private void TimerCallback(object state)
{
if (this.timer == null || this.processingTimer)
{
return;
}
lock (this)
{
this.processingTimer = true;
try
{
UMCallState callState = this.stateProvider.GetCallState(this.callId);
if (this.previousState == null || this.previousState.Value != callState)
{
PlayOnPhoneNotificationPayload playOnPhoneNotificationPayload = new PlayOnPhoneNotificationPayload(callState.ToString());
playOnPhoneNotificationPayload.SubscriptionId = this.subscriptionId;
playOnPhoneNotificationPayload.Source = new TypeLocation(base.GetType());
this.notifier.NotifyStateChange(playOnPhoneNotificationPayload);
this.previousState = new UMCallState?(callState);
}
if (callState == UMCallState.Disconnected)
{
this.timer.Dispose();
this.timer = null;
this.subscriptionId = null;
this.callId = null;
this.previousState = null;
}
}
finally
{
this.processingTimer = false;
}
}
}
internal virtual void NotifyStateChange(PlayOnPhoneNotificationPayload payload)
{
lock (this)
{
this.payloadList.Add(payload);
base.FireDataAvailableEvent();
}
}