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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)
{
byte[] buffer = new byte[BufferSize];
if (source == null)
{
throw new ArgumentNullException("source");
}
while (true)
{
cancellationToken.ThrowIfCancellationRequested();
var bytesRead = source.Read(buffer, 0, buffer.Length);
if (bytesRead > 0)
{
var allStreams = _outputStreams.ToList();
//if (allStreams.Count == 1)
//{
// await allStreams[0].Value.WriteAsync(buffer, 0, bytesRead).ConfigureAwait(false);
//}
//else
{
byte[] copy = new byte[bytesRead];
Buffer.BlockCopy(buffer, 0, copy, 0, bytesRead);
foreach (var stream in allStreams)
{
stream.Value.Queue(copy, 0, copy.Length);
}
}
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 result = new QueueStream(stream, _logger)
{
OnFinished = OnFinished
};
_outputStreams.TryAdd(result.Id, result);
result.Start(cancellationToken);
return result.TaskCompletion.Task;
}
public void RemoveOutputStream(QueueStream stream)
{
QueueStream removed;
_outputStreams.TryRemove(stream.Id, out removed);
}
private void OnFinished(QueueStream queueStream)
{
RemoveOutputStream(queueStream);
}
}
}
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