C++ 海康 YV12转RGB32，YV420转RGB32

来源：互联网发布：数据分析统计表编辑：程序博客网时间：2024/06/04 20:09

bool YV12_to_RGB32(unsigned char* pYV12, unsigned char* pRGB32, int iWidth, int iHeight){    if (!pYV12 || !pRGB32)        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 = pYV12 + iWidth*iHeight + (iHeight / 2)*(iWidth / 2);//&vData[nYLen >> 2];    unsigned char* uData = pYV12 + iWidth*iHeight;// &yData[nYLen];    if (!uData || !vData)        return false;    int rgb[4];    int jCol, iRow;    for (iRow = 0; iRow < iHeight; iRow++)    {        for (jCol = 0; jCol < iWidth; jCol++)        {            rgb[3] = 1;            int Y = yData[iRow*iWidth + jCol];            int U = uData[(iRow / 2)*(iWidth / 2) + (jCol / 2)];            int V = vData[(iRow / 2)*(iWidth / 2) + (jCol / 2)];            int R = Y + (U - 128) + (((U - 128) * 103) >> 8);            int G = Y - (((V - 128) * 88) >> 8) - (((U - 128) * 183) >> 8);            int B = Y + (V - 128) + (((V - 128) * 198) >> 8);            // r分量值             R = R<0 ? 0 : R;            rgb[2] = R > 255 ? 255 : R;            // g分量值            G = G<0 ? 0 : G;            rgb[1] = G>255 ? 255 : G;            // b分量值             B = B<0 ? 0 : B;            rgb[0] = B>255 ? 255 : B;            pRGB32[4 * (iRow*iWidth + jCol) + 0] = rgb[0];            pRGB32[4 * (iRow*iWidth + jCol) + 1] = rgb[1];            pRGB32[4 * (iRow*iWidth + jCol) + 2] = rgb[2];            pRGB32[4 * (iRow*iWidth + jCol) + 3] = rgb[3];        }    }    return true;}

如果是YV420转RGB32，只要把

unsigned char* vData = pYV12 + iWidth*iHeight + (iHeight / 2)*(iWidth / 2);unsigned char* uData = pYV12 + iWidth*iHeight;// &yData[nYLen];

改成

unsigned char* vData = pYV12 + iWidth*iHeight;unsigned char* uData = pYV12 + iWidth*iHeight + (iHeight / 2)*(iWidth / 2);

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