Listen to changes in audio devices and keep track of the default input device

Assets/Scripts/EOSVoiceChat.cs

@@ -12,7 +12,7 @@ using UnityEngine;
 /// This class does not know anything about EOS platform initialization or authentication; it just takes the required
 /// EOS interfaces and exposes a number of game-related voice functions.
 /// </summary>
-public class EOSVoiceChat
+public class EOSVoiceChat: IDisposable
 {
     private const uint DefaultMaxChatPlayers = 16;  // "Lobbies that generate conference rooms must have <= 16 max players"
     
@@ -27,6 +27,10 @@ public class EOSVoiceChat
     private string rtcRoomName;
     public bool IsConnected => lobbyInterface != null && rtcInterface != null && audioInterface != null && !string.IsNullOrEmpty(connectedLobbyId);
 
+    private string defaultInputDeviceId;
+    public bool HasInputDevice => !string.IsNullOrEmpty(defaultInputDeviceId);
+
+    private ulong? onAudioDevicesChangedCallbackId;
     private ulong? onConnectionChangedCallbackId, onParticipantStatusChangedCallbackId, onParticipantUpdatedCallbackId;
 
     /// <summary>
@@ -41,6 +45,14 @@ public class EOSVoiceChat
         this.rtcInterface = rtcInterface;
         this.audioInterface = audioInterface;
         this.localUserProvider = localUserProvider;
+
+        SubscribeToAudioDeviceNotifications();
+    }
+
+    public void Dispose()
+    {
+        DisconnectChat();
+        UnsubscribeFromAudioDeviceNotifications();
     }
 
     /// <summary>
@@ -282,6 +294,48 @@ public class EOSVoiceChat
     
     // TODO: handle input/output device changes (keep track of current devices)
 
+    private void SubscribeToAudioDeviceNotifications()
+    {
+        var localUserId = localUserProvider.Invoke();
+
+        if (!onAudioDevicesChangedCallbackId.HasValue)
+        {
+            onAudioDevicesChangedCallbackId = audioInterface.AddNotifyAudioDevicesChanged(
+                new AddNotifyAudioDevicesChangedOptions(), null,
+                HandleAudioDevicesChanged);
+            
+            // Call the event handler once to query the audio devices in their initial state
+            HandleAudioDevicesChanged(null);
+        }
+    }
+
+    private void UnsubscribeFromAudioDeviceNotifications()
+    {
+        if (onAudioDevicesChangedCallbackId.HasValue)
+        {
+            audioInterface.RemoveNotifyAudioDevicesChanged(onAudioDevicesChangedCallbackId.Value);
+            onAudioDevicesChangedCallbackId = null;
+        }
+    }
+    
+    private void HandleAudioDevicesChanged(AudioDevicesChangedCallbackInfo data)
+    {
+        defaultInputDeviceId = null;
+        
+        // Update the default input device, so we know whether we can actually talk or not
+        uint inputDevicesCount = audioInterface.GetAudioInputDevicesCount(new GetAudioInputDevicesCountOptions());
+        for (uint inputDeviceIndex = 0; inputDeviceIndex < inputDevicesCount; ++inputDeviceIndex)
+        {
+            var inputDeviceInfo = audioInterface.GetAudioInputDeviceByIndex(
+                new GetAudioInputDeviceByIndexOptions { DeviceInfoIndex = inputDeviceIndex });
+
+            if (inputDeviceInfo.DefaultDevice)
+            {
+                defaultInputDeviceId = inputDeviceInfo.DeviceId;
+            }
+        }
+    }
+
     private void SubscribeToRoomNotifications()
     {
         var localUserId = localUserProvider.Invoke();
@@ -370,11 +424,11 @@ public class EOSVoiceChat
         switch (data.ParticipantStatus)
         {
             case RTCParticipantStatus.Joined:
-                if (chatUsers.ContainsKey(data.ParticipantId))
-                    return;
-
-                var chatUser = new ChatUser(data.ParticipantId);
-                chatUsers.Add(data.ParticipantId, chatUser);
+                if (!chatUsers.ContainsKey(data.ParticipantId))
+                {
+                    var chatUser = new ChatUser(data.ParticipantId);
+                    chatUsers.Add(data.ParticipantId, chatUser);
+                }
                 break;
             case RTCParticipantStatus.Left:
                 chatUsers.Remove(data.ParticipantId);

Assets/Scripts/MagnificentVoiceChat.cs

@@ -234,7 +234,7 @@ public class MagnificentVoiceChat : MonoBehaviour
     {
         if (voiceChat != null)
         {
-            voiceChat.DisconnectChat();
+            voiceChat.Dispose();
             voiceChat = null;
         }