private static IAudioEndpointVolume GetMasterVolumeObject()
{
IMMDeviceEnumerator deviceEnumerator = null;
IMmDevice speakers = null;
try
{
deviceEnumerator = MmDeviceEnumeratorFactory.CreateInstance();
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.ERender, ERole.EMultimedia, out speakers);
var IID_IAudioEndpointVolume = typeof(IAudioEndpointVolume).GUID;
object o;
speakers.Activate(ref IID_IAudioEndpointVolume, 0, IntPtr.Zero, out o);
IAudioEndpointVolume masterVol = (IAudioEndpointVolume)o;
return(masterVol);
}
finally
{
if (speakers != null)
{
Marshal.ReleaseComObject(speakers);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
}
}
public static IEnumerable <IAudioSessionControl2> EnumerateApplications()
{
// get the speakers (1st render + multimedia) device
var deviceEnumerator = MmDeviceEnumeratorFactory.CreateInstance();
deviceEnumerator.GetDefaultAudioEndpoint(EDataFlow.ERender, ERole.EMultimedia, out IMmDevice speakers);
// activate the session manager. we need the enumerator
var iidIAudioSessionManager2 = typeof(IAudioSessionManager2).GUID;
speakers.Activate(ref iidIAudioSessionManager2, 0, IntPtr.Zero, out object o);
var mgr = (IAudioSessionManager2)o;
// enumerate sessions for on this device
mgr.GetSessionEnumerator(out IAudioSessionEnumerator sessionEnumerator);
sessionEnumerator.GetCount(out int count);
for (var i = 0; i < count; i++)
{
sessionEnumerator.GetSession(i, out IAudioSessionControl ctl);
var ctl2 = ctl as IAudioSessionControl2;
if (ctl2 != null)
{
yield return(ctl2);
}
if (ctl != null)
{
Marshal.ReleaseComObject(ctl);
}
if (ctl2 != null)
{
Marshal.ReleaseComObject(ctl2);
}
}
Marshal.ReleaseComObject(sessionEnumerator);
Marshal.ReleaseComObject(mgr);
Marshal.ReleaseComObject(speakers);
Marshal.ReleaseComObject(deviceEnumerator);
}