//平面YUV422轉(zhuǎn)平面RGB24
static void YUV422p_to_RGB24(unsigned char *yuv422[3], unsigned char *rgb24, int width, int height)
{
?int R,G,B,Y,U,V;
?int x,y;
?int nWidth = width>>1; //色度信號(hào)寬度
?for (y=0;y<height;y++)
?{
? for (x=0;x<width;x++)
? {
?? Y = *(yuv422[0] + y*width + x);
?? U = *(yuv422[1] + y*nWidth + (x>>1));
?? V = *(yuv422[2] + y*nWidth + (x>>1));
?? R = Y + 1.402*(V-128);
?? G = Y - 0.34414*(U-128) - 0.71414*(V-128);
?? B = Y + 1.772*(U-128);
??
?? //防止越界
?? if (R>255)R=255;
?? if (R<0)R=0;
?? if (G>255)G=255;
?? if (G<0)G=0;
?? if (B>255)B=255;
?? if (B<0)B=0;
??
?? *(rgb24 + ((height-y-1)*width + x)*3) = B;
?? *(rgb24 + ((height-y-1)*width + x)*3 + 1) = G;
?? *(rgb24 + ((height-y-1)*width + x)*3 + 2) = R;?
? }
?}
}

//平面YUV420轉(zhuǎn)平面YUV422
static void YUV420p_to_YUV422p(unsigned char *yuv420[3], unsigned char *yuv422, int width, int height)?
{
?int x, y;
?//亮度信號(hào)Y復(fù)制
?int Ylen = width*height;
?memcpy(yuv422, yuv420[0], Ylen);
?//色度信號(hào)U復(fù)制
?unsigned char *pU422 = yuv422 + Ylen; //指向U的位置
?int Uwidth = width>>1; //422色度信號(hào)U寬度
?int Uheight = height>>1; //422色度信號(hào)U高度
?for (y = 0; y < Uheight; y++)
?{????????
? memcpy(pU422 + y*width,????????? yuv420[1] + y*Uwidth, Uwidth);
? memcpy(pU422 + y*width + Uwidth, yuv420[1] + y*Uwidth, Uwidth);
?}
?//色度信號(hào)V復(fù)制
?unsigned char *pV422 = yuv422 + Ylen + (Ylen>>1); //指向V的位置
?int Vwidth = Uwidth; //422色度信號(hào)V寬度
?int Vheight = Uheight; //422色度信號(hào)U寬度
?for (y = 0; y < Vheight; y++)
?{?
? memcpy(pV422 + y*width,????????? yuv420[2] + y*Vwidth, Vwidth);
? memcpy(pV422 + y*width + Vwidth, yuv420[2] + y*Vwidth, Vwidth);
?}
}

//平面YUV420轉(zhuǎn)RGB24
static void YUV420p_to_RGB24(unsigned char *yuv420[3], unsigned char *rgb24, int width, int height)
{
//? int begin = GetTickCount();
?int R,G,B,Y,U,V;
?int x,y;
?int nWidth = width>>1; //色度信號(hào)寬度
?for (y=0;y<height;y++)
?{
? for (x=0;x<width;x++)
? {
?? Y = *(yuv420[0] + y*width + x);
?? U = *(yuv420[1] + ((y>>1)*nWidth) + (x>>1));
?? V = *(yuv420[2] + ((y>>1)*nWidth) + (x>>1));
?? R = Y + 1.402*(V-128);
?? G = Y - 0.34414*(U-128) - 0.71414*(V-128);
?? B = Y + 1.772*(U-128);

?? //防止越界
?? if (R>255)R=255;
?? if (R<0)R=0;
?? if (G>255)G=255;
?? if (G<0)G=0;
?? if (B>255)B=255;
?? if (B<0)B=0;
??
?? *(rgb24 + ((height-y-1)*width + x)*3) = B;
?? *(rgb24 + ((height-y-1)*width + x)*3 + 1) = G;
?? *(rgb24 + ((height-y-1)*width + x)*3 + 2) = R;
//??? *(rgb24 + (y*width + x)*3) = B;
//??? *(rgb24 + (y*width + x)*3 + 1) = G;
//??? *(rgb24 + (y*width + x)*3 + 2) = R;??
? }
?}
}

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