private static Interfaces.IAudioEndpointVolume GetMasterVolumeObject()
{
Interfaces.IMMDeviceEnumerator deviceEnumerator = null;
Interfaces.IMMDevice speakers = null;
try
{
deviceEnumerator = (Interfaces.IMMDeviceEnumerator)(new Interfaces.MMDeviceEnumerator());
deviceEnumerator.GetDefaultAudioEndpoint(Interfaces.EDataFlow.eRender, Interfaces.ERole.eMultimedia, out speakers);
Guid IID_IAudioEndpointVolume = typeof(Interfaces.IAudioEndpointVolume).GUID;
object o;
speakers.Activate(IID_IAudioEndpointVolume, 0, IntPtr.Zero, out o);
Interfaces.IAudioEndpointVolume masterVol = (Interfaces.IAudioEndpointVolume)o;
return(masterVol);
}
finally
{
if (speakers != null)
{
Marshal.ReleaseComObject(speakers);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
}
}
private static Interfaces.IMMDevice GetSpeakers()
{
// get the speakers (1st render + multimedia) device
try
{
Interfaces.IMMDeviceEnumerator deviceEnumerator = (Interfaces.IMMDeviceEnumerator)(new Interfaces.MMDeviceEnumerator());
Interfaces.IMMDevice speakers;
deviceEnumerator.GetDefaultAudioEndpoint(Interfaces.EDataFlow.eRender, Interfaces.ERole.eMultimedia, out speakers);
return(speakers);
}
catch
{
return(null);
}
}
public static IList <AudioDevice> GetAllDevices()
{
List <AudioDevice> list = new List <AudioDevice>();
Interfaces.IMMDeviceEnumerator deviceEnumerator = null;
try
{
deviceEnumerator = (Interfaces.IMMDeviceEnumerator)(new Interfaces.MMDeviceEnumerator());
}
catch
{
}
if (deviceEnumerator == null)
{
return(list);
}
Interfaces.IMMDeviceCollection collection;
deviceEnumerator.EnumAudioEndpoints(Interfaces.EDataFlow.eAll, Interfaces.DEVICE_STATE.MASK_ALL, out collection);
if (collection == null)
{
return(list);
}
int count;
collection.GetCount(out count);
for (int i = 0; i < count; i++)
{
Interfaces.IMMDevice dev;
collection.Item(i, out dev);
if (dev != null)
{
list.Add(CreateDevice(dev));
}
}
return(list);
}
private static Interfaces.ISimpleAudioVolume GetSystemSoundsVolumeObject()
{
Interfaces.IMMDeviceEnumerator deviceEnumerator = null;
Interfaces.IAudioSessionEnumerator sessionEnumerator = null;
Interfaces.IAudioSessionManager2 mgr = null;
Interfaces.IMMDevice speakers = null;
try
{
// get the speakers (1st render + multimedia) device
deviceEnumerator = (Interfaces.IMMDeviceEnumerator)(new Interfaces.MMDeviceEnumerator());
deviceEnumerator.GetDefaultAudioEndpoint(Interfaces.EDataFlow.eRender, Interfaces.ERole.eMultimedia, out speakers);
// activate the session manager. we need the enumerator
Guid IID_IAudioSessionManager2 = typeof(Interfaces.IAudioSessionManager2).GUID;
object o;
speakers.Activate(IID_IAudioSessionManager2, 0, IntPtr.Zero, out o);
mgr = (Interfaces.IAudioSessionManager2)o;
// enumerate sessions for on this device
mgr.GetSessionEnumerator(out sessionEnumerator);
int count;
sessionEnumerator.GetCount(out count);
// search for an audio session with the required process-id
Interfaces.ISimpleAudioVolume volumeControl = null;
for (int i = 0; i < count; ++i)
{
Interfaces.IAudioSessionControl2 ctl = null;
try
{
sessionEnumerator.GetSession(i, out ctl);
ctl.GetDisplayName(out string val);
if (val.ToLower().Contains("@%systemroot%\\system32\\audiosrv.dll"))
{
volumeControl = ctl as Interfaces.ISimpleAudioVolume;
break;
}
}
finally
{
}
}
return(volumeControl);
}
finally
{
if (sessionEnumerator != null)
{
Marshal.ReleaseComObject(sessionEnumerator);
}
if (mgr != null)
{
Marshal.ReleaseComObject(mgr);
}
if (speakers != null)
{
Marshal.ReleaseComObject(speakers);
}
if (deviceEnumerator != null)
{
Marshal.ReleaseComObject(deviceEnumerator);
}
}
}
