[FFmpeg-devel] [PATCH 1/4] h261, h263 decoders: convert to RL_VLC.

Reimar Döffinger Reimar.Doeffinger at gmx.de
Sun Aug 31 18:31:30 CEST 2014


On Sun, Aug 31, 2014 at 06:28:24PM +0200, Reimar Döffinger wrote:
> On Sun, Aug 31, 2014 at 05:44:09PM +0200, Michael Niedermayer wrote:
> > On Sun, Aug 31, 2014 at 04:48:41PM +0200, Reimar Döffinger wrote:
> > > Some additional optimizations in following patch.
> > 
> > what effect on speed do these patches have ?
> 
> With high error bars, with vsynth1 file, median of 3 runs, only around
> changed code:
> h261:
> 4447 decicycles in a, 65532 runs, 4 skips
> to
> 3894 decicycles in a, 65534 runs, 2 skips
> 
> h263:
> 5072 decicycles in a, 65532 runs, 4 skips
> to
> 3502 decicycles in a, 65533 runs, 3 skips
> 
> h263p:
> 5257 decicycles in a, 65533 runs, 3 skips
> to
> 7880 decicycles in a, 65532 runs, 4 skips
> 
> flv:
> 5291 decicycles in a, 65532 runs, 4 skips
> to
> 3609 decicycles in a, 65531 runs, 5 skips
> 
> Did not test the pure RL_VLC without optimizations.
> I guess the H263P one really doesn't like the close and reopen (?)

Nope, just me sucking at testing (copy-pasted wrong line)
Should read:
h263p:
11460 decicycles in a, 65533 runs, 3 skips
to
7880 decicycles in a, 65532 runs, 4 skips


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