private bool OpenWaveIn()
{
if (_hWaveIn == IntPtr.Zero)
{
if (_isWaveInOpened == false)
{
var waveFormatEx = new Win32.WAVEFORMATEX
{
wFormatTag = (ushort)Win32.WaveFormatFlags.WAVE_FORMAT_PCM,
nChannels = (ushort)_channels,
nSamplesPerSec = (ushort)_samplesPerSecond,
wBitsPerSample = (ushort)_bitsPerSample
};
waveFormatEx.nBlockAlign = (ushort)((waveFormatEx.wBitsPerSample * waveFormatEx.nChannels) >> 3);
waveFormatEx.nAvgBytesPerSec = waveFormatEx.nBlockAlign * waveFormatEx.nSamplesPerSec;
var deviceId = WinSound.GetWaveInDeviceIdByName(_waveInDeviceName);
Win32.waveInOpen(ref _hWaveIn, deviceId, ref waveFormatEx, _delegateWaveInProc, 0, (int)Win32.WaveProcFlags.CALLBACK_FUNCTION);
if (_hWaveIn == IntPtr.Zero)
{
return(false);
}
GCHandle.Alloc(_hWaveIn, GCHandleType.Pinned);
}
}
_isWaveInOpened = true;
return(true);
}
/// <summary>
/// OpenWaveIn
/// </summary>
/// <returns></returns>
private bool OpenWaveIn()
{
if (hWaveIn == IntPtr.Zero)
{
//Wenn nicht schon offen
if (IsWaveInOpened == false)
{
//Format bestimmen
var waveFormatEx = new Win32.WAVEFORMATEX();
waveFormatEx.wFormatTag = (ushort)Win32.WaveFormatFlags.WAVE_FORMAT_PCM;
waveFormatEx.nChannels = (ushort)Channels;
waveFormatEx.nSamplesPerSec = (ushort)SamplesPerSecond;
waveFormatEx.wBitsPerSample = (ushort)BitsPerSample;
waveFormatEx.nBlockAlign = (ushort)((waveFormatEx.wBitsPerSample * waveFormatEx.nChannels) >> 3);
waveFormatEx.nAvgBytesPerSec = waveFormatEx.nBlockAlign * waveFormatEx.nSamplesPerSec;
//WaveIn Gerät ermitteln
var deviceId = WinSound.GetWaveInDeviceIdByName(WaveInDeviceName);
//WaveIn Gerät öffnen
var hr = Win32.waveInOpen(ref hWaveIn, deviceId, ref waveFormatEx, delegateWaveInProc, 0,
(int)Win32.WaveProcFlags.CALLBACK_FUNCTION);
//Wenn nicht erfolgreich
if (hWaveIn == IntPtr.Zero)
{
IsWaveInOpened = false;
return(false);
}
//Handle sperren
GCHandle.Alloc(hWaveIn, GCHandleType.Pinned);
}
}
IsWaveInOpened = true;
return(true);
}