зеркало из https://github.com/mozilla/gecko-dev.git
48 строки
3.5 KiB
Plaintext
48 строки
3.5 KiB
Plaintext
This directory contains files used in gecko builds from FFmpeg
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(http://ffmpeg.org). The current files are from FFmpeg as of
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revision n3.4-1-g587fadaef1
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All source files match their path from the library's source archive.
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Currently, we only use the vp8 and vp9 portion of the library, and only on x86
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based platforms. If this changes, configuration files will most likely
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need to be updated.
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AVX2 must be disabled on Linux 32 bits due to the use of yasm 1.1 on the build bots.
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Once yasm is upgraded to 1.2 or later, AVX2 code could be re-enabled.
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Add --disable-avx2 to configure on those platforms.
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configuration files were generated as follow using the configure script:
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./configure --disable-everything --disable-protocols --disable-demuxers --disable-muxers --disable-filters --disable-programs --disable-doc --disable-parsers --enable-parser=vp8 --enable-parser=vp9 --enable-decoder=vp8 --enable-decoder=vp9 --disable-static --enable-shared --disable-debug --disable-sdl2 --disable-libxcb --disable-securetransport --disable-iconv --disable-swresample --disable-swscale --disable-avdevice --disable-avfilter --disable-avformat --disable-d3d11va --disable-dxva2 --disable-vaapi --disable-vda --disable-vdpau --disable-videotoolbox --enable-decoder=flac --enable-asm --enable-x86asm
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config*:
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replace: /HAVE_(MALLOC_H|ARC4RANDOM|LOCALTIME_R|MEMALIGN|POSIX_MEMALIGN)/d
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config_unix32.h:
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add to configure command: --disable-asm --disable-x86asm --cc='clang -m32'
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config_android.h:
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./configure --disable-everything --disable-protocols --disable-demuxers --disable-muxers --disable-filters --disable-programs --disable-doc --disable-parsers --disable-static --enable-shared --disable-debug --disable-sdl2 --disable-libxcb --disable-securetransport --disable-iconv --disable-swresample --disable-swscale --disable-avdevice --disable-avfilter --disable-avformat --disable-d3d11va --disable-dxva2 --disable-vaapi --disable-vda --disable-vdpau --disable-videotoolbox --enable-decoder=flac --disable-asm --cross-prefix=~/.mozbuild/android-ndk-r15c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi- --target-os=linux --arch=arm --enable-cross-compile --sysroot=~/.mozbuild/android-ndk-r15c/platforms/android-24/arch-arm
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config_unix32.h/config_unix64.h/config_unix64.asm:
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replace: s/HAVE_SYSCTL 1/HAVE_SYSCTL 0
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config_win32/64.h/asm:
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add to configure command: --toolchain=msvc
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Regenerate defaults_disabled.{h,asm} with:
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$ grep -E ".*_(INDEV|OUTDEV|DECODER|ENCODER|DEMUXER|MUXER|PARSER|FILTER|HWACCEL|PROTOCOL|ENCODERS|DECODERS|HWACCELS|INDEVS|OUTDEVS|FILTERS|DEMUXERS|MUXERS|PROTOCOLS|BSF) 0" config.h > ~/Work/Mozilla/mozilla-central/media/ffvpx/defaults_disabled.h
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$ grep -E ".*_(INDEV|OUTDEV|DECODER|ENCODER|DEMUXER|MUXER|PARSER|FILTER|HWACCEL|PROTOCOL|ENCODERS|DECODERS|HWACCELS|INDEVS|OUTDEVS|FILTERS|DEMUXERS|MUXERS|PROTOCOLS|BSF) 0" config.asm > ~/Work/Mozilla/mozilla-central/media/ffvpx/defaults_disabled.asm
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All new decoders/muxers/encoders/... should be added in the list of dummy functions found in libavcodec/dummy_funcs.c
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otherwise linkage will fail on Windows. On other platforms they are optimised out and aren't necessary.
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The GNU comm utility is a useful tool to compare and extract only the changes.
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To update the source tree, perform a diff on the files listed in FILES.
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The diffs should typically apply to the ffvpx tree.
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e.g. something like this would do:
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Run in the ffmpeg original tree:
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$ for i in `cat $PATH_CENTRAL/media/ffvpx/FILES`; do diff $REV_LASTSYNC HEAD >> patch.diff; done
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Then apply patch.diff on the ffvpx tree.
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Compilation will reveal if any files are missing.
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