[FFmpeg-devel] [PATCH] Port x264 SSE2 deblocking code to H.264 decoder

Måns Rullgård mans
Wed Dec 17 13:53:41 CET 2008

Reimar Doeffinger wrote:
> On Wed, Dec 17, 2008 at 03:55:17AM -0800, Jason Garrett-Glaser wrote:
>> But when its a couple-percent performance boost,
> It's not quite as simple. When a decoder is 1% slower it may already
> be useless to some, but personally it seems acceptable to me for the
> LGPL version (most that use it like that link it as a .so anyway which
> has a similar cost).
> But there is really not that much code in our H.264 decoder that is
> assembler-optimized, so I'd expect that removing such code could
> make more than 10% difference, and that IMO _is_ making it unusable (note
> I have no clue, and just make up values).

I have no figures for x86, but my ARM/NEON optimisations made H.264
decoding about 40% faster.

M?ns Rullg?rd
mans at mansr.com

More information about the ffmpeg-devel mailing list