__deps__ := YASM BZIP2 ZLIB FDKAAC LIBVPX LAME LIBOPUS
ifeq (1-mingw,$(BUILD.cross)-$(BUILD.system))
__deps__ += PTHREADW32
endif
ifeq (1,$(FEATURE.qsv))
__deps__ += LIBMFX
endif

$(eval $(call import.MODULE.defs,FFMPEG,ffmpeg,$(__deps__)))
$(eval $(call import.CONTRIB.defs,FFMPEG))

FFMPEG.FETCH.url = http://www.ffmpeg.org/releases/ffmpeg-3.4.tar.gz
FFMPEG.FETCH.url += https://download.handbrake.fr/handbrake/contrib/ffmpeg-3.4.tar.gz
FFMPEG.FETCH.sha256 = 6ed03b00404a3923e3c2f560248a9c9ad79fbaaee26d723f74aae6b31fe2bae6
## FFMPEG.FETCH.url =  https://download.handbrake.fr/handbrake/contrib/libav-12.2.tar.gz
## FFMPEG.FETCH.url += https://libav.org/releases/libav-12.2.tar.gz
## FFMPEG.FETCH.sha256 = 49c3ccda32458192c00ab25b30f4d1a6a4772b83458cbbf3a25b210d0688f55c

FFMPEG.CONFIGURE.deps  =
FFMPEG.CONFIGURE.host  =
FFMPEG.CONFIGURE.build =
FFMPEG.CONFIGURE.env.LOCAL_PATH = PATH="$(call fn.ABSOLUTE,$(CONTRIB.build/)bin):$(PATH)"
FFMPEG.BUILD.env                = PATH="$(call fn.ABSOLUTE,$(CONTRIB.build/)bin):$(PATH)"

# To build with nvenc: 
# See <https://dwijaybane.wordpress.com/2017/07/19/ffmpeg-with-nvidia-acceleration-on-ubuntu-16-04-nvenc-sdk/>
# 1) Copy NVENC SDK's Video_Codec_SDK_8.0.14/Samples/common/inc/*.h to /usr/local/include/
# 2) Build cudautils
#    wget http://developer.download.nvidia.com/compute/redist/ffmpeg/1511-patch/cudautils.zip
#    Copy cudautils.h and libcudautils.a are in their respective /usr/local/[include|lib]/

FFMPEG.CONFIGURE.extra = \
    --enable-gpl \
    --disable-doc \
    --disable-bsfs \
    --enable-bsf=aac_adtstoasc \
    --disable-vaapi \
    --disable-vdpau \
    --disable-network \
    --disable-programs \
    --disable-ffmpeg \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-ffserver \
    --disable-avdevice \
    --disable-muxers \
    --disable-decoder=crystalhd \
    --disable-decoder=h264_crystalhd \
    --disable-decoder=mpeg2_crystalhd \
    --disable-decoder=mpeg4_crystalhd \
    --disable-decoder=msmpeg4_crystalhd \
    --disable-decoder=vc1_crystalhd \
    --disable-decoder=wmv3_crystalhd \
    --disable-encoders \
    --enable-avresample \
    --enable-nvenc \
    --enable-libx264 \
    --enable-libmp3lame \
    --enable-encoder=aac \
    --enable-encoder=ac3 \
    --enable-encoder=eac3 \
    --enable-encoder=flac \
    --enable-encoder=mpeg2video \
    --enable-encoder=mpeg4 \
    --enable-encoder=libmp3lame \
    --enable-encoder=h264_nvenc \
    --enable-encoder=hevc_nvenc \
    --enable-libopus \
    --enable-encoder=libopus \
    --enable-libvpx \
    --enable-encoder=libvpx_vp8 \
    --disable-decoder=libvpx_vp8 \
    --enable-encoder=libvpx_vp9 \
    --disable-decoder=libvpx_vp9 \
    --enable-zlib \
    --enable-bzlib \
    --enable-pthreads \
    --cc="$(FFMPEG.GCC.gcc)" \
    --extra-ldflags="$(call fn.ARGS,FFMPEG.GCC,*archs *sysroot *minver ?extra) -L$(call fn.ABSOLUTE,$(CONTRIB.build/)lib)"

ifeq (1,$(FEATURE.fdk_aac))
FFMPEG.CONFIGURE.extra += \
    --enable-nonfree \
    --enable-libfdk-aac \
    --enable-encoder=libfdk_aac
endif

FFMPEG.CONFIGURE.extra += \
    --enable-muxer=matroska \
    --enable-muxer=webm \
    --enable-muxer=mov \
    --enable-muxer=mp4 \
    --enable-muxer=psp \
    --enable-muxer=ipod

## check against tuple: B-SYSTEM where B is { 0 | 1 } for cross-compiling flag
ifeq (0-cygwin,$(BUILD.cross)-$(BUILD.system))
    FFMPEG.GCC.args.extra += -fno-common
else ifeq (darwin,$(BUILD.system))
    ## section for darwin-archs
    FFMPEG.CONFIGURE.extra += --enable-cross-compile --arch=$(BUILD.machine) --target-os=darwin
else ifeq (1-mingw,$(BUILD.cross)-$(BUILD.system))
    FFMPEG.CONFIGURE.extra += \
        --target-os=mingw32 \
        --arch=$(BUILD.machine) \
        --enable-cross-compile --cross-prefix=$(BUILD.cross.prefix)
    FFMPEG.GCC.args.extra += -fno-common
    ifeq (1,$(FEATURE.local_pkgconfig))
        FFMPEG.CONFIGURE.extra += --pkg-config="$(call fn.ABSOLUTE,$(CONTRIB.build/)bin/$(PKGCONFIG.exe))"
    else
        FFMPEG.CONFIGURE.extra += --pkg-config=$(PKGCONFIG.exe)
    endif
endif

ifneq (none,$(FFMPEG.GCC.g))
    FFMPEG.CONFIGURE.extra += --enable-debug
    ifeq (max,$(FFMPEG.GCC.g))
        FFMPEG.CONFIGURE.extra += --extra-cflags="$(call fn.ARGS,FFMPEG.GCC,*archs *sysroot *minver ?extra) -I$(call fn.ABSOLUTE,$(CONTRIB.build/)include) -DDEBUG"
    else
        FFMPEG.CONFIGURE.extra += --extra-cflags="$(call fn.ARGS,FFMPEG.GCC,*archs *sysroot *minver ?extra) -I$(call fn.ABSOLUTE,$(CONTRIB.build/)include) -DNDEBUG"
    endif
else
    FFMPEG.CONFIGURE.extra += --disable-debug
    FFMPEG.CONFIGURE.extra += --extra-cflags="$(call fn.ARGS,FFMPEG.GCC,*archs *sysroot *minver ?extra) -I$(call fn.ABSOLUTE,$(CONTRIB.build/)include) -DNDEBUG"
endif

ifeq (none,$(FFMPEG.GCC.O))
    FFMPEG.CONFIGURE.extra += --disable-optimizations
endif

ifeq (1,$(FEATURE.qsv))
  FFMPEG.CONFIGURE.extra += --enable-libmfx
endif

## enable compile verbosity
FFMPEG.BUILD.extra = V=1

##
## llvm inline assembler (used in llvm-gcc and clang) runs out of registers
## on darwin i386 - unclear if it is a source code or llvm bug.
##
ifeq (darwin-i386,$(BUILD.system)-$(BUILD.machine))
    ## optimize mode hack: use clang
    ifneq (none,$(FFMPEG.GCC.O))
        FFMPEG.GCC.gcc = clang
    endif

    ## debug mode hack: omit frame pointer
    ifneq (none,$(FFMPEG.GCC.g))
        FFMPEG.GCC.args.extra += -fomit-frame-pointer
    endif
endif

## For POSIX.1-2001
ifeq (solaris,$(BUILD.system))
    FFMPEG.CONFIGURE.extra += --extra-libs=/usr/lib/values-xpg6.o
endif

## MPC8 Doesn't compile on SPARC
ifeq (solaris-sparc,$(BUILD.system)-$(BUILD.machine))
    FFMPEG.CONFIGURE.extra += --disable-demuxer=mpc8
endif