public long RunMeasurementRoutine()
{
Console.WriteLine($"We will take {c_sampleCount} samples to calculate the end-to-end system latency.");
Console.WriteLine("Setting up audio devices...");
InterceptKeys.Instance.OnKey += OnKey;
InterceptKeys.Start();
Thread.Sleep(1000);
_capture.Initialize();
_capture.DataAvailable += OnData;
_tracker.Start();
_capture.Start();
_output.Initialize(new SampleToIeeeFloat32(new MetronomeGenerator()));
_output.Play();
_done.WaitOne();
float delta = 0;
for (int i = 0; i < c_sampleCount; i++)
{
delta += _keyTicks[i] - _audioTicks[i];
}
delta /= c_sampleCount;
Console.WriteLine($"End-to-end latency: {delta / 10000}ms");
Thread.Sleep(5000);
return((long)(delta));
}
public void Run()
{
_periodicThread = new Thread(PeriodicCancelThread);
_periodicThread.Start();
_tracker.Start();
_capture.Start();
InterceptKeys.Instance.OnKey += OnKey;
InterceptKeys.Start();
}
void OnKey(object sender, InterceptKeys.KeyOfInterest e)
{
_keyTicks.Add(_tracker.CurrentTime);
if (_audioTicks.Count == _keyTicks.Count) {
Console.WriteLine($"offset {(_keyTicks.Last()- _audioTicks.Last()) / 10000 }ms");
if (_audioTicks.Count >= c_sampleCount) {
_capture.Stop();
InterceptKeys.Stop();
_output.Stop();
_capture.Dispose();
_output.Dispose();
_done.Set();
}
}
}
void OnKey(object sender, InterceptKeys.KeyOfInterest e)
{
_keyTicks.Add(_tracker.CurrentTime);
if (_audioTicks.Count == _keyTicks.Count)
{
Console.WriteLine($"offset {(_keyTicks.Last()- _audioTicks.Last()) / 10000 }ms");
if (_audioTicks.Count >= c_sampleCount)
{
_capture.Stop();
InterceptKeys.Stop();
_output.Stop();
_capture.Dispose();
_output.Dispose();
_done.Set();
}
}
}
private void OnKey(object sender, InterceptKeys.KeyOfInterest e)
{
if (e == InterceptKeys.KeyOfInterest.BeatKey) OnBeatKey();
if (e == InterceptKeys.KeyOfInterest.EndKey) OnEndKey();
}