yuv422與yuv420轉(zhuǎn)換成RGB來顯示

海漩渦 2016-06-22

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const int w = m_dwWidth, h = m_dwHeight;
       BYTE * const p = (BYTE *)ddsd.lpSurface;
       if (p == NULL) {
           m_MonDDrawList[i].pddsBackBuffer->Unlock(NULL);
           continue;
       }
       DDPIXELFORMAT ddpf = ddsd.ddpfPixelFormat;
       const int stride = ddsd.lPitch;

       //char *s = new char[2048*1536*5];
       //char peric[1024] = {0};
       //sprintf(peric,"pY:%u\n", (const char*)pFrame->pY);
       //OutputDebugString(peric);
#if 0
        /* yuv420 轉(zhuǎn)RGB */
       int j = 0;
       int stride_uv;
       int c, d, e;
       unsigned char* cur;
       BYTE *line = (BYTE *)ddsd.lpSurface;
       int width = m_dwWidth, height = m_dwHeight, t_width;
       unsigned char* y = pFrame->pY;
       unsigned char* u = pFrame->pU;
       unsigned char* v = pFrame->pV;

       stride_uv = (width+1)>>1;

       for( j = 0 ; j < height ; j++ ){
           cur = line;
           for( i = 0 ; i < width ; i++ ){
               c = y[j*width+i] - 16;
               d = u[j*stride_uv+(i>>1)] - 128;
               e = v[j*stride_uv+(i>>1)] - 128;

               (*cur) = clip(( 298 * c           + 409 * e + 128) >> 8);cur++;
               (*cur) = clip(( 298 * c - 100 * d - 208 * e + 128) >> 8);cur++;
               (*cur) = clip(( 298 * c + 516 * d           + 128) >> 8);cur+=2;
           }
           line += t_width<<2;
       }
#else

        /* yuv422 轉(zhuǎn)RGB */
       int j = 0;
       for(j = 0;j < h;j ++)
       {
           //memcpy(s + j * stride,(char*)pFrame->pY + j * w, w);
           memcpy(p + j * stride,(char*)pFrame->pY + j * w, w);
           //memmove(p + j * stride,(char*)pFrame->pY + j * w, w);
       }

       for(j = 0;j < h/2;j++)
       {
           //memcpy(s + stride * h + j * stride / 2, (char*)pFrame->pV + j * w / 2, w / 2);
           memcpy(p + stride * h + j * stride / 2, (char*)pFrame->pV + j * w / 2, w / 2);
           //memmove(p + stride * h + j * stride / 2, (char*)pFrame->pV + j * w / 2, w / 2);
       }

       for(j = 0;j < h/2;j ++)
       {
           //memcpy(s + stride * h + stride * h / 4 + j* stride / 2, (char*)pFrame->pU + j * w / 2, w / 2);
           memcpy(p + stride * h + stride * h / 4 + j* stride / 2, (char*)pFrame->pU + j * w / 2, w / 2);
           //memmove(p + stride * h + stride * h / 4 + j* stride / 2, (char*)pFrame->pU + j * w / 2, w / 2);
       }
#endif

===================================================================

//m_pYUV2RGBFun(pFrame->pY, pFrame->uYStride, pFrame->pU, pFrame->pV, pFrame->uUVStride,
        //    (UCHAR *)ddsd.lpSurface, pFrame->uWidth, pFrame->uHeight, ddsd.lPitch);

        const int w = m_dwWidth, h = m_dwHeight;
        BYTE * p = (BYTE *)ddsd.lpSurface;
        if (p == NULL) {
            m_MonDDrawList[i].pddsBackBuffer->Unlock(NULL);
            continue;
        }
        DDPIXELFORMAT ddpf = ddsd.ddpfPixelFormat;
        const int stride = ddsd.lPitch;
        int j = 0;

        if(pFrame->uReserved == 1)
        {// yuv422
            for(j = 0;j < h*w*2;j ++)
            {
                *p++=*pFrame->pU++;
                *p++=*pFrame->pY++;
                *p++=*pFrame->pV++;
                *p++=*pFrame->pY++;
            }
        }

        else
        {
            // yuv420
            for(j = 0;j < h;j ++)
            {
                memcpy(p + j * stride,(char*)pFrame->pY + j * w, w);
            }


            for(j = 0;j < h/2;j++)
            {
               memcpy(p + stride * h + j * stride / 2,    (char*)pFrame->pV + j * w / 2, w / 2);
            }

            for(j = 0;j < h/2;j ++)
            {
                memcpy(p + stride * h + stride * h / 4 + j* stride / 2, (char*)pFrame->pU + j * w / 2, w / 2);
            }
        }