protected override void WndProc(ref Message m)
{
WaveInterop.WaveMessage message = (WaveInterop.WaveMessage)m.Msg;
switch (message)
{
case WaveInterop.WaveMessage.WaveOutDone:
case WaveInterop.WaveMessage.WaveInData:
IntPtr hOutputDevice = m.WParam;
WaveHeader waveHeader = new WaveHeader();
Marshal.PtrToStructure(m.LParam, waveHeader);
waveCallback(hOutputDevice, message, IntPtr.Zero, waveHeader, IntPtr.Zero);
break;
case WaveInterop.WaveMessage.WaveOutOpen:
case WaveInterop.WaveMessage.WaveOutClose:
case WaveInterop.WaveMessage.WaveInClose:
case WaveInterop.WaveMessage.WaveInOpen:
waveCallback(m.WParam, message, IntPtr.Zero, null, IntPtr.Zero);
break;
default:
base.WndProc(ref m);
break;
}
}
private GCHandle hThis; // for the user callback
/// <summary>
/// creates a new wavebuffer
/// </summary>
/// <param name="waveInHandle">WaveIn device to write to</param>
/// <param name="bufferSize">Buffer size in bytes</param>
public WaveInBuffer(IntPtr waveInHandle, Int32 bufferSize)
{
this.bufferSize = bufferSize;
this.buffer = new byte[bufferSize];
this.hBuffer = GCHandle.Alloc(buffer, GCHandleType.Pinned);
this.waveInHandle = waveInHandle;
header = new WaveHeader();
hHeader = GCHandle.Alloc(header, GCHandleType.Pinned);
header.dataBuffer = hBuffer.AddrOfPinnedObject();
header.bufferLength = bufferSize;
header.loops = 1;
hThis = GCHandle.Alloc(this);
header.userData = (IntPtr)hThis;
MmException.Try(WaveInterop.waveInPrepareHeader(waveInHandle, header, Marshal.SizeOf(header)), "waveInPrepareHeader");
//MmException.Try(WaveInterop.waveInAddBuffer(waveInHandle, header, Marshal.SizeOf(header)), "waveInAddBuffer");
}
public static extern MmResult waveOutWrite(IntPtr hWaveOut, WaveHeader lpWaveOutHdr, int uSize);
public static extern MmResult waveOutUnprepareHeader(IntPtr hWaveOut, WaveHeader lpWaveOutHdr, int uSize);
public static extern MmResult waveInPrepareHeader(IntPtr hWaveIn, WaveHeader lpWaveInHdr, int uSize);
public static extern MmResult waveInAddBuffer(IntPtr hWaveIn, WaveHeader pwh, int cbwh);