onStart method

@override void onStart(AliPlayerWidgetController controller)

策略启动，订阅感兴趣的状态变化

Called when the strategy is started. Subscribe to notifiers here.

controller The player widget controller providing state access.

Implementation

@override
void onStart(AliPlayerWidgetController controller) {
  // 监听播放状态
  listen<int>(controller.playStateNotifier, (state) {
    final wasPlaying = _isPlaying;
    _isPlaying = (state == FlutterAvpdef.started);

    if (_isPlaying && !wasPlaying) {
      // 进入播放状态，开始计时
      _playStartTimestamp = DateTime.now().millisecondsSinceEpoch;
    } else if (!_isPlaying && wasPlaying) {
      // 离开播放状态，累计有效播放时长
      _accumulatePlayDuration();
    }
  });

  // 监听加载状态
  listen<bool>(controller.isLoadingStateNotifier, (isLoading) {
    if (isLoading && !_isLoading) {
      // 进入 loading
      _isLoading = true;
      _loadingStartTimestamp = DateTime.now().millisecondsSinceEpoch;

      // 暂停有效播放计时
      if (_isPlaying) {
        _accumulatePlayDuration();
      }
    } else if (!isLoading && _isLoading) {
      // 结束 loading
      _isLoading = false;
      final loadingDuration = Duration(
        milliseconds:
            DateTime.now().millisecondsSinceEpoch - _loadingStartTimestamp,
      );

      // 判断是否为有效卡顿
      if (_isPlaying && loadingDuration >= stutterThreshold) {
        _stutterCount++;
        _totalStutterMs += loadingDuration.inMilliseconds;

        final info = _buildStutterInfo();
        logi('Stutter detected: $info', tag: name);
        onStutterDetected?.call(info);
      }

      // 恢复有效播放计时
      if (_isPlaying) {
        _playStartTimestamp = DateTime.now().millisecondsSinceEpoch;
      }
    }
  });
}