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[RUFFY (Gast)]

static void _init_sarray_imcu_row(JSAMPIMAGE *image,JSAMPLE *src,uint32_t y_pos,uint32_t width,uint32_t rows)
{
    JSAMPLE *r0;
    JSAMPLE *r1;
    JSAMPARRAY ay = (*image)[0];
    JSAMPARRAY au = (*image)[1];
    JSAMPARRAY av = (*image)[2];
    JSAMPROW ry0,ru,rv,ry1;    
    
    int i,j;
    for( i = 0; i < rows/2 ;i++)
    {
        r0 = & src[ (i * 2 + y_pos) * width * 2];
        r1 = & src[ (i * 2 + y_pos + 1) * width * 2];
        
        ry0 = ay[i*2];
        ry1 = ay[i*2+1];
        
        ru = au[i];
        rv = av[i];
        
        for(j = 0; j < width /2; j++)
        {
            ry0[j * 2] = r0[j*4];
            ry1[j * 2] = r1[j*4];
            ry0[j * 2 + 1] = r0[j*4+2];
            ry1[j * 2 +1] = r1[j*4+2];
            
            ru[j] = (r0[ j * 4 + 1] + r1[j*4+1])/2;
            rv[j] = (r0[ j * 4 + 3] + r1[j*4+3])/2;
            
        }
        
        
    }
}

[Michael (Gast)]

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[Krapao (Gast)]

/**
  * \brief initial mcu rows with yuv420 data
  * \param image pointer to mcu row
  * \param src pointer of source with yuv422 format
  * \param y_pos the start position of the mcu rows in a whole image
  * \param width width of the image
  * \param rows total number of concerned rows in the mcu
  */