static int dvbsub_probe(AVProbeData *p)

{

    int i, j, k;

    const uint8_t *end = p->buf + p->buf_size;

    int type, len;

    int max_score = 0;



    for(i=0; i<p->buf_size; i++){

        if (p->buf[i] == 0x0f) {

            const uint8_t *ptr = p->buf + i;

            uint8_t histogram[6] = {0};

            int min = 255;

            for(j=0; ptr + 6 < end; j++) {

                if (*ptr != 0x0f)

                    break;

                type    = ptr[1];

                //page_id = AV_RB16(ptr + 2);

                len     = AV_RB16(ptr + 4);

                if (type == 0x80) {

                    ;

                } else if (type >= 0x10 && type <= 0x14) {

                    histogram[type - 0x10] ++;

                } else

                    break;

                ptr += 6 + len;

            }

            for (k=0; k < 4; k++) {

                min = FFMIN(min, histogram[k]);

            }

            if (min && j > max_score)

                max_score = j;

        }

    }



    if (max_score > 5)

        return AVPROBE_SCORE_EXTENSION;



    return 0;

}
