344 lines
13 KiB
C#
344 lines
13 KiB
C#
using System;
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using System.IO;
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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.Model.Dto;
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using MediaBrowser.Model.IO;
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using Microsoft.Extensions.Logging;
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using MediaBrowser.Model.MediaInfo;
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using MediaBrowser.Model.System;
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using MediaBrowser.Model.LiveTv;
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using System.Collections.Generic;
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using System.Net.Sockets;
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using System.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 IServerApplicationHost _appHost;
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private readonly MediaBrowser.Model.Net.ISocketFactory _socketFactory;
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private readonly IHdHomerunChannelCommands _channelCommands;
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private readonly int _numTuners;
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private readonly INetworkManager _networkManager;
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public HdHomerunUdpStream(MediaSourceInfo mediaSource, TunerHostInfo tunerHostInfo, string originalStreamId, IHdHomerunChannelCommands channelCommands, int numTuners, IFileSystem fileSystem, IHttpClient httpClient, ILogger logger, IServerApplicationPaths appPaths, IServerApplicationHost appHost, MediaBrowser.Model.Net.ISocketFactory socketFactory, INetworkManager networkManager)
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: base(mediaSource, tunerHostInfo, fileSystem, logger, appPaths)
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{
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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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_channelCommands = channelCommands;
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_numTuners = numTuners;
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EnableStreamSharing = true;
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}
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private Socket CreateSocket(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType)
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{
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var socket = new Socket(addressFamily, SocketType.Stream, ProtocolType.Tcp);
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return socket;
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}
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public override async Task Open(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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FileSystem.CreateDirectory(FileSystem.GetDirectoryName(TempFilePath));
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Logger.LogInformation("Opening HDHR UDP Live stream from {host}", uri.Host);
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var remoteAddress = IPAddress.Parse(uri.Host);
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var embyRemoteAddress = _networkManager.ParseIpAddress(uri.Host);
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IPAddress localAddress = null;
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using (var tcpSocket = CreateSocket(remoteAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp))
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{
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try
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{
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tcpSocket.Connect(new IPEndPoint(remoteAddress, HdHomerunManager.HdHomeRunPort));
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localAddress = ((IPEndPoint)tcpSocket.LocalEndPoint).Address;
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tcpSocket.Close();
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "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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var udpClient = _socketFactory.CreateUdpSocket(localPort);
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var hdHomerunManager = new HdHomerunManager(_socketFactory, Logger);
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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(embyRemoteAddress, localAddress, localPort, _channelCommands, _numTuners, openCancellationToken).ConfigureAwait(false);
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}
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catch (Exception ex)
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{
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using (udpClient)
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using (hdHomerunManager)
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{
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if (!(ex is OperationCanceledException))
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{
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Logger.LogError(ex, "Error opening live stream:");
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}
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throw;
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}
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}
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var taskCompletionSource = new TaskCompletionSource<bool>();
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await StartStreaming(udpClient, hdHomerunManager, remoteAddress, 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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MediaSource.Path = _appHost.GetLocalApiUrl("127.0.0.1") + "/LiveTv/LiveStreamFiles/" + UniqueId + "/stream.ts";
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MediaSource.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 Task.Delay(5000).ConfigureAwait(false);
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await taskCompletionSource.Task.ConfigureAwait(false);
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}
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private Task StartStreaming(MediaBrowser.Model.Net.ISocket udpClient, HdHomerunManager hdHomerunManager, IPAddress remoteAddress, TaskCompletionSource<bool> openTaskCompletionSource, CancellationToken cancellationToken)
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{
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return Task.Run(async () =>
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{
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using (udpClient)
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using (hdHomerunManager)
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{
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try
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{
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await CopyTo(udpClient, TempFilePath, openTaskCompletionSource, cancellationToken).ConfigureAwait(false);
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}
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catch (OperationCanceledException ex)
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{
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Logger.LogInformation("HDHR UDP stream cancelled or timed out from {0}", remoteAddress);
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openTaskCompletionSource.TrySetException(ex);
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "Error opening live stream:");
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openTaskCompletionSource.TrySetException(ex);
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}
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EnableStreamSharing = false;
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}
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await DeleteTempFiles(new List<string> { TempFilePath }).ConfigureAwait(false);
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});
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}
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private void Resolve(TaskCompletionSource<bool> openTaskCompletionSource)
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{
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Task.Run(() =>
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{
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openTaskCompletionSource.TrySetResult(true);
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});
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}
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private static int RtpHeaderBytes = 12;
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private async Task CopyTo(MediaBrowser.Model.Net.ISocket udpClient, string file, TaskCompletionSource<bool> openTaskCompletionSource, CancellationToken cancellationToken)
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{
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var bufferSize = 81920;
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byte[] buffer = new byte[bufferSize];
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int read;
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var resolved = false;
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using (var source = _socketFactory.CreateNetworkStream(udpClient, false))
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using (var fileStream = FileSystem.GetFileStream(file, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read, FileOpenOptions.None))
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{
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var currentCancellationToken = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, new CancellationTokenSource(TimeSpan.FromSeconds(30)).Token).Token;
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while ((read = await source.ReadAsync(buffer, 0, buffer.Length, currentCancellationToken).ConfigureAwait(false)) != 0)
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{
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cancellationToken.ThrowIfCancellationRequested();
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currentCancellationToken = cancellationToken;
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read -= RtpHeaderBytes;
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if (read > 0)
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{
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fileStream.Write(buffer, RtpHeaderBytes, read);
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}
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if (!resolved)
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{
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resolved = true;
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DateOpened = DateTime.UtcNow;
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Resolve(openTaskCompletionSource);
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}
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}
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}
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}
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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 MediaBrowser.Model.Net.ISocket _udpClient;
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bool disposed;
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public UdpClientStream(MediaBrowser.Model.Net.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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byte[] receiveBuffer = new byte[81920];
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for (int i = 0; i < numReads; ++i)
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{
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var data = await _udpClient.ReceiveAsync(receiveBuffer, 0, receiveBuffer.Length, 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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public override int Read(byte[] buffer, int offset, int count)
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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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byte[] receiveBuffer = new byte[81920];
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for (int i = 0; i < numReads; ++i)
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{
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var receivedBytes = _udpClient.Receive(receiveBuffer, 0, receiveBuffer.Length);
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var bytesRead = receivedBytes - RtpHeaderBytes;
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// remove rtp header
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Buffer.BlockCopy(receiveBuffer, 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 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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}
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