[FFmpeg-devel] [PATCH] Make decoding alpha optional for some codecs.
Reimar.Doeffinger at gmx.de
Sun Sep 22 16:22:37 CEST 2013
On Sat, Sep 21, 2013 at 09:39:02AM +0200, Reimar Döffinger wrote:
> On Thu, Sep 19, 2013 at 08:40:34PM +0200, Reimar Döffinger wrote:
> > For codecs where decoding of a whole plane can simply
> > be skipped, we should offer applications to not decode
> > alpha for better performance (ca. 30% less CPU usage
> > and 40% reduced memory bandwidth).
> > It also means applications do not need to implement support
> > (even if it is rather simple) for YUVA formats in order to be
> > able to play these files.
> > Tested by manually hacking avcodec_default_get_format,
> > suggestions for how to test in FATE welcome.
> Removed that last sentence locally. Except for ffv1 this is tested
> by FATE.
> I'll push soon if no comments.
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