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Code Issues Releases Activity

Optimize loop filtering of the left edge in MBAFF.

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60 cpu cycles speedup

Originally committed as revision 21467 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2010-01-26 22:59:19 +00:00
parent d3cb93b374
commit 16e5e39ab4
1 changed files with 9 additions and 8 deletions
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17
libavcodec/h264_loopfilter.c
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@ -633,18 +633,19 @@ void ff_h264_filter_mb( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint
*(uint64_t*)&bS[4]= 0x0004000400040004ULL; *(uint64_t*)&bS[4]= 0x0004000400040004ULL;
else { else {
for( i = 0; i < 8; i++ ) { for( i = 0; i < 8; i++ ) {
int mbn_xy = MB_FIELD ? h->left_mb_xy[i>>2] : h->left_mb_xy[i&1]; int j= MB_FIELD ? i>>2 : i&1;
int mbn_xy = h->left_mb_xy[j];
int mbn_type= h->left_type[j];
if( IS_INTRA( s->current_picture.mb_type[mbn_xy] ) ) if( IS_INTRA( mbn_type ) )
bS[i] = 4; bS[i] = 4;
else if( h->non_zero_count_cache[12+8*(i>>1)] != 0 || else{
((!h->pps.cabac && IS_8x8DCT(s->current_picture.mb_type[mbn_xy])) ? bS[i] = 1 + !!(h->non_zero_count_cache[12+8*(i>>1)] |
((!h->pps.cabac && IS_8x8DCT(mbn_type)) ?
(h->cbp_table[mbn_xy] & ((MB_FIELD ? (i&2) : (mb_y&1)) ? 8 : 2)) (h->cbp_table[mbn_xy] & ((MB_FIELD ? (i&2) : (mb_y&1)) ? 8 : 2))
: :
h->non_zero_count[mbn_xy][7+(MB_FIELD ? (i&3) : (i>>2)+(mb_y&1)*2)*8])) h->non_zero_count[mbn_xy][7+(MB_FIELD ? (i&3) : (i>>2)+(mb_y&1)*2)*8]));
bS[i] = 2; }
else
bS[i] = 1;
} }
} }