Prevent duplicate incoming stream events on connect

src/Discord.Net.WebSocket/Audio/AudioClient.cs

@@ -47,15 +47,17 @@ namespace Discord.Audio
         public SocketGuild Guild { get; }
         public DiscordVoiceAPIClient ApiClient { get; private set; }
         public int Latency { get; private set; }
+        public ulong ChannelId { get; internal set; }
 
         private DiscordSocketClient Discord => Guild.Discord;
         public ConnectionState ConnectionState => _connection.State;
 
         /// <summary> Creates a new REST/WebSocket discord client. </summary>
-        internal AudioClient(SocketGuild guild, int id)
+        internal AudioClient(SocketGuild guild, int clientId, ulong channelId)
         {
             Guild = guild;
-            _audioLogger = Discord.LogManager.CreateLogger($"Audio #{id}");
+            ChannelId = channelId;
+            _audioLogger = Discord.LogManager.CreateLogger($"Audio #{clientId}");
 
             ApiClient = new DiscordVoiceAPIClient(guild.Id, Discord.WebSocketProvider, Discord.UdpSocketProvider);
             ApiClient.SentGatewayMessage += async opCode => await _audioLogger.DebugAsync($"Sent {opCode}").ConfigureAwait(false);

src/Discord.Net.WebSocket/Entities/Guilds/SocketGuild.cs

@@ -433,7 +433,13 @@ namespace Discord.WebSocket
             if (_audioClient != null && before.VoiceChannel?.Id != after.VoiceChannel?.Id)
             {
                 if (model.UserId == CurrentUser.Id)
-                    await RepopulateAudioStreamsAsync().ConfigureAwait(false);
+                {
+                    if (after.VoiceChannel != null && _audioClient.ChannelId != after.VoiceChannel?.Id)
+                    {
+                        _audioClient.ChannelId = after.VoiceChannel.Id;
+                        await RepopulateAudioStreamsAsync().ConfigureAwait(false);
+                    }
+                }
                 else
                 {
                     await _audioClient.RemoveInputStreamAsync(model.UserId).ConfigureAwait(false); //User changed channels, end their stream
@@ -480,7 +486,7 @@ namespace Discord.WebSocket
 
                 if (_audioClient == null)
                 {
-                    var audioClient = new AudioClient(this, Discord.GetAudioId());
+                    var audioClient = new AudioClient(this, Discord.GetAudioId(), channelId);
                     audioClient.Disconnected += async ex =>
                     {
                         if (!promise.Task.IsCompleted)