public DXWavePlayer(int device, int BufferByteSize, DataRequestDelegate fillProc)
{
if (BufferByteSize < 1000)
{
throw new ArgumentOutOfRangeException("BufferByteSize", "minimal size of buffer is 1000 bytes");
}
_buffersize = BufferByteSize;
_requestproc = fillProc;
var devices = DirectSound.GetDevices();
if (device <= 0 || device >= devices.Count)
{
device = 0;
}
_outputDevice = new DirectSound(devices[device].DriverGuid);
System.Windows.Interop.WindowInteropHelper wh = new System.Windows.Interop.WindowInteropHelper(Application.Current.MainWindow);
_outputDevice.SetCooperativeLevel(wh.Handle, CooperativeLevel.Priority);
_buffDescription = new SoundBufferDescription();
_buffDescription.Flags = BufferFlags.ControlPositionNotify | BufferFlags.ControlFrequency | BufferFlags.ControlEffects | BufferFlags.GlobalFocus | BufferFlags.GetCurrentPosition2;
_buffDescription.BufferBytes = BufferByteSize * InternalBufferSizeMultiplier;
WaveFormat format = new WaveFormat(16000, 16, 1);
_buffDescription.Format = format;
_soundBuffer = new SecondarySoundBuffer(_outputDevice, _buffDescription);
_synchronizer = new AutoResetEvent(false);
NotificationPosition[] nots = new NotificationPosition[InternalBufferSizeMultiplier];
NotificationPosition not;
int bytepos = 800;
for (int i = 0; i < InternalBufferSizeMultiplier; i++)
{
not = new NotificationPosition();
not.Offset = bytepos;
not.WaitHandle = _synchronizer;
nots[i] = not;
bytepos += BufferByteSize;
}
_soundBuffer.SetNotificationPositions(nots);
_waitThread = new Thread(new ThreadStart(DataRequestThread)) { Name = "MyWavePlayer.DataRequestThread" };
_waitThread.Start();
}
private void PlayFile(FileInfo FI)
{
lock (this) {
if (this.DS == null) {
this.DS = new DirectSound();
this.DS.SetCooperativeLevel(this.Handle, CooperativeLevel.Normal);
}
this.StopPlayback();
var bd = new SoundBufferDescription {
Format = new WaveFormat(FI.AudioFile.SampleRate, 16, FI.AudioFile.Channels),
BufferBytes = this.AudioBufferSize,
Flags = BufferFlags.GlobalFocus | BufferFlags.StickyFocus | BufferFlags.ControlVolume | BufferFlags.GetCurrentPosition2 | BufferFlags.ControlPositionNotify
};
this.CurrentBuffer = new SecondarySoundBuffer(this.DS, bd);
if (this.AudioUpdateTrigger == null)
this.AudioUpdateTrigger = new AutoResetEvent(false);
var chunkSize = this.AudioBufferSize / this.AudioBufferMarkers;
var updatePositions = new NotificationPosition[this.AudioBufferMarkers];
for (var i = 0; i < this.AudioBufferMarkers; ++i) {
updatePositions[i] = new NotificationPosition() {
WaitHandle = this.AudioUpdateTrigger,
Offset = chunkSize * i
};
}
this.CurrentBuffer.SetNotificationPositions(updatePositions);
this.CurrentStream = FI.AudioFile.OpenStream();
{
var bytes = new byte[this.CurrentBuffer.Capabilities.BufferBytes];
var readbytes = this.CurrentStream.Read(bytes, 0, this.CurrentBuffer.Capabilities.BufferBytes);
if (readbytes < this.CurrentBuffer.Capabilities.BufferBytes)
Array.Clear(bytes, readbytes, this.CurrentBuffer.Capabilities.BufferBytes - readbytes);
DataStream audiodata2;
var audiodata1 = this.CurrentBuffer.Lock(0, this.CurrentBuffer.Capabilities.BufferBytes, LockFlags.EntireBuffer, out audiodata2);
audiodata1.Write(bytes, 0, this.CurrentBuffer.Capabilities.BufferBytes);
this.CurrentBuffer.Unlock(audiodata1, audiodata2);
}
if (this.CurrentStream.Position < this.CurrentStream.Length) {
this.AudioUpdateTrigger.Reset();
this.AudioUpdateThread = new Thread(this.AudioUpdate);
this.AudioUpdateThread.Start();
this.btnPause.Enabled = true;
this.btnStop.Enabled = true;
this.AudioIsLooping = true;
}
else {
this.CurrentStream.Close();
this.CurrentStream = null;
this.AudioIsLooping = false;
}
this.CurrentBuffer.Play(0, (this.AudioIsLooping ? PlayFlags.Looping : PlayFlags.None));
}
}
/// <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();
}
}
