func: static int voc_probe(AVProbeData *p)
  
  {
  
      int version, check;
  
  
  
      if (p->buf_size < 26)
  
          return 0;
  
      if (memcmp(p->buf, voc_magic, sizeof(voc_magic) - 1))
  
          return 0;
  
      version = p->buf[22] | (p->buf[23] << 8);
  
      check = p->buf[24] | (p->buf[25] << 8);
  
      if (~version + 0x1234 != check)
  
          return 10;
  
  
  
      return AVPROBE_SCORE_MAX;
  
  }
  