/// <summary>
/// Creates a new WASAPI Output
/// </summary>
/// <param name="device">Device to use</param>
/// <param name="shareMode"></param>
/// <param name="useEventSync">true if sync is done with event. false use sleep.</param>
/// <param name="latency"></param>
public WasapiOut(MMDevice device, AudioClientShareMode shareMode, bool useEventSync, int latency)
{
this.audioClient = device.AudioClient;
this.mmDevice = device;
this.shareMode = shareMode;
this.isUsingEventSync = useEventSync;
this.latencyMilliseconds = latency;
this.syncContext = SynchronizationContext.Current;
}
/// <summary>
/// Initialises a new instance of the WASAPI capture class
/// </summary>
/// <param name="captureDevice">Capture device to use</param>
public WasapiCapture(MMDevice captureDevice)
{
syncContext = SynchronizationContext.Current;
audioClient = captureDevice.AudioClient;
ShareMode = AudioClientShareMode.Shared;
waveFormat = audioClient.MixFormat;
var wfe = waveFormat as WaveFormatExtensible;
if (wfe != null)
{
try
{
waveFormat = wfe.ToStandardWaveFormat();
}
catch (InvalidOperationException)
{
// couldn't convert to a standard format
}
}
}
private void DoRecording(AudioClient client)
{
Debug.WriteLine(String.Format("Client buffer frame count: {0}", client.BufferSize));
int bufferFrameCount = client.BufferSize;
// Calculate the actual duration of the allocated buffer.
long actualDuration = (long)((double)REFTIMES_PER_SEC *
bufferFrameCount / WaveFormat.SampleRate);
int sleepMilliseconds = (int)(actualDuration / REFTIMES_PER_MILLISEC / 2);
AudioCaptureClient capture = client.AudioCaptureClient;
client.Start();
Debug.WriteLine(string.Format("sleep: {0} ms", sleepMilliseconds));
while (!this.requestStop)
{
Thread.Sleep(sleepMilliseconds);
ReadNextPacket(capture);
}
}
private void CaptureThread(AudioClient client)
{
Exception exception = null;
try
{
DoRecording(client);
}
catch (Exception e)
{
exception = e;
}
finally
{
client.Stop();
// don't dispose - the AudioClient only gets disposed when WasapiCapture is disposed
}
captureThread = null;
RaiseRecordingStopped(exception);
Debug.WriteLine("Stop wasapi");
}
/// <summary>
/// Dispose
/// </summary>
public void Dispose()
{
StopRecording();
if (captureThread != null)
{
captureThread.Join();
captureThread = null;
}
if (audioClient != null)
{
audioClient.Dispose();
audioClient = null;
}
}
/// <summary>
/// Dispose
/// </summary>
public void Dispose()
{
if (audioClient != null)
{
Stop();
audioClient.Dispose();
audioClient = null;
renderClient = null;
}
}
