写数据到文件（调试用）

只保存 16 个打开的文件句柄，所以只是调试时存文件用的：

static int temp_save_file(char *filename, u8 *data, int len, int need_stop)
{
  static char filename_list[16][256] = {0};
  static int opened_file_fds[sizeof(filename_list)/sizeof(filename_list[0])] = {-1};
  int isFileOpened = -1;
  for (int i = 0; i < sizeof(filename_list)/sizeof(filename_list[0]); i++)
  {
    if (0 == strcmp(filename_list[i], filename))
    {
      isFileOpened = i;
      break;
    }
  }

  if (need_stop)
  {
    if (isFileOpened!= -1)
    {
      printf("[snippet] remove fd %d filename %s\n",
        opened_file_fds[isFileOpened], filename_list[isFileOpened]);
      close(opened_file_fds[isFileOpened]);
      filename_list[isFileOpened][0] = '\0';
      opened_file_fds[isFileOpened] = -1;
    }
    return 0;
  }

  // 如果文件已经打开，直接使用已打开的文件描述符进行写入操作
  if (isFileOpened!= -1)
  {
    int fd = opened_file_fds[isFileOpened];
    ssize_t written = write(fd, data, len);
    if (written!= len)
    {
      printf("[snippet] write error\n");
      return -1;
    }
    return 0;
  }

  // 检查是否还有空位置
  int freeIndex = -1;
  for (int i = 0; i < sizeof(filename_list)/sizeof(filename_list[0]); i++)
  {
    if (strlen(filename_list[i]) == 0)
    {
      freeIndex = i;
      break;
    }
  }

  if (freeIndex == -1)
  {
    printf("[snippet] no free space\n");
    return -1;
  }

  // 存储文件描述符和文件名
  int fp = open(filename, O_APPEND | O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR);
  if (fp == -1)
  {
    return -1;
  }
  printf("[snippet] add fd %d filename %s\n", fp, filename);
  opened_file_fds[freeIndex] = fp;
  strncpy(filename_list[freeIndex], filename, 255);

  // 写入数据
  ssize_t written = write(fp, data, len);
  if (written!= len)
  {
    printf("[snippet] write error\n");
    return -1;
  }
  return 0;
}

使用方法：

temp_save_file("/var/rec/c1/radioA.raw", audio_frame.data, audio_frame.len, !global_enable_save_audio);
handle(audio_frame);
temp_save_file("/var/rec/c1/radioB.raw", audio_frame.data, audio_frame.len, !global_enable_save_audio);