[FFmpeg-devel] [PATCH] h264 parallelized,
Mon Jun 18 13:21:25 CEST 2007
Andreas ?man wrote:
> Michael Niedermayer wrote:
>> is this multitrheading specific? or a deblocking_filter == 2 fix? in the later
>> case it should be in a seperate patch
> It's required for multi-threading to work correctly. Otherwise,
> the xchg-code might incorrectly swap in invalid data since
> no deblocking has yet completed for the previous row
> (at least, thats how I understand it)
> Having said that, it does give a slight performance improvement
> for deblocking_type == 2, so i guess it could go in as a separate patch.
Here we go,
Don't swap back un-deblocked lines for intra prediction when
at slice boundaries for deblocking-type 2 content.
Save some speed, and when decoding slices in parallel it is
required or data corruption will occur
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