jellyfin-server/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunUdpStream.cs
2017-05-25 09:00:14 -04:00

262 lines
11 KiB
C#

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;
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<bool> _liveStreamTaskCompletionSource = new TaskCompletionSource<bool>();
private readonly IHdHomerunChannelCommands _channelCommands;
private readonly int _numTuners;
private readonly INetworkManager _networkManager;
private readonly string _tempFilePath;
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");
}
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<bool>();
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<bool> 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)
{
FileSystem.CreateDirectory(FileSystem.GetDirectoryName(_tempFilePath));
using (var fileStream = FileSystem.GetFileStream(_tempFilePath, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read, FileOpenOptions.Asynchronous))
{
await CopyTo(udpClient, fileStream, 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<bool> openTaskCompletionSource)
{
Task.Run(() =>
{
openTaskCompletionSource.TrySetResult(true);
});
}
public Task CopyToAsync(Stream stream, CancellationToken cancellationToken)
{
return CopyFileTo(_tempFilePath, false, stream, cancellationToken);
}
protected async Task CopyFileTo(string path, bool allowEndOfFile, Stream outputStream, CancellationToken cancellationToken)
{
var eofCount = 0;
long startPosition = -25000;
if (startPosition < 0)
{
var length = FileSystem.GetFileInfo(path).Length;
startPosition = Math.Max(length - startPosition, 0);
}
using (var inputStream = GetInputStream(path, startPosition, true))
{
if (startPosition > 0)
{
inputStream.Position = startPosition;
}
while (eofCount < 20 || !allowEndOfFile)
{
var bytesRead = await AsyncStreamCopier.CopyStream(inputStream, outputStream, 81920, 4, cancellationToken).ConfigureAwait(false);
//var position = fs.Position;
//_logger.Debug("Streamed {0} bytes to position {1} from file {2}", bytesRead, position, path);
if (bytesRead == 0)
{
eofCount++;
await Task.Delay(100, cancellationToken).ConfigureAwait(false);
}
else
{
eofCount = 0;
}
}
}
}
private static int RtpHeaderBytes = 12;
private Task CopyTo(ISocket udpClient, Stream outputStream, TaskCompletionSource<bool> openTaskCompletionSource, CancellationToken cancellationToken)
{
return CopyStream(_socketFactory.CreateNetworkStream(udpClient, false), outputStream, 81920, 4, openTaskCompletionSource, cancellationToken);
}
private Task CopyStream(Stream source, Stream target, int bufferSize, int bufferCount, TaskCompletionSource<bool> openTaskCompletionSource, CancellationToken cancellationToken)
{
var copier = new AsyncStreamCopier(source, target, 0, cancellationToken, false, bufferSize, bufferCount);
copier.IndividualReadOffset = RtpHeaderBytes;
var taskCompletion = new TaskCompletionSource<long>();
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);
}
}
}
}