/// <summary>
/// Returns the system's default audio output device. Returns null if no default audio output device is present. See also: Player.Audio.GetDevices.
/// </summary>
public AudioDevice GetDefaultDevice()
{
AudioDevice audioDevice = null;
IMMDeviceEnumerator deviceEnumerator = (IMMDeviceEnumerator) new MMDeviceEnumerator();
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out IMMDevice device);
Marshal.ReleaseComObject(deviceEnumerator);
if (device != null)
{
audioDevice = new AudioDevice();
Player.GetDeviceInfo(device, audioDevice);
Marshal.ReleaseComObject(device);
_base._lastError = Player.NO_ERROR;
}
else
{
_base._lastError = HResult.MF_E_NO_AUDIO_PLAYBACK_DEVICE;
}
return(audioDevice);
}
// ******************************** Audio Devices - Audio Output Peak Meter - Open / Close / GetValues
#region Audio Devices - Audio Output Peak Meter - Open / Close / GetValues
internal bool PeakMeter_Open(AudioDevice device, bool change)
{
if (!pm_HasPeakMeter || change)
{
IMMDeviceEnumerator deviceEnumerator = null;
IMMDevice levelDevice = null;
if (pm_HasPeakMeter)
{
PeakMeter_Close();
}
try
{
deviceEnumerator = (IMMDeviceEnumerator) new MMDeviceEnumerator();
if (device == null)
{
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia, out levelDevice);
}
else
{
deviceEnumerator.GetDevice(device._id, out levelDevice);
}
if (levelDevice != null)
{
levelDevice.Activate(ref IID_IAudioMeterInformation, 3, IntPtr.Zero, out object levelDeviceInfo);
pm_PeakMeterInfo = (IAudioMeterInformation)levelDeviceInfo;
pm_PeakMeterInfo.GetMeteringChannelCount(out pm_PeakMeterChannelCount);
if (pm_PeakMeterChannelCount > MAX_AUDIO_CHANNELS)
{
pm_PeakMeterChannelCount = MAX_AUDIO_CHANNELS;
}
if (pm_PeakMeterValues == null)
{
pm_PeakMeterValues = new float[MAX_AUDIO_CHANNELS];
pm_PeakMeterValuesStop = new float[MAX_AUDIO_CHANNELS];
for (int i = 0; i < MAX_AUDIO_CHANNELS; i++)
{
pm_PeakMeterValuesStop[i] = STOP_VALUE;
}
}
pm_HasPeakMeter = true;
StartSystemDevicesChangedHandlerCheck();
}
}
catch { /* ignore */
}
if (levelDevice != null)
{
Marshal.ReleaseComObject(levelDevice);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
}
return(pm_HasPeakMeter);
}
