/// <summary>
/// Combines the people tracking and speaker balancing.
/// It first processes the next camera frames and receives the coordinates of the detected people.
/// Afterwards, the speaker will be balanced.
/// It also updates the UI Windows and triggers new result events.
/// </summary>
private void DoWork()
{
WorkerResult result = new WorkerResult(cameras.Keys.Count);
Point coordinates = new Point(0, 0);
bool applyCoordinates = true;
// process all cameras
for (int i = 0; i < cameras.Keys.Count; i++)
{
Image image = cameras.Keys.ElementAt(i);
Camera camera = cameras[image];
// process next frame and detect people/coordinates if needed
camera.Process(isBalancing || isCalibrating);
result.SetFrame(i, camera.GetFrame());
Point?cameraCoordinates = camera.GetCoordinates(i % 2 == 0 ? Orientation.Horizontal : Orientation.Vertical);
// if a camera is not ready or didn't detect a person, cancel coordinates calculation
if (cameraCoordinates == null)
{
applyCoordinates = false;
}
else
{
coordinates.X = Math.Max(coordinates.X, cameraCoordinates.Value.X);
coordinates.Y = Math.Max(coordinates.Y, cameraCoordinates.Value.Y);
}
}
if (applyCoordinates)
{
result.SetCoordinates(coordinates);
if (isBalancing)
{
float[] channels = new float[outputAudioDevice.AudioEndpointVolume.Channels.Count];
for (int i = 0; i < outputAudioDevice.AudioEndpointVolume.Channels.Count; i++)
{
channels[i] = (float)volumeInterpolation.GetVolumeForPositionAndSpeaker(coordinates.X, coordinates.Y, i);
}
volumeFader.Set(channels);
}
}
// dispatch the result ready event and update the main window
if (Application.Current != null)
{
Application.Current.Dispatcher.Invoke(() => {
OnResultReady(result);
if (isBalancing)
{
if (Application.Current.MainWindow is MainWindow)
{
((MainWindow)Application.Current.MainWindow).UpdateChannelLevels();
}
}
});
}
}
/// <summary>
/// Calls the event listeners when a new result is ready.
/// </summary>
/// <param name="result">New result.</param>
protected virtual void OnResultReady(WorkerResult result)
{
if (ResultReady != null)
{
ResultReadyEventArgs args = new ResultReadyEventArgs();
args.Result = result;
ResultReady(this, args);
}
}
