[FFmpeg-devel] [PATCH] MMX2/SSSE3 VC1 loop filter

David Conrad lessen42
Mon Jul 5 06:11:30 CEST 2010

On Jul 4, 2010, at 2:30 PM, Carl Eugen Hoyos wrote:

> Kostya <kostya.shishkov <at> gmail.com> writes:
>>> It seems this got lost?
>> probably it just slipped past me - I was visiting my homeland then
>> If it still works then ok.
> I'd like to add two comments:
> Is there any indication that the C-version of the loop-filter is bit-exact? Am I
> correct that if not, this patch would not improve things?

IIRC the loop filter C code is correct, but the rules for applying it are rather convoluted and not implemented quite right for P frames.

Looks like I lost the fixes for I/B frames too, attached...

> And since I consider this a more important codec than VP8: Could this be truly
> reviewed to see possible additional optimisations? I assume loop filtering takes
> a lot of time...

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