private async void PlayThread()
{
MediaFoundationResampler mediaFoundationResampler = null;
IWaveProvider playbackProvider = this.sourceProvider;
Exception exception = null;
try
{
if (this.resamplerNeeded)
{
mediaFoundationResampler = new MediaFoundationResampler(sourceProvider, outputFormat);
playbackProvider = mediaFoundationResampler;
}
// fill a whole buffer
bufferFrameCount = audioClient.BufferSize;
bytesPerFrame = outputFormat.Channels * outputFormat.BitsPerSample / 8;
readBuffer = new byte[bufferFrameCount * bytesPerFrame];
FillBuffer(playbackProvider, bufferFrameCount);
audioClient.Start();
while (playbackState != PlaybackState.Stopped)
{
// If using Event Sync, Wait for notification from AudioClient or Sleep half latency
int timeout = 3 * latencyMilliseconds;
var r = NativeMethods.WaitForSingleObjectEx(frameEventWaitHandle, timeout, true);
if (r != 0)
{
throw new InvalidOperationException("Timed out waiting for event");
}
// If still playing and notification is ok
if (playbackState == PlaybackState.Playing)
{
// See how much buffer space is available.
int numFramesPadding = 0;
// In exclusive mode, always ask the max = bufferFrameCount = audioClient.BufferSize
numFramesPadding = (shareMode == AudioClientShareMode.Shared) ? audioClient.CurrentPadding : 0;
int numFramesAvailable = bufferFrameCount - numFramesPadding;
if (numFramesAvailable > 0)
{
FillBuffer(playbackProvider, numFramesAvailable);
}
}
}
// play the buffer out
while (audioClient.CurrentPadding > 0)
{
await Task.Delay(latencyMilliseconds / 2);
}
audioClient.Stop();
if (playbackState == PlaybackState.Stopped)
{
audioClient.Reset();
}
}
catch (Exception e)
{
exception = e;
}
finally
{
if (mediaFoundationResampler != null)
{
mediaFoundationResampler.Dispose();
}
RaisePlaybackStopped(exception);
}
}
private async void PlayThread()
{
await Activate();
var playbackProvider = Init();
bool isClientRunning = false;
try
{
if (this.resamplerNeeded)
{
var resampler = new WdlResamplingSampleProvider(playbackProvider.ToSampleProvider(), outputFormat.SampleRate);
playbackProvider = new SampleToWaveProvider(resampler);
}
// fill a whole buffer
bufferFrameCount = audioClient.BufferSize;
bytesPerFrame = outputFormat.Channels * outputFormat.BitsPerSample / 8;
//readBuffer = new byte[bufferFrameCount*bytesPerFrame];
int desiredReadLength = bufferFrameCount * bytesPerFrame;
int providableReadLength = bufferFrameCount * playbackProvider.WaveFormat.Channels * playbackProvider.WaveFormat.BitsPerSample / 8;
readBuffer = new byte[providableReadLength];
newReadBuffer = new byte[desiredReadLength > providableReadLength ? desiredReadLength : providableReadLength];
FillBuffer(playbackProvider, bufferFrameCount, outputFormat.Channels, playbackProvider.WaveFormat.Channels, playbackProvider.WaveFormat.BitsPerSample);
int timeout = 3 * latencyMilliseconds;
while (playbackState != WasapiOutState.Disposed)
{
if (playbackState != WasapiOutState.Playing)
{
playThreadEvent.WaitOne(500);
}
// If still playing and notification is ok
if (playbackState == WasapiOutState.Playing)
{
if (!isClientRunning)
{
audioClient.Start();
isClientRunning = true;
}
// If using Event Sync, Wait for notification from AudioClient or Sleep half latency
var r = NativeMethods.WaitForSingleObjectEx(frameEventWaitHandle, timeout, true);
if (r != 0)
{
throw new InvalidOperationException("Timed out waiting for event");
}
// See how much buffer space is available.
int numFramesPadding = 0;
// In exclusive mode, always ask the max = bufferFrameCount = audioClient.BufferSize
numFramesPadding = (shareMode == AudioClientShareMode.Shared) ? audioClient.CurrentPadding : 0;
int numFramesAvailable = bufferFrameCount - numFramesPadding;
if (numFramesAvailable > 0)
{
FillBuffer(playbackProvider, numFramesAvailable, outputFormat.Channels, playbackProvider.WaveFormat.Channels, playbackProvider.WaveFormat.BitsPerSample);
}
}
if (playbackState == WasapiOutState.Stopping)
{
// play the buffer out
while (audioClient.CurrentPadding > 0)
{
await Task.Delay(latencyMilliseconds / 2);
}
audioClient.Stop();
isClientRunning = false;
audioClient.Reset();
playbackState = WasapiOutState.Stopped;
RaisePlaybackStopped(null);
}
if (playbackState == WasapiOutState.Disposing)
{
audioClient.Stop();
isClientRunning = false;
audioClient.Reset();
playbackState = WasapiOutState.Disposed;
var disposablePlaybackProvider = playbackProvider as IDisposable;
if (disposablePlaybackProvider != null)
{
disposablePlaybackProvider.Dispose(); // do everything on this thread, even dispose in case it is Media Foundation
}
RaisePlaybackStopped(null);
}
}
}
catch (Exception e)
{
RaisePlaybackStopped(e);
}
finally
{
audioClient.Dispose();
audioClient = null;
renderClient = null;
NativeMethods.CloseHandle(frameEventWaitHandle);
}
}
private void DoRecording()
{
Debug.WriteLine("Recording buffer size: " + audioClient.BufferSize);
var buf = new Byte[audioClient.BufferSize * bytesPerFrame];
int bufLength = 0;
int minPacketSize = waveFormat.AverageBytesPerSecond / 100; //100ms
try
{
AudioCaptureClient capture = audioClient.AudioCaptureClient;
audioClient.Start();
int packetSize = capture.GetNextPacketSize();
while (captureState == WasapiCaptureState.Recording)
{
IntPtr pData = IntPtr.Zero;
int numFramesToRead = 0;
AudioClientBufferFlags dwFlags = 0;
if (packetSize == 0)
{
if (NativeMethods.WaitForSingleObjectEx(hEvent, 100, true) != 0)
{
throw new Exception("Capture event timeout");
}
}
pData = capture.GetBuffer(out numFramesToRead, out dwFlags);
if ((int)(dwFlags & AudioClientBufferFlags.Silent) > 0)
{
pData = IntPtr.Zero;
}
if (numFramesToRead == 0)
{
continue;
}
int capturedBytes = numFramesToRead * bytesPerFrame;
if (pData == IntPtr.Zero)
{
Array.Clear(buf, bufLength, capturedBytes);
}
else
{
Marshal.Copy(pData, buf, bufLength, capturedBytes);
}
bufLength += capturedBytes;
capture.ReleaseBuffer(numFramesToRead);
if (bufLength >= minPacketSize)
{
if (DataAvailable != null)
{
DataAvailable(this, new WaveInEventArgs(buf, bufLength));
}
bufLength = 0;
}
packetSize = capture.GetNextPacketSize();
}
}
catch (Exception ex)
{
RaiseRecordingStopped(ex);
Debug.WriteLine("stop wasapi");
}
finally
{
RaiseRecordingStopped(null);
audioClient.Stop();
}
Debug.WriteLine("stop wasapi");
}
