Add settings for fallback behavior

update action icon with padding

src/FocusVolumeControl/ActiveAudioSessionWrapper.cs

@@ -1,73 +0,0 @@
-using CoreAudio;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace FocusVolumeControl
-{
-	public class ActiveAudioSessionWrapper
-	{
-		public string DisplayName { get; set; }
-		public string ExecutablePath { get; set; }
-		private List<SimpleAudioVolume> Volume { get; } = new List<SimpleAudioVolume>();
-
-		public string Icon { get; set; }
-
-		public bool Any()
-		{
-			return Volume.Any();
-		}
-		public int Count => Volume.Count;
-
-		public void AddVolume(SimpleAudioVolume volume)
-		{
-			Volume.Add(volume);
-		}
-
-		public void ToggleMute()
-		{
-			//when all volumes are muted, Volume.All will return true
-			//so we swap from muted to false (opposite of Volume.All)
-
-			//when any volumes are unmuted, Volume.All will return false
-			//so we set muted to true (opposite of Volume.All)
-
-			var muted = Volume.All(x => x.Mute);
-
-			Volume.ForEach(x => x.Mute = !muted);
-		}
-
-		public bool? GetMuted()
-		{
-			var muted = Volume.All(x => x.Mute);
-			var unmuted = Volume.All(x => !x.Mute);
-
-			if(muted == !unmuted)
-			{
-				return muted;
-			}
-			return null;
-		}
-
-		public void IncrementVolumeLevel(int step, int ticks)
-		{
-			//if you have more than one volume. they will all get set based on the first volume control
-			var level = Volume.FirstOrDefault()?.MasterVolume ?? 0;
-
-			level += (0.01f * step) * ticks;
-			level = Math.Max(level, 0);
-
-			Volume.ForEach(x => x.MasterVolume = level);
-		}
-
-		public int GetVolumeLevel()
-		{
-			var level = Volume.FirstOrDefault()?.MasterVolume ?? 0;
-			return (int)(level * 100);
-		}
-
-
-	}
-}

src/FocusVolumeControl/AudioHelper.cs

@@ -1,121 +1,180 @@
 using CoreAudio;
+using FocusVolumeControl.AudioSessions;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
-using System.Runtime.InteropServices;
-using System.Text;
-using System.Threading.Tasks;
 
-namespace FocusVolumeControl
+namespace FocusVolumeControl;
+
+public class AudioHelper
 {
-	public class AudioHelper
-	{
-		ActiveAudioSessionWrapper _current;
-		List<Process> _currentProcesses;
+	IAudioSession _current;
+	List<Process> _currentProcesses;
 
-		public ActiveAudioSessionWrapper FindSession(List<Process> processes)
+	public IAudioSession FindSession(List<Process> processes)
+	{
+		var deviceEnumerator = new MMDeviceEnumerator(Guid.NewGuid());
+
+		using var device = deviceEnumerator.GetDefaultAudioEndpoint(DataFlow.Render, Role.Multimedia);
+		using var manager = device.AudioSessionManager2;
+
+		var sessions = manager.Sessions;
+
+		var matchingSession = new ActiveAudioSessionWrapper();
+
+		foreach (var session in sessions)
+		{
+			var audioProcess = Process.GetProcessById((int)session.ProcessID);
+
+			if (processes.Any(x => x.Id == session.ProcessID || x.ProcessName == audioProcess?.ProcessName))
+			{
+				try
+				{
+					var displayName = audioProcess.MainModule.FileVersionInfo.FileDescription;
+					if (string.IsNullOrEmpty(displayName))
+					{
+						displayName = audioProcess.ProcessName;
+					}
+					matchingSession.DisplayName = displayName;
+				}
+				catch
+				{
+					matchingSession.DisplayName ??= audioProcess.ProcessName;
+				}
+
+				matchingSession.ExecutablePath ??= audioProcess.MainModule.FileName;
+
+				//some apps like discord have multiple volume processes.
+				matchingSession.AddVolume(session.SimpleAudioVolume);
+			}
+		}
+		return matchingSession.Any() ? matchingSession : null;
+	}
+
+	static object _lock = new object();
+
+	public IAudioSession GetActiveSession(FallbackBehavior fallbackBehavior)
+	{
+		lock (_lock)
+		{
+			var processes = GetPossibleProcesses();
+
+			if (_currentProcesses == null || !_currentProcesses.SequenceEqual(processes))
+			{
+				_current = FindSession(processes);
+			}
+
+			if(_current == null)
+			{
+				if(fallbackBehavior == FallbackBehavior.SystemSounds)
+				{
+					_current = GetSystemSounds();
+				}
+				else if(fallbackBehavior == FallbackBehavior.SystemVolume)
+				{
+					_current = GetSystemVolume();
+				}
+			}
+
+			_currentProcesses = processes;
+			return _current;
+		}
+	}
+
+	/// <summary>
+	/// Get the list of processes that might be currently selected
+	/// This includes getting the child window's processes
+	///
+	/// This helps to find the audo process for windows store apps whose process is "ApplicationFrameHost.exe"
+	///
+	/// The list may optionally include a parent process, because that helps thing steam to be more reliable because the steamwebhelper (ui) is a child of steam.exe
+	///
+	/// According to deej, getting the ForegroundWindow and enumerating steam windows should work, but it doesn't seem to work for me without including the parent process
+	/// https://github.com/omriharel/deej/blob/master/pkg/deej/util/util_windows.go#L22
+	/// 
+	/// but the parent process is sometimes useless (explorer, svchost, etc) so i filter some of them out because i felt like it when i wrote the code
+	///
+	/// I also experimented with grabbing the parent process and enumerating through the windows to see if that would help, but any time the parent process was an unexpected process (explorer) it could blow up. so i decided not to bother for now
+	/// </summary>
+	/// <returns></returns>
+	public List<Process> GetPossibleProcesses()
+	{
+		var handle = Native.GetForegroundWindow();
+
+		if (handle == IntPtr.Zero)
+		{
+			return null;
+		}
+
+		var ids = Native.GetProcessesOfChildWindows(handle);
+
+		Native.GetWindowThreadProcessId(handle, out var pid);
+		ids.Insert(0, pid);
+
+		var processes = ids.Distinct()
+						   .Select(x => Process.GetProcessById(x))
+						   .ToList();
+
+		try
+		{
+			var blah = ParentProcessUtilities.GetParentProcess(pid);
+			if (blah != null && blah.ProcessName != "explorer" && blah.ProcessName != "svchost")
+			{
+				processes.Add(blah);
+			}
+		}
+		catch
+		{
+		}
+
+		return processes;
+
+	}
+
+	public void ResetAll()
+	{
+		try
 		{
 			var deviceEnumerator = new MMDeviceEnumerator(Guid.NewGuid());
 
 			using var device = deviceEnumerator.GetDefaultAudioEndpoint(DataFlow.Render, Role.Multimedia);
 			using var manager = device.AudioSessionManager2;
 
-			var sessions = manager.Sessions;
-
-			var matchingSession = new ActiveAudioSessionWrapper();
-
-			foreach (var session in sessions)
+			foreach (var session in manager.Sessions)
 			{
-				var audioProcess = Process.GetProcessById((int)session.ProcessID);
-
-				if (processes.Any(x => x.Id == session.ProcessID || x.ProcessName == audioProcess?.ProcessName))
-				{
-					try
-					{
-						var displayName = audioProcess.MainModule.FileVersionInfo.FileDescription;
-						if(string.IsNullOrEmpty(displayName))
-						{
-							displayName = audioProcess.ProcessName;
-						}
-						matchingSession.DisplayName = displayName;
-					}
-					catch 
-					{
-						matchingSession.DisplayName ??= audioProcess.ProcessName;
-					}
-
-					matchingSession.ExecutablePath ??= audioProcess.MainModule.FileName;
-
-					//some apps like discord have multiple volume processes.
-					matchingSession.AddVolume(session.SimpleAudioVolume);
-				}
+				session.SimpleAudioVolume.MasterVolume = 1;
+				session.SimpleAudioVolume.Mute = false;
 			}
-			return matchingSession.Any() ? matchingSession : null;
 		}
-
-		public ActiveAudioSessionWrapper GetActiveSession()
-		{
-			var processes = GetPossibleProcesses();
-
-            if (_currentProcesses == null || !_currentProcesses.SequenceEqual(processes))
-            {
-				_current = FindSession(processes);
-            }
-
-			_currentProcesses = processes;
-			return _current;
-		}
-
-		/// <summary>
-		/// Get the list of processes that might be currently selected
-		/// This includes getting the child window's processes
-		///
-		/// This helps to find the audo process for windows store apps whose process is "ApplicationFrameHost.exe"
-		///
-		/// The list may optionally include a parent process, because that helps thing steam to be more reliable because the steamwebhelper (ui) is a child of steam.exe
-		///
-		/// According to deej, getting the ForegroundWindow and enumerating steam windows should work, but it doesn't seem to work for me without including the parent process
-		/// https://github.com/omriharel/deej/blob/master/pkg/deej/util/util_windows.go#L22
-		/// 
-		/// but the parent process is sometimes useless (explorer, svchost, etc) so i filter some of them out because i felt like it when i wrote the code
-		///
-		/// I also experimented with grabbing the parent process and enumerating through the windows to see if that would help, but any time the parent process was an unexpected process (explorer) it could blow up. so i decided not to bother for now
-		/// </summary>
-		/// <returns></returns>
-		public List<Process> GetPossibleProcesses()
-		{
-			var handle = Native.GetForegroundWindow();
-
-			if (handle == IntPtr.Zero)
-			{
-				return null;
-			}
-
-			var ids = Native.GetProcessesOfChildWindows(handle);
-
-			Native.GetWindowThreadProcessId(handle, out var pid);
-			ids.Insert(0, pid);
-
-			var processes = ids.Distinct()
-							   .Select(x => Process.GetProcessById(x))
-							   .ToList();
-
-			try
-			{
-				var blah = ParentProcessUtilities.GetParentProcess(pid);
-				if (blah != null && blah.ProcessName != "explorer" && blah.ProcessName != "svchost")
-				{
-					processes.Add(blah);
-				}
-			}
-			catch
-			{
-			}
-
-			return processes;
-
-		}
-
+		catch { }
 	}
+
+	public IAudioSession GetSystemSounds()
+	{
+		var deviceEnumerator = new MMDeviceEnumerator(Guid.NewGuid());
+
+		using var device = deviceEnumerator.GetDefaultAudioEndpoint(DataFlow.Render, Role.Multimedia);
+		using var manager = device.AudioSessionManager2;
+
+		var sessions = manager.Sessions;
+
+		foreach (var session in sessions)
+		{
+			if (session.IsSystemSoundsSession)
+			{
+				return new SystemSoundsAudioSession(session.SimpleAudioVolume);
+			}
+		}
+
+		return null;
+	}
+	public IAudioSession GetSystemVolume()
+	{
+		var deviceEnumerator = new MMDeviceEnumerator(Guid.NewGuid());
+
+		using var device = deviceEnumerator.GetDefaultAudioEndpoint(DataFlow.Render, Role.Multimedia);
+		return new SystemVolumeAudioSession(device.AudioEndpointVolume);
+	}
+
 }

src/FocusVolumeControl/AudioSessions/ActiveAudioSessionWrapper.cs

@@ -0,0 +1,82 @@
+using CoreAudio;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using BarRaider.SdTools;
+using System.Drawing;
+
+namespace FocusVolumeControl.AudioSessions;
+
+public class ActiveAudioSessionWrapper : IAudioSession
+{
+	public string DisplayName { get; set; }
+	public string ExecutablePath { get; set; }
+	private List<SimpleAudioVolume> Volume { get; } = new List<SimpleAudioVolume>();
+
+	string _icon;
+
+	public string GetIcon()
+	{
+		if (string.IsNullOrEmpty(_icon))
+		{
+			try
+			{
+				var tmp = Icon.ExtractAssociatedIcon(ExecutablePath);
+				_icon = Tools.ImageToBase64(tmp.ToBitmap(), true);
+			}
+			catch
+			{
+				_icon = "Image/pluginIcon.png";
+			}
+		}
+		return _icon;
+	}
+
+	public bool Any()
+	{
+		return Volume.Any();
+	}
+	public int Count => Volume.Count;
+
+	public void AddVolume(SimpleAudioVolume volume)
+	{
+		Volume.Add(volume);
+	}
+
+	public void ToggleMute()
+	{
+		//when all volumes are muted, Volume.All will return true
+		//so we swap from muted to false (opposite of Volume.All)
+
+		//when any volumes are unmuted, Volume.All will return false
+		//so we set muted to true (opposite of Volume.All)
+
+		var muted = Volume.All(x => x.Mute);
+
+		Volume.ForEach(x => x.Mute = !muted);
+	}
+
+	public bool IsMuted()
+	{
+		return Volume.All(x => x.Mute);
+	}
+
+	public void IncrementVolumeLevel(int step, int ticks)
+	{
+		//if you have more than one volume. they will all get set based on the first volume control
+		var level = Volume.FirstOrDefault()?.MasterVolume ?? 0;
+
+		level += (0.01f * step) * ticks;
+		level = Math.Max(level, 0);
+		level = Math.Min(level, 1);
+
+		Volume.ForEach(x => x.MasterVolume = level);
+	}
+
+	public int GetVolumeLevel()
+	{
+		var level = Volume.FirstOrDefault()?.MasterVolume ?? 0;
+		return (int)(level * 100);
+	}
+
+}

src/FocusVolumeControl/AudioSessions/IAudioSession.cs

@@ -0,0 +1,16 @@
+namespace FocusVolumeControl.AudioSessions;
+
+public interface IAudioSession
+{
+	public string DisplayName { get; }
+
+	public string GetIcon();
+
+	public void ToggleMute();
+
+	public bool IsMuted();
+
+	public void IncrementVolumeLevel(int step, int ticks);
+
+	public int GetVolumeLevel();
+}

src/FocusVolumeControl/AudioSessions/SystemSoundsAudioSession.cs

@@ -0,0 +1,38 @@
+using CoreAudio;
+using System;
+
+namespace FocusVolumeControl.AudioSessions;
+
+internal class SystemSoundsAudioSession : IAudioSession
+{
+	public SystemSoundsAudioSession(SimpleAudioVolume volumeControl)
+	{
+		_volumeControl = volumeControl;
+	}
+
+	SimpleAudioVolume _volumeControl;
+
+	public string DisplayName => "System sounds";
+	public string GetIcon() => "Images/systemSounds";
+
+	public void ToggleMute()
+	{
+		_volumeControl.Mute = !_volumeControl.Mute;
+	}
+
+	public bool IsMuted() => _volumeControl.Mute;
+
+	public void IncrementVolumeLevel(int step, int ticks)
+	{
+		var level = _volumeControl.MasterVolume;
+
+		level += (0.01f * step) * ticks;
+		level = Math.Max(level, 0);
+		level = Math.Min(level, 1);
+
+		_volumeControl.MasterVolume = level;
+	}
+
+	public int GetVolumeLevel() => (int)(_volumeControl.MasterVolume * 100);
+
+}

src/FocusVolumeControl/AudioSessions/SystemVolumeAudioSession.cs

@@ -0,0 +1,38 @@
+using CoreAudio;
+using System;
+
+namespace FocusVolumeControl.AudioSessions;
+
+internal class SystemVolumeAudioSession : IAudioSession
+{
+	public SystemVolumeAudioSession(AudioEndpointVolume volumeControl)
+	{
+		_volumeControl = volumeControl;
+	}
+
+	AudioEndpointVolume _volumeControl;
+
+	public string DisplayName => "System Volume";
+	public string GetIcon() => "Images/actionIcon";
+
+	public void ToggleMute()
+	{
+		_volumeControl.Mute = !_volumeControl.Mute;
+	}
+
+	public bool IsMuted() => _volumeControl.Mute;
+
+	public void IncrementVolumeLevel(int step, int ticks)
+	{
+		var level = _volumeControl.MasterVolumeLevelScalar;
+
+		level += (0.01f * step) * ticks;
+		level = Math.Max(level, 0);
+		level = Math.Min(level, 1);
+
+		_volumeControl.MasterVolumeLevelScalar = level;
+	}
+
+	public int GetVolumeLevel() => (int)(_volumeControl.MasterVolumeLevelScalar * 100);
+
+}

src/FocusVolumeControl/DialAction.cs

@@ -1,113 +1,101 @@
 using BarRaider.SdTools;
 using BarRaider.SdTools.Payloads;
-using CoreAudio;
+using FocusVolumeControl.AudioSessions;
 using FocusVolumeControl.UI;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using System;
-using System.Collections.Generic;
-using System.Data;
-using System.Diagnostics;
-using System.Drawing;
-using System.IO;
-using System.Linq;
-using System.Runtime.InteropServices;
-using System.ServiceModel.Description;
-using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows.Threading;
 
-namespace FocusVolumeControl
+namespace FocusVolumeControl;
+
+[PluginActionId("com.dlprows.focusvolumecontrol.dialaction")]
+public class DialAction : EncoderBase
 {
-
-	/*
-    todo:
-    link both discord processes
-    steam not detecting
-
-    long press reset
-
-    option for what to do when on app without sound
-
-     */
-
-
-	[PluginActionId("com.dlprows.focusvolumecontrol.dialaction")]
-	public class DialAction : EncoderBase
+	private class PluginSettings
 	{
-		private class PluginSettings
+
+		[JsonProperty("onVolumeNotFound")]
+		public FallbackBehavior FallbackBehavior { get; set; }
+
+		public static PluginSettings CreateDefaultSettings()
 		{
-			public static PluginSettings CreateDefaultSettings()
-			{
-				PluginSettings instance = new PluginSettings();
-				return instance;
-			}
+			PluginSettings instance = new PluginSettings();
+			instance.FallbackBehavior = FallbackBehavior.PreviousApp;
+			return instance;
+		}
+	}
+
+	private PluginSettings settings;
+
+	IntPtr _foregroundWindowChangedEvent;
+	Native.WinEventDelegate _delegate;
+
+	IAudioSession _currentAudioSession;
+	AudioHelper _audioHelper = new AudioHelper();
+
+	Thread _thread;
+	Dispatcher _dispatcher;
+
+	UIState _previousState;
+
+	public DialAction(ISDConnection connection, InitialPayload payload) : base(connection, payload)
+	{
+		if (payload.Settings == null || payload.Settings.Count == 0)
+		{
+			settings = PluginSettings.CreateDefaultSettings();
+			SaveSettings();
+		}
+		else
+		{
+			settings = payload.Settings.ToObject<PluginSettings>();
 		}
 
-		private PluginSettings settings;
-
-		IntPtr _foregroundWindowChangedEvent;
-		Native.WinEventDelegate _delegate;
-
-		ActiveAudioSessionWrapper _currentAudioSession;
-		AudioHelper _audioHelper = new AudioHelper();
-
-		Thread _thread;
-		Dispatcher _dispatcher;
-
-		UIState _previousState;
-
-		public DialAction(ISDConnection connection, InitialPayload payload) : base(connection, payload)
+		_thread = new Thread(() =>
 		{
-			if (payload.Settings == null || payload.Settings.Count == 0)
-			{
-				settings = PluginSettings.CreateDefaultSettings();
-				SaveSettings();
-			}
-			else
-			{
-				settings = payload.Settings.ToObject<PluginSettings>();
-			}
+			Logger.Instance.LogMessage(TracingLevel.DEBUG, "Registering for events");
+			_delegate = new Native.WinEventDelegate(WinEventProc);
+			_foregroundWindowChangedEvent = Native.RegisterForForegroundWindowChangedEvent(_delegate);
 
-			_thread = new Thread(() =>
-			{
-				Logger.Instance.LogMessage(TracingLevel.DEBUG, "Registering for events");
-				_delegate = new Native.WinEventDelegate(WinEventProc);
-				_foregroundWindowChangedEvent = Native.RegisterForForegroundWindowChangedEvent(_delegate);
+			Logger.Instance.LogMessage(TracingLevel.DEBUG, "Starting Dispatcher");
+			_dispatcher = Dispatcher.CurrentDispatcher;
+			Dispatcher.Run();
+			Logger.Instance.LogMessage(TracingLevel.DEBUG, "Dispatcher Stopped");
+		});
+		_thread.SetApartmentState(ApartmentState.STA);
+		_thread.Start();
 
-				Logger.Instance.LogMessage(TracingLevel.DEBUG, "Starting Dispatcher");
-				_dispatcher = Dispatcher.CurrentDispatcher;
-				Dispatcher.Run();
-				Logger.Instance.LogMessage(TracingLevel.DEBUG, "Dispatcher Stopped");
-			});
-			_thread.SetApartmentState(ApartmentState.STA);
-			_thread.Start();
 
+		_currentAudioSession = settings.FallbackBehavior == FallbackBehavior.SystemSounds ? _audioHelper.GetSystemSounds() : _audioHelper.GetSystemVolume();
+	}
+
+	public override async void DialDown(DialPayload payload)
+	{
+		//dial pressed down
+		Logger.Instance.LogMessage(TracingLevel.INFO, "Dial Down");
+		await ToggleMuteAsync();
+	}
+
+	public override async void TouchPress(TouchpadPressPayload payload)
+	{
+		Logger.Instance.LogMessage(TracingLevel.INFO, "Touch Press");
+		if (payload.IsLongPress)
+		{
+			_audioHelper.ResetAll();
 		}
-
-		public override async void DialDown(DialPayload payload)
+		else
 		{
-			//dial pressed down
-			Logger.Instance.LogMessage(TracingLevel.INFO, "Dial Down");
 			await ToggleMuteAsync();
 		}
+	}
 
-		public override async void TouchPress(TouchpadPressPayload payload)
+	async Task ToggleMuteAsync()
+	{
+		try
 		{
-			Logger.Instance.LogMessage(TracingLevel.INFO, "Touch Press");
-			if (payload.IsLongPress)
-			{
-				//todo: iterate through all sessions setting them back to 100 except the master volume
-			}
-			else
-			{
-				await ToggleMuteAsync();
-			}
-		}
 
-		async Task ToggleMuteAsync()
-		{
 			if (_currentAudioSession != null)
 			{
 				_currentAudioSession.ToggleMute();
@@ -118,11 +106,19 @@ namespace FocusVolumeControl
 				await Connection.ShowAlert();
 			}
 		}
-
-		public override async void DialRotate(DialRotatePayload payload)
+		catch (Exception ex)
+		{
+			await Connection.ShowAlert();
+			Logger.Instance.LogMessage(TracingLevel.ERROR, $"Unable to toggle mute: {ex.Message}");
+		}
+	}
+
+	public override async void DialRotate(DialRotatePayload payload)
+	{
+		Logger.Instance.LogMessage(TracingLevel.INFO, "Dial Rotate");
+		//dial rotated. ticks positive for right, negative for left
+		try
 		{
-			Logger.Instance.LogMessage(TracingLevel.INFO, "Dial Rotate");
-			//dial rotated. ticks positive for right, negative for left
 			if (_currentAudioSession != null)
 			{
 				_currentAudioSession.IncrementVolumeLevel(1, payload.Ticks);
@@ -133,89 +129,89 @@ namespace FocusVolumeControl
 				await Connection.ShowAlert();
 			}
 		}
-
-		public override void DialUp(DialPayload payload)
+		catch (Exception ex)
 		{
-			//dial unpressed
-			Logger.Instance.LogMessage(TracingLevel.INFO, "Dial Up");
+			await Connection.ShowAlert();
+			Logger.Instance.LogMessage(TracingLevel.ERROR, $"Unable to toggle mute: {ex.Message}");
 		}
+	}
 
-		public override void Dispose()
-		{
-			Logger.Instance.LogMessage(TracingLevel.DEBUG, "Disposing");
+	public override void DialUp(DialPayload payload)
+	{
+		//dial unpressed
+		Logger.Instance.LogMessage(TracingLevel.INFO, "Dial Up");
+	}
+
+	public override void Dispose()
+	{
+		Logger.Instance.LogMessage(TracingLevel.DEBUG, "Disposing");
             if(_foregroundWindowChangedEvent != IntPtr.Zero)
             {
                 Native.UnhookWinEvent(_foregroundWindowChangedEvent);
             }
-			_dispatcher.InvokeShutdown();
+		_dispatcher.InvokeShutdown();
+	}
+
+	public override async void OnTick()
+	{
+		//called once every 1000ms and can be used for updating the title/image of the key
+		var activeSession = _audioHelper.GetActiveSession(settings.FallbackBehavior);
+
+		if(activeSession != null)
+		{
+			_currentAudioSession = activeSession;
 		}
 
-		public override async void OnTick()
-		{
-			//called once every 1000ms and can be used for updating the title/image fo the key
-			var activeSession = _audioHelper.GetActiveSession();
+		await UpdateStateIfNeeded();
+	}
 
-			if (activeSession == null)
+	private async Task UpdateStateIfNeeded()
+	{
+		if (_currentAudioSession != null)
+		{
+
+			var uiState = new UIState(_currentAudioSession);
+
+			if ( _previousState != null && uiState != null &&
+				uiState.Title == _previousState.Title &&
+				uiState.Value.Value == _previousState.Value.Value &&
+				uiState.Value.Opacity == _previousState.Value.Opacity &&
+				uiState.Indicator.Value == _previousState.Indicator.Value &&
+				uiState.Indicator.Opacity == _previousState.Indicator.Opacity &&
+				uiState.icon.Value == _previousState.icon.Value &&
+				uiState.icon.Opacity == _previousState.icon.Opacity
+				)
 			{
-				//todo: something?
-			}
-			else
-			{
-				_currentAudioSession = activeSession;
+				return;
 			}
 
-			await UpdateStateIfNeeded();
-		}
-
-		private async Task UpdateStateIfNeeded()
-		{
-			if (_currentAudioSession != null)
-			{
-
-				var uiState = UIState.Build(_currentAudioSession);
-
-				if ( _previousState != null && uiState != null &&
-					uiState.Title == _previousState.Title &&
-					uiState.Value.Value == _previousState.Value.Value &&
-					uiState.Value.Opacity == _previousState.Value.Opacity &&
-					uiState.Indicator.Value == _previousState.Indicator.Value &&
-					uiState.Indicator.Opacity == _previousState.Indicator.Opacity &&
-					uiState.icon.Value == _previousState.icon.Value &&
-					uiState.icon.Opacity == _previousState.icon.Opacity
-					)
-				{
-					return;
-				}
-
-				await Connection.SetFeedbackAsync(uiState);
-				_previousState = uiState;
-			}
+			await Connection.SetFeedbackAsync(uiState);
+			_previousState = uiState;
 		}
+	}
 
 
-		public override void ReceivedGlobalSettings(ReceivedGlobalSettingsPayload payload)
-		{
-		}
+	public override void ReceivedGlobalSettings(ReceivedGlobalSettingsPayload payload)
+	{
+	}
 
 
-		public override void ReceivedSettings(ReceivedSettingsPayload payload)
-		{
-			Tools.AutoPopulateSettings(settings, payload.Settings);
-			SaveSettings();
-		}
+	public override void ReceivedSettings(ReceivedSettingsPayload payload)
+	{
+		Tools.AutoPopulateSettings(settings, payload.Settings);
+		SaveSettings();
+	}
 
-		private Task SaveSettings()
-		{
-			return Connection.SetSettingsAsync(JObject.FromObject(settings));
-		}
+	private Task SaveSettings()
+	{
+		return Connection.SetSettingsAsync(JObject.FromObject(settings));
+	}
 
 
         public void WinEventProc(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime)
         {
-			OnTick();
+		OnTick();
         }
 
 
-	}
-
 }

src/FocusVolumeControl/FallbackBehavior.cs

@@ -0,0 +1,8 @@
+namespace FocusVolumeControl;
+
+public enum FallbackBehavior
+{
+	PreviousApp,
+	SystemSounds,
+	SystemVolume
+}

src/FocusVolumeControl/FocusVolumeControl.csproj

@@ -54,13 +54,16 @@
     <Reference Include="WindowsBase" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="ActiveAudioSessionWrapper.cs" />
+    <Compile Include="AudioSessions\ActiveAudioSessionWrapper.cs" />
     <Compile Include="AudioHelper.cs" />
+    <Compile Include="AudioSessions\SystemSoundsAudioSession.cs" />
+    <Compile Include="AudioSessions\SystemVolumeAudioSession.cs" />
     <Compile Include="DialAction.cs" />
-    <Compile Include="ISDConnectionExtensions.cs" />
+    <Compile Include="AudioSessions\IAudioSession.cs" />
+    <Compile Include="FallbackBehavior.cs" />
+    <Compile Include="UI\ISDConnectionExtensions.cs" />
     <Compile Include="Native.cs" />
     <Compile Include="ParentProcessUtilities.cs" />
-    <Compile Include="PluginAction.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="UI\UIState.cs" />
@@ -104,6 +107,12 @@
     <Content Include="Images\pluginIcon.png">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+    <Content Include="Images\systemSounds%402x.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+    <Content Include="Images\systemSounds.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
     <Content Include="PropertyInspector\PluginActionPI.html">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>

src/FocusVolumeControl/ISDConnectionExtensions.cs

@@ -1,18 +0,0 @@
-using BarRaider.SdTools;
-using Newtonsoft.Json.Linq;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace FocusVolumeControl
-{
-	internal static class ISDConnectionExtensions
-	{
-		public static async Task SetFeedbackAsync(this ISDConnection _this, object feedbackPayload)
-		{
-			await _this.SetFeedbackAsync(JObject.FromObject(feedbackPayload));
-		}
-	}
-}

src/FocusVolumeControl/Native.cs

@@ -1,64 +1,62 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using System.Runtime.InteropServices;
-using System.Text;
-using System.Threading.Tasks;
 
-namespace FocusVolumeControl
+namespace FocusVolumeControl;
+
+public class Native
 {
-	public class Native
+	public delegate void WinEventDelegate(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime);
+
+	[DllImport("user32.dll")]
+	static extern IntPtr SetWinEventHook(uint eventMin, uint eventMax, IntPtr hmodWinEventProc, WinEventDelegate lpfnWinEventProc, uint idProcess, uint idThread, uint dwFlags);
+
+	[DllImport("user32.dll")]
+	public static extern bool UnhookWinEvent(IntPtr hWinEventHook);
+
+
+	private const uint WINEVENT_OUTOFCONTEXT = 0;
+	private const uint EVENT_SYSTEM_FOREGROUND = 3;
+
+	public static IntPtr RegisterForForegroundWindowChangedEvent(WinEventDelegate dele) => SetWinEventHook(EVENT_SYSTEM_FOREGROUND, EVENT_SYSTEM_FOREGROUND, IntPtr.Zero, dele, 0, 0, WINEVENT_OUTOFCONTEXT);
+
+
+	[DllImport("user32.dll")]
+	public static extern IntPtr GetForegroundWindow();
+
+	[DllImport("user32.dll", SetLastError = true)]
+	public static extern uint GetWindowThreadProcessId(IntPtr hWnd, out int processId);
+
+	
+	private delegate bool EnumWindowProc(IntPtr hwnd, IntPtr lParam);
+
+	[DllImport("user32")]
+	[return: MarshalAs(UnmanagedType.Bool)]
+	private static extern bool EnumChildWindows(IntPtr window, EnumWindowProc callback, IntPtr lParam);
+
+
+	public static List<int> GetProcessesOfChildWindows(IntPtr windowHandle)
 	{
-		public delegate void WinEventDelegate(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime);
+		var ids = new List<int>();
 
-		[DllImport("user32.dll")]
-		static extern IntPtr SetWinEventHook(uint eventMin, uint eventMax, IntPtr hmodWinEventProc, WinEventDelegate lpfnWinEventProc, uint idProcess, uint idThread, uint dwFlags);
-
-		[DllImport("user32.dll")]
-		public static extern bool UnhookWinEvent(IntPtr hWinEventHook);
-
-
-		private const uint WINEVENT_OUTOFCONTEXT = 0;
-		private const uint EVENT_SYSTEM_FOREGROUND = 3;
-
-		public static IntPtr RegisterForForegroundWindowChangedEvent(WinEventDelegate dele) => SetWinEventHook(EVENT_SYSTEM_FOREGROUND, EVENT_SYSTEM_FOREGROUND, IntPtr.Zero, dele, 0, 0, WINEVENT_OUTOFCONTEXT);
-
-
-		[DllImport("user32.dll")]
-		public static extern IntPtr GetForegroundWindow();
-
-		[DllImport("user32.dll", SetLastError = true)]
-		public static extern uint GetWindowThreadProcessId(IntPtr hWnd, out int processId);
-
-		
-		private delegate bool EnumWindowProc(IntPtr hwnd, IntPtr lParam);
-
-		[DllImport("user32")]
-		[return: MarshalAs(UnmanagedType.Bool)]
-		private static extern bool EnumChildWindows(IntPtr window, EnumWindowProc callback, IntPtr lParam);
-
-
-		public static List<int> GetProcessesOfChildWindows(IntPtr windowHandle)
+		if(windowHandle != IntPtr.Zero)
 		{
-			var ids = new List<int>();
 
-			if(windowHandle != IntPtr.Zero)
-			{
+		EnumChildWindows(windowHandle,
+				(hWnd, lParam) => 
+				{
+					Native.GetWindowThreadProcessId(hWnd, out var pid);
+					ids.Add(pid);
 
-			EnumChildWindows(windowHandle,
-					(hWnd, lParam) => 
-					{
-						Native.GetWindowThreadProcessId(hWnd, out var pid);
-						ids.Add(pid);
+				return true;
 
-					return true;
-
-				}, IntPtr.Zero);
-			}
-
-			return ids;
+			}, IntPtr.Zero);
 		}
 
-
+		return ids;
 	}
+
+	[DllImport("ntdll.dll")]
+	public static extern int NtQueryInformationProcess(IntPtr processHandle, int processInformationClass, ref ParentProcessUtilities processInformation, int processInformationLength, out int returnLength);
+
 }

src/FocusVolumeControl/ParentProcessUtilities.cs

@@ -1,65 +1,57 @@
 using System;
-using System.Collections.Generic;
 using System.Diagnostics;
-using System.Linq;
 using System.Runtime.InteropServices;
-using System.Text;
-using System.Threading.Tasks;
 
-namespace FocusVolumeControl
+namespace FocusVolumeControl;
+
+/// <summary>
+/// A utility class to determine a process parent.
+/// </summary>
+[StructLayout(LayoutKind.Sequential)]
+public struct ParentProcessUtilities
 {
+	// These members must match PROCESS_BASIC_INFORMATION
+	internal IntPtr Reserved1;
+	internal IntPtr PebBaseAddress;
+	internal IntPtr Reserved2_0;
+	internal IntPtr Reserved2_1;
+	internal IntPtr UniqueProcessId;
+	internal IntPtr InheritedFromUniqueProcessId;
+
+	
 	/// <summary>
-	/// A utility class to determine a process parent.
+	/// Gets the parent process of specified process.
 	/// </summary>
-	[StructLayout(LayoutKind.Sequential)]
-	public struct ParentProcessUtilities
+	/// <param name="id">The process id.</param>
+	/// <returns>An instance of the Process class.</returns>
+	public static Process GetParentProcess(int id)
 	{
-		// These members must match PROCESS_BASIC_INFORMATION
-		internal IntPtr Reserved1;
-		internal IntPtr PebBaseAddress;
-		internal IntPtr Reserved2_0;
-		internal IntPtr Reserved2_1;
-		internal IntPtr UniqueProcessId;
-		internal IntPtr InheritedFromUniqueProcessId;
+		var process = Process.GetProcessById(id);
+		return GetParentProcess(process);
+	}
 
-		[DllImport("ntdll.dll")]
-		private static extern int NtQueryInformationProcess(IntPtr processHandle, int processInformationClass, ref ParentProcessUtilities processInformation, int processInformationLength, out int returnLength);
-
-		/// <summary>
-		/// Gets the parent process of specified process.
-		/// </summary>
-		/// <param name="id">The process id.</param>
-		/// <returns>An instance of the Process class.</returns>
-		public static Process GetParentProcess(int id)
+	/// <summary>
+	/// Gets the parent process of a specified process.
+	/// </summary>
+	/// <param name="handle">The process handle.</param>
+	/// <returns>An instance of the Process class.</returns>
+	public static Process GetParentProcess(Process process)
+	{
+		var data = new ParentProcessUtilities();
+		int status = Native.NtQueryInformationProcess(process.Handle, 0, ref data, Marshal.SizeOf(data), out var returnLength);
+		if (status != 0)
 		{
-			var process = Process.GetProcessById(id);
-			return GetParentProcess(process);
+			return null;
 		}
 
-		/// <summary>
-		/// Gets the parent process of a specified process.
-		/// </summary>
-		/// <param name="handle">The process handle.</param>
-		/// <returns>An instance of the Process class.</returns>
-		public static Process GetParentProcess(Process process)
+		try
 		{
-			var data = new ParentProcessUtilities();
-			int status = NtQueryInformationProcess(process.Handle, 0, ref data, Marshal.SizeOf(data), out var returnLength);
-			if (status != 0)
-			{
-				return null;
-			}
-
-			try
-			{
-				return Process.GetProcessById(data.InheritedFromUniqueProcessId.ToInt32());
-			}
-			catch
-			{
-				return null;
-			}
+			return Process.GetProcessById(data.InheritedFromUniqueProcessId.ToInt32());
+		}
+		catch
+		{
+			return null;
 		}
-
 	}
 
 }

src/FocusVolumeControl/PluginAction.cs

@@ -1,83 +0,0 @@
-using BarRaider.SdTools;
-using Newtonsoft.Json;
-using Newtonsoft.Json.Linq;
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace FocusVolumeControl
-{
-	[PluginActionId("FocusVolumeControl.pluginaction")]
-	public class PluginAction : KeypadBase
-	{
-		private class PluginSettings
-		{
-			public static PluginSettings CreateDefaultSettings()
-			{
-				PluginSettings instance = new PluginSettings();
-				instance.OutputFileName = String.Empty;
-				instance.InputString = String.Empty;
-				return instance;
-			}
-
-			[FilenameProperty]
-			[JsonProperty(PropertyName = "outputFileName")]
-			public string OutputFileName { get; set; }
-
-			[JsonProperty(PropertyName = "inputString")]
-			public string InputString { get; set; }
-		}
-
-		#region Private Members
-
-		private PluginSettings settings;
-
-		#endregion
-		public PluginAction(SDConnection connection, InitialPayload payload) : base(connection, payload)
-		{
-			if (payload.Settings == null || payload.Settings.Count == 0)
-			{
-				this.settings = PluginSettings.CreateDefaultSettings();
-				SaveSettings();
-			}
-			else
-			{
-				this.settings = payload.Settings.ToObject<PluginSettings>();
-			}
-		}
-
-		public override void Dispose()
-		{
-			Logger.Instance.LogMessage(TracingLevel.INFO, $"Destructor called");
-		}
-
-		public override void KeyPressed(KeyPayload payload)
-		{
-			Logger.Instance.LogMessage(TracingLevel.INFO, "Key Pressed");
-		}
-
-		public override void KeyReleased(KeyPayload payload) { }
-
-		public override void OnTick() { }
-
-		public override void ReceivedSettings(ReceivedSettingsPayload payload)
-		{
-			Tools.AutoPopulateSettings(settings, payload.Settings);
-			SaveSettings();
-		}
-
-		public override void ReceivedGlobalSettings(ReceivedGlobalSettingsPayload payload) { }
-
-		#region Private Methods
-
-		private Task SaveSettings()
-		{
-			return Connection.SetSettingsAsync(JObject.FromObject(settings));
-		}
-
-		#endregion
-	}
-}

src/FocusVolumeControl/Program.cs

@@ -1,20 +1,14 @@
 using BarRaider.SdTools;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
-namespace FocusVolumeControl
+namespace FocusVolumeControl;
+
+internal class Program
 {
-	internal class Program
+	static void Main(string[] args)
 	{
-		static void Main(string[] args)
-		{
-			// Uncomment this line of code to allow for debugging
-			//while (!System.Diagnostics.Debugger.IsAttached) { System.Threading.Thread.Sleep(100); }
+		// Uncomment this line of code to allow for debugging
+		//while (!System.Diagnostics.Debugger.IsAttached) { System.Threading.Thread.Sleep(100); }
 
-			SDWrapper.Run(args);
-		}
+		SDWrapper.Run(args);
 	}
 }

src/FocusVolumeControl/PropertyInspector/PluginActionPI.html

@@ -12,6 +12,24 @@
 </head>
 <body>
     <div class="sdpi-wrapper">
+        <div class="sdpi-item">
+            <div class="sdpi-item-label">Fallback Behavior</div>
+            <select class="sdpi-item-value sdProperty" id="fallbackBehavior" oninput="setSettings()">
+                <option value="0">Previous App</option>
+                <option value="1">System Sounds</option>
+                <option value="2">Main System Volume</option>
+            </select>
+        </div>
+        <div class="sdpi-item">
+            <details class="message">
+                <p>If the focused app does not have a volume control you can pick your desired behavior</p>
+                <ul>
+                    <li>Previous App - the focused app will be the last app that had a volume control</li>
+                    <li>System Sounds - switch to control system sounds. For example, if you're using an app that makes a windows "error" sound, its volume is controlled by system sounds. So you can adjust the error sound without impacting other apps</li>
+                    <li>Main System Volume - switch to the main volume control for the system. This will change the volume of all apps</li>
+                </ul>
+            </details>
+        </div>
     </div>
 </body>
 </html>

src/FocusVolumeControl/UI/ISDConnectionExtensions.cs

@@ -0,0 +1,13 @@
+using BarRaider.SdTools;
+using Newtonsoft.Json.Linq;
+using System.Threading.Tasks;
+
+namespace FocusVolumeControl.UI;
+
+internal static class ISDConnectionExtensions
+{
+	public static async Task SetFeedbackAsync(this ISDConnection _this, object feedbackPayload)
+	{
+		await _this.SetFeedbackAsync(JObject.FromObject(feedbackPayload));
+	}
+}

src/FocusVolumeControl/UI/UIState.cs

@@ -8,58 +8,34 @@ using System.Text;
 using System.Threading.Tasks;
 using BarRaider.SdTools;
 using Newtonsoft.Json;
+using FocusVolumeControl.AudioSessions;
 
-namespace FocusVolumeControl.UI
+namespace FocusVolumeControl.UI;
+
+internal class UIState
 {
-	internal class UIState
+	[JsonProperty("title")]
+	public string Title { get; private init; }
+
+	[JsonProperty("value")]
+	public ValueWithOpacity<string> Value { get; private init; }
+
+	[JsonProperty("indicator")]
+	public ValueWithOpacity<float>Indicator { get; private init; }
+
+	[JsonProperty("icon")]
+	public ValueWithOpacity<string> icon { get; private init; }
+
+	public UIState(IAudioSession session)
 	{
-		[JsonProperty("title")]
-		public string Title { get; private init; }
-
-		[JsonProperty("value")]
-		public ValueWithOpacity<string> Value { get; private init; }
-
-		[JsonProperty("indicator")]
-		public ValueWithOpacity<float>Indicator { get; private init; }
-
-		[JsonProperty("icon")]
-		public ValueWithOpacity<string> icon { get; private init; }
-
-		public static UIState Build(ActiveAudioSessionWrapper session)
-		{
-			var volume = session.GetVolumeLevel();
-
-			var opacity = session.GetMuted() != true ? 1 : 0.5f;
-
-			var iconData = "";
-
-			if (session.Icon != null)
-			{
-				iconData = session.Icon;
-			}
-			else
-			{
-				try
-				{
-					var icon = Icon.ExtractAssociatedIcon(session.ExecutablePath);
-					iconData = Tools.ImageToBase64(icon.ToBitmap(), true);
-				}
-				catch
-				{
-					iconData = "Image/pluginIcon.png";
-				}
-				session.Icon = iconData;
-			}
-
-
-			return new UIState()
-			{
-				Title = session.DisplayName,
-				Value = new() { Value = $"{volume}%", Opacity = opacity },
-				Indicator = new() { Value = volume, Opacity = opacity },
-				icon = new() { Value = iconData, Opacity = opacity },
-			};
-		}
+		var volume = session.GetVolumeLevel();
+		var opacity = session.IsMuted() ? 0.5f : 1;
+		var iconData = session.GetIcon();
 
+		Title = session.DisplayName;
+		Value = new() { Value = $"{volume}%", Opacity = opacity };
+		Indicator = new() { Value = volume, Opacity = opacity };
+		icon = new() { Value = iconData, Opacity = opacity };
 	}
+
 }

src/FocusVolumeControl/UI/ValueWithOpacity.cs

@@ -1,20 +1,13 @@
 using Newtonsoft.Json;
-using System;
-using System.Collections.Generic;
-using System.Data.SqlTypes;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
-namespace FocusVolumeControl.UI
+namespace FocusVolumeControl.UI;
+
+internal class ValueWithOpacity<T>
 {
-	internal class ValueWithOpacity<T>
-	{
-		[JsonProperty("value")]
-		public required T Value { get; init; }
+	[JsonProperty("value")]
+	public required T Value { get; init; }
 
-		[JsonProperty("opacity")]
-		public required float Opacity { get; init; }
+	[JsonProperty("opacity")]
+	public required float Opacity { get; init; }
 
-	}
 }

src/SoundBrowser/MainWindow.xaml.cs

@@ -1,135 +1,118 @@
 using CoreAudio;
 using FocusVolumeControl;
 using System;
-using System.Collections.Generic;
-using System.ComponentModel;
 using System.Diagnostics;
-using System.Linq;
-using System.Management;
-using System.Runtime.InteropServices;
 using System.Text;
-using System.Threading.Tasks;
 using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
 
-namespace SoundBrowser
+namespace SoundBrowser;
+
+/// <summary>
+/// Interaction logic for MainWindow.xaml
+/// </summary>
+public partial class MainWindow : Window
 {
-	/// <summary>
-	/// Interaction logic for MainWindow.xaml
-	/// </summary>
-	public partial class MainWindow : Window
+
+	AudioHelper _audioHelper;
+	Native.WinEventDelegate _delegate;
+
+	public MainWindow()
 	{
+		InitializeComponent();
+		_audioHelper = new AudioHelper();
 
-		AudioHelper _audioHelper;
-		Native.WinEventDelegate _delegate;
-
-		public MainWindow()
-		{
-			InitializeComponent();
-			_audioHelper = new AudioHelper();
-
-			//normally you can just pass a lambda, but for some reason, that seems to get garbage collected
-			_delegate = new Native.WinEventDelegate(WinEventProc);
-			Native.RegisterForForegroundWindowChangedEvent(_delegate);
-		}
-
-		public void WinEventProc(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime)
-		{
-			SetupCurrentAppFields();
-			SetupAllSessionFields();
-		}
-
-		private void SetupCurrentAppFields()
-		{
-			var handle = Native.GetForegroundWindow();
-			var sb = new StringBuilder();
-
-			if (handle != IntPtr.Zero)
-			{
-				//use this in debug to help there be less events
-
-				/*
-				Native.GetWindowThreadProcessId(handle, out var fpid);
-				var fp = Process.GetProcessById(fpid);
-
-				if(!fp.ProcessName.Contains("FSD"))
-				{
-					return;
-				}
-				*/
-
-				var processes = _audioHelper.GetPossibleProcesses();
-				var session = _audioHelper.FindSession(processes);
-
-				foreach (var p in processes)
-				{
-
-					sb.AppendLine($"pid: {p.Id}");
-					sb.AppendLine($"\tprocessName: {p.ProcessName}");
-					try
-					{
-						sb.AppendLine($"\tFileDescription: {p!.MainModule!.FileVersionInfo.FileDescription}");
-					}
-					catch
-					{
-						sb.AppendLine("\tFileDescription: ##ERROR##");
-					}
-
-
-				}
-
-				sb.AppendLine();
-				if (session != null)
-				{
-					sb.AppendLine("picked the following best match");
-					sb.AppendLine($"\tsession: {session.DisplayName}");
-					sb.AppendLine($"\tvolume: {session.GetVolumeLevel()}");
-					sb.AppendLine($"\tcount: {session.Count}");
-				}
-				else
-				{
-					sb.AppendLine("No Match");
-				}
-			}
-
-			_tf.Text = sb.ToString();
-		}
-
-		private void SetupAllSessionFields()
-		{
-			_tf2.Text = "";
-			var sb = new StringBuilder();
-			sb.AppendLine("-------------------------------------------------------------------------------");
-
-			var deviceEnumerator = new MMDeviceEnumerator(Guid.NewGuid());
-
-			using var device = deviceEnumerator.GetDefaultAudioEndpoint(DataFlow.Render, Role.Multimedia);
-			using var manager = device.AudioSessionManager2;
-
-			var sessions = manager!.Sessions;
-
-			foreach (var session in sessions!)
-			{
-				var audioProcess = Process.GetProcessById((int)session.ProcessID);
-
-				var displayName = audioProcess!.MainModule!.FileVersionInfo.FileDescription;
-
-				sb.AppendLine($"pid: {audioProcess.Id}");
-				sb.AppendLine($"\tprocessName: {audioProcess.ProcessName}");
-				sb.AppendLine($"\tsession: {displayName}");
-			}
-
-			_tf2.Text = sb.ToString();
-		}
-
-
+		//normally you can just pass a lambda, but for some reason, that seems to get garbage collected
+		_delegate = new Native.WinEventDelegate(WinEventProc);
+		Native.RegisterForForegroundWindowChangedEvent(_delegate);
 	}
 
+	public void WinEventProc(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime)
+	{
+		SetupCurrentAppFields();
+		SetupAllSessionFields();
+	}
+
+	private void SetupCurrentAppFields()
+	{
+		var handle = Native.GetForegroundWindow();
+		var sb = new StringBuilder();
+
+		if (handle != IntPtr.Zero)
+		{
+			//use this in debug to help there be less events
+
+			/*
+			Native.GetWindowThreadProcessId(handle, out var fpid);
+			var fp = Process.GetProcessById(fpid);
+
+			if(!fp.ProcessName.Contains("FSD"))
+			{
+				return;
+			}
+			*/
+
+			var processes = _audioHelper.GetPossibleProcesses();
+			var session = _audioHelper.FindSession(processes);
+
+			foreach (var p in processes)
+			{
+
+				sb.AppendLine($"pid: {p.Id}");
+				sb.AppendLine($"\tprocessName: {p.ProcessName}");
+				try
+				{
+					sb.AppendLine($"\tFileDescription: {p!.MainModule!.FileVersionInfo.FileDescription}");
+				}
+				catch
+				{
+					sb.AppendLine("\tFileDescription: ##ERROR##");
+				}
+
+
+			}
+
+			sb.AppendLine();
+			if (session != null)
+			{
+				sb.AppendLine("picked the following best match");
+				sb.AppendLine($"\tsession: {session.DisplayName}");
+				sb.AppendLine($"\tvolume: {session.GetVolumeLevel()}");
+			}
+			else
+			{
+				sb.AppendLine("No Match");
+			}
+		}
+
+		_tf.Text = sb.ToString();
+	}
+
+	private void SetupAllSessionFields()
+	{
+		_tf2.Text = "";
+		var sb = new StringBuilder();
+		sb.AppendLine("-------------------------------------------------------------------------------");
+
+		var deviceEnumerator = new MMDeviceEnumerator(Guid.NewGuid());
+
+		using var device = deviceEnumerator.GetDefaultAudioEndpoint(DataFlow.Render, Role.Multimedia);
+		using var manager = device.AudioSessionManager2;
+
+		var sessions = manager!.Sessions;
+
+		foreach (var session in sessions!)
+		{
+			var audioProcess = Process.GetProcessById((int)session.ProcessID);
+
+			var displayName = audioProcess!.MainModule!.FileVersionInfo.FileDescription;
+
+			sb.AppendLine($"pid: {audioProcess.Id}");
+			sb.AppendLine($"\tprocessName: {audioProcess.ProcessName}");
+			sb.AppendLine($"\tsession: {displayName}");
+		}
+
+		_tf2.Text = sb.ToString();
+	}
+
+
 }

src/SoundBrowser/ParentProcessUtilities.cs

@@ -1,65 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Diagnostics;
-using System.Linq;
-using System.Runtime.InteropServices;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace SoundBrowser
-{
-	/// <summary>
-	/// A utility class to determine a process parent.
-	/// </summary>
-	[StructLayout(LayoutKind.Sequential)]
-	public struct ParentProcessUtilities
-	{
-		// These members must match PROCESS_BASIC_INFORMATION
-		internal IntPtr Reserved1;
-		internal IntPtr PebBaseAddress;
-		internal IntPtr Reserved2_0;
-		internal IntPtr Reserved2_1;
-		internal IntPtr UniqueProcessId;
-		internal IntPtr InheritedFromUniqueProcessId;
-
-		[DllImport("ntdll.dll")]
-		private static extern int NtQueryInformationProcess(IntPtr processHandle, int processInformationClass, ref ParentProcessUtilities processInformation, int processInformationLength, out int returnLength);
-
-		/// <summary>
-		/// Gets the parent process of specified process.
-		/// </summary>
-		/// <param name="id">The process id.</param>
-		/// <returns>An instance of the Process class.</returns>
-		public static Process? GetParentProcess(int id)
-		{
-			Process process = Process.GetProcessById(id);
-			return GetParentProcess(process.Handle);
-		}
-
-		/// <summary>
-		/// Gets the parent process of a specified process.
-		/// </summary>
-		/// <param name="handle">The process handle.</param>
-		/// <returns>An instance of the Process class.</returns>
-		public static Process? GetParentProcess(IntPtr handle)
-		{
-			ParentProcessUtilities pbi = new ParentProcessUtilities();
-			int returnLength;
-			int status = NtQueryInformationProcess(handle, 0, ref pbi, Marshal.SizeOf(pbi), out returnLength);
-			if (status != 0)
-				throw new Win32Exception(status);
-
-			try
-			{
-				return Process.GetProcessById(pbi.InheritedFromUniqueProcessId.ToInt32());
-			}
-			catch (ArgumentException)
-			{
-				// not found
-				return null;
-			}
-		}
-
-	}
-}