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Documenting the ffmpeg-android-maker-2.sh

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ffmpeg_4.4.2
Javernaut 5 years ago
parent 7f016aac6d
commit 15c24ace5a
3 changed files with 95 additions and 46 deletions
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  1. 88
      ffmpeg-android-maker-2.sh
  2. 29
      scripts/ffmpeg/download.sh
  3. 24
      scripts/parse-arguments.sh

88
ffmpeg-android-maker-2.sh
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@ -1,12 +1,34 @@
source scripts/export-core-variables.sh
source scripts/export-host-variables.sh
source scripts/parse-arguments.sh
# Defining essential directories
# The root of the project
export BASE_DIR="$( cd "$( dirname "$0" )" && pwd )"
# Directory that contains source code for FFmpeg and its dependencies
# Each library has its own subdirectory
# Multiple versions of the same library can be stored inside librarie's directory
export SOURCES_DIR=${BASE_DIR}/sources
# Directory to place some statistics about the build.
# Currently - the info about Text Relocations
export STATS_DIR=${BASE_DIR}/stats
# Directory that contains helper scripts and
# scripts to download and build FFmpeg and each dependency separated by subdirectories
export SCRIPTS_DIR=${BASE_DIR}/scripts
# The directory to use by Android project
# All FFmpeg's libraries and headers are copied there
export OUTPUT_DIR=${BASE_DIR}/output
# Directory to use as a place to build/install FFmpeg and its dependencies
BUILD_DIR=${BASE_DIR}/build
# Separate directory to build FFmpeg to
export BUILD_DIR_FFMPEG=$BUILD_DIR/ffmpeg
# All external libraries are installed to a single root
# to make easier referencing them when FFmpeg is being built.
export BUILD_DIR_EXTERNAL=$BUILD_DIR/external
# Function that copies *.so files and headers of the current ANDROID_ABI
# to the proper place inside OUTPUT_DIR
function prepareOutput() {
OUTPUT_LIB=${OUTPUT_DIR}/lib/${ANDROID_ABI}
mkdir -p ${OUTPUT_LIB}
# CURRENT_INSTALL_PATH !
cp ${BUILD_DIR_FFMPEG}/${ANDROID_ABI}/lib/*.so ${OUTPUT_LIB}
OUTPUT_HEADERS=${OUTPUT_DIR}/include/${ANDROID_ABI}
@ -14,11 +36,12 @@ function prepareOutput() {
cp -r ${BUILD_DIR_FFMPEG}/${ANDROID_ABI}/include/* ${OUTPUT_HEADERS}
}
# Saving stats about text relocation presence.
# If the result file doesn't have 'TEXTREL' at all, then we are good.
# Otherwise the whole script is interrupted
function checkTextRelocations() {
# Saving stats about text relocation presence.
# If the result file doesn't have 'TEXTREL' at all, then we are good.
TEXT_REL_STATS_FILE=${STATS_DIR}/text-relocations.txt
${CROSS_PREFIX}readelf --dynamic ${BUILD_DIR_FFMPEG}/${ABI}/lib/*.so | grep 'TEXTREL\|File' >> ${TEXT_REL_STATS_FILE}
${CROSS_PREFIX}readelf --dynamic ${BUILD_DIR_FFMPEG}/${ANDROID_ABI}/lib/*.so | grep 'TEXTREL\|File' >> ${TEXT_REL_STATS_FILE}
if grep -q TEXTREL ${TEXT_REL_STATS_FILE}; then
echo "There are text relocations in output files:"
@ -27,41 +50,74 @@ function checkTextRelocations() {
fi
}
# Actual work of the script
# Clearing previously created binaries
rm -rf ${BUILD_DIR}
rm -rf ${STATS_DIR}
rm -rf ${OUTPUT_DIR}
mkdir -p ${STATS_DIR}
mkdir -p ${OUTPUT_DIR}
# Exporting more necessary variabls
source ${SCRIPTS_DIR}/export-host-variables.sh
source ${SCRIPTS_DIR}/parse-arguments.sh
# Treating FFmpeg as just a module to build after its dependencies
COMPONENTS_TO_BUILD=${EXTERNAL_LIBRARIES[@]}
COMPONENTS_TO_BUILD+=( "ffmpeg" )
# Get the source code of component to build
for COMPONENT in ${COMPONENTS_TO_BUILD[@]}
do
export ENSURE_SOURCE_DIR=$SOURCES_DIR/$COMPONENT
mkdir -p ${ENSURE_SOURCE_DIR}
source scripts/${COMPONENT}/download.sh
echo "Getting source code of the component: ${COMPONENT}"
SOURCE_DIR_FOR_COMPONENT=${SOURCES_DIR}/${COMPONENT}
mkdir -p ${SOURCE_DIR_FOR_COMPONENT}
cd ${SOURCE_DIR_FOR_COMPONENT}
# Executing the component-specific script for downloading the source code
source ${SCRIPTS_DIR}/${COMPONENT}/download.sh
# The download.sh script has to export SOURCES_DIR_$COMPONENT variable
# with actual path of the source code. This is done for possiblity to switch
# between different verions of a component.
# If it isn't set, consider SOURCE_DIR_FOR_COMPONENT as the proper value
COMPONENT_SOURCES_DIR_VARIABLE=SOURCES_DIR_${COMPONENT}
if [[ -z "${!COMPONENT_SOURCES_DIR_VARIABLE}" ]]; then
export SOURCES_DIR_${COMPONENT}=${SOURCE_DIR_FOR_COMPONENT}
fi
# Returning to the rood directory. Just in case.
cd ${BASE_DIR}
done
# Build all libraries for each enabled arch
# ABIS_TO_BUILD=("armeabi-v7a" "arm64-v8a" "x86" "x86_64")
# ABIs to build FFmpeg for.
# x86 is the first, because it is likely to have Text Relocations.
# In this case the rest ABIs will not be assembled at all.
# ABIS_TO_BUILD=( "x86" "x86_64" "armeabi-v7a" "arm64-v8a" )
ABIS_TO_BUILD=("armeabi-v7a")
for ABI in ${ABIS_TO_BUILD[@]}
do
source scripts/export-build-variables.sh ${ABI}
# Exporting variables for the current ABI
source ${SCRIPTS_DIR}/export-build-variables.sh ${ABI}
for COMPONENT in ${COMPONENTS_TO_BUILD[@]}
do
echo "Building the component: ${COMPONENT}"
COMPONENT_SOURCES_DIR_VARIABLE=SOURCES_DIR_${COMPONENT}
echo ${!COMPONENT_SOURCES_DIR_VARIABLE}
# Going to the actual source code directory of the current component
cd ${!COMPONENT_SOURCES_DIR_VARIABLE}
# and executing the component-specific build script
${SCRIPTS_DIR}/${COMPONENT}/build.sh
cd $BASE_DIR
# Returning to the root directory. Just in case.
cd ${BASE_DIR}
done
# Check for text rels
checkTextRelocations
prepareOutput

29
scripts/ffmpeg/download.sh
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@ -1,31 +1,24 @@
# Expecting FFMPEG_SOURCE_TYPE and FFMPEG_SOURCE_VALUE variables
# Script to download FFmpeg's source code
# Relies on FFMPEG_SOURCE_TYPE and FFMPEG_SOURCE_VALUE variables
# to choose the valid origin and version
# Think of that names
# Expecting ENSURE_SOURCE_DIR - where source code has to be downloaded
# Exports SOURCES_DIR_FFMPEG - path where actual sources are stored
echo "Downloading sources for FFmpeg"
echo ${FFMPEG_SOURCE_TYPE}
echo ${FFMPEG_SOURCE_VALUE}
# Exports SOURCES_DIR_ffmpeg - path where actual sources are stored
# Utility function
# Getting sources of a particular ffmpeg release.
# Same argument (ffmpeg version) produces the same source set.
# Getting sources of a particular FFmpeg release.
# Same argument (FFmpeg version) produces the same source set.
function ensureSourcesTar() {
FFMPEG_SOURCES=${ENSURE_SOURCE_DIR}/ffmpeg-${FFMPEG_SOURCE_VALUE}
FFMPEG_SOURCES=ffmpeg-${FFMPEG_SOURCE_VALUE}
if [[ ! -d "$FFMPEG_SOURCES" ]]; then
TARGET_FILE_NAME=ffmpeg-${FFMPEG_SOURCE_VALUE}.tar.bz2
TARGET_FILE_PATH=${ENSURE_SOURCE_DIR}/${TARGET_FILE_NAME}
curl https://www.ffmpeg.org/releases/${TARGET_FILE_NAME} --output ${TARGET_FILE_PATH}
tar xzf ${TARGET_FILE_PATH} -C ${ENSURE_SOURCE_DIR}
rm ${TARGET_FILE_PATH}
curl https://www.ffmpeg.org/releases/${TARGET_FILE_NAME} --output ${TARGET_FILE_NAME}
tar xzf ${TARGET_FILE_NAME} -C .
rm ${TARGET_FILE_NAME}
fi
export SOURCES_DIR_ffmpeg=$FFMPEG_SOURCES
export SOURCES_DIR_ffmpeg=$(pwd)/${FFMPEG_SOURCES}
}
# Utility function

24
scripts/parse-arguments.sh
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@ -35,18 +35,18 @@ do
shift
;;
# Arguments below enable certain external libraries to build into FFmpeg
--enable-libaom)
EXTERNAL_LIBRARIES+=( "libaom" )
shift
;;
--enable-libdav1d)
EXTERNAL_LIBRARIES+=( "libdav1d" )
shift
;;
--enable-libmp3lame)
EXTERNAL_LIBRARIES+=( "libmp3lame" )
shift
;;
# --enable-libaom)
# EXTERNAL_LIBRARIES+=( "libaom" )
# shift
# ;;
# --enable-libdav1d)
# EXTERNAL_LIBRARIES+=( "libdav1d" )
# shift
# ;;
# --enable-libmp3lame)
# EXTERNAL_LIBRARIES+=( "libmp3lame" )
# shift
# ;;
*)
echo "Unknown argument $artument"
;;

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