jellyfin/MediaBrowser.Server.Implementations/LiveTv/TunerHosts/MulticastStream.cs
2016-10-07 11:08:13 -04:00

97 lines
2.7 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 MediaBrowser.Model.Logging;
namespace MediaBrowser.Server.Implementations.LiveTv.TunerHosts
{
public class MulticastStream
{
private readonly List<QueueStream> _outputStreams = new List<QueueStream>();
private const int BufferSize = 81920;
private CancellationToken _cancellationToken;
private readonly ILogger _logger;
public MulticastStream(ILogger logger)
{
_logger = logger;
}
public async Task CopyUntilCancelled(Stream source, Action onStarted, CancellationToken cancellationToken)
{
_cancellationToken = cancellationToken;
while (!cancellationToken.IsCancellationRequested)
{
byte[] buffer = new byte[BufferSize];
var bytesRead = await source.ReadAsync(buffer, 0, buffer.Length, cancellationToken).ConfigureAwait(false);
if (bytesRead > 0)
{
byte[] copy = new byte[bytesRead];
Buffer.BlockCopy(buffer, 0, copy, 0, bytesRead);
List<QueueStream> streams = null;
lock (_outputStreams)
{
streams = _outputStreams.ToList();
}
foreach (var stream in streams)
{
stream.Queue(copy);
}
if (onStarted != null)
{
var onStartedCopy = onStarted;
onStarted = null;
Task.Run(onStartedCopy);
}
}
else
{
await Task.Delay(100).ConfigureAwait(false);
}
}
}
public Task CopyToAsync(Stream stream)
{
var result = new QueueStream(stream, _logger)
{
OnFinished = OnFinished
};
lock (_outputStreams)
{
_outputStreams.Add(result);
}
result.Start(_cancellationToken);
return result.TaskCompletion.Task;
}
public void RemoveOutputStream(QueueStream stream)
{
lock (_outputStreams)
{
_outputStreams.Remove(stream);
}
}
private void OnFinished(QueueStream queueStream)
{
RemoveOutputStream(queueStream);
}
}
}