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improve video startup performance

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This commit is contained in:
Luke Pulverenti 2017-02-01 15:55:56 -05:00
parent 1d849e3f25
commit 30538f0731
4 changed files with 47 additions and 39 deletions
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37
Emby.Server.Implementations/LiveTv/TunerHosts/MulticastStream.cs
View file

@ -1,4 +1,5 @@
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Linq;
@ -11,10 +12,11 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
{
public class MulticastStream
{
private readonly List<QueueStream> _outputStreams = new List<QueueStream>();
private readonly ConcurrentDictionary<Guid,QueueStream> _outputStreams = new ConcurrentDictionary<Guid, QueueStream>();
private const int BufferSize = 81920;
private CancellationToken _cancellationToken;
private readonly ILogger _logger;
private readonly ConcurrentQueue<byte[]> _sharedBuffer = new ConcurrentQueue<byte[]>();
public MulticastStream(ILogger logger)
{
@ -35,17 +37,19 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
{
byte[] copy = new byte[bytesRead];
Buffer.BlockCopy(buffer, 0, copy, 0, bytesRead);
List<QueueStream> streams = null;
lock (_outputStreams)
_sharedBuffer.Enqueue(copy);
while (_sharedBuffer.Count > 3000)
{
streams = _outputStreams.ToList();
byte[] bytes;
_sharedBuffer.TryDequeue(out bytes);
}
foreach (var stream in streams)
var allStreams = _outputStreams.ToList();
foreach (var stream in allStreams)
{
stream.Queue(copy);
stream.Value.Queue(copy);
}
if (onStarted != null)
@ -70,11 +74,20 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
OnFinished = OnFinished
};
lock (_outputStreams)
var initial = _sharedBuffer.ToList();
var list = new List<byte>();
foreach (var bytes in initial)
{
_outputStreams.Add(result);
list.AddRange(bytes);
}
_logger.Info("QueueStream started with {0} initial bytes", list.Count);
result.Queue(list.ToArray());
_outputStreams.TryAdd(result.Id, result);
result.Start(_cancellationToken);
return result.TaskCompletion.Task;
@ -82,10 +95,8 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
public void RemoveOutputStream(QueueStream stream)
{
lock (_outputStreams)
{
_outputStreams.Remove(stream);
}
QueueStream removed;
_outputStreams.TryRemove(stream.Id, out removed);
}
private void OnFinished(QueueStream queueStream)

16
Emby.Server.Implementations/LiveTv/TunerHosts/QueueStream.cs
View file

@ -19,7 +19,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
public Action<QueueStream> OnFinished { get; set; }
private readonly ILogger _logger;
private bool _isActive;
public Guid Id = Guid.NewGuid();
public QueueStream(Stream outputStream, ILogger logger)
{
@ -30,10 +30,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
public void Queue(byte[] bytes)
{
if (_isActive)
{
_queue.Enqueue(bytes);
}
_queue.Enqueue(bytes);
}
public void Start(CancellationToken cancellationToken)
@ -59,10 +56,8 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
try
{
while (!cancellationToken.IsCancellationRequested)
while (true)
{
_isActive = true;
var bytes = Dequeue();
if (bytes != null)
{
@ -73,9 +68,6 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
await Task.Delay(50, cancellationToken).ConfigureAwait(false);
}
}
TaskCompletion.TrySetResult(true);
_logger.Debug("QueueStream complete");
}
catch (OperationCanceledException)
{
@ -89,8 +81,6 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
}
finally
{
_isActive = false;
if (OnFinished != null)
{
OnFinished(this);

31
MediaBrowser.Api/Playback/BaseStreamingService.cs
View file

@ -2720,6 +2720,15 @@ namespace MediaBrowser.Api.Playback
//inputModifier += " -noaccurate_seek";
}
if (!string.IsNullOrWhiteSpace(state.InputContainer))
{
var inputFormat = GetInputFormat(state.InputContainer);
if (!string.IsNullOrWhiteSpace(inputFormat))
{
inputModifier += " -f " + inputFormat;
}
}
if (state.RunTimeTicks.HasValue)
{
foreach (var stream in state.MediaSource.MediaStreams)
@ -2738,23 +2747,21 @@ namespace MediaBrowser.Api.Playback
}
}
}
//var videoStream = state.VideoStream;
//if (videoStream != null && !string.IsNullOrWhiteSpace(videoStream.Codec))
//{
// inputModifier += " -codec:0 " + videoStream.Codec;
// var audioStream = state.AudioStream;
// if (audioStream != null && !string.IsNullOrWhiteSpace(audioStream.Codec))
// {
// inputModifier += " -codec:1 " + audioStream.Codec;
// }
//}
}
return inputModifier;
}
private string GetInputFormat(string container)
{
if (string.Equals(container, "mkv", StringComparison.OrdinalIgnoreCase))
{
return "matroska";
}
return container;
}
private string GetDecoderFromCodec(string codec)
{
if (string.Equals(codec, "mp2", StringComparison.OrdinalIgnoreCase))

2
MediaBrowser.Api/Playback/Hls/BaseHlsService.cs
View file

@ -103,7 +103,7 @@ namespace MediaBrowser.Api.Playback.Hls
throw;
}
var waitForSegments = state.SegmentLength >= 10 ? 2 : 3;
var waitForSegments = state.SegmentLength >= 10 ? 2 : 2;
await WaitForMinimumSegmentCount(playlist, waitForSegments, cancellationTokenSource.Token).ConfigureAwait(false);
}
}