165 lines
6.0 KiB
C#
165 lines
6.0 KiB
C#
//////////////////////////////////////////////////////////////////////////////////
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// //
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// Copyright © 2005-2020 nzsjb //
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// //
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// This Program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation; either version 2, or (at your option) //
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// any later version. //
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// //
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// This Program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with GNU Make; see the file COPYING. If not, write to //
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// the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. //
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// http://www.gnu.org/copyleft/gpl.html //
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// //
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//////////////////////////////////////////////////////////////////////////////////
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using System;
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using System.Collections.ObjectModel;
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using DomainObjects;
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namespace DVBServices
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{
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/// <summary>
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/// The class that describes a MediaHighway2 Title section.
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/// </summary>
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public class MediaHighway2TitleSection
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{
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/// <summary>
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/// Get the title data for this section.
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/// </summary>
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public Collection<MediaHighway2TitleData> Titles { get { return (titles); } }
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private byte[] unknown;
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private Collection<MediaHighway2TitleData> titles;
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private int lastIndex = -1;
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/// <summary>
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/// Initialize a new instance of the MediaHighway2TitleSection class.
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/// </summary>
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internal MediaHighway2TitleSection()
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{
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titles = new Collection<MediaHighway2TitleData>();
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}
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/// <summary>
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/// Parse the section.
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/// </summary>
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/// <param name="byteData">The MPEG2 section containing the section.</param>
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/// <param name="index">Index of the first byte of the title section in the MPEG2 section.</param>
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/// <returns>True if the section is an MHW2 title section; false otherwise.</returns>
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internal bool Process(byte[] byteData, int index)
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{
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lastIndex = index;
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/*int checkIndex = 18;
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bool process = false;
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while (checkIndex < byteData.Length)
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{
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process = false;
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checkIndex += 7;
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if (checkIndex < byteData.Length)
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{
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checkIndex += 3;
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if (checkIndex < byteData.Length)
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{
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if (byteData[checkIndex] > 0xc0)
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{
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checkIndex += (byteData[checkIndex] - 0xc0);
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checkIndex += 4;
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if (checkIndex < byteData.Length)
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{
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if (byteData[checkIndex] == 0xff)
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{
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checkIndex += 1;
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process = true;
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}
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}
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}
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}
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}
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}
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if (!process)
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return (false);*/
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/*Logger.Instance.Dump("Title Section", byteData, byteData.Length);*/
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unknown = Utils.GetBytes(byteData, lastIndex, 15);
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lastIndex += unknown.Length;
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while (lastIndex < byteData.Length)
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{
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MediaHighway2TitleData title = new MediaHighway2TitleData();
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title.Process(byteData, lastIndex);
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titles.Add(title);
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lastIndex = title.Index;
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}
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return (true);
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}
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/// <summary>
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/// Log the section fields.
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/// </summary>
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public void LogMessage()
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{
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if (Logger.ProtocolLogger == null)
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return;
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if (titles != null)
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{
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Logger.IncrementProtocolIndent();
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foreach (MediaHighway2TitleData title in titles)
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title.LogMessage();
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Logger.DecrementProtocolIndent();
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}
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}
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/// <summary>
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/// Process an MPEG2 section from the MediaHighway title table.
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/// </summary>
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/// <param name="byteData">The MPEG2 section.</param>
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/// <returns>A MediaHighway2TitleSection instance.</returns>
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public static MediaHighway2TitleSection ProcessMediaHighwayTitleTable(byte[] byteData)
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{
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Mpeg2BasicHeader mpeg2Header = new Mpeg2BasicHeader();
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try
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{
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mpeg2Header.Process(byteData);
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MediaHighway2TitleSection titleSection = new MediaHighway2TitleSection();
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bool process = titleSection.Process(byteData, mpeg2Header.Index);
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if (process)
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{
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titleSection.LogMessage();
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return (titleSection);
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}
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else
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return (null);
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}
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catch (ArgumentOutOfRangeException e)
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{
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Logger.Instance.Write("<e> Title section parsing failed: " + e.Message);
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return (null);
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}
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}
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}
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}
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