Add speed_rgb2yuv_sse.cpp

Author: BBuf

speed_rgb2yuv_sse.cpp

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <opencv2/opencv.hpp>
+using namespace std;
+using namespace cv;
+
+void RGBToYUV(unsigned char *RGB, unsigned char *Y, unsigned char *U, unsigned char *V, int Width, int Height, int Stride)
+{
+	const int Shift = 15;
+	const int HalfV = 1 << (Shift - 1);
+	const int Y_B_WT = 0.114f * (1 << Shift), Y_G_WT = 0.587f * (1 << Shift), Y_R_WT = (1 << Shift) - Y_B_WT - Y_G_WT;
+	const int U_B_WT = 0.436f * (1 << Shift), U_G_WT = -0.28886f * (1 << Shift), U_R_WT = -(U_B_WT + U_G_WT);
+	const int V_B_WT = -0.10001 * (1 << Shift), V_G_WT = -0.51499f * (1 << Shift), V_R_WT = -(V_B_WT + V_G_WT);
+	for (int YY = 0; YY < Height; YY++)
+	{
+		unsigned char *LinePS = RGB + YY * Stride;
+		unsigned char *LinePY = Y + YY * Width;
+		unsigned char *LinePU = U + YY * Width;
+		unsigned char *LinePV = V + YY * Width;
+		for (int XX = 0; XX < Width; XX++, LinePS += 3)
+		{
+			int Blue = LinePS[0], Green = LinePS[1], Red = LinePS[2];
+			LinePY[XX] = (Y_B_WT * Blue + Y_G_WT * Green + Y_R_WT * Red + HalfV) >> Shift;
+			LinePU[XX] = ((U_B_WT * Blue + U_G_WT * Green + U_R_WT * Red + HalfV) >> Shift) + 128;
+			LinePV[XX] = ((V_B_WT * Blue + V_G_WT * Green + V_R_WT * Red + HalfV) >> Shift) + 128;
+		}
+	}
+}
+
+int main() {
+
+}