[FFmpeg-devel] [RFC] use ff_avc_find_startcode in ff_find_start_code
Tue Feb 19 09:34:11 CET 2008
On Tue, Feb 19, 2008 at 04:07:29AM +0100, Michael Niedermayer wrote:
> On Mon, Feb 18, 2008 at 11:07:38PM +0100, Reimar D?ffinger wrote:
> > First I wonder if that ff_find_start_code function is
> > not quite buggy anyway, or is it intentional that it searches for
> > 00 00 01 00 in the part involving the state but for 00 00 01 ?? in the
> > later code?
> No, it does not.
Right, I missed it compares tmp, not *state.
> btw, as you already optimize startcode searches why not look at
> ff_h264_find_frame_end()? It should be more fun to understand and optimize :)
The reason is that the find_start_code uses 17% CPU on the sample I gave
above on my PC, downto < 11% with this change.
In addition to the fact that we have now 3 different functions to search
for a start code, so this is not only about optimizing.
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