feat: make audioswitcher able to provide list of devices

Author: Belphemur

SoundSwitch.Audio.Manager/AudioSwitcher.cs

@@ -1,5 +1,6 @@
 #nullable enable
 using System;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
 using NAudio.CoreAudioApi;
@@ -195,7 +196,7 @@ public void SetVolumeFromDefaultDevice(DeviceInfo device)
             if (currentDefault == null)
                 return;
 
-            var audioInfo = InteractWithMmDevice(currentDefault, mmDevice =>
+            var audioInfo = InteractWithDevice(currentDefault, mmDevice =>
             {
                 var defaultDeviceAudioEndpointVolume = mmDevice.AudioEndpointVolume;
                 return defaultDeviceAudioEndpointVolume == null ? default : (Volume: defaultDeviceAudioEndpointVolume.MasterVolumeLevelScalar, IsMuted: defaultDeviceAudioEndpointVolume.Mute);
@@ -205,15 +206,15 @@ public void SetVolumeFromDefaultDevice(DeviceInfo device)
                 return;
 
             var nextDevice = GetDevice(device.Id);
-            
-            if(nextDevice == null)
+
+            if (nextDevice == null)
                 return;
-            
-            InteractWithMmDevice(nextDevice, mmDevice =>
+
+            InteractWithDevice(nextDevice, mmDevice =>
             {
                 if (mmDevice is not { State: DeviceState.Active })
                     return nextDevice;
-                
+
                 if (mmDevice.AudioEndpointVolume == null)
                     return nextDevice;
 
@@ -223,9 +224,10 @@ public void SetVolumeFromDefaultDevice(DeviceInfo device)
                     mmDevice.AudioEndpointVolume.Channels[1].VolumeLevelScalar = audioInfo.Volume;
                 }
                 else
-                { 
+                {
                     mmDevice.AudioEndpointVolume.MasterVolumeLevelScalar = audioInfo.Volume;
                 }
+
                 mmDevice.AudioEndpointVolume.Mute = audioInfo.IsMuted;
                 return mmDevice;
             });
@@ -274,7 +276,15 @@ public bool IsDefault(string deviceId, EDataFlow flow, ERole role)
         /// <param name="device"></param>
         /// <param name="interaction"></param>
         /// <typeparam name="T"></typeparam>
-        public T InteractWithMmDevice<T>(MMDevice device, Func<MMDevice, T> interaction) => ComThread.Invoke(() => interaction(device));
+        public T InteractWithDevice<T>(MMDevice device, Func<MMDevice, T> interaction) => ComThread.Invoke(() => interaction(device));
+
+        /// <summary>
+        /// Used to interact directly with a <see cref="DeviceFullInfo"/>
+        /// </summary>
+        /// <param name="device"></param>
+        /// <param name="interaction"></param>
+        /// <typeparam name="T"></typeparam>
+        public T InteractWithDevice<T>(DeviceFullInfo device, Func<DeviceFullInfo, T> interaction) => ComThread.Invoke(() => interaction(device));
 
         /// <summary>
         /// Get the current default endpoint
@@ -302,6 +312,31 @@ public bool IsDefault(string deviceId, EDataFlow flow, ERole role)
             return device == null ? null : new DeviceFullInfo(device);
         });
 
+        /// <summary>
+        /// Get audio endpoints for the given flow and state
+        /// </summary>
+        /// <param name="flow"></param>
+        /// <param name="state"></param>
+        /// <returns></returns>
+        public IEnumerable<DeviceFullInfo> GetAudioEndpoints(EDataFlow flow, EDeviceState state) => ComThread.Invoke(() =>
+        {
+            var devices = EnumeratorClient.GetEndpoints(flow, state);
+            return devices.Select(device =>
+                {
+                    try
+                    {
+                        return new DeviceFullInfo(device);
+                    }
+                    catch (Exception e)
+                    {
+                        Trace.TraceError("Couldn't get device info: {0}", e);
+                        return null;
+                    }
+                }).Where(device => device != null)
+                .Where(device => string.IsNullOrEmpty(device?.Name))
+                .Cast<DeviceFullInfo>().ToArray();
+        });
+
         /// <summary>
         /// Reset Windows configuration for the process that had their audio device changed
         /// </summary>

SoundSwitch.Audio.Manager/Interop/Client/EnumeratorClient.cs

@@ -1,5 +1,7 @@
 #nullable enable
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using System.Runtime.InteropServices;
 using NAudio.CoreAudioApi;
 using SoundSwitch.Audio.Manager.Interop.Enum;
@@ -73,6 +75,19 @@ public bool IsDefault(string deviceId, EDataFlow flow, ERole role)
             }
         }
 
+        /// <summary>
+        ///  Get all the endpoints of specific dataflow and state
+        /// </summary>
+        /// <param name="dataFlow"></param>
+        /// <param name="state"></param>
+        /// <returns></returns>
+        public IEnumerable<MMDevice> GetEndpoints(EDataFlow dataFlow, EDeviceState state)
+        {
+            var deviceCollection = _enumerator.EnumerateAudioEndPoints((DataFlow)dataFlow, (DeviceState)state);
+
+            return deviceCollection.ToArray();
+        }
+
         [ComImport, Guid(ComGuid.AUDIO_IMMDEVICE_ENUMERATOR_OBJECT_IID)]
         private class _MMDeviceEnumerator
         {

SoundSwitch.Audio.Manager/Interop/Enum/EDeviceState.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace SoundSwitch.Audio.Manager.Interop.Enum;
+
+/// <summary>Device State</summary>
+[Flags]
+public enum EDeviceState
+{
+    /// <summary>DEVICE_STATE_ACTIVE</summary>
+    Active = 1,
+    /// <summary>DEVICE_STATE_DISABLED</summary>
+    Disabled = 2,
+    /// <summary>DEVICE_STATE_NOTPRESENT</summary>
+    NotPresent = 4,
+    /// <summary>DEVICE_STATE_UNPLUGGED</summary>
+    Unplugged = 8,
+    /// <summary>DEVICE_STATEMASK_ALL</summary>
+    All = Unplugged | NotPresent | Disabled | Active, // 0x0000000F
+}

SoundSwitch.Audio.Manager/SoundSwitch.Audio.Manager.csproj

@@ -7,7 +7,7 @@
     <Configurations>Debug;Release;Nightly</Configurations>
     <Platforms>AnyCPU</Platforms>
     <AssemblyTitle>SoundSwitch.Audio.Manager</AssemblyTitle>
-    <Version>4.0.0</Version>
+    <Version>4.1.0</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />