GY                120 libswscale/rgb2rgb.c #define GY ((int)( 0.504 * (1 << RGB2YUV_SHIFT) + 0.5))
GY                870 libswscale/swscale.c #define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
GY                 85 libswscale/x86/rgb2rgb.c #define GY ((int)( 0.504*(1<<RGB2YUV_SHIFT)+0.5))