, type = UnsignedByteType, anisotropy = 1, encoding = LinearEncoding) {
			super();
			this.isTexture = true;
			Object.defineProperty(this, 'id', {
				value: textureId++
			});
			this.uuid = generateUUID();
			this.name = '';
			this.source = new Source(image);
			this.mipmaps = [];
			this.mapping = mapping;
			this.wrapS = wrapS;
			this.wrapT = wrapT;
			this.magFilter = magFilter;
			this.minFilter = minFilter;
			this.anisotropy = anisotropy;
			this.format = format;
			this.internalFormat = null;
			this.type = type;
			this.offset = new Vector2(0, 0);
			this.repeat = new Vector2(1, 1);
			this.center = new Vector2(0, 0);
			this.rotation = 0;
			this.matrixAutoUpdate = true;
			this.matrix = new Matrix3();
			this.generateMipmaps = true;
			this.premultiplyAlpha = false;
			this.flipY = true;
			this.unpackAlignment = 4; // valid values: 1, 2, 4, 8 (see http://www.khronos.org/opengles/sdk/docs/man/xhtml/glPixelStorei.xml)
			// Values of encoding !== THREE.LinearEncoding only supported on map, envMap and emissiveMap.
			//
			// Also changing the encoding after already used by a Material will not automatically make the Material
			// update. You need to explicitly call Material.needsUpdate to trigger it to recompile.

			this.encoding = encoding;
			this.userData = {};
			this.version = 0;
			this.onUpdate = null;
			this.isRenderTargetTexture = false; // indicates whether a texture belongs to a render target or not

			this.needsPMREMUpdate = false; // indicates whether this texture should be processed by PMREMGenerator or not (only relevant for render target textures)
		}

		get image() {
			return this.source.data;
		}

		set image(value) {
			this.source.data = value;
		}

		updateMatrix() {
			this.matrix.setUvTransform(this.offset.x, this.offset.y, this.repeat.x, this.repeat.y, this.rotation, this.center.x, this.center.y);
		}

		clone() {
			return new this.constructor().copy(this);
		}

		copy(source) {
			this.name = source.name;
			this.source = source.source;
			this.mipmaps = source.mipmaps.slice(0);
			this.mapping = source.mapping;
			this.wrapS = source.wrapS;
			this.wrapT = source.wrapT;
			this.magFilter = source.magFilter;
			this.minFilter = source.minFilter;
			this.anisotropy = source.anisotropy;
			this.format = source.format;
			this.internalFormat = source.internalFormat;
			this.type = source.type;
			this.offset.copy(source.offset);
			this.repeat.copy(source.repeat);
			this.center.copy(source.center);
			this.rotation = source.rotation;
			this.matrixAutoUpdate = source.matrixAutoUpdate;
			this.matrix.copy(source.matrix);
			this.generateMipmaps = source.generateMipmaps;
			this.premultiplyAlpha = source.premultiplyAlpha;
			this.flipY = source.flipY;
			this.unpackAlignment = source.unpackAlignment;
			this.encoding = source.encoding;
			this.userData = JSON.parse(JSON.stringify(source.userData));
			this.needsUpdate = true;
			return this;
		}

		toJSON(meta) {
			const isRootObject = meta === undefined || typeof meta === 'string';

			if (!isRootObject && meta.textures[this.uuid] !== undefined) {
				return meta.textures[this.uuid];
			}

			const output = {
				metadata: {
					version: 4.5,
					type: 'Texture',
					generator: 'Texture.toJSON'
				},
				uuid: this.uuid,
				name: this.name,
				image: this.source.toJSON(meta).uuid,
				mapping: this.mapping,
				repeat: [this.repeat.x, this.repeat.y],
				offset: [this.offset.x, this.offset.y],
				center: [this.center.x, this.center.y],
				rotation: this.rotation,
				wrap: [this.wrapS, this.wrapT],
				format: this.format,
				type: this.type,
				encoding: this.encoding,
				minFilter: this.minFilter,
				magFilter: this.magFilter,
				anisotropy: this.anisotropy,
				flipY: this.flipY,
				premultiplyAlpha: this.premultiplyAlpha,
				unpackAlignment: this.unpackAlignment
			};
			if (JSON.stringify(this.userData) !== '{}') output.userData = this.userData;

			if (!isRootObject) {
				meta.textures[this.uuid] = output;
			}

			return output;
		}

		dispose() {
			this.dispatchEvent({
				type: 'dispose'
			});
		}

		transformUv(uv) {
			if (this.mapping !== UVMapping) return uv;
			uv.applyMatrix3(this.matrix);

			if (uv.x < 0 || uv.x > 1) {
				switch (this.wrapS) {
					case RepeatWrapping:
						uv.x = uv.x - Math.floor(uv.x);
						break;

					case ClampToEdgeWrapping:
						uv.x = uv.x < 0 ? 0 : 1;
						break;

					case MirroredRepeatWrapping:
						if (Math.abs(Math.floor(uv.x) % 2) === 1) {
							uv.x = Math.ceil(uv.x) - uv.x;
						} else {
							uv.x = uv.x - Math.floor(uv.x);
						}

						break;
				}
			}

			if (uv.y < 0 || uv.y > 1) {
				switch (this.wrapT) {
					case RepeatWrapping:
						uv.y = uv.y - Math.floor(uv.y);
						break;

					case ClampToEdgeWrapping:
						uv.y = uv.y < 0 ? 0 : 1;
						break;

					case MirroredRepeatWrapping:
						if (Math.abs(Math.floor(uv.y) % 2) === 1) {
							uv.y = Math.ceil(uv.y) - uv.y;
						} else {
							uv.y = uv.y - Math.floor(uv.y);
						}

						break;
				}
			}

			if (this.flipY) {
				uv.y = 1 - uv.y;
			}

			return uv;
		}

		set needsUpdate(value) {
			if (value === true) {
				this.version++;
				this.source.needsUpdate = true;
			}
		}

	}

	Texture.DEFAULT_IMAGE = null;
	Texture.DEFAULT_MAPPING = UVMapping;

	class Vector4 {
		constructor(x = 0, y = 0, z = 0, w = 1) {
			Vector4.prototype.isVector4 = true;
			this.x = x;
			this.y = y;
			this.z = z;
			this.w = w;
		}

		get width() {
			return this.z;
		}

		set width(value) {
			this.z = value;
		}

		get height() {
			return this.w;
		}

		set height(value) {
			this.w = value;
		}

		set(x, y, z, w) {
			this.x = x;
			this.y = y;
			this.z = z;
			this.w = w;
			return this;
		}

		setScalar(scalar) {
			this.x = scalar;
			this.y = scalar;
			this.z = scalar;
			this.w = scalar;
			return this;
		}

		setX(x) {
			this.x = x;
			return this;
		}

		setY(y) {
			this.y = y;
			return this;
		}

		setZ(z) {
			this.z = z;
			return this;
		}

		setW(w) {
			this.w = w;
			return this;
		}

		setComponent(index, value) {
			switch (index) {
				case 0:
					this.x = value;
					break;

				case 1:
					this.y = value;
					break;

				case 2:
					this.z = value;
					break;

				case 3:
					this.w = value;
					break;

				default:
					throw new Error('index is out of range: ' + index);
			}

			return this;
		}

		getComponent(index) {
			switch (index) {
				case 0:
					return this.x;

				case 1:
					return this.y;

				case 2:
					return this.z;

				case 3:
					return this.w;

				default:
					throw new Error('index is out of range: ' + index);
			}
		}

		clone() {
			return new this.constructor(this.x, this.y, this.z, this.w);
		}

		copy(v) {
			this.x = v.x;
			this.y = v.y;
			this.z = v.z;
			this.w = v.w !== undefined ? v.w : 1;
			return this;
		}

		add(v) {
			this.x += v.x;
			this.y += v.y;
			this.z += v.z;
			this.w += v.w;
			return this;
		}

		addScalar(s) {
			this.x += s;
			this.y += s;
			this.z += s;
			this.w += s;
			return this;
		}

		addVectors(a, b) {
			this.x = a.x + b.x;
			this.y = a.y + b.y;
			this.z = a.z + b.z;
			this.w = a.w + b.w;
			return this;
		}

		addScaledVector(v, s) {
			this.x += v.x * s;
			this.y += v.y * s;
			this.z += v.z * s;
			this.w += v.w * s;
			return this;
		}

		sub(v) {
			this.x -= v.x;
			this.y -= v.y;
			this.z -= v.z;
			this.w -= v.w;
			return this;
		}

		subScalar(s) {
			this.x -= s;
			this.y -= s;
			this.z -= s;
			this.w -= s;
			return this;
		}

		subVectors(a, b) {
			this.x = a.x - b.x;
			this.y = a.y - b.y;
			this.z = a.z - b.z;
			this.w = a.w - b.w;
			return this;
		}

		multiply(v) {
			this.x *= v.x;
			this.y *= v.y;
			this.z *= v.z;
			this.w *= v.w;
			return this;
		}

		multiplyScalar(scalar) {
			this.x *= scalar;
			this.y *= scalar;
			this.z *= scalar;
			this.w *= scalar;
			return this;
		}

		applyMatrix4(m) {
			const x = this.x,
						y = this.y,
						z = this.z,
						w = this.w;
			const e = m.elements;
			this.x = e[0] * x + e[4] * y + e[8] * z + e[12] * w;
			this.y = e[1] * x + e[5] * y + e[9] * z + e[13] * w;
			this.z = e[2] * x + e[6] * y + e[10] * z + e[14] * w;
			this.w = e[3] * x + e[7] * y + e[11] * z + e[15] * w;
			return this;
		}

		divideScalar(scalar) {
			return this.multiplyScalar(1 / scalar);
		}

		setAxisAngleFromQuaternion(q) {
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/index.htm
			// q is assumed to be normalized
			this.w = 2 * Math.acos(q.w);
			const s = Math.sqrt(1 - q.w * q.w);

			if (s < 0.0001) {
				this.x = 1;
				this.y = 0;
				this.z = 0;
			} else {
				this.x = q.x / s;
				this.y = q.y / s;
				this.z = q.z / s;
			}

			return this;
		}

		setAxisAngleFromRotationMatrix(m) {
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm
			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)
			let angle, x, y, z; // variables for result

			const epsilon = 0.01,
						// margin to allow for rounding errors
			epsilon2 = 0.1,
						// margin to distinguish between 0 and 180 degrees
			te = m.elements,
						m11 = te[0],
						m12 = te[4],
						m13 = te[8],
						m21 = te[1],
						m22 = te[5],
						m23 = te[9],
						m31 = te[2],
						m32 = te[6],
						m33 = te[10];

			if (Math.abs(m12 - m21) < epsilon && Math.abs(m13 - m31) < epsilon && Math.abs(m23 - m32) < epsilon) {
				// singularity found
				// first check for identity matrix which must have +1 for all terms
				// in leading diagonal and zero in other terms
				if (Math.abs(m12 + m21) < epsilon2 && Math.abs(m13 + m31) < epsilon2 && Math.abs(m23 + m32) < epsilon2 && Math.abs(m11 + m22 + m33 - 3) < epsilon2) {
					// this singularity is identity matrix so angle = 0
					this.set(1, 0, 0, 0);
					return this; // zero angle, arbitrary axis
				} // otherwise this singularity is angle = 180


				angle = Math.PI;
				const xx = (m11 + 1) / 2;
				const yy = (m22 + 1) / 2;
				const zz = (m33 + 1) / 2;
				const xy = (m12 + m21) / 4;
				const xz = (m13 + m31) / 4;
				const yz = (m23 + m32) / 4;

				if (xx > yy && xx > zz) {
					// m11 is the largest diagonal term
					if (xx < epsilon) {
						x = 0;
						y = 0.707106781;
						z = 0.707106781;
					} else {
						x = Math.sqrt(xx);
						y = xy / x;
						z = xz / x;
					}
				} else if (yy > zz) {
					// m22 is the largest diagonal term
					if (yy < epsilon) {
						x = 0.707106781;
						y = 0;
						z = 0.707106781;
					} else {
						y = Math.sqrt(yy);
						x = xy / y;
						z = yz / y;
					}
				} else {
					// m33 is the largest diagonal term so base result on this
					if (zz < epsilon) {
						x = 0.707106781;
						y = 0.707106781;
						z = 0;
					} else {
						z = Math.sqrt(zz);
						x = xz / z;
						y = yz / z;
					}
				}

				this.set(x, y, z, angle);
				return this; // return 180 deg rotation
			} // as we have reached here there are no singularities so we can handle normally


			let s = Math.sqrt((m32 - m23) * (m32 - m23) + (m13 - m31) * (m13 - m31) + (m21 - m12) * (m21 - m12)); // used to normalize

			if (Math.abs(s) < 0.001) s = 1; // prevent divide by zero, should not happen if matrix is orthogonal and should be
			// caught by singularity test above, but I've left it in just in case

			this.x = (m32 - m23) / s;
			this.y = (m13 - m31) / s;
			this.z = (m21 - m12) / s;
			this.w = Math.acos((m11 + m22 + m33 - 1) / 2);
			return this;
		}

		min(v) {
			this.x = Math.min(this.x, v.x);
			this.y = Math.min(this.y, v.y);
			this.z = Math.min(this.z, v.z);
			this.w = Math.min(this.w, v.w);
			return this;
		}

		max(v) {
			this.x = Math.max(this.x, v.x);
			this.y = Math.max(this.y, v.y);
			this.z = Math.max(this.z, v.z);
			this.w = Math.max(this.w, v.w);
			return this;
		}

		clamp(min, max) {
			// assumes min < max, componentwise
			this.x = Math.max(min.x, Math.min(max.x, this.x));
			this.y = Math.max(min.y, Math.min(max.y, this.y));
			this.z = Math.max(min.z, Math.min(max.z, this.z));
			this.w = Math.max(min.w, Math.min(max.w, this.w));
			return this;
		}

		clampScalar(minVal, maxVal) {
			this.x = Math.max(minVal, Math.min(maxVal, this.x));
			this.y = Math.max(minVal, Math.min(maxVal, this.y));
			this.z = Math.max(minVal, Math.min(maxVal, this.z));
			this.w = Math.max(minVal, Math.min(maxVal, this.w));
			return this;
		}

		clampLength(min, max) {
			const length = this.length();
			return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max, length)));
		}

		floor() {
			this.x = Math.floor(this.x);
			this.y = Math.floor(this.y);
			this.z = Math.floor(this.z);
			this.w = Math.floor(this.w);
			return this;
		}

		ceil() {
			this.x = Math.ceil(this.x);
			this.y = Math.ceil(this.y);
			this.z = Math.ceil(this.z);
			this.w = Math.ceil(this.w);
			return this;
		}

		round() {
			this.x = Math.round(this.x);
			this.y = Math.round(this.y);
			this.z = Math.round(this.z);
			this.w = Math.round(this.w);
			return this;
		}

		roundToZero() {
			this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);
			this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);
			this.z = this.z < 0 ? Math.ceil(this.z) : Math.floor(this.z);
			this.w = this.w < 0 ? Math.ceil(this.w) : Math.floor(this.w);
			return this;
		}

		negate() {
			this.x = -this.x;
			this.y = -this.y;
			this.z = -this.z;
			this.w = -this.w;
			return this;
		}

		dot(v) {
			return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;
		}

		lengthSq() {
			return this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w;
		}

		length() {
			return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w);
		}

		manhattanLength() {
			return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z) + Math.abs(this.w);
		}

		normalize() {
			return this.divideScalar(this.length() || 1);
		}

		setLength(length) {
			return this.normalize().multiplyScalar(length);
		}

		lerp(v, alpha) {
			this.x += (v.x - this.x) * alpha;
			this.y += (v.y - this.y) * alpha;
			this.z += (v.z - this.z) * alpha;
			this.w += (v.w - this.w) * alpha;
			return this;
		}

		lerpVectors(v1, v2, alpha) {
			this.x = v1.x + (v2.x - v1.x) * alpha;
			this.y = v1.y + (v2.y - v1.y) * alpha;
			this.z = v1.z + (v2.z - v1.z) * alpha;
			this.w = v1.w + (v2.w - v1.w) * alpha;
			return this;
		}

		equals(v) {
			return v.x === this.x && v.y === this.y && v.z === this.z && v.w === this.w;
		}

		fromArray(array, offset = 0) {
			this.x = array[offset];
			this.y = array[offset + 1];
			this.z = array[offset + 2];
			this.w = array[offset + 3];
			return this;
		}

		toArray(array = [], offset = 0) {
			array[offset] = this.x;
			array[offset + 1] = this.y;
			array[offset + 2] = this.z;
			array[offset + 3] = this.w;
			return array;
		}

		fromBufferAttribute(attribute, index) {
			this.x = attribute.getX(index);
			this.y = attribute.getY(index);
			this.z = attribute.getZ(index);
			this.w = attribute.getW(index);
			return this;
		}

		random() {
			this.x = Math.random();
			this.y = Math.random();
			this.z = Math.random();
			this.w = Math.random();
			return this;
		}

		*[Symbol.iterator]() {
			yield this.x;
			yield this.y;
			yield this.z;
			yield this.w;
		}

	}

	/*
	 In options, we can specify:
	 * Texture parameters for an auto-generated target texture
	 * depthBuffer/stencilBuffer: Booleans to indicate if we should generate these buffers
	*/

	class WebGLRenderTarget extends EventDispatcher {
		constructor(width, height, options = {}) {
			super();
			this.isWebGLRenderTarget = true;
			this.width = width;
			this.height = height;
			this.depth = 1;
			this.scissor = new Vector4(0, 0, width, height);
			this.scissorTest = false;
			this.viewport = new Vector4(0, 0, width, height);
			const image = {
				width: width,
				height: height,
				depth: 1
			};
			this.texture = new Texture(image, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding);
			this.texture.isRenderTargetTexture = true;
			this.texture.flipY = false;
			this.texture.generateMipmaps = options.generateMipmaps !== undefined ? options.generateMipmaps : false;
			this.texture.internalFormat = options.internalFormat !== undefined ? options.internalFormat : null;
			this.texture.minFilter = options.minFilter !== undefined ? options.minFilter : LinearFilter;
			this.depthBuffer = options.depthBuffer !== undefined ? options.depthBuffer : true;
			this.stencilBuffer = options.stencilBuffer !== undefined ? options.stencilBuffer : false;
			this.depthTexture = options.depthTexture !== undefined ? options.depthTexture : null;
			this.samples = options.samples !== undefined ? options.samples : 0;
		}

		setSize(width, height, depth = 1) {
			if (this.width !== width || this.height !== height || this.depth !== depth) {
				this.width = width;
				this.height = height;
				this.depth = depth;
				this.texture.image.width = width;
				this.texture.image.height = height;
				this.texture.image.depth = depth;
				this.dispose();
			}

			this.viewport.set(0, 0, width, height);
			this.scissor.set(0, 0, width, height);
		}

		clone() {
			return new this.constructor().copy(this);
		}

		copy(source) {
			this.width = source.width;
			this.height = source.height;
			this.depth = source.depth;
			this.viewport.copy(source.viewport);
			this.texture = source.texture.clone();
			this.texture.isRenderTargetTexture = true; // ensure image object is not shared, see #20328

			const image = Object.assign({}, source.texture.image);
			this.texture.source = new Source(image);
			this.depthBuffer = source.depthBuffer;
			this.stencilBuffer = source.stencilBuffer;
			if (source.depthTexture !== null) this.depthTexture = source.depthTexture.clone();
			this.samples = source.samples;
			return this;
		}

		dispose() {
			this.dispatchEvent({
				type: 'dispose'
			});
		}

	}

	class DataArrayTexture extends Texture {
		constructor(data = null, width = 1, height = 1, depth = 1) {
			super(null);
			this.isDataArrayTexture = true;
			this.image = {
				data,
				width,
				height,
				depth
			};
			this.magFilter = NearestFilter;
			this.minFilter = NearestFilter;
			this.wrapR = ClampToEdgeWrapping;
			this.generateMipmaps = false;
			this.flipY = false;
			this.unpackAlignment = 1;
		}

	}

	class WebGLArrayRenderTarget extends WebGLRenderTarget {
		constructor(width, height, depth) {
			super(width, height);
			this.isWebGLArrayRenderTarget = true;
			this.depth = depth;
			this.texture = new DataArrayTexture(null, width, height, depth);
			this.texture.isRenderTargetTexture = true;
		}

	}

	class Data3DTexture extends Texture {
		constructor(data = null, width = 1, height = 1, depth = 1) {
			// We're going to add .setXXX() methods for setting properties later.
			// Users can still set in DataTexture3D directly.
			//
			//	const texture = new THREE.DataTexture3D( data, width, height, depth );
			// 	texture.anisotropy = 16;
			//
			// See #14839
			super(null);
			this.isData3DTexture = true;
			this.image = {
				data,
				width,
				height,
				depth
			};
			this.magFilter = NearestFilter;
			this.minFilter = NearestFilter;
			this.wrapR = ClampToEdgeWrapping;
			this.generateMipmaps = false;
			this.flipY = false;
			this.unpackAlignment = 1;
		}

	}

	class WebGL3DRenderTarget extends WebGLRenderTarget {
		constructor(width, height, depth) {
			super(width, height);
			this.isWebGL3DRenderTarget = true;
			this.depth = depth;
			this.texture = new Data3DTexture(null, width, height, depth);
			this.texture.isRenderTargetTexture = true;
		}

	}

	class WebGLMultipleRenderTargets extends WebGLRenderTarget {
		constructor(width, height, count, options = {}) {
			super(width, height, options);
			this.isWebGLMultipleRenderTargets = true;
			const texture = this.texture;
			this.texture = [];

			for (let i = 0; i < count; i++) {
				this.texture[i] = texture.clone();
				this.texture[i].isRenderTargetTexture = true;
			}
		}

		setSize(width, height, depth = 1) {
			if (this.width !== width || this.height !== height || this.depth !== depth) {
				this.width = width;
				this.height = height;
				this.depth = depth;

				for (let i = 0, il = this.texture.length; i < il; i++) {
					this.texture[i].image.width = width;
					this.texture[i].image.height = height;
					this.texture[i].image.depth = depth;
				}

				this.dispose();
			}

			this.viewport.set(0, 0, width, height);
			this.scissor.set(0, 0, width, height);
			return this;
		}

		copy(source) {
			this.dispose();
			this.width = source.width;
			this.height = source.height;
			this.depth = source.depth;
			this.viewport.set(0, 0, this.width, this.height);
			this.scissor.set(0, 0, this.width, this.height);
			this.depthBuffer = source.depthBuffer;
			this.stencilBuffer = source.stencilBuffer;
			if (source.depthTexture !== null) this.depthTexture = source.depthTexture.clone();
			this.texture.length = 0;

			for (let i = 0, il = source.texture.length; i < il; i++) {
				this.texture[i] = source.texture[i].clone();
				this.texture[i].isRenderTargetTexture = true;
			}

			return this;
		}

	}

	class Quaternion {
		constructor(x = 0, y = 0, z = 0, w = 1) {
			this.isQuaternion = true;
			this._x = x;
			this._y = y;
			this._z = z;
			this._w = w;
		}

		static slerpFlat(dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t) {
			// fuzz-free, array-based Quaternion SLERP operation
			let x0 = src0[srcOffset0 + 0],
					y0 = src0[srcOffset0 + 1],
					z0 = src0[srcOffset0 + 2],
					w0 = src0[srcOffset0 + 3];
			const x1 = src1[srcOffset1 + 0],
						y1 = src1[srcOffset1 + 1],
						z1 = src1[srcOffset1 + 2],
						w1 = src1[srcOffset1 + 3];

			if (t === 0) {
				dst[dstOffset + 0] = x0;
				dst[dstOffset + 1] = y0;
				dst[dstOffset + 2] = z0;
				dst[dstOffset + 3] = w0;
				return;
			}

			if (t === 1) {
				dst[dstOffset + 0] = x1;
				dst[dstOffset + 1] = y1;
				dst[dstOffset + 2] = z1;
				dst[dstOffset + 3] = w1;
				return;
			}

			if (w0 !== w1 || x0 !== x1 || y0 !== y1 || z0 !== z1) {
				let s = 1 - t;
				const cos = x0 * x1 + y0 * y1 + z0 * z1 + w0 * w1,
							dir = cos >= 0 ? 1 : -1,
							sqrSin = 1 - cos * cos; // Skip the Slerp for tiny steps to avoid numeric problems:

				if (sqrSin > Number.EPSILON) {
					const sin = Math.sqrt(sqrSin),
								len = Math.atan2(sin, cos * dir);
					s = Math.sin(s * len) / sin;
					t = Math.sin(t * len) / sin;
				}

				const tDir = t * dir;
				x0 = x0 * s + x1 * tDir;
				y0 = y0 * s + y1 * tDir;
				z0 = z0 * s + z1 * tDir;
				w0 = w0 * s + w1 * tDir; // Normalize in case we just did a lerp:

				if (s === 1 - t) {
					const f = 1 / Math.sqrt(x0 * x0 + y0 * y0 + z0 * z0 + w0 * w0);
					x0 *= f;
					y0 *= f;
					z0 *= f;
					w0 *= f;
				}
			}

			dst[dstOffset] = x0;
			dst[dstOffset + 1] = y0;
			dst[dstOffset + 2] = z0;
			dst[dstOffset + 3] = w0;
		}

		static multiplyQuaternionsFlat(dst, dstOffset, src0, srcOffset0, src1, srcOffset1) {
			const x0 = src0[srcOffset0];
			const y0 = src0[srcOffset0 + 1];
			const z0 = src0[srcOffset0 + 2];
			const w0 = src0[srcOffset0 + 3];
			const x1 = src1[srcOffset1];
			const y1 = src1[srcOffset1 + 1];
			const z1 = src1[srcOffset1 + 2];
			const w1 = src1[srcOffset1 + 3];
			dst[dstOffset] = x0 * w1 + w0 * x1 + y0 * z1 - z0 * y1;
			dst[dstOffset + 1] = y0 * w1 + w0 * y1 + z0 * x1 - x0 * z1;
			dst[dstOffset + 2] = z0 * w1 + w0 * z1 + x0 * y1 - y0 * x1;
			dst[dstOffset + 3] = w0 * w1 - x0 * x1 - y0 * y1 - z0 * z1;
			return dst;
		}

		get x() {
			return this._x;
		}

		set x(value) {
			this._x = value;

			this._onChangeCallback();
		}

		get y() {
			return this._y;
		}

		set y(value) {
			this._y = value;

			this._onChangeCallback();
		}

		get z() {
			return this._z;
		}

		set z(value) {
			this._z = value;

			this._onChangeCallback();
		}

		get w() {
			return this._w;
		}

		set w(value) {
			this._w = value;

			this._onChangeCallback();
		}

		set(x, y, z, w) {
			this._x = x;
			this._y = y;
			this._z = z;
			this._w = w;

			this._onChangeCallback();

			return this;
		}

		clone() {
			return new this.constructor(this._x, this._y, this._z, this._w);
		}

		copy(quaternion) {
			this._x = quaternion.x;
			this._y = quaternion.y;
			this._z = quaternion.z;
			this._w = quaternion.w;

			this._onChangeCallback();

			return this;
		}

		setFromEuler(euler, update) {
			if (!(euler && euler.isEuler)) {
				throw new Error('THREE.Quaternion: .setFromEuler() now expects an Euler rotation rather than a Vector3 and order.');
			}

			const x = euler._x,
						y = euler._y,
						z = euler._z,
						order = euler._order; // http://www.mathworks.com/matlabcentral/fileexchange/
			// 	20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors/
			//	content/SpinCalc.m

			const cos = Math.cos;
			const sin = Math.sin;
			const c1 = cos(x / 2);
			const c2 = cos(y / 2);
			const c3 = cos(z / 2);
			const s1 = sin(x / 2);
			const s2 = sin(y / 2);
			const s3 = sin(z / 2);

			switch (order) {
				case 'XYZ':
					this._x = s1 * c2 * c3 + c1 * s2 * s3;
					this._y = c1 * s2 * c3 - s1 * c2 * s3;
					this._z = c1 * c2 * s3 + s1 * s2 * c3;
					this._w = c1 * c2 * c3 - s1 * s2 * s3;
					break;

				case 'YXZ':
					this._x = s1 * c2 * c3 + c1 * s2 * s3;
					this._y = c1 * s2 * c3 - s1 * c2 * s3;
					this._z = c1 * c2 * s3 - s1 * s2 * c3;
					this._w = c1 * c2 * c3 + s1 * s2 * s3;
					break;

				case 'ZXY':
					this._x = s1 * c2 * c3 - c1 * s2 * s3;
					this._y = c1 * s2 * c3 + s1 * c2 * s3;
					this._z = c1 * c2 * s3 + s1 * s2 * c3;
					this._w = c1 * c2 * c3 - s1 * s2 * s3;
					break;

				case 'ZYX':
					this._x = s1 * c2 * c3 - c1 * s2 * s3;
					this._y = c1 * s2 * c3 + s1 * c2 * s3;
					this._z = c1 * c2 * s3 - s1 * s2 * c3;
					this._w = c1 * c2 * c3 + s1 * s2 * s3;
					break;

				case 'YZX':
					this._x = s1 * c2 * c3 + c1 * s2 * s3;
					this._y = c1 * s2 * c3 + s1 * c2 * s3;
					this._z = c1 * c2 * s3 - s1 * s2 * c3;
					this._w = c1 * c2 * c3 - s1 * s2 * s3;
					break;

				case 'XZY':
					this._x = s1 * c2 * c3 - c1 * s2 * s3;
					this._y = c1 * s2 * c3 - s1 * c2 * s3;
					this._z = c1 * c2 * s3 + s1 * s2 * c3;
					this._w = c1 * c2 * c3 + s1 * s2 * s3;
					break;

				default:
					console.warn('THREE.Quaternion: .setFromEuler() encountered an unknown order: ' + order);
			}

			if (update !== false) this._onChangeCallback();
			return this;
		}

		setFromAxisAngle(axis, angle) {
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/angleToQuaternion/index.htm
			// assumes axis is normalized
			const halfAngle = angle / 2,
						s = Math.sin(halfAngle);
			this._x = axis.x * s;
			this._y = axis.y * s;
			this._z = axis.z * s;
			this._w = Math.cos(halfAngle);

			this._onChangeCallback();

			return this;
		}

		setFromRotationMatrix(m) {
			// http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm
			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)
			const te = m.elements,
						m11 = te[0],
						m12 = te[4],
						m13 = te[8],
						m21 = te[1],
						m22 = te[5],
						m23 = te[9],
						m31 = te[2],
						m32 = te[6],
						m33 = te[10],
						trace = m11 + m22 + m33;

			if (trace > 0) {
				const s = 0.5 / Math.sqrt(trace + 1.0);
				this._w = 0.25 / s;
				this._x = (m32 - m23) * s;
				this._y = (m13 - m31) * s;
				this._z = (m21 - m12) * s;
			} else if (m11 > m22 && m11 > m33) {
				const s = 2.0 * Math.sqrt(1.0 + m11 - m22 - m33);
				this._w = (m32 - m23) / s;
				this._x = 0.25 * s;
				this._y = (m12 + m21) / s;
				this._z = (m13 + m31) / s;
			} else if (m22 > m33) {
				const s = 2.0 * Math.sqrt(1.0 + m22 - m11 - m33);
				this._w = (m13 - m31) / s;
				this._x = (m12 + m21) / s;
				this._y = 0.25 * s;
				this._z = (m23 + m32) / s;
			} else {
				const s = 2.0 * Math.sqrt(1.0 + m33 - m11 - m22);
				this._w = (m21 - m12) / s;
				this._x = (m13 + m31) / s;
				this._y = (m23 + m32) / s;
				this._z = 0.25 * s;
			}

			this._onChangeCallback();

			return this;
		}

		setFromUnitVectors(vFrom, vTo) {
			// assumes direction vectors vFrom and vTo are normalized
			let r = vFrom.dot(vTo) + 1;

			if (r < Number.EPSILON) {
				// vFrom and vTo point in opposite directions
				r = 0;

				if (Math.abs(vFrom.x) > Math.abs(vFrom.z)) {
					this._x = -vFrom.y;
					this._y = vFrom.x;
					this._z = 0;
					this._w = r;
				} else {
					this._x = 0;
					this._y = -vFrom.z;
					this._z = vFrom.y;
					this._w = r;
				}
			} else {
				// crossVectors( vFrom, vTo ); // inlined to avoid cyclic dependency on Vector3
				this._x = vFrom.y * vTo.z - vFrom.z * vTo.y;
				this._y = vFrom.z * vTo.x - vFrom.x * vTo.z;
				this._z = vFrom.x * vTo.y - vFrom.y * vTo.x;
				this._w = r;
			}

			return this.normalize();
		}

		angleTo(q) {
			return 2 * Math.acos(Math.abs(clamp(this.dot(q), -1, 1)));
		}

		rotateTowards(q, step) {
			const angle = this.angleTo(q);
			if (angle === 0) return this;
			const t = Math.min(1, step / angle);
			this.slerp(q, t);
			return this;
		}

		identity() {
			return this.set(0, 0, 0, 1);
		}

		invert() {
			// quaternion is assumed to have unit length
			return this.conjugate();
		}

		conjugate() {
			this._x *= -1;
			this._y *= -1;
			this._z *= -1;

			this._onChangeCallback();

			return this;
		}

		dot(v) {
			return this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;
		}

		lengthSq() {
			return this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;
		}

		length() {
			return Math.sqrt(this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w);
		}

		normalize() {
			let l = this.length();

			if (l === 0) {
				this._x = 0;
				this._y = 0;
				this._z = 0;
				this._w = 1;
			} else {
				l = 1 / l;
				this._x = this._x * l;
				this._y = this._y * l;
				this._z = this._z * l;
				this._w = this._w * l;
			}

			this._onChangeCallback();

			return this;
		}

		multiply(q) {
			return this.multiplyQuaternions(this, q);
		}

		premultiply(q) {
			return this.multiplyQuaternions(q, this);
		}

		multiplyQuaternions(a, b) {
			// from http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/code/index.htm
			const qax = a._x,
						qay = a._y,
						qaz = a._z,
						qaw = a._w;
			const qbx = b._x,
						qby = b._y,
						qbz = b._z,
						qbw = b._w;
			this._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;
			this._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;
			this._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;
			this._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;

			this._onChangeCallback();

			return this;
		}

		slerp(qb, t) {
			if (t === 0) return this;
			if (t === 1) return this.copy(qb);
			const x = this._x,
						y = this._y,
						z = this._z,
						w = this._w; // http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/

			let cosHalfTheta = w * qb._w + x * qb._x + y * qb._y + z * qb._z;

			if (cosHalfTheta < 0) {
				this._w = -qb._w;
				this._x = -qb._x;
				this._y = -qb._y;
				this._z = -qb._z;
				cosHalfTheta = -cosHalfTheta;
			} else {
				this.copy(qb);
			}

			if (cosHalfTheta >= 1.0) {
				this._w = w;
				this._x = x;
				this._y = y;
				this._z = z;
				return this;
			}

			const sqrSinHalfTheta = 1.0 - cosHalfTheta * cosHalfTheta;

			if (sqrSinHalfTheta <= Number.EPSILON) {
				const s = 1 - t;
				this._w = s * w + t * this._w;
				this._x = s * x + t * this._x;
				this._y = s * y + t * this._y;
				this._z = s * z + t * this._z;
				this.normalize();

				this._onChangeCallback();

				return this;
			}

			const sinHalfTheta = Math.sqrt(sqrSinHalfTheta);
			const halfTheta = Math.atan2(sinHalfTheta, cosHalfTheta);
			const ratioA = Math.sin((1 - t) * halfTheta) / sinHalfTheta,
						ratioB = Math.sin(t * halfTheta) / sinHalfTheta;
			this._w = w * ratioA + this._w * ratioB;
			this._x = x * ratioA + this._x * ratioB;
			this._y = y * ratioA + this._y * ratioB;
			this._z = z * ratioA + this._z * ratioB;

			this._onChangeCallback();

			return this;
		}

		slerpQuaternions(qa, qb, t) {
			return this.copy(qa).slerp(qb, t);
		}

		random() {
			// Derived from http://planning.cs.uiuc.edu/node198.html
			// Note, this source uses w, x, y, z ordering,
			// so we swap the order below.
			const u1 = Math.random();
			const sqrt1u1 = Math.sqrt(1 - u1);
			const sqrtu1 = Math.sqrt(u1);
			const u2 = 2 * Math.PI * Math.random();
			const u3 = 2 * Math.PI * Math.random();
			return this.set(sqrt1u1 * Math.cos(u2), sqrtu1 * Math.sin(u3), sqrtu1 * Math.cos(u3), sqrt1u1 * Math.sin(u2));
		}

		equals(quaternion) {
			return quaternion._x === this._x && quaternion._y === this._y && quaternion._z === this._z && quaternion._w === this._w;
		}

		fromArray(array, offset = 0) {
			this._x = array[offset];
			this._y = array[offset + 1];
			this._z = array[offset + 2];
			this._w = array[offset + 3];

			this._onChangeCallback();

			return this;
		}

		toArray(array = [], offset = 0) {
			array[offset] = this._x;
			array[offset + 1] = this._y;
			array[offset + 2] = this._z;
			array[offset + 3] = this._w;
			return array;
		}

		fromBufferAttribute(attribute, index) {
			this._x = attribute.getX(index);
			this._y = attribute.getY(index);
			this._z = attribute.getZ(index);
			this._w = attribute.getW(index);
			return this;
		}

		_onChange(callback) {
			this._onChangeCallback = callback;
			return this;
		}

		_onChangeCallback() {}

		*[Symbol.iterator]() {
			yield this._x;
			yield this._y;
			yield this._z;
			yield this._w;
		}

	}

	class Vector3 {
		constructor(x = 0, y = 0, z = 0) {
			Vector3.prototype.isVector3 = true;
			this.x = x;
			this.y = y;
			this.z = z;
		}

		set(x, y, z) {
			if (z === undefined) z = this.z; // sprite.scale.set(x,y)

			this.x = x;
			this.y = y;
			this.z = z;
			return this;
		}

		setScalar(scalar) {
			this.x = scalar;
			this.y = scalar;
			this.z = scalar;
			return this;
		}

		setX(x) {
			this.x = x;
			return this;
		}

		setY(y) {
			this.y = y;
			return this;
		}

		setZ(z) {
			this.z = z;
			return this;
		}

		setComponent(index, value) {
			switch (index) {
				case 0:
					this.x = value;
					break;

				case 1:
					this.y = value;
					break;

				case 2:
					this.z = value;
					break;

				default:
					throw new Error('index is out of range: ' + index);
			}

			return this;
		}

		getComponent(index) {
			switch (index) {
				case 0:
					return this.x;

				case 1:
					return this.y;

				case 2:
					return this.z;

				default:
					throw new Error('index is out of range: ' + index);
			}
		}

		clone() {
			return new this.constructor(this.x, this.y, this.z);
		}

		copy(v) {
			this.x = v.x;
			this.y = v.y;
			this.z = v.z;
			return this;
		}

		add(v) {
			this.x += v.x;
			this.y += v.y;
			this.z += v.z;
			return this;
		}

		addScalar(s) {
			this.x += s;
			this.y += s;
			this.z += s;
			return this;
		}

		addVectors(a, b) {
			this.x = a.x + b.x;
			this.y = a.y + b.y;
			this.z = a.z + b.z;
			return this;
		}

		addScaledVector(v, s) {
			this.x += v.x * s;
			this.y += v.y * s;
			this.z += v.z * s;
			return this;
		}

		sub(v) {
			this.x -= v.x;
			this.y -= v.y;
			this.z -= v.z;
			return this;
		}

		subScalar(s) {
			this.x -= s;
			this.y -= s;
			this.z -= s;
			return this;
		}

		subVectors(a, b) {
			this.x = a.x - b.x;
			this.y = a.y - b.y;
			this.z = a.z - b.z;
			return this;
		}

		multiply(v) {
			this.x *= v.x;
			this.y *= v.y;
			this.z *= v.z;
			return this;
		}

		multiplyScalar(scalar) {
			this.x *= scalar;
			this.y *= scalar;
			this.z *= scalar;
			return this;
		}

		multiplyVectors(a, b) {
			this.x = a.x * b.x;
			this.y = a.y * b.y;
			this.z = a.z * b.z;
			return this;
		}

		applyEuler(euler) {
			return this.applyQuaternion(_quaternion$4.setFromEuler(euler));
		}

		applyAxisAngle(axis, angle) {
			return this.applyQuaternion(_quaternion$4.setFromAxisAngle(axis, angle));
		}

		applyMatrix3(m) {
			const x = this.x,
						y = this.y,
						z = this.z;
			const e = m.elements;
			this.x = e[0] * x + e[3] * y + e[6] * z;
			this.y = e[1] * x + e[4] * y + e[7] * z;
			this.z = e[2] * x + e[5] * y + e[8] * z;
			return this;
		}

		applyNormalMatrix(m) {
			return this.applyMatrix3(m).normalize();
		}

		applyMatrix4(m) {
			const x = this.x,
						y = this.y,
						z = this.z;
			const e = m.elements;
			const w = 1 / (e[3] * x + e[7] * y + e[11] * z + e[15]);
			this.x = (e[0] * x + e[4] * y + e[8] * z + e[12]) * w;
			this.y = (e[1] * x + e[5] * y + e[9] * z + e[13]) * w;
			this.z = (e[2] * x + e[6] * y + e[10] * z + e[14]) * w;
			return this;
		}

		applyQuaternion(q) {
			const x = this.x,
						y = this.y,
						z = this.z;
			const qx = q.x,
						qy = q.y,
						qz = q.z,
						qw = q.w; // calculate quat * vector

			const ix = qw * x + qy * z - qz * y;
			const iy = qw * y + qz * x - qx * z;
			const iz = qw * z + qx * y - qy * x;
			const iw = -qx * x - qy * y - qz * z; // calculate result * inverse quat

			this.x = ix * qw + iw * -qx + iy * -qz - iz * -qy;
			this.y = iy * qw + iw * -qy + iz * -qx - ix * -qz;
			this.z = iz * qw + iw * -qz + ix * -qy - iy * -qx;
			return this;
		}

		project(camera) {
			return this.applyMatrix4(camera.matrixWorldInverse).applyMatrix4(camera.projectionMatrix);
		}

		unproject(camera) {
			return this.applyMatrix4(camera.projectionMatrixInverse).applyMatrix4(camera.matrixWorld);
		}

		transformDirection(m) {
			// input: THREE.Matrix4 affine matrix
			// vector interpreted as a direction
			const x = this.x,
						y = this.y,
						z = this.z;
			const e = m.elements;
			this.x = e[0] * x + e[4] * y + e[8] * z;
			this.y = e[1] * x + e[5] * y + e[9] * z;
			this.z = e[2] * x + e[6] * y + e[10] * z;
			return this.normalize();
		}

		divide(v) {
			this.x /= v.x;
			this.y /= v.y;
			this.z /= v.z;
			return this;
		}

		divideScalar(scalar) {
			return this.multiplyScalar(1 / scalar);
		}

		min(v) {
			this.x = Math.min(this.x, v.x);
			this.y = Math.min(this.y, v.y);
			this.z = Math.min(this.z, v.z);
			return this;
		}

		max(v) {
			this.x = Math.max(this.x, v.x);
			this.y = Math.max(this.y, v.y);
			this.z = Math.max(this.z, v.z);
			return this;
		}

		clamp(min, max) {
			// assumes min < max, componentwise
			this.x = Math.max(min.x, Math.min(max.x, this.x));
			this.y = Math.max(min.y, Math.min(max.y, this.y));
			this.z = Math.max(min.z, Math.min(max.z, this.z));
			return this;
		}

		clampScalar(minVal, maxVal) {
			this.x = Math.max(minVal, Math.min(maxVal, this.x));
			this.y = Math.max(minVal, Math.min(maxVal, this.y));
			this.z = Math.max(minVal, Math.min(maxVal, this.z));
			return this;
		}

		clampLength(min, max) {
			const length = this.length();
			return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max, length)));
		}

		floor() {
			this.x = Math.floor(this.x);
			this.y = Math.floor(this.y);
			this.z = Math.floor(this.z);
			return this;
		}

		ceil() {
			this.x = Math.ceil(this.x);
			this.y = Math.ceil(this.y);
			this.z = Math.ceil(this.z);
			return this;
		}

		round() {
			this.x = Math.round(this.x);
			this.y = Math.round(this.y);
			this.z = Math.round(this.z);
			return this;
		}

		roundToZero() {
			this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);
			this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);
			this.z = this.z < 0 ? Math.ceil(this.z) : Math.floor(this.z);
			return this;
		}

		negate() {
			this.x = -this.x;
			this.y = -this.y;
			this.z = -this.z;
			return this;
		}

		dot(v) {
			return this.x * v.x + this.y * v.y + this.z * v.z;
		} // TODO lengthSquared?


		lengthSq() {
			return this.x * this.x + this.y * this.y + this.z * this.z;
		}

		length() {
			return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);
		}

		manhattanLength() {
			return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z);
		}

		normalize() {
			return this.divideScalar(this.length() || 1);
		}

		setLength(length) {
			return this.normalize().multiplyScalar(length);
		}

		lerp(v, alpha) {
			this.x += (v.x - this.x) * alpha;
			this.y += (v.y - this.y) * alpha;
			this.z += (v.z - this.z) * alpha;
			return this;
		}

		lerpVectors(v1, v2, alpha) {
			this.x = v1.x + (v2.x - v1.x) * alpha;
			this.y = v1.y + (v2.y - v1.y) * alpha;
			this.z = v1.z + (v2.z - v1.z) * alpha;
			return this;
		}

		cross(v) {
			return this.crossVectors(this, v);
		}

		crossVectors(a, b) {
			const ax = a.x,
						ay = a.y,
						az = a.z;
			const bx = b.x,
						by = b.y,
						bz = b.z;
			this.x = ay * bz - az * by;
			this.y = az * bx - ax * bz;
			this.z = ax * by - ay * bx;
			return this;
		}

		projectOnVector(v) {
			const denominator = v.lengthSq();
			if (denominator === 0) return this.set(0, 0, 0);
			const scalar = v.dot(this) / denominator;
			return this.copy(v).multiplyScalar(scalar);
		}

		projectOnPlane(planeNormal) {
			_vector$c.copy(this).projectOnVector(planeNormal);

			return this.sub(_vector$c);
		}

		reflect(normal) {
			// reflect incident vector off plane orthogonal to normal
			// normal is assumed to have unit length
			return this.sub(_vector$c.copy(normal).multiplyScalar(2 * this.dot(normal)));
		}

		angleTo(v) {
			const denominator = Math.sqrt(this.lengthSq() * v.lengthSq());
			if (denominator === 0) return Math.PI / 2;
			const theta = this.dot(v) / denominator; // clamp, to handle numerical problems

			return Math.acos(clamp(theta, -1, 1));
		}

		distanceTo(v) {
			return Math.sqrt(this.distanceToSquared(v));
		}

		distanceToSquared(v) {
			const dx = this.x - v.x,
						dy = this.y - v.y,
						dz = this.z - v.z;
			return dx * dx + dy * dy + dz * dz;
		}

		manhattanDistanceTo(v) {
			return Math.abs(this.x - v.x) + Math.abs(this.y - v.y) + Math.abs(this.z - v.z);
		}

		setFromSpherical(s) {
			return this.setFromSphericalCoords(s.radius, s.phi, s.theta);
		}

		setFromSphericalCoords(radius, phi, theta) {
			const sinPhiRadius = Math.sin(phi) * radius;
			this.x = sinPhiRadius * Math.sin(theta);
			this.y = Math.cos(phi) * radius;
			this.z = sinPhiRadius * Math.cos(theta);
			return this;
		}

		setFromCylindrical(c) {
			return this.setFromCylindricalCoords(c.radius, c.theta, c.y);
		}

		setFromCylindricalCoords(radius, theta, y) {
			this.x = radius * Math.sin(theta);
			this.y = y;
			this.z = radius * Math.cos(theta);
			return this;
		}

		setFromMatrixPosition(m) {
			const e = m.elements;
			this.x = e[12];
			this.y = e[13];
			this.z = e[14];
			return this;
		}

		setFromMatrixScale(m) {
			const sx = this.setFromMatrixColumn(m, 0).length();
			const sy = this.setFromMatrixColumn(m, 1).length();
			const sz = this.setFromMatrixColumn(m, 2).length();
			this.x = sx;
			this.y = sy;
			this.z = sz;
			return this;
		}

		setFromMatrixColumn(m, index) {
			return this.fromArray(m.elements, index * 4);
		}

		setFromMatrix3Column(m, index) {
			return this.fromArray(m.elements, index * 3);
		}

		setFromEuler(e) {
			this.x = e._x;
			this.y = e._y;
			this.z = e._z;
			return this;
		}

		equals(v) {
			return v.x === this.x && v.y === this.y && v.z === this.z;
		}

		fromArray(array, offset = 0) {
			this.x = array[offset];
			this.y = array[offset + 1];
			this.z = array[offset + 2];
			return this;
		}

		toArray(array = [], offset = 0) {
			array[offset] = this.x;
			array[offset + 1] = this.y;
			array[offset + 2] = this.z;
			return array;
		}

		fromBufferAttribute(attribute, index) {
			this.x = attribute.getX(index);
			this.y = attribute.getY(index);
			this.z = attribute.getZ(index);
			return this;
		}

		random() {
			this.x = Math.random();
			this.y = Math.random();
			this.z = Math.random();
			return this;
		}

		randomDirection() {
			// Derived from https://mathworld.wolfram.com/SpherePointPicking.html
			const u = (Math.random() - 0.5) * 2;
			const t = Math.random() * Math.PI * 2;
			const f = Math.sqrt(1 - u ** 2);
			this.x = f * Math.cos(t);
			this.y = f * Math.sin(t);
			this.z = u;
			return this;
		}

		*[Symbol.iterator]() {
			yield this.x;
			yield this.y;
			yield this.z;
		}

	}

	const _vector$c = /*@__PURE__*/new Vector3();

	const _quaternion$4 = /*@__PURE__*/new Quaternion();

	class Box3 {
		constructor(min = new Vector3(+Infinity, +Infinity, +Infinity), max = new Vector3(-Infinity, -Infinity, -Infinity)) {
			this.isBox3 = true;
			this.min = min;
			this.max = max;
		}

		set(min, max) {
			this.min.copy(min);
			this.max.copy(max);
			return this;
		}

		setFromArray(array) {
			let minX = +Infinity;
			let minY = +Infinity;
			let minZ = +Infinity;
			let maxX = -Infinity;
			let maxY = -Infinity;
			let maxZ = -Infinity;

			for (let i = 0, l = array.length; i < l; i += 3) {
				const x = array[i];
				const y = array[i + 1];
				const z = array[i + 2];
				if (x < minX) minX = x;
				if (y < minY) minY = y;
				if (z < minZ) minZ = z;
				if (x > maxX) maxX = x;
				if (y > maxY) maxY = y;
				if (z > maxZ) maxZ = z;
			}

			this.min.set(minX, minY, minZ);
			this.max.set(maxX, maxY, maxZ);
			return this;
		}

		setFromBufferAttribute(attribute) {
			let minX = +Infinity;
			let minY = +Infinity;
			let minZ = +Infinity;
			let maxX = -Infinity;
			let maxY = -Infinity;
			let maxZ = -Infinity;

			for (let i = 0, l = attribute.count; i < l; i++) {
				const x = attribute.getX(i);
				const y = attribute.getY(i);
				const z = attribute.getZ(i);
				if (x < minX) minX = x;
				if (y < minY) minY = y;
				if (z < minZ) minZ = z;
				if (x > maxX) maxX = x;
				if (y > maxY) maxY = y;
				if (z > maxZ) maxZ = z;
			}

			this.min.set(minX, minY, minZ);
			this.max.set(maxX, maxY, maxZ);
			return this;
		}

		setFromPoints(points) {
			this.makeEmpty();

			for (let i = 0, il = points.length; i < il; i++) {
				this.expandByPoint(points[i]);
			}

			return this;
		}

		setFromCenterAndSize(center, size) {
			const halfSize = _vector$b.copy(size).multiplyScalar(0.5);

			this.min.copy(center).sub(halfSize);
			this.max.copy(center).add(halfSize);
			return this;
		}

		setFromObject(object, precise = false) {
			this.makeEmpty();
			return this.expandByObject(object, precise);
		}

		clone() {
			return new this.constructor().copy(this);
		}

		copy(box) {
			this.min.copy(box.min);
			this.max.copy(box.max);
			return this;
		}

		makeEmpty() {
			this.min.x = this.min.y = this.min.z = +Infinity;
			this.max.x = this.max.y = this.max.z = -Infinity;
			return this;
		}

		isEmpty() {
			// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes
			return this.max.x < this.min.x || this.max.y < this.min.y || this.max.z < this.min.z;
		}

		getCenter(target) {
			return this.isEmpty() ? target.set(0, 0, 0) : target.addVectors(this.min, this.max).multiplyScalar(0.5);
		}

		getSize(target) {
			return this.isEmpty() ? target.set(0, 0, 0) : target.subVectors(this.max, this.min);
		}

		expandByPoint(point) {
			this.min.min(point);
			this.max.max(point);
			return this;
		}

		expandByVector(vector) {
			this.min.sub(vector);
			this.max.add(vector);
			return this;
		}

		expandByScalar(scalar) {
			this.min.addScalar(-scalar);
			this.max.addScalar(scalar);
			return this;
		}

		expandByObject(object, precise = false) {
			// Computes the world-axis-aligned bounding box of an object (including its children),
			// accounting for both the object's, and children's, world transforms
			object.updateWorldMatrix(false, false);
			const geometry = object.geometry;

			if (geometry !== undefined) {
				if (precise && geometry.attributes != undefined && geometry.attributes.position !== undefined) {
					const position = geometry.attributes.position;

					for (let i = 0, l = position.count; i < l; i++) {
						_vector$b.fromBufferAttribute(position, i).applyMatrix4(object.matrixWorld);

						this.expandByPoint(_vector$b);
					}
				} else {
					if (geometry.boundingBox === null) {
						geometry.computeBoundingBox();
					}

					_box$3.copy(geometry.boundingBox);

					_box$3.applyMatrix4(object.matrixWorld);

					this.union(_box$3);
				}
			}

			const children = object.children;

			for (let i = 0, l = children.length; i < l; i++) {
				this.expandByObject(children[i], precise);
			}

			return this;
		}

		containsPoint(point) {
			return point.x < this.min.x || point.x > this.max.x || point.y < this.min.y || point.y > this.max.y || point.z < this.min.z || point.z > this.max.z ? false : true;
		}

		containsBox(box) {
			return this.min.x <= box.min.x && box.max.x <= this.max.x && this.min.y <= box.min.y && box.max.y <= this.max.y && this.min.z <= box.min.z && box.max.z <= this.max.z;
		}

		getParameter(point, target) {
			// This can potentially have a divide by zero if the box
			// has a size dimension of 0.
			return target.set((point.x - this.min.x) / (this.max.x - this.min.x), (point.y - this.min.y) / (this.max.y - this.min.y), (point.z - this.min.z) / (this.max.z - this.min.z));
		}

		intersectsBox(box) {
			// using 6 splitting planes to rule out intersections.
			return box.max.x < this.min.x || box.min.x > this.max.x || box.max.y < this.min.y || box.min.y > this.max.y || box.max.z < this.min.z || box.min.z > this.max.z ? false : true;
		}

		intersectsSphere(sphere) {
			// Find the point on the AABB closest to the sphere center.
			this.clampPoint(sphere.center, _vector$b); // If that point is inside the sphere, the AABB and sphere intersect.

			return _vector$b.distanceToSquared(sphere.center) <= sphere.radius * sphere.radius;
		}

		intersectsPlane(plane) {
			// We compute the minimum and maximum dot product values. If those values
			// are on the same side (back or front) of the plane, then there is no intersection.
			let min, max;

			if (plane.normal.x > 0) {
				min = plane.normal.x * this.min.x;
				max = plane.normal.x * this.max.x;
			} else {
				min = plane.normal.x * this.max.x;
				max = plane.normal.x * this.min.x;
			}

			if (plane.normal.y > 0) {
				min += plane.normal.y * this.min.y;
				max += plane.normal.y * this.max.y;
			} else {
				min += plane.normal.y * this.max.y;
				max += plane.normal.y * this.min.y;
			}

			if (plane.normal.z > 0) {
				min += plane.normal.z * this.min.z;
				max += plane.normal.z * this.max.z;
			} else {
				min += plane.normal.z * this.max.z;
				max += plane.normal.z * this.min.z;
			}

			return min <= -plane.constant && max >= -plane.constant;
		}

		intersectsTriangle(triangle) {
			if (this.isEmpty()) {
				return false;
			} // compute box center and extents


			this.getCenter(_center);

			_extents.subVectors(this.max, _center); // translate triangle to aabb origin


			_v0$2.subVectors(triangle.a, _center);

			_v1$7.subVectors(triangle.b, _center);

			_v2$3.subVectors(triangle.c, _center); // compute edge vectors for triangle


			_f0.subVectors(_v1$7, _v0$2);

			_f1.subVectors(_v2$3, _v1$7);

			_f2.subVectors(_v0$2, _v2$3); // test against axes that are given by cross product combinations of the edges of the triangle and the edges of the aabb
			// make an axis testing of each of the 3 sides of the aabb against each of the 3 sides of the triangle = 9 axis of separation
			// axis_ij = u_i x f_j (u0, u1, u2 = face normals of aabb = x,y,z axes vectors since aabb is axis aligned)


			let axes = [0, -_f0.z, _f0.y, 0, -_f1.z, _f1.y, 0, -_f2.z, _f2.y, _f0.z, 0, -_f0.x, _f1.z, 0, -_f1.x, _f2.z, 0, -_f2.x, -_f0.y, _f0.x, 0, -_f1.y, _f1.x, 0, -_f2.y, _f2.x, 0];

			if (!satForAxes(axes, _v0$2, _v1$7, _v2$3, _extents)) {
				return false;
			} // test 3 face normals from the aabb


			axes = [1, 0, 0, 0, 1, 0, 0, 0, 1];

			if (!satForAxes(axes, _v0$2, _v1$7, _v2$3, _extents)) {
				return false;
			} // finally testing the face normal of the triangle
			// use already existing triangle edge vectors here


			_triangleNormal.crossVectors(_f0, _f1);

			axes = [_triangleNormal.x, _triangleNormal.y, _triangleNormal.z];
			return satForAxes(axes, _v0$2, _v1$7, _v2$3, _extents);
		}

		clampPoint(point, target) {
			return target.copy(point).clamp(this.min, this.max);
		}

		distanceToPoint(point) {
			const clampedPoint = _vector$b.copy(point).clamp(this.min, this.max);

			return clampedPoint.sub(point).length();
		}

		getBoundingSphere(target) {
			this.getCenter(target.center);
			target.radius = this.getSize(_vector$b).length() * 0.5;
			return target;
		}

		intersect(box) {
			this.min.max(box.min);
			this.max.min(box.max); // ensure that if there is no overlap, the result is fully empty, not slightly empty with non-inf/+inf values that will cause subsequence intersects to erroneously return valid values.

			if (this.isEmpty()) this.makeEmpty();
			return this;
		}

		union(box) {
			this.min.min(box.min);
			this.max.max(box.max);
			return this;
		}

		applyMatrix4(matrix) {
			// transform of empty box is an empty box.
			if (this.isEmpty()) return this; // NOTE: I am using a binary pattern to specify all 2^3 combinations below

			_points[0].set(this.min.x, this.min.y, this.min.z).applyMatrix4(matrix); // 000


			_points[1].set(this.min.x, this.min.y, this.max.z).applyMatrix4(matrix); // 001


			_points[2].set(this.min.x, this.max.y, this.min.z).applyMatrix4(matrix); // 010


			_points[3].set(this.min.x, this.max.y, this.max.z).applyMatrix4(matrix); // 011


			_points[4].set(this.max.x, this.min.y, this.min.z).applyMatrix4(matrix); // 100


			_points[5].set(this.max.x, this.min.y, this.max.z).applyMatrix4(matrix); // 101


			_points[6].set(this.max.x, this.max.y, this.min.z).applyMatrix4(matrix); // 110


			_points[7].set(this.max.x, this.max.y, this.max.z).applyMatrix4(matrix); // 111


			this.setFromPoints(_points);
			return this;
		}

		translate(offset) {
			this.min.add(offset);
			this.max.add(offset);
			return this;
		}

		equals(box) {
			return box.min.equals(this.min) && box.max.equals(this.max);
		}

	}

	const _points = [/*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3(), /*@__PURE__*/new Vector3()];

	const _vector$b = /*@__PURE__*/new Vector3();

	const _box$3 = /*@__PURE__*/new Box3(); // triangle centered vertices


	const _v0$2 = /*@__PURE__*/new Vector3();

	const _v1$7 = /*@__PURE__*/new Vector3();

	const _v2$3 = /*@__PURE__*/new Vector3(); // triangle edge vectors


	const _f0 = /*@__PURE__*/new Vector3();

	const _f1 = /*@__PURE__*/new Vector3();

	const _f2 = /*@__PURE__*/new Vector3();

	const _center = /*@__PURE__*/new Vector3();

	const _extents = /*@__PURE__*/new Vector3();

	const _triangleNormal = /*@__PURE__*/new Vector3();

	const _testAxis = /*@__PURE__*/new Vector3();

	function satForAxes(axes, v0, v1, v2, extents) {
		for (let i = 0, j = axes.length - 3; i <= j; i += 3) {
			_testAxis.fromArray(axes, i); // project the aabb onto the separating axis


			const r = extents.x * Math.abs(_testAxis.x) + extents.y * Math.abs(_testAxis.y) + extents.z * Math.abs(_testAxis.z); // project all 3 vertices of the triangle onto the separating axis

			const p0 = v0.dot(_testAxis);
			const p1 = v1.dot(_testAxis);
			const p2 = v2.dot(_testAxis); // actual test, basically see if either of the most extreme of the triangle points intersects r

			if (Math.max(-Math.max(p0, p1, p2), Math.min(p0, p1, p2)) > r) {
				// points of the projected triangle are outside the projected half-length of the aabb
				// the axis is separating and we can exit
				return false;
			}
		}

		return true;
	}

	const _box$2 = /*@__PURE__*/new Box3();

	const _v1$6 = /*@__PURE__*/new Vector3();

	const _toFarthestPoint = /*@__PURE__*/new Vector3();

	const _toPoint = /*@__PURE__*/new Vector3();

	class Sphere {
		constructor(center = new Vector3(), radius = -1) {
			this.center = center;
			this.radius = radius;
		}

		set(center, radius) {
			this.center.copy(center);
			this.radius = radius;
			return this;
		}

		setFromPoints(points, optionalCenter) {
			const center = this.center;

			if (optionalCenter !== undefined) {
				center.copy(optionalCenter);
			} else {
				_box$2.setFromPoints(points).getCenter(center);
			}

			let maxRadiusSq = 0;

			for (let i = 0, il = points.length; i < il; i++) {
				maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(points[i]));
			}

			this.radius = Math.sqrt(maxRadiusSq);
			return this;
		}

		copy(sphere) {
			this.center.copy(sphere.center);
			this.radius = sphere.radius;
			return this;
		}

		isEmpty() {
			return this.radius < 0;
		}

		makeEmpty() {
			this.center.set(0, 0, 0);
			this.radius = -1;
			return this;
		}

		containsPoint(point) {
			return point.distanceToSquared(this.center) <= this.radius * this.radius;
		}

		distanceToPoint(point) {
			return point.distanceTo(this.center) - this.radius;
		}

		intersectsSphere(sphere) {
			const radiusSum = this.radius + sphere.radius;
			return sphere.center.distanceToSquared(this.center) <= radiusSum * radiusSum;
		}

		intersectsBox(box) {
			return box.intersectsSphere(this);
		}

		intersectsPlane(plane) {
			return Math.abs(plane.distanceToPoint(this.center)) <= this.radius;
		}

		clampPoint(point, target) {
			const deltaLengthSq = this.center.distanceToSquared(point);
			target.copy(point);

			if (deltaLengthSq > this.radius * this.radius) {
				target.sub(this.center).normalize();
				target.multiplyScalar(this.radius).add(this.center);
			}

			return target;
		}

		getBoundingBox(target) {
			if (this.isEmpty()) {
				// Empty sphere produces empty bounding box
				target.makeEmpty();
				return target;
			}

			target.set(this.center, this.center);
			target.expandByScalar(this.radius);
			return target;
		}

		applyMatrix4(matrix) {
			this.center.applyMatrix4(matrix);
			this.radius = this.radius * matrix.getMaxScaleOnAxis();
			return this;
		}

		translate(offset) {
			this.center.add(offset);
			return this;
		}

		expandByPoint(point) {
			// from https://github.com/juj/MathGeoLib/blob/2940b99b99cfe575dd45103ef20f4019dee15b54/src/Geometry/Sphere.cpp#L649-L671
			_toPoint.subVectors(point, this.center);

			const lengthSq = _toPoint.lengthSq();

			if (lengthSq > this.radius * this.radius) {
				const length = Math.sqrt(lengthSq);
				const missingRadiusHalf = (length - this.radius) * 0.5; // Nudge this sphere towards the target point. Add half the missing distance to radius,
				// and the other half to position. This gives a tighter enclosure, instead of if
				// the whole missing distance were just added to radius.

				this.center.add(_toPoint.multiplyScalar(missingRadiusHalf / length));
				this.radius += missingRadiusHalf;
			}

			return this;
		}

		union(sphere) {
			// from https://github.com/juj/MathGeoLib/blob/2940b99b99cfe575dd45103ef20f4019dee15b54/src/Geometry/Sphere.cpp#L759-L769
			// To enclose another sphere into this sphere, we only need to enclose two points:
			// 1) Enclose the farthest point on the other sphere into this sphere.
			// 2) Enclose the opposite point of the farthest point into this sphere.
			if (this.center.equals(sphere.center) === true) {
				_toFarthestPoint.set(0, 0, 1).multiplyScalar(sphere.radius);
			} else {
				_toFarthestPoint.subVectors(sphere.center, this.center).normalize().multiplyScalar(sphere.radius);
			}

			this.expandByPoint(_v1$6.copy(sphere.center).add(_toFarthestPoint));
			this.expandByPoint(_v1$6.copy(sphere.center).sub(_toFarthestPoint));
			return this;
		}

		equals(sphere) {
			return sphere.center.equals(this.center) && sphere.radius === this.radius;
		}

		clone() {
			return new this.constructor().copy(this);
		}

	}

	const _vector$a = /*@__PURE__*/new Vector3();

	const _segCenter = /*@__PURE__*/new Vector3();

	const _segDir = /*@__PURE__*/new Vector3();

	const _diff = /*@__PURE__*/new Vector3();

	const _edge1 = /*@__PURE__*/new Vector3();

	const _edge2 = /*@__PURE__*/new Vector3();

	const _normal$1 = /*@__PURE__*/new Vector3();

	class Ray {
		constructor(origin = new Vector3(), direction = new Vector3(0, 0, -1)) {
			this.origin = origin;
			this.direction = direction;
		}

		set(origin, direction) {
			this.origin.copy(origin);
			this.direction.copy(direction);
			return this;
		}

		copy(ray) {
			this.origin.copy(ray.origin);
			this.direction.copy(ray.direction);
			return this;
		}

		at(t, target) {
			return target.copy(this.direction).multiplyScalar(t).add(this.origin);
		}

		lookAt(v) {
			this.direction.copy(v).sub(this.origin).normalize();
			return this;
		}

		recast(t) {
			this.origin.copy(this.at(t, _vector$a));
			return this;
		}

		closestPointToPoint(point, target) {
			target.subVectors(point, this.origin);
			const directionDistance = target.dot(this.direction);

			if (directionDistance < 0) {
				return target.copy(this.origin);
			}

			return target.copy(this.direction).multiplyScalar(directionDistance).add(this.origin);
		}

		distanceToPoint(point) {
			return Math.sqrt(this.distanceSqToPoint(point));
		}

		distanceSqToPoint(point) {
			const directionDistance = _vector$a.subVectors(point, this.origin).dot(this.direction); // point behind the ray


			if (directionDistance < 0) {
				return this.origin.distanceToSquared(point);
			}

			_vector$a.copy(this.direction).multiplyScalar(directionDistance).add(this.origin);

			return _vector$a.distanceToSquared(point);
		}

		distanceSqToSegment(v0, v1, optionalPointOnRay, optionalPointOnSegment) {
			// from https://github.com/pmjoniak/GeometricTools/blob/master/GTEngine/Include/Mathematics/GteDistRaySegment.h
			// It returns the min distance between the ray and the segment
			// defined by v0 and v1
			// It can also set two optional targets :
			// - The closest point on the ray
			// - The closest point on the segment
			_segCenter.copy(v0).add(v1).multiplyScalar(0.5);

			_segDir.copy(v1).sub(v0).normalize();

			_diff.copy(this.origin).sub(_segCenter);

			const segExtent = v0.distanceTo(v1) * 0.5;
			const a01 = -this.direction.dot(_segDir);

			const b0 = _diff.dot(this.direction);

			const b1 = -_diff.dot(_segDir);

			const c = _diff.lengthSq();

			const det = Math.abs(1 - a01 * a01);
			let s0, s1, sqrDist, extDet;

			if (det > 0) {
				// The ray and segment are not parallel.
				s0 = a01 * b1 - b0;
				s1 = a01 * b0 - b1;
				extDet = segExtent * det;

				if (s0 >= 0) {
					if (s1 >= -extDet) {
						if (s1 <= extDet) {
							// region 0
							// Minimum at interior points of ray and segment.
							const invDet = 1 / det;
							s0 *= invDet;
							s1 *= invDet;
							sqrDist = s0 * (s0 + a01 * s1 + 2 * b0) + s1 * (a01 * s0 + s1 + 2 * b1) + c;
						} else {
							// region 1
							s1 = segExtent;
							s0 = Math.max(0, -(a01 * s1 + b0));
							sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
						}
					} else {
						// region 5
						s1 = -segExtent;
						s0 = Math.max(0, -(a01 * s1 + b0));
						sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
					}
				} else {
					if (s1 <= -extDet) {
						// region 4
						s0 = Math.max(0, -(-a01 * segExtent + b0));
						s1 = s0 > 0 ? -segExtent : Math.min(Math.max(-segExtent, -b1), segExtent);
						sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
					} else if (s1 <= extDet) {
						// region 3
						s0 = 0;
						s1 = Math.min(Math.max(-segExtent, -b1), segExtent);
						sqrDist = s1 * (s1 + 2 * b1) + c;
					} else {
						// region 2
						s0 = Math.max(0, -(a01 * segExtent + b0));
						s1 = s0 > 0 ? segExtent : Math.min(Math.max(-segExtent, -b1), segExtent);
						sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
					}
				}
			} else {
				// Ray and segment are parallel.
				s1 = a01 > 0 ? -segExtent : segExtent;
				s0 = Math.max(0, -(a01 * s1 + b0));
				sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
			}

			if (optionalPointOnRay) {
				optionalPointOnRay.copy(this.direction).multiplyScalar(s0).add(this.origin);
			}

			if (optionalPointOnSegment) {
				optionalPointOnSegment.copy(_segDir).multiplyScalar(s1).add(_segCenter);
			}

			return sqrDist;
		}

		intersectSphere(sphere, target) {
			_vector$a.subVectors(sphere.center, this.origin);

			const tca = _vector$a.dot(this.direction);

			const d2 = _vector$a.dot(_vector$a) - tca * tca;
			const radius2 = sphere.radius * sphere.radius;
			if (d2 > radius2) return null;
			const thc = Math.sqrt(radius2 - d2); // t0 = first intersect point - entrance on front of sphere

			const t0 = tca - thc; // t1 = second intersect point - exit point on back of sphere

			const t1 = tca + thc; // test to see if both t0 and t1 are behind the ray - if so, return null

			if (t0 < 0 && t1 < 0) return null; // test to see if t0 is behind the ray:
			// if it is, the ray is inside the sphere, so return the second exit point scaled by t1,
			// in order to always return an intersect point that is in front of the ray.

			if (t0 < 0) return this.at(t1, target); // else t0 is in front of the ray, so return the first collision point scaled by t0

			return this.at(t0, target);
		}

		intersectsSphere(sphere) {
			return this.distanceSqToPoint(sphere.center) <= sphere.radius * sphere.radius;
		}

		distanceToPlane(plane) {
			const denominator = plane.normal.dot(this.direction);

			if (denominator === 0) {
				// line is coplanar, return origin
				if (plane.distanceToPoint(this.origin) === 0) {
					return 0;
				} // Null is preferable to undefined since undefined means.... it is undefined


				return null;
			}

			const t = -(this.origin.dot(plane.normal) + plane.constant) / denominator; // Return if the ray never intersects the plane

			return t >= 0 ? t : null;
		}

		intersectPlane(plane, target) {
			const t = this.distanceToPlane(plane);

			if (t === null) {
				return null;
			}

			return this.at(t, target);
		}

		intersectsPlane(plane) {
			// check if the ray lies on the plane first
			const distToPoint = plane.distanceToPoint(this.origin);

			if (distToPoint === 0) {
				return true;
			}

			const denominator = plane.normal.dot(this.direction);

			if (denominator * distToPoint < 0) {
				return true;
			} // ray origin is behind the plane (and is pointing behind it)


			return false;
		}

		intersectBox(box, target) {
			let tmin, tmax, tymin, tymax, tzmin, tzmax;
			const invdirx = 1 / this.direction.x,
						invdiry = 1 / this.direction.y,
						invdirz = 1 / this.direction.z;
			const origin = this.origin;

			if (invdirx >= 0) {
				tmin = (box.min.x - origin.x) * invdirx;
				tmax = (box.max.x - origin.x) * invdirx;
			} else {
				tmin = (box.max.x - origin.x) * invdirx;
				tmax = (box.min.x - origin.x) * invdirx;
			}

			if (invdiry >= 0) {
				tymin = (box.min.y - origin.y) * invdiry;
				tymax = (box.max.y - origin.y) * invdiry;
			} else {
				tymin = (box.max.y - origin.y) * invdiry;
				tymax = (box.min.y - origin.y) * invdiry;
			}

			if (tmin > tymax || tymin > tmax) return null; // These lines also handle the case where tmin or tmax is NaN
			// (result of 0 * Infinity). x !== x returns true if x is NaN

			if (tymin > tmin || tmin !== tmin) tmin = tymin;
			if (tymax < tmax || tmax !== tmax) tmax = tymax;

			if (invdirz >= 0) {
				tzmin = (box.min.z - origin.z) * invdirz;
				tzmax = (box.max.z - origin.z) * invdirz;
			} else {
				tzmin = (box.max.z - origin.z) * invdirz;
				tzmax = (box.min.z - origin.z) * invdirz;
			}

			if (tmin > tzmax || tzmin > tmax) return null;
			if (tzmin > tmin || tmin !== tmin) tmin = tzmin;
			if (tzmax < tmax || tmax !== tmax) tmax = tzmax; //return point closest to the ray (positive side)

			if (tmax < 0) return null;
			return this.at(tmin >= 0 ? tmin : tmax, target);
		}

		intersectsBox(box) {
			return this.intersectBox(box, _vector$a) !== null;
		}

		intersectTriangle(a, b, c, backfaceCulling, target) {
			// Compute the offset origin, edges, and normal.
			// from https://github.com/pmjoniak/GeometricTools/blob/master/GTEngine/Include/Mathematics/GteIntrRay3Triangle3.h
			_edge1.subVectors(b, a);

			_edge2.subVectors(c, a);

			_normal$1.crossVectors(_edge1, _edge2); // Solve Q + t*D = b1*E1 + b2*E2 (Q = kDiff, D = ray direction,
			// E1 = kEdge1, E2 = kEdge2, N = Cross(E1,E2)) by
			//	 |Dot(D,N)|*b1 = sign(Dot(D,N))*Dot(D,Cross(Q,E2))
			//	 |Dot(D,N)|*b2 = sign(Dot(D,N))*Dot(D,Cross(E1,Q))
			//	 |Dot(D,N)|*t = -sign(Dot(D,N))*Dot(Q,N)


			let DdN = this.direction.dot(_normal$1);
			let sign;

			if (DdN > 0) {
				if (backfaceCulling) return null;
				sign = 1;
			} else if (DdN < 0) {
				sign = -1;
				DdN = -DdN;
			} else {
				return null;
			}

			_diff.subVectors(this.origin, a);

			const DdQxE2 = sign * this.direction.dot(_edge2.crossVectors(_diff, _edge2)); // b1 < 0, no intersection

			if (DdQxE2 < 0) {
				return null;
			}

			const DdE1xQ = sign * this.direction.dot(_edge1.cross(_diff)); // b2 < 0, no intersection

			if (DdE1xQ < 0) {
				return null;
			} // b1+b2 > 1, no intersection


			if (DdQxE2 + DdE1xQ > DdN) {
				return null;
			} // Line intersects triangle, check if ray does.


			const QdN = -sign * _diff.dot(_normal$1); // t < 0, no intersection


			if (QdN < 0) {
				return null;
			} // Ray intersects triangle.


			return this.at(QdN / DdN, target);
		}

		applyMatrix4(matrix4) {
			this.origin.applyMatrix4(matrix4);
			this.direction.transformDirection(matrix4);
			return this;
		}

		equals(ray) {
			return ray.origin.equals(this.origin) && ray.direction.equals(this.direction);
		}

		clone() {
			return new this.constructor().copy(this);
		}

	}

	class Matrix4 {
		constructor() {
			Matrix4.prototype.isMatrix4 = true;
			this.elements = [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1];
		}

		set(n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44) {
			const te = this.elements;
			te[0] = n11;
			te[4] = n12;
			te[8] = n13;
			te[12] = n14;
			te[1] = n21;
			te[5] = n22;
			te[9] = n23;
			te[13] = n24;
			te[2] = n31;
			te[6] = n32;
			te[10] = n33;
			te[14] = n34;
			te[3] = n41;
			te[7] = n42;
			te[11] = n43;
			te[15] = n44;
			return this;
		}

		identity() {
			this.set(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
			return this;
		}

		clone() {
			return new Matrix4().fromArray(this.elements);
		}

		copy(m) {
			const te = this.elements;
			const me = m.elements;
			te[0] = me[0];
			te[1] = me[1];
			te[2] = me[2];
			te[3] = me[3];
			te[4] = me[4];
			te[5] = me[5];
			te[6] = me[6];
			te[7] = me[7];
			te[8] = me[8];
			te[9] = me[9];
			te[10] = me[10];
			te[11] = me[11];
			te[12] = me[12];
			te[13] = me[13];
			te[14] = me[14];
			te[15] = me[15];
			return this;
		}

		copyPosition(m) {
			const te = this.elements,
						me = m.elements;
			te[12] = me[12];
			te[13] = me[13];
			te[14] = me[14];
			return this;
		}

		setFromMatrix3(m) {
			const me = m.elements;
			this.set(me[0], me[3], me[6], 0, me[1], me[4], me[7], 0, me[2], me[5], me[8], 0, 0, 0, 0, 1);
			return this;
		}

		extractBasis(xAxis, yAxis, zAxis) {
			xAxis.setFromMatrixColumn(this, 0);
			yAxis.setFromMatrixColumn(this, 1);
			zAxis.setFromMatrixColumn(this, 2);
			return this;
		}

		makeBasis(xAxis, yAxis, zAxis) {
			this.set(xAxis.x, yAxis.x, zAxis.x, 0, xAxis.y, yAxis.y, zAxis.y, 0, xAxis.z, yAxis.z, zAxis.z, 0, 0, 0, 0, 1);
			return this;
		}

		extractRotation(m) {
			// this method does not support reflection matrices
			const te = this.elements;
			const me = m.elements;

			const scaleX = 1 / _v1$5.setFromMatrixColumn(m, 0).length();

			const scaleY = 1 / _v1$5.setFromMatrixColumn(m, 1).length();

			const scaleZ = 1 / _v1$5.setFromMatrixColumn(m, 2).length();

			te[0] = me[0] * scaleX;
			te[1] = me[1] * scaleX;
			te[2] = me[2] * scaleX;
			te[3] = 0;
			te[4] = me[4] * scaleY;
			te[5] = me[5] * scaleY;
			te[6] = me[6] * scaleY;
			te[7] = 0;
			te[8] = me[8] * scaleZ;
			te[9] = me[9] * scaleZ;
			te[10] = me[10] * scaleZ;
			te[11] = 0;
			te[12] = 0;
			te[13] = 0;
			te[14] = 0;
			te[15] = 1;
			return this;
		}

		makeRotationFromEuler(euler) {
			const te = this.elements;
			const x = euler.x,
						y = euler.y,
						z = euler.z;
			const a = Math.cos(x),
						b = Math.sin(x);
			const c = Math.cos(y),
						d = Math.sin(y);
			const e = Math.cos(z),
						f = Math.sin(z);

			if (euler.order === 'XYZ') {
				const ae = a * e,
							af = a * f,
							be = b * e,
							bf = b * f;
				te[0] = c * e;
				te[4] = -c * f;
				te[8] = d;
				te[1] = af + be * d;
				te[5] = ae - bf * d;
				te[9] = -b * c;
				te[2] = bf - ae * d;
				te[6] = be + af * d;
				te[10] = a * c;
			} else if (euler.order === 'YXZ') {
				const ce = c * e,
							cf = c * f,
							de = d * e,
							df = d * f;
				te[0] = ce + df * b;
				te[4] = de * b - cf;
				te[8] = a * d;
				te[1] = a * f;
				te[5] = a * e;
				te[9] = -b;
				te[2] = cf * b - de;
				te[6] = df + ce * b;
				te[10] = a * c;
			} else if (euler.order === 'ZXY') {
				const ce = c * e,
							cf = c * f,
							de = d * e,
							df = d * f;
				te[0] = ce - df * b;
				te[4] = -a * f;
				te[8] = de + cf * b;
				te[1] = cf + de * b;
				te[5] = a * e;
				te[9] = df - ce * b;
				te[2] = -a * d;
				te[6] = b;
				te[10] = a * c;
			} else if (euler.order === 'ZYX') {
				const ae = a * e,
							af = a * f,
							be = b * e,
							bf = b * f;
				te[0] = c * e;
				te[4] = be * d - af;
				te[8] = ae * d + bf;
				te[1] = c * f;
				te[5] = bf * d + ae;
				te[9] = af * d - be;
				te[2] = -d;
				te[6] = b * c;
				te[10] = a * c;
			} else if (euler.order === 'YZX') {
				const ac = a * c,
							ad = a * d,
							bc = b * c,
							bd = b * d;
				te[0] = c * e;
				te[4] = bd - ac * f;
				te[8] = bc * f + ad;
				te[1] = f;
				te[5] = a * e;
				te[9] = -b * e;
				te[2] = -d * e;
				te[6] = ad * f + bc;
				te[10] = ac - bd * f;
			} else if (euler.order === 'XZY') {
				const ac = a * c,
							ad = a * d,
							bc = b * c,
							bd = b * d;
				te[0] = c * e;
				te[4] = -f;
				te[8] = d * e;
				te[1] = ac * f + bd;
				te[5] = a * e;
				te[9] = ad * f - bc;
				te[2] = bc * f - ad;
				te[6] = b * e;
				te[10] = bd * f + ac;
			} // bottom row


			te[3] = 0;
			te[7] = 0;
			te[11] = 0; // last column

			te[12] = 0;
			te[13] = 0;
			te[14] = 0;
			te[15] = 1;
			return this;
		}

		makeRotationFromQuaternion(q) {
			return this.compose(_zero, q, _one);
		}

		lookAt(eye, target, up) {
			const te = this.elements;

			_z.subVectors(eye, target);

			if (_z.lengthSq() === 0) {
				// eye and target are in the same position
				_z.z = 1;
			}

			_z.normalize();

			_x.crossVectors(up, _z);

			if (_x.lengthSq() === 0) {
				// up and z are parallel
				if (Math.abs(up.z) === 1) {
					_z.x += 0.0001;
				} else {
					_z.z += 0.0001;
				}

				_z.normalize();

				_x.crossVectors(up, _z);
			}

			_x.normalize();

			_y.crossVectors(_z, _x);

			te[0] = _x.x;
			te[4] = _y.x;
			te[8] = _z.x;
			te[1] = _x.y;
			te[5] = _y.y;
			te[9] = _z.y;
			te[2] = _x.z;
			te[6] = _y.z;
			te[10] = _z.z;
			return this;
		}

		multiply(m) {
			return this.multiplyMatrices(this, m);
		}

		premultiply(m) {
			return this.multiplyMatrices(m, this);
		}

		multiplyMatrices(a, b) {
			const ae = a.elements;
			const be = b.elements;
			const te = this.elements;
			const a11 = ae[0],
						a12 = ae[4],
						a13 = ae[8],
						a14 = ae[12];
			const a21 = ae[1],
						a22 = ae[5],
						a23 = ae[9],
						a24 = ae[13];
			const a31 = ae[2],
						a32 = ae[6],
						a33 = ae[10],
						a34 = ae[14];
			const a41 = ae[3],
						a42 = ae[7],
						a43 = ae[11],
						a44 = ae[15];
			const b11 = be[0],
						b12 = be[4],
						b13 = be[8],
						b14 = be[12];
			const b21 = be[1],
						b22 = be[5],
						b23 = be[9],
						b24 = be[13];
			const b31 = be[2],
						b32 = be[6],
						b33 = be[10],
						b34 = be[14];
			const b41 = be[3],
						b42 = be[7],
						b43 = be[11],
						b44 = be[15];
			te[0] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;
			te[4] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;
			te[8] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;
			te[12] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;
			te[1] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;
			te[5] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;
			te[9] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;
			te[13] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;
			te[2] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;
			te[6] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;
			te[10] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;
			te[14] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;
			te[3] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;
			te[7] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;
			te[11] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;
			te[15] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;
			return this;
		}

		multiplyScalar(s) {
			const te = this.elements;
			te[0] *= s;
			te[4] *= s;
			te[8] *= s;
			te[12] *= s;
			te[1] *= s;
			te[5] *= s;
			te[9] *= s;
			te[13] *= s;
			te[2] *= s;
			te[6] *= s;
			te[10] *= s;
			te[14] *= s;
			te[3] *= s;
			te[7] *= s;
			te[11] *= s;
			te[15] *= s;
			return this;
		}

		determinant() {
			const te = this.elements;
			const n11 = te[0],
						n12 = te[4],
						n13 = te[8],
						n14 = te[12];
			const n21 = te[1],
						n22 = te[5],
						n23 = te[9],
						n24 = te[13];
			const n31 = te[2],
						n32 = te[6],
						n33 = te[10],
						n34 = te[14];
			const n41 = te[3],
						n42 = te[7],
						n43 = te[11],
						n44 = te[15]; //TODO: make this more efficient
			//( based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm )

			return n41 * (+n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34) + n42 * (+n11 * n23 * n34 - n11 * n24 * n33 + n14 * n21 * n33 - n13 * n21 * n34 + n13 * n24 * n31 - n14 * n23 * n31) + n43 * (+n11 * n24 * n32 - n11 * n22 * n34 - n14 * n21 * n32 + n12 * n21 * n34 + n14 * n22 * n31 - n12 * n24 * n31) + n44 * (-n13 * n22 * n31 - n11 * n23 * n32 + n11 * n22 * n33 + n13 * n21 * n32 - n12 * n21 * n33 + n12 * n23 * n31);
		}

		transpose() {
			const te = this.elements;
			let tmp;
			tmp = te[1];
			te[1] = te[4];
			te[4] = tmp;
			tmp = te[2];
			te[2] = te[8];
			te[8] = tmp;
			tmp = te[6];
			te[6] = te[9];
			te[9] = tmp;
			tmp = te[3];
			te[3] = te[12];
			te[12] = tmp;
			tmp = te[7];
			te[7] = te[13];
			te[13] = tmp;
			tmp = te[11];
			te[11] = te[14];
			te[14] = tmp;
			return this;
		}

		setPosition(x, y, z) {
			const te = this.elements;

			if (x.isVector3) {
				te[12] = x.x;
				te[13] = x.y;
				te[14] = x.z;
			} else {
				te[12] = x;
				te[13] = y;
				te[14] = z;
			}

			return this;
		}

		invert() {
			// based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm
			const te = this.elements,
						n11 = te[0],
						n21 = te[1],
						n31 = te[2],
						n41 = te[3],
						n12 = te[4],
						n22 = te[5],
						n32 = te[6],
						n42 = te[7],
						n13 = te[8],
						n23 = te[9],
						n33 = te[10],
						n43 = te[11],
						n14 = te[12],
						n24 = te[13],
						n34 = te[14],
						n44 = te[15],
						t11 = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44,
						t12 = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44,
						t13 = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44,
						t14 = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;
			const det = n11 * t11 + n21 * t12 + n31 * t13 + n41 * t14;
			if (det === 0) return this.set(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
			const detInv = 1 / det;
			te[0] = t11 * detInv;
			te[1] = (n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44) * detInv;
			te[2] = (n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44) * detInv;
			te[3] = (n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43) * detInv;
			te[4] = t12 * detInv;
			te[5] = (n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44) * detInv;
			te[6] = (n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44) * detInv;
			te[7] = (n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43) * detInv;
			te[8] = t13 * detInv;
			te[9] = (n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44) * detInv;
			te[10] = (n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44) * detInv;
			te[11] = (n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43) * detInv;
			te[12] = t14 * detInv;
			te[13] = (n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34) * detInv;
			te[14] = (n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34) * detInv;
			te[15] = (n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33) * detInv;
			return this;
		}

		scale(v) {
			const te = this.elements;
			const x = v.x,
						y = v.y,
						z = v.z;
			te[0] *= x;
			te[4] *= y;
			te[8] *= z;
			te[1] *= x;
			te[5] *= y;
			te[9] *= z;
			te[2] *= x;
			te[6] *= y;
			te[10] *= z;
			te[3] *= x;
			te[7] *= y;
			te[11] *= z;
			return this;
		}

		getMaxScaleOnAxis() {
			const te = this.elements;
			const scaleXSq = te[0] * te[0] + te[1] * te[1] + te[2] * te[2];
			const scaleYSq = te[4] * te[4] + te[5] * te[5] + te[6] * te[6];
			const scaleZSq = te[8] * te[8] + te[9] * te[9] + te[10] * te[10];
			return Math.sqrt(Math.max(scaleXSq, scaleYSq, scaleZSq));
		}

		makeTranslation(x, y, z) {
			this.set(1, 0, 0, x, 0, 1, 0, y, 0, 0, 1, z, 0, 0, 0, 1);
			return this;
		}

		makeRotationX(theta) {
			const c = Math.cos(theta),
						s = Math.sin(theta);
			this.set(1, 0, 0, 0, 0, c, -s, 0, 0, s, c, 0, 0, 0, 0, 1);
			return this;
		}

		makeRotationY(theta) {
			const c = Math.cos(theta),
						s = Math.sin(theta);
			this.set(c, 0, s, 0, 0, 1, 0, 0, -s, 0, c, 0, 0, 0, 0, 1);
			return this;
		}

		makeRotationZ(theta) {
			const c = Math.cos(theta),
						s = Math.sin(theta);
			this.set(c, -s, 0, 0, s, c, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
			return this;
		}

		makeRotationAxis(axis, angle) {
			// Based on http://www.gamedev.net/reference/articles/article1199.asp
			const c = Math.cos(angle);
			const s = Math.sin(angle);
			const t = 1 - c;
			const x = axis.x,
						y = axis.y,
						z = axis.z;
			const tx = t * x,
						ty = t * y;
			this.set(tx * x + c, tx * y - s * z, tx * z + s * y, 0, tx * y + s * z, ty * y + c, ty * z - s * x, 0, tx * z - s * y, ty * z + s * x, t * z * z + c, 0, 0, 0, 0, 1);
			return this;
		}

		makeScale(x, y, z) {
			this.set(x, 0, 0, 0, 0, y, 0, 0, 0, 0, z, 0, 0, 0, 0, 1);
			return this;
		}

		makeShear(xy, xz, yx, yz, zx, zy) {
			this.set(1, yx, zx, 0, xy, 1, zy, 0, xz, yz, 1, 0, 0, 0, 0, 1);
			return this;
		}

		compose(position, quaternion, scale) {
			const te = this.elements;
			const x = quaternion._x,
						y = quaternion._y,
						z = quaternion._z,
						w = quaternion._w;
			const x2 = x + x,
						y2 = y + y,
						z2 = z + z;
			const xx = x * x2,
						xy = x * y2,
						xz = x * z2;
			const yy = y * y2,
						yz = y * z2,
						zz = z * z2;
			const wx = w * x2,
						wy = w * y2,
						wz = w * z2;
			const sx = scale.x,
						sy = scale.y,
						sz = scale.z;
			te[0] = (1 - (yy + zz)) * sx;
			te[1] = (xy + wz) * sx;
			te[2] = (xz - wy) * sx;
			te[3] = 0;
			te[4] = (xy - wz) * sy;
			te[5] = (1 - (xx + zz)) * sy;
			te[6] = (yz + wx) * sy;
			te[7] = 0;
			te[8] = (xz + wy) * sz;
			te[9] = (yz - wx) * sz;
			te[10] = (1 - (xx + yy)) * sz;
			te[11] = 0;
			te[12] = position.x;
			te[13] = position.y;
			te[14] = position.z;
			te[15] = 1;
			return this;
		}

		decompose(position, quaternion, scale) {
			const te = this.elements;

			let sx = _v1$5.set(te[0], te[1], te[2]).length();

			const sy = _v1$5.set(te[4], te[5], te[6]).length();

			const sz = _v1$5.set(te[8], te[9], te[10]).length(); // if determine is negative, we need to invert one scale


			const det = this.determinant();
			if (det < 0) sx = -sx;
			position.x = te[12];
			position.y = te[13];
			position.z = te[14]; // scale the rotation part

			_m1$2.copy(this);

			const invSX = 1 / sx;
			const invSY = 1 / sy;
			const invSZ = 1 / sz;
			_m1$2.elements[0] *= invSX;
			_m1$2.elements[1] *= invSX;
			_m1$2.elements[2] *= invSX;
			_m1$2.elements[4] *= invSY;
			_m1$2.elements[5] *= invSY;
			_m1$2.elements[6] *= invSY;
			_m1$2.elements[8] *= invSZ;
			_m1$2.elements[9] *= invSZ;
			_m1$2.elements[10] *= invSZ;
			quaternion.setFromRotationMatrix(_m1$2);
			scale.x = sx;
			scale.y = sy;
			scale.z = sz;
			return this;
		}

		makePerspective(left, right, top, bottom, near, far) {
			const te = this.elements;
			const x = 2 * near / (right - left);
			const y = 2 * near / (top - bottom);
			const a = (right + left) / (right - left);
			const b = (top + bottom) / (top - bottom);
			const c = -(far + near) / (far - near);
			const d = -2 * far * near / (far - near);
			te[0] = x;
			te[4] = 0;
			te[8] = a;
			te[12] = 0;
			te[1] = 0;
			te[5] = y;
			te[9] = b;
			te[13] = 0;
			te[2] = 0;
			te[6] = 0;
			te[10] = c;
			te[14] = d;
			te[3] = 0;
			te[7] = 0;
			te[11] = -1;
			te[15] = 0;
			return this;
		}

		makeOrthographic(left, right, top, bottom, near, far) {
			const te = this.elements;
			const w = 1.0 / (right - left);
			const h = 1.0 / (top - bottom);
			const p = 1.0 / (far - near);
			const x = (right + left) * w;
			const y = (top + bottom) * h;
			const z = (far + near) * p;
			te[0] = 2 * w;
			te[4] = 0;
			te[8] = 0;
			te[12] = -x;
			te[1] = 0;
			te[5] = 2 * h;
			te[9] = 0;
			te[13] = -y;
			te[2] = 0;
			te[6] = 0;
			te[10] = -2 * p;
			te[14] = -z;
			te[3] = 0;
			te[7] = 0;
			te[11] = 0;
			te[15] = 1;
			return this;
		}

		equals(matrix) {
			const te = this.elements;
			const me = matrix.elements;

			for (let i = 0; i < 16; i++) {
				if (te[i] !== me[i]) return false;
			}

			return true;
		}

		fromArray(array, offset = 0) {
			for (let i = 0; i < 16; i++) {
				this.elements[i] = array[i + offset];
			}

			return this;
		}

		toArray(array = [], offset = 0) {
			const te = this.elements;
			array[offset] = te[0];
			array[offset + 1] = te[1];
			array[offset + 2] = te[2];
			array[offset + 3] = te[3];
			array[offset + 4] = te[4];
			array[offset + 5] = te[5];
			array[offset + 6] = te[6];
			array[offset + 7] = te[7];
			array[offset + 8] = te[8];
			array[offset + 9] = te[9];
			array[offset + 10] = te[10];
			array[offset + 11] = te[11];
			array[offset + 12] = te[12];
			array[offset + 13] = te[13];
			array[offset + 14] = te[14];
			array[offset + 15] = te[15];
			return array;
		}

	}

	const _v1$5 = /*@__PURE__*/new Vector3();

	const _m1$2 = /*@__PURE__*/new Matrix4();

	const _zero = /*@__PURE__*/new Vector3(0, 0, 0);

	const _one = /*@__PURE__*/new Vector3(1, 1, 1);

	const _x = /*@__PURE__*/new Vector3();

	const _y = /*@__PURE__*/new Vector3();

	const _z = /*@__PURE__*/new Vector3();

	const _matrix$1 = /*@__PURE__*/new Matrix4();

	const _quaternion$3 = /*@__PURE__*/new Quaternion();

	class Euler {
		constructor(x = 0, y = 0, z = 0, order = Euler.DefaultOrder) {
			this.isEuler = true;
			this._x = x;
			this._y = y;
			this._z = z;
			this._order = order;
		}

		get x() {
			return this._x;
		}

		set x(value) {
			this._x = value;

			this._onChangeCallback();
		}

		get y() {
			return this._y;
		}

		set y(value) {
			this._y = value;

			this._onChangeCallback();
		}

		get z() {
			return this._z;
		}

		set z(value) {
			this._z = value;

			this._onChangeCallback();
		}

		get order() {
			return this._order;
		}

		set order(value) {
			this._order = value;

			this._onChangeCallback();
		}

		set(x, y, z, order = this._order) {
			this._x = x;
			this._y = y;
			this._z = z;
			this._order = order;

			this._onChangeCallback();

			return this;
		}

		clone() {
			return new this.constructor(this._x, this._y, this._z, this._order);
		}

		copy(euler) {
			this._x = euler._x;
			this._y = euler._y;
			this._z = euler._z;
			this._order = euler._order;

			this._onChangeCallback();

			return this;
		}

		setFromRotationMatrix(m, order = this._order, update = true) {
			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)
			const te = m.elements;
			const m11 = te[0],
						m12 = te[4],
						m13 = te[8];
			const m21 = te[1],
						m22 = te[5],
						m23 = te[9];
			const m31 = te[2],
						m32 = te[6],
						m33 = te[10];

			switch (order) {
				case 'XYZ':
					this._y = Math.asin(clamp(m13, -1, 1));

					if (Math.abs(m13) < 0.9999999) {
						this._x = Math.atan2(-m23, m33);
						this._z = Math.atan2(-m12, m11);
					} else {
						this._x = Math.atan2(m32, m22);
						this._z = 0;
					}

					break;

				case 'YXZ':
					this._x = Math.asin(-clamp(m23, -1, 1));

					if (Math.abs(m23) < 0.9999999) {
						this._y = Math.atan2(m13, m33);
						this._z = Math.atan2(m21, m22);
					} else {
						this._y = Math.atan2(-m31, m11);
						this._z = 0;
					}

					break;

				case 'ZXY':
					this._x = Math.asin(clamp(m32, -1, 1));

					if (Math.abs(m32) < 0.9999999) {
						this._y = Math.atan2(-m31, m33);
						this._z = Math.atan2(-m12, m22);
					} else {
						this._y = 0;
						this._z = Math.atan2(m21, m11);
					}

					break;

				case 'ZYX':
					this._y = Math.asin(-clamp(m31, -1, 1));

					if (Math.abs(m31) < 0.9999999) {
						this._x = Math.atan2(m32, m33);
						this._z = Math.atan2(m21, m11);
					} else {
						this._x = 0;
						this._z = Math.atan2(-m12, m22);
					}

					break;

				case 'YZX':
					this._z = Math.asin(clamp(m21, -1, 1));

					if (Math.abs(m21) < 0.9999999) {
						this._x = Math.atan2(-m23, m22);
						this._y = Math.atan2(-m31, m11);
					} else {
						this._x = 0;
						this._y = Math.atan2(m13, m33);
					}

					break;

				case 'XZY':
					this._z = Math.asin(-clamp(m12, -1, 1));

					if (Math.abs(m12) < 0.9999999) {
						this._x = Math.atan2(m32, m22);
						this._y = Math.atan2(m13, m11);
					} else {
						this._x = Math.atan2(-m23, m33);
						this._y = 0;
					}

					break;

				default:
					console.warn('THREE.Euler: .setFromRotationMatrix() encountered an unknown order: ' + order);
			}

			this._order = order;
			if (update === true) this._onChangeCallback();
			return this;
		}

		setFromQuaternion(q, order, update) {
			_matrix$1.makeRotationFromQuaternion(q);

			return this.setFromRotationMatrix(_matrix$1, order, update);
		}

		setFromVector3(v, order = this._order) {
			return this.set(v.x, v.y, v.z, order);
		}

		reorder(newOrder) {
			// WARNING: this discards revolution information -bhouston
			_quaternion$3.setFromEuler(this);

			return this.setFromQuaternion(_quaternion$3, newOrder);
		}

		equals(euler) {
			return euler._x === this._x && euler._y === this._y && euler._z === this._z && euler._order === this._order;
		}

		fromArray(array) {
			this._x = array[0];
			this._y = array[1];
			this._z = array[2];
			if (array[3] !== undefined) this._order = array[3];

			this._onChangeCallback();

			return this;
		}

		toArray(array = [], offset = 0) {
			array[offset] = this._x;
			array[offset + 1] = this._y;
			array[offset + 2] = this._z;
			array[offset + 3] = this._order;
			return array;
		}

		_onChange(callback) {
			this._onChangeCallback = callback;
			return this;
		}

		_onChangeCallback() {}

		*[Symbol.iterator]() {
			yield this._x;
			yield this._y;
			yield this._z;
			yield this._order;
		} // @deprecated since r138, 02cf0df1cb4575d5842fef9c85bb5a89fe020d53


		toVector3() {
			console.error('THREE.Euler: .toVector3() has been removed. Use Vector3.setFromEuler() instead');
		}

	}

	Euler.DefaultOrder = 'XYZ';
	Euler.RotationOrders = ['XYZ', 'YZX', 'ZXY', 'XZY', 'YXZ', 'ZYX'];

	class Layers {
		constructor() {
			this.mask = 1 | 0;
		}

		set(channel) {
			this.mask = (1 << channel | 0) >>> 0;
		}

		enable(channel) {
			this.mask |= 1 << channel | 0;
		}

		enableAll() {
			this.mask = 0xffffffff | 0;
		}

		toggle(channel) {
			this.mask ^= 1 << channel | 0;
		}

		disable(channel) {
			this.mask &= ~(1 << channel | 0);
		}

		disableAll() {
			this.mask = 0;
		}

		test(layers) {
			return (this.mask & layers.mask) !== 0;
		}

		isEnabled(channel) {
			return (this.mask & (1 << channel | 0)) !== 0;
		}

	}

	let _object3DId = 0;

	const _v1$4 = /*@__PURE__*/new Vector3();

	const _q1 = /*@__PURE__*/new Quaternion();

	const _m1$1 = /*@__PURE__*/new Matrix4();

	const _target = /*@__PURE__*/new Vector3();

	const _position$3 = /*@__PURE__*/new Vector3();

	const _scale$2 = /*@__PURE__*/new Vector3();

	const _quaternion$2 = /*@__PURE__*/new Quaternion();

	const _xAxis = /*@__PURE__*/new Vector3(1, 0, 0);

	const _yAxis = /*@__PURE__*/new Vector3(0, 1, 0);

	const _zAxis = /*@__PURE__*/new Vector3(0, 0, 1);

	const _addedEvent = {
		type: 'added'
	};
	const _removedEvent = {
		type: 'removed'
	};

	class Object3D extends EventDispatcher {
		constructor() {
			super();
			this.isObject3D = true;
			Object.defineProperty(this, 'id', {
				value: _object3DId++
			});
			this.uuid = generateUUID();
			this.name = '';
			this.type = 'Object3D';
			this.parent = null;
			this.children = [];
			this.up = Object3D.DefaultUp.clone();
			const position = new Vector3();
			const rotation = new Euler();
			const quaternion = new Quaternion();
			const scale = new Vector3(1, 1, 1);

			function onRotationChange() {
				quaternion.setFromEuler(rotation, false);
			}

			function onQuaternionChange() {
				rotation.setFromQuaternion(quaternion, undefined, false);
			}

			rotation._onChange(onRotationChange);

			quaternion._onChange(onQuaternionChange);

			Object.defineProperties(this, {
				position: {
					configurable: true,
					enumerable: true,
					value: position
				},
				rotation: {
					configurable: true,
					enumerable: true,
					value: rotation
				},
				quaternion: {
					configurable: true,
					enumerable: true,
					value: quaternion
				},
				scale: {
					configurable: true,
					enumerable: true,
					value: scale
				},
				modelViewMatrix: {
					value: new Matrix4()
				},
				normalMatrix: {
					value: new Matrix3()
				}
			});
			this.matrix = new Matrix4();
			this.matrixWorld = new Matrix4();
			this.matrixAutoUpdate = Object3D.DefaultMatrixAutoUpdate;
			this.matrixWorldNeedsUpdate = false;
			this.layers = new Layers();
			this.visible = true;
			this.castShadow = false;
			this.receiveShadow = false;
			this.frustumCulled = true;
			this.renderOrder = 0;
			this.animations = [];
			this.userData = {};
		}

		onBeforeRender() {}

		onAfterRender() {}

		applyMatrix4(matrix) {
			if (this.matrixAutoUpdate) this.updateMatrix();
			this.matrix.premultiply(matrix);
			this.matrix.decompose(this.position, this.quaternion, this.scale);
		}

		applyQuaternion(q) {
			this.quaternion.premultiply(q);
			return this;
		}

		setRotationFromAxisAngle(axis, angle) {
			// assumes axis is normalized
			this.quaternion.setFromAxisAngle(axis, angle);
		}

		setRotationFromEuler(euler) {
			this.quaternion.setFromEuler(euler, true);
		}

		setRotationFromMatrix(m) {
			// assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)
			this.quaternion.setFromRotationMatrix(m);
		}

		setRotationFromQuaternion(q) {
			// assumes q is normalized
			this.quaternion.copy(q);
		}

		rotateOnAxis(axis, angle) {
			// rotate object on axis in object space
			// axis is assumed to be normalized
			_q1.setFromAxisAngle(axis, angle);

			this.quaternion.multiply(_q1);
			return this;
		}

		rotateOnWorldAxis(axis, angle) {
			// rotate object on axis in world space
			// axis is assumed to be normalized
			// method assumes no rotated parent
			_q1.setFromAxisAngle(axis, angle);

			this.quaternion.premultiply(_q1);
			return this;
		}

		rotateX(angle) {
			return this.rotateOnAxis(_xAxis, angle);
		}

		rotateY(angle) {
			return this.rotateOnAxis(_yAxis, angle);
		}

		rotateZ(angle) {
			return this.rotateOnAxis(_zAxis, angle);
		}

		translateOnAxis(axis, distance) {
			// translate object by distance along axis in object space
			// axis is assumed to be normalized
			_v1$4.copy(axis).applyQuaternion(this.quaternion);

			this.position.add(_v1$4.multiplyScalar(distance));
			return this;
		}

		translateX(distance) {
			return this.translateOnAxis(_xAxis, distance);
		}

		translateY(distance) {
			return this.translateOnAxis(_yAxis, distance);
		}

		translateZ(distance) {
			return this.translateOnAxis(_zAxis, distance);
		}

		localToWorld(vector) {
			return vector.applyMatrix4(this.matrixWorld);
		}

		worldToLocal(vector) {
			return vector.applyMatrix4(_m1$1.copy(this.matrixWorld).invert());
		}

		lookAt(x, y, z) {
			// This method does not support objects having non-uniformly-scaled parent(s)
			if (x.isVector3) {
				_target.copy(x);
			} else {
				_target.set(x, y, z);
			}

			const parent = this.parent;
			this.updateWorldMatrix(true, false);

			_position$3.setFromMatrixPosition(this.matrixWorld);

			if (this.isCamera || this.isLight) {
				_m1$1.lookAt(_position$3, _target, this.up);
			} else {
				_m1$1.lookAt(_target, _position$3, this.up);
			}

			this.quaternion.setFromRotationMatrix(_m1$1);

			if (parent) {
				_m1$1.extractRotation(parent.matrixWorld);

				_q1.setFromRotationMatrix(_m1$1);

				this.quaternion.premultiply(_q1.invert());
			}
		}

		add(object) {
			if (arguments.length > 1) {
				for (let i = 0; i < arguments.length; i++) {
					this.add(arguments[i]);
				}

				return this;
			}

			if (object === this) {
				console.error('THREE.Object3D.add: object can\'t be added as a child of itself.', object);
				return this;
			}

			if (object && object.isObject3D) {
				if (object.parent !== null) {
					object.parent.remove(object);
				}

				object.parent = this;
				this.children.push(object);
				object.dispatchEvent(_addedEvent);
			} else {
				console.error('THREE.Object3D.add: object not an instance of THREE.Object3D.', object);
			}

			return this;
		}

		remove(object) {
			if (arguments.length > 1) {
				for (let i = 0; i < arguments.length; i++) {
					this.remove(arguments[i]);
				}

				return this;
			}

			const index = this.children.indexOf(object);

			if (index !== -1) {
				object.parent = null;
				this.children.splice(index, 1);
				object.dispatchEvent(_removedEvent);
			}

			return this;
		}

		removeFromParent() {
			const parent = this.parent;

			if (parent !== null) {
				parent.remove(this);
			}

			return this;
		}

		clear() {
			for (let i = 0; i < this.children.length; i++) {
				const object = this.children[i];
				object.parent = null;
				object.dispatchEvent(_removedEvent);
			}

			this.children.length = 0;
			return this;
		}

		attach(object) {
			// adds object as a child of this, while maintaining the object's world transform
			// Note: This method does not support scene graphs having non-uniformly-scaled nodes(s)
			this.updateWorldMatrix(true, false);

			_m1$1.copy(this.matrixWorld).invert();

			if (object.parent !== null) {
				object.parent.updateWorldMatrix(true, false);

				_m1$1.multiply(object.parent.matrixWorld);
			}

			object.applyMatrix4(_m1$1);
			this.add(object);
			object.updateWorldMatrix(false, true);
			return this;
		}

		getObjectById(id) {
			return this.getObjectByProperty('id', id);
		}

		getObjectByName(name) {
			return this.getObjectByProperty('name', name);
		}

		getObjectByProperty(name, value) {
			if (this[name] === value) return this;

			for (let i = 0, l = this.children.length; i < l; i++) {
				const child = this.children[i];
				const object = child.getObjectByProperty(name, value);

				if (object !== undefined) {
					return object;
				}
			}

			return undefined;
		}

		getWorldPosition(target) {
			this.updateWorldMatrix(true, false);
			return target.setFromMatrixPosition(this.matrixWorld);
		}

		getWorldQuaternion(target) {
			this.updateWorldMatrix(true, false);
			this.matrixWorld.decompose(_position$3, target, _scale$2);
			return target;
		}

		getWorldScale(target) {
			this.updateWorldMatrix(true, false);
			this.matrixWorld.decompose(_position$3, _quaternion$2, target);
			return target;
		}

		getWorldDirection(target) {
			this.updateWorldMatrix(true, false);
			const e = this.matrixWorld.elements;
			return target.set(e[8], e[9], e[10]).normalize();
		}

		raycast() {}

		traverse(callback) {
			callback(this);
			const children = this.children;

			for (let i = 0, l = children.length; i < l; i++) {
				children[i].traverse(callback);
			}
		}

		traverseVisible(callback) {
			if (this.visible === false) return;
			callback(this);
			const children = this.children;

			for (let i = 0, l = children.length; i < l; i++) {
				children[i].traverseVisible(callback);
			}
		}

		traverseAncestors(callback) {
			const parent = this.parent;

			if (parent !== null) {
				callback(parent);
				parent.traverseAncestors(callback);
			}
		}

		updateMatrix() {
			this.matrix.compose(this.position, this.quaternion, this.scale);
			this.matrixWorldNeedsUpdate = true;
		}

		updateMatrixWorld(force) {
			if (this.matrixAutoUpdate) this.updateMatrix();

			if (this.matrixWorldNeedsUpdate || force) {
				if (this.parent === null) {
					this.matrixWorld.copy(this.matrix);
				} else {
					this.matrixWorld.multiplyMatrices(this.parent.matrixWorld, this.matrix);
				}

				this.matrixWorldNeedsUpdate = false;
				force = true;
			} // update children


			const children = this.children;

			for (let i = 0, l = children.length; i < l; i++) {
				children[i].updateMatrixWorld(force);
			}
		}

		updateWorldMatrix(updateParents, updateChildren) {
			const parent = this.parent;

			if (updateParents === true && parent !== null) {
				parent.updateWorldMatrix(true, false);
			}

			if (this.matrixAutoUpdate) this.updateMatrix();

			if (this.parent === null) {
				this.matrixWorld.copy(this.matrix);
			} else {
				this.matrixWorld.multiplyMatrices(this.parent.matrixWorld, this.matrix);
			} // update children


			if (updateChildren === true) {
				const children = this.children;

				for (let i = 0, l = children.length; i < l; i++) {
					children[i].updateWorldMatrix(false, true);
				}
			}
		}

		toJSON(meta) {
			// meta is a string when called from JSON.stringify
			const isRootObject = meta === undefined || typeof meta === 'string';
			const output = {}; // meta is a hash used to collect geometries, materials.
			// not providing it implies that this is the root object
			// being serialized.

			if (isRootObject) {
				// initialize meta obj
				meta = {
					geometries: {},
					materials: {},
					textures: {},
					images: {},
					shapes: {},
					skeletons: {},
					animations: {},
					nodes: {}
				};
				output.metadata = {
					version: 4.5,
					type: 'Object',
					generator: 'Object3D.toJSON'
				};
			} // standard Object3D serialization


			const object = {};
			object.uuid = this.uuid;
			object.type = this.type;
			if (this.name !== '') object.name = this.name;
			if (this.castShadow === true) object.castShadow = true;
			if (this.receiveShadow === true) object.receiveShadow = true;
			if (this.visible === false) object.visible = false;
			if (this.frustumCulled === false) object.frustumCulled = false;
			if (this.renderOrder !== 0) object.renderOrder = this.renderOrder;
			if (JSON.stringify(this.userData) !== '{}') object.userData = this.userData;
			object.layers = this.layers.mask;
			object.matrix = this.matrix.toArray();
			if (this.matrixAutoUpdate === false) object.matrixAutoUpdate = false; // object specific properties

			if (this.isInstancedMesh) {
				object.type = 'InstancedMesh';
				object.count = this.count;
				object.instanceMatrix = this.instanceMatrix.toJSON();
				if (this.instanceColor !== null) object.instanceColor = this.instanceColor.toJSON();
			} //


			function serialize(library, element) {
				if (library[element.uuid] === undefined) {
					library[element.uuid] = element.toJSON(meta);
				}

				return element.uuid;
			}

			if (this.isScene) {
				if (this.background) {
					if (this.background.isColor) {
						object.background = this.background.toJSON();
					} else if (this.background.isTexture) {
						object.background = this.background.toJSON(meta).uuid;
					}
				}

				if (this.environment && this.environment.isTexture && this.environment.isRenderTargetTexture !== true) {
					object.environment = this.environment.toJSON(meta).uuid;
				}
			} else if (this.isMesh || this.isLine || this.isPoints) {
				object.geometry = serialize(meta.geometries, this.geometry);
				const parameters = this.geometry.parameters;

				if (parameters !== undefined && parameters.shapes !== undefined) {
					const shapes = parameters.shapes;

					if (Array.isArray(shapes)) {
						for (let i = 0, l = shapes.length; i < l; i++) {
							const shape = shapes[i];
							serialize(meta.shapes, shape);
						}
					} else {
						serialize(meta.shapes, shapes);
					}
				}
			}

			if (this.isSkinnedMesh) {
				object.bindMode = this.bindMode;
				object.bindMatrix = this.bindMatrix.toArray();

				if (this.skeleton !== undefined) {
					serialize(meta.skeletons, this.skeleton);
					object.skeleton = this.skeleton.uuid;
				}
			}

			if (this.material !== undefined) {
				if (Array.isArray(this.material)) {
					const uuids = [];

					for (let i = 0, l = this.material.length; i < l; i++) {
						uuids.push(serialize(meta.materials, this.material[i]));
					}

					object.material = uuids;
				} else {
					object.material = serialize(meta.materials, this.material);
				}
			} //


			if (this.children.length > 0) {
				object.children = [];

				for (let i = 0; i < this.children.length; i++) {
					object.children.push(this.children[i].toJSON(meta).object);
				}
			} //


			if (this.animations.length > 0) {
				object.animations = [];

				for (let i = 0; i < this.animations.length; i++) {
					const animation = this.animations[i];
					object.animations.push(serialize(meta.animations, animation));
				}
			}

			if (isRootObject) {
				const geometries = extractFromCache(meta.geometries);
				const materials = extractFromCache(meta.materials);
				const textures = extractFromCache(meta.textures);
				const images = extractFromCache(meta.images);
				const shapes = extractFromCache(meta.shapes);
				const skeletons = extractFromCache(meta.skeletons);
				const animations = extractFromCache(meta.animations);
				const nodes = extractFromCache(meta.nodes);
				if (geometries.length > 0) output.geometries = geometries;
				if (materials.length > 0) output.materials = materials;
				if (textures.length > 0) output.textures = textures;
				if (images.length > 0) output.images = images;
				if (shapes.length > 0) output.shapes = shapes;
				if (skeletons.length > 0) output.skeletons = skeletons;
				if (animations.length > 0) output.animations = animations;
				if (nodes.length > 0) output.nodes = nodes;
			}

			output.object = object;
			return output; // extract data from the cache hash
			// remove metadata on each item
			// and return as array

			function extractFromCache(cache) {
				const values = [];

				for (const key in cache) {
					const data = cache[key];
					delete data.metadata;
					values.push(data);
				}

				return values;
			}
		}

		clone(recursive) {
			return new this.constructor().copy(this, recursive);
		}

		copy(source, recursive = true) {
			this.name = source.name;
			this.up.copy(source.up);
			this.position.copy(source.position);
			this.rotation.order = source.rotation.order;
			this.quaternion.copy(source.quaternion);
			this.scale.copy(source.scale);
			this.matrix.copy(source.matrix);
			this.matrixWorld.copy(source.matrixWorld);
			this.matrixAutoUpdate = source.matrixAutoUpdate;
			this.matrixWorldNeedsUpdate = source.matrixWorldNeedsUpdate;
			this.layers.mask = source.layers.mask;
			this.visible = source.visible;
			this.castShadow = source.castShadow;
			this.receiveShadow = source.receiveShadow;
			this.frustumCulled = source.frustumCulled;
			this.renderOrder = source.renderOrder;
			this.userData = JSON.parse(JSON.stringify(source.userData));

			if (recursive === true) {
				for (let i = 0; i < source.children.length; i++) {
					const child = source.children[i];
					this.add(child.clone());
				}
			}

			return this;
		}

	}

	Object3D.DefaultUp = /*@__PURE__*/new Vector3(0, 1, 0);
	Object3D.DefaultMatrixAutoUpdate = true;

	const _v0$1 = /*@__PURE__*/new Vector3();

	const _v1$3 = /*@__PURE__*/new Vector3();

	const _v2$2 = /*@__PURE__*/new Vector3();

	const _v3$1 = /*@__PURE__*/new Vector3();

	const _vab = /*@__PURE__*/new Vector3();

	const _vac = /*@__PURE__*/new Vector3();

	const _vbc = /*@__PURE__*/new Vector3();

	const _vap = /*@__PURE__*/new Vector3();

	const _vbp = /*@__PURE__*/new Vector3();

	const _vcp = /*@__PURE__*/new Vector3();

	class Triangle {
		constructor(a = new Vector3(), b = new Vector3(), c = new Vector3()) {
			this.a = a;
			this.b = b;
			this.c = c;
		}

		static getNormal(a, b, c, target) {
			target.subVectors(c, b);

			_v0$1.subVectors(a, b);

			target.cross(_v0$1);
			const targetLengthSq = target.lengthSq();

			if (targetLengthSq > 0) {
				return target.multiplyScalar(1 / Math.sqrt(targetLengthSq));
			}

			return target.set(0, 0, 0);
		} // static/instance method to calculate barycentric coordinates
		// based on: http://www.blackpawn.com/texts/pointinpoly/default.html


		static getBarycoord(point, a, b, c, target) {
			_v0$1.subVectors(c, a);

			_v1$3.subVectors(b, a);

			_v2$2.subVectors(point, a);

			const dot00 = _v0$1.dot(_v0$1);

			const dot01 = _v0$1.dot(_v1$3);

			const dot02 = _v0$1.dot(_v2$2);

			const dot11 = _v1$3.dot(_v1$3);

			const dot12 = _v1$3.dot(_v2$2);

			const denom = dot00 * dot11 - dot01 * dot01; // collinear or singular triangle

			if (denom === 0) {
				// arbitrary location outside of triangle?
				// not sure if this is the best idea, maybe should be returning undefined
				return target.set(-2, -1, -1);
			}

			const invDenom = 1 / denom;
			const u = (dot11 * dot02 - dot01 * dot12) * invDenom;
			const v = (dot00 * dot12 - dot01 * dot02) * invDenom; // barycentric coordinates must always sum to 1

			return target.set(1 - u - v, v, u);
		}

		static containsPoint(point, a, b, c) {
			this.getBarycoord(point, a, b, c, _v3$1);
			return _v3$1.x >= 0 && _v3$1.y >= 0 && _v3$1.x + _v3$1.y <= 1;
		}

		static getUV(point, p1, p2, p3, uv1, uv2, uv3, target) {
			this.getBarycoord(point, p1, p2, p3, _v3$1);
			target.set(0, 0);
			target.addScaledVector(uv1, _v3$1.x);
			target.addScaledVector(uv2, _v3$1.y);
			target.addScaledVector(uv3, _v3$1.z);
			return target;
		}

		static isFrontFacing(a, b, c, direction) {
			_v0$1.subVectors(c, b);

			_v1$3.subVectors(a, b); // strictly front facing


			return _v0$1.cross(_v1$3).dot(direction) < 0 ? true : false;
		}

		set(a, b, c) {
			this.a.copy(a);
			this.b.copy(b);
			this.c.copy(c);
			return this;
		}

		setFromPointsAndIndices(points, i0, i1, i2) {
			this.a.copy(points[i0]);
			this.b.copy(points[i1]);
			this.c.copy(points[i2]);
			return this;
		}

		setFromAttributeAndIndices(attribute, i0, i1, i2) {
			this.a.fromBufferAttribute(attribute, i0);
			this.b.fromBufferAttribute(attribute, i1);
			this.c.fromBufferAttribute(attribute, i2);
			return this;
		}

		clone() {
			return new this.constructor().copy(this);
		}

		copy(triangle) {
			this.a.copy(triangle.a);
			this.b.copy(triangle.b);
			this.c.copy(triangle.c);
			return this;
		}

		getArea() {
			_v0$1.subVectors(this.c, this.b);

			_v1$3.subVectors(this.a, this.b);

			return _v0$1.cross(_v1$3).length() * 0.5;
		}

		getMidpoint(target) {
			return target.addVectors(this.a, this.b).add(this.c).multiplyScalar(1 / 3);
		}

		getNormal(target) {
			return Triangle.getNormal(this.a, this.b, this.c, target);
		}

		getPlane(target) {
			return target.setFromCoplanarPoints(this.a, this.b, this.c);
		}

		getBarycoord(point, target) {
			return Triangle.getBarycoord(point, this.a, this.b, this.c, target);
		}

		getUV(point, uv1, uv2, uv3, target) {
			return Triangle.getUV(point, this.a, this.b, this.c, uv1, uv2, uv3, target);
		}

		containsPoint(point) {
			return Triangle.containsPoint(point, this.a, this.b, this.c);
		}

		isFrontFacing(direction) {
			return Triangle.isFrontFacing(this.a, this.b, this.c, direction);
		}

		intersectsBox(box) {
			return box.intersectsTriangle(this);
		}

		closestPointToPoint(p, target) {
			const a = this.a,
						b = this.b,
						c = this.c;
			let v, w; // algorithm thanks to Real-Time Collision Detection by Christer Ericson,
			// published by Morgan Kaufmann Publishers, (c) 2005 Elsevier Inc.,
			// under the accompanying license; see chapter 5.1.5 for detailed explanation.
			// basically, we're distinguishing which of the voronoi regions of the triangle
			// the point lies in with the minimum amount of redundant computation.

			_vab.subVectors(b, a);

			_vac.subVectors(c, a);

			_vap.subVectors(p, a);

			const d1 = _vab.dot(_vap);

			const d2 = _vac.dot(_vap);

			if (d1 <= 0 && d2 <= 0) {
				// vertex region of A; barycentric coords (1, 0, 0)
				return target.copy(a);
			}

			_vbp.subVectors(p, b);

			const d3 = _vab.dot(_vbp);

			const d4 = _vac.dot(_vbp);

			if (d3 >= 0 && d4 <= d3) {
				// vertex region of B; barycentric coords (0, 1, 0)
				return target.copy(b);
			}

			const vc = d1 * d4 - d3 * d2;

			if (vc <= 0 && d1 >= 0 && d3 <= 0) {
				v = d1 / (d1 - d3); // edge region of AB; barycentric coords (1-v, v, 0)

				return target.copy(a).addScaledVector(_vab, v);
			}

			_vcp.subVectors(p, c);

			const d5 = _vab.dot(_vcp);

			const d6 = _vac.dot(_vcp);

			if (d6 >= 0 && d5 <= d6) {
				// vertex region of C; barycentric coords (0, 0, 1)
				return target.copy(c);
			}

			const vb = d5 * d2 - d1 * d6;

			if (vb <= 0 && d2 >= 0 && d6 <= 0) {
				w = d2 / (d2 - d6); // edge region of AC; barycentric coords (1-w, 0, w)

				return target.copy(a).addScaledVector(_vac, w);
			}

			const va = d3 * d6 - d5 * d4;

			if (va <= 0 && d4 - d3 >= 0 && d5 - d6 >= 0) {
				_vbc.subVectors(c, b);

				w = (d4 - d3) / (d4 - d3 + (d5 - d6)); // edge region of BC; barycentric coords (0, 1-w, w)

				return target.copy(b).addScaledVector(_vbc, w); // edge region of BC
			} // face region


			const denom = 1 / (va + vb + vc); // u = va * denom

			v = vb * denom;
			w = vc * denom;
			return target.copy(a).addScaledVector(_vab, v).addScaledVector(_vac, w);
		}

		equals(triangle) {
			return triangle.a.equals(this.a) && triangle.b.equals(this.b) && triangle.c.equals(this.c);
		}

	}

	let materialId = 0;

	class Material extends EventDispatcher {
		constructor() {
			super();
			this.isMaterial = true;
			Object.defineProperty(this, 'id', {
				value: materialId++
			});
			this.uuid = generateUUID();
			this.name = '';
			this.type = 'Material';
			this.blending = NormalBlending;
			this.side = FrontSide;
			this.vertexColors = false;
			this.opacity = 1;
			this.transparent = false;
			this.blendSrc = SrcAlphaFactor;
			this.blendDst = OneMinusSrcAlphaFactor;
			this.blendEquation = AddEquation;
			this.blendSrcAlpha = null;
			this.blendDstAlpha = null;
			this.blendEquationAlpha = null;
			this.depthFunc = LessEqualDepth;
			this.depthTest = true;
			this.depthWrite = true;
			this.stencilWriteMask = 0xff;
			this.stencilFunc = AlwaysStencilFunc;
			this.stencilRef = 0;
			this.stencilFuncMask = 0xff;
			this.stencilFail = KeepStencilOp;
			this.stencilZFail = KeepStencilOp;
			this.stencilZPass = KeepStencilOp;
			this.stencilWrite = false;
			this.clippingPlanes = null;
			this.clipIntersection = false;
			this.clipShadows = false;
			this.shadowSide = null;
			this.colorWrite = true;
			this.precision = null; // override the renderer's default precision for this material

			this.polygonOffset = false;
			this.polygonOffsetFactor = 0;
			this.polygonOffsetUnits = 0;
			this.dithering = false;
			this.alphaToCoverage = false;
			this.premultipliedAlpha = false;
			this.visible = true;
			this.toneMapped = true;
			this.userData = {};
			this.version = 0;
			this._alphaTest = 0;
		}

		get alphaTest() {
			return this._alphaTest;
		}

		set alphaTest(value) {
			if (this._alphaTest > 0 !== value > 0) {
				this.version++;
			}

			this._alphaTest = value;
		}

		onBuild() {}

		onBeforeRender() {}

		onBeforeCompile() {}

		customProgramCacheKey() {
			return this.onBeforeCompile.toString();
		}

		setValues(values) {
			if (values === undefined) return;

			for (const key in values) {
				const newValue = values[key];

				if (newValue === undefined) {
					console.warn('THREE.Material: \'' + key + '\' parameter is undefined.');
					continue;
				} // for backward compatibility if shading is set in the constructor


				if (key === 'shading') {
					console.warn('THREE.' + this.type + ': .shading has been removed. Use the boolean .flatShading instead.');
					this.flatShading = newValue === FlatShading ? true : false;
					continue;
				}

				const currentValue = this[key];

				if (currentValue === undefined) {
					console.warn('THREE.' + this.type + ': \'' + key + '\' is not a property of this material.');
					continue;
				}

				if (currentValue && currentValue.isColor) {
					currentValue.set(newValue);
				} else if (currentValue && currentValue.isVector3 && newValue && newValue.isVector3) {
					currentValue.copy(newValue);
				} else {
					this[key] = newValue;
				}
			}
		}

		toJSON(meta) {
			const isRootObject = meta === undefined || typeof meta === 'string';

			if (isRootObject) {
				meta = {
					textures: {},
					images: {}
				};
			}

			const data = {
				metadata: {
					version: 4.5,
					type: 'Material',
					generator: 'Material.toJSON'
				}
			}; // standard Material serialization

			data.uuid = this.uuid;
			data.type = this.type;
			if (this.name !== '') data.name = this.name;
			if (this.color && this.color.isColor) data.color = this.color.getHex();
			if (this.roughness !== undefined) data.roughness = this.roughness;
			if (this.metalness !== undefined) data.metalness = this.metalness;
			if (this.sheen !== undefined) data.sheen = this.sheen;
			if (this.sheenColor && this.sheenColor.isColor) data.sheenColor = this.sheenColor.getHex();
			if (this.sheenRoughness !== undefined) data.sheenRoughness = this.sheenRoughness;
			if (this.emissive && this.emissive.isColor) data.emissive = this.emissive.getHex();
			if (this.emissiveIntensity && this.emissiveIntensity !== 1) data.emissiveIntensity = this.emissiveIntensity;
			if (this.specular && this.specular.isColor) data.specular = this.specular.getHex();
			if (this.specularIntensity !== undefined) data.specularIntensity = this.specularIntensity;
			if (this.specularColor && this.specularColor.isColor) data.specularColor = this.specularColor.getHex();
			if (this.shininess !== undefined) data.shininess = this.shininess;
			if (this.clearcoat !== undefined) data.clearcoat = this.clearcoat;
			if (this.clearcoatRoughness !== undefined) data.clearcoatRoughness = this.clearcoatRoughness;

			if (this.clearcoatMap && this.clearcoatMap.isTexture) {
				data.clearcoatMap = this.clearcoatMap.toJSON(meta).uuid;
			}

			if (this.clearcoatRoughnessMap && this.clearcoatRoughnessMap.isTexture) {
				data.clearcoatRoughnessMap = this.clearcoatRoughnessMap.toJSON(meta).uuid;
			}

			if (this.clearcoatNormalMap && this.clearcoatNormalMap.isTexture) {
				data.clearcoatNormalMap = this.clearcoatNormalMap.toJSON(meta).uuid;
				data.clearcoatNormalScale = this.clearcoatNormalScale.toArray();
			}

			if (this.iridescence !== undefined) data.iridescence = this.iridescence;
			if (this.iridescenceIOR !== undefined) data.iridescenceIOR = this.iridescenceIOR;
			if (this.iridescenceThicknessRange !== undefined) data.iridescenceThicknessRange = this.iridescenceThicknessRange;

			if (this.iridescenceMap && this.iridescenceMap.isTexture) {
				data.iridescenceMap = this.iridescenceMap.toJSON(meta).uuid;
			}

			if (this.iridescenceThicknessMap && this.iridescenceThicknessMap.isTexture) {
				data.iridescenceThicknessMap = this.iridescenceThicknessMap.toJSON(meta).uuid;
			}

			if (this.map && this.map.isTexture) data.map = this.map.toJSON(meta).uuid;
			if (this.matcap && this.matcap.isTexture) data.matcap = this.matcap.toJSON(meta).uuid;
			if (this.alphaMap && this.alphaMap.isTexture) data.alphaMap = this.alphaMap.toJSON(meta).uuid;

			if (this.lightMap && this.lightMap.isTexture) {
				data.lightMap = this.lightMap.toJSON(meta).uuid;
				data.lightMapIntensity = this.lightMapIntensity;
			}

			if (this.aoMap && this.aoMap.isTexture) {
				data.aoMap = this.aoMap.toJSON(meta).uuid;
				data.aoMapIntensity = this.aoMapIntensity;
			}

			if (this.bumpMap && this.bumpMap.isTexture) {
				data.bumpMap = this.bumpMap.toJSON(meta).uuid;
				data.bumpScale = this.bumpScale;
			}

			if (this.normalMap && this.normalMap.isTexture) {
				data.normalMap = this.normalMap.toJSON(meta).uuid;
				data.normalMapType = this.normalMapType;
				data.normalScale = this.normalScale.toArray();
			}

			if (this.displacementMap && this.displacementMap.isTexture) {
				data.displacementMap = this.displacementMap.toJSON(meta).uuid;
				data.displacementScale = this.displacementScale;
				data.displacementBias = this.displacementBias;
			}

			if (this.roughnessMap && this.roughnessMap.isTexture) data.roughnessMap = this.roughnessMap.toJSON(meta).uuid;
			if (this.metalnessMap && this.metalnessMap.isTexture) data.metalnessMap = this.metalnessMap.toJSON(meta).uuid;
			if (this.emissiveMap && this.emissiveMap.isTexture) data.emissiveMap = this.emissiveMap.toJSON(meta).uuid;
			if (this.specularMap && this.specularMap.isTexture) data.specularMap = this.specularMap.toJSON(meta).uuid;
			if (this.specularIntensityMap && this.specularIntensityMap.isTexture) data.specularIntensityMap = this.specularIntensityMap.toJSON(meta).uuid;
			if (this.specularColorMap && this.specularColorMap.isTexture) data.specularColorMap = this.specularColorMap.toJSON(meta).uuid;

			if (this.envMap && this.envMap.isTexture) {
				data.envMap = this.envMap.toJSON(meta).uuid;
				if (this.combine !== undefined) data.combine = this.combine;
			}

			if (this.envMapIntensity !== undefined) data.envMapIntensity = this.envMapIntensity;
			if (this.reflectivity !== undefined) data.reflectivity = this.reflectivity;
			if (this.refractionRatio !== undefined) data.refractionRatio = this.refractionRatio;

			if (this.gradientMap && this.gradientMap.isTexture) {
				data.gradientMap = this.gradientMap.toJSON(meta).uuid;
			}

			if (this.transmission !== undefined) data.transmission = this.transmission;
			if (this.transmissionMap && this.transmissionMap.isTexture) data.transmissionMap = this.transmissionMap.toJSON(meta).uuid;
			if (this.thickness !== undefined) data.thickness = this.thickness;
			if (this.thicknessMap && this.thicknessMap.isTexture) data.thicknessMap = this.thicknessMap.toJSON(meta).uuid;
			if (this.attenuationDistance !== undefined) data.attenuationDistance = this.attenuationDistance;
			if (this.attenuationColor !== undefined) data.attenuationColor = this.attenuationColor.getHex();
			if (this.size !== undefined) data.size = this.size;
			if (this.shadowSide !== null) data.shadowSide = this.shadowSide;
			if (this.sizeAttenuation !== undefined) data.sizeAttenuation = this.sizeAttenuation;
			if (this.blending !== NormalBlending) data.blending = this.blending;
			if (this.side !== FrontSide) data.side = this.side;
			if (this.vertexColors) data.vertexColors = true;
			if (this.opacity < 1) data.opacity = this.opacity;
			if (this.transparent === true) data.transparent = this.transparent;
			data.depthFunc = this.depthFunc;
			data.depthTest = this.depthTest;
			data.depthWrite = this.depthWrite;
			data.colorWrite = this.colorWrite;
			data.stencilWrite = this.stencilWrite;
			data.stencilWriteMask = this.stencilWriteMask;
			data.stencilFunc = this.stencilFunc;
			data.stencilRef = this.stencilRef;
			data.stencilFuncMask = this.stencilFuncMask;
			data.stencilFail = this.stencilFail;
			data.stencilZFail = this.stencilZFail;
			data.stencilZPass = this.stencilZPass; // rotation (SpriteMaterial)

			if (this.rotation !== undefined && this.rotation !== 0) data.rotation = this.rotation;
			if (this.polygonOffset === true) data.polygonOffset = true;
			if (this.polygonOffsetFactor !== 0) data.polygonOffsetFactor = this.polygonOffsetFactor;
			if (this.polygonOffsetUnits !== 0) data.polygonOffsetUnits = this.polygonOffsetUnits;
			if (this.linewidth !== undefined && this.linewidth !== 1) data.linewidth = this.linewidth;
			if (this.dashSize !== undefined) data.dashSize = this.dashSize;
			if (this.gapSize !== undefined) data.gapSize = this.gapSize;
			if (this.scale !== undefined) data.scale = this.scale;
			if (this.dithering === true) data.dithering = true;
			if (this.alphaTest > 0) data.alphaTest = this.alphaTest;
			if (this.alphaToCoverage === true) data.alphaToCoverage = this.alphaToCoverage;
			if (this.premultipliedAlpha === true) data.premultipliedAlpha = this.premultipliedAlpha;
			if (this.wireframe === true) data.wireframe = this.wireframe;
			if (this.wireframeLinewidth > 1) data.wireframeLinewidth = this.wireframeLinewidth;
			if (this.wireframeLinecap !== 'round') data.wireframeLinecap = this.wireframeLinecap;
			if (this.wireframeLinejoin !== 'round') data.wireframeLinejoin = this.wireframeLinejoin;
			if (this.flatShading === true) data.flatShading = this.flatShading;
			if (this.visible === false) data.visible = false;
			if (this.toneMapped === false) data.toneMapped = false;
			if (this.fog === false) data.fog = false;
			if (JSON.stringify(this.userData) !== '{}') data.userData = this.userData; // TODO: Copied from Object3D.toJSON

			function extractFromCache(cache) {
				const values = [];

				for (const key in cache) {
					const data = cache[key];
					delete data.metadata;
					values.push(data);
				}

				return values;
			}

			if (isRootObject) {
				const textures = extractFromCache(meta.textures);
				const images = extractFromCache(meta.images);
				if (textures.length > 0) data.textures = textures;
				if (images.length > 0) data.images = images;
			}

			return data;
		}

		clone() {
			return new this.constructor().copy(this);
		}

		copy(source) {
			this.name = source.name;
			this.blending = source.blending;
			this.side = source.side;
			this.vertexColors = source.vertexColors;
			this.opacity = source.opacity;
			this.transparent = source.transparent;
			this.blendSrc = source.blendSrc;
			this.blendDst = source.blendDst;
			this.blendEquation = source.blendEquation;
			this.blendSrcAlpha = source.blendSrcAlpha;
			this.blendDstAlpha = source.blendDstAlpha;
			this.blendEquationAlpha = source.blendEquationAlpha;
			this.depthFunc = source.depthFunc;
			this.depthTest = source.depthTest;
			this.depthWrite = source.depthWrite;
			this.stencilWriteMask = source.stencilWriteMask;
			this.stencilFunc = source.stencilFunc;
			this.stencilRef = source.stencilRef;
			this.stencilFuncMask = source.stencilFuncMask;
			this.stencilFail = source.stencilFail;
			this.stencilZFail = source.stencilZFail;
			this.stencilZPass = source.stencilZPass;
			this.stencilWrite = source.stencilWrite;
			const srcPlanes = source.clippingPlanes;
			let dstPlanes = null;

			if (srcPlanes !== null) {
				const n = srcPlanes.length;
				dstPlanes = new Array(n);

				for (let i = 0; i !== n; ++i) {
					dstPlanes[i] = srcPlanes[i].clone();
				}
			}

			this.clippingPlanes = dstPlanes;
			this.clipIntersection = source.clipIntersection;
			this.clipShadows = source.clipShadows;
			this.shadowSide = source.shadowSide;
			this.colorWrite = source.colorWrite;
			this.precision = source.precision;
			this.polygonOffset = source.polygonOffset;
			this.polygonOffsetFactor = source.polygonOffsetFactor;
			this.polygonOffsetUnits = source.polygonOffsetUnits;
			this.dithering = source.dithering;
			this.alphaTest = source.alphaTest;
			this.alphaToCoverage = source.alphaToCoverage;
			this.premultipliedAlpha = source.premultipliedAlpha;
			this.visible = source.visible;
			this.toneMapped = source.toneMapped;
			this.userData = JSON.parse(JSON.stringify(source.userData));
			return this;
		}

		dispose() {
			this.dispatchEvent({
				type: 'dispose'
			});
		}

		set needsUpdate(value) {
			if (value === true) this.version++;
		}

	}

	class MeshBasicMaterial extends Material {
		constructor(parameters) {
			super();
			this.isMeshBasicMaterial = true;
			this.type = 'MeshBasicMaterial';
			this.color = new Color(0xffffff); // emissive

			this.map = null;
			this.lightMap = null;
			this.lightMapIntensity = 1.0;
			this.aoMap = null;
			this.aoMapIntensity = 1.0;
			this.specularMap = null;
			this.alphaMap = null;
			this.envMap = null;
			this.combine = MultiplyOperation;
			this.reflectivity = 1;
			this.refractionRatio = 0.98;
			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.wireframeLinecap = 'round';
			this.wireframeLinejoin = 'round';
			this.fog = true;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.color.copy(source.color);
			this.map = source.map;
			this.lightMap = source.lightMap;
			this.lightMapIntensity = source.lightMapIntensity;
			this.aoMap = source.aoMap;
			this.aoMapIntensity = source.aoMapIntensity;
			this.specularMap = source.specularMap;
			this.alphaMap = source.alphaMap;
			this.envMap = source.envMap;
			this.combine = source.combine;
			this.reflectivity = source.reflectivity;
			this.refractionRatio = source.refractionRatio;
			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.wireframeLinecap = source.wireframeLinecap;
			this.wireframeLinejoin = source.wireframeLinejoin;
			this.fog = source.fog;
			return this;
		}

	}

	const _vector$9 = /*@__PURE__*/new Vector3();

	const _vector2$1 = /*@__PURE__*/new Vector2();

	class BufferAttribute {
		constructor(array, itemSize, normalized) {
			if (Array.isArray(array)) {
				throw new TypeError('THREE.BufferAttribute: array should be a Typed Array.');
			}

			this.isBufferAttribute = true;
			this.name = '';
			this.array = array;
			this.itemSize = itemSize;
			this.count = array !== undefined ? array.length / itemSize : 0;
			this.normalized = normalized === true;
			this.usage = StaticDrawUsage;
			this.updateRange = {
				offset: 0,
				count: -1
			};
			this.version = 0;
		}

		onUploadCallback() {}

		set needsUpdate(value) {
			if (value === true) this.version++;
		}

		setUsage(value) {
			this.usage = value;
			return this;
		}

		copy(source) {
			this.name = source.name;
			this.array = new source.array.constructor(source.array);
			this.itemSize = source.itemSize;
			this.count = source.count;
			this.normalized = source.normalized;
			this.usage = source.usage;
			return this;
		}

		copyAt(index1, attribute, index2) {
			index1 *= this.itemSize;
			index2 *= attribute.itemSize;

			for (let i = 0, l = this.itemSize; i < l; i++) {
				this.array[index1 + i] = attribute.array[index2 + i];
			}

			return this;
		}

		copyArray(array) {
			this.array.set(array);
			return this;
		}

		copyColorsArray(colors) {
			const array = this.array;
			let offset = 0;

			for (let i = 0, l = colors.length; i < l; i++) {
				let color = colors[i];

				if (color === undefined) {
					console.warn('THREE.BufferAttribute.copyColorsArray(): color is undefined', i);
					color = new Color();
				}

				array[offset++] = color.r;
				array[offset++] = color.g;
				array[offset++] = color.b;
			}

			return this;
		}

		copyVector2sArray(vectors) {
			const array = this.array;
			let offset = 0;

			for (let i = 0, l = vectors.length; i < l; i++) {
				let vector = vectors[i];

				if (vector === undefined) {
					console.warn('THREE.BufferAttribute.copyVector2sArray(): vector is undefined', i);
					vector = new Vector2();
				}

				array[offset++] = vector.x;
				array[offset++] = vector.y;
			}

			return this;
		}

		copyVector3sArray(vectors) {
			const array = this.array;
			let offset = 0;

			for (let i = 0, l = vectors.length; i < l; i++) {
				let vector = vectors[i];

				if (vector === undefined) {
					console.warn('THREE.BufferAttribute.copyVector3sArray(): vector is undefined', i);
					vector = new Vector3();
				}

				array[offset++] = vector.x;
				array[offset++] = vector.y;
				array[offset++] = vector.z;
			}

			return this;
		}

		copyVector4sArray(vectors) {
			const array = this.array;
			let offset = 0;

			for (let i = 0, l = vectors.length; i < l; i++) {
				let vector = vectors[i];

				if (vector === undefined) {
					console.warn('THREE.BufferAttribute.copyVector4sArray(): vector is undefined', i);
					vector = new Vector4();
				}

				array[offset++] = vector.x;
				array[offset++] = vector.y;
				array[offset++] = vector.z;
				array[offset++] = vector.w;
			}

			return this;
		}

		applyMatrix3(m) {
			if (this.itemSize === 2) {
				for (let i = 0, l = this.count; i < l; i++) {
					_vector2$1.fromBufferAttribute(this, i);

					_vector2$1.applyMatrix3(m);

					this.setXY(i, _vector2$1.x, _vector2$1.y);
				}
			} else if (this.itemSize === 3) {
				for (let i = 0, l = this.count; i < l; i++) {
					_vector$9.fromBufferAttribute(this, i);

					_vector$9.applyMatrix3(m);

					this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
				}
			}

			return this;
		}

		applyMatrix4(m) {
			for (let i = 0, l = this.count; i < l; i++) {
				_vector$9.fromBufferAttribute(this, i);

				_vector$9.applyMatrix4(m);

				this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
			}

			return this;
		}

		applyNormalMatrix(m) {
			for (let i = 0, l = this.count; i < l; i++) {
				_vector$9.fromBufferAttribute(this, i);

				_vector$9.applyNormalMatrix(m);

				this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
			}

			return this;
		}

		transformDirection(m) {
			for (let i = 0, l = this.count; i < l; i++) {
				_vector$9.fromBufferAttribute(this, i);

				_vector$9.transformDirection(m);

				this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
			}

			return this;
		}

		set(value, offset = 0) {
			this.array.set(value, offset);
			return this;
		}

		getX(index) {
			return this.array[index * this.itemSize];
		}

		setX(index, x) {
			this.array[index * this.itemSize] = x;
			return this;
		}

		getY(index) {
			return this.array[index * this.itemSize + 1];
		}

		setY(index, y) {
			this.array[index * this.itemSize + 1] = y;
			return this;
		}

		getZ(index) {
			return this.array[index * this.itemSize + 2];
		}

		setZ(index, z) {
			this.array[index * this.itemSize + 2] = z;
			return this;
		}

		getW(index) {
			return this.array[index * this.itemSize + 3];
		}

		setW(index, w) {
			this.array[index * this.itemSize + 3] = w;
			return this;
		}

		setXY(index, x, y) {
			index *= this.itemSize;
			this.array[index + 0] = x;
			this.array[index + 1] = y;
			return this;
		}

		setXYZ(index, x, y, z) {
			index *= this.itemSize;
			this.array[index + 0] = x;
			this.array[index + 1] = y;
			this.array[index + 2] = z;
			return this;
		}

		setXYZW(index, x, y, z, w) {
			index *= this.itemSize;
			this.array[index + 0] = x;
			this.array[index + 1] = y;
			this.array[index + 2] = z;
			this.array[index + 3] = w;
			return this;
		}

		onUpload(callback) {
			this.onUploadCallback = callback;
			return this;
		}

		clone() {
			return new this.constructor(this.array, this.itemSize).copy(this);
		}

		toJSON() {
			const data = {
				itemSize: this.itemSize,
				type: this.array.constructor.name,
				array: Array.from(this.array),
				normalized: this.normalized
			};
			if (this.name !== '') data.name = this.name;
			if (this.usage !== StaticDrawUsage) data.usage = this.usage;
			if (this.updateRange.offset !== 0 || this.updateRange.count !== -1) data.updateRange = this.updateRange;
			return data;
		}

	} //


	class Int8BufferAttribute extends BufferAttribute {
		constructor(array, itemSize, normalized) {
			super(new Int8Array(array), itemSize, normalized);
		}

	}

	class Uint8BufferAttribute extends BufferAttribute {
		constructor(array, itemSize, normalized) {
			super(new Uint8Array(array), itemSize, normalized);
		}

	}

	class Uint8ClampedBufferAttribute extends BufferAttribute {
		constructor(array, itemSize, normalized) {
			super(new Uint8ClampedArray(array), itemSize, normalized);
		}

	}

	class Int16BufferAttribute extends BufferAttribute {
		constructor(array, itemSize, normalized) {
			super(new Int16Array(array), itemSize, normalized);
		}

	}

	class Uint16BufferAttribute extends BufferAttribute {
		constructor(array, itemSize, normalized) {
			super(new Uint16Array(array), itemSize, normalized);
		}

	}

	class Int32BufferAttribute extends BufferAttribute {
		constructor(array, itemSize, normalized) {
			super(new Int32Array(array), itemSize, normalized);
		}

	}

	class Uint32BufferAttribute extends BufferAttribute {
		constructor(array, itemSize, normalized) {
			super(new Uint32Array(array), itemSize, normalized);
		}

	}

	class Float16BufferAttribute extends BufferAttribute {
		constructor(array, itemSize, normalized) {
			super(new Uint16Array(array), itemSize, normalized);
			this.isFloat16BufferAttribute = true;
		}

	}

	class Float32BufferAttribute extends BufferAttribute {
		constructor(array, itemSize, normalized) {
			super(new Float32Array(array), itemSize, normalized);
		}

	}

	class Float64BufferAttribute extends BufferAttribute {
		constructor(array, itemSize, normalized) {
			super(new Float64Array(array), itemSize, normalized);
		}

	} //

	let _id$1 = 0;

	const _m1 = /*@__PURE__*/new Matrix4();

	const _obj = /*@__PURE__*/new Object3D();

	const _offset = /*@__PURE__*/new Vector3();

	const _box$1 = /*@__PURE__*/new Box3();

	const _boxMorphTargets = /*@__PURE__*/new Box3();

	const _vector$8 = /*@__PURE__*/new Vector3();

	class BufferGeometry extends EventDispatcher {
		constructor() {
			super();
			this.isBufferGeometry = true;
			Object.defineProperty(this, 'id', {
				value: _id$1++
			});
			this.uuid = generateUUID();
			this.name = '';
			this.type = 'BufferGeometry';
			this.index = null;
			this.attributes = {};
			this.morphAttributes = {};
			this.morphTargetsRelative = false;
			this.groups = [];
			this.boundingBox = null;
			this.boundingSphere = null;
			this.drawRange = {
				start: 0,
				count: Infinity
			};
			this.userData = {};
		}

		getIndex() {
			return this.index;
		}

		setIndex(index) {
			if (Array.isArray(index)) {
				this.index = new (arrayNeedsUint32(index) ? Uint32BufferAttribute : Uint16BufferAttribute)(index, 1);
			} else {
				this.index = index;
			}

			return this;
		}

		getAttribute(name) {
			return this.attributes[name];
		}

		setAttribute(name, attribute) {
			this.attributes[name] = attribute;
			return this;
		}

		deleteAttribute(name) {
			delete this.attributes[name];
			return this;
		}

		hasAttribute(name) {
			return this.attributes[name] !== undefined;
		}

		addGroup(start, count, materialIndex = 0) {
			this.groups.push({
				start: start,
				count: count,
				materialIndex: materialIndex
			});
		}

		clearGroups() {
			this.groups = [];
		}

		setDrawRange(start, count) {
			this.drawRange.start = start;
			this.drawRange.count = count;
		}

		applyMatrix4(matrix) {
			const position = this.attributes.position;

			if (position !== undefined) {
				position.applyMatrix4(matrix);
				position.needsUpdate = true;
			}

			const normal = this.attributes.normal;

			if (normal !== undefined) {
				const normalMatrix = new Matrix3().getNormalMatrix(matrix);
				normal.applyNormalMatrix(normalMatrix);
				normal.needsUpdate = true;
			}

			const tangent = this.attributes.tangent;

			if (tangent !== undefined) {
				tangent.transformDirection(matrix);
				tangent.needsUpdate = true;
			}

			if (this.boundingBox !== null) {
				this.computeBoundingBox();
			}

			if (this.boundingSphere !== null) {
				this.computeBoundingSphere();
			}

			return this;
		}

		applyQuaternion(q) {
			_m1.makeRotationFromQuaternion(q);

			this.applyMatrix4(_m1);
			return this;
		}

		rotateX(angle) {
			// rotate geometry around world x-axis
			_m1.makeRotationX(angle);

			this.applyMatrix4(_m1);
			return this;
		}

		rotateY(angle) {
			// rotate geometry around world y-axis
			_m1.makeRotationY(angle);

			this.applyMatrix4(_m1);
			return this;
		}

		rotateZ(angle) {
			// rotate geometry around world z-axis
			_m1.makeRotationZ(angle);

			this.applyMatrix4(_m1);
			return this;
		}

		translate(x, y, z) {
			// translate geometry
			_m1.makeTranslation(x, y, z);

			this.applyMatrix4(_m1);
			return this;
		}

		scale(x, y, z) {
			// scale geometry
			_m1.makeScale(x, y, z);

			this.applyMatrix4(_m1);
			return this;
		}

		lookAt(vector) {
			_obj.lookAt(vector);

			_obj.updateMatrix();

			this.applyMatrix4(_obj.matrix);
			return this;
		}

		center() {
			this.computeBoundingBox();
			this.boundingBox.getCenter(_offset).negate();
			this.translate(_offset.x, _offset.y, _offset.z);
			return this;
		}

		setFromPoints(points) {
			const position = [];

			for (let i = 0, l = points.length; i < l; i++) {
				const point = points[i];
				position.push(point.x, point.y, point.z || 0);
			}

			this.setAttribute('position', new Float32BufferAttribute(position, 3));
			return this;
		}

		computeBoundingBox() {
			if (this.boundingBox === null) {
				this.boundingBox = new Box3();
			}

			const position = this.attributes.position;
			const morphAttributesPosition = this.morphAttributes.position;

			if (position && position.isGLBufferAttribute) {
				console.error('THREE.BufferGeometry.computeBoundingBox(): GLBufferAttribute requires a manual bounding box. Alternatively set "mesh.frustumCulled" to "false".', this);
				this.boundingBox.set(new Vector3(-Infinity, -Infinity, -Infinity), new Vector3(+Infinity, +Infinity, +Infinity));
				return;
			}

			if (position !== undefined) {
				this.boundingBox.setFromBufferAttribute(position); // process morph attributes if present

				if (morphAttributesPosition) {
					for (let i = 0, il = morphAttributesPosition.length; i < il; i++) {
						const morphAttribute = morphAttributesPosition[i];

						_box$1.setFromBufferAttribute(morphAttribute);

						if (this.morphTargetsRelative) {
							_vector$8.addVectors(this.boundingBox.min, _box$1.min);

							this.boundingBox.expandByPoint(_vector$8);

							_vector$8.addVectors(this.boundingBox.max, _box$1.max);

							this.boundingBox.expandByPoint(_vector$8);
						} else {
							this.boundingBox.expandByPoint(_box$1.min);
							this.boundingBox.expandByPoint(_box$1.max);
						}
					}
				}
			} else {
				this.boundingBox.makeEmpty();
			}

			if (isNaN(this.boundingBox.min.x) || isNaN(this.boundingBox.min.y) || isNaN(this.boundingBox.min.z)) {
				console.error('THREE.BufferGeometry.computeBoundingBox(): Computed min/max have NaN values. The "position" attribute is likely to have NaN values.', this);
			}
		}

		computeBoundingSphere() {
			if (this.boundingSphere === null) {
				this.boundingSphere = new Sphere();
			}

			const position = this.attributes.position;
			const morphAttributesPosition = this.morphAttributes.position;

			if (position && position.isGLBufferAttribute) {
				console.error('THREE.BufferGeometry.computeBoundingSphere(): GLBufferAttribute requires a manual bounding sphere. Alternatively set "mesh.frustumCulled" to "false".', this);
				this.boundingSphere.set(new Vector3(), Infinity);
				return;
			}

			if (position) {
				// first, find the center of the bounding sphere
				const center = this.boundingSphere.center;

				_box$1.setFromBufferAttribute(position); // process morph attributes if present


				if (morphAttributesPosition) {
					for (let i = 0, il = morphAttributesPosition.length; i < il; i++) {
						const morphAttribute = morphAttributesPosition[i];

						_boxMorphTargets.setFromBufferAttribute(morphAttribute);

						if (this.morphTargetsRelative) {
							_vector$8.addVectors(_box$1.min, _boxMorphTargets.min);

							_box$1.expandByPoint(_vector$8);

							_vector$8.addVectors(_box$1.max, _boxMorphTargets.max);

							_box$1.expandByPoint(_vector$8);
						} else {
							_box$1.expandByPoint(_boxMorphTargets.min);

							_box$1.expandByPoint(_boxMorphTargets.max);
						}
					}
				}

				_box$1.getCenter(center); // second, try to find a boundingSphere with a radius smaller than the
				// boundingSphere of the boundingBox: sqrt(3) smaller in the best case


				let maxRadiusSq = 0;

				for (let i = 0, il = position.count; i < il; i++) {
					_vector$8.fromBufferAttribute(position, i);

					maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(_vector$8));
				} // process morph attributes if present


				if (morphAttributesPosition) {
					for (let i = 0, il = morphAttributesPosition.length; i < il; i++) {
						const morphAttribute = morphAttributesPosition[i];
						const morphTargetsRelative = this.morphTargetsRelative;

						for (let j = 0, jl = morphAttribute.count; j < jl; j++) {
							_vector$8.fromBufferAttribute(morphAttribute, j);

							if (morphTargetsRelative) {
								_offset.fromBufferAttribute(position, j);

								_vector$8.add(_offset);
							}

							maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(_vector$8));
						}
					}
				}

				this.boundingSphere.radius = Math.sqrt(maxRadiusSq);

				if (isNaN(this.boundingSphere.radius)) {
					console.error('THREE.BufferGeometry.computeBoundingSphere(): Computed radius is NaN. The "position" attribute is likely to have NaN values.', this);
				}
			}
		}

		computeTangents() {
			const index = this.index;
			const attributes = this.attributes; // based on http://www.terathon.com/code/tangent.html
			// (per vertex tangents)

			if (index === null || attributes.position === undefined || attributes.normal === undefined || attributes.uv === undefined) {
				console.error('THREE.BufferGeometry: .computeTangents() failed. Missing required attributes (index, position, normal or uv)');
				return;
			}

			const indices = index.array;
			const positions = attributes.position.array;
			const normals = attributes.normal.array;
			const uvs = attributes.uv.array;
			const nVertices = positions.length / 3;

			if (this.hasAttribute('tangent') === false) {
				this.setAttribute('tangent', new BufferAttribute(new Float32Array(4 * nVertices), 4));
			}

			const tangents = this.getAttribute('tangent').array;
			const tan1 = [],
						tan2 = [];

			for (let i = 0; i < nVertices; i++) {
				tan1[i] = new Vector3();
				tan2[i] = new Vector3();
			}

			const vA = new Vector3(),
						vB = new Vector3(),
						vC = new Vector3(),
						uvA = new Vector2(),
						uvB = new Vector2(),
						uvC = new Vector2(),
						sdir = new Vector3(),
						tdir = new Vector3();

			function handleTriangle(a, b, c) {
				vA.fromArray(positions, a * 3);
				vB.fromArray(positions, b * 3);
				vC.fromArray(positions, c * 3);
				uvA.fromArray(uvs, a * 2);
				uvB.fromArray(uvs, b * 2);
				uvC.fromArray(uvs, c * 2);
				vB.sub(vA);
				vC.sub(vA);
				uvB.sub(uvA);
				uvC.sub(uvA);
				const r = 1.0 / (uvB.x * uvC.y - uvC.x * uvB.y); // silently ignore degenerate uv triangles having coincident or colinear vertices

				if (!isFinite(r)) return;
				sdir.copy(vB).multiplyScalar(uvC.y).addScaledVector(vC, -uvB.y).multiplyScalar(r);
				tdir.copy(vC).multiplyScalar(uvB.x).addScaledVector(vB, -uvC.x).multiplyScalar(r);
				tan1[a].add(sdir);
				tan1[b].add(sdir);
				tan1[c].add(sdir);
				tan2[a].add(tdir);
				tan2[b].add(tdir);
				tan2[c].add(tdir);
			}

			let groups = this.groups;

			if (groups.length === 0) {
				groups = [{
					start: 0,
					count: indices.length
				}];
			}

			for (let i = 0, il = groups.length; i < il; ++i) {
				const group = groups[i];
				const start = group.start;
				const count = group.count;

				for (let j = start, jl = start + count; j < jl; j += 3) {
					handleTriangle(indices[j + 0], indices[j + 1], indices[j + 2]);
				}
			}

			const tmp = new Vector3(),
						tmp2 = new Vector3();
			const n = new Vector3(),
						n2 = new Vector3();

			function handleVertex(v) {
				n.fromArray(normals, v * 3);
				n2.copy(n);
				const t = tan1[v]; // Gram-Schmidt orthogonalize

				tmp.copy(t);
				tmp.sub(n.multiplyScalar(n.dot(t))).normalize(); // Calculate handedness

				tmp2.crossVectors(n2, t);
				const test = tmp2.dot(tan2[v]);
				const w = test < 0.0 ? -1.0 : 1.0;
				tangents[v * 4] = tmp.x;
				tangents[v * 4 + 1] = tmp.y;
				tangents[v * 4 + 2] = tmp.z;
				tangents[v * 4 + 3] = w;
			}

			for (let i = 0, il = groups.length; i < il; ++i) {
				const group = groups[i];
				const start = group.start;
				const count = group.count;

				for (let j = start, jl = start + count; j < jl; j += 3) {
					handleVertex(indices[j + 0]);
					handleVertex(indices[j + 1]);
					handleVertex(indices[j + 2]);
				}
			}
		}

		computeVertexNormals() {
			const index = this.index;
			const positionAttribute = this.getAttribute('position');

			if (positionAttribute !== undefined) {
				let normalAttribute = this.getAttribute('normal');

				if (normalAttribute === undefined) {
					normalAttribute = new BufferAttribute(new Float32Array(positionAttribute.count * 3), 3);
					this.setAttribute('normal', normalAttribute);
				} else {
					// reset existing normals to zero
					for (let i = 0, il = normalAttribute.count; i < il; i++) {
						normalAttribute.setXYZ(i, 0, 0, 0);
					}
				}

				const pA = new Vector3(),
							pB = new Vector3(),
							pC = new Vector3();
				const nA = new Vector3(),
							nB = new Vector3(),
							nC = new Vector3();
				const cb = new Vector3(),
							ab = new Vector3(); // indexed elements

				if (index) {
					for (let i = 0, il = index.count; i < il; i += 3) {
						const vA = index.getX(i + 0);
						const vB = index.getX(i + 1);
						const vC = index.getX(i + 2);
						pA.fromBufferAttribute(positionAttribute, vA);
						pB.fromBufferAttribute(positionAttribute, vB);
						pC.fromBufferAttribute(positionAttribute, vC);
						cb.subVectors(pC, pB);
						ab.subVectors(pA, pB);
						cb.cross(ab);
						nA.fromBufferAttribute(normalAttribute, vA);
						nB.fromBufferAttribute(normalAttribute, vB);
						nC.fromBufferAttribute(normalAttribute, vC);
						nA.add(cb);
						nB.add(cb);
						nC.add(cb);
						normalAttribute.setXYZ(vA, nA.x, nA.y, nA.z);
						normalAttribute.setXYZ(vB, nB.x, nB.y, nB.z);
						normalAttribute.setXYZ(vC, nC.x, nC.y, nC.z);
					}
				} else {
					// non-indexed elements (unconnected triangle soup)
					for (let i = 0, il = positionAttribute.count; i < il; i += 3) {
						pA.fromBufferAttribute(positionAttribute, i + 0);
						pB.fromBufferAttribute(positionAttribute, i + 1);
						pC.fromBufferAttribute(positionAttribute, i + 2);
						cb.subVectors(pC, pB);
						ab.subVectors(pA, pB);
						cb.cross(ab);
						normalAttribute.setXYZ(i + 0, cb.x, cb.y, cb.z);
						normalAttribute.setXYZ(i + 1, cb.x, cb.y, cb.z);
						normalAttribute.setXYZ(i + 2, cb.x, cb.y, cb.z);
					}
				}

				this.normalizeNormals();
				normalAttribute.needsUpdate = true;
			}
		}

		merge(geometry, offset) {
			if (!(geometry && geometry.isBufferGeometry)) {
				console.error('THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.', geometry);
				return;
			}

			if (offset === undefined) {
				offset = 0;
				console.warn('THREE.BufferGeometry.merge(): Overwriting original geometry, starting at offset=0. ' + 'Use BufferGeometryUtils.mergeBufferGeometries() for lossless merge.');
			}

			const attributes = this.attributes;

			for (const key in attributes) {
				if (geometry.attributes[key] === undefined) continue;
				const attribute1 = attributes[key];
				const attributeArray1 = attribute1.array;
				const attribute2 = geometry.attributes[key];
				const attributeArray2 = attribute2.array;
				const attributeOffset = attribute2.itemSize * offset;
				const length = Math.min(attributeArray2.length, attributeArray1.length - attributeOffset);

				for (let i = 0, j = attributeOffset; i < length; i++, j++) {
					attributeArray1[j] = attributeArray2[i];
				}
			}

			return this;
		}

		normalizeNormals() {
			const normals = this.attributes.normal;

			for (let i = 0, il = normals.count; i < il; i++) {
				_vector$8.fromBufferAttribute(normals, i);

				_vector$8.normalize();

				normals.setXYZ(i, _vector$8.x, _vector$8.y, _vector$8.z);
			}
		}

		toNonIndexed() {
			function convertBufferAttribute(attribute, indices) {
				const array = attribute.array;
				const itemSize = attribute.itemSize;
				const normalized = attribute.normalized;
				const array2 = new array.constructor(indices.length * itemSize);
				let index = 0,
						index2 = 0;

				for (let i = 0, l = indices.length; i < l; i++) {
					if (attribute.isInterleavedBufferAttribute) {
						index = indices[i] * attribute.data.stride + attribute.offset;
					} else {
						index = indices[i] * itemSize;
					}

					for (let j = 0; j < itemSize; j++) {
						array2[index2++] = array[index++];
					}
				}

				return new BufferAttribute(array2, itemSize, normalized);
			} //


			if (this.index === null) {
				console.warn('THREE.BufferGeometry.toNonIndexed(): BufferGeometry is already non-indexed.');
				return this;
			}

			const geometry2 = new BufferGeometry();
			const indices = this.index.array;
			const attributes = this.attributes; // attributes

			for (const name in attributes) {
				const attribute = attributes[name];
				const newAttribute = convertBufferAttribute(attribute, indices);
				geometry2.setAttribute(name, newAttribute);
			} // morph attributes


			const morphAttributes = this.morphAttributes;

			for (const name in morphAttributes) {
				const morphArray = [];
				const morphAttribute = morphAttributes[name]; // morphAttribute: array of Float32BufferAttributes

				for (let i = 0, il = morphAttribute.length; i < il; i++) {
					const attribute = morphAttribute[i];
					const newAttribute = convertBufferAttribute(attribute, indices);
					morphArray.push(newAttribute);
				}

				geometry2.morphAttributes[name] = morphArray;
			}

			geometry2.morphTargetsRelative = this.morphTargetsRelative; // groups

			const groups = this.groups;

			for (let i = 0, l = groups.length; i < l; i++) {
				const group = groups[i];
				geometry2.addGroup(group.start, group.count, group.materialIndex);
			}

			return geometry2;
		}

		toJSON() {
			const data = {
				metadata: {
					version: 4.5,
					type: 'BufferGeometry',
					generator: 'BufferGeometry.toJSON'
				}
			}; // standard BufferGeometry serialization

			data.uuid = this.uuid;
			data.type = this.type;
			if (this.name !== '') data.name = this.name;
			if (Object.keys(this.userData).length > 0) data.userData = this.userData;

			if (this.parameters !== undefined) {
				const parameters = this.parameters;

				for (const key in parameters) {
					if (parameters[key] !== undefined) data[key] = parameters[key];
				}

				return data;
			} // for simplicity the code assumes attributes are not shared across geometries, see #15811


			data.data = {
				attributes: {}
			};
			const index = this.index;

			if (index !== null) {
				data.data.index = {
					type: index.array.constructor.name,
					array: Array.prototype.slice.call(index.array)
				};
			}

			const attributes = this.attributes;

			for (const key in attributes) {
				const attribute = attributes[key];
				data.data.attributes[key] = attribute.toJSON(data.data);
			}

			const morphAttributes = {};
			let hasMorphAttributes = false;

			for (const key in this.morphAttributes) {
				const attributeArray = this.morphAttributes[key];
				const array = [];

				for (let i = 0, il = attributeArray.length; i < il; i++) {
					const attribute = attributeArray[i];
					array.push(attribute.toJSON(data.data));
				}

				if (array.length > 0) {
					morphAttributes[key] = array;
					hasMorphAttributes = true;
				}
			}

			if (hasMorphAttributes) {
				data.data.morphAttributes = morphAttributes;
				data.data.morphTargetsRelative = this.morphTargetsRelative;
			}

			const groups = this.groups;

			if (groups.length > 0) {
				data.data.groups = JSON.parse(JSON.stringify(groups));
			}

			const boundingSphere = this.boundingSphere;

			if (boundingSphere !== null) {
				data.data.boundingSphere = {
					center: boundingSphere.center.toArray(),
					radius: boundingSphere.radius
				};
			}

			return data;
		}

		clone() {
			return new this.constructor().copy(this);
		}

		copy(source) {
			// reset
			this.index = null;
			this.attributes = {};
			this.morphAttributes = {};
			this.groups = [];
			this.boundingBox = null;
			this.boundingSphere = null; // used for storing cloned, shared data

			const data = {}; // name

			this.name = source.name; // index

			const index = source.index;

			if (index !== null) {
				this.setIndex(index.clone(data));
			} // attributes


			const attributes = source.attributes;

			for (const name in attributes) {
				const attribute = attributes[name];
				this.setAttribute(name, attribute.clone(data));
			} // morph attributes


			const morphAttributes = source.morphAttributes;

			for (const name in morphAttributes) {
				const array = [];
				const morphAttribute = morphAttributes[name]; // morphAttribute: array of Float32BufferAttributes

				for (let i = 0, l = morphAttribute.length; i < l; i++) {
					array.push(morphAttribute[i].clone(data));
				}

				this.morphAttributes[name] = array;
			}

			this.morphTargetsRelative = source.morphTargetsRelative; // groups

			const groups = source.groups;

			for (let i = 0, l = groups.length; i < l; i++) {
				const group = groups[i];
				this.addGroup(group.start, group.count, group.materialIndex);
			} // bounding box


			const boundingBox = source.boundingBox;

			if (boundingBox !== null) {
				this.boundingBox = boundingBox.clone();
			} // bounding sphere


			const boundingSphere = source.boundingSphere;

			if (boundingSphere !== null) {
				this.boundingSphere = boundingSphere.clone();
			} // draw range


			this.drawRange.start = source.drawRange.start;
			this.drawRange.count = source.drawRange.count; // user data

			this.userData = source.userData; // geometry generator parameters

			if (source.parameters !== undefined) this.parameters = Object.assign({}, source.parameters);
			return this;
		}

		dispose() {
			this.dispatchEvent({
				type: 'dispose'
			});
		}

	}

	const _inverseMatrix$2 = /*@__PURE__*/new Matrix4();

	const _ray$2 = /*@__PURE__*/new Ray();

	const _sphere$3 = /*@__PURE__*/new Sphere();

	const _vA$1 = /*@__PURE__*/new Vector3();

	const _vB$1 = /*@__PURE__*/new Vector3();

	const _vC$1 = /*@__PURE__*/new Vector3();

	const _tempA = /*@__PURE__*/new Vector3();

	const _tempB = /*@__PURE__*/new Vector3();

	const _tempC = /*@__PURE__*/new Vector3();

	const _morphA = /*@__PURE__*/new Vector3();

	const _morphB = /*@__PURE__*/new Vector3();

	const _morphC = /*@__PURE__*/new Vector3();

	const _uvA$1 = /*@__PURE__*/new Vector2();

	const _uvB$1 = /*@__PURE__*/new Vector2();

	const _uvC$1 = /*@__PURE__*/new Vector2();

	const _intersectionPoint = /*@__PURE__*/new Vector3();

	const _intersectionPointWorld = /*@__PURE__*/new Vector3();

	class Mesh extends Object3D {
		constructor(geometry = new BufferGeometry(), material = new MeshBasicMaterial()) {
			super();
			this.isMesh = true;
			this.type = 'Mesh';
			this.geometry = geometry;
			this.material = material;
			this.updateMorphTargets();
		}

		copy(source, recursive) {
			super.copy(source, recursive);

			if (source.morphTargetInfluences !== undefined) {
				this.morphTargetInfluences = source.morphTargetInfluences.slice();
			}

			if (source.morphTargetDictionary !== undefined) {
				this.morphTargetDictionary = Object.assign({}, source.morphTargetDictionary);
			}

			this.material = source.material;
			this.geometry = source.geometry;
			return this;
		}

		updateMorphTargets() {
			const geometry = this.geometry;
			const morphAttributes = geometry.morphAttributes;
			const keys = Object.keys(morphAttributes);

			if (keys.length > 0) {
				const morphAttribute = morphAttributes[keys[0]];

				if (morphAttribute !== undefined) {
					this.morphTargetInfluences = [];
					this.morphTargetDictionary = {};

					for (let m = 0, ml = morphAttribute.length; m < ml; m++) {
						const name = morphAttribute[m].name || String(m);
						this.morphTargetInfluences.push(0);
						this.morphTargetDictionary[name] = m;
					}
				}
			}
		}

		raycast(raycaster, intersects) {
			const geometry = this.geometry;
			const material = this.material;
			const matrixWorld = this.matrixWorld;
			if (material === undefined) return; // Checking boundingSphere distance to ray

			if (geometry.boundingSphere === null) geometry.computeBoundingSphere();

			_sphere$3.copy(geometry.boundingSphere);

			_sphere$3.applyMatrix4(matrixWorld);

			if (raycaster.ray.intersectsSphere(_sphere$3) === false) return; //

			_inverseMatrix$2.copy(matrixWorld).invert();

			_ray$2.copy(raycaster.ray).applyMatrix4(_inverseMatrix$2); // Check boundingBox before continuing


			if (geometry.boundingBox !== null) {
				if (_ray$2.intersectsBox(geometry.boundingBox) === false) return;
			}

			let intersection;
			const index = geometry.index;
			const position = geometry.attributes.position;
			const morphPosition = geometry.morphAttributes.position;
			const morphTargetsRelative = geometry.morphTargetsRelative;
			const uv = geometry.attributes.uv;
			const uv2 = geometry.attributes.uv2;
			const groups = geometry.groups;
			const drawRange = geometry.drawRange;

			if (index !== null) {
				// indexed buffer geometry
				if (Array.isArray(material)) {
					for (let i = 0, il = groups.length; i < il; i++) {
						const group = groups[i];
						const groupMaterial = material[group.materialIndex];
						const start = Math.max(group.start, drawRange.start);
						const end = Math.min(index.count, Math.min(group.start + group.count, drawRange.start + drawRange.count));

						for (let j = start, jl = end; j < jl; j += 3) {
							const a = index.getX(j);
							const b = index.getX(j + 1);
							const c = index.getX(j + 2);
							intersection = checkBufferGeometryIntersection(this, groupMaterial, raycaster, _ray$2, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c);

							if (intersection) {
								intersection.faceIndex = Math.floor(j / 3); // triangle number in indexed buffer semantics

								intersection.face.materialIndex = group.materialIndex;
								intersects.push(intersection);
							}
						}
					}
				} else {
					const start = Math.max(0, drawRange.start);
					const end = Math.min(index.count, drawRange.start + drawRange.count);

					for (let i = start, il = end; i < il; i += 3) {
						const a = index.getX(i);
						const b = index.getX(i + 1);
						const c = index.getX(i + 2);
						intersection = checkBufferGeometryIntersection(this, material, raycaster, _ray$2, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c);

						if (intersection) {
							intersection.faceIndex = Math.floor(i / 3); // triangle number in indexed buffer semantics

							intersects.push(intersection);
						}
					}
				}
			} else if (position !== undefined) {
				// non-indexed buffer geometry
				if (Array.isArray(material)) {
					for (let i = 0, il = groups.length; i < il; i++) {
						const group = groups[i];
						const groupMaterial = material[group.materialIndex];
						const start = Math.max(group.start, drawRange.start);
						const end = Math.min(position.count, Math.min(group.start + group.count, drawRange.start + drawRange.count));

						for (let j = start, jl = end; j < jl; j += 3) {
							const a = j;
							const b = j + 1;
							const c = j + 2;
							intersection = checkBufferGeometryIntersection(this, groupMaterial, raycaster, _ray$2, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c);

							if (intersection) {
								intersection.faceIndex = Math.floor(j / 3); // triangle number in non-indexed buffer semantics

								intersection.face.materialIndex = group.materialIndex;
								intersects.push(intersection);
							}
						}
					}
				} else {
					const start = Math.max(0, drawRange.start);
					const end = Math.min(position.count, drawRange.start + drawRange.count);

					for (let i = start, il = end; i < il; i += 3) {
						const a = i;
						const b = i + 1;
						const c = i + 2;
						intersection = checkBufferGeometryIntersection(this, material, raycaster, _ray$2, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c);

						if (intersection) {
							intersection.faceIndex = Math.floor(i / 3); // triangle number in non-indexed buffer semantics

							intersects.push(intersection);
						}
					}
				}
			}
		}

	}

	function checkIntersection(object, material, raycaster, ray, pA, pB, pC, point) {
		let intersect;

		if (material.side === BackSide) {
			intersect = ray.intersectTriangle(pC, pB, pA, true, point);
		} else {
			intersect = ray.intersectTriangle(pA, pB, pC, material.side !== DoubleSide, point);
		}

		if (intersect === null) return null;

		_intersectionPointWorld.copy(point);

		_intersectionPointWorld.applyMatrix4(object.matrixWorld);

		const distance = raycaster.ray.origin.distanceTo(_intersectionPointWorld);
		if (distance < raycaster.near || distance > raycaster.far) return null;
		return {
			distance: distance,
			point: _intersectionPointWorld.clone(),
			object: object
		};
	}

	function checkBufferGeometryIntersection(object, material, raycaster, ray, position, morphPosition, morphTargetsRelative, uv, uv2, a, b, c) {
		_vA$1.fromBufferAttribute(position, a);

		_vB$1.fromBufferAttribute(position, b);

		_vC$1.fromBufferAttribute(position, c);

		const morphInfluences = object.morphTargetInfluences;

		if (morphPosition && morphInfluences) {
			_morphA.set(0, 0, 0);

			_morphB.set(0, 0, 0);

			_morphC.set(0, 0, 0);

			for (let i = 0, il = morphPosition.length; i < il; i++) {
				const influence = morphInfluences[i];
				const morphAttribute = morphPosition[i];
				if (influence === 0) continue;

				_tempA.fromBufferAttribute(morphAttribute, a);

				_tempB.fromBufferAttribute(morphAttribute, b);

				_tempC.fromBufferAttribute(morphAttribute, c);

				if (morphTargetsRelative) {
					_morphA.addScaledVector(_tempA, influence);

					_morphB.addScaledVector(_tempB, influence);

					_morphC.addScaledVector(_tempC, influence);
				} else {
					_morphA.addScaledVector(_tempA.sub(_vA$1), influence);

					_morphB.addScaledVector(_tempB.sub(_vB$1), influence);

					_morphC.addScaledVector(_tempC.sub(_vC$1), influence);
				}
			}

			_vA$1.add(_morphA);

			_vB$1.add(_morphB);

			_vC$1.add(_morphC);
		}

		if (object.isSkinnedMesh) {
			object.boneTransform(a, _vA$1);
			object.boneTransform(b, _vB$1);
			object.boneTransform(c, _vC$1);
		}

		const intersection = checkIntersection(object, material, raycaster, ray, _vA$1, _vB$1, _vC$1, _intersectionPoint);

		if (intersection) {
			if (uv) {
				_uvA$1.fromBufferAttribute(uv, a);

				_uvB$1.fromBufferAttribute(uv, b);

				_uvC$1.fromBufferAttribute(uv, c);

				intersection.uv = Triangle.getUV(_intersectionPoint, _vA$1, _vB$1, _vC$1, _uvA$1, _uvB$1, _uvC$1, new Vector2());
			}

			if (uv2) {
				_uvA$1.fromBufferAttribute(uv2, a);

				_uvB$1.fromBufferAttribute(uv2, b);

				_uvC$1.fromBufferAttribute(uv2, c);

				intersection.uv2 = Triangle.getUV(_intersectionPoint, _vA$1, _vB$1, _vC$1, _uvA$1, _uvB$1, _uvC$1, new Vector2());
			}

			const face = {
				a: a,
				b: b,
				c: c,
				normal: new Vector3(),
				materialIndex: 0
			};
			Triangle.getNormal(_vA$1, _vB$1, _vC$1, face.normal);
			intersection.face = face;
		}

		return intersection;
	}

	class BoxGeometry extends BufferGeometry {
		constructor(width = 1, height = 1, depth = 1, widthSegments = 1, heightSegments = 1, depthSegments = 1) {
			super();
			this.type = 'BoxGeometry';
			this.parameters = {
				width: width,
				height: height,
				depth: depth,
				widthSegments: widthSegments,
				heightSegments: heightSegments,
				depthSegments: depthSegments
			};
			const scope = this; // segments

			widthSegments = Math.floor(widthSegments);
			heightSegments = Math.floor(heightSegments);
			depthSegments = Math.floor(depthSegments); // buffers

			const indices = [];
			const vertices = [];
			const normals = [];
			const uvs = []; // helper variables

			let numberOfVertices = 0;
			let groupStart = 0; // build each side of the box geometry

			buildPlane('z', 'y', 'x', -1, -1, depth, height, width, depthSegments, heightSegments, 0); // px

			buildPlane('z', 'y', 'x', 1, -1, depth, height, -width, depthSegments, heightSegments, 1); // nx

			buildPlane('x', 'z', 'y', 1, 1, width, depth, height, widthSegments, depthSegments, 2); // py

			buildPlane('x', 'z', 'y', 1, -1, width, depth, -height, widthSegments, depthSegments, 3); // ny

			buildPlane('x', 'y', 'z', 1, -1, width, height, depth, widthSegments, heightSegments, 4); // pz

			buildPlane('x', 'y', 'z', -1, -1, width, height, -depth, widthSegments, heightSegments, 5); // nz
			// build geometry

			this.setIndex(indices);
			this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));

			function buildPlane(u, v, w, udir, vdir, width, height, depth, gridX, gridY, materialIndex) {
				const segmentWidth = width / gridX;
				const segmentHeight = height / gridY;
				const widthHalf = width / 2;
				const heightHalf = height / 2;
				const depthHalf = depth / 2;
				const gridX1 = gridX + 1;
				const gridY1 = gridY + 1;
				let vertexCounter = 0;
				let groupCount = 0;
				const vector = new Vector3(); // generate vertices, normals and uvs

				for (let iy = 0; iy < gridY1; iy++) {
					const y = iy * segmentHeight - heightHalf;

					for (let ix = 0; ix < gridX1; ix++) {
						const x = ix * segmentWidth - widthHalf; // set values to correct vector component

						vector[u] = x * udir;
						vector[v] = y * vdir;
						vector[w] = depthHalf; // now apply vector to vertex buffer

						vertices.push(vector.x, vector.y, vector.z); // set values to correct vector component

						vector[u] = 0;
						vector[v] = 0;
						vector[w] = depth > 0 ? 1 : -1; // now apply vector to normal buffer

						normals.push(vector.x, vector.y, vector.z); // uvs

						uvs.push(ix / gridX);
						uvs.push(1 - iy / gridY); // counters

						vertexCounter += 1;
					}
				} // indices
				// 1. you need three indices to draw a single face
				// 2. a single segment consists of two faces
				// 3. so we need to generate six (2*3) indices per segment


				for (let iy = 0; iy < gridY; iy++) {
					for (let ix = 0; ix < gridX; ix++) {
						const a = numberOfVertices + ix + gridX1 * iy;
						const b = numberOfVertices + ix + gridX1 * (iy + 1);
						const c = numberOfVertices + (ix + 1) + gridX1 * (iy + 1);
						const d = numberOfVertices + (ix + 1) + gridX1 * iy; // faces

						indices.push(a, b, d);
						indices.push(b, c, d); // increase counter

						groupCount += 6;
					}
				} // add a group to the geometry. this will ensure multi material support


				scope.addGroup(groupStart, groupCount, materialIndex); // calculate new start value for groups

				groupStart += groupCount; // update total number of vertices

				numberOfVertices += vertexCounter;
			}
		}

		static fromJSON(data) {
			return new BoxGeometry(data.width, data.height, data.depth, data.widthSegments, data.heightSegments, data.depthSegments);
		}

	}

	/**
	 * Uniform Utilities
	 */
	function cloneUniforms(src) {
		const dst = {};

		for (const u in src) {
			dst[u] = {};

			for (const p in src[u]) {
				const property = src[u][p];

				if (property && (property.isColor || property.isMatrix3 || property.isMatrix4 || property.isVector2 || property.isVector3 || property.isVector4 || property.isTexture || property.isQuaternion)) {
					dst[u][p] = property.clone();
				} else if (Array.isArray(property)) {
					dst[u][p] = property.slice();
				} else {
					dst[u][p] = property;
				}
			}
		}

		return dst;
	}
	function mergeUniforms(uniforms) {
		const merged = {};

		for (let u = 0; u < uniforms.length; u++) {
			const tmp = cloneUniforms(uniforms[u]);

			for (const p in tmp) {
				merged[p] = tmp[p];
			}
		}

		return merged;
	}
	function cloneUniformsGroups(src) {
		const dst = [];

		for (let u = 0; u < src.length; u++) {
			dst.push(src[u].clone());
		}

		return dst;
	} // Legacy

	const UniformsUtils = {
		clone: cloneUniforms,
		merge: mergeUniforms
	};

	var default_vertex = "void main() {\n\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n}";

	var default_fragment = "void main() {\n\tgl_FragColor = vec4( 1.0, 0.0, 0.0, 1.0 );\n}";

	class ShaderMaterial extends Material {
		constructor(parameters) {
			super();
			this.isShaderMaterial = true;
			this.type = 'ShaderMaterial';
			this.defines = {};
			this.uniforms = {};
			this.uniformsGroups = [];
			this.vertexShader = default_vertex;
			this.fragmentShader = default_fragment;
			this.linewidth = 1;
			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.fog = false; // set to use scene fog

			this.lights = false; // set to use scene lights

			this.clipping = false; // set to use user-defined clipping planes

			this.extensions = {
				derivatives: false,
				// set to use derivatives
				fragDepth: false,
				// set to use fragment depth values
				drawBuffers: false,
				// set to use draw buffers
				shaderTextureLOD: false // set to use shader texture LOD

			}; // When rendered geometry doesn't include these attributes but the material does,
			// use these default values in WebGL. This avoids errors when buffer data is missing.

			this.defaultAttributeValues = {
				'color': [1, 1, 1],
				'uv': [0, 0],
				'uv2': [0, 0]
			};
			this.index0AttributeName = undefined;
			this.uniformsNeedUpdate = false;
			this.glslVersion = null;

			if (parameters !== undefined) {
				if (parameters.attributes !== undefined) {
					console.error('THREE.ShaderMaterial: attributes should now be defined in THREE.BufferGeometry instead.');
				}

				this.setValues(parameters);
			}
		}

		copy(source) {
			super.copy(source);
			this.fragmentShader = source.fragmentShader;
			this.vertexShader = source.vertexShader;
			this.uniforms = cloneUniforms(source.uniforms);
			this.uniformsGroups = cloneUniformsGroups(source.uniformsGroups);
			this.defines = Object.assign({}, source.defines);
			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.fog = source.fog;
			this.lights = source.lights;
			this.clipping = source.clipping;
			this.extensions = Object.assign({}, source.extensions);
			this.glslVersion = source.glslVersion;
			return this;
		}

		toJSON(meta) {
			const data = super.toJSON(meta);
			data.glslVersion = this.glslVersion;
			data.uniforms = {};

			for (const name in this.uniforms) {
				const uniform = this.uniforms[name];
				const value = uniform.value;

				if (value && value.isTexture) {
					data.uniforms[name] = {
						type: 't',
						value: value.toJSON(meta).uuid
					};
				} else if (value && value.isColor) {
					data.uniforms[name] = {
						type: 'c',
						value: value.getHex()
					};
				} else if (value && value.isVector2) {
					data.uniforms[name] = {
						type: 'v2',
						value: value.toArray()
					};
				} else if (value && value.isVector3) {
					data.uniforms[name] = {
						type: 'v3',
						value: value.toArray()
					};
				} else if (value && value.isVector4) {
					data.uniforms[name] = {
						type: 'v4',
						value: value.toArray()
					};
				} else if (value && value.isMatrix3) {
					data.uniforms[name] = {
						type: 'm3',
						value: value.toArray()
					};
				} else if (value && value.isMatrix4) {
					data.uniforms[name] = {
						type: 'm4',
						value: value.toArray()
					};
				} else {
					data.uniforms[name] = {
						value: value
					}; // note: the array variants v2v, v3v, v4v, m4v and tv are not supported so far
				}
			}

			if (Object.keys(this.defines).length > 0) data.defines = this.defines;
			data.vertexShader = this.vertexShader;
			data.fragmentShader = this.fragmentShader;
			const extensions = {};

			for (const key in this.extensions) {
				if (this.extensions[key] === true) extensions[key] = true;
			}

			if (Object.keys(extensions).length > 0) data.extensions = extensions;
			return data;
		}

	}

	class Camera extends Object3D {
		constructor() {
			super();
			this.isCamera = true;
			this.type = 'Camera';
			this.matrixWorldInverse = new Matrix4();
			this.projectionMatrix = new Matrix4();
			this.projectionMatrixInverse = new Matrix4();
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.matrixWorldInverse.copy(source.matrixWorldInverse);
			this.projectionMatrix.copy(source.projectionMatrix);
			this.projectionMatrixInverse.copy(source.projectionMatrixInverse);
			return this;
		}

		getWorldDirection(target) {
			this.updateWorldMatrix(true, false);
			const e = this.matrixWorld.elements;
			return target.set(-e[8], -e[9], -e[10]).normalize();
		}

		updateMatrixWorld(force) {
			super.updateMatrixWorld(force);
			this.matrixWorldInverse.copy(this.matrixWorld).invert();
		}

		updateWorldMatrix(updateParents, updateChildren) {
			super.updateWorldMatrix(updateParents, updateChildren);
			this.matrixWorldInverse.copy(this.matrixWorld).invert();
		}

		clone() {
			return new this.constructor().copy(this);
		}

	}

	class PerspectiveCamera extends Camera {
		constructor(fov = 50, aspect = 1, near = 0.1, far = 2000) {
			super();
			this.isPerspectiveCamera = true;
			this.type = 'PerspectiveCamera';
			this.fov = fov;
			this.zoom = 1;
			this.near = near;
			this.far = far;
			this.focus = 10;
			this.aspect = aspect;
			this.view = null;
			this.filmGauge = 35; // width of the film (default in millimeters)

			this.filmOffset = 0; // horizontal film offset (same unit as gauge)

			this.updateProjectionMatrix();
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.fov = source.fov;
			this.zoom = source.zoom;
			this.near = source.near;
			this.far = source.far;
			this.focus = source.focus;
			this.aspect = source.aspect;
			this.view = source.view === null ? null : Object.assign({}, source.view);
			this.filmGauge = source.filmGauge;
			this.filmOffset = source.filmOffset;
			return this;
		}
		/**
		 * Sets the FOV by focal length in respect to the current .filmGauge.
		 *
		 * The default film gauge is 35, so that the focal length can be specified for
		 * a 35mm (full frame) camera.
		 *
		 * Values for focal length and film gauge must have the same unit.
		 */


		setFocalLength(focalLength) {
			/** see {@link http://www.bobatkins.com/photography/technical/field_of_view.html} */
			const vExtentSlope = 0.5 * this.getFilmHeight() / focalLength;
			this.fov = RAD2DEG * 2 * Math.atan(vExtentSlope);
			this.updateProjectionMatrix();
		}
		/**
		 * Calculates the focal length from the current .fov and .filmGauge.
		 */


		getFocalLength() {
			const vExtentSlope = Math.tan(DEG2RAD * 0.5 * this.fov);
			return 0.5 * this.getFilmHeight() / vExtentSlope;
		}

		getEffectiveFOV() {
			return RAD2DEG * 2 * Math.atan(Math.tan(DEG2RAD * 0.5 * this.fov) / this.zoom);
		}

		getFilmWidth() {
			// film not completely covered in portrait format (aspect < 1)
			return this.filmGauge * Math.min(this.aspect, 1);
		}

		getFilmHeight() {
			// film not completely covered in landscape format (aspect > 1)
			return this.filmGauge / Math.max(this.aspect, 1);
		}
		/**
		 * Sets an offset in a larger frustum. This is useful for multi-window or
		 * multi-monitor/multi-machine setups.
		 *
		 * For example, if you have 3x2 monitors and each monitor is 1920x1080 and
		 * the monitors are in grid like this
		 *
		 *	 +---+---+---+
		 *	 | A | B | C |
		 *	 +---+---+---+
		 *	 | D | E | F |
		 *	 +---+---+---+
		 *
		 * then for each monitor you would call it like this
		 *
		 *	 const w = 1920;
		 *	 const h = 1080;
		 *	 const fullWidth = w * 3;
		 *	 const fullHeight = h * 2;
		 *
		 *	 --A--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );
		 *	 --B--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );
		 *	 --C--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );
		 *	 --D--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );
		 *	 --E--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );
		 *	 --F--
		 *	 camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );
		 *
		 *	 Note there is no reason monitors have to be the same size or in a grid.
		 */


		setViewOffset(fullWidth, fullHeight, x, y, width, height) {
			this.aspect = fullWidth / fullHeight;

			if (this.view === null) {
				this.view = {
					enabled: true,
					fullWidth: 1,
					fullHeight: 1,
					offsetX: 0,
					offsetY: 0,
					width: 1,
					height: 1
				};
			}

			this.view.enabled = true;
			this.view.fullWidth = fullWidth;
			this.view.fullHeight = fullHeight;
			this.view.offsetX = x;
			this.view.offsetY = y;
			this.view.width = width;
			this.view.height = height;
			this.updateProjectionMatrix();
		}

		clearViewOffset() {
			if (this.view !== null) {
				this.view.enabled = false;
			}

			this.updateProjectionMatrix();
		}

		updateProjectionMatrix() {
			const near = this.near;
			let top = near * Math.tan(DEG2RAD * 0.5 * this.fov) / this.zoom;
			let height = 2 * top;
			let width = this.aspect * height;
			let left = -0.5 * width;
			const view = this.view;

			if (this.view !== null && this.view.enabled) {
				const fullWidth = view.fullWidth,
							fullHeight = view.fullHeight;
				left += view.offsetX * width / fullWidth;
				top -= view.offsetY * height / fullHeight;
				width *= view.width / fullWidth;
				height *= view.height / fullHeight;
			}

			const skew = this.filmOffset;
			if (skew !== 0) left += near * skew / this.getFilmWidth();
			this.projectionMatrix.makePerspective(left, left + width, top, top - height, near, this.far);
			this.projectionMatrixInverse.copy(this.projectionMatrix).invert();
		}

		toJSON(meta) {
			const data = super.toJSON(meta);
			data.object.fov = this.fov;
			data.object.zoom = this.zoom;
			data.object.near = this.near;
			data.object.far = this.far;
			data.object.focus = this.focus;
			data.object.aspect = this.aspect;
			if (this.view !== null) data.object.view = Object.assign({}, this.view);
			data.object.filmGauge = this.filmGauge;
			data.object.filmOffset = this.filmOffset;
			return data;
		}

	}

	const fov = 90,
				aspect = 1;

	class CubeCamera extends Object3D {
		constructor(near, far, renderTarget) {
			super();
			this.type = 'CubeCamera';

			if (renderTarget.isWebGLCubeRenderTarget !== true) {
				console.error('THREE.CubeCamera: The constructor now expects an instance of WebGLCubeRenderTarget as third parameter.');
				return;
			}

			this.renderTarget = renderTarget;
			const cameraPX = new PerspectiveCamera(fov, aspect, near, far);
			cameraPX.layers = this.layers;
			cameraPX.up.set(0, -1, 0);
			cameraPX.lookAt(new Vector3(1, 0, 0));
			this.add(cameraPX);
			const cameraNX = new PerspectiveCamera(fov, aspect, near, far);
			cameraNX.layers = this.layers;
			cameraNX.up.set(0, -1, 0);
			cameraNX.lookAt(new Vector3(-1, 0, 0));
			this.add(cameraNX);
			const cameraPY = new PerspectiveCamera(fov, aspect, near, far);
			cameraPY.layers = this.layers;
			cameraPY.up.set(0, 0, 1);
			cameraPY.lookAt(new Vector3(0, 1, 0));
			this.add(cameraPY);
			const cameraNY = new PerspectiveCamera(fov, aspect, near, far);
			cameraNY.layers = this.layers;
			cameraNY.up.set(0, 0, -1);
			cameraNY.lookAt(new Vector3(0, -1, 0));
			this.add(cameraNY);
			const cameraPZ = new PerspectiveCamera(fov, aspect, near, far);
			cameraPZ.layers = this.layers;
			cameraPZ.up.set(0, -1, 0);
			cameraPZ.lookAt(new Vector3(0, 0, 1));
			this.add(cameraPZ);
			const cameraNZ = new PerspectiveCamera(fov, aspect, near, far);
			cameraNZ.layers = this.layers;
			cameraNZ.up.set(0, -1, 0);
			cameraNZ.lookAt(new Vector3(0, 0, -1));
			this.add(cameraNZ);
		}

		update(renderer, scene) {
			if (this.parent === null) this.updateMatrixWorld();
			const renderTarget = this.renderTarget;
			const [cameraPX, cameraNX, cameraPY, cameraNY, cameraPZ, cameraNZ] = this.children;
			const currentRenderTarget = renderer.getRenderTarget();
			const currentToneMapping = renderer.toneMapping;
			const currentXrEnabled = renderer.xr.enabled;
			renderer.toneMapping = NoToneMapping;
			renderer.xr.enabled = false;
			const generateMipmaps = renderTarget.texture.generateMipmaps;
			renderTarget.texture.generateMipmaps = false;
			renderer.setRenderTarget(renderTarget, 0);
			renderer.render(scene, cameraPX);
			renderer.setRenderTarget(renderTarget, 1);
			renderer.render(scene, cameraNX);
			renderer.setRenderTarget(renderTarget, 2);
			renderer.render(scene, cameraPY);
			renderer.setRenderTarget(renderTarget, 3);
			renderer.render(scene, cameraNY);
			renderer.setRenderTarget(renderTarget, 4);
			renderer.render(scene, cameraPZ);
			renderTarget.texture.generateMipmaps = generateMipmaps;
			renderer.setRenderTarget(renderTarget, 5);
			renderer.render(scene, cameraNZ);
			renderer.setRenderTarget(currentRenderTarget);
			renderer.toneMapping = currentToneMapping;
			renderer.xr.enabled = currentXrEnabled;
			renderTarget.texture.needsPMREMUpdate = true;
		}

	}

	class CubeTexture extends Texture {
		constructor(images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding) {
			images = images !== undefined ? images : [];
			mapping = mapping !== undefined ? mapping : CubeReflectionMapping;
			super(images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding);
			this.isCubeTexture = true;
			this.flipY = false;
		}

		get images() {
			return this.image;
		}

		set images(value) {
			this.image = value;
		}

	}

	class WebGLCubeRenderTarget extends WebGLRenderTarget {
		constructor(size, options = {}) {
			super(size, size, options);
			this.isWebGLCubeRenderTarget = true;
			const image = {
				width: size,
				height: size,
				depth: 1
			};
			const images = [image, image, image, image, image, image];
			this.texture = new CubeTexture(images, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding); // By convention -- likely based on the RenderMan spec from the 1990's -- cube maps are specified by WebGL (and three.js)
			// in a coordinate system in which positive-x is to the right when looking up the positive-z axis -- in other words,
			// in a left-handed coordinate system. By continuing this convention, preexisting cube maps continued to render correctly.
			// three.js uses a right-handed coordinate system. So environment maps used in three.js appear to have px and nx swapped
			// and the flag isRenderTargetTexture controls this conversion. The flip is not required when using WebGLCubeRenderTarget.texture
			// as a cube texture (this is detected when isRenderTargetTexture is set to true for cube textures).

			this.texture.isRenderTargetTexture = true;
			this.texture.generateMipmaps = options.generateMipmaps !== undefined ? options.generateMipmaps : false;
			this.texture.minFilter = options.minFilter !== undefined ? options.minFilter : LinearFilter;
		}

		fromEquirectangularTexture(renderer, texture) {
			this.texture.type = texture.type;
			this.texture.encoding = texture.encoding;
			this.texture.generateMipmaps = texture.generateMipmaps;
			this.texture.minFilter = texture.minFilter;
			this.texture.magFilter = texture.magFilter;
			const shader = {
				uniforms: {
					tEquirect: {
						value: null
					}
				},
				vertexShader:
				/* glsl */
				`

				varying vec3 vWorldDirection;

				vec3 transformDirection( in vec3 dir, in mat4 matrix ) {

					return normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );

				}

				void main() {

					vWorldDirection = transformDirection( position, modelMatrix );

					#include <begin_vertex>
					#include <project_vertex>

				}
			`,
				fragmentShader:
				/* glsl */
				`

				uniform sampler2D tEquirect;

				varying vec3 vWorldDirection;

				#include <common>

				void main() {

					vec3 direction = normalize( vWorldDirection );

					vec2 sampleUV = equirectUv( direction );

					gl_FragColor = texture2D( tEquirect, sampleUV );

				}
			`
			};
			const geometry = new BoxGeometry(5, 5, 5);
			const material = new ShaderMaterial({
				name: 'CubemapFromEquirect',
				uniforms: cloneUniforms(shader.uniforms),
				vertexShader: shader.vertexShader,
				fragmentShader: shader.fragmentShader,
				side: BackSide,
				blending: NoBlending
			});
			material.uniforms.tEquirect.value = texture;
			const mesh = new Mesh(geometry, material);
			const currentMinFilter = texture.minFilter; // Avoid blurred poles

			if (texture.minFilter === LinearMipmapLinearFilter) texture.minFilter = LinearFilter;
			const camera = new CubeCamera(1, 10, this);
			camera.update(renderer, mesh);
			texture.minFilter = currentMinFilter;
			mesh.geometry.dispose();
			mesh.material.dispose();
			return this;
		}

		clear(renderer, color, depth, stencil) {
			const currentRenderTarget = renderer.getRenderTarget();

			for (let i = 0; i < 6; i++) {
				renderer.setRenderTarget(this, i);
				renderer.clear(color, depth, stencil);
			}

			renderer.setRenderTarget(currentRenderTarget);
		}

	}

	const _vector1 = /*@__PURE__*/new Vector3();

	const _vector2 = /*@__PURE__*/new Vector3();

	const _normalMatrix = /*@__PURE__*/new Matrix3();

	class Plane {
		constructor(normal = new Vector3(1, 0, 0), constant = 0) {
			this.isPlane = true; // normal is assumed to be normalized

			this.normal = normal;
			this.constant = constant;
		}

		set(normal, constant) {
			this.normal.copy(normal);
			this.constant = constant;
			return this;
		}

		setComponents(x, y, z, w) {
			this.normal.set(x, y, z);
			this.constant = w;
			return this;
		}

		setFromNormalAndCoplanarPoint(normal, point) {
			this.normal.copy(normal);
			this.constant = -point.dot(this.normal);
			return this;
		}

		setFromCoplanarPoints(a, b, c) {
			const normal = _vector1.subVectors(c, b).cross(_vector2.subVectors(a, b)).normalize(); // Q: should an error be thrown if normal is zero (e.g. degenerate plane)?


			this.setFromNormalAndCoplanarPoint(normal, a);
			return this;
		}

		copy(plane) {
			this.normal.copy(plane.normal);
			this.constant = plane.constant;
			return this;
		}

		normalize() {
			// Note: will lead to a divide by zero if the plane is invalid.
			const inverseNormalLength = 1.0 / this.normal.length();
			this.normal.multiplyScalar(inverseNormalLength);
			this.constant *= inverseNormalLength;
			return this;
		}

		negate() {
			this.constant *= -1;
			this.normal.negate();
			return this;
		}

		distanceToPoint(point) {
			return this.normal.dot(point) + this.constant;
		}

		distanceToSphere(sphere) {
			return this.distanceToPoint(sphere.center) - sphere.radius;
		}

		projectPoint(point, target) {
			return target.copy(this.normal).multiplyScalar(-this.distanceToPoint(point)).add(point);
		}

		intersectLine(line, target) {
			const direction = line.delta(_vector1);
			const denominator = this.normal.dot(direction);

			if (denominator === 0) {
				// line is coplanar, return origin
				if (this.distanceToPoint(line.start) === 0) {
					return target.copy(line.start);
				} // Unsure if this is the correct method to handle this case.


				return null;
			}

			const t = -(line.start.dot(this.normal) + this.constant) / denominator;

			if (t < 0 || t > 1) {
				return null;
			}

			return target.copy(direction).multiplyScalar(t).add(line.start);
		}

		intersectsLine(line) {
			// Note: this tests if a line intersects the plane, not whether it (or its end-points) are coplanar with it.
			const startSign = this.distanceToPoint(line.start);
			const endSign = this.distanceToPoint(line.end);
			return startSign < 0 && endSign > 0 || endSign < 0 && startSign > 0;
		}

		intersectsBox(box) {
			return box.intersectsPlane(this);
		}

		intersectsSphere(sphere) {
			return sphere.intersectsPlane(this);
		}

		coplanarPoint(target) {
			return target.copy(this.normal).multiplyScalar(-this.constant);
		}

		applyMatrix4(matrix, optionalNormalMatrix) {
			const normalMatrix = optionalNormalMatrix || _normalMatrix.getNormalMatrix(matrix);

			const referencePoint = this.coplanarPoint(_vector1).applyMatrix4(matrix);
			const normal = this.normal.applyMatrix3(normalMatrix).normalize();
			this.constant = -referencePoint.dot(normal);
			return this;
		}

		translate(offset) {
			this.constant -= offset.dot(this.normal);
			return this;
		}

		equals(plane) {
			return plane.normal.equals(this.normal) && plane.constant === this.constant;
		}

		clone() {
			return new this.constructor().copy(this);
		}

	}

	const _sphere$2 = /*@__PURE__*/new Sphere();

	const _vector$7 = /*@__PURE__*/new Vector3();

	class Frustum {
		constructor(p0 = new Plane(), p1 = new Plane(), p2 = new Plane(), p3 = new Plane(), p4 = new Plane(), p5 = new Plane()) {
			this.planes = [p0, p1, p2, p3, p4, p5];
		}

		set(p0, p1, p2, p3, p4, p5) {
			const planes = this.planes;
			planes[0].copy(p0);
			planes[1].copy(p1);
			planes[2].copy(p2);
			planes[3].copy(p3);
			planes[4].copy(p4);
			planes[5].copy(p5);
			return this;
		}

		copy(frustum) {
			const planes = this.planes;

			for (let i = 0; i < 6; i++) {
				planes[i].copy(frustum.planes[i]);
			}

			return this;
		}

		setFromProjectionMatrix(m) {
			const planes = this.planes;
			const me = m.elements;
			const me0 = me[0],
						me1 = me[1],
						me2 = me[2],
						me3 = me[3];
			const me4 = me[4],
						me5 = me[5],
						me6 = me[6],
						me7 = me[7];
			const me8 = me[8],
						me9 = me[9],
						me10 = me[10],
						me11 = me[11];
			const me12 = me[12],
						me13 = me[13],
						me14 = me[14],
						me15 = me[15];
			planes[0].setComponents(me3 - me0, me7 - me4, me11 - me8, me15 - me12).normalize();
			planes[1].setComponents(me3 + me0, me7 + me4, me11 + me8, me15 + me12).normalize();
			planes[2].setComponents(me3 + me1, me7 + me5, me11 + me9, me15 + me13).normalize();
			planes[3].setComponents(me3 - me1, me7 - me5, me11 - me9, me15 - me13).normalize();
			planes[4].setComponents(me3 - me2, me7 - me6, me11 - me10, me15 - me14).normalize();
			planes[5].setComponents(me3 + me2, me7 + me6, me11 + me10, me15 + me14).normalize();
			return this;
		}

		intersectsObject(object) {
			const geometry = object.geometry;
			if (geometry.boundingSphere === null) geometry.computeBoundingSphere();

			_sphere$2.copy(geometry.boundingSphere).applyMatrix4(object.matrixWorld);

			return this.intersectsSphere(_sphere$2);
		}

		intersectsSprite(sprite) {
			_sphere$2.center.set(0, 0, 0);

			_sphere$2.radius = 0.7071067811865476;

			_sphere$2.applyMatrix4(sprite.matrixWorld);

			return this.intersectsSphere(_sphere$2);
		}

		intersectsSphere(sphere) {
			const planes = this.planes;
			const center = sphere.center;
			const negRadius = -sphere.radius;

			for (let i = 0; i < 6; i++) {
				const distance = planes[i].distanceToPoint(center);

				if (distance < negRadius) {
					return false;
				}
			}

			return true;
		}

		intersectsBox(box) {
			const planes = this.planes;

			for (let i = 0; i < 6; i++) {
				const plane = planes[i]; // corner at max distance

				_vector$7.x = plane.normal.x > 0 ? box.max.x : box.min.x;
				_vector$7.y = plane.normal.y > 0 ? box.max.y : box.min.y;
				_vector$7.z = plane.normal.z > 0 ? box.max.z : box.min.z;

				if (plane.distanceToPoint(_vector$7) < 0) {
					return false;
				}
			}

			return true;
		}

		containsPoint(point) {
			const planes = this.planes;

			for (let i = 0; i < 6; i++) {
				if (planes[i].distanceToPoint(point) < 0) {
					return false;
				}
			}

			return true;
		}

		clone() {
			return new this.constructor().copy(this);
		}

	}

	function WebGLAnimation() {
		let context = null;
		let isAnimating = false;
		let animationLoop = null;
		let requestId = null;

		function onAnimationFrame(time, frame) {
			animationLoop(time, frame);
			requestId = context.requestAnimationFrame(onAnimationFrame);
		}

		return {
			start: function () {
				if (isAnimating === true) return;
				if (animationLoop === null) return;
				requestId = context.requestAnimationFrame(onAnimationFrame);
				isAnimating = true;
			},
			stop: function () {
				context.cancelAnimationFrame(requestId);
				isAnimating = false;
			},
			setAnimationLoop: function (callback) {
				animationLoop = callback;
			},
			setContext: function (value) {
				context = value;
			}
		};
	}

	function WebGLAttributes(gl, capabilities) {
		const isWebGL2 = capabilities.isWebGL2;
		const buffers = new WeakMap();

		function createBuffer(attribute, bufferType) {
			const array = attribute.array;
			const usage = attribute.usage;
			const buffer = gl.createBuffer();
			gl.bindBuffer(bufferType, buffer);
			gl.bufferData(bufferType, array, usage);
			attribute.onUploadCallback();
			let type;

			if (array instanceof Float32Array) {
				type = gl.FLOAT;
			} else if (array instanceof Uint16Array) {
				if (attribute.isFloat16BufferAttribute) {
					if (isWebGL2) {
						type = gl.HALF_FLOAT;
					} else {
						throw new Error('THREE.WebGLAttributes: Usage of Float16BufferAttribute requires WebGL2.');
					}
				} else {
					type = gl.UNSIGNED_SHORT;
				}
			} else if (array instanceof Int16Array) {
				type = gl.SHORT;
			} else if (array instanceof Uint32Array) {
				type = gl.UNSIGNED_INT;
			} else if (array instanceof Int32Array) {
				type = gl.INT;
			} else if (array instanceof Int8Array) {
				type = gl.BYTE;
			} else if (array instanceof Uint8Array) {
				type = gl.UNSIGNED_BYTE;
			} else if (array instanceof Uint8ClampedArray) {
				type = gl.UNSIGNED_BYTE;
			} else {
				throw new Error('THREE.WebGLAttributes: Unsupported buffer data format: ' + array);
			}

			return {
				buffer: buffer,
				type: type,
				bytesPerElement: array.BYTES_PER_ELEMENT,
				version: attribute.version
			};
		}

		function updateBuffer(buffer, attribute, bufferType) {
			const array = attribute.array;
			const updateRange = attribute.updateRange;
			gl.bindBuffer(bufferType, buffer);

			if (updateRange.count === -1) {
				// Not using update ranges
				gl.bufferSubData(bufferType, 0, array);
			} else {
				if (isWebGL2) {
					gl.bufferSubData(bufferType, updateRange.offset * array.BYTES_PER_ELEMENT, array, updateRange.offset, updateRange.count);
				} else {
					gl.bufferSubData(bufferType, updateRange.offset * array.BYTES_PER_ELEMENT, array.subarray(updateRange.offset, updateRange.offset + updateRange.count));
				}

				updateRange.count = -1; // reset range
			}
		} //


		function get(attribute) {
			if (attribute.isInterleavedBufferAttribute) attribute = attribute.data;
			return buffers.get(attribute);
		}

		function remove(attribute) {
			if (attribute.isInterleavedBufferAttribute) attribute = attribute.data;
			const data = buffers.get(attribute);

			if (data) {
				gl.deleteBuffer(data.buffer);
				buffers.delete(attribute);
			}
		}

		function update(attribute, bufferType) {
			if (attribute.isGLBufferAttribute) {
				const cached = buffers.get(attribute);

				if (!cached || cached.version < attribute.version) {
					buffers.set(attribute, {
						buffer: attribute.buffer,
						type: attribute.type,
						bytesPerElement: attribute.elementSize,
						version: attribute.version
					});
				}

				return;
			}

			if (attribute.isInterleavedBufferAttribute) attribute = attribute.data;
			const data = buffers.get(attribute);

			if (data === undefined) {
				buffers.set(attribute, createBuffer(attribute, bufferType));
			} else if (data.version < attribute.version) {
				updateBuffer(data.buffer, attribute, bufferType);
				data.version = attribute.version;
			}
		}

		return {
			get: get,
			remove: remove,
			update: update
		};
	}

	class PlaneGeometry extends BufferGeometry {
		constructor(width = 1, height = 1, widthSegments = 1, heightSegments = 1) {
			super();
			this.type = 'PlaneGeometry';
			this.parameters = {
				width: width,
				height: height,
				widthSegments: widthSegments,
				heightSegments: heightSegments
			};
			const width_half = width / 2;
			const height_half = height / 2;
			const gridX = Math.floor(widthSegments);
			const gridY = Math.floor(heightSegments);
			const gridX1 = gridX + 1;
			const gridY1 = gridY + 1;
			const segment_width = width / gridX;
			const segment_height = height / gridY; //

			const indices = [];
			const vertices = [];
			const normals = [];
			const uvs = [];

			for (let iy = 0; iy < gridY1; iy++) {
				const y = iy * segment_height - height_half;

				for (let ix = 0; ix < gridX1; ix++) {
					const x = ix * segment_width - width_half;
					vertices.push(x, -y, 0);
					normals.push(0, 0, 1);
					uvs.push(ix / gridX);
					uvs.push(1 - iy / gridY);
				}
			}

			for (let iy = 0; iy < gridY; iy++) {
				for (let ix = 0; ix < gridX; ix++) {
					const a = ix + gridX1 * iy;
					const b = ix + gridX1 * (iy + 1);
					const c = ix + 1 + gridX1 * (iy + 1);
					const d = ix + 1 + gridX1 * iy;
					indices.push(a, b, d);
					indices.push(b, c, d);
				}
			}

			this.setIndex(indices);
			this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));
		}

		static fromJSON(data) {
			return new PlaneGeometry(data.width, data.height, data.widthSegments, data.heightSegments);
		}

	}

	var alphamap_fragment = "#ifdef USE_ALPHAMAP\n\tdiffuseColor.a *= texture2D( alphaMap, vUv ).g;\n#endif";

	var alphamap_pars_fragment = "#ifdef USE_ALPHAMAP\n\tuniform sampler2D alphaMap;\n#endif";

	var alphatest_fragment = "#ifdef USE_ALPHATEST\n\tif ( diffuseColor.a < alphaTest ) discard;\n#endif";

	var alphatest_pars_fragment = "#ifdef USE_ALPHATEST\n\tuniform float alphaTest;\n#endif";

	var aomap_fragment = "#ifdef USE_AOMAP\n\tfloat ambientOcclusion = ( texture2D( aoMap, vUv2 ).r - 1.0 ) * aoMapIntensity + 1.0;\n\treflectedLight.indirectDiffuse *= ambientOcclusion;\n\t#if defined( USE_ENVMAP ) && defined( STANDARD )\n\t\tfloat dotNV = saturate( dot( geometry.normal, geometry.viewDir ) );\n\t\treflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.roughness );\n\t#endif\n#endif";

	var aomap_pars_fragment = "#ifdef USE_AOMAP\n\tuniform sampler2D aoMap;\n\tuniform float aoMapIntensity;\n#endif";

	var begin_vertex = "vec3 transformed = vec3( position );";

	var beginnormal_vertex = "vec3 objectNormal = vec3( normal );\n#ifdef USE_TANGENT\n\tvec3 objectTangent = vec3( tangent.xyz );\n#endif";

	var bsdfs = "vec3 BRDF_Lambert( const in vec3 diffuseColor ) {\n\treturn RECIPROCAL_PI * diffuseColor;\n}\nvec3 F_Schlick( const in vec3 f0, const in float f90, const in float dotVH ) {\n\tfloat fresnel = exp2( ( - 5.55473 * dotVH - 6.98316 ) * dotVH );\n\treturn f0 * ( 1.0 - fresnel ) + ( f90 * fresnel );\n}\nfloat F_Schlick( const in float f0, const in float f90, const in float dotVH ) {\n\tfloat fresnel = exp2( ( - 5.55473 * dotVH - 6.98316 ) * dotVH );\n\treturn f0 * ( 1.0 - fresnel ) + ( f90 * fresnel );\n}\nvec3 Schlick_to_F0( const in vec3 f, const in float f90, const in float dotVH ) {\n		float x = clamp( 1.0 - dotVH, 0.0, 1.0 );\n		float x2 = x * x;\n		float x5 = clamp( x * x2 * x2, 0.0, 0.9999 );\n		return ( f - vec3( f90 ) * x5 ) / ( 1.0 - x5 );\n}\nfloat V_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {\n\tfloat a2 = pow2( alpha );\n\tfloat gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\n\tfloat gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\n\treturn 0.5 / max( gv + gl, EPSILON );\n}\nfloat D_GGX( const in float alpha, const in float dotNH ) {\n\tfloat a2 = pow2( alpha );\n\tfloat denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0;\n\treturn RECIPROCAL_PI * a2 / pow2( denom );\n}\nvec3 BRDF_GGX( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, const in vec3 f0, const in float f90, const in float roughness ) {\n\tfloat alpha = pow2( roughness );\n\tvec3 halfDir = normalize( lightDir + viewDir );\n\tfloat dotNL = saturate( dot( normal, lightDir ) );\n\tfloat dotNV = saturate( dot( normal, viewDir ) );\n\tfloat dotNH = saturate( dot( normal, halfDir ) );\n\tfloat dotVH = saturate( dot( viewDir, halfDir ) );\n\tvec3 F = F_Schlick( f0, f90, dotVH );\n\tfloat V = V_GGX_SmithCorrelated( alpha, dotNL, dotNV );\n\tfloat D = D_GGX( alpha, dotNH );\n\treturn F * ( V * D );\n}\n#ifdef USE_IRIDESCENCE\n\tvec3 BRDF_GGX_Iridescence( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, const in vec3 f0, const in float f90, const in float iridescence, const in vec3 iridescenceFresnel, const in float roughness ) {\n\t\tfloat alpha = pow2( roughness );\n\t\tvec3 halfDir = normalize( lightDir + viewDir );\n\t\tfloat dotNL = saturate( dot( normal, lightDir ) );\n\t\tfloat dotNV = saturate( dot( normal, viewDir ) );\n\t\tfloat dotNH = saturate( dot( normal, halfDir ) );\n\t\tfloat dotVH = saturate( dot( viewDir, halfDir ) );\n\t\tvec3 F = mix( F_Schlick( f0, f90, dotVH ), iridescenceFresnel, iridescence );\n\t\tfloat V = V_GGX_SmithCorrelated( alpha, dotNL, dotNV );\n\t\tfloat D = D_GGX( alpha, dotNH );\n\t\treturn F * ( V * D );\n\t}\n#endif\nvec2 LTC_Uv( const in vec3 N, const in vec3 V, const in float roughness ) {\n\tconst float LUT_SIZE = 64.0;\n\tconst float LUT_SCALE = ( LUT_SIZE - 1.0 ) / LUT_SIZE;\n\tconst float LUT_BIAS = 0.5 / LUT_SIZE;\n\tfloat dotNV = saturate( dot( N, V ) );\n\tvec2 uv = vec2( roughness, sqrt( 1.0 - dotNV ) );\n\tuv = uv * LUT_SCALE + LUT_BIAS;\n\treturn uv;\n}\nfloat LTC_ClippedSphereFormFactor( const in vec3 f ) {\n\tfloat l = length( f );\n\treturn max( ( l * l + f.z ) / ( l + 1.0 ), 0.0 );\n}\nvec3 LTC_EdgeVectorFormFactor( const in vec3 v1, const in vec3 v2 ) {\n\tfloat x = dot( v1, v2 );\n\tfloat y = abs( x );\n\tfloat a = 0.8543985 + ( 0.4965155 + 0.0145206 * y ) * y;\n\tfloat b = 3.4175940 + ( 4.1616724 + y ) * y;\n\tfloat v = a / b;\n\tfloat theta_sintheta = ( x > 0.0 ) ? v : 0.5 * inversesqrt( max( 1.0 - x * x, 1e-7 ) ) - v;\n\treturn cross( v1, v2 ) * theta_sintheta;\n}\nvec3 LTC_Evaluate( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in vec3 rectCoords[ 4 ] ) {\n\tvec3 v1 = rectCoords[ 1 ] - rectCoords[ 0 ];\n\tvec3 v2 = rectCoords[ 3 ] - rectCoords[ 0 ];\n\tvec3 lightNormal = cross( v1, v2 );\n\tif( dot( lightNormal, P - rectCoords[ 0 ] ) < 0.0 ) return vec3( 0.0 );\n\tvec3 T1, T2;\n\tT1 = normalize( V - N * dot( V, N ) );\n\tT2 = - cross( N, T1 );\n\tmat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );\n\tvec3 coords[ 4 ];\n\tcoords[ 0 ] = mat * ( rectCoords[ 0 ] - P );\n\tcoords[ 1 ] = mat * ( rectCoords[ 1 ] - P );\n\tcoords[ 2 ] = mat * ( rectCoords[ 2 ] - P );\n\tcoords[ 3 ] = mat * ( rectCoords[ 3 ] - P );\n\tcoords[ 0 ] = normalize( coords[ 0 ] );\n\tcoords[ 1 ] = normalize( coords[ 1 ] );\n\tcoords[ 2 ] = normalize( coords[ 2 ] );\n\tcoords[ 3 ] = normalize( coords[ 3 ] );\n\tvec3 vectorFormFactor = vec3( 0.0 );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 0 ], coords[ 1 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 1 ], coords[ 2 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 2 ], coords[ 3 ] );\n\tvectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 3 ], coords[ 0 ] );\n\tfloat result = LTC_ClippedSphereFormFactor( vectorFormFactor );\n\treturn vec3( result );\n}\nfloat G_BlinnPhong_Implicit( ) {\n\treturn 0.25;\n}\nfloat D_BlinnPhong( const in float shininess, const in float dotNH ) {\n\treturn RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );\n}\nvec3 BRDF_BlinnPhong( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float shininess ) {\n\tvec3 halfDir = normalize( lightDir + viewDir );\n\tfloat dotNH = saturate( dot( normal, halfDir ) );\n\tfloat dotVH = saturate( dot( viewDir, halfDir ) );\n\tvec3 F = F_Schlick( specularColor, 1.0, dotVH );\n\tfloat G = G_BlinnPhong_Implicit( );\n\tfloat D = D_BlinnPhong( shininess, dotNH );\n\treturn F * ( G * D );\n}\n#if defined( USE_SHEEN )\nfloat D_Charlie( float roughness, float dotNH ) {\n\tfloat alpha = pow2( roughness );\n\tfloat invAlpha = 1.0 / alpha;\n\tfloat cos2h = dotNH * dotNH;\n\tfloat sin2h = max( 1.0 - cos2h, 0.0078125 );\n\treturn ( 2.0 + invAlpha ) * pow( sin2h, invAlpha * 0.5 ) / ( 2.0 * PI );\n}\nfloat V_Neubelt( float dotNV, float dotNL ) {\n\treturn saturate( 1.0 / ( 4.0 * ( dotNL + dotNV - dotNL * dotNV ) ) );\n}\nvec3 BRDF_Sheen( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, vec3 sheenColor, const in float sheenRoughness ) {\n\tvec3 halfDir = normalize( lightDir + viewDir );\n\tfloat dotNL = saturate( dot( normal, lightDir ) );\n\tfloat dotNV = saturate( dot( normal, viewDir ) );\n\tfloat dotNH = saturate( dot( normal, halfDir ) );\n\tfloat D = D_Charlie( sheenRoughness, dotNH );\n\tfloat V = V_Neubelt( dotNV, dotNL );\n\treturn sheenColor * ( D * V );\n}\n#endif";

	var iridescence_fragment = "#ifdef USE_IRIDESCENCE\n\tconst mat3 XYZ_TO_REC709 = mat3(\n\t\t 3.2404542, -0.9692660,	0.0556434,\n\t\t-1.5371385,	1.8760108, -0.2040259,\n\t\t-0.4985314,	0.0415560,	1.0572252\n\t);\n\tvec3 Fresnel0ToIor( vec3 fresnel0 ) {\n\t\tvec3 sqrtF0 = sqrt( fresnel0 );\n\t\treturn ( vec3( 1.0 ) + sqrtF0 ) / ( vec3( 1.0 ) - sqrtF0 );\n\t}\n\tvec3 IorToFresnel0( vec3 transmittedIor, float incidentIor ) {\n\t\treturn pow2( ( transmittedIor - vec3( incidentIor ) ) / ( transmittedIor + vec3( incidentIor ) ) );\n\t}\n\tfloat IorToFresnel0( float transmittedIor, float incidentIor ) {\n\t\treturn pow2( ( transmittedIor - incidentIor ) / ( transmittedIor + incidentIor ));\n\t}\n\tvec3 evalSensitivity( float OPD, vec3 shift ) {\n\t\tfloat phase = 2.0 * PI * OPD * 1.0e-9;\n\t\tvec3 val = vec3( 5.4856e-13, 4.4201e-13, 5.2481e-13 );\n\t\tvec3 pos = vec3( 1.6810e+06, 1.7953e+06, 2.2084e+06 );\n\t\tvec3 var = vec3( 4.3278e+09, 9.3046e+09, 6.6121e+09 );\n\t\tvec3 xyz = val * sqrt( 2.0 * PI * var ) * cos( pos * phase + shift ) * exp( - pow2( phase ) * var );\n\t\txyz.x += 9.7470e-14 * sqrt( 2.0 * PI * 4.5282e+09 ) * cos( 2.2399e+06 * phase + shift[ 0 ] ) * exp( - 4.5282e+09 * pow2( phase ) );\n\t\txyz /= 1.0685e-7;\n\t\tvec3 rgb = XYZ_TO_REC709 * xyz;\n\t\treturn rgb;\n\t}\n\tvec3 evalIridescence( float outsideIOR, float eta2, float cosTheta1, float thinFilmThickness, vec3 baseF0 ) {\n\t\tvec3 I;\n\t\tfloat iridescenceIOR = mix( outsideIOR, eta2, smoothstep( 0.0, 0.03, thinFilmThickness ) );\n\t\tfloat sinTheta2Sq = pow2( outsideIOR / iridescenceIOR ) * ( 1.0 - pow2( cosTheta1 ) );\n\t\tfloat cosTheta2Sq = 1.0 - sinTheta2Sq;\n\t\tif ( cosTheta2Sq < 0.0 ) {\n\t\t\t return vec3( 1.0 );\n\t\t}\n\t\tfloat cosTheta2 = sqrt( cosTheta2Sq );\n\t\tfloat R0 = IorToFresnel0( iridescenceIOR, outsideIOR );\n\t\tfloat R12 = F_Schlick( R0, 1.0, cosTheta1 );\n\t\tfloat R21 = R12;\n\t\tfloat T121 = 1.0 - R12;\n\t\tfloat phi12 = 0.0;\n\t\tif ( iridescenceIOR < outsideIOR ) phi12 = PI;\n\t\tfloat phi21 = PI - phi12;\n\t\tvec3 baseIOR = Fresnel0ToIor( clamp( baseF0, 0.0, 0.9999 ) );\t\tvec3 R1 = IorToFresnel0( baseIOR, iridescenceIOR );\n\t\tvec3 R23 = F_Schlick( R1, 1.0, cosTheta2 );\n\t\tvec3 phi23 = vec3( 0.0 );\n\t\tif ( baseIOR[ 0 ] < iridescenceIOR ) phi23[ 0 ] = PI;\n\t\tif ( baseIOR[ 1 ] < iridescenceIOR ) phi23[ 1 ] = PI;\n\t\tif ( baseIOR[ 2 ] < iridescenceIOR ) phi23[ 2 ] = PI;\n\t\tfloat OPD = 2.0 * iridescenceIOR * thinFilmThickness * cosTheta2;\n\t\tvec3 phi = vec3( phi21 ) + phi23;\n\t\tvec3 R123 = clamp( R12 * R23, 1e-5, 0.9999 );\n\t\tvec3 r123 = sqrt( R123 );\n\t\tvec3 Rs = pow2( T121 ) * R23 / ( vec3( 1.0 ) - R123 );\n\t\tvec3 C0 = R12 + Rs;\n\t\tI = C0;\n\t\tvec3 Cm = Rs - T121;\n\t\tfor ( int m = 1; m <= 2; ++ m ) {\n\t\t\tCm *= r123;\n\t\t\tvec3 Sm = 2.0 * evalSensitivity( float( m ) * OPD, float( m ) * phi );\n\t\t\tI += Cm * Sm;\n\t\t}\n\t\treturn max( I, vec3( 0.0 ) );\n\t}\n#endif";

	var bumpmap_pars_fragment = "#ifdef USE_BUMPMAP\n\tuniform sampler2D bumpMap;\n\tuniform float bumpScale;\n\tvec2 dHdxy_fwd() {\n\t\tvec2 dSTdx = dFdx( vUv );\n\t\tvec2 dSTdy = dFdy( vUv );\n\t\tfloat Hll = bumpScale * texture2D( bumpMap, vUv ).x;\n\t\tfloat dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;\n\t\tfloat dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;\n\t\treturn vec2( dBx, dBy );\n\t}\n\tvec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy, float faceDirection ) {\n\t\tvec3 vSigmaX = dFdx( surf_pos.xyz );\n\t\tvec3 vSigmaY = dFdy( surf_pos.xyz );\n\t\tvec3 vN = surf_norm;\n\t\tvec3 R1 = cross( vSigmaY, vN );\n\t\tvec3 R2 = cross( vN, vSigmaX );\n\t\tfloat fDet = dot( vSigmaX, R1 ) * faceDirection;\n\t\tvec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\n\t\treturn normalize( abs( fDet ) * surf_norm - vGrad );\n\t}\n#endif";

	var clipping_planes_fragment = "#if NUM_CLIPPING_PLANES > 0\n\tvec4 plane;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < UNION_CLIPPING_PLANES; i ++ ) {\n\t\tplane = clippingPlanes[ i ];\n\t\tif ( dot( vClipPosition, plane.xyz ) > plane.w ) discard;\n\t}\n\t#pragma unroll_loop_end\n\t#if UNION_CLIPPING_PLANES < NUM_CLIPPING_PLANES\n\t\tbool clipped = true;\n\t\t#pragma unroll_loop_start\n\t\tfor ( int i = UNION_CLIPPING_PLANES; i < NUM_CLIPPING_PLANES; i ++ ) {\n\t\t\tplane = clippingPlanes[ i ];\n\t\t\tclipped = ( dot( vClipPosition, plane.xyz ) > plane.w ) && clipped;\n\t\t}\n\t\t#pragma unroll_loop_end\n\t\tif ( clipped ) discard;\n\t#endif\n#endif";

	var clipping_planes_pars_fragment = "#if NUM_CLIPPING_PLANES > 0\n\tvarying vec3 vClipPosition;\n\tuniform vec4 clippingPlanes[ NUM_CLIPPING_PLANES ];\n#endif";

	var clipping_planes_pars_vertex = "#if NUM_CLIPPING_PLANES > 0\n\tvarying vec3 vClipPosition;\n#endif";

	var clipping_planes_vertex = "#if NUM_CLIPPING_PLANES > 0\n\tvClipPosition = - mvPosition.xyz;\n#endif";

	var color_fragment = "#if defined( USE_COLOR_ALPHA )\n\tdiffuseColor *= vColor;\n#elif defined( USE_COLOR )\n\tdiffuseColor.rgb *= vColor;\n#endif";

	var color_pars_fragment = "#if defined( USE_COLOR_ALPHA )\n\tvarying vec4 vColor;\n#elif defined( USE_COLOR )\n\tvarying vec3 vColor;\n#endif";

	var color_pars_vertex = "#if defined( USE_COLOR_ALPHA )\n\tvarying vec4 vColor;\n#elif defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )\n\tvarying vec3 vColor;\n#endif";

	var color_vertex = "#if defined( USE_COLOR_ALPHA )\n\tvColor = vec4( 1.0 );\n#elif defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR )\n\tvColor = vec3( 1.0 );\n#endif\n#ifdef USE_COLOR\n\tvColor *= color;\n#endif\n#ifdef USE_INSTANCING_COLOR\n\tvColor.xyz *= instanceColor.xyz;\n#endif";

	var common = "#define PI 3.141592653589793\n#define PI2 6.283185307179586\n#define PI_HALF 1.5707963267948966\n#define RECIPROCAL_PI 0.3183098861837907\n#define RECIPROCAL_PI2 0.15915494309189535\n#define EPSILON 1e-6\n#ifndef saturate\n#define saturate( a ) clamp( a, 0.0, 1.0 )\n#endif\n#define whiteComplement( a ) ( 1.0 - saturate( a ) )\nfloat pow2( const in float x ) { return x*x; }\nvec3 pow2( const in vec3 x ) { return x*x; }\nfloat pow3( const in float x ) { return x*x*x; }\nfloat pow4( const in float x ) { float x2 = x*x; return x2*x2; }\nfloat max3( const in vec3 v ) { return max( max( v.x, v.y ), v.z ); }\nfloat average( const in vec3 v ) { return dot( v, vec3( 0.3333333 ) ); }\nhighp float rand( const in vec2 uv ) {\n\tconst highp float a = 12.9898, b = 78.233, c = 43758.5453;\n\thighp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );\n\treturn fract( sin( sn ) * c );\n}\n#ifdef HIGH_PRECISION\n\tfloat precisionSafeLength( vec3 v ) { return length( v ); }\n#else\n\tfloat precisionSafeLength( vec3 v ) {\n\t\tfloat maxComponent = max3( abs( v ) );\n\t\treturn length( v / maxComponent ) * maxComponent;\n\t}\n#endif\nstruct IncidentLight {\n\tvec3 color;\n\tvec3 direction;\n\tbool visible;\n};\nstruct ReflectedLight {\n\tvec3 directDiffuse;\n\tvec3 directSpecular;\n\tvec3 indirectDiffuse;\n\tvec3 indirectSpecular;\n};\nstruct GeometricContext {\n\tvec3 position;\n\tvec3 normal;\n\tvec3 viewDir;\n#ifdef USE_CLEARCOAT\n\tvec3 clearcoatNormal;\n#endif\n};\nvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\n\treturn normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\n}\nvec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {\n\treturn normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );\n}\nmat3 transposeMat3( const in mat3 m ) {\n\tmat3 tmp;\n\ttmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );\n\ttmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );\n\ttmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );\n\treturn tmp;\n}\nfloat luminance( const in vec3 rgb ) {\n\tconst vec3 weights = vec3( 0.2126729, 0.7151522, 0.0721750 );\n\treturn dot( weights, rgb );\n}\nbool isPerspectiveMatrix( mat4 m ) {\n\treturn m[ 2 ][ 3 ] == - 1.0;\n}\nvec2 equirectUv( in vec3 dir ) {\n\tfloat u = atan( dir.z, dir.x ) * RECIPROCAL_PI2 + 0.5;\n\tfloat v = asin( clamp( dir.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\n\treturn vec2( u, v );\n}";

	var cube_uv_reflection_fragment = "#ifdef ENVMAP_TYPE_CUBE_UV\n\t#define cubeUV_minMipLevel 4.0\n\t#define cubeUV_minTileSize 16.0\n\tfloat getFace( vec3 direction ) {\n\t\tvec3 absDirection = abs( direction );\n\t\tfloat face = - 1.0;\n\t\tif ( absDirection.x > absDirection.z ) {\n\t\t\tif ( absDirection.x > absDirection.y )\n\t\t\t\tface = direction.x > 0.0 ? 0.0 : 3.0;\n\t\t\telse\n\t\t\t\tface = direction.y > 0.0 ? 1.0 : 4.0;\n\t\t} else {\n\t\t\tif ( absDirection.z > absDirection.y )\n\t\t\t\tface = direction.z > 0.0 ? 2.0 : 5.0;\n\t\t\telse\n\t\t\t\tface = direction.y > 0.0 ? 1.0 : 4.0;\n\t\t}\n\t\treturn face;\n\t}\n\tvec2 getUV( vec3 direction, float face ) {\n\t\tvec2 uv;\n\t\tif ( face == 0.0 ) {\n\t\t\tuv = vec2( direction.z, direction.y ) / abs( direction.x );\n\t\t} else if ( face == 1.0 ) {\n\t\t\tuv = vec2( - direction.x, - direction.z ) / abs( direction.y );\n\t\t} else if ( face == 2.0 ) {\n\t\t\tuv = vec2( - direction.x, direction.y ) / abs( direction.z );\n\t\t} else if ( face == 3.0 ) {\n\t\t\tuv = vec2( - direction.z, direction.y ) / abs( direction.x );\n\t\t} else if ( face == 4.0 ) {\n\t\t\tuv = vec2( - direction.x, direction.z ) / abs( direction.y );\n\t\t} else {\n\t\t\tuv = vec2( direction.x, direction.y ) / abs( direction.z );\n\t\t}\n\t\treturn 0.5 * ( uv + 1.0 );\n\t}\n\tvec3 bilinearCubeUV( sampler2D envMap, vec3 direction, float mipInt ) {\n\t\tfloat face = getFace( direction );\n\t\tfloat filterInt = max( cubeUV_minMipLevel - mipInt, 0.0 );\n\t\tmipInt = max( mipInt, cubeUV_minMipLevel );\n\t\tfloat faceSize = exp2( mipInt );\n\t\tvec2 uv = getUV( direction, face ) * ( faceSize - 2.0 ) + 1.0;\n\t\tif ( face > 2.0 ) {\n\t\t\tuv.y += faceSize;\n\t\t\tface -= 3.0;\n\t\t}\n\t\tuv.x += face * faceSize;\n\t\tuv.x += filterInt * 3.0 * cubeUV_minTileSize;\n\t\tuv.y += 4.0 * ( exp2( CUBEUV_MAX_MIP ) - faceSize );\n\t\tuv.x *= CUBEUV_TEXEL_WIDTH;\n\t\tuv.y *= CUBEUV_TEXEL_HEIGHT;\n\t\t#ifdef texture2DGradEXT\n\t\t\treturn texture2DGradEXT( envMap, uv, vec2( 0.0 ), vec2( 0.0 ) ).rgb;\n\t\t#else\n\t\t\treturn texture2D( envMap, uv ).rgb;\n\t\t#endif\n\t}\n\t#define r0 1.0\n\t#define v0 0.339\n\t#define m0 - 2.0\n\t#define r1 0.8\n\t#define v1 0.276\n\t#define m1 - 1.0\n\t#define r4 0.4\n\t#define v4 0.046\n\t#define m4 2.0\n\t#define r5 0.305\n\t#define v5 0.016\n\t#define m5 3.0\n\t#define r6 0.21\n\t#define v6 0.0038\n\t#define m6 4.0\n\tfloat roughnessToMip( float roughness ) {\n\t\tfloat mip = 0.0;\n\t\tif ( roughness >= r1 ) {\n\t\t\tmip = ( r0 - roughness ) * ( m1 - m0 ) / ( r0 - r1 ) + m0;\n\t\t} else if ( roughness >= r4 ) {\n\t\t\tmip = ( r1 - roughness ) * ( m4 - m1 ) / ( r1 - r4 ) + m1;\n\t\t} else if ( roughness >= r5 ) {\n\t\t\tmip = ( r4 - roughness ) * ( m5 - m4 ) / ( r4 - r5 ) + m4;\n\t\t} else if ( roughness >= r6 ) {\n\t\t\tmip = ( r5 - roughness ) * ( m6 - m5 ) / ( r5 - r6 ) + m5;\n\t\t} else {\n\t\t\tmip = - 2.0 * log2( 1.16 * roughness );\t\t}\n\t\treturn mip;\n\t}\n\tvec4 textureCubeUV( sampler2D envMap, vec3 sampleDir, float roughness ) {\n\t\tfloat mip = clamp( roughnessToMip( roughness ), m0, CUBEUV_MAX_MIP );\n\t\tfloat mipF = fract( mip );\n\t\tfloat mipInt = floor( mip );\n\t\tvec3 color0 = bilinearCubeUV( envMap, sampleDir, mipInt );\n\t\tif ( mipF == 0.0 ) {\n\t\t\treturn vec4( color0, 1.0 );\n\t\t} else {\n\t\t\tvec3 color1 = bilinearCubeUV( envMap, sampleDir, mipInt + 1.0 );\n\t\t\treturn vec4( mix( color0, color1, mipF ), 1.0 );\n\t\t}\n\t}\n#endif";

	var defaultnormal_vertex = "vec3 transformedNormal = objectNormal;\n#ifdef USE_INSTANCING\n\tmat3 m = mat3( instanceMatrix );\n\ttransformedNormal /= vec3( dot( m[ 0 ], m[ 0 ] ), dot( m[ 1 ], m[ 1 ] ), dot( m[ 2 ], m[ 2 ] ) );\n\ttransformedNormal = m * transformedNormal;\n#endif\ntransformedNormal = normalMatrix * transformedNormal;\n#ifdef FLIP_SIDED\n\ttransformedNormal = - transformedNormal;\n#endif\n#ifdef USE_TANGENT\n\tvec3 transformedTangent = ( modelViewMatrix * vec4( objectTangent, 0.0 ) ).xyz;\n\t#ifdef FLIP_SIDED\n\t\ttransformedTangent = - transformedTangent;\n\t#endif\n#endif";

	var displacementmap_pars_vertex = "#ifdef USE_DISPLACEMENTMAP\n\tuniform sampler2D displacementMap;\n\tuniform float displacementScale;\n\tuniform float displacementBias;\n#endif";

	var displacementmap_vertex = "#ifdef USE_DISPLACEMENTMAP\n\ttransformed += normalize( objectNormal ) * ( texture2D( displacementMap, vUv ).x * displacementScale + displacementBias );\n#endif";

	var emissivemap_fragment = "#ifdef USE_EMISSIVEMAP\n\tvec4 emissiveColor = texture2D( emissiveMap, vUv );\n\ttotalEmissiveRadiance *= emissiveColor.rgb;\n#endif";

	var emissivemap_pars_fragment = "#ifdef USE_EMISSIVEMAP\n\tuniform sampler2D emissiveMap;\n#endif";

	var encodings_fragment = "gl_FragColor = linearToOutputTexel( gl_FragColor );";

	var encodings_pars_fragment = "vec4 LinearToLinear( in vec4 value ) {\n\treturn value;\n}\nvec4 LinearTosRGB( in vec4 value ) {\n\treturn vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.a );\n}";

	var envmap_fragment = "#ifdef USE_ENVMAP\n\t#ifdef ENV_WORLDPOS\n\t\tvec3 cameraToFrag;\n\t\tif ( isOrthographic ) {\n\t\t\tcameraToFrag = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\n\t\t} else {\n\t\t\tcameraToFrag = normalize( vWorldPosition - cameraPosition );\n\t\t}\n\t\tvec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvec3 reflectVec = reflect( cameraToFrag, worldNormal );\n\t\t#else\n\t\t\tvec3 reflectVec = refract( cameraToFrag, worldNormal, refractionRatio );\n\t\t#endif\n\t#else\n\t\tvec3 reflectVec = vReflect;\n\t#endif\n\t#ifdef ENVMAP_TYPE_CUBE\n\t\tvec4 envColor = textureCube( envMap, vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );\n\t#elif defined( ENVMAP_TYPE_CUBE_UV )\n\t\tvec4 envColor = textureCubeUV( envMap, reflectVec, 0.0 );\n\t#else\n\t\tvec4 envColor = vec4( 0.0 );\n\t#endif\n\t#ifdef ENVMAP_BLENDING_MULTIPLY\n\t\toutgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );\n\t#elif defined( ENVMAP_BLENDING_MIX )\n\t\toutgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );\n\t#elif defined( ENVMAP_BLENDING_ADD )\n\t\toutgoingLight += envColor.xyz * specularStrength * reflectivity;\n\t#endif\n#endif";

	var envmap_common_pars_fragment = "#ifdef USE_ENVMAP\n\tuniform float envMapIntensity;\n\tuniform float flipEnvMap;\n\t#ifdef ENVMAP_TYPE_CUBE\n\t\tuniform samplerCube envMap;\n\t#else\n\t\tuniform sampler2D envMap;\n\t#endif\n\t\n#endif";

	var envmap_pars_fragment = "#ifdef USE_ENVMAP\n\tuniform float reflectivity;\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\n\t\t#define ENV_WORLDPOS\n\t#endif\n\t#ifdef ENV_WORLDPOS\n\t\tvarying vec3 vWorldPosition;\n\t\tuniform float refractionRatio;\n\t#else\n\t\tvarying vec3 vReflect;\n\t#endif\n#endif";

	var envmap_pars_vertex = "#ifdef USE_ENVMAP\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) ||defined( PHONG )\n\t\t#define ENV_WORLDPOS\n\t#endif\n\t#ifdef ENV_WORLDPOS\n\t\t\n\t\tvarying vec3 vWorldPosition;\n\t#else\n\t\tvarying vec3 vReflect;\n\t\tuniform float refractionRatio;\n\t#endif\n#endif";

	var envmap_vertex = "#ifdef USE_ENVMAP\n\t#ifdef ENV_WORLDPOS\n\t\tvWorldPosition = worldPosition.xyz;\n\t#else\n\t\tvec3 cameraToVertex;\n\t\tif ( isOrthographic ) {\n\t\t\tcameraToVertex = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\n\t\t} else {\n\t\t\tcameraToVertex = normalize( worldPosition.xyz - cameraPosition );\n\t\t}\n\t\tvec3 worldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n\t\t#ifdef ENVMAP_MODE_REFLECTION\n\t\t\tvReflect = reflect( cameraToVertex, worldNormal );\n\t\t#else\n\t\t\tvReflect = refract( cameraToVertex, worldNormal, refractionRatio );\n\t\t#endif\n\t#endif\n#endif";

	var fog_vertex = "#ifdef USE_FOG\n\tvFogDepth = - mvPosition.z;\n#endif";

	var fog_pars_vertex = "#ifdef USE_FOG\n\tvarying float vFogDepth;\n#endif";

	var fog_fragment = "#ifdef USE_FOG\n\t#ifdef FOG_EXP2\n\t\tfloat fogFactor = 1.0 - exp( - fogDensity * fogDensity * vFogDepth * vFogDepth );\n\t#else\n\t\tfloat fogFactor = smoothstep( fogNear, fogFar, vFogDepth );\n\t#endif\n\tgl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );\n#endif";

	var fog_pars_fragment = "#ifdef USE_FOG\n\tuniform vec3 fogColor;\n\tvarying float vFogDepth;\n\t#ifdef FOG_EXP2\n\t\tuniform float fogDensity;\n\t#else\n\t\tuniform float fogNear;\n\t\tuniform float fogFar;\n\t#endif\n#endif";

	var gradientmap_pars_fragment = "#ifdef USE_GRADIENTMAP\n\tuniform sampler2D gradientMap;\n#endif\nvec3 getGradientIrradiance( vec3 normal, vec3 lightDirection ) {\n\tfloat dotNL = dot( normal, lightDirection );\n\tvec2 coord = vec2( dotNL * 0.5 + 0.5, 0.0 );\n\t#ifdef USE_GRADIENTMAP\n\t\treturn vec3( texture2D( gradientMap, coord ).r );\n\t#else\n\t\treturn ( coord.x < 0.7 ) ? vec3( 0.7 ) : vec3( 1.0 );\n\t#endif\n}";

	var lightmap_fragment = "#ifdef USE_LIGHTMAP\n\tvec4 lightMapTexel = texture2D( lightMap, vUv2 );\n\tvec3 lightMapIrradiance = lightMapTexel.rgb * lightMapIntensity;\n\treflectedLight.indirectDiffuse += lightMapIrradiance;\n#endif";

	var lightmap_pars_fragment = "#ifdef USE_LIGHTMAP\n\tuniform sampler2D lightMap;\n\tuniform float lightMapIntensity;\n#endif";

	var lights_lambert_vertex = "vec3 diffuse = vec3( 1.0 );\nGeometricContext geometry;\ngeometry.position = mvPosition.xyz;\ngeometry.normal = normalize( transformedNormal );\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( -mvPosition.xyz );\nGeometricContext backGeometry;\nbackGeometry.position = geometry.position;\nbackGeometry.normal = -geometry.normal;\nbackGeometry.viewDir = geometry.viewDir;\nvLightFront = vec3( 0.0 );\nvIndirectFront = vec3( 0.0 );\n#ifdef DOUBLE_SIDED\n\tvLightBack = vec3( 0.0 );\n\tvIndirectBack = vec3( 0.0 );\n#endif\nIncidentLight directLight;\nfloat dotNL;\nvec3 directLightColor_Diffuse;\nvIndirectFront += getAmbientLightIrradiance( ambientLightColor );\nvIndirectFront += getLightProbeIrradiance( lightProbe, geometry.normal );\n#ifdef DOUBLE_SIDED\n\tvIndirectBack += getAmbientLightIrradiance( ambientLightColor );\n\tvIndirectBack += getLightProbeIrradiance( lightProbe, backGeometry.normal );\n#endif\n#if NUM_POINT_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tgetPointLightInfo( pointLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( - dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if NUM_SPOT_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tgetSpotLightInfo( spotLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( - dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if NUM_DIR_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tgetDirectionalLightInfo( directionalLights[ i ], geometry, directLight );\n\t\tdotNL = dot( geometry.normal, directLight.direction );\n\t\tdirectLightColor_Diffuse = directLight.color;\n\t\tvLightFront += saturate( dotNL ) * directLightColor_Diffuse;\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvLightBack += saturate( - dotNL ) * directLightColor_Diffuse;\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if NUM_HEMI_LIGHTS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n\t\tvIndirectFront += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry.normal );\n\t\t#ifdef DOUBLE_SIDED\n\t\t\tvIndirectBack += getHemisphereLightIrradiance( hemisphereLights[ i ], backGeometry.normal );\n\t\t#endif\n\t}\n\t#pragma unroll_loop_end\n#endif";

	var lights_pars_begin = "uniform bool receiveShadow;\nuniform vec3 ambientLightColor;\nuniform vec3 lightProbe[ 9 ];\nvec3 shGetIrradianceAt( in vec3 normal, in vec3 shCoefficients[ 9 ] ) {\n\tfloat x = normal.x, y = normal.y, z = normal.z;\n\tvec3 result = shCoefficients[ 0 ] * 0.886227;\n\tresult += shCoefficients[ 1 ] * 2.0 * 0.511664 * y;\n\tresult += shCoefficients[ 2 ] * 2.0 * 0.511664 * z;\n\tresult += shCoefficients[ 3 ] * 2.0 * 0.511664 * x;\n\tresult += shCoefficients[ 4 ] * 2.0 * 0.429043 * x * y;\n\tresult += shCoefficients[ 5 ] * 2.0 * 0.429043 * y * z;\n\tresult += shCoefficients[ 6 ] * ( 0.743125 * z * z - 0.247708 );\n\tresult += shCoefficients[ 7 ] * 2.0 * 0.429043 * x * z;\n\tresult += shCoefficients[ 8 ] * 0.429043 * ( x * x - y * y );\n\treturn result;\n}\nvec3 getLightProbeIrradiance( const in vec3 lightProbe[ 9 ], const in vec3 normal ) {\n\tvec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n\tvec3 irradiance = shGetIrradianceAt( worldNormal, lightProbe );\n\treturn irradiance;\n}\nvec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {\n\tvec3 irradiance = ambientLightColor;\n\treturn irradiance;\n}\nfloat getDistanceAttenuation( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {\n\t#if defined ( PHYSICALLY_CORRECT_LIGHTS )\n\t\tfloat distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );\n\t\tif ( cutoffDistance > 0.0 ) {\n\t\t\tdistanceFalloff *= pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );\n\t\t}\n\t\treturn distanceFalloff;\n\t#else\n\t\tif ( cutoffDistance > 0.0 && decayExponent > 0.0 ) {\n\t\t\treturn pow( saturate( - lightDistance / cutoffDistance + 1.0 ), decayExponent );\n\t\t}\n\t\treturn 1.0;\n\t#endif\n}\nfloat getSpotAttenuation( const in float coneCosine, const in float penumbraCosine, const in float angleCosine ) {\n\treturn smoothstep( coneCosine, penumbraCosine, angleCosine );\n}\n#if NUM_DIR_LIGHTS > 0\n\tstruct DirectionalLight {\n\t\tvec3 direction;\n\t\tvec3 color;\n\t};\n\tuniform DirectionalLight directionalLights[ NUM_DIR_LIGHTS ];\n\tvoid getDirectionalLightInfo( const in DirectionalLight directionalLight, const in GeometricContext geometry, out IncidentLight light ) {\n\t\tlight.color = directionalLight.color;\n\t\tlight.direction = directionalLight.direction;\n\t\tlight.visible = true;\n\t}\n#endif\n#if NUM_POINT_LIGHTS > 0\n\tstruct PointLight {\n\t\tvec3 position;\n\t\tvec3 color;\n\t\tfloat distance;\n\t\tfloat decay;\n\t};\n\tuniform PointLight pointLights[ NUM_POINT_LIGHTS ];\n\tvoid getPointLightInfo( const in PointLight pointLight, const in GeometricContext geometry, out IncidentLight light ) {\n\t\tvec3 lVector = pointLight.position - geometry.position;\n\t\tlight.direction = normalize( lVector );\n\t\tfloat lightDistance = length( lVector );\n\t\tlight.color = pointLight.color;\n\t\tlight.color *= getDistanceAttenuation( lightDistance, pointLight.distance, pointLight.decay );\n\t\tlight.visible = ( light.color != vec3( 0.0 ) );\n\t}\n#endif\n#if NUM_SPOT_LIGHTS > 0\n\tstruct SpotLight {\n\t\tvec3 position;\n\t\tvec3 direction;\n\t\tvec3 color;\n\t\tfloat distance;\n\t\tfloat decay;\n\t\tfloat coneCos;\n\t\tfloat penumbraCos;\n\t};\n\tuniform SpotLight spotLights[ NUM_SPOT_LIGHTS ];\n\tvoid getSpotLightInfo( const in SpotLight spotLight, const in GeometricContext geometry, out IncidentLight light ) {\n\t\tvec3 lVector = spotLight.position - geometry.position;\n\t\tlight.direction = normalize( lVector );\n\t\tfloat angleCos = dot( light.direction, spotLight.direction );\n\t\tfloat spotAttenuation = getSpotAttenuation( spotLight.coneCos, spotLight.penumbraCos, angleCos );\n\t\tif ( spotAttenuation > 0.0 ) {\n\t\t\tfloat lightDistance = length( lVector );\n\t\t\tlight.color = spotLight.color * spotAttenuation;\n\t\t\tlight.color *= getDistanceAttenuation( lightDistance, spotLight.distance, spotLight.decay );\n\t\t\tlight.visible = ( light.color != vec3( 0.0 ) );\n\t\t} else {\n\t\t\tlight.color = vec3( 0.0 );\n\t\t\tlight.visible = false;\n\t\t}\n\t}\n#endif\n#if NUM_RECT_AREA_LIGHTS > 0\n\tstruct RectAreaLight {\n\t\tvec3 color;\n\t\tvec3 position;\n\t\tvec3 halfWidth;\n\t\tvec3 halfHeight;\n\t};\n\tuniform sampler2D ltc_1;\tuniform sampler2D ltc_2;\n\tuniform RectAreaLight rectAreaLights[ NUM_RECT_AREA_LIGHTS ];\n#endif\n#if NUM_HEMI_LIGHTS > 0\n\tstruct HemisphereLight {\n\t\tvec3 direction;\n\t\tvec3 skyColor;\n\t\tvec3 groundColor;\n\t};\n\tuniform HemisphereLight hemisphereLights[ NUM_HEMI_LIGHTS ];\n\tvec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in vec3 normal ) {\n\t\tfloat dotNL = dot( normal, hemiLight.direction );\n\t\tfloat hemiDiffuseWeight = 0.5 * dotNL + 0.5;\n\t\tvec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );\n\t\treturn irradiance;\n\t}\n#endif";

	var envmap_physical_pars_fragment = "#if defined( USE_ENVMAP )\n\tvec3 getIBLIrradiance( const in vec3 normal ) {\n\t\t#if defined( ENVMAP_TYPE_CUBE_UV )\n\t\t\tvec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n\t\t\tvec4 envMapColor = textureCubeUV( envMap, worldNormal, 1.0 );\n\t\t\treturn PI * envMapColor.rgb * envMapIntensity;\n\t\t#else\n\t\t\treturn vec3( 0.0 );\n\t\t#endif\n\t}\n\tvec3 getIBLRadiance( const in vec3 viewDir, const in vec3 normal, const in float roughness ) {\n\t\t#if defined( ENVMAP_TYPE_CUBE_UV )\n\t\t\tvec3 reflectVec = reflect( - viewDir, normal );\n\t\t\treflectVec = normalize( mix( reflectVec, normal, roughness * roughness) );\n\t\t\treflectVec = inverseTransformDirection( reflectVec, viewMatrix );\n\t\t\tvec4 envMapColor = textureCubeUV( envMap, reflectVec, roughness );\n\t\t\treturn envMapColor.rgb * envMapIntensity;\n\t\t#else\n\t\t\treturn vec3( 0.0 );\n\t\t#endif\n\t}\n#endif";

	var lights_toon_fragment = "ToonMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;";

	var lights_toon_pars_fragment = "varying vec3 vViewPosition;\nstruct ToonMaterial {\n\tvec3 diffuseColor;\n};\nvoid RE_Direct_Toon( const in IncidentLight directLight, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\n\tvec3 irradiance = getGradientIrradiance( geometry.normal, directLight.direction ) * directLight.color;\n\treflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectDiffuse_Toon( const in vec3 irradiance, const in GeometricContext geometry, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\n#define RE_Direct\t\t\t\tRE_Direct_Toon\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_Toon\n#define Material_LightProbeLOD( material )\t(0)";

	var lights_phong_fragment = "BlinnPhongMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;\nmaterial.specularColor = specular;\nmaterial.specularShininess = shininess;\nmaterial.specularStrength = specularStrength;";

	var lights_phong_pars_fragment = "varying vec3 vViewPosition;\nstruct BlinnPhongMaterial {\n\tvec3 diffuseColor;\n\tvec3 specularColor;\n\tfloat specularShininess;\n\tfloat specularStrength;\n};\nvoid RE_Direct_BlinnPhong( const in IncidentLight directLight, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n\tvec3 irradiance = dotNL * directLight.color;\n\treflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n\treflectedLight.directSpecular += irradiance * BRDF_BlinnPhong( directLight.direction, geometry.viewDir, geometry.normal, material.specularColor, material.specularShininess ) * material.specularStrength;\n}\nvoid RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in GeometricContext geometry, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\n#define RE_Direct\t\t\t\tRE_Direct_BlinnPhong\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_BlinnPhong\n#define Material_LightProbeLOD( material )\t(0)";

	var lights_physical_fragment = "PhysicalMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb * ( 1.0 - metalnessFactor );\nvec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );\nfloat geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );\nmaterial.roughness = max( roughnessFactor, 0.0525 );material.roughness += geometryRoughness;\nmaterial.roughness = min( material.roughness, 1.0 );\n#ifdef IOR\n\t#ifdef SPECULAR\n\t\tfloat specularIntensityFactor = specularIntensity;\n\t\tvec3 specularColorFactor = specularColor;\n\t\t#ifdef USE_SPECULARINTENSITYMAP\n\t\t\tspecularIntensityFactor *= texture2D( specularIntensityMap, vUv ).a;\n\t\t#endif\n\t\t#ifdef USE_SPECULARCOLORMAP\n\t\t\tspecularColorFactor *= texture2D( specularColorMap, vUv ).rgb;\n\t\t#endif\n\t\tmaterial.specularF90 = mix( specularIntensityFactor, 1.0, metalnessFactor );\n\t#else\n\t\tfloat specularIntensityFactor = 1.0;\n\t\tvec3 specularColorFactor = vec3( 1.0 );\n\t\tmaterial.specularF90 = 1.0;\n\t#endif\n\tmaterial.specularColor = mix( min( pow2( ( ior - 1.0 ) / ( ior + 1.0 ) ) * specularColorFactor, vec3( 1.0 ) ) * specularIntensityFactor, diffuseColor.rgb, metalnessFactor );\n#else\n\tmaterial.specularColor = mix( vec3( 0.04 ), diffuseColor.rgb, metalnessFactor );\n\tmaterial.specularF90 = 1.0;\n#endif\n#ifdef USE_CLEARCOAT\n\tmaterial.clearcoat = clearcoat;\n\tmaterial.clearcoatRoughness = clearcoatRoughness;\n\tmaterial.clearcoatF0 = vec3( 0.04 );\n\tmaterial.clearcoatF90 = 1.0;\n\t#ifdef USE_CLEARCOATMAP\n\t\tmaterial.clearcoat *= texture2D( clearcoatMap, vUv ).x;\n\t#endif\n\t#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n\t\tmaterial.clearcoatRoughness *= texture2D( clearcoatRoughnessMap, vUv ).y;\n\t#endif\n\tmaterial.clearcoat = saturate( material.clearcoat );\tmaterial.clearcoatRoughness = max( material.clearcoatRoughness, 0.0525 );\n\tmaterial.clearcoatRoughness += geometryRoughness;\n\tmaterial.clearcoatRoughness = min( material.clearcoatRoughness, 1.0 );\n#endif\n#ifdef USE_IRIDESCENCE\n\tmaterial.iridescence = iridescence;\n\tmaterial.iridescenceIOR = iridescenceIOR;\n\t#ifdef USE_IRIDESCENCEMAP\n\t\tmaterial.iridescence *= texture2D( iridescenceMap, vUv ).r;\n\t#endif\n\t#ifdef USE_IRIDESCENCE_THICKNESSMAP\n\t\tmaterial.iridescenceThickness = (iridescenceThicknessMaximum - iridescenceThicknessMinimum) * texture2D( iridescenceThicknessMap, vUv ).g + iridescenceThicknessMinimum;\n\t#else\n\t\tmaterial.iridescenceThickness = iridescenceThicknessMaximum;\n\t#endif\n#endif\n#ifdef USE_SHEEN\n\tmaterial.sheenColor = sheenColor;\n\t#ifdef USE_SHEENCOLORMAP\n\t\tmaterial.sheenColor *= texture2D( sheenColorMap, vUv ).rgb;\n\t#endif\n\tmaterial.sheenRoughness = clamp( sheenRoughness, 0.07, 1.0 );\n\t#ifdef USE_SHEENROUGHNESSMAP\n\t\tmaterial.sheenRoughness *= texture2D( sheenRoughnessMap, vUv ).a;\n\t#endif\n#endif";

	var lights_physical_pars_fragment = "struct PhysicalMaterial {\n\tvec3 diffuseColor;\n\tfloat roughness;\n\tvec3 specularColor;\n\tfloat specularF90;\n\t#ifdef USE_CLEARCOAT\n\t\tfloat clearcoat;\n\t\tfloat clearcoatRoughness;\n\t\tvec3 clearcoatF0;\n\t\tfloat clearcoatF90;\n\t#endif\n\t#ifdef USE_IRIDESCENCE\n\t\tfloat iridescence;\n\t\tfloat iridescenceIOR;\n\t\tfloat iridescenceThickness;\n\t\tvec3 iridescenceFresnel;\n\t\tvec3 iridescenceF0;\n\t#endif\n\t#ifdef USE_SHEEN\n\t\tvec3 sheenColor;\n\t\tfloat sheenRoughness;\n\t#endif\n};\nvec3 clearcoatSpecular = vec3( 0.0 );\nvec3 sheenSpecular = vec3( 0.0 );\nfloat IBLSheenBRDF( const in vec3 normal, const in vec3 viewDir, const in float roughness) {\n\tfloat dotNV = saturate( dot( normal, viewDir ) );\n\tfloat r2 = roughness * roughness;\n\tfloat a = roughness < 0.25 ? -339.2 * r2 + 161.4 * roughness - 25.9 : -8.48 * r2 + 14.3 * roughness - 9.95;\n\tfloat b = roughness < 0.25 ? 44.0 * r2 - 23.7 * roughness + 3.26 : 1.97 * r2 - 3.27 * roughness + 0.72;\n\tfloat DG = exp( a * dotNV + b ) + ( roughness < 0.25 ? 0.0 : 0.1 * ( roughness - 0.25 ) );\n\treturn saturate( DG * RECIPROCAL_PI );\n}\nvec2 DFGApprox( const in vec3 normal, const in vec3 viewDir, const in float roughness ) {\n\tfloat dotNV = saturate( dot( normal, viewDir ) );\n\tconst vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );\n\tconst vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );\n\tvec4 r = roughness * c0 + c1;\n\tfloat a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;\n\tvec2 fab = vec2( - 1.04, 1.04 ) * a004 + r.zw;\n\treturn fab;\n}\nvec3 EnvironmentBRDF( const in vec3 normal, const in vec3 viewDir, const in vec3 specularColor, const in float specularF90, const in float roughness ) {\n\tvec2 fab = DFGApprox( normal, viewDir, roughness );\n\treturn specularColor * fab.x + specularF90 * fab.y;\n}\n#ifdef USE_IRIDESCENCE\nvoid computeMultiscatteringIridescence( const in vec3 normal, const in vec3 viewDir, const in vec3 specularColor, const in float specularF90, const in float iridescence, const in vec3 iridescenceF0, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {\n#else\nvoid computeMultiscattering( const in vec3 normal, const in vec3 viewDir, const in vec3 specularColor, const in float specularF90, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {\n#endif\n\tvec2 fab = DFGApprox( normal, viewDir, roughness );\n\t#ifdef USE_IRIDESCENCE\n\t\tvec3 Fr = mix( specularColor, iridescenceF0, iridescence );\n\t#else\n\t\tvec3 Fr = specularColor;\n\t#endif\n\tvec3 FssEss = Fr * fab.x + specularF90 * fab.y;\n\tfloat Ess = fab.x + fab.y;\n\tfloat Ems = 1.0 - Ess;\n\tvec3 Favg = Fr + ( 1.0 - Fr ) * 0.047619;\tvec3 Fms = FssEss * Favg / ( 1.0 - Ems * Favg );\n\tsingleScatter += FssEss;\n\tmultiScatter += Fms * Ems;\n}\n#if NUM_RECT_AREA_LIGHTS > 0\n\tvoid RE_Direct_RectArea_Physical( const in RectAreaLight rectAreaLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\t\tvec3 normal = geometry.normal;\n\t\tvec3 viewDir = geometry.viewDir;\n\t\tvec3 position = geometry.position;\n\t\tvec3 lightPos = rectAreaLight.position;\n\t\tvec3 halfWidth = rectAreaLight.halfWidth;\n\t\tvec3 halfHeight = rectAreaLight.halfHeight;\n\t\tvec3 lightColor = rectAreaLight.color;\n\t\tfloat roughness = material.roughness;\n\t\tvec3 rectCoords[ 4 ];\n\t\trectCoords[ 0 ] = lightPos + halfWidth - halfHeight;\t\trectCoords[ 1 ] = lightPos - halfWidth - halfHeight;\n\t\trectCoords[ 2 ] = lightPos - halfWidth + halfHeight;\n\t\trectCoords[ 3 ] = lightPos + halfWidth + halfHeight;\n\t\tvec2 uv = LTC_Uv( normal, viewDir, roughness );\n\t\tvec4 t1 = texture2D( ltc_1, uv );\n\t\tvec4 t2 = texture2D( ltc_2, uv );\n\t\tmat3 mInv = mat3(\n\t\t\tvec3( t1.x, 0, t1.y ),\n\t\t\tvec3(		0, 1,		0 ),\n\t\t\tvec3( t1.z, 0, t1.w )\n\t\t);\n\t\tvec3 fresnel = ( material.specularColor * t2.x + ( vec3( 1.0 ) - material.specularColor ) * t2.y );\n\t\treflectedLight.directSpecular += lightColor * fresnel * LTC_Evaluate( normal, viewDir, position, mInv, rectCoords );\n\t\treflectedLight.directDiffuse += lightColor * material.diffuseColor * LTC_Evaluate( normal, viewDir, position, mat3( 1.0 ), rectCoords );\n\t}\n#endif\nvoid RE_Direct_Physical( const in IncidentLight directLight, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\tfloat dotNL = saturate( dot( geometry.normal, directLight.direction ) );\n\tvec3 irradiance = dotNL * directLight.color;\n\t#ifdef USE_CLEARCOAT\n\t\tfloat dotNLcc = saturate( dot( geometry.clearcoatNormal, directLight.direction ) );\n\t\tvec3 ccIrradiance = dotNLcc * directLight.color;\n\t\tclearcoatSpecular += ccIrradiance * BRDF_GGX( directLight.direction, geometry.viewDir, geometry.clearcoatNormal, material.clearcoatF0, material.clearcoatF90, material.clearcoatRoughness );\n\t#endif\n\t#ifdef USE_SHEEN\n\t\tsheenSpecular += irradiance * BRDF_Sheen( directLight.direction, geometry.viewDir, geometry.normal, material.sheenColor, material.sheenRoughness );\n\t#endif\n\t#ifdef USE_IRIDESCENCE\n\t\treflectedLight.directSpecular += irradiance * BRDF_GGX_Iridescence( directLight.direction, geometry.viewDir, geometry.normal, material.specularColor, material.specularF90, material.iridescence, material.iridescenceFresnel, material.roughness );\n\t#else\n\t\treflectedLight.directSpecular += irradiance * BRDF_GGX( directLight.direction, geometry.viewDir, geometry.normal, material.specularColor, material.specularF90, material.roughness );\n\t#endif\n\treflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n\treflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectSpecular_Physical( const in vec3 radiance, const in vec3 irradiance, const in vec3 clearcoatRadiance, const in GeometricContext geometry, const in PhysicalMaterial material, inout ReflectedLight reflectedLight) {\n\t#ifdef USE_CLEARCOAT\n\t\tclearcoatSpecular += clearcoatRadiance * EnvironmentBRDF( geometry.clearcoatNormal, geometry.viewDir, material.clearcoatF0, material.clearcoatF90, material.clearcoatRoughness );\n\t#endif\n\t#ifdef USE_SHEEN\n\t\tsheenSpecular += irradiance * material.sheenColor * IBLSheenBRDF( geometry.normal, geometry.viewDir, material.sheenRoughness );\n\t#endif\n\tvec3 singleScattering = vec3( 0.0 );\n\tvec3 multiScattering = vec3( 0.0 );\n\tvec3 cosineWeightedIrradiance = irradiance * RECIPROCAL_PI;\n\t#ifdef USE_IRIDESCENCE\n\t\tcomputeMultiscatteringIridescence( geometry.normal, geometry.viewDir, material.specularColor, material.specularF90, material.iridescence, material.iridescenceFresnel, material.roughness, singleScattering, multiScattering );\n\t#else\n\t\tcomputeMultiscattering( geometry.normal, geometry.viewDir, material.specularColor, material.specularF90, material.roughness, singleScattering, multiScattering );\n\t#endif\n\tvec3 totalScattering = singleScattering + multiScattering;\n\tvec3 diffuse = material.diffuseColor * ( 1.0 - max( max( totalScattering.r, totalScattering.g ), totalScattering.b ) );\n\treflectedLight.indirectSpecular += radiance * singleScattering;\n\treflectedLight.indirectSpecular += multiScattering * cosineWeightedIrradiance;\n\treflectedLight.indirectDiffuse += diffuse * cosineWeightedIrradiance;\n}\n#define RE_Direct\t\t\t\tRE_Direct_Physical\n#define RE_Direct_RectArea\t\tRE_Direct_RectArea_Physical\n#define RE_IndirectDiffuse\t\tRE_IndirectDiffuse_Physical\n#define RE_IndirectSpecular\t\tRE_IndirectSpecular_Physical\nfloat computeSpecularOcclusion( const in float dotNV, const in float ambientOcclusion, const in float roughness ) {\n\treturn saturate( pow( dotNV + ambientOcclusion, exp2( - 16.0 * roughness - 1.0 ) ) - 1.0 + ambientOcclusion );\n}";

	var lights_fragment_begin = "\nGeometricContext geometry;\ngeometry.position = - vViewPosition;\ngeometry.normal = normal;\ngeometry.viewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( vViewPosition );\n#ifdef USE_CLEARCOAT\n\tgeometry.clearcoatNormal = clearcoatNormal;\n#endif\n#ifdef USE_IRIDESCENCE\n\tfloat dotNVi = saturate( dot( normal, geometry.viewDir ) );\n\tif ( material.iridescenceThickness == 0.0 ) {\n\t\tmaterial.iridescence = 0.0;\n\t} else {\n\t\tmaterial.iridescence = saturate( material.iridescence );\n\t}\n\tif ( material.iridescence > 0.0 ) {\n\t\tmaterial.iridescenceFresnel = evalIridescence( 1.0, material.iridescenceIOR, dotNVi, material.iridescenceThickness, material.specularColor );\n\t\tmaterial.iridescenceF0 = Schlick_to_F0( material.iridescenceFresnel, 1.0, dotNVi );\n\t}\n#endif\nIncidentLight directLight;\n#if ( NUM_POINT_LIGHTS > 0 ) && defined( RE_Direct )\n\tPointLight pointLight;\n\t#if defined( USE_SHADOWMAP ) && NUM_POINT_LIGHT_SHADOWS > 0\n\tPointLightShadow pointLightShadow;\n\t#endif\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n\t\tpointLight = pointLights[ i ];\n\t\tgetPointLightInfo( pointLight, geometry, directLight );\n\t\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_POINT_LIGHT_SHADOWS )\n\t\tpointLightShadow = pointLightShadows[ i ];\n\t\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getPointShadow( pointShadowMap[ i ], pointLightShadow.shadowMapSize, pointLightShadow.shadowBias, pointLightShadow.shadowRadius, vPointShadowCoord[ i ], pointLightShadow.shadowCameraNear, pointLightShadow.shadowCameraFar ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if ( NUM_SPOT_LIGHTS > 0 ) && defined( RE_Direct )\n\tSpotLight spotLight;\n\t#if defined( USE_SHADOWMAP ) && NUM_SPOT_LIGHT_SHADOWS > 0\n\tSpotLightShadow spotLightShadow;\n\t#endif\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n\t\tspotLight = spotLights[ i ];\n\t\tgetSpotLightInfo( spotLight, geometry, directLight );\n\t\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_SPOT_LIGHT_SHADOWS )\n\t\tspotLightShadow = spotLightShadows[ i ];\n\t\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( spotShadowMap[ i ], spotLightShadow.shadowMapSize, spotLightShadow.shadowBias, spotLightShadow.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if ( NUM_DIR_LIGHTS > 0 ) && defined( RE_Direct )\n\tDirectionalLight directionalLight;\n\t#if defined( USE_SHADOWMAP ) && NUM_DIR_LIGHT_SHADOWS > 0\n\tDirectionalLightShadow directionalLightShadow;\n\t#endif\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n\t\tdirectionalLight = directionalLights[ i ];\n\t\tgetDirectionalLightInfo( directionalLight, geometry, directLight );\n\t\t#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_DIR_LIGHT_SHADOWS )\n\t\tdirectionalLightShadow = directionalLightShadows[ i ];\n\t\tdirectLight.color *= all( bvec2( directLight.visible, receiveShadow ) ) ? getShadow( directionalShadowMap[ i ], directionalLightShadow.shadowMapSize, directionalLightShadow.shadowBias, directionalLightShadow.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n\t\t#endif\n\t\tRE_Direct( directLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if ( NUM_RECT_AREA_LIGHTS > 0 ) && defined( RE_Direct_RectArea )\n\tRectAreaLight rectAreaLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_RECT_AREA_LIGHTS; i ++ ) {\n\t\trectAreaLight = rectAreaLights[ i ];\n\t\tRE_Direct_RectArea( rectAreaLight, geometry, material, reflectedLight );\n\t}\n\t#pragma unroll_loop_end\n#endif\n#if defined( RE_IndirectDiffuse )\n\tvec3 iblIrradiance = vec3( 0.0 );\n\tvec3 irradiance = getAmbientLightIrradiance( ambientLightColor );\n\tirradiance += getLightProbeIrradiance( lightProbe, geometry.normal );\n\t#if ( NUM_HEMI_LIGHTS > 0 )\n\t\t#pragma unroll_loop_start\n\t\tfor ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n\t\t\tirradiance += getHemisphereLightIrradiance( hemisphereLights[ i ], geometry.normal );\n\t\t}\n\t\t#pragma unroll_loop_end\n\t#endif\n#endif\n#if defined( RE_IndirectSpecular )\n\tvec3 radiance = vec3( 0.0 );\n\tvec3 clearcoatRadiance = vec3( 0.0 );\n#endif";

	var lights_fragment_maps = "#if defined( RE_IndirectDiffuse )\n\t#ifdef USE_LIGHTMAP\n\t\tvec4 lightMapTexel = texture2D( lightMap, vUv2 );\n\t\tvec3 lightMapIrradiance = lightMapTexel.rgb * lightMapIntensity;\n\t\tirradiance += lightMapIrradiance;\n\t#endif\n\t#if defined( USE_ENVMAP ) && defined( STANDARD ) && defined( ENVMAP_TYPE_CUBE_UV )\n\t\tiblIrradiance += getIBLIrradiance( geometry.normal );\n\t#endif\n#endif\n#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )\n\tradiance += getIBLRadiance( geometry.viewDir, geometry.normal, material.roughness );\n\t#ifdef USE_CLEARCOAT\n\t\tclearcoatRadiance += getIBLRadiance( geometry.viewDir, geometry.clearcoatNormal, material.clearcoatRoughness );\n\t#endif\n#endif";

	var lights_fragment_end = "#if defined( RE_IndirectDiffuse )\n\tRE_IndirectDiffuse( irradiance, geometry, material, reflectedLight );\n#endif\n#if defined( RE_IndirectSpecular )\n\tRE_IndirectSpecular( radiance, iblIrradiance, clearcoatRadiance, geometry, material, reflectedLight );\n#endif";

	var logdepthbuf_fragment = "#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\n\tgl_FragDepthEXT = vIsPerspective == 0.0 ? gl_FragCoord.z : log2( vFragDepth ) * logDepthBufFC * 0.5;\n#endif";

	var logdepthbuf_pars_fragment = "#if defined( USE_LOGDEPTHBUF ) && defined( USE_LOGDEPTHBUF_EXT )\n\tuniform float logDepthBufFC;\n\tvarying float vFragDepth;\n\tvarying float vIsPerspective;\n#endif";

	var logdepthbuf_pars_vertex = "#ifdef USE_LOGDEPTHBUF\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvarying float vFragDepth;\n\t\tvarying float vIsPerspective;\n\t#else\n\t\tuniform float logDepthBufFC;\n\t#endif\n#endif";

	var logdepthbuf_vertex = "#ifdef USE_LOGDEPTHBUF\n\t#ifdef USE_LOGDEPTHBUF_EXT\n\t\tvFragDepth = 1.0 + gl_Position.w;\n\t\tvIsPerspective = float( isPerspectiveMatrix( projectionMatrix ) );\n\t#else\n\t\tif ( isPerspectiveMatrix( projectionMatrix ) ) {\n\t\t\tgl_Position.z = log2( max( EPSILON, gl_Position.w + 1.0 ) ) * logDepthBufFC - 1.0;\n\t\t\tgl_Position.z *= gl_Position.w;\n\t\t}\n\t#endif\n#endif";

	var map_fragment = "#ifdef USE_MAP\n\tvec4 sampledDiffuseColor = texture2D( map, vUv );\n\t#ifdef DECODE_VIDEO_TEXTURE\n\t\tsampledDiffuseColor = vec4( mix( pow( sampledDiffuseColor.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), sampledDiffuseColor.rgb * 0.0773993808, vec3( lessThanEqual( sampledDiffuseColor.rgb, vec3( 0.04045 ) ) ) ), sampledDiffuseColor.w );\n\t#endif\n\tdiffuseColor *= sampledDiffuseColor;\n#endif";

	var map_pars_fragment = "#ifdef USE_MAP\n\tuniform sampler2D map;\n#endif";

	var map_particle_fragment = "#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\n\tvec2 uv = ( uvTransform * vec3( gl_PointCoord.x, 1.0 - gl_PointCoord.y, 1 ) ).xy;\n#endif\n#ifdef USE_MAP\n\tdiffuseColor *= texture2D( map, uv );\n#endif\n#ifdef USE_ALPHAMAP\n\tdiffuseColor.a *= texture2D( alphaMap, uv ).g;\n#endif";

	var map_particle_pars_fragment = "#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\n\tuniform mat3 uvTransform;\n#endif\n#ifdef USE_MAP\n\tuniform sampler2D map;\n#endif\n#ifdef USE_ALPHAMAP\n\tuniform sampler2D alphaMap;\n#endif";

	var metalnessmap_fragment = "float metalnessFactor = metalness;\n#ifdef USE_METALNESSMAP\n\tvec4 texelMetalness = texture2D( metalnessMap, vUv );\n\tmetalnessFactor *= texelMetalness.b;\n#endif";

	var metalnessmap_pars_fragment = "#ifdef USE_METALNESSMAP\n\tuniform sampler2D metalnessMap;\n#endif";

	var morphcolor_vertex = "#if defined( USE_MORPHCOLORS ) && defined( MORPHTARGETS_TEXTURE )\n\tvColor *= morphTargetBaseInfluence;\n\tfor ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {\n\t\t#if defined( USE_COLOR_ALPHA )\n\t\t\tif ( morphTargetInfluences[ i ] != 0.0 ) vColor += getMorph( gl_VertexID, i, 2 ) * morphTargetInfluences[ i ];\n\t\t#elif defined( USE_COLOR )\n\t\t\tif ( morphTargetInfluences[ i ] != 0.0 ) vColor += getMorph( gl_VertexID, i, 2 ).rgb * morphTargetInfluences[ i ];\n\t\t#endif\n\t}\n#endif";

	var morphnormal_vertex = "#ifdef USE_MORPHNORMALS\n\tobjectNormal *= morphTargetBaseInfluence;\n\t#ifdef MORPHTARGETS_TEXTURE\n\t\tfor ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {\n\t\t\tif ( morphTargetInfluences[ i ] != 0.0 ) objectNormal += getMorph( gl_VertexID, i, 1 ).xyz * morphTargetInfluences[ i ];\n\t\t}\n\t#else\n\t\tobjectNormal += morphNormal0 * morphTargetInfluences[ 0 ];\n\t\tobjectNormal += morphNormal1 * morphTargetInfluences[ 1 ];\n\t\tobjectNormal += morphNormal2 * morphTargetInfluences[ 2 ];\n\t\tobjectNormal += morphNormal3 * morphTargetInfluences[ 3 ];\n\t#endif\n#endif";

	var morphtarget_pars_vertex = "#ifdef USE_MORPHTARGETS\n\tuniform float morphTargetBaseInfluence;\n\t#ifdef MORPHTARGETS_TEXTURE\n\t\tuniform float morphTargetInfluences[ MORPHTARGETS_COUNT ];\n\t\tuniform sampler2DArray morphTargetsTexture;\n\t\tuniform ivec2 morphTargetsTextureSize;\n\t\tvec4 getMorph( const in int vertexIndex, const in int morphTargetIndex, const in int offset ) {\n\t\t\tint texelIndex = vertexIndex * MORPHTARGETS_TEXTURE_STRIDE + offset;\n\t\t\tint y = texelIndex / morphTargetsTextureSize.x;\n\t\t\tint x = texelIndex - y * morphTargetsTextureSize.x;\n\t\t\tivec3 morphUV = ivec3( x, y, morphTargetIndex );\n\t\t\treturn texelFetch( morphTargetsTexture, morphUV, 0 );\n\t\t}\n\t#else\n\t\t#ifndef USE_MORPHNORMALS\n\t\t\tuniform float morphTargetInfluences[ 8 ];\n\t\t#else\n\t\t\tuniform float morphTargetInfluences[ 4 ];\n\t\t#endif\n\t#endif\n#endif";

	var morphtarget_vertex = "#ifdef USE_MORPHTARGETS\n\ttransformed *= morphTargetBaseInfluence;\n\t#ifdef MORPHTARGETS_TEXTURE\n\t\tfor ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {\n\t\t\tif ( morphTargetInfluences[ i ] != 0.0 ) transformed += getMorph( gl_VertexID, i, 0 ).xyz * morphTargetInfluences[ i ];\n\t\t}\n\t#else\n\t\ttransformed += morphTarget0 * morphTargetInfluences[ 0 ];\n\t\ttransformed += morphTarget1 * morphTargetInfluences[ 1 ];\n\t\ttransformed += morphTarget2 * morphTargetInfluences[ 2 ];\n\t\ttransformed += morphTarget3 * morphTargetInfluences[ 3 ];\n\t\t#ifndef USE_MORPHNORMALS\n\t\t\ttransformed += morphTarget4 * morphTargetInfluences[ 4 ];\n\t\t\ttransformed += morphTarget5 * morphTargetInfluences[ 5 ];\n\t\t\ttransformed += morphTarget6 * morphTargetInfluences[ 6 ];\n\t\t\ttransformed += morphTarget7 * morphTargetInfluences[ 7 ];\n\t\t#endif\n\t#endif\n#endif";

	var normal_fragment_begin = "float faceDirection = gl_FrontFacing ? 1.0 : - 1.0;\n#ifdef FLAT_SHADED\n\tvec3 fdx = vec3( dFdx( vViewPosition.x ), dFdx( vViewPosition.y ), dFdx( vViewPosition.z ) );\n\tvec3 fdy = vec3( dFdy( vViewPosition.x ), dFdy( vViewPosition.y ), dFdy( vViewPosition.z ) );\n\tvec3 normal = normalize( cross( fdx, fdy ) );\n#else\n\tvec3 normal = normalize( vNormal );\n\t#ifdef DOUBLE_SIDED\n\t\tnormal = normal * faceDirection;\n\t#endif\n\t#ifdef USE_TANGENT\n\t\tvec3 tangent = normalize( vTangent );\n\t\tvec3 bitangent = normalize( vBitangent );\n\t\t#ifdef DOUBLE_SIDED\n\t\t\ttangent = tangent * faceDirection;\n\t\t\tbitangent = bitangent * faceDirection;\n\t\t#endif\n\t\t#if defined( TANGENTSPACE_NORMALMAP ) || defined( USE_CLEARCOAT_NORMALMAP )\n\t\t\tmat3 vTBN = mat3( tangent, bitangent, normal );\n\t\t#endif\n\t#endif\n#endif\nvec3 geometryNormal = normal;";

	var normal_fragment_maps = "#ifdef OBJECTSPACE_NORMALMAP\n\tnormal = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\n\t#ifdef FLIP_SIDED\n\t\tnormal = - normal;\n\t#endif\n\t#ifdef DOUBLE_SIDED\n\t\tnormal = normal * faceDirection;\n\t#endif\n\tnormal = normalize( normalMatrix * normal );\n#elif defined( TANGENTSPACE_NORMALMAP )\n\tvec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\n\tmapN.xy *= normalScale;\n\t#ifdef USE_TANGENT\n\t\tnormal = normalize( vTBN * mapN );\n\t#else\n\t\tnormal = perturbNormal2Arb( - vViewPosition, normal, mapN, faceDirection );\n\t#endif\n#elif defined( USE_BUMPMAP )\n\tnormal = perturbNormalArb( - vViewPosition, normal, dHdxy_fwd(), faceDirection );\n#endif";

	var normal_pars_fragment = "#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n\t#ifdef USE_TANGENT\n\t\tvarying vec3 vTangent;\n\t\tvarying vec3 vBitangent;\n\t#endif\n#endif";

	var normal_pars_vertex = "#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n\t#ifdef USE_TANGENT\n\t\tvarying vec3 vTangent;\n\t\tvarying vec3 vBitangent;\n\t#endif\n#endif";

	var normal_vertex = "#ifndef FLAT_SHADED\n\tvNormal = normalize( transformedNormal );\n\t#ifdef USE_TANGENT\n\t\tvTangent = normalize( transformedTangent );\n\t\tvBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );\n\t#endif\n#endif";

	var normalmap_pars_fragment = "#ifdef USE_NORMALMAP\n\tuniform sampler2D normalMap;\n\tuniform vec2 normalScale;\n#endif\n#ifdef OBJECTSPACE_NORMALMAP\n\tuniform mat3 normalMatrix;\n#endif\n#if ! defined ( USE_TANGENT ) && ( defined ( TANGENTSPACE_NORMALMAP ) || defined ( USE_CLEARCOAT_NORMALMAP ) )\n\tvec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm, vec3 mapN, float faceDirection ) {\n\t\tvec3 q0 = dFdx( eye_pos.xyz );\n\t\tvec3 q1 = dFdy( eye_pos.xyz );\n\t\tvec2 st0 = dFdx( vUv.st );\n\t\tvec2 st1 = dFdy( vUv.st );\n\t\tvec3 N = surf_norm;\n\t\tvec3 q1perp = cross( q1, N );\n\t\tvec3 q0perp = cross( N, q0 );\n\t\tvec3 T = q1perp * st0.x + q0perp * st1.x;\n\t\tvec3 B = q1perp * st0.y + q0perp * st1.y;\n\t\tfloat det = max( dot( T, T ), dot( B, B ) );\n\t\tfloat scale = ( det == 0.0 ) ? 0.0 : faceDirection * inversesqrt( det );\n\t\treturn normalize( T * ( mapN.x * scale ) + B * ( mapN.y * scale ) + N * mapN.z );\n\t}\n#endif";

	var clearcoat_normal_fragment_begin = "#ifdef USE_CLEARCOAT\n\tvec3 clearcoatNormal = geometryNormal;\n#endif";

	var clearcoat_normal_fragment_maps = "#ifdef USE_CLEARCOAT_NORMALMAP\n\tvec3 clearcoatMapN = texture2D( clearcoatNormalMap, vUv ).xyz * 2.0 - 1.0;\n\tclearcoatMapN.xy *= clearcoatNormalScale;\n\t#ifdef USE_TANGENT\n\t\tclearcoatNormal = normalize( vTBN * clearcoatMapN );\n\t#else\n\t\tclearcoatNormal = perturbNormal2Arb( - vViewPosition, clearcoatNormal, clearcoatMapN, faceDirection );\n\t#endif\n#endif";

	var clearcoat_pars_fragment = "#ifdef USE_CLEARCOATMAP\n\tuniform sampler2D clearcoatMap;\n#endif\n#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n\tuniform sampler2D clearcoatRoughnessMap;\n#endif\n#ifdef USE_CLEARCOAT_NORMALMAP\n\tuniform sampler2D clearcoatNormalMap;\n\tuniform vec2 clearcoatNormalScale;\n#endif";

	var iridescence_pars_fragment = "#ifdef USE_IRIDESCENCEMAP\n\tuniform sampler2D iridescenceMap;\n#endif\n#ifdef USE_IRIDESCENCE_THICKNESSMAP\n\tuniform sampler2D iridescenceThicknessMap;\n#endif";

	var output_fragment = "#ifdef OPAQUE\ndiffuseColor.a = 1.0;\n#endif\n#ifdef USE_TRANSMISSION\ndiffuseColor.a *= transmissionAlpha + 0.1;\n#endif\ngl_FragColor = vec4( outgoingLight, diffuseColor.a );";

	var packing = "vec3 packNormalToRGB( const in vec3 normal ) {\n\treturn normalize( normal ) * 0.5 + 0.5;\n}\nvec3 unpackRGBToNormal( const in vec3 rgb ) {\n\treturn 2.0 * rgb.xyz - 1.0;\n}\nconst float PackUpscale = 256. / 255.;const float UnpackDownscale = 255. / 256.;\nconst vec3 PackFactors = vec3( 256. * 256. * 256., 256. * 256., 256. );\nconst vec4 UnpackFactors = UnpackDownscale / vec4( PackFactors, 1. );\nconst float ShiftRight8 = 1. / 256.;\nvec4 packDepthToRGBA( const in float v ) {\n\tvec4 r = vec4( fract( v * PackFactors ), v );\n\tr.yzw -= r.xyz * ShiftRight8;\treturn r * PackUpscale;\n}\nfloat unpackRGBAToDepth( const in vec4 v ) {\n\treturn dot( v, UnpackFactors );\n}\nvec4 pack2HalfToRGBA( vec2 v ) {\n\tvec4 r = vec4( v.x, fract( v.x * 255.0 ), v.y, fract( v.y * 255.0 ) );\n\treturn vec4( r.x - r.y / 255.0, r.y, r.z - r.w / 255.0, r.w );\n}\nvec2 unpackRGBATo2Half( vec4 v ) {\n\treturn vec2( v.x + ( v.y / 255.0 ), v.z + ( v.w / 255.0 ) );\n}\nfloat viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {\n\treturn ( viewZ + near ) / ( near - far );\n}\nfloat orthographicDepthToViewZ( const in float linearClipZ, const in float near, const in float far ) {\n\treturn linearClipZ * ( near - far ) - near;\n}\nfloat viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {\n\treturn ( ( near + viewZ ) * far ) / ( ( far - near ) * viewZ );\n}\nfloat perspectiveDepthToViewZ( const in float invClipZ, const in float near, const in float far ) {\n\treturn ( near * far ) / ( ( far - near ) * invClipZ - far );\n}";

	var premultiplied_alpha_fragment = "#ifdef PREMULTIPLIED_ALPHA\n\tgl_FragColor.rgb *= gl_FragColor.a;\n#endif";

	var project_vertex = "vec4 mvPosition = vec4( transformed, 1.0 );\n#ifdef USE_INSTANCING\n\tmvPosition = instanceMatrix * mvPosition;\n#endif\nmvPosition = modelViewMatrix * mvPosition;\ngl_Position = projectionMatrix * mvPosition;";

	var dithering_fragment = "#ifdef DITHERING\n\tgl_FragColor.rgb = dithering( gl_FragColor.rgb );\n#endif";

	var dithering_pars_fragment = "#ifdef DITHERING\n\tvec3 dithering( vec3 color ) {\n\t\tfloat grid_position = rand( gl_FragCoord.xy );\n\t\tvec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );\n\t\tdither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );\n\t\treturn color + dither_shift_RGB;\n\t}\n#endif";

	var roughnessmap_fragment = "float roughnessFactor = roughness;\n#ifdef USE_ROUGHNESSMAP\n\tvec4 texelRoughness = texture2D( roughnessMap, vUv );\n\troughnessFactor *= texelRoughness.g;\n#endif";

	var roughnessmap_pars_fragment = "#ifdef USE_ROUGHNESSMAP\n\tuniform sampler2D roughnessMap;\n#endif";

	var shadowmap_pars_fragment = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\t\tuniform sampler2D directionalShadowMap[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tstruct DirectionalLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\t\tuniform sampler2D spotShadowMap[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tstruct SpotLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\t\tuniform sampler2D pointShadowMap[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tstruct PointLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t\tfloat shadowCameraNear;\n\t\t\tfloat shadowCameraFar;\n\t\t};\n\t\tuniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\n\t#endif\n\tfloat texture2DCompare( sampler2D depths, vec2 uv, float compare ) {\n\t\treturn step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );\n\t}\n\tvec2 texture2DDistribution( sampler2D shadow, vec2 uv ) {\n\t\treturn unpackRGBATo2Half( texture2D( shadow, uv ) );\n\t}\n\tfloat VSMShadow (sampler2D shadow, vec2 uv, float compare ){\n\t\tfloat occlusion = 1.0;\n\t\tvec2 distribution = texture2DDistribution( shadow, uv );\n\t\tfloat hard_shadow = step( compare , distribution.x );\n\t\tif (hard_shadow != 1.0 ) {\n\t\t\tfloat distance = compare - distribution.x ;\n\t\t\tfloat variance = max( 0.00000, distribution.y * distribution.y );\n\t\t\tfloat softness_probability = variance / (variance + distance * distance );\t\t\tsoftness_probability = clamp( ( softness_probability - 0.3 ) / ( 0.95 - 0.3 ), 0.0, 1.0 );\t\t\tocclusion = clamp( max( hard_shadow, softness_probability ), 0.0, 1.0 );\n\t\t}\n\t\treturn occlusion;\n\t}\n\tfloat getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord ) {\n\t\tfloat shadow = 1.0;\n\t\tshadowCoord.xyz /= shadowCoord.w;\n\t\tshadowCoord.z += shadowBias;\n\t\tbvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );\n\t\tbool inFrustum = all( inFrustumVec );\n\t\tbvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );\n\t\tbool frustumTest = all( frustumTestVec );\n\t\tif ( frustumTest ) {\n\t\t#if defined( SHADOWMAP_TYPE_PCF )\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n\t\t\tfloat dx0 = - texelSize.x * shadowRadius;\n\t\t\tfloat dy0 = - texelSize.y * shadowRadius;\n\t\t\tfloat dx1 = + texelSize.x * shadowRadius;\n\t\t\tfloat dy1 = + texelSize.y * shadowRadius;\n\t\t\tfloat dx2 = dx0 / 2.0;\n\t\t\tfloat dy2 = dy0 / 2.0;\n\t\t\tfloat dx3 = dx1 / 2.0;\n\t\t\tfloat dy3 = dy1 / 2.0;\n\t\t\tshadow = (\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy2 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy2 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy2 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy3 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy3 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy3 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\n\t\t\t) * ( 1.0 / 17.0 );\n\t\t#elif defined( SHADOWMAP_TYPE_PCF_SOFT )\n\t\t\tvec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n\t\t\tfloat dx = texelSize.x;\n\t\t\tfloat dy = texelSize.y;\n\t\t\tvec2 uv = shadowCoord.xy;\n\t\t\tvec2 f = fract( uv * shadowMapSize + 0.5 );\n\t\t\tuv -= f * texelSize;\n\t\t\tshadow = (\n\t\t\t\ttexture2DCompare( shadowMap, uv, shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, uv + vec2( dx, 0.0 ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, uv + vec2( 0.0, dy ), shadowCoord.z ) +\n\t\t\t\ttexture2DCompare( shadowMap, uv + texelSize, shadowCoord.z ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( -dx, 0.0 ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 0.0 ), shadowCoord.z ),\n\t\t\t\t\t f.x ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( -dx, dy ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, dy ), shadowCoord.z ),\n\t\t\t\t\t f.x ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( 0.0, -dy ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( 0.0, 2.0 * dy ), shadowCoord.z ),\n\t\t\t\t\t f.y ) +\n\t\t\t\tmix( texture2DCompare( shadowMap, uv + vec2( dx, -dy ), shadowCoord.z ), \n\t\t\t\t\t texture2DCompare( shadowMap, uv + vec2( dx, 2.0 * dy ), shadowCoord.z ),\n\t\t\t\t\t f.y ) +\n\t\t\t\tmix( mix( texture2DCompare( shadowMap, uv + vec2( -dx, -dy ), shadowCoord.z ), \n\t\t\t\t\t\t	texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, -dy ), shadowCoord.z ),\n\t\t\t\t\t\t	f.x ),\n\t\t\t\t\t mix( texture2DCompare( shadowMap, uv + vec2( -dx, 2.0 * dy ), shadowCoord.z ), \n\t\t\t\t\t\t	texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 2.0 * dy ), shadowCoord.z ),\n\t\t\t\t\t\t	f.x ),\n\t\t\t\t\t f.y )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#elif defined( SHADOWMAP_TYPE_VSM )\n\t\t\tshadow = VSMShadow( shadowMap, shadowCoord.xy, shadowCoord.z );\n\t\t#else\n\t\t\tshadow = texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );\n\t\t#endif\n\t\t}\n\t\treturn shadow;\n\t}\n\tvec2 cubeToUV( vec3 v, float texelSizeY ) {\n\t\tvec3 absV = abs( v );\n\t\tfloat scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );\n\t\tabsV *= scaleToCube;\n\t\tv *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );\n\t\tvec2 planar = v.xy;\n\t\tfloat almostATexel = 1.5 * texelSizeY;\n\t\tfloat almostOne = 1.0 - almostATexel;\n\t\tif ( absV.z >= almostOne ) {\n\t\t\tif ( v.z > 0.0 )\n\t\t\t\tplanar.x = 4.0 - v.x;\n\t\t} else if ( absV.x >= almostOne ) {\n\t\t\tfloat signX = sign( v.x );\n\t\t\tplanar.x = v.z * signX + 2.0 * signX;\n\t\t} else if ( absV.y >= almostOne ) {\n\t\t\tfloat signY = sign( v.y );\n\t\t\tplanar.x = v.x + 2.0 * signY + 2.0;\n\t\t\tplanar.y = v.z * signY - 2.0;\n\t\t}\n\t\treturn vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );\n\t}\n\tfloat getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowBias, float shadowRadius, vec4 shadowCoord, float shadowCameraNear, float shadowCameraFar ) {\n\t\tvec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );\n\t\tvec3 lightToPosition = shadowCoord.xyz;\n\t\tfloat dp = ( length( lightToPosition ) - shadowCameraNear ) / ( shadowCameraFar - shadowCameraNear );\t\tdp += shadowBias;\n\t\tvec3 bd3D = normalize( lightToPosition );\n\t\t#if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT ) || defined( SHADOWMAP_TYPE_VSM )\n\t\t\tvec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;\n\t\t\treturn (\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +\n\t\t\t\ttexture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )\n\t\t\t) * ( 1.0 / 9.0 );\n\t\t#else\n\t\t\treturn texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );\n\t\t#endif\n\t}\n#endif";

	var shadowmap_pars_vertex = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\t\tuniform mat4 directionalShadowMatrix[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tvarying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\n\t\tstruct DirectionalLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\t\tuniform mat4 spotShadowMatrix[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vSpotShadowCoord[ NUM_SPOT_LIGHT_SHADOWS ];\n\t\tstruct SpotLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t};\n\t\tuniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\t\tuniform mat4 pointShadowMatrix[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tvarying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\n\t\tstruct PointLightShadow {\n\t\t\tfloat shadowBias;\n\t\t\tfloat shadowNormalBias;\n\t\t\tfloat shadowRadius;\n\t\t\tvec2 shadowMapSize;\n\t\t\tfloat shadowCameraNear;\n\t\t\tfloat shadowCameraFar;\n\t\t};\n\t\tuniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\n\t#endif\n#endif";

	var shadowmap_vertex = "#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0 || NUM_SPOT_LIGHT_SHADOWS > 0 || NUM_POINT_LIGHT_SHADOWS > 0\n\t\tvec3 shadowWorldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n\t\tvec4 shadowWorldPosition;\n\t#endif\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\n\t\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * directionalLightShadows[ i ].shadowNormalBias, 0 );\n\t\tvDirectionalShadowCoord[ i ] = directionalShadowMatrix[ i ] * shadowWorldPosition;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\n\t\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * spotLightShadows[ i ].shadowNormalBias, 0 );\n\t\tvSpotShadowCoord[ i ] = spotShadowMatrix[ i ] * shadowWorldPosition;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\n\t\tshadowWorldPosition = worldPosition + vec4( shadowWorldNormal * pointLightShadows[ i ].shadowNormalBias, 0 );\n\t\tvPointShadowCoord[ i ] = pointShadowMatrix[ i ] * shadowWorldPosition;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n#endif";

	var shadowmask_pars_fragment = "float getShadowMask() {\n\tfloat shadow = 1.0;\n\t#ifdef USE_SHADOWMAP\n\t#if NUM_DIR_LIGHT_SHADOWS > 0\n\tDirectionalLightShadow directionalLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\n\t\tdirectionalLight = directionalLightShadows[ i ];\n\t\tshadow *= receiveShadow ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_SPOT_LIGHT_SHADOWS > 0\n\tSpotLightShadow spotLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\n\t\tspotLight = spotLightShadows[ i ];\n\t\tshadow *= receiveShadow ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowBias, spotLight.shadowRadius, vSpotShadowCoord[ i ] ) : 1.0;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#if NUM_POINT_LIGHT_SHADOWS > 0\n\tPointLightShadow pointLight;\n\t#pragma unroll_loop_start\n\tfor ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\n\t\tpointLight = pointLightShadows[ i ];\n\t\tshadow *= receiveShadow ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ], pointLight.shadowCameraNear, pointLight.shadowCameraFar ) : 1.0;\n\t}\n\t#pragma unroll_loop_end\n\t#endif\n\t#endif\n\treturn shadow;\n}";

	var skinbase_vertex = "#ifdef USE_SKINNING\n\tmat4 boneMatX = getBoneMatrix( skinIndex.x );\n\tmat4 boneMatY = getBoneMatrix( skinIndex.y );\n\tmat4 boneMatZ = getBoneMatrix( skinIndex.z );\n\tmat4 boneMatW = getBoneMatrix( skinIndex.w );\n#endif";

	var skinning_pars_vertex = "#ifdef USE_SKINNING\n\tuniform mat4 bindMatrix;\n\tuniform mat4 bindMatrixInverse;\n\tuniform highp sampler2D boneTexture;\n\tuniform int boneTextureSize;\n\tmat4 getBoneMatrix( const in float i ) {\n\t\tfloat j = i * 4.0;\n\t\tfloat x = mod( j, float( boneTextureSize ) );\n\t\tfloat y = floor( j / float( boneTextureSize ) );\n\t\tfloat dx = 1.0 / float( boneTextureSize );\n\t\tfloat dy = 1.0 / float( boneTextureSize );\n\t\ty = dy * ( y + 0.5 );\n\t\tvec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );\n\t\tvec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );\n\t\tvec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );\n\t\tvec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );\n\t\tmat4 bone = mat4( v1, v2, v3, v4 );\n\t\treturn bone;\n\t}\n#endif";

	var skinning_vertex = "#ifdef USE_SKINNING\n\tvec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );\n\tvec4 skinned = vec4( 0.0 );\n\tskinned += boneMatX * skinVertex * skinWeight.x;\n\tskinned += boneMatY * skinVertex * skinWeight.y;\n\tskinned += boneMatZ * skinVertex * skinWeight.z;\n\tskinned += boneMatW * skinVertex * skinWeight.w;\n\ttransformed = ( bindMatrixInverse * skinned ).xyz;\n#endif";

	var skinnormal_vertex = "#ifdef USE_SKINNING\n\tmat4 skinMatrix = mat4( 0.0 );\n\tskinMatrix += skinWeight.x * boneMatX;\n\tskinMatrix += skinWeight.y * boneMatY;\n\tskinMatrix += skinWeight.z * boneMatZ;\n\tskinMatrix += skinWeight.w * boneMatW;\n\tskinMatrix = bindMatrixInverse * skinMatrix * bindMatrix;\n\tobjectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;\n\t#ifdef USE_TANGENT\n\t\tobjectTangent = vec4( skinMatrix * vec4( objectTangent, 0.0 ) ).xyz;\n\t#endif\n#endif";

	var specularmap_fragment = "float specularStrength;\n#ifdef USE_SPECULARMAP\n\tvec4 texelSpecular = texture2D( specularMap, vUv );\n\tspecularStrength = texelSpecular.r;\n#else\n\tspecularStrength = 1.0;\n#endif";

	var specularmap_pars_fragment = "#ifdef USE_SPECULARMAP\n\tuniform sampler2D specularMap;\n#endif";

	var tonemapping_fragment = "#if defined( TONE_MAPPING )\n\tgl_FragColor.rgb = toneMapping( gl_FragColor.rgb );\n#endif";

	var tonemapping_pars_fragment = "#ifndef saturate\n#define saturate( a ) clamp( a, 0.0, 1.0 )\n#endif\nuniform float toneMappingExposure;\nvec3 LinearToneMapping( vec3 color ) {\n\treturn toneMappingExposure * color;\n}\nvec3 ReinhardToneMapping( vec3 color ) {\n\tcolor *= toneMappingExposure;\n\treturn saturate( color / ( vec3( 1.0 ) + color ) );\n}\nvec3 OptimizedCineonToneMapping( vec3 color ) {\n\tcolor *= toneMappingExposure;\n\tcolor = max( vec3( 0.0 ), color - 0.004 );\n\treturn pow( ( color * ( 6.2 * color + 0.5 ) ) / ( color * ( 6.2 * color + 1.7 ) + 0.06 ), vec3( 2.2 ) );\n}\nvec3 RRTAndODTFit( vec3 v ) {\n\tvec3 a = v * ( v + 0.0245786 ) - 0.000090537;\n\tvec3 b = v * ( 0.983729 * v + 0.4329510 ) + 0.238081;\n\treturn a / b;\n}\nvec3 ACESFilmicToneMapping( vec3 color ) {\n\tconst mat3 ACESInputMat = mat3(\n\t\tvec3( 0.59719, 0.07600, 0.02840 ),\t\tvec3( 0.35458, 0.90834, 0.13383 ),\n\t\tvec3( 0.04823, 0.01566, 0.83777 )\n\t);\n\tconst mat3 ACESOutputMat = mat3(\n\t\tvec3(	1.60475, -0.10208, -0.00327 ),\t\tvec3( -0.53108,	1.10813, -0.07276 ),\n\t\tvec3( -0.07367, -0.00605,	1.07602 )\n\t);\n\tcolor *= toneMappingExposure / 0.6;\n\tcolor = ACESInputMat * color;\n\tcolor = RRTAndODTFit( color );\n\tcolor = ACESOutputMat * color;\n\treturn saturate( color );\n}\nvec3 CustomToneMapping( vec3 color ) { return color; }";

	var transmission_fragment = "#ifdef USE_TRANSMISSION\n\tfloat transmissionAlpha = 1.0;\n\tfloat transmissionFactor = transmission;\n\tfloat thicknessFactor = thickness;\n\t#ifdef USE_TRANSMISSIONMAP\n\t\ttransmissionFactor *= texture2D( transmissionMap, vUv ).r;\n\t#endif\n\t#ifdef USE_THICKNESSMAP\n\t\tthicknessFactor *= texture2D( thicknessMap, vUv ).g;\n\t#endif\n\tvec3 pos = vWorldPosition;\n\tvec3 v = normalize( cameraPosition - pos );\n\tvec3 n = inverseTransformDirection( normal, viewMatrix );\n\tvec4 transmission = getIBLVolumeRefraction(\n\t\tn, v, roughnessFactor, material.diffuseColor, material.specularColor, material.specularF90,\n\t\tpos, modelMatrix, viewMatrix, projectionMatrix, ior, thicknessFactor,\n\t\tattenuationColor, attenuationDistance );\n\ttotalDiffuse = mix( totalDiffuse, transmission.rgb, transmissionFactor );\n\ttransmissionAlpha = mix( transmissionAlpha, transmission.a, transmissionFactor );\n#endif";

	var transmission_pars_fragment = "#ifdef USE_TRANSMISSION\n\tuniform float transmission;\n\tuniform float thickness;\n\tuniform float attenuationDistance;\n\tuniform vec3 attenuationColor;\n\t#ifdef USE_TRANSMISSIONMAP\n\t\tuniform sampler2D transmissionMap;\n\t#endif\n\t#ifdef USE_THICKNESSMAP\n\t\tuniform sampler2D thicknessMap;\n\t#endif\n\tuniform vec2 transmissionSamplerSize;\n\tuniform sampler2D transmissionSamplerMap;\n\tuniform mat4 modelMatrix;\n\tuniform mat4 projectionMatrix;\n\tvarying vec3 vWorldPosition;\n\tvec3 getVolumeTransmissionRay( const in vec3 n, const in vec3 v, const in float thickness, const in float ior, const in mat4 modelMatrix ) {\n\t\tvec3 refractionVector = refract( - v, normalize( n ), 1.0 / ior );\n\t\tvec3 modelScale;\n\t\tmodelScale.x = length( vec3( modelMatrix[ 0 ].xyz ) );\n\t\tmodelScale.y = length( vec3( modelMatrix[ 1 ].xyz ) );\n\t\tmodelScale.z = length( vec3( modelMatrix[ 2 ].xyz ) );\n\t\treturn normalize( refractionVector ) * thickness * modelScale;\n\t}\n\tfloat applyIorToRoughness( const in float roughness, const in float ior ) {\n\t\treturn roughness * clamp( ior * 2.0 - 2.0, 0.0, 1.0 );\n\t}\n\tvec4 getTransmissionSample( const in vec2 fragCoord, const in float roughness, const in float ior ) {\n\t\tfloat framebufferLod = log2( transmissionSamplerSize.x ) * applyIorToRoughness( roughness, ior );\n\t\t#ifdef texture2DLodEXT\n\t\t\treturn texture2DLodEXT( transmissionSamplerMap, fragCoord.xy, framebufferLod );\n\t\t#else\n\t\t\treturn texture2D( transmissionSamplerMap, fragCoord.xy, framebufferLod );\n\t\t#endif\n\t}\n\tvec3 applyVolumeAttenuation( const in vec3 radiance, const in float transmissionDistance, const in vec3 attenuationColor, const in float attenuationDistance ) {\n\t\tif ( attenuationDistance == 0.0 ) {\n\t\t\treturn radiance;\n\t\t} else {\n\t\t\tvec3 attenuationCoefficient = -log( attenuationColor ) / attenuationDistance;\n\t\t\tvec3 transmittance = exp( - attenuationCoefficient * transmissionDistance );\t\t\treturn transmittance * radiance;\n\t\t}\n\t}\n\tvec4 getIBLVolumeRefraction( const in vec3 n, const in vec3 v, const in float roughness, const in vec3 diffuseColor,\n\t\tconst in vec3 specularColor, const in float specularF90, const in vec3 position, const in mat4 modelMatrix,\n\t\tconst in mat4 viewMatrix, const in mat4 projMatrix, const in float ior, const in float thickness,\n\t\tconst in vec3 attenuationColor, const in float attenuationDistance ) {\n\t\tvec3 transmissionRay = getVolumeTransmissionRay( n, v, thickness, ior, modelMatrix );\n\t\tvec3 refractedRayExit = position + transmissionRay;\n\t\tvec4 ndcPos = projMatrix * viewMatrix * vec4( refractedRayExit, 1.0 );\n\t\tvec2 refractionCoords = ndcPos.xy / ndcPos.w;\n\t\trefractionCoords += 1.0;\n\t\trefractionCoords /= 2.0;\n\t\tvec4 transmittedLight = getTransmissionSample( refractionCoords, roughness, ior );\n\t\tvec3 attenuatedColor = applyVolumeAttenuation( transmittedLight.rgb, length( transmissionRay ), attenuationColor, attenuationDistance );\n\t\tvec3 F = EnvironmentBRDF( n, v, specularColor, specularF90, roughness );\n\t\treturn vec4( ( 1.0 - F ) * attenuatedColor * diffuseColor, transmittedLight.a );\n\t}\n#endif";

	var uv_pars_fragment = "#if ( defined( USE_UV ) && ! defined( UVS_VERTEX_ONLY ) )\n\tvarying vec2 vUv;\n#endif";

	var uv_pars_vertex = "#ifdef USE_UV\n\t#ifdef UVS_VERTEX_ONLY\n\t\tvec2 vUv;\n\t#else\n\t\tvarying vec2 vUv;\n\t#endif\n\tuniform mat3 uvTransform;\n#endif";

	var uv_vertex = "#ifdef USE_UV\n\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\n#endif";

	var uv2_pars_fragment = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tvarying vec2 vUv2;\n#endif";

	var uv2_pars_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tattribute vec2 uv2;\n\tvarying vec2 vUv2;\n\tuniform mat3 uv2Transform;\n#endif";

	var uv2_vertex = "#if defined( USE_LIGHTMAP ) || defined( USE_AOMAP )\n\tvUv2 = ( uv2Transform * vec3( uv2, 1 ) ).xy;\n#endif";

	var worldpos_vertex = "#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP ) || defined ( USE_TRANSMISSION )\n\tvec4 worldPosition = vec4( transformed, 1.0 );\n\t#ifdef USE_INSTANCING\n\t\tworldPosition = instanceMatrix * worldPosition;\n\t#endif\n\tworldPosition = modelMatrix * worldPosition;\n#endif";

	const vertex$g = "varying vec2 vUv;\nuniform mat3 uvTransform;\nvoid main() {\n\tvUv = ( uvTransform * vec3( uv, 1 ) ).xy;\n\tgl_Position = vec4( position.xy, 1.0, 1.0 );\n}";
	const fragment$g = "uniform sampler2D t2D;\nvarying vec2 vUv;\nvoid main() {\n\tgl_FragColor = texture2D( t2D, vUv );\n\t#ifdef DECODE_VIDEO_TEXTURE\n\t\tgl_FragColor = vec4( mix( pow( gl_FragColor.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), gl_FragColor.rgb * 0.0773993808, vec3( lessThanEqual( gl_FragColor.rgb, vec3( 0.04045 ) ) ) ), gl_FragColor.w );\n\t#endif\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n}";

	const vertex$f = "varying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n\tvWorldDirection = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n\tgl_Position.z = gl_Position.w;\n}";
	const fragment$f = "#include <envmap_common_pars_fragment>\nuniform float opacity;\nvarying vec3 vWorldDirection;\n#include <cube_uv_reflection_fragment>\nvoid main() {\n\tvec3 vReflect = vWorldDirection;\n\t#include <envmap_fragment>\n\tgl_FragColor = envColor;\n\tgl_FragColor.a *= opacity;\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n}";

	const vertex$e = "#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvarying vec2 vHighPrecisionZW;\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvHighPrecisionZW = gl_Position.zw;\n}";
	const fragment$e = "#if DEPTH_PACKING == 3200\n\tuniform float opacity;\n#endif\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvarying vec2 vHighPrecisionZW;\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( 1.0 );\n\t#if DEPTH_PACKING == 3200\n\t\tdiffuseColor.a = opacity;\n\t#endif\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <logdepthbuf_fragment>\n\tfloat fragCoordZ = 0.5 * vHighPrecisionZW[0] / vHighPrecisionZW[1] + 0.5;\n\t#if DEPTH_PACKING == 3200\n\t\tgl_FragColor = vec4( vec3( 1.0 - fragCoordZ ), opacity );\n\t#elif DEPTH_PACKING == 3201\n\t\tgl_FragColor = packDepthToRGBA( fragCoordZ );\n\t#endif\n}";

	const vertex$d = "#define DISTANCE\nvarying vec3 vWorldPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <skinbase_vertex>\n\t#ifdef USE_DISPLACEMENTMAP\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <clipping_planes_vertex>\n\tvWorldPosition = worldPosition.xyz;\n}";
	const fragment$d = "#define DISTANCE\nuniform vec3 referencePosition;\nuniform float nearDistance;\nuniform float farDistance;\nvarying vec3 vWorldPosition;\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main () {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( 1.0 );\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\tfloat dist = length( vWorldPosition - referencePosition );\n\tdist = ( dist - nearDistance ) / ( farDistance - nearDistance );\n\tdist = saturate( dist );\n\tgl_FragColor = packDepthToRGBA( dist );\n}";

	const vertex$c = "varying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n\tvWorldDirection = transformDirection( position, modelMatrix );\n\t#include <begin_vertex>\n\t#include <project_vertex>\n}";
	const fragment$c = "uniform sampler2D tEquirect;\nvarying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n\tvec3 direction = normalize( vWorldDirection );\n\tvec2 sampleUV = equirectUv( direction );\n\tgl_FragColor = texture2D( tEquirect, sampleUV );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n}";

	const vertex$b = "uniform float scale;\nattribute float lineDistance;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\tvLineDistance = scale * lineDistance;\n\t#include <color_vertex>\n\t#include <morphcolor_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <fog_vertex>\n}";
	const fragment$b = "uniform vec3 diffuse;\nuniform float opacity;\nuniform float dashSize;\nuniform float totalSize;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tif ( mod( vLineDistance, totalSize ) > dashSize ) {\n\t\tdiscard;\n\t}\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <color_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\t#include <output_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n}";

	const vertex$a = "#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <morphcolor_vertex>\n\t#if defined ( USE_ENVMAP ) || defined ( USE_SKINNING )\n\t\t#include <beginnormal_vertex>\n\t\t#include <morphnormal_vertex>\n\t\t#include <skinbase_vertex>\n\t\t#include <skinnormal_vertex>\n\t\t#include <defaultnormal_vertex>\n\t#endif\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <worldpos_vertex>\n\t#include <envmap_vertex>\n\t#include <fog_vertex>\n}";
	const fragment$a = "uniform vec3 diffuse;\nuniform float opacity;\n#ifndef FLAT_SHADED\n\tvarying vec3 vNormal;\n#endif\n#include <common>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <fog_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\t#ifdef USE_LIGHTMAP\n\t\tvec4 lightMapTexel = texture2D( lightMap, vUv2 );\n\t\treflectedLight.indirectDiffuse += lightMapTexel.rgb * lightMapIntensity * RECIPROCAL_PI;\n\t#else\n\t\treflectedLight.indirectDiffuse += vec3( 1.0 );\n\t#endif\n\t#include <aomap_fragment>\n\treflectedLight.indirectDiffuse *= diffuseColor.rgb;\n\tvec3 outgoingLight = reflectedLight.indirectDiffuse;\n\t#include <envmap_fragment>\n\t#include <output_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	const vertex$9 = "#define LAMBERT\nvarying vec3 vLightFront;\nvarying vec3 vIndirectFront;\n#ifdef DOUBLE_SIDED\n\tvarying vec3 vLightBack;\n\tvarying vec3 vIndirectBack;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <envmap_pars_vertex>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <morphcolor_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <worldpos_vertex>\n\t#include <envmap_vertex>\n\t#include <lights_lambert_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";
	const fragment$9 = "uniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\nvarying vec3 vLightFront;\nvarying vec3 vIndirectFront;\n#ifdef DOUBLE_SIDED\n\tvarying vec3 vLightBack;\n\tvarying vec3 vIndirectBack;\n#endif\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <fog_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\t#include <emissivemap_fragment>\n\t#ifdef DOUBLE_SIDED\n\t\treflectedLight.indirectDiffuse += ( gl_FrontFacing ) ? vIndirectFront : vIndirectBack;\n\t#else\n\t\treflectedLight.indirectDiffuse += vIndirectFront;\n\t#endif\n\t#include <lightmap_fragment>\n\treflectedLight.indirectDiffuse *= BRDF_Lambert( diffuseColor.rgb );\n\t#ifdef DOUBLE_SIDED\n\t\treflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;\n\t#else\n\t\treflectedLight.directDiffuse = vLightFront;\n\t#endif\n\treflectedLight.directDiffuse *= BRDF_Lambert( diffuseColor.rgb ) * getShadowMask();\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n\t#include <envmap_fragment>\n\t#include <output_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	const vertex$8 = "#define MATCAP\nvarying vec3 vViewPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <color_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <color_vertex>\n\t#include <morphcolor_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <normal_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <fog_vertex>\n\tvViewPosition = - mvPosition.xyz;\n}";
	const fragment$8 = "#define MATCAP\nuniform vec3 diffuse;\nuniform float opacity;\nuniform sampler2D matcap;\nvarying vec3 vViewPosition;\n#include <common>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <fog_pars_fragment>\n#include <normal_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\tvec3 viewDir = normalize( vViewPosition );\n\tvec3 x = normalize( vec3( viewDir.z, 0.0, - viewDir.x ) );\n\tvec3 y = cross( viewDir, x );\n\tvec2 uv = vec2( dot( x, normal ), dot( y, normal ) ) * 0.495 + 0.5;\n\t#ifdef USE_MATCAP\n\t\tvec4 matcapColor = texture2D( matcap, uv );\n\t#else\n\t\tvec4 matcapColor = vec4( vec3( mix( 0.2, 0.8, uv.y ) ), 1.0 );\n\t#endif\n\tvec3 outgoingLight = diffuseColor.rgb * matcapColor.rgb;\n\t#include <output_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	const vertex$7 = "#define NORMAL\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n\tvarying vec3 vViewPosition;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <normal_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n\tvViewPosition = - mvPosition.xyz;\n#endif\n}";
	const fragment$7 = "#define NORMAL\nuniform float opacity;\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( TANGENTSPACE_NORMALMAP )\n\tvarying vec3 vViewPosition;\n#endif\n#include <packing>\n#include <uv_pars_fragment>\n#include <normal_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\t#include <logdepthbuf_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\tgl_FragColor = vec4( packNormalToRGB( normal ), opacity );\n\t#ifdef OPAQUE\n\t\tgl_FragColor.a = 1.0;\n\t#endif\n}";

	const vertex$6 = "#define PHONG\nvarying vec3 vViewPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <morphcolor_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <normal_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <envmap_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";
	const fragment$6 = "#define PHONG\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform vec3 specular;\nuniform float shininess;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <cube_uv_reflection_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <normal_pars_fragment>\n#include <lights_phong_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <specularmap_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\t#include <emissivemap_fragment>\n\t#include <lights_phong_fragment>\n\t#include <lights_fragment_begin>\n\t#include <lights_fragment_maps>\n\t#include <lights_fragment_end>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\n\t#include <envmap_fragment>\n\t#include <output_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	const vertex$5 = "#define STANDARD\nvarying vec3 vViewPosition;\n#ifdef USE_TRANSMISSION\n\tvarying vec3 vWorldPosition;\n#endif\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <morphcolor_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <normal_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n#ifdef USE_TRANSMISSION\n\tvWorldPosition = worldPosition.xyz;\n#endif\n}";
	const fragment$5 = "#define STANDARD\n#ifdef PHYSICAL\n\t#define IOR\n\t#define SPECULAR\n#endif\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float roughness;\nuniform float metalness;\nuniform float opacity;\n#ifdef IOR\n\tuniform float ior;\n#endif\n#ifdef SPECULAR\n\tuniform float specularIntensity;\n\tuniform vec3 specularColor;\n\t#ifdef USE_SPECULARINTENSITYMAP\n\t\tuniform sampler2D specularIntensityMap;\n\t#endif\n\t#ifdef USE_SPECULARCOLORMAP\n\t\tuniform sampler2D specularColorMap;\n\t#endif\n#endif\n#ifdef USE_CLEARCOAT\n\tuniform float clearcoat;\n\tuniform float clearcoatRoughness;\n#endif\n#ifdef USE_IRIDESCENCE\n\tuniform float iridescence;\n\tuniform float iridescenceIOR;\n\tuniform float iridescenceThicknessMinimum;\n\tuniform float iridescenceThicknessMaximum;\n#endif\n#ifdef USE_SHEEN\n\tuniform vec3 sheenColor;\n\tuniform float sheenRoughness;\n\t#ifdef USE_SHEENCOLORMAP\n\t\tuniform sampler2D sheenColorMap;\n\t#endif\n\t#ifdef USE_SHEENROUGHNESSMAP\n\t\tuniform sampler2D sheenRoughnessMap;\n\t#endif\n#endif\nvarying vec3 vViewPosition;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <bsdfs>\n#include <iridescence_fragment>\n#include <cube_uv_reflection_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_physical_pars_fragment>\n#include <fog_pars_fragment>\n#include <lights_pars_begin>\n#include <normal_pars_fragment>\n#include <lights_physical_pars_fragment>\n#include <transmission_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <clearcoat_pars_fragment>\n#include <iridescence_pars_fragment>\n#include <roughnessmap_pars_fragment>\n#include <metalnessmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <roughnessmap_fragment>\n\t#include <metalnessmap_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\t#include <clearcoat_normal_fragment_begin>\n\t#include <clearcoat_normal_fragment_maps>\n\t#include <emissivemap_fragment>\n\t#include <lights_physical_fragment>\n\t#include <lights_fragment_begin>\n\t#include <lights_fragment_maps>\n\t#include <lights_fragment_end>\n\t#include <aomap_fragment>\n\tvec3 totalDiffuse = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse;\n\tvec3 totalSpecular = reflectedLight.directSpecular + reflectedLight.indirectSpecular;\n\t#include <transmission_fragment>\n\tvec3 outgoingLight = totalDiffuse + totalSpecular + totalEmissiveRadiance;\n\t#ifdef USE_SHEEN\n\t\tfloat sheenEnergyComp = 1.0 - 0.157 * max3( material.sheenColor );\n\t\toutgoingLight = outgoingLight * sheenEnergyComp + sheenSpecular;\n\t#endif\n\t#ifdef USE_CLEARCOAT\n\t\tfloat dotNVcc = saturate( dot( geometry.clearcoatNormal, geometry.viewDir ) );\n\t\tvec3 Fcc = F_Schlick( material.clearcoatF0, material.clearcoatF90, dotNVcc );\n\t\toutgoingLight = outgoingLight * ( 1.0 - material.clearcoat * Fcc ) + clearcoatSpecular * material.clearcoat;\n\t#endif\n\t#include <output_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	const vertex$4 = "#define TOON\nvarying vec3 vViewPosition;\n#include <common>\n#include <uv_pars_vertex>\n#include <uv2_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\t#include <uv2_vertex>\n\t#include <color_vertex>\n\t#include <morphcolor_vertex>\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <normal_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <displacementmap_vertex>\n\t#include <project_vertex>\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\tvViewPosition = - mvPosition.xyz;\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";
	const fragment$4 = "#define TOON\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <uv2_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <gradientmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <normal_pars_fragment>\n#include <lights_toon_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\tReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n\tvec3 totalEmissiveRadiance = emissive;\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <color_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\t#include <normal_fragment_begin>\n\t#include <normal_fragment_maps>\n\t#include <emissivemap_fragment>\n\t#include <lights_toon_fragment>\n\t#include <lights_fragment_begin>\n\t#include <lights_fragment_maps>\n\t#include <lights_fragment_end>\n\t#include <aomap_fragment>\n\tvec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n\t#include <output_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n\t#include <dithering_fragment>\n}";

	const vertex$3 = "uniform float size;\nuniform float scale;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <color_vertex>\n\t#include <morphcolor_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <project_vertex>\n\tgl_PointSize = size;\n\t#ifdef USE_SIZEATTENUATION\n\t\tbool isPerspective = isPerspectiveMatrix( projectionMatrix );\n\t\tif ( isPerspective ) gl_PointSize *= ( scale / - mvPosition.z );\n\t#endif\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <worldpos_vertex>\n\t#include <fog_vertex>\n}";
	const fragment$3 = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <color_pars_fragment>\n#include <map_particle_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_particle_fragment>\n\t#include <color_fragment>\n\t#include <alphatest_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\t#include <output_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n\t#include <premultiplied_alpha_fragment>\n}";

	const vertex$2 = "#include <common>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\nvoid main() {\n\t#include <beginnormal_vertex>\n\t#include <morphnormal_vertex>\n\t#include <skinbase_vertex>\n\t#include <skinnormal_vertex>\n\t#include <defaultnormal_vertex>\n\t#include <begin_vertex>\n\t#include <morphtarget_vertex>\n\t#include <skinning_vertex>\n\t#include <project_vertex>\n\t#include <worldpos_vertex>\n\t#include <shadowmap_vertex>\n\t#include <fog_vertex>\n}";
	const fragment$2 = "uniform vec3 color;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\nvoid main() {\n\tgl_FragColor = vec4( color, opacity * ( 1.0 - getShadowMask() ) );\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}";

	const vertex$1 = "uniform float rotation;\nuniform vec2 center;\n#include <common>\n#include <uv_pars_vertex>\n#include <fog_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n\t#include <uv_vertex>\n\tvec4 mvPosition = modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );\n\tvec2 scale;\n\tscale.x = length( vec3( modelMatrix[ 0 ].x, modelMatrix[ 0 ].y, modelMatrix[ 0 ].z ) );\n\tscale.y = length( vec3( modelMatrix[ 1 ].x, modelMatrix[ 1 ].y, modelMatrix[ 1 ].z ) );\n\t#ifndef USE_SIZEATTENUATION\n\t\tbool isPerspective = isPerspectiveMatrix( projectionMatrix );\n\t\tif ( isPerspective ) scale *= - mvPosition.z;\n\t#endif\n\tvec2 alignedPosition = ( position.xy - ( center - vec2( 0.5 ) ) ) * scale;\n\tvec2 rotatedPosition;\n\trotatedPosition.x = cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y;\n\trotatedPosition.y = sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y;\n\tmvPosition.xy += rotatedPosition;\n\tgl_Position = projectionMatrix * mvPosition;\n\t#include <logdepthbuf_vertex>\n\t#include <clipping_planes_vertex>\n\t#include <fog_vertex>\n}";
	const fragment$1 = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n\t#include <clipping_planes_fragment>\n\tvec3 outgoingLight = vec3( 0.0 );\n\tvec4 diffuseColor = vec4( diffuse, opacity );\n\t#include <logdepthbuf_fragment>\n\t#include <map_fragment>\n\t#include <alphamap_fragment>\n\t#include <alphatest_fragment>\n\toutgoingLight = diffuseColor.rgb;\n\t#include <output_fragment>\n\t#include <tonemapping_fragment>\n\t#include <encodings_fragment>\n\t#include <fog_fragment>\n}";

	const ShaderChunk = {
		alphamap_fragment: alphamap_fragment,
		alphamap_pars_fragment: alphamap_pars_fragment,
		alphatest_fragment: alphatest_fragment,
		alphatest_pars_fragment: alphatest_pars_fragment,
		aomap_fragment: aomap_fragment,
		aomap_pars_fragment: aomap_pars_fragment,
		begin_vertex: begin_vertex,
		beginnormal_vertex: beginnormal_vertex,
		bsdfs: bsdfs,
		iridescence_fragment: iridescence_fragment,
		bumpmap_pars_fragment: bumpmap_pars_fragment,
		clipping_planes_fragment: clipping_planes_fragment,
		clipping_planes_pars_fragment: clipping_planes_pars_fragment,
		clipping_planes_pars_vertex: clipping_planes_pars_vertex,
		clipping_planes_vertex: clipping_planes_vertex,
		color_fragment: color_fragment,
		color_pars_fragment: color_pars_fragment,
		color_pars_vertex: color_pars_vertex,
		color_vertex: color_vertex,
		common: common,
		cube_uv_reflection_fragment: cube_uv_reflection_fragment,
		defaultnormal_vertex: defaultnormal_vertex,
		displacementmap_pars_vertex: displacementmap_pars_vertex,
		displacementmap_vertex: displacementmap_vertex,
		emissivemap_fragment: emissivemap_fragment,
		emissivemap_pars_fragment: emissivemap_pars_fragment,
		encodings_fragment: encodings_fragment,
		encodings_pars_fragment: encodings_pars_fragment,
		envmap_fragment: envmap_fragment,
		envmap_common_pars_fragment: envmap_common_pars_fragment,
		envmap_pars_fragment: envmap_pars_fragment,
		envmap_pars_vertex: envmap_pars_vertex,
		envmap_physical_pars_fragment: envmap_physical_pars_fragment,
		envmap_vertex: envmap_vertex,
		fog_vertex: fog_vertex,
		fog_pars_vertex: fog_pars_vertex,
		fog_fragment: fog_fragment,
		fog_pars_fragment: fog_pars_fragment,
		gradientmap_pars_fragment: gradientmap_pars_fragment,
		lightmap_fragment: lightmap_fragment,
		lightmap_pars_fragment: lightmap_pars_fragment,
		lights_lambert_vertex: lights_lambert_vertex,
		lights_pars_begin: lights_pars_begin,
		lights_toon_fragment: lights_toon_fragment,
		lights_toon_pars_fragment: lights_toon_pars_fragment,
		lights_phong_fragment: lights_phong_fragment,
		lights_phong_pars_fragment: lights_phong_pars_fragment,
		lights_physical_fragment: lights_physical_fragment,
		lights_physical_pars_fragment: lights_physical_pars_fragment,
		lights_fragment_begin: lights_fragment_begin,
		lights_fragment_maps: lights_fragment_maps,
		lights_fragment_end: lights_fragment_end,
		logdepthbuf_fragment: logdepthbuf_fragment,
		logdepthbuf_pars_fragment: logdepthbuf_pars_fragment,
		logdepthbuf_pars_vertex: logdepthbuf_pars_vertex,
		logdepthbuf_vertex: logdepthbuf_vertex,
		map_fragment: map_fragment,
		map_pars_fragment: map_pars_fragment,
		map_particle_fragment: map_particle_fragment,
		map_particle_pars_fragment: map_particle_pars_fragment,
		metalnessmap_fragment: metalnessmap_fragment,
		metalnessmap_pars_fragment: metalnessmap_pars_fragment,
		morphcolor_vertex: morphcolor_vertex,
		morphnormal_vertex: morphnormal_vertex,
		morphtarget_pars_vertex: morphtarget_pars_vertex,
		morphtarget_vertex: morphtarget_vertex,
		normal_fragment_begin: normal_fragment_begin,
		normal_fragment_maps: normal_fragment_maps,
		normal_pars_fragment: normal_pars_fragment,
		normal_pars_vertex: normal_pars_vertex,
		normal_vertex: normal_vertex,
		normalmap_pars_fragment: normalmap_pars_fragment,
		clearcoat_normal_fragment_begin: clearcoat_normal_fragment_begin,
		clearcoat_normal_fragment_maps: clearcoat_normal_fragment_maps,
		clearcoat_pars_fragment: clearcoat_pars_fragment,
		iridescence_pars_fragment: iridescence_pars_fragment,
		output_fragment: output_fragment,
		packing: packing,
		premultiplied_alpha_fragment: premultiplied_alpha_fragment,
		project_vertex: project_vertex,
		dithering_fragment: dithering_fragment,
		dithering_pars_fragment: dithering_pars_fragment,
		roughnessmap_fragment: roughnessmap_fragment,
		roughnessmap_pars_fragment: roughnessmap_pars_fragment,
		shadowmap_pars_fragment: shadowmap_pars_fragment,
		shadowmap_pars_vertex: shadowmap_pars_vertex,
		shadowmap_vertex: shadowmap_vertex,
		shadowmask_pars_fragment: shadowmask_pars_fragment,
		skinbase_vertex: skinbase_vertex,
		skinning_pars_vertex: skinning_pars_vertex,
		skinning_vertex: skinning_vertex,
		skinnormal_vertex: skinnormal_vertex,
		specularmap_fragment: specularmap_fragment,
		specularmap_pars_fragment: specularmap_pars_fragment,
		tonemapping_fragment: tonemapping_fragment,
		tonemapping_pars_fragment: tonemapping_pars_fragment,
		transmission_fragment: transmission_fragment,
		transmission_pars_fragment: transmission_pars_fragment,
		uv_pars_fragment: uv_pars_fragment,
		uv_pars_vertex: uv_pars_vertex,
		uv_vertex: uv_vertex,
		uv2_pars_fragment: uv2_pars_fragment,
		uv2_pars_vertex: uv2_pars_vertex,
		uv2_vertex: uv2_vertex,
		worldpos_vertex: worldpos_vertex,
		background_vert: vertex$g,
		background_frag: fragment$g,
		cube_vert: vertex$f,
		cube_frag: fragment$f,
		depth_vert: vertex$e,
		depth_frag: fragment$e,
		distanceRGBA_vert: vertex$d,
		distanceRGBA_frag: fragment$d,
		equirect_vert: vertex$c,
		equirect_frag: fragment$c,
		linedashed_vert: vertex$b,
		linedashed_frag: fragment$b,
		meshbasic_vert: vertex$a,
		meshbasic_frag: fragment$a,
		meshlambert_vert: vertex$9,
		meshlambert_frag: fragment$9,
		meshmatcap_vert: vertex$8,
		meshmatcap_frag: fragment$8,
		meshnormal_vert: vertex$7,
		meshnormal_frag: fragment$7,
		meshphong_vert: vertex$6,
		meshphong_frag: fragment$6,
		meshphysical_vert: vertex$5,
		meshphysical_frag: fragment$5,
		meshtoon_vert: vertex$4,
		meshtoon_frag: fragment$4,
		points_vert: vertex$3,
		points_frag: fragment$3,
		shadow_vert: vertex$2,
		shadow_frag: fragment$2,
		sprite_vert: vertex$1,
		sprite_frag: fragment$1
	};

	/**
	 * Uniforms library for shared webgl shaders
	 */

	const UniformsLib = {
		common: {
			diffuse: {
				value: /*@__PURE__*/new Color(0xffffff)
			},
			opacity: {
				value: 1.0
			},
			map: {
				value: null
			},
			uvTransform: {
				value: /*@__PURE__*/new Matrix3()
			},
			uv2Transform: {
				value: /*@__PURE__*/new Matrix3()
			},
			alphaMap: {
				value: null
			},
			alphaTest: {
				value: 0
			}
		},
		specularmap: {
			specularMap: {
				value: null
			}
		},
		envmap: {
			envMap: {
				value: null
			},
			flipEnvMap: {
				value: -1
			},
			reflectivity: {
				value: 1.0
			},
			// basic, lambert, phong
			ior: {
				value: 1.5
			},
			// physical
			refractionRatio: {
				value: 0.98
			} // basic, lambert, phong

		},
		aomap: {
			aoMap: {
				value: null
			},
			aoMapIntensity: {
				value: 1
			}
		},
		lightmap: {
			lightMap: {
				value: null
			},
			lightMapIntensity: {
				value: 1
			}
		},
		emissivemap: {
			emissiveMap: {
				value: null
			}
		},
		bumpmap: {
			bumpMap: {
				value: null
			},
			bumpScale: {
				value: 1
			}
		},
		normalmap: {
			normalMap: {
				value: null
			},
			normalScale: {
				value: /*@__PURE__*/new Vector2(1, 1)
			}
		},
		displacementmap: {
			displacementMap: {
				value: null
			},
			displacementScale: {
				value: 1
			},
			displacementBias: {
				value: 0
			}
		},
		roughnessmap: {
			roughnessMap: {
				value: null
			}
		},
		metalnessmap: {
			metalnessMap: {
				value: null
			}
		},
		gradientmap: {
			gradientMap: {
				value: null
			}
		},
		fog: {
			fogDensity: {
				value: 0.00025
			},
			fogNear: {
				value: 1
			},
			fogFar: {
				value: 2000
			},
			fogColor: {
				value: /*@__PURE__*/new Color(0xffffff)
			}
		},
		lights: {
			ambientLightColor: {
				value: []
			},
			lightProbe: {
				value: []
			},
			directionalLights: {
				value: [],
				properties: {
					direction: {},
					color: {}
				}
			},
			directionalLightShadows: {
				value: [],
				properties: {
					shadowBias: {},
					shadowNormalBias: {},
					shadowRadius: {},
					shadowMapSize: {}
				}
			},
			directionalShadowMap: {
				value: []
			},
			directionalShadowMatrix: {
				value: []
			},
			spotLights: {
				value: [],
				properties: {
					color: {},
					position: {},
					direction: {},
					distance: {},
					coneCos: {},
					penumbraCos: {},
					decay: {}
				}
			},
			spotLightShadows: {
				value: [],
				properties: {
					shadowBias: {},
					shadowNormalBias: {},
					shadowRadius: {},
					shadowMapSize: {}
				}
			},
			spotShadowMap: {
				value: []
			},
			spotShadowMatrix: {
				value: []
			},
			pointLights: {
				value: [],
				properties: {
					color: {},
					position: {},
					decay: {},
					distance: {}
				}
			},
			pointLightShadows: {
				value: [],
				properties: {
					shadowBias: {},
					shadowNormalBias: {},
					shadowRadius: {},
					shadowMapSize: {},
					shadowCameraNear: {},
					shadowCameraFar: {}
				}
			},
			pointShadowMap: {
				value: []
			},
			pointShadowMatrix: {
				value: []
			},
			hemisphereLights: {
				value: [],
				properties: {
					direction: {},
					skyColor: {},
					groundColor: {}
				}
			},
			// TODO (abelnation): RectAreaLight BRDF data needs to be moved from example to main src
			rectAreaLights: {
				value: [],
				properties: {
					color: {},
					position: {},
					width: {},
					height: {}
				}
			},
			ltc_1: {
				value: null
			},
			ltc_2: {
				value: null
			}
		},
		points: {
			diffuse: {
				value: /*@__PURE__*/new Color(0xffffff)
			},
			opacity: {
				value: 1.0
			},
			size: {
				value: 1.0
			},
			scale: {
				value: 1.0
			},
			map: {
				value: null
			},
			alphaMap: {
				value: null
			},
			alphaTest: {
				value: 0
			},
			uvTransform: {
				value: /*@__PURE__*/new Matrix3()
			}
		},
		sprite: {
			diffuse: {
				value: /*@__PURE__*/new Color(0xffffff)
			},
			opacity: {
				value: 1.0
			},
			center: {
				value: /*@__PURE__*/new Vector2(0.5, 0.5)
			},
			rotation: {
				value: 0.0
			},
			map: {
				value: null
			},
			alphaMap: {
				value: null
			},
			alphaTest: {
				value: 0
			},
			uvTransform: {
				value: /*@__PURE__*/new Matrix3()
			}
		}
	};

	const ShaderLib = {
		basic: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.common, UniformsLib.specularmap, UniformsLib.envmap, UniformsLib.aomap, UniformsLib.lightmap, UniformsLib.fog]),
			vertexShader: ShaderChunk.meshbasic_vert,
			fragmentShader: ShaderChunk.meshbasic_frag
		},
		lambert: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.common, UniformsLib.specularmap, UniformsLib.envmap, UniformsLib.aomap, UniformsLib.lightmap, UniformsLib.emissivemap, UniformsLib.fog, UniformsLib.lights, {
				emissive: {
					value: /*@__PURE__*/new Color(0x000000)
				}
			}]),
			vertexShader: ShaderChunk.meshlambert_vert,
			fragmentShader: ShaderChunk.meshlambert_frag
		},
		phong: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.common, UniformsLib.specularmap, UniformsLib.envmap, UniformsLib.aomap, UniformsLib.lightmap, UniformsLib.emissivemap, UniformsLib.bumpmap, UniformsLib.normalmap, UniformsLib.displacementmap, UniformsLib.fog, UniformsLib.lights, {
				emissive: {
					value: /*@__PURE__*/new Color(0x000000)
				},
				specular: {
					value: /*@__PURE__*/new Color(0x111111)
				},
				shininess: {
					value: 30
				}
			}]),
			vertexShader: ShaderChunk.meshphong_vert,
			fragmentShader: ShaderChunk.meshphong_frag
		},
		standard: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.common, UniformsLib.envmap, UniformsLib.aomap, UniformsLib.lightmap, UniformsLib.emissivemap, UniformsLib.bumpmap, UniformsLib.normalmap, UniformsLib.displacementmap, UniformsLib.roughnessmap, UniformsLib.metalnessmap, UniformsLib.fog, UniformsLib.lights, {
				emissive: {
					value: /*@__PURE__*/new Color(0x000000)
				},
				roughness: {
					value: 1.0
				},
				metalness: {
					value: 0.0
				},
				envMapIntensity: {
					value: 1
				} // temporary

			}]),
			vertexShader: ShaderChunk.meshphysical_vert,
			fragmentShader: ShaderChunk.meshphysical_frag
		},
		toon: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.common, UniformsLib.aomap, UniformsLib.lightmap, UniformsLib.emissivemap, UniformsLib.bumpmap, UniformsLib.normalmap, UniformsLib.displacementmap, UniformsLib.gradientmap, UniformsLib.fog, UniformsLib.lights, {
				emissive: {
					value: /*@__PURE__*/new Color(0x000000)
				}
			}]),
			vertexShader: ShaderChunk.meshtoon_vert,
			fragmentShader: ShaderChunk.meshtoon_frag
		},
		matcap: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.common, UniformsLib.bumpmap, UniformsLib.normalmap, UniformsLib.displacementmap, UniformsLib.fog, {
				matcap: {
					value: null
				}
			}]),
			vertexShader: ShaderChunk.meshmatcap_vert,
			fragmentShader: ShaderChunk.meshmatcap_frag
		},
		points: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.points, UniformsLib.fog]),
			vertexShader: ShaderChunk.points_vert,
			fragmentShader: ShaderChunk.points_frag
		},
		dashed: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.common, UniformsLib.fog, {
				scale: {
					value: 1
				},
				dashSize: {
					value: 1
				},
				totalSize: {
					value: 2
				}
			}]),
			vertexShader: ShaderChunk.linedashed_vert,
			fragmentShader: ShaderChunk.linedashed_frag
		},
		depth: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.common, UniformsLib.displacementmap]),
			vertexShader: ShaderChunk.depth_vert,
			fragmentShader: ShaderChunk.depth_frag
		},
		normal: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.common, UniformsLib.bumpmap, UniformsLib.normalmap, UniformsLib.displacementmap, {
				opacity: {
					value: 1.0
				}
			}]),
			vertexShader: ShaderChunk.meshnormal_vert,
			fragmentShader: ShaderChunk.meshnormal_frag
		},
		sprite: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.sprite, UniformsLib.fog]),
			vertexShader: ShaderChunk.sprite_vert,
			fragmentShader: ShaderChunk.sprite_frag
		},
		background: {
			uniforms: {
				uvTransform: {
					value: /*@__PURE__*/new Matrix3()
				},
				t2D: {
					value: null
				}
			},
			vertexShader: ShaderChunk.background_vert,
			fragmentShader: ShaderChunk.background_frag
		},
		cube: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.envmap, {
				opacity: {
					value: 1.0
				}
			}]),
			vertexShader: ShaderChunk.cube_vert,
			fragmentShader: ShaderChunk.cube_frag
		},
		equirect: {
			uniforms: {
				tEquirect: {
					value: null
				}
			},
			vertexShader: ShaderChunk.equirect_vert,
			fragmentShader: ShaderChunk.equirect_frag
		},
		distanceRGBA: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.common, UniformsLib.displacementmap, {
				referencePosition: {
					value: /*@__PURE__*/new Vector3()
				},
				nearDistance: {
					value: 1
				},
				farDistance: {
					value: 1000
				}
			}]),
			vertexShader: ShaderChunk.distanceRGBA_vert,
			fragmentShader: ShaderChunk.distanceRGBA_frag
		},
		shadow: {
			uniforms: /*@__PURE__*/mergeUniforms([UniformsLib.lights, UniformsLib.fog, {
				color: {
					value: /*@__PURE__*/new Color(0x00000)
				},
				opacity: {
					value: 1.0
				}
			}]),
			vertexShader: ShaderChunk.shadow_vert,
			fragmentShader: ShaderChunk.shadow_frag
		}
	};
	ShaderLib.physical = {
		uniforms: /*@__PURE__*/mergeUniforms([ShaderLib.standard.uniforms, {
			clearcoat: {
				value: 0
			},
			clearcoatMap: {
				value: null
			},
			clearcoatRoughness: {
				value: 0
			},
			clearcoatRoughnessMap: {
				value: null
			},
			clearcoatNormalScale: {
				value: /*@__PURE__*/new Vector2(1, 1)
			},
			clearcoatNormalMap: {
				value: null
			},
			iridescence: {
				value: 0
			},
			iridescenceMap: {
				value: null
			},
			iridescenceIOR: {
				value: 1.3
			},
			iridescenceThicknessMinimum: {
				value: 100
			},
			iridescenceThicknessMaximum: {
				value: 400
			},
			iridescenceThicknessMap: {
				value: null
			},
			sheen: {
				value: 0
			},
			sheenColor: {
				value: /*@__PURE__*/new Color(0x000000)
			},
			sheenColorMap: {
				value: null
			},
			sheenRoughness: {
				value: 1
			},
			sheenRoughnessMap: {
				value: null
			},
			transmission: {
				value: 0
			},
			transmissionMap: {
				value: null
			},
			transmissionSamplerSize: {
				value: /*@__PURE__*/new Vector2()
			},
			transmissionSamplerMap: {
				value: null
			},
			thickness: {
				value: 0
			},
			thicknessMap: {
				value: null
			},
			attenuationDistance: {
				value: 0
			},
			attenuationColor: {
				value: /*@__PURE__*/new Color(0x000000)
			},
			specularIntensity: {
				value: 1
			},
			specularIntensityMap: {
				value: null
			},
			specularColor: {
				value: /*@__PURE__*/new Color(1, 1, 1)
			},
			specularColorMap: {
				value: null
			}
		}]),
		vertexShader: ShaderChunk.meshphysical_vert,
		fragmentShader: ShaderChunk.meshphysical_frag
	};

	function WebGLBackground(renderer, cubemaps, state, objects, alpha, premultipliedAlpha) {
		const clearColor = new Color(0x000000);
		let clearAlpha = alpha === true ? 0 : 1;
		let planeMesh;
		let boxMesh;
		let currentBackground = null;
		let currentBackgroundVersion = 0;
		let currentTonemapping = null;

		function render(renderList, scene) {
			let forceClear = false;
			let background = scene.isScene === true ? scene.background : null;

			if (background && background.isTexture) {
				background = cubemaps.get(background);
			} // Ignore background in AR
			// TODO: Reconsider this.


			const xr = renderer.xr;
			const session = xr.getSession && xr.getSession();

			if (session && session.environmentBlendMode === 'additive') {
				background = null;
			}

			if (background === null) {
				setClear(clearColor, clearAlpha);
			} else if (background && background.isColor) {
				setClear(background, 1);
				forceClear = true;
			}

			if (renderer.autoClear || forceClear) {
				renderer.clear(renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil);
			}

			if (background && (background.isCubeTexture || background.mapping === CubeUVReflectionMapping)) {
				if (boxMesh === undefined) {
					boxMesh = new Mesh(new BoxGeometry(1, 1, 1), new ShaderMaterial({
						name: 'BackgroundCubeMaterial',
						uniforms: cloneUniforms(ShaderLib.cube.uniforms),
						vertexShader: ShaderLib.cube.vertexShader,
						fragmentShader: ShaderLib.cube.fragmentShader,
						side: BackSide,
						depthTest: false,
						depthWrite: false,
						fog: false
					}));
					boxMesh.geometry.deleteAttribute('normal');
					boxMesh.geometry.deleteAttribute('uv');

					boxMesh.onBeforeRender = function (renderer, scene, camera) {
						this.matrixWorld.copyPosition(camera.matrixWorld);
					}; // enable code injection for non-built-in material


					Object.defineProperty(boxMesh.material, 'envMap', {
						get: function () {
							return this.uniforms.envMap.value;
						}
					});
					objects.update(boxMesh);
				}

				boxMesh.material.uniforms.envMap.value = background;
				boxMesh.material.uniforms.flipEnvMap.value = background.isCubeTexture && background.isRenderTargetTexture === false ? -1 : 1;

				if (currentBackground !== background || currentBackgroundVersion !== background.version || currentTonemapping !== renderer.toneMapping) {
					boxMesh.material.needsUpdate = true;
					currentBackground = background;
					currentBackgroundVersion = background.version;
					currentTonemapping = renderer.toneMapping;
				}

				boxMesh.layers.enableAll(); // push to the pre-sorted opaque render list

				renderList.unshift(boxMesh, boxMesh.geometry, boxMesh.material, 0, 0, null);
			} else if (background && background.isTexture) {
				if (planeMesh === undefined) {
					planeMesh = new Mesh(new PlaneGeometry(2, 2), new ShaderMaterial({
						name: 'BackgroundMaterial',
						uniforms: cloneUniforms(ShaderLib.background.uniforms),
						vertexShader: ShaderLib.background.vertexShader,
						fragmentShader: ShaderLib.background.fragmentShader,
						side: FrontSide,
						depthTest: false,
						depthWrite: false,
						fog: false
					}));
					planeMesh.geometry.deleteAttribute('normal'); // enable code injection for non-built-in material

					Object.defineProperty(planeMesh.material, 'map', {
						get: function () {
							return this.uniforms.t2D.value;
						}
					});
					objects.update(planeMesh);
				}

				planeMesh.material.uniforms.t2D.value = background;

				if (background.matrixAutoUpdate === true) {
					background.updateMatrix();
				}

				planeMesh.material.uniforms.uvTransform.value.copy(background.matrix);

				if (currentBackground !== background || currentBackgroundVersion !== background.version || currentTonemapping !== renderer.toneMapping) {
					planeMesh.material.needsUpdate = true;
					currentBackground = background;
					currentBackgroundVersion = background.version;
					currentTonemapping = renderer.toneMapping;
				}

				planeMesh.layers.enableAll(); // push to the pre-sorted opaque render list

				renderList.unshift(planeMesh, planeMesh.geometry, planeMesh.material, 0, 0, null);
			}
		}

		function setClear(color, alpha) {
			state.buffers.color.setClear(color.r, color.g, color.b, alpha, premultipliedAlpha);
		}

		return {
			getClearColor: function () {
				return clearColor;
			},
			setClearColor: function (color, alpha = 1) {
				clearColor.set(color);
				clearAlpha = alpha;
				setClear(clearColor, clearAlpha);
			},
			getClearAlpha: function () {
				return clearAlpha;
			},
			setClearAlpha: function (alpha) {
				clearAlpha = alpha;
				setClear(clearColor, clearAlpha);
			},
			render: render
		};
	}

	function WebGLBindingStates(gl, extensions, attributes, capabilities) {
		const maxVertexAttributes = gl.getParameter(gl.MAX_VERTEX_ATTRIBS);
		const extension = capabilities.isWebGL2 ? null : extensions.get('OES_vertex_array_object');
		const vaoAvailable = capabilities.isWebGL2 || extension !== null;
		const bindingStates = {};
		const defaultState = createBindingState(null);
		let currentState = defaultState;
		let forceUpdate = false;

		function setup(object, material, program, geometry, index) {
			let updateBuffers = false;

			if (vaoAvailable) {
				const state = getBindingState(geometry, program, material);

				if (currentState !== state) {
					currentState = state;
					bindVertexArrayObject(currentState.object);
				}

				updateBuffers = needsUpdate(object, geometry, program, index);
				if (updateBuffers) saveCache(object, geometry, program, index);
			} else {
				const wireframe = material.wireframe === true;

				if (currentState.geometry !== geometry.id || currentState.program !== program.id || currentState.wireframe !== wireframe) {
					currentState.geometry = geometry.id;
					currentState.program = program.id;
					currentState.wireframe = wireframe;
					updateBuffers = true;
				}
			}

			if (index !== null) {
				attributes.update(index, gl.ELEMENT_ARRAY_BUFFER);
			}

			if (updateBuffers || forceUpdate) {
				forceUpdate = false;
				setupVertexAttributes(object, material, program, geometry);

				if (index !== null) {
					gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, attributes.get(index).buffer);
				}
			}
		}

		function createVertexArrayObject() {
			if (capabilities.isWebGL2) return gl.createVertexArray();
			return extension.createVertexArrayOES();
		}

		function bindVertexArrayObject(vao) {
			if (capabilities.isWebGL2) return gl.bindVertexArray(vao);
			return extension.bindVertexArrayOES(vao);
		}

		function deleteVertexArrayObject(vao) {
			if (capabilities.isWebGL2) return gl.deleteVertexArray(vao);
			return extension.deleteVertexArrayOES(vao);
		}

		function getBindingState(geometry, program, material) {
			const wireframe = material.wireframe === true;
			let programMap = bindingStates[geometry.id];

			if (programMap === undefined) {
				programMap = {};
				bindingStates[geometry.id] = programMap;
			}

			let stateMap = programMap[program.id];

			if (stateMap === undefined) {
				stateMap = {};
				programMap[program.id] = stateMap;
			}

			let state = stateMap[wireframe];

			if (state === undefined) {
				state = createBindingState(createVertexArrayObject());
				stateMap[wireframe] = state;
			}

			return state;
		}

		function createBindingState(vao) {
			const newAttributes = [];
			const enabledAttributes = [];
			const attributeDivisors = [];

			for (let i = 0; i < maxVertexAttributes; i++) {
				newAttributes[i] = 0;
				enabledAttributes[i] = 0;
				attributeDivisors[i] = 0;
			}

			return {
				// for backward compatibility on non-VAO support browser
				geometry: null,
				program: null,
				wireframe: false,
				newAttributes: newAttributes,
				enabledAttributes: enabledAttributes,
				attributeDivisors: attributeDivisors,
				object: vao,
				attributes: {},
				index: null
			};
		}

		function needsUpdate(object, geometry, program, index) {
			const cachedAttributes = currentState.attributes;
			const geometryAttributes = geometry.attributes;
			let attributesNum = 0;
			const programAttributes = program.getAttributes();

			for (const name in programAttributes) {
				const programAttribute = programAttributes[name];

				if (programAttribute.location >= 0) {
					const cachedAttribute = cachedAttributes[name];
					let geometryAttribute = geometryAttributes[name];

					if (geometryAttribute === undefined) {
						if (name === 'instanceMatrix' && object.instanceMatrix) geometryAttribute = object.instanceMatrix;
						if (name === 'instanceColor' && object.instanceColor) geometryAttribute = object.instanceColor;
					}

					if (cachedAttribute === undefined) return true;
					if (cachedAttribute.attribute !== geometryAttribute) return true;
					if (geometryAttribute && cachedAttribute.data !== geometryAttribute.data) return true;
					attributesNum++;
				}
			}

			if (currentState.attributesNum !== attributesNum) return true;
			if (currentState.index !== index) return true;
			return false;
		}

		function saveCache(object, geometry, program, index) {
			const cache = {};
			const attributes = geometry.attributes;
			let attributesNum = 0;
			const programAttributes = program.getAttributes();

			for (const name in programAttributes) {
				const programAttribute = programAttributes[name];

				if (programAttribute.location >= 0) {
					let attribute = attributes[name];

					if (attribute === undefined) {
						if (name === 'instanceMatrix' && object.instanceMatrix) attribute = object.instanceMatrix;
						if (name === 'instanceColor' && object.instanceColor) attribute = object.instanceColor;
					}

					const data = {};
					data.attribute = attribute;

					if (attribute && attribute.data) {
						data.data = attribute.data;
					}

					cache[name] = data;
					attributesNum++;
				}
			}

			currentState.attributes = cache;
			currentState.attributesNum = attributesNum;
			currentState.index = index;
		}

		function initAttributes() {
			const newAttributes = currentState.newAttributes;

			for (let i = 0, il = newAttributes.length; i < il; i++) {
				newAttributes[i] = 0;
			}
		}

		function enableAttribute(attribute) {
			enableAttributeAndDivisor(attribute, 0);
		}

		function enableAttributeAndDivisor(attribute, meshPerAttribute) {
			const newAttributes = currentState.newAttributes;
			const enabledAttributes = currentState.enabledAttributes;
			const attributeDivisors = currentState.attributeDivisors;
			newAttributes[attribute] = 1;

			if (enabledAttributes[attribute] === 0) {
				gl.enableVertexAttribArray(attribute);
				enabledAttributes[attribute] = 1;
			}

			if (attributeDivisors[attribute] !== meshPerAttribute) {
				const extension = capabilities.isWebGL2 ? gl : extensions.get('ANGLE_instanced_arrays');
				extension[capabilities.isWebGL2 ? 'vertexAttribDivisor' : 'vertexAttribDivisorANGLE'](attribute, meshPerAttribute);
				attributeDivisors[attribute] = meshPerAttribute;
			}
		}

		function disableUnusedAttributes() {
			const newAttributes = currentState.newAttributes;
			const enabledAttributes = currentState.enabledAttributes;

			for (let i = 0, il = enabledAttributes.length; i < il; i++) {
				if (enabledAttributes[i] !== newAttributes[i]) {
					gl.disableVertexAttribArray(i);
					enabledAttributes[i] = 0;
				}
			}
		}

		function vertexAttribPointer(index, size, type, normalized, stride, offset) {
			if (capabilities.isWebGL2 === true && (type === gl.INT || type === gl.UNSIGNED_INT)) {
				gl.vertexAttribIPointer(index, size, type, stride, offset);
			} else {
				gl.vertexAttribPointer(index, size, type, normalized, stride, offset);
			}
		}

		function setupVertexAttributes(object, material, program, geometry) {
			if (capabilities.isWebGL2 === false && (object.isInstancedMesh || geometry.isInstancedBufferGeometry)) {
				if (extensions.get('ANGLE_instanced_arrays') === null) return;
			}

			initAttributes();
			const geometryAttributes = geometry.attributes;
			const programAttributes = program.getAttributes();
			const materialDefaultAttributeValues = material.defaultAttributeValues;

			for (const name in programAttributes) {
				const programAttribute = programAttributes[name];

				if (programAttribute.location >= 0) {
					let geometryAttribute = geometryAttributes[name];

					if (geometryAttribute === undefined) {
						if (name === 'instanceMatrix' && object.instanceMatrix) geometryAttribute = object.instanceMatrix;
						if (name === 'instanceColor' && object.instanceColor) geometryAttribute = object.instanceColor;
					}

					if (geometryAttribute !== undefined) {
						const normalized = geometryAttribute.normalized;
						const size = geometryAttribute.itemSize;
						const attribute = attributes.get(geometryAttribute); // TODO Attribute may not be available on context restore

						if (attribute === undefined) continue;
						const buffer = attribute.buffer;
						const type = attribute.type;
						const bytesPerElement = attribute.bytesPerElement;

						if (geometryAttribute.isInterleavedBufferAttribute) {
							const data = geometryAttribute.data;
							const stride = data.stride;
							const offset = geometryAttribute.offset;

							if (data.isInstancedInterleavedBuffer) {
								for (let i = 0; i < programAttribute.locationSize; i++) {
									enableAttributeAndDivisor(programAttribute.location + i, data.meshPerAttribute);
								}

								if (object.isInstancedMesh !== true && geometry._maxInstanceCount === undefined) {
									geometry._maxInstanceCount = data.meshPerAttribute * data.count;
								}
							} else {
								for (let i = 0; i < programAttribute.locationSize; i++) {
									enableAttribute(programAttribute.location + i);
								}
							}

							gl.bindBuffer(gl.ARRAY_BUFFER, buffer);

							for (let i = 0; i < programAttribute.locationSize; i++) {
								vertexAttribPointer(programAttribute.location + i, size / programAttribute.locationSize, type, normalized, stride * bytesPerElement, (offset + size / programAttribute.locationSize * i) * bytesPerElement);
							}
						} else {
							if (geometryAttribute.isInstancedBufferAttribute) {
								for (let i = 0; i < programAttribute.locationSize; i++) {
									enableAttributeAndDivisor(programAttribute.location + i, geometryAttribute.meshPerAttribute);
								}

								if (object.isInstancedMesh !== true && geometry._maxInstanceCount === undefined) {
									geometry._maxInstanceCount = geometryAttribute.meshPerAttribute * geometryAttribute.count;
								}
							} else {
								for (let i = 0; i < programAttribute.locationSize; i++) {
									enableAttribute(programAttribute.location + i);
								}
							}

							gl.bindBuffer(gl.ARRAY_BUFFER, buffer);

							for (let i = 0; i < programAttribute.locationSize; i++) {
								vertexAttribPointer(programAttribute.location + i, size / programAttribute.locationSize, type, normalized, size * bytesPerElement, size / programAttribute.locationSize * i * bytesPerElement);
							}
						}
					} else if (materialDefaultAttributeValues !== undefined) {
						const value = materialDefaultAttributeValues[name];

						if (value !== undefined) {
							switch (value.length) {
								case 2:
									gl.vertexAttrib2fv(programAttribute.location, value);
									break;

								case 3:
									gl.vertexAttrib3fv(programAttribute.location, value);
									break;

								case 4:
									gl.vertexAttrib4fv(programAttribute.location, value);
									break;

								default:
									gl.vertexAttrib1fv(programAttribute.location, value);
							}
						}
					}
				}
			}

			disableUnusedAttributes();
		}

		function dispose() {
			reset();

			for (const geometryId in bindingStates) {
				const programMap = bindingStates[geometryId];

				for (const programId in programMap) {
					const stateMap = programMap[programId];

					for (const wireframe in stateMap) {
						deleteVertexArrayObject(stateMap[wireframe].object);
						delete stateMap[wireframe];
					}

					delete programMap[programId];
				}

				delete bindingStates[geometryId];
			}
		}

		function releaseStatesOfGeometry(geometry) {
			if (bindingStates[geometry.id] === undefined) return;
			const programMap = bindingStates[geometry.id];

			for (const programId in programMap) {
				const stateMap = programMap[programId];

				for (const wireframe in stateMap) {
					deleteVertexArrayObject(stateMap[wireframe].object);
					delete stateMap[wireframe];
				}

				delete programMap[programId];
			}

			delete bindingStates[geometry.id];
		}

		function releaseStatesOfProgram(program) {
			for (const geometryId in bindingStates) {
				const programMap = bindingStates[geometryId];
				if (programMap[program.id] === undefined) continue;
				const stateMap = programMap[program.id];

				for (const wireframe in stateMap) {
					deleteVertexArrayObject(stateMap[wireframe].object);
					delete stateMap[wireframe];
				}

				delete programMap[program.id];
			}
		}

		function reset() {
			resetDefaultState();
			forceUpdate = true;
			if (currentState === defaultState) return;
			currentState = defaultState;
			bindVertexArrayObject(currentState.object);
		} // for backward-compatibility


		function resetDefaultState() {
			defaultState.geometry = null;
			defaultState.program = null;
			defaultState.wireframe = false;
		}

		return {
			setup: setup,
			reset: reset,
			resetDefaultState: resetDefaultState,
			dispose: dispose,
			releaseStatesOfGeometry: releaseStatesOfGeometry,
			releaseStatesOfProgram: releaseStatesOfProgram,
			initAttributes: initAttributes,
			enableAttribute: enableAttribute,
			disableUnusedAttributes: disableUnusedAttributes
		};
	}

	function WebGLBufferRenderer(gl, extensions, info, capabilities) {
		const isWebGL2 = capabilities.isWebGL2;
		let mode;

		function setMode(value) {
			mode = value;
		}

		function render(start, count) {
			gl.drawArrays(mode, start, count);
			info.update(count, mode, 1);
		}

		function renderInstances(start, count, primcount) {
			if (primcount === 0) return;
			let extension, methodName;

			if (isWebGL2) {
				extension = gl;
				methodName = 'drawArraysInstanced';
			} else {
				extension = extensions.get('ANGLE_instanced_arrays');
				methodName = 'drawArraysInstancedANGLE';

				if (extension === null) {
					console.error('THREE.WebGLBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.');
					return;
				}
			}

			extension[methodName](mode, start, count, primcount);
			info.update(count, mode, primcount);
		} //


		this.setMode = setMode;
		this.render = render;
		this.renderInstances = renderInstances;
	}

	function WebGLCapabilities(gl, extensions, parameters) {
		let maxAnisotropy;

		function getMaxAnisotropy() {
			if (maxAnisotropy !== undefined) return maxAnisotropy;

			if (extensions.has('EXT_texture_filter_anisotropic') === true) {
				const extension = extensions.get('EXT_texture_filter_anisotropic');
				maxAnisotropy = gl.getParameter(extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT);
			} else {
				maxAnisotropy = 0;
			}

			return maxAnisotropy;
		}

		function getMaxPrecision(precision) {
			if (precision === 'highp') {
				if (gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.HIGH_FLOAT).precision > 0 && gl.getShaderPrecisionFormat(gl.FRAGMENT_SHADER, gl.HIGH_FLOAT).precision > 0) {
					return 'highp';
				}

				precision = 'mediump';
			}

			if (precision === 'mediump') {
				if (gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.MEDIUM_FLOAT).precision > 0 && gl.getShaderPrecisionFormat(gl.FRAGMENT_SHADER, gl.MEDIUM_FLOAT).precision > 0) {
					return 'mediump';
				}
			}

			return 'lowp';
		}

		const isWebGL2 = typeof WebGL2RenderingContext !== 'undefined' && gl instanceof WebGL2RenderingContext || typeof WebGL2ComputeRenderingContext !== 'undefined' && gl instanceof WebGL2ComputeRenderingContext;
		let precision = parameters.precision !== undefined ? parameters.precision : 'highp';
		const maxPrecision = getMaxPrecision(precision);

		if (maxPrecision !== precision) {
			console.warn('THREE.WebGLRenderer:', precision, 'not supported, using', maxPrecision, 'instead.');
			precision = maxPrecision;
		}

		const drawBuffers = isWebGL2 || extensions.has('WEBGL_draw_buffers');
		const logarithmicDepthBuffer = parameters.logarithmicDepthBuffer === true;
		const maxTextures = gl.getParameter(gl.MAX_TEXTURE_IMAGE_UNITS);
		const maxVertexTextures = gl.getParameter(gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS);
		const maxTextureSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);
		const maxCubemapSize = gl.getParameter(gl.MAX_CUBE_MAP_TEXTURE_SIZE);
		const maxAttributes = gl.getParameter(gl.MAX_VERTEX_ATTRIBS);
		const maxVertexUniforms = gl.getParameter(gl.MAX_VERTEX_UNIFORM_VECTORS);
		const maxVaryings = gl.getParameter(gl.MAX_VARYING_VECTORS);
		const maxFragmentUniforms = gl.getParameter(gl.MAX_FRAGMENT_UNIFORM_VECTORS);
		const vertexTextures = maxVertexTextures > 0;
		const floatFragmentTextures = isWebGL2 || extensions.has('OES_texture_float');
		const floatVertexTextures = vertexTextures && floatFragmentTextures;
		const maxSamples = isWebGL2 ? gl.getParameter(gl.MAX_SAMPLES) : 0;
		return {
			isWebGL2: isWebGL2,
			drawBuffers: drawBuffers,
			getMaxAnisotropy: getMaxAnisotropy,
			getMaxPrecision: getMaxPrecision,
			precision: precision,
			logarithmicDepthBuffer: logarithmicDepthBuffer,
			maxTextures: maxTextures,
			maxVertexTextures: maxVertexTextures,
			maxTextureSize: maxTextureSize,
			maxCubemapSize: maxCubemapSize,
			maxAttributes: maxAttributes,
			maxVertexUniforms: maxVertexUniforms,
			maxVaryings: maxVaryings,
			maxFragmentUniforms: maxFragmentUniforms,
			vertexTextures: vertexTextures,
			floatFragmentTextures: floatFragmentTextures,
			floatVertexTextures: floatVertexTextures,
			maxSamples: maxSamples
		};
	}

	function WebGLClipping(properties) {
		const scope = this;
		let globalState = null,
				numGlobalPlanes = 0,
				localClippingEnabled = false,
				renderingShadows = false;
		const plane = new Plane(),
					viewNormalMatrix = new Matrix3(),
					uniform = {
			value: null,
			needsUpdate: false
		};
		this.uniform = uniform;
		this.numPlanes = 0;
		this.numIntersection = 0;

		this.init = function (planes, enableLocalClipping, camera) {
			const enabled = planes.length !== 0 || enableLocalClipping || // enable state of previous frame - the clipping code has to
			// run another frame in order to reset the state:
			numGlobalPlanes !== 0 || localClippingEnabled;
			localClippingEnabled = enableLocalClipping;
			globalState = projectPlanes(planes, camera, 0);
			numGlobalPlanes = planes.length;
			return enabled;
		};

		this.beginShadows = function () {
			renderingShadows = true;
			projectPlanes(null);
		};

		this.endShadows = function () {
			renderingShadows = false;
			resetGlobalState();
		};

		this.setState = function (material, camera, useCache) {
			const planes = material.clippingPlanes,
						clipIntersection = material.clipIntersection,
						clipShadows = material.clipShadows;
			const materialProperties = properties.get(material);

			if (!localClippingEnabled || planes === null || planes.length === 0 || renderingShadows && !clipShadows) {
				// there's no local clipping
				if (renderingShadows) {
					// there's no global clipping
					projectPlanes(null);
				} else {
					resetGlobalState();
				}
			} else {
				const nGlobal = renderingShadows ? 0 : numGlobalPlanes,
							lGlobal = nGlobal * 4;
				let dstArray = materialProperties.clippingState || null;
				uniform.value = dstArray; // ensure unique state

				dstArray = projectPlanes(planes, camera, lGlobal, useCache);

				for (let i = 0; i !== lGlobal; ++i) {
					dstArray[i] = globalState[i];
				}

				materialProperties.clippingState = dstArray;
				this.numIntersection = clipIntersection ? this.numPlanes : 0;
				this.numPlanes += nGlobal;
			}
		};

		function resetGlobalState() {
			if (uniform.value !== globalState) {
				uniform.value = globalState;
				uniform.needsUpdate = numGlobalPlanes > 0;
			}

			scope.numPlanes = numGlobalPlanes;
			scope.numIntersection = 0;
		}

		function projectPlanes(planes, camera, dstOffset, skipTransform) {
			const nPlanes = planes !== null ? planes.length : 0;
			let dstArray = null;

			if (nPlanes !== 0) {
				dstArray = uniform.value;

				if (skipTransform !== true || dstArray === null) {
					const flatSize = dstOffset + nPlanes * 4,
								viewMatrix = camera.matrixWorldInverse;
					viewNormalMatrix.getNormalMatrix(viewMatrix);

					if (dstArray === null || dstArray.length < flatSize) {
						dstArray = new Float32Array(flatSize);
					}

					for (let i = 0, i4 = dstOffset; i !== nPlanes; ++i, i4 += 4) {
						plane.copy(planes[i]).applyMatrix4(viewMatrix, viewNormalMatrix);
						plane.normal.toArray(dstArray, i4);
						dstArray[i4 + 3] = plane.constant;
					}
				}

				uniform.value = dstArray;
				uniform.needsUpdate = true;
			}

			scope.numPlanes = nPlanes;
			scope.numIntersection = 0;
			return dstArray;
		}
	}

	function WebGLCubeMaps(renderer) {
		let cubemaps = new WeakMap();

		function mapTextureMapping(texture, mapping) {
			if (mapping === EquirectangularReflectionMapping) {
				texture.mapping = CubeReflectionMapping;
			} else if (mapping === EquirectangularRefractionMapping) {
				texture.mapping = CubeRefractionMapping;
			}

			return texture;
		}

		function get(texture) {
			if (texture && texture.isTexture && texture.isRenderTargetTexture === false) {
				const mapping = texture.mapping;

				if (mapping === EquirectangularReflectionMapping || mapping === EquirectangularRefractionMapping) {
					if (cubemaps.has(texture)) {
						const cubemap = cubemaps.get(texture).texture;
						return mapTextureMapping(cubemap, texture.mapping);
					} else {
						const image = texture.image;

						if (image && image.height > 0) {
							const renderTarget = new WebGLCubeRenderTarget(image.height / 2);
							renderTarget.fromEquirectangularTexture(renderer, texture);
							cubemaps.set(texture, renderTarget);
							texture.addEventListener('dispose', onTextureDispose);
							return mapTextureMapping(renderTarget.texture, texture.mapping);
						} else {
							// image not yet ready. try the conversion next frame
							return null;
						}
					}
				}
			}

			return texture;
		}

		function onTextureDispose(event) {
			const texture = event.target;
			texture.removeEventListener('dispose', onTextureDispose);
			const cubemap = cubemaps.get(texture);

			if (cubemap !== undefined) {
				cubemaps.delete(texture);
				cubemap.dispose();
			}
		}

		function dispose() {
			cubemaps = new WeakMap();
		}

		return {
			get: get,
			dispose: dispose
		};
	}

	class OrthographicCamera extends Camera {
		constructor(left = -1, right = 1, top = 1, bottom = -1, near = 0.1, far = 2000) {
			super();
			this.isOrthographicCamera = true;
			this.type = 'OrthographicCamera';
			this.zoom = 1;
			this.view = null;
			this.left = left;
			this.right = right;
			this.top = top;
			this.bottom = bottom;
			this.near = near;
			this.far = far;
			this.updateProjectionMatrix();
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.left = source.left;
			this.right = source.right;
			this.top = source.top;
			this.bottom = source.bottom;
			this.near = source.near;
			this.far = source.far;
			this.zoom = source.zoom;
			this.view = source.view === null ? null : Object.assign({}, source.view);
			return this;
		}

		setViewOffset(fullWidth, fullHeight, x, y, width, height) {
			if (this.view === null) {
				this.view = {
					enabled: true,
					fullWidth: 1,
					fullHeight: 1,
					offsetX: 0,
					offsetY: 0,
					width: 1,
					height: 1
				};
			}

			this.view.enabled = true;
			this.view.fullWidth = fullWidth;
			this.view.fullHeight = fullHeight;
			this.view.offsetX = x;
			this.view.offsetY = y;
			this.view.width = width;
			this.view.height = height;
			this.updateProjectionMatrix();
		}

		clearViewOffset() {
			if (this.view !== null) {
				this.view.enabled = false;
			}

			this.updateProjectionMatrix();
		}

		updateProjectionMatrix() {
			const dx = (this.right - this.left) / (2 * this.zoom);
			const dy = (this.top - this.bottom) / (2 * this.zoom);
			const cx = (this.right + this.left) / 2;
			const cy = (this.top + this.bottom) / 2;
			let left = cx - dx;
			let right = cx + dx;
			let top = cy + dy;
			let bottom = cy - dy;

			if (this.view !== null && this.view.enabled) {
				const scaleW = (this.right - this.left) / this.view.fullWidth / this.zoom;
				const scaleH = (this.top - this.bottom) / this.view.fullHeight / this.zoom;
				left += scaleW * this.view.offsetX;
				right = left + scaleW * this.view.width;
				top -= scaleH * this.view.offsetY;
				bottom = top - scaleH * this.view.height;
			}

			this.projectionMatrix.makeOrthographic(left, right, top, bottom, this.near, this.far);
			this.projectionMatrixInverse.copy(this.projectionMatrix).invert();
		}

		toJSON(meta) {
			const data = super.toJSON(meta);
			data.object.zoom = this.zoom;
			data.object.left = this.left;
			data.object.right = this.right;
			data.object.top = this.top;
			data.object.bottom = this.bottom;
			data.object.near = this.near;
			data.object.far = this.far;
			if (this.view !== null) data.object.view = Object.assign({}, this.view);
			return data;
		}

	}

	const LOD_MIN = 4; // The standard deviations (radians) associated with the extra mips. These are
	// chosen to approximate a Trowbridge-Reitz distribution function times the
	// geometric shadowing function. These sigma values squared must match the
	// variance #defines in cube_uv_reflection_fragment.glsl.js.

	const EXTRA_LOD_SIGMA = [0.125, 0.215, 0.35, 0.446, 0.526, 0.582]; // The maximum length of the blur for loop. Smaller sigmas will use fewer
	// samples and exit early, but not recompile the shader.

	const MAX_SAMPLES = 20;

	const _flatCamera = /*@__PURE__*/new OrthographicCamera();

	const _clearColor = /*@__PURE__*/new Color();

	let _oldTarget = null; // Golden Ratio

	const PHI = (1 + Math.sqrt(5)) / 2;
	const INV_PHI = 1 / PHI; // Vertices of a dodecahedron (except the opposites, which represent the
	// same axis), used as axis directions evenly spread on a sphere.

	const _axisDirections = [/*@__PURE__*/new Vector3(1, 1, 1), /*@__PURE__*/new Vector3(-1, 1, 1), /*@__PURE__*/new Vector3(1, 1, -1), /*@__PURE__*/new Vector3(-1, 1, -1), /*@__PURE__*/new Vector3(0, PHI, INV_PHI), /*@__PURE__*/new Vector3(0, PHI, -INV_PHI), /*@__PURE__*/new Vector3(INV_PHI, 0, PHI), /*@__PURE__*/new Vector3(-INV_PHI, 0, PHI), /*@__PURE__*/new Vector3(PHI, INV_PHI, 0), /*@__PURE__*/new Vector3(-PHI, INV_PHI, 0)];
	/**
	 * This class generates a Prefiltered, Mipmapped Radiance Environment Map
	 * (PMREM) from a cubeMap environment texture. This allows different levels of
	 * blur to be quickly accessed based on material roughness. It is packed into a
	 * special CubeUV format that allows us to perform custom interpolation so that
	 * we can support nonlinear formats such as RGBE. Unlike a traditional mipmap
	 * chain, it only goes down to the LOD_MIN level (above), and then creates extra
	 * even more filtered 'mips' at the same LOD_MIN resolution, associated with
	 * higher roughness levels. In this way we maintain resolution to smoothly
	 * interpolate diffuse lighting while limiting sampling computation.
	 *
	 * Paper: Fast, Accurate Image-Based Lighting
	 * https://drive.google.com/file/d/15y8r_UpKlU9SvV4ILb0C3qCPecS8pvLz/view
	*/

	class PMREMGenerator {
		constructor(renderer) {
			this._renderer = renderer;
			this._pingPongRenderTarget = null;
			this._lodMax = 0;
			this._cubeSize = 0;
			this._lodPlanes = [];
			this._sizeLods = [];
			this._sigmas = [];
			this._blurMaterial = null;
			this._cubemapMaterial = null;
			this._equirectMaterial = null;

			this._compileMaterial(this._blurMaterial);
		}
		/**
		 * Generates a PMREM from a supplied Scene, which can be faster than using an
		 * image if networking bandwidth is low. Optional sigma specifies a blur radius
		 * in radians to be applied to the scene before PMREM generation. Optional near
		 * and far planes ensure the scene is rendered in its entirety (the cubeCamera
		 * is placed at the origin).
		 */


		fromScene(scene, sigma = 0, near = 0.1, far = 100) {
			_oldTarget = this._renderer.getRenderTarget();

			this._setSize(256);

			const cubeUVRenderTarget = this._allocateTargets();

			cubeUVRenderTarget.depthBuffer = true;

			this._sceneToCubeUV(scene, near, far, cubeUVRenderTarget);

			if (sigma > 0) {
				this._blur(cubeUVRenderTarget, 0, 0, sigma);
			}

			this._applyPMREM(cubeUVRenderTarget);

			this._cleanup(cubeUVRenderTarget);

			return cubeUVRenderTarget;
		}
		/**
		 * Generates a PMREM from an equirectangular texture, which can be either LDR
		 * or HDR. The ideal input image size is 1k (1024 x 512),
		 * as this matches best with the 256 x 256 cubemap output.
		 */


		fromEquirectangular(equirectangular, renderTarget = null) {
			return this._fromTexture(equirectangular, renderTarget);
		}
		/**
		 * Generates a PMREM from an cubemap texture, which can be either LDR
		 * or HDR. The ideal input cube size is 256 x 256,
		 * as this matches best with the 256 x 256 cubemap output.
		 */


		fromCubemap(cubemap, renderTarget = null) {
			return this._fromTexture(cubemap, renderTarget);
		}
		/**
		 * Pre-compiles the cubemap shader. You can get faster start-up by invoking this method during
		 * your texture's network fetch for increased concurrency.
		 */


		compileCubemapShader() {
			if (this._cubemapMaterial === null) {
				this._cubemapMaterial = _getCubemapMaterial();

				this._compileMaterial(this._cubemapMaterial);
			}
		}
		/**
		 * Pre-compiles the equirectangular shader. You can get faster start-up by invoking this method during
		 * your texture's network fetch for increased concurrency.
		 */


		compileEquirectangularShader() {
			if (this._equirectMaterial === null) {
				this._equirectMaterial = _getEquirectMaterial();

				this._compileMaterial(this._equirectMaterial);
			}
		}
		/**
		 * Disposes of the PMREMGenerator's internal memory. Note that PMREMGenerator is a static class,
		 * so you should not need more than one PMREMGenerator object. If you do, calling dispose() on
		 * one of them will cause any others to also become unusable.
		 */


		dispose() {
			this._dispose();

			if (this._cubemapMaterial !== null) this._cubemapMaterial.dispose();
			if (this._equirectMaterial !== null) this._equirectMaterial.dispose();
		} // private interface


		_setSize(cubeSize) {
			this._lodMax = Math.floor(Math.log2(cubeSize));
			this._cubeSize = Math.pow(2, this._lodMax);
		}

		_dispose() {
			if (this._blurMaterial !== null) this._blurMaterial.dispose();
			if (this._pingPongRenderTarget !== null) this._pingPongRenderTarget.dispose();

			for (let i = 0; i < this._lodPlanes.length; i++) {
				this._lodPlanes[i].dispose();
			}
		}

		_cleanup(outputTarget) {
			this._renderer.setRenderTarget(_oldTarget);

			outputTarget.scissorTest = false;

			_setViewport(outputTarget, 0, 0, outputTarget.width, outputTarget.height);
		}

		_fromTexture(texture, renderTarget) {
			if (texture.mapping === CubeReflectionMapping || texture.mapping === CubeRefractionMapping) {
				this._setSize(texture.image.length === 0 ? 16 : texture.image[0].width || texture.image[0].image.width);
			} else {
				// Equirectangular
				this._setSize(texture.image.width / 4);
			}

			_oldTarget = this._renderer.getRenderTarget();

			const cubeUVRenderTarget = renderTarget || this._allocateTargets();

			this._textureToCubeUV(texture, cubeUVRenderTarget);

			this._applyPMREM(cubeUVRenderTarget);

			this._cleanup(cubeUVRenderTarget);

			return cubeUVRenderTarget;
		}

		_allocateTargets() {
			const width = 3 * Math.max(this._cubeSize, 16 * 7);
			const height = 4 * this._cubeSize;
			const params = {
				magFilter: LinearFilter,
				minFilter: LinearFilter,
				generateMipmaps: false,
				type: HalfFloatType,
				format: RGBAFormat,
				encoding: LinearEncoding,
				depthBuffer: false
			};

			const cubeUVRenderTarget = _createRenderTarget(width, height, params);

			if (this._pingPongRenderTarget === null || this._pingPongRenderTarget.width !== width) {
				if (this._pingPongRenderTarget !== null) {
					this._dispose();
				}

				this._pingPongRenderTarget = _createRenderTarget(width, height, params);
				const {
					_lodMax
				} = this;
				({
					sizeLods: this._sizeLods,
					lodPlanes: this._lodPlanes,
					sigmas: this._sigmas
				} = _createPlanes(_lodMax));
				this._blurMaterial = _getBlurShader(_lodMax, width, height);
			}

			return cubeUVRenderTarget;
		}

		_compileMaterial(material) {
			const tmpMesh = new Mesh(this._lodPlanes[0], material);

			this._renderer.compile(tmpMesh, _flatCamera);
		}

		_sceneToCubeUV(scene, near, far, cubeUVRenderTarget) {
			const fov = 90;
			const aspect = 1;
			const cubeCamera = new PerspectiveCamera(fov, aspect, near, far);
			const upSign = [1, -1, 1, 1, 1, 1];
			const forwardSign = [1, 1, 1, -1, -1, -1];
			const renderer = this._renderer;
			const originalAutoClear = renderer.autoClear;
			const toneMapping = renderer.toneMapping;
			renderer.getClearColor(_clearColor);
			renderer.toneMapping = NoToneMapping;
			renderer.autoClear = false;
			const backgroundMaterial = new MeshBasicMaterial({
				name: 'PMREM.Background',
				side: BackSide,
				depthWrite: false,
				depthTest: false
			});
			const backgroundBox = new Mesh(new BoxGeometry(), backgroundMaterial);
			let useSolidColor = false;
			const background = scene.background;

			if (background) {
				if (background.isColor) {
					backgroundMaterial.color.copy(background);
					scene.background = null;
					useSolidColor = true;
				}
			} else {
				backgroundMaterial.color.copy(_clearColor);
				useSolidColor = true;
			}

			for (let i = 0; i < 6; i++) {
				const col = i % 3;

				if (col === 0) {
					cubeCamera.up.set(0, upSign[i], 0);
					cubeCamera.lookAt(forwardSign[i], 0, 0);
				} else if (col === 1) {
					cubeCamera.up.set(0, 0, upSign[i]);
					cubeCamera.lookAt(0, forwardSign[i], 0);
				} else {
					cubeCamera.up.set(0, upSign[i], 0);
					cubeCamera.lookAt(0, 0, forwardSign[i]);
				}

				const size = this._cubeSize;

				_setViewport(cubeUVRenderTarget, col * size, i > 2 ? size : 0, size, size);

				renderer.setRenderTarget(cubeUVRenderTarget);

				if (useSolidColor) {
					renderer.render(backgroundBox, cubeCamera);
				}

				renderer.render(scene, cubeCamera);
			}

			backgroundBox.geometry.dispose();
			backgroundBox.material.dispose();
			renderer.toneMapping = toneMapping;
			renderer.autoClear = originalAutoClear;
			scene.background = background;
		}

		_textureToCubeUV(texture, cubeUVRenderTarget) {
			const renderer = this._renderer;
			const isCubeTexture = texture.mapping === CubeReflectionMapping || texture.mapping === CubeRefractionMapping;

			if (isCubeTexture) {
				if (this._cubemapMaterial === null) {
					this._cubemapMaterial = _getCubemapMaterial();
				}

				this._cubemapMaterial.uniforms.flipEnvMap.value = texture.isRenderTargetTexture === false ? -1 : 1;
			} else {
				if (this._equirectMaterial === null) {
					this._equirectMaterial = _getEquirectMaterial();
				}
			}

			const material = isCubeTexture ? this._cubemapMaterial : this._equirectMaterial;
			const mesh = new Mesh(this._lodPlanes[0], material);
			const uniforms = material.uniforms;
			uniforms['envMap'].value = texture;
			const size = this._cubeSize;

			_setViewport(cubeUVRenderTarget, 0, 0, 3 * size, 2 * size);

			renderer.setRenderTarget(cubeUVRenderTarget);
			renderer.render(mesh, _flatCamera);
		}

		_applyPMREM(cubeUVRenderTarget) {
			const renderer = this._renderer;
			const autoClear = renderer.autoClear;
			renderer.autoClear = false;

			for (let i = 1; i < this._lodPlanes.length; i++) {
				const sigma = Math.sqrt(this._sigmas[i] * this._sigmas[i] - this._sigmas[i - 1] * this._sigmas[i - 1]);
				const poleAxis = _axisDirections[(i - 1) % _axisDirections.length];

				this._blur(cubeUVRenderTarget, i - 1, i, sigma, poleAxis);
			}

			renderer.autoClear = autoClear;
		}
		/**
		 * This is a two-pass Gaussian blur for a cubemap. Normally this is done
		 * vertically and horizontally, but this breaks down on a cube. Here we apply
		 * the blur latitudinally (around the poles), and then longitudinally (towards
		 * the poles) to approximate the orthogonally-separable blur. It is least
		 * accurate at the poles, but still does a decent job.
		 */


		_blur(cubeUVRenderTarget, lodIn, lodOut, sigma, poleAxis) {
			const pingPongRenderTarget = this._pingPongRenderTarget;

			this._halfBlur(cubeUVRenderTarget, pingPongRenderTarget, lodIn, lodOut, sigma, 'latitudinal', poleAxis);

			this._halfBlur(pingPongRenderTarget, cubeUVRenderTarget, lodOut, lodOut, sigma, 'longitudinal', poleAxis);
		}

		_halfBlur(targetIn, targetOut, lodIn, lodOut, sigmaRadians, direction, poleAxis) {
			const renderer = this._renderer;
			const blurMaterial = this._blurMaterial;

			if (direction !== 'latitudinal' && direction !== 'longitudinal') {
				console.error('blur direction must be either latitudinal or longitudinal!');
			} // Number of standard deviations at which to cut off the discrete approximation.


			const STANDARD_DEVIATIONS = 3;
			const blurMesh = new Mesh(this._lodPlanes[lodOut], blurMaterial);
			const blurUniforms = blurMaterial.uniforms;
			const pixels = this._sizeLods[lodIn] - 1;
			const radiansPerPixel = isFinite(sigmaRadians) ? Math.PI / (2 * pixels) : 2 * Math.PI / (2 * MAX_SAMPLES - 1);
			const sigmaPixels = sigmaRadians / radiansPerPixel;
			const samples = isFinite(sigmaRadians) ? 1 + Math.floor(STANDARD_DEVIATIONS * sigmaPixels) : MAX_SAMPLES;

			if (samples > MAX_SAMPLES) {
				console.warn(`sigmaRadians, ${sigmaRadians}, is too large and will clip, as it requested ${samples} samples when the maximum is set to ${MAX_SAMPLES}`);
			}

			const weights = [];
			let sum = 0;

			for (let i = 0; i < MAX_SAMPLES; ++i) {
				const x = i / sigmaPixels;
				const weight = Math.exp(-x * x / 2);
				weights.push(weight);

				if (i === 0) {
					sum += weight;
				} else if (i < samples) {
					sum += 2 * weight;
				}
			}

			for (let i = 0; i < weights.length; i++) {
				weights[i] = weights[i] / sum;
			}

			blurUniforms['envMap'].value = targetIn.texture;
			blurUniforms['samples'].value = samples;
			blurUniforms['weights'].value = weights;
			blurUniforms['latitudinal'].value = direction === 'latitudinal';

			if (poleAxis) {
				blurUniforms['poleAxis'].value = poleAxis;
			}

			const {
				_lodMax
			} = this;
			blurUniforms['dTheta'].value = radiansPerPixel;
			blurUniforms['mipInt'].value = _lodMax - lodIn;
			const outputSize = this._sizeLods[lodOut];
			const x = 3 * outputSize * (lodOut > _lodMax - LOD_MIN ? lodOut - _lodMax + LOD_MIN : 0);
			const y = 4 * (this._cubeSize - outputSize);

			_setViewport(targetOut, x, y, 3 * outputSize, 2 * outputSize);

			renderer.setRenderTarget(targetOut);
			renderer.render(blurMesh, _flatCamera);
		}

	}

	function _createPlanes(lodMax) {
		const lodPlanes = [];
		const sizeLods = [];
		const sigmas = [];
		let lod = lodMax;
		const totalLods = lodMax - LOD_MIN + 1 + EXTRA_LOD_SIGMA.length;

		for (let i = 0; i < totalLods; i++) {
			const sizeLod = Math.pow(2, lod);
			sizeLods.push(sizeLod);
			let sigma = 1.0 / sizeLod;

			if (i > lodMax - LOD_MIN) {
				sigma = EXTRA_LOD_SIGMA[i - lodMax + LOD_MIN - 1];
			} else if (i === 0) {
				sigma = 0;
			}

			sigmas.push(sigma);
			const texelSize = 1.0 / (sizeLod - 2);
			const min = -texelSize;
			const max = 1 + texelSize;
			const uv1 = [min, min, max, min, max, max, min, min, max, max, min, max];
			const cubeFaces = 6;
			const vertices = 6;
			const positionSize = 3;
			const uvSize = 2;
			const faceIndexSize = 1;
			const position = new Float32Array(positionSize * vertices * cubeFaces);
			const uv = new Float32Array(uvSize * vertices * cubeFaces);
			const faceIndex = new Float32Array(faceIndexSize * vertices * cubeFaces);

			for (let face = 0; face < cubeFaces; face++) {
				const x = face % 3 * 2 / 3 - 1;
				const y = face > 2 ? 0 : -1;
				const coordinates = [x, y, 0, x + 2 / 3, y, 0, x + 2 / 3, y + 1, 0, x, y, 0, x + 2 / 3, y + 1, 0, x, y + 1, 0];
				position.set(coordinates, positionSize * vertices * face);
				uv.set(uv1, uvSize * vertices * face);
				const fill = [face, face, face, face, face, face];
				faceIndex.set(fill, faceIndexSize * vertices * face);
			}

			const planes = new BufferGeometry();
			planes.setAttribute('position', new BufferAttribute(position, positionSize));
			planes.setAttribute('uv', new BufferAttribute(uv, uvSize));
			planes.setAttribute('faceIndex', new BufferAttribute(faceIndex, faceIndexSize));
			lodPlanes.push(planes);

			if (lod > LOD_MIN) {
				lod--;
			}
		}

		return {
			lodPlanes,
			sizeLods,
			sigmas
		};
	}

	function _createRenderTarget(width, height, params) {
		const cubeUVRenderTarget = new WebGLRenderTarget(width, height, params);
		cubeUVRenderTarget.texture.mapping = CubeUVReflectionMapping;
		cubeUVRenderTarget.texture.name = 'PMREM.cubeUv';
		cubeUVRenderTarget.scissorTest = true;
		return cubeUVRenderTarget;
	}

	function _setViewport(target, x, y, width, height) {
		target.viewport.set(x, y, width, height);
		target.scissor.set(x, y, width, height);
	}

	function _getBlurShader(lodMax, width, height) {
		const weights = new Float32Array(MAX_SAMPLES);
		const poleAxis = new Vector3(0, 1, 0);
		const shaderMaterial = new ShaderMaterial({
			name: 'SphericalGaussianBlur',
			defines: {
				'n': MAX_SAMPLES,
				'CUBEUV_TEXEL_WIDTH': 1.0 / width,
				'CUBEUV_TEXEL_HEIGHT': 1.0 / height,
				'CUBEUV_MAX_MIP': `${lodMax}.0`
			},
			uniforms: {
				'envMap': {
					value: null
				},
				'samples': {
					value: 1
				},
				'weights': {
					value: weights
				},
				'latitudinal': {
					value: false
				},
				'dTheta': {
					value: 0
				},
				'mipInt': {
					value: 0
				},
				'poleAxis': {
					value: poleAxis
				}
			},
			vertexShader: _getCommonVertexShader(),
			fragmentShader:
			/* glsl */
			`

			precision mediump float;
			precision mediump int;

			varying vec3 vOutputDirection;

			uniform sampler2D envMap;
			uniform int samples;
			uniform float weights[ n ];
			uniform bool latitudinal;
			uniform float dTheta;
			uniform float mipInt;
			uniform vec3 poleAxis;

			#define ENVMAP_TYPE_CUBE_UV
			#include <cube_uv_reflection_fragment>

			vec3 getSample( float theta, vec3 axis ) {

				float cosTheta = cos( theta );
				// Rodrigues' axis-angle rotation
				vec3 sampleDirection = vOutputDirection * cosTheta
					+ cross( axis, vOutputDirection ) * sin( theta )
					+ axis * dot( axis, vOutputDirection ) * ( 1.0 - cosTheta );

				return bilinearCubeUV( envMap, sampleDirection, mipInt );

			}

			void main() {

				vec3 axis = latitudinal ? poleAxis : cross( poleAxis, vOutputDirection );

				if ( all( equal( axis, vec3( 0.0 ) ) ) ) {

					axis = vec3( vOutputDirection.z, 0.0, - vOutputDirection.x );

				}

				axis = normalize( axis );

				gl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );
				gl_FragColor.rgb += weights[ 0 ] * getSample( 0.0, axis );

				for ( int i = 1; i < n; i++ ) {

					if ( i >= samples ) {

						break;

					}

					float theta = dTheta * float( i );
					gl_FragColor.rgb += weights[ i ] * getSample( -1.0 * theta, axis );
					gl_FragColor.rgb += weights[ i ] * getSample( theta, axis );

				}

			}
		`,
			blending: NoBlending,
			depthTest: false,
			depthWrite: false
		});
		return shaderMaterial;
	}

	function _getEquirectMaterial() {
		return new ShaderMaterial({
			name: 'EquirectangularToCubeUV',
			uniforms: {
				'envMap': {
					value: null
				}
			},
			vertexShader: _getCommonVertexShader(),
			fragmentShader:
			/* glsl */
			`

			precision mediump float;
			precision mediump int;

			varying vec3 vOutputDirection;

			uniform sampler2D envMap;

			#include <common>

			void main() {

				vec3 outputDirection = normalize( vOutputDirection );
				vec2 uv = equirectUv( outputDirection );

				gl_FragColor = vec4( texture2D ( envMap, uv ).rgb, 1.0 );

			}
		`,
			blending: NoBlending,
			depthTest: false,
			depthWrite: false
		});
	}

	function _getCubemapMaterial() {
		return new ShaderMaterial({
			name: 'CubemapToCubeUV',
			uniforms: {
				'envMap': {
					value: null
				},
				'flipEnvMap': {
					value: -1
				}
			},
			vertexShader: _getCommonVertexShader(),
			fragmentShader:
			/* glsl */
			`

			precision mediump float;
			precision mediump int;

			uniform float flipEnvMap;

			varying vec3 vOutputDirection;

			uniform samplerCube envMap;

			void main() {

				gl_FragColor = textureCube( envMap, vec3( flipEnvMap * vOutputDirection.x, vOutputDirection.yz ) );

			}
		`,
			blending: NoBlending,
			depthTest: false,
			depthWrite: false
		});
	}

	function _getCommonVertexShader() {
		return (
			/* glsl */
			`

		precision mediump float;
		precision mediump int;

		attribute float faceIndex;

		varying vec3 vOutputDirection;

		// RH coordinate system; PMREM face-indexing convention
		vec3 getDirection( vec2 uv, float face ) {

			uv = 2.0 * uv - 1.0;

			vec3 direction = vec3( uv, 1.0 );

			if ( face == 0.0 ) {

				direction = direction.zyx; // ( 1, v, u ) pos x

			} else if ( face == 1.0 ) {

				direction = direction.xzy;
				direction.xz *= -1.0; // ( -u, 1, -v ) pos y

			} else if ( face == 2.0 ) {

				direction.x *= -1.0; // ( -u, v, 1 ) pos z

			} else if ( face == 3.0 ) {

				direction = direction.zyx;
				direction.xz *= -1.0; // ( -1, v, -u ) neg x

			} else if ( face == 4.0 ) {

				direction = direction.xzy;
				direction.xy *= -1.0; // ( -u, -1, v ) neg y

			} else if ( face == 5.0 ) {

				direction.z *= -1.0; // ( u, v, -1 ) neg z

			}

			return direction;

		}

		void main() {

			vOutputDirection = getDirection( uv, faceIndex );
			gl_Position = vec4( position, 1.0 );

		}
	`
		);
	}

	function WebGLCubeUVMaps(renderer) {
		let cubeUVmaps = new WeakMap();
		let pmremGenerator = null;

		function get(texture) {
			if (texture && texture.isTexture) {
				const mapping = texture.mapping;
				const isEquirectMap = mapping === EquirectangularReflectionMapping || mapping === EquirectangularRefractionMapping;
				const isCubeMap = mapping === CubeReflectionMapping || mapping === CubeRefractionMapping; // equirect/cube map to cubeUV conversion

				if (isEquirectMap || isCubeMap) {
					if (texture.isRenderTargetTexture && texture.needsPMREMUpdate === true) {
						texture.needsPMREMUpdate = false;
						let renderTarget = cubeUVmaps.get(texture);
						if (pmremGenerator === null) pmremGenerator = new PMREMGenerator(renderer);
						renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular(texture, renderTarget) : pmremGenerator.fromCubemap(texture, renderTarget);
						cubeUVmaps.set(texture, renderTarget);
						return renderTarget.texture;
					} else {
						if (cubeUVmaps.has(texture)) {
							return cubeUVmaps.get(texture).texture;
						} else {
							const image = texture.image;

							if (isEquirectMap && image && image.height > 0 || isCubeMap && image && isCubeTextureComplete(image)) {
								if (pmremGenerator === null) pmremGenerator = new PMREMGenerator(renderer);
								const renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular(texture) : pmremGenerator.fromCubemap(texture);
								cubeUVmaps.set(texture, renderTarget);
								texture.addEventListener('dispose', onTextureDispose);
								return renderTarget.texture;
							} else {
								// image not yet ready. try the conversion next frame
								return null;
							}
						}
					}
				}
			}

			return texture;
		}

		function isCubeTextureComplete(image) {
			let count = 0;
			const length = 6;

			for (let i = 0; i < length; i++) {
				if (image[i] !== undefined) count++;
			}

			return count === length;
		}

		function onTextureDispose(event) {
			const texture = event.target;
			texture.removeEventListener('dispose', onTextureDispose);
			const cubemapUV = cubeUVmaps.get(texture);

			if (cubemapUV !== undefined) {
				cubeUVmaps.delete(texture);
				cubemapUV.dispose();
			}
		}

		function dispose() {
			cubeUVmaps = new WeakMap();

			if (pmremGenerator !== null) {
				pmremGenerator.dispose();
				pmremGenerator = null;
			}
		}

		return {
			get: get,
			dispose: dispose
		};
	}

	function WebGLExtensions(gl) {
		const extensions = {};

		function getExtension(name) {
			if (extensions[name] !== undefined) {
				return extensions[name];
			}

			let extension;

			switch (name) {
				case 'WEBGL_depth_texture':
					extension = gl.getExtension('WEBGL_depth_texture') || gl.getExtension('MOZ_WEBGL_depth_texture') || gl.getExtension('WEBKIT_WEBGL_depth_texture');
					break;

				case 'EXT_texture_filter_anisotropic':
					extension = gl.getExtension('EXT_texture_filter_anisotropic') || gl.getExtension('MOZ_EXT_texture_filter_anisotropic') || gl.getExtension('WEBKIT_EXT_texture_filter_anisotropic');
					break;

				case 'WEBGL_compressed_texture_s3tc':
					extension = gl.getExtension('WEBGL_compressed_texture_s3tc') || gl.getExtension('MOZ_WEBGL_compressed_texture_s3tc') || gl.getExtension('WEBKIT_WEBGL_compressed_texture_s3tc');
					break;

				case 'WEBGL_compressed_texture_pvrtc':
					extension = gl.getExtension('WEBGL_compressed_texture_pvrtc') || gl.getExtension('WEBKIT_WEBGL_compressed_texture_pvrtc');
					break;

				default:
					extension = gl.getExtension(name);
			}

			extensions[name] = extension;
			return extension;
		}

		return {
			has: function (name) {
				return getExtension(name) !== null;
			},
			init: function (capabilities) {
				if (capabilities.isWebGL2) {
					getExtension('EXT_color_buffer_float');
				} else {
					getExtension('WEBGL_depth_texture');
					getExtension('OES_texture_float');
					getExtension('OES_texture_half_float');
					getExtension('OES_texture_half_float_linear');
					getExtension('OES_standard_derivatives');
					getExtension('OES_element_index_uint');
					getExtension('OES_vertex_array_object');
					getExtension('ANGLE_instanced_arrays');
				}

				getExtension('OES_texture_float_linear');
				getExtension('EXT_color_buffer_half_float');
				getExtension('WEBGL_multisampled_render_to_texture');
			},
			get: function (name) {
				const extension = getExtension(name);

				if (extension === null) {
					console.warn('THREE.WebGLRenderer: ' + name + ' extension not supported.');
				}

				return extension;
			}
		};
	}

	function WebGLGeometries(gl, attributes, info, bindingStates) {
		const geometries = {};
		const wireframeAttributes = new WeakMap();

		function onGeometryDispose(event) {
			const geometry = event.target;

			if (geometry.index !== null) {
				attributes.remove(geometry.index);
			}

			for (const name in geometry.attributes) {
				attributes.remove(geometry.attributes[name]);
			}

			geometry.removeEventListener('dispose', onGeometryDispose);
			delete geometries[geometry.id];
			const attribute = wireframeAttributes.get(geometry);

			if (attribute) {
				attributes.remove(attribute);
				wireframeAttributes.delete(geometry);
			}

			bindingStates.releaseStatesOfGeometry(geometry);

			if (geometry.isInstancedBufferGeometry === true) {
				delete geometry._maxInstanceCount;
			} //


			info.memory.geometries--;
		}

		function get(object, geometry) {
			if (geometries[geometry.id] === true) return geometry;
			geometry.addEventListener('dispose', onGeometryDispose);
			geometries[geometry.id] = true;
			info.memory.geometries++;
			return geometry;
		}

		function update(geometry) {
			const geometryAttributes = geometry.attributes; // Updating index buffer in VAO now. See WebGLBindingStates.

			for (const name in geometryAttributes) {
				attributes.update(geometryAttributes[name], gl.ARRAY_BUFFER);
			} // morph targets


			const morphAttributes = geometry.morphAttributes;

			for (const name in morphAttributes) {
				const array = morphAttributes[name];

				for (let i = 0, l = array.length; i < l; i++) {
					attributes.update(array[i], gl.ARRAY_BUFFER);
				}
			}
		}

		function updateWireframeAttribute(geometry) {
			const indices = [];
			const geometryIndex = geometry.index;
			const geometryPosition = geometry.attributes.position;
			let version = 0;

			if (geometryIndex !== null) {
				const array = geometryIndex.array;
				version = geometryIndex.version;

				for (let i = 0, l = array.length; i < l; i += 3) {
					const a = array[i + 0];
					const b = array[i + 1];
					const c = array[i + 2];
					indices.push(a, b, b, c, c, a);
				}
			} else {
				const array = geometryPosition.array;
				version = geometryPosition.version;

				for (let i = 0, l = array.length / 3 - 1; i < l; i += 3) {
					const a = i + 0;
					const b = i + 1;
					const c = i + 2;
					indices.push(a, b, b, c, c, a);
				}
			}

			const attribute = new (arrayNeedsUint32(indices) ? Uint32BufferAttribute : Uint16BufferAttribute)(indices, 1);
			attribute.version = version; // Updating index buffer in VAO now. See WebGLBindingStates
			//

			const previousAttribute = wireframeAttributes.get(geometry);
			if (previousAttribute) attributes.remove(previousAttribute); //

			wireframeAttributes.set(geometry, attribute);
		}

		function getWireframeAttribute(geometry) {
			const currentAttribute = wireframeAttributes.get(geometry);

			if (currentAttribute) {
				const geometryIndex = geometry.index;

				if (geometryIndex !== null) {
					// if the attribute is obsolete, create a new one
					if (currentAttribute.version < geometryIndex.version) {
						updateWireframeAttribute(geometry);
					}
				}
			} else {
				updateWireframeAttribute(geometry);
			}

			return wireframeAttributes.get(geometry);
		}

		return {
			get: get,
			update: update,
			getWireframeAttribute: getWireframeAttribute
		};
	}

	function WebGLIndexedBufferRenderer(gl, extensions, info, capabilities) {
		const isWebGL2 = capabilities.isWebGL2;
		let mode;

		function setMode(value) {
			mode = value;
		}

		let type, bytesPerElement;

		function setIndex(value) {
			type = value.type;
			bytesPerElement = value.bytesPerElement;
		}

		function render(start, count) {
			gl.drawElements(mode, count, type, start * bytesPerElement);
			info.update(count, mode, 1);
		}

		function renderInstances(start, count, primcount) {
			if (primcount === 0) return;
			let extension, methodName;

			if (isWebGL2) {
				extension = gl;
				methodName = 'drawElementsInstanced';
			} else {
				extension = extensions.get('ANGLE_instanced_arrays');
				methodName = 'drawElementsInstancedANGLE';

				if (extension === null) {
					console.error('THREE.WebGLIndexedBufferRenderer: using THREE.InstancedBufferGeometry but hardware does not support extension ANGLE_instanced_arrays.');
					return;
				}
			}

			extension[methodName](mode, count, type, start * bytesPerElement, primcount);
			info.update(count, mode, primcount);
		} //


		this.setMode = setMode;
		this.setIndex = setIndex;
		this.render = render;
		this.renderInstances = renderInstances;
	}

	function WebGLInfo(gl) {
		const memory = {
			geometries: 0,
			textures: 0
		};
		const render = {
			frame: 0,
			calls: 0,
			triangles: 0,
			points: 0,
			lines: 0
		};

		function update(count, mode, instanceCount) {
			render.calls++;

			switch (mode) {
				case gl.TRIANGLES:
					render.triangles += instanceCount * (count / 3);
					break;

				case gl.LINES:
					render.lines += instanceCount * (count / 2);
					break;

				case gl.LINE_STRIP:
					render.lines += instanceCount * (count - 1);
					break;

				case gl.LINE_LOOP:
					render.lines += instanceCount * count;
					break;

				case gl.POINTS:
					render.points += instanceCount * count;
					break;

				default:
					console.error('THREE.WebGLInfo: Unknown draw mode:', mode);
					break;
			}
		}

		function reset() {
			render.frame++;
			render.calls = 0;
			render.triangles = 0;
			render.points = 0;
			render.lines = 0;
		}

		return {
			memory: memory,
			render: render,
			programs: null,
			autoReset: true,
			reset: reset,
			update: update
		};
	}

	function numericalSort(a, b) {
		return a[0] - b[0];
	}

	function absNumericalSort(a, b) {
		return Math.abs(b[1]) - Math.abs(a[1]);
	}

	function denormalize(morph, attribute) {
		let denominator = 1;
		const array = attribute.isInterleavedBufferAttribute ? attribute.data.array : attribute.array;
		if (array instanceof Int8Array) denominator = 127;else if (array instanceof Uint8Array) denominator = 255;else if (array instanceof Uint16Array) denominator = 65535;else if (array instanceof Int16Array) denominator = 32767;else if (array instanceof Int32Array) denominator = 2147483647;else console.error('THREE.WebGLMorphtargets: Unsupported morph attribute data type: ', array);
		morph.divideScalar(denominator);
	}

	function WebGLMorphtargets(gl, capabilities, textures) {
		const influencesList = {};
		const morphInfluences = new Float32Array(8);
		const morphTextures = new WeakMap();
		const morph = new Vector4();
		const workInfluences = [];

		for (let i = 0; i < 8; i++) {
			workInfluences[i] = [i, 0];
		}

		function update(object, geometry, material, program) {
			const objectInfluences = object.morphTargetInfluences;

			if (capabilities.isWebGL2 === true) {
				// instead of using attributes, the WebGL 2 code path encodes morph targets
				// into an array of data textures. Each layer represents a single morph target.
				const morphAttribute = geometry.morphAttributes.position || geometry.morphAttributes.normal || geometry.morphAttributes.color;
				const morphTargetsCount = morphAttribute !== undefined ? morphAttribute.length : 0;
				let entry = morphTextures.get(geometry);

				if (entry === undefined || entry.count !== morphTargetsCount) {
					if (entry !== undefined) entry.texture.dispose();
					const hasMorphPosition = geometry.morphAttributes.position !== undefined;
					const hasMorphNormals = geometry.morphAttributes.normal !== undefined;
					const hasMorphColors = geometry.morphAttributes.color !== undefined;
					const morphTargets = geometry.morphAttributes.position || [];
					const morphNormals = geometry.morphAttributes.normal || [];
					const morphColors = geometry.morphAttributes.color || [];
					let vertexDataCount = 0;
					if (hasMorphPosition === true) vertexDataCount = 1;
					if (hasMorphNormals === true) vertexDataCount = 2;
					if (hasMorphColors === true) vertexDataCount = 3;
					let width = geometry.attributes.position.count * vertexDataCount;
					let height = 1;

					if (width > capabilities.maxTextureSize) {
						height = Math.ceil(width / capabilities.maxTextureSize);
						width = capabilities.maxTextureSize;
					}

					const buffer = new Float32Array(width * height * 4 * morphTargetsCount);
					const texture = new DataArrayTexture(buffer, width, height, morphTargetsCount);
					texture.type = FloatType;
					texture.needsUpdate = true; // fill buffer

					const vertexDataStride = vertexDataCount * 4;

					for (let i = 0; i < morphTargetsCount; i++) {
						const morphTarget = morphTargets[i];
						const morphNormal = morphNormals[i];
						const morphColor = morphColors[i];
						const offset = width * height * 4 * i;

						for (let j = 0; j < morphTarget.count; j++) {
							const stride = j * vertexDataStride;

							if (hasMorphPosition === true) {
								morph.fromBufferAttribute(morphTarget, j);
								if (morphTarget.normalized === true) denormalize(morph, morphTarget);
								buffer[offset + stride + 0] = morph.x;
								buffer[offset + stride + 1] = morph.y;
								buffer[offset + stride + 2] = morph.z;
								buffer[offset + stride + 3] = 0;
							}

							if (hasMorphNormals === true) {
								morph.fromBufferAttribute(morphNormal, j);
								if (morphNormal.normalized === true) denormalize(morph, morphNormal);
								buffer[offset + stride + 4] = morph.x;
								buffer[offset + stride + 5] = morph.y;
								buffer[offset + stride + 6] = morph.z;
								buffer[offset + stride + 7] = 0;
							}

							if (hasMorphColors === true) {
								morph.fromBufferAttribute(morphColor, j);
								if (morphColor.normalized === true) denormalize(morph, morphColor);
								buffer[offset + stride + 8] = morph.x;
								buffer[offset + stride + 9] = morph.y;
								buffer[offset + stride + 10] = morph.z;
								buffer[offset + stride + 11] = morphColor.itemSize === 4 ? morph.w : 1;
							}
						}
					}

					entry = {
						count: morphTargetsCount,
						texture: texture,
						size: new Vector2(width, height)
					};
					morphTextures.set(geometry, entry);

					function disposeTexture() {
						texture.dispose();
						morphTextures.delete(geometry);
						geometry.removeEventListener('dispose', disposeTexture);
					}

					geometry.addEventListener('dispose', disposeTexture);
				} //


				let morphInfluencesSum = 0;

				for (let i = 0; i < objectInfluences.length; i++) {
					morphInfluencesSum += objectInfluences[i];
				}

				const morphBaseInfluence = geometry.morphTargetsRelative ? 1 : 1 - morphInfluencesSum;
				program.getUniforms().setValue(gl, 'morphTargetBaseInfluence', morphBaseInfluence);
				program.getUniforms().setValue(gl, 'morphTargetInfluences', objectInfluences);
				program.getUniforms().setValue(gl, 'morphTargetsTexture', entry.texture, textures);
				program.getUniforms().setValue(gl, 'morphTargetsTextureSize', entry.size);
			} else {
				// When object doesn't have morph target influences defined, we treat it as a 0-length array
				// This is important to make sure we set up morphTargetBaseInfluence / morphTargetInfluences
				const length = objectInfluences === undefined ? 0 : objectInfluences.length;
				let influences = influencesList[geometry.id];

				if (influences === undefined || influences.length !== length) {
					// initialise list
					influences = [];

					for (let i = 0; i < length; i++) {
						influences[i] = [i, 0];
					}

					influencesList[geometry.id] = influences;
				} // Collect influences


				for (let i = 0; i < length; i++) {
					const influence = influences[i];
					influence[0] = i;
					influence[1] = objectInfluences[i];
				}

				influences.sort(absNumericalSort);

				for (let i = 0; i < 8; i++) {
					if (i < length && influences[i][1]) {
						workInfluences[i][0] = influences[i][0];
						workInfluences[i][1] = influences[i][1];
					} else {
						workInfluences[i][0] = Number.MAX_SAFE_INTEGER;
						workInfluences[i][1] = 0;
					}
				}

				workInfluences.sort(numericalSort);
				const morphTargets = geometry.morphAttributes.position;
				const morphNormals = geometry.morphAttributes.normal;
				let morphInfluencesSum = 0;

				for (let i = 0; i < 8; i++) {
					const influence = workInfluences[i];
					const index = influence[0];
					const value = influence[1];

					if (index !== Number.MAX_SAFE_INTEGER && value) {
						if (morphTargets && geometry.getAttribute('morphTarget' + i) !== morphTargets[index]) {
							geometry.setAttribute('morphTarget' + i, morphTargets[index]);
						}

						if (morphNormals && geometry.getAttribute('morphNormal' + i) !== morphNormals[index]) {
							geometry.setAttribute('morphNormal' + i, morphNormals[index]);
						}

						morphInfluences[i] = value;
						morphInfluencesSum += value;
					} else {
						if (morphTargets && geometry.hasAttribute('morphTarget' + i) === true) {
							geometry.deleteAttribute('morphTarget' + i);
						}

						if (morphNormals && geometry.hasAttribute('morphNormal' + i) === true) {
							geometry.deleteAttribute('morphNormal' + i);
						}

						morphInfluences[i] = 0;
					}
				} // GLSL shader uses formula baseinfluence * base + sum(target * influence)
				// This allows us to switch between absolute morphs and relative morphs without changing shader code
				// When baseinfluence = 1 - sum(influence), the above is equivalent to sum((target - base) * influence)


				const morphBaseInfluence = geometry.morphTargetsRelative ? 1 : 1 - morphInfluencesSum;
				program.getUniforms().setValue(gl, 'morphTargetBaseInfluence', morphBaseInfluence);
				program.getUniforms().setValue(gl, 'morphTargetInfluences', morphInfluences);
			}
		}

		return {
			update: update
		};
	}

	function WebGLObjects(gl, geometries, attributes, info) {
		let updateMap = new WeakMap();

		function update(object) {
			const frame = info.render.frame;
			const geometry = object.geometry;
			const buffergeometry = geometries.get(object, geometry); // Update once per frame

			if (updateMap.get(buffergeometry) !== frame) {
				geometries.update(buffergeometry);
				updateMap.set(buffergeometry, frame);
			}

			if (object.isInstancedMesh) {
				if (object.hasEventListener('dispose', onInstancedMeshDispose) === false) {
					object.addEventListener('dispose', onInstancedMeshDispose);
				}

				attributes.update(object.instanceMatrix, gl.ARRAY_BUFFER);

				if (object.instanceColor !== null) {
					attributes.update(object.instanceColor, gl.ARRAY_BUFFER);
				}
			}

			return buffergeometry;
		}

		function dispose() {
			updateMap = new WeakMap();
		}

		function onInstancedMeshDispose(event) {
			const instancedMesh = event.target;
			instancedMesh.removeEventListener('dispose', onInstancedMeshDispose);
			attributes.remove(instancedMesh.instanceMatrix);
			if (instancedMesh.instanceColor !== null) attributes.remove(instancedMesh.instanceColor);
		}

		return {
			update: update,
			dispose: dispose
		};
	}

	/**
	 * Uniforms of a program.
	 * Those form a tree structure with a special top-level container for the root,
	 * which you get by calling 'new WebGLUniforms( gl, program )'.
	 *
	 *
	 * Properties of inner nodes including the top-level container:
	 *
	 * .seq - array of nested uniforms
	 * .map - nested uniforms by name
	 *
	 *
	 * Methods of all nodes except the top-level container:
	 *
	 * .setValue( gl, value, [textures] )
	 *
	 * 		uploads a uniform value(s)
	 *		the 'textures' parameter is needed for sampler uniforms
	 *
	 *
	 * Static methods of the top-level container (textures factorizations):
	 *
	 * .upload( gl, seq, values, textures )
	 *
	 * 		sets uniforms in 'seq' to 'values[id].value'
	 *
	 * .seqWithValue( seq, values ) : filteredSeq
	 *
	 * 		filters 'seq' entries with corresponding entry in values
	 *
	 *
	 * Methods of the top-level container (textures factorizations):
	 *
	 * .setValue( gl, name, value, textures )
	 *
	 * 		sets uniform with	name 'name' to 'value'
	 *
	 * .setOptional( gl, obj, prop )
	 *
	 * 		like .set for an optional property of the object
	 *
	 */
	const emptyTexture = /*@__PURE__*/new Texture();
	const emptyArrayTexture = /*@__PURE__*/new DataArrayTexture();
	const empty3dTexture = /*@__PURE__*/new Data3DTexture();
	const emptyCubeTexture = /*@__PURE__*/new CubeTexture(); // --- Utilities ---
	// Array Caches (provide typed arrays for temporary by size)

	const arrayCacheF32 = [];
	const arrayCacheI32 = []; // Float32Array caches used for uploading Matrix uniforms

	const mat4array = new Float32Array(16);
	const mat3array = new Float32Array(9);
	const mat2array = new Float32Array(4); // Flattening for arrays of vectors and matrices

	function flatten(array, nBlocks, blockSize) {
		const firstElem = array[0];
		if (firstElem <= 0 || firstElem > 0) return array; // unoptimized: ! isNaN( firstElem )
		// see http://jacksondunstan.com/articles/983

		const n = nBlocks * blockSize;
		let r = arrayCacheF32[n];

		if (r === undefined) {
			r = new Float32Array(n);
			arrayCacheF32[n] = r;
		}

		if (nBlocks !== 0) {
			firstElem.toArray(r, 0);

			for (let i = 1, offset = 0; i !== nBlocks; ++i) {
				offset += blockSize;
				array[i].toArray(r, offset);
			}
		}

		return r;
	}

	function arraysEqual(a, b) {
		if (a.length !== b.length) return false;

		for (let i = 0, l = a.length; i < l; i++) {
			if (a[i] !== b[i]) return false;
		}

		return true;
	}

	function copyArray(a, b) {
		for (let i = 0, l = b.length; i < l; i++) {
			a[i] = b[i];
		}
	} // Texture unit allocation


	function allocTexUnits(textures, n) {
		let r = arrayCacheI32[n];

		if (r === undefined) {
			r = new Int32Array(n);
			arrayCacheI32[n] = r;
		}

		for (let i = 0; i !== n; ++i) {
			r[i] = textures.allocateTextureUnit();
		}

		return r;
	} // --- Setters ---
	// Note: Defining these methods externally, because they come in a bunch
	// and this way their names minify.
	// Single scalar


	function setValueV1f(gl, v) {
		const cache = this.cache;
		if (cache[0] === v) return;
		gl.uniform1f(this.addr, v);
		cache[0] = v;
	} // Single float vector (from flat array or THREE.VectorN)


	function setValueV2f(gl, v) {
		const cache = this.cache;

		if (v.x !== undefined) {
			if (cache[0] !== v.x || cache[1] !== v.y) {
				gl.uniform2f(this.addr, v.x, v.y);
				cache[0] = v.x;
				cache[1] = v.y;
			}
		} else {
			if (arraysEqual(cache, v)) return;
			gl.uniform2fv(this.addr, v);
			copyArray(cache, v);
		}
	}

	function setValueV3f(gl, v) {
		const cache = this.cache;

		if (v.x !== undefined) {
			if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z) {
				gl.uniform3f(this.addr, v.x, v.y, v.z);
				cache[0] = v.x;
				cache[1] = v.y;
				cache[2] = v.z;
			}
		} else if (v.r !== undefined) {
			if (cache[0] !== v.r || cache[1] !== v.g || cache[2] !== v.b) {
				gl.uniform3f(this.addr, v.r, v.g, v.b);
				cache[0] = v.r;
				cache[1] = v.g;
				cache[2] = v.b;
			}
		} else {
			if (arraysEqual(cache, v)) return;
			gl.uniform3fv(this.addr, v);
			copyArray(cache, v);
		}
	}

	function setValueV4f(gl, v) {
		const cache = this.cache;

		if (v.x !== undefined) {
			if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z || cache[3] !== v.w) {
				gl.uniform4f(this.addr, v.x, v.y, v.z, v.w);
				cache[0] = v.x;
				cache[1] = v.y;
				cache[2] = v.z;
				cache[3] = v.w;
			}
		} else {
			if (arraysEqual(cache, v)) return;
			gl.uniform4fv(this.addr, v);
			copyArray(cache, v);
		}
	} // Single matrix (from flat array or THREE.MatrixN)


	function setValueM2(gl, v) {
		const cache = this.cache;
		const elements = v.elements;

		if (elements === undefined) {
			if (arraysEqual(cache, v)) return;
			gl.uniformMatrix2fv(this.addr, false, v);
			copyArray(cache, v);
		} else {
			if (arraysEqual(cache, elements)) return;
			mat2array.set(elements);
			gl.uniformMatrix2fv(this.addr, false, mat2array);
			copyArray(cache, elements);
		}
	}

	function setValueM3(gl, v) {
		const cache = this.cache;
		const elements = v.elements;

		if (elements === undefined) {
			if (arraysEqual(cache, v)) return;
			gl.uniformMatrix3fv(this.addr, false, v);
			copyArray(cache, v);
		} else {
			if (arraysEqual(cache, elements)) return;
			mat3array.set(elements);
			gl.uniformMatrix3fv(this.addr, false, mat3array);
			copyArray(cache, elements);
		}
	}

	function setValueM4(gl, v) {
		const cache = this.cache;
		const elements = v.elements;

		if (elements === undefined) {
			if (arraysEqual(cache, v)) return;
			gl.uniformMatrix4fv(this.addr, false, v);
			copyArray(cache, v);
		} else {
			if (arraysEqual(cache, elements)) return;
			mat4array.set(elements);
			gl.uniformMatrix4fv(this.addr, false, mat4array);
			copyArray(cache, elements);
		}
	} // Single integer / boolean


	function setValueV1i(gl, v) {
		const cache = this.cache;
		if (cache[0] === v) return;
		gl.uniform1i(this.addr, v);
		cache[0] = v;
	} // Single integer / boolean vector (from flat array)


	function setValueV2i(gl, v) {
		const cache = this.cache;
		if (arraysEqual(cache, v)) return;
		gl.uniform2iv(this.addr, v);
		copyArray(cache, v);
	}

	function setValueV3i(gl, v) {
		const cache = this.cache;
		if (arraysEqual(cache, v)) return;
		gl.uniform3iv(this.addr, v);
		copyArray(cache, v);
	}

	function setValueV4i(gl, v) {
		const cache = this.cache;
		if (arraysEqual(cache, v)) return;
		gl.uniform4iv(this.addr, v);
		copyArray(cache, v);
	} // Single unsigned integer


	function setValueV1ui(gl, v) {
		const cache = this.cache;
		if (cache[0] === v) return;
		gl.uniform1ui(this.addr, v);
		cache[0] = v;
	} // Single unsigned integer vector (from flat array)


	function setValueV2ui(gl, v) {
		const cache = this.cache;
		if (arraysEqual(cache, v)) return;
		gl.uniform2uiv(this.addr, v);
		copyArray(cache, v);
	}

	function setValueV3ui(gl, v) {
		const cache = this.cache;
		if (arraysEqual(cache, v)) return;
		gl.uniform3uiv(this.addr, v);
		copyArray(cache, v);
	}

	function setValueV4ui(gl, v) {
		const cache = this.cache;
		if (arraysEqual(cache, v)) return;
		gl.uniform4uiv(this.addr, v);
		copyArray(cache, v);
	} // Single texture (2D / Cube)


	function setValueT1(gl, v, textures) {
		const cache = this.cache;
		const unit = textures.allocateTextureUnit();

		if (cache[0] !== unit) {
			gl.uniform1i(this.addr, unit);
			cache[0] = unit;
		}

		textures.setTexture2D(v || emptyTexture, unit);
	}

	function setValueT3D1(gl, v, textures) {
		const cache = this.cache;
		const unit = textures.allocateTextureUnit();

		if (cache[0] !== unit) {
			gl.uniform1i(this.addr, unit);
			cache[0] = unit;
		}

		textures.setTexture3D(v || empty3dTexture, unit);
	}

	function setValueT6(gl, v, textures) {
		const cache = this.cache;
		const unit = textures.allocateTextureUnit();

		if (cache[0] !== unit) {
			gl.uniform1i(this.addr, unit);
			cache[0] = unit;
		}

		textures.setTextureCube(v || emptyCubeTexture, unit);
	}

	function setValueT2DArray1(gl, v, textures) {
		const cache = this.cache;
		const unit = textures.allocateTextureUnit();

		if (cache[0] !== unit) {
			gl.uniform1i(this.addr, unit);
			cache[0] = unit;
		}

		textures.setTexture2DArray(v || emptyArrayTexture, unit);
	} // Helper to pick the right setter for the singular case


	function getSingularSetter(type) {
		switch (type) {
			case 0x1406:
				return setValueV1f;
			// FLOAT

			case 0x8b50:
				return setValueV2f;
			// _VEC2

			case 0x8b51:
				return setValueV3f;
			// _VEC3

			case 0x8b52:
				return setValueV4f;
			// _VEC4

			case 0x8b5a:
				return setValueM2;
			// _MAT2

			case 0x8b5b:
				return setValueM3;
			// _MAT3

			case 0x8b5c:
				return setValueM4;
			// _MAT4

			case 0x1404:
			case 0x8b56:
				return setValueV1i;
			// INT, BOOL

			case 0x8b53:
			case 0x8b57:
				return setValueV2i;
			// _VEC2

			case 0x8b54:
			case 0x8b58:
				return setValueV3i;
			// _VEC3

			case 0x8b55:
			case 0x8b59:
				return setValueV4i;
			// _VEC4

			case 0x1405:
				return setValueV1ui;
			// UINT

			case 0x8dc6:
				return setValueV2ui;
			// _VEC2

			case 0x8dc7:
				return setValueV3ui;
			// _VEC3

			case 0x8dc8:
				return setValueV4ui;
			// _VEC4

			case 0x8b5e: // SAMPLER_2D

			case 0x8d66: // SAMPLER_EXTERNAL_OES

			case 0x8dca: // INT_SAMPLER_2D

			case 0x8dd2: // UNSIGNED_INT_SAMPLER_2D

			case 0x8b62:
				// SAMPLER_2D_SHADOW
				return setValueT1;

			case 0x8b5f: // SAMPLER_3D

			case 0x8dcb: // INT_SAMPLER_3D

			case 0x8dd3:
				// UNSIGNED_INT_SAMPLER_3D
				return setValueT3D1;

			case 0x8b60: // SAMPLER_CUBE

			case 0x8dcc: // INT_SAMPLER_CUBE

			case 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE

			case 0x8dc5:
				// SAMPLER_CUBE_SHADOW
				return setValueT6;

			case 0x8dc1: // SAMPLER_2D_ARRAY

			case 0x8dcf: // INT_SAMPLER_2D_ARRAY

			case 0x8dd7: // UNSIGNED_INT_SAMPLER_2D_ARRAY

			case 0x8dc4:
				// SAMPLER_2D_ARRAY_SHADOW
				return setValueT2DArray1;
		}
	} // Array of scalars


	function setValueV1fArray(gl, v) {
		gl.uniform1fv(this.addr, v);
	} // Array of vectors (from flat array or array of THREE.VectorN)


	function setValueV2fArray(gl, v) {
		const data = flatten(v, this.size, 2);
		gl.uniform2fv(this.addr, data);
	}

	function setValueV3fArray(gl, v) {
		const data = flatten(v, this.size, 3);
		gl.uniform3fv(this.addr, data);
	}

	function setValueV4fArray(gl, v) {
		const data = flatten(v, this.size, 4);
		gl.uniform4fv(this.addr, data);
	} // Array of matrices (from flat array or array of THREE.MatrixN)


	function setValueM2Array(gl, v) {
		const data = flatten(v, this.size, 4);
		gl.uniformMatrix2fv(this.addr, false, data);
	}

	function setValueM3Array(gl, v) {
		const data = flatten(v, this.size, 9);
		gl.uniformMatrix3fv(this.addr, false, data);
	}

	function setValueM4Array(gl, v) {
		const data = flatten(v, this.size, 16);
		gl.uniformMatrix4fv(this.addr, false, data);
	} // Array of integer / boolean


	function setValueV1iArray(gl, v) {
		gl.uniform1iv(this.addr, v);
	} // Array of integer / boolean vectors (from flat array)


	function setValueV2iArray(gl, v) {
		gl.uniform2iv(this.addr, v);
	}

	function setValueV3iArray(gl, v) {
		gl.uniform3iv(this.addr, v);
	}

	function setValueV4iArray(gl, v) {
		gl.uniform4iv(this.addr, v);
	} // Array of unsigned integer


	function setValueV1uiArray(gl, v) {
		gl.uniform1uiv(this.addr, v);
	} // Array of unsigned integer vectors (from flat array)


	function setValueV2uiArray(gl, v) {
		gl.uniform2uiv(this.addr, v);
	}

	function setValueV3uiArray(gl, v) {
		gl.uniform3uiv(this.addr, v);
	}

	function setValueV4uiArray(gl, v) {
		gl.uniform4uiv(this.addr, v);
	} // Array of textures (2D / 3D / Cube / 2DArray)


	function setValueT1Array(gl, v, textures) {
		const n = v.length;
		const units = allocTexUnits(textures, n);
		gl.uniform1iv(this.addr, units);

		for (let i = 0; i !== n; ++i) {
			textures.setTexture2D(v[i] || emptyTexture, units[i]);
		}
	}

	function setValueT3DArray(gl, v, textures) {
		const n = v.length;
		const units = allocTexUnits(textures, n);
		gl.uniform1iv(this.addr, units);

		for (let i = 0; i !== n; ++i) {
			textures.setTexture3D(v[i] || empty3dTexture, units[i]);
		}
	}

	function setValueT6Array(gl, v, textures) {
		const n = v.length;
		const units = allocTexUnits(textures, n);
		gl.uniform1iv(this.addr, units);

		for (let i = 0; i !== n; ++i) {
			textures.setTextureCube(v[i] || emptyCubeTexture, units[i]);
		}
	}

	function setValueT2DArrayArray(gl, v, textures) {
		const n = v.length;
		const units = allocTexUnits(textures, n);
		gl.uniform1iv(this.addr, units);

		for (let i = 0; i !== n; ++i) {
			textures.setTexture2DArray(v[i] || emptyArrayTexture, units[i]);
		}
	} // Helper to pick the right setter for a pure (bottom-level) array


	function getPureArraySetter(type) {
		switch (type) {
			case 0x1406:
				return setValueV1fArray;
			// FLOAT

			case 0x8b50:
				return setValueV2fArray;
			// _VEC2

			case 0x8b51:
				return setValueV3fArray;
			// _VEC3

			case 0x8b52:
				return setValueV4fArray;
			// _VEC4

			case 0x8b5a:
				return setValueM2Array;
			// _MAT2

			case 0x8b5b:
				return setValueM3Array;
			// _MAT3

			case 0x8b5c:
				return setValueM4Array;
			// _MAT4

			case 0x1404:
			case 0x8b56:
				return setValueV1iArray;
			// INT, BOOL

			case 0x8b53:
			case 0x8b57:
				return setValueV2iArray;
			// _VEC2

			case 0x8b54:
			case 0x8b58:
				return setValueV3iArray;
			// _VEC3

			case 0x8b55:
			case 0x8b59:
				return setValueV4iArray;
			// _VEC4

			case 0x1405:
				return setValueV1uiArray;
			// UINT

			case 0x8dc6:
				return setValueV2uiArray;
			// _VEC2

			case 0x8dc7:
				return setValueV3uiArray;
			// _VEC3

			case 0x8dc8:
				return setValueV4uiArray;
			// _VEC4

			case 0x8b5e: // SAMPLER_2D

			case 0x8d66: // SAMPLER_EXTERNAL_OES

			case 0x8dca: // INT_SAMPLER_2D

			case 0x8dd2: // UNSIGNED_INT_SAMPLER_2D

			case 0x8b62:
				// SAMPLER_2D_SHADOW
				return setValueT1Array;

			case 0x8b5f: // SAMPLER_3D

			case 0x8dcb: // INT_SAMPLER_3D

			case 0x8dd3:
				// UNSIGNED_INT_SAMPLER_3D
				return setValueT3DArray;

			case 0x8b60: // SAMPLER_CUBE

			case 0x8dcc: // INT_SAMPLER_CUBE

			case 0x8dd4: // UNSIGNED_INT_SAMPLER_CUBE

			case 0x8dc5:
				// SAMPLER_CUBE_SHADOW
				return setValueT6Array;

			case 0x8dc1: // SAMPLER_2D_ARRAY

			case 0x8dcf: // INT_SAMPLER_2D_ARRAY

			case 0x8dd7: // UNSIGNED_INT_SAMPLER_2D_ARRAY

			case 0x8dc4:
				// SAMPLER_2D_ARRAY_SHADOW
				return setValueT2DArrayArray;
		}
	} // --- Uniform Classes ---


	class SingleUniform {
		constructor(id, activeInfo, addr) {
			this.id = id;
			this.addr = addr;
			this.cache = [];
			this.setValue = getSingularSetter(activeInfo.type); // this.path = activeInfo.name; // DEBUG
		}

	}

	class PureArrayUniform {
		constructor(id, activeInfo, addr) {
			this.id = id;
			this.addr = addr;
			this.cache = [];
			this.size = activeInfo.size;
			this.setValue = getPureArraySetter(activeInfo.type); // this.path = activeInfo.name; // DEBUG
		}

	}

	class StructuredUniform {
		constructor(id) {
			this.id = id;
			this.seq = [];
			this.map = {};
		}

		setValue(gl, value, textures) {
			const seq = this.seq;

			for (let i = 0, n = seq.length; i !== n; ++i) {
				const u = seq[i];
				u.setValue(gl, value[u.id], textures);
			}
		}

	} // --- Top-level ---
	// Parser - builds up the property tree from the path strings


	const RePathPart = /(\w+)(\])?(\[|\.)?/g; // extracts
	// 	- the identifier (member name or array index)
	//	- followed by an optional right bracket (found when array index)
	//	- followed by an optional left bracket or dot (type of subscript)
	//
	// Note: These portions can be read in a non-overlapping fashion and
	// allow straightforward parsing of the hierarchy that WebGL encodes
	// in the uniform names.

	function addUniform(container, uniformObject) {
		container.seq.push(uniformObject);
		container.map[uniformObject.id] = uniformObject;
	}

	function parseUniform(activeInfo, addr, container) {
		const path = activeInfo.name,
					pathLength = path.length; // reset RegExp object, because of the early exit of a previous run

		RePathPart.lastIndex = 0;

		while (true) {
			const match = RePathPart.exec(path),
						matchEnd = RePathPart.lastIndex;
			let id = match[1];
			const idIsIndex = match[2] === ']',
						subscript = match[3];
			if (idIsIndex) id = id | 0; // convert to integer

			if (subscript === undefined || subscript === '[' && matchEnd + 2 === pathLength) {
				// bare name or "pure" bottom-level array "[0]" suffix
				addUniform(container, subscript === undefined ? new SingleUniform(id, activeInfo, addr) : new PureArrayUniform(id, activeInfo, addr));
				break;
			} else {
				// step into inner node / create it in case it doesn't exist
				const map = container.map;
				let next = map[id];

				if (next === undefined) {
					next = new StructuredUniform(id);
					addUniform(container, next);
				}

				container = next;
			}
		}
	} // Root Container


	class WebGLUniforms {
		constructor(gl, program) {
			this.seq = [];
			this.map = {};
			const n = gl.getProgramParameter(program, gl.ACTIVE_UNIFORMS);

			for (let i = 0; i < n; ++i) {
				const info = gl.getActiveUniform(program, i),
							addr = gl.getUniformLocation(program, info.name);
				parseUniform(info, addr, this);
			}
		}

		setValue(gl, name, value, textures) {
			const u = this.map[name];
			if (u !== undefined) u.setValue(gl, value, textures);
		}

		setOptional(gl, object, name) {
			const v = object[name];
			if (v !== undefined) this.setValue(gl, name, v);
		}

		static upload(gl, seq, values, textures) {
			for (let i = 0, n = seq.length; i !== n; ++i) {
				const u = seq[i],
							v = values[u.id];

				if (v.needsUpdate !== false) {
					// note: always updating when .needsUpdate is undefined
					u.setValue(gl, v.value, textures);
				}
			}
		}

		static seqWithValue(seq, values) {
			const r = [];

			for (let i = 0, n = seq.length; i !== n; ++i) {
				const u = seq[i];
				if (u.id in values) r.push(u);
			}

			return r;
		}

	}

	function WebGLShader(gl, type, string) {
		const shader = gl.createShader(type);
		gl.shaderSource(shader, string);
		gl.compileShader(shader);
		return shader;
	}

	let programIdCount = 0;

	function handleSource(string, errorLine) {
		const lines = string.split('\n');
		const lines2 = [];
		const from = Math.max(errorLine - 6, 0);
		const to = Math.min(errorLine + 6, lines.length);

		for (let i = from; i < to; i++) {
			const line = i + 1;
			lines2.push(`${line === errorLine ? '>' : ' '} ${line}: ${lines[i]}`);
		}

		return lines2.join('\n');
	}

	function getEncodingComponents(encoding) {
		switch (encoding) {
			case LinearEncoding:
				return ['Linear', '( value )'];

			case sRGBEncoding:
				return ['sRGB', '( value )'];

			default:
				console.warn('THREE.WebGLProgram: Unsupported encoding:', encoding);
				return ['Linear', '( value )'];
		}
	}

	function getShaderErrors(gl, shader, type) {
		const status = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
		const errors = gl.getShaderInfoLog(shader).trim();
		if (status && errors === '') return '';
		const errorMatches = /ERROR: 0:(\d+)/.exec(errors);

		if (errorMatches) {
			// --enable-privileged-webgl-extension
			// console.log( '**' + type + '**', gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( shader ) );
			const errorLine = parseInt(errorMatches[1]);
			return type.toUpperCase() + '\n\n' + errors + '\n\n' + handleSource(gl.getShaderSource(shader), errorLine);
		} else {
			return errors;
		}
	}

	function getTexelEncodingFunction(functionName, encoding) {
		const components = getEncodingComponents(encoding);
		return 'vec4 ' + functionName + '( vec4 value ) { return LinearTo' + components[0] + components[1] + '; }';
	}

	function getToneMappingFunction(functionName, toneMapping) {
		let toneMappingName;

		switch (toneMapping) {
			case LinearToneMapping:
				toneMappingName = 'Linear';
				break;

			case ReinhardToneMapping:
				toneMappingName = 'Reinhard';
				break;

			case CineonToneMapping:
				toneMappingName = 'OptimizedCineon';
				break;

			case ACESFilmicToneMapping:
				toneMappingName = 'ACESFilmic';
				break;

			case CustomToneMapping:
				toneMappingName = 'Custom';
				break;

			default:
				console.warn('THREE.WebGLProgram: Unsupported toneMapping:', toneMapping);
				toneMappingName = 'Linear';
		}

		return 'vec3 ' + functionName + '( vec3 color ) { return ' + toneMappingName + 'ToneMapping( color ); }';
	}

	function generateExtensions(parameters) {
		const chunks = [parameters.extensionDerivatives || !!parameters.envMapCubeUVHeight || parameters.bumpMap || parameters.tangentSpaceNormalMap || parameters.clearcoatNormalMap || parameters.flatShading || parameters.shaderID === 'physical' ? '#extension GL_OES_standard_derivatives : enable' : '', (parameters.extensionFragDepth || parameters.logarithmicDepthBuffer) && parameters.rendererExtensionFragDepth ? '#extension GL_EXT_frag_depth : enable' : '', parameters.extensionDrawBuffers && parameters.rendererExtensionDrawBuffers ? '#extension GL_EXT_draw_buffers : require' : '', (parameters.extensionShaderTextureLOD || parameters.envMap || parameters.transmission) && parameters.rendererExtensionShaderTextureLod ? '#extension GL_EXT_shader_texture_lod : enable' : ''];
		return chunks.filter(filterEmptyLine).join('\n');
	}

	function generateDefines(defines) {
		const chunks = [];

		for (const name in defines) {
			const value = defines[name];
			if (value === false) continue;
			chunks.push('#define ' + name + ' ' + value);
		}

		return chunks.join('\n');
	}

	function fetchAttributeLocations(gl, program) {
		const attributes = {};
		const n = gl.getProgramParameter(program, gl.ACTIVE_ATTRIBUTES);

		for (let i = 0; i < n; i++) {
			const info = gl.getActiveAttrib(program, i);
			const name = info.name;
			let locationSize = 1;
			if (info.type === gl.FLOAT_MAT2) locationSize = 2;
			if (info.type === gl.FLOAT_MAT3) locationSize = 3;
			if (info.type === gl.FLOAT_MAT4) locationSize = 4; // console.log( 'THREE.WebGLProgram: ACTIVE VERTEX ATTRIBUTE:', name, i );

			attributes[name] = {
				type: info.type,
				location: gl.getAttribLocation(program, name),
				locationSize: locationSize
			};
		}

		return attributes;
	}

	function filterEmptyLine(string) {
		return string !== '';
	}

	function replaceLightNums(string, parameters) {
		return string.replace(/NUM_DIR_LIGHTS/g, parameters.numDirLights).replace(/NUM_SPOT_LIGHTS/g, parameters.numSpotLights).replace(/NUM_RECT_AREA_LIGHTS/g, parameters.numRectAreaLights).replace(/NUM_POINT_LIGHTS/g, parameters.numPointLights).replace(/NUM_HEMI_LIGHTS/g, parameters.numHemiLights).replace(/NUM_DIR_LIGHT_SHADOWS/g, parameters.numDirLightShadows).replace(/NUM_SPOT_LIGHT_SHADOWS/g, parameters.numSpotLightShadows).replace(/NUM_POINT_LIGHT_SHADOWS/g, parameters.numPointLightShadows);
	}

	function replaceClippingPlaneNums(string, parameters) {
		return string.replace(/NUM_CLIPPING_PLANES/g, parameters.numClippingPlanes).replace(/UNION_CLIPPING_PLANES/g, parameters.numClippingPlanes - parameters.numClipIntersection);
	} // Resolve Includes


	const includePattern = /^[ \t]*#include +<([\w\d./]+)>/gm;

	function resolveIncludes(string) {
		return string.replace(includePattern, includeReplacer);
	}

	function includeReplacer(match, include) {
		const string = ShaderChunk[include];

		if (string === undefined) {
			throw new Error('Can not resolve #include <' + include + '>');
		}

		return resolveIncludes(string);
	} // Unroll Loops


	const deprecatedUnrollLoopPattern = /#pragma unroll_loop[\s]+?for \( int i \= (\d+)\; i < (\d+)\; i \+\+ \) \{([\s\S]+?)(?=\})\}/g;
	const unrollLoopPattern = /#pragma unroll_loop_start\s+for\s*\(\s*int\s+i\s*=\s*(\d+)\s*;\s*i\s*<\s*(\d+)\s*;\s*i\s*\+\+\s*\)\s*{([\s\S]+?)}\s+#pragma unroll_loop_end/g;

	function unrollLoops(string) {
		return string.replace(unrollLoopPattern, loopReplacer).replace(deprecatedUnrollLoopPattern, deprecatedLoopReplacer);
	}

	function deprecatedLoopReplacer(match, start, end, snippet) {
		console.warn('WebGLProgram: #pragma unroll_loop shader syntax is deprecated. Please use #pragma unroll_loop_start syntax instead.');
		return loopReplacer(match, start, end, snippet);
	}

	function loopReplacer(match, start, end, snippet) {
		let string = '';

		for (let i = parseInt(start); i < parseInt(end); i++) {
			string += snippet.replace(/\[\s*i\s*\]/g, '[ ' + i + ' ]').replace(/UNROLLED_LOOP_INDEX/g, i);
		}

		return string;
	} //


	function generatePrecision(parameters) {
		let precisionstring = 'precision ' + parameters.precision + ' float;\nprecision ' + parameters.precision + ' int;';

		if (parameters.precision === 'highp') {
			precisionstring += '\n#define HIGH_PRECISION';
		} else if (parameters.precision === 'mediump') {
			precisionstring += '\n#define MEDIUM_PRECISION';
		} else if (parameters.precision === 'lowp') {
			precisionstring += '\n#define LOW_PRECISION';
		}

		return precisionstring;
	}

	function generateShadowMapTypeDefine(parameters) {
		let shadowMapTypeDefine = 'SHADOWMAP_TYPE_BASIC';

		if (parameters.shadowMapType === PCFShadowMap) {
			shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF';
		} else if (parameters.shadowMapType === PCFSoftShadowMap) {
			shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF_SOFT';
		} else if (parameters.shadowMapType === VSMShadowMap) {
			shadowMapTypeDefine = 'SHADOWMAP_TYPE_VSM';
		}

		return shadowMapTypeDefine;
	}

	function generateEnvMapTypeDefine(parameters) {
		let envMapTypeDefine = 'ENVMAP_TYPE_CUBE';

		if (parameters.envMap) {
			switch (parameters.envMapMode) {
				case CubeReflectionMapping:
				case CubeRefractionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_CUBE';
					break;

				case CubeUVReflectionMapping:
					envMapTypeDefine = 'ENVMAP_TYPE_CUBE_UV';
					break;
			}
		}

		return envMapTypeDefine;
	}

	function generateEnvMapModeDefine(parameters) {
		let envMapModeDefine = 'ENVMAP_MODE_REFLECTION';

		if (parameters.envMap) {
			switch (parameters.envMapMode) {
				case CubeRefractionMapping:
					envMapModeDefine = 'ENVMAP_MODE_REFRACTION';
					break;
			}
		}

		return envMapModeDefine;
	}

	function generateEnvMapBlendingDefine(parameters) {
		let envMapBlendingDefine = 'ENVMAP_BLENDING_NONE';

		if (parameters.envMap) {
			switch (parameters.combine) {
				case MultiplyOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';
					break;

				case MixOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_MIX';
					break;

				case AddOperation:
					envMapBlendingDefine = 'ENVMAP_BLENDING_ADD';
					break;
			}
		}

		return envMapBlendingDefine;
	}

	function generateCubeUVSize(parameters) {
		const imageHeight = parameters.envMapCubeUVHeight;
		if (imageHeight === null) return null;
		const maxMip = Math.log2(imageHeight) - 2;
		const texelHeight = 1.0 / imageHeight;
		const texelWidth = 1.0 / (3 * Math.max(Math.pow(2, maxMip), 7 * 16));
		return {
			texelWidth,
			texelHeight,
			maxMip
		};
	}

	function WebGLProgram(renderer, cacheKey, parameters, bindingStates) {
		// TODO Send this event to Three.js DevTools
		// console.log( 'WebGLProgram', cacheKey );
		const gl = renderer.getContext();
		const defines = parameters.defines;
		let vertexShader = parameters.vertexShader;
		let fragmentShader = parameters.fragmentShader;
		const shadowMapTypeDefine = generateShadowMapTypeDefine(parameters);
		const envMapTypeDefine = generateEnvMapTypeDefine(parameters);
		const envMapModeDefine = generateEnvMapModeDefine(parameters);
		const envMapBlendingDefine = generateEnvMapBlendingDefine(parameters);
		const envMapCubeUVSize = generateCubeUVSize(parameters);
		const customExtensions = parameters.isWebGL2 ? '' : generateExtensions(parameters);
		const customDefines = generateDefines(defines);
		const program = gl.createProgram();
		let prefixVertex, prefixFragment;
		let versionString = parameters.glslVersion ? '#version ' + parameters.glslVersion + '\n' : '';

		if (parameters.isRawShaderMaterial) {
			prefixVertex = [customDefines].filter(filterEmptyLine).join('\n');

			if (prefixVertex.length > 0) {
				prefixVertex += '\n';
			}

			prefixFragment = [customExtensions, customDefines].filter(filterEmptyLine).join('\n');

			if (prefixFragment.length > 0) {
				prefixFragment += '\n';
			}
		} else {
			prefixVertex = [generatePrecision(parameters), '#define SHADER_NAME ' + parameters.shaderName, customDefines, parameters.instancing ? '#define USE_INSTANCING' : '', parameters.instancingColor ? '#define USE_INSTANCING_COLOR' : '', parameters.supportsVertexTextures ? '#define VERTEX_TEXTURES' : '', parameters.useFog && parameters.fog ? '#define USE_FOG' : '', parameters.useFog && parameters.fogExp2 ? '#define FOG_EXP2' : '', parameters.map ? '#define USE_MAP' : '', parameters.envMap ? '#define USE_ENVMAP' : '', parameters.envMap ? '#define ' + envMapModeDefine : '', parameters.lightMap ? '#define USE_LIGHTMAP' : '', parameters.aoMap ? '#define USE_AOMAP' : '', parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '', parameters.bumpMap ? '#define USE_BUMPMAP' : '', parameters.normalMap ? '#define USE_NORMALMAP' : '', parameters.normalMap && parameters.objectSpaceNormalMap ? '#define OBJECTSPACE_NORMALMAP' : '', parameters.normalMap && parameters.tangentSpaceNormalMap ? '#define TANGENTSPACE_NORMALMAP' : '', parameters.clearcoatMap ? '#define USE_CLEARCOATMAP' : '', parameters.clearcoatRoughnessMap ? '#define USE_CLEARCOAT_ROUGHNESSMAP' : '', parameters.clearcoatNormalMap ? '#define USE_CLEARCOAT_NORMALMAP' : '', parameters.iridescenceMap ? '#define USE_IRIDESCENCEMAP' : '', parameters.iridescenceThicknessMap ? '#define USE_IRIDESCENCE_THICKNESSMAP' : '', parameters.displacementMap && parameters.supportsVertexTextures ? '#define USE_DISPLACEMENTMAP' : '', parameters.specularMap ? '#define USE_SPECULARMAP' : '', parameters.specularIntensityMap ? '#define USE_SPECULARINTENSITYMAP' : '', parameters.specularColorMap ? '#define USE_SPECULARCOLORMAP' : '', parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '', parameters.metalnessMap ? '#define USE_METALNESSMAP' : '', parameters.alphaMap ? '#define USE_ALPHAMAP' : '', parameters.transmission ? '#define USE_TRANSMISSION' : '', parameters.transmissionMap ? '#define USE_TRANSMISSIONMAP' : '', parameters.thicknessMap ? '#define USE_THICKNESSMAP' : '', parameters.sheenColorMap ? '#define USE_SHEENCOLORMAP' : '', parameters.sheenRoughnessMap ? '#define USE_SHEENROUGHNESSMAP' : '', parameters.vertexTangents ? '#define USE_TANGENT' : '', parameters.vertexColors ? '#define USE_COLOR' : '', parameters.vertexAlphas ? '#define USE_COLOR_ALPHA' : '', parameters.vertexUvs ? '#define USE_UV' : '', parameters.uvsVertexOnly ? '#define UVS_VERTEX_ONLY' : '', parameters.flatShading ? '#define FLAT_SHADED' : '', parameters.skinning ? '#define USE_SKINNING' : '', parameters.morphTargets ? '#define USE_MORPHTARGETS' : '', parameters.morphNormals && parameters.flatShading === false ? '#define USE_MORPHNORMALS' : '', parameters.morphColors && parameters.isWebGL2 ? '#define USE_MORPHCOLORS' : '', parameters.morphTargetsCount > 0 && parameters.isWebGL2 ? '#define MORPHTARGETS_TEXTURE' : '', parameters.morphTargetsCount > 0 && parameters.isWebGL2 ? '#define MORPHTARGETS_TEXTURE_STRIDE ' + parameters.morphTextureStride : '', parameters.morphTargetsCount > 0 && parameters.isWebGL2 ? '#define MORPHTARGETS_COUNT ' + parameters.morphTargetsCount : '', parameters.doubleSided ? '#define DOUBLE_SIDED' : '', parameters.flipSided ? '#define FLIP_SIDED' : '', parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '', parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '', parameters.sizeAttenuation ? '#define USE_SIZEATTENUATION' : '', parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '', parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ? '#define USE_LOGDEPTHBUF_EXT' : '', 'uniform mat4 modelMatrix;', 'uniform mat4 modelViewMatrix;', 'uniform mat4 projectionMatrix;', 'uniform mat4 viewMatrix;', 'uniform mat3 normalMatrix;', 'uniform vec3 cameraPosition;', 'uniform bool isOrthographic;', '#ifdef USE_INSTANCING', '	attribute mat4 instanceMatrix;', '#endif', '#ifdef USE_INSTANCING_COLOR', '	attribute vec3 instanceColor;', '#endif', 'attribute vec3 position;', 'attribute vec3 normal;', 'attribute vec2 uv;', '#ifdef USE_TANGENT', '	attribute vec4 tangent;', '#endif', '#if defined( USE_COLOR_ALPHA )', '	attribute vec4 color;', '#elif defined( USE_COLOR )', '	attribute vec3 color;', '#endif', '#if ( defined( USE_MORPHTARGETS ) && ! defined( MORPHTARGETS_TEXTURE ) )', '	attribute vec3 morphTarget0;', '	attribute vec3 morphTarget1;', '	attribute vec3 morphTarget2;', '	attribute vec3 morphTarget3;', '	#ifdef USE_MORPHNORMALS', '		attribute vec3 morphNormal0;', '		attribute vec3 morphNormal1;', '		attribute vec3 morphNormal2;', '		attribute vec3 morphNormal3;', '	#else', '		attribute vec3 morphTarget4;', '		attribute vec3 morphTarget5;', '		attribute vec3 morphTarget6;', '		attribute vec3 morphTarget7;', '	#endif', '#endif', '#ifdef USE_SKINNING', '	attribute vec4 skinIndex;', '	attribute vec4 skinWeight;', '#endif', '\n'].filter(filterEmptyLine).join('\n');
			prefixFragment = [customExtensions, generatePrecision(parameters), '#define SHADER_NAME ' + parameters.shaderName, customDefines, parameters.useFog && parameters.fog ? '#define USE_FOG' : '', parameters.useFog && parameters.fogExp2 ? '#define FOG_EXP2' : '', parameters.map ? '#define USE_MAP' : '', parameters.matcap ? '#define USE_MATCAP' : '', parameters.envMap ? '#define USE_ENVMAP' : '', parameters.envMap ? '#define ' + envMapTypeDefine : '', parameters.envMap ? '#define ' + envMapModeDefine : '', parameters.envMap ? '#define ' + envMapBlendingDefine : '', envMapCubeUVSize ? '#define CUBEUV_TEXEL_WIDTH ' + envMapCubeUVSize.texelWidth : '', envMapCubeUVSize ? '#define CUBEUV_TEXEL_HEIGHT ' + envMapCubeUVSize.texelHeight : '', envMapCubeUVSize ? '#define CUBEUV_MAX_MIP ' + envMapCubeUVSize.maxMip + '.0' : '', parameters.lightMap ? '#define USE_LIGHTMAP' : '', parameters.aoMap ? '#define USE_AOMAP' : '', parameters.emissiveMap ? '#define USE_EMISSIVEMAP' : '', parameters.bumpMap ? '#define USE_BUMPMAP' : '', parameters.normalMap ? '#define USE_NORMALMAP' : '', parameters.normalMap && parameters.objectSpaceNormalMap ? '#define OBJECTSPACE_NORMALMAP' : '', parameters.normalMap && parameters.tangentSpaceNormalMap ? '#define TANGENTSPACE_NORMALMAP' : '', parameters.clearcoat ? '#define USE_CLEARCOAT' : '', parameters.clearcoatMap ? '#define USE_CLEARCOATMAP' : '', parameters.clearcoatRoughnessMap ? '#define USE_CLEARCOAT_ROUGHNESSMAP' : '', parameters.clearcoatNormalMap ? '#define USE_CLEARCOAT_NORMALMAP' : '', parameters.iridescence ? '#define USE_IRIDESCENCE' : '', parameters.iridescenceMap ? '#define USE_IRIDESCENCEMAP' : '', parameters.iridescenceThicknessMap ? '#define USE_IRIDESCENCE_THICKNESSMAP' : '', parameters.specularMap ? '#define USE_SPECULARMAP' : '', parameters.specularIntensityMap ? '#define USE_SPECULARINTENSITYMAP' : '', parameters.specularColorMap ? '#define USE_SPECULARCOLORMAP' : '', parameters.roughnessMap ? '#define USE_ROUGHNESSMAP' : '', parameters.metalnessMap ? '#define USE_METALNESSMAP' : '', parameters.alphaMap ? '#define USE_ALPHAMAP' : '', parameters.alphaTest ? '#define USE_ALPHATEST' : '', parameters.sheen ? '#define USE_SHEEN' : '', parameters.sheenColorMap ? '#define USE_SHEENCOLORMAP' : '', parameters.sheenRoughnessMap ? '#define USE_SHEENROUGHNESSMAP' : '', parameters.transmission ? '#define USE_TRANSMISSION' : '', parameters.transmissionMap ? '#define USE_TRANSMISSIONMAP' : '', parameters.thicknessMap ? '#define USE_THICKNESSMAP' : '', parameters.decodeVideoTexture ? '#define DECODE_VIDEO_TEXTURE' : '', parameters.vertexTangents ? '#define USE_TANGENT' : '', parameters.vertexColors || parameters.instancingColor ? '#define USE_COLOR' : '', parameters.vertexAlphas ? '#define USE_COLOR_ALPHA' : '', parameters.vertexUvs ? '#define USE_UV' : '', parameters.uvsVertexOnly ? '#define UVS_VERTEX_ONLY' : '', parameters.gradientMap ? '#define USE_GRADIENTMAP' : '', parameters.flatShading ? '#define FLAT_SHADED' : '', parameters.doubleSided ? '#define DOUBLE_SIDED' : '', parameters.flipSided ? '#define FLIP_SIDED' : '', parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '', parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '', parameters.premultipliedAlpha ? '#define PREMULTIPLIED_ALPHA' : '', parameters.physicallyCorrectLights ? '#define PHYSICALLY_CORRECT_LIGHTS' : '', parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '', parameters.logarithmicDepthBuffer && parameters.rendererExtensionFragDepth ? '#define USE_LOGDEPTHBUF_EXT' : '', 'uniform mat4 viewMatrix;', 'uniform vec3 cameraPosition;', 'uniform bool isOrthographic;', parameters.toneMapping !== NoToneMapping ? '#define TONE_MAPPING' : '', parameters.toneMapping !== NoToneMapping ? ShaderChunk['tonemapping_pars_fragment'] : '', // this code is required here because it is used by the toneMapping() function defined below
			parameters.toneMapping !== NoToneMapping ? getToneMappingFunction('toneMapping', parameters.toneMapping) : '', parameters.dithering ? '#define DITHERING' : '', parameters.opaque ? '#define OPAQUE' : '', ShaderChunk['encodings_pars_fragment'], // this code is required here because it is used by the various encoding/decoding function defined below
			getTexelEncodingFunction('linearToOutputTexel', parameters.outputEncoding), parameters.useDepthPacking ? '#define DEPTH_PACKING ' + parameters.depthPacking : '', '\n'].filter(filterEmptyLine).join('\n');
		}

		vertexShader = resolveIncludes(vertexShader);
		vertexShader = replaceLightNums(vertexShader, parameters);
		vertexShader = replaceClippingPlaneNums(vertexShader, parameters);
		fragmentShader = resolveIncludes(fragmentShader);
		fragmentShader = replaceLightNums(fragmentShader, parameters);
		fragmentShader = replaceClippingPlaneNums(fragmentShader, parameters);
		vertexShader = unrollLoops(vertexShader);
		fragmentShader = unrollLoops(fragmentShader);

		if (parameters.isWebGL2 && parameters.isRawShaderMaterial !== true) {
			// GLSL 3.0 conversion for built-in materials and ShaderMaterial
			versionString = '#version 300 es\n';
			prefixVertex = ['precision mediump sampler2DArray;', '#define attribute in', '#define varying out', '#define texture2D texture'].join('\n') + '\n' + prefixVertex;
			prefixFragment = ['#define varying in', parameters.glslVersion === GLSL3 ? '' : 'layout(location = 0) out highp vec4 pc_fragColor;', parameters.glslVersion === GLSL3 ? '' : '#define gl_FragColor pc_fragColor', '#define gl_FragDepthEXT gl_FragDepth', '#define texture2D texture', '#define textureCube texture', '#define texture2DProj textureProj', '#define texture2DLodEXT textureLod', '#define texture2DProjLodEXT textureProjLod', '#define textureCubeLodEXT textureLod', '#define texture2DGradEXT textureGrad', '#define texture2DProjGradEXT textureProjGrad', '#define textureCubeGradEXT textureGrad'].join('\n') + '\n' + prefixFragment;
		}

		const vertexGlsl = versionString + prefixVertex + vertexShader;
		const fragmentGlsl = versionString + prefixFragment + fragmentShader; // console.log( '*VERTEX*', vertexGlsl );
		// console.log( '*FRAGMENT*', fragmentGlsl );

		const glVertexShader = WebGLShader(gl, gl.VERTEX_SHADER, vertexGlsl);
		const glFragmentShader = WebGLShader(gl, gl.FRAGMENT_SHADER, fragmentGlsl);
		gl.attachShader(program, glVertexShader);
		gl.attachShader(program, glFragmentShader); // Force a particular attribute to index 0.

		if (parameters.index0AttributeName !== undefined) {
			gl.bindAttribLocation(program, 0, parameters.index0AttributeName);
		} else if (parameters.morphTargets === true) {
			// programs with morphTargets displace position out of attribute 0
			gl.bindAttribLocation(program, 0, 'position');
		}

		gl.linkProgram(program); // check for link errors

		if (renderer.debug.checkShaderErrors) {
			const programLog = gl.getProgramInfoLog(program).trim();
			const vertexLog = gl.getShaderInfoLog(glVertexShader).trim();
			const fragmentLog = gl.getShaderInfoLog(glFragmentShader).trim();
			let runnable = true;
			let haveDiagnostics = true;

			if (gl.getProgramParameter(program, gl.LINK_STATUS) === false) {
				runnable = false;
				const vertexErrors = getShaderErrors(gl, glVertexShader, 'vertex');
				const fragmentErrors = getShaderErrors(gl, glFragmentShader, 'fragment');
                 
				console.error('THREE.WebGLProgram: Shader Error ' + gl.getError() + ' - ' + 'VALIDATE_STATUS ' + gl.getProgramParameter(program, gl.VALIDATE_STATUS) + '\n\n' + 'Program Info Log: ' + programLog , '\nvertexErrors: ' + vertexErrors , '\n fragmentErrors: ' + fragmentErrors);
                console.error('错误的shader的fragmentShader（log for mobile）',  fragmentShader.slice(0,500))//xzw add for mobile
            } else if (programLog !== '') {
				console.warn('THREE.WebGLProgram: Program Info Log:', programLog);
			} else if (vertexLog === '' || fragmentLog === '') {
				haveDiagnostics = false;
			}

			if (haveDiagnostics) {
				this.diagnostics = {
					runnable: runnable,
					programLog: programLog,
					vertexShader: {
						log: vertexLog,
						prefix: prefixVertex
					},
					fragmentShader: {
						log: fragmentLog,
						prefix: prefixFragment
					}
				};
			}
		} // Clean up
		// Crashes in iOS9 and iOS10. #18402
		// gl.detachShader( program, glVertexShader );
		// gl.detachShader( program, glFragmentShader );


		gl.deleteShader(glVertexShader);
		gl.deleteShader(glFragmentShader); // set up caching for uniform locations

		let cachedUniforms;

		this.getUniforms = function () {
			if (cachedUniforms === undefined) {
				cachedUniforms = new WebGLUniforms(gl, program);
			}

			return cachedUniforms;
		}; // set up caching for attribute locations


		let cachedAttributes;

		this.getAttributes = function () {
			if (cachedAttributes === undefined) {
				cachedAttributes = fetchAttributeLocations(gl, program);
			}

			return cachedAttributes;
		}; // free resource


		this.destroy = function () {
			bindingStates.releaseStatesOfProgram(this);
			gl.deleteProgram(program);
			this.program = undefined;
		}; //


		this.name = parameters.shaderName;
		this.id = programIdCount++;
		this.cacheKey = cacheKey;
		this.usedTimes = 1;
		this.program = program;
		this.vertexShader = glVertexShader;
		this.fragmentShader = glFragmentShader;
		return this;
	}

	let _id = 0;

	class WebGLShaderCache {
		constructor() {
			this.shaderCache = new Map();
			this.materialCache = new Map();
		}

		update(material) {
			const vertexShader = material.vertexShader;
			const fragmentShader = material.fragmentShader;

			const vertexShaderStage = this._getShaderStage(vertexShader);

			const fragmentShaderStage = this._getShaderStage(fragmentShader);

			const materialShaders = this._getShaderCacheForMaterial(material);

			if (materialShaders.has(vertexShaderStage) === false) {
				materialShaders.add(vertexShaderStage);
				vertexShaderStage.usedTimes++;
			}

			if (materialShaders.has(fragmentShaderStage) === false) {
				materialShaders.add(fragmentShaderStage);
				fragmentShaderStage.usedTimes++;
			}

			return this;
		}

		remove(material) {
			const materialShaders = this.materialCache.get(material);

			for (const shaderStage of materialShaders) {
				shaderStage.usedTimes--;
				if (shaderStage.usedTimes === 0) this.shaderCache.delete(shaderStage.code);
			}

			this.materialCache.delete(material);
			return this;
		}

		getVertexShaderID(material) {
			return this._getShaderStage(material.vertexShader).id;
		}

		getFragmentShaderID(material) {
			return this._getShaderStage(material.fragmentShader).id;
		}

		dispose() {
			this.shaderCache.clear();
			this.materialCache.clear();
		}

		_getShaderCacheForMaterial(material) {
			const cache = this.materialCache;

			if (cache.has(material) === false) {
				cache.set(material, new Set());
			}

			return cache.get(material);
		}

		_getShaderStage(code) {
			const cache = this.shaderCache;

			if (cache.has(code) === false) {
				const stage = new WebGLShaderStage(code);
				cache.set(code, stage);
			}

			return cache.get(code);
		}

	}

	class WebGLShaderStage {
		constructor(code) {
			this.id = _id++;
			this.code = code;
			this.usedTimes = 0;
		}

	}

	function WebGLPrograms(renderer, cubemaps, cubeuvmaps, extensions, capabilities, bindingStates, clipping) {
		const _programLayers = new Layers();

		const _customShaders = new WebGLShaderCache();

		const programs = [];
		const isWebGL2 = capabilities.isWebGL2;
		const logarithmicDepthBuffer = capabilities.logarithmicDepthBuffer;
		const vertexTextures = capabilities.vertexTextures;
		let precision = capabilities.precision;
		const shaderIDs = {
			MeshDepthMaterial: 'depth',
			MeshDistanceMaterial: 'distanceRGBA',
			MeshNormalMaterial: 'normal',
			MeshBasicMaterial: 'basic',
			MeshLambertMaterial: 'lambert',
			MeshPhongMaterial: 'phong',
			MeshToonMaterial: 'toon',
			MeshStandardMaterial: 'physical',
			MeshPhysicalMaterial: 'physical',
			MeshMatcapMaterial: 'matcap',
			LineBasicMaterial: 'basic',
			LineDashedMaterial: 'dashed',
			PointsMaterial: 'points',
			ShadowMaterial: 'shadow',
			SpriteMaterial: 'sprite'
		};

		function getParameters(material, lights, shadows, scene, object) {
			const fog = scene.fog;
			const geometry = object.geometry;
			const environment = material.isMeshStandardMaterial ? scene.environment : null;
			const envMap = (material.isMeshStandardMaterial ? cubeuvmaps : cubemaps).get(material.envMap || environment);
			const envMapCubeUVHeight = !!envMap && envMap.mapping === CubeUVReflectionMapping ? envMap.image.height : null;
			const shaderID = shaderIDs[material.type]; // heuristics to create shader parameters according to lights in the scene
			// (not to blow over maxLights budget)

			if (material.precision !== null) {
				precision = capabilities.getMaxPrecision(material.precision);

				if (precision !== material.precision) {
					console.warn('THREE.WebGLProgram.getParameters:', material.precision, 'not supported, using', precision, 'instead.');
				}
			} //


			const morphAttribute = geometry.morphAttributes.position || geometry.morphAttributes.normal || geometry.morphAttributes.color;
			const morphTargetsCount = morphAttribute !== undefined ? morphAttribute.length : 0;
			let morphTextureStride = 0;
			if (geometry.morphAttributes.position !== undefined) morphTextureStride = 1;
			if (geometry.morphAttributes.normal !== undefined) morphTextureStride = 2;
			if (geometry.morphAttributes.color !== undefined) morphTextureStride = 3; //

			let vertexShader, fragmentShader;
			let customVertexShaderID, customFragmentShaderID;

			if (shaderID) {
				const shader = ShaderLib[shaderID];
				vertexShader = shader.vertexShader;
				fragmentShader = shader.fragmentShader;
			} else {
				vertexShader = material.vertexShader;
				fragmentShader = material.fragmentShader;

				_customShaders.update(material);

				customVertexShaderID = _customShaders.getVertexShaderID(material);
				customFragmentShaderID = _customShaders.getFragmentShaderID(material);
			}

			const currentRenderTarget = renderer.getRenderTarget();
			const useAlphaTest = material.alphaTest > 0;
			const useClearcoat = material.clearcoat > 0;
			const useIridescence = material.iridescence > 0;
			const parameters = {
				isWebGL2: isWebGL2,
				shaderID: shaderID,
				shaderName: material.type,
				vertexShader: vertexShader,
				fragmentShader: fragmentShader,
				defines: material.defines,
				customVertexShaderID: customVertexShaderID,
				customFragmentShaderID: customFragmentShaderID,
				isRawShaderMaterial: material.isRawShaderMaterial === true,
				glslVersion: material.glslVersion,
				precision: precision,
				instancing: object.isInstancedMesh === true,
				instancingColor: object.isInstancedMesh === true && object.instanceColor !== null,
				supportsVertexTextures: vertexTextures,
				outputEncoding: currentRenderTarget === null ? renderer.outputEncoding : currentRenderTarget.isXRRenderTarget === true ? currentRenderTarget.texture.encoding : LinearEncoding,
				map: !!material.map,
				matcap: !!material.matcap,
				envMap: !!envMap,
				envMapMode: envMap && envMap.mapping,
				envMapCubeUVHeight: envMapCubeUVHeight,
				lightMap: !!material.lightMap,
				aoMap: !!material.aoMap,
				emissiveMap: !!material.emissiveMap,
				bumpMap: !!material.bumpMap,
				normalMap: !!material.normalMap,
				objectSpaceNormalMap: material.normalMapType === ObjectSpaceNormalMap,
				tangentSpaceNormalMap: material.normalMapType === TangentSpaceNormalMap,
				decodeVideoTexture: !!material.map && material.map.isVideoTexture === true && material.map.encoding === sRGBEncoding,
				clearcoat: useClearcoat,
				clearcoatMap: useClearcoat && !!material.clearcoatMap,
				clearcoatRoughnessMap: useClearcoat && !!material.clearcoatRoughnessMap,
				clearcoatNormalMap: useClearcoat && !!material.clearcoatNormalMap,
				iridescence: useIridescence,
				iridescenceMap: useIridescence && !!material.iridescenceMap,
				iridescenceThicknessMap: useIridescence && !!material.iridescenceThicknessMap,
				displacementMap: !!material.displacementMap,
				roughnessMap: !!material.roughnessMap,
				metalnessMap: !!material.metalnessMap,
				specularMap: !!material.specularMap,
				specularIntensityMap: !!material.specularIntensityMap,
				specularColorMap: !!material.specularColorMap,
				opaque: material.transparent === false && material.blending === NormalBlending,
				alphaMap: !!material.alphaMap,
				alphaTest: useAlphaTest,
				gradientMap: !!material.gradientMap,
				sheen: material.sheen > 0,
				sheenColorMap: !!material.sheenColorMap,
				sheenRoughnessMap: !!material.sheenRoughnessMap,
				transmission: material.transmission > 0,
				transmissionMap: !!material.transmissionMap,
				thicknessMap: !!material.thicknessMap,
				combine: material.combine,
				vertexTangents: !!material.normalMap && !!geometry.attributes.tangent,
				vertexColors: material.vertexColors,
				vertexAlphas: material.vertexColors === true && !!geometry.attributes.color && geometry.attributes.color.itemSize === 4,
				vertexUvs: !!material.map || !!material.bumpMap || !!material.normalMap || !!material.specularMap || !!material.alphaMap || !!material.emissiveMap || !!material.roughnessMap || !!material.metalnessMap || !!material.clearcoatMap || !!material.clearcoatRoughnessMap || !!material.clearcoatNormalMap || !!material.iridescenceMap || !!material.iridescenceThicknessMap || !!material.displacementMap || !!material.transmissionMap || !!material.thicknessMap || !!material.specularIntensityMap || !!material.specularColorMap || !!material.sheenColorMap || !!material.sheenRoughnessMap,
				uvsVertexOnly: !(!!material.map || !!material.bumpMap || !!material.normalMap || !!material.specularMap || !!material.alphaMap || !!material.emissiveMap || !!material.roughnessMap || !!material.metalnessMap || !!material.clearcoatNormalMap || !!material.iridescenceMap || !!material.iridescenceThicknessMap || material.transmission > 0 || !!material.transmissionMap || !!material.thicknessMap || !!material.specularIntensityMap || !!material.specularColorMap || material.sheen > 0 || !!material.sheenColorMap || !!material.sheenRoughnessMap) && !!material.displacementMap,
				fog: !!fog,
				useFog: material.fog === true,
				fogExp2: fog && fog.isFogExp2,
				flatShading: !!material.flatShading,
				sizeAttenuation: material.sizeAttenuation,
				logarithmicDepthBuffer: logarithmicDepthBuffer,
				skinning: object.isSkinnedMesh === true,
				morphTargets: geometry.morphAttributes.position !== undefined,
				morphNormals: geometry.morphAttributes.normal !== undefined,
				morphColors: geometry.morphAttributes.color !== undefined,
				morphTargetsCount: morphTargetsCount,
				morphTextureStride: morphTextureStride,
				numDirLights: lights.directional.length,
				numPointLights: lights.point.length,
				numSpotLights: lights.spot.length,
				numRectAreaLights: lights.rectArea.length,
				numHemiLights: lights.hemi.length,
				numDirLightShadows: lights.directionalShadowMap.length,
				numPointLightShadows: lights.pointShadowMap.length,
				numSpotLightShadows: lights.spotShadowMap.length,
				numClippingPlanes: clipping.numPlanes,
				numClipIntersection: clipping.numIntersection,
				dithering: material.dithering,
				shadowMapEnabled: renderer.shadowMap.enabled && shadows.length > 0,
				shadowMapType: renderer.shadowMap.type,
				toneMapping: material.toneMapped ? renderer.toneMapping : NoToneMapping,
				physicallyCorrectLights: renderer.physicallyCorrectLights,
				premultipliedAlpha: material.premultipliedAlpha,
				doubleSided: material.side === DoubleSide,
				flipSided: material.side === BackSide,
				useDepthPacking: !!material.depthPacking,
				depthPacking: material.depthPacking || 0,
				index0AttributeName: material.index0AttributeName,
				extensionDerivatives: material.extensions && material.extensions.derivatives,
				extensionFragDepth: material.extensions && material.extensions.fragDepth,
				extensionDrawBuffers: material.extensions && material.extensions.drawBuffers,
				extensionShaderTextureLOD: material.extensions && material.extensions.shaderTextureLOD,
				rendererExtensionFragDepth: isWebGL2 || extensions.has('EXT_frag_depth'),
				rendererExtensionDrawBuffers: isWebGL2 || extensions.has('WEBGL_draw_buffers'),
				rendererExtensionShaderTextureLod: isWebGL2 || extensions.has('EXT_shader_texture_lod'),
				customProgramCacheKey: material.customProgramCacheKey()
			};
			return parameters;
		}

		function getProgramCacheKey(parameters) {
			const array = [];

			if (parameters.shaderID) {
				array.push(parameters.shaderID);
			} else {
				array.push(parameters.customVertexShaderID);
				array.push(parameters.customFragmentShaderID);
			}

			if (parameters.defines !== undefined) {
				for (const name in parameters.defines) {
					array.push(name);
					array.push(parameters.defines[name]);
				}
			}

			if (parameters.isRawShaderMaterial === false) {
				getProgramCacheKeyParameters(array, parameters);
				getProgramCacheKeyBooleans(array, parameters);
				array.push(renderer.outputEncoding);
			}

			array.push(parameters.customProgramCacheKey);
			return array.join();
		}

		function getProgramCacheKeyParameters(array, parameters) {
			array.push(parameters.precision);
			array.push(parameters.outputEncoding);
			array.push(parameters.envMapMode);
			array.push(parameters.envMapCubeUVHeight);
			array.push(parameters.combine);
			array.push(parameters.vertexUvs);
			array.push(parameters.fogExp2);
			array.push(parameters.sizeAttenuation);
			array.push(parameters.morphTargetsCount);
			array.push(parameters.morphAttributeCount);
			array.push(parameters.numDirLights);
			array.push(parameters.numPointLights);
			array.push(parameters.numSpotLights);
			array.push(parameters.numHemiLights);
			array.push(parameters.numRectAreaLights);
			array.push(parameters.numDirLightShadows);
			array.push(parameters.numPointLightShadows);
			array.push(parameters.numSpotLightShadows);
			array.push(parameters.shadowMapType);
			array.push(parameters.toneMapping);
			array.push(parameters.numClippingPlanes);
			array.push(parameters.numClipIntersection);
			array.push(parameters.depthPacking);
		}

		function getProgramCacheKeyBooleans(array, parameters) {
			_programLayers.disableAll();

			if (parameters.isWebGL2) _programLayers.enable(0);
			if (parameters.supportsVertexTextures) _programLayers.enable(1);
			if (parameters.instancing) _programLayers.enable(2);
			if (parameters.instancingColor) _programLayers.enable(3);
			if (parameters.map) _programLayers.enable(4);
			if (parameters.matcap) _programLayers.enable(5);
			if (parameters.envMap) _programLayers.enable(6);
			if (parameters.lightMap) _programLayers.enable(7);
			if (parameters.aoMap) _programLayers.enable(8);
			if (parameters.emissiveMap) _programLayers.enable(9);
			if (parameters.bumpMap) _programLayers.enable(10);
			if (parameters.normalMap) _programLayers.enable(11);
			if (parameters.objectSpaceNormalMap) _programLayers.enable(12);
			if (parameters.tangentSpaceNormalMap) _programLayers.enable(13);
			if (parameters.clearcoat) _programLayers.enable(14);
			if (parameters.clearcoatMap) _programLayers.enable(15);
			if (parameters.clearcoatRoughnessMap) _programLayers.enable(16);
			if (parameters.clearcoatNormalMap) _programLayers.enable(17);
			if (parameters.iridescence) _programLayers.enable(18);
			if (parameters.iridescenceMap) _programLayers.enable(19);
			if (parameters.iridescenceThicknessMap) _programLayers.enable(20);
			if (parameters.displacementMap) _programLayers.enable(21);
			if (parameters.specularMap) _programLayers.enable(22);
			if (parameters.roughnessMap) _programLayers.enable(23);
			if (parameters.metalnessMap) _programLayers.enable(24);
			if (parameters.gradientMap) _programLayers.enable(25);
			if (parameters.alphaMap) _programLayers.enable(26);
			if (parameters.alphaTest) _programLayers.enable(27);
			if (parameters.vertexColors) _programLayers.enable(28);
			if (parameters.vertexAlphas) _programLayers.enable(29);
			if (parameters.vertexUvs) _programLayers.enable(30);
			if (parameters.vertexTangents) _programLayers.enable(31);
			if (parameters.uvsVertexOnly) _programLayers.enable(32);
			if (parameters.fog) _programLayers.enable(33);
			array.push(_programLayers.mask);

			_programLayers.disableAll();

			if (parameters.useFog) _programLayers.enable(0);
			if (parameters.flatShading) _programLayers.enable(1);
			if (parameters.logarithmicDepthBuffer) _programLayers.enable(2);
			if (parameters.skinning) _programLayers.enable(3);
			if (parameters.morphTargets) _programLayers.enable(4);
			if (parameters.morphNormals) _programLayers.enable(5);
			if (parameters.morphColors) _programLayers.enable(6);
			if (parameters.premultipliedAlpha) _programLayers.enable(7);
			if (parameters.shadowMapEnabled) _programLayers.enable(8);
			if (parameters.physicallyCorrectLights) _programLayers.enable(9);
			if (parameters.doubleSided) _programLayers.enable(10);
			if (parameters.flipSided) _programLayers.enable(11);
			if (parameters.useDepthPacking) _programLayers.enable(12);
			if (parameters.dithering) _programLayers.enable(13);
			if (parameters.specularIntensityMap) _programLayers.enable(14);
			if (parameters.specularColorMap) _programLayers.enable(15);
			if (parameters.transmission) _programLayers.enable(16);
			if (parameters.transmissionMap) _programLayers.enable(17);
			if (parameters.thicknessMap) _programLayers.enable(18);
			if (parameters.sheen) _programLayers.enable(19);
			if (parameters.sheenColorMap) _programLayers.enable(20);
			if (parameters.sheenRoughnessMap) _programLayers.enable(21);
			if (parameters.decodeVideoTexture) _programLayers.enable(22);
			if (parameters.opaque) _programLayers.enable(23);
			array.push(_programLayers.mask);
		}

		function getUniforms(material) {
			const shaderID = shaderIDs[material.type];
			let uniforms;

			if (shaderID) {
				const shader = ShaderLib[shaderID];
				uniforms = UniformsUtils.clone(shader.uniforms);
			} else {
				uniforms = material.uniforms;
			}

			return uniforms;
		}

		function acquireProgram(parameters, cacheKey) {
			let program; // Check if code has been already compiled

			for (let p = 0, pl = programs.length; p < pl; p++) {
				const preexistingProgram = programs[p];

				if (preexistingProgram.cacheKey === cacheKey) {
					program = preexistingProgram;
					++program.usedTimes;
					break;
				}
			}

			if (program === undefined) {
				program = new WebGLProgram(renderer, cacheKey, parameters, bindingStates);
				programs.push(program);
			}

			return program;
		}

		function releaseProgram(program) {
			if (--program.usedTimes === 0) {
				// Remove from unordered set
				const i = programs.indexOf(program);
				programs[i] = programs[programs.length - 1];
				programs.pop(); // Free WebGL resources

				program.destroy();
			}
		}

		function releaseShaderCache(material) {
			_customShaders.remove(material);
		}

		function dispose() {
			_customShaders.dispose();
		}

		return {
			getParameters: getParameters,
			getProgramCacheKey: getProgramCacheKey,
			getUniforms: getUniforms,
			acquireProgram: acquireProgram,
			releaseProgram: releaseProgram,
			releaseShaderCache: releaseShaderCache,
			// Exposed for resource monitoring & error feedback via renderer.info:
			programs: programs,
			dispose: dispose
		};
	}

	function WebGLProperties() {
		let properties = new WeakMap();

		function get(object) {
			let map = properties.get(object);

			if (map === undefined) {
				map = {};
				properties.set(object, map);
			}

			return map;
		}

		function remove(object) {
			properties.delete(object);
		}

		function update(object, key, value) {
			properties.get(object)[key] = value;
		}

		function dispose() {
			properties = new WeakMap();
		}

		return {
			get: get,
			remove: remove,
			update: update,
			dispose: dispose
		};
	}

	function painterSortStable(a, b) {
		if (a.groupOrder !== b.groupOrder) {
			return a.groupOrder - b.groupOrder;
		} else if (a.renderOrder !== b.renderOrder) {
			return a.renderOrder - b.renderOrder;
		} else if (a.material.id !== b.material.id) {
			return a.material.id - b.material.id;
		} else if (a.z !== b.z) {
			return a.z - b.z;
		} else {
			return a.id - b.id;
		}
	}

	function reversePainterSortStable(a, b) {
		if (a.groupOrder !== b.groupOrder) {
			return a.groupOrder - b.groupOrder;
		} else if (a.renderOrder !== b.renderOrder) {
			return a.renderOrder - b.renderOrder;
		} else if (a.z !== b.z) {
			return b.z - a.z;
		} else {
			return a.id - b.id;
		}
	}

	function WebGLRenderList() {
		const renderItems = [];
		let renderItemsIndex = 0;
		const opaque = [];
		const transmissive = [];
		const transparent = [];

		function init() {
			renderItemsIndex = 0;
			opaque.length = 0;
			transmissive.length = 0;
			transparent.length = 0;
		}

		function getNextRenderItem(object, geometry, material, groupOrder, z, group) {
			let renderItem = renderItems[renderItemsIndex];

			if (renderItem === undefined) {
				renderItem = {
					id: object.id,
					object: object,
					geometry: geometry,
					material: material,
					groupOrder: groupOrder,
					renderOrder: object.renderOrder,
					z: z,
					group: group
				};
				renderItems[renderItemsIndex] = renderItem;
			} else {
				renderItem.id = object.id;
				renderItem.object = object;
				renderItem.geometry = geometry;
				renderItem.material = material;
				renderItem.groupOrder = groupOrder;
				renderItem.renderOrder = object.renderOrder;
				renderItem.z = z;
				renderItem.group = group;
			}

			renderItemsIndex++;
			return renderItem;
		}

		function push(object, geometry, material, groupOrder, z, group) {
			const renderItem = getNextRenderItem(object, geometry, material, groupOrder, z, group);

			if (material.transmission > 0.0) {
				transmissive.push(renderItem);
			} else if (material.transparent === true) {
				transparent.push(renderItem);
			} else {
				opaque.push(renderItem);
			}
		}

		function unshift(object, geometry, material, groupOrder, z, group) {
			const renderItem = getNextRenderItem(object, geometry, material, groupOrder, z, group);

			if (material.transmission > 0.0) {
				transmissive.unshift(renderItem);
			} else if (material.transparent === true) {
				transparent.unshift(renderItem);
			} else {
				opaque.unshift(renderItem);
			}
		}

		function sort(customOpaqueSort, customTransparentSort) {
			if (opaque.length > 1) opaque.sort(customOpaqueSort || painterSortStable);
			if (transmissive.length > 1) transmissive.sort(customTransparentSort || reversePainterSortStable);
			if (transparent.length > 1) transparent.sort(customTransparentSort || reversePainterSortStable);
		}

		function finish() {
			// Clear references from inactive renderItems in the list
			for (let i = renderItemsIndex, il = renderItems.length; i < il; i++) {
				const renderItem = renderItems[i];
				if (renderItem.id === null) break;
				renderItem.id = null;
				renderItem.object = null;
				renderItem.geometry = null;
				renderItem.material = null;
				renderItem.group = null;
			}
		}

		return {
			opaque: opaque,
			transmissive: transmissive,
			transparent: transparent,
			init: init,
			push: push,
			unshift: unshift,
			finish: finish,
			sort: sort
		};
	}

	function WebGLRenderLists() {
		let lists = new WeakMap();

		function get(scene, renderCallDepth) {
			let list;

			if (lists.has(scene) === false) {
				list = new WebGLRenderList();
				lists.set(scene, [list]);
			} else {
				if (renderCallDepth >= lists.get(scene).length) {
					list = new WebGLRenderList();
					lists.get(scene).push(list);
				} else {
					list = lists.get(scene)[renderCallDepth];
				}
			}

			return list;
		}

		function dispose() {
			lists = new WeakMap();
		}

		return {
			get: get,
			dispose: dispose
		};
	}

	function UniformsCache() {
		const lights = {};
		return {
			get: function (light) {
				if (lights[light.id] !== undefined) {
					return lights[light.id];
				}

				let uniforms;

				switch (light.type) {
					case 'DirectionalLight':
						uniforms = {
							direction: new Vector3(),
							color: new Color()
						};
						break;

					case 'SpotLight':
						uniforms = {
							position: new Vector3(),
							direction: new Vector3(),
							color: new Color(),
							distance: 0,
							coneCos: 0,
							penumbraCos: 0,
							decay: 0
						};
						break;

					case 'PointLight':
						uniforms = {
							position: new Vector3(),
							color: new Color(),
							distance: 0,
							decay: 0
						};
						break;

					case 'HemisphereLight':
						uniforms = {
							direction: new Vector3(),
							skyColor: new Color(),
							groundColor: new Color()
						};
						break;

					case 'RectAreaLight':
						uniforms = {
							color: new Color(),
							position: new Vector3(),
							halfWidth: new Vector3(),
							halfHeight: new Vector3()
						};
						break;
				}

				lights[light.id] = uniforms;
				return uniforms;
			}
		};
	}

	function ShadowUniformsCache() {
		const lights = {};
		return {
			get: function (light) {
				if (lights[light.id] !== undefined) {
					return lights[light.id];
				}

				let uniforms;

				switch (light.type) {
					case 'DirectionalLight':
						uniforms = {
							shadowBias: 0,
							shadowNormalBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2()
						};
						break;

					case 'SpotLight':
						uniforms = {
							shadowBias: 0,
							shadowNormalBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2()
						};
						break;

					case 'PointLight':
						uniforms = {
							shadowBias: 0,
							shadowNormalBias: 0,
							shadowRadius: 1,
							shadowMapSize: new Vector2(),
							shadowCameraNear: 1,
							shadowCameraFar: 1000
						};
						break;
					// TODO (abelnation): set RectAreaLight shadow uniforms
				}

				lights[light.id] = uniforms;
				return uniforms;
			}
		};
	}

	let nextVersion = 0;

	function shadowCastingLightsFirst(lightA, lightB) {
		return (lightB.castShadow ? 1 : 0) - (lightA.castShadow ? 1 : 0);
	}

	function WebGLLights(extensions, capabilities) {
		const cache = new UniformsCache();
		const shadowCache = ShadowUniformsCache();
		const state = {
			version: 0,
			hash: {
				directionalLength: -1,
				pointLength: -1,
				spotLength: -1,
				rectAreaLength: -1,
				hemiLength: -1,
				numDirectionalShadows: -1,
				numPointShadows: -1,
				numSpotShadows: -1
			},
			ambient: [0, 0, 0],
			probe: [],
			directional: [],
			directionalShadow: [],
			directionalShadowMap: [],
			directionalShadowMatrix: [],
			spot: [],
			spotShadow: [],
			spotShadowMap: [],
			spotShadowMatrix: [],
			rectArea: [],
			rectAreaLTC1: null,
			rectAreaLTC2: null,
			point: [],
			pointShadow: [],
			pointShadowMap: [],
			pointShadowMatrix: [],
			hemi: []
		};

		for (let i = 0; i < 9; i++) state.probe.push(new Vector3());

		const vector3 = new Vector3();
		const matrix4 = new Matrix4();
		const matrix42 = new Matrix4();

		function setup(lights, physicallyCorrectLights) {
			let r = 0,
					g = 0,
					b = 0;

			for (let i = 0; i < 9; i++) state.probe[i].set(0, 0, 0);

			let directionalLength = 0;
			let pointLength = 0;
			let spotLength = 0;
			let rectAreaLength = 0;
			let hemiLength = 0;
			let numDirectionalShadows = 0;
			let numPointShadows = 0;
			let numSpotShadows = 0;
			lights.sort(shadowCastingLightsFirst); // artist-friendly light intensity scaling factor

			const scaleFactor = physicallyCorrectLights !== true ? Math.PI : 1;

			for (let i = 0, l = lights.length; i < l; i++) {
				const light = lights[i];
				const color = light.color;
				const intensity = light.intensity;
				const distance = light.distance;
				const shadowMap = light.shadow && light.shadow.map ? light.shadow.map.texture : null;

				if (light.isAmbientLight) {
					r += color.r * intensity * scaleFactor;
					g += color.g * intensity * scaleFactor;
					b += color.b * intensity * scaleFactor;
				} else if (light.isLightProbe) {
					for (let j = 0; j < 9; j++) {
						state.probe[j].addScaledVector(light.sh.coefficients[j], intensity);
					}
				} else if (light.isDirectionalLight) {
					const uniforms = cache.get(light);
					uniforms.color.copy(light.color).multiplyScalar(light.intensity * scaleFactor);

					if (light.castShadow) {
						const shadow = light.shadow;
						const shadowUniforms = shadowCache.get(light);
						shadowUniforms.shadowBias = shadow.bias;
						shadowUniforms.shadowNormalBias = shadow.normalBias;
						shadowUniforms.shadowRadius = shadow.radius;
						shadowUniforms.shadowMapSize = shadow.mapSize;
						state.directionalShadow[directionalLength] = shadowUniforms;
						state.directionalShadowMap[directionalLength] = shadowMap;
						state.directionalShadowMatrix[directionalLength] = light.shadow.matrix;
						numDirectionalShadows++;
					}

					state.directional[directionalLength] = uniforms;
					directionalLength++;
				} else if (light.isSpotLight) {
					const uniforms = cache.get(light);
					uniforms.position.setFromMatrixPosition(light.matrixWorld);
					uniforms.color.copy(color).multiplyScalar(intensity * scaleFactor);
					uniforms.distance = distance;
					uniforms.coneCos = Math.cos(light.angle);
					uniforms.penumbraCos = Math.cos(light.angle * (1 - light.penumbra));
					uniforms.decay = light.decay;

					if (light.castShadow) {
						const shadow = light.shadow;
						const shadowUniforms = shadowCache.get(light);
						shadowUniforms.shadowBias = shadow.bias;
						shadowUniforms.shadowNormalBias = shadow.normalBias;
						shadowUniforms.shadowRadius = shadow.radius;
						shadowUniforms.shadowMapSize = shadow.mapSize;
						state.spotShadow[spotLength] = shadowUniforms;
						state.spotShadowMap[spotLength] = shadowMap;
						state.spotShadowMatrix[spotLength] = light.shadow.matrix;
						numSpotShadows++;
					}

					state.spot[spotLength] = uniforms;
					spotLength++;
				} else if (light.isRectAreaLight) {
					const uniforms = cache.get(light); // (a) intensity is the total visible light emitted
					//uniforms.color.copy( color ).multiplyScalar( intensity / ( light.width * light.height * Math.PI ) );
					// (b) intensity is the brightness of the light

					uniforms.color.copy(color).multiplyScalar(intensity);
					uniforms.halfWidth.set(light.width * 0.5, 0.0, 0.0);
					uniforms.halfHeight.set(0.0, light.height * 0.5, 0.0);
					state.rectArea[rectAreaLength] = uniforms;
					rectAreaLength++;
				} else if (light.isPointLight) {
					const uniforms = cache.get(light);
					uniforms.color.copy(light.color).multiplyScalar(light.intensity * scaleFactor);
					uniforms.distance = light.distance;
					uniforms.decay = light.decay;

					if (light.castShadow) {
						const shadow = light.shadow;
						const shadowUniforms = shadowCache.get(light);
						shadowUniforms.shadowBias = shadow.bias;
						shadowUniforms.shadowNormalBias = shadow.normalBias;
						shadowUniforms.shadowRadius = shadow.radius;
						shadowUniforms.shadowMapSize = shadow.mapSize;
						shadowUniforms.shadowCameraNear = shadow.camera.near;
						shadowUniforms.shadowCameraFar = shadow.camera.far;
						state.pointShadow[pointLength] = shadowUniforms;
						state.pointShadowMap[pointLength] = shadowMap;
						state.pointShadowMatrix[pointLength] = light.shadow.matrix;
						numPointShadows++;
					}

					state.point[pointLength] = uniforms;
					pointLength++;
				} else if (light.isHemisphereLight) {
					const uniforms = cache.get(light);
					uniforms.skyColor.copy(light.color).multiplyScalar(intensity * scaleFactor);
					uniforms.groundColor.copy(light.groundColor).multiplyScalar(intensity * scaleFactor);
					state.hemi[hemiLength] = uniforms;
					hemiLength++;
				}
			}

			if (rectAreaLength > 0) {
				if (capabilities.isWebGL2) {
					// WebGL 2
					state.rectAreaLTC1 = UniformsLib.LTC_FLOAT_1;
					state.rectAreaLTC2 = UniformsLib.LTC_FLOAT_2;
				} else {
					// WebGL 1
					if (extensions.has('OES_texture_float_linear') === true) {
						state.rectAreaLTC1 = UniformsLib.LTC_FLOAT_1;
						state.rectAreaLTC2 = UniformsLib.LTC_FLOAT_2;
					} else if (extensions.has('OES_texture_half_float_linear') === true) {
						state.rectAreaLTC1 = UniformsLib.LTC_HALF_1;
						state.rectAreaLTC2 = UniformsLib.LTC_HALF_2;
					} else {
						console.error('THREE.WebGLRenderer: Unable to use RectAreaLight. Missing WebGL extensions.');
					}
				}
			}

			state.ambient[0] = r;
			state.ambient[1] = g;
			state.ambient[2] = b;
			const hash = state.hash;

			if (hash.directionalLength !== directionalLength || hash.pointLength !== pointLength || hash.spotLength !== spotLength || hash.rectAreaLength !== rectAreaLength || hash.hemiLength !== hemiLength || hash.numDirectionalShadows !== numDirectionalShadows || hash.numPointShadows !== numPointShadows || hash.numSpotShadows !== numSpotShadows) {
				state.directional.length = directionalLength;
				state.spot.length = spotLength;
				state.rectArea.length = rectAreaLength;
				state.point.length = pointLength;
				state.hemi.length = hemiLength;
				state.directionalShadow.length = numDirectionalShadows;
				state.directionalShadowMap.length = numDirectionalShadows;
				state.pointShadow.length = numPointShadows;
				state.pointShadowMap.length = numPointShadows;
				state.spotShadow.length = numSpotShadows;
				state.spotShadowMap.length = numSpotShadows;
				state.directionalShadowMatrix.length = numDirectionalShadows;
				state.pointShadowMatrix.length = numPointShadows;
				state.spotShadowMatrix.length = numSpotShadows;
				hash.directionalLength = directionalLength;
				hash.pointLength = pointLength;
				hash.spotLength = spotLength;
				hash.rectAreaLength = rectAreaLength;
				hash.hemiLength = hemiLength;
				hash.numDirectionalShadows = numDirectionalShadows;
				hash.numPointShadows = numPointShadows;
				hash.numSpotShadows = numSpotShadows;
				state.version = nextVersion++;
			}
		}

		function setupView(lights, camera) {
			let directionalLength = 0;
			let pointLength = 0;
			let spotLength = 0;
			let rectAreaLength = 0;
			let hemiLength = 0;
			const viewMatrix = camera.matrixWorldInverse;

			for (let i = 0, l = lights.length; i < l; i++) {
				const light = lights[i];

				if (light.isDirectionalLight) {
					const uniforms = state.directional[directionalLength];
					uniforms.direction.setFromMatrixPosition(light.matrixWorld);
					vector3.setFromMatrixPosition(light.target.matrixWorld);
					uniforms.direction.sub(vector3);
					uniforms.direction.transformDirection(viewMatrix);
					directionalLength++;
				} else if (light.isSpotLight) {
					const uniforms = state.spot[spotLength];
					uniforms.position.setFromMatrixPosition(light.matrixWorld);
					uniforms.position.applyMatrix4(viewMatrix);
					uniforms.direction.setFromMatrixPosition(light.matrixWorld);
					vector3.setFromMatrixPosition(light.target.matrixWorld);
					uniforms.direction.sub(vector3);
					uniforms.direction.transformDirection(viewMatrix);
					spotLength++;
				} else if (light.isRectAreaLight) {
					const uniforms = state.rectArea[rectAreaLength];
					uniforms.position.setFromMatrixPosition(light.matrixWorld);
					uniforms.position.applyMatrix4(viewMatrix); // extract local rotation of light to derive width/height half vectors

					matrix42.identity();
					matrix4.copy(light.matrixWorld);
					matrix4.premultiply(viewMatrix);
					matrix42.extractRotation(matrix4);
					uniforms.halfWidth.set(light.width * 0.5, 0.0, 0.0);
					uniforms.halfHeight.set(0.0, light.height * 0.5, 0.0);
					uniforms.halfWidth.applyMatrix4(matrix42);
					uniforms.halfHeight.applyMatrix4(matrix42);
					rectAreaLength++;
				} else if (light.isPointLight) {
					const uniforms = state.point[pointLength];
					uniforms.position.setFromMatrixPosition(light.matrixWorld);
					uniforms.position.applyMatrix4(viewMatrix);
					pointLength++;
				} else if (light.isHemisphereLight) {
					const uniforms = state.hemi[hemiLength];
					uniforms.direction.setFromMatrixPosition(light.matrixWorld);
					uniforms.direction.transformDirection(viewMatrix);
					hemiLength++;
				}
			}
		}

		return {
			setup: setup,
			setupView: setupView,
			state: state
		};
	}

	function WebGLRenderState(extensions, capabilities) {
		const lights = new WebGLLights(extensions, capabilities);
		const lightsArray = [];
		const shadowsArray = [];

		function init() {
			lightsArray.length = 0;
			shadowsArray.length = 0;
		}

		function pushLight(light) {
			lightsArray.push(light);
		}

		function pushShadow(shadowLight) {
			shadowsArray.push(shadowLight);
		}

		function setupLights(physicallyCorrectLights) {
			lights.setup(lightsArray, physicallyCorrectLights);
		}

		function setupLightsView(camera) {
			lights.setupView(lightsArray, camera);
		}

		const state = {
			lightsArray: lightsArray,
			shadowsArray: shadowsArray,
			lights: lights
		};
		return {
			init: init,
			state: state,
			setupLights: setupLights,
			setupLightsView: setupLightsView,
			pushLight: pushLight,
			pushShadow: pushShadow
		};
	}

	function WebGLRenderStates(extensions, capabilities) {
		let renderStates = new WeakMap();

		function get(scene, renderCallDepth = 0) {
			let renderState;

			if (renderStates.has(scene) === false) {
				renderState = new WebGLRenderState(extensions, capabilities);
				renderStates.set(scene, [renderState]);
			} else {
				if (renderCallDepth >= renderStates.get(scene).length) {
					renderState = new WebGLRenderState(extensions, capabilities);
					renderStates.get(scene).push(renderState);
				} else {
					renderState = renderStates.get(scene)[renderCallDepth];
				}
			}

			return renderState;
		}

		function dispose() {
			renderStates = new WeakMap();
		}

		return {
			get: get,
			dispose: dispose
		};
	}

	class MeshDepthMaterial extends Material {
		constructor(parameters) {
			super();
			this.isMeshDepthMaterial = true;
			this.type = 'MeshDepthMaterial';
			this.depthPacking = BasicDepthPacking;
			this.map = null;
			this.alphaMap = null;
			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;
			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.depthPacking = source.depthPacking;
			this.map = source.map;
			this.alphaMap = source.alphaMap;
			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;
			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			return this;
		}

	}

	class MeshDistanceMaterial extends Material {
		constructor(parameters) {
			super();
			this.isMeshDistanceMaterial = true;
			this.type = 'MeshDistanceMaterial';
			this.referencePosition = new Vector3();
			this.nearDistance = 1;
			this.farDistance = 1000;
			this.map = null;
			this.alphaMap = null;
			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.referencePosition.copy(source.referencePosition);
			this.nearDistance = source.nearDistance;
			this.farDistance = source.farDistance;
			this.map = source.map;
			this.alphaMap = source.alphaMap;
			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;
			return this;
		}

	}

	const vertex = "void main() {\n\tgl_Position = vec4( position, 1.0 );\n}";
	const fragment = "uniform sampler2D shadow_pass;\nuniform vec2 resolution;\nuniform float radius;\n#include <packing>\nvoid main() {\n\tconst float samples = float( VSM_SAMPLES );\n\tfloat mean = 0.0;\n\tfloat squared_mean = 0.0;\n\tfloat uvStride = samples <= 1.0 ? 0.0 : 2.0 / ( samples - 1.0 );\n\tfloat uvStart = samples <= 1.0 ? 0.0 : - 1.0;\n\tfor ( float i = 0.0; i < samples; i ++ ) {\n\t\tfloat uvOffset = uvStart + i * uvStride;\n\t\t#ifdef HORIZONTAL_PASS\n\t\t\tvec2 distribution = unpackRGBATo2Half( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( uvOffset, 0.0 ) * radius ) / resolution ) );\n\t\t\tmean += distribution.x;\n\t\t\tsquared_mean += distribution.y * distribution.y + distribution.x * distribution.x;\n\t\t#else\n\t\t\tfloat depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( 0.0, uvOffset ) * radius ) / resolution ) );\n\t\t\tmean += depth;\n\t\t\tsquared_mean += depth * depth;\n\t\t#endif\n\t}\n\tmean = mean / samples;\n\tsquared_mean = squared_mean / samples;\n\tfloat std_dev = sqrt( squared_mean - mean * mean );\n\tgl_FragColor = pack2HalfToRGBA( vec2( mean, std_dev ) );\n}";

	function WebGLShadowMap(_renderer, _objects, _capabilities) {
		let _frustum = new Frustum();

		const _shadowMapSize = new Vector2(),
					_viewportSize = new Vector2(),
					_viewport = new Vector4(),
					_depthMaterial = new MeshDepthMaterial({
			depthPacking: RGBADepthPacking
		}),
					_distanceMaterial = new MeshDistanceMaterial(),
					_materialCache = {},
					_maxTextureSize = _capabilities.maxTextureSize;

		const shadowSide = {
			0: BackSide,
			1: FrontSide,
			2: DoubleSide
		};
		const shadowMaterialVertical = new ShaderMaterial({
			defines: {
				VSM_SAMPLES: 8
			},
			uniforms: {
				shadow_pass: {
					value: null
				},
				resolution: {
					value: new Vector2()
				},
				radius: {
					value: 4.0
				}
			},
			vertexShader: vertex,
			fragmentShader: fragment
		});
		const shadowMaterialHorizontal = shadowMaterialVertical.clone();
		shadowMaterialHorizontal.defines.HORIZONTAL_PASS = 1;
		const fullScreenTri = new BufferGeometry();
		fullScreenTri.setAttribute('position', new BufferAttribute(new Float32Array([-1, -1, 0.5, 3, -1, 0.5, -1, 3, 0.5]), 3));
		const fullScreenMesh = new Mesh(fullScreenTri, shadowMaterialVertical);
		const scope = this;
		this.enabled = false;
		this.autoUpdate = true;
		this.needsUpdate = false;
		this.type = PCFShadowMap;

		this.render = function (lights, scene, camera) {
			if (scope.enabled === false) return;
			if (scope.autoUpdate === false && scope.needsUpdate === false) return;
			if (lights.length === 0) return;

			const currentRenderTarget = _renderer.getRenderTarget();

			const activeCubeFace = _renderer.getActiveCubeFace();

			const activeMipmapLevel = _renderer.getActiveMipmapLevel();

			const _state = _renderer.state; // Set GL state for depth map.

			_state.setBlending(NoBlending);

			_state.buffers.color.setClear(1, 1, 1, 1);

			_state.buffers.depth.setTest(true);

			_state.setScissorTest(false); // render depth map


			for (let i = 0, il = lights.length; i < il; i++) {
				const light = lights[i];
				const shadow = light.shadow;

				if (shadow === undefined) {
					console.warn('THREE.WebGLShadowMap:', light, 'has no shadow.');
					continue;
				}

				if (shadow.autoUpdate === false && shadow.needsUpdate === false) continue;

				_shadowMapSize.copy(shadow.mapSize);

				const shadowFrameExtents = shadow.getFrameExtents();

				_shadowMapSize.multiply(shadowFrameExtents);

				_viewportSize.copy(shadow.mapSize);

				if (_shadowMapSize.x > _maxTextureSize || _shadowMapSize.y > _maxTextureSize) {
					if (_shadowMapSize.x > _maxTextureSize) {
						_viewportSize.x = Math.floor(_maxTextureSize / shadowFrameExtents.x);
						_shadowMapSize.x = _viewportSize.x * shadowFrameExtents.x;
						shadow.mapSize.x = _viewportSize.x;
					}

					if (_shadowMapSize.y > _maxTextureSize) {
						_viewportSize.y = Math.floor(_maxTextureSize / shadowFrameExtents.y);
						_shadowMapSize.y = _viewportSize.y * shadowFrameExtents.y;
						shadow.mapSize.y = _viewportSize.y;
					}
				}

				if (shadow.map === null) {
					const pars = this.type !== VSMShadowMap ? {
						minFilter: NearestFilter,
						magFilter: NearestFilter
					} : {};
					shadow.map = new WebGLRenderTarget(_shadowMapSize.x, _shadowMapSize.y, pars);
					shadow.map.texture.name = light.name + '.shadowMap';
					shadow.camera.updateProjectionMatrix();
				}

				_renderer.setRenderTarget(shadow.map);

				_renderer.clear();

				const viewportCount = shadow.getViewportCount();

				for (let vp = 0; vp < viewportCount; vp++) {
					const viewport = shadow.getViewport(vp);

					_viewport.set(_viewportSize.x * viewport.x, _viewportSize.y * viewport.y, _viewportSize.x * viewport.z, _viewportSize.y * viewport.w);

					_state.viewport(_viewport);

					shadow.updateMatrices(light, vp);
					_frustum = shadow.getFrustum();
					renderObject(scene, camera, shadow.camera, light, this.type);
				} // do blur pass for VSM


				if (shadow.isPointLightShadow !== true && this.type === VSMShadowMap) {
					VSMPass(shadow, camera);
				}

				shadow.needsUpdate = false;
			}

			scope.needsUpdate = false;

			_renderer.setRenderTarget(currentRenderTarget, activeCubeFace, activeMipmapLevel);
		};

		function VSMPass(shadow, camera) {
			const geometry = _objects.update(fullScreenMesh);

			if (shadowMaterialVertical.defines.VSM_SAMPLES !== shadow.blurSamples) {
				shadowMaterialVertical.defines.VSM_SAMPLES = shadow.blurSamples;
				shadowMaterialHorizontal.defines.VSM_SAMPLES = shadow.blurSamples;
				shadowMaterialVertical.needsUpdate = true;
				shadowMaterialHorizontal.needsUpdate = true;
			}

			if (shadow.mapPass === null) {
				shadow.mapPass = new WebGLRenderTarget(_shadowMapSize.x, _shadowMapSize.y);
			} // vertical pass


			shadowMaterialVertical.uniforms.shadow_pass.value = shadow.map.texture;
			shadowMaterialVertical.uniforms.resolution.value = shadow.mapSize;
			shadowMaterialVertical.uniforms.radius.value = shadow.radius;

			_renderer.setRenderTarget(shadow.mapPass);

			_renderer.clear();

			_renderer.renderBufferDirect(camera, null, geometry, shadowMaterialVertical, fullScreenMesh, null); // horizontal pass


			shadowMaterialHorizontal.uniforms.shadow_pass.value = shadow.mapPass.texture;
			shadowMaterialHorizontal.uniforms.resolution.value = shadow.mapSize;
			shadowMaterialHorizontal.uniforms.radius.value = shadow.radius;

			_renderer.setRenderTarget(shadow.map);

			_renderer.clear();

			_renderer.renderBufferDirect(camera, null, geometry, shadowMaterialHorizontal, fullScreenMesh, null);
		}

		function getDepthMaterial(object, material, light, shadowCameraNear, shadowCameraFar, type) {
			let result = null;
			const customMaterial = light.isPointLight === true ? object.customDistanceMaterial : object.customDepthMaterial;

			if (customMaterial !== undefined) {
				result = customMaterial;
			} else {
				result = light.isPointLight === true ? _distanceMaterial : _depthMaterial;
			}

			if (_renderer.localClippingEnabled && material.clipShadows === true && Array.isArray(material.clippingPlanes) && material.clippingPlanes.length !== 0 || material.displacementMap && material.displacementScale !== 0 || material.alphaMap && material.alphaTest > 0) {
				// in this case we need a unique material instance reflecting the
				// appropriate state
				const keyA = result.uuid,
							keyB = material.uuid;
				let materialsForVariant = _materialCache[keyA];

				if (materialsForVariant === undefined) {
					materialsForVariant = {};
					_materialCache[keyA] = materialsForVariant;
				}

				let cachedMaterial = materialsForVariant[keyB];

				if (cachedMaterial === undefined) {
					cachedMaterial = result.clone();
					materialsForVariant[keyB] = cachedMaterial;
				}

				result = cachedMaterial;
			}

			result.visible = material.visible;
			result.wireframe = material.wireframe;

			if (type === VSMShadowMap) {
				result.side = material.shadowSide !== null ? material.shadowSide : material.side;
			} else {
				result.side = material.shadowSide !== null ? material.shadowSide : shadowSide[material.side];
			}

			result.alphaMap = material.alphaMap;
			result.alphaTest = material.alphaTest;
			result.clipShadows = material.clipShadows;
			result.clippingPlanes = material.clippingPlanes;
			result.clipIntersection = material.clipIntersection;
			result.displacementMap = material.displacementMap;
			result.displacementScale = material.displacementScale;
			result.displacementBias = material.displacementBias;
			result.wireframeLinewidth = material.wireframeLinewidth;
			result.linewidth = material.linewidth;

			if (light.isPointLight === true && result.isMeshDistanceMaterial === true) {
				result.referencePosition.setFromMatrixPosition(light.matrixWorld);
				result.nearDistance = shadowCameraNear;
				result.farDistance = shadowCameraFar;
			}

			return result;
		}

		function renderObject(object, camera, shadowCamera, light, type) {
			if (object.visible === false) return;
			const visible = object.layers.test(camera.layers);

			if (visible && (object.isMesh || object.isLine || object.isPoints)) {
				if ((object.castShadow || object.receiveShadow && type === VSMShadowMap) && (!object.frustumCulled || _frustum.intersectsObject(object))) {
					object.modelViewMatrix.multiplyMatrices(shadowCamera.matrixWorldInverse, object.matrixWorld);

					const geometry = _objects.update(object);

					const material = object.material;

					if (Array.isArray(material)) {
						const groups = geometry.groups;

						for (let k = 0, kl = groups.length; k < kl; k++) {
							const group = groups[k];
							const groupMaterial = material[group.materialIndex];

							if (groupMaterial && groupMaterial.visible) {
								const depthMaterial = getDepthMaterial(object, groupMaterial, light, shadowCamera.near, shadowCamera.far, type);

								_renderer.renderBufferDirect(shadowCamera, null, geometry, depthMaterial, object, group);
							}
						}
					} else if (material.visible) {
						const depthMaterial = getDepthMaterial(object, material, light, shadowCamera.near, shadowCamera.far, type);

						_renderer.renderBufferDirect(shadowCamera, null, geometry, depthMaterial, object, null);
					}
				}
			}

			const children = object.children;

			for (let i = 0, l = children.length; i < l; i++) {
				renderObject(children[i], camera, shadowCamera, light, type);
			}
		}
	}

	function WebGLState(gl, extensions, capabilities) {
		const isWebGL2 = capabilities.isWebGL2;

		function ColorBuffer() {
			let locked = false;
			const color = new Vector4();
			let currentColorMask = null;
			const currentColorClear = new Vector4(0, 0, 0, 0);
			return {
				setMask: function (colorMask) {
					if (currentColorMask !== colorMask && !locked) {
						gl.colorMask(colorMask, colorMask, colorMask, colorMask);
						currentColorMask = colorMask;
					}
				},
				setLocked: function (lock) {
					locked = lock;
				},
				setClear: function (r, g, b, a, premultipliedAlpha) {
					if (premultipliedAlpha === true) {
						r *= a;
						g *= a;
						b *= a;
					}

					color.set(r, g, b, a);

					if (currentColorClear.equals(color) === false) {
						gl.clearColor(r, g, b, a);
						currentColorClear.copy(color);
					}
				},
				reset: function () {
					locked = false;
					currentColorMask = null;
					currentColorClear.set(-1, 0, 0, 0); // set to invalid state
				}
			};
		}

		function DepthBuffer() {
			let locked = false;
			let currentDepthMask = null;
			let currentDepthFunc = null;
			let currentDepthClear = null;
			return {
				setTest: function (depthTest) {
					if (depthTest) {
						enable(gl.DEPTH_TEST);
					} else {
						disable(gl.DEPTH_TEST);
					}
				},
				setMask: function (depthMask) {
					if (currentDepthMask !== depthMask && !locked) {
						gl.depthMask(depthMask);
						currentDepthMask = depthMask;
					}
				},
				setFunc: function (depthFunc) {
					if (currentDepthFunc !== depthFunc) {
						if (depthFunc) {
							switch (depthFunc) {
								case NeverDepth:
									gl.depthFunc(gl.NEVER);
									break;

								case AlwaysDepth:
									gl.depthFunc(gl.ALWAYS);
									break;

								case LessDepth:
									gl.depthFunc(gl.LESS);
									break;

								case LessEqualDepth:
									gl.depthFunc(gl.LEQUAL);
									break;

								case EqualDepth:
									gl.depthFunc(gl.EQUAL);
									break;

								case GreaterEqualDepth:
									gl.depthFunc(gl.GEQUAL);
									break;

								case GreaterDepth:
									gl.depthFunc(gl.GREATER);
									break;

								case NotEqualDepth:
									gl.depthFunc(gl.NOTEQUAL);
									break;

								default:
									gl.depthFunc(gl.LEQUAL);
							}
						} else {
							gl.depthFunc(gl.LEQUAL);
						}

						currentDepthFunc = depthFunc;
					}
				},
				setLocked: function (lock) {
					locked = lock;
				},
				setClear: function (depth) {
					if (currentDepthClear !== depth) {
						gl.clearDepth(depth);
						currentDepthClear = depth;
					}
				},
				reset: function () {
					locked = false;
					currentDepthMask = null;
					currentDepthFunc = null;
					currentDepthClear = null;
				}
			};
		}

		function StencilBuffer() {
			let locked = false;
			let currentStencilMask = null;
			let currentStencilFunc = null;
			let currentStencilRef = null;
			let currentStencilFuncMask = null;
			let currentStencilFail = null;
			let currentStencilZFail = null;
			let currentStencilZPass = null;
			let currentStencilClear = null;
			return {
				setTest: function (stencilTest) {
					if (!locked) {
						if (stencilTest) {
							enable(gl.STENCIL_TEST);
						} else {
							disable(gl.STENCIL_TEST);
						}
					}
				},
				setMask: function (stencilMask) {
					if (currentStencilMask !== stencilMask && !locked) {
						gl.stencilMask(stencilMask);
						currentStencilMask = stencilMask;
					}
				},
				setFunc: function (stencilFunc, stencilRef, stencilMask) {
					if (currentStencilFunc !== stencilFunc || currentStencilRef !== stencilRef || currentStencilFuncMask !== stencilMask) {
						gl.stencilFunc(stencilFunc, stencilRef, stencilMask);
						currentStencilFunc = stencilFunc;
						currentStencilRef = stencilRef;
						currentStencilFuncMask = stencilMask;
					}
				},
				setOp: function (stencilFail, stencilZFail, stencilZPass) {
					if (currentStencilFail !== stencilFail || currentStencilZFail !== stencilZFail || currentStencilZPass !== stencilZPass) {
						gl.stencilOp(stencilFail, stencilZFail, stencilZPass);
						currentStencilFail = stencilFail;
						currentStencilZFail = stencilZFail;
						currentStencilZPass = stencilZPass;
					}
				},
				setLocked: function (lock) {
					locked = lock;
				},
				setClear: function (stencil) {
					if (currentStencilClear !== stencil) {
						gl.clearStencil(stencil);
						currentStencilClear = stencil;
					}
				},
				reset: function () {
					locked = false;
					currentStencilMask = null;
					currentStencilFunc = null;
					currentStencilRef = null;
					currentStencilFuncMask = null;
					currentStencilFail = null;
					currentStencilZFail = null;
					currentStencilZPass = null;
					currentStencilClear = null;
				}
			};
		} //


		const colorBuffer = new ColorBuffer();
		const depthBuffer = new DepthBuffer();
		const stencilBuffer = new StencilBuffer();
		const uboBindings = new WeakMap();
		const uboProgamMap = new WeakMap();
		let enabledCapabilities = {};
		let currentBoundFramebuffers = {};
		let currentDrawbuffers = new WeakMap();
		let defaultDrawbuffers = [];
		let currentProgram = null;
		let currentBlendingEnabled = false;
		let currentBlending = null;
		let currentBlendEquation = null;
		let currentBlendSrc = null;
		let currentBlendDst = null;
		let currentBlendEquationAlpha = null;
		let currentBlendSrcAlpha = null;
		let currentBlendDstAlpha = null;
		let currentPremultipledAlpha = false;
		let currentFlipSided = null;
		let currentCullFace = null;
		let currentLineWidth = null;
		let currentPolygonOffsetFactor = null;
		let currentPolygonOffsetUnits = null;
		const maxTextures = gl.getParameter(gl.MAX_COMBINED_TEXTURE_IMAGE_UNITS);
		let lineWidthAvailable = false;
		let version = 0;
		const glVersion = gl.getParameter(gl.VERSION);

		if (glVersion.indexOf('WebGL') !== -1) {
			version = parseFloat(/^WebGL (\d)/.exec(glVersion)[1]);
			lineWidthAvailable = version >= 1.0;
		} else if (glVersion.indexOf('OpenGL ES') !== -1) {
			version = parseFloat(/^OpenGL ES (\d)/.exec(glVersion)[1]);
			lineWidthAvailable = version >= 2.0;
		}

		let currentTextureSlot = null;
		let currentBoundTextures = {};
		const scissorParam = gl.getParameter(gl.SCISSOR_BOX);
		const viewportParam = gl.getParameter(gl.VIEWPORT);
		const currentScissor = new Vector4().fromArray(scissorParam);
		const currentViewport = new Vector4().fromArray(viewportParam);

		function createTexture(type, target, count) {
			const data = new Uint8Array(4); // 4 is required to match default unpack alignment of 4.

			const texture = gl.createTexture();
			gl.bindTexture(type, texture);
			gl.texParameteri(type, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
			gl.texParameteri(type, gl.TEXTURE_MAG_FILTER, gl.NEAREST);

			for (let i = 0; i < count; i++) {
				gl.texImage2D(target + i, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, data);
			}

			return texture;
		}

		const emptyTextures = {};
		emptyTextures[gl.TEXTURE_2D] = createTexture(gl.TEXTURE_2D, gl.TEXTURE_2D, 1);
		emptyTextures[gl.TEXTURE_CUBE_MAP] = createTexture(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_CUBE_MAP_POSITIVE_X, 6); // init

		colorBuffer.setClear(0, 0, 0, 1);
		depthBuffer.setClear(1);
		stencilBuffer.setClear(0);
		enable(gl.DEPTH_TEST);
		depthBuffer.setFunc(LessEqualDepth);
		setFlipSided(false);
		setCullFace(CullFaceBack);
		enable(gl.CULL_FACE);
		setBlending(NoBlending); //

		function enable(id) {
			if (enabledCapabilities[id] !== true) {
				gl.enable(id);
				enabledCapabilities[id] = true;
			}
		}

		function disable(id) {
			if (enabledCapabilities[id] !== false) {
				gl.disable(id);
				enabledCapabilities[id] = false;
			}
		}

		function bindFramebuffer(target, framebuffer) {
			if (currentBoundFramebuffers[target] !== framebuffer) {
				gl.bindFramebuffer(target, framebuffer);
				currentBoundFramebuffers[target] = framebuffer;

				if (isWebGL2) {
					// gl.DRAW_FRAMEBUFFER is equivalent to gl.FRAMEBUFFER
					if (target === gl.DRAW_FRAMEBUFFER) {
						currentBoundFramebuffers[gl.FRAMEBUFFER] = framebuffer;
					}

					if (target === gl.FRAMEBUFFER) {
						currentBoundFramebuffers[gl.DRAW_FRAMEBUFFER] = framebuffer;
					}
				}

				return true;
			}

			return false;
		}

		function drawBuffers(renderTarget, framebuffer) {
			let drawBuffers = defaultDrawbuffers;
			let needsUpdate = false;

			if (renderTarget) {
				drawBuffers = currentDrawbuffers.get(framebuffer);

				if (drawBuffers === undefined) {
					drawBuffers = [];
					currentDrawbuffers.set(framebuffer, drawBuffers);
				}

				if (renderTarget.isWebGLMultipleRenderTargets) {
					const textures = renderTarget.texture;

					if (drawBuffers.length !== textures.length || drawBuffers[0] !== gl.COLOR_ATTACHMENT0) {
						for (let i = 0, il = textures.length; i < il; i++) {
							drawBuffers[i] = gl.COLOR_ATTACHMENT0 + i;
						}

						drawBuffers.length = textures.length;
						needsUpdate = true;
					}
				} else {
					if (drawBuffers[0] !== gl.COLOR_ATTACHMENT0) {
						drawBuffers[0] = gl.COLOR_ATTACHMENT0;
						needsUpdate = true;
					}
				}
			} else {
				if (drawBuffers[0] !== gl.BACK) {
					drawBuffers[0] = gl.BACK;
					needsUpdate = true;
				}
			}

			if (needsUpdate) {
				if (capabilities.isWebGL2) {
					gl.drawBuffers(drawBuffers);
				} else {
					extensions.get('WEBGL_draw_buffers').drawBuffersWEBGL(drawBuffers);
				}
			}
		}

		function useProgram(program) {
			if (currentProgram !== program) {
				gl.useProgram(program);
				currentProgram = program;
				return true;
			}

			return false;
		}

		const equationToGL = {
			[AddEquation]: gl.FUNC_ADD,
			[SubtractEquation]: gl.FUNC_SUBTRACT,
			[ReverseSubtractEquation]: gl.FUNC_REVERSE_SUBTRACT
		};

		if (isWebGL2) {
			equationToGL[MinEquation] = gl.MIN;
			equationToGL[MaxEquation] = gl.MAX;
		} else {
			const extension = extensions.get('EXT_blend_minmax');

			if (extension !== null) {
				equationToGL[MinEquation] = extension.MIN_EXT;
				equationToGL[MaxEquation] = extension.MAX_EXT;
			}
		}

		const factorToGL = {
			[ZeroFactor]: gl.ZERO,
			[OneFactor]: gl.ONE,
			[SrcColorFactor]: gl.SRC_COLOR,
			[SrcAlphaFactor]: gl.SRC_ALPHA,
			[SrcAlphaSaturateFactor]: gl.SRC_ALPHA_SATURATE,
			[DstColorFactor]: gl.DST_COLOR,
			[DstAlphaFactor]: gl.DST_ALPHA,
			[OneMinusSrcColorFactor]: gl.ONE_MINUS_SRC_COLOR,
			[OneMinusSrcAlphaFactor]: gl.ONE_MINUS_SRC_ALPHA,
			[OneMinusDstColorFactor]: gl.ONE_MINUS_DST_COLOR,
			[OneMinusDstAlphaFactor]: gl.ONE_MINUS_DST_ALPHA
		};

		function setBlending(blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha, premultipliedAlpha) {
			if (blending === NoBlending) {
				if (currentBlendingEnabled === true) {
					disable(gl.BLEND);
					currentBlendingEnabled = false;
				}

				return;
			}

			if (currentBlendingEnabled === false) {
				enable(gl.BLEND);
				currentBlendingEnabled = true;
			}

			if (blending !== CustomBlending) {
				if (blending !== currentBlending || premultipliedAlpha !== currentPremultipledAlpha) {
					if (currentBlendEquation !== AddEquation || currentBlendEquationAlpha !== AddEquation) {
						gl.blendEquation(gl.FUNC_ADD);
						currentBlendEquation = AddEquation;
						currentBlendEquationAlpha = AddEquation;
					}

					if (premultipliedAlpha) {
						switch (blending) {
							case NormalBlending:
								gl.blendFuncSeparate(gl.ONE, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
								break;

							case AdditiveBlending:
								gl.blendFunc(gl.ONE, gl.ONE);
								break;

							case SubtractiveBlending:
								gl.blendFuncSeparate(gl.ZERO, gl.ONE_MINUS_SRC_COLOR, gl.ZERO, gl.ONE);
								break;

							case MultiplyBlending:
								gl.blendFuncSeparate(gl.ZERO, gl.SRC_COLOR, gl.ZERO, gl.SRC_ALPHA);
								break;

							default:
								console.error('THREE.WebGLState: Invalid blending: ', blending);
								break;
						}
					} else {
						switch (blending) {
							case NormalBlending:
								gl.blendFuncSeparate(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
								break;

							case AdditiveBlending:
								gl.blendFunc(gl.SRC_ALPHA, gl.ONE);
								break;

							case SubtractiveBlending:
								gl.blendFuncSeparate(gl.ZERO, gl.ONE_MINUS_SRC_COLOR, gl.ZERO, gl.ONE);
								break;

							case MultiplyBlending:
								gl.blendFunc(gl.ZERO, gl.SRC_COLOR);
								break;

							default:
								console.error('THREE.WebGLState: Invalid blending: ', blending);
								break;
						}
					}

					currentBlendSrc = null;
					currentBlendDst = null;
					currentBlendSrcAlpha = null;
					currentBlendDstAlpha = null;
					currentBlending = blending;
					currentPremultipledAlpha = premultipliedAlpha;
				}

				return;
			} // custom blending


			blendEquationAlpha = blendEquationAlpha || blendEquation;
			blendSrcAlpha = blendSrcAlpha || blendSrc;
			blendDstAlpha = blendDstAlpha || blendDst;

			if (blendEquation !== currentBlendEquation || blendEquationAlpha !== currentBlendEquationAlpha) {
				gl.blendEquationSeparate(equationToGL[blendEquation], equationToGL[blendEquationAlpha]);
				currentBlendEquation = blendEquation;
				currentBlendEquationAlpha = blendEquationAlpha;
			}

			if (blendSrc !== currentBlendSrc || blendDst !== currentBlendDst || blendSrcAlpha !== currentBlendSrcAlpha || blendDstAlpha !== currentBlendDstAlpha) {
				gl.blendFuncSeparate(factorToGL[blendSrc], factorToGL[blendDst], factorToGL[blendSrcAlpha], factorToGL[blendDstAlpha]);
				currentBlendSrc = blendSrc;
				currentBlendDst = blendDst;
				currentBlendSrcAlpha = blendSrcAlpha;
				currentBlendDstAlpha = blendDstAlpha;
			}

			currentBlending = blending;
			currentPremultipledAlpha = null;
		}

		function setMaterial(material, frontFaceCW) {
			material.side === DoubleSide ? disable(gl.CULL_FACE) : enable(gl.CULL_FACE);
			let flipSided = material.side === BackSide;
			if (frontFaceCW) flipSided = !flipSided;
			setFlipSided(flipSided);
			material.blending === NormalBlending && material.transparent === false ? setBlending(NoBlending) : setBlending(material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.premultipliedAlpha);
			depthBuffer.setFunc(material.depthFunc);
			depthBuffer.setTest(material.depthTest);
			depthBuffer.setMask(material.depthWrite);
			colorBuffer.setMask(material.colorWrite);
			const stencilWrite = material.stencilWrite;
			stencilBuffer.setTest(stencilWrite);

			if (stencilWrite) {
				stencilBuffer.setMask(material.stencilWriteMask);
				stencilBuffer.setFunc(material.stencilFunc, material.stencilRef, material.stencilFuncMask);
				stencilBuffer.setOp(material.stencilFail, material.stencilZFail, material.stencilZPass);
			}

			setPolygonOffset(material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits);
			material.alphaToCoverage === true ? enable(gl.SAMPLE_ALPHA_TO_COVERAGE) : disable(gl.SAMPLE_ALPHA_TO_COVERAGE);
		} //


		function setFlipSided(flipSided) {
			if (currentFlipSided !== flipSided) {
				if (flipSided) {
					gl.frontFace(gl.CW);
				} else {
					gl.frontFace(gl.CCW);
				}

				currentFlipSided = flipSided;
			}
		}

		function setCullFace(cullFace) {
			if (cullFace !== CullFaceNone) {
				enable(gl.CULL_FACE);

				if (cullFace !== currentCullFace) {
					if (cullFace === CullFaceBack) {
						gl.cullFace(gl.BACK);
					} else if (cullFace === CullFaceFront) {
						gl.cullFace(gl.FRONT);
					} else {
						gl.cullFace(gl.FRONT_AND_BACK);
					}
				}
			} else {
				disable(gl.CULL_FACE);
			}

			currentCullFace = cullFace;
		}

		function setLineWidth(width) {
			if (width !== currentLineWidth) {
				if (lineWidthAvailable) gl.lineWidth(width);
				currentLineWidth = width;
			}
		}

		function setPolygonOffset(polygonOffset, factor, units) {
			if (polygonOffset) {
				enable(gl.POLYGON_OFFSET_FILL);

				if (currentPolygonOffsetFactor !== factor || currentPolygonOffsetUnits !== units) {
					gl.polygonOffset(factor, units);
					currentPolygonOffsetFactor = factor;
					currentPolygonOffsetUnits = units;
				}
			} else {
				disable(gl.POLYGON_OFFSET_FILL);
			}
		}

		function setScissorTest(scissorTest) {
			if (scissorTest) {
				enable(gl.SCISSOR_TEST);
			} else {
				disable(gl.SCISSOR_TEST);
			}
		} // texture


		function activeTexture(webglSlot) {
			if (webglSlot === undefined) webglSlot = gl.TEXTURE0 + maxTextures - 1;

			if (currentTextureSlot !== webglSlot) {
				gl.activeTexture(webglSlot);
				currentTextureSlot = webglSlot;
			}
		}

		function bindTexture(webglType, webglTexture) {
			if (currentTextureSlot === null) {
				activeTexture();
			}

			let boundTexture = currentBoundTextures[currentTextureSlot];

			if (boundTexture === undefined) {
				boundTexture = {
					type: undefined,
					texture: undefined
				};
				currentBoundTextures[currentTextureSlot] = boundTexture;
			}

			if (boundTexture.type !== webglType || boundTexture.texture !== webglTexture) {
				gl.bindTexture(webglType, webglTexture || emptyTextures[webglType]);
				boundTexture.type = webglType;
				boundTexture.texture = webglTexture;
			}
		}

		function unbindTexture() {
			const boundTexture = currentBoundTextures[currentTextureSlot];

			if (boundTexture !== undefined && boundTexture.type !== undefined) {
				gl.bindTexture(boundTexture.type, null);
				boundTexture.type = undefined;
				boundTexture.texture = undefined;
			}
		}

		function compressedTexImage2D() {
			try {
				gl.compressedTexImage2D.apply(gl, arguments);
			} catch (error) {
				console.error('THREE.WebGLState:', error);
			}
		}

		function texSubImage2D() {
			try {
				gl.texSubImage2D.apply(gl, arguments);
			} catch (error) {
				console.error('THREE.WebGLState:', error);
			}
		}

		function texSubImage3D() {
			try {
				gl.texSubImage3D.apply(gl, arguments);
			} catch (error) {
				console.error('THREE.WebGLState:', error);
			}
		}

		function compressedTexSubImage2D() {
			try {
				gl.compressedTexSubImage2D.apply(gl, arguments);
			} catch (error) {
				console.error('THREE.WebGLState:', error);
			}
		}

		function texStorage2D() {
			try {
				gl.texStorage2D.apply(gl, arguments);
			} catch (error) {
				console.error('THREE.WebGLState:', error);
			}
		}

		function texStorage3D() {
			try {
				gl.texStorage3D.apply(gl, arguments);
			} catch (error) {
				console.error('THREE.WebGLState:', error);
			}
		}

		function texImage2D() {
			try {
				gl.texImage2D.apply(gl, arguments);
			} catch (error) {
				console.error('THREE.WebGLState:', error);
			}
		}

		function texImage3D() {
			try {
				gl.texImage3D.apply(gl, arguments);
			} catch (error) {
				console.error('THREE.WebGLState:', error);
			}
		} //


		function scissor(scissor) {
			if (currentScissor.equals(scissor) === false) {
				gl.scissor(scissor.x, scissor.y, scissor.z, scissor.w);
				currentScissor.copy(scissor);
			}
		}

		function viewport(viewport) {
			if (currentViewport.equals(viewport) === false) {
				gl.viewport(viewport.x, viewport.y, viewport.z, viewport.w);
				currentViewport.copy(viewport);
			}
		}

		function updateUBOMapping(uniformsGroup, program) {
			let mapping = uboProgamMap.get(program);

			if (mapping === undefined) {
				mapping = new WeakMap();
				uboProgamMap.set(program, mapping);
			}

			let blockIndex = mapping.get(uniformsGroup);

			if (blockIndex === undefined) {
				blockIndex = gl.getUniformBlockIndex(program, uniformsGroup.name);
				mapping.set(uniformsGroup, blockIndex);
			}
		}

		function uniformBlockBinding(uniformsGroup, program) {
			const mapping = uboProgamMap.get(program);
			const blockIndex = mapping.get(uniformsGroup);

			if (uboBindings.get(uniformsGroup) !== blockIndex) {
				// bind shader specific block index to global block point
				gl.uniformBlockBinding(program, blockIndex, uniformsGroup.__bindingPointIndex);
				uboBindings.set(uniformsGroup, blockIndex);
			}
		} //


		function reset() {
			// reset state
			gl.disable(gl.BLEND);
			gl.disable(gl.CULL_FACE);
			gl.disable(gl.DEPTH_TEST);
			gl.disable(gl.POLYGON_OFFSET_FILL);
			gl.disable(gl.SCISSOR_TEST);
			gl.disable(gl.STENCIL_TEST);
			gl.disable(gl.SAMPLE_ALPHA_TO_COVERAGE);
			gl.blendEquation(gl.FUNC_ADD);
			gl.blendFunc(gl.ONE, gl.ZERO);
			gl.blendFuncSeparate(gl.ONE, gl.ZERO, gl.ONE, gl.ZERO);
			gl.colorMask(true, true, true, true);
			gl.clearColor(0, 0, 0, 0);
			gl.depthMask(true);
			gl.depthFunc(gl.LESS);
			gl.clearDepth(1);
			gl.stencilMask(0xffffffff);
			gl.stencilFunc(gl.ALWAYS, 0, 0xffffffff);
			gl.stencilOp(gl.KEEP, gl.KEEP, gl.KEEP);
			gl.clearStencil(0);
			gl.cullFace(gl.BACK);
			gl.frontFace(gl.CCW);
			gl.polygonOffset(0, 0);
			gl.activeTexture(gl.TEXTURE0);
			gl.bindFramebuffer(gl.FRAMEBUFFER, null);

			if (isWebGL2 === true) {
				gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, null);
				gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);
			}

			gl.useProgram(null);
			gl.lineWidth(1);
			gl.scissor(0, 0, gl.canvas.width, gl.canvas.height);
			gl.viewport(0, 0, gl.canvas.width, gl.canvas.height); // reset internals

			enabledCapabilities = {};
			currentTextureSlot = null;
			currentBoundTextures = {};
			currentBoundFramebuffers = {};
			currentDrawbuffers = new WeakMap();
			defaultDrawbuffers = [];
			currentProgram = null;
			currentBlendingEnabled = false;
			currentBlending = null;
			currentBlendEquation = null;
			currentBlendSrc = null;
			currentBlendDst = null;
			currentBlendEquationAlpha = null;
			currentBlendSrcAlpha = null;
			currentBlendDstAlpha = null;
			currentPremultipledAlpha = false;
			currentFlipSided = null;
			currentCullFace = null;
			currentLineWidth = null;
			currentPolygonOffsetFactor = null;
			currentPolygonOffsetUnits = null;
			currentScissor.set(0, 0, gl.canvas.width, gl.canvas.height);
			currentViewport.set(0, 0, gl.canvas.width, gl.canvas.height);
			colorBuffer.reset();
			depthBuffer.reset();
			stencilBuffer.reset();
		}

		return {
			buffers: {
				color: colorBuffer,
				depth: depthBuffer,
				stencil: stencilBuffer
			},
			enable: enable,
			disable: disable,
			bindFramebuffer: bindFramebuffer,
			drawBuffers: drawBuffers,
			useProgram: useProgram,
			setBlending: setBlending,
			setMaterial: setMaterial,
			setFlipSided: setFlipSided,
			setCullFace: setCullFace,
			setLineWidth: setLineWidth,
			setPolygonOffset: setPolygonOffset,
			setScissorTest: setScissorTest,
			activeTexture: activeTexture,
			bindTexture: bindTexture,
			unbindTexture: unbindTexture,
			compressedTexImage2D: compressedTexImage2D,
			texImage2D: texImage2D,
			texImage3D: texImage3D,
			updateUBOMapping: updateUBOMapping,
			uniformBlockBinding: uniformBlockBinding,
			texStorage2D: texStorage2D,
			texStorage3D: texStorage3D,
			texSubImage2D: texSubImage2D,
			texSubImage3D: texSubImage3D,
			compressedTexSubImage2D: compressedTexSubImage2D,
			scissor: scissor,
			viewport: viewport,
			reset: reset
		};
	}

	function WebGLTextures(_gl, extensions, state, properties, capabilities, utils, info) {
		const isWebGL2 = capabilities.isWebGL2;
		const maxTextures = capabilities.maxTextures;
		const maxCubemapSize = capabilities.maxCubemapSize;
		const maxTextureSize = capabilities.maxTextureSize;
		const maxSamples = capabilities.maxSamples;
		const multisampledRTTExt = extensions.has('WEBGL_multisampled_render_to_texture') ? extensions.get('WEBGL_multisampled_render_to_texture') : null;
		const supportsInvalidateFramebuffer = /OculusBrowser/g.test(navigator.userAgent);

		const _videoTextures = new WeakMap();

		let _canvas;

		const _sources = new WeakMap(); // maps WebglTexture objects to instances of Source
		// cordova iOS (as of 5.0) still uses UIWebView, which provides OffscreenCanvas,
		// also OffscreenCanvas.getContext("webgl"), but not OffscreenCanvas.getContext("2d")!
		// Some implementations may only implement OffscreenCanvas partially (e.g. lacking 2d).


		let useOffscreenCanvas = false;

		try {
			useOffscreenCanvas = typeof OffscreenCanvas !== 'undefined' // eslint-disable-next-line compat/compat
			&& new OffscreenCanvas(1, 1).getContext('2d') !== null;
		} catch (err) {// Ignore any errors
		}

		function createCanvas(width, height) {
			// Use OffscreenCanvas when available. Specially needed in web workers
			return useOffscreenCanvas ? // eslint-disable-next-line compat/compat
			new OffscreenCanvas(width, height) : createElementNS('canvas');
		}

		function resizeImage(image, needsPowerOfTwo, needsNewCanvas, maxSize) {
			let scale = 1; // handle case if texture exceeds max size

			if (image.width > maxSize || image.height > maxSize) {
				scale = maxSize / Math.max(image.width, image.height);
			} // only perform resize if necessary


			if (scale < 1 || needsPowerOfTwo === true) {
				// only perform resize for certain image types
				if (typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement || typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap) {
					const floor = needsPowerOfTwo ? floorPowerOfTwo : Math.floor;
					const width = floor(scale * image.width);
					const height = floor(scale * image.height);
					if (_canvas === undefined) _canvas = createCanvas(width, height); // cube textures can't reuse the same canvas

					const canvas = needsNewCanvas ? createCanvas(width, height) : _canvas;
					canvas.width = width;
					canvas.height = height;
					const context = canvas.getContext('2d');
					context.drawImage(image, 0, 0, width, height);
					console.warn('THREE.WebGLRenderer: Texture has been resized from (' + image.width + 'x' + image.height + ') to (' + width + 'x' + height + ').');
					return canvas;
				} else {
					if ('data' in image) {
						console.warn('THREE.WebGLRenderer: Image in DataTexture is too big (' + image.width + 'x' + image.height + ').');
					}

					return image;
				}
			}

			return image;
		}

		function isPowerOfTwo$1(image) {
			return isPowerOfTwo(image.width) && isPowerOfTwo(image.height);
		}

		function textureNeedsPowerOfTwo(texture) {
			if (isWebGL2) return false;
			return texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping || texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;
		}

		function textureNeedsGenerateMipmaps(texture, supportsMips) {
			return texture.generateMipmaps && supportsMips && texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;
		}

		function generateMipmap(target) {
			_gl.generateMipmap(target);
		}

		function getInternalFormat(internalFormatName, glFormat, glType, encoding, isVideoTexture = false) {
			if (isWebGL2 === false) return glFormat;

			if (internalFormatName !== null) {
				if (_gl[internalFormatName] !== undefined) return _gl[internalFormatName];
				console.warn('THREE.WebGLRenderer: Attempt to use non-existing WebGL internal format \'' + internalFormatName + '\'');
			}

			let internalFormat = glFormat;

			if (glFormat === _gl.RED) {
				if (glType === _gl.FLOAT) internalFormat = _gl.R32F;
				if (glType === _gl.HALF_FLOAT) internalFormat = _gl.R16F;
				if (glType === _gl.UNSIGNED_BYTE) internalFormat = _gl.R8;
			}

			if (glFormat === _gl.RG) {
				if (glType === _gl.FLOAT) internalFormat = _gl.RG32F;
				if (glType === _gl.HALF_FLOAT) internalFormat = _gl.RG16F;
				if (glType === _gl.UNSIGNED_BYTE) internalFormat = _gl.RG8;
			}

			if (glFormat === _gl.RGBA) {
				if (glType === _gl.FLOAT) internalFormat = _gl.RGBA32F;
				if (glType === _gl.HALF_FLOAT) internalFormat = _gl.RGBA16F;
				if (glType === _gl.UNSIGNED_BYTE) internalFormat = encoding === sRGBEncoding && isVideoTexture === false ? _gl.SRGB8_ALPHA8 : _gl.RGBA8;
				if (glType === _gl.UNSIGNED_SHORT_4_4_4_4) internalFormat = _gl.RGBA4;
				if (glType === _gl.UNSIGNED_SHORT_5_5_5_1) internalFormat = _gl.RGB5_A1;
			}

			if (internalFormat === _gl.R16F || internalFormat === _gl.R32F || internalFormat === _gl.RG16F || internalFormat === _gl.RG32F || internalFormat === _gl.RGBA16F || internalFormat === _gl.RGBA32F) {
				extensions.get('EXT_color_buffer_float');
			}

			return internalFormat;
		}

		function getMipLevels(texture, image, supportsMips) {
			if (textureNeedsGenerateMipmaps(texture, supportsMips) === true || texture.isFramebufferTexture && texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter) {
				return Math.log2(Math.max(image.width, image.height)) + 1;
			} else if (texture.mipmaps !== undefined && texture.mipmaps.length > 0) {
				// user-defined mipmaps
				return texture.mipmaps.length;
			} else if (texture.isCompressedTexture && Array.isArray(texture.image)) {
				return image.mipmaps.length;
			} else {
				// texture without mipmaps (only base level)
				return 1;
			}
		} // Fallback filters for non-power-of-2 textures


		function filterFallback(f) {
			if (f === NearestFilter || f === NearestMipmapNearestFilter || f === NearestMipmapLinearFilter) {
				return _gl.NEAREST;
			}

			return _gl.LINEAR;
		} //


		function onTextureDispose(event) {
			const texture = event.target;
			texture.removeEventListener('dispose', onTextureDispose);
			deallocateTexture(texture);

			if (texture.isVideoTexture) {
				_videoTextures.delete(texture);
			}
		}

		function onRenderTargetDispose(event) {
			const renderTarget = event.target;
			renderTarget.removeEventListener('dispose', onRenderTargetDispose);
			deallocateRenderTarget(renderTarget);
		} //


		function deallocateTexture(texture) {
			const textureProperties = properties.get(texture);
			if (textureProperties.__webglInit === undefined) return; // check if it's necessary to remove the WebGLTexture object

			const source = texture.source;

			const webglTextures = _sources.get(source);

			if (webglTextures) {
				const webglTexture = webglTextures[textureProperties.__cacheKey];
				webglTexture.usedTimes--; // the WebGLTexture object is not used anymore, remove it

				if (webglTexture.usedTimes === 0) {
					deleteTexture(texture);
				} // remove the weak map entry if no WebGLTexture uses the source anymore


				if (Object.keys(webglTextures).length === 0) {
					_sources.delete(source);
				}
			}

			properties.remove(texture);
		}

		function deleteTexture(texture) {
			const textureProperties = properties.get(texture);

			_gl.deleteTexture(textureProperties.__webglTexture);

			const source = texture.source;

			const webglTextures = _sources.get(source);

			delete webglTextures[textureProperties.__cacheKey];
			info.memory.textures--;
		}

		function deallocateRenderTarget(renderTarget) {
			const texture = renderTarget.texture;
			const renderTargetProperties = properties.get(renderTarget);
			const textureProperties = properties.get(texture);

			if (textureProperties.__webglTexture !== undefined) {
				_gl.deleteTexture(textureProperties.__webglTexture);

				info.memory.textures--;
			}

			if (renderTarget.depthTexture) {
				renderTarget.depthTexture.dispose();
			}

			if (renderTarget.isWebGLCubeRenderTarget) {
				for (let i = 0; i < 6; i++) {
					_gl.deleteFramebuffer(renderTargetProperties.__webglFramebuffer[i]);

					if (renderTargetProperties.__webglDepthbuffer) _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthbuffer[i]);
				}
			} else {
				_gl.deleteFramebuffer(renderTargetProperties.__webglFramebuffer);

				if (renderTargetProperties.__webglDepthbuffer) _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthbuffer);
				if (renderTargetProperties.__webglMultisampledFramebuffer) _gl.deleteFramebuffer(renderTargetProperties.__webglMultisampledFramebuffer);

				if (renderTargetProperties.__webglColorRenderbuffer) {
					for (let i = 0; i < renderTargetProperties.__webglColorRenderbuffer.length; i++) {
						if (renderTargetProperties.__webglColorRenderbuffer[i]) _gl.deleteRenderbuffer(renderTargetProperties.__webglColorRenderbuffer[i]);
					}
				}

				if (renderTargetProperties.__webglDepthRenderbuffer) _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthRenderbuffer);
			}

			if (renderTarget.isWebGLMultipleRenderTargets) {
				for (let i = 0, il = texture.length; i < il; i++) {
					const attachmentProperties = properties.get(texture[i]);

					if (attachmentProperties.__webglTexture) {
						_gl.deleteTexture(attachmentProperties.__webglTexture);

						info.memory.textures--;
					}

					properties.remove(texture[i]);
				}
			}

			properties.remove(texture);
			properties.remove(renderTarget);
		} //


		let textureUnits = 0;

		function resetTextureUnits() {
			textureUnits = 0;
		}

		function allocateTextureUnit() {
			const textureUnit = textureUnits;

			if (textureUnit >= maxTextures) {
				console.warn('THREE.WebGLTextures: Trying to use ' + textureUnit + ' texture units while this GPU supports only ' + maxTextures);
			}

			textureUnits += 1;
			return textureUnit;
		}

		function getTextureCacheKey(texture) {
			const array = [];
			array.push(texture.wrapS);
			array.push(texture.wrapT);
			array.push(texture.magFilter);
			array.push(texture.minFilter);
			array.push(texture.anisotropy);
			array.push(texture.internalFormat);
			array.push(texture.format);
			array.push(texture.type);
			array.push(texture.generateMipmaps);
			array.push(texture.premultiplyAlpha);
			array.push(texture.flipY);
			array.push(texture.unpackAlignment);
			array.push(texture.encoding);
			return array.join();
		} //


		function setTexture2D(texture, slot) {
			const textureProperties = properties.get(texture);
			if (texture.isVideoTexture) updateVideoTexture(texture);

			if (texture.isRenderTargetTexture === false && texture.version > 0 && textureProperties.__version !== texture.version) {
				const image = texture.image;

				if (image === null) {
					console.warn('THREE.WebGLRenderer: Texture marked for update but no image data found.');
				} else if (image.complete === false) {
					console.warn('THREE.WebGLRenderer: Texture marked for update but image is incomplete');
				} else {
					uploadTexture(textureProperties, texture, slot);
					return;
				}
			}

			state.activeTexture(_gl.TEXTURE0 + slot);
			state.bindTexture(_gl.TEXTURE_2D, textureProperties.__webglTexture);
		}

		function setTexture2DArray(texture, slot) {
			const textureProperties = properties.get(texture);

			if (texture.version > 0 && textureProperties.__version !== texture.version) {
				uploadTexture(textureProperties, texture, slot);
				return;
			}

			state.activeTexture(_gl.TEXTURE0 + slot);
			state.bindTexture(_gl.TEXTURE_2D_ARRAY, textureProperties.__webglTexture);
		}

		function setTexture3D(texture, slot) {
			const textureProperties = properties.get(texture);

			if (texture.version > 0 && textureProperties.__version !== texture.version) {
				uploadTexture(textureProperties, texture, slot);
				return;
			}

			state.activeTexture(_gl.TEXTURE0 + slot);
			state.bindTexture(_gl.TEXTURE_3D, textureProperties.__webglTexture);
		}

		function setTextureCube(texture, slot) {
			const textureProperties = properties.get(texture);

			if (texture.version > 0 && textureProperties.__version !== texture.version) {
				uploadCubeTexture(textureProperties, texture, slot);
				return;
			}

			state.activeTexture(_gl.TEXTURE0 + slot);
			state.bindTexture(_gl.TEXTURE_CUBE_MAP, textureProperties.__webglTexture);
		}

		const wrappingToGL = {
			[RepeatWrapping]: _gl.REPEAT,
			[ClampToEdgeWrapping]: _gl.CLAMP_TO_EDGE,
			[MirroredRepeatWrapping]: _gl.MIRRORED_REPEAT
		};
		const filterToGL = {
			[NearestFilter]: _gl.NEAREST,
			[NearestMipmapNearestFilter]: _gl.NEAREST_MIPMAP_NEAREST,
			[NearestMipmapLinearFilter]: _gl.NEAREST_MIPMAP_LINEAR,
			[LinearFilter]: _gl.LINEAR,
			[LinearMipmapNearestFilter]: _gl.LINEAR_MIPMAP_NEAREST,
			[LinearMipmapLinearFilter]: _gl.LINEAR_MIPMAP_LINEAR
		};

		function setTextureParameters(textureType, texture, supportsMips) {
			if (supportsMips) {
				_gl.texParameteri(textureType, _gl.TEXTURE_WRAP_S, wrappingToGL[texture.wrapS]);

				_gl.texParameteri(textureType, _gl.TEXTURE_WRAP_T, wrappingToGL[texture.wrapT]);

				if (textureType === _gl.TEXTURE_3D || textureType === _gl.TEXTURE_2D_ARRAY) {
					_gl.texParameteri(textureType, _gl.TEXTURE_WRAP_R, wrappingToGL[texture.wrapR]);
				}

				_gl.texParameteri(textureType, _gl.TEXTURE_MAG_FILTER, filterToGL[texture.magFilter]);

				_gl.texParameteri(textureType, _gl.TEXTURE_MIN_FILTER, filterToGL[texture.minFilter]);
			} else {
				_gl.texParameteri(textureType, _gl.TEXTURE_WRAP_S, _gl.CLAMP_TO_EDGE);

				_gl.texParameteri(textureType, _gl.TEXTURE_WRAP_T, _gl.CLAMP_TO_EDGE);

				if (textureType === _gl.TEXTURE_3D || textureType === _gl.TEXTURE_2D_ARRAY) {
					_gl.texParameteri(textureType, _gl.TEXTURE_WRAP_R, _gl.CLAMP_TO_EDGE);
				}

				if (texture.wrapS !== ClampToEdgeWrapping || texture.wrapT !== ClampToEdgeWrapping) {
					console.warn('THREE.WebGLRenderer: Texture is not power of two. Texture.wrapS and Texture.wrapT should be set to THREE.ClampToEdgeWrapping.');
				}

				_gl.texParameteri(textureType, _gl.TEXTURE_MAG_FILTER, filterFallback(texture.magFilter));

				_gl.texParameteri(textureType, _gl.TEXTURE_MIN_FILTER, filterFallback(texture.minFilter));

				if (texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter) {
					console.warn('THREE.WebGLRenderer: Texture is not power of two. Texture.minFilter should be set to THREE.NearestFilter or THREE.LinearFilter.');
				}
			}

			if (extensions.has('EXT_texture_filter_anisotropic') === true) {
				const extension = extensions.get('EXT_texture_filter_anisotropic');
				if (texture.type === FloatType && extensions.has('OES_texture_float_linear') === false) return; // verify extension for WebGL 1 and WebGL 2

				if (isWebGL2 === false && texture.type === HalfFloatType && extensions.has('OES_texture_half_float_linear') === false) return; // verify extension for WebGL 1 only

				if (texture.anisotropy > 1 || properties.get(texture).__currentAnisotropy) {
					_gl.texParameterf(textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min(texture.anisotropy, capabilities.getMaxAnisotropy()));

					properties.get(texture).__currentAnisotropy = texture.anisotropy;
				}
			}
		}

		function initTexture(textureProperties, texture) {
			let forceUpload = false;

			if (textureProperties.__webglInit === undefined) {
				textureProperties.__webglInit = true;
				texture.addEventListener('dispose', onTextureDispose);
			} // create Source <-> WebGLTextures mapping if necessary


			const source = texture.source;

			let webglTextures = _sources.get(source);

			if (webglTextures === undefined) {
				webglTextures = {};

				_sources.set(source, webglTextures);
			} // check if there is already a WebGLTexture object for the given texture parameters


			const textureCacheKey = getTextureCacheKey(texture);

			if (textureCacheKey !== textureProperties.__cacheKey) {
				// if not, create a new instance of WebGLTexture
				if (webglTextures[textureCacheKey] === undefined) {
					// create new entry
					webglTextures[textureCacheKey] = {
						texture: _gl.createTexture(),
						usedTimes: 0
					};
					info.memory.textures++; // when a new instance of WebGLTexture was created, a texture upload is required
					// even if the image contents are identical

					forceUpload = true;
				}

				webglTextures[textureCacheKey].usedTimes++; // every time the texture cache key changes, it's necessary to check if an instance of
				// WebGLTexture can be deleted in order to avoid a memory leak.

				const webglTexture = webglTextures[textureProperties.__cacheKey];

				if (webglTexture !== undefined) {
					webglTextures[textureProperties.__cacheKey].usedTimes--;

					if (webglTexture.usedTimes === 0) {
						deleteTexture(texture);
					}
				} // store references to cache key and WebGLTexture object


				textureProperties.__cacheKey = textureCacheKey;
				textureProperties.__webglTexture = webglTextures[textureCacheKey].texture;
			}

			return forceUpload;
		}

		function uploadTexture(textureProperties, texture, slot) {
			let textureType = _gl.TEXTURE_2D;
			if (texture.isDataArrayTexture) textureType = _gl.TEXTURE_2D_ARRAY;
			if (texture.isData3DTexture) textureType = _gl.TEXTURE_3D;
			const forceUpload = initTexture(textureProperties, texture);
			const source = texture.source;
			state.activeTexture(_gl.TEXTURE0 + slot);
			state.bindTexture(textureType, textureProperties.__webglTexture);

			if (source.version !== source.__currentVersion || forceUpload === true) {
				_gl.pixelStorei(_gl.UNPACK_FLIP_Y_WEBGL, texture.flipY);

				_gl.pixelStorei(_gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha);

				_gl.pixelStorei(_gl.UNPACK_ALIGNMENT, texture.unpackAlignment);

				_gl.pixelStorei(_gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, _gl.NONE);

				const needsPowerOfTwo = textureNeedsPowerOfTwo(texture) && isPowerOfTwo$1(texture.image) === false;
				let image = resizeImage(texture.image, needsPowerOfTwo, false, maxTextureSize);
				image = verifyColorSpace(texture, image);
				const supportsMips = isPowerOfTwo$1(image) || isWebGL2,
							glFormat = utils.convert(texture.format, texture.encoding);
				let glType = utils.convert(texture.type),
						glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.encoding, texture.isVideoTexture);
				setTextureParameters(textureType, texture, supportsMips);
				let mipmap;
				const mipmaps = texture.mipmaps;
				const useTexStorage = isWebGL2 && texture.isVideoTexture !== true;
				const allocateMemory = source.__currentVersion === undefined || forceUpload === true;
				const levels = getMipLevels(texture, image, supportsMips);

				if (texture.isDepthTexture) {
					// populate depth texture with dummy data
					glInternalFormat = _gl.DEPTH_COMPONENT;

					if (isWebGL2) {
						if (texture.type === FloatType) {
							glInternalFormat = _gl.DEPTH_COMPONENT32F;
						} else if (texture.type === UnsignedIntType) {
							glInternalFormat = _gl.DEPTH_COMPONENT24;
						} else if (texture.type === UnsignedInt248Type) {
							glInternalFormat = _gl.DEPTH24_STENCIL8;
						} else {
							glInternalFormat = _gl.DEPTH_COMPONENT16; // WebGL2 requires sized internalformat for glTexImage2D
						}
					} else {
						if (texture.type === FloatType) {
							console.error('WebGLRenderer: Floating point depth texture requires WebGL2.');
						}
					} // validation checks for WebGL 1


					if (texture.format === DepthFormat && glInternalFormat === _gl.DEPTH_COMPONENT) {
						// The error INVALID_OPERATION is generated by texImage2D if format and internalformat are
						// DEPTH_COMPONENT and type is not UNSIGNED_SHORT or UNSIGNED_INT
						// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
						if (texture.type !== UnsignedShortType && texture.type !== UnsignedIntType) {
							console.warn('THREE.WebGLRenderer: Use UnsignedShortType or UnsignedIntType for DepthFormat DepthTexture.');
							texture.type = UnsignedIntType;
							glType = utils.convert(texture.type);
						}
					}

					if (texture.format === DepthStencilFormat && glInternalFormat === _gl.DEPTH_COMPONENT) {
						// Depth stencil textures need the DEPTH_STENCIL internal format
						// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)
						glInternalFormat = _gl.DEPTH_STENCIL; // The error INVALID_OPERATION is generated by texImage2D if format and internalformat are
						// DEPTH_STENCIL and type is not UNSIGNED_INT_24_8_WEBGL.
						// (https://www.khronos.org/registry/webgl/extensions/WEBGL_depth_texture/)

						if (texture.type !== UnsignedInt248Type) {
							console.warn('THREE.WebGLRenderer: Use UnsignedInt248Type for DepthStencilFormat DepthTexture.');
							texture.type = UnsignedInt248Type;
							glType = utils.convert(texture.type);
						}
					} //


					if (allocateMemory) {
						if (useTexStorage) {
							state.texStorage2D(_gl.TEXTURE_2D, 1, glInternalFormat, image.width, image.height);
						} else {
							state.texImage2D(_gl.TEXTURE_2D, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, null);
						}
					}
				} else if (texture.isDataTexture) {
					// use manually created mipmaps if available
					// if there are no manual mipmaps
					// set 0 level mipmap and then use GL to generate other mipmap levels
					if (mipmaps.length > 0 && supportsMips) {
						if (useTexStorage && allocateMemory) {
							state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, mipmaps[0].width, mipmaps[0].height);
						}

						for (let i = 0, il = mipmaps.length; i < il; i++) {
							mipmap = mipmaps[i];

							if (useTexStorage) {
								state.texSubImage2D(_gl.TEXTURE_2D, i, 0, 0, mipmap.width, mipmap.height, glFormat, glType, mipmap.data);
							} else {
								state.texImage2D(_gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
							}
						}

						texture.generateMipmaps = false;
					} else {
						if (useTexStorage) {
							if (allocateMemory) {
								state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, image.width, image.height);
							}

							state.texSubImage2D(_gl.TEXTURE_2D, 0, 0, 0, image.width, image.height, glFormat, glType, image.data);
						} else {
							state.texImage2D(_gl.TEXTURE_2D, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, image.data);
						}
					}
				} else if (texture.isCompressedTexture) {
					if (useTexStorage && allocateMemory) {
						state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, mipmaps[0].width, mipmaps[0].height);
					}

					for (let i = 0, il = mipmaps.length; i < il; i++) {
						mipmap = mipmaps[i];

						if (texture.format !== RGBAFormat) {
							if (glFormat !== null) {
								if (useTexStorage) {
									state.compressedTexSubImage2D(_gl.TEXTURE_2D, i, 0, 0, mipmap.width, mipmap.height, glFormat, mipmap.data);
								} else {
									state.compressedTexImage2D(_gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data);
								}
							} else {
								console.warn('THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()');
							}
						} else {
							if (useTexStorage) {
								state.texSubImage2D(_gl.TEXTURE_2D, i, 0, 0, mipmap.width, mipmap.height, glFormat, glType, mipmap.data);
							} else {
								state.texImage2D(_gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
							}
						}
					}
				} else if (texture.isDataArrayTexture) {
					if (useTexStorage) {
						if (allocateMemory) {
							state.texStorage3D(_gl.TEXTURE_2D_ARRAY, levels, glInternalFormat, image.width, image.height, image.depth);
						}

						state.texSubImage3D(_gl.TEXTURE_2D_ARRAY, 0, 0, 0, 0, image.width, image.height, image.depth, glFormat, glType, image.data);
					} else {
						state.texImage3D(_gl.TEXTURE_2D_ARRAY, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data);
					}
				} else if (texture.isData3DTexture) {
					if (useTexStorage) {
						if (allocateMemory) {
							state.texStorage3D(_gl.TEXTURE_3D, levels, glInternalFormat, image.width, image.height, image.depth);
						}

						state.texSubImage3D(_gl.TEXTURE_3D, 0, 0, 0, 0, image.width, image.height, image.depth, glFormat, glType, image.data);
					} else {
						state.texImage3D(_gl.TEXTURE_3D, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data);
					}
				} else if (texture.isFramebufferTexture) {
					if (allocateMemory) {
						if (useTexStorage) {
							state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, image.width, image.height);
						} else {
							let width = image.width,
									height = image.height;

							for (let i = 0; i < levels; i++) {
								state.texImage2D(_gl.TEXTURE_2D, i, glInternalFormat, width, height, 0, glFormat, glType, null);
								width >>= 1;
								height >>= 1;
							}
						}
					}
				} else {
					// regular Texture (image, video, canvas)
					// use manually created mipmaps if available
					// if there are no manual mipmaps
					// set 0 level mipmap and then use GL to generate other mipmap levels
					if (mipmaps.length > 0 && supportsMips) {
						if (useTexStorage && allocateMemory) {
							state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, mipmaps[0].width, mipmaps[0].height);
						}

						for (let i = 0, il = mipmaps.length; i < il; i++) {
							mipmap = mipmaps[i];

							if (useTexStorage) {
								state.texSubImage2D(_gl.TEXTURE_2D, i, 0, 0, glFormat, glType, mipmap);
							} else {
								state.texImage2D(_gl.TEXTURE_2D, i, glInternalFormat, glFormat, glType, mipmap);
							}
						}

						texture.generateMipmaps = false;
					} else {
						if (useTexStorage) {
							if (allocateMemory) {
								state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, image.width, image.height);
							}

							state.texSubImage2D(_gl.TEXTURE_2D, 0, 0, 0, glFormat, glType, image);
						} else {
							state.texImage2D(_gl.TEXTURE_2D, 0, glInternalFormat, glFormat, glType, image);
						}
					}
				}

				if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
					generateMipmap(textureType);
				}

				source.__currentVersion = source.version;
				if (texture.onUpdate) texture.onUpdate(texture);
			}

			textureProperties.__version = texture.version;
		}

		function uploadCubeTexture(textureProperties, texture, slot) {
			if (texture.image.length !== 6) return;
			const forceUpload = initTexture(textureProperties, texture);
			const source = texture.source;
			state.activeTexture(_gl.TEXTURE0 + slot);
			state.bindTexture(_gl.TEXTURE_CUBE_MAP, textureProperties.__webglTexture);

			if (source.version !== source.__currentVersion || forceUpload === true) {
				_gl.pixelStorei(_gl.UNPACK_FLIP_Y_WEBGL, texture.flipY);

				_gl.pixelStorei(_gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha);

				_gl.pixelStorei(_gl.UNPACK_ALIGNMENT, texture.unpackAlignment);

				_gl.pixelStorei(_gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, _gl.NONE);

				const isCompressed = texture.isCompressedTexture || texture.image[0].isCompressedTexture;
				const isDataTexture = texture.image[0] && texture.image[0].isDataTexture;
				const cubeImage = [];

				for (let i = 0; i < 6; i++) {
					if (!isCompressed && !isDataTexture) {
						cubeImage[i] = resizeImage(texture.image[i], false, true, maxCubemapSize);
					} else {
						cubeImage[i] = isDataTexture ? texture.image[i].image : texture.image[i];
					}

					cubeImage[i] = verifyColorSpace(texture, cubeImage[i]);
				}

				const image = cubeImage[0],
							supportsMips = isPowerOfTwo$1(image) || isWebGL2,
							glFormat = utils.convert(texture.format, texture.encoding),
							glType = utils.convert(texture.type),
							glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.encoding);
				const useTexStorage = isWebGL2 && texture.isVideoTexture !== true;
				const allocateMemory = source.__currentVersion === undefined || forceUpload === true;
				let levels = getMipLevels(texture, image, supportsMips);
				setTextureParameters(_gl.TEXTURE_CUBE_MAP, texture, supportsMips);
				let mipmaps;

				if (isCompressed) {
					if (useTexStorage && allocateMemory) {
						state.texStorage2D(_gl.TEXTURE_CUBE_MAP, levels, glInternalFormat, image.width, image.height);
					}

					for (let i = 0; i < 6; i++) {
						mipmaps = cubeImage[i].mipmaps;

						for (let j = 0; j < mipmaps.length; j++) {
							const mipmap = mipmaps[j];

							if (texture.format !== RGBAFormat) {
								if (glFormat !== null) {
									if (useTexStorage) {
										state.compressedTexSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, 0, 0, mipmap.width, mipmap.height, glFormat, mipmap.data);
									} else {
										state.compressedTexImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data);
									}
								} else {
									console.warn('THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .setTextureCube()');
								}
							} else {
								if (useTexStorage) {
									state.texSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, 0, 0, mipmap.width, mipmap.height, glFormat, glType, mipmap.data);
								} else {
									state.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
								}
							}
						}
					}
				} else {
					mipmaps = texture.mipmaps;

					if (useTexStorage && allocateMemory) {
						// TODO: Uniformly handle mipmap definitions
						// Normal textures and compressed cube textures define base level + mips with their mipmap array
						// Uncompressed cube textures use their mipmap array only for mips (no base level)
						if (mipmaps.length > 0) levels++;
						state.texStorage2D(_gl.TEXTURE_CUBE_MAP, levels, glInternalFormat, cubeImage[0].width, cubeImage[0].height);
					}

					for (let i = 0; i < 6; i++) {
						if (isDataTexture) {
							if (useTexStorage) {
								state.texSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, 0, 0, cubeImage[i].width, cubeImage[i].height, glFormat, glType, cubeImage[i].data);
							} else {
								state.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glInternalFormat, cubeImage[i].width, cubeImage[i].height, 0, glFormat, glType, cubeImage[i].data);
							}

							for (let j = 0; j < mipmaps.length; j++) {
								const mipmap = mipmaps[j];
								const mipmapImage = mipmap.image[i].image;

								if (useTexStorage) {
									state.texSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j + 1, 0, 0, mipmapImage.width, mipmapImage.height, glFormat, glType, mipmapImage.data);
								} else {
									state.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j + 1, glInternalFormat, mipmapImage.width, mipmapImage.height, 0, glFormat, glType, mipmapImage.data);
								}
							}
						} else {
							if (useTexStorage) {
								state.texSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, 0, 0, glFormat, glType, cubeImage[i]);
							} else {
								state.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glInternalFormat, glFormat, glType, cubeImage[i]);
							}

							for (let j = 0; j < mipmaps.length; j++) {
								const mipmap = mipmaps[j];

								if (useTexStorage) {
									state.texSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j + 1, 0, 0, glFormat, glType, mipmap.image[i]);
								} else {
									state.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j + 1, glInternalFormat, glFormat, glType, mipmap.image[i]);
								}
							}
						}
					}
				}

				if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
					// We assume images for cube map have the same size.
					generateMipmap(_gl.TEXTURE_CUBE_MAP);
				}

				source.__currentVersion = source.version;
				if (texture.onUpdate) texture.onUpdate(texture);
			}

			textureProperties.__version = texture.version;
		} // Render targets
		// Setup storage for target texture and bind it to correct framebuffer


		function setupFrameBufferTexture(framebuffer, renderTarget, texture, attachment, textureTarget) {
			const glFormat = utils.convert(texture.format, texture.encoding);
			const glType = utils.convert(texture.type);
			const glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.encoding);
			const renderTargetProperties = properties.get(renderTarget);

			if (!renderTargetProperties.__hasExternalTextures) {
				if (textureTarget === _gl.TEXTURE_3D || textureTarget === _gl.TEXTURE_2D_ARRAY) {
					state.texImage3D(textureTarget, 0, glInternalFormat, renderTarget.width, renderTarget.height, renderTarget.depth, 0, glFormat, glType, null);
				} else {
					state.texImage2D(textureTarget, 0, glInternalFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null);
				}
			}

			state.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);

			if (useMultisampledRTT(renderTarget)) {
				multisampledRTTExt.framebufferTexture2DMultisampleEXT(_gl.FRAMEBUFFER, attachment, textureTarget, properties.get(texture).__webglTexture, 0, getRenderTargetSamples(renderTarget));
			} else {
				_gl.framebufferTexture2D(_gl.FRAMEBUFFER, attachment, textureTarget, properties.get(texture).__webglTexture, 0);
			}

			state.bindFramebuffer(_gl.FRAMEBUFFER, null);
		} // Setup storage for internal depth/stencil buffers and bind to correct framebuffer


		function setupRenderBufferStorage(renderbuffer, renderTarget, isMultisample) {
			_gl.bindRenderbuffer(_gl.RENDERBUFFER, renderbuffer);

			if (renderTarget.depthBuffer && !renderTarget.stencilBuffer) {
				let glInternalFormat = _gl.DEPTH_COMPONENT16;

				if (isMultisample || useMultisampledRTT(renderTarget)) {
					const depthTexture = renderTarget.depthTexture;

					if (depthTexture && depthTexture.isDepthTexture) {
						if (depthTexture.type === FloatType) {
							glInternalFormat = _gl.DEPTH_COMPONENT32F;
						} else if (depthTexture.type === UnsignedIntType) {
							glInternalFormat = _gl.DEPTH_COMPONENT24;
						}
					}

					const samples = getRenderTargetSamples(renderTarget);

					if (useMultisampledRTT(renderTarget)) {
						multisampledRTTExt.renderbufferStorageMultisampleEXT(_gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height);
					} else {
						_gl.renderbufferStorageMultisample(_gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height);
					}
				} else {
					_gl.renderbufferStorage(_gl.RENDERBUFFER, glInternalFormat, renderTarget.width, renderTarget.height);
				}

				_gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer);
			} else if (renderTarget.depthBuffer && renderTarget.stencilBuffer) {
				const samples = getRenderTargetSamples(renderTarget);

				if (isMultisample && useMultisampledRTT(renderTarget) === false) {
					_gl.renderbufferStorageMultisample(_gl.RENDERBUFFER, samples, _gl.DEPTH24_STENCIL8, renderTarget.width, renderTarget.height);
				} else if (useMultisampledRTT(renderTarget)) {
					multisampledRTTExt.renderbufferStorageMultisampleEXT(_gl.RENDERBUFFER, samples, _gl.DEPTH24_STENCIL8, renderTarget.width, renderTarget.height);
				} else {
					_gl.renderbufferStorage(_gl.RENDERBUFFER, _gl.DEPTH_STENCIL, renderTarget.width, renderTarget.height);
				}

				_gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer);
			} else {
				const textures = renderTarget.isWebGLMultipleRenderTargets === true ? renderTarget.texture : [renderTarget.texture];

				for (let i = 0; i < textures.length; i++) {
					const texture = textures[i];
					const glFormat = utils.convert(texture.format, texture.encoding);
					const glType = utils.convert(texture.type);
					const glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.encoding);
					const samples = getRenderTargetSamples(renderTarget);

					if (isMultisample && useMultisampledRTT(renderTarget) === false) {
						_gl.renderbufferStorageMultisample(_gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height);
					} else if (useMultisampledRTT(renderTarget)) {
						multisampledRTTExt.renderbufferStorageMultisampleEXT(_gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height);
					} else {
						_gl.renderbufferStorage(_gl.RENDERBUFFER, glInternalFormat, renderTarget.width, renderTarget.height);
					}
				}
			}

			_gl.bindRenderbuffer(_gl.RENDERBUFFER, null);
		} // Setup resources for a Depth Texture for a FBO (needs an extension)


		function setupDepthTexture(framebuffer, renderTarget) {
			const isCube = renderTarget && renderTarget.isWebGLCubeRenderTarget;
			if (isCube) throw new Error('Depth Texture with cube render targets is not supported');
			state.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);

			if (!(renderTarget.depthTexture && renderTarget.depthTexture.isDepthTexture)) {
				throw new Error('renderTarget.depthTexture must be an instance of THREE.DepthTexture');
			} // upload an empty depth texture with framebuffer size


			if (!properties.get(renderTarget.depthTexture).__webglTexture || renderTarget.depthTexture.image.width !== renderTarget.width || renderTarget.depthTexture.image.height !== renderTarget.height) {
				renderTarget.depthTexture.image.width = renderTarget.width;
				renderTarget.depthTexture.image.height = renderTarget.height;
				renderTarget.depthTexture.needsUpdate = true;
			}

			setTexture2D(renderTarget.depthTexture, 0);

			const webglDepthTexture = properties.get(renderTarget.depthTexture).__webglTexture;

			const samples = getRenderTargetSamples(renderTarget);

			if (renderTarget.depthTexture.format === DepthFormat) {
				if (useMultisampledRTT(renderTarget)) {
					multisampledRTTExt.framebufferTexture2DMultisampleEXT(_gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0, samples);
				} else {
					_gl.framebufferTexture2D(_gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0);
				}
			} else if (renderTarget.depthTexture.format === DepthStencilFormat) {
				if (useMultisampledRTT(renderTarget)) {
					multisampledRTTExt.framebufferTexture2DMultisampleEXT(_gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0, samples);
				} else {
					_gl.framebufferTexture2D(_gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0);
				}
			} else {
				throw new Error('Unknown depthTexture format');
			}
		} // Setup GL resources for a non-texture depth buffer


		function setupDepthRenderbuffer(renderTarget) {
			const renderTargetProperties = properties.get(renderTarget);
			const isCube = renderTarget.isWebGLCubeRenderTarget === true;

			if (renderTarget.depthTexture && !renderTargetProperties.__autoAllocateDepthBuffer) {
				if (isCube) throw new Error('target.depthTexture not supported in Cube render targets');
				setupDepthTexture(renderTargetProperties.__webglFramebuffer, renderTarget);
			} else {
				if (isCube) {
					renderTargetProperties.__webglDepthbuffer = [];

					for (let i = 0; i < 6; i++) {
						state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer[i]);
						renderTargetProperties.__webglDepthbuffer[i] = _gl.createRenderbuffer();
						setupRenderBufferStorage(renderTargetProperties.__webglDepthbuffer[i], renderTarget, false);
					}
				} else {
					state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer);
					renderTargetProperties.__webglDepthbuffer = _gl.createRenderbuffer();
					setupRenderBufferStorage(renderTargetProperties.__webglDepthbuffer, renderTarget, false);
				}
			}

			state.bindFramebuffer(_gl.FRAMEBUFFER, null);
		} // rebind framebuffer with external textures


		function rebindTextures(renderTarget, colorTexture, depthTexture) {
			const renderTargetProperties = properties.get(renderTarget);

			if (colorTexture !== undefined) {
				setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer, renderTarget, renderTarget.texture, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_2D);
			}

			if (depthTexture !== undefined) {
				setupDepthRenderbuffer(renderTarget);
			}
		} // Set up GL resources for the render target


		function setupRenderTarget(renderTarget) {
			const texture = renderTarget.texture;
			const renderTargetProperties = properties.get(renderTarget);
			const textureProperties = properties.get(texture);
			renderTarget.addEventListener('dispose', onRenderTargetDispose);

			if (renderTarget.isWebGLMultipleRenderTargets !== true) {
				if (textureProperties.__webglTexture === undefined) {
					textureProperties.__webglTexture = _gl.createTexture();
				}

				textureProperties.__version = texture.version;
				info.memory.textures++;
			}

			const isCube = renderTarget.isWebGLCubeRenderTarget === true;
			const isMultipleRenderTargets = renderTarget.isWebGLMultipleRenderTargets === true;
			const supportsMips = isPowerOfTwo$1(renderTarget) || isWebGL2; // Setup framebuffer

			if (isCube) {
				renderTargetProperties.__webglFramebuffer = [];

				for (let i = 0; i < 6; i++) {
					renderTargetProperties.__webglFramebuffer[i] = _gl.createFramebuffer();
				}
			} else {
				renderTargetProperties.__webglFramebuffer = _gl.createFramebuffer();

				if (isMultipleRenderTargets) {
					if (capabilities.drawBuffers) {
						const textures = renderTarget.texture;

						for (let i = 0, il = textures.length; i < il; i++) {
							const attachmentProperties = properties.get(textures[i]);

							if (attachmentProperties.__webglTexture === undefined) {
								attachmentProperties.__webglTexture = _gl.createTexture();
								info.memory.textures++;
							}
						}
					} else {
						console.warn('THREE.WebGLRenderer: WebGLMultipleRenderTargets can only be used with WebGL2 or WEBGL_draw_buffers extension.');
					}
				}

				if (isWebGL2 && renderTarget.samples > 0 && useMultisampledRTT(renderTarget) === false) {
					const textures = isMultipleRenderTargets ? texture : [texture];
					renderTargetProperties.__webglMultisampledFramebuffer = _gl.createFramebuffer();
					renderTargetProperties.__webglColorRenderbuffer = [];
					state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglMultisampledFramebuffer);

					for (let i = 0; i < textures.length; i++) {
						const texture = textures[i];
						renderTargetProperties.__webglColorRenderbuffer[i] = _gl.createRenderbuffer();

						_gl.bindRenderbuffer(_gl.RENDERBUFFER, renderTargetProperties.__webglColorRenderbuffer[i]);

						const glFormat = utils.convert(texture.format, texture.encoding);
						const glType = utils.convert(texture.type);
						const glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.encoding);
						const samples = getRenderTargetSamples(renderTarget);

						_gl.renderbufferStorageMultisample(_gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height);

						_gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.RENDERBUFFER, renderTargetProperties.__webglColorRenderbuffer[i]);
					}

					_gl.bindRenderbuffer(_gl.RENDERBUFFER, null);

					if (renderTarget.depthBuffer) {
						renderTargetProperties.__webglDepthRenderbuffer = _gl.createRenderbuffer();
						setupRenderBufferStorage(renderTargetProperties.__webglDepthRenderbuffer, renderTarget, true);
					}

					state.bindFramebuffer(_gl.FRAMEBUFFER, null);
				}
			} // Setup color buffer


			if (isCube) {
				state.bindTexture(_gl.TEXTURE_CUBE_MAP, textureProperties.__webglTexture);
				setTextureParameters(_gl.TEXTURE_CUBE_MAP, texture, supportsMips);

				for (let i = 0; i < 6; i++) {
					setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer[i], renderTarget, texture, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i);
				}

				if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
					generateMipmap(_gl.TEXTURE_CUBE_MAP);
				}

				state.unbindTexture();
			} else if (isMultipleRenderTargets) {
				const textures = renderTarget.texture;

				for (let i = 0, il = textures.length; i < il; i++) {
					const attachment = textures[i];
					const attachmentProperties = properties.get(attachment);
					state.bindTexture(_gl.TEXTURE_2D, attachmentProperties.__webglTexture);
					setTextureParameters(_gl.TEXTURE_2D, attachment, supportsMips);
					setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer, renderTarget, attachment, _gl.COLOR_ATTACHMENT0 + i, _gl.TEXTURE_2D);

					if (textureNeedsGenerateMipmaps(attachment, supportsMips)) {
						generateMipmap(_gl.TEXTURE_2D);
					}
				}

				state.unbindTexture();
			} else {
				let glTextureType = _gl.TEXTURE_2D;

				if (renderTarget.isWebGL3DRenderTarget || renderTarget.isWebGLArrayRenderTarget) {
					if (isWebGL2) {
						glTextureType = renderTarget.isWebGL3DRenderTarget ? _gl.TEXTURE_3D : _gl.TEXTURE_2D_ARRAY;
					} else {
						console.error('THREE.WebGLTextures: THREE.Data3DTexture and THREE.DataArrayTexture only supported with WebGL2.');
					}
				}

				state.bindTexture(glTextureType, textureProperties.__webglTexture);
				setTextureParameters(glTextureType, texture, supportsMips);
				setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer, renderTarget, texture, _gl.COLOR_ATTACHMENT0, glTextureType);

				if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
					generateMipmap(glTextureType);
				}

				state.unbindTexture();
			} // Setup depth and stencil buffers


			if (renderTarget.depthBuffer) {
				setupDepthRenderbuffer(renderTarget);
			}
		}

		function updateRenderTargetMipmap(renderTarget) {
			const supportsMips = isPowerOfTwo$1(renderTarget) || isWebGL2;
			const textures = renderTarget.isWebGLMultipleRenderTargets === true ? renderTarget.texture : [renderTarget.texture];

			for (let i = 0, il = textures.length; i < il; i++) {
				const texture = textures[i];

				if (textureNeedsGenerateMipmaps(texture, supportsMips)) {
					const target = renderTarget.isWebGLCubeRenderTarget ? _gl.TEXTURE_CUBE_MAP : _gl.TEXTURE_2D;

					const webglTexture = properties.get(texture).__webglTexture;

					state.bindTexture(target, webglTexture);
					generateMipmap(target);
					state.unbindTexture();
				}
			}
		}

		function updateMultisampleRenderTarget(renderTarget) {
			if (isWebGL2 && renderTarget.samples > 0 && useMultisampledRTT(renderTarget) === false) {
				const textures = renderTarget.isWebGLMultipleRenderTargets ? renderTarget.texture : [renderTarget.texture];
				const width = renderTarget.width;
				const height = renderTarget.height;
				let mask = _gl.COLOR_BUFFER_BIT;
				const invalidationArray = [];
				const depthStyle = renderTarget.stencilBuffer ? _gl.DEPTH_STENCIL_ATTACHMENT : _gl.DEPTH_ATTACHMENT;
				const renderTargetProperties = properties.get(renderTarget);
				const isMultipleRenderTargets = renderTarget.isWebGLMultipleRenderTargets === true; // If MRT we need to remove FBO attachments

				if (isMultipleRenderTargets) {
					for (let i = 0; i < textures.length; i++) {
						state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglMultisampledFramebuffer);

						_gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.RENDERBUFFER, null);

						state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer);

						_gl.framebufferTexture2D(_gl.DRAW_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.TEXTURE_2D, null, 0);
					}
				}

				state.bindFramebuffer(_gl.READ_FRAMEBUFFER, renderTargetProperties.__webglMultisampledFramebuffer);
				state.bindFramebuffer(_gl.DRAW_FRAMEBUFFER, renderTargetProperties.__webglFramebuffer);

				for (let i = 0; i < textures.length; i++) {
					invalidationArray.push(_gl.COLOR_ATTACHMENT0 + i);

					if (renderTarget.depthBuffer) {
						invalidationArray.push(depthStyle);
					}

					const ignoreDepthValues = renderTargetProperties.__ignoreDepthValues !== undefined ? renderTargetProperties.__ignoreDepthValues : false;

					if (ignoreDepthValues === false) {
						if (renderTarget.depthBuffer) mask |= _gl.DEPTH_BUFFER_BIT;
						if (renderTarget.stencilBuffer) mask |= _gl.STENCIL_BUFFER_BIT;
					}

					if (isMultipleRenderTargets) {
						_gl.framebufferRenderbuffer(_gl.READ_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, _gl.RENDERBUFFER, renderTargetProperties.__webglColorRenderbuffer[i]);
					}

					if (ignoreDepthValues === true) {
						_gl.invalidateFramebuffer(_gl.READ_FRAMEBUFFER, [depthStyle]);

						_gl.invalidateFramebuffer(_gl.DRAW_FRAMEBUFFER, [depthStyle]);
					}

					if (isMultipleRenderTargets) {
						const webglTexture = properties.get(textures[i]).__webglTexture;

						_gl.framebufferTexture2D(_gl.DRAW_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_2D, webglTexture, 0);
					}

					_gl.blitFramebuffer(0, 0, width, height, 0, 0, width, height, mask, _gl.NEAREST);

					if (supportsInvalidateFramebuffer) {
						_gl.invalidateFramebuffer(_gl.READ_FRAMEBUFFER, invalidationArray);
					}
				}

				state.bindFramebuffer(_gl.READ_FRAMEBUFFER, null);
				state.bindFramebuffer(_gl.DRAW_FRAMEBUFFER, null); // If MRT since pre-blit we removed the FBO we need to reconstruct the attachments

				if (isMultipleRenderTargets) {
					for (let i = 0; i < textures.length; i++) {
						state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglMultisampledFramebuffer);

						_gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.RENDERBUFFER, renderTargetProperties.__webglColorRenderbuffer[i]);

						const webglTexture = properties.get(textures[i]).__webglTexture;

						state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer);

						_gl.framebufferTexture2D(_gl.DRAW_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.TEXTURE_2D, webglTexture, 0);
					}
				}

				state.bindFramebuffer(_gl.DRAW_FRAMEBUFFER, renderTargetProperties.__webglMultisampledFramebuffer);
			}
		}

		function getRenderTargetSamples(renderTarget) {
			return Math.min(maxSamples, renderTarget.samples);
		}

		function useMultisampledRTT(renderTarget) {
			const renderTargetProperties = properties.get(renderTarget);
			return isWebGL2 && renderTarget.samples > 0 && extensions.has('WEBGL_multisampled_render_to_texture') === true && renderTargetProperties.__useRenderToTexture !== false;
		}

		function updateVideoTexture(texture) {
			const frame = info.render.frame; // Check the last frame we updated the VideoTexture

			if (_videoTextures.get(texture) !== frame) {
				_videoTextures.set(texture, frame);

				texture.update();
			}
		}

		function verifyColorSpace(texture, image) {
			const encoding = texture.encoding;
			const format = texture.format;
			const type = texture.type;
			if (texture.isCompressedTexture === true || texture.isVideoTexture === true || texture.format === _SRGBAFormat) return image;

			if (encoding !== LinearEncoding) {
				// sRGB
				if (encoding === sRGBEncoding) {
					if (isWebGL2 === false) {
						// in WebGL 1, try to use EXT_sRGB extension and unsized formats
						if (extensions.has('EXT_sRGB') === true && format === RGBAFormat) {
							texture.format = _SRGBAFormat; // it's not possible to generate mips in WebGL 1 with this extension

							texture.minFilter = LinearFilter;
							texture.generateMipmaps = false;
						} else {
							// slow fallback (CPU decode)
							image = ImageUtils.sRGBToLinear(image);
						}
					} else {
						// in WebGL 2 uncompressed textures can only be sRGB encoded if they have the RGBA8 format
						if (format !== RGBAFormat || type !== UnsignedByteType) {
							console.warn('THREE.WebGLTextures: sRGB encoded textures have to use RGBAFormat and UnsignedByteType.');
						}
					}
				} else {
					console.error('THREE.WebGLTextures: Unsupported texture encoding:', encoding);
				}
			}

			return image;
		} //


		this.allocateTextureUnit = allocateTextureUnit;
		this.resetTextureUnits = resetTextureUnits;
		this.setTexture2D = setTexture2D;
		this.setTexture2DArray = setTexture2DArray;
		this.setTexture3D = setTexture3D;
		this.setTextureCube = setTextureCube;
		this.rebindTextures = rebindTextures;
		this.setupRenderTarget = setupRenderTarget;
		this.updateRenderTargetMipmap = updateRenderTargetMipmap;
		this.updateMultisampleRenderTarget = updateMultisampleRenderTarget;
		this.setupDepthRenderbuffer = setupDepthRenderbuffer;
		this.setupFrameBufferTexture = setupFrameBufferTexture;
		this.useMultisampledRTT = useMultisampledRTT;
	}

	function WebGLUtils(gl, extensions, capabilities) {
		const isWebGL2 = capabilities.isWebGL2;

		function convert(p, encoding = null) {
			let extension;
			if (p === UnsignedByteType) return gl.UNSIGNED_BYTE;
			if (p === UnsignedShort4444Type) return gl.UNSIGNED_SHORT_4_4_4_4;
			if (p === UnsignedShort5551Type) return gl.UNSIGNED_SHORT_5_5_5_1;
			if (p === ByteType) return gl.BYTE;
			if (p === ShortType) return gl.SHORT;
			if (p === UnsignedShortType) return gl.UNSIGNED_SHORT;
			if (p === IntType) return gl.INT;
			if (p === UnsignedIntType) return gl.UNSIGNED_INT;
			if (p === FloatType) return gl.FLOAT;

			if (p === HalfFloatType) {
				if (isWebGL2) return gl.HALF_FLOAT;
				extension = extensions.get('OES_texture_half_float');

				if (extension !== null) {
					return extension.HALF_FLOAT_OES;
				} else {
					return null;
				}
			}

			if (p === AlphaFormat) return gl.ALPHA;
			if (p === RGBAFormat) return gl.RGBA;
			if (p === LuminanceFormat) return gl.LUMINANCE;
			if (p === LuminanceAlphaFormat) return gl.LUMINANCE_ALPHA;
			if (p === DepthFormat) return gl.DEPTH_COMPONENT;
			if (p === DepthStencilFormat) return gl.DEPTH_STENCIL;
			if (p === RedFormat) return gl.RED;

			if (p === RGBFormat) {
				console.warn('THREE.WebGLRenderer: THREE.RGBFormat has been removed. Use THREE.RGBAFormat instead. https://github.com/mrdoob/three.js/pull/23228');
				return gl.RGBA;
			} // WebGL 1 sRGB fallback


			if (p === _SRGBAFormat) {
				extension = extensions.get('EXT_sRGB');

				if (extension !== null) {
					return extension.SRGB_ALPHA_EXT;
				} else {
					return null;
				}
			} // WebGL2 formats.


			if (p === RedIntegerFormat) return gl.RED_INTEGER;
			if (p === RGFormat) return gl.RG;
			if (p === RGIntegerFormat) return gl.RG_INTEGER;
			if (p === RGBAIntegerFormat) return gl.RGBA_INTEGER; // S3TC

			if (p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format || p === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format) {
				if (encoding === sRGBEncoding) {
					extension = extensions.get('WEBGL_compressed_texture_s3tc_srgb');

					if (extension !== null) {
						if (p === RGB_S3TC_DXT1_Format) return extension.COMPRESSED_SRGB_S3TC_DXT1_EXT;
						if (p === RGBA_S3TC_DXT1_Format) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT;
						if (p === RGBA_S3TC_DXT3_Format) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT;
						if (p === RGBA_S3TC_DXT5_Format) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT;
					} else {
						return null;
					}
				} else {
					extension = extensions.get('WEBGL_compressed_texture_s3tc');

					if (extension !== null) {
						if (p === RGB_S3TC_DXT1_Format) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;
						if (p === RGBA_S3TC_DXT1_Format) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;
						if (p === RGBA_S3TC_DXT3_Format) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;
						if (p === RGBA_S3TC_DXT5_Format) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;
					} else {
						return null;
					}
				}
			} // PVRTC


			if (p === RGB_PVRTC_4BPPV1_Format || p === RGB_PVRTC_2BPPV1_Format || p === RGBA_PVRTC_4BPPV1_Format || p === RGBA_PVRTC_2BPPV1_Format) {
				extension = extensions.get('WEBGL_compressed_texture_pvrtc');

				if (extension !== null) {
					if (p === RGB_PVRTC_4BPPV1_Format) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
					if (p === RGB_PVRTC_2BPPV1_Format) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
					if (p === RGBA_PVRTC_4BPPV1_Format) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
					if (p === RGBA_PVRTC_2BPPV1_Format) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;
				} else {
					return null;
				}
			} // ETC1


			if (p === RGB_ETC1_Format) {
				extension = extensions.get('WEBGL_compressed_texture_etc1');

				if (extension !== null) {
					return extension.COMPRESSED_RGB_ETC1_WEBGL;
				} else {
					return null;
				}
			} // ETC2


			if (p === RGB_ETC2_Format || p === RGBA_ETC2_EAC_Format) {
				extension = extensions.get('WEBGL_compressed_texture_etc');

				if (extension !== null) {
					if (p === RGB_ETC2_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ETC2 : extension.COMPRESSED_RGB8_ETC2;
					if (p === RGBA_ETC2_EAC_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ETC2_EAC : extension.COMPRESSED_RGBA8_ETC2_EAC;
				} else {
					return null;
				}
			} // ASTC


			if (p === RGBA_ASTC_4x4_Format || p === RGBA_ASTC_5x4_Format || p === RGBA_ASTC_5x5_Format || p === RGBA_ASTC_6x5_Format || p === RGBA_ASTC_6x6_Format || p === RGBA_ASTC_8x5_Format || p === RGBA_ASTC_8x6_Format || p === RGBA_ASTC_8x8_Format || p === RGBA_ASTC_10x5_Format || p === RGBA_ASTC_10x6_Format || p === RGBA_ASTC_10x8_Format || p === RGBA_ASTC_10x10_Format || p === RGBA_ASTC_12x10_Format || p === RGBA_ASTC_12x12_Format) {
				extension = extensions.get('WEBGL_compressed_texture_astc');

				if (extension !== null) {
					if (p === RGBA_ASTC_4x4_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR : extension.COMPRESSED_RGBA_ASTC_4x4_KHR;
					if (p === RGBA_ASTC_5x4_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR : extension.COMPRESSED_RGBA_ASTC_5x4_KHR;
					if (p === RGBA_ASTC_5x5_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR : extension.COMPRESSED_RGBA_ASTC_5x5_KHR;
					if (p === RGBA_ASTC_6x5_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR : extension.COMPRESSED_RGBA_ASTC_6x5_KHR;
					if (p === RGBA_ASTC_6x6_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR : extension.COMPRESSED_RGBA_ASTC_6x6_KHR;
					if (p === RGBA_ASTC_8x5_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR : extension.COMPRESSED_RGBA_ASTC_8x5_KHR;
					if (p === RGBA_ASTC_8x6_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR : extension.COMPRESSED_RGBA_ASTC_8x6_KHR;
					if (p === RGBA_ASTC_8x8_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR : extension.COMPRESSED_RGBA_ASTC_8x8_KHR;
					if (p === RGBA_ASTC_10x5_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR : extension.COMPRESSED_RGBA_ASTC_10x5_KHR;
					if (p === RGBA_ASTC_10x6_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR : extension.COMPRESSED_RGBA_ASTC_10x6_KHR;
					if (p === RGBA_ASTC_10x8_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR : extension.COMPRESSED_RGBA_ASTC_10x8_KHR;
					if (p === RGBA_ASTC_10x10_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR : extension.COMPRESSED_RGBA_ASTC_10x10_KHR;
					if (p === RGBA_ASTC_12x10_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR : extension.COMPRESSED_RGBA_ASTC_12x10_KHR;
					if (p === RGBA_ASTC_12x12_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR : extension.COMPRESSED_RGBA_ASTC_12x12_KHR;
				} else {
					return null;
				}
			} // BPTC


			if (p === RGBA_BPTC_Format) {
				extension = extensions.get('EXT_texture_compression_bptc');

				if (extension !== null) {
					if (p === RGBA_BPTC_Format) return encoding === sRGBEncoding ? extension.COMPRESSED_SRGB_ALPHA_BPTC_UNORM_EXT : extension.COMPRESSED_RGBA_BPTC_UNORM_EXT;
				} else {
					return null;
				}
			} //


			if (p === UnsignedInt248Type) {
				if (isWebGL2) return gl.UNSIGNED_INT_24_8;
				extension = extensions.get('WEBGL_depth_texture');

				if (extension !== null) {
					return extension.UNSIGNED_INT_24_8_WEBGL;
				} else {
					return null;
				}
			} // if "p" can't be resolved, assume the user defines a WebGL constant as a string (fallback/workaround for packed RGB formats)


			return gl[p] !== undefined ? gl[p] : null;
		}

		return {
			convert: convert
		};
	}

	class ArrayCamera extends PerspectiveCamera {
		constructor(array = []) {
			super();
			this.isArrayCamera = true;
			this.cameras = array;
		}

	}

	class Group extends Object3D {
		constructor() {
			super();
			this.isGroup = true;
			this.type = 'Group';
		}

	}

	const _moveEvent = {
		type: 'move'
	};

	class WebXRController {
		constructor() {
			this._targetRay = null;
			this._grip = null;
			this._hand = null;
		}

		getHandSpace() {
			if (this._hand === null) {
				this._hand = new Group();
				this._hand.matrixAutoUpdate = false;
				this._hand.visible = false;
				this._hand.joints = {};
				this._hand.inputState = {
					pinching: false
				};
			}

			return this._hand;
		}

		getTargetRaySpace() {
			if (this._targetRay === null) {
				this._targetRay = new Group();
				this._targetRay.matrixAutoUpdate = false;
				this._targetRay.visible = false;
				this._targetRay.hasLinearVelocity = false;
				this._targetRay.linearVelocity = new Vector3();
				this._targetRay.hasAngularVelocity = false;
				this._targetRay.angularVelocity = new Vector3();
			}

			return this._targetRay;
		}

		getGripSpace() {
			if (this._grip === null) {
				this._grip = new Group();
				this._grip.matrixAutoUpdate = false;
				this._grip.visible = false;
				this._grip.hasLinearVelocity = false;
				this._grip.linearVelocity = new Vector3();
				this._grip.hasAngularVelocity = false;
				this._grip.angularVelocity = new Vector3();
			}

			return this._grip;
		}

		dispatchEvent(event) {
			if (this._targetRay !== null) {
				this._targetRay.dispatchEvent(event);
			}

			if (this._grip !== null) {
				this._grip.dispatchEvent(event);
			}

			if (this._hand !== null) {
				this._hand.dispatchEvent(event);
			}

			return this;
		}

		disconnect(inputSource) {
			this.dispatchEvent({
				type: 'disconnected',
				data: inputSource
			});

			if (this._targetRay !== null) {
				this._targetRay.visible = false;
			}

			if (this._grip !== null) {
				this._grip.visible = false;
			}

			if (this._hand !== null) {
				this._hand.visible = false;
			}

			return this;
		}

		update(inputSource, frame, referenceSpace) {
			let inputPose = null;
			let gripPose = null;
			let handPose = null;
			const targetRay = this._targetRay;
			const grip = this._grip;
			const hand = this._hand;

			if (inputSource && frame.session.visibilityState !== 'visible-blurred') {
				if (hand && inputSource.hand) {
					handPose = true;

					for (const inputjoint of inputSource.hand.values()) {
						// Update the joints groups with the XRJoint poses
						const jointPose = frame.getJointPose(inputjoint, referenceSpace);

						if (hand.joints[inputjoint.jointName] === undefined) {
							// The transform of this joint will be updated with the joint pose on each frame
							const joint = new Group();
							joint.matrixAutoUpdate = false;
							joint.visible = false;
							hand.joints[inputjoint.jointName] = joint; // ??

							hand.add(joint);
						}

						const joint = hand.joints[inputjoint.jointName];

						if (jointPose !== null) {
							joint.matrix.fromArray(jointPose.transform.matrix);
							joint.matrix.decompose(joint.position, joint.rotation, joint.scale);
							joint.jointRadius = jointPose.radius;
						}

						joint.visible = jointPose !== null;
					} // Custom events
					// Check pinchz


					const indexTip = hand.joints['index-finger-tip'];
					const thumbTip = hand.joints['thumb-tip'];
					const distance = indexTip.position.distanceTo(thumbTip.position);
					const distanceToPinch = 0.02;
					const threshold = 0.005;

					if (hand.inputState.pinching && distance > distanceToPinch + threshold) {
						hand.inputState.pinching = false;
						this.dispatchEvent({
							type: 'pinchend',
							handedness: inputSource.handedness,
							target: this
						});
					} else if (!hand.inputState.pinching && distance <= distanceToPinch - threshold) {
						hand.inputState.pinching = true;
						this.dispatchEvent({
							type: 'pinchstart',
							handedness: inputSource.handedness,
							target: this
						});
					}
				} else {
					if (grip !== null && inputSource.gripSpace) {
						gripPose = frame.getPose(inputSource.gripSpace, referenceSpace);

						if (gripPose !== null) {
							grip.matrix.fromArray(gripPose.transform.matrix);
							grip.matrix.decompose(grip.position, grip.rotation, grip.scale);

							if (gripPose.linearVelocity) {
								grip.hasLinearVelocity = true;
								grip.linearVelocity.copy(gripPose.linearVelocity);
							} else {
								grip.hasLinearVelocity = false;
							}

							if (gripPose.angularVelocity) {
								grip.hasAngularVelocity = true;
								grip.angularVelocity.copy(gripPose.angularVelocity);
							} else {
								grip.hasAngularVelocity = false;
							}
						}
					}
				}

				if (targetRay !== null) {
					inputPose = frame.getPose(inputSource.targetRaySpace, referenceSpace); // Some runtimes (namely Vive Cosmos with Vive OpenXR Runtime) have only grip space and ray space is equal to it

					if (inputPose === null && gripPose !== null) {
						inputPose = gripPose;
					}

					if (inputPose !== null) {
						targetRay.matrix.fromArray(inputPose.transform.matrix);
						targetRay.matrix.decompose(targetRay.position, targetRay.rotation, targetRay.scale);

						if (inputPose.linearVelocity) {
							targetRay.hasLinearVelocity = true;
							targetRay.linearVelocity.copy(inputPose.linearVelocity);
						} else {
							targetRay.hasLinearVelocity = false;
						}

						if (inputPose.angularVelocity) {
							targetRay.hasAngularVelocity = true;
							targetRay.angularVelocity.copy(inputPose.angularVelocity);
						} else {
							targetRay.hasAngularVelocity = false;
						}

						this.dispatchEvent(_moveEvent);
					}
				}
			}

			if (targetRay !== null) {
				targetRay.visible = inputPose !== null;
			}

			if (grip !== null) {
				grip.visible = gripPose !== null;
			}

			if (hand !== null) {
				hand.visible = handPose !== null;
			}

			return this;
		}

	}

	class DepthTexture extends Texture {
		constructor(width, height, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, format) {
			format = format !== undefined ? format : DepthFormat;

			if (format !== DepthFormat && format !== DepthStencilFormat) {
				throw new Error('DepthTexture format must be either THREE.DepthFormat or THREE.DepthStencilFormat');
			}

			if (type === undefined && format === DepthFormat) type = UnsignedIntType;
			if (type === undefined && format === DepthStencilFormat) type = UnsignedInt248Type;
			super(null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);
			this.isDepthTexture = true;
			this.image = {
				width: width,
				height: height
			};
			this.magFilter = magFilter !== undefined ? magFilter : NearestFilter;
			this.minFilter = minFilter !== undefined ? minFilter : NearestFilter;
			this.flipY = false;
			this.generateMipmaps = false;
		}

	}

	class WebXRManager extends EventDispatcher {
		constructor(renderer, gl) {
			super();
			const scope = this;
			let session = null;
			let framebufferScaleFactor = 1.0;
			let referenceSpace = null;
			let referenceSpaceType = 'local-floor';
			let customReferenceSpace = null;
			let pose = null;
			let glBinding = null;
			let glProjLayer = null;
			let glBaseLayer = null;
			let xrFrame = null;
			const attributes = gl.getContextAttributes();
			let initialRenderTarget = null;
			let newRenderTarget = null;
			const controllers = [];
			const controllerInputSources = []; //

			const cameraL = new PerspectiveCamera();
			cameraL.layers.enable(1);
			cameraL.viewport = new Vector4();
			const cameraR = new PerspectiveCamera();
			cameraR.layers.enable(2);
			cameraR.viewport = new Vector4();
			const cameras = [cameraL, cameraR];
			const cameraVR = new ArrayCamera();
			cameraVR.layers.enable(1);
			cameraVR.layers.enable(2);
			let _currentDepthNear = null;
			let _currentDepthFar = null; //

			this.cameraAutoUpdate = true;
			this.enabled = false;
			this.isPresenting = false;

			this.getController = function (index) {
				let controller = controllers[index];

				if (controller === undefined) {
					controller = new WebXRController();
					controllers[index] = controller;
				}

				return controller.getTargetRaySpace();
			};

			this.getControllerGrip = function (index) {
				let controller = controllers[index];

				if (controller === undefined) {
					controller = new WebXRController();
					controllers[index] = controller;
				}

				return controller.getGripSpace();
			};

			this.getHand = function (index) {
				let controller = controllers[index];

				if (controller === undefined) {
					controller = new WebXRController();
					controllers[index] = controller;
				}

				return controller.getHandSpace();
			}; //


			function onSessionEvent(event) {
				const controllerIndex = controllerInputSources.indexOf(event.inputSource);

				if (controllerIndex === -1) {
					return;
				}

				const controller = controllers[controllerIndex];

				if (controller !== undefined) {
					controller.dispatchEvent({
						type: event.type,
						data: event.inputSource
					});
				}
			}

			function onSessionEnd() {
				session.removeEventListener('select', onSessionEvent);
				session.removeEventListener('selectstart', onSessionEvent);
				session.removeEventListener('selectend', onSessionEvent);
				session.removeEventListener('squeeze', onSessionEvent);
				session.removeEventListener('squeezestart', onSessionEvent);
				session.removeEventListener('squeezeend', onSessionEvent);
				session.removeEventListener('end', onSessionEnd);
				session.removeEventListener('inputsourceschange', onInputSourcesChange);

				for (let i = 0; i < controllers.length; i++) {
					const inputSource = controllerInputSources[i];
					if (inputSource === null) continue;
					controllerInputSources[i] = null;
					controllers[i].disconnect(inputSource);
				}

				_currentDepthNear = null;
				_currentDepthFar = null; // restore framebuffer/rendering state

				renderer.setRenderTarget(initialRenderTarget);
				glBaseLayer = null;
				glProjLayer = null;
				glBinding = null;
				session = null;
				newRenderTarget = null; //

				animation.stop();
				scope.isPresenting = false;
				scope.dispatchEvent({
					type: 'sessionend'
				});
			}

			this.setFramebufferScaleFactor = function (value) {
				framebufferScaleFactor = value;

				if (scope.isPresenting === true) {
					console.warn('THREE.WebXRManager: Cannot change framebuffer scale while presenting.');
				}
			};

			this.setReferenceSpaceType = function (value) {
				referenceSpaceType = value;

				if (scope.isPresenting === true) {
					console.warn('THREE.WebXRManager: Cannot change reference space type while presenting.');
				}
			};

			this.getReferenceSpace = function () {
				return customReferenceSpace || referenceSpace;
			};

			this.setReferenceSpace = function (space) {
				customReferenceSpace = space;
			};

			this.getBaseLayer = function () {
				return glProjLayer !== null ? glProjLayer : glBaseLayer;
			};

			this.getBinding = function () {
				return glBinding;
			};

			this.getFrame = function () {
				return xrFrame;
			};

			this.getSession = function () {
				return session;
			};

			this.setSession = async function (value) {
				session = value;

				if (session !== null) {
					initialRenderTarget = renderer.getRenderTarget();
					session.addEventListener('select', onSessionEvent);
					session.addEventListener('selectstart', onSessionEvent);
					session.addEventListener('selectend', onSessionEvent);
					session.addEventListener('squeeze', onSessionEvent);
					session.addEventListener('squeezestart', onSessionEvent);
					session.addEventListener('squeezeend', onSessionEvent);
					session.addEventListener('end', onSessionEnd);
					session.addEventListener('inputsourceschange', onInputSourcesChange);

					if (attributes.xrCompatible !== true) {
						await gl.makeXRCompatible();
					}

					if (session.renderState.layers === undefined || renderer.capabilities.isWebGL2 === false) {
						const layerInit = {
							antialias: session.renderState.layers === undefined ? attributes.antialias : true,
							alpha: attributes.alpha,
							depth: attributes.depth,
							stencil: attributes.stencil,
							framebufferScaleFactor: framebufferScaleFactor
						};
						glBaseLayer = new XRWebGLLayer(session, gl, layerInit);
						session.updateRenderState({
							baseLayer: glBaseLayer
						});
						newRenderTarget = new WebGLRenderTarget(glBaseLayer.framebufferWidth, glBaseLayer.framebufferHeight, {
							format: RGBAFormat,
							type: UnsignedByteType,
							encoding: renderer.outputEncoding
						});
					} else {
						let depthFormat = null;
						let depthType = null;
						let glDepthFormat = null;

						if (attributes.depth) {
							glDepthFormat = attributes.stencil ? gl.DEPTH24_STENCIL8 : gl.DEPTH_COMPONENT24;
							depthFormat = attributes.stencil ? DepthStencilFormat : DepthFormat;
							depthType = attributes.stencil ? UnsignedInt248Type : UnsignedIntType;
						}

						const projectionlayerInit = {
							colorFormat: gl.RGBA8,
							depthFormat: glDepthFormat,
							scaleFactor: framebufferScaleFactor
						};
						glBinding = new XRWebGLBinding(session, gl);
						glProjLayer = glBinding.createProjectionLayer(projectionlayerInit);
						session.updateRenderState({
							layers: [glProjLayer]
						});
						newRenderTarget = new WebGLRenderTarget(glProjLayer.textureWidth, glProjLayer.textureHeight, {
							format: RGBAFormat,
							type: UnsignedByteType,
							depthTexture: new DepthTexture(glProjLayer.textureWidth, glProjLayer.textureHeight, depthType, undefined, undefined, undefined, undefined, undefined, undefined, depthFormat),
							stencilBuffer: attributes.stencil,
							encoding: renderer.outputEncoding,
							samples: attributes.antialias ? 4 : 0
						});
						const renderTargetProperties = renderer.properties.get(newRenderTarget);
						renderTargetProperties.__ignoreDepthValues = glProjLayer.ignoreDepthValues;
					}

					newRenderTarget.isXRRenderTarget = true; // TODO Remove this when possible, see #23278
					// Set foveation to maximum.

					this.setFoveation(1.0);
					customReferenceSpace = null;
					referenceSpace = await session.requestReferenceSpace(referenceSpaceType);
					animation.setContext(session);
					animation.start();
					scope.isPresenting = true;
					scope.dispatchEvent({
						type: 'sessionstart'
					});
				}
			};

			function onInputSourcesChange(event) {
				// Notify disconnected
				for (let i = 0; i < event.removed.length; i++) {
					const inputSource = event.removed[i];
					const index = controllerInputSources.indexOf(inputSource);

					if (index >= 0) {
						controllerInputSources[index] = null;
						controllers[index].dispatchEvent({
							type: 'disconnected',
							data: inputSource
						});
					}
				} // Notify connected


				for (let i = 0; i < event.added.length; i++) {
					const inputSource = event.added[i];
					let controllerIndex = controllerInputSources.indexOf(inputSource);

					if (controllerIndex === -1) {
						// Assign input source a controller that currently has no input source
						for (let i = 0; i < controllers.length; i++) {
							if (i >= controllerInputSources.length) {
								controllerInputSources.push(inputSource);
								controllerIndex = i;
								break;
							} else if (controllerInputSources[i] === null) {
								controllerInputSources[i] = inputSource;
								controllerIndex = i;
								break;
							}
						} // If all controllers do currently receive input we ignore new ones


						if (controllerIndex === -1) break;
					}

					const controller = controllers[controllerIndex];

					if (controller) {
						controller.dispatchEvent({
							type: 'connected',
							data: inputSource
						});
					}
				}
			} //


			const cameraLPos = new Vector3();
			const cameraRPos = new Vector3();
			/**
			 * Assumes 2 cameras that are parallel and share an X-axis, and that
			 * the cameras' projection and world matrices have already been set.
			 * And that near and far planes are identical for both cameras.
			 * Visualization of this technique: https://computergraphics.stackexchange.com/a/4765
			 */

			function setProjectionFromUnion(camera, cameraL, cameraR) {
				cameraLPos.setFromMatrixPosition(cameraL.matrixWorld);
				cameraRPos.setFromMatrixPosition(cameraR.matrixWorld);
				const ipd = cameraLPos.distanceTo(cameraRPos);
				const projL = cameraL.projectionMatrix.elements;
				const projR = cameraR.projectionMatrix.elements; // VR systems will have identical far and near planes, and
				// most likely identical top and bottom frustum extents.
				// Use the left camera for these values.

				const near = projL[14] / (projL[10] - 1);
				const far = projL[14] / (projL[10] + 1);
				const topFov = (projL[9] + 1) / projL[5];
				const bottomFov = (projL[9] - 1) / projL[5];
				const leftFov = (projL[8] - 1) / projL[0];
				const rightFov = (projR[8] + 1) / projR[0];
				const left = near * leftFov;
				const right = near * rightFov; // Calculate the new camera's position offset from the
				// left camera. xOffset should be roughly half `ipd`.

				const zOffset = ipd / (-leftFov + rightFov);
				const xOffset = zOffset * -leftFov; // TODO: Better way to apply this offset?

				cameraL.matrixWorld.decompose(camera.position, camera.quaternion, camera.scale);
				camera.translateX(xOffset);
				camera.translateZ(zOffset);
				camera.matrixWorld.compose(camera.position, camera.quaternion, camera.scale);
				camera.matrixWorldInverse.copy(camera.matrixWorld).invert(); // Find the union of the frustum values of the cameras and scale
				// the values so that the near plane's position does not change in world space,
				// although must now be relative to the new union camera.

				const near2 = near + zOffset;
				const far2 = far + zOffset;
				const left2 = left - xOffset;
				const right2 = right + (ipd - xOffset);
				const top2 = topFov * far / far2 * near2;
				const bottom2 = bottomFov * far / far2 * near2;
				camera.projectionMatrix.makePerspective(left2, right2, top2, bottom2, near2, far2);
			}

			function updateCamera(camera, parent) {
				if (parent === null) {
					camera.matrixWorld.copy(camera.matrix);
				} else {
					camera.matrixWorld.multiplyMatrices(parent.matrixWorld, camera.matrix);
				}

				camera.matrixWorldInverse.copy(camera.matrixWorld).invert();
			}

			this.updateCamera = function (camera) {
				if (session === null) return;
				cameraVR.near = cameraR.near = cameraL.near = camera.near;
				cameraVR.far = cameraR.far = cameraL.far = camera.far;

				if (_currentDepthNear !== cameraVR.near || _currentDepthFar !== cameraVR.far) {
					// Note that the new renderState won't apply until the next frame. See #18320
					session.updateRenderState({
						depthNear: cameraVR.near,
						depthFar: cameraVR.far
					});
					_currentDepthNear = cameraVR.near;
					_currentDepthFar = cameraVR.far;
				}

				const parent = camera.parent;
				const cameras = cameraVR.cameras;
				updateCamera(cameraVR, parent);

				for (let i = 0; i < cameras.length; i++) {
					updateCamera(cameras[i], parent);
				}

				cameraVR.matrixWorld.decompose(cameraVR.position, cameraVR.quaternion, cameraVR.scale); // update user camera and its children

				camera.position.copy(cameraVR.position);
				camera.quaternion.copy(cameraVR.quaternion);
				camera.scale.copy(cameraVR.scale);
				camera.matrix.copy(cameraVR.matrix);
				camera.matrixWorld.copy(cameraVR.matrixWorld);
				const children = camera.children;

				for (let i = 0, l = children.length; i < l; i++) {
					children[i].updateMatrixWorld(true);
				} // update projection matrix for proper view frustum culling


				if (cameras.length === 2) {
					setProjectionFromUnion(cameraVR, cameraL, cameraR);
				} else {
					// assume single camera setup (AR)
					cameraVR.projectionMatrix.copy(cameraL.projectionMatrix);
				}
			};

			this.getCamera = function () {
				return cameraVR;
			};

			this.getFoveation = function () {
				if (glProjLayer !== null) {
					return glProjLayer.fixedFoveation;
				}

				if (glBaseLayer !== null) {
					return glBaseLayer.fixedFoveation;
				}

				return undefined;
			};

			this.setFoveation = function (foveation) {
				// 0 = no foveation = full resolution
				// 1 = maximum foveation = the edges render at lower resolution
				if (glProjLayer !== null) {
					glProjLayer.fixedFoveation = foveation;
				}

				if (glBaseLayer !== null && glBaseLayer.fixedFoveation !== undefined) {
					glBaseLayer.fixedFoveation = foveation;
				}
			}; // Animation Loop


			let onAnimationFrameCallback = null;

			function onAnimationFrame(time, frame) {
				pose = frame.getViewerPose(customReferenceSpace || referenceSpace);
				xrFrame = frame;

				if (pose !== null) {
					const views = pose.views;

					if (glBaseLayer !== null) {
						renderer.setRenderTargetFramebuffer(newRenderTarget, glBaseLayer.framebuffer);
						renderer.setRenderTarget(newRenderTarget);
					}

					let cameraVRNeedsUpdate = false; // check if it's necessary to rebuild cameraVR's camera list

					if (views.length !== cameraVR.cameras.length) {
						cameraVR.cameras.length = 0;
						cameraVRNeedsUpdate = true;
					}

					for (let i = 0; i < views.length; i++) {
						const view = views[i];
						let viewport = null;

						if (glBaseLayer !== null) {
							viewport = glBaseLayer.getViewport(view);
						} else {
							const glSubImage = glBinding.getViewSubImage(glProjLayer, view);
							viewport = glSubImage.viewport; // For side-by-side projection, we only produce a single texture for both eyes.

							if (i === 0) {
								renderer.setRenderTargetTextures(newRenderTarget, glSubImage.colorTexture, glProjLayer.ignoreDepthValues ? undefined : glSubImage.depthStencilTexture);
								renderer.setRenderTarget(newRenderTarget);
							}
						}

						let camera = cameras[i];

						if (camera === undefined) {
							camera = new PerspectiveCamera();
							camera.layers.enable(i);
							camera.viewport = new Vector4();
							cameras[i] = camera;
						}

						camera.matrix.fromArray(view.transform.matrix);
						camera.projectionMatrix.fromArray(view.projectionMatrix);
						camera.viewport.set(viewport.x, viewport.y, viewport.width, viewport.height);

						if (i === 0) {
							cameraVR.matrix.copy(camera.matrix);
						}

						if (cameraVRNeedsUpdate === true) {
							cameraVR.cameras.push(camera);
						}
					}
				} //


				for (let i = 0; i < controllers.length; i++) {
					const inputSource = controllerInputSources[i];
					const controller = controllers[i];

					if (inputSource !== null && controller !== undefined) {
						controller.update(inputSource, frame, customReferenceSpace || referenceSpace);
					}
				}

				if (onAnimationFrameCallback) onAnimationFrameCallback(time, frame);
				xrFrame = null;
			}

			const animation = new WebGLAnimation();
			animation.setAnimationLoop(onAnimationFrame);

			this.setAnimationLoop = function (callback) {
				onAnimationFrameCallback = callback;
			};

			this.dispose = function () {};
		}

	}

	function WebGLMaterials(renderer, properties) {
		function refreshFogUniforms(uniforms, fog) {
			uniforms.fogColor.value.copy(fog.color);

			if (fog.isFog) {
				uniforms.fogNear.value = fog.near;
				uniforms.fogFar.value = fog.far;
			} else if (fog.isFogExp2) {
				uniforms.fogDensity.value = fog.density;
			}
		}

		function refreshMaterialUniforms(uniforms, material, pixelRatio, height, transmissionRenderTarget) {
			if (material.isMeshBasicMaterial) {
				refreshUniformsCommon(uniforms, material);
			} else if (material.isMeshLambertMaterial) {
				refreshUniformsCommon(uniforms, material);
			} else if (material.isMeshToonMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsToon(uniforms, material);
			} else if (material.isMeshPhongMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsPhong(uniforms, material);
			} else if (material.isMeshStandardMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsStandard(uniforms, material);

				if (material.isMeshPhysicalMaterial) {
					refreshUniformsPhysical(uniforms, material, transmissionRenderTarget);
				}
			} else if (material.isMeshMatcapMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsMatcap(uniforms, material);
			} else if (material.isMeshDepthMaterial) {
				refreshUniformsCommon(uniforms, material);
			} else if (material.isMeshDistanceMaterial) {
				refreshUniformsCommon(uniforms, material);
				refreshUniformsDistance(uniforms, material);
			} else if (material.isMeshNormalMaterial) {
				refreshUniformsCommon(uniforms, material);
			} else if (material.isLineBasicMaterial) {
				refreshUniformsLine(uniforms, material);

				if (material.isLineDashedMaterial) {
					refreshUniformsDash(uniforms, material);
				}
			} else if (material.isPointsMaterial) {
				refreshUniformsPoints(uniforms, material, pixelRatio, height);
			} else if (material.isSpriteMaterial) {
				refreshUniformsSprites(uniforms, material);
			} else if (material.isShadowMaterial) {
				uniforms.color.value.copy(material.color);
				uniforms.opacity.value = material.opacity;
			} else if (material.isShaderMaterial) {
				material.uniformsNeedUpdate = false; // #15581
			}
		}

		function refreshUniformsCommon(uniforms, material) {
			uniforms.opacity.value = material.opacity;

			if (material.color) {
				uniforms.diffuse.value.copy(material.color);
			}

			if (material.emissive) {
				uniforms.emissive.value.copy(material.emissive).multiplyScalar(material.emissiveIntensity);
			}

			if (material.map) {
				uniforms.map.value = material.map;
			}

			if (material.alphaMap) {
				uniforms.alphaMap.value = material.alphaMap;
			}

			if (material.bumpMap) {
				uniforms.bumpMap.value = material.bumpMap;
				uniforms.bumpScale.value = material.bumpScale;
				if (material.side === BackSide) uniforms.bumpScale.value *= -1;
			}

			if (material.displacementMap) {
				uniforms.displacementMap.value = material.displacementMap;
				uniforms.displacementScale.value = material.displacementScale;
				uniforms.displacementBias.value = material.displacementBias;
			}

			if (material.emissiveMap) {
				uniforms.emissiveMap.value = material.emissiveMap;
			}

			if (material.normalMap) {
				uniforms.normalMap.value = material.normalMap;
				uniforms.normalScale.value.copy(material.normalScale);
				if (material.side === BackSide) uniforms.normalScale.value.negate();
			}

			if (material.specularMap) {
				uniforms.specularMap.value = material.specularMap;
			}

			if (material.alphaTest > 0) {
				uniforms.alphaTest.value = material.alphaTest;
			}

			const envMap = properties.get(material).envMap;

			if (envMap) {
				uniforms.envMap.value = envMap;
				uniforms.flipEnvMap.value = envMap.isCubeTexture && envMap.isRenderTargetTexture === false ? -1 : 1;
				uniforms.reflectivity.value = material.reflectivity;
				uniforms.ior.value = material.ior;
				uniforms.refractionRatio.value = material.refractionRatio;
			}

			if (material.lightMap) {
				uniforms.lightMap.value = material.lightMap; // artist-friendly light intensity scaling factor

				const scaleFactor = renderer.physicallyCorrectLights !== true ? Math.PI : 1;
				uniforms.lightMapIntensity.value = material.lightMapIntensity * scaleFactor;
			}

			if (material.aoMap) {
				uniforms.aoMap.value = material.aoMap;
				uniforms.aoMapIntensity.value = material.aoMapIntensity;
			} // uv repeat and offset setting priorities
			// 1. color map
			// 2. specular map
			// 3. displacementMap map
			// 4. normal map
			// 5. bump map
			// 6. roughnessMap map
			// 7. metalnessMap map
			// 8. alphaMap map
			// 9. emissiveMap map
			// 10. clearcoat map
			// 11. clearcoat normal map
			// 12. clearcoat roughnessMap map
			// 13. iridescence map
			// 14. iridescence thickness map
			// 15. specular intensity map
			// 16. specular tint map
			// 17. transmission map
			// 18. thickness map


			let uvScaleMap;

			if (material.map) {
				uvScaleMap = material.map;
			} else if (material.specularMap) {
				uvScaleMap = material.specularMap;
			} else if (material.displacementMap) {
				uvScaleMap = material.displacementMap;
			} else if (material.normalMap) {
				uvScaleMap = material.normalMap;
			} else if (material.bumpMap) {
				uvScaleMap = material.bumpMap;
			} else if (material.roughnessMap) {
				uvScaleMap = material.roughnessMap;
			} else if (material.metalnessMap) {
				uvScaleMap = material.metalnessMap;
			} else if (material.alphaMap) {
				uvScaleMap = material.alphaMap;
			} else if (material.emissiveMap) {
				uvScaleMap = material.emissiveMap;
			} else if (material.clearcoatMap) {
				uvScaleMap = material.clearcoatMap;
			} else if (material.clearcoatNormalMap) {
				uvScaleMap = material.clearcoatNormalMap;
			} else if (material.clearcoatRoughnessMap) {
				uvScaleMap = material.clearcoatRoughnessMap;
			} else if (material.iridescenceMap) {
				uvScaleMap = material.iridescenceMap;
			} else if (material.iridescenceThicknessMap) {
				uvScaleMap = material.iridescenceThicknessMap;
			} else if (material.specularIntensityMap) {
				uvScaleMap = material.specularIntensityMap;
			} else if (material.specularColorMap) {
				uvScaleMap = material.specularColorMap;
			} else if (material.transmissionMap) {
				uvScaleMap = material.transmissionMap;
			} else if (material.thicknessMap) {
				uvScaleMap = material.thicknessMap;
			} else if (material.sheenColorMap) {
				uvScaleMap = material.sheenColorMap;
			} else if (material.sheenRoughnessMap) {
				uvScaleMap = material.sheenRoughnessMap;
			}

			if (uvScaleMap !== undefined) {
				// backwards compatibility
				if (uvScaleMap.isWebGLRenderTarget) {
					uvScaleMap = uvScaleMap.texture;
				}

				if (uvScaleMap.matrixAutoUpdate === true) {
					uvScaleMap.updateMatrix();
				}

				uniforms.uvTransform.value.copy(uvScaleMap.matrix);
			} // uv repeat and offset setting priorities for uv2
			// 1. ao map
			// 2. light map


			let uv2ScaleMap;

			if (material.aoMap) {
				uv2ScaleMap = material.aoMap;
			} else if (material.lightMap) {
				uv2ScaleMap = material.lightMap;
			}

			if (uv2ScaleMap !== undefined) {
				// backwards compatibility
				if (uv2ScaleMap.isWebGLRenderTarget) {
					uv2ScaleMap = uv2ScaleMap.texture;
				}

				if (uv2ScaleMap.matrixAutoUpdate === true) {
					uv2ScaleMap.updateMatrix();
				}

				uniforms.uv2Transform.value.copy(uv2ScaleMap.matrix);
			}
		}

		function refreshUniformsLine(uniforms, material) {
			uniforms.diffuse.value.copy(material.color);
			uniforms.opacity.value = material.opacity;
		}

		function refreshUniformsDash(uniforms, material) {
			uniforms.dashSize.value = material.dashSize;
			uniforms.totalSize.value = material.dashSize + material.gapSize;
			uniforms.scale.value = material.scale;
		}

		function refreshUniformsPoints(uniforms, material, pixelRatio, height) {
			uniforms.diffuse.value.copy(material.color);
			uniforms.opacity.value = material.opacity;
			uniforms.size.value = material.size * pixelRatio;
			uniforms.scale.value = height * 0.5;

			if (material.map) {
				uniforms.map.value = material.map;
			}

			if (material.alphaMap) {
				uniforms.alphaMap.value = material.alphaMap;
			}

			if (material.alphaTest > 0) {
				uniforms.alphaTest.value = material.alphaTest;
			} // uv repeat and offset setting priorities
			// 1. color map
			// 2. alpha map


			let uvScaleMap;

			if (material.map) {
				uvScaleMap = material.map;
			} else if (material.alphaMap) {
				uvScaleMap = material.alphaMap;
			}

			if (uvScaleMap !== undefined) {
				if (uvScaleMap.matrixAutoUpdate === true) {
					uvScaleMap.updateMatrix();
				}

				uniforms.uvTransform.value.copy(uvScaleMap.matrix);
			}
		}

		function refreshUniformsSprites(uniforms, material) {
			uniforms.diffuse.value.copy(material.color);
			uniforms.opacity.value = material.opacity;
			uniforms.rotation.value = material.rotation;

			if (material.map) {
				uniforms.map.value = material.map;
			}

			if (material.alphaMap) {
				uniforms.alphaMap.value = material.alphaMap;
			}

			if (material.alphaTest > 0) {
				uniforms.alphaTest.value = material.alphaTest;
			} // uv repeat and offset setting priorities
			// 1. color map
			// 2. alpha map


			let uvScaleMap;

			if (material.map) {
				uvScaleMap = material.map;
			} else if (material.alphaMap) {
				uvScaleMap = material.alphaMap;
			}

			if (uvScaleMap !== undefined) {
				if (uvScaleMap.matrixAutoUpdate === true) {
					uvScaleMap.updateMatrix();
				}

				uniforms.uvTransform.value.copy(uvScaleMap.matrix);
			}
		}

		function refreshUniformsPhong(uniforms, material) {
			uniforms.specular.value.copy(material.specular);
			uniforms.shininess.value = Math.max(material.shininess, 1e-4); // to prevent pow( 0.0, 0.0 )
		}

		function refreshUniformsToon(uniforms, material) {
			if (material.gradientMap) {
				uniforms.gradientMap.value = material.gradientMap;
			}
		}

		function refreshUniformsStandard(uniforms, material) {
			uniforms.roughness.value = material.roughness;
			uniforms.metalness.value = material.metalness;

			if (material.roughnessMap) {
				uniforms.roughnessMap.value = material.roughnessMap;
			}

			if (material.metalnessMap) {
				uniforms.metalnessMap.value = material.metalnessMap;
			}

			const envMap = properties.get(material).envMap;

			if (envMap) {
				//uniforms.envMap.value = material.envMap; // part of uniforms common
				uniforms.envMapIntensity.value = material.envMapIntensity;
			}
		}

		function refreshUniformsPhysical(uniforms, material, transmissionRenderTarget) {
			uniforms.ior.value = material.ior; // also part of uniforms common

			if (material.sheen > 0) {
				uniforms.sheenColor.value.copy(material.sheenColor).multiplyScalar(material.sheen);
				uniforms.sheenRoughness.value = material.sheenRoughness;

				if (material.sheenColorMap) {
					uniforms.sheenColorMap.value = material.sheenColorMap;
				}

				if (material.sheenRoughnessMap) {
					uniforms.sheenRoughnessMap.value = material.sheenRoughnessMap;
				}
			}

			if (material.clearcoat > 0) {
				uniforms.clearcoat.value = material.clearcoat;
				uniforms.clearcoatRoughness.value = material.clearcoatRoughness;

				if (material.clearcoatMap) {
					uniforms.clearcoatMap.value = material.clearcoatMap;
				}

				if (material.clearcoatRoughnessMap) {
					uniforms.clearcoatRoughnessMap.value = material.clearcoatRoughnessMap;
				}

				if (material.clearcoatNormalMap) {
					uniforms.clearcoatNormalScale.value.copy(material.clearcoatNormalScale);
					uniforms.clearcoatNormalMap.value = material.clearcoatNormalMap;

					if (material.side === BackSide) {
						uniforms.clearcoatNormalScale.value.negate();
					}
				}
			}

			if (material.iridescence > 0) {
				uniforms.iridescence.value = material.iridescence;
				uniforms.iridescenceIOR.value = material.iridescenceIOR;
				uniforms.iridescenceThicknessMinimum.value = material.iridescenceThicknessRange[0];
				uniforms.iridescenceThicknessMaximum.value = material.iridescenceThicknessRange[1];

				if (material.iridescenceMap) {
					uniforms.iridescenceMap.value = material.iridescenceMap;
				}

				if (material.iridescenceThicknessMap) {
					uniforms.iridescenceThicknessMap.value = material.iridescenceThicknessMap;
				}
			}

			if (material.transmission > 0) {
				uniforms.transmission.value = material.transmission;
				uniforms.transmissionSamplerMap.value = transmissionRenderTarget.texture;
				uniforms.transmissionSamplerSize.value.set(transmissionRenderTarget.width, transmissionRenderTarget.height);

				if (material.transmissionMap) {
					uniforms.transmissionMap.value = material.transmissionMap;
				}

				uniforms.thickness.value = material.thickness;

				if (material.thicknessMap) {
					uniforms.thicknessMap.value = material.thicknessMap;
				}

				uniforms.attenuationDistance.value = material.attenuationDistance;
				uniforms.attenuationColor.value.copy(material.attenuationColor);
			}

			uniforms.specularIntensity.value = material.specularIntensity;
			uniforms.specularColor.value.copy(material.specularColor);

			if (material.specularIntensityMap) {
				uniforms.specularIntensityMap.value = material.specularIntensityMap;
			}

			if (material.specularColorMap) {
				uniforms.specularColorMap.value = material.specularColorMap;
			}
		}

		function refreshUniformsMatcap(uniforms, material) {
			if (material.matcap) {
				uniforms.matcap.value = material.matcap;
			}
		}

		function refreshUniformsDistance(uniforms, material) {
			uniforms.referencePosition.value.copy(material.referencePosition);
			uniforms.nearDistance.value = material.nearDistance;
			uniforms.farDistance.value = material.farDistance;
		}

		return {
			refreshFogUniforms: refreshFogUniforms,
			refreshMaterialUniforms: refreshMaterialUniforms
		};
	}

	function WebGLUniformsGroups(gl, info, capabilities, state) {
		let buffers = {};
		let updateList = {};
		let allocatedBindingPoints = [];
		const maxBindingPoints = capabilities.isWebGL2 ? gl.getParameter(gl.MAX_UNIFORM_BUFFER_BINDINGS) : 0; // binding points are global whereas block indices are per shader program

		function bind(uniformsGroup, program) {
			const webglProgram = program.program;
			state.uniformBlockBinding(uniformsGroup, webglProgram);
		}

		function update(uniformsGroup, program) {
			let buffer = buffers[uniformsGroup.id];

			if (buffer === undefined) {
				prepareUniformsGroup(uniformsGroup);
				buffer = createBuffer(uniformsGroup);
				buffers[uniformsGroup.id] = buffer;
				uniformsGroup.addEventListener('dispose', onUniformsGroupsDispose);
			} // ensure to update the binding points/block indices mapping for this program


			const webglProgram = program.program;
			state.updateUBOMapping(uniformsGroup, webglProgram); // update UBO once per frame

			const frame = info.render.frame;

			if (updateList[uniformsGroup.id] !== frame) {
				updateBufferData(uniformsGroup);
				updateList[uniformsGroup.id] = frame;
			}
		}

		function createBuffer(uniformsGroup) {
			// the setup of an UBO is independent of a particular shader program but global
			const bindingPointIndex = allocateBindingPointIndex();
			uniformsGroup.__bindingPointIndex = bindingPointIndex;
			const buffer = gl.createBuffer();
			const size = uniformsGroup.__size;
			const usage = uniformsGroup.usage;
			gl.bindBuffer(gl.UNIFORM_BUFFER, buffer);
			gl.bufferData(gl.UNIFORM_BUFFER, size, usage);
			gl.bindBuffer(gl.UNIFORM_BUFFER, null);
			gl.bindBufferBase(gl.UNIFORM_BUFFER, bindingPointIndex, buffer);
			return buffer;
		}

		function allocateBindingPointIndex() {
			for (let i = 0; i < maxBindingPoints; i++) {
				if (allocatedBindingPoints.indexOf(i) === -1) {
					allocatedBindingPoints.push(i);
					return i;
				}
			}

			console.error('THREE.WebGLRenderer: Maximum number of simultaneously usable uniforms groups reached.');
			return 0;
		}

		function updateBufferData(uniformsGroup) {
			const buffer = buffers[uniformsGroup.id];
			const uniforms = uniformsGroup.uniforms;
			const cache = uniformsGroup.__cache;
			gl.bindBuffer(gl.UNIFORM_BUFFER, buffer);

			for (let i = 0, il = uniforms.length; i < il; i++) {
				const uniform = uniforms[i]; // partly update the buffer if necessary

				if (hasUniformChanged(uniform, i, cache) === true) {
					const value = uniform.value;
					const offset = uniform.__offset;

					if (typeof value === 'number') {
						uniform.__data[0] = value;
						gl.bufferSubData(gl.UNIFORM_BUFFER, offset, uniform.__data);
					} else {
						if (uniform.value.isMatrix3) {
							// manually converting 3x3 to 3x4
							uniform.__data[0] = uniform.value.elements[0];
							uniform.__data[1] = uniform.value.elements[1];
							uniform.__data[2] = uniform.value.elements[2];
							uniform.__data[3] = uniform.value.elements[0];
							uniform.__data[4] = uniform.value.elements[3];
							uniform.__data[5] = uniform.value.elements[4];
							uniform.__data[6] = uniform.value.elements[5];
							uniform.__data[7] = uniform.value.elements[0];
							uniform.__data[8] = uniform.value.elements[6];
							uniform.__data[9] = uniform.value.elements[7];
							uniform.__data[10] = uniform.value.elements[8];
							uniform.__data[11] = uniform.value.elements[0];
						} else {
							value.toArray(uniform.__data);
						}

						gl.bufferSubData(gl.UNIFORM_BUFFER, offset, uniform.__data);
					}
				}
			}

			gl.bindBuffer(gl.UNIFORM_BUFFER, null);
		}

		function hasUniformChanged(uniform, index, cache) {
			const value = uniform.value;

			if (cache[index] === undefined) {
				// cache entry does not exist so far
				if (typeof value === 'number') {
					cache[index] = value;
				} else {
					cache[index] = value.clone();
				}

				return true;
			} else {
				// compare current value with cached entry
				if (typeof value === 'number') {
					if (cache[index] !== value) {
						cache[index] = value;
						return true;
					}
				} else {
					const cachedObject = cache[index];

					if (cachedObject.equals(value) === false) {
						cachedObject.copy(value);
						return true;
					}
				}
			}

			return false;
		}

		function prepareUniformsGroup(uniformsGroup) {
			// determine total buffer size according to the STD140 layout
			// Hint: STD140 is the only supported layout in WebGL 2
			const uniforms = uniformsGroup.uniforms;
			let offset = 0; // global buffer offset in bytes

			const chunkSize = 16; // size of a chunk in bytes

			let chunkOffset = 0; // offset within a single chunk in bytes

			for (let i = 0, l = uniforms.length; i < l; i++) {
				const uniform = uniforms[i];
				const info = getUniformSize(uniform); // the following two properties will be used for partial buffer updates

				uniform.__data = new Float32Array(info.storage / Float32Array.BYTES_PER_ELEMENT);
				uniform.__offset = offset; //

				if (i > 0) {
					chunkOffset = offset % chunkSize;
					const remainingSizeInChunk = chunkSize - chunkOffset; // check for chunk overflow

					if (chunkOffset !== 0 && remainingSizeInChunk - info.boundary < 0) {
						// add padding and adjust offset
						offset += chunkSize - chunkOffset;
						uniform.__offset = offset;
					}
				}

				offset += info.storage;
			} // ensure correct final padding


			chunkOffset = offset % chunkSize;
			if (chunkOffset > 0) offset += chunkSize - chunkOffset; //

			uniformsGroup.__size = offset;
			uniformsGroup.__cache = {};
			return this;
		}

		function getUniformSize(uniform) {
			const value = uniform.value;
			const info = {
				boundary: 0,
				// bytes
				storage: 0 // bytes

			}; // determine sizes according to STD140

			if (typeof value === 'number') {
				// float/int
				info.boundary = 4;
				info.storage = 4;
			} else if (value.isVector2) {
				// vec2
				info.boundary = 8;
				info.storage = 8;
			} else if (value.isVector3 || value.isColor) {
				// vec3
				info.boundary = 16;
				info.storage = 12; // evil: vec3 must start on a 16-byte boundary but it only consumes 12 bytes
			} else if (value.isVector4) {
				// vec4
				info.boundary = 16;
				info.storage = 16;
			} else if (value.isMatrix3) {
				// mat3 (in STD140 a 3x3 matrix is represented as 3x4)
				info.boundary = 48;
				info.storage = 48;
			} else if (value.isMatrix4) {
				// mat4
				info.boundary = 64;
				info.storage = 64;
			} else if (value.isTexture) {
				console.warn('THREE.WebGLRenderer: Texture samplers can not be part of an uniforms group.');
			} else {
				console.warn('THREE.WebGLRenderer: Unsupported uniform value type.', value);
			}

			return info;
		}

		function onUniformsGroupsDispose(event) {
			const uniformsGroup = event.target;
			uniformsGroup.removeEventListener('dispose', onUniformsGroupsDispose);
			const index = allocatedBindingPoints.indexOf(uniformsGroup.__bindingPointIndex);
			allocatedBindingPoints.splice(index, 1);
			gl.deleteBuffer(buffers[uniformsGroup.id]);
			delete buffers[uniformsGroup.id];
			delete updateList[uniformsGroup.id];
		}

		function dispose() {
			for (const id in buffers) {
				gl.deleteBuffer(buffers[id]);
			}

			allocatedBindingPoints = [];
			buffers = {};
			updateList = {};
		}

		return {
			bind: bind,
			update: update,
			dispose: dispose
		};
	}

	function createCanvasElement() {
		const canvas = createElementNS('canvas');
		canvas.style.display = 'block';
		return canvas;
	}

	function WebGLRenderer(parameters = {}) {
		this.isWebGLRenderer = true;

		const _canvas = parameters.canvas !== undefined ? parameters.canvas : createCanvasElement(),
					_context = parameters.context !== undefined ? parameters.context : null,
					_depth = parameters.depth !== undefined ? parameters.depth : true,
					_stencil = parameters.stencil !== undefined ? parameters.stencil : true,
					_antialias = parameters.antialias !== undefined ? parameters.antialias : false,
					_premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,
					_preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : false,
					_powerPreference = parameters.powerPreference !== undefined ? parameters.powerPreference : 'default',
					_failIfMajorPerformanceCaveat = parameters.failIfMajorPerformanceCaveat !== undefined ? parameters.failIfMajorPerformanceCaveat : false;

		let _alpha;

		if (_context !== null) {
			_alpha = _context.getContextAttributes().alpha;
		} else {
			_alpha = parameters.alpha !== undefined ? parameters.alpha : false;
		}

		let currentRenderList = null;
		let currentRenderState = null; // render() can be called from within a callback triggered by another render.
		// We track this so that the nested render call gets its list and state isolated from the parent render call.

		const renderListStack = [];
		const renderStateStack = []; // public properties

		this.domElement = _canvas; // Debug configuration container

		this.debug = {
			/**
			 * Enables error checking and reporting when shader programs are being compiled
			 * @type {boolean}
			 */
			checkShaderErrors: true
		}; // clearing

		this.autoClear = true;
		this.autoClearColor = true;
		this.autoClearDepth = true;
		this.autoClearStencil = true; // scene graph

		this.sortObjects = true; // user-defined clipping

		this.clippingPlanes = [];
		this.localClippingEnabled = false; // physically based shading

		this.outputEncoding = LinearEncoding; // physical lights

		this.physicallyCorrectLights = false; // tone mapping

		this.toneMapping = NoToneMapping;
		this.toneMappingExposure = 1.0; //

		Object.defineProperties(this, {
			// @deprecated since r136, 0e21088102b4de7e0a0a33140620b7a3424b9e6d
			gammaFactor: {
				get: function () {
					console.warn('THREE.WebGLRenderer: .gammaFactor has been removed.');
					return 2;
				},
				set: function () {
					console.warn('THREE.WebGLRenderer: .gammaFactor has been removed.');
				}
			}
		}); // internal properties

		const _this = this;

		let _isContextLost = false; // internal state cache

		let _currentActiveCubeFace = 0;
		let _currentActiveMipmapLevel = 0;
		let _currentRenderTarget = null;

		let _currentMaterialId = -1;

		let _currentCamera = null;

		const _currentViewport = new Vector4();

		const _currentScissor = new Vector4();

		let _currentScissorTest = null; //

		let _width = _canvas.width;
		let _height = _canvas.height;
		let _pixelRatio = 1;
		let _opaqueSort = null;
		let _transparentSort = null;

		const _viewport = new Vector4(0, 0, _width, _height);

		const _scissor = new Vector4(0, 0, _width, _height);

		let _scissorTest = false; // frustum

		const _frustum = new Frustum(); // clipping


		let _clippingEnabled = false;
		let _localClippingEnabled = false; // transmission

		let _transmissionRenderTarget = null; // camera matrices cache

		const _projScreenMatrix = new Matrix4();

		const _vector2 = new Vector2();

		const _vector3 = new Vector3();

		const _emptyScene = {
			background: null,
			fog: null,
			environment: null,
			overrideMaterial: null,
			isScene: true
		};

		function getTargetPixelRatio() {
			return _currentRenderTarget === null ? _pixelRatio : 1;
		} // initialize


		let _gl = _context;

		function getContext(contextNames, contextAttributes) {
			for (let i = 0; i < contextNames.length; i++) {
				const contextName = contextNames[i];

				const context = _canvas.getContext(contextName, contextAttributes);

				if (context !== null) return context;
			}

			return null;
		}

		try {
			const contextAttributes = {
				alpha: true,
				depth: _depth,
				stencil: _stencil,
				antialias: _antialias,
				premultipliedAlpha: _premultipliedAlpha,
				preserveDrawingBuffer: _preserveDrawingBuffer,
				powerPreference: _powerPreference,
				failIfMajorPerformanceCaveat: _failIfMajorPerformanceCaveat
			}; // OffscreenCanvas does not have setAttribute, see #22811

			if ('setAttribute' in _canvas) _canvas.setAttribute('data-engine', `three.js r${REVISION}`); // event listeners must be registered before WebGL context is created, see #12753

			_canvas.addEventListener('webglcontextlost', onContextLost, false);

			_canvas.addEventListener('webglcontextrestored', onContextRestore, false);

			_canvas.addEventListener('webglcontextcreationerror', onContextCreationError, false);

			if (_gl === null) {
				const contextNames = ['webgl2', 'webgl', 'experimental-webgl'];

				if (_this.isWebGL1Renderer === true) {
					contextNames.shift();
				}

				_gl = getContext(contextNames, contextAttributes);

				if (_gl === null) {
					if (getContext(contextNames)) {
						throw new Error('Error creating WebGL context with your selected attributes.');
					} else {
						throw new Error('Error creating WebGL context.');
					}
				}
			} // Some experimental-webgl implementations do not have getShaderPrecisionFormat


			if (_gl.getShaderPrecisionFormat === undefined) {
				_gl.getShaderPrecisionFormat = function () {
					return {
						'rangeMin': 1,
						'rangeMax': 1,
						'precision': 1
					};
				};
			}
		} catch (error) {
			console.error('THREE.WebGLRenderer: ' + error.message);
			throw error;
		}

		let extensions, capabilities, state, info;
		let properties, textures, cubemaps, cubeuvmaps, attributes, geometries, objects;
		let programCache, materials, renderLists, renderStates, clipping, shadowMap;
		let background, morphtargets, bufferRenderer, indexedBufferRenderer;
		let utils, bindingStates, uniformsGroups;

		function initGLContext() {
			extensions = new WebGLExtensions(_gl);
			capabilities = new WebGLCapabilities(_gl, extensions, parameters);
			extensions.init(capabilities);
			utils = new WebGLUtils(_gl, extensions, capabilities);
			state = new WebGLState(_gl, extensions, capabilities);
			info = new WebGLInfo(_gl);
			properties = new WebGLProperties();
			textures = new WebGLTextures(_gl, extensions, state, properties, capabilities, utils, info);
			cubemaps = new WebGLCubeMaps(_this);
			cubeuvmaps = new WebGLCubeUVMaps(_this);
			attributes = new WebGLAttributes(_gl, capabilities);
			bindingStates = new WebGLBindingStates(_gl, extensions, attributes, capabilities);
			geometries = new WebGLGeometries(_gl, attributes, info, bindingStates);
			objects = new WebGLObjects(_gl, geometries, attributes, info);
			morphtargets = new WebGLMorphtargets(_gl, capabilities, textures);
			clipping = new WebGLClipping(properties);
			programCache = new WebGLPrograms(_this, cubemaps, cubeuvmaps, extensions, capabilities, bindingStates, clipping);
			materials = new WebGLMaterials(_this, properties);
			renderLists = new WebGLRenderLists();
			renderStates = new WebGLRenderStates(extensions, capabilities);
			background = new WebGLBackground(_this, cubemaps, state, objects, _alpha, _premultipliedAlpha);
			shadowMap = new WebGLShadowMap(_this, objects, capabilities);
			uniformsGroups = new WebGLUniformsGroups(_gl, info, capabilities, state);
			bufferRenderer = new WebGLBufferRenderer(_gl, extensions, info, capabilities);
			indexedBufferRenderer = new WebGLIndexedBufferRenderer(_gl, extensions, info, capabilities);
			info.programs = programCache.programs;
			_this.capabilities = capabilities;
			_this.extensions = extensions;
			_this.properties = properties;
			_this.renderLists = renderLists;
			_this.shadowMap = shadowMap;
			_this.state = state;
			_this.info = info;
		}

		initGLContext(); // xr

		const xr = new WebXRManager(_this, _gl);
		this.xr = xr; // API

		this.getContext = function () {
			return _gl;
		};

		this.getContextAttributes = function () {
			return _gl.getContextAttributes();
		};

		this.forceContextLoss = function () {
			const extension = extensions.get('WEBGL_lose_context');
			if (extension) extension.loseContext();
		};

		this.forceContextRestore = function () {
			const extension = extensions.get('WEBGL_lose_context');
			if (extension) extension.restoreContext();
		};

		this.getPixelRatio = function () {
			return _pixelRatio;
		};

		this.setPixelRatio = function (value) {
			if (value === undefined) return;
			_pixelRatio = value;
			this.setSize(_width, _height, false);
		};

		this.getSize = function (target) {
			return target.set(_width, _height);
		};

		this.setSize = function (width, height, updateStyle) {
			if (xr.isPresenting) {
				console.warn('THREE.WebGLRenderer: Can\'t change size while VR device is presenting.');
				return;
			}

			_width = width;
			_height = height;
			_canvas.width = Math.floor(width * _pixelRatio);
			_canvas.height = Math.floor(height * _pixelRatio);

			if (updateStyle !== false) {
				_canvas.style.width = width + 'px';
				_canvas.style.height = height + 'px';
			}

			this.setViewport(0, 0, width, height);
		};

		this.getDrawingBufferSize = function (target) {
			return target.set(_width * _pixelRatio, _height * _pixelRatio).floor();
		};

		this.setDrawingBufferSize = function (width, height, pixelRatio) {
			_width = width;
			_height = height;
			_pixelRatio = pixelRatio;
			_canvas.width = Math.floor(width * pixelRatio);
			_canvas.height = Math.floor(height * pixelRatio);
			this.setViewport(0, 0, width, height);
		};

		this.getCurrentViewport = function (target) {
			return target.copy(_currentViewport);
		};

		this.getViewport = function (target) {
			return target.copy(_viewport);
		};

		this.setViewport = function (x, y, width, height) {
			if (x.isVector4) {
				_viewport.set(x.x, x.y, x.z, x.w);
			} else {
				_viewport.set(x, y, width, height);
			}

			state.viewport(_currentViewport.copy(_viewport).multiplyScalar(_pixelRatio).floor());
		};

		this.getScissor = function (target) {
			return target.copy(_scissor);
		};

		this.setScissor = function (x, y, width, height) {
			if (x.isVector4) {
				_scissor.set(x.x, x.y, x.z, x.w);
			} else {
				_scissor.set(x, y, width, height);
			}

			state.scissor(_currentScissor.copy(_scissor).multiplyScalar(_pixelRatio).floor());
		};

		this.getScissorTest = function () {
			return _scissorTest;
		};

		this.setScissorTest = function (boolean) {
			state.setScissorTest(_scissorTest = boolean);
		};

		this.setOpaqueSort = function (method) {
			_opaqueSort = method;
		};

		this.setTransparentSort = function (method) {
			_transparentSort = method;
		}; // Clearing


		this.getClearColor = function (target) {
			return target.copy(background.getClearColor());
		};

		this.setClearColor = function () {
			background.setClearColor.apply(background, arguments);
		};

		this.getClearAlpha = function () {
			return background.getClearAlpha();
		};

		this.setClearAlpha = function () {
			background.setClearAlpha.apply(background, arguments);
		};

		this.clear = function (color = true, depth = true, stencil = true) {
			let bits = 0;
			if (color) bits |= _gl.COLOR_BUFFER_BIT;
			if (depth) bits |= _gl.DEPTH_BUFFER_BIT;
			if (stencil) bits |= _gl.STENCIL_BUFFER_BIT;

			_gl.clear(bits);
		};

		this.clearColor = function () {
			this.clear(true, false, false);
		};

		this.clearDepth = function () {
			this.clear(false, true, false);
		};

		this.clearStencil = function () {
			this.clear(false, false, true);
		}; //


		this.dispose = function () {
			_canvas.removeEventListener('webglcontextlost', onContextLost, false);

			_canvas.removeEventListener('webglcontextrestored', onContextRestore, false);

			_canvas.removeEventListener('webglcontextcreationerror', onContextCreationError, false);

			renderLists.dispose();
			renderStates.dispose();
			properties.dispose();
			cubemaps.dispose();
			cubeuvmaps.dispose();
			objects.dispose();
			bindingStates.dispose();
			uniformsGroups.dispose();
			programCache.dispose();
			xr.dispose();
			xr.removeEventListener('sessionstart', onXRSessionStart);
			xr.removeEventListener('sessionend', onXRSessionEnd);

			if (_transmissionRenderTarget) {
				_transmissionRenderTarget.dispose();

				_transmissionRenderTarget = null;
			}

			animation.stop();
		}; // Events


		function onContextLost(event) {
			event.preventDefault();
			console.log('THREE.WebGLRenderer: Context Lost.');
			_isContextLost = true;
		}

		function
			/* event */
		onContextRestore() {
			console.log('THREE.WebGLRenderer: Context Restored.');
			_isContextLost = false;
			const infoAutoReset = info.autoReset;
			const shadowMapEnabled = shadowMap.enabled;
			const shadowMapAutoUpdate = shadowMap.autoUpdate;
			const shadowMapNeedsUpdate = shadowMap.needsUpdate;
			const shadowMapType = shadowMap.type;
			initGLContext();
			info.autoReset = infoAutoReset;
			shadowMap.enabled = shadowMapEnabled;
			shadowMap.autoUpdate = shadowMapAutoUpdate;
			shadowMap.needsUpdate = shadowMapNeedsUpdate;
			shadowMap.type = shadowMapType;
		}

		function onContextCreationError(event) {
			console.error('THREE.WebGLRenderer: A WebGL context could not be created. Reason: ', event.statusMessage);
		}

		function onMaterialDispose(event) {
			const material = event.target;
			material.removeEventListener('dispose', onMaterialDispose);
			deallocateMaterial(material);
		} // Buffer deallocation


		function deallocateMaterial(material) {
			releaseMaterialProgramReferences(material);
			properties.remove(material);
		}

		function releaseMaterialProgramReferences(material) {
			const programs = properties.get(material).programs;

			if (programs !== undefined) {
				programs.forEach(function (program) {
					programCache.releaseProgram(program);
				});

				if (material.isShaderMaterial) {
					programCache.releaseShaderCache(material);
				}
			}
		} // Buffer rendering


		this.renderBufferDirect = function (camera, scene, geometry, material, object, group) {
			if (scene === null) scene = _emptyScene; // renderBufferDirect second parameter used to be fog (could be null)

			const frontFaceCW = object.isMesh && object.matrixWorld.determinant() < 0;
			const program = setProgram(camera, scene, geometry, material, object);
			state.setMaterial(material, frontFaceCW); //

			let index = geometry.index;
			const position = geometry.attributes.position; //

			if (index === null) {
				if (position === undefined || position.count === 0) return;
			} else if (index.count === 0) {
				return;
			} //


			let rangeFactor = 1;

			if (material.wireframe === true) {
				index = geometries.getWireframeAttribute(geometry);
				rangeFactor = 2;
			}

			bindingStates.setup(object, material, program, geometry, index);
			let attribute;
			let renderer = bufferRenderer;

			if (index !== null) {
				attribute = attributes.get(index);
				renderer = indexedBufferRenderer;
				renderer.setIndex(attribute);
			} //


			const dataCount = index !== null ? index.count : position.count;
			const rangeStart = geometry.drawRange.start * rangeFactor;
			const rangeCount = geometry.drawRange.count * rangeFactor;
			const groupStart = group !== null ? group.start * rangeFactor : 0;
			const groupCount = group !== null ? group.count * rangeFactor : Infinity;
			const drawStart = Math.max(rangeStart, groupStart);
			const drawEnd = Math.min(dataCount, rangeStart + rangeCount, groupStart + groupCount) - 1;
			const drawCount = Math.max(0, drawEnd - drawStart + 1);
			if (drawCount === 0) return; //

			if (object.isMesh) {
				if (material.wireframe === true) {
					state.setLineWidth(material.wireframeLinewidth * getTargetPixelRatio());
					renderer.setMode(_gl.LINES);
				} else {
					renderer.setMode(_gl.TRIANGLES);
				}
			} else if (object.isLine) {
				let lineWidth = material.linewidth;
				if (lineWidth === undefined) lineWidth = 1; // Not using Line*Material

				state.setLineWidth(lineWidth * getTargetPixelRatio());

				if (object.isLineSegments) {
					renderer.setMode(_gl.LINES);
				} else if (object.isLineLoop) {
					renderer.setMode(_gl.LINE_LOOP);
				} else {
					renderer.setMode(_gl.LINE_STRIP);
				}
			} else if (object.isPoints) {
				renderer.setMode(_gl.POINTS);
			} else if (object.isSprite) {
				renderer.setMode(_gl.TRIANGLES);
			}

			if (object.isInstancedMesh) {
				renderer.renderInstances(drawStart, drawCount, object.count);
			} else if (geometry.isInstancedBufferGeometry) {
				const instanceCount = Math.min(geometry.instanceCount, geometry._maxInstanceCount);
				renderer.renderInstances(drawStart, drawCount, instanceCount);
			} else {
				renderer.render(drawStart, drawCount);
			}
		}; // Compile


		this.compile = function (scene, camera) {
			currentRenderState = renderStates.get(scene);
			currentRenderState.init();
			renderStateStack.push(currentRenderState);
			scene.traverseVisible(function (object) {
				if (object.isLight && object.layers.test(camera.layers)) {
					currentRenderState.pushLight(object);

					if (object.castShadow) {
						currentRenderState.pushShadow(object);
					}
				}
			});
			currentRenderState.setupLights(_this.physicallyCorrectLights);
			scene.traverse(function (object) {
				const material = object.material;

				if (material) {
					if (Array.isArray(material)) {
						for (let i = 0; i < material.length; i++) {
							const material2 = material[i];
							getProgram(material2, scene, object);
						}
					} else {
						getProgram(material, scene, object);
					}
				}
			});
			renderStateStack.pop();
			currentRenderState = null;
		}; // Animation Loop


		let onAnimationFrameCallback = null;

		function onAnimationFrame(time) {
			if (onAnimationFrameCallback) onAnimationFrameCallback(time);
		}

		function onXRSessionStart() {
			animation.stop();
		}

		function onXRSessionEnd() {
			animation.start();
		}

		const animation = new WebGLAnimation();
		animation.setAnimationLoop(onAnimationFrame);
		if (typeof self !== 'undefined') animation.setContext(self);

		this.setAnimationLoop = function (callback) {
			onAnimationFrameCallback = callback;
			xr.setAnimationLoop(callback);
			callback === null ? animation.stop() : animation.start();
		};

		xr.addEventListener('sessionstart', onXRSessionStart);
		xr.addEventListener('sessionend', onXRSessionEnd); // Rendering

		this.render = function (scene, camera) {
			if (camera !== undefined && camera.isCamera !== true) {
				console.error('THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.');
				return;
			}

			if (_isContextLost === true) return; // update scene graph

			if (scene.autoUpdate === true) scene.updateMatrixWorld(); // update camera matrices and frustum

			if (camera.parent === null) camera.updateMatrixWorld();

			if (xr.enabled === true && xr.isPresenting === true) {
				if (xr.cameraAutoUpdate === true) xr.updateCamera(camera);
				camera = xr.getCamera(); // use XR camera for rendering
			} //


			if (scene.isScene === true) scene.onBeforeRender(_this, scene, camera, _currentRenderTarget);
			currentRenderState = renderStates.get(scene, renderStateStack.length);
			currentRenderState.init();
			renderStateStack.push(currentRenderState);

			_projScreenMatrix.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);

			_frustum.setFromProjectionMatrix(_projScreenMatrix);

			_localClippingEnabled = this.localClippingEnabled;
			_clippingEnabled = clipping.init(this.clippingPlanes, _localClippingEnabled, camera);
			currentRenderList = renderLists.get(scene, renderListStack.length);
			currentRenderList.init();
			renderListStack.push(currentRenderList);
			projectObject(scene, camera, 0, _this.sortObjects);
			currentRenderList.finish();

			if (_this.sortObjects === true) {
				currentRenderList.sort(_opaqueSort, _transparentSort);
			} //


			if (_clippingEnabled === true) clipping.beginShadows();
			const shadowsArray = currentRenderState.state.shadowsArray;
			shadowMap.render(shadowsArray, scene, camera);
			if (_clippingEnabled === true) clipping.endShadows(); //

			if (this.info.autoReset === true) this.info.reset(); //

			background.render(currentRenderList, scene); // render scene

			currentRenderState.setupLights(_this.physicallyCorrectLights);

			if (camera.isArrayCamera) {
				const cameras = camera.cameras;

				for (let i = 0, l = cameras.length; i < l; i++) {
					const camera2 = cameras[i];
					renderScene(currentRenderList, scene, camera2, camera2.viewport);
				}
			} else {
				renderScene(currentRenderList, scene, camera);
			} //


			if (_currentRenderTarget !== null) {
				// resolve multisample renderbuffers to a single-sample texture if necessary
				textures.updateMultisampleRenderTarget(_currentRenderTarget); // Generate mipmap if we're using any kind of mipmap filtering

				textures.updateRenderTargetMipmap(_currentRenderTarget);
			} //


			if (scene.isScene === true) scene.onAfterRender(_this, scene, camera); // _gl.finish();

			bindingStates.resetDefaultState();
			_currentMaterialId = -1;
			_currentCamera = null;
			renderStateStack.pop();

			if (renderStateStack.length > 0) {
				currentRenderState = renderStateStack[renderStateStack.length - 1];
			} else {
				currentRenderState = null;
			}

			renderListStack.pop();

			if (renderListStack.length > 0) {
				currentRenderList = renderListStack[renderListStack.length - 1];
			} else {
				currentRenderList = null;
			}
		};

		function projectObject(object, camera, groupOrder, sortObjects) {
			if (object.visible === false) return;
			const visible = object.layers.test(camera.layers);

			if (visible) {
				if (object.isGroup) {
					groupOrder = object.renderOrder;
				} else if (object.isLOD) {
					if (object.autoUpdate === true) object.update(camera);
				} else if (object.isLight) {
					currentRenderState.pushLight(object);

					if (object.castShadow) {
						currentRenderState.pushShadow(object);
					}
				} else if (object.isSprite) {
					if (!object.frustumCulled || _frustum.intersectsSprite(object)) {
						if (sortObjects) {
							_vector3.setFromMatrixPosition(object.matrixWorld).applyMatrix4(_projScreenMatrix);
						}

						const geometry = objects.update(object);
						const material = object.material;

						if (material.visible) {
							currentRenderList.push(object, geometry, material, groupOrder, _vector3.z, null);
						}
					}
				} else if (object.isMesh || object.isLine || object.isPoints) {
					if (object.isSkinnedMesh) {
						// update skeleton only once in a frame
						if (object.skeleton.frame !== info.render.frame) {
							object.skeleton.update();
							object.skeleton.frame = info.render.frame;
						}
					}

					if (!object.frustumCulled || _frustum.intersectsObject(object)) {
						if (sortObjects) {
							_vector3.setFromMatrixPosition(object.matrixWorld).applyMatrix4(_projScreenMatrix);
						}

						const geometry = objects.update(object);
						const material = object.material;

						if (Array.isArray(material)) {
							const groups = geometry.groups;

							for (let i = 0, l = groups.length; i < l; i++) {
								const group = groups[i];
								const groupMaterial = material[group.materialIndex];

								if (groupMaterial && groupMaterial.visible) {
									currentRenderList.push(object, geometry, groupMaterial, groupOrder, _vector3.z, group);
								}
							}
						} else if (material.visible) {
							currentRenderList.push(object, geometry, material, groupOrder, _vector3.z, null);
						}
					}
				}
			}

			const children = object.children;

			for (let i = 0, l = children.length; i < l; i++) {
				projectObject(children[i], camera, groupOrder, sortObjects);
			}
		}

		function renderScene(currentRenderList, scene, camera, viewport) {
			const opaqueObjects = currentRenderList.opaque;
			const transmissiveObjects = currentRenderList.transmissive;
			const transparentObjects = currentRenderList.transparent;
			currentRenderState.setupLightsView(camera);
			if (transmissiveObjects.length > 0) renderTransmissionPass(opaqueObjects, scene, camera);
			if (viewport) state.viewport(_currentViewport.copy(viewport));
			if (opaqueObjects.length > 0) renderObjects(opaqueObjects, scene, camera);
			if (transmissiveObjects.length > 0) renderObjects(transmissiveObjects, scene, camera);
			if (transparentObjects.length > 0) renderObjects(transparentObjects, scene, camera); // Ensure depth buffer writing is enabled so it can be cleared on next render

			state.buffers.depth.setTest(true);
			state.buffers.depth.setMask(true);
			state.buffers.color.setMask(true);
			state.setPolygonOffset(false);
		}

		function renderTransmissionPass(opaqueObjects, scene, camera) {
			const isWebGL2 = capabilities.isWebGL2;

			if (_transmissionRenderTarget === null) {
				_transmissionRenderTarget = new WebGLRenderTarget(1, 1, {
					generateMipmaps: true,
					type: extensions.has('EXT_color_buffer_half_float') ? HalfFloatType : UnsignedByteType,
					minFilter: LinearMipmapLinearFilter,
					samples: isWebGL2 && _antialias === true ? 4 : 0
				});
			}

			_this.getDrawingBufferSize(_vector2);

			if (isWebGL2) {
				_transmissionRenderTarget.setSize(_vector2.x, _vector2.y);
			} else {
				_transmissionRenderTarget.setSize(floorPowerOfTwo(_vector2.x), floorPowerOfTwo(_vector2.y));
			} //


			const currentRenderTarget = _this.getRenderTarget();

			_this.setRenderTarget(_transmissionRenderTarget);

			_this.clear(); // Turn off the features which can affect the frag color for opaque objects pass.
			// Otherwise they are applied twice in opaque objects pass and transmission objects pass.


			const currentToneMapping = _this.toneMapping;
			_this.toneMapping = NoToneMapping;
			renderObjects(opaqueObjects, scene, camera);
			_this.toneMapping = currentToneMapping;
			textures.updateMultisampleRenderTarget(_transmissionRenderTarget);
			textures.updateRenderTargetMipmap(_transmissionRenderTarget);

			_this.setRenderTarget(currentRenderTarget);
		}

		function renderObjects(renderList, scene, camera) {
			const overrideMaterial = scene.isScene === true ? scene.overrideMaterial : null;

			for (let i = 0, l = renderList.length; i < l; i++) {
				const renderItem = renderList[i];
				const object = renderItem.object;
				const geometry = renderItem.geometry;
				const material = overrideMaterial === null ? renderItem.material : overrideMaterial;
				const group = renderItem.group;

				if (object.layers.test(camera.layers)) {
					renderObject(object, scene, camera, geometry, material, group);
				}
			}
		}

		function renderObject(object, scene, camera, geometry, material, group) {
			object.onBeforeRender(_this, scene, camera, geometry, material, group);
			object.modelViewMatrix.multiplyMatrices(camera.matrixWorldInverse, object.matrixWorld);
			object.normalMatrix.getNormalMatrix(object.modelViewMatrix);
			material.onBeforeRender(_this, scene, camera, geometry, object, group);

			if (material.transparent === true && material.side === DoubleSide) {
				material.side = BackSide;
				material.needsUpdate = true;

				_this.renderBufferDirect(camera, scene, geometry, material, object, group);

				material.side = FrontSide;
				material.needsUpdate = true;

				_this.renderBufferDirect(camera, scene, geometry, material, object, group);

				material.side = DoubleSide;
			} else {
				_this.renderBufferDirect(camera, scene, geometry, material, object, group);
			}

			object.onAfterRender(_this, scene, camera, geometry, material, group);
		}

		function getProgram(material, scene, object) {
			if (scene.isScene !== true) scene = _emptyScene; // scene could be a Mesh, Line, Points, ...

			const materialProperties = properties.get(material);
			const lights = currentRenderState.state.lights;
			const shadowsArray = currentRenderState.state.shadowsArray;
			const lightsStateVersion = lights.state.version;
			const parameters = programCache.getParameters(material, lights.state, shadowsArray, scene, object);
			const programCacheKey = programCache.getProgramCacheKey(parameters);
			let programs = materialProperties.programs; // always update environment and fog - changing these trigger an getProgram call, but it's possible that the program doesn't change

			materialProperties.environment = material.isMeshStandardMaterial ? scene.environment : null;
			materialProperties.fog = scene.fog;
			materialProperties.envMap = (material.isMeshStandardMaterial ? cubeuvmaps : cubemaps).get(material.envMap || materialProperties.environment);

			if (programs === undefined) {
				// new material
				material.addEventListener('dispose', onMaterialDispose);
				programs = new Map();
				materialProperties.programs = programs;
			}

			let program = programs.get(programCacheKey);

			if (program !== undefined) {
				// early out if program and light state is identical
				if (materialProperties.currentProgram === program && materialProperties.lightsStateVersion === lightsStateVersion) {
					updateCommonMaterialProperties(material, parameters);
					return program;
				}
			} else {
				parameters.uniforms = programCache.getUniforms(material);
				material.onBuild(object, parameters, _this);
				material.onBeforeCompile(parameters, _this);
				program = programCache.acquireProgram(parameters, programCacheKey);
				programs.set(programCacheKey, program);
				materialProperties.uniforms = parameters.uniforms;
			}

			const uniforms = materialProperties.uniforms;

			if (!material.isShaderMaterial && !material.isRawShaderMaterial || material.clipping === true) {
				uniforms.clippingPlanes = clipping.uniform;
			}

			updateCommonMaterialProperties(material, parameters); // store the light setup it was created for

			materialProperties.needsLights = materialNeedsLights(material);
			materialProperties.lightsStateVersion = lightsStateVersion;

			if (materialProperties.needsLights) {
				// wire up the material to this renderer's lighting state
				uniforms.ambientLightColor.value = lights.state.ambient;
				uniforms.lightProbe.value = lights.state.probe;
				uniforms.directionalLights.value = lights.state.directional;
				uniforms.directionalLightShadows.value = lights.state.directionalShadow;
				uniforms.spotLights.value = lights.state.spot;
				uniforms.spotLightShadows.value = lights.state.spotShadow;
				uniforms.rectAreaLights.value = lights.state.rectArea;
				uniforms.ltc_1.value = lights.state.rectAreaLTC1;
				uniforms.ltc_2.value = lights.state.rectAreaLTC2;
				uniforms.pointLights.value = lights.state.point;
				uniforms.pointLightShadows.value = lights.state.pointShadow;
				uniforms.hemisphereLights.value = lights.state.hemi;
				uniforms.directionalShadowMap.value = lights.state.directionalShadowMap;
				uniforms.directionalShadowMatrix.value = lights.state.directionalShadowMatrix;
				uniforms.spotShadowMap.value = lights.state.spotShadowMap;
				uniforms.spotShadowMatrix.value = lights.state.spotShadowMatrix;
				uniforms.pointShadowMap.value = lights.state.pointShadowMap;
				uniforms.pointShadowMatrix.value = lights.state.pointShadowMatrix; // TODO (abelnation): add area lights shadow info to uniforms
			}

			const progUniforms = program.getUniforms();
			const uniformsList = WebGLUniforms.seqWithValue(progUniforms.seq, uniforms);
			materialProperties.currentProgram = program;
			materialProperties.uniformsList = uniformsList;
			return program;
		}

		function updateCommonMaterialProperties(material, parameters) {
			const materialProperties = properties.get(material);
			materialProperties.outputEncoding = parameters.outputEncoding;
			materialProperties.instancing = parameters.instancing;
			materialProperties.skinning = parameters.skinning;
			materialProperties.morphTargets = parameters.morphTargets;
			materialProperties.morphNormals = parameters.morphNormals;
			materialProperties.morphColors = parameters.morphColors;
			materialProperties.morphTargetsCount = parameters.morphTargetsCount;
			materialProperties.numClippingPlanes = parameters.numClippingPlanes;
			materialProperties.numIntersection = parameters.numClipIntersection;
			materialProperties.vertexAlphas = parameters.vertexAlphas;
			materialProperties.vertexTangents = parameters.vertexTangents;
			materialProperties.toneMapping = parameters.toneMapping;
		}

		function setProgram(camera, scene, geometry, material, object) {
			if (scene.isScene !== true) scene = _emptyScene; // scene could be a Mesh, Line, Points, ...

			textures.resetTextureUnits();
			const fog = scene.fog;
			const environment = material.isMeshStandardMaterial ? scene.environment : null;
			const encoding = _currentRenderTarget === null ? _this.outputEncoding : _currentRenderTarget.isXRRenderTarget === true ? _currentRenderTarget.texture.encoding : LinearEncoding;
			const envMap = (material.isMeshStandardMaterial ? cubeuvmaps : cubemaps).get(material.envMap || environment);
			const vertexAlphas = material.vertexColors === true && !!geometry.attributes.color && geometry.attributes.color.itemSize === 4;
			const vertexTangents = !!material.normalMap && !!geometry.attributes.tangent;
			const morphTargets = !!geometry.morphAttributes.position;
			const morphNormals = !!geometry.morphAttributes.normal;
			const morphColors = !!geometry.morphAttributes.color;
			const toneMapping = material.toneMapped ? _this.toneMapping : NoToneMapping;
			const morphAttribute = geometry.morphAttributes.position || geometry.morphAttributes.normal || geometry.morphAttributes.color;
			const morphTargetsCount = morphAttribute !== undefined ? morphAttribute.length : 0;
			const materialProperties = properties.get(material);
			const lights = currentRenderState.state.lights;

			if (_clippingEnabled === true) {
				if (_localClippingEnabled === true || camera !== _currentCamera) {
					const useCache = camera === _currentCamera && material.id === _currentMaterialId; // we might want to call this function with some ClippingGroup
					// object instead of the material, once it becomes feasible
					// (#8465, #8379)

					clipping.setState(material, camera, useCache);
				}
			} //


			let needsProgramChange = false;

			if (material.version === materialProperties.__version) {
				if (materialProperties.needsLights && materialProperties.lightsStateVersion !== lights.state.version) {
					needsProgramChange = true;
				} else if (materialProperties.outputEncoding !== encoding) {
					needsProgramChange = true;
				} else if (object.isInstancedMesh && materialProperties.instancing === false) {
					needsProgramChange = true;
				} else if (!object.isInstancedMesh && materialProperties.instancing === true) {
					needsProgramChange = true;
				} else if (object.isSkinnedMesh && materialProperties.skinning === false) {
					needsProgramChange = true;
				} else if (!object.isSkinnedMesh && materialProperties.skinning === true) {
					needsProgramChange = true;
				} else if (materialProperties.envMap !== envMap) {
					needsProgramChange = true;
				} else if (material.fog === true && materialProperties.fog !== fog) {
					needsProgramChange = true;
				} else if (materialProperties.numClippingPlanes !== undefined && (materialProperties.numClippingPlanes !== clipping.numPlanes || materialProperties.numIntersection !== clipping.numIntersection)) {
					needsProgramChange = true;
				} else if (materialProperties.vertexAlphas !== vertexAlphas) {
					needsProgramChange = true;
				} else if (materialProperties.vertexTangents !== vertexTangents) {
					needsProgramChange = true;
				} else if (materialProperties.morphTargets !== morphTargets) {
					needsProgramChange = true;
				} else if (materialProperties.morphNormals !== morphNormals) {
					needsProgramChange = true;
				} else if (materialProperties.morphColors !== morphColors) {
					needsProgramChange = true;
				} else if (materialProperties.toneMapping !== toneMapping) {
					needsProgramChange = true;
				} else if (capabilities.isWebGL2 === true && materialProperties.morphTargetsCount !== morphTargetsCount) {
					needsProgramChange = true;
				}
			} else {
				needsProgramChange = true;
				materialProperties.__version = material.version;
			} //


			let program = materialProperties.currentProgram;

			if (needsProgramChange === true) {
				program = getProgram(material, scene, object);
			}

			let refreshProgram = false;
			let refreshMaterial = false;
			let refreshLights = false;
			const p_uniforms = program.getUniforms(),
						m_uniforms = materialProperties.uniforms;

			if (state.useProgram(program.program)) {
				refreshProgram = true;
				refreshMaterial = true;
				refreshLights = true;
			}

			if (material.id !== _currentMaterialId) {
				_currentMaterialId = material.id;
				refreshMaterial = true;
			}

			if (refreshProgram || _currentCamera !== camera) {
				p_uniforms.setValue(_gl, 'projectionMatrix', camera.projectionMatrix);

				if (capabilities.logarithmicDepthBuffer) {
					p_uniforms.setValue(_gl, 'logDepthBufFC', 2.0 / (Math.log(camera.far + 1.0) / Math.LN2));
				}

				if (_currentCamera !== camera) {
					_currentCamera = camera; // lighting uniforms depend on the camera so enforce an update
					// now, in case this material supports lights - or later, when
					// the next material that does gets activated:

					refreshMaterial = true; // set to true on material change

					refreshLights = true; // remains set until update done
				} // load material specific uniforms
				// (shader material also gets them for the sake of genericity)


				if (material.isShaderMaterial || material.isMeshPhongMaterial || material.isMeshToonMaterial || material.isMeshStandardMaterial || material.envMap) {
					const uCamPos = p_uniforms.map.cameraPosition;

					if (uCamPos !== undefined) {
						uCamPos.setValue(_gl, _vector3.setFromMatrixPosition(camera.matrixWorld));
					}
				}

				if (material.isMeshPhongMaterial || material.isMeshToonMaterial || material.isMeshLambertMaterial || material.isMeshBasicMaterial || material.isMeshStandardMaterial || material.isShaderMaterial) {
					p_uniforms.setValue(_gl, 'isOrthographic', camera.isOrthographicCamera === true);
				}

				if (material.isMeshPhongMaterial || material.isMeshToonMaterial || material.isMeshLambertMaterial || material.isMeshBasicMaterial || material.isMeshStandardMaterial || material.isShaderMaterial || material.isShadowMaterial || object.isSkinnedMesh) {
					p_uniforms.setValue(_gl, 'viewMatrix', camera.matrixWorldInverse);
				}
			} // skinning and morph target uniforms must be set even if material didn't change
			// auto-setting of texture unit for bone and morph texture must go before other textures
			// otherwise textures used for skinning and morphing can take over texture units reserved for other material textures


			if (object.isSkinnedMesh) {
				p_uniforms.setOptional(_gl, object, 'bindMatrix');
				p_uniforms.setOptional(_gl, object, 'bindMatrixInverse');
				const skeleton = object.skeleton;

				if (skeleton) {
					if (capabilities.floatVertexTextures) {
						if (skeleton.boneTexture === null) skeleton.computeBoneTexture();
						p_uniforms.setValue(_gl, 'boneTexture', skeleton.boneTexture, textures);
						p_uniforms.setValue(_gl, 'boneTextureSize', skeleton.boneTextureSize);
					} else {
						console.warn('THREE.WebGLRenderer: SkinnedMesh can only be used with WebGL 2. With WebGL 1 OES_texture_float and vertex textures support is required.');
					}
				}
			}

			const morphAttributes = geometry.morphAttributes;

			if (morphAttributes.position !== undefined || morphAttributes.normal !== undefined || morphAttributes.color !== undefined && capabilities.isWebGL2 === true) {
				morphtargets.update(object, geometry, material, program);
			}

			if (refreshMaterial || materialProperties.receiveShadow !== object.receiveShadow) {
				materialProperties.receiveShadow = object.receiveShadow;
				p_uniforms.setValue(_gl, 'receiveShadow', object.receiveShadow);
			}

			if (refreshMaterial) {
				p_uniforms.setValue(_gl, 'toneMappingExposure', _this.toneMappingExposure);

				if (materialProperties.needsLights) {
					// the current material requires lighting info
					// note: all lighting uniforms are always set correctly
					// they simply reference the renderer's state for their
					// values
					//
					// use the current material's .needsUpdate flags to set
					// the GL state when required
					markUniformsLightsNeedsUpdate(m_uniforms, refreshLights);
				} // refresh uniforms common to several materials


				if (fog && material.fog === true) {
					materials.refreshFogUniforms(m_uniforms, fog);
				}

				materials.refreshMaterialUniforms(m_uniforms, material, _pixelRatio, _height, _transmissionRenderTarget);
				WebGLUniforms.upload(_gl, materialProperties.uniformsList, m_uniforms, textures);
			}

			if (material.isShaderMaterial && material.uniformsNeedUpdate === true) {
				WebGLUniforms.upload(_gl, materialProperties.uniformsList, m_uniforms, textures);
				material.uniformsNeedUpdate = false;
			}

			if (material.isSpriteMaterial) {
				p_uniforms.setValue(_gl, 'center', object.center);
			} // common matrices


			p_uniforms.setValue(_gl, 'modelViewMatrix', object.modelViewMatrix);
			p_uniforms.setValue(_gl, 'normalMatrix', object.normalMatrix);
			p_uniforms.setValue(_gl, 'modelMatrix', object.matrixWorld); // UBOs

			if (material.isShaderMaterial || material.isRawShaderMaterial) {
				const groups = material.uniformsGroups;

				for (let i = 0, l = groups.length; i < l; i++) {
					if (capabilities.isWebGL2) {
						const group = groups[i];
						uniformsGroups.update(group, program);
						uniformsGroups.bind(group, program);
					} else {
						console.warn('THREE.WebGLRenderer: Uniform Buffer Objects can only be used with WebGL 2.');
					}
				}
			}

			return program;
		} // If uniforms are marked as clean, they don't need to be loaded to the GPU.


		function markUniformsLightsNeedsUpdate(uniforms, value) {
			uniforms.ambientLightColor.needsUpdate = value;
			uniforms.lightProbe.needsUpdate = value;
			uniforms.directionalLights.needsUpdate = value;
			uniforms.directionalLightShadows.needsUpdate = value;
			uniforms.pointLights.needsUpdate = value;
			uniforms.pointLightShadows.needsUpdate = value;
			uniforms.spotLights.needsUpdate = value;
			uniforms.spotLightShadows.needsUpdate = value;
			uniforms.rectAreaLights.needsUpdate = value;
			uniforms.hemisphereLights.needsUpdate = value;
		}

		function materialNeedsLights(material) {
			return material.isMeshLambertMaterial || material.isMeshToonMaterial || material.isMeshPhongMaterial || material.isMeshStandardMaterial || material.isShadowMaterial || material.isShaderMaterial && material.lights === true;
		}

		this.getActiveCubeFace = function () {
			return _currentActiveCubeFace;
		};

		this.getActiveMipmapLevel = function () {
			return _currentActiveMipmapLevel;
		};

		this.getRenderTarget = function () {
			return _currentRenderTarget;
		};

		this.setRenderTargetTextures = function (renderTarget, colorTexture, depthTexture) {
			properties.get(renderTarget.texture).__webglTexture = colorTexture;
			properties.get(renderTarget.depthTexture).__webglTexture = depthTexture;
			const renderTargetProperties = properties.get(renderTarget);
			renderTargetProperties.__hasExternalTextures = true;

			if (renderTargetProperties.__hasExternalTextures) {
				renderTargetProperties.__autoAllocateDepthBuffer = depthTexture === undefined;

				if (!renderTargetProperties.__autoAllocateDepthBuffer) {
					// The multisample_render_to_texture extension doesn't work properly if there
					// are midframe flushes and an external depth buffer. Disable use of the extension.
					if (extensions.has('WEBGL_multisampled_render_to_texture') === true) {
						console.warn('THREE.WebGLRenderer: Render-to-texture extension was disabled because an external texture was provided');
						renderTargetProperties.__useRenderToTexture = false;
					}
				}
			}
		};

		this.setRenderTargetFramebuffer = function (renderTarget, defaultFramebuffer) {
			const renderTargetProperties = properties.get(renderTarget);
			renderTargetProperties.__webglFramebuffer = defaultFramebuffer;
			renderTargetProperties.__useDefaultFramebuffer = defaultFramebuffer === undefined;
		};

		this.setRenderTarget = function (renderTarget, activeCubeFace = 0, activeMipmapLevel = 0) {
			_currentRenderTarget = renderTarget;
			_currentActiveCubeFace = activeCubeFace;
			_currentActiveMipmapLevel = activeMipmapLevel;
			let useDefaultFramebuffer = true;

			if (renderTarget) {
				const renderTargetProperties = properties.get(renderTarget);

				if (renderTargetProperties.__useDefaultFramebuffer !== undefined) {
					// We need to make sure to rebind the framebuffer.
					state.bindFramebuffer(_gl.FRAMEBUFFER, null);
					useDefaultFramebuffer = false;
				} else if (renderTargetProperties.__webglFramebuffer === undefined) {
					textures.setupRenderTarget(renderTarget);
				} else if (renderTargetProperties.__hasExternalTextures) {
					// Color and depth texture must be rebound in order for the swapchain to update.
					textures.rebindTextures(renderTarget, properties.get(renderTarget.texture).__webglTexture, properties.get(renderTarget.depthTexture).__webglTexture);
				}
			}

			let framebuffer = null;
			let isCube = false;
			let isRenderTarget3D = false;

			if (renderTarget) {
				const texture = renderTarget.texture;

				if (texture.isData3DTexture || texture.isDataArrayTexture) {
					isRenderTarget3D = true;
				}

				const __webglFramebuffer = properties.get(renderTarget).__webglFramebuffer;

				if (renderTarget.isWebGLCubeRenderTarget) {
					framebuffer = __webglFramebuffer[activeCubeFace];
					isCube = true;
				} else if (capabilities.isWebGL2 && renderTarget.samples > 0 && textures.useMultisampledRTT(renderTarget) === false) {
					framebuffer = properties.get(renderTarget).__webglMultisampledFramebuffer;
				} else {
					framebuffer = __webglFramebuffer;
				}

				_currentViewport.copy(renderTarget.viewport);

				_currentScissor.copy(renderTarget.scissor);

				_currentScissorTest = renderTarget.scissorTest;
			} else {
				_currentViewport.copy(_viewport).multiplyScalar(_pixelRatio).floor();

				_currentScissor.copy(_scissor).multiplyScalar(_pixelRatio).floor();

				_currentScissorTest = _scissorTest;
			}

			const framebufferBound = state.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);

			if (framebufferBound && capabilities.drawBuffers && useDefaultFramebuffer) {
				state.drawBuffers(renderTarget, framebuffer);
			}

			state.viewport(_currentViewport);
			state.scissor(_currentScissor);
			state.setScissorTest(_currentScissorTest);

			if (isCube) {
				const textureProperties = properties.get(renderTarget.texture);

				_gl.framebufferTexture2D(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + activeCubeFace, textureProperties.__webglTexture, activeMipmapLevel);
			} else if (isRenderTarget3D) {
				const textureProperties = properties.get(renderTarget.texture);
				const layer = activeCubeFace || 0;

				_gl.framebufferTextureLayer(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, textureProperties.__webglTexture, activeMipmapLevel || 0, layer);
			}

			_currentMaterialId = -1; // reset current material to ensure correct uniform bindings
		};

		this.readRenderTargetPixels = function (renderTarget, x, y, width, height, buffer, activeCubeFaceIndex) {
			if (!(renderTarget && renderTarget.isWebGLRenderTarget)) {
				console.error('THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.');
				return;
			}

			let framebuffer = properties.get(renderTarget).__webglFramebuffer;

			if (renderTarget.isWebGLCubeRenderTarget && activeCubeFaceIndex !== undefined) {
				framebuffer = framebuffer[activeCubeFaceIndex];
			}

			if (framebuffer) {
				state.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);

				try {
					const texture = renderTarget.texture;
					const textureFormat = texture.format;
					const textureType = texture.type;

					if (textureFormat !== RGBAFormat && utils.convert(textureFormat) !== _gl.getParameter(_gl.IMPLEMENTATION_COLOR_READ_FORMAT)) {
						console.error('THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in RGBA or implementation defined format.');
						return;
					}

					const halfFloatSupportedByExt = textureType === HalfFloatType && (extensions.has('EXT_color_buffer_half_float') || capabilities.isWebGL2 && extensions.has('EXT_color_buffer_float'));

					if (textureType !== UnsignedByteType && utils.convert(textureType) !== _gl.getParameter(_gl.IMPLEMENTATION_COLOR_READ_TYPE) && // Edge and Chrome Mac < 52 (#9513)
					!(textureType === FloatType && (capabilities.isWebGL2 || extensions.has('OES_texture_float') || extensions.has('WEBGL_color_buffer_float'))) && // Chrome Mac >= 52 and Firefox
					!halfFloatSupportedByExt) {
						console.error('THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in UnsignedByteType or implementation defined type.');
						return;
					} // the following if statement ensures valid read requests (no out-of-bounds pixels, see #8604)


					if (x >= 0 && x <= renderTarget.width - width && y >= 0 && y <= renderTarget.height - height) {
						_gl.readPixels(x, y, width, height, utils.convert(textureFormat), utils.convert(textureType), buffer);
					}
				} finally {
					// restore framebuffer of current render target if necessary
					const framebuffer = _currentRenderTarget !== null ? properties.get(_currentRenderTarget).__webglFramebuffer : null;
					state.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);
				}
			}
		};

		this.copyFramebufferToTexture = function (position, texture, level = 0) {
			const levelScale = Math.pow(2, -level);
			const width = Math.floor(texture.image.width * levelScale);
			const height = Math.floor(texture.image.height * levelScale);
			textures.setTexture2D(texture, 0);

			_gl.copyTexSubImage2D(_gl.TEXTURE_2D, level, 0, 0, position.x, position.y, width, height);

			state.unbindTexture();
		};

		this.copyTextureToTexture = function (position, srcTexture, dstTexture, level = 0) {
			const width = srcTexture.image.width;
			const height = srcTexture.image.height;
			const glFormat = utils.convert(dstTexture.format);
			const glType = utils.convert(dstTexture.type);
			textures.setTexture2D(dstTexture, 0); // As another texture upload may have changed pixelStorei
			// parameters, make sure they are correct for the dstTexture

			_gl.pixelStorei(_gl.UNPACK_FLIP_Y_WEBGL, dstTexture.flipY);

			_gl.pixelStorei(_gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, dstTexture.premultiplyAlpha);

			_gl.pixelStorei(_gl.UNPACK_ALIGNMENT, dstTexture.unpackAlignment);

			if (srcTexture.isDataTexture) {
				_gl.texSubImage2D(_gl.TEXTURE_2D, level, position.x, position.y, width, height, glFormat, glType, srcTexture.image.data);
			} else {
				if (srcTexture.isCompressedTexture) {
					_gl.compressedTexSubImage2D(_gl.TEXTURE_2D, level, position.x, position.y, srcTexture.mipmaps[0].width, srcTexture.mipmaps[0].height, glFormat, srcTexture.mipmaps[0].data);
				} else {
					_gl.texSubImage2D(_gl.TEXTURE_2D, level, position.x, position.y, glFormat, glType, srcTexture.image);
				}
			} // Generate mipmaps only when copying level 0


			if (level === 0 && dstTexture.generateMipmaps) _gl.generateMipmap(_gl.TEXTURE_2D);
			state.unbindTexture();
		};

		this.copyTextureToTexture3D = function (sourceBox, position, srcTexture, dstTexture, level = 0) {
			if (_this.isWebGL1Renderer) {
				console.warn('THREE.WebGLRenderer.copyTextureToTexture3D: can only be used with WebGL2.');
				return;
			}

			const width = sourceBox.max.x - sourceBox.min.x + 1;
			const height = sourceBox.max.y - sourceBox.min.y + 1;
			const depth = sourceBox.max.z - sourceBox.min.z + 1;
			const glFormat = utils.convert(dstTexture.format);
			const glType = utils.convert(dstTexture.type);
			let glTarget;

			if (dstTexture.isData3DTexture) {
				textures.setTexture3D(dstTexture, 0);
				glTarget = _gl.TEXTURE_3D;
			} else if (dstTexture.isDataArrayTexture) {
				textures.setTexture2DArray(dstTexture, 0);
				glTarget = _gl.TEXTURE_2D_ARRAY;
			} else {
				console.warn('THREE.WebGLRenderer.copyTextureToTexture3D: only supports THREE.DataTexture3D and THREE.DataTexture2DArray.');
				return;
			}

			_gl.pixelStorei(_gl.UNPACK_FLIP_Y_WEBGL, dstTexture.flipY);

			_gl.pixelStorei(_gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, dstTexture.premultiplyAlpha);

			_gl.pixelStorei(_gl.UNPACK_ALIGNMENT, dstTexture.unpackAlignment);

			const unpackRowLen = _gl.getParameter(_gl.UNPACK_ROW_LENGTH);

			const unpackImageHeight = _gl.getParameter(_gl.UNPACK_IMAGE_HEIGHT);

			const unpackSkipPixels = _gl.getParameter(_gl.UNPACK_SKIP_PIXELS);

			const unpackSkipRows = _gl.getParameter(_gl.UNPACK_SKIP_ROWS);

			const unpackSkipImages = _gl.getParameter(_gl.UNPACK_SKIP_IMAGES);

			const image = srcTexture.isCompressedTexture ? srcTexture.mipmaps[0] : srcTexture.image;

			_gl.pixelStorei(_gl.UNPACK_ROW_LENGTH, image.width);

			_gl.pixelStorei(_gl.UNPACK_IMAGE_HEIGHT, image.height);

			_gl.pixelStorei(_gl.UNPACK_SKIP_PIXELS, sourceBox.min.x);

			_gl.pixelStorei(_gl.UNPACK_SKIP_ROWS, sourceBox.min.y);

			_gl.pixelStorei(_gl.UNPACK_SKIP_IMAGES, sourceBox.min.z);

			if (srcTexture.isDataTexture || srcTexture.isData3DTexture) {
				_gl.texSubImage3D(glTarget, level, position.x, position.y, position.z, width, height, depth, glFormat, glType, image.data);
			} else {
				if (srcTexture.isCompressedTexture) {
					console.warn('THREE.WebGLRenderer.copyTextureToTexture3D: untested support for compressed srcTexture.');

					_gl.compressedTexSubImage3D(glTarget, level, position.x, position.y, position.z, width, height, depth, glFormat, image.data);
				} else {
					_gl.texSubImage3D(glTarget, level, position.x, position.y, position.z, width, height, depth, glFormat, glType, image);
				}
			}

			_gl.pixelStorei(_gl.UNPACK_ROW_LENGTH, unpackRowLen);

			_gl.pixelStorei(_gl.UNPACK_IMAGE_HEIGHT, unpackImageHeight);

			_gl.pixelStorei(_gl.UNPACK_SKIP_PIXELS, unpackSkipPixels);

			_gl.pixelStorei(_gl.UNPACK_SKIP_ROWS, unpackSkipRows);

			_gl.pixelStorei(_gl.UNPACK_SKIP_IMAGES, unpackSkipImages); // Generate mipmaps only when copying level 0


			if (level === 0 && dstTexture.generateMipmaps) _gl.generateMipmap(glTarget);
			state.unbindTexture();
		};

		this.initTexture = function (texture) {
			if (texture.isCubeTexture) {
				textures.setTextureCube(texture, 0);
			} else if (texture.isData3DTexture) {
				textures.setTexture3D(texture, 0);
			} else if (texture.isDataArrayTexture) {
				textures.setTexture2DArray(texture, 0);
			} else {
				textures.setTexture2D(texture, 0);
			}

			state.unbindTexture();
		};

		this.resetState = function () {
			_currentActiveCubeFace = 0;
			_currentActiveMipmapLevel = 0;
			_currentRenderTarget = null;
			state.reset();
			bindingStates.reset();
		};

		if (typeof __THREE_DEVTOOLS__ !== 'undefined') {
			__THREE_DEVTOOLS__.dispatchEvent(new CustomEvent('observe', {
				detail: this
			}));
		}
	}

	class WebGL1Renderer extends WebGLRenderer {}

	WebGL1Renderer.prototype.isWebGL1Renderer = true;

	class FogExp2 {
		constructor(color, density = 0.00025) {
			this.isFogExp2 = true;
			this.name = '';
			this.color = new Color(color);
			this.density = density;
		}

		clone() {
			return new FogExp2(this.color, this.density);
		}

		toJSON() {
			return {
				type: 'FogExp2',
				color: this.color.getHex(),
				density: this.density
			};
		}

	}

	class Fog {
		constructor(color, near = 1, far = 1000) {
			this.isFog = true;
			this.name = '';
			this.color = new Color(color);
			this.near = near;
			this.far = far;
		}

		clone() {
			return new Fog(this.color, this.near, this.far);
		}

		toJSON() {
			return {
				type: 'Fog',
				color: this.color.getHex(),
				near: this.near,
				far: this.far
			};
		}

	}

	class Scene extends Object3D {
		constructor() {
			super();
			this.isScene = true;
			this.type = 'Scene';
			this.background = null;
			this.environment = null;
			this.fog = null;
			this.overrideMaterial = null;
			this.autoUpdate = true; // checked by the renderer

			if (typeof __THREE_DEVTOOLS__ !== 'undefined') {
				__THREE_DEVTOOLS__.dispatchEvent(new CustomEvent('observe', {
					detail: this
				}));
			}
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			if (source.background !== null) this.background = source.background.clone();
			if (source.environment !== null) this.environment = source.environment.clone();
			if (source.fog !== null) this.fog = source.fog.clone();
			if (source.overrideMaterial !== null) this.overrideMaterial = source.overrideMaterial.clone();
			this.autoUpdate = source.autoUpdate;
			this.matrixAutoUpdate = source.matrixAutoUpdate;
			return this;
		}

		toJSON(meta) {
			const data = super.toJSON(meta);
			if (this.fog !== null) data.object.fog = this.fog.toJSON();
			return data;
		}

	}

	class InterleavedBuffer {
		constructor(array, stride) {
			this.isInterleavedBuffer = true;
			this.array = array;
			this.stride = stride;
			this.count = array !== undefined ? array.length / stride : 0;
			this.usage = StaticDrawUsage;
			this.updateRange = {
				offset: 0,
				count: -1
			};
			this.version = 0;
			this.uuid = generateUUID();
		}

		onUploadCallback() {}

		set needsUpdate(value) {
			if (value === true) this.version++;
		}

		setUsage(value) {
			this.usage = value;
			return this;
		}

		copy(source) {
			this.array = new source.array.constructor(source.array);
			this.count = source.count;
			this.stride = source.stride;
			this.usage = source.usage;
			return this;
		}

		copyAt(index1, attribute, index2) {
			index1 *= this.stride;
			index2 *= attribute.stride;

			for (let i = 0, l = this.stride; i < l; i++) {
				this.array[index1 + i] = attribute.array[index2 + i];
			}

			return this;
		}

		set(value, offset = 0) {
			this.array.set(value, offset);
			return this;
		}

		clone(data) {
			if (data.arrayBuffers === undefined) {
				data.arrayBuffers = {};
			}

			if (this.array.buffer._uuid === undefined) {
				this.array.buffer._uuid = generateUUID();
			}

			if (data.arrayBuffers[this.array.buffer._uuid] === undefined) {
				data.arrayBuffers[this.array.buffer._uuid] = this.array.slice(0).buffer;
			}

			const array = new this.array.constructor(data.arrayBuffers[this.array.buffer._uuid]);
			const ib = new this.constructor(array, this.stride);
			ib.setUsage(this.usage);
			return ib;
		}

		onUpload(callback) {
			this.onUploadCallback = callback;
			return this;
		}

		toJSON(data) {
			if (data.arrayBuffers === undefined) {
				data.arrayBuffers = {};
			} // generate UUID for array buffer if necessary


			if (this.array.buffer._uuid === undefined) {
				this.array.buffer._uuid = generateUUID();
			}

			if (data.arrayBuffers[this.array.buffer._uuid] === undefined) {
				data.arrayBuffers[this.array.buffer._uuid] = Array.from(new Uint32Array(this.array.buffer));
			} //


			return {
				uuid: this.uuid,
				buffer: this.array.buffer._uuid,
				type: this.array.constructor.name,
				stride: this.stride
			};
		}

	}

	const _vector$6 = /*@__PURE__*/new Vector3();

	class InterleavedBufferAttribute {
		constructor(interleavedBuffer, itemSize, offset, normalized = false) {
			this.isInterleavedBufferAttribute = true;
			this.name = '';
			this.data = interleavedBuffer;
			this.itemSize = itemSize;
			this.offset = offset;
			this.normalized = normalized === true;
		}

		get count() {
			return this.data.count;
		}

		get array() {
			return this.data.array;
		}

		set needsUpdate(value) {
			this.data.needsUpdate = value;
		}

		applyMatrix4(m) {
			for (let i = 0, l = this.data.count; i < l; i++) {
				_vector$6.fromBufferAttribute(this, i);

				_vector$6.applyMatrix4(m);

				this.setXYZ(i, _vector$6.x, _vector$6.y, _vector$6.z);
			}

			return this;
		}

		applyNormalMatrix(m) {
			for (let i = 0, l = this.count; i < l; i++) {
				_vector$6.fromBufferAttribute(this, i);

				_vector$6.applyNormalMatrix(m);

				this.setXYZ(i, _vector$6.x, _vector$6.y, _vector$6.z);
			}

			return this;
		}

		transformDirection(m) {
			for (let i = 0, l = this.count; i < l; i++) {
				_vector$6.fromBufferAttribute(this, i);

				_vector$6.transformDirection(m);

				this.setXYZ(i, _vector$6.x, _vector$6.y, _vector$6.z);
			}

			return this;
		}

		setX(index, x) {
			this.data.array[index * this.data.stride + this.offset] = x;
			return this;
		}

		setY(index, y) {
			this.data.array[index * this.data.stride + this.offset + 1] = y;
			return this;
		}

		setZ(index, z) {
			this.data.array[index * this.data.stride + this.offset + 2] = z;
			return this;
		}

		setW(index, w) {
			this.data.array[index * this.data.stride + this.offset + 3] = w;
			return this;
		}

		getX(index) {
			return this.data.array[index * this.data.stride + this.offset];
		}

		getY(index) {
			return this.data.array[index * this.data.stride + this.offset + 1];
		}

		getZ(index) {
			return this.data.array[index * this.data.stride + this.offset + 2];
		}

		getW(index) {
			return this.data.array[index * this.data.stride + this.offset + 3];
		}

		setXY(index, x, y) {
			index = index * this.data.stride + this.offset;
			this.data.array[index + 0] = x;
			this.data.array[index + 1] = y;
			return this;
		}

		setXYZ(index, x, y, z) {
			index = index * this.data.stride + this.offset;
			this.data.array[index + 0] = x;
			this.data.array[index + 1] = y;
			this.data.array[index + 2] = z;
			return this;
		}

		setXYZW(index, x, y, z, w) {
			index = index * this.data.stride + this.offset;
			this.data.array[index + 0] = x;
			this.data.array[index + 1] = y;
			this.data.array[index + 2] = z;
			this.data.array[index + 3] = w;
			return this;
		}

		clone(data) {
			if (data === undefined) {
				console.log('THREE.InterleavedBufferAttribute.clone(): Cloning an interleaved buffer attribute will deinterleave buffer data.');
				const array = [];

				for (let i = 0; i < this.count; i++) {
					const index = i * this.data.stride + this.offset;

					for (let j = 0; j < this.itemSize; j++) {
						array.push(this.data.array[index + j]);
					}
				}

				return new BufferAttribute(new this.array.constructor(array), this.itemSize, this.normalized);
			} else {
				if (data.interleavedBuffers === undefined) {
					data.interleavedBuffers = {};
				}

				if (data.interleavedBuffers[this.data.uuid] === undefined) {
					data.interleavedBuffers[this.data.uuid] = this.data.clone(data);
				}

				return new InterleavedBufferAttribute(data.interleavedBuffers[this.data.uuid], this.itemSize, this.offset, this.normalized);
			}
		}

		toJSON(data) {
			if (data === undefined) {
				console.log('THREE.InterleavedBufferAttribute.toJSON(): Serializing an interleaved buffer attribute will deinterleave buffer data.');
				const array = [];

				for (let i = 0; i < this.count; i++) {
					const index = i * this.data.stride + this.offset;

					for (let j = 0; j < this.itemSize; j++) {
						array.push(this.data.array[index + j]);
					}
				} // deinterleave data and save it as an ordinary buffer attribute for now


				return {
					itemSize: this.itemSize,
					type: this.array.constructor.name,
					array: array,
					normalized: this.normalized
				};
			} else {
				// save as true interleaved attribtue
				if (data.interleavedBuffers === undefined) {
					data.interleavedBuffers = {};
				}

				if (data.interleavedBuffers[this.data.uuid] === undefined) {
					data.interleavedBuffers[this.data.uuid] = this.data.toJSON(data);
				}

				return {
					isInterleavedBufferAttribute: true,
					itemSize: this.itemSize,
					data: this.data.uuid,
					offset: this.offset,
					normalized: this.normalized
				};
			}
		}

	}

	class SpriteMaterial extends Material {
		constructor(parameters) {
			super();
			this.isSpriteMaterial = true;
			this.type = 'SpriteMaterial';
			this.color = new Color(0xffffff);
			this.map = null;
			this.alphaMap = null;
			this.rotation = 0;
			this.sizeAttenuation = true;
			this.transparent = true;
			this.fog = true;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.color.copy(source.color);
			this.map = source.map;
			this.alphaMap = source.alphaMap;
			this.rotation = source.rotation;
			this.sizeAttenuation = source.sizeAttenuation;
			this.fog = source.fog;
			return this;
		}

	}

	let _geometry;

	const _intersectPoint = /*@__PURE__*/new Vector3();

	const _worldScale = /*@__PURE__*/new Vector3();

	const _mvPosition = /*@__PURE__*/new Vector3();

	const _alignedPosition = /*@__PURE__*/new Vector2();

	const _rotatedPosition = /*@__PURE__*/new Vector2();

	const _viewWorldMatrix = /*@__PURE__*/new Matrix4();

	const _vA = /*@__PURE__*/new Vector3();

	const _vB = /*@__PURE__*/new Vector3();

	const _vC = /*@__PURE__*/new Vector3();

	const _uvA = /*@__PURE__*/new Vector2();

	const _uvB = /*@__PURE__*/new Vector2();

	const _uvC = /*@__PURE__*/new Vector2();

	class Sprite extends Object3D {
		constructor(material) {
			super();
			this.isSprite = true;
			this.type = 'Sprite';

			if (_geometry === undefined) {
				_geometry = new BufferGeometry();
				const float32Array = new Float32Array([-0.5, -0.5, 0, 0, 0, 0.5, -0.5, 0, 1, 0, 0.5, 0.5, 0, 1, 1, -0.5, 0.5, 0, 0, 1]);
				const interleavedBuffer = new InterleavedBuffer(float32Array, 5);

				_geometry.setIndex([0, 1, 2, 0, 2, 3]);

				_geometry.setAttribute('position', new InterleavedBufferAttribute(interleavedBuffer, 3, 0, false));

				_geometry.setAttribute('uv', new InterleavedBufferAttribute(interleavedBuffer, 2, 3, false));
			}

			this.geometry = _geometry;
			this.material = material !== undefined ? material : new SpriteMaterial();
			this.center = new Vector2(0.5, 0.5);
		}

		raycast(raycaster, intersects) {
			if (raycaster.camera === null) {
				console.error('THREE.Sprite: "Raycaster.camera" needs to be set in order to raycast against sprites.');
			}

			_worldScale.setFromMatrixScale(this.matrixWorld);

			_viewWorldMatrix.copy(raycaster.camera.matrixWorld);

			this.modelViewMatrix.multiplyMatrices(raycaster.camera.matrixWorldInverse, this.matrixWorld);

			_mvPosition.setFromMatrixPosition(this.modelViewMatrix);

			if (raycaster.camera.isPerspectiveCamera && this.material.sizeAttenuation === false) {
				_worldScale.multiplyScalar(-_mvPosition.z);
			}

			const rotation = this.material.rotation;
			let sin, cos;

			if (rotation !== 0) {
				cos = Math.cos(rotation);
				sin = Math.sin(rotation);
			}

			const center = this.center;
			transformVertex(_vA.set(-0.5, -0.5, 0), _mvPosition, center, _worldScale, sin, cos);
			transformVertex(_vB.set(0.5, -0.5, 0), _mvPosition, center, _worldScale, sin, cos);
			transformVertex(_vC.set(0.5, 0.5, 0), _mvPosition, center, _worldScale, sin, cos);

			_uvA.set(0, 0);

			_uvB.set(1, 0);

			_uvC.set(1, 1); // check first triangle


			let intersect = raycaster.ray.intersectTriangle(_vA, _vB, _vC, false, _intersectPoint);

			if (intersect === null) {
				// check second triangle
				transformVertex(_vB.set(-0.5, 0.5, 0), _mvPosition, center, _worldScale, sin, cos);

				_uvB.set(0, 1);

				intersect = raycaster.ray.intersectTriangle(_vA, _vC, _vB, false, _intersectPoint);

				if (intersect === null) {
					return;
				}
			}

			const distance = raycaster.ray.origin.distanceTo(_intersectPoint);
			if (distance < raycaster.near || distance > raycaster.far) return;
			intersects.push({
				distance: distance,
				point: _intersectPoint.clone(),
				uv: Triangle.getUV(_intersectPoint, _vA, _vB, _vC, _uvA, _uvB, _uvC, new Vector2()),
				face: null,
				object: this
			});
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			if (source.center !== undefined) this.center.copy(source.center);
			this.material = source.material;
			return this;
		}

	}

	function transformVertex(vertexPosition, mvPosition, center, scale, sin, cos) {
		// compute position in camera space
		_alignedPosition.subVectors(vertexPosition, center).addScalar(0.5).multiply(scale); // to check if rotation is not zero


		if (sin !== undefined) {
			_rotatedPosition.x = cos * _alignedPosition.x - sin * _alignedPosition.y;
			_rotatedPosition.y = sin * _alignedPosition.x + cos * _alignedPosition.y;
		} else {
			_rotatedPosition.copy(_alignedPosition);
		}

		vertexPosition.copy(mvPosition);
		vertexPosition.x += _rotatedPosition.x;
		vertexPosition.y += _rotatedPosition.y; // transform to world space

		vertexPosition.applyMatrix4(_viewWorldMatrix);
	}

	const _v1$2 = /*@__PURE__*/new Vector3();

	const _v2$1 = /*@__PURE__*/new Vector3();

	class LOD extends Object3D {
		constructor() {
			super();
			this._currentLevel = 0;
			this.type = 'LOD';
			Object.defineProperties(this, {
				levels: {
					enumerable: true,
					value: []
				},
				isLOD: {
					value: true
				}
			});
			this.autoUpdate = true;
		}

		copy(source) {
			super.copy(source, false);
			const levels = source.levels;

			for (let i = 0, l = levels.length; i < l; i++) {
				const level = levels[i];
				this.addLevel(level.object.clone(), level.distance);
			}

			this.autoUpdate = source.autoUpdate;
			return this;
		}

		addLevel(object, distance = 0) {
			distance = Math.abs(distance);
			const levels = this.levels;
			let l;

			for (l = 0; l < levels.length; l++) {
				if (distance < levels[l].distance) {
					break;
				}
			}

			levels.splice(l, 0, {
				distance: distance,
				object: object
			});
			this.add(object);
			return this;
		}

		getCurrentLevel() {
			return this._currentLevel;
		}

		getObjectForDistance(distance) {
			const levels = this.levels;

			if (levels.length > 0) {
				let i, l;

				for (i = 1, l = levels.length; i < l; i++) {
					if (distance < levels[i].distance) {
						break;
					}
				}

				return levels[i - 1].object;
			}

			return null;
		}

		raycast(raycaster, intersects) {
			const levels = this.levels;

			if (levels.length > 0) {
				_v1$2.setFromMatrixPosition(this.matrixWorld);

				const distance = raycaster.ray.origin.distanceTo(_v1$2);
				this.getObjectForDistance(distance).raycast(raycaster, intersects);
			}
		}

		update(camera) {
			const levels = this.levels;

			if (levels.length > 1) {
				_v1$2.setFromMatrixPosition(camera.matrixWorld);

				_v2$1.setFromMatrixPosition(this.matrixWorld);

				const distance = _v1$2.distanceTo(_v2$1) / camera.zoom;
				levels[0].object.visible = true;
				let i, l;

				for (i = 1, l = levels.length; i < l; i++) {
					if (distance >= levels[i].distance) {
						levels[i - 1].object.visible = false;
						levels[i].object.visible = true;
					} else {
						break;
					}
				}

				this._currentLevel = i - 1;

				for (; i < l; i++) {
					levels[i].object.visible = false;
				}
			}
		}

		toJSON(meta) {
			const data = super.toJSON(meta);
			if (this.autoUpdate === false) data.object.autoUpdate = false;
			data.object.levels = [];
			const levels = this.levels;

			for (let i = 0, l = levels.length; i < l; i++) {
				const level = levels[i];
				data.object.levels.push({
					object: level.object.uuid,
					distance: level.distance
				});
			}

			return data;
		}

	}

	const _basePosition = /*@__PURE__*/new Vector3();

	const _skinIndex = /*@__PURE__*/new Vector4();

	const _skinWeight = /*@__PURE__*/new Vector4();

	const _vector$5 = /*@__PURE__*/new Vector3();

	const _matrix = /*@__PURE__*/new Matrix4();

	class SkinnedMesh extends Mesh {
		constructor(geometry, material) {
			super(geometry, material);
			this.isSkinnedMesh = true;
			this.type = 'SkinnedMesh';
			this.bindMode = 'attached';
			this.bindMatrix = new Matrix4();
			this.bindMatrixInverse = new Matrix4();
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.bindMode = source.bindMode;
			this.bindMatrix.copy(source.bindMatrix);
			this.bindMatrixInverse.copy(source.bindMatrixInverse);
			this.skeleton = source.skeleton;
			return this;
		}

		bind(skeleton, bindMatrix) {
			this.skeleton = skeleton;

			if (bindMatrix === undefined) {
				this.updateMatrixWorld(true);
				this.skeleton.calculateInverses();
				bindMatrix = this.matrixWorld;
			}

			this.bindMatrix.copy(bindMatrix);
			this.bindMatrixInverse.copy(bindMatrix).invert();
		}

		pose() {
			this.skeleton.pose();
		}

		normalizeSkinWeights() {
			const vector = new Vector4();
			const skinWeight = this.geometry.attributes.skinWeight;

			for (let i = 0, l = skinWeight.count; i < l; i++) {
				vector.fromBufferAttribute(skinWeight, i);
				const scale = 1.0 / vector.manhattanLength();

				if (scale !== Infinity) {
					vector.multiplyScalar(scale);
				} else {
					vector.set(1, 0, 0, 0); // do something reasonable
				}

				skinWeight.setXYZW(i, vector.x, vector.y, vector.z, vector.w);
			}
		}

		updateMatrixWorld(force) {
			super.updateMatrixWorld(force);

			if (this.bindMode === 'attached') {
				this.bindMatrixInverse.copy(this.matrixWorld).invert();
			} else if (this.bindMode === 'detached') {
				this.bindMatrixInverse.copy(this.bindMatrix).invert();
			} else {
				console.warn('THREE.SkinnedMesh: Unrecognized bindMode: ' + this.bindMode);
			}
		}

		boneTransform(index, target) {
			const skeleton = this.skeleton;
			const geometry = this.geometry;

			_skinIndex.fromBufferAttribute(geometry.attributes.skinIndex, index);

			_skinWeight.fromBufferAttribute(geometry.attributes.skinWeight, index);

			_basePosition.copy(target).applyMatrix4(this.bindMatrix);

			target.set(0, 0, 0);

			for (let i = 0; i < 4; i++) {
				const weight = _skinWeight.getComponent(i);

				if (weight !== 0) {
					const boneIndex = _skinIndex.getComponent(i);

					_matrix.multiplyMatrices(skeleton.bones[boneIndex].matrixWorld, skeleton.boneInverses[boneIndex]);

					target.addScaledVector(_vector$5.copy(_basePosition).applyMatrix4(_matrix), weight);
				}
			}

			return target.applyMatrix4(this.bindMatrixInverse);
		}

	}

	class Bone extends Object3D {
		constructor() {
			super();
			this.isBone = true;
			this.type = 'Bone';
		}

	}

	class DataTexture extends Texture {
		constructor(data = null, width = 1, height = 1, format, type, mapping, wrapS, wrapT, magFilter = NearestFilter, minFilter = NearestFilter, anisotropy, encoding) {
			super(null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding);
			this.isDataTexture = true;
			this.image = {
				data: data,
				width: width,
				height: height
			};
			this.generateMipmaps = false;
			this.flipY = false;
			this.unpackAlignment = 1;
		}

	}

	const _offsetMatrix = /*@__PURE__*/new Matrix4();

	const _identityMatrix = /*@__PURE__*/new Matrix4();

	class Skeleton {
		constructor(bones = [], boneInverses = []) {
			this.uuid = generateUUID();
			this.bones = bones.slice(0);
			this.boneInverses = boneInverses;
			this.boneMatrices = null;
			this.boneTexture = null;
			this.boneTextureSize = 0;
			this.frame = -1;
			this.init();
		}

		init() {
			const bones = this.bones;
			const boneInverses = this.boneInverses;
			this.boneMatrices = new Float32Array(bones.length * 16); // calculate inverse bone matrices if necessary

			if (boneInverses.length === 0) {
				this.calculateInverses();
			} else {
				// handle special case
				if (bones.length !== boneInverses.length) {
					console.warn('THREE.Skeleton: Number of inverse bone matrices does not match amount of bones.');
					this.boneInverses = [];

					for (let i = 0, il = this.bones.length; i < il; i++) {
						this.boneInverses.push(new Matrix4());
					}
				}
			}
		}

		calculateInverses() {
			this.boneInverses.length = 0;

			for (let i = 0, il = this.bones.length; i < il; i++) {
				const inverse = new Matrix4();

				if (this.bones[i]) {
					inverse.copy(this.bones[i].matrixWorld).invert();
				}

				this.boneInverses.push(inverse);
			}
		}

		pose() {
			// recover the bind-time world matrices
			for (let i = 0, il = this.bones.length; i < il; i++) {
				const bone = this.bones[i];

				if (bone) {
					bone.matrixWorld.copy(this.boneInverses[i]).invert();
				}
			} // compute the local matrices, positions, rotations and scales


			for (let i = 0, il = this.bones.length; i < il; i++) {
				const bone = this.bones[i];

				if (bone) {
					if (bone.parent && bone.parent.isBone) {
						bone.matrix.copy(bone.parent.matrixWorld).invert();
						bone.matrix.multiply(bone.matrixWorld);
					} else {
						bone.matrix.copy(bone.matrixWorld);
					}

					bone.matrix.decompose(bone.position, bone.quaternion, bone.scale);
				}
			}
		}

		update() {
			const bones = this.bones;
			const boneInverses = this.boneInverses;
			const boneMatrices = this.boneMatrices;
			const boneTexture = this.boneTexture; // flatten bone matrices to array

			for (let i = 0, il = bones.length; i < il; i++) {
				// compute the offset between the current and the original transform
				const matrix = bones[i] ? bones[i].matrixWorld : _identityMatrix;

				_offsetMatrix.multiplyMatrices(matrix, boneInverses[i]);

				_offsetMatrix.toArray(boneMatrices, i * 16);
			}

			if (boneTexture !== null) {
				boneTexture.needsUpdate = true;
			}
		}

		clone() {
			return new Skeleton(this.bones, this.boneInverses);
		}

		computeBoneTexture() {
			// layout (1 matrix = 4 pixels)
			//			RGBA RGBA RGBA RGBA (=> column1, column2, column3, column4)
			//	with	8x8	pixel texture max	 16 bones * 4 pixels =	(8 * 8)
			//			 16x16 pixel texture max	 64 bones * 4 pixels = (16 * 16)
			//			 32x32 pixel texture max	256 bones * 4 pixels = (32 * 32)
			//			 64x64 pixel texture max 1024 bones * 4 pixels = (64 * 64)
			let size = Math.sqrt(this.bones.length * 4); // 4 pixels needed for 1 matrix

			size = ceilPowerOfTwo(size);
			size = Math.max(size, 4);
			const boneMatrices = new Float32Array(size * size * 4); // 4 floats per RGBA pixel

			boneMatrices.set(this.boneMatrices); // copy current values

			const boneTexture = new DataTexture(boneMatrices, size, size, RGBAFormat, FloatType);
			boneTexture.needsUpdate = true;
			this.boneMatrices = boneMatrices;
			this.boneTexture = boneTexture;
			this.boneTextureSize = size;
			return this;
		}

		getBoneByName(name) {
			for (let i = 0, il = this.bones.length; i < il; i++) {
				const bone = this.bones[i];

				if (bone.name === name) {
					return bone;
				}
			}

			return undefined;
		}

		dispose() {
			if (this.boneTexture !== null) {
				this.boneTexture.dispose();
				this.boneTexture = null;
			}
		}

		fromJSON(json, bones) {
			this.uuid = json.uuid;

			for (let i = 0, l = json.bones.length; i < l; i++) {
				const uuid = json.bones[i];
				let bone = bones[uuid];

				if (bone === undefined) {
					console.warn('THREE.Skeleton: No bone found with UUID:', uuid);
					bone = new Bone();
				}

				this.bones.push(bone);
				this.boneInverses.push(new Matrix4().fromArray(json.boneInverses[i]));
			}

			this.init();
			return this;
		}

		toJSON() {
			const data = {
				metadata: {
					version: 4.5,
					type: 'Skeleton',
					generator: 'Skeleton.toJSON'
				},
				bones: [],
				boneInverses: []
			};
			data.uuid = this.uuid;
			const bones = this.bones;
			const boneInverses = this.boneInverses;

			for (let i = 0, l = bones.length; i < l; i++) {
				const bone = bones[i];
				data.bones.push(bone.uuid);
				const boneInverse = boneInverses[i];
				data.boneInverses.push(boneInverse.toArray());
			}

			return data;
		}

	}

	class InstancedBufferAttribute extends BufferAttribute {
		constructor(array, itemSize, normalized, meshPerAttribute = 1) {
			if (typeof normalized === 'number') {
				meshPerAttribute = normalized;
				normalized = false;
				console.error('THREE.InstancedBufferAttribute: The constructor now expects normalized as the third argument.');
			}

			super(array, itemSize, normalized);
			this.isInstancedBufferAttribute = true;
			this.meshPerAttribute = meshPerAttribute;
		}

		copy(source) {
			super.copy(source);
			this.meshPerAttribute = source.meshPerAttribute;
			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.meshPerAttribute = this.meshPerAttribute;
			data.isInstancedBufferAttribute = true;
			return data;
		}

	}

	const _instanceLocalMatrix = /*@__PURE__*/new Matrix4();

	const _instanceWorldMatrix = /*@__PURE__*/new Matrix4();

	const _instanceIntersects = [];

	const _mesh = /*@__PURE__*/new Mesh();

	class InstancedMesh extends Mesh {
		constructor(geometry, material, count) {
			super(geometry, material);
			this.isInstancedMesh = true;
			this.instanceMatrix = new InstancedBufferAttribute(new Float32Array(count * 16), 16);
			this.instanceColor = null;
			this.count = count;
			this.frustumCulled = false;
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.instanceMatrix.copy(source.instanceMatrix);
			if (source.instanceColor !== null) this.instanceColor = source.instanceColor.clone();
			this.count = source.count;
			return this;
		}

		getColorAt(index, color) {
			color.fromArray(this.instanceColor.array, index * 3);
		}

		getMatrixAt(index, matrix) {
			matrix.fromArray(this.instanceMatrix.array, index * 16);
		}

		raycast(raycaster, intersects) {
			const matrixWorld = this.matrixWorld;
			const raycastTimes = this.count;
			_mesh.geometry = this.geometry;
			_mesh.material = this.material;
			if (_mesh.material === undefined) return;

			for (let instanceId = 0; instanceId < raycastTimes; instanceId++) {
				// calculate the world matrix for each instance
				this.getMatrixAt(instanceId, _instanceLocalMatrix);

				_instanceWorldMatrix.multiplyMatrices(matrixWorld, _instanceLocalMatrix); // the mesh represents this single instance


				_mesh.matrixWorld = _instanceWorldMatrix;

				_mesh.raycast(raycaster, _instanceIntersects); // process the result of raycast


				for (let i = 0, l = _instanceIntersects.length; i < l; i++) {
					const intersect = _instanceIntersects[i];
					intersect.instanceId = instanceId;
					intersect.object = this;
					intersects.push(intersect);
				}

				_instanceIntersects.length = 0;
			}
		}

		setColorAt(index, color) {
			if (this.instanceColor === null) {
				this.instanceColor = new InstancedBufferAttribute(new Float32Array(this.instanceMatrix.count * 3), 3);
			}

			color.toArray(this.instanceColor.array, index * 3);
		}

		setMatrixAt(index, matrix) {
			matrix.toArray(this.instanceMatrix.array, index * 16);
		}

		updateMorphTargets() {}

		dispose() {
			this.dispatchEvent({
				type: 'dispose'
			});
		}

	}

	class LineBasicMaterial extends Material {
		constructor(parameters) {
			super();
			this.isLineBasicMaterial = true;
			this.type = 'LineBasicMaterial';
			this.color = new Color(0xffffff);
			this.linewidth = 1;
			this.linecap = 'round';
			this.linejoin = 'round';
			this.fog = true;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.color.copy(source.color);
			this.linewidth = source.linewidth;
			this.linecap = source.linecap;
			this.linejoin = source.linejoin;
			this.fog = source.fog;
			return this;
		}

	}

	const _start$1 = /*@__PURE__*/new Vector3();

	const _end$1 = /*@__PURE__*/new Vector3();

	const _inverseMatrix$1 = /*@__PURE__*/new Matrix4();

	const _ray$1 = /*@__PURE__*/new Ray();

	const _sphere$1 = /*@__PURE__*/new Sphere();

	class Line extends Object3D {
		constructor(geometry = new BufferGeometry(), material = new LineBasicMaterial()) {
			super();
			this.isLine = true;
			this.type = 'Line';
			this.geometry = geometry;
			this.material = material;
			this.updateMorphTargets();
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.material = source.material;
			this.geometry = source.geometry;
			return this;
		}

		computeLineDistances() {
			const geometry = this.geometry; // we assume non-indexed geometry

			if (geometry.index === null) {
				const positionAttribute = geometry.attributes.position;
				const lineDistances = [0];

				for (let i = 1, l = positionAttribute.count; i < l; i++) {
					_start$1.fromBufferAttribute(positionAttribute, i - 1);

					_end$1.fromBufferAttribute(positionAttribute, i);

					lineDistances[i] = lineDistances[i - 1];
					lineDistances[i] += _start$1.distanceTo(_end$1);
				}

				geometry.setAttribute('lineDistance', new Float32BufferAttribute(lineDistances, 1));
			} else {
				console.warn('THREE.Line.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.');
			}

			return this;
		}

		raycast(raycaster, intersects) {
			const geometry = this.geometry;
			const matrixWorld = this.matrixWorld;
			const threshold = raycaster.params.Line.threshold;
			const drawRange = geometry.drawRange; // Checking boundingSphere distance to ray

			if (geometry.boundingSphere === null) geometry.computeBoundingSphere();

			_sphere$1.copy(geometry.boundingSphere);

			_sphere$1.applyMatrix4(matrixWorld);

			_sphere$1.radius += threshold;
			if (raycaster.ray.intersectsSphere(_sphere$1) === false) return; //

			_inverseMatrix$1.copy(matrixWorld).invert();

			_ray$1.copy(raycaster.ray).applyMatrix4(_inverseMatrix$1);

			const localThreshold = threshold / ((this.scale.x + this.scale.y + this.scale.z) / 3);
			const localThresholdSq = localThreshold * localThreshold;
			const vStart = new Vector3();
			const vEnd = new Vector3();
			const interSegment = new Vector3();
			const interRay = new Vector3();
			const step = this.isLineSegments ? 2 : 1;
			const index = geometry.index;
			const attributes = geometry.attributes;
			const positionAttribute = attributes.position;

			if (index !== null) {
				const start = Math.max(0, drawRange.start);
				const end = Math.min(index.count, drawRange.start + drawRange.count);

				for (let i = start, l = end - 1; i < l; i += step) {
					const a = index.getX(i);
					const b = index.getX(i + 1);
					vStart.fromBufferAttribute(positionAttribute, a);
					vEnd.fromBufferAttribute(positionAttribute, b);

					const distSq = _ray$1.distanceSqToSegment(vStart, vEnd, interRay, interSegment);

					if (distSq > localThresholdSq) continue;
					interRay.applyMatrix4(this.matrixWorld); //Move back to world space for distance calculation

					const distance = raycaster.ray.origin.distanceTo(interRay);
					if (distance < raycaster.near || distance > raycaster.far) continue;
					intersects.push({
						distance: distance,
						// What do we want? intersection point on the ray or on the segment??
						// point: raycaster.ray.at( distance ),
						point: interSegment.clone().applyMatrix4(this.matrixWorld),
						index: i,
						face: null,
						faceIndex: null,
						object: this
					});
				}
			} else {
				const start = Math.max(0, drawRange.start);
				const end = Math.min(positionAttribute.count, drawRange.start + drawRange.count);

				for (let i = start, l = end - 1; i < l; i += step) {
					vStart.fromBufferAttribute(positionAttribute, i);
					vEnd.fromBufferAttribute(positionAttribute, i + 1);

					const distSq = _ray$1.distanceSqToSegment(vStart, vEnd, interRay, interSegment);

					if (distSq > localThresholdSq) continue;
					interRay.applyMatrix4(this.matrixWorld); //Move back to world space for distance calculation

					const distance = raycaster.ray.origin.distanceTo(interRay);
					if (distance < raycaster.near || distance > raycaster.far) continue;
					intersects.push({
						distance: distance,
						// What do we want? intersection point on the ray or on the segment??
						// point: raycaster.ray.at( distance ),
						point: interSegment.clone().applyMatrix4(this.matrixWorld),
						index: i,
						face: null,
						faceIndex: null,
						object: this
					});
				}
			}
		}

		updateMorphTargets() {
			const geometry = this.geometry;
			const morphAttributes = geometry.morphAttributes;
			const keys = Object.keys(morphAttributes);

			if (keys.length > 0) {
				const morphAttribute = morphAttributes[keys[0]];

				if (morphAttribute !== undefined) {
					this.morphTargetInfluences = [];
					this.morphTargetDictionary = {};

					for (let m = 0, ml = morphAttribute.length; m < ml; m++) {
						const name = morphAttribute[m].name || String(m);
						this.morphTargetInfluences.push(0);
						this.morphTargetDictionary[name] = m;
					}
				}
			}
		}

	}

	const _start = /*@__PURE__*/new Vector3();

	const _end = /*@__PURE__*/new Vector3();

	class LineSegments extends Line {
		constructor(geometry, material) {
			super(geometry, material);
			this.isLineSegments = true;
			this.type = 'LineSegments';
		}

		computeLineDistances() {
			const geometry = this.geometry; // we assume non-indexed geometry

			if (geometry.index === null) {
				const positionAttribute = geometry.attributes.position;
				const lineDistances = [];

				for (let i = 0, l = positionAttribute.count; i < l; i += 2) {
					_start.fromBufferAttribute(positionAttribute, i);

					_end.fromBufferAttribute(positionAttribute, i + 1);

					lineDistances[i] = i === 0 ? 0 : lineDistances[i - 1];
					lineDistances[i + 1] = lineDistances[i] + _start.distanceTo(_end);
				}

				geometry.setAttribute('lineDistance', new Float32BufferAttribute(lineDistances, 1));
			} else {
				console.warn('THREE.LineSegments.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.');
			}

			return this;
		}

	}

	class LineLoop extends Line {
		constructor(geometry, material) {
			super(geometry, material);
			this.isLineLoop = true;
			this.type = 'LineLoop';
		}

	}

	class PointsMaterial extends Material {
		constructor(parameters) {
			super();
			this.isPointsMaterial = true;
			this.type = 'PointsMaterial';
			this.color = new Color(0xffffff);
			this.map = null;
			this.alphaMap = null;
			this.size = 1;
			this.sizeAttenuation = true;
			this.fog = true;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.color.copy(source.color);
			this.map = source.map;
			this.alphaMap = source.alphaMap;
			this.size = source.size;
			this.sizeAttenuation = source.sizeAttenuation;
			this.fog = source.fog;
			return this;
		}

	}

	const _inverseMatrix = /*@__PURE__*/new Matrix4();

	const _ray = /*@__PURE__*/new Ray();

	const _sphere = /*@__PURE__*/new Sphere();

	const _position$2 = /*@__PURE__*/new Vector3();

	class Points extends Object3D {
		constructor(geometry = new BufferGeometry(), material = new PointsMaterial()) {
			super();
			this.isPoints = true;
			this.type = 'Points';
			this.geometry = geometry;
			this.material = material;
			this.updateMorphTargets();
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.material = source.material;
			this.geometry = source.geometry;
			return this;
		}

		raycast(raycaster, intersects) {
			const geometry = this.geometry;
			const matrixWorld = this.matrixWorld;
			const threshold = raycaster.params.Points.threshold;
			const drawRange = geometry.drawRange; // Checking boundingSphere distance to ray

			if (geometry.boundingSphere === null) geometry.computeBoundingSphere();

			_sphere.copy(geometry.boundingSphere);

			_sphere.applyMatrix4(matrixWorld);

			_sphere.radius += threshold;
			if (raycaster.ray.intersectsSphere(_sphere) === false) return; //

			_inverseMatrix.copy(matrixWorld).invert();

			_ray.copy(raycaster.ray).applyMatrix4(_inverseMatrix);

			const localThreshold = threshold / ((this.scale.x + this.scale.y + this.scale.z) / 3);
			const localThresholdSq = localThreshold * localThreshold;
			const index = geometry.index;
			const attributes = geometry.attributes;
			const positionAttribute = attributes.position;

			if (index !== null) {
				const start = Math.max(0, drawRange.start);
				const end = Math.min(index.count, drawRange.start + drawRange.count);

				for (let i = start, il = end; i < il; i++) {
					const a = index.getX(i);

					_position$2.fromBufferAttribute(positionAttribute, a);

					testPoint(_position$2, a, localThresholdSq, matrixWorld, raycaster, intersects, this);
				}
			} else {
				const start = Math.max(0, drawRange.start);
				const end = Math.min(positionAttribute.count, drawRange.start + drawRange.count);

				for (let i = start, l = end; i < l; i++) {
					_position$2.fromBufferAttribute(positionAttribute, i);

					testPoint(_position$2, i, localThresholdSq, matrixWorld, raycaster, intersects, this);
				}
			}
		}

		updateMorphTargets() {
			const geometry = this.geometry;
			const morphAttributes = geometry.morphAttributes;
			const keys = Object.keys(morphAttributes);

			if (keys.length > 0) {
				const morphAttribute = morphAttributes[keys[0]];

				if (morphAttribute !== undefined) {
					this.morphTargetInfluences = [];
					this.morphTargetDictionary = {};

					for (let m = 0, ml = morphAttribute.length; m < ml; m++) {
						const name = morphAttribute[m].name || String(m);
						this.morphTargetInfluences.push(0);
						this.morphTargetDictionary[name] = m;
					}
				}
			}
		}

	}

	function testPoint(point, index, localThresholdSq, matrixWorld, raycaster, intersects, object) {
		const rayPointDistanceSq = _ray.distanceSqToPoint(point);

		if (rayPointDistanceSq < localThresholdSq) {
			const intersectPoint = new Vector3();

			_ray.closestPointToPoint(point, intersectPoint);

			intersectPoint.applyMatrix4(matrixWorld);
			const distance = raycaster.ray.origin.distanceTo(intersectPoint);
			if (distance < raycaster.near || distance > raycaster.far) return;
			intersects.push({
				distance: distance,
				distanceToRay: Math.sqrt(rayPointDistanceSq),
				point: intersectPoint,
				index: index,
				face: null,
				object: object
			});
		}
	}

	class VideoTexture extends Texture {
		constructor(video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy) {
			super(video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);
			this.isVideoTexture = true;
			this.minFilter = minFilter !== undefined ? minFilter : LinearFilter;
			this.magFilter = magFilter !== undefined ? magFilter : LinearFilter;
			this.generateMipmaps = false;
			const scope = this;

			function updateVideo() {
				scope.needsUpdate = true;
				video.requestVideoFrameCallback(updateVideo);
			}

			if ('requestVideoFrameCallback' in video) {
				video.requestVideoFrameCallback(updateVideo);
			}
		}

		clone() {
			return new this.constructor(this.image).copy(this);
		}

		update() {
			const video = this.image;
			const hasVideoFrameCallback = ('requestVideoFrameCallback' in video);

			if (hasVideoFrameCallback === false && video.readyState >= video.HAVE_CURRENT_DATA) {
				this.needsUpdate = true;
			}
		}

	}

	class FramebufferTexture extends Texture {
		constructor(width, height, format) {
			super({
				width,
				height
			});
			this.isFramebufferTexture = true;
			this.format = format;
			this.magFilter = NearestFilter;
			this.minFilter = NearestFilter;
			this.generateMipmaps = false;
			this.needsUpdate = true;
		}

	}

	class CompressedTexture extends Texture {
		constructor(mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, encoding) {
			super(null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding);
			this.isCompressedTexture = true;
			this.image = {
				width: width,
				height: height
			};
			this.mipmaps = mipmaps; // no flipping for cube textures
			// (also flipping doesn't work for compressed textures )

			this.flipY = false; // can't generate mipmaps for compressed textures
			// mips must be embedded in DDS files

			this.generateMipmaps = false;
		}

	}

	class CanvasTexture extends Texture {
		constructor(canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy) {
			super(canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);
			this.isCanvasTexture = true;
			this.needsUpdate = true;
		}

	}

	/**
	 * Extensible curve object.
	 *
	 * Some common of curve methods:
	 * .getPoint( t, optionalTarget ), .getTangent( t, optionalTarget )
	 * .getPointAt( u, optionalTarget ), .getTangentAt( u, optionalTarget )
	 * .getPoints(), .getSpacedPoints()
	 * .getLength()
	 * .updateArcLengths()
	 *
	 * This following curves inherit from THREE.Curve:
	 *
	 * -- 2D curves --
	 * THREE.ArcCurve
	 * THREE.CubicBezierCurve
	 * THREE.EllipseCurve
	 * THREE.LineCurve
	 * THREE.QuadraticBezierCurve
	 * THREE.SplineCurve
	 *
	 * -- 3D curves --
	 * THREE.CatmullRomCurve3
	 * THREE.CubicBezierCurve3
	 * THREE.LineCurve3
	 * THREE.QuadraticBezierCurve3
	 *
	 * A series of curves can be represented as a THREE.CurvePath.
	 *
	 **/

	class Curve {
		constructor() {
			this.type = 'Curve';
			this.arcLengthDivisions = 200;
		} // Virtual base class method to overwrite and implement in subclasses
		//	- t [0 .. 1]


		getPoint() {
			console.warn('THREE.Curve: .getPoint() not implemented.');
			return null;
		} // Get point at relative position in curve according to arc length
		// - u [0 .. 1]


		getPointAt(u, optionalTarget) {
			const t = this.getUtoTmapping(u);
			return this.getPoint(t, optionalTarget);
		} // Get sequence of points using getPoint( t )


		getPoints(divisions = 5) {
			const points = [];

			for (let d = 0; d <= divisions; d++) {
				points.push(this.getPoint(d / divisions));
			}

			return points;
		} // Get sequence of points using getPointAt( u )


		getSpacedPoints(divisions = 5) {
			const points = [];

			for (let d = 0; d <= divisions; d++) {
				points.push(this.getPointAt(d / divisions));
			}

			return points;
		} // Get total curve arc length


		getLength() {
			const lengths = this.getLengths();
			return lengths[lengths.length - 1];
		} // Get list of cumulative segment lengths


		getLengths(divisions = this.arcLengthDivisions) {
			if (this.cacheArcLengths && this.cacheArcLengths.length === divisions + 1 && !this.needsUpdate) {
				return this.cacheArcLengths;
			}

			this.needsUpdate = false;
			const cache = [];
			let current,
					last = this.getPoint(0);
			let sum = 0;
			cache.push(0);

			for (let p = 1; p <= divisions; p++) {
				current = this.getPoint(p / divisions);
				sum += current.distanceTo(last);
				cache.push(sum);
				last = current;
			}

			this.cacheArcLengths = cache;
			return cache; // { sums: cache, sum: sum }; Sum is in the last element.
		}

		updateArcLengths() {
			this.needsUpdate = true;
			this.getLengths();
		} // Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equidistant


		getUtoTmapping(u, distance) {
			const arcLengths = this.getLengths();
			let i = 0;
			const il = arcLengths.length;
			let targetArcLength; // The targeted u distance value to get

			if (distance) {
				targetArcLength = distance;
			} else {
				targetArcLength = u * arcLengths[il - 1];
			} // binary search for the index with largest value smaller than target u distance


			let low = 0,
					high = il - 1,
					comparison;

			while (low <= high) {
				i = Math.floor(low + (high - low) / 2); // less likely to overflow, though probably not issue here, JS doesn't really have integers, all numbers are floats

				comparison = arcLengths[i] - targetArcLength;

				if (comparison < 0) {
					low = i + 1;
				} else if (comparison > 0) {
					high = i - 1;
				} else {
					high = i;
					break; // DONE
				}
			}

			i = high;

			if (arcLengths[i] === targetArcLength) {
				return i / (il - 1);
			} // we could get finer grain at lengths, or use simple interpolation between two points


			const lengthBefore = arcLengths[i];
			const lengthAfter = arcLengths[i + 1];
			const segmentLength = lengthAfter - lengthBefore; // determine where we are between the 'before' and 'after' points

			const segmentFraction = (targetArcLength - lengthBefore) / segmentLength; // add that fractional amount to t

			const t = (i + segmentFraction) / (il - 1);
			return t;
		} // Returns a unit vector tangent at t
		// In case any sub curve does not implement its tangent derivation,
		// 2 points a small delta apart will be used to find its gradient
		// which seems to give a reasonable approximation


		getTangent(t, optionalTarget) {
			const delta = 0.0001;
			let t1 = t - delta;
			let t2 = t + delta; // Capping in case of danger

			if (t1 < 0) t1 = 0;
			if (t2 > 1) t2 = 1;
			const pt1 = this.getPoint(t1);
			const pt2 = this.getPoint(t2);
			const tangent = optionalTarget || (pt1.isVector2 ? new Vector2() : new Vector3());
			tangent.copy(pt2).sub(pt1).normalize();
			return tangent;
		}

		getTangentAt(u, optionalTarget) {
			const t = this.getUtoTmapping(u);
			return this.getTangent(t, optionalTarget);
		}

		computeFrenetFrames(segments, closed) {
			// see http://www.cs.indiana.edu/pub/techreports/TR425.pdf
			const normal = new Vector3();
			const tangents = [];
			const normals = [];
			const binormals = [];
			const vec = new Vector3();
			const mat = new Matrix4(); // compute the tangent vectors for each segment on the curve

			for (let i = 0; i <= segments; i++) {
				const u = i / segments;
				tangents[i] = this.getTangentAt(u, new Vector3());
			} // select an initial normal vector perpendicular to the first tangent vector,
			// and in the direction of the minimum tangent xyz component


			normals[0] = new Vector3();
			binormals[0] = new Vector3();
			let min = Number.MAX_VALUE;
			const tx = Math.abs(tangents[0].x);
			const ty = Math.abs(tangents[0].y);
			const tz = Math.abs(tangents[0].z);

			if (tx <= min) {
				min = tx;
				normal.set(1, 0, 0);
			}

			if (ty <= min) {
				min = ty;
				normal.set(0, 1, 0);
			}

			if (tz <= min) {
				normal.set(0, 0, 1);
			}

			vec.crossVectors(tangents[0], normal).normalize();
			normals[0].crossVectors(tangents[0], vec);
			binormals[0].crossVectors(tangents[0], normals[0]); // compute the slowly-varying normal and binormal vectors for each segment on the curve

			for (let i = 1; i <= segments; i++) {
				normals[i] = normals[i - 1].clone();
				binormals[i] = binormals[i - 1].clone();
				vec.crossVectors(tangents[i - 1], tangents[i]);

				if (vec.length() > Number.EPSILON) {
					vec.normalize();
					const theta = Math.acos(clamp(tangents[i - 1].dot(tangents[i]), -1, 1)); // clamp for floating pt errors

					normals[i].applyMatrix4(mat.makeRotationAxis(vec, theta));
				}

				binormals[i].crossVectors(tangents[i], normals[i]);
			} // if the curve is closed, postprocess the vectors so the first and last normal vectors are the same


			if (closed === true) {
				let theta = Math.acos(clamp(normals[0].dot(normals[segments]), -1, 1));
				theta /= segments;

				if (tangents[0].dot(vec.crossVectors(normals[0], normals[segments])) > 0) {
					theta = -theta;
				}

				for (let i = 1; i <= segments; i++) {
					// twist a little...
					normals[i].applyMatrix4(mat.makeRotationAxis(tangents[i], theta * i));
					binormals[i].crossVectors(tangents[i], normals[i]);
				}
			}

			return {
				tangents: tangents,
				normals: normals,
				binormals: binormals
			};
		}

		clone() {
			return new this.constructor().copy(this);
		}

		copy(source) {
			this.arcLengthDivisions = source.arcLengthDivisions;
			return this;
		}

		toJSON() {
			const data = {
				metadata: {
					version: 4.5,
					type: 'Curve',
					generator: 'Curve.toJSON'
				}
			};
			data.arcLengthDivisions = this.arcLengthDivisions;
			data.type = this.type;
			return data;
		}

		fromJSON(json) {
			this.arcLengthDivisions = json.arcLengthDivisions;
			return this;
		}

	}

	class EllipseCurve extends Curve {
		constructor(aX = 0, aY = 0, xRadius = 1, yRadius = 1, aStartAngle = 0, aEndAngle = Math.PI * 2, aClockwise = false, aRotation = 0) {
			super();
			this.isEllipseCurve = true;
			this.type = 'EllipseCurve';
			this.aX = aX;
			this.aY = aY;
			this.xRadius = xRadius;
			this.yRadius = yRadius;
			this.aStartAngle = aStartAngle;
			this.aEndAngle = aEndAngle;
			this.aClockwise = aClockwise;
			this.aRotation = aRotation;
		}

		getPoint(t, optionalTarget) {
			const point = optionalTarget || new Vector2();
			const twoPi = Math.PI * 2;
			let deltaAngle = this.aEndAngle - this.aStartAngle;
			const samePoints = Math.abs(deltaAngle) < Number.EPSILON; // ensures that deltaAngle is 0 .. 2 PI

			while (deltaAngle < 0) deltaAngle += twoPi;

			while (deltaAngle > twoPi) deltaAngle -= twoPi;

			if (deltaAngle < Number.EPSILON) {
				if (samePoints) {
					deltaAngle = 0;
				} else {
					deltaAngle = twoPi;
				}
			}

			if (this.aClockwise === true && !samePoints) {
				if (deltaAngle === twoPi) {
					deltaAngle = -twoPi;
				} else {
					deltaAngle = deltaAngle - twoPi;
				}
			}

			const angle = this.aStartAngle + t * deltaAngle;
			let x = this.aX + this.xRadius * Math.cos(angle);
			let y = this.aY + this.yRadius * Math.sin(angle);

			if (this.aRotation !== 0) {
				const cos = Math.cos(this.aRotation);
				const sin = Math.sin(this.aRotation);
				const tx = x - this.aX;
				const ty = y - this.aY; // Rotate the point about the center of the ellipse.

				x = tx * cos - ty * sin + this.aX;
				y = tx * sin + ty * cos + this.aY;
			}

			return point.set(x, y);
		}

		copy(source) {
			super.copy(source);
			this.aX = source.aX;
			this.aY = source.aY;
			this.xRadius = source.xRadius;
			this.yRadius = source.yRadius;
			this.aStartAngle = source.aStartAngle;
			this.aEndAngle = source.aEndAngle;
			this.aClockwise = source.aClockwise;
			this.aRotation = source.aRotation;
			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.aX = this.aX;
			data.aY = this.aY;
			data.xRadius = this.xRadius;
			data.yRadius = this.yRadius;
			data.aStartAngle = this.aStartAngle;
			data.aEndAngle = this.aEndAngle;
			data.aClockwise = this.aClockwise;
			data.aRotation = this.aRotation;
			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.aX = json.aX;
			this.aY = json.aY;
			this.xRadius = json.xRadius;
			this.yRadius = json.yRadius;
			this.aStartAngle = json.aStartAngle;
			this.aEndAngle = json.aEndAngle;
			this.aClockwise = json.aClockwise;
			this.aRotation = json.aRotation;
			return this;
		}

	}

	class ArcCurve extends EllipseCurve {
		constructor(aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise) {
			super(aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise);
			this.isArcCurve = true;
			this.type = 'ArcCurve';
		}

	}

	/**
	 * Centripetal CatmullRom Curve - which is useful for avoiding
	 * cusps and self-intersections in non-uniform catmull rom curves.
	 * http://www.cemyuksel.com/research/catmullrom_param/catmullrom.pdf
	 *
	 * curve.type accepts centripetal(default), chordal and catmullrom
	 * curve.tension is used for catmullrom which defaults to 0.5
	 */

	/*
	Based on an optimized c++ solution in
	 - http://stackoverflow.com/questions/9489736/catmull-rom-curve-with-no-cusps-and-no-self-intersections/
	 - http://ideone.com/NoEbVM

	This CubicPoly class could be used for reusing some variables and calculations,
	but for three.js curve use, it could be possible inlined and flatten into a single function call
	which can be placed in CurveUtils.
	*/

	function CubicPoly() {
		let c0 = 0,
				c1 = 0,
				c2 = 0,
				c3 = 0;
		/*
		 * Compute coefficients for a cubic polynomial
		 *	 p(s) = c0 + c1*s + c2*s^2 + c3*s^3
		 * such that
		 *	 p(0) = x0, p(1) = x1
		 *	and
		 *	 p'(0) = t0, p'(1) = t1.
		 */

		function init(x0, x1, t0, t1) {
			c0 = x0;
			c1 = t0;
			c2 = -3 * x0 + 3 * x1 - 2 * t0 - t1;
			c3 = 2 * x0 - 2 * x1 + t0 + t1;
		}

		return {
			initCatmullRom: function (x0, x1, x2, x3, tension) {
				init(x1, x2, tension * (x2 - x0), tension * (x3 - x1));
			},
			initNonuniformCatmullRom: function (x0, x1, x2, x3, dt0, dt1, dt2) {
				// compute tangents when parameterized in [t1,t2]
				let t1 = (x1 - x0) / dt0 - (x2 - x0) / (dt0 + dt1) + (x2 - x1) / dt1;
				let t2 = (x2 - x1) / dt1 - (x3 - x1) / (dt1 + dt2) + (x3 - x2) / dt2; // rescale tangents for parametrization in [0,1]

				t1 *= dt1;
				t2 *= dt1;
				init(x1, x2, t1, t2);
			},
			calc: function (t) {
				const t2 = t * t;
				const t3 = t2 * t;
				return c0 + c1 * t + c2 * t2 + c3 * t3;
			}
		};
	} //


	const tmp = /*@__PURE__*/new Vector3();
	const px = /*@__PURE__*/new CubicPoly();
	const py = /*@__PURE__*/new CubicPoly();
	const pz = /*@__PURE__*/new CubicPoly();

	class CatmullRomCurve3 extends Curve {
		constructor(points = [], closed = false, curveType = 'centripetal', tension = 0.5) {
			super();
			this.isCatmullRomCurve3 = true;
			this.type = 'CatmullRomCurve3';
			this.points = points;
			this.closed = closed;
			this.curveType = curveType;
			this.tension = tension;
		}

		getPoint(t, optionalTarget = new Vector3()) {
			const point = optionalTarget;
			const points = this.points;
			const l = points.length;
			const p = (l - (this.closed ? 0 : 1)) * t;
			let intPoint = Math.floor(p);
			let weight = p - intPoint;

			if (this.closed) {
				intPoint += intPoint > 0 ? 0 : (Math.floor(Math.abs(intPoint) / l) + 1) * l;
			} else if (weight === 0 && intPoint === l - 1) {
				intPoint = l - 2;
				weight = 1;
			}

			let p0, p3; // 4 points (p1 & p2 defined below)

			if (this.closed || intPoint > 0) {
				p0 = points[(intPoint - 1) % l];
			} else {
				// extrapolate first point
				tmp.subVectors(points[0], points[1]).add(points[0]);
				p0 = tmp;
			}

			const p1 = points[intPoint % l];
			const p2 = points[(intPoint + 1) % l];

			if (this.closed || intPoint + 2 < l) {
				p3 = points[(intPoint + 2) % l];
			} else {
				// extrapolate last point
				tmp.subVectors(points[l - 1], points[l - 2]).add(points[l - 1]);
				p3 = tmp;
			}

			if (this.curveType === 'centripetal' || this.curveType === 'chordal') {
				// init Centripetal / Chordal Catmull-Rom
				const pow = this.curveType === 'chordal' ? 0.5 : 0.25;
				let dt0 = Math.pow(p0.distanceToSquared(p1), pow);
				let dt1 = Math.pow(p1.distanceToSquared(p2), pow);
				let dt2 = Math.pow(p2.distanceToSquared(p3), pow); // safety check for repeated points

				if (dt1 < 1e-4) dt1 = 1.0;
				if (dt0 < 1e-4) dt0 = dt1;
				if (dt2 < 1e-4) dt2 = dt1;
				px.initNonuniformCatmullRom(p0.x, p1.x, p2.x, p3.x, dt0, dt1, dt2);
				py.initNonuniformCatmullRom(p0.y, p1.y, p2.y, p3.y, dt0, dt1, dt2);
				pz.initNonuniformCatmullRom(p0.z, p1.z, p2.z, p3.z, dt0, dt1, dt2);
			} else if (this.curveType === 'catmullrom') {
				px.initCatmullRom(p0.x, p1.x, p2.x, p3.x, this.tension);
				py.initCatmullRom(p0.y, p1.y, p2.y, p3.y, this.tension);
				pz.initCatmullRom(p0.z, p1.z, p2.z, p3.z, this.tension);
			}

			point.set(px.calc(weight), py.calc(weight), pz.calc(weight));
			return point;
		}

		copy(source) {
			super.copy(source);
			this.points = [];

			for (let i = 0, l = source.points.length; i < l; i++) {
				const point = source.points[i];
				this.points.push(point.clone());
			}

			this.closed = source.closed;
			this.curveType = source.curveType;
			this.tension = source.tension;
			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.points = [];

			for (let i = 0, l = this.points.length; i < l; i++) {
				const point = this.points[i];
				data.points.push(point.toArray());
			}

			data.closed = this.closed;
			data.curveType = this.curveType;
			data.tension = this.tension;
			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.points = [];

			for (let i = 0, l = json.points.length; i < l; i++) {
				const point = json.points[i];
				this.points.push(new Vector3().fromArray(point));
			}

			this.closed = json.closed;
			this.curveType = json.curveType;
			this.tension = json.tension;
			return this;
		}

	}

	/**
	 * Bezier Curves formulas obtained from
	 * https://en.wikipedia.org/wiki/B%C3%A9zier_curve
	 */
	function CatmullRom(t, p0, p1, p2, p3) {
		const v0 = (p2 - p0) * 0.5;
		const v1 = (p3 - p1) * 0.5;
		const t2 = t * t;
		const t3 = t * t2;
		return (2 * p1 - 2 * p2 + v0 + v1) * t3 + (-3 * p1 + 3 * p2 - 2 * v0 - v1) * t2 + v0 * t + p1;
	} //


	function QuadraticBezierP0(t, p) {
		const k = 1 - t;
		return k * k * p;
	}

	function QuadraticBezierP1(t, p) {
		return 2 * (1 - t) * t * p;
	}

	function QuadraticBezierP2(t, p) {
		return t * t * p;
	}

	function QuadraticBezier(t, p0, p1, p2) {
		return QuadraticBezierP0(t, p0) + QuadraticBezierP1(t, p1) + QuadraticBezierP2(t, p2);
	} //


	function CubicBezierP0(t, p) {
		const k = 1 - t;
		return k * k * k * p;
	}

	function CubicBezierP1(t, p) {
		const k = 1 - t;
		return 3 * k * k * t * p;
	}

	function CubicBezierP2(t, p) {
		return 3 * (1 - t) * t * t * p;
	}

	function CubicBezierP3(t, p) {
		return t * t * t * p;
	}

	function CubicBezier(t, p0, p1, p2, p3) {
		return CubicBezierP0(t, p0) + CubicBezierP1(t, p1) + CubicBezierP2(t, p2) + CubicBezierP3(t, p3);
	}

	class CubicBezierCurve extends Curve {
		constructor(v0 = new Vector2(), v1 = new Vector2(), v2 = new Vector2(), v3 = new Vector2()) {
			super();
			this.isCubicBezierCurve = true;
			this.type = 'CubicBezierCurve';
			this.v0 = v0;
			this.v1 = v1;
			this.v2 = v2;
			this.v3 = v3;
		}

		getPoint(t, optionalTarget = new Vector2()) {
			const point = optionalTarget;
			const v0 = this.v0,
						v1 = this.v1,
						v2 = this.v2,
						v3 = this.v3;
			point.set(CubicBezier(t, v0.x, v1.x, v2.x, v3.x), CubicBezier(t, v0.y, v1.y, v2.y, v3.y));
			return point;
		}

		copy(source) {
			super.copy(source);
			this.v0.copy(source.v0);
			this.v1.copy(source.v1);
			this.v2.copy(source.v2);
			this.v3.copy(source.v3);
			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.v0 = this.v0.toArray();
			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();
			data.v3 = this.v3.toArray();
			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.v0.fromArray(json.v0);
			this.v1.fromArray(json.v1);
			this.v2.fromArray(json.v2);
			this.v3.fromArray(json.v3);
			return this;
		}

	}

	class CubicBezierCurve3 extends Curve {
		constructor(v0 = new Vector3(), v1 = new Vector3(), v2 = new Vector3(), v3 = new Vector3()) {
			super();
			this.isCubicBezierCurve3 = true;
			this.type = 'CubicBezierCurve3';
			this.v0 = v0;
			this.v1 = v1;
			this.v2 = v2;
			this.v3 = v3;
		}

		getPoint(t, optionalTarget = new Vector3()) {
			const point = optionalTarget;
			const v0 = this.v0,
						v1 = this.v1,
						v2 = this.v2,
						v3 = this.v3;
			point.set(CubicBezier(t, v0.x, v1.x, v2.x, v3.x), CubicBezier(t, v0.y, v1.y, v2.y, v3.y), CubicBezier(t, v0.z, v1.z, v2.z, v3.z));
			return point;
		}

		copy(source) {
			super.copy(source);
			this.v0.copy(source.v0);
			this.v1.copy(source.v1);
			this.v2.copy(source.v2);
			this.v3.copy(source.v3);
			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.v0 = this.v0.toArray();
			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();
			data.v3 = this.v3.toArray();
			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.v0.fromArray(json.v0);
			this.v1.fromArray(json.v1);
			this.v2.fromArray(json.v2);
			this.v3.fromArray(json.v3);
			return this;
		}

	}

	class LineCurve extends Curve {
		constructor(v1 = new Vector2(), v2 = new Vector2()) {
			super();
			this.isLineCurve = true;
			this.type = 'LineCurve';
			this.v1 = v1;
			this.v2 = v2;
		}

		getPoint(t, optionalTarget = new Vector2()) {
			const point = optionalTarget;

			if (t === 1) {
				point.copy(this.v2);
			} else {
				point.copy(this.v2).sub(this.v1);
				point.multiplyScalar(t).add(this.v1);
			}

			return point;
		} // Line curve is linear, so we can overwrite default getPointAt


		getPointAt(u, optionalTarget) {
			return this.getPoint(u, optionalTarget);
		}

		getTangent(t, optionalTarget) {
			const tangent = optionalTarget || new Vector2();
			tangent.copy(this.v2).sub(this.v1).normalize();
			return tangent;
		}

		copy(source) {
			super.copy(source);
			this.v1.copy(source.v1);
			this.v2.copy(source.v2);
			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();
			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.v1.fromArray(json.v1);
			this.v2.fromArray(json.v2);
			return this;
		}

	}

	class LineCurve3 extends Curve {
		constructor(v1 = new Vector3(), v2 = new Vector3()) {
			super();
			this.isLineCurve3 = true;
			this.type = 'LineCurve3';
			this.v1 = v1;
			this.v2 = v2;
		}

		getPoint(t, optionalTarget = new Vector3()) {
			const point = optionalTarget;

			if (t === 1) {
				point.copy(this.v2);
			} else {
				point.copy(this.v2).sub(this.v1);
				point.multiplyScalar(t).add(this.v1);
			}

			return point;
		} // Line curve is linear, so we can overwrite default getPointAt


		getPointAt(u, optionalTarget) {
			return this.getPoint(u, optionalTarget);
		}

		copy(source) {
			super.copy(source);
			this.v1.copy(source.v1);
			this.v2.copy(source.v2);
			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();
			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.v1.fromArray(json.v1);
			this.v2.fromArray(json.v2);
			return this;
		}

	}

	class QuadraticBezierCurve extends Curve {
		constructor(v0 = new Vector2(), v1 = new Vector2(), v2 = new Vector2()) {
			super();
			this.isQuadraticBezierCurve = true;
			this.type = 'QuadraticBezierCurve';
			this.v0 = v0;
			this.v1 = v1;
			this.v2 = v2;
		}

		getPoint(t, optionalTarget = new Vector2()) {
			const point = optionalTarget;
			const v0 = this.v0,
						v1 = this.v1,
						v2 = this.v2;
			point.set(QuadraticBezier(t, v0.x, v1.x, v2.x), QuadraticBezier(t, v0.y, v1.y, v2.y));
			return point;
		}

		copy(source) {
			super.copy(source);
			this.v0.copy(source.v0);
			this.v1.copy(source.v1);
			this.v2.copy(source.v2);
			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.v0 = this.v0.toArray();
			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();
			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.v0.fromArray(json.v0);
			this.v1.fromArray(json.v1);
			this.v2.fromArray(json.v2);
			return this;
		}

	}

	class QuadraticBezierCurve3 extends Curve {
		constructor(v0 = new Vector3(), v1 = new Vector3(), v2 = new Vector3()) {
			super();
			this.isQuadraticBezierCurve3 = true;
			this.type = 'QuadraticBezierCurve3';
			this.v0 = v0;
			this.v1 = v1;
			this.v2 = v2;
		}

		getPoint(t, optionalTarget = new Vector3()) {
			const point = optionalTarget;
			const v0 = this.v0,
						v1 = this.v1,
						v2 = this.v2;
			point.set(QuadraticBezier(t, v0.x, v1.x, v2.x), QuadraticBezier(t, v0.y, v1.y, v2.y), QuadraticBezier(t, v0.z, v1.z, v2.z));
			return point;
		}

		copy(source) {
			super.copy(source);
			this.v0.copy(source.v0);
			this.v1.copy(source.v1);
			this.v2.copy(source.v2);
			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.v0 = this.v0.toArray();
			data.v1 = this.v1.toArray();
			data.v2 = this.v2.toArray();
			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.v0.fromArray(json.v0);
			this.v1.fromArray(json.v1);
			this.v2.fromArray(json.v2);
			return this;
		}

	}

	class SplineCurve extends Curve {
		constructor(points = []) {
			super();
			this.isSplineCurve = true;
			this.type = 'SplineCurve';
			this.points = points;
		}

		getPoint(t, optionalTarget = new Vector2()) {
			const point = optionalTarget;
			const points = this.points;
			const p = (points.length - 1) * t;
			const intPoint = Math.floor(p);
			const weight = p - intPoint;
			const p0 = points[intPoint === 0 ? intPoint : intPoint - 1];
			const p1 = points[intPoint];
			const p2 = points[intPoint > points.length - 2 ? points.length - 1 : intPoint + 1];
			const p3 = points[intPoint > points.length - 3 ? points.length - 1 : intPoint + 2];
			point.set(CatmullRom(weight, p0.x, p1.x, p2.x, p3.x), CatmullRom(weight, p0.y, p1.y, p2.y, p3.y));
			return point;
		}

		copy(source) {
			super.copy(source);
			this.points = [];

			for (let i = 0, l = source.points.length; i < l; i++) {
				const point = source.points[i];
				this.points.push(point.clone());
			}

			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.points = [];

			for (let i = 0, l = this.points.length; i < l; i++) {
				const point = this.points[i];
				data.points.push(point.toArray());
			}

			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.points = [];

			for (let i = 0, l = json.points.length; i < l; i++) {
				const point = json.points[i];
				this.points.push(new Vector2().fromArray(point));
			}

			return this;
		}

	}

	var Curves = /*#__PURE__*/Object.freeze({
		__proto__: null,
		ArcCurve: ArcCurve,
		CatmullRomCurve3: CatmullRomCurve3,
		CubicBezierCurve: CubicBezierCurve,
		CubicBezierCurve3: CubicBezierCurve3,
		EllipseCurve: EllipseCurve,
		LineCurve: LineCurve,
		LineCurve3: LineCurve3,
		QuadraticBezierCurve: QuadraticBezierCurve,
		QuadraticBezierCurve3: QuadraticBezierCurve3,
		SplineCurve: SplineCurve
	});

	/**************************************************************
	 *	Curved Path - a curve path is simply a array of connected
	 *	curves, but retains the api of a curve
	 **************************************************************/

	class CurvePath extends Curve {
		constructor() {
			super();
			this.type = 'CurvePath';
			this.curves = [];
			this.autoClose = false; // Automatically closes the path
		}

		add(curve) {
			this.curves.push(curve);
		}

		closePath() {
			// Add a line curve if start and end of lines are not connected
			const startPoint = this.curves[0].getPoint(0);
			const endPoint = this.curves[this.curves.length - 1].getPoint(1);

			if (!startPoint.equals(endPoint)) {
				this.curves.push(new LineCurve(endPoint, startPoint));
			}
		} // To get accurate point with reference to
		// entire path distance at time t,
		// following has to be done:
		// 1. Length of each sub path have to be known
		// 2. Locate and identify type of curve
		// 3. Get t for the curve
		// 4. Return curve.getPointAt(t')


		getPoint(t, optionalTarget) {
			const d = t * this.getLength();
			const curveLengths = this.getCurveLengths();
			let i = 0; // To think about boundaries points.

			while (i < curveLengths.length) {
				if (curveLengths[i] >= d) {
					const diff = curveLengths[i] - d;
					const curve = this.curves[i];
					const segmentLength = curve.getLength();
					const u = segmentLength === 0 ? 0 : 1 - diff / segmentLength;
					return curve.getPointAt(u, optionalTarget);
				}

				i++;
			}

			return null; // loop where sum != 0, sum > d , sum+1 <d
		} // We cannot use the default THREE.Curve getPoint() with getLength() because in
		// THREE.Curve, getLength() depends on getPoint() but in THREE.CurvePath
		// getPoint() depends on getLength


		getLength() {
			const lens = this.getCurveLengths();
			return lens[lens.length - 1];
		} // cacheLengths must be recalculated.


		updateArcLengths() {
			this.needsUpdate = true;
			this.cacheLengths = null;
			this.getCurveLengths();
		} // Compute lengths and cache them
		// We cannot overwrite getLengths() because UtoT mapping uses it.


		getCurveLengths() {
			// We use cache values if curves and cache array are same length
			if (this.cacheLengths && this.cacheLengths.length === this.curves.length) {
				return this.cacheLengths;
			} // Get length of sub-curve
			// Push sums into cached array


			const lengths = [];
			let sums = 0;

			for (let i = 0, l = this.curves.length; i < l; i++) {
				sums += this.curves[i].getLength();
				lengths.push(sums);
			}

			this.cacheLengths = lengths;
			return lengths;
		}

		getSpacedPoints(divisions = 40) {
			const points = [];

			for (let i = 0; i <= divisions; i++) {
				points.push(this.getPoint(i / divisions));
			}

			if (this.autoClose) {
				points.push(points[0]);
			}

			return points;
		}

		getPoints(divisions = 12) {
			const points = [];
			let last;

			for (let i = 0, curves = this.curves; i < curves.length; i++) {
				const curve = curves[i];
				const resolution = curve.isEllipseCurve ? divisions * 2 : curve.isLineCurve || curve.isLineCurve3 ? 1 : curve.isSplineCurve ? divisions * curve.points.length : divisions;
				const pts = curve.getPoints(resolution);

				for (let j = 0; j < pts.length; j++) {
					const point = pts[j];
					if (last && last.equals(point)) continue; // ensures no consecutive points are duplicates

					points.push(point);
					last = point;
				}
			}

			if (this.autoClose && points.length > 1 && !points[points.length - 1].equals(points[0])) {
				points.push(points[0]);
			}

			return points;
		}

		copy(source) {
			super.copy(source);
			this.curves = [];

			for (let i = 0, l = source.curves.length; i < l; i++) {
				const curve = source.curves[i];
				this.curves.push(curve.clone());
			}

			this.autoClose = source.autoClose;
			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.autoClose = this.autoClose;
			data.curves = [];

			for (let i = 0, l = this.curves.length; i < l; i++) {
				const curve = this.curves[i];
				data.curves.push(curve.toJSON());
			}

			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.autoClose = json.autoClose;
			this.curves = [];

			for (let i = 0, l = json.curves.length; i < l; i++) {
				const curve = json.curves[i];
				this.curves.push(new Curves[curve.type]().fromJSON(curve));
			}

			return this;
		}

	}

	class Path extends CurvePath {
		constructor(points) {
			super();
			this.type = 'Path';
			this.currentPoint = new Vector2();

			if (points) {
				this.setFromPoints(points);
			}
		}

		setFromPoints(points) {
			this.moveTo(points[0].x, points[0].y);

			for (let i = 1, l = points.length; i < l; i++) {
				this.lineTo(points[i].x, points[i].y);
			}

			return this;
		}

		moveTo(x, y) {
			this.currentPoint.set(x, y); // TODO consider referencing vectors instead of copying?

			return this;
		}

		lineTo(x, y) {
			const curve = new LineCurve(this.currentPoint.clone(), new Vector2(x, y));
			this.curves.push(curve);
			this.currentPoint.set(x, y);
			return this;
		}

		quadraticCurveTo(aCPx, aCPy, aX, aY) {
			const curve = new QuadraticBezierCurve(this.currentPoint.clone(), new Vector2(aCPx, aCPy), new Vector2(aX, aY));
			this.curves.push(curve);
			this.currentPoint.set(aX, aY);
			return this;
		}

		bezierCurveTo(aCP1x, aCP1y, aCP2x, aCP2y, aX, aY) {
			const curve = new CubicBezierCurve(this.currentPoint.clone(), new Vector2(aCP1x, aCP1y), new Vector2(aCP2x, aCP2y), new Vector2(aX, aY));
			this.curves.push(curve);
			this.currentPoint.set(aX, aY);
			return this;
		}

		splineThru(pts
		/*Array of Vector*/
		) {
			const npts = [this.currentPoint.clone()].concat(pts);
			const curve = new SplineCurve(npts);
			this.curves.push(curve);
			this.currentPoint.copy(pts[pts.length - 1]);
			return this;
		}

		arc(aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise) {
			const x0 = this.currentPoint.x;
			const y0 = this.currentPoint.y;
			this.absarc(aX + x0, aY + y0, aRadius, aStartAngle, aEndAngle, aClockwise);
			return this;
		}

		absarc(aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise) {
			this.absellipse(aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise);
			return this;
		}

		ellipse(aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation) {
			const x0 = this.currentPoint.x;
			const y0 = this.currentPoint.y;
			this.absellipse(aX + x0, aY + y0, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation);
			return this;
		}

		absellipse(aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation) {
			const curve = new EllipseCurve(aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation);

			if (this.curves.length > 0) {
				// if a previous curve is present, attempt to join
				const firstPoint = curve.getPoint(0);

				if (!firstPoint.equals(this.currentPoint)) {
					this.lineTo(firstPoint.x, firstPoint.y);
				}
			}

			this.curves.push(curve);
			const lastPoint = curve.getPoint(1);
			this.currentPoint.copy(lastPoint);
			return this;
		}

		copy(source) {
			super.copy(source);
			this.currentPoint.copy(source.currentPoint);
			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.currentPoint = this.currentPoint.toArray();
			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.currentPoint.fromArray(json.currentPoint);
			return this;
		}

	}

	class LatheGeometry extends BufferGeometry {
		constructor(points = [new Vector2(0, -0.5), new Vector2(0.5, 0), new Vector2(0, 0.5)], segments = 12, phiStart = 0, phiLength = Math.PI * 2) {
			super();
			this.type = 'LatheGeometry';
			this.parameters = {
				points: points,
				segments: segments,
				phiStart: phiStart,
				phiLength: phiLength
			};
			segments = Math.floor(segments); // clamp phiLength so it's in range of [ 0, 2PI ]

			phiLength = clamp(phiLength, 0, Math.PI * 2); // buffers

			const indices = [];
			const vertices = [];
			const uvs = [];
			const initNormals = [];
			const normals = []; // helper variables

			const inverseSegments = 1.0 / segments;
			const vertex = new Vector3();
			const uv = new Vector2();
			const normal = new Vector3();
			const curNormal = new Vector3();
			const prevNormal = new Vector3();
			let dx = 0;
			let dy = 0; // pre-compute normals for initial "meridian"

			for (let j = 0; j <= points.length - 1; j++) {
				switch (j) {
					case 0:
						// special handling for 1st vertex on path
						dx = points[j + 1].x - points[j].x;
						dy = points[j + 1].y - points[j].y;
						normal.x = dy * 1.0;
						normal.y = -dx;
						normal.z = dy * 0.0;
						prevNormal.copy(normal);
						normal.normalize();
						initNormals.push(normal.x, normal.y, normal.z);
						break;

					case points.length - 1:
						// special handling for last Vertex on path
						initNormals.push(prevNormal.x, prevNormal.y, prevNormal.z);
						break;

					default:
						// default handling for all vertices in between
						dx = points[j + 1].x - points[j].x;
						dy = points[j + 1].y - points[j].y;
						normal.x = dy * 1.0;
						normal.y = -dx;
						normal.z = dy * 0.0;
						curNormal.copy(normal);
						normal.x += prevNormal.x;
						normal.y += prevNormal.y;
						normal.z += prevNormal.z;
						normal.normalize();
						initNormals.push(normal.x, normal.y, normal.z);
						prevNormal.copy(curNormal);
				}
			} // generate vertices, uvs and normals


			for (let i = 0; i <= segments; i++) {
				const phi = phiStart + i * inverseSegments * phiLength;
				const sin = Math.sin(phi);
				const cos = Math.cos(phi);

				for (let j = 0; j <= points.length - 1; j++) {
					// vertex
					vertex.x = points[j].x * sin;
					vertex.y = points[j].y;
					vertex.z = points[j].x * cos;
					vertices.push(vertex.x, vertex.y, vertex.z); // uv

					uv.x = i / segments;
					uv.y = j / (points.length - 1);
					uvs.push(uv.x, uv.y); // normal

					const x = initNormals[3 * j + 0] * sin;
					const y = initNormals[3 * j + 1];
					const z = initNormals[3 * j + 0] * cos;
					normals.push(x, y, z);
				}
			} // indices


			for (let i = 0; i < segments; i++) {
				for (let j = 0; j < points.length - 1; j++) {
					const base = j + i * points.length;
					const a = base;
					const b = base + points.length;
					const c = base + points.length + 1;
					const d = base + 1; // faces

					indices.push(a, b, d);
					indices.push(c, d, b);
				}
			} // build geometry


			this.setIndex(indices);
			this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));
			this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
		}

		static fromJSON(data) {
			return new LatheGeometry(data.points, data.segments, data.phiStart, data.phiLength);
		}

	}

	class CapsuleGeometry extends LatheGeometry {
		constructor(radius = 1, length = 1, capSegments = 4, radialSegments = 8) {
			const path = new Path();
			path.absarc(0, -length / 2, radius, Math.PI * 1.5, 0);
			path.absarc(0, length / 2, radius, 0, Math.PI * 0.5);
			super(path.getPoints(capSegments), radialSegments);
			this.type = 'CapsuleGeometry';
			this.parameters = {
				radius: radius,
				height: length,
				capSegments: capSegments,
				radialSegments: radialSegments
			};
		}

		static fromJSON(data) {
			return new CapsuleGeometry(data.radius, data.length, data.capSegments, data.radialSegments);
		}

	}

	class CircleGeometry extends BufferGeometry {
		constructor(radius = 1, segments = 8, thetaStart = 0, thetaLength = Math.PI * 2) {
			super();
			this.type = 'CircleGeometry';
			this.parameters = {
				radius: radius,
				segments: segments,
				thetaStart: thetaStart,
				thetaLength: thetaLength
			};
			segments = Math.max(3, segments); // buffers

			const indices = [];
			const vertices = [];
			const normals = [];
			const uvs = []; // helper variables

			const vertex = new Vector3();
			const uv = new Vector2(); // center point

			vertices.push(0, 0, 0);
			normals.push(0, 0, 1);
			uvs.push(0.5, 0.5);

			for (let s = 0, i = 3; s <= segments; s++, i += 3) {
				const segment = thetaStart + s / segments * thetaLength; // vertex

				vertex.x = radius * Math.cos(segment);
				vertex.y = radius * Math.sin(segment);
				vertices.push(vertex.x, vertex.y, vertex.z); // normal

				normals.push(0, 0, 1); // uvs

				uv.x = (vertices[i] / radius + 1) / 2;
				uv.y = (vertices[i + 1] / radius + 1) / 2;
				uvs.push(uv.x, uv.y);
			} // indices


			for (let i = 1; i <= segments; i++) {
				indices.push(i, i + 1, 0);
			} // build geometry


			this.setIndex(indices);
			this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));
		}

		static fromJSON(data) {
			return new CircleGeometry(data.radius, data.segments, data.thetaStart, data.thetaLength);
		}

	}

	class CylinderGeometry extends BufferGeometry {
		constructor(radiusTop = 1, radiusBottom = 1, height = 1, radialSegments = 8, heightSegments = 1, openEnded = false, thetaStart = 0, thetaLength = Math.PI * 2) {
			super();
			this.type = 'CylinderGeometry';
			this.parameters = {
				radiusTop: radiusTop,
				radiusBottom: radiusBottom,
				height: height,
				radialSegments: radialSegments,
				heightSegments: heightSegments,
				openEnded: openEnded,
				thetaStart: thetaStart,
				thetaLength: thetaLength
			};
			const scope = this;
			radialSegments = Math.floor(radialSegments);
			heightSegments = Math.floor(heightSegments); // buffers

			const indices = [];
			const vertices = [];
			const normals = [];
			const uvs = []; // helper variables

			let index = 0;
			const indexArray = [];
			const halfHeight = height / 2;
			let groupStart = 0; // generate geometry

			generateTorso();

			if (openEnded === false) {
				if (radiusTop > 0) generateCap(true);
				if (radiusBottom > 0) generateCap(false);
			} // build geometry


			this.setIndex(indices);
			this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));

			function generateTorso() {
				const normal = new Vector3();
				const vertex = new Vector3();
				let groupCount = 0; // this will be used to calculate the normal

				const slope = (radiusBottom - radiusTop) / height; // generate vertices, normals and uvs

				for (let y = 0; y <= heightSegments; y++) {
					const indexRow = [];
					const v = y / heightSegments; // calculate the radius of the current row

					const radius = v * (radiusBottom - radiusTop) + radiusTop;

					for (let x = 0; x <= radialSegments; x++) {
						const u = x / radialSegments;
						const theta = u * thetaLength + thetaStart;
						const sinTheta = Math.sin(theta);
						const cosTheta = Math.cos(theta); // vertex

						vertex.x = radius * sinTheta;
						vertex.y = -v * height + halfHeight;
						vertex.z = radius * cosTheta;
						vertices.push(vertex.x, vertex.y, vertex.z); // normal

						normal.set(sinTheta, slope, cosTheta).normalize();
						normals.push(normal.x, normal.y, normal.z); // uv

						uvs.push(u, 1 - v); // save index of vertex in respective row

						indexRow.push(index++);
					} // now save vertices of the row in our index array


					indexArray.push(indexRow);
				} // generate indices


				for (let x = 0; x < radialSegments; x++) {
					for (let y = 0; y < heightSegments; y++) {
						// we use the index array to access the correct indices
						const a = indexArray[y][x];
						const b = indexArray[y + 1][x];
						const c = indexArray[y + 1][x + 1];
						const d = indexArray[y][x + 1]; // faces

						indices.push(a, b, d);
						indices.push(b, c, d); // update group counter

						groupCount += 6;
					}
				} // add a group to the geometry. this will ensure multi material support


				scope.addGroup(groupStart, groupCount, 0); // calculate new start value for groups

				groupStart += groupCount;
			}

			function generateCap(top) {
				// save the index of the first center vertex
				const centerIndexStart = index;
				const uv = new Vector2();
				const vertex = new Vector3();
				let groupCount = 0;
				const radius = top === true ? radiusTop : radiusBottom;
				const sign = top === true ? 1 : -1; // first we generate the center vertex data of the cap.
				// because the geometry needs one set of uvs per face,
				// we must generate a center vertex per face/segment

				for (let x = 1; x <= radialSegments; x++) {
					// vertex
					vertices.push(0, halfHeight * sign, 0); // normal

					normals.push(0, sign, 0); // uv

					uvs.push(0.5, 0.5); // increase index

					index++;
				} // save the index of the last center vertex


				const centerIndexEnd = index; // now we generate the surrounding vertices, normals and uvs

				for (let x = 0; x <= radialSegments; x++) {
					const u = x / radialSegments;
					const theta = u * thetaLength + thetaStart;
					const cosTheta = Math.cos(theta);
					const sinTheta = Math.sin(theta); // vertex

					vertex.x = radius * sinTheta;
					vertex.y = halfHeight * sign;
					vertex.z = radius * cosTheta;
					vertices.push(vertex.x, vertex.y, vertex.z); // normal

					normals.push(0, sign, 0); // uv

					uv.x = cosTheta * 0.5 + 0.5;
					uv.y = sinTheta * 0.5 * sign + 0.5;
					uvs.push(uv.x, uv.y); // increase index

					index++;
				} // generate indices


				for (let x = 0; x < radialSegments; x++) {
					const c = centerIndexStart + x;
					const i = centerIndexEnd + x;

					if (top === true) {
						// face top
						indices.push(i, i + 1, c);
					} else {
						// face bottom
						indices.push(i + 1, i, c);
					}

					groupCount += 3;
				} // add a group to the geometry. this will ensure multi material support


				scope.addGroup(groupStart, groupCount, top === true ? 1 : 2); // calculate new start value for groups

				groupStart += groupCount;
			}
		}

		static fromJSON(data) {
			return new CylinderGeometry(data.radiusTop, data.radiusBottom, data.height, data.radialSegments, data.heightSegments, data.openEnded, data.thetaStart, data.thetaLength);
		}

	}

	class ConeGeometry extends CylinderGeometry {
		constructor(radius = 1, height = 1, radialSegments = 8, heightSegments = 1, openEnded = false, thetaStart = 0, thetaLength = Math.PI * 2) {
			super(0, radius, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength);
			this.type = 'ConeGeometry';
			this.parameters = {
				radius: radius,
				height: height,
				radialSegments: radialSegments,
				heightSegments: heightSegments,
				openEnded: openEnded,
				thetaStart: thetaStart,
				thetaLength: thetaLength
			};
		}

		static fromJSON(data) {
			return new ConeGeometry(data.radius, data.height, data.radialSegments, data.heightSegments, data.openEnded, data.thetaStart, data.thetaLength);
		}

	}

	class PolyhedronGeometry extends BufferGeometry {
		constructor(vertices = [], indices = [], radius = 1, detail = 0) {
			super();
			this.type = 'PolyhedronGeometry';
			this.parameters = {
				vertices: vertices,
				indices: indices,
				radius: radius,
				detail: detail
			}; // default buffer data

			const vertexBuffer = [];
			const uvBuffer = []; // the subdivision creates the vertex buffer data

			subdivide(detail); // all vertices should lie on a conceptual sphere with a given radius

			applyRadius(radius); // finally, create the uv data

			generateUVs(); // build non-indexed geometry

			this.setAttribute('position', new Float32BufferAttribute(vertexBuffer, 3));
			this.setAttribute('normal', new Float32BufferAttribute(vertexBuffer.slice(), 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvBuffer, 2));

			if (detail === 0) {
				this.computeVertexNormals(); // flat normals
			} else {
				this.normalizeNormals(); // smooth normals
			} // helper functions


			function subdivide(detail) {
				const a = new Vector3();
				const b = new Vector3();
				const c = new Vector3(); // iterate over all faces and apply a subdivison with the given detail value

				for (let i = 0; i < indices.length; i += 3) {
					// get the vertices of the face
					getVertexByIndex(indices[i + 0], a);
					getVertexByIndex(indices[i + 1], b);
					getVertexByIndex(indices[i + 2], c); // perform subdivision

					subdivideFace(a, b, c, detail);
				}
			}

			function subdivideFace(a, b, c, detail) {
				const cols = detail + 1; // we use this multidimensional array as a data structure for creating the subdivision

				const v = []; // construct all of the vertices for this subdivision

				for (let i = 0; i <= cols; i++) {
					v[i] = [];
					const aj = a.clone().lerp(c, i / cols);
					const bj = b.clone().lerp(c, i / cols);
					const rows = cols - i;

					for (let j = 0; j <= rows; j++) {
						if (j === 0 && i === cols) {
							v[i][j] = aj;
						} else {
							v[i][j] = aj.clone().lerp(bj, j / rows);
						}
					}
				} // construct all of the faces


				for (let i = 0; i < cols; i++) {
					for (let j = 0; j < 2 * (cols - i) - 1; j++) {
						const k = Math.floor(j / 2);

						if (j % 2 === 0) {
							pushVertex(v[i][k + 1]);
							pushVertex(v[i + 1][k]);
							pushVertex(v[i][k]);
						} else {
							pushVertex(v[i][k + 1]);
							pushVertex(v[i + 1][k + 1]);
							pushVertex(v[i + 1][k]);
						}
					}
				}
			}

			function applyRadius(radius) {
				const vertex = new Vector3(); // iterate over the entire buffer and apply the radius to each vertex

				for (let i = 0; i < vertexBuffer.length; i += 3) {
					vertex.x = vertexBuffer[i + 0];
					vertex.y = vertexBuffer[i + 1];
					vertex.z = vertexBuffer[i + 2];
					vertex.normalize().multiplyScalar(radius);
					vertexBuffer[i + 0] = vertex.x;
					vertexBuffer[i + 1] = vertex.y;
					vertexBuffer[i + 2] = vertex.z;
				}
			}

			function generateUVs() {
				const vertex = new Vector3();

				for (let i = 0; i < vertexBuffer.length; i += 3) {
					vertex.x = vertexBuffer[i + 0];
					vertex.y = vertexBuffer[i + 1];
					vertex.z = vertexBuffer[i + 2];
					const u = azimuth(vertex) / 2 / Math.PI + 0.5;
					const v = inclination(vertex) / Math.PI + 0.5;
					uvBuffer.push(u, 1 - v);
				}

				correctUVs();
				correctSeam();
			}

			function correctSeam() {
				// handle case when face straddles the seam, see #3269
				for (let i = 0; i < uvBuffer.length; i += 6) {
					// uv data of a single face
					const x0 = uvBuffer[i + 0];
					const x1 = uvBuffer[i + 2];
					const x2 = uvBuffer[i + 4];
					const max = Math.max(x0, x1, x2);
					const min = Math.min(x0, x1, x2); // 0.9 is somewhat arbitrary

					if (max > 0.9 && min < 0.1) {
						if (x0 < 0.2) uvBuffer[i + 0] += 1;
						if (x1 < 0.2) uvBuffer[i + 2] += 1;
						if (x2 < 0.2) uvBuffer[i + 4] += 1;
					}
				}
			}

			function pushVertex(vertex) {
				vertexBuffer.push(vertex.x, vertex.y, vertex.z);
			}

			function getVertexByIndex(index, vertex) {
				const stride = index * 3;
				vertex.x = vertices[stride + 0];
				vertex.y = vertices[stride + 1];
				vertex.z = vertices[stride + 2];
			}

			function correctUVs() {
				const a = new Vector3();
				const b = new Vector3();
				const c = new Vector3();
				const centroid = new Vector3();
				const uvA = new Vector2();
				const uvB = new Vector2();
				const uvC = new Vector2();

				for (let i = 0, j = 0; i < vertexBuffer.length; i += 9, j += 6) {
					a.set(vertexBuffer[i + 0], vertexBuffer[i + 1], vertexBuffer[i + 2]);
					b.set(vertexBuffer[i + 3], vertexBuffer[i + 4], vertexBuffer[i + 5]);
					c.set(vertexBuffer[i + 6], vertexBuffer[i + 7], vertexBuffer[i + 8]);
					uvA.set(uvBuffer[j + 0], uvBuffer[j + 1]);
					uvB.set(uvBuffer[j + 2], uvBuffer[j + 3]);
					uvC.set(uvBuffer[j + 4], uvBuffer[j + 5]);
					centroid.copy(a).add(b).add(c).divideScalar(3);
					const azi = azimuth(centroid);
					correctUV(uvA, j + 0, a, azi);
					correctUV(uvB, j + 2, b, azi);
					correctUV(uvC, j + 4, c, azi);
				}
			}

			function correctUV(uv, stride, vector, azimuth) {
				if (azimuth < 0 && uv.x === 1) {
					uvBuffer[stride] = uv.x - 1;
				}

				if (vector.x === 0 && vector.z === 0) {
					uvBuffer[stride] = azimuth / 2 / Math.PI + 0.5;
				}
			} // Angle around the Y axis, counter-clockwise when looking from above.


			function azimuth(vector) {
				return Math.atan2(vector.z, -vector.x);
			} // Angle above the XZ plane.


			function inclination(vector) {
				return Math.atan2(-vector.y, Math.sqrt(vector.x * vector.x + vector.z * vector.z));
			}
		}

		static fromJSON(data) {
			return new PolyhedronGeometry(data.vertices, data.indices, data.radius, data.details);
		}

	}

	class DodecahedronGeometry extends PolyhedronGeometry {
		constructor(radius = 1, detail = 0) {
			const t = (1 + Math.sqrt(5)) / 2;
			const r = 1 / t;
			const vertices = [// (±1, ±1, ±1)
			-1, -1, -1, -1, -1, 1, -1, 1, -1, -1, 1, 1, 1, -1, -1, 1, -1, 1, 1, 1, -1, 1, 1, 1, // (0, ±1/φ, ±φ)
			0, -r, -t, 0, -r, t, 0, r, -t, 0, r, t, // (±1/φ, ±φ, 0)
			-r, -t, 0, -r, t, 0, r, -t, 0, r, t, 0, // (±φ, 0, ±1/φ)
			-t, 0, -r, t, 0, -r, -t, 0, r, t, 0, r];
			const indices = [3, 11, 7, 3, 7, 15, 3, 15, 13, 7, 19, 17, 7, 17, 6, 7, 6, 15, 17, 4, 8, 17, 8, 10, 17, 10, 6, 8, 0, 16, 8, 16, 2, 8, 2, 10, 0, 12, 1, 0, 1, 18, 0, 18, 16, 6, 10, 2, 6, 2, 13, 6, 13, 15, 2, 16, 18, 2, 18, 3, 2, 3, 13, 18, 1, 9, 18, 9, 11, 18, 11, 3, 4, 14, 12, 4, 12, 0, 4, 0, 8, 11, 9, 5, 11, 5, 19, 11, 19, 7, 19, 5, 14, 19, 14, 4, 19, 4, 17, 1, 12, 14, 1, 14, 5, 1, 5, 9];
			super(vertices, indices, radius, detail);
			this.type = 'DodecahedronGeometry';
			this.parameters = {
				radius: radius,
				detail: detail
			};
		}

		static fromJSON(data) {
			return new DodecahedronGeometry(data.radius, data.detail);
		}

	}

	const _v0 = /*@__PURE__*/new Vector3();

	const _v1$1 = /*@__PURE__*/new Vector3();

	const _normal = /*@__PURE__*/new Vector3();

	const _triangle = /*@__PURE__*/new Triangle();

	class EdgesGeometry extends BufferGeometry {
		constructor(geometry = null, thresholdAngle = 1) {
			super();
			this.type = 'EdgesGeometry';
			this.parameters = {
				geometry: geometry,
				thresholdAngle: thresholdAngle
			};

			if (geometry !== null) {
				const precisionPoints = 4;
				const precision = Math.pow(10, precisionPoints);
				const thresholdDot = Math.cos(DEG2RAD * thresholdAngle);
				const indexAttr = geometry.getIndex();
				const positionAttr = geometry.getAttribute('position');
				const indexCount = indexAttr ? indexAttr.count : positionAttr.count;
				const indexArr = [0, 0, 0];
				const vertKeys = ['a', 'b', 'c'];
				const hashes = new Array(3);
				const edgeData = {};
				const vertices = [];

				for (let i = 0; i < indexCount; i += 3) {
					if (indexAttr) {
						indexArr[0] = indexAttr.getX(i);
						indexArr[1] = indexAttr.getX(i + 1);
						indexArr[2] = indexAttr.getX(i + 2);
					} else {
						indexArr[0] = i;
						indexArr[1] = i + 1;
						indexArr[2] = i + 2;
					}

					const {
						a,
						b,
						c
					} = _triangle;
					a.fromBufferAttribute(positionAttr, indexArr[0]);
					b.fromBufferAttribute(positionAttr, indexArr[1]);
					c.fromBufferAttribute(positionAttr, indexArr[2]);

					_triangle.getNormal(_normal); // create hashes for the edge from the vertices


					hashes[0] = `${Math.round(a.x * precision)},${Math.round(a.y * precision)},${Math.round(a.z * precision)}`;
					hashes[1] = `${Math.round(b.x * precision)},${Math.round(b.y * precision)},${Math.round(b.z * precision)}`;
					hashes[2] = `${Math.round(c.x * precision)},${Math.round(c.y * precision)},${Math.round(c.z * precision)}`; // skip degenerate triangles

					if (hashes[0] === hashes[1] || hashes[1] === hashes[2] || hashes[2] === hashes[0]) {
						continue;
					} // iterate over every edge


					for (let j = 0; j < 3; j++) {
						// get the first and next vertex making up the edge
						const jNext = (j + 1) % 3;
						const vecHash0 = hashes[j];
						const vecHash1 = hashes[jNext];
						const v0 = _triangle[vertKeys[j]];
						const v1 = _triangle[vertKeys[jNext]];
						const hash = `${vecHash0}_${vecHash1}`;
						const reverseHash = `${vecHash1}_${vecHash0}`;

						if (reverseHash in edgeData && edgeData[reverseHash]) {
							// if we found a sibling edge add it into the vertex array if
							// it meets the angle threshold and delete the edge from the map.
							if (_normal.dot(edgeData[reverseHash].normal) <= thresholdDot) {
								vertices.push(v0.x, v0.y, v0.z);
								vertices.push(v1.x, v1.y, v1.z);
							}

							edgeData[reverseHash] = null;
						} else if (!(hash in edgeData)) {
							// if we've already got an edge here then skip adding a new one
							edgeData[hash] = {
								index0: indexArr[j],
								index1: indexArr[jNext],
								normal: _normal.clone()
							};
						}
					}
				} // iterate over all remaining, unmatched edges and add them to the vertex array


				for (const key in edgeData) {
					if (edgeData[key]) {
						const {
							index0,
							index1
						} = edgeData[key];

						_v0.fromBufferAttribute(positionAttr, index0);

						_v1$1.fromBufferAttribute(positionAttr, index1);

						vertices.push(_v0.x, _v0.y, _v0.z);
						vertices.push(_v1$1.x, _v1$1.y, _v1$1.z);
					}
				}

				this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			}
		}

	}

	class Shape extends Path {
		constructor(points) {
			super(points);
			this.uuid = generateUUID();
			this.type = 'Shape';
			this.holes = [];
		}

		getPointsHoles(divisions) {
			const holesPts = [];

			for (let i = 0, l = this.holes.length; i < l; i++) {
				holesPts[i] = this.holes[i].getPoints(divisions);
			}

			return holesPts;
		} // get points of shape and holes (keypoints based on segments parameter)


		extractPoints(divisions) {
			return {
				shape: this.getPoints(divisions),
				holes: this.getPointsHoles(divisions)
			};
		}

		copy(source) {
			super.copy(source);
			this.holes = [];

			for (let i = 0, l = source.holes.length; i < l; i++) {
				const hole = source.holes[i];
				this.holes.push(hole.clone());
			}

			return this;
		}

		toJSON() {
			const data = super.toJSON();
			data.uuid = this.uuid;
			data.holes = [];

			for (let i = 0, l = this.holes.length; i < l; i++) {
				const hole = this.holes[i];
				data.holes.push(hole.toJSON());
			}

			return data;
		}

		fromJSON(json) {
			super.fromJSON(json);
			this.uuid = json.uuid;
			this.holes = [];

			for (let i = 0, l = json.holes.length; i < l; i++) {
				const hole = json.holes[i];
				this.holes.push(new Path().fromJSON(hole));
			}

			return this;
		}

	}

	/**
	 * Port from https://github.com/mapbox/earcut (v2.2.2)
	 */
	const Earcut = {
		triangulate: function (data, holeIndices, dim = 2) {
			const hasHoles = holeIndices && holeIndices.length;
			const outerLen = hasHoles ? holeIndices[0] * dim : data.length;
			let outerNode = linkedList(data, 0, outerLen, dim, true);
			const triangles = [];
			if (!outerNode || outerNode.next === outerNode.prev) return triangles;
			let minX, minY, maxX, maxY, x, y, invSize;
			if (hasHoles) outerNode = eliminateHoles(data, holeIndices, outerNode, dim); // if the shape is not too simple, we'll use z-order curve hash later; calculate polygon bbox

			if (data.length > 80 * dim) {
				minX = maxX = data[0];
				minY = maxY = data[1];

				for (let i = dim; i < outerLen; i += dim) {
					x = data[i];
					y = data[i + 1];
					if (x < minX) minX = x;
					if (y < minY) minY = y;
					if (x > maxX) maxX = x;
					if (y > maxY) maxY = y;
				} // minX, minY and invSize are later used to transform coords into integers for z-order calculation


				invSize = Math.max(maxX - minX, maxY - minY);
				invSize = invSize !== 0 ? 1 / invSize : 0;
			}

			earcutLinked(outerNode, triangles, dim, minX, minY, invSize);
			return triangles;
		}
	}; // create a circular doubly linked list from polygon points in the specified winding order

	function linkedList(data, start, end, dim, clockwise) {
		let i, last;

		if (clockwise === signedArea(data, start, end, dim) > 0) {
			for (i = start; i < end; i += dim) last = insertNode(i, data[i], data[i + 1], last);
		} else {
			for (i = end - dim; i >= start; i -= dim) last = insertNode(i, data[i], data[i + 1], last);
		}

		if (last && equals(last, last.next)) {
			removeNode(last);
			last = last.next;
		}

		return last;
	} // eliminate colinear or duplicate points


	function filterPoints(start, end) {
		if (!start) return start;
		if (!end) end = start;
		let p = start,
				again;

		do {
			again = false;

			if (!p.steiner && (equals(p, p.next) || area(p.prev, p, p.next) === 0)) {
				removeNode(p);
				p = end = p.prev;
				if (p === p.next) break;
				again = true;
			} else {
				p = p.next;
			}
		} while (again || p !== end);

		return end;
	} // main ear slicing loop which triangulates a polygon (given as a linked list)


	function earcutLinked(ear, triangles, dim, minX, minY, invSize, pass) {
		if (!ear) return; // interlink polygon nodes in z-order

		if (!pass && invSize) indexCurve(ear, minX, minY, invSize);
		let stop = ear,
				prev,
				next; // iterate through ears, slicing them one by one

		while (ear.prev !== ear.next) {
			prev = ear.prev;
			next = ear.next;

			if (invSize ? isEarHashed(ear, minX, minY, invSize) : isEar(ear)) {
				// cut off the triangle
				triangles.push(prev.i / dim);
				triangles.push(ear.i / dim);
				triangles.push(next.i / dim);
				removeNode(ear); // skipping the next vertex leads to less sliver triangles

				ear = next.next;
				stop = next.next;
				continue;
			}

			ear = next; // if we looped through the whole remaining polygon and can't find any more ears

			if (ear === stop) {
				// try filtering points and slicing again
				if (!pass) {
					earcutLinked(filterPoints(ear), triangles, dim, minX, minY, invSize, 1); // if this didn't work, try curing all small self-intersections locally
				} else if (pass === 1) {
					ear = cureLocalIntersections(filterPoints(ear), triangles, dim);
					earcutLinked(ear, triangles, dim, minX, minY, invSize, 2); // as a last resort, try splitting the remaining polygon into two
				} else if (pass === 2) {
					splitEarcut(ear, triangles, dim, minX, minY, invSize);
				}

				break;
			}
		}
	} // check whether a polygon node forms a valid ear with adjacent nodes


	function isEar(ear) {
		const a = ear.prev,
					b = ear,
					c = ear.next;
		if (area(a, b, c) >= 0) return false; // reflex, can't be an ear
		// now make sure we don't have other points inside the potential ear

		let p = ear.next.next;

		while (p !== ear.prev) {
			if (pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
			p = p.next;
		}

		return true;
	}

	function isEarHashed(ear, minX, minY, invSize) {
		const a = ear.prev,
					b = ear,
					c = ear.next;
		if (area(a, b, c) >= 0) return false; // reflex, can't be an ear
		// triangle bbox; min & max are calculated like this for speed

		const minTX = a.x < b.x ? a.x < c.x ? a.x : c.x : b.x < c.x ? b.x : c.x,
					minTY = a.y < b.y ? a.y < c.y ? a.y : c.y : b.y < c.y ? b.y : c.y,
					maxTX = a.x > b.x ? a.x > c.x ? a.x : c.x : b.x > c.x ? b.x : c.x,
					maxTY = a.y > b.y ? a.y > c.y ? a.y : c.y : b.y > c.y ? b.y : c.y; // z-order range for the current triangle bbox;

		const minZ = zOrder(minTX, minTY, minX, minY, invSize),
					maxZ = zOrder(maxTX, maxTY, minX, minY, invSize);
		let p = ear.prevZ,
				n = ear.nextZ; // look for points inside the triangle in both directions

		while (p && p.z >= minZ && n && n.z <= maxZ) {
			if (p !== ear.prev && p !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
			p = p.prevZ;
			if (n !== ear.prev && n !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y) && area(n.prev, n, n.next) >= 0) return false;
			n = n.nextZ;
		} // look for remaining points in decreasing z-order


		while (p && p.z >= minZ) {
			if (p !== ear.prev && p !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
			p = p.prevZ;
		} // look for remaining points in increasing z-order


		while (n && n.z <= maxZ) {
			if (n !== ear.prev && n !== ear.next && pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, n.x, n.y) && area(n.prev, n, n.next) >= 0) return false;
			n = n.nextZ;
		}

		return true;
	} // go through all polygon nodes and cure small local self-intersections


	function cureLocalIntersections(start, triangles, dim) {
		let p = start;

		do {
			const a = p.prev,
						b = p.next.next;

			if (!equals(a, b) && intersects(a, p, p.next, b) && locallyInside(a, b) && locallyInside(b, a)) {
				triangles.push(a.i / dim);
				triangles.push(p.i / dim);
				triangles.push(b.i / dim); // remove two nodes involved

				removeNode(p);
				removeNode(p.next);
				p = start = b;
			}

			p = p.next;
		} while (p !== start);

		return filterPoints(p);
	} // try splitting polygon into two and triangulate them independently


	function splitEarcut(start, triangles, dim, minX, minY, invSize) {
		// look for a valid diagonal that divides the polygon into two
		let a = start;

		do {
			let b = a.next.next;

			while (b !== a.prev) {
				if (a.i !== b.i && isValidDiagonal(a, b)) {
					// split the polygon in two by the diagonal
					let c = splitPolygon(a, b); // filter colinear points around the cuts

					a = filterPoints(a, a.next);
					c = filterPoints(c, c.next); // run earcut on each half

					earcutLinked(a, triangles, dim, minX, minY, invSize);
					earcutLinked(c, triangles, dim, minX, minY, invSize);
					return;
				}

				b = b.next;
			}

			a = a.next;
		} while (a !== start);
	} // link every hole into the outer loop, producing a single-ring polygon without holes


	function eliminateHoles(data, holeIndices, outerNode, dim) {
		const queue = [];
		let i, len, start, end, list;

		for (i = 0, len = holeIndices.length; i < len; i++) {
			start = holeIndices[i] * dim;
			end = i < len - 1 ? holeIndices[i + 1] * dim : data.length;
			list = linkedList(data, start, end, dim, false);
			if (list === list.next) list.steiner = true;
			queue.push(getLeftmost(list));
		}

		queue.sort(compareX); // process holes from left to right

		for (i = 0; i < queue.length; i++) {
			eliminateHole(queue[i], outerNode);
			outerNode = filterPoints(outerNode, outerNode.next);
		}

		return outerNode;
	}

	function compareX(a, b) {
		return a.x - b.x;
	} // find a bridge between vertices that connects hole with an outer ring and link it


	function eliminateHole(hole, outerNode) {
		outerNode = findHoleBridge(hole, outerNode);

		if (outerNode) {
			const b = splitPolygon(outerNode, hole); // filter collinear points around the cuts

			filterPoints(outerNode, outerNode.next);
			filterPoints(b, b.next);
		}
	} // David Eberly's algorithm for finding a bridge between hole and outer polygon


	function findHoleBridge(hole, outerNode) {
		let p = outerNode;
		const hx = hole.x;
		const hy = hole.y;
		let qx = -Infinity,
				m; // find a segment intersected by a ray from the hole's leftmost point to the left;
		// segment's endpoint with lesser x will be potential connection point

		do {
			if (hy <= p.y && hy >= p.next.y && p.next.y !== p.y) {
				const x = p.x + (hy - p.y) * (p.next.x - p.x) / (p.next.y - p.y);

				if (x <= hx && x > qx) {
					qx = x;

					if (x === hx) {
						if (hy === p.y) return p;
						if (hy === p.next.y) return p.next;
					}

					m = p.x < p.next.x ? p : p.next;
				}
			}

			p = p.next;
		} while (p !== outerNode);

		if (!m) return null;
		if (hx === qx) return m; // hole touches outer segment; pick leftmost endpoint
		// look for points inside the triangle of hole point, segment intersection and endpoint;
		// if there are no points found, we have a valid connection;
		// otherwise choose the point of the minimum angle with the ray as connection point

		const stop = m,
					mx = m.x,
					my = m.y;
		let tanMin = Infinity,
				tan;
		p = m;

		do {
			if (hx >= p.x && p.x >= mx && hx !== p.x && pointInTriangle(hy < my ? hx : qx, hy, mx, my, hy < my ? qx : hx, hy, p.x, p.y)) {
				tan = Math.abs(hy - p.y) / (hx - p.x); // tangential

				if (locallyInside(p, hole) && (tan < tanMin || tan === tanMin && (p.x > m.x || p.x === m.x && sectorContainsSector(m, p)))) {
					m = p;
					tanMin = tan;
				}
			}

			p = p.next;
		} while (p !== stop);

		return m;
	} // whether sector in vertex m contains sector in vertex p in the same coordinates


	function sectorContainsSector(m, p) {
		return area(m.prev, m, p.prev) < 0 && area(p.next, m, m.next) < 0;
	} // interlink polygon nodes in z-order


	function indexCurve(start, minX, minY, invSize) {
		let p = start;

		do {
			if (p.z === null) p.z = zOrder(p.x, p.y, minX, minY, invSize);
			p.prevZ = p.prev;
			p.nextZ = p.next;
			p = p.next;
		} while (p !== start);

		p.prevZ.nextZ = null;
		p.prevZ = null;
		sortLinked(p);
	} // Simon Tatham's linked list merge sort algorithm
	// http://www.chiark.greenend.org.uk/~sgtatham/algorithms/listsort.html


	function sortLinked(list) {
		let i,
				p,
				q,
				e,
				tail,
				numMerges,
				pSize,
				qSize,
				inSize = 1;

		do {
			p = list;
			list = null;
			tail = null;
			numMerges = 0;

			while (p) {
				numMerges++;
				q = p;
				pSize = 0;

				for (i = 0; i < inSize; i++) {
					pSize++;
					q = q.nextZ;
					if (!q) break;
				}

				qSize = inSize;

				while (pSize > 0 || qSize > 0 && q) {
					if (pSize !== 0 && (qSize === 0 || !q || p.z <= q.z)) {
						e = p;
						p = p.nextZ;
						pSize--;
					} else {
						e = q;
						q = q.nextZ;
						qSize--;
					}

					if (tail) tail.nextZ = e;else list = e;
					e.prevZ = tail;
					tail = e;
				}

				p = q;
			}

			tail.nextZ = null;
			inSize *= 2;
		} while (numMerges > 1);

		return list;
	} // z-order of a point given coords and inverse of the longer side of data bbox


	function zOrder(x, y, minX, minY, invSize) {
		// coords are transformed into non-negative 15-bit integer range
		x = 32767 * (x - minX) * invSize;
		y = 32767 * (y - minY) * invSize;
		x = (x | x << 8) & 0x00FF00FF;
		x = (x | x << 4) & 0x0F0F0F0F;
		x = (x | x << 2) & 0x33333333;
		x = (x | x << 1) & 0x55555555;
		y = (y | y << 8) & 0x00FF00FF;
		y = (y | y << 4) & 0x0F0F0F0F;
		y = (y | y << 2) & 0x33333333;
		y = (y | y << 1) & 0x55555555;
		return x | y << 1;
	} // find the leftmost node of a polygon ring


	function getLeftmost(start) {
		let p = start,
				leftmost = start;

		do {
			if (p.x < leftmost.x || p.x === leftmost.x && p.y < leftmost.y) leftmost = p;
			p = p.next;
		} while (p !== start);

		return leftmost;
	} // check if a point lies within a convex triangle


	function pointInTriangle(ax, ay, bx, by, cx, cy, px, py) {
		return (cx - px) * (ay - py) - (ax - px) * (cy - py) >= 0 && (ax - px) * (by - py) - (bx - px) * (ay - py) >= 0 && (bx - px) * (cy - py) - (cx - px) * (by - py) >= 0;
	} // check if a diagonal between two polygon nodes is valid (lies in polygon interior)


	function isValidDiagonal(a, b) {
		return a.next.i !== b.i && a.prev.i !== b.i && !intersectsPolygon(a, b) && ( // doesn't intersect other edges
		locallyInside(a, b) && locallyInside(b, a) && middleInside(a, b) && ( // locally visible
		area(a.prev, a, b.prev) || area(a, b.prev, b)) || // does not create opposite-facing sectors
		equals(a, b) && area(a.prev, a, a.next) > 0 && area(b.prev, b, b.next) > 0); // special zero-length case
	} // signed area of a triangle


	function area(p, q, r) {
		return (q.y - p.y) * (r.x - q.x) - (q.x - p.x) * (r.y - q.y);
	} // check if two points are equal


	function equals(p1, p2) {
		return p1.x === p2.x && p1.y === p2.y;
	} // check if two segments intersect


	function intersects(p1, q1, p2, q2) {
		const o1 = sign(area(p1, q1, p2));
		const o2 = sign(area(p1, q1, q2));
		const o3 = sign(area(p2, q2, p1));
		const o4 = sign(area(p2, q2, q1));
		if (o1 !== o2 && o3 !== o4) return true; // general case

		if (o1 === 0 && onSegment(p1, p2, q1)) return true; // p1, q1 and p2 are collinear and p2 lies on p1q1

		if (o2 === 0 && onSegment(p1, q2, q1)) return true; // p1, q1 and q2 are collinear and q2 lies on p1q1

		if (o3 === 0 && onSegment(p2, p1, q2)) return true; // p2, q2 and p1 are collinear and p1 lies on p2q2

		if (o4 === 0 && onSegment(p2, q1, q2)) return true; // p2, q2 and q1 are collinear and q1 lies on p2q2

		return false;
	} // for collinear points p, q, r, check if point q lies on segment pr


	function onSegment(p, q, r) {
		return q.x <= Math.max(p.x, r.x) && q.x >= Math.min(p.x, r.x) && q.y <= Math.max(p.y, r.y) && q.y >= Math.min(p.y, r.y);
	}

	function sign(num) {
		return num > 0 ? 1 : num < 0 ? -1 : 0;
	} // check if a polygon diagonal intersects any polygon segments


	function intersectsPolygon(a, b) {
		let p = a;

		do {
			if (p.i !== a.i && p.next.i !== a.i && p.i !== b.i && p.next.i !== b.i && intersects(p, p.next, a, b)) return true;
			p = p.next;
		} while (p !== a);

		return false;
	} // check if a polygon diagonal is locally inside the polygon


	function locallyInside(a, b) {
		return area(a.prev, a, a.next) < 0 ? area(a, b, a.next) >= 0 && area(a, a.prev, b) >= 0 : area(a, b, a.prev) < 0 || area(a, a.next, b) < 0;
	} // check if the middle point of a polygon diagonal is inside the polygon


	function middleInside(a, b) {
		let p = a,
				inside = false;
		const px = (a.x + b.x) / 2,
					py = (a.y + b.y) / 2;

		do {
			if (p.y > py !== p.next.y > py && p.next.y !== p.y && px < (p.next.x - p.x) * (py - p.y) / (p.next.y - p.y) + p.x) inside = !inside;
			p = p.next;
		} while (p !== a);

		return inside;
	} // link two polygon vertices with a bridge; if the vertices belong to the same ring, it splits polygon into two;
	// if one belongs to the outer ring and another to a hole, it merges it into a single ring


	function splitPolygon(a, b) {
		const a2 = new Node(a.i, a.x, a.y),
					b2 = new Node(b.i, b.x, b.y),
					an = a.next,
					bp = b.prev;
		a.next = b;
		b.prev = a;
		a2.next = an;
		an.prev = a2;
		b2.next = a2;
		a2.prev = b2;
		bp.next = b2;
		b2.prev = bp;
		return b2;
	} // create a node and optionally link it with previous one (in a circular doubly linked list)


	function insertNode(i, x, y, last) {
		const p = new Node(i, x, y);

		if (!last) {
			p.prev = p;
			p.next = p;
		} else {
			p.next = last.next;
			p.prev = last;
			last.next.prev = p;
			last.next = p;
		}

		return p;
	}

	function removeNode(p) {
		p.next.prev = p.prev;
		p.prev.next = p.next;
		if (p.prevZ) p.prevZ.nextZ = p.nextZ;
		if (p.nextZ) p.nextZ.prevZ = p.prevZ;
	}

	function Node(i, x, y) {
		// vertex index in coordinates array
		this.i = i; // vertex coordinates

		this.x = x;
		this.y = y; // previous and next vertex nodes in a polygon ring

		this.prev = null;
		this.next = null; // z-order curve value

		this.z = null; // previous and next nodes in z-order

		this.prevZ = null;
		this.nextZ = null; // indicates whether this is a steiner point

		this.steiner = false;
	}

	function signedArea(data, start, end, dim) {
		let sum = 0;

		for (let i = start, j = end - dim; i < end; i += dim) {
			sum += (data[j] - data[i]) * (data[i + 1] + data[j + 1]);
			j = i;
		}

		return sum;
	}

	class ShapeUtils {
		// calculate area of the contour polygon
		static area(contour) {
			const n = contour.length;
			let a = 0.0;

			for (let p = n - 1, q = 0; q < n; p = q++) {
				a += contour[p].x * contour[q].y - contour[q].x * contour[p].y;
			}

			return a * 0.5;
		}

		static isClockWise(pts) {
			return ShapeUtils.area(pts) < 0;
		}

		static triangulateShape(contour, holes) {
			const vertices = []; // flat array of vertices like [ x0,y0, x1,y1, x2,y2, ... ]

			const holeIndices = []; // array of hole indices

			const faces = []; // final array of vertex indices like [ [ a,b,d ], [ b,c,d ] ]

			removeDupEndPts(contour);
			addContour(vertices, contour); //

			let holeIndex = contour.length;
			holes.forEach(removeDupEndPts);

			for (let i = 0; i < holes.length; i++) {
				holeIndices.push(holeIndex);
				holeIndex += holes[i].length;
				addContour(vertices, holes[i]);
			} //


			const triangles = Earcut.triangulate(vertices, holeIndices); //

			for (let i = 0; i < triangles.length; i += 3) {
				faces.push(triangles.slice(i, i + 3));
			}

			return faces;
		}

	}

	function removeDupEndPts(points) {
		const l = points.length;

		if (l > 2 && points[l - 1].equals(points[0])) {
			points.pop();
		}
	}

	function addContour(vertices, contour) {
		for (let i = 0; i < contour.length; i++) {
			vertices.push(contour[i].x);
			vertices.push(contour[i].y);
		}
	}

	/**
	 * Creates extruded geometry from a path shape.
	 *
	 * parameters = {
	 *
	 *	curveSegments: <int>, // number of points on the curves
	 *	steps: <int>, // number of points for z-side extrusions / used for subdividing segments of extrude spline too
	 *	depth: <float>, // Depth to extrude the shape
	 *
	 *	bevelEnabled: <bool>, // turn on bevel
	 *	bevelThickness: <float>, // how deep into the original shape bevel goes
	 *	bevelSize: <float>, // how far from shape outline (including bevelOffset) is bevel
	 *	bevelOffset: <float>, // how far from shape outline does bevel start
	 *	bevelSegments: <int>, // number of bevel layers
	 *
	 *	extrudePath: <THREE.Curve> // curve to extrude shape along
	 *
	 *	UVGenerator: <Object> // object that provides UV generator functions
	 *
	 * }
	 */

	class ExtrudeGeometry extends BufferGeometry {
		constructor(shapes = new Shape([new Vector2(0.5, 0.5), new Vector2(-0.5, 0.5), new Vector2(-0.5, -0.5), new Vector2(0.5, -0.5)]), options = {}) {
			super();
			this.type = 'ExtrudeGeometry';
			this.parameters = {
				shapes: shapes,
				options: options
			};
			shapes = Array.isArray(shapes) ? shapes : [shapes];
			const scope = this;
			const verticesArray = [];
			const uvArray = [];

			for (let i = 0, l = shapes.length; i < l; i++) {
				const shape = shapes[i];
				addShape(shape);
			} // build geometry


			this.setAttribute('position', new Float32BufferAttribute(verticesArray, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvArray, 2));
			this.computeVertexNormals(); // functions

			function addShape(shape) {
				const placeholder = []; // options

				const curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;
				const steps = options.steps !== undefined ? options.steps : 1;
				const depth = options.depth !== undefined ? options.depth : 1;
				let bevelEnabled = options.bevelEnabled !== undefined ? options.bevelEnabled : true;
				let bevelThickness = options.bevelThickness !== undefined ? options.bevelThickness : 0.2;
				let bevelSize = options.bevelSize !== undefined ? options.bevelSize : bevelThickness - 0.1;
				let bevelOffset = options.bevelOffset !== undefined ? options.bevelOffset : 0;
				let bevelSegments = options.bevelSegments !== undefined ? options.bevelSegments : 3;
				const extrudePath = options.extrudePath;
				const uvgen = options.UVGenerator !== undefined ? options.UVGenerator : WorldUVGenerator; //

				let extrudePts,
						extrudeByPath = false;
				let splineTube, binormal, normal, position2;

				if (extrudePath) {
					extrudePts = extrudePath.getSpacedPoints(steps);
					extrudeByPath = true;
					bevelEnabled = false; // bevels not supported for path extrusion
					// SETUP TNB variables
					// TODO1 - have a .isClosed in spline?

					splineTube = extrudePath.computeFrenetFrames(steps, false); // console.log(splineTube, 'splineTube', splineTube.normals.length, 'steps', steps, 'extrudePts', extrudePts.length);

					binormal = new Vector3();
					normal = new Vector3();
					position2 = new Vector3();
				} // Safeguards if bevels are not enabled


				if (!bevelEnabled) {
					bevelSegments = 0;
					bevelThickness = 0;
					bevelSize = 0;
					bevelOffset = 0;
				} // Variables initialization


				const shapePoints = shape.extractPoints(curveSegments);
				let vertices = shapePoints.shape;
				const holes = shapePoints.holes;
				const reverse = !ShapeUtils.isClockWise(vertices);

				if (reverse) {
					vertices = vertices.reverse(); // Maybe we should also check if holes are in the opposite direction, just to be safe ...

					for (let h = 0, hl = holes.length; h < hl; h++) {
						const ahole = holes[h];

						if (ShapeUtils.isClockWise(ahole)) {
							holes[h] = ahole.reverse();
						}
					}
				}

				const faces = ShapeUtils.triangulateShape(vertices, holes);
				/* Vertices */

				const contour = vertices; // vertices has all points but contour has only points of circumference

				for (let h = 0, hl = holes.length; h < hl; h++) {
					const ahole = holes[h];
					vertices = vertices.concat(ahole);
				}

				function scalePt2(pt, vec, size) {
					if (!vec) console.error('THREE.ExtrudeGeometry: vec does not exist');
					return vec.clone().multiplyScalar(size).add(pt);
				}

				const vlen = vertices.length,
							flen = faces.length; // Find directions for point movement

				function getBevelVec(inPt, inPrev, inNext) {
					// computes for inPt the corresponding point inPt' on a new contour
					//	 shifted by 1 unit (length of normalized vector) to the left
					// if we walk along contour clockwise, this new contour is outside the old one
					//
					// inPt' is the intersection of the two lines parallel to the two
					//	adjacent edges of inPt at a distance of 1 unit on the left side.
					let v_trans_x, v_trans_y, shrink_by; // resulting translation vector for inPt
					// good reading for geometry algorithms (here: line-line intersection)
					// http://geomalgorithms.com/a05-_intersect-1.html

					const v_prev_x = inPt.x - inPrev.x,
								v_prev_y = inPt.y - inPrev.y;
					const v_next_x = inNext.x - inPt.x,
								v_next_y = inNext.y - inPt.y;
					const v_prev_lensq = v_prev_x * v_prev_x + v_prev_y * v_prev_y; // check for collinear edges

					const collinear0 = v_prev_x * v_next_y - v_prev_y * v_next_x;

					if (Math.abs(collinear0) > Number.EPSILON) {
						// not collinear
						// length of vectors for normalizing
						const v_prev_len = Math.sqrt(v_prev_lensq);
						const v_next_len = Math.sqrt(v_next_x * v_next_x + v_next_y * v_next_y); // shift adjacent points by unit vectors to the left

						const ptPrevShift_x = inPrev.x - v_prev_y / v_prev_len;
						const ptPrevShift_y = inPrev.y + v_prev_x / v_prev_len;
						const ptNextShift_x = inNext.x - v_next_y / v_next_len;
						const ptNextShift_y = inNext.y + v_next_x / v_next_len; // scaling factor for v_prev to intersection point

						const sf = ((ptNextShift_x - ptPrevShift_x) * v_next_y - (ptNextShift_y - ptPrevShift_y) * v_next_x) / (v_prev_x * v_next_y - v_prev_y * v_next_x); // vector from inPt to intersection point

						v_trans_x = ptPrevShift_x + v_prev_x * sf - inPt.x;
						v_trans_y = ptPrevShift_y + v_prev_y * sf - inPt.y; // Don't normalize!, otherwise sharp corners become ugly
						//	but prevent crazy spikes

						const v_trans_lensq = v_trans_x * v_trans_x + v_trans_y * v_trans_y;

						if (v_trans_lensq <= 2) {
							return new Vector2(v_trans_x, v_trans_y);
						} else {
							shrink_by = Math.sqrt(v_trans_lensq / 2);
						}
					} else {
						// handle special case of collinear edges
						let direction_eq = false; // assumes: opposite

						if (v_prev_x > Number.EPSILON) {
							if (v_next_x > Number.EPSILON) {
								direction_eq = true;
							}
						} else {
							if (v_prev_x < -Number.EPSILON) {
								if (v_next_x < -Number.EPSILON) {
									direction_eq = true;
								}
							} else {
								if (Math.sign(v_prev_y) === Math.sign(v_next_y)) {
									direction_eq = true;
								}
							}
						}

						if (direction_eq) {
							// console.log("Warning: lines are a straight sequence");
							v_trans_x = -v_prev_y;
							v_trans_y = v_prev_x;
							shrink_by = Math.sqrt(v_prev_lensq);
						} else {
							// console.log("Warning: lines are a straight spike");
							v_trans_x = v_prev_x;
							v_trans_y = v_prev_y;
							shrink_by = Math.sqrt(v_prev_lensq / 2);
						}
					}

					return new Vector2(v_trans_x / shrink_by, v_trans_y / shrink_by);
				}

				const contourMovements = [];

				for (let i = 0, il = contour.length, j = il - 1, k = i + 1; i < il; i++, j++, k++) {
					if (j === il) j = 0;
					if (k === il) k = 0; //	(j)---(i)---(k)
					// console.log('i,j,k', i, j , k)

					contourMovements[i] = getBevelVec(contour[i], contour[j], contour[k]);
				}

				const holesMovements = [];
				let oneHoleMovements,
						verticesMovements = contourMovements.concat();

				for (let h = 0, hl = holes.length; h < hl; h++) {
					const ahole = holes[h];
					oneHoleMovements = [];

					for (let i = 0, il = ahole.length, j = il - 1, k = i + 1; i < il; i++, j++, k++) {
						if (j === il) j = 0;
						if (k === il) k = 0; //	(j)---(i)---(k)

						oneHoleMovements[i] = getBevelVec(ahole[i], ahole[j], ahole[k]);
					}

					holesMovements.push(oneHoleMovements);
					verticesMovements = verticesMovements.concat(oneHoleMovements);
				} // Loop bevelSegments, 1 for the front, 1 for the back


				for (let b = 0; b < bevelSegments; b++) {
					//for ( b = bevelSegments; b > 0; b -- ) {
					const t = b / bevelSegments;
					const z = bevelThickness * Math.cos(t * Math.PI / 2);
					const bs = bevelSize * Math.sin(t * Math.PI / 2) + bevelOffset; // contract shape

					for (let i = 0, il = contour.length; i < il; i++) {
						const vert = scalePt2(contour[i], contourMovements[i], bs);
						v(vert.x, vert.y, -z);
					} // expand holes


					for (let h = 0, hl = holes.length; h < hl; h++) {
						const ahole = holes[h];
						oneHoleMovements = holesMovements[h];

						for (let i = 0, il = ahole.length; i < il; i++) {
							const vert = scalePt2(ahole[i], oneHoleMovements[i], bs);
							v(vert.x, vert.y, -z);
						}
					}
				}

				const bs = bevelSize + bevelOffset; // Back facing vertices

				for (let i = 0; i < vlen; i++) {
					const vert = bevelEnabled ? scalePt2(vertices[i], verticesMovements[i], bs) : vertices[i];

					if (!extrudeByPath) {
						v(vert.x, vert.y, 0);
					} else {
						// v( vert.x, vert.y + extrudePts[ 0 ].y, extrudePts[ 0 ].x );
						normal.copy(splineTube.normals[0]).multiplyScalar(vert.x);
						binormal.copy(splineTube.binormals[0]).multiplyScalar(vert.y);
						position2.copy(extrudePts[0]).add(normal).add(binormal);
						v(position2.x, position2.y, position2.z);
					}
				} // Add stepped vertices...
				// Including front facing vertices


				for (let s = 1; s <= steps; s++) {
					for (let i = 0; i < vlen; i++) {
						const vert = bevelEnabled ? scalePt2(vertices[i], verticesMovements[i], bs) : vertices[i];

						if (!extrudeByPath) {
							v(vert.x, vert.y, depth / steps * s);
						} else {
							// v( vert.x, vert.y + extrudePts[ s - 1 ].y, extrudePts[ s - 1 ].x );
							normal.copy(splineTube.normals[s]).multiplyScalar(vert.x);
							binormal.copy(splineTube.binormals[s]).multiplyScalar(vert.y);
							position2.copy(extrudePts[s]).add(normal).add(binormal);
							v(position2.x, position2.y, position2.z);
						}
					}
				} // Add bevel segments planes
				//for ( b = 1; b <= bevelSegments; b ++ ) {


				for (let b = bevelSegments - 1; b >= 0; b--) {
					const t = b / bevelSegments;
					const z = bevelThickness * Math.cos(t * Math.PI / 2);
					const bs = bevelSize * Math.sin(t * Math.PI / 2) + bevelOffset; // contract shape

					for (let i = 0, il = contour.length; i < il; i++) {
						const vert = scalePt2(contour[i], contourMovements[i], bs);
						v(vert.x, vert.y, depth + z);
					} // expand holes


					for (let h = 0, hl = holes.length; h < hl; h++) {
						const ahole = holes[h];
						oneHoleMovements = holesMovements[h];

						for (let i = 0, il = ahole.length; i < il; i++) {
							const vert = scalePt2(ahole[i], oneHoleMovements[i], bs);

							if (!extrudeByPath) {
								v(vert.x, vert.y, depth + z);
							} else {
								v(vert.x, vert.y + extrudePts[steps - 1].y, extrudePts[steps - 1].x + z);
							}
						}
					}
				}
				/* Faces */
				// Top and bottom faces


				buildLidFaces(); // Sides faces

				buildSideFaces(); /////	Internal functions

				function buildLidFaces() {
					const start = verticesArray.length / 3;

					if (bevelEnabled) {
						let layer = 0; // steps + 1

						let offset = vlen * layer; // Bottom faces

						for (let i = 0; i < flen; i++) {
							const face = faces[i];
							f3(face[2] + offset, face[1] + offset, face[0] + offset);
						}

						layer = steps + bevelSegments * 2;
						offset = vlen * layer; // Top faces

						for (let i = 0; i < flen; i++) {
							const face = faces[i];
							f3(face[0] + offset, face[1] + offset, face[2] + offset);
						}
					} else {
						// Bottom faces
						for (let i = 0; i < flen; i++) {
							const face = faces[i];
							f3(face[2], face[1], face[0]);
						} // Top faces


						for (let i = 0; i < flen; i++) {
							const face = faces[i];
							f3(face[0] + vlen * steps, face[1] + vlen * steps, face[2] + vlen * steps);
						}
					}

					scope.addGroup(start, verticesArray.length / 3 - start, 0);
				} // Create faces for the z-sides of the shape


				function buildSideFaces() {
					const start = verticesArray.length / 3;
					let layeroffset = 0;
					sidewalls(contour, layeroffset);
					layeroffset += contour.length;

					for (let h = 0, hl = holes.length; h < hl; h++) {
						const ahole = holes[h];
						sidewalls(ahole, layeroffset); //, true

						layeroffset += ahole.length;
					}

					scope.addGroup(start, verticesArray.length / 3 - start, 1);
				}

				function sidewalls(contour, layeroffset) {
					let i = contour.length;

					while (--i >= 0) {
						const j = i;
						let k = i - 1;
						if (k < 0) k = contour.length - 1; //console.log('b', i,j, i-1, k,vertices.length);

						for (let s = 0, sl = steps + bevelSegments * 2; s < sl; s++) {
							const slen1 = vlen * s;
							const slen2 = vlen * (s + 1);
							const a = layeroffset + j + slen1,
										b = layeroffset + k + slen1,
										c = layeroffset + k + slen2,
										d = layeroffset + j + slen2;
							f4(a, b, c, d);
						}
					}
				}

				function v(x, y, z) {
					placeholder.push(x);
					placeholder.push(y);
					placeholder.push(z);
				}

				function f3(a, b, c) {
					addVertex(a);
					addVertex(b);
					addVertex(c);
					const nextIndex = verticesArray.length / 3;
					const uvs = uvgen.generateTopUV(scope, verticesArray, nextIndex - 3, nextIndex - 2, nextIndex - 1);
					addUV(uvs[0]);
					addUV(uvs[1]);
					addUV(uvs[2]);
				}

				function f4(a, b, c, d) {
					addVertex(a);
					addVertex(b);
					addVertex(d);
					addVertex(b);
					addVertex(c);
					addVertex(d);
					const nextIndex = verticesArray.length / 3;
					const uvs = uvgen.generateSideWallUV(scope, verticesArray, nextIndex - 6, nextIndex - 3, nextIndex - 2, nextIndex - 1);
					addUV(uvs[0]);
					addUV(uvs[1]);
					addUV(uvs[3]);
					addUV(uvs[1]);
					addUV(uvs[2]);
					addUV(uvs[3]);
				}

				function addVertex(index) {
					verticesArray.push(placeholder[index * 3 + 0]);
					verticesArray.push(placeholder[index * 3 + 1]);
					verticesArray.push(placeholder[index * 3 + 2]);
				}

				function addUV(vector2) {
					uvArray.push(vector2.x);
					uvArray.push(vector2.y);
				}
			}
		}

		toJSON() {
			const data = super.toJSON();
			const shapes = this.parameters.shapes;
			const options = this.parameters.options;
			return toJSON$1(shapes, options, data);
		}

		static fromJSON(data, shapes) {
			const geometryShapes = [];

			for (let j = 0, jl = data.shapes.length; j < jl; j++) {
				const shape = shapes[data.shapes[j]];
				geometryShapes.push(shape);
			}

			const extrudePath = data.options.extrudePath;

			if (extrudePath !== undefined) {
				data.options.extrudePath = new Curves[extrudePath.type]().fromJSON(extrudePath);
			}

			return new ExtrudeGeometry(geometryShapes, data.options);
		}

	}

	const WorldUVGenerator = {
		generateTopUV: function (geometry, vertices, indexA, indexB, indexC) {
			const a_x = vertices[indexA * 3];
			const a_y = vertices[indexA * 3 + 1];
			const b_x = vertices[indexB * 3];
			const b_y = vertices[indexB * 3 + 1];
			const c_x = vertices[indexC * 3];
			const c_y = vertices[indexC * 3 + 1];
			return [new Vector2(a_x, a_y), new Vector2(b_x, b_y), new Vector2(c_x, c_y)];
		},
		generateSideWallUV: function (geometry, vertices, indexA, indexB, indexC, indexD) {
			const a_x = vertices[indexA * 3];
			const a_y = vertices[indexA * 3 + 1];
			const a_z = vertices[indexA * 3 + 2];
			const b_x = vertices[indexB * 3];
			const b_y = vertices[indexB * 3 + 1];
			const b_z = vertices[indexB * 3 + 2];
			const c_x = vertices[indexC * 3];
			const c_y = vertices[indexC * 3 + 1];
			const c_z = vertices[indexC * 3 + 2];
			const d_x = vertices[indexD * 3];
			const d_y = vertices[indexD * 3 + 1];
			const d_z = vertices[indexD * 3 + 2];

			if (Math.abs(a_y - b_y) < Math.abs(a_x - b_x)) {
				return [new Vector2(a_x, 1 - a_z), new Vector2(b_x, 1 - b_z), new Vector2(c_x, 1 - c_z), new Vector2(d_x, 1 - d_z)];
			} else {
				return [new Vector2(a_y, 1 - a_z), new Vector2(b_y, 1 - b_z), new Vector2(c_y, 1 - c_z), new Vector2(d_y, 1 - d_z)];
			}
		}
	};

	function toJSON$1(shapes, options, data) {
		data.shapes = [];

		if (Array.isArray(shapes)) {
			for (let i = 0, l = shapes.length; i < l; i++) {
				const shape = shapes[i];
				data.shapes.push(shape.uuid);
			}
		} else {
			data.shapes.push(shapes.uuid);
		}

		data.options = Object.assign({}, options);
		if (options.extrudePath !== undefined) data.options.extrudePath = options.extrudePath.toJSON();
		return data;
	}

	class IcosahedronGeometry extends PolyhedronGeometry {
		constructor(radius = 1, detail = 0) {
			const t = (1 + Math.sqrt(5)) / 2;
			const vertices = [-1, t, 0, 1, t, 0, -1, -t, 0, 1, -t, 0, 0, -1, t, 0, 1, t, 0, -1, -t, 0, 1, -t, t, 0, -1, t, 0, 1, -t, 0, -1, -t, 0, 1];
			const indices = [0, 11, 5, 0, 5, 1, 0, 1, 7, 0, 7, 10, 0, 10, 11, 1, 5, 9, 5, 11, 4, 11, 10, 2, 10, 7, 6, 7, 1, 8, 3, 9, 4, 3, 4, 2, 3, 2, 6, 3, 6, 8, 3, 8, 9, 4, 9, 5, 2, 4, 11, 6, 2, 10, 8, 6, 7, 9, 8, 1];
			super(vertices, indices, radius, detail);
			this.type = 'IcosahedronGeometry';
			this.parameters = {
				radius: radius,
				detail: detail
			};
		}

		static fromJSON(data) {
			return new IcosahedronGeometry(data.radius, data.detail);
		}

	}

	class OctahedronGeometry extends PolyhedronGeometry {
		constructor(radius = 1, detail = 0) {
			const vertices = [1, 0, 0, -1, 0, 0, 0, 1, 0, 0, -1, 0, 0, 0, 1, 0, 0, -1];
			const indices = [0, 2, 4, 0, 4, 3, 0, 3, 5, 0, 5, 2, 1, 2, 5, 1, 5, 3, 1, 3, 4, 1, 4, 2];
			super(vertices, indices, radius, detail);
			this.type = 'OctahedronGeometry';
			this.parameters = {
				radius: radius,
				detail: detail
			};
		}

		static fromJSON(data) {
			return new OctahedronGeometry(data.radius, data.detail);
		}

	}

	class RingGeometry extends BufferGeometry {
		constructor(innerRadius = 0.5, outerRadius = 1, thetaSegments = 8, phiSegments = 1, thetaStart = 0, thetaLength = Math.PI * 2) {
			super();
			this.type = 'RingGeometry';
			this.parameters = {
				innerRadius: innerRadius,
				outerRadius: outerRadius,
				thetaSegments: thetaSegments,
				phiSegments: phiSegments,
				thetaStart: thetaStart,
				thetaLength: thetaLength
			};
			thetaSegments = Math.max(3, thetaSegments);
			phiSegments = Math.max(1, phiSegments); // buffers

			const indices = [];
			const vertices = [];
			const normals = [];
			const uvs = []; // some helper variables

			let radius = innerRadius;
			const radiusStep = (outerRadius - innerRadius) / phiSegments;
			const vertex = new Vector3();
			const uv = new Vector2(); // generate vertices, normals and uvs

			for (let j = 0; j <= phiSegments; j++) {
				for (let i = 0; i <= thetaSegments; i++) {
					// values are generate from the inside of the ring to the outside
					const segment = thetaStart + i / thetaSegments * thetaLength; // vertex

					vertex.x = radius * Math.cos(segment);
					vertex.y = radius * Math.sin(segment);
					vertices.push(vertex.x, vertex.y, vertex.z); // normal

					normals.push(0, 0, 1); // uv

					uv.x = (vertex.x / outerRadius + 1) / 2;
					uv.y = (vertex.y / outerRadius + 1) / 2;
					uvs.push(uv.x, uv.y);
				} // increase the radius for next row of vertices


				radius += radiusStep;
			} // indices


			for (let j = 0; j < phiSegments; j++) {
				const thetaSegmentLevel = j * (thetaSegments + 1);

				for (let i = 0; i < thetaSegments; i++) {
					const segment = i + thetaSegmentLevel;
					const a = segment;
					const b = segment + thetaSegments + 1;
					const c = segment + thetaSegments + 2;
					const d = segment + 1; // faces

					indices.push(a, b, d);
					indices.push(b, c, d);
				}
			} // build geometry


			this.setIndex(indices);
			this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));
		}

		static fromJSON(data) {
			return new RingGeometry(data.innerRadius, data.outerRadius, data.thetaSegments, data.phiSegments, data.thetaStart, data.thetaLength);
		}

	}

	class ShapeGeometry extends BufferGeometry {
		constructor(shapes = new Shape([new Vector2(0, 0.5), new Vector2(-0.5, -0.5), new Vector2(0.5, -0.5)]), curveSegments = 12) {
			super();
			this.type = 'ShapeGeometry';
			this.parameters = {
				shapes: shapes,
				curveSegments: curveSegments
			}; // buffers

			const indices = [];
			const vertices = [];
			const normals = [];
			const uvs = []; // helper variables

			let groupStart = 0;
			let groupCount = 0; // allow single and array values for "shapes" parameter

			if (Array.isArray(shapes) === false) {
				addShape(shapes);
			} else {
				for (let i = 0; i < shapes.length; i++) {
					addShape(shapes[i]);
					this.addGroup(groupStart, groupCount, i); // enables MultiMaterial support

					groupStart += groupCount;
					groupCount = 0;
				}
			} // build geometry


			this.setIndex(indices);
			this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvs, 2)); // helper functions

			function addShape(shape) {
				const indexOffset = vertices.length / 3;
				const points = shape.extractPoints(curveSegments);
				let shapeVertices = points.shape;
				const shapeHoles = points.holes; // check direction of vertices

				if (ShapeUtils.isClockWise(shapeVertices) === false) {
					shapeVertices = shapeVertices.reverse();
				}

				for (let i = 0, l = shapeHoles.length; i < l; i++) {
					const shapeHole = shapeHoles[i];

					if (ShapeUtils.isClockWise(shapeHole) === true) {
						shapeHoles[i] = shapeHole.reverse();
					}
				}

				const faces = ShapeUtils.triangulateShape(shapeVertices, shapeHoles); // join vertices of inner and outer paths to a single array

				for (let i = 0, l = shapeHoles.length; i < l; i++) {
					const shapeHole = shapeHoles[i];
					shapeVertices = shapeVertices.concat(shapeHole);
				} // vertices, normals, uvs


				for (let i = 0, l = shapeVertices.length; i < l; i++) {
					const vertex = shapeVertices[i];
					vertices.push(vertex.x, vertex.y, 0);
					normals.push(0, 0, 1);
					uvs.push(vertex.x, vertex.y); // world uvs
				} // incides


				for (let i = 0, l = faces.length; i < l; i++) {
					const face = faces[i];
					const a = face[0] + indexOffset;
					const b = face[1] + indexOffset;
					const c = face[2] + indexOffset;
					indices.push(a, b, c);
					groupCount += 3;
				}
			}
		}

		toJSON() {
			const data = super.toJSON();
			const shapes = this.parameters.shapes;
			return toJSON(shapes, data);
		}

		static fromJSON(data, shapes) {
			const geometryShapes = [];

			for (let j = 0, jl = data.shapes.length; j < jl; j++) {
				const shape = shapes[data.shapes[j]];
				geometryShapes.push(shape);
			}

			return new ShapeGeometry(geometryShapes, data.curveSegments);
		}

	}

	function toJSON(shapes, data) {
		data.shapes = [];

		if (Array.isArray(shapes)) {
			for (let i = 0, l = shapes.length; i < l; i++) {
				const shape = shapes[i];
				data.shapes.push(shape.uuid);
			}
		} else {
			data.shapes.push(shapes.uuid);
		}

		return data;
	}

	class SphereGeometry extends BufferGeometry {
		constructor(radius = 1, widthSegments = 32, heightSegments = 16, phiStart = 0, phiLength = Math.PI * 2, thetaStart = 0, thetaLength = Math.PI) {
			super();
			this.type = 'SphereGeometry';
			this.parameters = {
				radius: radius,
				widthSegments: widthSegments,
				heightSegments: heightSegments,
				phiStart: phiStart,
				phiLength: phiLength,
				thetaStart: thetaStart,
				thetaLength: thetaLength
			};
			widthSegments = Math.max(3, Math.floor(widthSegments));
			heightSegments = Math.max(2, Math.floor(heightSegments));
			const thetaEnd = Math.min(thetaStart + thetaLength, Math.PI);
			let index = 0;
			const grid = [];
			const vertex = new Vector3();
			const normal = new Vector3(); // buffers

			const indices = [];
			const vertices = [];
			const normals = [];
			const uvs = []; // generate vertices, normals and uvs

			for (let iy = 0; iy <= heightSegments; iy++) {
				const verticesRow = [];
				const v = iy / heightSegments; // special case for the poles

				let uOffset = 0;

				if (iy == 0 && thetaStart == 0) {
					uOffset = 0.5 / widthSegments;
				} else if (iy == heightSegments && thetaEnd == Math.PI) {
					uOffset = -0.5 / widthSegments;
				}

				for (let ix = 0; ix <= widthSegments; ix++) {
					const u = ix / widthSegments; // vertex

					vertex.x = -radius * Math.cos(phiStart + u * phiLength) * Math.sin(thetaStart + v * thetaLength);
					vertex.y = radius * Math.cos(thetaStart + v * thetaLength);
					vertex.z = radius * Math.sin(phiStart + u * phiLength) * Math.sin(thetaStart + v * thetaLength);
					vertices.push(vertex.x, vertex.y, vertex.z); // normal

					normal.copy(vertex).normalize();
					normals.push(normal.x, normal.y, normal.z); // uv

					uvs.push(u + uOffset, 1 - v);
					verticesRow.push(index++);
				}

				grid.push(verticesRow);
			} // indices


			for (let iy = 0; iy < heightSegments; iy++) {
				for (let ix = 0; ix < widthSegments; ix++) {
					const a = grid[iy][ix + 1];
					const b = grid[iy][ix];
					const c = grid[iy + 1][ix];
					const d = grid[iy + 1][ix + 1];
					if (iy !== 0 || thetaStart > 0) indices.push(a, b, d);
					if (iy !== heightSegments - 1 || thetaEnd < Math.PI) indices.push(b, c, d);
				}
			} // build geometry


			this.setIndex(indices);
			this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));
		}

		static fromJSON(data) {
			return new SphereGeometry(data.radius, data.widthSegments, data.heightSegments, data.phiStart, data.phiLength, data.thetaStart, data.thetaLength);
		}

	}

	class TetrahedronGeometry extends PolyhedronGeometry {
		constructor(radius = 1, detail = 0) {
			const vertices = [1, 1, 1, -1, -1, 1, -1, 1, -1, 1, -1, -1];
			const indices = [2, 1, 0, 0, 3, 2, 1, 3, 0, 2, 3, 1];
			super(vertices, indices, radius, detail);
			this.type = 'TetrahedronGeometry';
			this.parameters = {
				radius: radius,
				detail: detail
			};
		}

		static fromJSON(data) {
			return new TetrahedronGeometry(data.radius, data.detail);
		}

	}

	class TorusGeometry extends BufferGeometry {
		constructor(radius = 1, tube = 0.4, radialSegments = 8, tubularSegments = 6, arc = Math.PI * 2) {
			super();
			this.type = 'TorusGeometry';
			this.parameters = {
				radius: radius,
				tube: tube,
				radialSegments: radialSegments,
				tubularSegments: tubularSegments,
				arc: arc
			};
			radialSegments = Math.floor(radialSegments);
			tubularSegments = Math.floor(tubularSegments); // buffers

			const indices = [];
			const vertices = [];
			const normals = [];
			const uvs = []; // helper variables

			const center = new Vector3();
			const vertex = new Vector3();
			const normal = new Vector3(); // generate vertices, normals and uvs

			for (let j = 0; j <= radialSegments; j++) {
				for (let i = 0; i <= tubularSegments; i++) {
					const u = i / tubularSegments * arc;
					const v = j / radialSegments * Math.PI * 2; // vertex

					vertex.x = (radius + tube * Math.cos(v)) * Math.cos(u);
					vertex.y = (radius + tube * Math.cos(v)) * Math.sin(u);
					vertex.z = tube * Math.sin(v);
					vertices.push(vertex.x, vertex.y, vertex.z); // normal

					center.x = radius * Math.cos(u);
					center.y = radius * Math.sin(u);
					normal.subVectors(vertex, center).normalize();
					normals.push(normal.x, normal.y, normal.z); // uv

					uvs.push(i / tubularSegments);
					uvs.push(j / radialSegments);
				}
			} // generate indices


			for (let j = 1; j <= radialSegments; j++) {
				for (let i = 1; i <= tubularSegments; i++) {
					// indices
					const a = (tubularSegments + 1) * j + i - 1;
					const b = (tubularSegments + 1) * (j - 1) + i - 1;
					const c = (tubularSegments + 1) * (j - 1) + i;
					const d = (tubularSegments + 1) * j + i; // faces

					indices.push(a, b, d);
					indices.push(b, c, d);
				}
			} // build geometry


			this.setIndex(indices);
			this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvs, 2));
		}

		static fromJSON(data) {
			return new TorusGeometry(data.radius, data.tube, data.radialSegments, data.tubularSegments, data.arc);
		}

	}

	class TorusKnotGeometry extends BufferGeometry {
		constructor(radius = 1, tube = 0.4, tubularSegments = 64, radialSegments = 8, p = 2, q = 3) {
			super();
			this.type = 'TorusKnotGeometry';
			this.parameters = {
				radius: radius,
				tube: tube,
				tubularSegments: tubularSegments,
				radialSegments: radialSegments,
				p: p,
				q: q
			};
			tubularSegments = Math.floor(tubularSegments);
			radialSegments = Math.floor(radialSegments); // buffers

			const indices = [];
			const vertices = [];
			const normals = [];
			const uvs = []; // helper variables

			const vertex = new Vector3();
			const normal = new Vector3();
			const P1 = new Vector3();
			const P2 = new Vector3();
			const B = new Vector3();
			const T = new Vector3();
			const N = new Vector3(); // generate vertices, normals and uvs

			for (let i = 0; i <= tubularSegments; ++i) {
				// the radian "u" is used to calculate the position on the torus curve of the current tubular segment
				const u = i / tubularSegments * p * Math.PI * 2; // now we calculate two points. P1 is our current position on the curve, P2 is a little farther ahead.
				// these points are used to create a special "coordinate space", which is necessary to calculate the correct vertex positions

				calculatePositionOnCurve(u, p, q, radius, P1);
				calculatePositionOnCurve(u + 0.01, p, q, radius, P2); // calculate orthonormal basis

				T.subVectors(P2, P1);
				N.addVectors(P2, P1);
				B.crossVectors(T, N);
				N.crossVectors(B, T); // normalize B, N. T can be ignored, we don't use it

				B.normalize();
				N.normalize();

				for (let j = 0; j <= radialSegments; ++j) {
					// now calculate the vertices. they are nothing more than an extrusion of the torus curve.
					// because we extrude a shape in the xy-plane, there is no need to calculate a z-value.
					const v = j / radialSegments * Math.PI * 2;
					const cx = -tube * Math.cos(v);
					const cy = tube * Math.sin(v); // now calculate the final vertex position.
					// first we orient the extrusion with our basis vectors, then we add it to the current position on the curve

					vertex.x = P1.x + (cx * N.x + cy * B.x);
					vertex.y = P1.y + (cx * N.y + cy * B.y);
					vertex.z = P1.z + (cx * N.z + cy * B.z);
					vertices.push(vertex.x, vertex.y, vertex.z); // normal (P1 is always the center/origin of the extrusion, thus we can use it to calculate the normal)

					normal.subVectors(vertex, P1).normalize();
					normals.push(normal.x, normal.y, normal.z); // uv

					uvs.push(i / tubularSegments);
					uvs.push(j / radialSegments);
				}
			} // generate indices


			for (let j = 1; j <= tubularSegments; j++) {
				for (let i = 1; i <= radialSegments; i++) {
					// indices
					const a = (radialSegments + 1) * (j - 1) + (i - 1);
					const b = (radialSegments + 1) * j + (i - 1);
					const c = (radialSegments + 1) * j + i;
					const d = (radialSegments + 1) * (j - 1) + i; // faces

					indices.push(a, b, d);
					indices.push(b, c, d);
				}
			} // build geometry


			this.setIndex(indices);
			this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvs, 2)); // this function calculates the current position on the torus curve

			function calculatePositionOnCurve(u, p, q, radius, position) {
				const cu = Math.cos(u);
				const su = Math.sin(u);
				const quOverP = q / p * u;
				const cs = Math.cos(quOverP);
				position.x = radius * (2 + cs) * 0.5 * cu;
				position.y = radius * (2 + cs) * su * 0.5;
				position.z = radius * Math.sin(quOverP) * 0.5;
			}
		}

		static fromJSON(data) {
			return new TorusKnotGeometry(data.radius, data.tube, data.tubularSegments, data.radialSegments, data.p, data.q);
		}

	}

	class TubeGeometry extends BufferGeometry {
		constructor(path = new QuadraticBezierCurve3(new Vector3(-1, -1, 0), new Vector3(-1, 1, 0), new Vector3(1, 1, 0)), tubularSegments = 64, radius = 1, radialSegments = 8, closed = false) {
			super();
			this.type = 'TubeGeometry';
			this.parameters = {
				path: path,
				tubularSegments: tubularSegments,
				radius: radius,
				radialSegments: radialSegments,
				closed: closed
			};
			const frames = path.computeFrenetFrames(tubularSegments, closed); // expose internals

			this.tangents = frames.tangents;
			this.normals = frames.normals;
			this.binormals = frames.binormals; // helper variables

			const vertex = new Vector3();
			const normal = new Vector3();
			const uv = new Vector2();
			let P = new Vector3(); // buffer

			const vertices = [];
			const normals = [];
			const uvs = [];
			const indices = []; // create buffer data

			generateBufferData(); // build geometry

			this.setIndex(indices);
			this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			this.setAttribute('normal', new Float32BufferAttribute(normals, 3));
			this.setAttribute('uv', new Float32BufferAttribute(uvs, 2)); // functions

			function generateBufferData() {
				for (let i = 0; i < tubularSegments; i++) {
					generateSegment(i);
				} // if the geometry is not closed, generate the last row of vertices and normals
				// at the regular position on the given path
				//
				// if the geometry is closed, duplicate the first row of vertices and normals (uvs will differ)


				generateSegment(closed === false ? tubularSegments : 0); // uvs are generated in a separate function.
				// this makes it easy compute correct values for closed geometries

				generateUVs(); // finally create faces

				generateIndices();
			}

			function generateSegment(i) {
				// we use getPointAt to sample evenly distributed points from the given path
				P = path.getPointAt(i / tubularSegments, P); // retrieve corresponding normal and binormal

				const N = frames.normals[i];
				const B = frames.binormals[i]; // generate normals and vertices for the current segment

				for (let j = 0; j <= radialSegments; j++) {
					const v = j / radialSegments * Math.PI * 2;
					const sin = Math.sin(v);
					const cos = -Math.cos(v); // normal

					normal.x = cos * N.x + sin * B.x;
					normal.y = cos * N.y + sin * B.y;
					normal.z = cos * N.z + sin * B.z;
					normal.normalize();
					normals.push(normal.x, normal.y, normal.z); // vertex

					vertex.x = P.x + radius * normal.x;
					vertex.y = P.y + radius * normal.y;
					vertex.z = P.z + radius * normal.z;
					vertices.push(vertex.x, vertex.y, vertex.z);
				}
			}

			function generateIndices() {
				for (let j = 1; j <= tubularSegments; j++) {
					for (let i = 1; i <= radialSegments; i++) {
						const a = (radialSegments + 1) * (j - 1) + (i - 1);
						const b = (radialSegments + 1) * j + (i - 1);
						const c = (radialSegments + 1) * j + i;
						const d = (radialSegments + 1) * (j - 1) + i; // faces

						indices.push(a, b, d);
						indices.push(b, c, d);
					}
				}
			}

			function generateUVs() {
				for (let i = 0; i <= tubularSegments; i++) {
					for (let j = 0; j <= radialSegments; j++) {
						uv.x = i / tubularSegments;
						uv.y = j / radialSegments;
						uvs.push(uv.x, uv.y);
					}
				}
			}
		}

		toJSON() {
			const data = super.toJSON();
			data.path = this.parameters.path.toJSON();
			return data;
		}

		static fromJSON(data) {
			// This only works for built-in curves (e.g. CatmullRomCurve3).
			// User defined curves or instances of CurvePath will not be deserialized.
			return new TubeGeometry(new Curves[data.path.type]().fromJSON(data.path), data.tubularSegments, data.radius, data.radialSegments, data.closed);
		}

	}

	class WireframeGeometry extends BufferGeometry {
		constructor(geometry = null) {
			super();
			this.type = 'WireframeGeometry';
			this.parameters = {
				geometry: geometry
			};

			if (geometry !== null) {
				// buffer
				const vertices = [];
				const edges = new Set(); // helper variables

				const start = new Vector3();
				const end = new Vector3();

				if (geometry.index !== null) {
					// indexed BufferGeometry
					const position = geometry.attributes.position;
					const indices = geometry.index;
					let groups = geometry.groups;

					if (groups.length === 0) {
						groups = [{
							start: 0,
							count: indices.count,
							materialIndex: 0
						}];
					} // create a data structure that contains all edges without duplicates


					for (let o = 0, ol = groups.length; o < ol; ++o) {
						const group = groups[o];
						const groupStart = group.start;
						const groupCount = group.count;

						for (let i = groupStart, l = groupStart + groupCount; i < l; i += 3) {
							for (let j = 0; j < 3; j++) {
								const index1 = indices.getX(i + j);
								const index2 = indices.getX(i + (j + 1) % 3);
								start.fromBufferAttribute(position, index1);
								end.fromBufferAttribute(position, index2);

								if (isUniqueEdge(start, end, edges) === true) {
									vertices.push(start.x, start.y, start.z);
									vertices.push(end.x, end.y, end.z);
								}
							}
						}
					}
				} else {
					// non-indexed BufferGeometry
					const position = geometry.attributes.position;

					for (let i = 0, l = position.count / 3; i < l; i++) {
						for (let j = 0; j < 3; j++) {
							// three edges per triangle, an edge is represented as (index1, index2)
							// e.g. the first triangle has the following edges: (0,1),(1,2),(2,0)
							const index1 = 3 * i + j;
							const index2 = 3 * i + (j + 1) % 3;
							start.fromBufferAttribute(position, index1);
							end.fromBufferAttribute(position, index2);

							if (isUniqueEdge(start, end, edges) === true) {
								vertices.push(start.x, start.y, start.z);
								vertices.push(end.x, end.y, end.z);
							}
						}
					}
				} // build geometry


				this.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			}
		}

	}

	function isUniqueEdge(start, end, edges) {
		const hash1 = `${start.x},${start.y},${start.z}-${end.x},${end.y},${end.z}`;
		const hash2 = `${end.x},${end.y},${end.z}-${start.x},${start.y},${start.z}`; // coincident edge

		if (edges.has(hash1) === true || edges.has(hash2) === true) {
			return false;
		} else {
			edges.add(hash1);
			edges.add(hash2);
			return true;
		}
	}

	var Geometries = /*#__PURE__*/Object.freeze({
		__proto__: null,
		BoxGeometry: BoxGeometry,
		BoxBufferGeometry: BoxGeometry,
		CapsuleGeometry: CapsuleGeometry,
		CapsuleBufferGeometry: CapsuleGeometry,
		CircleGeometry: CircleGeometry,
		CircleBufferGeometry: CircleGeometry,
		ConeGeometry: ConeGeometry,
		ConeBufferGeometry: ConeGeometry,
		CylinderGeometry: CylinderGeometry,
		CylinderBufferGeometry: CylinderGeometry,
		DodecahedronGeometry: DodecahedronGeometry,
		DodecahedronBufferGeometry: DodecahedronGeometry,
		EdgesGeometry: EdgesGeometry,
		ExtrudeGeometry: ExtrudeGeometry,
		ExtrudeBufferGeometry: ExtrudeGeometry,
		IcosahedronGeometry: IcosahedronGeometry,
		IcosahedronBufferGeometry: IcosahedronGeometry,
		LatheGeometry: LatheGeometry,
		LatheBufferGeometry: LatheGeometry,
		OctahedronGeometry: OctahedronGeometry,
		OctahedronBufferGeometry: OctahedronGeometry,
		PlaneGeometry: PlaneGeometry,
		PlaneBufferGeometry: PlaneGeometry,
		PolyhedronGeometry: PolyhedronGeometry,
		PolyhedronBufferGeometry: PolyhedronGeometry,
		RingGeometry: RingGeometry,
		RingBufferGeometry: RingGeometry,
		ShapeGeometry: ShapeGeometry,
		ShapeBufferGeometry: ShapeGeometry,
		SphereGeometry: SphereGeometry,
		SphereBufferGeometry: SphereGeometry,
		TetrahedronGeometry: TetrahedronGeometry,
		TetrahedronBufferGeometry: TetrahedronGeometry,
		TorusGeometry: TorusGeometry,
		TorusBufferGeometry: TorusGeometry,
		TorusKnotGeometry: TorusKnotGeometry,
		TorusKnotBufferGeometry: TorusKnotGeometry,
		TubeGeometry: TubeGeometry,
		TubeBufferGeometry: TubeGeometry,
		WireframeGeometry: WireframeGeometry
	});

	class ShadowMaterial extends Material {
		constructor(parameters) {
			super();
			this.isShadowMaterial = true;
			this.type = 'ShadowMaterial';
			this.color = new Color(0x000000);
			this.transparent = true;
			this.fog = true;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.color.copy(source.color);
			this.fog = source.fog;
			return this;
		}

	}

	class RawShaderMaterial extends ShaderMaterial {
		constructor(parameters) {
			super(parameters);
			this.isRawShaderMaterial = true;
			this.type = 'RawShaderMaterial';
		}

	}

	class MeshStandardMaterial extends Material {
		constructor(parameters) {
			super();
			this.isMeshStandardMaterial = true;
			this.defines = {
				'STANDARD': ''
			};
			this.type = 'MeshStandardMaterial';
			this.color = new Color(0xffffff); // diffuse

			this.roughness = 1.0;
			this.metalness = 0.0;
			this.map = null;
			this.lightMap = null;
			this.lightMapIntensity = 1.0;
			this.aoMap = null;
			this.aoMapIntensity = 1.0;
			this.emissive = new Color(0x000000);
			this.emissiveIntensity = 1.0;
			this.emissiveMap = null;
			this.bumpMap = null;
			this.bumpScale = 1;
			this.normalMap = null;
			this.normalMapType = TangentSpaceNormalMap;
			this.normalScale = new Vector2(1, 1);
			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;
			this.roughnessMap = null;
			this.metalnessMap = null;
			this.alphaMap = null;
			this.envMap = null;
			this.envMapIntensity = 1.0;
			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.wireframeLinecap = 'round';
			this.wireframeLinejoin = 'round';
			this.flatShading = false;
			this.fog = true;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.defines = {
				'STANDARD': ''
			};
			this.color.copy(source.color);
			this.roughness = source.roughness;
			this.metalness = source.metalness;
			this.map = source.map;
			this.lightMap = source.lightMap;
			this.lightMapIntensity = source.lightMapIntensity;
			this.aoMap = source.aoMap;
			this.aoMapIntensity = source.aoMapIntensity;
			this.emissive.copy(source.emissive);
			this.emissiveMap = source.emissiveMap;
			this.emissiveIntensity = source.emissiveIntensity;
			this.bumpMap = source.bumpMap;
			this.bumpScale = source.bumpScale;
			this.normalMap = source.normalMap;
			this.normalMapType = source.normalMapType;
			this.normalScale.copy(source.normalScale);
			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;
			this.roughnessMap = source.roughnessMap;
			this.metalnessMap = source.metalnessMap;
			this.alphaMap = source.alphaMap;
			this.envMap = source.envMap;
			this.envMapIntensity = source.envMapIntensity;
			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.wireframeLinecap = source.wireframeLinecap;
			this.wireframeLinejoin = source.wireframeLinejoin;
			this.flatShading = source.flatShading;
			this.fog = source.fog;
			return this;
		}

	}

	class MeshPhysicalMaterial extends MeshStandardMaterial {
		constructor(parameters) {
			super();
			this.isMeshPhysicalMaterial = true;
			this.defines = {
				'STANDARD': '',
				'PHYSICAL': ''
			};
			this.type = 'MeshPhysicalMaterial';
			this.clearcoatMap = null;
			this.clearcoatRoughness = 0.0;
			this.clearcoatRoughnessMap = null;
			this.clearcoatNormalScale = new Vector2(1, 1);
			this.clearcoatNormalMap = null;
			this.ior = 1.5;
			Object.defineProperty(this, 'reflectivity', {
				get: function () {
					return clamp(2.5 * (this.ior - 1) / (this.ior + 1), 0, 1);
				},
				set: function (reflectivity) {
					this.ior = (1 + 0.4 * reflectivity) / (1 - 0.4 * reflectivity);
				}
			});
			this.iridescenceMap = null;
			this.iridescenceIOR = 1.3;
			this.iridescenceThicknessRange = [100, 400];
			this.iridescenceThicknessMap = null;
			this.sheenColor = new Color(0x000000);
			this.sheenColorMap = null;
			this.sheenRoughness = 1.0;
			this.sheenRoughnessMap = null;
			this.transmissionMap = null;
			this.thickness = 0;
			this.thicknessMap = null;
			this.attenuationDistance = 0.0;
			this.attenuationColor = new Color(1, 1, 1);
			this.specularIntensity = 1.0;
			this.specularIntensityMap = null;
			this.specularColor = new Color(1, 1, 1);
			this.specularColorMap = null;
			this._sheen = 0.0;
			this._clearcoat = 0;
			this._iridescence = 0;
			this._transmission = 0;
			this.setValues(parameters);
		}

		get sheen() {
			return this._sheen;
		}

		set sheen(value) {
			if (this._sheen > 0 !== value > 0) {
				this.version++;
			}

			this._sheen = value;
		}

		get clearcoat() {
			return this._clearcoat;
		}

		set clearcoat(value) {
			if (this._clearcoat > 0 !== value > 0) {
				this.version++;
			}

			this._clearcoat = value;
		}

		get iridescence() {
			return this._iridescence;
		}

		set iridescence(value) {
			if (this._iridescence > 0 !== value > 0) {
				this.version++;
			}

			this._iridescence = value;
		}

		get transmission() {
			return this._transmission;
		}

		set transmission(value) {
			if (this._transmission > 0 !== value > 0) {
				this.version++;
			}

			this._transmission = value;
		}

		copy(source) {
			super.copy(source);
			this.defines = {
				'STANDARD': '',
				'PHYSICAL': ''
			};
			this.clearcoat = source.clearcoat;
			this.clearcoatMap = source.clearcoatMap;
			this.clearcoatRoughness = source.clearcoatRoughness;
			this.clearcoatRoughnessMap = source.clearcoatRoughnessMap;
			this.clearcoatNormalMap = source.clearcoatNormalMap;
			this.clearcoatNormalScale.copy(source.clearcoatNormalScale);
			this.ior = source.ior;
			this.iridescence = source.iridescence;
			this.iridescenceMap = source.iridescenceMap;
			this.iridescenceIOR = source.iridescenceIOR;
			this.iridescenceThicknessRange = [...source.iridescenceThicknessRange];
			this.iridescenceThicknessMap = source.iridescenceThicknessMap;
			this.sheen = source.sheen;
			this.sheenColor.copy(source.sheenColor);
			this.sheenColorMap = source.sheenColorMap;
			this.sheenRoughness = source.sheenRoughness;
			this.sheenRoughnessMap = source.sheenRoughnessMap;
			this.transmission = source.transmission;
			this.transmissionMap = source.transmissionMap;
			this.thickness = source.thickness;
			this.thicknessMap = source.thicknessMap;
			this.attenuationDistance = source.attenuationDistance;
			this.attenuationColor.copy(source.attenuationColor);
			this.specularIntensity = source.specularIntensity;
			this.specularIntensityMap = source.specularIntensityMap;
			this.specularColor.copy(source.specularColor);
			this.specularColorMap = source.specularColorMap;
			return this;
		}

	}

	class MeshPhongMaterial extends Material {
		constructor(parameters) {
			super();
			this.isMeshPhongMaterial = true;
			this.type = 'MeshPhongMaterial';
			this.color = new Color(0xffffff); // diffuse

			this.specular = new Color(0x111111);
			this.shininess = 30;
			this.map = null;
			this.lightMap = null;
			this.lightMapIntensity = 1.0;
			this.aoMap = null;
			this.aoMapIntensity = 1.0;
			this.emissive = new Color(0x000000);
			this.emissiveIntensity = 1.0;
			this.emissiveMap = null;
			this.bumpMap = null;
			this.bumpScale = 1;
			this.normalMap = null;
			this.normalMapType = TangentSpaceNormalMap;
			this.normalScale = new Vector2(1, 1);
			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;
			this.specularMap = null;
			this.alphaMap = null;
			this.envMap = null;
			this.combine = MultiplyOperation;
			this.reflectivity = 1;
			this.refractionRatio = 0.98;
			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.wireframeLinecap = 'round';
			this.wireframeLinejoin = 'round';
			this.flatShading = false;
			this.fog = true;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.color.copy(source.color);
			this.specular.copy(source.specular);
			this.shininess = source.shininess;
			this.map = source.map;
			this.lightMap = source.lightMap;
			this.lightMapIntensity = source.lightMapIntensity;
			this.aoMap = source.aoMap;
			this.aoMapIntensity = source.aoMapIntensity;
			this.emissive.copy(source.emissive);
			this.emissiveMap = source.emissiveMap;
			this.emissiveIntensity = source.emissiveIntensity;
			this.bumpMap = source.bumpMap;
			this.bumpScale = source.bumpScale;
			this.normalMap = source.normalMap;
			this.normalMapType = source.normalMapType;
			this.normalScale.copy(source.normalScale);
			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;
			this.specularMap = source.specularMap;
			this.alphaMap = source.alphaMap;
			this.envMap = source.envMap;
			this.combine = source.combine;
			this.reflectivity = source.reflectivity;
			this.refractionRatio = source.refractionRatio;
			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.wireframeLinecap = source.wireframeLinecap;
			this.wireframeLinejoin = source.wireframeLinejoin;
			this.flatShading = source.flatShading;
			this.fog = source.fog;
			return this;
		}

	}

	class MeshToonMaterial extends Material {
		constructor(parameters) {
			super();
			this.isMeshToonMaterial = true;
			this.defines = {
				'TOON': ''
			};
			this.type = 'MeshToonMaterial';
			this.color = new Color(0xffffff);
			this.map = null;
			this.gradientMap = null;
			this.lightMap = null;
			this.lightMapIntensity = 1.0;
			this.aoMap = null;
			this.aoMapIntensity = 1.0;
			this.emissive = new Color(0x000000);
			this.emissiveIntensity = 1.0;
			this.emissiveMap = null;
			this.bumpMap = null;
			this.bumpScale = 1;
			this.normalMap = null;
			this.normalMapType = TangentSpaceNormalMap;
			this.normalScale = new Vector2(1, 1);
			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;
			this.alphaMap = null;
			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.wireframeLinecap = 'round';
			this.wireframeLinejoin = 'round';
			this.fog = true;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.color.copy(source.color);
			this.map = source.map;
			this.gradientMap = source.gradientMap;
			this.lightMap = source.lightMap;
			this.lightMapIntensity = source.lightMapIntensity;
			this.aoMap = source.aoMap;
			this.aoMapIntensity = source.aoMapIntensity;
			this.emissive.copy(source.emissive);
			this.emissiveMap = source.emissiveMap;
			this.emissiveIntensity = source.emissiveIntensity;
			this.bumpMap = source.bumpMap;
			this.bumpScale = source.bumpScale;
			this.normalMap = source.normalMap;
			this.normalMapType = source.normalMapType;
			this.normalScale.copy(source.normalScale);
			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;
			this.alphaMap = source.alphaMap;
			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.wireframeLinecap = source.wireframeLinecap;
			this.wireframeLinejoin = source.wireframeLinejoin;
			this.fog = source.fog;
			return this;
		}

	}

	class MeshNormalMaterial extends Material {
		constructor(parameters) {
			super();
			this.isMeshNormalMaterial = true;
			this.type = 'MeshNormalMaterial';
			this.bumpMap = null;
			this.bumpScale = 1;
			this.normalMap = null;
			this.normalMapType = TangentSpaceNormalMap;
			this.normalScale = new Vector2(1, 1);
			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;
			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.flatShading = false;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.bumpMap = source.bumpMap;
			this.bumpScale = source.bumpScale;
			this.normalMap = source.normalMap;
			this.normalMapType = source.normalMapType;
			this.normalScale.copy(source.normalScale);
			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;
			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.flatShading = source.flatShading;
			return this;
		}

	}

	class MeshLambertMaterial extends Material {
		constructor(parameters) {
			super();
			this.isMeshLambertMaterial = true;
			this.type = 'MeshLambertMaterial';
			this.color = new Color(0xffffff); // diffuse

			this.map = null;
			this.lightMap = null;
			this.lightMapIntensity = 1.0;
			this.aoMap = null;
			this.aoMapIntensity = 1.0;
			this.emissive = new Color(0x000000);
			this.emissiveIntensity = 1.0;
			this.emissiveMap = null;
			this.specularMap = null;
			this.alphaMap = null;
			this.envMap = null;
			this.combine = MultiplyOperation;
			this.reflectivity = 1;
			this.refractionRatio = 0.98;
			this.wireframe = false;
			this.wireframeLinewidth = 1;
			this.wireframeLinecap = 'round';
			this.wireframeLinejoin = 'round';
			this.fog = true;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.color.copy(source.color);
			this.map = source.map;
			this.lightMap = source.lightMap;
			this.lightMapIntensity = source.lightMapIntensity;
			this.aoMap = source.aoMap;
			this.aoMapIntensity = source.aoMapIntensity;
			this.emissive.copy(source.emissive);
			this.emissiveMap = source.emissiveMap;
			this.emissiveIntensity = source.emissiveIntensity;
			this.specularMap = source.specularMap;
			this.alphaMap = source.alphaMap;
			this.envMap = source.envMap;
			this.combine = source.combine;
			this.reflectivity = source.reflectivity;
			this.refractionRatio = source.refractionRatio;
			this.wireframe = source.wireframe;
			this.wireframeLinewidth = source.wireframeLinewidth;
			this.wireframeLinecap = source.wireframeLinecap;
			this.wireframeLinejoin = source.wireframeLinejoin;
			this.fog = source.fog;
			return this;
		}

	}

	class MeshMatcapMaterial extends Material {
		constructor(parameters) {
			super();
			this.isMeshMatcapMaterial = true;
			this.defines = {
				'MATCAP': ''
			};
			this.type = 'MeshMatcapMaterial';
			this.color = new Color(0xffffff); // diffuse

			this.matcap = null;
			this.map = null;
			this.bumpMap = null;
			this.bumpScale = 1;
			this.normalMap = null;
			this.normalMapType = TangentSpaceNormalMap;
			this.normalScale = new Vector2(1, 1);
			this.displacementMap = null;
			this.displacementScale = 1;
			this.displacementBias = 0;
			this.alphaMap = null;
			this.flatShading = false;
			this.fog = true;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.defines = {
				'MATCAP': ''
			};
			this.color.copy(source.color);
			this.matcap = source.matcap;
			this.map = source.map;
			this.bumpMap = source.bumpMap;
			this.bumpScale = source.bumpScale;
			this.normalMap = source.normalMap;
			this.normalMapType = source.normalMapType;
			this.normalScale.copy(source.normalScale);
			this.displacementMap = source.displacementMap;
			this.displacementScale = source.displacementScale;
			this.displacementBias = source.displacementBias;
			this.alphaMap = source.alphaMap;
			this.flatShading = source.flatShading;
			this.fog = source.fog;
			return this;
		}

	}

	class LineDashedMaterial extends LineBasicMaterial {
		constructor(parameters) {
			super();
			this.isLineDashedMaterial = true;
			this.type = 'LineDashedMaterial';
			this.scale = 1;
			this.dashSize = 3;
			this.gapSize = 1;
			this.setValues(parameters);
		}

		copy(source) {
			super.copy(source);
			this.scale = source.scale;
			this.dashSize = source.dashSize;
			this.gapSize = source.gapSize;
			return this;
		}

	}

	function arraySlice(array, from, to) {
		if (isTypedArray(array)) {
			// in ios9 array.subarray(from, undefined) will return empty array
			// but array.subarray(from) or array.subarray(from, len) is correct
			return new array.constructor(array.subarray(from, to !== undefined ? to : array.length));
		}

		return array.slice(from, to);
	} // converts an array to a specific type


	function convertArray(array, type, forceClone) {
		if (!array || // let 'undefined' and 'null' pass
		!forceClone && array.constructor === type) return array;

		if (typeof type.BYTES_PER_ELEMENT === 'number') {
			return new type(array); // create typed array
		}

		return Array.prototype.slice.call(array); // create Array
	}

	function isTypedArray(object) {
		return ArrayBuffer.isView(object) && !(object instanceof DataView);
	} // returns an array by which times and values can be sorted


	function getKeyframeOrder(times) {
		function compareTime(i, j) {
			return times[i] - times[j];
		}

		const n = times.length;
		const result = new Array(n);

		for (let i = 0; i !== n; ++i) result[i] = i;

		result.sort(compareTime);
		return result;
	} // uses the array previously returned by 'getKeyframeOrder' to sort data


	function sortedArray(values, stride, order) {
		const nValues = values.length;
		const result = new values.constructor(nValues);

		for (let i = 0, dstOffset = 0; dstOffset !== nValues; ++i) {
			const srcOffset = order[i] * stride;

			for (let j = 0; j !== stride; ++j) {
				result[dstOffset++] = values[srcOffset + j];
			}
		}

		return result;
	} // function for parsing AOS keyframe formats


	function flattenJSON(jsonKeys, times, values, valuePropertyName) {
		let i = 1,
				key = jsonKeys[0];

		while (key !== undefined && key[valuePropertyName] === undefined) {
			key = jsonKeys[i++];
		}

		if (key === undefined) return; // no data

		let value = key[valuePropertyName];
		if (value === undefined) return; // no data

		if (Array.isArray(value)) {
			do {
				value = key[valuePropertyName];

				if (value !== undefined) {
					times.push(key.time);
					values.push.apply(values, value); // push all elements
				}

				key = jsonKeys[i++];
			} while (key !== undefined);
		} else if (value.toArray !== undefined) {
			// ...assume THREE.Math-ish
			do {
				value = key[valuePropertyName];

				if (value !== undefined) {
					times.push(key.time);
					value.toArray(values, values.length);
				}

				key = jsonKeys[i++];
			} while (key !== undefined);
		} else {
			// otherwise push as-is
			do {
				value = key[valuePropertyName];

				if (value !== undefined) {
					times.push(key.time);
					values.push(value);
				}

				key = jsonKeys[i++];
			} while (key !== undefined);
		}
	}

	function subclip(sourceClip, name, startFrame, endFrame, fps = 30) {
		const clip = sourceClip.clone();
		clip.name = name;
		const tracks = [];

		for (let i = 0; i < clip.tracks.length; ++i) {
			const track = clip.tracks[i];
			const valueSize = track.getValueSize();
			const times = [];
			const values = [];

			for (let j = 0; j < track.times.length; ++j) {
				const frame = track.times[j] * fps;
				if (frame < startFrame || frame >= endFrame) continue;
				times.push(track.times[j]);

				for (let k = 0; k < valueSize; ++k) {
					values.push(track.values[j * valueSize + k]);
				}
			}

			if (times.length === 0) continue;
			track.times = convertArray(times, track.times.constructor);
			track.values = convertArray(values, track.values.constructor);
			tracks.push(track);
		}

		clip.tracks = tracks; // find minimum .times value across all tracks in the trimmed clip

		let minStartTime = Infinity;

		for (let i = 0; i < clip.tracks.length; ++i) {
			if (minStartTime > clip.tracks[i].times[0]) {
				minStartTime = clip.tracks[i].times[0];
			}
		} // shift all tracks such that clip begins at t=0


		for (let i = 0; i < clip.tracks.length; ++i) {
			clip.tracks[i].shift(-1 * minStartTime);
		}

		clip.resetDuration();
		return clip;
	}

	function makeClipAdditive(targetClip, referenceFrame = 0, referenceClip = targetClip, fps = 30) {
		if (fps <= 0) fps = 30;
		const numTracks = referenceClip.tracks.length;
		const referenceTime = referenceFrame / fps; // Make each track's values relative to the values at the reference frame

		for (let i = 0; i < numTracks; ++i) {
			const referenceTrack = referenceClip.tracks[i];
			const referenceTrackType = referenceTrack.ValueTypeName; // Skip this track if it's non-numeric

			if (referenceTrackType === 'bool' || referenceTrackType === 'string') continue; // Find the track in the target clip whose name and type matches the reference track

			const targetTrack = targetClip.tracks.find(function (track) {
				return track.name === referenceTrack.name && track.ValueTypeName === referenceTrackType;
			});
			if (targetTrack === undefined) continue;
			let referenceOffset = 0;
			const referenceValueSize = referenceTrack.getValueSize();

			if (referenceTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline) {
				referenceOffset = referenceValueSize / 3;
			}

			let targetOffset = 0;
			const targetValueSize = targetTrack.getValueSize();

			if (targetTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline) {
				targetOffset = targetValueSize / 3;
			}

			const lastIndex = referenceTrack.times.length - 1;
			let referenceValue; // Find the value to subtract out of the track

			if (referenceTime <= referenceTrack.times[0]) {
				// Reference frame is earlier than the first keyframe, so just use the first keyframe
				const startIndex = referenceOffset;
				const endIndex = referenceValueSize - referenceOffset;
				referenceValue = arraySlice(referenceTrack.values, startIndex, endIndex);
			} else if (referenceTime >= referenceTrack.times[lastIndex]) {
				// Reference frame is after the last keyframe, so just use the last keyframe
				const startIndex = lastIndex * referenceValueSize + referenceOffset;
				const endIndex = startIndex + referenceValueSize - referenceOffset;
				referenceValue = arraySlice(referenceTrack.values, startIndex, endIndex);
			} else {
				// Interpolate to the reference value
				const interpolant = referenceTrack.createInterpolant();
				const startIndex = referenceOffset;
				const endIndex = referenceValueSize - referenceOffset;
				interpolant.evaluate(referenceTime);
				referenceValue = arraySlice(interpolant.resultBuffer, startIndex, endIndex);
			} // Conjugate the quaternion


			if (referenceTrackType === 'quaternion') {
				const referenceQuat = new Quaternion().fromArray(referenceValue).normalize().conjugate();
				referenceQuat.toArray(referenceValue);
			} // Subtract the reference value from all of the track values


			const numTimes = targetTrack.times.length;

			for (let j = 0; j < numTimes; ++j) {
				const valueStart = j * targetValueSize + targetOffset;

				if (referenceTrackType === 'quaternion') {
					// Multiply the conjugate for quaternion track types
					Quaternion.multiplyQuaternionsFlat(targetTrack.values, valueStart, referenceValue, 0, targetTrack.values, valueStart);
				} else {
					const valueEnd = targetValueSize - targetOffset * 2; // Subtract each value for all other numeric track types

					for (let k = 0; k < valueEnd; ++k) {
						targetTrack.values[valueStart + k] -= referenceValue[k];
					}
				}
			}
		}

		targetClip.blendMode = AdditiveAnimationBlendMode;
		return targetClip;
	}

	var AnimationUtils = /*#__PURE__*/Object.freeze({
		__proto__: null,
		arraySlice: arraySlice,
		convertArray: convertArray,
		isTypedArray: isTypedArray,
		getKeyframeOrder: getKeyframeOrder,
		sortedArray: sortedArray,
		flattenJSON: flattenJSON,
		subclip: subclip,
		makeClipAdditive: makeClipAdditive
	});

	/**
	 * Abstract base class of interpolants over parametric samples.
	 *
	 * The parameter domain is one dimensional, typically the time or a path
	 * along a curve defined by the data.
	 *
	 * The sample values can have any dimensionality and derived classes may
	 * apply special interpretations to the data.
	 *
	 * This class provides the interval seek in a Template Method, deferring
	 * the actual interpolation to derived classes.
	 *
	 * Time complexity is O(1) for linear access crossing at most two points
	 * and O(log N) for random access, where N is the number of positions.
	 *
	 * References:
	 *
	 * 		http://www.oodesign.com/template-method-pattern.html
	 *
	 */
	class Interpolant {
		constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
			this.parameterPositions = parameterPositions;
			this._cachedIndex = 0;
			this.resultBuffer = resultBuffer !== undefined ? resultBuffer : new sampleValues.constructor(sampleSize);
			this.sampleValues = sampleValues;
			this.valueSize = sampleSize;
			this.settings = null;
			this.DefaultSettings_ = {};
		}

		evaluate(t) {
			const pp = this.parameterPositions;
			let i1 = this._cachedIndex,
					t1 = pp[i1],
					t0 = pp[i1 - 1];

			validate_interval: {
				seek: {
					let right;

					linear_scan: {
						//- See http://jsperf.com/comparison-to-undefined/3
						//- slower code:
						//-
						//- 				if ( t >= t1 || t1 === undefined ) {
						forward_scan: if (!(t < t1)) {
							for (let giveUpAt = i1 + 2;;) {
								if (t1 === undefined) {
									if (t < t0) break forward_scan; // after end

									i1 = pp.length;
									this._cachedIndex = i1;
									return this.copySampleValue_(i1 - 1);
								}

								if (i1 === giveUpAt) break; // this loop

								t0 = t1;
								t1 = pp[++i1];

								if (t < t1) {
									// we have arrived at the sought interval
									break seek;
								}
							} // prepare binary search on the right side of the index


							right = pp.length;
							break linear_scan;
						} //- slower code:
						//-					if ( t < t0 || t0 === undefined ) {


						if (!(t >= t0)) {
							// looping?
							const t1global = pp[1];

							if (t < t1global) {
								i1 = 2; // + 1, using the scan for the details

								t0 = t1global;
							} // linear reverse scan


							for (let giveUpAt = i1 - 2;;) {
								if (t0 === undefined) {
									// before start
									this._cachedIndex = 0;
									return this.copySampleValue_(0);
								}

								if (i1 === giveUpAt) break; // this loop

								t1 = t0;
								t0 = pp[--i1 - 1];

								if (t >= t0) {
									// we have arrived at the sought interval
									break seek;
								}
							} // prepare binary search on the left side of the index


							right = i1;
							i1 = 0;
							break linear_scan;
						} // the interval is valid


						break validate_interval;
					} // linear scan
					// binary search


					while (i1 < right) {
						const mid = i1 + right >>> 1;

						if (t < pp[mid]) {
							right = mid;
						} else {
							i1 = mid + 1;
						}
					}

					t1 = pp[i1];
					t0 = pp[i1 - 1]; // check boundary cases, again

					if (t0 === undefined) {
						this._cachedIndex = 0;
						return this.copySampleValue_(0);
					}

					if (t1 === undefined) {
						i1 = pp.length;
						this._cachedIndex = i1;
						return this.copySampleValue_(i1 - 1);
					}
				} // seek


				this._cachedIndex = i1;
				this.intervalChanged_(i1, t0, t1);
			} // validate_interval


			return this.interpolate_(i1, t0, t, t1);
		}

		getSettings_() {
			return this.settings || this.DefaultSettings_;
		}

		copySampleValue_(index) {
			// copies a sample value to the result buffer
			const result = this.resultBuffer,
						values = this.sampleValues,
						stride = this.valueSize,
						offset = index * stride;

			for (let i = 0; i !== stride; ++i) {
				result[i] = values[offset + i];
			}

			return result;
		} // Template methods for derived classes:


		interpolate_() {
			throw new Error('call to abstract method'); // implementations shall return this.resultBuffer
		}

		intervalChanged_() {// empty
		}

	}

	/**
	 * Fast and simple cubic spline interpolant.
	 *
	 * It was derived from a Hermitian construction setting the first derivative
	 * at each sample position to the linear slope between neighboring positions
	 * over their parameter interval.
	 */

	class CubicInterpolant extends Interpolant {
		constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
			super(parameterPositions, sampleValues, sampleSize, resultBuffer);
			this._weightPrev = -0;
			this._offsetPrev = -0;
			this._weightNext = -0;
			this._offsetNext = -0;
			this.DefaultSettings_ = {
				endingStart: ZeroCurvatureEnding,
				endingEnd: ZeroCurvatureEnding
			};
		}

		intervalChanged_(i1, t0, t1) {
			const pp = this.parameterPositions;
			let iPrev = i1 - 2,
					iNext = i1 + 1,
					tPrev = pp[iPrev],
					tNext = pp[iNext];

			if (tPrev === undefined) {
				switch (this.getSettings_().endingStart) {
					case ZeroSlopeEnding:
						// f'(t0) = 0
						iPrev = i1;
						tPrev = 2 * t0 - t1;
						break;

					case WrapAroundEnding:
						// use the other end of the curve
						iPrev = pp.length - 2;
						tPrev = t0 + pp[iPrev] - pp[iPrev + 1];
						break;

					default:
						// ZeroCurvatureEnding
						// f''(t0) = 0 a.k.a. Natural Spline
						iPrev = i1;
						tPrev = t1;
				}
			}

			if (tNext === undefined) {
				switch (this.getSettings_().endingEnd) {
					case ZeroSlopeEnding:
						// f'(tN) = 0
						iNext = i1;
						tNext = 2 * t1 - t0;
						break;

					case WrapAroundEnding:
						// use the other end of the curve
						iNext = 1;
						tNext = t1 + pp[1] - pp[0];
						break;

					default:
						// ZeroCurvatureEnding
						// f''(tN) = 0, a.k.a. Natural Spline
						iNext = i1 - 1;
						tNext = t0;
				}
			}

			const halfDt = (t1 - t0) * 0.5,
						stride = this.valueSize;
			this._weightPrev = halfDt / (t0 - tPrev);
			this._weightNext = halfDt / (tNext - t1);
			this._offsetPrev = iPrev * stride;
			this._offsetNext = iNext * stride;
		}

		interpolate_(i1, t0, t, t1) {
			const result = this.resultBuffer,
						values = this.sampleValues,
						stride = this.valueSize,
						o1 = i1 * stride,
						o0 = o1 - stride,
						oP = this._offsetPrev,
						oN = this._offsetNext,
						wP = this._weightPrev,
						wN = this._weightNext,
						p = (t - t0) / (t1 - t0),
						pp = p * p,
						ppp = pp * p; // evaluate polynomials

			const sP = -wP * ppp + 2 * wP * pp - wP * p;
			const s0 = (1 + wP) * ppp + (-1.5 - 2 * wP) * pp + (-0.5 + wP) * p + 1;
			const s1 = (-1 - wN) * ppp + (1.5 + wN) * pp + 0.5 * p;
			const sN = wN * ppp - wN * pp; // combine data linearly

			for (let i = 0; i !== stride; ++i) {
				result[i] = sP * values[oP + i] + s0 * values[o0 + i] + s1 * values[o1 + i] + sN * values[oN + i];
			}

			return result;
		}

	}

	class LinearInterpolant extends Interpolant {
		constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
			super(parameterPositions, sampleValues, sampleSize, resultBuffer);
		}

		interpolate_(i1, t0, t, t1) {
			const result = this.resultBuffer,
						values = this.sampleValues,
						stride = this.valueSize,
						offset1 = i1 * stride,
						offset0 = offset1 - stride,
						weight1 = (t - t0) / (t1 - t0),
						weight0 = 1 - weight1;

			for (let i = 0; i !== stride; ++i) {
				result[i] = values[offset0 + i] * weight0 + values[offset1 + i] * weight1;
			}

			return result;
		}

	}

	/**
	 *
	 * Interpolant that evaluates to the sample value at the position preceding
	 * the parameter.
	 */

	class DiscreteInterpolant extends Interpolant {
		constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
			super(parameterPositions, sampleValues, sampleSize, resultBuffer);
		}

		interpolate_(i1
		/*, t0, t, t1 */
		) {
			return this.copySampleValue_(i1 - 1);
		}

	}

	class KeyframeTrack {
		constructor(name, times, values, interpolation) {
			if (name === undefined) throw new Error('THREE.KeyframeTrack: track name is undefined');
			if (times === undefined || times.length === 0) throw new Error('THREE.KeyframeTrack: no keyframes in track named ' + name);
			this.name = name;
			this.times = convertArray(times, this.TimeBufferType);
			this.values = convertArray(values, this.ValueBufferType);
			this.setInterpolation(interpolation || this.DefaultInterpolation);
		} // Serialization (in static context, because of constructor invocation
		// and automatic invocation of .toJSON):


		static toJSON(track) {
			const trackType = track.constructor;
			let json; // derived classes can define a static toJSON method

			if (trackType.toJSON !== this.toJSON) {
				json = trackType.toJSON(track);
			} else {
				// by default, we assume the data can be serialized as-is
				json = {
					'name': track.name,
					'times': convertArray(track.times, Array),
					'values': convertArray(track.values, Array)
				};
				const interpolation = track.getInterpolation();

				if (interpolation !== track.DefaultInterpolation) {
					json.interpolation = interpolation;
				}
			}

			json.type = track.ValueTypeName; // mandatory

			return json;
		}

		InterpolantFactoryMethodDiscrete(result) {
			return new DiscreteInterpolant(this.times, this.values, this.getValueSize(), result);
		}

		InterpolantFactoryMethodLinear(result) {
			return new LinearInterpolant(this.times, this.values, this.getValueSize(), result);
		}

		InterpolantFactoryMethodSmooth(result) {
			return new CubicInterpolant(this.times, this.values, this.getValueSize(), result);
		}

		setInterpolation(interpolation) {
			let factoryMethod;

			switch (interpolation) {
				case InterpolateDiscrete:
					factoryMethod = this.InterpolantFactoryMethodDiscrete;
					break;

				case InterpolateLinear:
					factoryMethod = this.InterpolantFactoryMethodLinear;
					break;

				case InterpolateSmooth:
					factoryMethod = this.InterpolantFactoryMethodSmooth;
					break;
			}

			if (factoryMethod === undefined) {
				const message = 'unsupported interpolation for ' + this.ValueTypeName + ' keyframe track named ' + this.name;

				if (this.createInterpolant === undefined) {
					// fall back to default, unless the default itself is messed up
					if (interpolation !== this.DefaultInterpolation) {
						this.setInterpolation(this.DefaultInterpolation);
					} else {
						throw new Error(message); // fatal, in this case
					}
				}

				console.warn('THREE.KeyframeTrack:', message);
				return this;
			}

			this.createInterpolant = factoryMethod;
			return this;
		}

		getInterpolation() {
			switch (this.createInterpolant) {
				case this.InterpolantFactoryMethodDiscrete:
					return InterpolateDiscrete;

				case this.InterpolantFactoryMethodLinear:
					return InterpolateLinear;

				case this.InterpolantFactoryMethodSmooth:
					return InterpolateSmooth;
			}
		}

		getValueSize() {
			return this.values.length / this.times.length;
		} // move all keyframes either forwards or backwards in time


		shift(timeOffset) {
			if (timeOffset !== 0.0) {
				const times = this.times;

				for (let i = 0, n = times.length; i !== n; ++i) {
					times[i] += timeOffset;
				}
			}

			return this;
		} // scale all keyframe times by a factor (useful for frame <-> seconds conversions)


		scale(timeScale) {
			if (timeScale !== 1.0) {
				const times = this.times;

				for (let i = 0, n = times.length; i !== n; ++i) {
					times[i] *= timeScale;
				}
			}

			return this;
		} // removes keyframes before and after animation without changing any values within the range [startTime, endTime].
		// IMPORTANT: We do not shift around keys to the start of the track time, because for interpolated keys this will change their values


		trim(startTime, endTime) {
			const times = this.times,
						nKeys = times.length;
			let from = 0,
					to = nKeys - 1;

			while (from !== nKeys && times[from] < startTime) {
				++from;
			}

			while (to !== -1 && times[to] > endTime) {
				--to;
			}

			++to; // inclusive -> exclusive bound

			if (from !== 0 || to !== nKeys) {
				// empty tracks are forbidden, so keep at least one keyframe
				if (from >= to) {
					to = Math.max(to, 1);
					from = to - 1;
				}

				const stride = this.getValueSize();
				this.times = arraySlice(times, from, to);
				this.values = arraySlice(this.values, from * stride, to * stride);
			}

			return this;
		} // ensure we do not get a GarbageInGarbageOut situation, make sure tracks are at least minimally viable


		validate() {
			let valid = true;
			const valueSize = this.getValueSize();

			if (valueSize - Math.floor(valueSize) !== 0) {
				console.error('THREE.KeyframeTrack: Invalid value size in track.', this);
				valid = false;
			}

			const times = this.times,
						values = this.values,
						nKeys = times.length;

			if (nKeys === 0) {
				console.error('THREE.KeyframeTrack: Track is empty.', this);
				valid = false;
			}

			let prevTime = null;

			for (let i = 0; i !== nKeys; i++) {
				const currTime = times[i];

				if (typeof currTime === 'number' && isNaN(currTime)) {
					console.error('THREE.KeyframeTrack: Time is not a valid number.', this, i, currTime);
					valid = false;
					break;
				}

				if (prevTime !== null && prevTime > currTime) {
					console.error('THREE.KeyframeTrack: Out of order keys.', this, i, currTime, prevTime);
					valid = false;
					break;
				}

				prevTime = currTime;
			}

			if (values !== undefined) {
				if (isTypedArray(values)) {
					for (let i = 0, n = values.length; i !== n; ++i) {
						const value = values[i];

						if (isNaN(value)) {
							console.error('THREE.KeyframeTrack: Value is not a valid number.', this, i, value);
							valid = false;
							break;
						}
					}
				}
			}

			return valid;
		} // removes equivalent sequential keys as common in morph target sequences
		// (0,0,0,0,1,1,1,0,0,0,0,0,0,0) --> (0,0,1,1,0,0)


		optimize() {
			// times or values may be shared with other tracks, so overwriting is unsafe
			const times = arraySlice(this.times),
						values = arraySlice(this.values),
						stride = this.getValueSize(),
						smoothInterpolation = this.getInterpolation() === InterpolateSmooth,
						lastIndex = times.length - 1;
			let writeIndex = 1;

			for (let i = 1; i < lastIndex; ++i) {
				let keep = false;
				const time = times[i];
				const timeNext = times[i + 1]; // remove adjacent keyframes scheduled at the same time

				if (time !== timeNext && (i !== 1 || time !== times[0])) {
					if (!smoothInterpolation) {
						// remove unnecessary keyframes same as their neighbors
						const offset = i * stride,
									offsetP = offset - stride,
									offsetN = offset + stride;

						for (let j = 0; j !== stride; ++j) {
							const value = values[offset + j];

							if (value !== values[offsetP + j] || value !== values[offsetN + j]) {
								keep = true;
								break;
							}
						}
					} else {
						keep = true;
					}
				} // in-place compaction


				if (keep) {
					if (i !== writeIndex) {
						times[writeIndex] = times[i];
						const readOffset = i * stride,
									writeOffset = writeIndex * stride;

						for (let j = 0; j !== stride; ++j) {
							values[writeOffset + j] = values[readOffset + j];
						}
					}

					++writeIndex;
				}
			} // flush last keyframe (compaction looks ahead)


			if (lastIndex > 0) {
				times[writeIndex] = times[lastIndex];

				for (let readOffset = lastIndex * stride, writeOffset = writeIndex * stride, j = 0; j !== stride; ++j) {
					values[writeOffset + j] = values[readOffset + j];
				}

				++writeIndex;
			}

			if (writeIndex !== times.length) {
				this.times = arraySlice(times, 0, writeIndex);
				this.values = arraySlice(values, 0, writeIndex * stride);
			} else {
				this.times = times;
				this.values = values;
			}

			return this;
		}

		clone() {
			const times = arraySlice(this.times, 0);
			const values = arraySlice(this.values, 0);
			const TypedKeyframeTrack = this.constructor;
			const track = new TypedKeyframeTrack(this.name, times, values); // Interpolant argument to constructor is not saved, so copy the factory method directly.

			track.createInterpolant = this.createInterpolant;
			return track;
		}

	}

	KeyframeTrack.prototype.TimeBufferType = Float32Array;
	KeyframeTrack.prototype.ValueBufferType = Float32Array;
	KeyframeTrack.prototype.DefaultInterpolation = InterpolateLinear;

	/**
	 * A Track of Boolean keyframe values.
	 */

	class BooleanKeyframeTrack extends KeyframeTrack {}

	BooleanKeyframeTrack.prototype.ValueTypeName = 'bool';
	BooleanKeyframeTrack.prototype.ValueBufferType = Array;
	BooleanKeyframeTrack.prototype.DefaultInterpolation = InterpolateDiscrete;
	BooleanKeyframeTrack.prototype.InterpolantFactoryMethodLinear = undefined;
	BooleanKeyframeTrack.prototype.InterpolantFactoryMethodSmooth = undefined; // Note: Actually this track could have a optimized / compressed

	/**
	 * A Track of keyframe values that represent color.
	 */

	class ColorKeyframeTrack extends KeyframeTrack {}

	ColorKeyframeTrack.prototype.ValueTypeName = 'color'; // ValueBufferType is inherited

	/**
	 * A Track of numeric keyframe values.
	 */

	class NumberKeyframeTrack extends KeyframeTrack {}

	NumberKeyframeTrack.prototype.ValueTypeName = 'number'; // ValueBufferType is inherited

	/**
	 * Spherical linear unit quaternion interpolant.
	 */

	class QuaternionLinearInterpolant extends Interpolant {
		constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
			super(parameterPositions, sampleValues, sampleSize, resultBuffer);
		}

		interpolate_(i1, t0, t, t1) {
			const result = this.resultBuffer,
						values = this.sampleValues,
						stride = this.valueSize,
						alpha = (t - t0) / (t1 - t0);
			let offset = i1 * stride;

			for (let end = offset + stride; offset !== end; offset += 4) {
				Quaternion.slerpFlat(result, 0, values, offset - stride, values, offset, alpha);
			}

			return result;
		}

	}

	/**
	 * A Track of quaternion keyframe values.
	 */

	class QuaternionKeyframeTrack extends KeyframeTrack {
		InterpolantFactoryMethodLinear(result) {
			return new QuaternionLinearInterpolant(this.times, this.values, this.getValueSize(), result);
		}

	}

	QuaternionKeyframeTrack.prototype.ValueTypeName = 'quaternion'; // ValueBufferType is inherited

	QuaternionKeyframeTrack.prototype.DefaultInterpolation = InterpolateLinear;
	QuaternionKeyframeTrack.prototype.InterpolantFactoryMethodSmooth = undefined;

	/**
	 * A Track that interpolates Strings
	 */

	class StringKeyframeTrack extends KeyframeTrack {}

	StringKeyframeTrack.prototype.ValueTypeName = 'string';
	StringKeyframeTrack.prototype.ValueBufferType = Array;
	StringKeyframeTrack.prototype.DefaultInterpolation = InterpolateDiscrete;
	StringKeyframeTrack.prototype.InterpolantFactoryMethodLinear = undefined;
	StringKeyframeTrack.prototype.InterpolantFactoryMethodSmooth = undefined;

	/**
	 * A Track of vectored keyframe values.
	 */

	class VectorKeyframeTrack extends KeyframeTrack {}

	VectorKeyframeTrack.prototype.ValueTypeName = 'vector'; // ValueBufferType is inherited

	class AnimationClip {
		constructor(name, duration = -1, tracks, blendMode = NormalAnimationBlendMode) {
			this.name = name;
			this.tracks = tracks;
			this.duration = duration;
			this.blendMode = blendMode;
			this.uuid = generateUUID(); // this means it should figure out its duration by scanning the tracks

			if (this.duration < 0) {
				this.resetDuration();
			}
		}

		static parse(json) {
			const tracks = [],
						jsonTracks = json.tracks,
						frameTime = 1.0 / (json.fps || 1.0);

			for (let i = 0, n = jsonTracks.length; i !== n; ++i) {
				tracks.push(parseKeyframeTrack(jsonTracks[i]).scale(frameTime));
			}

			const clip = new this(json.name, json.duration, tracks, json.blendMode);
			clip.uuid = json.uuid;
			return clip;
		}

		static toJSON(clip) {
			const tracks = [],
						clipTracks = clip.tracks;
			const json = {
				'name': clip.name,
				'duration': clip.duration,
				'tracks': tracks,
				'uuid': clip.uuid,
				'blendMode': clip.blendMode
			};

			for (let i = 0, n = clipTracks.length; i !== n; ++i) {
				tracks.push(KeyframeTrack.toJSON(clipTracks[i]));
			}

			return json;
		}

		static CreateFromMorphTargetSequence(name, morphTargetSequence, fps, noLoop) {
			const numMorphTargets = morphTargetSequence.length;
			const tracks = [];

			for (let i = 0; i < numMorphTargets; i++) {
				let times = [];
				let values = [];
				times.push((i + numMorphTargets - 1) % numMorphTargets, i, (i + 1) % numMorphTargets);
				values.push(0, 1, 0);
				const order = getKeyframeOrder(times);
				times = sortedArray(times, 1, order);
				values = sortedArray(values, 1, order); // if there is a key at the first frame, duplicate it as the
				// last frame as well for perfect loop.

				if (!noLoop && times[0] === 0) {
					times.push(numMorphTargets);
					values.push(values[0]);
				}

				tracks.push(new NumberKeyframeTrack('.morphTargetInfluences[' + morphTargetSequence[i].name + ']', times, values).scale(1.0 / fps));
			}

			return new this(name, -1, tracks);
		}

		static findByName(objectOrClipArray, name) {
			let clipArray = objectOrClipArray;

			if (!Array.isArray(objectOrClipArray)) {
				const o = objectOrClipArray;
				clipArray = o.geometry && o.geometry.animations || o.animations;
			}

			for (let i = 0; i < clipArray.length; i++) {
				if (clipArray[i].name === name) {
					return clipArray[i];
				}
			}

			return null;
		}

		static CreateClipsFromMorphTargetSequences(morphTargets, fps, noLoop) {
			const animationToMorphTargets = {}; // tested with https://regex101.com/ on trick sequences
			// such flamingo_flyA_003, flamingo_run1_003, crdeath0059

			const pattern = /^([\w-]*?)([\d]+)$/; // sort morph target names into animation groups based
			// patterns like Walk_001, Walk_002, Run_001, Run_002

			for (let i = 0, il = morphTargets.length; i < il; i++) {
				const morphTarget = morphTargets[i];
				const parts = morphTarget.name.match(pattern);

				if (parts && parts.length > 1) {
					const name = parts[1];
					let animationMorphTargets = animationToMorphTargets[name];

					if (!animationMorphTargets) {
						animationToMorphTargets[name] = animationMorphTargets = [];
					}

					animationMorphTargets.push(morphTarget);
				}
			}

			const clips = [];

			for (const name in animationToMorphTargets) {
				clips.push(this.CreateFromMorphTargetSequence(name, animationToMorphTargets[name], fps, noLoop));
			}

			return clips;
		} // parse the animation.hierarchy format


		static parseAnimation(animation, bones) {
			if (!animation) {
				console.error('THREE.AnimationClip: No animation in JSONLoader data.');
				return null;
			}

			const addNonemptyTrack = function (trackType, trackName, animationKeys, propertyName, destTracks) {
				// only return track if there are actually keys.
				if (animationKeys.length !== 0) {
					const times = [];
					const values = [];
					flattenJSON(animationKeys, times, values, propertyName); // empty keys are filtered out, so check again

					if (times.length !== 0) {
						destTracks.push(new trackType(trackName, times, values));
					}
				}
			};

			const tracks = [];
			const clipName = animation.name || 'default';
			const fps = animation.fps || 30;
			const blendMode = animation.blendMode; // automatic length determination in AnimationClip.

			let duration = animation.length || -1;
			const hierarchyTracks = animation.hierarchy || [];

			for (let h = 0; h < hierarchyTracks.length; h++) {
				const animationKeys = hierarchyTracks[h].keys; // skip empty tracks

				if (!animationKeys || animationKeys.length === 0) continue; // process morph targets

				if (animationKeys[0].morphTargets) {
					// figure out all morph targets used in this track
					const morphTargetNames = {};
					let k;

					for (k = 0; k < animationKeys.length; k++) {
						if (animationKeys[k].morphTargets) {
							for (let m = 0; m < animationKeys[k].morphTargets.length; m++) {
								morphTargetNames[animationKeys[k].morphTargets[m]] = -1;
							}
						}
					} // create a track for each morph target with all zero
					// morphTargetInfluences except for the keys in which
					// the morphTarget is named.


					for (const morphTargetName in morphTargetNames) {
						const times = [];
						const values = [];

						for (let m = 0; m !== animationKeys[k].morphTargets.length; ++m) {
							const animationKey = animationKeys[k];
							times.push(animationKey.time);
							values.push(animationKey.morphTarget === morphTargetName ? 1 : 0);
						}

						tracks.push(new NumberKeyframeTrack('.morphTargetInfluence[' + morphTargetName + ']', times, values));
					}

					duration = morphTargetNames.length * fps;
				} else {
					// ...assume skeletal animation
					const boneName = '.bones[' + bones[h].name + ']';
					addNonemptyTrack(VectorKeyframeTrack, boneName + '.position', animationKeys, 'pos', tracks);
					addNonemptyTrack(QuaternionKeyframeTrack, boneName + '.quaternion', animationKeys, 'rot', tracks);
					addNonemptyTrack(VectorKeyframeTrack, boneName + '.scale', animationKeys, 'scl', tracks);
				}
			}

			if (tracks.length === 0) {
				return null;
			}

			const clip = new this(clipName, duration, tracks, blendMode);
			return clip;
		}

		resetDuration() {
			const tracks = this.tracks;
			let duration = 0;

			for (let i = 0, n = tracks.length; i !== n; ++i) {
				const track = this.tracks[i];
				duration = Math.max(duration, track.times[track.times.length - 1]);
			}

			this.duration = duration;
			return this;
		}

		trim() {
			for (let i = 0; i < this.tracks.length; i++) {
				this.tracks[i].trim(0, this.duration);
			}

			return this;
		}

		validate() {
			let valid = true;

			for (let i = 0; i < this.tracks.length; i++) {
				valid = valid && this.tracks[i].validate();
			}

			return valid;
		}

		optimize() {
			for (let i = 0; i < this.tracks.length; i++) {
				this.tracks[i].optimize();
			}

			return this;
		}

		clone() {
			const tracks = [];

			for (let i = 0; i < this.tracks.length; i++) {
				tracks.push(this.tracks[i].clone());
			}

			return new this.constructor(this.name, this.duration, tracks, this.blendMode);
		}

		toJSON() {
			return this.constructor.toJSON(this);
		}

	}

	function getTrackTypeForValueTypeName(typeName) {
		switch (typeName.toLowerCase()) {
			case 'scalar':
			case 'double':
			case 'float':
			case 'number':
			case 'integer':
				return NumberKeyframeTrack;

			case 'vector':
			case 'vector2':
			case 'vector3':
			case 'vector4':
				return VectorKeyframeTrack;

			case 'color':
				return ColorKeyframeTrack;

			case 'quaternion':
				return QuaternionKeyframeTrack;

			case 'bool':
			case 'boolean':
				return BooleanKeyframeTrack;

			case 'string':
				return StringKeyframeTrack;
		}

		throw new Error('THREE.KeyframeTrack: Unsupported typeName: ' + typeName);
	}

	function parseKeyframeTrack(json) {
		if (json.type === undefined) {
			throw new Error('THREE.KeyframeTrack: track type undefined, can not parse');
		}

		const trackType = getTrackTypeForValueTypeName(json.type);

		if (json.times === undefined) {
			const times = [],
						values = [];
			flattenJSON(json.keys, times, values, 'value');
			json.times = times;
			json.values = values;
		} // derived classes can define a static parse method


		if (trackType.parse !== undefined) {
			return trackType.parse(json);
		} else {
			// by default, we assume a constructor compatible with the base
			return new trackType(json.name, json.times, json.values, json.interpolation);
		}
	}

	const Cache = {
		enabled: false,
		files: {},
		add: function (key, file) {
			if (this.enabled === false) return; // console.log( 'THREE.Cache', 'Adding key:', key );

			this.files[key] = file;
		},
		get: function (key) {
			if (this.enabled === false) return; // console.log( 'THREE.Cache', 'Checking key:', key );

			return this.files[key];
		},
		remove: function (key) {
			delete this.files[key];
		},
		clear: function () {
			this.files = {};
		}
	};

	class LoadingManager {
		constructor(onLoad, onProgress, onError) {
			const scope = this;
			let isLoading = false;
			let itemsLoaded = 0;
			let itemsTotal = 0;
			let urlModifier = undefined;
			const handlers = []; // Refer to #5689 for the reason why we don't set .onStart
			// in the constructor

			this.onStart = undefined;
			this.onLoad = onLoad;
			this.onProgress = onProgress;
			this.onError = onError;

			this.itemStart = function (url) {
				itemsTotal++;

				if (isLoading === false) {
					if (scope.onStart !== undefined) {
						scope.onStart(url, itemsLoaded, itemsTotal);
					}
				}

				isLoading = true;
			};

			this.itemEnd = function (url) {
				itemsLoaded++;

				if (scope.onProgress !== undefined) {
					scope.onProgress(url, itemsLoaded, itemsTotal);
				}

				if (itemsLoaded === itemsTotal) {
					isLoading = false;

					if (scope.onLoad !== undefined) {
						scope.onLoad();
					}
				}
			};

			this.itemError = function (url) {
				if (scope.onError !== undefined) {
					scope.onError(url);
				}
			};

			this.resolveURL = function (url) {
				if (urlModifier) {
					return urlModifier(url);
				}

				return url;
			};

			this.setURLModifier = function (transform) {
				urlModifier = transform;
				return this;
			};

			this.addHandler = function (regex, loader) {
				handlers.push(regex, loader);
				return this;
			};

			this.removeHandler = function (regex) {
				const index = handlers.indexOf(regex);

				if (index !== -1) {
					handlers.splice(index, 2);
				}

				return this;
			};

			this.getHandler = function (file) {
				for (let i = 0, l = handlers.length; i < l; i += 2) {
					const regex = handlers[i];
					const loader = handlers[i + 1];
					if (regex.global) regex.lastIndex = 0; // see #17920

					if (regex.test(file)) {
						return loader;
					}
				}

				return null;
			};
		}

	}

	const DefaultLoadingManager = /*@__PURE__*/new LoadingManager();

	class Loader {
		constructor(manager) {
			this.manager = manager !== undefined ? manager : DefaultLoadingManager;
			this.crossOrigin = 'anonymous';
			this.withCredentials = false;
			this.path = '';
			this.resourcePath = '';
			this.requestHeader = {};
		}

		load() {}

		loadAsync(url, onProgress) {
			const scope = this;
			return new Promise(function (resolve, reject) {
				scope.load(url, resolve, onProgress, reject);
			});
		}

		parse() {}

		setCrossOrigin(crossOrigin) {
			this.crossOrigin = crossOrigin;
			return this;
		}

		setWithCredentials(value) {
			this.withCredentials = value;
			return this;
		}

		setPath(path) {
			this.path = path;
			return this;
		}

		setResourcePath(resourcePath) {
			this.resourcePath = resourcePath;
			return this;
		}

		setRequestHeader(requestHeader) {
			this.requestHeader = requestHeader;
			return this;
		}

	}

	const loading = {};

	class HttpError extends Error {
		constructor(message, response) {
			super(message);
			this.response = response;
		}

	}

	class FileLoader extends Loader {
		constructor(manager) {
			super(manager);
		}

		load(url, onLoad, onProgress, onError) {
			if (url === undefined) url = '';
			if (this.path !== undefined) url = this.path + url;
			url = this.manager.resolveURL(url);
			const cached = Cache.get(url);

			if (cached !== undefined) {
				this.manager.itemStart(url);
				setTimeout(() => {
					if (onLoad) onLoad(cached);
					this.manager.itemEnd(url);
				}, 0);
				return cached;
			} // Check if request is duplicate


			if (loading[url] !== undefined) {
				loading[url].push({
					onLoad: onLoad,
					onProgress: onProgress,
					onError: onError
				});
				return;
			} // Initialise array for duplicate requests


			loading[url] = [];
			loading[url].push({
				onLoad: onLoad,
				onProgress: onProgress,
				onError: onError
			}); // create request

			const req = new Request(url, {
				headers: new Headers(this.requestHeader),
				credentials: this.withCredentials ? 'include' : 'same-origin' // An abort controller could be added within a future PR

			}); // record states ( avoid data race )

			const mimeType = this.mimeType;
			const responseType = this.responseType; // start the fetch

			fetch(req).then(response => {
				if (response.status === 200 || response.status === 0) {
					// Some browsers return HTTP Status 0 when using non-http protocol
					// e.g. 'file://' or 'data://'. Handle as success.
					if (response.status === 0) {
						console.warn('THREE.FileLoader: HTTP Status 0 received.');
					} // Workaround: Checking if response.body === undefined for Alipay browser #23548


					if (typeof ReadableStream === 'undefined' || response.body === undefined || response.body.getReader === undefined) {
						return response;
					}

					const callbacks = loading[url];
					const reader = response.body.getReader();
					const contentLength = response.headers.get('Content-Length');
					const total = contentLength ? parseInt(contentLength) : 0;
					const lengthComputable = total !== 0;
					let loaded = 0; // periodically read data into the new stream tracking while download progress

					const stream = new ReadableStream({
						start(controller) {
							readData();

							function readData() {
								reader.read().then(({
									done,
									value
								}) => {
									if (done) {
										controller.close();
									} else {
										loaded += value.byteLength;
										const event = new ProgressEvent('progress', {
											lengthComputable,
											loaded,
											total
										});

										for (let i = 0, il = callbacks.length; i < il; i++) {
											const callback = callbacks[i];
											if (callback.onProgress) callback.onProgress(event);
										}

										controller.enqueue(value);
										readData();
									}
								});
							}
						}

					});
					return new Response(stream);
				} else {
					throw new HttpError(`fetch for "${response.url}" responded with ${response.status}: ${response.statusText}`, response);
				}
			}).then(response => {
				switch (responseType) {
					case 'arraybuffer':
						return response.arrayBuffer();

					case 'blob':
						return response.blob();

					case 'document':
						return response.text().then(text => {
							const parser = new DOMParser();
							return parser.parseFromString(text, mimeType);
						});

					case 'json':
						return response.json();

					default:
						if (mimeType === undefined) {
							return response.text();
						} else {
							// sniff encoding
							const re = /charset="?([^;"\s]*)"?/i;
							const exec = re.exec(mimeType);
							const label = exec && exec[1] ? exec[1].toLowerCase() : undefined;
							const decoder = new TextDecoder(label);
							return response.arrayBuffer().then(ab => decoder.decode(ab));
						}

				}
			}).then(data => {
				// Add to cache only on HTTP success, so that we do not cache
				// error response bodies as proper responses to requests.
				Cache.add(url, data);
				const callbacks = loading[url];
				delete loading[url];

				for (let i = 0, il = callbacks.length; i < il; i++) {
					const callback = callbacks[i];
					if (callback.onLoad) callback.onLoad(data);
				}
			}).catch(err => {
				// Abort errors and other errors are handled the same
				const callbacks = loading[url];

				if (callbacks === undefined) {
					// When onLoad was called and url was deleted in `loading`
					this.manager.itemError(url);
					throw err;
				}

				delete loading[url];

				for (let i = 0, il = callbacks.length; i < il; i++) {
					const callback = callbacks[i];
					if (callback.onError) callback.onError(err);
				}

				this.manager.itemError(url);
			}).finally(() => {
				this.manager.itemEnd(url);
			});
			this.manager.itemStart(url);
		}

		setResponseType(value) {
			this.responseType = value;
			return this;
		}

		setMimeType(value) {
			this.mimeType = value;
			return this;
		}

	}

	class AnimationLoader extends Loader {
		constructor(manager) {
			super(manager);
		}

		load(url, onLoad, onProgress, onError) {
			const scope = this;
			const loader = new FileLoader(this.manager);
			loader.setPath(this.path);
			loader.setRequestHeader(this.requestHeader);
			loader.setWithCredentials(this.withCredentials);
			loader.load(url, function (text) {
				try {
					onLoad(scope.parse(JSON.parse(text)));
				} catch (e) {
					if (onError) {
						onError(e);
					} else {
						console.error(e);
					}

					scope.manager.itemError(url);
				}
			}, onProgress, onError);
		}

		parse(json) {
			const animations = [];

			for (let i = 0; i < json.length; i++) {
				const clip = AnimationClip.parse(json[i]);
				animations.push(clip);
			}

			return animations;
		}

	}

	/**
	 * Abstract Base class to block based textures loader (dds, pvr, ...)
	 *
	 * Sub classes have to implement the parse() method which will be used in load().
	 */

	class CompressedTextureLoader extends Loader {
		constructor(manager) {
			super(manager);
		}

		load(url, onLoad, onProgress, onError) {
			const scope = this;
			const images = [];
			const texture = new CompressedTexture();
			const loader = new FileLoader(this.manager);
			loader.setPath(this.path);
			loader.setResponseType('arraybuffer');
			loader.setRequestHeader(this.requestHeader);
			loader.setWithCredentials(scope.withCredentials);
			let loaded = 0;

			function loadTexture(i) {
				loader.load(url[i], function (buffer) {
					const texDatas = scope.parse(buffer, true);
					images[i] = {
						width: texDatas.width,
						height: texDatas.height,
						format: texDatas.format,
						mipmaps: texDatas.mipmaps
					};
					loaded += 1;

					if (loaded === 6) {
						if (texDatas.mipmapCount === 1) texture.minFilter = LinearFilter;
						texture.image = images;
						texture.format = texDatas.format;
						texture.needsUpdate = true;
						if (onLoad) onLoad(texture);
					}
				}, onProgress, onError);
			}

			if (Array.isArray(url)) {
				for (let i = 0, il = url.length; i < il; ++i) {
					loadTexture(i);
				}
			} else {
				// compressed cubemap texture stored in a single DDS file
				loader.load(url, function (buffer) {
					const texDatas = scope.parse(buffer, true);

					if (texDatas.isCubemap) {
						const faces = texDatas.mipmaps.length / texDatas.mipmapCount;

						for (let f = 0; f < faces; f++) {
							images[f] = {
								mipmaps: []
							};

							for (let i = 0; i < texDatas.mipmapCount; i++) {
								images[f].mipmaps.push(texDatas.mipmaps[f * texDatas.mipmapCount + i]);
								images[f].format = texDatas.format;
								images[f].width = texDatas.width;
								images[f].height = texDatas.height;
							}
						}

						texture.image = images;
					} else {
						texture.image.width = texDatas.width;
						texture.image.height = texDatas.height;
						texture.mipmaps = texDatas.mipmaps;
					}

					if (texDatas.mipmapCount === 1) {
						texture.minFilter = LinearFilter;
					}

					texture.format = texDatas.format;
					texture.needsUpdate = true;
					if (onLoad) onLoad(texture);
				}, onProgress, onError);
			}

			return texture;
		}

	}

	class ImageLoader extends Loader {
		constructor(manager) {
			super(manager);
		}

		load(url, onLoad, onProgress, onError) {
			if (this.path !== undefined) url = this.path + url;
			url = this.manager.resolveURL(url);
			const scope = this;
			const cached = Cache.get(url);

			if (cached !== undefined) {
				scope.manager.itemStart(url);
				setTimeout(function () {
					if (onLoad) onLoad(cached);
					scope.manager.itemEnd(url);
				}, 0);
				return cached;
			}

			const image = createElementNS('img');

			function onImageLoad() {
				removeEventListeners();
				Cache.add(url, this);
				if (onLoad) onLoad(this);
				scope.manager.itemEnd(url);
			}

			function onImageError(event) {
				removeEventListeners();
				if (onError) onError(event);
				scope.manager.itemError(url);
				scope.manager.itemEnd(url);
			}

			function removeEventListeners() {
				image.removeEventListener('load', onImageLoad, false);
				image.removeEventListener('error', onImageError, false);
			}

			image.addEventListener('load', onImageLoad, false);
			image.addEventListener('error', onImageError, false);

			if (url.slice(0, 5) !== 'data:') {
				if (this.crossOrigin !== undefined) image.crossOrigin = this.crossOrigin;
			}

			scope.manager.itemStart(url);
			image.src = url;
			return image;
		}

	}

	class CubeTextureLoader extends Loader {
		constructor(manager) {
			super(manager);
		}

		load(urls, onLoad, onProgress, onError) {
			const texture = new CubeTexture();
			const loader = new ImageLoader(this.manager);
			loader.setCrossOrigin(this.crossOrigin);
			loader.setPath(this.path);
			let loaded = 0;

			function loadTexture(i) {
				loader.load(urls[i], function (image) {
					texture.images[i] = image;
					loaded++;

					if (loaded === 6) {
						texture.needsUpdate = true;
						if (onLoad) onLoad(texture);
					}
				}, undefined, onError);
			}

			for (let i = 0; i < urls.length; ++i) {
				loadTexture(i);
			}

			return texture;
		}

	}

	/**
	 * Abstract Base class to load generic binary textures formats (rgbe, hdr, ...)
	 *
	 * Sub classes have to implement the parse() method which will be used in load().
	 */

	class DataTextureLoader extends Loader {
		constructor(manager) {
			super(manager);
		}

		load(url, onLoad, onProgress, onError) {
			const scope = this;
			const texture = new DataTexture();
			const loader = new FileLoader(this.manager);
			loader.setResponseType('arraybuffer');
			loader.setRequestHeader(this.requestHeader);
			loader.setPath(this.path);
			loader.setWithCredentials(scope.withCredentials);
			loader.load(url, function (buffer) {
				const texData = scope.parse(buffer);
				if (!texData) return;

				if (texData.image !== undefined) {
					texture.image = texData.image;
				} else if (texData.data !== undefined) {
					texture.image.width = texData.width;
					texture.image.height = texData.height;
					texture.image.data = texData.data;
				}

				texture.wrapS = texData.wrapS !== undefined ? texData.wrapS : ClampToEdgeWrapping;
				texture.wrapT = texData.wrapT !== undefined ? texData.wrapT : ClampToEdgeWrapping;
				texture.magFilter = texData.magFilter !== undefined ? texData.magFilter : LinearFilter;
				texture.minFilter = texData.minFilter !== undefined ? texData.minFilter : LinearFilter;
				texture.anisotropy = texData.anisotropy !== undefined ? texData.anisotropy : 1;

				if (texData.encoding !== undefined) {
					texture.encoding = texData.encoding;
				}

				if (texData.flipY !== undefined) {
					texture.flipY = texData.flipY;
				}

				if (texData.format !== undefined) {
					texture.format = texData.format;
				}

				if (texData.type !== undefined) {
					texture.type = texData.type;
				}

				if (texData.mipmaps !== undefined) {
					texture.mipmaps = texData.mipmaps;
					texture.minFilter = LinearMipmapLinearFilter; // presumably...
				}

				if (texData.mipmapCount === 1) {
					texture.minFilter = LinearFilter;
				}

				if (texData.generateMipmaps !== undefined) {
					texture.generateMipmaps = texData.generateMipmaps;
				}

				texture.needsUpdate = true;
				if (onLoad) onLoad(texture, texData);
			}, onProgress, onError);
			return texture;
		}

	}

	class TextureLoader extends Loader {
		constructor(manager) {
			super(manager);
		}

		load(url, onLoad, onProgress, onError) {
			const texture = new Texture();
			const loader = new ImageLoader(this.manager);
			loader.setCrossOrigin(this.crossOrigin);
			loader.setPath(this.path);
			loader.load(url, function (image) {
				texture.image = image;
				texture.needsUpdate = true;

				if (onLoad !== undefined) {
					onLoad(texture);
				}
			}, onProgress, onError);
			return texture;
		}

	}

	class Light extends Object3D {
		constructor(color, intensity = 1) {
			super();
			this.isLight = true;
			this.type = 'Light';
			this.color = new Color(color);
			this.intensity = intensity;
		}

		dispose() {// Empty here in base class; some subclasses override.
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.color.copy(source.color);
			this.intensity = source.intensity;
			return this;
		}

		toJSON(meta) {
			const data = super.toJSON(meta);
			data.object.color = this.color.getHex();
			data.object.intensity = this.intensity;
			if (this.groundColor !== undefined) data.object.groundColor = this.groundColor.getHex();
			if (this.distance !== undefined) data.object.distance = this.distance;
			if (this.angle !== undefined) data.object.angle = this.angle;
			if (this.decay !== undefined) data.object.decay = this.decay;
			if (this.penumbra !== undefined) data.object.penumbra = this.penumbra;
			if (this.shadow !== undefined) data.object.shadow = this.shadow.toJSON();
			return data;
		}

	}

	class HemisphereLight extends Light {
		constructor(skyColor, groundColor, intensity) {
			super(skyColor, intensity);
			this.isHemisphereLight = true;
			this.type = 'HemisphereLight';
			this.position.copy(Object3D.DefaultUp);
			this.updateMatrix();
			this.groundColor = new Color(groundColor);
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.groundColor.copy(source.groundColor);
			return this;
		}

	}

	const _projScreenMatrix$1 = /*@__PURE__*/new Matrix4();

	const _lightPositionWorld$1 = /*@__PURE__*/new Vector3();

	const _lookTarget$1 = /*@__PURE__*/new Vector3();

	class LightShadow {
		constructor(camera) {
			this.camera = camera;
			this.bias = 0;
			this.normalBias = 0;
			this.radius = 1;
			this.blurSamples = 8;
			this.mapSize = new Vector2(512, 512);
			this.map = null;
			this.mapPass = null;
			this.matrix = new Matrix4();
			this.autoUpdate = true;
			this.needsUpdate = false;
			this._frustum = new Frustum();
			this._frameExtents = new Vector2(1, 1);
			this._viewportCount = 1;
			this._viewports = [new Vector4(0, 0, 1, 1)];
		}

		getViewportCount() {
			return this._viewportCount;
		}

		getFrustum() {
			return this._frustum;
		}

		updateMatrices(light) {
			const shadowCamera = this.camera;
			const shadowMatrix = this.matrix;

			_lightPositionWorld$1.setFromMatrixPosition(light.matrixWorld);

			shadowCamera.position.copy(_lightPositionWorld$1);

			_lookTarget$1.setFromMatrixPosition(light.target.matrixWorld);

			shadowCamera.lookAt(_lookTarget$1);
			shadowCamera.updateMatrixWorld();

			_projScreenMatrix$1.multiplyMatrices(shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse);

			this._frustum.setFromProjectionMatrix(_projScreenMatrix$1);

			shadowMatrix.set(0.5, 0.0, 0.0, 0.5, 0.0, 0.5, 0.0, 0.5, 0.0, 0.0, 0.5, 0.5, 0.0, 0.0, 0.0, 1.0);
			shadowMatrix.multiply(shadowCamera.projectionMatrix);
			shadowMatrix.multiply(shadowCamera.matrixWorldInverse);
		}

		getViewport(viewportIndex) {
			return this._viewports[viewportIndex];
		}

		getFrameExtents() {
			return this._frameExtents;
		}

		dispose() {
			if (this.map) {
				this.map.dispose();
			}

			if (this.mapPass) {
				this.mapPass.dispose();
			}
		}

		copy(source) {
			this.camera = source.camera.clone();
			this.bias = source.bias;
			this.radius = source.radius;
			this.mapSize.copy(source.mapSize);
			return this;
		}

		clone() {
			return new this.constructor().copy(this);
		}

		toJSON() {
			const object = {};
			if (this.bias !== 0) object.bias = this.bias;
			if (this.normalBias !== 0) object.normalBias = this.normalBias;
			if (this.radius !== 1) object.radius = this.radius;
			if (this.mapSize.x !== 512 || this.mapSize.y !== 512) object.mapSize = this.mapSize.toArray();
			object.camera = this.camera.toJSON(false).object;
			delete object.camera.matrix;
			return object;
		}

	}

	class SpotLightShadow extends LightShadow {
		constructor() {
			super(new PerspectiveCamera(50, 1, 0.5, 500));
			this.isSpotLightShadow = true;
			this.focus = 1;
		}

		updateMatrices(light) {
			const camera = this.camera;
			const fov = RAD2DEG * 2 * light.angle * this.focus;
			const aspect = this.mapSize.width / this.mapSize.height;
			const far = light.distance || camera.far;

			if (fov !== camera.fov || aspect !== camera.aspect || far !== camera.far) {
				camera.fov = fov;
				camera.aspect = aspect;
				camera.far = far;
				camera.updateProjectionMatrix();
			}

			super.updateMatrices(light);
		}

		copy(source) {
			super.copy(source);
			this.focus = source.focus;
			return this;
		}

	}

	class SpotLight extends Light {
		constructor(color, intensity, distance = 0, angle = Math.PI / 3, penumbra = 0, decay = 1) {
			super(color, intensity);
			this.isSpotLight = true;
			this.type = 'SpotLight';
			this.position.copy(Object3D.DefaultUp);
			this.updateMatrix();
			this.target = new Object3D();
			this.distance = distance;
			this.angle = angle;
			this.penumbra = penumbra;
			this.decay = decay; // for physically correct lights, should be 2.

			this.shadow = new SpotLightShadow();
		}

		get power() {
			// compute the light's luminous power (in lumens) from its intensity (in candela)
			// by convention for a spotlight, luminous power (lm) = π * luminous intensity (cd)
			return this.intensity * Math.PI;
		}

		set power(power) {
			// set the light's intensity (in candela) from the desired luminous power (in lumens)
			this.intensity = power / Math.PI;
		}

		dispose() {
			this.shadow.dispose();
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.distance = source.distance;
			this.angle = source.angle;
			this.penumbra = source.penumbra;
			this.decay = source.decay;
			this.target = source.target.clone();
			this.shadow = source.shadow.clone();
			return this;
		}

	}

	const _projScreenMatrix = /*@__PURE__*/new Matrix4();

	const _lightPositionWorld = /*@__PURE__*/new Vector3();

	const _lookTarget = /*@__PURE__*/new Vector3();

	class PointLightShadow extends LightShadow {
		constructor() {
			super(new PerspectiveCamera(90, 1, 0.5, 500));
			this.isPointLightShadow = true;
			this._frameExtents = new Vector2(4, 2);
			this._viewportCount = 6;
			this._viewports = [// These viewports map a cube-map onto a 2D texture with the
			// following orientation:
			//
			//	xzXZ
			//	 y Y
			//
			// X - Positive x direction
			// x - Negative x direction
			// Y - Positive y direction
			// y - Negative y direction
			// Z - Positive z direction
			// z - Negative z direction
			// positive X
			new Vector4(2, 1, 1, 1), // negative X
			new Vector4(0, 1, 1, 1), // positive Z
			new Vector4(3, 1, 1, 1), // negative Z
			new Vector4(1, 1, 1, 1), // positive Y
			new Vector4(3, 0, 1, 1), // negative Y
			new Vector4(1, 0, 1, 1)];
			this._cubeDirections = [new Vector3(1, 0, 0), new Vector3(-1, 0, 0), new Vector3(0, 0, 1), new Vector3(0, 0, -1), new Vector3(0, 1, 0), new Vector3(0, -1, 0)];
			this._cubeUps = [new Vector3(0, 1, 0), new Vector3(0, 1, 0), new Vector3(0, 1, 0), new Vector3(0, 1, 0), new Vector3(0, 0, 1), new Vector3(0, 0, -1)];
		}

		updateMatrices(light, viewportIndex = 0) {
			const camera = this.camera;
			const shadowMatrix = this.matrix;
			const far = light.distance || camera.far;

			if (far !== camera.far) {
				camera.far = far;
				camera.updateProjectionMatrix();
			}

			_lightPositionWorld.setFromMatrixPosition(light.matrixWorld);

			camera.position.copy(_lightPositionWorld);

			_lookTarget.copy(camera.position);

			_lookTarget.add(this._cubeDirections[viewportIndex]);

			camera.up.copy(this._cubeUps[viewportIndex]);
			camera.lookAt(_lookTarget);
			camera.updateMatrixWorld();
			shadowMatrix.makeTranslation(-_lightPositionWorld.x, -_lightPositionWorld.y, -_lightPositionWorld.z);

			_projScreenMatrix.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);

			this._frustum.setFromProjectionMatrix(_projScreenMatrix);
		}

	}

	class PointLight extends Light {
		constructor(color, intensity, distance = 0, decay = 1) {
			super(color, intensity);
			this.isPointLight = true;
			this.type = 'PointLight';
			this.distance = distance;
			this.decay = decay; // for physically correct lights, should be 2.

			this.shadow = new PointLightShadow();
		}

		get power() {
			// compute the light's luminous power (in lumens) from its intensity (in candela)
			// for an isotropic light source, luminous power (lm) = 4 π luminous intensity (cd)
			return this.intensity * 4 * Math.PI;
		}

		set power(power) {
			// set the light's intensity (in candela) from the desired luminous power (in lumens)
			this.intensity = power / (4 * Math.PI);
		}

		dispose() {
			this.shadow.dispose();
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.distance = source.distance;
			this.decay = source.decay;
			this.shadow = source.shadow.clone();
			return this;
		}

	}

	class DirectionalLightShadow extends LightShadow {
		constructor() {
			super(new OrthographicCamera(-5, 5, 5, -5, 0.5, 500));
			this.isDirectionalLightShadow = true;
		}

	}

	class DirectionalLight extends Light {
		constructor(color, intensity) {
			super(color, intensity);
			this.isDirectionalLight = true;
			this.type = 'DirectionalLight';
			this.position.copy(Object3D.DefaultUp);
			this.updateMatrix();
			this.target = new Object3D();
			this.shadow = new DirectionalLightShadow();
		}

		dispose() {
			this.shadow.dispose();
		}

		copy(source) {
			super.copy(source);
			this.target = source.target.clone();
			this.shadow = source.shadow.clone();
			return this;
		}

	}

	class AmbientLight extends Light {
		constructor(color, intensity) {
			super(color, intensity);
			this.isAmbientLight = true;
			this.type = 'AmbientLight';
		}

	}

	class RectAreaLight extends Light {
		constructor(color, intensity, width = 10, height = 10) {
			super(color, intensity);
			this.isRectAreaLight = true;
			this.type = 'RectAreaLight';
			this.width = width;
			this.height = height;
		}

		get power() {
			// compute the light's luminous power (in lumens) from its intensity (in nits)
			return this.intensity * this.width * this.height * Math.PI;
		}

		set power(power) {
			// set the light's intensity (in nits) from the desired luminous power (in lumens)
			this.intensity = power / (this.width * this.height * Math.PI);
		}

		copy(source) {
			super.copy(source);
			this.width = source.width;
			this.height = source.height;
			return this;
		}

		toJSON(meta) {
			const data = super.toJSON(meta);
			data.object.width = this.width;
			data.object.height = this.height;
			return data;
		}

	}

	/**
	 * Primary reference:
	 *	 https://graphics.stanford.edu/papers/envmap/envmap.pdf
	 *
	 * Secondary reference:
	 *	 https://www.ppsloan.org/publications/StupidSH36.pdf
	 */
	// 3-band SH defined by 9 coefficients

	class SphericalHarmonics3 {
		constructor() {
			this.isSphericalHarmonics3 = true;
			this.coefficients = [];

			for (let i = 0; i < 9; i++) {
				this.coefficients.push(new Vector3());
			}
		}

		set(coefficients) {
			for (let i = 0; i < 9; i++) {
				this.coefficients[i].copy(coefficients[i]);
			}

			return this;
		}

		zero() {
			for (let i = 0; i < 9; i++) {
				this.coefficients[i].set(0, 0, 0);
			}

			return this;
		} // get the radiance in the direction of the normal
		// target is a Vector3


		getAt(normal, target) {
			// normal is assumed to be unit length
			const x = normal.x,
						y = normal.y,
						z = normal.z;
			const coeff = this.coefficients; // band 0

			target.copy(coeff[0]).multiplyScalar(0.282095); // band 1

			target.addScaledVector(coeff[1], 0.488603 * y);
			target.addScaledVector(coeff[2], 0.488603 * z);
			target.addScaledVector(coeff[3], 0.488603 * x); // band 2

			target.addScaledVector(coeff[4], 1.092548 * (x * y));
			target.addScaledVector(coeff[5], 1.092548 * (y * z));
			target.addScaledVector(coeff[6], 0.315392 * (3.0 * z * z - 1.0));
			target.addScaledVector(coeff[7], 1.092548 * (x * z));
			target.addScaledVector(coeff[8], 0.546274 * (x * x - y * y));
			return target;
		} // get the irradiance (radiance convolved with cosine lobe) in the direction of the normal
		// target is a Vector3
		// https://graphics.stanford.edu/papers/envmap/envmap.pdf


		getIrradianceAt(normal, target) {
			// normal is assumed to be unit length
			const x = normal.x,
						y = normal.y,
						z = normal.z;
			const coeff = this.coefficients; // band 0

			target.copy(coeff[0]).multiplyScalar(0.886227); // π * 0.282095
			// band 1

			target.addScaledVector(coeff[1], 2.0 * 0.511664 * y); // ( 2 * π / 3 ) * 0.488603

			target.addScaledVector(coeff[2], 2.0 * 0.511664 * z);
			target.addScaledVector(coeff[3], 2.0 * 0.511664 * x); // band 2

			target.addScaledVector(coeff[4], 2.0 * 0.429043 * x * y); // ( π / 4 ) * 1.092548

			target.addScaledVector(coeff[5], 2.0 * 0.429043 * y * z);
			target.addScaledVector(coeff[6], 0.743125 * z * z - 0.247708); // ( π / 4 ) * 0.315392 * 3

			target.addScaledVector(coeff[7], 2.0 * 0.429043 * x * z);
			target.addScaledVector(coeff[8], 0.429043 * (x * x - y * y)); // ( π / 4 ) * 0.546274

			return target;
		}

		add(sh) {
			for (let i = 0; i < 9; i++) {
				this.coefficients[i].add(sh.coefficients[i]);
			}

			return this;
		}

		addScaledSH(sh, s) {
			for (let i = 0; i < 9; i++) {
				this.coefficients[i].addScaledVector(sh.coefficients[i], s);
			}

			return this;
		}

		scale(s) {
			for (let i = 0; i < 9; i++) {
				this.coefficients[i].multiplyScalar(s);
			}

			return this;
		}

		lerp(sh, alpha) {
			for (let i = 0; i < 9; i++) {
				this.coefficients[i].lerp(sh.coefficients[i], alpha);
			}

			return this;
		}

		equals(sh) {
			for (let i = 0; i < 9; i++) {
				if (!this.coefficients[i].equals(sh.coefficients[i])) {
					return false;
				}
			}

			return true;
		}

		copy(sh) {
			return this.set(sh.coefficients);
		}

		clone() {
			return new this.constructor().copy(this);
		}

		fromArray(array, offset = 0) {
			const coefficients = this.coefficients;

			for (let i = 0; i < 9; i++) {
				coefficients[i].fromArray(array, offset + i * 3);
			}

			return this;
		}

		toArray(array = [], offset = 0) {
			const coefficients = this.coefficients;

			for (let i = 0; i < 9; i++) {
				coefficients[i].toArray(array, offset + i * 3);
			}

			return array;
		} // evaluate the basis functions
		// shBasis is an Array[ 9 ]


		static getBasisAt(normal, shBasis) {
			// normal is assumed to be unit length
			const x = normal.x,
						y = normal.y,
						z = normal.z; // band 0

			shBasis[0] = 0.282095; // band 1

			shBasis[1] = 0.488603 * y;
			shBasis[2] = 0.488603 * z;
			shBasis[3] = 0.488603 * x; // band 2

			shBasis[4] = 1.092548 * x * y;
			shBasis[5] = 1.092548 * y * z;
			shBasis[6] = 0.315392 * (3 * z * z - 1);
			shBasis[7] = 1.092548 * x * z;
			shBasis[8] = 0.546274 * (x * x - y * y);
		}

	}

	class LightProbe extends Light {
		constructor(sh = new SphericalHarmonics3(), intensity = 1) {
			super(undefined, intensity);
			this.isLightProbe = true;
			this.sh = sh;
		}

		copy(source) {
			super.copy(source);
			this.sh.copy(source.sh);
			return this;
		}

		fromJSON(json) {
			this.intensity = json.intensity; // TODO: Move this bit to Light.fromJSON();

			this.sh.fromArray(json.sh);
			return this;
		}

		toJSON(meta) {
			const data = super.toJSON(meta);
			data.object.sh = this.sh.toArray();
			return data;
		}

	}

	class MaterialLoader extends Loader {
		constructor(manager) {
			super(manager);
			this.textures = {};
		}

		load(url, onLoad, onProgress, onError) {
			const scope = this;
			const loader = new FileLoader(scope.manager);
			loader.setPath(scope.path);
			loader.setRequestHeader(scope.requestHeader);
			loader.setWithCredentials(scope.withCredentials);
			loader.load(url, function (text) {
				try {
					onLoad(scope.parse(JSON.parse(text)));
				} catch (e) {
					if (onError) {
						onError(e);
					} else {
						console.error(e);
					}

					scope.manager.itemError(url);
				}
			}, onProgress, onError);
		}

		parse(json) {
			const textures = this.textures;

			function getTexture(name) {
				if (textures[name] === undefined) {
					console.warn('THREE.MaterialLoader: Undefined texture', name);
				}

				return textures[name];
			}

			const material = MaterialLoader.createMaterialFromType(json.type);
			if (json.uuid !== undefined) material.uuid = json.uuid;
			if (json.name !== undefined) material.name = json.name;
			if (json.color !== undefined && material.color !== undefined) material.color.setHex(json.color);
			if (json.roughness !== undefined) material.roughness = json.roughness;
			if (json.metalness !== undefined) material.metalness = json.metalness;
			if (json.sheen !== undefined) material.sheen = json.sheen;
			if (json.sheenColor !== undefined) material.sheenColor = new Color().setHex(json.sheenColor);
			if (json.sheenRoughness !== undefined) material.sheenRoughness = json.sheenRoughness;
			if (json.emissive !== undefined && material.emissive !== undefined) material.emissive.setHex(json.emissive);
			if (json.specular !== undefined && material.specular !== undefined) material.specular.setHex(json.specular);
			if (json.specularIntensity !== undefined) material.specularIntensity = json.specularIntensity;
			if (json.specularColor !== undefined && material.specularColor !== undefined) material.specularColor.setHex(json.specularColor);
			if (json.shininess !== undefined) material.shininess = json.shininess;
			if (json.clearcoat !== undefined) material.clearcoat = json.clearcoat;
			if (json.clearcoatRoughness !== undefined) material.clearcoatRoughness = json.clearcoatRoughness;
			if (json.iridescence !== undefined) material.iridescence = json.iridescence;
			if (json.iridescenceIOR !== undefined) material.iridescenceIOR = json.iridescenceIOR;
			if (json.iridescenceThicknessRange !== undefined) material.iridescenceThicknessRange = json.iridescenceThicknessRange;
			if (json.transmission !== undefined) material.transmission = json.transmission;
			if (json.thickness !== undefined) material.thickness = json.thickness;
			if (json.attenuationDistance !== undefined) material.attenuationDistance = json.attenuationDistance;
			if (json.attenuationColor !== undefined && material.attenuationColor !== undefined) material.attenuationColor.setHex(json.attenuationColor);
			if (json.fog !== undefined) material.fog = json.fog;
			if (json.flatShading !== undefined) material.flatShading = json.flatShading;
			if (json.blending !== undefined) material.blending = json.blending;
			if (json.combine !== undefined) material.combine = json.combine;
			if (json.side !== undefined) material.side = json.side;
			if (json.shadowSide !== undefined) material.shadowSide = json.shadowSide;
			if (json.opacity !== undefined) material.opacity = json.opacity;
			if (json.transparent !== undefined) material.transparent = json.transparent;
			if (json.alphaTest !== undefined) material.alphaTest = json.alphaTest;
			if (json.depthTest !== undefined) material.depthTest = json.depthTest;
			if (json.depthWrite !== undefined) material.depthWrite = json.depthWrite;
			if (json.colorWrite !== undefined) material.colorWrite = json.colorWrite;
			if (json.stencilWrite !== undefined) material.stencilWrite = json.stencilWrite;
			if (json.stencilWriteMask !== undefined) material.stencilWriteMask = json.stencilWriteMask;
			if (json.stencilFunc !== undefined) material.stencilFunc = json.stencilFunc;
			if (json.stencilRef !== undefined) material.stencilRef = json.stencilRef;
			if (json.stencilFuncMask !== undefined) material.stencilFuncMask = json.stencilFuncMask;
			if (json.stencilFail !== undefined) material.stencilFail = json.stencilFail;
			if (json.stencilZFail !== undefined) material.stencilZFail = json.stencilZFail;
			if (json.stencilZPass !== undefined) material.stencilZPass = json.stencilZPass;
			if (json.wireframe !== undefined) material.wireframe = json.wireframe;
			if (json.wireframeLinewidth !== undefined) material.wireframeLinewidth = json.wireframeLinewidth;
			if (json.wireframeLinecap !== undefined) material.wireframeLinecap = json.wireframeLinecap;
			if (json.wireframeLinejoin !== undefined) material.wireframeLinejoin = json.wireframeLinejoin;
			if (json.rotation !== undefined) material.rotation = json.rotation;
			if (json.linewidth !== 1) material.linewidth = json.linewidth;
			if (json.dashSize !== undefined) material.dashSize = json.dashSize;
			if (json.gapSize !== undefined) material.gapSize = json.gapSize;
			if (json.scale !== undefined) material.scale = json.scale;
			if (json.polygonOffset !== undefined) material.polygonOffset = json.polygonOffset;
			if (json.polygonOffsetFactor !== undefined) material.polygonOffsetFactor = json.polygonOffsetFactor;
			if (json.polygonOffsetUnits !== undefined) material.polygonOffsetUnits = json.polygonOffsetUnits;
			if (json.dithering !== undefined) material.dithering = json.dithering;
			if (json.alphaToCoverage !== undefined) material.alphaToCoverage = json.alphaToCoverage;
			if (json.premultipliedAlpha !== undefined) material.premultipliedAlpha = json.premultipliedAlpha;
			if (json.visible !== undefined) material.visible = json.visible;
			if (json.toneMapped !== undefined) material.toneMapped = json.toneMapped;
			if (json.userData !== undefined) material.userData = json.userData;

			if (json.vertexColors !== undefined) {
				if (typeof json.vertexColors === 'number') {
					material.vertexColors = json.vertexColors > 0 ? true : false;
				} else {
					material.vertexColors = json.vertexColors;
				}
			} // Shader Material


			if (json.uniforms !== undefined) {
				for (const name in json.uniforms) {
					const uniform = json.uniforms[name];
					material.uniforms[name] = {};

					switch (uniform.type) {
						case 't':
							material.uniforms[name].value = getTexture(uniform.value);
							break;

						case 'c':
							material.uniforms[name].value = new Color().setHex(uniform.value);
							break;

						case 'v2':
							material.uniforms[name].value = new Vector2().fromArray(uniform.value);
							break;

						case 'v3':
							material.uniforms[name].value = new Vector3().fromArray(uniform.value);
							break;

						case 'v4':
							material.uniforms[name].value = new Vector4().fromArray(uniform.value);
							break;

						case 'm3':
							material.uniforms[name].value = new Matrix3().fromArray(uniform.value);
							break;

						case 'm4':
							material.uniforms[name].value = new Matrix4().fromArray(uniform.value);
							break;

						default:
							material.uniforms[name].value = uniform.value;
					}
				}
			}

			if (json.defines !== undefined) material.defines = json.defines;
			if (json.vertexShader !== undefined) material.vertexShader = json.vertexShader;
			if (json.fragmentShader !== undefined) material.fragmentShader = json.fragmentShader;

			if (json.extensions !== undefined) {
				for (const key in json.extensions) {
					material.extensions[key] = json.extensions[key];
				}
			} // Deprecated


			if (json.shading !== undefined) material.flatShading = json.shading === 1; // THREE.FlatShading
			// for PointsMaterial

			if (json.size !== undefined) material.size = json.size;
			if (json.sizeAttenuation !== undefined) material.sizeAttenuation = json.sizeAttenuation; // maps

			if (json.map !== undefined) material.map = getTexture(json.map);
			if (json.matcap !== undefined) material.matcap = getTexture(json.matcap);
			if (json.alphaMap !== undefined) material.alphaMap = getTexture(json.alphaMap);
			if (json.bumpMap !== undefined) material.bumpMap = getTexture(json.bumpMap);
			if (json.bumpScale !== undefined) material.bumpScale = json.bumpScale;
			if (json.normalMap !== undefined) material.normalMap = getTexture(json.normalMap);
			if (json.normalMapType !== undefined) material.normalMapType = json.normalMapType;

			if (json.normalScale !== undefined) {
				let normalScale = json.normalScale;

				if (Array.isArray(normalScale) === false) {
					// Blender exporter used to export a scalar. See #7459
					normalScale = [normalScale, normalScale];
				}

				material.normalScale = new Vector2().fromArray(normalScale);
			}

			if (json.displacementMap !== undefined) material.displacementMap = getTexture(json.displacementMap);
			if (json.displacementScale !== undefined) material.displacementScale = json.displacementScale;
			if (json.displacementBias !== undefined) material.displacementBias = json.displacementBias;
			if (json.roughnessMap !== undefined) material.roughnessMap = getTexture(json.roughnessMap);
			if (json.metalnessMap !== undefined) material.metalnessMap = getTexture(json.metalnessMap);
			if (json.emissiveMap !== undefined) material.emissiveMap = getTexture(json.emissiveMap);
			if (json.emissiveIntensity !== undefined) material.emissiveIntensity = json.emissiveIntensity;
			if (json.specularMap !== undefined) material.specularMap = getTexture(json.specularMap);
			if (json.specularIntensityMap !== undefined) material.specularIntensityMap = getTexture(json.specularIntensityMap);
			if (json.specularColorMap !== undefined) material.specularColorMap = getTexture(json.specularColorMap);
			if (json.envMap !== undefined) material.envMap = getTexture(json.envMap);
			if (json.envMapIntensity !== undefined) material.envMapIntensity = json.envMapIntensity;
			if (json.reflectivity !== undefined) material.reflectivity = json.reflectivity;
			if (json.refractionRatio !== undefined) material.refractionRatio = json.refractionRatio;
			if (json.lightMap !== undefined) material.lightMap = getTexture(json.lightMap);
			if (json.lightMapIntensity !== undefined) material.lightMapIntensity = json.lightMapIntensity;
			if (json.aoMap !== undefined) material.aoMap = getTexture(json.aoMap);
			if (json.aoMapIntensity !== undefined) material.aoMapIntensity = json.aoMapIntensity;
			if (json.gradientMap !== undefined) material.gradientMap = getTexture(json.gradientMap);
			if (json.clearcoatMap !== undefined) material.clearcoatMap = getTexture(json.clearcoatMap);
			if (json.clearcoatRoughnessMap !== undefined) material.clearcoatRoughnessMap = getTexture(json.clearcoatRoughnessMap);
			if (json.clearcoatNormalMap !== undefined) material.clearcoatNormalMap = getTexture(json.clearcoatNormalMap);
			if (json.clearcoatNormalScale !== undefined) material.clearcoatNormalScale = new Vector2().fromArray(json.clearcoatNormalScale);
			if (json.iridescenceMap !== undefined) material.iridescenceMap = getTexture(json.iridescenceMap);
			if (json.iridescenceThicknessMap !== undefined) material.iridescenceThicknessMap = getTexture(json.iridescenceThicknessMap);
			if (json.transmissionMap !== undefined) material.transmissionMap = getTexture(json.transmissionMap);
			if (json.thicknessMap !== undefined) material.thicknessMap = getTexture(json.thicknessMap);
			if (json.sheenColorMap !== undefined) material.sheenColorMap = getTexture(json.sheenColorMap);
			if (json.sheenRoughnessMap !== undefined) material.sheenRoughnessMap = getTexture(json.sheenRoughnessMap);
			return material;
		}

		setTextures(value) {
			this.textures = value;
			return this;
		}

		static createMaterialFromType(type) {
			const materialLib = {
				ShadowMaterial,
				SpriteMaterial,
				RawShaderMaterial,
				ShaderMaterial,
				PointsMaterial,
				MeshPhysicalMaterial,
				MeshStandardMaterial,
				MeshPhongMaterial,
				MeshToonMaterial,
				MeshNormalMaterial,
				MeshLambertMaterial,
				MeshDepthMaterial,
				MeshDistanceMaterial,
				MeshBasicMaterial,
				MeshMatcapMaterial,
				LineDashedMaterial,
				LineBasicMaterial,
				Material
			};
			return new materialLib[type]();
		}

	}

	class LoaderUtils {
		static decodeText(array) {
			if (typeof TextDecoder !== 'undefined') {
				return new TextDecoder().decode(array);
			} // Avoid the String.fromCharCode.apply(null, array) shortcut, which
			// throws a "maximum call stack size exceeded" error for large arrays.


			let s = '';

			for (let i = 0, il = array.length; i < il; i++) {
				// Implicitly assumes little-endian.
				s += String.fromCharCode(array[i]);
			}

			try {
				// merges multi-byte utf-8 characters.
				return decodeURIComponent(escape(s));
			} catch (e) {
				// see #16358
				return s;
			}
		}

		static extractUrlBase(url) {
			const index = url.lastIndexOf('/');
			if (index === -1) return './';
			return url.slice(0, index + 1);
		}

		static resolveURL(url, path) {
			// Invalid URL
			if (typeof url !== 'string' || url === '') return ''; // Host Relative URL

			if (/^https?:\/\//i.test(path) && /^\//.test(url)) {
				path = path.replace(/(^https?:\/\/[^\/]+).*/i, '$1');
			} // Absolute URL http://,https://,//


			if (/^(https?:)?\/\//i.test(url)) return url; // Data URI

			if (/^data:.*,.*$/i.test(url)) return url; // Blob URL

			if (/^blob:.*$/i.test(url)) return url; // Relative URL

			return path + url;
		}

	}

	class InstancedBufferGeometry extends BufferGeometry {
		constructor() {
			super();
			this.isInstancedBufferGeometry = true;
			this.type = 'InstancedBufferGeometry';
			this.instanceCount = Infinity;
		}

		copy(source) {
			super.copy(source);
			this.instanceCount = source.instanceCount;
			return this;
		}

		clone() {
			return new this.constructor().copy(this);
		}

		toJSON() {
			const data = super.toJSON(this);
			data.instanceCount = this.instanceCount;
			data.isInstancedBufferGeometry = true;
			return data;
		}

	}

	class BufferGeometryLoader extends Loader {
		constructor(manager) {
			super(manager);
		}

		load(url, onLoad, onProgress, onError) {
			const scope = this;
			const loader = new FileLoader(scope.manager);
			loader.setPath(scope.path);
			loader.setRequestHeader(scope.requestHeader);
			loader.setWithCredentials(scope.withCredentials);
			loader.load(url, function (text) {
				try {
					onLoad(scope.parse(JSON.parse(text)));
				} catch (e) {
					if (onError) {
						onError(e);
					} else {
						console.error(e);
					}

					scope.manager.itemError(url);
				}
			}, onProgress, onError);
		}

		parse(json) {
			const interleavedBufferMap = {};
			const arrayBufferMap = {};

			function getInterleavedBuffer(json, uuid) {
				if (interleavedBufferMap[uuid] !== undefined) return interleavedBufferMap[uuid];
				const interleavedBuffers = json.interleavedBuffers;
				const interleavedBuffer = interleavedBuffers[uuid];
				const buffer = getArrayBuffer(json, interleavedBuffer.buffer);
				const array = getTypedArray(interleavedBuffer.type, buffer);
				const ib = new InterleavedBuffer(array, interleavedBuffer.stride);
				ib.uuid = interleavedBuffer.uuid;
				interleavedBufferMap[uuid] = ib;
				return ib;
			}

			function getArrayBuffer(json, uuid) {
				if (arrayBufferMap[uuid] !== undefined) return arrayBufferMap[uuid];
				const arrayBuffers = json.arrayBuffers;
				const arrayBuffer = arrayBuffers[uuid];
				const ab = new Uint32Array(arrayBuffer).buffer;
				arrayBufferMap[uuid] = ab;
				return ab;
			}

			const geometry = json.isInstancedBufferGeometry ? new InstancedBufferGeometry() : new BufferGeometry();
			const index = json.data.index;

			if (index !== undefined) {
				const typedArray = getTypedArray(index.type, index.array);
				geometry.setIndex(new BufferAttribute(typedArray, 1));
			}

			const attributes = json.data.attributes;

			for (const key in attributes) {
				const attribute = attributes[key];
				let bufferAttribute;

				if (attribute.isInterleavedBufferAttribute) {
					const interleavedBuffer = getInterleavedBuffer(json.data, attribute.data);
					bufferAttribute = new InterleavedBufferAttribute(interleavedBuffer, attribute.itemSize, attribute.offset, attribute.normalized);
				} else {
					const typedArray = getTypedArray(attribute.type, attribute.array);
					const bufferAttributeConstr = attribute.isInstancedBufferAttribute ? InstancedBufferAttribute : BufferAttribute;
					bufferAttribute = new bufferAttributeConstr(typedArray, attribute.itemSize, attribute.normalized);
				}

				if (attribute.name !== undefined) bufferAttribute.name = attribute.name;
				if (attribute.usage !== undefined) bufferAttribute.setUsage(attribute.usage);

				if (attribute.updateRange !== undefined) {
					bufferAttribute.updateRange.offset = attribute.updateRange.offset;
					bufferAttribute.updateRange.count = attribute.updateRange.count;
				}

				geometry.setAttribute(key, bufferAttribute);
			}

			const morphAttributes = json.data.morphAttributes;

			if (morphAttributes) {
				for (const key in morphAttributes) {
					const attributeArray = morphAttributes[key];
					const array = [];

					for (let i = 0, il = attributeArray.length; i < il; i++) {
						const attribute = attributeArray[i];
						let bufferAttribute;

						if (attribute.isInterleavedBufferAttribute) {
							const interleavedBuffer = getInterleavedBuffer(json.data, attribute.data);
							bufferAttribute = new InterleavedBufferAttribute(interleavedBuffer, attribute.itemSize, attribute.offset, attribute.normalized);
						} else {
							const typedArray = getTypedArray(attribute.type, attribute.array);
							bufferAttribute = new BufferAttribute(typedArray, attribute.itemSize, attribute.normalized);
						}

						if (attribute.name !== undefined) bufferAttribute.name = attribute.name;
						array.push(bufferAttribute);
					}

					geometry.morphAttributes[key] = array;
				}
			}

			const morphTargetsRelative = json.data.morphTargetsRelative;

			if (morphTargetsRelative) {
				geometry.morphTargetsRelative = true;
			}

			const groups = json.data.groups || json.data.drawcalls || json.data.offsets;

			if (groups !== undefined) {
				for (let i = 0, n = groups.length; i !== n; ++i) {
					const group = groups[i];
					geometry.addGroup(group.start, group.count, group.materialIndex);
				}
			}

			const boundingSphere = json.data.boundingSphere;

			if (boundingSphere !== undefined) {
				const center = new Vector3();

				if (boundingSphere.center !== undefined) {
					center.fromArray(boundingSphere.center);
				}

				geometry.boundingSphere = new Sphere(center, boundingSphere.radius);
			}

			if (json.name) geometry.name = json.name;
			if (json.userData) geometry.userData = json.userData;
			return geometry;
		}

	}

	class ObjectLoader extends Loader {
		constructor(manager) {
			super(manager);
		}

		load(url, onLoad, onProgress, onError) {
			const scope = this;
			const path = this.path === '' ? LoaderUtils.extractUrlBase(url) : this.path;
			this.resourcePath = this.resourcePath || path;
			const loader = new FileLoader(this.manager);
			loader.setPath(this.path);
			loader.setRequestHeader(this.requestHeader);
			loader.setWithCredentials(this.withCredentials);
			loader.load(url, function (text) {
				let json = null;

				try {
					json = JSON.parse(text);
				} catch (error) {
					if (onError !== undefined) onError(error);
					console.error('THREE:ObjectLoader: Can\'t parse ' + url + '.', error.message);
					return;
				}

				const metadata = json.metadata;

				if (metadata === undefined || metadata.type === undefined || metadata.type.toLowerCase() === 'geometry') {
					console.error('THREE.ObjectLoader: Can\'t load ' + url);
					return;
				}

				scope.parse(json, onLoad);
			}, onProgress, onError);
		}

		async loadAsync(url, onProgress) {
			const scope = this;
			const path = this.path === '' ? LoaderUtils.extractUrlBase(url) : this.path;
			this.resourcePath = this.resourcePath || path;
			const loader = new FileLoader(this.manager);
			loader.setPath(this.path);
			loader.setRequestHeader(this.requestHeader);
			loader.setWithCredentials(this.withCredentials);
			const text = await loader.loadAsync(url, onProgress);
			const json = JSON.parse(text);
			const metadata = json.metadata;

			if (metadata === undefined || metadata.type === undefined || metadata.type.toLowerCase() === 'geometry') {
				throw new Error('THREE.ObjectLoader: Can\'t load ' + url);
			}

			return await scope.parseAsync(json);
		}

		parse(json, onLoad) {
			const animations = this.parseAnimations(json.animations);
			const shapes = this.parseShapes(json.shapes);
			const geometries = this.parseGeometries(json.geometries, shapes);
			const images = this.parseImages(json.images, function () {
				if (onLoad !== undefined) onLoad(object);
			});
			const textures = this.parseTextures(json.textures, images);
			const materials = this.parseMaterials(json.materials, textures);
			const object = this.parseObject(json.object, geometries, materials, textures, animations);
			const skeletons = this.parseSkeletons(json.skeletons, object);
			this.bindSkeletons(object, skeletons); //

			if (onLoad !== undefined) {
				let hasImages = false;

				for (const uuid in images) {
					if (images[uuid].data instanceof HTMLImageElement) {
						hasImages = true;
						break;
					}
				}

				if (hasImages === false) onLoad(object);
			}

			return object;
		}

		async parseAsync(json) {
			const animations = this.parseAnimations(json.animations);
			const shapes = this.parseShapes(json.shapes);
			const geometries = this.parseGeometries(json.geometries, shapes);
			const images = await this.parseImagesAsync(json.images);
			const textures = this.parseTextures(json.textures, images);
			const materials = this.parseMaterials(json.materials, textures);
			const object = this.parseObject(json.object, geometries, materials, textures, animations);
			const skeletons = this.parseSkeletons(json.skeletons, object);
			this.bindSkeletons(object, skeletons);
			return object;
		}

		parseShapes(json) {
			const shapes = {};

			if (json !== undefined) {
				for (let i = 0, l = json.length; i < l; i++) {
					const shape = new Shape().fromJSON(json[i]);
					shapes[shape.uuid] = shape;
				}
			}

			return shapes;
		}

		parseSkeletons(json, object) {
			const skeletons = {};
			const bones = {}; // generate bone lookup table

			object.traverse(function (child) {
				if (child.isBone) bones[child.uuid] = child;
			}); // create skeletons

			if (json !== undefined) {
				for (let i = 0, l = json.length; i < l; i++) {
					const skeleton = new Skeleton().fromJSON(json[i], bones);
					skeletons[skeleton.uuid] = skeleton;
				}
			}

			return skeletons;
		}

		parseGeometries(json, shapes) {
			const geometries = {};

			if (json !== undefined) {
				const bufferGeometryLoader = new BufferGeometryLoader();

				for (let i = 0, l = json.length; i < l; i++) {
					let geometry;
					const data = json[i];

					switch (data.type) {
						case 'BufferGeometry':
						case 'InstancedBufferGeometry':
							geometry = bufferGeometryLoader.parse(data);
							break;

						case 'Geometry':
							console.error('THREE.ObjectLoader: The legacy Geometry type is no longer supported.');
							break;

						default:
							if (data.type in Geometries) {
								geometry = Geometries[data.type].fromJSON(data, shapes);
							} else {
								console.warn(`THREE.ObjectLoader: Unsupported geometry type "${data.type}"`);
							}

					}

					geometry.uuid = data.uuid;
					if (data.name !== undefined) geometry.name = data.name;
					if (geometry.isBufferGeometry === true && data.userData !== undefined) geometry.userData = data.userData;
					geometries[data.uuid] = geometry;
				}
			}

			return geometries;
		}

		parseMaterials(json, textures) {
			const cache = {}; // MultiMaterial

			const materials = {};

			if (json !== undefined) {
				const loader = new MaterialLoader();
				loader.setTextures(textures);

				for (let i = 0, l = json.length; i < l; i++) {
					const data = json[i];

					if (data.type === 'MultiMaterial') {
						// Deprecated
						const array = [];

						for (let j = 0; j < data.materials.length; j++) {
							const material = data.materials[j];

							if (cache[material.uuid] === undefined) {
								cache[material.uuid] = loader.parse(material);
							}

							array.push(cache[material.uuid]);
						}

						materials[data.uuid] = array;
					} else {
						if (cache[data.uuid] === undefined) {
							cache[data.uuid] = loader.parse(data);
						}

						materials[data.uuid] = cache[data.uuid];
					}
				}
			}

			return materials;
		}

		parseAnimations(json) {
			const animations = {};

			if (json !== undefined) {
				for (let i = 0; i < json.length; i++) {
					const data = json[i];
					const clip = AnimationClip.parse(data);
					animations[clip.uuid] = clip;
				}
			}

			return animations;
		}

		parseImages(json, onLoad) {
			const scope = this;
			const images = {};
			let loader;

			function loadImage(url) {
				scope.manager.itemStart(url);
				return loader.load(url, function () {
					scope.manager.itemEnd(url);
				}, undefined, function () {
					scope.manager.itemError(url);
					scope.manager.itemEnd(url);
				});
			}

			function deserializeImage(image) {
				if (typeof image === 'string') {
					const url = image;
					const path = /^(\/\/)|([a-z]+:(\/\/)?)/i.test(url) ? url : scope.resourcePath + url;
					return loadImage(path);
				} else {
					if (image.data) {
						return {
							data: getTypedArray(image.type, image.data),
							width: image.width,
							height: image.height
						};
					} else {
						return null;
					}
				}
			}

			if (json !== undefined && json.length > 0) {
				const manager = new LoadingManager(onLoad);
				loader = new ImageLoader(manager);
				loader.setCrossOrigin(this.crossOrigin);

				for (let i = 0, il = json.length; i < il; i++) {
					const image = json[i];
					const url = image.url;

					if (Array.isArray(url)) {
						// load array of images e.g CubeTexture
						const imageArray = [];

						for (let j = 0, jl = url.length; j < jl; j++) {
							const currentUrl = url[j];
							const deserializedImage = deserializeImage(currentUrl);

							if (deserializedImage !== null) {
								if (deserializedImage instanceof HTMLImageElement) {
									imageArray.push(deserializedImage);
								} else {
									// special case: handle array of data textures for cube textures
									imageArray.push(new DataTexture(deserializedImage.data, deserializedImage.width, deserializedImage.height));
								}
							}
						}

						images[image.uuid] = new Source(imageArray);
					} else {
						// load single image
						const deserializedImage = deserializeImage(image.url);
						images[image.uuid] = new Source(deserializedImage);
					}
				}
			}

			return images;
		}

		async parseImagesAsync(json) {
			const scope = this;
			const images = {};
			let loader;

			async function deserializeImage(image) {
				if (typeof image === 'string') {
					const url = image;
					const path = /^(\/\/)|([a-z]+:(\/\/)?)/i.test(url) ? url : scope.resourcePath + url;
					return await loader.loadAsync(path);
				} else {
					if (image.data) {
						return {
							data: getTypedArray(image.type, image.data),
							width: image.width,
							height: image.height
						};
					} else {
						return null;
					}
				}
			}

			if (json !== undefined && json.length > 0) {
				loader = new ImageLoader(this.manager);
				loader.setCrossOrigin(this.crossOrigin);

				for (let i = 0, il = json.length; i < il; i++) {
					const image = json[i];
					const url = image.url;

					if (Array.isArray(url)) {
						// load array of images e.g CubeTexture
						const imageArray = [];

						for (let j = 0, jl = url.length; j < jl; j++) {
							const currentUrl = url[j];
							const deserializedImage = await deserializeImage(currentUrl);

							if (deserializedImage !== null) {
								if (deserializedImage instanceof HTMLImageElement) {
									imageArray.push(deserializedImage);
								} else {
									// special case: handle array of data textures for cube textures
									imageArray.push(new DataTexture(deserializedImage.data, deserializedImage.width, deserializedImage.height));
								}
							}
						}

						images[image.uuid] = new Source(imageArray);
					} else {
						// load single image
						const deserializedImage = await deserializeImage(image.url);
						images[image.uuid] = new Source(deserializedImage);
					}
				}
			}

			return images;
		}

		parseTextures(json, images) {
			function parseConstant(value, type) {
				if (typeof value === 'number') return value;
				console.warn('THREE.ObjectLoader.parseTexture: Constant should be in numeric form.', value);
				return type[value];
			}

			const textures = {};

			if (json !== undefined) {
				for (let i = 0, l = json.length; i < l; i++) {
					const data = json[i];

					if (data.image === undefined) {
						console.warn('THREE.ObjectLoader: No "image" specified for', data.uuid);
					}

					if (images[data.image] === undefined) {
						console.warn('THREE.ObjectLoader: Undefined image', data.image);
					}

					const source = images[data.image];
					const image = source.data;
					let texture;

					if (Array.isArray(image)) {
						texture = new CubeTexture();
						if (image.length === 6) texture.needsUpdate = true;
					} else {
						if (image && image.data) {
							texture = new DataTexture();
						} else {
							texture = new Texture();
						}

						if (image) texture.needsUpdate = true; // textures can have undefined image data
					}

					texture.source = source;
					texture.uuid = data.uuid;
					if (data.name !== undefined) texture.name = data.name;
					if (data.mapping !== undefined) texture.mapping = parseConstant(data.mapping, TEXTURE_MAPPING);
					if (data.offset !== undefined) texture.offset.fromArray(data.offset);
					if (data.repeat !== undefined) texture.repeat.fromArray(data.repeat);
					if (data.center !== undefined) texture.center.fromArray(data.center);
					if (data.rotation !== undefined) texture.rotation = data.rotation;

					if (data.wrap !== undefined) {
						texture.wrapS = parseConstant(data.wrap[0], TEXTURE_WRAPPING);
						texture.wrapT = parseConstant(data.wrap[1], TEXTURE_WRAPPING);
					}

					if (data.format !== undefined) texture.format = data.format;
					if (data.type !== undefined) texture.type = data.type;
					if (data.encoding !== undefined) texture.encoding = data.encoding;
					if (data.minFilter !== undefined) texture.minFilter = parseConstant(data.minFilter, TEXTURE_FILTER);
					if (data.magFilter !== undefined) texture.magFilter = parseConstant(data.magFilter, TEXTURE_FILTER);
					if (data.anisotropy !== undefined) texture.anisotropy = data.anisotropy;
					if (data.flipY !== undefined) texture.flipY = data.flipY;
					if (data.premultiplyAlpha !== undefined) texture.premultiplyAlpha = data.premultiplyAlpha;
					if (data.unpackAlignment !== undefined) texture.unpackAlignment = data.unpackAlignment;
					if (data.userData !== undefined) texture.userData = data.userData;
					textures[data.uuid] = texture;
				}
			}

			return textures;
		}

		parseObject(data, geometries, materials, textures, animations) {
			let object;

			function getGeometry(name) {
				if (geometries[name] === undefined) {
					console.warn('THREE.ObjectLoader: Undefined geometry', name);
				}

				return geometries[name];
			}

			function getMaterial(name) {
				if (name === undefined) return undefined;

				if (Array.isArray(name)) {
					const array = [];

					for (let i = 0, l = name.length; i < l; i++) {
						const uuid = name[i];

						if (materials[uuid] === undefined) {
							console.warn('THREE.ObjectLoader: Undefined material', uuid);
						}

						array.push(materials[uuid]);
					}

					return array;
				}

				if (materials[name] === undefined) {
					console.warn('THREE.ObjectLoader: Undefined material', name);
				}

				return materials[name];
			}

			function getTexture(uuid) {
				if (textures[uuid] === undefined) {
					console.warn('THREE.ObjectLoader: Undefined texture', uuid);
				}

				return textures[uuid];
			}

			let geometry, material;

			switch (data.type) {
				case 'Scene':
					object = new Scene();

					if (data.background !== undefined) {
						if (Number.isInteger(data.background)) {
							object.background = new Color(data.background);
						} else {
							object.background = getTexture(data.background);
						}
					}

					if (data.environment !== undefined) {
						object.environment = getTexture(data.environment);
					}

					if (data.fog !== undefined) {
						if (data.fog.type === 'Fog') {
							object.fog = new Fog(data.fog.color, data.fog.near, data.fog.far);
						} else if (data.fog.type === 'FogExp2') {
							object.fog = new FogExp2(data.fog.color, data.fog.density);
						}
					}

					break;

				case 'PerspectiveCamera':
					object = new PerspectiveCamera(data.fov, data.aspect, data.near, data.far);
					if (data.focus !== undefined) object.focus = data.focus;
					if (data.zoom !== undefined) object.zoom = data.zoom;
					if (data.filmGauge !== undefined) object.filmGauge = data.filmGauge;
					if (data.filmOffset !== undefined) object.filmOffset = data.filmOffset;
					if (data.view !== undefined) object.view = Object.assign({}, data.view);
					break;

				case 'OrthographicCamera':
					object = new OrthographicCamera(data.left, data.right, data.top, data.bottom, data.near, data.far);
					if (data.zoom !== undefined) object.zoom = data.zoom;
					if (data.view !== undefined) object.view = Object.assign({}, data.view);
					break;

				case 'AmbientLight':
					object = new AmbientLight(data.color, data.intensity);
					break;

				case 'DirectionalLight':
					object = new DirectionalLight(data.color, data.intensity);
					break;

				case 'PointLight':
					object = new PointLight(data.color, data.intensity, data.distance, data.decay);
					break;

				case 'RectAreaLight':
					object = new RectAreaLight(data.color, data.intensity, data.width, data.height);
					break;

				case 'SpotLight':
					object = new SpotLight(data.color, data.intensity, data.distance, data.angle, data.penumbra, data.decay);
					break;

				case 'HemisphereLight':
					object = new HemisphereLight(data.color, data.groundColor, data.intensity);
					break;

				case 'LightProbe':
					object = new LightProbe().fromJSON(data);
					break;

				case 'SkinnedMesh':
					geometry = getGeometry(data.geometry);
					material = getMaterial(data.material);
					object = new SkinnedMesh(geometry, material);
					if (data.bindMode !== undefined) object.bindMode = data.bindMode;
					if (data.bindMatrix !== undefined) object.bindMatrix.fromArray(data.bindMatrix);
					if (data.skeleton !== undefined) object.skeleton = data.skeleton;
					break;

				case 'Mesh':
					geometry = getGeometry(data.geometry);
					material = getMaterial(data.material);
					object = new Mesh(geometry, material);
					break;

				case 'InstancedMesh':
					geometry = getGeometry(data.geometry);
					material = getMaterial(data.material);
					const count = data.count;
					const instanceMatrix = data.instanceMatrix;
					const instanceColor = data.instanceColor;
					object = new InstancedMesh(geometry, material, count);
					object.instanceMatrix = new InstancedBufferAttribute(new Float32Array(instanceMatrix.array), 16);
					if (instanceColor !== undefined) object.instanceColor = new InstancedBufferAttribute(new Float32Array(instanceColor.array), instanceColor.itemSize);
					break;

				case 'LOD':
					object = new LOD();
					break;

				case 'Line':
					object = new Line(getGeometry(data.geometry), getMaterial(data.material));
					break;

				case 'LineLoop':
					object = new LineLoop(getGeometry(data.geometry), getMaterial(data.material));
					break;

				case 'LineSegments':
					object = new LineSegments(getGeometry(data.geometry), getMaterial(data.material));
					break;

				case 'PointCloud':
				case 'Points':
					object = new Points(getGeometry(data.geometry), getMaterial(data.material));
					break;

				case 'Sprite':
					object = new Sprite(getMaterial(data.material));
					break;

				case 'Group':
					object = new Group();
					break;

				case 'Bone':
					object = new Bone();
					break;

				default:
					object = new Object3D();
			}

			object.uuid = data.uuid;
			if (data.name !== undefined) object.name = data.name;

			if (data.matrix !== undefined) {
				object.matrix.fromArray(data.matrix);
				if (data.matrixAutoUpdate !== undefined) object.matrixAutoUpdate = data.matrixAutoUpdate;
				if (object.matrixAutoUpdate) object.matrix.decompose(object.position, object.quaternion, object.scale);
			} else {
				if (data.position !== undefined) object.position.fromArray(data.position);
				if (data.rotation !== undefined) object.rotation.fromArray(data.rotation);
				if (data.quaternion !== undefined) object.quaternion.fromArray(data.quaternion);
				if (data.scale !== undefined) object.scale.fromArray(data.scale);
			}

			if (data.castShadow !== undefined) object.castShadow = data.castShadow;
			if (data.receiveShadow !== undefined) object.receiveShadow = data.receiveShadow;

			if (data.shadow) {
				if (data.shadow.bias !== undefined) object.shadow.bias = data.shadow.bias;
				if (data.shadow.normalBias !== undefined) object.shadow.normalBias = data.shadow.normalBias;
				if (data.shadow.radius !== undefined) object.shadow.radius = data.shadow.radius;
				if (data.shadow.mapSize !== undefined) object.shadow.mapSize.fromArray(data.shadow.mapSize);
				if (data.shadow.camera !== undefined) object.shadow.camera = this.parseObject(data.shadow.camera);
			}

			if (data.visible !== undefined) object.visible = data.visible;
			if (data.frustumCulled !== undefined) object.frustumCulled = data.frustumCulled;
			if (data.renderOrder !== undefined) object.renderOrder = data.renderOrder;
			if (data.userData !== undefined) object.userData = data.userData;
			if (data.layers !== undefined) object.layers.mask = data.layers;

			if (data.children !== undefined) {
				const children = data.children;

				for (let i = 0; i < children.length; i++) {
					object.add(this.parseObject(children[i], geometries, materials, textures, animations));
				}
			}

			if (data.animations !== undefined) {
				const objectAnimations = data.animations;

				for (let i = 0; i < objectAnimations.length; i++) {
					const uuid = objectAnimations[i];
					object.animations.push(animations[uuid]);
				}
			}

			if (data.type === 'LOD') {
				if (data.autoUpdate !== undefined) object.autoUpdate = data.autoUpdate;
				const levels = data.levels;

				for (let l = 0; l < levels.length; l++) {
					const level = levels[l];
					const child = object.getObjectByProperty('uuid', level.object);

					if (child !== undefined) {
						object.addLevel(child, level.distance);
					}
				}
			}

			return object;
		}

		bindSkeletons(object, skeletons) {
			if (Object.keys(skeletons).length === 0) return;
			object.traverse(function (child) {
				if (child.isSkinnedMesh === true && child.skeleton !== undefined) {
					const skeleton = skeletons[child.skeleton];

					if (skeleton === undefined) {
						console.warn('THREE.ObjectLoader: No skeleton found with UUID:', child.skeleton);
					} else {
						child.bind(skeleton, child.bindMatrix);
					}
				}
			});
		}

	}

	const TEXTURE_MAPPING = {
		UVMapping: UVMapping,
		CubeReflectionMapping: CubeReflectionMapping,
		CubeRefractionMapping: CubeRefractionMapping,
		EquirectangularReflectionMapping: EquirectangularReflectionMapping,
		EquirectangularRefractionMapping: EquirectangularRefractionMapping,
		CubeUVReflectionMapping: CubeUVReflectionMapping
	};
	const TEXTURE_WRAPPING = {
		RepeatWrapping: RepeatWrapping,
		ClampToEdgeWrapping: ClampToEdgeWrapping,
		MirroredRepeatWrapping: MirroredRepeatWrapping
	};
	const TEXTURE_FILTER = {
		NearestFilter: NearestFilter,
		NearestMipmapNearestFilter: NearestMipmapNearestFilter,
		NearestMipmapLinearFilter: NearestMipmapLinearFilter,
		LinearFilter: LinearFilter,
		LinearMipmapNearestFilter: LinearMipmapNearestFilter,
		LinearMipmapLinearFilter: LinearMipmapLinearFilter
	};

	class ImageBitmapLoader extends Loader {
		constructor(manager) {
			super(manager);
			this.isImageBitmapLoader = true;

			if (typeof createImageBitmap === 'undefined') {
				console.warn('THREE.ImageBitmapLoader: createImageBitmap() not supported.');
			}

			if (typeof fetch === 'undefined') {
				console.warn('THREE.ImageBitmapLoader: fetch() not supported.');
			}

			this.options = {
				premultiplyAlpha: 'none'
			};
		}

		setOptions(options) {
			this.options = options;
			return this;
		}

		load(url, onLoad, onProgress, onError) {
			if (url === undefined) url = '';
			if (this.path !== undefined) url = this.path + url;
			url = this.manager.resolveURL(url);
			const scope = this;
			const cached = Cache.get(url);

			if (cached !== undefined) {
				scope.manager.itemStart(url);
				setTimeout(function () {
					if (onLoad) onLoad(cached);
					scope.manager.itemEnd(url);
				}, 0);
				return cached;
			}

			const fetchOptions = {};
			fetchOptions.credentials = this.crossOrigin === 'anonymous' ? 'same-origin' : 'include';
			fetchOptions.headers = this.requestHeader;
			fetch(url, fetchOptions).then(function (res) {
				return res.blob();
			}).then(function (blob) {
				return createImageBitmap(blob, Object.assign(scope.options, {
					colorSpaceConversion: 'none'
				}));
			}).then(function (imageBitmap) {
				Cache.add(url, imageBitmap);
				if (onLoad) onLoad(imageBitmap);
				scope.manager.itemEnd(url);
			}).catch(function (e) {
				if (onError) onError(e);
				scope.manager.itemError(url);
				scope.manager.itemEnd(url);
			});
			scope.manager.itemStart(url);
		}

	}

	let _context;

	const AudioContext = {
		getContext: function () {
			if (_context === undefined) {
				_context = new (window.AudioContext || window.webkitAudioContext)();
			}

			return _context;
		},
		setContext: function (value) {
			_context = value;
		}
	};

	class AudioLoader extends Loader {
		constructor(manager) {
			super(manager);
		}

		load(url, onLoad, onProgress, onError) {
			const scope = this;
			const loader = new FileLoader(this.manager);
			loader.setResponseType('arraybuffer');
			loader.setPath(this.path);
			loader.setRequestHeader(this.requestHeader);
			loader.setWithCredentials(this.withCredentials);
			loader.load(url, function (buffer) {
				try {
					// Create a copy of the buffer. The `decodeAudioData` method
					// detaches the buffer when complete, preventing reuse.
					const bufferCopy = buffer.slice(0);
					const context = AudioContext.getContext();
					context.decodeAudioData(bufferCopy, function (audioBuffer) {
						onLoad(audioBuffer);
					});
				} catch (e) {
					if (onError) {
						onError(e);
					} else {
						console.error(e);
					}

					scope.manager.itemError(url);
				}
			}, onProgress, onError);
		}

	}

	class HemisphereLightProbe extends LightProbe {
		constructor(skyColor, groundColor, intensity = 1) {
			super(undefined, intensity);
			this.isHemisphereLightProbe = true;
			const color1 = new Color().set(skyColor);
			const color2 = new Color().set(groundColor);
			const sky = new Vector3(color1.r, color1.g, color1.b);
			const ground = new Vector3(color2.r, color2.g, color2.b); // without extra factor of PI in the shader, should = 1 / Math.sqrt( Math.PI );

			const c0 = Math.sqrt(Math.PI);
			const c1 = c0 * Math.sqrt(0.75);
			this.sh.coefficients[0].copy(sky).add(ground).multiplyScalar(c0);
			this.sh.coefficients[1].copy(sky).sub(ground).multiplyScalar(c1);
		}

	}

	class AmbientLightProbe extends LightProbe {
		constructor(color, intensity = 1) {
			super(undefined, intensity);
			this.isAmbientLightProbe = true;
			const color1 = new Color().set(color); // without extra factor of PI in the shader, would be 2 / Math.sqrt( Math.PI );

			this.sh.coefficients[0].set(color1.r, color1.g, color1.b).multiplyScalar(2 * Math.sqrt(Math.PI));
		}

	}

	const _eyeRight = /*@__PURE__*/new Matrix4();

	const _eyeLeft = /*@__PURE__*/new Matrix4();

	const _projectionMatrix = /*@__PURE__*/new Matrix4();

	class StereoCamera {
		constructor() {
			this.type = 'StereoCamera';
			this.aspect = 1;
			this.eyeSep = 0.064;
			this.cameraL = new PerspectiveCamera();
			this.cameraL.layers.enable(1);
			this.cameraL.matrixAutoUpdate = false;
			this.cameraR = new PerspectiveCamera();
			this.cameraR.layers.enable(2);
			this.cameraR.matrixAutoUpdate = false;
			this._cache = {
				focus: null,
				fov: null,
				aspect: null,
				near: null,
				far: null,
				zoom: null,
				eyeSep: null
			};
		}

		update(camera) {
			const cache = this._cache;
			const needsUpdate = cache.focus !== camera.focus || cache.fov !== camera.fov || cache.aspect !== camera.aspect * this.aspect || cache.near !== camera.near || cache.far !== camera.far || cache.zoom !== camera.zoom || cache.eyeSep !== this.eyeSep;

			if (needsUpdate) {
				cache.focus = camera.focus;
				cache.fov = camera.fov;
				cache.aspect = camera.aspect * this.aspect;
				cache.near = camera.near;
				cache.far = camera.far;
				cache.zoom = camera.zoom;
				cache.eyeSep = this.eyeSep; // Off-axis stereoscopic effect based on
				// http://paulbourke.net/stereographics/stereorender/

				_projectionMatrix.copy(camera.projectionMatrix);

				const eyeSepHalf = cache.eyeSep / 2;
				const eyeSepOnProjection = eyeSepHalf * cache.near / cache.focus;
				const ymax = cache.near * Math.tan(DEG2RAD * cache.fov * 0.5) / cache.zoom;
				let xmin, xmax; // translate xOffset

				_eyeLeft.elements[12] = -eyeSepHalf;
				_eyeRight.elements[12] = eyeSepHalf; // for left eye

				xmin = -ymax * cache.aspect + eyeSepOnProjection;
				xmax = ymax * cache.aspect + eyeSepOnProjection;
				_projectionMatrix.elements[0] = 2 * cache.near / (xmax - xmin);
				_projectionMatrix.elements[8] = (xmax + xmin) / (xmax - xmin);
				this.cameraL.projectionMatrix.copy(_projectionMatrix); // for right eye

				xmin = -ymax * cache.aspect - eyeSepOnProjection;
				xmax = ymax * cache.aspect - eyeSepOnProjection;
				_projectionMatrix.elements[0] = 2 * cache.near / (xmax - xmin);
				_projectionMatrix.elements[8] = (xmax + xmin) / (xmax - xmin);
				this.cameraR.projectionMatrix.copy(_projectionMatrix);
			}

			this.cameraL.matrixWorld.copy(camera.matrixWorld).multiply(_eyeLeft);
			this.cameraR.matrixWorld.copy(camera.matrixWorld).multiply(_eyeRight);
		}

	}

	class Clock {
		constructor(autoStart = true) {
			this.autoStart = autoStart;
			this.startTime = 0;
			this.oldTime = 0;
			this.elapsedTime = 0;
			this.running = false;
		}

		start() {
			this.startTime = now();
			this.oldTime = this.startTime;
			this.elapsedTime = 0;
			this.running = true;
		}

		stop() {
			this.getElapsedTime();
			this.running = false;
			this.autoStart = false;
		}

		getElapsedTime() {
			this.getDelta();
			return this.elapsedTime;
		}

		getDelta() {
			let diff = 0;

			if (this.autoStart && !this.running) {
				this.start();
				return 0;
			}

			if (this.running) {
				const newTime = now();
				diff = (newTime - this.oldTime) / 1000;
				this.oldTime = newTime;
				this.elapsedTime += diff;
			}

			return diff;
		}

	}

	function now() {
		return (typeof performance === 'undefined' ? Date : performance).now(); // see #10732
	}

	const _position$1 = /*@__PURE__*/new Vector3();

	const _quaternion$1 = /*@__PURE__*/new Quaternion();

	const _scale$1 = /*@__PURE__*/new Vector3();

	const _orientation$1 = /*@__PURE__*/new Vector3();

	class AudioListener extends Object3D {
		constructor() {
			super();
			this.type = 'AudioListener';
			this.context = AudioContext.getContext();
			this.gain = this.context.createGain();
			this.gain.connect(this.context.destination);
			this.filter = null;
			this.timeDelta = 0; // private

			this._clock = new Clock();
		}

		getInput() {
			return this.gain;
		}

		removeFilter() {
			if (this.filter !== null) {
				this.gain.disconnect(this.filter);
				this.filter.disconnect(this.context.destination);
				this.gain.connect(this.context.destination);
				this.filter = null;
			}

			return this;
		}

		getFilter() {
			return this.filter;
		}

		setFilter(value) {
			if (this.filter !== null) {
				this.gain.disconnect(this.filter);
				this.filter.disconnect(this.context.destination);
			} else {
				this.gain.disconnect(this.context.destination);
			}

			this.filter = value;
			this.gain.connect(this.filter);
			this.filter.connect(this.context.destination);
			return this;
		}

		getMasterVolume() {
			return this.gain.gain.value;
		}

		setMasterVolume(value) {
			this.gain.gain.setTargetAtTime(value, this.context.currentTime, 0.01);
			return this;
		}

		updateMatrixWorld(force) {
			super.updateMatrixWorld(force);
			const listener = this.context.listener;
			const up = this.up;
			this.timeDelta = this._clock.getDelta();
			this.matrixWorld.decompose(_position$1, _quaternion$1, _scale$1);

			_orientation$1.set(0, 0, -1).applyQuaternion(_quaternion$1);

			if (listener.positionX) {
				// code path for Chrome (see #14393)
				const endTime = this.context.currentTime + this.timeDelta;
				listener.positionX.linearRampToValueAtTime(_position$1.x, endTime);
				listener.positionY.linearRampToValueAtTime(_position$1.y, endTime);
				listener.positionZ.linearRampToValueAtTime(_position$1.z, endTime);
				listener.forwardX.linearRampToValueAtTime(_orientation$1.x, endTime);
				listener.forwardY.linearRampToValueAtTime(_orientation$1.y, endTime);
				listener.forwardZ.linearRampToValueAtTime(_orientation$1.z, endTime);
				listener.upX.linearRampToValueAtTime(up.x, endTime);
				listener.upY.linearRampToValueAtTime(up.y, endTime);
				listener.upZ.linearRampToValueAtTime(up.z, endTime);
			} else {
				listener.setPosition(_position$1.x, _position$1.y, _position$1.z);
				listener.setOrientation(_orientation$1.x, _orientation$1.y, _orientation$1.z, up.x, up.y, up.z);
			}
		}

	}

	class Audio extends Object3D {
		constructor(listener) {
			super();
			this.type = 'Audio';
			this.listener = listener;
			this.context = listener.context;
			this.gain = this.context.createGain();
			this.gain.connect(listener.getInput());
			this.autoplay = false;
			this.buffer = null;
			this.detune = 0;
			this.loop = false;
			this.loopStart = 0;
			this.loopEnd = 0;
			this.offset = 0;
			this.duration = undefined;
			this.playbackRate = 1;
			this.isPlaying = false;
			this.hasPlaybackControl = true;
			this.source = null;
			this.sourceType = 'empty';
			this._startedAt = 0;
			this._progress = 0;
			this._connected = false;
			this.filters = [];
		}

		getOutput() {
			return this.gain;
		}

		setNodeSource(audioNode) {
			this.hasPlaybackControl = false;
			this.sourceType = 'audioNode';
			this.source = audioNode;
			this.connect();
			return this;
		}

		setMediaElementSource(mediaElement) {
			this.hasPlaybackControl = false;
			this.sourceType = 'mediaNode';
			this.source = this.context.createMediaElementSource(mediaElement);
			this.connect();
			return this;
		}

		setMediaStreamSource(mediaStream) {
			this.hasPlaybackControl = false;
			this.sourceType = 'mediaStreamNode';
			this.source = this.context.createMediaStreamSource(mediaStream);
			this.connect();
			return this;
		}

		setBuffer(audioBuffer) {
			this.buffer = audioBuffer;
			this.sourceType = 'buffer';
			if (this.autoplay) this.play();
			return this;
		}

		play(delay = 0) {
			if (this.isPlaying === true) {
				console.warn('THREE.Audio: Audio is already playing.');
				return;
			}

			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return;
			}

			this._startedAt = this.context.currentTime + delay;
			const source = this.context.createBufferSource();
			source.buffer = this.buffer;
			source.loop = this.loop;
			source.loopStart = this.loopStart;
			source.loopEnd = this.loopEnd;
			source.onended = this.onEnded.bind(this);
			source.start(this._startedAt, this._progress + this.offset, this.duration);
			this.isPlaying = true;
			this.source = source;
			this.setDetune(this.detune);
			this.setPlaybackRate(this.playbackRate);
			return this.connect();
		}

		pause() {
			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return;
			}

			if (this.isPlaying === true) {
				// update current progress
				this._progress += Math.max(this.context.currentTime - this._startedAt, 0) * this.playbackRate;

				if (this.loop === true) {
					// ensure _progress does not exceed duration with looped audios
					this._progress = this._progress % (this.duration || this.buffer.duration);
				}

				this.source.stop();
				this.source.onended = null;
				this.isPlaying = false;
			}

			return this;
		}

		stop() {
			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return;
			}

			this._progress = 0;
			this.source.stop();
			this.source.onended = null;
			this.isPlaying = false;
			return this;
		}

		connect() {
			if (this.filters.length > 0) {
				this.source.connect(this.filters[0]);

				for (let i = 1, l = this.filters.length; i < l; i++) {
					this.filters[i - 1].connect(this.filters[i]);
				}

				this.filters[this.filters.length - 1].connect(this.getOutput());
			} else {
				this.source.connect(this.getOutput());
			}

			this._connected = true;
			return this;
		}

		disconnect() {
			if (this.filters.length > 0) {
				this.source.disconnect(this.filters[0]);

				for (let i = 1, l = this.filters.length; i < l; i++) {
					this.filters[i - 1].disconnect(this.filters[i]);
				}

				this.filters[this.filters.length - 1].disconnect(this.getOutput());
			} else {
				this.source.disconnect(this.getOutput());
			}

			this._connected = false;
			return this;
		}

		getFilters() {
			return this.filters;
		}

		setFilters(value) {
			if (!value) value = [];

			if (this._connected === true) {
				this.disconnect();
				this.filters = value.slice();
				this.connect();
			} else {
				this.filters = value.slice();
			}

			return this;
		}

		setDetune(value) {
			this.detune = value;
			if (this.source.detune === undefined) return; // only set detune when available

			if (this.isPlaying === true) {
				this.source.detune.setTargetAtTime(this.detune, this.context.currentTime, 0.01);
			}

			return this;
		}

		getDetune() {
			return this.detune;
		}

		getFilter() {
			return this.getFilters()[0];
		}

		setFilter(filter) {
			return this.setFilters(filter ? [filter] : []);
		}

		setPlaybackRate(value) {
			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return;
			}

			this.playbackRate = value;

			if (this.isPlaying === true) {
				this.source.playbackRate.setTargetAtTime(this.playbackRate, this.context.currentTime, 0.01);
			}

			return this;
		}

		getPlaybackRate() {
			return this.playbackRate;
		}

		onEnded() {
			this.isPlaying = false;
		}

		getLoop() {
			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return false;
			}

			return this.loop;
		}

		setLoop(value) {
			if (this.hasPlaybackControl === false) {
				console.warn('THREE.Audio: this Audio has no playback control.');
				return;
			}

			this.loop = value;

			if (this.isPlaying === true) {
				this.source.loop = this.loop;
			}

			return this;
		}

		setLoopStart(value) {
			this.loopStart = value;
			return this;
		}

		setLoopEnd(value) {
			this.loopEnd = value;
			return this;
		}

		getVolume() {
			return this.gain.gain.value;
		}

		setVolume(value) {
			this.gain.gain.setTargetAtTime(value, this.context.currentTime, 0.01);
			return this;
		}

	}

	const _position = /*@__PURE__*/new Vector3();

	const _quaternion = /*@__PURE__*/new Quaternion();

	const _scale = /*@__PURE__*/new Vector3();

	const _orientation = /*@__PURE__*/new Vector3();

	class PositionalAudio extends Audio {
		constructor(listener) {
			super(listener);
			this.panner = this.context.createPanner();
			this.panner.panningModel = 'HRTF';
			this.panner.connect(this.gain);
		}

		disconnect() {
			super.disconnect();
			this.panner.disconnect(this.gain);
		}

		getOutput() {
			return this.panner;
		}

		getRefDistance() {
			return this.panner.refDistance;
		}

		setRefDistance(value) {
			this.panner.refDistance = value;
			return this;
		}

		getRolloffFactor() {
			return this.panner.rolloffFactor;
		}

		setRolloffFactor(value) {
			this.panner.rolloffFactor = value;
			return this;
		}

		getDistanceModel() {
			return this.panner.distanceModel;
		}

		setDistanceModel(value) {
			this.panner.distanceModel = value;
			return this;
		}

		getMaxDistance() {
			return this.panner.maxDistance;
		}

		setMaxDistance(value) {
			this.panner.maxDistance = value;
			return this;
		}

		setDirectionalCone(coneInnerAngle, coneOuterAngle, coneOuterGain) {
			this.panner.coneInnerAngle = coneInnerAngle;
			this.panner.coneOuterAngle = coneOuterAngle;
			this.panner.coneOuterGain = coneOuterGain;
			return this;
		}

		updateMatrixWorld(force) {
			super.updateMatrixWorld(force);
			if (this.hasPlaybackControl === true && this.isPlaying === false) return;
			this.matrixWorld.decompose(_position, _quaternion, _scale);

			_orientation.set(0, 0, 1).applyQuaternion(_quaternion);

			const panner = this.panner;

			if (panner.positionX) {
				// code path for Chrome and Firefox (see #14393)
				const endTime = this.context.currentTime + this.listener.timeDelta;
				panner.positionX.linearRampToValueAtTime(_position.x, endTime);
				panner.positionY.linearRampToValueAtTime(_position.y, endTime);
				panner.positionZ.linearRampToValueAtTime(_position.z, endTime);
				panner.orientationX.linearRampToValueAtTime(_orientation.x, endTime);
				panner.orientationY.linearRampToValueAtTime(_orientation.y, endTime);
				panner.orientationZ.linearRampToValueAtTime(_orientation.z, endTime);
			} else {
				panner.setPosition(_position.x, _position.y, _position.z);
				panner.setOrientation(_orientation.x, _orientation.y, _orientation.z);
			}
		}

	}

	class AudioAnalyser {
		constructor(audio, fftSize = 2048) {
			this.analyser = audio.context.createAnalyser();
			this.analyser.fftSize = fftSize;
			this.data = new Uint8Array(this.analyser.frequencyBinCount);
			audio.getOutput().connect(this.analyser);
		}

		getFrequencyData() {
			this.analyser.getByteFrequencyData(this.data);
			return this.data;
		}

		getAverageFrequency() {
			let value = 0;
			const data = this.getFrequencyData();

			for (let i = 0; i < data.length; i++) {
				value += data[i];
			}

			return value / data.length;
		}

	}

	class PropertyMixer {
		constructor(binding, typeName, valueSize) {
			this.binding = binding;
			this.valueSize = valueSize;
			let mixFunction, mixFunctionAdditive, setIdentity; // buffer layout: [ incoming | accu0 | accu1 | orig | addAccu | (optional work) ]
			//
			// interpolators can use .buffer as their .result
			// the data then goes to 'incoming'
			//
			// 'accu0' and 'accu1' are used frame-interleaved for
			// the cumulative result and are compared to detect
			// changes
			//
			// 'orig' stores the original state of the property
			//
			// 'add' is used for additive cumulative results
			//
			// 'work' is optional and is only present for quaternion types. It is used
			// to store intermediate quaternion multiplication results

			switch (typeName) {
				case 'quaternion':
					mixFunction = this._slerp;
					mixFunctionAdditive = this._slerpAdditive;
					setIdentity = this._setAdditiveIdentityQuaternion;
					this.buffer = new Float64Array(valueSize * 6);
					this._workIndex = 5;
					break;

				case 'string':
				case 'bool':
					mixFunction = this._select; // Use the regular mix function and for additive on these types,
					// additive is not relevant for non-numeric types

					mixFunctionAdditive = this._select;
					setIdentity = this._setAdditiveIdentityOther;
					this.buffer = new Array(valueSize * 5);
					break;

				default:
					mixFunction = this._lerp;
					mixFunctionAdditive = this._lerpAdditive;
					setIdentity = this._setAdditiveIdentityNumeric;
					this.buffer = new Float64Array(valueSize * 5);
			}

			this._mixBufferRegion = mixFunction;
			this._mixBufferRegionAdditive = mixFunctionAdditive;
			this._setIdentity = setIdentity;
			this._origIndex = 3;
			this._addIndex = 4;
			this.cumulativeWeight = 0;
			this.cumulativeWeightAdditive = 0;
			this.useCount = 0;
			this.referenceCount = 0;
		} // accumulate data in the 'incoming' region into 'accu<i>'


		accumulate(accuIndex, weight) {
			// note: happily accumulating nothing when weight = 0, the caller knows
			// the weight and shouldn't have made the call in the first place
			const buffer = this.buffer,
						stride = this.valueSize,
						offset = accuIndex * stride + stride;
			let currentWeight = this.cumulativeWeight;

			if (currentWeight === 0) {
				// accuN := incoming * weight
				for (let i = 0; i !== stride; ++i) {
					buffer[offset + i] = buffer[i];
				}

				currentWeight = weight;
			} else {
				// accuN := accuN + incoming * weight
				currentWeight += weight;
				const mix = weight / currentWeight;

				this._mixBufferRegion(buffer, offset, 0, mix, stride);
			}

			this.cumulativeWeight = currentWeight;
		} // accumulate data in the 'incoming' region into 'add'


		accumulateAdditive(weight) {
			const buffer = this.buffer,
						stride = this.valueSize,
						offset = stride * this._addIndex;

			if (this.cumulativeWeightAdditive === 0) {
				// add = identity
				this._setIdentity();
			} // add := add + incoming * weight


			this._mixBufferRegionAdditive(buffer, offset, 0, weight, stride);

			this.cumulativeWeightAdditive += weight;
		} // apply the state of 'accu<i>' to the binding when accus differ


		apply(accuIndex) {
			const stride = this.valueSize,
						buffer = this.buffer,
						offset = accuIndex * stride + stride,
						weight = this.cumulativeWeight,
						weightAdditive = this.cumulativeWeightAdditive,
						binding = this.binding;
			this.cumulativeWeight = 0;
			this.cumulativeWeightAdditive = 0;

			if (weight < 1) {
				// accuN := accuN + original * ( 1 - cumulativeWeight )
				const originalValueOffset = stride * this._origIndex;

				this._mixBufferRegion(buffer, offset, originalValueOffset, 1 - weight, stride);
			}

			if (weightAdditive > 0) {
				// accuN := accuN + additive accuN
				this._mixBufferRegionAdditive(buffer, offset, this._addIndex * stride, 1, stride);
			}

			for (let i = stride, e = stride + stride; i !== e; ++i) {
				if (buffer[i] !== buffer[i + stride]) {
					// value has changed -> update scene graph
					binding.setValue(buffer, offset);
					break;
				}
			}
		} // remember the state of the bound property and copy it to both accus


		saveOriginalState() {
			const binding = this.binding;
			const buffer = this.buffer,
						stride = this.valueSize,
						originalValueOffset = stride * this._origIndex;
			binding.getValue(buffer, originalValueOffset); // accu[0..1] := orig -- initially detect changes against the original

			for (let i = stride, e = originalValueOffset; i !== e; ++i) {
				buffer[i] = buffer[originalValueOffset + i % stride];
			} // Add to identity for additive


			this._setIdentity();

			this.cumulativeWeight = 0;
			this.cumulativeWeightAdditive = 0;
		} // apply the state previously taken via 'saveOriginalState' to the binding


		restoreOriginalState() {
			const originalValueOffset = this.valueSize * 3;
			this.binding.setValue(this.buffer, originalValueOffset);
		}

		_setAdditiveIdentityNumeric() {
			const startIndex = this._addIndex * this.valueSize;
			const endIndex = startIndex + this.valueSize;

			for (let i = startIndex; i < endIndex; i++) {
				this.buffer[i] = 0;
			}
		}

		_setAdditiveIdentityQuaternion() {
			this._setAdditiveIdentityNumeric();

			this.buffer[this._addIndex * this.valueSize + 3] = 1;
		}

		_setAdditiveIdentityOther() {
			const startIndex = this._origIndex * this.valueSize;
			const targetIndex = this._addIndex * this.valueSize;

			for (let i = 0; i < this.valueSize; i++) {
				this.buffer[targetIndex + i] = this.buffer[startIndex + i];
			}
		} // mix functions


		_select(buffer, dstOffset, srcOffset, t, stride) {
			if (t >= 0.5) {
				for (let i = 0; i !== stride; ++i) {
					buffer[dstOffset + i] = buffer[srcOffset + i];
				}
			}
		}

		_slerp(buffer, dstOffset, srcOffset, t) {
			Quaternion.slerpFlat(buffer, dstOffset, buffer, dstOffset, buffer, srcOffset, t);
		}

		_slerpAdditive(buffer, dstOffset, srcOffset, t, stride) {
			const workOffset = this._workIndex * stride; // Store result in intermediate buffer offset

			Quaternion.multiplyQuaternionsFlat(buffer, workOffset, buffer, dstOffset, buffer, srcOffset); // Slerp to the intermediate result

			Quaternion.slerpFlat(buffer, dstOffset, buffer, dstOffset, buffer, workOffset, t);
		}

		_lerp(buffer, dstOffset, srcOffset, t, stride) {
			const s = 1 - t;

			for (let i = 0; i !== stride; ++i) {
				const j = dstOffset + i;
				buffer[j] = buffer[j] * s + buffer[srcOffset + i] * t;
			}
		}

		_lerpAdditive(buffer, dstOffset, srcOffset, t, stride) {
			for (let i = 0; i !== stride; ++i) {
				const j = dstOffset + i;
				buffer[j] = buffer[j] + buffer[srcOffset + i] * t;
			}
		}

	}

	// Characters [].:/ are reserved for track binding syntax.
	const _RESERVED_CHARS_RE = '\\[\\]\\.:\\/';

	const _reservedRe = new RegExp('[' + _RESERVED_CHARS_RE + ']', 'g'); // Attempts to allow node names from any language. ES5's `\w` regexp matches
	// only latin characters, and the unicode \p{L} is not yet supported. So
	// instead, we exclude reserved characters and match everything else.


	const _wordChar = '[^' + _RESERVED_CHARS_RE + ']';

	const _wordCharOrDot = '[^' + _RESERVED_CHARS_RE.replace('\\.', '') + ']'; // Parent directories, delimited by '/' or ':'. Currently unused, but must
	// be matched to parse the rest of the track name.


	const _directoryRe = /*@__PURE__*/ /((?:WC+[\/:])*)/.source.replace('WC', _wordChar); // Target node. May contain word characters (a-zA-Z0-9_) and '.' or '-'.


	const _nodeRe = /*@__PURE__*/ /(WCOD+)?/.source.replace('WCOD', _wordCharOrDot); // Object on target node, and accessor. May not contain reserved
	// characters. Accessor may contain any character except closing bracket.


	const _objectRe = /*@__PURE__*/ /(?:\.(WC+)(?:\[(.+)\])?)?/.source.replace('WC', _wordChar); // Property and accessor. May not contain reserved characters. Accessor may
	// contain any non-bracket characters.


	const _propertyRe = /*@__PURE__*/ /\.(WC+)(?:\[(.+)\])?/.source.replace('WC', _wordChar);

	const _trackRe = new RegExp('' + '^' + _directoryRe + _nodeRe + _objectRe + _propertyRe + '$');

	const _supportedObjectNames = ['material', 'materials', 'bones'];

	class Composite {
		constructor(targetGroup, path, optionalParsedPath) {
			const parsedPath = optionalParsedPath || PropertyBinding.parseTrackName(path);
			this._targetGroup = targetGroup;
			this._bindings = targetGroup.subscribe_(path, parsedPath);
		}

		getValue(array, offset) {
			this.bind(); // bind all binding

			const firstValidIndex = this._targetGroup.nCachedObjects_,
						binding = this._bindings[firstValidIndex]; // and only call .getValue on the first

			if (binding !== undefined) binding.getValue(array, offset);
		}

		setValue(array, offset) {
			const bindings = this._bindings;

			for (let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
				bindings[i].setValue(array, offset);
			}
		}

		bind() {
			const bindings = this._bindings;

			for (let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
				bindings[i].bind();
			}
		}

		unbind() {
			const bindings = this._bindings;

			for (let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
				bindings[i].unbind();
			}
		}

	} // Note: This class uses a State pattern on a per-method basis:
	// 'bind' sets 'this.getValue' / 'setValue' and shadows the
	// prototype version of these methods with one that represents
	// the bound state. When the property is not found, the methods
	// become no-ops.


	class PropertyBinding {
		constructor(rootNode, path, parsedPath) {
			this.path = path;
			this.parsedPath = parsedPath || PropertyBinding.parseTrackName(path);
			this.node = PropertyBinding.findNode(rootNode, this.parsedPath.nodeName) || rootNode;
			this.rootNode = rootNode; // initial state of these methods that calls 'bind'

			this.getValue = this._getValue_unbound;
			this.setValue = this._setValue_unbound;
		}

		static create(root, path, parsedPath) {
			if (!(root && root.isAnimationObjectGroup)) {
				return new PropertyBinding(root, path, parsedPath);
			} else {
				return new PropertyBinding.Composite(root, path, parsedPath);
			}
		}
		/**
		 * Replaces spaces with underscores and removes unsupported characters from
		 * node names, to ensure compatibility with parseTrackName().
		 *
		 * @param {string} name Node name to be sanitized.
		 * @return {string}
		 */


		static sanitizeNodeName(name) {
			return name.replace(/\s/g, '_').replace(_reservedRe, '');
		}

		static parseTrackName(trackName) {
			const matches = _trackRe.exec(trackName);

			if (matches === null) {
				throw new Error('PropertyBinding: Cannot parse trackName: ' + trackName);
			}

			const results = {
				// directoryName: matches[ 1 ], // (tschw) currently unused
				nodeName: matches[2],
				objectName: matches[3],
				objectIndex: matches[4],
				propertyName: matches[5],
				// required
				propertyIndex: matches[6]
			};
			const lastDot = results.nodeName && results.nodeName.lastIndexOf('.');

			if (lastDot !== undefined && lastDot !== -1) {
				const objectName = results.nodeName.substring(lastDot + 1); // Object names must be checked against an allowlist. Otherwise, there
				// is no way to parse 'foo.bar.baz': 'baz' must be a property, but
				// 'bar' could be the objectName, or part of a nodeName (which can
				// include '.' characters).

				if (_supportedObjectNames.indexOf(objectName) !== -1) {
					results.nodeName = results.nodeName.substring(0, lastDot);
					results.objectName = objectName;
				}
			}

			if (results.propertyName === null || results.propertyName.length === 0) {
				throw new Error('PropertyBinding: can not parse propertyName from trackName: ' + trackName);
			}

			return results;
		}

		static findNode(root, nodeName) {
			if (nodeName === undefined || nodeName === '' || nodeName === '.' || nodeName === -1 || nodeName === root.name || nodeName === root.uuid) {
				return root;
			} // search into skeleton bones.


			if (root.skeleton) {
				const bone = root.skeleton.getBoneByName(nodeName);

				if (bone !== undefined) {
					return bone;
				}
			} // search into node subtree.


			if (root.children) {
				const searchNodeSubtree = function (children) {
					for (let i = 0; i < children.length; i++) {
						const childNode = children[i];

						if (childNode.name === nodeName || childNode.uuid === nodeName) {
							return childNode;
						}

						const result = searchNodeSubtree(childNode.children);
						if (result) return result;
					}

					return null;
				};

				const subTreeNode = searchNodeSubtree(root.children);

				if (subTreeNode) {
					return subTreeNode;
				}
			}

			return null;
		} // these are used to "bind" a nonexistent property


		_getValue_unavailable() {}

		_setValue_unavailable() {} // Getters


		_getValue_direct(buffer, offset) {
			buffer[offset] = this.targetObject[this.propertyName];
		}

		_getValue_array(buffer, offset) {
			const source = this.resolvedProperty;

			for (let i = 0, n = source.length; i !== n; ++i) {
				buffer[offset++] = source[i];
			}
		}

		_getValue_arrayElement(buffer, offset) {
			buffer[offset] = this.resolvedProperty[this.propertyIndex];
		}

		_getValue_toArray(buffer, offset) {
			this.resolvedProperty.toArray(buffer, offset);
		} // Direct


		_setValue_direct(buffer, offset) {
			this.targetObject[this.propertyName] = buffer[offset];
		}

		_setValue_direct_setNeedsUpdate(buffer, offset) {
			this.targetObject[this.propertyName] = buffer[offset];
			this.targetObject.needsUpdate = true;
		}

		_setValue_direct_setMatrixWorldNeedsUpdate(buffer, offset) {
			this.targetObject[this.propertyName] = buffer[offset];
			this.targetObject.matrixWorldNeedsUpdate = true;
		} // EntireArray


		_setValue_array(buffer, offset) {
			const dest = this.resolvedProperty;

			for (let i = 0, n = dest.length; i !== n; ++i) {
				dest[i] = buffer[offset++];
			}
		}

		_setValue_array_setNeedsUpdate(buffer, offset) {
			const dest = this.resolvedProperty;

			for (let i = 0, n = dest.length; i !== n; ++i) {
				dest[i] = buffer[offset++];
			}

			this.targetObject.needsUpdate = true;
		}

		_setValue_array_setMatrixWorldNeedsUpdate(buffer, offset) {
			const dest = this.resolvedProperty;

			for (let i = 0, n = dest.length; i !== n; ++i) {
				dest[i] = buffer[offset++];
			}

			this.targetObject.matrixWorldNeedsUpdate = true;
		} // ArrayElement


		_setValue_arrayElement(buffer, offset) {
			this.resolvedProperty[this.propertyIndex] = buffer[offset];
		}

		_setValue_arrayElement_setNeedsUpdate(buffer, offset) {
			this.resolvedProperty[this.propertyIndex] = buffer[offset];
			this.targetObject.needsUpdate = true;
		}

		_setValue_arrayElement_setMatrixWorldNeedsUpdate(buffer, offset) {
			this.resolvedProperty[this.propertyIndex] = buffer[offset];
			this.targetObject.matrixWorldNeedsUpdate = true;
		} // HasToFromArray


		_setValue_fromArray(buffer, offset) {
			this.resolvedProperty.fromArray(buffer, offset);
		}

		_setValue_fromArray_setNeedsUpdate(buffer, offset) {
			this.resolvedProperty.fromArray(buffer, offset);
			this.targetObject.needsUpdate = true;
		}

		_setValue_fromArray_setMatrixWorldNeedsUpdate(buffer, offset) {
			this.resolvedProperty.fromArray(buffer, offset);
			this.targetObject.matrixWorldNeedsUpdate = true;
		}

		_getValue_unbound(targetArray, offset) {
			this.bind();
			this.getValue(targetArray, offset);
		}

		_setValue_unbound(sourceArray, offset) {
			this.bind();
			this.setValue(sourceArray, offset);
		} // create getter / setter pair for a property in the scene graph


		bind() {
			let targetObject = this.node;
			const parsedPath = this.parsedPath;
			const objectName = parsedPath.objectName;
			const propertyName = parsedPath.propertyName;
			let propertyIndex = parsedPath.propertyIndex;

			if (!targetObject) {
				targetObject = PropertyBinding.findNode(this.rootNode, parsedPath.nodeName) || this.rootNode;
				this.node = targetObject;
			} // set fail state so we can just 'return' on error


			this.getValue = this._getValue_unavailable;
			this.setValue = this._setValue_unavailable; // ensure there is a value node

			if (!targetObject) {
				console.error('THREE.PropertyBinding: Trying to update node for track: ' + this.path + ' but it wasn\'t found.');
				return;
			}

			if (objectName) {
				let objectIndex = parsedPath.objectIndex; // special cases were we need to reach deeper into the hierarchy to get the face materials....

				switch (objectName) {
					case 'materials':
						if (!targetObject.material) {
							console.error('THREE.PropertyBinding: Can not bind to material as node does not have a material.', this);
							return;
						}

						if (!targetObject.material.materials) {
							console.error('THREE.PropertyBinding: Can not bind to material.materials as node.material does not have a materials array.', this);
							return;
						}

						targetObject = targetObject.material.materials;
						break;

					case 'bones':
						if (!targetObject.skeleton) {
							console.error('THREE.PropertyBinding: Can not bind to bones as node does not have a skeleton.', this);
							return;
						} // potential future optimization: skip this if propertyIndex is already an integer
						// and convert the integer string to a true integer.


						targetObject = targetObject.skeleton.bones; // support resolving morphTarget names into indices.

						for (let i = 0; i < targetObject.length; i++) {
							if (targetObject[i].name === objectIndex) {
								objectIndex = i;
								break;
							}
						}

						break;

					default:
						if (targetObject[objectName] === undefined) {
							console.error('THREE.PropertyBinding: Can not bind to objectName of node undefined.', this);
							return;
						}

						targetObject = targetObject[objectName];
				}

				if (objectIndex !== undefined) {
					if (targetObject[objectIndex] === undefined) {
						console.error('THREE.PropertyBinding: Trying to bind to objectIndex of objectName, but is undefined.', this, targetObject);
						return;
					}

					targetObject = targetObject[objectIndex];
				}
			} // resolve property


			const nodeProperty = targetObject[propertyName];

			if (nodeProperty === undefined) {
				const nodeName = parsedPath.nodeName;
				console.error('THREE.PropertyBinding: Trying to update property for track: ' + nodeName + '.' + propertyName + ' but it wasn\'t found.', targetObject);
				return;
			} // determine versioning scheme


			let versioning = this.Versioning.None;
			this.targetObject = targetObject;

			if (targetObject.needsUpdate !== undefined) {
				// material
				versioning = this.Versioning.NeedsUpdate;
			} else if (targetObject.matrixWorldNeedsUpdate !== undefined) {
				// node transform
				versioning = this.Versioning.MatrixWorldNeedsUpdate;
			} // determine how the property gets bound


			let bindingType = this.BindingType.Direct;

			if (propertyIndex !== undefined) {
				// access a sub element of the property array (only primitives are supported right now)
				if (propertyName === 'morphTargetInfluences') {
					// potential optimization, skip this if propertyIndex is already an integer, and convert the integer string to a true integer.
					// support resolving morphTarget names into indices.
					if (!targetObject.geometry) {
						console.error('THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.', this);
						return;
					}

					if (!targetObject.geometry.morphAttributes) {
						console.error('THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphAttributes.', this);
						return;
					}

					if (targetObject.morphTargetDictionary[propertyIndex] !== undefined) {
						propertyIndex = targetObject.morphTargetDictionary[propertyIndex];
					}
				}

				bindingType = this.BindingType.ArrayElement;
				this.resolvedProperty = nodeProperty;
				this.propertyIndex = propertyIndex;
			} else if (nodeProperty.fromArray !== undefined && nodeProperty.toArray !== undefined) {
				// must use copy for Object3D.Euler/Quaternion
				bindingType = this.BindingType.HasFromToArray;
				this.resolvedProperty = nodeProperty;
			} else if (Array.isArray(nodeProperty)) {
				bindingType = this.BindingType.EntireArray;
				this.resolvedProperty = nodeProperty;
			} else {
				this.propertyName = propertyName;
			} // select getter / setter


			this.getValue = this.GetterByBindingType[bindingType];
			this.setValue = this.SetterByBindingTypeAndVersioning[bindingType][versioning];
		}

		unbind() {
			this.node = null; // back to the prototype version of getValue / setValue
			// note: avoiding to mutate the shape of 'this' via 'delete'

			this.getValue = this._getValue_unbound;
			this.setValue = this._setValue_unbound;
		}

	}

	PropertyBinding.Composite = Composite;
	PropertyBinding.prototype.BindingType = {
		Direct: 0,
		EntireArray: 1,
		ArrayElement: 2,
		HasFromToArray: 3
	};
	PropertyBinding.prototype.Versioning = {
		None: 0,
		NeedsUpdate: 1,
		MatrixWorldNeedsUpdate: 2
	};
	PropertyBinding.prototype.GetterByBindingType = [PropertyBinding.prototype._getValue_direct, PropertyBinding.prototype._getValue_array, PropertyBinding.prototype._getValue_arrayElement, PropertyBinding.prototype._getValue_toArray];
	PropertyBinding.prototype.SetterByBindingTypeAndVersioning = [[// Direct
	PropertyBinding.prototype._setValue_direct, PropertyBinding.prototype._setValue_direct_setNeedsUpdate, PropertyBinding.prototype._setValue_direct_setMatrixWorldNeedsUpdate], [// EntireArray
	PropertyBinding.prototype._setValue_array, PropertyBinding.prototype._setValue_array_setNeedsUpdate, PropertyBinding.prototype._setValue_array_setMatrixWorldNeedsUpdate], [// ArrayElement
	PropertyBinding.prototype._setValue_arrayElement, PropertyBinding.prototype._setValue_arrayElement_setNeedsUpdate, PropertyBinding.prototype._setValue_arrayElement_setMatrixWorldNeedsUpdate], [// HasToFromArray
	PropertyBinding.prototype._setValue_fromArray, PropertyBinding.prototype._setValue_fromArray_setNeedsUpdate, PropertyBinding.prototype._setValue_fromArray_setMatrixWorldNeedsUpdate]];

	/**
	 *
	 * A group of objects that receives a shared animation state.
	 *
	 * Usage:
	 *
	 *	- Add objects you would otherwise pass as 'root' to the
	 *		constructor or the .clipAction method of AnimationMixer.
	 *
	 *	- Instead pass this object as 'root'.
	 *
	 *	- You can also add and remove objects later when the mixer
	 *		is running.
	 *
	 * Note:
	 *
	 *		Objects of this class appear as one object to the mixer,
	 *		so cache control of the individual objects must be done
	 *		on the group.
	 *
	 * Limitation:
	 *
	 *	- The animated properties must be compatible among the
	 *		all objects in the group.
	 *
	 *	- A single property can either be controlled through a
	 *		target group or directly, but not both.
	 */

	class AnimationObjectGroup {
		constructor() {
			this.isAnimationObjectGroup = true;
			this.uuid = generateUUID(); // cached objects followed by the active ones

			this._objects = Array.prototype.slice.call(arguments);
			this.nCachedObjects_ = 0; // threshold
			// note: read by PropertyBinding.Composite

			const indices = {};
			this._indicesByUUID = indices; // for bookkeeping

			for (let i = 0, n = arguments.length; i !== n; ++i) {
				indices[arguments[i].uuid] = i;
			}

			this._paths = []; // inside: string

			this._parsedPaths = []; // inside: { we don't care, here }

			this._bindings = []; // inside: Array< PropertyBinding >

			this._bindingsIndicesByPath = {}; // inside: indices in these arrays

			const scope = this;
			this.stats = {
				objects: {
					get total() {
						return scope._objects.length;
					},

					get inUse() {
						return this.total - scope.nCachedObjects_;
					}

				},

				get bindingsPerObject() {
					return scope._bindings.length;
				}

			};
		}

		add() {
			const objects = this._objects,
						indicesByUUID = this._indicesByUUID,
						paths = this._paths,
						parsedPaths = this._parsedPaths,
						bindings = this._bindings,
						nBindings = bindings.length;
			let knownObject = undefined,
					nObjects = objects.length,
					nCachedObjects = this.nCachedObjects_;

			for (let i = 0, n = arguments.length; i !== n; ++i) {
				const object = arguments[i],
							uuid = object.uuid;
				let index = indicesByUUID[uuid];

				if (index === undefined) {
					// unknown object -> add it to the ACTIVE region
					index = nObjects++;
					indicesByUUID[uuid] = index;
					objects.push(object); // accounting is done, now do the same for all bindings

					for (let j = 0, m = nBindings; j !== m; ++j) {
						bindings[j].push(new PropertyBinding(object, paths[j], parsedPaths[j]));
					}
				} else if (index < nCachedObjects) {
					knownObject = objects[index]; // move existing object to the ACTIVE region

					const firstActiveIndex = --nCachedObjects,
								lastCachedObject = objects[firstActiveIndex];
					indicesByUUID[lastCachedObject.uuid] = index;
					objects[index] = lastCachedObject;
					indicesByUUID[uuid] = firstActiveIndex;
					objects[firstActiveIndex] = object; // accounting is done, now do the same for all bindings

					for (let j = 0, m = nBindings; j !== m; ++j) {
						const bindingsForPath = bindings[j],
									lastCached = bindingsForPath[firstActiveIndex];
						let binding = bindingsForPath[index];
						bindingsForPath[index] = lastCached;

						if (binding === undefined) {
							// since we do not bother to create new bindings
							// for objects that are cached, the binding may
							// or may not exist
							binding = new PropertyBinding(object, paths[j], parsedPaths[j]);
						}

						bindingsForPath[firstActiveIndex] = binding;
					}
				} else if (objects[index] !== knownObject) {
					console.error('THREE.AnimationObjectGroup: Different objects with the same UUID ' + 'detected. Clean the caches or recreate your infrastructure when reloading scenes.');
				} // else the object is already where we want it to be

			} // for arguments


			this.nCachedObjects_ = nCachedObjects;
		}

		remove() {
			const objects = this._objects,
						indicesByUUID = this._indicesByUUID,
						bindings = this._bindings,
						nBindings = bindings.length;
			let nCachedObjects = this.nCachedObjects_;

			for (let i = 0, n = arguments.length; i !== n; ++i) {
				const object = arguments[i],
							uuid = object.uuid,
							index = indicesByUUID[uuid];

				if (index !== undefined && index >= nCachedObjects) {
					// move existing object into the CACHED region
					const lastCachedIndex = nCachedObjects++,
								firstActiveObject = objects[lastCachedIndex];
					indicesByUUID[firstActiveObject.uuid] = index;
					objects[index] = firstActiveObject;
					indicesByUUID[uuid] = lastCachedIndex;
					objects[lastCachedIndex] = object; // accounting is done, now do the same for all bindings

					for (let j = 0, m = nBindings; j !== m; ++j) {
						const bindingsForPath = bindings[j],
									firstActive = bindingsForPath[lastCachedIndex],
									binding = bindingsForPath[index];
						bindingsForPath[index] = firstActive;
						bindingsForPath[lastCachedIndex] = binding;
					}
				}
			} // for arguments


			this.nCachedObjects_ = nCachedObjects;
		} // remove & forget


		uncache() {
			const objects = this._objects,
						indicesByUUID = this._indicesByUUID,
						bindings = this._bindings,
						nBindings = bindings.length;
			let nCachedObjects = this.nCachedObjects_,
					nObjects = objects.length;

			for (let i = 0, n = arguments.length; i !== n; ++i) {
				const object = arguments[i],
							uuid = object.uuid,
							index = indicesByUUID[uuid];

				if (index !== undefined) {
					delete indicesByUUID[uuid];

					if (index < nCachedObjects) {
						// object is cached, shrink the CACHED region
						const firstActiveIndex = --nCachedObjects,
									lastCachedObject = objects[firstActiveIndex],
									lastIndex = --nObjects,
									lastObject = objects[lastIndex]; // last cached object takes this object's place

						indicesByUUID[lastCachedObject.uuid] = index;
						objects[index] = lastCachedObject; // last object goes to the activated slot and pop

						indicesByUUID[lastObject.uuid] = firstActiveIndex;
						objects[firstActiveIndex] = lastObject;
						objects.pop(); // accounting is done, now do the same for all bindings

						for (let j = 0, m = nBindings; j !== m; ++j) {
							const bindingsForPath = bindings[j],
										lastCached = bindingsForPath[firstActiveIndex],
										last = bindingsForPath[lastIndex];
							bindingsForPath[index] = lastCached;
							bindingsForPath[firstActiveIndex] = last;
							bindingsForPath.pop();
						}
					} else {
						// object is active, just swap with the last and pop
						const lastIndex = --nObjects,
									lastObject = objects[lastIndex];

						if (lastIndex > 0) {
							indicesByUUID[lastObject.uuid] = index;
						}

						objects[index] = lastObject;
						objects.pop(); // accounting is done, now do the same for all bindings

						for (let j = 0, m = nBindings; j !== m; ++j) {
							const bindingsForPath = bindings[j];
							bindingsForPath[index] = bindingsForPath[lastIndex];
							bindingsForPath.pop();
						}
					} // cached or active

				} // if object is known

			} // for arguments


			this.nCachedObjects_ = nCachedObjects;
		} // Internal interface used by befriended PropertyBinding.Composite:


		subscribe_(path, parsedPath) {
			// returns an array of bindings for the given path that is changed
			// according to the contained objects in the group
			const indicesByPath = this._bindingsIndicesByPath;
			let index = indicesByPath[path];
			const bindings = this._bindings;
			if (index !== undefined) return bindings[index];
			const paths = this._paths,
						parsedPaths = this._parsedPaths,
						objects = this._objects,
						nObjects = objects.length,
						nCachedObjects = this.nCachedObjects_,
						bindingsForPath = new Array(nObjects);
			index = bindings.length;
			indicesByPath[path] = index;
			paths.push(path);
			parsedPaths.push(parsedPath);
			bindings.push(bindingsForPath);

			for (let i = nCachedObjects, n = objects.length; i !== n; ++i) {
				const object = objects[i];
				bindingsForPath[i] = new PropertyBinding(object, path, parsedPath);
			}

			return bindingsForPath;
		}

		unsubscribe_(path) {
			// tells the group to forget about a property path and no longer
			// update the array previously obtained with 'subscribe_'
			const indicesByPath = this._bindingsIndicesByPath,
						index = indicesByPath[path];

			if (index !== undefined) {
				const paths = this._paths,
							parsedPaths = this._parsedPaths,
							bindings = this._bindings,
							lastBindingsIndex = bindings.length - 1,
							lastBindings = bindings[lastBindingsIndex],
							lastBindingsPath = path[lastBindingsIndex];
				indicesByPath[lastBindingsPath] = index;
				bindings[index] = lastBindings;
				bindings.pop();
				parsedPaths[index] = parsedPaths[lastBindingsIndex];
				parsedPaths.pop();
				paths[index] = paths[lastBindingsIndex];
				paths.pop();
			}
		}

	}

	class AnimationAction {
		constructor(mixer, clip, localRoot = null, blendMode = clip.blendMode) {
			this._mixer = mixer;
			this._clip = clip;
			this._localRoot = localRoot;
			this.blendMode = blendMode;
			const tracks = clip.tracks,
						nTracks = tracks.length,
						interpolants = new Array(nTracks);
			const interpolantSettings = {
				endingStart: ZeroCurvatureEnding,
				endingEnd: ZeroCurvatureEnding
			};

			for (let i = 0; i !== nTracks; ++i) {
				const interpolant = tracks[i].createInterpolant(null);
				interpolants[i] = interpolant;
				interpolant.settings = interpolantSettings;
			}

			this._interpolantSettings = interpolantSettings;
			this._interpolants = interpolants; // bound by the mixer
			// inside: PropertyMixer (managed by the mixer)

			this._propertyBindings = new Array(nTracks);
			this._cacheIndex = null; // for the memory manager

			this._byClipCacheIndex = null; // for the memory manager

			this._timeScaleInterpolant = null;
			this._weightInterpolant = null;
			this.loop = LoopRepeat;
			this._loopCount = -1; // global mixer time when the action is to be started
			// it's set back to 'null' upon start of the action

			this._startTime = null; // scaled local time of the action
			// gets clamped or wrapped to 0..clip.duration according to loop

			this.time = 0;
			this.timeScale = 1;
			this._effectiveTimeScale = 1;
			this.weight = 1;
			this._effectiveWeight = 1;
			this.repetitions = Infinity; // no. of repetitions when looping

			this.paused = false; // true -> zero effective time scale

			this.enabled = true; // false -> zero effective weight

			this.clampWhenFinished = false; // keep feeding the last frame?

			this.zeroSlopeAtStart = true; // for smooth interpolation w/o separate

			this.zeroSlopeAtEnd = true; // clips for start, loop and end
		} // State & Scheduling


		play() {
			this._mixer._activateAction(this);

			return this;
		}

		stop() {
			this._mixer._deactivateAction(this);

			return this.reset();
		}

		reset() {
			this.paused = false;
			this.enabled = true;
			this.time = 0; // restart clip

			this._loopCount = -1; // forget previous loops

			this._startTime = null; // forget scheduling

			return this.stopFading().stopWarping();
		}

		isRunning() {
			return this.enabled && !this.paused && this.timeScale !== 0 && this._startTime === null && this._mixer._isActiveAction(this);
		} // return true when play has been called


		isScheduled() {
			return this._mixer._isActiveAction(this);
		}

		startAt(time) {
			this._startTime = time;
			return this;
		}

		setLoop(mode, repetitions) {
			this.loop = mode;
			this.repetitions = repetitions;
			return this;
		} // Weight
		// set the weight stopping any scheduled fading
		// although .enabled = false yields an effective weight of zero, this
		// method does *not* change .enabled, because it would be confusing


		setEffectiveWeight(weight) {
			this.weight = weight; // note: same logic as when updated at runtime

			this._effectiveWeight = this.enabled ? weight : 0;
			return this.stopFading();
		} // return the weight considering fading and .enabled


		getEffectiveWeight() {
			return this._effectiveWeight;
		}

		fadeIn(duration) {
			return this._scheduleFading(duration, 0, 1);
		}

		fadeOut(duration) {
			return this._scheduleFading(duration, 1, 0);
		}

		crossFadeFrom(fadeOutAction, duration, warp) {
			fadeOutAction.fadeOut(duration);
			this.fadeIn(duration);

			if (warp) {
				const fadeInDuration = this._clip.duration,
							fadeOutDuration = fadeOutAction._clip.duration,
							startEndRatio = fadeOutDuration / fadeInDuration,
							endStartRatio = fadeInDuration / fadeOutDuration;
				fadeOutAction.warp(1.0, startEndRatio, duration);
				this.warp(endStartRatio, 1.0, duration);
			}

			return this;
		}

		crossFadeTo(fadeInAction, duration, warp) {
			return fadeInAction.crossFadeFrom(this, duration, warp);
		}

		stopFading() {
			const weightInterpolant = this._weightInterpolant;

			if (weightInterpolant !== null) {
				this._weightInterpolant = null;

				this._mixer._takeBackControlInterpolant(weightInterpolant);
			}

			return this;
		} // Time Scale Control
		// set the time scale stopping any scheduled warping
		// although .paused = true yields an effective time scale of zero, this
		// method does *not* change .paused, because it would be confusing


		setEffectiveTimeScale(timeScale) {
			this.timeScale = timeScale;
			this._effectiveTimeScale = this.paused ? 0 : timeScale;
			return this.stopWarping();
		} // return the time scale considering warping and .paused


		getEffectiveTimeScale() {
			return this._effectiveTimeScale;
		}

		setDuration(duration) {
			this.timeScale = this._clip.duration / duration;
			return this.stopWarping();
		}

		syncWith(action) {
			this.time = action.time;
			this.timeScale = action.timeScale;
			return this.stopWarping();
		}

		halt(duration) {
			return this.warp(this._effectiveTimeScale, 0, duration);
		}

		warp(startTimeScale, endTimeScale, duration) {
			const mixer = this._mixer,
						now = mixer.time,
						timeScale = this.timeScale;
			let interpolant = this._timeScaleInterpolant;

			if (interpolant === null) {
				interpolant = mixer._lendControlInterpolant();
				this._timeScaleInterpolant = interpolant;
			}

			const times = interpolant.parameterPositions,
						values = interpolant.sampleValues;
			times[0] = now;
			times[1] = now + duration;
			values[0] = startTimeScale / timeScale;
			values[1] = endTimeScale / timeScale;
			return this;
		}

		stopWarping() {
			const timeScaleInterpolant = this._timeScaleInterpolant;

			if (timeScaleInterpolant !== null) {
				this._timeScaleInterpolant = null;

				this._mixer._takeBackControlInterpolant(timeScaleInterpolant);
			}

			return this;
		} // Object Accessors


		getMixer() {
			return this._mixer;
		}

		getClip() {
			return this._clip;
		}

		getRoot() {
			return this._localRoot || this._mixer._root;
		} // Interna


		_update(time, deltaTime, timeDirection, accuIndex) {
			// called by the mixer
			if (!this.enabled) {
				// call ._updateWeight() to update ._effectiveWeight
				this._updateWeight(time);

				return;
			}

			const startTime = this._startTime;

			if (startTime !== null) {
				// check for scheduled start of action
				const timeRunning = (time - startTime) * timeDirection;

				if (timeRunning < 0 || timeDirection === 0) {
					return; // yet to come / don't decide when delta = 0
				} // start


				this._startTime = null; // unschedule

				deltaTime = timeDirection * timeRunning;
			} // apply time scale and advance time


			deltaTime *= this._updateTimeScale(time);

			const clipTime = this._updateTime(deltaTime); // note: _updateTime may disable the action resulting in
			// an effective weight of 0


			const weight = this._updateWeight(time);

			if (weight > 0) {
				const interpolants = this._interpolants;
				const propertyMixers = this._propertyBindings;

				switch (this.blendMode) {
					case AdditiveAnimationBlendMode:
						for (let j = 0, m = interpolants.length; j !== m; ++j) {
							interpolants[j].evaluate(clipTime);
							propertyMixers[j].accumulateAdditive(weight);
						}

						break;

					case NormalAnimationBlendMode:
					default:
						for (let j = 0, m = interpolants.length; j !== m; ++j) {
							interpolants[j].evaluate(clipTime);
							propertyMixers[j].accumulate(accuIndex, weight);
						}

				}
			}
		}

		_updateWeight(time) {
			let weight = 0;

			if (this.enabled) {
				weight = this.weight;
				const interpolant = this._weightInterpolant;

				if (interpolant !== null) {
					const interpolantValue = interpolant.evaluate(time)[0];
					weight *= interpolantValue;

					if (time > interpolant.parameterPositions[1]) {
						this.stopFading();

						if (interpolantValue === 0) {
							// faded out, disable
							this.enabled = false;
						}
					}
				}
			}

			this._effectiveWeight = weight;
			return weight;
		}

		_updateTimeScale(time) {
			let timeScale = 0;

			if (!this.paused) {
				timeScale = this.timeScale;
				const interpolant = this._timeScaleInterpolant;

				if (interpolant !== null) {
					const interpolantValue = interpolant.evaluate(time)[0];
					timeScale *= interpolantValue;

					if (time > interpolant.parameterPositions[1]) {
						this.stopWarping();

						if (timeScale === 0) {
							// motion has halted, pause
							this.paused = true;
						} else {
							// warp done - apply final time scale
							this.timeScale = timeScale;
						}
					}
				}
			}

			this._effectiveTimeScale = timeScale;
			return timeScale;
		}

		_updateTime(deltaTime) {
			const duration = this._clip.duration;
			const loop = this.loop;
			let time = this.time + deltaTime;
			let loopCount = this._loopCount;
			const pingPong = loop === LoopPingPong;

			if (deltaTime === 0) {
				if (loopCount === -1) return time;
				return pingPong && (loopCount & 1) === 1 ? duration - time : time;
			}

			if (loop === LoopOnce) {
				if (loopCount === -1) {
					// just started
					this._loopCount = 0;

					this._setEndings(true, true, false);
				}

				handle_stop: {
					if (time >= duration) {
						time = duration;
					} else if (time < 0) {
						time = 0;
					} else {
						this.time = time;
						break handle_stop;
					}

					if (this.clampWhenFinished) this.paused = true;else this.enabled = false;
					this.time = time;

					this._mixer.dispatchEvent({
						type: 'finished',
						action: this,
						direction: deltaTime < 0 ? -1 : 1
					});
				}
			} else {
				// repetitive Repeat or PingPong
				if (loopCount === -1) {
					// just started
					if (deltaTime >= 0) {
						loopCount = 0;

						this._setEndings(true, this.repetitions === 0, pingPong);
					} else {
						// when looping in reverse direction, the initial
						// transition through zero counts as a repetition,
						// so leave loopCount at -1
						this._setEndings(this.repetitions === 0, true, pingPong);
					}
				}

				if (time >= duration || time < 0) {
					// wrap around
					const loopDelta = Math.floor(time / duration); // signed

					time -= duration * loopDelta;
					loopCount += Math.abs(loopDelta);
					const pending = this.repetitions - loopCount;

					if (pending <= 0) {
						// have to stop (switch state, clamp time, fire event)
						if (this.clampWhenFinished) this.paused = true;else this.enabled = false;
						time = deltaTime > 0 ? duration : 0;
						this.time = time;

						this._mixer.dispatchEvent({
							type: 'finished',
							action: this,
							direction: deltaTime > 0 ? 1 : -1
						});
					} else {
						// keep running
						if (pending === 1) {
							// entering the last round
							const atStart = deltaTime < 0;

							this._setEndings(atStart, !atStart, pingPong);
						} else {
							this._setEndings(false, false, pingPong);
						}

						this._loopCount = loopCount;
						this.time = time;

						this._mixer.dispatchEvent({
							type: 'loop',
							action: this,
							loopDelta: loopDelta
						});
					}
				} else {
					this.time = time;
				}

				if (pingPong && (loopCount & 1) === 1) {
					// invert time for the "pong round"
					return duration - time;
				}
			}

			return time;
		}

		_setEndings(atStart, atEnd, pingPong) {
			const settings = this._interpolantSettings;

			if (pingPong) {
				settings.endingStart = ZeroSlopeEnding;
				settings.endingEnd = ZeroSlopeEnding;
			} else {
				// assuming for LoopOnce atStart == atEnd == true
				if (atStart) {
					settings.endingStart = this.zeroSlopeAtStart ? ZeroSlopeEnding : ZeroCurvatureEnding;
				} else {
					settings.endingStart = WrapAroundEnding;
				}

				if (atEnd) {
					settings.endingEnd = this.zeroSlopeAtEnd ? ZeroSlopeEnding : ZeroCurvatureEnding;
				} else {
					settings.endingEnd = WrapAroundEnding;
				}
			}
		}

		_scheduleFading(duration, weightNow, weightThen) {
			const mixer = this._mixer,
						now = mixer.time;
			let interpolant = this._weightInterpolant;

			if (interpolant === null) {
				interpolant = mixer._lendControlInterpolant();
				this._weightInterpolant = interpolant;
			}

			const times = interpolant.parameterPositions,
						values = interpolant.sampleValues;
			times[0] = now;
			values[0] = weightNow;
			times[1] = now + duration;
			values[1] = weightThen;
			return this;
		}

	}

	const _controlInterpolantsResultBuffer = new Float32Array(1);

	class AnimationMixer extends EventDispatcher {
		constructor(root) {
			super();
			this._root = root;

			this._initMemoryManager();

			this._accuIndex = 0;
			this.time = 0;
			this.timeScale = 1.0;
		}

		_bindAction(action, prototypeAction) {
			const root = action._localRoot || this._root,
						tracks = action._clip.tracks,
						nTracks = tracks.length,
						bindings = action._propertyBindings,
						interpolants = action._interpolants,
						rootUuid = root.uuid,
						bindingsByRoot = this._bindingsByRootAndName;
			let bindingsByName = bindingsByRoot[rootUuid];

			if (bindingsByName === undefined) {
				bindingsByName = {};
				bindingsByRoot[rootUuid] = bindingsByName;
			}

			for (let i = 0; i !== nTracks; ++i) {
				const track = tracks[i],
							trackName = track.name;
				let binding = bindingsByName[trackName];

				if (binding !== undefined) {
					++binding.referenceCount;
					bindings[i] = binding;
				} else {
					binding = bindings[i];

					if (binding !== undefined) {
						// existing binding, make sure the cache knows
						if (binding._cacheIndex === null) {
							++binding.referenceCount;

							this._addInactiveBinding(binding, rootUuid, trackName);
						}

						continue;
					}

					const path = prototypeAction && prototypeAction._propertyBindings[i].binding.parsedPath;
					binding = new PropertyMixer(PropertyBinding.create(root, trackName, path), track.ValueTypeName, track.getValueSize());
					++binding.referenceCount;

					this._addInactiveBinding(binding, rootUuid, trackName);

					bindings[i] = binding;
				}

				interpolants[i].resultBuffer = binding.buffer;
			}
		}

		_activateAction(action) {
			if (!this._isActiveAction(action)) {
				if (action._cacheIndex === null) {
					// this action has been forgotten by the cache, but the user
					// appears to be still using it -> rebind
					const rootUuid = (action._localRoot || this._root).uuid,
								clipUuid = action._clip.uuid,
								actionsForClip = this._actionsByClip[clipUuid];

					this._bindAction(action, actionsForClip && actionsForClip.knownActions[0]);

					this._addInactiveAction(action, clipUuid, rootUuid);
				}

				const bindings = action._propertyBindings; // increment reference counts / sort out state

				for (let i = 0, n = bindings.length; i !== n; ++i) {
					const binding = bindings[i];

					if (binding.useCount++ === 0) {
						this._lendBinding(binding);

						binding.saveOriginalState();
					}
				}

				this._lendAction(action);
			}
		}

		_deactivateAction(action) {
			if (this._isActiveAction(action)) {
				const bindings = action._propertyBindings; // decrement reference counts / sort out state

				for (let i = 0, n = bindings.length; i !== n; ++i) {
					const binding = bindings[i];

					if (--binding.useCount === 0) {
						binding.restoreOriginalState();

						this._takeBackBinding(binding);
					}
				}

				this._takeBackAction(action);
			}
		} // Memory manager


		_initMemoryManager() {
			this._actions = []; // 'nActiveActions' followed by inactive ones

			this._nActiveActions = 0;
			this._actionsByClip = {}; // inside:
			// {
			// 	knownActions: Array< AnimationAction > - used as prototypes
			// 	actionByRoot: AnimationAction - lookup
			// }

			this._bindings = []; // 'nActiveBindings' followed by inactive ones

			this._nActiveBindings = 0;
			this._bindingsByRootAndName = {}; // inside: Map< name, PropertyMixer >

			this._controlInterpolants = []; // same game as above

			this._nActiveControlInterpolants = 0;
			const scope = this;
			this.stats = {
				actions: {
					get total() {
						return scope._actions.length;
					},

					get inUse() {
						return scope._nActiveActions;
					}

				},
				bindings: {
					get total() {
						return scope._bindings.length;
					},

					get inUse() {
						return scope._nActiveBindings;
					}

				},
				controlInterpolants: {
					get total() {
						return scope._controlInterpolants.length;
					},

					get inUse() {
						return scope._nActiveControlInterpolants;
					}

				}
			};
		} // Memory management for AnimationAction objects


		_isActiveAction(action) {
			const index = action._cacheIndex;
			return index !== null && index < this._nActiveActions;
		}

		_addInactiveAction(action, clipUuid, rootUuid) {
			const actions = this._actions,
						actionsByClip = this._actionsByClip;
			let actionsForClip = actionsByClip[clipUuid];

			if (actionsForClip === undefined) {
				actionsForClip = {
					knownActions: [action],
					actionByRoot: {}
				};
				action._byClipCacheIndex = 0;
				actionsByClip[clipUuid] = actionsForClip;
			} else {
				const knownActions = actionsForClip.knownActions;
				action._byClipCacheIndex = knownActions.length;
				knownActions.push(action);
			}

			action._cacheIndex = actions.length;
			actions.push(action);
			actionsForClip.actionByRoot[rootUuid] = action;
		}

		_removeInactiveAction(action) {
			const actions = this._actions,
						lastInactiveAction = actions[actions.length - 1],
						cacheIndex = action._cacheIndex;
			lastInactiveAction._cacheIndex = cacheIndex;
			actions[cacheIndex] = lastInactiveAction;
			actions.pop();
			action._cacheIndex = null;
			const clipUuid = action._clip.uuid,
						actionsByClip = this._actionsByClip,
						actionsForClip = actionsByClip[clipUuid],
						knownActionsForClip = actionsForClip.knownActions,
						lastKnownAction = knownActionsForClip[knownActionsForClip.length - 1],
						byClipCacheIndex = action._byClipCacheIndex;
			lastKnownAction._byClipCacheIndex = byClipCacheIndex;
			knownActionsForClip[byClipCacheIndex] = lastKnownAction;
			knownActionsForClip.pop();
			action._byClipCacheIndex = null;
			const actionByRoot = actionsForClip.actionByRoot,
						rootUuid = (action._localRoot || this._root).uuid;
			delete actionByRoot[rootUuid];

			if (knownActionsForClip.length === 0) {
				delete actionsByClip[clipUuid];
			}

			this._removeInactiveBindingsForAction(action);
		}

		_removeInactiveBindingsForAction(action) {
			const bindings = action._propertyBindings;

			for (let i = 0, n = bindings.length; i !== n; ++i) {
				const binding = bindings[i];

				if (--binding.referenceCount === 0) {
					this._removeInactiveBinding(binding);
				}
			}
		}

		_lendAction(action) {
			// [ active actions |	inactive actions	]
			// [	active actions >| inactive actions ]
			//								 s				a
			//									<-swap->
			//								 a				s
			const actions = this._actions,
						prevIndex = action._cacheIndex,
						lastActiveIndex = this._nActiveActions++,
						firstInactiveAction = actions[lastActiveIndex];
			action._cacheIndex = lastActiveIndex;
			actions[lastActiveIndex] = action;
			firstInactiveAction._cacheIndex = prevIndex;
			actions[prevIndex] = firstInactiveAction;
		}

		_takeBackAction(action) {
			// [	active actions	| inactive actions ]
			// [ active actions |< inactive actions	]
			//				a				s
			//				 <-swap->
			//				s				a
			const actions = this._actions,
						prevIndex = action._cacheIndex,
						firstInactiveIndex = --this._nActiveActions,
						lastActiveAction = actions[firstInactiveIndex];
			action._cacheIndex = firstInactiveIndex;
			actions[firstInactiveIndex] = action;
			lastActiveAction._cacheIndex = prevIndex;
			actions[prevIndex] = lastActiveAction;
		} // Memory management for PropertyMixer objects


		_addInactiveBinding(binding, rootUuid, trackName) {
			const bindingsByRoot = this._bindingsByRootAndName,
						bindings = this._bindings;
			let bindingByName = bindingsByRoot[rootUuid];

			if (bindingByName === undefined) {
				bindingByName = {};
				bindingsByRoot[rootUuid] = bindingByName;
			}

			bindingByName[trackName] = binding;
			binding._cacheIndex = bindings.length;
			bindings.push(binding);
		}

		_removeInactiveBinding(binding) {
			const bindings = this._bindings,
						propBinding = binding.binding,
						rootUuid = propBinding.rootNode.uuid,
						trackName = propBinding.path,
						bindingsByRoot = this._bindingsByRootAndName,
						bindingByName = bindingsByRoot[rootUuid],
						lastInactiveBinding = bindings[bindings.length - 1],
						cacheIndex = binding._cacheIndex;
			lastInactiveBinding._cacheIndex = cacheIndex;
			bindings[cacheIndex] = lastInactiveBinding;
			bindings.pop();
			delete bindingByName[trackName];

			if (Object.keys(bindingByName).length === 0) {
				delete bindingsByRoot[rootUuid];
			}
		}

		_lendBinding(binding) {
			const bindings = this._bindings,
						prevIndex = binding._cacheIndex,
						lastActiveIndex = this._nActiveBindings++,
						firstInactiveBinding = bindings[lastActiveIndex];
			binding._cacheIndex = lastActiveIndex;
			bindings[lastActiveIndex] = binding;
			firstInactiveBinding._cacheIndex = prevIndex;
			bindings[prevIndex] = firstInactiveBinding;
		}

		_takeBackBinding(binding) {
			const bindings = this._bindings,
						prevIndex = binding._cacheIndex,
						firstInactiveIndex = --this._nActiveBindings,
						lastActiveBinding = bindings[firstInactiveIndex];
			binding._cacheIndex = firstInactiveIndex;
			bindings[firstInactiveIndex] = binding;
			lastActiveBinding._cacheIndex = prevIndex;
			bindings[prevIndex] = lastActiveBinding;
		} // Memory management of Interpolants for weight and time scale


		_lendControlInterpolant() {
			const interpolants = this._controlInterpolants,
						lastActiveIndex = this._nActiveControlInterpolants++;
			let interpolant = interpolants[lastActiveIndex];

			if (interpolant === undefined) {
				interpolant = new LinearInterpolant(new Float32Array(2), new Float32Array(2), 1, _controlInterpolantsResultBuffer);
				interpolant.__cacheIndex = lastActiveIndex;
				interpolants[lastActiveIndex] = interpolant;
			}

			return interpolant;
		}

		_takeBackControlInterpolant(interpolant) {
			const interpolants = this._controlInterpolants,
						prevIndex = interpolant.__cacheIndex,
						firstInactiveIndex = --this._nActiveControlInterpolants,
						lastActiveInterpolant = interpolants[firstInactiveIndex];
			interpolant.__cacheIndex = firstInactiveIndex;
			interpolants[firstInactiveIndex] = interpolant;
			lastActiveInterpolant.__cacheIndex = prevIndex;
			interpolants[prevIndex] = lastActiveInterpolant;
		} // return an action for a clip optionally using a custom root target
		// object (this method allocates a lot of dynamic memory in case a
		// previously unknown clip/root combination is specified)


		clipAction(clip, optionalRoot, blendMode) {
			const root = optionalRoot || this._root,
						rootUuid = root.uuid;
			let clipObject = typeof clip === 'string' ? AnimationClip.findByName(root, clip) : clip;
			const clipUuid = clipObject !== null ? clipObject.uuid : clip;
			const actionsForClip = this._actionsByClip[clipUuid];
			let prototypeAction = null;

			if (blendMode === undefined) {
				if (clipObject !== null) {
					blendMode = clipObject.blendMode;
				} else {
					blendMode = NormalAnimationBlendMode;
				}
			}

			if (actionsForClip !== undefined) {
				const existingAction = actionsForClip.actionByRoot[rootUuid];

				if (existingAction !== undefined && existingAction.blendMode === blendMode) {
					return existingAction;
				} // we know the clip, so we don't have to parse all
				// the bindings again but can just copy


				prototypeAction = actionsForClip.knownActions[0]; // also, take the clip from the prototype action

				if (clipObject === null) clipObject = prototypeAction._clip;
			} // clip must be known when specified via string


			if (clipObject === null) return null; // allocate all resources required to run it

			const newAction = new AnimationAction(this, clipObject, optionalRoot, blendMode);

			this._bindAction(newAction, prototypeAction); // and make the action known to the memory manager


			this._addInactiveAction(newAction, clipUuid, rootUuid);

			return newAction;
		} // get an existing action


		existingAction(clip, optionalRoot) {
			const root = optionalRoot || this._root,
						rootUuid = root.uuid,
						clipObject = typeof clip === 'string' ? AnimationClip.findByName(root, clip) : clip,
						clipUuid = clipObject ? clipObject.uuid : clip,
						actionsForClip = this._actionsByClip[clipUuid];

			if (actionsForClip !== undefined) {
				return actionsForClip.actionByRoot[rootUuid] || null;
			}

			return null;
		} // deactivates all previously scheduled actions


		stopAllAction() {
			const actions = this._actions,
						nActions = this._nActiveActions;

			for (let i = nActions - 1; i >= 0; --i) {
				actions[i].stop();
			}

			return this;
		} // advance the time and update apply the animation


		update(deltaTime) {
			deltaTime *= this.timeScale;
			const actions = this._actions,
						nActions = this._nActiveActions,
						time = this.time += deltaTime,
						timeDirection = Math.sign(deltaTime),
						accuIndex = this._accuIndex ^= 1; // run active actions

			for (let i = 0; i !== nActions; ++i) {
				const action = actions[i];

				action._update(time, deltaTime, timeDirection, accuIndex);
			} // update scene graph


			const bindings = this._bindings,
						nBindings = this._nActiveBindings;

			for (let i = 0; i !== nBindings; ++i) {
				bindings[i].apply(accuIndex);
			}

			return this;
		} // Allows you to seek to a specific time in an animation.


		setTime(timeInSeconds) {
			this.time = 0; // Zero out time attribute for AnimationMixer object;

			for (let i = 0; i < this._actions.length; i++) {
				this._actions[i].time = 0; // Zero out time attribute for all associated AnimationAction objects.
			}

			return this.update(timeInSeconds); // Update used to set exact time. Returns "this" AnimationMixer object.
		} // return this mixer's root target object


		getRoot() {
			return this._root;
		} // free all resources specific to a particular clip


		uncacheClip(clip) {
			const actions = this._actions,
						clipUuid = clip.uuid,
						actionsByClip = this._actionsByClip,
						actionsForClip = actionsByClip[clipUuid];

			if (actionsForClip !== undefined) {
				// note: just calling _removeInactiveAction would mess up the
				// iteration state and also require updating the state we can
				// just throw away
				const actionsToRemove = actionsForClip.knownActions;

				for (let i = 0, n = actionsToRemove.length; i !== n; ++i) {
					const action = actionsToRemove[i];

					this._deactivateAction(action);

					const cacheIndex = action._cacheIndex,
								lastInactiveAction = actions[actions.length - 1];
					action._cacheIndex = null;
					action._byClipCacheIndex = null;
					lastInactiveAction._cacheIndex = cacheIndex;
					actions[cacheIndex] = lastInactiveAction;
					actions.pop();

					this._removeInactiveBindingsForAction(action);
				}

				delete actionsByClip[clipUuid];
			}
		} // free all resources specific to a particular root target object


		uncacheRoot(root) {
			const rootUuid = root.uuid,
						actionsByClip = this._actionsByClip;

			for (const clipUuid in actionsByClip) {
				const actionByRoot = actionsByClip[clipUuid].actionByRoot,
							action = actionByRoot[rootUuid];

				if (action !== undefined) {
					this._deactivateAction(action);

					this._removeInactiveAction(action);
				}
			}

			const bindingsByRoot = this._bindingsByRootAndName,
						bindingByName = bindingsByRoot[rootUuid];

			if (bindingByName !== undefined) {
				for (const trackName in bindingByName) {
					const binding = bindingByName[trackName];
					binding.restoreOriginalState();

					this._removeInactiveBinding(binding);
				}
			}
		} // remove a targeted clip from the cache


		uncacheAction(clip, optionalRoot) {
			const action = this.existingAction(clip, optionalRoot);

			if (action !== null) {
				this._deactivateAction(action);

				this._removeInactiveAction(action);
			}
		}

	}

	class Uniform {
		constructor(value) {
			if (typeof value === 'string') {
				console.warn('THREE.Uniform: Type parameter is no longer needed.');
				value = arguments[1];
			}

			this.value = value;
		}

		clone() {
			return new Uniform(this.value.clone === undefined ? this.value : this.value.clone());
		}

	}

	let id = 0;

	class UniformsGroup extends EventDispatcher {
		constructor() {
			super();
			this.isUniformsGroup = true;
			Object.defineProperty(this, 'id', {
				value: id++
			});
			this.name = '';
			this.usage = StaticDrawUsage;
			this.uniforms = [];
		}

		add(uniform) {
			this.uniforms.push(uniform);
			return this;
		}

		remove(uniform) {
			const index = this.uniforms.indexOf(uniform);
			if (index !== -1) this.uniforms.splice(index, 1);
			return this;
		}

		setName(name) {
			this.name = name;
			return this;
		}

		setUsage(value) {
			this.usage = value;
			return this;
		}

		dispose() {
			this.dispatchEvent({
				type: 'dispose'
			});
			return this;
		}

		copy(source) {
			this.name = source.name;
			this.usage = source.usage;
			const uniformsSource = source.uniforms;
			this.uniforms.length = 0;

			for (let i = 0, l = uniformsSource.length; i < l; i++) {
				this.uniforms.push(uniformsSource[i].clone());
			}

			return this;
		}

		clone() {
			return new this.constructor().copy(this);
		}

	}

	class InstancedInterleavedBuffer extends InterleavedBuffer {
		constructor(array, stride, meshPerAttribute = 1) {
			super(array, stride);
			this.isInstancedInterleavedBuffer = true;
			this.meshPerAttribute = meshPerAttribute;
		}

		copy(source) {
			super.copy(source);
			this.meshPerAttribute = source.meshPerAttribute;
			return this;
		}

		clone(data) {
			const ib = super.clone(data);
			ib.meshPerAttribute = this.meshPerAttribute;
			return ib;
		}

		toJSON(data) {
			const json = super.toJSON(data);
			json.isInstancedInterleavedBuffer = true;
			json.meshPerAttribute = this.meshPerAttribute;
			return json;
		}

	}

	class GLBufferAttribute {
		constructor(buffer, type, itemSize, elementSize, count) {
			this.isGLBufferAttribute = true;
			this.buffer = buffer;
			this.type = type;
			this.itemSize = itemSize;
			this.elementSize = elementSize;
			this.count = count;
			this.version = 0;
		}

		set needsUpdate(value) {
			if (value === true) this.version++;
		}

		setBuffer(buffer) {
			this.buffer = buffer;
			return this;
		}

		setType(type, elementSize) {
			this.type = type;
			this.elementSize = elementSize;
			return this;
		}

		setItemSize(itemSize) {
			this.itemSize = itemSize;
			return this;
		}

		setCount(count) {
			this.count = count;
			return this;
		}

	}

	class Raycaster {
		constructor(origin, direction, near = 0, far = Infinity) {
			this.ray = new Ray(origin, direction); // direction is assumed to be normalized (for accurate distance calculations)

			this.near = near;
			this.far = far;
			this.camera = null;
			this.layers = new Layers();
			this.params = {
				Mesh: {},
				Line: {
					threshold: 1
				},
				LOD: {},
				Points: {
					threshold: 1
				},
				Sprite: {}
			};
		}

		set(origin, direction) {
			// direction is assumed to be normalized (for accurate distance calculations)
			this.ray.set(origin, direction);
		}

		setFromCamera(coords, camera) {
			if (camera.isPerspectiveCamera) {
				this.ray.origin.setFromMatrixPosition(camera.matrixWorld);
				this.ray.direction.set(coords.x, coords.y, 0.5).unproject(camera).sub(this.ray.origin).normalize();
				this.camera = camera;
			} else if (camera.isOrthographicCamera) {
				this.ray.origin.set(coords.x, coords.y, (camera.near + camera.far) / (camera.near - camera.far)).unproject(camera); // set origin in plane of camera

				this.ray.direction.set(0, 0, -1).transformDirection(camera.matrixWorld);
				this.camera = camera;
			} else {
				console.error('THREE.Raycaster: Unsupported camera type: ' + camera.type);
			}
		}

		intersectObject(object, recursive = true, intersects = []) {
			intersectObject(object, this, intersects, recursive);
			intersects.sort(ascSort);
			return intersects;
		}

		intersectObjects(objects, recursive = true, intersects = []) {
			for (let i = 0, l = objects.length; i < l; i++) {
				intersectObject(objects[i], this, intersects, recursive);
			}

			intersects.sort(ascSort);
			return intersects;
		}

	}

	function ascSort(a, b) {
		return a.distance - b.distance;
	}

	function intersectObject(object, raycaster, intersects, recursive) {
		if (object.layers.test(raycaster.layers)) {
			object.raycast(raycaster, intersects);
		}

		if (recursive === true) {
			const children = object.children;

			for (let i = 0, l = children.length; i < l; i++) {
				intersectObject(children[i], raycaster, intersects, true);
			}
		}
	}

	/**
	 * Ref: https://en.wikipedia.org/wiki/Spherical_coordinate_system
	 *
	 * The polar angle (phi) is measured from the positive y-axis. The positive y-axis is up.
	 * The azimuthal angle (theta) is measured from the positive z-axis.
	 */

	class Spherical {
		constructor(radius = 1, phi = 0, theta = 0) {
			this.radius = radius;
			this.phi = phi; // polar angle

			this.theta = theta; // azimuthal angle

			return this;
		}

		set(radius, phi, theta) {
			this.radius = radius;
			this.phi = phi;
			this.theta = theta;
			return this;
		}

		copy(other) {
			this.radius = other.radius;
			this.phi = other.phi;
			this.theta = other.theta;
			return this;
		} // restrict phi to be between EPS and PI-EPS


		makeSafe() {
			const EPS = 0.000001;
			this.phi = Math.max(EPS, Math.min(Math.PI - EPS, this.phi));
			return this;
		}

		setFromVector3(v) {
			return this.setFromCartesianCoords(v.x, v.y, v.z);
		}

		setFromCartesianCoords(x, y, z) {
			this.radius = Math.sqrt(x * x + y * y + z * z);

			if (this.radius === 0) {
				this.theta = 0;
				this.phi = 0;
			} else {
				this.theta = Math.atan2(x, z);
				this.phi = Math.acos(clamp(y / this.radius, -1, 1));
			}

			return this;
		}

		clone() {
			return new this.constructor().copy(this);
		}

	}

	/**
	 * Ref: https://en.wikipedia.org/wiki/Cylindrical_coordinate_system
	 */
	class Cylindrical {
		constructor(radius = 1, theta = 0, y = 0) {
			this.radius = radius; // distance from the origin to a point in the x-z plane

			this.theta = theta; // counterclockwise angle in the x-z plane measured in radians from the positive z-axis

			this.y = y; // height above the x-z plane

			return this;
		}

		set(radius, theta, y) {
			this.radius = radius;
			this.theta = theta;
			this.y = y;
			return this;
		}

		copy(other) {
			this.radius = other.radius;
			this.theta = other.theta;
			this.y = other.y;
			return this;
		}

		setFromVector3(v) {
			return this.setFromCartesianCoords(v.x, v.y, v.z);
		}

		setFromCartesianCoords(x, y, z) {
			this.radius = Math.sqrt(x * x + z * z);
			this.theta = Math.atan2(x, z);
			this.y = y;
			return this;
		}

		clone() {
			return new this.constructor().copy(this);
		}

	}

	const _vector$4 = /*@__PURE__*/new Vector2();

	class Box2 {
		constructor(min = new Vector2(+Infinity, +Infinity), max = new Vector2(-Infinity, -Infinity)) {
			this.isBox2 = true;
			this.min = min;
			this.max = max;
		}

		set(min, max) {
			this.min.copy(min);
			this.max.copy(max);
			return this;
		}

		setFromPoints(points) {
			this.makeEmpty();

			for (let i = 0, il = points.length; i < il; i++) {
				this.expandByPoint(points[i]);
			}

			return this;
		}

		setFromCenterAndSize(center, size) {
			const halfSize = _vector$4.copy(size).multiplyScalar(0.5);

			this.min.copy(center).sub(halfSize);
			this.max.copy(center).add(halfSize);
			return this;
		}

		clone() {
			return new this.constructor().copy(this);
		}

		copy(box) {
			this.min.copy(box.min);
			this.max.copy(box.max);
			return this;
		}

		makeEmpty() {
			this.min.x = this.min.y = +Infinity;
			this.max.x = this.max.y = -Infinity;
			return this;
		}

		isEmpty() {
			// this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes
			return this.max.x < this.min.x || this.max.y < this.min.y;
		}

		getCenter(target) {
			return this.isEmpty() ? target.set(0, 0) : target.addVectors(this.min, this.max).multiplyScalar(0.5);
		}

		getSize(target) {
			return this.isEmpty() ? target.set(0, 0) : target.subVectors(this.max, this.min);
		}

		expandByPoint(point) {
			this.min.min(point);
			this.max.max(point);
			return this;
		}

		expandByVector(vector) {
			this.min.sub(vector);
			this.max.add(vector);
			return this;
		}

		expandByScalar(scalar) {
			this.min.addScalar(-scalar);
			this.max.addScalar(scalar);
			return this;
		}

		containsPoint(point) {
			return point.x < this.min.x || point.x > this.max.x || point.y < this.min.y || point.y > this.max.y ? false : true;
		}

		containsBox(box) {
			return this.min.x <= box.min.x && box.max.x <= this.max.x && this.min.y <= box.min.y && box.max.y <= this.max.y;
		}

		getParameter(point, target) {
			// This can potentially have a divide by zero if the box
			// has a size dimension of 0.
			return target.set((point.x - this.min.x) / (this.max.x - this.min.x), (point.y - this.min.y) / (this.max.y - this.min.y));
		}

		intersectsBox(box) {
			// using 4 splitting planes to rule out intersections
			return box.max.x < this.min.x || box.min.x > this.max.x || box.max.y < this.min.y || box.min.y > this.max.y ? false : true;
		}

		clampPoint(point, target) {
			return target.copy(point).clamp(this.min, this.max);
		}

		distanceToPoint(point) {
			const clampedPoint = _vector$4.copy(point).clamp(this.min, this.max);

			return clampedPoint.sub(point).length();
		}

		intersect(box) {
			this.min.max(box.min);
			this.max.min(box.max);
			return this;
		}

		union(box) {
			this.min.min(box.min);
			this.max.max(box.max);
			return this;
		}

		translate(offset) {
			this.min.add(offset);
			this.max.add(offset);
			return this;
		}

		equals(box) {
			return box.min.equals(this.min) && box.max.equals(this.max);
		}

	}

	const _startP = /*@__PURE__*/new Vector3();

	const _startEnd = /*@__PURE__*/new Vector3();

	class Line3 {
		constructor(start = new Vector3(), end = new Vector3()) {
			this.start = start;
			this.end = end;
		}

		set(start, end) {
			this.start.copy(start);
			this.end.copy(end);
			return this;
		}

		copy(line) {
			this.start.copy(line.start);
			this.end.copy(line.end);
			return this;
		}

		getCenter(target) {
			return target.addVectors(this.start, this.end).multiplyScalar(0.5);
		}

		delta(target) {
			return target.subVectors(this.end, this.start);
		}

		distanceSq() {
			return this.start.distanceToSquared(this.end);
		}

		distance() {
			return this.start.distanceTo(this.end);
		}

		at(t, target) {
			return this.delta(target).multiplyScalar(t).add(this.start);
		}

		closestPointToPointParameter(point, clampToLine) {
			_startP.subVectors(point, this.start);

			_startEnd.subVectors(this.end, this.start);

			const startEnd2 = _startEnd.dot(_startEnd);

			const startEnd_startP = _startEnd.dot(_startP);

			let t = startEnd_startP / startEnd2;

			if (clampToLine) {
				t = clamp(t, 0, 1);
			}

			return t;
		}

		closestPointToPoint(point, clampToLine, target) {
			const t = this.closestPointToPointParameter(point, clampToLine);
			return this.delta(target).multiplyScalar(t).add(this.start);
		}

		applyMatrix4(matrix) {
			this.start.applyMatrix4(matrix);
			this.end.applyMatrix4(matrix);
			return this;
		}

		equals(line) {
			return line.start.equals(this.start) && line.end.equals(this.end);
		}

		clone() {
			return new this.constructor().copy(this);
		}

	}

	const _vector$3 = /*@__PURE__*/new Vector3();

	class SpotLightHelper extends Object3D {
		constructor(light, color) {
			super();
			this.light = light;
			this.light.updateMatrixWorld();
			this.matrix = light.matrixWorld;
			this.matrixAutoUpdate = false;
			this.color = color;
			const geometry = new BufferGeometry();
			const positions = [0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, -1, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, -1, 1];

			for (let i = 0, j = 1, l = 32; i < l; i++, j++) {
				const p1 = i / l * Math.PI * 2;
				const p2 = j / l * Math.PI * 2;
				positions.push(Math.cos(p1), Math.sin(p1), 1, Math.cos(p2), Math.sin(p2), 1);
			}

			geometry.setAttribute('position', new Float32BufferAttribute(positions, 3));
			const material = new LineBasicMaterial({
				fog: false,
				toneMapped: false
			});
			this.cone = new LineSegments(geometry, material);
			this.add(this.cone);
			this.update();
		}

		dispose() {
			this.cone.geometry.dispose();
			this.cone.material.dispose();
		}

		update() {
			this.light.updateMatrixWorld();
			const coneLength = this.light.distance ? this.light.distance : 1000;
			const coneWidth = coneLength * Math.tan(this.light.angle);
			this.cone.scale.set(coneWidth, coneWidth, coneLength);

			_vector$3.setFromMatrixPosition(this.light.target.matrixWorld);

			this.cone.lookAt(_vector$3);

			if (this.color !== undefined) {
				this.cone.material.color.set(this.color);
			} else {
				this.cone.material.color.copy(this.light.color);
			}
		}

	}

	const _vector$2 = /*@__PURE__*/new Vector3();

	const _boneMatrix = /*@__PURE__*/new Matrix4();

	const _matrixWorldInv = /*@__PURE__*/new Matrix4();

	class SkeletonHelper extends LineSegments {
		constructor(object) {
			const bones = getBoneList(object);
			const geometry = new BufferGeometry();
			const vertices = [];
			const colors = [];
			const color1 = new Color(0, 0, 1);
			const color2 = new Color(0, 1, 0);

			for (let i = 0; i < bones.length; i++) {
				const bone = bones[i];

				if (bone.parent && bone.parent.isBone) {
					vertices.push(0, 0, 0);
					vertices.push(0, 0, 0);
					colors.push(color1.r, color1.g, color1.b);
					colors.push(color2.r, color2.g, color2.b);
				}
			}

			geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			geometry.setAttribute('color', new Float32BufferAttribute(colors, 3));
			const material = new LineBasicMaterial({
				vertexColors: true,
				depthTest: false,
				depthWrite: false,
				toneMapped: false,
				transparent: true
			});
			super(geometry, material);
			this.isSkeletonHelper = true;
			this.type = 'SkeletonHelper';
			this.root = object;
			this.bones = bones;
			this.matrix = object.matrixWorld;
			this.matrixAutoUpdate = false;
		}

		updateMatrixWorld(force) {
			const bones = this.bones;
			const geometry = this.geometry;
			const position = geometry.getAttribute('position');

			_matrixWorldInv.copy(this.root.matrixWorld).invert();

			for (let i = 0, j = 0; i < bones.length; i++) {
				const bone = bones[i];

				if (bone.parent && bone.parent.isBone) {
					_boneMatrix.multiplyMatrices(_matrixWorldInv, bone.matrixWorld);

					_vector$2.setFromMatrixPosition(_boneMatrix);

					position.setXYZ(j, _vector$2.x, _vector$2.y, _vector$2.z);

					_boneMatrix.multiplyMatrices(_matrixWorldInv, bone.parent.matrixWorld);

					_vector$2.setFromMatrixPosition(_boneMatrix);

					position.setXYZ(j + 1, _vector$2.x, _vector$2.y, _vector$2.z);
					j += 2;
				}
			}

			geometry.getAttribute('position').needsUpdate = true;
			super.updateMatrixWorld(force);
		}

	}

	function getBoneList(object) {
		const boneList = [];

		if (object.isBone === true) {
			boneList.push(object);
		}

		for (let i = 0; i < object.children.length; i++) {
			boneList.push.apply(boneList, getBoneList(object.children[i]));
		}

		return boneList;
	}

	class PointLightHelper extends Mesh {
		constructor(light, sphereSize, color) {
			const geometry = new SphereGeometry(sphereSize, 4, 2);
			const material = new MeshBasicMaterial({
				wireframe: true,
				fog: false,
				toneMapped: false
			});
			super(geometry, material);
			this.light = light;
			this.light.updateMatrixWorld();
			this.color = color;
			this.type = 'PointLightHelper';
			this.matrix = this.light.matrixWorld;
			this.matrixAutoUpdate = false;
			this.update();
			/*
			// TODO: delete this comment?
			const distanceGeometry = new THREE.IcosahedronGeometry( 1, 2 );
			const distanceMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false, wireframe: true, opacity: 0.1, transparent: true } );
			this.lightSphere = new THREE.Mesh( bulbGeometry, bulbMaterial );
			this.lightDistance = new THREE.Mesh( distanceGeometry, distanceMaterial );
			const d = light.distance;
			if ( d === 0.0 ) {
				this.lightDistance.visible = false;
			} else {
				this.lightDistance.scale.set( d, d, d );
			}
			this.add( this.lightDistance );
			*/
		}

		dispose() {
			this.geometry.dispose();
			this.material.dispose();
		}

		update() {
			if (this.color !== undefined) {
				this.material.color.set(this.color);
			} else {
				this.material.color.copy(this.light.color);
			}
			/*
			const d = this.light.distance;
				if ( d === 0.0 ) {
					this.lightDistance.visible = false;
				} else {
					this.lightDistance.visible = true;
				this.lightDistance.scale.set( d, d, d );
				}
			*/

		}

	}

	const _vector$1 = /*@__PURE__*/new Vector3();

	const _color1 = /*@__PURE__*/new Color();

	const _color2 = /*@__PURE__*/new Color();

	class HemisphereLightHelper extends Object3D {
		constructor(light, size, color) {
			super();
			this.light = light;
			this.light.updateMatrixWorld();
			this.matrix = light.matrixWorld;
			this.matrixAutoUpdate = false;
			this.color = color;
			const geometry = new OctahedronGeometry(size);
			geometry.rotateY(Math.PI * 0.5);
			this.material = new MeshBasicMaterial({
				wireframe: true,
				fog: false,
				toneMapped: false
			});
			if (this.color === undefined) this.material.vertexColors = true;
			const position = geometry.getAttribute('position');
			const colors = new Float32Array(position.count * 3);
			geometry.setAttribute('color', new BufferAttribute(colors, 3));
			this.add(new Mesh(geometry, this.material));
			this.update();
		}

		dispose() {
			this.children[0].geometry.dispose();
			this.children[0].material.dispose();
		}

		update() {
			const mesh = this.children[0];

			if (this.color !== undefined) {
				this.material.color.set(this.color);
			} else {
				const colors = mesh.geometry.getAttribute('color');

				_color1.copy(this.light.color);

				_color2.copy(this.light.groundColor);

				for (let i = 0, l = colors.count; i < l; i++) {
					const color = i < l / 2 ? _color1 : _color2;
					colors.setXYZ(i, color.r, color.g, color.b);
				}

				colors.needsUpdate = true;
			}

			mesh.lookAt(_vector$1.setFromMatrixPosition(this.light.matrixWorld).negate());
		}

	}

	class GridHelper extends LineSegments {
		constructor(size = 10, divisions = 10, color1 = 0x444444, color2 = 0x888888) {
			color1 = new Color(color1);
			color2 = new Color(color2);
			const center = divisions / 2;
			const step = size / divisions;
			const halfSize = size / 2;
			const vertices = [],
						colors = [];

			for (let i = 0, j = 0, k = -halfSize; i <= divisions; i++, k += step) {
				vertices.push(-halfSize, 0, k, halfSize, 0, k);
				vertices.push(k, 0, -halfSize, k, 0, halfSize);
				const color = i === center ? color1 : color2;
				color.toArray(colors, j);
				j += 3;
				color.toArray(colors, j);
				j += 3;
				color.toArray(colors, j);
				j += 3;
				color.toArray(colors, j);
				j += 3;
			}

			const geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			geometry.setAttribute('color', new Float32BufferAttribute(colors, 3));
			const material = new LineBasicMaterial({
				vertexColors: true,
				toneMapped: false
			});
			super(geometry, material);
			this.type = 'GridHelper';
		}

	}

	class PolarGridHelper extends LineSegments {
		constructor(radius = 10, radials = 16, circles = 8, divisions = 64, color1 = 0x444444, color2 = 0x888888) {
			color1 = new Color(color1);
			color2 = new Color(color2);
			const vertices = [];
			const colors = []; // create the radials

			for (let i = 0; i <= radials; i++) {
				const v = i / radials * (Math.PI * 2);
				const x = Math.sin(v) * radius;
				const z = Math.cos(v) * radius;
				vertices.push(0, 0, 0);
				vertices.push(x, 0, z);
				const color = i & 1 ? color1 : color2;
				colors.push(color.r, color.g, color.b);
				colors.push(color.r, color.g, color.b);
			} // create the circles


			for (let i = 0; i <= circles; i++) {
				const color = i & 1 ? color1 : color2;
				const r = radius - radius / circles * i;

				for (let j = 0; j < divisions; j++) {
					// first vertex
					let v = j / divisions * (Math.PI * 2);
					let x = Math.sin(v) * r;
					let z = Math.cos(v) * r;
					vertices.push(x, 0, z);
					colors.push(color.r, color.g, color.b); // second vertex

					v = (j + 1) / divisions * (Math.PI * 2);
					x = Math.sin(v) * r;
					z = Math.cos(v) * r;
					vertices.push(x, 0, z);
					colors.push(color.r, color.g, color.b);
				}
			}

			const geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			geometry.setAttribute('color', new Float32BufferAttribute(colors, 3));
			const material = new LineBasicMaterial({
				vertexColors: true,
				toneMapped: false
			});
			super(geometry, material);
			this.type = 'PolarGridHelper';
		}

	}

	const _v1 = /*@__PURE__*/new Vector3();

	const _v2 = /*@__PURE__*/new Vector3();

	const _v3 = /*@__PURE__*/new Vector3();

	class DirectionalLightHelper extends Object3D {
		constructor(light, size, color) {
			super();
			this.light = light;
			this.light.updateMatrixWorld();
			this.matrix = light.matrixWorld;
			this.matrixAutoUpdate = false;
			this.color = color;
			if (size === undefined) size = 1;
			let geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute([-size, size, 0, size, size, 0, size, -size, 0, -size, -size, 0, -size, size, 0], 3));
			const material = new LineBasicMaterial({
				fog: false,
				toneMapped: false
			});
			this.lightPlane = new Line(geometry, material);
			this.add(this.lightPlane);
			geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute([0, 0, 0, 0, 0, 1], 3));
			this.targetLine = new Line(geometry, material);
			this.add(this.targetLine);
			this.update();
		}

		dispose() {
			this.lightPlane.geometry.dispose();
			this.lightPlane.material.dispose();
			this.targetLine.geometry.dispose();
			this.targetLine.material.dispose();
		}

		update() {
			_v1.setFromMatrixPosition(this.light.matrixWorld);

			_v2.setFromMatrixPosition(this.light.target.matrixWorld);

			_v3.subVectors(_v2, _v1);

			this.lightPlane.lookAt(_v2);

			if (this.color !== undefined) {
				this.lightPlane.material.color.set(this.color);
				this.targetLine.material.color.set(this.color);
			} else {
				this.lightPlane.material.color.copy(this.light.color);
				this.targetLine.material.color.copy(this.light.color);
			}

			this.targetLine.lookAt(_v2);
			this.targetLine.scale.z = _v3.length();
		}

	}

	const _vector = /*@__PURE__*/new Vector3();

	const _camera = /*@__PURE__*/new Camera();
	/**
	 *	- shows frustum, line of sight and up of the camera
	 *	- suitable for fast updates
	 * 	- based on frustum visualization in lightgl.js shadowmap example
	 *		https://github.com/evanw/lightgl.js/blob/master/tests/shadowmap.html
	 */


	class CameraHelper extends LineSegments {
		constructor(camera) {
			const geometry = new BufferGeometry();
			const material = new LineBasicMaterial({
				color: 0xffffff,
				vertexColors: true,
				toneMapped: false
			});
			const vertices = [];
			const colors = [];
			const pointMap = {}; // near

			addLine('n1', 'n2');
			addLine('n2', 'n4');
			addLine('n4', 'n3');
			addLine('n3', 'n1'); // far

			addLine('f1', 'f2');
			addLine('f2', 'f4');
			addLine('f4', 'f3');
			addLine('f3', 'f1'); // sides

			addLine('n1', 'f1');
			addLine('n2', 'f2');
			addLine('n3', 'f3');
			addLine('n4', 'f4'); // cone

			addLine('p', 'n1');
			addLine('p', 'n2');
			addLine('p', 'n3');
			addLine('p', 'n4'); // up

			addLine('u1', 'u2');
			addLine('u2', 'u3');
			addLine('u3', 'u1'); // target

			addLine('c', 't');
			addLine('p', 'c'); // cross

			addLine('cn1', 'cn2');
			addLine('cn3', 'cn4');
			addLine('cf1', 'cf2');
			addLine('cf3', 'cf4');

			function addLine(a, b) {
				addPoint(a);
				addPoint(b);
			}

			function addPoint(id) {
				vertices.push(0, 0, 0);
				colors.push(0, 0, 0);

				if (pointMap[id] === undefined) {
					pointMap[id] = [];
				}

				pointMap[id].push(vertices.length / 3 - 1);
			}

			geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			geometry.setAttribute('color', new Float32BufferAttribute(colors, 3));
			super(geometry, material);
			this.type = 'CameraHelper';
			this.camera = camera;
			if (this.camera.updateProjectionMatrix) this.camera.updateProjectionMatrix();
			this.matrix = camera.matrixWorld;
			this.matrixAutoUpdate = false;
			this.pointMap = pointMap;
			this.update(); // colors

			const colorFrustum = new Color(0xffaa00);
			const colorCone = new Color(0xff0000);
			const colorUp = new Color(0x00aaff);
			const colorTarget = new Color(0xffffff);
			const colorCross = new Color(0x333333);
			this.setColors(colorFrustum, colorCone, colorUp, colorTarget, colorCross);
		}

		setColors(frustum, cone, up, target, cross) {
			const geometry = this.geometry;
			const colorAttribute = geometry.getAttribute('color'); // near

			colorAttribute.setXYZ(0, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(1, frustum.r, frustum.g, frustum.b); // n1, n2

			colorAttribute.setXYZ(2, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(3, frustum.r, frustum.g, frustum.b); // n2, n4

			colorAttribute.setXYZ(4, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(5, frustum.r, frustum.g, frustum.b); // n4, n3

			colorAttribute.setXYZ(6, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(7, frustum.r, frustum.g, frustum.b); // n3, n1
			// far

			colorAttribute.setXYZ(8, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(9, frustum.r, frustum.g, frustum.b); // f1, f2

			colorAttribute.setXYZ(10, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(11, frustum.r, frustum.g, frustum.b); // f2, f4

			colorAttribute.setXYZ(12, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(13, frustum.r, frustum.g, frustum.b); // f4, f3

			colorAttribute.setXYZ(14, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(15, frustum.r, frustum.g, frustum.b); // f3, f1
			// sides

			colorAttribute.setXYZ(16, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(17, frustum.r, frustum.g, frustum.b); // n1, f1

			colorAttribute.setXYZ(18, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(19, frustum.r, frustum.g, frustum.b); // n2, f2

			colorAttribute.setXYZ(20, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(21, frustum.r, frustum.g, frustum.b); // n3, f3

			colorAttribute.setXYZ(22, frustum.r, frustum.g, frustum.b);
			colorAttribute.setXYZ(23, frustum.r, frustum.g, frustum.b); // n4, f4
			// cone

			colorAttribute.setXYZ(24, cone.r, cone.g, cone.b);
			colorAttribute.setXYZ(25, cone.r, cone.g, cone.b); // p, n1

			colorAttribute.setXYZ(26, cone.r, cone.g, cone.b);
			colorAttribute.setXYZ(27, cone.r, cone.g, cone.b); // p, n2

			colorAttribute.setXYZ(28, cone.r, cone.g, cone.b);
			colorAttribute.setXYZ(29, cone.r, cone.g, cone.b); // p, n3

			colorAttribute.setXYZ(30, cone.r, cone.g, cone.b);
			colorAttribute.setXYZ(31, cone.r, cone.g, cone.b); // p, n4
			// up

			colorAttribute.setXYZ(32, up.r, up.g, up.b);
			colorAttribute.setXYZ(33, up.r, up.g, up.b); // u1, u2

			colorAttribute.setXYZ(34, up.r, up.g, up.b);
			colorAttribute.setXYZ(35, up.r, up.g, up.b); // u2, u3

			colorAttribute.setXYZ(36, up.r, up.g, up.b);
			colorAttribute.setXYZ(37, up.r, up.g, up.b); // u3, u1
			// target

			colorAttribute.setXYZ(38, target.r, target.g, target.b);
			colorAttribute.setXYZ(39, target.r, target.g, target.b); // c, t

			colorAttribute.setXYZ(40, cross.r, cross.g, cross.b);
			colorAttribute.setXYZ(41, cross.r, cross.g, cross.b); // p, c
			// cross

			colorAttribute.setXYZ(42, cross.r, cross.g, cross.b);
			colorAttribute.setXYZ(43, cross.r, cross.g, cross.b); // cn1, cn2

			colorAttribute.setXYZ(44, cross.r, cross.g, cross.b);
			colorAttribute.setXYZ(45, cross.r, cross.g, cross.b); // cn3, cn4

			colorAttribute.setXYZ(46, cross.r, cross.g, cross.b);
			colorAttribute.setXYZ(47, cross.r, cross.g, cross.b); // cf1, cf2

			colorAttribute.setXYZ(48, cross.r, cross.g, cross.b);
			colorAttribute.setXYZ(49, cross.r, cross.g, cross.b); // cf3, cf4

			colorAttribute.needsUpdate = true;
		}

		update() {
			const geometry = this.geometry;
			const pointMap = this.pointMap;
			const w = 1,
						h = 1; // we need just camera projection matrix inverse
			// world matrix must be identity

			_camera.projectionMatrixInverse.copy(this.camera.projectionMatrixInverse); // center / target


			setPoint('c', pointMap, geometry, _camera, 0, 0, -1);
			setPoint('t', pointMap, geometry, _camera, 0, 0, 1); // near

			setPoint('n1', pointMap, geometry, _camera, -w, -h, -1);
			setPoint('n2', pointMap, geometry, _camera, w, -h, -1);
			setPoint('n3', pointMap, geometry, _camera, -w, h, -1);
			setPoint('n4', pointMap, geometry, _camera, w, h, -1); // far

			setPoint('f1', pointMap, geometry, _camera, -w, -h, 1);
			setPoint('f2', pointMap, geometry, _camera, w, -h, 1);
			setPoint('f3', pointMap, geometry, _camera, -w, h, 1);
			setPoint('f4', pointMap, geometry, _camera, w, h, 1); // up

			setPoint('u1', pointMap, geometry, _camera, w * 0.7, h * 1.1, -1);
			setPoint('u2', pointMap, geometry, _camera, -w * 0.7, h * 1.1, -1);
			setPoint('u3', pointMap, geometry, _camera, 0, h * 2, -1); // cross

			setPoint('cf1', pointMap, geometry, _camera, -w, 0, 1);
			setPoint('cf2', pointMap, geometry, _camera, w, 0, 1);
			setPoint('cf3', pointMap, geometry, _camera, 0, -h, 1);
			setPoint('cf4', pointMap, geometry, _camera, 0, h, 1);
			setPoint('cn1', pointMap, geometry, _camera, -w, 0, -1);
			setPoint('cn2', pointMap, geometry, _camera, w, 0, -1);
			setPoint('cn3', pointMap, geometry, _camera, 0, -h, -1);
			setPoint('cn4', pointMap, geometry, _camera, 0, h, -1);
			geometry.getAttribute('position').needsUpdate = true;
		}

		dispose() {
			this.geometry.dispose();
			this.material.dispose();
		}

	}

	function setPoint(point, pointMap, geometry, camera, x, y, z) {
		_vector.set(x, y, z).unproject(camera);

		const points = pointMap[point];

		if (points !== undefined) {
			const position = geometry.getAttribute('position');

			for (let i = 0, l = points.length; i < l; i++) {
				position.setXYZ(points[i], _vector.x, _vector.y, _vector.z);
			}
		}
	}

	const _box = /*@__PURE__*/new Box3();

	class BoxHelper extends LineSegments {
		constructor(object, color = 0xffff00) {
			const indices = new Uint16Array([0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7]);
			const positions = new Float32Array(8 * 3);
			const geometry = new BufferGeometry();
			geometry.setIndex(new BufferAttribute(indices, 1));
			geometry.setAttribute('position', new BufferAttribute(positions, 3));
			super(geometry, new LineBasicMaterial({
				color: color,
				toneMapped: false
			}));
			this.object = object;
			this.type = 'BoxHelper';
			this.matrixAutoUpdate = false;
			this.update();
		}

		update(object) {
			if (object !== undefined) {
				console.warn('THREE.BoxHelper: .update() has no longer arguments.');
			}

			if (this.object !== undefined) {
				_box.setFromObject(this.object);
			}

			if (_box.isEmpty()) return;
			const min = _box.min;
			const max = _box.max;
			/*
				5____4
			1/___0/|
			| 6__|_7
			2/___3/
				0: max.x, max.y, max.z
			1: min.x, max.y, max.z
			2: min.x, min.y, max.z
			3: max.x, min.y, max.z
			4: max.x, max.y, min.z
			5: min.x, max.y, min.z
			6: min.x, min.y, min.z
			7: max.x, min.y, min.z
			*/

			const position = this.geometry.attributes.position;
			const array = position.array;
			array[0] = max.x;
			array[1] = max.y;
			array[2] = max.z;
			array[3] = min.x;
			array[4] = max.y;
			array[5] = max.z;
			array[6] = min.x;
			array[7] = min.y;
			array[8] = max.z;
			array[9] = max.x;
			array[10] = min.y;
			array[11] = max.z;
			array[12] = max.x;
			array[13] = max.y;
			array[14] = min.z;
			array[15] = min.x;
			array[16] = max.y;
			array[17] = min.z;
			array[18] = min.x;
			array[19] = min.y;
			array[20] = min.z;
			array[21] = max.x;
			array[22] = min.y;
			array[23] = min.z;
			position.needsUpdate = true;
			this.geometry.computeBoundingSphere();
		}

		setFromObject(object) {
			this.object = object;
			this.update();
			return this;
		}

		copy(source, recursive) {
			super.copy(source, recursive);
			this.object = source.object;
			return this;
		}

	}

	class Box3Helper extends LineSegments {
		constructor(box, color = 0xffff00) {
			const indices = new Uint16Array([0, 1, 1, 2, 2, 3, 3, 0, 4, 5, 5, 6, 6, 7, 7, 4, 0, 4, 1, 5, 2, 6, 3, 7]);
			const positions = [1, 1, 1, -1, 1, 1, -1, -1, 1, 1, -1, 1, 1, 1, -1, -1, 1, -1, -1, -1, -1, 1, -1, -1];
			const geometry = new BufferGeometry();
			geometry.setIndex(new BufferAttribute(indices, 1));
			geometry.setAttribute('position', new Float32BufferAttribute(positions, 3));
			super(geometry, new LineBasicMaterial({
				color: color,
				toneMapped: false
			}));
			this.box = box;
			this.type = 'Box3Helper';
			this.geometry.computeBoundingSphere();
		}

		updateMatrixWorld(force) {
			const box = this.box;
			if (box.isEmpty()) return;
			box.getCenter(this.position);
			box.getSize(this.scale);
			this.scale.multiplyScalar(0.5);
			super.updateMatrixWorld(force);
		}

	}

	class PlaneHelper extends Line {
		constructor(plane, size = 1, hex = 0xffff00) {
			const color = hex;
			const positions = [1, -1, 0, -1, 1, 0, -1, -1, 0, 1, 1, 0, -1, 1, 0, -1, -1, 0, 1, -1, 0, 1, 1, 0];
			const geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute(positions, 3));
			geometry.computeBoundingSphere();
			super(geometry, new LineBasicMaterial({
				color: color,
				toneMapped: false
			}));
			this.type = 'PlaneHelper';
			this.plane = plane;
			this.size = size;
			const positions2 = [1, 1, 0, -1, 1, 0, -1, -1, 0, 1, 1, 0, -1, -1, 0, 1, -1, 0];
			const geometry2 = new BufferGeometry();
			geometry2.setAttribute('position', new Float32BufferAttribute(positions2, 3));
			geometry2.computeBoundingSphere();
			this.add(new Mesh(geometry2, new MeshBasicMaterial({
				color: color,
				opacity: 0.2,
				transparent: true,
				depthWrite: false,
				toneMapped: false
			})));
		}

		updateMatrixWorld(force) {
			this.position.set(0, 0, 0);
			this.scale.set(0.5 * this.size, 0.5 * this.size, 1);
			this.lookAt(this.plane.normal);
			this.translateZ(-this.plane.constant);
			super.updateMatrixWorld(force);
		}

	}

	const _axis = /*@__PURE__*/new Vector3();

	let _lineGeometry, _coneGeometry;

	class ArrowHelper extends Object3D {
		// dir is assumed to be normalized
		constructor(dir = new Vector3(0, 0, 1), origin = new Vector3(0, 0, 0), length = 1, color = 0xffff00, headLength = length * 0.2, headWidth = headLength * 0.2) {
			super();
			this.type = 'ArrowHelper';

			if (_lineGeometry === undefined) {
				_lineGeometry = new BufferGeometry();

				_lineGeometry.setAttribute('position', new Float32BufferAttribute([0, 0, 0, 0, 1, 0], 3));

				_coneGeometry = new CylinderGeometry(0, 0.5, 1, 5, 1);

				_coneGeometry.translate(0, -0.5, 0);
			}

			this.position.copy(origin);
			this.line = new Line(_lineGeometry, new LineBasicMaterial({
				color: color,
				toneMapped: false
			}));
			this.line.matrixAutoUpdate = false;
			this.add(this.line);
			this.cone = new Mesh(_coneGeometry, new MeshBasicMaterial({
				color: color,
				toneMapped: false
			}));
			this.cone.matrixAutoUpdate = false;
			this.add(this.cone);
			this.setDirection(dir);
			this.setLength(length, headLength, headWidth);
		}

		setDirection(dir) {
			// dir is assumed to be normalized
			if (dir.y > 0.99999) {
				this.quaternion.set(0, 0, 0, 1);
			} else if (dir.y < -0.99999) {
				this.quaternion.set(1, 0, 0, 0);
			} else {
				_axis.set(dir.z, 0, -dir.x).normalize();

				const radians = Math.acos(dir.y);
				this.quaternion.setFromAxisAngle(_axis, radians);
			}
		}

		setLength(length, headLength = length * 0.2, headWidth = headLength * 0.2) {
			this.line.scale.set(1, Math.max(0.0001, length - headLength), 1); // see #17458

			this.line.updateMatrix();
			this.cone.scale.set(headWidth, headLength, headWidth);
			this.cone.position.y = length;
			this.cone.updateMatrix();
		}

		setColor(color) {
			this.line.material.color.set(color);
			this.cone.material.color.set(color);
		}

		copy(source) {
			super.copy(source, false);
			this.line.copy(source.line);
			this.cone.copy(source.cone);
			return this;
		}

	}

	class AxesHelper extends LineSegments {
		constructor(size = 1) {
			const vertices = [0, 0, 0, size, 0, 0, 0, 0, 0, 0, size, 0, 0, 0, 0, 0, 0, size];
			const colors = [1, 0, 0, 1, 0.6, 0, 0, 1, 0, 0.6, 1, 0, 0, 0, 1, 0, 0.6, 1];
			const geometry = new BufferGeometry();
			geometry.setAttribute('position', new Float32BufferAttribute(vertices, 3));
			geometry.setAttribute('color', new Float32BufferAttribute(colors, 3));
			const material = new LineBasicMaterial({
				vertexColors: true,
				toneMapped: false
			});
			super(geometry, material);
			this.type = 'AxesHelper';
		}

		setColors(xAxisColor, yAxisColor, zAxisColor) {
			const color = new Color();
			const array = this.geometry.attributes.color.array;
			color.set(xAxisColor);
			color.toArray(array, 0);
			color.toArray(array, 3);
			color.set(yAxisColor);
			color.toArray(array, 6);
			color.toArray(array, 9);
			color.set(zAxisColor);
			color.toArray(array, 12);
			color.toArray(array, 15);
			this.geometry.attributes.color.needsUpdate = true;
			return this;
		}

		dispose() {
			this.geometry.dispose();
			this.material.dispose();
		}

	}

	class ShapePath {
		constructor() {
			this.type = 'ShapePath';
			this.color = new Color();
			this.subPaths = [];
			this.currentPath = null;
		}

		moveTo(x, y) {
			this.currentPath = new Path();
			this.subPaths.push(this.currentPath);
			this.currentPath.moveTo(x, y);
			return this;
		}

		lineTo(x, y) {
			this.currentPath.lineTo(x, y);
			return this;
		}

		quadraticCurveTo(aCPx, aCPy, aX, aY) {
			this.currentPath.quadraticCurveTo(aCPx, aCPy, aX, aY);
			return this;
		}

		bezierCurveTo(aCP1x, aCP1y, aCP2x, aCP2y, aX, aY) {
			this.currentPath.bezierCurveTo(aCP1x, aCP1y, aCP2x, aCP2y, aX, aY);
			return this;
		}

		splineThru(pts) {
			this.currentPath.splineThru(pts);
			return this;
		}

		toShapes(isCCW, noHoles) {
			function toShapesNoHoles(inSubpaths) {
				const shapes = [];

				for (let i = 0, l = inSubpaths.length; i < l; i++) {
					const tmpPath = inSubpaths[i];
					const tmpShape = new Shape();
					tmpShape.curves = tmpPath.curves;
					shapes.push(tmpShape);
				}

				return shapes;
			}

			function isPointInsidePolygon(inPt, inPolygon) {
				const polyLen = inPolygon.length; // inPt on polygon contour => immediate success		or
				// toggling of inside/outside at every single! intersection point of an edge
				//	with the horizontal line through inPt, left of inPt
				//	not counting lowerY endpoints of edges and whole edges on that line

				let inside = false;

				for (let p = polyLen - 1, q = 0; q < polyLen; p = q++) {
					let edgeLowPt = inPolygon[p];
					let edgeHighPt = inPolygon[q];
					let edgeDx = edgeHighPt.x - edgeLowPt.x;
					let edgeDy = edgeHighPt.y - edgeLowPt.y;

					if (Math.abs(edgeDy) > Number.EPSILON) {
						// not parallel
						if (edgeDy < 0) {
							edgeLowPt = inPolygon[q];
							edgeDx = -edgeDx;
							edgeHighPt = inPolygon[p];
							edgeDy = -edgeDy;
						}

						if (inPt.y < edgeLowPt.y || inPt.y > edgeHighPt.y) continue;

						if (inPt.y === edgeLowPt.y) {
							if (inPt.x === edgeLowPt.x) return true; // inPt is on contour ?
							// continue;				// no intersection or edgeLowPt => doesn't count !!!
						} else {
							const perpEdge = edgeDy * (inPt.x - edgeLowPt.x) - edgeDx * (inPt.y - edgeLowPt.y);
							if (perpEdge === 0) return true; // inPt is on contour ?

							if (perpEdge < 0) continue;
							inside = !inside; // true intersection left of inPt
						}
					} else {
						// parallel or collinear
						if (inPt.y !== edgeLowPt.y) continue; // parallel
						// edge lies on the same horizontal line as inPt

						if (edgeHighPt.x <= inPt.x && inPt.x <= edgeLowPt.x || edgeLowPt.x <= inPt.x && inPt.x <= edgeHighPt.x) return true; // inPt: Point on contour !
						// continue;
					}
				}

				return inside;
			}

			const isClockWise = ShapeUtils.isClockWise;
			const subPaths = this.subPaths;
			if (subPaths.length === 0) return [];
			if (noHoles === true) return toShapesNoHoles(subPaths);
			let solid, tmpPath, tmpShape;
			const shapes = [];

			if (subPaths.length === 1) {
				tmpPath = subPaths[0];
				tmpShape = new Shape();
				tmpShape.curves = tmpPath.curves;
				shapes.push(tmpShape);
				return shapes;
			}

			let holesFirst = !isClockWise(subPaths[0].getPoints());
			holesFirst = isCCW ? !holesFirst : holesFirst; // console.log("Holes first", holesFirst);

			const betterShapeHoles = [];
			const newShapes = [];
			let newShapeHoles = [];
			let mainIdx = 0;
			let tmpPoints;
			newShapes[mainIdx] = undefined;
			newShapeHoles[mainIdx] = [];

			for (let i = 0, l = subPaths.length; i < l; i++) {
				tmpPath = subPaths[i];
				tmpPoints = tmpPath.getPoints();
				solid = isClockWise(tmpPoints);
				solid = isCCW ? !solid : solid;

				if (solid) {
					if (!holesFirst && newShapes[mainIdx]) mainIdx++;
					newShapes[mainIdx] = {
						s: new Shape(),
						p: tmpPoints
					};
					newShapes[mainIdx].s.curves = tmpPath.curves;
					if (holesFirst) mainIdx++;
					newShapeHoles[mainIdx] = []; //console.log('cw', i);
				} else {
					newShapeHoles[mainIdx].push({
						h: tmpPath,
						p: tmpPoints[0]
					}); //console.log('ccw', i);
				}
			} // only Holes? -> probably all Shapes with wrong orientation


			if (!newShapes[0]) return toShapesNoHoles(subPaths);

			if (newShapes.length > 1) {
				let ambiguous = false;
				let toChange = 0;

				for (let sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx++) {
					betterShapeHoles[sIdx] = [];
				}

				for (let sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx++) {
					const sho = newShapeHoles[sIdx];

					for (let hIdx = 0; hIdx < sho.length; hIdx++) {
						const ho = sho[hIdx];
						let hole_unassigned = true;

						for (let s2Idx = 0; s2Idx < newShapes.length; s2Idx++) {
							if (isPointInsidePolygon(ho.p, newShapes[s2Idx].p)) {
								if (sIdx !== s2Idx) toChange++;

								if (hole_unassigned) {
									hole_unassigned = false;
									betterShapeHoles[s2Idx].push(ho);
								} else {
									ambiguous = true;
								}
							}
						}

						if (hole_unassigned) {
							betterShapeHoles[sIdx].push(ho);
						}
					}
				}

				if (toChange > 0 && ambiguous === false) {
					newShapeHoles = betterShapeHoles;
				}
			}

			let tmpHoles;

			for (let i = 0, il = newShapes.length; i < il; i++) {
				tmpShape = newShapes[i].s;
				shapes.push(tmpShape);
				tmpHoles = newShapeHoles[i];

				for (let j = 0, jl = tmpHoles.length; j < jl; j++) {
					tmpShape.holes.push(tmpHoles[j].h);
				}
			} //console.log("shape", shapes);


			return shapes;
		}

	}

	const _tables = /*@__PURE__*/_generateTables();

	function _generateTables() {
		// float32 to float16 helpers
		const buffer = new ArrayBuffer(4);
		const floatView = new Float32Array(buffer);
		const uint32View = new Uint32Array(buffer);
		const baseTable = new Uint32Array(512);
		const shiftTable = new Uint32Array(512);

		for (let i = 0; i < 256; ++i) {
			const e = i - 127; // very small number (0, -0)

			if (e < -27) {
				baseTable[i] = 0x0000;
				baseTable[i | 0x100] = 0x8000;
				shiftTable[i] = 24;
				shiftTable[i | 0x100] = 24; // small number (denorm)
			} else if (e < -14) {
				baseTable[i] = 0x0400 >> -e - 14;
				baseTable[i | 0x100] = 0x0400 >> -e - 14 | 0x8000;
				shiftTable[i] = -e - 1;
				shiftTable[i | 0x100] = -e - 1; // normal number
			} else if (e <= 15) {
				baseTable[i] = e + 15 << 10;
				baseTable[i | 0x100] = e + 15 << 10 | 0x8000;
				shiftTable[i] = 13;
				shiftTable[i | 0x100] = 13; // large number (Infinity, -Infinity)
			} else if (e < 128) {
				baseTable[i] = 0x7c00;
				baseTable[i | 0x100] = 0xfc00;
				shiftTable[i] = 24;
				shiftTable[i | 0x100] = 24; // stay (NaN, Infinity, -Infinity)
			} else {
				baseTable[i] = 0x7c00;
				baseTable[i | 0x100] = 0xfc00;
				shiftTable[i] = 13;
				shiftTable[i | 0x100] = 13;
			}
		} // float16 to float32 helpers


		const mantissaTable = new Uint32Array(2048);
		const exponentTable = new Uint32Array(64);
		const offsetTable = new Uint32Array(64);

		for (let i = 1; i < 1024; ++i) {
			let m = i << 13; // zero pad mantissa bits

			let e = 0; // zero exponent
			// normalized

			while ((m & 0x00800000) === 0) {
				m <<= 1;
				e -= 0x00800000; // decrement exponent
			}

			m &= ~0x00800000; // clear leading 1 bit

			e += 0x38800000; // adjust bias

			mantissaTable[i] = m | e;
		}

		for (let i = 1024; i < 2048; ++i) {
			mantissaTable[i] = 0x38000000 + (i - 1024 << 13);
		}

		for (let i = 1; i < 31; ++i) {
			exponentTable[i] = i << 23;
		}

		exponentTable[31] = 0x47800000;
		exponentTable[32] = 0x80000000;

		for (let i = 33; i < 63; ++i) {
			exponentTable[i] = 0x80000000 + (i - 32 << 23);
		}

		exponentTable[63] = 0xc7800000;

		for (let i = 1; i < 64; ++i) {
			if (i !== 32) {
				offsetTable[i] = 1024;
			}
		}

		return {
			floatView: floatView,
			uint32View: uint32View,
			baseTable: baseTable,
			shiftTable: shiftTable,
			mantissaTable: mantissaTable,
			exponentTable: exponentTable,
			offsetTable: offsetTable
		};
	} // float32 to float16


	function toHalfFloat(val) {
		if (Math.abs(val) > 65504) console.warn('THREE.DataUtils.toHalfFloat(): Value out of range.');
		val = clamp(val, -65504, 65504);
		_tables.floatView[0] = val;
		const f = _tables.uint32View[0];
		const e = f >> 23 & 0x1ff;
		return _tables.baseTable[e] + ((f & 0x007fffff) >> _tables.shiftTable[e]);
	} // float16 to float32


	function fromHalfFloat(val) {
		const m = val >> 10;
		_tables.uint32View[0] = _tables.mantissaTable[_tables.offsetTable[m] + (val & 0x3ff)] + _tables.exponentTable[m];
		return _tables.floatView[0];
	}

	var DataUtils = /*#__PURE__*/Object.freeze({
		__proto__: null,
		toHalfFloat: toHalfFloat,
		fromHalfFloat: fromHalfFloat
	});

	class ParametricGeometry extends BufferGeometry {
		constructor() {
			console.error('THREE.ParametricGeometry has been moved to /examples/jsm/geometries/ParametricGeometry.js');
			super();
		}

	} // r133, eb58ff153119090d3bbb24474ea0ffc40c70dc92

	class TextGeometry extends BufferGeometry {
		constructor() {
			console.error('THREE.TextGeometry has been moved to /examples/jsm/geometries/TextGeometry.js');
			super();
		}

	} // r133, eb58ff153119090d3bbb24474ea0ffc40c70dc92

	function FontLoader() {
		console.error('THREE.FontLoader has been moved to /examples/jsm/loaders/FontLoader.js');
	} // r133, eb58ff153119090d3bbb24474ea0ffc40c70dc92

	function Font() {
		console.error('THREE.Font has been moved to /examples/jsm/loaders/FontLoader.js');
	} // r134, d65e0af06644fe5a84a6fc0e372f4318f95a04c0

	function ImmediateRenderObject() {
		console.error('THREE.ImmediateRenderObject has been removed.');
	} // r138, 48b05d3500acc084df50be9b4c90781ad9b8cb17

	class WebGLMultisampleRenderTarget extends WebGLRenderTarget {
		constructor(width, height, options) {
			console.error('THREE.WebGLMultisampleRenderTarget has been removed. Use a normal render target and set the "samples" property to greater 0 to enable multisampling.');
			super(width, height, options);
			this.samples = 4;
		}

	} // r138, f9cd9cab03b7b64244e304900a3a2eeaa3a588ce

	class DataTexture2DArray extends DataArrayTexture {
		constructor(data, width, height, depth) {
			console.warn('THREE.DataTexture2DArray has been renamed to DataArrayTexture.');
			super(data, width, height, depth);
		}

	} // r138, f9cd9cab03b7b64244e304900a3a2eeaa3a588ce

	class DataTexture3D extends Data3DTexture {
		constructor(data, width, height, depth) {
			console.warn('THREE.DataTexture3D has been renamed to Data3DTexture.');
			super(data, width, height, depth);
		}

	}

	if (typeof __THREE_DEVTOOLS__ !== 'undefined') {
		__THREE_DEVTOOLS__.dispatchEvent(new CustomEvent('register', {
			detail: {
				revision: REVISION
			}
		}));
	}

	if (typeof window !== 'undefined') {
		if (window.__THREE__) {
			console.warn('WARNING: Multiple instances of Three.js being imported.');
		} else {
			window.__THREE__ = REVISION;
		}
	}

	exports.ACESFilmicToneMapping = ACESFilmicToneMapping;
	exports.AddEquation = AddEquation;
	exports.AddOperation = AddOperation;
	exports.AdditiveAnimationBlendMode = AdditiveAnimationBlendMode;
	exports.AdditiveBlending = AdditiveBlending;
	exports.AlphaFormat = AlphaFormat;
	exports.AlwaysDepth = AlwaysDepth;
	exports.AlwaysStencilFunc = AlwaysStencilFunc;
	exports.AmbientLight = AmbientLight;
	exports.AmbientLightProbe = AmbientLightProbe;
	exports.AnimationClip = AnimationClip;
	exports.AnimationLoader = AnimationLoader;
	exports.AnimationMixer = AnimationMixer;
	exports.AnimationObjectGroup = AnimationObjectGroup;
	exports.AnimationUtils = AnimationUtils;
	exports.ArcCurve = ArcCurve;
	exports.ArrayCamera = ArrayCamera;
	exports.ArrowHelper = ArrowHelper;
	exports.Audio = Audio;
	exports.AudioAnalyser = AudioAnalyser;
	exports.AudioContext = AudioContext;
	exports.AudioListener = AudioListener;
	exports.AudioLoader = AudioLoader;
	exports.AxesHelper = AxesHelper;
	exports.BackSide = BackSide;
	exports.BasicDepthPacking = BasicDepthPacking;
	exports.BasicShadowMap = BasicShadowMap;
	exports.Bone = Bone;
	exports.BooleanKeyframeTrack = BooleanKeyframeTrack;
	exports.Box2 = Box2;
	exports.Box3 = Box3;
	exports.Box3Helper = Box3Helper;
	exports.BoxBufferGeometry = BoxGeometry;
	exports.BoxGeometry = BoxGeometry;
	exports.BoxHelper = BoxHelper;
	exports.BufferAttribute = BufferAttribute;
	exports.BufferGeometry = BufferGeometry;
	exports.BufferGeometryLoader = BufferGeometryLoader;
	exports.ByteType = ByteType;
	exports.Cache = Cache;
	exports.Camera = Camera;
	exports.CameraHelper = CameraHelper;
	exports.CanvasTexture = CanvasTexture;
	exports.CapsuleBufferGeometry = CapsuleGeometry;
	exports.CapsuleGeometry = CapsuleGeometry;
	exports.CatmullRomCurve3 = CatmullRomCurve3;
	exports.CineonToneMapping = CineonToneMapping;
	exports.CircleBufferGeometry = CircleGeometry;
	exports.CircleGeometry = CircleGeometry;
	exports.ClampToEdgeWrapping = ClampToEdgeWrapping;
	exports.Clock = Clock;
	exports.Color = Color;
	exports.ColorKeyframeTrack = ColorKeyframeTrack;
	exports.ColorManagement = ColorManagement;
	exports.CompressedTexture = CompressedTexture;
	exports.CompressedTextureLoader = CompressedTextureLoader;
	exports.ConeBufferGeometry = ConeGeometry;
	exports.ConeGeometry = ConeGeometry;
	exports.CubeCamera = CubeCamera;
	exports.CubeReflectionMapping = CubeReflectionMapping;
	exports.CubeRefractionMapping = CubeRefractionMapping;
	exports.CubeTexture = CubeTexture;
	exports.CubeTextureLoader = CubeTextureLoader;
	exports.CubeUVReflectionMapping = CubeUVReflectionMapping;
	exports.CubicBezierCurve = CubicBezierCurve;
	exports.CubicBezierCurve3 = CubicBezierCurve3;
	exports.CubicInterpolant = CubicInterpolant;
	exports.CullFaceBack = CullFaceBack;
	exports.CullFaceFront = CullFaceFront;
	exports.CullFaceFrontBack = CullFaceFrontBack;
	exports.CullFaceNone = CullFaceNone;
	exports.Curve = Curve;
	exports.CurvePath = CurvePath;
	exports.CustomBlending = CustomBlending;
	exports.CustomToneMapping = CustomToneMapping;
	exports.CylinderBufferGeometry = CylinderGeometry;
	exports.CylinderGeometry = CylinderGeometry;
	exports.Cylindrical = Cylindrical;
	exports.Data3DTexture = Data3DTexture;
	exports.DataArrayTexture = DataArrayTexture;
	exports.DataTexture = DataTexture;
	exports.DataTexture2DArray = DataTexture2DArray;
	exports.DataTexture3D = DataTexture3D;
	exports.DataTextureLoader = DataTextureLoader;
	exports.DataUtils = DataUtils;
	exports.DecrementStencilOp = DecrementStencilOp;
	exports.DecrementWrapStencilOp = DecrementWrapStencilOp;
	exports.DefaultLoadingManager = DefaultLoadingManager;
	exports.DepthFormat = DepthFormat;
	exports.DepthStencilFormat = DepthStencilFormat;
	exports.DepthTexture = DepthTexture;
	exports.DirectionalLight = DirectionalLight;
	exports.DirectionalLightHelper = DirectionalLightHelper;
	exports.DiscreteInterpolant = DiscreteInterpolant;
	exports.DodecahedronBufferGeometry = DodecahedronGeometry;
	exports.DodecahedronGeometry = DodecahedronGeometry;
	exports.DoubleSide = DoubleSide;
	exports.DstAlphaFactor = DstAlphaFactor;
	exports.DstColorFactor = DstColorFactor;
	exports.DynamicCopyUsage = DynamicCopyUsage;
	exports.DynamicDrawUsage = DynamicDrawUsage;
	exports.DynamicReadUsage = DynamicReadUsage;
	exports.EdgesGeometry = EdgesGeometry;
	exports.EllipseCurve = EllipseCurve;
	exports.EqualDepth = EqualDepth;
	exports.EqualStencilFunc = EqualStencilFunc;
	exports.EquirectangularReflectionMapping = EquirectangularReflectionMapping;
	exports.EquirectangularRefractionMapping = EquirectangularRefractionMapping;
	exports.Euler = Euler;
	exports.EventDispatcher = EventDispatcher;
	exports.ExtrudeBufferGeometry = ExtrudeGeometry;
	exports.ExtrudeGeometry = ExtrudeGeometry;
	exports.FileLoader = FileLoader;
	exports.FlatShading = FlatShading;
	exports.Float16BufferAttribute = Float16BufferAttribute;
	exports.Float32BufferAttribute = Float32BufferAttribute;
	exports.Float64BufferAttribute = Float64BufferAttribute;
	exports.FloatType = FloatType;
	exports.Fog = Fog;
	exports.FogExp2 = FogExp2;
	exports.Font = Font;
	exports.FontLoader = FontLoader;
	exports.FramebufferTexture = FramebufferTexture;
	exports.FrontSide = FrontSide;
	exports.Frustum = Frustum;
	exports.GLBufferAttribute = GLBufferAttribute;
	exports.GLSL1 = GLSL1;
	exports.GLSL3 = GLSL3;
	exports.GreaterDepth = GreaterDepth;
	exports.GreaterEqualDepth = GreaterEqualDepth;
	exports.GreaterEqualStencilFunc = GreaterEqualStencilFunc;
	exports.GreaterStencilFunc = GreaterStencilFunc;
	exports.GridHelper = GridHelper;
	exports.Group = Group;
	exports.HalfFloatType = HalfFloatType;
	exports.HemisphereLight = HemisphereLight;
	exports.HemisphereLightHelper = HemisphereLightHelper;
	exports.HemisphereLightProbe = HemisphereLightProbe;
	exports.IcosahedronBufferGeometry = IcosahedronGeometry;
	exports.IcosahedronGeometry = IcosahedronGeometry;
	exports.ImageBitmapLoader = ImageBitmapLoader;
	exports.ImageLoader = ImageLoader;
	exports.ImageUtils = ImageUtils;
	exports.ImmediateRenderObject = ImmediateRenderObject;
	exports.IncrementStencilOp = IncrementStencilOp;
	exports.IncrementWrapStencilOp = IncrementWrapStencilOp;
	exports.InstancedBufferAttribute = InstancedBufferAttribute;
	exports.InstancedBufferGeometry = InstancedBufferGeometry;
	exports.InstancedInterleavedBuffer = InstancedInterleavedBuffer;
	exports.InstancedMesh = InstancedMesh;
	exports.Int16BufferAttribute = Int16BufferAttribute;
	exports.Int32BufferAttribute = Int32BufferAttribute;
	exports.Int8BufferAttribute = Int8BufferAttribute;
	exports.IntType = IntType;
	exports.InterleavedBuffer = InterleavedBuffer;
	exports.InterleavedBufferAttribute = InterleavedBufferAttribute;
	exports.Interpolant = Interpolant;
	exports.InterpolateDiscrete = InterpolateDiscrete;
	exports.InterpolateLinear = InterpolateLinear;
	exports.InterpolateSmooth = InterpolateSmooth;
	exports.InvertStencilOp = InvertStencilOp;
	exports.KeepStencilOp = KeepStencilOp;
	exports.KeyframeTrack = KeyframeTrack;
	exports.LOD = LOD;
	exports.LatheBufferGeometry = LatheGeometry;
	exports.LatheGeometry = LatheGeometry;
	exports.Layers = Layers;
	exports.LessDepth = LessDepth;
	exports.LessEqualDepth = LessEqualDepth;
	exports.LessEqualStencilFunc = LessEqualStencilFunc;
	exports.LessStencilFunc = LessStencilFunc;
	exports.Light = Light;
	exports.LightProbe = LightProbe;
	exports.Line = Line;
	exports.Line3 = Line3;
	exports.LineBasicMaterial = LineBasicMaterial;
	exports.LineCurve = LineCurve;
	exports.LineCurve3 = LineCurve3;
	exports.LineDashedMaterial = LineDashedMaterial;
	exports.LineLoop = LineLoop;
	exports.LineSegments = LineSegments;
	exports.LinearEncoding = LinearEncoding;
	exports.LinearFilter = LinearFilter;
	exports.LinearInterpolant = LinearInterpolant;
	exports.LinearMipMapLinearFilter = LinearMipMapLinearFilter;
	exports.LinearMipMapNearestFilter = LinearMipMapNearestFilter;
	exports.LinearMipmapLinearFilter = LinearMipmapLinearFilter;
	exports.LinearMipmapNearestFilter = LinearMipmapNearestFilter;
	exports.LinearSRGBColorSpace = LinearSRGBColorSpace;
	exports.LinearToneMapping = LinearToneMapping;
	exports.Loader = Loader;
	exports.LoaderUtils = LoaderUtils;
	exports.LoadingManager = LoadingManager;
	exports.LoopOnce = LoopOnce;
	exports.LoopPingPong = LoopPingPong;
	exports.LoopRepeat = LoopRepeat;
	exports.LuminanceAlphaFormat = LuminanceAlphaFormat;
	exports.LuminanceFormat = LuminanceFormat;
	exports.MOUSE = MOUSE;
	exports.Material = Material;
	exports.MaterialLoader = MaterialLoader;
	exports.MathUtils = MathUtils;
	exports.Matrix3 = Matrix3;
	exports.Matrix4 = Matrix4;
	exports.MaxEquation = MaxEquation;
	exports.Mesh = Mesh;
	exports.MeshBasicMaterial = MeshBasicMaterial;
	exports.MeshDepthMaterial = MeshDepthMaterial;
	exports.MeshDistanceMaterial = MeshDistanceMaterial;
	exports.MeshLambertMaterial = MeshLambertMaterial;
	exports.MeshMatcapMaterial = MeshMatcapMaterial;
	exports.MeshNormalMaterial = MeshNormalMaterial;
	exports.MeshPhongMaterial = MeshPhongMaterial;
	exports.MeshPhysicalMaterial = MeshPhysicalMaterial;
	exports.MeshStandardMaterial = MeshStandardMaterial;
	exports.MeshToonMaterial = MeshToonMaterial;
	exports.MinEquation = MinEquation;
	exports.MirroredRepeatWrapping = MirroredRepeatWrapping;
	exports.MixOperation = MixOperation;
	exports.MultiplyBlending = MultiplyBlending;
	exports.MultiplyOperation = MultiplyOperation;
	exports.NearestFilter = NearestFilter;
	exports.NearestMipMapLinearFilter = NearestMipMapLinearFilter;
	exports.NearestMipMapNearestFilter = NearestMipMapNearestFilter;
	exports.NearestMipmapLinearFilter = NearestMipmapLinearFilter;
	exports.NearestMipmapNearestFilter = NearestMipmapNearestFilter;
	exports.NeverDepth = NeverDepth;
	exports.NeverStencilFunc = NeverStencilFunc;
	exports.NoBlending = NoBlending;
	exports.NoColorSpace = NoColorSpace;
	exports.NoToneMapping = NoToneMapping;
	exports.NormalAnimationBlendMode = NormalAnimationBlendMode;
	exports.NormalBlending = NormalBlending;
	exports.NotEqualDepth = NotEqualDepth;
	exports.NotEqualStencilFunc = NotEqualStencilFunc;
	exports.NumberKeyframeTrack = NumberKeyframeTrack;
	exports.Object3D = Object3D;
	exports.ObjectLoader = ObjectLoader;
	exports.ObjectSpaceNormalMap = ObjectSpaceNormalMap;
	exports.OctahedronBufferGeometry = OctahedronGeometry;
	exports.OctahedronGeometry = OctahedronGeometry;
	exports.OneFactor = OneFactor;
	exports.OneMinusDstAlphaFactor = OneMinusDstAlphaFactor;
	exports.OneMinusDstColorFactor = OneMinusDstColorFactor;
	exports.OneMinusSrcAlphaFactor = OneMinusSrcAlphaFactor;
	exports.OneMinusSrcColorFactor = OneMinusSrcColorFactor;
	exports.OrthographicCamera = OrthographicCamera;
	exports.PCFShadowMap = PCFShadowMap;
	exports.PCFSoftShadowMap = PCFSoftShadowMap;
	exports.PMREMGenerator = PMREMGenerator;
	exports.ParametricGeometry = ParametricGeometry;
	exports.Path = Path;
	exports.PerspectiveCamera = PerspectiveCamera;
	exports.Plane = Plane;
	exports.PlaneBufferGeometry = PlaneGeometry;
	exports.PlaneGeometry = PlaneGeometry;
	exports.PlaneHelper = PlaneHelper;
	exports.PointLight = PointLight;
	exports.PointLightHelper = PointLightHelper;
	exports.Points = Points;
	exports.PointsMaterial = PointsMaterial;
	exports.PolarGridHelper = PolarGridHelper;
	exports.PolyhedronBufferGeometry = PolyhedronGeometry;
	exports.PolyhedronGeometry = PolyhedronGeometry;
	exports.PositionalAudio = PositionalAudio;
	exports.PropertyBinding = PropertyBinding;
	exports.PropertyMixer = PropertyMixer;
	exports.QuadraticBezierCurve = QuadraticBezierCurve;
	exports.QuadraticBezierCurve3 = QuadraticBezierCurve3;
	exports.Quaternion = Quaternion;
	exports.QuaternionKeyframeTrack = QuaternionKeyframeTrack;
	exports.QuaternionLinearInterpolant = QuaternionLinearInterpolant;
	exports.REVISION = REVISION;
	exports.RGBADepthPacking = RGBADepthPacking;
	exports.RGBAFormat = RGBAFormat;
	exports.RGBAIntegerFormat = RGBAIntegerFormat;
	exports.RGBA_ASTC_10x10_Format = RGBA_ASTC_10x10_Format;
	exports.RGBA_ASTC_10x5_Format = RGBA_ASTC_10x5_Format;
	exports.RGBA_ASTC_10x6_Format = RGBA_ASTC_10x6_Format;
	exports.RGBA_ASTC_10x8_Format = RGBA_ASTC_10x8_Format;
	exports.RGBA_ASTC_12x10_Format = RGBA_ASTC_12x10_Format;
	exports.RGBA_ASTC_12x12_Format = RGBA_ASTC_12x12_Format;
	exports.RGBA_ASTC_4x4_Format = RGBA_ASTC_4x4_Format;
	exports.RGBA_ASTC_5x4_Format = RGBA_ASTC_5x4_Format;
	exports.RGBA_ASTC_5x5_Format = RGBA_ASTC_5x5_Format;
	exports.RGBA_ASTC_6x5_Format = RGBA_ASTC_6x5_Format;
	exports.RGBA_ASTC_6x6_Format = RGBA_ASTC_6x6_Format;
	exports.RGBA_ASTC_8x5_Format = RGBA_ASTC_8x5_Format;
	exports.RGBA_ASTC_8x6_Format = RGBA_ASTC_8x6_Format;
	exports.RGBA_ASTC_8x8_Format = RGBA_ASTC_8x8_Format;
	exports.RGBA_BPTC_Format = RGBA_BPTC_Format;
	exports.RGBA_ETC2_EAC_Format = RGBA_ETC2_EAC_Format;
	exports.RGBA_PVRTC_2BPPV1_Format = RGBA_PVRTC_2BPPV1_Format;
	exports.RGBA_PVRTC_4BPPV1_Format = RGBA_PVRTC_4BPPV1_Format;
	exports.RGBA_S3TC_DXT1_Format = RGBA_S3TC_DXT1_Format;
	exports.RGBA_S3TC_DXT3_Format = RGBA_S3TC_DXT3_Format;
	exports.RGBA_S3TC_DXT5_Format = RGBA_S3TC_DXT5_Format;
	exports.RGBFormat = RGBFormat;
	exports.RGB_ETC1_Format = RGB_ETC1_Format;
	exports.RGB_ETC2_Format = RGB_ETC2_Format;
	exports.RGB_PVRTC_2BPPV1_Format = RGB_PVRTC_2BPPV1_Format;
	exports.RGB_PVRTC_4BPPV1_Format = RGB_PVRTC_4BPPV1_Format;
	exports.RGB_S3TC_DXT1_Format = RGB_S3TC_DXT1_Format;
	exports.RGFormat = RGFormat;
	exports.RGIntegerFormat = RGIntegerFormat;
	exports.RawShaderMaterial = RawShaderMaterial;
	exports.Ray = Ray;
	exports.Raycaster = Raycaster;
	exports.RectAreaLight = RectAreaLight;
	exports.RedFormat = RedFormat;
	exports.RedIntegerFormat = RedIntegerFormat;
	exports.ReinhardToneMapping = ReinhardToneMapping;
	exports.RepeatWrapping = RepeatWrapping;
	exports.ReplaceStencilOp = ReplaceStencilOp;
	exports.ReverseSubtractEquation = ReverseSubtractEquation;
	exports.RingBufferGeometry = RingGeometry;
	exports.RingGeometry = RingGeometry;
	exports.SRGBColorSpace = SRGBColorSpace;
	exports.Scene = Scene;
	exports.ShaderChunk = ShaderChunk;
	exports.ShaderLib = ShaderLib;
	exports.ShaderMaterial = ShaderMaterial;
	exports.ShadowMaterial = ShadowMaterial;
	exports.Shape = Shape;
	exports.ShapeBufferGeometry = ShapeGeometry;
	exports.ShapeGeometry = ShapeGeometry;
	exports.ShapePath = ShapePath;
	exports.ShapeUtils = ShapeUtils;
	exports.ShortType = ShortType;
	exports.Skeleton = Skeleton;
	exports.SkeletonHelper = SkeletonHelper;
	exports.SkinnedMesh = SkinnedMesh;
	exports.SmoothShading = SmoothShading;
	exports.Source = Source;
	exports.Sphere = Sphere;
	exports.SphereBufferGeometry = SphereGeometry;
	exports.SphereGeometry = SphereGeometry;
	exports.Spherical = Spherical;
	exports.SphericalHarmonics3 = SphericalHarmonics3;
	exports.SplineCurve = SplineCurve;
	exports.SpotLight = SpotLight;
	exports.SpotLightHelper = SpotLightHelper;
	exports.Sprite = Sprite;
	exports.SpriteMaterial = SpriteMaterial;
	exports.SrcAlphaFactor = SrcAlphaFactor;
	exports.SrcAlphaSaturateFactor = SrcAlphaSaturateFactor;
	exports.SrcColorFactor = SrcColorFactor;
	exports.StaticCopyUsage = StaticCopyUsage;
	exports.StaticDrawUsage = StaticDrawUsage;
	exports.StaticReadUsage = StaticReadUsage;
	exports.StereoCamera = StereoCamera;
	exports.StreamCopyUsage = StreamCopyUsage;
	exports.StreamDrawUsage = StreamDrawUsage;
	exports.StreamReadUsage = StreamReadUsage;
	exports.StringKeyframeTrack = StringKeyframeTrack;
	exports.SubtractEquation = SubtractEquation;
	exports.SubtractiveBlending = SubtractiveBlending;
	exports.TOUCH = TOUCH;
	exports.TangentSpaceNormalMap = TangentSpaceNormalMap;
	exports.TetrahedronBufferGeometry = TetrahedronGeometry;
	exports.TetrahedronGeometry = TetrahedronGeometry;
	exports.TextGeometry = TextGeometry;
	exports.Texture = Texture;
	exports.TextureLoader = TextureLoader;
	exports.TorusBufferGeometry = TorusGeometry;
	exports.TorusGeometry = TorusGeometry;
	exports.TorusKnotBufferGeometry = TorusKnotGeometry;
	exports.TorusKnotGeometry = TorusKnotGeometry;
	exports.Triangle = Triangle;
	exports.TriangleFanDrawMode = TriangleFanDrawMode;
	exports.TriangleStripDrawMode = TriangleStripDrawMode;
	exports.TrianglesDrawMode = TrianglesDrawMode;
	exports.TubeBufferGeometry = TubeGeometry;
	exports.TubeGeometry = TubeGeometry;
	exports.UVMapping = UVMapping;
	exports.Uint16BufferAttribute = Uint16BufferAttribute;
	exports.Uint32BufferAttribute = Uint32BufferAttribute;
	exports.Uint8BufferAttribute = Uint8BufferAttribute;
	exports.Uint8ClampedBufferAttribute = Uint8ClampedBufferAttribute;
	exports.Uniform = Uniform;
	exports.UniformsGroup = UniformsGroup;
	exports.UniformsLib = UniformsLib;
	exports.UniformsUtils = UniformsUtils;
	exports.UnsignedByteType = UnsignedByteType;
	exports.UnsignedInt248Type = UnsignedInt248Type;
	exports.UnsignedIntType = UnsignedIntType;
	exports.UnsignedShort4444Type = UnsignedShort4444Type;
	exports.UnsignedShort5551Type = UnsignedShort5551Type;
	exports.UnsignedShortType = UnsignedShortType;
	exports.VSMShadowMap = VSMShadowMap;
	exports.Vector2 = Vector2;
	exports.Vector3 = Vector3;
	exports.Vector4 = Vector4;
	exports.VectorKeyframeTrack = VectorKeyframeTrack;
	exports.VideoTexture = VideoTexture;
	exports.WebGL1Renderer = WebGL1Renderer;
	exports.WebGL3DRenderTarget = WebGL3DRenderTarget;
	exports.WebGLArrayRenderTarget = WebGLArrayRenderTarget;
	exports.WebGLCubeRenderTarget = WebGLCubeRenderTarget;
	exports.WebGLMultipleRenderTargets = WebGLMultipleRenderTargets;
	exports.WebGLMultisampleRenderTarget = WebGLMultisampleRenderTarget;
	exports.WebGLRenderTarget = WebGLRenderTarget;
	exports.WebGLRenderer = WebGLRenderer;
	exports.WebGLUtils = WebGLUtils;
	exports.WireframeGeometry = WireframeGeometry;
	exports.WrapAroundEnding = WrapAroundEnding;
	exports.ZeroCurvatureEnding = ZeroCurvatureEnding;
	exports.ZeroFactor = ZeroFactor;
	exports.ZeroSlopeEnding = ZeroSlopeEnding;
	exports.ZeroStencilOp = ZeroStencilOp;
	exports._SRGBAFormat = _SRGBAFormat;
	exports.sRGBEncoding = sRGBEncoding;

	Object.defineProperty(exports, '__esModule', { value: true });

}));
;
THREE.HorizontalBlurShader = {
    uniforms: {
        tDiffuse: {
            type: 't',
            value: null,
        },
        h: {
            type: 'f',
            value: 1 / 512,
        },
    },
    vertexShader: ['varying vec2 vUv;', 'void main() {', 'vUv = uv;', 'gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );', '}'].join('\n'),
    fragmentShader: [
        'uniform sampler2D tDiffuse;',
        'uniform float h;',
        'varying vec2 vUv;',
        'void main() {',
        'vec4 sum = vec4( 0.0 );',
        'sum += texture2D( tDiffuse, vec2( vUv.x - 4.0 * h, vUv.y ) ) * 0.051;',
        'sum += texture2D( tDiffuse, vec2( vUv.x - 3.0 * h, vUv.y ) ) * 0.0918;',
        'sum += texture2D( tDiffuse, vec2( vUv.x - 2.0 * h, vUv.y ) ) * 0.12245;',
        'sum += texture2D( tDiffuse, vec2( vUv.x - 1.0 * h, vUv.y ) ) * 0.1531;',
        'sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y ) ) * 0.1633;',
        'sum += texture2D( tDiffuse, vec2( vUv.x + 1.0 * h, vUv.y ) ) * 0.1531;',
        'sum += texture2D( tDiffuse, vec2( vUv.x + 2.0 * h, vUv.y ) ) * 0.12245;',
        'sum += texture2D( tDiffuse, vec2( vUv.x + 3.0 * h, vUv.y ) ) * 0.0918;',
        'sum += texture2D( tDiffuse, vec2( vUv.x + 4.0 * h, vUv.y ) ) * 0.051;',
        'gl_FragColor = sum;',
        '}',
    ].join('\n'),
}

THREE.VerticalBlurShader = {
    uniforms: {
        tDiffuse: {
            type: 't',
            value: null,
        },
        v: {
            type: 'f',
            value: 1 / 512,
        },
    },
    vertexShader: ['varying vec2 vUv;', 'void main() {', 'vUv = uv;', 'gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );', '}'].join('\n'),
    fragmentShader: [
        'uniform sampler2D tDiffuse;',
        'uniform float v;',
        'varying vec2 vUv;',
        'void main() {',
        'vec4 sum = vec4( 0.0 );',
        'sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 4.0 * v ) ) * 0.051;',
        'sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 3.0 * v ) ) * 0.0918;',
        'sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 2.0 * v ) ) * 0.12245;',
        'sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 1.0 * v ) ) * 0.1531;',
        'sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y ) ) * 0.1633;',
        'sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 1.0 * v ) ) * 0.1531;',
        'sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 2.0 * v ) ) * 0.12245;',
        'sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 3.0 * v ) ) * 0.0918;',
        'sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 4.0 * v ) ) * 0.051;',
        'gl_FragColor = sum;',
        '}',
    ].join('\n'),
}

THREE.ShaderPass = function (material, t) {
    this.textureID = void 0 !== t ? t : 'tDiffuse'
    if (material instanceof THREE.ShaderMaterial) {
        this.uniforms = material.uniforms
        this.material = material
    } else if (material) {
        this.uniforms = THREE.UniformsUtils.clone(material.uniforms)
        this.material = new THREE.ShaderMaterial({
            defines: material.defines || {},
            uniforms: this.uniforms,
            vertexShader: material.vertexShader,
            fragmentShader: material.fragmentShader,
        })
    }

    this.renderToScreen = !1
    this.enabled = !0
    this.needsSwap = !0
    this.clear = !1
    this.camera = new THREE.OrthographicCamera(-1, 1, 1, -1, 0, 1)
    this.scene = new THREE.Scene()
    this.quad = new THREE.Mesh(new THREE.PlaneBufferGeometry(2, 2), null)
    this.scene.add(this.quad)
}

THREE.ShaderPass.prototype = {
    render:function(e, t, i, n) {
        this.uniforms[this.textureID] && (this.uniforms[this.textureID].value = i)
        this.quad.material = this.material
        if (this.renderToScreen) {
            e.render(this.scene, this.camera)
        } else {
            e.render(this.scene, this.camera, t, this.clear)
        }
        //this.renderToScreen ? e.render(this.scene, this.camera) : e.render(this.scene, this.camera, t, this.clear)
    },
}

THREE.ImageUtils.crossOrigin = 'anonymous'
;
!(function () {
    if (('performance' in window == 0 && (window.performance = {}), 'now' in window.performance == 0)) {
        var e = Date.now()
        performance.timing && performance.timing.navigationStart && (e = performance.timing.navigationStart),
            (window.performance.now = function () {
                return Date.now() - e
            })
    }
})(),
    (THREE.WebGLRenderer.prototype.paramThreeToGL = function (e) {
        var t,
            i = this.extensions,
            r = this.getContext()   // this.context
        if (e === THREE.RepeatWrapping) return r.REPEAT
        if (e === THREE.ClampToEdgeWrapping) return r.CLAMP_TO_EDGE
        if (e === THREE.MirroredRepeatWrapping) return r.MIRRORED_REPEAT
        if (e === THREE.NearestFilter) return r.NEAREST
        if (e === THREE.NearestMipMapNearestFilter) return r.NEAREST_MIPMAP_NEAREST
        if (e === THREE.NearestMipMapLinearFilter) return r.NEAREST_MIPMAP_LINEAR
        if (e === THREE.LinearFilter) return r.LINEAR
        if (e === THREE.LinearMipMapNearestFilter) return r.LINEAR_MIPMAP_NEAREST
        if (e === THREE.LinearMipMapLinearFilter) return r.LINEAR_MIPMAP_LINEAR
        if (e === THREE.UnsignedByteType) return r.UNSIGNED_BYTE
        if (e === THREE.UnsignedShort4444Type) return r.UNSIGNED_SHORT_4_4_4_4
        if (e === THREE.UnsignedShort5551Type) return r.UNSIGNED_SHORT_5_5_5_1
        if (e === THREE.UnsignedShort565Type) return r.UNSIGNED_SHORT_5_6_5
        if (e === THREE.ByteType) return r.BYTE
        if (e === THREE.ShortType) return r.SHORT
        if (e === THREE.UnsignedShortType) return r.UNSIGNED_SHORT
        if (e === THREE.IntType) return r.INT
        if (e === THREE.UnsignedIntType) return r.UNSIGNED_INT
        if (e === THREE.FloatType) return r.FLOAT
        if (e === THREE.HalfFloatType && i.get('OES_texture_half_float') !== null) return t.HALF_FLOAT_OES
        if (e === THREE.AlphaFormat) return r.ALPHA
        if (e === THREE.RGBFormat) return r.RGB
        if (e === THREE.RGBAFormat) return r.RGBA
        if (e === THREE.LuminanceFormat) return r.LUMINANCE
        if (e === THREE.LuminanceAlphaFormat) return r.LUMINANCE_ALPHA
        if (e === THREE.AddEquation) return r.FUNC_ADD
        if (e === THREE.SubtractEquation) return r.FUNC_SUBTRACT
        if (e === THREE.ReverseSubtractEquation) return r.FUNC_REVERSE_SUBTRACT
        if (e === THREE.ZeroFactor) return r.ZERO
        if (e === THREE.OneFactor) return r.ONE
        if (e === THREE.SrcColorFactor) return r.SRC_COLOR
        if (e === THREE.OneMinusSrcColorFactor) return r.ONE_MINUS_SRC_COLOR
        if (e === THREE.SrcAlphaFactor) return r.SRC_ALPHA
        if (e === THREE.OneMinusSrcAlphaFactor) return r.ONE_MINUS_SRC_ALPHA
        if (e === THREE.DstAlphaFactor) return r.DST_ALPHA
        if (e === THREE.OneMinusDstAlphaFactor) return r.ONE_MINUS_DST_ALPHA
        if (e === THREE.DstColorFactor) return r.DST_COLOR
        if (e === THREE.OneMinusDstColorFactor) return r.ONE_MINUS_DST_COLOR
        if (e === THREE.SrcAlphaSaturateFactor) return r.SRC_ALPHA_SATURATE
        if (((t = i.get('WEBGL_compressed_texture_s3tc')), null !== t)) {
            if (e === THREE.RGB_S3TC_DXT1_Format) return t.COMPRESSED_RGB_S3TC_DXT1_EXT
            if (e === THREE.RGBA_S3TC_DXT1_Format) return t.COMPRESSED_RGBA_S3TC_DXT1_EXT
            if (e === THREE.RGBA_S3TC_DXT3_Format) return t.COMPRESSED_RGBA_S3TC_DXT3_EXT
            if (e === THREE.RGBA_S3TC_DXT5_Format) return t.COMPRESSED_RGBA_S3TC_DXT5_EXT
        }
        if (((t = i.get('WEBGL_compressed_texture_pvrtc')), null !== t)) {
            if (e === THREE.RGB_PVRTC_4BPPV1_Format) return t.COMPRESSED_RGB_PVRTC_4BPPV1_IMG
            if (e === THREE.RGB_PVRTC_2BPPV1_Format) return t.COMPRESSED_RGB_PVRTC_2BPPV1_IMG
            if (e === THREE.RGBA_PVRTC_4BPPV1_Format) return t.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG
            if (e === THREE.RGBA_PVRTC_2BPPV1_Format) return t.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG
        }
        if (((t = i.get('WEBGL_compressed_texture_etc1')), null !== t && e === THREE.RGB_ETC1_Format)) return t.COMPRESSED_RGB_ETC1_WEBGL
        if (((t = i.get('EXT_blend_minmax')), null !== t)) {
            if (e === THREE.MinEquation) return t.MIN_EXT
            if (e === THREE.MaxEquation) return t.MAX_EXT
        }
        return 0
    }),
    (THREE.WebGLState = function (e, t, i) {
        var r = this,
            o = new THREE.Vector4(),
            a = e.getParameter(e.MAX_VERTEX_ATTRIBS),
            s = new Uint8Array(a),
            l = new Uint8Array(a),
            c = new Uint8Array(a),
            h = {},
            u = null,
            d = null,
            p = null,
            f = null,
            g = null,
            m = null,
            v = null,
            A = null,
            y = !1,
            C = null,
            I = null,
            E = null,
            b = null,
            w = null,
            _ = null,
            T = null,
            x = null,
            S = null,
            M = null,
            R = null,
            P = null,
            O = null,
            L = null,
            D = null,
            N = e.getParameter(e.MAX_TEXTURE_IMAGE_UNITS),
            B = void 0,
            F = {},
            V = new THREE.Vector4(),
            U = null,
            k = null,
            H = new THREE.Vector4(),
            G = new THREE.Vector4()
        ;(this.init = function () {
            this.clearColor(0, 0, 0, 1),
                this.clearDepth(1),
                this.clearStencil(0),
                this.enable(e.DEPTH_TEST),
                e.depthFunc(e.LEQUAL),
                e.frontFace(e.CCW),
                e.cullFace(e.BACK),
                this.enable(e.CULL_FACE),
                this.enable(e.BLEND),
                e.blendEquation(e.FUNC_ADD),
                e.blendFunc(e.SRC_ALPHA, e.ONE_MINUS_SRC_ALPHA)
        }),
            (this.initAttributes = function () {
                for (var e = 0, t = s.length; e < t; e++) s[e] = 0
            }),
            (this.enableAttribute = function (i) {
                if (((s[i] = 1), 0 === l[i] && (e.enableVertexAttribArray(i), (l[i] = 1)), 0 !== c[i])) {
                    var n = t.get('ANGLE_instanced_arrays')
                    n.vertexAttribDivisorANGLE(i, 0), (c[i] = 0)
                }
            }),
            (this.enableAttributeAndDivisor = function (t, i, n) {
                ;(s[t] = 1), 0 === l[t] && (e.enableVertexAttribArray(t), (l[t] = 1)), c[t] !== i && (n.vertexAttribDivisorANGLE(t, i), (c[t] = i))
            }),
            (this.disableUnusedAttributes = function () {
                for (var t = 0, i = l.length; t < i; t++) l[t] !== s[t] && (e.disableVertexAttribArray(t), (l[t] = 0))
            }),
            (this.enable = function (t) {
                h[t] !== !0 && (e.enable(t), (h[t] = !0))
            }),
            (this.disable = function (t) {
                h[t] !== !1 && (e.disable(t), (h[t] = !1))
            }),
            (this.getCompressedTextureFormats = function () {
                if (null === u && ((u = []), t.get('WEBGL_compressed_texture_pvrtc') || t.get('WEBGL_compressed_texture_s3tc') || t.get('WEBGL_compressed_texture_etc1')))
                    for (var i = e.getParameter(e.COMPRESSED_TEXTURE_FORMATS), n = 0; n < i.length; n++) u.push(i[n])
                return u
            }),
            (this.setBlending = function (t, r, o, a, s, l, c, h) {
                t === THREE.NoBlending ? this.disable(e.BLEND) : this.enable(e.BLEND),
                    (t === d && h === y) ||
                        (t === THREE.AdditiveBlending
                            ? h
                                ? (e.blendEquationSeparate(e.FUNC_ADD, e.FUNC_ADD), e.blendFuncSeparate(e.ONE, e.ONE, e.ONE, e.ONE))
                                : (e.blendEquation(e.FUNC_ADD), e.blendFunc(e.SRC_ALPHA, e.ONE))
                            : t === THREE.SubtractiveBlending
                            ? h
                                ? (e.blendEquationSeparate(e.FUNC_ADD, e.FUNC_ADD), e.blendFuncSeparate(e.ZERO, e.ZERO, e.ONE_MINUS_SRC_COLOR, e.ONE_MINUS_SRC_ALPHA))
                                : (e.blendEquation(e.FUNC_ADD), e.blendFunc(e.ZERO, e.ONE_MINUS_SRC_COLOR))
                            : t === THREE.MultiplyBlending
                            ? h
                                ? (e.blendEquationSeparate(e.FUNC_ADD, e.FUNC_ADD), e.blendFuncSeparate(e.ZERO, e.ZERO, e.SRC_COLOR, e.SRC_ALPHA))
                                : (e.blendEquation(e.FUNC_ADD), e.blendFunc(e.ZERO, e.SRC_COLOR))
                            : h
                            ? (e.blendEquationSeparate(e.FUNC_ADD, e.FUNC_ADD), e.blendFuncSeparate(e.ONE, e.ONE_MINUS_SRC_ALPHA, e.ONE, e.ONE_MINUS_SRC_ALPHA))
                            : (e.blendEquationSeparate(e.FUNC_ADD, e.FUNC_ADD), e.blendFuncSeparate(e.SRC_ALPHA, e.ONE_MINUS_SRC_ALPHA, e.ONE, e.ONE_MINUS_SRC_ALPHA)),
                        (d = t),
                        (y = h)),
                    t === THREE.CustomBlending
                        ? ((s = s || r),
                          (l = l || o),
                          (c = c || a),
                          (r === p && s === m) || (e.blendEquationSeparate(i(r), i(s)), (p = r), (m = s)),
                          (o === f && a === g && l === v && c === A) || (e.blendFuncSeparate(i(o), i(a), i(l), i(c)), (f = o), (g = a), (v = l), (A = c)))
                        : ((p = null), (f = null), (g = null), (m = null), (v = null), (A = null))
            }),
            (this.setDepthFunc = function (t) {
                if (C !== t) {
                    if (t)
                        switch (t) {
                            case THREE.NeverDepth:
                                e.depthFunc(e.NEVER)
                                break
                            case THREE.AlwaysDepth:
                                e.depthFunc(e.ALWAYS)
                                break
                            case THREE.LessDepth:
                                e.depthFunc(e.LESS)
                                break
                            case THREE.LessEqualDepth:
                                e.depthFunc(e.LEQUAL)
                                break
                            case THREE.EqualDepth:
                                e.depthFunc(e.EQUAL)
                                break
                            case THREE.GreaterEqualDepth:
                                e.depthFunc(e.GEQUAL)
                                break
                            case THREE.GreaterDepth:
                                e.depthFunc(e.GREATER)
                                break
                            case THREE.NotEqualDepth:
                                e.depthFunc(e.NOTEQUAL)
                                break
                            default:
                                e.depthFunc(e.LEQUAL)
                        }
                    else e.depthFunc(e.LEQUAL)
                    C = t
                }
            }),
            (this.setDepthTest = function (t) {
                t ? this.enable(e.DEPTH_TEST) : this.disable(e.DEPTH_TEST)
            }),
            (this.setDepthWrite = function (t) {
                I !== t && (e.depthMask(t), (I = t))
            }),
            (this.setColorWrite = function (t) {
                E !== t && (e.colorMask(t, t, t, t), (E = t))
            }),
            (this.setStencilFunc = function (t, i, n) {
                ;(w === t && _ === i && T === n) || (e.stencilFunc(t, i, n), (w = t), (_ = i), (T = n))
            }),
            (this.setStencilOp = function (t, i, n) {
                ;(x === t && S === i && M === n) || (e.stencilOp(t, i, n), (x = t), (S = i), (M = n))
            }),
            (this.setStencilTest = function (t) {
                t ? this.enable(e.STENCIL_TEST) : this.disable(e.STENCIL_TEST)
            }),
            (this.setStencilWrite = function (t) {
                b !== t && (e.stencilMask(t), (b = t))
            }),
            (this.setFlipSided = function (t) {
                R !== t && (t ? e.frontFace(e.CW) : e.frontFace(e.CCW), (R = t))
            }),
            (this.setLineWidth = function (t) {
                t !== P && (e.lineWidth(t), (P = t))
            }),
            (this.setPolygonOffset = function (t, i, n) {
                t ? this.enable(e.POLYGON_OFFSET_FILL) : this.disable(e.POLYGON_OFFSET_FILL), !t || (O === i && L === n) || (e.polygonOffset(i, n), (O = i), (L = n))
            }),
            (this.getScissorTest = function () {
                return D
            }),
            (this.setScissorTest = function (t) {
                ;(D = t), t ? this.enable(e.SCISSOR_TEST) : this.disable(e.SCISSOR_TEST)
            }),
            (this.activeTexture = function (t) {
                void 0 === t && (t = e.TEXTURE0 + N - 1), B !== t && (e.activeTexture(t), (B = t))
            }),
            (this.bindTexture = function (t, i) {
                void 0 === B && r.activeTexture()
                var n = F[B]
                void 0 === n &&
                    ((n = {
                        type: void 0,
                        texture: void 0,
                    }),
                    (F[B] = n)),
                    (n.type === t && n.texture === i) || (e.bindTexture(t, i), (n.type = t), (n.texture = i))
            }),
            (this.compressedTexImage2D = function () {
                try {
                    e.compressedTexImage2D.apply(e, arguments)
                } catch (e) {
                    console.error(e)
                }
            }),
            (this.texImage2D = function () {
                try {
                    e.texImage2D.apply(e, arguments)
                } catch (e) {
                    console.error(e)
                }
            }),
            (this.clearColor = function (t, i, n, r) {
                o.set(t, i, n, r), V.equals(o) === !1 && (e.clearColor(t, i, n, r), V.copy(o))
            }),
            (this.clearDepth = function (t) {
                U !== t && (e.clearDepth(t), (U = t))
            }),
            (this.clearStencil = function (t) {
                k !== t && (e.clearStencil(t), (k = t))
            }),
            (this.scissor = function (t) {
                H.equals(t) === !1 && (e.scissor(t.x, t.y, t.z, t.w), H.copy(t))
            }),
            (this.viewport = function (t) {
                G.equals(t) === !1 && (e.viewport(t.x, t.y, t.z, t.w), G.copy(t))
            }),
            (this.reset = function () {
                for (var t = 0; t < l.length; t++) 1 === l[t] && (e.disableVertexAttribArray(t), (l[t] = 0))
                ;(h = {}), (u = null), (B = void 0), (F = {}), (d = null), (E = null), (I = null), (b = null), (R = null)
            })
    })
;
;(function () {
    /**
     * Full-screen textured quad shader
     */
    const CopyShader = {
        uniforms: {
            tDiffuse: {
                value: null,
            },
            opacity: {
                value: 1.0,
            },
        },
        vertexShader:
            /* glsl */
            `

		varying vec2 vUv;

		void main() {

			vUv = uv;
			gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );

		}`,
        fragmentShader:
            /* glsl */
            `

		uniform float opacity;

		uniform sampler2D tDiffuse;

		varying vec2 vUv;

		void main() {

			gl_FragColor = texture2D( tDiffuse, vUv );
			gl_FragColor.a *= opacity;


		}`,
    }

    THREE.CopyShader = CopyShader
})()
;
;(function () {
    /**
     * Two pass Gaussian blur filter (horizontal and vertical blur shaders)
     * - see http://www.cake23.de/traveling-wavefronts-lit-up.html
     *
     * - 9 samples per pass
     * - standard deviation 2.7
     * - "h" and "v" parameters should be set to "1 / width" and "1 / height"
     */
    const HorizontalBlurShader = {
        uniforms: {
            tDiffuse: {
                value: null,
            },
            h: {
                value: 1.0 / 512.0,
            },
        },
        vertexShader:
            /* glsl */
            `

		varying vec2 vUv;

		void main() {

			vUv = uv;
			gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );

		}`,
        fragmentShader:
            /* glsl */
            `

		uniform sampler2D tDiffuse;
		uniform float h;

		varying vec2 vUv;

		void main() {

			vec4 sum = vec4( 0.0 );

			sum += texture2D( tDiffuse, vec2( vUv.x - 4.0 * h, vUv.y ) ) * 0.051;
			sum += texture2D( tDiffuse, vec2( vUv.x - 3.0 * h, vUv.y ) ) * 0.0918;
			sum += texture2D( tDiffuse, vec2( vUv.x - 2.0 * h, vUv.y ) ) * 0.12245;
			sum += texture2D( tDiffuse, vec2( vUv.x - 1.0 * h, vUv.y ) ) * 0.1531;
			sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y ) ) * 0.1633;
			sum += texture2D( tDiffuse, vec2( vUv.x + 1.0 * h, vUv.y ) ) * 0.1531;
			sum += texture2D( tDiffuse, vec2( vUv.x + 2.0 * h, vUv.y ) ) * 0.12245;
			sum += texture2D( tDiffuse, vec2( vUv.x + 3.0 * h, vUv.y ) ) * 0.0918;
			sum += texture2D( tDiffuse, vec2( vUv.x + 4.0 * h, vUv.y ) ) * 0.051;

			gl_FragColor = sum;

		}`,
    }

    THREE.HorizontalBlurShader = HorizontalBlurShader
})()
;
;(function () {
    /**
     * Two pass Gaussian blur filter (horizontal and vertical blur shaders)
     * - see http://www.cake23.de/traveling-wavefronts-lit-up.html
     *
     * - 9 samples per pass
     * - standard deviation 2.7
     * - "h" and "v" parameters should be set to "1 / width" and "1 / height"
     */
    const VerticalBlurShader = {
        uniforms: {
            tDiffuse: {
                value: null,
            },
            v: {
                value: 1.0 / 512.0,
            },
        },
        vertexShader:
            /* glsl */
            `

		varying vec2 vUv;

		void main() {

			vUv = uv;
			gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );

		}`,
        fragmentShader:
            /* glsl */
            `

		uniform sampler2D tDiffuse;
		uniform float v;

		varying vec2 vUv;

		void main() {

			vec4 sum = vec4( 0.0 );

			sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 4.0 * v ) ) * 0.051;
			sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 3.0 * v ) ) * 0.0918;
			sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 2.0 * v ) ) * 0.12245;
			sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y - 1.0 * v ) ) * 0.1531;
			sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y ) ) * 0.1633;
			sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 1.0 * v ) ) * 0.1531;
			sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 2.0 * v ) ) * 0.12245;
			sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 3.0 * v ) ) * 0.0918;
			sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y + 4.0 * v ) ) * 0.051;

			gl_FragColor = sum;

		}`,
    }

    THREE.VerticalBlurShader = VerticalBlurShader
})()
;
;(function () {
    class EffectComposer {
        constructor(renderer, renderTarget) {
            this.renderer = renderer

            if (renderTarget === undefined) {
                const size = renderer.getSize(new THREE.Vector2())
                this._pixelRatio = renderer.getPixelRatio()
                this._width = size.width
                this._height = size.height
                renderTarget = new THREE.WebGLRenderTarget(this._width * this._pixelRatio, this._height * this._pixelRatio)
                renderTarget.texture.name = 'EffectComposer.rt1'
            } else {
                this._pixelRatio = 1
                this._width = renderTarget.width
                this._height = renderTarget.height
            }

            this.renderTarget1 = renderTarget
            this.renderTarget2 = renderTarget.clone()
            this.renderTarget2.texture.name = 'EffectComposer.rt2'
            this.writeBuffer = this.renderTarget1
            this.readBuffer = this.renderTarget2
            this.renderToScreen = true
            this.passes = [] // dependencies

            if (THREE.CopyShader === undefined) {
                console.error('THREE.EffectComposer relies on THREE.CopyShader')
            }

            if (THREE.ShaderPass === undefined) {
                console.error('THREE.EffectComposer relies on THREE.ShaderPass')
            }

            this.copyPass = new THREE.ShaderPass(THREE.CopyShader)
            this.clock = new THREE.Clock()
        }

        swapBuffers() {
            const tmp = this.readBuffer
            this.readBuffer = this.writeBuffer
            this.writeBuffer = tmp
        }

        addPass(pass) {
            this.passes.push(pass)
            pass.setSize(this._width * this._pixelRatio, this._height * this._pixelRatio)
        }

        insertPass(pass, index) {
            this.passes.splice(index, 0, pass)
            pass.setSize(this._width * this._pixelRatio, this._height * this._pixelRatio)
        }

        removePass(pass) {
            const index = this.passes.indexOf(pass)

            if (index !== -1) {
                this.passes.splice(index, 1)
            }
        }

        isLastEnabledPass(passIndex) {
            for (let i = passIndex + 1; i < this.passes.length; i++) {
                if (this.passes[i].enabled) {
                    return false
                }
            }

            return true
        }

        render(deltaTime) {
            // deltaTime value is in seconds
            if (deltaTime === undefined) {
                deltaTime = this.clock.getDelta()
            }

            const currentRenderTarget = this.renderer.getRenderTarget()
            let maskActive = false

            for (let i = 0, il = this.passes.length; i < il; i++) {
                const pass = this.passes[i]
                if (pass.enabled === false) continue
                pass.renderToScreen = this.renderToScreen && this.isLastEnabledPass(i)
                pass.render(this.renderer, this.writeBuffer, this.readBuffer, deltaTime, maskActive)

                if (pass.needsSwap) {
                    if (maskActive) {
                        const context = this.renderer.getContext()
                        const stencil = this.renderer.state.buffers.stencil //context.stencilFunc( context.NOTEQUAL, 1, 0xffffffff );

                        stencil.setFunc(context.NOTEQUAL, 1, 0xffffffff)
                        this.copyPass.render(this.renderer, this.writeBuffer, this.readBuffer, deltaTime) //context.stencilFunc( context.EQUAL, 1, 0xffffffff );

                        stencil.setFunc(context.EQUAL, 1, 0xffffffff)
                    }

                    this.swapBuffers()
                }

                if (THREE.MaskPass !== undefined) {
                    if (pass instanceof THREE.MaskPass) {
                        maskActive = true
                    } else if (pass instanceof THREE.ClearMaskPass) {
                        maskActive = false
                    }
                }
            }

            this.renderer.setRenderTarget(currentRenderTarget)
        }

        reset(renderTarget) {
            if (renderTarget === undefined) {
                const size = this.renderer.getSize(new THREE.Vector2())
                this._pixelRatio = this.renderer.getPixelRatio()
                this._width = size.width
                this._height = size.height
                renderTarget = this.renderTarget1.clone()
                renderTarget.setSize(this._width * this._pixelRatio, this._height * this._pixelRatio)
            }

            this.renderTarget1.dispose()
            this.renderTarget2.dispose()
            this.renderTarget1 = renderTarget
            this.renderTarget2 = renderTarget.clone()
            this.writeBuffer = this.renderTarget1
            this.readBuffer = this.renderTarget2
        }

        setSize(width, height) {
            this._width = width
            this._height = height
            const effectiveWidth = this._width * this._pixelRatio
            const effectiveHeight = this._height * this._pixelRatio
            this.renderTarget1.setSize(effectiveWidth, effectiveHeight)
            this.renderTarget2.setSize(effectiveWidth, effectiveHeight)

            for (let i = 0; i < this.passes.length; i++) {
                this.passes[i].setSize(effectiveWidth, effectiveHeight)
            }
        }

        setPixelRatio(pixelRatio) {
            this._pixelRatio = pixelRatio
            this.setSize(this._width, this._height)
        }
    }

    class Pass {
        constructor() {
            // if set to true, the pass is processed by the composer
            this.enabled = true // if set to true, the pass indicates to swap read and write buffer after rendering

            this.needsSwap = true // if set to true, the pass clears its buffer before rendering

            this.clear = false // if set to true, the result of the pass is rendered to screen. This is set automatically by EffectComposer.

            this.renderToScreen = false
        }

        setSize() {}

        render() {
            console.error('THREE.Pass: .render() must be implemented in derived pass.')
        }
    } // Helper for passes that need to fill the viewport with a single quad.

    const _camera = new THREE.OrthographicCamera(-1, 1, 1, -1, 0, 1) // https://github.com/mrdoob/three.js/pull/21358

    const _geometry = new THREE.BufferGeometry()

    _geometry.setAttribute('position', new THREE.Float32BufferAttribute([-1, 3, 0, -1, -1, 0, 3, -1, 0], 3))

    _geometry.setAttribute('uv', new THREE.Float32BufferAttribute([0, 2, 0, 0, 2, 0], 2))

    class FullScreenQuad {
        constructor(material) {
            this._mesh = new THREE.Mesh(_geometry, material)
        }

        dispose() {
            this._mesh.geometry.dispose()
        }

        render(renderer) {
            renderer.render(this._mesh, _camera)
        }

        get material() {
            return this._mesh.material
        }

        set material(value) {
            this._mesh.material = value
        }
    }

    THREE.EffectComposer = EffectComposer
    THREE.FullScreenQuad = FullScreenQuad
    THREE.Pass = Pass
})()
;
;(function () {
    class MaskPass extends THREE.Pass {
        constructor(scene, camera) {
            super()
            this.scene = scene
            this.camera = camera
            this.clear = true
            this.needsSwap = false
            this.inverse = false
        }

        render(
            renderer,
            writeBuffer,
            readBuffer
            /*, deltaTime, maskActive */
        ) {
            const context = renderer.getContext()
            const state = renderer.state // don't update color or depth

            state.buffers.color.setMask(false)
            state.buffers.depth.setMask(false) // lock buffers

            state.buffers.color.setLocked(true)
            state.buffers.depth.setLocked(true) // set up stencil

            let writeValue, clearValue

            if (this.inverse) {
                writeValue = 0
                clearValue = 1
            } else {
                writeValue = 1
                clearValue = 0
            }

            state.buffers.stencil.setTest(true)
            state.buffers.stencil.setOp(context.REPLACE, context.REPLACE, context.REPLACE)
            state.buffers.stencil.setFunc(context.ALWAYS, writeValue, 0xffffffff)
            state.buffers.stencil.setClear(clearValue)
            state.buffers.stencil.setLocked(true) // draw into the stencil buffer

            renderer.setRenderTarget(readBuffer)
            if (this.clear) renderer.clear()
            renderer.render(this.scene, this.camera)
            renderer.setRenderTarget(writeBuffer)
            if (this.clear) renderer.clear()
            renderer.render(this.scene, this.camera) // unlock color and depth buffer for subsequent rendering

            state.buffers.color.setLocked(false)
            state.buffers.depth.setLocked(false) // only render where stencil is set to 1

            state.buffers.stencil.setLocked(false)
            state.buffers.stencil.setFunc(context.EQUAL, 1, 0xffffffff) // draw if == 1

            state.buffers.stencil.setOp(context.KEEP, context.KEEP, context.KEEP)
            state.buffers.stencil.setLocked(true)
        }
    }

    class ClearMaskPass extends THREE.Pass {
        constructor() {
            super()
            this.needsSwap = false
        }

        render(
            renderer
            /*, writeBuffer, readBuffer, deltaTime, maskActive */
        ) {
            renderer.state.buffers.stencil.setLocked(false)
            renderer.state.buffers.stencil.setTest(false)
        }
    }

    THREE.ClearMaskPass = ClearMaskPass
    THREE.MaskPass = MaskPass
})()
;
;(function () {
    class RenderPass extends THREE.Pass {
        constructor(scene, camera, overrideMaterial, clearColor, clearAlpha) {
            super()
            this.scene = scene
            this.camera = camera
            this.overrideMaterial = overrideMaterial
            this.clearColor = clearColor
            this.clearAlpha = clearAlpha !== undefined ? clearAlpha : 0
            this.clear = true
            this.clearDepth = false
            this.needsSwap = false
            this._oldClearColor = new THREE.Color()
        }

        render(
            renderer,
            writeBuffer,
            readBuffer
            /*, deltaTime, maskActive */
        ) {
            const oldAutoClear = renderer.autoClear
            renderer.autoClear = false
            let oldClearAlpha, oldOverrideMaterial

            if (this.overrideMaterial !== undefined) {
                oldOverrideMaterial = this.scene.overrideMaterial
                this.scene.overrideMaterial = this.overrideMaterial
            }

            if (this.clearColor) {
                renderer.getClearColor(this._oldClearColor)
                oldClearAlpha = renderer.getClearAlpha()
                renderer.setClearColor(this.clearColor, this.clearAlpha)
            }

            if (this.clearDepth) {
                renderer.clearDepth()
            }

            renderer.setRenderTarget(this.renderToScreen ? null : readBuffer) // TODO: Avoid using autoClear properties, see https://github.com/mrdoob/three.js/pull/15571#issuecomment-465669600

            if (this.clear) renderer.clear(renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil)
            renderer.render(this.scene, this.camera)

            if (this.clearColor) {
                renderer.setClearColor(this._oldClearColor, oldClearAlpha)
            }

            if (this.overrideMaterial !== undefined) {
                this.scene.overrideMaterial = oldOverrideMaterial
            }

            renderer.autoClear = oldAutoClear
        }
    }

    THREE.RenderPass = RenderPass
})()
;
;(function () {
    class ShaderPass extends THREE.Pass {
        constructor(shader, textureID) {
            super()
            this.textureID = textureID !== undefined ? textureID : 'tDiffuse'

            if (shader instanceof THREE.ShaderMaterial) {
                this.uniforms = shader.uniforms
                this.material = shader
            } else if (shader) {
                this.uniforms = THREE.UniformsUtils.clone(shader.uniforms)
                this.material = new THREE.ShaderMaterial({
                    defines: Object.assign({}, shader.defines),
                    uniforms: this.uniforms,
                    vertexShader: shader.vertexShader,
                    fragmentShader: shader.fragmentShader,
                })
            }

            this.fsQuad = new THREE.FullScreenQuad(this.material)
        }

        render(
            renderer,
            writeBuffer,
            readBuffer
            /*, deltaTime, maskActive */
        ) {
            if (this.uniforms[this.textureID]) {
                this.uniforms[this.textureID].value = readBuffer.texture
            }

            this.fsQuad.material = this.material

            if (this.renderToScreen) {
                renderer.setRenderTarget(null)
                this.fsQuad.render(renderer)
            } else {
                renderer.setRenderTarget(writeBuffer) // TODO: Avoid using autoClear properties, see https://github.com/mrdoob/three.js/pull/15571#issuecomment-465669600

                if (this.clear) renderer.clear(renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil)
                this.fsQuad.render(renderer)
            }
        }
    }

    THREE.ShaderPass = ShaderPass
})()
;
;(function () {
    class GLTFLoader extends THREE.Loader {
        constructor(manager) {
            super(manager)
            this.dracoLoader = null
            this.ktx2Loader = null
            this.meshoptDecoder = null
            this.pluginCallbacks = []
            this.register(function (parser) {
                return new GLTFMaterialsClearcoatExtension(parser)
            })
            this.register(function (parser) {
                return new GLTFTextureBasisUExtension(parser)
            })
            this.register(function (parser) {
                return new GLTFTextureWebPExtension(parser)
            })
            this.register(function (parser) {
                return new GLTFMaterialsSheenExtension(parser)
            })
            this.register(function (parser) {
                return new GLTFMaterialsTransmissionExtension(parser)
            })
            this.register(function (parser) {
                return new GLTFMaterialsVolumeExtension(parser)
            })
            this.register(function (parser) {
                return new GLTFMaterialsIorExtension(parser)
            })
            this.register(function (parser) {
                return new GLTFMaterialsEmissiveStrengthExtension(parser)
            })
            this.register(function (parser) {
                return new GLTFMaterialsSpecularExtension(parser)
            })
            this.register(function (parser) {
                return new GLTFMaterialsIridescenceExtension(parser)
            })
            this.register(function (parser) {
                return new GLTFLightsExtension(parser)
            })
            this.register(function (parser) {
                return new GLTFMeshoptCompression(parser)
            })
        }

        load(url, onLoad, onProgress, onError) {
            const scope = this
            let resourcePath

            if (this.resourcePath !== '') {
                resourcePath = this.resourcePath
            } else if (this.path !== '') {
                resourcePath = this.path
            } else {
                resourcePath = THREE.LoaderUtils.extractUrlBase(url)
            } // Tells the LoadingManager to track an extra item, which resolves after
            // the model is fully loaded. This means the count of items loaded will
            // be incorrect, but ensures manager.onLoad() does not fire early.

            this.manager.itemStart(url)

            const _onError = function (e) {
                if (onError) {
                    onError(e)
                } else {
                    console.error(e)
                }

                scope.manager.itemError(url)
                scope.manager.itemEnd(url)
            }

            const loader = new THREE.FileLoader(this.manager)
            loader.setPath(this.path)
            loader.setResponseType('arraybuffer')
            loader.setRequestHeader(this.requestHeader)
            loader.setWithCredentials(this.withCredentials)
            loader.load(
                url,
                function (data) {
                    try {
                        scope.parse(
                            data,
                            resourcePath,
                            function (gltf) {
                                onLoad(gltf)
                                scope.manager.itemEnd(url)
                            },
                            _onError
                        )
                    } catch (e) {
                        _onError(e)
                    }
                },
                onProgress,
                _onError
            )
        }

        setDRACOLoader(dracoLoader) {
            this.dracoLoader = dracoLoader
            return this
        }

        setDDSLoader() {
            throw new Error('THREE.GLTFLoader: "MSFT_texture_dds" no longer supported. Please update to "KHR_texture_basisu".')
        }

        setKTX2Loader(ktx2Loader) {
            this.ktx2Loader = ktx2Loader
            return this
        }

        setMeshoptDecoder(meshoptDecoder) {
            this.meshoptDecoder = meshoptDecoder
            return this
        }

        register(callback) {
            if (this.pluginCallbacks.indexOf(callback) === -1) {
                this.pluginCallbacks.push(callback)
            }

            return this
        }

        unregister(callback) {
            if (this.pluginCallbacks.indexOf(callback) !== -1) {
                this.pluginCallbacks.splice(this.pluginCallbacks.indexOf(callback), 1)
            }

            return this
        }

        parse(data, path, onLoad, onError) {
            let content
            const extensions = {}
            const plugins = {}

            if (typeof data === 'string') {
                content = data
            } else {
                const magic = THREE.LoaderUtils.decodeText(new Uint8Array(data, 0, 4))

                if (magic === BINARY_EXTENSION_HEADER_MAGIC) {
                    try {
                        extensions[EXTENSIONS.KHR_BINARY_GLTF] = new GLTFBinaryExtension(data)
                    } catch (error) {
                        if (onError) onError(error)
                        return
                    }

                    content = extensions[EXTENSIONS.KHR_BINARY_GLTF].content
                } else {
                    content = THREE.LoaderUtils.decodeText(new Uint8Array(data))
                }
            }

            const json = JSON.parse(content)

            if (json.asset === undefined || json.asset.version[0] < 2) {
                if (onError) onError(new Error('THREE.GLTFLoader: Unsupported asset. glTF versions >=2.0 are supported.'))
                return
            }

            const parser = new GLTFParser(json, {
                path: path || this.resourcePath || '',
                crossOrigin: this.crossOrigin,
                requestHeader: this.requestHeader,
                manager: this.manager,
                ktx2Loader: this.ktx2Loader,
                meshoptDecoder: this.meshoptDecoder,
            })
            parser.fileLoader.setRequestHeader(this.requestHeader)

            for (let i = 0; i < this.pluginCallbacks.length; i++) {
                const plugin = this.pluginCallbacks[i](parser)
                plugins[plugin.name] = plugin // Workaround to avoid determining as unknown extension
                // in addUnknownExtensionsToUserData().
                // Remove this workaround if we move all the existing
                // extension handlers to plugin system

                extensions[plugin.name] = true
            }

            if (json.extensionsUsed) {
                for (let i = 0; i < json.extensionsUsed.length; ++i) {
                    const extensionName = json.extensionsUsed[i]
                    const extensionsRequired = json.extensionsRequired || []

                    switch (extensionName) {
                        case EXTENSIONS.KHR_MATERIALS_UNLIT:
                            extensions[extensionName] = new GLTFMaterialsUnlitExtension()
                            break

                        case EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS:
                            extensions[extensionName] = new GLTFMaterialsPbrSpecularGlossinessExtension()
                            break

                        case EXTENSIONS.KHR_DRACO_MESH_COMPRESSION:
                            extensions[extensionName] = new GLTFDracoMeshCompressionExtension(json, this.dracoLoader)
                            break

                        case EXTENSIONS.KHR_TEXTURE_TRANSFORM:
                            extensions[extensionName] = new GLTFTextureTransformExtension()
                            break

                        case EXTENSIONS.KHR_MESH_QUANTIZATION:
                            extensions[extensionName] = new GLTFMeshQuantizationExtension()
                            break

                        default:
                            if (extensionsRequired.indexOf(extensionName) >= 0 && plugins[extensionName] === undefined) {
                                console.warn('THREE.GLTFLoader: Unknown extension "' + extensionName + '".')
                            }
                    }
                }
            }

            parser.setExtensions(extensions)
            parser.setPlugins(plugins)
            parser.parse(onLoad, onError)
        }

        parseAsync(data, path) {
            const scope = this
            return new Promise(function (resolve, reject) {
                scope.parse(data, path, resolve, reject)
            })
        }
    }
    /* GLTFREGISTRY */

    function GLTFRegistry() {
        let objects = {}
        return {
            get: function (key) {
                return objects[key]
            },
            add: function (key, object) {
                objects[key] = object
            },
            remove: function (key) {
                delete objects[key]
            },
            removeAll: function () {
                objects = {}
            },
        }
    }
    /*********************************/

    /********** EXTENSIONS ***********/

    /*********************************/

    const EXTENSIONS = {
        KHR_BINARY_GLTF: 'KHR_binary_glTF',
        KHR_DRACO_MESH_COMPRESSION: 'KHR_draco_mesh_compression',
        KHR_LIGHTS_PUNCTUAL: 'KHR_lights_punctual',
        KHR_MATERIALS_CLEARCOAT: 'KHR_materials_clearcoat',
        KHR_MATERIALS_IOR: 'KHR_materials_ior',
        KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS: 'KHR_materials_pbrSpecularGlossiness',
        KHR_MATERIALS_SHEEN: 'KHR_materials_sheen',
        KHR_MATERIALS_SPECULAR: 'KHR_materials_specular',
        KHR_MATERIALS_TRANSMISSION: 'KHR_materials_transmission',
        KHR_MATERIALS_IRIDESCENCE: 'KHR_materials_iridescence',
        KHR_MATERIALS_UNLIT: 'KHR_materials_unlit',
        KHR_MATERIALS_VOLUME: 'KHR_materials_volume',
        KHR_TEXTURE_BASISU: 'KHR_texture_basisu',
        KHR_TEXTURE_TRANSFORM: 'KHR_texture_transform',
        KHR_MESH_QUANTIZATION: 'KHR_mesh_quantization',
        KHR_MATERIALS_EMISSIVE_STRENGTH: 'KHR_materials_emissive_strength',
        EXT_TEXTURE_WEBP: 'EXT_texture_webp',
        EXT_MESHOPT_COMPRESSION: 'EXT_meshopt_compression',
    }
    /**
     * Punctual Lights Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual
     */

    class GLTFLightsExtension {
        constructor(parser) {
            this.parser = parser
            this.name = EXTENSIONS.KHR_LIGHTS_PUNCTUAL // THREE.Object3D instance caches

            this.cache = {
                refs: {},
                uses: {},
            }
        }

        _markDefs() {
            const parser = this.parser
            const nodeDefs = this.parser.json.nodes || []

            for (let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex++) {
                const nodeDef = nodeDefs[nodeIndex]

                if (nodeDef.extensions && nodeDef.extensions[this.name] && nodeDef.extensions[this.name].light !== undefined) {
                    parser._addNodeRef(this.cache, nodeDef.extensions[this.name].light)
                }
            }
        }

        _loadLight(lightIndex) {
            const parser = this.parser
            const cacheKey = 'light:' + lightIndex
            let dependency = parser.cache.get(cacheKey)
            if (dependency) return dependency
            const json = parser.json
            const extensions = (json.extensions && json.extensions[this.name]) || {}
            const lightDefs = extensions.lights || []
            const lightDef = lightDefs[lightIndex]
            let lightNode
            const color = new THREE.Color(0xffffff)
            if (lightDef.color !== undefined) color.fromArray(lightDef.color)
            const range = lightDef.range !== undefined ? lightDef.range : 0

            switch (lightDef.type) {
                case 'directional':
                    lightNode = new THREE.DirectionalLight(color)
                    lightNode.target.position.set(0, 0, -1)
                    lightNode.add(lightNode.target)
                    break

                case 'point':
                    lightNode = new THREE.PointLight(color)
                    lightNode.distance = range
                    break

                case 'spot':
                    lightNode = new THREE.SpotLight(color)
                    lightNode.distance = range // Handle spotlight properties.

                    lightDef.spot = lightDef.spot || {}
                    lightDef.spot.innerConeAngle = lightDef.spot.innerConeAngle !== undefined ? lightDef.spot.innerConeAngle : 0
                    lightDef.spot.outerConeAngle = lightDef.spot.outerConeAngle !== undefined ? lightDef.spot.outerConeAngle : Math.PI / 4.0
                    lightNode.angle = lightDef.spot.outerConeAngle
                    lightNode.penumbra = 1.0 - lightDef.spot.innerConeAngle / lightDef.spot.outerConeAngle
                    lightNode.target.position.set(0, 0, -1)
                    lightNode.add(lightNode.target)
                    break

                default:
                    throw new Error('THREE.GLTFLoader: Unexpected light type: ' + lightDef.type)
            } // Some lights (e.g. spot) default to a position other than the origin. Reset the position
            // here, because node-level parsing will only override position if explicitly specified.

            lightNode.position.set(0, 0, 0)
            lightNode.decay = 2
            if (lightDef.intensity !== undefined) lightNode.intensity = lightDef.intensity
            lightNode.name = parser.createUniqueName(lightDef.name || 'light_' + lightIndex)
            dependency = Promise.resolve(lightNode)
            parser.cache.add(cacheKey, dependency)
            return dependency
        }

        createNodeAttachment(nodeIndex) {
            const self = this
            const parser = this.parser
            const json = parser.json
            const nodeDef = json.nodes[nodeIndex]
            const lightDef = (nodeDef.extensions && nodeDef.extensions[this.name]) || {}
            const lightIndex = lightDef.light
            if (lightIndex === undefined) return null
            return this._loadLight(lightIndex).then(function (light) {
                return parser._getNodeRef(self.cache, lightIndex, light)
            })
        }
    }
    /**
     * Unlit Materials Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_unlit
     */

    class GLTFMaterialsUnlitExtension {
        constructor() {
            this.name = EXTENSIONS.KHR_MATERIALS_UNLIT
        }

        getMaterialType() {
            return THREE.MeshBasicMaterial
        }

        extendParams(materialParams, materialDef, parser) {
            const pending = []
            materialParams.color = new THREE.Color(1.0, 1.0, 1.0)
            materialParams.opacity = 1.0
            const metallicRoughness = materialDef.pbrMetallicRoughness

            if (metallicRoughness) {
                if (Array.isArray(metallicRoughness.baseColorFactor)) {
                    const array = metallicRoughness.baseColorFactor
                    materialParams.color.fromArray(array)
                    materialParams.opacity = array[3]
                }

                if (metallicRoughness.baseColorTexture !== undefined) {
                    pending.push(parser.assignTexture(materialParams, 'map', metallicRoughness.baseColorTexture, THREE.sRGBEncoding))
                }
            }

            return Promise.all(pending)
        }
    }
    /**
     * Materials Emissive Strength Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/blob/5768b3ce0ef32bc39cdf1bef10b948586635ead3/extensions/2.0/Khronos/KHR_materials_emissive_strength/README.md
     */

    class GLTFMaterialsEmissiveStrengthExtension {
        constructor(parser) {
            this.parser = parser
            this.name = EXTENSIONS.KHR_MATERIALS_EMISSIVE_STRENGTH
        }

        extendMaterialParams(materialIndex, materialParams) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]

            if (!materialDef.extensions || !materialDef.extensions[this.name]) {
                return Promise.resolve()
            }

            const emissiveStrength = materialDef.extensions[this.name].emissiveStrength

            if (emissiveStrength !== undefined) {
                materialParams.emissiveIntensity = emissiveStrength
            }

            return Promise.resolve()
        }
    }
    /**
     * Clearcoat Materials Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_clearcoat
     */

    class GLTFMaterialsClearcoatExtension {
        constructor(parser) {
            this.parser = parser
            this.name = EXTENSIONS.KHR_MATERIALS_CLEARCOAT
        }

        getMaterialType(materialIndex) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]
            if (!materialDef.extensions || !materialDef.extensions[this.name]) return null
            return THREE.MeshPhysicalMaterial
        }

        extendMaterialParams(materialIndex, materialParams) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]

            if (!materialDef.extensions || !materialDef.extensions[this.name]) {
                return Promise.resolve()
            }

            const pending = []
            const extension = materialDef.extensions[this.name]

            if (extension.clearcoatFactor !== undefined) {
                materialParams.clearcoat = extension.clearcoatFactor
            }

            if (extension.clearcoatTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'clearcoatMap', extension.clearcoatTexture))
            }

            if (extension.clearcoatRoughnessFactor !== undefined) {
                materialParams.clearcoatRoughness = extension.clearcoatRoughnessFactor
            }

            if (extension.clearcoatRoughnessTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'clearcoatRoughnessMap', extension.clearcoatRoughnessTexture))
            }

            if (extension.clearcoatNormalTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'clearcoatNormalMap', extension.clearcoatNormalTexture))

                if (extension.clearcoatNormalTexture.scale !== undefined) {
                    const scale = extension.clearcoatNormalTexture.scale
                    materialParams.clearcoatNormalScale = new THREE.Vector2(scale, scale)
                }
            }

            return Promise.all(pending)
        }
    }
    /**
     * Iridescence Materials Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_iridescence
     */

    class GLTFMaterialsIridescenceExtension {
        constructor(parser) {
            this.parser = parser
            this.name = EXTENSIONS.KHR_MATERIALS_IRIDESCENCE
        }

        getMaterialType(materialIndex) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]
            if (!materialDef.extensions || !materialDef.extensions[this.name]) return null
            return THREE.MeshPhysicalMaterial
        }

        extendMaterialParams(materialIndex, materialParams) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]

            if (!materialDef.extensions || !materialDef.extensions[this.name]) {
                return Promise.resolve()
            }

            const pending = []
            const extension = materialDef.extensions[this.name]

            if (extension.iridescenceFactor !== undefined) {
                materialParams.iridescence = extension.iridescenceFactor
            }

            if (extension.iridescenceTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'iridescenceMap', extension.iridescenceTexture))
            }

            if (extension.iridescenceIor !== undefined) {
                materialParams.iridescenceIOR = extension.iridescenceIor
            }

            if (materialParams.iridescenceThicknessRange === undefined) {
                materialParams.iridescenceThicknessRange = [100, 400]
            }

            if (extension.iridescenceThicknessMinimum !== undefined) {
                materialParams.iridescenceThicknessRange[0] = extension.iridescenceThicknessMinimum
            }

            if (extension.iridescenceThicknessMaximum !== undefined) {
                materialParams.iridescenceThicknessRange[1] = extension.iridescenceThicknessMaximum
            }

            if (extension.iridescenceThicknessTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'iridescenceThicknessMap', extension.iridescenceThicknessTexture))
            }

            return Promise.all(pending)
        }
    }
    /**
     * Sheen Materials Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_sheen
     */

    class GLTFMaterialsSheenExtension {
        constructor(parser) {
            this.parser = parser
            this.name = EXTENSIONS.KHR_MATERIALS_SHEEN
        }

        getMaterialType(materialIndex) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]
            if (!materialDef.extensions || !materialDef.extensions[this.name]) return null
            return THREE.MeshPhysicalMaterial
        }

        extendMaterialParams(materialIndex, materialParams) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]

            if (!materialDef.extensions || !materialDef.extensions[this.name]) {
                return Promise.resolve()
            }

            const pending = []
            materialParams.sheenColor = new THREE.Color(0, 0, 0)
            materialParams.sheenRoughness = 0
            materialParams.sheen = 1
            const extension = materialDef.extensions[this.name]

            if (extension.sheenColorFactor !== undefined) {
                materialParams.sheenColor.fromArray(extension.sheenColorFactor)
            }

            if (extension.sheenRoughnessFactor !== undefined) {
                materialParams.sheenRoughness = extension.sheenRoughnessFactor
            }

            if (extension.sheenColorTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'sheenColorMap', extension.sheenColorTexture, THREE.sRGBEncoding))
            }

            if (extension.sheenRoughnessTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'sheenRoughnessMap', extension.sheenRoughnessTexture))
            }

            return Promise.all(pending)
        }
    }
    /**
     * Transmission Materials Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_transmission
     * Draft: https://github.com/KhronosGroup/glTF/pull/1698
     */

    class GLTFMaterialsTransmissionExtension {
        constructor(parser) {
            this.parser = parser
            this.name = EXTENSIONS.KHR_MATERIALS_TRANSMISSION
        }

        getMaterialType(materialIndex) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]
            if (!materialDef.extensions || !materialDef.extensions[this.name]) return null
            return THREE.MeshPhysicalMaterial
        }

        extendMaterialParams(materialIndex, materialParams) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]

            if (!materialDef.extensions || !materialDef.extensions[this.name]) {
                return Promise.resolve()
            }

            const pending = []
            const extension = materialDef.extensions[this.name]

            if (extension.transmissionFactor !== undefined) {
                materialParams.transmission = extension.transmissionFactor
            }

            if (extension.transmissionTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'transmissionMap', extension.transmissionTexture))
            }

            return Promise.all(pending)
        }
    }
    /**
     * Materials Volume Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_volume
     */

    class GLTFMaterialsVolumeExtension {
        constructor(parser) {
            this.parser = parser
            this.name = EXTENSIONS.KHR_MATERIALS_VOLUME
        }

        getMaterialType(materialIndex) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]
            if (!materialDef.extensions || !materialDef.extensions[this.name]) return null
            return THREE.MeshPhysicalMaterial
        }

        extendMaterialParams(materialIndex, materialParams) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]

            if (!materialDef.extensions || !materialDef.extensions[this.name]) {
                return Promise.resolve()
            }

            const pending = []
            const extension = materialDef.extensions[this.name]
            materialParams.thickness = extension.thicknessFactor !== undefined ? extension.thicknessFactor : 0

            if (extension.thicknessTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'thicknessMap', extension.thicknessTexture))
            }

            materialParams.attenuationDistance = extension.attenuationDistance || 0
            const colorArray = extension.attenuationColor || [1, 1, 1]
            materialParams.attenuationColor = new THREE.Color(colorArray[0], colorArray[1], colorArray[2])
            return Promise.all(pending)
        }
    }
    /**
     * Materials ior Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_ior
     */

    class GLTFMaterialsIorExtension {
        constructor(parser) {
            this.parser = parser
            this.name = EXTENSIONS.KHR_MATERIALS_IOR
        }

        getMaterialType(materialIndex) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]
            if (!materialDef.extensions || !materialDef.extensions[this.name]) return null
            return THREE.MeshPhysicalMaterial
        }

        extendMaterialParams(materialIndex, materialParams) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]

            if (!materialDef.extensions || !materialDef.extensions[this.name]) {
                return Promise.resolve()
            }

            const extension = materialDef.extensions[this.name]
            materialParams.ior = extension.ior !== undefined ? extension.ior : 1.5
            return Promise.resolve()
        }
    }
    /**
     * Materials specular Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_specular
     */

    class GLTFMaterialsSpecularExtension {
        constructor(parser) {
            this.parser = parser
            this.name = EXTENSIONS.KHR_MATERIALS_SPECULAR
        }

        getMaterialType(materialIndex) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]
            if (!materialDef.extensions || !materialDef.extensions[this.name]) return null
            return THREE.MeshPhysicalMaterial
        }

        extendMaterialParams(materialIndex, materialParams) {
            const parser = this.parser
            const materialDef = parser.json.materials[materialIndex]

            if (!materialDef.extensions || !materialDef.extensions[this.name]) {
                return Promise.resolve()
            }

            const pending = []
            const extension = materialDef.extensions[this.name]
            materialParams.specularIntensity = extension.specularFactor !== undefined ? extension.specularFactor : 1.0

            if (extension.specularTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'specularIntensityMap', extension.specularTexture))
            }

            const colorArray = extension.specularColorFactor || [1, 1, 1]
            materialParams.specularColor = new THREE.Color(colorArray[0], colorArray[1], colorArray[2])

            if (extension.specularColorTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'specularColorMap', extension.specularColorTexture, THREE.sRGBEncoding))
            }

            return Promise.all(pending)
        }
    }
    /**
     * BasisU THREE.Texture Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_texture_basisu
     */

    class GLTFTextureBasisUExtension {
        constructor(parser) {
            this.parser = parser
            this.name = EXTENSIONS.KHR_TEXTURE_BASISU
        }

        loadTexture(textureIndex) {
            const parser = this.parser
            const json = parser.json
            const textureDef = json.textures[textureIndex]

            if (!textureDef.extensions || !textureDef.extensions[this.name]) {
                return null
            }

            const extension = textureDef.extensions[this.name]
            const loader = parser.options.ktx2Loader

            if (!loader) {
                if (json.extensionsRequired && json.extensionsRequired.indexOf(this.name) >= 0) {
                    throw new Error('THREE.GLTFLoader: setKTX2Loader must be called before loading KTX2 textures')
                } else {
                    // Assumes that the extension is optional and that a fallback texture is present
                    return null
                }
            }

            return parser.loadTextureImage(textureIndex, extension.source, loader)
        }
    }
    /**
     * WebP THREE.Texture Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_texture_webp
     */

    class GLTFTextureWebPExtension {
        constructor(parser) {
            this.parser = parser
            this.name = EXTENSIONS.EXT_TEXTURE_WEBP
            this.isSupported = null
        }

        loadTexture(textureIndex) {
            const name = this.name
            const parser = this.parser
            const json = parser.json
            const textureDef = json.textures[textureIndex]

            if (!textureDef.extensions || !textureDef.extensions[name]) {
                return null
            }

            const extension = textureDef.extensions[name]
            const source = json.images[extension.source]
            let loader = parser.textureLoader

            if (source.uri) {
                const handler = parser.options.manager.getHandler(source.uri)
                if (handler !== null) loader = handler
            }

            return this.detectSupport().then(function (isSupported) {
                if (isSupported) return parser.loadTextureImage(textureIndex, extension.source, loader)

                if (json.extensionsRequired && json.extensionsRequired.indexOf(name) >= 0) {
                    throw new Error('THREE.GLTFLoader: WebP required by asset but unsupported.')
                } // Fall back to PNG or JPEG.

                return parser.loadTexture(textureIndex)
            })
        }

        detectSupport() {
            if (!this.isSupported) {
                this.isSupported = new Promise(function (resolve) {
                    const image = new Image() // Lossy test image. Support for lossy images doesn't guarantee support for all
                    // WebP images, unfortunately.

                    image.src = 'data:image/webp;base64,UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA'

                    image.onload = image.onerror = function () {
                        resolve(image.height === 1)
                    }
                })
            }

            return this.isSupported
        }
    }
    /**
     * meshopt BufferView Compression Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_meshopt_compression
     */

    class GLTFMeshoptCompression {
        constructor(parser) {
            this.name = EXTENSIONS.EXT_MESHOPT_COMPRESSION
            this.parser = parser
        }

        loadBufferView(index) {
            const json = this.parser.json
            const bufferView = json.bufferViews[index]

            if (bufferView.extensions && bufferView.extensions[this.name]) {
                const extensionDef = bufferView.extensions[this.name]
                const buffer = this.parser.getDependency('buffer', extensionDef.buffer)
                const decoder = this.parser.options.meshoptDecoder

                if (!decoder || !decoder.supported) {
                    if (json.extensionsRequired && json.extensionsRequired.indexOf(this.name) >= 0) {
                        throw new Error('THREE.GLTFLoader: setMeshoptDecoder must be called before loading compressed files')
                    } else {
                        // Assumes that the extension is optional and that fallback buffer data is present
                        return null
                    }
                }

                return buffer.then(function (res) {
                    const byteOffset = extensionDef.byteOffset || 0
                    const byteLength = extensionDef.byteLength || 0
                    const count = extensionDef.count
                    const stride = extensionDef.byteStride
                    const source = new Uint8Array(res, byteOffset, byteLength)

                    if (decoder.decodeGltfBufferAsync) {
                        return decoder.decodeGltfBufferAsync(count, stride, source, extensionDef.mode, extensionDef.filter).then(function (res) {
                            return res.buffer
                        })
                    } else {
                        // Support for MeshoptDecoder 0.18 or earlier, without decodeGltfBufferAsync
                        return decoder.ready.then(function () {
                            const result = new ArrayBuffer(count * stride)
                            decoder.decodeGltfBuffer(new Uint8Array(result), count, stride, source, extensionDef.mode, extensionDef.filter)
                            return result
                        })
                    }
                })
            } else {
                return null
            }
        }
    }
    /* BINARY EXTENSION */

    const BINARY_EXTENSION_HEADER_MAGIC = 'glTF'
    const BINARY_EXTENSION_HEADER_LENGTH = 12
    const BINARY_EXTENSION_CHUNK_TYPES = {
        JSON: 0x4e4f534a,
        BIN: 0x004e4942,
    }

    class GLTFBinaryExtension {
        constructor(data) {
            this.name = EXTENSIONS.KHR_BINARY_GLTF
            this.content = null
            this.body = null
            const headerView = new DataView(data, 0, BINARY_EXTENSION_HEADER_LENGTH)
            this.header = {
                magic: THREE.LoaderUtils.decodeText(new Uint8Array(data.slice(0, 4))),
                version: headerView.getUint32(4, true),
                length: headerView.getUint32(8, true),
            }

            if (this.header.magic !== BINARY_EXTENSION_HEADER_MAGIC) {
                throw new Error('THREE.GLTFLoader: Unsupported glTF-Binary header.')
            } else if (this.header.version < 2.0) {
                throw new Error('THREE.GLTFLoader: Legacy binary file detected.')
            }

            const chunkContentsLength = this.header.length - BINARY_EXTENSION_HEADER_LENGTH
            const chunkView = new DataView(data, BINARY_EXTENSION_HEADER_LENGTH)
            let chunkIndex = 0

            while (chunkIndex < chunkContentsLength) {
                const chunkLength = chunkView.getUint32(chunkIndex, true)
                chunkIndex += 4
                const chunkType = chunkView.getUint32(chunkIndex, true)
                chunkIndex += 4

                if (chunkType === BINARY_EXTENSION_CHUNK_TYPES.JSON) {
                    const contentArray = new Uint8Array(data, BINARY_EXTENSION_HEADER_LENGTH + chunkIndex, chunkLength)
                    this.content = THREE.LoaderUtils.decodeText(contentArray)
                } else if (chunkType === BINARY_EXTENSION_CHUNK_TYPES.BIN) {
                    const byteOffset = BINARY_EXTENSION_HEADER_LENGTH + chunkIndex
                    this.body = data.slice(byteOffset, byteOffset + chunkLength)
                } // Clients must ignore chunks with unknown types.

                chunkIndex += chunkLength
            }

            if (this.content === null) {
                throw new Error('THREE.GLTFLoader: JSON content not found.')
            }
        }
    }
    /**
     * DRACO THREE.Mesh Compression Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_draco_mesh_compression
     */

    class GLTFDracoMeshCompressionExtension {
        constructor(json, dracoLoader) {
            if (!dracoLoader) {
                throw new Error('THREE.GLTFLoader: No DRACOLoader instance provided.')
            }

            this.name = EXTENSIONS.KHR_DRACO_MESH_COMPRESSION
            this.json = json
            this.dracoLoader = dracoLoader
            this.dracoLoader.preload()
        }

        decodePrimitive(primitive, parser) {
            const json = this.json
            const dracoLoader = this.dracoLoader
            const bufferViewIndex = primitive.extensions[this.name].bufferView
            const gltfAttributeMap = primitive.extensions[this.name].attributes
            const threeAttributeMap = {}
            const attributeNormalizedMap = {}
            const attributeTypeMap = {}

            for (const attributeName in gltfAttributeMap) {
                const threeAttributeName = ATTRIBUTES[attributeName] || attributeName.toLowerCase()
                threeAttributeMap[threeAttributeName] = gltfAttributeMap[attributeName]
            }

            for (const attributeName in primitive.attributes) {
                const threeAttributeName = ATTRIBUTES[attributeName] || attributeName.toLowerCase()

                if (gltfAttributeMap[attributeName] !== undefined) {
                    const accessorDef = json.accessors[primitive.attributes[attributeName]]
                    const componentType = WEBGL_COMPONENT_TYPES[accessorDef.componentType]
                    attributeTypeMap[threeAttributeName] = componentType.name
                    attributeNormalizedMap[threeAttributeName] = accessorDef.normalized === true
                }
            }

            return parser.getDependency('bufferView', bufferViewIndex).then(function (bufferView) {
                return new Promise(function (resolve) {
                    dracoLoader.decodeDracoFile(
                        bufferView,
                        function (geometry) {
                            for (const attributeName in geometry.attributes) {
                                const attribute = geometry.attributes[attributeName]
                                const normalized = attributeNormalizedMap[attributeName]
                                if (normalized !== undefined) attribute.normalized = normalized
                            }

                            resolve(geometry)
                        },
                        threeAttributeMap,
                        attributeTypeMap
                    )
                })
            })
        }
    }
    /**
     * THREE.Texture Transform Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_texture_transform
     */

    class GLTFTextureTransformExtension {
        constructor() {
            this.name = EXTENSIONS.KHR_TEXTURE_TRANSFORM
        }

        extendTexture(texture, transform) {
            if (transform.texCoord !== undefined) {
                console.warn('THREE.GLTFLoader: Custom UV sets in "' + this.name + '" extension not yet supported.')
            }

            if (transform.offset === undefined && transform.rotation === undefined && transform.scale === undefined) {
                // See https://github.com/mrdoob/three.js/issues/21819.
                return texture
            }

            texture = texture.clone()

            if (transform.offset !== undefined) {
                texture.offset.fromArray(transform.offset)
            }

            if (transform.rotation !== undefined) {
                texture.rotation = transform.rotation
            }

            if (transform.scale !== undefined) {
                texture.repeat.fromArray(transform.scale)
            }

            texture.needsUpdate = true
            return texture
        }
    }
    /**
     * Specular-Glossiness Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Archived/KHR_materials_pbrSpecularGlossiness
     */

    /**
     * A sub class of StandardMaterial with some of the functionality
     * changed via the `onBeforeCompile` callback
     * @pailhead
     */

    class GLTFMeshStandardSGMaterial extends THREE.MeshStandardMaterial {
        constructor(params) {
            super()
            this.isGLTFSpecularGlossinessMaterial = true //various chunks that need replacing

            const specularMapParsFragmentChunk = ['#ifdef USE_SPECULARMAP', '	uniform sampler2D specularMap;', '#endif'].join('\n')
            const glossinessMapParsFragmentChunk = ['#ifdef USE_GLOSSINESSMAP', '	uniform sampler2D glossinessMap;', '#endif'].join('\n')
            const specularMapFragmentChunk = [
                'vec3 specularFactor = specular;',
                '#ifdef USE_SPECULARMAP',
                '	vec4 texelSpecular = texture2D( specularMap, vUv );',
                '	// reads channel RGB, compatible with a glTF Specular-Glossiness (RGBA) texture',
                '	specularFactor *= texelSpecular.rgb;',
                '#endif',
            ].join('\n')
            const glossinessMapFragmentChunk = [
                'float glossinessFactor = glossiness;',
                '#ifdef USE_GLOSSINESSMAP',
                '	vec4 texelGlossiness = texture2D( glossinessMap, vUv );',
                '	// reads channel A, compatible with a glTF Specular-Glossiness (RGBA) texture',
                '	glossinessFactor *= texelGlossiness.a;',
                '#endif',
            ].join('\n')
            const lightPhysicalFragmentChunk = [
                'PhysicalMaterial material;',
                'material.diffuseColor = diffuseColor.rgb * ( 1. - max( specularFactor.r, max( specularFactor.g, specularFactor.b ) ) );',
                'vec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );',
                'float geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );',
                'material.roughness = max( 1.0 - glossinessFactor, 0.0525 ); // 0.0525 corresponds to the base mip of a 256 cubemap.',
                'material.roughness += geometryRoughness;',
                'material.roughness = min( material.roughness, 1.0 );',
                'material.specularColor = specularFactor;',
            ].join('\n')
            const uniforms = {
                specular: {
                    value: new THREE.Color().setHex(0xffffff),
                },
                glossiness: {
                    value: 1,
                },
                specularMap: {
                    value: null,
                },
                glossinessMap: {
                    value: null,
                },
            }
            this._extraUniforms = uniforms

            this.onBeforeCompile = function (shader) {
                for (const uniformName in uniforms) {
                    shader.uniforms[uniformName] = uniforms[uniformName]
                }

                shader.fragmentShader = shader.fragmentShader
                    .replace('uniform float roughness;', 'uniform vec3 specular;')
                    .replace('uniform float metalness;', 'uniform float glossiness;')
                    .replace('#include <roughnessmap_pars_fragment>', specularMapParsFragmentChunk)
                    .replace('#include <metalnessmap_pars_fragment>', glossinessMapParsFragmentChunk)
                    .replace('#include <roughnessmap_fragment>', specularMapFragmentChunk)
                    .replace('#include <metalnessmap_fragment>', glossinessMapFragmentChunk)
                    .replace('#include <lights_physical_fragment>', lightPhysicalFragmentChunk)
            }

            Object.defineProperties(this, {
                specular: {
                    get: function () {
                        return uniforms.specular.value
                    },
                    set: function (v) {
                        uniforms.specular.value = v
                    },
                },
                specularMap: {
                    get: function () {
                        return uniforms.specularMap.value
                    },
                    set: function (v) {
                        uniforms.specularMap.value = v

                        if (v) {
                            this.defines.USE_SPECULARMAP = '' // USE_UV is set by the renderer for specular maps
                        } else {
                            delete this.defines.USE_SPECULARMAP
                        }
                    },
                },
                glossiness: {
                    get: function () {
                        return uniforms.glossiness.value
                    },
                    set: function (v) {
                        uniforms.glossiness.value = v
                    },
                },
                glossinessMap: {
                    get: function () {
                        return uniforms.glossinessMap.value
                    },
                    set: function (v) {
                        uniforms.glossinessMap.value = v

                        if (v) {
                            this.defines.USE_GLOSSINESSMAP = ''
                            this.defines.USE_UV = ''
                        } else {
                            delete this.defines.USE_GLOSSINESSMAP
                            delete this.defines.USE_UV
                        }
                    },
                },
            })
            delete this.metalness
            delete this.roughness
            delete this.metalnessMap
            delete this.roughnessMap
            this.setValues(params)
        }

        copy(source) {
            super.copy(source)
            this.specularMap = source.specularMap
            this.specular.copy(source.specular)
            this.glossinessMap = source.glossinessMap
            this.glossiness = source.glossiness
            delete this.metalness
            delete this.roughness
            delete this.metalnessMap
            delete this.roughnessMap
            return this
        }
    }

    class GLTFMaterialsPbrSpecularGlossinessExtension {
        constructor() {
            this.name = EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS
            this.specularGlossinessParams = [
                'color',
                'map',
                'lightMap',
                'lightMapIntensity',
                'aoMap',
                'aoMapIntensity',
                'emissive',
                'emissiveIntensity',
                'emissiveMap',
                'bumpMap',
                'bumpScale',
                'normalMap',
                'normalMapType',
                'displacementMap',
                'displacementScale',
                'displacementBias',
                'specularMap',
                'specular',
                'glossinessMap',
                'glossiness',
                'alphaMap',
                'envMap',
                'envMapIntensity',
            ]
        }

        getMaterialType() {
            return GLTFMeshStandardSGMaterial
        }

        extendParams(materialParams, materialDef, parser) {
            const pbrSpecularGlossiness = materialDef.extensions[this.name]
            materialParams.color = new THREE.Color(1.0, 1.0, 1.0)
            materialParams.opacity = 1.0
            const pending = []

            if (Array.isArray(pbrSpecularGlossiness.diffuseFactor)) {
                const array = pbrSpecularGlossiness.diffuseFactor
                materialParams.color.fromArray(array)
                materialParams.opacity = array[3]
            }

            if (pbrSpecularGlossiness.diffuseTexture !== undefined) {
                pending.push(parser.assignTexture(materialParams, 'map', pbrSpecularGlossiness.diffuseTexture, THREE.sRGBEncoding))
            }

            materialParams.emissive = new THREE.Color(0.0, 0.0, 0.0)
            materialParams.glossiness = pbrSpecularGlossiness.glossinessFactor !== undefined ? pbrSpecularGlossiness.glossinessFactor : 1.0
            materialParams.specular = new THREE.Color(1.0, 1.0, 1.0)

            if (Array.isArray(pbrSpecularGlossiness.specularFactor)) {
                materialParams.specular.fromArray(pbrSpecularGlossiness.specularFactor)
            }

            if (pbrSpecularGlossiness.specularGlossinessTexture !== undefined) {
                const specGlossMapDef = pbrSpecularGlossiness.specularGlossinessTexture
                pending.push(parser.assignTexture(materialParams, 'glossinessMap', specGlossMapDef))
                pending.push(parser.assignTexture(materialParams, 'specularMap', specGlossMapDef, THREE.sRGBEncoding))
            }

            return Promise.all(pending)
        }

        createMaterial(materialParams) {
            const material = new GLTFMeshStandardSGMaterial(materialParams)
            material.fog = true
            material.color = materialParams.color
            material.map = materialParams.map === undefined ? null : materialParams.map
            material.lightMap = null
            material.lightMapIntensity = 1.0
            material.aoMap = materialParams.aoMap === undefined ? null : materialParams.aoMap
            material.aoMapIntensity = 1.0
            material.emissive = materialParams.emissive
            material.emissiveIntensity = materialParams.emissiveIntensity === undefined ? 1.0 : materialParams.emissiveIntensity
            material.emissiveMap = materialParams.emissiveMap === undefined ? null : materialParams.emissiveMap
            material.bumpMap = materialParams.bumpMap === undefined ? null : materialParams.bumpMap
            material.bumpScale = 1
            material.normalMap = materialParams.normalMap === undefined ? null : materialParams.normalMap
            material.normalMapType = THREE.TangentSpaceNormalMap
            if (materialParams.normalScale) material.normalScale = materialParams.normalScale
            material.displacementMap = null
            material.displacementScale = 1
            material.displacementBias = 0
            material.specularMap = materialParams.specularMap === undefined ? null : materialParams.specularMap
            material.specular = materialParams.specular
            material.glossinessMap = materialParams.glossinessMap === undefined ? null : materialParams.glossinessMap
            material.glossiness = materialParams.glossiness
            material.alphaMap = null
            material.envMap = materialParams.envMap === undefined ? null : materialParams.envMap
            material.envMapIntensity = 1.0
            return material
        }
    }
    /**
     * THREE.Mesh Quantization Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_mesh_quantization
     */

    class GLTFMeshQuantizationExtension {
        constructor() {
            this.name = EXTENSIONS.KHR_MESH_QUANTIZATION
        }
    }
    /*********************************/

    /********** INTERPOLATION ********/

    /*********************************/
    // Spline Interpolation
    // Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#appendix-c-spline-interpolation

    class GLTFCubicSplineInterpolant extends THREE.Interpolant {
        constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
            super(parameterPositions, sampleValues, sampleSize, resultBuffer)
        }

        copySampleValue_(index) {
            // Copies a sample value to the result buffer. See description of glTF
            // CUBICSPLINE values layout in interpolate_() function below.
            const result = this.resultBuffer,
                values = this.sampleValues,
                valueSize = this.valueSize,
                offset = index * valueSize * 3 + valueSize

            for (let i = 0; i !== valueSize; i++) {
                result[i] = values[offset + i]
            }

            return result
        }

        interpolate_(i1, t0, t, t1) {
            const result = this.resultBuffer
            const values = this.sampleValues
            const stride = this.valueSize
            const stride2 = stride * 2
            const stride3 = stride * 3
            const td = t1 - t0
            const p = (t - t0) / td
            const pp = p * p
            const ppp = pp * p
            const offset1 = i1 * stride3
            const offset0 = offset1 - stride3
            const s2 = -2 * ppp + 3 * pp
            const s3 = ppp - pp
            const s0 = 1 - s2
            const s1 = s3 - pp + p // Layout of keyframe output values for CUBICSPLINE animations:
            //   [ inTangent_1, splineVertex_1, outTangent_1, inTangent_2, splineVertex_2, ... ]

            for (let i = 0; i !== stride; i++) {
                const p0 = values[offset0 + i + stride] // splineVertex_k

                const m0 = values[offset0 + i + stride2] * td // outTangent_k * (t_k+1 - t_k)

                const p1 = values[offset1 + i + stride] // splineVertex_k+1

                const m1 = values[offset1 + i] * td // inTangent_k+1 * (t_k+1 - t_k)

                result[i] = s0 * p0 + s1 * m0 + s2 * p1 + s3 * m1
            }

            return result
        }
    }

    const _q = new THREE.Quaternion()

    class GLTFCubicSplineQuaternionInterpolant extends GLTFCubicSplineInterpolant {
        interpolate_(i1, t0, t, t1) {
            const result = super.interpolate_(i1, t0, t, t1)

            _q.fromArray(result).normalize().toArray(result)

            return result
        }
    }
    /*********************************/

    /********** INTERNALS ************/

    /*********************************/

    /* CONSTANTS */

    const WEBGL_CONSTANTS = {
        FLOAT: 5126,
        //FLOAT_MAT2: 35674,
        FLOAT_MAT3: 35675,
        FLOAT_MAT4: 35676,
        FLOAT_VEC2: 35664,
        FLOAT_VEC3: 35665,
        FLOAT_VEC4: 35666,
        LINEAR: 9729,
        REPEAT: 10497,
        SAMPLER_2D: 35678,
        POINTS: 0,
        LINES: 1,
        LINE_LOOP: 2,
        LINE_STRIP: 3,
        TRIANGLES: 4,
        TRIANGLE_STRIP: 5,
        TRIANGLE_FAN: 6,
        UNSIGNED_BYTE: 5121,
        UNSIGNED_SHORT: 5123,
    }
    const WEBGL_COMPONENT_TYPES = {
        5120: Int8Array,
        5121: Uint8Array,
        5122: Int16Array,
        5123: Uint16Array,
        5125: Uint32Array,
        5126: Float32Array,
    }
    const WEBGL_FILTERS = {
        9728: THREE.NearestFilter,
        9729: THREE.LinearFilter,
        9984: THREE.NearestMipmapNearestFilter,
        9985: THREE.LinearMipmapNearestFilter,
        9986: THREE.NearestMipmapLinearFilter,
        9987: THREE.LinearMipmapLinearFilter,
    }
    const WEBGL_WRAPPINGS = {
        33071: THREE.ClampToEdgeWrapping,
        33648: THREE.MirroredRepeatWrapping,
        10497: THREE.RepeatWrapping,
    }
    const WEBGL_TYPE_SIZES = {
        SCALAR: 1,
        VEC2: 2,
        VEC3: 3,
        VEC4: 4,
        MAT2: 4,
        MAT3: 9,
        MAT4: 16,
    }
    const ATTRIBUTES = {
        POSITION: 'position',
        NORMAL: 'normal',
        TANGENT: 'tangent',
        TEXCOORD_0: 'uv',
        TEXCOORD_1: 'uv2',
        COLOR_0: 'color',
        WEIGHTS_0: 'skinWeight',
        JOINTS_0: 'skinIndex',
    }
    const PATH_PROPERTIES = {
        scale: 'scale',
        translation: 'position',
        rotation: 'quaternion',
        weights: 'morphTargetInfluences',
    }
    const INTERPOLATION = {
        CUBICSPLINE: undefined,
        // We use a custom interpolant (GLTFCubicSplineInterpolation) for CUBICSPLINE tracks. Each
        // keyframe track will be initialized with a default interpolation type, then modified.
        LINEAR: THREE.InterpolateLinear,
        STEP: THREE.InterpolateDiscrete,
    }
    const ALPHA_MODES = {
        OPAQUE: 'OPAQUE',
        MASK: 'MASK',
        BLEND: 'BLEND',
    }
    /**
     * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#default-material
     */

    function createDefaultMaterial(cache) {
        if (cache['DefaultMaterial'] === undefined) {
            cache['DefaultMaterial'] = new THREE.MeshStandardMaterial({
                color: 0xffffff,
                emissive: 0x000000,
                metalness: 1,
                roughness: 1,
                transparent: false,
                depthTest: true,
                side: THREE.FrontSide,
            })
        }

        return cache['DefaultMaterial']
    }

    function addUnknownExtensionsToUserData(knownExtensions, object, objectDef) {
        // Add unknown glTF extensions to an object's userData.
        for (const name in objectDef.extensions) {
            if (knownExtensions[name] === undefined) {
                object.userData.gltfExtensions = object.userData.gltfExtensions || {}
                object.userData.gltfExtensions[name] = objectDef.extensions[name]
            }
        }
    }
    /**
     * @param {Object3D|Material|BufferGeometry} object
     * @param {GLTF.definition} gltfDef
     */

    function assignExtrasToUserData(object, gltfDef) {
        if (gltfDef.extras !== undefined) {
            if (typeof gltfDef.extras === 'object') {
                Object.assign(object.userData, gltfDef.extras)
            } else {
                console.warn('THREE.GLTFLoader: Ignoring primitive type .extras, ' + gltfDef.extras)
            }
        }
    }
    /**
     * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#morph-targets
     *
     * @param {BufferGeometry} geometry
     * @param {Array<GLTF.Target>} targets
     * @param {GLTFParser} parser
     * @return {Promise<BufferGeometry>}
     */

    function addMorphTargets(geometry, targets, parser) {
        let hasMorphPosition = false
        let hasMorphNormal = false
        let hasMorphColor = false

        for (let i = 0, il = targets.length; i < il; i++) {
            const target = targets[i]
            if (target.POSITION !== undefined) hasMorphPosition = true
            if (target.NORMAL !== undefined) hasMorphNormal = true
            if (target.COLOR_0 !== undefined) hasMorphColor = true
            if (hasMorphPosition && hasMorphNormal && hasMorphColor) break
        }

        if (!hasMorphPosition && !hasMorphNormal && !hasMorphColor) return Promise.resolve(geometry)
        const pendingPositionAccessors = []
        const pendingNormalAccessors = []
        const pendingColorAccessors = []

        for (let i = 0, il = targets.length; i < il; i++) {
            const target = targets[i]

            if (hasMorphPosition) {
                const pendingAccessor = target.POSITION !== undefined ? parser.getDependency('accessor', target.POSITION) : geometry.attributes.position
                pendingPositionAccessors.push(pendingAccessor)
            }

            if (hasMorphNormal) {
                const pendingAccessor = target.NORMAL !== undefined ? parser.getDependency('accessor', target.NORMAL) : geometry.attributes.normal
                pendingNormalAccessors.push(pendingAccessor)
            }

            if (hasMorphColor) {
                const pendingAccessor = target.COLOR_0 !== undefined ? parser.getDependency('accessor', target.COLOR_0) : geometry.attributes.color
                pendingColorAccessors.push(pendingAccessor)
            }
        }

        return Promise.all([Promise.all(pendingPositionAccessors), Promise.all(pendingNormalAccessors), Promise.all(pendingColorAccessors)]).then(function (accessors) {
            const morphPositions = accessors[0]
            const morphNormals = accessors[1]
            const morphColors = accessors[2]
            if (hasMorphPosition) geometry.morphAttributes.position = morphPositions
            if (hasMorphNormal) geometry.morphAttributes.normal = morphNormals
            if (hasMorphColor) geometry.morphAttributes.color = morphColors
            geometry.morphTargetsRelative = true
            return geometry
        })
    }
    /**
     * @param {Mesh} mesh
     * @param {GLTF.Mesh} meshDef
     */

    function updateMorphTargets(mesh, meshDef) {
        mesh.updateMorphTargets()

        if (meshDef.weights !== undefined) {
            for (let i = 0, il = meshDef.weights.length; i < il; i++) {
                mesh.morphTargetInfluences[i] = meshDef.weights[i]
            }
        } // .extras has user-defined data, so check that .extras.targetNames is an array.

        if (meshDef.extras && Array.isArray(meshDef.extras.targetNames)) {
            const targetNames = meshDef.extras.targetNames

            if (mesh.morphTargetInfluences.length === targetNames.length) {
                mesh.morphTargetDictionary = {}

                for (let i = 0, il = targetNames.length; i < il; i++) {
                    mesh.morphTargetDictionary[targetNames[i]] = i
                }
            } else {
                console.warn('THREE.GLTFLoader: Invalid extras.targetNames length. Ignoring names.')
            }
        }
    }

    function createPrimitiveKey(primitiveDef) {
        const dracoExtension = primitiveDef.extensions && primitiveDef.extensions[EXTENSIONS.KHR_DRACO_MESH_COMPRESSION]
        let geometryKey

        if (dracoExtension) {
            geometryKey = 'draco:' + dracoExtension.bufferView + ':' + dracoExtension.indices + ':' + createAttributesKey(dracoExtension.attributes)
        } else {
            geometryKey = primitiveDef.indices + ':' + createAttributesKey(primitiveDef.attributes) + ':' + primitiveDef.mode
        }

        return geometryKey
    }

    function createAttributesKey(attributes) {
        let attributesKey = ''
        const keys = Object.keys(attributes).sort()

        for (let i = 0, il = keys.length; i < il; i++) {
            attributesKey += keys[i] + ':' + attributes[keys[i]] + ';'
        }

        return attributesKey
    }

    function getNormalizedComponentScale(constructor) {
        // Reference:
        // https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_mesh_quantization#encoding-quantized-data
        switch (constructor) {
            case Int8Array:
                return 1 / 127

            case Uint8Array:
                return 1 / 255

            case Int16Array:
                return 1 / 32767

            case Uint16Array:
                return 1 / 65535

            default:
                throw new Error('THREE.GLTFLoader: Unsupported normalized accessor component type.')
        }
    }

    function getImageURIMimeType(uri) {
        if (uri.search(/\.jpe?g($|\?)/i) > 0 || uri.search(/^data\:image\/jpeg/) === 0) return 'image/jpeg'
        if (uri.search(/\.webp($|\?)/i) > 0 || uri.search(/^data\:image\/webp/) === 0) return 'image/webp'
        return 'image/png'
    }
    /* GLTF PARSER */

    class GLTFParser {
        constructor(json = {}, options = {}) {
            this.json = json
            this.extensions = {}
            this.plugins = {}
            this.options = options // loader object cache

            this.cache = new GLTFRegistry() // associations between Three.js objects and glTF elements

            this.associations = new Map() // THREE.BufferGeometry caching

            this.primitiveCache = {} // THREE.Object3D instance caches

            this.meshCache = {
                refs: {},
                uses: {},
            }
            this.cameraCache = {
                refs: {},
                uses: {},
            }
            this.lightCache = {
                refs: {},
                uses: {},
            }
            this.sourceCache = {}
            this.textureCache = {} // Track node names, to ensure no duplicates

            this.nodeNamesUsed = {} // Use an THREE.ImageBitmapLoader if imageBitmaps are supported. Moves much of the
            // expensive work of uploading a texture to the GPU off the main thread.

            const isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent) === true
            const isFirefox = navigator.userAgent.indexOf('Firefox') > -1
            const firefoxVersion = isFirefox ? navigator.userAgent.match(/Firefox\/([0-9]+)\./)[1] : -1

            if (typeof createImageBitmap === 'undefined' || isSafari || (isFirefox && firefoxVersion < 98)) {
                this.textureLoader = new THREE.TextureLoader(this.options.manager)
            } else {
                this.textureLoader = new THREE.ImageBitmapLoader(this.options.manager)
            }

            this.textureLoader.setCrossOrigin(this.options.crossOrigin)
            this.textureLoader.setRequestHeader(this.options.requestHeader)
            this.fileLoader = new THREE.FileLoader(this.options.manager)
            this.fileLoader.setResponseType('arraybuffer')

            if (this.options.crossOrigin === 'use-credentials') {
                this.fileLoader.setWithCredentials(true)
            }
        }

        setExtensions(extensions) {
            this.extensions = extensions
        }

        setPlugins(plugins) {
            this.plugins = plugins
        }

        parse(onLoad, onError) {
            const parser = this
            const json = this.json
            const extensions = this.extensions // Clear the loader cache

            this.cache.removeAll() // Mark the special nodes/meshes in json for efficient parse

            this._invokeAll(function (ext) {
                return ext._markDefs && ext._markDefs()
            })

            Promise.all(
                this._invokeAll(function (ext) {
                    return ext.beforeRoot && ext.beforeRoot()
                })
            )
                .then(function () {
                    return Promise.all([parser.getDependencies('scene'), parser.getDependencies('animation'), parser.getDependencies('camera')])
                })
                .then(function (dependencies) {
                    const result = {
                        scene: dependencies[0][json.scene || 0],
                        scenes: dependencies[0],
                        animations: dependencies[1],
                        cameras: dependencies[2],
                        asset: json.asset,
                        parser: parser,
                        userData: {},
                    }
                    addUnknownExtensionsToUserData(extensions, result, json)
                    assignExtrasToUserData(result, json)
                    Promise.all(
                        parser._invokeAll(function (ext) {
                            return ext.afterRoot && ext.afterRoot(result)
                        })
                    ).then(function () {
                        onLoad(result)
                    })
                })
                .catch(onError)
        }
        /**
         * Marks the special nodes/meshes in json for efficient parse.
         */

        _markDefs() {
            const nodeDefs = this.json.nodes || []
            const skinDefs = this.json.skins || []
            const meshDefs = this.json.meshes || [] // Nothing in the node definition indicates whether it is a THREE.Bone or an
            // THREE.Object3D. Use the skins' joint references to mark bones.

            for (let skinIndex = 0, skinLength = skinDefs.length; skinIndex < skinLength; skinIndex++) {
                const joints = skinDefs[skinIndex].joints

                for (let i = 0, il = joints.length; i < il; i++) {
                    nodeDefs[joints[i]].isBone = true
                }
            } // Iterate over all nodes, marking references to shared resources,
            // as well as skeleton joints.

            for (let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex++) {
                const nodeDef = nodeDefs[nodeIndex]

                if (nodeDef.mesh !== undefined) {
                    this._addNodeRef(this.meshCache, nodeDef.mesh) // Nothing in the mesh definition indicates whether it is
                    // a THREE.SkinnedMesh or THREE.Mesh. Use the node's mesh reference
                    // to mark THREE.SkinnedMesh if node has skin.

                    if (nodeDef.skin !== undefined) {
                        meshDefs[nodeDef.mesh].isSkinnedMesh = true
                    }
                }

                if (nodeDef.camera !== undefined) {
                    this._addNodeRef(this.cameraCache, nodeDef.camera)
                }
            }
        }
        /**
         * Counts references to shared node / THREE.Object3D resources. These resources
         * can be reused, or "instantiated", at multiple nodes in the scene
         * hierarchy. THREE.Mesh, Camera, and Light instances are instantiated and must
         * be marked. Non-scenegraph resources (like Materials, Geometries, and
         * Textures) can be reused directly and are not marked here.
         *
         * Example: CesiumMilkTruck sample model reuses "Wheel" meshes.
         */

        _addNodeRef(cache, index) {
            if (index === undefined) return

            if (cache.refs[index] === undefined) {
                cache.refs[index] = cache.uses[index] = 0
            }

            cache.refs[index]++
        }
        /** Returns a reference to a shared resource, cloning it if necessary. */

        _getNodeRef(cache, index, object) {
            if (cache.refs[index] <= 1) return object
            const ref = object.clone() // Propagates mappings to the cloned object, prevents mappings on the
            // original object from being lost.

            const updateMappings = (original, clone) => {
                const mappings = this.associations.get(original)

                if (mappings != null) {
                    this.associations.set(clone, mappings)
                }

                for (const [i, child] of original.children.entries()) {
                    updateMappings(child, clone.children[i])
                }
            }

            updateMappings(object, ref)
            ref.name += '_instance_' + cache.uses[index]++
            return ref
        }

        _invokeOne(func) {
            const extensions = Object.values(this.plugins)
            extensions.push(this)

            for (let i = 0; i < extensions.length; i++) {
                const result = func(extensions[i])
                if (result) return result
            }

            return null
        }

        _invokeAll(func) {
            const extensions = Object.values(this.plugins)
            extensions.unshift(this)
            const pending = []

            for (let i = 0; i < extensions.length; i++) {
                const result = func(extensions[i])
                if (result) pending.push(result)
            }

            return pending
        }
        /**
         * Requests the specified dependency asynchronously, with caching.
         * @param {string} type
         * @param {number} index
         * @return {Promise<Object3D|Material|THREE.Texture|AnimationClip|ArrayBuffer|Object>}
         */

        getDependency(type, index) {
            const cacheKey = type + ':' + index
            let dependency = this.cache.get(cacheKey)

            if (!dependency) {
                switch (type) {
                    case 'scene':
                        dependency = this.loadScene(index)
                        break

                    case 'node':
                        dependency = this.loadNode(index)
                        break

                    case 'mesh':
                        dependency = this._invokeOne(function (ext) {
                            return ext.loadMesh && ext.loadMesh(index)
                        })
                        break

                    case 'accessor':
                        dependency = this.loadAccessor(index)
                        break

                    case 'bufferView':
                        dependency = this._invokeOne(function (ext) {
                            return ext.loadBufferView && ext.loadBufferView(index)
                        })
                        break

                    case 'buffer':
                        dependency = this.loadBuffer(index)
                        break

                    case 'material':
                        dependency = this._invokeOne(function (ext) {
                            return ext.loadMaterial && ext.loadMaterial(index)
                        })
                        break

                    case 'texture':
                        dependency = this._invokeOne(function (ext) {
                            return ext.loadTexture && ext.loadTexture(index)
                        })
                        break

                    case 'skin':
                        dependency = this.loadSkin(index)
                        break

                    case 'animation':
                        dependency = this._invokeOne(function (ext) {
                            return ext.loadAnimation && ext.loadAnimation(index)
                        })
                        break

                    case 'camera':
                        dependency = this.loadCamera(index)
                        break

                    default:
                        throw new Error('Unknown type: ' + type)
                }

                this.cache.add(cacheKey, dependency)
            }

            return dependency
        }
        /**
         * Requests all dependencies of the specified type asynchronously, with caching.
         * @param {string} type
         * @return {Promise<Array<Object>>}
         */

        getDependencies(type) {
            let dependencies = this.cache.get(type)

            if (!dependencies) {
                const parser = this
                const defs = this.json[type + (type === 'mesh' ? 'es' : 's')] || []
                dependencies = Promise.all(
                    defs.map(function (def, index) {
                        return parser.getDependency(type, index)
                    })
                )
                this.cache.add(type, dependencies)
            }

            return dependencies
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#buffers-and-buffer-views
         * @param {number} bufferIndex
         * @return {Promise<ArrayBuffer>}
         */

        loadBuffer(bufferIndex) {
            const bufferDef = this.json.buffers[bufferIndex]
            const loader = this.fileLoader

            if (bufferDef.type && bufferDef.type !== 'arraybuffer') {
                throw new Error('THREE.GLTFLoader: ' + bufferDef.type + ' buffer type is not supported.')
            } // If present, GLB container is required to be the first buffer.

            if (bufferDef.uri === undefined && bufferIndex === 0) {
                return Promise.resolve(this.extensions[EXTENSIONS.KHR_BINARY_GLTF].body)
            }

            const options = this.options
            return new Promise(function (resolve, reject) {
                loader.load(THREE.LoaderUtils.resolveURL(bufferDef.uri, options.path), resolve, undefined, function () {
                    reject(new Error('THREE.GLTFLoader: Failed to load buffer "' + bufferDef.uri + '".'))
                })
            })
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#buffers-and-buffer-views
         * @param {number} bufferViewIndex
         * @return {Promise<ArrayBuffer>}
         */

        loadBufferView(bufferViewIndex) {
            const bufferViewDef = this.json.bufferViews[bufferViewIndex]
            return this.getDependency('buffer', bufferViewDef.buffer).then(function (buffer) {
                const byteLength = bufferViewDef.byteLength || 0
                const byteOffset = bufferViewDef.byteOffset || 0
                return buffer.slice(byteOffset, byteOffset + byteLength)
            })
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#accessors
         * @param {number} accessorIndex
         * @return {Promise<BufferAttribute|InterleavedBufferAttribute>}
         */

        loadAccessor(accessorIndex) {
            const parser = this
            const json = this.json
            const accessorDef = this.json.accessors[accessorIndex]

            if (accessorDef.bufferView === undefined && accessorDef.sparse === undefined) {
                // Ignore empty accessors, which may be used to declare runtime
                // information about attributes coming from another source (e.g. Draco
                // compression extension).
                return Promise.resolve(null)
            }

            const pendingBufferViews = []

            if (accessorDef.bufferView !== undefined) {
                pendingBufferViews.push(this.getDependency('bufferView', accessorDef.bufferView))
            } else {
                pendingBufferViews.push(null)
            }

            if (accessorDef.sparse !== undefined) {
                pendingBufferViews.push(this.getDependency('bufferView', accessorDef.sparse.indices.bufferView))
                pendingBufferViews.push(this.getDependency('bufferView', accessorDef.sparse.values.bufferView))
            }

            return Promise.all(pendingBufferViews).then(function (bufferViews) {
                const bufferView = bufferViews[0]
                const itemSize = WEBGL_TYPE_SIZES[accessorDef.type]
                const TypedArray = WEBGL_COMPONENT_TYPES[accessorDef.componentType] // For VEC3: itemSize is 3, elementBytes is 4, itemBytes is 12.

                const elementBytes = TypedArray.BYTES_PER_ELEMENT
                const itemBytes = elementBytes * itemSize
                const byteOffset = accessorDef.byteOffset || 0
                const byteStride = accessorDef.bufferView !== undefined ? json.bufferViews[accessorDef.bufferView].byteStride : undefined
                const normalized = accessorDef.normalized === true
                let array, bufferAttribute // The buffer is not interleaved if the stride is the item size in bytes.

                if (byteStride && byteStride !== itemBytes) {
                    // Each "slice" of the buffer, as defined by 'count' elements of 'byteStride' bytes, gets its own THREE.InterleavedBuffer
                    // This makes sure that IBA.count reflects accessor.count properly
                    const ibSlice = Math.floor(byteOffset / byteStride)
                    const ibCacheKey = 'InterleavedBuffer:' + accessorDef.bufferView + ':' + accessorDef.componentType + ':' + ibSlice + ':' + accessorDef.count
                    let ib = parser.cache.get(ibCacheKey)

                    if (!ib) {
                        array = new TypedArray(bufferView, ibSlice * byteStride, (accessorDef.count * byteStride) / elementBytes) // Integer parameters to IB/IBA are in array elements, not bytes.

                        ib = new THREE.InterleavedBuffer(array, byteStride / elementBytes)
                        parser.cache.add(ibCacheKey, ib)
                    }

                    bufferAttribute = new THREE.InterleavedBufferAttribute(ib, itemSize, (byteOffset % byteStride) / elementBytes, normalized)
                } else {
                    if (bufferView === null) {
                        array = new TypedArray(accessorDef.count * itemSize)
                    } else {
                        array = new TypedArray(bufferView, byteOffset, accessorDef.count * itemSize)
                    }

                    bufferAttribute = new THREE.BufferAttribute(array, itemSize, normalized)
                } // https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#sparse-accessors

                if (accessorDef.sparse !== undefined) {
                    const itemSizeIndices = WEBGL_TYPE_SIZES.SCALAR
                    const TypedArrayIndices = WEBGL_COMPONENT_TYPES[accessorDef.sparse.indices.componentType]
                    const byteOffsetIndices = accessorDef.sparse.indices.byteOffset || 0
                    const byteOffsetValues = accessorDef.sparse.values.byteOffset || 0
                    const sparseIndices = new TypedArrayIndices(bufferViews[1], byteOffsetIndices, accessorDef.sparse.count * itemSizeIndices)
                    const sparseValues = new TypedArray(bufferViews[2], byteOffsetValues, accessorDef.sparse.count * itemSize)

                    if (bufferView !== null) {
                        // Avoid modifying the original ArrayBuffer, if the bufferView wasn't initialized with zeroes.
                        bufferAttribute = new THREE.BufferAttribute(bufferAttribute.array.slice(), bufferAttribute.itemSize, bufferAttribute.normalized)
                    }

                    for (let i = 0, il = sparseIndices.length; i < il; i++) {
                        const index = sparseIndices[i]
                        bufferAttribute.setX(index, sparseValues[i * itemSize])
                        if (itemSize >= 2) bufferAttribute.setY(index, sparseValues[i * itemSize + 1])
                        if (itemSize >= 3) bufferAttribute.setZ(index, sparseValues[i * itemSize + 2])
                        if (itemSize >= 4) bufferAttribute.setW(index, sparseValues[i * itemSize + 3])
                        if (itemSize >= 5) throw new Error('THREE.GLTFLoader: Unsupported itemSize in sparse THREE.BufferAttribute.')
                    }
                }

                return bufferAttribute
            })
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#textures
         * @param {number} textureIndex
         * @return {Promise<THREE.Texture>}
         */

        loadTexture(textureIndex) {
            const json = this.json
            const options = this.options
            const textureDef = json.textures[textureIndex]
            const sourceIndex = textureDef.source
            const sourceDef = json.images[sourceIndex]
            let loader = this.textureLoader

            if (sourceDef.uri) {
                const handler = options.manager.getHandler(sourceDef.uri)
                if (handler !== null) loader = handler
            }

            return this.loadTextureImage(textureIndex, sourceIndex, loader)
        }

        loadTextureImage(textureIndex, sourceIndex, loader) {
            const parser = this
            const json = this.json
            const textureDef = json.textures[textureIndex]
            const sourceDef = json.images[sourceIndex]
            const cacheKey = (sourceDef.uri || sourceDef.bufferView) + ':' + textureDef.sampler

            if (this.textureCache[cacheKey]) {
                // See https://github.com/mrdoob/three.js/issues/21559.
                return this.textureCache[cacheKey]
            }

            const promise = this.loadImageSource(sourceIndex, loader)
                .then(function (texture) {
                    texture.flipY = false
                    if (textureDef.name) texture.name = textureDef.name
                    const samplers = json.samplers || {}
                    const sampler = samplers[textureDef.sampler] || {}
                    texture.magFilter = WEBGL_FILTERS[sampler.magFilter] || THREE.LinearFilter
                    texture.minFilter = WEBGL_FILTERS[sampler.minFilter] || THREE.LinearMipmapLinearFilter
                    texture.wrapS = WEBGL_WRAPPINGS[sampler.wrapS] || THREE.RepeatWrapping
                    texture.wrapT = WEBGL_WRAPPINGS[sampler.wrapT] || THREE.RepeatWrapping
                    parser.associations.set(texture, {
                        textures: textureIndex,
                    })
                    return texture
                })
                .catch(function () {
                    return null
                })
            this.textureCache[cacheKey] = promise
            return promise
        }

        loadImageSource(sourceIndex, loader) {
            const parser = this
            const json = this.json
            const options = this.options

            if (this.sourceCache[sourceIndex] !== undefined) {
                return this.sourceCache[sourceIndex].then(texture => texture.clone())
            }

            const sourceDef = json.images[sourceIndex]
            const URL = self.URL || self.webkitURL
            let sourceURI = sourceDef.uri || ''
            let isObjectURL = false

            if (sourceDef.bufferView !== undefined) {
                // Load binary image data from bufferView, if provided.
                sourceURI = parser.getDependency('bufferView', sourceDef.bufferView).then(function (bufferView) {
                    isObjectURL = true
                    const blob = new Blob([bufferView], {
                        type: sourceDef.mimeType,
                    })
                    sourceURI = URL.createObjectURL(blob)
                    return sourceURI
                })
            } else if (sourceDef.uri === undefined) {
                throw new Error('THREE.GLTFLoader: Image ' + sourceIndex + ' is missing URI and bufferView')
            }

            const promise = Promise.resolve(sourceURI)
                .then(function (sourceURI) {
                    return new Promise(function (resolve, reject) {
                        let onLoad = resolve

                        if (loader.isImageBitmapLoader === true) {
                            onLoad = function (imageBitmap) {
                                const texture = new THREE.Texture(imageBitmap)
                                texture.needsUpdate = true
                                resolve(texture)
                            }
                        }

                        loader.load(THREE.LoaderUtils.resolveURL(sourceURI, options.path), onLoad, undefined, reject)
                    })
                })
                .then(function (texture) {
                    // Clean up resources and configure THREE.Texture.
                    if (isObjectURL === true) {
                        URL.revokeObjectURL(sourceURI)
                    }

                    texture.userData.mimeType = sourceDef.mimeType || getImageURIMimeType(sourceDef.uri)
                    return texture
                })
                .catch(function (error) {
                    console.error("THREE.GLTFLoader: Couldn't load texture", sourceURI)
                    throw error
                })
            this.sourceCache[sourceIndex] = promise
            return promise
        }
        /**
         * Asynchronously assigns a texture to the given material parameters.
         * @param {Object} materialParams
         * @param {string} mapName
         * @param {Object} mapDef
         * @return {Promise<Texture>}
         */

        assignTexture(materialParams, mapName, mapDef, encoding) {
            const parser = this
            return this.getDependency('texture', mapDef.index).then(function (texture) {
                // Materials sample aoMap from UV set 1 and other maps from UV set 0 - this can't be configured
                // However, we will copy UV set 0 to UV set 1 on demand for aoMap
                if (mapDef.texCoord !== undefined && mapDef.texCoord != 0 && !(mapName === 'aoMap' && mapDef.texCoord == 1)) {
                    console.warn('THREE.GLTFLoader: Custom UV set ' + mapDef.texCoord + ' for texture ' + mapName + ' not yet supported.')
                }

                if (parser.extensions[EXTENSIONS.KHR_TEXTURE_TRANSFORM]) {
                    const transform = mapDef.extensions !== undefined ? mapDef.extensions[EXTENSIONS.KHR_TEXTURE_TRANSFORM] : undefined

                    if (transform) {
                        const gltfReference = parser.associations.get(texture)
                        texture = parser.extensions[EXTENSIONS.KHR_TEXTURE_TRANSFORM].extendTexture(texture, transform)
                        parser.associations.set(texture, gltfReference)
                    }
                }

                if (encoding !== undefined) {
                    texture.encoding = encoding
                }

                materialParams[mapName] = texture
                return texture
            })
        }
        /**
         * Assigns final material to a THREE.Mesh, THREE.Line, or THREE.Points instance. The instance
         * already has a material (generated from the glTF material options alone)
         * but reuse of the same glTF material may require multiple threejs materials
         * to accommodate different primitive types, defines, etc. New materials will
         * be created if necessary, and reused from a cache.
         * @param  {Object3D} mesh THREE.Mesh, THREE.Line, or THREE.Points instance.
         */

        assignFinalMaterial(mesh) {
            const geometry = mesh.geometry
            let material = mesh.material
            const useDerivativeTangents = geometry.attributes.tangent === undefined
            const useVertexColors = geometry.attributes.color !== undefined
            const useFlatShading = geometry.attributes.normal === undefined

            if (mesh.isPoints) {
                const cacheKey = 'PointsMaterial:' + material.uuid
                let pointsMaterial = this.cache.get(cacheKey)

                if (!pointsMaterial) {
                    pointsMaterial = new THREE.PointsMaterial()
                    THREE.Material.prototype.copy.call(pointsMaterial, material)
                    pointsMaterial.color.copy(material.color)
                    pointsMaterial.map = material.map
                    pointsMaterial.sizeAttenuation = false // glTF spec says points should be 1px

                    this.cache.add(cacheKey, pointsMaterial)
                }

                material = pointsMaterial
            } else if (mesh.isLine) {
                const cacheKey = 'LineBasicMaterial:' + material.uuid
                let lineMaterial = this.cache.get(cacheKey)

                if (!lineMaterial) {
                    lineMaterial = new THREE.LineBasicMaterial()
                    THREE.Material.prototype.copy.call(lineMaterial, material)
                    lineMaterial.color.copy(material.color)
                    this.cache.add(cacheKey, lineMaterial)
                }

                material = lineMaterial
            } // Clone the material if it will be modified

            if (useDerivativeTangents || useVertexColors || useFlatShading) {
                let cacheKey = 'ClonedMaterial:' + material.uuid + ':'
                if (material.isGLTFSpecularGlossinessMaterial) cacheKey += 'specular-glossiness:'
                if (useDerivativeTangents) cacheKey += 'derivative-tangents:'
                if (useVertexColors) cacheKey += 'vertex-colors:'
                if (useFlatShading) cacheKey += 'flat-shading:'
                let cachedMaterial = this.cache.get(cacheKey)

                if (!cachedMaterial) {
                    cachedMaterial = material.clone()
                    if (useVertexColors) cachedMaterial.vertexColors = true
                    if (useFlatShading) cachedMaterial.flatShading = true

                    if (useDerivativeTangents) {
                        // https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
                        if (cachedMaterial.normalScale) cachedMaterial.normalScale.y *= -1
                        if (cachedMaterial.clearcoatNormalScale) cachedMaterial.clearcoatNormalScale.y *= -1
                    }

                    this.cache.add(cacheKey, cachedMaterial)
                    this.associations.set(cachedMaterial, this.associations.get(material))
                }

                material = cachedMaterial
            } // workarounds for mesh and geometry

            if (material.aoMap && geometry.attributes.uv2 === undefined && geometry.attributes.uv !== undefined) {
                geometry.setAttribute('uv2', geometry.attributes.uv)
            }

            mesh.material = material
        }

        getMaterialType() {
            return THREE.MeshStandardMaterial
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#materials
         * @param {number} materialIndex
         * @return {Promise<Material>}
         */

        loadMaterial(materialIndex) {
            const parser = this
            const json = this.json
            const extensions = this.extensions
            const materialDef = json.materials[materialIndex]
            let materialType
            const materialParams = {}
            const materialExtensions = materialDef.extensions || {}
            const pending = []

            if (materialExtensions[EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS]) {
                const sgExtension = extensions[EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS]
                materialType = sgExtension.getMaterialType()
                pending.push(sgExtension.extendParams(materialParams, materialDef, parser))
            } else if (materialExtensions[EXTENSIONS.KHR_MATERIALS_UNLIT]) {
                const kmuExtension = extensions[EXTENSIONS.KHR_MATERIALS_UNLIT]
                materialType = kmuExtension.getMaterialType()
                pending.push(kmuExtension.extendParams(materialParams, materialDef, parser))
            } else {
                // Specification:
                // https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#metallic-roughness-material
                const metallicRoughness = materialDef.pbrMetallicRoughness || {}
                materialParams.color = new THREE.Color(1.0, 1.0, 1.0)
                materialParams.opacity = 1.0

                if (Array.isArray(metallicRoughness.baseColorFactor)) {
                    const array = metallicRoughness.baseColorFactor
                    materialParams.color.fromArray(array)
                    materialParams.opacity = array[3]
                }

                if (metallicRoughness.baseColorTexture !== undefined) {
                    pending.push(parser.assignTexture(materialParams, 'map', metallicRoughness.baseColorTexture, THREE.sRGBEncoding))
                }

                materialParams.metalness = metallicRoughness.metallicFactor !== undefined ? metallicRoughness.metallicFactor : 1.0
                materialParams.roughness = metallicRoughness.roughnessFactor !== undefined ? metallicRoughness.roughnessFactor : 1.0

                if (metallicRoughness.metallicRoughnessTexture !== undefined) {
                    pending.push(parser.assignTexture(materialParams, 'metalnessMap', metallicRoughness.metallicRoughnessTexture))
                    pending.push(parser.assignTexture(materialParams, 'roughnessMap', metallicRoughness.metallicRoughnessTexture))
                }

                materialType = this._invokeOne(function (ext) {
                    return ext.getMaterialType && ext.getMaterialType(materialIndex)
                })
                pending.push(
                    Promise.all(
                        this._invokeAll(function (ext) {
                            return ext.extendMaterialParams && ext.extendMaterialParams(materialIndex, materialParams)
                        })
                    )
                )
            }

            if (materialDef.doubleSided === true) {
                materialParams.side = THREE.DoubleSide
            }

            const alphaMode = materialDef.alphaMode || ALPHA_MODES.OPAQUE

            if (alphaMode === ALPHA_MODES.BLEND) {
                materialParams.transparent = true // See: https://github.com/mrdoob/three.js/issues/17706

                materialParams.depthWrite = false
            } else {
                materialParams.transparent = false

                if (alphaMode === ALPHA_MODES.MASK) {
                    materialParams.alphaTest = materialDef.alphaCutoff !== undefined ? materialDef.alphaCutoff : 0.5
                }
            }

            if (materialDef.normalTexture !== undefined && materialType !== THREE.MeshBasicMaterial) {
                pending.push(parser.assignTexture(materialParams, 'normalMap', materialDef.normalTexture))
                materialParams.normalScale = new THREE.Vector2(1, 1)

                if (materialDef.normalTexture.scale !== undefined) {
                    const scale = materialDef.normalTexture.scale
                    materialParams.normalScale.set(scale, scale)
                }
            }

            if (materialDef.occlusionTexture !== undefined && materialType !== THREE.MeshBasicMaterial) {
                pending.push(parser.assignTexture(materialParams, 'aoMap', materialDef.occlusionTexture))

                if (materialDef.occlusionTexture.strength !== undefined) {
                    materialParams.aoMapIntensity = materialDef.occlusionTexture.strength
                }
            }

            if (materialDef.emissiveFactor !== undefined && materialType !== THREE.MeshBasicMaterial) {
                materialParams.emissive = new THREE.Color().fromArray(materialDef.emissiveFactor)
            }

            if (materialDef.emissiveTexture !== undefined && materialType !== THREE.MeshBasicMaterial) {
                pending.push(parser.assignTexture(materialParams, 'emissiveMap', materialDef.emissiveTexture, THREE.sRGBEncoding))
            }

            return Promise.all(pending).then(function () {
                let material

                if (materialType === GLTFMeshStandardSGMaterial) {
                    material = extensions[EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS].createMaterial(materialParams)
                } else {
                    material = new materialType(materialParams)
                }

                if (materialDef.name) material.name = materialDef.name
                assignExtrasToUserData(material, materialDef)
                parser.associations.set(material, {
                    materials: materialIndex,
                })
                if (materialDef.extensions) addUnknownExtensionsToUserData(extensions, material, materialDef)
                return material
            })
        }
        /** When THREE.Object3D instances are targeted by animation, they need unique names. */

        createUniqueName(originalName) {
            const sanitizedName = THREE.PropertyBinding.sanitizeNodeName(originalName || '')
            let name = sanitizedName

            for (let i = 1; this.nodeNamesUsed[name]; ++i) {
                name = sanitizedName + '_' + i
            }

            this.nodeNamesUsed[name] = true
            return name
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#geometry
         *
         * Creates BufferGeometries from primitives.
         *
         * @param {Array<GLTF.Primitive>} primitives
         * @return {Promise<Array<BufferGeometry>>}
         */

        loadGeometries(primitives) {
            const parser = this
            const extensions = this.extensions
            const cache = this.primitiveCache

            function createDracoPrimitive(primitive) {
                return extensions[EXTENSIONS.KHR_DRACO_MESH_COMPRESSION].decodePrimitive(primitive, parser).then(function (geometry) {
                    return addPrimitiveAttributes(geometry, primitive, parser)
                })
            }

            const pending = []

            for (let i = 0, il = primitives.length; i < il; i++) {
                const primitive = primitives[i]
                const cacheKey = createPrimitiveKey(primitive) // See if we've already created this geometry

                const cached = cache[cacheKey]

                if (cached) {
                    // Use the cached geometry if it exists
                    pending.push(cached.promise)
                } else {
                    let geometryPromise

                    if (primitive.extensions && primitive.extensions[EXTENSIONS.KHR_DRACO_MESH_COMPRESSION]) {
                        // Use DRACO geometry if available
                        geometryPromise = createDracoPrimitive(primitive)
                    } else {
                        // Otherwise create a new geometry
                        geometryPromise = addPrimitiveAttributes(new THREE.BufferGeometry(), primitive, parser)
                    } // Cache this geometry

                    cache[cacheKey] = {
                        primitive: primitive,
                        promise: geometryPromise,
                    }
                    pending.push(geometryPromise)
                }
            }

            return Promise.all(pending)
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#meshes
         * @param {number} meshIndex
         * @return {Promise<Group|Mesh|SkinnedMesh>}
         */

        loadMesh(meshIndex) {
            const parser = this
            const json = this.json
            const extensions = this.extensions
            const meshDef = json.meshes[meshIndex]
            const primitives = meshDef.primitives
            const pending = []

            for (let i = 0, il = primitives.length; i < il; i++) {
                const material = primitives[i].material === undefined ? createDefaultMaterial(this.cache) : this.getDependency('material', primitives[i].material)
                pending.push(material)
            }

            pending.push(parser.loadGeometries(primitives))
            return Promise.all(pending).then(function (results) {
                const materials = results.slice(0, results.length - 1)
                const geometries = results[results.length - 1]
                const meshes = []

                for (let i = 0, il = geometries.length; i < il; i++) {
                    const geometry = geometries[i]
                    const primitive = primitives[i] // 1. create THREE.Mesh

                    let mesh
                    const material = materials[i]

                    if (
                        primitive.mode === WEBGL_CONSTANTS.TRIANGLES ||
                        primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP ||
                        primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN ||
                        primitive.mode === undefined
                    ) {
                        // .isSkinnedMesh isn't in glTF spec. See ._markDefs()
                        mesh = meshDef.isSkinnedMesh === true ? new THREE.SkinnedMesh(geometry, material) : new THREE.Mesh(geometry, material)

                        if (mesh.isSkinnedMesh === true && !mesh.geometry.attributes.skinWeight.normalized) {
                            // we normalize floating point skin weight array to fix malformed assets (see #15319)
                            // it's important to skip this for non-float32 data since normalizeSkinWeights assumes non-normalized inputs
                            mesh.normalizeSkinWeights()
                        }

                        if (primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP) {
                            mesh.geometry = toTrianglesDrawMode(mesh.geometry, THREE.TriangleStripDrawMode)
                        } else if (primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN) {
                            mesh.geometry = toTrianglesDrawMode(mesh.geometry, THREE.TriangleFanDrawMode)
                        }
                    } else if (primitive.mode === WEBGL_CONSTANTS.LINES) {
                        mesh = new THREE.LineSegments(geometry, material)
                    } else if (primitive.mode === WEBGL_CONSTANTS.LINE_STRIP) {
                        mesh = new THREE.Line(geometry, material)
                    } else if (primitive.mode === WEBGL_CONSTANTS.LINE_LOOP) {
                        mesh = new THREE.LineLoop(geometry, material)
                    } else if (primitive.mode === WEBGL_CONSTANTS.POINTS) {
                        mesh = new THREE.Points(geometry, material)
                    } else {
                        throw new Error('THREE.GLTFLoader: Primitive mode unsupported: ' + primitive.mode)
                    }

                    if (Object.keys(mesh.geometry.morphAttributes).length > 0) {
                        updateMorphTargets(mesh, meshDef)
                    }

                    mesh.name = parser.createUniqueName(meshDef.name || 'mesh_' + meshIndex)
                    assignExtrasToUserData(mesh, meshDef)
                    if (primitive.extensions) addUnknownExtensionsToUserData(extensions, mesh, primitive)
                    parser.assignFinalMaterial(mesh)
                    meshes.push(mesh)
                }

                for (let i = 0, il = meshes.length; i < il; i++) {
                    parser.associations.set(meshes[i], {
                        meshes: meshIndex,
                        primitives: i,
                    })
                }

                if (meshes.length === 1) {
                    return meshes[0]
                }

                const group = new THREE.Group()
                parser.associations.set(group, {
                    meshes: meshIndex,
                })

                for (let i = 0, il = meshes.length; i < il; i++) {
                    group.add(meshes[i])
                }

                return group
            })
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#cameras
         * @param {number} cameraIndex
         * @return {Promise<THREE.Camera>}
         */

        loadCamera(cameraIndex) {
            let camera
            const cameraDef = this.json.cameras[cameraIndex]
            const params = cameraDef[cameraDef.type]

            if (!params) {
                console.warn('THREE.GLTFLoader: Missing camera parameters.')
                return
            }

            if (cameraDef.type === 'perspective') {
                camera = new THREE.PerspectiveCamera(THREE.MathUtils.radToDeg(params.yfov), params.aspectRatio || 1, params.znear || 1, params.zfar || 2e6)
            } else if (cameraDef.type === 'orthographic') {
                camera = new THREE.OrthographicCamera(-params.xmag, params.xmag, params.ymag, -params.ymag, params.znear, params.zfar)
            }

            if (cameraDef.name) camera.name = this.createUniqueName(cameraDef.name)
            assignExtrasToUserData(camera, cameraDef)
            return Promise.resolve(camera)
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#skins
         * @param {number} skinIndex
         * @return {Promise<Object>}
         */

        loadSkin(skinIndex) {
            const skinDef = this.json.skins[skinIndex]
            const skinEntry = {
                joints: skinDef.joints,
            }

            if (skinDef.inverseBindMatrices === undefined) {
                return Promise.resolve(skinEntry)
            }

            return this.getDependency('accessor', skinDef.inverseBindMatrices).then(function (accessor) {
                skinEntry.inverseBindMatrices = accessor
                return skinEntry
            })
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#animations
         * @param {number} animationIndex
         * @return {Promise<AnimationClip>}
         */

        loadAnimation(animationIndex) {
            const json = this.json
            const animationDef = json.animations[animationIndex]
            const pendingNodes = []
            const pendingInputAccessors = []
            const pendingOutputAccessors = []
            const pendingSamplers = []
            const pendingTargets = []

            for (let i = 0, il = animationDef.channels.length; i < il; i++) {
                const channel = animationDef.channels[i]
                const sampler = animationDef.samplers[channel.sampler]
                const target = channel.target
                const name = target.node
                const input = animationDef.parameters !== undefined ? animationDef.parameters[sampler.input] : sampler.input
                const output = animationDef.parameters !== undefined ? animationDef.parameters[sampler.output] : sampler.output
                pendingNodes.push(this.getDependency('node', name))
                pendingInputAccessors.push(this.getDependency('accessor', input))
                pendingOutputAccessors.push(this.getDependency('accessor', output))
                pendingSamplers.push(sampler)
                pendingTargets.push(target)
            }

            return Promise.all([Promise.all(pendingNodes), Promise.all(pendingInputAccessors), Promise.all(pendingOutputAccessors), Promise.all(pendingSamplers), Promise.all(pendingTargets)]).then(
                function (dependencies) {
                    const nodes = dependencies[0]
                    const inputAccessors = dependencies[1]
                    const outputAccessors = dependencies[2]
                    const samplers = dependencies[3]
                    const targets = dependencies[4]
                    const tracks = []

                    for (let i = 0, il = nodes.length; i < il; i++) {
                        const node = nodes[i]
                        const inputAccessor = inputAccessors[i]
                        const outputAccessor = outputAccessors[i]
                        const sampler = samplers[i]
                        const target = targets[i]
                        if (node === undefined) continue
                        node.updateMatrix()
                        let TypedKeyframeTrack

                        switch (PATH_PROPERTIES[target.path]) {
                            case PATH_PROPERTIES.weights:
                                TypedKeyframeTrack = THREE.NumberKeyframeTrack
                                break

                            case PATH_PROPERTIES.rotation:
                                TypedKeyframeTrack = THREE.QuaternionKeyframeTrack
                                break

                            case PATH_PROPERTIES.position:
                            case PATH_PROPERTIES.scale:
                            default:
                                TypedKeyframeTrack = THREE.VectorKeyframeTrack
                                break
                        }

                        const targetName = node.name ? node.name : node.uuid
                        const interpolation = sampler.interpolation !== undefined ? INTERPOLATION[sampler.interpolation] : THREE.InterpolateLinear
                        const targetNames = []

                        if (PATH_PROPERTIES[target.path] === PATH_PROPERTIES.weights) {
                            node.traverse(function (object) {
                                if (object.morphTargetInfluences) {
                                    targetNames.push(object.name ? object.name : object.uuid)
                                }
                            })
                        } else {
                            targetNames.push(targetName)
                        }

                        let outputArray = outputAccessor.array

                        if (outputAccessor.normalized) {
                            const scale = getNormalizedComponentScale(outputArray.constructor)
                            const scaled = new Float32Array(outputArray.length)

                            for (let j = 0, jl = outputArray.length; j < jl; j++) {
                                scaled[j] = outputArray[j] * scale
                            }

                            outputArray = scaled
                        }

                        for (let j = 0, jl = targetNames.length; j < jl; j++) {
                            const track = new TypedKeyframeTrack(targetNames[j] + '.' + PATH_PROPERTIES[target.path], inputAccessor.array, outputArray, interpolation) // Override interpolation with custom factory method.

                            if (sampler.interpolation === 'CUBICSPLINE') {
                                track.createInterpolant = function InterpolantFactoryMethodGLTFCubicSpline(result) {
                                    // A CUBICSPLINE keyframe in glTF has three output values for each input value,
                                    // representing inTangent, splineVertex, and outTangent. As a result, track.getValueSize()
                                    // must be divided by three to get the interpolant's sampleSize argument.
                                    const interpolantType = this instanceof THREE.QuaternionKeyframeTrack ? GLTFCubicSplineQuaternionInterpolant : GLTFCubicSplineInterpolant
                                    return new interpolantType(this.times, this.values, this.getValueSize() / 3, result)
                                } // Mark as CUBICSPLINE. `track.getInterpolation()` doesn't support custom interpolants.

                                track.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline = true
                            }

                            tracks.push(track)
                        }
                    }

                    const name = animationDef.name ? animationDef.name : 'animation_' + animationIndex
                    return new THREE.AnimationClip(name, undefined, tracks)
                }
            )
        }

        createNodeMesh(nodeIndex) {
            const json = this.json
            const parser = this
            const nodeDef = json.nodes[nodeIndex]
            if (nodeDef.mesh === undefined) return null
            return parser.getDependency('mesh', nodeDef.mesh).then(function (mesh) {
                const node = parser._getNodeRef(parser.meshCache, nodeDef.mesh, mesh) // if weights are provided on the node, override weights on the mesh.

                if (nodeDef.weights !== undefined) {
                    node.traverse(function (o) {
                        if (!o.isMesh) return

                        for (let i = 0, il = nodeDef.weights.length; i < il; i++) {
                            o.morphTargetInfluences[i] = nodeDef.weights[i]
                        }
                    })
                }

                return node
            })
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#nodes-and-hierarchy
         * @param {number} nodeIndex
         * @return {Promise<Object3D>}
         */

        loadNode(nodeIndex) {
            const json = this.json
            const extensions = this.extensions
            const parser = this
            const nodeDef = json.nodes[nodeIndex] // reserve node's name before its dependencies, so the root has the intended name.

            const nodeName = nodeDef.name ? parser.createUniqueName(nodeDef.name) : ''
            return (function () {
                const pending = []

                const meshPromise = parser._invokeOne(function (ext) {
                    return ext.createNodeMesh && ext.createNodeMesh(nodeIndex)
                })

                if (meshPromise) {
                    pending.push(meshPromise)
                }

                if (nodeDef.camera !== undefined) {
                    pending.push(
                        parser.getDependency('camera', nodeDef.camera).then(function (camera) {
                            return parser._getNodeRef(parser.cameraCache, nodeDef.camera, camera)
                        })
                    )
                }

                parser
                    ._invokeAll(function (ext) {
                        return ext.createNodeAttachment && ext.createNodeAttachment(nodeIndex)
                    })
                    .forEach(function (promise) {
                        pending.push(promise)
                    })

                return Promise.all(pending)
            })().then(function (objects) {
                let node // .isBone isn't in glTF spec. See ._markDefs

                if (nodeDef.isBone === true) {
                    node = new THREE.Bone()
                } else if (objects.length > 1) {
                    node = new THREE.Group()
                } else if (objects.length === 1) {
                    node = objects[0]
                } else {
                    node = new THREE.Object3D()
                }

                if (node !== objects[0]) {
                    for (let i = 0, il = objects.length; i < il; i++) {
                        node.add(objects[i])
                    }
                }

                if (nodeDef.name) {
                    node.userData.name = nodeDef.name
                    node.name = nodeName
                }

                assignExtrasToUserData(node, nodeDef)
                if (nodeDef.extensions) addUnknownExtensionsToUserData(extensions, node, nodeDef)

                if (nodeDef.matrix !== undefined) {
                    const matrix = new THREE.Matrix4()
                    matrix.fromArray(nodeDef.matrix)
                    node.applyMatrix4(matrix)
                } else {
                    if (nodeDef.translation !== undefined) {
                        node.position.fromArray(nodeDef.translation)
                    }

                    if (nodeDef.rotation !== undefined) {
                        node.quaternion.fromArray(nodeDef.rotation)
                    }

                    if (nodeDef.scale !== undefined) {
                        node.scale.fromArray(nodeDef.scale)
                    }
                }

                if (!parser.associations.has(node)) {
                    parser.associations.set(node, {})
                }

                parser.associations.get(node).nodes = nodeIndex
                return node
            })
        }
        /**
         * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scenes
         * @param {number} sceneIndex
         * @return {Promise<Group>}
         */

        loadScene(sceneIndex) {
            const json = this.json
            const extensions = this.extensions
            const sceneDef = this.json.scenes[sceneIndex]
            const parser = this // THREE.Loader returns THREE.Group, not Scene.
            // See: https://github.com/mrdoob/three.js/issues/18342#issuecomment-578981172

            const scene = new THREE.Group()
            if (sceneDef.name) scene.name = parser.createUniqueName(sceneDef.name)
            assignExtrasToUserData(scene, sceneDef)
            if (sceneDef.extensions) addUnknownExtensionsToUserData(extensions, scene, sceneDef)
            const nodeIds = sceneDef.nodes || []
            const pending = []

            for (let i = 0, il = nodeIds.length; i < il; i++) {
                pending.push(buildNodeHierarchy(nodeIds[i], scene, json, parser))
            }

            return Promise.all(pending).then(function () {
                // Removes dangling associations, associations that reference a node that
                // didn't make it into the scene.
                const reduceAssociations = node => {
                    const reducedAssociations = new Map()

                    for (const [key, value] of parser.associations) {
                        if (key instanceof THREE.Material || key instanceof THREE.Texture) {
                            reducedAssociations.set(key, value)
                        }
                    }

                    node.traverse(node => {
                        const mappings = parser.associations.get(node)

                        if (mappings != null) {
                            reducedAssociations.set(node, mappings)
                        }
                    })
                    return reducedAssociations
                }

                parser.associations = reduceAssociations(scene)
                return scene
            })
        }
    }

    function buildNodeHierarchy(nodeId, parentObject, json, parser) {
        const nodeDef = json.nodes[nodeId]
        return parser
            .getDependency('node', nodeId)
            .then(function (node) {
                if (nodeDef.skin === undefined) return node // build skeleton here as well

                let skinEntry
                return parser
                    .getDependency('skin', nodeDef.skin)
                    .then(function (skin) {
                        skinEntry = skin
                        const pendingJoints = []

                        for (let i = 0, il = skinEntry.joints.length; i < il; i++) {
                            pendingJoints.push(parser.getDependency('node', skinEntry.joints[i]))
                        }

                        return Promise.all(pendingJoints)
                    })
                    .then(function (jointNodes) {
                        node.traverse(function (mesh) {
                            if (!mesh.isMesh) return
                            const bones = []
                            const boneInverses = []

                            for (let j = 0, jl = jointNodes.length; j < jl; j++) {
                                const jointNode = jointNodes[j]

                                if (jointNode) {
                                    bones.push(jointNode)
                                    const mat = new THREE.Matrix4()

                                    if (skinEntry.inverseBindMatrices !== undefined) {
                                        mat.fromArray(skinEntry.inverseBindMatrices.array, j * 16)
                                    }

                                    boneInverses.push(mat)
                                } else {
                                    console.warn('THREE.GLTFLoader: Joint "%s" could not be found.', skinEntry.joints[j])
                                }
                            }

                            mesh.bind(new THREE.Skeleton(bones, boneInverses), mesh.matrixWorld)
                        })
                        return node
                    })
            })
            .then(function (node) {
                // build node hierachy
                parentObject.add(node)
                const pending = []

                if (nodeDef.children) {
                    const children = nodeDef.children

                    for (let i = 0, il = children.length; i < il; i++) {
                        const child = children[i]
                        pending.push(buildNodeHierarchy(child, node, json, parser))
                    }
                }

                return Promise.all(pending)
            })
    }
    /**
     * @param {BufferGeometry} geometry
     * @param {GLTF.Primitive} primitiveDef
     * @param {GLTFParser} parser
     */

    function computeBounds(geometry, primitiveDef, parser) {
        const attributes = primitiveDef.attributes
        const box = new THREE.Box3()

        if (attributes.POSITION !== undefined) {
            const accessor = parser.json.accessors[attributes.POSITION]
            const min = accessor.min
            const max = accessor.max // glTF requires 'min' and 'max', but VRM (which extends glTF) currently ignores that requirement.

            if (min !== undefined && max !== undefined) {
                box.set(new THREE.Vector3(min[0], min[1], min[2]), new THREE.Vector3(max[0], max[1], max[2]))

                if (accessor.normalized) {
                    const boxScale = getNormalizedComponentScale(WEBGL_COMPONENT_TYPES[accessor.componentType])
                    box.min.multiplyScalar(boxScale)
                    box.max.multiplyScalar(boxScale)
                }
            } else {
                console.warn('THREE.GLTFLoader: Missing min/max properties for accessor POSITION.')
                return
            }
        } else {
            return
        }

        const targets = primitiveDef.targets

        if (targets !== undefined) {
            const maxDisplacement = new THREE.Vector3()
            const vector = new THREE.Vector3()

            for (let i = 0, il = targets.length; i < il; i++) {
                const target = targets[i]

                if (target.POSITION !== undefined) {
                    const accessor = parser.json.accessors[target.POSITION]
                    const min = accessor.min
                    const max = accessor.max // glTF requires 'min' and 'max', but VRM (which extends glTF) currently ignores that requirement.

                    if (min !== undefined && max !== undefined) {
                        // we need to get max of absolute components because target weight is [-1,1]
                        vector.setX(Math.max(Math.abs(min[0]), Math.abs(max[0])))
                        vector.setY(Math.max(Math.abs(min[1]), Math.abs(max[1])))
                        vector.setZ(Math.max(Math.abs(min[2]), Math.abs(max[2])))

                        if (accessor.normalized) {
                            const boxScale = getNormalizedComponentScale(WEBGL_COMPONENT_TYPES[accessor.componentType])
                            vector.multiplyScalar(boxScale)
                        } // Note: this assumes that the sum of all weights is at most 1. This isn't quite correct - it's more conservative
                        // to assume that each target can have a max weight of 1. However, for some use cases - notably, when morph targets
                        // are used to implement key-frame animations and as such only two are active at a time - this results in very large
                        // boxes. So for now we make a box that's sometimes a touch too small but is hopefully mostly of reasonable size.

                        maxDisplacement.max(vector)
                    } else {
                        console.warn('THREE.GLTFLoader: Missing min/max properties for accessor POSITION.')
                    }
                }
            } // As per comment above this box isn't conservative, but has a reasonable size for a very large number of morph targets.

            box.expandByVector(maxDisplacement)
        }

        geometry.boundingBox = box
        const sphere = new THREE.Sphere()
        box.getCenter(sphere.center)
        sphere.radius = box.min.distanceTo(box.max) / 2
        geometry.boundingSphere = sphere
    }
    /**
     * @param {BufferGeometry} geometry
     * @param {GLTF.Primitive} primitiveDef
     * @param {GLTFParser} parser
     * @return {Promise<BufferGeometry>}
     */

    function addPrimitiveAttributes(geometry, primitiveDef, parser) {
        const attributes = primitiveDef.attributes
        const pending = []

        function assignAttributeAccessor(accessorIndex, attributeName) {
            return parser.getDependency('accessor', accessorIndex).then(function (accessor) {
                geometry.setAttribute(attributeName, accessor)
            })
        }

        for (const gltfAttributeName in attributes) {
            const threeAttributeName = ATTRIBUTES[gltfAttributeName] || gltfAttributeName.toLowerCase() // Skip attributes already provided by e.g. Draco extension.

            if (threeAttributeName in geometry.attributes) continue
            pending.push(assignAttributeAccessor(attributes[gltfAttributeName], threeAttributeName))
        }

        if (primitiveDef.indices !== undefined && !geometry.index) {
            const accessor = parser.getDependency('accessor', primitiveDef.indices).then(function (accessor) {
                geometry.setIndex(accessor)
            })
            pending.push(accessor)
        }

        assignExtrasToUserData(geometry, primitiveDef)
        computeBounds(geometry, primitiveDef, parser)
        return Promise.all(pending).then(function () {
            return primitiveDef.targets !== undefined ? addMorphTargets(geometry, primitiveDef.targets, parser) : geometry
        })
    }
    /**
     * @param {BufferGeometry} geometry
     * @param {Number} drawMode
     * @return {BufferGeometry}
     */

    function toTrianglesDrawMode(geometry, drawMode) {
        let index = geometry.getIndex() // generate index if not present

        if (index === null) {
            const indices = []
            const position = geometry.getAttribute('position')

            if (position !== undefined) {
                for (let i = 0; i < position.count; i++) {
                    indices.push(i)
                }

                geometry.setIndex(indices)
                index = geometry.getIndex()
            } else {
                console.error('THREE.GLTFLoader.toTrianglesDrawMode(): Undefined position attribute. Processing not possible.')
                return geometry
            }
        } //

        const numberOfTriangles = index.count - 2
        const newIndices = []

        if (drawMode === THREE.TriangleFanDrawMode) {
            // gl.TRIANGLE_FAN
            for (let i = 1; i <= numberOfTriangles; i++) {
                newIndices.push(index.getX(0))
                newIndices.push(index.getX(i))
                newIndices.push(index.getX(i + 1))
            }
        } else {
            // gl.TRIANGLE_STRIP
            for (let i = 0; i < numberOfTriangles; i++) {
                if (i % 2 === 0) {
                    newIndices.push(index.getX(i))
                    newIndices.push(index.getX(i + 1))
                    newIndices.push(index.getX(i + 2))
                } else {
                    newIndices.push(index.getX(i + 2))
                    newIndices.push(index.getX(i + 1))
                    newIndices.push(index.getX(i))
                }
            }
        }

        if (newIndices.length / 3 !== numberOfTriangles) {
            console.error('THREE.GLTFLoader.toTrianglesDrawMode(): Unable to generate correct amount of triangles.')
        } // build final geometry

        const newGeometry = geometry.clone()
        newGeometry.setIndex(newIndices)
        return newGeometry
    }

    THREE.GLTFLoader = GLTFLoader
})()
;
/*! howler.js v2.2.3 | (c) 2013-2020, James Simpson of GoldFire Studios | MIT License | howlerjs.com */
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codecs="1"')||o.canPlayType("audio/wav")).replace(/^no$/,""),aac:!!o.canPlayType("audio/aac;").replace(/^no$/,""),caf:!!o.canPlayType("audio/x-caf;").replace(/^no$/,""),m4a:!!(o.canPlayType("audio/x-m4a;")||o.canPlayType("audio/m4a;")||o.canPlayType("audio/aac;")).replace(/^no$/,""),m4b:!!(o.canPlayType("audio/x-m4b;")||o.canPlayType("audio/m4b;")||o.canPlayType("audio/aac;")).replace(/^no$/,""),mp4:!!(o.canPlayType("audio/x-mp4;")||o.canPlayType("audio/mp4;")||o.canPlayType("audio/aac;")).replace(/^no$/,""),weba:!(_||!o.canPlayType('audio/webm; codecs="vorbis"').replace(/^no$/,"")),webm:!(_||!o.canPlayType('audio/webm; codecs="vorbis"').replace(/^no$/,"")),dolby:!!o.canPlayType('audio/mp4; codecs="ec-3"').replace(/^no$/,""),flac:!!(o.canPlayType("audio/x-flac;")||o.canPlayType("audio/flac;")).replace(/^no$/,"")},e},_unlockAudio:function(){var e=this||n;if(!e._audioUnlocked&&e.ctx){e._audioUnlocked=!1,e.autoUnlock=!1,e._mobileUnloaded||44100===e.ctx.sampleRate||(e._mobileUnloaded=!0,e.unload()),e._scratchBuffer=e.ctx.createBuffer(1,1,22050);var o=function(n){for(;e._html5AudioPool.length<e.html5PoolSize;)try{var t=new Audio;t._unlocked=!0,e._releaseHtml5Audio(t)}catch(n){e.noAudio=!0;break}for(var r=0;r<e._howls.length;r++)if(!e._howls[r]._webAudio)for(var a=e._howls[r]._getSoundIds(),u=0;u<a.length;u++){var d=e._howls[r]._soundById(a[u]);d&&d._node&&!d._node._unlocked&&(d._node._unlocked=!0,d._node.load())}e._autoResume();var i=e.ctx.createBufferSource();i.buffer=e._scratchBuffer,i.connect(e.ctx.destination),void 0===i.start?i.noteOn(0):i.start(0),"function"==typeof e.ctx.resume&&e.ctx.resume(),i.onended=function(){i.disconnect(0),e._audioUnlocked=!0,document.removeEventListener("touchstart",o,!0),document.removeEventListener("touchend",o,!0),document.removeEventListener("click",o,!0),document.removeEventListener("keydown",o,!0);for(var n=0;n<e._howls.length;n++)e._howls[n]._emit("unlock")}};return document.addEventListener("touchstart",o,!0),document.addEventListener("touchend",o,!0),document.addEventListener("click",o,!0),document.addEventListener("keydown",o,!0),e}},_obtainHtml5Audio:function(){var e=this||n;if(e._html5AudioPool.length)return e._html5AudioPool.pop();var o=(new Audio).play();return o&&"undefined"!=typeof Promise&&(o instanceof Promise||"function"==typeof o.then)&&o.catch(function(){console.warn("HTML5 Audio pool exhausted, returning potentially locked audio object.")}),new Audio},_releaseHtml5Audio:function(e){var o=this||n;return e._unlocked&&o._html5AudioPool.push(e),o},_autoSuspend:function(){var e=this;if(e.autoSuspend&&e.ctx&&void 0!==e.ctx.suspend&&n.usingWebAudio){for(var o=0;o<e._howls.length;o++)if(e._howls[o]._webAudio)for(var t=0;t<e._howls[o]._sounds.length;t++)if(!e._howls[o]._sounds[t]._paused)return e;return e._suspendTimer&&clearTimeout(e._suspendTimer),e._suspendTimer=setTimeout(function(){if(e.autoSuspend){e._suspendTimer=null,e.state="suspending";var n=function(){e.state="suspended",e._resumeAfterSuspend&&(delete e._resumeAfterSuspend,e._autoResume())};e.ctx.suspend().then(n,n)}},3e4),e}},_autoResume:function(){var e=this;if(e.ctx&&void 0!==e.ctx.resume&&n.usingWebAudio)return"running"===e.state&&"interrupted"!==e.ctx.state&&e._suspendTimer?(clearTimeout(e._suspendTimer),e._suspendTimer=null):"suspended"===e.state||"running"===e.state&&"interrupted"===e.ctx.state?(e.ctx.resume().then(function(){e.state="running";for(var n=0;n<e._howls.length;n++)e._howls[n]._emit("resume")}),e._suspendTimer&&(clearTimeout(e._suspendTimer),e._suspendTimer=null)):"suspending"===e.state&&(e._resumeAfterSuspend=!0),e}};var n=new e,o=function(e){var n=this;if(!e.src||0===e.src.length)return void console.error("An array of source files must be passed with any new Howl.");n.init(e)};o.prototype={init:function(e){var o=this;return n.ctx||_(),o._autoplay=e.autoplay||!1,o._format="string"!=typeof e.format?e.format:[e.format],o._html5=e.html5||!1,o._muted=e.mute||!1,o._loop=e.loop||!1,o._pool=e.pool||5,o._preload="boolean"!=typeof e.preload&&"metadata"!==e.preload||e.preload,o._rate=e.rate||1,o._sprite=e.sprite||{},o._src="string"!=typeof e.src?e.src:[e.src],o._volume=void 0!==e.volume?e.volume:1,o._xhr={method:e.xhr&&e.xhr.method?e.xhr.method:"GET",headers:e.xhr&&e.xhr.headers?e.xhr.headers:null,withCredentials:!(!e.xhr||!e.xhr.withCredentials)&&e.xhr.withCredentials},o._duration=0,o._state="unloaded",o._sounds=[],o._endTimers={},o._queue=[],o._playLock=!1,o._onend=e.onend?[{fn:e.onend}]:[],o._onfade=e.onfade?[{fn:e.onfade}]:[],o._onload=e.onload?[{fn:e.onload}]:[],o._onloaderror=e.onloaderror?[{fn:e.onloaderror}]:[],o._onplayerror=e.onplayerror?[{fn:e.onplayerror}]:[],o._onpause=e.onpause?[{fn:e.onpause}]:[],o._onplay=e.onplay?[{fn:e.onplay}]:[],o._onstop=e.onstop?[{fn:e.onstop}]:[],o._onmute=e.onmute?[{fn:e.onmute}]:[],o._onvolume=e.onvolume?[{fn:e.onvolume}]:[],o._onrate=e.onrate?[{fn:e.onrate}]:[],o._onseek=e.onseek?[{fn:e.onseek}]:[],o._onunlock=e.onunlock?[{fn:e.onunlock}]:[],o._onresume=[],o._webAudio=n.usingWebAudio&&!o._html5,void 0!==n.ctx&&n.ctx&&n.autoUnlock&&n._unlockAudio(),n._howls.push(o),o._autoplay&&o._queue.push({event:"play",action:function(){o.play()}}),o._preload&&"none"!==o._preload&&o.load(),o},load:function(){var e=this,o=null;if(n.noAudio)return void e._emit("loaderror",null,"No audio support.");"string"==typeof e._src&&(e._src=[e._src]);for(var r=0;r<e._src.length;r++){var u,d;if(e._format&&e._format[r])u=e._format[r];else{if("string"!=typeof(d=e._src[r])){e._emit("loaderror",null,"Non-string found in selected audio sources - ignoring.");continue}u=/^data:audio\/([^;,]+);/i.exec(d),u||(u=/\.([^.]+)$/.exec(d.split("?",1)[0])),u&&(u=u[1].toLowerCase())}if(u||console.warn('No file extension was found. Consider using the "format" property or specify an extension.'),u&&n.codecs(u)){o=e._src[r];break}}return o?(e._src=o,e._state="loading","https:"===window.location.protocol&&"http:"===o.slice(0,5)&&(e._html5=!0,e._webAudio=!1),new t(e),e._webAudio&&a(e),e):void e._emit("loaderror",null,"No codec support for selected audio sources.")},play:function(e,o){var t=this,r=null;if("number"==typeof e)r=e,e=null;else{if("string"==typeof e&&"loaded"===t._state&&!t._sprite[e])return null;if(void 0===e&&(e="__default",!t._playLock)){for(var a=0,u=0;u<t._sounds.length;u++)t._sounds[u]._paused&&!t._sounds[u]._ended&&(a++,r=t._sounds[u]._id);1===a?e=null:r=null}}var d=r?t._soundById(r):t._inactiveSound();if(!d)return null;if(r&&!e&&(e=d._sprite||"__default"),"loaded"!==t._state){d._sprite=e,d._ended=!1;var i=d._id;return t._queue.push({event:"play",action:function(){t.play(i)}}),i}if(r&&!d._paused)return o||t._loadQueue("play"),d._id;t._webAudio&&n._autoResume();var _=Math.max(0,d._seek>0?d._seek:t._sprite[e][0]/1e3),s=Math.max(0,(t._sprite[e][0]+t._sprite[e][1])/1e3-_),l=1e3*s/Math.abs(d._rate),c=t._sprite[e][0]/1e3,f=(t._sprite[e][0]+t._sprite[e][1])/1e3;d._sprite=e,d._ended=!1;var p=function(){d._paused=!1,d._seek=_,d._start=c,d._stop=f,d._loop=!(!d._loop&&!t._sprite[e][2])};if(_>=f)return void t._ended(d);var m=d._node;if(t._webAudio){var v=function(){t._playLock=!1,p(),t._refreshBuffer(d);var e=d._muted||t._muted?0:d._volume;m.gain.setValueAtTime(e,n.ctx.currentTime),d._playStart=n.ctx.currentTime,void 0===m.bufferSource.start?d._loop?m.bufferSource.noteGrainOn(0,_,86400):m.bufferSource.noteGrainOn(0,_,s):d._loop?m.bufferSource.start(0,_,86400):m.bufferSource.start(0,_,s),l!==1/0&&(t._endTimers[d._id]=setTimeout(t._ended.bind(t,d),l)),o||setTimeout(function(){t._emit("play",d._id),t._loadQueue()},0)};"running"===n.state&&"interrupted"!==n.ctx.state?v():(t._playLock=!0,t.once("resume",v),t._clearTimer(d._id))}else{var h=function(){m.currentTime=_,m.muted=d._muted||t._muted||n._muted||m.muted,m.volume=d._volume*n.volume(),m.playbackRate=d._rate;try{var r=m.play();if(r&&"undefined"!=typeof Promise&&(r instanceof Promise||"function"==typeof r.then)?(t._playLock=!0,p(),r.then(function(){t._playLock=!1,m._unlocked=!0,o?t._loadQueue():t._emit("play",d._id)}).catch(function(){t._playLock=!1,t._emit("playerror",d._id,"Playback was unable to start. This is most commonly an issue on mobile devices and Chrome where playback was not within a user interaction."),d._ended=!0,d._paused=!0})):o||(t._playLock=!1,p(),t._emit("play",d._id)),m.playbackRate=d._rate,m.paused)return void t._emit("playerror",d._id,"Playback was unable to start. This is most commonly an issue on mobile devices and Chrome where playback was not within a user interaction.");"__default"!==e||d._loop?t._endTimers[d._id]=setTimeout(t._ended.bind(t,d),l):(t._endTimers[d._id]=function(){t._ended(d),m.removeEventListener("ended",t._endTimers[d._id],!1)},m.addEventListener("ended",t._endTimers[d._id],!1))}catch(e){t._emit("playerror",d._id,e)}};"data:audio/wav;base64,UklGRigAAABXQVZFZm10IBIAAAABAAEARKwAAIhYAQACABAAAABkYXRhAgAAAAEA"===m.src&&(m.src=t._src,m.load());var y=window&&window.ejecta||!m.readyState&&n._navigator.isCocoonJS;if(m.readyState>=3||y)h();else{t._playLock=!0,t._state="loading";var g=function(){t._state="loaded",h(),m.removeEventListener(n._canPlayEvent,g,!1)};m.addEventListener(n._canPlayEvent,g,!1),t._clearTimer(d._id)}}return d._id},pause:function(e){var n=this;if("loaded"!==n._state||n._playLock)return n._queue.push({event:"pause",action:function(){n.pause(e)}}),n;for(var o=n._getSoundIds(e),t=0;t<o.length;t++){n._clearTimer(o[t]);var r=n._soundById(o[t]);if(r&&!r._paused&&(r._seek=n.seek(o[t]),r._rateSeek=0,r._paused=!0,n._stopFade(o[t]),r._node))if(n._webAudio){if(!r._node.bufferSource)continue;void 0===r._node.bufferSource.stop?r._node.bufferSource.noteOff(0):r._node.bufferSource.stop(0),n._cleanBuffer(r._node)}else isNaN(r._node.duration)&&r._node.duration!==1/0||r._node.pause();arguments[1]||n._emit("pause",r?r._id:null)}return n},stop:function(e,n){var o=this;if("loaded"!==o._state||o._playLock)return o._queue.push({event:"stop",action:function(){o.stop(e)}}),o;for(var t=o._getSoundIds(e),r=0;r<t.length;r++){o._clearTimer(t[r]);var a=o._soundById(t[r]);a&&(a._seek=a._start||0,a._rateSeek=0,a._paused=!0,a._ended=!0,o._stopFade(t[r]),a._node&&(o._webAudio?a._node.bufferSource&&(void 0===a._node.bufferSource.stop?a._node.bufferSource.noteOff(0):a._node.bufferSource.stop(0),o._cleanBuffer(a._node)):isNaN(a._node.duration)&&a._node.duration!==1/0||(a._node.currentTime=a._start||0,a._node.pause(),a._node.duration===1/0&&o._clearSound(a._node))),n||o._emit("stop",a._id))}return o},mute:function(e,o){var t=this;if("loaded"!==t._state||t._playLock)return t._queue.push({event:"mute",action:function(){t.mute(e,o)}}),t;if(void 0===o){if("boolean"!=typeof e)return t._muted;t._muted=e}for(var r=t._getSoundIds(o),a=0;a<r.length;a++){var u=t._soundById(r[a]);u&&(u._muted=e,u._interval&&t._stopFade(u._id),t._webAudio&&u._node?u._node.gain.setValueAtTime(e?0:u._volume,n.ctx.currentTime):u._node&&(u._node.muted=!!n._muted||e),t._emit("mute",u._id))}return t},volume:function(){var e,o,t=this,r=arguments;if(0===r.length)return t._volume;if(1===r.length||2===r.length&&void 0===r[1]){t._getSoundIds().indexOf(r[0])>=0?o=parseInt(r[0],10):e=parseFloat(r[0])}else r.length>=2&&(e=parseFloat(r[0]),o=parseInt(r[1],10));var a;if(!(void 0!==e&&e>=0&&e<=1))return a=o?t._soundById(o):t._sounds[0],a?a._volume:0;if("loaded"!==t._state||t._playLock)return t._queue.push({event:"volume",action:function(){t.volume.apply(t,r)}}),t;void 0===o&&(t._volume=e),o=t._getSoundIds(o);for(var u=0;u<o.length;u++)(a=t._soundById(o[u]))&&(a._volume=e,r[2]||t._stopFade(o[u]),t._webAudio&&a._node&&!a._muted?a._node.gain.setValueAtTime(e,n.ctx.currentTime):a._node&&!a._muted&&(a._node.volume=e*n.volume()),t._emit("volume",a._id));return t},fade:function(e,o,t,r){var a=this;if("loaded"!==a._state||a._playLock)return a._queue.push({event:"fade",action:function(){a.fade(e,o,t,r)}}),a;e=Math.min(Math.max(0,parseFloat(e)),1),o=Math.min(Math.max(0,parseFloat(o)),1),t=parseFloat(t),a.volume(e,r);for(var u=a._getSoundIds(r),d=0;d<u.length;d++){var i=a._soundById(u[d]);if(i){if(r||a._stopFade(u[d]),a._webAudio&&!i._muted){var _=n.ctx.currentTime,s=_+t/1e3;i._volume=e,i._node.gain.setValueAtTime(e,_),i._node.gain.linearRampToValueAtTime(o,s)}a._startFadeInterval(i,e,o,t,u[d],void 0===r)}}return a},_startFadeInterval:function(e,n,o,t,r,a){var u=this,d=n,i=o-n,_=Math.abs(i/.01),s=Math.max(4,_>0?t/_:t),l=Date.now();e._fadeTo=o,e._interval=setInterval(function(){var r=(Date.now()-l)/t;l=Date.now(),d+=i*r,d=Math.round(100*d)/100,d=i<0?Math.max(o,d):Math.min(o,d),u._webAudio?e._volume=d:u.volume(d,e._id,!0),a&&(u._volume=d),(o<n&&d<=o||o>n&&d>=o)&&(clearInterval(e._interval),e._interval=null,e._fadeTo=null,u.volume(o,e._id),u._emit("fade",e._id))},s)},_stopFade:function(e){var o=this,t=o._soundById(e);return t&&t._interval&&(o._webAudio&&t._node.gain.cancelScheduledValues(n.ctx.currentTime),clearInterval(t._interval),t._interval=null,o.volume(t._fadeTo,e),t._fadeTo=null,o._emit("fade",e)),o},loop:function(){var e,n,o,t=this,r=arguments;if(0===r.length)return t._loop;if(1===r.length){if("boolean"!=typeof r[0])return!!(o=t._soundById(parseInt(r[0],10)))&&o._loop;e=r[0],t._loop=e}else 2===r.length&&(e=r[0],n=parseInt(r[1],10));for(var a=t._getSoundIds(n),u=0;u<a.length;u++)(o=t._soundById(a[u]))&&(o._loop=e,t._webAudio&&o._node&&o._node.bufferSource&&(o._node.bufferSource.loop=e,e&&(o._node.bufferSource.loopStart=o._start||0,o._node.bufferSource.loopEnd=o._stop,t.playing(a[u])&&(t.pause(a[u],!0),t.play(a[u],!0)))));return t},rate:function(){var e,o,t=this,r=arguments;if(0===r.length)o=t._sounds[0]._id;else if(1===r.length){var a=t._getSoundIds(),u=a.indexOf(r[0]);u>=0?o=parseInt(r[0],10):e=parseFloat(r[0])}else 2===r.length&&(e=parseFloat(r[0]),o=parseInt(r[1],10));var d;if("number"!=typeof e)return d=t._soundById(o),d?d._rate:t._rate;if("loaded"!==t._state||t._playLock)return t._queue.push({event:"rate",action:function(){t.rate.apply(t,r)}}),t;void 0===o&&(t._rate=e),o=t._getSoundIds(o);for(var i=0;i<o.length;i++)if(d=t._soundById(o[i])){t.playing(o[i])&&(d._rateSeek=t.seek(o[i]),d._playStart=t._webAudio?n.ctx.currentTime:d._playStart),d._rate=e,t._webAudio&&d._node&&d._node.bufferSource?d._node.bufferSource.playbackRate.setValueAtTime(e,n.ctx.currentTime):d._node&&(d._node.playbackRate=e);var _=t.seek(o[i]),s=(t._sprite[d._sprite][0]+t._sprite[d._sprite][1])/1e3-_,l=1e3*s/Math.abs(d._rate);!t._endTimers[o[i]]&&d._paused||(t._clearTimer(o[i]),t._endTimers[o[i]]=setTimeout(t._ended.bind(t,d),l)),t._emit("rate",d._id)}return t},seek:function(){var e,o,t=this,r=arguments;if(0===r.length)t._sounds.length&&(o=t._sounds[0]._id);else if(1===r.length){var a=t._getSoundIds(),u=a.indexOf(r[0]);u>=0?o=parseInt(r[0],10):t._sounds.length&&(o=t._sounds[0]._id,e=parseFloat(r[0]))}else 2===r.length&&(e=parseFloat(r[0]),o=parseInt(r[1],10));if(void 0===o)return 0;if("number"==typeof e&&("loaded"!==t._state||t._playLock))return t._queue.push({event:"seek",action:function(){t.seek.apply(t,r)}}),t;var d=t._soundById(o);if(d){if(!("number"==typeof e&&e>=0)){if(t._webAudio){var i=t.playing(o)?n.ctx.currentTime-d._playStart:0,_=d._rateSeek?d._rateSeek-d._seek:0;return d._seek+(_+i*Math.abs(d._rate))}return d._node.currentTime}var s=t.playing(o);s&&t.pause(o,!0),d._seek=e,d._ended=!1,t._clearTimer(o),t._webAudio||!d._node||isNaN(d._node.duration)||(d._node.currentTime=e);var l=function(){s&&t.play(o,!0),t._emit("seek",o)};if(s&&!t._webAudio){var c=function(){t._playLock?setTimeout(c,0):l()};setTimeout(c,0)}else l()}return t},playing:function(e){var n=this;if("number"==typeof e){var o=n._soundById(e);return!!o&&!o._paused}for(var t=0;t<n._sounds.length;t++)if(!n._sounds[t]._paused)return!0;return!1},duration:function(e){var n=this,o=n._duration,t=n._soundById(e);return t&&(o=n._sprite[t._sprite][1]/1e3),o},state:function(){return this._state},unload:function(){for(var e=this,o=e._sounds,t=0;t<o.length;t++)o[t]._paused||e.stop(o[t]._id),e._webAudio||(e._clearSound(o[t]._node),o[t]._node.removeEventListener("error",o[t]._errorFn,!1),o[t]._node.removeEventListener(n._canPlayEvent,o[t]._loadFn,!1),o[t]._node.removeEventListener("ended",o[t]._endFn,!1),n._releaseHtml5Audio(o[t]._node)),delete o[t]._node,e._clearTimer(o[t]._id);var a=n._howls.indexOf(e);a>=0&&n._howls.splice(a,1);var u=!0;for(t=0;t<n._howls.length;t++)if(n._howls[t]._src===e._src||e._src.indexOf(n._howls[t]._src)>=0){u=!1;break}return r&&u&&delete r[e._src],n.noAudio=!1,e._state="unloaded",e._sounds=[],e=null,null},on:function(e,n,o,t){var r=this,a=r["_on"+e];return"function"==typeof n&&a.push(t?{id:o,fn:n,once:t}:{id:o,fn:n}),r},off:function(e,n,o){var t=this,r=t["_on"+e],a=0;if("number"==typeof n&&(o=n,n=null),n||o)for(a=0;a<r.length;a++){var u=o===r[a].id;if(n===r[a].fn&&u||!n&&u){r.splice(a,1);break}}else if(e)t["_on"+e]=[];else{var d=Object.keys(t);for(a=0;a<d.length;a++)0===d[a].indexOf("_on")&&Array.isArray(t[d[a]])&&(t[d[a]]=[])}return t},once:function(e,n,o){var t=this;return t.on(e,n,o,1),t},_emit:function(e,n,o){for(var t=this,r=t["_on"+e],a=r.length-1;a>=0;a--)r[a].id&&r[a].id!==n&&"load"!==e||(setTimeout(function(e){e.call(this,n,o)}.bind(t,r[a].fn),0),r[a].once&&t.off(e,r[a].fn,r[a].id));return t._loadQueue(e),t},_loadQueue:function(e){var n=this;if(n._queue.length>0){var o=n._queue[0];o.event===e&&(n._queue.shift(),n._loadQueue()),e||o.action()}return n},_ended:function(e){var o=this,t=e._sprite;if(!o._webAudio&&e._node&&!e._node.paused&&!e._node.ended&&e._node.currentTime<e._stop)return setTimeout(o._ended.bind(o,e),100),o;var r=!(!e._loop&&!o._sprite[t][2]);if(o._emit("end",e._id),!o._webAudio&&r&&o.stop(e._id,!0).play(e._id),o._webAudio&&r){o._emit("play",e._id),e._seek=e._start||0,e._rateSeek=0,e._playStart=n.ctx.currentTime;var a=1e3*(e._stop-e._start)/Math.abs(e._rate);o._endTimers[e._id]=setTimeout(o._ended.bind(o,e),a)}return o._webAudio&&!r&&(e._paused=!0,e._ended=!0,e._seek=e._start||0,e._rateSeek=0,o._clearTimer(e._id),o._cleanBuffer(e._node),n._autoSuspend()),o._webAudio||r||o.stop(e._id,!0),o},_clearTimer:function(e){var n=this;if(n._endTimers[e]){if("function"!=typeof n._endTimers[e])clearTimeout(n._endTimers[e]);else{var o=n._soundById(e);o&&o._node&&o._node.removeEventListener("ended",n._endTimers[e],!1)}delete n._endTimers[e]}return n},_soundById:function(e){for(var n=this,o=0;o<n._sounds.length;o++)if(e===n._sounds[o]._id)return n._sounds[o];return null},_inactiveSound:function(){var e=this;e._drain();for(var n=0;n<e._sounds.length;n++)if(e._sounds[n]._ended)return e._sounds[n].reset();return new t(e)},_drain:function(){var e=this,n=e._pool,o=0,t=0;if(!(e._sounds.length<n)){for(t=0;t<e._sounds.length;t++)e._sounds[t]._ended&&o++;for(t=e._sounds.length-1;t>=0;t--){if(o<=n)return;e._sounds[t]._ended&&(e._webAudio&&e._sounds[t]._node&&e._sounds[t]._node.disconnect(0),e._sounds.splice(t,1),o--)}}},_getSoundIds:function(e){var n=this;if(void 0===e){for(var o=[],t=0;t<n._sounds.length;t++)o.push(n._sounds[t]._id);return o}return[e]},_refreshBuffer:function(e){var o=this;return e._node.bufferSource=n.ctx.createBufferSource(),e._node.bufferSource.buffer=r[o._src],e._panner?e._node.bufferSource.connect(e._panner):e._node.bufferSource.connect(e._node),e._node.bufferSource.loop=e._loop,e._loop&&(e._node.bufferSource.loopStart=e._start||0,e._node.bufferSource.loopEnd=e._stop||0),e._node.bufferSource.playbackRate.setValueAtTime(e._rate,n.ctx.currentTime),o},_cleanBuffer:function(e){var o=this,t=n._navigator&&n._navigator.vendor.indexOf("Apple")>=0;if(n._scratchBuffer&&e.bufferSource&&(e.bufferSource.onended=null,e.bufferSource.disconnect(0),t))try{e.bufferSource.buffer=n._scratchBuffer}catch(e){}return e.bufferSource=null,o},_clearSound:function(e){/MSIE |Trident\//.test(n._navigator&&n._navigator.userAgent)||(e.src="data:audio/wav;base64,UklGRigAAABXQVZFZm10IBIAAAABAAEARKwAAIhYAQACABAAAABkYXRhAgAAAAEA")}};var t=function(e){this._parent=e,this.init()};t.prototype={init:function(){var e=this,o=e._parent;return e._muted=o._muted,e._loop=o._loop,e._volume=o._volume,e._rate=o._rate,e._seek=0,e._paused=!0,e._ended=!0,e._sprite="__default",e._id=++n._counter,o._sounds.push(e),e.create(),e},create:function(){var e=this,o=e._parent,t=n._muted||e._muted||e._parent._muted?0:e._volume;return o._webAudio?(e._node=void 0===n.ctx.createGain?n.ctx.createGainNode():n.ctx.createGain(),e._node.gain.setValueAtTime(t,n.ctx.currentTime),e._node.paused=!0,e._node.connect(n.masterGain)):n.noAudio||(e._node=n._obtainHtml5Audio(),e._errorFn=e._errorListener.bind(e),e._node.addEventListener("error",e._errorFn,!1),e._loadFn=e._loadListener.bind(e),e._node.addEventListener(n._canPlayEvent,e._loadFn,!1),e._endFn=e._endListener.bind(e),e._node.addEventListener("ended",e._endFn,!1),e._node.src=o._src,e._node.preload=!0===o._preload?"auto":o._preload,e._node.volume=t*n.volume(),e._node.load()),e},reset:function(){var e=this,o=e._parent;return e._muted=o._muted,e._loop=o._loop,e._volume=o._volume,e._rate=o._rate,e._seek=0,e._rateSeek=0,e._paused=!0,e._ended=!0,e._sprite="__default",e._id=++n._counter,e},_errorListener:function(){var e=this;e._parent._emit("loaderror",e._id,e._node.error?e._node.error.code:0),e._node.removeEventListener("error",e._errorFn,!1)},_loadListener:function(){var e=this,o=e._parent;o._duration=Math.ceil(10*e._node.duration)/10,0===Object.keys(o._sprite).length&&(o._sprite={__default:[0,1e3*o._duration]}),"loaded"!==o._state&&(o._state="loaded",o._emit("load"),o._loadQueue()),e._node.removeEventListener(n._canPlayEvent,e._loadFn,!1)},_endListener:function(){var e=this,n=e._parent;n._duration===1/0&&(n._duration=Math.ceil(10*e._node.duration)/10,n._sprite.__default[1]===1/0&&(n._sprite.__default[1]=1e3*n._duration),n._ended(e)),e._node.removeEventListener("ended",e._endFn,!1)}};var r={},a=function(e){var n=e._src;if(r[n])return e._duration=r[n].duration,void i(e);if(/^data:[^;]+;base64,/.test(n)){for(var o=atob(n.split(",")[1]),t=new Uint8Array(o.length),a=0;a<o.length;++a)t[a]=o.charCodeAt(a);d(t.buffer,e)}else{var _=new XMLHttpRequest;_.open(e._xhr.method,n,!0),_.withCredentials=e._xhr.withCredentials,_.responseType="arraybuffer",e._xhr.headers&&Object.keys(e._xhr.headers).forEach(function(n){_.setRequestHeader(n,e._xhr.headers[n])}),_.onload=function(){var n=(_.status+"")[0];if("0"!==n&&"2"!==n&&"3"!==n)return void e._emit("loaderror",null,"Failed loading audio file with status: "+_.status+".");d(_.response,e)},_.onerror=function(){e._webAudio&&(e._html5=!0,e._webAudio=!1,e._sounds=[],delete r[n],e.load())},u(_)}},u=function(e){try{e.send()}catch(n){e.onerror()}},d=function(e,o){var t=function(){o._emit("loaderror",null,"Decoding audio data failed.")},a=function(e){e&&o._sounds.length>0?(r[o._src]=e,i(o,e)):t()};"undefined"!=typeof Promise&&1===n.ctx.decodeAudioData.length?n.ctx.decodeAudioData(e).then(a).catch(t):n.ctx.decodeAudioData(e,a,t)},i=function(e,n){n&&!e._duration&&(e._duration=n.duration),0===Object.keys(e._sprite).length&&(e._sprite={__default:[0,1e3*e._duration]}),"loaded"!==e._state&&(e._state="loaded",e._emit("load"),e._loadQueue())},_=function(){if(n.usingWebAudio){try{"undefined"!=typeof AudioContext?n.ctx=new AudioContext:"undefined"!=typeof webkitAudioContext?n.ctx=new webkitAudioContext:n.usingWebAudio=!1}catch(e){n.usingWebAudio=!1}n.ctx||(n.usingWebAudio=!1);var e=/iP(hone|od|ad)/.test(n._navigator&&n._navigator.platform),o=n._navigator&&n._navigator.appVersion.match(/OS (\d+)_(\d+)_?(\d+)?/),t=o?parseInt(o[1],10):null;if(e&&t&&t<9){var r=/safari/.test(n._navigator&&n._navigator.userAgent.toLowerCase());n._navigator&&!r&&(n.usingWebAudio=!1)}n.usingWebAudio&&(n.masterGain=void 0===n.ctx.createGain?n.ctx.createGainNode():n.ctx.createGain(),n.masterGain.gain.setValueAtTime(n._muted?0:n._volume,n.ctx.currentTime),n.masterGain.connect(n.ctx.destination)),n._setup()}};"function"==typeof define&&define.amd&&define([],function(){return{Howler:n,Howl:o}}),"undefined"!=typeof exports&&(exports.Howler=n,exports.Howl=o),"undefined"!=typeof global?(global.HowlerGlobal=e,global.Howler=n,global.Howl=o,global.Sound=t):"undefined"!=typeof window&&(window.HowlerGlobal=e,window.Howler=n,window.Howl=o,window.Sound=t)}();
/*! Spatial Plugin */
!function(){"use strict";HowlerGlobal.prototype._pos=[0,0,0],HowlerGlobal.prototype._orientation=[0,0,-1,0,1,0],HowlerGlobal.prototype.stereo=function(e){var n=this;if(!n.ctx||!n.ctx.listener)return n;for(var t=n._howls.length-1;t>=0;t--)n._howls[t].stereo(e);return n},HowlerGlobal.prototype.pos=function(e,n,t){var r=this;return r.ctx&&r.ctx.listener?(n="number"!=typeof n?r._pos[1]:n,t="number"!=typeof t?r._pos[2]:t,"number"!=typeof e?r._pos:(r._pos=[e,n,t],void 0!==r.ctx.listener.positionX?(r.ctx.listener.positionX.setTargetAtTime(r._pos[0],Howler.ctx.currentTime,.1),r.ctx.listener.positionY.setTargetAtTime(r._pos[1],Howler.ctx.currentTime,.1),r.ctx.listener.positionZ.setTargetAtTime(r._pos[2],Howler.ctx.currentTime,.1)):r.ctx.listener.setPosition(r._pos[0],r._pos[1],r._pos[2]),r)):r},HowlerGlobal.prototype.orientation=function(e,n,t,r,o,i){var a=this;if(!a.ctx||!a.ctx.listener)return a;var s=a._orientation;return n="number"!=typeof n?s[1]:n,t="number"!=typeof t?s[2]:t,r="number"!=typeof r?s[3]:r,o="number"!=typeof o?s[4]:o,i="number"!=typeof i?s[5]:i,"number"!=typeof e?s:(a._orientation=[e,n,t,r,o,i],void 0!==a.ctx.listener.forwardX?(a.ctx.listener.forwardX.setTargetAtTime(e,Howler.ctx.currentTime,.1),a.ctx.listener.forwardY.setTargetAtTime(n,Howler.ctx.currentTime,.1),a.ctx.listener.forwardZ.setTargetAtTime(t,Howler.ctx.currentTime,.1),a.ctx.listener.upX.setTargetAtTime(r,Howler.ctx.currentTime,.1),a.ctx.listener.upY.setTargetAtTime(o,Howler.ctx.currentTime,.1),a.ctx.listener.upZ.setTargetAtTime(i,Howler.ctx.currentTime,.1)):a.ctx.listener.setOrientation(e,n,t,r,o,i),a)},Howl.prototype.init=function(e){return function(n){var t=this;return t._orientation=n.orientation||[1,0,0],t._stereo=n.stereo||null,t._pos=n.pos||null,t._pannerAttr={coneInnerAngle:void 0!==n.coneInnerAngle?n.coneInnerAngle:360,coneOuterAngle:void 0!==n.coneOuterAngle?n.coneOuterAngle:360,coneOuterGain:void 0!==n.coneOuterGain?n.coneOuterGain:0,distanceModel:void 0!==n.distanceModel?n.distanceModel:"inverse",maxDistance:void 0!==n.maxDistance?n.maxDistance:1e4,panningModel:void 0!==n.panningModel?n.panningModel:"HRTF",refDistance:void 0!==n.refDistance?n.refDistance:1,rolloffFactor:void 0!==n.rolloffFactor?n.rolloffFactor:1},t._onstereo=n.onstereo?[{fn:n.onstereo}]:[],t._onpos=n.onpos?[{fn:n.onpos}]:[],t._onorientation=n.onorientation?[{fn:n.onorientation}]:[],e.call(this,n)}}(Howl.prototype.init),Howl.prototype.stereo=function(n,t){var r=this;if(!r._webAudio)return r;if("loaded"!==r._state)return r._queue.push({event:"stereo",action:function(){r.stereo(n,t)}}),r;var o=void 0===Howler.ctx.createStereoPanner?"spatial":"stereo";if(void 0===t){if("number"!=typeof n)return r._stereo;r._stereo=n,r._pos=[n,0,0]}for(var i=r._getSoundIds(t),a=0;a<i.length;a++){var s=r._soundById(i[a]);if(s){if("number"!=typeof n)return s._stereo;s._stereo=n,s._pos=[n,0,0],s._node&&(s._pannerAttr.panningModel="equalpower",s._panner&&s._panner.pan||e(s,o),"spatial"===o?void 0!==s._panner.positionX?(s._panner.positionX.setValueAtTime(n,Howler.ctx.currentTime),s._panner.positionY.setValueAtTime(0,Howler.ctx.currentTime),s._panner.positionZ.setValueAtTime(0,Howler.ctx.currentTime)):s._panner.setPosition(n,0,0):s._panner.pan.setValueAtTime(n,Howler.ctx.currentTime)),r._emit("stereo",s._id)}}return r},Howl.prototype.pos=function(n,t,r,o){var i=this;if(!i._webAudio)return i;if("loaded"!==i._state)return i._queue.push({event:"pos",action:function(){i.pos(n,t,r,o)}}),i;if(t="number"!=typeof t?0:t,r="number"!=typeof r?-.5:r,void 0===o){if("number"!=typeof n)return i._pos;i._pos=[n,t,r]}for(var a=i._getSoundIds(o),s=0;s<a.length;s++){var p=i._soundById(a[s]);if(p){if("number"!=typeof n)return p._pos;p._pos=[n,t,r],p._node&&(p._panner&&!p._panner.pan||e(p,"spatial"),void 0!==p._panner.positionX?(p._panner.positionX.setValueAtTime(n,Howler.ctx.currentTime),p._panner.positionY.setValueAtTime(t,Howler.ctx.currentTime),p._panner.positionZ.setValueAtTime(r,Howler.ctx.currentTime)):p._panner.setPosition(n,t,r)),i._emit("pos",p._id)}}return i},Howl.prototype.orientation=function(n,t,r,o){var i=this;if(!i._webAudio)return i;if("loaded"!==i._state)return i._queue.push({event:"orientation",action:function(){i.orientation(n,t,r,o)}}),i;if(t="number"!=typeof t?i._orientation[1]:t,r="number"!=typeof r?i._orientation[2]:r,void 0===o){if("number"!=typeof n)return i._orientation;i._orientation=[n,t,r]}for(var a=i._getSoundIds(o),s=0;s<a.length;s++){var p=i._soundById(a[s]);if(p){if("number"!=typeof n)return p._orientation;p._orientation=[n,t,r],p._node&&(p._panner||(p._pos||(p._pos=i._pos||[0,0,-.5]),e(p,"spatial")),void 0!==p._panner.orientationX?(p._panner.orientationX.setValueAtTime(n,Howler.ctx.currentTime),p._panner.orientationY.setValueAtTime(t,Howler.ctx.currentTime),p._panner.orientationZ.setValueAtTime(r,Howler.ctx.currentTime)):p._panner.setOrientation(n,t,r)),i._emit("orientation",p._id)}}return i},Howl.prototype.pannerAttr=function(){var n,t,r,o=this,i=arguments;if(!o._webAudio)return o;if(0===i.length)return o._pannerAttr;if(1===i.length){if("object"!=typeof i[0])return r=o._soundById(parseInt(i[0],10)),r?r._pannerAttr:o._pannerAttr;n=i[0],void 0===t&&(n.pannerAttr||(n.pannerAttr={coneInnerAngle:n.coneInnerAngle,coneOuterAngle:n.coneOuterAngle,coneOuterGain:n.coneOuterGain,distanceModel:n.distanceModel,maxDistance:n.maxDistance,refDistance:n.refDistance,rolloffFactor:n.rolloffFactor,panningModel:n.panningModel}),o._pannerAttr={coneInnerAngle:void 0!==n.pannerAttr.coneInnerAngle?n.pannerAttr.coneInnerAngle:o._coneInnerAngle,coneOuterAngle:void 0!==n.pannerAttr.coneOuterAngle?n.pannerAttr.coneOuterAngle:o._coneOuterAngle,coneOuterGain:void 0!==n.pannerAttr.coneOuterGain?n.pannerAttr.coneOuterGain:o._coneOuterGain,distanceModel:void 0!==n.pannerAttr.distanceModel?n.pannerAttr.distanceModel:o._distanceModel,maxDistance:void 0!==n.pannerAttr.maxDistance?n.pannerAttr.maxDistance:o._maxDistance,refDistance:void 0!==n.pannerAttr.refDistance?n.pannerAttr.refDistance:o._refDistance,rolloffFactor:void 0!==n.pannerAttr.rolloffFactor?n.pannerAttr.rolloffFactor:o._rolloffFactor,panningModel:void 0!==n.pannerAttr.panningModel?n.pannerAttr.panningModel:o._panningModel})}else 2===i.length&&(n=i[0],t=parseInt(i[1],10));for(var a=o._getSoundIds(t),s=0;s<a.length;s++)if(r=o._soundById(a[s])){var p=r._pannerAttr;p={coneInnerAngle:void 0!==n.coneInnerAngle?n.coneInnerAngle:p.coneInnerAngle,coneOuterAngle:void 0!==n.coneOuterAngle?n.coneOuterAngle:p.coneOuterAngle,coneOuterGain:void 0!==n.coneOuterGain?n.coneOuterGain:p.coneOuterGain,distanceModel:void 0!==n.distanceModel?n.distanceModel:p.distanceModel,maxDistance:void 0!==n.maxDistance?n.maxDistance:p.maxDistance,refDistance:void 0!==n.refDistance?n.refDistance:p.refDistance,rolloffFactor:void 0!==n.rolloffFactor?n.rolloffFactor:p.rolloffFactor,panningModel:void 0!==n.panningModel?n.panningModel:p.panningModel};var c=r._panner;c?(c.coneInnerAngle=p.coneInnerAngle,c.coneOuterAngle=p.coneOuterAngle,c.coneOuterGain=p.coneOuterGain,c.distanceModel=p.distanceModel,c.maxDistance=p.maxDistance,c.refDistance=p.refDistance,c.rolloffFactor=p.rolloffFactor,c.panningModel=p.panningModel):(r._pos||(r._pos=o._pos||[0,0,-.5]),e(r,"spatial"))}return o},Sound.prototype.init=function(e){return function(){var n=this,t=n._parent;n._orientation=t._orientation,n._stereo=t._stereo,n._pos=t._pos,n._pannerAttr=t._pannerAttr,e.call(this),n._stereo?t.stereo(n._stereo):n._pos&&t.pos(n._pos[0],n._pos[1],n._pos[2],n._id)}}(Sound.prototype.init),Sound.prototype.reset=function(e){return function(){var n=this,t=n._parent;return n._orientation=t._orientation,n._stereo=t._stereo,n._pos=t._pos,n._pannerAttr=t._pannerAttr,n._stereo?t.stereo(n._stereo):n._pos?t.pos(n._pos[0],n._pos[1],n._pos[2],n._id):n._panner&&(n._panner.disconnect(0),n._panner=void 0,t._refreshBuffer(n)),e.call(this)}}(Sound.prototype.reset);var e=function(e,n){n=n||"spatial","spatial"===n?(e._panner=Howler.ctx.createPanner(),e._panner.coneInnerAngle=e._pannerAttr.coneInnerAngle,e._panner.coneOuterAngle=e._pannerAttr.coneOuterAngle,e._panner.coneOuterGain=e._pannerAttr.coneOuterGain,e._panner.distanceModel=e._pannerAttr.distanceModel,e._panner.maxDistance=e._pannerAttr.maxDistance,e._panner.refDistance=e._pannerAttr.refDistance,e._panner.rolloffFactor=e._pannerAttr.rolloffFactor,e._panner.panningModel=e._pannerAttr.panningModel,void 0!==e._panner.positionX?(e._panner.positionX.setValueAtTime(e._pos[0],Howler.ctx.currentTime),e._panner.positionY.setValueAtTime(e._pos[1],Howler.ctx.currentTime),e._panner.positionZ.setValueAtTime(e._pos[2],Howler.ctx.currentTime)):e._panner.setPosition(e._pos[0],e._pos[1],e._pos[2]),void 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		exports["Hls"] = factory();
	else
		root["Hls"] = factory();
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/***/ "./src/config.ts":
/*!***********************!*\
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/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

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/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "enableStreamingMode": () => (/* binding */ enableStreamingMode),
/* harmony export */   "hlsDefaultConfig": () => (/* binding */ hlsDefaultConfig),
/* harmony export */   "mergeConfig": () => (/* binding */ mergeConfig)
/* harmony export */ });
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/* harmony import */ var _controller_audio_track_controller__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./controller/audio-track-controller */ "./src/controller/audio-track-controller.ts");
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/* harmony import */ var _controller_timeline_controller__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ./controller/timeline-controller */ "./src/controller/timeline-controller.ts");
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// If possible, keep hlsDefaultConfig shallow
// It is cloned whenever a new Hls instance is created, by keeping the config
// shallow the properties are cloned, and we don't end up manipulating the default
var hlsDefaultConfig = _objectSpread(_objectSpread({
  autoStartLoad: true,
  // used by stream-controller
  startPosition: -1,
  // used by stream-controller
  defaultAudioCodec: undefined,
  // used by stream-controller
  debug: false,
  // used by logger
  capLevelOnFPSDrop: false,
  // used by fps-controller
  capLevelToPlayerSize: false,
  // used by cap-level-controller
  ignoreDevicePixelRatio: false,
  // used by cap-level-controller
  initialLiveManifestSize: 1,
  // used by stream-controller
  maxBufferLength: 30,
  // used by stream-controller
  backBufferLength: Infinity,
  // used by buffer-controller
  maxBufferSize: 60 * 1000 * 1000,
  // used by stream-controller
  maxBufferHole: 0.1,
  // used by stream-controller
  highBufferWatchdogPeriod: 2,
  // used by stream-controller
  nudgeOffset: 0.1,
  // used by stream-controller
  nudgeMaxRetry: 3,
  // used by stream-controller
  maxFragLookUpTolerance: 0.25,
  // used by stream-controller
  liveSyncDurationCount: 3,
  // used by latency-controller
  liveMaxLatencyDurationCount: Infinity,
  // used by latency-controller
  liveSyncDuration: undefined,
  // used by latency-controller
  liveMaxLatencyDuration: undefined,
  // used by latency-controller
  maxLiveSyncPlaybackRate: 1,
  // used by latency-controller
  liveDurationInfinity: false,
  // used by buffer-controller
  liveBackBufferLength: null,
  // used by buffer-controller
  maxMaxBufferLength: 600,
  // used by stream-controller
  enableWorker: true,
  // used by demuxer
  enableSoftwareAES: true,
  // used by decrypter
  manifestLoadingTimeOut: 10000,
  // used by playlist-loader
  manifestLoadingMaxRetry: 1,
  // used by playlist-loader
  manifestLoadingRetryDelay: 1000,
  // used by playlist-loader
  manifestLoadingMaxRetryTimeout: 64000,
  // used by playlist-loader
  startLevel: undefined,
  // used by level-controller
  levelLoadingTimeOut: 10000,
  // used by playlist-loader
  levelLoadingMaxRetry: 4,
  // used by playlist-loader
  levelLoadingRetryDelay: 1000,
  // used by playlist-loader
  levelLoadingMaxRetryTimeout: 64000,
  // used by playlist-loader
  fragLoadingTimeOut: 20000,
  // used by fragment-loader
  fragLoadingMaxRetry: 6,
  // used by fragment-loader
  fragLoadingRetryDelay: 1000,
  // used by fragment-loader
  fragLoadingMaxRetryTimeout: 64000,
  // used by fragment-loader
  startFragPrefetch: false,
  // used by stream-controller
  fpsDroppedMonitoringPeriod: 5000,
  // used by fps-controller
  fpsDroppedMonitoringThreshold: 0.2,
  // used by fps-controller
  appendErrorMaxRetry: 3,
  // used by buffer-controller
  loader: _utils_xhr_loader__WEBPACK_IMPORTED_MODULE_11__["default"],
  // loader: FetchLoader,
  fLoader: undefined,
  // used by fragment-loader
  pLoader: undefined,
  // used by playlist-loader
  xhrSetup: undefined,
  // used by xhr-loader
  licenseXhrSetup: undefined,
  // used by eme-controller
  licenseResponseCallback: undefined,
  // used by eme-controller
  abrController: _controller_abr_controller__WEBPACK_IMPORTED_MODULE_0__["default"],
  bufferController: _controller_buffer_controller__WEBPACK_IMPORTED_MODULE_5__["default"],
  capLevelController: _controller_cap_level_controller__WEBPACK_IMPORTED_MODULE_7__["default"],
  fpsController: _controller_fps_controller__WEBPACK_IMPORTED_MODULE_8__["default"],
  stretchShortVideoTrack: false,
  // used by mp4-remuxer
  maxAudioFramesDrift: 1,
  // used by mp4-remuxer
  forceKeyFrameOnDiscontinuity: true,
  // used by ts-demuxer
  abrEwmaFastLive: 3,
  // used by abr-controller
  abrEwmaSlowLive: 9,
  // used by abr-controller
  abrEwmaFastVoD: 3,
  // used by abr-controller
  abrEwmaSlowVoD: 9,
  // used by abr-controller
  abrEwmaDefaultEstimate: 5e5,
  // 500 kbps  // used by abr-controller
  abrBandWidthFactor: 0.95,
  // used by abr-controller
  abrBandWidthUpFactor: 0.7,
  // used by abr-controller
  abrMaxWithRealBitrate: false,
  // used by abr-controller
  maxStarvationDelay: 4,
  // used by abr-controller
  maxLoadingDelay: 4,
  // used by abr-controller
  minAutoBitrate: 0,
  // used by hls
  emeEnabled: false,
  // used by eme-controller
  widevineLicenseUrl: undefined,
  // used by eme-controller
  drmSystems: {},
  // used by eme-controller
  drmSystemOptions: {},
  // used by eme-controller
  requestMediaKeySystemAccessFunc: _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_14__.requestMediaKeySystemAccess,
  // used by eme-controller
  testBandwidth: true,
  progressive: false,
  lowLatencyMode: true,
  cmcd: undefined,
  enableDateRangeMetadataCues: true,
  enableEmsgMetadataCues: true,
  enableID3MetadataCues: true
}, timelineConfig()), {}, {
  subtitleStreamController:  true ? _controller_subtitle_stream_controller__WEBPACK_IMPORTED_MODULE_3__.SubtitleStreamController : 0,
  subtitleTrackController:  true ? _controller_subtitle_track_controller__WEBPACK_IMPORTED_MODULE_4__["default"] : 0,
  timelineController:  true ? _controller_timeline_controller__WEBPACK_IMPORTED_MODULE_6__.TimelineController : 0,
  audioStreamController:  true ? _controller_audio_stream_controller__WEBPACK_IMPORTED_MODULE_1__["default"] : 0,
  audioTrackController:  true ? _controller_audio_track_controller__WEBPACK_IMPORTED_MODULE_2__["default"] : 0,
  emeController:  true ? _controller_eme_controller__WEBPACK_IMPORTED_MODULE_9__["default"] : 0,
  cmcdController:  true ? _controller_cmcd_controller__WEBPACK_IMPORTED_MODULE_10__["default"] : 0
});
function timelineConfig() {
  return {
    cueHandler: _utils_cues__WEBPACK_IMPORTED_MODULE_13__["default"],
    // used by timeline-controller
    enableWebVTT: true,
    // used by timeline-controller
    enableIMSC1: true,
    // used by timeline-controller
    enableCEA708Captions: true,
    // used by timeline-controller
    captionsTextTrack1Label: 'English',
    // used by timeline-controller
    captionsTextTrack1LanguageCode: 'en',
    // used by timeline-controller
    captionsTextTrack2Label: 'Spanish',
    // used by timeline-controller
    captionsTextTrack2LanguageCode: 'es',
    // used by timeline-controller
    captionsTextTrack3Label: 'Unknown CC',
    // used by timeline-controller
    captionsTextTrack3LanguageCode: '',
    // used by timeline-controller
    captionsTextTrack4Label: 'Unknown CC',
    // used by timeline-controller
    captionsTextTrack4LanguageCode: '',
    // used by timeline-controller
    renderTextTracksNatively: true
  };
}
function mergeConfig(defaultConfig, userConfig) {
  if ((userConfig.liveSyncDurationCount || userConfig.liveMaxLatencyDurationCount) && (userConfig.liveSyncDuration || userConfig.liveMaxLatencyDuration)) {
    throw new Error("Illegal hls.js config: don't mix up liveSyncDurationCount/liveMaxLatencyDurationCount and liveSyncDuration/liveMaxLatencyDuration");
  }
  if (userConfig.liveMaxLatencyDurationCount !== undefined && (userConfig.liveSyncDurationCount === undefined || userConfig.liveMaxLatencyDurationCount <= userConfig.liveSyncDurationCount)) {
    throw new Error('Illegal hls.js config: "liveMaxLatencyDurationCount" must be greater than "liveSyncDurationCount"');
  }
  if (userConfig.liveMaxLatencyDuration !== undefined && (userConfig.liveSyncDuration === undefined || userConfig.liveMaxLatencyDuration <= userConfig.liveSyncDuration)) {
    throw new Error('Illegal hls.js config: "liveMaxLatencyDuration" must be greater than "liveSyncDuration"');
  }
  return _extends({}, defaultConfig, userConfig);
}
function enableStreamingMode(config) {
  var currentLoader = config.loader;
  if (currentLoader !== _utils_fetch_loader__WEBPACK_IMPORTED_MODULE_12__["default"] && currentLoader !== _utils_xhr_loader__WEBPACK_IMPORTED_MODULE_11__["default"]) {
    // If a developer has configured their own loader, respect that choice
    _utils_logger__WEBPACK_IMPORTED_MODULE_15__.logger.log('[config]: Custom loader detected, cannot enable progressive streaming');
    config.progressive = false;
  } else {
    var canStreamProgressively = (0,_utils_fetch_loader__WEBPACK_IMPORTED_MODULE_12__.fetchSupported)();
    if (canStreamProgressively) {
      config.loader = _utils_fetch_loader__WEBPACK_IMPORTED_MODULE_12__["default"];
      config.progressive = true;
      config.enableSoftwareAES = true;
      _utils_logger__WEBPACK_IMPORTED_MODULE_15__.logger.log('[config]: Progressive streaming enabled, using FetchLoader');
    }
  }
}

/***/ }),

/***/ "./src/controller/abr-controller.ts":
/*!******************************************!*\
  !*** ./src/controller/abr-controller.ts ***!
  \******************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _utils_ewma_bandwidth_estimator__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../utils/ewma-bandwidth-estimator */ "./src/utils/ewma-bandwidth-estimator.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");



function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }





var AbrController = /*#__PURE__*/function () {
  function AbrController(hls) {
    this.hls = void 0;
    this.lastLoadedFragLevel = 0;
    this._nextAutoLevel = -1;
    this.timer = void 0;
    this.onCheck = this._abandonRulesCheck.bind(this);
    this.fragCurrent = null;
    this.partCurrent = null;
    this.bitrateTestDelay = 0;
    this.bwEstimator = void 0;
    this.hls = hls;
    var config = hls.config;
    this.bwEstimator = new _utils_ewma_bandwidth_estimator__WEBPACK_IMPORTED_MODULE_1__["default"](config.abrEwmaSlowVoD, config.abrEwmaFastVoD, config.abrEwmaDefaultEstimate);
    this.registerListeners();
  }
  var _proto = AbrController.prototype;
  _proto.registerListeners = function registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_LOADING, this.onFragLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_LOADED, this.onFragLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_BUFFERED, this.onFragBuffered, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.LEVEL_LOADED, this.onLevelLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.ERROR, this.onError, this);
  };
  _proto.unregisterListeners = function unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_LOADING, this.onFragLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_LOADED, this.onFragLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_BUFFERED, this.onFragBuffered, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.LEVEL_LOADED, this.onLevelLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.ERROR, this.onError, this);
  };
  _proto.destroy = function destroy() {
    this.unregisterListeners();
    this.clearTimer();
    // @ts-ignore
    this.hls = this.onCheck = null;
    this.fragCurrent = this.partCurrent = null;
  };
  _proto.onFragLoading = function onFragLoading(event, data) {
    var frag = data.frag;
    if (frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_4__.PlaylistLevelType.MAIN) {
      if (!this.timer) {
        var _data$part;
        this.fragCurrent = frag;
        this.partCurrent = (_data$part = data.part) != null ? _data$part : null;
        this.timer = self.setInterval(this.onCheck, 100);
      }
    }
  };
  _proto.onLevelLoaded = function onLevelLoaded(event, data) {
    var config = this.hls.config;
    if (data.details.live) {
      this.bwEstimator.update(config.abrEwmaSlowLive, config.abrEwmaFastLive);
    } else {
      this.bwEstimator.update(config.abrEwmaSlowVoD, config.abrEwmaFastVoD);
    }
  }

  /*
      This method monitors the download rate of the current fragment, and will downswitch if that fragment will not load
      quickly enough to prevent underbuffering
    */;
  _proto._abandonRulesCheck = function _abandonRulesCheck() {
    var frag = this.fragCurrent,
      part = this.partCurrent,
      hls = this.hls;
    var autoLevelEnabled = hls.autoLevelEnabled,
      media = hls.media;
    if (!frag || !media) {
      return;
    }
    var stats = part ? part.stats : frag.stats;
    var duration = part ? part.duration : frag.duration;
    // If frag loading is aborted, complete, or from lowest level, stop timer and return
    if (stats.aborted || stats.loaded && stats.loaded === stats.total || frag.level === 0) {
      this.clearTimer();
      // reset forced auto level value so that next level will be selected
      this._nextAutoLevel = -1;
      return;
    }

    // This check only runs if we're in ABR mode and actually playing
    if (!autoLevelEnabled || media.paused || !media.playbackRate || !media.readyState) {
      return;
    }
    var bufferInfo = hls.mainForwardBufferInfo;
    if (bufferInfo === null) {
      return;
    }
    var requestDelay = performance.now() - stats.loading.start;
    var playbackRate = Math.abs(media.playbackRate);
    // In order to work with a stable bandwidth, only begin monitoring bandwidth after half of the fragment has been loaded
    if (requestDelay <= 500 * duration / playbackRate) {
      return;
    }
    var loadedFirstByte = stats.loaded && stats.loading.first;
    var bwEstimate = this.bwEstimator.getEstimate();
    var levels = hls.levels,
      minAutoLevel = hls.minAutoLevel;
    var level = levels[frag.level];
    var expectedLen = stats.total || Math.max(stats.loaded, Math.round(duration * level.maxBitrate / 8));
    var loadRate = loadedFirstByte ? stats.loaded * 1000 / requestDelay : 0;

    // fragLoadDelay is an estimate of the time (in seconds) it will take to buffer the remainder of the fragment
    var fragLoadedDelay = loadRate ? (expectedLen - stats.loaded) / loadRate : expectedLen * 8 / bwEstimate;

    // bufferStarvationDelay is an estimate of the amount time (in seconds) it will take to exhaust the buffer
    var bufferStarvationDelay = bufferInfo.len / playbackRate;

    // Only downswitch if the time to finish loading the current fragment is greater than the amount of buffer left
    if (fragLoadedDelay <= bufferStarvationDelay) {
      return;
    }
    var fragLevelNextLoadedDelay = Number.POSITIVE_INFINITY;
    var nextLoadLevel;
    // Iterate through lower level and try to find the largest one that avoids rebuffering
    for (nextLoadLevel = frag.level - 1; nextLoadLevel > minAutoLevel; nextLoadLevel--) {
      // compute time to load next fragment at lower level
      // 0.8 : consider only 80% of current bw to be conservative
      // 8 = bits per byte (bps/Bps)
      var levelNextBitrate = levels[nextLoadLevel].maxBitrate;
      fragLevelNextLoadedDelay = loadRate ? duration * levelNextBitrate / (8 * 0.8 * loadRate) : duration * levelNextBitrate / bwEstimate;
      if (fragLevelNextLoadedDelay < bufferStarvationDelay) {
        break;
      }
    }
    // Only emergency switch down if it takes less time to load a new fragment at lowest level instead of continuing
    // to load the current one
    if (fragLevelNextLoadedDelay >= fragLoadedDelay) {
      return;
    }
    _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.warn("Fragment " + frag.sn + (part ? ' part ' + part.index : '') + " of level " + frag.level + " is loading too slowly and will cause an underbuffer; aborting and switching to level " + nextLoadLevel + "\n      Current BW estimate: " + ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(bwEstimate) ? (bwEstimate / 1024).toFixed(3) : 'Unknown') + " Kb/s\n      Estimated load time for current fragment: " + fragLoadedDelay.toFixed(3) + " s\n      Estimated load time for the next fragment: " + fragLevelNextLoadedDelay.toFixed(3) + " s\n      Time to underbuffer: " + bufferStarvationDelay.toFixed(3) + " s");
    hls.nextLoadLevel = nextLoadLevel;
    if (loadedFirstByte) {
      // If there has been loading progress, sample bandwidth
      this.bwEstimator.sample(requestDelay, stats.loaded);
    }
    this.clearTimer();
    if (frag.loader || frag.keyLoader) {
      this.fragCurrent = this.partCurrent = null;
      frag.abortRequests();
    }
    hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_LOAD_EMERGENCY_ABORTED, {
      frag: frag,
      part: part,
      stats: stats
    });
  };
  _proto.onFragLoaded = function onFragLoaded(event, _ref) {
    var frag = _ref.frag,
      part = _ref.part;
    if (frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_4__.PlaylistLevelType.MAIN && (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(frag.sn)) {
      var stats = part ? part.stats : frag.stats;
      var duration = part ? part.duration : frag.duration;
      // stop monitoring bw once frag loaded
      this.clearTimer();
      // store level id after successful fragment load
      this.lastLoadedFragLevel = frag.level;
      // reset forced auto level value so that next level will be selected
      this._nextAutoLevel = -1;

      // compute level average bitrate
      if (this.hls.config.abrMaxWithRealBitrate) {
        var level = this.hls.levels[frag.level];
        var loadedBytes = (level.loaded ? level.loaded.bytes : 0) + stats.loaded;
        var loadedDuration = (level.loaded ? level.loaded.duration : 0) + duration;
        level.loaded = {
          bytes: loadedBytes,
          duration: loadedDuration
        };
        level.realBitrate = Math.round(8 * loadedBytes / loadedDuration);
      }
      if (frag.bitrateTest) {
        var fragBufferedData = {
          stats: stats,
          frag: frag,
          part: part,
          id: frag.type
        };
        this.onFragBuffered(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_BUFFERED, fragBufferedData);
      }
    }
  };
  _proto.onFragBuffered = function onFragBuffered(event, data) {
    var frag = data.frag,
      part = data.part;
    var stats = part ? part.stats : frag.stats;
    if (stats.aborted) {
      return;
    }
    // Only count non-alt-audio frags which were actually buffered in our BW calculations
    if (frag.type !== _types_loader__WEBPACK_IMPORTED_MODULE_4__.PlaylistLevelType.MAIN || frag.sn === 'initSegment') {
      return;
    }
    // Use the difference between parsing and request instead of buffering and request to compute fragLoadingProcessing;
    // rationale is that buffer appending only happens once media is attached. This can happen when config.startFragPrefetch
    // is used. If we used buffering in that case, our BW estimate sample will be very large.
    var processingMs = stats.parsing.end - stats.loading.start;
    this.bwEstimator.sample(processingMs, stats.loaded);
    stats.bwEstimate = this.bwEstimator.getEstimate();
    if (frag.bitrateTest) {
      this.bitrateTestDelay = processingMs / 1000;
    } else {
      this.bitrateTestDelay = 0;
    }
  };
  _proto.onError = function onError(event, data) {
    var _data$frag;
    // stop timer in case of frag loading error
    if (((_data$frag = data.frag) === null || _data$frag === void 0 ? void 0 : _data$frag.type) === _types_loader__WEBPACK_IMPORTED_MODULE_4__.PlaylistLevelType.MAIN) {
      if (data.type === _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorTypes.KEY_SYSTEM_ERROR) {
        this.clearTimer();
        return;
      }
      switch (data.details) {
        case _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorDetails.FRAG_LOAD_ERROR:
        case _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorDetails.FRAG_LOAD_TIMEOUT:
        case _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorDetails.KEY_LOAD_ERROR:
        case _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorDetails.KEY_LOAD_TIMEOUT:
          this.clearTimer();
          break;
        default:
          break;
      }
    }
  };
  _proto.clearTimer = function clearTimer() {
    self.clearInterval(this.timer);
    this.timer = undefined;
  }

  // return next auto level
  ;
  _proto.getNextABRAutoLevel = function getNextABRAutoLevel() {
    var fragCurrent = this.fragCurrent,
      partCurrent = this.partCurrent,
      hls = this.hls;
    var maxAutoLevel = hls.maxAutoLevel,
      config = hls.config,
      minAutoLevel = hls.minAutoLevel,
      media = hls.media;
    var currentFragDuration = partCurrent ? partCurrent.duration : fragCurrent ? fragCurrent.duration : 0;

    // playbackRate is the absolute value of the playback rate; if media.playbackRate is 0, we use 1 to load as
    // if we're playing back at the normal rate.
    var playbackRate = media && media.playbackRate !== 0 ? Math.abs(media.playbackRate) : 1.0;
    var avgbw = this.bwEstimator ? this.bwEstimator.getEstimate() : config.abrEwmaDefaultEstimate;
    // bufferStarvationDelay is the wall-clock time left until the playback buffer is exhausted.
    var bufferInfo = hls.mainForwardBufferInfo;
    var bufferStarvationDelay = (bufferInfo ? bufferInfo.len : 0) / playbackRate;

    // First, look to see if we can find a level matching with our avg bandwidth AND that could also guarantee no rebuffering at all
    var bestLevel = this.findBestLevel(avgbw, minAutoLevel, maxAutoLevel, bufferStarvationDelay, config.abrBandWidthFactor, config.abrBandWidthUpFactor);
    if (bestLevel >= 0) {
      return bestLevel;
    }
    _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.trace((bufferStarvationDelay ? 'rebuffering expected' : 'buffer is empty') + ", finding optimal quality level");
    // not possible to get rid of rebuffering ... let's try to find level that will guarantee less than maxStarvationDelay of rebuffering
    // if no matching level found, logic will return 0
    var maxStarvationDelay = currentFragDuration ? Math.min(currentFragDuration, config.maxStarvationDelay) : config.maxStarvationDelay;
    var bwFactor = config.abrBandWidthFactor;
    var bwUpFactor = config.abrBandWidthUpFactor;
    if (!bufferStarvationDelay) {
      // in case buffer is empty, let's check if previous fragment was loaded to perform a bitrate test
      var bitrateTestDelay = this.bitrateTestDelay;
      if (bitrateTestDelay) {
        // if it is the case, then we need to adjust our max starvation delay using maxLoadingDelay config value
        // max video loading delay used in  automatic start level selection :
        // in that mode ABR controller will ensure that video loading time (ie the time to fetch the first fragment at lowest quality level +
        // the time to fetch the fragment at the appropriate quality level is less than ```maxLoadingDelay``` )
        // cap maxLoadingDelay and ensure it is not bigger 'than bitrate test' frag duration
        var maxLoadingDelay = currentFragDuration ? Math.min(currentFragDuration, config.maxLoadingDelay) : config.maxLoadingDelay;
        maxStarvationDelay = maxLoadingDelay - bitrateTestDelay;
        _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.trace("bitrate test took " + Math.round(1000 * bitrateTestDelay) + "ms, set first fragment max fetchDuration to " + Math.round(1000 * maxStarvationDelay) + " ms");
        // don't use conservative factor on bitrate test
        bwFactor = bwUpFactor = 1;
      }
    }
    bestLevel = this.findBestLevel(avgbw, minAutoLevel, maxAutoLevel, bufferStarvationDelay + maxStarvationDelay, bwFactor, bwUpFactor);
    return Math.max(bestLevel, 0);
  };
  _proto.findBestLevel = function findBestLevel(currentBw, minAutoLevel, maxAutoLevel, maxFetchDuration, bwFactor, bwUpFactor) {
    var _level$details;
    var fragCurrent = this.fragCurrent,
      partCurrent = this.partCurrent,
      currentLevel = this.lastLoadedFragLevel;
    var levels = this.hls.levels;
    var level = levels[currentLevel];
    var live = !!(level !== null && level !== void 0 && (_level$details = level.details) !== null && _level$details !== void 0 && _level$details.live);
    var currentCodecSet = level === null || level === void 0 ? void 0 : level.codecSet;
    var currentFragDuration = partCurrent ? partCurrent.duration : fragCurrent ? fragCurrent.duration : 0;
    for (var i = maxAutoLevel; i >= minAutoLevel; i--) {
      var levelInfo = levels[i];
      if (!levelInfo || currentCodecSet && levelInfo.codecSet !== currentCodecSet) {
        continue;
      }
      var levelDetails = levelInfo.details;
      var avgDuration = (partCurrent ? levelDetails === null || levelDetails === void 0 ? void 0 : levelDetails.partTarget : levelDetails === null || levelDetails === void 0 ? void 0 : levelDetails.averagetargetduration) || currentFragDuration;
      var adjustedbw = void 0;
      // follow algorithm captured from stagefright :
      // https://android.googlesource.com/platform/frameworks/av/+/master/media/libstagefright/httplive/LiveSession.cpp
      // Pick the highest bandwidth stream below or equal to estimated bandwidth.
      // consider only 80% of the available bandwidth, but if we are switching up,
      // be even more conservative (70%) to avoid overestimating and immediately
      // switching back.
      if (i <= currentLevel) {
        adjustedbw = bwFactor * currentBw;
      } else {
        adjustedbw = bwUpFactor * currentBw;
      }
      var bitrate = levels[i].maxBitrate;
      var fetchDuration = bitrate * avgDuration / adjustedbw;
      _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.trace("level/adjustedbw/bitrate/avgDuration/maxFetchDuration/fetchDuration: " + i + "/" + Math.round(adjustedbw) + "/" + bitrate + "/" + avgDuration + "/" + maxFetchDuration + "/" + fetchDuration);
      // if adjusted bw is greater than level bitrate AND
      if (adjustedbw > bitrate && (
      // fragment fetchDuration unknown OR live stream OR fragment fetchDuration less than max allowed fetch duration, then this level matches
      // we don't account for max Fetch Duration for live streams, this is to avoid switching down when near the edge of live sliding window ...
      // special case to support startLevel = -1 (bitrateTest) on live streams : in that case we should not exit loop so that findBestLevel will return -1
      fetchDuration === 0 || !(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(fetchDuration) || live && !this.bitrateTestDelay || fetchDuration < maxFetchDuration)) {
        // as we are looping from highest to lowest, this will return the best achievable quality level
        return i;
      }
    }
    // not enough time budget even with quality level 0 ... rebuffering might happen
    return -1;
  };
  _createClass(AbrController, [{
    key: "nextAutoLevel",
    get: function get() {
      var forcedAutoLevel = this._nextAutoLevel;
      var bwEstimator = this.bwEstimator;
      // in case next auto level has been forced, and bw not available or not reliable, return forced value
      if (forcedAutoLevel !== -1 && !bwEstimator.canEstimate()) {
        return forcedAutoLevel;
      }

      // compute next level using ABR logic
      var nextABRAutoLevel = this.getNextABRAutoLevel();
      // use forced auto level when ABR selected level has errored
      if (forcedAutoLevel !== -1 && this.hls.levels[nextABRAutoLevel].loadError) {
        return forcedAutoLevel;
      }
      // if forced auto level has been defined, use it to cap ABR computed quality level
      if (forcedAutoLevel !== -1) {
        nextABRAutoLevel = Math.min(forcedAutoLevel, nextABRAutoLevel);
      }
      return nextABRAutoLevel;
    },
    set: function set(nextLevel) {
      this._nextAutoLevel = nextLevel;
    }
  }]);
  return AbrController;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (AbrController);

/***/ }),

/***/ "./src/controller/audio-stream-controller.ts":
/*!***************************************************!*\
  !*** ./src/controller/audio-stream-controller.ts ***!
  \***************************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./base-stream-controller */ "./src/controller/base-stream-controller.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/buffer-helper */ "./src/utils/buffer-helper.ts");
/* harmony import */ var _fragment_tracker__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ./fragment-tracker */ "./src/controller/fragment-tracker.ts");
/* harmony import */ var _types_level__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../types/level */ "./src/types/level.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");
/* harmony import */ var _loader_fragment__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ../loader/fragment */ "./src/loader/fragment.ts");
/* harmony import */ var _demux_chunk_cache__WEBPACK_IMPORTED_MODULE_8__ = __webpack_require__(/*! ../demux/chunk-cache */ "./src/demux/chunk-cache.ts");
/* harmony import */ var _demux_transmuxer_interface__WEBPACK_IMPORTED_MODULE_9__ = __webpack_require__(/*! ../demux/transmuxer-interface */ "./src/demux/transmuxer-interface.ts");
/* harmony import */ var _types_transmuxer__WEBPACK_IMPORTED_MODULE_10__ = __webpack_require__(/*! ../types/transmuxer */ "./src/types/transmuxer.ts");
/* harmony import */ var _fragment_finders__WEBPACK_IMPORTED_MODULE_11__ = __webpack_require__(/*! ./fragment-finders */ "./src/controller/fragment-finders.ts");
/* harmony import */ var _utils_discontinuities__WEBPACK_IMPORTED_MODULE_12__ = __webpack_require__(/*! ../utils/discontinuities */ "./src/utils/discontinuities.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_13__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");

function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }













var TICK_INTERVAL = 100; // how often to tick in ms
var AudioStreamController = /*#__PURE__*/function (_BaseStreamController) {
  _inheritsLoose(AudioStreamController, _BaseStreamController);
  function AudioStreamController(hls, fragmentTracker, keyLoader) {
    var _this;
    _this = _BaseStreamController.call(this, hls, fragmentTracker, keyLoader, '[audio-stream-controller]') || this;
    _this.videoBuffer = null;
    _this.videoTrackCC = -1;
    _this.waitingVideoCC = -1;
    _this.audioSwitch = false;
    _this.trackId = -1;
    _this.waitingData = null;
    _this.mainDetails = null;
    _this.bufferFlushed = false;
    _this.cachedTrackLoadedData = null;
    _this._registerListeners();
    return _this;
  }
  var _proto = AudioStreamController.prototype;
  _proto.onHandlerDestroying = function onHandlerDestroying() {
    this._unregisterListeners();
    this.mainDetails = null;
  };
  _proto._registerListeners = function _registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.LEVEL_LOADED, this.onLevelLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.AUDIO_TRACKS_UPDATED, this.onAudioTracksUpdated, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.AUDIO_TRACK_SWITCHING, this.onAudioTrackSwitching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.AUDIO_TRACK_LOADED, this.onAudioTrackLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.ERROR, this.onError, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.BUFFER_RESET, this.onBufferReset, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.BUFFER_CREATED, this.onBufferCreated, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.BUFFER_FLUSHED, this.onBufferFlushed, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.INIT_PTS_FOUND, this.onInitPtsFound, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_BUFFERED, this.onFragBuffered, this);
  };
  _proto._unregisterListeners = function _unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.LEVEL_LOADED, this.onLevelLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.AUDIO_TRACKS_UPDATED, this.onAudioTracksUpdated, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.AUDIO_TRACK_SWITCHING, this.onAudioTrackSwitching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.AUDIO_TRACK_LOADED, this.onAudioTrackLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.ERROR, this.onError, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.BUFFER_RESET, this.onBufferReset, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.BUFFER_CREATED, this.onBufferCreated, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.BUFFER_FLUSHED, this.onBufferFlushed, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.INIT_PTS_FOUND, this.onInitPtsFound, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_BUFFERED, this.onFragBuffered, this);
  }

  // INIT_PTS_FOUND is triggered when the video track parsed in the stream-controller has a new PTS value
  ;
  _proto.onInitPtsFound = function onInitPtsFound(event, _ref) {
    var frag = _ref.frag,
      id = _ref.id,
      initPTS = _ref.initPTS;
    // Always update the new INIT PTS
    // Can change due level switch
    if (id === 'main') {
      var cc = frag.cc;
      this.initPTS[frag.cc] = initPTS;
      this.log("InitPTS for cc: " + cc + " found from main: " + initPTS);
      this.videoTrackCC = cc;
      // If we are waiting, tick immediately to unblock audio fragment transmuxing
      if (this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_INIT_PTS) {
        this.tick();
      }
    }
  };
  _proto.startLoad = function startLoad(startPosition) {
    if (!this.levels) {
      this.startPosition = startPosition;
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.STOPPED;
      return;
    }
    var lastCurrentTime = this.lastCurrentTime;
    this.stopLoad();
    this.setInterval(TICK_INTERVAL);
    this.fragLoadError = 0;
    if (lastCurrentTime > 0 && startPosition === -1) {
      this.log("Override startPosition with lastCurrentTime @" + lastCurrentTime.toFixed(3));
      startPosition = lastCurrentTime;
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
    } else {
      this.loadedmetadata = false;
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_TRACK;
    }
    this.nextLoadPosition = this.startPosition = this.lastCurrentTime = startPosition;
    this.tick();
  };
  _proto.doTick = function doTick() {
    switch (this.state) {
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE:
        this.doTickIdle();
        break;
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_TRACK:
        {
          var _levels$trackId;
          var levels = this.levels,
            trackId = this.trackId;
          var details = levels === null || levels === void 0 ? void 0 : (_levels$trackId = levels[trackId]) === null || _levels$trackId === void 0 ? void 0 : _levels$trackId.details;
          if (details) {
            if (this.waitForCdnTuneIn(details)) {
              break;
            }
            this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_INIT_PTS;
          }
          break;
        }
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.FRAG_LOADING_WAITING_RETRY:
        {
          var _this$media;
          var now = performance.now();
          var retryDate = this.retryDate;
          // if current time is gt than retryDate, or if media seeking let's switch to IDLE state to retry loading
          if (!retryDate || now >= retryDate || (_this$media = this.media) !== null && _this$media !== void 0 && _this$media.seeking) {
            this.log('RetryDate reached, switch back to IDLE state');
            this.resetStartWhenNotLoaded(this.trackId);
            this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
          }
          break;
        }
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_INIT_PTS:
        {
          // Ensure we don't get stuck in the WAITING_INIT_PTS state if the waiting frag CC doesn't match any initPTS
          var waitingData = this.waitingData;
          if (waitingData) {
            var frag = waitingData.frag,
              part = waitingData.part,
              cache = waitingData.cache,
              complete = waitingData.complete;
            if (this.initPTS[frag.cc] !== undefined) {
              this.waitingData = null;
              this.waitingVideoCC = -1;
              this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.FRAG_LOADING;
              var payload = cache.flush();
              var data = {
                frag: frag,
                part: part,
                payload: payload,
                networkDetails: null
              };
              this._handleFragmentLoadProgress(data);
              if (complete) {
                _BaseStreamController.prototype._handleFragmentLoadComplete.call(this, data);
              }
            } else if (this.videoTrackCC !== this.waitingVideoCC) {
              // Drop waiting fragment if videoTrackCC has changed since waitingFragment was set and initPTS was not found
              this.log("Waiting fragment cc (" + frag.cc + ") cancelled because video is at cc " + this.videoTrackCC);
              this.clearWaitingFragment();
            } else {
              // Drop waiting fragment if an earlier fragment is needed
              var pos = this.getLoadPosition();
              var bufferInfo = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_3__.BufferHelper.bufferInfo(this.mediaBuffer, pos, this.config.maxBufferHole);
              var waitingFragmentAtPosition = (0,_fragment_finders__WEBPACK_IMPORTED_MODULE_11__.fragmentWithinToleranceTest)(bufferInfo.end, this.config.maxFragLookUpTolerance, frag);
              if (waitingFragmentAtPosition < 0) {
                this.log("Waiting fragment cc (" + frag.cc + ") @ " + frag.start + " cancelled because another fragment at " + bufferInfo.end + " is needed");
                this.clearWaitingFragment();
              }
            }
          } else {
            this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
          }
        }
    }
    this.onTickEnd();
  };
  _proto.clearWaitingFragment = function clearWaitingFragment() {
    var waitingData = this.waitingData;
    if (waitingData) {
      this.fragmentTracker.removeFragment(waitingData.frag);
      this.waitingData = null;
      this.waitingVideoCC = -1;
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
    }
  };
  _proto.resetLoadingState = function resetLoadingState() {
    this.clearWaitingFragment();
    _BaseStreamController.prototype.resetLoadingState.call(this);
  };
  _proto.onTickEnd = function onTickEnd() {
    var media = this.media;
    if (!media || !media.readyState) {
      // Exit early if we don't have media or if the media hasn't buffered anything yet (readyState 0)
      return;
    }
    this.lastCurrentTime = media.currentTime;
  };
  _proto.doTickIdle = function doTickIdle() {
    var hls = this.hls,
      levels = this.levels,
      media = this.media,
      trackId = this.trackId;
    var config = hls.config;
    if (!levels || !levels[trackId]) {
      return;
    }

    // if video not attached AND
    // start fragment already requested OR start frag prefetch not enabled
    // exit loop
    // => if media not attached but start frag prefetch is enabled and start frag not requested yet, we will not exit loop
    if (!media && (this.startFragRequested || !config.startFragPrefetch)) {
      return;
    }
    var levelInfo = levels[trackId];
    var trackDetails = levelInfo.details;
    if (!trackDetails || trackDetails.live && this.levelLastLoaded !== trackId || this.waitForCdnTuneIn(trackDetails)) {
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_TRACK;
      return;
    }
    var bufferable = this.mediaBuffer ? this.mediaBuffer : this.media;
    if (this.bufferFlushed && bufferable) {
      this.bufferFlushed = false;
      this.afterBufferFlushed(bufferable, _loader_fragment__WEBPACK_IMPORTED_MODULE_7__.ElementaryStreamTypes.AUDIO, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.AUDIO);
    }
    var bufferInfo = this.getFwdBufferInfo(bufferable, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.AUDIO);
    if (bufferInfo === null) {
      return;
    }
    var audioSwitch = this.audioSwitch;
    if (!audioSwitch && this._streamEnded(bufferInfo, trackDetails)) {
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.BUFFER_EOS, {
        type: 'audio'
      });
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.ENDED;
      return;
    }
    var mainBufferInfo = this.getFwdBufferInfo(this.videoBuffer ? this.videoBuffer : this.media, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN);
    var bufferLen = bufferInfo.len;
    var maxBufLen = this.getMaxBufferLength(mainBufferInfo === null || mainBufferInfo === void 0 ? void 0 : mainBufferInfo.len);

    // if buffer length is less than maxBufLen try to load a new fragment
    if (bufferLen >= maxBufLen && !audioSwitch) {
      return;
    }
    var fragments = trackDetails.fragments;
    var start = fragments[0].start;
    var targetBufferTime = bufferInfo.end;
    if (audioSwitch && media) {
      var pos = this.getLoadPosition();
      targetBufferTime = pos;
      // if currentTime (pos) is less than alt audio playlist start time, it means that alt audio is ahead of currentTime
      if (trackDetails.PTSKnown && pos < start) {
        // if everything is buffered from pos to start or if audio buffer upfront, let's seek to start
        if (bufferInfo.end > start || bufferInfo.nextStart) {
          this.log('Alt audio track ahead of main track, seek to start of alt audio track');
          media.currentTime = start + 0.05;
        }
      }
    }

    // buffer audio up to one target duration ahead of main buffer
    if (mainBufferInfo && targetBufferTime > mainBufferInfo.end + trackDetails.targetduration) {
      return;
    }
    // wait for main buffer after buffing some audio
    if ((!mainBufferInfo || !mainBufferInfo.len) && bufferInfo.len) {
      return;
    }
    var frag = this.getNextFragment(targetBufferTime, trackDetails);
    if (!frag) {
      this.bufferFlushed = true;
      return;
    }
    this.loadFragment(frag, trackDetails, targetBufferTime);
  };
  _proto.getMaxBufferLength = function getMaxBufferLength(mainBufferLength) {
    var maxConfigBuffer = _BaseStreamController.prototype.getMaxBufferLength.call(this);
    if (!mainBufferLength) {
      return maxConfigBuffer;
    }
    return Math.max(maxConfigBuffer, mainBufferLength);
  };
  _proto.onMediaDetaching = function onMediaDetaching() {
    this.videoBuffer = null;
    _BaseStreamController.prototype.onMediaDetaching.call(this);
  };
  _proto.onAudioTracksUpdated = function onAudioTracksUpdated(event, _ref2) {
    var audioTracks = _ref2.audioTracks;
    this.resetTransmuxer();
    this.levels = audioTracks.map(function (mediaPlaylist) {
      return new _types_level__WEBPACK_IMPORTED_MODULE_5__.Level(mediaPlaylist);
    });
  };
  _proto.onAudioTrackSwitching = function onAudioTrackSwitching(event, data) {
    // if any URL found on new audio track, it is an alternate audio track
    var altAudio = !!data.url;
    this.trackId = data.id;
    var fragCurrent = this.fragCurrent;
    if (fragCurrent) {
      fragCurrent.abortRequests();
    }
    this.fragCurrent = null;
    this.clearWaitingFragment();
    // destroy useless transmuxer when switching audio to main
    if (!altAudio) {
      this.resetTransmuxer();
    } else {
      // switching to audio track, start timer if not already started
      this.setInterval(TICK_INTERVAL);
    }

    // should we switch tracks ?
    if (altAudio) {
      this.audioSwitch = true;
      // main audio track are handled by stream-controller, just do something if switching to alt audio track
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
    } else {
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.STOPPED;
    }
    this.tick();
  };
  _proto.onManifestLoading = function onManifestLoading() {
    this.mainDetails = null;
    this.fragmentTracker.removeAllFragments();
    this.startPosition = this.lastCurrentTime = 0;
    this.bufferFlushed = false;
  };
  _proto.onLevelLoaded = function onLevelLoaded(event, data) {
    this.mainDetails = data.details;
    if (this.cachedTrackLoadedData !== null) {
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.AUDIO_TRACK_LOADED, this.cachedTrackLoadedData);
      this.cachedTrackLoadedData = null;
    }
  };
  _proto.onAudioTrackLoaded = function onAudioTrackLoaded(event, data) {
    var _track$details;
    if (this.mainDetails == null) {
      this.cachedTrackLoadedData = data;
      return;
    }
    var levels = this.levels;
    var newDetails = data.details,
      trackId = data.id;
    if (!levels) {
      this.warn("Audio tracks were reset while loading level " + trackId);
      return;
    }
    this.log("Track " + trackId + " loaded [" + newDetails.startSN + "," + newDetails.endSN + "],duration:" + newDetails.totalduration);
    var track = levels[trackId];
    var sliding = 0;
    if (newDetails.live || (_track$details = track.details) !== null && _track$details !== void 0 && _track$details.live) {
      var mainDetails = this.mainDetails;
      if (!newDetails.fragments[0]) {
        newDetails.deltaUpdateFailed = true;
      }
      if (newDetails.deltaUpdateFailed || !mainDetails) {
        return;
      }
      if (!track.details && newDetails.hasProgramDateTime && mainDetails.hasProgramDateTime) {
        // Make sure our audio rendition is aligned with the "main" rendition, using
        // pdt as our reference times.
        (0,_utils_discontinuities__WEBPACK_IMPORTED_MODULE_12__.alignMediaPlaylistByPDT)(newDetails, mainDetails);
        sliding = newDetails.fragments[0].start;
      } else {
        sliding = this.alignPlaylists(newDetails, track.details);
      }
    }
    track.details = newDetails;
    this.levelLastLoaded = trackId;

    // compute start position if we are aligned with the main playlist
    if (!this.startFragRequested && (this.mainDetails || !newDetails.live)) {
      this.setStartPosition(track.details, sliding);
    }
    // only switch back to IDLE state if we were waiting for track to start downloading a new fragment
    if (this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_TRACK && !this.waitForCdnTuneIn(newDetails)) {
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
    }

    // trigger handler right now
    this.tick();
  };
  _proto._handleFragmentLoadProgress = function _handleFragmentLoadProgress(data) {
    var _frag$initSegment;
    var frag = data.frag,
      part = data.part,
      payload = data.payload;
    var config = this.config,
      trackId = this.trackId,
      levels = this.levels;
    if (!levels) {
      this.warn("Audio tracks were reset while fragment load was in progress. Fragment " + frag.sn + " of level " + frag.level + " will not be buffered");
      return;
    }
    var track = levels[trackId];
    console.assert(track, 'Audio track is defined on fragment load progress');
    var details = track.details;
    console.assert(details, 'Audio track details are defined on fragment load progress');
    var audioCodec = config.defaultAudioCodec || track.audioCodec || 'mp4a.40.2';
    var transmuxer = this.transmuxer;
    if (!transmuxer) {
      transmuxer = this.transmuxer = new _demux_transmuxer_interface__WEBPACK_IMPORTED_MODULE_9__["default"](this.hls, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.AUDIO, this._handleTransmuxComplete.bind(this), this._handleTransmuxerFlush.bind(this));
    }

    // Check if we have video initPTS
    // If not we need to wait for it
    var initPTS = this.initPTS[frag.cc];
    var initSegmentData = (_frag$initSegment = frag.initSegment) === null || _frag$initSegment === void 0 ? void 0 : _frag$initSegment.data;
    if (initPTS !== undefined) {
      // this.log(`Transmuxing ${sn} of [${details.startSN} ,${details.endSN}],track ${trackId}`);
      // time Offset is accurate if level PTS is known, or if playlist is not sliding (not live)
      var accurateTimeOffset = false; // details.PTSKnown || !details.live;
      var partIndex = part ? part.index : -1;
      var partial = partIndex !== -1;
      var chunkMeta = new _types_transmuxer__WEBPACK_IMPORTED_MODULE_10__.ChunkMetadata(frag.level, frag.sn, frag.stats.chunkCount, payload.byteLength, partIndex, partial);
      transmuxer.push(payload, initSegmentData, audioCodec, '', frag, part, details.totalduration, accurateTimeOffset, chunkMeta, initPTS);
    } else {
      this.log("Unknown video PTS for cc " + frag.cc + ", waiting for video PTS before demuxing audio frag " + frag.sn + " of [" + details.startSN + " ," + details.endSN + "],track " + trackId);
      var _this$waitingData = this.waitingData = this.waitingData || {
          frag: frag,
          part: part,
          cache: new _demux_chunk_cache__WEBPACK_IMPORTED_MODULE_8__["default"](),
          complete: false
        },
        cache = _this$waitingData.cache;
      cache.push(new Uint8Array(payload));
      this.waitingVideoCC = this.videoTrackCC;
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_INIT_PTS;
    }
  };
  _proto._handleFragmentLoadComplete = function _handleFragmentLoadComplete(fragLoadedData) {
    if (this.waitingData) {
      this.waitingData.complete = true;
      return;
    }
    _BaseStreamController.prototype._handleFragmentLoadComplete.call(this, fragLoadedData);
  };
  _proto.onBufferReset = function onBufferReset( /* event: Events.BUFFER_RESET */
  ) {
    // reset reference to sourcebuffers
    this.mediaBuffer = this.videoBuffer = null;
    this.loadedmetadata = false;
  };
  _proto.onBufferCreated = function onBufferCreated(event, data) {
    var audioTrack = data.tracks.audio;
    if (audioTrack) {
      this.mediaBuffer = audioTrack.buffer || null;
    }
    if (data.tracks.video) {
      this.videoBuffer = data.tracks.video.buffer || null;
    }
  };
  _proto.onFragBuffered = function onFragBuffered(event, data) {
    var frag = data.frag,
      part = data.part;
    if (frag.type !== _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.AUDIO) {
      if (!this.loadedmetadata && frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN) {
        var _ref3;
        if ((_ref3 = this.videoBuffer || this.media) !== null && _ref3 !== void 0 && _ref3.buffered.length) {
          this.loadedmetadata = true;
        }
      }
      return;
    }
    if (this.fragContextChanged(frag)) {
      // If a level switch was requested while a fragment was buffering, it will emit the FRAG_BUFFERED event upon completion
      // Avoid setting state back to IDLE or concluding the audio switch; otherwise, the switched-to track will not buffer
      this.warn("Fragment " + frag.sn + (part ? ' p: ' + part.index : '') + " of level " + frag.level + " finished buffering, but was aborted. state: " + this.state + ", audioSwitch: " + this.audioSwitch);
      return;
    }
    if (frag.sn !== 'initSegment') {
      this.fragPrevious = frag;
      if (this.audioSwitch) {
        this.audioSwitch = false;
        this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.AUDIO_TRACK_SWITCHED, {
          id: this.trackId
        });
      }
    }
    this.fragBufferedComplete(frag, part);
  };
  _proto.onError = function onError(event, data) {
    if (data.type === _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorTypes.KEY_SYSTEM_ERROR) {
      this.onFragmentOrKeyLoadError(_types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.AUDIO, data);
      return;
    }
    switch (data.details) {
      case _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorDetails.FRAG_LOAD_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorDetails.FRAG_LOAD_TIMEOUT:
      case _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorDetails.FRAG_PARSING_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorDetails.KEY_LOAD_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorDetails.KEY_LOAD_TIMEOUT:
        // TODO: Skip fragments that do not belong to this.fragCurrent audio-group id
        this.onFragmentOrKeyLoadError(_types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.AUDIO, data);
        break;
      case _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorDetails.AUDIO_TRACK_LOAD_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorDetails.AUDIO_TRACK_LOAD_TIMEOUT:
        //  when in ERROR state, don't switch back to IDLE state in case a non-fatal error is received
        if (this.state !== _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.ERROR && this.state !== _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.STOPPED) {
          // if fatal error, stop processing, otherwise move to IDLE to retry loading
          this.state = data.fatal ? _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.ERROR : _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
          this.warn(data.details + " while loading frag, switching to " + this.state + " state");
        }
        break;
      case _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorDetails.BUFFER_FULL_ERROR:
        // if in appending state
        if (data.parent === 'audio' && (this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.PARSING || this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.PARSED)) {
          var flushBuffer = true;
          var bufferedInfo = this.getFwdBufferInfo(this.mediaBuffer, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.AUDIO);
          // 0.5 : tolerance needed as some browsers stalls playback before reaching buffered end
          // reduce max buf len if current position is buffered
          if (bufferedInfo && bufferedInfo.len > 0.5) {
            flushBuffer = !this.reduceMaxBufferLength(bufferedInfo.len);
          }
          if (flushBuffer) {
            // current position is not buffered, but browser is still complaining about buffer full error
            // this happens on IE/Edge, refer to https://github.com/video-dev/hls.js/pull/708
            // in that case flush the whole audio buffer to recover
            this.warn('Buffer full error also media.currentTime is not buffered, flush audio buffer');
            this.fragCurrent = null;
            _BaseStreamController.prototype.flushMainBuffer.call(this, 0, Number.POSITIVE_INFINITY, 'audio');
          }
          this.resetLoadingState();
        }
        break;
      default:
        break;
    }
  };
  _proto.onBufferFlushed = function onBufferFlushed(event, _ref4) {
    var type = _ref4.type;
    if (type === _loader_fragment__WEBPACK_IMPORTED_MODULE_7__.ElementaryStreamTypes.AUDIO) {
      this.bufferFlushed = true;
      if (this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.ENDED) {
        this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
      }
    }
  };
  _proto._handleTransmuxComplete = function _handleTransmuxComplete(transmuxResult) {
    var _id3$samples;
    var id = 'audio';
    var hls = this.hls;
    var remuxResult = transmuxResult.remuxResult,
      chunkMeta = transmuxResult.chunkMeta;
    var context = this.getCurrentContext(chunkMeta);
    if (!context) {
      this.warn("The loading context changed while buffering fragment " + chunkMeta.sn + " of level " + chunkMeta.level + ". This chunk will not be buffered.");
      this.resetStartWhenNotLoaded(chunkMeta.level);
      return;
    }
    var frag = context.frag,
      part = context.part,
      details = context.level.details;
    var audio = remuxResult.audio,
      text = remuxResult.text,
      id3 = remuxResult.id3,
      initSegment = remuxResult.initSegment;

    // Check if the current fragment has been aborted. We check this by first seeing if we're still playing the current level.
    // If we are, subsequently check if the currently loading fragment (fragCurrent) has changed.
    if (this.fragContextChanged(frag) || !details) {
      return;
    }
    this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.PARSING;
    if (this.audioSwitch && audio) {
      this.completeAudioSwitch();
    }
    if (initSegment !== null && initSegment !== void 0 && initSegment.tracks) {
      this._bufferInitSegment(initSegment.tracks, frag, chunkMeta);
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_PARSING_INIT_SEGMENT, {
        frag: frag,
        id: id,
        tracks: initSegment.tracks
      });
      // Only flush audio from old audio tracks when PTS is known on new audio track
    }

    if (audio) {
      var startPTS = audio.startPTS,
        endPTS = audio.endPTS,
        startDTS = audio.startDTS,
        endDTS = audio.endDTS;
      if (part) {
        part.elementaryStreams[_loader_fragment__WEBPACK_IMPORTED_MODULE_7__.ElementaryStreamTypes.AUDIO] = {
          startPTS: startPTS,
          endPTS: endPTS,
          startDTS: startDTS,
          endDTS: endDTS
        };
      }
      frag.setElementaryStreamInfo(_loader_fragment__WEBPACK_IMPORTED_MODULE_7__.ElementaryStreamTypes.AUDIO, startPTS, endPTS, startDTS, endDTS);
      this.bufferFragmentData(audio, frag, part, chunkMeta);
    }
    if (id3 !== null && id3 !== void 0 && (_id3$samples = id3.samples) !== null && _id3$samples !== void 0 && _id3$samples.length) {
      var emittedID3 = _extends({
        id: id,
        frag: frag,
        details: details
      }, id3);
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_PARSING_METADATA, emittedID3);
    }
    if (text) {
      var emittedText = _extends({
        id: id,
        frag: frag,
        details: details
      }, text);
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.FRAG_PARSING_USERDATA, emittedText);
    }
  };
  _proto._bufferInitSegment = function _bufferInitSegment(tracks, frag, chunkMeta) {
    if (this.state !== _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.PARSING) {
      return;
    }
    // delete any video track found on audio transmuxer
    if (tracks.video) {
      delete tracks.video;
    }

    // include levelCodec in audio and video tracks
    var track = tracks.audio;
    if (!track) {
      return;
    }
    track.levelCodec = track.codec;
    track.id = 'audio';
    this.log("Init audio buffer, container:" + track.container + ", codecs[parsed]=[" + track.codec + "]");
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.BUFFER_CODECS, tracks);
    var initSegment = track.initSegment;
    if (initSegment !== null && initSegment !== void 0 && initSegment.byteLength) {
      var segment = {
        type: 'audio',
        frag: frag,
        part: null,
        chunkMeta: chunkMeta,
        parent: frag.type,
        data: initSegment
      };
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.BUFFER_APPENDING, segment);
    }
    // trigger handler right now
    this.tick();
  };
  _proto.loadFragment = function loadFragment(frag, trackDetails, targetBufferTime) {
    // only load if fragment is not loaded or if in audio switch
    var fragState = this.fragmentTracker.getState(frag);
    this.fragCurrent = frag;

    // we force a frag loading in audio switch as fragment tracker might not have evicted previous frags in case of quick audio switch
    if (this.audioSwitch || fragState === _fragment_tracker__WEBPACK_IMPORTED_MODULE_4__.FragmentState.NOT_LOADED || fragState === _fragment_tracker__WEBPACK_IMPORTED_MODULE_4__.FragmentState.PARTIAL) {
      if (frag.sn === 'initSegment') {
        this._loadInitSegment(frag, trackDetails);
      } else if (trackDetails.live && !(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(this.initPTS[frag.cc])) {
        this.log("Waiting for video PTS in continuity counter " + frag.cc + " of live stream before loading audio fragment " + frag.sn + " of level " + this.trackId);
        this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_INIT_PTS;
      } else {
        this.startFragRequested = true;
        _BaseStreamController.prototype.loadFragment.call(this, frag, trackDetails, targetBufferTime);
      }
    }
  };
  _proto.completeAudioSwitch = function completeAudioSwitch() {
    var hls = this.hls,
      media = this.media,
      trackId = this.trackId;
    if (media) {
      this.log('Switching audio track : flushing all audio');
      _BaseStreamController.prototype.flushMainBuffer.call(this, 0, Number.POSITIVE_INFINITY, 'audio');
    }
    this.audioSwitch = false;
    hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.AUDIO_TRACK_SWITCHED, {
      id: trackId
    });
  };
  return AudioStreamController;
}(_base_stream_controller__WEBPACK_IMPORTED_MODULE_1__["default"]);
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (AudioStreamController);

/***/ }),

/***/ "./src/controller/audio-track-controller.ts":
/*!**************************************************!*\
  !*** ./src/controller/audio-track-controller.ts ***!
  \**************************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _base_playlist_controller__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./base-playlist-controller */ "./src/controller/base-playlist-controller.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }




var AudioTrackController = /*#__PURE__*/function (_BasePlaylistControll) {
  _inheritsLoose(AudioTrackController, _BasePlaylistControll);
  function AudioTrackController(hls) {
    var _this;
    _this = _BasePlaylistControll.call(this, hls, '[audio-track-controller]') || this;
    _this.tracks = [];
    _this.groupId = null;
    _this.tracksInGroup = [];
    _this.trackId = -1;
    _this.trackName = '';
    _this.selectDefaultTrack = true;
    _this.registerListeners();
    return _this;
  }
  var _proto = AudioTrackController.prototype;
  _proto.registerListeners = function registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_PARSED, this.onManifestParsed, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.LEVEL_LOADING, this.onLevelLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.LEVEL_SWITCHING, this.onLevelSwitching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.AUDIO_TRACK_LOADED, this.onAudioTrackLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.ERROR, this.onError, this);
  };
  _proto.unregisterListeners = function unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_PARSED, this.onManifestParsed, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.LEVEL_LOADING, this.onLevelLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.LEVEL_SWITCHING, this.onLevelSwitching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.AUDIO_TRACK_LOADED, this.onAudioTrackLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.ERROR, this.onError, this);
  };
  _proto.destroy = function destroy() {
    this.unregisterListeners();
    this.tracks.length = 0;
    this.tracksInGroup.length = 0;
    _BasePlaylistControll.prototype.destroy.call(this);
  };
  _proto.onManifestLoading = function onManifestLoading() {
    this.tracks = [];
    this.groupId = null;
    this.tracksInGroup = [];
    this.trackId = -1;
    this.trackName = '';
    this.selectDefaultTrack = true;
  };
  _proto.onManifestParsed = function onManifestParsed(event, data) {
    this.tracks = data.audioTracks || [];
  };
  _proto.onAudioTrackLoaded = function onAudioTrackLoaded(event, data) {
    var id = data.id,
      details = data.details;
    var currentTrack = this.tracksInGroup[id];
    if (!currentTrack) {
      this.warn("Invalid audio track id " + id);
      return;
    }
    var curDetails = currentTrack.details;
    currentTrack.details = data.details;
    this.log("audioTrack " + id + " loaded [" + details.startSN + "-" + details.endSN + "]");
    if (id === this.trackId) {
      this.retryCount = 0;
      this.playlistLoaded(id, data, curDetails);
    }
  };
  _proto.onLevelLoading = function onLevelLoading(event, data) {
    this.switchLevel(data.level);
  };
  _proto.onLevelSwitching = function onLevelSwitching(event, data) {
    this.switchLevel(data.level);
  };
  _proto.switchLevel = function switchLevel(levelIndex) {
    var levelInfo = this.hls.levels[levelIndex];
    if (!(levelInfo !== null && levelInfo !== void 0 && levelInfo.audioGroupIds)) {
      return;
    }
    var audioGroupId = levelInfo.audioGroupIds[levelInfo.urlId];
    if (this.groupId !== audioGroupId) {
      this.groupId = audioGroupId;
      var audioTracks = this.tracks.filter(function (track) {
        return !audioGroupId || track.groupId === audioGroupId;
      });

      // Disable selectDefaultTrack if there are no default tracks
      if (this.selectDefaultTrack && !audioTracks.some(function (track) {
        return track.default;
      })) {
        this.selectDefaultTrack = false;
      }
      this.tracksInGroup = audioTracks;
      var audioTracksUpdated = {
        audioTracks: audioTracks
      };
      this.log("Updating audio tracks, " + audioTracks.length + " track(s) found in \"" + audioGroupId + "\" group-id");
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.AUDIO_TRACKS_UPDATED, audioTracksUpdated);
      this.selectInitialTrack();
    }
  };
  _proto.onError = function onError(event, data) {
    _BasePlaylistControll.prototype.onError.call(this, event, data);
    if (data.fatal || !data.context) {
      return;
    }
    if (data.context.type === _types_loader__WEBPACK_IMPORTED_MODULE_3__.PlaylistContextType.AUDIO_TRACK && data.context.id === this.trackId && data.context.groupId === this.groupId) {
      this.retryLoadingOrFail(data);
    }
  };
  _proto.setAudioTrack = function setAudioTrack(newId) {
    var tracks = this.tracksInGroup;

    // check if level idx is valid
    if (newId < 0 || newId >= tracks.length) {
      this.warn('Invalid id passed to audio-track controller');
      return;
    }

    // stopping live reloading timer if any
    this.clearTimer();
    var lastTrack = tracks[this.trackId];
    this.log("Now switching to audio-track index " + newId);
    var track = tracks[newId];
    var id = track.id,
      _track$groupId = track.groupId,
      groupId = _track$groupId === void 0 ? '' : _track$groupId,
      name = track.name,
      type = track.type,
      url = track.url;
    this.trackId = newId;
    this.trackName = name;
    this.selectDefaultTrack = false;
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.AUDIO_TRACK_SWITCHING, {
      id: id,
      groupId: groupId,
      name: name,
      type: type,
      url: url
    });
    // Do not reload track unless live
    if (track.details && !track.details.live) {
      return;
    }
    var hlsUrlParameters = this.switchParams(track.url, lastTrack === null || lastTrack === void 0 ? void 0 : lastTrack.details);
    this.loadPlaylist(hlsUrlParameters);
  };
  _proto.selectInitialTrack = function selectInitialTrack() {
    var audioTracks = this.tracksInGroup;
    console.assert(audioTracks.length, 'Initial audio track should be selected when tracks are known');
    var currentAudioTrackName = this.trackName;
    var trackId = this.findTrackId(currentAudioTrackName) || this.findTrackId();
    if (trackId !== -1) {
      this.setAudioTrack(trackId);
    } else {
      this.warn("No track found for running audio group-ID: " + this.groupId);
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.MEDIA_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.AUDIO_TRACK_LOAD_ERROR,
        fatal: true
      });
    }
  };
  _proto.findTrackId = function findTrackId(name) {
    var audioTracks = this.tracksInGroup;
    for (var i = 0; i < audioTracks.length; i++) {
      var track = audioTracks[i];
      if (!this.selectDefaultTrack || track.default) {
        if (!name || name === track.name) {
          return track.id;
        }
      }
    }
    return -1;
  };
  _proto.loadPlaylist = function loadPlaylist(hlsUrlParameters) {
    _BasePlaylistControll.prototype.loadPlaylist.call(this);
    var audioTrack = this.tracksInGroup[this.trackId];
    if (this.shouldLoadTrack(audioTrack)) {
      var id = audioTrack.id;
      var groupId = audioTrack.groupId;
      var url = audioTrack.url;
      if (hlsUrlParameters) {
        try {
          url = hlsUrlParameters.addDirectives(url);
        } catch (error) {
          this.warn("Could not construct new URL with HLS Delivery Directives: " + error);
        }
      }
      // track not retrieved yet, or live playlist we need to (re)load it
      this.log("loading audio-track playlist for id: " + id);
      this.clearTimer();
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.AUDIO_TRACK_LOADING, {
        url: url,
        id: id,
        groupId: groupId,
        deliveryDirectives: hlsUrlParameters || null
      });
    }
  };
  _createClass(AudioTrackController, [{
    key: "audioTracks",
    get: function get() {
      return this.tracksInGroup;
    }
  }, {
    key: "audioTrack",
    get: function get() {
      return this.trackId;
    },
    set: function set(newId) {
      // If audio track is selected from API then don't choose from the manifest default track
      this.selectDefaultTrack = false;
      this.setAudioTrack(newId);
    }
  }]);
  return AudioTrackController;
}(_base_playlist_controller__WEBPACK_IMPORTED_MODULE_2__["default"]);
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (AudioTrackController);

/***/ }),

/***/ "./src/controller/base-playlist-controller.ts":
/*!****************************************************!*\
  !*** ./src/controller/base-playlist-controller.ts ***!
  \****************************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ BasePlaylistController)
/* harmony export */ });
/* harmony import */ var _types_level__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../types/level */ "./src/types/level.ts");
/* harmony import */ var _level_helper__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./level-helper */ "./src/controller/level-helper.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");




var BasePlaylistController = /*#__PURE__*/function () {
  function BasePlaylistController(hls, logPrefix) {
    this.hls = void 0;
    this.timer = -1;
    this.requestScheduled = -1;
    this.canLoad = false;
    this.retryCount = 0;
    this.log = void 0;
    this.warn = void 0;
    this.log = _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log.bind(_utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger, logPrefix + ":");
    this.warn = _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn.bind(_utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger, logPrefix + ":");
    this.hls = hls;
  }
  var _proto = BasePlaylistController.prototype;
  _proto.destroy = function destroy() {
    this.clearTimer();
    // @ts-ignore
    this.hls = this.log = this.warn = null;
  };
  _proto.onError = function onError(event, data) {
    if (data.fatal && (data.type === _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorTypes.NETWORK_ERROR || data.type === _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorTypes.KEY_SYSTEM_ERROR)) {
      this.stopLoad();
    }
  };
  _proto.clearTimer = function clearTimer() {
    clearTimeout(this.timer);
    this.timer = -1;
  };
  _proto.startLoad = function startLoad() {
    this.canLoad = true;
    this.retryCount = 0;
    this.requestScheduled = -1;
    this.loadPlaylist();
  };
  _proto.stopLoad = function stopLoad() {
    this.canLoad = false;
    this.clearTimer();
  };
  _proto.switchParams = function switchParams(playlistUri, previous) {
    var renditionReports = previous === null || previous === void 0 ? void 0 : previous.renditionReports;
    if (renditionReports) {
      for (var i = 0; i < renditionReports.length; i++) {
        var attr = renditionReports[i];
        var uri = void 0;
        try {
          uri = new self.URL(attr.URI, previous.url).href;
        } catch (error) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn("Could not construct new URL for Rendition Report: " + error);
          uri = attr.URI || '';
        }
        if (uri === playlistUri.slice(-uri.length)) {
          var msn = parseInt(attr['LAST-MSN']) || (previous === null || previous === void 0 ? void 0 : previous.lastPartSn);
          var part = parseInt(attr['LAST-PART']) || (previous === null || previous === void 0 ? void 0 : previous.lastPartIndex);
          if (this.hls.config.lowLatencyMode) {
            var currentGoal = Math.min(previous.age - previous.partTarget, previous.targetduration);
            if (part >= 0 && currentGoal > previous.partTarget) {
              part += 1;
            }
          }
          return new _types_level__WEBPACK_IMPORTED_MODULE_0__.HlsUrlParameters(msn, part >= 0 ? part : undefined, _types_level__WEBPACK_IMPORTED_MODULE_0__.HlsSkip.No);
        }
      }
    }
  };
  _proto.loadPlaylist = function loadPlaylist(hlsUrlParameters) {
    if (this.requestScheduled === -1) {
      this.requestScheduled = self.performance.now();
    }
  };
  _proto.shouldLoadTrack = function shouldLoadTrack(track) {
    return this.canLoad && track && !!track.url && (!track.details || track.details.live);
  };
  _proto.playlistLoaded = function playlistLoaded(index, data, previousDetails) {
    var _this = this;
    var details = data.details,
      stats = data.stats;

    // Set last updated date-time
    var now = self.performance.now();
    var elapsed = stats.loading.first ? Math.max(0, now - stats.loading.first) : 0;
    details.advancedDateTime = Date.now() - elapsed;

    // if current playlist is a live playlist, arm a timer to reload it
    if (details.live || previousDetails !== null && previousDetails !== void 0 && previousDetails.live) {
      details.reloaded(previousDetails);
      if (previousDetails) {
        this.log("live playlist " + index + " " + (details.advanced ? 'REFRESHED ' + details.lastPartSn + '-' + details.lastPartIndex : 'MISSED'));
      }
      // Merge live playlists to adjust fragment starts and fill in delta playlist skipped segments
      if (previousDetails && details.fragments.length > 0) {
        (0,_level_helper__WEBPACK_IMPORTED_MODULE_1__.mergeDetails)(previousDetails, details);
      }
      if (!this.canLoad || !details.live) {
        return;
      }
      var deliveryDirectives;
      var msn = undefined;
      var part = undefined;
      if (details.canBlockReload && details.endSN && details.advanced) {
        // Load level with LL-HLS delivery directives
        var lowLatencyMode = this.hls.config.lowLatencyMode;
        var lastPartSn = details.lastPartSn;
        var endSn = details.endSN;
        var lastPartIndex = details.lastPartIndex;
        var hasParts = lastPartIndex !== -1;
        var lastPart = lastPartSn === endSn;
        // When low latency mode is disabled, we'll skip part requests once the last part index is found
        var nextSnStartIndex = lowLatencyMode ? 0 : lastPartIndex;
        if (hasParts) {
          msn = lastPart ? endSn + 1 : lastPartSn;
          part = lastPart ? nextSnStartIndex : lastPartIndex + 1;
        } else {
          msn = endSn + 1;
        }
        // Low-Latency CDN Tune-in: "age" header and time since load indicates we're behind by more than one part
        // Update directives to obtain the Playlist that has the estimated additional duration of media
        var lastAdvanced = details.age;
        var cdnAge = lastAdvanced + details.ageHeader;
        var currentGoal = Math.min(cdnAge - details.partTarget, details.targetduration * 1.5);
        if (currentGoal > 0) {
          if (previousDetails && currentGoal > previousDetails.tuneInGoal) {
            // If we attempted to get the next or latest playlist update, but currentGoal increased,
            // then we either can't catchup, or the "age" header cannot be trusted.
            this.warn("CDN Tune-in goal increased from: " + previousDetails.tuneInGoal + " to: " + currentGoal + " with playlist age: " + details.age);
            currentGoal = 0;
          } else {
            var segments = Math.floor(currentGoal / details.targetduration);
            msn += segments;
            if (part !== undefined) {
              var parts = Math.round(currentGoal % details.targetduration / details.partTarget);
              part += parts;
            }
            this.log("CDN Tune-in age: " + details.ageHeader + "s last advanced " + lastAdvanced.toFixed(2) + "s goal: " + currentGoal + " skip sn " + segments + " to part " + part);
          }
          details.tuneInGoal = currentGoal;
        }
        deliveryDirectives = this.getDeliveryDirectives(details, data.deliveryDirectives, msn, part);
        if (lowLatencyMode || !lastPart) {
          this.loadPlaylist(deliveryDirectives);
          return;
        }
      } else {
        deliveryDirectives = this.getDeliveryDirectives(details, data.deliveryDirectives, msn, part);
      }
      var bufferInfo = this.hls.mainForwardBufferInfo;
      var position = bufferInfo ? bufferInfo.end - bufferInfo.len : 0;
      var distanceToLiveEdgeMs = (details.edge - position) * 1000;
      var reloadInterval = (0,_level_helper__WEBPACK_IMPORTED_MODULE_1__.computeReloadInterval)(details, distanceToLiveEdgeMs);
      if (!details.updated) {
        this.requestScheduled = -1;
      } else if (now > this.requestScheduled + reloadInterval) {
        this.requestScheduled = stats.loading.start;
      }
      if (msn !== undefined && details.canBlockReload) {
        this.requestScheduled = stats.loading.first + reloadInterval - (details.partTarget * 1000 || 1000);
      } else {
        this.requestScheduled = (this.requestScheduled === -1 ? now : this.requestScheduled) + reloadInterval;
      }
      var estimatedTimeUntilUpdate = this.requestScheduled - now;
      estimatedTimeUntilUpdate = Math.max(0, estimatedTimeUntilUpdate);
      this.log("reload live playlist " + index + " in " + Math.round(estimatedTimeUntilUpdate) + " ms");
      //     this.log(
      //       `live reload ${details.updated ? 'REFRESHED' : 'MISSED'}
      // reload in ${estimatedTimeUntilUpdate / 1000}
      // round trip ${(stats.loading.end - stats.loading.start) / 1000}
      // diff ${
      //   (reloadInterval -
      //     (estimatedTimeUntilUpdate + stats.loading.end - stats.loading.start)) /
      //   1000
      // }
      // reload interval ${reloadInterval / 1000}
      // target duration ${details.targetduration}
      // distance to edge ${distanceToLiveEdgeMs / 1000}`
      //     );

      this.timer = self.setTimeout(function () {
        return _this.loadPlaylist(deliveryDirectives);
      }, estimatedTimeUntilUpdate);
    } else {
      this.clearTimer();
    }
  };
  _proto.getDeliveryDirectives = function getDeliveryDirectives(details, previousDeliveryDirectives, msn, part) {
    var skip = (0,_types_level__WEBPACK_IMPORTED_MODULE_0__.getSkipValue)(details, msn);
    if (previousDeliveryDirectives !== null && previousDeliveryDirectives !== void 0 && previousDeliveryDirectives.skip && details.deltaUpdateFailed) {
      msn = previousDeliveryDirectives.msn;
      part = previousDeliveryDirectives.part;
      skip = _types_level__WEBPACK_IMPORTED_MODULE_0__.HlsSkip.No;
    }
    return new _types_level__WEBPACK_IMPORTED_MODULE_0__.HlsUrlParameters(msn, part, skip);
  };
  _proto.retryLoadingOrFail = function retryLoadingOrFail(errorEvent) {
    var _this2 = this;
    var config = this.hls.config;
    var retry = this.retryCount < config.levelLoadingMaxRetry;
    if (retry) {
      var _errorEvent$context;
      this.requestScheduled = -1;
      this.retryCount++;
      if (errorEvent.details.indexOf('LoadTimeOut') > -1 && (_errorEvent$context = errorEvent.context) !== null && _errorEvent$context !== void 0 && _errorEvent$context.deliveryDirectives) {
        // The LL-HLS request already timed out so retry immediately
        this.warn("retry playlist loading #" + this.retryCount + " after \"" + errorEvent.details + "\"");
        this.loadPlaylist();
      } else {
        // exponential backoff capped to max retry timeout
        var delay = Math.min(Math.pow(2, this.retryCount) * config.levelLoadingRetryDelay, config.levelLoadingMaxRetryTimeout);
        // Schedule level/track reload
        this.timer = self.setTimeout(function () {
          return _this2.loadPlaylist();
        }, delay);
        this.warn("retry playlist loading #" + this.retryCount + " in " + delay + " ms after \"" + errorEvent.details + "\"");
      }
    } else {
      this.warn("cannot recover from error \"" + errorEvent.details + "\"");
      // stopping live reloading timer if any
      this.clearTimer();
      // switch error to fatal
      errorEvent.fatal = true;
    }
    return retry;
  };
  return BasePlaylistController;
}();


/***/ }),

/***/ "./src/controller/base-stream-controller.ts":
/*!**************************************************!*\
  !*** ./src/controller/base-stream-controller.ts ***!
  \**************************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "State": () => (/* binding */ State),
/* harmony export */   "default": () => (/* binding */ BaseStreamController)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _task_loop__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../task-loop */ "./src/task-loop.ts");
/* harmony import */ var _fragment_tracker__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./fragment-tracker */ "./src/controller/fragment-tracker.ts");
/* harmony import */ var _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/buffer-helper */ "./src/utils/buffer-helper.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _types_transmuxer__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ../types/transmuxer */ "./src/types/transmuxer.ts");
/* harmony import */ var _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_8__ = __webpack_require__(/*! ../utils/mp4-tools */ "./src/utils/mp4-tools.ts");
/* harmony import */ var _utils_discontinuities__WEBPACK_IMPORTED_MODULE_9__ = __webpack_require__(/*! ../utils/discontinuities */ "./src/utils/discontinuities.ts");
/* harmony import */ var _fragment_finders__WEBPACK_IMPORTED_MODULE_10__ = __webpack_require__(/*! ./fragment-finders */ "./src/controller/fragment-finders.ts");
/* harmony import */ var _level_helper__WEBPACK_IMPORTED_MODULE_11__ = __webpack_require__(/*! ./level-helper */ "./src/controller/level-helper.ts");
/* harmony import */ var _loader_fragment_loader__WEBPACK_IMPORTED_MODULE_12__ = __webpack_require__(/*! ../loader/fragment-loader */ "./src/loader/fragment-loader.ts");
/* harmony import */ var _crypt_decrypter__WEBPACK_IMPORTED_MODULE_13__ = __webpack_require__(/*! ../crypt/decrypter */ "./src/crypt/decrypter.ts");
/* harmony import */ var _utils_time_ranges__WEBPACK_IMPORTED_MODULE_14__ = __webpack_require__(/*! ../utils/time-ranges */ "./src/utils/time-ranges.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_15__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");





function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }















var State = {
  STOPPED: 'STOPPED',
  IDLE: 'IDLE',
  KEY_LOADING: 'KEY_LOADING',
  FRAG_LOADING: 'FRAG_LOADING',
  FRAG_LOADING_WAITING_RETRY: 'FRAG_LOADING_WAITING_RETRY',
  WAITING_TRACK: 'WAITING_TRACK',
  PARSING: 'PARSING',
  PARSED: 'PARSED',
  ENDED: 'ENDED',
  ERROR: 'ERROR',
  WAITING_INIT_PTS: 'WAITING_INIT_PTS',
  WAITING_LEVEL: 'WAITING_LEVEL'
};
var BaseStreamController = /*#__PURE__*/function (_TaskLoop) {
  _inheritsLoose(BaseStreamController, _TaskLoop);
  function BaseStreamController(hls, fragmentTracker, keyLoader, logPrefix) {
    var _this;
    _this = _TaskLoop.call(this) || this;
    _this.hls = void 0;
    _this.fragPrevious = null;
    _this.fragCurrent = null;
    _this.fragmentTracker = void 0;
    _this.transmuxer = null;
    _this._state = State.STOPPED;
    _this.media = null;
    _this.mediaBuffer = null;
    _this.config = void 0;
    _this.bitrateTest = false;
    _this.lastCurrentTime = 0;
    _this.nextLoadPosition = 0;
    _this.startPosition = 0;
    _this.loadedmetadata = false;
    _this.fragLoadError = 0;
    _this.retryDate = 0;
    _this.levels = null;
    _this.fragmentLoader = void 0;
    _this.keyLoader = void 0;
    _this.levelLastLoaded = null;
    _this.startFragRequested = false;
    _this.decrypter = void 0;
    _this.initPTS = [];
    _this.onvseeking = null;
    _this.onvended = null;
    _this.logPrefix = '';
    _this.log = void 0;
    _this.warn = void 0;
    _this.logPrefix = logPrefix;
    _this.log = _utils_logger__WEBPACK_IMPORTED_MODULE_4__.logger.log.bind(_utils_logger__WEBPACK_IMPORTED_MODULE_4__.logger, logPrefix + ":");
    _this.warn = _utils_logger__WEBPACK_IMPORTED_MODULE_4__.logger.warn.bind(_utils_logger__WEBPACK_IMPORTED_MODULE_4__.logger, logPrefix + ":");
    _this.hls = hls;
    _this.fragmentLoader = new _loader_fragment_loader__WEBPACK_IMPORTED_MODULE_12__["default"](hls.config);
    _this.keyLoader = keyLoader;
    _this.fragmentTracker = fragmentTracker;
    _this.config = hls.config;
    _this.decrypter = new _crypt_decrypter__WEBPACK_IMPORTED_MODULE_13__["default"](hls.config);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_5__.Events.LEVEL_SWITCHING, _this.onLevelSwitching, _assertThisInitialized(_this));
    return _this;
  }
  var _proto = BaseStreamController.prototype;
  _proto.doTick = function doTick() {
    this.onTickEnd();
  };
  _proto.onTickEnd = function onTickEnd() {}

  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  ;
  _proto.startLoad = function startLoad(startPosition) {};
  _proto.stopLoad = function stopLoad() {
    this.fragmentLoader.abort();
    this.keyLoader.abort();
    var frag = this.fragCurrent;
    if (frag) {
      frag.abortRequests();
      this.fragmentTracker.removeFragment(frag);
    }
    this.resetTransmuxer();
    this.fragCurrent = null;
    this.fragPrevious = null;
    this.clearInterval();
    this.clearNextTick();
    this.state = State.STOPPED;
  };
  _proto._streamEnded = function _streamEnded(bufferInfo, levelDetails) {
    // If playlist is live, there is another buffered range after the current range, nothing buffered, media is detached,
    // of nothing loading/loaded return false
    if (levelDetails.live || bufferInfo.nextStart || !bufferInfo.end || !this.media) {
      return false;
    }
    var partList = levelDetails.partList;
    // Since the last part isn't guaranteed to correspond to the last playlist segment for Low-Latency HLS,
    // check instead if the last part is buffered.
    if (partList !== null && partList !== void 0 && partList.length) {
      var lastPart = partList[partList.length - 1];

      // Checking the midpoint of the part for potential margin of error and related issues.
      // NOTE: Technically I believe parts could yield content that is < the computed duration (including potential a duration of 0)
      // and still be spec-compliant, so there may still be edge cases here. Likewise, there could be issues in end of stream
      // part mismatches for independent audio and video playlists/segments.
      var lastPartBuffered = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_3__.BufferHelper.isBuffered(this.media, lastPart.start + lastPart.duration / 2);
      return lastPartBuffered;
    }
    var playlistType = levelDetails.fragments[levelDetails.fragments.length - 1].type;
    return this.fragmentTracker.isEndListAppended(playlistType);
  };
  _proto.getLevelDetails = function getLevelDetails() {
    if (this.levels && this.levelLastLoaded !== null) {
      var _this$levels$this$lev;
      return (_this$levels$this$lev = this.levels[this.levelLastLoaded]) === null || _this$levels$this$lev === void 0 ? void 0 : _this$levels$this$lev.details;
    }
  };
  _proto.onMediaAttached = function onMediaAttached(event, data) {
    var media = this.media = this.mediaBuffer = data.media;
    this.onvseeking = this.onMediaSeeking.bind(this);
    this.onvended = this.onMediaEnded.bind(this);
    media.addEventListener('seeking', this.onvseeking);
    media.addEventListener('ended', this.onvended);
    var config = this.config;
    if (this.levels && config.autoStartLoad && this.state === State.STOPPED) {
      this.startLoad(config.startPosition);
    }
  };
  _proto.onMediaDetaching = function onMediaDetaching() {
    var media = this.media;
    if (media !== null && media !== void 0 && media.ended) {
      this.log('MSE detaching and video ended, reset startPosition');
      this.startPosition = this.lastCurrentTime = 0;
    }

    // remove video listeners
    if (media && this.onvseeking && this.onvended) {
      media.removeEventListener('seeking', this.onvseeking);
      media.removeEventListener('ended', this.onvended);
      this.onvseeking = this.onvended = null;
    }
    if (this.keyLoader) {
      this.keyLoader.detach();
    }
    this.media = this.mediaBuffer = null;
    this.loadedmetadata = false;
    this.fragmentTracker.removeAllFragments();
    this.stopLoad();
  };
  _proto.onMediaSeeking = function onMediaSeeking() {
    var config = this.config,
      fragCurrent = this.fragCurrent,
      media = this.media,
      mediaBuffer = this.mediaBuffer,
      state = this.state;
    var currentTime = media ? media.currentTime : 0;
    var bufferInfo = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_3__.BufferHelper.bufferInfo(mediaBuffer ? mediaBuffer : media, currentTime, config.maxBufferHole);
    this.log("media seeking to " + ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(currentTime) ? currentTime.toFixed(3) : currentTime) + ", state: " + state);
    if (this.state === State.ENDED) {
      this.resetLoadingState();
    } else if (fragCurrent) {
      // Seeking while frag load is in progress
      var tolerance = config.maxFragLookUpTolerance;
      var fragStartOffset = fragCurrent.start - tolerance;
      var fragEndOffset = fragCurrent.start + fragCurrent.duration + tolerance;
      // if seeking out of buffered range or into new one
      if (!bufferInfo.len || fragEndOffset < bufferInfo.start || fragStartOffset > bufferInfo.end) {
        var pastFragment = currentTime > fragEndOffset;
        // if the seek position is outside the current fragment range
        if (currentTime < fragStartOffset || pastFragment) {
          if (pastFragment && fragCurrent.loader) {
            this.log('seeking outside of buffer while fragment load in progress, cancel fragment load');
            fragCurrent.abortRequests();
          }
          this.resetLoadingState();
        }
      }
    }
    if (media) {
      this.lastCurrentTime = currentTime;
    }

    // in case seeking occurs although no media buffered, adjust startPosition and nextLoadPosition to seek target
    if (!this.loadedmetadata && !bufferInfo.len) {
      this.nextLoadPosition = this.startPosition = currentTime;
    }

    // Async tick to speed up processing
    this.tickImmediate();
  };
  _proto.onMediaEnded = function onMediaEnded() {
    // reset startPosition and lastCurrentTime to restart playback @ stream beginning
    this.startPosition = this.lastCurrentTime = 0;
  };
  _proto.onLevelSwitching = function onLevelSwitching(event, data) {
    this.fragLoadError = 0;
  };
  _proto.onHandlerDestroying = function onHandlerDestroying() {
    this.stopLoad();
    _TaskLoop.prototype.onHandlerDestroying.call(this);
  };
  _proto.onHandlerDestroyed = function onHandlerDestroyed() {
    this.state = State.STOPPED;
    this.hls.off(_events__WEBPACK_IMPORTED_MODULE_5__.Events.LEVEL_SWITCHING, this.onLevelSwitching, this);
    if (this.fragmentLoader) {
      this.fragmentLoader.destroy();
    }
    if (this.keyLoader) {
      this.keyLoader.destroy();
    }
    if (this.decrypter) {
      this.decrypter.destroy();
    }
    this.hls = this.log = this.warn = this.decrypter = this.keyLoader = this.fragmentLoader = this.fragmentTracker = null;
    _TaskLoop.prototype.onHandlerDestroyed.call(this);
  };
  _proto.loadFragment = function loadFragment(frag, levelDetails, targetBufferTime) {
    this._loadFragForPlayback(frag, levelDetails, targetBufferTime);
  };
  _proto._loadFragForPlayback = function _loadFragForPlayback(frag, levelDetails, targetBufferTime) {
    var _this2 = this;
    var progressCallback = function progressCallback(data) {
      if (_this2.fragContextChanged(frag)) {
        _this2.warn("Fragment " + frag.sn + (data.part ? ' p: ' + data.part.index : '') + " of level " + frag.level + " was dropped during download.");
        _this2.fragmentTracker.removeFragment(frag);
        return;
      }
      frag.stats.chunkCount++;
      _this2._handleFragmentLoadProgress(data);
    };
    this._doFragLoad(frag, levelDetails, targetBufferTime, progressCallback).then(function (data) {
      if (!data) {
        // if we're here we probably needed to backtrack or are waiting for more parts
        return;
      }
      _this2.fragLoadError = 0;
      var state = _this2.state;
      if (_this2.fragContextChanged(frag)) {
        if (state === State.FRAG_LOADING || !_this2.fragCurrent && state === State.PARSING) {
          _this2.fragmentTracker.removeFragment(frag);
          _this2.state = State.IDLE;
        }
        return;
      }
      if ('payload' in data) {
        _this2.log("Loaded fragment " + frag.sn + " of level " + frag.level);
        _this2.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.FRAG_LOADED, data);
      }

      // Pass through the whole payload; controllers not implementing progressive loading receive data from this callback
      _this2._handleFragmentLoadComplete(data);
    }).catch(function (reason) {
      if (_this2.state === State.STOPPED || _this2.state === State.ERROR) {
        return;
      }
      _this2.warn(reason);
      _this2.resetFragmentLoading(frag);
    });
  };
  _proto.flushMainBuffer = function flushMainBuffer(startOffset, endOffset, type) {
    if (type === void 0) {
      type = null;
    }
    if (!(startOffset - endOffset)) {
      return;
    }
    // When alternate audio is playing, the audio-stream-controller is responsible for the audio buffer. Otherwise,
    // passing a null type flushes both buffers
    var flushScope = {
      startOffset: startOffset,
      endOffset: endOffset,
      type: type
    };
    // Reset load errors on flush
    this.fragLoadError = 0;
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.BUFFER_FLUSHING, flushScope);
  };
  _proto._loadInitSegment = function _loadInitSegment(frag, details) {
    var _this3 = this;
    this._doFragLoad(frag, details).then(function (data) {
      if (!data || _this3.fragContextChanged(frag) || !_this3.levels) {
        throw new Error('init load aborted');
      }
      return data;
    }).then(function (data) {
      var hls = _this3.hls;
      var payload = data.payload;
      var decryptData = frag.decryptdata;

      // check to see if the payload needs to be decrypted
      if (payload && payload.byteLength > 0 && decryptData && decryptData.key && decryptData.iv && decryptData.method === 'AES-128') {
        var startTime = self.performance.now();
        // decrypt the subtitles
        return _this3.decrypter.decrypt(new Uint8Array(payload), decryptData.key.buffer, decryptData.iv.buffer).then(function (decryptedData) {
          var endTime = self.performance.now();
          hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.FRAG_DECRYPTED, {
            frag: frag,
            payload: decryptedData,
            stats: {
              tstart: startTime,
              tdecrypt: endTime
            }
          });
          data.payload = decryptedData;
          return data;
        });
      }
      return data;
    }).then(function (data) {
      var fragCurrent = _this3.fragCurrent,
        hls = _this3.hls,
        levels = _this3.levels;
      if (!levels) {
        throw new Error('init load aborted, missing levels');
      }
      var details = levels[frag.level].details;
      console.assert(details, 'Level details are defined when init segment is loaded');
      var stats = frag.stats;
      _this3.state = State.IDLE;
      _this3.fragLoadError = 0;
      frag.data = new Uint8Array(data.payload);
      stats.parsing.start = stats.buffering.start = self.performance.now();
      stats.parsing.end = stats.buffering.end = self.performance.now();

      // Silence FRAG_BUFFERED event if fragCurrent is null
      if (data.frag === fragCurrent) {
        hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.FRAG_BUFFERED, {
          stats: stats,
          frag: fragCurrent,
          part: null,
          id: frag.type
        });
      }
      _this3.tick();
    }).catch(function (reason) {
      if (_this3.state === State.STOPPED || _this3.state === State.ERROR) {
        return;
      }
      _this3.warn(reason);
      _this3.resetFragmentLoading(frag);
    });
  };
  _proto.fragContextChanged = function fragContextChanged(frag) {
    var fragCurrent = this.fragCurrent;
    return !frag || !fragCurrent || frag.level !== fragCurrent.level || frag.sn !== fragCurrent.sn || frag.urlId !== fragCurrent.urlId;
  };
  _proto.fragBufferedComplete = function fragBufferedComplete(frag, part) {
    var _frag$startPTS, _frag$endPTS, _this$fragCurrent, _this$fragPrevious;
    var media = this.mediaBuffer ? this.mediaBuffer : this.media;
    this.log("Buffered " + frag.type + " sn: " + frag.sn + (part ? ' part: ' + part.index : '') + " of " + (this.logPrefix === '[stream-controller]' ? 'level' : 'track') + " " + frag.level + " (frag:[" + ((_frag$startPTS = frag.startPTS) != null ? _frag$startPTS : NaN).toFixed(3) + "-" + ((_frag$endPTS = frag.endPTS) != null ? _frag$endPTS : NaN).toFixed(3) + "] > buffer:" + (media ? _utils_time_ranges__WEBPACK_IMPORTED_MODULE_14__["default"].toString(_utils_buffer_helper__WEBPACK_IMPORTED_MODULE_3__.BufferHelper.getBuffered(media)) : '(detached)') + ")");
    this.state = State.IDLE;
    if (!media) {
      return;
    }
    if (!this.loadedmetadata && frag.type == _types_loader__WEBPACK_IMPORTED_MODULE_15__.PlaylistLevelType.MAIN && media.buffered.length && ((_this$fragCurrent = this.fragCurrent) === null || _this$fragCurrent === void 0 ? void 0 : _this$fragCurrent.sn) === ((_this$fragPrevious = this.fragPrevious) === null || _this$fragPrevious === void 0 ? void 0 : _this$fragPrevious.sn)) {
      this.loadedmetadata = true;
      this.seekToStartPos();
    }
    this.tick();
  };
  _proto.seekToStartPos = function seekToStartPos() {};
  _proto._handleFragmentLoadComplete = function _handleFragmentLoadComplete(fragLoadedEndData) {
    var transmuxer = this.transmuxer;
    if (!transmuxer) {
      return;
    }
    var frag = fragLoadedEndData.frag,
      part = fragLoadedEndData.part,
      partsLoaded = fragLoadedEndData.partsLoaded;
    // If we did not load parts, or loaded all parts, we have complete (not partial) fragment data
    var complete = !partsLoaded || partsLoaded.length === 0 || partsLoaded.some(function (fragLoaded) {
      return !fragLoaded;
    });
    var chunkMeta = new _types_transmuxer__WEBPACK_IMPORTED_MODULE_7__.ChunkMetadata(frag.level, frag.sn, frag.stats.chunkCount + 1, 0, part ? part.index : -1, !complete);
    transmuxer.flush(chunkMeta);
  }

  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  ;
  _proto._handleFragmentLoadProgress = function _handleFragmentLoadProgress(frag) {};
  _proto._doFragLoad = function _doFragLoad(frag, details, targetBufferTime, progressCallback) {
    var _frag$decryptdata,
      _this4 = this;
    if (targetBufferTime === void 0) {
      targetBufferTime = null;
    }
    if (!this.levels) {
      throw new Error('frag load aborted, missing levels');
    }
    var keyLoadingPromise = null;
    if (frag.encrypted && !((_frag$decryptdata = frag.decryptdata) !== null && _frag$decryptdata !== void 0 && _frag$decryptdata.key)) {
      this.log("Loading key for " + frag.sn + " of [" + details.startSN + "-" + details.endSN + "], " + (this.logPrefix === '[stream-controller]' ? 'level' : 'track') + " " + frag.level);
      this.state = State.KEY_LOADING;
      this.fragCurrent = frag;
      keyLoadingPromise = this.keyLoader.load(frag).then(function (keyLoadedData) {
        if (!_this4.fragContextChanged(keyLoadedData.frag)) {
          _this4.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.KEY_LOADED, keyLoadedData);
          if (_this4.state === State.KEY_LOADING) {
            _this4.state = State.IDLE;
          }
          return keyLoadedData;
        }
      });
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.KEY_LOADING, {
        frag: frag
      });
      this.throwIfFragContextChanged('KEY_LOADING');
    } else if (!frag.encrypted && details.encryptedFragments.length) {
      this.keyLoader.loadClear(frag, details.encryptedFragments);
    }
    targetBufferTime = Math.max(frag.start, targetBufferTime || 0);
    if (this.config.lowLatencyMode && details) {
      var partList = details.partList;
      if (partList && progressCallback) {
        if (targetBufferTime > frag.end && details.fragmentHint) {
          frag = details.fragmentHint;
        }
        var partIndex = this.getNextPart(partList, frag, targetBufferTime);
        if (partIndex > -1) {
          var part = partList[partIndex];
          this.log("Loading part sn: " + frag.sn + " p: " + part.index + " cc: " + frag.cc + " of playlist [" + details.startSN + "-" + details.endSN + "] parts [0-" + partIndex + "-" + (partList.length - 1) + "] " + (this.logPrefix === '[stream-controller]' ? 'level' : 'track') + ": " + frag.level + ", target: " + parseFloat(targetBufferTime.toFixed(3)));
          this.nextLoadPosition = part.start + part.duration;
          this.state = State.FRAG_LOADING;
          this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.FRAG_LOADING, {
            frag: frag,
            part: partList[partIndex],
            targetBufferTime: targetBufferTime
          });
          this.throwIfFragContextChanged('FRAG_LOADING parts');
          if (keyLoadingPromise) {
            return keyLoadingPromise.then(function (keyLoadedData) {
              if (!keyLoadedData || _this4.fragContextChanged(keyLoadedData.frag)) {
                return null;
              }
              return _this4.doFragPartsLoad(frag, partList, partIndex, progressCallback);
            }).catch(function (error) {
              return _this4.handleFragLoadError(error);
            });
          }
          return this.doFragPartsLoad(frag, partList, partIndex, progressCallback).catch(function (error) {
            return _this4.handleFragLoadError(error);
          });
        } else if (!frag.url || this.loadedEndOfParts(partList, targetBufferTime)) {
          // Fragment hint has no parts
          return Promise.resolve(null);
        }
      }
    }
    this.log("Loading fragment " + frag.sn + " cc: " + frag.cc + " " + (details ? 'of [' + details.startSN + '-' + details.endSN + '] ' : '') + (this.logPrefix === '[stream-controller]' ? 'level' : 'track') + ": " + frag.level + ", target: " + parseFloat(targetBufferTime.toFixed(3)));
    // Don't update nextLoadPosition for fragments which are not buffered
    if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(frag.sn) && !this.bitrateTest) {
      this.nextLoadPosition = frag.start + frag.duration;
    }
    this.state = State.FRAG_LOADING;
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.FRAG_LOADING, {
      frag: frag,
      targetBufferTime: targetBufferTime
    });
    this.throwIfFragContextChanged('FRAG_LOADING');

    // Load key before streaming fragment data
    var dataOnProgress = this.config.progressive;
    if (dataOnProgress && keyLoadingPromise) {
      return keyLoadingPromise.then(function (keyLoadedData) {
        if (!keyLoadedData || _this4.fragContextChanged(keyLoadedData === null || keyLoadedData === void 0 ? void 0 : keyLoadedData.frag)) {
          return null;
        }
        return _this4.fragmentLoader.load(frag, progressCallback);
      }).catch(function (error) {
        return _this4.handleFragLoadError(error);
      });
    }

    // load unencrypted fragment data with progress event,
    // or handle fragment result after key and fragment are finished loading
    return Promise.all([this.fragmentLoader.load(frag, dataOnProgress ? progressCallback : undefined), keyLoadingPromise]).then(function (_ref) {
      var fragLoadedData = _ref[0];
      if (!dataOnProgress && fragLoadedData && progressCallback) {
        progressCallback(fragLoadedData);
      }
      return fragLoadedData;
    }).catch(function (error) {
      return _this4.handleFragLoadError(error);
    });
  };
  _proto.throwIfFragContextChanged = function throwIfFragContextChanged(context) {
    // exit if context changed during event loop
    if (this.fragCurrent === null) {
      throw new Error("frag load aborted, context changed in " + context);
    }
  };
  _proto.doFragPartsLoad = function doFragPartsLoad(frag, partList, partIndex, progressCallback) {
    var _this5 = this;
    return new Promise(function (resolve, reject) {
      var partsLoaded = [];
      var loadPartIndex = function loadPartIndex(index) {
        var part = partList[index];
        _this5.fragmentLoader.loadPart(frag, part, progressCallback).then(function (partLoadedData) {
          partsLoaded[part.index] = partLoadedData;
          var loadedPart = partLoadedData.part;
          _this5.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.FRAG_LOADED, partLoadedData);
          var nextPart = partList[index + 1];
          if (nextPart && nextPart.fragment === frag) {
            loadPartIndex(index + 1);
          } else {
            return resolve({
              frag: frag,
              part: loadedPart,
              partsLoaded: partsLoaded
            });
          }
        }).catch(reject);
      };
      loadPartIndex(partIndex);
    });
  };
  _proto.handleFragLoadError = function handleFragLoadError(error) {
    if ('data' in error) {
      var data = error.data;
      if (error.data && data.details === _errors__WEBPACK_IMPORTED_MODULE_6__.ErrorDetails.INTERNAL_ABORTED) {
        this.handleFragLoadAborted(data.frag, data.part);
      } else {
        this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.ERROR, data);
      }
    } else {
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_6__.ErrorTypes.OTHER_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_6__.ErrorDetails.INTERNAL_EXCEPTION,
        err: error,
        fatal: true
      });
    }
    return null;
  };
  _proto._handleTransmuxerFlush = function _handleTransmuxerFlush(chunkMeta) {
    var context = this.getCurrentContext(chunkMeta);
    if (!context || this.state !== State.PARSING) {
      if (!this.fragCurrent && this.state !== State.STOPPED && this.state !== State.ERROR) {
        this.state = State.IDLE;
      }
      return;
    }
    var frag = context.frag,
      part = context.part,
      level = context.level;
    var now = self.performance.now();
    frag.stats.parsing.end = now;
    if (part) {
      part.stats.parsing.end = now;
    }
    this.updateLevelTiming(frag, part, level, chunkMeta.partial);
  };
  _proto.getCurrentContext = function getCurrentContext(chunkMeta) {
    var levels = this.levels;
    var levelIndex = chunkMeta.level,
      sn = chunkMeta.sn,
      partIndex = chunkMeta.part;
    if (!levels || !levels[levelIndex]) {
      this.warn("Levels object was unset while buffering fragment " + sn + " of level " + levelIndex + ". The current chunk will not be buffered.");
      return null;
    }
    var level = levels[levelIndex];
    var part = partIndex > -1 ? (0,_level_helper__WEBPACK_IMPORTED_MODULE_11__.getPartWith)(level, sn, partIndex) : null;
    var frag = part ? part.fragment : (0,_level_helper__WEBPACK_IMPORTED_MODULE_11__.getFragmentWithSN)(level, sn, this.fragCurrent);
    if (!frag) {
      return null;
    }
    return {
      frag: frag,
      part: part,
      level: level
    };
  };
  _proto.bufferFragmentData = function bufferFragmentData(data, frag, part, chunkMeta) {
    if (!data || this.state !== State.PARSING) {
      return;
    }
    var data1 = data.data1,
      data2 = data.data2;
    var buffer = data1;
    if (data1 && data2) {
      // Combine the moof + mdat so that we buffer with a single append
      buffer = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_8__.appendUint8Array)(data1, data2);
    }
    if (!buffer || !buffer.length) {
      return;
    }
    var segment = {
      type: data.type,
      frag: frag,
      part: part,
      chunkMeta: chunkMeta,
      parent: frag.type,
      data: buffer
    };
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.BUFFER_APPENDING, segment);
    if (data.dropped && data.independent && !part) {
      // Clear buffer so that we reload previous segments sequentially if required
      this.flushBufferGap(frag);
    }
  };
  _proto.flushBufferGap = function flushBufferGap(frag) {
    var media = this.media;
    if (!media) {
      return;
    }
    // If currentTime is not buffered, clear the back buffer so that we can backtrack as much as needed
    if (!_utils_buffer_helper__WEBPACK_IMPORTED_MODULE_3__.BufferHelper.isBuffered(media, media.currentTime)) {
      this.flushMainBuffer(0, frag.start);
      return;
    }
    // Remove back-buffer without interrupting playback to allow back tracking
    var currentTime = media.currentTime;
    var bufferInfo = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_3__.BufferHelper.bufferInfo(media, currentTime, 0);
    var fragDuration = frag.duration;
    var segmentFraction = Math.min(this.config.maxFragLookUpTolerance * 2, fragDuration * 0.25);
    var start = Math.max(Math.min(frag.start - segmentFraction, bufferInfo.end - segmentFraction), currentTime + segmentFraction);
    if (frag.start - start > segmentFraction) {
      this.flushMainBuffer(start, frag.start);
    }
  };
  _proto.getFwdBufferInfo = function getFwdBufferInfo(bufferable, type) {
    var config = this.config;
    var pos = this.getLoadPosition();
    if (!(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(pos)) {
      return null;
    }
    var bufferInfo = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_3__.BufferHelper.bufferInfo(bufferable, pos, config.maxBufferHole);
    // Workaround flaw in getting forward buffer when maxBufferHole is smaller than gap at current pos
    if (bufferInfo.len === 0 && bufferInfo.nextStart !== undefined) {
      var bufferedFragAtPos = this.fragmentTracker.getBufferedFrag(pos, type);
      if (bufferedFragAtPos && bufferInfo.nextStart < bufferedFragAtPos.end) {
        return _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_3__.BufferHelper.bufferInfo(bufferable, pos, Math.max(bufferInfo.nextStart, config.maxBufferHole));
      }
    }
    return bufferInfo;
  };
  _proto.getMaxBufferLength = function getMaxBufferLength(levelBitrate) {
    var config = this.config;
    var maxBufLen;
    if (levelBitrate) {
      maxBufLen = Math.max(8 * config.maxBufferSize / levelBitrate, config.maxBufferLength);
    } else {
      maxBufLen = config.maxBufferLength;
    }
    return Math.min(maxBufLen, config.maxMaxBufferLength);
  };
  _proto.reduceMaxBufferLength = function reduceMaxBufferLength(threshold) {
    var config = this.config;
    var minLength = threshold || config.maxBufferLength;
    if (config.maxMaxBufferLength >= minLength) {
      // reduce max buffer length as it might be too high. we do this to avoid loop flushing ...
      config.maxMaxBufferLength /= 2;
      this.warn("Reduce max buffer length to " + config.maxMaxBufferLength + "s");
      return true;
    }
    return false;
  };
  _proto.getNextFragment = function getNextFragment(pos, levelDetails) {
    var fragments = levelDetails.fragments;
    var fragLen = fragments.length;
    if (!fragLen) {
      return null;
    }

    // find fragment index, contiguous with end of buffer position
    var config = this.config;
    var start = fragments[0].start;
    var frag;
    if (levelDetails.live) {
      var initialLiveManifestSize = config.initialLiveManifestSize;
      if (fragLen < initialLiveManifestSize) {
        this.warn("Not enough fragments to start playback (have: " + fragLen + ", need: " + initialLiveManifestSize + ")");
        return null;
      }
      // The real fragment start times for a live stream are only known after the PTS range for that level is known.
      // In order to discover the range, we load the best matching fragment for that level and demux it.
      // Do not load using live logic if the starting frag is requested - we want to use getFragmentAtPosition() so that
      // we get the fragment matching that start time
      if (!levelDetails.PTSKnown && !this.startFragRequested && this.startPosition === -1) {
        frag = this.getInitialLiveFragment(levelDetails, fragments);
        this.startPosition = frag ? this.hls.liveSyncPosition || frag.start : pos;
      }
    } else if (pos <= start) {
      // VoD playlist: if loadPosition before start of playlist, load first fragment
      frag = fragments[0];
    }

    // If we haven't run into any special cases already, just load the fragment most closely matching the requested position
    if (!frag) {
      var end = config.lowLatencyMode ? levelDetails.partEnd : levelDetails.fragmentEnd;
      frag = this.getFragmentAtPosition(pos, end, levelDetails);
    }
    return this.mapToInitFragWhenRequired(frag);
  };
  _proto.mapToInitFragWhenRequired = function mapToInitFragWhenRequired(frag) {
    // If an initSegment is present, it must be buffered first
    if (frag !== null && frag !== void 0 && frag.initSegment && !(frag !== null && frag !== void 0 && frag.initSegment.data) && !this.bitrateTest) {
      return frag.initSegment;
    }
    return frag;
  };
  _proto.getNextPart = function getNextPart(partList, frag, targetBufferTime) {
    var nextPart = -1;
    var contiguous = false;
    var independentAttrOmitted = true;
    for (var i = 0, len = partList.length; i < len; i++) {
      var part = partList[i];
      independentAttrOmitted = independentAttrOmitted && !part.independent;
      if (nextPart > -1 && targetBufferTime < part.start) {
        break;
      }
      var loaded = part.loaded;
      if (loaded) {
        nextPart = -1;
      } else if ((contiguous || part.independent || independentAttrOmitted) && part.fragment === frag) {
        nextPart = i;
      }
      contiguous = loaded;
    }
    return nextPart;
  };
  _proto.loadedEndOfParts = function loadedEndOfParts(partList, targetBufferTime) {
    var lastPart = partList[partList.length - 1];
    return lastPart && targetBufferTime > lastPart.start && lastPart.loaded;
  }

  /*
   This method is used find the best matching first fragment for a live playlist. This fragment is used to calculate the
   "sliding" of the playlist, which is its offset from the start of playback. After sliding we can compute the real
   start and end times for each fragment in the playlist (after which this method will not need to be called).
  */;
  _proto.getInitialLiveFragment = function getInitialLiveFragment(levelDetails, fragments) {
    var fragPrevious = this.fragPrevious;
    var frag = null;
    if (fragPrevious) {
      if (levelDetails.hasProgramDateTime) {
        // Prefer using PDT, because it can be accurate enough to choose the correct fragment without knowing the level sliding
        this.log("Live playlist, switching playlist, load frag with same PDT: " + fragPrevious.programDateTime);
        frag = (0,_fragment_finders__WEBPACK_IMPORTED_MODULE_10__.findFragmentByPDT)(fragments, fragPrevious.endProgramDateTime, this.config.maxFragLookUpTolerance);
      }
      if (!frag) {
        // SN does not need to be accurate between renditions, but depending on the packaging it may be so.
        var targetSN = fragPrevious.sn + 1;
        if (targetSN >= levelDetails.startSN && targetSN <= levelDetails.endSN) {
          var fragNext = fragments[targetSN - levelDetails.startSN];
          // Ensure that we're staying within the continuity range, since PTS resets upon a new range
          if (fragPrevious.cc === fragNext.cc) {
            frag = fragNext;
            this.log("Live playlist, switching playlist, load frag with next SN: " + frag.sn);
          }
        }
        // It's important to stay within the continuity range if available; otherwise the fragments in the playlist
        // will have the wrong start times
        if (!frag) {
          frag = (0,_fragment_finders__WEBPACK_IMPORTED_MODULE_10__.findFragWithCC)(fragments, fragPrevious.cc);
          if (frag) {
            this.log("Live playlist, switching playlist, load frag with same CC: " + frag.sn);
          }
        }
      }
    } else {
      // Find a new start fragment when fragPrevious is null
      var liveStart = this.hls.liveSyncPosition;
      if (liveStart !== null) {
        frag = this.getFragmentAtPosition(liveStart, this.bitrateTest ? levelDetails.fragmentEnd : levelDetails.edge, levelDetails);
      }
    }
    return frag;
  }

  /*
  This method finds the best matching fragment given the provided position.
   */;
  _proto.getFragmentAtPosition = function getFragmentAtPosition(bufferEnd, end, levelDetails) {
    var config = this.config;
    var fragPrevious = this.fragPrevious;
    var fragments = levelDetails.fragments,
      endSN = levelDetails.endSN;
    var fragmentHint = levelDetails.fragmentHint;
    var tolerance = config.maxFragLookUpTolerance;
    var loadingParts = !!(config.lowLatencyMode && levelDetails.partList && fragmentHint);
    if (loadingParts && fragmentHint && !this.bitrateTest) {
      // Include incomplete fragment with parts at end
      fragments = fragments.concat(fragmentHint);
      endSN = fragmentHint.sn;
    }
    var frag;
    if (bufferEnd < end) {
      var lookupTolerance = bufferEnd > end - tolerance ? 0 : tolerance;
      // Remove the tolerance if it would put the bufferEnd past the actual end of stream
      // Uses buffer and sequence number to calculate switch segment (required if using EXT-X-DISCONTINUITY-SEQUENCE)
      frag = (0,_fragment_finders__WEBPACK_IMPORTED_MODULE_10__.findFragmentByPTS)(fragPrevious, fragments, bufferEnd, lookupTolerance);
    } else {
      // reach end of playlist
      frag = fragments[fragments.length - 1];
    }
    if (frag) {
      var curSNIdx = frag.sn - levelDetails.startSN;
      // Move fragPrevious forward to support forcing the next fragment to load
      // when the buffer catches up to a previously buffered range.
      if (this.fragmentTracker.getState(frag) === _fragment_tracker__WEBPACK_IMPORTED_MODULE_2__.FragmentState.OK) {
        fragPrevious = frag;
      }
      if (fragPrevious && frag.sn === fragPrevious.sn && !loadingParts) {
        // Force the next fragment to load if the previous one was already selected. This can occasionally happen with
        // non-uniform fragment durations
        var sameLevel = fragPrevious && frag.level === fragPrevious.level;
        if (sameLevel) {
          var nextFrag = fragments[curSNIdx + 1];
          if (frag.sn < endSN && this.fragmentTracker.getState(nextFrag) !== _fragment_tracker__WEBPACK_IMPORTED_MODULE_2__.FragmentState.OK) {
            this.log("SN " + frag.sn + " just loaded, load next one: " + nextFrag.sn);
            frag = nextFrag;
          } else {
            frag = null;
          }
        }
      }
    }
    return frag;
  };
  _proto.synchronizeToLiveEdge = function synchronizeToLiveEdge(levelDetails) {
    var config = this.config,
      media = this.media;
    if (!media) {
      return;
    }
    var liveSyncPosition = this.hls.liveSyncPosition;
    var currentTime = media.currentTime;
    var start = levelDetails.fragments[0].start;
    var end = levelDetails.edge;
    var withinSlidingWindow = currentTime >= start - config.maxFragLookUpTolerance && currentTime <= end;
    // Continue if we can seek forward to sync position or if current time is outside of sliding window
    if (liveSyncPosition !== null && media.duration > liveSyncPosition && (currentTime < liveSyncPosition || !withinSlidingWindow)) {
      // Continue if buffer is starving or if current time is behind max latency
      var maxLatency = config.liveMaxLatencyDuration !== undefined ? config.liveMaxLatencyDuration : config.liveMaxLatencyDurationCount * levelDetails.targetduration;
      if (!withinSlidingWindow && media.readyState < 4 || currentTime < end - maxLatency) {
        if (!this.loadedmetadata) {
          this.nextLoadPosition = liveSyncPosition;
        }
        // Only seek if ready and there is not a significant forward buffer available for playback
        if (media.readyState) {
          this.warn("Playback: " + currentTime.toFixed(3) + " is located too far from the end of live sliding playlist: " + end + ", reset currentTime to : " + liveSyncPosition.toFixed(3));
          media.currentTime = liveSyncPosition;
        }
      }
    }
  };
  _proto.alignPlaylists = function alignPlaylists(details, previousDetails) {
    var levels = this.levels,
      levelLastLoaded = this.levelLastLoaded,
      fragPrevious = this.fragPrevious;
    var lastLevel = levelLastLoaded !== null ? levels[levelLastLoaded] : null;

    // FIXME: If not for `shouldAlignOnDiscontinuities` requiring fragPrevious.cc,
    //  this could all go in level-helper mergeDetails()
    var length = details.fragments.length;
    if (!length) {
      this.warn("No fragments in live playlist");
      return 0;
    }
    var slidingStart = details.fragments[0].start;
    var firstLevelLoad = !previousDetails;
    var aligned = details.alignedSliding && (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(slidingStart);
    if (firstLevelLoad || !aligned && !slidingStart) {
      (0,_utils_discontinuities__WEBPACK_IMPORTED_MODULE_9__.alignStream)(fragPrevious, lastLevel, details);
      var alignedSlidingStart = details.fragments[0].start;
      this.log("Live playlist sliding: " + alignedSlidingStart.toFixed(2) + " start-sn: " + (previousDetails ? previousDetails.startSN : 'na') + "->" + details.startSN + " prev-sn: " + (fragPrevious ? fragPrevious.sn : 'na') + " fragments: " + length);
      return alignedSlidingStart;
    }
    return slidingStart;
  };
  _proto.waitForCdnTuneIn = function waitForCdnTuneIn(details) {
    // Wait for Low-Latency CDN Tune-in to get an updated playlist
    var advancePartLimit = 3;
    return details.live && details.canBlockReload && details.partTarget && details.tuneInGoal > Math.max(details.partHoldBack, details.partTarget * advancePartLimit);
  };
  _proto.setStartPosition = function setStartPosition(details, sliding) {
    // compute start position if set to -1. use it straight away if value is defined
    var startPosition = this.startPosition;
    if (startPosition < sliding) {
      startPosition = -1;
    }
    if (startPosition === -1 || this.lastCurrentTime === -1) {
      // first, check if start time offset has been set in playlist, if yes, use this value
      var startTimeOffset = details.startTimeOffset;
      if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(startTimeOffset)) {
        startPosition = sliding + startTimeOffset;
        if (startTimeOffset < 0) {
          startPosition += details.totalduration;
        }
        startPosition = Math.min(Math.max(sliding, startPosition), sliding + details.totalduration);
        this.log("Start time offset " + startTimeOffset + " found in playlist, adjust startPosition to " + startPosition);
        this.startPosition = startPosition;
      } else if (details.live) {
        // Leave this.startPosition at -1, so that we can use `getInitialLiveFragment` logic when startPosition has
        // not been specified via the config or an as an argument to startLoad (#3736).
        startPosition = this.hls.liveSyncPosition || sliding;
      } else {
        this.startPosition = startPosition = 0;
      }
      this.lastCurrentTime = startPosition;
    }
    this.nextLoadPosition = startPosition;
  };
  _proto.getLoadPosition = function getLoadPosition() {
    var media = this.media;
    // if we have not yet loaded any fragment, start loading from start position
    var pos = 0;
    if (this.loadedmetadata && media) {
      pos = media.currentTime;
    } else if (this.nextLoadPosition) {
      pos = this.nextLoadPosition;
    }
    return pos;
  };
  _proto.handleFragLoadAborted = function handleFragLoadAborted(frag, part) {
    if (this.transmuxer && frag.sn !== 'initSegment' && frag.stats.aborted) {
      this.warn("Fragment " + frag.sn + (part ? ' part' + part.index : '') + " of level " + frag.level + " was aborted");
      this.resetFragmentLoading(frag);
    }
  };
  _proto.resetFragmentLoading = function resetFragmentLoading(frag) {
    if (!this.fragCurrent || !this.fragContextChanged(frag) && this.state !== State.FRAG_LOADING_WAITING_RETRY) {
      this.state = State.IDLE;
    }
  };
  _proto.onFragmentOrKeyLoadError = function onFragmentOrKeyLoadError(filterType, data) {
    if (data.fatal) {
      this.stopLoad();
      this.state = State.ERROR;
      return;
    }
    var config = this.config;
    if (data.chunkMeta) {
      // Parsing Error: no retries
      var context = this.getCurrentContext(data.chunkMeta);
      if (context) {
        data.frag = context.frag;
        data.levelRetry = true;
        this.fragLoadError = config.fragLoadingMaxRetry;
      }
    }
    var frag = data.frag;
    // Handle frag error related to caller's filterType
    if (!frag || frag.type !== filterType) {
      return;
    }
    var fragCurrent = this.fragCurrent;
    console.assert(fragCurrent && frag.sn === fragCurrent.sn && frag.level === fragCurrent.level && frag.urlId === fragCurrent.urlId, 'Frag load error must match current frag to retry');
    // keep retrying until the limit will be reached
    if (this.fragLoadError + 1 <= config.fragLoadingMaxRetry) {
      if (!this.loadedmetadata) {
        this.startFragRequested = false;
        this.nextLoadPosition = this.startPosition;
      }
      // exponential backoff capped to config.fragLoadingMaxRetryTimeout
      var delay = Math.min(Math.pow(2, this.fragLoadError) * config.fragLoadingRetryDelay, config.fragLoadingMaxRetryTimeout);
      this.warn("Fragment " + frag.sn + " of " + filterType + " " + frag.level + " failed to load, retrying in " + delay + "ms");
      this.retryDate = self.performance.now() + delay;
      this.fragLoadError++;
      this.state = State.FRAG_LOADING_WAITING_RETRY;
    } else if (data.levelRetry) {
      if (filterType === _types_loader__WEBPACK_IMPORTED_MODULE_15__.PlaylistLevelType.AUDIO) {
        // Reset current fragment since audio track audio is essential and may not have a fail-over track
        this.fragCurrent = null;
      }
      // Fragment errors that result in a level switch or redundant fail-over
      // should reset the stream controller state to idle
      this.fragLoadError = 0;
      this.state = State.IDLE;
    } else {
      _utils_logger__WEBPACK_IMPORTED_MODULE_4__.logger.error(data.details + " reaches max retry, redispatch as fatal ...");
      // switch error to fatal
      data.fatal = true;
      this.hls.stopLoad();
      this.state = State.ERROR;
    }
  };
  _proto.afterBufferFlushed = function afterBufferFlushed(media, bufferType, playlistType) {
    if (!media) {
      return;
    }
    // After successful buffer flushing, filter flushed fragments from bufferedFrags use mediaBuffered instead of media
    // (so that we will check against video.buffered ranges in case of alt audio track)
    var bufferedTimeRanges = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_3__.BufferHelper.getBuffered(media);
    this.fragmentTracker.detectEvictedFragments(bufferType, bufferedTimeRanges, playlistType);
    if (this.state === State.ENDED) {
      this.resetLoadingState();
    }
  };
  _proto.resetLoadingState = function resetLoadingState() {
    this.log('Reset loading state');
    this.fragCurrent = null;
    this.fragPrevious = null;
    this.state = State.IDLE;
  };
  _proto.resetStartWhenNotLoaded = function resetStartWhenNotLoaded(level) {
    // if loadedmetadata is not set, it means that first frag request failed
    // in that case, reset startFragRequested flag
    if (!this.loadedmetadata) {
      this.startFragRequested = false;
      var details = this.levels ? this.levels[level].details : null;
      if (details !== null && details !== void 0 && details.live) {
        // Update the start position and return to IDLE to recover live start
        this.startPosition = -1;
        this.setStartPosition(details, 0);
        this.resetLoadingState();
      } else {
        this.nextLoadPosition = this.startPosition;
      }
    }
  };
  _proto.updateLevelTiming = function updateLevelTiming(frag, part, level, partial) {
    var _this6 = this;
    var details = level.details;
    console.assert(!!details, 'level.details must be defined');
    var parsed = Object.keys(frag.elementaryStreams).reduce(function (result, type) {
      var info = frag.elementaryStreams[type];
      if (info) {
        var parsedDuration = info.endPTS - info.startPTS;
        if (parsedDuration <= 0) {
          // Destroy the transmuxer after it's next time offset failed to advance because duration was <= 0.
          // The new transmuxer will be configured with a time offset matching the next fragment start,
          // preventing the timeline from shifting.
          _this6.warn("Could not parse fragment " + frag.sn + " " + type + " duration reliably (" + parsedDuration + ")");
          return result || false;
        }
        var drift = partial ? 0 : (0,_level_helper__WEBPACK_IMPORTED_MODULE_11__.updateFragPTSDTS)(details, frag, info.startPTS, info.endPTS, info.startDTS, info.endDTS);
        _this6.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.LEVEL_PTS_UPDATED, {
          details: details,
          level: level,
          drift: drift,
          type: type,
          frag: frag,
          start: info.startPTS,
          end: info.endPTS
        });
        return true;
      }
      return result;
    }, false);
    if (!parsed) {
      this.warn("Found no media in fragment " + frag.sn + " of level " + level.id + " resetting transmuxer to fallback to playlist timing");
      this.resetTransmuxer();
    }
    this.state = State.PARSED;
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_5__.Events.FRAG_PARSED, {
      frag: frag,
      part: part
    });
  };
  _proto.resetTransmuxer = function resetTransmuxer() {
    if (this.transmuxer) {
      this.transmuxer.destroy();
      this.transmuxer = null;
    }
  };
  _createClass(BaseStreamController, [{
    key: "state",
    get: function get() {
      return this._state;
    },
    set: function set(nextState) {
      var previousState = this._state;
      if (previousState !== nextState) {
        this._state = nextState;
        this.log(previousState + "->" + nextState);
      }
    }
  }]);
  return BaseStreamController;
}(_task_loop__WEBPACK_IMPORTED_MODULE_1__["default"]);


/***/ }),

/***/ "./src/controller/buffer-controller.ts":
/*!*********************************************!*\
  !*** ./src/controller/buffer-controller.ts ***!
  \*********************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ BufferController)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../utils/buffer-helper */ "./src/utils/buffer-helper.ts");
/* harmony import */ var _utils_mediasource_helper__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../utils/mediasource-helper */ "./src/utils/mediasource-helper.ts");
/* harmony import */ var _loader_fragment__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../loader/fragment */ "./src/loader/fragment.ts");
/* harmony import */ var _buffer_operation_queue__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ./buffer-operation-queue */ "./src/controller/buffer-operation-queue.ts");












var MediaSource = (0,_utils_mediasource_helper__WEBPACK_IMPORTED_MODULE_5__.getMediaSource)();
var VIDEO_CODEC_PROFILE_REPACE = /([ha]vc.)(?:\.[^.,]+)+/;
var BufferController = /*#__PURE__*/function () {
  // The level details used to determine duration, target-duration and live

  // cache the self generated object url to detect hijack of video tag

  // A queue of buffer operations which require the SourceBuffer to not be updating upon execution

  // References to event listeners for each SourceBuffer, so that they can be referenced for event removal

  // The number of BUFFER_CODEC events received before any sourceBuffers are created

  // The total number of BUFFER_CODEC events received

  // A reference to the attached media element

  // A reference to the active media source

  // Last MP3 audio chunk appended

  // counters

  function BufferController(hls) {
    var _this = this;
    this.details = null;
    this._objectUrl = null;
    this.operationQueue = void 0;
    this.listeners = void 0;
    this.hls = void 0;
    this.bufferCodecEventsExpected = 0;
    this._bufferCodecEventsTotal = 0;
    this.media = null;
    this.mediaSource = null;
    this.lastMpegAudioChunk = null;
    this.appendError = 0;
    this.tracks = {};
    this.pendingTracks = {};
    this.sourceBuffer = void 0;
    this._onMediaSourceOpen = function () {
      var media = _this.media,
        mediaSource = _this.mediaSource;
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log('[buffer-controller]: Media source opened');
      if (media) {
        media.removeEventListener('emptied', _this._onMediaEmptied);
        _this.updateMediaElementDuration();
        _this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_ATTACHED, {
          media: media
        });
      }
      if (mediaSource) {
        // once received, don't listen anymore to sourceopen event
        mediaSource.removeEventListener('sourceopen', _this._onMediaSourceOpen);
      }
      _this.checkPendingTracks();
    };
    this._onMediaSourceClose = function () {
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log('[buffer-controller]: Media source closed');
    };
    this._onMediaSourceEnded = function () {
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log('[buffer-controller]: Media source ended');
    };
    this._onMediaEmptied = function () {
      var media = _this.media,
        _objectUrl = _this._objectUrl;
      if (media && media.src !== _objectUrl) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.error("Media element src was set while attaching MediaSource (" + _objectUrl + " > " + media.src + ")");
      }
    };
    this.hls = hls;
    this._initSourceBuffer();
    this.registerListeners();
  }
  var _proto = BufferController.prototype;
  _proto.hasSourceTypes = function hasSourceTypes() {
    return this.getSourceBufferTypes().length > 0 || Object.keys(this.pendingTracks).length > 0;
  };
  _proto.destroy = function destroy() {
    this.unregisterListeners();
    this.details = null;
    this.lastMpegAudioChunk = null;
  };
  _proto.registerListeners = function registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_PARSED, this.onManifestParsed, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_RESET, this.onBufferReset, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_APPENDING, this.onBufferAppending, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_CODECS, this.onBufferCodecs, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_EOS, this.onBufferEos, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_UPDATED, this.onLevelUpdated, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_PARSED, this.onFragParsed, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_CHANGED, this.onFragChanged, this);
  };
  _proto.unregisterListeners = function unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_PARSED, this.onManifestParsed, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_RESET, this.onBufferReset, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_APPENDING, this.onBufferAppending, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_CODECS, this.onBufferCodecs, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_EOS, this.onBufferEos, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_UPDATED, this.onLevelUpdated, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_PARSED, this.onFragParsed, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_CHANGED, this.onFragChanged, this);
  };
  _proto._initSourceBuffer = function _initSourceBuffer() {
    this.sourceBuffer = {};
    this.operationQueue = new _buffer_operation_queue__WEBPACK_IMPORTED_MODULE_7__["default"](this.sourceBuffer);
    this.listeners = {
      audio: [],
      video: [],
      audiovideo: []
    };
    this.lastMpegAudioChunk = null;
  };
  _proto.onManifestParsed = function onManifestParsed(event, data) {
    // in case of alt audio 2 BUFFER_CODECS events will be triggered, one per stream controller
    // sourcebuffers will be created all at once when the expected nb of tracks will be reached
    // in case alt audio is not used, only one BUFFER_CODEC event will be fired from main stream controller
    // it will contain the expected nb of source buffers, no need to compute it
    var codecEvents = 2;
    if (data.audio && !data.video || !data.altAudio) {
      codecEvents = 1;
    }
    this.bufferCodecEventsExpected = this._bufferCodecEventsTotal = codecEvents;
    this.details = null;
    _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log(this.bufferCodecEventsExpected + " bufferCodec event(s) expected");
  };
  _proto.onMediaAttaching = function onMediaAttaching(event, data) {
    var media = this.media = data.media;
    if (media && MediaSource) {
      var ms = this.mediaSource = new MediaSource();
      // MediaSource listeners are arrow functions with a lexical scope, and do not need to be bound
      ms.addEventListener('sourceopen', this._onMediaSourceOpen);
      ms.addEventListener('sourceended', this._onMediaSourceEnded);
      ms.addEventListener('sourceclose', this._onMediaSourceClose);
      // link video and media Source
      media.src = self.URL.createObjectURL(ms);
      // cache the locally generated object url
      this._objectUrl = media.src;
      media.addEventListener('emptied', this._onMediaEmptied);
    }
  };
  _proto.onMediaDetaching = function onMediaDetaching() {
    var media = this.media,
      mediaSource = this.mediaSource,
      _objectUrl = this._objectUrl;
    if (mediaSource) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log('[buffer-controller]: media source detaching');
      if (mediaSource.readyState === 'open') {
        try {
          // endOfStream could trigger exception if any sourcebuffer is in updating state
          // we don't really care about checking sourcebuffer state here,
          // as we are anyway detaching the MediaSource
          // let's just avoid this exception to propagate
          mediaSource.endOfStream();
        } catch (err) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn("[buffer-controller]: onMediaDetaching: " + err.message + " while calling endOfStream");
        }
      }
      // Clean up the SourceBuffers by invoking onBufferReset
      this.onBufferReset();
      mediaSource.removeEventListener('sourceopen', this._onMediaSourceOpen);
      mediaSource.removeEventListener('sourceended', this._onMediaSourceEnded);
      mediaSource.removeEventListener('sourceclose', this._onMediaSourceClose);

      // Detach properly the MediaSource from the HTMLMediaElement as
      // suggested in https://github.com/w3c/media-source/issues/53.
      if (media) {
        media.removeEventListener('emptied', this._onMediaEmptied);
        if (_objectUrl) {
          self.URL.revokeObjectURL(_objectUrl);
        }

        // clean up video tag src only if it's our own url. some external libraries might
        // hijack the video tag and change its 'src' without destroying the Hls instance first
        if (media.src === _objectUrl) {
          media.removeAttribute('src');
          media.load();
        } else {
          _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn('[buffer-controller]: media.src was changed by a third party - skip cleanup');
        }
      }
      this.mediaSource = null;
      this.media = null;
      this._objectUrl = null;
      this.bufferCodecEventsExpected = this._bufferCodecEventsTotal;
      this.pendingTracks = {};
      this.tracks = {};
    }
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_DETACHED, undefined);
  };
  _proto.onBufferReset = function onBufferReset() {
    var _this2 = this;
    this.getSourceBufferTypes().forEach(function (type) {
      var sb = _this2.sourceBuffer[type];
      try {
        if (sb) {
          _this2.removeBufferListeners(type);
          if (_this2.mediaSource) {
            _this2.mediaSource.removeSourceBuffer(sb);
          }
          // Synchronously remove the SB from the map before the next call in order to prevent an async function from
          // accessing it
          _this2.sourceBuffer[type] = undefined;
        }
      } catch (err) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn("[buffer-controller]: Failed to reset the " + type + " buffer", err);
      }
    });
    this._initSourceBuffer();
  };
  _proto.onBufferCodecs = function onBufferCodecs(event, data) {
    var _this3 = this;
    var sourceBufferCount = this.getSourceBufferTypes().length;
    Object.keys(data).forEach(function (trackName) {
      if (sourceBufferCount) {
        // check if SourceBuffer codec needs to change
        var track = _this3.tracks[trackName];
        if (track && typeof track.buffer.changeType === 'function') {
          var _data$trackName = data[trackName],
            id = _data$trackName.id,
            codec = _data$trackName.codec,
            levelCodec = _data$trackName.levelCodec,
            container = _data$trackName.container,
            metadata = _data$trackName.metadata;
          var currentCodec = (track.levelCodec || track.codec).replace(VIDEO_CODEC_PROFILE_REPACE, '$1');
          var nextCodec = (levelCodec || codec).replace(VIDEO_CODEC_PROFILE_REPACE, '$1');
          if (currentCodec !== nextCodec) {
            var mimeType = container + ";codecs=" + (levelCodec || codec);
            _this3.appendChangeType(trackName, mimeType);
            _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log("[buffer-controller]: switching codec " + currentCodec + " to " + nextCodec);
            _this3.tracks[trackName] = {
              buffer: track.buffer,
              codec: codec,
              container: container,
              levelCodec: levelCodec,
              metadata: metadata,
              id: id
            };
          }
        }
      } else {
        // if source buffer(s) not created yet, appended buffer tracks in this.pendingTracks
        _this3.pendingTracks[trackName] = data[trackName];
      }
    });

    // if sourcebuffers already created, do nothing ...
    if (sourceBufferCount) {
      return;
    }
    this.bufferCodecEventsExpected = Math.max(this.bufferCodecEventsExpected - 1, 0);
    if (this.mediaSource && this.mediaSource.readyState === 'open') {
      this.checkPendingTracks();
    }
  };
  _proto.appendChangeType = function appendChangeType(type, mimeType) {
    var _this4 = this;
    var operationQueue = this.operationQueue;
    var operation = {
      execute: function execute() {
        var sb = _this4.sourceBuffer[type];
        if (sb) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log("[buffer-controller]: changing " + type + " sourceBuffer type to " + mimeType);
          sb.changeType(mimeType);
        }
        operationQueue.shiftAndExecuteNext(type);
      },
      onStart: function onStart() {},
      onComplete: function onComplete() {},
      onError: function onError(e) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn("[buffer-controller]: Failed to change " + type + " SourceBuffer type", e);
      }
    };
    operationQueue.append(operation, type);
  };
  _proto.onBufferAppending = function onBufferAppending(event, eventData) {
    var _this5 = this;
    var hls = this.hls,
      operationQueue = this.operationQueue,
      tracks = this.tracks;
    var data = eventData.data,
      type = eventData.type,
      frag = eventData.frag,
      part = eventData.part,
      chunkMeta = eventData.chunkMeta;
    var chunkStats = chunkMeta.buffering[type];
    var bufferAppendingStart = self.performance.now();
    chunkStats.start = bufferAppendingStart;
    var fragBuffering = frag.stats.buffering;
    var partBuffering = part ? part.stats.buffering : null;
    if (fragBuffering.start === 0) {
      fragBuffering.start = bufferAppendingStart;
    }
    if (partBuffering && partBuffering.start === 0) {
      partBuffering.start = bufferAppendingStart;
    }

    // TODO: Only update timestampOffset when audio/mpeg fragment or part is not contiguous with previously appended
    // Adjusting `SourceBuffer.timestampOffset` (desired point in the timeline where the next frames should be appended)
    // in Chrome browser when we detect MPEG audio container and time delta between level PTS and `SourceBuffer.timestampOffset`
    // is greater than 100ms (this is enough to handle seek for VOD or level change for LIVE videos).
    // More info here: https://github.com/video-dev/hls.js/issues/332#issuecomment-257986486
    var audioTrack = tracks.audio;
    var checkTimestampOffset = false;
    if (type === 'audio' && (audioTrack === null || audioTrack === void 0 ? void 0 : audioTrack.container) === 'audio/mpeg') {
      checkTimestampOffset = !this.lastMpegAudioChunk || chunkMeta.id === 1 || this.lastMpegAudioChunk.sn !== chunkMeta.sn;
      this.lastMpegAudioChunk = chunkMeta;
    }
    var fragStart = frag.start;
    var operation = {
      execute: function execute() {
        chunkStats.executeStart = self.performance.now();
        if (checkTimestampOffset) {
          var sb = _this5.sourceBuffer[type];
          if (sb) {
            var delta = fragStart - sb.timestampOffset;
            if (Math.abs(delta) >= 0.1) {
              _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log("[buffer-controller]: Updating audio SourceBuffer timestampOffset to " + fragStart + " (delta: " + delta + ") sn: " + frag.sn + ")");
              sb.timestampOffset = fragStart;
            }
          }
        }
        _this5.appendExecutor(data, type);
      },
      onStart: function onStart() {
        // logger.debug(`[buffer-controller]: ${type} SourceBuffer updatestart`);
      },
      onComplete: function onComplete() {
        // logger.debug(`[buffer-controller]: ${type} SourceBuffer updateend`);
        var end = self.performance.now();
        chunkStats.executeEnd = chunkStats.end = end;
        if (fragBuffering.first === 0) {
          fragBuffering.first = end;
        }
        if (partBuffering && partBuffering.first === 0) {
          partBuffering.first = end;
        }
        var sourceBuffer = _this5.sourceBuffer;
        var timeRanges = {};
        for (var _type in sourceBuffer) {
          timeRanges[_type] = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_4__.BufferHelper.getBuffered(sourceBuffer[_type]);
        }
        _this5.appendError = 0;
        _this5.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_APPENDED, {
          type: type,
          frag: frag,
          part: part,
          chunkMeta: chunkMeta,
          parent: frag.type,
          timeRanges: timeRanges
        });
      },
      onError: function onError(err) {
        // in case any error occured while appending, put back segment in segments table
        _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.error("[buffer-controller]: Error encountered while trying to append to the " + type + " SourceBuffer", err);
        var event = {
          type: _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorTypes.MEDIA_ERROR,
          parent: frag.type,
          details: _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorDetails.BUFFER_APPEND_ERROR,
          err: err,
          fatal: false
        };
        if (err.code === DOMException.QUOTA_EXCEEDED_ERR) {
          // QuotaExceededError: http://www.w3.org/TR/html5/infrastructure.html#quotaexceedederror
          // let's stop appending any segments, and report BUFFER_FULL_ERROR error
          event.details = _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorDetails.BUFFER_FULL_ERROR;
        } else {
          _this5.appendError++;
          event.details = _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorDetails.BUFFER_APPEND_ERROR;
          /* with UHD content, we could get loop of quota exceeded error until
            browser is able to evict some data from sourcebuffer. Retrying can help recover.
          */
          if (_this5.appendError > hls.config.appendErrorMaxRetry) {
            _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.error("[buffer-controller]: Failed " + hls.config.appendErrorMaxRetry + " times to append segment in sourceBuffer");
            event.fatal = true;
            hls.stopLoad();
          }
        }
        hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, event);
      }
    };
    operationQueue.append(operation, type);
  };
  _proto.onBufferFlushing = function onBufferFlushing(event, data) {
    var _this6 = this;
    var operationQueue = this.operationQueue;
    var flushOperation = function flushOperation(type) {
      return {
        execute: _this6.removeExecutor.bind(_this6, type, data.startOffset, data.endOffset),
        onStart: function onStart() {
          // logger.debug(`[buffer-controller]: Started flushing ${data.startOffset} -> ${data.endOffset} for ${type} Source Buffer`);
        },
        onComplete: function onComplete() {
          // logger.debug(`[buffer-controller]: Finished flushing ${data.startOffset} -> ${data.endOffset} for ${type} Source Buffer`);
          _this6.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_FLUSHED, {
            type: type
          });
        },
        onError: function onError(e) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn("[buffer-controller]: Failed to remove from " + type + " SourceBuffer", e);
        }
      };
    };
    if (data.type) {
      operationQueue.append(flushOperation(data.type), data.type);
    } else {
      this.getSourceBufferTypes().forEach(function (type) {
        operationQueue.append(flushOperation(type), type);
      });
    }
  };
  _proto.onFragParsed = function onFragParsed(event, data) {
    var _this7 = this;
    var frag = data.frag,
      part = data.part;
    var buffersAppendedTo = [];
    var elementaryStreams = part ? part.elementaryStreams : frag.elementaryStreams;
    if (elementaryStreams[_loader_fragment__WEBPACK_IMPORTED_MODULE_6__.ElementaryStreamTypes.AUDIOVIDEO]) {
      buffersAppendedTo.push('audiovideo');
    } else {
      if (elementaryStreams[_loader_fragment__WEBPACK_IMPORTED_MODULE_6__.ElementaryStreamTypes.AUDIO]) {
        buffersAppendedTo.push('audio');
      }
      if (elementaryStreams[_loader_fragment__WEBPACK_IMPORTED_MODULE_6__.ElementaryStreamTypes.VIDEO]) {
        buffersAppendedTo.push('video');
      }
    }
    var onUnblocked = function onUnblocked() {
      var now = self.performance.now();
      frag.stats.buffering.end = now;
      if (part) {
        part.stats.buffering.end = now;
      }
      var stats = part ? part.stats : frag.stats;
      _this7.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_BUFFERED, {
        frag: frag,
        part: part,
        stats: stats,
        id: frag.type
      });
    };
    if (buffersAppendedTo.length === 0) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn("Fragments must have at least one ElementaryStreamType set. type: " + frag.type + " level: " + frag.level + " sn: " + frag.sn);
    }
    this.blockBuffers(onUnblocked, buffersAppendedTo);
  };
  _proto.onFragChanged = function onFragChanged(event, data) {
    this.flushBackBuffer();
  }

  // on BUFFER_EOS mark matching sourcebuffer(s) as ended and trigger checkEos()
  // an undefined data.type will mark all buffers as EOS.
  ;
  _proto.onBufferEos = function onBufferEos(event, data) {
    var _this8 = this;
    var ended = this.getSourceBufferTypes().reduce(function (acc, type) {
      var sb = _this8.sourceBuffer[type];
      if (sb && (!data.type || data.type === type)) {
        sb.ending = true;
        if (!sb.ended) {
          sb.ended = true;
          _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log("[buffer-controller]: " + type + " sourceBuffer now EOS");
        }
      }
      return acc && !!(!sb || sb.ended);
    }, true);
    if (ended) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log("[buffer-controller]: Queueing mediaSource.endOfStream()");
      this.blockBuffers(function () {
        _this8.getSourceBufferTypes().forEach(function (type) {
          var sb = _this8.sourceBuffer[type];
          if (sb) {
            sb.ending = false;
          }
        });
        var mediaSource = _this8.mediaSource;
        if (!mediaSource || mediaSource.readyState !== 'open') {
          if (mediaSource) {
            _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.info("[buffer-controller]: Could not call mediaSource.endOfStream(). mediaSource.readyState: " + mediaSource.readyState);
          }
          return;
        }
        _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log("[buffer-controller]: Calling mediaSource.endOfStream()");
        // Allow this to throw and be caught by the enqueueing function
        mediaSource.endOfStream();
      });
    }
  };
  _proto.onLevelUpdated = function onLevelUpdated(event, _ref) {
    var details = _ref.details;
    if (!details.fragments.length) {
      return;
    }
    this.details = details;
    if (this.getSourceBufferTypes().length) {
      this.blockBuffers(this.updateMediaElementDuration.bind(this));
    } else {
      this.updateMediaElementDuration();
    }
  };
  _proto.flushBackBuffer = function flushBackBuffer() {
    var hls = this.hls,
      details = this.details,
      media = this.media,
      sourceBuffer = this.sourceBuffer;
    if (!media || details === null) {
      return;
    }
    var sourceBufferTypes = this.getSourceBufferTypes();
    if (!sourceBufferTypes.length) {
      return;
    }

    // Support for deprecated liveBackBufferLength
    var backBufferLength = details.live && hls.config.liveBackBufferLength !== null ? hls.config.liveBackBufferLength : hls.config.backBufferLength;
    if (!(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(backBufferLength) || backBufferLength < 0) {
      return;
    }
    var currentTime = media.currentTime;
    var targetDuration = details.levelTargetDuration;
    var maxBackBufferLength = Math.max(backBufferLength, targetDuration);
    var targetBackBufferPosition = Math.floor(currentTime / targetDuration) * targetDuration - maxBackBufferLength;
    sourceBufferTypes.forEach(function (type) {
      var sb = sourceBuffer[type];
      if (sb) {
        var buffered = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_4__.BufferHelper.getBuffered(sb);
        // when target buffer start exceeds actual buffer start
        if (buffered.length > 0 && targetBackBufferPosition > buffered.start(0)) {
          hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BACK_BUFFER_REACHED, {
            bufferEnd: targetBackBufferPosition
          });

          // Support for deprecated event:
          if (details.live) {
            hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LIVE_BACK_BUFFER_REACHED, {
              bufferEnd: targetBackBufferPosition
            });
          } else if (sb.ended && buffered.end(buffered.length - 1) - currentTime < targetDuration * 2) {
            _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.info("[buffer-controller]: Cannot flush " + type + " back buffer while SourceBuffer is in ended state");
            return;
          }
          hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_FLUSHING, {
            startOffset: 0,
            endOffset: targetBackBufferPosition,
            type: type
          });
        }
      }
    });
  }

  /**
   * Update Media Source duration to current level duration or override to Infinity if configuration parameter
   * 'liveDurationInfinity` is set to `true`
   * More details: https://github.com/video-dev/hls.js/issues/355
   */;
  _proto.updateMediaElementDuration = function updateMediaElementDuration() {
    if (!this.details || !this.media || !this.mediaSource || this.mediaSource.readyState !== 'open') {
      return;
    }
    var details = this.details,
      hls = this.hls,
      media = this.media,
      mediaSource = this.mediaSource;
    var levelDuration = details.fragments[0].start + details.totalduration;
    var mediaDuration = media.duration;
    var msDuration = (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(mediaSource.duration) ? mediaSource.duration : 0;
    if (details.live && hls.config.liveDurationInfinity) {
      // Override duration to Infinity
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log('[buffer-controller]: Media Source duration is set to Infinity');
      mediaSource.duration = Infinity;
      this.updateSeekableRange(details);
    } else if (levelDuration > msDuration && levelDuration > mediaDuration || !(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(mediaDuration)) {
      // levelDuration was the last value we set.
      // not using mediaSource.duration as the browser may tweak this value
      // only update Media Source duration if its value increase, this is to avoid
      // flushing already buffered portion when switching between quality level
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log("[buffer-controller]: Updating Media Source duration to " + levelDuration.toFixed(3));
      mediaSource.duration = levelDuration;
    }
  };
  _proto.updateSeekableRange = function updateSeekableRange(levelDetails) {
    var mediaSource = this.mediaSource;
    var fragments = levelDetails.fragments;
    var len = fragments.length;
    if (len && levelDetails.live && mediaSource !== null && mediaSource !== void 0 && mediaSource.setLiveSeekableRange) {
      var start = Math.max(0, fragments[0].start);
      var end = Math.max(start, start + levelDetails.totalduration);
      mediaSource.setLiveSeekableRange(start, end);
    }
  };
  _proto.checkPendingTracks = function checkPendingTracks() {
    var bufferCodecEventsExpected = this.bufferCodecEventsExpected,
      operationQueue = this.operationQueue,
      pendingTracks = this.pendingTracks;

    // Check if we've received all of the expected bufferCodec events. When none remain, create all the sourceBuffers at once.
    // This is important because the MSE spec allows implementations to throw QuotaExceededErrors if creating new sourceBuffers after
    // data has been appended to existing ones.
    // 2 tracks is the max (one for audio, one for video). If we've reach this max go ahead and create the buffers.
    var pendingTracksCount = Object.keys(pendingTracks).length;
    if (pendingTracksCount && !bufferCodecEventsExpected || pendingTracksCount === 2) {
      // ok, let's create them now !
      this.createSourceBuffers(pendingTracks);
      this.pendingTracks = {};
      // append any pending segments now !
      var buffers = this.getSourceBufferTypes();
      if (buffers.length === 0) {
        this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, {
          type: _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorTypes.MEDIA_ERROR,
          details: _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorDetails.BUFFER_INCOMPATIBLE_CODECS_ERROR,
          fatal: true,
          reason: 'could not create source buffer for media codec(s)'
        });
        return;
      }
      buffers.forEach(function (type) {
        operationQueue.executeNext(type);
      });
    }
  };
  _proto.createSourceBuffers = function createSourceBuffers(tracks) {
    var sourceBuffer = this.sourceBuffer,
      mediaSource = this.mediaSource;
    if (!mediaSource) {
      throw Error('createSourceBuffers called when mediaSource was null');
    }
    var tracksCreated = 0;
    for (var trackName in tracks) {
      if (!sourceBuffer[trackName]) {
        var track = tracks[trackName];
        if (!track) {
          throw Error("source buffer exists for track " + trackName + ", however track does not");
        }
        // use levelCodec as first priority
        var codec = track.levelCodec || track.codec;
        var mimeType = track.container + ";codecs=" + codec;
        _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log("[buffer-controller]: creating sourceBuffer(" + mimeType + ")");
        try {
          var sb = sourceBuffer[trackName] = mediaSource.addSourceBuffer(mimeType);
          var sbName = trackName;
          this.addBufferListener(sbName, 'updatestart', this._onSBUpdateStart);
          this.addBufferListener(sbName, 'updateend', this._onSBUpdateEnd);
          this.addBufferListener(sbName, 'error', this._onSBUpdateError);
          this.tracks[trackName] = {
            buffer: sb,
            codec: codec,
            container: track.container,
            levelCodec: track.levelCodec,
            metadata: track.metadata,
            id: track.id
          };
          tracksCreated++;
        } catch (err) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.error("[buffer-controller]: error while trying to add sourceBuffer: " + err.message);
          this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, {
            type: _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorTypes.MEDIA_ERROR,
            details: _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorDetails.BUFFER_ADD_CODEC_ERROR,
            fatal: false,
            error: err,
            mimeType: mimeType
          });
        }
      }
    }
    if (tracksCreated) {
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_CREATED, {
        tracks: this.tracks
      });
    }
  }

  // Keep as arrow functions so that we can directly reference these functions directly as event listeners
  ;
  _proto._onSBUpdateStart = function _onSBUpdateStart(type) {
    var operationQueue = this.operationQueue;
    var operation = operationQueue.current(type);
    operation.onStart();
  };
  _proto._onSBUpdateEnd = function _onSBUpdateEnd(type) {
    var operationQueue = this.operationQueue;
    var operation = operationQueue.current(type);
    operation.onComplete();
    operationQueue.shiftAndExecuteNext(type);
  };
  _proto._onSBUpdateError = function _onSBUpdateError(type, event) {
    _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.error("[buffer-controller]: " + type + " SourceBuffer error", event);
    // according to http://www.w3.org/TR/media-source/#sourcebuffer-append-error
    // SourceBuffer errors are not necessarily fatal; if so, the HTMLMediaElement will fire an error event
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, {
      type: _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorTypes.MEDIA_ERROR,
      details: _errors__WEBPACK_IMPORTED_MODULE_3__.ErrorDetails.BUFFER_APPENDING_ERROR,
      fatal: false
    });
    // updateend is always fired after error, so we'll allow that to shift the current operation off of the queue
    var operation = this.operationQueue.current(type);
    if (operation) {
      operation.onError(event);
    }
  }

  // This method must result in an updateend event; if remove is not called, _onSBUpdateEnd must be called manually
  ;
  _proto.removeExecutor = function removeExecutor(type, startOffset, endOffset) {
    var media = this.media,
      mediaSource = this.mediaSource,
      operationQueue = this.operationQueue,
      sourceBuffer = this.sourceBuffer;
    var sb = sourceBuffer[type];
    if (!media || !mediaSource || !sb) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn("[buffer-controller]: Attempting to remove from the " + type + " SourceBuffer, but it does not exist");
      operationQueue.shiftAndExecuteNext(type);
      return;
    }
    var mediaDuration = (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(media.duration) ? media.duration : Infinity;
    var msDuration = (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(mediaSource.duration) ? mediaSource.duration : Infinity;
    var removeStart = Math.max(0, startOffset);
    var removeEnd = Math.min(endOffset, mediaDuration, msDuration);
    if (removeEnd > removeStart && !sb.ending) {
      sb.ended = false;
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log("[buffer-controller]: Removing [" + removeStart + "," + removeEnd + "] from the " + type + " SourceBuffer");
      console.assert(!sb.updating, type + " sourceBuffer must not be updating");
      sb.remove(removeStart, removeEnd);
    } else {
      // Cycle the queue
      operationQueue.shiftAndExecuteNext(type);
    }
  }

  // This method must result in an updateend event; if append is not called, _onSBUpdateEnd must be called manually
  ;
  _proto.appendExecutor = function appendExecutor(data, type) {
    var operationQueue = this.operationQueue,
      sourceBuffer = this.sourceBuffer;
    var sb = sourceBuffer[type];
    if (!sb) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn("[buffer-controller]: Attempting to append to the " + type + " SourceBuffer, but it does not exist");
      operationQueue.shiftAndExecuteNext(type);
      return;
    }
    sb.ended = false;
    console.assert(!sb.updating, type + " sourceBuffer must not be updating");
    sb.appendBuffer(data);
  }

  // Enqueues an operation to each SourceBuffer queue which, upon execution, resolves a promise. When all promises
  // resolve, the onUnblocked function is executed. Functions calling this method do not need to unblock the queue
  // upon completion, since we already do it here
  ;
  _proto.blockBuffers = function blockBuffers(onUnblocked, buffers) {
    var _this9 = this;
    if (buffers === void 0) {
      buffers = this.getSourceBufferTypes();
    }
    if (!buffers.length) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log('[buffer-controller]: Blocking operation requested, but no SourceBuffers exist');
      Promise.resolve().then(onUnblocked);
      return;
    }
    var operationQueue = this.operationQueue;

    // logger.debug(`[buffer-controller]: Blocking ${buffers} SourceBuffer`);
    var blockingOperations = buffers.map(function (type) {
      return operationQueue.appendBlocker(type);
    });
    Promise.all(blockingOperations).then(function () {
      // logger.debug(`[buffer-controller]: Blocking operation resolved; unblocking ${buffers} SourceBuffer`);
      onUnblocked();
      buffers.forEach(function (type) {
        var sb = _this9.sourceBuffer[type];
        // Only cycle the queue if the SB is not updating. There's a bug in Chrome which sets the SB updating flag to
        // true when changing the MediaSource duration (https://bugs.chromium.org/p/chromium/issues/detail?id=959359&can=2&q=mediasource%20duration)
        // While this is a workaround, it's probably useful to have around
        if (!sb || !sb.updating) {
          operationQueue.shiftAndExecuteNext(type);
        }
      });
    });
  };
  _proto.getSourceBufferTypes = function getSourceBufferTypes() {
    return Object.keys(this.sourceBuffer);
  };
  _proto.addBufferListener = function addBufferListener(type, event, fn) {
    var buffer = this.sourceBuffer[type];
    if (!buffer) {
      return;
    }
    var listener = fn.bind(this, type);
    this.listeners[type].push({
      event: event,
      listener: listener
    });
    buffer.addEventListener(event, listener);
  };
  _proto.removeBufferListeners = function removeBufferListeners(type) {
    var buffer = this.sourceBuffer[type];
    if (!buffer) {
      return;
    }
    this.listeners[type].forEach(function (l) {
      buffer.removeEventListener(l.event, l.listener);
    });
  };
  return BufferController;
}();


/***/ }),

/***/ "./src/controller/buffer-operation-queue.ts":
/*!**************************************************!*\
  !*** ./src/controller/buffer-operation-queue.ts ***!
  \**************************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ BufferOperationQueue)
/* harmony export */ });
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");

var BufferOperationQueue = /*#__PURE__*/function () {
  function BufferOperationQueue(sourceBufferReference) {
    this.buffers = void 0;
    this.queues = {
      video: [],
      audio: [],
      audiovideo: []
    };
    this.buffers = sourceBufferReference;
  }
  var _proto = BufferOperationQueue.prototype;
  _proto.append = function append(operation, type) {
    var queue = this.queues[type];
    queue.push(operation);
    if (queue.length === 1 && this.buffers[type]) {
      this.executeNext(type);
    }
  };
  _proto.insertAbort = function insertAbort(operation, type) {
    var queue = this.queues[type];
    queue.unshift(operation);
    this.executeNext(type);
  };
  _proto.appendBlocker = function appendBlocker(type) {
    var execute;
    var promise = new Promise(function (resolve) {
      execute = resolve;
    });
    var operation = {
      execute: execute,
      onStart: function onStart() {},
      onComplete: function onComplete() {},
      onError: function onError() {}
    };
    this.append(operation, type);
    return promise;
  };
  _proto.executeNext = function executeNext(type) {
    var buffers = this.buffers,
      queues = this.queues;
    var sb = buffers[type];
    var queue = queues[type];
    if (queue.length) {
      var operation = queue[0];
      try {
        // Operations are expected to result in an 'updateend' event being fired. If not, the queue will lock. Operations
        // which do not end with this event must call _onSBUpdateEnd manually
        operation.execute();
      } catch (e) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_0__.logger.warn('[buffer-operation-queue]: Unhandled exception executing the current operation');
        operation.onError(e);

        // Only shift the current operation off, otherwise the updateend handler will do this for us
        if (!sb || !sb.updating) {
          queue.shift();
          this.executeNext(type);
        }
      }
    }
  };
  _proto.shiftAndExecuteNext = function shiftAndExecuteNext(type) {
    this.queues[type].shift();
    this.executeNext(type);
  };
  _proto.current = function current(type) {
    return this.queues[type][0];
  };
  return BufferOperationQueue;
}();


/***/ }),

/***/ "./src/controller/cap-level-controller.ts":
/*!************************************************!*\
  !*** ./src/controller/cap-level-controller.ts ***!
  \************************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../events */ "./src/events.ts");
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
/*
 * cap stream level to media size dimension controller
 */


var CapLevelController = /*#__PURE__*/function () {
  function CapLevelController(hls) {
    this.autoLevelCapping = void 0;
    this.firstLevel = void 0;
    this.media = void 0;
    this.restrictedLevels = void 0;
    this.timer = void 0;
    this.hls = void 0;
    this.streamController = void 0;
    this.clientRect = void 0;
    this.hls = hls;
    this.autoLevelCapping = Number.POSITIVE_INFINITY;
    this.firstLevel = -1;
    this.media = null;
    this.restrictedLevels = [];
    this.timer = undefined;
    this.clientRect = null;
    this.registerListeners();
  }
  var _proto = CapLevelController.prototype;
  _proto.setStreamController = function setStreamController(streamController) {
    this.streamController = streamController;
  };
  _proto.destroy = function destroy() {
    this.unregisterListener();
    if (this.hls.config.capLevelToPlayerSize) {
      this.stopCapping();
    }
    this.media = null;
    this.clientRect = null;
    // @ts-ignore
    this.hls = this.streamController = null;
  };
  _proto.registerListeners = function registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.FPS_DROP_LEVEL_CAPPING, this.onFpsDropLevelCapping, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_PARSED, this.onManifestParsed, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.BUFFER_CODECS, this.onBufferCodecs, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
  };
  _proto.unregisterListener = function unregisterListener() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.FPS_DROP_LEVEL_CAPPING, this.onFpsDropLevelCapping, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_PARSED, this.onManifestParsed, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.BUFFER_CODECS, this.onBufferCodecs, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
  };
  _proto.onFpsDropLevelCapping = function onFpsDropLevelCapping(event, data) {
    // Don't add a restricted level more than once
    if (CapLevelController.isLevelAllowed(data.droppedLevel, this.restrictedLevels)) {
      this.restrictedLevels.push(data.droppedLevel);
    }
  };
  _proto.onMediaAttaching = function onMediaAttaching(event, data) {
    this.media = data.media instanceof HTMLVideoElement ? data.media : null;
    this.clientRect = null;
  };
  _proto.onManifestParsed = function onManifestParsed(event, data) {
    var hls = this.hls;
    this.restrictedLevels = [];
    this.firstLevel = data.firstLevel;
    if (hls.config.capLevelToPlayerSize && data.video) {
      // Start capping immediately if the manifest has signaled video codecs
      this.startCapping();
    }
  }

  // Only activate capping when playing a video stream; otherwise, multi-bitrate audio-only streams will be restricted
  // to the first level
  ;
  _proto.onBufferCodecs = function onBufferCodecs(event, data) {
    var hls = this.hls;
    if (hls.config.capLevelToPlayerSize && data.video) {
      // If the manifest did not signal a video codec capping has been deferred until we're certain video is present
      this.startCapping();
    }
  };
  _proto.onMediaDetaching = function onMediaDetaching() {
    this.stopCapping();
  };
  _proto.detectPlayerSize = function detectPlayerSize() {
    if (this.media && this.mediaHeight > 0 && this.mediaWidth > 0) {
      var levels = this.hls.levels;
      if (levels.length) {
        var hls = this.hls;
        hls.autoLevelCapping = this.getMaxLevel(levels.length - 1);
        if (hls.autoLevelCapping > this.autoLevelCapping && this.streamController) {
          // if auto level capping has a higher value for the previous one, flush the buffer using nextLevelSwitch
          // usually happen when the user go to the fullscreen mode.
          this.streamController.nextLevelSwitch();
        }
        this.autoLevelCapping = hls.autoLevelCapping;
      }
    }
  }

  /*
   * returns level should be the one with the dimensions equal or greater than the media (player) dimensions (so the video will be downscaled)
   */;
  _proto.getMaxLevel = function getMaxLevel(capLevelIndex) {
    var _this = this;
    var levels = this.hls.levels;
    if (!levels.length) {
      return -1;
    }
    var validLevels = levels.filter(function (level, index) {
      return CapLevelController.isLevelAllowed(index, _this.restrictedLevels) && index <= capLevelIndex;
    });
    this.clientRect = null;
    return CapLevelController.getMaxLevelByMediaSize(validLevels, this.mediaWidth, this.mediaHeight);
  };
  _proto.startCapping = function startCapping() {
    if (this.timer) {
      // Don't reset capping if started twice; this can happen if the manifest signals a video codec
      return;
    }
    this.autoLevelCapping = Number.POSITIVE_INFINITY;
    this.hls.firstLevel = this.getMaxLevel(this.firstLevel);
    self.clearInterval(this.timer);
    this.timer = self.setInterval(this.detectPlayerSize.bind(this), 1000);
    this.detectPlayerSize();
  };
  _proto.stopCapping = function stopCapping() {
    this.restrictedLevels = [];
    this.firstLevel = -1;
    this.autoLevelCapping = Number.POSITIVE_INFINITY;
    if (this.timer) {
      self.clearInterval(this.timer);
      this.timer = undefined;
    }
  };
  _proto.getDimensions = function getDimensions() {
    if (this.clientRect) {
      return this.clientRect;
    }
    var media = this.media;
    var boundsRect = {
      width: 0,
      height: 0
    };
    if (media) {
      var clientRect = media.getBoundingClientRect();
      boundsRect.width = clientRect.width;
      boundsRect.height = clientRect.height;
      if (!boundsRect.width && !boundsRect.height) {
        // When the media element has no width or height (equivalent to not being in the DOM),
        // then use its width and height attributes (media.width, media.height)
        boundsRect.width = clientRect.right - clientRect.left || media.width || 0;
        boundsRect.height = clientRect.bottom - clientRect.top || media.height || 0;
      }
    }
    this.clientRect = boundsRect;
    return boundsRect;
  };
  CapLevelController.isLevelAllowed = function isLevelAllowed(level, restrictedLevels) {
    if (restrictedLevels === void 0) {
      restrictedLevels = [];
    }
    return restrictedLevels.indexOf(level) === -1;
  };
  CapLevelController.getMaxLevelByMediaSize = function getMaxLevelByMediaSize(levels, width, height) {
    if (!levels || !levels.length) {
      return -1;
    }

    // Levels can have the same dimensions but differing bandwidths - since levels are ordered, we can look to the next
    // to determine whether we've chosen the greatest bandwidth for the media's dimensions
    var atGreatestBandwidth = function atGreatestBandwidth(curLevel, nextLevel) {
      if (!nextLevel) {
        return true;
      }
      return curLevel.width !== nextLevel.width || curLevel.height !== nextLevel.height;
    };

    // If we run through the loop without breaking, the media's dimensions are greater than every level, so default to
    // the max level
    var maxLevelIndex = levels.length - 1;
    for (var i = 0; i < levels.length; i += 1) {
      var level = levels[i];
      if ((level.width >= width || level.height >= height) && atGreatestBandwidth(level, levels[i + 1])) {
        maxLevelIndex = i;
        break;
      }
    }
    return maxLevelIndex;
  };
  _createClass(CapLevelController, [{
    key: "mediaWidth",
    get: function get() {
      return this.getDimensions().width * this.contentScaleFactor;
    }
  }, {
    key: "mediaHeight",
    get: function get() {
      return this.getDimensions().height * this.contentScaleFactor;
    }
  }, {
    key: "contentScaleFactor",
    get: function get() {
      var pixelRatio = 1;
      if (!this.hls.config.ignoreDevicePixelRatio) {
        try {
          pixelRatio = self.devicePixelRatio;
        } catch (e) {
          /* no-op */
        }
      }
      return pixelRatio;
    }
  }]);
  return CapLevelController;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (CapLevelController);

/***/ }),

/***/ "./src/controller/cmcd-controller.ts":
/*!*******************************************!*\
  !*** ./src/controller/cmcd-controller.ts ***!
  \*******************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ CMCDController)
/* harmony export */ });
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _types_cmcd__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../types/cmcd */ "./src/types/cmcd.ts");
/* harmony import */ var _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/buffer-helper */ "./src/utils/buffer-helper.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
function _createForOfIteratorHelperLoose(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (it) return (it = it.call(o)).next.bind(it); if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; return function () { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }





/**
 * Controller to deal with Common Media Client Data (CMCD)
 * @see https://cdn.cta.tech/cta/media/media/resources/standards/pdfs/cta-5004-final.pdf
 */
var CMCDController = /*#__PURE__*/function () {
  // eslint-disable-line no-restricted-globals
  // eslint-disable-line no-restricted-globals

  function CMCDController(hls) {
    var _this = this;
    this.hls = void 0;
    this.config = void 0;
    this.media = void 0;
    this.sid = void 0;
    this.cid = void 0;
    this.useHeaders = false;
    this.initialized = false;
    this.starved = false;
    this.buffering = true;
    this.audioBuffer = void 0;
    this.videoBuffer = void 0;
    this.onWaiting = function () {
      if (_this.initialized) {
        _this.starved = true;
      }
      _this.buffering = true;
    };
    this.onPlaying = function () {
      if (!_this.initialized) {
        _this.initialized = true;
      }
      _this.buffering = false;
    };
    this.applyPlaylistData = function (context) {
      try {
        _this.apply(context, {
          ot: _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.MANIFEST,
          su: !_this.initialized
        });
      } catch (error) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn('Could not generate manifest CMCD data.', error);
      }
    };
    this.applyFragmentData = function (context) {
      try {
        var fragment = context.frag;
        var level = _this.hls.levels[fragment.level];
        var ot = _this.getObjectType(fragment);
        var data = {
          d: fragment.duration * 1000,
          ot: ot
        };
        if (ot === _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.VIDEO || ot === _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.AUDIO || ot == _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.MUXED) {
          data.br = level.bitrate / 1000;
          data.tb = _this.getTopBandwidth(ot) / 1000;
          data.bl = _this.getBufferLength(ot);
        }
        _this.apply(context, data);
      } catch (error) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn('Could not generate segment CMCD data.', error);
      }
    };
    this.hls = hls;
    var config = this.config = hls.config;
    var cmcd = config.cmcd;
    if (cmcd != null) {
      config.pLoader = this.createPlaylistLoader();
      config.fLoader = this.createFragmentLoader();
      this.sid = cmcd.sessionId || CMCDController.uuid();
      this.cid = cmcd.contentId;
      this.useHeaders = cmcd.useHeaders === true;
      this.registerListeners();
    }
  }
  var _proto = CMCDController.prototype;
  _proto.registerListeners = function registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_DETACHED, this.onMediaDetached, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.BUFFER_CREATED, this.onBufferCreated, this);
  };
  _proto.unregisterListeners = function unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_DETACHED, this.onMediaDetached, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.BUFFER_CREATED, this.onBufferCreated, this);
    this.onMediaDetached();
  };
  _proto.destroy = function destroy() {
    this.unregisterListeners();

    // @ts-ignore
    this.hls = this.config = this.audioBuffer = this.videoBuffer = null;
  };
  _proto.onMediaAttached = function onMediaAttached(event, data) {
    this.media = data.media;
    this.media.addEventListener('waiting', this.onWaiting);
    this.media.addEventListener('playing', this.onPlaying);
  };
  _proto.onMediaDetached = function onMediaDetached() {
    if (!this.media) {
      return;
    }
    this.media.removeEventListener('waiting', this.onWaiting);
    this.media.removeEventListener('playing', this.onPlaying);

    // @ts-ignore
    this.media = null;
  };
  _proto.onBufferCreated = function onBufferCreated(event, data) {
    var _data$tracks$audio, _data$tracks$video;
    this.audioBuffer = (_data$tracks$audio = data.tracks.audio) === null || _data$tracks$audio === void 0 ? void 0 : _data$tracks$audio.buffer;
    this.videoBuffer = (_data$tracks$video = data.tracks.video) === null || _data$tracks$video === void 0 ? void 0 : _data$tracks$video.buffer;
  };
  /**
   * Create baseline CMCD data
   */
  _proto.createData = function createData() {
    var _this$media;
    return {
      v: _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDVersion,
      sf: _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDStreamingFormat.HLS,
      sid: this.sid,
      cid: this.cid,
      pr: (_this$media = this.media) === null || _this$media === void 0 ? void 0 : _this$media.playbackRate,
      mtp: this.hls.bandwidthEstimate / 1000
    };
  }

  /**
   * Apply CMCD data to a request.
   */;
  _proto.apply = function apply(context, data) {
    if (data === void 0) {
      data = {};
    }
    // apply baseline data
    _extends(data, this.createData());
    var isVideo = data.ot === _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.INIT || data.ot === _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.VIDEO || data.ot === _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.MUXED;
    if (this.starved && isVideo) {
      data.bs = true;
      data.su = true;
      this.starved = false;
    }
    if (data.su == null) {
      data.su = this.buffering;
    }

    // TODO: Implement rtp, nrr, nor, dl

    if (this.useHeaders) {
      var headers = CMCDController.toHeaders(data);
      if (!Object.keys(headers).length) {
        return;
      }
      if (!context.headers) {
        context.headers = {};
      }
      _extends(context.headers, headers);
    } else {
      var query = CMCDController.toQuery(data);
      if (!query) {
        return;
      }
      context.url = CMCDController.appendQueryToUri(context.url, query);
    }
  }

  /**
   * Apply CMCD data to a manifest request.
   */;
  /**
   * The CMCD object type.
   */
  _proto.getObjectType = function getObjectType(fragment) {
    var type = fragment.type;
    if (type === 'subtitle') {
      return _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.TIMED_TEXT;
    }
    if (fragment.sn === 'initSegment') {
      return _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.INIT;
    }
    if (type === 'audio') {
      return _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.AUDIO;
    }
    if (type === 'main') {
      if (!this.hls.audioTracks.length) {
        return _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.MUXED;
      }
      return _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.VIDEO;
    }
    return undefined;
  }

  /**
   * Get the highest bitrate.
   */;
  _proto.getTopBandwidth = function getTopBandwidth(type) {
    var bitrate = 0;
    var levels;
    var hls = this.hls;
    if (type === _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.AUDIO) {
      levels = hls.audioTracks;
    } else {
      var max = hls.maxAutoLevel;
      var len = max > -1 ? max + 1 : hls.levels.length;
      levels = hls.levels.slice(0, len);
    }
    for (var _iterator = _createForOfIteratorHelperLoose(levels), _step; !(_step = _iterator()).done;) {
      var level = _step.value;
      if (level.bitrate > bitrate) {
        bitrate = level.bitrate;
      }
    }
    return bitrate > 0 ? bitrate : NaN;
  }

  /**
   * Get the buffer length for a media type in milliseconds
   */;
  _proto.getBufferLength = function getBufferLength(type) {
    var media = this.hls.media;
    var buffer = type === _types_cmcd__WEBPACK_IMPORTED_MODULE_1__.CMCDObjectType.AUDIO ? this.audioBuffer : this.videoBuffer;
    if (!buffer || !media) {
      return NaN;
    }
    var info = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_2__.BufferHelper.bufferInfo(buffer, media.currentTime, this.config.maxBufferHole);
    return info.len * 1000;
  }

  /**
   * Create a playlist loader
   */;
  _proto.createPlaylistLoader = function createPlaylistLoader() {
    var pLoader = this.config.pLoader;
    var apply = this.applyPlaylistData;
    var Ctor = pLoader || this.config.loader;
    return /*#__PURE__*/function () {
      function CmcdPlaylistLoader(config) {
        this.loader = void 0;
        this.loader = new Ctor(config);
      }
      var _proto2 = CmcdPlaylistLoader.prototype;
      _proto2.destroy = function destroy() {
        this.loader.destroy();
      };
      _proto2.abort = function abort() {
        this.loader.abort();
      };
      _proto2.load = function load(context, config, callbacks) {
        apply(context);
        this.loader.load(context, config, callbacks);
      };
      _createClass(CmcdPlaylistLoader, [{
        key: "stats",
        get: function get() {
          return this.loader.stats;
        }
      }, {
        key: "context",
        get: function get() {
          return this.loader.context;
        }
      }]);
      return CmcdPlaylistLoader;
    }();
  }

  /**
   * Create a playlist loader
   */;
  _proto.createFragmentLoader = function createFragmentLoader() {
    var fLoader = this.config.fLoader;
    var apply = this.applyFragmentData;
    var Ctor = fLoader || this.config.loader;
    return /*#__PURE__*/function () {
      function CmcdFragmentLoader(config) {
        this.loader = void 0;
        this.loader = new Ctor(config);
      }
      var _proto3 = CmcdFragmentLoader.prototype;
      _proto3.destroy = function destroy() {
        this.loader.destroy();
      };
      _proto3.abort = function abort() {
        this.loader.abort();
      };
      _proto3.load = function load(context, config, callbacks) {
        apply(context);
        this.loader.load(context, config, callbacks);
      };
      _createClass(CmcdFragmentLoader, [{
        key: "stats",
        get: function get() {
          return this.loader.stats;
        }
      }, {
        key: "context",
        get: function get() {
          return this.loader.context;
        }
      }]);
      return CmcdFragmentLoader;
    }();
  }

  /**
   * Generate a random v4 UUI
   *
   * @returns {string}
   */;
  CMCDController.uuid = function uuid() {
    var url = URL.createObjectURL(new Blob());
    var uuid = url.toString();
    URL.revokeObjectURL(url);
    return uuid.slice(uuid.lastIndexOf('/') + 1);
  }

  /**
   * Serialize a CMCD data object according to the rules defined in the
   * section 3.2 of
   * [CTA-5004](https://cdn.cta.tech/cta/media/media/resources/standards/pdfs/cta-5004-final.pdf).
   */;
  CMCDController.serialize = function serialize(data) {
    var results = [];
    var isValid = function isValid(value) {
      return !Number.isNaN(value) && value != null && value !== '' && value !== false;
    };
    var toRounded = function toRounded(value) {
      return Math.round(value);
    };
    var toHundred = function toHundred(value) {
      return toRounded(value / 100) * 100;
    };
    var toUrlSafe = function toUrlSafe(value) {
      return encodeURIComponent(value);
    };
    var formatters = {
      br: toRounded,
      d: toRounded,
      bl: toHundred,
      dl: toHundred,
      mtp: toHundred,
      nor: toUrlSafe,
      rtp: toHundred,
      tb: toRounded
    };
    var keys = Object.keys(data || {}).sort();
    for (var _iterator2 = _createForOfIteratorHelperLoose(keys), _step2; !(_step2 = _iterator2()).done;) {
      var key = _step2.value;
      var value = data[key];

      // ignore invalid values
      if (!isValid(value)) {
        continue;
      }

      // Version should only be reported if not equal to 1.
      if (key === 'v' && value === 1) {
        continue;
      }

      // Playback rate should only be sent if not equal to 1.
      if (key == 'pr' && value === 1) {
        continue;
      }

      // Certain values require special formatting
      var formatter = formatters[key];
      if (formatter) {
        value = formatter(value);
      }

      // Serialize the key/value pair
      var type = typeof value;
      var result = void 0;
      if (key === 'ot' || key === 'sf' || key === 'st') {
        result = key + "=" + value;
      } else if (type === 'boolean') {
        result = key;
      } else if (type === 'number') {
        result = key + "=" + value;
      } else {
        result = key + "=" + JSON.stringify(value);
      }
      results.push(result);
    }
    return results.join(',');
  }

  /**
   * Convert a CMCD data object to request headers according to the rules
   * defined in the section 2.1 and 3.2 of
   * [CTA-5004](https://cdn.cta.tech/cta/media/media/resources/standards/pdfs/cta-5004-final.pdf).
   */;
  CMCDController.toHeaders = function toHeaders(data) {
    var keys = Object.keys(data);
    var headers = {};
    var headerNames = ['Object', 'Request', 'Session', 'Status'];
    var headerGroups = [{}, {}, {}, {}];
    var headerMap = {
      br: 0,
      d: 0,
      ot: 0,
      tb: 0,
      bl: 1,
      dl: 1,
      mtp: 1,
      nor: 1,
      nrr: 1,
      su: 1,
      cid: 2,
      pr: 2,
      sf: 2,
      sid: 2,
      st: 2,
      v: 2,
      bs: 3,
      rtp: 3
    };
    for (var _i = 0, _keys = keys; _i < _keys.length; _i++) {
      var key = _keys[_i];
      // Unmapped fields are mapped to the Request header
      var index = headerMap[key] != null ? headerMap[key] : 1;
      headerGroups[index][key] = data[key];
    }
    for (var i = 0; i < headerGroups.length; i++) {
      var value = CMCDController.serialize(headerGroups[i]);
      if (value) {
        headers["CMCD-" + headerNames[i]] = value;
      }
    }
    return headers;
  }

  /**
   * Convert a CMCD data object to query args according to the rules
   * defined in the section 2.2 and 3.2 of
   * [CTA-5004](https://cdn.cta.tech/cta/media/media/resources/standards/pdfs/cta-5004-final.pdf).
   */;
  CMCDController.toQuery = function toQuery(data) {
    return "CMCD=" + encodeURIComponent(CMCDController.serialize(data));
  }

  /**
   * Append query args to a uri.
   */;
  CMCDController.appendQueryToUri = function appendQueryToUri(uri, query) {
    if (!query) {
      return uri;
    }
    var separator = uri.includes('?') ? '&' : '?';
    return "" + uri + separator + query;
  };
  return CMCDController;
}();


/***/ }),

/***/ "./src/controller/eme-controller.ts":
/*!******************************************!*\
  !*** ./src/controller/eme-controller.ts ***!
  \******************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/mediakeys-helper */ "./src/utils/mediakeys-helper.ts");
/* harmony import */ var _utils_keysystem_util__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../utils/keysystem-util */ "./src/utils/keysystem-util.ts");
/* harmony import */ var _utils_numeric_encoding_utils__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../utils/numeric-encoding-utils */ "./src/utils/numeric-encoding-utils.ts");
/* harmony import */ var _loader_level_key__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../loader/level-key */ "./src/loader/level-key.ts");
/* harmony import */ var _utils_hex__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ../utils/hex */ "./src/utils/hex.ts");
/* harmony import */ var _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_8__ = __webpack_require__(/*! ../utils/mp4-tools */ "./src/utils/mp4-tools.ts");
/* harmony import */ var eventemitter3__WEBPACK_IMPORTED_MODULE_9__ = __webpack_require__(/*! eventemitter3 */ "./node_modules/eventemitter3/index.js");
/* harmony import */ var eventemitter3__WEBPACK_IMPORTED_MODULE_9___default = /*#__PURE__*/__webpack_require__.n(eventemitter3__WEBPACK_IMPORTED_MODULE_9__);
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _wrapNativeSuper(Class) { var _cache = typeof Map === "function" ? new Map() : undefined; _wrapNativeSuper = function _wrapNativeSuper(Class) { if (Class === null || !_isNativeFunction(Class)) return Class; if (typeof Class !== "function") { throw new TypeError("Super expression must either be null or a function"); } if (typeof _cache !== "undefined") { if (_cache.has(Class)) return _cache.get(Class); _cache.set(Class, Wrapper); } function Wrapper() { return _construct(Class, arguments, _getPrototypeOf(this).constructor); } Wrapper.prototype = Object.create(Class.prototype, { constructor: { value: Wrapper, enumerable: false, writable: true, configurable: true } }); return _setPrototypeOf(Wrapper, Class); }; return _wrapNativeSuper(Class); }
function _construct(Parent, args, Class) { if (_isNativeReflectConstruct()) { _construct = Reflect.construct.bind(); } else { _construct = function _construct(Parent, args, Class) { var a = [null]; a.push.apply(a, args); var Constructor = Function.bind.apply(Parent, a); var instance = new Constructor(); if (Class) _setPrototypeOf(instance, Class.prototype); return instance; }; } return _construct.apply(null, arguments); }
function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
function _isNativeFunction(fn) { return Function.toString.call(fn).indexOf("[native code]") !== -1; }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
/**
 * @author Stephan Hesse <disparat@gmail.com> | <tchakabam@gmail.com>
 *
 * DRM support for Hls.js
 */











var MAX_LICENSE_REQUEST_FAILURES = 3;
var LOGGER_PREFIX = '[eme]';
/**
 * Controller to deal with encrypted media extensions (EME)
 * @see https://developer.mozilla.org/en-US/docs/Web/API/Encrypted_Media_Extensions_API
 *
 * @class
 * @constructor
 */
var EMEController = /*#__PURE__*/function () {
  function EMEController(hls) {
    this.hls = void 0;
    this.config = void 0;
    this.media = null;
    this.keyFormatPromise = null;
    this.keySystemAccessPromises = {};
    this._requestLicenseFailureCount = 0;
    this.mediaKeySessions = [];
    this.keyIdToKeySessionPromise = {};
    this.setMediaKeysQueue = EMEController.CDMCleanupPromise ? [EMEController.CDMCleanupPromise] : [];
    this.onMediaEncrypted = this._onMediaEncrypted.bind(this);
    this.onWaitingForKey = this._onWaitingForKey.bind(this);
    this.debug = _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.debug.bind(_utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger, LOGGER_PREFIX);
    this.log = _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log.bind(_utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger, LOGGER_PREFIX);
    this.warn = _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn.bind(_utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger, LOGGER_PREFIX);
    this.error = _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.error.bind(_utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger, LOGGER_PREFIX);
    this.hls = hls;
    this.config = hls.config;
    this.registerListeners();
  }
  var _proto = EMEController.prototype;
  _proto.destroy = function destroy() {
    this.unregisterListeners();
    this.onMediaDetached();
    // @ts-ignore
    this.hls = this.onMediaEncrypted = this.onWaitingForKey = this.keyIdToKeySessionPromise = null;
  };
  _proto.registerListeners = function registerListeners() {
    this.hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    this.hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_DETACHED, this.onMediaDetached, this);
    this.hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_LOADED, this.onManifestLoaded, this);
  };
  _proto.unregisterListeners = function unregisterListeners() {
    this.hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    this.hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_DETACHED, this.onMediaDetached, this);
    this.hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_LOADED, this.onManifestLoaded, this);
  };
  _proto.getLicenseServerUrl = function getLicenseServerUrl(keySystem) {
    var _this$config = this.config,
      drmSystems = _this$config.drmSystems,
      widevineLicenseUrl = _this$config.widevineLicenseUrl;
    var keySystemConfiguration = drmSystems[keySystem];
    if (keySystemConfiguration) {
      return keySystemConfiguration.licenseUrl;
    }

    // For backward compatibility
    if (keySystem === _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.KeySystems.WIDEVINE && widevineLicenseUrl) {
      return widevineLicenseUrl;
    }
    throw new Error("no license server URL configured for key-system \"" + keySystem + "\"");
  };
  _proto.getServerCertificateUrl = function getServerCertificateUrl(keySystem) {
    var drmSystems = this.config.drmSystems;
    var keySystemConfiguration = drmSystems[keySystem];
    if (keySystemConfiguration) {
      return keySystemConfiguration.serverCertificateUrl;
    } else {
      this.log("No Server Certificate in config.drmSystems[\"" + keySystem + "\"]");
    }
  };
  _proto.attemptKeySystemAccess = function attemptKeySystemAccess(keySystemsToAttempt) {
    var _this = this;
    var levels = this.hls.levels;
    var uniqueCodec = function uniqueCodec(value, i, a) {
      return !!value && a.indexOf(value) === i;
    };
    var audioCodecs = levels.map(function (level) {
      return level.audioCodec;
    }).filter(uniqueCodec);
    var videoCodecs = levels.map(function (level) {
      return level.videoCodec;
    }).filter(uniqueCodec);
    if (audioCodecs.length + videoCodecs.length === 0) {
      videoCodecs.push('avc1.42e01e');
    }
    return new Promise(function (resolve, reject) {
      var attempt = function attempt(keySystems) {
        var keySystem = keySystems.shift();
        _this.getMediaKeysPromise(keySystem, audioCodecs, videoCodecs).then(function (mediaKeys) {
          return resolve({
            keySystem: keySystem,
            mediaKeys: mediaKeys
          });
        }).catch(function (error) {
          if (keySystems.length) {
            attempt(keySystems);
          } else if (error instanceof EMEKeyError) {
            reject(error);
          } else {
            reject(new EMEKeyError({
              type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.KEY_SYSTEM_ERROR,
              details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.KEY_SYSTEM_NO_ACCESS,
              error: error,
              fatal: true
            }, error.message));
          }
        });
      };
      attempt(keySystemsToAttempt);
    });
  };
  _proto.requestMediaKeySystemAccess = function requestMediaKeySystemAccess(keySystem, supportedConfigurations) {
    var requestMediaKeySystemAccessFunc = this.config.requestMediaKeySystemAccessFunc;
    if (!(typeof requestMediaKeySystemAccessFunc === 'function')) {
      var errMessage = "Configured requestMediaKeySystemAccess is not a function " + requestMediaKeySystemAccessFunc;
      if (_utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.requestMediaKeySystemAccess === null && self.location.protocol === 'http:') {
        errMessage = "navigator.requestMediaKeySystemAccess is not available over insecure protocol " + location.protocol;
      }
      return Promise.reject(new Error(errMessage));
    }
    return requestMediaKeySystemAccessFunc(keySystem, supportedConfigurations);
  };
  _proto.getMediaKeysPromise = function getMediaKeysPromise(keySystem, audioCodecs, videoCodecs) {
    var _this2 = this;
    // This can throw, but is caught in event handler callpath
    var mediaKeySystemConfigs = (0,_utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.getSupportedMediaKeySystemConfigurations)(keySystem, audioCodecs, videoCodecs, this.config.drmSystemOptions);
    var keySystemAccessPromises = this.keySystemAccessPromises[keySystem];
    var keySystemAccess = keySystemAccessPromises === null || keySystemAccessPromises === void 0 ? void 0 : keySystemAccessPromises.keySystemAccess;
    if (!keySystemAccess) {
      this.log("Requesting encrypted media \"" + keySystem + "\" key-system access with config: " + JSON.stringify(mediaKeySystemConfigs));
      keySystemAccess = this.requestMediaKeySystemAccess(keySystem, mediaKeySystemConfigs);
      var _keySystemAccessPromises = this.keySystemAccessPromises[keySystem] = {
        keySystemAccess: keySystemAccess
      };
      keySystemAccess.catch(function (error) {
        _this2.log("Failed to obtain access to key-system \"" + keySystem + "\": " + error);
      });
      return keySystemAccess.then(function (mediaKeySystemAccess) {
        _this2.log("Access for key-system \"" + mediaKeySystemAccess.keySystem + "\" obtained");
        var certificateRequest = _this2.fetchServerCertificate(keySystem);
        _this2.log("Create media-keys for \"" + keySystem + "\"");
        _keySystemAccessPromises.mediaKeys = mediaKeySystemAccess.createMediaKeys().then(function (mediaKeys) {
          _this2.log("Media-keys created for \"" + keySystem + "\"");
          return certificateRequest.then(function (certificate) {
            if (certificate) {
              return _this2.setMediaKeysServerCertificate(mediaKeys, keySystem, certificate);
            }
            return mediaKeys;
          });
        });
        _keySystemAccessPromises.mediaKeys.catch(function (error) {
          _this2.error("Failed to create media-keys for \"" + keySystem + "\"}: " + error);
        });
        return _keySystemAccessPromises.mediaKeys;
      });
    }
    return keySystemAccess.then(function () {
      return keySystemAccessPromises.mediaKeys;
    });
  };
  _proto.createMediaKeySessionContext = function createMediaKeySessionContext(_ref) {
    var decryptdata = _ref.decryptdata,
      keySystem = _ref.keySystem,
      mediaKeys = _ref.mediaKeys;
    console.assert(!!mediaKeys, 'mediaKeys is defined');
    this.log("Creating key-system session \"" + keySystem + "\" keyId: " + _utils_hex__WEBPACK_IMPORTED_MODULE_7__["default"].hexDump(decryptdata.keyId || []));
    var mediaKeysSession = mediaKeys.createSession();
    var mediaKeySessionContext = {
      decryptdata: decryptdata,
      keySystem: keySystem,
      mediaKeys: mediaKeys,
      mediaKeysSession: mediaKeysSession,
      keyStatus: 'status-pending'
    };
    this.mediaKeySessions.push(mediaKeySessionContext);
    return mediaKeySessionContext;
  };
  _proto.renewKeySession = function renewKeySession(mediaKeySessionContext) {
    var decryptdata = mediaKeySessionContext.decryptdata;
    if (decryptdata.pssh) {
      var keySessionContext = this.createMediaKeySessionContext(mediaKeySessionContext);
      var _keyId = this.getKeyIdString(decryptdata);
      var scheme = 'cenc';
      this.keyIdToKeySessionPromise[_keyId] = this.generateRequestWithPreferredKeySession(keySessionContext, scheme, decryptdata.pssh, 'expired');
    } else {
      this.warn("Could not renew expired session. Missing pssh initData.");
    }
    this.removeSession(mediaKeySessionContext);
  };
  _proto.getKeyIdString = function getKeyIdString(decryptdata) {
    if (!decryptdata) {
      throw new Error('Could not read keyId of undefined decryptdata');
    }
    if (decryptdata.keyId === null) {
      throw new Error('keyId is null');
    }
    return _utils_hex__WEBPACK_IMPORTED_MODULE_7__["default"].hexDump(decryptdata.keyId);
  };
  _proto.updateKeySession = function updateKeySession(mediaKeySessionContext, data) {
    var _mediaKeySessionConte;
    var keySession = mediaKeySessionContext.mediaKeysSession;
    this.log("Updating key-session \"" + keySession.sessionId + "\" for keyID " + _utils_hex__WEBPACK_IMPORTED_MODULE_7__["default"].hexDump(((_mediaKeySessionConte = mediaKeySessionContext.decryptdata) === null || _mediaKeySessionConte === void 0 ? void 0 : _mediaKeySessionConte.keyId) || []) + "\n      } (data length: " + (data ? data.byteLength : data) + ")");
    return keySession.update(data);
  };
  _proto.selectKeySystemFormat = function selectKeySystemFormat(frag) {
    var keyFormats = Object.keys(frag.levelkeys || {});
    if (!this.keyFormatPromise) {
      this.log("Selecting key-system from fragment (sn: " + frag.sn + " " + frag.type + ": " + frag.level + ") key formats " + keyFormats.join(', '));
      this.keyFormatPromise = this.getKeyFormatPromise(keyFormats);
    }
    return this.keyFormatPromise;
  };
  _proto.getKeyFormatPromise = function getKeyFormatPromise(keyFormats) {
    var _this3 = this;
    return new Promise(function (resolve, reject) {
      var keySystemsInConfig = (0,_utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.getKeySystemsForConfig)(_this3.config);
      var keySystemsToAttempt = keyFormats.map(_utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.keySystemFormatToKeySystemDomain).filter(function (value) {
        return !!value && keySystemsInConfig.indexOf(value) !== -1;
      });
      return _this3.getKeySystemSelectionPromise(keySystemsToAttempt).then(function (_ref2) {
        var keySystem = _ref2.keySystem;
        var keySystemFormat = (0,_utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.keySystemDomainToKeySystemFormat)(keySystem);
        if (keySystemFormat) {
          resolve(keySystemFormat);
        } else {
          reject(new Error("Unable to find format for key-system \"" + keySystem + "\""));
        }
      }).catch(reject);
    });
  };
  _proto.loadKey = function loadKey(data) {
    var _this4 = this;
    var decryptdata = data.keyInfo.decryptdata;
    var keyId = this.getKeyIdString(decryptdata);
    var keyDetails = "(keyId: " + keyId + " format: \"" + decryptdata.keyFormat + "\" method: " + decryptdata.method + " uri: " + decryptdata.uri + ")";
    this.log("Starting session for key " + keyDetails);
    var keySessionContextPromise = this.keyIdToKeySessionPromise[keyId];
    if (!keySessionContextPromise) {
      keySessionContextPromise = this.keyIdToKeySessionPromise[keyId] = this.getKeySystemForKeyPromise(decryptdata).then(function (_ref3) {
        var keySystem = _ref3.keySystem,
          mediaKeys = _ref3.mediaKeys;
        _this4.throwIfDestroyed();
        _this4.log("Handle encrypted media sn: " + data.frag.sn + " " + data.frag.type + ": " + data.frag.level + " using key " + keyDetails);
        return _this4.attemptSetMediaKeys(keySystem, mediaKeys).then(function () {
          _this4.throwIfDestroyed();
          var keySessionContext = _this4.createMediaKeySessionContext({
            keySystem: keySystem,
            mediaKeys: mediaKeys,
            decryptdata: decryptdata
          });
          var scheme = 'cenc';
          return _this4.generateRequestWithPreferredKeySession(keySessionContext, scheme, decryptdata.pssh, 'playlist-key');
        });
      });
      keySessionContextPromise.catch(function (error) {
        return _this4.handleError(error);
      });
    }
    return keySessionContextPromise;
  };
  _proto.throwIfDestroyed = function throwIfDestroyed(message) {
    if (message === void 0) {
      message = 'Invalid state';
    }
    if (!this.hls) {
      throw new Error('invalid state');
    }
  };
  _proto.handleError = function handleError(error) {
    if (!this.hls) {
      return;
    }
    this.error(error.message);
    if (error instanceof EMEKeyError) {
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.ERROR, error.data);
    } else {
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.KEY_SYSTEM_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.KEY_SYSTEM_NO_KEYS,
        error: error,
        fatal: true
      });
    }
  };
  _proto.getKeySystemForKeyPromise = function getKeySystemForKeyPromise(decryptdata) {
    var keyId = this.getKeyIdString(decryptdata);
    var mediaKeySessionContext = this.keyIdToKeySessionPromise[keyId];
    if (!mediaKeySessionContext) {
      var keySystem = (0,_utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.keySystemFormatToKeySystemDomain)(decryptdata.keyFormat);
      var keySystemsToAttempt = keySystem ? [keySystem] : (0,_utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.getKeySystemsForConfig)(this.config);
      return this.attemptKeySystemAccess(keySystemsToAttempt);
    }
    return mediaKeySessionContext;
  };
  _proto.getKeySystemSelectionPromise = function getKeySystemSelectionPromise(keySystemsToAttempt) {
    if (!keySystemsToAttempt.length) {
      keySystemsToAttempt = (0,_utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.getKeySystemsForConfig)(this.config);
    }
    if (keySystemsToAttempt.length === 0) {
      throw new EMEKeyError({
        type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.KEY_SYSTEM_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.KEY_SYSTEM_NO_CONFIGURED_LICENSE,
        fatal: true
      }, "Missing key-system license configuration options " + JSON.stringify({
        drmSystems: this.config.drmSystems
      }));
    }
    return this.attemptKeySystemAccess(keySystemsToAttempt);
  };
  _proto._onMediaEncrypted = function _onMediaEncrypted(event) {
    var _this5 = this;
    var initDataType = event.initDataType,
      initData = event.initData;
    this.debug("\"" + event.type + "\" event: init data type: \"" + initDataType + "\"");

    // Ignore event when initData is null
    if (initData === null) {
      return;
    }
    var keyId;
    var keySystemDomain;
    if (initDataType === 'sinf' && this.config.drmSystems[_utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.KeySystems.FAIRPLAY]) {
      // Match sinf keyId to playlist skd://keyId=
      var json = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_8__.bin2str)(new Uint8Array(initData));
      try {
        var sinf = (0,_utils_numeric_encoding_utils__WEBPACK_IMPORTED_MODULE_5__.base64Decode)(JSON.parse(json).sinf);
        var tenc = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_8__.parseSinf)(new Uint8Array(sinf));
        if (!tenc) {
          return;
        }
        keyId = tenc.subarray(8, 24);
        keySystemDomain = _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.KeySystems.FAIRPLAY;
      } catch (error) {
        this.warn('Failed to parse sinf "encrypted" event message initData');
        return;
      }
    } else {
      // Support clear-lead key-session creation (otherwise depend on playlist keys)
      var psshInfo = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_8__.parsePssh)(initData);
      if (psshInfo === null) {
        return;
      }
      if (psshInfo.version === 0 && psshInfo.systemId === _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.KeySystemIds.WIDEVINE && psshInfo.data) {
        keyId = psshInfo.data.subarray(8, 24);
      }
      keySystemDomain = (0,_utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.keySystemIdToKeySystemDomain)(psshInfo.systemId);
    }
    if (!keySystemDomain || !keyId) {
      return;
    }
    var keyIdHex = _utils_hex__WEBPACK_IMPORTED_MODULE_7__["default"].hexDump(keyId);
    var keyIdToKeySessionPromise = this.keyIdToKeySessionPromise,
      mediaKeySessions = this.mediaKeySessions;
    var keySessionContextPromise = keyIdToKeySessionPromise[keyIdHex];
    var _loop = function _loop(i) {
      // Match playlist key
      var keyContext = mediaKeySessions[i];
      var decryptdata = keyContext.decryptdata;
      if (decryptdata.pssh || !decryptdata.keyId) {
        return "continue";
      }
      var oldKeyIdHex = _utils_hex__WEBPACK_IMPORTED_MODULE_7__["default"].hexDump(decryptdata.keyId);
      if (keyIdHex === oldKeyIdHex || decryptdata.uri.replace(/-/g, '').indexOf(keyIdHex) !== -1) {
        keySessionContextPromise = keyIdToKeySessionPromise[oldKeyIdHex];
        delete keyIdToKeySessionPromise[oldKeyIdHex];
        decryptdata.pssh = new Uint8Array(initData);
        decryptdata.keyId = keyId;
        keySessionContextPromise = keyIdToKeySessionPromise[keyIdHex] = keySessionContextPromise.then(function () {
          return _this5.generateRequestWithPreferredKeySession(keyContext, initDataType, initData, 'encrypted-event-key-match');
        });
        return "break";
      }
    };
    for (var i = 0; i < mediaKeySessions.length; i++) {
      var _ret = _loop(i);
      if (_ret === "continue") continue;
      if (_ret === "break") break;
    }
    if (!keySessionContextPromise) {
      // Clear-lead key (not encountered in playlist)
      keySessionContextPromise = keyIdToKeySessionPromise[keyIdHex] = this.getKeySystemSelectionPromise([keySystemDomain]).then(function (_ref4) {
        var _keySystemToKeySystem;
        var keySystem = _ref4.keySystem,
          mediaKeys = _ref4.mediaKeys;
        _this5.throwIfDestroyed();
        var decryptdata = new _loader_level_key__WEBPACK_IMPORTED_MODULE_6__.LevelKey('ISO-23001-7', keyIdHex, (_keySystemToKeySystem = (0,_utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.keySystemDomainToKeySystemFormat)(keySystem)) != null ? _keySystemToKeySystem : '');
        decryptdata.pssh = new Uint8Array(initData);
        decryptdata.keyId = keyId;
        return _this5.attemptSetMediaKeys(keySystem, mediaKeys).then(function () {
          _this5.throwIfDestroyed();
          var keySessionContext = _this5.createMediaKeySessionContext({
            decryptdata: decryptdata,
            keySystem: keySystem,
            mediaKeys: mediaKeys
          });
          return _this5.generateRequestWithPreferredKeySession(keySessionContext, initDataType, initData, 'encrypted-event-no-match');
        });
      });
    }
    keySessionContextPromise.catch(function (error) {
      return _this5.handleError(error);
    });
  };
  _proto._onWaitingForKey = function _onWaitingForKey(event) {
    this.log("\"" + event.type + "\" event");
  };
  _proto.attemptSetMediaKeys = function attemptSetMediaKeys(keySystem, mediaKeys) {
    var _this6 = this;
    var queue = this.setMediaKeysQueue.slice();
    this.log("Setting media-keys for \"" + keySystem + "\"");
    // Only one setMediaKeys() can run at one time, and multiple setMediaKeys() operations
    // can be queued for execution for multiple key sessions.
    var setMediaKeysPromise = Promise.all(queue).then(function () {
      if (!_this6.media) {
        throw new Error('Attempted to set mediaKeys without media element attached');
      }
      return _this6.media.setMediaKeys(mediaKeys);
    });
    this.setMediaKeysQueue.push(setMediaKeysPromise);
    return setMediaKeysPromise.then(function () {
      _this6.log("Media-keys set for \"" + keySystem + "\"");
      queue.push(setMediaKeysPromise);
      _this6.setMediaKeysQueue = _this6.setMediaKeysQueue.filter(function (p) {
        return queue.indexOf(p) === -1;
      });
    });
  };
  _proto.generateRequestWithPreferredKeySession = function generateRequestWithPreferredKeySession(context, initDataType, initData, reason) {
    var _this$config$drmSyste,
      _this$config$drmSyste2,
      _this7 = this;
    var generateRequestFilter = (_this$config$drmSyste = this.config.drmSystems) === null || _this$config$drmSyste === void 0 ? void 0 : (_this$config$drmSyste2 = _this$config$drmSyste[context.keySystem]) === null || _this$config$drmSyste2 === void 0 ? void 0 : _this$config$drmSyste2.generateRequest;
    if (generateRequestFilter) {
      try {
        var mappedInitData = generateRequestFilter.call(this.hls, initDataType, initData, context);
        if (!mappedInitData) {
          throw new Error('Invalid response from configured generateRequest filter');
        }
        initDataType = mappedInitData.initDataType;
        initData = context.decryptdata.pssh = mappedInitData.initData ? new Uint8Array(mappedInitData.initData) : null;
      } catch (error) {
        var _this$hls;
        this.warn(error.message);
        if ((_this$hls = this.hls) !== null && _this$hls !== void 0 && _this$hls.config.debug) {
          throw error;
        }
      }
    }
    if (initData === null) {
      this.log("Skipping key-session request for \"" + reason + "\" (no initData)");
      return Promise.resolve(context);
    }
    var keyId = this.getKeyIdString(context.decryptdata);
    this.log("Generating key-session request for \"" + reason + "\": " + keyId + " (init data type: " + initDataType + " length: " + (initData ? initData.byteLength : null) + ")");
    var licenseStatus = new (eventemitter3__WEBPACK_IMPORTED_MODULE_9___default())();
    context.mediaKeysSession.onmessage = function (event) {
      var keySession = context.mediaKeysSession;
      if (!keySession) {
        licenseStatus.emit('error', new Error('invalid state'));
        return;
      }
      var messageType = event.messageType,
        message = event.message;
      _this7.log("\"" + messageType + "\" message event for session \"" + keySession.sessionId + "\" message size: " + message.byteLength);
      if (messageType === 'license-request' || messageType === 'license-renewal') {
        _this7.renewLicense(context, message).catch(function (error) {
          _this7.handleError(error);
          licenseStatus.emit('error', error);
        });
      } else if (messageType === 'license-release') {
        if (context.keySystem === _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_3__.KeySystems.FAIRPLAY) {
          _this7.updateKeySession(context, (0,_utils_keysystem_util__WEBPACK_IMPORTED_MODULE_4__.strToUtf8array)('acknowledged'));
          _this7.removeSession(context);
        }
      } else {
        _this7.warn("unhandled media key message type \"" + messageType + "\"");
      }
    };
    context.mediaKeysSession.onkeystatuseschange = function (event) {
      var keySession = context.mediaKeysSession;
      if (!keySession) {
        licenseStatus.emit('error', new Error('invalid state'));
        return;
      }
      _this7.onKeyStatusChange(context);
      var keyStatus = context.keyStatus;
      licenseStatus.emit('keyStatus', keyStatus);
      if (keyStatus === 'expired') {
        _this7.warn(context.keySystem + " expired for key " + keyId);
        _this7.renewKeySession(context);
      }
    };
    var keyUsablePromise = new Promise(function (resolve, reject) {
      licenseStatus.on('error', reject);
      licenseStatus.on('keyStatus', function (keyStatus) {
        if (keyStatus.startsWith('usable')) {
          resolve();
        } else if (keyStatus === 'output-restricted') {
          reject(new EMEKeyError({
            type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.KEY_SYSTEM_ERROR,
            details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.KEY_SYSTEM_STATUS_OUTPUT_RESTRICTED,
            fatal: false
          }, 'HDCP level output restricted'));
        } else if (keyStatus === 'internal-error') {
          reject(new EMEKeyError({
            type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.KEY_SYSTEM_ERROR,
            details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.KEY_SYSTEM_STATUS_INTERNAL_ERROR,
            fatal: true
          }, "key status changed to \"" + keyStatus + "\""));
        } else if (keyStatus === 'expired') {
          reject(new Error('key expired while generating request'));
        } else {
          _this7.warn("unhandled key status change \"" + keyStatus + "\"");
        }
      });
    });
    return context.mediaKeysSession.generateRequest(initDataType, initData).then(function () {
      var _context$mediaKeysSes;
      _this7.log("Request generated for key-session \"" + ((_context$mediaKeysSes = context.mediaKeysSession) === null || _context$mediaKeysSes === void 0 ? void 0 : _context$mediaKeysSes.sessionId) + "\" keyId: " + keyId);
    }).catch(function (error) {
      throw new EMEKeyError({
        type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.KEY_SYSTEM_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.KEY_SYSTEM_NO_SESSION,
        error: error,
        fatal: false
      }, "Error generating key-session request: " + error);
    }).then(function () {
      return keyUsablePromise;
    }).catch(function (error) {
      licenseStatus.removeAllListeners();
      _this7.removeSession(context);
      throw error;
    }).then(function () {
      licenseStatus.removeAllListeners();
      return context;
    });
  };
  _proto.onKeyStatusChange = function onKeyStatusChange(mediaKeySessionContext) {
    var _this8 = this;
    mediaKeySessionContext.mediaKeysSession.keyStatuses.forEach(function (status, keyId) {
      _this8.log("key status change \"" + status + "\" for keyStatuses keyId: " + _utils_hex__WEBPACK_IMPORTED_MODULE_7__["default"].hexDump('buffer' in keyId ? new Uint8Array(keyId.buffer, keyId.byteOffset, keyId.byteLength) : new Uint8Array(keyId)) + " session keyId: " + _utils_hex__WEBPACK_IMPORTED_MODULE_7__["default"].hexDump(new Uint8Array(mediaKeySessionContext.decryptdata.keyId || [])) + " uri: " + mediaKeySessionContext.decryptdata.uri);
      mediaKeySessionContext.keyStatus = status;
    });
  };
  _proto.fetchServerCertificate = function fetchServerCertificate(keySystem) {
    var _this9 = this;
    return new Promise(function (resolve, reject) {
      var url = _this9.getServerCertificateUrl(keySystem);
      if (!url) {
        return resolve();
      }
      _this9.log("Fetching serverCertificate for \"" + keySystem + "\"");
      var xhr = new XMLHttpRequest();
      xhr.open('GET', url, true);
      xhr.responseType = 'arraybuffer';
      xhr.onreadystatechange = function () {
        if (xhr.readyState === XMLHttpRequest.DONE) {
          if (xhr.status === 200) {
            resolve(xhr.response);
          } else {
            reject(new EMEKeyError({
              type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.KEY_SYSTEM_ERROR,
              details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.KEY_SYSTEM_SERVER_CERTIFICATE_REQUEST_FAILED,
              fatal: true,
              networkDetails: xhr
            }, "\"" + keySystem + "\" certificate request XHR failed (" + url + "). Status: " + xhr.status + " (" + xhr.statusText + ")"));
          }
        }
      };
      xhr.send();
    });
  };
  _proto.setMediaKeysServerCertificate = function setMediaKeysServerCertificate(mediaKeys, keySystem, cert) {
    var _this10 = this;
    return new Promise(function (resolve, reject) {
      mediaKeys.setServerCertificate(cert).then(function (success) {
        _this10.log("setServerCertificate " + (success ? 'success' : 'not supported by CDM') + " (" + (cert === null || cert === void 0 ? void 0 : cert.byteLength) + ") on \"" + keySystem + "\"");
        resolve(mediaKeys);
      }).catch(function (error) {
        reject(new EMEKeyError({
          type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.KEY_SYSTEM_ERROR,
          details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.KEY_SYSTEM_SERVER_CERTIFICATE_UPDATE_FAILED,
          error: error,
          fatal: true
        }, error.message));
      });
    });
  };
  _proto.renewLicense = function renewLicense(context, keyMessage) {
    var _this11 = this;
    return this.requestLicense(context, new Uint8Array(keyMessage)).then(function (data) {
      return _this11.updateKeySession(context, new Uint8Array(data)).catch(function (error) {
        throw new EMEKeyError({
          type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.KEY_SYSTEM_ERROR,
          details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.KEY_SYSTEM_SESSION_UPDATE_FAILED,
          error: error,
          fatal: true
        }, error.message);
      });
    });
  };
  _proto.setupLicenseXHR = function setupLicenseXHR(xhr, url, keysListItem, licenseChallenge) {
    var _this12 = this;
    var licenseXhrSetup = this.config.licenseXhrSetup;
    if (!licenseXhrSetup) {
      xhr.open('POST', url, true);
      return Promise.resolve({
        xhr: xhr,
        licenseChallenge: licenseChallenge
      });
    }
    return Promise.resolve().then(function () {
      if (!keysListItem.decryptdata) {
        throw new Error('Key removed');
      }
      return licenseXhrSetup.call(_this12.hls, xhr, url, keysListItem, licenseChallenge);
    }).catch(function (error) {
      if (!keysListItem.decryptdata) {
        // Key session removed. Cancel license request.
        throw error;
      }
      // let's try to open before running setup
      xhr.open('POST', url, true);
      return licenseXhrSetup.call(_this12.hls, xhr, url, keysListItem, licenseChallenge);
    }).then(function (licenseXhrSetupResult) {
      // if licenseXhrSetup did not yet call open, let's do it now
      if (!xhr.readyState) {
        xhr.open('POST', url, true);
      }
      var finalLicenseChallenge = licenseXhrSetupResult ? licenseXhrSetupResult : licenseChallenge;
      return {
        xhr: xhr,
        licenseChallenge: finalLicenseChallenge
      };
    });
  };
  _proto.requestLicense = function requestLicense(keySessionContext, licenseChallenge) {
    var _this13 = this;
    return new Promise(function (resolve, reject) {
      var url = _this13.getLicenseServerUrl(keySessionContext.keySystem);
      _this13.log("Sending license request to URL: " + url);
      var xhr = new XMLHttpRequest();
      xhr.responseType = 'arraybuffer';
      xhr.onreadystatechange = function () {
        if (!_this13.hls || !keySessionContext.mediaKeysSession) {
          return reject(new Error('invalid state'));
        }
        if (xhr.readyState === 4) {
          if (xhr.status === 200) {
            _this13._requestLicenseFailureCount = 0;
            var data = xhr.response;
            _this13.log("License received " + (data instanceof ArrayBuffer ? data.byteLength : data));
            var licenseResponseCallback = _this13.config.licenseResponseCallback;
            if (licenseResponseCallback) {
              try {
                data = licenseResponseCallback.call(_this13.hls, xhr, url, keySessionContext);
              } catch (error) {
                _this13.error(error);
              }
            }
            resolve(data);
          } else {
            _this13._requestLicenseFailureCount++;
            if (_this13._requestLicenseFailureCount > MAX_LICENSE_REQUEST_FAILURES || xhr.status >= 400 && xhr.status < 500) {
              reject(new EMEKeyError({
                type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.KEY_SYSTEM_ERROR,
                details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.KEY_SYSTEM_LICENSE_REQUEST_FAILED,
                fatal: true,
                networkDetails: xhr
              }, "License Request XHR failed (" + url + "). Status: " + xhr.status + " (" + xhr.statusText + ")"));
            } else {
              var attemptsLeft = MAX_LICENSE_REQUEST_FAILURES - _this13._requestLicenseFailureCount + 1;
              _this13.warn("Retrying license request, " + attemptsLeft + " attempts left");
              _this13.requestLicense(keySessionContext, licenseChallenge).then(resolve, reject);
            }
          }
        }
      };
      if (keySessionContext.licenseXhr && keySessionContext.licenseXhr.readyState !== XMLHttpRequest.DONE) {
        keySessionContext.licenseXhr.abort();
      }
      keySessionContext.licenseXhr = xhr;
      _this13.setupLicenseXHR(xhr, url, keySessionContext, licenseChallenge).then(function (_ref5) {
        var xhr = _ref5.xhr,
          licenseChallenge = _ref5.licenseChallenge;
        xhr.send(licenseChallenge);
      });
    });
  };
  _proto.onMediaAttached = function onMediaAttached(event, data) {
    if (!this.config.emeEnabled) {
      return;
    }
    var media = data.media;

    // keep reference of media
    this.media = media;
    media.addEventListener('encrypted', this.onMediaEncrypted);
    media.addEventListener('waitingforkey', this.onWaitingForKey);
  };
  _proto.onMediaDetached = function onMediaDetached() {
    var _this14 = this;
    var media = this.media;
    var mediaKeysList = this.mediaKeySessions;
    if (media) {
      media.removeEventListener('encrypted', this.onMediaEncrypted);
      media.removeEventListener('waitingforkey', this.onWaitingForKey);
      this.media = null;
    }
    this._requestLicenseFailureCount = 0;
    this.setMediaKeysQueue = [];
    this.mediaKeySessions = [];
    this.keyIdToKeySessionPromise = {};
    _loader_level_key__WEBPACK_IMPORTED_MODULE_6__.LevelKey.clearKeyUriToKeyIdMap();

    // Close all sessions and remove media keys from the video element.
    var keySessionCount = mediaKeysList.length;
    EMEController.CDMCleanupPromise = Promise.all(mediaKeysList.map(function (mediaKeySessionContext) {
      return _this14.removeSession(mediaKeySessionContext);
    }).concat(media === null || media === void 0 ? void 0 : media.setMediaKeys(null).catch(function (error) {
      _this14.log("Could not clear media keys: " + error + ". media.src: " + (media === null || media === void 0 ? void 0 : media.src));
    }))).then(function () {
      if (keySessionCount) {
        _this14.log('finished closing key sessions and clearing media keys');
        mediaKeysList.length = 0;
      }
    }).catch(function (error) {
      _this14.log("Could not close sessions and clear media keys: " + error + ". media.src: " + (media === null || media === void 0 ? void 0 : media.src));
    });
  };
  _proto.onManifestLoaded = function onManifestLoaded(event, _ref6) {
    var sessionKeys = _ref6.sessionKeys;
    if (!sessionKeys || !this.config.emeEnabled) {
      return;
    }
    if (!this.keyFormatPromise) {
      var keyFormats = sessionKeys.reduce(function (formats, sessionKey) {
        if (formats.indexOf(sessionKey.keyFormat) === -1) {
          formats.push(sessionKey.keyFormat);
        }
        return formats;
      }, []);
      this.log("Selecting key-system from session-keys " + keyFormats.join(', '));
      this.keyFormatPromise = this.getKeyFormatPromise(keyFormats);
    }
  };
  _proto.removeSession = function removeSession(mediaKeySessionContext) {
    var _this15 = this;
    var mediaKeysSession = mediaKeySessionContext.mediaKeysSession,
      licenseXhr = mediaKeySessionContext.licenseXhr;
    if (mediaKeysSession) {
      this.log("Remove licenses and keys and close session " + mediaKeysSession.sessionId);
      mediaKeysSession.onmessage = null;
      mediaKeysSession.onkeystatuseschange = null;
      if (licenseXhr && licenseXhr.readyState !== XMLHttpRequest.DONE) {
        licenseXhr.abort();
      }
      mediaKeySessionContext.mediaKeysSession = mediaKeySessionContext.decryptdata = mediaKeySessionContext.licenseXhr = undefined;
      var index = this.mediaKeySessions.indexOf(mediaKeySessionContext);
      if (index > -1) {
        this.mediaKeySessions.splice(index, 1);
      }
      return mediaKeysSession.remove().catch(function (error) {
        _this15.log("Could not remove session: " + error);
      }).then(function () {
        return mediaKeysSession.close();
      }).catch(function (error) {
        _this15.log("Could not close session: " + error);
      });
    }
  };
  return EMEController;
}();
EMEController.CDMCleanupPromise = void 0;
var EMEKeyError = /*#__PURE__*/function (_Error) {
  _inheritsLoose(EMEKeyError, _Error);
  function EMEKeyError(data, message) {
    var _this16;
    _this16 = _Error.call(this, message) || this;
    _this16.data = void 0;
    _this16.data = data;
    data.err = data.error;
    return _this16;
  }
  return EMEKeyError;
}( /*#__PURE__*/_wrapNativeSuper(Error));
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (EMEController);

/***/ }),

/***/ "./src/controller/fps-controller.ts":
/*!******************************************!*\
  !*** ./src/controller/fps-controller.ts ***!
  \******************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");


var FPSController = /*#__PURE__*/function () {
  // stream controller must be provided as a dependency!

  function FPSController(hls) {
    this.hls = void 0;
    this.isVideoPlaybackQualityAvailable = false;
    this.timer = void 0;
    this.media = null;
    this.lastTime = void 0;
    this.lastDroppedFrames = 0;
    this.lastDecodedFrames = 0;
    this.streamController = void 0;
    this.hls = hls;
    this.registerListeners();
  }
  var _proto = FPSController.prototype;
  _proto.setStreamController = function setStreamController(streamController) {
    this.streamController = streamController;
  };
  _proto.registerListeners = function registerListeners() {
    this.hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
  };
  _proto.unregisterListeners = function unregisterListeners() {
    this.hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHING, this.onMediaAttaching);
  };
  _proto.destroy = function destroy() {
    if (this.timer) {
      clearInterval(this.timer);
    }
    this.unregisterListeners();
    this.isVideoPlaybackQualityAvailable = false;
    this.media = null;
  };
  _proto.onMediaAttaching = function onMediaAttaching(event, data) {
    var config = this.hls.config;
    if (config.capLevelOnFPSDrop) {
      var media = data.media instanceof self.HTMLVideoElement ? data.media : null;
      this.media = media;
      if (media && typeof media.getVideoPlaybackQuality === 'function') {
        this.isVideoPlaybackQualityAvailable = true;
      }
      self.clearInterval(this.timer);
      this.timer = self.setInterval(this.checkFPSInterval.bind(this), config.fpsDroppedMonitoringPeriod);
    }
  };
  _proto.checkFPS = function checkFPS(video, decodedFrames, droppedFrames) {
    var currentTime = performance.now();
    if (decodedFrames) {
      if (this.lastTime) {
        var currentPeriod = currentTime - this.lastTime;
        var currentDropped = droppedFrames - this.lastDroppedFrames;
        var currentDecoded = decodedFrames - this.lastDecodedFrames;
        var droppedFPS = 1000 * currentDropped / currentPeriod;
        var hls = this.hls;
        hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.FPS_DROP, {
          currentDropped: currentDropped,
          currentDecoded: currentDecoded,
          totalDroppedFrames: droppedFrames
        });
        if (droppedFPS > 0) {
          // logger.log('checkFPS : droppedFPS/decodedFPS:' + droppedFPS/(1000 * currentDecoded / currentPeriod));
          if (currentDropped > hls.config.fpsDroppedMonitoringThreshold * currentDecoded) {
            var currentLevel = hls.currentLevel;
            _utils_logger__WEBPACK_IMPORTED_MODULE_1__.logger.warn('drop FPS ratio greater than max allowed value for currentLevel: ' + currentLevel);
            if (currentLevel > 0 && (hls.autoLevelCapping === -1 || hls.autoLevelCapping >= currentLevel)) {
              currentLevel = currentLevel - 1;
              hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.FPS_DROP_LEVEL_CAPPING, {
                level: currentLevel,
                droppedLevel: hls.currentLevel
              });
              hls.autoLevelCapping = currentLevel;
              this.streamController.nextLevelSwitch();
            }
          }
        }
      }
      this.lastTime = currentTime;
      this.lastDroppedFrames = droppedFrames;
      this.lastDecodedFrames = decodedFrames;
    }
  };
  _proto.checkFPSInterval = function checkFPSInterval() {
    var video = this.media;
    if (video) {
      if (this.isVideoPlaybackQualityAvailable) {
        var videoPlaybackQuality = video.getVideoPlaybackQuality();
        this.checkFPS(video, videoPlaybackQuality.totalVideoFrames, videoPlaybackQuality.droppedVideoFrames);
      } else {
        // HTMLVideoElement doesn't include the webkit types
        this.checkFPS(video, video.webkitDecodedFrameCount, video.webkitDroppedFrameCount);
      }
    }
  };
  return FPSController;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (FPSController);

/***/ }),

/***/ "./src/controller/fragment-finders.ts":
/*!********************************************!*\
  !*** ./src/controller/fragment-finders.ts ***!
  \********************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "findFragWithCC": () => (/* binding */ findFragWithCC),
/* harmony export */   "findFragmentByPDT": () => (/* binding */ findFragmentByPDT),
/* harmony export */   "findFragmentByPTS": () => (/* binding */ findFragmentByPTS),
/* harmony export */   "fragmentWithinToleranceTest": () => (/* binding */ fragmentWithinToleranceTest),
/* harmony export */   "pdtWithinToleranceTest": () => (/* binding */ pdtWithinToleranceTest)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _utils_binary_search__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../utils/binary-search */ "./src/utils/binary-search.ts");


/**
 * Returns first fragment whose endPdt value exceeds the given PDT.
 * @param {Array<Fragment>} fragments - The array of candidate fragments
 * @param {number|null} [PDTValue = null] - The PDT value which must be exceeded
 * @param {number} [maxFragLookUpTolerance = 0] - The amount of time that a fragment's start/end can be within in order to be considered contiguous
 * @returns {*|null} fragment - The best matching fragment
 */
function findFragmentByPDT(fragments, PDTValue, maxFragLookUpTolerance) {
  if (PDTValue === null || !Array.isArray(fragments) || !fragments.length || !(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(PDTValue)) {
    return null;
  }

  // if less than start
  var startPDT = fragments[0].programDateTime;
  if (PDTValue < (startPDT || 0)) {
    return null;
  }
  var endPDT = fragments[fragments.length - 1].endProgramDateTime;
  if (PDTValue >= (endPDT || 0)) {
    return null;
  }
  maxFragLookUpTolerance = maxFragLookUpTolerance || 0;
  for (var seg = 0; seg < fragments.length; ++seg) {
    var frag = fragments[seg];
    if (pdtWithinToleranceTest(PDTValue, maxFragLookUpTolerance, frag)) {
      return frag;
    }
  }
  return null;
}

/**
 * Finds a fragment based on the SN of the previous fragment; or based on the needs of the current buffer.
 * This method compensates for small buffer gaps by applying a tolerance to the start of any candidate fragment, thus
 * breaking any traps which would cause the same fragment to be continuously selected within a small range.
 * @param {*} fragPrevious - The last frag successfully appended
 * @param {Array} fragments - The array of candidate fragments
 * @param {number} [bufferEnd = 0] - The end of the contiguous buffered range the playhead is currently within
 * @param {number} maxFragLookUpTolerance - The amount of time that a fragment's start/end can be within in order to be considered contiguous
 * @returns {*} foundFrag - The best matching fragment
 */
function findFragmentByPTS(fragPrevious, fragments, bufferEnd, maxFragLookUpTolerance) {
  if (bufferEnd === void 0) {
    bufferEnd = 0;
  }
  if (maxFragLookUpTolerance === void 0) {
    maxFragLookUpTolerance = 0;
  }
  var fragNext = null;
  if (fragPrevious) {
    fragNext = fragments[fragPrevious.sn - fragments[0].sn + 1] || null;
  } else if (bufferEnd === 0 && fragments[0].start === 0) {
    fragNext = fragments[0];
  }
  // Prefer the next fragment if it's within tolerance
  if (fragNext && fragmentWithinToleranceTest(bufferEnd, maxFragLookUpTolerance, fragNext) === 0) {
    return fragNext;
  }
  // We might be seeking past the tolerance so find the best match
  var foundFragment = _utils_binary_search__WEBPACK_IMPORTED_MODULE_1__["default"].search(fragments, fragmentWithinToleranceTest.bind(null, bufferEnd, maxFragLookUpTolerance));
  if (foundFragment && (foundFragment !== fragPrevious || !fragNext)) {
    return foundFragment;
  }
  // If no match was found return the next fragment after fragPrevious, or null
  return fragNext;
}

/**
 * The test function used by the findFragmentBySn's BinarySearch to look for the best match to the current buffer conditions.
 * @param {*} candidate - The fragment to test
 * @param {number} [bufferEnd = 0] - The end of the current buffered range the playhead is currently within
 * @param {number} [maxFragLookUpTolerance = 0] - The amount of time that a fragment's start can be within in order to be considered contiguous
 * @returns {number} - 0 if it matches, 1 if too low, -1 if too high
 */
function fragmentWithinToleranceTest(bufferEnd, maxFragLookUpTolerance, candidate) {
  if (bufferEnd === void 0) {
    bufferEnd = 0;
  }
  if (maxFragLookUpTolerance === void 0) {
    maxFragLookUpTolerance = 0;
  }
  // eagerly accept an accurate match (no tolerance)
  if (candidate.start <= bufferEnd && candidate.start + candidate.duration > bufferEnd) {
    return 0;
  }
  // offset should be within fragment boundary - config.maxFragLookUpTolerance
  // this is to cope with situations like
  // bufferEnd = 9.991
  // frag[Ø] : [0,10]
  // frag[1] : [10,20]
  // bufferEnd is within frag[0] range ... although what we are expecting is to return frag[1] here
  //              frag start               frag start+duration
  //                  |-----------------------------|
  //              <--->                         <--->
  //  ...--------><-----------------------------><---------....
  // previous frag         matching fragment         next frag
  //  return -1             return 0                 return 1
  // logger.log(`level/sn/start/end/bufEnd:${level}/${candidate.sn}/${candidate.start}/${(candidate.start+candidate.duration)}/${bufferEnd}`);
  // Set the lookup tolerance to be small enough to detect the current segment - ensures we don't skip over very small segments
  var candidateLookupTolerance = Math.min(maxFragLookUpTolerance, candidate.duration + (candidate.deltaPTS ? candidate.deltaPTS : 0));
  if (candidate.start + candidate.duration - candidateLookupTolerance <= bufferEnd) {
    return 1;
  } else if (candidate.start - candidateLookupTolerance > bufferEnd && candidate.start) {
    // if maxFragLookUpTolerance will have negative value then don't return -1 for first element
    return -1;
  }
  return 0;
}

/**
 * The test function used by the findFragmentByPdt's BinarySearch to look for the best match to the current buffer conditions.
 * This function tests the candidate's program date time values, as represented in Unix time
 * @param {*} candidate - The fragment to test
 * @param {number} [pdtBufferEnd = 0] - The Unix time representing the end of the current buffered range
 * @param {number} [maxFragLookUpTolerance = 0] - The amount of time that a fragment's start can be within in order to be considered contiguous
 * @returns {boolean} True if contiguous, false otherwise
 */
function pdtWithinToleranceTest(pdtBufferEnd, maxFragLookUpTolerance, candidate) {
  var candidateLookupTolerance = Math.min(maxFragLookUpTolerance, candidate.duration + (candidate.deltaPTS ? candidate.deltaPTS : 0)) * 1000;

  // endProgramDateTime can be null, default to zero
  var endProgramDateTime = candidate.endProgramDateTime || 0;
  return endProgramDateTime - candidateLookupTolerance > pdtBufferEnd;
}
function findFragWithCC(fragments, cc) {
  return _utils_binary_search__WEBPACK_IMPORTED_MODULE_1__["default"].search(fragments, function (candidate) {
    if (candidate.cc < cc) {
      return 1;
    } else if (candidate.cc > cc) {
      return -1;
    } else {
      return 0;
    }
  });
}

/***/ }),

/***/ "./src/controller/fragment-tracker.ts":
/*!********************************************!*\
  !*** ./src/controller/fragment-tracker.ts ***!
  \********************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "FragmentState": () => (/* binding */ FragmentState),
/* harmony export */   "FragmentTracker": () => (/* binding */ FragmentTracker)
/* harmony export */ });
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");


var FragmentState;
(function (FragmentState) {
  FragmentState["NOT_LOADED"] = "NOT_LOADED";
  FragmentState["APPENDING"] = "APPENDING";
  FragmentState["PARTIAL"] = "PARTIAL";
  FragmentState["OK"] = "OK";
})(FragmentState || (FragmentState = {}));
var FragmentTracker = /*#__PURE__*/function () {
  function FragmentTracker(hls) {
    this.activeFragment = null;
    this.activeParts = null;
    this.endListFragments = Object.create(null);
    this.fragments = Object.create(null);
    this.timeRanges = Object.create(null);
    this.bufferPadding = 0.2;
    this.hls = void 0;
    this.hls = hls;
    this._registerListeners();
  }
  var _proto = FragmentTracker.prototype;
  _proto._registerListeners = function _registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.BUFFER_APPENDED, this.onBufferAppended, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.FRAG_BUFFERED, this.onFragBuffered, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.FRAG_LOADED, this.onFragLoaded, this);
  };
  _proto._unregisterListeners = function _unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.BUFFER_APPENDED, this.onBufferAppended, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.FRAG_BUFFERED, this.onFragBuffered, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.FRAG_LOADED, this.onFragLoaded, this);
  };
  _proto.destroy = function destroy() {
    this._unregisterListeners();
    // @ts-ignore
    this.fragments =
    // @ts-ignore
    this.endListFragments = this.timeRanges = this.activeFragment = this.activeParts = null;
  }

  /**
   * Return a Fragment with an appended range that matches the position and levelType.
   * If not found any Fragment, return null
   */;
  _proto.getAppendedFrag = function getAppendedFrag(position, levelType) {
    if (levelType === _types_loader__WEBPACK_IMPORTED_MODULE_1__.PlaylistLevelType.MAIN) {
      var activeFragment = this.activeFragment,
        activeParts = this.activeParts;
      if (!activeFragment) {
        return null;
      }
      if (activeParts) {
        for (var i = activeParts.length; i--;) {
          var activePart = activeParts[i];
          var appendedPTS = activePart ? activePart.end : activeFragment.appendedPTS;
          if (activePart.start <= position && appendedPTS !== undefined && position <= appendedPTS) {
            // 9 is a magic number. remove parts from lookup after a match but keep some short seeks back.
            if (i > 9) {
              this.activeParts = activeParts.slice(i - 9);
            }
            return activePart;
          }
        }
      } else if (activeFragment.start <= position && activeFragment.appendedPTS !== undefined && position <= activeFragment.appendedPTS) {
        return activeFragment;
      }
    }
    return this.getBufferedFrag(position, levelType);
  }

  /**
   * Return a buffered Fragment that matches the position and levelType.
   * A buffered Fragment is one whose loading, parsing and appending is done (completed or "partial" meaning aborted).
   * If not found any Fragment, return null
   */;
  _proto.getBufferedFrag = function getBufferedFrag(position, levelType) {
    var fragments = this.fragments;
    var keys = Object.keys(fragments);
    for (var i = keys.length; i--;) {
      var fragmentEntity = fragments[keys[i]];
      if ((fragmentEntity === null || fragmentEntity === void 0 ? void 0 : fragmentEntity.body.type) === levelType && fragmentEntity.buffered) {
        var frag = fragmentEntity.body;
        if (frag.start <= position && position <= frag.end) {
          return frag;
        }
      }
    }
    return null;
  }

  /**
   * Partial fragments effected by coded frame eviction will be removed
   * The browser will unload parts of the buffer to free up memory for new buffer data
   * Fragments will need to be reloaded when the buffer is freed up, removing partial fragments will allow them to reload(since there might be parts that are still playable)
   */;
  _proto.detectEvictedFragments = function detectEvictedFragments(elementaryStream, timeRange, playlistType) {
    var _this = this;
    if (this.timeRanges) {
      this.timeRanges[elementaryStream] = timeRange;
    }
    // Check if any flagged fragments have been unloaded
    Object.keys(this.fragments).forEach(function (key) {
      var fragmentEntity = _this.fragments[key];
      if (!fragmentEntity) {
        return;
      }
      if (!fragmentEntity.buffered && !fragmentEntity.loaded) {
        if (fragmentEntity.body.type === playlistType) {
          _this.removeFragment(fragmentEntity.body);
        }
        return;
      }
      var esData = fragmentEntity.range[elementaryStream];
      if (!esData) {
        return;
      }
      esData.time.some(function (time) {
        var isNotBuffered = !_this.isTimeBuffered(time.startPTS, time.endPTS, timeRange);
        if (isNotBuffered) {
          // Unregister partial fragment as it needs to load again to be reused
          _this.removeFragment(fragmentEntity.body);
        }
        return isNotBuffered;
      });
    });
  }

  /**
   * Checks if the fragment passed in is loaded in the buffer properly
   * Partially loaded fragments will be registered as a partial fragment
   */;
  _proto.detectPartialFragments = function detectPartialFragments(data) {
    var _this2 = this;
    var timeRanges = this.timeRanges;
    var frag = data.frag,
      part = data.part;
    if (!timeRanges || frag.sn === 'initSegment') {
      return;
    }
    var fragKey = getFragmentKey(frag);
    var fragmentEntity = this.fragments[fragKey];
    if (!fragmentEntity) {
      return;
    }
    Object.keys(timeRanges).forEach(function (elementaryStream) {
      var streamInfo = frag.elementaryStreams[elementaryStream];
      if (!streamInfo) {
        return;
      }
      var timeRange = timeRanges[elementaryStream];
      var partial = part !== null || streamInfo.partial === true;
      fragmentEntity.range[elementaryStream] = _this2.getBufferedTimes(frag, part, partial, timeRange);
    });
    fragmentEntity.loaded = null;
    if (Object.keys(fragmentEntity.range).length) {
      fragmentEntity.buffered = true;
      if (fragmentEntity.body.endList) {
        this.endListFragments[fragmentEntity.body.type] = fragmentEntity;
      }
    } else {
      // remove fragment if nothing was appended
      this.removeFragment(fragmentEntity.body);
    }
  };
  _proto.fragBuffered = function fragBuffered(frag) {
    var fragKey = getFragmentKey(frag);
    var fragmentEntity = this.fragments[fragKey];
    if (fragmentEntity) {
      fragmentEntity.loaded = null;
      fragmentEntity.buffered = true;
    }
  };
  _proto.getBufferedTimes = function getBufferedTimes(fragment, part, partial, timeRange) {
    var buffered = {
      time: [],
      partial: partial
    };
    var startPTS = part ? part.start : fragment.start;
    var endPTS = part ? part.end : fragment.end;
    var minEndPTS = fragment.minEndPTS || endPTS;
    var maxStartPTS = fragment.maxStartPTS || startPTS;
    for (var i = 0; i < timeRange.length; i++) {
      var startTime = timeRange.start(i) - this.bufferPadding;
      var endTime = timeRange.end(i) + this.bufferPadding;
      if (maxStartPTS >= startTime && minEndPTS <= endTime) {
        // Fragment is entirely contained in buffer
        // No need to check the other timeRange times since it's completely playable
        buffered.time.push({
          startPTS: Math.max(startPTS, timeRange.start(i)),
          endPTS: Math.min(endPTS, timeRange.end(i))
        });
        break;
      } else if (startPTS < endTime && endPTS > startTime) {
        buffered.partial = true;
        // Check for intersection with buffer
        // Get playable sections of the fragment
        buffered.time.push({
          startPTS: Math.max(startPTS, timeRange.start(i)),
          endPTS: Math.min(endPTS, timeRange.end(i))
        });
      } else if (endPTS <= startTime) {
        // No need to check the rest of the timeRange as it is in order
        break;
      }
    }
    return buffered;
  }

  /**
   * Gets the partial fragment for a certain time
   */;
  _proto.getPartialFragment = function getPartialFragment(time) {
    var bestFragment = null;
    var timePadding;
    var startTime;
    var endTime;
    var bestOverlap = 0;
    var bufferPadding = this.bufferPadding,
      fragments = this.fragments;
    Object.keys(fragments).forEach(function (key) {
      var fragmentEntity = fragments[key];
      if (!fragmentEntity) {
        return;
      }
      if (isPartial(fragmentEntity)) {
        startTime = fragmentEntity.body.start - bufferPadding;
        endTime = fragmentEntity.body.end + bufferPadding;
        if (time >= startTime && time <= endTime) {
          // Use the fragment that has the most padding from start and end time
          timePadding = Math.min(time - startTime, endTime - time);
          if (bestOverlap <= timePadding) {
            bestFragment = fragmentEntity.body;
            bestOverlap = timePadding;
          }
        }
      }
    });
    return bestFragment;
  };
  _proto.isEndListAppended = function isEndListAppended(type) {
    var lastFragmentEntity = this.endListFragments[type];
    return lastFragmentEntity !== undefined && (lastFragmentEntity.buffered || isPartial(lastFragmentEntity));
  };
  _proto.getState = function getState(fragment) {
    var fragKey = getFragmentKey(fragment);
    var fragmentEntity = this.fragments[fragKey];
    if (fragmentEntity) {
      if (!fragmentEntity.buffered) {
        return FragmentState.APPENDING;
      } else if (isPartial(fragmentEntity)) {
        return FragmentState.PARTIAL;
      } else {
        return FragmentState.OK;
      }
    }
    return FragmentState.NOT_LOADED;
  };
  _proto.isTimeBuffered = function isTimeBuffered(startPTS, endPTS, timeRange) {
    var startTime;
    var endTime;
    for (var i = 0; i < timeRange.length; i++) {
      startTime = timeRange.start(i) - this.bufferPadding;
      endTime = timeRange.end(i) + this.bufferPadding;
      if (startPTS >= startTime && endPTS <= endTime) {
        return true;
      }
      if (endPTS <= startTime) {
        // No need to check the rest of the timeRange as it is in order
        return false;
      }
    }
    return false;
  };
  _proto.onFragLoaded = function onFragLoaded(event, data) {
    var frag = data.frag,
      part = data.part;
    // don't track initsegment (for which sn is not a number)
    // don't track frags used for bitrateTest, they're irrelevant.
    // don't track parts for memory efficiency
    if (frag.sn === 'initSegment' || frag.bitrateTest || part) {
      return;
    }
    var fragKey = getFragmentKey(frag);
    this.fragments[fragKey] = {
      body: frag,
      loaded: data,
      buffered: false,
      range: Object.create(null)
    };
  };
  _proto.onBufferAppended = function onBufferAppended(event, data) {
    var _this3 = this;
    var frag = data.frag,
      part = data.part,
      timeRanges = data.timeRanges;
    if (frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_1__.PlaylistLevelType.MAIN) {
      if (this.activeFragment !== frag) {
        this.activeFragment = frag;
        frag.appendedPTS = undefined;
      }
      if (part) {
        var activeParts = this.activeParts;
        if (!activeParts) {
          this.activeParts = activeParts = [];
        }
        activeParts.push(part);
      } else {
        this.activeParts = null;
      }
    }
    // Store the latest timeRanges loaded in the buffer
    this.timeRanges = timeRanges;
    Object.keys(timeRanges).forEach(function (elementaryStream) {
      var timeRange = timeRanges[elementaryStream];
      _this3.detectEvictedFragments(elementaryStream, timeRange);
      if (!part && frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_1__.PlaylistLevelType.MAIN) {
        var streamInfo = frag.elementaryStreams[elementaryStream];
        if (!streamInfo) {
          return;
        }
        for (var i = 0; i < timeRange.length; i++) {
          var rangeEnd = timeRange.end(i);
          if (rangeEnd <= streamInfo.endPTS && rangeEnd > streamInfo.startPTS) {
            frag.appendedPTS = Math.max(rangeEnd, frag.appendedPTS || 0);
          } else {
            frag.appendedPTS = streamInfo.endPTS;
          }
        }
      }
    });
  };
  _proto.onFragBuffered = function onFragBuffered(event, data) {
    this.detectPartialFragments(data);
  };
  _proto.hasFragment = function hasFragment(fragment) {
    var fragKey = getFragmentKey(fragment);
    return !!this.fragments[fragKey];
  };
  _proto.removeFragmentsInRange = function removeFragmentsInRange(start, end, playlistType) {
    var _this4 = this;
    Object.keys(this.fragments).forEach(function (key) {
      var fragmentEntity = _this4.fragments[key];
      if (!fragmentEntity) {
        return;
      }
      if (fragmentEntity.buffered) {
        var frag = fragmentEntity.body;
        if (frag.type === playlistType && frag.start < end && frag.end > start) {
          _this4.removeFragment(frag);
        }
      }
    });
  };
  _proto.removeFragment = function removeFragment(fragment) {
    var fragKey = getFragmentKey(fragment);
    fragment.stats.loaded = 0;
    fragment.clearElementaryStreamInfo();
    fragment.appendedPTS = undefined;
    delete this.fragments[fragKey];
    if (fragment.endList) {
      delete this.endListFragments[fragment.type];
    }
  };
  _proto.removeAllFragments = function removeAllFragments() {
    this.fragments = Object.create(null);
    this.endListFragments = Object.create(null);
    this.activeFragment = null;
    this.activeParts = null;
  };
  return FragmentTracker;
}();
function isPartial(fragmentEntity) {
  var _fragmentEntity$range, _fragmentEntity$range2;
  return fragmentEntity.buffered && (((_fragmentEntity$range = fragmentEntity.range.video) === null || _fragmentEntity$range === void 0 ? void 0 : _fragmentEntity$range.partial) || ((_fragmentEntity$range2 = fragmentEntity.range.audio) === null || _fragmentEntity$range2 === void 0 ? void 0 : _fragmentEntity$range2.partial));
}
function getFragmentKey(fragment) {
  return fragment.type + "_" + fragment.level + "_" + fragment.urlId + "_" + fragment.sn;
}

/***/ }),

/***/ "./src/controller/gap-controller.ts":
/*!******************************************!*\
  !*** ./src/controller/gap-controller.ts ***!
  \******************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "MAX_START_GAP_JUMP": () => (/* binding */ MAX_START_GAP_JUMP),
/* harmony export */   "SKIP_BUFFER_HOLE_STEP_SECONDS": () => (/* binding */ SKIP_BUFFER_HOLE_STEP_SECONDS),
/* harmony export */   "SKIP_BUFFER_RANGE_START": () => (/* binding */ SKIP_BUFFER_RANGE_START),
/* harmony export */   "STALL_MINIMUM_DURATION_MS": () => (/* binding */ STALL_MINIMUM_DURATION_MS),
/* harmony export */   "default": () => (/* binding */ GapController)
/* harmony export */ });
/* harmony import */ var _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../utils/buffer-helper */ "./src/utils/buffer-helper.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");




var STALL_MINIMUM_DURATION_MS = 250;
var MAX_START_GAP_JUMP = 2.0;
var SKIP_BUFFER_HOLE_STEP_SECONDS = 0.1;
var SKIP_BUFFER_RANGE_START = 0.05;
var GapController = /*#__PURE__*/function () {
  function GapController(config, media, fragmentTracker, hls) {
    this.config = void 0;
    this.media = null;
    this.fragmentTracker = void 0;
    this.hls = void 0;
    this.nudgeRetry = 0;
    this.stallReported = false;
    this.stalled = null;
    this.moved = false;
    this.seeking = false;
    this.config = config;
    this.media = media;
    this.fragmentTracker = fragmentTracker;
    this.hls = hls;
  }
  var _proto = GapController.prototype;
  _proto.destroy = function destroy() {
    this.media = null;
    // @ts-ignore
    this.hls = this.fragmentTracker = null;
  }

  /**
   * Checks if the playhead is stuck within a gap, and if so, attempts to free it.
   * A gap is an unbuffered range between two buffered ranges (or the start and the first buffered range).
   *
   * @param {number} lastCurrentTime Previously read playhead position
   */;
  _proto.poll = function poll(lastCurrentTime, activeFrag) {
    var config = this.config,
      media = this.media,
      stalled = this.stalled;
    if (media === null) {
      return;
    }
    var currentTime = media.currentTime,
      seeking = media.seeking;
    var seeked = this.seeking && !seeking;
    var beginSeek = !this.seeking && seeking;
    this.seeking = seeking;

    // The playhead is moving, no-op
    if (currentTime !== lastCurrentTime) {
      this.moved = true;
      if (stalled !== null) {
        // The playhead is now moving, but was previously stalled
        if (this.stallReported) {
          var _stalledDuration = self.performance.now() - stalled;
          _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn("playback not stuck anymore @" + currentTime + ", after " + Math.round(_stalledDuration) + "ms");
          this.stallReported = false;
        }
        this.stalled = null;
        this.nudgeRetry = 0;
      }
      return;
    }

    // Clear stalled state when beginning or finishing seeking so that we don't report stalls coming out of a seek
    if (beginSeek || seeked) {
      this.stalled = null;
    }

    // The playhead should not be moving
    if (media.paused && !seeking || media.ended || media.playbackRate === 0 || !_utils_buffer_helper__WEBPACK_IMPORTED_MODULE_0__.BufferHelper.getBuffered(media).length) {
      return;
    }
    var bufferInfo = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_0__.BufferHelper.bufferInfo(media, currentTime, 0);
    var isBuffered = bufferInfo.len > 0;
    var nextStart = bufferInfo.nextStart || 0;

    // There is no playable buffer (seeked, waiting for buffer)
    if (!isBuffered && !nextStart) {
      return;
    }
    if (seeking) {
      // Waiting for seeking in a buffered range to complete
      var hasEnoughBuffer = bufferInfo.len > MAX_START_GAP_JUMP;
      // Next buffered range is too far ahead to jump to while still seeking
      var noBufferGap = !nextStart || activeFrag && activeFrag.start <= currentTime || nextStart - currentTime > MAX_START_GAP_JUMP && !this.fragmentTracker.getPartialFragment(currentTime);
      if (hasEnoughBuffer || noBufferGap) {
        return;
      }
      // Reset moved state when seeking to a point in or before a gap
      this.moved = false;
    }

    // Skip start gaps if we haven't played, but the last poll detected the start of a stall
    // The addition poll gives the browser a chance to jump the gap for us
    if (!this.moved && this.stalled !== null) {
      var _level$details;
      // Jump start gaps within jump threshold
      var startJump = Math.max(nextStart, bufferInfo.start || 0) - currentTime;

      // When joining a live stream with audio tracks, account for live playlist window sliding by allowing
      // a larger jump over start gaps caused by the audio-stream-controller buffering a start fragment
      // that begins over 1 target duration after the video start position.
      var level = this.hls.levels ? this.hls.levels[this.hls.currentLevel] : null;
      var isLive = level === null || level === void 0 ? void 0 : (_level$details = level.details) === null || _level$details === void 0 ? void 0 : _level$details.live;
      var maxStartGapJump = isLive ? level.details.targetduration * 2 : MAX_START_GAP_JUMP;
      if (startJump > 0 && startJump <= maxStartGapJump) {
        this._trySkipBufferHole(null);
        return;
      }
    }

    // Start tracking stall time
    var tnow = self.performance.now();
    if (stalled === null) {
      this.stalled = tnow;
      return;
    }
    var stalledDuration = tnow - stalled;
    if (!seeking && stalledDuration >= STALL_MINIMUM_DURATION_MS) {
      // Report stalling after trying to fix
      this._reportStall(bufferInfo);
      if (!this.media) {
        return;
      }
    }
    var bufferedWithHoles = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_0__.BufferHelper.bufferInfo(media, currentTime, config.maxBufferHole);
    this._tryFixBufferStall(bufferedWithHoles, stalledDuration);
  }

  /**
   * Detects and attempts to fix known buffer stalling issues.
   * @param bufferInfo - The properties of the current buffer.
   * @param stalledDurationMs - The amount of time Hls.js has been stalling for.
   * @private
   */;
  _proto._tryFixBufferStall = function _tryFixBufferStall(bufferInfo, stalledDurationMs) {
    var config = this.config,
      fragmentTracker = this.fragmentTracker,
      media = this.media;
    if (media === null) {
      return;
    }
    var currentTime = media.currentTime;
    var partial = fragmentTracker.getPartialFragment(currentTime);
    if (partial) {
      // Try to skip over the buffer hole caused by a partial fragment
      // This method isn't limited by the size of the gap between buffered ranges
      var targetTime = this._trySkipBufferHole(partial);
      // we return here in this case, meaning
      // the branch below only executes when we don't handle a partial fragment
      if (targetTime || !this.media) {
        return;
      }
    }

    // if we haven't had to skip over a buffer hole of a partial fragment
    // we may just have to "nudge" the playlist as the browser decoding/rendering engine
    // needs to cross some sort of threshold covering all source-buffers content
    // to start playing properly.
    if (bufferInfo.len > config.maxBufferHole && stalledDurationMs > config.highBufferWatchdogPeriod * 1000) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn('Trying to nudge playhead over buffer-hole');
      // Try to nudge currentTime over a buffer hole if we've been stalling for the configured amount of seconds
      // We only try to jump the hole if it's under the configured size
      // Reset stalled so to rearm watchdog timer
      this.stalled = null;
      this._tryNudgeBuffer();
    }
  }

  /**
   * Triggers a BUFFER_STALLED_ERROR event, but only once per stall period.
   * @param bufferLen - The playhead distance from the end of the current buffer segment.
   * @private
   */;
  _proto._reportStall = function _reportStall(bufferInfo) {
    var hls = this.hls,
      media = this.media,
      stallReported = this.stallReported;
    if (!stallReported && media) {
      // Report stalled error once
      this.stallReported = true;
      _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn("Playback stalling at @" + media.currentTime + " due to low buffer (" + JSON.stringify(bufferInfo) + ")");
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.MEDIA_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.BUFFER_STALLED_ERROR,
        fatal: false,
        buffer: bufferInfo.len
      });
    }
  }

  /**
   * Attempts to fix buffer stalls by jumping over known gaps caused by partial fragments
   * @param partial - The partial fragment found at the current time (where playback is stalling).
   * @private
   */;
  _proto._trySkipBufferHole = function _trySkipBufferHole(partial) {
    var config = this.config,
      hls = this.hls,
      media = this.media;
    if (media === null) {
      return 0;
    }
    var currentTime = media.currentTime;
    var lastEndTime = 0;
    // Check if currentTime is between unbuffered regions of partial fragments
    var buffered = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_0__.BufferHelper.getBuffered(media);
    for (var i = 0; i < buffered.length; i++) {
      var startTime = buffered.start(i);
      if (currentTime + config.maxBufferHole >= lastEndTime && currentTime < startTime) {
        var targetTime = Math.max(startTime + SKIP_BUFFER_RANGE_START, media.currentTime + SKIP_BUFFER_HOLE_STEP_SECONDS);
        _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn("skipping hole, adjusting currentTime from " + currentTime + " to " + targetTime);
        this.moved = true;
        this.stalled = null;
        media.currentTime = targetTime;
        if (partial) {
          hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.ERROR, {
            type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.MEDIA_ERROR,
            details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.BUFFER_SEEK_OVER_HOLE,
            fatal: false,
            reason: "fragment loaded with buffer holes, seeking from " + currentTime + " to " + targetTime,
            frag: partial
          });
        }
        return targetTime;
      }
      lastEndTime = buffered.end(i);
    }
    return 0;
  }

  /**
   * Attempts to fix buffer stalls by advancing the mediaElement's current time by a small amount.
   * @private
   */;
  _proto._tryNudgeBuffer = function _tryNudgeBuffer() {
    var config = this.config,
      hls = this.hls,
      media = this.media,
      nudgeRetry = this.nudgeRetry;
    if (media === null) {
      return;
    }
    var currentTime = media.currentTime;
    this.nudgeRetry++;
    if (nudgeRetry < config.nudgeMaxRetry) {
      var targetTime = currentTime + (nudgeRetry + 1) * config.nudgeOffset;
      // playback stalled in buffered area ... let's nudge currentTime to try to overcome this
      _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn("Nudging 'currentTime' from " + currentTime + " to " + targetTime);
      media.currentTime = targetTime;
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.MEDIA_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.BUFFER_NUDGE_ON_STALL,
        fatal: false
      });
    } else {
      _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.error("Playhead still not moving while enough data buffered @" + currentTime + " after " + config.nudgeMaxRetry + " nudges");
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.MEDIA_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.BUFFER_STALLED_ERROR,
        fatal: true
      });
    }
  };
  return GapController;
}();


/***/ }),

/***/ "./src/controller/id3-track-controller.ts":
/*!************************************************!*\
  !*** ./src/controller/id3-track-controller.ts ***!
  \************************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/texttrack-utils */ "./src/utils/texttrack-utils.ts");
/* harmony import */ var _demux_id3__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../demux/id3 */ "./src/demux/id3.ts");
/* harmony import */ var _loader_date_range__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../loader/date-range */ "./src/loader/date-range.ts");
/* harmony import */ var _types_demuxer__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../types/demuxer */ "./src/types/demuxer.ts");






var MIN_CUE_DURATION = 0.25;
function getCueClass() {
  // Attempt to recreate Safari functionality by creating
  // WebKitDataCue objects when available and store the decoded
  // ID3 data in the value property of the cue
  return self.WebKitDataCue || self.VTTCue || self.TextTrackCue;
}

// VTTCue latest draft allows an infinite duration, fallback
// to MAX_VALUE if necessary
var MAX_CUE_ENDTIME = function () {
  var Cue = getCueClass();
  try {
    new Cue(0, Number.POSITIVE_INFINITY, '');
  } catch (e) {
    return Number.MAX_VALUE;
  }
  return Number.POSITIVE_INFINITY;
}();
function dateRangeDateToTimelineSeconds(date, offset) {
  return date.getTime() / 1000 - offset;
}
function hexToArrayBuffer(str) {
  return Uint8Array.from(str.replace(/^0x/, '').replace(/([\da-fA-F]{2}) ?/g, '0x$1 ').replace(/ +$/, '').split(' ')).buffer;
}
var ID3TrackController = /*#__PURE__*/function () {
  function ID3TrackController(hls) {
    this.hls = void 0;
    this.id3Track = null;
    this.media = null;
    this.dateRangeCuesAppended = {};
    this.hls = hls;
    this._registerListeners();
  }
  var _proto = ID3TrackController.prototype;
  _proto.destroy = function destroy() {
    this._unregisterListeners();
    this.id3Track = null;
    this.media = null;
    this.dateRangeCuesAppended = {};
    // @ts-ignore
    this.hls = null;
  };
  _proto._registerListeners = function _registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_PARSING_METADATA, this.onFragParsingMetadata, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_UPDATED, this.onLevelUpdated, this);
  };
  _proto._unregisterListeners = function _unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_PARSING_METADATA, this.onFragParsingMetadata, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_UPDATED, this.onLevelUpdated, this);
  }

  // Add ID3 metatadata text track.
  ;
  _proto.onMediaAttached = function onMediaAttached(event, data) {
    this.media = data.media;
  };
  _proto.onMediaDetaching = function onMediaDetaching() {
    if (!this.id3Track) {
      return;
    }
    (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_2__.clearCurrentCues)(this.id3Track);
    this.id3Track = null;
    this.media = null;
    this.dateRangeCuesAppended = {};
  };
  _proto.onManifestLoading = function onManifestLoading() {
    this.dateRangeCuesAppended = {};
  };
  _proto.createTrack = function createTrack(media) {
    var track = this.getID3Track(media.textTracks);
    track.mode = 'hidden';
    return track;
  };
  _proto.getID3Track = function getID3Track(textTracks) {
    if (!this.media) {
      return;
    }
    for (var i = 0; i < textTracks.length; i++) {
      var textTrack = textTracks[i];
      if (textTrack.kind === 'metadata' && textTrack.label === 'id3') {
        // send 'addtrack' when reusing the textTrack for metadata,
        // same as what we do for captions
        (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_2__.sendAddTrackEvent)(textTrack, this.media);
        return textTrack;
      }
    }
    return this.media.addTextTrack('metadata', 'id3');
  };
  _proto.onFragParsingMetadata = function onFragParsingMetadata(event, data) {
    if (!this.media) {
      return;
    }
    var _this$hls$config = this.hls.config,
      enableEmsgMetadataCues = _this$hls$config.enableEmsgMetadataCues,
      enableID3MetadataCues = _this$hls$config.enableID3MetadataCues;
    if (!enableEmsgMetadataCues && !enableID3MetadataCues) {
      return;
    }
    var samples = data.samples;

    // create track dynamically
    if (!this.id3Track) {
      this.id3Track = this.createTrack(this.media);
    }
    var Cue = getCueClass();
    for (var i = 0; i < samples.length; i++) {
      var type = samples[i].type;
      if (type === _types_demuxer__WEBPACK_IMPORTED_MODULE_5__.MetadataSchema.emsg && !enableEmsgMetadataCues || !enableID3MetadataCues) {
        continue;
      }
      var frames = _demux_id3__WEBPACK_IMPORTED_MODULE_3__.getID3Frames(samples[i].data);
      if (frames) {
        var startTime = samples[i].pts;
        var endTime = startTime + samples[i].duration;
        if (endTime > MAX_CUE_ENDTIME) {
          endTime = MAX_CUE_ENDTIME;
        }
        var timeDiff = endTime - startTime;
        if (timeDiff <= 0) {
          endTime = startTime + MIN_CUE_DURATION;
        }
        for (var j = 0; j < frames.length; j++) {
          var frame = frames[j];
          // Safari doesn't put the timestamp frame in the TextTrack
          if (!_demux_id3__WEBPACK_IMPORTED_MODULE_3__.isTimeStampFrame(frame)) {
            // add a bounds to any unbounded cues
            this.updateId3CueEnds(startTime);
            var cue = new Cue(startTime, endTime, '');
            cue.value = frame;
            if (type) {
              cue.type = type;
            }
            this.id3Track.addCue(cue);
          }
        }
      }
    }
  };
  _proto.updateId3CueEnds = function updateId3CueEnds(startTime) {
    var _this$id3Track;
    var cues = (_this$id3Track = this.id3Track) === null || _this$id3Track === void 0 ? void 0 : _this$id3Track.cues;
    if (cues) {
      for (var i = cues.length; i--;) {
        var cue = cues[i];
        if (cue.startTime < startTime && cue.endTime === MAX_CUE_ENDTIME) {
          cue.endTime = startTime;
        }
      }
    }
  };
  _proto.onBufferFlushing = function onBufferFlushing(event, _ref) {
    var startOffset = _ref.startOffset,
      endOffset = _ref.endOffset,
      type = _ref.type;
    var id3Track = this.id3Track,
      hls = this.hls;
    if (!hls) {
      return;
    }
    var _hls$config = hls.config,
      enableEmsgMetadataCues = _hls$config.enableEmsgMetadataCues,
      enableID3MetadataCues = _hls$config.enableID3MetadataCues;
    if (id3Track && (enableEmsgMetadataCues || enableID3MetadataCues)) {
      var predicate;
      if (type === 'audio') {
        predicate = function predicate(cue) {
          return cue.type === _types_demuxer__WEBPACK_IMPORTED_MODULE_5__.MetadataSchema.audioId3 && enableID3MetadataCues;
        };
      } else if (type === 'video') {
        predicate = function predicate(cue) {
          return cue.type === _types_demuxer__WEBPACK_IMPORTED_MODULE_5__.MetadataSchema.emsg && enableEmsgMetadataCues;
        };
      } else {
        predicate = function predicate(cue) {
          return cue.type === _types_demuxer__WEBPACK_IMPORTED_MODULE_5__.MetadataSchema.audioId3 && enableID3MetadataCues || cue.type === _types_demuxer__WEBPACK_IMPORTED_MODULE_5__.MetadataSchema.emsg && enableEmsgMetadataCues;
        };
      }
      (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_2__.removeCuesInRange)(id3Track, startOffset, endOffset, predicate);
    }
  };
  _proto.onLevelUpdated = function onLevelUpdated(event, _ref2) {
    var _this = this;
    var details = _ref2.details;
    if (!this.media || !details.hasProgramDateTime || !this.hls.config.enableDateRangeMetadataCues) {
      return;
    }
    var dateRangeCuesAppended = this.dateRangeCuesAppended,
      id3Track = this.id3Track;
    var dateRanges = details.dateRanges;
    var ids = Object.keys(dateRanges);
    // Remove cues from track not found in details.dateRanges
    if (id3Track) {
      var idsToRemove = Object.keys(dateRangeCuesAppended).filter(function (id) {
        return !ids.includes(id);
      });
      var _loop = function _loop(i) {
        var id = idsToRemove[i];
        Object.keys(dateRangeCuesAppended[id].cues).forEach(function (key) {
          id3Track.removeCue(dateRangeCuesAppended[id].cues[key]);
        });
        delete dateRangeCuesAppended[id];
      };
      for (var i = idsToRemove.length; i--;) {
        _loop(i);
      }
    }
    // Exit if the playlist does not have Date Ranges or does not have Program Date Time
    var lastFragment = details.fragments[details.fragments.length - 1];
    if (ids.length === 0 || !(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(lastFragment === null || lastFragment === void 0 ? void 0 : lastFragment.programDateTime)) {
      return;
    }
    if (!this.id3Track) {
      this.id3Track = this.createTrack(this.media);
    }
    var dateTimeOffset = lastFragment.programDateTime / 1000 - lastFragment.start;
    var Cue = getCueClass();
    var _loop2 = function _loop2(_i) {
      var id = ids[_i];
      var dateRange = dateRanges[id];
      var appendedDateRangeCues = dateRangeCuesAppended[id];
      var cues = (appendedDateRangeCues === null || appendedDateRangeCues === void 0 ? void 0 : appendedDateRangeCues.cues) || {};
      var durationKnown = (appendedDateRangeCues === null || appendedDateRangeCues === void 0 ? void 0 : appendedDateRangeCues.durationKnown) || false;
      var startTime = dateRangeDateToTimelineSeconds(dateRange.startDate, dateTimeOffset);
      var endTime = MAX_CUE_ENDTIME;
      var endDate = dateRange.endDate;
      if (endDate) {
        endTime = dateRangeDateToTimelineSeconds(endDate, dateTimeOffset);
        durationKnown = true;
      } else if (dateRange.endOnNext && !durationKnown) {
        var nextDateRangeWithSameClass = ids.reduce(function (filterMapArray, id) {
          var candidate = dateRanges[id];
          if (candidate.class === dateRange.class && candidate.id !== id && candidate.startDate > dateRange.startDate) {
            filterMapArray.push(candidate);
          }
          return filterMapArray;
        }, []).sort(function (a, b) {
          return a.startDate.getTime() - b.startDate.getTime();
        })[0];
        if (nextDateRangeWithSameClass) {
          endTime = dateRangeDateToTimelineSeconds(nextDateRangeWithSameClass.startDate, dateTimeOffset);
          durationKnown = true;
        }
      }
      var attributes = Object.keys(dateRange.attr);
      for (var j = 0; j < attributes.length; j++) {
        var key = attributes[j];
        if (key === _loader_date_range__WEBPACK_IMPORTED_MODULE_4__.DateRangeAttribute.ID || key === _loader_date_range__WEBPACK_IMPORTED_MODULE_4__.DateRangeAttribute.CLASS || key === _loader_date_range__WEBPACK_IMPORTED_MODULE_4__.DateRangeAttribute.START_DATE || key === _loader_date_range__WEBPACK_IMPORTED_MODULE_4__.DateRangeAttribute.DURATION || key === _loader_date_range__WEBPACK_IMPORTED_MODULE_4__.DateRangeAttribute.END_DATE || key === _loader_date_range__WEBPACK_IMPORTED_MODULE_4__.DateRangeAttribute.END_ON_NEXT) {
          continue;
        }
        var cue = cues[key];
        if (cue) {
          if (durationKnown && !appendedDateRangeCues.durationKnown) {
            cue.endTime = endTime;
          }
        } else {
          var data = dateRange.attr[key];
          cue = new Cue(startTime, endTime, '');
          if (key === _loader_date_range__WEBPACK_IMPORTED_MODULE_4__.DateRangeAttribute.SCTE35_OUT || key === _loader_date_range__WEBPACK_IMPORTED_MODULE_4__.DateRangeAttribute.SCTE35_IN) {
            data = hexToArrayBuffer(data);
          }
          cue.value = {
            key: key,
            data: data
          };
          cue.type = _types_demuxer__WEBPACK_IMPORTED_MODULE_5__.MetadataSchema.dateRange;
          _this.id3Track.addCue(cue);
          cues[key] = cue;
        }
      }
      dateRangeCuesAppended[id] = {
        cues: cues,
        dateRange: dateRange,
        durationKnown: durationKnown
      };
    };
    for (var _i = 0; _i < ids.length; _i++) {
      _loop2(_i);
    }
  };
  return ID3TrackController;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (ID3TrackController);

/***/ }),

/***/ "./src/controller/latency-controller.ts":
/*!**********************************************!*\
  !*** ./src/controller/latency-controller.ts ***!
  \**********************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ LatencyController)
/* harmony export */ });
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }



var LatencyController = /*#__PURE__*/function () {
  function LatencyController(hls) {
    var _this = this;
    this.hls = void 0;
    this.config = void 0;
    this.media = null;
    this.levelDetails = null;
    this.currentTime = 0;
    this.stallCount = 0;
    this._latency = null;
    this.timeupdateHandler = function () {
      return _this.timeupdate();
    };
    this.hls = hls;
    this.config = hls.config;
    this.registerListeners();
  }
  var _proto = LatencyController.prototype;
  _proto.destroy = function destroy() {
    this.unregisterListeners();
    this.onMediaDetaching();
    this.levelDetails = null;
    // @ts-ignore
    this.hls = this.timeupdateHandler = null;
  };
  _proto.registerListeners = function registerListeners() {
    this.hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    this.hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    this.hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    this.hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_UPDATED, this.onLevelUpdated, this);
    this.hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, this.onError, this);
  };
  _proto.unregisterListeners = function unregisterListeners() {
    this.hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_ATTACHED, this.onMediaAttached);
    this.hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_DETACHING, this.onMediaDetaching);
    this.hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADING, this.onManifestLoading);
    this.hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_UPDATED, this.onLevelUpdated);
    this.hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, this.onError);
  };
  _proto.onMediaAttached = function onMediaAttached(event, data) {
    this.media = data.media;
    this.media.addEventListener('timeupdate', this.timeupdateHandler);
  };
  _proto.onMediaDetaching = function onMediaDetaching() {
    if (this.media) {
      this.media.removeEventListener('timeupdate', this.timeupdateHandler);
      this.media = null;
    }
  };
  _proto.onManifestLoading = function onManifestLoading() {
    this.levelDetails = null;
    this._latency = null;
    this.stallCount = 0;
  };
  _proto.onLevelUpdated = function onLevelUpdated(event, _ref) {
    var details = _ref.details;
    this.levelDetails = details;
    if (details.advanced) {
      this.timeupdate();
    }
    if (!details.live && this.media) {
      this.media.removeEventListener('timeupdate', this.timeupdateHandler);
    }
  };
  _proto.onError = function onError(event, data) {
    if (data.details !== _errors__WEBPACK_IMPORTED_MODULE_0__.ErrorDetails.BUFFER_STALLED_ERROR) {
      return;
    }
    this.stallCount++;
    _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn('[playback-rate-controller]: Stall detected, adjusting target latency');
  };
  _proto.timeupdate = function timeupdate() {
    var media = this.media,
      levelDetails = this.levelDetails;
    if (!media || !levelDetails) {
      return;
    }
    this.currentTime = media.currentTime;
    var latency = this.computeLatency();
    if (latency === null) {
      return;
    }
    this._latency = latency;

    // Adapt playbackRate to meet target latency in low-latency mode
    var _this$config = this.config,
      lowLatencyMode = _this$config.lowLatencyMode,
      maxLiveSyncPlaybackRate = _this$config.maxLiveSyncPlaybackRate;
    if (!lowLatencyMode || maxLiveSyncPlaybackRate === 1) {
      return;
    }
    var targetLatency = this.targetLatency;
    if (targetLatency === null) {
      return;
    }
    var distanceFromTarget = latency - targetLatency;
    // Only adjust playbackRate when within one target duration of targetLatency
    // and more than one second from under-buffering.
    // Playback further than one target duration from target can be considered DVR playback.
    var liveMinLatencyDuration = Math.min(this.maxLatency, targetLatency + levelDetails.targetduration);
    var inLiveRange = distanceFromTarget < liveMinLatencyDuration;
    if (levelDetails.live && inLiveRange && distanceFromTarget > 0.05 && this.forwardBufferLength > 1) {
      var max = Math.min(2, Math.max(1.0, maxLiveSyncPlaybackRate));
      var rate = Math.round(2 / (1 + Math.exp(-0.75 * distanceFromTarget - this.edgeStalled)) * 20) / 20;
      media.playbackRate = Math.min(max, Math.max(1, rate));
    } else if (media.playbackRate !== 1 && media.playbackRate !== 0) {
      media.playbackRate = 1;
    }
  };
  _proto.estimateLiveEdge = function estimateLiveEdge() {
    var levelDetails = this.levelDetails;
    if (levelDetails === null) {
      return null;
    }
    return levelDetails.edge + levelDetails.age;
  };
  _proto.computeLatency = function computeLatency() {
    var liveEdge = this.estimateLiveEdge();
    if (liveEdge === null) {
      return null;
    }
    return liveEdge - this.currentTime;
  };
  _createClass(LatencyController, [{
    key: "latency",
    get: function get() {
      return this._latency || 0;
    }
  }, {
    key: "maxLatency",
    get: function get() {
      var config = this.config,
        levelDetails = this.levelDetails;
      if (config.liveMaxLatencyDuration !== undefined) {
        return config.liveMaxLatencyDuration;
      }
      return levelDetails ? config.liveMaxLatencyDurationCount * levelDetails.targetduration : 0;
    }
  }, {
    key: "targetLatency",
    get: function get() {
      var levelDetails = this.levelDetails;
      if (levelDetails === null) {
        return null;
      }
      var holdBack = levelDetails.holdBack,
        partHoldBack = levelDetails.partHoldBack,
        targetduration = levelDetails.targetduration;
      var _this$config2 = this.config,
        liveSyncDuration = _this$config2.liveSyncDuration,
        liveSyncDurationCount = _this$config2.liveSyncDurationCount,
        lowLatencyMode = _this$config2.lowLatencyMode;
      var userConfig = this.hls.userConfig;
      var targetLatency = lowLatencyMode ? partHoldBack || holdBack : holdBack;
      if (userConfig.liveSyncDuration || userConfig.liveSyncDurationCount || targetLatency === 0) {
        targetLatency = liveSyncDuration !== undefined ? liveSyncDuration : liveSyncDurationCount * targetduration;
      }
      var maxLiveSyncOnStallIncrease = targetduration;
      var liveSyncOnStallIncrease = 1.0;
      return targetLatency + Math.min(this.stallCount * liveSyncOnStallIncrease, maxLiveSyncOnStallIncrease);
    }
  }, {
    key: "liveSyncPosition",
    get: function get() {
      var liveEdge = this.estimateLiveEdge();
      var targetLatency = this.targetLatency;
      var levelDetails = this.levelDetails;
      if (liveEdge === null || targetLatency === null || levelDetails === null) {
        return null;
      }
      var edge = levelDetails.edge;
      var syncPosition = liveEdge - targetLatency - this.edgeStalled;
      var min = edge - levelDetails.totalduration;
      var max = edge - (this.config.lowLatencyMode && levelDetails.partTarget || levelDetails.targetduration);
      return Math.min(Math.max(min, syncPosition), max);
    }
  }, {
    key: "drift",
    get: function get() {
      var levelDetails = this.levelDetails;
      if (levelDetails === null) {
        return 1;
      }
      return levelDetails.drift;
    }
  }, {
    key: "edgeStalled",
    get: function get() {
      var levelDetails = this.levelDetails;
      if (levelDetails === null) {
        return 0;
      }
      var maxLevelUpdateAge = (this.config.lowLatencyMode && levelDetails.partTarget || levelDetails.targetduration) * 3;
      return Math.max(levelDetails.age - maxLevelUpdateAge, 0);
    }
  }, {
    key: "forwardBufferLength",
    get: function get() {
      var media = this.media,
        levelDetails = this.levelDetails;
      if (!media || !levelDetails) {
        return 0;
      }
      var bufferedRanges = media.buffered.length;
      return (bufferedRanges ? media.buffered.end(bufferedRanges - 1) : levelDetails.edge) - this.currentTime;
    }
  }]);
  return LatencyController;
}();


/***/ }),

/***/ "./src/controller/level-controller.ts":
/*!********************************************!*\
  !*** ./src/controller/level-controller.ts ***!
  \********************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ LevelController)
/* harmony export */ });
/* harmony import */ var _types_level__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../types/level */ "./src/types/level.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _utils_codecs__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/codecs */ "./src/utils/codecs.ts");
/* harmony import */ var _level_helper__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ./level-helper */ "./src/controller/level-helper.ts");
/* harmony import */ var _base_playlist_controller__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ./base-playlist-controller */ "./src/controller/base-playlist-controller.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");
function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
/*
 * Level Controller
 */








var chromeOrFirefox = /chrome|firefox/.test(navigator.userAgent.toLowerCase());
var LevelController = /*#__PURE__*/function (_BasePlaylistControll) {
  _inheritsLoose(LevelController, _BasePlaylistControll);
  function LevelController(hls) {
    var _this;
    _this = _BasePlaylistControll.call(this, hls, '[level-controller]') || this;
    _this._levels = [];
    _this._firstLevel = -1;
    _this._startLevel = void 0;
    _this.currentLevelIndex = -1;
    _this.manualLevelIndex = -1;
    _this.onParsedComplete = void 0;
    _this._registerListeners();
    return _this;
  }
  var _proto = LevelController.prototype;
  _proto._registerListeners = function _registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADED, this.onManifestLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_LOADED, this.onLevelLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.AUDIO_TRACK_SWITCHED, this.onAudioTrackSwitched, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_LOADED, this.onFragLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, this.onError, this);
  };
  _proto._unregisterListeners = function _unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADED, this.onManifestLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_LOADED, this.onLevelLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.AUDIO_TRACK_SWITCHED, this.onAudioTrackSwitched, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_LOADED, this.onFragLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, this.onError, this);
  };
  _proto.destroy = function destroy() {
    this._unregisterListeners();
    this.manualLevelIndex = -1;
    this._levels.length = 0;
    _BasePlaylistControll.prototype.destroy.call(this);
  };
  _proto.startLoad = function startLoad() {
    var levels = this._levels;

    // clean up live level details to force reload them, and reset load errors
    levels.forEach(function (level) {
      level.loadError = 0;
    });
    _BasePlaylistControll.prototype.startLoad.call(this);
  };
  _proto.onManifestLoaded = function onManifestLoaded(event, data) {
    var levels = [];
    var audioTracks = [];
    var subtitleTracks = [];
    var bitrateStart;
    var levelSet = {};
    var levelFromSet;
    var resolutionFound = false;
    var videoCodecFound = false;
    var audioCodecFound = false;

    // regroup redundant levels together
    data.levels.forEach(function (levelParsed) {
      var attributes = levelParsed.attrs;
      resolutionFound = resolutionFound || !!(levelParsed.width && levelParsed.height);
      videoCodecFound = videoCodecFound || !!levelParsed.videoCodec;
      audioCodecFound = audioCodecFound || !!levelParsed.audioCodec;

      // erase audio codec info if browser does not support mp4a.40.34.
      // demuxer will autodetect codec and fallback to mpeg/audio
      if (chromeOrFirefox && levelParsed.audioCodec && levelParsed.audioCodec.indexOf('mp4a.40.34') !== -1) {
        levelParsed.audioCodec = undefined;
      }
      var levelKey = levelParsed.bitrate + "-" + levelParsed.attrs.RESOLUTION + "-" + levelParsed.attrs.CODECS;
      levelFromSet = levelSet[levelKey];
      if (!levelFromSet) {
        levelFromSet = new _types_level__WEBPACK_IMPORTED_MODULE_0__.Level(levelParsed);
        levelSet[levelKey] = levelFromSet;
        levels.push(levelFromSet);
      } else {
        levelFromSet.url.push(levelParsed.url);
      }
      if (attributes) {
        if (attributes.AUDIO) {
          (0,_level_helper__WEBPACK_IMPORTED_MODULE_4__.addGroupId)(levelFromSet, 'audio', attributes.AUDIO);
        }
        if (attributes.SUBTITLES) {
          (0,_level_helper__WEBPACK_IMPORTED_MODULE_4__.addGroupId)(levelFromSet, 'text', attributes.SUBTITLES);
        }
      }
    });

    // remove audio-only level if we also have levels with video codecs or RESOLUTION signalled
    if ((resolutionFound || videoCodecFound) && audioCodecFound) {
      levels = levels.filter(function (_ref) {
        var videoCodec = _ref.videoCodec,
          width = _ref.width,
          height = _ref.height;
        return !!videoCodec || !!(width && height);
      });
    }

    // only keep levels with supported audio/video codecs
    levels = levels.filter(function (_ref2) {
      var audioCodec = _ref2.audioCodec,
        videoCodec = _ref2.videoCodec;
      return (!audioCodec || (0,_utils_codecs__WEBPACK_IMPORTED_MODULE_3__.isCodecSupportedInMp4)(audioCodec, 'audio')) && (!videoCodec || (0,_utils_codecs__WEBPACK_IMPORTED_MODULE_3__.isCodecSupportedInMp4)(videoCodec, 'video'));
    });
    if (data.audioTracks) {
      audioTracks = data.audioTracks.filter(function (track) {
        return !track.audioCodec || (0,_utils_codecs__WEBPACK_IMPORTED_MODULE_3__.isCodecSupportedInMp4)(track.audioCodec, 'audio');
      });
      // Assign ids after filtering as array indices by group-id
      (0,_level_helper__WEBPACK_IMPORTED_MODULE_4__.assignTrackIdsByGroup)(audioTracks);
    }
    if (data.subtitles) {
      subtitleTracks = data.subtitles;
      (0,_level_helper__WEBPACK_IMPORTED_MODULE_4__.assignTrackIdsByGroup)(subtitleTracks);
    }
    if (levels.length > 0) {
      // start bitrate is the first bitrate of the manifest
      bitrateStart = levels[0].bitrate;
      // sort levels from lowest to highest
      levels.sort(function (a, b) {
        if (a.attrs['HDCP-LEVEL'] !== b.attrs['HDCP-LEVEL']) {
          return (a.attrs['HDCP-LEVEL'] || '') > (b.attrs['HDCP-LEVEL'] || '') ? 1 : -1;
        }
        if (a.bitrate !== b.bitrate) {
          return a.bitrate - b.bitrate;
        }
        if (a.attrs.SCORE !== b.attrs.SCORE) {
          return a.attrs.decimalFloatingPoint('SCORE') - b.attrs.decimalFloatingPoint('SCORE');
        }
        if (resolutionFound && a.height !== b.height) {
          return a.height - b.height;
        }
        return 0;
      });
      this._levels = levels;
      // find index of first level in sorted levels
      for (var i = 0; i < levels.length; i++) {
        if (levels[i].bitrate === bitrateStart) {
          this._firstLevel = i;
          this.log("manifest loaded, " + levels.length + " level(s) found, first bitrate: " + bitrateStart);
          break;
        }
      }

      // Audio is only alternate if manifest include a URI along with the audio group tag,
      // and this is not an audio-only stream where levels contain audio-only
      var audioOnly = audioCodecFound && !videoCodecFound;
      var edata = {
        levels: levels,
        audioTracks: audioTracks,
        subtitleTracks: subtitleTracks,
        sessionData: data.sessionData,
        sessionKeys: data.sessionKeys,
        firstLevel: this._firstLevel,
        stats: data.stats,
        audio: audioCodecFound,
        video: videoCodecFound,
        altAudio: !audioOnly && audioTracks.some(function (t) {
          return !!t.url;
        })
      };
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_PARSED, edata);

      // Initiate loading after all controllers have received MANIFEST_PARSED
      if (this.hls.config.autoStartLoad || this.hls.forceStartLoad) {
        this.hls.startLoad(this.hls.config.startPosition);
      }
    } else {
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorTypes.MEDIA_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.MANIFEST_INCOMPATIBLE_CODECS_ERROR,
        fatal: true,
        url: data.url,
        reason: 'no level with compatible codecs found in manifest'
      });
    }
  };
  _proto.onError = function onError(event, data) {
    var _data$frag, _data$level;
    _BasePlaylistControll.prototype.onError.call(this, event, data);
    if (data.fatal) {
      return;
    }

    // Switch to redundant level when track fails to load
    var context = data.context;
    var level = this._levels[this.currentLevelIndex];
    if (context && (context.type === _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistContextType.AUDIO_TRACK && level.audioGroupIds && context.groupId === level.audioGroupIds[level.urlId] || context.type === _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistContextType.SUBTITLE_TRACK && level.textGroupIds && context.groupId === level.textGroupIds[level.urlId])) {
      this.redundantFailover(this.currentLevelIndex);
      return;
    }
    var levelError = false;
    var levelSwitch = true;
    var levelIndex;

    // try to recover not fatal errors
    switch (data.details) {
      case _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.FRAG_LOAD_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.FRAG_LOAD_TIMEOUT:
      case _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.KEY_LOAD_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.KEY_LOAD_TIMEOUT:
        if (data.frag) {
          // Share fragment error count accross media options (main, audio, subs)
          // This allows for level based rendition switching when media option assets fail
          var variantLevelIndex = data.frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN ? data.frag.level : this.currentLevelIndex;
          var _level = this._levels[variantLevelIndex];
          // Set levelIndex when we're out of fragment retries
          if (_level) {
            _level.fragmentError++;
            if (_level.fragmentError > this.hls.config.fragLoadingMaxRetry) {
              levelIndex = variantLevelIndex;
            }
          } else {
            levelIndex = variantLevelIndex;
          }
        }
        break;
      case _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.KEY_SYSTEM_STATUS_OUTPUT_RESTRICTED:
        {
          var restrictedHdcpLevel = level.attrs['HDCP-LEVEL'];
          if (restrictedHdcpLevel) {
            this.hls.maxHdcpLevel = _types_level__WEBPACK_IMPORTED_MODULE_0__.HdcpLevels[_types_level__WEBPACK_IMPORTED_MODULE_0__.HdcpLevels.indexOf(restrictedHdcpLevel) - 1];
            this.warn("Restricting playback to HDCP-LEVEL of \"" + this.hls.maxHdcpLevel + "\" or lower");
          }
        }
      // eslint-disable-next-line no-fallthrough
      case _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.FRAG_PARSING_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.KEY_SYSTEM_NO_SESSION:
        levelIndex = ((_data$frag = data.frag) === null || _data$frag === void 0 ? void 0 : _data$frag.type) === _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN ? data.frag.level : this.currentLevelIndex;
        // Do not retry level. Escalate to fatal if switching levels fails.
        data.levelRetry = false;
        break;
      case _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.LEVEL_LOAD_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.LEVEL_LOAD_TIMEOUT:
        // Do not perform level switch if an error occurred using delivery directives
        // Attempt to reload level without directives first
        if (context) {
          if (context.deliveryDirectives) {
            levelSwitch = false;
          }
          levelIndex = context.level;
        }
        levelError = true;
        break;
      case _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.REMUX_ALLOC_ERROR:
        levelIndex = (_data$level = data.level) != null ? _data$level : this.currentLevelIndex;
        levelError = true;
        break;
    }
    if (levelIndex !== undefined) {
      this.recoverLevel(data, levelIndex, levelError, levelSwitch);
    }
  }

  /**
   * Switch to a redundant stream if any available.
   * If redundant stream is not available, emergency switch down if ABR mode is enabled.
   */;
  _proto.recoverLevel = function recoverLevel(errorEvent, levelIndex, levelError, levelSwitch) {
    var errorDetails = errorEvent.details;
    var level = this._levels[levelIndex];
    level.loadError++;
    if (levelError) {
      var retrying = this.retryLoadingOrFail(errorEvent);
      if (retrying) {
        // boolean used to inform stream controller not to switch back to IDLE on non fatal error
        errorEvent.levelRetry = true;
      } else {
        this.currentLevelIndex = -1;
        return;
      }
    }
    if (levelSwitch) {
      var redundantLevels = level.url.length;
      // Try redundant fail-over until level.loadError reaches redundantLevels
      if (redundantLevels > 1 && level.loadError < redundantLevels) {
        errorEvent.levelRetry = true;
        this.redundantFailover(levelIndex);
      } else if (this.manualLevelIndex === -1) {
        // Search for next level to retry
        var nextLevel = -1;
        var levels = this._levels;
        for (var i = levels.length; i--;) {
          var candidate = (i + this.currentLevelIndex) % levels.length;
          if (candidate !== this.currentLevelIndex && levels[candidate].loadError === 0) {
            nextLevel = candidate;
            break;
          }
        }
        if (nextLevel > -1 && this.currentLevelIndex !== nextLevel) {
          this.warn(errorDetails + ": switch to " + nextLevel);
          errorEvent.levelRetry = true;
          this.hls.nextAutoLevel = nextLevel;
        } else if (errorEvent.levelRetry === false) {
          // No levels to switch to and no more retries
          errorEvent.fatal = true;
        }
      }
    }
  };
  _proto.redundantFailover = function redundantFailover(levelIndex) {
    var level = this._levels[levelIndex];
    var redundantLevels = level.url.length;
    if (redundantLevels > 1) {
      // Update the url id of all levels so that we stay on the same set of variants when level switching
      var newUrlId = (level.urlId + 1) % redundantLevels;
      this.warn("Switching to redundant URL-id " + newUrlId);
      this._levels.forEach(function (level) {
        level.urlId = newUrlId;
      });
      this.level = levelIndex;
    }
  }

  // reset errors on the successful load of a fragment
  ;
  _proto.onFragLoaded = function onFragLoaded(event, _ref3) {
    var frag = _ref3.frag;
    if (frag !== undefined && frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN) {
      var level = this._levels[frag.level];
      if (level !== undefined) {
        level.fragmentError = 0;
        level.loadError = 0;
      }
    }
  };
  _proto.onLevelLoaded = function onLevelLoaded(event, data) {
    var _data$deliveryDirecti2;
    var level = data.level,
      details = data.details;
    var curLevel = this._levels[level];
    if (!curLevel) {
      var _data$deliveryDirecti;
      this.warn("Invalid level index " + level);
      if ((_data$deliveryDirecti = data.deliveryDirectives) !== null && _data$deliveryDirecti !== void 0 && _data$deliveryDirecti.skip) {
        details.deltaUpdateFailed = true;
      }
      return;
    }

    // only process level loaded events matching with expected level
    if (level === this.currentLevelIndex) {
      // reset level load error counter on successful level loaded only if there is no issues with fragments
      if (curLevel.fragmentError === 0) {
        curLevel.loadError = 0;
        this.retryCount = 0;
      }
      this.playlistLoaded(level, data, curLevel.details);
    } else if ((_data$deliveryDirecti2 = data.deliveryDirectives) !== null && _data$deliveryDirecti2 !== void 0 && _data$deliveryDirecti2.skip) {
      // received a delta playlist update that cannot be merged
      details.deltaUpdateFailed = true;
    }
  };
  _proto.onAudioTrackSwitched = function onAudioTrackSwitched(event, data) {
    var currentLevel = this.hls.levels[this.currentLevelIndex];
    if (!currentLevel) {
      return;
    }
    if (currentLevel.audioGroupIds) {
      var urlId = -1;
      var audioGroupId = this.hls.audioTracks[data.id].groupId;
      for (var i = 0; i < currentLevel.audioGroupIds.length; i++) {
        if (currentLevel.audioGroupIds[i] === audioGroupId) {
          urlId = i;
          break;
        }
      }
      if (urlId !== currentLevel.urlId) {
        currentLevel.urlId = urlId;
        this.startLoad();
      }
    }
  };
  _proto.loadPlaylist = function loadPlaylist(hlsUrlParameters) {
    _BasePlaylistControll.prototype.loadPlaylist.call(this);
    var level = this.currentLevelIndex;
    var currentLevel = this._levels[level];
    if (this.canLoad && currentLevel && currentLevel.url.length > 0) {
      var id = currentLevel.urlId;
      var url = currentLevel.url[id];
      if (hlsUrlParameters) {
        try {
          url = hlsUrlParameters.addDirectives(url);
        } catch (error) {
          this.warn("Could not construct new URL with HLS Delivery Directives: " + error);
        }
      }
      this.log("Attempt loading level index " + level + ((hlsUrlParameters === null || hlsUrlParameters === void 0 ? void 0 : hlsUrlParameters.msn) !== undefined ? ' at sn ' + hlsUrlParameters.msn + ' part ' + hlsUrlParameters.part : '') + " with URL-id " + id + " " + url);

      // console.log('Current audio track group ID:', this.hls.audioTracks[this.hls.audioTrack].groupId);
      // console.log('New video quality level audio group id:', levelObject.attrs.AUDIO, level);
      this.clearTimer();
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_LOADING, {
        url: url,
        level: level,
        id: id,
        deliveryDirectives: hlsUrlParameters || null
      });
    }
  };
  _proto.removeLevel = function removeLevel(levelIndex, urlId) {
    var filterLevelAndGroupByIdIndex = function filterLevelAndGroupByIdIndex(url, id) {
      return id !== urlId;
    };
    var levels = this._levels.filter(function (level, index) {
      if (index !== levelIndex) {
        return true;
      }
      if (level.url.length > 1 && urlId !== undefined) {
        level.url = level.url.filter(filterLevelAndGroupByIdIndex);
        if (level.audioGroupIds) {
          level.audioGroupIds = level.audioGroupIds.filter(filterLevelAndGroupByIdIndex);
        }
        if (level.textGroupIds) {
          level.textGroupIds = level.textGroupIds.filter(filterLevelAndGroupByIdIndex);
        }
        level.urlId = 0;
        return true;
      }
      return false;
    }).map(function (level, index) {
      var details = level.details;
      if (details !== null && details !== void 0 && details.fragments) {
        details.fragments.forEach(function (fragment) {
          fragment.level = index;
        });
      }
      return level;
    });
    this._levels = levels;
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVELS_UPDATED, {
      levels: levels
    });
  };
  _createClass(LevelController, [{
    key: "levels",
    get: function get() {
      if (this._levels.length === 0) {
        return null;
      }
      return this._levels;
    }
  }, {
    key: "level",
    get: function get() {
      return this.currentLevelIndex;
    },
    set: function set(newLevel) {
      var _levels$newLevel;
      var levels = this._levels;
      if (levels.length === 0) {
        return;
      }
      if (this.currentLevelIndex === newLevel && (_levels$newLevel = levels[newLevel]) !== null && _levels$newLevel !== void 0 && _levels$newLevel.details) {
        return;
      }
      // check if level idx is valid
      if (newLevel < 0 || newLevel >= levels.length) {
        // invalid level id given, trigger error
        var fatal = newLevel < 0;
        this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, {
          type: _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorTypes.OTHER_ERROR,
          details: _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.LEVEL_SWITCH_ERROR,
          level: newLevel,
          fatal: fatal,
          reason: 'invalid level idx'
        });
        if (fatal) {
          return;
        }
        newLevel = Math.min(newLevel, levels.length - 1);
      }

      // stopping live reloading timer if any
      this.clearTimer();
      var lastLevelIndex = this.currentLevelIndex;
      var lastLevel = levels[lastLevelIndex];
      var level = levels[newLevel];
      this.log("switching to level " + newLevel + " from " + lastLevelIndex);
      this.currentLevelIndex = newLevel;
      var levelSwitchingData = _extends({}, level, {
        level: newLevel,
        maxBitrate: level.maxBitrate,
        uri: level.uri,
        urlId: level.urlId
      });
      // @ts-ignore
      delete levelSwitchingData._urlId;
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_SWITCHING, levelSwitchingData);
      // check if we need to load playlist for this level
      var levelDetails = level.details;
      if (!levelDetails || levelDetails.live) {
        // level not retrieved yet, or live playlist we need to (re)load it
        var hlsUrlParameters = this.switchParams(level.uri, lastLevel === null || lastLevel === void 0 ? void 0 : lastLevel.details);
        this.loadPlaylist(hlsUrlParameters);
      }
    }
  }, {
    key: "manualLevel",
    get: function get() {
      return this.manualLevelIndex;
    },
    set: function set(newLevel) {
      this.manualLevelIndex = newLevel;
      if (this._startLevel === undefined) {
        this._startLevel = newLevel;
      }
      if (newLevel !== -1) {
        this.level = newLevel;
      }
    }
  }, {
    key: "firstLevel",
    get: function get() {
      return this._firstLevel;
    },
    set: function set(newLevel) {
      this._firstLevel = newLevel;
    }
  }, {
    key: "startLevel",
    get: function get() {
      // hls.startLevel takes precedence over config.startLevel
      // if none of these values are defined, fallback on this._firstLevel (first quality level appearing in variant manifest)
      if (this._startLevel === undefined) {
        var configStartLevel = this.hls.config.startLevel;
        if (configStartLevel !== undefined) {
          return configStartLevel;
        } else {
          return this._firstLevel;
        }
      } else {
        return this._startLevel;
      }
    },
    set: function set(newLevel) {
      this._startLevel = newLevel;
    }
  }, {
    key: "nextLoadLevel",
    get: function get() {
      if (this.manualLevelIndex !== -1) {
        return this.manualLevelIndex;
      } else {
        return this.hls.nextAutoLevel;
      }
    },
    set: function set(nextLevel) {
      this.level = nextLevel;
      if (this.manualLevelIndex === -1) {
        this.hls.nextAutoLevel = nextLevel;
      }
    }
  }]);
  return LevelController;
}(_base_playlist_controller__WEBPACK_IMPORTED_MODULE_5__["default"]);


/***/ }),

/***/ "./src/controller/level-helper.ts":
/*!****************************************!*\
  !*** ./src/controller/level-helper.ts ***!
  \****************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "addGroupId": () => (/* binding */ addGroupId),
/* harmony export */   "addSliding": () => (/* binding */ addSliding),
/* harmony export */   "adjustSliding": () => (/* binding */ adjustSliding),
/* harmony export */   "assignTrackIdsByGroup": () => (/* binding */ assignTrackIdsByGroup),
/* harmony export */   "computeReloadInterval": () => (/* binding */ computeReloadInterval),
/* harmony export */   "getFragmentWithSN": () => (/* binding */ getFragmentWithSN),
/* harmony export */   "getPartWith": () => (/* binding */ getPartWith),
/* harmony export */   "mapFragmentIntersection": () => (/* binding */ mapFragmentIntersection),
/* harmony export */   "mapPartIntersection": () => (/* binding */ mapPartIntersection),
/* harmony export */   "mergeDetails": () => (/* binding */ mergeDetails),
/* harmony export */   "updateFragPTSDTS": () => (/* binding */ updateFragPTSDTS),
/* harmony export */   "updatePTS": () => (/* binding */ updatePTS)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _loader_date_range__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../loader/date-range */ "./src/loader/date-range.ts");





function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
/**
 * @module LevelHelper
 * Providing methods dealing with playlist sliding and drift
 * */



function addGroupId(level, type, id) {
  switch (type) {
    case 'audio':
      if (!level.audioGroupIds) {
        level.audioGroupIds = [];
      }
      level.audioGroupIds.push(id);
      break;
    case 'text':
      if (!level.textGroupIds) {
        level.textGroupIds = [];
      }
      level.textGroupIds.push(id);
      break;
  }
}
function assignTrackIdsByGroup(tracks) {
  var groups = {};
  tracks.forEach(function (track) {
    var groupId = track.groupId || '';
    track.id = groups[groupId] = groups[groupId] || 0;
    groups[groupId]++;
  });
}
function updatePTS(fragments, fromIdx, toIdx) {
  var fragFrom = fragments[fromIdx];
  var fragTo = fragments[toIdx];
  updateFromToPTS(fragFrom, fragTo);
}
function updateFromToPTS(fragFrom, fragTo) {
  var fragToPTS = fragTo.startPTS;
  // if we know startPTS[toIdx]
  if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(fragToPTS)) {
    // update fragment duration.
    // it helps to fix drifts between playlist reported duration and fragment real duration
    var duration = 0;
    var frag;
    if (fragTo.sn > fragFrom.sn) {
      duration = fragToPTS - fragFrom.start;
      frag = fragFrom;
    } else {
      duration = fragFrom.start - fragToPTS;
      frag = fragTo;
    }
    // TODO? Drift can go either way, or the playlist could be completely accurate
    // console.assert(duration > 0,
    //   `duration of ${duration} computed for frag ${frag.sn}, level ${frag.level}, there should be some duration drift between playlist and fragment!`);
    if (frag.duration !== duration) {
      frag.duration = duration;
    }
    // we dont know startPTS[toIdx]
  } else if (fragTo.sn > fragFrom.sn) {
    var contiguous = fragFrom.cc === fragTo.cc;
    // TODO: With part-loading end/durations we need to confirm the whole fragment is loaded before using (or setting) minEndPTS
    if (contiguous && fragFrom.minEndPTS) {
      fragTo.start = fragFrom.start + (fragFrom.minEndPTS - fragFrom.start);
    } else {
      fragTo.start = fragFrom.start + fragFrom.duration;
    }
  } else {
    fragTo.start = Math.max(fragFrom.start - fragTo.duration, 0);
  }
}
function updateFragPTSDTS(details, frag, startPTS, endPTS, startDTS, endDTS) {
  var parsedMediaDuration = endPTS - startPTS;
  if (parsedMediaDuration <= 0) {
    _utils_logger__WEBPACK_IMPORTED_MODULE_1__.logger.warn('Fragment should have a positive duration', frag);
    endPTS = startPTS + frag.duration;
    endDTS = startDTS + frag.duration;
  }
  var maxStartPTS = startPTS;
  var minEndPTS = endPTS;
  var fragStartPts = frag.startPTS;
  var fragEndPts = frag.endPTS;
  if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(fragStartPts)) {
    // delta PTS between audio and video
    var deltaPTS = Math.abs(fragStartPts - startPTS);
    if (!(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(frag.deltaPTS)) {
      frag.deltaPTS = deltaPTS;
    } else {
      frag.deltaPTS = Math.max(deltaPTS, frag.deltaPTS);
    }
    maxStartPTS = Math.max(startPTS, fragStartPts);
    startPTS = Math.min(startPTS, fragStartPts);
    startDTS = Math.min(startDTS, frag.startDTS);
    minEndPTS = Math.min(endPTS, fragEndPts);
    endPTS = Math.max(endPTS, fragEndPts);
    endDTS = Math.max(endDTS, frag.endDTS);
  }
  frag.duration = endPTS - startPTS;
  var drift = startPTS - frag.start;
  frag.start = frag.startPTS = startPTS;
  frag.maxStartPTS = maxStartPTS;
  frag.startDTS = startDTS;
  frag.endPTS = endPTS;
  frag.minEndPTS = minEndPTS;
  frag.endDTS = endDTS;
  var sn = frag.sn; // 'initSegment'
  // exit if sn out of range
  if (!details || sn < details.startSN || sn > details.endSN) {
    return 0;
  }
  var i;
  var fragIdx = sn - details.startSN;
  var fragments = details.fragments;
  // update frag reference in fragments array
  // rationale is that fragments array might not contain this frag object.
  // this will happen if playlist has been refreshed between frag loading and call to updateFragPTSDTS()
  // if we don't update frag, we won't be able to propagate PTS info on the playlist
  // resulting in invalid sliding computation
  fragments[fragIdx] = frag;
  // adjust fragment PTS/duration from seqnum-1 to frag 0
  for (i = fragIdx; i > 0; i--) {
    updateFromToPTS(fragments[i], fragments[i - 1]);
  }

  // adjust fragment PTS/duration from seqnum to last frag
  for (i = fragIdx; i < fragments.length - 1; i++) {
    updateFromToPTS(fragments[i], fragments[i + 1]);
  }
  if (details.fragmentHint) {
    updateFromToPTS(fragments[fragments.length - 1], details.fragmentHint);
  }
  details.PTSKnown = details.alignedSliding = true;
  return drift;
}
function mergeDetails(oldDetails, newDetails) {
  // Track the last initSegment processed. Initialize it to the last one on the timeline.
  var currentInitSegment = null;
  var oldFragments = oldDetails.fragments;
  for (var i = oldFragments.length - 1; i >= 0; i--) {
    var oldInit = oldFragments[i].initSegment;
    if (oldInit) {
      currentInitSegment = oldInit;
      break;
    }
  }
  if (oldDetails.fragmentHint) {
    // prevent PTS and duration from being adjusted on the next hint
    delete oldDetails.fragmentHint.endPTS;
  }
  // check if old/new playlists have fragments in common
  // loop through overlapping SN and update startPTS , cc, and duration if any found
  var ccOffset = 0;
  var PTSFrag;
  mapFragmentIntersection(oldDetails, newDetails, function (oldFrag, newFrag) {
    if (oldFrag.relurl) {
      // Do not compare CC if the old fragment has no url. This is a level.fragmentHint used by LL-HLS parts.
      // It maybe be off by 1 if it was created before any parts or discontinuity tags were appended to the end
      // of the playlist.
      ccOffset = oldFrag.cc - newFrag.cc;
    }
    if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(oldFrag.startPTS) && (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(oldFrag.endPTS)) {
      newFrag.start = newFrag.startPTS = oldFrag.startPTS;
      newFrag.startDTS = oldFrag.startDTS;
      newFrag.appendedPTS = oldFrag.appendedPTS;
      newFrag.maxStartPTS = oldFrag.maxStartPTS;
      newFrag.endPTS = oldFrag.endPTS;
      newFrag.endDTS = oldFrag.endDTS;
      newFrag.minEndPTS = oldFrag.minEndPTS;
      newFrag.duration = oldFrag.endPTS - oldFrag.startPTS;
      if (newFrag.duration) {
        PTSFrag = newFrag;
      }

      // PTS is known when any segment has startPTS and endPTS
      newDetails.PTSKnown = newDetails.alignedSliding = true;
    }
    newFrag.elementaryStreams = oldFrag.elementaryStreams;
    newFrag.loader = oldFrag.loader;
    newFrag.stats = oldFrag.stats;
    newFrag.urlId = oldFrag.urlId;
    if (oldFrag.initSegment) {
      newFrag.initSegment = oldFrag.initSegment;
      currentInitSegment = oldFrag.initSegment;
    }
  });
  if (currentInitSegment) {
    var fragmentsToCheck = newDetails.fragmentHint ? newDetails.fragments.concat(newDetails.fragmentHint) : newDetails.fragments;
    fragmentsToCheck.forEach(function (frag) {
      var _currentInitSegment;
      if (!frag.initSegment || frag.initSegment.relurl === ((_currentInitSegment = currentInitSegment) === null || _currentInitSegment === void 0 ? void 0 : _currentInitSegment.relurl)) {
        frag.initSegment = currentInitSegment;
      }
    });
  }
  if (newDetails.skippedSegments) {
    newDetails.deltaUpdateFailed = newDetails.fragments.some(function (frag) {
      return !frag;
    });
    if (newDetails.deltaUpdateFailed) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_1__.logger.warn('[level-helper] Previous playlist missing segments skipped in delta playlist');
      for (var _i = newDetails.skippedSegments; _i--;) {
        newDetails.fragments.shift();
      }
      newDetails.startSN = newDetails.fragments[0].sn;
      newDetails.startCC = newDetails.fragments[0].cc;
    } else if (newDetails.canSkipDateRanges) {
      newDetails.dateRanges = mergeDateRanges(oldDetails.dateRanges, newDetails.dateRanges, newDetails.recentlyRemovedDateranges);
    }
  }
  var newFragments = newDetails.fragments;
  if (ccOffset) {
    _utils_logger__WEBPACK_IMPORTED_MODULE_1__.logger.warn('discontinuity sliding from playlist, take drift into account');
    for (var _i2 = 0; _i2 < newFragments.length; _i2++) {
      newFragments[_i2].cc += ccOffset;
    }
  }
  if (newDetails.skippedSegments) {
    newDetails.startCC = newDetails.fragments[0].cc;
  }

  // Merge parts
  mapPartIntersection(oldDetails.partList, newDetails.partList, function (oldPart, newPart) {
    newPart.elementaryStreams = oldPart.elementaryStreams;
    newPart.stats = oldPart.stats;
  });

  // if at least one fragment contains PTS info, recompute PTS information for all fragments
  if (PTSFrag) {
    updateFragPTSDTS(newDetails, PTSFrag, PTSFrag.startPTS, PTSFrag.endPTS, PTSFrag.startDTS, PTSFrag.endDTS);
  } else {
    // ensure that delta is within oldFragments range
    // also adjust sliding in case delta is 0 (we could have old=[50-60] and new=old=[50-61])
    // in that case we also need to adjust start offset of all fragments
    adjustSliding(oldDetails, newDetails);
  }
  if (newFragments.length) {
    newDetails.totalduration = newDetails.edge - newFragments[0].start;
  }
  newDetails.driftStartTime = oldDetails.driftStartTime;
  newDetails.driftStart = oldDetails.driftStart;
  var advancedDateTime = newDetails.advancedDateTime;
  if (newDetails.advanced && advancedDateTime) {
    var edge = newDetails.edge;
    if (!newDetails.driftStart) {
      newDetails.driftStartTime = advancedDateTime;
      newDetails.driftStart = edge;
    }
    newDetails.driftEndTime = advancedDateTime;
    newDetails.driftEnd = edge;
  } else {
    newDetails.driftEndTime = oldDetails.driftEndTime;
    newDetails.driftEnd = oldDetails.driftEnd;
    newDetails.advancedDateTime = oldDetails.advancedDateTime;
  }
}
function mergeDateRanges(oldDateRanges, deltaDateRanges, recentlyRemovedDateranges) {
  var dateRanges = _extends({}, oldDateRanges);
  if (recentlyRemovedDateranges) {
    recentlyRemovedDateranges.forEach(function (id) {
      delete dateRanges[id];
    });
  }
  Object.keys(deltaDateRanges).forEach(function (id) {
    var dateRange = new _loader_date_range__WEBPACK_IMPORTED_MODULE_2__.DateRange(deltaDateRanges[id].attr, dateRanges[id]);
    if (dateRange.isValid) {
      dateRanges[id] = dateRange;
    } else {
      _utils_logger__WEBPACK_IMPORTED_MODULE_1__.logger.warn("Ignoring invalid Playlist Delta Update DATERANGE tag: \"" + JSON.stringify(deltaDateRanges[id].attr) + "\"");
    }
  });
  return dateRanges;
}
function mapPartIntersection(oldParts, newParts, intersectionFn) {
  if (oldParts && newParts) {
    var delta = 0;
    for (var i = 0, len = oldParts.length; i <= len; i++) {
      var _oldPart = oldParts[i];
      var _newPart = newParts[i + delta];
      if (_oldPart && _newPart && _oldPart.index === _newPart.index && _oldPart.fragment.sn === _newPart.fragment.sn) {
        intersectionFn(_oldPart, _newPart);
      } else {
        delta--;
      }
    }
  }
}
function mapFragmentIntersection(oldDetails, newDetails, intersectionFn) {
  var skippedSegments = newDetails.skippedSegments;
  var start = Math.max(oldDetails.startSN, newDetails.startSN) - newDetails.startSN;
  var end = (oldDetails.fragmentHint ? 1 : 0) + (skippedSegments ? newDetails.endSN : Math.min(oldDetails.endSN, newDetails.endSN)) - newDetails.startSN;
  var delta = newDetails.startSN - oldDetails.startSN;
  var newFrags = newDetails.fragmentHint ? newDetails.fragments.concat(newDetails.fragmentHint) : newDetails.fragments;
  var oldFrags = oldDetails.fragmentHint ? oldDetails.fragments.concat(oldDetails.fragmentHint) : oldDetails.fragments;
  for (var i = start; i <= end; i++) {
    var _oldFrag = oldFrags[delta + i];
    var _newFrag = newFrags[i];
    if (skippedSegments && !_newFrag && i < skippedSegments) {
      // Fill in skipped segments in delta playlist
      _newFrag = newDetails.fragments[i] = _oldFrag;
    }
    if (_oldFrag && _newFrag) {
      intersectionFn(_oldFrag, _newFrag);
    }
  }
}
function adjustSliding(oldDetails, newDetails) {
  var delta = newDetails.startSN + newDetails.skippedSegments - oldDetails.startSN;
  var oldFragments = oldDetails.fragments;
  if (delta < 0 || delta >= oldFragments.length) {
    return;
  }
  addSliding(newDetails, oldFragments[delta].start);
}
function addSliding(details, start) {
  if (start) {
    var fragments = details.fragments;
    for (var i = details.skippedSegments; i < fragments.length; i++) {
      fragments[i].start += start;
    }
    if (details.fragmentHint) {
      details.fragmentHint.start += start;
    }
  }
}
function computeReloadInterval(newDetails, distanceToLiveEdgeMs) {
  if (distanceToLiveEdgeMs === void 0) {
    distanceToLiveEdgeMs = Infinity;
  }
  var reloadInterval = 1000 * newDetails.targetduration;
  if (newDetails.updated) {
    // Use last segment duration when shorter than target duration and near live edge
    var fragments = newDetails.fragments;
    var liveEdgeMaxTargetDurations = 4;
    if (fragments.length && reloadInterval * liveEdgeMaxTargetDurations > distanceToLiveEdgeMs) {
      var lastSegmentDuration = fragments[fragments.length - 1].duration * 1000;
      if (lastSegmentDuration < reloadInterval) {
        reloadInterval = lastSegmentDuration;
      }
    }
  } else {
    // estimate = 'miss half average';
    // follow HLS Spec, If the client reloads a Playlist file and finds that it has not
    // changed then it MUST wait for a period of one-half the target
    // duration before retrying.
    reloadInterval /= 2;
  }
  return Math.round(reloadInterval);
}
function getFragmentWithSN(level, sn, fragCurrent) {
  if (!level || !level.details) {
    return null;
  }
  var levelDetails = level.details;
  var fragment = levelDetails.fragments[sn - levelDetails.startSN];
  if (fragment) {
    return fragment;
  }
  fragment = levelDetails.fragmentHint;
  if (fragment && fragment.sn === sn) {
    return fragment;
  }
  if (sn < levelDetails.startSN && fragCurrent && fragCurrent.sn === sn) {
    return fragCurrent;
  }
  return null;
}
function getPartWith(level, sn, partIndex) {
  if (!level || !level.details) {
    return null;
  }
  var partList = level.details.partList;
  if (partList) {
    for (var i = partList.length; i--;) {
      var part = partList[i];
      if (part.index === partIndex && part.fragment.sn === sn) {
        return part;
      }
    }
  }
  return null;
}

/***/ }),

/***/ "./src/controller/stream-controller.ts":
/*!*********************************************!*\
  !*** ./src/controller/stream-controller.ts ***!
  \*********************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ StreamController)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./base-stream-controller */ "./src/controller/base-stream-controller.ts");
/* harmony import */ var _is_supported__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../is-supported */ "./src/is-supported.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../utils/buffer-helper */ "./src/utils/buffer-helper.ts");
/* harmony import */ var _fragment_tracker__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ./fragment-tracker */ "./src/controller/fragment-tracker.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");
/* harmony import */ var _loader_fragment__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ../loader/fragment */ "./src/loader/fragment.ts");
/* harmony import */ var _demux_transmuxer_interface__WEBPACK_IMPORTED_MODULE_8__ = __webpack_require__(/*! ../demux/transmuxer-interface */ "./src/demux/transmuxer-interface.ts");
/* harmony import */ var _types_transmuxer__WEBPACK_IMPORTED_MODULE_9__ = __webpack_require__(/*! ../types/transmuxer */ "./src/types/transmuxer.ts");
/* harmony import */ var _gap_controller__WEBPACK_IMPORTED_MODULE_10__ = __webpack_require__(/*! ./gap-controller */ "./src/controller/gap-controller.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_11__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");




function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }











var TICK_INTERVAL = 100; // how often to tick in ms
var StreamController = /*#__PURE__*/function (_BaseStreamController) {
  _inheritsLoose(StreamController, _BaseStreamController);
  function StreamController(hls, fragmentTracker, keyLoader) {
    var _this;
    _this = _BaseStreamController.call(this, hls, fragmentTracker, keyLoader, '[stream-controller]') || this;
    _this.audioCodecSwap = false;
    _this.gapController = null;
    _this.level = -1;
    _this._forceStartLoad = false;
    _this.altAudio = false;
    _this.audioOnly = false;
    _this.fragPlaying = null;
    _this.onvplaying = null;
    _this.onvseeked = null;
    _this.fragLastKbps = 0;
    _this.couldBacktrack = false;
    _this.backtrackFragment = null;
    _this.audioCodecSwitch = false;
    _this.videoBuffer = null;
    _this._registerListeners();
    return _this;
  }
  var _proto = StreamController.prototype;
  _proto._registerListeners = function _registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.MANIFEST_PARSED, this.onManifestParsed, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.LEVEL_LOADING, this.onLevelLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.LEVEL_LOADED, this.onLevelLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.FRAG_LOAD_EMERGENCY_ABORTED, this.onFragLoadEmergencyAborted, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.ERROR, this.onError, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.AUDIO_TRACK_SWITCHING, this.onAudioTrackSwitching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.AUDIO_TRACK_SWITCHED, this.onAudioTrackSwitched, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.BUFFER_CREATED, this.onBufferCreated, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.BUFFER_FLUSHED, this.onBufferFlushed, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_3__.Events.FRAG_BUFFERED, this.onFragBuffered, this);
  };
  _proto._unregisterListeners = function _unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.MANIFEST_PARSED, this.onManifestParsed, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.LEVEL_LOADED, this.onLevelLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.FRAG_LOAD_EMERGENCY_ABORTED, this.onFragLoadEmergencyAborted, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.ERROR, this.onError, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.AUDIO_TRACK_SWITCHING, this.onAudioTrackSwitching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.AUDIO_TRACK_SWITCHED, this.onAudioTrackSwitched, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.BUFFER_CREATED, this.onBufferCreated, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.BUFFER_FLUSHED, this.onBufferFlushed, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_3__.Events.FRAG_BUFFERED, this.onFragBuffered, this);
  };
  _proto.onHandlerDestroying = function onHandlerDestroying() {
    this._unregisterListeners();
    this.onMediaDetaching();
  };
  _proto.startLoad = function startLoad(startPosition) {
    if (this.levels) {
      var lastCurrentTime = this.lastCurrentTime,
        hls = this.hls;
      this.stopLoad();
      this.setInterval(TICK_INTERVAL);
      this.level = -1;
      this.fragLoadError = 0;
      if (!this.startFragRequested) {
        // determine load level
        var startLevel = hls.startLevel;
        if (startLevel === -1) {
          if (hls.config.testBandwidth && this.levels.length > 1) {
            // -1 : guess start Level by doing a bitrate test by loading first fragment of lowest quality level
            startLevel = 0;
            this.bitrateTest = true;
          } else {
            startLevel = hls.nextAutoLevel;
          }
        }
        // set new level to playlist loader : this will trigger start level load
        // hls.nextLoadLevel remains until it is set to a new value or until a new frag is successfully loaded
        this.level = hls.nextLoadLevel = startLevel;
        this.loadedmetadata = false;
      }
      // if startPosition undefined but lastCurrentTime set, set startPosition to last currentTime
      if (lastCurrentTime > 0 && startPosition === -1) {
        this.log("Override startPosition with lastCurrentTime @" + lastCurrentTime.toFixed(3));
        startPosition = lastCurrentTime;
      }
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
      this.nextLoadPosition = this.startPosition = this.lastCurrentTime = startPosition;
      this.tick();
    } else {
      this._forceStartLoad = true;
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.STOPPED;
    }
  };
  _proto.stopLoad = function stopLoad() {
    this._forceStartLoad = false;
    _BaseStreamController.prototype.stopLoad.call(this);
  };
  _proto.doTick = function doTick() {
    switch (this.state) {
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE:
        this.doTickIdle();
        break;
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_LEVEL:
        {
          var _levels$level;
          var levels = this.levels,
            level = this.level;
          var details = levels === null || levels === void 0 ? void 0 : (_levels$level = levels[level]) === null || _levels$level === void 0 ? void 0 : _levels$level.details;
          if (details && (!details.live || this.levelLastLoaded === this.level)) {
            if (this.waitForCdnTuneIn(details)) {
              break;
            }
            this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
            break;
          }
          break;
        }
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.FRAG_LOADING_WAITING_RETRY:
        {
          var _this$media;
          var now = self.performance.now();
          var retryDate = this.retryDate;
          // if current time is gt than retryDate, or if media seeking let's switch to IDLE state to retry loading
          if (!retryDate || now >= retryDate || (_this$media = this.media) !== null && _this$media !== void 0 && _this$media.seeking) {
            this.log('retryDate reached, switch back to IDLE state');
            this.resetStartWhenNotLoaded(this.level);
            this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
          }
        }
        break;
      default:
        break;
    }
    // check buffer
    // check/update current fragment
    this.onTickEnd();
  };
  _proto.onTickEnd = function onTickEnd() {
    _BaseStreamController.prototype.onTickEnd.call(this);
    this.checkBuffer();
    this.checkFragmentChanged();
  };
  _proto.doTickIdle = function doTickIdle() {
    var hls = this.hls,
      levelLastLoaded = this.levelLastLoaded,
      levels = this.levels,
      media = this.media;
    var config = hls.config,
      level = hls.nextLoadLevel;

    // if start level not parsed yet OR
    // if video not attached AND start fragment already requested OR start frag prefetch not enabled
    // exit loop, as we either need more info (level not parsed) or we need media to be attached to load new fragment
    if (levelLastLoaded === null || !media && (this.startFragRequested || !config.startFragPrefetch)) {
      return;
    }

    // If the "main" level is audio-only but we are loading an alternate track in the same group, do not load anything
    if (this.altAudio && this.audioOnly) {
      return;
    }
    if (!levels || !levels[level]) {
      return;
    }
    var levelInfo = levels[level];

    // if buffer length is less than maxBufLen try to load a new fragment

    var bufferInfo = this.getMainFwdBufferInfo();
    if (bufferInfo === null) {
      return;
    }
    var lastDetails = this.getLevelDetails();
    if (lastDetails && this._streamEnded(bufferInfo, lastDetails)) {
      var data = {};
      if (this.altAudio) {
        data.type = 'video';
      }
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.BUFFER_EOS, data);
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.ENDED;
      return;
    }

    // set next load level : this will trigger a playlist load if needed
    this.level = hls.nextLoadLevel = level;
    var levelDetails = levelInfo.details;
    // if level info not retrieved yet, switch state and wait for level retrieval
    // if live playlist, ensure that new playlist has been refreshed to avoid loading/try to load
    // a useless and outdated fragment (that might even introduce load error if it is already out of the live playlist)
    if (!levelDetails || this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_LEVEL || levelDetails.live && this.levelLastLoaded !== level) {
      this.level = level;
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_LEVEL;
      return;
    }
    var bufferLen = bufferInfo.len;

    // compute max Buffer Length that we could get from this load level, based on level bitrate. don't buffer more than 60 MB and more than 30s
    var maxBufLen = this.getMaxBufferLength(levelInfo.maxBitrate);

    // Stay idle if we are still with buffer margins
    if (bufferLen >= maxBufLen) {
      return;
    }
    if (this.backtrackFragment && this.backtrackFragment.start > bufferInfo.end) {
      this.backtrackFragment = null;
    }
    var targetBufferTime = this.backtrackFragment ? this.backtrackFragment.start : bufferInfo.end;
    var frag = this.getNextFragment(targetBufferTime, levelDetails);
    // Avoid backtracking by loading an earlier segment in streams with segments that do not start with a key frame (flagged by `couldBacktrack`)
    if (this.couldBacktrack && !this.fragPrevious && frag && frag.sn !== 'initSegment' && this.fragmentTracker.getState(frag) !== _fragment_tracker__WEBPACK_IMPORTED_MODULE_5__.FragmentState.OK) {
      var _this$backtrackFragme;
      var backtrackSn = ((_this$backtrackFragme = this.backtrackFragment) != null ? _this$backtrackFragme : frag).sn;
      var fragIdx = backtrackSn - levelDetails.startSN;
      var backtrackFrag = levelDetails.fragments[fragIdx - 1];
      if (backtrackFrag && frag.cc === backtrackFrag.cc) {
        frag = backtrackFrag;
        this.fragmentTracker.removeFragment(backtrackFrag);
      }
    } else if (this.backtrackFragment && bufferInfo.len) {
      this.backtrackFragment = null;
    }
    // Avoid loop loading by using nextLoadPosition set for backtracking
    if (frag && this.fragmentTracker.getState(frag) === _fragment_tracker__WEBPACK_IMPORTED_MODULE_5__.FragmentState.OK && this.nextLoadPosition > targetBufferTime) {
      // Cleanup the fragment tracker before trying to find the next unbuffered fragment
      var type = this.audioOnly && !this.altAudio ? _loader_fragment__WEBPACK_IMPORTED_MODULE_7__.ElementaryStreamTypes.AUDIO : _loader_fragment__WEBPACK_IMPORTED_MODULE_7__.ElementaryStreamTypes.VIDEO;
      var mediaBuffer = (type === _loader_fragment__WEBPACK_IMPORTED_MODULE_7__.ElementaryStreamTypes.VIDEO ? this.videoBuffer : this.mediaBuffer) || this.media;
      if (mediaBuffer) {
        this.afterBufferFlushed(mediaBuffer, type, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN);
      }
      frag = this.getNextFragment(this.nextLoadPosition, levelDetails);
    }
    if (!frag) {
      return;
    }
    if (frag.initSegment && !frag.initSegment.data && !this.bitrateTest) {
      frag = frag.initSegment;
    }
    this.loadFragment(frag, levelDetails, targetBufferTime);
  };
  _proto.loadFragment = function loadFragment(frag, levelDetails, targetBufferTime) {
    var _this$media2;
    // Check if fragment is not loaded
    var fragState = this.fragmentTracker.getState(frag);
    this.fragCurrent = frag;
    if (fragState === _fragment_tracker__WEBPACK_IMPORTED_MODULE_5__.FragmentState.NOT_LOADED) {
      if (frag.sn === 'initSegment') {
        this._loadInitSegment(frag, levelDetails);
      } else if (this.bitrateTest) {
        this.log("Fragment " + frag.sn + " of level " + frag.level + " is being downloaded to test bitrate and will not be buffered");
        this._loadBitrateTestFrag(frag, levelDetails);
      } else {
        this.startFragRequested = true;
        _BaseStreamController.prototype.loadFragment.call(this, frag, levelDetails, targetBufferTime);
      }
    } else if (fragState === _fragment_tracker__WEBPACK_IMPORTED_MODULE_5__.FragmentState.APPENDING) {
      // Lower the buffer size and try again
      if (this.reduceMaxBufferLength(frag.duration)) {
        this.fragmentTracker.removeFragment(frag);
      }
    } else if (((_this$media2 = this.media) === null || _this$media2 === void 0 ? void 0 : _this$media2.buffered.length) === 0) {
      // Stop gap for bad tracker / buffer flush behavior
      this.fragmentTracker.removeAllFragments();
    }
  };
  _proto.getAppendedFrag = function getAppendedFrag(position) {
    var fragOrPart = this.fragmentTracker.getAppendedFrag(position, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN);
    if (fragOrPart && 'fragment' in fragOrPart) {
      return fragOrPart.fragment;
    }
    return fragOrPart;
  };
  _proto.getBufferedFrag = function getBufferedFrag(position) {
    return this.fragmentTracker.getBufferedFrag(position, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN);
  };
  _proto.followingBufferedFrag = function followingBufferedFrag(frag) {
    if (frag) {
      // try to get range of next fragment (500ms after this range)
      return this.getBufferedFrag(frag.end + 0.5);
    }
    return null;
  }

  /*
    on immediate level switch :
     - pause playback if playing
     - cancel any pending load request
     - and trigger a buffer flush
  */;
  _proto.immediateLevelSwitch = function immediateLevelSwitch() {
    this.abortCurrentFrag();
    this.flushMainBuffer(0, Number.POSITIVE_INFINITY);
  }

  /**
   * try to switch ASAP without breaking video playback:
   * in order to ensure smooth but quick level switching,
   * we need to find the next flushable buffer range
   * we should take into account new segment fetch time
   */;
  _proto.nextLevelSwitch = function nextLevelSwitch() {
    var levels = this.levels,
      media = this.media;
    // ensure that media is defined and that metadata are available (to retrieve currentTime)
    if (media !== null && media !== void 0 && media.readyState) {
      var fetchdelay;
      var fragPlayingCurrent = this.getAppendedFrag(media.currentTime);
      if (fragPlayingCurrent && fragPlayingCurrent.start > 1) {
        // flush buffer preceding current fragment (flush until current fragment start offset)
        // minus 1s to avoid video freezing, that could happen if we flush keyframe of current video ...
        this.flushMainBuffer(0, fragPlayingCurrent.start - 1);
      }
      if (!media.paused && levels) {
        // add a safety delay of 1s
        var nextLevelId = this.hls.nextLoadLevel;
        var nextLevel = levels[nextLevelId];
        var fragLastKbps = this.fragLastKbps;
        if (fragLastKbps && this.fragCurrent) {
          fetchdelay = this.fragCurrent.duration * nextLevel.maxBitrate / (1000 * fragLastKbps) + 1;
        } else {
          fetchdelay = 0;
        }
      } else {
        fetchdelay = 0;
      }
      // this.log('fetchdelay:'+fetchdelay);
      // find buffer range that will be reached once new fragment will be fetched
      var bufferedFrag = this.getBufferedFrag(media.currentTime + fetchdelay);
      if (bufferedFrag) {
        // we can flush buffer range following this one without stalling playback
        var nextBufferedFrag = this.followingBufferedFrag(bufferedFrag);
        if (nextBufferedFrag) {
          // if we are here, we can also cancel any loading/demuxing in progress, as they are useless
          this.abortCurrentFrag();
          // start flush position is in next buffered frag. Leave some padding for non-independent segments and smoother playback.
          var maxStart = nextBufferedFrag.maxStartPTS ? nextBufferedFrag.maxStartPTS : nextBufferedFrag.start;
          var fragDuration = nextBufferedFrag.duration;
          var startPts = Math.max(bufferedFrag.end, maxStart + Math.min(Math.max(fragDuration - this.config.maxFragLookUpTolerance, fragDuration * 0.5), fragDuration * 0.75));
          this.flushMainBuffer(startPts, Number.POSITIVE_INFINITY);
        }
      }
    }
  };
  _proto.abortCurrentFrag = function abortCurrentFrag() {
    var fragCurrent = this.fragCurrent;
    this.fragCurrent = null;
    this.backtrackFragment = null;
    if (fragCurrent) {
      fragCurrent.abortRequests();
    }
    switch (this.state) {
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.KEY_LOADING:
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.FRAG_LOADING:
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.FRAG_LOADING_WAITING_RETRY:
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.PARSING:
      case _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.PARSED:
        this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
        break;
    }
    this.nextLoadPosition = this.getLoadPosition();
  };
  _proto.flushMainBuffer = function flushMainBuffer(startOffset, endOffset) {
    _BaseStreamController.prototype.flushMainBuffer.call(this, startOffset, endOffset, this.altAudio ? 'video' : null);
  };
  _proto.onMediaAttached = function onMediaAttached(event, data) {
    _BaseStreamController.prototype.onMediaAttached.call(this, event, data);
    var media = data.media;
    this.onvplaying = this.onMediaPlaying.bind(this);
    this.onvseeked = this.onMediaSeeked.bind(this);
    media.addEventListener('playing', this.onvplaying);
    media.addEventListener('seeked', this.onvseeked);
    this.gapController = new _gap_controller__WEBPACK_IMPORTED_MODULE_10__["default"](this.config, media, this.fragmentTracker, this.hls);
  };
  _proto.onMediaDetaching = function onMediaDetaching() {
    var media = this.media;
    if (media && this.onvplaying && this.onvseeked) {
      media.removeEventListener('playing', this.onvplaying);
      media.removeEventListener('seeked', this.onvseeked);
      this.onvplaying = this.onvseeked = null;
      this.videoBuffer = null;
    }
    this.fragPlaying = null;
    if (this.gapController) {
      this.gapController.destroy();
      this.gapController = null;
    }
    _BaseStreamController.prototype.onMediaDetaching.call(this);
  };
  _proto.onMediaPlaying = function onMediaPlaying() {
    // tick to speed up FRAG_CHANGED triggering
    this.tick();
  };
  _proto.onMediaSeeked = function onMediaSeeked() {
    var media = this.media;
    var currentTime = media ? media.currentTime : null;
    if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(currentTime)) {
      this.log("Media seeked to " + currentTime.toFixed(3));
    }

    // tick to speed up FRAG_CHANGED triggering
    this.tick();
  };
  _proto.onManifestLoading = function onManifestLoading() {
    // reset buffer on manifest loading
    this.log('Trigger BUFFER_RESET');
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.BUFFER_RESET, undefined);
    this.fragmentTracker.removeAllFragments();
    this.couldBacktrack = false;
    this.startPosition = this.lastCurrentTime = 0;
    this.fragPlaying = null;
    this.backtrackFragment = null;
  };
  _proto.onManifestParsed = function onManifestParsed(event, data) {
    var aac = false;
    var heaac = false;
    var codec;
    data.levels.forEach(function (level) {
      // detect if we have different kind of audio codecs used amongst playlists
      codec = level.audioCodec;
      if (codec) {
        if (codec.indexOf('mp4a.40.2') !== -1) {
          aac = true;
        }
        if (codec.indexOf('mp4a.40.5') !== -1) {
          heaac = true;
        }
      }
    });
    this.audioCodecSwitch = aac && heaac && !(0,_is_supported__WEBPACK_IMPORTED_MODULE_2__.changeTypeSupported)();
    if (this.audioCodecSwitch) {
      this.log('Both AAC/HE-AAC audio found in levels; declaring level codec as HE-AAC');
    }
    this.levels = data.levels;
    this.startFragRequested = false;
  };
  _proto.onLevelLoading = function onLevelLoading(event, data) {
    var levels = this.levels;
    if (!levels || this.state !== _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE) {
      return;
    }
    var level = levels[data.level];
    if (!level.details || level.details.live && this.levelLastLoaded !== data.level || this.waitForCdnTuneIn(level.details)) {
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_LEVEL;
    }
  };
  _proto.onLevelLoaded = function onLevelLoaded(event, data) {
    var _curLevel$details;
    var levels = this.levels;
    var newLevelId = data.level;
    var newDetails = data.details;
    var duration = newDetails.totalduration;
    if (!levels) {
      this.warn("Levels were reset while loading level " + newLevelId);
      return;
    }
    this.log("Level " + newLevelId + " loaded [" + newDetails.startSN + "," + newDetails.endSN + "], cc [" + newDetails.startCC + ", " + newDetails.endCC + "] duration:" + duration);
    var fragCurrent = this.fragCurrent;
    if (fragCurrent && (this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.FRAG_LOADING || this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.FRAG_LOADING_WAITING_RETRY)) {
      if (fragCurrent.level !== data.level && fragCurrent.loader) {
        this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
        this.backtrackFragment = null;
        fragCurrent.abortRequests();
      }
    }
    var curLevel = levels[newLevelId];
    var sliding = 0;
    if (newDetails.live || (_curLevel$details = curLevel.details) !== null && _curLevel$details !== void 0 && _curLevel$details.live) {
      if (!newDetails.fragments[0]) {
        newDetails.deltaUpdateFailed = true;
      }
      if (newDetails.deltaUpdateFailed) {
        return;
      }
      sliding = this.alignPlaylists(newDetails, curLevel.details);
    }
    // override level info
    curLevel.details = newDetails;
    this.levelLastLoaded = newLevelId;
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.LEVEL_UPDATED, {
      details: newDetails,
      level: newLevelId
    });

    // only switch back to IDLE state if we were waiting for level to start downloading a new fragment
    if (this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_LEVEL) {
      if (this.waitForCdnTuneIn(newDetails)) {
        // Wait for Low-Latency CDN Tune-in
        return;
      }
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
    }
    if (!this.startFragRequested) {
      this.setStartPosition(newDetails, sliding);
    } else if (newDetails.live) {
      this.synchronizeToLiveEdge(newDetails);
    }

    // trigger handler right now
    this.tick();
  };
  _proto._handleFragmentLoadProgress = function _handleFragmentLoadProgress(data) {
    var _frag$initSegment;
    var frag = data.frag,
      part = data.part,
      payload = data.payload;
    var levels = this.levels;
    if (!levels) {
      this.warn("Levels were reset while fragment load was in progress. Fragment " + frag.sn + " of level " + frag.level + " will not be buffered");
      return;
    }
    var currentLevel = levels[frag.level];
    var details = currentLevel.details;
    if (!details) {
      this.warn("Dropping fragment " + frag.sn + " of level " + frag.level + " after level details were reset");
      return;
    }
    var videoCodec = currentLevel.videoCodec;

    // time Offset is accurate if level PTS is known, or if playlist is not sliding (not live)
    var accurateTimeOffset = details.PTSKnown || !details.live;
    var initSegmentData = (_frag$initSegment = frag.initSegment) === null || _frag$initSegment === void 0 ? void 0 : _frag$initSegment.data;
    var audioCodec = this._getAudioCodec(currentLevel);

    // transmux the MPEG-TS data to ISO-BMFF segments
    // this.log(`Transmuxing ${frag.sn} of [${details.startSN} ,${details.endSN}],level ${frag.level}, cc ${frag.cc}`);
    var transmuxer = this.transmuxer = this.transmuxer || new _demux_transmuxer_interface__WEBPACK_IMPORTED_MODULE_8__["default"](this.hls, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN, this._handleTransmuxComplete.bind(this), this._handleTransmuxerFlush.bind(this));
    var partIndex = part ? part.index : -1;
    var partial = partIndex !== -1;
    var chunkMeta = new _types_transmuxer__WEBPACK_IMPORTED_MODULE_9__.ChunkMetadata(frag.level, frag.sn, frag.stats.chunkCount, payload.byteLength, partIndex, partial);
    var initPTS = this.initPTS[frag.cc];
    transmuxer.push(payload, initSegmentData, audioCodec, videoCodec, frag, part, details.totalduration, accurateTimeOffset, chunkMeta, initPTS);
  };
  _proto.onAudioTrackSwitching = function onAudioTrackSwitching(event, data) {
    // if any URL found on new audio track, it is an alternate audio track
    var fromAltAudio = this.altAudio;
    var altAudio = !!data.url;
    var trackId = data.id;
    // if we switch on main audio, ensure that main fragment scheduling is synced with media.buffered
    // don't do anything if we switch to alt audio: audio stream controller is handling it.
    // we will just have to change buffer scheduling on audioTrackSwitched
    if (!altAudio) {
      if (this.mediaBuffer !== this.media) {
        this.log('Switching on main audio, use media.buffered to schedule main fragment loading');
        this.mediaBuffer = this.media;
        var fragCurrent = this.fragCurrent;
        // we need to refill audio buffer from main: cancel any frag loading to speed up audio switch
        if (fragCurrent) {
          this.log('Switching to main audio track, cancel main fragment load');
          fragCurrent.abortRequests();
        }
        // destroy transmuxer to force init segment generation (following audio switch)
        this.resetTransmuxer();
        // switch to IDLE state to load new fragment
        this.resetLoadingState();
      } else if (this.audioOnly) {
        // Reset audio transmuxer so when switching back to main audio we're not still appending where we left off
        this.resetTransmuxer();
      }
      var hls = this.hls;
      // If switching from alt to main audio, flush all audio and trigger track switched
      if (fromAltAudio) {
        hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.BUFFER_FLUSHING, {
          startOffset: 0,
          endOffset: Number.POSITIVE_INFINITY,
          type: 'audio'
        });
      }
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.AUDIO_TRACK_SWITCHED, {
        id: trackId
      });
    }
  };
  _proto.onAudioTrackSwitched = function onAudioTrackSwitched(event, data) {
    var trackId = data.id;
    var altAudio = !!this.hls.audioTracks[trackId].url;
    if (altAudio) {
      var videoBuffer = this.videoBuffer;
      // if we switched on alternate audio, ensure that main fragment scheduling is synced with video sourcebuffer buffered
      if (videoBuffer && this.mediaBuffer !== videoBuffer) {
        this.log('Switching on alternate audio, use video.buffered to schedule main fragment loading');
        this.mediaBuffer = videoBuffer;
      }
    }
    this.altAudio = altAudio;
    this.tick();
  };
  _proto.onBufferCreated = function onBufferCreated(event, data) {
    var tracks = data.tracks;
    var mediaTrack;
    var name;
    var alternate = false;
    for (var type in tracks) {
      var track = tracks[type];
      if (track.id === 'main') {
        name = type;
        mediaTrack = track;
        // keep video source buffer reference
        if (type === 'video') {
          var videoTrack = tracks[type];
          if (videoTrack) {
            this.videoBuffer = videoTrack.buffer;
          }
        }
      } else {
        alternate = true;
      }
    }
    if (alternate && mediaTrack) {
      this.log("Alternate track found, use " + name + ".buffered to schedule main fragment loading");
      this.mediaBuffer = mediaTrack.buffer;
    } else {
      this.mediaBuffer = this.media;
    }
  };
  _proto.onFragBuffered = function onFragBuffered(event, data) {
    var frag = data.frag,
      part = data.part;
    if (frag && frag.type !== _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN) {
      return;
    }
    if (this.fragContextChanged(frag)) {
      // If a level switch was requested while a fragment was buffering, it will emit the FRAG_BUFFERED event upon completion
      // Avoid setting state back to IDLE, since that will interfere with a level switch
      this.warn("Fragment " + frag.sn + (part ? ' p: ' + part.index : '') + " of level " + frag.level + " finished buffering, but was aborted. state: " + this.state);
      if (this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.PARSED) {
        this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
      }
      return;
    }
    var stats = part ? part.stats : frag.stats;
    this.fragLastKbps = Math.round(8 * stats.total / (stats.buffering.end - stats.loading.first));
    if (frag.sn !== 'initSegment') {
      this.fragPrevious = frag;
    }
    this.fragBufferedComplete(frag, part);
  };
  _proto.onError = function onError(event, data) {
    if (data.type === _errors__WEBPACK_IMPORTED_MODULE_11__.ErrorTypes.KEY_SYSTEM_ERROR) {
      this.onFragmentOrKeyLoadError(_types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN, data);
      return;
    }
    switch (data.details) {
      case _errors__WEBPACK_IMPORTED_MODULE_11__.ErrorDetails.FRAG_LOAD_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_11__.ErrorDetails.FRAG_LOAD_TIMEOUT:
      case _errors__WEBPACK_IMPORTED_MODULE_11__.ErrorDetails.FRAG_PARSING_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_11__.ErrorDetails.KEY_LOAD_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_11__.ErrorDetails.KEY_LOAD_TIMEOUT:
        this.onFragmentOrKeyLoadError(_types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN, data);
        break;
      case _errors__WEBPACK_IMPORTED_MODULE_11__.ErrorDetails.LEVEL_LOAD_ERROR:
      case _errors__WEBPACK_IMPORTED_MODULE_11__.ErrorDetails.LEVEL_LOAD_TIMEOUT:
        if (this.state !== _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.ERROR) {
          if (data.fatal) {
            // if fatal error, stop processing
            this.warn("" + data.details);
            this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.ERROR;
          } else {
            // in case of non fatal error while loading level, if level controller is not retrying to load level , switch back to IDLE
            if (!data.levelRetry && this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.WAITING_LEVEL) {
              this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
            }
          }
        }
        break;
      case _errors__WEBPACK_IMPORTED_MODULE_11__.ErrorDetails.BUFFER_FULL_ERROR:
        // if in appending state
        if (data.parent === 'main' && (this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.PARSING || this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.PARSED)) {
          var flushBuffer = true;
          var bufferedInfo = this.getFwdBufferInfo(this.media, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN);
          // 0.5 : tolerance needed as some browsers stalls playback before reaching buffered end
          // reduce max buf len if current position is buffered
          if (bufferedInfo && bufferedInfo.len > 0.5) {
            flushBuffer = !this.reduceMaxBufferLength(bufferedInfo.len);
          }
          if (flushBuffer) {
            // current position is not buffered, but browser is still complaining about buffer full error
            // this happens on IE/Edge, refer to https://github.com/video-dev/hls.js/pull/708
            // in that case flush the whole buffer to recover
            this.warn('buffer full error also media.currentTime is not buffered, flush main');
            // flush main buffer
            this.immediateLevelSwitch();
          }
          this.resetLoadingState();
        }
        break;
      default:
        break;
    }
  }

  // Checks the health of the buffer and attempts to resolve playback stalls.
  ;
  _proto.checkBuffer = function checkBuffer() {
    var media = this.media,
      gapController = this.gapController;
    if (!media || !gapController || !media.readyState) {
      // Exit early if we don't have media or if the media hasn't buffered anything yet (readyState 0)
      return;
    }
    if (this.loadedmetadata || !_utils_buffer_helper__WEBPACK_IMPORTED_MODULE_4__.BufferHelper.getBuffered(media).length) {
      // Resolve gaps using the main buffer, whose ranges are the intersections of the A/V sourcebuffers
      var activeFrag = this.state !== _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE ? this.fragCurrent : null;
      gapController.poll(this.lastCurrentTime, activeFrag);
    }
    this.lastCurrentTime = media.currentTime;
  };
  _proto.onFragLoadEmergencyAborted = function onFragLoadEmergencyAborted() {
    this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
    // if loadedmetadata is not set, it means that we are emergency switch down on first frag
    // in that case, reset startFragRequested flag
    if (!this.loadedmetadata) {
      this.startFragRequested = false;
      this.nextLoadPosition = this.startPosition;
    }
    this.tickImmediate();
  };
  _proto.onBufferFlushed = function onBufferFlushed(event, _ref) {
    var type = _ref.type;
    if (type !== _loader_fragment__WEBPACK_IMPORTED_MODULE_7__.ElementaryStreamTypes.AUDIO || this.audioOnly && !this.altAudio) {
      var mediaBuffer = (type === _loader_fragment__WEBPACK_IMPORTED_MODULE_7__.ElementaryStreamTypes.VIDEO ? this.videoBuffer : this.mediaBuffer) || this.media;
      this.afterBufferFlushed(mediaBuffer, type, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN);
    }
  };
  _proto.onLevelsUpdated = function onLevelsUpdated(event, data) {
    this.levels = data.levels;
  };
  _proto.swapAudioCodec = function swapAudioCodec() {
    this.audioCodecSwap = !this.audioCodecSwap;
  }

  /**
   * Seeks to the set startPosition if not equal to the mediaElement's current time.
   */;
  _proto.seekToStartPos = function seekToStartPos() {
    var media = this.media;
    if (!media) {
      return;
    }
    var currentTime = media.currentTime;
    var startPosition = this.startPosition;
    // only adjust currentTime if different from startPosition or if startPosition not buffered
    // at that stage, there should be only one buffered range, as we reach that code after first fragment has been buffered
    if (startPosition >= 0 && currentTime < startPosition) {
      if (media.seeking) {
        this.log("could not seek to " + startPosition + ", already seeking at " + currentTime);
        return;
      }
      var buffered = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_4__.BufferHelper.getBuffered(media);
      var bufferStart = buffered.length ? buffered.start(0) : 0;
      var delta = bufferStart - startPosition;
      if (delta > 0 && (delta < this.config.maxBufferHole || delta < this.config.maxFragLookUpTolerance)) {
        this.log("adjusting start position by " + delta + " to match buffer start");
        startPosition += delta;
        this.startPosition = startPosition;
      }
      this.log("seek to target start position " + startPosition + " from current time " + currentTime);
      media.currentTime = startPosition;
    }
  };
  _proto._getAudioCodec = function _getAudioCodec(currentLevel) {
    var audioCodec = this.config.defaultAudioCodec || currentLevel.audioCodec;
    if (this.audioCodecSwap && audioCodec) {
      this.log('Swapping audio codec');
      if (audioCodec.indexOf('mp4a.40.5') !== -1) {
        audioCodec = 'mp4a.40.2';
      } else {
        audioCodec = 'mp4a.40.5';
      }
    }
    return audioCodec;
  };
  _proto._loadBitrateTestFrag = function _loadBitrateTestFrag(frag, levelDetails) {
    var _this2 = this;
    frag.bitrateTest = true;
    this._doFragLoad(frag, levelDetails).then(function (data) {
      var hls = _this2.hls;
      if (!data || _this2.fragContextChanged(frag)) {
        return;
      }
      _this2.fragLoadError = 0;
      _this2.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
      _this2.startFragRequested = false;
      _this2.bitrateTest = false;
      var stats = frag.stats;
      // Bitrate tests fragments are neither parsed nor buffered
      stats.parsing.start = stats.parsing.end = stats.buffering.start = stats.buffering.end = self.performance.now();
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.FRAG_LOADED, data);
      frag.bitrateTest = false;
    });
  };
  _proto._handleTransmuxComplete = function _handleTransmuxComplete(transmuxResult) {
    var _id3$samples;
    var id = 'main';
    var hls = this.hls;
    var remuxResult = transmuxResult.remuxResult,
      chunkMeta = transmuxResult.chunkMeta;
    var context = this.getCurrentContext(chunkMeta);
    if (!context) {
      this.warn("The loading context changed while buffering fragment " + chunkMeta.sn + " of level " + chunkMeta.level + ". This chunk will not be buffered.");
      this.resetStartWhenNotLoaded(chunkMeta.level);
      return;
    }
    var frag = context.frag,
      part = context.part,
      level = context.level;
    var video = remuxResult.video,
      text = remuxResult.text,
      id3 = remuxResult.id3,
      initSegment = remuxResult.initSegment;
    var details = level.details;
    // The audio-stream-controller handles audio buffering if Hls.js is playing an alternate audio track
    var audio = this.altAudio ? undefined : remuxResult.audio;

    // Check if the current fragment has been aborted. We check this by first seeing if we're still playing the current level.
    // If we are, subsequently check if the currently loading fragment (fragCurrent) has changed.
    if (this.fragContextChanged(frag)) {
      return;
    }
    this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.PARSING;
    if (initSegment) {
      if (initSegment.tracks) {
        this._bufferInitSegment(level, initSegment.tracks, frag, chunkMeta);
        hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.FRAG_PARSING_INIT_SEGMENT, {
          frag: frag,
          id: id,
          tracks: initSegment.tracks
        });
      }

      // This would be nice if Number.isFinite acted as a typeguard, but it doesn't. See: https://github.com/Microsoft/TypeScript/issues/10038
      var initPTS = initSegment.initPTS;
      var timescale = initSegment.timescale;
      if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(initPTS)) {
        this.initPTS[frag.cc] = initPTS;
        hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.INIT_PTS_FOUND, {
          frag: frag,
          id: id,
          initPTS: initPTS,
          timescale: timescale
        });
      }
    }

    // Avoid buffering if backtracking this fragment
    if (video && remuxResult.independent !== false) {
      if (details) {
        var startPTS = video.startPTS,
          endPTS = video.endPTS,
          startDTS = video.startDTS,
          endDTS = video.endDTS;
        if (part) {
          part.elementaryStreams[video.type] = {
            startPTS: startPTS,
            endPTS: endPTS,
            startDTS: startDTS,
            endDTS: endDTS
          };
        } else {
          if (video.firstKeyFrame && video.independent && chunkMeta.id === 1) {
            this.couldBacktrack = true;
          }
          if (video.dropped && video.independent) {
            // Backtrack if dropped frames create a gap after currentTime

            var bufferInfo = this.getMainFwdBufferInfo();
            var targetBufferTime = (bufferInfo ? bufferInfo.end : this.getLoadPosition()) + this.config.maxBufferHole;
            var startTime = video.firstKeyFramePTS ? video.firstKeyFramePTS : startPTS;
            if (targetBufferTime < startTime - this.config.maxBufferHole) {
              this.backtrack(frag);
              return;
            }
            // Set video stream start to fragment start so that truncated samples do not distort the timeline, and mark it partial
            frag.setElementaryStreamInfo(video.type, frag.start, endPTS, frag.start, endDTS, true);
          }
        }
        frag.setElementaryStreamInfo(video.type, startPTS, endPTS, startDTS, endDTS);
        if (this.backtrackFragment) {
          this.backtrackFragment = frag;
        }
        this.bufferFragmentData(video, frag, part, chunkMeta);
      }
    } else if (remuxResult.independent === false) {
      this.backtrack(frag);
      return;
    }
    if (audio) {
      var _startPTS = audio.startPTS,
        _endPTS = audio.endPTS,
        _startDTS = audio.startDTS,
        _endDTS = audio.endDTS;
      if (part) {
        part.elementaryStreams[_loader_fragment__WEBPACK_IMPORTED_MODULE_7__.ElementaryStreamTypes.AUDIO] = {
          startPTS: _startPTS,
          endPTS: _endPTS,
          startDTS: _startDTS,
          endDTS: _endDTS
        };
      }
      frag.setElementaryStreamInfo(_loader_fragment__WEBPACK_IMPORTED_MODULE_7__.ElementaryStreamTypes.AUDIO, _startPTS, _endPTS, _startDTS, _endDTS);
      this.bufferFragmentData(audio, frag, part, chunkMeta);
    }
    if (details && id3 !== null && id3 !== void 0 && (_id3$samples = id3.samples) !== null && _id3$samples !== void 0 && _id3$samples.length) {
      var emittedID3 = {
        id: id,
        frag: frag,
        details: details,
        samples: id3.samples
      };
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.FRAG_PARSING_METADATA, emittedID3);
    }
    if (details && text) {
      var emittedText = {
        id: id,
        frag: frag,
        details: details,
        samples: text.samples
      };
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.FRAG_PARSING_USERDATA, emittedText);
    }
  };
  _proto._bufferInitSegment = function _bufferInitSegment(currentLevel, tracks, frag, chunkMeta) {
    var _this3 = this;
    if (this.state !== _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.PARSING) {
      return;
    }
    this.audioOnly = !!tracks.audio && !tracks.video;

    // if audio track is expected to come from audio stream controller, discard any coming from main
    if (this.altAudio && !this.audioOnly) {
      delete tracks.audio;
    }
    // include levelCodec in audio and video tracks
    var audio = tracks.audio,
      video = tracks.video,
      audiovideo = tracks.audiovideo;
    if (audio) {
      var audioCodec = currentLevel.audioCodec;
      var ua = navigator.userAgent.toLowerCase();
      if (this.audioCodecSwitch) {
        if (audioCodec) {
          if (audioCodec.indexOf('mp4a.40.5') !== -1) {
            audioCodec = 'mp4a.40.2';
          } else {
            audioCodec = 'mp4a.40.5';
          }
        }
        // In the case that AAC and HE-AAC audio codecs are signalled in manifest,
        // force HE-AAC, as it seems that most browsers prefers it.
        // don't force HE-AAC if mono stream, or in Firefox
        if (audio.metadata.channelCount !== 1 && ua.indexOf('firefox') === -1) {
          audioCodec = 'mp4a.40.5';
        }
      }
      // HE-AAC is broken on Android, always signal audio codec as AAC even if variant manifest states otherwise
      if (ua.indexOf('android') !== -1 && audio.container !== 'audio/mpeg') {
        // Exclude mpeg audio
        audioCodec = 'mp4a.40.2';
        this.log("Android: force audio codec to " + audioCodec);
      }
      if (currentLevel.audioCodec && currentLevel.audioCodec !== audioCodec) {
        this.log("Swapping manifest audio codec \"" + currentLevel.audioCodec + "\" for \"" + audioCodec + "\"");
      }
      audio.levelCodec = audioCodec;
      audio.id = 'main';
      this.log("Init audio buffer, container:" + audio.container + ", codecs[selected/level/parsed]=[" + (audioCodec || '') + "/" + (currentLevel.audioCodec || '') + "/" + audio.codec + "]");
    }
    if (video) {
      video.levelCodec = currentLevel.videoCodec;
      video.id = 'main';
      this.log("Init video buffer, container:" + video.container + ", codecs[level/parsed]=[" + (currentLevel.videoCodec || '') + "/" + video.codec + "]");
    }
    if (audiovideo) {
      this.log("Init audiovideo buffer, container:" + audiovideo.container + ", codecs[level/parsed]=[" + (currentLevel.attrs.CODECS || '') + "/" + audiovideo.codec + "]");
    }
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.BUFFER_CODECS, tracks);
    // loop through tracks that are going to be provided to bufferController
    Object.keys(tracks).forEach(function (trackName) {
      var track = tracks[trackName];
      var initSegment = track.initSegment;
      if (initSegment !== null && initSegment !== void 0 && initSegment.byteLength) {
        _this3.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.BUFFER_APPENDING, {
          type: trackName,
          data: initSegment,
          frag: frag,
          part: null,
          chunkMeta: chunkMeta,
          parent: frag.type
        });
      }
    });
    // trigger handler right now
    this.tick();
  };
  _proto.getMainFwdBufferInfo = function getMainFwdBufferInfo() {
    return this.getFwdBufferInfo(this.mediaBuffer ? this.mediaBuffer : this.media, _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.MAIN);
  };
  _proto.backtrack = function backtrack(frag) {
    this.couldBacktrack = true;
    // Causes findFragments to backtrack through fragments to find the keyframe
    this.backtrackFragment = frag;
    this.resetTransmuxer();
    this.flushBufferGap(frag);
    this.fragmentTracker.removeFragment(frag);
    this.fragPrevious = null;
    this.nextLoadPosition = frag.start;
    this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_1__.State.IDLE;
  };
  _proto.checkFragmentChanged = function checkFragmentChanged() {
    var video = this.media;
    var fragPlayingCurrent = null;
    if (video && video.readyState > 1 && video.seeking === false) {
      var currentTime = video.currentTime;
      /* if video element is in seeked state, currentTime can only increase.
        (assuming that playback rate is positive ...)
        As sometimes currentTime jumps back to zero after a
        media decode error, check this, to avoid seeking back to
        wrong position after a media decode error
      */

      if (_utils_buffer_helper__WEBPACK_IMPORTED_MODULE_4__.BufferHelper.isBuffered(video, currentTime)) {
        fragPlayingCurrent = this.getAppendedFrag(currentTime);
      } else if (_utils_buffer_helper__WEBPACK_IMPORTED_MODULE_4__.BufferHelper.isBuffered(video, currentTime + 0.1)) {
        /* ensure that FRAG_CHANGED event is triggered at startup,
          when first video frame is displayed and playback is paused.
          add a tolerance of 100ms, in case current position is not buffered,
          check if current pos+100ms is buffered and use that buffer range
          for FRAG_CHANGED event reporting */
        fragPlayingCurrent = this.getAppendedFrag(currentTime + 0.1);
      }
      if (fragPlayingCurrent) {
        this.backtrackFragment = null;
        var fragPlaying = this.fragPlaying;
        var fragCurrentLevel = fragPlayingCurrent.level;
        if (!fragPlaying || fragPlayingCurrent.sn !== fragPlaying.sn || fragPlaying.level !== fragCurrentLevel || fragPlayingCurrent.urlId !== fragPlaying.urlId) {
          this.fragPlaying = fragPlayingCurrent;
          this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.FRAG_CHANGED, {
            frag: fragPlayingCurrent
          });
          if (!fragPlaying || fragPlaying.level !== fragCurrentLevel) {
            this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_3__.Events.LEVEL_SWITCHED, {
              level: fragCurrentLevel
            });
          }
        }
      }
    }
  };
  _createClass(StreamController, [{
    key: "nextLevel",
    get: function get() {
      var frag = this.nextBufferedFrag;
      if (frag) {
        return frag.level;
      }
      return -1;
    }
  }, {
    key: "currentFrag",
    get: function get() {
      var media = this.media;
      if (media) {
        return this.fragPlaying || this.getAppendedFrag(media.currentTime);
      }
      return null;
    }
  }, {
    key: "currentProgramDateTime",
    get: function get() {
      var media = this.media;
      if (media) {
        var currentTime = media.currentTime;
        var frag = this.currentFrag;
        if (frag && (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(currentTime) && (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(frag.programDateTime)) {
          var epocMs = frag.programDateTime + (currentTime - frag.start) * 1000;
          return new Date(epocMs);
        }
      }
      return null;
    }
  }, {
    key: "currentLevel",
    get: function get() {
      var frag = this.currentFrag;
      if (frag) {
        return frag.level;
      }
      return -1;
    }
  }, {
    key: "nextBufferedFrag",
    get: function get() {
      var frag = this.currentFrag;
      if (frag) {
        return this.followingBufferedFrag(frag);
      }
      return null;
    }
  }, {
    key: "forceStartLoad",
    get: function get() {
      return this._forceStartLoad;
    }
  }]);
  return StreamController;
}(_base_stream_controller__WEBPACK_IMPORTED_MODULE_1__["default"]);


/***/ }),

/***/ "./src/controller/subtitle-stream-controller.ts":
/*!******************************************************!*\
  !*** ./src/controller/subtitle-stream-controller.ts ***!
  \******************************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "SubtitleStreamController": () => (/* binding */ SubtitleStreamController)
/* harmony export */ });
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../utils/buffer-helper */ "./src/utils/buffer-helper.ts");
/* harmony import */ var _fragment_finders__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./fragment-finders */ "./src/controller/fragment-finders.ts");
/* harmony import */ var _utils_discontinuities__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/discontinuities */ "./src/utils/discontinuities.ts");
/* harmony import */ var _level_helper__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ./level-helper */ "./src/controller/level-helper.ts");
/* harmony import */ var _fragment_tracker__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ./fragment-tracker */ "./src/controller/fragment-tracker.ts");
/* harmony import */ var _base_stream_controller__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ./base-stream-controller */ "./src/controller/base-stream-controller.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");
/* harmony import */ var _types_level__WEBPACK_IMPORTED_MODULE_8__ = __webpack_require__(/*! ../types/level */ "./src/types/level.ts");
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }









var TICK_INTERVAL = 500; // how often to tick in ms

var SubtitleStreamController = /*#__PURE__*/function (_BaseStreamController) {
  _inheritsLoose(SubtitleStreamController, _BaseStreamController);
  function SubtitleStreamController(hls, fragmentTracker, keyLoader) {
    var _this;
    _this = _BaseStreamController.call(this, hls, fragmentTracker, keyLoader, '[subtitle-stream-controller]') || this;
    _this.levels = [];
    _this.currentTrackId = -1;
    _this.tracksBuffered = [];
    _this.mainDetails = null;
    _this._registerListeners();
    return _this;
  }
  var _proto = SubtitleStreamController.prototype;
  _proto.onHandlerDestroying = function onHandlerDestroying() {
    this._unregisterListeners();
    this.mainDetails = null;
  };
  _proto._registerListeners = function _registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.LEVEL_LOADED, this.onLevelLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.ERROR, this.onError, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACKS_UPDATED, this.onSubtitleTracksUpdated, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACK_SWITCH, this.onSubtitleTrackSwitch, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACK_LOADED, this.onSubtitleTrackLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_FRAG_PROCESSED, this.onSubtitleFragProcessed, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.FRAG_BUFFERED, this.onFragBuffered, this);
  };
  _proto._unregisterListeners = function _unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.LEVEL_LOADED, this.onLevelLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.ERROR, this.onError, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACKS_UPDATED, this.onSubtitleTracksUpdated, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACK_SWITCH, this.onSubtitleTrackSwitch, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACK_LOADED, this.onSubtitleTrackLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_FRAG_PROCESSED, this.onSubtitleFragProcessed, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.FRAG_BUFFERED, this.onFragBuffered, this);
  };
  _proto.startLoad = function startLoad(startPosition) {
    this.stopLoad();
    this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_6__.State.IDLE;
    this.setInterval(TICK_INTERVAL);
    this.nextLoadPosition = this.startPosition = this.lastCurrentTime = startPosition;
    this.tick();
  };
  _proto.onManifestLoading = function onManifestLoading() {
    this.mainDetails = null;
    this.fragmentTracker.removeAllFragments();
  };
  _proto.onLevelLoaded = function onLevelLoaded(event, data) {
    this.mainDetails = data.details;
  };
  _proto.onSubtitleFragProcessed = function onSubtitleFragProcessed(event, data) {
    var frag = data.frag,
      success = data.success;
    this.fragPrevious = frag;
    this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_6__.State.IDLE;
    if (!success) {
      return;
    }
    var buffered = this.tracksBuffered[this.currentTrackId];
    if (!buffered) {
      return;
    }

    // Create/update a buffered array matching the interface used by BufferHelper.bufferedInfo
    // so we can re-use the logic used to detect how much has been buffered
    var timeRange;
    var fragStart = frag.start;
    for (var i = 0; i < buffered.length; i++) {
      if (fragStart >= buffered[i].start && fragStart <= buffered[i].end) {
        timeRange = buffered[i];
        break;
      }
    }
    var fragEnd = frag.start + frag.duration;
    if (timeRange) {
      timeRange.end = fragEnd;
    } else {
      timeRange = {
        start: fragStart,
        end: fragEnd
      };
      buffered.push(timeRange);
    }
    this.fragmentTracker.fragBuffered(frag);
  };
  _proto.onBufferFlushing = function onBufferFlushing(event, data) {
    var startOffset = data.startOffset,
      endOffset = data.endOffset;
    if (startOffset === 0 && endOffset !== Number.POSITIVE_INFINITY) {
      var currentTrackId = this.currentTrackId,
        levels = this.levels;
      if (!levels.length || !levels[currentTrackId] || !levels[currentTrackId].details) {
        return;
      }
      var trackDetails = levels[currentTrackId].details;
      var targetDuration = trackDetails.targetduration;
      var endOffsetSubtitles = endOffset - targetDuration;
      if (endOffsetSubtitles <= 0) {
        return;
      }
      data.endOffsetSubtitles = Math.max(0, endOffsetSubtitles);
      this.tracksBuffered.forEach(function (buffered) {
        for (var i = 0; i < buffered.length;) {
          if (buffered[i].end <= endOffsetSubtitles) {
            buffered.shift();
            continue;
          } else if (buffered[i].start < endOffsetSubtitles) {
            buffered[i].start = endOffsetSubtitles;
          } else {
            break;
          }
          i++;
        }
      });
      this.fragmentTracker.removeFragmentsInRange(startOffset, endOffsetSubtitles, _types_loader__WEBPACK_IMPORTED_MODULE_7__.PlaylistLevelType.SUBTITLE);
    }
  };
  _proto.onFragBuffered = function onFragBuffered(event, data) {
    if (!this.loadedmetadata && data.frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_7__.PlaylistLevelType.MAIN) {
      var _this$media;
      if ((_this$media = this.media) !== null && _this$media !== void 0 && _this$media.buffered.length) {
        this.loadedmetadata = true;
      }
    }
  }

  // If something goes wrong, proceed to next frag, if we were processing one.
  ;
  _proto.onError = function onError(event, data) {
    var frag = data.frag;
    // don't handle error not related to subtitle fragment
    if (!frag || frag.type !== _types_loader__WEBPACK_IMPORTED_MODULE_7__.PlaylistLevelType.SUBTITLE) {
      return;
    }
    if (this.fragCurrent) {
      this.fragCurrent.abortRequests();
    }
    this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_6__.State.IDLE;
  }

  // Got all new subtitle levels.
  ;
  _proto.onSubtitleTracksUpdated = function onSubtitleTracksUpdated(event, _ref) {
    var _this2 = this;
    var subtitleTracks = _ref.subtitleTracks;
    this.tracksBuffered = [];
    this.levels = subtitleTracks.map(function (mediaPlaylist) {
      return new _types_level__WEBPACK_IMPORTED_MODULE_8__.Level(mediaPlaylist);
    });
    this.fragmentTracker.removeAllFragments();
    this.fragPrevious = null;
    this.levels.forEach(function (level) {
      _this2.tracksBuffered[level.id] = [];
    });
    this.mediaBuffer = null;
  };
  _proto.onSubtitleTrackSwitch = function onSubtitleTrackSwitch(event, data) {
    this.currentTrackId = data.id;
    if (!this.levels.length || this.currentTrackId === -1) {
      this.clearInterval();
      return;
    }

    // Check if track has the necessary details to load fragments
    var currentTrack = this.levels[this.currentTrackId];
    if (currentTrack !== null && currentTrack !== void 0 && currentTrack.details) {
      this.mediaBuffer = this.mediaBufferTimeRanges;
    } else {
      this.mediaBuffer = null;
    }
    if (currentTrack) {
      this.setInterval(TICK_INTERVAL);
    }
  }

  // Got a new set of subtitle fragments.
  ;
  _proto.onSubtitleTrackLoaded = function onSubtitleTrackLoaded(event, data) {
    var _track$details;
    var newDetails = data.details,
      trackId = data.id;
    var currentTrackId = this.currentTrackId,
      levels = this.levels;
    if (!levels.length) {
      return;
    }
    var track = levels[currentTrackId];
    if (trackId >= levels.length || trackId !== currentTrackId || !track) {
      return;
    }
    this.mediaBuffer = this.mediaBufferTimeRanges;
    var sliding = 0;
    if (newDetails.live || (_track$details = track.details) !== null && _track$details !== void 0 && _track$details.live) {
      var mainDetails = this.mainDetails;
      if (newDetails.deltaUpdateFailed || !mainDetails) {
        return;
      }
      var mainSlidingStartFragment = mainDetails.fragments[0];
      if (!track.details) {
        if (newDetails.hasProgramDateTime && mainDetails.hasProgramDateTime) {
          (0,_utils_discontinuities__WEBPACK_IMPORTED_MODULE_3__.alignMediaPlaylistByPDT)(newDetails, mainDetails);
          sliding = newDetails.fragments[0].start;
        } else if (mainSlidingStartFragment) {
          // line up live playlist with main so that fragments in range are loaded
          sliding = mainSlidingStartFragment.start;
          (0,_level_helper__WEBPACK_IMPORTED_MODULE_4__.addSliding)(newDetails, sliding);
        }
      } else {
        sliding = this.alignPlaylists(newDetails, track.details);
        if (sliding === 0 && mainSlidingStartFragment) {
          // realign with main when there is no overlap with last refresh
          sliding = mainSlidingStartFragment.start;
          (0,_level_helper__WEBPACK_IMPORTED_MODULE_4__.addSliding)(newDetails, sliding);
        }
      }
    }
    track.details = newDetails;
    this.levelLastLoaded = trackId;
    if (!this.startFragRequested && (this.mainDetails || !newDetails.live)) {
      this.setStartPosition(track.details, sliding);
    }

    // trigger handler right now
    this.tick();

    // If playlist is misaligned because of bad PDT or drift, delete details to resync with main on reload
    if (newDetails.live && !this.fragCurrent && this.media && this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_6__.State.IDLE) {
      var foundFrag = (0,_fragment_finders__WEBPACK_IMPORTED_MODULE_2__.findFragmentByPTS)(null, newDetails.fragments, this.media.currentTime, 0);
      if (!foundFrag) {
        this.warn('Subtitle playlist not aligned with playback');
        track.details = undefined;
      }
    }
  };
  _proto._handleFragmentLoadComplete = function _handleFragmentLoadComplete(fragLoadedData) {
    var _this3 = this;
    var frag = fragLoadedData.frag,
      payload = fragLoadedData.payload;
    var decryptData = frag.decryptdata;
    var hls = this.hls;
    if (this.fragContextChanged(frag)) {
      return;
    }
    // check to see if the payload needs to be decrypted
    if (payload && payload.byteLength > 0 && decryptData && decryptData.key && decryptData.iv && decryptData.method === 'AES-128') {
      var startTime = performance.now();
      // decrypt the subtitles
      this.decrypter.decrypt(new Uint8Array(payload), decryptData.key.buffer, decryptData.iv.buffer).then(function (decryptedData) {
        var endTime = performance.now();
        hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.FRAG_DECRYPTED, {
          frag: frag,
          payload: decryptedData,
          stats: {
            tstart: startTime,
            tdecrypt: endTime
          }
        });
      }).catch(function (err) {
        _this3.warn(err.name + ": " + err.message);
        _this3.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_6__.State.IDLE;
      });
    }
  };
  _proto.doTick = function doTick() {
    if (!this.media) {
      this.state = _base_stream_controller__WEBPACK_IMPORTED_MODULE_6__.State.IDLE;
      return;
    }
    if (this.state === _base_stream_controller__WEBPACK_IMPORTED_MODULE_6__.State.IDLE) {
      var currentTrackId = this.currentTrackId,
        levels = this.levels;
      if (!levels.length || !levels[currentTrackId] || !levels[currentTrackId].details) {
        return;
      }

      // Expand range of subs loaded by one target-duration in either direction to make up for misaligned playlists
      var trackDetails = levels[currentTrackId].details;
      var targetDuration = trackDetails.targetduration;
      var config = this.config;
      var currentTime = this.getLoadPosition();
      var bufferedInfo = _utils_buffer_helper__WEBPACK_IMPORTED_MODULE_1__.BufferHelper.bufferedInfo(this.tracksBuffered[this.currentTrackId] || [], currentTime - targetDuration, config.maxBufferHole);
      var targetBufferTime = bufferedInfo.end,
        bufferLen = bufferedInfo.len;
      var mainBufferInfo = this.getFwdBufferInfo(this.media, _types_loader__WEBPACK_IMPORTED_MODULE_7__.PlaylistLevelType.MAIN);
      var maxBufLen = this.getMaxBufferLength(mainBufferInfo === null || mainBufferInfo === void 0 ? void 0 : mainBufferInfo.len) + targetDuration;
      if (bufferLen > maxBufLen) {
        return;
      }
      console.assert(trackDetails, 'Subtitle track details are defined on idle subtitle stream controller tick');
      var fragments = trackDetails.fragments;
      var fragLen = fragments.length;
      var end = trackDetails.edge;
      var foundFrag = null;
      var fragPrevious = this.fragPrevious;
      if (targetBufferTime < end) {
        var maxFragLookUpTolerance = config.maxFragLookUpTolerance;
        foundFrag = (0,_fragment_finders__WEBPACK_IMPORTED_MODULE_2__.findFragmentByPTS)(fragPrevious, fragments, Math.max(fragments[0].start, targetBufferTime), maxFragLookUpTolerance);
        if (!foundFrag && fragPrevious && fragPrevious.start < fragments[0].start) {
          foundFrag = fragments[0];
        }
      } else {
        foundFrag = fragments[fragLen - 1];
      }
      if (!foundFrag) {
        return;
      }
      foundFrag = this.mapToInitFragWhenRequired(foundFrag);
      if (this.fragmentTracker.getState(foundFrag) === _fragment_tracker__WEBPACK_IMPORTED_MODULE_5__.FragmentState.NOT_LOADED) {
        // only load if fragment is not loaded
        this.loadFragment(foundFrag, trackDetails, targetBufferTime);
      }
    }
  };
  _proto.getMaxBufferLength = function getMaxBufferLength(mainBufferLength) {
    var maxConfigBuffer = _BaseStreamController.prototype.getMaxBufferLength.call(this);
    if (!mainBufferLength) {
      return maxConfigBuffer;
    }
    return Math.max(maxConfigBuffer, mainBufferLength);
  };
  _proto.loadFragment = function loadFragment(frag, levelDetails, targetBufferTime) {
    this.fragCurrent = frag;
    if (frag.sn === 'initSegment') {
      this._loadInitSegment(frag, levelDetails);
    } else {
      this.startFragRequested = true;
      _BaseStreamController.prototype.loadFragment.call(this, frag, levelDetails, targetBufferTime);
    }
  };
  _createClass(SubtitleStreamController, [{
    key: "mediaBufferTimeRanges",
    get: function get() {
      return new BufferableInstance(this.tracksBuffered[this.currentTrackId] || []);
    }
  }]);
  return SubtitleStreamController;
}(_base_stream_controller__WEBPACK_IMPORTED_MODULE_6__["default"]);
var BufferableInstance = function BufferableInstance(timeranges) {
  this.buffered = void 0;
  var getRange = function getRange(name, index, length) {
    index = index >>> 0;
    if (index > length - 1) {
      throw new DOMException("Failed to execute '" + name + "' on 'TimeRanges': The index provided (" + index + ") is greater than the maximum bound (" + length + ")");
    }
    return timeranges[index][name];
  };
  this.buffered = {
    get length() {
      return timeranges.length;
    },
    end: function end(index) {
      return getRange('end', index, timeranges.length);
    },
    start: function start(index) {
      return getRange('start', index, timeranges.length);
    }
  };
};

/***/ }),

/***/ "./src/controller/subtitle-track-controller.ts":
/*!*****************************************************!*\
  !*** ./src/controller/subtitle-track-controller.ts ***!
  \*****************************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../utils/texttrack-utils */ "./src/utils/texttrack-utils.ts");
/* harmony import */ var _base_playlist_controller__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./base-playlist-controller */ "./src/controller/base-playlist-controller.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }




var SubtitleTrackController = /*#__PURE__*/function (_BasePlaylistControll) {
  _inheritsLoose(SubtitleTrackController, _BasePlaylistControll);
  function SubtitleTrackController(hls) {
    var _this;
    _this = _BasePlaylistControll.call(this, hls, '[subtitle-track-controller]') || this;
    _this.media = null;
    _this.tracks = [];
    _this.groupId = null;
    _this.tracksInGroup = [];
    _this.trackId = -1;
    _this.selectDefaultTrack = true;
    _this.queuedDefaultTrack = -1;
    _this.trackChangeListener = function () {
      return _this.onTextTracksChanged();
    };
    _this.asyncPollTrackChange = function () {
      return _this.pollTrackChange(0);
    };
    _this.useTextTrackPolling = false;
    _this.subtitlePollingInterval = -1;
    _this._subtitleDisplay = true;
    _this.registerListeners();
    return _this;
  }
  var _proto = SubtitleTrackController.prototype;
  _proto.destroy = function destroy() {
    this.unregisterListeners();
    this.tracks.length = 0;
    this.tracksInGroup.length = 0;
    this.trackChangeListener = this.asyncPollTrackChange = null;
    _BasePlaylistControll.prototype.destroy.call(this);
  };
  _proto.registerListeners = function registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_PARSED, this.onManifestParsed, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.LEVEL_LOADING, this.onLevelLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.LEVEL_SWITCHING, this.onLevelSwitching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACK_LOADED, this.onSubtitleTrackLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_0__.Events.ERROR, this.onError, this);
  };
  _proto.unregisterListeners = function unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_ATTACHED, this.onMediaAttached, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.MANIFEST_PARSED, this.onManifestParsed, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.LEVEL_LOADING, this.onLevelLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.LEVEL_SWITCHING, this.onLevelSwitching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACK_LOADED, this.onSubtitleTrackLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_0__.Events.ERROR, this.onError, this);
  }

  // Listen for subtitle track change, then extract the current track ID.
  ;
  _proto.onMediaAttached = function onMediaAttached(event, data) {
    this.media = data.media;
    if (!this.media) {
      return;
    }
    if (this.queuedDefaultTrack > -1) {
      this.subtitleTrack = this.queuedDefaultTrack;
      this.queuedDefaultTrack = -1;
    }
    this.useTextTrackPolling = !(this.media.textTracks && 'onchange' in this.media.textTracks);
    if (this.useTextTrackPolling) {
      this.pollTrackChange(500);
    } else {
      this.media.textTracks.addEventListener('change', this.asyncPollTrackChange);
    }
  };
  _proto.pollTrackChange = function pollTrackChange(timeout) {
    self.clearInterval(this.subtitlePollingInterval);
    this.subtitlePollingInterval = self.setInterval(this.trackChangeListener, timeout);
  };
  _proto.onMediaDetaching = function onMediaDetaching() {
    if (!this.media) {
      return;
    }
    self.clearInterval(this.subtitlePollingInterval);
    if (!this.useTextTrackPolling) {
      this.media.textTracks.removeEventListener('change', this.asyncPollTrackChange);
    }
    if (this.trackId > -1) {
      this.queuedDefaultTrack = this.trackId;
    }
    var textTracks = filterSubtitleTracks(this.media.textTracks);
    // Clear loaded cues on media detachment from tracks
    textTracks.forEach(function (track) {
      (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_1__.clearCurrentCues)(track);
    });
    // Disable all subtitle tracks before detachment so when reattached only tracks in that content are enabled.
    this.subtitleTrack = -1;
    this.media = null;
  };
  _proto.onManifestLoading = function onManifestLoading() {
    this.tracks = [];
    this.groupId = null;
    this.tracksInGroup = [];
    this.trackId = -1;
    this.selectDefaultTrack = true;
  }

  // Fired whenever a new manifest is loaded.
  ;
  _proto.onManifestParsed = function onManifestParsed(event, data) {
    this.tracks = data.subtitleTracks;
  };
  _proto.onSubtitleTrackLoaded = function onSubtitleTrackLoaded(event, data) {
    var id = data.id,
      details = data.details;
    var trackId = this.trackId;
    var currentTrack = this.tracksInGroup[trackId];
    if (!currentTrack) {
      this.warn("Invalid subtitle track id " + id);
      return;
    }
    var curDetails = currentTrack.details;
    currentTrack.details = data.details;
    this.log("subtitle track " + id + " loaded [" + details.startSN + "-" + details.endSN + "]");
    if (id === this.trackId) {
      this.retryCount = 0;
      this.playlistLoaded(id, data, curDetails);
    }
  };
  _proto.onLevelLoading = function onLevelLoading(event, data) {
    this.switchLevel(data.level);
  };
  _proto.onLevelSwitching = function onLevelSwitching(event, data) {
    this.switchLevel(data.level);
  };
  _proto.switchLevel = function switchLevel(levelIndex) {
    var levelInfo = this.hls.levels[levelIndex];
    if (!(levelInfo !== null && levelInfo !== void 0 && levelInfo.textGroupIds)) {
      return;
    }
    var textGroupId = levelInfo.textGroupIds[levelInfo.urlId];
    if (this.groupId !== textGroupId) {
      var lastTrack = this.tracksInGroup ? this.tracksInGroup[this.trackId] : undefined;
      var subtitleTracks = this.tracks.filter(function (track) {
        return !textGroupId || track.groupId === textGroupId;
      });
      this.tracksInGroup = subtitleTracks;
      var initialTrackId = this.findTrackId(lastTrack === null || lastTrack === void 0 ? void 0 : lastTrack.name) || this.findTrackId();
      this.groupId = textGroupId;
      var subtitleTracksUpdated = {
        subtitleTracks: subtitleTracks
      };
      this.log("Updating subtitle tracks, " + subtitleTracks.length + " track(s) found in \"" + textGroupId + "\" group-id");
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACKS_UPDATED, subtitleTracksUpdated);
      if (initialTrackId !== -1) {
        this.setSubtitleTrack(initialTrackId, lastTrack);
      }
    }
  };
  _proto.findTrackId = function findTrackId(name) {
    var textTracks = this.tracksInGroup;
    for (var i = 0; i < textTracks.length; i++) {
      var track = textTracks[i];
      if (!this.selectDefaultTrack || track.default) {
        if (!name || name === track.name) {
          return track.id;
        }
      }
    }
    return -1;
  };
  _proto.onError = function onError(event, data) {
    _BasePlaylistControll.prototype.onError.call(this, event, data);
    if (data.fatal || !data.context) {
      return;
    }
    if (data.context.type === _types_loader__WEBPACK_IMPORTED_MODULE_3__.PlaylistContextType.SUBTITLE_TRACK && data.context.id === this.trackId && data.context.groupId === this.groupId) {
      this.retryLoadingOrFail(data);
    }
  }

  /** get alternate subtitle tracks list from playlist **/;
  _proto.loadPlaylist = function loadPlaylist(hlsUrlParameters) {
    _BasePlaylistControll.prototype.loadPlaylist.call(this);
    var currentTrack = this.tracksInGroup[this.trackId];
    if (this.shouldLoadTrack(currentTrack)) {
      var id = currentTrack.id;
      var groupId = currentTrack.groupId;
      var url = currentTrack.url;
      if (hlsUrlParameters) {
        try {
          url = hlsUrlParameters.addDirectives(url);
        } catch (error) {
          this.warn("Could not construct new URL with HLS Delivery Directives: " + error);
        }
      }
      this.log("Loading subtitle playlist for id " + id);
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACK_LOADING, {
        url: url,
        id: id,
        groupId: groupId,
        deliveryDirectives: hlsUrlParameters || null
      });
    }
  }

  /**
   * Disables the old subtitleTrack and sets current mode on the next subtitleTrack.
   * This operates on the DOM textTracks.
   * A value of -1 will disable all subtitle tracks.
   */;
  _proto.toggleTrackModes = function toggleTrackModes(newId) {
    var _this2 = this;
    var media = this.media,
      trackId = this.trackId;
    if (!media) {
      return;
    }
    var textTracks = filterSubtitleTracks(media.textTracks);
    var groupTracks = textTracks.filter(function (track) {
      return track.groupId === _this2.groupId;
    });
    if (newId === -1) {
      [].slice.call(textTracks).forEach(function (track) {
        track.mode = 'disabled';
      });
    } else {
      var oldTrack = groupTracks[trackId];
      if (oldTrack) {
        oldTrack.mode = 'disabled';
      }
    }
    var nextTrack = groupTracks[newId];
    if (nextTrack) {
      nextTrack.mode = this.subtitleDisplay ? 'showing' : 'hidden';
    }
  }

  /**
   * This method is responsible for validating the subtitle index and periodically reloading if live.
   * Dispatches the SUBTITLE_TRACK_SWITCH event, which instructs the subtitle-stream-controller to load the selected track.
   */;
  _proto.setSubtitleTrack = function setSubtitleTrack(newId, lastTrack) {
    var _tracks$newId;
    var tracks = this.tracksInGroup;

    // setting this.subtitleTrack will trigger internal logic
    // if media has not been attached yet, it will fail
    // we keep a reference to the default track id
    // and we'll set subtitleTrack when onMediaAttached is triggered
    if (!this.media) {
      this.queuedDefaultTrack = newId;
      return;
    }
    if (this.trackId !== newId) {
      this.toggleTrackModes(newId);
    }

    // exit if track id as already set or invalid
    if (this.trackId === newId && (newId === -1 || (_tracks$newId = tracks[newId]) !== null && _tracks$newId !== void 0 && _tracks$newId.details) || newId < -1 || newId >= tracks.length) {
      return;
    }

    // stopping live reloading timer if any
    this.clearTimer();
    var track = tracks[newId];
    this.log("Switching to subtitle track " + newId);
    this.trackId = newId;
    if (track) {
      var id = track.id,
        _track$groupId = track.groupId,
        groupId = _track$groupId === void 0 ? '' : _track$groupId,
        name = track.name,
        type = track.type,
        url = track.url;
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACK_SWITCH, {
        id: id,
        groupId: groupId,
        name: name,
        type: type,
        url: url
      });
      var hlsUrlParameters = this.switchParams(track.url, lastTrack === null || lastTrack === void 0 ? void 0 : lastTrack.details);
      this.loadPlaylist(hlsUrlParameters);
    } else {
      // switch to -1
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_0__.Events.SUBTITLE_TRACK_SWITCH, {
        id: newId
      });
    }
  };
  _proto.onTextTracksChanged = function onTextTracksChanged() {
    if (!this.useTextTrackPolling) {
      self.clearInterval(this.subtitlePollingInterval);
    }
    // Media is undefined when switching streams via loadSource()
    if (!this.media || !this.hls.config.renderTextTracksNatively) {
      return;
    }
    var trackId = -1;
    var tracks = filterSubtitleTracks(this.media.textTracks);
    for (var id = 0; id < tracks.length; id++) {
      if (tracks[id].mode === 'hidden') {
        // Do not break in case there is a following track with showing.
        trackId = id;
      } else if (tracks[id].mode === 'showing') {
        trackId = id;
        break;
      }
    }

    // Setting current subtitleTrack will invoke code.
    if (this.subtitleTrack !== trackId) {
      this.subtitleTrack = trackId;
    }
  };
  _createClass(SubtitleTrackController, [{
    key: "subtitleDisplay",
    get: function get() {
      return this._subtitleDisplay;
    },
    set: function set(value) {
      this._subtitleDisplay = value;
      if (this.trackId > -1) {
        this.toggleTrackModes(this.trackId);
      }
    }
  }, {
    key: "subtitleTracks",
    get: function get() {
      return this.tracksInGroup;
    }

    /** get/set index of the selected subtitle track (based on index in subtitle track lists) **/
  }, {
    key: "subtitleTrack",
    get: function get() {
      return this.trackId;
    },
    set: function set(newId) {
      this.selectDefaultTrack = false;
      var lastTrack = this.tracksInGroup ? this.tracksInGroup[this.trackId] : undefined;
      this.setSubtitleTrack(newId, lastTrack);
    }
  }]);
  return SubtitleTrackController;
}(_base_playlist_controller__WEBPACK_IMPORTED_MODULE_2__["default"]);
function filterSubtitleTracks(textTrackList) {
  var tracks = [];
  for (var i = 0; i < textTrackList.length; i++) {
    var track = textTrackList[i];
    // Edge adds a track without a label; we don't want to use it
    if (track.kind === 'subtitles' && track.label) {
      tracks.push(textTrackList[i]);
    }
  }
  return tracks;
}
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (SubtitleTrackController);

/***/ }),

/***/ "./src/controller/timeline-controller.ts":
/*!***********************************************!*\
  !*** ./src/controller/timeline-controller.ts ***!
  \***********************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "TimelineController": () => (/* binding */ TimelineController)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_cea_608_parser__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/cea-608-parser */ "./src/utils/cea-608-parser.ts");
/* harmony import */ var _utils_output_filter__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/output-filter */ "./src/utils/output-filter.ts");
/* harmony import */ var _utils_webvtt_parser__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../utils/webvtt-parser */ "./src/utils/webvtt-parser.ts");
/* harmony import */ var _utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../utils/texttrack-utils */ "./src/utils/texttrack-utils.ts");
/* harmony import */ var _utils_imsc1_ttml_parser__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../utils/imsc1-ttml-parser */ "./src/utils/imsc1-ttml-parser.ts");
/* harmony import */ var _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ../utils/mp4-tools */ "./src/utils/mp4-tools.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_8__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_9__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");











var TimelineController = /*#__PURE__*/function () {
  function TimelineController(hls) {
    this.hls = void 0;
    this.media = null;
    this.config = void 0;
    this.enabled = true;
    this.Cues = void 0;
    this.textTracks = [];
    this.tracks = [];
    this.initPTS = [];
    this.timescale = [];
    this.unparsedVttFrags = [];
    this.captionsTracks = {};
    this.nonNativeCaptionsTracks = {};
    this.cea608Parser1 = void 0;
    this.cea608Parser2 = void 0;
    this.lastSn = -1;
    this.lastPartIndex = -1;
    this.prevCC = -1;
    this.vttCCs = newVTTCCs();
    this.captionsProperties = void 0;
    this.hls = hls;
    this.config = hls.config;
    this.Cues = hls.config.cueHandler;
    this.captionsProperties = {
      textTrack1: {
        label: this.config.captionsTextTrack1Label,
        languageCode: this.config.captionsTextTrack1LanguageCode
      },
      textTrack2: {
        label: this.config.captionsTextTrack2Label,
        languageCode: this.config.captionsTextTrack2LanguageCode
      },
      textTrack3: {
        label: this.config.captionsTextTrack3Label,
        languageCode: this.config.captionsTextTrack3LanguageCode
      },
      textTrack4: {
        label: this.config.captionsTextTrack4Label,
        languageCode: this.config.captionsTextTrack4LanguageCode
      }
    };
    if (this.config.enableCEA708Captions) {
      var channel1 = new _utils_output_filter__WEBPACK_IMPORTED_MODULE_3__["default"](this, 'textTrack1');
      var channel2 = new _utils_output_filter__WEBPACK_IMPORTED_MODULE_3__["default"](this, 'textTrack2');
      var channel3 = new _utils_output_filter__WEBPACK_IMPORTED_MODULE_3__["default"](this, 'textTrack3');
      var channel4 = new _utils_output_filter__WEBPACK_IMPORTED_MODULE_3__["default"](this, 'textTrack4');
      this.cea608Parser1 = new _utils_cea_608_parser__WEBPACK_IMPORTED_MODULE_2__["default"](1, channel1, channel2);
      this.cea608Parser2 = new _utils_cea_608_parser__WEBPACK_IMPORTED_MODULE_2__["default"](3, channel3, channel4);
    }
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADED, this.onManifestLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_TRACKS_UPDATED, this.onSubtitleTracksUpdated, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_LOADING, this.onFragLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_LOADED, this.onFragLoaded, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_PARSING_USERDATA, this.onFragParsingUserdata, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_DECRYPTED, this.onFragDecrypted, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.INIT_PTS_FOUND, this.onInitPtsFound, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_TRACKS_CLEARED, this.onSubtitleTracksCleared, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
  }
  var _proto = TimelineController.prototype;
  _proto.destroy = function destroy() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MEDIA_DETACHING, this.onMediaDetaching, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADED, this.onManifestLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_TRACKS_UPDATED, this.onSubtitleTracksUpdated, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_LOADING, this.onFragLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_LOADED, this.onFragLoaded, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_PARSING_USERDATA, this.onFragParsingUserdata, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_DECRYPTED, this.onFragDecrypted, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.INIT_PTS_FOUND, this.onInitPtsFound, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_TRACKS_CLEARED, this.onSubtitleTracksCleared, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
    // @ts-ignore
    this.hls = this.config = this.cea608Parser1 = this.cea608Parser2 = null;
  };
  _proto.addCues = function addCues(trackName, startTime, endTime, screen, cueRanges) {
    // skip cues which overlap more than 50% with previously parsed time ranges
    var merged = false;
    for (var i = cueRanges.length; i--;) {
      var cueRange = cueRanges[i];
      var overlap = intersection(cueRange[0], cueRange[1], startTime, endTime);
      if (overlap >= 0) {
        cueRange[0] = Math.min(cueRange[0], startTime);
        cueRange[1] = Math.max(cueRange[1], endTime);
        merged = true;
        if (overlap / (endTime - startTime) > 0.5) {
          return;
        }
      }
    }
    if (!merged) {
      cueRanges.push([startTime, endTime]);
    }
    if (this.config.renderTextTracksNatively) {
      var track = this.captionsTracks[trackName];
      this.Cues.newCue(track, startTime, endTime, screen);
    } else {
      var cues = this.Cues.newCue(null, startTime, endTime, screen);
      this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.CUES_PARSED, {
        type: 'captions',
        cues: cues,
        track: trackName
      });
    }
  }

  // Triggered when an initial PTS is found; used for synchronisation of WebVTT.
  ;
  _proto.onInitPtsFound = function onInitPtsFound(event, _ref) {
    var _this = this;
    var frag = _ref.frag,
      id = _ref.id,
      initPTS = _ref.initPTS,
      timescale = _ref.timescale;
    var unparsedVttFrags = this.unparsedVttFrags;
    if (id === 'main') {
      this.initPTS[frag.cc] = initPTS;
      this.timescale[frag.cc] = timescale;
    }

    // Due to asynchronous processing, initial PTS may arrive later than the first VTT fragments are loaded.
    // Parse any unparsed fragments upon receiving the initial PTS.
    if (unparsedVttFrags.length) {
      this.unparsedVttFrags = [];
      unparsedVttFrags.forEach(function (frag) {
        _this.onFragLoaded(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_LOADED, frag);
      });
    }
  };
  _proto.getExistingTrack = function getExistingTrack(trackName) {
    var media = this.media;
    if (media) {
      for (var i = 0; i < media.textTracks.length; i++) {
        var textTrack = media.textTracks[i];
        if (textTrack[trackName]) {
          return textTrack;
        }
      }
    }
    return null;
  };
  _proto.createCaptionsTrack = function createCaptionsTrack(trackName) {
    if (this.config.renderTextTracksNatively) {
      this.createNativeTrack(trackName);
    } else {
      this.createNonNativeTrack(trackName);
    }
  };
  _proto.createNativeTrack = function createNativeTrack(trackName) {
    if (this.captionsTracks[trackName]) {
      return;
    }
    var captionsProperties = this.captionsProperties,
      captionsTracks = this.captionsTracks,
      media = this.media;
    var _captionsProperties$t = captionsProperties[trackName],
      label = _captionsProperties$t.label,
      languageCode = _captionsProperties$t.languageCode;
    // Enable reuse of existing text track.
    var existingTrack = this.getExistingTrack(trackName);
    if (!existingTrack) {
      var textTrack = this.createTextTrack('captions', label, languageCode);
      if (textTrack) {
        // Set a special property on the track so we know it's managed by Hls.js
        textTrack[trackName] = true;
        captionsTracks[trackName] = textTrack;
      }
    } else {
      captionsTracks[trackName] = existingTrack;
      (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_5__.clearCurrentCues)(captionsTracks[trackName]);
      (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_5__.sendAddTrackEvent)(captionsTracks[trackName], media);
    }
  };
  _proto.createNonNativeTrack = function createNonNativeTrack(trackName) {
    if (this.nonNativeCaptionsTracks[trackName]) {
      return;
    }
    // Create a list of a single track for the provider to consume
    var trackProperties = this.captionsProperties[trackName];
    if (!trackProperties) {
      return;
    }
    var label = trackProperties.label;
    var track = {
      _id: trackName,
      label: label,
      kind: 'captions',
      default: trackProperties.media ? !!trackProperties.media.default : false,
      closedCaptions: trackProperties.media
    };
    this.nonNativeCaptionsTracks[trackName] = track;
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.NON_NATIVE_TEXT_TRACKS_FOUND, {
      tracks: [track]
    });
  };
  _proto.createTextTrack = function createTextTrack(kind, label, lang) {
    var media = this.media;
    if (!media) {
      return;
    }
    return media.addTextTrack(kind, label, lang);
  };
  _proto.onMediaAttaching = function onMediaAttaching(event, data) {
    this.media = data.media;
    this._cleanTracks();
  };
  _proto.onMediaDetaching = function onMediaDetaching() {
    var captionsTracks = this.captionsTracks;
    Object.keys(captionsTracks).forEach(function (trackName) {
      (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_5__.clearCurrentCues)(captionsTracks[trackName]);
      delete captionsTracks[trackName];
    });
    this.nonNativeCaptionsTracks = {};
  };
  _proto.onManifestLoading = function onManifestLoading() {
    this.lastSn = -1; // Detect discontinuity in fragment parsing
    this.lastPartIndex = -1;
    this.prevCC = -1;
    this.vttCCs = newVTTCCs(); // Detect discontinuity in subtitle manifests
    this._cleanTracks();
    this.tracks = [];
    this.captionsTracks = {};
    this.nonNativeCaptionsTracks = {};
    this.textTracks = [];
    this.unparsedVttFrags = this.unparsedVttFrags || [];
    this.initPTS = [];
    this.timescale = [];
    if (this.cea608Parser1 && this.cea608Parser2) {
      this.cea608Parser1.reset();
      this.cea608Parser2.reset();
    }
  };
  _proto._cleanTracks = function _cleanTracks() {
    // clear outdated subtitles
    var media = this.media;
    if (!media) {
      return;
    }
    var textTracks = media.textTracks;
    if (textTracks) {
      for (var i = 0; i < textTracks.length; i++) {
        (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_5__.clearCurrentCues)(textTracks[i]);
      }
    }
  };
  _proto.onSubtitleTracksUpdated = function onSubtitleTracksUpdated(event, data) {
    var _this2 = this;
    this.textTracks = [];
    var tracks = data.subtitleTracks || [];
    var hasIMSC1 = tracks.some(function (track) {
      return track.textCodec === _utils_imsc1_ttml_parser__WEBPACK_IMPORTED_MODULE_6__.IMSC1_CODEC;
    });
    if (this.config.enableWebVTT || hasIMSC1 && this.config.enableIMSC1) {
      var sameTracks = this.tracks && tracks && this.tracks.length === tracks.length;
      this.tracks = tracks || [];
      if (this.config.renderTextTracksNatively) {
        var inUseTracks = this.media ? this.media.textTracks : [];
        this.tracks.forEach(function (track, index) {
          var textTrack;
          if (index < inUseTracks.length) {
            var inUseTrack = null;
            for (var i = 0; i < inUseTracks.length; i++) {
              if (canReuseVttTextTrack(inUseTracks[i], track)) {
                inUseTrack = inUseTracks[i];
                break;
              }
            }

            // Reuse tracks with the same label, but do not reuse 608/708 tracks
            if (inUseTrack) {
              textTrack = inUseTrack;
            }
          }
          if (textTrack) {
            (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_5__.clearCurrentCues)(textTrack);
          } else {
            var textTrackKind = _this2._captionsOrSubtitlesFromCharacteristics(track);
            textTrack = _this2.createTextTrack(textTrackKind, track.name, track.lang);
            if (textTrack) {
              textTrack.mode = 'disabled';
            }
          }
          if (textTrack) {
            textTrack.groupId = track.groupId;
            _this2.textTracks.push(textTrack);
          }
        });
      } else if (!sameTracks && this.tracks && this.tracks.length) {
        // Create a list of tracks for the provider to consume
        var tracksList = this.tracks.map(function (track) {
          return {
            label: track.name,
            kind: track.type.toLowerCase(),
            default: track.default,
            subtitleTrack: track
          };
        });
        this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.NON_NATIVE_TEXT_TRACKS_FOUND, {
          tracks: tracksList
        });
      }
    }
  };
  _proto._captionsOrSubtitlesFromCharacteristics = function _captionsOrSubtitlesFromCharacteristics(track) {
    var _track$attrs;
    if ((_track$attrs = track.attrs) !== null && _track$attrs !== void 0 && _track$attrs.CHARACTERISTICS) {
      var transcribesSpokenDialog = /transcribes-spoken-dialog/gi.test(track.attrs.CHARACTERISTICS);
      var describesMusicAndSound = /describes-music-and-sound/gi.test(track.attrs.CHARACTERISTICS);
      if (transcribesSpokenDialog && describesMusicAndSound) {
        return 'captions';
      }
    }
    return 'subtitles';
  };
  _proto.onManifestLoaded = function onManifestLoaded(event, data) {
    var _this3 = this;
    if (this.config.enableCEA708Captions && data.captions) {
      data.captions.forEach(function (captionsTrack) {
        var instreamIdMatch = /(?:CC|SERVICE)([1-4])/.exec(captionsTrack.instreamId);
        if (!instreamIdMatch) {
          return;
        }
        var trackName = "textTrack" + instreamIdMatch[1];
        var trackProperties = _this3.captionsProperties[trackName];
        if (!trackProperties) {
          return;
        }
        trackProperties.label = captionsTrack.name;
        if (captionsTrack.lang) {
          // optional attribute
          trackProperties.languageCode = captionsTrack.lang;
        }
        trackProperties.media = captionsTrack;
      });
    }
  };
  _proto.closedCaptionsForLevel = function closedCaptionsForLevel(frag) {
    var level = this.hls.levels[frag.level];
    return level === null || level === void 0 ? void 0 : level.attrs['CLOSED-CAPTIONS'];
  };
  _proto.onFragLoading = function onFragLoading(event, data) {
    var cea608Parser1 = this.cea608Parser1,
      cea608Parser2 = this.cea608Parser2,
      lastSn = this.lastSn,
      lastPartIndex = this.lastPartIndex;
    if (!this.enabled || !(cea608Parser1 && cea608Parser2)) {
      return;
    }
    // if this frag isn't contiguous, clear the parser so cues with bad start/end times aren't added to the textTrack
    if (data.frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_8__.PlaylistLevelType.MAIN) {
      var _data$part$index, _data$part;
      var sn = data.frag.sn;
      var partIndex = (_data$part$index = data === null || data === void 0 ? void 0 : (_data$part = data.part) === null || _data$part === void 0 ? void 0 : _data$part.index) != null ? _data$part$index : -1;
      if (!(sn === lastSn + 1 || sn === lastSn && partIndex === lastPartIndex + 1)) {
        cea608Parser1.reset();
        cea608Parser2.reset();
      }
      this.lastSn = sn;
      this.lastPartIndex = partIndex;
    }
  };
  _proto.onFragLoaded = function onFragLoaded(event, data) {
    var frag = data.frag,
      payload = data.payload;
    var initPTS = this.initPTS,
      unparsedVttFrags = this.unparsedVttFrags;
    if (frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_8__.PlaylistLevelType.SUBTITLE) {
      // If fragment is subtitle type, parse as WebVTT.
      if (payload.byteLength) {
        // We need an initial synchronisation PTS. Store fragments as long as none has arrived.
        if (!(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(initPTS[frag.cc])) {
          unparsedVttFrags.push(data);
          if (initPTS.length) {
            // finish unsuccessfully, otherwise the subtitle-stream-controller could be blocked from loading new frags.
            this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_FRAG_PROCESSED, {
              success: false,
              frag: frag,
              error: new Error('Missing initial subtitle PTS')
            });
          }
          return;
        }
        var decryptData = frag.decryptdata;
        // fragment after decryption has a stats object
        var decrypted = ('stats' in data);
        // If the subtitles are not encrypted, parse VTTs now. Otherwise, we need to wait.
        if (decryptData == null || !decryptData.encrypted || decrypted) {
          var trackPlaylistMedia = this.tracks[frag.level];
          var vttCCs = this.vttCCs;
          if (!vttCCs[frag.cc]) {
            vttCCs[frag.cc] = {
              start: frag.start,
              prevCC: this.prevCC,
              new: true
            };
            this.prevCC = frag.cc;
          }
          if (trackPlaylistMedia && trackPlaylistMedia.textCodec === _utils_imsc1_ttml_parser__WEBPACK_IMPORTED_MODULE_6__.IMSC1_CODEC) {
            this._parseIMSC1(frag, payload);
          } else {
            this._parseVTTs(frag, payload, vttCCs);
          }
        }
      } else {
        // In case there is no payload, finish unsuccessfully.
        this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_FRAG_PROCESSED, {
          success: false,
          frag: frag,
          error: new Error('Empty subtitle payload')
        });
      }
    }
  };
  _proto._parseIMSC1 = function _parseIMSC1(frag, payload) {
    var _this4 = this;
    var hls = this.hls;
    (0,_utils_imsc1_ttml_parser__WEBPACK_IMPORTED_MODULE_6__.parseIMSC1)(payload, this.initPTS[frag.cc], this.timescale[frag.cc], function (cues) {
      _this4._appendCues(cues, frag.level);
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_FRAG_PROCESSED, {
        success: true,
        frag: frag
      });
    }, function (error) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log("Failed to parse IMSC1: " + error);
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_FRAG_PROCESSED, {
        success: false,
        frag: frag,
        error: error
      });
    });
  };
  _proto._parseVTTs = function _parseVTTs(frag, payload, vttCCs) {
    var _frag$initSegment,
      _this5 = this;
    var hls = this.hls;
    // Parse the WebVTT file contents.
    var payloadWebVTT = (_frag$initSegment = frag.initSegment) !== null && _frag$initSegment !== void 0 && _frag$initSegment.data ? (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_7__.appendUint8Array)(frag.initSegment.data, new Uint8Array(payload)) : payload;
    (0,_utils_webvtt_parser__WEBPACK_IMPORTED_MODULE_4__.parseWebVTT)(payloadWebVTT, this.initPTS[frag.cc], this.timescale[frag.cc], vttCCs, frag.cc, frag.start, function (cues) {
      _this5._appendCues(cues, frag.level);
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_FRAG_PROCESSED, {
        success: true,
        frag: frag
      });
    }, function (error) {
      _this5._fallbackToIMSC1(frag, payload);
      // Something went wrong while parsing. Trigger event with success false.
      _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log("Failed to parse VTT cue: " + error);
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_FRAG_PROCESSED, {
        success: false,
        frag: frag,
        error: error
      });
    });
  };
  _proto._fallbackToIMSC1 = function _fallbackToIMSC1(frag, payload) {
    var _this6 = this;
    // If textCodec is unknown, try parsing as IMSC1. Set textCodec based on the result
    var trackPlaylistMedia = this.tracks[frag.level];
    if (!trackPlaylistMedia.textCodec) {
      (0,_utils_imsc1_ttml_parser__WEBPACK_IMPORTED_MODULE_6__.parseIMSC1)(payload, this.initPTS[frag.cc], this.timescale[frag.cc], function () {
        trackPlaylistMedia.textCodec = _utils_imsc1_ttml_parser__WEBPACK_IMPORTED_MODULE_6__.IMSC1_CODEC;
        _this6._parseIMSC1(frag, payload);
      }, function () {
        trackPlaylistMedia.textCodec = 'wvtt';
      });
    }
  };
  _proto._appendCues = function _appendCues(cues, fragLevel) {
    var hls = this.hls;
    if (this.config.renderTextTracksNatively) {
      var textTrack = this.textTracks[fragLevel];
      // WebVTTParser.parse is an async method and if the currently selected text track mode is set to "disabled"
      // before parsing is done then don't try to access currentTrack.cues.getCueById as cues will be null
      // and trying to access getCueById method of cues will throw an exception
      // Because we check if the mode is disabled, we can force check `cues` below. They can't be null.
      if (!textTrack || textTrack.mode === 'disabled') {
        return;
      }
      cues.forEach(function (cue) {
        return (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_5__.addCueToTrack)(textTrack, cue);
      });
    } else {
      var currentTrack = this.tracks[fragLevel];
      if (!currentTrack) {
        return;
      }
      var track = currentTrack.default ? 'default' : 'subtitles' + fragLevel;
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.CUES_PARSED, {
        type: 'subtitles',
        cues: cues,
        track: track
      });
    }
  };
  _proto.onFragDecrypted = function onFragDecrypted(event, data) {
    var frag = data.frag;
    if (frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_8__.PlaylistLevelType.SUBTITLE) {
      if (!(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(this.initPTS[frag.cc])) {
        this.unparsedVttFrags.push(data);
        return;
      }
      this.onFragLoaded(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_LOADED, data);
    }
  };
  _proto.onSubtitleTracksCleared = function onSubtitleTracksCleared() {
    this.tracks = [];
    this.captionsTracks = {};
  };
  _proto.onFragParsingUserdata = function onFragParsingUserdata(event, data) {
    var cea608Parser1 = this.cea608Parser1,
      cea608Parser2 = this.cea608Parser2;
    if (!this.enabled || !(cea608Parser1 && cea608Parser2)) {
      return;
    }
    var frag = data.frag,
      samples = data.samples;
    if (frag.type === _types_loader__WEBPACK_IMPORTED_MODULE_8__.PlaylistLevelType.MAIN && this.closedCaptionsForLevel(frag) === 'NONE') {
      return;
    }
    // If the event contains captions (found in the bytes property), push all bytes into the parser immediately
    // It will create the proper timestamps based on the PTS value
    for (var i = 0; i < samples.length; i++) {
      var ccBytes = samples[i].bytes;
      if (ccBytes) {
        var ccdatas = this.extractCea608Data(ccBytes);
        cea608Parser1.addData(samples[i].pts, ccdatas[0]);
        cea608Parser2.addData(samples[i].pts, ccdatas[1]);
      }
    }
  };
  _proto.onBufferFlushing = function onBufferFlushing(event, _ref2) {
    var startOffset = _ref2.startOffset,
      endOffset = _ref2.endOffset,
      endOffsetSubtitles = _ref2.endOffsetSubtitles,
      type = _ref2.type;
    var media = this.media;
    if (!media || media.currentTime < endOffset) {
      return;
    }
    // Clear 608 caption cues from the captions TextTracks when the video back buffer is flushed
    // Forward cues are never removed because we can loose streamed 608 content from recent fragments
    if (!type || type === 'video') {
      var captionsTracks = this.captionsTracks;
      Object.keys(captionsTracks).forEach(function (trackName) {
        return (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_5__.removeCuesInRange)(captionsTracks[trackName], startOffset, endOffset);
      });
    }
    if (this.config.renderTextTracksNatively) {
      // Clear VTT/IMSC1 subtitle cues from the subtitle TextTracks when the back buffer is flushed
      if (startOffset === 0 && endOffsetSubtitles !== undefined) {
        var textTracks = this.textTracks;
        Object.keys(textTracks).forEach(function (trackName) {
          return (0,_utils_texttrack_utils__WEBPACK_IMPORTED_MODULE_5__.removeCuesInRange)(textTracks[trackName], startOffset, endOffsetSubtitles);
        });
      }
    }
  };
  _proto.extractCea608Data = function extractCea608Data(byteArray) {
    var actualCCBytes = [[], []];
    var count = byteArray[0] & 0x1f;
    var position = 2;
    for (var j = 0; j < count; j++) {
      var tmpByte = byteArray[position++];
      var ccbyte1 = 0x7f & byteArray[position++];
      var ccbyte2 = 0x7f & byteArray[position++];
      if (ccbyte1 === 0 && ccbyte2 === 0) {
        continue;
      }
      var ccValid = (0x04 & tmpByte) !== 0; // Support all four channels
      if (ccValid) {
        var ccType = 0x03 & tmpByte;
        if (0x00 /* CEA608 field1*/ === ccType || 0x01 /* CEA608 field2*/ === ccType) {
          // Exclude CEA708 CC data.
          actualCCBytes[ccType].push(ccbyte1);
          actualCCBytes[ccType].push(ccbyte2);
        }
      }
    }
    return actualCCBytes;
  };
  return TimelineController;
}();
function canReuseVttTextTrack(inUseTrack, manifestTrack) {
  return inUseTrack && inUseTrack.label === manifestTrack.name && !(inUseTrack.textTrack1 || inUseTrack.textTrack2);
}
function intersection(x1, x2, y1, y2) {
  return Math.min(x2, y2) - Math.max(x1, y1);
}
function newVTTCCs() {
  return {
    ccOffset: 0,
    presentationOffset: 0,
    0: {
      start: 0,
      prevCC: -1,
      new: true
    }
  };
}

/***/ }),

/***/ "./src/crypt/aes-crypto.ts":
/*!*********************************!*\
  !*** ./src/crypt/aes-crypto.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ AESCrypto)
/* harmony export */ });
var AESCrypto = /*#__PURE__*/function () {
  function AESCrypto(subtle, iv) {
    this.subtle = void 0;
    this.aesIV = void 0;
    this.subtle = subtle;
    this.aesIV = iv;
  }
  var _proto = AESCrypto.prototype;
  _proto.decrypt = function decrypt(data, key) {
    return this.subtle.decrypt({
      name: 'AES-CBC',
      iv: this.aesIV
    }, key, data);
  };
  return AESCrypto;
}();


/***/ }),

/***/ "./src/crypt/aes-decryptor.ts":
/*!************************************!*\
  !*** ./src/crypt/aes-decryptor.ts ***!
  \************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ AESDecryptor),
/* harmony export */   "removePadding": () => (/* binding */ removePadding)
/* harmony export */ });
/* harmony import */ var _utils_typed_array__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../utils/typed-array */ "./src/utils/typed-array.ts");


// PKCS7
function removePadding(array) {
  var outputBytes = array.byteLength;
  var paddingBytes = outputBytes && new DataView(array.buffer).getUint8(outputBytes - 1);
  if (paddingBytes) {
    return (0,_utils_typed_array__WEBPACK_IMPORTED_MODULE_0__.sliceUint8)(array, 0, outputBytes - paddingBytes);
  }
  return array;
}
var AESDecryptor = /*#__PURE__*/function () {
  function AESDecryptor() {
    this.rcon = [0x0, 0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36];
    this.subMix = [new Uint32Array(256), new Uint32Array(256), new Uint32Array(256), new Uint32Array(256)];
    this.invSubMix = [new Uint32Array(256), new Uint32Array(256), new Uint32Array(256), new Uint32Array(256)];
    this.sBox = new Uint32Array(256);
    this.invSBox = new Uint32Array(256);
    this.key = new Uint32Array(0);
    this.ksRows = 0;
    this.keySize = 0;
    this.keySchedule = void 0;
    this.invKeySchedule = void 0;
    this.initTable();
  }

  // Using view.getUint32() also swaps the byte order.
  var _proto = AESDecryptor.prototype;
  _proto.uint8ArrayToUint32Array_ = function uint8ArrayToUint32Array_(arrayBuffer) {
    var view = new DataView(arrayBuffer);
    var newArray = new Uint32Array(4);
    for (var i = 0; i < 4; i++) {
      newArray[i] = view.getUint32(i * 4);
    }
    return newArray;
  };
  _proto.initTable = function initTable() {
    var sBox = this.sBox;
    var invSBox = this.invSBox;
    var subMix = this.subMix;
    var subMix0 = subMix[0];
    var subMix1 = subMix[1];
    var subMix2 = subMix[2];
    var subMix3 = subMix[3];
    var invSubMix = this.invSubMix;
    var invSubMix0 = invSubMix[0];
    var invSubMix1 = invSubMix[1];
    var invSubMix2 = invSubMix[2];
    var invSubMix3 = invSubMix[3];
    var d = new Uint32Array(256);
    var x = 0;
    var xi = 0;
    var i = 0;
    for (i = 0; i < 256; i++) {
      if (i < 128) {
        d[i] = i << 1;
      } else {
        d[i] = i << 1 ^ 0x11b;
      }
    }
    for (i = 0; i < 256; i++) {
      var sx = xi ^ xi << 1 ^ xi << 2 ^ xi << 3 ^ xi << 4;
      sx = sx >>> 8 ^ sx & 0xff ^ 0x63;
      sBox[x] = sx;
      invSBox[sx] = x;

      // Compute multiplication
      var x2 = d[x];
      var x4 = d[x2];
      var x8 = d[x4];

      // Compute sub/invSub bytes, mix columns tables
      var t = d[sx] * 0x101 ^ sx * 0x1010100;
      subMix0[x] = t << 24 | t >>> 8;
      subMix1[x] = t << 16 | t >>> 16;
      subMix2[x] = t << 8 | t >>> 24;
      subMix3[x] = t;

      // Compute inv sub bytes, inv mix columns tables
      t = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;
      invSubMix0[sx] = t << 24 | t >>> 8;
      invSubMix1[sx] = t << 16 | t >>> 16;
      invSubMix2[sx] = t << 8 | t >>> 24;
      invSubMix3[sx] = t;

      // Compute next counter
      if (!x) {
        x = xi = 1;
      } else {
        x = x2 ^ d[d[d[x8 ^ x2]]];
        xi ^= d[d[xi]];
      }
    }
  };
  _proto.expandKey = function expandKey(keyBuffer) {
    // convert keyBuffer to Uint32Array
    var key = this.uint8ArrayToUint32Array_(keyBuffer);
    var sameKey = true;
    var offset = 0;
    while (offset < key.length && sameKey) {
      sameKey = key[offset] === this.key[offset];
      offset++;
    }
    if (sameKey) {
      return;
    }
    this.key = key;
    var keySize = this.keySize = key.length;
    if (keySize !== 4 && keySize !== 6 && keySize !== 8) {
      throw new Error('Invalid aes key size=' + keySize);
    }
    var ksRows = this.ksRows = (keySize + 6 + 1) * 4;
    var ksRow;
    var invKsRow;
    var keySchedule = this.keySchedule = new Uint32Array(ksRows);
    var invKeySchedule = this.invKeySchedule = new Uint32Array(ksRows);
    var sbox = this.sBox;
    var rcon = this.rcon;
    var invSubMix = this.invSubMix;
    var invSubMix0 = invSubMix[0];
    var invSubMix1 = invSubMix[1];
    var invSubMix2 = invSubMix[2];
    var invSubMix3 = invSubMix[3];
    var prev;
    var t;
    for (ksRow = 0; ksRow < ksRows; ksRow++) {
      if (ksRow < keySize) {
        prev = keySchedule[ksRow] = key[ksRow];
        continue;
      }
      t = prev;
      if (ksRow % keySize === 0) {
        // Rot word
        t = t << 8 | t >>> 24;

        // Sub word
        t = sbox[t >>> 24] << 24 | sbox[t >>> 16 & 0xff] << 16 | sbox[t >>> 8 & 0xff] << 8 | sbox[t & 0xff];

        // Mix Rcon
        t ^= rcon[ksRow / keySize | 0] << 24;
      } else if (keySize > 6 && ksRow % keySize === 4) {
        // Sub word
        t = sbox[t >>> 24] << 24 | sbox[t >>> 16 & 0xff] << 16 | sbox[t >>> 8 & 0xff] << 8 | sbox[t & 0xff];
      }
      keySchedule[ksRow] = prev = (keySchedule[ksRow - keySize] ^ t) >>> 0;
    }
    for (invKsRow = 0; invKsRow < ksRows; invKsRow++) {
      ksRow = ksRows - invKsRow;
      if (invKsRow & 3) {
        t = keySchedule[ksRow];
      } else {
        t = keySchedule[ksRow - 4];
      }
      if (invKsRow < 4 || ksRow <= 4) {
        invKeySchedule[invKsRow] = t;
      } else {
        invKeySchedule[invKsRow] = invSubMix0[sbox[t >>> 24]] ^ invSubMix1[sbox[t >>> 16 & 0xff]] ^ invSubMix2[sbox[t >>> 8 & 0xff]] ^ invSubMix3[sbox[t & 0xff]];
      }
      invKeySchedule[invKsRow] = invKeySchedule[invKsRow] >>> 0;
    }
  }

  // Adding this as a method greatly improves performance.
  ;
  _proto.networkToHostOrderSwap = function networkToHostOrderSwap(word) {
    return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;
  };
  _proto.decrypt = function decrypt(inputArrayBuffer, offset, aesIV) {
    var nRounds = this.keySize + 6;
    var invKeySchedule = this.invKeySchedule;
    var invSBOX = this.invSBox;
    var invSubMix = this.invSubMix;
    var invSubMix0 = invSubMix[0];
    var invSubMix1 = invSubMix[1];
    var invSubMix2 = invSubMix[2];
    var invSubMix3 = invSubMix[3];
    var initVector = this.uint8ArrayToUint32Array_(aesIV);
    var initVector0 = initVector[0];
    var initVector1 = initVector[1];
    var initVector2 = initVector[2];
    var initVector3 = initVector[3];
    var inputInt32 = new Int32Array(inputArrayBuffer);
    var outputInt32 = new Int32Array(inputInt32.length);
    var t0, t1, t2, t3;
    var s0, s1, s2, s3;
    var inputWords0, inputWords1, inputWords2, inputWords3;
    var ksRow, i;
    var swapWord = this.networkToHostOrderSwap;
    while (offset < inputInt32.length) {
      inputWords0 = swapWord(inputInt32[offset]);
      inputWords1 = swapWord(inputInt32[offset + 1]);
      inputWords2 = swapWord(inputInt32[offset + 2]);
      inputWords3 = swapWord(inputInt32[offset + 3]);
      s0 = inputWords0 ^ invKeySchedule[0];
      s1 = inputWords3 ^ invKeySchedule[1];
      s2 = inputWords2 ^ invKeySchedule[2];
      s3 = inputWords1 ^ invKeySchedule[3];
      ksRow = 4;

      // Iterate through the rounds of decryption
      for (i = 1; i < nRounds; i++) {
        t0 = invSubMix0[s0 >>> 24] ^ invSubMix1[s1 >> 16 & 0xff] ^ invSubMix2[s2 >> 8 & 0xff] ^ invSubMix3[s3 & 0xff] ^ invKeySchedule[ksRow];
        t1 = invSubMix0[s1 >>> 24] ^ invSubMix1[s2 >> 16 & 0xff] ^ invSubMix2[s3 >> 8 & 0xff] ^ invSubMix3[s0 & 0xff] ^ invKeySchedule[ksRow + 1];
        t2 = invSubMix0[s2 >>> 24] ^ invSubMix1[s3 >> 16 & 0xff] ^ invSubMix2[s0 >> 8 & 0xff] ^ invSubMix3[s1 & 0xff] ^ invKeySchedule[ksRow + 2];
        t3 = invSubMix0[s3 >>> 24] ^ invSubMix1[s0 >> 16 & 0xff] ^ invSubMix2[s1 >> 8 & 0xff] ^ invSubMix3[s2 & 0xff] ^ invKeySchedule[ksRow + 3];
        // Update state
        s0 = t0;
        s1 = t1;
        s2 = t2;
        s3 = t3;
        ksRow = ksRow + 4;
      }

      // Shift rows, sub bytes, add round key
      t0 = invSBOX[s0 >>> 24] << 24 ^ invSBOX[s1 >> 16 & 0xff] << 16 ^ invSBOX[s2 >> 8 & 0xff] << 8 ^ invSBOX[s3 & 0xff] ^ invKeySchedule[ksRow];
      t1 = invSBOX[s1 >>> 24] << 24 ^ invSBOX[s2 >> 16 & 0xff] << 16 ^ invSBOX[s3 >> 8 & 0xff] << 8 ^ invSBOX[s0 & 0xff] ^ invKeySchedule[ksRow + 1];
      t2 = invSBOX[s2 >>> 24] << 24 ^ invSBOX[s3 >> 16 & 0xff] << 16 ^ invSBOX[s0 >> 8 & 0xff] << 8 ^ invSBOX[s1 & 0xff] ^ invKeySchedule[ksRow + 2];
      t3 = invSBOX[s3 >>> 24] << 24 ^ invSBOX[s0 >> 16 & 0xff] << 16 ^ invSBOX[s1 >> 8 & 0xff] << 8 ^ invSBOX[s2 & 0xff] ^ invKeySchedule[ksRow + 3];

      // Write
      outputInt32[offset] = swapWord(t0 ^ initVector0);
      outputInt32[offset + 1] = swapWord(t3 ^ initVector1);
      outputInt32[offset + 2] = swapWord(t2 ^ initVector2);
      outputInt32[offset + 3] = swapWord(t1 ^ initVector3);

      // reset initVector to last 4 unsigned int
      initVector0 = inputWords0;
      initVector1 = inputWords1;
      initVector2 = inputWords2;
      initVector3 = inputWords3;
      offset = offset + 4;
    }
    return outputInt32.buffer;
  };
  return AESDecryptor;
}();


/***/ }),

/***/ "./src/crypt/decrypter.ts":
/*!********************************!*\
  !*** ./src/crypt/decrypter.ts ***!
  \********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ Decrypter)
/* harmony export */ });
/* harmony import */ var _aes_crypto__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./aes-crypto */ "./src/crypt/aes-crypto.ts");
/* harmony import */ var _fast_aes_key__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./fast-aes-key */ "./src/crypt/fast-aes-key.ts");
/* harmony import */ var _aes_decryptor__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./aes-decryptor */ "./src/crypt/aes-decryptor.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../utils/mp4-tools */ "./src/utils/mp4-tools.ts");
/* harmony import */ var _utils_typed_array__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../utils/typed-array */ "./src/utils/typed-array.ts");






var CHUNK_SIZE = 16; // 16 bytes, 128 bits
var Decrypter = /*#__PURE__*/function () {
  function Decrypter(config, _temp) {
    var _ref = _temp === void 0 ? {} : _temp,
      _ref$removePKCS7Paddi = _ref.removePKCS7Padding,
      removePKCS7Padding = _ref$removePKCS7Paddi === void 0 ? true : _ref$removePKCS7Paddi;
    this.logEnabled = true;
    this.removePKCS7Padding = void 0;
    this.subtle = null;
    this.softwareDecrypter = null;
    this.key = null;
    this.fastAesKey = null;
    this.remainderData = null;
    this.currentIV = null;
    this.currentResult = null;
    this.useSoftware = void 0;
    this.useSoftware = config.enableSoftwareAES;
    this.removePKCS7Padding = removePKCS7Padding;
    // built in decryptor expects PKCS7 padding
    if (removePKCS7Padding) {
      try {
        var browserCrypto = self.crypto;
        if (browserCrypto) {
          this.subtle = browserCrypto.subtle || browserCrypto.webkitSubtle;
        }
      } catch (e) {
        /* no-op */
      }
    }
    if (this.subtle === null) {
      this.useSoftware = true;
    }
  }
  var _proto = Decrypter.prototype;
  _proto.destroy = function destroy() {
    this.subtle = null;
    this.softwareDecrypter = null;
    this.key = null;
    this.fastAesKey = null;
    this.remainderData = null;
    this.currentIV = null;
    this.currentResult = null;
  };
  _proto.isSync = function isSync() {
    return this.useSoftware;
  };
  _proto.flush = function flush() {
    var currentResult = this.currentResult,
      remainderData = this.remainderData;
    if (!currentResult || remainderData) {
      this.reset();
      return null;
    }
    var data = new Uint8Array(currentResult);
    this.reset();
    if (this.removePKCS7Padding) {
      return (0,_aes_decryptor__WEBPACK_IMPORTED_MODULE_2__.removePadding)(data);
    }
    return data;
  };
  _proto.reset = function reset() {
    this.currentResult = null;
    this.currentIV = null;
    this.remainderData = null;
    if (this.softwareDecrypter) {
      this.softwareDecrypter = null;
    }
  };
  _proto.decrypt = function decrypt(data, key, iv) {
    var _this = this;
    if (this.useSoftware) {
      return new Promise(function (resolve, reject) {
        _this.softwareDecrypt(new Uint8Array(data), key, iv);
        var decryptResult = _this.flush();
        if (decryptResult) {
          resolve(decryptResult.buffer);
        } else {
          reject(new Error('[softwareDecrypt] Failed to decrypt data'));
        }
      });
    }
    return this.webCryptoDecrypt(new Uint8Array(data), key, iv);
  }

  // Software decryption is progressive. Progressive decryption may not return a result on each call. Any cached
  // data is handled in the flush() call
  ;
  _proto.softwareDecrypt = function softwareDecrypt(data, key, iv) {
    var currentIV = this.currentIV,
      currentResult = this.currentResult,
      remainderData = this.remainderData;
    this.logOnce('JS AES decrypt');
    // The output is staggered during progressive parsing - the current result is cached, and emitted on the next call
    // This is done in order to strip PKCS7 padding, which is found at the end of each segment. We only know we've reached
    // the end on flush(), but by that time we have already received all bytes for the segment.
    // Progressive decryption does not work with WebCrypto

    if (remainderData) {
      data = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_4__.appendUint8Array)(remainderData, data);
      this.remainderData = null;
    }

    // Byte length must be a multiple of 16 (AES-128 = 128 bit blocks = 16 bytes)
    var currentChunk = this.getValidChunk(data);
    if (!currentChunk.length) {
      return null;
    }
    if (currentIV) {
      iv = currentIV;
    }
    var softwareDecrypter = this.softwareDecrypter;
    if (!softwareDecrypter) {
      softwareDecrypter = this.softwareDecrypter = new _aes_decryptor__WEBPACK_IMPORTED_MODULE_2__["default"]();
    }
    softwareDecrypter.expandKey(key);
    var result = currentResult;
    this.currentResult = softwareDecrypter.decrypt(currentChunk.buffer, 0, iv);
    this.currentIV = (0,_utils_typed_array__WEBPACK_IMPORTED_MODULE_5__.sliceUint8)(currentChunk, -16).buffer;
    if (!result) {
      return null;
    }
    return result;
  };
  _proto.webCryptoDecrypt = function webCryptoDecrypt(data, key, iv) {
    var _this2 = this;
    var subtle = this.subtle;
    if (this.key !== key || !this.fastAesKey) {
      this.key = key;
      this.fastAesKey = new _fast_aes_key__WEBPACK_IMPORTED_MODULE_1__["default"](subtle, key);
    }
    return this.fastAesKey.expandKey().then(function (aesKey) {
      // decrypt using web crypto
      if (!subtle) {
        return Promise.reject(new Error('web crypto not initialized'));
      }
      _this2.logOnce('WebCrypto AES decrypt');
      var crypto = new _aes_crypto__WEBPACK_IMPORTED_MODULE_0__["default"](subtle, new Uint8Array(iv));
      return crypto.decrypt(data.buffer, aesKey);
    }).catch(function (err) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn("[decrypter]: WebCrypto Error, disable WebCrypto API, " + err.name + ": " + err.message);
      return _this2.onWebCryptoError(data, key, iv);
    });
  };
  _proto.onWebCryptoError = function onWebCryptoError(data, key, iv) {
    this.useSoftware = true;
    this.logEnabled = true;
    this.softwareDecrypt(data, key, iv);
    var decryptResult = this.flush();
    if (decryptResult) {
      return decryptResult.buffer;
    }
    throw new Error('WebCrypto and softwareDecrypt: failed to decrypt data');
  };
  _proto.getValidChunk = function getValidChunk(data) {
    var currentChunk = data;
    var splitPoint = data.length - data.length % CHUNK_SIZE;
    if (splitPoint !== data.length) {
      currentChunk = (0,_utils_typed_array__WEBPACK_IMPORTED_MODULE_5__.sliceUint8)(data, 0, splitPoint);
      this.remainderData = (0,_utils_typed_array__WEBPACK_IMPORTED_MODULE_5__.sliceUint8)(data, splitPoint);
    }
    return currentChunk;
  };
  _proto.logOnce = function logOnce(msg) {
    if (!this.logEnabled) {
      return;
    }
    _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.log("[decrypter]: " + msg);
    this.logEnabled = false;
  };
  return Decrypter;
}();


/***/ }),

/***/ "./src/crypt/fast-aes-key.ts":
/*!***********************************!*\
  !*** ./src/crypt/fast-aes-key.ts ***!
  \***********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ FastAESKey)
/* harmony export */ });
var FastAESKey = /*#__PURE__*/function () {
  function FastAESKey(subtle, key) {
    this.subtle = void 0;
    this.key = void 0;
    this.subtle = subtle;
    this.key = key;
  }
  var _proto = FastAESKey.prototype;
  _proto.expandKey = function expandKey() {
    return this.subtle.importKey('raw', this.key, {
      name: 'AES-CBC'
    }, false, ['encrypt', 'decrypt']);
  };
  return FastAESKey;
}();


/***/ }),

/***/ "./src/demux/aacdemuxer.ts":
/*!*********************************!*\
  !*** ./src/demux/aacdemuxer.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _base_audio_demuxer__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./base-audio-demuxer */ "./src/demux/base-audio-demuxer.ts");
/* harmony import */ var _adts__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./adts */ "./src/demux/adts.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _demux_id3__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../demux/id3 */ "./src/demux/id3.ts");
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
/**
 * AAC demuxer
 */




var AACDemuxer = /*#__PURE__*/function (_BaseAudioDemuxer) {
  _inheritsLoose(AACDemuxer, _BaseAudioDemuxer);
  function AACDemuxer(observer, config) {
    var _this;
    _this = _BaseAudioDemuxer.call(this) || this;
    _this.observer = void 0;
    _this.config = void 0;
    _this.observer = observer;
    _this.config = config;
    return _this;
  }
  var _proto = AACDemuxer.prototype;
  _proto.resetInitSegment = function resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration) {
    _BaseAudioDemuxer.prototype.resetInitSegment.call(this, initSegment, audioCodec, videoCodec, trackDuration);
    this._audioTrack = {
      container: 'audio/adts',
      type: 'audio',
      id: 2,
      pid: -1,
      sequenceNumber: 0,
      segmentCodec: 'aac',
      samples: [],
      manifestCodec: audioCodec,
      duration: trackDuration,
      inputTimeScale: 90000,
      dropped: 0
    };
  }

  // Source for probe info - https://wiki.multimedia.cx/index.php?title=ADTS
  ;
  AACDemuxer.probe = function probe(data) {
    if (!data) {
      return false;
    }

    // Check for the ADTS sync word
    // Look for ADTS header | 1111 1111 | 1111 X00X | where X can be either 0 or 1
    // Layer bits (position 14 and 15) in header should be always 0 for ADTS
    // More info https://wiki.multimedia.cx/index.php?title=ADTS
    var id3Data = _demux_id3__WEBPACK_IMPORTED_MODULE_3__.getID3Data(data, 0) || [];
    var offset = id3Data.length;
    for (var length = data.length; offset < length; offset++) {
      if (_adts__WEBPACK_IMPORTED_MODULE_1__.probe(data, offset)) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log('ADTS sync word found !');
        return true;
      }
    }
    return false;
  };
  _proto.canParse = function canParse(data, offset) {
    return _adts__WEBPACK_IMPORTED_MODULE_1__.canParse(data, offset);
  };
  _proto.appendFrame = function appendFrame(track, data, offset) {
    _adts__WEBPACK_IMPORTED_MODULE_1__.initTrackConfig(track, this.observer, data, offset, track.manifestCodec);
    var frame = _adts__WEBPACK_IMPORTED_MODULE_1__.appendFrame(track, data, offset, this.basePTS, this.frameIndex);
    if (frame && frame.missing === 0) {
      return frame;
    }
  };
  return AACDemuxer;
}(_base_audio_demuxer__WEBPACK_IMPORTED_MODULE_0__["default"]);
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (AACDemuxer);

/***/ }),

/***/ "./src/demux/adts.ts":
/*!***************************!*\
  !*** ./src/demux/adts.ts ***!
  \***************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "appendFrame": () => (/* binding */ appendFrame),
/* harmony export */   "canGetFrameLength": () => (/* binding */ canGetFrameLength),
/* harmony export */   "canParse": () => (/* binding */ canParse),
/* harmony export */   "getAudioConfig": () => (/* binding */ getAudioConfig),
/* harmony export */   "getFrameDuration": () => (/* binding */ getFrameDuration),
/* harmony export */   "getFullFrameLength": () => (/* binding */ getFullFrameLength),
/* harmony export */   "getHeaderLength": () => (/* binding */ getHeaderLength),
/* harmony export */   "initTrackConfig": () => (/* binding */ initTrackConfig),
/* harmony export */   "isHeader": () => (/* binding */ isHeader),
/* harmony export */   "isHeaderPattern": () => (/* binding */ isHeaderPattern),
/* harmony export */   "parseFrameHeader": () => (/* binding */ parseFrameHeader),
/* harmony export */   "probe": () => (/* binding */ probe)
/* harmony export */ });
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/**
 * ADTS parser helper
 * @link https://wiki.multimedia.cx/index.php?title=ADTS
 */



function getAudioConfig(observer, data, offset, audioCodec) {
  var adtsObjectType;
  var adtsExtensionSamplingIndex;
  var adtsChannelConfig;
  var config;
  var userAgent = navigator.userAgent.toLowerCase();
  var manifestCodec = audioCodec;
  var adtsSamplingRates = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];
  // byte 2
  adtsObjectType = ((data[offset + 2] & 0xc0) >>> 6) + 1;
  var adtsSamplingIndex = (data[offset + 2] & 0x3c) >>> 2;
  if (adtsSamplingIndex > adtsSamplingRates.length - 1) {
    observer.trigger(_events__WEBPACK_IMPORTED_MODULE_2__.Events.ERROR, {
      type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.MEDIA_ERROR,
      details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.FRAG_PARSING_ERROR,
      fatal: true,
      reason: "invalid ADTS sampling index:" + adtsSamplingIndex
    });
    return;
  }
  adtsChannelConfig = (data[offset + 2] & 0x01) << 2;
  // byte 3
  adtsChannelConfig |= (data[offset + 3] & 0xc0) >>> 6;
  _utils_logger__WEBPACK_IMPORTED_MODULE_0__.logger.log("manifest codec:" + audioCodec + ", ADTS type:" + adtsObjectType + ", samplingIndex:" + adtsSamplingIndex);
  // firefox: freq less than 24kHz = AAC SBR (HE-AAC)
  if (/firefox/i.test(userAgent)) {
    if (adtsSamplingIndex >= 6) {
      adtsObjectType = 5;
      config = new Array(4);
      // HE-AAC uses SBR (Spectral Band Replication) , high frequencies are constructed from low frequencies
      // there is a factor 2 between frame sample rate and output sample rate
      // multiply frequency by 2 (see table below, equivalent to substract 3)
      adtsExtensionSamplingIndex = adtsSamplingIndex - 3;
    } else {
      adtsObjectType = 2;
      config = new Array(2);
      adtsExtensionSamplingIndex = adtsSamplingIndex;
    }
    // Android : always use AAC
  } else if (userAgent.indexOf('android') !== -1) {
    adtsObjectType = 2;
    config = new Array(2);
    adtsExtensionSamplingIndex = adtsSamplingIndex;
  } else {
    /*  for other browsers (Chrome/Vivaldi/Opera ...)
        always force audio type to be HE-AAC SBR, as some browsers do not support audio codec switch properly (like Chrome ...)
    */
    adtsObjectType = 5;
    config = new Array(4);
    // if (manifest codec is HE-AAC or HE-AACv2) OR (manifest codec not specified AND frequency less than 24kHz)
    if (audioCodec && (audioCodec.indexOf('mp4a.40.29') !== -1 || audioCodec.indexOf('mp4a.40.5') !== -1) || !audioCodec && adtsSamplingIndex >= 6) {
      // HE-AAC uses SBR (Spectral Band Replication) , high frequencies are constructed from low frequencies
      // there is a factor 2 between frame sample rate and output sample rate
      // multiply frequency by 2 (see table below, equivalent to substract 3)
      adtsExtensionSamplingIndex = adtsSamplingIndex - 3;
    } else {
      // if (manifest codec is AAC) AND (frequency less than 24kHz AND nb channel is 1) OR (manifest codec not specified and mono audio)
      // Chrome fails to play back with low frequency AAC LC mono when initialized with HE-AAC.  This is not a problem with stereo.
      if (audioCodec && audioCodec.indexOf('mp4a.40.2') !== -1 && (adtsSamplingIndex >= 6 && adtsChannelConfig === 1 || /vivaldi/i.test(userAgent)) || !audioCodec && adtsChannelConfig === 1) {
        adtsObjectType = 2;
        config = new Array(2);
      }
      adtsExtensionSamplingIndex = adtsSamplingIndex;
    }
  }
  /* refer to http://wiki.multimedia.cx/index.php?title=MPEG-4_Audio#Audio_Specific_Config
      ISO 14496-3 (AAC).pdf - Table 1.13 — Syntax of AudioSpecificConfig()
    Audio Profile / Audio Object Type
    0: Null
    1: AAC Main
    2: AAC LC (Low Complexity)
    3: AAC SSR (Scalable Sample Rate)
    4: AAC LTP (Long Term Prediction)
    5: SBR (Spectral Band Replication)
    6: AAC Scalable
   sampling freq
    0: 96000 Hz
    1: 88200 Hz
    2: 64000 Hz
    3: 48000 Hz
    4: 44100 Hz
    5: 32000 Hz
    6: 24000 Hz
    7: 22050 Hz
    8: 16000 Hz
    9: 12000 Hz
    10: 11025 Hz
    11: 8000 Hz
    12: 7350 Hz
    13: Reserved
    14: Reserved
    15: frequency is written explictly
    Channel Configurations
    These are the channel configurations:
    0: Defined in AOT Specifc Config
    1: 1 channel: front-center
    2: 2 channels: front-left, front-right
  */
  // audioObjectType = profile => profile, the MPEG-4 Audio Object Type minus 1
  config[0] = adtsObjectType << 3;
  // samplingFrequencyIndex
  config[0] |= (adtsSamplingIndex & 0x0e) >> 1;
  config[1] |= (adtsSamplingIndex & 0x01) << 7;
  // channelConfiguration
  config[1] |= adtsChannelConfig << 3;
  if (adtsObjectType === 5) {
    // adtsExtensionSamplingIndex
    config[1] |= (adtsExtensionSamplingIndex & 0x0e) >> 1;
    config[2] = (adtsExtensionSamplingIndex & 0x01) << 7;
    // adtsObjectType (force to 2, chrome is checking that object type is less than 5 ???
    //    https://chromium.googlesource.com/chromium/src.git/+/master/media/formats/mp4/aac.cc
    config[2] |= 2 << 2;
    config[3] = 0;
  }
  return {
    config: config,
    samplerate: adtsSamplingRates[adtsSamplingIndex],
    channelCount: adtsChannelConfig,
    codec: 'mp4a.40.' + adtsObjectType,
    manifestCodec: manifestCodec
  };
}
function isHeaderPattern(data, offset) {
  return data[offset] === 0xff && (data[offset + 1] & 0xf6) === 0xf0;
}
function getHeaderLength(data, offset) {
  return data[offset + 1] & 0x01 ? 7 : 9;
}
function getFullFrameLength(data, offset) {
  return (data[offset + 3] & 0x03) << 11 | data[offset + 4] << 3 | (data[offset + 5] & 0xe0) >>> 5;
}
function canGetFrameLength(data, offset) {
  return offset + 5 < data.length;
}
function isHeader(data, offset) {
  // Look for ADTS header | 1111 1111 | 1111 X00X | where X can be either 0 or 1
  // Layer bits (position 14 and 15) in header should be always 0 for ADTS
  // More info https://wiki.multimedia.cx/index.php?title=ADTS
  return offset + 1 < data.length && isHeaderPattern(data, offset);
}
function canParse(data, offset) {
  return canGetFrameLength(data, offset) && isHeaderPattern(data, offset) && getFullFrameLength(data, offset) <= data.length - offset;
}
function probe(data, offset) {
  // same as isHeader but we also check that ADTS frame follows last ADTS frame
  // or end of data is reached
  if (isHeader(data, offset)) {
    // ADTS header Length
    var headerLength = getHeaderLength(data, offset);
    if (offset + headerLength >= data.length) {
      return false;
    }
    // ADTS frame Length
    var frameLength = getFullFrameLength(data, offset);
    if (frameLength <= headerLength) {
      return false;
    }
    var newOffset = offset + frameLength;
    return newOffset === data.length || isHeader(data, newOffset);
  }
  return false;
}
function initTrackConfig(track, observer, data, offset, audioCodec) {
  if (!track.samplerate) {
    var config = getAudioConfig(observer, data, offset, audioCodec);
    if (!config) {
      return;
    }
    track.config = config.config;
    track.samplerate = config.samplerate;
    track.channelCount = config.channelCount;
    track.codec = config.codec;
    track.manifestCodec = config.manifestCodec;
    _utils_logger__WEBPACK_IMPORTED_MODULE_0__.logger.log("parsed codec:" + track.codec + ", rate:" + config.samplerate + ", channels:" + config.channelCount);
  }
}
function getFrameDuration(samplerate) {
  return 1024 * 90000 / samplerate;
}
function parseFrameHeader(data, offset) {
  // The protection skip bit tells us if we have 2 bytes of CRC data at the end of the ADTS header
  var headerLength = getHeaderLength(data, offset);
  if (offset + headerLength <= data.length) {
    // retrieve frame size
    var frameLength = getFullFrameLength(data, offset) - headerLength;
    if (frameLength > 0) {
      // logger.log(`AAC frame, offset/length/total/pts:${offset+headerLength}/${frameLength}/${data.byteLength}`);
      return {
        headerLength: headerLength,
        frameLength: frameLength
      };
    }
  }
}
function appendFrame(track, data, offset, pts, frameIndex) {
  var frameDuration = getFrameDuration(track.samplerate);
  var stamp = pts + frameIndex * frameDuration;
  var header = parseFrameHeader(data, offset);
  var unit;
  if (header) {
    var frameLength = header.frameLength,
      headerLength = header.headerLength;
    var _length = headerLength + frameLength;
    var missing = Math.max(0, offset + _length - data.length);
    // logger.log(`AAC frame ${frameIndex}, pts:${stamp} length@offset/total: ${frameLength}@${offset+headerLength}/${data.byteLength} missing: ${missing}`);
    if (missing) {
      unit = new Uint8Array(_length - headerLength);
      unit.set(data.subarray(offset + headerLength, data.length), 0);
    } else {
      unit = data.subarray(offset + headerLength, offset + _length);
    }
    var _sample = {
      unit: unit,
      pts: stamp
    };
    if (!missing) {
      track.samples.push(_sample);
    }
    return {
      sample: _sample,
      length: _length,
      missing: missing
    };
  }
  // overflow incomplete header
  var length = data.length - offset;
  unit = new Uint8Array(length);
  unit.set(data.subarray(offset, data.length), 0);
  var sample = {
    unit: unit,
    pts: stamp
  };
  return {
    sample: sample,
    length: length,
    missing: -1
  };
}

/***/ }),

/***/ "./src/demux/base-audio-demuxer.ts":
/*!*****************************************!*\
  !*** ./src/demux/base-audio-demuxer.ts ***!
  \*****************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__),
/* harmony export */   "initPTSFn": () => (/* binding */ initPTSFn)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _demux_id3__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../demux/id3 */ "./src/demux/id3.ts");
/* harmony import */ var _types_demuxer__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../types/demuxer */ "./src/types/demuxer.ts");
/* harmony import */ var _dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ./dummy-demuxed-track */ "./src/demux/dummy-demuxed-track.ts");
/* harmony import */ var _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../utils/mp4-tools */ "./src/utils/mp4-tools.ts");
/* harmony import */ var _utils_typed_array__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../utils/typed-array */ "./src/utils/typed-array.ts");







var BaseAudioDemuxer = /*#__PURE__*/function () {
  function BaseAudioDemuxer() {
    this._audioTrack = void 0;
    this._id3Track = void 0;
    this.frameIndex = 0;
    this.cachedData = null;
    this.basePTS = null;
    this.initPTS = null;
    this.lastPTS = null;
  }
  var _proto = BaseAudioDemuxer.prototype;
  _proto.resetInitSegment = function resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration) {
    this._id3Track = {
      type: 'id3',
      id: 3,
      pid: -1,
      inputTimeScale: 90000,
      sequenceNumber: 0,
      samples: [],
      dropped: 0
    };
  };
  _proto.resetTimeStamp = function resetTimeStamp(deaultTimestamp) {
    this.initPTS = deaultTimestamp;
    this.resetContiguity();
  };
  _proto.resetContiguity = function resetContiguity() {
    this.basePTS = null;
    this.lastPTS = null;
    this.frameIndex = 0;
  };
  _proto.canParse = function canParse(data, offset) {
    return false;
  };
  _proto.appendFrame = function appendFrame(track, data, offset) {}

  // feed incoming data to the front of the parsing pipeline
  ;
  _proto.demux = function demux(data, timeOffset) {
    if (this.cachedData) {
      data = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_4__.appendUint8Array)(this.cachedData, data);
      this.cachedData = null;
    }
    var id3Data = _demux_id3__WEBPACK_IMPORTED_MODULE_1__.getID3Data(data, 0);
    var offset = id3Data ? id3Data.length : 0;
    var lastDataIndex;
    var track = this._audioTrack;
    var id3Track = this._id3Track;
    var timestamp = id3Data ? _demux_id3__WEBPACK_IMPORTED_MODULE_1__.getTimeStamp(id3Data) : undefined;
    var length = data.length;
    if (this.basePTS === null || this.frameIndex === 0 && (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(timestamp)) {
      this.basePTS = initPTSFn(timestamp, timeOffset, this.initPTS);
      this.lastPTS = this.basePTS;
    }
    if (this.lastPTS === null) {
      this.lastPTS = this.basePTS;
    }

    // more expressive than alternative: id3Data?.length
    if (id3Data && id3Data.length > 0) {
      id3Track.samples.push({
        pts: this.lastPTS,
        dts: this.lastPTS,
        data: id3Data,
        type: _types_demuxer__WEBPACK_IMPORTED_MODULE_2__.MetadataSchema.audioId3,
        duration: Number.POSITIVE_INFINITY
      });
    }
    while (offset < length) {
      if (this.canParse(data, offset)) {
        var frame = this.appendFrame(track, data, offset);
        if (frame) {
          this.frameIndex++;
          this.lastPTS = frame.sample.pts;
          offset += frame.length;
          lastDataIndex = offset;
        } else {
          offset = length;
        }
      } else if (_demux_id3__WEBPACK_IMPORTED_MODULE_1__.canParse(data, offset)) {
        // after a ID3.canParse, a call to ID3.getID3Data *should* always returns some data
        id3Data = _demux_id3__WEBPACK_IMPORTED_MODULE_1__.getID3Data(data, offset);
        id3Track.samples.push({
          pts: this.lastPTS,
          dts: this.lastPTS,
          data: id3Data,
          type: _types_demuxer__WEBPACK_IMPORTED_MODULE_2__.MetadataSchema.audioId3,
          duration: Number.POSITIVE_INFINITY
        });
        offset += id3Data.length;
        lastDataIndex = offset;
      } else {
        offset++;
      }
      if (offset === length && lastDataIndex !== length) {
        var partialData = (0,_utils_typed_array__WEBPACK_IMPORTED_MODULE_5__.sliceUint8)(data, lastDataIndex);
        if (this.cachedData) {
          this.cachedData = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_4__.appendUint8Array)(this.cachedData, partialData);
        } else {
          this.cachedData = partialData;
        }
      }
    }
    return {
      audioTrack: track,
      videoTrack: (0,_dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__.dummyTrack)(),
      id3Track: id3Track,
      textTrack: (0,_dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__.dummyTrack)()
    };
  };
  _proto.demuxSampleAes = function demuxSampleAes(data, keyData, timeOffset) {
    return Promise.reject(new Error("[" + this + "] This demuxer does not support Sample-AES decryption"));
  };
  _proto.flush = function flush(timeOffset) {
    // Parse cache in case of remaining frames.
    var cachedData = this.cachedData;
    if (cachedData) {
      this.cachedData = null;
      this.demux(cachedData, 0);
    }
    return {
      audioTrack: this._audioTrack,
      videoTrack: (0,_dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__.dummyTrack)(),
      id3Track: this._id3Track,
      textTrack: (0,_dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__.dummyTrack)()
    };
  };
  _proto.destroy = function destroy() {};
  return BaseAudioDemuxer;
}();
/**
 * Initialize PTS
 * <p>
 *    use timestamp unless it is undefined, NaN or Infinity
 * </p>
 */
var initPTSFn = function initPTSFn(timestamp, timeOffset, initPTS) {
  if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(timestamp)) {
    return timestamp * 90;
  }
  return timeOffset * 90000 + (initPTS || 0);
};
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (BaseAudioDemuxer);

/***/ }),

/***/ "./src/demux/chunk-cache.ts":
/*!**********************************!*\
  !*** ./src/demux/chunk-cache.ts ***!
  \**********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ ChunkCache)
/* harmony export */ });
var ChunkCache = /*#__PURE__*/function () {
  function ChunkCache() {
    this.chunks = [];
    this.dataLength = 0;
  }
  var _proto = ChunkCache.prototype;
  _proto.push = function push(chunk) {
    this.chunks.push(chunk);
    this.dataLength += chunk.length;
  };
  _proto.flush = function flush() {
    var chunks = this.chunks,
      dataLength = this.dataLength;
    var result;
    if (!chunks.length) {
      return new Uint8Array(0);
    } else if (chunks.length === 1) {
      result = chunks[0];
    } else {
      result = concatUint8Arrays(chunks, dataLength);
    }
    this.reset();
    return result;
  };
  _proto.reset = function reset() {
    this.chunks.length = 0;
    this.dataLength = 0;
  };
  return ChunkCache;
}();

function concatUint8Arrays(chunks, dataLength) {
  var result = new Uint8Array(dataLength);
  var offset = 0;
  for (var i = 0; i < chunks.length; i++) {
    var chunk = chunks[i];
    result.set(chunk, offset);
    offset += chunk.length;
  }
  return result;
}

/***/ }),

/***/ "./src/demux/dummy-demuxed-track.ts":
/*!******************************************!*\
  !*** ./src/demux/dummy-demuxed-track.ts ***!
  \******************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "dummyTrack": () => (/* binding */ dummyTrack)
/* harmony export */ });
function dummyTrack(type, inputTimeScale) {
  if (type === void 0) {
    type = '';
  }
  if (inputTimeScale === void 0) {
    inputTimeScale = 90000;
  }
  return {
    type: type,
    id: -1,
    pid: -1,
    inputTimeScale: inputTimeScale,
    sequenceNumber: -1,
    samples: [],
    dropped: 0
  };
}

/***/ }),

/***/ "./src/demux/exp-golomb.ts":
/*!*********************************!*\
  !*** ./src/demux/exp-golomb.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/**
 * Parser for exponential Golomb codes, a variable-bitwidth number encoding scheme used by h264.
 */


var ExpGolomb = /*#__PURE__*/function () {
  function ExpGolomb(data) {
    this.data = void 0;
    this.bytesAvailable = void 0;
    this.word = void 0;
    this.bitsAvailable = void 0;
    this.data = data;
    // the number of bytes left to examine in this.data
    this.bytesAvailable = data.byteLength;
    // the current word being examined
    this.word = 0; // :uint
    // the number of bits left to examine in the current word
    this.bitsAvailable = 0; // :uint
  }

  // ():void
  var _proto = ExpGolomb.prototype;
  _proto.loadWord = function loadWord() {
    var data = this.data;
    var bytesAvailable = this.bytesAvailable;
    var position = data.byteLength - bytesAvailable;
    var workingBytes = new Uint8Array(4);
    var availableBytes = Math.min(4, bytesAvailable);
    if (availableBytes === 0) {
      throw new Error('no bytes available');
    }
    workingBytes.set(data.subarray(position, position + availableBytes));
    this.word = new DataView(workingBytes.buffer).getUint32(0);
    // track the amount of this.data that has been processed
    this.bitsAvailable = availableBytes * 8;
    this.bytesAvailable -= availableBytes;
  }

  // (count:int):void
  ;
  _proto.skipBits = function skipBits(count) {
    var skipBytes; // :int
    count = Math.min(count, this.bytesAvailable * 8 + this.bitsAvailable);
    if (this.bitsAvailable > count) {
      this.word <<= count;
      this.bitsAvailable -= count;
    } else {
      count -= this.bitsAvailable;
      skipBytes = count >> 3;
      count -= skipBytes << 3;
      this.bytesAvailable -= skipBytes;
      this.loadWord();
      this.word <<= count;
      this.bitsAvailable -= count;
    }
  }

  // (size:int):uint
  ;
  _proto.readBits = function readBits(size) {
    var bits = Math.min(this.bitsAvailable, size); // :uint
    var valu = this.word >>> 32 - bits; // :uint
    if (size > 32) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_0__.logger.error('Cannot read more than 32 bits at a time');
    }
    this.bitsAvailable -= bits;
    if (this.bitsAvailable > 0) {
      this.word <<= bits;
    } else if (this.bytesAvailable > 0) {
      this.loadWord();
    } else {
      throw new Error('no bits available');
    }
    bits = size - bits;
    if (bits > 0 && this.bitsAvailable) {
      return valu << bits | this.readBits(bits);
    } else {
      return valu;
    }
  }

  // ():uint
  ;
  _proto.skipLZ = function skipLZ() {
    var leadingZeroCount; // :uint
    for (leadingZeroCount = 0; leadingZeroCount < this.bitsAvailable; ++leadingZeroCount) {
      if ((this.word & 0x80000000 >>> leadingZeroCount) !== 0) {
        // the first bit of working word is 1
        this.word <<= leadingZeroCount;
        this.bitsAvailable -= leadingZeroCount;
        return leadingZeroCount;
      }
    }
    // we exhausted word and still have not found a 1
    this.loadWord();
    return leadingZeroCount + this.skipLZ();
  }

  // ():void
  ;
  _proto.skipUEG = function skipUEG() {
    this.skipBits(1 + this.skipLZ());
  }

  // ():void
  ;
  _proto.skipEG = function skipEG() {
    this.skipBits(1 + this.skipLZ());
  }

  // ():uint
  ;
  _proto.readUEG = function readUEG() {
    var clz = this.skipLZ(); // :uint
    return this.readBits(clz + 1) - 1;
  }

  // ():int
  ;
  _proto.readEG = function readEG() {
    var valu = this.readUEG(); // :int
    if (0x01 & valu) {
      // the number is odd if the low order bit is set
      return 1 + valu >>> 1; // add 1 to make it even, and divide by 2
    } else {
      return -1 * (valu >>> 1); // divide by two then make it negative
    }
  }

  // Some convenience functions
  // :Boolean
  ;
  _proto.readBoolean = function readBoolean() {
    return this.readBits(1) === 1;
  }

  // ():int
  ;
  _proto.readUByte = function readUByte() {
    return this.readBits(8);
  }

  // ():int
  ;
  _proto.readUShort = function readUShort() {
    return this.readBits(16);
  }

  // ():int
  ;
  _proto.readUInt = function readUInt() {
    return this.readBits(32);
  }

  /**
   * Advance the ExpGolomb decoder past a scaling list. The scaling
   * list is optionally transmitted as part of a sequence parameter
   * set and is not relevant to transmuxing.
   * @param count the number of entries in this scaling list
   * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1
   */;
  _proto.skipScalingList = function skipScalingList(count) {
    var lastScale = 8;
    var nextScale = 8;
    var deltaScale;
    for (var j = 0; j < count; j++) {
      if (nextScale !== 0) {
        deltaScale = this.readEG();
        nextScale = (lastScale + deltaScale + 256) % 256;
      }
      lastScale = nextScale === 0 ? lastScale : nextScale;
    }
  }

  /**
   * Read a sequence parameter set and return some interesting video
   * properties. A sequence parameter set is the H264 metadata that
   * describes the properties of upcoming video frames.
   * @param data {Uint8Array} the bytes of a sequence parameter set
   * @return {object} an object with configuration parsed from the
   * sequence parameter set, including the dimensions of the
   * associated video frames.
   */;
  _proto.readSPS = function readSPS() {
    var frameCropLeftOffset = 0;
    var frameCropRightOffset = 0;
    var frameCropTopOffset = 0;
    var frameCropBottomOffset = 0;
    var numRefFramesInPicOrderCntCycle;
    var scalingListCount;
    var i;
    var readUByte = this.readUByte.bind(this);
    var readBits = this.readBits.bind(this);
    var readUEG = this.readUEG.bind(this);
    var readBoolean = this.readBoolean.bind(this);
    var skipBits = this.skipBits.bind(this);
    var skipEG = this.skipEG.bind(this);
    var skipUEG = this.skipUEG.bind(this);
    var skipScalingList = this.skipScalingList.bind(this);
    readUByte();
    var profileIdc = readUByte(); // profile_idc
    readBits(5); // profileCompat constraint_set[0-4]_flag, u(5)
    skipBits(3); // reserved_zero_3bits u(3),
    readUByte(); // level_idc u(8)
    skipUEG(); // seq_parameter_set_id
    // some profiles have more optional data we don't need
    if (profileIdc === 100 || profileIdc === 110 || profileIdc === 122 || profileIdc === 244 || profileIdc === 44 || profileIdc === 83 || profileIdc === 86 || profileIdc === 118 || profileIdc === 128) {
      var chromaFormatIdc = readUEG();
      if (chromaFormatIdc === 3) {
        skipBits(1);
      } // separate_colour_plane_flag

      skipUEG(); // bit_depth_luma_minus8
      skipUEG(); // bit_depth_chroma_minus8
      skipBits(1); // qpprime_y_zero_transform_bypass_flag
      if (readBoolean()) {
        // seq_scaling_matrix_present_flag
        scalingListCount = chromaFormatIdc !== 3 ? 8 : 12;
        for (i = 0; i < scalingListCount; i++) {
          if (readBoolean()) {
            // seq_scaling_list_present_flag[ i ]
            if (i < 6) {
              skipScalingList(16);
            } else {
              skipScalingList(64);
            }
          }
        }
      }
    }
    skipUEG(); // log2_max_frame_num_minus4
    var picOrderCntType = readUEG();
    if (picOrderCntType === 0) {
      readUEG(); // log2_max_pic_order_cnt_lsb_minus4
    } else if (picOrderCntType === 1) {
      skipBits(1); // delta_pic_order_always_zero_flag
      skipEG(); // offset_for_non_ref_pic
      skipEG(); // offset_for_top_to_bottom_field
      numRefFramesInPicOrderCntCycle = readUEG();
      for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) {
        skipEG();
      } // offset_for_ref_frame[ i ]
    }

    skipUEG(); // max_num_ref_frames
    skipBits(1); // gaps_in_frame_num_value_allowed_flag
    var picWidthInMbsMinus1 = readUEG();
    var picHeightInMapUnitsMinus1 = readUEG();
    var frameMbsOnlyFlag = readBits(1);
    if (frameMbsOnlyFlag === 0) {
      skipBits(1);
    } // mb_adaptive_frame_field_flag

    skipBits(1); // direct_8x8_inference_flag
    if (readBoolean()) {
      // frame_cropping_flag
      frameCropLeftOffset = readUEG();
      frameCropRightOffset = readUEG();
      frameCropTopOffset = readUEG();
      frameCropBottomOffset = readUEG();
    }
    var pixelRatio = [1, 1];
    if (readBoolean()) {
      // vui_parameters_present_flag
      if (readBoolean()) {
        // aspect_ratio_info_present_flag
        var aspectRatioIdc = readUByte();
        switch (aspectRatioIdc) {
          case 1:
            pixelRatio = [1, 1];
            break;
          case 2:
            pixelRatio = [12, 11];
            break;
          case 3:
            pixelRatio = [10, 11];
            break;
          case 4:
            pixelRatio = [16, 11];
            break;
          case 5:
            pixelRatio = [40, 33];
            break;
          case 6:
            pixelRatio = [24, 11];
            break;
          case 7:
            pixelRatio = [20, 11];
            break;
          case 8:
            pixelRatio = [32, 11];
            break;
          case 9:
            pixelRatio = [80, 33];
            break;
          case 10:
            pixelRatio = [18, 11];
            break;
          case 11:
            pixelRatio = [15, 11];
            break;
          case 12:
            pixelRatio = [64, 33];
            break;
          case 13:
            pixelRatio = [160, 99];
            break;
          case 14:
            pixelRatio = [4, 3];
            break;
          case 15:
            pixelRatio = [3, 2];
            break;
          case 16:
            pixelRatio = [2, 1];
            break;
          case 255:
            {
              pixelRatio = [readUByte() << 8 | readUByte(), readUByte() << 8 | readUByte()];
              break;
            }
        }
      }
    }
    return {
      width: Math.ceil((picWidthInMbsMinus1 + 1) * 16 - frameCropLeftOffset * 2 - frameCropRightOffset * 2),
      height: (2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16 - (frameMbsOnlyFlag ? 2 : 4) * (frameCropTopOffset + frameCropBottomOffset),
      pixelRatio: pixelRatio
    };
  };
  _proto.readSliceType = function readSliceType() {
    // skip NALu type
    this.readUByte();
    // discard first_mb_in_slice
    this.readUEG();
    // return slice_type
    return this.readUEG();
  };
  return ExpGolomb;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (ExpGolomb);

/***/ }),

/***/ "./src/demux/id3.ts":
/*!**************************!*\
  !*** ./src/demux/id3.ts ***!
  \**************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "canParse": () => (/* binding */ canParse),
/* harmony export */   "decodeFrame": () => (/* binding */ decodeFrame),
/* harmony export */   "getID3Data": () => (/* binding */ getID3Data),
/* harmony export */   "getID3Frames": () => (/* binding */ getID3Frames),
/* harmony export */   "getTimeStamp": () => (/* binding */ getTimeStamp),
/* harmony export */   "isFooter": () => (/* binding */ isFooter),
/* harmony export */   "isHeader": () => (/* binding */ isHeader),
/* harmony export */   "isTimeStampFrame": () => (/* binding */ isTimeStampFrame),
/* harmony export */   "testables": () => (/* binding */ testables),
/* harmony export */   "utf8ArrayToStr": () => (/* binding */ utf8ArrayToStr)
/* harmony export */ });
// breaking up those two types in order to clarify what is happening in the decoding path.

/**
 * Returns true if an ID3 header can be found at offset in data
 * @param {Uint8Array} data - The data to search in
 * @param {number} offset - The offset at which to start searching
 * @return {boolean} - True if an ID3 header is found
 */
var isHeader = function isHeader(data, offset) {
  /*
   * http://id3.org/id3v2.3.0
   * [0]     = 'I'
   * [1]     = 'D'
   * [2]     = '3'
   * [3,4]   = {Version}
   * [5]     = {Flags}
   * [6-9]   = {ID3 Size}
   *
   * An ID3v2 tag can be detected with the following pattern:
   *  $49 44 33 yy yy xx zz zz zz zz
   * Where yy is less than $FF, xx is the 'flags' byte and zz is less than $80
   */
  if (offset + 10 <= data.length) {
    // look for 'ID3' identifier
    if (data[offset] === 0x49 && data[offset + 1] === 0x44 && data[offset + 2] === 0x33) {
      // check version is within range
      if (data[offset + 3] < 0xff && data[offset + 4] < 0xff) {
        // check size is within range
        if (data[offset + 6] < 0x80 && data[offset + 7] < 0x80 && data[offset + 8] < 0x80 && data[offset + 9] < 0x80) {
          return true;
        }
      }
    }
  }
  return false;
};

/**
 * Returns true if an ID3 footer can be found at offset in data
 * @param {Uint8Array} data - The data to search in
 * @param {number} offset - The offset at which to start searching
 * @return {boolean} - True if an ID3 footer is found
 */
var isFooter = function isFooter(data, offset) {
  /*
   * The footer is a copy of the header, but with a different identifier
   */
  if (offset + 10 <= data.length) {
    // look for '3DI' identifier
    if (data[offset] === 0x33 && data[offset + 1] === 0x44 && data[offset + 2] === 0x49) {
      // check version is within range
      if (data[offset + 3] < 0xff && data[offset + 4] < 0xff) {
        // check size is within range
        if (data[offset + 6] < 0x80 && data[offset + 7] < 0x80 && data[offset + 8] < 0x80 && data[offset + 9] < 0x80) {
          return true;
        }
      }
    }
  }
  return false;
};

/**
 * Returns any adjacent ID3 tags found in data starting at offset, as one block of data
 * @param {Uint8Array} data - The data to search in
 * @param {number} offset - The offset at which to start searching
 * @return {Uint8Array | undefined} - The block of data containing any ID3 tags found
 * or *undefined* if no header is found at the starting offset
 */
var getID3Data = function getID3Data(data, offset) {
  var front = offset;
  var length = 0;
  while (isHeader(data, offset)) {
    // ID3 header is 10 bytes
    length += 10;
    var size = readSize(data, offset + 6);
    length += size;
    if (isFooter(data, offset + 10)) {
      // ID3 footer is 10 bytes
      length += 10;
    }
    offset += length;
  }
  if (length > 0) {
    return data.subarray(front, front + length);
  }
  return undefined;
};
var readSize = function readSize(data, offset) {
  var size = 0;
  size = (data[offset] & 0x7f) << 21;
  size |= (data[offset + 1] & 0x7f) << 14;
  size |= (data[offset + 2] & 0x7f) << 7;
  size |= data[offset + 3] & 0x7f;
  return size;
};
var canParse = function canParse(data, offset) {
  return isHeader(data, offset) && readSize(data, offset + 6) + 10 <= data.length - offset;
};

/**
 * Searches for the Elementary Stream timestamp found in the ID3 data chunk
 * @param {Uint8Array} data - Block of data containing one or more ID3 tags
 * @return {number | undefined} - The timestamp
 */
var getTimeStamp = function getTimeStamp(data) {
  var frames = getID3Frames(data);
  for (var i = 0; i < frames.length; i++) {
    var frame = frames[i];
    if (isTimeStampFrame(frame)) {
      return readTimeStamp(frame);
    }
  }
  return undefined;
};

/**
 * Returns true if the ID3 frame is an Elementary Stream timestamp frame
 * @param {ID3 frame} frame
 */
var isTimeStampFrame = function isTimeStampFrame(frame) {
  return frame && frame.key === 'PRIV' && frame.info === 'com.apple.streaming.transportStreamTimestamp';
};
var getFrameData = function getFrameData(data) {
  /*
  Frame ID       $xx xx xx xx (four characters)
  Size           $xx xx xx xx
  Flags          $xx xx
  */
  var type = String.fromCharCode(data[0], data[1], data[2], data[3]);
  var size = readSize(data, 4);

  // skip frame id, size, and flags
  var offset = 10;
  return {
    type: type,
    size: size,
    data: data.subarray(offset, offset + size)
  };
};

/**
 * Returns an array of ID3 frames found in all the ID3 tags in the id3Data
 * @param {Uint8Array} id3Data - The ID3 data containing one or more ID3 tags
 * @return {ID3.Frame[]} - Array of ID3 frame objects
 */
var getID3Frames = function getID3Frames(id3Data) {
  var offset = 0;
  var frames = [];
  while (isHeader(id3Data, offset)) {
    var size = readSize(id3Data, offset + 6);
    // skip past ID3 header
    offset += 10;
    var end = offset + size;
    // loop through frames in the ID3 tag
    while (offset + 8 < end) {
      var frameData = getFrameData(id3Data.subarray(offset));
      var frame = decodeFrame(frameData);
      if (frame) {
        frames.push(frame);
      }

      // skip frame header and frame data
      offset += frameData.size + 10;
    }
    if (isFooter(id3Data, offset)) {
      offset += 10;
    }
  }
  return frames;
};
var decodeFrame = function decodeFrame(frame) {
  if (frame.type === 'PRIV') {
    return decodePrivFrame(frame);
  } else if (frame.type[0] === 'W') {
    return decodeURLFrame(frame);
  }
  return decodeTextFrame(frame);
};
var decodePrivFrame = function decodePrivFrame(frame) {
  /*
  Format: <text string>\0<binary data>
  */
  if (frame.size < 2) {
    return undefined;
  }
  var owner = utf8ArrayToStr(frame.data, true);
  var privateData = new Uint8Array(frame.data.subarray(owner.length + 1));
  return {
    key: frame.type,
    info: owner,
    data: privateData.buffer
  };
};
var decodeTextFrame = function decodeTextFrame(frame) {
  if (frame.size < 2) {
    return undefined;
  }
  if (frame.type === 'TXXX') {
    /*
    Format:
    [0]   = {Text Encoding}
    [1-?] = {Description}\0{Value}
    */
    var index = 1;
    var description = utf8ArrayToStr(frame.data.subarray(index), true);
    index += description.length + 1;
    var value = utf8ArrayToStr(frame.data.subarray(index));
    return {
      key: frame.type,
      info: description,
      data: value
    };
  }
  /*
  Format:
  [0]   = {Text Encoding}
  [1-?] = {Value}
  */
  var text = utf8ArrayToStr(frame.data.subarray(1));
  return {
    key: frame.type,
    data: text
  };
};
var decodeURLFrame = function decodeURLFrame(frame) {
  if (frame.type === 'WXXX') {
    /*
    Format:
    [0]   = {Text Encoding}
    [1-?] = {Description}\0{URL}
    */
    if (frame.size < 2) {
      return undefined;
    }
    var index = 1;
    var description = utf8ArrayToStr(frame.data.subarray(index), true);
    index += description.length + 1;
    var value = utf8ArrayToStr(frame.data.subarray(index));
    return {
      key: frame.type,
      info: description,
      data: value
    };
  }
  /*
  Format:
  [0-?] = {URL}
  */
  var url = utf8ArrayToStr(frame.data);
  return {
    key: frame.type,
    data: url
  };
};
var readTimeStamp = function readTimeStamp(timeStampFrame) {
  if (timeStampFrame.data.byteLength === 8) {
    var data = new Uint8Array(timeStampFrame.data);
    // timestamp is 33 bit expressed as a big-endian eight-octet number,
    // with the upper 31 bits set to zero.
    var pts33Bit = data[3] & 0x1;
    var timestamp = (data[4] << 23) + (data[5] << 15) + (data[6] << 7) + data[7];
    timestamp /= 45;
    if (pts33Bit) {
      timestamp += 47721858.84;
    } // 2^32 / 90

    return Math.round(timestamp);
  }
  return undefined;
};

// http://stackoverflow.com/questions/8936984/uint8array-to-string-in-javascript/22373197
// http://www.onicos.com/staff/iz/amuse/javascript/expert/utf.txt
/* utf.js - UTF-8 <=> UTF-16 convertion
 *
 * Copyright (C) 1999 Masanao Izumo <iz@onicos.co.jp>
 * Version: 1.0
 * LastModified: Dec 25 1999
 * This library is free.  You can redistribute it and/or modify it.
 */
var utf8ArrayToStr = function utf8ArrayToStr(array, exitOnNull) {
  if (exitOnNull === void 0) {
    exitOnNull = false;
  }
  var decoder = getTextDecoder();
  if (decoder) {
    var decoded = decoder.decode(array);
    if (exitOnNull) {
      // grab up to the first null
      var idx = decoded.indexOf('\0');
      return idx !== -1 ? decoded.substring(0, idx) : decoded;
    }

    // remove any null characters
    return decoded.replace(/\0/g, '');
  }
  var len = array.length;
  var c;
  var char2;
  var char3;
  var out = '';
  var i = 0;
  while (i < len) {
    c = array[i++];
    if (c === 0x00 && exitOnNull) {
      return out;
    } else if (c === 0x00 || c === 0x03) {
      // If the character is 3 (END_OF_TEXT) or 0 (NULL) then skip it
      continue;
    }
    switch (c >> 4) {
      case 0:
      case 1:
      case 2:
      case 3:
      case 4:
      case 5:
      case 6:
      case 7:
        // 0xxxxxxx
        out += String.fromCharCode(c);
        break;
      case 12:
      case 13:
        // 110x xxxx   10xx xxxx
        char2 = array[i++];
        out += String.fromCharCode((c & 0x1f) << 6 | char2 & 0x3f);
        break;
      case 14:
        // 1110 xxxx  10xx xxxx  10xx xxxx
        char2 = array[i++];
        char3 = array[i++];
        out += String.fromCharCode((c & 0x0f) << 12 | (char2 & 0x3f) << 6 | (char3 & 0x3f) << 0);
        break;
      default:
    }
  }
  return out;
};
var testables = {
  decodeTextFrame: decodeTextFrame
};
var decoder;
function getTextDecoder() {
  if (!decoder && typeof self.TextDecoder !== 'undefined') {
    decoder = new self.TextDecoder('utf-8');
  }
  return decoder;
}

/***/ }),

/***/ "./src/demux/mp3demuxer.ts":
/*!*********************************!*\
  !*** ./src/demux/mp3demuxer.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _base_audio_demuxer__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./base-audio-demuxer */ "./src/demux/base-audio-demuxer.ts");
/* harmony import */ var _demux_id3__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../demux/id3 */ "./src/demux/id3.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _mpegaudio__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ./mpegaudio */ "./src/demux/mpegaudio.ts");
function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
/**
 * MP3 demuxer
 */




var MP3Demuxer = /*#__PURE__*/function (_BaseAudioDemuxer) {
  _inheritsLoose(MP3Demuxer, _BaseAudioDemuxer);
  function MP3Demuxer() {
    return _BaseAudioDemuxer.apply(this, arguments) || this;
  }
  var _proto = MP3Demuxer.prototype;
  _proto.resetInitSegment = function resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration) {
    _BaseAudioDemuxer.prototype.resetInitSegment.call(this, initSegment, audioCodec, videoCodec, trackDuration);
    this._audioTrack = {
      container: 'audio/mpeg',
      type: 'audio',
      id: 2,
      pid: -1,
      sequenceNumber: 0,
      segmentCodec: 'mp3',
      samples: [],
      manifestCodec: audioCodec,
      duration: trackDuration,
      inputTimeScale: 90000,
      dropped: 0
    };
  };
  MP3Demuxer.probe = function probe(data) {
    if (!data) {
      return false;
    }

    // check if data contains ID3 timestamp and MPEG sync word
    // Look for MPEG header | 1111 1111 | 111X XYZX | where X can be either 0 or 1 and Y or Z should be 1
    // Layer bits (position 14 and 15) in header should be always different from 0 (Layer I or Layer II or Layer III)
    // More info http://www.mp3-tech.org/programmer/frame_header.html
    var id3Data = _demux_id3__WEBPACK_IMPORTED_MODULE_1__.getID3Data(data, 0) || [];
    var offset = id3Data.length;
    for (var length = data.length; offset < length; offset++) {
      if (_mpegaudio__WEBPACK_IMPORTED_MODULE_3__.probe(data, offset)) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.log('MPEG Audio sync word found !');
        return true;
      }
    }
    return false;
  };
  _proto.canParse = function canParse(data, offset) {
    return _mpegaudio__WEBPACK_IMPORTED_MODULE_3__.canParse(data, offset);
  };
  _proto.appendFrame = function appendFrame(track, data, offset) {
    if (this.basePTS === null) {
      return;
    }
    return _mpegaudio__WEBPACK_IMPORTED_MODULE_3__.appendFrame(track, data, offset, this.basePTS, this.frameIndex);
  };
  return MP3Demuxer;
}(_base_audio_demuxer__WEBPACK_IMPORTED_MODULE_0__["default"]);
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (MP3Demuxer);

/***/ }),

/***/ "./src/demux/mp4demuxer.ts":
/*!*********************************!*\
  !*** ./src/demux/mp4demuxer.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _types_demuxer__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../types/demuxer */ "./src/types/demuxer.ts");
/* harmony import */ var _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/mp4-tools */ "./src/utils/mp4-tools.ts");
/* harmony import */ var _dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ./dummy-demuxed-track */ "./src/demux/dummy-demuxed-track.ts");

/**
 * MP4 demuxer
 */



var emsgSchemePattern = /\/emsg[-/]ID3/i;
var MP4Demuxer = /*#__PURE__*/function () {
  function MP4Demuxer(observer, config) {
    this.remainderData = null;
    this.timeOffset = 0;
    this.config = void 0;
    this.videoTrack = void 0;
    this.audioTrack = void 0;
    this.id3Track = void 0;
    this.txtTrack = void 0;
    this.config = config;
  }
  var _proto = MP4Demuxer.prototype;
  _proto.resetTimeStamp = function resetTimeStamp() {};
  _proto.resetInitSegment = function resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration) {
    var videoTrack = this.videoTrack = (0,_dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__.dummyTrack)('video', 1);
    var audioTrack = this.audioTrack = (0,_dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__.dummyTrack)('audio', 1);
    var captionTrack = this.txtTrack = (0,_dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__.dummyTrack)('text', 1);
    this.id3Track = (0,_dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__.dummyTrack)('id3', 1);
    this.timeOffset = 0;
    if (!initSegment || !initSegment.byteLength) {
      return;
    }
    var initData = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.parseInitSegment)(initSegment);
    if (initData.video) {
      var _initData$video = initData.video,
        id = _initData$video.id,
        timescale = _initData$video.timescale,
        codec = _initData$video.codec;
      videoTrack.id = id;
      videoTrack.timescale = captionTrack.timescale = timescale;
      videoTrack.codec = codec;
    }
    if (initData.audio) {
      var _initData$audio = initData.audio,
        _id = _initData$audio.id,
        _timescale = _initData$audio.timescale,
        _codec = _initData$audio.codec;
      audioTrack.id = _id;
      audioTrack.timescale = _timescale;
      audioTrack.codec = _codec;
    }
    captionTrack.id = _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.RemuxerTrackIdConfig.text;
    videoTrack.sampleDuration = 0;
    videoTrack.duration = audioTrack.duration = trackDuration;
  };
  _proto.resetContiguity = function resetContiguity() {};
  MP4Demuxer.probe = function probe(data) {
    // ensure we find a moof box in the first 16 kB
    data = data.length > 16384 ? data.subarray(0, 16384) : data;
    return (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.findBox)(data, ['moof']).length > 0;
  };
  _proto.demux = function demux(data, timeOffset) {
    this.timeOffset = timeOffset;
    // Load all data into the avc track. The CMAF remuxer will look for the data in the samples object; the rest of the fields do not matter
    var videoSamples = data;
    var videoTrack = this.videoTrack;
    var textTrack = this.txtTrack;
    if (this.config.progressive) {
      // Split the bytestream into two ranges: one encompassing all data up until the start of the last moof, and everything else.
      // This is done to guarantee that we're sending valid data to MSE - when demuxing progressively, we have no guarantee
      // that the fetch loader gives us flush moof+mdat pairs. If we push jagged data to MSE, it will throw an exception.
      if (this.remainderData) {
        videoSamples = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.appendUint8Array)(this.remainderData, data);
      }
      var segmentedData = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.segmentValidRange)(videoSamples);
      this.remainderData = segmentedData.remainder;
      videoTrack.samples = segmentedData.valid || new Uint8Array();
    } else {
      videoTrack.samples = videoSamples;
    }
    var id3Track = this.extractID3Track(videoTrack, timeOffset);
    textTrack.samples = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.parseSamples)(timeOffset, videoTrack);
    return {
      videoTrack: videoTrack,
      audioTrack: this.audioTrack,
      id3Track: id3Track,
      textTrack: this.txtTrack
    };
  };
  _proto.flush = function flush() {
    var timeOffset = this.timeOffset;
    var videoTrack = this.videoTrack;
    var textTrack = this.txtTrack;
    videoTrack.samples = this.remainderData || new Uint8Array();
    this.remainderData = null;
    var id3Track = this.extractID3Track(videoTrack, this.timeOffset);
    textTrack.samples = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.parseSamples)(timeOffset, videoTrack);
    return {
      videoTrack: videoTrack,
      audioTrack: (0,_dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__.dummyTrack)(),
      id3Track: id3Track,
      textTrack: (0,_dummy_demuxed_track__WEBPACK_IMPORTED_MODULE_3__.dummyTrack)()
    };
  };
  _proto.extractID3Track = function extractID3Track(videoTrack, timeOffset) {
    var id3Track = this.id3Track;
    if (videoTrack.samples.length) {
      var emsgs = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.findBox)(videoTrack.samples, ['emsg']);
      if (emsgs) {
        emsgs.forEach(function (data) {
          var emsgInfo = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.parseEmsg)(data);
          if (emsgSchemePattern.test(emsgInfo.schemeIdUri)) {
            var pts = (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(emsgInfo.presentationTime) ? emsgInfo.presentationTime / emsgInfo.timeScale : timeOffset + emsgInfo.presentationTimeDelta / emsgInfo.timeScale;
            var duration = emsgInfo.eventDuration === 0xffffffff ? Number.POSITIVE_INFINITY : emsgInfo.eventDuration / emsgInfo.timeScale;
            // Safari takes anything <= 0.001 seconds and maps it to Infinity
            if (duration <= 0.001) {
              duration = Number.POSITIVE_INFINITY;
            }
            var payload = emsgInfo.payload;
            id3Track.samples.push({
              data: payload,
              len: payload.byteLength,
              dts: pts,
              pts: pts,
              type: _types_demuxer__WEBPACK_IMPORTED_MODULE_1__.MetadataSchema.emsg,
              duration: duration
            });
          }
        });
      }
    }
    return id3Track;
  };
  _proto.demuxSampleAes = function demuxSampleAes(data, keyData, timeOffset) {
    return Promise.reject(new Error('The MP4 demuxer does not support SAMPLE-AES decryption'));
  };
  _proto.destroy = function destroy() {};
  return MP4Demuxer;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (MP4Demuxer);

/***/ }),

/***/ "./src/demux/mpegaudio.ts":
/*!********************************!*\
  !*** ./src/demux/mpegaudio.ts ***!
  \********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "appendFrame": () => (/* binding */ appendFrame),
/* harmony export */   "canParse": () => (/* binding */ canParse),
/* harmony export */   "isHeader": () => (/* binding */ isHeader),
/* harmony export */   "isHeaderPattern": () => (/* binding */ isHeaderPattern),
/* harmony export */   "parseHeader": () => (/* binding */ parseHeader),
/* harmony export */   "probe": () => (/* binding */ probe)
/* harmony export */ });
/**
 *  MPEG parser helper
 */

var chromeVersion = null;
var BitratesMap = [32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160];
var SamplingRateMap = [44100, 48000, 32000, 22050, 24000, 16000, 11025, 12000, 8000];
var SamplesCoefficients = [
// MPEG 2.5
[0,
// Reserved
72,
// Layer3
144,
// Layer2
12 // Layer1
],
// Reserved
[0,
// Reserved
0,
// Layer3
0,
// Layer2
0 // Layer1
],
// MPEG 2
[0,
// Reserved
72,
// Layer3
144,
// Layer2
12 // Layer1
],
// MPEG 1
[0,
// Reserved
144,
// Layer3
144,
// Layer2
12 // Layer1
]];

var BytesInSlot = [0,
// Reserved
1,
// Layer3
1,
// Layer2
4 // Layer1
];

function appendFrame(track, data, offset, pts, frameIndex) {
  // Using http://www.datavoyage.com/mpgscript/mpeghdr.htm as a reference
  if (offset + 24 > data.length) {
    return;
  }
  var header = parseHeader(data, offset);
  if (header && offset + header.frameLength <= data.length) {
    var frameDuration = header.samplesPerFrame * 90000 / header.sampleRate;
    var stamp = pts + frameIndex * frameDuration;
    var sample = {
      unit: data.subarray(offset, offset + header.frameLength),
      pts: stamp,
      dts: stamp
    };
    track.config = [];
    track.channelCount = header.channelCount;
    track.samplerate = header.sampleRate;
    track.samples.push(sample);
    return {
      sample: sample,
      length: header.frameLength,
      missing: 0
    };
  }
}
function parseHeader(data, offset) {
  var mpegVersion = data[offset + 1] >> 3 & 3;
  var mpegLayer = data[offset + 1] >> 1 & 3;
  var bitRateIndex = data[offset + 2] >> 4 & 15;
  var sampleRateIndex = data[offset + 2] >> 2 & 3;
  if (mpegVersion !== 1 && bitRateIndex !== 0 && bitRateIndex !== 15 && sampleRateIndex !== 3) {
    var paddingBit = data[offset + 2] >> 1 & 1;
    var channelMode = data[offset + 3] >> 6;
    var columnInBitrates = mpegVersion === 3 ? 3 - mpegLayer : mpegLayer === 3 ? 3 : 4;
    var bitRate = BitratesMap[columnInBitrates * 14 + bitRateIndex - 1] * 1000;
    var columnInSampleRates = mpegVersion === 3 ? 0 : mpegVersion === 2 ? 1 : 2;
    var sampleRate = SamplingRateMap[columnInSampleRates * 3 + sampleRateIndex];
    var channelCount = channelMode === 3 ? 1 : 2; // If bits of channel mode are `11` then it is a single channel (Mono)
    var sampleCoefficient = SamplesCoefficients[mpegVersion][mpegLayer];
    var bytesInSlot = BytesInSlot[mpegLayer];
    var samplesPerFrame = sampleCoefficient * 8 * bytesInSlot;
    var frameLength = Math.floor(sampleCoefficient * bitRate / sampleRate + paddingBit) * bytesInSlot;
    if (chromeVersion === null) {
      var userAgent = navigator.userAgent || '';
      var result = userAgent.match(/Chrome\/(\d+)/i);
      chromeVersion = result ? parseInt(result[1]) : 0;
    }
    var needChromeFix = !!chromeVersion && chromeVersion <= 87;
    if (needChromeFix && mpegLayer === 2 && bitRate >= 224000 && channelMode === 0) {
      // Work around bug in Chromium by setting channelMode to dual-channel (01) instead of stereo (00)
      data[offset + 3] = data[offset + 3] | 0x80;
    }
    return {
      sampleRate: sampleRate,
      channelCount: channelCount,
      frameLength: frameLength,
      samplesPerFrame: samplesPerFrame
    };
  }
}
function isHeaderPattern(data, offset) {
  return data[offset] === 0xff && (data[offset + 1] & 0xe0) === 0xe0 && (data[offset + 1] & 0x06) !== 0x00;
}
function isHeader(data, offset) {
  // Look for MPEG header | 1111 1111 | 111X XYZX | where X can be either 0 or 1 and Y or Z should be 1
  // Layer bits (position 14 and 15) in header should be always different from 0 (Layer I or Layer II or Layer III)
  // More info http://www.mp3-tech.org/programmer/frame_header.html
  return offset + 1 < data.length && isHeaderPattern(data, offset);
}
function canParse(data, offset) {
  var headerSize = 4;
  return isHeaderPattern(data, offset) && headerSize <= data.length - offset;
}
function probe(data, offset) {
  // same as isHeader but we also check that MPEG frame follows last MPEG frame
  // or end of data is reached
  if (offset + 1 < data.length && isHeaderPattern(data, offset)) {
    // MPEG header Length
    var headerLength = 4;
    // MPEG frame Length
    var header = parseHeader(data, offset);
    var frameLength = headerLength;
    if (header !== null && header !== void 0 && header.frameLength) {
      frameLength = header.frameLength;
    }
    var newOffset = offset + frameLength;
    return newOffset === data.length || isHeader(data, newOffset);
  }
  return false;
}

/***/ }),

/***/ "./src/demux/sample-aes.ts":
/*!*********************************!*\
  !*** ./src/demux/sample-aes.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _crypt_decrypter__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../crypt/decrypter */ "./src/crypt/decrypter.ts");
/* harmony import */ var _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../utils/mp4-tools */ "./src/utils/mp4-tools.ts");
/**
 * SAMPLE-AES decrypter
 */



var SampleAesDecrypter = /*#__PURE__*/function () {
  function SampleAesDecrypter(observer, config, keyData) {
    this.keyData = void 0;
    this.decrypter = void 0;
    this.keyData = keyData;
    this.decrypter = new _crypt_decrypter__WEBPACK_IMPORTED_MODULE_0__["default"](config, {
      removePKCS7Padding: false
    });
  }
  var _proto = SampleAesDecrypter.prototype;
  _proto.decryptBuffer = function decryptBuffer(encryptedData) {
    return this.decrypter.decrypt(encryptedData, this.keyData.key.buffer, this.keyData.iv.buffer);
  }

  // AAC - encrypt all full 16 bytes blocks starting from offset 16
  ;
  _proto.decryptAacSample = function decryptAacSample(samples, sampleIndex, callback) {
    var _this = this;
    var curUnit = samples[sampleIndex].unit;
    if (curUnit.length <= 16) {
      // No encrypted portion in this sample (first 16 bytes is not
      // encrypted, see https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/HLS_Sample_Encryption/Encryption/Encryption.html),
      return;
    }
    var encryptedData = curUnit.subarray(16, curUnit.length - curUnit.length % 16);
    var encryptedBuffer = encryptedData.buffer.slice(encryptedData.byteOffset, encryptedData.byteOffset + encryptedData.length);
    this.decryptBuffer(encryptedBuffer).then(function (decryptedBuffer) {
      var decryptedData = new Uint8Array(decryptedBuffer);
      curUnit.set(decryptedData, 16);
      if (!_this.decrypter.isSync()) {
        _this.decryptAacSamples(samples, sampleIndex + 1, callback);
      }
    });
  };
  _proto.decryptAacSamples = function decryptAacSamples(samples, sampleIndex, callback) {
    for (;; sampleIndex++) {
      if (sampleIndex >= samples.length) {
        callback();
        return;
      }
      if (samples[sampleIndex].unit.length < 32) {
        continue;
      }
      this.decryptAacSample(samples, sampleIndex, callback);
      if (!this.decrypter.isSync()) {
        return;
      }
    }
  }

  // AVC - encrypt one 16 bytes block out of ten, starting from offset 32
  ;
  _proto.getAvcEncryptedData = function getAvcEncryptedData(decodedData) {
    var encryptedDataLen = Math.floor((decodedData.length - 48) / 160) * 16 + 16;
    var encryptedData = new Int8Array(encryptedDataLen);
    var outputPos = 0;
    for (var inputPos = 32; inputPos < decodedData.length - 16; inputPos += 160, outputPos += 16) {
      encryptedData.set(decodedData.subarray(inputPos, inputPos + 16), outputPos);
    }
    return encryptedData;
  };
  _proto.getAvcDecryptedUnit = function getAvcDecryptedUnit(decodedData, decryptedData) {
    var uint8DecryptedData = new Uint8Array(decryptedData);
    var inputPos = 0;
    for (var outputPos = 32; outputPos < decodedData.length - 16; outputPos += 160, inputPos += 16) {
      decodedData.set(uint8DecryptedData.subarray(inputPos, inputPos + 16), outputPos);
    }
    return decodedData;
  };
  _proto.decryptAvcSample = function decryptAvcSample(samples, sampleIndex, unitIndex, callback, curUnit) {
    var _this2 = this;
    var decodedData = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_1__.discardEPB)(curUnit.data);
    var encryptedData = this.getAvcEncryptedData(decodedData);
    this.decryptBuffer(encryptedData.buffer).then(function (decryptedBuffer) {
      curUnit.data = _this2.getAvcDecryptedUnit(decodedData, decryptedBuffer);
      if (!_this2.decrypter.isSync()) {
        _this2.decryptAvcSamples(samples, sampleIndex, unitIndex + 1, callback);
      }
    });
  };
  _proto.decryptAvcSamples = function decryptAvcSamples(samples, sampleIndex, unitIndex, callback) {
    if (samples instanceof Uint8Array) {
      throw new Error('Cannot decrypt samples of type Uint8Array');
    }
    for (;; sampleIndex++, unitIndex = 0) {
      if (sampleIndex >= samples.length) {
        callback();
        return;
      }
      var curUnits = samples[sampleIndex].units;
      for (;; unitIndex++) {
        if (unitIndex >= curUnits.length) {
          break;
        }
        var curUnit = curUnits[unitIndex];
        if (curUnit.data.length <= 48 || curUnit.type !== 1 && curUnit.type !== 5) {
          continue;
        }
        this.decryptAvcSample(samples, sampleIndex, unitIndex, callback, curUnit);
        if (!this.decrypter.isSync()) {
          return;
        }
      }
    }
  };
  return SampleAesDecrypter;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (SampleAesDecrypter);

/***/ }),

/***/ "./src/demux/transmuxer-interface.ts":
/*!*******************************************!*\
  !*** ./src/demux/transmuxer-interface.ts ***!
  \*******************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ TransmuxerInterface)
/* harmony export */ });
/* harmony import */ var _webworkify_webpack__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./webworkify-webpack */ "./src/demux/webworkify-webpack.js");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _demux_transmuxer__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../demux/transmuxer */ "./src/demux/transmuxer.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _utils_mediasource_helper__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../utils/mediasource-helper */ "./src/utils/mediasource-helper.ts");
/* harmony import */ var eventemitter3__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! eventemitter3 */ "./node_modules/eventemitter3/index.js");
/* harmony import */ var eventemitter3__WEBPACK_IMPORTED_MODULE_6___default = /*#__PURE__*/__webpack_require__.n(eventemitter3__WEBPACK_IMPORTED_MODULE_6__);







var MediaSource = (0,_utils_mediasource_helper__WEBPACK_IMPORTED_MODULE_5__.getMediaSource)() || {
  isTypeSupported: function isTypeSupported() {
    return false;
  }
};
var TransmuxerInterface = /*#__PURE__*/function () {
  function TransmuxerInterface(hls, id, onTransmuxComplete, onFlush) {
    var _this = this;
    this.hls = void 0;
    this.id = void 0;
    this.observer = void 0;
    this.frag = null;
    this.part = null;
    this.useWorker = void 0;
    this.worker = void 0;
    this.onwmsg = void 0;
    this.transmuxer = null;
    this.onTransmuxComplete = void 0;
    this.onFlush = void 0;
    var config = hls.config;
    this.hls = hls;
    this.id = id;
    this.useWorker = !!config.enableWorker;
    this.onTransmuxComplete = onTransmuxComplete;
    this.onFlush = onFlush;
    var forwardMessage = function forwardMessage(ev, data) {
      data = data || {};
      data.frag = _this.frag;
      data.id = _this.id;
      _this.hls.trigger(ev, data);
    };

    // forward events to main thread
    this.observer = new eventemitter3__WEBPACK_IMPORTED_MODULE_6__.EventEmitter();
    this.observer.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_DECRYPTED, forwardMessage);
    this.observer.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, forwardMessage);
    var typeSupported = {
      mp4: MediaSource.isTypeSupported('video/mp4'),
      mpeg: MediaSource.isTypeSupported('audio/mpeg'),
      mp3: MediaSource.isTypeSupported('audio/mp4; codecs="mp3"')
    };
    // navigator.vendor is not always available in Web Worker
    // refer to https://developer.mozilla.org/en-US/docs/Web/API/WorkerGlobalScope/navigator
    var vendor = navigator.vendor;
    if (this.useWorker && typeof Worker !== 'undefined') {
      _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.log('demuxing in webworker');
      var worker;
      try {
        worker = this.worker = (0,_webworkify_webpack__WEBPACK_IMPORTED_MODULE_0__["default"])(/*require.resolve*/(/*! ../demux/transmuxer-worker.ts */ "./src/demux/transmuxer-worker.ts"));
        this.onwmsg = this.onWorkerMessage.bind(this);
        worker.addEventListener('message', this.onwmsg);
        worker.onerror = function (event) {
          _this.useWorker = false;
          _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn('Exception in webworker, fallback to inline');
          _this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, {
            type: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorTypes.OTHER_ERROR,
            details: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorDetails.INTERNAL_EXCEPTION,
            fatal: false,
            event: 'demuxerWorker',
            error: new Error(event.message + "  (" + event.filename + ":" + event.lineno + ")")
          });
        };
        worker.postMessage({
          cmd: 'init',
          typeSupported: typeSupported,
          vendor: vendor,
          id: id,
          config: JSON.stringify(config)
        });
      } catch (err) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn('Error in worker:', err);
        _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.error('Error while initializing DemuxerWorker, fallback to inline');
        if (worker) {
          // revoke the Object URL that was used to create transmuxer worker, so as not to leak it
          self.URL.revokeObjectURL(worker.objectURL);
        }
        this.transmuxer = new _demux_transmuxer__WEBPACK_IMPORTED_MODULE_2__["default"](this.observer, typeSupported, config, vendor, id);
        this.worker = null;
      }
    } else {
      this.transmuxer = new _demux_transmuxer__WEBPACK_IMPORTED_MODULE_2__["default"](this.observer, typeSupported, config, vendor, id);
    }
  }
  var _proto = TransmuxerInterface.prototype;
  _proto.destroy = function destroy() {
    var w = this.worker;
    if (w) {
      w.removeEventListener('message', this.onwmsg);
      w.terminate();
      this.worker = null;
      this.onwmsg = undefined;
    } else {
      var transmuxer = this.transmuxer;
      if (transmuxer) {
        transmuxer.destroy();
        this.transmuxer = null;
      }
    }
    var observer = this.observer;
    if (observer) {
      observer.removeAllListeners();
    }
    this.frag = null;
    // @ts-ignore
    this.observer = null;
    // @ts-ignore
    this.hls = null;
  };
  _proto.push = function push(data, initSegmentData, audioCodec, videoCodec, frag, part, duration, accurateTimeOffset, chunkMeta, defaultInitPTS) {
    var _frag$initSegment,
      _lastFrag$initSegment,
      _this2 = this;
    chunkMeta.transmuxing.start = self.performance.now();
    var transmuxer = this.transmuxer,
      worker = this.worker;
    var timeOffset = part ? part.start : frag.start;
    // TODO: push "clear-lead" decrypt data for unencrypted fragments in streams with encrypted ones
    var decryptdata = frag.decryptdata;
    var lastFrag = this.frag;
    var discontinuity = !(lastFrag && frag.cc === lastFrag.cc);
    var trackSwitch = !(lastFrag && chunkMeta.level === lastFrag.level);
    var snDiff = lastFrag ? chunkMeta.sn - lastFrag.sn : -1;
    var partDiff = this.part ? chunkMeta.part - this.part.index : -1;
    var progressive = snDiff === 0 && chunkMeta.id > 1 && chunkMeta.id === (lastFrag === null || lastFrag === void 0 ? void 0 : lastFrag.stats.chunkCount);
    var contiguous = !trackSwitch && (snDiff === 1 || snDiff === 0 && (partDiff === 1 || progressive && partDiff <= 0));
    var now = self.performance.now();
    if (trackSwitch || snDiff || frag.stats.parsing.start === 0) {
      frag.stats.parsing.start = now;
    }
    if (part && (partDiff || !contiguous)) {
      part.stats.parsing.start = now;
    }
    var initSegmentChange = !(lastFrag && ((_frag$initSegment = frag.initSegment) === null || _frag$initSegment === void 0 ? void 0 : _frag$initSegment.url) === ((_lastFrag$initSegment = lastFrag.initSegment) === null || _lastFrag$initSegment === void 0 ? void 0 : _lastFrag$initSegment.url));
    var state = new _demux_transmuxer__WEBPACK_IMPORTED_MODULE_2__.TransmuxState(discontinuity, contiguous, accurateTimeOffset, trackSwitch, timeOffset, initSegmentChange);
    if (!contiguous || discontinuity || initSegmentChange) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.log("[transmuxer-interface, " + frag.type + "]: Starting new transmux session for sn: " + chunkMeta.sn + " p: " + chunkMeta.part + " level: " + chunkMeta.level + " id: " + chunkMeta.id + "\n        discontinuity: " + discontinuity + "\n        trackSwitch: " + trackSwitch + "\n        contiguous: " + contiguous + "\n        accurateTimeOffset: " + accurateTimeOffset + "\n        timeOffset: " + timeOffset + "\n        initSegmentChange: " + initSegmentChange);
      var config = new _demux_transmuxer__WEBPACK_IMPORTED_MODULE_2__.TransmuxConfig(audioCodec, videoCodec, initSegmentData, duration, defaultInitPTS);
      this.configureTransmuxer(config);
    }
    this.frag = frag;
    this.part = part;

    // Frags with sn of 'initSegment' are not transmuxed
    if (worker) {
      // post fragment payload as transferable objects for ArrayBuffer (no copy)
      worker.postMessage({
        cmd: 'demux',
        data: data,
        decryptdata: decryptdata,
        chunkMeta: chunkMeta,
        state: state
      }, data instanceof ArrayBuffer ? [data] : []);
    } else if (transmuxer) {
      var _transmuxResult = transmuxer.push(data, decryptdata, chunkMeta, state);
      if ((0,_demux_transmuxer__WEBPACK_IMPORTED_MODULE_2__.isPromise)(_transmuxResult)) {
        transmuxer.async = true;
        _transmuxResult.then(function (data) {
          _this2.handleTransmuxComplete(data);
        }).catch(function (error) {
          _this2.transmuxerError(error, chunkMeta, 'transmuxer-interface push error');
        });
      } else {
        transmuxer.async = false;
        this.handleTransmuxComplete(_transmuxResult);
      }
    }
  };
  _proto.flush = function flush(chunkMeta) {
    var _this3 = this;
    chunkMeta.transmuxing.start = self.performance.now();
    var transmuxer = this.transmuxer,
      worker = this.worker;
    if (worker) {
      1;
      worker.postMessage({
        cmd: 'flush',
        chunkMeta: chunkMeta
      });
    } else if (transmuxer) {
      var _transmuxResult2 = transmuxer.flush(chunkMeta);
      var asyncFlush = (0,_demux_transmuxer__WEBPACK_IMPORTED_MODULE_2__.isPromise)(_transmuxResult2);
      if (asyncFlush || transmuxer.async) {
        if (!(0,_demux_transmuxer__WEBPACK_IMPORTED_MODULE_2__.isPromise)(_transmuxResult2)) {
          _transmuxResult2 = Promise.resolve(_transmuxResult2);
        }
        _transmuxResult2.then(function (data) {
          _this3.handleFlushResult(data, chunkMeta);
        }).catch(function (error) {
          _this3.transmuxerError(error, chunkMeta, 'transmuxer-interface flush error');
        });
      } else {
        this.handleFlushResult(_transmuxResult2, chunkMeta);
      }
    }
  };
  _proto.transmuxerError = function transmuxerError(error, chunkMeta, reason) {
    if (!this.hls) {
      return;
    }
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, {
      type: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorTypes.MEDIA_ERROR,
      details: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorDetails.FRAG_PARSING_ERROR,
      chunkMeta: chunkMeta,
      fatal: false,
      error: error,
      err: error,
      reason: reason
    });
  };
  _proto.handleFlushResult = function handleFlushResult(results, chunkMeta) {
    var _this4 = this;
    results.forEach(function (result) {
      _this4.handleTransmuxComplete(result);
    });
    this.onFlush(chunkMeta);
  };
  _proto.onWorkerMessage = function onWorkerMessage(ev) {
    var data = ev.data;
    var hls = this.hls;
    switch (data.event) {
      case 'init':
        {
          // revoke the Object URL that was used to create transmuxer worker, so as not to leak it
          self.URL.revokeObjectURL(this.worker.objectURL);
          break;
        }
      case 'transmuxComplete':
        {
          this.handleTransmuxComplete(data.data);
          break;
        }
      case 'flush':
        {
          this.onFlush(data.data);
          break;
        }

      // pass logs from the worker thread to the main logger
      case 'workerLog':
        if (_utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger[data.data.logType]) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger[data.data.logType](data.data.message);
        }
        break;
      default:
        {
          data.data = data.data || {};
          data.data.frag = this.frag;
          data.data.id = this.id;
          hls.trigger(data.event, data.data);
          break;
        }
    }
  };
  _proto.configureTransmuxer = function configureTransmuxer(config) {
    var worker = this.worker,
      transmuxer = this.transmuxer;
    if (worker) {
      worker.postMessage({
        cmd: 'configure',
        config: config
      });
    } else if (transmuxer) {
      transmuxer.configure(config);
    }
  };
  _proto.handleTransmuxComplete = function handleTransmuxComplete(result) {
    result.chunkMeta.transmuxing.end = self.performance.now();
    this.onTransmuxComplete(result);
  };
  return TransmuxerInterface;
}();


/***/ }),

/***/ "./src/demux/transmuxer-worker.ts":
/*!****************************************!*\
  !*** ./src/demux/transmuxer-worker.ts ***!
  \****************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ TransmuxerWorker)
/* harmony export */ });
/* harmony import */ var _demux_transmuxer__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../demux/transmuxer */ "./src/demux/transmuxer.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var eventemitter3__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! eventemitter3 */ "./node_modules/eventemitter3/index.js");
/* harmony import */ var eventemitter3__WEBPACK_IMPORTED_MODULE_3___default = /*#__PURE__*/__webpack_require__.n(eventemitter3__WEBPACK_IMPORTED_MODULE_3__);
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");





function TransmuxerWorker(self) {
  var observer = new eventemitter3__WEBPACK_IMPORTED_MODULE_3__.EventEmitter();
  var forwardMessage = function forwardMessage(ev, data) {
    self.postMessage({
      event: ev,
      data: data
    });
  };

  // forward events to main thread
  observer.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.FRAG_DECRYPTED, forwardMessage);
  observer.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, forwardMessage);

  // forward logger events to main thread
  var forwardWorkerLogs = function forwardWorkerLogs() {
    var _loop = function _loop(logFn) {
      var func = function func(message) {
        forwardMessage('workerLog', {
          logType: logFn,
          message: message
        });
      };
      _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger[logFn] = func;
    };
    for (var logFn in _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger) {
      _loop(logFn);
    }
  };
  self.addEventListener('message', function (ev) {
    var data = ev.data;
    switch (data.cmd) {
      case 'init':
        {
          var config = JSON.parse(data.config);
          self.transmuxer = new _demux_transmuxer__WEBPACK_IMPORTED_MODULE_0__["default"](observer, data.typeSupported, config, data.vendor, data.id);
          (0,_utils_logger__WEBPACK_IMPORTED_MODULE_2__.enableLogs)(config.debug, data.id);
          forwardWorkerLogs();
          forwardMessage('init', null);
          break;
        }
      case 'configure':
        {
          self.transmuxer.configure(data.config);
          break;
        }
      case 'demux':
        {
          var transmuxResult = self.transmuxer.push(data.data, data.decryptdata, data.chunkMeta, data.state);
          if ((0,_demux_transmuxer__WEBPACK_IMPORTED_MODULE_0__.isPromise)(transmuxResult)) {
            self.transmuxer.async = true;
            transmuxResult.then(function (data) {
              emitTransmuxComplete(self, data);
            }).catch(function (error) {
              forwardMessage(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, {
                type: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorTypes.MEDIA_ERROR,
                details: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorDetails.FRAG_PARSING_ERROR,
                chunkMeta: data.chunkMeta,
                fatal: false,
                error: error,
                err: error,
                reason: "transmuxer-worker push error"
              });
            });
          } else {
            self.transmuxer.async = false;
            emitTransmuxComplete(self, transmuxResult);
          }
          break;
        }
      case 'flush':
        {
          var id = data.chunkMeta;
          var _transmuxResult = self.transmuxer.flush(id);
          var asyncFlush = (0,_demux_transmuxer__WEBPACK_IMPORTED_MODULE_0__.isPromise)(_transmuxResult);
          if (asyncFlush || self.transmuxer.async) {
            if (!(0,_demux_transmuxer__WEBPACK_IMPORTED_MODULE_0__.isPromise)(_transmuxResult)) {
              _transmuxResult = Promise.resolve(_transmuxResult);
            }
            _transmuxResult.then(function (results) {
              handleFlushResult(self, results, id);
            }).catch(function (error) {
              forwardMessage(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, {
                type: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorTypes.MEDIA_ERROR,
                details: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorDetails.FRAG_PARSING_ERROR,
                chunkMeta: data.chunkMeta,
                fatal: false,
                error: error,
                err: error,
                reason: "transmuxer-worker flush error"
              });
            });
          } else {
            handleFlushResult(self, _transmuxResult, id);
          }
          break;
        }
      default:
        break;
    }
  });
}
function emitTransmuxComplete(self, transmuxResult) {
  if (isEmptyResult(transmuxResult.remuxResult)) {
    return false;
  }
  var transferable = [];
  var _transmuxResult$remux = transmuxResult.remuxResult,
    audio = _transmuxResult$remux.audio,
    video = _transmuxResult$remux.video;
  if (audio) {
    addToTransferable(transferable, audio);
  }
  if (video) {
    addToTransferable(transferable, video);
  }
  self.postMessage({
    event: 'transmuxComplete',
    data: transmuxResult
  }, transferable);
  return true;
}

// Converts data to a transferable object https://developers.google.com/web/updates/2011/12/Transferable-Objects-Lightning-Fast)
// in order to minimize message passing overhead
function addToTransferable(transferable, track) {
  if (track.data1) {
    transferable.push(track.data1.buffer);
  }
  if (track.data2) {
    transferable.push(track.data2.buffer);
  }
}
function handleFlushResult(self, results, chunkMeta) {
  var parsed = results.reduce(function (parsed, result) {
    return emitTransmuxComplete(self, result) || parsed;
  }, false);
  if (!parsed) {
    // Emit at least one "transmuxComplete" message even if media is not found to update stream-controller state to PARSING
    self.postMessage({
      event: 'transmuxComplete',
      data: results[0]
    });
  }
  self.postMessage({
    event: 'flush',
    data: chunkMeta
  });
}
function isEmptyResult(remuxResult) {
  return !remuxResult.audio && !remuxResult.video && !remuxResult.text && !remuxResult.id3 && !remuxResult.initSegment;
}

/***/ }),

/***/ "./src/demux/transmuxer.ts":
/*!*********************************!*\
  !*** ./src/demux/transmuxer.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "TransmuxConfig": () => (/* binding */ TransmuxConfig),
/* harmony export */   "TransmuxState": () => (/* binding */ TransmuxState),
/* harmony export */   "default": () => (/* binding */ Transmuxer),
/* harmony export */   "isPromise": () => (/* binding */ isPromise)
/* harmony export */ });
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _crypt_decrypter__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../crypt/decrypter */ "./src/crypt/decrypter.ts");
/* harmony import */ var _demux_aacdemuxer__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../demux/aacdemuxer */ "./src/demux/aacdemuxer.ts");
/* harmony import */ var _demux_mp4demuxer__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../demux/mp4demuxer */ "./src/demux/mp4demuxer.ts");
/* harmony import */ var _demux_tsdemuxer__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../demux/tsdemuxer */ "./src/demux/tsdemuxer.ts");
/* harmony import */ var _demux_mp3demuxer__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../demux/mp3demuxer */ "./src/demux/mp3demuxer.ts");
/* harmony import */ var _remux_mp4_remuxer__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ../remux/mp4-remuxer */ "./src/remux/mp4-remuxer.ts");
/* harmony import */ var _remux_passthrough_remuxer__WEBPACK_IMPORTED_MODULE_8__ = __webpack_require__(/*! ../remux/passthrough-remuxer */ "./src/remux/passthrough-remuxer.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_9__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");










var now;
// performance.now() not available on WebWorker, at least on Safari Desktop
try {
  now = self.performance.now.bind(self.performance);
} catch (err) {
  _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.debug('Unable to use Performance API on this environment');
  now = self.Date.now;
}
var muxConfig = [{
  demux: _demux_mp4demuxer__WEBPACK_IMPORTED_MODULE_4__["default"],
  remux: _remux_passthrough_remuxer__WEBPACK_IMPORTED_MODULE_8__["default"]
}, {
  demux: _demux_tsdemuxer__WEBPACK_IMPORTED_MODULE_5__["default"],
  remux: _remux_mp4_remuxer__WEBPACK_IMPORTED_MODULE_7__["default"]
}, {
  demux: _demux_aacdemuxer__WEBPACK_IMPORTED_MODULE_3__["default"],
  remux: _remux_mp4_remuxer__WEBPACK_IMPORTED_MODULE_7__["default"]
}, {
  demux: _demux_mp3demuxer__WEBPACK_IMPORTED_MODULE_6__["default"],
  remux: _remux_mp4_remuxer__WEBPACK_IMPORTED_MODULE_7__["default"]
}];
var Transmuxer = /*#__PURE__*/function () {
  function Transmuxer(observer, typeSupported, config, vendor, id) {
    this.async = false;
    this.observer = void 0;
    this.typeSupported = void 0;
    this.config = void 0;
    this.vendor = void 0;
    this.id = void 0;
    this.demuxer = void 0;
    this.remuxer = void 0;
    this.decrypter = void 0;
    this.probe = void 0;
    this.decryptionPromise = null;
    this.transmuxConfig = void 0;
    this.currentTransmuxState = void 0;
    this.observer = observer;
    this.typeSupported = typeSupported;
    this.config = config;
    this.vendor = vendor;
    this.id = id;
  }
  var _proto = Transmuxer.prototype;
  _proto.configure = function configure(transmuxConfig) {
    this.transmuxConfig = transmuxConfig;
    if (this.decrypter) {
      this.decrypter.reset();
    }
  };
  _proto.push = function push(data, decryptdata, chunkMeta, state) {
    var _this = this;
    var stats = chunkMeta.transmuxing;
    stats.executeStart = now();
    var uintData = new Uint8Array(data);
    var currentTransmuxState = this.currentTransmuxState,
      transmuxConfig = this.transmuxConfig;
    if (state) {
      this.currentTransmuxState = state;
    }
    var _ref = state || currentTransmuxState,
      contiguous = _ref.contiguous,
      discontinuity = _ref.discontinuity,
      trackSwitch = _ref.trackSwitch,
      accurateTimeOffset = _ref.accurateTimeOffset,
      timeOffset = _ref.timeOffset,
      initSegmentChange = _ref.initSegmentChange;
    var audioCodec = transmuxConfig.audioCodec,
      videoCodec = transmuxConfig.videoCodec,
      defaultInitPts = transmuxConfig.defaultInitPts,
      duration = transmuxConfig.duration,
      initSegmentData = transmuxConfig.initSegmentData;
    var keyData = getEncryptionType(uintData, decryptdata);
    if (keyData && keyData.method === 'AES-128') {
      var decrypter = this.getDecrypter();
      // Software decryption is synchronous; webCrypto is not
      if (decrypter.isSync()) {
        // Software decryption is progressive. Progressive decryption may not return a result on each call. Any cached
        // data is handled in the flush() call
        var decryptedData = decrypter.softwareDecrypt(uintData, keyData.key.buffer, keyData.iv.buffer);
        // For Low-Latency HLS Parts, decrypt in place, since part parsing is expected on push progress
        var loadingParts = chunkMeta.part > -1;
        if (loadingParts) {
          decryptedData = decrypter.flush();
        }
        if (!decryptedData) {
          stats.executeEnd = now();
          return emptyResult(chunkMeta);
        }
        uintData = new Uint8Array(decryptedData);
      } else {
        this.decryptionPromise = decrypter.webCryptoDecrypt(uintData, keyData.key.buffer, keyData.iv.buffer).then(function (decryptedData) {
          // Calling push here is important; if flush() is called while this is still resolving, this ensures that
          // the decrypted data has been transmuxed
          var result = _this.push(decryptedData, null, chunkMeta);
          _this.decryptionPromise = null;
          return result;
        });
        return this.decryptionPromise;
      }
    }
    var resetMuxers = this.needsProbing(discontinuity, trackSwitch);
    if (resetMuxers) {
      this.configureTransmuxer(uintData);
    }
    if (discontinuity || trackSwitch || initSegmentChange || resetMuxers) {
      this.resetInitSegment(initSegmentData, audioCodec, videoCodec, duration, decryptdata);
    }
    if (discontinuity || initSegmentChange || resetMuxers) {
      this.resetInitialTimestamp(defaultInitPts);
    }
    if (!contiguous) {
      this.resetContiguity();
    }
    var result = this.transmux(uintData, keyData, timeOffset, accurateTimeOffset, chunkMeta);
    var currentState = this.currentTransmuxState;
    currentState.contiguous = true;
    currentState.discontinuity = false;
    currentState.trackSwitch = false;
    stats.executeEnd = now();
    return result;
  }

  // Due to data caching, flush calls can produce more than one TransmuxerResult (hence the Array type)
  ;
  _proto.flush = function flush(chunkMeta) {
    var _this2 = this;
    var stats = chunkMeta.transmuxing;
    stats.executeStart = now();
    var decrypter = this.decrypter,
      currentTransmuxState = this.currentTransmuxState,
      decryptionPromise = this.decryptionPromise;
    if (decryptionPromise) {
      // Upon resolution, the decryption promise calls push() and returns its TransmuxerResult up the stack. Therefore
      // only flushing is required for async decryption
      return decryptionPromise.then(function () {
        return _this2.flush(chunkMeta);
      });
    }
    var transmuxResults = [];
    var timeOffset = currentTransmuxState.timeOffset;
    if (decrypter) {
      // The decrypter may have data cached, which needs to be demuxed. In this case we'll have two TransmuxResults
      // This happens in the case that we receive only 1 push call for a segment (either for non-progressive downloads,
      // or for progressive downloads with small segments)
      var decryptedData = decrypter.flush();
      if (decryptedData) {
        // Push always returns a TransmuxerResult if decryptdata is null
        transmuxResults.push(this.push(decryptedData, null, chunkMeta));
      }
    }
    var demuxer = this.demuxer,
      remuxer = this.remuxer;
    if (!demuxer || !remuxer) {
      // If probing failed, then Hls.js has been given content its not able to handle
      this.observer.emit(_events__WEBPACK_IMPORTED_MODULE_0__.Events.ERROR, _events__WEBPACK_IMPORTED_MODULE_0__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.MEDIA_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.FRAG_PARSING_ERROR,
        fatal: true,
        reason: 'no demux matching with content found'
      });
      stats.executeEnd = now();
      return [emptyResult(chunkMeta)];
    }
    var demuxResultOrPromise = demuxer.flush(timeOffset);
    if (isPromise(demuxResultOrPromise)) {
      // Decrypt final SAMPLE-AES samples
      return demuxResultOrPromise.then(function (demuxResult) {
        _this2.flushRemux(transmuxResults, demuxResult, chunkMeta);
        return transmuxResults;
      });
    }
    this.flushRemux(transmuxResults, demuxResultOrPromise, chunkMeta);
    return transmuxResults;
  };
  _proto.flushRemux = function flushRemux(transmuxResults, demuxResult, chunkMeta) {
    var audioTrack = demuxResult.audioTrack,
      videoTrack = demuxResult.videoTrack,
      id3Track = demuxResult.id3Track,
      textTrack = demuxResult.textTrack;
    var _this$currentTransmux = this.currentTransmuxState,
      accurateTimeOffset = _this$currentTransmux.accurateTimeOffset,
      timeOffset = _this$currentTransmux.timeOffset;
    _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log("[transmuxer.ts]: Flushed fragment " + chunkMeta.sn + (chunkMeta.part > -1 ? ' p: ' + chunkMeta.part : '') + " of level " + chunkMeta.level);
    var remuxResult = this.remuxer.remux(audioTrack, videoTrack, id3Track, textTrack, timeOffset, accurateTimeOffset, true, this.id);
    transmuxResults.push({
      remuxResult: remuxResult,
      chunkMeta: chunkMeta
    });
    chunkMeta.transmuxing.executeEnd = now();
  };
  _proto.resetInitialTimestamp = function resetInitialTimestamp(defaultInitPts) {
    var demuxer = this.demuxer,
      remuxer = this.remuxer;
    if (!demuxer || !remuxer) {
      return;
    }
    demuxer.resetTimeStamp(defaultInitPts);
    remuxer.resetTimeStamp(defaultInitPts);
  };
  _proto.resetContiguity = function resetContiguity() {
    var demuxer = this.demuxer,
      remuxer = this.remuxer;
    if (!demuxer || !remuxer) {
      return;
    }
    demuxer.resetContiguity();
    remuxer.resetNextTimestamp();
  };
  _proto.resetInitSegment = function resetInitSegment(initSegmentData, audioCodec, videoCodec, trackDuration, decryptdata) {
    var demuxer = this.demuxer,
      remuxer = this.remuxer;
    if (!demuxer || !remuxer) {
      return;
    }
    demuxer.resetInitSegment(initSegmentData, audioCodec, videoCodec, trackDuration);
    remuxer.resetInitSegment(initSegmentData, audioCodec, videoCodec, decryptdata);
  };
  _proto.destroy = function destroy() {
    if (this.demuxer) {
      this.demuxer.destroy();
      this.demuxer = undefined;
    }
    if (this.remuxer) {
      this.remuxer.destroy();
      this.remuxer = undefined;
    }
  };
  _proto.transmux = function transmux(data, keyData, timeOffset, accurateTimeOffset, chunkMeta) {
    var result;
    if (keyData && keyData.method === 'SAMPLE-AES') {
      result = this.transmuxSampleAes(data, keyData, timeOffset, accurateTimeOffset, chunkMeta);
    } else {
      result = this.transmuxUnencrypted(data, timeOffset, accurateTimeOffset, chunkMeta);
    }
    return result;
  };
  _proto.transmuxUnencrypted = function transmuxUnencrypted(data, timeOffset, accurateTimeOffset, chunkMeta) {
    var _demux = this.demuxer.demux(data, timeOffset, false, !this.config.progressive),
      audioTrack = _demux.audioTrack,
      videoTrack = _demux.videoTrack,
      id3Track = _demux.id3Track,
      textTrack = _demux.textTrack;
    var remuxResult = this.remuxer.remux(audioTrack, videoTrack, id3Track, textTrack, timeOffset, accurateTimeOffset, false, this.id);
    return {
      remuxResult: remuxResult,
      chunkMeta: chunkMeta
    };
  };
  _proto.transmuxSampleAes = function transmuxSampleAes(data, decryptData, timeOffset, accurateTimeOffset, chunkMeta) {
    var _this3 = this;
    return this.demuxer.demuxSampleAes(data, decryptData, timeOffset).then(function (demuxResult) {
      var remuxResult = _this3.remuxer.remux(demuxResult.audioTrack, demuxResult.videoTrack, demuxResult.id3Track, demuxResult.textTrack, timeOffset, accurateTimeOffset, false, _this3.id);
      return {
        remuxResult: remuxResult,
        chunkMeta: chunkMeta
      };
    });
  };
  _proto.configureTransmuxer = function configureTransmuxer(data) {
    var config = this.config,
      observer = this.observer,
      typeSupported = this.typeSupported,
      vendor = this.vendor;
    // probe for content type
    var mux;
    for (var i = 0, len = muxConfig.length; i < len; i++) {
      if (muxConfig[i].demux.probe(data)) {
        mux = muxConfig[i];
        break;
      }
    }
    if (!mux) {
      // If probing previous configs fail, use mp4 passthrough
      _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.warn('Failed to find demuxer by probing frag, treating as mp4 passthrough');
      mux = {
        demux: _demux_mp4demuxer__WEBPACK_IMPORTED_MODULE_4__["default"],
        remux: _remux_passthrough_remuxer__WEBPACK_IMPORTED_MODULE_8__["default"]
      };
    }
    // so let's check that current remuxer and demuxer are still valid
    var demuxer = this.demuxer;
    var remuxer = this.remuxer;
    var Remuxer = mux.remux;
    var Demuxer = mux.demux;
    if (!remuxer || !(remuxer instanceof Remuxer)) {
      this.remuxer = new Remuxer(observer, config, typeSupported, vendor);
    }
    if (!demuxer || !(demuxer instanceof Demuxer)) {
      this.demuxer = new Demuxer(observer, config, typeSupported);
      this.probe = Demuxer.probe;
    }
  };
  _proto.needsProbing = function needsProbing(discontinuity, trackSwitch) {
    // in case of continuity change, or track switch
    // we might switch from content type (AAC container to TS container, or TS to fmp4 for example)
    return !this.demuxer || !this.remuxer || discontinuity || trackSwitch;
  };
  _proto.getDecrypter = function getDecrypter() {
    var decrypter = this.decrypter;
    if (!decrypter) {
      decrypter = this.decrypter = new _crypt_decrypter__WEBPACK_IMPORTED_MODULE_2__["default"](this.config);
    }
    return decrypter;
  };
  return Transmuxer;
}();

function getEncryptionType(data, decryptData) {
  var encryptionType = null;
  if (data.byteLength > 0 && decryptData != null && decryptData.key != null && decryptData.iv !== null && decryptData.method != null) {
    encryptionType = decryptData;
  }
  return encryptionType;
}
var emptyResult = function emptyResult(chunkMeta) {
  return {
    remuxResult: {},
    chunkMeta: chunkMeta
  };
};
function isPromise(p) {
  return 'then' in p && p.then instanceof Function;
}
var TransmuxConfig = function TransmuxConfig(audioCodec, videoCodec, initSegmentData, duration, defaultInitPts) {
  this.audioCodec = void 0;
  this.videoCodec = void 0;
  this.initSegmentData = void 0;
  this.duration = void 0;
  this.defaultInitPts = void 0;
  this.audioCodec = audioCodec;
  this.videoCodec = videoCodec;
  this.initSegmentData = initSegmentData;
  this.duration = duration;
  this.defaultInitPts = defaultInitPts;
};
var TransmuxState = function TransmuxState(discontinuity, contiguous, accurateTimeOffset, trackSwitch, timeOffset, initSegmentChange) {
  this.discontinuity = void 0;
  this.contiguous = void 0;
  this.accurateTimeOffset = void 0;
  this.trackSwitch = void 0;
  this.timeOffset = void 0;
  this.initSegmentChange = void 0;
  this.discontinuity = discontinuity;
  this.contiguous = contiguous;
  this.accurateTimeOffset = accurateTimeOffset;
  this.trackSwitch = trackSwitch;
  this.timeOffset = timeOffset;
  this.initSegmentChange = initSegmentChange;
};

/***/ }),

/***/ "./src/demux/tsdemuxer.ts":
/*!********************************!*\
  !*** ./src/demux/tsdemuxer.ts ***!
  \********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _adts__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./adts */ "./src/demux/adts.ts");
/* harmony import */ var _mpegaudio__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./mpegaudio */ "./src/demux/mpegaudio.ts");
/* harmony import */ var _exp_golomb__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./exp-golomb */ "./src/demux/exp-golomb.ts");
/* harmony import */ var _sample_aes__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ./sample-aes */ "./src/demux/sample-aes.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../utils/mp4-tools */ "./src/utils/mp4-tools.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _types_demuxer__WEBPACK_IMPORTED_MODULE_8__ = __webpack_require__(/*! ../types/demuxer */ "./src/types/demuxer.ts");
function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
/**
 * highly optimized TS demuxer:
 * parse PAT, PMT
 * extract PES packet from audio and video PIDs
 * extract AVC/H264 NAL units and AAC/ADTS samples from PES packet
 * trigger the remuxer upon parsing completion
 * it also tries to workaround as best as it can audio codec switch (HE-AAC to AAC and vice versa), without having to restart the MediaSource.
 * it also controls the remuxing process :
 * upon discontinuity or level switch detection, it will also notifies the remuxer so that it can reset its state.
 */










var PACKET_LENGTH = 188;
var TSDemuxer = /*#__PURE__*/function () {
  function TSDemuxer(observer, config, typeSupported) {
    this.observer = void 0;
    this.config = void 0;
    this.typeSupported = void 0;
    this.sampleAes = null;
    this.pmtParsed = false;
    this.audioCodec = void 0;
    this.videoCodec = void 0;
    this._duration = 0;
    this._pmtId = -1;
    this._avcTrack = void 0;
    this._audioTrack = void 0;
    this._id3Track = void 0;
    this._txtTrack = void 0;
    this.aacOverFlow = null;
    this.avcSample = null;
    this.remainderData = null;
    this.observer = observer;
    this.config = config;
    this.typeSupported = typeSupported;
  }
  TSDemuxer.probe = function probe(data) {
    var syncOffset = TSDemuxer.syncOffset(data);
    if (syncOffset > 0) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.warn("MPEG2-TS detected but first sync word found @ offset " + syncOffset);
    }
    return syncOffset !== -1;
  };
  TSDemuxer.syncOffset = function syncOffset(data) {
    var length = data.length;
    var scanwindow = Math.min(PACKET_LENGTH * 5, data.length - PACKET_LENGTH) + 1;
    var i = 0;
    while (i < scanwindow) {
      // a TS init segment should contain at least 2 TS packets: PAT and PMT, each starting with 0x47
      var foundPat = false;
      for (var j = i; j < length; j += PACKET_LENGTH) {
        if (data[j] === 0x47) {
          if (!foundPat && parsePID(data, j) === 0) {
            foundPat = true;
          }
          if (foundPat && j + PACKET_LENGTH > scanwindow) {
            return i;
          }
        } else {
          break;
        }
      }
      i++;
    }
    return -1;
  }

  /**
   * Creates a track model internal to demuxer used to drive remuxing input
   *
   * @param type 'audio' | 'video' | 'id3' | 'text'
   * @param duration
   * @return TSDemuxer's internal track model
   */;
  TSDemuxer.createTrack = function createTrack(type, duration) {
    return {
      container: type === 'video' || type === 'audio' ? 'video/mp2t' : undefined,
      type: type,
      id: _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_5__.RemuxerTrackIdConfig[type],
      pid: -1,
      inputTimeScale: 90000,
      sequenceNumber: 0,
      samples: [],
      dropped: 0,
      duration: type === 'audio' ? duration : undefined
    };
  }

  /**
   * Initializes a new init segment on the demuxer/remuxer interface. Needed for discontinuities/track-switches (or at stream start)
   * Resets all internal track instances of the demuxer.
   */;
  var _proto = TSDemuxer.prototype;
  _proto.resetInitSegment = function resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration) {
    this.pmtParsed = false;
    this._pmtId = -1;
    this._avcTrack = TSDemuxer.createTrack('video');
    this._audioTrack = TSDemuxer.createTrack('audio', trackDuration);
    this._id3Track = TSDemuxer.createTrack('id3');
    this._txtTrack = TSDemuxer.createTrack('text');
    this._audioTrack.segmentCodec = 'aac';

    // flush any partial content
    this.aacOverFlow = null;
    this.avcSample = null;
    this.remainderData = null;
    this.audioCodec = audioCodec;
    this.videoCodec = videoCodec;
    this._duration = trackDuration;
  };
  _proto.resetTimeStamp = function resetTimeStamp() {};
  _proto.resetContiguity = function resetContiguity() {
    var _audioTrack = this._audioTrack,
      _avcTrack = this._avcTrack,
      _id3Track = this._id3Track;
    if (_audioTrack) {
      _audioTrack.pesData = null;
    }
    if (_avcTrack) {
      _avcTrack.pesData = null;
    }
    if (_id3Track) {
      _id3Track.pesData = null;
    }
    this.aacOverFlow = null;
    this.avcSample = null;
    this.remainderData = null;
  };
  _proto.demux = function demux(data, timeOffset, isSampleAes, flush) {
    if (isSampleAes === void 0) {
      isSampleAes = false;
    }
    if (flush === void 0) {
      flush = false;
    }
    if (!isSampleAes) {
      this.sampleAes = null;
    }
    var pes;
    var videoTrack = this._avcTrack;
    var audioTrack = this._audioTrack;
    var id3Track = this._id3Track;
    var textTrack = this._txtTrack;
    var avcId = videoTrack.pid;
    var avcData = videoTrack.pesData;
    var audioId = audioTrack.pid;
    var id3Id = id3Track.pid;
    var audioData = audioTrack.pesData;
    var id3Data = id3Track.pesData;
    var unknownPID = null;
    var pmtParsed = this.pmtParsed;
    var pmtId = this._pmtId;
    var len = data.length;
    if (this.remainderData) {
      data = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_5__.appendUint8Array)(this.remainderData, data);
      len = data.length;
      this.remainderData = null;
    }
    if (len < PACKET_LENGTH && !flush) {
      this.remainderData = data;
      return {
        audioTrack: audioTrack,
        videoTrack: videoTrack,
        id3Track: id3Track,
        textTrack: textTrack
      };
    }
    var syncOffset = Math.max(0, TSDemuxer.syncOffset(data));
    len -= (len - syncOffset) % PACKET_LENGTH;
    if (len < data.byteLength && !flush) {
      this.remainderData = new Uint8Array(data.buffer, len, data.buffer.byteLength - len);
    }

    // loop through TS packets
    var tsPacketErrors = 0;
    for (var start = syncOffset; start < len; start += PACKET_LENGTH) {
      if (data[start] === 0x47) {
        var stt = !!(data[start + 1] & 0x40);
        var pid = parsePID(data, start);
        var atf = (data[start + 3] & 0x30) >> 4;

        // if an adaption field is present, its length is specified by the fifth byte of the TS packet header.
        var offset = void 0;
        if (atf > 1) {
          offset = start + 5 + data[start + 4];
          // continue if there is only adaptation field
          if (offset === start + PACKET_LENGTH) {
            continue;
          }
        } else {
          offset = start + 4;
        }
        switch (pid) {
          case avcId:
            if (stt) {
              if (avcData && (pes = parsePES(avcData))) {
                this.parseAVCPES(videoTrack, textTrack, pes, false);
              }
              avcData = {
                data: [],
                size: 0
              };
            }
            if (avcData) {
              avcData.data.push(data.subarray(offset, start + PACKET_LENGTH));
              avcData.size += start + PACKET_LENGTH - offset;
            }
            break;
          case audioId:
            if (stt) {
              if (audioData && (pes = parsePES(audioData))) {
                switch (audioTrack.segmentCodec) {
                  case 'aac':
                    this.parseAACPES(audioTrack, pes);
                    break;
                  case 'mp3':
                    this.parseMPEGPES(audioTrack, pes);
                    break;
                }
              }
              audioData = {
                data: [],
                size: 0
              };
            }
            if (audioData) {
              audioData.data.push(data.subarray(offset, start + PACKET_LENGTH));
              audioData.size += start + PACKET_LENGTH - offset;
            }
            break;
          case id3Id:
            if (stt) {
              if (id3Data && (pes = parsePES(id3Data))) {
                this.parseID3PES(id3Track, pes);
              }
              id3Data = {
                data: [],
                size: 0
              };
            }
            if (id3Data) {
              id3Data.data.push(data.subarray(offset, start + PACKET_LENGTH));
              id3Data.size += start + PACKET_LENGTH - offset;
            }
            break;
          case 0:
            if (stt) {
              offset += data[offset] + 1;
            }
            pmtId = this._pmtId = parsePAT(data, offset);
            // logger.log('PMT PID:'  + this._pmtId);
            break;
          case pmtId:
            {
              if (stt) {
                offset += data[offset] + 1;
              }
              var parsedPIDs = parsePMT(data, offset, this.typeSupported, isSampleAes);

              // only update track id if track PID found while parsing PMT
              // this is to avoid resetting the PID to -1 in case
              // track PID transiently disappears from the stream
              // this could happen in case of transient missing audio samples for example
              // NOTE this is only the PID of the track as found in TS,
              // but we are not using this for MP4 track IDs.
              avcId = parsedPIDs.avc;
              if (avcId > 0) {
                videoTrack.pid = avcId;
              }
              audioId = parsedPIDs.audio;
              if (audioId > 0) {
                audioTrack.pid = audioId;
                audioTrack.segmentCodec = parsedPIDs.segmentCodec;
              }
              id3Id = parsedPIDs.id3;
              if (id3Id > 0) {
                id3Track.pid = id3Id;
              }
              if (unknownPID !== null && !pmtParsed) {
                _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.warn("MPEG-TS PMT found at " + start + " after unknown PID '" + unknownPID + "'. Backtracking to sync byte @" + syncOffset + " to parse all TS packets.");
                unknownPID = null;
                // we set it to -188, the += 188 in the for loop will reset start to 0
                start = syncOffset - 188;
              }
              pmtParsed = this.pmtParsed = true;
              break;
            }
          case 0x11:
          case 0x1fff:
            break;
          default:
            unknownPID = pid;
            break;
        }
      } else {
        tsPacketErrors++;
      }
    }
    if (tsPacketErrors > 0) {
      this.observer.emit(_events__WEBPACK_IMPORTED_MODULE_4__.Events.ERROR, _events__WEBPACK_IMPORTED_MODULE_4__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_7__.ErrorTypes.MEDIA_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_7__.ErrorDetails.FRAG_PARSING_ERROR,
        fatal: false,
        reason: "Found " + tsPacketErrors + " TS packet/s that do not start with 0x47"
      });
    }
    videoTrack.pesData = avcData;
    audioTrack.pesData = audioData;
    id3Track.pesData = id3Data;
    var demuxResult = {
      audioTrack: audioTrack,
      videoTrack: videoTrack,
      id3Track: id3Track,
      textTrack: textTrack
    };
    if (flush) {
      this.extractRemainingSamples(demuxResult);
    }
    return demuxResult;
  };
  _proto.flush = function flush() {
    var remainderData = this.remainderData;
    this.remainderData = null;
    var result;
    if (remainderData) {
      result = this.demux(remainderData, -1, false, true);
    } else {
      result = {
        videoTrack: this._avcTrack,
        audioTrack: this._audioTrack,
        id3Track: this._id3Track,
        textTrack: this._txtTrack
      };
    }
    this.extractRemainingSamples(result);
    if (this.sampleAes) {
      return this.decrypt(result, this.sampleAes);
    }
    return result;
  };
  _proto.extractRemainingSamples = function extractRemainingSamples(demuxResult) {
    var audioTrack = demuxResult.audioTrack,
      videoTrack = demuxResult.videoTrack,
      id3Track = demuxResult.id3Track,
      textTrack = demuxResult.textTrack;
    var avcData = videoTrack.pesData;
    var audioData = audioTrack.pesData;
    var id3Data = id3Track.pesData;
    // try to parse last PES packets
    var pes;
    if (avcData && (pes = parsePES(avcData))) {
      this.parseAVCPES(videoTrack, textTrack, pes, true);
      videoTrack.pesData = null;
    } else {
      // either avcData null or PES truncated, keep it for next frag parsing
      videoTrack.pesData = avcData;
    }
    if (audioData && (pes = parsePES(audioData))) {
      switch (audioTrack.segmentCodec) {
        case 'aac':
          this.parseAACPES(audioTrack, pes);
          break;
        case 'mp3':
          this.parseMPEGPES(audioTrack, pes);
          break;
      }
      audioTrack.pesData = null;
    } else {
      if (audioData !== null && audioData !== void 0 && audioData.size) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.log('last AAC PES packet truncated,might overlap between fragments');
      }

      // either audioData null or PES truncated, keep it for next frag parsing
      audioTrack.pesData = audioData;
    }
    if (id3Data && (pes = parsePES(id3Data))) {
      this.parseID3PES(id3Track, pes);
      id3Track.pesData = null;
    } else {
      // either id3Data null or PES truncated, keep it for next frag parsing
      id3Track.pesData = id3Data;
    }
  };
  _proto.demuxSampleAes = function demuxSampleAes(data, keyData, timeOffset) {
    var demuxResult = this.demux(data, timeOffset, true, !this.config.progressive);
    var sampleAes = this.sampleAes = new _sample_aes__WEBPACK_IMPORTED_MODULE_3__["default"](this.observer, this.config, keyData);
    return this.decrypt(demuxResult, sampleAes);
  };
  _proto.decrypt = function decrypt(demuxResult, sampleAes) {
    return new Promise(function (resolve) {
      var audioTrack = demuxResult.audioTrack,
        videoTrack = demuxResult.videoTrack;
      if (audioTrack.samples && audioTrack.segmentCodec === 'aac') {
        sampleAes.decryptAacSamples(audioTrack.samples, 0, function () {
          if (videoTrack.samples) {
            sampleAes.decryptAvcSamples(videoTrack.samples, 0, 0, function () {
              resolve(demuxResult);
            });
          } else {
            resolve(demuxResult);
          }
        });
      } else if (videoTrack.samples) {
        sampleAes.decryptAvcSamples(videoTrack.samples, 0, 0, function () {
          resolve(demuxResult);
        });
      }
    });
  };
  _proto.destroy = function destroy() {
    this._duration = 0;
  };
  _proto.parseAVCPES = function parseAVCPES(track, textTrack, pes, last) {
    var _this = this;
    var units = this.parseAVCNALu(track, pes.data);
    var debug = false;
    var avcSample = this.avcSample;
    var push;
    var spsfound = false;
    // free pes.data to save up some memory
    pes.data = null;

    // if new NAL units found and last sample still there, let's push ...
    // this helps parsing streams with missing AUD (only do this if AUD never found)
    if (avcSample && units.length && !track.audFound) {
      pushAccessUnit(avcSample, track);
      avcSample = this.avcSample = createAVCSample(false, pes.pts, pes.dts, '');
    }
    units.forEach(function (unit) {
      switch (unit.type) {
        // NDR
        case 1:
          {
            push = true;
            if (!avcSample) {
              avcSample = _this.avcSample = createAVCSample(true, pes.pts, pes.dts, '');
            }
            if (debug) {
              avcSample.debug += 'NDR ';
            }
            avcSample.frame = true;
            var data = unit.data;
            // only check slice type to detect KF in case SPS found in same packet (any keyframe is preceded by SPS ...)
            if (spsfound && data.length > 4) {
              // retrieve slice type by parsing beginning of NAL unit (follow H264 spec, slice_header definition) to detect keyframe embedded in NDR
              var sliceType = new _exp_golomb__WEBPACK_IMPORTED_MODULE_2__["default"](data).readSliceType();
              // 2 : I slice, 4 : SI slice, 7 : I slice, 9: SI slice
              // SI slice : A slice that is coded using intra prediction only and using quantisation of the prediction samples.
              // An SI slice can be coded such that its decoded samples can be constructed identically to an SP slice.
              // I slice: A slice that is not an SI slice that is decoded using intra prediction only.
              // if (sliceType === 2 || sliceType === 7) {
              if (sliceType === 2 || sliceType === 4 || sliceType === 7 || sliceType === 9) {
                avcSample.key = true;
              }
            }
            break;
            // IDR
          }

        case 5:
          push = true;
          // handle PES not starting with AUD
          if (!avcSample) {
            avcSample = _this.avcSample = createAVCSample(true, pes.pts, pes.dts, '');
          }
          if (debug) {
            avcSample.debug += 'IDR ';
          }
          avcSample.key = true;
          avcSample.frame = true;
          break;
        // SEI
        case 6:
          {
            push = true;
            if (debug && avcSample) {
              avcSample.debug += 'SEI ';
            }
            (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_5__.parseSEIMessageFromNALu)(unit.data, 1, pes.pts, textTrack.samples);
            break;
            // SPS
          }

        case 7:
          push = true;
          spsfound = true;
          if (debug && avcSample) {
            avcSample.debug += 'SPS ';
          }
          if (!track.sps) {
            var expGolombDecoder = new _exp_golomb__WEBPACK_IMPORTED_MODULE_2__["default"](unit.data);
            var config = expGolombDecoder.readSPS();
            track.width = config.width;
            track.height = config.height;
            track.pixelRatio = config.pixelRatio;
            // TODO: `track.sps` is defined as a `number[]`, but we're setting it to a `Uint8Array[]`.
            track.sps = [unit.data];
            track.duration = _this._duration;
            var codecarray = unit.data.subarray(1, 4);
            var codecstring = 'avc1.';
            for (var i = 0; i < 3; i++) {
              var h = codecarray[i].toString(16);
              if (h.length < 2) {
                h = '0' + h;
              }
              codecstring += h;
            }
            track.codec = codecstring;
          }
          break;
        // PPS
        case 8:
          push = true;
          if (debug && avcSample) {
            avcSample.debug += 'PPS ';
          }
          if (!track.pps) {
            // TODO: `track.pss` is defined as a `number[]`, but we're setting it to a `Uint8Array[]`.
            track.pps = [unit.data];
          }
          break;
        // AUD
        case 9:
          push = false;
          track.audFound = true;
          if (avcSample) {
            pushAccessUnit(avcSample, track);
          }
          avcSample = _this.avcSample = createAVCSample(false, pes.pts, pes.dts, debug ? 'AUD ' : '');
          break;
        // Filler Data
        case 12:
          push = true;
          break;
        default:
          push = false;
          if (avcSample) {
            avcSample.debug += 'unknown NAL ' + unit.type + ' ';
          }
          break;
      }
      if (avcSample && push) {
        var _units = avcSample.units;
        _units.push(unit);
      }
    });
    // if last PES packet, push samples
    if (last && avcSample) {
      pushAccessUnit(avcSample, track);
      this.avcSample = null;
    }
  };
  _proto.getLastNalUnit = function getLastNalUnit(samples) {
    var _avcSample;
    var avcSample = this.avcSample;
    var lastUnit;
    // try to fallback to previous sample if current one is empty
    if (!avcSample || avcSample.units.length === 0) {
      avcSample = samples[samples.length - 1];
    }
    if ((_avcSample = avcSample) !== null && _avcSample !== void 0 && _avcSample.units) {
      var units = avcSample.units;
      lastUnit = units[units.length - 1];
    }
    return lastUnit;
  };
  _proto.parseAVCNALu = function parseAVCNALu(track, array) {
    var len = array.byteLength;
    var state = track.naluState || 0;
    var lastState = state;
    var units = [];
    var i = 0;
    var value;
    var overflow;
    var unitType;
    var lastUnitStart = -1;
    var lastUnitType = 0;
    // logger.log('PES:' + Hex.hexDump(array));

    if (state === -1) {
      // special use case where we found 3 or 4-byte start codes exactly at the end of previous PES packet
      lastUnitStart = 0;
      // NALu type is value read from offset 0
      lastUnitType = array[0] & 0x1f;
      state = 0;
      i = 1;
    }
    while (i < len) {
      value = array[i++];
      // optimization. state 0 and 1 are the predominant case. let's handle them outside of the switch/case
      if (!state) {
        state = value ? 0 : 1;
        continue;
      }
      if (state === 1) {
        state = value ? 0 : 2;
        continue;
      }
      // here we have state either equal to 2 or 3
      if (!value) {
        state = 3;
      } else if (value === 1) {
        if (lastUnitStart >= 0) {
          var unit = {
            data: array.subarray(lastUnitStart, i - state - 1),
            type: lastUnitType
          };
          // logger.log('pushing NALU, type/size:' + unit.type + '/' + unit.data.byteLength);
          units.push(unit);
        } else {
          // lastUnitStart is undefined => this is the first start code found in this PES packet
          // first check if start code delimiter is overlapping between 2 PES packets,
          // ie it started in last packet (lastState not zero)
          // and ended at the beginning of this PES packet (i <= 4 - lastState)
          var lastUnit = this.getLastNalUnit(track.samples);
          if (lastUnit) {
            if (lastState && i <= 4 - lastState) {
              // start delimiter overlapping between PES packets
              // strip start delimiter bytes from the end of last NAL unit
              // check if lastUnit had a state different from zero
              if (lastUnit.state) {
                // strip last bytes
                lastUnit.data = lastUnit.data.subarray(0, lastUnit.data.byteLength - lastState);
              }
            }
            // If NAL units are not starting right at the beginning of the PES packet, push preceding data into previous NAL unit.
            overflow = i - state - 1;
            if (overflow > 0) {
              // logger.log('first NALU found with overflow:' + overflow);
              var tmp = new Uint8Array(lastUnit.data.byteLength + overflow);
              tmp.set(lastUnit.data, 0);
              tmp.set(array.subarray(0, overflow), lastUnit.data.byteLength);
              lastUnit.data = tmp;
              lastUnit.state = 0;
            }
          }
        }
        // check if we can read unit type
        if (i < len) {
          unitType = array[i] & 0x1f;
          // logger.log('find NALU @ offset:' + i + ',type:' + unitType);
          lastUnitStart = i;
          lastUnitType = unitType;
          state = 0;
        } else {
          // not enough byte to read unit type. let's read it on next PES parsing
          state = -1;
        }
      } else {
        state = 0;
      }
    }
    if (lastUnitStart >= 0 && state >= 0) {
      var _unit = {
        data: array.subarray(lastUnitStart, len),
        type: lastUnitType,
        state: state
      };
      units.push(_unit);
      // logger.log('pushing NALU, type/size/state:' + unit.type + '/' + unit.data.byteLength + '/' + state);
    }
    // no NALu found
    if (units.length === 0) {
      // append pes.data to previous NAL unit
      var _lastUnit = this.getLastNalUnit(track.samples);
      if (_lastUnit) {
        var _tmp = new Uint8Array(_lastUnit.data.byteLength + array.byteLength);
        _tmp.set(_lastUnit.data, 0);
        _tmp.set(array, _lastUnit.data.byteLength);
        _lastUnit.data = _tmp;
      }
    }
    track.naluState = state;
    return units;
  };
  _proto.parseAACPES = function parseAACPES(track, pes) {
    var startOffset = 0;
    var aacOverFlow = this.aacOverFlow;
    var data = pes.data;
    if (aacOverFlow) {
      this.aacOverFlow = null;
      var frameMissingBytes = aacOverFlow.missing;
      var sampleLength = aacOverFlow.sample.unit.byteLength;
      // logger.log(`AAC: append overflowing ${sampleLength} bytes to beginning of new PES`);
      if (frameMissingBytes === -1) {
        var tmp = new Uint8Array(sampleLength + data.byteLength);
        tmp.set(aacOverFlow.sample.unit, 0);
        tmp.set(data, sampleLength);
        data = tmp;
      } else {
        var frameOverflowBytes = sampleLength - frameMissingBytes;
        aacOverFlow.sample.unit.set(data.subarray(0, frameMissingBytes), frameOverflowBytes);
        track.samples.push(aacOverFlow.sample);
        startOffset = aacOverFlow.missing;
      }
    }
    // look for ADTS header (0xFFFx)
    var offset;
    var len;
    for (offset = startOffset, len = data.length; offset < len - 1; offset++) {
      if (_adts__WEBPACK_IMPORTED_MODULE_0__.isHeader(data, offset)) {
        break;
      }
    }
    // if ADTS header does not start straight from the beginning of the PES payload, raise an error
    if (offset !== startOffset) {
      var reason;
      var fatal;
      if (offset < len - 1) {
        reason = "AAC PES did not start with ADTS header,offset:" + offset;
        fatal = false;
      } else {
        reason = 'no ADTS header found in AAC PES';
        fatal = true;
      }
      _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.warn("parsing error:" + reason);
      this.observer.emit(_events__WEBPACK_IMPORTED_MODULE_4__.Events.ERROR, _events__WEBPACK_IMPORTED_MODULE_4__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_7__.ErrorTypes.MEDIA_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_7__.ErrorDetails.FRAG_PARSING_ERROR,
        fatal: fatal,
        reason: reason
      });
      if (fatal) {
        return;
      }
    }
    _adts__WEBPACK_IMPORTED_MODULE_0__.initTrackConfig(track, this.observer, data, offset, this.audioCodec);
    var pts;
    if (pes.pts !== undefined) {
      pts = pes.pts;
    } else if (aacOverFlow) {
      // if last AAC frame is overflowing, we should ensure timestamps are contiguous:
      // first sample PTS should be equal to last sample PTS + frameDuration
      var frameDuration = _adts__WEBPACK_IMPORTED_MODULE_0__.getFrameDuration(track.samplerate);
      pts = aacOverFlow.sample.pts + frameDuration;
    } else {
      _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.warn('[tsdemuxer]: AAC PES unknown PTS');
      return;
    }

    // scan for aac samples
    var frameIndex = 0;
    var frame;
    while (offset < len) {
      frame = _adts__WEBPACK_IMPORTED_MODULE_0__.appendFrame(track, data, offset, pts, frameIndex);
      offset += frame.length;
      if (!frame.missing) {
        frameIndex++;
        for (; offset < len - 1; offset++) {
          if (_adts__WEBPACK_IMPORTED_MODULE_0__.isHeader(data, offset)) {
            break;
          }
        }
      } else {
        this.aacOverFlow = frame;
        break;
      }
    }
  };
  _proto.parseMPEGPES = function parseMPEGPES(track, pes) {
    var data = pes.data;
    var length = data.length;
    var frameIndex = 0;
    var offset = 0;
    var pts = pes.pts;
    if (pts === undefined) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.warn('[tsdemuxer]: MPEG PES unknown PTS');
      return;
    }
    while (offset < length) {
      if (_mpegaudio__WEBPACK_IMPORTED_MODULE_1__.isHeader(data, offset)) {
        var frame = _mpegaudio__WEBPACK_IMPORTED_MODULE_1__.appendFrame(track, data, offset, pts, frameIndex);
        if (frame) {
          offset += frame.length;
          frameIndex++;
        } else {
          // logger.log('Unable to parse Mpeg audio frame');
          break;
        }
      } else {
        // nothing found, keep looking
        offset++;
      }
    }
  };
  _proto.parseID3PES = function parseID3PES(id3Track, pes) {
    if (pes.pts === undefined) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.warn('[tsdemuxer]: ID3 PES unknown PTS');
      return;
    }
    var id3Sample = _extends({}, pes, {
      type: this._avcTrack ? _types_demuxer__WEBPACK_IMPORTED_MODULE_8__.MetadataSchema.emsg : _types_demuxer__WEBPACK_IMPORTED_MODULE_8__.MetadataSchema.audioId3,
      duration: Number.POSITIVE_INFINITY
    });
    id3Track.samples.push(id3Sample);
  };
  return TSDemuxer;
}();
function createAVCSample(key, pts, dts, debug) {
  return {
    key: key,
    frame: false,
    pts: pts,
    dts: dts,
    units: [],
    debug: debug,
    length: 0
  };
}
function parsePID(data, offset) {
  // pid is a 13-bit field starting at the last bit of TS[1]
  return ((data[offset + 1] & 0x1f) << 8) + data[offset + 2];
}
function parsePAT(data, offset) {
  // skip the PSI header and parse the first PMT entry
  return (data[offset + 10] & 0x1f) << 8 | data[offset + 11];
}
function parsePMT(data, offset, typeSupported, isSampleAes) {
  var result = {
    audio: -1,
    avc: -1,
    id3: -1,
    segmentCodec: 'aac'
  };
  var sectionLength = (data[offset + 1] & 0x0f) << 8 | data[offset + 2];
  var tableEnd = offset + 3 + sectionLength - 4;
  // to determine where the table is, we have to figure out how
  // long the program info descriptors are
  var programInfoLength = (data[offset + 10] & 0x0f) << 8 | data[offset + 11];
  // advance the offset to the first entry in the mapping table
  offset += 12 + programInfoLength;
  while (offset < tableEnd) {
    var pid = parsePID(data, offset);
    switch (data[offset]) {
      case 0xcf:
        // SAMPLE-AES AAC
        if (!isSampleAes) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.log('ADTS AAC with AES-128-CBC frame encryption found in unencrypted stream');
          break;
        }
      /* falls through */
      case 0x0f:
        // ISO/IEC 13818-7 ADTS AAC (MPEG-2 lower bit-rate audio)
        // logger.log('AAC PID:'  + pid);
        if (result.audio === -1) {
          result.audio = pid;
        }
        break;

      // Packetized metadata (ID3)
      case 0x15:
        // logger.log('ID3 PID:'  + pid);
        if (result.id3 === -1) {
          result.id3 = pid;
        }
        break;
      case 0xdb:
        // SAMPLE-AES AVC
        if (!isSampleAes) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.log('H.264 with AES-128-CBC slice encryption found in unencrypted stream');
          break;
        }
      /* falls through */
      case 0x1b:
        // ITU-T Rec. H.264 and ISO/IEC 14496-10 (lower bit-rate video)
        // logger.log('AVC PID:'  + pid);
        if (result.avc === -1) {
          result.avc = pid;
        }
        break;

      // ISO/IEC 11172-3 (MPEG-1 audio)
      // or ISO/IEC 13818-3 (MPEG-2 halved sample rate audio)
      case 0x03:
      case 0x04:
        // logger.log('MPEG PID:'  + pid);
        if (typeSupported.mpeg !== true && typeSupported.mp3 !== true) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.log('MPEG audio found, not supported in this browser');
        } else if (result.audio === -1) {
          result.audio = pid;
          result.segmentCodec = 'mp3';
        }
        break;
      case 0x24:
        _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.warn('Unsupported HEVC stream type found');
        break;
      default:
        // logger.log('unknown stream type:' + data[offset]);
        break;
    }
    // move to the next table entry
    // skip past the elementary stream descriptors, if present
    offset += ((data[offset + 3] & 0x0f) << 8 | data[offset + 4]) + 5;
  }
  return result;
}
function parsePES(stream) {
  var i = 0;
  var frag;
  var pesLen;
  var pesHdrLen;
  var pesPts;
  var pesDts;
  var data = stream.data;
  // safety check
  if (!stream || stream.size === 0) {
    return null;
  }

  // we might need up to 19 bytes to read PES header
  // if first chunk of data is less than 19 bytes, let's merge it with following ones until we get 19 bytes
  // usually only one merge is needed (and this is rare ...)
  while (data[0].length < 19 && data.length > 1) {
    var newData = new Uint8Array(data[0].length + data[1].length);
    newData.set(data[0]);
    newData.set(data[1], data[0].length);
    data[0] = newData;
    data.splice(1, 1);
  }
  // retrieve PTS/DTS from first fragment
  frag = data[0];
  var pesPrefix = (frag[0] << 16) + (frag[1] << 8) + frag[2];
  if (pesPrefix === 1) {
    pesLen = (frag[4] << 8) + frag[5];
    // if PES parsed length is not zero and greater than total received length, stop parsing. PES might be truncated
    // minus 6 : PES header size
    if (pesLen && pesLen > stream.size - 6) {
      return null;
    }
    var pesFlags = frag[7];
    if (pesFlags & 0xc0) {
      /* PES header described here : http://dvd.sourceforge.net/dvdinfo/pes-hdr.html
          as PTS / DTS is 33 bit we cannot use bitwise operator in JS,
          as Bitwise operators treat their operands as a sequence of 32 bits */
      pesPts = (frag[9] & 0x0e) * 536870912 +
      // 1 << 29
      (frag[10] & 0xff) * 4194304 +
      // 1 << 22
      (frag[11] & 0xfe) * 16384 +
      // 1 << 14
      (frag[12] & 0xff) * 128 +
      // 1 << 7
      (frag[13] & 0xfe) / 2;
      if (pesFlags & 0x40) {
        pesDts = (frag[14] & 0x0e) * 536870912 +
        // 1 << 29
        (frag[15] & 0xff) * 4194304 +
        // 1 << 22
        (frag[16] & 0xfe) * 16384 +
        // 1 << 14
        (frag[17] & 0xff) * 128 +
        // 1 << 7
        (frag[18] & 0xfe) / 2;
        if (pesPts - pesDts > 60 * 90000) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.warn(Math.round((pesPts - pesDts) / 90000) + "s delta between PTS and DTS, align them");
          pesPts = pesDts;
        }
      } else {
        pesDts = pesPts;
      }
    }
    pesHdrLen = frag[8];
    // 9 bytes : 6 bytes for PES header + 3 bytes for PES extension
    var payloadStartOffset = pesHdrLen + 9;
    if (stream.size <= payloadStartOffset) {
      return null;
    }
    stream.size -= payloadStartOffset;
    // reassemble PES packet
    var pesData = new Uint8Array(stream.size);
    for (var j = 0, dataLen = data.length; j < dataLen; j++) {
      frag = data[j];
      var len = frag.byteLength;
      if (payloadStartOffset) {
        if (payloadStartOffset > len) {
          // trim full frag if PES header bigger than frag
          payloadStartOffset -= len;
          continue;
        } else {
          // trim partial frag if PES header smaller than frag
          frag = frag.subarray(payloadStartOffset);
          len -= payloadStartOffset;
          payloadStartOffset = 0;
        }
      }
      pesData.set(frag, i);
      i += len;
    }
    if (pesLen) {
      // payload size : remove PES header + PES extension
      pesLen -= pesHdrLen + 3;
    }
    return {
      data: pesData,
      pts: pesPts,
      dts: pesDts,
      len: pesLen
    };
  }
  return null;
}
function pushAccessUnit(avcSample, avcTrack) {
  if (avcSample.units.length && avcSample.frame) {
    // if sample does not have PTS/DTS, patch with last sample PTS/DTS
    if (avcSample.pts === undefined) {
      var samples = avcTrack.samples;
      var nbSamples = samples.length;
      if (nbSamples) {
        var lastSample = samples[nbSamples - 1];
        avcSample.pts = lastSample.pts;
        avcSample.dts = lastSample.dts;
      } else {
        // dropping samples, no timestamp found
        avcTrack.dropped++;
        return;
      }
    }
    avcTrack.samples.push(avcSample);
  }
  if (avcSample.debug.length) {
    _utils_logger__WEBPACK_IMPORTED_MODULE_6__.logger.log(avcSample.pts + '/' + avcSample.dts + ':' + avcSample.debug);
  }
}
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (TSDemuxer);

/***/ }),

/***/ "./src/demux/webworkify-webpack.js":
/*!*****************************************!*\
  !*** ./src/demux/webworkify-webpack.js ***!
  \*****************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* export default binding */ __WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/*
 * Fork of webworkify-webpack with support for Webpack 5
 * https://github.com/wupeng-engineer/webworkify-webpack/blob/db0de7/index.js
*/

var webpackBootstrapFunc = function webpackBootstrapFunc() {
  // webpackBootstrap
  /******/
  var __webpack_modules__ = ENTRY_MODULE;
  /************************************************************************/
  /******/ // The module cache
  /******/
  var __webpack_module_cache__ = {};
  /******/
  /******/ // The require function
  /******/
  var __nested_webpack_require_497__ = function __webpack_require__(moduleId) {
    /******/ // Check if module is in cache
    /******/var cachedModule = __webpack_module_cache__[moduleId];
    /******/
    if (cachedModule !== undefined) {
      /******/return cachedModule.exports;
      /******/
    }
    /******/ // Create a new module (and put it into the cache)
    /******/
    var module = __webpack_module_cache__[moduleId] = {
      /******/ // no module.id needed
      /******/ // no module.loaded needed
      /******/exports: {}
      /******/
    };
    /******/
    /******/ // Execute the module function
    /******/
    __webpack_modules__[moduleId].call(module.exports, module, module.exports, __webpack_require__);
    /******/
    /******/ // Return the exports of the module
    /******/
    return module.exports;
    /******/
  };
  /******/
  /******/ // expose the modules object (__webpack_modules__)
  /******/
  __nested_webpack_require_497__.m = __webpack_modules__;
  /******/
  /************************************************************************/
  /******/ /* webpack/runtime/compat get default export */
  /******/
  (function () {
    /******/ // getDefaultExport function for compatibility with non-harmony modules
    /******/__nested_webpack_require_497__.n = function (module) {
      /******/var getter = module && module.__esModule ? /******/function () {
        return module['default'];
      } : /******/function () {
        return module;
      };
      /******/
      __nested_webpack_require_497__.d(getter, {
        a: getter
      });
      /******/
      return getter;
      /******/
    };
    /******/
  })();
  /******/
  /******/ /* webpack/runtime/define property getters */
  /******/
  (function () {
    /******/ // define getter functions for harmony exports
    /******/__nested_webpack_require_497__.d = function (exports, definition) {
      /******/for (var key in definition) {
        /******/if (__nested_webpack_require_497__.o(definition, key) && !__nested_webpack_require_497__.o(exports, key)) {
          /******/Object.defineProperty(exports, key, {
            enumerable: true,
            get: definition[key]
          });
          /******/
        }
        /******/
      }
      /******/
    };
    /******/
  })();
  /******/
  /******/ /* webpack/runtime/hasOwnProperty shorthand */
  /******/
  (function () {
    /******/__nested_webpack_require_497__.o = function (obj, prop) {
      return Object.prototype.hasOwnProperty.call(obj, prop);
    };
    /******/
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var dependencyRegExp = '\\(\\s*(\/\\*.*?\\*\/)?\\s*.*?(' + moduleNameReqExp + ').*?\\)';
function quoteRegExp(str) {
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}
function isNumeric(n) {
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}
function getModuleDependencies(sources, module, queueName) {
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  ;
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}
/* harmony default export */ function __WEBPACK_DEFAULT_EXPORT__(moduleId, options) {
  options = options || {};
  var sources = {
    main: __webpack_require__.m
  };
  var requiredModules = options.all ? {
    main: Object.keys(sources.main)
  } : getRequiredModules(sources, moduleId);
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    return m !== 'main';
  }).forEach(function (module) {
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    while (requiredModules[module][entryModule]) {
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}

/***/ }),

/***/ "./src/errors.ts":
/*!***********************!*\
  !*** ./src/errors.ts ***!
  \***********************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "ErrorDetails": () => (/* binding */ ErrorDetails),
/* harmony export */   "ErrorTypes": () => (/* binding */ ErrorTypes)
/* harmony export */ });
var ErrorTypes;

/**
 * @enum {ErrorDetails}
 * @typedef {string} ErrorDetail
 */
(function (ErrorTypes) {
  ErrorTypes["NETWORK_ERROR"] = "networkError";
  ErrorTypes["MEDIA_ERROR"] = "mediaError";
  ErrorTypes["KEY_SYSTEM_ERROR"] = "keySystemError";
  ErrorTypes["MUX_ERROR"] = "muxError";
  ErrorTypes["OTHER_ERROR"] = "otherError";
})(ErrorTypes || (ErrorTypes = {}));
var ErrorDetails;
(function (ErrorDetails) {
  ErrorDetails["KEY_SYSTEM_NO_KEYS"] = "keySystemNoKeys";
  ErrorDetails["KEY_SYSTEM_NO_ACCESS"] = "keySystemNoAccess";
  ErrorDetails["KEY_SYSTEM_NO_SESSION"] = "keySystemNoSession";
  ErrorDetails["KEY_SYSTEM_NO_CONFIGURED_LICENSE"] = "keySystemNoConfiguredLicense";
  ErrorDetails["KEY_SYSTEM_LICENSE_REQUEST_FAILED"] = "keySystemLicenseRequestFailed";
  ErrorDetails["KEY_SYSTEM_SERVER_CERTIFICATE_REQUEST_FAILED"] = "keySystemServerCertificateRequestFailed";
  ErrorDetails["KEY_SYSTEM_SERVER_CERTIFICATE_UPDATE_FAILED"] = "keySystemServerCertificateUpdateFailed";
  ErrorDetails["KEY_SYSTEM_SESSION_UPDATE_FAILED"] = "keySystemSessionUpdateFailed";
  ErrorDetails["KEY_SYSTEM_STATUS_OUTPUT_RESTRICTED"] = "keySystemStatusOutputRestricted";
  ErrorDetails["KEY_SYSTEM_STATUS_INTERNAL_ERROR"] = "keySystemStatusInternalError";
  ErrorDetails["MANIFEST_LOAD_ERROR"] = "manifestLoadError";
  ErrorDetails["MANIFEST_LOAD_TIMEOUT"] = "manifestLoadTimeOut";
  ErrorDetails["MANIFEST_PARSING_ERROR"] = "manifestParsingError";
  ErrorDetails["MANIFEST_INCOMPATIBLE_CODECS_ERROR"] = "manifestIncompatibleCodecsError";
  ErrorDetails["LEVEL_EMPTY_ERROR"] = "levelEmptyError";
  ErrorDetails["LEVEL_LOAD_ERROR"] = "levelLoadError";
  ErrorDetails["LEVEL_LOAD_TIMEOUT"] = "levelLoadTimeOut";
  ErrorDetails["LEVEL_SWITCH_ERROR"] = "levelSwitchError";
  ErrorDetails["AUDIO_TRACK_LOAD_ERROR"] = "audioTrackLoadError";
  ErrorDetails["AUDIO_TRACK_LOAD_TIMEOUT"] = "audioTrackLoadTimeOut";
  ErrorDetails["SUBTITLE_LOAD_ERROR"] = "subtitleTrackLoadError";
  ErrorDetails["SUBTITLE_TRACK_LOAD_TIMEOUT"] = "subtitleTrackLoadTimeOut";
  ErrorDetails["FRAG_LOAD_ERROR"] = "fragLoadError";
  ErrorDetails["FRAG_LOAD_TIMEOUT"] = "fragLoadTimeOut";
  ErrorDetails["FRAG_DECRYPT_ERROR"] = "fragDecryptError";
  ErrorDetails["FRAG_PARSING_ERROR"] = "fragParsingError";
  ErrorDetails["REMUX_ALLOC_ERROR"] = "remuxAllocError";
  ErrorDetails["KEY_LOAD_ERROR"] = "keyLoadError";
  ErrorDetails["KEY_LOAD_TIMEOUT"] = "keyLoadTimeOut";
  ErrorDetails["BUFFER_ADD_CODEC_ERROR"] = "bufferAddCodecError";
  ErrorDetails["BUFFER_INCOMPATIBLE_CODECS_ERROR"] = "bufferIncompatibleCodecsError";
  ErrorDetails["BUFFER_APPEND_ERROR"] = "bufferAppendError";
  ErrorDetails["BUFFER_APPENDING_ERROR"] = "bufferAppendingError";
  ErrorDetails["BUFFER_STALLED_ERROR"] = "bufferStalledError";
  ErrorDetails["BUFFER_FULL_ERROR"] = "bufferFullError";
  ErrorDetails["BUFFER_SEEK_OVER_HOLE"] = "bufferSeekOverHole";
  ErrorDetails["BUFFER_NUDGE_ON_STALL"] = "bufferNudgeOnStall";
  ErrorDetails["INTERNAL_EXCEPTION"] = "internalException";
  ErrorDetails["INTERNAL_ABORTED"] = "aborted";
  ErrorDetails["UNKNOWN"] = "unknown";
})(ErrorDetails || (ErrorDetails = {}));

/***/ }),

/***/ "./src/events.ts":
/*!***********************!*\
  !*** ./src/events.ts ***!
  \***********************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "Events": () => (/* binding */ Events)
/* harmony export */ });
/**
 * @readonly
 * @enum {string}
 */
var Events;
(function (Events) {
  Events["MEDIA_ATTACHING"] = "hlsMediaAttaching";
  Events["MEDIA_ATTACHED"] = "hlsMediaAttached";
  Events["MEDIA_DETACHING"] = "hlsMediaDetaching";
  Events["MEDIA_DETACHED"] = "hlsMediaDetached";
  Events["BUFFER_RESET"] = "hlsBufferReset";
  Events["BUFFER_CODECS"] = "hlsBufferCodecs";
  Events["BUFFER_CREATED"] = "hlsBufferCreated";
  Events["BUFFER_APPENDING"] = "hlsBufferAppending";
  Events["BUFFER_APPENDED"] = "hlsBufferAppended";
  Events["BUFFER_EOS"] = "hlsBufferEos";
  Events["BUFFER_FLUSHING"] = "hlsBufferFlushing";
  Events["BUFFER_FLUSHED"] = "hlsBufferFlushed";
  Events["MANIFEST_LOADING"] = "hlsManifestLoading";
  Events["MANIFEST_LOADED"] = "hlsManifestLoaded";
  Events["MANIFEST_PARSED"] = "hlsManifestParsed";
  Events["LEVEL_SWITCHING"] = "hlsLevelSwitching";
  Events["LEVEL_SWITCHED"] = "hlsLevelSwitched";
  Events["LEVEL_LOADING"] = "hlsLevelLoading";
  Events["LEVEL_LOADED"] = "hlsLevelLoaded";
  Events["LEVEL_UPDATED"] = "hlsLevelUpdated";
  Events["LEVEL_PTS_UPDATED"] = "hlsLevelPtsUpdated";
  Events["LEVELS_UPDATED"] = "hlsLevelsUpdated";
  Events["AUDIO_TRACKS_UPDATED"] = "hlsAudioTracksUpdated";
  Events["AUDIO_TRACK_SWITCHING"] = "hlsAudioTrackSwitching";
  Events["AUDIO_TRACK_SWITCHED"] = "hlsAudioTrackSwitched";
  Events["AUDIO_TRACK_LOADING"] = "hlsAudioTrackLoading";
  Events["AUDIO_TRACK_LOADED"] = "hlsAudioTrackLoaded";
  Events["SUBTITLE_TRACKS_UPDATED"] = "hlsSubtitleTracksUpdated";
  Events["SUBTITLE_TRACKS_CLEARED"] = "hlsSubtitleTracksCleared";
  Events["SUBTITLE_TRACK_SWITCH"] = "hlsSubtitleTrackSwitch";
  Events["SUBTITLE_TRACK_LOADING"] = "hlsSubtitleTrackLoading";
  Events["SUBTITLE_TRACK_LOADED"] = "hlsSubtitleTrackLoaded";
  Events["SUBTITLE_FRAG_PROCESSED"] = "hlsSubtitleFragProcessed";
  Events["CUES_PARSED"] = "hlsCuesParsed";
  Events["NON_NATIVE_TEXT_TRACKS_FOUND"] = "hlsNonNativeTextTracksFound";
  Events["INIT_PTS_FOUND"] = "hlsInitPtsFound";
  Events["FRAG_LOADING"] = "hlsFragLoading";
  Events["FRAG_LOAD_EMERGENCY_ABORTED"] = "hlsFragLoadEmergencyAborted";
  Events["FRAG_LOADED"] = "hlsFragLoaded";
  Events["FRAG_DECRYPTED"] = "hlsFragDecrypted";
  Events["FRAG_PARSING_INIT_SEGMENT"] = "hlsFragParsingInitSegment";
  Events["FRAG_PARSING_USERDATA"] = "hlsFragParsingUserdata";
  Events["FRAG_PARSING_METADATA"] = "hlsFragParsingMetadata";
  Events["FRAG_PARSED"] = "hlsFragParsed";
  Events["FRAG_BUFFERED"] = "hlsFragBuffered";
  Events["FRAG_CHANGED"] = "hlsFragChanged";
  Events["FPS_DROP"] = "hlsFpsDrop";
  Events["FPS_DROP_LEVEL_CAPPING"] = "hlsFpsDropLevelCapping";
  Events["ERROR"] = "hlsError";
  Events["DESTROYING"] = "hlsDestroying";
  Events["KEY_LOADING"] = "hlsKeyLoading";
  Events["KEY_LOADED"] = "hlsKeyLoaded";
  Events["LIVE_BACK_BUFFER_REACHED"] = "hlsLiveBackBufferReached";
  Events["BACK_BUFFER_REACHED"] = "hlsBackBufferReached";
})(Events || (Events = {}));

/***/ }),

/***/ "./src/hls.ts":
/*!********************!*\
  !*** ./src/hls.ts ***!
  \********************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ Hls)
/* harmony export */ });
/* harmony import */ var url_toolkit__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! url-toolkit */ "./node_modules/url-toolkit/src/url-toolkit.js");
/* harmony import */ var url_toolkit__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(url_toolkit__WEBPACK_IMPORTED_MODULE_0__);
/* harmony import */ var _loader_playlist_loader__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./loader/playlist-loader */ "./src/loader/playlist-loader.ts");
/* harmony import */ var _controller_id3_track_controller__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./controller/id3-track-controller */ "./src/controller/id3-track-controller.ts");
/* harmony import */ var _controller_latency_controller__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ./controller/latency-controller */ "./src/controller/latency-controller.ts");
/* harmony import */ var _controller_level_controller__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ./controller/level-controller */ "./src/controller/level-controller.ts");
/* harmony import */ var _controller_fragment_tracker__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ./controller/fragment-tracker */ "./src/controller/fragment-tracker.ts");
/* harmony import */ var _loader_key_loader__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ./loader/key-loader */ "./src/loader/key-loader.ts");
/* harmony import */ var _controller_stream_controller__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ./controller/stream-controller */ "./src/controller/stream-controller.ts");
/* harmony import */ var _is_supported__WEBPACK_IMPORTED_MODULE_8__ = __webpack_require__(/*! ./is-supported */ "./src/is-supported.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_9__ = __webpack_require__(/*! ./utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _config__WEBPACK_IMPORTED_MODULE_10__ = __webpack_require__(/*! ./config */ "./src/config.ts");
/* harmony import */ var eventemitter3__WEBPACK_IMPORTED_MODULE_11__ = __webpack_require__(/*! eventemitter3 */ "./node_modules/eventemitter3/index.js");
/* harmony import */ var eventemitter3__WEBPACK_IMPORTED_MODULE_11___default = /*#__PURE__*/__webpack_require__.n(eventemitter3__WEBPACK_IMPORTED_MODULE_11__);
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_12__ = __webpack_require__(/*! ./events */ "./src/events.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_13__ = __webpack_require__(/*! ./errors */ "./src/errors.ts");
/* harmony import */ var _types_level__WEBPACK_IMPORTED_MODULE_14__ = __webpack_require__(/*! ./types/level */ "./src/types/level.ts");
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }















/**
 * @module Hls
 * @class
 * @constructor
 */
var Hls = /*#__PURE__*/function () {
  Hls.isSupported = function isSupported() {
    return (0,_is_supported__WEBPACK_IMPORTED_MODULE_8__.isSupported)();
  };
  /**
   * Creates an instance of an HLS client that can attach to exactly one `HTMLMediaElement`.
   *
   * @constructs Hls
   * @param {HlsConfig} config
   */
  function Hls(userConfig) {
    if (userConfig === void 0) {
      userConfig = {};
    }
    this.config = void 0;
    this.userConfig = void 0;
    this.coreComponents = void 0;
    this.networkControllers = void 0;
    this._emitter = new eventemitter3__WEBPACK_IMPORTED_MODULE_11__.EventEmitter();
    this._autoLevelCapping = void 0;
    this._maxHdcpLevel = null;
    this.abrController = void 0;
    this.bufferController = void 0;
    this.capLevelController = void 0;
    this.latencyController = void 0;
    this.levelController = void 0;
    this.streamController = void 0;
    this.audioTrackController = void 0;
    this.subtitleTrackController = void 0;
    this.emeController = void 0;
    this.cmcdController = void 0;
    this._media = null;
    this.url = null;
    var config = this.config = (0,_config__WEBPACK_IMPORTED_MODULE_10__.mergeConfig)(Hls.DefaultConfig, userConfig);
    this.userConfig = userConfig;
    (0,_utils_logger__WEBPACK_IMPORTED_MODULE_9__.enableLogs)(config.debug, 'Hls instance');
    this._autoLevelCapping = -1;
    if (config.progressive) {
      (0,_config__WEBPACK_IMPORTED_MODULE_10__.enableStreamingMode)(config);
    }

    // core controllers and network loaders
    var ConfigAbrController = config.abrController,
      ConfigBufferController = config.bufferController,
      ConfigCapLevelController = config.capLevelController,
      ConfigFpsController = config.fpsController;
    var abrController = this.abrController = new ConfigAbrController(this);
    var bufferController = this.bufferController = new ConfigBufferController(this);
    var capLevelController = this.capLevelController = new ConfigCapLevelController(this);
    var fpsController = new ConfigFpsController(this);
    var playListLoader = new _loader_playlist_loader__WEBPACK_IMPORTED_MODULE_1__["default"](this);
    var id3TrackController = new _controller_id3_track_controller__WEBPACK_IMPORTED_MODULE_2__["default"](this);

    // network controllers
    var levelController = this.levelController = new _controller_level_controller__WEBPACK_IMPORTED_MODULE_4__["default"](this);
    // FragmentTracker must be defined before StreamController because the order of event handling is important
    var fragmentTracker = new _controller_fragment_tracker__WEBPACK_IMPORTED_MODULE_5__.FragmentTracker(this);
    var keyLoader = new _loader_key_loader__WEBPACK_IMPORTED_MODULE_6__["default"](this.config);
    var streamController = this.streamController = new _controller_stream_controller__WEBPACK_IMPORTED_MODULE_7__["default"](this, fragmentTracker, keyLoader);

    // Cap level controller uses streamController to flush the buffer
    capLevelController.setStreamController(streamController);
    // fpsController uses streamController to switch when frames are being dropped
    fpsController.setStreamController(streamController);
    var networkControllers = [playListLoader, levelController, streamController];
    this.networkControllers = networkControllers;
    var coreComponents = [abrController, bufferController, capLevelController, fpsController, id3TrackController, fragmentTracker];
    this.audioTrackController = this.createController(config.audioTrackController, networkControllers);
    var AudioStreamControllerClass = config.audioStreamController;
    if (AudioStreamControllerClass) {
      networkControllers.push(new AudioStreamControllerClass(this, fragmentTracker, keyLoader));
    }
    // subtitleTrackController must be defined before subtitleStreamController because the order of event handling is important
    this.subtitleTrackController = this.createController(config.subtitleTrackController, networkControllers);
    var SubtitleStreamControllerClass = config.subtitleStreamController;
    if (SubtitleStreamControllerClass) {
      networkControllers.push(new SubtitleStreamControllerClass(this, fragmentTracker, keyLoader));
    }
    this.createController(config.timelineController, coreComponents);
    keyLoader.emeController = this.emeController = this.createController(config.emeController, coreComponents);
    this.cmcdController = this.createController(config.cmcdController, coreComponents);
    this.latencyController = this.createController(_controller_latency_controller__WEBPACK_IMPORTED_MODULE_3__["default"], coreComponents);
    this.coreComponents = coreComponents;
  }
  var _proto = Hls.prototype;
  _proto.createController = function createController(ControllerClass, components) {
    if (ControllerClass) {
      var controllerInstance = new ControllerClass(this);
      if (components) {
        components.push(controllerInstance);
      }
      return controllerInstance;
    }
    return null;
  }

  // Delegate the EventEmitter through the public API of Hls.js
  ;
  _proto.on = function on(event, listener, context) {
    if (context === void 0) {
      context = this;
    }
    this._emitter.on(event, listener, context);
  };
  _proto.once = function once(event, listener, context) {
    if (context === void 0) {
      context = this;
    }
    this._emitter.once(event, listener, context);
  };
  _proto.removeAllListeners = function removeAllListeners(event) {
    this._emitter.removeAllListeners(event);
  };
  _proto.off = function off(event, listener, context, once) {
    if (context === void 0) {
      context = this;
    }
    this._emitter.off(event, listener, context, once);
  };
  _proto.listeners = function listeners(event) {
    return this._emitter.listeners(event);
  };
  _proto.emit = function emit(event, name, eventObject) {
    return this._emitter.emit(event, name, eventObject);
  };
  _proto.trigger = function trigger(event, eventObject) {
    if (this.config.debug) {
      return this.emit(event, event, eventObject);
    } else {
      try {
        return this.emit(event, event, eventObject);
      } catch (e) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.error('An internal error happened while handling event ' + event + '. Error message: "' + e.message + '". Here is a stacktrace:', e);
        this.trigger(_events__WEBPACK_IMPORTED_MODULE_12__.Events.ERROR, {
          type: _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorTypes.OTHER_ERROR,
          details: _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorDetails.INTERNAL_EXCEPTION,
          fatal: false,
          event: event,
          error: e
        });
      }
    }
    return false;
  };
  _proto.listenerCount = function listenerCount(event) {
    return this._emitter.listenerCount(event);
  }

  /**
   * Dispose of the instance
   */;
  _proto.destroy = function destroy() {
    _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log('destroy');
    this.trigger(_events__WEBPACK_IMPORTED_MODULE_12__.Events.DESTROYING, undefined);
    this.detachMedia();
    this.removeAllListeners();
    this._autoLevelCapping = -1;
    this.url = null;
    this.networkControllers.forEach(function (component) {
      return component.destroy();
    });
    this.networkControllers.length = 0;
    this.coreComponents.forEach(function (component) {
      return component.destroy();
    });
    this.coreComponents.length = 0;
  }

  /**
   * Attaches Hls.js to a media element
   * @param {HTMLMediaElement} media
   */;
  _proto.attachMedia = function attachMedia(media) {
    _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log('attachMedia');
    this._media = media;
    this.trigger(_events__WEBPACK_IMPORTED_MODULE_12__.Events.MEDIA_ATTACHING, {
      media: media
    });
  }

  /**
   * Detach Hls.js from the media
   */;
  _proto.detachMedia = function detachMedia() {
    _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log('detachMedia');
    this.trigger(_events__WEBPACK_IMPORTED_MODULE_12__.Events.MEDIA_DETACHING, undefined);
    this._media = null;
  }

  /**
   * Set the source URL. Can be relative or absolute.
   * @param {string} url
   */;
  _proto.loadSource = function loadSource(url) {
    this.stopLoad();
    var media = this.media;
    var loadedSource = this.url;
    var loadingSource = this.url = url_toolkit__WEBPACK_IMPORTED_MODULE_0__.buildAbsoluteURL(self.location.href, url, {
      alwaysNormalize: true
    });
    _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log("loadSource:" + loadingSource);
    if (media && loadedSource && loadedSource !== loadingSource && this.bufferController.hasSourceTypes()) {
      this.detachMedia();
      this.attachMedia(media);
    }
    // when attaching to a source URL, trigger a playlist load
    this.trigger(_events__WEBPACK_IMPORTED_MODULE_12__.Events.MANIFEST_LOADING, {
      url: url
    });
  }

  /**
   * Start loading data from the stream source.
   * Depending on default config, client starts loading automatically when a source is set.
   *
   * @param {number} startPosition Set the start position to stream from
   * @default -1 None (from earliest point)
   */;
  _proto.startLoad = function startLoad(startPosition) {
    if (startPosition === void 0) {
      startPosition = -1;
    }
    _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log("startLoad(" + startPosition + ")");
    this.networkControllers.forEach(function (controller) {
      controller.startLoad(startPosition);
    });
  }

  /**
   * Stop loading of any stream data.
   */;
  _proto.stopLoad = function stopLoad() {
    _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log('stopLoad');
    this.networkControllers.forEach(function (controller) {
      controller.stopLoad();
    });
  }

  /**
   * Swap through possible audio codecs in the stream (for example to switch from stereo to 5.1)
   */;
  _proto.swapAudioCodec = function swapAudioCodec() {
    _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log('swapAudioCodec');
    this.streamController.swapAudioCodec();
  }

  /**
   * When the media-element fails, this allows to detach and then re-attach it
   * as one call (convenience method).
   *
   * Automatic recovery of media-errors by this process is configurable.
   */;
  _proto.recoverMediaError = function recoverMediaError() {
    _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log('recoverMediaError');
    var media = this._media;
    this.detachMedia();
    if (media) {
      this.attachMedia(media);
    }
  };
  _proto.removeLevel = function removeLevel(levelIndex, urlId) {
    if (urlId === void 0) {
      urlId = 0;
    }
    this.levelController.removeLevel(levelIndex, urlId);
  }

  /**
   * @type {Level[]}
   */;
  _createClass(Hls, [{
    key: "levels",
    get: function get() {
      var levels = this.levelController.levels;
      return levels ? levels : [];
    }

    /**
     * Index of quality level currently played
     * @type {number}
     */
  }, {
    key: "currentLevel",
    get: function get() {
      return this.streamController.currentLevel;
    }

    /**
     * Set quality level index immediately .
     * This will flush the current buffer to replace the quality asap.
     * That means playback will interrupt at least shortly to re-buffer and re-sync eventually.
     * @type {number} -1 for automatic level selection
     */,
    set: function set(newLevel) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log("set currentLevel:" + newLevel);
      this.loadLevel = newLevel;
      this.abrController.clearTimer();
      this.streamController.immediateLevelSwitch();
    }

    /**
     * Index of next quality level loaded as scheduled by stream controller.
     * @type {number}
     */
  }, {
    key: "nextLevel",
    get: function get() {
      return this.streamController.nextLevel;
    }

    /**
     * Set quality level index for next loaded data.
     * This will switch the video quality asap, without interrupting playback.
     * May abort current loading of data, and flush parts of buffer (outside currently played fragment region).
     * @type {number} -1 for automatic level selection
     */,
    set: function set(newLevel) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log("set nextLevel:" + newLevel);
      this.levelController.manualLevel = newLevel;
      this.streamController.nextLevelSwitch();
    }

    /**
     * Return the quality level of the currently or last (of none is loaded currently) segment
     * @type {number}
     */
  }, {
    key: "loadLevel",
    get: function get() {
      return this.levelController.level;
    }

    /**
     * Set quality level index for next loaded data in a conservative way.
     * This will switch the quality without flushing, but interrupt current loading.
     * Thus the moment when the quality switch will appear in effect will only be after the already existing buffer.
     * @type {number} newLevel -1 for automatic level selection
     */,
    set: function set(newLevel) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log("set loadLevel:" + newLevel);
      this.levelController.manualLevel = newLevel;
    }

    /**
     * get next quality level loaded
     * @type {number}
     */
  }, {
    key: "nextLoadLevel",
    get: function get() {
      return this.levelController.nextLoadLevel;
    }

    /**
     * Set quality level of next loaded segment in a fully "non-destructive" way.
     * Same as `loadLevel` but will wait for next switch (until current loading is done).
     * @type {number} level
     */,
    set: function set(level) {
      this.levelController.nextLoadLevel = level;
    }

    /**
     * Return "first level": like a default level, if not set,
     * falls back to index of first level referenced in manifest
     * @type {number}
     */
  }, {
    key: "firstLevel",
    get: function get() {
      return Math.max(this.levelController.firstLevel, this.minAutoLevel);
    }

    /**
     * Sets "first-level", see getter.
     * @type {number}
     */,
    set: function set(newLevel) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log("set firstLevel:" + newLevel);
      this.levelController.firstLevel = newLevel;
    }

    /**
     * Return start level (level of first fragment that will be played back)
     * if not overrided by user, first level appearing in manifest will be used as start level
     * if -1 : automatic start level selection, playback will start from level matching download bandwidth
     * (determined from download of first segment)
     * @type {number}
     */
  }, {
    key: "startLevel",
    get: function get() {
      return this.levelController.startLevel;
    }

    /**
     * set  start level (level of first fragment that will be played back)
     * if not overrided by user, first level appearing in manifest will be used as start level
     * if -1 : automatic start level selection, playback will start from level matching download bandwidth
     * (determined from download of first segment)
     * @type {number} newLevel
     */,
    set: function set(newLevel) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log("set startLevel:" + newLevel);
      // if not in automatic start level detection, ensure startLevel is greater than minAutoLevel
      if (newLevel !== -1) {
        newLevel = Math.max(newLevel, this.minAutoLevel);
      }
      this.levelController.startLevel = newLevel;
    }

    /**
     * Get the current setting for capLevelToPlayerSize
     *
     * @type {boolean}
     */
  }, {
    key: "capLevelToPlayerSize",
    get: function get() {
      return this.config.capLevelToPlayerSize;
    }

    /**
     * set  dynamically set capLevelToPlayerSize against (`CapLevelController`)
     *
     * @type {boolean}
     */,
    set: function set(shouldStartCapping) {
      var newCapLevelToPlayerSize = !!shouldStartCapping;
      if (newCapLevelToPlayerSize !== this.config.capLevelToPlayerSize) {
        if (newCapLevelToPlayerSize) {
          this.capLevelController.startCapping(); // If capping occurs, nextLevelSwitch will happen based on size.
        } else {
          this.capLevelController.stopCapping();
          this.autoLevelCapping = -1;
          this.streamController.nextLevelSwitch(); // Now we're uncapped, get the next level asap.
        }

        this.config.capLevelToPlayerSize = newCapLevelToPlayerSize;
      }
    }

    /**
     * Capping/max level value that should be used by automatic level selection algorithm (`ABRController`)
     * @type {number}
     */
  }, {
    key: "autoLevelCapping",
    get: function get() {
      return this._autoLevelCapping;
    }

    /**
     * get bandwidth estimate
     * @type {number}
     */,
    set:
    /**
     * Capping/max level value that should be used by automatic level selection algorithm (`ABRController`)
     * @type {number}
     */
    function set(newLevel) {
      if (this._autoLevelCapping !== newLevel) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_9__.logger.log("set autoLevelCapping:" + newLevel);
        this._autoLevelCapping = newLevel;
      }
    }
  }, {
    key: "bandwidthEstimate",
    get: function get() {
      var bwEstimator = this.abrController.bwEstimator;
      if (!bwEstimator) {
        return NaN;
      }
      return bwEstimator.getEstimate();
    }
  }, {
    key: "maxHdcpLevel",
    get: function get() {
      return this._maxHdcpLevel;
    },
    set: function set(value) {
      if (_types_level__WEBPACK_IMPORTED_MODULE_14__.HdcpLevels.indexOf(value) > -1) {
        this._maxHdcpLevel = value;
      }
    }

    /**
     * True when automatic level selection enabled
     * @type {boolean}
     */
  }, {
    key: "autoLevelEnabled",
    get: function get() {
      return this.levelController.manualLevel === -1;
    }

    /**
     * Level set manually (if any)
     * @type {number}
     */
  }, {
    key: "manualLevel",
    get: function get() {
      return this.levelController.manualLevel;
    }

    /**
     * min level selectable in auto mode according to config.minAutoBitrate
     * @type {number}
     */
  }, {
    key: "minAutoLevel",
    get: function get() {
      var levels = this.levels,
        minAutoBitrate = this.config.minAutoBitrate;
      if (!levels) return 0;
      var len = levels.length;
      for (var i = 0; i < len; i++) {
        if (levels[i].maxBitrate >= minAutoBitrate) {
          return i;
        }
      }
      return 0;
    }

    /**
     * max level selectable in auto mode according to autoLevelCapping
     * @type {number}
     */
  }, {
    key: "maxAutoLevel",
    get: function get() {
      var levels = this.levels,
        autoLevelCapping = this.autoLevelCapping,
        maxHdcpLevel = this.maxHdcpLevel;
      var maxAutoLevel;
      if (autoLevelCapping === -1 && levels && levels.length) {
        maxAutoLevel = levels.length - 1;
      } else {
        maxAutoLevel = autoLevelCapping;
      }
      if (maxHdcpLevel) {
        for (var i = maxAutoLevel; i--;) {
          var hdcpLevel = levels[i].attrs['HDCP-LEVEL'];
          if (hdcpLevel && hdcpLevel <= maxHdcpLevel) {
            return i;
          }
        }
      }
      return maxAutoLevel;
    }

    /**
     * next automatically selected quality level
     * @type {number}
     */
  }, {
    key: "nextAutoLevel",
    get: function get() {
      // ensure next auto level is between  min and max auto level
      return Math.min(Math.max(this.abrController.nextAutoLevel, this.minAutoLevel), this.maxAutoLevel);
    }

    /**
     * this setter is used to force next auto level.
     * this is useful to force a switch down in auto mode:
     * in case of load error on level N, hls.js can set nextAutoLevel to N-1 for example)
     * forced value is valid for one fragment. upon successful frag loading at forced level,
     * this value will be resetted to -1 by ABR controller.
     * @type {number}
     */,
    set: function set(nextLevel) {
      this.abrController.nextAutoLevel = Math.max(this.minAutoLevel, nextLevel);
    }

    /**
     * get the datetime value relative to media.currentTime for the active level Program Date Time if present
     * @type {Date}
     */
  }, {
    key: "playingDate",
    get: function get() {
      return this.streamController.currentProgramDateTime;
    }
  }, {
    key: "mainForwardBufferInfo",
    get: function get() {
      return this.streamController.getMainFwdBufferInfo();
    }

    /**
     * @type {AudioTrack[]}
     */
  }, {
    key: "audioTracks",
    get: function get() {
      var audioTrackController = this.audioTrackController;
      return audioTrackController ? audioTrackController.audioTracks : [];
    }

    /**
     * index of the selected audio track (index in audio track lists)
     * @type {number}
     */
  }, {
    key: "audioTrack",
    get: function get() {
      var audioTrackController = this.audioTrackController;
      return audioTrackController ? audioTrackController.audioTrack : -1;
    }

    /**
     * selects an audio track, based on its index in audio track lists
     * @type {number}
     */,
    set: function set(audioTrackId) {
      var audioTrackController = this.audioTrackController;
      if (audioTrackController) {
        audioTrackController.audioTrack = audioTrackId;
      }
    }

    /**
     * get alternate subtitle tracks list from playlist
     * @type {MediaPlaylist[]}
     */
  }, {
    key: "subtitleTracks",
    get: function get() {
      var subtitleTrackController = this.subtitleTrackController;
      return subtitleTrackController ? subtitleTrackController.subtitleTracks : [];
    }

    /**
     * index of the selected subtitle track (index in subtitle track lists)
     * @type {number}
     */
  }, {
    key: "subtitleTrack",
    get: function get() {
      var subtitleTrackController = this.subtitleTrackController;
      return subtitleTrackController ? subtitleTrackController.subtitleTrack : -1;
    },
    set:
    /**
     * select an subtitle track, based on its index in subtitle track lists
     * @type {number}
     */
    function set(subtitleTrackId) {
      var subtitleTrackController = this.subtitleTrackController;
      if (subtitleTrackController) {
        subtitleTrackController.subtitleTrack = subtitleTrackId;
      }
    }

    /**
     * @type {boolean}
     */
  }, {
    key: "media",
    get: function get() {
      return this._media;
    }
  }, {
    key: "subtitleDisplay",
    get: function get() {
      var subtitleTrackController = this.subtitleTrackController;
      return subtitleTrackController ? subtitleTrackController.subtitleDisplay : false;
    }

    /**
     * Enable/disable subtitle display rendering
     * @type {boolean}
     */,
    set: function set(value) {
      var subtitleTrackController = this.subtitleTrackController;
      if (subtitleTrackController) {
        subtitleTrackController.subtitleDisplay = value;
      }
    }

    /**
     * get mode for Low-Latency HLS loading
     * @type {boolean}
     */
  }, {
    key: "lowLatencyMode",
    get: function get() {
      return this.config.lowLatencyMode;
    }

    /**
     * Enable/disable Low-Latency HLS part playlist and segment loading, and start live streams at playlist PART-HOLD-BACK rather than HOLD-BACK.
     * @type {boolean}
     */,
    set: function set(mode) {
      this.config.lowLatencyMode = mode;
    }

    /**
     * position (in seconds) of live sync point (ie edge of live position minus safety delay defined by ```hls.config.liveSyncDuration```)
     * @type {number}
     */
  }, {
    key: "liveSyncPosition",
    get: function get() {
      return this.latencyController.liveSyncPosition;
    }

    /**
     * estimated position (in seconds) of live edge (ie edge of live playlist plus time sync playlist advanced)
     * returns 0 before first playlist is loaded
     * @type {number}
     */
  }, {
    key: "latency",
    get: function get() {
      return this.latencyController.latency;
    }

    /**
     * maximum distance from the edge before the player seeks forward to ```hls.liveSyncPosition```
     * configured using ```liveMaxLatencyDurationCount``` (multiple of target duration) or ```liveMaxLatencyDuration```
     * returns 0 before first playlist is loaded
     * @type {number}
     */
  }, {
    key: "maxLatency",
    get: function get() {
      return this.latencyController.maxLatency;
    }

    /**
     * target distance from the edge as calculated by the latency controller
     * @type {number}
     */
  }, {
    key: "targetLatency",
    get: function get() {
      return this.latencyController.targetLatency;
    }

    /**
     * the rate at which the edge of the current live playlist is advancing or 1 if there is none
     * @type {number}
     */
  }, {
    key: "drift",
    get: function get() {
      return this.latencyController.drift;
    }

    /**
     * set to true when startLoad is called before MANIFEST_PARSED event
     * @type {boolean}
     */
  }, {
    key: "forceStartLoad",
    get: function get() {
      return this.streamController.forceStartLoad;
    }
  }], [{
    key: "version",
    get: function get() {
      return "1.3.4";
    }
  }, {
    key: "Events",
    get: function get() {
      return _events__WEBPACK_IMPORTED_MODULE_12__.Events;
    }
  }, {
    key: "ErrorTypes",
    get: function get() {
      return _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorTypes;
    }
  }, {
    key: "ErrorDetails",
    get: function get() {
      return _errors__WEBPACK_IMPORTED_MODULE_13__.ErrorDetails;
    }
  }, {
    key: "DefaultConfig",
    get: function get() {
      if (!Hls.defaultConfig) {
        return _config__WEBPACK_IMPORTED_MODULE_10__.hlsDefaultConfig;
      }
      return Hls.defaultConfig;
    }

    /**
     * @type {HlsConfig}
     */,
    set: function set(defaultConfig) {
      Hls.defaultConfig = defaultConfig;
    }
  }]);
  return Hls;
}();
Hls.defaultConfig = void 0;


/***/ }),

/***/ "./src/is-supported.ts":
/*!*****************************!*\
  !*** ./src/is-supported.ts ***!
  \*****************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "changeTypeSupported": () => (/* binding */ changeTypeSupported),
/* harmony export */   "isSupported": () => (/* binding */ isSupported)
/* harmony export */ });
/* harmony import */ var _utils_mediasource_helper__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./utils/mediasource-helper */ "./src/utils/mediasource-helper.ts");

function getSourceBuffer() {
  return self.SourceBuffer || self.WebKitSourceBuffer;
}
function isSupported() {
  var mediaSource = (0,_utils_mediasource_helper__WEBPACK_IMPORTED_MODULE_0__.getMediaSource)();
  if (!mediaSource) {
    return false;
  }
  var sourceBuffer = getSourceBuffer();
  var isTypeSupported = mediaSource && typeof mediaSource.isTypeSupported === 'function' && mediaSource.isTypeSupported('video/mp4; codecs="avc1.42E01E,mp4a.40.2"');

  // if SourceBuffer is exposed ensure its API is valid
  // safari and old version of Chrome doe not expose SourceBuffer globally so checking SourceBuffer.prototype is impossible
  var sourceBufferValidAPI = !sourceBuffer || sourceBuffer.prototype && typeof sourceBuffer.prototype.appendBuffer === 'function' && typeof sourceBuffer.prototype.remove === 'function';
  return !!isTypeSupported && !!sourceBufferValidAPI;
}
function changeTypeSupported() {
  var _sourceBuffer$prototy;
  var sourceBuffer = getSourceBuffer();
  return typeof (sourceBuffer === null || sourceBuffer === void 0 ? void 0 : (_sourceBuffer$prototy = sourceBuffer.prototype) === null || _sourceBuffer$prototy === void 0 ? void 0 : _sourceBuffer$prototy.changeType) === 'function';
}

/***/ }),

/***/ "./src/loader/date-range.ts":
/*!**********************************!*\
  !*** ./src/loader/date-range.ts ***!
  \**********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "DateRange": () => (/* binding */ DateRange),
/* harmony export */   "DateRangeAttribute": () => (/* binding */ DateRangeAttribute)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _utils_attr_list__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../utils/attr-list */ "./src/utils/attr-list.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");



function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }


var DateRangeAttribute;
(function (DateRangeAttribute) {
  DateRangeAttribute["ID"] = "ID";
  DateRangeAttribute["CLASS"] = "CLASS";
  DateRangeAttribute["START_DATE"] = "START-DATE";
  DateRangeAttribute["DURATION"] = "DURATION";
  DateRangeAttribute["END_DATE"] = "END-DATE";
  DateRangeAttribute["END_ON_NEXT"] = "END-ON-NEXT";
  DateRangeAttribute["PLANNED_DURATION"] = "PLANNED-DURATION";
  DateRangeAttribute["SCTE35_OUT"] = "SCTE35-OUT";
  DateRangeAttribute["SCTE35_IN"] = "SCTE35-IN";
})(DateRangeAttribute || (DateRangeAttribute = {}));
var DateRange = /*#__PURE__*/function () {
  function DateRange(dateRangeAttr, dateRangeWithSameId) {
    this.attr = void 0;
    this._startDate = void 0;
    this._endDate = void 0;
    this._badValueForSameId = void 0;
    if (dateRangeWithSameId) {
      var previousAttr = dateRangeWithSameId.attr;
      for (var key in previousAttr) {
        if (Object.prototype.hasOwnProperty.call(dateRangeAttr, key) && dateRangeAttr[key] !== previousAttr[key]) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_2__.logger.warn("DATERANGE tag attribute: \"" + key + "\" does not match for tags with ID: \"" + dateRangeAttr.ID + "\"");
          this._badValueForSameId = key;
          break;
        }
      }
      // Merge DateRange tags with the same ID
      dateRangeAttr = _extends(new _utils_attr_list__WEBPACK_IMPORTED_MODULE_1__.AttrList({}), previousAttr, dateRangeAttr);
    }
    this.attr = dateRangeAttr;
    this._startDate = new Date(dateRangeAttr[DateRangeAttribute.START_DATE]);
    if (DateRangeAttribute.END_DATE in this.attr) {
      var endDate = new Date(this.attr[DateRangeAttribute.END_DATE]);
      if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(endDate.getTime())) {
        this._endDate = endDate;
      }
    }
  }
  _createClass(DateRange, [{
    key: "id",
    get: function get() {
      return this.attr.ID;
    }
  }, {
    key: "class",
    get: function get() {
      return this.attr.CLASS;
    }
  }, {
    key: "startDate",
    get: function get() {
      return this._startDate;
    }
  }, {
    key: "endDate",
    get: function get() {
      if (this._endDate) {
        return this._endDate;
      }
      var duration = this.duration;
      if (duration !== null) {
        return new Date(this._startDate.getTime() + duration * 1000);
      }
      return null;
    }
  }, {
    key: "duration",
    get: function get() {
      if (DateRangeAttribute.DURATION in this.attr) {
        var duration = this.attr.decimalFloatingPoint(DateRangeAttribute.DURATION);
        if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(duration)) {
          return duration;
        }
      } else if (this._endDate) {
        return (this._endDate.getTime() - this._startDate.getTime()) / 1000;
      }
      return null;
    }
  }, {
    key: "plannedDuration",
    get: function get() {
      if (DateRangeAttribute.PLANNED_DURATION in this.attr) {
        return this.attr.decimalFloatingPoint(DateRangeAttribute.PLANNED_DURATION);
      }
      return null;
    }
  }, {
    key: "endOnNext",
    get: function get() {
      return this.attr.bool(DateRangeAttribute.END_ON_NEXT);
    }
  }, {
    key: "isValid",
    get: function get() {
      return !!this.id && !this._badValueForSameId && (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(this.startDate.getTime()) && (this.duration === null || this.duration >= 0) && (!this.endOnNext || !!this.class);
    }
  }]);
  return DateRange;
}();

/***/ }),

/***/ "./src/loader/fragment-loader.ts":
/*!***************************************!*\
  !*** ./src/loader/fragment-loader.ts ***!
  \***************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "LoadError": () => (/* binding */ LoadError),
/* harmony export */   "default": () => (/* binding */ FragmentLoader)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");


function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _wrapNativeSuper(Class) { var _cache = typeof Map === "function" ? new Map() : undefined; _wrapNativeSuper = function _wrapNativeSuper(Class) { if (Class === null || !_isNativeFunction(Class)) return Class; if (typeof Class !== "function") { throw new TypeError("Super expression must either be null or a function"); } if (typeof _cache !== "undefined") { if (_cache.has(Class)) return _cache.get(Class); _cache.set(Class, Wrapper); } function Wrapper() { return _construct(Class, arguments, _getPrototypeOf(this).constructor); } Wrapper.prototype = Object.create(Class.prototype, { constructor: { value: Wrapper, enumerable: false, writable: true, configurable: true } }); return _setPrototypeOf(Wrapper, Class); }; return _wrapNativeSuper(Class); }
function _construct(Parent, args, Class) { if (_isNativeReflectConstruct()) { _construct = Reflect.construct.bind(); } else { _construct = function _construct(Parent, args, Class) { var a = [null]; a.push.apply(a, args); var Constructor = Function.bind.apply(Parent, a); var instance = new Constructor(); if (Class) _setPrototypeOf(instance, Class.prototype); return instance; }; } return _construct.apply(null, arguments); }
function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
function _isNativeFunction(fn) { return Function.toString.call(fn).indexOf("[native code]") !== -1; }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

var MIN_CHUNK_SIZE = Math.pow(2, 17); // 128kb
var FragmentLoader = /*#__PURE__*/function () {
  function FragmentLoader(config) {
    this.config = void 0;
    this.loader = null;
    this.partLoadTimeout = -1;
    this.config = config;
  }
  var _proto = FragmentLoader.prototype;
  _proto.destroy = function destroy() {
    if (this.loader) {
      this.loader.destroy();
      this.loader = null;
    }
  };
  _proto.abort = function abort() {
    if (this.loader) {
      // Abort the loader for current fragment. Only one may load at any given time
      this.loader.abort();
    }
  };
  _proto.load = function load(frag, _onProgress) {
    var _this = this;
    var url = frag.url;
    if (!url) {
      return Promise.reject(new LoadError({
        type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.NETWORK_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.FRAG_LOAD_ERROR,
        fatal: false,
        frag: frag,
        networkDetails: null
      }, "Fragment does not have a " + (url ? 'part list' : 'url')));
    }
    this.abort();
    var config = this.config;
    var FragmentILoader = config.fLoader;
    var DefaultILoader = config.loader;
    return new Promise(function (resolve, reject) {
      if (_this.loader) {
        _this.loader.destroy();
      }
      var loader = _this.loader = frag.loader = FragmentILoader ? new FragmentILoader(config) : new DefaultILoader(config);
      var loaderContext = createLoaderContext(frag);
      var loaderConfig = {
        timeout: config.fragLoadingTimeOut,
        maxRetry: 0,
        retryDelay: 0,
        maxRetryDelay: config.fragLoadingMaxRetryTimeout,
        highWaterMark: frag.sn === 'initSegment' ? Infinity : MIN_CHUNK_SIZE
      };
      // Assign frag stats to the loader's stats reference
      frag.stats = loader.stats;
      loader.load(loaderContext, loaderConfig, {
        onSuccess: function onSuccess(response, stats, context, networkDetails) {
          _this.resetLoader(frag, loader);
          var payload = response.data;
          if (context.resetIV && frag.decryptdata) {
            frag.decryptdata.iv = new Uint8Array(payload.slice(0, 16));
            payload = payload.slice(16);
          }
          resolve({
            frag: frag,
            part: null,
            payload: payload,
            networkDetails: networkDetails
          });
        },
        onError: function onError(response, context, networkDetails) {
          _this.resetLoader(frag, loader);
          reject(new LoadError({
            type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.NETWORK_ERROR,
            details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.FRAG_LOAD_ERROR,
            fatal: false,
            frag: frag,
            response: response,
            networkDetails: networkDetails
          }));
        },
        onAbort: function onAbort(stats, context, networkDetails) {
          _this.resetLoader(frag, loader);
          reject(new LoadError({
            type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.NETWORK_ERROR,
            details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.INTERNAL_ABORTED,
            fatal: false,
            frag: frag,
            networkDetails: networkDetails
          }));
        },
        onTimeout: function onTimeout(response, context, networkDetails) {
          _this.resetLoader(frag, loader);
          reject(new LoadError({
            type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.NETWORK_ERROR,
            details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.FRAG_LOAD_TIMEOUT,
            fatal: false,
            frag: frag,
            networkDetails: networkDetails
          }));
        },
        onProgress: function onProgress(stats, context, data, networkDetails) {
          if (_onProgress) {
            _onProgress({
              frag: frag,
              part: null,
              payload: data,
              networkDetails: networkDetails
            });
          }
        }
      });
    });
  };
  _proto.loadPart = function loadPart(frag, part, onProgress) {
    var _this2 = this;
    this.abort();
    var config = this.config;
    var FragmentILoader = config.fLoader;
    var DefaultILoader = config.loader;
    return new Promise(function (resolve, reject) {
      if (_this2.loader) {
        _this2.loader.destroy();
      }
      var loader = _this2.loader = frag.loader = FragmentILoader ? new FragmentILoader(config) : new DefaultILoader(config);
      var loaderContext = createLoaderContext(frag, part);
      var loaderConfig = {
        timeout: config.fragLoadingTimeOut,
        maxRetry: 0,
        retryDelay: 0,
        maxRetryDelay: config.fragLoadingMaxRetryTimeout,
        highWaterMark: MIN_CHUNK_SIZE
      };
      // Assign part stats to the loader's stats reference
      part.stats = loader.stats;
      loader.load(loaderContext, loaderConfig, {
        onSuccess: function onSuccess(response, stats, context, networkDetails) {
          _this2.resetLoader(frag, loader);
          _this2.updateStatsFromPart(frag, part);
          var partLoadedData = {
            frag: frag,
            part: part,
            payload: response.data,
            networkDetails: networkDetails
          };
          onProgress(partLoadedData);
          resolve(partLoadedData);
        },
        onError: function onError(response, context, networkDetails) {
          _this2.resetLoader(frag, loader);
          reject(new LoadError({
            type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.NETWORK_ERROR,
            details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.FRAG_LOAD_ERROR,
            fatal: false,
            frag: frag,
            part: part,
            response: response,
            networkDetails: networkDetails
          }));
        },
        onAbort: function onAbort(stats, context, networkDetails) {
          frag.stats.aborted = part.stats.aborted;
          _this2.resetLoader(frag, loader);
          reject(new LoadError({
            type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.NETWORK_ERROR,
            details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.INTERNAL_ABORTED,
            fatal: false,
            frag: frag,
            part: part,
            networkDetails: networkDetails
          }));
        },
        onTimeout: function onTimeout(response, context, networkDetails) {
          _this2.resetLoader(frag, loader);
          reject(new LoadError({
            type: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorTypes.NETWORK_ERROR,
            details: _errors__WEBPACK_IMPORTED_MODULE_1__.ErrorDetails.FRAG_LOAD_TIMEOUT,
            fatal: false,
            frag: frag,
            part: part,
            networkDetails: networkDetails
          }));
        }
      });
    });
  };
  _proto.updateStatsFromPart = function updateStatsFromPart(frag, part) {
    var fragStats = frag.stats;
    var partStats = part.stats;
    var partTotal = partStats.total;
    fragStats.loaded += partStats.loaded;
    if (partTotal) {
      var estTotalParts = Math.round(frag.duration / part.duration);
      var estLoadedParts = Math.min(Math.round(fragStats.loaded / partTotal), estTotalParts);
      var estRemainingParts = estTotalParts - estLoadedParts;
      var estRemainingBytes = estRemainingParts * Math.round(fragStats.loaded / estLoadedParts);
      fragStats.total = fragStats.loaded + estRemainingBytes;
    } else {
      fragStats.total = Math.max(fragStats.loaded, fragStats.total);
    }
    var fragLoading = fragStats.loading;
    var partLoading = partStats.loading;
    if (fragLoading.start) {
      // add to fragment loader latency
      fragLoading.first += partLoading.first - partLoading.start;
    } else {
      fragLoading.start = partLoading.start;
      fragLoading.first = partLoading.first;
    }
    fragLoading.end = partLoading.end;
  };
  _proto.resetLoader = function resetLoader(frag, loader) {
    frag.loader = null;
    if (this.loader === loader) {
      self.clearTimeout(this.partLoadTimeout);
      this.loader = null;
    }
    loader.destroy();
  };
  return FragmentLoader;
}();

function createLoaderContext(frag, part) {
  if (part === void 0) {
    part = null;
  }
  var segment = part || frag;
  var loaderContext = {
    frag: frag,
    part: part,
    responseType: 'arraybuffer',
    url: segment.url,
    headers: {},
    rangeStart: 0,
    rangeEnd: 0
  };
  var start = segment.byteRangeStartOffset;
  var end = segment.byteRangeEndOffset;
  if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(start) && (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(end)) {
    var _frag$decryptdata;
    var byteRangeStart = start;
    var byteRangeEnd = end;
    if (frag.sn === 'initSegment' && ((_frag$decryptdata = frag.decryptdata) === null || _frag$decryptdata === void 0 ? void 0 : _frag$decryptdata.method) === 'AES-128') {
      // MAP segment encrypted with method 'AES-128', when served with HTTP Range,
      // has the unencrypted size specified in the range.
      // Ref: https://tools.ietf.org/html/draft-pantos-hls-rfc8216bis-08#section-6.3.6
      var fragmentLen = end - start;
      if (fragmentLen % 16) {
        byteRangeEnd = end + (16 - fragmentLen % 16);
      }
      if (start !== 0) {
        loaderContext.resetIV = true;
        byteRangeStart = start - 16;
      }
    }
    loaderContext.rangeStart = byteRangeStart;
    loaderContext.rangeEnd = byteRangeEnd;
  }
  return loaderContext;
}
var LoadError = /*#__PURE__*/function (_Error) {
  _inheritsLoose(LoadError, _Error);
  function LoadError(data) {
    var _this3;
    for (var _len = arguments.length, params = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      params[_key - 1] = arguments[_key];
    }
    _this3 = _Error.call.apply(_Error, [this].concat(params)) || this;
    _this3.data = void 0;
    _this3.data = data;
    return _this3;
  }
  return LoadError;
}( /*#__PURE__*/_wrapNativeSuper(Error));

/***/ }),

/***/ "./src/loader/fragment.ts":
/*!********************************!*\
  !*** ./src/loader/fragment.ts ***!
  \********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "BaseSegment": () => (/* binding */ BaseSegment),
/* harmony export */   "ElementaryStreamTypes": () => (/* binding */ ElementaryStreamTypes),
/* harmony export */   "Fragment": () => (/* binding */ Fragment),
/* harmony export */   "Part": () => (/* binding */ Part)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var url_toolkit__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! url-toolkit */ "./node_modules/url-toolkit/src/url-toolkit.js");
/* harmony import */ var url_toolkit__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(url_toolkit__WEBPACK_IMPORTED_MODULE_1__);
/* harmony import */ var _load_stats__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./load-stats */ "./src/loader/load-stats.ts");


function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }


var ElementaryStreamTypes;
(function (ElementaryStreamTypes) {
  ElementaryStreamTypes["AUDIO"] = "audio";
  ElementaryStreamTypes["VIDEO"] = "video";
  ElementaryStreamTypes["AUDIOVIDEO"] = "audiovideo";
})(ElementaryStreamTypes || (ElementaryStreamTypes = {}));
var BaseSegment = /*#__PURE__*/function () {
  // baseurl is the URL to the playlist

  // relurl is the portion of the URL that comes from inside the playlist.

  // Holds the types of data this fragment supports

  function BaseSegment(baseurl) {
    var _this$elementaryStrea;
    this._byteRange = null;
    this._url = null;
    this.baseurl = void 0;
    this.relurl = void 0;
    this.elementaryStreams = (_this$elementaryStrea = {}, _this$elementaryStrea[ElementaryStreamTypes.AUDIO] = null, _this$elementaryStrea[ElementaryStreamTypes.VIDEO] = null, _this$elementaryStrea[ElementaryStreamTypes.AUDIOVIDEO] = null, _this$elementaryStrea);
    this.baseurl = baseurl;
  }

  // setByteRange converts a EXT-X-BYTERANGE attribute into a two element array
  var _proto = BaseSegment.prototype;
  _proto.setByteRange = function setByteRange(value, previous) {
    var params = value.split('@', 2);
    var byteRange = [];
    if (params.length === 1) {
      byteRange[0] = previous ? previous.byteRangeEndOffset : 0;
    } else {
      byteRange[0] = parseInt(params[1]);
    }
    byteRange[1] = parseInt(params[0]) + byteRange[0];
    this._byteRange = byteRange;
  };
  _createClass(BaseSegment, [{
    key: "byteRange",
    get: function get() {
      if (!this._byteRange) {
        return [];
      }
      return this._byteRange;
    }
  }, {
    key: "byteRangeStartOffset",
    get: function get() {
      return this.byteRange[0];
    }
  }, {
    key: "byteRangeEndOffset",
    get: function get() {
      return this.byteRange[1];
    }
  }, {
    key: "url",
    get: function get() {
      if (!this._url && this.baseurl && this.relurl) {
        this._url = (0,url_toolkit__WEBPACK_IMPORTED_MODULE_1__.buildAbsoluteURL)(this.baseurl, this.relurl, {
          alwaysNormalize: true
        });
      }
      return this._url || '';
    },
    set: function set(value) {
      this._url = value;
    }
  }]);
  return BaseSegment;
}();
var Fragment = /*#__PURE__*/function (_BaseSegment) {
  _inheritsLoose(Fragment, _BaseSegment);
  // EXTINF has to be present for a m3u8 to be considered valid

  // sn notates the sequence number for a segment, and if set to a string can be 'initSegment'

  // levelkeys are the EXT-X-KEY tags that apply to this segment for decryption
  // core difference from the private field _decryptdata is the lack of the initialized IV
  // _decryptdata will set the IV for this segment based on the segment number in the fragment

  // A string representing the fragment type

  // A reference to the loader. Set while the fragment is loading, and removed afterwards. Used to abort fragment loading

  // A reference to the key loader. Set while the key is loading, and removed afterwards. Used to abort key loading

  // The level/track index to which the fragment belongs

  // The continuity counter of the fragment

  // The starting Presentation Time Stamp (PTS) of the fragment. Set after transmux complete.

  // The ending Presentation Time Stamp (PTS) of the fragment. Set after transmux complete.

  // The latest Presentation Time Stamp (PTS) appended to the buffer.

  // The starting Decode Time Stamp (DTS) of the fragment. Set after transmux complete.

  // The ending Decode Time Stamp (DTS) of the fragment. Set after transmux complete.

  // The start time of the fragment, as listed in the manifest. Updated after transmux complete.

  // Set by `updateFragPTSDTS` in level-helper

  // The maximum starting Presentation Time Stamp (audio/video PTS) of the fragment. Set after transmux complete.

  // The minimum ending Presentation Time Stamp (audio/video PTS) of the fragment. Set after transmux complete.

  // Load/parse timing information

  // A flag indicating whether the segment was downloaded in order to test bitrate, and was not buffered

  // #EXTINF  segment title

  // The Media Initialization Section for this segment

  // Fragment is the last fragment in the media playlist

  function Fragment(type, baseurl) {
    var _this;
    _this = _BaseSegment.call(this, baseurl) || this;
    _this._decryptdata = null;
    _this.rawProgramDateTime = null;
    _this.programDateTime = null;
    _this.tagList = [];
    _this.duration = 0;
    _this.sn = 0;
    _this.levelkeys = void 0;
    _this.type = void 0;
    _this.loader = null;
    _this.keyLoader = null;
    _this.level = -1;
    _this.cc = 0;
    _this.startPTS = void 0;
    _this.endPTS = void 0;
    _this.appendedPTS = void 0;
    _this.startDTS = void 0;
    _this.endDTS = void 0;
    _this.start = 0;
    _this.deltaPTS = void 0;
    _this.maxStartPTS = void 0;
    _this.minEndPTS = void 0;
    _this.stats = new _load_stats__WEBPACK_IMPORTED_MODULE_2__.LoadStats();
    _this.urlId = 0;
    _this.data = void 0;
    _this.bitrateTest = false;
    _this.title = null;
    _this.initSegment = null;
    _this.endList = void 0;
    _this.type = type;
    return _this;
  }
  var _proto2 = Fragment.prototype;
  _proto2.setKeyFormat = function setKeyFormat(keyFormat) {
    if (this.levelkeys) {
      var _key = this.levelkeys[keyFormat];
      if (_key && !this._decryptdata) {
        this._decryptdata = _key.getDecryptData(this.sn);
      }
    }
  };
  _proto2.abortRequests = function abortRequests() {
    var _this$loader, _this$keyLoader;
    (_this$loader = this.loader) === null || _this$loader === void 0 ? void 0 : _this$loader.abort();
    (_this$keyLoader = this.keyLoader) === null || _this$keyLoader === void 0 ? void 0 : _this$keyLoader.abort();
  };
  _proto2.setElementaryStreamInfo = function setElementaryStreamInfo(type, startPTS, endPTS, startDTS, endDTS, partial) {
    if (partial === void 0) {
      partial = false;
    }
    var elementaryStreams = this.elementaryStreams;
    var info = elementaryStreams[type];
    if (!info) {
      elementaryStreams[type] = {
        startPTS: startPTS,
        endPTS: endPTS,
        startDTS: startDTS,
        endDTS: endDTS,
        partial: partial
      };
      return;
    }
    info.startPTS = Math.min(info.startPTS, startPTS);
    info.endPTS = Math.max(info.endPTS, endPTS);
    info.startDTS = Math.min(info.startDTS, startDTS);
    info.endDTS = Math.max(info.endDTS, endDTS);
  };
  _proto2.clearElementaryStreamInfo = function clearElementaryStreamInfo() {
    var elementaryStreams = this.elementaryStreams;
    elementaryStreams[ElementaryStreamTypes.AUDIO] = null;
    elementaryStreams[ElementaryStreamTypes.VIDEO] = null;
    elementaryStreams[ElementaryStreamTypes.AUDIOVIDEO] = null;
  };
  _createClass(Fragment, [{
    key: "decryptdata",
    get: function get() {
      var levelkeys = this.levelkeys;
      if (!levelkeys && !this._decryptdata) {
        return null;
      }
      if (!this._decryptdata && this.levelkeys && !this.levelkeys.NONE) {
        var _key2 = this.levelkeys.identity;
        if (_key2) {
          this._decryptdata = _key2.getDecryptData(this.sn);
        } else {
          var keyFormats = Object.keys(this.levelkeys);
          if (keyFormats.length === 1) {
            return this._decryptdata = this.levelkeys[keyFormats[0]].getDecryptData(this.sn);
          } else {
            // Multiple keys. key-loader to call Fragment.setKeyFormat based on selected key-system.
          }
        }
      }
      return this._decryptdata;
    }
  }, {
    key: "end",
    get: function get() {
      return this.start + this.duration;
    }
  }, {
    key: "endProgramDateTime",
    get: function get() {
      if (this.programDateTime === null) {
        return null;
      }
      if (!(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(this.programDateTime)) {
        return null;
      }
      var duration = !(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(this.duration) ? 0 : this.duration;
      return this.programDateTime + duration * 1000;
    }
  }, {
    key: "encrypted",
    get: function get() {
      var _this$_decryptdata;
      // At the m3u8-parser level we need to add support for manifest signalled keyformats
      // when we want the fragment to start reporting that it is encrypted.
      // Currently, keyFormat will only be set for identity keys
      if ((_this$_decryptdata = this._decryptdata) !== null && _this$_decryptdata !== void 0 && _this$_decryptdata.encrypted) {
        return true;
      } else if (this.levelkeys) {
        var keyFormats = Object.keys(this.levelkeys);
        var len = keyFormats.length;
        if (len > 1 || len === 1 && this.levelkeys[keyFormats[0]].encrypted) {
          return true;
        }
      }
      return false;
    }
  }]);
  return Fragment;
}(BaseSegment);
var Part = /*#__PURE__*/function (_BaseSegment2) {
  _inheritsLoose(Part, _BaseSegment2);
  function Part(partAttrs, frag, baseurl, index, previous) {
    var _this2;
    _this2 = _BaseSegment2.call(this, baseurl) || this;
    _this2.fragOffset = 0;
    _this2.duration = 0;
    _this2.gap = false;
    _this2.independent = false;
    _this2.relurl = void 0;
    _this2.fragment = void 0;
    _this2.index = void 0;
    _this2.stats = new _load_stats__WEBPACK_IMPORTED_MODULE_2__.LoadStats();
    _this2.duration = partAttrs.decimalFloatingPoint('DURATION');
    _this2.gap = partAttrs.bool('GAP');
    _this2.independent = partAttrs.bool('INDEPENDENT');
    _this2.relurl = partAttrs.enumeratedString('URI');
    _this2.fragment = frag;
    _this2.index = index;
    var byteRange = partAttrs.enumeratedString('BYTERANGE');
    if (byteRange) {
      _this2.setByteRange(byteRange, previous);
    }
    if (previous) {
      _this2.fragOffset = previous.fragOffset + previous.duration;
    }
    return _this2;
  }
  _createClass(Part, [{
    key: "start",
    get: function get() {
      return this.fragment.start + this.fragOffset;
    }
  }, {
    key: "end",
    get: function get() {
      return this.start + this.duration;
    }
  }, {
    key: "loaded",
    get: function get() {
      var elementaryStreams = this.elementaryStreams;
      return !!(elementaryStreams.audio || elementaryStreams.video || elementaryStreams.audiovideo);
    }
  }]);
  return Part;
}(BaseSegment);

/***/ }),

/***/ "./src/loader/key-loader.ts":
/*!**********************************!*\
  !*** ./src/loader/key-loader.ts ***!
  \**********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ KeyLoader)
/* harmony export */ });
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _fragment_loader__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./fragment-loader */ "./src/loader/fragment-loader.ts");


var KeyLoader = /*#__PURE__*/function () {
  function KeyLoader(config) {
    this.config = void 0;
    this.keyUriToKeyInfo = {};
    this.emeController = null;
    this.config = config;
  }
  var _proto = KeyLoader.prototype;
  _proto.abort = function abort() {
    for (var uri in this.keyUriToKeyInfo) {
      var loader = this.keyUriToKeyInfo[uri].loader;
      if (loader) {
        loader.abort();
      }
    }
  };
  _proto.detach = function detach() {
    for (var uri in this.keyUriToKeyInfo) {
      var keyInfo = this.keyUriToKeyInfo[uri];
      // Remove cached EME keys on detach
      if (keyInfo.mediaKeySessionContext || keyInfo.decryptdata.isCommonEncryption) {
        delete this.keyUriToKeyInfo[uri];
      }
    }
  };
  _proto.destroy = function destroy() {
    this.detach();
    for (var uri in this.keyUriToKeyInfo) {
      var loader = this.keyUriToKeyInfo[uri].loader;
      if (loader) {
        loader.destroy();
      }
    }
    this.keyUriToKeyInfo = {};
  };
  _proto.createKeyLoadError = function createKeyLoadError(frag, details, networkDetails, message) {
    if (details === void 0) {
      details = _errors__WEBPACK_IMPORTED_MODULE_0__.ErrorDetails.KEY_LOAD_ERROR;
    }
    return new _fragment_loader__WEBPACK_IMPORTED_MODULE_1__.LoadError({
      type: _errors__WEBPACK_IMPORTED_MODULE_0__.ErrorTypes.NETWORK_ERROR,
      details: details,
      fatal: false,
      frag: frag,
      networkDetails: networkDetails
    });
  };
  _proto.loadClear = function loadClear(loadingFrag, encryptedFragments) {
    var _this = this;
    if (this.emeController && this.config.emeEnabled) {
      // access key-system with nearest key on start (loaidng frag is unencrypted)
      var sn = loadingFrag.sn,
        cc = loadingFrag.cc;
      var _loop = function _loop(i) {
        var frag = encryptedFragments[i];
        if (cc <= frag.cc && (sn === 'initSegment' || sn < frag.sn)) {
          _this.emeController.selectKeySystemFormat(frag).then(function (keySystemFormat) {
            frag.setKeyFormat(keySystemFormat);
          });
          return "break";
        }
      };
      for (var i = 0; i < encryptedFragments.length; i++) {
        var _ret = _loop(i);
        if (_ret === "break") break;
      }
    }
  };
  _proto.load = function load(frag) {
    var _this2 = this;
    if (!frag.decryptdata && frag.encrypted && this.emeController) {
      // Multiple keys, but none selected, resolve in eme-controller
      return this.emeController.selectKeySystemFormat(frag).then(function (keySystemFormat) {
        return _this2.loadInternal(frag, keySystemFormat);
      });
    }
    return this.loadInternal(frag);
  };
  _proto.loadInternal = function loadInternal(frag, keySystemFormat) {
    var _keyInfo, _keyInfo2;
    if (keySystemFormat) {
      frag.setKeyFormat(keySystemFormat);
    }
    var decryptdata = frag.decryptdata;
    if (!decryptdata) {
      var errorMessage = keySystemFormat ? "Expected frag.decryptdata to be defined after setting format " + keySystemFormat : 'Missing decryption data on fragment in onKeyLoading';
      return Promise.reject(this.createKeyLoadError(frag, _errors__WEBPACK_IMPORTED_MODULE_0__.ErrorDetails.KEY_LOAD_ERROR, null, errorMessage));
    }
    var uri = decryptdata.uri;
    if (!uri) {
      return Promise.reject(this.createKeyLoadError(frag, _errors__WEBPACK_IMPORTED_MODULE_0__.ErrorDetails.KEY_LOAD_ERROR, null, "Invalid key URI: \"" + uri + "\""));
    }
    var keyInfo = this.keyUriToKeyInfo[uri];
    if ((_keyInfo = keyInfo) !== null && _keyInfo !== void 0 && _keyInfo.decryptdata.key) {
      decryptdata.key = keyInfo.decryptdata.key;
      return Promise.resolve({
        frag: frag,
        keyInfo: keyInfo
      });
    }
    // Return key load promise as long as it does not have a mediakey session with an unusable key status
    if ((_keyInfo2 = keyInfo) !== null && _keyInfo2 !== void 0 && _keyInfo2.keyLoadPromise) {
      var _keyInfo$mediaKeySess;
      switch ((_keyInfo$mediaKeySess = keyInfo.mediaKeySessionContext) === null || _keyInfo$mediaKeySess === void 0 ? void 0 : _keyInfo$mediaKeySess.keyStatus) {
        case undefined:
        case 'status-pending':
        case 'usable':
        case 'usable-in-future':
          return keyInfo.keyLoadPromise.then(function (keyLoadedData) {
            // Return the correct fragment with updated decryptdata key and loaded keyInfo
            decryptdata.key = keyLoadedData.keyInfo.decryptdata.key;
            return {
              frag: frag,
              keyInfo: keyInfo
            };
          });
      }
      // If we have a key session and status and it is not pending or usable, continue
      // This will go back to the eme-controller for expired keys to get a new keyLoadPromise
    }

    // Load the key or return the loading promise
    keyInfo = this.keyUriToKeyInfo[uri] = {
      decryptdata: decryptdata,
      keyLoadPromise: null,
      loader: null,
      mediaKeySessionContext: null
    };
    switch (decryptdata.method) {
      case 'ISO-23001-7':
      case 'SAMPLE-AES':
      case 'SAMPLE-AES-CENC':
      case 'SAMPLE-AES-CTR':
        if (decryptdata.keyFormat === 'identity') {
          // loadKeyHTTP handles http(s) and data URLs
          return this.loadKeyHTTP(keyInfo, frag);
        }
        return this.loadKeyEME(keyInfo, frag);
      case 'AES-128':
        return this.loadKeyHTTP(keyInfo, frag);
      default:
        return Promise.reject(this.createKeyLoadError(frag, _errors__WEBPACK_IMPORTED_MODULE_0__.ErrorDetails.KEY_LOAD_ERROR, null, "Key supplied with unsupported METHOD: \"" + decryptdata.method + "\""));
    }
  };
  _proto.loadKeyEME = function loadKeyEME(keyInfo, frag) {
    var keyLoadedData = {
      frag: frag,
      keyInfo: keyInfo
    };
    if (this.emeController && this.config.emeEnabled) {
      var keySessionContextPromise = this.emeController.loadKey(keyLoadedData);
      if (keySessionContextPromise) {
        return (keyInfo.keyLoadPromise = keySessionContextPromise.then(function (keySessionContext) {
          keyInfo.mediaKeySessionContext = keySessionContext;
          return keyLoadedData;
        })).catch(function (error) {
          // Remove promise for license renewal or retry
          keyInfo.keyLoadPromise = null;
          throw error;
        });
      }
    }
    return Promise.resolve(keyLoadedData);
  };
  _proto.loadKeyHTTP = function loadKeyHTTP(keyInfo, frag) {
    var _this3 = this;
    var config = this.config;
    var Loader = config.loader;
    var keyLoader = new Loader(config);
    frag.keyLoader = keyInfo.loader = keyLoader;
    return keyInfo.keyLoadPromise = new Promise(function (resolve, reject) {
      var loaderContext = {
        keyInfo: keyInfo,
        frag: frag,
        responseType: 'arraybuffer',
        url: keyInfo.decryptdata.uri
      };

      // maxRetry is 0 so that instead of retrying the same key on the same variant multiple times,
      // key-loader will trigger an error and rely on stream-controller to handle retry logic.
      // this will also align retry logic with fragment-loader
      var loaderConfig = {
        timeout: config.fragLoadingTimeOut,
        maxRetry: 0,
        retryDelay: config.fragLoadingRetryDelay,
        maxRetryDelay: config.fragLoadingMaxRetryTimeout,
        highWaterMark: 0
      };
      var loaderCallbacks = {
        onSuccess: function onSuccess(response, stats, context, networkDetails) {
          var frag = context.frag,
            keyInfo = context.keyInfo,
            uri = context.url;
          if (!frag.decryptdata || keyInfo !== _this3.keyUriToKeyInfo[uri]) {
            return reject(_this3.createKeyLoadError(frag, _errors__WEBPACK_IMPORTED_MODULE_0__.ErrorDetails.KEY_LOAD_ERROR, networkDetails, 'after key load, decryptdata unset or changed'));
          }
          keyInfo.decryptdata.key = frag.decryptdata.key = new Uint8Array(response.data);

          // detach fragment key loader on load success
          frag.keyLoader = null;
          keyInfo.loader = null;
          resolve({
            frag: frag,
            keyInfo: keyInfo
          });
        },
        onError: function onError(error, context, networkDetails) {
          _this3.resetLoader(context);
          reject(_this3.createKeyLoadError(frag, _errors__WEBPACK_IMPORTED_MODULE_0__.ErrorDetails.KEY_LOAD_ERROR, networkDetails));
        },
        onTimeout: function onTimeout(stats, context, networkDetails) {
          _this3.resetLoader(context);
          reject(_this3.createKeyLoadError(frag, _errors__WEBPACK_IMPORTED_MODULE_0__.ErrorDetails.KEY_LOAD_TIMEOUT, networkDetails));
        },
        onAbort: function onAbort(stats, context, networkDetails) {
          _this3.resetLoader(context);
          reject(_this3.createKeyLoadError(frag, _errors__WEBPACK_IMPORTED_MODULE_0__.ErrorDetails.INTERNAL_ABORTED, networkDetails));
        }
      };
      keyLoader.load(loaderContext, loaderConfig, loaderCallbacks);
    });
  };
  _proto.resetLoader = function resetLoader(context) {
    var frag = context.frag,
      keyInfo = context.keyInfo,
      uri = context.url;
    var loader = keyInfo.loader;
    if (frag.keyLoader === loader) {
      frag.keyLoader = null;
      keyInfo.loader = null;
    }
    delete this.keyUriToKeyInfo[uri];
    if (loader) {
      loader.destroy();
    }
  };
  return KeyLoader;
}();


/***/ }),

/***/ "./src/loader/level-details.ts":
/*!*************************************!*\
  !*** ./src/loader/level-details.ts ***!
  \*************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "LevelDetails": () => (/* binding */ LevelDetails)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
var DEFAULT_TARGET_DURATION = 10;
var LevelDetails = /*#__PURE__*/function () {
  // Manifest reload synchronization

  function LevelDetails(baseUrl) {
    this.PTSKnown = false;
    this.alignedSliding = false;
    this.averagetargetduration = void 0;
    this.endCC = 0;
    this.endSN = 0;
    this.fragments = void 0;
    this.fragmentHint = void 0;
    this.partList = null;
    this.dateRanges = void 0;
    this.live = true;
    this.ageHeader = 0;
    this.advancedDateTime = void 0;
    this.updated = true;
    this.advanced = true;
    this.availabilityDelay = void 0;
    this.misses = 0;
    this.startCC = 0;
    this.startSN = 0;
    this.startTimeOffset = null;
    this.targetduration = 0;
    this.totalduration = 0;
    this.type = null;
    this.url = void 0;
    this.m3u8 = '';
    this.version = null;
    this.canBlockReload = false;
    this.canSkipUntil = 0;
    this.canSkipDateRanges = false;
    this.skippedSegments = 0;
    this.recentlyRemovedDateranges = void 0;
    this.partHoldBack = 0;
    this.holdBack = 0;
    this.partTarget = 0;
    this.preloadHint = void 0;
    this.renditionReports = void 0;
    this.tuneInGoal = 0;
    this.deltaUpdateFailed = void 0;
    this.driftStartTime = 0;
    this.driftEndTime = 0;
    this.driftStart = 0;
    this.driftEnd = 0;
    this.encryptedFragments = void 0;
    this.fragments = [];
    this.encryptedFragments = [];
    this.dateRanges = {};
    this.url = baseUrl;
  }
  var _proto = LevelDetails.prototype;
  _proto.reloaded = function reloaded(previous) {
    if (!previous) {
      this.advanced = true;
      this.updated = true;
      return;
    }
    var partSnDiff = this.lastPartSn - previous.lastPartSn;
    var partIndexDiff = this.lastPartIndex - previous.lastPartIndex;
    this.updated = this.endSN !== previous.endSN || !!partIndexDiff || !!partSnDiff;
    this.advanced = this.endSN > previous.endSN || partSnDiff > 0 || partSnDiff === 0 && partIndexDiff > 0;
    if (this.updated || this.advanced) {
      this.misses = Math.floor(previous.misses * 0.6);
    } else {
      this.misses = previous.misses + 1;
    }
    this.availabilityDelay = previous.availabilityDelay;
  };
  _createClass(LevelDetails, [{
    key: "hasProgramDateTime",
    get: function get() {
      if (this.fragments.length) {
        return (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(this.fragments[this.fragments.length - 1].programDateTime);
      }
      return false;
    }
  }, {
    key: "levelTargetDuration",
    get: function get() {
      return this.averagetargetduration || this.targetduration || DEFAULT_TARGET_DURATION;
    }
  }, {
    key: "drift",
    get: function get() {
      var runTime = this.driftEndTime - this.driftStartTime;
      if (runTime > 0) {
        var runDuration = this.driftEnd - this.driftStart;
        return runDuration * 1000 / runTime;
      }
      return 1;
    }
  }, {
    key: "edge",
    get: function get() {
      return this.partEnd || this.fragmentEnd;
    }
  }, {
    key: "partEnd",
    get: function get() {
      var _this$partList;
      if ((_this$partList = this.partList) !== null && _this$partList !== void 0 && _this$partList.length) {
        return this.partList[this.partList.length - 1].end;
      }
      return this.fragmentEnd;
    }
  }, {
    key: "fragmentEnd",
    get: function get() {
      var _this$fragments;
      if ((_this$fragments = this.fragments) !== null && _this$fragments !== void 0 && _this$fragments.length) {
        return this.fragments[this.fragments.length - 1].end;
      }
      return 0;
    }
  }, {
    key: "age",
    get: function get() {
      if (this.advancedDateTime) {
        return Math.max(Date.now() - this.advancedDateTime, 0) / 1000;
      }
      return 0;
    }
  }, {
    key: "lastPartIndex",
    get: function get() {
      var _this$partList2;
      if ((_this$partList2 = this.partList) !== null && _this$partList2 !== void 0 && _this$partList2.length) {
        return this.partList[this.partList.length - 1].index;
      }
      return -1;
    }
  }, {
    key: "lastPartSn",
    get: function get() {
      var _this$partList3;
      if ((_this$partList3 = this.partList) !== null && _this$partList3 !== void 0 && _this$partList3.length) {
        return this.partList[this.partList.length - 1].fragment.sn;
      }
      return this.endSN;
    }
  }]);
  return LevelDetails;
}();

/***/ }),

/***/ "./src/loader/level-key.ts":
/*!*********************************!*\
  !*** ./src/loader/level-key.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "LevelKey": () => (/* binding */ LevelKey)
/* harmony export */ });
/* harmony import */ var _utils_keysystem_util__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../utils/keysystem-util */ "./src/utils/keysystem-util.ts");
/* harmony import */ var _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../utils/mediakeys-helper */ "./src/utils/mediakeys-helper.ts");
/* harmony import */ var _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/mp4-tools */ "./src/utils/mp4-tools.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _utils_numeric_encoding_utils__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../utils/numeric-encoding-utils */ "./src/utils/numeric-encoding-utils.ts");





var keyUriToKeyIdMap = {};
var LevelKey = /*#__PURE__*/function () {
  LevelKey.clearKeyUriToKeyIdMap = function clearKeyUriToKeyIdMap() {
    keyUriToKeyIdMap = {};
  };
  function LevelKey(method, uri, format, formatversions, iv) {
    if (formatversions === void 0) {
      formatversions = [1];
    }
    if (iv === void 0) {
      iv = null;
    }
    this.uri = void 0;
    this.method = void 0;
    this.keyFormat = void 0;
    this.keyFormatVersions = void 0;
    this.encrypted = void 0;
    this.isCommonEncryption = void 0;
    this.iv = null;
    this.key = null;
    this.keyId = null;
    this.pssh = null;
    this.method = method;
    this.uri = uri;
    this.keyFormat = format;
    this.keyFormatVersions = formatversions;
    this.iv = iv;
    this.encrypted = method ? method !== 'NONE' : false;
    this.isCommonEncryption = this.encrypted && method !== 'AES-128';
  }
  var _proto = LevelKey.prototype;
  _proto.isSupported = function isSupported() {
    // If it's Segment encryption or No encryption, just select that key system
    if (this.method) {
      if (this.method === 'AES-128' || this.method === 'NONE') {
        return true;
      }
      switch (this.keyFormat) {
        case 'identity':
          // Maintain support for clear SAMPLE-AES with MPEG-3 TS
          return this.method === 'SAMPLE-AES';
        case _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_1__.KeySystemFormats.FAIRPLAY:
        case _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_1__.KeySystemFormats.WIDEVINE:
        case _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_1__.KeySystemFormats.PLAYREADY:
        case _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_1__.KeySystemFormats.CLEARKEY:
          return ['ISO-23001-7', 'SAMPLE-AES', 'SAMPLE-AES-CENC', 'SAMPLE-AES-CTR'].indexOf(this.method) !== -1;
      }
    }
    return false;
  };
  _proto.getDecryptData = function getDecryptData(sn) {
    if (!this.encrypted || !this.uri) {
      return null;
    }
    if (this.method === 'AES-128' && this.uri && !this.iv) {
      if (typeof sn !== 'number') {
        // We are fetching decryption data for a initialization segment
        // If the segment was encrypted with AES-128
        // It must have an IV defined. We cannot substitute the Segment Number in.
        if (this.method === 'AES-128' && !this.iv) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn("missing IV for initialization segment with method=\"" + this.method + "\" - compliance issue");
        }
        // Explicitly set sn to resulting value from implicit conversions 'initSegment' values for IV generation.
        sn = 0;
      }
      var iv = createInitializationVector(sn);
      var decryptdata = new LevelKey(this.method, this.uri, 'identity', this.keyFormatVersions, iv);
      return decryptdata;
    }

    // Initialize keyId if possible
    var keyBytes = (0,_utils_keysystem_util__WEBPACK_IMPORTED_MODULE_0__.convertDataUriToArrayBytes)(this.uri);
    if (keyBytes) {
      switch (this.keyFormat) {
        case _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_1__.KeySystemFormats.WIDEVINE:
          this.pssh = keyBytes;
          // In case of widevine keyID is embedded in PSSH box. Read Key ID.
          if (keyBytes.length >= 22) {
            this.keyId = keyBytes.subarray(keyBytes.length - 22, keyBytes.length - 6);
          }
          break;
        case _utils_mediakeys_helper__WEBPACK_IMPORTED_MODULE_1__.KeySystemFormats.PLAYREADY:
          {
            var PlayReadyKeySystemUUID = new Uint8Array([0x9a, 0x04, 0xf0, 0x79, 0x98, 0x40, 0x42, 0x86, 0xab, 0x92, 0xe6, 0x5b, 0xe0, 0x88, 0x5f, 0x95]);
            this.pssh = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.mp4pssh)(PlayReadyKeySystemUUID, null, keyBytes);
            var keyBytesUtf16 = new Uint16Array(keyBytes.buffer, keyBytes.byteOffset, keyBytes.byteLength / 2);
            var keyByteStr = String.fromCharCode.apply(null, Array.from(keyBytesUtf16));

            // Parse Playready WRMHeader XML
            var xmlKeyBytes = keyByteStr.substring(keyByteStr.indexOf('<'), keyByteStr.length);
            var parser = new DOMParser();
            var xmlDoc = parser.parseFromString(xmlKeyBytes, 'text/xml');
            var keyData = xmlDoc.getElementsByTagName('KID')[0];
            if (keyData) {
              var keyId = keyData.childNodes[0] ? keyData.childNodes[0].nodeValue : keyData.getAttribute('VALUE');
              if (keyId) {
                var keyIdArray = (0,_utils_numeric_encoding_utils__WEBPACK_IMPORTED_MODULE_4__.base64Decode)(keyId).subarray(0, 16);
                // KID value in PRO is a base64-encoded little endian GUID interpretation of UUID
                // KID value in ‘tenc’ is a big endian UUID GUID interpretation of UUID
                (0,_utils_keysystem_util__WEBPACK_IMPORTED_MODULE_0__.changeEndianness)(keyIdArray);
                this.keyId = keyIdArray;
              }
            }
            break;
          }
        default:
          {
            var keydata = keyBytes.subarray(0, 16);
            if (keydata.length !== 16) {
              var padded = new Uint8Array(16);
              padded.set(keydata, 16 - keydata.length);
              keydata = padded;
            }
            this.keyId = keydata;
            break;
          }
      }
    }

    // Default behavior: assign a new keyId for each uri
    if (!this.keyId || this.keyId.byteLength !== 16) {
      var _keyId = keyUriToKeyIdMap[this.uri];
      if (!_keyId) {
        var val = Object.keys(keyUriToKeyIdMap).length % Number.MAX_SAFE_INTEGER;
        _keyId = new Uint8Array(16);
        var dv = new DataView(_keyId.buffer, 12, 4); // Just set the last 4 bytes
        dv.setUint32(0, val);
        keyUriToKeyIdMap[this.uri] = _keyId;
      }
      this.keyId = _keyId;
    }
    return this;
  };
  return LevelKey;
}();
function createInitializationVector(segmentNumber) {
  var uint8View = new Uint8Array(16);
  for (var i = 12; i < 16; i++) {
    uint8View[i] = segmentNumber >> 8 * (15 - i) & 0xff;
  }
  return uint8View;
}

/***/ }),

/***/ "./src/loader/load-stats.ts":
/*!**********************************!*\
  !*** ./src/loader/load-stats.ts ***!
  \**********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "LoadStats": () => (/* binding */ LoadStats)
/* harmony export */ });
var LoadStats = function LoadStats() {
  this.aborted = false;
  this.loaded = 0;
  this.retry = 0;
  this.total = 0;
  this.chunkCount = 0;
  this.bwEstimate = 0;
  this.loading = {
    start: 0,
    first: 0,
    end: 0
  };
  this.parsing = {
    start: 0,
    end: 0
  };
  this.buffering = {
    start: 0,
    first: 0,
    end: 0
  };
};

/***/ }),

/***/ "./src/loader/m3u8-parser.ts":
/*!***********************************!*\
  !*** ./src/loader/m3u8-parser.ts ***!
  \***********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ M3U8Parser)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var url_toolkit__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! url-toolkit */ "./node_modules/url-toolkit/src/url-toolkit.js");
/* harmony import */ var url_toolkit__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(url_toolkit__WEBPACK_IMPORTED_MODULE_1__);
/* harmony import */ var _date_range__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./date-range */ "./src/loader/date-range.ts");
/* harmony import */ var _fragment__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ./fragment */ "./src/loader/fragment.ts");
/* harmony import */ var _level_details__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ./level-details */ "./src/loader/level-details.ts");
/* harmony import */ var _level_key__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ./level-key */ "./src/loader/level-key.ts");
/* harmony import */ var _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../utils/attr-list */ "./src/utils/attr-list.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _utils_codecs__WEBPACK_IMPORTED_MODULE_8__ = __webpack_require__(/*! ../utils/codecs */ "./src/utils/codecs.ts");




function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }








// https://regex101.com is your friend
var MASTER_PLAYLIST_REGEX = /#EXT-X-STREAM-INF:([^\r\n]*)(?:[\r\n](?:#[^\r\n]*)?)*([^\r\n]+)|#EXT-X-SESSION-DATA:([^\r\n]*)[\r\n]+|#EXT-X-SESSION-KEY:([^\n\r]*)[\r\n]+/g;
var MASTER_PLAYLIST_MEDIA_REGEX = /#EXT-X-MEDIA:(.*)/g;
var LEVEL_PLAYLIST_REGEX_FAST = new RegExp([/#EXTINF:\s*(\d*(?:\.\d+)?)(?:,(.*)\s+)?/.source,
// duration (#EXTINF:<duration>,<title>), group 1 => duration, group 2 => title
/(?!#) *(\S[\S ]*)/.source,
// segment URI, group 3 => the URI (note newline is not eaten)
/#EXT-X-BYTERANGE:*(.+)/.source,
// next segment's byterange, group 4 => range spec (x@y)
/#EXT-X-PROGRAM-DATE-TIME:(.+)/.source,
// next segment's program date/time group 5 => the datetime spec
/#.*/.source // All other non-segment oriented tags will match with all groups empty
].join('|'), 'g');
var LEVEL_PLAYLIST_REGEX_SLOW = new RegExp([/#(EXTM3U)/.source, /#EXT-X-(DATERANGE|KEY|MAP|PART|PART-INF|PLAYLIST-TYPE|PRELOAD-HINT|RENDITION-REPORT|SERVER-CONTROL|SKIP|START):(.+)/.source, /#EXT-X-(BITRATE|DISCONTINUITY-SEQUENCE|MEDIA-SEQUENCE|TARGETDURATION|VERSION): *(\d+)/.source, /#EXT-X-(DISCONTINUITY|ENDLIST|GAP)/.source, /(#)([^:]*):(.*)/.source, /(#)(.*)(?:.*)\r?\n?/.source].join('|'));
var M3U8Parser = /*#__PURE__*/function () {
  function M3U8Parser() {}
  M3U8Parser.findGroup = function findGroup(groups, mediaGroupId) {
    for (var i = 0; i < groups.length; i++) {
      var group = groups[i];
      if (group.id === mediaGroupId) {
        return group;
      }
    }
  };
  M3U8Parser.convertAVC1ToAVCOTI = function convertAVC1ToAVCOTI(codec) {
    // Convert avc1 codec string from RFC-4281 to RFC-6381 for MediaSource.isTypeSupported
    var avcdata = codec.split('.');
    if (avcdata.length > 2) {
      var result = avcdata.shift() + '.';
      result += parseInt(avcdata.shift()).toString(16);
      result += ('000' + parseInt(avcdata.shift()).toString(16)).slice(-4);
      return result;
    }
    return codec;
  };
  M3U8Parser.resolve = function resolve(url, baseUrl) {
    return (0,url_toolkit__WEBPACK_IMPORTED_MODULE_1__.buildAbsoluteURL)(baseUrl, url, {
      alwaysNormalize: true
    });
  };
  M3U8Parser.parseMasterPlaylist = function parseMasterPlaylist(string, baseurl) {
    var levels = [];
    var levelsWithKnownCodecs = [];
    var sessionData = {};
    var sessionKeys = [];
    var hasSessionData = false;
    MASTER_PLAYLIST_REGEX.lastIndex = 0;
    var result;
    while ((result = MASTER_PLAYLIST_REGEX.exec(string)) != null) {
      if (result[1]) {
        var _level$unknownCodecs;
        // '#EXT-X-STREAM-INF' is found, parse level tag  in group 1
        var attrs = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(result[1]);
        var level = {
          attrs: attrs,
          bitrate: attrs.decimalInteger('AVERAGE-BANDWIDTH') || attrs.decimalInteger('BANDWIDTH'),
          name: attrs.NAME,
          url: M3U8Parser.resolve(result[2], baseurl)
        };
        var resolution = attrs.decimalResolution('RESOLUTION');
        if (resolution) {
          level.width = resolution.width;
          level.height = resolution.height;
        }
        setCodecs((attrs.CODECS || '').split(/[ ,]+/).filter(function (c) {
          return c;
        }), level);
        if (level.videoCodec && level.videoCodec.indexOf('avc1') !== -1) {
          level.videoCodec = M3U8Parser.convertAVC1ToAVCOTI(level.videoCodec);
        }
        if (!((_level$unknownCodecs = level.unknownCodecs) !== null && _level$unknownCodecs !== void 0 && _level$unknownCodecs.length)) {
          levelsWithKnownCodecs.push(level);
        }
        levels.push(level);
      } else if (result[3]) {
        // '#EXT-X-SESSION-DATA' is found, parse session data in group 3
        var sessionAttrs = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(result[3]);
        if (sessionAttrs['DATA-ID']) {
          hasSessionData = true;
          sessionData[sessionAttrs['DATA-ID']] = sessionAttrs;
        }
      } else if (result[4]) {
        // '#EXT-X-SESSION-KEY' is found
        var keyTag = result[4];
        var sessionKey = parseKey(keyTag, baseurl);
        if (sessionKey.encrypted && sessionKey.isSupported()) {
          sessionKeys.push(sessionKey);
        } else {
          _utils_logger__WEBPACK_IMPORTED_MODULE_7__.logger.warn("[Keys] Ignoring invalid EXT-X-SESSION-KEY tag: \"" + keyTag + "\"");
        }
      }
    }
    // Filter out levels with unknown codecs if it does not remove all levels
    var stripUnknownCodecLevels = levelsWithKnownCodecs.length > 0 && levelsWithKnownCodecs.length < levels.length;
    return {
      levels: stripUnknownCodecLevels ? levelsWithKnownCodecs : levels,
      sessionData: hasSessionData ? sessionData : null,
      sessionKeys: sessionKeys.length ? sessionKeys : null
    };
  };
  M3U8Parser.parseMasterPlaylistMedia = function parseMasterPlaylistMedia(string, baseurl, type, groups) {
    if (groups === void 0) {
      groups = [];
    }
    var result;
    var medias = [];
    var id = 0;
    MASTER_PLAYLIST_MEDIA_REGEX.lastIndex = 0;
    while ((result = MASTER_PLAYLIST_MEDIA_REGEX.exec(string)) !== null) {
      var attrs = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(result[1]);
      if (attrs.TYPE === type) {
        var media = {
          attrs: attrs,
          bitrate: 0,
          id: id++,
          groupId: attrs['GROUP-ID'],
          instreamId: attrs['INSTREAM-ID'],
          name: attrs.NAME || attrs.LANGUAGE || '',
          type: type,
          default: attrs.bool('DEFAULT'),
          autoselect: attrs.bool('AUTOSELECT'),
          forced: attrs.bool('FORCED'),
          lang: attrs.LANGUAGE,
          url: attrs.URI ? M3U8Parser.resolve(attrs.URI, baseurl) : ''
        };
        if (groups.length) {
          // If there are audio or text groups signalled in the manifest, let's look for a matching codec string for this track
          // If we don't find the track signalled, lets use the first audio groups codec we have
          // Acting as a best guess
          var groupCodec = M3U8Parser.findGroup(groups, media.groupId) || groups[0];
          assignCodec(media, groupCodec, 'audioCodec');
          assignCodec(media, groupCodec, 'textCodec');
        }
        medias.push(media);
      }
    }
    return medias;
  };
  M3U8Parser.parseLevelPlaylist = function parseLevelPlaylist(string, baseurl, id, type, levelUrlId) {
    var level = new _level_details__WEBPACK_IMPORTED_MODULE_4__.LevelDetails(baseurl);
    var fragments = level.fragments;
    // The most recent init segment seen (applies to all subsequent segments)
    var currentInitSegment = null;
    var currentSN = 0;
    var currentPart = 0;
    var totalduration = 0;
    var discontinuityCounter = 0;
    var prevFrag = null;
    var frag = new _fragment__WEBPACK_IMPORTED_MODULE_3__.Fragment(type, baseurl);
    var result;
    var i;
    var levelkeys;
    var firstPdtIndex = -1;
    var createNextFrag = false;
    LEVEL_PLAYLIST_REGEX_FAST.lastIndex = 0;
    level.m3u8 = string;
    while ((result = LEVEL_PLAYLIST_REGEX_FAST.exec(string)) !== null) {
      if (createNextFrag) {
        createNextFrag = false;
        frag = new _fragment__WEBPACK_IMPORTED_MODULE_3__.Fragment(type, baseurl);
        // setup the next fragment for part loading
        frag.start = totalduration;
        frag.sn = currentSN;
        frag.cc = discontinuityCounter;
        frag.level = id;
        if (currentInitSegment) {
          frag.initSegment = currentInitSegment;
          frag.rawProgramDateTime = currentInitSegment.rawProgramDateTime;
          currentInitSegment.rawProgramDateTime = null;
        }
      }
      var duration = result[1];
      if (duration) {
        // INF
        frag.duration = parseFloat(duration);
        // avoid sliced strings    https://github.com/video-dev/hls.js/issues/939
        var title = (' ' + result[2]).slice(1);
        frag.title = title || null;
        frag.tagList.push(title ? ['INF', duration, title] : ['INF', duration]);
      } else if (result[3]) {
        // url
        if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(frag.duration)) {
          frag.start = totalduration;
          if (levelkeys) {
            setFragLevelKeys(frag, levelkeys, level);
          }
          frag.sn = currentSN;
          frag.level = id;
          frag.cc = discontinuityCounter;
          frag.urlId = levelUrlId;
          fragments.push(frag);
          // avoid sliced strings    https://github.com/video-dev/hls.js/issues/939
          frag.relurl = (' ' + result[3]).slice(1);
          assignProgramDateTime(frag, prevFrag);
          prevFrag = frag;
          totalduration += frag.duration;
          currentSN++;
          currentPart = 0;
          createNextFrag = true;
        }
      } else if (result[4]) {
        // X-BYTERANGE
        var data = (' ' + result[4]).slice(1);
        if (prevFrag) {
          frag.setByteRange(data, prevFrag);
        } else {
          frag.setByteRange(data);
        }
      } else if (result[5]) {
        // PROGRAM-DATE-TIME
        // avoid sliced strings    https://github.com/video-dev/hls.js/issues/939
        frag.rawProgramDateTime = (' ' + result[5]).slice(1);
        frag.tagList.push(['PROGRAM-DATE-TIME', frag.rawProgramDateTime]);
        if (firstPdtIndex === -1) {
          firstPdtIndex = fragments.length;
        }
      } else {
        result = result[0].match(LEVEL_PLAYLIST_REGEX_SLOW);
        if (!result) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_7__.logger.warn('No matches on slow regex match for level playlist!');
          continue;
        }
        for (i = 1; i < result.length; i++) {
          if (typeof result[i] !== 'undefined') {
            break;
          }
        }

        // avoid sliced strings    https://github.com/video-dev/hls.js/issues/939
        var tag = (' ' + result[i]).slice(1);
        var value1 = (' ' + result[i + 1]).slice(1);
        var value2 = result[i + 2] ? (' ' + result[i + 2]).slice(1) : '';
        switch (tag) {
          case 'PLAYLIST-TYPE':
            level.type = value1.toUpperCase();
            break;
          case 'MEDIA-SEQUENCE':
            currentSN = level.startSN = parseInt(value1);
            break;
          case 'SKIP':
            {
              var skipAttrs = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(value1);
              var skippedSegments = skipAttrs.decimalInteger('SKIPPED-SEGMENTS');
              if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(skippedSegments)) {
                level.skippedSegments = skippedSegments;
                // This will result in fragments[] containing undefined values, which we will fill in with `mergeDetails`
                for (var _i = skippedSegments; _i--;) {
                  fragments.unshift(null);
                }
                currentSN += skippedSegments;
              }
              var recentlyRemovedDateranges = skipAttrs.enumeratedString('RECENTLY-REMOVED-DATERANGES');
              if (recentlyRemovedDateranges) {
                level.recentlyRemovedDateranges = recentlyRemovedDateranges.split('\t');
              }
              break;
            }
          case 'TARGETDURATION':
            level.targetduration = parseFloat(value1);
            break;
          case 'VERSION':
            level.version = parseInt(value1);
            break;
          case 'EXTM3U':
            break;
          case 'ENDLIST':
            level.live = false;
            break;
          case '#':
            if (value1 || value2) {
              frag.tagList.push(value2 ? [value1, value2] : [value1]);
            }
            break;
          case 'DISCONTINUITY':
            discontinuityCounter++;
            frag.tagList.push(['DIS']);
            break;
          case 'GAP':
            frag.tagList.push([tag]);
            break;
          case 'BITRATE':
            frag.tagList.push([tag, value1]);
            break;
          case 'DATERANGE':
            {
              var dateRangeAttr = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(value1);
              var dateRange = new _date_range__WEBPACK_IMPORTED_MODULE_2__.DateRange(dateRangeAttr, level.dateRanges[dateRangeAttr.ID]);
              if (dateRange.isValid || level.skippedSegments) {
                level.dateRanges[dateRange.id] = dateRange;
              } else {
                _utils_logger__WEBPACK_IMPORTED_MODULE_7__.logger.warn("Ignoring invalid DATERANGE tag: \"" + value1 + "\"");
              }
              // Add to fragment tag list for backwards compatibility (< v1.2.0)
              frag.tagList.push(['EXT-X-DATERANGE', value1]);
              break;
            }
          case 'DISCONTINUITY-SEQUENCE':
            discontinuityCounter = parseInt(value1);
            break;
          case 'KEY':
            {
              var levelKey = parseKey(value1, baseurl);
              if (levelKey.isSupported()) {
                if (levelKey.method === 'NONE') {
                  levelkeys = undefined;
                  break;
                }
                if (!levelkeys) {
                  levelkeys = {};
                }
                if (levelkeys[levelKey.keyFormat]) {
                  levelkeys = _extends({}, levelkeys);
                }
                levelkeys[levelKey.keyFormat] = levelKey;
              } else {
                _utils_logger__WEBPACK_IMPORTED_MODULE_7__.logger.warn("[Keys] Ignoring invalid EXT-X-KEY tag: \"" + value1 + "\"");
              }
              break;
            }
          case 'START':
            {
              var startAttrs = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(value1);
              var startTimeOffset = startAttrs.decimalFloatingPoint('TIME-OFFSET');
              // TIME-OFFSET can be 0
              if ((0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(startTimeOffset)) {
                level.startTimeOffset = startTimeOffset;
              }
              break;
            }
          case 'MAP':
            {
              var mapAttrs = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(value1);
              if (frag.duration) {
                // Initial segment tag is after segment duration tag.
                //   #EXTINF: 6.0
                //   #EXT-X-MAP:URI="init.mp4
                var init = new _fragment__WEBPACK_IMPORTED_MODULE_3__.Fragment(type, baseurl);
                setInitSegment(init, mapAttrs, id, levelkeys);
                currentInitSegment = init;
                frag.initSegment = currentInitSegment;
                if (currentInitSegment.rawProgramDateTime && !frag.rawProgramDateTime) {
                  frag.rawProgramDateTime = currentInitSegment.rawProgramDateTime;
                }
              } else {
                // Initial segment tag is before segment duration tag
                setInitSegment(frag, mapAttrs, id, levelkeys);
                currentInitSegment = frag;
                createNextFrag = true;
              }
              break;
            }
          case 'SERVER-CONTROL':
            {
              var serverControlAttrs = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(value1);
              level.canBlockReload = serverControlAttrs.bool('CAN-BLOCK-RELOAD');
              level.canSkipUntil = serverControlAttrs.optionalFloat('CAN-SKIP-UNTIL', 0);
              level.canSkipDateRanges = level.canSkipUntil > 0 && serverControlAttrs.bool('CAN-SKIP-DATERANGES');
              level.partHoldBack = serverControlAttrs.optionalFloat('PART-HOLD-BACK', 0);
              level.holdBack = serverControlAttrs.optionalFloat('HOLD-BACK', 0);
              break;
            }
          case 'PART-INF':
            {
              var partInfAttrs = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(value1);
              level.partTarget = partInfAttrs.decimalFloatingPoint('PART-TARGET');
              break;
            }
          case 'PART':
            {
              var partList = level.partList;
              if (!partList) {
                partList = level.partList = [];
              }
              var previousFragmentPart = currentPart > 0 ? partList[partList.length - 1] : undefined;
              var index = currentPart++;
              var part = new _fragment__WEBPACK_IMPORTED_MODULE_3__.Part(new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(value1), frag, baseurl, index, previousFragmentPart);
              partList.push(part);
              frag.duration += part.duration;
              break;
            }
          case 'PRELOAD-HINT':
            {
              var preloadHintAttrs = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(value1);
              level.preloadHint = preloadHintAttrs;
              break;
            }
          case 'RENDITION-REPORT':
            {
              var renditionReportAttrs = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(value1);
              level.renditionReports = level.renditionReports || [];
              level.renditionReports.push(renditionReportAttrs);
              break;
            }
          default:
            _utils_logger__WEBPACK_IMPORTED_MODULE_7__.logger.warn("line parsed but not handled: " + result);
            break;
        }
      }
    }
    if (prevFrag && !prevFrag.relurl) {
      fragments.pop();
      totalduration -= prevFrag.duration;
      if (level.partList) {
        level.fragmentHint = prevFrag;
      }
    } else if (level.partList) {
      assignProgramDateTime(frag, prevFrag);
      frag.cc = discontinuityCounter;
      level.fragmentHint = frag;
      if (levelkeys) {
        setFragLevelKeys(frag, levelkeys, level);
      }
    }
    var fragmentLength = fragments.length;
    var firstFragment = fragments[0];
    var lastFragment = fragments[fragmentLength - 1];
    totalduration += level.skippedSegments * level.targetduration;
    if (totalduration > 0 && fragmentLength && lastFragment) {
      level.averagetargetduration = totalduration / fragmentLength;
      var lastSn = lastFragment.sn;
      level.endSN = lastSn !== 'initSegment' ? lastSn : 0;
      if (!level.live) {
        lastFragment.endList = true;
      }
      if (firstFragment) {
        level.startCC = firstFragment.cc;
      }
    } else {
      level.endSN = 0;
      level.startCC = 0;
    }
    if (level.fragmentHint) {
      totalduration += level.fragmentHint.duration;
    }
    level.totalduration = totalduration;
    level.endCC = discontinuityCounter;

    /**
     * Backfill any missing PDT values
     * "If the first EXT-X-PROGRAM-DATE-TIME tag in a Playlist appears after
     * one or more Media Segment URIs, the client SHOULD extrapolate
     * backward from that tag (using EXTINF durations and/or media
     * timestamps) to associate dates with those segments."
     * We have already extrapolated forward, but all fragments up to the first instance of PDT do not have their PDTs
     * computed.
     */
    if (firstPdtIndex > 0) {
      backfillProgramDateTimes(fragments, firstPdtIndex);
    }
    return level;
  };
  return M3U8Parser;
}();

function parseKey(keyTag, baseurl) {
  var _keyAttrs$enumeratedS, _keyAttrs$enumeratedS2;
  // https://tools.ietf.org/html/rfc8216#section-4.3.2.4
  var keyAttrs = new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList(keyTag);
  var decryptmethod = (_keyAttrs$enumeratedS = keyAttrs.enumeratedString('METHOD')) != null ? _keyAttrs$enumeratedS : '';
  var decrypturi = keyAttrs.URI;
  var decryptiv = keyAttrs.hexadecimalInteger('IV');
  var decryptkeyformatversions = keyAttrs.enumeratedString('KEYFORMATVERSIONS');
  // From RFC: This attribute is OPTIONAL; its absence indicates an implicit value of "identity".
  var decryptkeyformat = (_keyAttrs$enumeratedS2 = keyAttrs.enumeratedString('KEYFORMAT')) != null ? _keyAttrs$enumeratedS2 : 'identity';
  if (decrypturi && keyAttrs.IV && !decryptiv) {
    _utils_logger__WEBPACK_IMPORTED_MODULE_7__.logger.error("Invalid IV: " + keyAttrs.IV);
  }
  // If decrypturi is a URI with a scheme, then baseurl will be ignored
  // No uri is allowed when METHOD is NONE
  var resolvedUri = decrypturi ? M3U8Parser.resolve(decrypturi, baseurl) : '';
  var keyFormatVersions = (decryptkeyformatversions ? decryptkeyformatversions : '1').split('/').map(Number).filter(Number.isFinite);
  return new _level_key__WEBPACK_IMPORTED_MODULE_5__.LevelKey(decryptmethod, resolvedUri, decryptkeyformat, keyFormatVersions, decryptiv);
}
function setCodecs(codecs, level) {
  ['video', 'audio', 'text'].forEach(function (type) {
    var filtered = codecs.filter(function (codec) {
      return (0,_utils_codecs__WEBPACK_IMPORTED_MODULE_8__.isCodecType)(codec, type);
    });
    if (filtered.length) {
      var preferred = filtered.filter(function (codec) {
        return codec.lastIndexOf('avc1', 0) === 0 || codec.lastIndexOf('mp4a', 0) === 0;
      });
      level[type + "Codec"] = preferred.length > 0 ? preferred[0] : filtered[0];

      // remove from list
      codecs = codecs.filter(function (codec) {
        return filtered.indexOf(codec) === -1;
      });
    }
  });
  level.unknownCodecs = codecs;
}
function assignCodec(media, groupItem, codecProperty) {
  var codecValue = groupItem[codecProperty];
  if (codecValue) {
    media[codecProperty] = codecValue;
  }
}
function backfillProgramDateTimes(fragments, firstPdtIndex) {
  var fragPrev = fragments[firstPdtIndex];
  for (var i = firstPdtIndex; i--;) {
    var frag = fragments[i];
    // Exit on delta-playlist skipped segments
    if (!frag) {
      return;
    }
    frag.programDateTime = fragPrev.programDateTime - frag.duration * 1000;
    fragPrev = frag;
  }
}
function assignProgramDateTime(frag, prevFrag) {
  if (frag.rawProgramDateTime) {
    frag.programDateTime = Date.parse(frag.rawProgramDateTime);
  } else if (prevFrag !== null && prevFrag !== void 0 && prevFrag.programDateTime) {
    frag.programDateTime = prevFrag.endProgramDateTime;
  }
  if (!(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(frag.programDateTime)) {
    frag.programDateTime = null;
    frag.rawProgramDateTime = null;
  }
}
function setInitSegment(frag, mapAttrs, id, levelkeys) {
  frag.relurl = mapAttrs.URI;
  if (mapAttrs.BYTERANGE) {
    frag.setByteRange(mapAttrs.BYTERANGE);
  }
  frag.level = id;
  frag.sn = 'initSegment';
  if (levelkeys) {
    frag.levelkeys = levelkeys;
  }
  frag.initSegment = null;
}
function setFragLevelKeys(frag, levelkeys, level) {
  frag.levelkeys = levelkeys;
  var encryptedFragments = level.encryptedFragments;
  if ((!encryptedFragments.length || encryptedFragments[encryptedFragments.length - 1].levelkeys !== levelkeys) && Object.keys(levelkeys).some(function (format) {
    return levelkeys[format].isCommonEncryption;
  })) {
    encryptedFragments.push(frag);
  }
}

/***/ }),

/***/ "./src/loader/playlist-loader.ts":
/*!***************************************!*\
  !*** ./src/loader/playlist-loader.ts ***!
  \***************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _m3u8_parser__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ./m3u8-parser */ "./src/loader/m3u8-parser.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");
/* harmony import */ var _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../utils/attr-list */ "./src/utils/attr-list.ts");


/**
 * PlaylistLoader - delegate for media manifest/playlist loading tasks. Takes care of parsing media to internal data-models.
 *
 * Once loaded, dispatches events with parsed data-models of manifest/levels/audio/subtitle tracks.
 *
 * Uses loader(s) set in config to do actual internal loading of resource tasks.
 *
 * @module
 *
 */







function mapContextToLevelType(context) {
  var type = context.type;
  switch (type) {
    case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.AUDIO_TRACK:
      return _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistLevelType.AUDIO;
    case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.SUBTITLE_TRACK:
      return _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistLevelType.SUBTITLE;
    default:
      return _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistLevelType.MAIN;
  }
}
function getResponseUrl(response, context) {
  var url = response.url;
  // responseURL not supported on some browsers (it is used to detect URL redirection)
  // data-uri mode also not supported (but no need to detect redirection)
  if (url === undefined || url.indexOf('data:') === 0) {
    // fallback to initial URL
    url = context.url;
  }
  return url;
}
var PlaylistLoader = /*#__PURE__*/function () {
  function PlaylistLoader(hls) {
    this.hls = void 0;
    this.loaders = Object.create(null);
    this.hls = hls;
    this.registerListeners();
  }
  var _proto = PlaylistLoader.prototype;
  _proto.startLoad = function startLoad(startPosition) {};
  _proto.stopLoad = function stopLoad() {
    this.destroyInternalLoaders();
  };
  _proto.registerListeners = function registerListeners() {
    var hls = this.hls;
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_LOADING, this.onLevelLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.AUDIO_TRACK_LOADING, this.onAudioTrackLoading, this);
    hls.on(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_TRACK_LOADING, this.onSubtitleTrackLoading, this);
  };
  _proto.unregisterListeners = function unregisterListeners() {
    var hls = this.hls;
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADING, this.onManifestLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_LOADING, this.onLevelLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.AUDIO_TRACK_LOADING, this.onAudioTrackLoading, this);
    hls.off(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_TRACK_LOADING, this.onSubtitleTrackLoading, this);
  }

  /**
   * Returns defaults or configured loader-type overloads (pLoader and loader config params)
   */;
  _proto.createInternalLoader = function createInternalLoader(context) {
    var config = this.hls.config;
    var PLoader = config.pLoader;
    var Loader = config.loader;
    var InternalLoader = PLoader || Loader;
    var loader = new InternalLoader(config);
    context.loader = loader;
    this.loaders[context.type] = loader;
    return loader;
  };
  _proto.getInternalLoader = function getInternalLoader(context) {
    return this.loaders[context.type];
  };
  _proto.resetInternalLoader = function resetInternalLoader(contextType) {
    if (this.loaders[contextType]) {
      delete this.loaders[contextType];
    }
  }

  /**
   * Call `destroy` on all internal loader instances mapped (one per context type)
   */;
  _proto.destroyInternalLoaders = function destroyInternalLoaders() {
    for (var contextType in this.loaders) {
      var loader = this.loaders[contextType];
      if (loader) {
        loader.destroy();
      }
      this.resetInternalLoader(contextType);
    }
  };
  _proto.destroy = function destroy() {
    this.unregisterListeners();
    this.destroyInternalLoaders();
  };
  _proto.onManifestLoading = function onManifestLoading(event, data) {
    var url = data.url;
    this.load({
      id: null,
      groupId: null,
      level: 0,
      responseType: 'text',
      type: _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.MANIFEST,
      url: url,
      deliveryDirectives: null
    });
  };
  _proto.onLevelLoading = function onLevelLoading(event, data) {
    var id = data.id,
      level = data.level,
      url = data.url,
      deliveryDirectives = data.deliveryDirectives;
    this.load({
      id: id,
      groupId: null,
      level: level,
      responseType: 'text',
      type: _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.LEVEL,
      url: url,
      deliveryDirectives: deliveryDirectives
    });
  };
  _proto.onAudioTrackLoading = function onAudioTrackLoading(event, data) {
    var id = data.id,
      groupId = data.groupId,
      url = data.url,
      deliveryDirectives = data.deliveryDirectives;
    this.load({
      id: id,
      groupId: groupId,
      level: null,
      responseType: 'text',
      type: _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.AUDIO_TRACK,
      url: url,
      deliveryDirectives: deliveryDirectives
    });
  };
  _proto.onSubtitleTrackLoading = function onSubtitleTrackLoading(event, data) {
    var id = data.id,
      groupId = data.groupId,
      url = data.url,
      deliveryDirectives = data.deliveryDirectives;
    this.load({
      id: id,
      groupId: groupId,
      level: null,
      responseType: 'text',
      type: _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.SUBTITLE_TRACK,
      url: url,
      deliveryDirectives: deliveryDirectives
    });
  };
  _proto.load = function load(context) {
    var _context$deliveryDire;
    var config = this.hls.config;

    // logger.debug(`[playlist-loader]: Loading playlist of type ${context.type}, level: ${context.level}, id: ${context.id}`);

    // Check if a loader for this context already exists
    var loader = this.getInternalLoader(context);
    if (loader) {
      var loaderContext = loader.context;
      if (loaderContext && loaderContext.url === context.url) {
        // same URL can't overlap
        _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.trace('[playlist-loader]: playlist request ongoing');
        return;
      }
      _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.log("[playlist-loader]: aborting previous loader for type: " + context.type);
      loader.abort();
    }
    var maxRetry;
    var timeout;
    var retryDelay;
    var maxRetryDelay;

    // apply different configs for retries depending on
    // context (manifest, level, audio/subs playlist)
    switch (context.type) {
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.MANIFEST:
        maxRetry = config.manifestLoadingMaxRetry;
        timeout = config.manifestLoadingTimeOut;
        retryDelay = config.manifestLoadingRetryDelay;
        maxRetryDelay = config.manifestLoadingMaxRetryTimeout;
        break;
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.LEVEL:
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.AUDIO_TRACK:
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.SUBTITLE_TRACK:
        // Manage retries in Level/Track Controller
        maxRetry = 0;
        timeout = config.levelLoadingTimeOut;
        break;
      default:
        maxRetry = config.levelLoadingMaxRetry;
        timeout = config.levelLoadingTimeOut;
        retryDelay = config.levelLoadingRetryDelay;
        maxRetryDelay = config.levelLoadingMaxRetryTimeout;
        break;
    }
    loader = this.createInternalLoader(context);

    // Override level/track timeout for LL-HLS requests
    // (the default of 10000ms is counter productive to blocking playlist reload requests)
    if ((_context$deliveryDire = context.deliveryDirectives) !== null && _context$deliveryDire !== void 0 && _context$deliveryDire.part) {
      var levelDetails;
      if (context.type === _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.LEVEL && context.level !== null) {
        levelDetails = this.hls.levels[context.level].details;
      } else if (context.type === _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.AUDIO_TRACK && context.id !== null) {
        levelDetails = this.hls.audioTracks[context.id].details;
      } else if (context.type === _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.SUBTITLE_TRACK && context.id !== null) {
        levelDetails = this.hls.subtitleTracks[context.id].details;
      }
      if (levelDetails) {
        var partTarget = levelDetails.partTarget;
        var targetDuration = levelDetails.targetduration;
        if (partTarget && targetDuration) {
          timeout = Math.min(Math.max(partTarget * 3, targetDuration * 0.8) * 1000, timeout);
        }
      }
    }
    var loaderConfig = {
      timeout: timeout,
      maxRetry: maxRetry,
      retryDelay: retryDelay,
      maxRetryDelay: maxRetryDelay,
      highWaterMark: 0
    };
    var loaderCallbacks = {
      onSuccess: this.loadsuccess.bind(this),
      onError: this.loaderror.bind(this),
      onTimeout: this.loadtimeout.bind(this)
    };

    // logger.debug(`[playlist-loader]: Calling internal loader delegate for URL: ${context.url}`);

    loader.load(context, loaderConfig, loaderCallbacks);
  };
  _proto.loadsuccess = function loadsuccess(response, stats, context, networkDetails) {
    if (networkDetails === void 0) {
      networkDetails = null;
    }
    this.resetInternalLoader(context.type);
    var string = response.data;

    // Validate if it is an M3U8 at all
    if (string.indexOf('#EXTM3U') !== 0) {
      this.handleManifestParsingError(response, context, 'no EXTM3U delimiter', networkDetails);
      return;
    }
    stats.parsing.start = performance.now();
    // Check if chunk-list or master. handle empty chunk list case (first EXTINF not signaled, but TARGETDURATION present)
    if (string.indexOf('#EXTINF:') > 0 || string.indexOf('#EXT-X-TARGETDURATION:') > 0) {
      this.handleTrackOrLevelPlaylist(response, stats, context, networkDetails);
    } else {
      this.handleMasterPlaylist(response, stats, context, networkDetails);
    }
  };
  _proto.loaderror = function loaderror(response, context, networkDetails) {
    if (networkDetails === void 0) {
      networkDetails = null;
    }
    this.handleNetworkError(context, networkDetails, false, response);
  };
  _proto.loadtimeout = function loadtimeout(stats, context, networkDetails) {
    if (networkDetails === void 0) {
      networkDetails = null;
    }
    this.handleNetworkError(context, networkDetails, true);
  };
  _proto.handleMasterPlaylist = function handleMasterPlaylist(response, stats, context, networkDetails) {
    var hls = this.hls;
    var string = response.data;
    var url = getResponseUrl(response, context);
    var _M3U8Parser$parseMast = _m3u8_parser__WEBPACK_IMPORTED_MODULE_4__["default"].parseMasterPlaylist(string, url),
      levels = _M3U8Parser$parseMast.levels,
      sessionData = _M3U8Parser$parseMast.sessionData,
      sessionKeys = _M3U8Parser$parseMast.sessionKeys;
    if (!levels.length) {
      this.handleManifestParsingError(response, context, 'no level found in manifest', networkDetails);
      return;
    }

    // multi level playlist, parse level info
    var audioGroups = levels.map(function (level) {
      return {
        id: level.attrs.AUDIO,
        audioCodec: level.audioCodec
      };
    });
    var subtitleGroups = levels.map(function (level) {
      return {
        id: level.attrs.SUBTITLES,
        textCodec: level.textCodec
      };
    });
    var audioTracks = _m3u8_parser__WEBPACK_IMPORTED_MODULE_4__["default"].parseMasterPlaylistMedia(string, url, 'AUDIO', audioGroups);
    var subtitles = _m3u8_parser__WEBPACK_IMPORTED_MODULE_4__["default"].parseMasterPlaylistMedia(string, url, 'SUBTITLES', subtitleGroups);
    var captions = _m3u8_parser__WEBPACK_IMPORTED_MODULE_4__["default"].parseMasterPlaylistMedia(string, url, 'CLOSED-CAPTIONS');
    if (audioTracks.length) {
      // check if we have found an audio track embedded in main playlist (audio track without URI attribute)
      var embeddedAudioFound = audioTracks.some(function (audioTrack) {
        return !audioTrack.url;
      });

      // if no embedded audio track defined, but audio codec signaled in quality level,
      // we need to signal this main audio track this could happen with playlists with
      // alt audio rendition in which quality levels (main)
      // contains both audio+video. but with mixed audio track not signaled
      if (!embeddedAudioFound && levels[0].audioCodec && !levels[0].attrs.AUDIO) {
        _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.log('[playlist-loader]: audio codec signaled in quality level, but no embedded audio track signaled, create one');
        audioTracks.unshift({
          type: 'main',
          name: 'main',
          default: false,
          autoselect: false,
          forced: false,
          id: -1,
          attrs: new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList({}),
          bitrate: 0,
          url: ''
        });
      }
    }
    hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADED, {
      levels: levels,
      audioTracks: audioTracks,
      subtitles: subtitles,
      captions: captions,
      url: url,
      stats: stats,
      networkDetails: networkDetails,
      sessionData: sessionData,
      sessionKeys: sessionKeys
    });
  };
  _proto.handleTrackOrLevelPlaylist = function handleTrackOrLevelPlaylist(response, stats, context, networkDetails) {
    var hls = this.hls;
    var id = context.id,
      level = context.level,
      type = context.type;
    var url = getResponseUrl(response, context);
    var levelUrlId = (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(id) ? id : 0;
    var levelId = (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(level) ? level : levelUrlId;
    var levelType = mapContextToLevelType(context);
    var levelDetails = _m3u8_parser__WEBPACK_IMPORTED_MODULE_4__["default"].parseLevelPlaylist(response.data, url, levelId, levelType, levelUrlId);
    if (!levelDetails.fragments.length) {
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorTypes.NETWORK_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.LEVEL_EMPTY_ERROR,
        fatal: false,
        url: url,
        reason: 'no fragments found in level',
        level: typeof context.level === 'number' ? context.level : undefined
      });
      return;
    }

    // We have done our first request (Manifest-type) and receive
    // not a master playlist but a chunk-list (track/level)
    // We fire the manifest-loaded event anyway with the parsed level-details
    // by creating a single-level structure for it.
    if (type === _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.MANIFEST) {
      var singleLevel = {
        attrs: new _utils_attr_list__WEBPACK_IMPORTED_MODULE_6__.AttrList({}),
        bitrate: 0,
        details: levelDetails,
        name: '',
        url: url
      };
      hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.MANIFEST_LOADED, {
        levels: [singleLevel],
        audioTracks: [],
        url: url,
        stats: stats,
        networkDetails: networkDetails,
        sessionData: null,
        sessionKeys: null
      });
    }

    // save parsing time
    stats.parsing.end = performance.now();

    // extend the context with the new levelDetails property
    context.levelDetails = levelDetails;
    this.handlePlaylistLoaded(response, stats, context, networkDetails);
  };
  _proto.handleManifestParsingError = function handleManifestParsingError(response, context, reason, networkDetails) {
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, {
      type: _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorTypes.NETWORK_ERROR,
      details: _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.MANIFEST_PARSING_ERROR,
      fatal: context.type === _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.MANIFEST,
      url: response.url,
      reason: reason,
      response: response,
      context: context,
      networkDetails: networkDetails
    });
  };
  _proto.handleNetworkError = function handleNetworkError(context, networkDetails, timeout, response) {
    if (timeout === void 0) {
      timeout = false;
    }
    _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.warn("[playlist-loader]: A network " + (timeout ? 'timeout' : 'error') + " occurred while loading " + context.type + " level: " + context.level + " id: " + context.id + " group-id: \"" + context.groupId + "\"");
    var details = _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.UNKNOWN;
    var fatal = false;
    var loader = this.getInternalLoader(context);
    switch (context.type) {
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.MANIFEST:
        details = timeout ? _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.MANIFEST_LOAD_TIMEOUT : _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.MANIFEST_LOAD_ERROR;
        fatal = true;
        break;
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.LEVEL:
        details = timeout ? _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.LEVEL_LOAD_TIMEOUT : _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.LEVEL_LOAD_ERROR;
        fatal = false;
        break;
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.AUDIO_TRACK:
        details = timeout ? _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.AUDIO_TRACK_LOAD_TIMEOUT : _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.AUDIO_TRACK_LOAD_ERROR;
        fatal = false;
        break;
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.SUBTITLE_TRACK:
        details = timeout ? _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.SUBTITLE_TRACK_LOAD_TIMEOUT : _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorDetails.SUBTITLE_LOAD_ERROR;
        fatal = false;
        break;
    }
    if (loader) {
      this.resetInternalLoader(context.type);
    }
    var errorData = {
      type: _errors__WEBPACK_IMPORTED_MODULE_2__.ErrorTypes.NETWORK_ERROR,
      details: details,
      fatal: fatal,
      url: context.url,
      loader: loader,
      context: context,
      networkDetails: networkDetails
    };
    if (response) {
      errorData.response = response;
    }
    this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.ERROR, errorData);
  };
  _proto.handlePlaylistLoaded = function handlePlaylistLoaded(response, stats, context, networkDetails) {
    var type = context.type,
      level = context.level,
      id = context.id,
      groupId = context.groupId,
      loader = context.loader,
      levelDetails = context.levelDetails,
      deliveryDirectives = context.deliveryDirectives;
    if (!(levelDetails !== null && levelDetails !== void 0 && levelDetails.targetduration)) {
      this.handleManifestParsingError(response, context, 'invalid target duration', networkDetails);
      return;
    }
    if (!loader) {
      return;
    }
    if (levelDetails.live) {
      if (loader.getCacheAge) {
        levelDetails.ageHeader = loader.getCacheAge() || 0;
      }
      if (!loader.getCacheAge || isNaN(levelDetails.ageHeader)) {
        levelDetails.ageHeader = 0;
      }
    }
    switch (type) {
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.MANIFEST:
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.LEVEL:
        this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.LEVEL_LOADED, {
          details: levelDetails,
          level: level || 0,
          id: id || 0,
          stats: stats,
          networkDetails: networkDetails,
          deliveryDirectives: deliveryDirectives
        });
        break;
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.AUDIO_TRACK:
        this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.AUDIO_TRACK_LOADED, {
          details: levelDetails,
          id: id || 0,
          groupId: groupId || '',
          stats: stats,
          networkDetails: networkDetails,
          deliveryDirectives: deliveryDirectives
        });
        break;
      case _types_loader__WEBPACK_IMPORTED_MODULE_5__.PlaylistContextType.SUBTITLE_TRACK:
        this.hls.trigger(_events__WEBPACK_IMPORTED_MODULE_1__.Events.SUBTITLE_TRACK_LOADED, {
          details: levelDetails,
          id: id || 0,
          groupId: groupId || '',
          stats: stats,
          networkDetails: networkDetails,
          deliveryDirectives: deliveryDirectives
        });
        break;
    }
  };
  return PlaylistLoader;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (PlaylistLoader);

/***/ }),

/***/ "./src/polyfills/number.ts":
/*!*********************************!*\
  !*** ./src/polyfills/number.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "MAX_SAFE_INTEGER": () => (/* binding */ MAX_SAFE_INTEGER),
/* harmony export */   "isFiniteNumber": () => (/* binding */ isFiniteNumber)
/* harmony export */ });
var isFiniteNumber = Number.isFinite || function (value) {
  return typeof value === 'number' && isFinite(value);
};
var MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER || 9007199254740991;

/***/ }),

/***/ "./src/remux/aac-helper.ts":
/*!*********************************!*\
  !*** ./src/remux/aac-helper.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/**
 *  AAC helper
 */
var AAC = /*#__PURE__*/function () {
  function AAC() {}
  AAC.getSilentFrame = function getSilentFrame(codec, channelCount) {
    switch (codec) {
      case 'mp4a.40.2':
        if (channelCount === 1) {
          return new Uint8Array([0x00, 0xc8, 0x00, 0x80, 0x23, 0x80]);
        } else if (channelCount === 2) {
          return new Uint8Array([0x21, 0x00, 0x49, 0x90, 0x02, 0x19, 0x00, 0x23, 0x80]);
        } else if (channelCount === 3) {
          return new Uint8Array([0x00, 0xc8, 0x00, 0x80, 0x20, 0x84, 0x01, 0x26, 0x40, 0x08, 0x64, 0x00, 0x8e]);
        } else if (channelCount === 4) {
          return new Uint8Array([0x00, 0xc8, 0x00, 0x80, 0x20, 0x84, 0x01, 0x26, 0x40, 0x08, 0x64, 0x00, 0x80, 0x2c, 0x80, 0x08, 0x02, 0x38]);
        } else if (channelCount === 5) {
          return new Uint8Array([0x00, 0xc8, 0x00, 0x80, 0x20, 0x84, 0x01, 0x26, 0x40, 0x08, 0x64, 0x00, 0x82, 0x30, 0x04, 0x99, 0x00, 0x21, 0x90, 0x02, 0x38]);
        } else if (channelCount === 6) {
          return new Uint8Array([0x00, 0xc8, 0x00, 0x80, 0x20, 0x84, 0x01, 0x26, 0x40, 0x08, 0x64, 0x00, 0x82, 0x30, 0x04, 0x99, 0x00, 0x21, 0x90, 0x02, 0x00, 0xb2, 0x00, 0x20, 0x08, 0xe0]);
        }
        break;
      // handle HE-AAC below (mp4a.40.5 / mp4a.40.29)
      default:
        if (channelCount === 1) {
          // ffmpeg -y -f lavfi -i "aevalsrc=0:d=0.05" -c:a libfdk_aac -profile:a aac_he -b:a 4k output.aac && hexdump -v -e '16/1 "0x%x," "\n"' -v output.aac
          return new Uint8Array([0x1, 0x40, 0x22, 0x80, 0xa3, 0x4e, 0xe6, 0x80, 0xba, 0x8, 0x0, 0x0, 0x0, 0x1c, 0x6, 0xf1, 0xc1, 0xa, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5e]);
        } else if (channelCount === 2) {
          // ffmpeg -y -f lavfi -i "aevalsrc=0|0:d=0.05" -c:a libfdk_aac -profile:a aac_he_v2 -b:a 4k output.aac && hexdump -v -e '16/1 "0x%x," "\n"' -v output.aac
          return new Uint8Array([0x1, 0x40, 0x22, 0x80, 0xa3, 0x5e, 0xe6, 0x80, 0xba, 0x8, 0x0, 0x0, 0x0, 0x0, 0x95, 0x0, 0x6, 0xf1, 0xa1, 0xa, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5e]);
        } else if (channelCount === 3) {
          // ffmpeg -y -f lavfi -i "aevalsrc=0|0|0:d=0.05" -c:a libfdk_aac -profile:a aac_he_v2 -b:a 4k output.aac && hexdump -v -e '16/1 "0x%x," "\n"' -v output.aac
          return new Uint8Array([0x1, 0x40, 0x22, 0x80, 0xa3, 0x5e, 0xe6, 0x80, 0xba, 0x8, 0x0, 0x0, 0x0, 0x0, 0x95, 0x0, 0x6, 0xf1, 0xa1, 0xa, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5e]);
        }
        break;
    }
    return undefined;
  };
  return AAC;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (AAC);

/***/ }),

/***/ "./src/remux/mp4-generator.ts":
/*!************************************!*\
  !*** ./src/remux/mp4-generator.ts ***!
  \************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/**
 * Generate MP4 Box
 */

var UINT32_MAX = Math.pow(2, 32) - 1;
var MP4 = /*#__PURE__*/function () {
  function MP4() {}
  MP4.init = function init() {
    MP4.types = {
      avc1: [],
      // codingname
      avcC: [],
      btrt: [],
      dinf: [],
      dref: [],
      esds: [],
      ftyp: [],
      hdlr: [],
      mdat: [],
      mdhd: [],
      mdia: [],
      mfhd: [],
      minf: [],
      moof: [],
      moov: [],
      mp4a: [],
      '.mp3': [],
      mvex: [],
      mvhd: [],
      pasp: [],
      sdtp: [],
      stbl: [],
      stco: [],
      stsc: [],
      stsd: [],
      stsz: [],
      stts: [],
      tfdt: [],
      tfhd: [],
      traf: [],
      trak: [],
      trun: [],
      trex: [],
      tkhd: [],
      vmhd: [],
      smhd: []
    };
    var i;
    for (i in MP4.types) {
      if (MP4.types.hasOwnProperty(i)) {
        MP4.types[i] = [i.charCodeAt(0), i.charCodeAt(1), i.charCodeAt(2), i.charCodeAt(3)];
      }
    }
    var videoHdlr = new Uint8Array([0x00,
    // version 0
    0x00, 0x00, 0x00,
    // flags
    0x00, 0x00, 0x00, 0x00,
    // pre_defined
    0x76, 0x69, 0x64, 0x65,
    // handler_type: 'vide'
    0x00, 0x00, 0x00, 0x00,
    // reserved
    0x00, 0x00, 0x00, 0x00,
    // reserved
    0x00, 0x00, 0x00, 0x00,
    // reserved
    0x56, 0x69, 0x64, 0x65, 0x6f, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler'
    ]);

    var audioHdlr = new Uint8Array([0x00,
    // version 0
    0x00, 0x00, 0x00,
    // flags
    0x00, 0x00, 0x00, 0x00,
    // pre_defined
    0x73, 0x6f, 0x75, 0x6e,
    // handler_type: 'soun'
    0x00, 0x00, 0x00, 0x00,
    // reserved
    0x00, 0x00, 0x00, 0x00,
    // reserved
    0x00, 0x00, 0x00, 0x00,
    // reserved
    0x53, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler'
    ]);

    MP4.HDLR_TYPES = {
      video: videoHdlr,
      audio: audioHdlr
    };
    var dref = new Uint8Array([0x00,
    // version 0
    0x00, 0x00, 0x00,
    // flags
    0x00, 0x00, 0x00, 0x01,
    // entry_count
    0x00, 0x00, 0x00, 0x0c,
    // entry_size
    0x75, 0x72, 0x6c, 0x20,
    // 'url' type
    0x00,
    // version 0
    0x00, 0x00, 0x01 // entry_flags
    ]);

    var stco = new Uint8Array([0x00,
    // version
    0x00, 0x00, 0x00,
    // flags
    0x00, 0x00, 0x00, 0x00 // entry_count
    ]);

    MP4.STTS = MP4.STSC = MP4.STCO = stco;
    MP4.STSZ = new Uint8Array([0x00,
    // version
    0x00, 0x00, 0x00,
    // flags
    0x00, 0x00, 0x00, 0x00,
    // sample_size
    0x00, 0x00, 0x00, 0x00 // sample_count
    ]);

    MP4.VMHD = new Uint8Array([0x00,
    // version
    0x00, 0x00, 0x01,
    // flags
    0x00, 0x00,
    // graphicsmode
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // opcolor
    ]);

    MP4.SMHD = new Uint8Array([0x00,
    // version
    0x00, 0x00, 0x00,
    // flags
    0x00, 0x00,
    // balance
    0x00, 0x00 // reserved
    ]);

    MP4.STSD = new Uint8Array([0x00,
    // version 0
    0x00, 0x00, 0x00,
    // flags
    0x00, 0x00, 0x00, 0x01]); // entry_count

    var majorBrand = new Uint8Array([105, 115, 111, 109]); // isom
    var avc1Brand = new Uint8Array([97, 118, 99, 49]); // avc1
    var minorVersion = new Uint8Array([0, 0, 0, 1]);
    MP4.FTYP = MP4.box(MP4.types.ftyp, majorBrand, minorVersion, majorBrand, avc1Brand);
    MP4.DINF = MP4.box(MP4.types.dinf, MP4.box(MP4.types.dref, dref));
  };
  MP4.box = function box(type) {
    var size = 8;
    for (var _len = arguments.length, payload = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      payload[_key - 1] = arguments[_key];
    }
    var i = payload.length;
    var len = i;
    // calculate the total size we need to allocate
    while (i--) {
      size += payload[i].byteLength;
    }
    var result = new Uint8Array(size);
    result[0] = size >> 24 & 0xff;
    result[1] = size >> 16 & 0xff;
    result[2] = size >> 8 & 0xff;
    result[3] = size & 0xff;
    result.set(type, 4);
    // copy the payload into the result
    for (i = 0, size = 8; i < len; i++) {
      // copy payload[i] array @ offset size
      result.set(payload[i], size);
      size += payload[i].byteLength;
    }
    return result;
  };
  MP4.hdlr = function hdlr(type) {
    return MP4.box(MP4.types.hdlr, MP4.HDLR_TYPES[type]);
  };
  MP4.mdat = function mdat(data) {
    return MP4.box(MP4.types.mdat, data);
  };
  MP4.mdhd = function mdhd(timescale, duration) {
    duration *= timescale;
    var upperWordDuration = Math.floor(duration / (UINT32_MAX + 1));
    var lowerWordDuration = Math.floor(duration % (UINT32_MAX + 1));
    return MP4.box(MP4.types.mdhd, new Uint8Array([0x01,
    // version 1
    0x00, 0x00, 0x00,
    // flags
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
    // creation_time
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
    // modification_time
    timescale >> 24 & 0xff, timescale >> 16 & 0xff, timescale >> 8 & 0xff, timescale & 0xff,
    // timescale
    upperWordDuration >> 24, upperWordDuration >> 16 & 0xff, upperWordDuration >> 8 & 0xff, upperWordDuration & 0xff, lowerWordDuration >> 24, lowerWordDuration >> 16 & 0xff, lowerWordDuration >> 8 & 0xff, lowerWordDuration & 0xff, 0x55, 0xc4,
    // 'und' language (undetermined)
    0x00, 0x00]));
  };
  MP4.mdia = function mdia(track) {
    return MP4.box(MP4.types.mdia, MP4.mdhd(track.timescale, track.duration), MP4.hdlr(track.type), MP4.minf(track));
  };
  MP4.mfhd = function mfhd(sequenceNumber) {
    return MP4.box(MP4.types.mfhd, new Uint8Array([0x00, 0x00, 0x00, 0x00,
    // flags
    sequenceNumber >> 24, sequenceNumber >> 16 & 0xff, sequenceNumber >> 8 & 0xff, sequenceNumber & 0xff // sequence_number
    ]));
  };
  MP4.minf = function minf(track) {
    if (track.type === 'audio') {
      return MP4.box(MP4.types.minf, MP4.box(MP4.types.smhd, MP4.SMHD), MP4.DINF, MP4.stbl(track));
    } else {
      return MP4.box(MP4.types.minf, MP4.box(MP4.types.vmhd, MP4.VMHD), MP4.DINF, MP4.stbl(track));
    }
  };
  MP4.moof = function moof(sn, baseMediaDecodeTime, track) {
    return MP4.box(MP4.types.moof, MP4.mfhd(sn), MP4.traf(track, baseMediaDecodeTime));
  }

  /**
   * @param tracks... (optional) {array} the tracks associated with this movie
   */;
  MP4.moov = function moov(tracks) {
    var i = tracks.length;
    var boxes = [];
    while (i--) {
      boxes[i] = MP4.trak(tracks[i]);
    }
    return MP4.box.apply(null, [MP4.types.moov, MP4.mvhd(tracks[0].timescale, tracks[0].duration)].concat(boxes).concat(MP4.mvex(tracks)));
  };
  MP4.mvex = function mvex(tracks) {
    var i = tracks.length;
    var boxes = [];
    while (i--) {
      boxes[i] = MP4.trex(tracks[i]);
    }
    return MP4.box.apply(null, [MP4.types.mvex].concat(boxes));
  };
  MP4.mvhd = function mvhd(timescale, duration) {
    duration *= timescale;
    var upperWordDuration = Math.floor(duration / (UINT32_MAX + 1));
    var lowerWordDuration = Math.floor(duration % (UINT32_MAX + 1));
    var bytes = new Uint8Array([0x01,
    // version 1
    0x00, 0x00, 0x00,
    // flags
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
    // creation_time
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
    // modification_time
    timescale >> 24 & 0xff, timescale >> 16 & 0xff, timescale >> 8 & 0xff, timescale & 0xff,
    // timescale
    upperWordDuration >> 24, upperWordDuration >> 16 & 0xff, upperWordDuration >> 8 & 0xff, upperWordDuration & 0xff, lowerWordDuration >> 24, lowerWordDuration >> 16 & 0xff, lowerWordDuration >> 8 & 0xff, lowerWordDuration & 0xff, 0x00, 0x01, 0x00, 0x00,
    // 1.0 rate
    0x01, 0x00,
    // 1.0 volume
    0x00, 0x00,
    // reserved
    0x00, 0x00, 0x00, 0x00,
    // reserved
    0x00, 0x00, 0x00, 0x00,
    // reserved
    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
    // transformation: unity matrix
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    // pre_defined
    0xff, 0xff, 0xff, 0xff // next_track_ID
    ]);

    return MP4.box(MP4.types.mvhd, bytes);
  };
  MP4.sdtp = function sdtp(track) {
    var samples = track.samples || [];
    var bytes = new Uint8Array(4 + samples.length);
    var i;
    var flags;
    // leave the full box header (4 bytes) all zero
    // write the sample table
    for (i = 0; i < samples.length; i++) {
      flags = samples[i].flags;
      bytes[i + 4] = flags.dependsOn << 4 | flags.isDependedOn << 2 | flags.hasRedundancy;
    }
    return MP4.box(MP4.types.sdtp, bytes);
  };
  MP4.stbl = function stbl(track) {
    return MP4.box(MP4.types.stbl, MP4.stsd(track), MP4.box(MP4.types.stts, MP4.STTS), MP4.box(MP4.types.stsc, MP4.STSC), MP4.box(MP4.types.stsz, MP4.STSZ), MP4.box(MP4.types.stco, MP4.STCO));
  };
  MP4.avc1 = function avc1(track) {
    var sps = [];
    var pps = [];
    var i;
    var data;
    var len;
    // assemble the SPSs

    for (i = 0; i < track.sps.length; i++) {
      data = track.sps[i];
      len = data.byteLength;
      sps.push(len >>> 8 & 0xff);
      sps.push(len & 0xff);

      // SPS
      sps = sps.concat(Array.prototype.slice.call(data));
    }

    // assemble the PPSs
    for (i = 0; i < track.pps.length; i++) {
      data = track.pps[i];
      len = data.byteLength;
      pps.push(len >>> 8 & 0xff);
      pps.push(len & 0xff);
      pps = pps.concat(Array.prototype.slice.call(data));
    }
    var avcc = MP4.box(MP4.types.avcC, new Uint8Array([0x01,
    // version
    sps[3],
    // profile
    sps[4],
    // profile compat
    sps[5],
    // level
    0xfc | 3,
    // lengthSizeMinusOne, hard-coded to 4 bytes
    0xe0 | track.sps.length // 3bit reserved (111) + numOfSequenceParameterSets
    ].concat(sps).concat([track.pps.length // numOfPictureParameterSets
    ]).concat(pps))); // "PPS"
    var width = track.width;
    var height = track.height;
    var hSpacing = track.pixelRatio[0];
    var vSpacing = track.pixelRatio[1];
    return MP4.box(MP4.types.avc1, new Uint8Array([0x00, 0x00, 0x00,
    // reserved
    0x00, 0x00, 0x00,
    // reserved
    0x00, 0x01,
    // data_reference_index
    0x00, 0x00,
    // pre_defined
    0x00, 0x00,
    // reserved
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    // pre_defined
    width >> 8 & 0xff, width & 0xff,
    // width
    height >> 8 & 0xff, height & 0xff,
    // height
    0x00, 0x48, 0x00, 0x00,
    // horizresolution
    0x00, 0x48, 0x00, 0x00,
    // vertresolution
    0x00, 0x00, 0x00, 0x00,
    // reserved
    0x00, 0x01,
    // frame_count
    0x12, 0x64, 0x61, 0x69, 0x6c,
    // dailymotion/hls.js
    0x79, 0x6d, 0x6f, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x68, 0x6c, 0x73, 0x2e, 0x6a, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    // compressorname
    0x00, 0x18,
    // depth = 24
    0x11, 0x11]),
    // pre_defined = -1
    avcc, MP4.box(MP4.types.btrt, new Uint8Array([0x00, 0x1c, 0x9c, 0x80,
    // bufferSizeDB
    0x00, 0x2d, 0xc6, 0xc0,
    // maxBitrate
    0x00, 0x2d, 0xc6, 0xc0])),
    // avgBitrate
    MP4.box(MP4.types.pasp, new Uint8Array([hSpacing >> 24,
    // hSpacing
    hSpacing >> 16 & 0xff, hSpacing >> 8 & 0xff, hSpacing & 0xff, vSpacing >> 24,
    // vSpacing
    vSpacing >> 16 & 0xff, vSpacing >> 8 & 0xff, vSpacing & 0xff])));
  };
  MP4.esds = function esds(track) {
    var configlen = track.config.length;
    return new Uint8Array([0x00,
    // version 0
    0x00, 0x00, 0x00,
    // flags

    0x03,
    // descriptor_type
    0x17 + configlen,
    // length
    0x00, 0x01,
    // es_id
    0x00,
    // stream_priority

    0x04,
    // descriptor_type
    0x0f + configlen,
    // length
    0x40,
    // codec : mpeg4_audio
    0x15,
    // stream_type
    0x00, 0x00, 0x00,
    // buffer_size
    0x00, 0x00, 0x00, 0x00,
    // maxBitrate
    0x00, 0x00, 0x00, 0x00,
    // avgBitrate

    0x05 // descriptor_type
    ].concat([configlen]).concat(track.config).concat([0x06, 0x01, 0x02])); // GASpecificConfig)); // length + audio config descriptor
  };
  MP4.mp4a = function mp4a(track) {
    var samplerate = track.samplerate;
    return MP4.box(MP4.types.mp4a, new Uint8Array([0x00, 0x00, 0x00,
    // reserved
    0x00, 0x00, 0x00,
    // reserved
    0x00, 0x01,
    // data_reference_index
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    // reserved
    0x00, track.channelCount,
    // channelcount
    0x00, 0x10,
    // sampleSize:16bits
    0x00, 0x00, 0x00, 0x00,
    // reserved2
    samplerate >> 8 & 0xff, samplerate & 0xff,
    //
    0x00, 0x00]), MP4.box(MP4.types.esds, MP4.esds(track)));
  };
  MP4.mp3 = function mp3(track) {
    var samplerate = track.samplerate;
    return MP4.box(MP4.types['.mp3'], new Uint8Array([0x00, 0x00, 0x00,
    // reserved
    0x00, 0x00, 0x00,
    // reserved
    0x00, 0x01,
    // data_reference_index
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    // reserved
    0x00, track.channelCount,
    // channelcount
    0x00, 0x10,
    // sampleSize:16bits
    0x00, 0x00, 0x00, 0x00,
    // reserved2
    samplerate >> 8 & 0xff, samplerate & 0xff,
    //
    0x00, 0x00]));
  };
  MP4.stsd = function stsd(track) {
    if (track.type === 'audio') {
      if (track.segmentCodec === 'mp3' && track.codec === 'mp3') {
        return MP4.box(MP4.types.stsd, MP4.STSD, MP4.mp3(track));
      }
      return MP4.box(MP4.types.stsd, MP4.STSD, MP4.mp4a(track));
    } else {
      return MP4.box(MP4.types.stsd, MP4.STSD, MP4.avc1(track));
    }
  };
  MP4.tkhd = function tkhd(track) {
    var id = track.id;
    var duration = track.duration * track.timescale;
    var width = track.width;
    var height = track.height;
    var upperWordDuration = Math.floor(duration / (UINT32_MAX + 1));
    var lowerWordDuration = Math.floor(duration % (UINT32_MAX + 1));
    return MP4.box(MP4.types.tkhd, new Uint8Array([0x01,
    // version 1
    0x00, 0x00, 0x07,
    // flags
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
    // creation_time
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
    // modification_time
    id >> 24 & 0xff, id >> 16 & 0xff, id >> 8 & 0xff, id & 0xff,
    // track_ID
    0x00, 0x00, 0x00, 0x00,
    // reserved
    upperWordDuration >> 24, upperWordDuration >> 16 & 0xff, upperWordDuration >> 8 & 0xff, upperWordDuration & 0xff, lowerWordDuration >> 24, lowerWordDuration >> 16 & 0xff, lowerWordDuration >> 8 & 0xff, lowerWordDuration & 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    // reserved
    0x00, 0x00,
    // layer
    0x00, 0x00,
    // alternate_group
    0x00, 0x00,
    // non-audio track volume
    0x00, 0x00,
    // reserved
    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
    // transformation: unity matrix
    width >> 8 & 0xff, width & 0xff, 0x00, 0x00,
    // width
    height >> 8 & 0xff, height & 0xff, 0x00, 0x00 // height
    ]));
  };
  MP4.traf = function traf(track, baseMediaDecodeTime) {
    var sampleDependencyTable = MP4.sdtp(track);
    var id = track.id;
    var upperWordBaseMediaDecodeTime = Math.floor(baseMediaDecodeTime / (UINT32_MAX + 1));
    var lowerWordBaseMediaDecodeTime = Math.floor(baseMediaDecodeTime % (UINT32_MAX + 1));
    return MP4.box(MP4.types.traf, MP4.box(MP4.types.tfhd, new Uint8Array([0x00,
    // version 0
    0x00, 0x00, 0x00,
    // flags
    id >> 24, id >> 16 & 0xff, id >> 8 & 0xff, id & 0xff // track_ID
    ])), MP4.box(MP4.types.tfdt, new Uint8Array([0x01,
    // version 1
    0x00, 0x00, 0x00,
    // flags
    upperWordBaseMediaDecodeTime >> 24, upperWordBaseMediaDecodeTime >> 16 & 0xff, upperWordBaseMediaDecodeTime >> 8 & 0xff, upperWordBaseMediaDecodeTime & 0xff, lowerWordBaseMediaDecodeTime >> 24, lowerWordBaseMediaDecodeTime >> 16 & 0xff, lowerWordBaseMediaDecodeTime >> 8 & 0xff, lowerWordBaseMediaDecodeTime & 0xff])), MP4.trun(track, sampleDependencyTable.length + 16 +
    // tfhd
    20 +
    // tfdt
    8 +
    // traf header
    16 +
    // mfhd
    8 +
    // moof header
    8),
    // mdat header
    sampleDependencyTable);
  }

  /**
   * Generate a track box.
   * @param track {object} a track definition
   * @return {Uint8Array} the track box
   */;
  MP4.trak = function trak(track) {
    track.duration = track.duration || 0xffffffff;
    return MP4.box(MP4.types.trak, MP4.tkhd(track), MP4.mdia(track));
  };
  MP4.trex = function trex(track) {
    var id = track.id;
    return MP4.box(MP4.types.trex, new Uint8Array([0x00,
    // version 0
    0x00, 0x00, 0x00,
    // flags
    id >> 24, id >> 16 & 0xff, id >> 8 & 0xff, id & 0xff,
    // track_ID
    0x00, 0x00, 0x00, 0x01,
    // default_sample_description_index
    0x00, 0x00, 0x00, 0x00,
    // default_sample_duration
    0x00, 0x00, 0x00, 0x00,
    // default_sample_size
    0x00, 0x01, 0x00, 0x01 // default_sample_flags
    ]));
  };
  MP4.trun = function trun(track, offset) {
    var samples = track.samples || [];
    var len = samples.length;
    var arraylen = 12 + 16 * len;
    var array = new Uint8Array(arraylen);
    var i;
    var sample;
    var duration;
    var size;
    var flags;
    var cts;
    offset += 8 + arraylen;
    array.set([track.type === 'video' ? 0x01 : 0x00,
    // version 1 for video with signed-int sample_composition_time_offset
    0x00, 0x0f, 0x01,
    // flags
    len >>> 24 & 0xff, len >>> 16 & 0xff, len >>> 8 & 0xff, len & 0xff,
    // sample_count
    offset >>> 24 & 0xff, offset >>> 16 & 0xff, offset >>> 8 & 0xff, offset & 0xff // data_offset
    ], 0);
    for (i = 0; i < len; i++) {
      sample = samples[i];
      duration = sample.duration;
      size = sample.size;
      flags = sample.flags;
      cts = sample.cts;
      array.set([duration >>> 24 & 0xff, duration >>> 16 & 0xff, duration >>> 8 & 0xff, duration & 0xff,
      // sample_duration
      size >>> 24 & 0xff, size >>> 16 & 0xff, size >>> 8 & 0xff, size & 0xff,
      // sample_size
      flags.isLeading << 2 | flags.dependsOn, flags.isDependedOn << 6 | flags.hasRedundancy << 4 | flags.paddingValue << 1 | flags.isNonSync, flags.degradPrio & 0xf0 << 8, flags.degradPrio & 0x0f,
      // sample_flags
      cts >>> 24 & 0xff, cts >>> 16 & 0xff, cts >>> 8 & 0xff, cts & 0xff // sample_composition_time_offset
      ], 12 + 16 * i);
    }
    return MP4.box(MP4.types.trun, array);
  };
  MP4.initSegment = function initSegment(tracks) {
    if (!MP4.types) {
      MP4.init();
    }
    var movie = MP4.moov(tracks);
    var result = new Uint8Array(MP4.FTYP.byteLength + movie.byteLength);
    result.set(MP4.FTYP);
    result.set(movie, MP4.FTYP.byteLength);
    return result;
  };
  return MP4;
}();
MP4.types = void 0;
MP4.HDLR_TYPES = void 0;
MP4.STTS = void 0;
MP4.STSC = void 0;
MP4.STCO = void 0;
MP4.STSZ = void 0;
MP4.VMHD = void 0;
MP4.SMHD = void 0;
MP4.STSD = void 0;
MP4.FTYP = void 0;
MP4.DINF = void 0;
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (MP4);

/***/ }),

/***/ "./src/remux/mp4-remuxer.ts":
/*!**********************************!*\
  !*** ./src/remux/mp4-remuxer.ts ***!
  \**********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ MP4Remuxer),
/* harmony export */   "flushTextTrackMetadataCueSamples": () => (/* binding */ flushTextTrackMetadataCueSamples),
/* harmony export */   "flushTextTrackUserdataCueSamples": () => (/* binding */ flushTextTrackUserdataCueSamples),
/* harmony export */   "normalizePts": () => (/* binding */ normalizePts)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _aac_helper__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./aac-helper */ "./src/remux/aac-helper.ts");
/* harmony import */ var _mp4_generator__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./mp4-generator */ "./src/remux/mp4-generator.ts");
/* harmony import */ var _events__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../events */ "./src/events.ts");
/* harmony import */ var _errors__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../errors */ "./src/errors.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _types_loader__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(/*! ../types/loader */ "./src/types/loader.ts");
/* harmony import */ var _utils_timescale_conversion__WEBPACK_IMPORTED_MODULE_7__ = __webpack_require__(/*! ../utils/timescale-conversion */ "./src/utils/timescale-conversion.ts");

function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }







var MAX_SILENT_FRAME_DURATION = 10 * 1000; // 10 seconds
var AAC_SAMPLES_PER_FRAME = 1024;
var MPEG_AUDIO_SAMPLE_PER_FRAME = 1152;
var chromeVersion = null;
var safariWebkitVersion = null;
var MP4Remuxer = /*#__PURE__*/function () {
  function MP4Remuxer(observer, config, typeSupported, vendor) {
    if (vendor === void 0) {
      vendor = '';
    }
    this.observer = void 0;
    this.config = void 0;
    this.typeSupported = void 0;
    this.ISGenerated = false;
    this._initPTS = void 0;
    this._initDTS = void 0;
    this.nextAvcDts = null;
    this.nextAudioPts = null;
    this.videoSampleDuration = null;
    this.isAudioContiguous = false;
    this.isVideoContiguous = false;
    this.observer = observer;
    this.config = config;
    this.typeSupported = typeSupported;
    this.ISGenerated = false;
    if (chromeVersion === null) {
      var userAgent = navigator.userAgent || '';
      var result = userAgent.match(/Chrome\/(\d+)/i);
      chromeVersion = result ? parseInt(result[1]) : 0;
    }
    if (safariWebkitVersion === null) {
      var _result = navigator.userAgent.match(/Safari\/(\d+)/i);
      safariWebkitVersion = _result ? parseInt(_result[1]) : 0;
    }
  }
  var _proto = MP4Remuxer.prototype;
  _proto.destroy = function destroy() {};
  _proto.resetTimeStamp = function resetTimeStamp(defaultTimeStamp) {
    _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.log('[mp4-remuxer]: initPTS & initDTS reset');
    this._initPTS = this._initDTS = defaultTimeStamp;
  };
  _proto.resetNextTimestamp = function resetNextTimestamp() {
    _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.log('[mp4-remuxer]: reset next timestamp');
    this.isVideoContiguous = false;
    this.isAudioContiguous = false;
  };
  _proto.resetInitSegment = function resetInitSegment() {
    _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.log('[mp4-remuxer]: ISGenerated flag reset');
    this.ISGenerated = false;
  };
  _proto.getVideoStartPts = function getVideoStartPts(videoSamples) {
    var rolloverDetected = false;
    var startPTS = videoSamples.reduce(function (minPTS, sample) {
      var delta = sample.pts - minPTS;
      if (delta < -4294967296) {
        // 2^32, see PTSNormalize for reasoning, but we're hitting a rollover here, and we don't want that to impact the timeOffset calculation
        rolloverDetected = true;
        return normalizePts(minPTS, sample.pts);
      } else if (delta > 0) {
        return minPTS;
      } else {
        return sample.pts;
      }
    }, videoSamples[0].pts);
    if (rolloverDetected) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.debug('PTS rollover detected');
    }
    return startPTS;
  };
  _proto.remux = function remux(audioTrack, videoTrack, id3Track, textTrack, timeOffset, accurateTimeOffset, flush, playlistType) {
    var video;
    var audio;
    var initSegment;
    var text;
    var id3;
    var independent;
    var audioTimeOffset = timeOffset;
    var videoTimeOffset = timeOffset;

    // If we're remuxing audio and video progressively, wait until we've received enough samples for each track before proceeding.
    // This is done to synchronize the audio and video streams. We know if the current segment will have samples if the "pid"
    // parameter is greater than -1. The pid is set when the PMT is parsed, which contains the tracks list.
    // However, if the initSegment has already been generated, or we've reached the end of a segment (flush),
    // then we can remux one track without waiting for the other.
    var hasAudio = audioTrack.pid > -1;
    var hasVideo = videoTrack.pid > -1;
    var length = videoTrack.samples.length;
    var enoughAudioSamples = audioTrack.samples.length > 0;
    var enoughVideoSamples = flush && length > 0 || length > 1;
    var canRemuxAvc = (!hasAudio || enoughAudioSamples) && (!hasVideo || enoughVideoSamples) || this.ISGenerated || flush;
    if (canRemuxAvc) {
      if (!this.ISGenerated) {
        initSegment = this.generateIS(audioTrack, videoTrack, timeOffset);
      }
      var isVideoContiguous = this.isVideoContiguous;
      var firstKeyFrameIndex = -1;
      var firstKeyFramePTS;
      if (enoughVideoSamples) {
        firstKeyFrameIndex = findKeyframeIndex(videoTrack.samples);
        if (!isVideoContiguous && this.config.forceKeyFrameOnDiscontinuity) {
          independent = true;
          if (firstKeyFrameIndex > 0) {
            _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.warn("[mp4-remuxer]: Dropped " + firstKeyFrameIndex + " out of " + length + " video samples due to a missing keyframe");
            var startPTS = this.getVideoStartPts(videoTrack.samples);
            videoTrack.samples = videoTrack.samples.slice(firstKeyFrameIndex);
            videoTrack.dropped += firstKeyFrameIndex;
            videoTimeOffset += (videoTrack.samples[0].pts - startPTS) / videoTrack.inputTimeScale;
            firstKeyFramePTS = videoTimeOffset;
          } else if (firstKeyFrameIndex === -1) {
            _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.warn("[mp4-remuxer]: No keyframe found out of " + length + " video samples");
            independent = false;
          }
        }
      }
      if (this.ISGenerated) {
        if (enoughAudioSamples && enoughVideoSamples) {
          // timeOffset is expected to be the offset of the first timestamp of this fragment (first DTS)
          // if first audio DTS is not aligned with first video DTS then we need to take that into account
          // when providing timeOffset to remuxAudio / remuxVideo. if we don't do that, there might be a permanent / small
          // drift between audio and video streams
          var _startPTS = this.getVideoStartPts(videoTrack.samples);
          var tsDelta = normalizePts(audioTrack.samples[0].pts, _startPTS) - _startPTS;
          var audiovideoTimestampDelta = tsDelta / videoTrack.inputTimeScale;
          audioTimeOffset += Math.max(0, audiovideoTimestampDelta);
          videoTimeOffset += Math.max(0, -audiovideoTimestampDelta);
        }

        // Purposefully remuxing audio before video, so that remuxVideo can use nextAudioPts, which is calculated in remuxAudio.
        if (enoughAudioSamples) {
          // if initSegment was generated without audio samples, regenerate it again
          if (!audioTrack.samplerate) {
            _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.warn('[mp4-remuxer]: regenerate InitSegment as audio detected');
            initSegment = this.generateIS(audioTrack, videoTrack, timeOffset);
          }
          audio = this.remuxAudio(audioTrack, audioTimeOffset, this.isAudioContiguous, accurateTimeOffset, hasVideo || enoughVideoSamples || playlistType === _types_loader__WEBPACK_IMPORTED_MODULE_6__.PlaylistLevelType.AUDIO ? videoTimeOffset : undefined);
          if (enoughVideoSamples) {
            var audioTrackLength = audio ? audio.endPTS - audio.startPTS : 0;
            // if initSegment was generated without video samples, regenerate it again
            if (!videoTrack.inputTimeScale) {
              _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.warn('[mp4-remuxer]: regenerate InitSegment as video detected');
              initSegment = this.generateIS(audioTrack, videoTrack, timeOffset);
            }
            video = this.remuxVideo(videoTrack, videoTimeOffset, isVideoContiguous, audioTrackLength);
          }
        } else if (enoughVideoSamples) {
          video = this.remuxVideo(videoTrack, videoTimeOffset, isVideoContiguous, 0);
        }
        if (video) {
          video.firstKeyFrame = firstKeyFrameIndex;
          video.independent = firstKeyFrameIndex !== -1;
          video.firstKeyFramePTS = firstKeyFramePTS;
        }
      }
    }

    // Allow ID3 and text to remux, even if more audio/video samples are required
    if (this.ISGenerated) {
      if (id3Track.samples.length) {
        id3 = flushTextTrackMetadataCueSamples(id3Track, timeOffset, this._initPTS, this._initDTS);
      }
      if (textTrack.samples.length) {
        text = flushTextTrackUserdataCueSamples(textTrack, timeOffset, this._initPTS);
      }
    }
    return {
      audio: audio,
      video: video,
      initSegment: initSegment,
      independent: independent,
      text: text,
      id3: id3
    };
  };
  _proto.generateIS = function generateIS(audioTrack, videoTrack, timeOffset) {
    var audioSamples = audioTrack.samples;
    var videoSamples = videoTrack.samples;
    var typeSupported = this.typeSupported;
    var tracks = {};
    var computePTSDTS = !(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(this._initPTS);
    var container = 'audio/mp4';
    var initPTS;
    var initDTS;
    var timescale;
    if (computePTSDTS) {
      initPTS = initDTS = Infinity;
    }
    if (audioTrack.config && audioSamples.length) {
      // let's use audio sampling rate as MP4 time scale.
      // rationale is that there is a integer nb of audio frames per audio sample (1024 for AAC)
      // using audio sampling rate here helps having an integer MP4 frame duration
      // this avoids potential rounding issue and AV sync issue
      audioTrack.timescale = audioTrack.samplerate;
      switch (audioTrack.segmentCodec) {
        case 'mp3':
          if (typeSupported.mpeg) {
            // Chrome and Safari
            container = 'audio/mpeg';
            audioTrack.codec = '';
          } else if (typeSupported.mp3) {
            // Firefox
            audioTrack.codec = 'mp3';
          }
          break;
      }
      tracks.audio = {
        id: 'audio',
        container: container,
        codec: audioTrack.codec,
        initSegment: audioTrack.segmentCodec === 'mp3' && typeSupported.mpeg ? new Uint8Array(0) : _mp4_generator__WEBPACK_IMPORTED_MODULE_2__["default"].initSegment([audioTrack]),
        metadata: {
          channelCount: audioTrack.channelCount
        }
      };
      if (computePTSDTS) {
        timescale = audioTrack.inputTimeScale;
        // remember first PTS of this demuxing context. for audio, PTS = DTS
        initPTS = initDTS = audioSamples[0].pts - Math.round(timescale * timeOffset);
      }
    }
    if (videoTrack.sps && videoTrack.pps && videoSamples.length) {
      // let's use input time scale as MP4 video timescale
      // we use input time scale straight away to avoid rounding issues on frame duration / cts computation
      videoTrack.timescale = videoTrack.inputTimeScale;
      tracks.video = {
        id: 'main',
        container: 'video/mp4',
        codec: videoTrack.codec,
        initSegment: _mp4_generator__WEBPACK_IMPORTED_MODULE_2__["default"].initSegment([videoTrack]),
        metadata: {
          width: videoTrack.width,
          height: videoTrack.height
        }
      };
      if (computePTSDTS) {
        timescale = videoTrack.inputTimeScale;
        var startPTS = this.getVideoStartPts(videoSamples);
        var startOffset = Math.round(timescale * timeOffset);
        initDTS = Math.min(initDTS, normalizePts(videoSamples[0].dts, startPTS) - startOffset);
        initPTS = Math.min(initPTS, startPTS - startOffset);
      }
    }
    if (Object.keys(tracks).length) {
      this.ISGenerated = true;
      if (computePTSDTS) {
        this._initPTS = initPTS;
        this._initDTS = initDTS;
      }
      return {
        tracks: tracks,
        initPTS: initPTS,
        timescale: timescale
      };
    }
  };
  _proto.remuxVideo = function remuxVideo(track, timeOffset, contiguous, audioTrackLength) {
    var timeScale = track.inputTimeScale;
    var inputSamples = track.samples;
    var outputSamples = [];
    var nbSamples = inputSamples.length;
    var initPTS = this._initPTS;
    var nextAvcDts = this.nextAvcDts;
    var offset = 8;
    var mp4SampleDuration = this.videoSampleDuration;
    var firstDTS;
    var lastDTS;
    var minPTS = Number.POSITIVE_INFINITY;
    var maxPTS = Number.NEGATIVE_INFINITY;
    var sortSamples = false;

    // if parsed fragment is contiguous with last one, let's use last DTS value as reference
    if (!contiguous || nextAvcDts === null) {
      var pts = timeOffset * timeScale;
      var cts = inputSamples[0].pts - normalizePts(inputSamples[0].dts, inputSamples[0].pts);
      // if not contiguous, let's use target timeOffset
      nextAvcDts = pts - cts;
    }

    // PTS is coded on 33bits, and can loop from -2^32 to 2^32
    // PTSNormalize will make PTS/DTS value monotonic, we use last known DTS value as reference value
    for (var i = 0; i < nbSamples; i++) {
      var sample = inputSamples[i];
      sample.pts = normalizePts(sample.pts - initPTS, nextAvcDts);
      sample.dts = normalizePts(sample.dts - initPTS, nextAvcDts);
      if (sample.dts < inputSamples[i > 0 ? i - 1 : i].dts) {
        sortSamples = true;
      }
    }

    // sort video samples by DTS then PTS then demux id order
    if (sortSamples) {
      inputSamples.sort(function (a, b) {
        var deltadts = a.dts - b.dts;
        var deltapts = a.pts - b.pts;
        return deltadts || deltapts;
      });
    }

    // Get first/last DTS
    firstDTS = inputSamples[0].dts;
    lastDTS = inputSamples[inputSamples.length - 1].dts;

    // Sample duration (as expected by trun MP4 boxes), should be the delta between sample DTS
    // set this constant duration as being the avg delta between consecutive DTS.
    var inputDuration = lastDTS - firstDTS;
    var averageSampleDuration = inputDuration ? Math.round(inputDuration / (nbSamples - 1)) : mp4SampleDuration || track.inputTimeScale / 30;

    // if fragment are contiguous, detect hole/overlapping between fragments
    if (contiguous) {
      // check timestamp continuity across consecutive fragments (this is to remove inter-fragment gap/hole)
      var delta = firstDTS - nextAvcDts;
      var foundHole = delta > averageSampleDuration;
      var foundOverlap = delta < -1;
      if (foundHole || foundOverlap) {
        if (foundHole) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.warn("AVC: " + (0,_utils_timescale_conversion__WEBPACK_IMPORTED_MODULE_7__.toMsFromMpegTsClock)(delta, true) + " ms (" + delta + "dts) hole between fragments detected, filling it");
        } else {
          _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.warn("AVC: " + (0,_utils_timescale_conversion__WEBPACK_IMPORTED_MODULE_7__.toMsFromMpegTsClock)(-delta, true) + " ms (" + delta + "dts) overlapping between fragments detected");
        }
        if (!foundOverlap || nextAvcDts > inputSamples[0].pts) {
          firstDTS = nextAvcDts;
          var firstPTS = inputSamples[0].pts - delta;
          inputSamples[0].dts = firstDTS;
          inputSamples[0].pts = firstPTS;
          _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.log("Video: First PTS/DTS adjusted: " + (0,_utils_timescale_conversion__WEBPACK_IMPORTED_MODULE_7__.toMsFromMpegTsClock)(firstPTS, true) + "/" + (0,_utils_timescale_conversion__WEBPACK_IMPORTED_MODULE_7__.toMsFromMpegTsClock)(firstDTS, true) + ", delta: " + (0,_utils_timescale_conversion__WEBPACK_IMPORTED_MODULE_7__.toMsFromMpegTsClock)(delta, true) + " ms");
        }
      }
    }
    firstDTS = Math.max(0, firstDTS);
    var nbNalu = 0;
    var naluLen = 0;
    for (var _i = 0; _i < nbSamples; _i++) {
      // compute total/avc sample length and nb of NAL units
      var _sample = inputSamples[_i];
      var units = _sample.units;
      var nbUnits = units.length;
      var sampleLen = 0;
      for (var j = 0; j < nbUnits; j++) {
        sampleLen += units[j].data.length;
      }
      naluLen += sampleLen;
      nbNalu += nbUnits;
      _sample.length = sampleLen;

      // ensure sample monotonic DTS
      _sample.dts = Math.max(_sample.dts, firstDTS);
      minPTS = Math.min(_sample.pts, minPTS);
      maxPTS = Math.max(_sample.pts, maxPTS);
    }
    lastDTS = inputSamples[nbSamples - 1].dts;

    /* concatenate the video data and construct the mdat in place
      (need 8 more bytes to fill length and mpdat type) */
    var mdatSize = naluLen + 4 * nbNalu + 8;
    var mdat;
    try {
      mdat = new Uint8Array(mdatSize);
    } catch (err) {
      this.observer.emit(_events__WEBPACK_IMPORTED_MODULE_3__.Events.ERROR, _events__WEBPACK_IMPORTED_MODULE_3__.Events.ERROR, {
        type: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorTypes.MUX_ERROR,
        details: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorDetails.REMUX_ALLOC_ERROR,
        fatal: false,
        bytes: mdatSize,
        reason: "fail allocating video mdat " + mdatSize
      });
      return;
    }
    var view = new DataView(mdat.buffer);
    view.setUint32(0, mdatSize);
    mdat.set(_mp4_generator__WEBPACK_IMPORTED_MODULE_2__["default"].types.mdat, 4);
    var stretchedLastFrame = false;
    var minDtsDelta = Number.POSITIVE_INFINITY;
    var minPtsDelta = Number.POSITIVE_INFINITY;
    var maxDtsDelta = Number.NEGATIVE_INFINITY;
    var maxPtsDelta = Number.NEGATIVE_INFINITY;
    for (var _i2 = 0; _i2 < nbSamples; _i2++) {
      var avcSample = inputSamples[_i2];
      var avcSampleUnits = avcSample.units;
      var mp4SampleLength = 0;
      // convert NALU bitstream to MP4 format (prepend NALU with size field)
      for (var _j = 0, _nbUnits = avcSampleUnits.length; _j < _nbUnits; _j++) {
        var unit = avcSampleUnits[_j];
        var unitData = unit.data;
        var unitDataLen = unit.data.byteLength;
        view.setUint32(offset, unitDataLen);
        offset += 4;
        mdat.set(unitData, offset);
        offset += unitDataLen;
        mp4SampleLength += 4 + unitDataLen;
      }

      // expected sample duration is the Decoding Timestamp diff of consecutive samples
      var ptsDelta = void 0;
      if (_i2 < nbSamples - 1) {
        mp4SampleDuration = inputSamples[_i2 + 1].dts - avcSample.dts;
        ptsDelta = inputSamples[_i2 + 1].pts - avcSample.pts;
      } else {
        var config = this.config;
        var lastFrameDuration = _i2 > 0 ? avcSample.dts - inputSamples[_i2 - 1].dts : averageSampleDuration;
        ptsDelta = _i2 > 0 ? avcSample.pts - inputSamples[_i2 - 1].pts : averageSampleDuration;
        if (config.stretchShortVideoTrack && this.nextAudioPts !== null) {
          // In some cases, a segment's audio track duration may exceed the video track duration.
          // Since we've already remuxed audio, and we know how long the audio track is, we look to
          // see if the delta to the next segment is longer than maxBufferHole.
          // If so, playback would potentially get stuck, so we artificially inflate
          // the duration of the last frame to minimize any potential gap between segments.
          var gapTolerance = Math.floor(config.maxBufferHole * timeScale);
          var deltaToFrameEnd = (audioTrackLength ? minPTS + audioTrackLength * timeScale : this.nextAudioPts) - avcSample.pts;
          if (deltaToFrameEnd > gapTolerance) {
            // We subtract lastFrameDuration from deltaToFrameEnd to try to prevent any video
            // frame overlap. maxBufferHole should be >> lastFrameDuration anyway.
            mp4SampleDuration = deltaToFrameEnd - lastFrameDuration;
            if (mp4SampleDuration < 0) {
              mp4SampleDuration = lastFrameDuration;
            } else {
              stretchedLastFrame = true;
            }
            _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.log("[mp4-remuxer]: It is approximately " + deltaToFrameEnd / 90 + " ms to the next segment; using duration " + mp4SampleDuration / 90 + " ms for the last video frame.");
          } else {
            mp4SampleDuration = lastFrameDuration;
          }
        } else {
          mp4SampleDuration = lastFrameDuration;
        }
      }
      var compositionTimeOffset = Math.round(avcSample.pts - avcSample.dts);
      minDtsDelta = Math.min(minDtsDelta, mp4SampleDuration);
      maxDtsDelta = Math.max(maxDtsDelta, mp4SampleDuration);
      minPtsDelta = Math.min(minPtsDelta, ptsDelta);
      maxPtsDelta = Math.max(maxPtsDelta, ptsDelta);
      outputSamples.push(new Mp4Sample(avcSample.key, mp4SampleDuration, mp4SampleLength, compositionTimeOffset));
    }
    if (outputSamples.length) {
      if (chromeVersion) {
        if (chromeVersion < 70) {
          // Chrome workaround, mark first sample as being a Random Access Point (keyframe) to avoid sourcebuffer append issue
          // https://code.google.com/p/chromium/issues/detail?id=229412
          var flags = outputSamples[0].flags;
          flags.dependsOn = 2;
          flags.isNonSync = 0;
        }
      } else if (safariWebkitVersion) {
        // Fix for "CNN special report, with CC" in test-streams (Safari browser only)
        // Ignore DTS when frame durations are irregular. Safari MSE does not handle this leading to gaps.
        if (maxPtsDelta - minPtsDelta < maxDtsDelta - minDtsDelta && averageSampleDuration / maxDtsDelta < 0.025 && outputSamples[0].cts === 0) {
          _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.warn('Found irregular gaps in sample duration. Using PTS instead of DTS to determine MP4 sample duration.');
          var dts = firstDTS;
          for (var _i3 = 0, len = outputSamples.length; _i3 < len; _i3++) {
            var nextDts = dts + outputSamples[_i3].duration;
            var _pts = dts + outputSamples[_i3].cts;
            if (_i3 < len - 1) {
              var nextPts = nextDts + outputSamples[_i3 + 1].cts;
              outputSamples[_i3].duration = nextPts - _pts;
            } else {
              outputSamples[_i3].duration = _i3 ? outputSamples[_i3 - 1].duration : averageSampleDuration;
            }
            outputSamples[_i3].cts = 0;
            dts = nextDts;
          }
        }
      }
    }
    console.assert(mp4SampleDuration !== null, 'mp4SampleDuration must be computed');
    // next AVC sample DTS should be equal to last sample DTS + last sample duration (in PES timescale)
    mp4SampleDuration = stretchedLastFrame || !mp4SampleDuration ? averageSampleDuration : mp4SampleDuration;
    this.nextAvcDts = nextAvcDts = lastDTS + mp4SampleDuration;
    this.videoSampleDuration = mp4SampleDuration;
    this.isVideoContiguous = true;
    var moof = _mp4_generator__WEBPACK_IMPORTED_MODULE_2__["default"].moof(track.sequenceNumber++, firstDTS, _extends({}, track, {
      samples: outputSamples
    }));
    var type = 'video';
    var data = {
      data1: moof,
      data2: mdat,
      startPTS: minPTS / timeScale,
      endPTS: (maxPTS + mp4SampleDuration) / timeScale,
      startDTS: firstDTS / timeScale,
      endDTS: nextAvcDts / timeScale,
      type: type,
      hasAudio: false,
      hasVideo: true,
      nb: outputSamples.length,
      dropped: track.dropped
    };
    track.samples = [];
    track.dropped = 0;
    console.assert(mdat.length, 'MDAT length must not be zero');
    return data;
  };
  _proto.remuxAudio = function remuxAudio(track, timeOffset, contiguous, accurateTimeOffset, videoTimeOffset) {
    var inputTimeScale = track.inputTimeScale;
    var mp4timeScale = track.samplerate ? track.samplerate : inputTimeScale;
    var scaleFactor = inputTimeScale / mp4timeScale;
    var mp4SampleDuration = track.segmentCodec === 'aac' ? AAC_SAMPLES_PER_FRAME : MPEG_AUDIO_SAMPLE_PER_FRAME;
    var inputSampleDuration = mp4SampleDuration * scaleFactor;
    var initPTS = this._initPTS;
    var rawMPEG = track.segmentCodec === 'mp3' && this.typeSupported.mpeg;
    var outputSamples = [];
    var alignedWithVideo = videoTimeOffset !== undefined;
    var inputSamples = track.samples;
    var offset = rawMPEG ? 0 : 8;
    var nextAudioPts = this.nextAudioPts || -1;

    // window.audioSamples ? window.audioSamples.push(inputSamples.map(s => s.pts)) : (window.audioSamples = [inputSamples.map(s => s.pts)]);

    // for audio samples, also consider consecutive fragments as being contiguous (even if a level switch occurs),
    // for sake of clarity:
    // consecutive fragments are frags with
    //  - less than 100ms gaps between new time offset (if accurate) and next expected PTS OR
    //  - less than 20 audio frames distance
    // contiguous fragments are consecutive fragments from same quality level (same level, new SN = old SN + 1)
    // this helps ensuring audio continuity
    // and this also avoids audio glitches/cut when switching quality, or reporting wrong duration on first audio frame
    var timeOffsetMpegTS = timeOffset * inputTimeScale;
    this.isAudioContiguous = contiguous = contiguous || inputSamples.length && nextAudioPts > 0 && (accurateTimeOffset && Math.abs(timeOffsetMpegTS - nextAudioPts) < 9000 || Math.abs(normalizePts(inputSamples[0].pts - initPTS, timeOffsetMpegTS) - nextAudioPts) < 20 * inputSampleDuration);

    // compute normalized PTS
    inputSamples.forEach(function (sample) {
      sample.pts = normalizePts(sample.pts - initPTS, timeOffsetMpegTS);
    });
    if (!contiguous || nextAudioPts < 0) {
      // filter out sample with negative PTS that are not playable anyway
      // if we don't remove these negative samples, they will shift all audio samples forward.
      // leading to audio overlap between current / next fragment
      inputSamples = inputSamples.filter(function (sample) {
        return sample.pts >= 0;
      });

      // in case all samples have negative PTS, and have been filtered out, return now
      if (!inputSamples.length) {
        return;
      }
      if (videoTimeOffset === 0) {
        // Set the start to 0 to match video so that start gaps larger than inputSampleDuration are filled with silence
        nextAudioPts = 0;
      } else if (accurateTimeOffset && !alignedWithVideo) {
        // When not seeking, not live, and LevelDetails.PTSKnown, use fragment start as predicted next audio PTS
        nextAudioPts = Math.max(0, timeOffsetMpegTS);
      } else {
        // if frags are not contiguous and if we cant trust time offset, let's use first sample PTS as next audio PTS
        nextAudioPts = inputSamples[0].pts;
      }
    }

    // If the audio track is missing samples, the frames seem to get "left-shifted" within the
    // resulting mp4 segment, causing sync issues and leaving gaps at the end of the audio segment.
    // In an effort to prevent this from happening, we inject frames here where there are gaps.
    // When possible, we inject a silent frame; when that's not possible, we duplicate the last
    // frame.

    if (track.segmentCodec === 'aac') {
      var maxAudioFramesDrift = this.config.maxAudioFramesDrift;
      for (var i = 0, nextPts = nextAudioPts; i < inputSamples.length; i++) {
        // First, let's see how far off this frame is from where we expect it to be
        var sample = inputSamples[i];
        var pts = sample.pts;
        var delta = pts - nextPts;
        var duration = Math.abs(1000 * delta / inputTimeScale);

        // When remuxing with video, if we're overlapping by more than a duration, drop this sample to stay in sync
        if (delta <= -maxAudioFramesDrift * inputSampleDuration && alignedWithVideo) {
          if (i === 0) {
            _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.warn("Audio frame @ " + (pts / inputTimeScale).toFixed(3) + "s overlaps nextAudioPts by " + Math.round(1000 * delta / inputTimeScale) + " ms.");
            this.nextAudioPts = nextAudioPts = nextPts = pts;
          }
        } // eslint-disable-line brace-style

        // Insert missing frames if:
        // 1: We're more than maxAudioFramesDrift frame away
        // 2: Not more than MAX_SILENT_FRAME_DURATION away
        // 3: currentTime (aka nextPtsNorm) is not 0
        // 4: remuxing with video (videoTimeOffset !== undefined)
        else if (delta >= maxAudioFramesDrift * inputSampleDuration && duration < MAX_SILENT_FRAME_DURATION && alignedWithVideo) {
          var missing = Math.round(delta / inputSampleDuration);
          // Adjust nextPts so that silent samples are aligned with media pts. This will prevent media samples from
          // later being shifted if nextPts is based on timeOffset and delta is not a multiple of inputSampleDuration.
          nextPts = pts - missing * inputSampleDuration;
          if (nextPts < 0) {
            missing--;
            nextPts += inputSampleDuration;
          }
          if (i === 0) {
            this.nextAudioPts = nextAudioPts = nextPts;
          }
          _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.warn("[mp4-remuxer]: Injecting " + missing + " audio frame @ " + (nextPts / inputTimeScale).toFixed(3) + "s due to " + Math.round(1000 * delta / inputTimeScale) + " ms gap.");
          for (var j = 0; j < missing; j++) {
            var newStamp = Math.max(nextPts, 0);
            var fillFrame = _aac_helper__WEBPACK_IMPORTED_MODULE_1__["default"].getSilentFrame(track.manifestCodec || track.codec, track.channelCount);
            if (!fillFrame) {
              _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.log('[mp4-remuxer]: Unable to get silent frame for given audio codec; duplicating last frame instead.');
              fillFrame = sample.unit.subarray();
            }
            inputSamples.splice(i, 0, {
              unit: fillFrame,
              pts: newStamp
            });
            nextPts += inputSampleDuration;
            i++;
          }
        }
        sample.pts = nextPts;
        nextPts += inputSampleDuration;
      }
    }
    var firstPTS = null;
    var lastPTS = null;
    var mdat;
    var mdatSize = 0;
    var sampleLength = inputSamples.length;
    while (sampleLength--) {
      mdatSize += inputSamples[sampleLength].unit.byteLength;
    }
    for (var _j2 = 0, _nbSamples = inputSamples.length; _j2 < _nbSamples; _j2++) {
      var audioSample = inputSamples[_j2];
      var unit = audioSample.unit;
      var _pts2 = audioSample.pts;
      if (lastPTS !== null) {
        // If we have more than one sample, set the duration of the sample to the "real" duration; the PTS diff with
        // the previous sample
        var prevSample = outputSamples[_j2 - 1];
        prevSample.duration = Math.round((_pts2 - lastPTS) / scaleFactor);
      } else {
        if (contiguous && track.segmentCodec === 'aac') {
          // set PTS/DTS to expected PTS/DTS
          _pts2 = nextAudioPts;
        }
        // remember first PTS of our audioSamples
        firstPTS = _pts2;
        if (mdatSize > 0) {
          /* concatenate the audio data and construct the mdat in place
            (need 8 more bytes to fill length and mdat type) */
          mdatSize += offset;
          try {
            mdat = new Uint8Array(mdatSize);
          } catch (err) {
            this.observer.emit(_events__WEBPACK_IMPORTED_MODULE_3__.Events.ERROR, _events__WEBPACK_IMPORTED_MODULE_3__.Events.ERROR, {
              type: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorTypes.MUX_ERROR,
              details: _errors__WEBPACK_IMPORTED_MODULE_4__.ErrorDetails.REMUX_ALLOC_ERROR,
              fatal: false,
              bytes: mdatSize,
              reason: "fail allocating audio mdat " + mdatSize
            });
            return;
          }
          if (!rawMPEG) {
            var view = new DataView(mdat.buffer);
            view.setUint32(0, mdatSize);
            mdat.set(_mp4_generator__WEBPACK_IMPORTED_MODULE_2__["default"].types.mdat, 4);
          }
        } else {
          // no audio samples
          return;
        }
      }
      mdat.set(unit, offset);
      var unitLen = unit.byteLength;
      offset += unitLen;
      // Default the sample's duration to the computed mp4SampleDuration, which will either be 1024 for AAC or 1152 for MPEG
      // In the case that we have 1 sample, this will be the duration. If we have more than one sample, the duration
      // becomes the PTS diff with the previous sample
      outputSamples.push(new Mp4Sample(true, mp4SampleDuration, unitLen, 0));
      lastPTS = _pts2;
    }

    // We could end up with no audio samples if all input samples were overlapping with the previously remuxed ones
    var nbSamples = outputSamples.length;
    if (!nbSamples) {
      return;
    }

    // The next audio sample PTS should be equal to last sample PTS + duration
    var lastSample = outputSamples[outputSamples.length - 1];
    this.nextAudioPts = nextAudioPts = lastPTS + scaleFactor * lastSample.duration;

    // Set the track samples from inputSamples to outputSamples before remuxing
    var moof = rawMPEG ? new Uint8Array(0) : _mp4_generator__WEBPACK_IMPORTED_MODULE_2__["default"].moof(track.sequenceNumber++, firstPTS / scaleFactor, _extends({}, track, {
      samples: outputSamples
    }));

    // Clear the track samples. This also clears the samples array in the demuxer, since the reference is shared
    track.samples = [];
    var start = firstPTS / inputTimeScale;
    var end = nextAudioPts / inputTimeScale;
    var type = 'audio';
    var audioData = {
      data1: moof,
      data2: mdat,
      startPTS: start,
      endPTS: end,
      startDTS: start,
      endDTS: end,
      type: type,
      hasAudio: true,
      hasVideo: false,
      nb: nbSamples
    };
    this.isAudioContiguous = true;
    console.assert(mdat.length, 'MDAT length must not be zero');
    return audioData;
  };
  _proto.remuxEmptyAudio = function remuxEmptyAudio(track, timeOffset, contiguous, videoData) {
    var inputTimeScale = track.inputTimeScale;
    var mp4timeScale = track.samplerate ? track.samplerate : inputTimeScale;
    var scaleFactor = inputTimeScale / mp4timeScale;
    var nextAudioPts = this.nextAudioPts;
    // sync with video's timestamp
    var startDTS = (nextAudioPts !== null ? nextAudioPts : videoData.startDTS * inputTimeScale) + this._initDTS;
    var endDTS = videoData.endDTS * inputTimeScale + this._initDTS;
    // one sample's duration value
    var frameDuration = scaleFactor * AAC_SAMPLES_PER_FRAME;
    // samples count of this segment's duration
    var nbSamples = Math.ceil((endDTS - startDTS) / frameDuration);
    // silent frame
    var silentFrame = _aac_helper__WEBPACK_IMPORTED_MODULE_1__["default"].getSilentFrame(track.manifestCodec || track.codec, track.channelCount);
    _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.warn('[mp4-remuxer]: remux empty Audio');
    // Can't remux if we can't generate a silent frame...
    if (!silentFrame) {
      _utils_logger__WEBPACK_IMPORTED_MODULE_5__.logger.trace('[mp4-remuxer]: Unable to remuxEmptyAudio since we were unable to get a silent frame for given audio codec');
      return;
    }
    var samples = [];
    for (var i = 0; i < nbSamples; i++) {
      var stamp = startDTS + i * frameDuration;
      samples.push({
        unit: silentFrame,
        pts: stamp,
        dts: stamp
      });
    }
    track.samples = samples;
    return this.remuxAudio(track, timeOffset, contiguous, false);
  };
  return MP4Remuxer;
}();

function normalizePts(value, reference) {
  var offset;
  if (reference === null) {
    return value;
  }
  if (reference < value) {
    // - 2^33
    offset = -8589934592;
  } else {
    // + 2^33
    offset = 8589934592;
  }
  /* PTS is 33bit (from 0 to 2^33 -1)
    if diff between value and reference is bigger than half of the amplitude (2^32) then it means that
    PTS looping occured. fill the gap */
  while (Math.abs(value - reference) > 4294967296) {
    value += offset;
  }
  return value;
}
function findKeyframeIndex(samples) {
  for (var i = 0; i < samples.length; i++) {
    if (samples[i].key) {
      return i;
    }
  }
  return -1;
}
function flushTextTrackMetadataCueSamples(track, timeOffset, initPTS, initDTS) {
  var length = track.samples.length;
  if (!length) {
    return;
  }
  var inputTimeScale = track.inputTimeScale;
  for (var index = 0; index < length; index++) {
    var sample = track.samples[index];
    // setting id3 pts, dts to relative time
    // using this._initPTS and this._initDTS to calculate relative time
    sample.pts = normalizePts(sample.pts - initPTS, timeOffset * inputTimeScale) / inputTimeScale;
    sample.dts = normalizePts(sample.dts - initDTS, timeOffset * inputTimeScale) / inputTimeScale;
  }
  var samples = track.samples;
  track.samples = [];
  return {
    samples: samples
  };
}
function flushTextTrackUserdataCueSamples(track, timeOffset, initPTS) {
  var length = track.samples.length;
  if (!length) {
    return;
  }
  var inputTimeScale = track.inputTimeScale;
  for (var index = 0; index < length; index++) {
    var sample = track.samples[index];
    // setting text pts, dts to relative time
    // using this._initPTS and this._initDTS to calculate relative time
    sample.pts = normalizePts(sample.pts - initPTS, timeOffset * inputTimeScale) / inputTimeScale;
  }
  track.samples.sort(function (a, b) {
    return a.pts - b.pts;
  });
  var samples = track.samples;
  track.samples = [];
  return {
    samples: samples
  };
}
var Mp4Sample = function Mp4Sample(isKeyframe, duration, size, cts) {
  this.size = void 0;
  this.duration = void 0;
  this.cts = void 0;
  this.flags = void 0;
  this.duration = duration;
  this.size = size;
  this.cts = cts;
  this.flags = new Mp4SampleFlags(isKeyframe);
};
var Mp4SampleFlags = function Mp4SampleFlags(isKeyframe) {
  this.isLeading = 0;
  this.isDependedOn = 0;
  this.hasRedundancy = 0;
  this.degradPrio = 0;
  this.dependsOn = 1;
  this.isNonSync = 1;
  this.dependsOn = isKeyframe ? 2 : 1;
  this.isNonSync = isKeyframe ? 0 : 1;
};

/***/ }),

/***/ "./src/remux/passthrough-remuxer.ts":
/*!******************************************!*\
  !*** ./src/remux/passthrough-remuxer.ts ***!
  \******************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _mp4_remuxer__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./mp4-remuxer */ "./src/remux/mp4-remuxer.ts");
/* harmony import */ var _utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../utils/mp4-tools */ "./src/utils/mp4-tools.ts");
/* harmony import */ var _loader_fragment__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../loader/fragment */ "./src/loader/fragment.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");







var PassThroughRemuxer = /*#__PURE__*/function () {
  function PassThroughRemuxer() {
    this.emitInitSegment = false;
    this.audioCodec = void 0;
    this.videoCodec = void 0;
    this.initData = void 0;
    this.initPTS = void 0;
    this.initTracks = void 0;
    this.lastEndTime = null;
  }
  var _proto = PassThroughRemuxer.prototype;
  _proto.destroy = function destroy() {};
  _proto.resetTimeStamp = function resetTimeStamp(defaultInitPTS) {
    this.initPTS = defaultInitPTS;
    this.lastEndTime = null;
  };
  _proto.resetNextTimestamp = function resetNextTimestamp() {
    this.lastEndTime = null;
  };
  _proto.resetInitSegment = function resetInitSegment(initSegment, audioCodec, videoCodec, decryptdata) {
    this.audioCodec = audioCodec;
    this.videoCodec = videoCodec;
    this.generateInitSegment((0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.patchEncyptionData)(initSegment, decryptdata));
    this.emitInitSegment = true;
  };
  _proto.generateInitSegment = function generateInitSegment(initSegment) {
    var audioCodec = this.audioCodec,
      videoCodec = this.videoCodec;
    if (!initSegment || !initSegment.byteLength) {
      this.initTracks = undefined;
      this.initData = undefined;
      return;
    }
    var initData = this.initData = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.parseInitSegment)(initSegment);

    // Get codec from initSegment or fallback to default
    if (!audioCodec) {
      audioCodec = getParsedTrackCodec(initData.audio, _loader_fragment__WEBPACK_IMPORTED_MODULE_3__.ElementaryStreamTypes.AUDIO);
    }
    if (!videoCodec) {
      videoCodec = getParsedTrackCodec(initData.video, _loader_fragment__WEBPACK_IMPORTED_MODULE_3__.ElementaryStreamTypes.VIDEO);
    }
    var tracks = {};
    if (initData.audio && initData.video) {
      tracks.audiovideo = {
        container: 'video/mp4',
        codec: audioCodec + ',' + videoCodec,
        initSegment: initSegment,
        id: 'main'
      };
    } else if (initData.audio) {
      tracks.audio = {
        container: 'audio/mp4',
        codec: audioCodec,
        initSegment: initSegment,
        id: 'audio'
      };
    } else if (initData.video) {
      tracks.video = {
        container: 'video/mp4',
        codec: videoCodec,
        initSegment: initSegment,
        id: 'main'
      };
    } else {
      _utils_logger__WEBPACK_IMPORTED_MODULE_4__.logger.warn('[passthrough-remuxer.ts]: initSegment does not contain moov or trak boxes.');
    }
    this.initTracks = tracks;
  };
  _proto.remux = function remux(audioTrack, videoTrack, id3Track, textTrack, timeOffset) {
    var _this$initPTS;
    var initPTS = this.initPTS,
      lastEndTime = this.lastEndTime;
    var result = {
      audio: undefined,
      video: undefined,
      text: textTrack,
      id3: id3Track,
      initSegment: undefined
    };

    // If we haven't yet set a lastEndDTS, or it was reset, set it to the provided timeOffset. We want to use the
    // lastEndDTS over timeOffset whenever possible; during progressive playback, the media source will not update
    // the media duration (which is what timeOffset is provided as) before we need to process the next chunk.
    if (!(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(lastEndTime)) {
      lastEndTime = this.lastEndTime = timeOffset || 0;
    }

    // The binary segment data is added to the videoTrack in the mp4demuxer. We don't check to see if the data is only
    // audio or video (or both); adding it to video was an arbitrary choice.
    var data = videoTrack.samples;
    if (!data || !data.length) {
      return result;
    }
    var initSegment = {
      initPTS: undefined,
      timescale: 1
    };
    var initData = this.initData;
    if (!initData || !initData.length) {
      this.generateInitSegment(data);
      initData = this.initData;
    }
    if (!initData || !initData.length) {
      // We can't remux if the initSegment could not be generated
      _utils_logger__WEBPACK_IMPORTED_MODULE_4__.logger.warn('[passthrough-remuxer.ts]: Failed to generate initSegment.');
      return result;
    }
    if (this.emitInitSegment) {
      initSegment.tracks = this.initTracks;
      this.emitInitSegment = false;
    }
    var startDTS = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.getStartDTS)(initData, data);
    if (!(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(initPTS)) {
      this.initPTS = initSegment.initPTS = initPTS = startDTS - timeOffset;
    }
    var duration = (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.getDuration)(data, initData);
    var startTime = audioTrack ? startDTS - initPTS : lastEndTime;
    var endTime = startTime + duration;
    (0,_utils_mp4_tools__WEBPACK_IMPORTED_MODULE_2__.offsetStartDTS)(initData, data, initPTS);
    if (duration > 0) {
      this.lastEndTime = endTime;
    } else {
      _utils_logger__WEBPACK_IMPORTED_MODULE_4__.logger.warn('Duration parsed from mp4 should be greater than zero');
      this.resetNextTimestamp();
    }
    var hasAudio = !!initData.audio;
    var hasVideo = !!initData.video;
    var type = '';
    if (hasAudio) {
      type += 'audio';
    }
    if (hasVideo) {
      type += 'video';
    }
    var track = {
      data1: data,
      startPTS: startTime,
      startDTS: startTime,
      endPTS: endTime,
      endDTS: endTime,
      type: type,
      hasAudio: hasAudio,
      hasVideo: hasVideo,
      nb: 1,
      dropped: 0
    };
    result.audio = track.type === 'audio' ? track : undefined;
    result.video = track.type !== 'audio' ? track : undefined;
    result.initSegment = initSegment;
    var initPtsNum = (_this$initPTS = this.initPTS) != null ? _this$initPTS : 0;
    result.id3 = (0,_mp4_remuxer__WEBPACK_IMPORTED_MODULE_1__.flushTextTrackMetadataCueSamples)(id3Track, timeOffset, initPtsNum, initPtsNum);
    if (textTrack.samples.length) {
      result.text = (0,_mp4_remuxer__WEBPACK_IMPORTED_MODULE_1__.flushTextTrackUserdataCueSamples)(textTrack, timeOffset, initPtsNum);
    }
    return result;
  };
  return PassThroughRemuxer;
}();
function getParsedTrackCodec(track, type) {
  var parsedCodec = track === null || track === void 0 ? void 0 : track.codec;
  if (parsedCodec && parsedCodec.length > 4) {
    return parsedCodec;
  }
  // Since mp4-tools cannot parse full codec string (see 'TODO: Parse codec details'... in mp4-tools)
  // Provide defaults based on codec type
  // This allows for some playback of some fmp4 playlists without CODECS defined in manifest
  if (parsedCodec === 'hvc1' || parsedCodec === 'hev1') {
    return 'hvc1.1.c.L120.90';
  }
  if (parsedCodec === 'av01') {
    return 'av01.0.04M.08';
  }
  if (parsedCodec === 'avc1' || type === _loader_fragment__WEBPACK_IMPORTED_MODULE_3__.ElementaryStreamTypes.VIDEO) {
    return 'avc1.42e01e';
  }
  return 'mp4a.40.5';
}
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (PassThroughRemuxer);

/***/ }),

/***/ "./src/task-loop.ts":
/*!**************************!*\
  !*** ./src/task-loop.ts ***!
  \**************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ TaskLoop)
/* harmony export */ });
/**
 * Sub-class specialization of EventHandler base class.
 *
 * TaskLoop allows to schedule a task function being called (optionnaly repeatedly) on the main loop,
 * scheduled asynchroneously, avoiding recursive calls in the same tick.
 *
 * The task itself is implemented in `doTick`. It can be requested and called for single execution
 * using the `tick` method.
 *
 * It will be assured that the task execution method (`tick`) only gets called once per main loop "tick",
 * no matter how often it gets requested for execution. Execution in further ticks will be scheduled accordingly.
 *
 * If further execution requests have already been scheduled on the next tick, it can be checked with `hasNextTick`,
 * and cancelled with `clearNextTick`.
 *
 * The task can be scheduled as an interval repeatedly with a period as parameter (see `setInterval`, `clearInterval`).
 *
 * Sub-classes need to implement the `doTick` method which will effectively have the task execution routine.
 *
 * Further explanations:
 *
 * The baseclass has a `tick` method that will schedule the doTick call. It may be called synchroneously
 * only for a stack-depth of one. On re-entrant calls, sub-sequent calls are scheduled for next main loop ticks.
 *
 * When the task execution (`tick` method) is called in re-entrant way this is detected and
 * we are limiting the task execution per call stack to exactly one, but scheduling/post-poning further
 * task processing on the next main loop iteration (also known as "next tick" in the Node/JS runtime lingo).
 */
var TaskLoop = /*#__PURE__*/function () {
  function TaskLoop() {
    this._boundTick = void 0;
    this._tickTimer = null;
    this._tickInterval = null;
    this._tickCallCount = 0;
    this._boundTick = this.tick.bind(this);
  }
  var _proto = TaskLoop.prototype;
  _proto.destroy = function destroy() {
    this.onHandlerDestroying();
    this.onHandlerDestroyed();
  };
  _proto.onHandlerDestroying = function onHandlerDestroying() {
    // clear all timers before unregistering from event bus
    this.clearNextTick();
    this.clearInterval();
  };
  _proto.onHandlerDestroyed = function onHandlerDestroyed() {}

  /**
   * @returns {boolean}
   */;
  _proto.hasInterval = function hasInterval() {
    return !!this._tickInterval;
  }

  /**
   * @returns {boolean}
   */;
  _proto.hasNextTick = function hasNextTick() {
    return !!this._tickTimer;
  }

  /**
   * @param {number} millis Interval time (ms)
   * @returns {boolean} True when interval has been scheduled, false when already scheduled (no effect)
   */;
  _proto.setInterval = function setInterval(millis) {
    if (!this._tickInterval) {
      this._tickInterval = self.setInterval(this._boundTick, millis);
      return true;
    }
    return false;
  }

  /**
   * @returns {boolean} True when interval was cleared, false when none was set (no effect)
   */;
  _proto.clearInterval = function clearInterval() {
    if (this._tickInterval) {
      self.clearInterval(this._tickInterval);
      this._tickInterval = null;
      return true;
    }
    return false;
  }

  /**
   * @returns {boolean} True when timeout was cleared, false when none was set (no effect)
   */;
  _proto.clearNextTick = function clearNextTick() {
    if (this._tickTimer) {
      self.clearTimeout(this._tickTimer);
      this._tickTimer = null;
      return true;
    }
    return false;
  }

  /**
   * Will call the subclass doTick implementation in this main loop tick
   * or in the next one (via setTimeout(,0)) in case it has already been called
   * in this tick (in case this is a re-entrant call).
   */;
  _proto.tick = function tick() {
    this._tickCallCount++;
    if (this._tickCallCount === 1) {
      this.doTick();
      // re-entrant call to tick from previous doTick call stack
      // -> schedule a call on the next main loop iteration to process this task processing request
      if (this._tickCallCount > 1) {
        // make sure only one timer exists at any time at max
        this.tickImmediate();
      }
      this._tickCallCount = 0;
    }
  };
  _proto.tickImmediate = function tickImmediate() {
    this.clearNextTick();
    this._tickTimer = self.setTimeout(this._boundTick, 0);
  }

  /**
   * For subclass to implement task logic
   * @abstract
   */;
  _proto.doTick = function doTick() {};
  return TaskLoop;
}();


/***/ }),

/***/ "./src/types/cmcd.ts":
/*!***************************!*\
  !*** ./src/types/cmcd.ts ***!
  \***************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "CMCDObjectType": () => (/* binding */ CMCDObjectType),
/* harmony export */   "CMCDStreamType": () => (/* binding */ CMCDStreamType),
/* harmony export */   "CMCDStreamingFormat": () => (/* binding */ CMCDStreamingFormat),
/* harmony export */   "CMCDVersion": () => (/* binding */ CMCDVersion)
/* harmony export */ });
/**
 * CMCD spec version
 */
var CMCDVersion = 1;

/**
 * CMCD Object Type
 */
var CMCDObjectType;

/**
 * CMCD Streaming Format
 */
(function (CMCDObjectType) {
  CMCDObjectType["MANIFEST"] = "m";
  CMCDObjectType["AUDIO"] = "a";
  CMCDObjectType["VIDEO"] = "v";
  CMCDObjectType["MUXED"] = "av";
  CMCDObjectType["INIT"] = "i";
  CMCDObjectType["CAPTION"] = "c";
  CMCDObjectType["TIMED_TEXT"] = "tt";
  CMCDObjectType["KEY"] = "k";
  CMCDObjectType["OTHER"] = "o";
})(CMCDObjectType || (CMCDObjectType = {}));
var CMCDStreamingFormat;

/**
 * CMCD Streaming Type
 */
(function (CMCDStreamingFormat) {
  CMCDStreamingFormat["DASH"] = "d";
  CMCDStreamingFormat["HLS"] = "h";
  CMCDStreamingFormat["SMOOTH"] = "s";
  CMCDStreamingFormat["OTHER"] = "o";
})(CMCDStreamingFormat || (CMCDStreamingFormat = {}));
var CMCDStreamType;

/**
 * CMCD Headers
 */
(function (CMCDStreamType) {
  CMCDStreamType["VOD"] = "v";
  CMCDStreamType["LIVE"] = "l";
})(CMCDStreamType || (CMCDStreamType = {}));

/***/ }),

/***/ "./src/types/demuxer.ts":
/*!******************************!*\
  !*** ./src/types/demuxer.ts ***!
  \******************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "MetadataSchema": () => (/* binding */ MetadataSchema)
/* harmony export */ });
var MetadataSchema;
(function (MetadataSchema) {
  MetadataSchema["audioId3"] = "org.id3";
  MetadataSchema["dateRange"] = "com.apple.quicktime.HLS";
  MetadataSchema["emsg"] = "https://aomedia.org/emsg/ID3";
})(MetadataSchema || (MetadataSchema = {}));

/***/ }),

/***/ "./src/types/level.ts":
/*!****************************!*\
  !*** ./src/types/level.ts ***!
  \****************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "HdcpLevels": () => (/* binding */ HdcpLevels),
/* harmony export */   "HlsSkip": () => (/* binding */ HlsSkip),
/* harmony export */   "HlsUrlParameters": () => (/* binding */ HlsUrlParameters),
/* harmony export */   "Level": () => (/* binding */ Level),
/* harmony export */   "getSkipValue": () => (/* binding */ getSkipValue)
/* harmony export */ });
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
var HdcpLevels = ['NONE', 'TYPE-0', 'TYPE-1', 'TYPE-2', null];
var HlsSkip;
(function (HlsSkip) {
  HlsSkip["No"] = "";
  HlsSkip["Yes"] = "YES";
  HlsSkip["v2"] = "v2";
})(HlsSkip || (HlsSkip = {}));
function getSkipValue(details, msn) {
  var canSkipUntil = details.canSkipUntil,
    canSkipDateRanges = details.canSkipDateRanges,
    endSN = details.endSN;
  var snChangeGoal = msn !== undefined ? msn - endSN : 0;
  if (canSkipUntil && snChangeGoal < canSkipUntil) {
    if (canSkipDateRanges) {
      return HlsSkip.v2;
    }
    return HlsSkip.Yes;
  }
  return HlsSkip.No;
}
var HlsUrlParameters = /*#__PURE__*/function () {
  function HlsUrlParameters(msn, part, skip) {
    this.msn = void 0;
    this.part = void 0;
    this.skip = void 0;
    this.msn = msn;
    this.part = part;
    this.skip = skip;
  }
  var _proto = HlsUrlParameters.prototype;
  _proto.addDirectives = function addDirectives(uri) {
    var url = new self.URL(uri);
    if (this.msn !== undefined) {
      url.searchParams.set('_HLS_msn', this.msn.toString());
    }
    if (this.part !== undefined) {
      url.searchParams.set('_HLS_part', this.part.toString());
    }
    if (this.skip) {
      url.searchParams.set('_HLS_skip', this.skip);
    }
    return url.href;
  };
  return HlsUrlParameters;
}();
var Level = /*#__PURE__*/function () {
  function Level(data) {
    this.attrs = void 0;
    this.audioCodec = void 0;
    this.bitrate = void 0;
    this.codecSet = void 0;
    this.height = void 0;
    this.id = void 0;
    this.name = void 0;
    this.videoCodec = void 0;
    this.width = void 0;
    this.unknownCodecs = void 0;
    this.audioGroupIds = void 0;
    this.details = void 0;
    this.fragmentError = 0;
    this.loadError = 0;
    this.loaded = void 0;
    this.realBitrate = 0;
    this.textGroupIds = void 0;
    this.url = void 0;
    this._urlId = 0;
    this.url = [data.url];
    this.attrs = data.attrs;
    this.bitrate = data.bitrate;
    if (data.details) {
      this.details = data.details;
    }
    this.id = data.id || 0;
    this.name = data.name;
    this.width = data.width || 0;
    this.height = data.height || 0;
    this.audioCodec = data.audioCodec;
    this.videoCodec = data.videoCodec;
    this.unknownCodecs = data.unknownCodecs;
    this.codecSet = [data.videoCodec, data.audioCodec].filter(function (c) {
      return c;
    }).join(',').replace(/\.[^.,]+/g, '');
  }
  _createClass(Level, [{
    key: "maxBitrate",
    get: function get() {
      return Math.max(this.realBitrate, this.bitrate);
    }
  }, {
    key: "uri",
    get: function get() {
      return this.url[this._urlId] || '';
    }
  }, {
    key: "urlId",
    get: function get() {
      return this._urlId;
    },
    set: function set(value) {
      var newValue = value % this.url.length;
      if (this._urlId !== newValue) {
        this.details = undefined;
        this._urlId = newValue;
      }
    }
  }]);
  return Level;
}();

/***/ }),

/***/ "./src/types/loader.ts":
/*!*****************************!*\
  !*** ./src/types/loader.ts ***!
  \*****************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "PlaylistContextType": () => (/* binding */ PlaylistContextType),
/* harmony export */   "PlaylistLevelType": () => (/* binding */ PlaylistLevelType)
/* harmony export */ });
var PlaylistContextType;
(function (PlaylistContextType) {
  PlaylistContextType["MANIFEST"] = "manifest";
  PlaylistContextType["LEVEL"] = "level";
  PlaylistContextType["AUDIO_TRACK"] = "audioTrack";
  PlaylistContextType["SUBTITLE_TRACK"] = "subtitleTrack";
})(PlaylistContextType || (PlaylistContextType = {}));
var PlaylistLevelType;
(function (PlaylistLevelType) {
  PlaylistLevelType["MAIN"] = "main";
  PlaylistLevelType["AUDIO"] = "audio";
  PlaylistLevelType["SUBTITLE"] = "subtitle";
})(PlaylistLevelType || (PlaylistLevelType = {}));

/***/ }),

/***/ "./src/types/transmuxer.ts":
/*!*********************************!*\
  !*** ./src/types/transmuxer.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "ChunkMetadata": () => (/* binding */ ChunkMetadata)
/* harmony export */ });
var ChunkMetadata = function ChunkMetadata(level, sn, id, size, part, partial) {
  if (size === void 0) {
    size = 0;
  }
  if (part === void 0) {
    part = -1;
  }
  if (partial === void 0) {
    partial = false;
  }
  this.level = void 0;
  this.sn = void 0;
  this.part = void 0;
  this.id = void 0;
  this.size = void 0;
  this.partial = void 0;
  this.transmuxing = getNewPerformanceTiming();
  this.buffering = {
    audio: getNewPerformanceTiming(),
    video: getNewPerformanceTiming(),
    audiovideo: getNewPerformanceTiming()
  };
  this.level = level;
  this.sn = sn;
  this.id = id;
  this.size = size;
  this.part = part;
  this.partial = partial;
};
function getNewPerformanceTiming() {
  return {
    start: 0,
    executeStart: 0,
    executeEnd: 0,
    end: 0
  };
}

/***/ }),

/***/ "./src/utils/attr-list.ts":
/*!********************************!*\
  !*** ./src/utils/attr-list.ts ***!
  \********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "AttrList": () => (/* binding */ AttrList)
/* harmony export */ });
var DECIMAL_RESOLUTION_REGEX = /^(\d+)x(\d+)$/; // eslint-disable-line no-useless-escape
var ATTR_LIST_REGEX = /\s*(.+?)\s*=((?:\".*?\")|.*?)(?:,|$)/g; // eslint-disable-line no-useless-escape

// adapted from https://github.com/kanongil/node-m3u8parse/blob/master/attrlist.js
var AttrList = /*#__PURE__*/function () {
  function AttrList(attrs) {
    if (typeof attrs === 'string') {
      attrs = AttrList.parseAttrList(attrs);
    }
    for (var attr in attrs) {
      if (attrs.hasOwnProperty(attr)) {
        this[attr] = attrs[attr];
      }
    }
  }
  var _proto = AttrList.prototype;
  _proto.decimalInteger = function decimalInteger(attrName) {
    var intValue = parseInt(this[attrName], 10);
    if (intValue > Number.MAX_SAFE_INTEGER) {
      return Infinity;
    }
    return intValue;
  };
  _proto.hexadecimalInteger = function hexadecimalInteger(attrName) {
    if (this[attrName]) {
      var stringValue = (this[attrName] || '0x').slice(2);
      stringValue = (stringValue.length & 1 ? '0' : '') + stringValue;
      var value = new Uint8Array(stringValue.length / 2);
      for (var i = 0; i < stringValue.length / 2; i++) {
        value[i] = parseInt(stringValue.slice(i * 2, i * 2 + 2), 16);
      }
      return value;
    } else {
      return null;
    }
  };
  _proto.hexadecimalIntegerAsNumber = function hexadecimalIntegerAsNumber(attrName) {
    var intValue = parseInt(this[attrName], 16);
    if (intValue > Number.MAX_SAFE_INTEGER) {
      return Infinity;
    }
    return intValue;
  };
  _proto.decimalFloatingPoint = function decimalFloatingPoint(attrName) {
    return parseFloat(this[attrName]);
  };
  _proto.optionalFloat = function optionalFloat(attrName, defaultValue) {
    var value = this[attrName];
    return value ? parseFloat(value) : defaultValue;
  };
  _proto.enumeratedString = function enumeratedString(attrName) {
    return this[attrName];
  };
  _proto.bool = function bool(attrName) {
    return this[attrName] === 'YES';
  };
  _proto.decimalResolution = function decimalResolution(attrName) {
    var res = DECIMAL_RESOLUTION_REGEX.exec(this[attrName]);
    if (res === null) {
      return undefined;
    }
    return {
      width: parseInt(res[1], 10),
      height: parseInt(res[2], 10)
    };
  };
  AttrList.parseAttrList = function parseAttrList(input) {
    var match;
    var attrs = {};
    var quote = '"';
    ATTR_LIST_REGEX.lastIndex = 0;
    while ((match = ATTR_LIST_REGEX.exec(input)) !== null) {
      var value = match[2];
      if (value.indexOf(quote) === 0 && value.lastIndexOf(quote) === value.length - 1) {
        value = value.slice(1, -1);
      }
      attrs[match[1]] = value;
    }
    return attrs;
  };
  return AttrList;
}();

/***/ }),

/***/ "./src/utils/binary-search.ts":
/*!************************************!*\
  !*** ./src/utils/binary-search.ts ***!
  \************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
var BinarySearch = {
  /**
   * Searches for an item in an array which matches a certain condition.
   * This requires the condition to only match one item in the array,
   * and for the array to be ordered.
   *
   * @param {Array<T>} list The array to search.
   * @param {BinarySearchComparison<T>} comparisonFn
   *      Called and provided a candidate item as the first argument.
   *      Should return:
   *          > -1 if the item should be located at a lower index than the provided item.
   *          > 1 if the item should be located at a higher index than the provided item.
   *          > 0 if the item is the item you're looking for.
   *
   * @return {T | null} The object if it is found or null otherwise.
   */
  search: function search(list, comparisonFn) {
    var minIndex = 0;
    var maxIndex = list.length - 1;
    var currentIndex = null;
    var currentElement = null;
    while (minIndex <= maxIndex) {
      currentIndex = (minIndex + maxIndex) / 2 | 0;
      currentElement = list[currentIndex];
      var comparisonResult = comparisonFn(currentElement);
      if (comparisonResult > 0) {
        minIndex = currentIndex + 1;
      } else if (comparisonResult < 0) {
        maxIndex = currentIndex - 1;
      } else {
        return currentElement;
      }
    }
    return null;
  }
};
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (BinarySearch);

/***/ }),

/***/ "./src/utils/buffer-helper.ts":
/*!************************************!*\
  !*** ./src/utils/buffer-helper.ts ***!
  \************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "BufferHelper": () => (/* binding */ BufferHelper)
/* harmony export */ });
/* harmony import */ var _logger__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./logger */ "./src/utils/logger.ts");
/**
 * @module BufferHelper
 *
 * Providing methods dealing with buffer length retrieval for example.
 *
 * In general, a helper around HTML5 MediaElement TimeRanges gathered from `buffered` property.
 *
 * Also @see https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/buffered
 */


var noopBuffered = {
  length: 0,
  start: function start() {
    return 0;
  },
  end: function end() {
    return 0;
  }
};
var BufferHelper = /*#__PURE__*/function () {
  function BufferHelper() {}
  /**
   * Return true if `media`'s buffered include `position`
   * @param {Bufferable} media
   * @param {number} position
   * @returns {boolean}
   */
  BufferHelper.isBuffered = function isBuffered(media, position) {
    try {
      if (media) {
        var buffered = BufferHelper.getBuffered(media);
        for (var i = 0; i < buffered.length; i++) {
          if (position >= buffered.start(i) && position <= buffered.end(i)) {
            return true;
          }
        }
      }
    } catch (error) {
      // this is to catch
      // InvalidStateError: Failed to read the 'buffered' property from 'SourceBuffer':
      // This SourceBuffer has been removed from the parent media source
    }
    return false;
  };
  BufferHelper.bufferInfo = function bufferInfo(media, pos, maxHoleDuration) {
    try {
      if (media) {
        var vbuffered = BufferHelper.getBuffered(media);
        var buffered = [];
        var i;
        for (i = 0; i < vbuffered.length; i++) {
          buffered.push({
            start: vbuffered.start(i),
            end: vbuffered.end(i)
          });
        }
        return this.bufferedInfo(buffered, pos, maxHoleDuration);
      }
    } catch (error) {
      // this is to catch
      // InvalidStateError: Failed to read the 'buffered' property from 'SourceBuffer':
      // This SourceBuffer has been removed from the parent media source
    }
    return {
      len: 0,
      start: pos,
      end: pos,
      nextStart: undefined
    };
  };
  BufferHelper.bufferedInfo = function bufferedInfo(buffered, pos, maxHoleDuration) {
    pos = Math.max(0, pos);
    // sort on buffer.start/smaller end (IE does not always return sorted buffered range)
    buffered.sort(function (a, b) {
      var diff = a.start - b.start;
      if (diff) {
        return diff;
      } else {
        return b.end - a.end;
      }
    });
    var buffered2 = [];
    if (maxHoleDuration) {
      // there might be some small holes between buffer time range
      // consider that holes smaller than maxHoleDuration are irrelevant and build another
      // buffer time range representations that discards those holes
      for (var i = 0; i < buffered.length; i++) {
        var buf2len = buffered2.length;
        if (buf2len) {
          var buf2end = buffered2[buf2len - 1].end;
          // if small hole (value between 0 or maxHoleDuration ) or overlapping (negative)
          if (buffered[i].start - buf2end < maxHoleDuration) {
            // merge overlapping time ranges
            // update lastRange.end only if smaller than item.end
            // e.g.  [ 1, 15] with  [ 2,8] => [ 1,15] (no need to modify lastRange.end)
            // whereas [ 1, 8] with  [ 2,15] => [ 1,15] ( lastRange should switch from [1,8] to [1,15])
            if (buffered[i].end > buf2end) {
              buffered2[buf2len - 1].end = buffered[i].end;
            }
          } else {
            // big hole
            buffered2.push(buffered[i]);
          }
        } else {
          // first value
          buffered2.push(buffered[i]);
        }
      }
    } else {
      buffered2 = buffered;
    }
    var bufferLen = 0;

    // bufferStartNext can possibly be undefined based on the conditional logic below
    var bufferStartNext;

    // bufferStart and bufferEnd are buffer boundaries around current video position
    var bufferStart = pos;
    var bufferEnd = pos;
    for (var _i = 0; _i < buffered2.length; _i++) {
      var start = buffered2[_i].start;
      var end = buffered2[_i].end;
      // logger.log('buf start/end:' + buffered.start(i) + '/' + buffered.end(i));
      if (pos + maxHoleDuration >= start && pos < end) {
        // play position is inside this buffer TimeRange, retrieve end of buffer position and buffer length
        bufferStart = start;
        bufferEnd = end;
        bufferLen = bufferEnd - pos;
      } else if (pos + maxHoleDuration < start) {
        bufferStartNext = start;
        break;
      }
    }
    return {
      len: bufferLen,
      start: bufferStart || 0,
      end: bufferEnd || 0,
      nextStart: bufferStartNext
    };
  }

  /**
   * Safe method to get buffered property.
   * SourceBuffer.buffered may throw if SourceBuffer is removed from it's MediaSource
   */;
  BufferHelper.getBuffered = function getBuffered(media) {
    try {
      return media.buffered;
    } catch (e) {
      _logger__WEBPACK_IMPORTED_MODULE_0__.logger.log('failed to get media.buffered', e);
      return noopBuffered;
    }
  };
  return BufferHelper;
}();

/***/ }),

/***/ "./src/utils/cea-608-parser.ts":
/*!*************************************!*\
  !*** ./src/utils/cea-608-parser.ts ***!
  \*************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "CaptionScreen": () => (/* binding */ CaptionScreen),
/* harmony export */   "Row": () => (/* binding */ Row),
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");


/**
 *
 * This code was ported from the dash.js project at:
 *   https://github.com/Dash-Industry-Forum/dash.js/blob/development/externals/cea608-parser.js
 *   https://github.com/Dash-Industry-Forum/dash.js/commit/8269b26a761e0853bb21d78780ed945144ecdd4d#diff-71bc295a2d6b6b7093a1d3290d53a4b2
 *
 * The original copyright appears below:
 *
 * The copyright in this software is being made available under the BSD License,
 * included below. This software may be subject to other third party and contributor
 * rights, including patent rights, and no such rights are granted under this license.
 *
 * Copyright (c) 2015-2016, DASH Industry Forum.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *  1. Redistributions of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation and/or
 *  other materials provided with the distribution.
 *  2. Neither the name of Dash Industry Forum nor the names of its
 *  contributors may be used to endorse or promote products derived from this software
 *  without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY
 *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */
/**
 *  Exceptions from regular ASCII. CodePoints are mapped to UTF-16 codes
 */

var specialCea608CharsCodes = {
  0x2a: 0xe1,
  // lowercase a, acute accent
  0x5c: 0xe9,
  // lowercase e, acute accent
  0x5e: 0xed,
  // lowercase i, acute accent
  0x5f: 0xf3,
  // lowercase o, acute accent
  0x60: 0xfa,
  // lowercase u, acute accent
  0x7b: 0xe7,
  // lowercase c with cedilla
  0x7c: 0xf7,
  // division symbol
  0x7d: 0xd1,
  // uppercase N tilde
  0x7e: 0xf1,
  // lowercase n tilde
  0x7f: 0x2588,
  // Full block
  // THIS BLOCK INCLUDES THE 16 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
  // THAT COME FROM HI BYTE=0x11 AND LOW BETWEEN 0x30 AND 0x3F
  // THIS MEANS THAT \x50 MUST BE ADDED TO THE VALUES
  0x80: 0xae,
  // Registered symbol (R)
  0x81: 0xb0,
  // degree sign
  0x82: 0xbd,
  // 1/2 symbol
  0x83: 0xbf,
  // Inverted (open) question mark
  0x84: 0x2122,
  // Trademark symbol (TM)
  0x85: 0xa2,
  // Cents symbol
  0x86: 0xa3,
  // Pounds sterling
  0x87: 0x266a,
  // Music 8'th note
  0x88: 0xe0,
  // lowercase a, grave accent
  0x89: 0x20,
  // transparent space (regular)
  0x8a: 0xe8,
  // lowercase e, grave accent
  0x8b: 0xe2,
  // lowercase a, circumflex accent
  0x8c: 0xea,
  // lowercase e, circumflex accent
  0x8d: 0xee,
  // lowercase i, circumflex accent
  0x8e: 0xf4,
  // lowercase o, circumflex accent
  0x8f: 0xfb,
  // lowercase u, circumflex accent
  // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
  // THAT COME FROM HI BYTE=0x12 AND LOW BETWEEN 0x20 AND 0x3F
  0x90: 0xc1,
  // capital letter A with acute
  0x91: 0xc9,
  // capital letter E with acute
  0x92: 0xd3,
  // capital letter O with acute
  0x93: 0xda,
  // capital letter U with acute
  0x94: 0xdc,
  // capital letter U with diaresis
  0x95: 0xfc,
  // lowercase letter U with diaeresis
  0x96: 0x2018,
  // opening single quote
  0x97: 0xa1,
  // inverted exclamation mark
  0x98: 0x2a,
  // asterisk
  0x99: 0x2019,
  // closing single quote
  0x9a: 0x2501,
  // box drawings heavy horizontal
  0x9b: 0xa9,
  // copyright sign
  0x9c: 0x2120,
  // Service mark
  0x9d: 0x2022,
  // (round) bullet
  0x9e: 0x201c,
  // Left double quotation mark
  0x9f: 0x201d,
  // Right double quotation mark
  0xa0: 0xc0,
  // uppercase A, grave accent
  0xa1: 0xc2,
  // uppercase A, circumflex
  0xa2: 0xc7,
  // uppercase C with cedilla
  0xa3: 0xc8,
  // uppercase E, grave accent
  0xa4: 0xca,
  // uppercase E, circumflex
  0xa5: 0xcb,
  // capital letter E with diaresis
  0xa6: 0xeb,
  // lowercase letter e with diaresis
  0xa7: 0xce,
  // uppercase I, circumflex
  0xa8: 0xcf,
  // uppercase I, with diaresis
  0xa9: 0xef,
  // lowercase i, with diaresis
  0xaa: 0xd4,
  // uppercase O, circumflex
  0xab: 0xd9,
  // uppercase U, grave accent
  0xac: 0xf9,
  // lowercase u, grave accent
  0xad: 0xdb,
  // uppercase U, circumflex
  0xae: 0xab,
  // left-pointing double angle quotation mark
  0xaf: 0xbb,
  // right-pointing double angle quotation mark
  // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
  // THAT COME FROM HI BYTE=0x13 AND LOW BETWEEN 0x20 AND 0x3F
  0xb0: 0xc3,
  // Uppercase A, tilde
  0xb1: 0xe3,
  // Lowercase a, tilde
  0xb2: 0xcd,
  // Uppercase I, acute accent
  0xb3: 0xcc,
  // Uppercase I, grave accent
  0xb4: 0xec,
  // Lowercase i, grave accent
  0xb5: 0xd2,
  // Uppercase O, grave accent
  0xb6: 0xf2,
  // Lowercase o, grave accent
  0xb7: 0xd5,
  // Uppercase O, tilde
  0xb8: 0xf5,
  // Lowercase o, tilde
  0xb9: 0x7b,
  // Open curly brace
  0xba: 0x7d,
  // Closing curly brace
  0xbb: 0x5c,
  // Backslash
  0xbc: 0x5e,
  // Caret
  0xbd: 0x5f,
  // Underscore
  0xbe: 0x7c,
  // Pipe (vertical line)
  0xbf: 0x223c,
  // Tilde operator
  0xc0: 0xc4,
  // Uppercase A, umlaut
  0xc1: 0xe4,
  // Lowercase A, umlaut
  0xc2: 0xd6,
  // Uppercase O, umlaut
  0xc3: 0xf6,
  // Lowercase o, umlaut
  0xc4: 0xdf,
  // Esszett (sharp S)
  0xc5: 0xa5,
  // Yen symbol
  0xc6: 0xa4,
  // Generic currency sign
  0xc7: 0x2503,
  // Box drawings heavy vertical
  0xc8: 0xc5,
  // Uppercase A, ring
  0xc9: 0xe5,
  // Lowercase A, ring
  0xca: 0xd8,
  // Uppercase O, stroke
  0xcb: 0xf8,
  // Lowercase o, strok
  0xcc: 0x250f,
  // Box drawings heavy down and right
  0xcd: 0x2513,
  // Box drawings heavy down and left
  0xce: 0x2517,
  // Box drawings heavy up and right
  0xcf: 0x251b // Box drawings heavy up and left
};

/**
 * Utils
 */
var getCharForByte = function getCharForByte(_byte) {
  var charCode = _byte;
  if (specialCea608CharsCodes.hasOwnProperty(_byte)) {
    charCode = specialCea608CharsCodes[_byte];
  }
  return String.fromCharCode(charCode);
};
var NR_ROWS = 15;
var NR_COLS = 100;
// Tables to look up row from PAC data
var rowsLowCh1 = {
  0x11: 1,
  0x12: 3,
  0x15: 5,
  0x16: 7,
  0x17: 9,
  0x10: 11,
  0x13: 12,
  0x14: 14
};
var rowsHighCh1 = {
  0x11: 2,
  0x12: 4,
  0x15: 6,
  0x16: 8,
  0x17: 10,
  0x13: 13,
  0x14: 15
};
var rowsLowCh2 = {
  0x19: 1,
  0x1a: 3,
  0x1d: 5,
  0x1e: 7,
  0x1f: 9,
  0x18: 11,
  0x1b: 12,
  0x1c: 14
};
var rowsHighCh2 = {
  0x19: 2,
  0x1a: 4,
  0x1d: 6,
  0x1e: 8,
  0x1f: 10,
  0x1b: 13,
  0x1c: 15
};
var backgroundColors = ['white', 'green', 'blue', 'cyan', 'red', 'yellow', 'magenta', 'black', 'transparent'];
var VerboseLevel;
(function (VerboseLevel) {
  VerboseLevel[VerboseLevel["ERROR"] = 0] = "ERROR";
  VerboseLevel[VerboseLevel["TEXT"] = 1] = "TEXT";
  VerboseLevel[VerboseLevel["WARNING"] = 2] = "WARNING";
  VerboseLevel[VerboseLevel["INFO"] = 2] = "INFO";
  VerboseLevel[VerboseLevel["DEBUG"] = 3] = "DEBUG";
  VerboseLevel[VerboseLevel["DATA"] = 3] = "DATA";
})(VerboseLevel || (VerboseLevel = {}));
var CaptionsLogger = /*#__PURE__*/function () {
  function CaptionsLogger() {
    this.time = null;
    this.verboseLevel = VerboseLevel.ERROR;
  }
  var _proto = CaptionsLogger.prototype;
  _proto.log = function log(severity, msg) {
    if (this.verboseLevel >= severity) {
      var m = typeof msg === 'function' ? msg() : msg;
      _utils_logger__WEBPACK_IMPORTED_MODULE_0__.logger.log(this.time + " [" + severity + "] " + m);
    }
  };
  return CaptionsLogger;
}();
var numArrayToHexArray = function numArrayToHexArray(numArray) {
  var hexArray = [];
  for (var j = 0; j < numArray.length; j++) {
    hexArray.push(numArray[j].toString(16));
  }
  return hexArray;
};
var PenState = /*#__PURE__*/function () {
  function PenState(foreground, underline, italics, background, flash) {
    this.foreground = void 0;
    this.underline = void 0;
    this.italics = void 0;
    this.background = void 0;
    this.flash = void 0;
    this.foreground = foreground || 'white';
    this.underline = underline || false;
    this.italics = italics || false;
    this.background = background || 'black';
    this.flash = flash || false;
  }
  var _proto2 = PenState.prototype;
  _proto2.reset = function reset() {
    this.foreground = 'white';
    this.underline = false;
    this.italics = false;
    this.background = 'black';
    this.flash = false;
  };
  _proto2.setStyles = function setStyles(styles) {
    var attribs = ['foreground', 'underline', 'italics', 'background', 'flash'];
    for (var i = 0; i < attribs.length; i++) {
      var style = attribs[i];
      if (styles.hasOwnProperty(style)) {
        this[style] = styles[style];
      }
    }
  };
  _proto2.isDefault = function isDefault() {
    return this.foreground === 'white' && !this.underline && !this.italics && this.background === 'black' && !this.flash;
  };
  _proto2.equals = function equals(other) {
    return this.foreground === other.foreground && this.underline === other.underline && this.italics === other.italics && this.background === other.background && this.flash === other.flash;
  };
  _proto2.copy = function copy(newPenState) {
    this.foreground = newPenState.foreground;
    this.underline = newPenState.underline;
    this.italics = newPenState.italics;
    this.background = newPenState.background;
    this.flash = newPenState.flash;
  };
  _proto2.toString = function toString() {
    return 'color=' + this.foreground + ', underline=' + this.underline + ', italics=' + this.italics + ', background=' + this.background + ', flash=' + this.flash;
  };
  return PenState;
}();
/**
 * Unicode character with styling and background.
 * @constructor
 */
var StyledUnicodeChar = /*#__PURE__*/function () {
  function StyledUnicodeChar(uchar, foreground, underline, italics, background, flash) {
    this.uchar = void 0;
    this.penState = void 0;
    this.uchar = uchar || ' '; // unicode character
    this.penState = new PenState(foreground, underline, italics, background, flash);
  }
  var _proto3 = StyledUnicodeChar.prototype;
  _proto3.reset = function reset() {
    this.uchar = ' ';
    this.penState.reset();
  };
  _proto3.setChar = function setChar(uchar, newPenState) {
    this.uchar = uchar;
    this.penState.copy(newPenState);
  };
  _proto3.setPenState = function setPenState(newPenState) {
    this.penState.copy(newPenState);
  };
  _proto3.equals = function equals(other) {
    return this.uchar === other.uchar && this.penState.equals(other.penState);
  };
  _proto3.copy = function copy(newChar) {
    this.uchar = newChar.uchar;
    this.penState.copy(newChar.penState);
  };
  _proto3.isEmpty = function isEmpty() {
    return this.uchar === ' ' && this.penState.isDefault();
  };
  return StyledUnicodeChar;
}();
/**
 * CEA-608 row consisting of NR_COLS instances of StyledUnicodeChar.
 * @constructor
 */
var Row = /*#__PURE__*/function () {
  function Row(logger) {
    this.chars = void 0;
    this.pos = void 0;
    this.currPenState = void 0;
    this.cueStartTime = void 0;
    this.logger = void 0;
    this.chars = [];
    for (var i = 0; i < NR_COLS; i++) {
      this.chars.push(new StyledUnicodeChar());
    }
    this.logger = logger;
    this.pos = 0;
    this.currPenState = new PenState();
  }
  var _proto4 = Row.prototype;
  _proto4.equals = function equals(other) {
    var equal = true;
    for (var i = 0; i < NR_COLS; i++) {
      if (!this.chars[i].equals(other.chars[i])) {
        equal = false;
        break;
      }
    }
    return equal;
  };
  _proto4.copy = function copy(other) {
    for (var i = 0; i < NR_COLS; i++) {
      this.chars[i].copy(other.chars[i]);
    }
  };
  _proto4.isEmpty = function isEmpty() {
    var empty = true;
    for (var i = 0; i < NR_COLS; i++) {
      if (!this.chars[i].isEmpty()) {
        empty = false;
        break;
      }
    }
    return empty;
  }

  /**
   *  Set the cursor to a valid column.
   */;
  _proto4.setCursor = function setCursor(absPos) {
    if (this.pos !== absPos) {
      this.pos = absPos;
    }
    if (this.pos < 0) {
      this.logger.log(VerboseLevel.DEBUG, 'Negative cursor position ' + this.pos);
      this.pos = 0;
    } else if (this.pos > NR_COLS) {
      this.logger.log(VerboseLevel.DEBUG, 'Too large cursor position ' + this.pos);
      this.pos = NR_COLS;
    }
  }

  /**
   * Move the cursor relative to current position.
   */;
  _proto4.moveCursor = function moveCursor(relPos) {
    var newPos = this.pos + relPos;
    if (relPos > 1) {
      for (var i = this.pos + 1; i < newPos + 1; i++) {
        this.chars[i].setPenState(this.currPenState);
      }
    }
    this.setCursor(newPos);
  }

  /**
   * Backspace, move one step back and clear character.
   */;
  _proto4.backSpace = function backSpace() {
    this.moveCursor(-1);
    this.chars[this.pos].setChar(' ', this.currPenState);
  };
  _proto4.insertChar = function insertChar(_byte2) {
    var _this = this;
    if (_byte2 >= 0x90) {
      // Extended char
      this.backSpace();
    }
    var _char = getCharForByte(_byte2);
    if (this.pos >= NR_COLS) {
      this.logger.log(VerboseLevel.ERROR, function () {
        return 'Cannot insert ' + _byte2.toString(16) + ' (' + _char + ') at position ' + _this.pos + '. Skipping it!';
      });
      return;
    }
    this.chars[this.pos].setChar(_char, this.currPenState);
    this.moveCursor(1);
  };
  _proto4.clearFromPos = function clearFromPos(startPos) {
    var i;
    for (i = startPos; i < NR_COLS; i++) {
      this.chars[i].reset();
    }
  };
  _proto4.clear = function clear() {
    this.clearFromPos(0);
    this.pos = 0;
    this.currPenState.reset();
  };
  _proto4.clearToEndOfRow = function clearToEndOfRow() {
    this.clearFromPos(this.pos);
  };
  _proto4.getTextString = function getTextString() {
    var chars = [];
    var empty = true;
    for (var i = 0; i < NR_COLS; i++) {
      var _char2 = this.chars[i].uchar;
      if (_char2 !== ' ') {
        empty = false;
      }
      chars.push(_char2);
    }
    if (empty) {
      return '';
    } else {
      return chars.join('');
    }
  };
  _proto4.setPenStyles = function setPenStyles(styles) {
    this.currPenState.setStyles(styles);
    var currChar = this.chars[this.pos];
    currChar.setPenState(this.currPenState);
  };
  return Row;
}();

/**
 * Keep a CEA-608 screen of 32x15 styled characters
 * @constructor
 */
var CaptionScreen = /*#__PURE__*/function () {
  function CaptionScreen(logger) {
    this.rows = void 0;
    this.currRow = void 0;
    this.nrRollUpRows = void 0;
    this.lastOutputScreen = void 0;
    this.logger = void 0;
    this.rows = [];
    for (var i = 0; i < NR_ROWS; i++) {
      this.rows.push(new Row(logger));
    } // Note that we use zero-based numbering (0-14)

    this.logger = logger;
    this.currRow = NR_ROWS - 1;
    this.nrRollUpRows = null;
    this.lastOutputScreen = null;
    this.reset();
  }
  var _proto5 = CaptionScreen.prototype;
  _proto5.reset = function reset() {
    for (var i = 0; i < NR_ROWS; i++) {
      this.rows[i].clear();
    }
    this.currRow = NR_ROWS - 1;
  };
  _proto5.equals = function equals(other) {
    var equal = true;
    for (var i = 0; i < NR_ROWS; i++) {
      if (!this.rows[i].equals(other.rows[i])) {
        equal = false;
        break;
      }
    }
    return equal;
  };
  _proto5.copy = function copy(other) {
    for (var i = 0; i < NR_ROWS; i++) {
      this.rows[i].copy(other.rows[i]);
    }
  };
  _proto5.isEmpty = function isEmpty() {
    var empty = true;
    for (var i = 0; i < NR_ROWS; i++) {
      if (!this.rows[i].isEmpty()) {
        empty = false;
        break;
      }
    }
    return empty;
  };
  _proto5.backSpace = function backSpace() {
    var row = this.rows[this.currRow];
    row.backSpace();
  };
  _proto5.clearToEndOfRow = function clearToEndOfRow() {
    var row = this.rows[this.currRow];
    row.clearToEndOfRow();
  }

  /**
   * Insert a character (without styling) in the current row.
   */;
  _proto5.insertChar = function insertChar(_char3) {
    var row = this.rows[this.currRow];
    row.insertChar(_char3);
  };
  _proto5.setPen = function setPen(styles) {
    var row = this.rows[this.currRow];
    row.setPenStyles(styles);
  };
  _proto5.moveCursor = function moveCursor(relPos) {
    var row = this.rows[this.currRow];
    row.moveCursor(relPos);
  };
  _proto5.setCursor = function setCursor(absPos) {
    this.logger.log(VerboseLevel.INFO, 'setCursor: ' + absPos);
    var row = this.rows[this.currRow];
    row.setCursor(absPos);
  };
  _proto5.setPAC = function setPAC(pacData) {
    this.logger.log(VerboseLevel.INFO, function () {
      return 'pacData = ' + JSON.stringify(pacData);
    });
    var newRow = pacData.row - 1;
    if (this.nrRollUpRows && newRow < this.nrRollUpRows - 1) {
      newRow = this.nrRollUpRows - 1;
    }

    // Make sure this only affects Roll-up Captions by checking this.nrRollUpRows
    if (this.nrRollUpRows && this.currRow !== newRow) {
      // clear all rows first
      for (var i = 0; i < NR_ROWS; i++) {
        this.rows[i].clear();
      }

      // Copy this.nrRollUpRows rows from lastOutputScreen and place it in the newRow location
      // topRowIndex - the start of rows to copy (inclusive index)
      var topRowIndex = this.currRow + 1 - this.nrRollUpRows;
      // We only copy if the last position was already shown.
      // We use the cueStartTime value to check this.
      var lastOutputScreen = this.lastOutputScreen;
      if (lastOutputScreen) {
        var prevLineTime = lastOutputScreen.rows[topRowIndex].cueStartTime;
        var time = this.logger.time;
        if (prevLineTime && time !== null && prevLineTime < time) {
          for (var _i = 0; _i < this.nrRollUpRows; _i++) {
            this.rows[newRow - this.nrRollUpRows + _i + 1].copy(lastOutputScreen.rows[topRowIndex + _i]);
          }
        }
      }
    }
    this.currRow = newRow;
    var row = this.rows[this.currRow];
    if (pacData.indent !== null) {
      var indent = pacData.indent;
      var prevPos = Math.max(indent - 1, 0);
      row.setCursor(pacData.indent);
      pacData.color = row.chars[prevPos].penState.foreground;
    }
    var styles = {
      foreground: pacData.color,
      underline: pacData.underline,
      italics: pacData.italics,
      background: 'black',
      flash: false
    };
    this.setPen(styles);
  }

  /**
   * Set background/extra foreground, but first do back_space, and then insert space (backwards compatibility).
   */;
  _proto5.setBkgData = function setBkgData(bkgData) {
    this.logger.log(VerboseLevel.INFO, function () {
      return 'bkgData = ' + JSON.stringify(bkgData);
    });
    this.backSpace();
    this.setPen(bkgData);
    this.insertChar(0x20); // Space
  };
  _proto5.setRollUpRows = function setRollUpRows(nrRows) {
    this.nrRollUpRows = nrRows;
  };
  _proto5.rollUp = function rollUp() {
    var _this2 = this;
    if (this.nrRollUpRows === null) {
      this.logger.log(VerboseLevel.DEBUG, 'roll_up but nrRollUpRows not set yet');
      return; // Not properly setup
    }

    this.logger.log(VerboseLevel.TEXT, function () {
      return _this2.getDisplayText();
    });
    var topRowIndex = this.currRow + 1 - this.nrRollUpRows;
    var topRow = this.rows.splice(topRowIndex, 1)[0];
    topRow.clear();
    this.rows.splice(this.currRow, 0, topRow);
    this.logger.log(VerboseLevel.INFO, 'Rolling up');
    // this.logger.log(VerboseLevel.TEXT, this.get_display_text())
  }

  /**
   * Get all non-empty rows with as unicode text.
   */;
  _proto5.getDisplayText = function getDisplayText(asOneRow) {
    asOneRow = asOneRow || false;
    var displayText = [];
    var text = '';
    var rowNr = -1;
    for (var i = 0; i < NR_ROWS; i++) {
      var rowText = this.rows[i].getTextString();
      if (rowText) {
        rowNr = i + 1;
        if (asOneRow) {
          displayText.push('Row ' + rowNr + ": '" + rowText + "'");
        } else {
          displayText.push(rowText.trim());
        }
      }
    }
    if (displayText.length > 0) {
      if (asOneRow) {
        text = '[' + displayText.join(' | ') + ']';
      } else {
        text = displayText.join('\n');
      }
    }
    return text;
  };
  _proto5.getTextAndFormat = function getTextAndFormat() {
    return this.rows;
  };
  return CaptionScreen;
}();

// var modes = ['MODE_ROLL-UP', 'MODE_POP-ON', 'MODE_PAINT-ON', 'MODE_TEXT'];
var Cea608Channel = /*#__PURE__*/function () {
  function Cea608Channel(channelNumber, outputFilter, logger) {
    this.chNr = void 0;
    this.outputFilter = void 0;
    this.mode = void 0;
    this.verbose = void 0;
    this.displayedMemory = void 0;
    this.nonDisplayedMemory = void 0;
    this.lastOutputScreen = void 0;
    this.currRollUpRow = void 0;
    this.writeScreen = void 0;
    this.cueStartTime = void 0;
    this.logger = void 0;
    this.chNr = channelNumber;
    this.outputFilter = outputFilter;
    this.mode = null;
    this.verbose = 0;
    this.displayedMemory = new CaptionScreen(logger);
    this.nonDisplayedMemory = new CaptionScreen(logger);
    this.lastOutputScreen = new CaptionScreen(logger);
    this.currRollUpRow = this.displayedMemory.rows[NR_ROWS - 1];
    this.writeScreen = this.displayedMemory;
    this.mode = null;
    this.cueStartTime = null; // Keeps track of where a cue started.
    this.logger = logger;
  }
  var _proto6 = Cea608Channel.prototype;
  _proto6.reset = function reset() {
    this.mode = null;
    this.displayedMemory.reset();
    this.nonDisplayedMemory.reset();
    this.lastOutputScreen.reset();
    this.outputFilter.reset();
    this.currRollUpRow = this.displayedMemory.rows[NR_ROWS - 1];
    this.writeScreen = this.displayedMemory;
    this.mode = null;
    this.cueStartTime = null;
  };
  _proto6.getHandler = function getHandler() {
    return this.outputFilter;
  };
  _proto6.setHandler = function setHandler(newHandler) {
    this.outputFilter = newHandler;
  };
  _proto6.setPAC = function setPAC(pacData) {
    this.writeScreen.setPAC(pacData);
  };
  _proto6.setBkgData = function setBkgData(bkgData) {
    this.writeScreen.setBkgData(bkgData);
  };
  _proto6.setMode = function setMode(newMode) {
    if (newMode === this.mode) {
      return;
    }
    this.mode = newMode;
    this.logger.log(VerboseLevel.INFO, function () {
      return 'MODE=' + newMode;
    });
    if (this.mode === 'MODE_POP-ON') {
      this.writeScreen = this.nonDisplayedMemory;
    } else {
      this.writeScreen = this.displayedMemory;
      this.writeScreen.reset();
    }
    if (this.mode !== 'MODE_ROLL-UP') {
      this.displayedMemory.nrRollUpRows = null;
      this.nonDisplayedMemory.nrRollUpRows = null;
    }
    this.mode = newMode;
  };
  _proto6.insertChars = function insertChars(chars) {
    var _this3 = this;
    for (var i = 0; i < chars.length; i++) {
      this.writeScreen.insertChar(chars[i]);
    }
    var screen = this.writeScreen === this.displayedMemory ? 'DISP' : 'NON_DISP';
    this.logger.log(VerboseLevel.INFO, function () {
      return screen + ': ' + _this3.writeScreen.getDisplayText(true);
    });
    if (this.mode === 'MODE_PAINT-ON' || this.mode === 'MODE_ROLL-UP') {
      this.logger.log(VerboseLevel.TEXT, function () {
        return 'DISPLAYED: ' + _this3.displayedMemory.getDisplayText(true);
      });
      this.outputDataUpdate();
    }
  };
  _proto6.ccRCL = function ccRCL() {
    // Resume Caption Loading (switch mode to Pop On)
    this.logger.log(VerboseLevel.INFO, 'RCL - Resume Caption Loading');
    this.setMode('MODE_POP-ON');
  };
  _proto6.ccBS = function ccBS() {
    // BackSpace
    this.logger.log(VerboseLevel.INFO, 'BS - BackSpace');
    if (this.mode === 'MODE_TEXT') {
      return;
    }
    this.writeScreen.backSpace();
    if (this.writeScreen === this.displayedMemory) {
      this.outputDataUpdate();
    }
  };
  _proto6.ccAOF = function ccAOF() {
    // Reserved (formerly Alarm Off)
  };
  _proto6.ccAON = function ccAON() {
    // Reserved (formerly Alarm On)
  };
  _proto6.ccDER = function ccDER() {
    // Delete to End of Row
    this.logger.log(VerboseLevel.INFO, 'DER- Delete to End of Row');
    this.writeScreen.clearToEndOfRow();
    this.outputDataUpdate();
  };
  _proto6.ccRU = function ccRU(nrRows) {
    // Roll-Up Captions-2,3,or 4 Rows
    this.logger.log(VerboseLevel.INFO, 'RU(' + nrRows + ') - Roll Up');
    this.writeScreen = this.displayedMemory;
    this.setMode('MODE_ROLL-UP');
    this.writeScreen.setRollUpRows(nrRows);
  };
  _proto6.ccFON = function ccFON() {
    // Flash On
    this.logger.log(VerboseLevel.INFO, 'FON - Flash On');
    this.writeScreen.setPen({
      flash: true
    });
  };
  _proto6.ccRDC = function ccRDC() {
    // Resume Direct Captioning (switch mode to PaintOn)
    this.logger.log(VerboseLevel.INFO, 'RDC - Resume Direct Captioning');
    this.setMode('MODE_PAINT-ON');
  };
  _proto6.ccTR = function ccTR() {
    // Text Restart in text mode (not supported, however)
    this.logger.log(VerboseLevel.INFO, 'TR');
    this.setMode('MODE_TEXT');
  };
  _proto6.ccRTD = function ccRTD() {
    // Resume Text Display in Text mode (not supported, however)
    this.logger.log(VerboseLevel.INFO, 'RTD');
    this.setMode('MODE_TEXT');
  };
  _proto6.ccEDM = function ccEDM() {
    // Erase Displayed Memory
    this.logger.log(VerboseLevel.INFO, 'EDM - Erase Displayed Memory');
    this.displayedMemory.reset();
    this.outputDataUpdate(true);
  };
  _proto6.ccCR = function ccCR() {
    // Carriage Return
    this.logger.log(VerboseLevel.INFO, 'CR - Carriage Return');
    this.writeScreen.rollUp();
    this.outputDataUpdate(true);
  };
  _proto6.ccENM = function ccENM() {
    // Erase Non-Displayed Memory
    this.logger.log(VerboseLevel.INFO, 'ENM - Erase Non-displayed Memory');
    this.nonDisplayedMemory.reset();
  };
  _proto6.ccEOC = function ccEOC() {
    var _this4 = this;
    // End of Caption (Flip Memories)
    this.logger.log(VerboseLevel.INFO, 'EOC - End Of Caption');
    if (this.mode === 'MODE_POP-ON') {
      var tmp = this.displayedMemory;
      this.displayedMemory = this.nonDisplayedMemory;
      this.nonDisplayedMemory = tmp;
      this.writeScreen = this.nonDisplayedMemory;
      this.logger.log(VerboseLevel.TEXT, function () {
        return 'DISP: ' + _this4.displayedMemory.getDisplayText();
      });
    }
    this.outputDataUpdate(true);
  };
  _proto6.ccTO = function ccTO(nrCols) {
    // Tab Offset 1,2, or 3 columns
    this.logger.log(VerboseLevel.INFO, 'TO(' + nrCols + ') - Tab Offset');
    this.writeScreen.moveCursor(nrCols);
  };
  _proto6.ccMIDROW = function ccMIDROW(secondByte) {
    // Parse MIDROW command
    var styles = {
      flash: false
    };
    styles.underline = secondByte % 2 === 1;
    styles.italics = secondByte >= 0x2e;
    if (!styles.italics) {
      var colorIndex = Math.floor(secondByte / 2) - 0x10;
      var colors = ['white', 'green', 'blue', 'cyan', 'red', 'yellow', 'magenta'];
      styles.foreground = colors[colorIndex];
    } else {
      styles.foreground = 'white';
    }
    this.logger.log(VerboseLevel.INFO, 'MIDROW: ' + JSON.stringify(styles));
    this.writeScreen.setPen(styles);
  };
  _proto6.outputDataUpdate = function outputDataUpdate(dispatch) {
    if (dispatch === void 0) {
      dispatch = false;
    }
    var time = this.logger.time;
    if (time === null) {
      return;
    }
    if (this.outputFilter) {
      if (this.cueStartTime === null && !this.displayedMemory.isEmpty()) {
        // Start of a new cue
        this.cueStartTime = time;
      } else {
        if (!this.displayedMemory.equals(this.lastOutputScreen)) {
          this.outputFilter.newCue(this.cueStartTime, time, this.lastOutputScreen);
          if (dispatch && this.outputFilter.dispatchCue) {
            this.outputFilter.dispatchCue();
          }
          this.cueStartTime = this.displayedMemory.isEmpty() ? null : time;
        }
      }
      this.lastOutputScreen.copy(this.displayedMemory);
    }
  };
  _proto6.cueSplitAtTime = function cueSplitAtTime(t) {
    if (this.outputFilter) {
      if (!this.displayedMemory.isEmpty()) {
        if (this.outputFilter.newCue) {
          this.outputFilter.newCue(this.cueStartTime, t, this.displayedMemory);
        }
        this.cueStartTime = t;
      }
    }
  };
  return Cea608Channel;
}();
var Cea608Parser = /*#__PURE__*/function () {
  function Cea608Parser(field, out1, out2) {
    this.channels = void 0;
    this.currentChannel = 0;
    this.cmdHistory = void 0;
    this.logger = void 0;
    var logger = new CaptionsLogger();
    this.channels = [null, new Cea608Channel(field, out1, logger), new Cea608Channel(field + 1, out2, logger)];
    this.cmdHistory = createCmdHistory();
    this.logger = logger;
  }
  var _proto7 = Cea608Parser.prototype;
  _proto7.getHandler = function getHandler(channel) {
    return this.channels[channel].getHandler();
  };
  _proto7.setHandler = function setHandler(channel, newHandler) {
    this.channels[channel].setHandler(newHandler);
  }

  /**
   * Add data for time t in forms of list of bytes (unsigned ints). The bytes are treated as pairs.
   */;
  _proto7.addData = function addData(time, byteList) {
    var cmdFound;
    var a;
    var b;
    var charsFound = false;
    this.logger.time = time;
    for (var i = 0; i < byteList.length; i += 2) {
      a = byteList[i] & 0x7f;
      b = byteList[i + 1] & 0x7f;
      if (a === 0 && b === 0) {
        continue;
      } else {
        this.logger.log(VerboseLevel.DATA, '[' + numArrayToHexArray([byteList[i], byteList[i + 1]]) + '] -> (' + numArrayToHexArray([a, b]) + ')');
      }
      cmdFound = this.parseCmd(a, b);
      if (!cmdFound) {
        cmdFound = this.parseMidrow(a, b);
      }
      if (!cmdFound) {
        cmdFound = this.parsePAC(a, b);
      }
      if (!cmdFound) {
        cmdFound = this.parseBackgroundAttributes(a, b);
      }
      if (!cmdFound) {
        charsFound = this.parseChars(a, b);
        if (charsFound) {
          var currChNr = this.currentChannel;
          if (currChNr && currChNr > 0) {
            var channel = this.channels[currChNr];
            channel.insertChars(charsFound);
          } else {
            this.logger.log(VerboseLevel.WARNING, 'No channel found yet. TEXT-MODE?');
          }
        }
      }
      if (!cmdFound && !charsFound) {
        this.logger.log(VerboseLevel.WARNING, "Couldn't parse cleaned data " + numArrayToHexArray([a, b]) + ' orig: ' + numArrayToHexArray([byteList[i], byteList[i + 1]]));
      }
    }
  }

  /**
   * Parse Command.
   * @returns {Boolean} Tells if a command was found
   */;
  _proto7.parseCmd = function parseCmd(a, b) {
    var cmdHistory = this.cmdHistory;
    var cond1 = (a === 0x14 || a === 0x1c || a === 0x15 || a === 0x1d) && b >= 0x20 && b <= 0x2f;
    var cond2 = (a === 0x17 || a === 0x1f) && b >= 0x21 && b <= 0x23;
    if (!(cond1 || cond2)) {
      return false;
    }
    if (hasCmdRepeated(a, b, cmdHistory)) {
      setLastCmd(null, null, cmdHistory);
      this.logger.log(VerboseLevel.DEBUG, 'Repeated command (' + numArrayToHexArray([a, b]) + ') is dropped');
      return true;
    }
    var chNr = a === 0x14 || a === 0x15 || a === 0x17 ? 1 : 2;
    var channel = this.channels[chNr];
    if (a === 0x14 || a === 0x15 || a === 0x1c || a === 0x1d) {
      if (b === 0x20) {
        channel.ccRCL();
      } else if (b === 0x21) {
        channel.ccBS();
      } else if (b === 0x22) {
        channel.ccAOF();
      } else if (b === 0x23) {
        channel.ccAON();
      } else if (b === 0x24) {
        channel.ccDER();
      } else if (b === 0x25) {
        channel.ccRU(2);
      } else if (b === 0x26) {
        channel.ccRU(3);
      } else if (b === 0x27) {
        channel.ccRU(4);
      } else if (b === 0x28) {
        channel.ccFON();
      } else if (b === 0x29) {
        channel.ccRDC();
      } else if (b === 0x2a) {
        channel.ccTR();
      } else if (b === 0x2b) {
        channel.ccRTD();
      } else if (b === 0x2c) {
        channel.ccEDM();
      } else if (b === 0x2d) {
        channel.ccCR();
      } else if (b === 0x2e) {
        channel.ccENM();
      } else if (b === 0x2f) {
        channel.ccEOC();
      }
    } else {
      // a == 0x17 || a == 0x1F
      channel.ccTO(b - 0x20);
    }
    setLastCmd(a, b, cmdHistory);
    this.currentChannel = chNr;
    return true;
  }

  /**
   * Parse midrow styling command
   * @returns {Boolean}
   */;
  _proto7.parseMidrow = function parseMidrow(a, b) {
    var chNr = 0;
    if ((a === 0x11 || a === 0x19) && b >= 0x20 && b <= 0x2f) {
      if (a === 0x11) {
        chNr = 1;
      } else {
        chNr = 2;
      }
      if (chNr !== this.currentChannel) {
        this.logger.log(VerboseLevel.ERROR, 'Mismatch channel in midrow parsing');
        return false;
      }
      var channel = this.channels[chNr];
      if (!channel) {
        return false;
      }
      channel.ccMIDROW(b);
      this.logger.log(VerboseLevel.DEBUG, 'MIDROW (' + numArrayToHexArray([a, b]) + ')');
      return true;
    }
    return false;
  }

  /**
   * Parse Preable Access Codes (Table 53).
   * @returns {Boolean} Tells if PAC found
   */;
  _proto7.parsePAC = function parsePAC(a, b) {
    var row;
    var cmdHistory = this.cmdHistory;
    var case1 = (a >= 0x11 && a <= 0x17 || a >= 0x19 && a <= 0x1f) && b >= 0x40 && b <= 0x7f;
    var case2 = (a === 0x10 || a === 0x18) && b >= 0x40 && b <= 0x5f;
    if (!(case1 || case2)) {
      return false;
    }
    if (hasCmdRepeated(a, b, cmdHistory)) {
      setLastCmd(null, null, cmdHistory);
      return true; // Repeated commands are dropped (once)
    }

    var chNr = a <= 0x17 ? 1 : 2;
    if (b >= 0x40 && b <= 0x5f) {
      row = chNr === 1 ? rowsLowCh1[a] : rowsLowCh2[a];
    } else {
      // 0x60 <= b <= 0x7F
      row = chNr === 1 ? rowsHighCh1[a] : rowsHighCh2[a];
    }
    var channel = this.channels[chNr];
    if (!channel) {
      return false;
    }
    channel.setPAC(this.interpretPAC(row, b));
    setLastCmd(a, b, cmdHistory);
    this.currentChannel = chNr;
    return true;
  }

  /**
   * Interpret the second byte of the pac, and return the information.
   * @returns {Object} pacData with style parameters.
   */;
  _proto7.interpretPAC = function interpretPAC(row, _byte3) {
    var pacIndex;
    var pacData = {
      color: null,
      italics: false,
      indent: null,
      underline: false,
      row: row
    };
    if (_byte3 > 0x5f) {
      pacIndex = _byte3 - 0x60;
    } else {
      pacIndex = _byte3 - 0x40;
    }
    pacData.underline = (pacIndex & 1) === 1;
    if (pacIndex <= 0xd) {
      pacData.color = ['white', 'green', 'blue', 'cyan', 'red', 'yellow', 'magenta', 'white'][Math.floor(pacIndex / 2)];
    } else if (pacIndex <= 0xf) {
      pacData.italics = true;
      pacData.color = 'white';
    } else {
      pacData.indent = Math.floor((pacIndex - 0x10) / 2) * 4;
    }
    return pacData; // Note that row has zero offset. The spec uses 1.
  }

  /**
   * Parse characters.
   * @returns An array with 1 to 2 codes corresponding to chars, if found. null otherwise.
   */;
  _proto7.parseChars = function parseChars(a, b) {
    var channelNr;
    var charCodes = null;
    var charCode1 = null;
    if (a >= 0x19) {
      channelNr = 2;
      charCode1 = a - 8;
    } else {
      channelNr = 1;
      charCode1 = a;
    }
    if (charCode1 >= 0x11 && charCode1 <= 0x13) {
      // Special character
      var oneCode;
      if (charCode1 === 0x11) {
        oneCode = b + 0x50;
      } else if (charCode1 === 0x12) {
        oneCode = b + 0x70;
      } else {
        oneCode = b + 0x90;
      }
      this.logger.log(VerboseLevel.INFO, "Special char '" + getCharForByte(oneCode) + "' in channel " + channelNr);
      charCodes = [oneCode];
    } else if (a >= 0x20 && a <= 0x7f) {
      charCodes = b === 0 ? [a] : [a, b];
    }
    if (charCodes) {
      var hexCodes = numArrayToHexArray(charCodes);
      this.logger.log(VerboseLevel.DEBUG, 'Char codes =  ' + hexCodes.join(','));
      setLastCmd(a, b, this.cmdHistory);
    }
    return charCodes;
  }

  /**
   * Parse extended background attributes as well as new foreground color black.
   * @returns {Boolean} Tells if background attributes are found
   */;
  _proto7.parseBackgroundAttributes = function parseBackgroundAttributes(a, b) {
    var case1 = (a === 0x10 || a === 0x18) && b >= 0x20 && b <= 0x2f;
    var case2 = (a === 0x17 || a === 0x1f) && b >= 0x2d && b <= 0x2f;
    if (!(case1 || case2)) {
      return false;
    }
    var index;
    var bkgData = {};
    if (a === 0x10 || a === 0x18) {
      index = Math.floor((b - 0x20) / 2);
      bkgData.background = backgroundColors[index];
      if (b % 2 === 1) {
        bkgData.background = bkgData.background + '_semi';
      }
    } else if (b === 0x2d) {
      bkgData.background = 'transparent';
    } else {
      bkgData.foreground = 'black';
      if (b === 0x2f) {
        bkgData.underline = true;
      }
    }
    var chNr = a <= 0x17 ? 1 : 2;
    var channel = this.channels[chNr];
    channel.setBkgData(bkgData);
    setLastCmd(a, b, this.cmdHistory);
    return true;
  }

  /**
   * Reset state of parser and its channels.
   */;
  _proto7.reset = function reset() {
    for (var i = 0; i < Object.keys(this.channels).length; i++) {
      var channel = this.channels[i];
      if (channel) {
        channel.reset();
      }
    }
    this.cmdHistory = createCmdHistory();
  }

  /**
   * Trigger the generation of a cue, and the start of a new one if displayScreens are not empty.
   */;
  _proto7.cueSplitAtTime = function cueSplitAtTime(t) {
    for (var i = 0; i < this.channels.length; i++) {
      var channel = this.channels[i];
      if (channel) {
        channel.cueSplitAtTime(t);
      }
    }
  };
  return Cea608Parser;
}();
function setLastCmd(a, b, cmdHistory) {
  cmdHistory.a = a;
  cmdHistory.b = b;
}
function hasCmdRepeated(a, b, cmdHistory) {
  return cmdHistory.a === a && cmdHistory.b === b;
}
function createCmdHistory() {
  return {
    a: null,
    b: null
  };
}
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (Cea608Parser);

/***/ }),

/***/ "./src/utils/codecs.ts":
/*!*****************************!*\
  !*** ./src/utils/codecs.ts ***!
  \*****************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "isCodecSupportedInMp4": () => (/* binding */ isCodecSupportedInMp4),
/* harmony export */   "isCodecType": () => (/* binding */ isCodecType)
/* harmony export */ });
// from http://mp4ra.org/codecs.html
var sampleEntryCodesISO = {
  audio: {
    a3ds: true,
    'ac-3': true,
    'ac-4': true,
    alac: true,
    alaw: true,
    dra1: true,
    'dts+': true,
    'dts-': true,
    dtsc: true,
    dtse: true,
    dtsh: true,
    'ec-3': true,
    enca: true,
    g719: true,
    g726: true,
    m4ae: true,
    mha1: true,
    mha2: true,
    mhm1: true,
    mhm2: true,
    mlpa: true,
    mp4a: true,
    'raw ': true,
    Opus: true,
    opus: true,
    // browsers expect this to be lowercase despite MP4RA says 'Opus'
    samr: true,
    sawb: true,
    sawp: true,
    sevc: true,
    sqcp: true,
    ssmv: true,
    twos: true,
    ulaw: true
  },
  video: {
    avc1: true,
    avc2: true,
    avc3: true,
    avc4: true,
    avcp: true,
    av01: true,
    drac: true,
    dva1: true,
    dvav: true,
    dvh1: true,
    dvhe: true,
    encv: true,
    hev1: true,
    hvc1: true,
    mjp2: true,
    mp4v: true,
    mvc1: true,
    mvc2: true,
    mvc3: true,
    mvc4: true,
    resv: true,
    rv60: true,
    s263: true,
    svc1: true,
    svc2: true,
    'vc-1': true,
    vp08: true,
    vp09: true
  },
  text: {
    stpp: true,
    wvtt: true
  }
};
function isCodecType(codec, type) {
  var typeCodes = sampleEntryCodesISO[type];
  return !!typeCodes && typeCodes[codec.slice(0, 4)] === true;
}
function isCodecSupportedInMp4(codec, type) {
  return MediaSource.isTypeSupported((type || 'video') + "/mp4;codecs=\"" + codec + "\"");
}

/***/ }),

/***/ "./src/utils/cues.ts":
/*!***************************!*\
  !*** ./src/utils/cues.ts ***!
  \***************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _vttparser__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./vttparser */ "./src/utils/vttparser.ts");
/* harmony import */ var _webvtt_parser__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./webvtt-parser */ "./src/utils/webvtt-parser.ts");
/* harmony import */ var _texttrack_utils__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./texttrack-utils */ "./src/utils/texttrack-utils.ts");



var WHITESPACE_CHAR = /\s/;
var Cues = {
  newCue: function newCue(track, startTime, endTime, captionScreen) {
    var result = [];
    var row;
    // the type data states this is VTTCue, but it can potentially be a TextTrackCue on old browsers
    var cue;
    var indenting;
    var indent;
    var text;
    var Cue = self.VTTCue || self.TextTrackCue;
    for (var r = 0; r < captionScreen.rows.length; r++) {
      row = captionScreen.rows[r];
      indenting = true;
      indent = 0;
      text = '';
      if (!row.isEmpty()) {
        for (var c = 0; c < row.chars.length; c++) {
          if (WHITESPACE_CHAR.test(row.chars[c].uchar) && indenting) {
            indent++;
          } else {
            text += row.chars[c].uchar;
            indenting = false;
          }
        }
        // To be used for cleaning-up orphaned roll-up captions
        row.cueStartTime = startTime;

        // Give a slight bump to the endTime if it's equal to startTime to avoid a SyntaxError in IE
        if (startTime === endTime) {
          endTime += 0.0001;
        }
        if (indent >= 16) {
          indent--;
        } else {
          indent++;
        }
        var cueText = (0,_vttparser__WEBPACK_IMPORTED_MODULE_0__.fixLineBreaks)(text.trim());
        var id = (0,_webvtt_parser__WEBPACK_IMPORTED_MODULE_1__.generateCueId)(startTime, endTime, cueText);

        // If this cue already exists in the track do not push it
        if (!track || !track.cues || !track.cues.getCueById(id)) {
          cue = new Cue(startTime, endTime, cueText);
          cue.id = id;
          cue.line = r + 1;
          cue.align = 'left';
          // Clamp the position between 10 and 80 percent (CEA-608 PAC indent code)
          // https://dvcs.w3.org/hg/text-tracks/raw-file/default/608toVTT/608toVTT.html#positioning-in-cea-608
          // Firefox throws an exception and captions break with out of bounds 0-100 values
          cue.position = 10 + Math.min(80, Math.floor(indent * 8 / 32) * 10);
          result.push(cue);
        }
      }
    }
    if (track && result.length) {
      // Sort bottom cues in reverse order so that they render in line order when overlapping in Chrome
      result.sort(function (cueA, cueB) {
        if (cueA.line === 'auto' || cueB.line === 'auto') {
          return 0;
        }
        if (cueA.line > 8 && cueB.line > 8) {
          return cueB.line - cueA.line;
        }
        return cueA.line - cueB.line;
      });
      result.forEach(function (cue) {
        return (0,_texttrack_utils__WEBPACK_IMPORTED_MODULE_2__.addCueToTrack)(track, cue);
      });
    }
    return result;
  }
};
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (Cues);

/***/ }),

/***/ "./src/utils/discontinuities.ts":
/*!**************************************!*\
  !*** ./src/utils/discontinuities.ts ***!
  \**************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "adjustSlidingStart": () => (/* binding */ adjustSlidingStart),
/* harmony export */   "alignMediaPlaylistByPDT": () => (/* binding */ alignMediaPlaylistByPDT),
/* harmony export */   "alignPDT": () => (/* binding */ alignPDT),
/* harmony export */   "alignStream": () => (/* binding */ alignStream),
/* harmony export */   "findDiscontinuousReferenceFrag": () => (/* binding */ findDiscontinuousReferenceFrag),
/* harmony export */   "findFirstFragWithCC": () => (/* binding */ findFirstFragWithCC),
/* harmony export */   "shouldAlignOnDiscontinuities": () => (/* binding */ shouldAlignOnDiscontinuities)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _logger__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./logger */ "./src/utils/logger.ts");
/* harmony import */ var _controller_level_helper__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../controller/level-helper */ "./src/controller/level-helper.ts");




function findFirstFragWithCC(fragments, cc) {
  var firstFrag = null;
  for (var i = 0, len = fragments.length; i < len; i++) {
    var currentFrag = fragments[i];
    if (currentFrag && currentFrag.cc === cc) {
      firstFrag = currentFrag;
      break;
    }
  }
  return firstFrag;
}
function shouldAlignOnDiscontinuities(lastFrag, lastLevel, details) {
  if (lastLevel.details) {
    if (details.endCC > details.startCC || lastFrag && lastFrag.cc < details.startCC) {
      return true;
    }
  }
  return false;
}

// Find the first frag in the previous level which matches the CC of the first frag of the new level
function findDiscontinuousReferenceFrag(prevDetails, curDetails, referenceIndex) {
  if (referenceIndex === void 0) {
    referenceIndex = 0;
  }
  var prevFrags = prevDetails.fragments;
  var curFrags = curDetails.fragments;
  if (!curFrags.length || !prevFrags.length) {
    _logger__WEBPACK_IMPORTED_MODULE_1__.logger.log('No fragments to align');
    return;
  }
  var prevStartFrag = findFirstFragWithCC(prevFrags, curFrags[0].cc);
  if (!prevStartFrag || prevStartFrag && !prevStartFrag.startPTS) {
    _logger__WEBPACK_IMPORTED_MODULE_1__.logger.log('No frag in previous level to align on');
    return;
  }
  return prevStartFrag;
}
function adjustFragmentStart(frag, sliding) {
  if (frag) {
    var start = frag.start + sliding;
    frag.start = frag.startPTS = start;
    frag.endPTS = start + frag.duration;
  }
}
function adjustSlidingStart(sliding, details) {
  // Update segments
  var fragments = details.fragments;
  for (var i = 0, len = fragments.length; i < len; i++) {
    adjustFragmentStart(fragments[i], sliding);
  }
  // Update LL-HLS parts at the end of the playlist
  if (details.fragmentHint) {
    adjustFragmentStart(details.fragmentHint, sliding);
  }
  details.alignedSliding = true;
}

/**
 * Using the parameters of the last level, this function computes PTS' of the new fragments so that they form a
 * contiguous stream with the last fragments.
 * The PTS of a fragment lets Hls.js know where it fits into a stream - by knowing every PTS, we know which fragment to
 * download at any given time. PTS is normally computed when the fragment is demuxed, so taking this step saves us time
 * and an extra download.
 * @param lastFrag
 * @param lastLevel
 * @param details
 */
function alignStream(lastFrag, lastLevel, details) {
  if (!lastLevel) {
    return;
  }
  alignDiscontinuities(lastFrag, details, lastLevel);
  if (!details.alignedSliding && lastLevel.details) {
    // If the PTS wasn't figured out via discontinuity sequence that means there was no CC increase within the level.
    // Aligning via Program Date Time should therefore be reliable, since PDT should be the same within the same
    // discontinuity sequence.
    alignPDT(details, lastLevel.details);
  }
  if (!details.alignedSliding && lastLevel.details && !details.skippedSegments) {
    // Try to align on sn so that we pick a better start fragment.
    // Do not perform this on playlists with delta updates as this is only to align levels on switch
    // and adjustSliding only adjusts fragments after skippedSegments.
    (0,_controller_level_helper__WEBPACK_IMPORTED_MODULE_2__.adjustSliding)(lastLevel.details, details);
  }
}

/**
 * Computes the PTS if a new level's fragments using the PTS of a fragment in the last level which shares the same
 * discontinuity sequence.
 * @param lastFrag - The last Fragment which shares the same discontinuity sequence
 * @param lastLevel - The details of the last loaded level
 * @param details - The details of the new level
 */
function alignDiscontinuities(lastFrag, details, lastLevel) {
  if (shouldAlignOnDiscontinuities(lastFrag, lastLevel, details)) {
    var referenceFrag = findDiscontinuousReferenceFrag(lastLevel.details, details);
    if (referenceFrag && (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(referenceFrag.start)) {
      _logger__WEBPACK_IMPORTED_MODULE_1__.logger.log("Adjusting PTS using last level due to CC increase within current level " + details.url);
      adjustSlidingStart(referenceFrag.start, details);
    }
  }
}

/**
 * Computes the PTS of a new level's fragments using the difference in Program Date Time from the last level.
 * @param details - The details of the new level
 * @param lastDetails - The details of the last loaded level
 */
function alignPDT(details, lastDetails) {
  // This check protects the unsafe "!" usage below for null program date time access.
  if (!lastDetails.fragments.length || !details.hasProgramDateTime || !lastDetails.hasProgramDateTime) {
    return;
  }
  // if last level sliding is 1000 and its first frag PROGRAM-DATE-TIME is 2017-08-20 1:10:00 AM
  // and if new details first frag PROGRAM DATE-TIME is 2017-08-20 1:10:08 AM
  // then we can deduce that playlist B sliding is 1000+8 = 1008s
  var lastPDT = lastDetails.fragments[0].programDateTime; // hasProgramDateTime check above makes this safe.
  var newPDT = details.fragments[0].programDateTime;
  // date diff is in ms. frag.start is in seconds
  var sliding = (newPDT - lastPDT) / 1000 + lastDetails.fragments[0].start;
  if (sliding && (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(sliding)) {
    _logger__WEBPACK_IMPORTED_MODULE_1__.logger.log("Adjusting PTS using programDateTime delta " + (newPDT - lastPDT) + "ms, sliding:" + sliding.toFixed(3) + " " + details.url + " ");
    adjustSlidingStart(sliding, details);
  }
}

/**
 * Ensures appropriate time-alignment between renditions based on PDT. Unlike `alignPDT`, which adjusts
 * the timeline based on the delta between PDTs of the 0th fragment of two playlists/`LevelDetails`,
 * this function assumes the timelines represented in `refDetails` are accurate, including the PDTs,
 * and uses the "wallclock"/PDT timeline as a cross-reference to `details`, adjusting the presentation
 * times/timelines of `details` accordingly.
 * Given the asynchronous nature of fetches and initial loads of live `main` and audio/subtitle tracks,
 * the primary purpose of this function is to ensure the "local timelines" of audio/subtitle tracks
 * are aligned to the main/video timeline, using PDT as the cross-reference/"anchor" that should
 * be consistent across playlists, per the HLS spec.
 * @param details - The details of the rendition you'd like to time-align (e.g. an audio rendition).
 * @param refDetails - The details of the reference rendition with start and PDT times for alignment.
 */
function alignMediaPlaylistByPDT(details, refDetails) {
  if (!details.hasProgramDateTime || !refDetails.hasProgramDateTime) {
    return;
  }
  var fragments = details.fragments;
  var refFragments = refDetails.fragments;
  if (!fragments.length || !refFragments.length) {
    return;
  }

  // Calculate a delta to apply to all fragments according to the delta in PDT times and start times
  // of a fragment in the reference details, and a fragment in the target details of the same discontinuity.
  // If a fragment of the same discontinuity was not found use the middle fragment of both.
  var middleFrag = Math.round(refFragments.length / 2) - 1;
  var refFrag = refFragments[middleFrag];
  var frag = findFirstFragWithCC(fragments, refFrag.cc) || fragments[Math.round(fragments.length / 2) - 1];
  var refPDT = refFrag.programDateTime;
  var targetPDT = frag.programDateTime;
  if (refPDT === null || targetPDT === null) {
    return;
  }
  var delta = (targetPDT - refPDT) / 1000 - (frag.start - refFrag.start);
  adjustSlidingStart(delta, details);
}

/***/ }),

/***/ "./src/utils/ewma-bandwidth-estimator.ts":
/*!***********************************************!*\
  !*** ./src/utils/ewma-bandwidth-estimator.ts ***!
  \***********************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _utils_ewma__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../utils/ewma */ "./src/utils/ewma.ts");
/*
 * EWMA Bandwidth Estimator
 *  - heavily inspired from shaka-player
 * Tracks bandwidth samples and estimates available bandwidth.
 * Based on the minimum of two exponentially-weighted moving averages with
 * different half-lives.
 */


var EwmaBandWidthEstimator = /*#__PURE__*/function () {
  function EwmaBandWidthEstimator(slow, fast, defaultEstimate) {
    this.defaultEstimate_ = void 0;
    this.minWeight_ = void 0;
    this.minDelayMs_ = void 0;
    this.slow_ = void 0;
    this.fast_ = void 0;
    this.defaultEstimate_ = defaultEstimate;
    this.minWeight_ = 0.001;
    this.minDelayMs_ = 50;
    this.slow_ = new _utils_ewma__WEBPACK_IMPORTED_MODULE_0__["default"](slow);
    this.fast_ = new _utils_ewma__WEBPACK_IMPORTED_MODULE_0__["default"](fast);
  }
  var _proto = EwmaBandWidthEstimator.prototype;
  _proto.update = function update(slow, fast) {
    var slow_ = this.slow_,
      fast_ = this.fast_;
    if (this.slow_.halfLife !== slow) {
      this.slow_ = new _utils_ewma__WEBPACK_IMPORTED_MODULE_0__["default"](slow, slow_.getEstimate(), slow_.getTotalWeight());
    }
    if (this.fast_.halfLife !== fast) {
      this.fast_ = new _utils_ewma__WEBPACK_IMPORTED_MODULE_0__["default"](fast, fast_.getEstimate(), fast_.getTotalWeight());
    }
  };
  _proto.sample = function sample(durationMs, numBytes) {
    durationMs = Math.max(durationMs, this.minDelayMs_);
    var numBits = 8 * numBytes;
    // weight is duration in seconds
    var durationS = durationMs / 1000;
    // value is bandwidth in bits/s
    var bandwidthInBps = numBits / durationS;
    this.fast_.sample(durationS, bandwidthInBps);
    this.slow_.sample(durationS, bandwidthInBps);
  };
  _proto.canEstimate = function canEstimate() {
    var fast = this.fast_;
    return fast && fast.getTotalWeight() >= this.minWeight_;
  };
  _proto.getEstimate = function getEstimate() {
    if (this.canEstimate()) {
      // console.log('slow estimate:'+ Math.round(this.slow_.getEstimate()));
      // console.log('fast estimate:'+ Math.round(this.fast_.getEstimate()));
      // Take the minimum of these two estimates.  This should have the effect of
      // adapting down quickly, but up more slowly.
      return Math.min(this.fast_.getEstimate(), this.slow_.getEstimate());
    } else {
      return this.defaultEstimate_;
    }
  };
  _proto.destroy = function destroy() {};
  return EwmaBandWidthEstimator;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (EwmaBandWidthEstimator);

/***/ }),

/***/ "./src/utils/ewma.ts":
/*!***************************!*\
  !*** ./src/utils/ewma.ts ***!
  \***************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/*
 * compute an Exponential Weighted moving average
 * - https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
 *  - heavily inspired from shaka-player
 */
var EWMA = /*#__PURE__*/function () {
  //  About half of the estimated value will be from the last |halfLife| samples by weight.
  function EWMA(halfLife, estimate, weight) {
    if (estimate === void 0) {
      estimate = 0;
    }
    if (weight === void 0) {
      weight = 0;
    }
    this.halfLife = void 0;
    this.alpha_ = void 0;
    this.estimate_ = void 0;
    this.totalWeight_ = void 0;
    this.halfLife = halfLife;
    // Larger values of alpha expire historical data more slowly.
    this.alpha_ = halfLife ? Math.exp(Math.log(0.5) / halfLife) : 0;
    this.estimate_ = estimate;
    this.totalWeight_ = weight;
  }
  var _proto = EWMA.prototype;
  _proto.sample = function sample(weight, value) {
    var adjAlpha = Math.pow(this.alpha_, weight);
    this.estimate_ = value * (1 - adjAlpha) + adjAlpha * this.estimate_;
    this.totalWeight_ += weight;
  };
  _proto.getTotalWeight = function getTotalWeight() {
    return this.totalWeight_;
  };
  _proto.getEstimate = function getEstimate() {
    if (this.alpha_) {
      var zeroFactor = 1 - Math.pow(this.alpha_, this.totalWeight_);
      if (zeroFactor) {
        return this.estimate_ / zeroFactor;
      }
    }
    return this.estimate_;
  };
  return EWMA;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (EWMA);

/***/ }),

/***/ "./src/utils/fetch-loader.ts":
/*!***********************************!*\
  !*** ./src/utils/fetch-loader.ts ***!
  \***********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__),
/* harmony export */   "fetchSupported": () => (/* binding */ fetchSupported)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _loader_load_stats__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../loader/load-stats */ "./src/loader/load-stats.ts");
/* harmony import */ var _demux_chunk_cache__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../demux/chunk-cache */ "./src/demux/chunk-cache.ts");


function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
function _wrapNativeSuper(Class) { var _cache = typeof Map === "function" ? new Map() : undefined; _wrapNativeSuper = function _wrapNativeSuper(Class) { if (Class === null || !_isNativeFunction(Class)) return Class; if (typeof Class !== "function") { throw new TypeError("Super expression must either be null or a function"); } if (typeof _cache !== "undefined") { if (_cache.has(Class)) return _cache.get(Class); _cache.set(Class, Wrapper); } function Wrapper() { return _construct(Class, arguments, _getPrototypeOf(this).constructor); } Wrapper.prototype = Object.create(Class.prototype, { constructor: { value: Wrapper, enumerable: false, writable: true, configurable: true } }); return _setPrototypeOf(Wrapper, Class); }; return _wrapNativeSuper(Class); }
function _construct(Parent, args, Class) { if (_isNativeReflectConstruct()) { _construct = Reflect.construct.bind(); } else { _construct = function _construct(Parent, args, Class) { var a = [null]; a.push.apply(a, args); var Constructor = Function.bind.apply(Parent, a); var instance = new Constructor(); if (Class) _setPrototypeOf(instance, Class.prototype); return instance; }; } return _construct.apply(null, arguments); }
function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
function _isNativeFunction(fn) { return Function.toString.call(fn).indexOf("[native code]") !== -1; }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }


function fetchSupported() {
  if (
  // @ts-ignore
  self.fetch && self.AbortController && self.ReadableStream && self.Request) {
    try {
      new self.ReadableStream({}); // eslint-disable-line no-new
      return true;
    } catch (e) {
      /* noop */
    }
  }
  return false;
}
var FetchLoader = /*#__PURE__*/function () {
  function FetchLoader(config /* HlsConfig */) {
    this.fetchSetup = void 0;
    this.requestTimeout = void 0;
    this.request = void 0;
    this.response = void 0;
    this.controller = void 0;
    this.context = void 0;
    this.config = null;
    this.callbacks = null;
    this.stats = void 0;
    this.loader = null;
    this.fetchSetup = config.fetchSetup || getRequest;
    this.controller = new self.AbortController();
    this.stats = new _loader_load_stats__WEBPACK_IMPORTED_MODULE_1__.LoadStats();
  }
  var _proto = FetchLoader.prototype;
  _proto.destroy = function destroy() {
    this.loader = this.callbacks = null;
    this.abortInternal();
  };
  _proto.abortInternal = function abortInternal() {
    var response = this.response;
    if (!response || !response.ok) {
      this.stats.aborted = true;
      this.controller.abort();
    }
  };
  _proto.abort = function abort() {
    var _this$callbacks;
    this.abortInternal();
    if ((_this$callbacks = this.callbacks) !== null && _this$callbacks !== void 0 && _this$callbacks.onAbort) {
      this.callbacks.onAbort(this.stats, this.context, this.response);
    }
  };
  _proto.load = function load(context, config, callbacks) {
    var _this = this;
    var stats = this.stats;
    if (stats.loading.start) {
      throw new Error('Loader can only be used once.');
    }
    stats.loading.start = self.performance.now();
    var initParams = getRequestParameters(context, this.controller.signal);
    var onProgress = callbacks.onProgress;
    var isArrayBuffer = context.responseType === 'arraybuffer';
    var LENGTH = isArrayBuffer ? 'byteLength' : 'length';
    this.context = context;
    this.config = config;
    this.callbacks = callbacks;
    this.request = this.fetchSetup(context, initParams);
    self.clearTimeout(this.requestTimeout);
    this.requestTimeout = self.setTimeout(function () {
      _this.abortInternal();
      callbacks.onTimeout(stats, context, _this.response);
    }, config.timeout);
    self.fetch(this.request).then(function (response) {
      _this.response = _this.loader = response;
      if (!response.ok) {
        var status = response.status,
          statusText = response.statusText;
        throw new FetchError(statusText || 'fetch, bad network response', status, response);
      }
      stats.loading.first = Math.max(self.performance.now(), stats.loading.start);
      stats.total = parseInt(response.headers.get('Content-Length') || '0');
      if (onProgress && (0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(config.highWaterMark)) {
        return _this.loadProgressively(response, stats, context, config.highWaterMark, onProgress);
      }
      if (isArrayBuffer) {
        return response.arrayBuffer();
      }
      return response.text();
    }).then(function (responseData) {
      var response = _this.response;
      self.clearTimeout(_this.requestTimeout);
      stats.loading.end = Math.max(self.performance.now(), stats.loading.first);
      var total = responseData[LENGTH];
      if (total) {
        stats.loaded = stats.total = total;
      }
      var loaderResponse = {
        url: response.url,
        data: responseData
      };
      if (onProgress && !(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(config.highWaterMark)) {
        onProgress(stats, context, responseData, response);
      }
      callbacks.onSuccess(loaderResponse, stats, context, response);
    }).catch(function (error) {
      self.clearTimeout(_this.requestTimeout);
      if (stats.aborted) {
        return;
      }
      // CORS errors result in an undefined code. Set it to 0 here to align with XHR's behavior
      // when destroying, 'error' itself can be undefined
      var code = !error ? 0 : error.code || 0;
      var text = !error ? null : error.message;
      callbacks.onError({
        code: code,
        text: text
      }, context, error ? error.details : null);
    });
  };
  _proto.getCacheAge = function getCacheAge() {
    var result = null;
    if (this.response) {
      var ageHeader = this.response.headers.get('age');
      result = ageHeader ? parseFloat(ageHeader) : null;
    }
    return result;
  };
  _proto.loadProgressively = function loadProgressively(response, stats, context, highWaterMark, onProgress) {
    if (highWaterMark === void 0) {
      highWaterMark = 0;
    }
    var chunkCache = new _demux_chunk_cache__WEBPACK_IMPORTED_MODULE_2__["default"]();
    var reader = response.body.getReader();
    var pump = function pump() {
      return reader.read().then(function (data) {
        if (data.done) {
          if (chunkCache.dataLength) {
            onProgress(stats, context, chunkCache.flush(), response);
          }
          return Promise.resolve(new ArrayBuffer(0));
        }
        var chunk = data.value;
        var len = chunk.length;
        stats.loaded += len;
        if (len < highWaterMark || chunkCache.dataLength) {
          // The current chunk is too small to to be emitted or the cache already has data
          // Push it to the cache
          chunkCache.push(chunk);
          if (chunkCache.dataLength >= highWaterMark) {
            // flush in order to join the typed arrays
            onProgress(stats, context, chunkCache.flush(), response);
          }
        } else {
          // If there's nothing cached already, and the chache is large enough
          // just emit the progress event
          onProgress(stats, context, chunk, response);
        }
        return pump();
      }).catch(function () {
        /* aborted */
        return Promise.reject();
      });
    };
    return pump();
  };
  return FetchLoader;
}();
function getRequestParameters(context, signal) {
  var initParams = {
    method: 'GET',
    mode: 'cors',
    credentials: 'same-origin',
    signal: signal,
    headers: new self.Headers(_extends({}, context.headers))
  };
  if (context.rangeEnd) {
    initParams.headers.set('Range', 'bytes=' + context.rangeStart + '-' + String(context.rangeEnd - 1));
  }
  return initParams;
}
function getRequest(context, initParams) {
  return new self.Request(context.url, initParams);
}
var FetchError = /*#__PURE__*/function (_Error) {
  _inheritsLoose(FetchError, _Error);
  function FetchError(message, code, details) {
    var _this2;
    _this2 = _Error.call(this, message) || this;
    _this2.code = void 0;
    _this2.details = void 0;
    _this2.code = code;
    _this2.details = details;
    return _this2;
  }
  return FetchError;
}( /*#__PURE__*/_wrapNativeSuper(Error));
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (FetchLoader);

/***/ }),

/***/ "./src/utils/hex.ts":
/*!**************************!*\
  !*** ./src/utils/hex.ts ***!
  \**************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/**
 *  hex dump helper class
 */

var Hex = {
  hexDump: function hexDump(array) {
    var str = '';
    for (var i = 0; i < array.length; i++) {
      var h = array[i].toString(16);
      if (h.length < 2) {
        h = '0' + h;
      }
      str += h;
    }
    return str;
  }
};
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (Hex);

/***/ }),

/***/ "./src/utils/imsc1-ttml-parser.ts":
/*!****************************************!*\
  !*** ./src/utils/imsc1-ttml-parser.ts ***!
  \****************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "IMSC1_CODEC": () => (/* binding */ IMSC1_CODEC),
/* harmony export */   "parseIMSC1": () => (/* binding */ parseIMSC1)
/* harmony export */ });
/* harmony import */ var _mp4_tools__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./mp4-tools */ "./src/utils/mp4-tools.ts");
/* harmony import */ var _vttparser__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./vttparser */ "./src/utils/vttparser.ts");
/* harmony import */ var _vttcue__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./vttcue */ "./src/utils/vttcue.ts");
/* harmony import */ var _demux_id3__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../demux/id3 */ "./src/demux/id3.ts");
/* harmony import */ var _timescale_conversion__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ./timescale-conversion */ "./src/utils/timescale-conversion.ts");
/* harmony import */ var _webvtt_parser__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(/*! ./webvtt-parser */ "./src/utils/webvtt-parser.ts");
function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }






var IMSC1_CODEC = 'stpp.ttml.im1t';

// Time format: h:m:s:frames(.subframes)
var HMSF_REGEX = /^(\d{2,}):(\d{2}):(\d{2}):(\d{2})\.?(\d+)?$/;

// Time format: hours, minutes, seconds, milliseconds, frames, ticks
var TIME_UNIT_REGEX = /^(\d*(?:\.\d*)?)(h|m|s|ms|f|t)$/;
var textAlignToLineAlign = {
  left: 'start',
  center: 'center',
  right: 'end',
  start: 'start',
  end: 'end'
};
function parseIMSC1(payload, initPTS, timescale, callBack, errorCallBack) {
  var results = (0,_mp4_tools__WEBPACK_IMPORTED_MODULE_0__.findBox)(new Uint8Array(payload), ['mdat']);
  if (results.length === 0) {
    errorCallBack(new Error('Could not parse IMSC1 mdat'));
    return;
  }
  var ttmlList = results.map(function (mdat) {
    return (0,_demux_id3__WEBPACK_IMPORTED_MODULE_3__.utf8ArrayToStr)(mdat);
  });
  var syncTime = (0,_timescale_conversion__WEBPACK_IMPORTED_MODULE_4__.toTimescaleFromScale)(initPTS, 1, timescale);
  try {
    ttmlList.forEach(function (ttml) {
      return callBack(parseTTML(ttml, syncTime));
    });
  } catch (error) {
    errorCallBack(error);
  }
}
function parseTTML(ttml, syncTime) {
  var parser = new DOMParser();
  var xmlDoc = parser.parseFromString(ttml, 'text/xml');
  var tt = xmlDoc.getElementsByTagName('tt')[0];
  if (!tt) {
    throw new Error('Invalid ttml');
  }
  var defaultRateInfo = {
    frameRate: 30,
    subFrameRate: 1,
    frameRateMultiplier: 0,
    tickRate: 0
  };
  var rateInfo = Object.keys(defaultRateInfo).reduce(function (result, key) {
    result[key] = tt.getAttribute("ttp:" + key) || defaultRateInfo[key];
    return result;
  }, {});
  var trim = tt.getAttribute('xml:space') !== 'preserve';
  var styleElements = collectionToDictionary(getElementCollection(tt, 'styling', 'style'));
  var regionElements = collectionToDictionary(getElementCollection(tt, 'layout', 'region'));
  var cueElements = getElementCollection(tt, 'body', '[begin]');
  return [].map.call(cueElements, function (cueElement) {
    var cueText = getTextContent(cueElement, trim);
    if (!cueText || !cueElement.hasAttribute('begin')) {
      return null;
    }
    var startTime = parseTtmlTime(cueElement.getAttribute('begin'), rateInfo);
    var duration = parseTtmlTime(cueElement.getAttribute('dur'), rateInfo);
    var endTime = parseTtmlTime(cueElement.getAttribute('end'), rateInfo);
    if (startTime === null) {
      throw timestampParsingError(cueElement);
    }
    if (endTime === null) {
      if (duration === null) {
        throw timestampParsingError(cueElement);
      }
      endTime = startTime + duration;
    }
    var cue = new _vttcue__WEBPACK_IMPORTED_MODULE_2__["default"](startTime - syncTime, endTime - syncTime, cueText);
    cue.id = (0,_webvtt_parser__WEBPACK_IMPORTED_MODULE_5__.generateCueId)(cue.startTime, cue.endTime, cue.text);
    var region = regionElements[cueElement.getAttribute('region')];
    var style = styleElements[cueElement.getAttribute('style')];

    // Apply styles to cue
    var styles = getTtmlStyles(region, style, styleElements);
    var textAlign = styles.textAlign;
    if (textAlign) {
      // cue.positionAlign not settable in FF~2016
      var lineAlign = textAlignToLineAlign[textAlign];
      if (lineAlign) {
        cue.lineAlign = lineAlign;
      }
      cue.align = textAlign;
    }
    _extends(cue, styles);
    return cue;
  }).filter(function (cue) {
    return cue !== null;
  });
}
function getElementCollection(fromElement, parentName, childName) {
  var parent = fromElement.getElementsByTagName(parentName)[0];
  if (parent) {
    return [].slice.call(parent.querySelectorAll(childName));
  }
  return [];
}
function collectionToDictionary(elementsWithId) {
  return elementsWithId.reduce(function (dict, element) {
    var id = element.getAttribute('xml:id');
    if (id) {
      dict[id] = element;
    }
    return dict;
  }, {});
}
function getTextContent(element, trim) {
  return [].slice.call(element.childNodes).reduce(function (str, node, i) {
    var _node$childNodes;
    if (node.nodeName === 'br' && i) {
      return str + '\n';
    }
    if ((_node$childNodes = node.childNodes) !== null && _node$childNodes !== void 0 && _node$childNodes.length) {
      return getTextContent(node, trim);
    } else if (trim) {
      return str + node.textContent.trim().replace(/\s+/g, ' ');
    }
    return str + node.textContent;
  }, '');
}
function getTtmlStyles(region, style, styleElements) {
  var ttsNs = 'http://www.w3.org/ns/ttml#styling';
  var regionStyle = null;
  var styleAttributes = ['displayAlign', 'textAlign', 'color', 'backgroundColor', 'fontSize', 'fontFamily'
  // 'fontWeight',
  // 'lineHeight',
  // 'wrapOption',
  // 'fontStyle',
  // 'direction',
  // 'writingMode'
  ];

  var regionStyleName = region !== null && region !== void 0 && region.hasAttribute('style') ? region.getAttribute('style') : null;
  if (regionStyleName && styleElements.hasOwnProperty(regionStyleName)) {
    regionStyle = styleElements[regionStyleName];
  }
  return styleAttributes.reduce(function (styles, name) {
    var value = getAttributeNS(style, ttsNs, name) || getAttributeNS(region, ttsNs, name) || getAttributeNS(regionStyle, ttsNs, name);
    if (value) {
      styles[name] = value;
    }
    return styles;
  }, {});
}
function getAttributeNS(element, ns, name) {
  if (!element) {
    return null;
  }
  return element.hasAttributeNS(ns, name) ? element.getAttributeNS(ns, name) : null;
}
function timestampParsingError(node) {
  return new Error("Could not parse ttml timestamp " + node);
}
function parseTtmlTime(timeAttributeValue, rateInfo) {
  if (!timeAttributeValue) {
    return null;
  }
  var seconds = (0,_vttparser__WEBPACK_IMPORTED_MODULE_1__.parseTimeStamp)(timeAttributeValue);
  if (seconds === null) {
    if (HMSF_REGEX.test(timeAttributeValue)) {
      seconds = parseHoursMinutesSecondsFrames(timeAttributeValue, rateInfo);
    } else if (TIME_UNIT_REGEX.test(timeAttributeValue)) {
      seconds = parseTimeUnits(timeAttributeValue, rateInfo);
    }
  }
  return seconds;
}
function parseHoursMinutesSecondsFrames(timeAttributeValue, rateInfo) {
  var m = HMSF_REGEX.exec(timeAttributeValue);
  var frames = (m[4] | 0) + (m[5] | 0) / rateInfo.subFrameRate;
  return (m[1] | 0) * 3600 + (m[2] | 0) * 60 + (m[3] | 0) + frames / rateInfo.frameRate;
}
function parseTimeUnits(timeAttributeValue, rateInfo) {
  var m = TIME_UNIT_REGEX.exec(timeAttributeValue);
  var value = Number(m[1]);
  var unit = m[2];
  switch (unit) {
    case 'h':
      return value * 3600;
    case 'm':
      return value * 60;
    case 'ms':
      return value * 1000;
    case 'f':
      return value / rateInfo.frameRate;
    case 't':
      return value / rateInfo.tickRate;
  }
  return value;
}

/***/ }),

/***/ "./src/utils/keysystem-util.ts":
/*!*************************************!*\
  !*** ./src/utils/keysystem-util.ts ***!
  \*************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "changeEndianness": () => (/* binding */ changeEndianness),
/* harmony export */   "convertDataUriToArrayBytes": () => (/* binding */ convertDataUriToArrayBytes),
/* harmony export */   "strToUtf8array": () => (/* binding */ strToUtf8array)
/* harmony export */ });
/* harmony import */ var _numeric_encoding_utils__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./numeric-encoding-utils */ "./src/utils/numeric-encoding-utils.ts");

function getKeyIdBytes(str) {
  var keyIdbytes = strToUtf8array(str).subarray(0, 16);
  var paddedkeyIdbytes = new Uint8Array(16);
  paddedkeyIdbytes.set(keyIdbytes, 16 - keyIdbytes.length);
  return paddedkeyIdbytes;
}
function changeEndianness(keyId) {
  var swap = function swap(array, from, to) {
    var cur = array[from];
    array[from] = array[to];
    array[to] = cur;
  };
  swap(keyId, 0, 3);
  swap(keyId, 1, 2);
  swap(keyId, 4, 5);
  swap(keyId, 6, 7);
}
function convertDataUriToArrayBytes(uri) {
  // data:[<media type][;attribute=value][;base64],<data>
  var colonsplit = uri.split(':');
  var keydata = null;
  if (colonsplit[0] === 'data' && colonsplit.length === 2) {
    var semicolonsplit = colonsplit[1].split(';');
    var commasplit = semicolonsplit[semicolonsplit.length - 1].split(',');
    if (commasplit.length === 2) {
      var isbase64 = commasplit[0] === 'base64';
      var data = commasplit[1];
      if (isbase64) {
        semicolonsplit.splice(-1, 1); // remove from processing
        keydata = (0,_numeric_encoding_utils__WEBPACK_IMPORTED_MODULE_0__.base64Decode)(data);
      } else {
        keydata = getKeyIdBytes(data);
      }
    }
  }
  return keydata;
}
function strToUtf8array(str) {
  return Uint8Array.from(unescape(encodeURIComponent(str)), function (c) {
    return c.charCodeAt(0);
  });
}

/***/ }),

/***/ "./src/utils/logger.ts":
/*!*****************************!*\
  !*** ./src/utils/logger.ts ***!
  \*****************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "enableLogs": () => (/* binding */ enableLogs),
/* harmony export */   "logger": () => (/* binding */ logger)
/* harmony export */ });
var noop = function noop() {};
var fakeLogger = {
  trace: noop,
  debug: noop,
  log: noop,
  warn: noop,
  info: noop,
  error: noop
};
var exportedLogger = fakeLogger;

// let lastCallTime;
// function formatMsgWithTimeInfo(type, msg) {
//   const now = Date.now();
//   const diff = lastCallTime ? '+' + (now - lastCallTime) : '0';
//   lastCallTime = now;
//   msg = (new Date(now)).toISOString() + ' | [' +  type + '] > ' + msg + ' ( ' + diff + ' ms )';
//   return msg;
// }

function consolePrintFn(type) {
  var func = self.console[type];
  if (func) {
    return func.bind(self.console, "[" + type + "] >");
  }
  return noop;
}
function exportLoggerFunctions(debugConfig) {
  for (var _len = arguments.length, functions = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
    functions[_key - 1] = arguments[_key];
  }
  functions.forEach(function (type) {
    exportedLogger[type] = debugConfig[type] ? debugConfig[type].bind(debugConfig) : consolePrintFn(type);
  });
}
function enableLogs(debugConfig, id) {
  // check that console is available
  if (self.console && debugConfig === true || typeof debugConfig === 'object') {
    exportLoggerFunctions(debugConfig,
    // Remove out from list here to hard-disable a log-level
    // 'trace',
    'debug', 'log', 'info', 'warn', 'error');
    // Some browsers don't allow to use bind on console object anyway
    // fallback to default if needed
    try {
      exportedLogger.log("Debug logs enabled for \"" + id + "\"");
    } catch (e) {
      exportedLogger = fakeLogger;
    }
  } else {
    exportedLogger = fakeLogger;
  }
}
var logger = exportedLogger;

/***/ }),

/***/ "./src/utils/mediakeys-helper.ts":
/*!***************************************!*\
  !*** ./src/utils/mediakeys-helper.ts ***!
  \***************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "KeySystemFormats": () => (/* binding */ KeySystemFormats),
/* harmony export */   "KeySystemIds": () => (/* binding */ KeySystemIds),
/* harmony export */   "KeySystems": () => (/* binding */ KeySystems),
/* harmony export */   "getKeySystemsForConfig": () => (/* binding */ getKeySystemsForConfig),
/* harmony export */   "getSupportedMediaKeySystemConfigurations": () => (/* binding */ getSupportedMediaKeySystemConfigurations),
/* harmony export */   "keySystemDomainToKeySystemFormat": () => (/* binding */ keySystemDomainToKeySystemFormat),
/* harmony export */   "keySystemFormatToKeySystemDomain": () => (/* binding */ keySystemFormatToKeySystemDomain),
/* harmony export */   "keySystemIdToKeySystemDomain": () => (/* binding */ keySystemIdToKeySystemDomain),
/* harmony export */   "requestMediaKeySystemAccess": () => (/* binding */ requestMediaKeySystemAccess)
/* harmony export */ });
/**
 * @see https://developer.mozilla.org/en-US/docs/Web/API/Navigator/requestMediaKeySystemAccess
 */
var KeySystems;

// Playlist #EXT-X-KEY KEYFORMAT values
(function (KeySystems) {
  KeySystems["CLEARKEY"] = "org.w3.clearkey";
  KeySystems["FAIRPLAY"] = "com.apple.fps";
  KeySystems["PLAYREADY"] = "com.microsoft.playready";
  KeySystems["WIDEVINE"] = "com.widevine.alpha";
})(KeySystems || (KeySystems = {}));
var KeySystemFormats;
(function (KeySystemFormats) {
  KeySystemFormats["CLEARKEY"] = "org.w3.clearkey";
  KeySystemFormats["FAIRPLAY"] = "com.apple.streamingkeydelivery";
  KeySystemFormats["PLAYREADY"] = "com.microsoft.playready";
  KeySystemFormats["WIDEVINE"] = "urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed";
})(KeySystemFormats || (KeySystemFormats = {}));
function keySystemFormatToKeySystemDomain(format) {
  switch (format) {
    case KeySystemFormats.FAIRPLAY:
      return KeySystems.FAIRPLAY;
    case KeySystemFormats.PLAYREADY:
      return KeySystems.PLAYREADY;
    case KeySystemFormats.WIDEVINE:
      return KeySystems.WIDEVINE;
    case KeySystemFormats.CLEARKEY:
      return KeySystems.CLEARKEY;
  }
}

// System IDs for which we can extract a key ID from "encrypted" event PSSH
var KeySystemIds;
(function (KeySystemIds) {
  KeySystemIds["WIDEVINE"] = "edef8ba979d64acea3c827dcd51d21ed";
})(KeySystemIds || (KeySystemIds = {}));
function keySystemIdToKeySystemDomain(systemId) {
  if (systemId === KeySystemIds.WIDEVINE) {
    return KeySystems.WIDEVINE;
    // } else if (systemId === KeySystemIds.PLAYREADY) {
    //   return KeySystems.PLAYREADY;
    // } else if (systemId === KeySystemIds.CENC || systemId === KeySystemIds.CLEARKEY) {
    //   return KeySystems.CLEARKEY;
  }
}

function keySystemDomainToKeySystemFormat(keySystem) {
  switch (keySystem) {
    case KeySystems.FAIRPLAY:
      return KeySystemFormats.FAIRPLAY;
    case KeySystems.PLAYREADY:
      return KeySystemFormats.PLAYREADY;
    case KeySystems.WIDEVINE:
      return KeySystemFormats.WIDEVINE;
    case KeySystems.CLEARKEY:
      return KeySystemFormats.CLEARKEY;
  }
}
function getKeySystemsForConfig(config) {
  var drmSystems = config.drmSystems,
    widevineLicenseUrl = config.widevineLicenseUrl;
  var keySystemsToAttempt = drmSystems ? [KeySystems.FAIRPLAY, KeySystems.WIDEVINE, KeySystems.PLAYREADY, KeySystems.CLEARKEY].filter(function (keySystem) {
    return !!drmSystems[keySystem];
  }) : [];
  if (!keySystemsToAttempt[KeySystems.WIDEVINE] && widevineLicenseUrl) {
    keySystemsToAttempt.push(KeySystems.WIDEVINE);
  }
  return keySystemsToAttempt;
}
var requestMediaKeySystemAccess = function () {
  if (typeof self !== 'undefined' && self.navigator && self.navigator.requestMediaKeySystemAccess) {
    return self.navigator.requestMediaKeySystemAccess.bind(self.navigator);
  } else {
    return null;
  }
}();

/**
 * @see https://developer.mozilla.org/en-US/docs/Web/API/MediaKeySystemConfiguration
 */
function getSupportedMediaKeySystemConfigurations(keySystem, audioCodecs, videoCodecs, drmSystemOptions) {
  var initDataTypes;
  switch (keySystem) {
    case KeySystems.FAIRPLAY:
      initDataTypes = ['cenc', 'sinf'];
      break;
    case KeySystems.WIDEVINE:
    case KeySystems.PLAYREADY:
      initDataTypes = ['cenc'];
      break;
    case KeySystems.CLEARKEY:
      initDataTypes = ['cenc', 'keyids'];
      break;
    default:
      throw new Error("Unknown key-system: " + keySystem);
  }
  return createMediaKeySystemConfigurations(initDataTypes, audioCodecs, videoCodecs, drmSystemOptions);
}
function createMediaKeySystemConfigurations(initDataTypes, audioCodecs, videoCodecs, drmSystemOptions) {
  var baseConfig = {
    initDataTypes: initDataTypes,
    persistentState: drmSystemOptions.persistentState || 'not-allowed',
    distinctiveIdentifier: drmSystemOptions.distinctiveIdentifier || 'not-allowed',
    sessionTypes: drmSystemOptions.sessionTypes || [drmSystemOptions.sessionType || 'temporary'],
    audioCapabilities: audioCodecs.map(function (codec) {
      return {
        contentType: "audio/mp4; codecs=\"" + codec + "\"",
        robustness: drmSystemOptions.audioRobustness || '',
        encryptionScheme: drmSystemOptions.audioEncryptionScheme || null
      };
    }),
    videoCapabilities: videoCodecs.map(function (codec) {
      return {
        contentType: "video/mp4; codecs=\"" + codec + "\"",
        robustness: drmSystemOptions.videoRobustness || '',
        encryptionScheme: drmSystemOptions.videoEncryptionScheme || null
      };
    })
  };
  return [baseConfig];
}

/***/ }),

/***/ "./src/utils/mediasource-helper.ts":
/*!*****************************************!*\
  !*** ./src/utils/mediasource-helper.ts ***!
  \*****************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "getMediaSource": () => (/* binding */ getMediaSource)
/* harmony export */ });
/**
 * MediaSource helper
 */

function getMediaSource() {
  return self.MediaSource || self.WebKitMediaSource;
}

/***/ }),

/***/ "./src/utils/mp4-tools.ts":
/*!********************************!*\
  !*** ./src/utils/mp4-tools.ts ***!
  \********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "RemuxerTrackIdConfig": () => (/* binding */ RemuxerTrackIdConfig),
/* harmony export */   "appendUint8Array": () => (/* binding */ appendUint8Array),
/* harmony export */   "bin2str": () => (/* binding */ bin2str),
/* harmony export */   "computeRawDurationFromSamples": () => (/* binding */ computeRawDurationFromSamples),
/* harmony export */   "discardEPB": () => (/* binding */ discardEPB),
/* harmony export */   "findBox": () => (/* binding */ findBox),
/* harmony export */   "getDuration": () => (/* binding */ getDuration),
/* harmony export */   "getStartDTS": () => (/* binding */ getStartDTS),
/* harmony export */   "mp4Box": () => (/* binding */ mp4Box),
/* harmony export */   "mp4pssh": () => (/* binding */ mp4pssh),
/* harmony export */   "offsetStartDTS": () => (/* binding */ offsetStartDTS),
/* harmony export */   "parseEmsg": () => (/* binding */ parseEmsg),
/* harmony export */   "parseInitSegment": () => (/* binding */ parseInitSegment),
/* harmony export */   "parsePssh": () => (/* binding */ parsePssh),
/* harmony export */   "parseSEIMessageFromNALu": () => (/* binding */ parseSEIMessageFromNALu),
/* harmony export */   "parseSamples": () => (/* binding */ parseSamples),
/* harmony export */   "parseSegmentIndex": () => (/* binding */ parseSegmentIndex),
/* harmony export */   "parseSinf": () => (/* binding */ parseSinf),
/* harmony export */   "patchEncyptionData": () => (/* binding */ patchEncyptionData),
/* harmony export */   "readSint32": () => (/* binding */ readSint32),
/* harmony export */   "readUint16": () => (/* binding */ readUint16),
/* harmony export */   "readUint32": () => (/* binding */ readUint32),
/* harmony export */   "segmentValidRange": () => (/* binding */ segmentValidRange),
/* harmony export */   "writeUint32": () => (/* binding */ writeUint32)
/* harmony export */ });
/* harmony import */ var _loader_fragment__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../loader/fragment */ "./src/loader/fragment.ts");
/* harmony import */ var _typed_array__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./typed-array */ "./src/utils/typed-array.ts");
/* harmony import */ var _demux_id3__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../demux/id3 */ "./src/demux/id3.ts");
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _hex__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ./hex */ "./src/utils/hex.ts");





var UINT32_MAX = Math.pow(2, 32) - 1;
var push = [].push;

// We are using fixed track IDs for driving the MP4 remuxer
// instead of following the TS PIDs.
// There is no reason not to do this and some browsers/SourceBuffer-demuxers
// may not like if there are TrackID "switches"
// See https://github.com/video-dev/hls.js/issues/1331
// Here we are mapping our internal track types to constant MP4 track IDs
// With MSE currently one can only have one track of each, and we are muxing
// whatever video/audio rendition in them.
var RemuxerTrackIdConfig = {
  video: 1,
  audio: 2,
  id3: 3,
  text: 4
};
function bin2str(data) {
  return String.fromCharCode.apply(null, data);
}
function readUint16(buffer, offset) {
  var val = buffer[offset] << 8 | buffer[offset + 1];
  return val < 0 ? 65536 + val : val;
}
function readUint32(buffer, offset) {
  var val = readSint32(buffer, offset);
  return val < 0 ? 4294967296 + val : val;
}
function readSint32(buffer, offset) {
  return buffer[offset] << 24 | buffer[offset + 1] << 16 | buffer[offset + 2] << 8 | buffer[offset + 3];
}
function writeUint32(buffer, offset, value) {
  buffer[offset] = value >> 24;
  buffer[offset + 1] = value >> 16 & 0xff;
  buffer[offset + 2] = value >> 8 & 0xff;
  buffer[offset + 3] = value & 0xff;
}

// Find the data for a box specified by its path
function findBox(data, path) {
  var results = [];
  if (!path.length) {
    // short-circuit the search for empty paths
    return results;
  }
  var end = data.byteLength;
  for (var i = 0; i < end;) {
    var size = readUint32(data, i);
    var type = bin2str(data.subarray(i + 4, i + 8));
    var endbox = size > 1 ? i + size : end;
    if (type === path[0]) {
      if (path.length === 1) {
        // this is the end of the path and we've found the box we were
        // looking for
        results.push(data.subarray(i + 8, endbox));
      } else {
        // recursively search for the next box along the path
        var subresults = findBox(data.subarray(i + 8, endbox), path.slice(1));
        if (subresults.length) {
          push.apply(results, subresults);
        }
      }
    }
    i = endbox;
  }

  // we've finished searching all of data
  return results;
}
function parseSegmentIndex(sidx) {
  var references = [];
  var version = sidx[0];

  // set initial offset, we skip the reference ID (not needed)
  var index = 8;
  var timescale = readUint32(sidx, index);
  index += 4;

  // TODO: parse earliestPresentationTime and firstOffset
  // usually zero in our case
  var earliestPresentationTime = 0;
  var firstOffset = 0;
  if (version === 0) {
    index += 8;
  } else {
    index += 16;
  }

  // skip reserved
  index += 2;
  var startByte = sidx.length + firstOffset;
  var referencesCount = readUint16(sidx, index);
  index += 2;
  for (var i = 0; i < referencesCount; i++) {
    var referenceIndex = index;
    var referenceInfo = readUint32(sidx, referenceIndex);
    referenceIndex += 4;
    var referenceSize = referenceInfo & 0x7fffffff;
    var referenceType = (referenceInfo & 0x80000000) >>> 31;
    if (referenceType === 1) {
      // eslint-disable-next-line no-console
      console.warn('SIDX has hierarchical references (not supported)');
      return null;
    }
    var subsegmentDuration = readUint32(sidx, referenceIndex);
    referenceIndex += 4;
    references.push({
      referenceSize: referenceSize,
      subsegmentDuration: subsegmentDuration,
      // unscaled
      info: {
        duration: subsegmentDuration / timescale,
        start: startByte,
        end: startByte + referenceSize - 1
      }
    });
    startByte += referenceSize;

    // Skipping 1 bit for |startsWithSap|, 3 bits for |sapType|, and 28 bits
    // for |sapDelta|.
    referenceIndex += 4;

    // skip to next ref
    index = referenceIndex;
  }
  return {
    earliestPresentationTime: earliestPresentationTime,
    timescale: timescale,
    version: version,
    referencesCount: referencesCount,
    references: references
  };
}

/**
 * Parses an MP4 initialization segment and extracts stream type and
 * timescale values for any declared tracks. Timescale values indicate the
 * number of clock ticks per second to assume for time-based values
 * elsewhere in the MP4.
 *
 * To determine the start time of an MP4, you need two pieces of
 * information: the timescale unit and the earliest base media decode
 * time. Multiple timescales can be specified within an MP4 but the
 * base media decode time is always expressed in the timescale from
 * the media header box for the track:
 * ```
 * moov > trak > mdia > mdhd.timescale
 * moov > trak > mdia > hdlr
 * ```
 * @param initSegment {Uint8Array} the bytes of the init segment
 * @return {InitData} a hash of track type to timescale values or null if
 * the init segment is malformed.
 */

function parseInitSegment(initSegment) {
  var result = [];
  var traks = findBox(initSegment, ['moov', 'trak']);
  for (var i = 0; i < traks.length; i++) {
    var trak = traks[i];
    var tkhd = findBox(trak, ['tkhd'])[0];
    if (tkhd) {
      var version = tkhd[0];
      var _index = version === 0 ? 12 : 20;
      var trackId = readUint32(tkhd, _index);
      var mdhd = findBox(trak, ['mdia', 'mdhd'])[0];
      if (mdhd) {
        version = mdhd[0];
        _index = version === 0 ? 12 : 20;
        var timescale = readUint32(mdhd, _index);
        var hdlr = findBox(trak, ['mdia', 'hdlr'])[0];
        if (hdlr) {
          var hdlrType = bin2str(hdlr.subarray(8, 12));
          var type = {
            soun: _loader_fragment__WEBPACK_IMPORTED_MODULE_0__.ElementaryStreamTypes.AUDIO,
            vide: _loader_fragment__WEBPACK_IMPORTED_MODULE_0__.ElementaryStreamTypes.VIDEO
          }[hdlrType];
          if (type) {
            // Parse codec details
            var stsd = findBox(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];
            var codec = void 0;
            if (stsd) {
              codec = bin2str(stsd.subarray(12, 16));
              // TODO: Parse codec details to be able to build MIME type.
              // stsd.start += 8;
              // const codecBox = findBox(stsd, [codec])[0];
              // if (codecBox) {
              //   TODO: Codec parsing support for avc1, mp4a, hevc, av01...
              // }
            }

            result[trackId] = {
              timescale: timescale,
              type: type
            };
            result[type] = {
              timescale: timescale,
              id: trackId,
              codec: codec
            };
          }
        }
      }
    }
  }
  var trex = findBox(initSegment, ['moov', 'mvex', 'trex']);
  trex.forEach(function (trex) {
    var trackId = readUint32(trex, 4);
    var track = result[trackId];
    if (track) {
      track.default = {
        duration: readUint32(trex, 12),
        flags: readUint32(trex, 20)
      };
    }
  });
  return result;
}
function patchEncyptionData(initSegment, decryptdata) {
  if (!initSegment || !decryptdata) {
    return initSegment;
  }
  var keyId = decryptdata.keyId;
  if (keyId && decryptdata.isCommonEncryption) {
    var traks = findBox(initSegment, ['moov', 'trak']);
    traks.forEach(function (trak) {
      var stsd = findBox(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];

      // skip the sample entry count
      var sampleEntries = stsd.subarray(8);
      var encBoxes = findBox(sampleEntries, ['enca']);
      var isAudio = encBoxes.length > 0;
      if (!isAudio) {
        encBoxes = findBox(sampleEntries, ['encv']);
      }
      encBoxes.forEach(function (enc) {
        var encBoxChildren = isAudio ? enc.subarray(28) : enc.subarray(78);
        var sinfBoxes = findBox(encBoxChildren, ['sinf']);
        sinfBoxes.forEach(function (sinf) {
          var tenc = parseSinf(sinf);
          if (tenc) {
            // Look for default key id (keyID offset is always 8 within the tenc box):
            var tencKeyId = tenc.subarray(8, 24);
            if (!tencKeyId.some(function (b) {
              return b !== 0;
            })) {
              _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.log("[eme] Patching keyId in 'enc" + (isAudio ? 'a' : 'v') + ">sinf>>tenc' box: " + _hex__WEBPACK_IMPORTED_MODULE_4__["default"].hexDump(tencKeyId) + " -> " + _hex__WEBPACK_IMPORTED_MODULE_4__["default"].hexDump(keyId));
              tenc.set(keyId, 8);
            }
          }
        });
      });
    });
  }
  return initSegment;
}
function parseSinf(sinf) {
  var schm = findBox(sinf, ['schm'])[0];
  if (schm) {
    var scheme = bin2str(schm.subarray(4, 8));
    if (scheme === 'cbcs' || scheme === 'cenc') {
      return findBox(sinf, ['schi', 'tenc'])[0];
    }
  }
  _utils_logger__WEBPACK_IMPORTED_MODULE_3__.logger.error("[eme] missing 'schm' box");
  return null;
}

/**
 * Determine the base media decode start time, in seconds, for an MP4
 * fragment. If multiple fragments are specified, the earliest time is
 * returned.
 *
 * The base media decode time can be parsed from track fragment
 * metadata:
 * ```
 * moof > traf > tfdt.baseMediaDecodeTime
 * ```
 * It requires the timescale value from the mdhd to interpret.
 *
 * @param initData {InitData} a hash of track type to timescale values
 * @param fmp4 {Uint8Array} the bytes of the mp4 fragment
 * @return {number} the earliest base media decode start time for the
 * fragment, in seconds
 */
function getStartDTS(initData, fmp4) {
  // we need info from two children of each track fragment box
  return findBox(fmp4, ['moof', 'traf']).reduce(function (result, traf) {
    var tfdt = findBox(traf, ['tfdt'])[0];
    var version = tfdt[0];
    var start = findBox(traf, ['tfhd']).reduce(function (result, tfhd) {
      // get the track id from the tfhd
      var id = readUint32(tfhd, 4);
      var track = initData[id];
      if (track) {
        var baseTime = readUint32(tfdt, 4);
        if (version === 1) {
          baseTime *= Math.pow(2, 32);
          baseTime += readUint32(tfdt, 8);
        }
        // assume a 90kHz clock if no timescale was specified
        var scale = track.timescale || 90e3;
        // convert base time to seconds
        var startTime = baseTime / scale;
        if (isFinite(startTime) && (result === null || startTime < result)) {
          return startTime;
        }
      }
      return result;
    }, null);
    if (start !== null && isFinite(start) && (result === null || start < result)) {
      return start;
    }
    return result;
  }, null) || 0;
}

/*
  For Reference:
  aligned(8) class TrackFragmentHeaderBox
           extends FullBox(‘tfhd’, 0, tf_flags){
     unsigned int(32)  track_ID;
     // all the following are optional fields
     unsigned int(64)  base_data_offset;
     unsigned int(32)  sample_description_index;
     unsigned int(32)  default_sample_duration;
     unsigned int(32)  default_sample_size;
     unsigned int(32)  default_sample_flags
  }
 */
function getDuration(data, initData) {
  var rawDuration = 0;
  var videoDuration = 0;
  var audioDuration = 0;
  var trafs = findBox(data, ['moof', 'traf']);
  for (var i = 0; i < trafs.length; i++) {
    var traf = trafs[i];
    // There is only one tfhd & trun per traf
    // This is true for CMAF style content, and we should perhaps check the ftyp
    // and only look for a single trun then, but for ISOBMFF we should check
    // for multiple track runs.
    var tfhd = findBox(traf, ['tfhd'])[0];
    // get the track id from the tfhd
    var id = readUint32(tfhd, 4);
    var track = initData[id];
    if (!track) {
      continue;
    }
    var trackDefault = track.default;
    var tfhdFlags = readUint32(tfhd, 0) | (trackDefault === null || trackDefault === void 0 ? void 0 : trackDefault.flags);
    var sampleDuration = trackDefault === null || trackDefault === void 0 ? void 0 : trackDefault.duration;
    if (tfhdFlags & 0x000008) {
      // 0x000008 indicates the presence of the default_sample_duration field
      if (tfhdFlags & 0x000002) {
        // 0x000002 indicates the presence of the sample_description_index field, which precedes default_sample_duration
        // If present, the default_sample_duration exists at byte offset 12
        sampleDuration = readUint32(tfhd, 12);
      } else {
        // Otherwise, the duration is at byte offset 8
        sampleDuration = readUint32(tfhd, 8);
      }
    }
    // assume a 90kHz clock if no timescale was specified
    var timescale = track.timescale || 90e3;
    var truns = findBox(traf, ['trun']);
    for (var j = 0; j < truns.length; j++) {
      rawDuration = computeRawDurationFromSamples(truns[j]);
      if (!rawDuration && sampleDuration) {
        var sampleCount = readUint32(truns[j], 4);
        rawDuration = sampleDuration * sampleCount;
      }
      if (track.type === _loader_fragment__WEBPACK_IMPORTED_MODULE_0__.ElementaryStreamTypes.VIDEO) {
        videoDuration += rawDuration / timescale;
      } else if (track.type === _loader_fragment__WEBPACK_IMPORTED_MODULE_0__.ElementaryStreamTypes.AUDIO) {
        audioDuration += rawDuration / timescale;
      }
    }
  }
  if (videoDuration === 0 && audioDuration === 0) {
    // If duration samples are not available in the traf use sidx subsegment_duration
    var sidxDuration = 0;
    var sidxs = findBox(data, ['sidx']);
    for (var _i = 0; _i < sidxs.length; _i++) {
      var sidx = parseSegmentIndex(sidxs[_i]);
      if (sidx !== null && sidx !== void 0 && sidx.references) {
        sidxDuration += sidx.references.reduce(function (dur, ref) {
          return dur + ref.info.duration || 0;
        }, 0);
      }
    }
    return sidxDuration;
  }
  if (videoDuration) {
    return videoDuration;
  }
  return audioDuration;
}

/*
  For Reference:
  aligned(8) class TrackRunBox
           extends FullBox(‘trun’, version, tr_flags) {
     unsigned int(32)  sample_count;
     // the following are optional fields
     signed int(32) data_offset;
     unsigned int(32)  first_sample_flags;
     // all fields in the following array are optional
     {
        unsigned int(32)  sample_duration;
        unsigned int(32)  sample_size;
        unsigned int(32)  sample_flags
        if (version == 0)
           { unsigned int(32)
        else
           { signed int(32)
     }[ sample_count ]
  }
 */
function computeRawDurationFromSamples(trun) {
  var flags = readUint32(trun, 0);
  // Flags are at offset 0, non-optional sample_count is at offset 4. Therefore we start 8 bytes in.
  // Each field is an int32, which is 4 bytes
  var offset = 8;
  // data-offset-present flag
  if (flags & 0x000001) {
    offset += 4;
  }
  // first-sample-flags-present flag
  if (flags & 0x000004) {
    offset += 4;
  }
  var duration = 0;
  var sampleCount = readUint32(trun, 4);
  for (var i = 0; i < sampleCount; i++) {
    // sample-duration-present flag
    if (flags & 0x000100) {
      var sampleDuration = readUint32(trun, offset);
      duration += sampleDuration;
      offset += 4;
    }
    // sample-size-present flag
    if (flags & 0x000200) {
      offset += 4;
    }
    // sample-flags-present flag
    if (flags & 0x000400) {
      offset += 4;
    }
    // sample-composition-time-offsets-present flag
    if (flags & 0x000800) {
      offset += 4;
    }
  }
  return duration;
}
function offsetStartDTS(initData, fmp4, timeOffset) {
  findBox(fmp4, ['moof', 'traf']).forEach(function (traf) {
    findBox(traf, ['tfhd']).forEach(function (tfhd) {
      // get the track id from the tfhd
      var id = readUint32(tfhd, 4);
      var track = initData[id];
      if (!track) {
        return;
      }
      // assume a 90kHz clock if no timescale was specified
      var timescale = track.timescale || 90e3;
      // get the base media decode time from the tfdt
      findBox(traf, ['tfdt']).forEach(function (tfdt) {
        var version = tfdt[0];
        var baseMediaDecodeTime = readUint32(tfdt, 4);
        if (version === 0) {
          baseMediaDecodeTime -= timeOffset * timescale;
          baseMediaDecodeTime = Math.max(baseMediaDecodeTime, 0);
          writeUint32(tfdt, 4, baseMediaDecodeTime);
        } else {
          baseMediaDecodeTime *= Math.pow(2, 32);
          baseMediaDecodeTime += readUint32(tfdt, 8);
          baseMediaDecodeTime -= timeOffset * timescale;
          baseMediaDecodeTime = Math.max(baseMediaDecodeTime, 0);
          var upper = Math.floor(baseMediaDecodeTime / (UINT32_MAX + 1));
          var lower = Math.floor(baseMediaDecodeTime % (UINT32_MAX + 1));
          writeUint32(tfdt, 4, upper);
          writeUint32(tfdt, 8, lower);
        }
      });
    });
  });
}

// TODO: Check if the last moof+mdat pair is part of the valid range
function segmentValidRange(data) {
  var segmentedRange = {
    valid: null,
    remainder: null
  };
  var moofs = findBox(data, ['moof']);
  if (!moofs) {
    return segmentedRange;
  } else if (moofs.length < 2) {
    segmentedRange.remainder = data;
    return segmentedRange;
  }
  var last = moofs[moofs.length - 1];
  // Offset by 8 bytes; findBox offsets the start by as much
  segmentedRange.valid = (0,_typed_array__WEBPACK_IMPORTED_MODULE_1__.sliceUint8)(data, 0, last.byteOffset - 8);
  segmentedRange.remainder = (0,_typed_array__WEBPACK_IMPORTED_MODULE_1__.sliceUint8)(data, last.byteOffset - 8);
  return segmentedRange;
}
function appendUint8Array(data1, data2) {
  var temp = new Uint8Array(data1.length + data2.length);
  temp.set(data1);
  temp.set(data2, data1.length);
  return temp;
}
function parseSamples(timeOffset, track) {
  var seiSamples = [];
  var videoData = track.samples;
  var timescale = track.timescale;
  var trackId = track.id;
  var isHEVCFlavor = false;
  var moofs = findBox(videoData, ['moof']);
  moofs.map(function (moof) {
    var moofOffset = moof.byteOffset - 8;
    var trafs = findBox(moof, ['traf']);
    trafs.map(function (traf) {
      // get the base media decode time from the tfdt
      var baseTime = findBox(traf, ['tfdt']).map(function (tfdt) {
        var version = tfdt[0];
        var result = readUint32(tfdt, 4);
        if (version === 1) {
          result *= Math.pow(2, 32);
          result += readUint32(tfdt, 8);
        }
        return result / timescale;
      })[0];
      if (baseTime !== undefined) {
        timeOffset = baseTime;
      }
      return findBox(traf, ['tfhd']).map(function (tfhd) {
        var id = readUint32(tfhd, 4);
        var tfhdFlags = readUint32(tfhd, 0) & 0xffffff;
        var baseDataOffsetPresent = (tfhdFlags & 0x000001) !== 0;
        var sampleDescriptionIndexPresent = (tfhdFlags & 0x000002) !== 0;
        var defaultSampleDurationPresent = (tfhdFlags & 0x000008) !== 0;
        var defaultSampleDuration = 0;
        var defaultSampleSizePresent = (tfhdFlags & 0x000010) !== 0;
        var defaultSampleSize = 0;
        var defaultSampleFlagsPresent = (tfhdFlags & 0x000020) !== 0;
        var tfhdOffset = 8;
        if (id === trackId) {
          if (baseDataOffsetPresent) {
            tfhdOffset += 8;
          }
          if (sampleDescriptionIndexPresent) {
            tfhdOffset += 4;
          }
          if (defaultSampleDurationPresent) {
            defaultSampleDuration = readUint32(tfhd, tfhdOffset);
            tfhdOffset += 4;
          }
          if (defaultSampleSizePresent) {
            defaultSampleSize = readUint32(tfhd, tfhdOffset);
            tfhdOffset += 4;
          }
          if (defaultSampleFlagsPresent) {
            tfhdOffset += 4;
          }
          if (track.type === 'video') {
            isHEVCFlavor = isHEVC(track.codec);
          }
          findBox(traf, ['trun']).map(function (trun) {
            var version = trun[0];
            var flags = readUint32(trun, 0) & 0xffffff;
            var dataOffsetPresent = (flags & 0x000001) !== 0;
            var dataOffset = 0;
            var firstSampleFlagsPresent = (flags & 0x000004) !== 0;
            var sampleDurationPresent = (flags & 0x000100) !== 0;
            var sampleDuration = 0;
            var sampleSizePresent = (flags & 0x000200) !== 0;
            var sampleSize = 0;
            var sampleFlagsPresent = (flags & 0x000400) !== 0;
            var sampleCompositionOffsetsPresent = (flags & 0x000800) !== 0;
            var compositionOffset = 0;
            var sampleCount = readUint32(trun, 4);
            var trunOffset = 8; // past version, flags, and sample count

            if (dataOffsetPresent) {
              dataOffset = readUint32(trun, trunOffset);
              trunOffset += 4;
            }
            if (firstSampleFlagsPresent) {
              trunOffset += 4;
            }
            var sampleOffset = dataOffset + moofOffset;
            for (var ix = 0; ix < sampleCount; ix++) {
              if (sampleDurationPresent) {
                sampleDuration = readUint32(trun, trunOffset);
                trunOffset += 4;
              } else {
                sampleDuration = defaultSampleDuration;
              }
              if (sampleSizePresent) {
                sampleSize = readUint32(trun, trunOffset);
                trunOffset += 4;
              } else {
                sampleSize = defaultSampleSize;
              }
              if (sampleFlagsPresent) {
                trunOffset += 4;
              }
              if (sampleCompositionOffsetsPresent) {
                if (version === 0) {
                  compositionOffset = readUint32(trun, trunOffset);
                } else {
                  compositionOffset = readSint32(trun, trunOffset);
                }
                trunOffset += 4;
              }
              if (track.type === _loader_fragment__WEBPACK_IMPORTED_MODULE_0__.ElementaryStreamTypes.VIDEO) {
                var naluTotalSize = 0;
                while (naluTotalSize < sampleSize) {
                  var naluSize = readUint32(videoData, sampleOffset);
                  sampleOffset += 4;
                  if (isSEIMessage(isHEVCFlavor, videoData[sampleOffset])) {
                    var data = videoData.subarray(sampleOffset, sampleOffset + naluSize);
                    parseSEIMessageFromNALu(data, isHEVCFlavor ? 2 : 1, timeOffset + compositionOffset / timescale, seiSamples);
                  }
                  sampleOffset += naluSize;
                  naluTotalSize += naluSize + 4;
                }
              }
              timeOffset += sampleDuration / timescale;
            }
          });
        }
      });
    });
  });
  return seiSamples;
}
function isHEVC(codec) {
  if (!codec) {
    return false;
  }
  var delimit = codec.indexOf('.');
  var baseCodec = delimit < 0 ? codec : codec.substring(0, delimit);
  return baseCodec === 'hvc1' || baseCodec === 'hev1' ||
  // Dolby Vision
  baseCodec === 'dvh1' || baseCodec === 'dvhe';
}
function isSEIMessage(isHEVCFlavor, naluHeader) {
  if (isHEVCFlavor) {
    var naluType = naluHeader >> 1 & 0x3f;
    return naluType === 39 || naluType === 40;
  } else {
    var _naluType = naluHeader & 0x1f;
    return _naluType === 6;
  }
}
function parseSEIMessageFromNALu(unescapedData, headerSize, pts, samples) {
  var data = discardEPB(unescapedData);
  var seiPtr = 0;
  // skip nal header
  seiPtr += headerSize;
  var payloadType = 0;
  var payloadSize = 0;
  var endOfCaptions = false;
  var b = 0;
  while (seiPtr < data.length) {
    payloadType = 0;
    do {
      if (seiPtr >= data.length) {
        break;
      }
      b = data[seiPtr++];
      payloadType += b;
    } while (b === 0xff);

    // Parse payload size.
    payloadSize = 0;
    do {
      if (seiPtr >= data.length) {
        break;
      }
      b = data[seiPtr++];
      payloadSize += b;
    } while (b === 0xff);
    var leftOver = data.length - seiPtr;
    if (!endOfCaptions && payloadType === 4 && seiPtr < data.length) {
      endOfCaptions = true;
      var countryCode = data[seiPtr++];
      if (countryCode === 181) {
        var providerCode = readUint16(data, seiPtr);
        seiPtr += 2;
        if (providerCode === 49) {
          var userStructure = readUint32(data, seiPtr);
          seiPtr += 4;
          if (userStructure === 0x47413934) {
            var userDataType = data[seiPtr++];

            // Raw CEA-608 bytes wrapped in CEA-708 packet
            if (userDataType === 3) {
              var firstByte = data[seiPtr++];
              var totalCCs = 0x1f & firstByte;
              var enabled = 0x40 & firstByte;
              var totalBytes = enabled ? 2 + totalCCs * 3 : 0;
              var byteArray = new Uint8Array(totalBytes);
              if (enabled) {
                byteArray[0] = firstByte;
                for (var i = 1; i < totalBytes; i++) {
                  byteArray[i] = data[seiPtr++];
                }
              }
              samples.push({
                type: userDataType,
                payloadType: payloadType,
                pts: pts,
                bytes: byteArray
              });
            }
          }
        }
      }
    } else if (payloadType === 5 && payloadSize < leftOver) {
      endOfCaptions = true;
      if (payloadSize > 16) {
        var uuidStrArray = [];
        for (var _i2 = 0; _i2 < 16; _i2++) {
          var _b = data[seiPtr++].toString(16);
          uuidStrArray.push(_b.length == 1 ? '0' + _b : _b);
          if (_i2 === 3 || _i2 === 5 || _i2 === 7 || _i2 === 9) {
            uuidStrArray.push('-');
          }
        }
        var length = payloadSize - 16;
        var userDataBytes = new Uint8Array(length);
        for (var _i3 = 0; _i3 < length; _i3++) {
          userDataBytes[_i3] = data[seiPtr++];
        }
        samples.push({
          payloadType: payloadType,
          pts: pts,
          uuid: uuidStrArray.join(''),
          userData: (0,_demux_id3__WEBPACK_IMPORTED_MODULE_2__.utf8ArrayToStr)(userDataBytes),
          userDataBytes: userDataBytes
        });
      }
    } else if (payloadSize < leftOver) {
      seiPtr += payloadSize;
    } else if (payloadSize > leftOver) {
      break;
    }
  }
}

/**
 * remove Emulation Prevention bytes from a RBSP
 */
function discardEPB(data) {
  var length = data.byteLength;
  var EPBPositions = [];
  var i = 1;

  // Find all `Emulation Prevention Bytes`
  while (i < length - 2) {
    if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {
      EPBPositions.push(i + 2);
      i += 2;
    } else {
      i++;
    }
  }

  // If no Emulation Prevention Bytes were found just return the original
  // array
  if (EPBPositions.length === 0) {
    return data;
  }

  // Create a new array to hold the NAL unit data
  var newLength = length - EPBPositions.length;
  var newData = new Uint8Array(newLength);
  var sourceIndex = 0;
  for (i = 0; i < newLength; sourceIndex++, i++) {
    if (sourceIndex === EPBPositions[0]) {
      // Skip this byte
      sourceIndex++;
      // Remove this position index
      EPBPositions.shift();
    }
    newData[i] = data[sourceIndex];
  }
  return newData;
}
function parseEmsg(data) {
  var version = data[0];
  var schemeIdUri = '';
  var value = '';
  var timeScale = 0;
  var presentationTimeDelta = 0;
  var presentationTime = 0;
  var eventDuration = 0;
  var id = 0;
  var offset = 0;
  if (version === 0) {
    while (bin2str(data.subarray(offset, offset + 1)) !== '\0') {
      schemeIdUri += bin2str(data.subarray(offset, offset + 1));
      offset += 1;
    }
    schemeIdUri += bin2str(data.subarray(offset, offset + 1));
    offset += 1;
    while (bin2str(data.subarray(offset, offset + 1)) !== '\0') {
      value += bin2str(data.subarray(offset, offset + 1));
      offset += 1;
    }
    value += bin2str(data.subarray(offset, offset + 1));
    offset += 1;
    timeScale = readUint32(data, 12);
    presentationTimeDelta = readUint32(data, 16);
    eventDuration = readUint32(data, 20);
    id = readUint32(data, 24);
    offset = 28;
  } else if (version === 1) {
    offset += 4;
    timeScale = readUint32(data, offset);
    offset += 4;
    var leftPresentationTime = readUint32(data, offset);
    offset += 4;
    var rightPresentationTime = readUint32(data, offset);
    offset += 4;
    presentationTime = Math.pow(2, 32) * leftPresentationTime + rightPresentationTime;
    if (!Number.isSafeInteger(presentationTime)) {
      presentationTime = Number.MAX_SAFE_INTEGER;
      // eslint-disable-next-line no-console
      console.warn('Presentation time exceeds safe integer limit and wrapped to max safe integer in parsing emsg box');
    }
    eventDuration = readUint32(data, offset);
    offset += 4;
    id = readUint32(data, offset);
    offset += 4;
    while (bin2str(data.subarray(offset, offset + 1)) !== '\0') {
      schemeIdUri += bin2str(data.subarray(offset, offset + 1));
      offset += 1;
    }
    schemeIdUri += bin2str(data.subarray(offset, offset + 1));
    offset += 1;
    while (bin2str(data.subarray(offset, offset + 1)) !== '\0') {
      value += bin2str(data.subarray(offset, offset + 1));
      offset += 1;
    }
    value += bin2str(data.subarray(offset, offset + 1));
    offset += 1;
  }
  var payload = data.subarray(offset, data.byteLength);
  return {
    schemeIdUri: schemeIdUri,
    value: value,
    timeScale: timeScale,
    presentationTime: presentationTime,
    presentationTimeDelta: presentationTimeDelta,
    eventDuration: eventDuration,
    id: id,
    payload: payload
  };
}
function mp4Box(type) {
  for (var _len = arguments.length, payload = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
    payload[_key - 1] = arguments[_key];
  }
  var len = payload.length;
  var size = 8;
  var i = len;
  while (i--) {
    size += payload[i].byteLength;
  }
  var result = new Uint8Array(size);
  result[0] = size >> 24 & 0xff;
  result[1] = size >> 16 & 0xff;
  result[2] = size >> 8 & 0xff;
  result[3] = size & 0xff;
  result.set(type, 4);
  for (i = 0, size = 8; i < len; i++) {
    result.set(payload[i], size);
    size += payload[i].byteLength;
  }
  return result;
}
function mp4pssh(systemId, keyids, data) {
  if (systemId.byteLength !== 16) {
    throw new RangeError('Invalid system id');
  }
  var version;
  var kids;
  if (keyids) {
    version = 1;
    kids = new Uint8Array(keyids.length * 16);
    for (var ix = 0; ix < keyids.length; ix++) {
      var k = keyids[ix]; // uint8array
      if (k.byteLength !== 16) {
        throw new RangeError('Invalid key');
      }
      kids.set(k, ix * 16);
    }
  } else {
    version = 0;
    kids = new Uint8Array();
  }
  var kidCount;
  if (version > 0) {
    kidCount = new Uint8Array(4);
    if (keyids.length > 0) {
      new DataView(kidCount.buffer).setUint32(0, keyids.length, false);
    }
  } else {
    kidCount = new Uint8Array();
  }
  var dataSize = new Uint8Array(4);
  if (data && data.byteLength > 0) {
    new DataView(dataSize.buffer).setUint32(0, data.byteLength, false);
  }
  return mp4Box([112, 115, 115, 104], new Uint8Array([version, 0x00, 0x00, 0x00 // Flags
  ]), systemId,
  // 16 bytes
  kidCount, kids, dataSize, data || new Uint8Array());
}
function parsePssh(initData) {
  if (!(initData instanceof ArrayBuffer) || initData.byteLength < 32) {
    return null;
  }
  var result = {
    version: 0,
    systemId: '',
    kids: null,
    data: null
  };
  var view = new DataView(initData);
  var boxSize = view.getUint32(0);
  if (initData.byteLength !== boxSize && boxSize > 44) {
    return null;
  }
  var type = view.getUint32(4);
  if (type !== 0x70737368) {
    return null;
  }
  result.version = view.getUint32(8) >>> 24;
  if (result.version > 1) {
    return null;
  }
  result.systemId = _hex__WEBPACK_IMPORTED_MODULE_4__["default"].hexDump(new Uint8Array(initData, 12, 16));
  var dataSizeOrKidCount = view.getUint32(28);
  if (result.version === 0) {
    if (boxSize - 32 < dataSizeOrKidCount) {
      return null;
    }
    result.data = new Uint8Array(initData, 32, dataSizeOrKidCount);
  } else if (result.version === 1) {
    result.kids = [];
    for (var i = 0; i < dataSizeOrKidCount; i++) {
      result.kids.push(new Uint8Array(initData, 32 + i * 16, 16));
    }
  }
  return result;
}

/***/ }),

/***/ "./src/utils/numeric-encoding-utils.ts":
/*!*********************************************!*\
  !*** ./src/utils/numeric-encoding-utils.ts ***!
  \*********************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "base64Decode": () => (/* binding */ base64Decode),
/* harmony export */   "base64DecodeToStr": () => (/* binding */ base64DecodeToStr),
/* harmony export */   "base64Encode": () => (/* binding */ base64Encode),
/* harmony export */   "base64ToBase64Url": () => (/* binding */ base64ToBase64Url),
/* harmony export */   "base64UrlEncode": () => (/* binding */ base64UrlEncode),
/* harmony export */   "strToBase64Encode": () => (/* binding */ strToBase64Encode)
/* harmony export */ });
function base64ToBase64Url(base64encodedStr) {
  return base64encodedStr.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
}
function strToBase64Encode(str) {
  return btoa(str);
}
function base64DecodeToStr(str) {
  return atob(str);
}
function base64Encode(input) {
  return btoa(String.fromCharCode.apply(String, input));
}
function base64UrlEncode(input) {
  return base64ToBase64Url(base64Encode(input));
}
function base64Decode(base64encodedStr) {
  return Uint8Array.from(atob(base64encodedStr), function (c) {
    return c.charCodeAt(0);
  });
}

/***/ }),

/***/ "./src/utils/output-filter.ts":
/*!************************************!*\
  !*** ./src/utils/output-filter.ts ***!
  \************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (/* binding */ OutputFilter)
/* harmony export */ });
var OutputFilter = /*#__PURE__*/function () {
  function OutputFilter(timelineController, trackName) {
    this.timelineController = void 0;
    this.cueRanges = [];
    this.trackName = void 0;
    this.startTime = null;
    this.endTime = null;
    this.screen = null;
    this.timelineController = timelineController;
    this.trackName = trackName;
  }
  var _proto = OutputFilter.prototype;
  _proto.dispatchCue = function dispatchCue() {
    if (this.startTime === null) {
      return;
    }
    this.timelineController.addCues(this.trackName, this.startTime, this.endTime, this.screen, this.cueRanges);
    this.startTime = null;
  };
  _proto.newCue = function newCue(startTime, endTime, screen) {
    if (this.startTime === null || this.startTime > startTime) {
      this.startTime = startTime;
    }
    this.endTime = endTime;
    this.screen = screen;
    this.timelineController.createCaptionsTrack(this.trackName);
  };
  _proto.reset = function reset() {
    this.cueRanges = [];
    this.startTime = null;
  };
  return OutputFilter;
}();


/***/ }),

/***/ "./src/utils/texttrack-utils.ts":
/*!**************************************!*\
  !*** ./src/utils/texttrack-utils.ts ***!
  \**************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "addCueToTrack": () => (/* binding */ addCueToTrack),
/* harmony export */   "clearCurrentCues": () => (/* binding */ clearCurrentCues),
/* harmony export */   "getCuesInRange": () => (/* binding */ getCuesInRange),
/* harmony export */   "removeCuesInRange": () => (/* binding */ removeCuesInRange),
/* harmony export */   "sendAddTrackEvent": () => (/* binding */ sendAddTrackEvent)
/* harmony export */ });
/* harmony import */ var _logger__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./logger */ "./src/utils/logger.ts");

function sendAddTrackEvent(track, videoEl) {
  var event;
  try {
    event = new Event('addtrack');
  } catch (err) {
    // for IE11
    event = document.createEvent('Event');
    event.initEvent('addtrack', false, false);
  }
  event.track = track;
  videoEl.dispatchEvent(event);
}
function addCueToTrack(track, cue) {
  // Sometimes there are cue overlaps on segmented vtts so the same
  // cue can appear more than once in different vtt files.
  // This avoid showing duplicated cues with same timecode and text.
  var mode = track.mode;
  if (mode === 'disabled') {
    track.mode = 'hidden';
  }
  if (track.cues && !track.cues.getCueById(cue.id)) {
    try {
      track.addCue(cue);
      if (!track.cues.getCueById(cue.id)) {
        throw new Error("addCue is failed for: " + cue);
      }
    } catch (err) {
      _logger__WEBPACK_IMPORTED_MODULE_0__.logger.debug("[texttrack-utils]: " + err);
      var textTrackCue = new self.TextTrackCue(cue.startTime, cue.endTime, cue.text);
      textTrackCue.id = cue.id;
      track.addCue(textTrackCue);
    }
  }
  if (mode === 'disabled') {
    track.mode = mode;
  }
}
function clearCurrentCues(track) {
  // When track.mode is disabled, track.cues will be null.
  // To guarantee the removal of cues, we need to temporarily
  // change the mode to hidden
  var mode = track.mode;
  if (mode === 'disabled') {
    track.mode = 'hidden';
  }
  if (track.cues) {
    for (var i = track.cues.length; i--;) {
      track.removeCue(track.cues[i]);
    }
  }
  if (mode === 'disabled') {
    track.mode = mode;
  }
}
function removeCuesInRange(track, start, end, predicate) {
  var mode = track.mode;
  if (mode === 'disabled') {
    track.mode = 'hidden';
  }
  if (track.cues && track.cues.length > 0) {
    var cues = getCuesInRange(track.cues, start, end);
    for (var i = 0; i < cues.length; i++) {
      if (!predicate || predicate(cues[i])) {
        track.removeCue(cues[i]);
      }
    }
  }
  if (mode === 'disabled') {
    track.mode = mode;
  }
}

// Find first cue starting after given time.
// Modified version of binary search O(log(n)).
function getFirstCueIndexAfterTime(cues, time) {
  // If first cue starts after time, start there
  if (time < cues[0].startTime) {
    return 0;
  }
  // If the last cue ends before time there is no overlap
  var len = cues.length - 1;
  if (time > cues[len].endTime) {
    return -1;
  }
  var left = 0;
  var right = len;
  while (left <= right) {
    var mid = Math.floor((right + left) / 2);
    if (time < cues[mid].startTime) {
      right = mid - 1;
    } else if (time > cues[mid].startTime && left < len) {
      left = mid + 1;
    } else {
      // If it's not lower or higher, it must be equal.
      return mid;
    }
  }
  // At this point, left and right have swapped.
  // No direct match was found, left or right element must be the closest. Check which one has the smallest diff.
  return cues[left].startTime - time < time - cues[right].startTime ? left : right;
}
function getCuesInRange(cues, start, end) {
  var cuesFound = [];
  var firstCueInRange = getFirstCueIndexAfterTime(cues, start);
  if (firstCueInRange > -1) {
    for (var i = firstCueInRange, len = cues.length; i < len; i++) {
      var _cue = cues[i];
      if (_cue.startTime >= start && _cue.endTime <= end) {
        cuesFound.push(_cue);
      } else if (_cue.startTime > end) {
        return cuesFound;
      }
    }
  }
  return cuesFound;
}

/***/ }),

/***/ "./src/utils/time-ranges.ts":
/*!**********************************!*\
  !*** ./src/utils/time-ranges.ts ***!
  \**********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/**
 *  TimeRanges to string helper
 */

var TimeRanges = {
  toString: function toString(r) {
    var log = '';
    var len = r.length;
    for (var i = 0; i < len; i++) {
      log += "[" + r.start(i).toFixed(3) + "-" + r.end(i).toFixed(3) + "]";
    }
    return log;
  }
};
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (TimeRanges);

/***/ }),

/***/ "./src/utils/timescale-conversion.ts":
/*!*******************************************!*\
  !*** ./src/utils/timescale-conversion.ts ***!
  \*******************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "toMpegTsClockFromTimescale": () => (/* binding */ toMpegTsClockFromTimescale),
/* harmony export */   "toMsFromMpegTsClock": () => (/* binding */ toMsFromMpegTsClock),
/* harmony export */   "toTimescaleFromBase": () => (/* binding */ toTimescaleFromBase),
/* harmony export */   "toTimescaleFromScale": () => (/* binding */ toTimescaleFromScale)
/* harmony export */ });
var MPEG_TS_CLOCK_FREQ_HZ = 90000;
function toTimescaleFromBase(value, destScale, srcBase, round) {
  if (srcBase === void 0) {
    srcBase = 1;
  }
  if (round === void 0) {
    round = false;
  }
  var result = value * destScale * srcBase; // equivalent to `(value * scale) / (1 / base)`
  return round ? Math.round(result) : result;
}
function toTimescaleFromScale(value, destScale, srcScale, round) {
  if (srcScale === void 0) {
    srcScale = 1;
  }
  if (round === void 0) {
    round = false;
  }
  return toTimescaleFromBase(value, destScale, 1 / srcScale, round);
}
function toMsFromMpegTsClock(value, round) {
  if (round === void 0) {
    round = false;
  }
  return toTimescaleFromBase(value, 1000, 1 / MPEG_TS_CLOCK_FREQ_HZ, round);
}
function toMpegTsClockFromTimescale(value, srcScale) {
  if (srcScale === void 0) {
    srcScale = 1;
  }
  return toTimescaleFromBase(value, MPEG_TS_CLOCK_FREQ_HZ, 1 / srcScale);
}

/***/ }),

/***/ "./src/utils/typed-array.ts":
/*!**********************************!*\
  !*** ./src/utils/typed-array.ts ***!
  \**********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "sliceUint8": () => (/* binding */ sliceUint8)
/* harmony export */ });
function sliceUint8(array, start, end) {
  // @ts-expect-error This polyfills IE11 usage of Uint8Array slice.
  // It always exists in the TypeScript definition so fails, but it fails at runtime on IE11.
  return Uint8Array.prototype.slice ? array.slice(start, end) : new Uint8Array(Array.prototype.slice.call(array, start, end));
}

/***/ }),

/***/ "./src/utils/vttcue.ts":
/*!*****************************!*\
  !*** ./src/utils/vttcue.ts ***!
  \*****************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/**
 * Copyright 2013 vtt.js Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the 'License');
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an 'AS IS' BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = ((function () {
  if (typeof self !== 'undefined' && self.VTTCue) {
    return self.VTTCue;
  }
  var AllowedDirections = ['', 'lr', 'rl'];
  var AllowedAlignments = ['start', 'middle', 'end', 'left', 'right'];
  function isAllowedValue(allowed, value) {
    if (typeof value !== 'string') {
      return false;
    }
    // necessary for assuring the generic conforms to the Array interface
    if (!Array.isArray(allowed)) {
      return false;
    }
    // reset the type so that the next narrowing works well
    var lcValue = value.toLowerCase();
    // use the allow list to narrow the type to a specific subset of strings
    if (~allowed.indexOf(lcValue)) {
      return lcValue;
    }
    return false;
  }
  function findDirectionSetting(value) {
    return isAllowedValue(AllowedDirections, value);
  }
  function findAlignSetting(value) {
    return isAllowedValue(AllowedAlignments, value);
  }
  function extend(obj) {
    for (var _len = arguments.length, rest = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      rest[_key - 1] = arguments[_key];
    }
    var i = 1;
    for (; i < arguments.length; i++) {
      var cobj = arguments[i];
      for (var p in cobj) {
        obj[p] = cobj[p];
      }
    }
    return obj;
  }
  function VTTCue(startTime, endTime, text) {
    var cue = this;
    var baseObj = {
      enumerable: true
    };
    /**
     * Shim implementation specific properties. These properties are not in
     * the spec.
     */

    // Lets us know when the VTTCue's data has changed in such a way that we need
    // to recompute its display state. This lets us compute its display state
    // lazily.
    cue.hasBeenReset = false;

    /**
     * VTTCue and TextTrackCue properties
     * http://dev.w3.org/html5/webvtt/#vttcue-interface
     */

    var _id = '';
    var _pauseOnExit = false;
    var _startTime = startTime;
    var _endTime = endTime;
    var _text = text;
    var _region = null;
    var _vertical = '';
    var _snapToLines = true;
    var _line = 'auto';
    var _lineAlign = 'start';
    var _position = 50;
    var _positionAlign = 'middle';
    var _size = 50;
    var _align = 'middle';
    Object.defineProperty(cue, 'id', extend({}, baseObj, {
      get: function get() {
        return _id;
      },
      set: function set(value) {
        _id = '' + value;
      }
    }));
    Object.defineProperty(cue, 'pauseOnExit', extend({}, baseObj, {
      get: function get() {
        return _pauseOnExit;
      },
      set: function set(value) {
        _pauseOnExit = !!value;
      }
    }));
    Object.defineProperty(cue, 'startTime', extend({}, baseObj, {
      get: function get() {
        return _startTime;
      },
      set: function set(value) {
        if (typeof value !== 'number') {
          throw new TypeError('Start time must be set to a number.');
        }
        _startTime = value;
        this.hasBeenReset = true;
      }
    }));
    Object.defineProperty(cue, 'endTime', extend({}, baseObj, {
      get: function get() {
        return _endTime;
      },
      set: function set(value) {
        if (typeof value !== 'number') {
          throw new TypeError('End time must be set to a number.');
        }
        _endTime = value;
        this.hasBeenReset = true;
      }
    }));
    Object.defineProperty(cue, 'text', extend({}, baseObj, {
      get: function get() {
        return _text;
      },
      set: function set(value) {
        _text = '' + value;
        this.hasBeenReset = true;
      }
    }));

    // todo: implement VTTRegion polyfill?
    Object.defineProperty(cue, 'region', extend({}, baseObj, {
      get: function get() {
        return _region;
      },
      set: function set(value) {
        _region = value;
        this.hasBeenReset = true;
      }
    }));
    Object.defineProperty(cue, 'vertical', extend({}, baseObj, {
      get: function get() {
        return _vertical;
      },
      set: function set(value) {
        var setting = findDirectionSetting(value);
        // Have to check for false because the setting an be an empty string.
        if (setting === false) {
          throw new SyntaxError('An invalid or illegal string was specified.');
        }
        _vertical = setting;
        this.hasBeenReset = true;
      }
    }));
    Object.defineProperty(cue, 'snapToLines', extend({}, baseObj, {
      get: function get() {
        return _snapToLines;
      },
      set: function set(value) {
        _snapToLines = !!value;
        this.hasBeenReset = true;
      }
    }));
    Object.defineProperty(cue, 'line', extend({}, baseObj, {
      get: function get() {
        return _line;
      },
      set: function set(value) {
        if (typeof value !== 'number' && value !== 'auto') {
          throw new SyntaxError('An invalid number or illegal string was specified.');
        }
        _line = value;
        this.hasBeenReset = true;
      }
    }));
    Object.defineProperty(cue, 'lineAlign', extend({}, baseObj, {
      get: function get() {
        return _lineAlign;
      },
      set: function set(value) {
        var setting = findAlignSetting(value);
        if (!setting) {
          throw new SyntaxError('An invalid or illegal string was specified.');
        }
        _lineAlign = setting;
        this.hasBeenReset = true;
      }
    }));
    Object.defineProperty(cue, 'position', extend({}, baseObj, {
      get: function get() {
        return _position;
      },
      set: function set(value) {
        if (value < 0 || value > 100) {
          throw new Error('Position must be between 0 and 100.');
        }
        _position = value;
        this.hasBeenReset = true;
      }
    }));
    Object.defineProperty(cue, 'positionAlign', extend({}, baseObj, {
      get: function get() {
        return _positionAlign;
      },
      set: function set(value) {
        var setting = findAlignSetting(value);
        if (!setting) {
          throw new SyntaxError('An invalid or illegal string was specified.');
        }
        _positionAlign = setting;
        this.hasBeenReset = true;
      }
    }));
    Object.defineProperty(cue, 'size', extend({}, baseObj, {
      get: function get() {
        return _size;
      },
      set: function set(value) {
        if (value < 0 || value > 100) {
          throw new Error('Size must be between 0 and 100.');
        }
        _size = value;
        this.hasBeenReset = true;
      }
    }));
    Object.defineProperty(cue, 'align', extend({}, baseObj, {
      get: function get() {
        return _align;
      },
      set: function set(value) {
        var setting = findAlignSetting(value);
        if (!setting) {
          throw new SyntaxError('An invalid or illegal string was specified.');
        }
        _align = setting;
        this.hasBeenReset = true;
      }
    }));

    /**
     * Other <track> spec defined properties
     */

    // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state
    cue.displayState = undefined;
  }

  /**
   * VTTCue methods
   */

  VTTCue.prototype.getCueAsHTML = function () {
    // Assume WebVTT.convertCueToDOMTree is on the global.
    var WebVTT = self.WebVTT;
    return WebVTT.convertCueToDOMTree(self, this.text);
  };
  // this is a polyfill hack
  return VTTCue;
})());

/***/ }),

/***/ "./src/utils/vttparser.ts":
/*!********************************!*\
  !*** ./src/utils/vttparser.ts ***!
  \********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "VTTParser": () => (/* binding */ VTTParser),
/* harmony export */   "fixLineBreaks": () => (/* binding */ fixLineBreaks),
/* harmony export */   "parseTimeStamp": () => (/* binding */ parseTimeStamp)
/* harmony export */ });
/* harmony import */ var _vttcue__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./vttcue */ "./src/utils/vttcue.ts");
/*
 * Source: https://github.com/mozilla/vtt.js/blob/master/dist/vtt.js
 */


var StringDecoder = /*#__PURE__*/function () {
  function StringDecoder() {}
  var _proto = StringDecoder.prototype;
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  _proto.decode = function decode(data, options) {
    if (!data) {
      return '';
    }
    if (typeof data !== 'string') {
      throw new Error('Error - expected string data.');
    }
    return decodeURIComponent(encodeURIComponent(data));
  };
  return StringDecoder;
}(); // Try to parse input as a time stamp.
function parseTimeStamp(input) {
  function computeSeconds(h, m, s, f) {
    return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + parseFloat(f || 0);
  }
  var m = input.match(/^(?:(\d+):)?(\d{2}):(\d{2})(\.\d+)?/);
  if (!m) {
    return null;
  }
  if (parseFloat(m[2]) > 59) {
    // Timestamp takes the form of [hours]:[minutes].[milliseconds]
    // First position is hours as it's over 59.
    return computeSeconds(m[2], m[3], 0, m[4]);
  }
  // Timestamp takes the form of [hours (optional)]:[minutes]:[seconds].[milliseconds]
  return computeSeconds(m[1], m[2], m[3], m[4]);
}

// A settings object holds key/value pairs and will ignore anything but the first
// assignment to a specific key.
var Settings = /*#__PURE__*/function () {
  function Settings() {
    this.values = Object.create(null);
  }
  var _proto2 = Settings.prototype;
  // Only accept the first assignment to any key.
  _proto2.set = function set(k, v) {
    if (!this.get(k) && v !== '') {
      this.values[k] = v;
    }
  }
  // Return the value for a key, or a default value.
  // If 'defaultKey' is passed then 'dflt' is assumed to be an object with
  // a number of possible default values as properties where 'defaultKey' is
  // the key of the property that will be chosen; otherwise it's assumed to be
  // a single value.
  ;
  _proto2.get = function get(k, dflt, defaultKey) {
    if (defaultKey) {
      return this.has(k) ? this.values[k] : dflt[defaultKey];
    }
    return this.has(k) ? this.values[k] : dflt;
  }
  // Check whether we have a value for a key.
  ;
  _proto2.has = function has(k) {
    return k in this.values;
  }
  // Accept a setting if its one of the given alternatives.
  ;
  _proto2.alt = function alt(k, v, a) {
    for (var n = 0; n < a.length; ++n) {
      if (v === a[n]) {
        this.set(k, v);
        break;
      }
    }
  }
  // Accept a setting if its a valid (signed) integer.
  ;
  _proto2.integer = function integer(k, v) {
    if (/^-?\d+$/.test(v)) {
      // integer
      this.set(k, parseInt(v, 10));
    }
  }
  // Accept a setting if its a valid percentage.
  ;
  _proto2.percent = function percent(k, v) {
    if (/^([\d]{1,3})(\.[\d]*)?%$/.test(v)) {
      var percent = parseFloat(v);
      if (percent >= 0 && percent <= 100) {
        this.set(k, percent);
        return true;
      }
    }
    return false;
  };
  return Settings;
}(); // Helper function to parse input into groups separated by 'groupDelim', and
// interpret each group as a key/value pair separated by 'keyValueDelim'.
function parseOptions(input, callback, keyValueDelim, groupDelim) {
  var groups = groupDelim ? input.split(groupDelim) : [input];
  for (var i in groups) {
    if (typeof groups[i] !== 'string') {
      continue;
    }
    var kv = groups[i].split(keyValueDelim);
    if (kv.length !== 2) {
      continue;
    }
    var _k = kv[0];
    var _v = kv[1];
    callback(_k, _v);
  }
}
var defaults = new _vttcue__WEBPACK_IMPORTED_MODULE_0__["default"](0, 0, '');
// 'middle' was changed to 'center' in the spec: https://github.com/w3c/webvtt/pull/244
//  Safari doesn't yet support this change, but FF and Chrome do.
var center = defaults.align === 'middle' ? 'middle' : 'center';
function parseCue(input, cue, regionList) {
  // Remember the original input if we need to throw an error.
  var oInput = input;
  // 4.1 WebVTT timestamp
  function consumeTimeStamp() {
    var ts = parseTimeStamp(input);
    if (ts === null) {
      throw new Error('Malformed timestamp: ' + oInput);
    }

    // Remove time stamp from input.
    input = input.replace(/^[^\sa-zA-Z-]+/, '');
    return ts;
  }

  // 4.4.2 WebVTT cue settings
  function consumeCueSettings(input, cue) {
    var settings = new Settings();
    parseOptions(input, function (k, v) {
      var vals;
      switch (k) {
        case 'region':
          // Find the last region we parsed with the same region id.
          for (var i = regionList.length - 1; i >= 0; i--) {
            if (regionList[i].id === v) {
              settings.set(k, regionList[i].region);
              break;
            }
          }
          break;
        case 'vertical':
          settings.alt(k, v, ['rl', 'lr']);
          break;
        case 'line':
          vals = v.split(',');
          settings.integer(k, vals[0]);
          if (settings.percent(k, vals[0])) {
            settings.set('snapToLines', false);
          }
          settings.alt(k, vals[0], ['auto']);
          if (vals.length === 2) {
            settings.alt('lineAlign', vals[1], ['start', center, 'end']);
          }
          break;
        case 'position':
          vals = v.split(',');
          settings.percent(k, vals[0]);
          if (vals.length === 2) {
            settings.alt('positionAlign', vals[1], ['start', center, 'end', 'line-left', 'line-right', 'auto']);
          }
          break;
        case 'size':
          settings.percent(k, v);
          break;
        case 'align':
          settings.alt(k, v, ['start', center, 'end', 'left', 'right']);
          break;
      }
    }, /:/, /\s/);

    // Apply default values for any missing fields.
    cue.region = settings.get('region', null);
    cue.vertical = settings.get('vertical', '');
    var line = settings.get('line', 'auto');
    if (line === 'auto' && defaults.line === -1) {
      // set numeric line number for Safari
      line = -1;
    }
    cue.line = line;
    cue.lineAlign = settings.get('lineAlign', 'start');
    cue.snapToLines = settings.get('snapToLines', true);
    cue.size = settings.get('size', 100);
    cue.align = settings.get('align', center);
    var position = settings.get('position', 'auto');
    if (position === 'auto' && defaults.position === 50) {
      // set numeric position for Safari
      position = cue.align === 'start' || cue.align === 'left' ? 0 : cue.align === 'end' || cue.align === 'right' ? 100 : 50;
    }
    cue.position = position;
  }
  function skipWhitespace() {
    input = input.replace(/^\s+/, '');
  }

  // 4.1 WebVTT cue timings.
  skipWhitespace();
  cue.startTime = consumeTimeStamp(); // (1) collect cue start time
  skipWhitespace();
  if (input.slice(0, 3) !== '-->') {
    // (3) next characters must match '-->'
    throw new Error("Malformed time stamp (time stamps must be separated by '-->'): " + oInput);
  }
  input = input.slice(3);
  skipWhitespace();
  cue.endTime = consumeTimeStamp(); // (5) collect cue end time

  // 4.1 WebVTT cue settings list.
  skipWhitespace();
  consumeCueSettings(input, cue);
}
function fixLineBreaks(input) {
  return input.replace(/<br(?: \/)?>/gi, '\n');
}
var VTTParser = /*#__PURE__*/function () {
  function VTTParser() {
    this.state = 'INITIAL';
    this.buffer = '';
    this.decoder = new StringDecoder();
    this.regionList = [];
    this.cue = null;
    this.oncue = void 0;
    this.onparsingerror = void 0;
    this.onflush = void 0;
  }
  var _proto3 = VTTParser.prototype;
  _proto3.parse = function parse(data) {
    var _this = this;

    // If there is no data then we won't decode it, but will just try to parse
    // whatever is in buffer already. This may occur in circumstances, for
    // example when flush() is called.
    if (data) {
      // Try to decode the data that we received.
      _this.buffer += _this.decoder.decode(data, {
        stream: true
      });
    }
    function collectNextLine() {
      var buffer = _this.buffer;
      var pos = 0;
      buffer = fixLineBreaks(buffer);
      while (pos < buffer.length && buffer[pos] !== '\r' && buffer[pos] !== '\n') {
        ++pos;
      }
      var line = buffer.slice(0, pos);
      // Advance the buffer early in case we fail below.
      if (buffer[pos] === '\r') {
        ++pos;
      }
      if (buffer[pos] === '\n') {
        ++pos;
      }
      _this.buffer = buffer.slice(pos);
      return line;
    }

    // 3.2 WebVTT metadata header syntax
    function parseHeader(input) {
      parseOptions(input, function (k, v) {
        // switch (k) {
        // case 'region':
        // 3.3 WebVTT region metadata header syntax
        // console.log('parse region', v);
        // parseRegion(v);
        // break;
        // }
      }, /:/);
    }

    // 5.1 WebVTT file parsing.
    try {
      var line = '';
      if (_this.state === 'INITIAL') {
        // We can't start parsing until we have the first line.
        if (!/\r\n|\n/.test(_this.buffer)) {
          return this;
        }
        line = collectNextLine();
        // strip of UTF-8 BOM if any
        // https://en.wikipedia.org/wiki/Byte_order_mark#UTF-8
        var m = line.match(/^()?WEBVTT([ \t].*)?$/);
        if (!m || !m[0]) {
          throw new Error('Malformed WebVTT signature.');
        }
        _this.state = 'HEADER';
      }
      var alreadyCollectedLine = false;
      while (_this.buffer) {
        // We can't parse a line until we have the full line.
        if (!/\r\n|\n/.test(_this.buffer)) {
          return this;
        }
        if (!alreadyCollectedLine) {
          line = collectNextLine();
        } else {
          alreadyCollectedLine = false;
        }
        switch (_this.state) {
          case 'HEADER':
            // 13-18 - Allow a header (metadata) under the WEBVTT line.
            if (/:/.test(line)) {
              parseHeader(line);
            } else if (!line) {
              // An empty line terminates the header and starts the body (cues).
              _this.state = 'ID';
            }
            continue;
          case 'NOTE':
            // Ignore NOTE blocks.
            if (!line) {
              _this.state = 'ID';
            }
            continue;
          case 'ID':
            // Check for the start of NOTE blocks.
            if (/^NOTE($|[ \t])/.test(line)) {
              _this.state = 'NOTE';
              break;
            }
            // 19-29 - Allow any number of line terminators, then initialize new cue values.
            if (!line) {
              continue;
            }
            _this.cue = new _vttcue__WEBPACK_IMPORTED_MODULE_0__["default"](0, 0, '');
            _this.state = 'CUE';
            // 30-39 - Check if self line contains an optional identifier or timing data.
            if (line.indexOf('-->') === -1) {
              _this.cue.id = line;
              continue;
            }
          // Process line as start of a cue.
          /* falls through */
          case 'CUE':
            // 40 - Collect cue timings and settings.
            if (!_this.cue) {
              _this.state = 'BADCUE';
              continue;
            }
            try {
              parseCue(line, _this.cue, _this.regionList);
            } catch (e) {
              // In case of an error ignore rest of the cue.
              _this.cue = null;
              _this.state = 'BADCUE';
              continue;
            }
            _this.state = 'CUETEXT';
            continue;
          case 'CUETEXT':
            {
              var hasSubstring = line.indexOf('-->') !== -1;
              // 34 - If we have an empty line then report the cue.
              // 35 - If we have the special substring '-->' then report the cue,
              // but do not collect the line as we need to process the current
              // one as a new cue.
              if (!line || hasSubstring && (alreadyCollectedLine = true)) {
                // We are done parsing self cue.
                if (_this.oncue && _this.cue) {
                  _this.oncue(_this.cue);
                }
                _this.cue = null;
                _this.state = 'ID';
                continue;
              }
              if (_this.cue === null) {
                continue;
              }
              if (_this.cue.text) {
                _this.cue.text += '\n';
              }
              _this.cue.text += line;
            }
            continue;
          case 'BADCUE':
            // 54-62 - Collect and discard the remaining cue.
            if (!line) {
              _this.state = 'ID';
            }
        }
      }
    } catch (e) {
      // If we are currently parsing a cue, report what we have.
      if (_this.state === 'CUETEXT' && _this.cue && _this.oncue) {
        _this.oncue(_this.cue);
      }
      _this.cue = null;
      // Enter BADWEBVTT state if header was not parsed correctly otherwise
      // another exception occurred so enter BADCUE state.
      _this.state = _this.state === 'INITIAL' ? 'BADWEBVTT' : 'BADCUE';
    }
    return this;
  };
  _proto3.flush = function flush() {
    var _this = this;
    try {
      // Finish decoding the stream.
      // _this.buffer += _this.decoder.decode();
      // Synthesize the end of the current cue or region.
      if (_this.cue || _this.state === 'HEADER') {
        _this.buffer += '\n\n';
        _this.parse();
      }
      // If we've flushed, parsed, and we're still on the INITIAL state then
      // that means we don't have enough of the stream to parse the first
      // line.
      if (_this.state === 'INITIAL' || _this.state === 'BADWEBVTT') {
        throw new Error('Malformed WebVTT signature.');
      }
    } catch (e) {
      if (_this.onparsingerror) {
        _this.onparsingerror(e);
      }
    }
    if (_this.onflush) {
      _this.onflush();
    }
    return this;
  };
  return VTTParser;
}();

/***/ }),

/***/ "./src/utils/webvtt-parser.ts":
/*!************************************!*\
  !*** ./src/utils/webvtt-parser.ts ***!
  \************************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "generateCueId": () => (/* binding */ generateCueId),
/* harmony export */   "parseWebVTT": () => (/* binding */ parseWebVTT)
/* harmony export */ });
/* harmony import */ var _home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./src/polyfills/number */ "./src/polyfills/number.ts");
/* harmony import */ var _vttparser__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./vttparser */ "./src/utils/vttparser.ts");
/* harmony import */ var _demux_id3__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ../demux/id3 */ "./src/demux/id3.ts");
/* harmony import */ var _timescale_conversion__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(/*! ./timescale-conversion */ "./src/utils/timescale-conversion.ts");
/* harmony import */ var _remux_mp4_remuxer__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(/*! ../remux/mp4-remuxer */ "./src/remux/mp4-remuxer.ts");








var LINEBREAKS = /\r\n|\n\r|\n|\r/g;

// String.prototype.startsWith is not supported in IE11
var startsWith = function startsWith(inputString, searchString, position) {
  if (position === void 0) {
    position = 0;
  }
  return inputString.slice(position, position + searchString.length) === searchString;
};
var cueString2millis = function cueString2millis(timeString) {
  var ts = parseInt(timeString.slice(-3));
  var secs = parseInt(timeString.slice(-6, -4));
  var mins = parseInt(timeString.slice(-9, -7));
  var hours = timeString.length > 9 ? parseInt(timeString.substring(0, timeString.indexOf(':'))) : 0;
  if (!(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(ts) || !(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(secs) || !(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(mins) || !(0,_home_runner_work_hls_js_hls_js_src_polyfills_number__WEBPACK_IMPORTED_MODULE_0__.isFiniteNumber)(hours)) {
    throw Error("Malformed X-TIMESTAMP-MAP: Local:" + timeString);
  }
  ts += 1000 * secs;
  ts += 60 * 1000 * mins;
  ts += 60 * 60 * 1000 * hours;
  return ts;
};

// From https://github.com/darkskyapp/string-hash
var hash = function hash(text) {
  var hash = 5381;
  var i = text.length;
  while (i) {
    hash = hash * 33 ^ text.charCodeAt(--i);
  }
  return (hash >>> 0).toString();
};

// Create a unique hash id for a cue based on start/end times and text.
// This helps timeline-controller to avoid showing repeated captions.
function generateCueId(startTime, endTime, text) {
  return hash(startTime.toString()) + hash(endTime.toString()) + hash(text);
}
var calculateOffset = function calculateOffset(vttCCs, cc, presentationTime) {
  var currCC = vttCCs[cc];
  var prevCC = vttCCs[currCC.prevCC];

  // This is the first discontinuity or cues have been processed since the last discontinuity
  // Offset = current discontinuity time
  if (!prevCC || !prevCC.new && currCC.new) {
    vttCCs.ccOffset = vttCCs.presentationOffset = currCC.start;
    currCC.new = false;
    return;
  }

  // There have been discontinuities since cues were last parsed.
  // Offset = time elapsed
  while ((_prevCC = prevCC) !== null && _prevCC !== void 0 && _prevCC.new) {
    var _prevCC;
    vttCCs.ccOffset += currCC.start - prevCC.start;
    currCC.new = false;
    currCC = prevCC;
    prevCC = vttCCs[currCC.prevCC];
  }
  vttCCs.presentationOffset = presentationTime;
};
function parseWebVTT(vttByteArray, initPTS, timescale, vttCCs, cc, timeOffset, callBack, errorCallBack) {
  var parser = new _vttparser__WEBPACK_IMPORTED_MODULE_1__.VTTParser();
  // Convert byteArray into string, replacing any somewhat exotic linefeeds with "\n", then split on that character.
  // Uint8Array.prototype.reduce is not implemented in IE11
  var vttLines = (0,_demux_id3__WEBPACK_IMPORTED_MODULE_2__.utf8ArrayToStr)(new Uint8Array(vttByteArray)).trim().replace(LINEBREAKS, '\n').split('\n');
  var cues = [];
  var initPTS90Hz = (0,_timescale_conversion__WEBPACK_IMPORTED_MODULE_3__.toMpegTsClockFromTimescale)(initPTS, timescale);
  var cueTime = '00:00.000';
  var timestampMapMPEGTS = 0;
  var timestampMapLOCAL = 0;
  var parsingError;
  var inHeader = true;
  parser.oncue = function (cue) {
    // Adjust cue timing; clamp cues to start no earlier than - and drop cues that don't end after - 0 on timeline.
    var currCC = vttCCs[cc];
    var cueOffset = vttCCs.ccOffset;

    // Calculate subtitle PTS offset
    var webVttMpegTsMapOffset = (timestampMapMPEGTS - initPTS90Hz) / 90000;

    // Update offsets for new discontinuities
    if (currCC !== null && currCC !== void 0 && currCC.new) {
      if (timestampMapLOCAL !== undefined) {
        // When local time is provided, offset = discontinuity start time - local time
        cueOffset = vttCCs.ccOffset = currCC.start;
      } else {
        calculateOffset(vttCCs, cc, webVttMpegTsMapOffset);
      }
    }
    if (webVttMpegTsMapOffset) {
      // If we have MPEGTS, offset = presentation time + discontinuity offset
      cueOffset = webVttMpegTsMapOffset - vttCCs.presentationOffset;
    }
    var duration = cue.endTime - cue.startTime;
    var startTime = (0,_remux_mp4_remuxer__WEBPACK_IMPORTED_MODULE_4__.normalizePts)((cue.startTime + cueOffset - timestampMapLOCAL) * 90000, timeOffset * 90000) / 90000;
    cue.startTime = Math.max(startTime, 0);
    cue.endTime = Math.max(startTime + duration, 0);

    //trim trailing webvtt block whitespaces
    var text = cue.text.trim();

    // Fix encoding of special characters
    cue.text = decodeURIComponent(encodeURIComponent(text));

    // If the cue was not assigned an id from the VTT file (line above the content), create one.
    if (!cue.id) {
      cue.id = generateCueId(cue.startTime, cue.endTime, text);
    }
    if (cue.endTime > 0) {
      cues.push(cue);
    }
  };
  parser.onparsingerror = function (error) {
    parsingError = error;
  };
  parser.onflush = function () {
    if (parsingError) {
      errorCallBack(parsingError);
      return;
    }
    callBack(cues);
  };

  // Go through contents line by line.
  vttLines.forEach(function (line) {
    if (inHeader) {
      // Look for X-TIMESTAMP-MAP in header.
      if (startsWith(line, 'X-TIMESTAMP-MAP=')) {
        // Once found, no more are allowed anyway, so stop searching.
        inHeader = false;
        // Extract LOCAL and MPEGTS.
        line.slice(16).split(',').forEach(function (timestamp) {
          if (startsWith(timestamp, 'LOCAL:')) {
            cueTime = timestamp.slice(6);
          } else if (startsWith(timestamp, 'MPEGTS:')) {
            timestampMapMPEGTS = parseInt(timestamp.slice(7));
          }
        });
        try {
          // Convert cue time to seconds
          timestampMapLOCAL = cueString2millis(cueTime) / 1000;
        } catch (error) {
          parsingError = error;
        }
        // Return without parsing X-TIMESTAMP-MAP line.
        return;
      } else if (line === '') {
        inHeader = false;
      }
    }
    // Parse line by default.
    parser.parse(line + '\n');
  });
  parser.flush();
}

/***/ }),

/***/ "./src/utils/xhr-loader.ts":
/*!*********************************!*\
  !*** ./src/utils/xhr-loader.ts ***!
  \*********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "default": () => (__WEBPACK_DEFAULT_EXPORT__)
/* harmony export */ });
/* harmony import */ var _utils_logger__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ../utils/logger */ "./src/utils/logger.ts");
/* harmony import */ var _loader_load_stats__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ../loader/load-stats */ "./src/loader/load-stats.ts");


var AGE_HEADER_LINE_REGEX = /^age:\s*[\d.]+\s*$/m;
var XhrLoader = /*#__PURE__*/function () {
  function XhrLoader(config /* HlsConfig */) {
    this.xhrSetup = void 0;
    this.requestTimeout = void 0;
    this.retryTimeout = void 0;
    this.retryDelay = void 0;
    this.config = null;
    this.callbacks = null;
    this.context = void 0;
    this.loader = null;
    this.stats = void 0;
    this.xhrSetup = config ? config.xhrSetup : null;
    this.stats = new _loader_load_stats__WEBPACK_IMPORTED_MODULE_1__.LoadStats();
    this.retryDelay = 0;
  }
  var _proto = XhrLoader.prototype;
  _proto.destroy = function destroy() {
    this.callbacks = null;
    this.abortInternal();
    this.loader = null;
    this.config = null;
  };
  _proto.abortInternal = function abortInternal() {
    var loader = this.loader;
    self.clearTimeout(this.requestTimeout);
    self.clearTimeout(this.retryTimeout);
    if (loader) {
      loader.onreadystatechange = null;
      loader.onprogress = null;
      if (loader.readyState !== 4) {
        this.stats.aborted = true;
        loader.abort();
      }
    }
  };
  _proto.abort = function abort() {
    var _this$callbacks;
    this.abortInternal();
    if ((_this$callbacks = this.callbacks) !== null && _this$callbacks !== void 0 && _this$callbacks.onAbort) {
      this.callbacks.onAbort(this.stats, this.context, this.loader);
    }
  };
  _proto.load = function load(context, config, callbacks) {
    if (this.stats.loading.start) {
      throw new Error('Loader can only be used once.');
    }
    this.stats.loading.start = self.performance.now();
    this.context = context;
    this.config = config;
    this.callbacks = callbacks;
    this.retryDelay = config.retryDelay;
    this.loadInternal();
  };
  _proto.loadInternal = function loadInternal() {
    var config = this.config,
      context = this.context;
    if (!config) {
      return;
    }
    var xhr = this.loader = new self.XMLHttpRequest();
    var stats = this.stats;
    stats.loading.first = 0;
    stats.loaded = 0;
    var xhrSetup = this.xhrSetup;
    try {
      if (xhrSetup) {
        try {
          xhrSetup(xhr, context.url);
        } catch (e) {
          // fix xhrSetup: (xhr, url) => {xhr.setRequestHeader("Content-Language", "test");}
          // not working, as xhr.setRequestHeader expects xhr.readyState === OPEN
          xhr.open('GET', context.url, true);
          xhrSetup(xhr, context.url);
        }
      }
      if (!xhr.readyState) {
        xhr.open('GET', context.url, true);
      }
      var headers = this.context.headers;
      if (headers) {
        for (var header in headers) {
          xhr.setRequestHeader(header, headers[header]);
        }
      }
    } catch (e) {
      // IE11 throws an exception on xhr.open if attempting to access an HTTP resource over HTTPS
      this.callbacks.onError({
        code: xhr.status,
        text: e.message
      }, context, xhr);
      return;
    }
    if (context.rangeEnd) {
      xhr.setRequestHeader('Range', 'bytes=' + context.rangeStart + '-' + (context.rangeEnd - 1));
    }
    xhr.onreadystatechange = this.readystatechange.bind(this);
    xhr.onprogress = this.loadprogress.bind(this);
    xhr.responseType = context.responseType;
    // setup timeout before we perform request
    self.clearTimeout(this.requestTimeout);
    this.requestTimeout = self.setTimeout(this.loadtimeout.bind(this), config.timeout);
    xhr.send();
  };
  _proto.readystatechange = function readystatechange() {
    var context = this.context,
      xhr = this.loader,
      stats = this.stats;
    if (!context || !xhr) {
      return;
    }
    var readyState = xhr.readyState;
    var config = this.config;

    // don't proceed if xhr has been aborted
    if (stats.aborted) {
      return;
    }

    // >= HEADERS_RECEIVED
    if (readyState >= 2) {
      // clear xhr timeout and rearm it if readyState less than 4
      self.clearTimeout(this.requestTimeout);
      if (stats.loading.first === 0) {
        stats.loading.first = Math.max(self.performance.now(), stats.loading.start);
      }
      if (readyState === 4) {
        xhr.onreadystatechange = null;
        xhr.onprogress = null;
        var status = xhr.status;
        // http status between 200 to 299 are all successful
        var isArrayBuffer = xhr.responseType === 'arraybuffer';
        if (status >= 200 && status < 300 && (isArrayBuffer && xhr.response || xhr.responseText !== null)) {
          stats.loading.end = Math.max(self.performance.now(), stats.loading.first);
          var data;
          var len;
          if (isArrayBuffer) {
            data = xhr.response;
            len = data.byteLength;
          } else {
            data = xhr.responseText;
            len = data.length;
          }
          stats.loaded = stats.total = len;
          if (!this.callbacks) {
            return;
          }
          var onProgress = this.callbacks.onProgress;
          if (onProgress) {
            onProgress(stats, context, data, xhr);
          }
          if (!this.callbacks) {
            return;
          }
          var response = {
            url: xhr.responseURL,
            data: data
          };
          this.callbacks.onSuccess(response, stats, context, xhr);
        } else {
          // if max nb of retries reached or if http status between 400 and 499 (such error cannot be recovered, retrying is useless), return error
          if (stats.retry >= config.maxRetry || status >= 400 && status < 499) {
            _utils_logger__WEBPACK_IMPORTED_MODULE_0__.logger.error(status + " while loading " + context.url);
            this.callbacks.onError({
              code: status,
              text: xhr.statusText
            }, context, xhr);
          } else {
            // retry
            _utils_logger__WEBPACK_IMPORTED_MODULE_0__.logger.warn(status + " while loading " + context.url + ", retrying in " + this.retryDelay + "...");
            // abort and reset internal state
            this.abortInternal();
            this.loader = null;
            // schedule retry
            self.clearTimeout(this.retryTimeout);
            this.retryTimeout = self.setTimeout(this.loadInternal.bind(this), this.retryDelay);
            // set exponential backoff
            this.retryDelay = Math.min(2 * this.retryDelay, config.maxRetryDelay);
            stats.retry++;
          }
        }
      } else {
        // readyState >= 2 AND readyState !==4 (readyState = HEADERS_RECEIVED || LOADING) rearm timeout as xhr not finished yet
        self.clearTimeout(this.requestTimeout);
        this.requestTimeout = self.setTimeout(this.loadtimeout.bind(this), config.timeout);
      }
    }
  };
  _proto.loadtimeout = function loadtimeout() {
    _utils_logger__WEBPACK_IMPORTED_MODULE_0__.logger.warn("timeout while loading " + this.context.url);
    var callbacks = this.callbacks;
    if (callbacks) {
      this.abortInternal();
      callbacks.onTimeout(this.stats, this.context, this.loader);
    }
  };
  _proto.loadprogress = function loadprogress(event) {
    var stats = this.stats;
    stats.loaded = event.loaded;
    if (event.lengthComputable) {
      stats.total = event.total;
    }
  };
  _proto.getCacheAge = function getCacheAge() {
    var result = null;
    if (this.loader && AGE_HEADER_LINE_REGEX.test(this.loader.getAllResponseHeaders())) {
      var ageHeader = this.loader.getResponseHeader('age');
      result = ageHeader ? parseFloat(ageHeader) : null;
    }
    return result;
  };
  return XhrLoader;
}();
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = (XhrLoader);

/***/ }),

/***/ "./node_modules/eventemitter3/index.js":
/*!*********************************************!*\
  !*** ./node_modules/eventemitter3/index.js ***!
  \*********************************************/
/***/ ((module) => {

"use strict";


var has = Object.prototype.hasOwnProperty
  , prefix = '~';

/**
 * Constructor to create a storage for our `EE` objects.
 * An `Events` instance is a plain object whose properties are event names.
 *
 * @constructor
 * @private
 */
function Events() {}

//
// We try to not inherit from `Object.prototype`. In some engines creating an
// instance in this way is faster than calling `Object.create(null)` directly.
// If `Object.create(null)` is not supported we prefix the event names with a
// character to make sure that the built-in object properties are not
// overridden or used as an attack vector.
//
if (Object.create) {
  Events.prototype = Object.create(null);

  //
  // This hack is needed because the `__proto__` property is still inherited in
  // some old browsers like Android 4, iPhone 5.1, Opera 11 and Safari 5.
  //
  if (!new Events().__proto__) prefix = false;
}

/**
 * Representation of a single event listener.
 *
 * @param {Function} fn The listener function.
 * @param {*} context The context to invoke the listener with.
 * @param {Boolean} [once=false] Specify if the listener is a one-time listener.
 * @constructor
 * @private
 */
function EE(fn, context, once) {
  this.fn = fn;
  this.context = context;
  this.once = once || false;
}

/**
 * Add a listener for a given event.
 *
 * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
 * @param {(String|Symbol)} event The event name.
 * @param {Function} fn The listener function.
 * @param {*} context The context to invoke the listener with.
 * @param {Boolean} once Specify if the listener is a one-time listener.
 * @returns {EventEmitter}
 * @private
 */
function addListener(emitter, event, fn, context, once) {
  if (typeof fn !== 'function') {
    throw new TypeError('The listener must be a function');
  }

  var listener = new EE(fn, context || emitter, once)
    , evt = prefix ? prefix + event : event;

  if (!emitter._events[evt]) emitter._events[evt] = listener, emitter._eventsCount++;
  else if (!emitter._events[evt].fn) emitter._events[evt].push(listener);
  else emitter._events[evt] = [emitter._events[evt], listener];

  return emitter;
}

/**
 * Clear event by name.
 *
 * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
 * @param {(String|Symbol)} evt The Event name.
 * @private
 */
function clearEvent(emitter, evt) {
  if (--emitter._eventsCount === 0) emitter._events = new Events();
  else delete emitter._events[evt];
}

/**
 * Minimal `EventEmitter` interface that is molded against the Node.js
 * `EventEmitter` interface.
 *
 * @constructor
 * @public
 */
function EventEmitter() {
  this._events = new Events();
  this._eventsCount = 0;
}

/**
 * Return an array listing the events for which the emitter has registered
 * listeners.
 *
 * @returns {Array}
 * @public
 */
EventEmitter.prototype.eventNames = function eventNames() {
  var names = []
    , events
    , name;

  if (this._eventsCount === 0) return names;

  for (name in (events = this._events)) {
    if (has.call(events, name)) names.push(prefix ? name.slice(1) : name);
  }

  if (Object.getOwnPropertySymbols) {
    return names.concat(Object.getOwnPropertySymbols(events));
  }

  return names;
};

/**
 * Return the listeners registered for a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @returns {Array} The registered listeners.
 * @public
 */
EventEmitter.prototype.listeners = function listeners(event) {
  var evt = prefix ? prefix + event : event
    , handlers = this._events[evt];

  if (!handlers) return [];
  if (handlers.fn) return [handlers.fn];

  for (var i = 0, l = handlers.length, ee = new Array(l); i < l; i++) {
    ee[i] = handlers[i].fn;
  }

  return ee;
};

/**
 * Return the number of listeners listening to a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @returns {Number} The number of listeners.
 * @public
 */
EventEmitter.prototype.listenerCount = function listenerCount(event) {
  var evt = prefix ? prefix + event : event
    , listeners = this._events[evt];

  if (!listeners) return 0;
  if (listeners.fn) return 1;
  return listeners.length;
};

/**
 * Calls each of the listeners registered for a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @returns {Boolean} `true` if the event had listeners, else `false`.
 * @public
 */
EventEmitter.prototype.emit = function emit(event, a1, a2, a3, a4, a5) {
  var evt = prefix ? prefix + event : event;

  if (!this._events[evt]) return false;

  var listeners = this._events[evt]
    , len = arguments.length
    , args
    , i;

  if (listeners.fn) {
    if (listeners.once) this.removeListener(event, listeners.fn, undefined, true);

    switch (len) {
      case 1: return listeners.fn.call(listeners.context), true;
      case 2: return listeners.fn.call(listeners.context, a1), true;
      case 3: return listeners.fn.call(listeners.context, a1, a2), true;
      case 4: return listeners.fn.call(listeners.context, a1, a2, a3), true;
      case 5: return listeners.fn.call(listeners.context, a1, a2, a3, a4), true;
      case 6: return listeners.fn.call(listeners.context, a1, a2, a3, a4, a5), true;
    }

    for (i = 1, args = new Array(len -1); i < len; i++) {
      args[i - 1] = arguments[i];
    }

    listeners.fn.apply(listeners.context, args);
  } else {
    var length = listeners.length
      , j;

    for (i = 0; i < length; i++) {
      if (listeners[i].once) this.removeListener(event, listeners[i].fn, undefined, true);

      switch (len) {
        case 1: listeners[i].fn.call(listeners[i].context); break;
        case 2: listeners[i].fn.call(listeners[i].context, a1); break;
        case 3: listeners[i].fn.call(listeners[i].context, a1, a2); break;
        case 4: listeners[i].fn.call(listeners[i].context, a1, a2, a3); break;
        default:
          if (!args) for (j = 1, args = new Array(len -1); j < len; j++) {
            args[j - 1] = arguments[j];
          }

          listeners[i].fn.apply(listeners[i].context, args);
      }
    }
  }

  return true;
};

/**
 * Add a listener for a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @param {Function} fn The listener function.
 * @param {*} [context=this] The context to invoke the listener with.
 * @returns {EventEmitter} `this`.
 * @public
 */
EventEmitter.prototype.on = function on(event, fn, context) {
  return addListener(this, event, fn, context, false);
};

/**
 * Add a one-time listener for a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @param {Function} fn The listener function.
 * @param {*} [context=this] The context to invoke the listener with.
 * @returns {EventEmitter} `this`.
 * @public
 */
EventEmitter.prototype.once = function once(event, fn, context) {
  return addListener(this, event, fn, context, true);
};

/**
 * Remove the listeners of a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @param {Function} fn Only remove the listeners that match this function.
 * @param {*} context Only remove the listeners that have this context.
 * @param {Boolean} once Only remove one-time listeners.
 * @returns {EventEmitter} `this`.
 * @public
 */
EventEmitter.prototype.removeListener = function removeListener(event, fn, context, once) {
  var evt = prefix ? prefix + event : event;

  if (!this._events[evt]) return this;
  if (!fn) {
    clearEvent(this, evt);
    return this;
  }

  var listeners = this._events[evt];

  if (listeners.fn) {
    if (
      listeners.fn === fn &&
      (!once || listeners.once) &&
      (!context || listeners.context === context)
    ) {
      clearEvent(this, evt);
    }
  } else {
    for (var i = 0, events = [], length = listeners.length; i < length; i++) {
      if (
        listeners[i].fn !== fn ||
        (once && !listeners[i].once) ||
        (context && listeners[i].context !== context)
      ) {
        events.push(listeners[i]);
      }
    }

    //
    // Reset the array, or remove it completely if we have no more listeners.
    //
    if (events.length) this._events[evt] = events.length === 1 ? events[0] : events;
    else clearEvent(this, evt);
  }

  return this;
};

/**
 * Remove all listeners, or those of the specified event.
 *
 * @param {(String|Symbol)} [event] The event name.
 * @returns {EventEmitter} `this`.
 * @public
 */
EventEmitter.prototype.removeAllListeners = function removeAllListeners(event) {
  var evt;

  if (event) {
    evt = prefix ? prefix + event : event;
    if (this._events[evt]) clearEvent(this, evt);
  } else {
    this._events = new Events();
    this._eventsCount = 0;
  }

  return this;
};

//
// Alias methods names because people roll like that.
//
EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
EventEmitter.prototype.addListener = EventEmitter.prototype.on;

//
// Expose the prefix.
//
EventEmitter.prefixed = prefix;

//
// Allow `EventEmitter` to be imported as module namespace.
//
EventEmitter.EventEmitter = EventEmitter;

//
// Expose the module.
//
if (true) {
  module.exports = EventEmitter;
}


/***/ }),

/***/ "./node_modules/url-toolkit/src/url-toolkit.js":
/*!*****************************************************!*\
  !*** ./node_modules/url-toolkit/src/url-toolkit.js ***!
  \*****************************************************/
/***/ (function(module) {

// see https://tools.ietf.org/html/rfc1808

(function (root) {
  var URL_REGEX =
    /^(?=((?:[a-zA-Z0-9+\-.]+:)?))\1(?=((?:\/\/[^\/?#]*)?))\2(?=((?:(?:[^?#\/]*\/)*[^;?#\/]*)?))\3((?:;[^?#]*)?)(\?[^#]*)?(#[^]*)?$/;
  var FIRST_SEGMENT_REGEX = /^(?=([^\/?#]*))\1([^]*)$/;
  var SLASH_DOT_REGEX = /(?:\/|^)\.(?=\/)/g;
  var SLASH_DOT_DOT_REGEX = /(?:\/|^)\.\.\/(?!\.\.\/)[^\/]*(?=\/)/g;

  var URLToolkit = {
    // If opts.alwaysNormalize is true then the path will always be normalized even when it starts with / or //
    // E.g
    // With opts.alwaysNormalize = false (default, spec compliant)
    // http://a.com/b/cd + /e/f/../g => http://a.com/e/f/../g
    // With opts.alwaysNormalize = true (not spec compliant)
    // http://a.com/b/cd + /e/f/../g => http://a.com/e/g
    buildAbsoluteURL: function (baseURL, relativeURL, opts) {
      opts = opts || {};
      // remove any remaining space and CRLF
      baseURL = baseURL.trim();
      relativeURL = relativeURL.trim();
      if (!relativeURL) {
        // 2a) If the embedded URL is entirely empty, it inherits the
        // entire base URL (i.e., is set equal to the base URL)
        // and we are done.
        if (!opts.alwaysNormalize) {
          return baseURL;
        }
        var basePartsForNormalise = URLToolkit.parseURL(baseURL);
        if (!basePartsForNormalise) {
          throw new Error('Error trying to parse base URL.');
        }
        basePartsForNormalise.path = URLToolkit.normalizePath(
          basePartsForNormalise.path
        );
        return URLToolkit.buildURLFromParts(basePartsForNormalise);
      }
      var relativeParts = URLToolkit.parseURL(relativeURL);
      if (!relativeParts) {
        throw new Error('Error trying to parse relative URL.');
      }
      if (relativeParts.scheme) {
        // 2b) If the embedded URL starts with a scheme name, it is
        // interpreted as an absolute URL and we are done.
        if (!opts.alwaysNormalize) {
          return relativeURL;
        }
        relativeParts.path = URLToolkit.normalizePath(relativeParts.path);
        return URLToolkit.buildURLFromParts(relativeParts);
      }
      var baseParts = URLToolkit.parseURL(baseURL);
      if (!baseParts) {
        throw new Error('Error trying to parse base URL.');
      }
      if (!baseParts.netLoc && baseParts.path && baseParts.path[0] !== '/') {
        // If netLoc missing and path doesn't start with '/', assume everthing before the first '/' is the netLoc
        // This causes 'example.com/a' to be handled as '//example.com/a' instead of '/example.com/a'
        var pathParts = FIRST_SEGMENT_REGEX.exec(baseParts.path);
        baseParts.netLoc = pathParts[1];
        baseParts.path = pathParts[2];
      }
      if (baseParts.netLoc && !baseParts.path) {
        baseParts.path = '/';
      }
      var builtParts = {
        // 2c) Otherwise, the embedded URL inherits the scheme of
        // the base URL.
        scheme: baseParts.scheme,
        netLoc: relativeParts.netLoc,
        path: null,
        params: relativeParts.params,
        query: relativeParts.query,
        fragment: relativeParts.fragment,
      };
      if (!relativeParts.netLoc) {
        // 3) If the embedded URL's <net_loc> is non-empty, we skip to
        // Step 7.  Otherwise, the embedded URL inherits the <net_loc>
        // (if any) of the base URL.
        builtParts.netLoc = baseParts.netLoc;
        // 4) If the embedded URL path is preceded by a slash "/", the
        // path is not relative and we skip to Step 7.
        if (relativeParts.path[0] !== '/') {
          if (!relativeParts.path) {
            // 5) If the embedded URL path is empty (and not preceded by a
            // slash), then the embedded URL inherits the base URL path
            builtParts.path = baseParts.path;
            // 5a) if the embedded URL's <params> is non-empty, we skip to
            // step 7; otherwise, it inherits the <params> of the base
            // URL (if any) and
            if (!relativeParts.params) {
              builtParts.params = baseParts.params;
              // 5b) if the embedded URL's <query> is non-empty, we skip to
              // step 7; otherwise, it inherits the <query> of the base
              // URL (if any) and we skip to step 7.
              if (!relativeParts.query) {
                builtParts.query = baseParts.query;
              }
            }
          } else {
            // 6) The last segment of the base URL's path (anything
            // following the rightmost slash "/", or the entire path if no
            // slash is present) is removed and the embedded URL's path is
            // appended in its place.
            var baseURLPath = baseParts.path;
            var newPath =
              baseURLPath.substring(0, baseURLPath.lastIndexOf('/') + 1) +
              relativeParts.path;
            builtParts.path = URLToolkit.normalizePath(newPath);
          }
        }
      }
      if (builtParts.path === null) {
        builtParts.path = opts.alwaysNormalize
          ? URLToolkit.normalizePath(relativeParts.path)
          : relativeParts.path;
      }
      return URLToolkit.buildURLFromParts(builtParts);
    },
    parseURL: function (url) {
      var parts = URL_REGEX.exec(url);
      if (!parts) {
        return null;
      }
      return {
        scheme: parts[1] || '',
        netLoc: parts[2] || '',
        path: parts[3] || '',
        params: parts[4] || '',
        query: parts[5] || '',
        fragment: parts[6] || '',
      };
    },
    normalizePath: function (path) {
      // The following operations are
      // then applied, in order, to the new path:
      // 6a) All occurrences of "./", where "." is a complete path
      // segment, are removed.
      // 6b) If the path ends with "." as a complete path segment,
      // that "." is removed.
      path = path.split('').reverse().join('').replace(SLASH_DOT_REGEX, '');
      // 6c) All occurrences of "<segment>/../", where <segment> is a
      // complete path segment not equal to "..", are removed.
      // Removal of these path segments is performed iteratively,
      // removing the leftmost matching pattern on each iteration,
      // until no matching pattern remains.
      // 6d) If the path ends with "<segment>/..", where <segment> is a
      // complete path segment not equal to "..", that
      // "<segment>/.." is removed.
      while (
        path.length !== (path = path.replace(SLASH_DOT_DOT_REGEX, '')).length
      ) {}
      return path.split('').reverse().join('');
    },
    buildURLFromParts: function (parts) {
      return (
        parts.scheme +
        parts.netLoc +
        parts.path +
        parts.params +
        parts.query +
        parts.fragment
      );
    },
  };

  if (true)
    module.exports = URLToolkit;
  else {}
})(this);


/***/ })

/******/ 	});
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/******/ 		if (cachedModule !== undefined) {
/******/ 			return cachedModule.exports;
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/******/ 			exports: {}
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/******/ 		return module.exports;
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/******/ 		__webpack_require__.n = (module) => {
/******/ 			var getter = module && module.__esModule ?
/******/ 				() => (module['default']) :
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/******/ 					Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
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/******/ 	/* webpack/runtime/hasOwnProperty shorthand */
/******/ 	(() => {
/******/ 		__webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))
/******/ 	})();
/******/ 	
/******/ 	/* webpack/runtime/make namespace object */
/******/ 	(() => {
/******/ 		// define __esModule on exports
/******/ 		__webpack_require__.r = (exports) => {
/******/ 			if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
/******/ 				Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
/******/ 			}
/******/ 			Object.defineProperty(exports, '__esModule', { value: true });
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/******/ 	// module factories are used so entry inlining is disabled
/******/ 	// startup
/******/ 	// Load entry module and return exports
/******/ 	var __webpack_exports__ = __webpack_require__("./src/hls.ts");
/******/ 	__webpack_exports__ = __webpack_exports__["default"];
/******/ 	
/******/ 	return __webpack_exports__;
/******/ })()
;
});
//# sourceMappingURL=hls.js.map