jellyfin/Emby.Server.Implementations/LiveTv/TunerHosts/MulticastStream.cs
2017-08-19 18:37:15 -04:00

82 lines
2.3 KiB
C#

using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Net;
namespace Emby.Server.Implementations.LiveTv.TunerHosts
{
public class MulticastStream
{
private readonly ConcurrentDictionary<Guid, QueueStream> _outputStreams = new ConcurrentDictionary<Guid, QueueStream>();
private const int BufferSize = 81920;
private readonly ILogger _logger;
public MulticastStream(ILogger logger)
{
_logger = logger;
}
public async Task CopyUntilCancelled(Stream source, Action onStarted, CancellationToken cancellationToken)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
while (true)
{
cancellationToken.ThrowIfCancellationRequested();
byte[] buffer = new byte[BufferSize];
var bytesRead = source.Read(buffer, 0, buffer.Length);
if (bytesRead > 0)
{
foreach (var stream in _outputStreams)
{
stream.Value.Queue(buffer, 0, bytesRead);
}
if (onStarted != null)
{
var onStartedCopy = onStarted;
onStarted = null;
Task.Run(onStartedCopy);
}
}
else
{
await Task.Delay(100).ConfigureAwait(false);
}
}
}
public Task CopyToAsync(Stream stream, CancellationToken cancellationToken)
{
var queueStream = new QueueStream(stream, _logger);
_outputStreams.TryAdd(queueStream.Id, queueStream);
try
{
queueStream.Start(cancellationToken);
}
finally
{
_outputStreams.TryRemove(queueStream.Id, out queueStream);
GC.Collect();
}
return Task.FromResult(true);
}
}
}