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| author | Michael Niedermayer <michaelni@gmx.at> | 2008-12-20 23:11:30 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2008-12-20 23:11:30 +0000 |
| commit | 66c07ca96f0703134cd52f2332186c286f3dab39 (patch) | |
| tree | 9126374fa5c98eed36d08c23e1df8cece44bb3d9 /libavcodec/h264.c | |
| parent | 6beb8b2612e9f212fb1415647be4c5e87a7f1b97 (diff) | |
| download | ffmpeg-66c07ca96f0703134cd52f2332186c286f3dab39.tar.gz | |
Optimize get_dct8x8_allowed().
30 cpu cycles faster on pentium dual.
Originally committed as revision 16248 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/h264.c')
| -rw-r--r-- | libavcodec/h264.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/libavcodec/h264.c b/libavcodec/h264.c index 5a2bb7f5c2..202ff91f92 100644 --- a/libavcodec/h264.c +++ b/libavcodec/h264.c @@ -4039,13 +4039,10 @@ static inline int get_level_prefix(GetBitContext *gb){ } static inline int get_dct8x8_allowed(H264Context *h){ - int i; - for(i=0; i<4; i++){ - if(!IS_SUB_8X8(h->sub_mb_type[i]) - || (!h->sps.direct_8x8_inference_flag && IS_DIRECT(h->sub_mb_type[i]))) - return 0; - } - return 1; + if(h->sps.direct_8x8_inference_flag) + return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8 )*0x0001000100010001ULL)); + else + return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8|MB_TYPE_DIRECT2)*0x0001000100010001ULL)); } /** |