From f45d44f32150b53231af9651021d1dee690775f1 Mon Sep 17 00:00:00 2001 From: crobibero Date: Fri, 26 Jun 2020 21:04:02 -0600 Subject: Move PlaystateService.cs to Jellyfin.Api --- Jellyfin.Api/Helpers/TranscodingJobHelper.cs | 354 +++++++++++++++++++++++++++ 1 file changed, 354 insertions(+) create mode 100644 Jellyfin.Api/Helpers/TranscodingJobHelper.cs (limited to 'Jellyfin.Api/Helpers/TranscodingJobHelper.cs') diff --git a/Jellyfin.Api/Helpers/TranscodingJobHelper.cs b/Jellyfin.Api/Helpers/TranscodingJobHelper.cs new file mode 100644 index 000000000..44f662e6e --- /dev/null +++ b/Jellyfin.Api/Helpers/TranscodingJobHelper.cs @@ -0,0 +1,354 @@ +using System; +using System.Collections.Generic; +using System.Diagnostics; +using System.IO; +using System.Linq; +using System.Threading; +using System.Threading.Tasks; +using Jellyfin.Api.Models.PlaybackDtos; +using MediaBrowser.Controller.Library; +using MediaBrowser.Controller.MediaEncoding; +using MediaBrowser.Model.IO; +using Microsoft.Extensions.Logging; + +namespace Jellyfin.Api.Helpers +{ + /// + /// Transcoding job helpers. + /// + public class TranscodingJobHelper + { + /// + /// The active transcoding jobs. + /// + private static readonly List _activeTranscodingJobs = new List(); + + /// + /// The transcoding locks. + /// + private static readonly Dictionary _transcodingLocks = new Dictionary(); + + private readonly ILogger _logger; + private readonly IMediaSourceManager _mediaSourceManager; + private readonly IFileSystem _fileSystem; + + /// + /// Initializes a new instance of the class. + /// + /// Instance of the interface. + /// Instance of the interface. + /// Instance of the interface. + public TranscodingJobHelper( + ILogger logger, + IMediaSourceManager mediaSourceManager, + IFileSystem fileSystem) + { + _logger = logger; + _mediaSourceManager = mediaSourceManager; + _fileSystem = fileSystem; + } + + /// + /// Get transcoding job. + /// + /// Playback session id. + /// The transcoding job. + public TranscodingJobDto GetTranscodingJob(string playSessionId) + { + lock (_activeTranscodingJobs) + { + return _activeTranscodingJobs.FirstOrDefault(j => string.Equals(j.PlaySessionId, playSessionId, StringComparison.OrdinalIgnoreCase)); + } + } + + /// + /// Ping transcoding job. + /// + /// Play session id. + /// Is user paused. + /// Play session id is null. + public void PingTranscodingJob(string playSessionId, bool? isUserPaused) + { + if (string.IsNullOrEmpty(playSessionId)) + { + throw new ArgumentNullException(nameof(playSessionId)); + } + + _logger.LogDebug("PingTranscodingJob PlaySessionId={0} isUsedPaused: {1}", playSessionId, isUserPaused); + + List 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(TranscodingJobDto 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(); + } + } + + /// + /// Called when [transcode kill timer stopped]. + /// + /// The state. + private async void OnTranscodeKillTimerStopped(object state) + { + var job = (TranscodingJobDto)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); + } + + /// + /// Kills the single transcoding job. + /// + /// The device id. + /// The play session identifier. + /// The delete files. + /// Task. + public Task KillTranscodingJobs(string deviceId, string playSessionId, Func deleteFiles) + { + return KillTranscodingJobs( + j => string.IsNullOrWhiteSpace(playSessionId) + ? string.Equals(deviceId, j.DeviceId, StringComparison.OrdinalIgnoreCase) + : string.Equals(playSessionId, j.PlaySessionId, StringComparison.OrdinalIgnoreCase), deleteFiles); + } + + /// + /// Kills the transcoding jobs. + /// + /// The kill job. + /// The delete files. + /// Task. + private Task KillTranscodingJobs(Func killJob, Func deleteFiles) + { + var jobs = new List(); + + lock (_activeTranscodingJobs) + { + // This is really only needed for HLS. + // Progressive streams can stop on their own reliably + jobs.AddRange(_activeTranscodingJobs.Where(killJob)); + } + + if (jobs.Count == 0) + { + return Task.CompletedTask; + } + + IEnumerable GetKillJobs() + { + foreach (var job in jobs) + { + yield return KillTranscodingJob(job, false, deleteFiles); + } + } + + return Task.WhenAll(GetKillJobs()); + } + + /// + /// Kills the transcoding job. + /// + /// The job. + /// if set to true [close live stream]. + /// The delete. + private async Task KillTranscodingJob(TranscodingJobDto job, bool closeLiveStream, Func 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) + { + job.CancellationTokenSource.Cancel(); + } + } + + lock (_transcodingLocks) + { + _transcodingLocks.Remove(job.Path!); + } + + lock (job.ProcessLock!) + { + job.TranscodingThrottler?.Stop().GetAwaiter().GetResult(); + + var process = job.Process; + + var hasExited = job.HasExited; + + if (!hasExited) + { + try + { + _logger.LogInformation("Stopping ffmpeg process with q command for {Path}", job.Path); + + process!.StandardInput.WriteLine("q"); + + // Need to wait because killing is asynchronous + if (!process.WaitForExit(5000)) + { + _logger.LogInformation("Killing ffmpeg process for {Path}", job.Path); + process.Kill(); + } + } + catch (InvalidOperationException) + { + } + } + } + + if (delete(job.Path!)) + { + await DeletePartialStreamFiles(job.Path!, job.Type, 0, 1500).ConfigureAwait(false); + } + + 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); + } + } + + /// + /// Deletes the progressive partial stream files. + /// + /// The output file path. + private void DeleteProgressivePartialStreamFiles(string outputFilePath) + { + if (File.Exists(outputFilePath)) + { + _fileSystem.DeleteFile(outputFilePath); + } + } + + /// + /// Deletes the HLS partial stream files. + /// + /// The output file path. + private void DeleteHlsPartialStreamFiles(string outputFilePath) + { + var directory = Path.GetDirectoryName(outputFilePath); + var name = Path.GetFileNameWithoutExtension(outputFilePath); + + var filesToDelete = _fileSystem.GetFilePaths(directory) + .Where(f => f.IndexOf(name, StringComparison.OrdinalIgnoreCase) != -1); + + List? exs = null; + foreach (var file in filesToDelete) + { + try + { + _logger.LogDebug("Deleting HLS file {0}", file); + _fileSystem.DeleteFile(file); + } + catch (IOException ex) + { + (exs ??= new List(4)).Add(ex); + _logger.LogError(ex, "Error deleting HLS file {Path}", file); + } + } + + if (exs != null) + { + throw new AggregateException("Error deleting HLS files", exs); + } + } + } +} -- cgit v1.2.3