#!/bin/bash

#ubuntu: 14.04+
#

#install required things from apt
installLibs() {
    echo "Installing prerequisites"
    sudo apt-get update
    sudo apt-get -y --force-yes install autoconf automake build-essential libass-dev libfreetype6-dev libgpac-dev \
        libsdl1.2-dev libtheora-dev libtool libva-dev libvdpau-dev libvorbis-dev libxcb1-dev libxcb-shm0-dev \
        libxcb-xfixes0-dev pkg-config texi2html zlib1g-dev
}

#Compile nasm
compileNasm() {
    echo "Compiling nasm"
    cd ~/ffmpeg_sources
    wget http://www.nasm.us/pub/nasm/releasebuilds/2.14rc0/nasm-2.14rc0.tar.gz
    tar xzvf nasm-2.14rc0.tar.gz
    cd nasm-2.14rc0
    ./configure --prefix="$HOME/ffmpeg_build" --bindir="$HOME/bin"
    make -j$(nproc)
    make -j$(nproc) install
    make -j$(nproc) distclean
}

#Compile libx264
compileLibX264() {
    echo "Compiling libx264"
    cd ~/ffmpeg_sources
    wget http://download.videolan.org/pub/x264/snapshots/last_x264.tar.bz2
    tar xjvf last_x264.tar.bz2
    cd x264-snapshot*
    PATH="$HOME/bin:$PATH" ./configure --prefix="$HOME/ffmpeg_build" --bindir="$HOME/bin" --enable-static
    PATH="$HOME/bin:$PATH" make -j$(nproc)
    make -j$(nproc) install
    make -j$(nproc) distclean
}

#Compile libfdk-acc
compileLibfdkcc() {
    echo "Compiling libfdk-cc"
    sudo apt-get install unzip
    cd ~/ffmpeg_sources
    wget -O fdk-aac.zip https://github.com/mstorsjo/fdk-aac/zipball/master
    unzip fdk-aac.zip
    cd mstorsjo-fdk-aac*
    autoreconf -fiv
    ./configure --prefix="$HOME/ffmpeg_build" --disable-shared
    make -j$(nproc)
    make -j$(nproc) install
    make -j$(nproc) distclean
}

#Compile libmp3lame
compileLibMP3Lame() {
    echo "Compiling libmp3lame"
    sudo apt-get install nasm
    cd ~/ffmpeg_sources
    wget http://downloads.sourceforge.net/project/lame/lame/3.99/lame-3.99.5.tar.gz
    tar xzvf lame-3.99.5.tar.gz
    cd lame-3.99.5
    ./configure --prefix="$HOME/ffmpeg_build" --enable-nasm --disable-shared
    make -j$(nproc)
    make -j$(nproc) install
    make -j$(nproc) distclean
}

#Compile libopus
compileLibOpus() {
    echo "Compiling libopus"
    cd ~/ffmpeg_sources
    wget http://downloads.xiph.org/releases/opus/opus-1.2.1.tar.gz
    tar xzvf opus-1.2.1.tar.gz
    cd opus-1.2.1
    ./configure --prefix="$HOME/ffmpeg_build" --disable-shared
    make -j$(nproc)
    make -j$(nproc) install
    make -j$(nproc) distclean
}

#Compile libvpx
compileLibPvx() {
    echo "Compiling libvpx"
    cd ~/ffmpeg_sources
    git clone https://chromium.googlesource.com/webm/libvpx
    cd libvpx
    PATH="$HOME/bin:$PATH" ./configure --prefix="$HOME/ffmpeg_build" --disable-examples --enable-runtime-cpu-detect --enable-vp9 --enable-vp8 \
        --enable-postproc --enable-vp9-postproc --enable-multi-res-encoding --enable-webm-io --enable-better-hw-compatibility --enable-vp9-highbitdepth --enable-onthefly-bitpacking --enable-realtime-only \
        --cpu=native --as=nasm
    PATH="$HOME/bin:$PATH" make -j$(nproc)
    make -j$(nproc) install
    make -j$(nproc) clean
}

#Compile ffmpeg
compileFfmpeg() {
    echo "Compiling ffmpeg"
    cd ~/ffmpeg_sources
    git clone https://github.com/FFmpeg/FFmpeg -b master
    cd FFmpeg
    PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
        --prefix="$HOME/ffmpeg_build" \
        --extra-cflags="-I$HOME/ffmpeg_build/include" \
        --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
        --bindir="$HOME/bin" \
        --enable-cuvid \
        --enable-libnpp \
        --enable-gpl \
        --enable-libass \
        --enable-libfdk-aac \
        --enable-vaapi \
        --enable-libfreetype \
        --enable-libmp3lame \
        --enable-libopus \
        --enable-libtheora \
        --enable-libvorbis \
        --enable-libvpx \
        --enable-libx264 \
        --enable-libx265 \
        --enable-nonfree \
        --enable-lv2 \
        --samples=fate-suite/

    PATH="$HOME/bin:$PATH" make -j$(nproc)
    make -j$(nproc) install
    make -j$(nproc) distclean
    hash -r
}

#The process
cd ~
mkdir ffmpeg_sources
installLibs
compileNasm
compileLibX264
compileLibfdkcc
compileLibMP3Lame
compileLibOpus
compileLibPvx
compileFfmpeg
echo "Complete!"