Add option to statically compile ffmpeg from source

1 files changed, 233 insertions, 0 deletions

diff --git a/extra/build_ffmpeg.sh b/extra/build_ffmpeg.sh
new file mode 100755
index 0000000..06c3344
--- /dev/null
+++ b/extra/build_ffmpeg.sh
@@ -0,0 +1,233 @@
+#!/bin/sh
+
+# Builds ffmpeg, or one of the libraries that ffmpeg depends on, from source as a
+# static library with lto. Only the components that gpu-screen-recorder uses are enabled.
+# This is run by meson when the "ffmpeg_static" option is enabled.
+
+set -eu
+
+if [ $# -ne 5 ]; then
+    echo "usage: $0 <library> <source-dir> <build-dir> <install-prefix> <c-compiler>" >&2
+    exit 1
+fi
+
+library=$1
+source_dir=$2
+build_dir=$3
+prefix=$4
+compiler=$5
+log_file=$build_dir/build.log
+stamp_file=$prefix/$library.stamp
+jobs=$(nproc 2>/dev/null || echo 4)
+
+export CC=$compiler
+export PKG_CONFIG_PATH=$prefix/lib/pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}
+
+require_program() {
+    if ! command -v "$1" >/dev/null 2>&1; then
+        echo "error: $1 is required to build $library from source" >&2
+        exit 1
+    fi
+}
+
+require_program pkg-config
+require_program make
+
+case $library in
+    nv-codec-headers)
+        set -- PREFIX="$prefix"
+        build() {
+            make -C "$source_dir" "$@" install
+        }
+        ;;
+    x264)
+        require_program nasm
+        set -- --prefix="$prefix" \
+            --enable-static \
+            --enable-pic \
+            --enable-lto \
+            --disable-cli \
+            --disable-opencl
+        build() {
+            "$source_dir/configure" "$@"
+            make -j"$jobs"
+            make install
+        }
+        ;;
+    opus)
+        set -- --prefix="$prefix" \
+            --disable-shared \
+            --enable-static \
+            --with-pic \
+            --disable-doc \
+            --disable-extra-programs \
+            CFLAGS="-O3 -flto -fPIC" \
+            LDFLAGS="-flto"
+        build() {
+            "$source_dir/configure" "$@"
+            make -j"$jobs"
+            make install
+        }
+        ;;
+    openssl)
+        require_program perl
+        # The certificate directory of the system openssl is used so that certificate
+        # verification keeps working the same way as it does with the system openssl.
+        openssl_dir=$(openssl version -d 2>/dev/null | sed -n 's/^OPENSSLDIR: "\(.*\)"$/\1/p')
+        if [ -z "$openssl_dir" ]; then
+            openssl_dir=/etc/ssl
+        fi
+        set -- --prefix="$prefix" \
+            --libdir=lib \
+            --openssldir="$openssl_dir" \
+            no-shared \
+            no-apps \
+            no-docs \
+            no-tests \
+            no-legacy \
+            no-engine \
+            no-comp \
+            no-quic \
+            no-ssl3 \
+            no-weak-ssl-ciphers \
+            no-cms \
+            no-ct \
+            no-ts \
+            no-ocsp \
+            no-srp \
+            no-psk \
+            no-dsa \
+            no-ec2m \
+            no-gost \
+            no-idea \
+            no-md2 \
+            no-md4 \
+            no-mdc2 \
+            no-rc2 \
+            no-rc4 \
+            no-rc5 \
+            no-bf \
+            no-cast \
+            no-seed \
+            no-camellia \
+            no-whirlpool \
+            no-rmd160 \
+            no-sm2 \
+            no-sm3 \
+            no-sm4 \
+            no-siphash \
+            -O3 -flto -fPIC
+        build() {
+            "$source_dir/Configure" "$@"
+            make -j"$jobs"
+            make install_sw
+        }
+        ;;
+    srt)
+        require_program cmake
+        set -- -DCMAKE_BUILD_TYPE=Release \
+            -DCMAKE_INSTALL_PREFIX="$prefix" \
+            -DCMAKE_INSTALL_LIBDIR=lib \
+            -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=ON \
+            -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
+            -DENABLE_SHARED=OFF \
+            -DENABLE_STATIC=ON \
+            -DENABLE_APPS=OFF \
+            -DENABLE_EXAMPLES=OFF \
+            -DENABLE_TESTING=OFF \
+            -DENABLE_UNITTESTS=OFF \
+            -DUSE_ENCLIB=openssl \
+            -DOPENSSL_ROOT_DIR="$prefix" \
+            -DOPENSSL_USE_STATIC_LIBS=ON
+        build() {
+            cmake -S "$source_dir" -B "$build_dir" "$@"
+            cmake --build "$build_dir" -j"$jobs"
+            cmake --install "$build_dir"
+        }
+        ;;
+    ffmpeg)
+        require_program nasm
+
+        encoders=aac,flac,libx264,libopus,h264_nvenc,hevc_nvenc,av1_nvenc,h264_vaapi,hevc_vaapi,vp8_vaapi,vp9_vaapi,h264_vulkan,hevc_vulkan
+        muxers=mp4,mov,matroska,webm,flv,mpegts,hls,whip
+        protocols=file,pipe,tcp,udp,http,https,tls,rtmp,rtmps,libsrt
+        filters=abuffer,abuffersink,amix,aresample,aformat,anull
+
+        if pkg-config --atleast-version=1.16 libva; then
+            encoders=$encoders,av1_vaapi
+        else
+            echo "warning: libva is too old for av1 vaapi encoding" >&2
+        fi
+
+        if pkg-config --atleast-version=1.4.317 vulkan; then
+            encoders=$encoders,av1_vulkan
+        else
+            echo "warning: the vulkan headers are too old for av1 vulkan encoding" >&2
+        fi
+
+        # ffmpeg ignores $CC and the same compiler as gpu-screen-recorder has to be
+        # used because lto objects are not compatible between compilers.
+        set -- --prefix="$prefix" \
+            --cc="$compiler" \
+            --pkg-config-flags=--static \
+            --disable-debug \
+            --disable-everything \
+            --disable-autodetect \
+            --disable-programs \
+            --disable-doc \
+            --disable-avdevice \
+            --disable-swscale \
+            --disable-shared \
+            --enable-static \
+            --enable-pic \
+            --enable-lto \
+            --enable-gpl \
+            --enable-version3 \
+            --enable-network \
+            --enable-encoder="$encoders" \
+            --enable-muxer="$muxers" \
+            --enable-protocol="$protocols" \
+            --enable-filter="$filters" \
+            --enable-bsf=extract_extradata \
+            --enable-libx264 \
+            --enable-libopus \
+            --enable-libsrt \
+            --enable-openssl \
+            --enable-ffnvcodec \
+            --enable-nvenc \
+            --enable-cuda \
+            --enable-vaapi \
+            --enable-vulkan
+        build() {
+            "$source_dir/configure" "$@"
+            make -j"$jobs"
+            make install
+        }
+        ;;
+    *)
+        echo "error: unknown library $library" >&2
+        exit 1
+        ;;
+esac
+
+# Rebuilding takes a long time, only do it when the source or the configuration changed.
+stamp="$source_dir $compiler $*"
+if [ -f "$stamp_file" ] && [ "$(cat "$stamp_file")" = "$stamp" ]; then
+    exit 0
+fi
+
+rm -rf "$build_dir"
+mkdir -p "$build_dir"
+
+echo "Building $library, this takes a while. Output is written to $log_file" >&2
+
+(
+    cd "$build_dir"
+    build "$@"
+) >"$log_file" 2>&1 || {
+    echo "error: failed to build $library, see $log_file for details:" >&2
+    tail -n 30 "$log_file" >&2
+    exit 1
+}
+
+printf '%s' "$stamp" > "$stamp_file"