unsafe void AllocateHeaders()
{
if (this._hwih == IntPtr.Zero)
{
throw new InvalidOperationException();
}
for (int i = 0; i < _headers.Length; i++)
{
if (_headers[i] == IntPtr.Zero)
{
WaveHeader *pwh = (WaveHeader *)Marshal.AllocHGlobal(Marshal.SizeOf(typeof(WaveHeader)));
(*pwh).dwFlags = 0;
(*pwh).dwBufferLength = _cc
* _wfx.nBlockAlign;
(*pwh).lpData = Marshal.AllocHGlobal((*pwh).dwBufferLength);
(*pwh).dwUser = IntPtr.Zero;
_headers[i] = (IntPtr)pwh;
WinMM.Throw(
WinMM.waveInPrepareHeader(this._hwih, _headers[i], Marshal.SizeOf(typeof(WaveHeader))),
WinMM.ErrorSource.WaveOut);
WinMM.Throw(
WinMM.waveInAddBuffer(this._hwih, _headers[i], Marshal.SizeOf(typeof(WaveHeader))),
WinMM.ErrorSource.WaveOut);
}
}
}
Mic32 OpenMic()
{
var hMic32 = new Microsoft.WinMM.Mic32(1024, 44100, (hMic, hWaveHeader) => {
WaveHeader *pwh = (WaveHeader *)hWaveHeader;
if (pwh != null)
{
short *psData =
(short *)((*pwh).lpData);
hMic.CaptureData(pwh, psData);
if (pwh != null)
{
(*pwh).dwFlags = (*pwh).dwFlags & ~WaveHeaderFlags.Done;
}
WinMM.Throw(
WinMM.waveInAddBuffer(hMic.Handle, hWaveHeader, Marshal.SizeOf(typeof(WaveHeader))),
WinMM.ErrorSource.WaveIn);
}
PostWinMMMessage(hMic, hWaveHeader);
});
try {
hMic32.Open(false);
} catch (Exception e) {
Console.Error?.WriteLine(e);
hMic32.Dispose();
return(null);
}
return(hMic32);
}
public void Open(bool startmMuted = true)
{
const int WaveInMapperDeviceId = -1;
if (this._hwih != IntPtr.Zero)
{
throw new InvalidOperationException("The device is already open.");
}
IntPtr h = new IntPtr();
WinMM.Throw(
WinMM.waveInOpen(
ref h,
WaveInMapperDeviceId,
ref _wfx,
this._hwiproc,
(IntPtr)0,
WinMM.WaveOpenFlags.CALLBACK_FUNCTION | WinMM.WaveOpenFlags.WAVE_FORMAT_DIRECT),
WinMM.ErrorSource.WaveIn);
this._hwih = h;
this.AllocateHeaders();
_isMuted = true;
if (!startmMuted)
{
UnMute();
}
}
