243 lines
8.8 KiB
C#
243 lines
8.8 KiB
C#
/*
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* Copyright (c) Contributors, http://opensimulator.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSim Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.IO;
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using OpenSim.Region.Environment.Interfaces;
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namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
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{
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public class LLRAW : ITerrainLoader
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{
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public struct HeightmapLookupValue : IComparable<HeightmapLookupValue>
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{
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public int Index;
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public double Value;
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public HeightmapLookupValue(int index, double value)
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{
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Index = index;
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Value = value;
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}
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public int CompareTo(HeightmapLookupValue val)
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{
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return Value.CompareTo(val.Value);
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}
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}
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/// <summary>Lookup table to speed up terrain exports</summary>
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HeightmapLookupValue[] LookupHeightTable;
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public LLRAW()
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{
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LookupHeightTable = new HeightmapLookupValue[256 * 256];
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for (int i = 0; i < 256; i++)
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{
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for (int j = 0; j < 256; j++)
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{
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LookupHeightTable[i + (j * 256)] = new HeightmapLookupValue(i + (j * 256), ((double)i * ((double)j / 128.0d)));
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}
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}
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Array.Sort<HeightmapLookupValue>(LookupHeightTable);
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}
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#region ITerrainLoader Members
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public ITerrainChannel LoadFile(string filename)
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{
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FileInfo file = new FileInfo(filename);
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FileStream s = file.Open(FileMode.Open, FileAccess.Read);
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ITerrainChannel retval = LoadStream(s);
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s.Close();
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return retval;
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}
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public ITerrainChannel LoadFile(string filename, int offsetX, int offsetY, int fileWidth, int fileHeight, int sectionWidth, int sectionHeight)
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{
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TerrainChannel retval = new TerrainChannel(sectionWidth, sectionHeight);
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FileInfo file = new FileInfo(filename);
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FileStream s = file.Open(FileMode.Open, FileAccess.Read);
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BinaryReader bs = new BinaryReader(s);
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int currFileYOffset = fileHeight - 1;
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// if our region isn't on the first Y section of the areas to be landscaped, then
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// advance to our section of the file
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while (currFileYOffset > offsetY)
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{
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// read a whole strip of regions
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int heightsToRead = sectionHeight * (fileWidth * sectionWidth);
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bs.ReadBytes(heightsToRead * 13); // because there are 13 fun channels
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currFileYOffset--;
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}
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// got to the Y start offset within the file of our region
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// so read the file bits associated with our region
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int y;
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// for each Y within our Y offset
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for (y = sectionHeight - 1; y >= 0; y--)
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{
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int currFileXOffset = 0;
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// if our region isn't the first X section of the areas to be landscaped, then
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// advance the stream to the X start pos of our section in the file
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// i.e. eat X upto where we start
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while (currFileXOffset < offsetX)
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{
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bs.ReadBytes(sectionWidth * 13);
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currFileXOffset++;
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}
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// got to our X offset, so write our regions X line
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int x;
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for (x = 0; x < sectionWidth; x++)
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{
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// Read a strip and continue
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retval[x, y] = bs.ReadByte() * (bs.ReadByte() / 128.0);
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bs.ReadBytes(11);
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}
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// record that we wrote it
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currFileXOffset++;
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// if our region isn't the last X section of the areas to be landscaped, then
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// advance the stream to the end of this Y column
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while (currFileXOffset < fileWidth)
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{
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// eat the next regions x line
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bs.ReadBytes(sectionWidth * 13); //The 13 channels again
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currFileXOffset++;
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}
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}
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bs.Close();
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s.Close();
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return retval;
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}
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public ITerrainChannel LoadStream(Stream s)
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{
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TerrainChannel retval = new TerrainChannel();
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BinaryReader bs = new BinaryReader(s);
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int y;
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for (y = 0; y < retval.Height; y++)
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{
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int x;
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for (x = 0; x < retval.Width; x++)
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{
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retval[x, (retval.Height - 1) - y] = bs.ReadByte() * (bs.ReadByte() / 128.0);
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bs.ReadBytes(11); // Advance the stream to next bytes.
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}
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}
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bs.Close();
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return retval;
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}
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public void SaveFile(string filename, ITerrainChannel map)
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{
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FileInfo file = new FileInfo(filename);
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FileStream s = file.Open(FileMode.CreateNew, FileAccess.Write);
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SaveStream(s, map);
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s.Close();
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}
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public void SaveStream(Stream s, ITerrainChannel map)
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{
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BinaryWriter binStream = new BinaryWriter(s);
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// Output the calculated raw
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for (int y = 0; y < map.Height; y++)
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{
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for (int x = 0; x < map.Width; x++)
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{
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double t = map[x, (map.Height - 1) - y];
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int index = 0;
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// The lookup table is pre-sorted, so we either find an exact match or
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// the next closest (smaller) match with a binary search
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index = Array.BinarySearch<HeightmapLookupValue>(LookupHeightTable, new HeightmapLookupValue(0, t));
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if (index < 0)
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index = ~index - 1;
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index = LookupHeightTable[index].Index;
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byte red = (byte) (index & 0xFF);
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byte green = (byte) ((index >> 8) & 0xFF);
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const byte blue = 20;
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const byte alpha1 = 0;
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const byte alpha2 = 0;
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const byte alpha3 = 0;
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const byte alpha4 = 0;
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const byte alpha5 = 255;
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const byte alpha6 = 255;
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const byte alpha7 = 255;
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const byte alpha8 = 255;
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byte alpha9 = red;
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byte alpha10 = green;
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binStream.Write(red);
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binStream.Write(green);
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binStream.Write(blue);
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binStream.Write(alpha1);
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binStream.Write(alpha2);
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binStream.Write(alpha3);
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binStream.Write(alpha4);
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binStream.Write(alpha5);
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binStream.Write(alpha6);
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binStream.Write(alpha7);
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binStream.Write(alpha8);
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binStream.Write(alpha9);
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binStream.Write(alpha10);
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}
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}
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binStream.Close();
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}
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public string FileExtension
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{
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get { return ".raw"; }
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}
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#endregion
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public override string ToString()
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{
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return "LL/SL RAW";
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}
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}
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}
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