getSSD            121 libswscale/swscale-example.c     ssdY= getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
getSSD            122 libswscale/swscale-example.c     ssdU= getSSD(ref[1], out[1], refStride[1], refStride[1], (w+1)>>1, (h+1)>>1);
getSSD            123 libswscale/swscale-example.c     ssdV= getSSD(ref[2], out[2], refStride[2], refStride[2], (w+1)>>1, (h+1)>>1);