693 lines
23 KiB
C#
693 lines
23 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using MediaBrowser.Api.Playback;
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.MediaEncoding;
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using MediaBrowser.Controller.Plugins;
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using MediaBrowser.Controller.Session;
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using MediaBrowser.Model.Configuration;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Session;
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using Microsoft.Extensions.Logging;
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namespace MediaBrowser.Api
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{
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/// <summary>
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/// Class ServerEntryPoint.
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/// </summary>
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public class ApiEntryPoint : IServerEntryPoint
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{
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/// <summary>
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/// The instance.
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/// </summary>
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public static ApiEntryPoint Instance;
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/// <summary>
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/// The logger.
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/// </summary>
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private ILogger _logger;
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/// <summary>
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/// The configuration manager.
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/// </summary>
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private IServerConfigurationManager _serverConfigurationManager;
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private readonly ISessionManager _sessionManager;
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private readonly IFileSystem _fileSystem;
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private readonly IMediaSourceManager _mediaSourceManager;
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/// <summary>
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/// The active transcoding jobs
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/// </summary>
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private readonly List<TranscodingJob> _activeTranscodingJobs = new List<TranscodingJob>();
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private readonly Dictionary<string, SemaphoreSlim> _transcodingLocks =
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new Dictionary<string, SemaphoreSlim>();
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private bool _disposed = false;
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/// <summary>
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/// Initializes a new instance of the <see cref="ApiEntryPoint" /> class.
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/// </summary>
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/// <param name="logger">The logger.</param>
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/// <param name="sessionManager">The session manager.</param>
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/// <param name="config">The configuration.</param>
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/// <param name="fileSystem">The file system.</param>
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/// <param name="mediaSourceManager">The media source manager.</param>
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public ApiEntryPoint(
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ILogger logger,
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ISessionManager sessionManager,
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IServerConfigurationManager config,
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IFileSystem fileSystem,
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IMediaSourceManager mediaSourceManager)
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{
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_logger = logger;
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_sessionManager = sessionManager;
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_serverConfigurationManager = config;
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_fileSystem = fileSystem;
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_mediaSourceManager = mediaSourceManager;
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_sessionManager.PlaybackProgress += OnPlaybackProgress;
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_sessionManager.PlaybackStart += OnPlaybackStart;
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Instance = this;
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}
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public static string[] Split(string value, char separator, bool removeEmpty)
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{
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if (string.IsNullOrWhiteSpace(value))
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{
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return Array.Empty<string>();
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}
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if (removeEmpty)
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{
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return value.Split(new[] { separator }, StringSplitOptions.RemoveEmptyEntries);
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}
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return value.Split(separator);
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}
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public SemaphoreSlim GetTranscodingLock(string outputPath)
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{
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lock (_transcodingLocks)
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{
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if (!_transcodingLocks.TryGetValue(outputPath, out SemaphoreSlim result))
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{
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result = new SemaphoreSlim(1, 1);
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_transcodingLocks[outputPath] = result;
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}
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return result;
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}
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}
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private void OnPlaybackStart(object sender, PlaybackProgressEventArgs e)
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{
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if (!string.IsNullOrWhiteSpace(e.PlaySessionId))
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{
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PingTranscodingJob(e.PlaySessionId, e.IsPaused);
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}
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}
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private void OnPlaybackProgress(object sender, PlaybackProgressEventArgs e)
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{
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if (!string.IsNullOrWhiteSpace(e.PlaySessionId))
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{
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PingTranscodingJob(e.PlaySessionId, e.IsPaused);
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}
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}
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/// <summary>
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/// Runs this instance.
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/// </summary>
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public Task RunAsync()
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{
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try
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{
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DeleteEncodedMediaCache();
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error deleting encoded media cache");
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}
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return Task.CompletedTask;
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}
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/// <summary>
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/// Deletes the encoded media cache.
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/// </summary>
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private void DeleteEncodedMediaCache()
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{
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var path = _serverConfigurationManager.GetTranscodePath();
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if (!Directory.Exists(path))
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{
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return;
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}
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foreach (var file in _fileSystem.GetFilePaths(path, true))
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{
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_fileSystem.DeleteFile(file);
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}
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}
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/// <inheritdoc />
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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/// <summary>
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/// Releases unmanaged and - optionally - managed resources.
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/// </summary>
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/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
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protected virtual void Dispose(bool dispose)
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{
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if (_disposed)
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{
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return;
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}
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if (dispose)
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{
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// TODO: dispose
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}
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var jobs = _activeTranscodingJobs.ToList();
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var jobCount = jobs.Count;
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IEnumerable<Task> GetKillJobs()
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{
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foreach (var job in jobs)
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{
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yield return KillTranscodingJob(job, false, path => true);
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}
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}
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// Wait for all processes to be killed
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if (jobCount > 0)
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{
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Task.WaitAll(GetKillJobs().ToArray());
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}
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_activeTranscodingJobs.Clear();
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_transcodingLocks.Clear();
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_sessionManager.PlaybackProgress -= OnPlaybackProgress;
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_sessionManager.PlaybackStart -= OnPlaybackStart;
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_disposed = true;
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}
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/// <summary>
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/// Called when [transcode beginning].
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/// </summary>
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/// <param name="path">The path.</param>
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/// <param name="playSessionId">The play session identifier.</param>
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/// <param name="liveStreamId">The live stream identifier.</param>
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/// <param name="transcodingJobId">The transcoding job identifier.</param>
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/// <param name="type">The type.</param>
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/// <param name="process">The process.</param>
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/// <param name="deviceId">The device id.</param>
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/// <param name="state">The state.</param>
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/// <param name="cancellationTokenSource">The cancellation token source.</param>
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/// <returns>TranscodingJob.</returns>
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public TranscodingJob OnTranscodeBeginning(
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string path,
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string playSessionId,
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string liveStreamId,
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string transcodingJobId,
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TranscodingJobType type,
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Process process,
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string deviceId,
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StreamState state,
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CancellationTokenSource cancellationTokenSource)
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{
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lock (_activeTranscodingJobs)
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{
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var job = new TranscodingJob(_logger)
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{
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Type = type,
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Path = path,
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Process = process,
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ActiveRequestCount = 1,
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DeviceId = deviceId,
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CancellationTokenSource = cancellationTokenSource,
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Id = transcodingJobId,
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PlaySessionId = playSessionId,
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LiveStreamId = liveStreamId,
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MediaSource = state.MediaSource
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};
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_activeTranscodingJobs.Add(job);
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ReportTranscodingProgress(job, state, null, null, null, null, null);
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return job;
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}
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}
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public void ReportTranscodingProgress(TranscodingJob job, StreamState state, TimeSpan? transcodingPosition, float? framerate, double? percentComplete, long? bytesTranscoded, int? bitRate)
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{
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var ticks = transcodingPosition.HasValue ? transcodingPosition.Value.Ticks : (long?)null;
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if (job != null)
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{
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job.Framerate = framerate;
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job.CompletionPercentage = percentComplete;
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job.TranscodingPositionTicks = ticks;
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job.BytesTranscoded = bytesTranscoded;
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job.BitRate = bitRate;
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}
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var deviceId = state.Request.DeviceId;
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if (!string.IsNullOrWhiteSpace(deviceId))
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{
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var audioCodec = state.ActualOutputAudioCodec;
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var videoCodec = state.ActualOutputVideoCodec;
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_sessionManager.ReportTranscodingInfo(deviceId, new TranscodingInfo
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{
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Bitrate = bitRate ?? state.TotalOutputBitrate,
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AudioCodec = audioCodec,
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VideoCodec = videoCodec,
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Container = state.OutputContainer,
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Framerate = framerate,
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CompletionPercentage = percentComplete,
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Width = state.OutputWidth,
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Height = state.OutputHeight,
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AudioChannels = state.OutputAudioChannels,
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IsAudioDirect = string.Equals(state.OutputAudioCodec, "copy", StringComparison.OrdinalIgnoreCase),
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IsVideoDirect = string.Equals(state.OutputVideoCodec, "copy", StringComparison.OrdinalIgnoreCase),
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TranscodeReasons = state.TranscodeReasons
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});
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}
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}
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/// <summary>
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/// <summary>
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/// The progressive
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/// </summary>
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/// Called when [transcode failed to start].
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/// </summary>
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/// <param name="path">The path.</param>
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/// <param name="type">The type.</param>
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/// <param name="state">The state.</param>
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public void OnTranscodeFailedToStart(string path, TranscodingJobType type, StreamState state)
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{
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lock (_activeTranscodingJobs)
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{
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var job = _activeTranscodingJobs.FirstOrDefault(j => j.Type == type && string.Equals(j.Path, path, StringComparison.OrdinalIgnoreCase));
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if (job != null)
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{
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_activeTranscodingJobs.Remove(job);
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}
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}
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lock (_transcodingLocks)
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{
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_transcodingLocks.Remove(path);
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}
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if (!string.IsNullOrWhiteSpace(state.Request.DeviceId))
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{
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_sessionManager.ClearTranscodingInfo(state.Request.DeviceId);
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}
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}
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/// <summary>
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/// Determines whether [has active transcoding job] [the specified path].
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/// </summary>
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/// <param name="path">The path.</param>
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/// <param name="type">The type.</param>
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/// <returns><c>true</c> if [has active transcoding job] [the specified path]; otherwise, <c>false</c>.</returns>
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public bool HasActiveTranscodingJob(string path, TranscodingJobType type)
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{
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return GetTranscodingJob(path, type) != null;
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}
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public TranscodingJob GetTranscodingJob(string path, TranscodingJobType type)
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{
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lock (_activeTranscodingJobs)
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{
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return _activeTranscodingJobs.FirstOrDefault(j => j.Type == type && string.Equals(j.Path, path, StringComparison.OrdinalIgnoreCase));
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}
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}
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public TranscodingJob GetTranscodingJob(string playSessionId)
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{
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lock (_activeTranscodingJobs)
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{
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return _activeTranscodingJobs.FirstOrDefault(j => string.Equals(j.PlaySessionId, playSessionId, StringComparison.OrdinalIgnoreCase));
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}
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}
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/// <summary>
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/// Called when [transcode begin request].
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/// </summary>
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/// <param name="path">The path.</param>
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/// <param name="type">The type.</param>
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public TranscodingJob OnTranscodeBeginRequest(string path, TranscodingJobType type)
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{
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lock (_activeTranscodingJobs)
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{
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var job = _activeTranscodingJobs.FirstOrDefault(j => j.Type == type && string.Equals(j.Path, path, StringComparison.OrdinalIgnoreCase));
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if (job == null)
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{
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return null;
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}
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OnTranscodeBeginRequest(job);
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return job;
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}
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}
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public void OnTranscodeBeginRequest(TranscodingJob job)
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{
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job.ActiveRequestCount++;
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if (string.IsNullOrWhiteSpace(job.PlaySessionId) || job.Type == TranscodingJobType.Progressive)
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{
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job.StopKillTimer();
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}
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}
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public void OnTranscodeEndRequest(TranscodingJob job)
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{
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job.ActiveRequestCount--;
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_logger.LogDebug("OnTranscodeEndRequest job.ActiveRequestCount={0}", job.ActiveRequestCount);
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if (job.ActiveRequestCount <= 0)
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{
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PingTimer(job, false);
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}
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}
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internal void PingTranscodingJob(string playSessionId, bool? isUserPaused)
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{
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if (string.IsNullOrEmpty(playSessionId))
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{
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throw new ArgumentNullException(nameof(playSessionId));
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}
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_logger.LogDebug("PingTranscodingJob PlaySessionId={0} isUsedPaused: {1}", playSessionId, isUserPaused);
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List<TranscodingJob> jobs;
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lock (_activeTranscodingJobs)
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{
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// This is really only needed for HLS.
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// Progressive streams can stop on their own reliably
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jobs = _activeTranscodingJobs.Where(j => string.Equals(playSessionId, j.PlaySessionId, StringComparison.OrdinalIgnoreCase)).ToList();
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}
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foreach (var job in jobs)
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{
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if (isUserPaused.HasValue)
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{
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_logger.LogDebug("Setting job.IsUserPaused to {0}. jobId: {1}", isUserPaused, job.Id);
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job.IsUserPaused = isUserPaused.Value;
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}
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PingTimer(job, true);
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}
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}
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private void PingTimer(TranscodingJob job, bool isProgressCheckIn)
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{
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if (job.HasExited)
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{
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job.StopKillTimer();
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return;
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}
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var timerDuration = 10000;
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if (job.Type != TranscodingJobType.Progressive)
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{
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timerDuration = 60000;
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}
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job.PingTimeout = timerDuration;
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job.LastPingDate = DateTime.UtcNow;
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// Don't start the timer for playback checkins with progressive streaming
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if (job.Type != TranscodingJobType.Progressive || !isProgressCheckIn)
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{
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job.StartKillTimer(OnTranscodeKillTimerStopped);
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}
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else
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{
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job.ChangeKillTimerIfStarted();
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}
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}
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/// <summary>
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/// Called when [transcode kill timer stopped].
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/// </summary>
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/// <param name="state">The state.</param>
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private async void OnTranscodeKillTimerStopped(object state)
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{
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var job = (TranscodingJob)state;
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if (!job.HasExited && job.Type != TranscodingJobType.Progressive)
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{
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var timeSinceLastPing = (DateTime.UtcNow - job.LastPingDate).TotalMilliseconds;
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if (timeSinceLastPing < job.PingTimeout)
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{
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job.StartKillTimer(OnTranscodeKillTimerStopped, job.PingTimeout);
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return;
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}
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}
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_logger.LogInformation("Transcoding kill timer stopped for JobId {0} PlaySessionId {1}. Killing transcoding", job.Id, job.PlaySessionId);
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await KillTranscodingJob(job, true, path => true);
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}
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/// <summary>
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/// Kills the single transcoding job.
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/// </summary>
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/// <param name="deviceId">The device id.</param>
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/// <param name="playSessionId">The play session identifier.</param>
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/// <param name="deleteFiles">The delete files.</param>
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/// <returns>Task.</returns>
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internal Task KillTranscodingJobs(string deviceId, string playSessionId, Func<string, bool> deleteFiles)
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{
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return KillTranscodingJobs(j =>
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{
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if (!string.IsNullOrWhiteSpace(playSessionId))
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{
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return string.Equals(playSessionId, j.PlaySessionId, StringComparison.OrdinalIgnoreCase);
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}
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return string.Equals(deviceId, j.DeviceId, StringComparison.OrdinalIgnoreCase);
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}, deleteFiles);
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}
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/// <summary>
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/// Kills the transcoding jobs.
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/// </summary>
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/// <param name="killJob">The kill job.</param>
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/// <param name="deleteFiles">The delete files.</param>
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/// <returns>Task.</returns>
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private Task KillTranscodingJobs(Func<TranscodingJob, bool> killJob, Func<string, bool> deleteFiles)
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{
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var jobs = new List<TranscodingJob>();
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lock (_activeTranscodingJobs)
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{
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// This is really only needed for HLS.
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// Progressive streams can stop on their own reliably
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jobs.AddRange(_activeTranscodingJobs.Where(killJob));
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}
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if (jobs.Count == 0)
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{
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return Task.CompletedTask;
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}
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IEnumerable<Task> GetKillJobs()
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{
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foreach (var job in jobs)
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{
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yield return KillTranscodingJob(job, false, deleteFiles);
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}
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}
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return Task.WhenAll(GetKillJobs());
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}
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/// <summary>
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/// Kills the transcoding job.
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/// </summary>
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/// <param name="job">The job.</param>
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/// <param name="closeLiveStream">if set to <c>true</c> [close live stream].</param>
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/// <param name="delete">The delete.</param>
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private async Task KillTranscodingJob(TranscodingJob job, bool closeLiveStream, Func<string, bool> delete)
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{
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job.DisposeKillTimer();
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_logger.LogDebug("KillTranscodingJob - JobId {0} PlaySessionId {1}. Killing transcoding", job.Id, job.PlaySessionId);
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lock (_activeTranscodingJobs)
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{
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_activeTranscodingJobs.Remove(job);
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if (!job.CancellationTokenSource.IsCancellationRequested)
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{
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job.CancellationTokenSource.Cancel();
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}
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}
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lock (_transcodingLocks)
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{
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_transcodingLocks.Remove(job.Path);
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}
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lock (job.ProcessLock)
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{
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if (job.TranscodingThrottler != null)
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{
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job.TranscodingThrottler.Stop().GetAwaiter().GetResult();
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}
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var process = job.Process;
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|
|
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);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Deletes the progressive partial stream files.
|
|
/// </summary>
|
|
/// <param name="outputFilePath">The output file path.</param>
|
|
private void DeleteProgressivePartialStreamFiles(string outputFilePath)
|
|
{
|
|
if (File.Exists(outputFilePath))
|
|
{
|
|
_fileSystem.DeleteFile(outputFilePath);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Deletes the HLS partial stream files.
|
|
/// </summary>
|
|
/// <param name="outputFilePath">The output file path.</param>
|
|
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<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>(4)).Add(ex);
|
|
_logger.LogError(ex, "Error deleting HLS file {Path}", file);
|
|
}
|
|
}
|
|
|
|
if (exs != null)
|
|
{
|
|
throw new AggregateException("Error deleting HLS files", exs);
|
|
}
|
|
}
|
|
}
|
|
}
|