get_bits(&s->gb, 3);
unk= get_bits(&s->gb, 3);	  s->h263_long_vectors =  s->mb_num<100;
static int rv10_decode_picture_header(MpegEncContext *s){    int mb_count, pb_frame, marker, h, full_frame;        /* skip packet header */    h = get_bits(&s->gb, 8);    if ((h & 0xc0) == 0xc0) {        int len, pos;        full_frame = 1;        len = get_num(&s->gb);        pos = get_num(&s->gb);    } else {        int seq, frame_size, pos;        full_frame = 0;        seq = get_bits(&s->gb, 8);        frame_size = get_num(&s->gb);        pos = get_num(&s->gb);    }    /* picture number */    get_bits(&s->gb, 8);    marker = get_bits(&s->gb, 1);    if (get_bits(&s->gb, 1))        s->pict_type = P_TYPE;    else        s->pict_type = I_TYPE;    pb_frame = get_bits(&s->gb, 1);#ifdef DEBUG    printf("pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);#endif        if (pb_frame)        return -1;    s->qscale = get_bits(&s->gb, 5);    if(s->qscale==0){        fprintf(stderr, "error, qscale:0\n");        return -1;    }    if (s->pict_type == I_TYPE) {        if (s->rv10_version == 3) {            /* specific MPEG like DC coding not used */            s->last_dc[0] = get_bits(&s->gb, 8);            s->last_dc[1] = get_bits(&s->gb, 8);            s->last_dc[2] = get_bits(&s->gb, 8);#ifdef DEBUG            printf("DC:%d %d %d\n",                   s->last_dc[0],                   s->last_dc[1],                   s->last_dc[2]);#endif        }    }    /* if multiple packets per frame are sent, the position at which       to display the macro blocks is coded here */    if (!full_frame) {        s->mb_x = get_bits(&s->gb, 6);	/* mb_x */        s->mb_y = get_bits(&s->gb, 6);	/* mb_y */        mb_count = get_bits(&s->gb, 12);    } else {        s->mb_x = 0;        s->mb_y = 0;        mb_count = s->mb_width * s->mb_height;    }//printf("%d\n", get_bits(&s->gb, 3));    get_bits(&s->gb, 3);	/* ignored */    s->f_code = 1;    s->unrestricted_mv = 1;#if 0    s->h263_long_vectors = 1;#endif    return mb_count;}