teardown method

Future<void> teardown(
  1. bool isFinal
)

断开媒体、停止心跳和续期；通话已结束（或 isFinal）的句柄结束：快照不再变化。

Implementation

Future<void> teardown(bool isFinal) async {
  final hadSession = _session != null;
  _unbindSession();
  _heartbeat?.call();
  _heartbeat = null;
  _renewTimer?.cancel();
  _renewTimer = null;
  _ringTimer?.cancel();
  _ringTimer = null;
  if (hadSession) {
    _holding = false;
    _set(media: 'disconnected', local: const CallLocalMedia(), remote: const []);
    _module.reportHolder(callId, false);
  }
  if ((isFinal || snapshot.call.status == 'ended') && !_ended) {
    _set(ringing: false);
    _ended = true;
    _holding = false;
    _releaseHold?.call();
    _releaseHold = null;
    _module.noteCurrent(callId, false);
    _module.forget(this);
    unawaited(_tracks.close());
    unawaited(_data.close());
  }
}