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fix full range (jpeg yuv) chroma

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Originally committed as revision 22713 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
This commit is contained in:
Michael Niedermayer 2007-03-18 12:31:53 +00:00
parent d2bfaf8aae
commit edf97a75f9
3 changed files with 16 additions and 1 deletions
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7
libswscale/swscale.c
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@ -1876,7 +1876,12 @@ int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange
if(!srcRange){ if(!srcRange){
cy= (cy*255) / 219; cy= (cy*255) / 219;
oy= 16<<16; oy= 16<<16;
} }else{
crv= (crv*224) / 255;
cbu= (cbu*224) / 255;
cgu= (cgu*224) / 255;
cgv= (cgv*224) / 255;
}
cy = (cy *contrast )>>16; cy = (cy *contrast )>>16;
crv= (crv*contrast * saturation)>>32; crv= (crv*contrast * saturation)>>32;

5
libswscale/yuv2rgb.c
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@ -670,6 +670,11 @@ int yuv2rgb_c_init_tables (SwsContext *c, const int inv_table[4], int fullRange,
if(!fullRange){ if(!fullRange){
cy= (cy*255) / 219; cy= (cy*255) / 219;
oy= 16<<16; oy= 16<<16;
}else{
crv= (crv*224) / 255;
cbu= (cbu*224) / 255;
cgu= (cgu*224) / 255;
cgv= (cgv*224) / 255;
} }
cy = (cy *contrast )>>16; cy = (cy *contrast )>>16;

5
libswscale/yuv2rgb_init.c
View File

@ -263,6 +263,11 @@ int yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange,
if (fullRange) { if (fullRange) {
cy = 1 << 16; cy = 1 << 16;
oy = 0; oy = 0;
crv= (crv*224) / 255;
cbu= (cbu*224) / 255;
cgu= (cgu*224) / 255;
cgv= (cgv*224) / 255;
//FIXME maybe its cleaner if the tables where based on full range (*244/255)
} else { } else {
cy = ((1 << 16) * 255) / 219; cy = ((1 << 16) * 255) / 219;
oy= 16 << 16; oy= 16 << 16;