private void PerformStop(Exception e)
{
timer.Enabled = false;
audioClient?.Stop();
RaisePlaybackStopped(e);
audioClient?.Reset();
}
private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = false;
try
{
_audioServer.Stop();
}
catch (Exception ex)
{
MessageBox.Show("服务器关闭异常，Error:" + ex.Message);
}
try
{
_audioClient1.Stop();
}
catch (Exception ex)
{
MessageBox.Show("客户端一关闭异常，Error:" + ex.Message);
}
try
{
_audioClient2.Stop();
}
catch (Exception ex)
{
MessageBox.Show("客户端二关闭异常，Error:" + ex.Message);
}
}
public void StopCapture()
{
cancelTokenSource.Cancel();
captureTask.Wait(); // Wait for task to finish
micAudioClient.Stop();
speakAudioClient.Stop();
captureTask.Dispose();
}
public void Dispose()
{
if (_audioClient == null)
{
return;
}
_audioClient.Stop();
_audioClient.Dispose();
_audioClient = null;
// Not disposing the device as it may be in use in a recording.
}
public void StopListeningForPeakLevel()
{
if (_audioClient == null)
{
return;
}
_audioClient.Stop();
_audioClient.Dispose();
_audioClient = null;
_audioClient = null;
}
public void StopListeningForPeakLevel()
{
if (_audioClientMic == null)
{
return;
}
_audioClientMic.Stop();
_audioClientMic.Dispose();
_audioClientMic = null;
if (_audioClientSpeak == null)
{
return;
}
_audioClientSpeak.Stop();
_audioClientSpeak.Dispose();
_audioClientSpeak = null;
}
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");
}
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];
FillBuffer(playbackProvider, bufferFrameCount);
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);
}
}
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(AudioClient client)
{
Debug.WriteLine(client.BufferSize);
var buf = new Byte[client.BufferSize * bytesPerFrame];
int bufLength = 0;
int minPacketSize = waveFormat.AverageBytesPerSecond / 100; //100ms
IntPtr hEvent = NativeMethods.CreateEventEx(IntPtr.Zero, IntPtr.Zero, 0, EventAccess.EVENT_ALL_ACCESS);
client.SetEventHandle(hEvent);
try
{
AudioCaptureClient capture = client.AudioCaptureClient;
client.Start();
int packetSize = capture.GetNextPacketSize();
while (!this.stop)
{
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;
System.Runtime.InteropServices.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);
NativeMethods.CloseHandle(hEvent);
client.Stop();
client.Dispose();
}
}
/// <summary>
/// Begin Playback
/// </summary>
public void Play()
{
if (PlaybackState == EPlaybackState.Playing)
{
return;
}
if (PlaybackState == EPlaybackState.Paused)
{
PlaybackState = EPlaybackState.Playing;
return;
}
Debug.WriteLine("[render]Task starting...");
playTask = Task.Run(() => {
IWaveProvider playbackProvider = this.sourceProvider;
AudioClient client = this.audioClient;
Exception exception = null;
PlaybackState = EPlaybackState.Playing;
try
{
// fill a whole buffer
var bufferFrameCount = client.BufferSize;
var bytesPerFrame = outputFormat.Channels * outputFormat.BitsPerSample / 8;
readBuffer = new byte[bufferFrameCount * bytesPerFrame];
//FillBuffer(playbackProvider, bufferFrameCount);
client.Start();
while (PlaybackState != EPlaybackState.Stopped)
{
// If using Event Sync, Wait for notification from AudioClient or Sleep half latency
if (isUsingEventSync)
{
//indexHandle = WaitHandle.WaitAny(waitHandles, 3 * latencyMilliseconds, false);
frameEventWaitHandle.WaitOne(3 * latencyMilliseconds);
}
else
{
Task.Delay(latencyMilliseconds / 2);
}
// If still playing and notification is ok
if (PlaybackState != EPlaybackState.Playing)
{
continue;
}
// See how much buffer space is available.
int numFramesPadding = 0;
if (isUsingEventSync)
{
// In exclusive mode, always ask the max = bufferFrameCount = audioClient.BufferSize
numFramesPadding = (shareMode == EAudioClientShareMode.Shared) ? client.CurrentPadding : 0;
}
else
{
numFramesPadding = client.CurrentPadding;
}
int numFramesAvailable = bufferFrameCount - numFramesPadding;
if (numFramesAvailable > 0)
{
FillBuffer(playbackProvider, numFramesAvailable);
}
}
}
catch (Exception e)
{
Debug.WriteLine("[render]Task catch Exception.");
Debug.WriteLine(e.Message);
Debug.WriteLine(e.Source);
Debug.WriteLine(e.StackTrace);
exception = e;
}
finally
{
client.Stop();
client.Reset();
Debug.WriteLine("[render]Task stop detected.");
RaisePlaybackStopped(exception);
}
});
Debug.WriteLine("[render]Task started");
}
private void PlayThread()
{
try
{
AudioBuffer buff = GetBuffer(false);
if (buff == null)
{
RaisePlaybackStopped();
return;
}
audioClient.Reset();
// fill a whole buffer
IntPtr buffer = renderClient.GetBuffer(buff.Length);
Marshal.Copy(buff.Bytes, 0, buffer, buff.ByteLength);
renderClient.ReleaseBuffer(buff.Length, AudioClientBufferFlags.None);
ReleaseBuffer(buff, false, 0);
// Create WaitHandle for sync
if (frameEventWaitHandle != null)
{
frameEventWaitHandle.Reset();
}
audioClient.Start();
if (isUsingEventSync && shareMode == AudioClientShareMode.Exclusive)
{
while (playbackState != PlaybackState.Stopped)
{
int indexHandle = WaitHandle.WaitAny(waitHandles, 10 * latencyMilliseconds, false);
if (playbackState == PlaybackState.Playing && indexHandle != WaitHandle.WaitTimeout)
{
// In exclusive mode, always ask the max = bufferFrameCount = audioClient.BufferSize
buff = GetBuffer(false);
if (buff == null)
{
break;
}
buffer = renderClient.GetBuffer(buff.Length);
Marshal.Copy(buff.Bytes, 0, buffer, buff.ByteLength);
renderClient.ReleaseBuffer(buff.Length, AudioClientBufferFlags.None);
ReleaseBuffer(buff, false, 0);
}
}
}
else
{
buff = null;
int offs = 0;
while (playbackState != PlaybackState.Stopped)
{
// If using Event Sync, Wait for notification from AudioClient or Sleep half latency
int indexHandle = 0;
if (isUsingEventSync)
{
indexHandle = WaitHandle.WaitAny(waitHandles, 3 * latencyMilliseconds, false);
}
else
{
Thread.Sleep(latencyMilliseconds / 2);
}
// If still playing and notification is ok
if (playbackState == PlaybackState.Playing && indexHandle != WaitHandle.WaitTimeout)
{
// See how much buffer space is available.
int numFramesAvailable = bufferFrameCount - audioClient.CurrentPadding;
if (numFramesAvailable > 0)
{
if (buff == null)
{
buff = GetBuffer(false);
offs = 0;
}
if (buff == null)
{
break;
}
numFramesAvailable = Math.Min(numFramesAvailable, buff.Length - offs);
buffer = renderClient.GetBuffer(numFramesAvailable);
Marshal.Copy(buff.Bytes, offs * Settings.PCM.BlockAlign, buffer, numFramesAvailable * Settings.PCM.BlockAlign);
renderClient.ReleaseBuffer(numFramesAvailable, AudioClientBufferFlags.None);
offs += numFramesAvailable;
if (offs == buff.Length)
{
ReleaseBuffer(buff, false, 0);
buff = null;
}
}
}
}
}
//Thread.Sleep(isUsingEventSync ? latencyMilliseconds : latencyMilliseconds / 2);
audioClient.Stop();
if (playbackState == PlaybackState.Stopped)
{
audioClient.Reset();
}
}
catch (Exception ex)
{
playbackState = PlaybackState.Stopped;
ReleaseBuffer(readBuffers[0], false, 0);
ReleaseBuffer(readBuffers[1], false, 0);
playThread = null;
try
{
audioClient.Stop();
}
catch { }
RaisePlaybackException(ex);
return;
}
ReleaseBuffer(readBuffers[0], false, 0);
ReleaseBuffer(readBuffers[1], false, 0);
RaisePlaybackStopped();
}
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");
}
private void PlayThread()
{
ResamplerDmoStream resamplerDmoStream = null;
IWaveProvider playbackProvider = sourceProvider;
Exception exception = null;
Stopwatch sw = new Stopwatch();
sw.Start();
Thread.CurrentThread.Priority = ThreadPriority.Highest;
var lastOutput = sw.ElapsedMilliseconds;
try
{
if (dmoResamplerNeeded)
{
resamplerDmoStream = new ResamplerDmoStream(sourceProvider, outputFormat);
playbackProvider = resamplerDmoStream;
}
// fill a whole buffer
bufferFrameCount = audioClient.BufferSize;
bytesPerFrame = outputFormat.Channels * outputFormat.BitsPerSample / 8;
readBuffer = new byte[bufferFrameCount * bytesPerFrame];
FillBuffer(playbackProvider, bufferFrameCount);
// Create WaitHandle for sync
var waitHandles = new WaitHandle[] { frameEventWaitHandle };
audioClient.Start();
started = true;
while (playbackState != PlaybackState.Stopped)
{
// If using Event Sync, Wait for notification from AudioClient or Sleep half latency
int indexHandle = 0;
if (isUsingEventSync)
{
indexHandle = WaitHandle.WaitAny(waitHandles, 3 * latencyMilliseconds, false);
}
else
{
Thread.Sleep(latencyMilliseconds / 2);
}
var now = sw.ElapsedMilliseconds;
// If still playing and notification is ok
if (playbackState == PlaybackState.Playing && indexHandle != WaitHandle.WaitTimeout)
{
// See how much buffer space is available.
int numFramesPadding;
if (isUsingEventSync)
{
// In exclusive mode, always ask the max = bufferFrameCount = audioClient.BufferSize
numFramesPadding = (shareMode == AudioClientShareMode.Shared) ? audioClient.CurrentPadding : 0;
}
else
{
numFramesPadding = audioClient.CurrentPadding;
}
int numFramesAvailable = bufferFrameCount - numFramesPadding;
if (numFramesAvailable > 10) // see https://naudio.codeplex.com/workitem/16363
{
Console.WriteLine("time:" + now + ", count:" + numFramesAvailable);
FillBuffer(playbackProvider, numFramesAvailable);
Console.WriteLine("fill buffer time:" + now + ", count:" + numFramesAvailable);
lastOutput = now;
}
else
{
if (now - lastOutput > 15)
{
Console.WriteLine("not finished:" + (now - lastOutput) + ", CurrentPadding:" + audioClient.CurrentPadding);
}
}
}
if (now - lastOutput > 15)
{
Console.WriteLine();
}
}
Thread.Sleep(latencyMilliseconds / 2);
audioClient.Stop();
if (playbackState == PlaybackState.Stopped)
{
audioClient.Reset();
}
}
catch (Exception e)
{
exception = e;
}
finally
{
if (resamplerDmoStream != null)
{
resamplerDmoStream.Dispose();
}
RaisePlaybackStopped(exception);
}
}
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);
}
}
//based on http://msdn.microsoft.com/en-us/library/windows/desktop/dd370800(v=vs.85).aspx
private void CaptureProc(object playbackStartedEventWaitHandle)
{
try
{
int bufferSize;
int frameSize;
long actualDuration;
int actualLatency;
int sleepDuration;
byte[] buffer;
int eventWaitHandleIndex;
WaitHandle[] eventWaitHandleArray;
bufferSize = _audioClient.BufferSize;
frameSize = WaveFormat.Channels * WaveFormat.BytesPerSample;
actualDuration = (long)((double)REFTIMES_PER_SEC * bufferSize / WaveFormat.SampleRate);
actualLatency = (int)(actualDuration / REFTIMES_PER_MILLISEC);
sleepDuration = actualLatency / 8;
buffer = new byte[bufferSize * frameSize];
eventWaitHandleIndex = WaitHandle.WaitTimeout;
eventWaitHandleArray = new WaitHandle[] { _eventWaitHandle };
_audioClient.Start();
_recordingState = SoundIn.RecordingState.Recording;
if (playbackStartedEventWaitHandle is EventWaitHandle)
{
((EventWaitHandle)playbackStartedEventWaitHandle).Set();
playbackStartedEventWaitHandle = null;
}
while (RecordingState != SoundIn.RecordingState.Stopped)
{
if (_eventSync)
{
eventWaitHandleIndex = WaitHandle.WaitAny(eventWaitHandleArray, actualLatency, false);
if (eventWaitHandleIndex == WaitHandle.WaitTimeout)
{
continue;
}
}
else
{
Thread.Sleep(sleepDuration);
}
if (RecordingState == SoundIn.RecordingState.Recording)
{
ReadData(buffer, _audioCaptureClient, (uint)frameSize);
}
}
Thread.Sleep(actualLatency / 2);
_audioClient.Stop();
_audioClient.Reset();
}
finally
{
if (playbackStartedEventWaitHandle is EventWaitHandle)
{
((EventWaitHandle)playbackStartedEventWaitHandle).Set();
}
RaiseStopped();
}
}
//based on http://msdn.microsoft.com/en-us/library/windows/desktop/dd370800(v=vs.85).aspx
private void CaptureProc(object param)
{
var playbackStartedEventWaitHandle = param as EventWaitHandle;
Exception exception = null;
try
{
int bufferSize = _audioClient.BufferSize;
int frameSize = WaveFormat.Channels * WaveFormat.BytesPerSample;
long actualDuration = (long)((double)ReftimesPerSecond * bufferSize / WaveFormat.SampleRate);
int actualLatency = (int)(actualDuration / ReftimesPerMillisecond);
int sleepDuration = actualLatency / 8;
byte[] buffer = new byte[bufferSize * frameSize];
WaitHandle[] eventWaitHandleArray = { _eventWaitHandle };
_audioClient.Start();
_recordingState = RecordingState.Recording;
if (playbackStartedEventWaitHandle != null)
{
playbackStartedEventWaitHandle.Set();
playbackStartedEventWaitHandle = null;
}
while (RecordingState != RecordingState.Stopped)
{
if (_eventSync)
{
int eventWaitHandleIndex = WaitHandle.WaitAny(eventWaitHandleArray, actualLatency, false);
if (eventWaitHandleIndex == WaitHandle.WaitTimeout)
{
continue;
}
}
else
{
Thread.Sleep(sleepDuration);
}
if (RecordingState == RecordingState.Recording)
{
ReadData(buffer, _audioCaptureClient, (uint)frameSize);
}
}
Thread.Sleep(actualLatency / 2);
_audioClient.Stop();
_audioClient.Reset();
}
catch (Exception ex)
{
exception = ex;
}
finally
{
if (playbackStartedEventWaitHandle != null)
{
playbackStartedEventWaitHandle.Set();
}
RaiseStopped(exception);
}
}
private void PlayThread()
{
ResamplerDmoStream resamplerDmoStream = null;
IWaveProvider playbackProvider = this.sourceProvider;
Exception exception = null;
try
{
if (this.dmoResamplerNeeded)
{
resamplerDmoStream = new ResamplerDmoStream(sourceProvider, outputFormat);
playbackProvider = resamplerDmoStream;
}
// fill a whole buffer
bufferFrameCount = audioClient.BufferSize;
bytesPerFrame = outputFormat.Channels * outputFormat.BitsPerSample / 8;
readBuffer = new byte[bufferFrameCount * bytesPerFrame];
FillBuffer(playbackProvider, bufferFrameCount);
// Create WaitHandle for sync
WaitHandle[] waitHandles = new WaitHandle[] { frameEventWaitHandle };
audioClient.Start();
while (playbackState != PlaybackState.Stopped)
{
// If using Event Sync, Wait for notification from AudioClient or Sleep half latency
int indexHandle = 0;
if (isUsingEventSync)
{
indexHandle = WaitHandle.WaitAny(waitHandles, 3 * latencyMilliseconds, false);
}
else
{
Thread.Sleep(latencyMilliseconds / 2);
}
// If still playing and notification is ok
if (playbackState == PlaybackState.Playing && indexHandle != WaitHandle.WaitTimeout)
{
// See how much buffer space is available.
int numFramesPadding = 0;
if (isUsingEventSync)
{
// In exclusive mode, always ask the max = bufferFrameCount = audioClient.BufferSize
numFramesPadding = (shareMode == AudioClientShareMode.Shared) ? audioClient.CurrentPadding : 0;
}
else
{
numFramesPadding = audioClient.CurrentPadding;
}
int numFramesAvailable = bufferFrameCount - numFramesPadding;
if (numFramesAvailable > 0)
{
FillBuffer(playbackProvider, numFramesAvailable);
}
}
}
Thread.Sleep(latencyMilliseconds / 2);
audioClient.Stop();
if (playbackState == PlaybackState.Stopped)
{
audioClient.Reset();
}
}
catch (Exception e)
{
exception = e;
}
finally
{
if (resamplerDmoStream != null)
{
resamplerDmoStream.Dispose();
}
RaisePlaybackStopped(exception);
}
}
private void PlaybackProc(object playbackStartedEventWaithandle)
{
try
{
int bufferSize;
int frameSize;
byte[] buffer;
int eventWaitHandleIndex;
WaitHandle[] eventWaitHandleArray;
bufferSize = _audioClient.BufferSize;
frameSize = _outputFormat.Channels * _outputFormat.BytesPerSample;
buffer = new byte[bufferSize * frameSize];
eventWaitHandleIndex = WaitHandle.WaitTimeout;
eventWaitHandleArray = new WaitHandle[] { _eventWaitHandle };
//001
/*if (!FeedBuffer(_renderClient, buffer, bufferSize, frameSize)) //todo: might cause a deadlock: play() is waiting on eventhandle but FeedBuffer got already called
* {
* _playbackState = PlaybackState.Stopped;
* if (playbackStartedEventWaithandle is EventWaitHandle)
* {
* ((EventWaitHandle)playbackStartedEventWaithandle).Set();
* playbackStartedEventWaithandle = null;
* }
* }
* else
* {*/
_audioClient.Start();
_playbackState = SoundOut.PlaybackState.Playing;
if (playbackStartedEventWaithandle is EventWaitHandle)
{
((EventWaitHandle)playbackStartedEventWaithandle).Set();
playbackStartedEventWaithandle = null;
}
while (PlaybackState != PlaybackState.Stopped)
{
if (_eventSync) //based on the "RenderSharedEventDriven"-Sample: http://msdn.microsoft.com/en-us/library/dd940520(v=vs.85).aspx
{
eventWaitHandleIndex = WaitHandle.WaitAny(eventWaitHandleArray, 3 * _latency, false);
//3 * latency = see msdn: recommended timeout
if (eventWaitHandleIndex == WaitHandle.WaitTimeout)
{
continue;
}
}
else //based on the "RenderSharedTimerDriven"-Sample: http://msdn.microsoft.com/en-us/library/dd940521(v=vs.85).aspx
{
Thread.Sleep(_latency / 8);
}
if (PlaybackState == PlaybackState.Playing)
{
int padding;
if (_eventSync && _shareMode == AudioClientShareMode.Exclusive)
{
padding = 0;
}
else
{
padding = _audioClient.GetCurrentPadding();
}
int framesReadyToFill = bufferSize - padding;
if (framesReadyToFill > 5 &&
!(_source is DmoResampler &&
((DmoResampler)_source).OutputToInput(framesReadyToFill * frameSize) <= 0)) //avoid conversion errors
{
if (!FeedBuffer(_renderClient, buffer, framesReadyToFill, frameSize))
{
_playbackState = PlaybackState.Stopped; //TODO: Fire Stopped-event here?
}
}
}
}
Thread.Sleep(_latency / 2);
_audioClient.Stop();
_audioClient.Reset();
//}
}
finally
{
//CleanupResources();
if (playbackStartedEventWaithandle is EventWaitHandle)
{
((EventWaitHandle)playbackStartedEventWaithandle).Set();
}
RaiseStopped();
}
}
