/// <summary>
/// The Initialize Audio Client
/// </summary>
/// <param name="audioFlow"></param>
/// <param name="_deviceEnumerator"></param>
private void InitializeAudioClient()
{
//Get Audio Client from device
COMResult result = _audioDevice.Activate(typeof(IAudioClient).GUID, 0, IntPtr.Zero, out object obj);
_audioClient = (IAudioClient)obj;
//Get Audio Meter from device
result = _audioDevice.Activate(typeof(IAudioMeterInformation).GUID, 0, IntPtr.Zero, out obj);
_audioMeter = (IAudioMeterInformation)obj;
//Get Audio End Point
result = _audioDevice.Activate(typeof(IAudioEndpointVolume).GUID, 0, IntPtr.Zero, out obj);
_audioEndpointVolume = (IAudioEndpointVolume)obj;
_audioEndpointVolume.RegisterControlChangeNotify(classCallBack);
//Initialize Audio Client.
_sessionGuid = new Guid();
result = _audioClient.GetMixFormat(out waveFormat);
AudioClientStreamFlags streamFlag = AudioClientStreamFlags.None;
if (_audioDataFlow == AudioDataFlow.eRender)
{
streamFlag = AudioClientStreamFlags.Loopback;
}
result = _audioClient.Initialize(AudioClientMode.Shared, streamFlag, 10000000, 0, waveFormat, ref _sessionGuid);
result = _audioClient.Start();
//Change wave format here
SetupWaveFormat(waveFormat);
result = _audioEndpointVolume.GetChannelCount(out _channelCount);
}
public uint GetChannelCount()
{
uint result = 0;
int retVal = iAudioEndpoint.GetChannelCount(ref result);
Marshal.ThrowExceptionForHR(retVal);
return(result);
}
public AudioDeviceChannelCollection(IAudioEndpointVolume deviceVolume, Dispatcher dispatcher)
{
_dispatcher = dispatcher;
var ret = new List <AudioDeviceChannel>();
for (uint i = 0; i < deviceVolume.GetChannelCount(); i++)
{
ret.Add(new AudioDeviceChannel(deviceVolume, i));
}
Channels = ret;
AUDIO_VOLUME_NOTIFICATION_DATA dummy;
_afChannelVolumesOffset = Marshal.OffsetOf <AUDIO_VOLUME_NOTIFICATION_DATA>(nameof(dummy.afChannelVolumes)).ToInt32();
}