public void Stop()
{
if (AudioMeter == null)
{
Logger.Log("Attempted to Stop an already stopped AudioMeterEvent");
return;
}
AudioMeter audioMeter;
KeepaliveTimers keepaliveTimers;
lock (Mutex)
{
audioMeter = AudioMeter;
AudioMeter = null;
Logger.Log("Stopped audio meter monitoring");
if (CurrentKeepaliveTimers != null)
{
EventQueue.EnqueueEvent(() => { StoppedSounding(this, System.EventArgs.Empty); });
}
keepaliveTimers = CurrentKeepaliveTimers;
CurrentKeepaliveTimers = null;
}
audioMeter.Dispose();
if (keepaliveTimers != null)
{
keepaliveTimers.Dispose();
}
}
void AudioMeter_SoundDetected(object sender, AudioMeter.SoundDetectedEventArgs eventArgs)
{
bool initial;
var keepaliveTimers = new KeepaliveTimers(KeepaliveInterval, KeepaliveDuration);
lock (Mutex)
{
if (sender != AudioMeter)
{
return; // Don't race against Stop()
}
initial = CurrentKeepaliveTimers == null;
if (!initial)
{
keepaliveTimers = CurrentKeepaliveTimers;
}
else
{
Logger.Log("Sounding (initial, " + eventArgs.PeakLevel + ")");
EventQueue.EnqueueEvent(() => { Sounding(this, System.EventArgs.Empty); });
CurrentKeepaliveTimers = keepaliveTimers;
}
}
if (!initial)
{
keepaliveTimers.ResetDuration();
return;
}
keepaliveTimers.IntervalElapsed += KeepaliveTimers_IntervalElapsed;
keepaliveTimers.DurationElapsed += KeepaliveTimers_DurationElapsed;
keepaliveTimers.Start();
}
void KeepaliveTimers_DurationElapsed(object sender, System.Timers.ElapsedEventArgs e)
{
KeepaliveTimers keepaliveTimers;
lock (Mutex)
{
if (sender != CurrentKeepaliveTimers)
{
return;
}
keepaliveTimers = CurrentKeepaliveTimers;
CurrentKeepaliveTimers = null;
Logger.Log("Expiry");
EventQueue.EnqueueEvent(() => { StoppedSounding(this, System.EventArgs.Empty); });
}
keepaliveTimers.Dispose();
}