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(KAAS): implemented compression methods 1, 2, 8 and 9.

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morkt
2017-03-11 11:40:30 +04:00
parent 0206bc574e
commit b0329096ff
2 changed files with 322 additions and 72 deletions
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202
ArcFormats/Kaas/ArcKAAS.cs
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@@ -2,7 +2,7 @@
//! \date Fri Apr 10 15:21:30 2015
//! \brief KAAS engine archive format implementation.
//
// Copyright (C) 2015 by morkt
// Copyright (C) 2015-2017 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
@@ -27,10 +27,21 @@ using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using GameRes.Utility;
namespace GameRes.Formats.KAAS
{
internal interface IIndexDecryptor
{
void Decrypt (byte[] data, byte key);
}
internal class PdImageEntry : Entry
{
public int Number;
}
[Export(typeof(ArchiveFormat))]
public class PdOpener : ArchiveFormat
{
@@ -50,48 +61,155 @@ namespace GameRes.Formats.KAAS
int index_offset = file.View.ReadByte (0);
if (index_offset <= 2 || index_offset >= file.MaxOffset)
return null;
int key = file.View.ReadByte (1);
byte key = file.View.ReadByte (1);
int count = 0xfff & file.View.ReadUInt16 (index_offset);
if (0 == count)
return null;
index_offset += 16;
byte[] index = new byte[count*8];
if (index.Length != file.View.Read (index_offset, index, 0, (uint)(index.Length)))
return null;
DecryptIndex (index, key);
var index = new byte[count*8];
var base_name = Path.GetFileNameWithoutExtension (file.Name);
var dir = new List<Entry> (count);
int data_offset = index_offset + index.Length;
index_offset = 0;
foreach (var decryptor in KnownDecryptors)
{
if (index.Length != file.View.Read (index_offset, index, 0, (uint)(index.Length)))
return null;
decryptor.Decrypt (index, key);
try
{
if (ReadIndex (index, dir, base_name, data_offset, file.MaxOffset)
&& dir.Count > 0)
return new ArcFile (file, this, dir);
}
catch { /* ignore errors caused by wrong decrpytor */ }
dir.Clear();
}
return null;
}
bool ReadIndex (byte[] index, List<Entry> dir, string base_name, long data_offset, long max_offset)
{
int index_offset = 0;
int count = index.Length / 8;
for (int i = 0; i < count; ++i)
{
uint offset = LittleEndian.ToUInt32 (index, index_offset);
uint size = LittleEndian.ToUInt32 (index, index_offset+4);
if (offset < data_offset || offset >= file.MaxOffset)
return null;
var entry = new Entry {
Name = string.Format ("{0:D4}.pic", i),
Type = "image",
Offset = offset,
Size = size,
};
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
if (offset < data_offset || offset >= max_offset)
return false;
if (size > 0)
{
var entry = new PdImageEntry {
Name = string.Format ("{0}#{1:D4}", base_name, i),
Type = "image",
Offset = offset,
Size = size,
Number = dir.Count
};
if (!entry.CheckPlacement (max_offset))
return false;
dir.Add (entry);
}
index_offset += 8;
}
return new ArcFile (file, this, dir);
return true;
}
private void DecryptIndex (byte[] index, int key)
static readonly IEnumerable<IIndexDecryptor> KnownDecryptors = new IIndexDecryptor[] {
new DiscoveryDecryptor(),
new OldDecryptor(),
};
public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
{
for (int i = 0; i != index.Length; ++i)
byte pic_method = arc.File.View.ReadByte (entry.Offset);
if (pic_method != 1 && pic_method != 2)
return base.OpenImage (arc, entry);
var pent = (PdImageEntry)entry;
byte[] baseline = null;
var dir = arc.Dir as List<Entry>;
for (int i = pent.Number-1; i >= 0; --i)
{
int k = i + 14;
int r = 9 - (k & 7) * (k + 5) * key * 0x77;
// int r = ((k * 0x6b) % (k / 2 + 1)) + key * 0x3b * (k + 11) * (k % (k + 17));
index[i] -= (byte)r;
var base_entry = dir[i];
byte base_method = arc.File.View.ReadByte (base_entry.Offset);
if (base_method != 1 && base_method != 2)
{
PicMetaData base_info;
using (var base_input = arc.File.CreateStream (base_entry.Offset, base_entry.Size))
{
base_info = s_picFormat.Value.ReadMetaData (base_input) as PicMetaData;
if (null == base_info)
throw new InvalidFormatException();
using (var reader = new PicFormat.Reader (base_input, base_info))
{
reader.Unpack();
baseline = reader.Data;
}
}
var overlay_info = new PdOverlayMetaData {
Width = base_info.Width,
Height = base_info.Height,
BPP = 24,
Method = pic_method,
ChunkCount = arc.File.View.ReadInt32 (pent.Offset+4),
};
var input = arc.File.CreateStream (pent.Offset, pent.Size);
return new PdOverlayImage (input, overlay_info, baseline);
}
}
return base.OpenImage (arc, entry);
}
static readonly Lazy<ImageFormat> s_picFormat = new Lazy<ImageFormat> (() => ImageFormat.FindByTag ("PIC/KAAS"));
}
internal class PdOverlayMetaData : ImageMetaData
{
public int Method;
public int ChunkCount;
}
internal class PdOverlayImage : BinaryImageDecoder
{
int m_method;
int m_chunk_count;
byte[] m_baseline;
public PdOverlayImage (IBinaryStream input, PdOverlayMetaData info, byte[] baseline) : base (input, info)
{
m_method = info.Method;
m_chunk_count = info.ChunkCount;
m_baseline = baseline;
}
protected override ImageData GetImageData ()
{
m_input.Position = 8;
if (1 == m_method)
ReadOverlayV1();
else
ReadOverlayV2();
return ImageData.Create (Info, PixelFormats.Bgr24, null, m_baseline);
}
void ReadOverlayV1 ()
{
for (int i = 0; i < m_chunk_count; ++i)
{
int dst = m_input.ReadInt24() * 3;
m_input.Read (m_baseline, dst, 3);
}
}
void ReadOverlayV2 ()
{
for (int i = 0; i < m_chunk_count; ++i)
{
int code = m_input.ReadInt24();
int dst = (code & 0x7FFFF) * 3;
int count = ((code >> 19) + 1) * 3;
m_input.Read (m_baseline, dst, count);
}
}
}
@@ -100,7 +218,7 @@ namespace GameRes.Formats.KAAS
public class PbOpener : ArchiveFormat
{
public override string Tag { get { return "PB"; } }
public override string Description { get { return "KAAS engine PB resource archive"; } }
public override string Description { get { return "KAAS engine audio archive"; } }
public override uint Signature { get { return 0; } }
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
@@ -121,7 +239,7 @@ namespace GameRes.Formats.KAAS
uint offset = file.View.ReadUInt32 (index_offset);
Entry entry;
if (!is_voice)
entry = AutoEntry.Create (file, offset, i.ToString ("D4"));
entry = new Entry { Name = i.ToString ("D4"), Type = "audio", Offset = offset };
else
entry = new Entry { Name = string.Format ("{0:D4}.pb", i), Type = "archive", Offset = offset };
entry.Size = file.View.ReadUInt32 (index_offset + 4);
@@ -133,4 +251,30 @@ namespace GameRes.Formats.KAAS
return new ArcFile (file, this, dir);
}
}
internal sealed class OldDecryptor : IIndexDecryptor
{
public void Decrypt (byte[] data, byte key)
{
for (int i = 0; i != data.Length; ++i)
{
int k = i + 14;
int r = 9 - (k & 7) * (k + 5) * key * 0x77;
data[i] -= (byte)r;
}
}
}
internal sealed class DiscoveryDecryptor : IIndexDecryptor
{
public void Decrypt (byte[] data, byte key)
{
for (int i = 0; i != data.Length; ++i)
{
int k = i + 14;
int r = ((k * 0x6b) % (k / 2 + 1)) + key * 0x3b * (k + 11) * (k % (k + 17));
data[i] -= (byte)r;
}
}
}
}