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implemented MD002 archives.

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morkt 2018-02-02 03:45:40 +04:00
parent fd50e66837
commit 992661a651
1 changed files with 166 additions and 0 deletions
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ArcFormats/AdvScripter/ArcPAK.cs Normal file
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//! \file ArcPAK.cs
//! \date 2018 Jan 31
//! \brief ADVScripter resource archive.
//
// Copyright (C) 2018 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using GameRes.Compression;
using GameRes.Utility;
namespace GameRes.Formats.AdvScripter
{
internal class MdArchive : ArcFile
{
public readonly int Version;
public MdArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, int version)
: base (arc, impl, dir)
{
Version = version;
}
}
[Export(typeof(ArchiveFormat))]
public class PakOpener : ArchiveFormat
{
public override string Tag { get { return "PAK/MD002"; } }
public override string Description { get { return "ADVScripter engine resource archive"; } }
public override uint Signature { get { return 0x3030444D; } } // 'MD002'
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if (file.View.ReadByte (4) != '2' || !file.View.AsciiEqual (0x21, "00V"))
return null;
int count = file.View.ReadInt32 (0x24);
if (!IsSaneCount (count))
return null;
int version = file.View.ReadByte (0x20) - '0';
if (version < 1 || version > 9)
return null;
var index_entry = new IndexReader (file, version);
var buffer = new byte[0x30];
uint index_offset = 0x28;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
file.View.Read (index_offset, buffer, 0, 0x30);
index_entry.Decrypt (buffer);
var name = Binary.GetCString (buffer, 0, 0x20);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = index_entry.Offset;
entry.UnpackedSize = index_entry.UnpackedSize;
entry.Size = index_entry.PackedSize;
entry.IsPacked = buffer.ToInt32 (0x20) != 0;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += 0x30;
}
return new MdArchive (file, this, dir, version);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var mdarc = arc as MdArchive;
Stream input = arc.File.CreateStream (entry.Offset, entry.Size);
if (mdarc != null && (mdarc.Version >= 5 && mdarc.Version <= 8))
input = new XoredStream (input, 0xFF);
var pent = entry as PackedEntry;
if (pent != null && pent.IsPacked)
input = new LzssStream (input);
return input;
}
internal class IndexReader
{
public uint Offset;
public uint PackedSize;
public uint UnpackedSize;
public readonly Action<byte[]> Decrypt;
private uint m_key;
public IndexReader (ArcView file, int version)
{
if (1 == version || 5 == version)
{
Decrypt = buffer => {
Offset = buffer.ToUInt32 (0x24);
UnpackedSize = buffer.ToUInt32 (0x28);
PackedSize = buffer.ToUInt32 (0x2C);
};
return;
}
else if (2 == version || 6 == version)
m_key = uint.MaxValue;
else
m_key = file.View.ReadUInt32 (0x1C);
Action<byte[]> read = buffer => {
Offset = buffer.ToUInt32 (0x24) ^ m_key;
UnpackedSize = buffer.ToUInt32 (0x28) ^ m_key;
PackedSize = buffer.ToUInt32 (0x2C) ^ m_key;
};
Action transform;
if (9 == version)
{
transform = () => {
Offset = (Offset & 0xFFFF) << 15 | Offset >> 17;
UnpackedSize = (UnpackedSize & 0xFFFF) << 14 | UnpackedSize >> 18;
PackedSize = (PackedSize & 0xFFFF) << 13 | PackedSize >> 19;
};
}
else
{
transform = () => {
Offset >>= 1;
UnpackedSize >>= 2;
PackedSize >>= 3;
};
}
Action<byte[]> decrypt_name = buffer => { };
if (9 == version || 4 == version || 8 == version)
{
var key_bytes = new byte[4];
LittleEndian.Pack (m_key, key_bytes, 0);
decrypt_name = buffer => {
for (int i = 0; i < 28; ++i)
buffer[i] ^= key_bytes[i & 3];
};
}
Decrypt = buffer => {
read (buffer);
transform ();
decrypt_name (buffer);
};
}
}
}
}