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/* Scan.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
{
using System;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using HandBrake.ApplicationServices.Functions;
using HandBrake.ApplicationServices.Parsing;
using HandBrake.ApplicationServices.Services.Interfaces;
/// <summary>
/// Scan a Source
/// </summary>
public class ScanService : IScan
{
/* Private Variables */
/// <summary>
/// A Lock object
/// </summary>
private static readonly object locker = new object();
/// <summary>
/// The CLI data parser
/// </summary>
private Parser readData;
/// <summary>
/// The Log Buffer
/// </summary>
private StringBuilder logBuffer;
/// <summary>
/// The line number thats been read to in the log file
/// </summary>
private int logFilePosition;
/// <summary>
/// The Process belonging to the CLI
/// </summary>
private Process hbProc;
/* Event Handlers */
/// <summary>
/// Scan has Started
/// </summary>
public event EventHandler ScanStared;
/// <summary>
/// Scan has completed
/// </summary>
public event EventHandler ScanCompleted;
/// <summary>
/// Scan process has changed to a new title
/// </summary>
public event EventHandler ScanStatusChanged;
/* Properties */
/// <summary>
/// Gets a value indicating whether IsScanning.
/// </summary>
public bool IsScanning { get; private set; }
/// <summary>
/// Gets the Scan Status.
/// </summary>
public string ScanStatus { get; private set; }
/// <summary>
/// Gets the Souce Data.
/// </summary>
public DVD SouceData { get; private set; }
/// <summary>
/// Gets ActivityLog.
/// </summary>
public string ActivityLog
{
get
{
if (IsScanning)
return readData.Buffer.ToString();
if (logBuffer == null)
{
ResetLogReader(false);
ReadLastScanFile();
}
return logBuffer != null ? logBuffer.ToString() : string.Empty;
}
}
/* Public Methods */
/// <summary>
/// Scan a Source Path.
/// Title 0: scan all
/// </summary>
/// <param name="sourcePath">Path to the file to scan</param>
/// <param name="title">int title number. 0 for scan all</param>
public void Scan(string sourcePath, int title)
{
Thread t = new Thread(unused => this.ScanSource(sourcePath, title));
t.Start();
}
/// <summary>
/// Kill the scan
/// </summary>
public void Stop()
{
try
{
if (hbProc != null)
hbProc.Kill();
}
catch (Exception ex)
{
Main.ShowExceptiowWindow("Unable to kill HandBrakeCLI.exe \n" +
"You may need to manually kill HandBrakeCLI.exe using the Windows Task Manager if it does not close automatically" +
" within the next few minutes. ", ex.ToString());
}
}
/* Private Methods */
/// <summary>
/// Start a scan for a given source path and title
/// </summary>
/// <param name="sourcePath">Path to the source file</param>
/// <param name="title">the title number to look at</param>
private void ScanSource(object sourcePath, int title)
{
try
{
IsScanning = true;
if (this.ScanStared != null)
this.ScanStared(this, new EventArgs());
ResetLogReader(true);
string handbrakeCLIPath = Path.Combine(Application.StartupPath, "HandBrakeCLI.exe");
string logDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) +
"\\HandBrake\\logs";
string dvdInfoPath = Path.Combine(logDir, string.Format("last_scan_log{0}.txt", Init.InstanceId == 0 ? string.Empty : Init.InstanceId.ToString()));
// Make we don't pick up a stale last_encode_log.txt (and that we have rights to the file)
if (File.Exists(dvdInfoPath))
File.Delete(dvdInfoPath);
string extraArguments = string.Empty;
if (Init.DisableDvdNav)
extraArguments = " --no-dvdnav";
if (title > 0)
extraArguments += " --scan ";
this.hbProc = new Process
{
StartInfo =
{
FileName = handbrakeCLIPath,
Arguments =
String.Format(@" -i ""{0}"" -t{1} {2} -v ", sourcePath, title,
extraArguments),
RedirectStandardOutput = true,
RedirectStandardError = true,
UseShellExecute = false,
CreateNoWindow = true
}
};
// Start the Scan
this.hbProc.Start();
this.readData = new Parser(this.hbProc.StandardError.BaseStream);
this.readData.OnScanProgress += new ScanProgressEventHandler(this.OnScanProgress);
this.SouceData = DVD.Parse(this.readData);
// Write the Buffer out to file.
StreamWriter scanLog = new StreamWriter(dvdInfoPath);
scanLog.WriteLine(Logging.CreateCliLogHeader(null));
scanLog.Write(this.readData.Buffer);
scanLog.Flush();
scanLog.Close();
logBuffer.AppendLine(this.readData.Buffer.ToString());
IsScanning = false;
if (this.ScanCompleted != null)
this.ScanCompleted(this, new EventArgs());
}
catch (Exception exc)
{
Main.ShowExceptiowWindow("frmMain.cs - scanProcess() Error", exc.ToString());
}
}
/// <summary>
/// Read the log file
/// </summary>
private void ReadLastScanFile()
{
lock (locker)
{
// last_encode_log.txt is the primary log file. Since .NET can't read this file whilst the CLI is outputing to it (Not even in read only mode),
// we'll need to make a copy of it.
string logDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) +
"\\HandBrake\\logs";
string logFile = Path.Combine(logDir, string.Format("last_scan_log{0}.txt", Init.InstanceId == 0 ? string.Empty : Init.InstanceId.ToString()));
string logFile2 = Path.Combine(logDir, string.Format("tmp_appReadable_log{0}.txt", Init.InstanceId == 0 ? string.Empty : Init.InstanceId.ToString()));
try
{
// Make sure the application readable log file does not already exist. FileCopy fill fail if it does.
if (File.Exists(logFile2))
File.Delete(logFile2);
// Copy the log file.
if (File.Exists(logFile))
File.Copy(logFile, logFile2, true);
else
{
ResetLogReader(true);
return;
}
// Start the Reader
// Only use text which continues on from the last read line
StreamReader sr = new StreamReader(logFile2);
string line;
int i = 1;
while ((line = sr.ReadLine()) != null)
{
if (i > logFilePosition)
{
logBuffer.AppendLine(line);
logFilePosition++;
}
i++;
}
sr.Close();
sr.Dispose();
}
catch (Exception exc)
{
Console.WriteLine(exc.ToString());
ResetLogReader(true);
}
}
}
/// <summary>
/// Reset the Log Reader
/// </summary>
/// <param name="addHeader">
/// The add Header.
/// </param>
private void ResetLogReader(bool addHeader)
{
logFilePosition = 0;
logBuffer = new StringBuilder();
if (addHeader)
logBuffer.AppendLine(Logging.CreateCliLogHeader(null));
}
/// <summary>
/// Fire an event when the scan process progresses
/// </summary>
/// <param name="sender">the sender</param>
/// <param name="currentTitle">the current title being scanned</param>
/// <param name="titleCount">the total number of titles</param>
private void OnScanProgress(object sender, int currentTitle, int titleCount)
{
this.ScanStatus = string.Format("Processing Title: {0} of {1}", currentTitle, titleCount);
if (this.ScanStatusChanged != null)
this.ScanStatusChanged(this, new EventArgs());
}
}
}
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