GARbro-mirror/ArcFormats/TopCat/ArcTCD3.cs

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//! \file ArcTCD3.cs
//! \date Thu Oct 08 13:14:57 2015
//! \brief TopCat data archives (TCD)
//
// Copyright (C) 2015 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 System.Linq;
using GameRes.Utility;
namespace GameRes.Formats.TopCat
{
internal class TcdSection
{
public uint DataSize;
public uint IndexOffset;
public int DirCount;
public int DirNameLength;
public int FileCount;
public int FileNameLength;
}
internal struct TcdDirEntry
{
public int FileCount;
public int NamesOffset;
public int FirstIndex;
}
internal class TcdEntry : AutoEntry
{
public int Index;
public TcdEntry (int index, string name, ArcView file, long offset)
: base (name, () => DetectFileType (file, offset))
{
Index = index;
Offset = offset;
}
private static IResource DetectFileType (ArcView file, long offset)
{
uint signature = file.View.ReadUInt32 (offset);
return FormatCatalog.Instance.LookupSignature (signature).FirstOrDefault();
}
}
internal class TcdArchive : ArcFile
{
public int? Key;
public TcdArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir)
: base (arc, impl, dir)
{
}
}
[Serializable]
public class TcdScheme : ResourceScheme
{
public Dictionary<string, int> KnownKeys;
}
[Export(typeof(ArchiveFormat))]
public class TcdOpener : ArchiveFormat
{
public override string Tag { get { return "TCD3"; } }
public override string Description { get { return "TopCat data archive"; } }
public override uint Signature { get { return 0x33444354; } } // 'TCD3'
public override bool IsHierarchic { get { return true; } }
public override bool CanCreate { get { return false; } }
public TcdOpener ()
{
Extensions = new string[] { "tcd" };
}
public static Dictionary<string, int> KnownKeys = new Dictionary<string, int>();
public override ResourceScheme Scheme
{
get { return new TcdScheme { KnownKeys = KnownKeys }; }
set { KnownKeys = ((TcdScheme)value).KnownKeys; }
}
public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (4);
if (!IsSaneCount (count))
return null;
uint current_offset = 8;
var sections = new List<TcdSection> (5);
for (int i = 0; i < 5; ++i, current_offset += 0x20)
{
uint index_offset = file.View.ReadUInt32 (current_offset+4);
if (0 == index_offset)
continue;
var section = new TcdSection
{
IndexOffset = index_offset,
DataSize = file.View.ReadUInt32 (current_offset),
DirCount = file.View.ReadInt32 (current_offset+8),
DirNameLength = file.View.ReadInt32 (current_offset+0x0C),
FileCount = file.View.ReadInt32 (current_offset+0x10),
FileNameLength = file.View.ReadInt32 (current_offset+0x14),
};
sections.Add (section);
}
var list = new List<Entry> (count);
foreach (var section in sections)
{
current_offset = section.IndexOffset;
uint dir_size = (uint)(section.DirCount * section.DirNameLength);
var dir_names = new byte[dir_size];
if (dir_size != file.View.Read (current_offset, dir_names, 0, dir_size))
return null;
current_offset += dir_size;
DecryptNames (dir_names, section.DirNameLength);
var dirs = new TcdDirEntry[section.DirCount];
for (int i = 0; i < dirs.Length; ++i)
{
dirs[i].FileCount = file.View.ReadInt32 (current_offset);
dirs[i].NamesOffset = file.View.ReadInt32 (current_offset+4);
dirs[i].FirstIndex = file.View.ReadInt32 (current_offset+8);
current_offset += 0x10;
}
uint entries_size = (uint)(section.FileCount * section.FileNameLength);
var file_names = new byte[entries_size];
if (entries_size != file.View.Read (current_offset, file_names, 0, entries_size))
return null;
current_offset += entries_size;
DecryptNames (file_names, section.FileNameLength);
var offsets = new uint[section.FileCount + 1];
for (int i = 0; i < offsets.Length; ++i)
{
offsets[i] = file.View.ReadUInt32 (current_offset);
current_offset += 4;
}
int dir_name_offset = 0;
foreach (var dir in dirs)
{
string dir_name = Binary.GetCString (dir_names, dir_name_offset, section.DirNameLength);
dir_name_offset += section.DirNameLength;
int index = dir.FirstIndex;
int name_offset = dir.NamesOffset;
for (int i = 0; i < dir.FileCount; ++i)
{
string name = Binary.GetCString (file_names, name_offset, section.FileNameLength);
name_offset += section.FileNameLength;
name = dir_name + '\\' + name;
var entry = new TcdEntry (index, name, file, offsets[index]);
entry.Size = offsets[index+1] - offsets[index];
++index;
list.Add (entry);
}
}
}
return new TcdArchive (file, this, list);
}
private void DecryptNames (byte[] buffer, int name_length)
{
byte key = buffer[name_length-1];
for (int i = 0; i < buffer.Length; ++i)
buffer[i] -= key;
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var tcde = entry as TcdEntry;
var tcda = arc as TcdArchive;
if (null == tcde || null == tcda || entry.Size <= 0x14)
return arc.File.CreateStream (entry.Offset, entry.Size);
int signature = arc.File.View.ReadInt32 (entry.Offset);
if (0x43445053 == signature) // 'SPDC'
return arc.File.CreateStream (entry.Offset, entry.Size);
if (0x5367674F == signature) // 'OggS'
return DecryptOgg (arc, entry);
var header = new byte[0x14];
arc.File.View.Read (entry.Offset, header, 0, 0x14);
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bool spdc_entry = false;
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if (null == tcda.Key)
{
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foreach (var key in KnownKeys.Values)
{
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int first = signature + key * (tcde.Index + 3);
if (0x43445053 == first) // 'SPDC'
{
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tcda.Key = key;
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spdc_entry = true;
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break;
}
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}
}
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else if (0x43445053 == signature + tcda.Key.Value * (tcde.Index + 3))
{
spdc_entry = true;
}
if (spdc_entry && 0 != tcda.Key.Value)
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{
unsafe
{
fixed (byte* raw = header)
{
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int* dw = (int*)raw;
for (int i = 0; i < 5; ++i)
dw[i] += tcda.Key.Value * (tcde.Index + 3 + i);
}
}
}
var rest = arc.File.CreateStream (entry.Offset+0x14, entry.Size-0x14);
return new PrefixStream (header, rest);
}
static Lazy<uint[]> OggCrcTable = new Lazy<uint[]> (InitOggCrcTable);
static uint[] InitOggCrcTable ()
{
var table = new uint[0x100];
for (uint i = 0; i < 0x100; ++i)
{
uint a = i << 24;
for (int j = 0; j < 8; ++j)
{
bool carry = 0 != (a & 0x80000000);
a <<= 1;
if (carry)
a ^= 0x04C11DB7;
}
table[i] = a;
}
return table;
}
Stream DecryptOgg (ArcFile arc, Entry entry)
{
var data = new byte[entry.Size];
arc.File.View.Read (entry.Offset, data, 0, entry.Size);
int remaining = data.Length;
int src = 0;
while (remaining > 0x1B && Binary.AsciiEqual (data, src, "OggS"))
{
int d = data[src+0x1A];
data[src+0x16] = 0;
data[src+0x17] = 0;
data[src+0x18] = 0;
data[src+0x19] = 0;
int dst = src + 0x1B;
int count = d + 0x1B;
if (d != 0)
{
if (remaining < count)
break;
for (int i = 0; i < d; ++i)
count += data[dst++];
}
remaining -= count;
if (remaining < 0)
break;
dst = src + 0x16;
uint crc = 0;
for (int i = 0; i < count; ++i)
{
uint x = (crc >> 24) ^ data[src++];
crc <<= 8;
crc ^= OggCrcTable.Value[x];
}
LittleEndian.Pack (crc, data, dst);
}
return new MemoryStream (data);
}
}
}