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#!/usr/bin/env bash
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
# This script will build FFmpeg libraries for Android
usage() {
cat <<EOF
Usage: $(basename "$0") --abi <abi> --ndk <dir> --openssl <dir> --page-size <size> --output <dir>
Build FFmpeg libraries for Android.
Options:
--abi <abi> Target Android ABI. One of: arm64, arm32, x86, x86_64.
--ndk <dir> Path to the Android NDK root.
--openssl <dir> Path to the OpenSSL for Android root.
--page-size <size> One of: 4kb, 16kb.
--output <dir> Directory to install FFmpeg into.
-h, --help Show this help and exit.
Example:
$(basename "$0") --abi arm64 --ndk /path/to/ndk --openssl /path/to/openssl \\
--page-size 16kb --output /path/to/output
EOF
}
abi=""
ndk_root=""
openssl_root=""
page_size=""
target_dir=""
while [ $# -gt 0 ]; do
case "$1" in
-h|--help)
usage
exit 0
;;
--abi|--ndk|--openssl|--page-size|--output)
if [ $# -lt 2 ]; then
echo "Error: option '$1' requires a value." >&2
exit 2
fi
case "$1" in
--abi) abi="$2" ;;
--ndk) ndk_root="$2" ;;
--openssl) openssl_root="$2" ;;
--page-size) page_size="$2" ;;
--output) target_dir="$2" ;;
esac
shift
;;
*)
echo "Error: unknown argument '$1'." >&2
echo "" >&2
usage >&2
exit 2
;;
esac
shift
done
set -eux
source "${BASH_SOURCE%/*}/../unix/ffmpeg-installation-utils.sh"
is_populated_dir() {
local value="$1"
[ -n "$value" ] || return 1
[ -d "$value" ] || return 1
find "$value" -mindepth 1 -maxdepth 1 -print -quit >/dev/null 2>&1 || return 1
}
# patchelf 0.18.0 doesn't work correctly for Android binaries, so we require
# the exact version installed by install-patchelf.sh.
REQUIRED_PATCHELF_VERSION="0.17.2"
assert_patchelf_version() {
if ! command -v patchelf >/dev/null; then
echo "Error: patchelf is required for shared builds, but was not found." >&2
exit 1
fi
local patchelf_version
patchelf_version=$(patchelf --version | awk '{print $2}')
if [ "$patchelf_version" != "$REQUIRED_PATCHELF_VERSION" ]; then
echo "Error: patchelf version must be exactly $REQUIRED_PATCHELF_VERSION. Got: '$patchelf_version'" >&2
exit 1
fi
}
case "$abi" in
arm64|arm32|x86|x86_64)
;;
*)
echo "Error: --abi must be one of: arm64, arm32, x86, x86_64. Got: '$abi'" >&2
exit 1
;;
esac
if ! is_populated_dir "$ndk_root"; then
echo "Error: --ndk '$ndk_root' is not a populated directory." >&2
exit 1
fi
if ! is_populated_dir "$openssl_root"; then
echo "Error: --openssl '$openssl_root' is not a populated directory." >&2
exit 1
fi
if [ "$page_size" != "16kb" ] && [ "$page_size" != "4kb" ]; then
echo "Error: --page-size must be '4kb' or '16kb'. Got: '$page_size'" >&2
exit 1
fi
if [ -z "$target_dir" ]; then
echo "Error: --output must be set." >&2
exit 1
fi
if [ "$abi" == "x86" ]; then
target_toolchain_arch="i686-linux-android"
target_arch=x86
target_cpu=i686
openssl_libs="$openssl_root/x86"
libs_prefix="_x86"
elif [ "$abi" == "x86_64" ]; then
target_toolchain_arch="x86_64-linux-android"
target_arch=x86_64
target_cpu=x86-64
openssl_libs="$openssl_root/x86_64"
libs_prefix="_x86_64"
elif [ "$abi" == "arm32" ]; then
target_toolchain_arch="armv7a-linux-androideabi"
target_arch=arm
target_cpu=armv7-a
openssl_libs="$openssl_root/armeabi-v7a"
libs_prefix="_arm32-v7a"
elif [ "$abi" == "arm64" ]; then
target_toolchain_arch="aarch64-linux-android"
target_arch=aarch64
target_cpu=armv8-a
openssl_libs="$openssl_root/arm64-v8a"
libs_prefix="_arm64-v8a"
fi
for openssl_lib in libcrypto.so libssl.so; do
if [ ! -e "${openssl_libs}/${openssl_lib}" ]; then
echo "Error: '${openssl_libs}/${openssl_lib}' does not exist." >&2
exit 1
fi
done
openssl_include="$openssl_root/include"
if [ ! -d "$openssl_include" ]; then
echo "Error: OpenSSL include dir '$openssl_include' does not exist." >&2
exit 1
fi
build_type=$(get_ffmpeg_build_type)
# Shared builds use patchelf to fix up the dependencies after building.
if [[ "$build_type" == "shared" ]]; then
assert_patchelf_version
fi
ffmpeg_source_dir=$(download_ffmpeg)
build_ffmpeg_android() {
local target_dir=$1
mkdir -p "$target_dir"
local api_version=24
local ndk_host
if uname -a |grep -q "Darwin"; then
ndk_host=darwin-x86_64
else
ndk_host=linux-x86_64
fi
local toolchain=${ndk_root}/toolchains/llvm/prebuilt/${ndk_host}
local toolchain_bin=${toolchain}/bin
local sysroot=${toolchain}/sysroot
local cxx=${toolchain_bin}/${target_toolchain_arch}${api_version}-clang++
local cc=${toolchain_bin}/${target_toolchain_arch}${api_version}-clang
local ar=${toolchain_bin}/llvm-ar
local ranlib=${toolchain_bin}/llvm-ranlib
local strip=${toolchain_bin}/llvm-strip
local ffmpeg_config_options
ffmpeg_config_options=$(get_ffmpeg_config_options $build_type)
ffmpeg_config_options+=" --enable-cross-compile --target-os=android --enable-jni --enable-mediacodec --enable-openssl --enable-pthreads --enable-neon --disable-asm --disable-indev=android_camera"
ffmpeg_config_options+=" --arch=$target_arch --cpu=${target_cpu} --sysroot=${sysroot} --sysinclude=${sysroot}/usr/include/"
ffmpeg_config_options+=" --cc=${cc} --cxx=${cxx} --ar=${ar} --ranlib=${ranlib} --strip=${strip}"
ffmpeg_config_options+=" --extra-cflags=-I${openssl_include} --extra-ldflags=-L${openssl_libs}"
if [ "$page_size" == "16kb" ]; then
ffmpeg_config_options+=" --extra-ldflags=-Wl,-z,max-page-size=16384"
echo "FFmpeg Android using 16KB page sizes"
elif [ "$page_size" == "4kb" ]; then
echo "FFmpeg Android using 4KB page sizes"
fi
local build_dir="$ffmpeg_source_dir/build_android/$target_arch"
mkdir -p "$build_dir"
pushd "$build_dir"
# shellcheck disable=SC2086
"$ffmpeg_source_dir/configure" $ffmpeg_config_options --prefix="$target_dir"
# shellcheck disable=
make install -j4
popd
if [[ "$build_type" == "shared" ]]; then
local fix_dependencies="${BASH_SOURCE%/*}/../shared/fix_ffmpeg_dependencies.sh"
local page_size_arg=""
if [ "$page_size" == "16kb" ]; then
page_size_arg="16384"
fi
local set_rpath_arg="no"
local readelf_path_arg="${toolchain_bin}/llvm-readelf"
"$fix_dependencies" \
"$target_dir" \
"$libs_prefix" \
"$set_rpath_arg" \
"$page_size_arg" \
"$readelf_path_arg"
fi
}
build_ffmpeg_android "$target_dir"