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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;

        }

    }

}