223 lines
8.3 KiB
C#
223 lines
8.3 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 DomainObjects;
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namespace DVBServices
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{
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/// <summary>
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/// The class that describes MediaHighway2 title data.
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/// </summary>
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public class MediaHighway2TitleData
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{
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/// <summary>
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/// Get the channel identification.
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/// </summary>
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public int ChannelID { get { return (channelID); } }
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/// <summary>
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/// Get the event identification.
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/// </summary>
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public int EventID { get { return (eventID); } }
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/// <summary>
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/// Get the start time of the event.
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/// </summary>
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public DateTime StartTime { get { return (baseDate + new TimeSpan(hours, minutes, 0)); }}
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/// <summary>
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/// Get the duration of the event.
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/// </summary>
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public TimeSpan Duration { get { return (duration); } }
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/// <summary>
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/// Get the theme identification of the event.
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/// </summary>
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public int CategoryID { get { return ((mainCategory << 6) + subCategory); } }
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/// <summary>
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/// Get the theme group of the event.
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/// </summary>
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public int MainCategory { get { return (mainCategory); } }
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/// <summary>
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/// Get the theme subgroup of the event.
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/// </summary>
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public int SubCategory { get { return (subCategory); } }
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/// <summary>
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/// Get the name of the event.
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/// </summary>
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public string EventName { get { return (eventName); } }
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/// <summary>
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/// Get the unknown data.
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/// </summary>
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public byte[] Unknown
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{
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get
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{
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byte[] outputBytes = new byte[unknown0.Length + unknown1.Length + unknown2.Length];
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unknown0.CopyTo(outputBytes, 0);
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unknown1.CopyTo(outputBytes, unknown0.Length);
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unknown2.CopyTo(outputBytes, unknown0.Length + unknown1.Length);
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return (outputBytes);
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}
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}
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/// <summary>
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/// Get the index of the next byte in the MPEG2 section following the title data.
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/// </summary>
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/// <exception cref="InvalidOperationException">
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/// The title data has not been processed.
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/// </exception>
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public int Index
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{
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get
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{
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if (lastIndex == -1)
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throw (new InvalidOperationException("MediaHighway2TitleData: Index requested before block processed"));
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return (lastIndex);
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}
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}
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private byte[] unknown0;
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private int channelID;
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private byte[] unknown1;
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private int mainCategory;
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private DateTime baseDate;
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private int hours;
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private int minutes;
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private byte[] unknown2;
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private TimeSpan duration;
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private string eventName;
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private int subCategory;
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private int eventID;
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private int lastIndex = -1;
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/// <summary>
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/// Initialize a new instance of the MediaHighway2TitleData class.
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/// </summary>
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public MediaHighway2TitleData() { }
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/// <summary>
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/// Parse the title data.
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/// </summary>
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/// <param name="byteData">The MPEG2 section containing the title data.</param>
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/// <param name="index">Index of the first byte of the title data in the MPEG2 section.</param>
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internal void Process(byte[] byteData, int index)
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{
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lastIndex = index;
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try
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{
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unknown0 = Utils.GetBytes(byteData, 3, 15);
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channelID = (int)byteData[lastIndex];
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lastIndex++;
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unknown1 = Utils.GetBytes(byteData, lastIndex, 10);
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lastIndex += unknown1.Length;
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mainCategory = byteData[7] & 0x0f;
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baseDate = getDate(Utils.Convert2BytesToInt(byteData, lastIndex));
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lastIndex += 2;
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hours = ((byteData[lastIndex] >> 4) * 10) + (byteData[lastIndex] & 0x0f);
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lastIndex++;
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minutes = ((byteData[lastIndex] >> 4) * 10) + (byteData[lastIndex] & 0x0f);
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lastIndex++;
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unknown2 = Utils.GetBytes(byteData, lastIndex, 1);
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lastIndex += unknown2.Length;
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int durationMinutes = (byteData[lastIndex] << 4) + (byteData[lastIndex + 1] >> 4);
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duration = new TimeSpan(durationMinutes / 60, durationMinutes % 60, 0);
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lastIndex += 2;
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int eventNameLength = byteData[lastIndex] & 0x3f;
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lastIndex++;
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eventName = Utils.GetString(byteData, lastIndex, eventNameLength, ReplaceMode.TransferUnchanged);
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lastIndex += eventNameLength;
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subCategory = byteData[lastIndex] & 0x3f;
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lastIndex++;
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eventID = Utils.Convert2BytesToInt(byteData, lastIndex);
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lastIndex += 2;
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Validate();
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}
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catch (IndexOutOfRangeException)
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{
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throw (new ArgumentOutOfRangeException("lastIndex = " + lastIndex));
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}
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}
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private DateTime getDate(int mjd)
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{
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int j = mjd + 2400001 + 68569;
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int c = 4 * j / 146097;
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j = j - (146097 * c + 3) / 4;
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int y = 4000 * (j + 1) / 1461001;
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j = j - 1461 * y / 4 + 31;
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int m = 80 * j / 2447;
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int day = j - 2447 * m / 80;
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j = m / 11;
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int month = m + 2 - (12 * j);
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int year = 100 * (c - 49) + y + j;
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return (new DateTime(year, month, day));
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}
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/// <summary>
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/// Validate the title data fields.
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/// </summary>
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/// <exception cref="ArgumentOutOfRangeException">
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/// A title data field is not valid.
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/// </exception>
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public void Validate() { }
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/// <summary>
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/// Log the title data 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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Logger.ProtocolLogger.Write(Logger.ProtocolIndent + "MHW2 TITLE DATA: Channel ID: " + channelID +
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" Unknown0: " + Utils.ConvertToHex(unknown0) +
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" Unknown1: " + Utils.ConvertToHex(unknown1) +
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" Main cat: " + mainCategory +
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" Base date: " + baseDate +
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" Hours: " + hours +
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" Minutes: " + minutes +
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" Unknown2: " + Utils.ConvertToHex(unknown2) +
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" Duration: " + duration +
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" Event name: " + eventName +
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" Sub cat: " + mainCategory +
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" Event ID: " + eventID);
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}
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}
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}
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