/// 打印日志的级别
  final P2pLogLevel logLevel;

  /// 通过webRTCConfig来修改WebRTC默认配置
  final Map<String, dynamic> webRTCConfig;

  /// 信令服务器地址
  final String wsSignalerAddr;

  /// tracker服务器地址
  final String announce;

  /// 点播模式下P2P在磁盘缓存的最大数据量(设为0可以禁用磁盘缓存)
  final int diskCacheLimit;

  /// P2P在内存缓存的最大数据量，用ts文件个数表示，仅安卓有效
  final int memoryCacheCountLimit;
  // @Deprecated('Use memoryCacheCountLimit now')
  // 仅iOS有效
  final int memoryCacheLimit;

  /// 开启或关闭p2p engine
  final bool p2pEnabled;

  /// HTTP下载ts文件超时时间
  final Duration downloadTimeout;

  /// datachannel下载二进制数据的最大超时时间
  final Duration dcDownloadTimeout;

  /// 用户自定义的标签，可以在控制台查看分布图
  final String tag;

  /// 本地代理服务器的端口号
  final int localPort;

  /// 最大连接节点数量
  final int maxPeerConnections;

  /// 在可能的情况下使用Http Range请求来补足p2p下载超时的剩余部分数据
  final bool useHttpRange;

  /// 是否只在wifi和有线网络模式上传数据（建议在云端设置）
  final bool wifiOnly;

  /// 设置请求ts和m3u8时的HTTP请求头
  final Map<String, String> httpHeaders;

  /// 如果使用自定义的channelId，则此字段必须设置，且长度必须在5到15个字符之间，建议设置成你所在组织的唯一标识
  final String channelIdPrefix;

  /// 如果运行于机顶盒请设置成true
  final bool isSetTopBox;

  P2pConfig({
    this.logLevel: P2pLogLevel.warn,
    this.webRTCConfig: const {}, // TODO: 默认值缺少
    this.wsSignalerAddr: 'wss://signal.cdnbye.com',
    this.announce: 'https://tracker.cdnbye.com/v1',
    this.diskCacheLimit: 1024 * 1024 * 1024,
    this.memoryCacheLimit: 60 * 1024 * 1024,
    this.memoryCacheCountLimit: 30,
    this.p2pEnabled: true,
    this.downloadTimeout: const Duration(seconds: 10),
    this.dcDownloadTimeout: const Duration(seconds: 4),
    this.tag: "flutter",
    this.localPort: 52019,
    this.maxPeerConnections: 10,
    this.useHttpRange: true,
    this.wifiOnly: false,
    this.httpHeaders,
    this.channelIdPrefix: "cdnbye",
    this.isSetTopBox: false,
  });

// 初始化
Cdnbye.init(
  'ZMuO5qHZg', // replace with your token
  config: P2pConfig(
    logLevel: P2pLogLevel.debug,
  ),
  infoListener: _listen,
  segmentIdGenerator: (level, sn, url) {
    // TODO: segmentIdGenerator
    return url;
  },
);

String url = await Cdnbye.parseStreamURL(oldUrl);

/// The version of SDK. SDK的版本号
static Future<String> get platformVersion 

/// Create a new instance with token and the specified config.
static Future<int> init(
  token, {
  P2pConfig config,
  CdnByeInfoListener infoListener,
  String Function(int level, int sn, String url) segmentIdGenerator,
})

/// Get parsed local stream url by passing the original stream url(m3u8) to CBP2pEngine instance.
static Future<String> parseStreamURL(
  String sourceUrl, [
  String videoId,
])

/// Get the connection state of p2p engine. 获取P2P Engine的连接状态
static Future<bool> isConnected()

/// Restart p2p engine.
static Future restartP2p()

/// Stop p2p and free used resources.
static Future stopP2p()

/// Get the peer ID of p2p engine. 获取P2P Engine的peer ID
static Future<String> getPeerId()

// 根据url构造ChannelId
String channelId = oldUrl.split('/').last;
String url = await Cdnbye.parseStreamURL(oldUrl,channelId);

// 初始化
Cdnbye.init(
  'ZMuO5qHZg', // replace with your token
  segmentIdGenerator: (level, sn, url) {
    // TODO: return your segmentId
    return url;
  },
);

P2pConfig(
  httpHeaders: {
    "referer": "XXX",
    "User-Agent": "XXX",
  }
)