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| author | Jason Garrett-Glaser <darkshikari@gmail.com> | 2008-07-28 15:42:49 +0000 |
|---|---|---|
| committer | Jason Garrett-Glaser <darkshikari@gmail.com> | 2008-07-28 15:42:49 +0000 |
| commit | aa6a89aa792ec62dfa08d44e29406ad96aa8103e (patch) | |
| tree | 1e7242d7d8ec25b4ed8a352e4b418890539a12e5 | |
| parent | 2754fe8ba5519026d51af0edd2f0d05c6edfd84c (diff) | |
| download | ffmpeg-aa6a89aa792ec62dfa08d44e29406ad96aa8103e.tar.gz | |
Small h264 decoding speed optimization: while->do/while
Originally committed as revision 14459 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/h264.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/libavcodec/h264.c b/libavcodec/h264.c index 2c24787e48..62bc05e281 100644 --- a/libavcodec/h264.c +++ b/libavcodec/h264.c @@ -5356,10 +5356,10 @@ static av_always_inline void decode_cabac_residual_internal( H264Context *h, DCT } } - while( coeff_count-- ) { + do { uint8_t *ctx = coeff_abs_level1_ctx[node_ctx] + abs_level_m1_ctx_base; - int j= scantable[index[coeff_count]]; + int j= scantable[index[--coeff_count]]; if( get_cabac( CC, ctx ) == 0 ) { node_ctx = coeff_abs_level_transition[0][node_ctx]; @@ -5396,7 +5396,7 @@ static av_always_inline void decode_cabac_residual_internal( H264Context *h, DCT block[j] = (get_cabac_bypass_sign( CC, -coeff_abs ) * qmul[j] + 32) >> 6; } } - } + } while( coeff_count ); #ifdef CABAC_ON_STACK h->cabac.range = cc.range ; h->cabac.low = cc.low ; |