bool YV12_to_RGB24(unsigned char* pYV12, unsigned char* pRGB24, int iWidth, int iHeight)
{
if(!pYV12 || !pRGB24)
return false;
const long nYLen = long(iHeight * iWidth);
const int nHfWidth = (iWidth>>1);
if(nYLen < 1 || nHfWidth < 1)
return false;
unsigned char* yData = pYV12;
unsigned char* vData = &yData[nYLen];
unsigned char* uData = &vData[nYLen>>2];
if(!uData || !vData)
return false;
int rgb[3];
int i, j, m, n, x, y;
m = -iWidth;
n = -nHfWidth;
for(y = 0; y < iHeight; y++)
{
m += iWidth;
if(!(y % 2))
n += nHfWidth;
for(x=0; x < iWidth; x++)
{
i = m + x;
j = n + (x>>1);
rgb[2] = int(yData[i] + 1.370705 * (vData[j] - 128)); // r分量值
rgb[1] = int(yData[i] - 0.698001 * (uData[j] - 128) - 0.703125 * (vData[j] - 128)); // g分量值
rgb[0] = int(yData[i] + 1.732446 * (uData[j] - 128)); // b分量值
j = nYLen - iWidth - m + x;
i = (j<<1) + j;
for(j=0;
yuv420 yv12 与RGB转换算法
最新推荐文章于 2020-06-01 16:34:34 发布