#!/bin/bash -eux

install_aom() {(
        git clone --depth 1 https://aomedia.googlesource.com/aom
        mkdir -p aom/build
        cd aom/build
        if [ "$(lsb_release -rs)" = 18.04 ]; then
                CC=gcc-10 CXX=g++-10 cmake -DBUILD_SHARED_LIBS=1 ..
        else
                cmake -DBUILD_SHARED_LIBS=1 ..
        fi
        cmake --build . --parallel
        sudo cmake --install .
)}

install_libvpx() {
        (
        git clone --depth 1 https://github.com/webmproject/libvpx.git
        cd libvpx
        ./configure --enable-pic --disable-examples --disable-install-bins --disable-install-srcs --enable-vp9-highbitdepth
        make -j "$(nproc)"
        sudo make install
        )
}

FFMPEG_GIT_DEPTH=5000 # greater depth is useful for 3-way merges
install_svt() {
        ( git clone --depth 1 https://github.com/OpenVisualCloud/SVT-HEVC && cd SVT-HEVC/Build/linux && ./build.sh release && cd Release && sudo cmake --install . || exit 1 )
        ( git clone --depth 1 https://gitlab.com/AOMediaCodec/SVT-AV1.git && cd SVT-AV1 && cd Build && cmake .. -G"Unix Makefiles" -DCMAKE_BUILD_TYPE=Release && cmake --build . --parallel && sudo cmake --install . || exit 1 )
        ( git clone --depth 1 https://github.com/OpenVisualCloud/SVT-VP9.git && cd SVT-VP9/Build && cmake .. -DCMAKE_BUILD_TYPE=Release && cmake --build . --parallel && sudo cmake --install . || exit 1 )
        # if patch apply fails, try increasing $FFMPEG_GIT_DEPTH
        git am -3 SVT-HEVC/ffmpeg_plugin/master-*.patch
        git am -3 SVT-VP9/ffmpeg_plugin/master-*.patch
}

# The NVENC API implies respective driver version (see libavcodec/nvenc.c) - 455.28 (Linux) / 456.71 (Windows) for v11.0
install_nv_codec_headers() {
        git clone --depth 1 -b sdk/11.0 https://git.videolan.org/git/ffmpeg/nv-codec-headers.git
        ( cd nv-codec-headers && make && sudo make install || exit 1 )
}

install_onevpl() {(
        git clone --depth 1 https://github.com/oneapi-src/oneVPL
        mkdir oneVPL/build
        cd oneVPL/build
        cmake ..
        cmake --build . --config Release --parallel
        sudo cmake --build . --config Release --target install
)}

rm -rf /var/tmp/ffmpeg
git clone --depth $FFMPEG_GIT_DEPTH https://git.ffmpeg.org/ffmpeg.git /var/tmp/ffmpeg
cd /var/tmp/ffmpeg
# apply Intel patches
git clone https://github.com/intel/cartwheel-ffmpeg.git
git checkout "$(GIT_DIR=cartwheel-ffmpeg/.git git submodule status ffmpeg | sed 's/-\([[:xdigit:]]*\).*/\1/')"
git am -3 cartwheel-ffmpeg/patches/*
if [ "$(lsb_release -rs)" = 18.04 ]; then
        git am -3 "$GITHUB_WORKSPACE/.github/scripts/Linux/ffmpeg-patches/0001-removed-bits-incompatible-with-old-vaapi.patch-noauto"
fi
install_aom
( git clone --depth 1 http://git.videolan.org/git/x264.git && cd x264 && ./configure --disable-static --enable-shared && make -j "$(nproc)" && sudo make install || exit 1 )
install_libvpx
install_nv_codec_headers
install_onevpl
install_svt
# apply patches
find "$GITHUB_WORKSPACE/.github/scripts/Linux/ffmpeg-patches" -name '*.patch' -print0 | sort -z | xargs -0 -n 1 git am -3
./configure --disable-static --enable-shared --enable-gpl --enable-libx264 --enable-libx265 --enable-libopus --enable-nonfree --enable-nvenc --enable-libaom --enable-libvpx --enable-libspeex --enable-libmp3lame \
        --enable-libdav1d \
        --enable-libde265 \
        --enable-librav1e \
        --enable-libsvtav1 \
        --enable-libsvthevc \
        --enable-libsvtvp9 \
        --enable-libvpl \
        --disable-sdl2 \

make -j "$(nproc)"
sudo make install
sudo ldconfig