Initial TizenOS receiver commit

receivers/tizen/FCastReceiverService/WebSocketStream.cs

@@ -0,0 +1,49 @@
+using System.IO;
+using System;
+using System.Net.WebSockets;
+using System.Threading;
+
+public class WebSocketStream : Stream
+{
+    private readonly WebSocket _webSocket;
+
+    public WebSocketStream(WebSocket webSocket)
+    {
+        _webSocket = webSocket;
+    }
+
+    public override bool CanRead => true;
+    public override bool CanSeek => false;
+    public override bool CanWrite => true;
+    public override long Length => throw new NotSupportedException();
+    public override long Position
+    {
+        get => throw new NotSupportedException();
+        set => throw new NotSupportedException();
+    }
+
+    public override void Flush() { }
+
+    public override int Read(byte[] buffer, int offset, int count)
+    {
+        var segment = new ArraySegment<byte>(buffer, offset, count);
+        var result = _webSocket.ReceiveAsync(segment, CancellationToken.None).Result;
+        return result.Count;
+    }
+
+    public override void Write(byte[] buffer, int offset, int count)
+    {
+        var segment = new ArraySegment<byte>(buffer, offset, count);
+        _webSocket.SendAsync(segment, WebSocketMessageType.Binary, true, CancellationToken.None).Wait();
+    }
+
+    public override long Seek(long offset, SeekOrigin origin)
+    {
+        throw new NotSupportedException();
+    }
+
+    public override void SetLength(long value)
+    {
+        throw new NotSupportedException();
+    }
+}