using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; using Emby.Server.Implementations.IO; using MediaBrowser.Common.Net; using MediaBrowser.Controller; using MediaBrowser.Controller.Library; using MediaBrowser.Controller.LiveTv; using MediaBrowser.Model.Dto; using MediaBrowser.Model.IO; 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 { public class HdHomerunUdpStream : LiveStream, IDirectStreamProvider { private readonly ILogger _logger; private readonly IServerApplicationHost _appHost; private readonly ISocketFactory _socketFactory; private readonly CancellationTokenSource _liveStreamCancellationTokenSource = new CancellationTokenSource(); private readonly TaskCompletionSource _liveStreamTaskCompletionSource = new TaskCompletionSource(); private readonly IHdHomerunChannelCommands _channelCommands; private readonly int _numTuners; 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) { _logger = logger; _appHost = appHost; _socketFactory = socketFactory; _networkManager = networkManager; OriginalStreamId = originalStreamId; _channelCommands = channelCommands; _numTuners = numTuners; _tempFilePath = Path.Combine(appPaths.TranscodingTempPath, UniqueId + ".ts"); _multicastStream = new MulticastStream(_logger); } protected override async Task OpenInternal(CancellationToken openCancellationToken) { _liveStreamCancellationTokenSource.Token.ThrowIfCancellationRequested(); var mediaSource = OriginalMediaSource; var uri = new Uri(mediaSource.Path); var localPort = _networkManager.GetRandomUnusedUdpPort(); _logger.Info("Opening HDHR UDP Live stream from {0}", uri.Host); var taskCompletionSource = new TaskCompletionSource(); StartStreaming(uri.Host, localPort, taskCompletionSource, _liveStreamCancellationTokenSource.Token); //OpenedMediaSource.Protocol = MediaProtocol.File; //OpenedMediaSource.Path = tempFile; //OpenedMediaSource.ReadAtNativeFramerate = true; OpenedMediaSource.Path = _appHost.GetLocalApiUrl("127.0.0.1") + "/LiveTv/LiveStreamFiles/" + UniqueId + "/stream.ts"; OpenedMediaSource.Protocol = MediaProtocol.Http; //OpenedMediaSource.SupportsDirectPlay = false; //OpenedMediaSource.SupportsDirectStream = true; //OpenedMediaSource.SupportsTranscoding = true; await taskCompletionSource.Task.ConfigureAwait(false); //await Task.Delay(5000).ConfigureAwait(false); } public override Task Close() { _logger.Info("Closing HDHR UDP live stream"); _liveStreamCancellationTokenSource.Cancel(); return _liveStreamTaskCompletionSource.Task; } private Task StartStreaming(string remoteIp, int localPort, TaskCompletionSource openTaskCompletionSource, CancellationToken cancellationToken) { return Task.Run(async () => { var isFirstAttempt = true; using (var udpClient = _socketFactory.CreateUdpSocket(localPort)) { using (var hdHomerunManager = new HdHomerunManager(_socketFactory)) { var remoteAddress = _networkManager.ParseIpAddress(remoteIp); IpAddressInfo localAddress = null; using (var tcpSocket = _socketFactory.CreateSocket(remoteAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp, false)) { try { tcpSocket.Connect(new IpEndPointInfo(remoteAddress, HdHomerunManager.HdHomeRunPort)); localAddress = tcpSocket.LocalEndPoint.IpAddress; tcpSocket.Close(); } catch (Exception) { _logger.Error("Unable to determine local ip address for Legacy HDHomerun stream."); return; } } while (!cancellationToken.IsCancellationRequested) { try { // send url to start streaming await hdHomerunManager.StartStreaming(remoteAddress, localAddress, localPort, _channelCommands, _numTuners, cancellationToken).ConfigureAwait(false); _logger.Info("Opened HDHR UDP stream from {0}", remoteAddress); if (!cancellationToken.IsCancellationRequested) { if (_enableFileBuffer) { 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); } } } catch (OperationCanceledException ex) { _logger.Info("HDHR UDP stream cancelled or timed out from {0}", remoteAddress); openTaskCompletionSource.TrySetException(ex); break; } catch (Exception ex) { if (isFirstAttempt) { _logger.ErrorException("Error opening live stream:", ex); openTaskCompletionSource.TrySetException(ex); break; } _logger.ErrorException("Error copying live stream, will reopen", ex); } isFirstAttempt = false; } await hdHomerunManager.StopStreaming().ConfigureAwait(false); _liveStreamTaskCompletionSource.TrySetResult(true); } } await DeleteTempFile(_tempFilePath).ConfigureAwait(false); }); } private void Resolve(TaskCompletionSource openTaskCompletionSource) { Task.Run(() => { openTaskCompletionSource.TrySetResult(true); }); } public async Task CopyToAsync(Stream outputStream, CancellationToken cancellationToken) { if (!_enableFileBuffer) { await _multicastStream.CopyToAsync(outputStream, cancellationToken).ConfigureAwait(false); return; } var path = _tempFilePath; long startPosition = -20000; if (startPosition < 0) { var length = FileSystem.GetFileInfo(path).Length; startPosition = Math.Max(length - startPosition, 0); } _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 (!cancellationToken.IsCancellationRequested) { 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) { await Task.Delay(100, cancellationToken).ConfigureAwait(false); } } } } private static int RtpHeaderBytes = 12; private void CopyTo(ISocket udpClient, Stream target, TaskCompletionSource openTaskCompletionSource, CancellationToken cancellationToken) { var source = _socketFactory.CreateNetworkStream(udpClient, false); var bufferSize = 81920; byte[] buffer = new byte[bufferSize]; int read; var resolved = false; while ((read = source.Read(buffer, 0, buffer.Length)) != 0) { cancellationToken.ThrowIfCancellationRequested(); read -= RtpHeaderBytes; if (read > 0) { target.Write(buffer, RtpHeaderBytes, read); } if (!resolved) { resolved = true; Resolve(openTaskCompletionSource); } } //var copier = new AsyncStreamCopier(source, target, 0, cancellationToken, false, bufferSize, bufferCount); //copier.IndividualReadOffset = RtpHeaderBytes; //var taskCompletion = new TaskCompletionSource(); //copier.TaskCompletionSource = taskCompletion; //var result = copier.BeginCopy(StreamCopyCallback, copier); //if (openTaskCompletionSource != null) //{ // Resolve(openTaskCompletionSource); // openTaskCompletionSource = null; //} //if (result.CompletedSynchronously) //{ // StreamCopyCallback(result); //} //cancellationToken.Register(() => taskCompletion.TrySetCanceled()); //return taskCompletion.Task; } private void StreamCopyCallback(IAsyncResult result) { var copier = (AsyncStreamCopier)result.AsyncState; var taskCompletion = copier.TaskCompletionSource; try { copier.EndCopy(result); taskCompletion.TrySetResult(0); } catch (Exception ex) { taskCompletion.TrySetException(ex); } } 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 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(); } } } }