jellyfin-server/MediaBrowser.Api/ApiEntryPoint.cs
2013-06-10 00:00:44 -04:00

384 lines
12 KiB
C#

using System.IO;
using MediaBrowser.Controller.Plugins;
using MediaBrowser.Model.Logging;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
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>
/// Initializes a new instance of the <see cref="ApiEntryPoint" /> class.
/// </summary>
/// <param name="logger">The logger.</param>
public ApiEntryPoint(ILogger logger)
{
Logger = logger;
Instance = this;
}
/// <summary>
/// Runs this instance.
/// </summary>
public void Run()
{
}
/// <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, OnTranscodeKillTimerStopped);
// 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>
public void OnTranscodeBeginning(string path, TranscodingJobType type, Process process)
{
lock (_activeTranscodingJobs)
{
_activeTranscodingJobs.Add(new TranscodingJob
{
Type = type,
Path = path,
Process = process,
ActiveRequestCount = 1
});
}
}
/// <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)
{
var timerDuration = type == TranscodingJobType.Progressive ? 1000 : 30000;
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 async void OnTranscodeKillTimerStopped(object state)
{
var job = (TranscodingJob)state;
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 (Win32Exception ex)
{
Logger.ErrorException("Error determining if ffmpeg process has exited for {0}", ex, job.Path);
}
catch (InvalidOperationException ex)
{
Logger.ErrorException("Error determining if ffmpeg process has exited for {0}", ex, job.Path);
}
catch (NotSupportedException 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
if (!hasExitedSuccessfully)
{
Logger.Info("Deleting partial stream file(s) {0}", job.Path);
await Task.Delay(1000).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; }
}
/// <summary>
/// Enum TranscodingJobType
/// </summary>
public enum TranscodingJobType
{
/// <summary>
/// The progressive
/// </summary>
Progressive,
/// <summary>
/// The HLS
/// </summary>
Hls
}
}