using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; 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; namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun { public class HdHomerunUdpStream : LiveStream, IDirectStreamProvider { private readonly ILogger _logger; private readonly IHttpClient _httpClient; private readonly IFileSystem _fileSystem; private readonly IServerApplicationPaths _appPaths; private readonly IServerApplicationHost _appHost; private readonly ISocketFactory _socketFactory; private readonly CancellationTokenSource _liveStreamCancellationTokenSource = new CancellationTokenSource(); private readonly TaskCompletionSource _liveStreamTaskCompletionSource = new TaskCompletionSource(); private readonly MulticastStream _multicastStream; private readonly IHdHomerunChannelCommands _channelCommands; private readonly int _numTuners; private readonly INetworkManager _networkManager; public HdHomerunUdpStream(MediaSourceInfo mediaSource, string originalStreamId, IHdHomerunChannelCommands channelCommands, int numTuners, IFileSystem fileSystem, IHttpClient httpClient, ILogger logger, IServerApplicationPaths appPaths, IServerApplicationHost appHost, ISocketFactory socketFactory, INetworkManager networkManager) : base(mediaSource) { _fileSystem = fileSystem; _httpClient = httpClient; _logger = logger; _appPaths = appPaths; _appHost = appHost; _socketFactory = socketFactory; _networkManager = networkManager; OriginalStreamId = originalStreamId; _multicastStream = new MulticastStream(_logger); _channelCommands = channelCommands; _numTuners = numTuners; } 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 async Task StartStreaming(string remoteIp, int localPort, TaskCompletionSource openTaskCompletionSource, CancellationToken cancellationToken) { await 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) { Action onStarted = null; if (isFirstAttempt) { onStarted = () => openTaskCompletionSource.TrySetResult(true); } await _multicastStream.CopyUntilCancelled(new UdpClientStream(udpClient), onStarted, 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); } } }).ConfigureAwait(false); } public Task CopyToAsync(Stream stream, CancellationToken cancellationToken) { return _multicastStream.CopyToAsync(stream, cancellationToken); } } // This handles the ReadAsync function only of a Stream object // This is used to wrap a UDP socket into a stream for MulticastStream which only uses ReadAsync 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; for (int i = 0; i < numReads; ++i) { var data = await _udpClient.ReceiveAsync(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; } 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 int Read(byte[] buffer, int offset, int count) { 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(); } } }