private void ReadData(byte[] buffer, AudioCaptureClient captureClient, uint frameSize)
{
int nextPacketSize = captureClient.GetNextPacketSize();
int read = 0;
int offset = 0;
while (nextPacketSize != 0)
{
int framesAvailable;
AudioClientBufferFlags flags;
IntPtr nativeBuffer = captureClient.GetBuffer(out framesAvailable, out flags);
int bytesAvailable = (int)(framesAvailable * frameSize);
int bytesToCopy = Math.Min(bytesAvailable, buffer.Length);
if (Math.Max(buffer.Length - read, 0) < bytesAvailable && read > 0)
{
RaiseDataAvailable(buffer, 0, read);
read = offset = 0;
}
if ((flags & AudioClientBufferFlags.Silent) == AudioClientBufferFlags.Silent)
{
Array.Clear(buffer, offset, bytesToCopy);
}
else
{
Marshal.Copy(nativeBuffer, buffer, offset, bytesToCopy);
}
read += bytesToCopy;
offset += bytesToCopy;
captureClient.ReleaseBuffer(framesAvailable);
nextPacketSize = captureClient.GetNextPacketSize();
}
RaiseDataAvailable(buffer, 0, read);
}
private void UninitializeAudioClients()
{
if (_audioClient != null)
{
_audioClient.Dispose();
_audioClient = null;
}
if (_audioCaptureClient != null)
{
_audioCaptureClient.Dispose();
_audioCaptureClient = null;
}
if(_eventWaitHandle != null)
{
_eventWaitHandle.Close();
_eventWaitHandle = null;
}
_isInitialized = false;
}
private void InitializeInternal()
{
var defaultFormat = _waveFormat;
_audioClient = AudioClient.FromMMDevice(Device);
/*if (_shareMode == AudioClientShareMode.Exclusive)
{
_waveFormat = _waveFormat ?? _audioClient.MixFormat;
}
else
{
_waveFormat = _waveFormat ?? _audioClient.MixFormat;
}*/
_waveFormat = _waveFormat ?? _audioClient.MixFormat;
_waveFormat = SetupWaveFormat(_waveFormat, _audioClient);
if (!_eventSync)
{
_audioClient.Initialize(_shareMode, AudioClientStreamFlags.None | GetStreamFlags(), _latency * ReftimesPerMillisecond, 0, _waveFormat, Guid.Empty);
}
else
{
if (_shareMode == AudioClientShareMode.Exclusive)
{
try
{
_audioClient.Initialize(_shareMode, AudioClientStreamFlags.StreamFlagsEventCallback | GetStreamFlags(), _latency * ReftimesPerMillisecond, _latency * ReftimesPerMillisecond, _waveFormat, Guid.Empty);
}
catch (CoreAudioAPIException e)
{
if (e.ErrorCode == unchecked((int)0x88890019)) //AUDCLNT_E_BUFFER_SIZE_NOT_ALIGNED
{
int bufferSize = _audioClient.BufferSize;
_audioClient.Dispose();
long hnsRequestedDuration = (long)(((double)ReftimesPerMillisecond * 1000 / _waveFormat.SampleRate * bufferSize) + 0.5);
_audioClient = AudioClient.FromMMDevice(Device);
if (defaultFormat == null)
_waveFormat = _audioClient.MixFormat;
_audioClient.Initialize(_shareMode, AudioClientStreamFlags.StreamFlagsEventCallback | GetStreamFlags(), hnsRequestedDuration, hnsRequestedDuration, _waveFormat, Guid.Empty);
}
}
}
else
{
_audioClient.Initialize(_shareMode, AudioClientStreamFlags.StreamFlagsEventCallback | GetStreamFlags(), 0, 0, _waveFormat, Guid.Empty);
if(_audioClient.StreamLatency > 0)
{
_latency = (int) (_audioClient.StreamLatency / ReftimesPerMillisecond);
}
}
_eventWaitHandle = new EventWaitHandle(false, EventResetMode.AutoReset);
_audioClient.SetEventHandle(_eventWaitHandle.SafeWaitHandle.DangerousGetHandle());
}
_audioCaptureClient = AudioCaptureClient.FromAudioClient(_audioClient);
}