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Load the whole left side of mv&ref only when needed.

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30 cpu cycles faster

Originally committed as revision 22161 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2010-03-03 01:38:27 +00:00
parent 741a17e6b4
commit 16b802fe93
1 changed files with 12 additions and 0 deletions
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12
libavcodec/h264.h
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@ -995,6 +995,7 @@ static void fill_decode_caches(H264Context *h, int mb_type){
AV_WN32A(&h->ref_cache[list][scan8[0] + 0 - 1*8], ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101);
}
if(mb_type & (MB_TYPE_16x8|MB_TYPE_8x8)){
for(i=0; i<2; i++){
int cache_idx = scan8[0] - 1 + i*2*8;
if(USES_LIST(left_type[i], list)){
@ -1011,6 +1012,17 @@ static void fill_decode_caches(H264Context *h, int mb_type){
h->ref_cache[list][cache_idx+8]= (left_type[i]) ? LIST_NOT_USED : PART_NOT_AVAILABLE;
}
}
}else{
if(USES_LIST(left_type[0], list)){
const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
const int b8_xy= 4*left_xy[0] + 1;
AV_COPY32(h->mv_cache[list][scan8[0] - 1], s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[0]]);
h->ref_cache[list][scan8[0] - 1]= s->current_picture.ref_index[list][b8_xy + (left_block[0]&~1)];
}else{
AV_ZERO32(h->mv_cache [list][scan8[0] - 1]);
h->ref_cache[list][scan8[0] - 1]= left_type[0] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
}
}
if(USES_LIST(topright_type, list)){
const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;