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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="LibEncode.cs" company="HandBrake Project (http://handbrake.fr)">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// LibHB Implementation of IEncode
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrake.ApplicationServices.Services.Encode
{
using System;
using System.Diagnostics;
using System.Linq;
using HandBrake.ApplicationServices.Model;
using HandBrake.ApplicationServices.Services.Encode.Interfaces;
using HandBrake.ApplicationServices.Services.Scan;
using HandBrake.ApplicationServices.Services.Scan.Model;
using HandBrake.ApplicationServices.Utilities;
using HandBrake.Interop;
using HandBrake.Interop.EventArgs;
using HandBrake.Interop.Interfaces;
using HandBrake.Interop.Model;
/// <summary>
/// LibHB Implementation of IEncode
/// </summary>
public class LibEncode : EncodeBase, IEncode
{
#region Private Variables
/// <summary>
/// Lock for the log file
/// </summary>
private static readonly object LogLock = new object();
/// <summary>
/// The instance.
/// </summary>
private IHandBrakeInstance instance;
/// <summary>
/// The Start time of the current Encode;
/// </summary>
private DateTime startTime;
/// <summary>
/// The Current Task
/// </summary>
private QueueTask currentTask;
/// <summary>
/// A local instance of the scanned source.
/// </summary>
private Source scannedSource;
#endregion
/// <summary>
/// Initializes a new instance of the <see cref="LibEncode"/> class.
/// </summary>
public LibEncode()
{
HandBrakeUtils.MessageLogged += this.HandBrakeInstanceMessageLogged;
HandBrakeUtils.ErrorLogged += this.HandBrakeInstanceErrorLogged;
}
/// <summary>
/// Gets a value indicating whether can pause.
/// </summary>
public bool CanPause
{
get
{
return true;
}
}
/// <summary>
/// Gets a value indicating whether is pasued.
/// </summary>
public bool IsPasued { get; private set; }
/// <summary>
/// Start with a LibHb EncodeJob Object
/// </summary>
/// <param name="job">
/// The job.
/// </param>
public void Start(QueueTask job)
{
// Setup
this.startTime = DateTime.Now;
this.currentTask = job;
// Create a new HandBrake instance
// Setup the HandBrake Instance
this.instance = HandBrakeInstanceManager.GetEncodeInstance(job.Configuration.Verbosity);
this.instance.EncodeCompleted += this.InstanceEncodeCompleted;
this.instance.EncodeProgress += this.InstanceEncodeProgress;
try
{
// Sanity Checking and Setup
if (this.IsEncoding)
{
throw new Exception("HandBrake is already encoding.");
}
this.IsEncoding = true;
// Enable logging if required.
try
{
this.SetupLogging(job, true);
}
catch (Exception)
{
this.IsEncoding = false;
throw;
}
// Verify the Destination Path Exists, and if not, create it.
this.VerifyEncodeDestinationPath(job);
// We have to scan the source again but only the title so the HandBrake instance is initialised correctly.
// Since the UI sends the crop params down, we don't have to do all the previews.
this.instance.ScanCompleted += delegate
{
// Process into internal structures.
this.scannedSource = new Source { Titles = LibScan.ConvertTitles(this.instance.Titles, this.instance.FeatureTitle) }; // TODO work around the bad Internal API.
this.ScanCompleted(job, this.instance);
};
this.instance.StartScan(job.Task.Source, job.Configuration.PreviewScanCount, job.Task.Title);
}
catch (Exception exc)
{
this.InvokeEncodeCompleted(new EventArgs.EncodeCompletedEventArgs(false, exc, "An Error has occured.", this.currentTask.Task.Destination));
}
}
/// <summary>
/// Pause the currently running encode.
/// </summary>
public void Pause()
{
if (this.instance != null)
{
this.instance.PauseEncode();
this.IsPasued = true;
}
}
/// <summary>
/// Resume the currently running encode.
/// </summary>
public void Resume()
{
if (this.instance != null)
{
this.instance.ResumeEncode();
this.IsPasued = false;
}
}
/// <summary>
/// Kill the CLI process
/// </summary>
public override void Stop()
{
try
{
this.IsEncoding = false;
this.instance.StopEncode();
}
catch (Exception)
{
// Do Nothing.
}
}
/// <summary>
/// Shutdown the service.
/// </summary>
public void Shutdown()
{
// Nothing to do for this implementation.
}
/// <summary>
/// The scan completed.
/// </summary>
/// <param name="job">
/// The job.
/// </param>
/// <param name="instance">
/// The instance.
/// </param>
private void ScanCompleted(QueueTask job, IHandBrakeInstance instance)
{
// Get an EncodeJob object for the Interop Library
EncodeJob encodeJob = InteropModelCreator.GetEncodeJob(job);
// Start the Encode
Title title = this.scannedSource.Titles.FirstOrDefault(t => t.TitleNumber == job.Task.Title);
if (title == null)
{
throw new Exception("Unable to get title for encoding. Encode Failed.");
}
Interop.Model.Scan.Title scannedTitle = new Interop.Model.Scan.Title
{
Resolution = new Size(title.Resolution.Width, title.Resolution.Height),
ParVal = new Size(title.ParVal.Width, title.ParVal.Height),
FramerateDenominator = title.FramerateDenominator,
FramerateNumerator = title.FramerateNumerator,
};
// TODO fix this tempory hack to pass in the required title information into the factory.
instance.StartEncode(encodeJob, scannedTitle, job.Configuration.PreviewScanCount);
// Fire the Encode Started Event
this.InvokeEncodeStarted(System.EventArgs.Empty);
// Set the Process Priority
switch (job.Configuration.ProcessPriority)
{
case "Realtime":
Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.RealTime;
break;
case "High":
Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.High;
break;
case "Above Normal":
Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.AboveNormal;
break;
case "Normal":
Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.Normal;
break;
case "Low":
Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.Idle;
break;
default:
Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.BelowNormal;
break;
}
}
#region HandBrakeInstance Event Handlers.
/// <summary>
/// Log a message
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The MessageLoggedEventArgs.
/// </param>
private void HandBrakeInstanceErrorLogged(object sender, MessageLoggedEventArgs e)
{
lock (LogLock)
{
this.ProcessLogMessage(e.Message);
}
}
/// <summary>
/// Log a message
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The MessageLoggedEventArgs.
/// </param>
private void HandBrakeInstanceMessageLogged(object sender, MessageLoggedEventArgs e)
{
lock (LogLock)
{
this.ProcessLogMessage(e.Message);
}
}
/// <summary>
/// Encode Progress Event Handler
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The Interop.EncodeProgressEventArgs.
/// </param>
private void InstanceEncodeProgress(object sender, EncodeProgressEventArgs e)
{
EventArgs.EncodeProgressEventArgs args = new EventArgs.EncodeProgressEventArgs
{
AverageFrameRate = e.AverageFrameRate,
CurrentFrameRate = e.CurrentFrameRate,
EstimatedTimeLeft = e.EstimatedTimeLeft,
PercentComplete = e.FractionComplete * 100,
Task = e.Pass,
ElapsedTime = DateTime.Now - this.startTime,
};
this.InvokeEncodeStatusChanged(args);
}
/// <summary>
/// Encode Completed Event Handler
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private void InstanceEncodeCompleted(object sender, EncodeCompletedEventArgs e)
{
this.IsEncoding = false;
this.InvokeEncodeCompleted(
e.Error
? new EventArgs.EncodeCompletedEventArgs(false, null, string.Empty, this.currentTask.Task.Destination)
: new EventArgs.EncodeCompletedEventArgs(true, null, string.Empty, this.currentTask.Task.Destination));
this.ShutdownFileWriter();
}
#endregion
}
}
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