set(FFMPEG_INSTALL_PATH "${EXTERNAL_LIBS_OUTPUT_PATH}/ffmpeg")
set(EXTERNAL_LIBS_PATH "${EXTERNAL_LIBS_PATH};${FFMPEG_INSTALL_PATH}/lib" CACHE STRING INTERNAL FORCE)
find_program(NASM nasm)
if(NOT NASM)
  message("nasm not found. Now install.")
  execute_process(COMMAND sudo apt install nasm WORKING_DIRECTORY ${EXTERNAL_SOURCE_PATH}/)
endif()
if(${TARGET_PLATFORM} MATCHES ${DEFINE_LINUX})
    set(CONFIGURE_COMMAND "--enable-cross-compile --target-os=linux --arch=x86_64 \
    --cc=${CMAKE_C_COMPILER} \
    --cxx=${CMAKE_CXX_COMPILER} \
    --prefix=${FFMPEG_INSTALL_PATH} \
    --enable-parsers --enable-decoder=h264 --enable-libfdk-aac \
    --enable-ffmpeg --enable-static \
    --enable-gpl --enable-nonfree --enable-version3 --enable-small \
    --enable-muxer=mov --enable-muxer=mp4 \
    --enable-decoder=aac --enable-decoder=pcm_alaw --enable-encoder=pcm_alaw \
    --enable-demuxer=mov \
    --enable-protocol=file --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb --enable-bsf=hevc_mp4toannexb \
    --extra-libs=-lm \
    --extra-cflags=\"-I${EXTERNAL_LIBS_OUTPUT_PATH}/fdk-aac/include\" \
    --extra-ldflags=\"-L${EXTERNAL_LIBS_OUTPUT_PATH}/fdk-aac/lib\"")
else()
    set(CONFIGURE_COMMAND "--enable-cross-compile --target-os=linux --arch=arm64 \
    --cc=${CMAKE_C_COMPILER} \
    --cxx=${CMAKE_CXX_COMPILER} \
    --prefix=${FFMPEG_INSTALL_PATH} \
    --disable-asm --enable-parsers --disable-decoders --enable-decoder=h264 --enable-libfdk-aac \
    --disable-debug --enable-ffmpeg --enable-shared --enable-static --disable-stripping --disable-doc \
    --enable-gpl --enable-nonfree --enable-version3 --enable-small \
    --disable-mipsdsp --disable-mipsdspr2 \
    --disable-encoders \
    --disable-muxers --enable-muxer=mov --enable-muxer=mp4 --enable-encoder=mpeg4 \
    --enable-decoder=aac --enable-encoder=aac --enable-decoder=pcm_alaw --enable-encoder=pcm_alaw \
    --disable-filters \
    --enable-demuxer=mov \
    --disable-parsers \
    --disable-protocols --enable-protocol=file \
    --disable-bsfs --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb --enable-bsf=hevc_mp4toannexb \
    --disable-indevs \
    --disable-outdevs --disable-ffprobe --disable-ffmpeg --disable-ffplay --disable-debug \
    --extra-libs=-lm \
    --extra-cflags=\"-I${EXTERNAL_LIBS_OUTPUT_PATH}/fdk-aac/include\" \
    --extra-ldflags=\"-L${EXTERNAL_LIBS_OUTPUT_PATH}/fdk-aac/lib\"")
endif()
message("Compile ffmpeg comand : ${CONFIGURE_COMMAND}")
add_custom_command(
    OUTPUT ${EXTERNAL_LIBS_OUTPUT_PATH}/fdk-aac/lib/libfdk-aac.a
    COMMAND echo "Did not found fdk-aac lib in output_files, now compile fdk-aac."
    COMMAND make fdk_aac
    WORKING_DIRECTORY ${PLATFORM_PATH}/cmake-shell/
)
add_custom_target(
    ffmpeg
    DEPENDS ${EXTERNAL_LIBS_OUTPUT_PATH}/fdk-aac/lib/libfdk-aac.a
    COMMAND echo "Now compile ffmpeg, please wait..."
    COMMAND test -f ${EXTERNAL_SOURCE_PATH}/ffmpeg/ffmpeg-6.1.1/Makefile || tar -xf ffmpeg_6.1.1.orig.tar.xz
    COMMAND chmod 777 -R ffmpeg-6.1.1
    COMMAND cd ffmpeg-6.1.1 && bash -c "./configure ${CONFIGURE_COMMAND}"
    COMMAND cd ffmpeg-6.1.1 && make
    COMMAND cd ffmpeg-6.1.1 && make install
    COMMAND cd ffmpeg-6.1.1 && make clean
    WORKING_DIRECTORY ${EXTERNAL_SOURCE_PATH}/ffmpeg/
)

add_custom_target(
  remove_ffmpeg_source_files
  COMMAND rm -rf ffmpeg-6.1.1
  WORKING_DIRECTORY ${EXTERNAL_SOURCE_PATH}/ffmpeg/
)
 
# 将clean目标依赖于我们自定义的clean_script目标
add_dependencies(sdk_clean remove_ffmpeg_source_files)