jellyfin/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunUdpStream.cs
2019-01-28 22:09:56 +01:00

313 lines
12 KiB
C#

using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Library;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.LiveTv;
using MediaBrowser.Model.MediaInfo;
using Microsoft.Extensions.Logging;
namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
{
public class HdHomerunUdpStream : LiveStream, IDirectStreamProvider
{
private readonly IServerApplicationHost _appHost;
private readonly MediaBrowser.Model.Net.ISocketFactory _socketFactory;
private readonly IHdHomerunChannelCommands _channelCommands;
private readonly int _numTuners;
private readonly INetworkManager _networkManager;
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)
: base(mediaSource, tunerHostInfo, fileSystem, logger, appPaths)
{
_appHost = appHost;
_socketFactory = socketFactory;
_networkManager = networkManager;
OriginalStreamId = originalStreamId;
_channelCommands = channelCommands;
_numTuners = numTuners;
EnableStreamSharing = true;
}
private static Socket CreateSocket(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType)
{
var socket = new Socket(addressFamily, SocketType.Stream, ProtocolType.Tcp);
return socket;
}
public override async Task Open(CancellationToken openCancellationToken)
{
LiveStreamCancellationTokenSource.Token.ThrowIfCancellationRequested();
var mediaSource = OriginalMediaSource;
var uri = new Uri(mediaSource.Path);
var localPort = _networkManager.GetRandomUnusedUdpPort();
Directory.CreateDirectory(Path.GetDirectoryName(TempFilePath));
Logger.LogInformation("Opening HDHR UDP Live stream from {host}", uri.Host);
var remoteAddress = IPAddress.Parse(uri.Host);
var embyRemoteAddress = _networkManager.ParseIpAddress(uri.Host);
IPAddress localAddress = null;
using (var tcpSocket = CreateSocket(remoteAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp))
{
try
{
tcpSocket.Connect(new IPEndPoint(remoteAddress, HdHomerunManager.HdHomeRunPort));
localAddress = ((IPEndPoint)tcpSocket.LocalEndPoint).Address;
tcpSocket.Close();
}
catch (Exception ex)
{
Logger.LogError(ex, "Unable to determine local ip address for Legacy HDHomerun stream.");
return;
}
}
var udpClient = _socketFactory.CreateUdpSocket(localPort);
var hdHomerunManager = new HdHomerunManager(_socketFactory, Logger);
try
{
// send url to start streaming
await hdHomerunManager.StartStreaming(embyRemoteAddress, localAddress, localPort, _channelCommands, _numTuners, openCancellationToken).ConfigureAwait(false);
}
catch (Exception ex)
{
using (udpClient)
using (hdHomerunManager)
{
if (!(ex is OperationCanceledException))
{
Logger.LogError(ex, "Error opening live stream:");
}
throw;
}
}
var taskCompletionSource = new TaskCompletionSource<bool>();
await StartStreaming(udpClient, hdHomerunManager, remoteAddress, taskCompletionSource, LiveStreamCancellationTokenSource.Token);
//OpenedMediaSource.Protocol = MediaProtocol.File;
//OpenedMediaSource.Path = tempFile;
//OpenedMediaSource.ReadAtNativeFramerate = true;
MediaSource.Path = _appHost.GetLocalApiUrl("127.0.0.1") + "/LiveTv/LiveStreamFiles/" + UniqueId + "/stream.ts";
MediaSource.Protocol = MediaProtocol.Http;
//OpenedMediaSource.SupportsDirectPlay = false;
//OpenedMediaSource.SupportsDirectStream = true;
//OpenedMediaSource.SupportsTranscoding = true;
//await Task.Delay(5000).ConfigureAwait(false);
await taskCompletionSource.Task.ConfigureAwait(false);
}
private Task StartStreaming(MediaBrowser.Model.Net.ISocket udpClient, HdHomerunManager hdHomerunManager, IPAddress remoteAddress, TaskCompletionSource<bool> openTaskCompletionSource, CancellationToken cancellationToken)
{
return Task.Run(async () =>
{
using (udpClient)
using (hdHomerunManager)
{
try
{
await CopyTo(udpClient, TempFilePath, openTaskCompletionSource, cancellationToken).ConfigureAwait(false);
}
catch (OperationCanceledException ex)
{
Logger.LogInformation("HDHR UDP stream cancelled or timed out from {0}", remoteAddress);
openTaskCompletionSource.TrySetException(ex);
}
catch (Exception ex)
{
Logger.LogError(ex, "Error opening live stream:");
openTaskCompletionSource.TrySetException(ex);
}
EnableStreamSharing = false;
}
await DeleteTempFiles(new List<string> { TempFilePath }).ConfigureAwait(false);
});
}
private static void Resolve(TaskCompletionSource<bool> openTaskCompletionSource)
{
Task.Run(() =>
{
openTaskCompletionSource.TrySetResult(true);
});
}
private static int RtpHeaderBytes = 12;
private async Task CopyTo(MediaBrowser.Model.Net.ISocket udpClient, string file, TaskCompletionSource<bool> openTaskCompletionSource, CancellationToken cancellationToken)
{
var bufferSize = 81920;
byte[] buffer = new byte[bufferSize];
int read;
var resolved = false;
using (var source = _socketFactory.CreateNetworkStream(udpClient, false))
using (var fileStream = FileSystem.GetFileStream(file, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read, FileOpenOptions.None))
{
var currentCancellationToken = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, new CancellationTokenSource(TimeSpan.FromSeconds(30)).Token).Token;
while ((read = await source.ReadAsync(buffer, 0, buffer.Length, currentCancellationToken).ConfigureAwait(false)) != 0)
{
cancellationToken.ThrowIfCancellationRequested();
currentCancellationToken = cancellationToken;
read -= RtpHeaderBytes;
if (read > 0)
{
fileStream.Write(buffer, RtpHeaderBytes, read);
}
if (!resolved)
{
resolved = true;
DateOpened = DateTime.UtcNow;
Resolve(openTaskCompletionSource);
}
}
}
}
public class UdpClientStream : Stream
{
private static int RtpHeaderBytes = 12;
private static int PacketSize = 1316;
private readonly MediaBrowser.Model.Net.ISocket _udpClient;
bool disposed;
public UdpClientStream(MediaBrowser.Model.Net.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(nameof(buffer));
if (offset + count < 0)
throw new ArgumentOutOfRangeException(nameof(offset), "offset + count must not be negative");
if (offset + count > buffer.Length)
throw new ArgumentException("offset + count must not be greater than the length of buffer");
if (disposed)
throw new ObjectDisposedException(nameof(UdpClientStream));
// 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(nameof(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");
if (disposed)
throw new ObjectDisposedException(nameof(UdpClientStream));
// 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 => throw new NotImplementedException();
public override bool CanSeek => throw new NotImplementedException();
public override bool CanWrite => throw new NotImplementedException();
public override long Length => 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();
}
}
}
}