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Make update_partition_context faster

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Use vpx_memset for updating the partition contexts. Thanks to Noah
for pointing out the need of refactoring in this part.

Change-Id: I67fb78429d632298f1cd8a0be346cc76f79392a6
This commit is contained in:
Jingning Han 2013-06-26 11:50:14 -07:00
parent 49dee16879
commit 92479d9526
1 changed files with 5 additions and 24 deletions
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29
vp9/common/vp9_blockd.h
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@ -404,34 +404,15 @@ static INLINE void update_partition_context(MACROBLOCKD *xd,
int bwl = b_width_log2(sb_type);
int bhl = b_height_log2(sb_type);
int boffset = b_width_log2(BLOCK_SIZE_SB64X64) - bsl;
int i;
char pcvalue[2] = {~(0xe << boffset), ~(0xf <<boffset)};
assert(MAX(bwl, bhl) <= bsl);
// update the partition context at the end notes. set partition bits
// of block sizes larger than the current one to be one, and partition
// bits of smaller block sizes to be zero.
if ((bwl == bsl) && (bhl == bsl)) {
for (i = 0; i < bs; i++)
xd->left_seg_context[i] = ~(0xf << boffset);
for (i = 0; i < bs; i++)
xd->above_seg_context[i] = ~(0xf << boffset);
} else if ((bwl == bsl) && (bhl < bsl)) {
for (i = 0; i < bs; i++)
xd->left_seg_context[i] = ~(0xe << boffset);
for (i = 0; i < bs; i++)
xd->above_seg_context[i] = ~(0xf << boffset);
} else if ((bwl < bsl) && (bhl == bsl)) {
for (i = 0; i < bs; i++)
xd->left_seg_context[i] = ~(0xf << boffset);
for (i = 0; i < bs; i++)
xd->above_seg_context[i] = ~(0xe << boffset);
} else if ((bwl < bsl) && (bhl < bsl)) {
for (i = 0; i < bs; i++)
xd->left_seg_context[i] = ~(0xe << boffset);
for (i = 0; i < bs; i++)
xd->above_seg_context[i] = ~(0xe << boffset);
} else {
assert(0);
}
vpx_memset(xd->above_seg_context, pcvalue[bwl == bsl], bs);
vpx_memset(xd->left_seg_context, pcvalue[bhl == bsl], bs);
}
static INLINE int partition_plane_context(MACROBLOCKD *xd,