kYScale           136 3rdparty/libwebp/dsp/yuv.h #define kRCst (-kYScale * 16 - kVToR * 128 + YUV_HALF)
kYScale           137 3rdparty/libwebp/dsp/yuv.h #define kGCst (-kYScale * 16 + kUToG * 128 + kVToG * 128 + YUV_HALF)
kYScale           138 3rdparty/libwebp/dsp/yuv.h #define kBCst (-kYScale * 16 - kUToB * 128 + YUV_HALF)
kYScale           151 3rdparty/libwebp/dsp/yuv.h   return kYScale * y + kVToR * v + kRCst;
kYScale           155 3rdparty/libwebp/dsp/yuv.h   return kYScale * y - kUToG * u - kVToG * v + kGCst;
kYScale           159 3rdparty/libwebp/dsp/yuv.h   return kYScale * y  + kUToB * u + kBCst;