private void ReloadAudioDevices()
{
if (_reloadDevicesInProgress)
{
return;
}
MMErrors errorCode = 0;
IntPtr hMixer = IntPtr.Zero;
try
{
_reloadDevicesInProgress = true;
var newAudioDevices = new List <AudioDeviceDescriptor>();
MIXERCAPS wic = new MIXERCAPS();
int iNumDevs = MixerNative.mixerGetNumDevs();
for (int i = 0; i < iNumDevs; i++)
{
// Get info about the next device
errorCode = (MMErrors)MixerNative.mixerGetDevCaps(i, ref wic, Marshal.SizeOf(wic));
if (errorCode != MMErrors.MMSYSERR_NOERROR)
{
throw new MixerException(errorCode, GetErrorDescription(FuncName.fnMixerGetDevCaps, errorCode));
}
errorCode = (MMErrors)MixerNative.mixerOpen(out hMixer, i, IntPtr.Zero, IntPtr.Zero, 0);
if (errorCode != MMErrors.MMSYSERR_NOERROR)
{
throw new MixerException(errorCode, GetErrorDescription(FuncName.fnMixerOpen, errorCode));
}
MIXERLINE mxl = new MIXERLINE();
mxl.cbStruct = (uint)Marshal.SizeOf(mxl);
var deviceDescriptor = new AudioDeviceDescriptor()
{
DeviceId = i,
Name = wic.szPname
};
foreach (var mixerlineComponenttype in AudioDevice.RecordingLineTypes)
{
mxl.dwComponentType = mixerlineComponenttype;
if (MixerNative.mixerGetLineInfo(hMixer, ref mxl, MIXER_GETLINEINFOF.COMPONENTTYPE) == 0)
{
deviceDescriptor.RecordingSupport = true;
deviceDescriptor.RecordingComponentType = mixerlineComponenttype;
break;
}
}
foreach (var mixerlineComponenttype in AudioDevice.PlaybackLineTypes)
{
mxl.dwComponentType = mixerlineComponenttype;
if (MixerNative.mixerGetLineInfo(hMixer, ref mxl, MIXER_GETLINEINFOF.COMPONENTTYPE) == 0)
{
deviceDescriptor.PlaybackSupport = true;
deviceDescriptor.PlaybackComponentType = mixerlineComponenttype;
break;
}
}
if (deviceDescriptor.PlaybackSupport || deviceDescriptor.RecordingSupport)
{
if (deviceDescriptor.PlaybackSupport && deviceDescriptor.RecordingSupport)
{
var playbackDeviceDescriptor = new AudioDeviceDescriptor()
{
DeviceId = deviceDescriptor.DeviceId,
Name = deviceDescriptor.Name,
PlaybackSupport = true,
RecordingSupport = false,
PlaybackComponentType = deviceDescriptor.PlaybackComponentType
};
var recordingDeviceDescriptor = new AudioDeviceDescriptor()
{
DeviceId = deviceDescriptor.DeviceId,
Name = deviceDescriptor.Name,
PlaybackSupport = false,
RecordingSupport = true,
RecordingComponentType = deviceDescriptor.RecordingComponentType
};
newAudioDevices.Add(playbackDeviceDescriptor);
newAudioDevices.Add(recordingDeviceDescriptor);
}
else
{
newAudioDevices.Add(deviceDescriptor);
}
}
}
if (newAudioDevices.Count > 0 || (_audioDevices.Count > 0 && iNumDevs == 0))
{
UpdateAudioDevicesLists(newAudioDevices);
}
}
finally
{
if (hMixer != IntPtr.Zero)
{
MixerNative.mixerClose(hMixer);
}
_reloadDevicesInProgress = false;
}
}
private AudioDevice GetDefaultDevice(MixerType mixerType)
{
MMErrors errorCode = 0;
IntPtr hWave = IntPtr.Zero;
IntPtr hMixer = IntPtr.Zero;
try
{
WAVEFORMATEX waveFormat = WAVEFORMATEX.Empty;
waveFormat.formatTag = WaveFormatTag.PCM;
waveFormat.nChannels = 1;
waveFormat.nSamplesPerSec = 8000;
waveFormat.wBitsPerSample = 8;
waveFormat.nBlockAlign = (short)(waveFormat.nChannels * (waveFormat.wBitsPerSample / 8));
waveFormat.nAvgBytesPerSec = waveFormat.nSamplesPerSec * waveFormat.nBlockAlign;
waveFormat.cbSize = 0;
// Get default mixer HWND
if (mixerType == MixerType.Recording)
{
errorCode = (MMErrors)WaveNative.waveInOpen(out hWave, WaveNative.WAVE_MAPPER, ref waveFormat, CallbackForm.Handle, IntPtr.Zero, (int)CallBackFlag.CALLBACK_WINDOW);
}
else if (mixerType == MixerType.Playback)
{
errorCode = (MMErrors)WaveNative.waveOutOpen(out hWave, WaveNative.WAVE_MAPPER, ref waveFormat, CallbackForm.Handle, IntPtr.Zero, (int)CallBackFlag.CALLBACK_WINDOW);
}
if (errorCode != MMErrors.MMSYSERR_NOERROR)
{
// TODO: Log error!!!
//throw new MixerException(errorCode, Audio.GetErrorDescription(FuncName.fnWaveInOpen, errorCode));
return(null);
}
if (mixerType == MixerType.Recording)
{
errorCode = (MMErrors)MixerNative.mixerOpen(out hMixer, hWave, IntPtr.Zero, IntPtr.Zero, ((uint)MIXER_OBJECTFLAG.HWAVEIN));
}
else if (mixerType == MixerType.Playback)
{
errorCode = (MMErrors)MixerNative.mixerOpen(out hMixer, hWave, IntPtr.Zero, IntPtr.Zero, ((uint)MIXER_OBJECTFLAG.HWAVEOUT));
}
if (errorCode != MMErrors.MMSYSERR_NOERROR)
{
// TODO: Log error!!!
//throw new MixerException(errorCode, Mixers.GetErrorDescription(FuncName.fnMixerOpen, errorCode));
return(null);
}
int deviceId = -1;
errorCode = (MMErrors)MixerNative.mixerGetID(hMixer, ref deviceId, MIXER_OBJECTFLAG.MIXER);
if (errorCode != MMErrors.MMSYSERR_NOERROR)
{
// TODO: Log error!!!
//throw new MixerException(errorCode, Mixers.GetErrorDescription(FuncName.fnMixerGetID, errorCode));
return(null);
}
MIXERCAPS wic = new MIXERCAPS();
errorCode = (MMErrors)MixerNative.mixerGetDevCaps(deviceId, ref wic, Marshal.SizeOf(wic));
if (errorCode != MMErrors.MMSYSERR_NOERROR)
{
// TODO: Log error!!!
//throw new MixerException(errorCode, GetErrorDescription(FuncName.fnMixerGetDevCaps, errorCode));
return(null);
}
return(GetAudioDeviceByName(wic.szPname, mixerType == MixerType.Playback));
}
finally
{
if (hMixer != IntPtr.Zero)
{
MixerNative.mixerClose(hMixer);
}
if (hWave != IntPtr.Zero && mixerType == MixerType.Playback)
{
WaveNative.waveOutClose(hWave);
}
if (hWave != IntPtr.Zero && mixerType == MixerType.Recording)
{
WaveNative.waveInClose(hWave);
}
}
}