mirror of
https://github.com/crskycode/GARbro.git
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343 lines
12 KiB
C#
343 lines
12 KiB
C#
//! \file ImageGBC.cs
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//! \date Mon Oct 03 04:16:11 2016
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//! \brief Primel the Adventure System resource archive.
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//
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// Copyright (C) 2016-2017 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.Windows.Media;
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using GameRes.Utility;
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namespace GameRes.Formats.Primel
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{
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internal class GbcMetaData : ImageMetaData
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{
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public int Flags;
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}
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[Export(typeof(ImageFormat))]
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public class GbcFormat : ImageFormat
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{
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public override string Tag { get { return "GBC"; } }
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public override string Description { get { return "Primel Adventure System image format"; } }
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public override uint Signature { get { return 0x46434247; } } // 'GBCF'
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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var header = stream.ReadHeader (0x14);
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return new GbcMetaData
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{
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Width = header.ToUInt32 (8),
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Height = header.ToUInt32 (0xC),
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BPP = header.ToUInt16 (0x10),
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Flags = header.ToUInt16 (0x12),
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};
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}
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public override ImageData Read (IBinaryStream stream, ImageMetaData info)
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{
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using (var reader = new GbcReader (stream.AsStream, (GbcMetaData)info))
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{
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reader.Unpack();
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return ImageData.Create (info, reader.Format, null, reader.Pixels);
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}
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}
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public override void Write (Stream file, ImageData image)
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{
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throw new System.NotImplementedException ("GbcFormat.Write not implemented");
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}
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}
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internal sealed class GbcReader : IDisposable
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{
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MsbBitStream m_input;
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byte[] m_output;
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GbcMetaData m_info;
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int m_stride;
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public byte[] Pixels { get { return m_output; } }
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public PixelFormat Format { get; private set; }
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public GbcReader (Stream input, GbcMetaData info)
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{
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if (32 == info.BPP)
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Format = PixelFormats.Bgra32;
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else if (24 == info.BPP)
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Format = PixelFormats.Bgr24;
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else if (8 == info.BPP)
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Format = PixelFormats.Gray8;
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else
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throw new InvalidFormatException();
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m_input = new MsbBitStream (input, true);
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m_info = info;
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m_stride = (int)m_info.Width * m_info.BPP / 8;
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m_output = new byte[m_stride * (int)m_info.Height];
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}
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public void Unpack ()
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{
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if (0x800 == (m_info.Flags & 0xFF00))
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UnpackV2();
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else
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UnpackV1();
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}
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void UnpackV1 ()
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{
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m_input.Input.Position = 0x30;
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int pixel_size = m_info.BPP / 8;
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int blocks_w = (int)(m_info.Width + 7) / 8;
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int blocks_h = (int)(m_info.Height + 7) / 8;
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short[,] block = new short[pixel_size, 64];
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for (int by = 0; by < blocks_h; ++by)
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{
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int dst_line = by * 8 * m_stride;
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for (int bx = 0; bx < blocks_w; ++bx)
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{
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int dst_block = dst_line + bx * 8 * pixel_size;
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short last = 0;
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for (int i = 0; i < 64; i++)
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{
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last += (short)GetInt();
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block[0, ZigzagOrder[i]] = last;
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}
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for (int j = 1; j < pixel_size; ++j)
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{
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for (int i = 0; i < 64; ++i)
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block[j, ZigzagOrder[i]] = (short)GetInt();
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RestoreBlock (block, j);
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}
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for (int y = 0; y < 8; ++y)
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{
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if (by + 1 == blocks_h && (by * 8 + y) >= m_info.Height)
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break;
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int src = y * 8;
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int dst = dst_block + y * m_stride;
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for (int x = 0; x < 8; ++x)
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{
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if (bx + 1 == blocks_w && (bx * 8 + x) >= m_info.Width)
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break;
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int p = dst + (x + 1) * pixel_size - 1;
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for (int j = 0; j < pixel_size; ++j)
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{
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m_output[p--] = (byte)(block[j, src] - 128);
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}
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++src;
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}
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}
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}
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}
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}
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void UnpackV2 ()
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{
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m_input.Input.Position = 0x30;
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int pixel_size = m_info.BPP / 8;
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int blocks_w = (int)(m_info.Width + 7) / 8;
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int blocks_h = (int)(m_info.Height + 7) / 8;
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short[,] block = new short[pixel_size, 64];
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for (int by = 0; by < blocks_h; ++by)
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{
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int dst_line = by * 8 * m_stride;
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for (int bx = 0; bx < blocks_w; ++bx)
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{
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int dst_block = dst_line + bx * 8 * pixel_size;
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for (int i = 0; i < pixel_size; ++i)
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{
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for (int j = 0; j < 64; ++j)
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block[i,j] = 0;
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RestoreBlockV2 (block, i);
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}
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for (int y = 0; y < 8; ++y)
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{
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if (by + 1 == blocks_h && (by * 8 + y) >= m_info.Height)
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break;
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int src = y * 8;
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int dst = dst_block + y * m_stride;
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for (int x = 0; x < 8; ++x)
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{
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if (bx + 1 == blocks_w && (bx * 8 + x) >= m_info.Width)
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break;
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if (4 == pixel_size)
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{
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m_output[dst + x * 4 + 2] = (byte)block[0, src+x];
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m_output[dst + x * 4 + 1] = (byte)block[1, src+x];
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m_output[dst + x * 4] = (byte)block[2, src+x];
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m_output[dst + x * 4 + 3] = (byte)block[3, src+x];
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}
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else if (3 == pixel_size)
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{
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m_output[dst + x * 3 + 2] = (byte)block[0, src+x];
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m_output[dst + x * 3 + 1] = (byte)block[1, src+x];
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m_output[dst + x * 3] = (byte)block[2, src+x];
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}
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else
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{
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var val = block[0, src+x];
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m_output[dst + x] = (byte)val;
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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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void RestoreBlock (short[,] block, int n)
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{
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int row = 8;
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for (int col = 1; col < 8; ++col)
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{
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block[n, col] += block[n, col - 1];
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block[n, row] += block[n, row - 8];
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row += 8;
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}
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row = 8;
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for (int y = 1; y < 8; ++y)
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{
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for (int x = 1; x < 8; ++x)
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{
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block[n, row + x] += block[n, row + x - 9];
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}
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row += 8;
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}
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}
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void RestoreBlockV2 (short[,] block, int plane)
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{
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int skip;
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for (int i = 0; i < 64; ++i)
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{
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int n = GetIntV2 (out skip);
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if (n != 0)
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block[plane, ZigzagOrder[i]] = (short)n;
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else if (0 == skip)
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break;
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else
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i += skip - 1;
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}
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for (int row = 0; row < 64; row += 8)
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for (int x = 1; x < 8; ++x)
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{
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block[plane, row+x] += block[plane, row+x-1];
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}
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for (int row = 8; row < 64; row += 8)
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for (int x = 0; x < 8; ++x)
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{
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block[plane, row+x] += block[plane, row-8+x];
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}
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}
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int GetInt ()
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{
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int count = m_input.GetBits (4);
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switch (count)
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{
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case 0: return 0;
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case 1: return 1;
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case 2:
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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return m_input.GetBits (count - 1) + (1 << (count - 1));
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case 8: return -1;
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case 9: return -2;
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default:
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return m_input.GetBits (count - 9) - (2 << (count - 9));
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case -1: throw new EndOfStreamException();
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}
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}
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int GetIntV2 (out int repeat)
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{
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int count = m_input.GetBits (4);
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repeat = 0;
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switch (count)
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{
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case 0:
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repeat = 1;
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while (repeat < 16 && 1 == m_input.GetNextBit())
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++repeat;
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if (16 == repeat)
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repeat = 0;
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return 0;
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case 1: return 1;
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case 2:
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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return m_input.GetBits (count - 1) + (1 << (count - 1));
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case 8: return -1;
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case 9: return -2;
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default:
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return m_input.GetBits (count - 9) - (2 << (count - 9));
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case -1: throw new EndOfStreamException();
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}
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}
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bool _disposed = false;
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public void Dispose ()
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{
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if (!_disposed)
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{
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m_input.Dispose();
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_disposed = true;
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}
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}
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readonly static byte[] ZigzagOrder = {
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0x00, 0x01, 0x08, 0x10, 0x09, 0x02, 0x03, 0x0A,
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0x11, 0x18, 0x20, 0x19, 0x12, 0x0B, 0x04, 0x05,
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0x0C, 0x13, 0x1A, 0x21, 0x28, 0x30, 0x29, 0x22,
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0x1B, 0x14, 0x0D, 0x06, 0x07, 0x0E, 0x15, 0x1C,
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0x23, 0x2A, 0x31, 0x38, 0x39, 0x32, 0x2B, 0x24,
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0x1D, 0x16, 0x0F, 0x17, 0x1E, 0x25, 0x2C, 0x33,
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0x3A, 0x3B, 0x34, 0x2D, 0x26, 0x1F, 0x27, 0x2E,
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0x35, 0x3C, 0x3D, 0x36, 0x2F, 0x37, 0x3E, 0x3F,
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};
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}
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}
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