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Let H.264 decoder skip deblocking across slices 

if running with multiple threads and CODEC_FLAGS2_FAST is set.
Thus, it may decode the slices in parallel to gain speed.

Patch by Andreas Öman: [andreas olebyn nu]

Originally committed as revision 10431 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Andreas Öman 2007-09-07 18:27:13 +00:00 committed by Benoit Fouet
parent 7a297ceb8f
commit ec970c2187
1 changed files with 6 additions and 0 deletions
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6
libavcodec/h264.c
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@ -3815,6 +3815,11 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
}
if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
/* Cheat slightly for speed:
Dont bother to deblock across slices */
h->deblocking_filter = 2;
} else {
h0->max_contexts = 1;
if(!h0->single_decode_warning) {
av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
@ -3822,6 +3827,7 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
}
if(h != h0)
return 1; // deblocking switched inside frame
}
}
if( s->avctx->skip_loop_filter >= AVDISCARD_ALL