[Ffmpeg-devel] [PATCH] Snow mc_block mmx optimization

Guillaume POIRIER poirierg
Thu Mar 23 21:43:29 CET 2006


On 3/22/06, Oded Shimon <ods15 at ods15.dyndns.org> wrote:
> My turn!
> Just for qpel (I think? maybe also for odd resolutions)
> C version is faster as well, by a factor of ~2, and mmx version is about ~8
> times faster... md5sums pass. I think total speed increase is 10-20% for
> files encoded with qpel...

Doesn't apply here...

patch -p0 --dry-run < /tmp/snow-mc_block.patch
patching file libavcodec/dsputil.c
Hunk #1 succeeded at 3775 with fuzz 2 (offset 2 lines).
Hunk #2 succeeded at 4137 with fuzz 2 (offset 4 lines).
patching file libavcodec/dsputil.h
Hunk #2 FAILED at 344.
1 out of 2 hunks FAILED -- saving rejects to file libavcodec/dsputil.h.rej
patching file libavcodec/snow.c
patching file libavcodec/i386/dsputil_mmx.c
Hunk #1 succeeded at 2585 (offset 12 lines).
Hunk #2 succeeded at 3166 (offset 18 lines).


I am disillusioned enough to know that no man's opinion on any subject
is worth a damn unless backed up with enough genuine information to
make him really know what he's talking about.

-- H. P. Lovecraft (about the flamewars on FFmpeg and MPlayer-dev mailing lists)

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