YUV_MASK          141 3rdparty/libwebp/dsp/yuv.h   return ((v & ~YUV_MASK) == 0) ? (uint8_t)(v >> YUV_FIX)
YUV_MASK          146 3rdparty/libwebp/dsp/yuv.h   return ((v & ~YUV_MASK) == 0) ? (uint8_t)(v >> (YUV_FIX + (8 - N)))