private void ProcessAudioData(WaveBuffer wbuf)
{
try
{
if (_waveInput.GetDeviceStatus() == WaveStatus.waveStarted)
{
ComputeFFT(wbuf);
int mmr = _waveInput.PrepareBuffer(wbuf);
WaveInStatus.ThrowExceptionForHR(mmr);
mmr = _waveInput.AddBuffer(wbuf);
WaveInStatus.ThrowExceptionForHR(mmr);
Interlocked.Increment(ref _numOutBuffers);
}
}
catch (Exception ex) // COMException, SystemException (waveinput)
{
DumpDebugMessage(ex.Message);
}
}
public int UnprepareBuffer(WaveBuffer wbuf)
{
int mmr = WaveConstants.MMSYSERR_INVALHANDLE;
if (IsOpen())
{
mmr = WaveOutput.waveOutUnprepareHeader(_hWaveOut, ref wbuf.whdr, WaveBuffer.Size);
}
return mmr;
}
public void ProcessEvent(IWaveDevice waveDevice, int uMsg, WaveBuffer wbuf)
{
if (waveDevice == _waveInput)
{
switch (uMsg)
{
case WaveConstants.MM_WIM_OPEN:
DumpDebugMessage("Wave Opened");
break;
case WaveConstants.MM_WIM_DATA:
{
GCHandle gch = GCHandle.Alloc(wbuf);
// Create message
if (this.IsHandleCreated)
{
Message m = Message.Create(_CopyWindowHandle, WM_AUDIO_DONE, IntPtr.Zero, (IntPtr)gch);
WndProcCallback wndCallback = new WndProcCallback(WndProc);
// Ensure all calls will be thread-safe
this.BeginInvoke(wndCallback, m);
}
}
break;
case WaveConstants.MM_WIM_CLOSE:
DumpDebugMessage("Wave Closed");
break;
}
}
}
public int AddBuffer(WaveBuffer wbuf)
{
int mmr = WaveConstants.MMSYSERR_INVALHANDLE;
if (IsOpen())
{
mmr = WaveOutput.waveOutWrite(_hWaveOut, ref wbuf.whdr, WaveBuffer.Size);
if (mmr == WaveConstants.MMSYSERR_NOERROR)
{
Interlocked.Increment(ref _currentKey);
wbuf.UserData = _currentKey;
_AudioBuffers[_currentKey] = wbuf;
}
}
return mmr;
}
