/// <summary>
/// The GetSimpleAudioVolume method retrieves a simple audio volume control.
/// </summary>
/// <param name="crossProcessSession">Specifies whether the request is for a cross-process session. Set to TRUE if the session is cross-process. Set to FALSE if the session is not cross-process.</param>
/// <param name="audioSessionGuid">If the GUID does not identify a session that has been previously opened, the call opens a new but empty session. If the value is Guid.Empty, the method assigns the stream to the default session.</param>
/// <returns>HRESULT</returns>
public unsafe int GetSimpleAudioVolumeNative(Guid audioSessionGuid, NativeBool crossProcessSession, out SimpleAudioVolume audioVolume)
{
audioVolume = null;
IntPtr ptr = IntPtr.Zero;
int result = InteropCalls.CallI(_basePtr, &audioSessionGuid, crossProcessSession, &ptr, ((void**)(*(void**)_basePtr))[4]);
if (ptr != IntPtr.Zero)
audioVolume = new SimpleAudioVolume(ptr);
return result;
}
/// <summary>
/// The GetSimpleAudioVolume method retrieves a simple audio volume control.
/// </summary>
/// <param name="crossProcessSession">Specifies whether the request is for a cross-process session. Set to TRUE if the session is cross-process. Set to FALSE if the session is not cross-process.</param>
/// <param name="audioSessionGuid">If the GUID does not identify a session that has been previously opened, the call opens a new but empty session. If the value is Guid.Empty, the method assigns the stream to the default session.</param>
/// <returns>HRESULT</returns>
public unsafe int GetSimpleAudioVolumeNative(Guid audioSessionGuid, NativeBool crossProcessSession, out SimpleAudioVolume audioVolume)
{
audioVolume = null;
IntPtr ptr = IntPtr.Zero;
int result = InteropCalls.CallI(_basePtr, &audioSessionGuid, crossProcessSession, &ptr, ((void **)(*(void **)_basePtr))[4]);
if (ptr != IntPtr.Zero)
{
audioVolume = new SimpleAudioVolume(ptr);
}
return(result);
}
private void InitializeInternal()
{
_audioClient = AudioClient.FromMMDevice(Device);
_outputFormat = SetupWaveFormat(_source.WaveFormat, _audioClient);
long latency = _latency * 10000;
if (!_eventSync)
{
_audioClient.Initialize(_shareMode, AudioClientStreamFlags.None, latency, 0, _outputFormat, Guid.Empty);
}
else //event sync
{
if (_shareMode == AudioClientShareMode.Exclusive) //exclusive
{
_audioClient.Initialize(_shareMode, AudioClientStreamFlags.StreamFlags_EventCallback, latency, latency, _outputFormat, Guid.Empty);
}
else //shared
{
_audioClient.Initialize(_shareMode, AudioClientStreamFlags.StreamFlags_EventCallback, 0, 0, _outputFormat, Guid.Empty);
_latency = (int)(_audioClient.StreamLatency / 10000);
}
_eventWaitHandle = new EventWaitHandle(false, EventResetMode.AutoReset);
_audioClient.SetEventHandle(_eventWaitHandle.SafeWaitHandle.DangerousGetHandle());
}
_renderClient = AudioRenderClient.FromAudioClient(_audioClient);
_simpleAudioVolume = SimpleAudioVolume.FromAudioClient(_audioClient);
_simpleAudioVolume.MasterVolume = 1f;
}
private void CleanupResources()
{
if (_createdResampler && _source is DmoResampler)
{
((DmoResampler)_source).DisposeResamplerOnly();
_source = null;
}
if (_renderClient != null)
{
_renderClient.Dispose();
_renderClient = null;
}
if (_audioClient != null)
{
try
{
_audioClient.Reset();
}
catch (CoreAudioAPIException ex)
{
if (ex.ErrorCode != unchecked((int)0x88890001)) //AUDCLNT_E_NOT_INITIALIZED
{
throw;
}
}
_audioClient.Dispose();
_audioClient = null;
}
if (_simpleAudioVolume != null)
{
_simpleAudioVolume.Dispose();
_simpleAudioVolume = null;
}
if (_eventWaitHandle != null)
{
_eventWaitHandle.Close();
_eventWaitHandle = null;
}
_isInitialized = false;
}
