private static T GetCoreAudioObject <T>(int pid)
{
IMMDevice speakers = VolumeMixer.GetOutputDevice();
IAudioSessionManager2 mgr = VolumeMixer.GetOutputDeviceSessionManager(speakers);
IAudioSessionEnumerator sessionEnumerator = VolumeMixer.GetOutputDeviceSessionEnumerator(mgr);
int count;
sessionEnumerator.GetCount(out count);
dynamic volumeControl = null;
for (int i = 0; i < count; i++)
{
IAudioSessionControl2 ctl;
sessionEnumerator.GetSession(i, out ctl);
int cpid;
ctl.GetProcessId(out cpid);
if (cpid == pid)
{
volumeControl = (T)ctl;
break;
}
Marshal.ReleaseComObject(ctl);
}
Marshal.ReleaseComObject(sessionEnumerator);
Marshal.ReleaseComObject(mgr);
Marshal.ReleaseComObject(speakers);
return(volumeControl);
}
public static float?GetApplicationPeak(int pid)
{
IAudioMeterInformation meter = VolumeMixer.GetCoreAudioObject <IAudioMeterInformation>(pid);
if (meter == null)
{
return(null);
}
float peak;
meter.GetPeakValue(out peak);
return(peak);
}
public static void SetApplicationMute(int pid, bool mute)
{
ISimpleAudioVolume volume = VolumeMixer.GetCoreAudioObject <ISimpleAudioVolume>(pid);
if (volume == null)
{
return;
}
Guid guid = Guid.Empty;
volume.SetMute(mute, ref guid);
Marshal.ReleaseComObject(volume);
}
public static void SetApplicationVolume(int pid, float level)
{
ISimpleAudioVolume volume = VolumeMixer.GetCoreAudioObject <ISimpleAudioVolume>(pid);
if (volume == null)
{
return;
}
Guid guid = Guid.Empty;
volume.SetMasterVolume(level / 100, ref guid);
Marshal.ReleaseComObject(volume);
}
public static bool?GetApplicationMute(int pid)
{
ISimpleAudioVolume volume = VolumeMixer.GetCoreAudioObject <ISimpleAudioVolume>(pid);
if (volume == null)
{
return(null);
}
bool mute;
volume.GetMute(out mute);
Marshal.ReleaseComObject(volume);
return(mute);
}
public static float?GetApplicationVolume(int pid)
{
ISimpleAudioVolume volume = VolumeMixer.GetCoreAudioObject <ISimpleAudioVolume>(pid);
if (volume == null)
{
return(null);
}
float level;
volume.GetMasterVolume(out level);
Marshal.ReleaseComObject(volume);
return(level * 100);
}
/**
* Resets all reduced applications to the stored volume level
*/
public void RemoveReduction()
{
if (!this._ReductionApplied)
{
return;
}
this._WriteIfDebugging("Restoring volume levels");
foreach (AppVolume appVolume in this.GetStoredVolumeLevels())
{
if (!this._IsWhitelisted(appVolume))
{
VolumeMixer.SetApplicationVolume(appVolume.ProcessID, appVolume.Volume);
}
}
this._ReductionApplied = false;
}
/**
* Stores the current volume level of all applications and reduces their volumes by the reduction percent
*/
public void ApplyReduction()
{
this._LastReductionAttemptMicroTime = DateTimeOffset.Now.ToUnixTimeMilliseconds();
if (this._ReductionApplied)
{
this._WriteIfDebugging("Already reduced volume levels");
return;
}
this._ReductionApplied = true;
this.StoreCurrentVolumeLevels();
this._WriteIfDebugging("Reducing volume levels");
foreach (AppVolume appVolume in this.GetStoredVolumeLevels())
{
if (!this._IsWhitelisted(appVolume))
{
double newVolume = appVolume.Volume - (appVolume.Volume * this._Reduction);
this._WriteIfDebugging("Setting " + appVolume.Name + " from " + appVolume.Volume + " to " + newVolume);
if (!this._Debug)
{
VolumeMixer.SetApplicationVolume(appVolume.ProcessID, (float)newVolume);
}
}
}
//Wait for X to reset the timers
var resetTimer = new Timer();
resetTimer.Interval = 100;
resetTimer.AutoReset = true;
resetTimer.Elapsed += (object sender, ElapsedEventArgs e) =>
{
if (DateTimeOffset.Now.ToUnixTimeMilliseconds() - this._LastReductionAttemptMicroTime >= 1000 * this._RestoreVolumeAfter)
{
this.RemoveReduction();
resetTimer.Stop();
resetTimer.Dispose();
}
};
resetTimer.Start();
}
/**
* Gets the volume levels for all current processes
*/
public static List <AppVolume> GetAppVolumes()
{
List <AppVolume> appVolumes = new List <AppVolume>();
foreach (Process process in Process.GetProcesses())
{
float?processVolume = VolumeMixer.GetApplicationVolume(process.Id);
if (processVolume != null)
{
appVolumes.Add(new AppVolume
{
ProcessID = process.Id,
Path = PathFinder.GetProcessFilename(process),
Name = process.ProcessName,
Volume = (float)processVolume
});
}
}
return(appVolumes);
}
/**
* Listens for audio coming out of known voip applications
*/
public void ListenForIncomingVOIP()
{
int msSincePidCheck = AudioReducer._PIDRecheckInterval;
int msSinceCheck = 0;
List <float> valuesSinceCheck = new List <float>();
Dictionary <int, string> voipPids = new Dictionary <int, string>();
Timer voipChecker = new Timer();
voipChecker.AutoReset = true;
voipChecker.Interval = AudioReducer._VolumeRecheckInterval;
voipChecker.Elapsed += (sender, e) =>
{
msSinceCheck += (int)voipChecker.Interval;
msSincePidCheck += (int)voipChecker.Interval;
//Re-check voip apps for new/removed processes
if (msSincePidCheck > AudioReducer._PIDRecheckInterval)
{
msSincePidCheck = 0;
Process[] currentProcesses = Process.GetProcesses();
//Remove pids which are no longer valid
foreach (KeyValuePair <int, string> voipPid in voipPids.ToList())
{
if (!currentProcesses.Any(process => process.Id == voipPid.Key))
{
voipPids.Remove(voipPid.Key);
this._WriteIfDebugging("Voip app " + voipPid.Value + " (" + voipPid.Key + ") process lost");
}
}
//Load the pid by scanning the process list
foreach (String voipAppPath in this._VoipApps)
{
foreach (Process process in currentProcesses)
{
if (!voipPids.ContainsKey(process.Id))
{
String processPath = PathFinder.GetProcessFilename(process);
if (this._DoesPathWildcardMatch(processPath, voipAppPath))
{
voipPids[process.Id] = voipAppPath;
this._WriteIfDebugging("Voip app " + voipAppPath + " found as process " + process.Id);
}
}
}
}
}
//Update average value lists
foreach (KeyValuePair <int, string> voipPid in voipPids)
{
float?currentVolume = VolumeMixer.GetApplicationPeak(voipPid.Key);
if (currentVolume.HasValue)
{
valuesSinceCheck.Add(currentVolume.Value);
}
}
//If we've reached our check threshold check what the values have been
if (msSinceCheck >= this._MinimumNoiseLength * 1000)
{
double average = 0;
if (valuesSinceCheck.Count() > 0)
{
average = valuesSinceCheck.Average();
}
if (average > this._MinimumAppVolume)
{
this._WriteIfDebugging("Heard apps at qualifying average volume: " + average);
this.ApplyReductionIfNoisy();
}
valuesSinceCheck.Clear();
msSinceCheck = 0;
}
};
voipChecker.Start();
}
