static void vc1_inv_trans_4x4_dc_c(uint8_t *dest, int linesize, DCTELEM *block)
{
    int i;
    int dc = block[0];
    const uint8_t *cm;
    dc = (17 * dc +  4) >> 3;
    dc = (17 * dc + 64) >> 7;
    cm = ff_cropTbl + MAX_NEG_CROP + dc;
    for(i = 0; i < 4; i++){
        dest[0] = cm[dest[0]];
        dest[1] = cm[dest[1]];
        dest[2] = cm[dest[2]];
        dest[3] = cm[dest[3]];
        dest += linesize;
    }
}