Structured --arch, --cc and --cross-prefix evaluating

pull/10/head
Javernaut 5 years ago
parent 848ab4dec6
commit cbd525e033
  1. 4
      README.md
  2. 73
      ffmpeg-android-maker.sh

@ -7,8 +7,8 @@ Here is a script that downloads the source code of [FFmpeg](https://www.ffmpeg.o
The actual content of all this directories depends on how the FFmpeg was configured before assembling. For my purpose I enabled only *libavcodec*, *libavformat*, *libavutil* and *libswscale*, but you can set your own configuration to make the FFmpeg you need.
The version of FFmpeg here by default is **4.1.4** (but can be overridden). And the script expects to use **at least** Android NDK **r19** (*r20* also works ok). Starting with FFmpeg 4.1 and NDK r19 the whole process became much simpler.
## Supported Android architectures
## Supported Android ABIs
a
* armeabi-v7a
* arm64-v8a
* x86

@ -96,67 +96,78 @@ function ensureSources() {
esac
}
# Actual magic of configuring and compiling of FFmpeg for a certain architecture.
# Supported architectures are: armeabi-v7a, arm64-v8a, x86 and x86_64
# Actual magic of configuring and compiling of FFmpeg for a certain ABIs.
# Supported ABIs are: armeabi-v7a, arm64-v8a, x86 and x86_64
function assemble() {
cd ${FFMPEG_SOURCES}
ARCH=$1
ABI=$1
API_LEVEL=$2
TOOLCHAIN_PATH=${ANDROID_NDK_HOME}/toolchains/llvm/prebuilt/${HOST_TAG}
SYSROOT=${TOOLCHAIN_PATH}/sysroot
CC_ANDROID_POSTFIX=
EXTRA_CFLAGS=
EXTRA_CONFIGURE_FLAGS=
case $ARCH in
TARGET_TRIPLE_MACHINE_BINUTILS=
TARGET_TRIPLE_MACHINE_CC=
TARGET_TRIPLE_OS="android"
case $ABI in
armeabi-v7a)
FFMPEG_ARCH_FLAG=arm
CROSS_PREFIX=arm-linux-androideabi-
CC_PREFIX=armv7a
CC_ANDROID_POSTFIX=eabi
#cc armv7a-linux-androideabi16-clang
#binutils arm -linux-androideabi -ld
TARGET_TRIPLE_MACHINE_BINUTILS=arm
TARGET_TRIPLE_MACHINE_CC=armv7a
TARGET_TRIPLE_OS=androideabi
;;
arm64-v8a)
FFMPEG_ARCH_FLAG=aarch64
CROSS_PREFIX=aarch64-linux-android-
CC_PREFIX=aarch64
#cc aarch64-linux-android21-clang
#binutils aarch64-linux-android -ld
TARGET_TRIPLE_MACHINE_BINUTILS=aarch64
;;
x86)
FFMPEG_ARCH_FLAG=x86
CROSS_PREFIX=i686-linux-android-
CC_PREFIX=i686
#cc i686-linux-android16-clang
#binutils i686-linux-android -ld
TARGET_TRIPLE_MACHINE_BINUTILS=i686
EXTRA_CFLAGS=-mno-stackrealign
EXTRA_CONFIGURE_FLAGS=--disable-asm
;;
x86_64)
FFMPEG_ARCH_FLAG=x86_64
CROSS_PREFIX=x86_64-linux-android-
CC_PREFIX=x86_64
#cc x86_64-linux-android21-clang
#binutils x86_64-linux-android -ld
TARGET_TRIPLE_MACHINE_BINUTILS=x86_64
EXTRA_CONFIGURE_FLAGS=--x86asmexe=${TOOLCHAIN_PATH}/bin/yasm
;;
esac
CC=${TOOLCHAIN_PATH}/bin/${CC_PREFIX}-linux-android${CC_ANDROID_POSTFIX}${API_LEVEL}-clang
# If the cc-specific variable isn't set, we fallback to binutils version
[ -z "${TARGET_TRIPLE_MACHINE_CC}" ] && TARGET_TRIPLE_MACHINE_CC=${TARGET_TRIPLE_MACHINE_BINUTILS}
CROSS_PREFIX=${TOOLCHAIN_PATH}/bin/${TARGET_TRIPLE_MACHINE_BINUTILS}-linux-${TARGET_TRIPLE_OS}-
CC=${TOOLCHAIN_PATH}/bin/${TARGET_TRIPLE_MACHINE_CC}-linux-${TARGET_TRIPLE_OS}${API_LEVEL}-clang
DECODERS_TO_ENABLE=
while IFS= read -r line; do DECODERS_TO_ENABLE="${DECODERS_TO_ENABLE} --enable-decoder=$line"; done < ${BASE_DIR}/video_decoders_list.txt
./configure \
--prefix=${BUILD_DIR}/${ARCH} \
--disable-doc \
--prefix=${BUILD_DIR}/${ABI} \
--enable-cross-compile \
--cross-prefix=${TOOLCHAIN_PATH}/bin/${CROSS_PREFIX} \
--cross-prefix=${CROSS_PREFIX} \
--arch=${TARGET_TRIPLE_MACHINE_BINUTILS} \
--target-os=android \
--cc=${CC} \
--arch=${FFMPEG_ARCH_FLAG} \
--extra-cflags="-O3 -fPIC $EXTRA_CFLAGS" \
--sysroot=${SYSROOT} \
--enable-shared \
--disable-static \
--disable-debug \
--disable-doc \
--disable-runtime-cpudetect \
--disable-debug \
--disable-programs \
--disable-muxers \
--disable-encoders \
@ -177,7 +188,7 @@ function assemble() {
# Saving stats about text relocation presence.
# If the result file doesn't have 'TEXTREL' at all, then we are good.
${TOOLCHAIN_PATH}/bin/${CROSS_PREFIX}readelf --dynamic ${BUILD_DIR}/${ARCH}/lib/*.so | grep 'TEXTREL\|File' >> ${STATS_DIR}/text-relocations.txt
${CROSS_PREFIX}readelf --dynamic ${BUILD_DIR}/${ABI}/lib/*.so | grep 'TEXTREL\|File' >> ${STATS_DIR}/text-relocations.txt
cd ${BASE_DIR}
}
@ -194,16 +205,16 @@ function installLibs() {
}
function build() {
ARCH=$1
ABI=$1
ANDROID_API=$2
assemble ${ARCH} ${ANDROID_API}
installLibs ${ARCH}
assemble ${ABI} ${ANDROID_API}
installLibs ${ABI}
}
# Placing build header files into the /bin directory
# Note, there is a only one such a folder since this headers are the same for all architectures
# May not be true for different configurations though
# Placing build header files into the /bin directory.
# Note, there is a only one such a folder since this headers are the same for all ABIs.
# May not be true for different configurations though.
function installHeaders() {
cd ${BUILD_DIR}
cd "$(ls -1 | head -n1)"

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