RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

decrease ff_h264_norm_shift[] size 

Originally committed as revision 6596 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-10-09 00:59:42 +00:00
parent 158256a13a
commit c010d69a75
2 changed files with 9 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
libavcodec/cabac.c
View File

@ -72,23 +72,15 @@ const uint8_t ff_h264_lps_state[64]= {
36,36,37,37,37,38,38,63,
};
const uint8_t ff_h264_norm_shift[256]= {
9,8,7,7,6,6,6,6,5,5,5,5,5,5,5,5,
4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
const uint8_t ff_h264_norm_shift[128]= {
7,6,5,5,4,4,4,4,3,3,3,3,3,3,3,3,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
};
/**

6
libavcodec/cabac.h
View File

@ -51,7 +51,7 @@ typedef struct CABACContext{
extern const uint8_t ff_h264_lps_range[64][4];
extern const uint8_t ff_h264_mps_state[64];
extern const uint8_t ff_h264_lps_state[64];
extern const uint8_t ff_h264_norm_shift[256];
extern const uint8_t ff_h264_norm_shift[128];
void ff_init_cabac_encoder(CABACContext *c, uint8_t *buf, int buf_size);
@ -270,7 +270,7 @@ static void refill2(CABACContext *c){
int i, x;
x= c->low ^ (c->low-1);
i= 9 - ff_h264_norm_shift[x>>(CABAC_BITS+1)];
i= 7 - ff_h264_norm_shift[x>>(CABAC_BITS+1)];
x= -CABAC_MASK;
@ -393,7 +393,7 @@ asm(
#endif
renorm_cabac_decoder_once(c);
}else{
bit= ff_h264_norm_shift[RangeLPS>>17];
bit= ff_h264_norm_shift[RangeLPS>>19];
c->low -= c->range;
*state= c->lps_state[s];
c->range = RangeLPS<<bit;