YUVtoRGB

void ConvertYUVtoRGB(unsigned char *y,unsigned char *u,unsigned char *v,unsigned char *out,int w)

{

int i,iTempR,iTempG,iTempB,iTempY,iTempU,iTempV;

for(i=0;i

{

iTempY=y[i];

//读取UV分量，在水平方向每2个象素点共用1组UV

iTempU=u[i>>1]-128;

iTempV=v[i>>1]-128;

//YUV->RGB

iTempR=(short)(iTempY+1.375*iTempV);

iTempG=(short)(iTempY-0.34375*iTempU-0.703125*iTempV);

iTempB=(short)(iTempY+1.734375*iTempU);

//输出,每个分量的范围要保证在0-255之间

out[i*3+0]=max(0,min(255,iTempB));

out[i*3+1]=max(0,min(255,iTempG));

out[i*3+2]=max(0,min(255,iTempR));

}

}

void YUV420toRGB24(unsigned char *pBuf,unsigned char *pRgb,UINT uiW,UINT uiH)

{

unsigned char * pYUV420Y,*pYUV420U,*pYUV420V,*pLineY,*pLineU,*pLineV,*pLineBmp;

// 420->rgb24

pYUV420Y = pBuf; //Y分量，水平：w 垂直：h

pYUV420U = pBuf + uiW*uiH; //U分量，水平：w/2 垂直：h

pYUV420V = pBuf + uiW*uiH +uiW*uiH/4; //V分量，水平：w/2 垂直：h

for (int i =0; i<(int)uiH; i++)

{

pLineY = pYUV420Y+i*uiW; //当前行的Y输入

pLineU = pYUV420U+(i/2)*(uiW/2); //当前行的U输入

pLineV = pYUV420V+(i/2)*(uiW/2); //当前行的V输入

//当前行的输入，在BMP图像中，图像在垂直方向上，需要至下而上反向排列，所以要从后向前输出BMP数据

pLineBmp = pRgb + (long int)uiW*(uiH-i-1)*3;

ConvertYUVtoRGB(pLineY, pLineU, pLineV, pLineBmp, uiW);

}

}

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