More audio cleanup, finished receive streams

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

@@ -1,6 +1,7 @@
 using System;
 using System.IO;
 using System.Threading;
+using System.Threading.Tasks;
 
 namespace Discord.Audio
 {
@@ -10,6 +11,16 @@ namespace Discord.Audio
         public override bool CanSeek => false;
         public override bool CanWrite => true;
 
+        public abstract Task<RTPFrame?> ReadFrameAsync(CancellationToken cancelToken);
+
+        public RTPFrame? ReadFrame()
+        {
+            return ReadFrameAsync(CancellationToken.None).GetAwaiter().GetResult();
+        }
+        public override int Read(byte[] buffer, int offset, int count)
+        {
+            return ReadAsync(buffer, offset, count, CancellationToken.None).GetAwaiter().GetResult();
+        }
         public override void Write(byte[] buffer, int offset, int count)
         {
             WriteAsync(buffer, offset, count, CancellationToken.None).GetAwaiter().GetResult();

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

@@ -0,0 +1,16 @@
+namespace Discord.Audio
+{
+    public struct RTPFrame
+    {
+        public readonly ushort Sequence;
+        public readonly uint Timestamp;
+        public readonly byte[] Payload;
+
+        public RTPFrame(ushort sequence, uint timestamp, byte[] payload)
+        {
+            Sequence = sequence;
+            Timestamp = timestamp;
+            Payload = payload;
+        }
+    }
+}