static void create_default_qtables(uint8_t *qtables, uint8_t q)

{

    int factor = q;

    int i;



    factor = av_clip(q, 1, 99);



    if (q < 50)

        q = 5000 / factor;

    else

        q = 200 - factor * 2;



    for (i = 0; i < 128; i++) {

        int val = (default_quantizers[i] * q + 50) / 100;



        /* Limit the quantizers to 1 <= q <= 255. */

        val = av_clip(val, 1, 255);

        qtables[i] = val;

    }

}
