Source code for audioendpoints.cs

```
using System;
```
```
using System.Collections.Generic;
```
```
using System.Diagnostics;
```
```
using System.Drawing;
```
```
using System.IO;
```
```
using System.Windows.Forms;
```
```
using NAudio.CoreAudioApi;
```
```
using NAudio.Wave;
```
```
 
```
```
 
```
```
namespace RobvanderWoude
```
```
{
```
```
	internal class AudioEndPoints
```
```
	{
```

		static readonly string progver = "2.00";

```
 
```
```
 
```
```
		#region Global Variables
```
```
 
```
```
		static bool bgcolors = true;
```
```
		static bool fgcolors = false;
```
```
		static bool helprequested = false;
```
```
		static bool stereo = true;
```
```
		static DataGridView datagrid;
```

		static readonly Dictionary<DeviceState, Color> foregroundcolors = new Dictionary<DeviceState, Color>

```
		{
```
```
			[DeviceState.Active] = Color.Green,
```

			[DeviceState.Disabled] = Color.Orange,

			[DeviceState.NotPresent] = Color.SlateGray,

```
			[DeviceState.Unplugged] = Color.Red
```
```
		};
```

		static readonly Dictionary<DeviceState, Color> backgroundcolors = new Dictionary<DeviceState, Color>

```
		{
```

			[DeviceState.Active] = Color.LightGreen,

			[DeviceState.Disabled] = Color.Yellow,

			[DeviceState.NotPresent] = Color.LightGray,

```
			[DeviceState.Unplugged] = Color.Red
```
```
		};
```

		static Dictionary<int, AudioEndPoint> audioendpoints;

```
		static Form form;
```
```
		static int interval = 0;
```
```
		static Timer timer = new Timer( );
```
```
		static WaveIn recorder;
```
```
 
```
```
		#endregion Global Variables
```
```
 
```
```
 
```
```
		[STAThread]
```
```
		static int Main( string[] args )
```
```
		{
```
```
			#region Parse Command Line
```
```
 
```
```
			foreach ( string arg in args )
```
```
			{
```

				string[] kvp = arg.Split( ":=".ToCharArray( ), 2 );

```
				string key = kvp[0].ToUpper( );
```

				string val = ( kvp.Length == 2 ? kvp[1] : string.Empty );

```
				switch ( key )
```
```
				{
```
```
					case "/?":
```
```
						return ShowHelp( true );
```
```
					case "/B":
```
```
						bgcolors = false;
```
```
						fgcolors = false;
```
```
						break;
```
```
					case "/F":
```
```
						bgcolors = false;
```
```
						fgcolors = true;
```
```
						break;
```
```
					case "/M":
```
```
						stereo = false;
```
```
						break;
```
```
					case "/R":
```
```
						interval = 1;
```

						if ( string.IsNullOrWhiteSpace( val ) )

```
						{
```

							if ( !int.TryParse( val, out interval ) )

```
							{
```
```
								interval = 1;
```
```
							}
```
```
						}
```
```
						if ( interval < 0 )
```
```
						{
```
```
							interval = 1;
```
```
						}
```
```
						timer.Interval = interval * 1000;
```
```
						timer.Tick += Timer_Tick;
```
```
						timer.Start( );
```
```
						break;
```
```
					default:
```
```
						return ShowHelp( true );
```
```
				}
```
```
			}
```
```
 
```
```
			#endregion Parse Command Line
```
```
 
```
```
 
```
```
			Application.EnableVisualStyles( );
```
```
 
```
```
			form = new Form
```
```
			{
```
```
				BackColor = Color.White,
```

				Font = new Font( FontFamily.GenericSansSerif, 12 ),

```
				Size = new Size( 1380, 840 ),
```

				StartPosition = FormStartPosition.CenterScreen,

				Text = "AudioEndPoints.exe, \u00A0 Version " + progver + " \u00A0?\u00A0 \u00A0 Copyright \u00A9 2025 Rob van der Woude",

```
				Visible = true
```
```
			};
```

			form.FormClosing += Form_FormClosing;

```
 
```

			audioendpoints = new Dictionary<int, AudioEndPoint>( );

```
			recorder = new WaveIn( );
```
```
			recorder.StartRecording( );
```
```
 
```
```
			SetupDataGrid( );
```
```
			PopulateDataGrid( );
```
```
 
```
```
			while ( form.Enabled )
```
```
			{
```
```
				Application.DoEvents( );
```
```
			}
```
```
 
```
```
			return 0;
```
```
		}
```
```
 
```
```
 
```

		private static void Datagrid_KeyUp( object sender, KeyEventArgs e )

```
		{
```
```
			if ( e.KeyCode == Keys.F1 )
```
```
			{
```
```
				ShowHelp( false );
```
```
			}
```
```
			if ( e.KeyCode == Keys.F5 )
```
```
			{
```
```
				RefreshDataGrid( );
```
```
			}
```
```
			if ( e.KeyCode == Keys.Escape )
```
```
			{
```
```
				form.Close( );
```
```
			}
```

			if ( e.Control && e.KeyCode == Keys.P )

```
			{
```
```
				PrintDataGrid( );
```
```
			}
```

			if ( e.Control && e.KeyCode == Keys.S )

```
			{
```

				string filename = string.Format( "AudioEndPoints.{0}.{1}.txt", Environment.GetEnvironmentVariable( "COMPUTERNAME" ), DateTime.Now.ToString( "yyyy-MM-dd_HHmmss" ) );

				string outfile = Path.Combine( Environment.CurrentDirectory, filename );

```
				SaveDataGrid( outfile );
```

				MessageBox.Show( "Saved as \"" + filename + "\" in folder \"" + Path.GetDirectoryName( outfile ) + "\"", "File Saved", MessageBoxButtons.OK, MessageBoxIcon.Information );

```
			}
```
```
		}
```
```
 
```
```
 
```

		private static void Datagrid_SortCompare( object sender, DataGridViewSortCompareEventArgs e )

```
		{
```
```
			if ( e.Column.Index == 0 )
```
```
			{
```

				e.SortResult = int.Parse( e.CellValue1.ToString( ) ).CompareTo( int.Parse( e.CellValue2.ToString( ) ) );

				e.Handled = true; // skip the default sorting

```
			}
```
```
		}
```
```
 
```
```
 
```

		private static void Form_FormClosing( object sender, FormClosingEventArgs e )

```
		{
```
```
			try
```
```
			{
```
```
				timer.Stop( );
```
```
			}
```
```
			catch { }
```
```
			try
```
```
			{
```
```
				recorder.StopRecording( );
```
```
			}
```
```
			catch { }
```
```
			if ( helprequested )
```
```
			{
```
```
				ShowHelp( true );
```
```
			}
```
```
			form.Enabled = false;
```
```
		}
```
```
 
```
```
 
```

		private static void Timer_Tick( object sender, EventArgs e )

```
		{
```
```
			RefreshDataGrid( );
```
```
		}
```
```
 
```
```
 
```

		private static void InventoryAudioEndPoints( )

```
		{
```

			MMDeviceEnumerator enumerator = new MMDeviceEnumerator( );

```
			int index = 0;
```

			foreach ( MMDevice endpoint in enumerator.EnumerateAudioEndPoints( DataFlow.All, DeviceState.All ) )

```
			{
```

				AudioEndPoint audioendpoint = new AudioEndPoint

```
				{
```
```
					Index = index,
```
```
					InOut = endpoint.DataFlow,
```
```
					Name = endpoint.FriendlyName,
```
```
					State = endpoint.State,
```
```
					ID = endpoint.ID,
```
```
				};
```

				if ( audioendpoint.State == DeviceState.Active )

```
				{
```

					audioendpoint.MasterVolumeLevelScalar = endpoint.AudioEndpointVolume.MasterVolumeLevelScalar;

					audioendpoint.MasterPeakValue = endpoint.AudioMeterInformation.MasterPeakValue;

					audioendpoint.PeakValues = endpoint.AudioMeterInformation.PeakValues;

```
				}
```
```
				else
```
```
				{
```

					audioendpoint.MasterVolumeLevelScalar = 0f;

					audioendpoint.MasterPeakValue = 0f;

```
					audioendpoint.PeakValues = null;
```
```
				}
```

				audioendpoints[index] = audioendpoint;

```
				index++;
```
```
			}
```
```
		}
```
```
 
```
```
 
```

		private static void PopulateDataGrid( )

```
		{
```
```
			InventoryAudioEndPoints( );
```

			foreach ( AudioEndPoint endpoint in audioendpoints.Values )

```
			{
```
```
				PopulateDataGridRow( endpoint );
```
```
			}
```

			for ( int i = 0; i < datagrid.ColumnCount; i++ )

```
			{
```

				if ( i == datagrid.ColumnCount - 1 )

```
				{
```

					datagrid.Columns[i].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;

```
				}
```
```
				else
```
```
				{
```

					datagrid.Columns[i].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;

```
				}
```
```
			}
```
```
		}
```
```
 
```
```
 
```

		private static void PopulateDataGridRow( AudioEndPoint endpoint )

```
		{
```
```
			string[] line;
```
```
			if ( stereo )
```
```
			{
```

				line = new string[] { endpoint.Index.ToString( ), ( endpoint.InOut == DataFlow.Capture ? "IN" : "OUT" ), endpoint.Name, endpoint.State.ToString( ), endpoint.ID, endpoint.GetVolume( ), endpoint.GetPeakLevel( 0 ), endpoint.GetPeakLevel( 1 ) };

```
			}
```
```
			else
```
```
			{
```

				line = new string[] { endpoint.Index.ToString( ), ( endpoint.InOut == DataFlow.Capture ? "IN" : "OUT" ), endpoint.Name, endpoint.State.ToString( ), endpoint.ID, endpoint.GetVolume( ), endpoint.GetPeakLevel( -1 ) };

```
			}
```
```
			int row;
```

			if ( endpoint.Index < datagrid.Rows.Count - 1 )

```
			{
```
```
				row = endpoint.Index;
```

				datagrid.Rows[row].SetValues( line );

```
			}
```
```
			else
```
```
			{
```
```
				row = datagrid.Rows.Count - 1;
```
```
				datagrid.Rows.Add( line );
```
```
			}
```
```
			if ( bgcolors )
```
```
			{
```

				datagrid.Rows[row].DefaultCellStyle.BackColor = backgroundcolors[endpoint.State];

```
			}
```
```
			if ( fgcolors )
```
```
			{
```

				datagrid.Rows[row].DefaultCellStyle.ForeColor = foregroundcolors[endpoint.State];

```
			}
```
```
		}
```
```
 
```
```
 
```
```
		private static void PrintDataGrid( )
```
```
		{
```

			string printout = Path.GetTempFileName( );

```
			SaveDataGrid( printout );
```

			ProcessStartInfo psi = new ProcessStartInfo

```
			{
```
```
				UseShellExecute = false,
```

				Arguments = string.Format( "/p \"{0}\"", printout ),

```
				FileName = "notepad.exe"
```
```
			};
```
```
			Process proc = Process.Start( psi );
```
```
			proc.WaitForExit( );
```
```
			File.Delete( printout );
```
```
		}
```
```
 
```
```
 
```

		private static void RefreshDataGrid( )

```
		{
```
```
			PopulateDataGrid( );
```
```
		}
```
```
 
```
```
 
```

		private static void SaveDataGrid( string outfile )

```
		{
```
```
			// line out colums
```
```
			int[] cw;
```
```
			if ( stereo )
```
```
			{
```

				cw = new int[] { 5, 6, 0, 0, 0, 6, 6, 6 };

```
			}
```
```
			else
```
```
			{
```

				cw = new int[] { 5, 6, 0, 0, 0, 6, 4 };

```
			}
```

			for ( int i = 0; i < datagrid.Columns.Count; i++ )

```
			{
```

				for ( int j = 0; j < datagrid.Rows.Count; j++ )

```
				{
```

					if ( datagrid.Rows[j].Cells[i].Value != null && datagrid.Rows[j].Cells[i].Value.ToString( ).Length > cw[i] )

```
					{
```

						cw[i] = datagrid.Rows[j].Cells[i].Value.ToString( ).Length;

```
					}
```
```
				}
```
```
			}
```
```
 
```
```
			// format printout
```

			List<string> lines = new List<string>( );

```
			string linetemplate;
```
```
			if ( stereo )
```
```
			{
```

				linetemplate = "{0,-" + cw[0] + "}    {1,-" + cw[1] + "}    {2,-" + cw[2] + "}    {3,-" + cw[3] + "}    {4,-" + cw[4] + "}    {5," + cw[5] + "}    {6," + cw[6] + "}    {7," + cw[7] + "}";

```
			}
```
```
			else
```
```
			{
```

				linetemplate = "{0,-" + cw[0] + "}    {1,-" + cw[1] + "}    {2,-" + cw[2] + "}    {3,-" + cw[3] + "}    {4,-" + cw[4] + "}    {5," + cw[5] + "}    {6," + cw[6] + "}";

```
			}
```
```
			// header
```
```
			var cols = datagrid.Columns;
```
```
			string headerline;
```
```
			if ( stereo )
```
```
			{
```

				headerline = string.Format( linetemplate, cols[0].HeaderText, cols[1].HeaderText.Replace( "\u00A0", "" ), cols[2].HeaderText, cols[3].HeaderText, cols[4].HeaderText, cols[5].HeaderText, cols[6].HeaderText, cols[7].HeaderText );

```
			}
```
```
			else
```
```
			{
```

				headerline = string.Format( linetemplate, cols[0].HeaderText, cols[1].HeaderText.Replace( "\u00A0", "" ), cols[2].HeaderText, cols[3].HeaderText, cols[4].HeaderText, cols[5].HeaderText, cols[6].HeaderText );

```
			}
```
```
			lines.Add( headerline );
```
```
			// rows
```

			for ( int i = 0; i < datagrid.Rows.Count; i++ )

```
			{
```
```
				var cells = datagrid.Rows[i].Cells;
```
```
				string line;
```
```
				if ( stereo )
```
```
				{
```

					line = string.Format( linetemplate, cells[0].Value, cells[1].Value, cells[2].Value, cells[3].Value, cells[4].Value, cells[5].Value, cells[6].Value, cells[7].Value );

```
 
```
```
				}
```
```
				else
```
```
				{
```

					line = string.Format( linetemplate, cells[0].Value, cells[1].Value, cells[2].Value, cells[3].Value, cells[4].Value, cells[5].Value, cells[6].Value );

```
				}
```
```
				lines.Add( line );
```
```
			}
```
```
 
```

			using ( StreamWriter print = new StreamWriter( outfile ) )

```
			{
```

				for ( int i = 0; i < lines.Count; i++ )

```
				{
```
```
					print.WriteLine( lines[i] );
```
```
				}
```
```
			}
```
```
		}
```
```
 
```
```
 
```
```
		private static void SetupDataGrid( )
```
```
		{
```
```
			datagrid = new DataGridView
```
```
			{
```
```
				Location = new Point( 0, 0 ),
```
```
				Size = new Size( 1200, 250 ),
```

				AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.DisplayedCellsExceptHeaders,

				ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single,

				CellBorderStyle = DataGridViewCellBorderStyle.Single,

```
				GridColor = Color.Black,
```
```
				RowHeadersVisible = false,
```

				SelectionMode = DataGridViewSelectionMode.FullRowSelect,

```
				MultiSelect = false,
```
```
				Dock = DockStyle.Fill
```
```
			};
```
```
			if ( stereo )
```
```
			{
```
```
				datagrid.ColumnCount = 8;
```
```
			}
```
```
			else
```
```
			{
```
```
				datagrid.ColumnCount = 7;
```
```
				form.Width -= 85;
```
```
			}
```

			datagrid.ColumnHeadersDefaultCellStyle.BackColor = Color.Navy;

			datagrid.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;

			datagrid.ColumnHeadersDefaultCellStyle.Font = new Font( FontFamily.GenericSansSerif, 12, FontStyle.Bold );

```
			datagrid.Columns[0].Name = "Index";
```

			datagrid.Columns[1].Name = "In\u00A0/\u00A0Out";

```
			datagrid.Columns[2].Name = "Name";
```
```
			datagrid.Columns[3].Name = "Status";
```
```
			datagrid.Columns[4].Name = "ID";
```
```
			datagrid.Columns[5].Name = "Volume";
```

			datagrid.Columns[5].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight;

```
			if ( stereo )
```
```
			{
```

				datagrid.Columns[6].Name = "Peak\u00A0L";

				datagrid.Columns[6].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight;

				datagrid.Columns[7].Name = "Peak\u00A0R";

				datagrid.Columns[7].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight;

```
			}
```
```
			else
```
```
			{
```
```
				datagrid.Columns[6].Name = "Peak";
```

				datagrid.Columns[6].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight;

```
			}
```
```
			datagrid.KeyUp += Datagrid_KeyUp;
```

			datagrid.SortCompare += Datagrid_SortCompare;

```
 
```
```
			form.Controls.Add( datagrid );
```
```
			datagrid.Focus( );
```
```
		}
```
```
 
```
```
 
```

		private static int ShowHelp( bool cli = false )

```
		{
```

			string message = string.Format( "\nAudioEndPoints.exe,  Version {0}\n", progver );

			message += "List the local computer's audio endpoints\n\n";

			message += "Usage:\tAudioEndPoints.exe\t[ /? ]  [ /F | /B ]  [ /M ]  [ /R[:nn] ]\n\n";

			message += "Where:\t                  \t/?     \tdisplay this help text and exit\n";

			message += "      \t                  \t/F     \tuse status dependent\n";

			message += "      \t                  \t       \tFOREGROUND colors,\n";

			message += "      \t                  \t/B     \tuse BLACK and WHITE,\n";

			message += "      \t                  \t       \tdefault is status dependent\n";

			message += "      \t                  \t       \tBACKGROUND colors\n";

			message += "      \t                  \t/M     \tpeak levels for L and R combined,\n";

			message += "      \t                  \t       \tdefault is separate peak levels\n";

			message += "      \t                  \t/R[:nn]\trefresh values every nn seconds,\n";

			message += "      \t                  \t       \tdefault interval is 1 second\n\n";

			message += "Click on ANY column header to sort the table by that column.\n";

			message += "Note that the table's sort order will be reset to its default at\n";

			message += "every refresh, be it by pressing F5 or by specifying a refresh\n";

			message += "interval with the /R command line switch.\n";

			message += "You can edit all cells, if you like.\n\n";

			message += "Keys:   \tCtrl+C will copy the SELECTED LINE to the clipboard,\n";

			message += "        \tCtrl+P will print the list,\n";

			message += "        \tCtrl+S will save it in a text file,\n";

			message += "        \tF1 will show this help text,\n";

			message += "        \tF5 will refresh volume and peak level values,\n";

			message += "        \tEscape will abort the program.\n\n";

			message += "Credits:\tTo access audio endpoints, this program uses\n";

			message += "        \tNAudio created by Mark Heath:\n";

			message += "        \thttps://github.com/naudio/NAudio\n";

			message += "        \tVolume reading based on code by Mike de Klerk:\n";

			message += "        \thttps://stackoverflow.com/a/12534584\n\n";

			message += "Written by Rob van der Woude\n";

			message += "https://www.robvanderwoude.com\n";

```
 
```
```
			if ( cli )
```
```
			{
```
```
				Console.Error.WriteLine( message );
```
```
				Environment.Exit( -1 );
```
```
				Application.Exit( );
```
```
			}
```
```
			else
```
```
			{
```
```
				helprequested = true;
```

				MessageBox.Show( message, "AudioEndPoints.exe, \u00A0 Version " + progver );

```
			}
```
```
			return -1;
```
```
		}
```
```
	}
```
```
 
```
```
 
```
```
	public class AudioEndPoint
```
```
	{
```
```
		public int Index
```
```
		{
```
```
			get; set;
```
```
		}
```
```
 
```
```
		public DataFlow InOut
```
```
		{
```
```
			get; set;
```
```
		}
```
```
 
```
```
		public string Name
```
```
		{
```
```
			get; set;
```
```
		}
```
```
 
```
```
		public DeviceState State
```
```
		{
```
```
			get; set;
```
```
		}
```
```
 
```
```
		public string ID
```
```
		{
```
```
			get; set;
```
```
		}
```
```
 
```
```
		public float MasterVolumeLevelScalar
```
```
		{
```
```
			get; set;
```
```
		}
```
```
 
```
```
		public float MasterPeakValue
```
```
		{
```
```
			get; set;
```
```
		}
```
```
 
```

		public AudioMeterInformationChannels PeakValues

```
		{
```
```
			get; set;
```
```
		}
```
```
 
```
```
		public string GetVolume( )
```
```
		{
```
```
			if ( State == DeviceState.Active )
```
```
			{
```

				return string.Format( "{0} %", (int)( MasterVolumeLevelScalar * 100 ) );

```
			}
```
```
			else
```
```
			{
```
```
				return string.Empty;
```
```
			}
```
```
		}
```
```
 
```

		public string GetPeakLevel( int channel = -1 )

```
		{
```
```
			if ( State == DeviceState.Active )
```
```
			{
```
```
				switch ( channel )
```
```
				{
```
```
					case 0:
```

						return string.Format( "{0} %", (int)( 100 * float.Parse( PeakValues[0].ToString( ) ) ) );

```
					case 1:
```

						return string.Format( "{0} %", (int)( 100 * float.Parse( PeakValues[1].ToString( ) ) ) );

```
					default:
```

						return string.Format( "{0} %", (int)( 100 * MasterPeakValue ) );

```
				}
```
```
			}
```
```
			else
```
```
			{
```
```
				return string.Empty;
```
```
			}
```
```
		}
```
```
	}
```
```
}
```