feature: Add GetStreams to AudioClient (#1588)

* Added GetStreams

* Change return type

* Change return type on the interface

Co-authored-by: Paulo <pnmanjos@hotmail.com>

src/Discord.Net.Core/Audio/IAudioClient.cs

@@ -1,4 +1,5 @@
-using System;
+using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace Discord.Audio
@@ -20,6 +21,9 @@ public interface IAudioClient : IDisposable
         /// <summary> Gets the estimated round-trip latency, in milliseconds, to the voice UDP server. </summary>
         int UdpLatency { get; }
 
+        /// <summary>Gets the current audio streams.</summary>
+        IReadOnlyDictionary<ulong, AudioInStream> GetStreams();
+
         Task StopAsync();
         Task SetSpeakingAsync(bool value);
 

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

@@ -99,6 +99,12 @@ internal async Task StartAsync(string url, ulong userId, string sessionId, strin
             _token = token;
             await _connection.StartAsync().ConfigureAwait(false);
         }
+
+        public IReadOnlyDictionary<ulong, AudioInStream> GetStreams()
+        {
+            return _streams.ToDictionary(pair => pair.Key, pair => pair.Value.Reader);
+        }
+
         public async Task StopAsync()
         {
             await _connection.StopAsync().ConfigureAwait(false);
@@ -379,7 +385,7 @@ private async Task ProcessPacketAsync(byte[] packet)
 
         private async Task RunHeartbeatAsync(int intervalMillis, CancellationToken cancelToken)
         {
-            //TODO: Clean this up when Discord's session patch is live
+            // TODO: Clean this up when Discord's session patch is live
             try
             {
                 await _audioLogger.DebugAsync("Heartbeat Started").ConfigureAwait(false);