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| author | Michael Niedermayer <michaelni@gmx.at> | 2006-10-13 14:21:25 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2006-10-13 14:21:25 +0000 |
| commit | 68a205edef062ab8f583a40ab8607a28faedb3b2 (patch) | |
| tree | 600fbde1c81f9d2d61a7401ae282741a9f8dce74 /libavcodec | |
| parent | a991b1fecbd8c9e6f4fc31c191bd12e4be27dbf7 (diff) | |
| download | ffmpeg-68a205edef062ab8f583a40ab8607a28faedb3b2.tar.gz | |
dehack *ps_state indexing in the branchless decoder
Originally committed as revision 6683 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/cabac.c | 11 | ||||
| -rw-r--r-- | libavcodec/cabac.h | 5 |
2 files changed, 10 insertions, 6 deletions
diff --git a/libavcodec/cabac.c b/libavcodec/cabac.c index 94829e9065..0cd5144801 100644 --- a/libavcodec/cabac.c +++ b/libavcodec/cabac.c @@ -50,6 +50,7 @@ static const uint8_t lps_range[64][4]= { { 6, 8, 9, 11}, { 6, 7, 9, 10}, { 6, 7, 8, 9}, { 2, 2, 2, 2}, }; +uint8_t ff_h264_mlps_state[4*64]; uint8_t ff_h264_lps_range[2*65][4]; uint8_t ff_h264_lps_state[2*64]; uint8_t ff_h264_mps_state[2*64]; @@ -132,16 +133,18 @@ void ff_init_cabac_states(CABACContext *c){ ff_h264_lps_range[2*i+1][j+4]= lps_range[i][j]; } + ff_h264_mlps_state[128+2*i+0]= ff_h264_mps_state[2*i+0]= 2*mps_state[i]+0; + ff_h264_mlps_state[128+2*i+1]= ff_h264_mps_state[2*i+1]= 2*mps_state[i]+1; if( i ){ #ifdef BRANCHLESS_CABAC_DECODER - ff_h264_mps_state[-2*i-1]= 2*lps_state[i]+0; //FIXME yes this is not valid C but iam lazy, cleanup welcome - ff_h264_mps_state[-2*i-2]= 2*lps_state[i]+1; + ff_h264_mlps_state[128-2*i-1]= 2*lps_state[i]+0; + ff_h264_mlps_state[128-2*i-2]= 2*lps_state[i]+1; }else{ - ff_h264_mps_state[-2*i-1]= 1; - ff_h264_mps_state[-2*i-2]= 0; + ff_h264_mlps_state[128-2*i-1]= 1; + ff_h264_mlps_state[128-2*i-2]= 0; #else ff_h264_lps_state[2*i+0]= 2*lps_state[i]+0; ff_h264_lps_state[2*i+1]= 2*lps_state[i]+1; diff --git a/libavcodec/cabac.h b/libavcodec/cabac.h index b1a4ae6cb2..c07d07bb02 100644 --- a/libavcodec/cabac.h +++ b/libavcodec/cabac.h @@ -47,6 +47,7 @@ typedef struct CABACContext{ PutBitContext pb; }CABACContext; +extern uint8_t ff_h264_mlps_state[4*64]; extern uint8_t ff_h264_lps_range[2*65][4]; ///< rangeTabLPS extern uint8_t ff_h264_mps_state[2*64]; ///< transIdxMPS extern uint8_t ff_h264_lps_state[2*64]; ///< transIdxLPS @@ -480,7 +481,7 @@ static int always_inline get_cabac_inline(CABACContext *c, uint8_t * const state #endif /* CMOV_IS_FAST */ //eax:state ebx:low edx:mask esi:range - "movzbl "MANGLE(ff_h264_mps_state)"(%%eax), %%ecx \n\t" + "movzbl "MANGLE(ff_h264_mlps_state)"+128(%%eax), %%ecx \n\t" "movb %%cl, (%1) \n\t" "movl %%esi, %%edx \n\t" @@ -550,7 +551,7 @@ static int always_inline get_cabac_inline(CABACContext *c, uint8_t * const state c->range += (RangeLPS - c->range) & lps_mask; s^=lps_mask; - *state= ff_h264_mps_state[s]; + *state= (ff_h264_mlps_state+128)[s]; bit= s&1; lps_mask= ff_h264_norm_shift[c->range>>(CABAC_BITS+3)]; |