Merge pull request #2685 from MediaBrowser/beta

Beta

Emby.Common.Implementations/Net/UdpSocket.cs

@@ -128,6 +128,11 @@ namespace Emby.Common.Implementations.Net
             return _Socket.BeginReceiveFrom(buffer, offset, count, SocketFlags.None, ref receivedFromEndPoint, callback, buffer);
         }
 
+        public int Receive(byte[] buffer, int offset, int count)
+        {
+            return _Socket.Receive(buffer, 0, buffer.Length, SocketFlags.None);
+        }
+
         public SocketReceiveResult EndReceive(IAsyncResult result)
         {
             IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);

Emby.Server.Implementations/LiveTv/EmbyTV/DirectRecorder.cs

@@ -94,17 +94,13 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
         }
 
         private const int BufferSize = 81920;
-        public static Task CopyUntilCancelled(Stream source, Stream target, CancellationToken cancellationToken)
-        {
-            return CopyUntilCancelled(source, target, null, cancellationToken);
-        }
-        public static async Task CopyUntilCancelled(Stream source, Stream target, Action onStarted, CancellationToken cancellationToken)
+        public static async Task CopyUntilCancelled(Stream source, Stream target, CancellationToken cancellationToken)
         {
+            byte[] buffer = new byte[BufferSize];
+
             while (!cancellationToken.IsCancellationRequested)
             {
-                var bytesRead = await CopyToAsyncInternal(source, target, BufferSize, onStarted, cancellationToken).ConfigureAwait(false);
-
-                onStarted = null;
+                var bytesRead = await CopyToAsyncInternal(source, target, buffer, cancellationToken).ConfigureAwait(false);
 
                 //var position = fs.Position;
                 //_logger.Debug("Streamed {0} bytes to position {1} from file {2}", bytesRead, position, path);
@@ -116,23 +112,16 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             }
         }
 
-        private static async Task<int> CopyToAsyncInternal(Stream source, Stream destination, Int32 bufferSize, Action onStarted, CancellationToken cancellationToken)
+        private static async Task<int> CopyToAsyncInternal(Stream source, Stream destination, byte[] buffer, CancellationToken cancellationToken)
         {
-            byte[] buffer = new byte[bufferSize];
             int bytesRead;
             int totalBytesRead = 0;
 
             while ((bytesRead = await source.ReadAsync(buffer, 0, buffer.Length, cancellationToken).ConfigureAwait(false)) != 0)
             {
-                await destination.WriteAsync(buffer, 0, bytesRead, cancellationToken).ConfigureAwait(false);
+                destination.Write(buffer, 0, bytesRead);
 
                 totalBytesRead += bytesRead;
-
-                if (onStarted != null)
-                {
-                    onStarted();
-                }
-                onStarted = null;
             }
 
             return totalBytesRead;

Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunHost.cs

@@ -423,7 +423,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
                 IsInfiniteStream = true,
                 IgnoreDts = true,
                 //IgnoreIndex = true,
-                ReadAtNativeFramerate = true
+                //ReadAtNativeFramerate = true
             };
 
             mediaSource.InferTotalBitrate();

Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunHttpStream.cs

@@ -12,6 +12,8 @@ using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Logging;
 using MediaBrowser.Model.MediaInfo;
 using MediaBrowser.Model.System;
+using System.Globalization;
+using MediaBrowser.Controller.IO;
 
 namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
 {
@@ -24,7 +26,10 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
         private readonly CancellationTokenSource _liveStreamCancellationTokenSource = new CancellationTokenSource();
         private readonly TaskCompletionSource<bool> _liveStreamTaskCompletionSource = new TaskCompletionSource<bool>();
 
+        private readonly MulticastStream _multicastStream;
+
         private readonly string _tempFilePath;
+        private bool _enableFileBuffer = false;
 
         public HdHomerunHttpStream(MediaSourceInfo mediaSource, string originalStreamId, IFileSystem fileSystem, IHttpClient httpClient, ILogger logger, IServerApplicationPaths appPaths, IServerApplicationHost appHost, IEnvironmentInfo environment)
             : base(mediaSource, environment, fileSystem)
@@ -34,6 +39,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
             _appHost = appHost;
             OriginalStreamId = originalStreamId;
 
+            _multicastStream = new MulticastStream(_logger);
             _tempFilePath = Path.Combine(appPaths.TranscodingTempPath, UniqueId + ".ts");
         }
 
@@ -101,13 +107,17 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
                             {
                                 _logger.Info("Beginning multicastStream.CopyUntilCancelled");
 
-                                FileSystem.CreateDirectory(FileSystem.GetDirectoryName(_tempFilePath));
-                                using (var fileStream = FileSystem.GetFileStream(_tempFilePath, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read, FileOpenOptions.Asynchronous))
+                                if (_enableFileBuffer)
                                 {
-                                    ResolveAfterDelay(3000, openTaskCompletionSource);
-
-                                    //await response.Content.CopyToAsync(fileStream, 81920, cancellationToken).ConfigureAwait(false);
-                                    await AsyncStreamCopier.CopyStream(response.Content, fileStream, 81920, 4, cancellationToken).ConfigureAwait(false);
+                                    FileSystem.CreateDirectory(FileSystem.GetDirectoryName(_tempFilePath));
+                                    using (var fileStream = FileSystem.GetFileStream(_tempFilePath, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read, FileOpenOptions.None))
+                                    {
+                                        StreamHelper.CopyTo(response.Content, fileStream, 81920, () => Resolve(openTaskCompletionSource), cancellationToken);
+                                    }
+                                }
+                                else
+                                {
+                                    await _multicastStream.CopyUntilCancelled(response.Content, () => Resolve(openTaskCompletionSource), cancellationToken).ConfigureAwait(false);
                                 }
                             }
                         }
@@ -132,58 +142,70 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
                 }
 
                 _liveStreamTaskCompletionSource.TrySetResult(true);
-                await DeleteTempFile(_tempFilePath).ConfigureAwait(false);
+                //await DeleteTempFile(_tempFilePath).ConfigureAwait(false);
             });
         }
 
-        private void ResolveAfterDelay(int delayMs, TaskCompletionSource<bool> openTaskCompletionSource)
+        private void Resolve(TaskCompletionSource<bool> openTaskCompletionSource)
         {
-            Task.Run(async () =>
+            Task.Run(() =>
             {
-                await Task.Delay(delayMs).ConfigureAwait(false);
                 openTaskCompletionSource.TrySetResult(true);
             });
         }
 
         public Task CopyToAsync(Stream stream, CancellationToken cancellationToken)
         {
-            return CopyFileTo(_tempFilePath, false, stream, cancellationToken);
+            if (_enableFileBuffer)
+            {
+                return CopyFileTo(_tempFilePath, stream, cancellationToken);
+            }
+            return _multicastStream.CopyToAsync(stream, cancellationToken);
+            //return CopyFileTo(_tempFilePath, stream, cancellationToken);
         }
 
-        protected async Task CopyFileTo(string path, bool allowEndOfFile, Stream outputStream, CancellationToken cancellationToken)
+        protected async Task CopyFileTo(string path, Stream outputStream, CancellationToken cancellationToken)
         {
-            var eofCount = 0;
-
-            long startPosition = -25000;
+            long startPosition = -20000;
             if (startPosition < 0)
             {
                 var length = FileSystem.GetFileInfo(path).Length;
                 startPosition = Math.Max(length - startPosition, 0);
             }
 
-            using (var inputStream = GetInputStream(path, startPosition, true))
+            _logger.Info("Live stream starting position is {0} bytes", startPosition.ToString(CultureInfo.InvariantCulture));
+
+            var allowAsync = Environment.OperatingSystem != MediaBrowser.Model.System.OperatingSystem.Windows;
+            // use non-async filestream along with read due to https://github.com/dotnet/corefx/issues/6039
+
+            using (var inputStream = GetInputStream(path, startPosition, allowAsync))
             {
                 if (startPosition > 0)
                 {
                     inputStream.Position = startPosition;
                 }
 
-                while (eofCount < 20 || !allowEndOfFile)
+                while (!cancellationToken.IsCancellationRequested)
                 {
-                    var bytesRead = await AsyncStreamCopier.CopyStream(inputStream, outputStream, 81920, 4, cancellationToken).ConfigureAwait(false);
+                    long bytesRead;
+
+                    if (allowAsync)
+                    {
+                        bytesRead = await AsyncStreamCopier.CopyStream(inputStream, outputStream, 81920, 2, cancellationToken).ConfigureAwait(false);
+                    }
+                    else
+                    {
+                        StreamHelper.CopyTo(inputStream, outputStream, 81920, cancellationToken);
+                        bytesRead = 1;
+                    }
 
                     //var position = fs.Position;
                     //_logger.Debug("Streamed {0} bytes to position {1} from file {2}", bytesRead, position, path);
 
                     if (bytesRead == 0)
                     {
-                        eofCount++;
                         await Task.Delay(100, cancellationToken).ConfigureAwait(false);
                     }
-                    else
-                    {
-                        eofCount = 0;
-                    }
                 }
             }
         }

Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunUdpStream.cs

@@ -16,6 +16,8 @@ using MediaBrowser.Model.Logging;
 using MediaBrowser.Model.MediaInfo;
 using MediaBrowser.Model.Net;
 using MediaBrowser.Model.System;
+using System.Globalization;
+using MediaBrowser.Controller.IO;
 
 namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
 {
@@ -32,6 +34,8 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
         private readonly INetworkManager _networkManager;
 
         private readonly string _tempFilePath;
+        private bool _enableFileBuffer = false;
+        private readonly MulticastStream _multicastStream;
 
         public HdHomerunUdpStream(MediaSourceInfo mediaSource, string originalStreamId, IHdHomerunChannelCommands channelCommands, int numTuners, IFileSystem fileSystem, IHttpClient httpClient, ILogger logger, IServerApplicationPaths appPaths, IServerApplicationHost appHost, ISocketFactory socketFactory, INetworkManager networkManager, IEnvironmentInfo environment)
             : base(mediaSource, environment, fileSystem)
@@ -44,6 +48,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
             _channelCommands = channelCommands;
             _numTuners = numTuners;
             _tempFilePath = Path.Combine(appPaths.TranscodingTempPath, UniqueId + ".ts");
+            _multicastStream = new MulticastStream(_logger);
         }
 
         protected override async Task OpenInternal(CancellationToken openCancellationToken)
@@ -121,10 +126,17 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
 
                                 if (!cancellationToken.IsCancellationRequested)
                                 {
-                                    FileSystem.CreateDirectory(FileSystem.GetDirectoryName(_tempFilePath));
-                                    using (var fileStream = FileSystem.GetFileStream(_tempFilePath, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read, FileOpenOptions.Asynchronous))
+                                    if (_enableFileBuffer)
                                     {
-                                        await CopyTo(udpClient, fileStream, openTaskCompletionSource, cancellationToken).ConfigureAwait(false);
+                                        FileSystem.CreateDirectory(FileSystem.GetDirectoryName(_tempFilePath));
+                                        using (var fileStream = FileSystem.GetFileStream(_tempFilePath, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read, FileOpenOptions.None))
+                                        {
+                                            CopyTo(udpClient, fileStream, openTaskCompletionSource, cancellationToken);
+                                        }
+                                    }
+                                    else
+                                    {
+                                        await _multicastStream.CopyUntilCancelled(new UdpClientStream(udpClient), () => Resolve(openTaskCompletionSource), cancellationToken).ConfigureAwait(false);
                                     }
                                 }
                             }
@@ -166,80 +178,111 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
            });
         }
 
-        public Task CopyToAsync(Stream stream, CancellationToken cancellationToken)
+        public async Task CopyToAsync(Stream outputStream, CancellationToken cancellationToken)
         {
-            return CopyFileTo(_tempFilePath, false, stream, cancellationToken);
-        }
+            if (!_enableFileBuffer)
+            {
+                await _multicastStream.CopyToAsync(outputStream, cancellationToken).ConfigureAwait(false);
+                return;
+            }
 
-        protected async Task CopyFileTo(string path, bool allowEndOfFile, Stream outputStream, CancellationToken cancellationToken)
-        {
-            var eofCount = 0;
+            var path = _tempFilePath;
 
-            long startPosition = -25000;
+            long startPosition = -20000;
             if (startPosition < 0)
             {
                 var length = FileSystem.GetFileInfo(path).Length;
                 startPosition = Math.Max(length - startPosition, 0);
             }
 
-            using (var inputStream = GetInputStream(path, startPosition, true))
+            _logger.Info("Live stream starting position is {0} bytes", startPosition.ToString(CultureInfo.InvariantCulture));
+
+            var allowAsync = Environment.OperatingSystem != MediaBrowser.Model.System.OperatingSystem.Windows;
+            // use non-async filestream along with read due to https://github.com/dotnet/corefx/issues/6039
+
+            using (var inputStream = GetInputStream(path, startPosition, allowAsync))
             {
                 if (startPosition > 0)
                 {
                     inputStream.Position = startPosition;
                 }
 
-                while (eofCount < 20 || !allowEndOfFile)
+                while (!cancellationToken.IsCancellationRequested)
                 {
-                    var bytesRead = await AsyncStreamCopier.CopyStream(inputStream, outputStream, 81920, 4, cancellationToken).ConfigureAwait(false);
+                    long bytesRead;
+
+                    if (allowAsync)
+                    {
+                        bytesRead = await AsyncStreamCopier.CopyStream(inputStream, outputStream, 81920, 2, cancellationToken).ConfigureAwait(false);
+                    }
+                    else
+                    {
+                        StreamHelper.CopyTo(inputStream, outputStream, 81920, cancellationToken);
+                        bytesRead = 1;
+                    }
 
                     //var position = fs.Position;
                     //_logger.Debug("Streamed {0} bytes to position {1} from file {2}", bytesRead, position, path);
 
                     if (bytesRead == 0)
                     {
-                        eofCount++;
                         await Task.Delay(100, cancellationToken).ConfigureAwait(false);
                     }
-                    else
-                    {
-                        eofCount = 0;
-                    }
                 }
             }
         }
 
         private static int RtpHeaderBytes = 12;
-        private Task CopyTo(ISocket udpClient, Stream outputStream, TaskCompletionSource<bool> openTaskCompletionSource, CancellationToken cancellationToken)
+        private void CopyTo(ISocket udpClient, Stream target, TaskCompletionSource<bool> openTaskCompletionSource, CancellationToken cancellationToken)
         {
-            return CopyStream(_socketFactory.CreateNetworkStream(udpClient, false), outputStream, 81920, 4, openTaskCompletionSource, cancellationToken);
-        }
+            var source = _socketFactory.CreateNetworkStream(udpClient, false);
+            var bufferSize = 81920;
 
-        private Task CopyStream(Stream source, Stream target, int bufferSize, int bufferCount, TaskCompletionSource<bool> openTaskCompletionSource, CancellationToken cancellationToken)
-        {
-            var copier = new AsyncStreamCopier(source, target, 0, cancellationToken, false, bufferSize, bufferCount);
-            copier.IndividualReadOffset = RtpHeaderBytes;
+            byte[] buffer = new byte[bufferSize];
+            int read;
+            var resolved = false;
 
-            var taskCompletion = new TaskCompletionSource<long>();
+            while ((read = source.Read(buffer, 0, buffer.Length)) != 0)
+            {
+                cancellationToken.ThrowIfCancellationRequested();
 
-            copier.TaskCompletionSource = taskCompletion;
+                read -= RtpHeaderBytes;
 
-            var result = copier.BeginCopy(StreamCopyCallback, copier);
+                if (read > 0)
+                {
+                    target.Write(buffer, RtpHeaderBytes, read);
+                }
 
-            if (openTaskCompletionSource != null)
-            {
-                Resolve(openTaskCompletionSource);
-                openTaskCompletionSource = null;
+                if (!resolved)
+                {
+                    resolved = true;
+                    Resolve(openTaskCompletionSource);
+                }
             }
 
-            if (result.CompletedSynchronously)
-            {
-                StreamCopyCallback(result);
-            }
+            //var copier = new AsyncStreamCopier(source, target, 0, cancellationToken, false, bufferSize, bufferCount);
+            //copier.IndividualReadOffset = RtpHeaderBytes;
+
+            //var taskCompletion = new TaskCompletionSource<long>();
+
+            //copier.TaskCompletionSource = taskCompletion;
+
+            //var result = copier.BeginCopy(StreamCopyCallback, copier);
 
-            cancellationToken.Register(() => taskCompletion.TrySetCanceled());
+            //if (openTaskCompletionSource != null)
+            //{
+            //    Resolve(openTaskCompletionSource);
+            //    openTaskCompletionSource = null;
+            //}
 
-            return taskCompletion.Task;
+            //if (result.CompletedSynchronously)
+            //{
+            //    StreamCopyCallback(result);
+            //}
+
+            //cancellationToken.Register(() => taskCompletion.TrySetCanceled());
+
+            //return taskCompletion.Task;
         }
 
         private void StreamCopyCallback(IAsyncResult result)
@@ -258,5 +301,155 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
             }
         }
 
+        public class UdpClientStream : Stream
+        {
+            private static int RtpHeaderBytes = 12;
+            private static int PacketSize = 1316;
+            private readonly ISocket _udpClient;
+            bool disposed;
+
+            public UdpClientStream(ISocket udpClient) : base()
+            {
+                _udpClient = udpClient;
+            }
+
+            public override async Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
+            {
+                if (buffer == null)
+                    throw new ArgumentNullException("buffer");
+
+                if (offset + count < 0)
+                    throw new ArgumentOutOfRangeException("offset + count must not be negative", "offset+count");
+
+                if (offset + count > buffer.Length)
+                    throw new ArgumentException("offset + count must not be greater than the length of buffer", "offset+count");
+
+                if (disposed)
+                    throw new ObjectDisposedException(typeof(UdpClientStream).ToString());
+
+                // This will always receive a 1328 packet size (PacketSize + RtpHeaderSize)
+                // The RTP header will be stripped so see how many reads we need to make to fill the buffer.
+                int numReads = count / PacketSize;
+                int totalBytesRead = 0;
+                byte[] receiveBuffer = new byte[81920];
+
+                for (int i = 0; i < numReads; ++i)
+                {
+                    var data = await _udpClient.ReceiveAsync(receiveBuffer, 0, receiveBuffer.Length, cancellationToken).ConfigureAwait(false);
+
+                    var bytesRead = data.ReceivedBytes - RtpHeaderBytes;
+
+                    // remove rtp header
+                    Buffer.BlockCopy(data.Buffer, RtpHeaderBytes, buffer, offset, bytesRead);
+                    offset += bytesRead;
+                    totalBytesRead += bytesRead;
+                }
+                return totalBytesRead;
+            }
+
+            public override int Read(byte[] buffer, int offset, int count)
+            {
+                if (buffer == null)
+                    throw new ArgumentNullException("buffer");
+
+                if (offset + count < 0)
+                    throw new ArgumentOutOfRangeException("offset + count must not be negative", "offset+count");
+
+                if (offset + count > buffer.Length)
+                    throw new ArgumentException("offset + count must not be greater than the length of buffer", "offset+count");
+
+                if (disposed)
+                    throw new ObjectDisposedException(typeof(UdpClientStream).ToString());
+
+                // This will always receive a 1328 packet size (PacketSize + RtpHeaderSize)
+                // The RTP header will be stripped so see how many reads we need to make to fill the buffer.
+                int numReads = count / PacketSize;
+                int totalBytesRead = 0;
+                byte[] receiveBuffer = new byte[81920];
+
+                for (int i = 0; i < numReads; ++i)
+                {
+                    var receivedBytes = _udpClient.Receive(receiveBuffer, 0, receiveBuffer.Length);
+
+                    var bytesRead = receivedBytes - RtpHeaderBytes;
+
+                    // remove rtp header
+                    Buffer.BlockCopy(receiveBuffer, RtpHeaderBytes, buffer, offset, bytesRead);
+                    offset += bytesRead;
+                    totalBytesRead += bytesRead;
+                }
+                return totalBytesRead;
+            }
+
+            protected override void Dispose(bool disposing)
+            {
+                disposed = true;
+            }
+
+            public override bool CanRead
+            {
+                get
+                {
+                    throw new NotImplementedException();
+                }
+            }
+
+            public override bool CanSeek
+            {
+                get
+                {
+                    throw new NotImplementedException();
+                }
+            }
+
+            public override bool CanWrite
+            {
+                get
+                {
+                    throw new NotImplementedException();
+                }
+            }
+
+            public override long Length
+            {
+                get
+                {
+                    throw new NotImplementedException();
+                }
+            }
+
+            public override long Position
+            {
+                get
+                {
+                    throw new NotImplementedException();
+                }
+
+                set
+                {
+                    throw new NotImplementedException();
+                }
+            }
+
+            public override void Flush()
+            {
+                throw new NotImplementedException();
+            }
+
+            public override long Seek(long offset, SeekOrigin origin)
+            {
+                throw new NotImplementedException();
+            }
+
+            public override void SetLength(long value)
+            {
+                throw new NotImplementedException();
+            }
+
+            public override void Write(byte[] buffer, int offset, int count)
+            {
+                throw new NotImplementedException();
+            }
+        }
     }
 }

Emby.Server.Implementations/LiveTv/TunerHosts/MulticastStream.cs

@@ -13,7 +13,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
 {
     public class MulticastStream
     {
-        private readonly ConcurrentDictionary<Guid,QueueStream> _outputStreams = new ConcurrentDictionary<Guid, QueueStream>();
+        private readonly ConcurrentDictionary<Guid, QueueStream> _outputStreams = new ConcurrentDictionary<Guid, QueueStream>();
         private const int BufferSize = 81920;
         private readonly ILogger _logger;
 
@@ -31,9 +31,11 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
                 throw new ArgumentNullException("source");
             }
 
-            while (!cancellationToken.IsCancellationRequested)
+            while (true)
             {
-                var bytesRead = await source.ReadAsync(buffer, 0, buffer.Length, cancellationToken).ConfigureAwait(false);
+                cancellationToken.ThrowIfCancellationRequested();
+
+                var bytesRead = source.Read(buffer, 0, buffer.Length);
 
                 if (bytesRead > 0)
                 {
@@ -41,7 +43,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
 
                     //if (allStreams.Count == 1)
                     //{
-                    //    await allStreams[0].Value.WriteAsync(buffer, 0, bytesRead).ConfigureAwait(false);
+                    //    allStreams[0].Value.Write(buffer, 0, bytesRead);
                     //}
                     //else
                     {

Emby.Server.Implementations/LiveTv/TunerHosts/QueueStream.cs

@@ -14,7 +14,6 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
     {
         private readonly Stream _outputStream;
         private readonly ConcurrentQueue<Tuple<byte[], int, int>> _queue = new ConcurrentQueue<Tuple<byte[], int, int>>();
-        private CancellationToken _cancellationToken;
         public TaskCompletionSource<bool> TaskCompletion { get; private set; }
 
         public Action<QueueStream> OnFinished { get; set; }
@@ -35,8 +34,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
 
         public void Start(CancellationToken cancellationToken)
         {
-            _cancellationToken = cancellationToken;
-            Task.Run(() => StartInternal());
+            Task.Run(() => StartInternal(cancellationToken));
         }
 
         private Tuple<byte[], int, int> Dequeue()
@@ -59,14 +57,13 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
             }
         }
 
-        public async Task WriteAsync(byte[] bytes, int offset, int count)
+        public void Write(byte[] bytes, int offset, int count)
         {
             //return _outputStream.WriteAsync(bytes, offset, count, cancellationToken);
-            var cancellationToken = _cancellationToken;
 
             try
             {
-                await _outputStream.WriteAsync(bytes, offset, count, cancellationToken).ConfigureAwait(false);
+                _outputStream.Write(bytes, offset, count);
             }
             catch (OperationCanceledException)
             {
@@ -82,18 +79,18 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
             }
         }
 
-        private async Task StartInternal()
+        private async Task StartInternal(CancellationToken cancellationToken)
         {
-            var cancellationToken = _cancellationToken;
-
             try
             {
                 while (true)
                 {
+                    cancellationToken.ThrowIfCancellationRequested();
+
                     var result = Dequeue();
                     if (result != null)
                     {
-                        await _outputStream.WriteAsync(result.Item1, result.Item2, result.Item3, cancellationToken).ConfigureAwait(false);
+                        _outputStream.Write(result.Item1, result.Item2, result.Item3);
                     }
                     else
                     {

MediaBrowser.Api/Playback/Hls/BaseHlsService.cs

@@ -202,7 +202,7 @@ namespace MediaBrowser.Api.Playback.Hls
 
                             while (!reader.EndOfStream)
                             {
-                                var line = await reader.ReadLineAsync().ConfigureAwait(false);
+                                var line =  reader.ReadLine();
 
                                 if (line.IndexOf("#EXTINF:", StringComparison.OrdinalIgnoreCase) != -1)
                                 {
@@ -234,11 +234,11 @@ namespace MediaBrowser.Api.Playback.Hls
 
             try
             {
-                return FileSystem.GetFileStream(tmpPath, FileOpenMode.Open, FileAccessMode.Read, FileShareMode.ReadWrite, FileOpenOptions.Asynchronous | FileOpenOptions.SequentialScan);
+                return FileSystem.GetFileStream(tmpPath, FileOpenMode.Open, FileAccessMode.Read, FileShareMode.ReadWrite, FileOpenOptions.SequentialScan);
             }
             catch (IOException)
             {
-                return FileSystem.GetFileStream(path, FileOpenMode.Open, FileAccessMode.Read, FileShareMode.ReadWrite, FileOpenOptions.Asynchronous | FileOpenOptions.SequentialScan);
+                return FileSystem.GetFileStream(path, FileOpenMode.Open, FileAccessMode.Read, FileShareMode.ReadWrite, FileOpenOptions.SequentialScan);
             }
         }
 

MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs

@@ -423,7 +423,7 @@ namespace MediaBrowser.Api.Playback.Hls
             return Path.Combine(folder, filename + index.ToString(UsCulture) + GetSegmentFileExtension(state.Request));
         }
 
-        private async Task<object> GetSegmentResult(StreamState state, 
+        private async Task<object> GetSegmentResult(StreamState state,
             string playlistPath,
             string segmentPath,
             string segmentExtension,
@@ -456,26 +456,20 @@ namespace MediaBrowser.Api.Playback.Hls
             {
                 try
                 {
-                    using (var fileStream = GetPlaylistFileStream(playlistPath))
+                    var text = FileSystem.ReadAllText(playlistPath, Encoding.UTF8);
+
+                    // If it appears in the playlist, it's done
+                    if (text.IndexOf(segmentFilename, StringComparison.OrdinalIgnoreCase) != -1)
                     {
-                        using (var reader = new StreamReader(fileStream, Encoding.UTF8, true, BufferSize))
+                        if (!segmentFileExists)
                         {
-                            var text = await reader.ReadToEndAsync().ConfigureAwait(false);
-
-                            // If it appears in the playlist, it's done
-                            if (text.IndexOf(segmentFilename, StringComparison.OrdinalIgnoreCase) != -1)
-                            {
-                                if (!segmentFileExists)
-                                {
-                                    segmentFileExists = FileSystem.FileExists(segmentPath);
-                                }
-                                if (segmentFileExists)
-                                {
-                                    return await GetSegmentResult(state, segmentPath, segmentIndex, transcodingJob).ConfigureAwait(false);
-                                }
-                                //break;
-                            }
+                            segmentFileExists = FileSystem.FileExists(segmentPath);
+                        }
+                        if (segmentFileExists)
+                        {
+                            return await GetSegmentResult(state, segmentPath, segmentIndex, transcodingJob).ConfigureAwait(false);
                         }
+                        //break;
                     }
                 }
                 catch (IOException)

MediaBrowser.Api/Playback/Progressive/ProgressiveStreamWriter.cs

@@ -63,9 +63,7 @@ namespace MediaBrowser.Api.Playback.Progressive
 
         private Stream GetInputStream(bool allowAsyncFileRead)
         {
-            var fileOpenOptions = StartPosition > 0
-                ? FileOpenOptions.RandomAccess
-                : FileOpenOptions.SequentialScan;
+            var fileOpenOptions = FileOpenOptions.SequentialScan;
 
             if (allowAsyncFileRead)
             {

MediaBrowser.Controller/IO/StreamHelper.cs

@@ -0,0 +1,32 @@
+using System.IO;
+using System.Threading;
+using System;
+
+namespace MediaBrowser.Controller.IO
+{
+    public static class StreamHelper
+    {
+        public static void CopyTo(Stream source, Stream destination, int bufferSize, CancellationToken cancellationToken)
+        {
+            CopyTo(source, destination, bufferSize, null, cancellationToken);
+        }
+
+        public static void CopyTo(Stream source, Stream destination, int bufferSize, Action onStarted, CancellationToken cancellationToken)
+        {
+            byte[] buffer = new byte[bufferSize];
+            int read;
+            while ((read = source.Read(buffer, 0, buffer.Length)) != 0)
+            {
+                cancellationToken.ThrowIfCancellationRequested();
+
+                destination.Write(buffer, 0, read);
+
+                if (onStarted != null)
+                {
+                    onStarted();
+                    onStarted = null;
+                }
+            }
+        }
+    }
+}

MediaBrowser.Controller/LiveTv/LiveStream.cs

@@ -53,9 +53,7 @@ namespace MediaBrowser.Controller.LiveTv
 
         protected Stream GetInputStream(string path, long startPosition, bool allowAsyncFileRead)
         {
-            var fileOpenOptions = startPosition > 0
-                ? FileOpenOptions.RandomAccess
-                : FileOpenOptions.SequentialScan;
+            var fileOpenOptions = FileOpenOptions.SequentialScan;
 
             if (allowAsyncFileRead)
             {

MediaBrowser.Controller/MediaBrowser.Controller.csproj

@@ -134,6 +134,7 @@
     <Compile Include="Entities\UserViewBuilder.cs" />
     <Compile Include="Extensions\StringExtensions.cs" />
     <Compile Include="FileOrganization\IFileOrganizationService.cs" />
+    <Compile Include="IO\StreamHelper.cs" />
     <Compile Include="Library\DeleteOptions.cs" />
     <Compile Include="Library\ILibraryPostScanTask.cs" />
     <Compile Include="Library\IMediaSourceManager.cs" />

MediaBrowser.Model/Net/ISocket.cs

@@ -16,6 +16,8 @@ namespace MediaBrowser.Model.Net
 
         Task<SocketReceiveResult> ReceiveAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken);
 
+        int Receive(byte[] buffer, int offset, int count);
+
         IAsyncResult BeginReceive(byte[] buffer, int offset, int count, AsyncCallback callback);
         SocketReceiveResult EndReceive(IAsyncResult result);
 

SocketHttpListener/Net/HttpResponseStream.Managed.cs

@@ -357,9 +357,7 @@ namespace SocketHttpListener.Net
             //    allowAsync = true;
             //}
 
-            var fileOpenOptions = offset > 0
-                ? FileOpenOptions.RandomAccess
-                : FileOpenOptions.SequentialScan;
+            var fileOpenOptions = FileOpenOptions.SequentialScan;
 
             if (allowAsync)
             {