internal AudioEndpointVolumeChannels(IAudioEndpointVolume parent)
{
int ChannelCount;
_AudioEndPointVolume = parent;
ChannelCount = Count;
_Channels = new AudioEndpointVolumeChannel[ChannelCount];
for (int i = 0; i < ChannelCount; i++)
{
_Channels[i] = new AudioEndpointVolumeChannel(_AudioEndPointVolume, i);
}
}
/// <summary>
/// Test tone stopped event.
/// Calculates the recorded volume and proceeds to the next channel/speaker.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TestToneStopped(object sender, StoppedEventArgs e)
{
if (isCanceled)
{
return;
}
// if all speakers are configured, proceed to the next step
MMDevice outputAudioDevice = workerThread.GetOutputAudioDevice();
if (speakerStep >= outputAudioDevice.AudioEndpointVolume.Channels.Count * 2)
{
manager.NextStep();
return;
}
// mute all channels to be ready for the next step
MuteAllChannels();
// store the average recorded volume
int channelIndex = speakerStep / 2;
if (!volumes.ContainsKey((speakerStep - 1) / 2))
{
volumes[(speakerStep - 1) / 2] = new float[3];
volumes[(speakerStep - 1) / 2][2] = originalChannelVolume[(speakerStep - 1) / 2];
}
float volume = testTone.GetAverageCaptureVolume() * volumeScalingFactor;
manager.SetAudioInputDeviceVolume(volume);
volumes[(speakerStep - 1) / 2][(speakerStep - 1) % 2] = volume;
AudioEndpointVolumeChannel audioEndpointVolume = outputAudioDevice.AudioEndpointVolume.Channels[channelIndex];
if (speakerStep % 2 == 0)
{
// configure the next channel
audioEndpointVolume.VolumeLevelScalar = originalChannelVolume[channelIndex];
speakerStep++;
manager.SetInstructions("Calibrating speakers channel " + channelIndex + " - Step 1");
testTone.Play(TestToneLength, new EventHandler <StoppedEventArgs>(TestToneStopped));
}
else
{
// repeat the recording with half of the volume to check how much a volume change influences the recorded volume
audioEndpointVolume.VolumeLevelScalar = originalChannelVolume[channelIndex] / 2;
speakerStep++;
manager.SetInstructions("Calibrating speakers channel " + channelIndex + " - Step 2");
testTone.Play(TestToneLength, new EventHandler <StoppedEventArgs>(TestToneStopped));
}
}
