[FFmpeg-devel] [RFC] H.264 filter_mb_fast()

Måns Rullgård mans
Mon Jul 21 01:10:59 CEST 2008

Michael Niedermayer <michaelni at gmx.at> writes:

> Hi
> The current filter_mb_fast() in our decoder is buggy, it is a optimized
> special case of filter_mb() which had known and documented bugs.
> Iam planing to remove filter_mb_fast() and all code that becomes unused
> through that.
> I already considered that yesterday but then decided to fix the bug
> i found yesterday in it. Now as more issues turn up i dont think its
> worth the effort. filter_mb() itself is in need of cleanup and there are
> many obvious optimizations that can be done in it.
> The question this boils down to is:
> Is there someone who is willing to cleanup filter_mb_fast() and fix the
> bugs in it [this needs some x86 asm knowledge] ?
> If not then i will remove it in the next days.

If it is fixed, what speedup does it provide in an average case?

M?ns Rullg?rd
mans at mansr.com

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