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| author | Michael Niedermayer <michaelni@gmx.at> | 2007-12-21 10:01:04 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2007-12-21 10:01:04 +0000 |
| commit | 815c81c0a732c38675733dbb501d7a5c5fce556e (patch) | |
| tree | f68840341d8d929212cbcbd9c6b0a66b916f7be6 | |
| parent | 91fd7398f4c9802b9c7188fc908a8f31acef5932 (diff) | |
| download | ffmpeg-815c81c0a732c38675733dbb501d7a5c5fce556e.tar.gz | |
30% faster h264_chroma_mc8_c(), this also prevents a possible out of
array read.
Originally committed as revision 11288 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/dsputil.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c index 6104eb9b7a..e3b5db7479 100644 --- a/libavcodec/dsputil.c +++ b/libavcodec/dsputil.c @@ -1478,6 +1478,7 @@ static void OPNAME ## h264_chroma_mc8_c(uint8_t *dst/*align 8*/, uint8_t *src/*a \ assert(x<8 && y<8 && x>=0 && y>=0);\ \ + if(D){\ for(i=0; i<h; i++)\ {\ OP(dst[0], (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1]));\ @@ -1491,6 +1492,23 @@ static void OPNAME ## h264_chroma_mc8_c(uint8_t *dst/*align 8*/, uint8_t *src/*a dst+= stride;\ src+= stride;\ }\ + }else{\ + const int E= B+C;\ + const int step= C ? stride : 1;\ + for(i=0; i<h; i++)\ + {\ + OP(dst[0], (A*src[0] + E*src[step+0]));\ + OP(dst[1], (A*src[1] + E*src[step+1]));\ + OP(dst[2], (A*src[2] + E*src[step+2]));\ + OP(dst[3], (A*src[3] + E*src[step+3]));\ + OP(dst[4], (A*src[4] + E*src[step+4]));\ + OP(dst[5], (A*src[5] + E*src[step+5]));\ + OP(dst[6], (A*src[6] + E*src[step+6]));\ + OP(dst[7], (A*src[7] + E*src[step+7]));\ + dst+= stride;\ + src+= stride;\ + }\ + }\ } #define op_avg(a, b) a = (((a)+(((b) + 32)>>6)+1)>>1) |