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Special case for spatial direct MV predictor being 0. 

a little less than 200 cpu cycles faster with the cathedral sample.

Originally committed as revision 21785 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2010-02-13 02:47:41 +00:00
parent 828cfff63d
commit 812bfd7b44
1 changed files with 7 additions and 1 deletions
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8
libavcodec/h264_direct.c
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@ -265,7 +265,13 @@ single_col:
sub_mb_type |= MB_TYPE_L0L1;
}
if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
if(!is_b8x8 && (mv[0]|mv[1]) == 0){
fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, 0, 4);
fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, 0, 4);
*mb_type= (*mb_type & ~(MB_TYPE_8x8|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_P1L0|MB_TYPE_P1L1))|MB_TYPE_16x16|MB_TYPE_DIRECT2;
}else if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
int n=0;
for(i8=0; i8<4; i8++){
int x8 = i8&1;