func: static int decode_unregistered_user_data(H264SEIUnregistered *h, GetBitContext *gb,
  
                                           void *logctx, int size)
  
  {
  
      uint8_t *user_data;
  
      int e, build, i;
  
  
  
      if (size < 16 || size >= INT_MAX - 16)
  
          return AVERROR_INVALIDDATA;
  
  
  
      user_data = av_malloc(16 + size + 1);
  
      if (!user_data)
  
          return AVERROR(ENOMEM);
  
  
  
      for (i = 0; i < size + 16; i++)
  
          user_data[i] = get_bits(gb, 8);
  
  
  
      user_data[i] = 0;
  
      e = sscanf(user_data + 16, "x264 - core %d", &build);
  
      if (e == 1 && build > 0)
  
          h->x264_build = build;
  
      if (e == 1 && build == 1 && !strncmp(user_data+16, "x264 - core 0000", 16))
  
          h->x264_build = 67;
  
  
  
      if (strlen(user_data + 16) > 0)
  
          av_log(logctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data + 16);
  
  
  
      av_free(user_data);
  
      return 0;
  
  }
  