jellyfin-server/MediaBrowser.Api/ApiEntryPoint.cs
2013-12-22 13:58:51 -05:00

463 lines
15 KiB
C#

using MediaBrowser.Controller;
using MediaBrowser.Controller.Plugins;
using MediaBrowser.Controller.Resolvers;
using MediaBrowser.Model.Logging;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
namespace MediaBrowser.Api
{
/// <summary>
/// Class ServerEntryPoint
/// </summary>
public class ApiEntryPoint : IServerEntryPoint
{
/// <summary>
/// The instance
/// </summary>
public static ApiEntryPoint Instance;
/// <summary>
/// Gets or sets the logger.
/// </summary>
/// <value>The logger.</value>
private ILogger Logger { get; set; }
/// <summary>
/// The application paths
/// </summary>
private readonly IServerApplicationPaths AppPaths;
/// <summary>
/// Initializes a new instance of the <see cref="ApiEntryPoint" /> class.
/// </summary>
/// <param name="logger">The logger.</param>
/// <param name="appPaths">The application paths.</param>
public ApiEntryPoint(ILogger logger, IServerApplicationPaths appPaths)
{
Logger = logger;
AppPaths = appPaths;
Instance = this;
}
/// <summary>
/// Runs this instance.
/// </summary>
public void Run()
{
try
{
DeleteEncodedMediaCache();
}
catch (DirectoryNotFoundException)
{
// Don't clutter the log
}
catch (IOException ex)
{
Logger.ErrorException("Error deleting encoded media cache", ex);
}
}
/// <summary>
/// Deletes the encoded media cache.
/// </summary>
private void DeleteEncodedMediaCache()
{
foreach (var file in Directory.EnumerateFiles(AppPaths.EncodedMediaCachePath)
.Where(i => EntityResolutionHelper.VideoFileExtensions.Contains(Path.GetExtension(i)))
.ToList())
{
File.Delete(file);
}
}
/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
/// <summary>
/// Releases unmanaged and - optionally - managed resources.
/// </summary>
/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected virtual void Dispose(bool dispose)
{
var jobCount = _activeTranscodingJobs.Count;
Parallel.ForEach(_activeTranscodingJobs, KillTranscodingJob);
// Try to allow for some time to kill the ffmpeg processes and delete the partial stream files
if (jobCount > 0)
{
Thread.Sleep(1000);
}
}
/// <summary>
/// The active transcoding jobs
/// </summary>
private readonly List<TranscodingJob> _activeTranscodingJobs = new List<TranscodingJob>();
/// <summary>
/// Called when [transcode beginning].
/// </summary>
/// <param name="path">The path.</param>
/// <param name="type">The type.</param>
/// <param name="process">The process.</param>
/// <param name="isVideo">if set to <c>true</c> [is video].</param>
/// <param name="startTimeTicks">The start time ticks.</param>
/// <param name="sourcePath">The source path.</param>
/// <param name="deviceId">The device id.</param>
public void OnTranscodeBeginning(string path, TranscodingJobType type, Process process, bool isVideo, long? startTimeTicks, string sourcePath, string deviceId)
{
lock (_activeTranscodingJobs)
{
_activeTranscodingJobs.Add(new TranscodingJob
{
Type = type,
Path = path,
Process = process,
ActiveRequestCount = 1,
IsVideo = isVideo,
StartTimeTicks = startTimeTicks,
SourcePath = sourcePath,
DeviceId = deviceId
});
}
}
/// <summary>
/// <summary>
/// The progressive
/// </summary>
/// Called when [transcode failed to start].
/// </summary>
/// <param name="path">The path.</param>
/// <param name="type">The type.</param>
public void OnTranscodeFailedToStart(string path, TranscodingJobType type)
{
lock (_activeTranscodingJobs)
{
var job = _activeTranscodingJobs.First(j => j.Type == type && j.Path.Equals(path, StringComparison.OrdinalIgnoreCase));
_activeTranscodingJobs.Remove(job);
}
}
/// <summary>
/// Determines whether [has active transcoding job] [the specified path].
/// </summary>
/// <param name="path">The path.</param>
/// <param name="type">The type.</param>
/// <returns><c>true</c> if [has active transcoding job] [the specified path]; otherwise, <c>false</c>.</returns>
public bool HasActiveTranscodingJob(string path, TranscodingJobType type)
{
lock (_activeTranscodingJobs)
{
return _activeTranscodingJobs.Any(j => j.Type == type && j.Path.Equals(path, StringComparison.OrdinalIgnoreCase));
}
}
/// <summary>
/// Called when [transcode begin request].
/// </summary>
/// <param name="path">The path.</param>
/// <param name="type">The type.</param>
public void OnTranscodeBeginRequest(string path, TranscodingJobType type)
{
lock (_activeTranscodingJobs)
{
var job = _activeTranscodingJobs.FirstOrDefault(j => j.Type == type && j.Path.Equals(path, StringComparison.OrdinalIgnoreCase));
if (job == null)
{
return;
}
job.ActiveRequestCount++;
if (job.KillTimer != null)
{
job.KillTimer.Dispose();
job.KillTimer = null;
}
}
}
/// <summary>
/// Called when [transcode end request].
/// </summary>
/// <param name="path">The path.</param>
/// <param name="type">The type.</param>
public void OnTranscodeEndRequest(string path, TranscodingJobType type)
{
lock (_activeTranscodingJobs)
{
var job = _activeTranscodingJobs.FirstOrDefault(j => j.Type == type && j.Path.Equals(path, StringComparison.OrdinalIgnoreCase));
if (job == null)
{
return;
}
job.ActiveRequestCount--;
if (job.ActiveRequestCount == 0)
{
// The HLS kill timer is long - 1/2 hr. clients should use the manual kill command when stopping.
var timerDuration = type == TranscodingJobType.Progressive ? 1000 : 1800000;
if (job.KillTimer == null)
{
job.KillTimer = new Timer(OnTranscodeKillTimerStopped, job, timerDuration, Timeout.Infinite);
}
else
{
job.KillTimer.Change(timerDuration, Timeout.Infinite);
}
}
}
}
/// <summary>
/// Called when [transcode kill timer stopped].
/// </summary>
/// <param name="state">The state.</param>
private void OnTranscodeKillTimerStopped(object state)
{
var job = (TranscodingJob)state;
KillTranscodingJob(job);
}
/// <summary>
/// Kills the single transcoding job.
/// </summary>
/// <param name="deviceId">The device id.</param>
/// <param name="isVideo">if set to <c>true</c> [is video].</param>
/// <exception cref="System.ArgumentNullException">sourcePath</exception>
internal void KillTranscodingJobs(string deviceId, bool isVideo)
{
if (string.IsNullOrEmpty(deviceId))
{
throw new ArgumentNullException("deviceId");
}
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(i => isVideo == i.IsVideo && string.Equals(deviceId, i.DeviceId, StringComparison.OrdinalIgnoreCase)));
}
foreach (var job in jobs)
{
KillTranscodingJob(job);
}
}
/// <summary>
/// Kills the transcoding job.
/// </summary>
/// <param name="job">The job.</param>
private async void KillTranscodingJob(TranscodingJob job)
{
lock (_activeTranscodingJobs)
{
_activeTranscodingJobs.Remove(job);
if (job.KillTimer != null)
{
job.KillTimer.Dispose();
job.KillTimer = null;
}
}
var process = job.Process;
var hasExited = true;
try
{
hasExited = process.HasExited;
}
catch (Exception ex)
{
Logger.ErrorException("Error determining if ffmpeg process has exited for {0}", ex, job.Path);
}
if (!hasExited)
{
try
{
Logger.Info("Killing ffmpeg process for {0}", job.Path);
process.Kill();
// Need to wait because killing is asynchronous
process.WaitForExit(5000);
}
catch (Win32Exception ex)
{
Logger.ErrorException("Error killing transcoding job for {0}", ex, job.Path);
}
catch (InvalidOperationException ex)
{
Logger.ErrorException("Error killing transcoding job for {0}", ex, job.Path);
}
catch (NotSupportedException ex)
{
Logger.ErrorException("Error killing transcoding job for {0}", ex, job.Path);
}
}
// Determine if it exited successfully
var hasExitedSuccessfully = false;
try
{
hasExitedSuccessfully = process.ExitCode == 0;
}
catch (InvalidOperationException)
{
}
catch (NotSupportedException)
{
}
// Dispose the process
process.Dispose();
// If it didn't complete successfully cleanup the partial files
// Also don't cache output from resume points
// Also don't cache video
if (!hasExitedSuccessfully || job.StartTimeTicks.HasValue || job.IsVideo)
{
Logger.Info("Deleting partial stream file(s) {0}", job.Path);
await Task.Delay(1500).ConfigureAwait(false);
try
{
if (job.Type == TranscodingJobType.Progressive)
{
DeleteProgressivePartialStreamFiles(job.Path);
}
else
{
DeleteHlsPartialStreamFiles(job.Path);
}
}
catch (IOException ex)
{
Logger.ErrorException("Error deleting partial stream file(s) {0}", ex, job.Path);
}
}
}
/// <summary>
/// Deletes the progressive partial stream files.
/// </summary>
/// <param name="outputFilePath">The output file path.</param>
private void DeleteProgressivePartialStreamFiles(string outputFilePath)
{
File.Delete(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 = Directory.EnumerateFiles(directory)
.Where(f => f.IndexOf(name, StringComparison.OrdinalIgnoreCase) != -1)
.ToList();
foreach (var file in filesToDelete)
{
try
{
Logger.Info("Deleting HLS file {0}", file);
File.Delete(file);
}
catch (IOException ex)
{
Logger.ErrorException("Error deleting HLS file {0}", ex, file);
}
}
}
}
/// <summary>
/// Class TranscodingJob
/// </summary>
public class TranscodingJob
{
/// <summary>
/// Gets or sets the path.
/// </summary>
/// <value>The path.</value>
public string Path { get; set; }
/// <summary>
/// Gets or sets the type.
/// </summary>
/// <value>The type.</value>
public TranscodingJobType Type { get; set; }
/// <summary>
/// Gets or sets the process.
/// </summary>
/// <value>The process.</value>
public Process Process { get; set; }
/// <summary>
/// Gets or sets the active request count.
/// </summary>
/// <value>The active request count.</value>
public int ActiveRequestCount { get; set; }
/// <summary>
/// Gets or sets the kill timer.
/// </summary>
/// <value>The kill timer.</value>
public Timer KillTimer { get; set; }
public bool IsVideo { get; set; }
public long? StartTimeTicks { get; set; }
public string SourcePath { get; set; }
public string DeviceId { get; set; }
}
/// <summary>
/// Enum TranscodingJobType
/// </summary>
public enum TranscodingJobType
{
/// <summary>
/// The progressive
/// </summary>
Progressive,
/// <summary>
/// The HLS
/// </summary>
Hls
}
}