private void InitializeInternal()
{
const int reftimesPerMillisecond = 10000;
_audioClient = AudioClient.FromMMDevice(Device);
_outputFormat = SetupWaveFormat(_source, _audioClient);
long latency = _latency * reftimesPerMillisecond;
AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED_TRY_AGAIN:
try
{
if (!_eventSync)
_audioClient.Initialize(_shareMode, AudioClientStreamFlags.None, latency, 0, _outputFormat,
Guid.Empty);
else //event sync
{
if (_shareMode == AudioClientShareMode.Exclusive) //exclusive
{
_audioClient.Initialize(_shareMode, AudioClientStreamFlags.StreamFlagsEventCallback, latency,
latency, _outputFormat, Guid.Empty);
}
else //shared
{
_audioClient.Initialize(_shareMode, AudioClientStreamFlags.StreamFlagsEventCallback, 0, 0,
_outputFormat, Guid.Empty);
//latency = (int)(_audioClient.StreamLatency / reftimesPerMillisecond);
}
}
}
catch (CoreAudioAPIException exception)
{
if (exception.ErrorCode == unchecked((int)0x88890019)) //AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED
{
const long reftimesPerSec = 10000000;
int framesInBuffer = _audioClient.GetBufferSize();
// ReSharper disable once PossibleLossOfFraction
latency = (int)(reftimesPerSec * framesInBuffer / _outputFormat.SampleRate + 0.5);
goto AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED_TRY_AGAIN;
}
throw;
}
if (_audioClient.StreamLatency != 0) //windows 10 returns zero, got no idea why => https://github.com/filoe/cscore/issues/11
{
Latency = (int)(_audioClient.StreamLatency / reftimesPerMillisecond);
}
if (_eventSync)
{
_eventWaitHandle = new EventWaitHandle(false, EventResetMode.AutoReset);
_audioClient.SetEventHandle(_eventWaitHandle.SafeWaitHandle.DangerousGetHandle());
}
_renderClient = AudioRenderClient.FromAudioClient(_audioClient);
}
private bool FeedBuffer(AudioRenderClient renderClient, byte[] buffer, int numFramesCount, int frameSize)
{
//calculate the number of bytes to "feed"
int count = numFramesCount * frameSize;
count -= (count % _source.WaveFormat.BlockAlign);
//if the driver did not request enough data, return true to continue playback
if (count <= 0)
return true;
//get the requested data
int read = _source.Read(buffer, 0, count);
//if the source did not provide enough data, we abort the playback by returning false
if (read <= 0)
return false;
//calculate the number of FRAMES to request
int actualNumFramesCount = read / frameSize;
//again there are some special requirements for exclusive mode AND eventsync
if (_shareMode == AudioClientShareMode.Exclusive && _eventSync &&
read < count)
{
/* The caller can request a packet size that is less than or equal to the amount
* of available space in the buffer (except in the case of an exclusive-mode stream
* that uses event-driven buffering; for more information, see IAudioClient::Initialize).
* see https://msdn.microsoft.com/en-us/library/windows/desktop/dd368243%28v=vs.85%29.aspx - remarks*/
//since we have to provide exactly the requested number of frames, we clear the rest of the array
Array.Clear(buffer, read, count - read);
//set the number of frames to request memory for, to the number of requested frames
actualNumFramesCount = numFramesCount;
}
IntPtr ptr = renderClient.GetBuffer(actualNumFramesCount);
//we may should introduce a try-finally statement here, but the Marshal.Copy method should not
//throw any relevant exceptions ... so we should be able to always release the packet
Marshal.Copy(buffer, 0, ptr, read);
renderClient.ReleaseBuffer(actualNumFramesCount, AudioClientBufferFlags.None);
return true;
}
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 && _audioClient.BasePtr != IntPtr.Zero)
{
try
{
_audioClient.StopNative();
_audioClient.Reset();
}
catch (CoreAudioAPIException ex)
{
if (ex.ErrorCode != unchecked((int)0x88890001)) //AUDCLNT_E_NOT_INITIALIZED
throw;
}
_audioClient.Dispose();
_audioClient = null;
}
if (_eventWaitHandle != null)
{
_eventWaitHandle.Close();
_eventWaitHandle = null;
}
_isInitialized = false;
}
private bool FeedBuffer(AudioRenderClient renderClient, byte[] buffer, int numFramesCount, int frameSize)
{
int count = numFramesCount * frameSize;
count -= (count % _source.WaveFormat.BlockAlign);
if (count <= 0)
return true;
int read = _source.Read(buffer, 0, count);
var ptr = renderClient.GetBuffer(numFramesCount);
Marshal.Copy(buffer, 0, ptr, read);
renderClient.ReleaseBuffer((int)(read / frameSize), AudioClientBufferFlags.None);
return read > 0;
}