mirror of
https://github.com/crskycode/GARbro.git
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145 lines
5.6 KiB
C#
145 lines
5.6 KiB
C#
//! \file ArcLIN2.cs
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//! \date Sun Oct 23 09:57:27 2016
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//! \brief KaGuYa archive format.
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//
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// Copyright (C) 2016 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.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using GameRes.Utility;
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namespace GameRes.Formats.Kaguya
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{
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[Export(typeof(ArchiveFormat))]
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public class Lin2Opener : ArchiveFormat
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{
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public override string Tag { get { return "ARC/LIN2"; } }
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public override string Description { get { return "KaGuYa script engine resource archive"; } }
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public override uint Signature { get { return 0x324E494C; } } // 'LIN2'
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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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int count = file.View.ReadInt32 (4);
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if (!IsSaneCount (count))
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return null;
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uint index_offset = 8;
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var name_buffer = new byte[0x100];
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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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ushort name_length = file.View.ReadUInt16 (index_offset);
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if (name_length > name_buffer.Length)
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name_buffer = new byte[name_length];
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file.View.Read (index_offset+2, name_buffer, 0, name_length);
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for (int j = 0; j < name_length; ++j)
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name_buffer[j] ^= 0xFF;
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var name = Binary.GetCString (name_buffer, 0, name_length);
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if (string.IsNullOrEmpty (name))
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return null;
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index_offset += 2u + name_length;
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var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
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entry.Offset = file.View.ReadUInt32 (index_offset);
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entry.Size = file.View.ReadUInt32 (index_offset+4);
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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int type = file.View.ReadInt16 (index_offset+8);
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if (1 == type)
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entry.IsPacked = true;
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else if (2 == type)
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entry.Type = "audio";
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dir.Add (entry);
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index_offset += 10;
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}
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return new ArcFile (file, this, 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 pent = entry as PackedEntry;
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if (null == pent || !pent.IsPacked)
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return base.OpenEntry (arc, entry);
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if (0 == pent.UnpackedSize)
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pent.UnpackedSize = arc.File.View.ReadUInt32 (entry.Offset);
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using (var input = arc.File.CreateStream (entry.Offset+4, entry.Size-4))
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{
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var data = UnpackLzss (input, pent.UnpackedSize);
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return new BinMemoryStream (data, entry.Name);
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}
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}
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byte[] UnpackLzss (IBinaryStream input, uint unpacked_size)
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{
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var output = new byte[unpacked_size];
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var frame = new byte[0x100];
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int frame_pos = 0xEF;
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int dst = 0;
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int ctl = 0;
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int bit = 0;
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int prev_count = -1;
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while (dst < output.Length)
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{
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bit >>= 1;
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if (0 == bit)
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{
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ctl = input.ReadByte();
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if (-1 == ctl)
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break;
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bit = 0x80;
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}
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if (0 != (ctl & bit))
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{
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byte v = input.ReadUInt8();
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frame[frame_pos++ & 0xFF] = v;
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output[dst++] = v;
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}
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else
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{
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int offset = input.ReadUInt8();
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int count;
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if (-1 == prev_count)
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{
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prev_count = input.ReadUInt8();
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count = prev_count & 0xF;
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}
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else
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{
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count = prev_count >> 4;
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prev_count = -1;
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}
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count += 2;
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while (count --> 0 && dst < output.Length)
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{
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byte v = frame[offset++ & 0xFF];
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frame[frame_pos++ & 0xFF] = v;
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output[dst++] = v;
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}
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}
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}
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return output;
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}
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}
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}
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