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Change RGB2YUV_SHIFT from 16 to 15 to make it able to work 

with 16bit signed constants (like SIMD might use).

Originally committed as revision 27568 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
This commit is contained in:
Michael Niedermayer 2008-09-10 16:39:56 +00:00
parent ba83d86299
commit 6b79dbce0c
2 changed files with 3 additions and 5 deletions
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2
libswscale/swscale.c
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@ -152,7 +152,7 @@ unsigned swscale_version(void)
|| isBGR(x) \
)
#define RGB2YUV_SHIFT 16
#define RGB2YUV_SHIFT 15
#define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
#define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))
#define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))

6
libswscale/swscale_template.c
View File

@ -1891,10 +1891,8 @@ static inline void RENAME(name ## _half)(uint8_t *dstU, uint8_t *dstV, uint8_t *
\
g>>=shg;\
\
dstU[i]= (((RU)>>1)*r + ((GU)>>1)*g + ((BU)>>1)*b + (257<<((S)-1)))>>(S);\
dstV[i]= (((RV)>>1)*r + ((GV)>>1)*g + ((BV)>>1)*b + (257<<((S)-1)))>>(S);\
/* dstU[i]= ((RU)*r + (GU)*g + (BU)*b + (257<<(S)))>>((S)+1);\
dstV[i]= ((RV)*r + (GV)*g + (BV)*b + (257<<(S)))>>((S)+1);*/\
dstU[i]= ((RU)*r + (GU)*g + (BU)*b + (257<<(S)))>>((S)+1);\
dstV[i]= ((RV)*r + (GV)*g + (BV)*b + (257<<(S)))>>((S)+1);\
}\
}