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/* Parser.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.Parsing
{
using System;
using System.Globalization;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
/// <summary>
/// A delegate to handle custom events regarding data being parsed from the buffer
/// </summary>
/// <param name="sender">The object which raised this delegate</param>
/// <param name="data">The data parsed from the stream</param>
public delegate void DataReadEventHandler(object sender, string data);
/// <summary>
/// A delegate to handle events regarding progress during DVD scanning
/// </summary>
/// <param name="sender">The object who's raising the event</param>
/// <param name="currentTitle">The title number currently being processed</param>
/// <param name="titleCount">The total number of titiles to be processed</param>
public delegate void ScanProgressEventHandler(object sender, int currentTitle, int titleCount);
/// <summary>
/// A delegate to handle encode progress updates // EXPERIMENTAL
/// </summary>
/// <param name="sender">The object which raised the event</param>
/// <param name="currentTask">The current task being processed from the queue</param>
/// <param name="taskCount">The total number of tasks in queue</param>
/// <param name="percentComplete">The percentage this task is complete</param>
/// <param name="currentFps">The current encoding fps</param>
/// <param name="averageFps">The average encoding fps for this task</param>
/// <param name="timeRemaining">The estimated time remaining for this task to complete</param>
public delegate void EncodeProgressEventHandler(object sender, int currentTask, int taskCount, float percentComplete, float currentFps, float averageFps, TimeSpan timeRemaining);
/// <summary>
/// A simple wrapper around a StreamReader to keep track of the entire output from a cli process
/// </summary>
public class Parser : StreamReader
{
/// <summary>
/// The Buffer StringBuilder
/// </summary>
private readonly StringBuilder buffer = new StringBuilder(string.Empty);
/// <summary>
/// Initializes a new instance of the <see cref="Parser"/> class.
/// Default constructor for this object
/// </summary>
/// <param name="baseStream">
/// The stream to parse from
/// </param>
public Parser(Stream baseStream) : base(baseStream)
{
}
/// <summary>
/// Raised upon a new line being read from stdout/stderr
/// </summary>
public event DataReadEventHandler OnReadLine;
/// <summary>
/// Raised upon the entire stdout/stderr stream being read in a single call
/// </summary>
public event DataReadEventHandler OnReadToEnd;
/// <summary>
/// Raised upon the catching of a "Scanning title # of #..." in the stream
/// </summary>
public event ScanProgressEventHandler OnScanProgress;
/// <summary>
/// Raised upon the catching of a "Scanning title # of #..." in the stream
/// </summary>
public event EncodeProgressEventHandler OnEncodeProgress;
/// <summary>
/// Gets the buffer of data that came from the CLI standard input/error
/// </summary>
public StringBuilder Buffer
{
get { return buffer; }
}
/// <summary>
/// Read a line from standard in/err
/// </summary>
/// <returns>
/// The read line
/// </returns>
public override string ReadLine()
{
string tmp = base.ReadLine();
buffer.Append(tmp + Environment.NewLine);
Match m = null;
if (tmp.Contains("Scanning title"))
m = Regex.Match(tmp, "^Scanning title ([0-9]*) of ([0-9]*)");
if (OnReadLine != null)
OnReadLine(this, tmp);
if (m != null)
if (m.Success && OnScanProgress != null)
OnScanProgress(this, int.Parse(m.Groups[1].Value), int.Parse(m.Groups[2].Value));
return tmp;
}
/// <summary>
/// Read to the end of the input stream
/// </summary>
/// <returns>
/// A string of the input data
/// </returns>
public override string ReadToEnd()
{
string tmp = base.ReadToEnd();
buffer.Append(tmp + Environment.NewLine);
if (OnReadToEnd != null)
OnReadToEnd(this, tmp);
return tmp;
}
/// <summary>
/// Pase the CLI status output (from standard output)
/// </summary>
public void ReadEncodeStatus()
{
CultureInfo culture = CultureInfo.CreateSpecificCulture("en-US");
string tmp = base.ReadLine();
Match m = Regex.Match(tmp, @"^Encoding: task ([0-9]*) of ([0-9]*), ([0-9]*\.[0-9]*) %( \(([0-9]*\.[0-9]*) fps, avg ([0-9]*\.[0-9]*) fps, ETA ([0-9]{2})h([0-9]{2})m([0-9]{2})s\))?");
if (m.Success && OnEncodeProgress != null)
{
int currentTask = int.Parse(m.Groups[1].Value);
int totalTasks = int.Parse(m.Groups[2].Value);
float percent = float.Parse(m.Groups[3].Value, culture);
float currentFps = m.Groups[5].Value == string.Empty ? 0.0F : float.Parse(m.Groups[5].Value, culture);
float avgFps = m.Groups[6].Value == string.Empty ? 0.0F : float.Parse(m.Groups[6].Value, culture);
TimeSpan remaining = TimeSpan.Zero;
if (m.Groups[7].Value != string.Empty)
{
remaining = TimeSpan.Parse(m.Groups[7].Value + ":" + m.Groups[8].Value + ":" + m.Groups[9].Value);
}
OnEncodeProgress(this, currentTask, totalTasks, percent, currentFps, avgFps, remaining);
}
}
}
}
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