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jellyfin/MediaBrowser.MediaEncoding/Transcoding/TranscodeManager.cs

775 lines
28 KiB

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Text.Json;
using System.Threading;
using System.Threading.Tasks;
using AsyncKeyedLock;
using Jellyfin.Data.Enums;
using Jellyfin.Extensions;
using MediaBrowser.Common;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Controller.Session;
using MediaBrowser.Controller.Streaming;
using MediaBrowser.Model.Dlna;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.MediaInfo;
using MediaBrowser.Model.Session;
using Microsoft.Extensions.Logging;
namespace MediaBrowser.MediaEncoding.Transcoding;
/// <inheritdoc cref="ITranscodeManager"/>
public sealed class TranscodeManager : ITranscodeManager, IDisposable
{
private readonly ILoggerFactory _loggerFactory;
private readonly ILogger<TranscodeManager> _logger;
private readonly IFileSystem _fileSystem;
private readonly IApplicationPaths _appPaths;
private readonly IServerConfigurationManager _serverConfigurationManager;
private readonly IUserManager _userManager;
private readonly ISessionManager _sessionManager;
private readonly EncodingHelper _encodingHelper;
private readonly IMediaEncoder _mediaEncoder;
private readonly IMediaSourceManager _mediaSourceManager;
private readonly IAttachmentExtractor _attachmentExtractor;
private readonly List<TranscodingJob> _activeTranscodingJobs = new();
private readonly AsyncKeyedLocker<string> _transcodingLocks = new(o =>
{
o.PoolSize = 20;
o.PoolInitialFill = 1;
});
/// <summary>
/// Initializes a new instance of the <see cref="TranscodeManager"/> class.
/// </summary>
/// <param name="loggerFactory">The <see cref="ILoggerFactory"/>.</param>
/// <param name="fileSystem">The <see cref="IFileSystem"/>.</param>
/// <param name="appPaths">The <see cref="IApplicationPaths"/>.</param>
/// <param name="serverConfigurationManager">The <see cref="IServerConfigurationManager"/>.</param>
/// <param name="userManager">The <see cref="IUserManager"/>.</param>
/// <param name="sessionManager">The <see cref="ISessionManager"/>.</param>
/// <param name="encodingHelper">The <see cref="EncodingHelper"/>.</param>
/// <param name="mediaEncoder">The <see cref="IMediaEncoder"/>.</param>
/// <param name="mediaSourceManager">The <see cref="IMediaSourceManager"/>.</param>
/// <param name="attachmentExtractor">The <see cref="IAttachmentExtractor"/>.</param>
public TranscodeManager(
ILoggerFactory loggerFactory,
IFileSystem fileSystem,
IApplicationPaths appPaths,
IServerConfigurationManager serverConfigurationManager,
IUserManager userManager,
ISessionManager sessionManager,
EncodingHelper encodingHelper,
IMediaEncoder mediaEncoder,
IMediaSourceManager mediaSourceManager,
IAttachmentExtractor attachmentExtractor)
{
_loggerFactory = loggerFactory;
_fileSystem = fileSystem;
_appPaths = appPaths;
_serverConfigurationManager = serverConfigurationManager;
_userManager = userManager;
_sessionManager = sessionManager;
_encodingHelper = encodingHelper;
_mediaEncoder = mediaEncoder;
_mediaSourceManager = mediaSourceManager;
_attachmentExtractor = attachmentExtractor;
_logger = loggerFactory.CreateLogger<TranscodeManager>();
DeleteEncodedMediaCache();
_sessionManager.PlaybackProgress += OnPlaybackProgress;
_sessionManager.PlaybackStart += OnPlaybackProgress;
}
/// <inheritdoc />
public TranscodingJob? GetTranscodingJob(string playSessionId)
{
lock (_activeTranscodingJobs)
{
return _activeTranscodingJobs.FirstOrDefault(j => string.Equals(j.PlaySessionId, playSessionId, StringComparison.OrdinalIgnoreCase));
}
}
/// <inheritdoc />
public TranscodingJob? GetTranscodingJob(string path, TranscodingJobType type)
{
lock (_activeTranscodingJobs)
{
return _activeTranscodingJobs.FirstOrDefault(j => j.Type == type && string.Equals(j.Path, path, StringComparison.OrdinalIgnoreCase));
}
}
/// <inheritdoc />
public void PingTranscodingJob(string playSessionId, bool? isUserPaused)
{
ArgumentException.ThrowIfNullOrEmpty(playSessionId);
_logger.LogDebug("PingTranscodingJob PlaySessionId={0} isUsedPaused: {1}", playSessionId, isUserPaused);
List<TranscodingJob> jobs;
lock (_activeTranscodingJobs)
{
// This is really only needed for HLS.
// Progressive streams can stop on their own reliably.
jobs = _activeTranscodingJobs.Where(j => string.Equals(playSessionId, j.PlaySessionId, StringComparison.OrdinalIgnoreCase)).ToList();
}
foreach (var job in jobs)
{
if (isUserPaused.HasValue)
{
_logger.LogDebug("Setting job.IsUserPaused to {0}. jobId: {1}", isUserPaused, job.Id);
job.IsUserPaused = isUserPaused.Value;
}
PingTimer(job, true);
}
}
private void PingTimer(TranscodingJob job, bool isProgressCheckIn)
{
if (job.HasExited)
{
job.StopKillTimer();
return;
}
var timerDuration = 10000;
if (job.Type != TranscodingJobType.Progressive)
{
timerDuration = 60000;
}
job.PingTimeout = timerDuration;
job.LastPingDate = DateTime.UtcNow;
// Don't start the timer for playback checkins with progressive streaming
if (job.Type != TranscodingJobType.Progressive || !isProgressCheckIn)
{
job.StartKillTimer(OnTranscodeKillTimerStopped);
}
else
{
job.ChangeKillTimerIfStarted();
}
}
private async void OnTranscodeKillTimerStopped(object? state)
{
var job = state as TranscodingJob ?? throw new ArgumentException($"{nameof(state)} is not of type {nameof(TranscodingJob)}", nameof(state));
if (!job.HasExited && job.Type != TranscodingJobType.Progressive)
{
var timeSinceLastPing = (DateTime.UtcNow - job.LastPingDate).TotalMilliseconds;
if (timeSinceLastPing < job.PingTimeout)
{
job.StartKillTimer(OnTranscodeKillTimerStopped, job.PingTimeout);
return;
}
}
_logger.LogInformation("Transcoding kill timer stopped for JobId {0} PlaySessionId {1}. Killing transcoding", job.Id, job.PlaySessionId);
await KillTranscodingJob(job, true, path => true).ConfigureAwait(false);
}
/// <inheritdoc />
public Task KillTranscodingJobs(string deviceId, string? playSessionId, Func<string, bool> deleteFiles)
{
var jobs = new List<TranscodingJob>();
lock (_activeTranscodingJobs)
{
// This is really only needed for HLS.
// Progressive streams can stop on their own reliably.
jobs.AddRange(_activeTranscodingJobs.Where(j => string.IsNullOrWhiteSpace(playSessionId)
? string.Equals(deviceId, j.DeviceId, StringComparison.OrdinalIgnoreCase)
: string.Equals(playSessionId, j.PlaySessionId, StringComparison.OrdinalIgnoreCase)));
}
return Task.WhenAll(GetKillJobs());
IEnumerable<Task> GetKillJobs()
{
foreach (var job in jobs)
{
yield return KillTranscodingJob(job, false, deleteFiles);
}
}
}
private async Task KillTranscodingJob(TranscodingJob job, bool closeLiveStream, Func<string, bool> delete)
{
job.DisposeKillTimer();
_logger.LogDebug("KillTranscodingJob - JobId {0} PlaySessionId {1}. Killing transcoding", job.Id, job.PlaySessionId);
lock (_activeTranscodingJobs)
{
_activeTranscodingJobs.Remove(job);
if (job.CancellationTokenSource?.IsCancellationRequested == false)
{
#pragma warning disable CA1849 // Can't await in lock block
job.CancellationTokenSource.Cancel();
#pragma warning restore CA1849
}
}
job.Stop();
if (delete(job.Path!))
{
await DeletePartialStreamFiles(job.Path!, job.Type, 0, 1500).ConfigureAwait(false);
if (job.MediaSource?.VideoType == VideoType.Dvd || job.MediaSource?.VideoType == VideoType.BluRay)
{
var concatFilePath = Path.Join(_serverConfigurationManager.GetTranscodePath(), job.MediaSource.Id + ".concat");
if (File.Exists(concatFilePath))
{
_logger.LogInformation("Deleting ffmpeg concat configuration at {Path}", concatFilePath);
File.Delete(concatFilePath);
}
}
}
if (closeLiveStream && !string.IsNullOrWhiteSpace(job.LiveStreamId))
{
try
{
await _mediaSourceManager.CloseLiveStream(job.LiveStreamId).ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.LogError(ex, "Error closing live stream for {Path}", job.Path);
}
}
}
private async Task DeletePartialStreamFiles(string path, TranscodingJobType jobType, int retryCount, int delayMs)
{
if (retryCount >= 10)
{
return;
}
_logger.LogInformation("Deleting partial stream file(s) {Path}", path);
await Task.Delay(delayMs).ConfigureAwait(false);
try
{
if (jobType == TranscodingJobType.Progressive)
{
DeleteProgressivePartialStreamFiles(path);
}
else
{
DeleteHlsPartialStreamFiles(path);
}
}
catch (IOException ex)
{
_logger.LogError(ex, "Error deleting partial stream file(s) {Path}", path);
await DeletePartialStreamFiles(path, jobType, retryCount + 1, 500).ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.LogError(ex, "Error deleting partial stream file(s) {Path}", path);
}
}
private void DeleteProgressivePartialStreamFiles(string outputFilePath)
{
if (File.Exists(outputFilePath))
{
_fileSystem.DeleteFile(outputFilePath);
}
}
private void DeleteHlsPartialStreamFiles(string outputFilePath)
{
var directory = Path.GetDirectoryName(outputFilePath)
?? throw new ArgumentException("Path can't be a root directory.", nameof(outputFilePath));
var name = Path.GetFileNameWithoutExtension(outputFilePath);
var filesToDelete = _fileSystem.GetFilePaths(directory)
.Where(f => f.Contains(name, StringComparison.OrdinalIgnoreCase));
List<Exception>? exs = null;
foreach (var file in filesToDelete)
{
try
{
_logger.LogDebug("Deleting HLS file {0}", file);
_fileSystem.DeleteFile(file);
}
catch (IOException ex)
{
(exs ??= new List<Exception>()).Add(ex);
_logger.LogError(ex, "Error deleting HLS file {Path}", file);
}
}
if (exs is not null)
{
throw new AggregateException("Error deleting HLS files", exs);
}
}
/// <inheritdoc />
public void ReportTranscodingProgress(
TranscodingJob job,
StreamState state,
TimeSpan? transcodingPosition,
float? framerate,
double? percentComplete,
long? bytesTranscoded,
int? bitRate)
{
var ticks = transcodingPosition?.Ticks;
if (job is not null)
{
job.Framerate = framerate;
job.CompletionPercentage = percentComplete;
job.TranscodingPositionTicks = ticks;
job.BytesTranscoded = bytesTranscoded;
job.BitRate = bitRate;
}
var deviceId = state.Request.DeviceId;
if (!string.IsNullOrWhiteSpace(deviceId))
{
var audioCodec = state.ActualOutputAudioCodec;
var videoCodec = state.ActualOutputVideoCodec;
var hardwareAccelerationTypeString = _serverConfigurationManager.GetEncodingOptions().HardwareAccelerationType;
HardwareEncodingType? hardwareAccelerationType = null;
if (Enum.TryParse<HardwareEncodingType>(hardwareAccelerationTypeString, out var parsedHardwareAccelerationType))
{
hardwareAccelerationType = parsedHardwareAccelerationType;
}
_sessionManager.ReportTranscodingInfo(deviceId, new TranscodingInfo
{
Bitrate = bitRate ?? state.TotalOutputBitrate,
AudioCodec = audioCodec,
VideoCodec = videoCodec,
Container = state.OutputContainer,
Framerate = framerate,
CompletionPercentage = percentComplete,
Width = state.OutputWidth,
Height = state.OutputHeight,
AudioChannels = state.OutputAudioChannels,
IsAudioDirect = EncodingHelper.IsCopyCodec(state.OutputAudioCodec),
IsVideoDirect = EncodingHelper.IsCopyCodec(state.OutputVideoCodec),
HardwareAccelerationType = hardwareAccelerationType,
TranscodeReasons = state.TranscodeReasons
});
}
}
/// <inheritdoc />
public async Task<TranscodingJob> StartFfMpeg(
StreamState state,
string outputPath,
string commandLineArguments,
Guid userId,
TranscodingJobType transcodingJobType,
CancellationTokenSource cancellationTokenSource,
string? workingDirectory = null)
{
var directory = Path.GetDirectoryName(outputPath) ?? throw new ArgumentException($"Provided path ({outputPath}) is not valid.", nameof(outputPath));
Directory.CreateDirectory(directory);
await AcquireResources(state, cancellationTokenSource).ConfigureAwait(false);
if (state.VideoRequest is not null && !EncodingHelper.IsCopyCodec(state.OutputVideoCodec))
{
var user = userId.IsEmpty() ? null : _userManager.GetUserById(userId);
if (user is not null && !user.HasPermission(PermissionKind.EnableVideoPlaybackTranscoding))
{
OnTranscodeFailedToStart(outputPath, transcodingJobType, state);
throw new ArgumentException("User does not have access to video transcoding.");
}
}
ArgumentException.ThrowIfNullOrEmpty(_mediaEncoder.EncoderPath);
// If subtitles get burned in fonts may need to be extracted from the media file
if (state.SubtitleStream is not null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode)
{
var attachmentPath = Path.Combine(_appPaths.CachePath, "attachments", state.MediaSource.Id);
if (state.MediaSource.VideoType == VideoType.Dvd || state.MediaSource.VideoType == VideoType.BluRay)
{
var concatPath = Path.Join(_serverConfigurationManager.GetTranscodePath(), state.MediaSource.Id + ".concat");
await _attachmentExtractor.ExtractAllAttachments(concatPath, state.MediaSource, attachmentPath, cancellationTokenSource.Token).ConfigureAwait(false);
}
else
{
await _attachmentExtractor.ExtractAllAttachments(state.MediaPath, state.MediaSource, attachmentPath, cancellationTokenSource.Token).ConfigureAwait(false);
}
if (state.SubtitleStream.IsExternal && Path.GetExtension(state.SubtitleStream.Path.AsSpan()).Equals(".mks", StringComparison.OrdinalIgnoreCase))
{
string subtitlePath = state.SubtitleStream.Path;
string subtitlePathArgument = string.Format(CultureInfo.InvariantCulture, "file:\"{0}\"", subtitlePath.Replace("\"", "\\\"", StringComparison.Ordinal));
string subtitleId = subtitlePath.GetMD5().ToString("N", CultureInfo.InvariantCulture);
await _attachmentExtractor.ExtractAllAttachmentsExternal(subtitlePathArgument, subtitleId, attachmentPath, cancellationTokenSource.Token).ConfigureAwait(false);
}
}
var process = new Process
{
StartInfo = new ProcessStartInfo
{
WindowStyle = ProcessWindowStyle.Hidden,
CreateNoWindow = true,
UseShellExecute = false,
// Must consume both stdout and stderr or deadlocks may occur
// RedirectStandardOutput = true,
RedirectStandardError = true,
RedirectStandardInput = true,
FileName = _mediaEncoder.EncoderPath,
Arguments = commandLineArguments,
WorkingDirectory = string.IsNullOrWhiteSpace(workingDirectory) ? string.Empty : workingDirectory,
ErrorDialog = false
},
EnableRaisingEvents = true
};
var transcodingJob = OnTranscodeBeginning(
outputPath,
state.Request.PlaySessionId,
state.MediaSource.LiveStreamId,
Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture),
transcodingJobType,
process,
state.Request.DeviceId,
state,
cancellationTokenSource);
_logger.LogInformation("{Filename} {Arguments}", process.StartInfo.FileName, process.StartInfo.Arguments);
var logFilePrefix = "FFmpeg.Transcode-";
if (state.VideoRequest is not null
&& EncodingHelper.IsCopyCodec(state.OutputVideoCodec))
{
logFilePrefix = EncodingHelper.IsCopyCodec(state.OutputAudioCodec)
? "FFmpeg.Remux-"
: "FFmpeg.DirectStream-";
}
var logFilePath = Path.Combine(
_serverConfigurationManager.ApplicationPaths.LogDirectoryPath,
$"{logFilePrefix}{DateTime.Now:yyyy-MM-dd_HH-mm-ss}_{state.Request.MediaSourceId}_{Guid.NewGuid().ToString()[..8]}.log");
// FFmpeg writes debug/error info to stderr. This is useful when debugging so let's put it in the log directory.
Stream logStream = new FileStream(
logFilePath,
FileMode.Create,
FileAccess.Write,
FileShare.Read,
IODefaults.FileStreamBufferSize,
FileOptions.Asynchronous);
var commandLineLogMessage = process.StartInfo.FileName + " " + process.StartInfo.Arguments;
var commandLineLogMessageBytes = Encoding.UTF8.GetBytes(
JsonSerializer.Serialize(state.MediaSource)
+ Environment.NewLine
+ Environment.NewLine
+ commandLineLogMessage
+ Environment.NewLine
+ Environment.NewLine);
await logStream.WriteAsync(commandLineLogMessageBytes, cancellationTokenSource.Token).ConfigureAwait(false);
process.Exited += (_, _) => OnFfMpegProcessExited(process, transcodingJob, state);
try
{
process.Start();
}
catch (Exception ex)
{
_logger.LogError(ex, "Error starting FFmpeg");
OnTranscodeFailedToStart(outputPath, transcodingJobType, state);
throw;
}
_logger.LogDebug("Launched FFmpeg process");
state.TranscodingJob = transcodingJob;
// Important - don't await the log task or we won't be able to kill FFmpeg when the user stops playback
_ = new JobLogger(_logger).StartStreamingLog(state, process.StandardError, logStream);
// Wait for the file to exist before proceeding
var ffmpegTargetFile = state.WaitForPath ?? outputPath;
_logger.LogDebug("Waiting for the creation of {0}", ffmpegTargetFile);
while (!File.Exists(ffmpegTargetFile) && !transcodingJob.HasExited)
{
await Task.Delay(100, cancellationTokenSource.Token).ConfigureAwait(false);
}
_logger.LogDebug("File {0} created or transcoding has finished", ffmpegTargetFile);
if (state.IsInputVideo && transcodingJob.Type == TranscodingJobType.Progressive && !transcodingJob.HasExited)
{
await Task.Delay(1000, cancellationTokenSource.Token).ConfigureAwait(false);
if (state.ReadInputAtNativeFramerate && !transcodingJob.HasExited)
{
await Task.Delay(1500, cancellationTokenSource.Token).ConfigureAwait(false);
}
}
if (!transcodingJob.HasExited)
{
StartThrottler(state, transcodingJob);
StartSegmentCleaner(state, transcodingJob);
}
else if (transcodingJob.ExitCode != 0)
{
throw new FfmpegException(string.Format(CultureInfo.InvariantCulture, "FFmpeg exited with code {0}", transcodingJob.ExitCode));
}
_logger.LogDebug("StartFfMpeg() finished successfully");
return transcodingJob;
}
private void StartThrottler(StreamState state, TranscodingJob transcodingJob)
{
if (EnableThrottling(state))
{
transcodingJob.TranscodingThrottler = new TranscodingThrottler(transcodingJob, _loggerFactory.CreateLogger<TranscodingThrottler>(), _serverConfigurationManager, _fileSystem, _mediaEncoder);
transcodingJob.TranscodingThrottler.Start();
}
}
private static bool EnableThrottling(StreamState state)
=> state.InputProtocol == MediaProtocol.File
&& state.RunTimeTicks.HasValue
&& state.RunTimeTicks.Value >= TimeSpan.FromMinutes(5).Ticks
&& state.IsInputVideo
&& state.VideoType == VideoType.VideoFile;
private void StartSegmentCleaner(StreamState state, TranscodingJob transcodingJob)
{
if (EnableSegmentCleaning(state))
{
transcodingJob.TranscodingSegmentCleaner = new TranscodingSegmentCleaner(transcodingJob, _loggerFactory.CreateLogger<TranscodingSegmentCleaner>(), _serverConfigurationManager, _fileSystem, _mediaEncoder, state.SegmentLength);
transcodingJob.TranscodingSegmentCleaner.Start();
}
}
private static bool EnableSegmentCleaning(StreamState state)
=> state.InputProtocol is MediaProtocol.File or MediaProtocol.Http
&& state.IsInputVideo
&& state.TranscodingType == TranscodingJobType.Hls
&& state.RunTimeTicks.HasValue
&& state.RunTimeTicks.Value >= TimeSpan.FromMinutes(5).Ticks;
private TranscodingJob OnTranscodeBeginning(
string path,
string? playSessionId,
string? liveStreamId,
string transcodingJobId,
TranscodingJobType type,
Process process,
string? deviceId,
StreamState state,
CancellationTokenSource cancellationTokenSource)
{
lock (_activeTranscodingJobs)
{
var job = new TranscodingJob(_loggerFactory.CreateLogger<TranscodingJob>())
{
Type = type,
Path = path,
Process = process,
ActiveRequestCount = 1,
DeviceId = deviceId,
CancellationTokenSource = cancellationTokenSource,
Id = transcodingJobId,
PlaySessionId = playSessionId,
LiveStreamId = liveStreamId,
MediaSource = state.MediaSource
};
_activeTranscodingJobs.Add(job);
ReportTranscodingProgress(job, state, null, null, null, null, null);
return job;
}
}
/// <inheritdoc />
public void OnTranscodeEndRequest(TranscodingJob job)
{
job.ActiveRequestCount--;
_logger.LogDebug("OnTranscodeEndRequest job.ActiveRequestCount={ActiveRequestCount}", job.ActiveRequestCount);
if (job.ActiveRequestCount <= 0)
{
PingTimer(job, false);
}
}
private void OnTranscodeFailedToStart(string path, TranscodingJobType type, StreamState state)
{
lock (_activeTranscodingJobs)
{
var job = _activeTranscodingJobs.FirstOrDefault(j => j.Type == type && string.Equals(j.Path, path, StringComparison.OrdinalIgnoreCase));
if (job is not null)
{
_activeTranscodingJobs.Remove(job);
}
}
if (!string.IsNullOrWhiteSpace(state.Request.DeviceId))
{
_sessionManager.ClearTranscodingInfo(state.Request.DeviceId);
}
}
private void OnFfMpegProcessExited(Process process, TranscodingJob job, StreamState state)
{
job.HasExited = true;
job.ExitCode = process.ExitCode;
ReportTranscodingProgress(job, state, null, null, null, null, null);
_logger.LogDebug("Disposing stream resources");
state.Dispose();
if (process.ExitCode == 0)
{
_logger.LogInformation("FFmpeg exited with code 0");
}
else
{
_logger.LogError("FFmpeg exited with code {0}", process.ExitCode);
}
job.Dispose();
}
private async Task AcquireResources(StreamState state, CancellationTokenSource cancellationTokenSource)
{
if (state.MediaSource.RequiresOpening && string.IsNullOrWhiteSpace(state.Request.LiveStreamId))
{
var liveStreamResponse = await _mediaSourceManager.OpenLiveStream(
new LiveStreamRequest { OpenToken = state.MediaSource.OpenToken },
cancellationTokenSource.Token)
.ConfigureAwait(false);
var encodingOptions = _serverConfigurationManager.GetEncodingOptions();
_encodingHelper.AttachMediaSourceInfo(state, encodingOptions, liveStreamResponse.MediaSource, state.RequestedUrl);
if (state.VideoRequest is not null)
{
_encodingHelper.TryStreamCopy(state);
}
}
if (state.MediaSource.BufferMs.HasValue)
{
await Task.Delay(state.MediaSource.BufferMs.Value, cancellationTokenSource.Token).ConfigureAwait(false);
}
}
/// <inheritdoc />
public TranscodingJob? OnTranscodeBeginRequest(string path, TranscodingJobType type)
{
lock (_activeTranscodingJobs)
{
var job = _activeTranscodingJobs
.FirstOrDefault(j => j.Type == type && string.Equals(j.Path, path, StringComparison.OrdinalIgnoreCase));
if (job is null)
{
return null;
}
job.ActiveRequestCount++;
if (string.IsNullOrWhiteSpace(job.PlaySessionId) || job.Type == TranscodingJobType.Progressive)
{
job.StopKillTimer();
}
return job;
}
}
private void OnPlaybackProgress(object? sender, PlaybackProgressEventArgs e)
{
if (!string.IsNullOrWhiteSpace(e.PlaySessionId))
{
PingTranscodingJob(e.PlaySessionId, e.IsPaused);
}
}
private void DeleteEncodedMediaCache()
{
var path = _serverConfigurationManager.GetTranscodePath();
if (!Directory.Exists(path))
{
return;
}
foreach (var file in _fileSystem.GetFilePaths(path, true))
{
try
{
_fileSystem.DeleteFile(file);
}
catch (Exception ex)
{
_logger.LogError(ex, "Error deleting encoded media cache file {Path}", path);
}
}
}
/// <summary>
/// Transcoding lock.
/// </summary>
/// <param name="outputPath">The output path of the transcoded file.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>An <see cref="IDisposable"/>.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public ValueTask<IDisposable> LockAsync(string outputPath, CancellationToken cancellationToken)
{
return _transcodingLocks.LockAsync(outputPath, cancellationToken);
}
/// <inheritdoc />
public void Dispose()
{
_sessionManager.PlaybackProgress -= OnPlaybackProgress;
_sessionManager.PlaybackStart -= OnPlaybackProgress;
_transcodingLocks.Dispose();
}
}