1 files changed, 96 insertions, 0 deletions
diff --git a/MediaBrowser.Server.Implementations/LiveTv/TunerHosts/MulticastStream.cs b/MediaBrowser.Server.Implementations/LiveTv/TunerHosts/MulticastStream.cs
new file mode 100644
index 000000000..8ff3fd6c1
--- /dev/null
+++ b/MediaBrowser.Server.Implementations/LiveTv/TunerHosts/MulticastStream.cs
@@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Model.Logging;
+
+namespace MediaBrowser.Server.Implementations.LiveTv.TunerHosts
+{
+    public class MulticastStream
+    {
+        private readonly List<QueueStream> _outputStreams = new List<QueueStream>();
+        private const int BufferSize = 81920;
+        private CancellationToken _cancellationToken;
+        private readonly ILogger _logger;
+
+        public MulticastStream(ILogger logger)
+        {
+            _logger = logger;
+        }
+
+        public async Task CopyUntilCancelled(Stream source, Action onStarted, CancellationToken cancellationToken)
+        {
+            _cancellationToken = cancellationToken;
+
+            while (!cancellationToken.IsCancellationRequested)
+            {
+                byte[] buffer = new byte[BufferSize];
+
+                var bytesRead = await source.ReadAsync(buffer, 0, buffer.Length, cancellationToken).ConfigureAwait(false);
+
+                if (bytesRead > 0)
+                {
+                    byte[] copy = new byte[bytesRead];
+                    Buffer.BlockCopy(buffer, 0, copy, 0, bytesRead);
+                   
+                    List<QueueStream> streams = null;
+
+                    lock (_outputStreams)
+                    {
+                        streams = _outputStreams.ToList();
+                    }
+
+                    foreach (var stream in streams)
+                    {
+                        stream.Queue(copy);
+                    }
+
+                    if (onStarted != null)
+                    {
+                        var onStartedCopy = onStarted;
+                        onStarted = null;
+                        Task.Run(onStartedCopy);
+                    }
+                }
+
+                else
+                {
+                    await Task.Delay(100).ConfigureAwait(false);
+                }
+            }
+        }
+
+        public Task CopyToAsync(Stream stream)
+        {
+            var result = new QueueStream(stream, _logger)
+            {
+                OnFinished = OnFinished
+            };
+
+            lock (_outputStreams)
+            {
+                _outputStreams.Add(result);
+            }
+
+            result.Start(_cancellationToken);
+
+            return result.TaskCompletion.Task;
+        }
+
+        public void RemoveOutputStream(QueueStream stream)
+        {
+            lock (_outputStreams)
+            {
+                _outputStreams.Remove(stream);
+            }
+        }
+
+        private void OnFinished(QueueStream queueStream)
+        {
+            RemoveOutputStream(queueStream);
+        }
+    }
+}