FocusVolumeControlPlugin/src/SoundBrowser/MainWindow.xaml.cs

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
{
	/// <summary>
	/// Interaction logic for MainWindow.xaml
	/// </summary>
	public partial class MainWindow : Window
	{

		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();
		}


	}

}