[FFmpeg-devel] [PATCH] avcodec: add new Videotoolbox hwaccel.
Clément Bœsch
u at pkh.me
Mon Jul 27 14:14:19 CEST 2015
On Mon, Jul 27, 2015 at 06:13:30PM +0800, Zhang Rui wrote:
> 2015-07-15 21:51 GMT+08:00 Clément Bœsch <u at 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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