/// <summary>
/// Creates a buffer for capturing waveform audio.
/// </summary>
/// <param name="capture">a reference to an instance of <see cref="DirectSoundCapture"/></param>
/// <param name="description">a <see cref="SharpDX.DirectSound.CaptureBufferDescription"/> structure containing values for the capture buffer being created. </param>
/// <returns>No documentation.</returns>
/// <unmanaged>HRESULT IDirectSoundCapture::CreateCaptureBuffer([In] LPCDSCBUFFERDESC pcDSCBufferDesc,[Out] LPDIRECTSOUNDCAPTUREBUFFER* ppDSCBuffer,[None] IUnknown* pUnkOuter)</unmanaged>
public CaptureBuffer(DirectSoundCapture capture, CaptureBufferDescription description) : base(IntPtr.Zero)
{
CaptureBufferBase captureBuffer;
capture.CreateCaptureBuffer(description, out captureBuffer, null);
using (captureBuffer)
{
NativePointer = captureBuffer.NativePointer;
QueryInterfaceFrom(this);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="T:SharpDX.DirectSound.FullDuplex" /> class.
/// </summary>
/// <param name="captureDevice" />
/// <param name="playbackDevice" />
/// <param name="captureDescription" />
/// <param name="bufferDescription" />
/// <param name="windowHandle" />
/// <param name="level" />
/// <param name="captureBuffer" />
/// <param name="secondaryBuffer" />
public FullDuplex(Guid captureDevice, Guid playbackDevice, CaptureBufferDescription captureDescription, SoundBufferDescription bufferDescription, IntPtr windowHandle, CooperativeLevel level, out CaptureBuffer captureBuffer, out SecondarySoundBuffer secondaryBuffer)
{
DSound.FullDuplexCreate(captureDevice, playbackDevice, captureDescription, bufferDescription, windowHandle, (int)level, this,
out captureBuffer, out secondaryBuffer, null);
}
/// <summary>
/// Worker thread.
/// </summary>
///
private void WorkerThread()
{
// Get the selected capture device
DirectSoundCapture captureDevice = new DirectSoundCapture(device);
// Set the capture format
var bitsPerSample = Signal.GetSampleSize(sampleFormat);
WaveFormat format = WaveFormat.CreateCustomFormat(sampleFormat.ToWaveFormat(), sampleRate, 1,
sampleRate * bitsPerSample / 8, bitsPerSample / 8, bitsPerSample);
// Setup the capture buffer
CaptureBufferDescription captureBufferDescription = new CaptureBufferDescription();
captureBufferDescription.Format = format;
captureBufferDescription.BufferBytes = 2 * desiredCaptureSize * format.BlockAlign;
captureBufferDescription.Flags |= CaptureBufferCapabilitiesFlags.WaveMapped;
captureBufferDescription.Flags &= ~CaptureBufferCapabilitiesFlags.ControlEffects;
CaptureBuffer captureBuffer = null;
NotificationPosition[] notifications = new NotificationPosition[2];
try
{
captureBuffer = new CaptureBuffer(captureDevice, captureBufferDescription);
// Setup the notification positions
int bufferPortionSize = captureBuffer.Capabilities.BufferBytes / 2;
notifications[0] = new NotificationPosition();
notifications[0].Offset = bufferPortionSize - 1;
notifications[0].WaitHandle = new AutoResetEvent(false);
notifications[1] = new NotificationPosition();
notifications[1].Offset = bufferPortionSize - 1 + bufferPortionSize;
notifications[1].WaitHandle = new AutoResetEvent(false);
captureBuffer.SetNotificationPositions(notifications);
// Make a copy of the wait handles
WaitHandle[] waitHandles = new WaitHandle[notifications.Length];
for (int i = 0; i < notifications.Length; i++)
waitHandles[i] = notifications[i].WaitHandle;
// Start capturing
captureBuffer.Start(true);
if (sampleFormat == SampleFormat.Format32BitIeeeFloat)
{
float[] currentSample = new float[desiredCaptureSize];
while (!stopEvent.WaitOne(0, true))
{
int bufferPortionIndex = WaitHandle.WaitAny(waitHandles);
captureBuffer.Read(currentSample, 0, currentSample.Length, bufferPortionSize * bufferPortionIndex, LockFlags.None);
OnNewFrame(currentSample);
}
}
else if (sampleFormat == SampleFormat.Format16Bit)
{
short[] currentSample = new short[desiredCaptureSize];
while (!stopEvent.WaitOne(0, true))
{
int bufferPortionIndex = WaitHandle.WaitAny(waitHandles);
captureBuffer.Read(currentSample, 0, currentSample.Length, bufferPortionSize * bufferPortionIndex, LockFlags.None);
OnNewFrame(currentSample);
}
}
}
catch (Exception ex)
{
if (AudioSourceError != null)
AudioSourceError(this, new AudioSourceErrorEventArgs(ex.Message));
else throw;
}
finally
{
if (captureBuffer != null)
{
captureBuffer.Stop();
captureBuffer.Dispose();
}
if (captureDevice != null)
captureDevice.Dispose();
for (int i = 0; i < notifications.Length; i++)
if (notifications[i].WaitHandle != null)
notifications[i].WaitHandle.Close();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="T:SharpDX.DirectSound.FullDuplex" /> class.
/// </summary>
/// <param name="captureDevice" />
/// <param name="playbackDevice" />
/// <param name="captureDescription" />
/// <param name="bufferDescription" />
/// <param name="windowHandle" />
/// <param name="level" />
/// <param name="captureBuffer" />
/// <param name="secondaryBuffer" />
public FullDuplex(Guid captureDevice, Guid playbackDevice, CaptureBufferDescription captureDescription, SoundBufferDescription bufferDescription, IntPtr windowHandle, CooperativeLevel level, out CaptureBuffer captureBuffer, out SecondarySoundBuffer secondaryBuffer)
{
DSound.FullDuplexCreate(captureDevice, playbackDevice, captureDescription, bufferDescription, windowHandle, (int) level, this,
out captureBuffer, out secondaryBuffer, null);
}