/// <summary>
/// Creates a new Wave input stream
/// </summary>
/// <param name="deviceNumber">The device to open - 0 is default</param>
/// <param name="desiredFormat">The PCM format to record in</param>
/// <param name="callbackWindow">If this parameter is non-null, the Wave In Messages
/// will be sent to the message loop of the supplied control. This is considered a
/// safer way to use the waveIn functionality</param>
public WaveInStream(int deviceNumber, WaveFormat desiredFormat, Control callbackWindow)
{
waveFormat = desiredFormat;
callback = Callback;
if (callbackWindow == null)
{
MmException.Try(
WaveInterop.waveInOpen(out waveInHandle, (IntPtr)deviceNumber, desiredFormat, callback, IntPtr.Zero,
WaveInterop.CallbackFunction), "waveInOpen");
}
else
{
waveInWindow = new WaveWindowNative(callback);
MmException.Try(
WaveInterop.waveInOpenWindow(out waveInHandle, (IntPtr)deviceNumber, desiredFormat, callbackWindow.Handle,
IntPtr.Zero, WaveInterop.CallbackWindow), "waveInOpen");
waveInWindow.AssignHandle(callbackWindow.Handle);
}
// Default to three buffers of 100ms each
int bufferSize = desiredFormat.AverageBytesPerSecond / 10;
numBuffers = 3;
buffers = new WaveInBuffer[numBuffers];
for (int n = 0; n < numBuffers; n++)
{
buffers[n] = new WaveInBuffer(waveInHandle, bufferSize);
}
}
/// <summary>
/// Dispose pattern
/// </summary>
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (recording)
{
StopRecording();
}
if (buffers != null)
{
for (int n = 0; n < numBuffers; n++)
{
buffers[n].Dispose();
}
buffers = null;
}
WaveInterop.waveInClose(waveInHandle);
waveInHandle = IntPtr.Zero;
if (waveInWindow != null)
{
waveInWindow.ReleaseHandle();
waveInWindow = null;
}
}
base.Dispose(disposing);
}
internal void Connect(WaveInterop.WaveCallback callback)
{
if (Strategy == WaveCallbackStrategy.NewWindow)
{
waveOutWindow = new WaveWindow(callback);
waveOutWindow.CreateControl();
this.Handle = waveOutWindow.Handle;
}
else if (Strategy == WaveCallbackStrategy.ExistingWindow)
{
waveOutWindowNative = new WaveWindowNative(callback);
waveOutWindowNative.AssignHandle(this.Handle);
}
}
internal void Disconnect()
{
if (waveOutWindow != null)
{
waveOutWindow.Close();
waveOutWindow = null;
}
if (waveOutWindowNative != null)
{
waveOutWindowNative.ReleaseHandle();
waveOutWindowNative = null;
}
}
