mirror of
https://github.com/jellyfin/jellyfin.git
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294 lines
11 KiB
C#
294 lines
11 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Controller;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.LiveTv;
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using MediaBrowser.Model.Dto;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.MediaInfo;
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using MediaBrowser.Model.Net;
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namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
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{
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public class HdHomerunUdpStream : LiveStream, IDirectStreamProvider
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{
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private readonly ILogger _logger;
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private readonly IHttpClient _httpClient;
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private readonly IFileSystem _fileSystem;
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private readonly IServerApplicationPaths _appPaths;
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private readonly IServerApplicationHost _appHost;
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private readonly ISocketFactory _socketFactory;
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private readonly CancellationTokenSource _liveStreamCancellationTokenSource = new CancellationTokenSource();
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private readonly TaskCompletionSource<bool> _liveStreamTaskCompletionSource = new TaskCompletionSource<bool>();
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private readonly MulticastStream _multicastStream;
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private readonly string _channelUrl;
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private readonly int _numTuners;
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private readonly INetworkManager _networkManager;
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public HdHomerunUdpStream(MediaSourceInfo mediaSource, string originalStreamId, string channelUrl, int numTuners, IFileSystem fileSystem, IHttpClient httpClient, ILogger logger, IServerApplicationPaths appPaths, IServerApplicationHost appHost, ISocketFactory socketFactory, INetworkManager networkManager)
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: base(mediaSource)
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{
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_fileSystem = fileSystem;
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_httpClient = httpClient;
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_logger = logger;
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_appPaths = appPaths;
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_appHost = appHost;
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_socketFactory = socketFactory;
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_networkManager = networkManager;
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OriginalStreamId = originalStreamId;
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_multicastStream = new MulticastStream(_logger);
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_channelUrl = channelUrl;
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_numTuners = numTuners;
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}
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protected override async Task OpenInternal(CancellationToken openCancellationToken)
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{
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_liveStreamCancellationTokenSource.Token.ThrowIfCancellationRequested();
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var mediaSource = OriginalMediaSource;
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var uri = new Uri(mediaSource.Path);
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var localPort = _networkManager.GetRandomUnusedUdpPort();
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_logger.Info("Opening HDHR UDP Live stream from {0}", uri.Host);
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var taskCompletionSource = new TaskCompletionSource<bool>();
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StartStreaming(uri.Host, localPort, taskCompletionSource, _liveStreamCancellationTokenSource.Token);
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//OpenedMediaSource.Protocol = MediaProtocol.File;
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//OpenedMediaSource.Path = tempFile;
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//OpenedMediaSource.ReadAtNativeFramerate = true;
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OpenedMediaSource.Path = _appHost.GetLocalApiUrl("127.0.0.1") + "/LiveTv/LiveStreamFiles/" + UniqueId + "/stream.ts";
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OpenedMediaSource.Protocol = MediaProtocol.Http;
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OpenedMediaSource.SupportsDirectPlay = false;
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OpenedMediaSource.SupportsDirectStream = true;
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OpenedMediaSource.SupportsTranscoding = true;
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await taskCompletionSource.Task.ConfigureAwait(false);
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//await Task.Delay(5000).ConfigureAwait(false);
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}
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public override Task Close()
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{
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_logger.Info("Closing HDHR UDP live stream");
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_liveStreamCancellationTokenSource.Cancel();
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return _liveStreamTaskCompletionSource.Task;
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}
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private async Task StartStreaming(string remoteIp, int localPort, TaskCompletionSource<bool> openTaskCompletionSource, CancellationToken cancellationToken)
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{
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await Task.Run(async () =>
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{
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var isFirstAttempt = true;
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using (var udpClient = _socketFactory.CreateUdpSocket(localPort))
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{
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using (var hdHomerunManager = new HdHomerunManager(_socketFactory))
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{
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var remoteAddress = new IpAddressInfo(remoteIp, IpAddressFamily.InterNetwork);
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IpAddressInfo localAddress = null;
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using (var tcpSocket = _socketFactory.CreateSocket(IpAddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp, false))
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{
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try
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{
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tcpSocket.Connect(new IpEndPointInfo(remoteAddress, HdHomerunManager.HdHomeRunPort));
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localAddress = tcpSocket.LocalEndPoint.IpAddress;
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tcpSocket.Close();
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}
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catch (Exception)
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{
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_logger.Error("Unable to determine local ip address for Legacy HDHomerun stream.");
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return;
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}
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}
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while (!cancellationToken.IsCancellationRequested)
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{
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try
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{
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// send url to start streaming
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await hdHomerunManager.StartStreaming(remoteAddress, localAddress, localPort, _channelUrl, _numTuners, cancellationToken).ConfigureAwait(false);
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var response = await udpClient.ReceiveAsync(cancellationToken).ConfigureAwait(false);
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_logger.Info("Opened HDHR UDP stream from {0}", _channelUrl);
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if (!cancellationToken.IsCancellationRequested)
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{
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Action onStarted = null;
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if (isFirstAttempt)
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{
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onStarted = () => openTaskCompletionSource.TrySetResult(true);
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}
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var stream = new UdpClientStream(udpClient);
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await _multicastStream.CopyUntilCancelled(stream, onStarted, cancellationToken).ConfigureAwait(false);
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}
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}
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catch (OperationCanceledException)
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{
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break;
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}
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catch (Exception ex)
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{
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if (isFirstAttempt)
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{
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_logger.ErrorException("Error opening live stream:", ex);
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openTaskCompletionSource.TrySetException(ex);
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break;
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}
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_logger.ErrorException("Error copying live stream, will reopen", ex);
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}
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isFirstAttempt = false;
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}
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await hdHomerunManager.StopStreaming().ConfigureAwait(false);
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udpClient.Dispose();
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_liveStreamTaskCompletionSource.TrySetResult(true);
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}
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}
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}).ConfigureAwait(false);
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}
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public Task CopyToAsync(Stream stream, CancellationToken cancellationToken)
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{
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return _multicastStream.CopyToAsync(stream);
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}
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}
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// This handles the ReadAsync function only of a Stream object
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// This is used to wrap a UDP socket into a stream for MulticastStream which only uses ReadAsync
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public class UdpClientStream : Stream
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{
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private static int RtpHeaderBytes = 12;
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private static int PacketSize = 1316;
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private readonly ISocket _udpClient;
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bool disposed;
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public UdpClientStream(ISocket udpClient) : base()
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{
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_udpClient = udpClient;
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}
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public override async Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
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{
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if (buffer == null)
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throw new ArgumentNullException("buffer");
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if (offset + count < 0)
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throw new ArgumentOutOfRangeException("offset + count must not be negative", "offset+count");
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if (offset + count > buffer.Length)
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throw new ArgumentException("offset + count must not be greater than the length of buffer", "offset+count");
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if (disposed)
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throw new ObjectDisposedException(typeof(UdpClientStream).ToString());
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// This will always receive a 1328 packet size (PacketSize + RtpHeaderSize)
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// The RTP header will be stripped so see how many reads we need to make to fill the buffer.
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int numReads = count / PacketSize;
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int totalBytesRead = 0;
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for (int i = 0; i < numReads; ++i)
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{
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var data = await _udpClient.ReceiveAsync(cancellationToken).ConfigureAwait(false);
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var bytesRead = data.ReceivedBytes - RtpHeaderBytes;
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// remove rtp header
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Buffer.BlockCopy(data.Buffer, RtpHeaderBytes, buffer, offset, bytesRead);
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offset += bytesRead;
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totalBytesRead += bytesRead;
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}
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return totalBytesRead;
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}
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protected override void Dispose(bool disposing)
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{
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disposed = true;
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}
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public override bool CanRead
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{
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get
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{
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throw new NotImplementedException();
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}
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}
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public override bool CanSeek
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{
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get
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{
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throw new NotImplementedException();
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}
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}
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public override bool CanWrite
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{
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get
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{
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throw new NotImplementedException();
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}
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}
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public override long Length
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{
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get
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{
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throw new NotImplementedException();
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}
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}
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public override long Position
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{
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get
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{
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throw new NotImplementedException();
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}
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set
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{
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throw new NotImplementedException();
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}
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}
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public override void Flush()
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{
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throw new NotImplementedException();
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}
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public override int Read(byte[] buffer, int offset, int count)
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{
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throw new NotImplementedException();
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}
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public override long Seek(long offset, SeekOrigin origin)
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{
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throw new NotImplementedException();
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}
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public override void SetLength(long value)
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{
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throw new NotImplementedException();
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}
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public override void Write(byte[] buffer, int offset, int count)
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{
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throw new NotImplementedException();
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}
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}
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}
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