[FFmpeg-cvslog] r27568 - in trunk/libswscale: swscale.c swscale_template.c

[michael]

Author: michael
Date: Wed Sep 10 18:39:56 2008
New Revision: 27568

Log:
Change RGB2YUV_SHIFT from 16 to 15 to make it able to work
with 16bit signed constants (like SIMD might use).


Modified:
   trunk/libswscale/swscale.c
   trunk/libswscale/swscale_template.c

Modified: trunk/libswscale/swscale.c
==============================================================================
--- trunk/libswscale/swscale.c	(original)
+++ trunk/libswscale/swscale.c	Wed Sep 10 18:39:56 2008
@@ -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))

Modified: trunk/libswscale/swscale_template.c
==============================================================================
--- trunk/libswscale/swscale_template.c	(original)
+++ trunk/libswscale/swscale_template.c	Wed Sep 10 18:39:56 2008
@@ -1891,10 +1891,8 @@ static inline void RENAME(name ## _half)
 \
         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);\
     }\
 }