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/* EncodeBase.cs $
This file is part of the HandBrake source code.
Homepage: <http://handbrake.fr>.
It may be used under the terms of the GNU General Public License. */
namespace HandBrake.ApplicationServices.Services.Base
{
using System;
using System.IO;
using System.Text;
using System.Threading;
using HandBrake.ApplicationServices.EventArgs;
using HandBrake.ApplicationServices.Functions;
using HandBrake.ApplicationServices.Model;
using HandBrake.ApplicationServices.Services.Interfaces;
using HandBrake.ApplicationServices.Utilities;
/// <summary>
/// A Base Class for the Encode Services.
/// </summary>
public class EncodeBase
{
#region Private Variables
/// <summary>
/// A Lock for the filewriter
/// </summary>
private static readonly object fileWriterLock = new object();
/// <summary>
/// Windows 7 API Pack wrapper
/// </summary>
private Win7 windowsSeven = new Win7();
/// <summary>
/// The Log Buffer
/// </summary>
private StringBuilder logBuffer;
/// <summary>
/// The Log file writer
/// </summary>
private StreamWriter fileWriter;
/// <summary>
/// The Log File Header
/// </summary>
private StringBuilder header = GeneralUtilities.CreateCliLogHeader(null);
#endregion
/// <summary>
/// Initializes a new instance of the <see cref="EncodeBase"/> class.
/// </summary>
public EncodeBase()
{
this.logBuffer = new StringBuilder();
}
#region Events
/// <summary>
/// Fires when a new CLI QueueTask starts
/// </summary>
public event EventHandler EncodeStarted;
/// <summary>
/// Fires when a CLI QueueTask finishes.
/// </summary>
public event EncodeCompletedStatus EncodeCompleted;
/// <summary>
/// Encode process has progressed
/// </summary>
public event EncodeProgessStatus EncodeStatusChanged;
#endregion
#region Properties
/// <summary>
/// Gets or sets a value indicating whether IsEncoding.
/// </summary>
public bool IsEncoding { get; protected set; }
/// <summary>
/// Gets ActivityLog.
/// </summary>
public string ActivityLog
{
get
{
return string.IsNullOrEmpty(this.logBuffer.ToString()) ? this.header + "No log data available..." : this.header + this.logBuffer.ToString();
}
}
/// <summary>
/// Gets LogBuffer.
/// </summary>
public StringBuilder LogBuffer
{
get
{
return this.logBuffer;
}
}
/// <summary>
/// Gets WindowsSeven.
/// </summary>
public Win7 WindowsSeven
{
get
{
return this.windowsSeven;
}
}
#endregion
#region Invoke Events
/// <summary>
/// Invoke the Encode Status Changed Event.
/// </summary>
/// <param name="e">
/// The EncodeProgressEventArgs.
/// </param>
public void Invoke_encodeStatusChanged(EncodeProgressEventArgs e)
{
EncodeProgessStatus handler = this.EncodeStatusChanged;
if (handler != null)
{
handler(this, e);
}
}
/// <summary>
/// Invoke the Encode Completed Event
/// </summary>
/// <param name="e">
/// The EncodeCompletedEventArgs.
/// </param>
public void Invoke_encodeCompleted(EncodeCompletedEventArgs e)
{
EncodeCompletedStatus handler = this.EncodeCompleted;
if (handler != null)
{
handler(this, e);
}
}
/// <summary>
/// Invoke the Encode Started Event
/// </summary>
/// <param name="e">
/// The EventArgs.
/// </param>
public void Invoke_encodeStarted(EventArgs e)
{
EventHandler handler = this.EncodeStarted;
if (handler != null)
{
handler(this, e);
}
}
#endregion
#region Methods
/// <summary>
/// A Stop Method to be implemeneted.
/// </summary>
/// <param name="exc">
/// The Exception that occured that required a STOP action.
/// </param>
public virtual void Stop(Exception exc)
{
// Do Nothing
}
/// <summary>
/// Save a copy of the log to the users desired location or a default location
/// if this feature is enabled in options.
/// </summary>
/// <param name="destination">
/// The Destination File Path
/// </param>
public void ProcessLogs(string destination)
{
try
{
string logDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) +
"\\HandBrake\\logs";
string tempLogFile = Path.Combine(logDir, string.Format("last_encode_log{0}.txt", GeneralUtilities.GetInstanceCount));
string encodeDestinationPath = Path.GetDirectoryName(destination);
string destinationFile = Path.GetFileName(destination);
string encodeLogFile = destinationFile + " " +
DateTime.Now.ToString().Replace("/", "-").Replace(":", "-") + ".txt";
// Make sure the log directory exists.
if (!Directory.Exists(logDir))
{
Directory.CreateDirectory(logDir);
}
// Copy the Log to HandBrakes log folder in the users applciation data folder.
File.Copy(tempLogFile, Path.Combine(logDir, encodeLogFile));
// Save a copy of the log file in the same location as the enocde.
if (Properties.Settings.Default.SaveLogWithVideo)
{
File.Copy(tempLogFile, Path.Combine(encodeDestinationPath, encodeLogFile));
}
// Save a copy of the log file to a user specified location
if (Directory.Exists(Properties.Settings.Default.SaveLogCopyDirectory) &&
Properties.Settings.Default.SaveLogToCopyDirectory)
{
File.Copy(
tempLogFile, Path.Combine(Properties.Settings.Default.SaveLogCopyDirectory, encodeLogFile));
}
}
catch (Exception)
{
// This exception doesn't warrent user interaction, but it should be logged (TODO)
}
}
/// <summary>
/// Setup the logging.
/// </summary>
/// <param name="encodeQueueTask">
/// The encode QueueTask.
/// </param>
protected void SetupLogging(QueueTask encodeQueueTask)
{
string logDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\HandBrake\\logs";
string logFile = Path.Combine(logDir, string.Format("last_encode_log{0}.txt", GeneralUtilities.GetInstanceCount));
string logFile2 = Path.Combine(logDir, string.Format("tmp_appReadable_log{0}.txt", GeneralUtilities.GetInstanceCount));
try
{
this.logBuffer = new StringBuilder();
// Clear the current Encode Logs
if (File.Exists(logFile))
{
File.Delete(logFile);
}
if (File.Exists(logFile2))
{
File.Delete(logFile2);
}
this.fileWriter = new StreamWriter(logFile) { AutoFlush = true };
this.fileWriter.WriteLine(GeneralUtilities.CreateCliLogHeader(encodeQueueTask));
}
catch (Exception)
{
if (this.fileWriter != null)
{
this.fileWriter.Close();
this.fileWriter.Dispose();
}
throw;
}
}
/// <summary>
/// Process an Incomming Log Message.
/// </summary>
/// <param name="message">
/// The message.
/// </param>
protected void ProcessLogMessage(string message)
{
if (!String.IsNullOrEmpty(message))
{
try
{
lock (this.LogBuffer)
{
this.LogBuffer.AppendLine(message);
}
lock (fileWriterLock)
{
if (this.fileWriter != null && this.fileWriter.BaseStream.CanWrite)
{
this.fileWriter.WriteLine(message);
// If the logging grows past 100MB, kill the encode and stop.
if (this.fileWriter.BaseStream.Length > 100000000)
{
this.Stop(
new Exception(
"The encode has been stopped. The log file has grown to over 100MB which indicates a serious problem has occured with the encode." +
"Please check the encode log for an indication of what the problem is."));
}
}
}
}
catch (Exception exc)
{
// Do Nothing.
}
}
}
/// <summary>
/// Shutdown and Dispose of the File Writer.
/// </summary>
protected void ShutdownFileWriter()
{
try
{
lock (fileWriterLock)
{
if (this.fileWriter != null)
{
this.fileWriter.Close();
this.fileWriter.Dispose();
}
this.fileWriter = null;
}
}
catch (Exception)
{
// This exception doesn't warrent user interaction, but it should be logged (TODO)
}
}
#endregion
}
}
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