mirror of
https://github.com/crskycode/GARbro.git
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417 lines
14 KiB
C#
417 lines
14 KiB
C#
//! \file AudioWA1.cs
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//! \date Thu Apr 16 11:49:16 2015
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//! \brief FFA System compressed WAV format.
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//
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// Copyright (C) 2015 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Text;
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using GameRes.Compression;
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using GameRes.Utility;
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namespace GameRes.Formats.Ffa
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{
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[Export(typeof(AudioFormat))]
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public class Wa1Audio : AudioFormat
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{
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public override string Tag { get { return "WA1"; } }
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public override string Description { get { return "FFA System wave audio format"; } }
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public override uint Signature { get { return 0; } }
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private static int ReadInt32 (Stream file)
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{
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int dword = file.ReadByte();
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dword |= file.ReadByte() << 8;
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dword |= file.ReadByte() << 16;
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dword |= file.ReadByte() << 24;
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return dword;
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}
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public override SoundInput TryOpen (Stream file)
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{
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int packed = ReadInt32 (file);
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if (packed < 0)
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return null;
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byte[] input;
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if (packed > 9)
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{
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if ((packed + 8) != file.Length)
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return null;
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int unpacked = ReadInt32 (file);
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if (unpacked <= 0)
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return null;
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using (var reader = new LzssReader (file, packed, unpacked))
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{
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reader.Unpack();
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if (Binary.AsciiEqual (reader.Data, 0, "RIFF"))
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{
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var sound = new WaveInput (new MemoryStream (reader.Data));
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file.Dispose();
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return sound;
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}
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input = reader.Data;
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}
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}
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else
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{
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if (0x46464952 != ReadInt32 (file)) // 'RIFF'
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return null;
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file.Position = 0;
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input = new byte[file.Length];
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file.Read (input, 0, input.Length);
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}
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var wa1 = new Wa1Reader (input);
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wa1.Unpack();
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var wav = new WaveInput (new MemoryStream (wa1.Data));
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file.Dispose();
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return wav;
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}
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}
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internal class Wa1Reader
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{
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byte[] m_input;
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byte[] m_output;
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int m_type;
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int m_data_size;
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public int Type { get { return m_type; } }
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public byte[] Data { get { return m_output; } }
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public Wa1Reader (byte[] input)
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{
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m_input = input;
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m_type = LittleEndian.ToInt32 (m_input, 0);
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if (0 != m_type && 4 != m_type && 8 != m_type)
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throw new InvalidFormatException();
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if (!Binary.AsciiEqual (m_input, 4, "RIFF") || !Binary.AsciiEqual (m_input, 0x28, "data"))
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throw new InvalidFormatException();
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m_data_size = LittleEndian.ToInt32 (m_input, 0x2c);
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m_output = new byte[m_data_size+0x2c];
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Buffer.BlockCopy (m_input, 4, m_output, 0, 0x2c);
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LittleEndian.Pack (m_output.Length-8, m_output, 4);
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}
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static ushort[] word_456CA0 = new ushort[] {
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0x39, 0x39, 0x39, 0x39, 0x4D, 0x66, 0x80, 0x99,
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0x39, 0x39, 0x39, 0x39, 0x4D, 0x66, 0x80, 0x99,
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};
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public byte[] Unpack ()
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{
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switch (Type)
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{
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case 0: UnpackV0(); break;
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case 4: UnpackV4(); break;
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case 8: UnpackV8(); break;
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}
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return m_output;
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}
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void UnpackV4 ()
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{
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int src = 0x30;
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int dst = 0x2c;
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uint v72 = 127;
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int v73 = 0;
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int v74 = 0;
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int a5 = 0;
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for (int v71 = m_data_size >> 1; v71 != 0; --v71)
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{
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int v170 = v73;
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int v75 = a5;
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int v76 = (ushort)a5;
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int v77 = v75 >> 16;
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int v81;
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int v78;
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int v79;
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int v80;
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if ((byte)v77 < 8u)
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{
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v78 = m_input[src++];
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v79 = v78 << v77;
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v77 = (v77 + 8) & 0xff;
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v76 |= v79;
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}
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if ((v76 & 3) == 2)
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{
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v80 = v76 >> 2;
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v77 = (v77 - 2) & 0xff;
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v81 = 0;
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}
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else if (0 != (v76 & 3))
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{
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if ((v76 & 7) == 5)
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{
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v80 = v76 >> 3;
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v77 = (v77 - 3) & 0xff;
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v81 = 1;
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}
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else if ( (v76 & 7) == 1 )
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{
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v80 = v76 >> 3;
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v77 = (v77 - 3) & 0xff;
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v81 = 9;
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}
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else if ( (v76 & 0xF) == 11 )
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{
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v80 = v76 >> 4;
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v77 = (v77 - 4) & 0xff;
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v81 = 2;
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}
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else if ((v76 & 0xF) == 3)
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{
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v80 = v76 >> 4;
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v77 = (v77 - 4) & 0xff;
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v81 = 10;
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}
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else if ((v76 & 0x1F) == 23)
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{
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v80 = v76 >> 5;
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v77 = (v77 - 5) & 0xff;
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v81 = 3;
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}
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else if ((v76 & 0x1F) == 7)
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{
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v80 = v76 >> 5;
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v77 = (v77 - 5) & 0xff;
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v81 = 11;
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}
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else if ((v76 & 0x3F) == 47)
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{
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v80 = v76 >> 6;
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v77 = (v77 - 6) & 0xff;
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v81 = 4;
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}
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else if ((v76 & 0x3F) == 15)
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{
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v80 = v76 >> 6;
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v77 = (v77 - 6) & 0xff;
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v81 = 12;
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}
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else if ((v76 & 0x7F) == 95)
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{
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v80 = v76 >> 7;
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v77 = (v77 - 7) & 0xff;
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v81 = 5;
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}
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else if ((v76 & 0x7F) == 31)
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{
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v80 = v76 >> 7;
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v77 = (v77 - 7) & 0xff;
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v81 = 13;
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}
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else
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{
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switch (v76 & 0xff)
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{
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case 0x7F: v81 = 6; break;
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case 0xFF: v81 = 14; break;
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case 0xBF: v81 = 7; break;
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default: v81 = 15; break;
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}
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v80 = v76 >> 8;
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v77 = (v77 - 8) & 0xff;
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}
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}
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else
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{
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v80 = v76 >> 2;
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v77 = (v77 - 2) & 0xff;
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v81 = 8;
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}
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int v82 = (v77 << 16) | v80;
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v73 = v170;
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int v171 = v82;
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v82 = v81;
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int v83 = v81;
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v82 = (2 * (v81 & 7) + 1) & 0xff;
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uint v84 = (v72 * (uint)(ushort)v82) >> 3;
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uint v85 = v84 & 0xffff;
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if (0 != (v83 & 8))
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{
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int dword = v74 << 16 | (v73 & 0xffff);
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dword -= (int)v85;
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v73 = dword & 0xffff;
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v74 = dword >> 16;
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if (v74 < 0 && v73 < 0x8000u)
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{
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v73 = -32768;
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v74 = -1;
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}
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}
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else
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{
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int dword = v74 << 16 | (v73 & 0xffff);
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dword += (int)v85;
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v73 = dword & 0xffff;
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v74 = dword >> 16;
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if (v74 >= 0 && v73 >= 0x8000u)
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{
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v73 = 32767;
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v74 = 0;
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}
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}
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uint v88 = (uint)word_456CA0[v81] * v72;
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v72 = (v88 >> 6) & 0xffff;
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if (v72 < 0x7fu)
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v72 = 0x7f;
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else if (v72 > 0x6000u)
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v72 = 0x6000;
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LittleEndian.Pack ((ushort)v73, m_output, dst);
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dst += 2;
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a5 = v171;
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}
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}
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void UnpackV0 ()
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{
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int src = 0x30;
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int dst = 0x2c;
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uint v12 = 127;
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int v13 = 0;
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int v14 = 0;
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int a5 = 0;
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for (int v11 = m_data_size >> 1; v11 != 0; --v11)
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{
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if ((a5 >> 8) == 1)
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{
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a5 = m_input[src++];
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}
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else
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{
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a5 = 0x100 | (m_input[src] >> 4);
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}
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int v15 = a5 & 0xF;
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int v160 = v15;
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int v16 = v15;
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uint v17 = v12 * (uint)(byte)(2 * (v15 & 7) + 1) >> 3;
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uint v18 = v17 & 0xffff;
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if (0 != (v16 & 8))
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{
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int dword = v14 << 16 | (v13 & 0xffff);
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dword -= (int)v18;
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v13 = dword & 0xffff;
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v14 = dword >> 16;
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if ( v14 < 0 && v13 < 0x8000u )
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{
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v13 = -32768;
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v14 = -1;
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}
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}
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else
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{
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int dword = v14 << 16 | (v13 & 0xffff);
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dword += (int)v18;
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v13 = dword & 0xffff;
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v14 = dword >> 16;
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if ( v14 >= 0 && v13 >= 0x8000u )
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{
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v13 = 32767;
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v14 = 0;
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}
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}
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uint v21 = (uint)word_456CA0[v160] * v12;
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v12 = (v21 >> 6) & 0xffff;
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if (v12 < 0x7Fu)
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v12 = 127;
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else if (v12 > 0x6000u)
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v12 = 0x6000;
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LittleEndian.Pack ((ushort)v13, m_output, dst);
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dst += 2;
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}
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}
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void UnpackV8 ()
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{
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int src = 0x30;
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int dst = 0x2c;
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int v95 = m_data_size >> 2;
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for (int i = 0; i < 2; ++i)
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{
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int a5 = i;
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uint v96 = 127;
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int v97 = 0;
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int v98 = 0;
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int v172 = dst;
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for (int j = 0; j < v95; ++j)
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{
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if (1 == (a5 >> 8))
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{
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a5 = m_input[src++];
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}
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else
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{
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a5 = 0x100 | (m_input[src] >> 4);
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}
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int v99 = a5 & 0xF;
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int v150 = v99;
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int v100 = v99;
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uint v101 = v96 * (uint)(byte)(2 * (v99 & 7) + 1) >> 3;
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uint v102 = v101 & 0xffff;
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if (0 != (v100 & 8))
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{
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int dword = v98 << 16 | (v97 & 0xffff);
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dword -= (int)v102;
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v97 = dword & 0xffff;
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v98 = dword >> 16;
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if ( v98 < 0 && v97 < 0x8000u )
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{
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v97 = -32768;
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v98 = -1;
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}
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}
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else
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{
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int dword = v98 << 16 | (v97 & 0xffff);
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dword += (int)v102;
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v97 = dword & 0xffff;
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v98 = dword >> 16;
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if ( v98 >= 0 && v97 >= 0x8000u )
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{
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v97 = 32767;
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v98 = 0;
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}
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}
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uint v105 = (uint)word_456CA0[v150] * v96;
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v96 = (v105 >> 6) & 0xffff;
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if (v96 < 0x7Fu)
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v96 = 127;
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else if (v96 > 0x6000u)
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v96 = 0x6000;
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LittleEndian.Pack ((ushort)v97, m_output, dst);
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dst += 4;
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}
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dst = v172 + 2;
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}
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}
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}
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}
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