public static void SetApplicationMute(int pid, bool mute)
{
Interfaces.ISimpleAudioVolume volume = GetVolumeObject(pid);
if (volume == null)
{
throw new Exception("No application found for pid");
}
Guid guid = Guid.Empty;
volume.SetMute(mute, guid);
Marshal.ReleaseComObject(volume);
}
public static void SetSystemSoundsMute(bool mute)
{
Interfaces.ISimpleAudioVolume volume = GetSystemSoundsVolumeObject();
if (volume == null)
{
throw new Exception("No session found for system sounds");
}
Guid guid = Guid.Empty;
volume.SetMute(mute, guid);
Marshal.ReleaseComObject(volume);
}
public static void SetApplicationVolume(int pid, float level)
{
Interfaces.ISimpleAudioVolume volume = GetVolumeObject(pid);
if (volume == null)
{
throw new Exception("No application found for pid");
}
Guid guid = Guid.Empty;
volume.SetMasterVolume(level / 100, guid);
Marshal.ReleaseComObject(volume);
}
public static bool?GetSystemSoundsMute()
{
Interfaces.ISimpleAudioVolume volume = GetSystemSoundsVolumeObject();
if (volume == null)
{
throw new Exception("No session found for system sounds");
}
bool mute;
volume.GetMute(out mute);
Marshal.ReleaseComObject(volume);
return(mute);
}
public static float?GetSystemSoundsVolume()
{
Interfaces.ISimpleAudioVolume volume = GetSystemSoundsVolumeObject();
if (volume == null)
{
throw new Exception("No session found for system sounds");
}
float level;
volume.GetMasterVolume(out level);
Marshal.ReleaseComObject(volume);
return(level * 100);
}
public static bool?GetApplicationMute(int pid)
{
Interfaces.ISimpleAudioVolume volume = GetVolumeObject(pid);
if (volume == null)
{
throw new Exception("No application found for pid");
}
bool mute;
volume.GetMute(out mute);
Marshal.ReleaseComObject(volume);
return(mute);
}
public static float?GetApplicationVolume(int pid)
{
Interfaces.ISimpleAudioVolume volume = GetVolumeObject(pid);
if (volume == null)
{
throw new Exception("No application found for pid");
}
float level;
volume.GetMasterVolume(out level);
Marshal.ReleaseComObject(volume);
return(level * 100);
}
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);
}
}
}
