On Mon, Jul 27, 2015 at 06:13:30PM +0800, Zhang Rui wrote: > 2015-07-15 21:51 GMT+08:00 Clément Bœsch <u...@pkh.me>: > > On Sat, Jun 20, 2015 at 01:33:00PM +0200, Sebastien Zwickert wrote: > >> Old videtotoolbox patch rebased and updated to target the new HWAccel API. > >> As VDA is a wrapper of VideoToolbox framework, the changes base vda > >> implementation > >> upon the videotoolbox implementation to factorize common part of code. > >> > >> --- > >> Changelog | 1 + > >> MAINTAINERS | 1 + > >> Makefile | 5 +- > >> configure | 19 +- > >> ffmpeg.h | 2 + > >> ffmpeg_opt.c | 5 +- > >> ffmpeg_vda.c | 134 -------- > >> ffmpeg_videotoolbox.c | 147 +++++++++ > >> libavcodec/Makefile | 12 +- > >> libavcodec/allcodecs.c | 5 + > >> libavcodec/h263dec.c | 3 + > >> libavcodec/h264_slice.c | 4 + > >> libavcodec/mpeg12dec.c | 3 + > >> libavcodec/vda.c | 2 +- > >> libavcodec/vda_h264.c | 154 +--------- > >> libavcodec/vda_internal.h | 33 -- > >> libavcodec/vda_vt_internal.h | 57 ++++ > >> libavcodec/version.h | 2 +- > >> libavcodec/videotoolbox.c | 705 > >> +++++++++++++++++++++++++++++++++++++++++++ > >> libavcodec/videotoolbox.h | 126 ++++++++ > >> libavutil/pixdesc.c | 4 + > >> libavutil/pixfmt.h | 2 + > > > > I tried on iOS (iPhone 6+ so last one unless I'm mistaken) with a 240fps > > footage, and it seems the decode calls take more than 5ms, which seems not > > enough. Do you have any idea what could cause this? (I'm running a timer > > after/before avcodec_decode_video*()) > > 1. kVTDecodeFrame_EnableAsynchronousDecompression can make it faster, > but not suitable for sync-style API (avcodec_decode_video*())
not suitable in the sense that it wouldn't work, or it would have undesirable side effects? > 2. memcpy is murder (in av_image_copy()), but zero-copy needs some > kind of custom AVFrame. I wasn't counting av_image_copy(), unless you're refering to one involved in avcodec_decode_video()? [...] -- Clément B.
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