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Compute the dequant coefficient table ptr outside the loop,

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this saves speed for the upcoming secondqp fix.
Patch by Andreas Öman % andreas A olebyn P nu %
Original thread:
Date: Jun 26, 2007 8:48 PM
subject: [FFmpeg-devel] Color corruption and seeking errors with H264 disc sources

Originally committed as revision 9497 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Andreas Öman 2007-07-06 07:55:37 +00:00 committed by Guillaume Poirier
parent 653387d8f0
commit 4bbdf13f9e
1 changed files with 4 additions and 2 deletions
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6
libavcodec/h264.c
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@ -5222,9 +5222,10 @@ decode_intra_mb:
if(cbp&0x20){
for(chroma_idx=0; chroma_idx<2; chroma_idx++){
const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][chroma_qp];
for(i4x4=0; i4x4<4; i4x4++){
const int index= 16 + 4*chroma_idx + i4x4;
if( decode_residual(h, gb, h->mb + 16*index, index, scan + 1, h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][chroma_qp], 15) < 0){
if( decode_residual(h, gb, h->mb + 16*index, index, scan + 1, qmul, 15) < 0){
return -1;
}
}
@ -6341,10 +6342,11 @@ decode_intra_mb:
if( cbp&0x20 ) {
int c, i;
for( c = 0; c < 2; c++ ) {
const uint32_t *qmul = h->dequant4_coeff[c+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp];
for( i = 0; i < 4; i++ ) {
const int index = 16 + 4 * c + i;
//av_log( s->avctx, AV_LOG_ERROR, "INTRA C%d-AC %d\n",c, index - 16 );
if( decode_cabac_residual(h, h->mb + 16*index, 4, index - 16, scan + 1, h->dequant4_coeff[c+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp], 15) < 0)
if( decode_cabac_residual(h, h->mb + 16*index, 4, index - 16, scan + 1, qmul, 15) < 0)
return -1;
}
}