/// <summary>
/// Start the speaker configuration step.
/// A test tone will be played on all speakers and the volume recorded.
/// </summary>
public void Start()
{
MMDevice outputAudioDevice = workerThread.GetOutputAudioDevice();
MMDevice inputAudioDevice = workerThread.GetInputAudioDevice();
isCanceled = false;
volumes = new Dictionary <int, float[]>();
originalChannelVolume.Clear();
speakerStep = 1;
// get the current channel volumes to reset it when the configuration is done
for (int i = 0; i < outputAudioDevice.AudioEndpointVolume.Channels.Count; i++)
{
originalChannelVolume.Add(i, outputAudioDevice.AudioEndpointVolume.Channels[i].VolumeLevelScalar);
}
testTone = new TestTone(outputAudioDevice, inputAudioDevice);
// if this is the first time this step gets executed, record the volume level and calculate a target to scale it to
if (volumeScalingFactor == 0)
{
manager.SetInstructions("Calibrating max volume");
testTone.Play(TestToneLength, delegate(object sender, StoppedEventArgs e)
{
float maxVolume = testTone.GetAverageCaptureVolume();
volumeScalingFactor = TestToneScalingTarget / maxVolume;
manager.SetAudioInputDeviceVolume(maxVolume * volumeScalingFactor);
MuteAllChannels();
manager.SetInstructions("Calibrating speakers channel " + (speakerStep / 2) + " - Step 1");
outputAudioDevice.AudioEndpointVolume.Channels[0].VolumeLevelScalar = originalChannelVolume[0];
testTone.Play(TestToneLength, new EventHandler <StoppedEventArgs>(TestToneStopped));
});
}
else
{
// start with first channel
MuteAllChannels();
manager.SetInstructions("Calibrating speakers channel " + (speakerStep / 2) + " - Step 1");
outputAudioDevice.AudioEndpointVolume.Channels[0].VolumeLevelScalar = originalChannelVolume[0];
testTone.Play(TestToneLength, new EventHandler <StoppedEventArgs>(TestToneStopped));
}
}
/// <summary>
/// Updates the enabled state of the start button.
/// Requires all devices to be selected and a unique name for an enabled button.
/// </summary>
private void UpdateStartButton()
{
if (workerThread.GetCameras().Keys.Count >= 2 && workerThread.GetOutputAudioDevice() != null && workerThread.GetInputAudioDevice() != null && roomNameTextBox.Text.Trim().Length > 0 && !Configuration.GetInstance().Rooms.ContainsKey(roomNameTextBox.Text))
{
startCalibrationButton.IsEnabled = true;
}
else
{
startCalibrationButton.IsEnabled = false;
}
}
/// <summary>
/// Main thread function. Fades the volume for all channels to the target volume.
/// </summary>
private void Run()
{
try
{
while (true)
{
MMDevice outputAudioDevice = workerThread.GetOutputAudioDevice();
bool allAtTarget = true;
for (int i = 0; i < targetVolumes.Length; i++)
{
if (i == 0)
{
float current = outputAudioDevice.AudioEndpointVolume.Channels[i].VolumeLevelScalar;
// check if the target volume is already reached
if (current >= targetVolumes[i] - 0.0075 && current <= targetVolumes[i] + 0.0075)
{
continue;
}
allAtTarget = false;
if (current > targetVolumes[i])
{
outputAudioDevice.AudioEndpointVolume.Channels[i].VolumeLevelScalar = current - 0.01f;
}
else
{
outputAudioDevice.AudioEndpointVolume.Channels[i].VolumeLevelScalar = current + 0.01f;
}
}
}
if (allAtTarget)
{
break;
}
Thread.Sleep(30);
}
}
catch (ThreadInterruptedException)
{}
}