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317 lines
13 KiB
C#
317 lines
13 KiB
C#
//! \file ArcDAT.cs
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//! \date 2018 Feb 06
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//! \brief Discovery resource archive.
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//
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// Copyright (C) 2018 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.Collections.Generic;
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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 System.Windows.Media.Imaging;
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using GameRes.Compression;
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// [000225][Discovery] Tsukiyo no Hitomi wa Kurenai ni
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// [001102][Discovery] Twins Rhapsody
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namespace GameRes.Formats.Discovery
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{
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internal class BDataEntry : PackedEntry
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{
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public uint Width;
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public uint Height;
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public int BPP;
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public int Colors;
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public int Extra;
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}
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internal class EDataEntry : PackedEntry
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{
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public uint HeaderSize;
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public uint HeaderUnpacked;
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public uint BodyOffset;
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public uint BodySize;
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public uint BodyUnpacked;
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}
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[Export(typeof(ArchiveFormat))]
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public class DatOpener : ArchiveFormat
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{
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public override string Tag { get { return "DAT/DISCOVERY"; } }
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public override string Description { get { return "Discovery resource archive"; } }
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public override uint Signature { get { return 0; } }
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public override bool IsHierarchic { get { return false; } }
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public override bool CanWrite { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.Name.HasExtension (".dat"))
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return null;
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int count = file.View.ReadInt32 (file.MaxOffset-4);
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if (!IsSaneCount (count))
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return null;
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var arc_name = Path.GetFileName (file.Name);
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List<Entry> dir = null;
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if (arc_name.StartsWith ("BData", StringComparison.OrdinalIgnoreCase))
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dir = ReadBDataIndex (file, count);
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else if (arc_name.StartsWith ("EData", StringComparison.OrdinalIgnoreCase))
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dir = ReadEDataIndex (file, count);
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else if (arc_name.StartsWith ("VData", StringComparison.OrdinalIgnoreCase))
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dir = ReadVDataIndex (file, count);
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if (null == dir)
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return null;
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return new ArcFile (file, this, dir);
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}
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List<Entry> ReadBDataIndex (ArcView file, int count)
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{
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int entry_size = 0x3C;
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int index_size = count * entry_size;
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if (index_size+4 >= file.MaxOffset)
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return null;
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var index = file.View.ReadBytes (file.MaxOffset - 4 - index_size, (uint)index_size);
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int index_offset = 0;
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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Decrypt (index, index_offset, entry_size);
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int name_length = index[index_offset];
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if (0 == name_length || name_length > entry_size - 0x18)
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return null;
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var name = Encodings.cp932.GetString (index, index_offset+0x18, name_length);
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var entry = FormatCatalog.Instance.Create<BDataEntry> (name);
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entry.Size = index.ToUInt32 (index_offset+4);
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entry.UnpackedSize = index.ToUInt32 (index_offset+8);
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entry.Offset = index.ToUInt32 (index_offset+0xC);
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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entry.Width = index.ToUInt32 (index_offset+0x10);
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entry.Height = index.ToUInt32 (index_offset+0x14);
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entry.BPP = index[index_offset+1];
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entry.Extra = index.ToUInt16 (index_offset+0x28);
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entry.Colors = index.ToUInt16 (index_offset+0x2A);
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dir.Add (entry);
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index_offset += entry_size;
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}
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return dir;
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}
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List<Entry> ReadEDataIndex (ArcView file, int count)
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{
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int entry_size = 0x2C;
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int index_size = count * entry_size;
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if (index_size+4 >= file.MaxOffset)
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return null;
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var index = file.View.ReadBytes (file.MaxOffset - 4 - index_size, (uint)index_size);
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int index_offset = 0;
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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Decrypt (index, index_offset, entry_size);
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int name_length = index[index_offset];
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if (0 == name_length || name_length > entry_size - 0x1C)
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return null;
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var name = Encodings.cp932.GetString (index, index_offset+0x1C, name_length);
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var entry = FormatCatalog.Instance.Create<EDataEntry> (name);
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entry.BodySize = index.ToUInt32 (index_offset+4);
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entry.BodyUnpacked = index.ToUInt32 (index_offset+8);
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entry.BodyOffset = index.ToUInt32 (index_offset+0xC);
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entry.HeaderSize = index.ToUInt32 (index_offset+0x10);
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entry.HeaderUnpacked = index.ToUInt32 (index_offset+0x14);
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entry.Offset = index.ToUInt32 (index_offset+0x18);
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entry.Size = entry.HeaderSize + entry.BodySize;
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entry.UnpackedSize = entry.HeaderUnpacked + entry.BodyUnpacked;
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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entry.IsPacked = true;
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dir.Add (entry);
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index_offset += entry_size;
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}
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return dir;
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}
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List<Entry> ReadVDataIndex (ArcView file, int count)
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{
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int entry_size = 0x20;
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int index_size = count * entry_size;
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if (index_size+4 >= file.MaxOffset)
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return null;
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var index = file.View.ReadBytes (file.MaxOffset - 4 - index_size, (uint)index_size);
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for (int i = 0; i < index.Length; ++i)
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index[i] ^= 0xDE;
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int index_offset = 0;
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var dir = new List<Entry> (count);
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for (int i = 0; i < count; ++i)
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{
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int name_length = index[index_offset];
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if (0 == name_length || name_length > entry_size - 0x10)
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return null;
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var name = Encodings.cp932.GetString (index, index_offset+0x10, name_length);
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Size = index.ToUInt32 (index_offset+8);
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entry.Offset = index.ToUInt32 (index_offset+0xC);
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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index_offset += entry_size;
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}
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return dir;
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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var eent = entry as EDataEntry;
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if (null == eent || !eent.IsPacked)
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return base.OpenEntry (arc, entry);
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var header = new byte[eent.HeaderUnpacked];
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using (var input = arc.File.CreateStream (eent.Offset, eent.HeaderSize))
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using (var lzss = new LzssStream (input))
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lzss.Read (header, 0, header.Length);
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Stream body = arc.File.CreateStream (eent.BodyOffset, eent.BodySize);
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body = new LzssStream (body);
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return new PrefixStream (header, body);
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}
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public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
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{
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var bent = entry as BDataEntry;
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if (null == bent)
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return base.OpenImage (arc, entry);
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return new BDataDecoder (arc, bent);
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}
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void Decrypt (byte[] data, int pos, int length)
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{
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Descramble32 (data, pos, length, 13);
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Descramble8 (data, pos, length, 7);
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for (int i = 0; i < length; ++i)
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data[pos+i] ^= 0xD6;
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}
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unsafe void Descramble32 (byte[] data, int pos, int length, int seed)
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{
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length /= 4;
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fixed (byte* data8 = &data[pos])
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{
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uint* data32 = (uint*)data8;
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for (int i = 0; i < length; ++i)
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{
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int s = 0;
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uint x = ~(data32[i] & 1) & data32[i];
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int shift = 0;
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for (int j = 0; j < 31; ++j)
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{
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shift = s - seed;
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if (shift < 0)
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shift += ((31 - shift) >> 5) << 5;
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uint bit = x & (1u << shift);
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uint a = ~bit & x;
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uint b;
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if (shift <= s)
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b = bit << (s - shift);
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else
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b = bit >> (shift - s);
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x = b | a;
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s = shift;
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}
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data32[i] = x | ((data32[i] & 1) << shift);
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}
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}
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}
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void Descramble8 (byte[] data, int pos, int length, int seed)
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{
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byte first = data[pos];
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int x = 0;
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int i = 0;
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for (int count = length - 1; count > 0; --count)
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{
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i = x - seed;
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while (i < 0)
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i += length;
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data[pos+x] = data[pos+i];
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x = i;
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}
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data[pos+i] = first;
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}
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}
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internal sealed class BDataDecoder : IImageDecoder
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{
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IBinaryStream m_input;
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byte[] m_output;
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ImageData m_image;
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int m_colors;
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int m_extra;
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public Stream Source { get { m_input.Position = 0; return m_input.AsStream; } }
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public ImageFormat SourceFormat { get { return null; } }
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public ImageMetaData Info { get; private set; }
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public PixelFormat Format { get; private set; }
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public int Stride { get; private set; }
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public BitmapPalette Palette { get; private set; }
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public ImageData Image { get { return m_image ?? (m_image = Unpack()); } }
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public BDataDecoder (ArcFile arc, BDataEntry entry)
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{
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Info = new ImageMetaData { Width = entry.Width, Height = entry.Height, BPP = entry.BPP };
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uint total_size = entry.Size;
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total_size += (uint)entry.Colors * 4;
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if (entry.Extra > 0)
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total_size += 10 * (uint)entry.Extra + 2;
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Stride = ((int)entry.Width * entry.BPP / 8 + 3) & ~3;
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if (8 == entry.BPP)
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Format = PixelFormats.Indexed8;
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else
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Format = PixelFormats.Bgr24;
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m_output = new byte[Stride * (int)entry.Height];
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m_colors = entry.Colors;
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m_extra = entry.Extra;
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m_input = arc.File.CreateStream (entry.Offset, total_size);
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}
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private ImageData Unpack ()
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{
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m_input.Position = 0;
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if (m_colors > 0)
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Palette = ImageFormat.ReadPalette (m_input.AsStream, m_colors);
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if (m_extra > 0)
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m_input.Seek (10 * m_extra + 2, SeekOrigin.Current);
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using (var lzss = new LzssStream (m_input.AsStream, LzssMode.Decompress, true))
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lzss.Read (m_output, 0, m_output.Length);
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return ImageData.CreateFlipped (Info, Format, Palette, m_output, Stride);
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}
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bool m_disposed = false;
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public void Dispose ()
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{
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if (!m_disposed)
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{
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m_input.Dispose();
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m_disposed = true;
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}
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}
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}
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}
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