mirror of
https://github.com/crskycode/GARbro.git
synced 2024-12-28 05:44:12 +08:00
384 lines
14 KiB
C#
384 lines
14 KiB
C#
//! \file ArcBGI.cs
|
|
//! \date Tue Sep 09 09:29:12 2014
|
|
//! \brief BGI/Ethornell engine archive implementation.
|
|
//
|
|
// Copyright (C) 2014-2015 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 GameRes.Utility;
|
|
|
|
namespace GameRes.Formats.BGI
|
|
{
|
|
[Export(typeof(ArchiveFormat))]
|
|
public class ArcOpener : ArchiveFormat
|
|
{
|
|
public override string Tag { get { return "BGI"; } }
|
|
public override string Description { get { return "BGI/Ethornell engine resource archive"; } }
|
|
public override uint Signature { get { return 0x6b636150; } } // "Pack"
|
|
public override bool IsHierarchic { get { return false; } }
|
|
public override bool CanWrite { get { return false; } }
|
|
|
|
public ArcOpener ()
|
|
{
|
|
Extensions = new string[] { "arc" };
|
|
}
|
|
|
|
public override ArcFile TryOpen (ArcView file)
|
|
{
|
|
if (!file.View.AsciiEqual (4, "File "))
|
|
return null;
|
|
uint count = file.View.ReadUInt32 (12);
|
|
if (count > 0xfffff)
|
|
return null;
|
|
uint index_size = 0x20 * count;
|
|
if (index_size > file.View.Reserve (0x10, index_size))
|
|
return null;
|
|
var dir = new List<Entry> ((int)count);
|
|
long index_offset = 0x10;
|
|
long base_offset = index_offset + index_size;
|
|
for (uint i = 0; i < count; ++i)
|
|
{
|
|
string name = file.View.ReadString (index_offset, 0x10);
|
|
var entry = FormatCatalog.Instance.Create<Entry> (name);
|
|
entry.Offset = base_offset + file.View.ReadUInt32 (index_offset+0x10);
|
|
entry.Size = file.View.ReadUInt32 (index_offset+0x14);
|
|
if (!entry.CheckPlacement (file.MaxOffset))
|
|
return null;
|
|
dir.Add (entry);
|
|
index_offset += 0x20;
|
|
}
|
|
return new ArcFile (file, this, dir);
|
|
}
|
|
|
|
public override Stream OpenEntry (ArcFile arc, Entry entry)
|
|
{
|
|
var entry_offset = entry.Offset;
|
|
var input = new ArcView.Frame (arc.File, entry_offset, entry.Size);
|
|
try
|
|
{
|
|
if (entry.Size > 0x220 && input.AsciiEqual (entry_offset, "DSC FORMAT 1.00\0"))
|
|
{
|
|
using (var decoder = new DscDecoder (input))
|
|
{
|
|
decoder.Unpack();
|
|
return new BinMemoryStream (decoder.Output, entry.Name);
|
|
}
|
|
}
|
|
return new ArcViewStream (input, entry_offset, entry.Size);
|
|
}
|
|
catch (Exception X)
|
|
{
|
|
System.Diagnostics.Trace.WriteLine (X.Message, "BgiOpener");
|
|
return arc.File.CreateStream (entry.Offset, entry.Size);
|
|
}
|
|
}
|
|
}
|
|
|
|
[Export(typeof(ArchiveFormat))]
|
|
public class Arc2Opener : ArcOpener
|
|
{
|
|
public override string Tag { get { return "BURIKO ARC"; } }
|
|
public override string Description { get { return "BGI/Ethornell engine resource archive v2"; } }
|
|
public override uint Signature { get { return 0x49525542; } } // "BURI"
|
|
public override bool IsHierarchic { get { return false; } }
|
|
public override bool CanWrite { get { return false; } }
|
|
|
|
public override ArcFile TryOpen (ArcView file)
|
|
{
|
|
if (!file.View.AsciiEqual (4, "KO ARC20"))
|
|
return null;
|
|
int count = file.View.ReadInt32 (12);
|
|
if (!IsSaneCount (count))
|
|
return null;
|
|
uint index_size = 0x80 * (uint)count;
|
|
if (index_size > file.View.Reserve (0x10, index_size))
|
|
return null;
|
|
var dir = new List<Entry> (count);
|
|
long index_offset = 0x10;
|
|
long base_offset = index_offset + index_size;
|
|
for (uint i = 0; i < count; ++i)
|
|
{
|
|
string name = file.View.ReadString (index_offset, 0x60);
|
|
var offset = base_offset + file.View.ReadUInt32 (index_offset+0x60);
|
|
var entry = new Entry { Name = name, Offset = offset };
|
|
entry.Size = file.View.ReadUInt32 (index_offset+0x64);
|
|
if (!entry.CheckPlacement (file.MaxOffset))
|
|
return null;
|
|
dir.Add (entry);
|
|
index_offset += 0x80;
|
|
}
|
|
foreach (var entry in dir)
|
|
{
|
|
uint signature = file.View.ReadUInt32 (entry.Offset);
|
|
var res = AutoEntry.DetectFileType (signature);
|
|
if (res != null)
|
|
entry.Type = res.Type;
|
|
else if (file.View.AsciiEqual (entry.Offset, "BSE 1."))
|
|
entry.Type = "image";
|
|
else if (file.View.AsciiEqual (entry.Offset+4, "bw "))
|
|
entry.Type = "audio";
|
|
}
|
|
return new ArcFile (file, this, dir);
|
|
}
|
|
|
|
public override Stream OpenEntry (ArcFile arc, Entry entry)
|
|
{
|
|
if (entry.Size < 0x50 || !arc.File.View.AsciiEqual (entry.Offset, "BSE 1."))
|
|
return base.OpenEntry (arc, entry);
|
|
int version = arc.File.View.ReadUInt16 (entry.Offset+8);
|
|
if (version != 0x100 && version != 0x101)
|
|
return base.OpenEntry (arc, entry);
|
|
|
|
ushort checksum = arc.File.View.ReadUInt16 (entry.Offset+0xA);
|
|
uint key = arc.File.View.ReadUInt32 (entry.Offset+0xC);
|
|
var header = arc.File.View.ReadBytes (entry.Offset+0x10, 0x40);
|
|
if (0x101 == version)
|
|
DecryptBse (header, new BseGenerator101 (key));
|
|
else
|
|
DecryptBse (header, new BseGenerator100 (key));
|
|
var body = arc.File.CreateStream (entry.Offset+0x50, entry.Size-0x50);
|
|
return new PrefixStream (header, body);
|
|
}
|
|
|
|
void DecryptBse (byte[] data, IBseGenerator decoder)
|
|
{
|
|
var decoded = new bool[0x40];
|
|
for (int i = 0; i < decoded.Length; ++i)
|
|
{
|
|
int dst = decoder.NextKey() & 0x3F;
|
|
while (decoded[dst])
|
|
{
|
|
dst = (dst + 1) & 0x3F;
|
|
}
|
|
int shift = decoder.NextKey() & 7;
|
|
bool right_shift = (decoder.NextKey() & 1) == 0;
|
|
byte symbol = (byte)(data[dst] - decoder.NextKey());
|
|
if (right_shift)
|
|
{
|
|
data[dst] = Binary.RotByteR (symbol, shift);
|
|
}
|
|
else
|
|
{
|
|
data[dst] = Binary.RotByteL (symbol, shift);
|
|
}
|
|
decoded[dst] = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
internal class BgiDecoderBase : MsbBitStream
|
|
{
|
|
protected uint m_key;
|
|
protected uint m_magic;
|
|
|
|
protected BgiDecoderBase (Stream input, bool leave_open = false) : base (input, leave_open)
|
|
{
|
|
}
|
|
|
|
protected byte UpdateKey ()
|
|
{
|
|
uint v0 = 20021 * (m_key & 0xffff);
|
|
uint v1 = m_magic | (m_key >> 16);
|
|
v1 = v1 * 20021 + m_key * 346;
|
|
v1 = (v1 + (v0 >> 16)) & 0xffff;
|
|
m_key = (v1 << 16) + (v0 & 0xffff) + 1;
|
|
return (byte)v1;
|
|
}
|
|
}
|
|
|
|
internal sealed class DscDecoder : BgiDecoderBase
|
|
{
|
|
byte[] m_output;
|
|
uint m_dst_size;
|
|
uint m_dec_count;
|
|
|
|
public byte[] Output { get { return m_output; } }
|
|
public uint Length { get { return m_dst_size; } }
|
|
|
|
public DscDecoder (ArcView.Frame input)
|
|
: base (new ArcViewStream (input, input.Offset+0x20, input.Reserved-0x20))
|
|
{
|
|
m_magic = (uint)input.ReadUInt16 (input.Offset) << 16;
|
|
m_key = input.ReadUInt32 (input.Offset+0x10);
|
|
m_dst_size = input.ReadUInt32 (input.Offset+0x14);
|
|
m_dec_count = input.ReadUInt32 (input.Offset+0x18);
|
|
m_output = new byte[m_dst_size];
|
|
}
|
|
|
|
public void Unpack ()
|
|
{
|
|
HuffmanCode[] hcodes = new HuffmanCode[512];
|
|
HuffmanNode[] hnodes = new HuffmanNode[1023];
|
|
|
|
int leaf_node_count = 0;
|
|
for (ushort i = 0; i < 512; i++)
|
|
{
|
|
int src = Input.ReadByte();
|
|
if (-1 == src)
|
|
throw new EndOfStreamException ("Incomplete compressed stream");
|
|
byte depth = (byte)(src - UpdateKey());
|
|
if (0 != depth)
|
|
{
|
|
hcodes[leaf_node_count].Depth = depth;
|
|
hcodes[leaf_node_count].Code = i;
|
|
leaf_node_count++;
|
|
}
|
|
}
|
|
Array.Sort (hcodes, 0, leaf_node_count);
|
|
CreateHuffmanTree (hnodes, hcodes, leaf_node_count);
|
|
HuffmanDecompress (hnodes, m_dec_count);
|
|
}
|
|
|
|
struct HuffmanCode : IComparable<HuffmanCode>
|
|
{
|
|
public ushort Code;
|
|
public ushort Depth;
|
|
|
|
public int CompareTo (HuffmanCode other)
|
|
{
|
|
int cmp = (int)Depth - (int)other.Depth;
|
|
if (0 == cmp)
|
|
cmp = (int)Code - (int)other.Code;
|
|
return cmp;
|
|
}
|
|
}
|
|
|
|
class HuffmanNode
|
|
{
|
|
public bool IsParent;
|
|
public int Code;
|
|
public int LeftChildIndex;
|
|
public int RightChildIndex;
|
|
}
|
|
|
|
static void CreateHuffmanTree (HuffmanNode[] hnodes, HuffmanCode[] hcode, int node_count)
|
|
{
|
|
var nodes_index = new int[2,512];
|
|
int next_node_index = 1;
|
|
int depth_nodes = 1;
|
|
int depth = 0;
|
|
int child_index = 0;
|
|
nodes_index[0,0] = 0;
|
|
for (int n = 0; n < node_count; )
|
|
{
|
|
int huffman_nodes_index = child_index;
|
|
child_index ^= 1;
|
|
|
|
int depth_existed_nodes = 0;
|
|
while (n < hcode.Length && hcode[n].Depth == depth)
|
|
{
|
|
var node = new HuffmanNode { IsParent = false, Code = hcode[n++].Code };
|
|
hnodes[nodes_index[huffman_nodes_index, depth_existed_nodes]] = node;
|
|
depth_existed_nodes++;
|
|
}
|
|
int depth_nodes_to_create = depth_nodes - depth_existed_nodes;
|
|
for (int i = 0; i < depth_nodes_to_create; i++)
|
|
{
|
|
var node = new HuffmanNode { IsParent = true };
|
|
nodes_index[child_index, i * 2] = node.LeftChildIndex = next_node_index++;
|
|
nodes_index[child_index, i * 2 + 1] = node.RightChildIndex = next_node_index++;
|
|
hnodes[nodes_index[huffman_nodes_index, depth_existed_nodes+i]] = node;
|
|
}
|
|
depth++;
|
|
depth_nodes = depth_nodes_to_create * 2;
|
|
}
|
|
}
|
|
|
|
int HuffmanDecompress (HuffmanNode[] hnodes, uint dec_count)
|
|
{
|
|
int dst_ptr = 0;
|
|
|
|
for (uint k = 0; k < dec_count; k++)
|
|
{
|
|
int node_index = 0;
|
|
do
|
|
{
|
|
int bit = GetNextBit();
|
|
if (-1 == bit)
|
|
throw new EndOfStreamException();
|
|
if (0 == bit)
|
|
node_index = hnodes[node_index].LeftChildIndex;
|
|
else
|
|
node_index = hnodes[node_index].RightChildIndex;
|
|
}
|
|
while (hnodes[node_index].IsParent);
|
|
|
|
int code = hnodes[node_index].Code;
|
|
if (code >= 256)
|
|
{
|
|
int offset = GetBits (12);
|
|
if (-1 == offset)
|
|
break;
|
|
int count = (code & 0xff) + 2;
|
|
offset += 2;
|
|
Binary.CopyOverlapped (m_output, dst_ptr - offset, dst_ptr, count);
|
|
dst_ptr += count;
|
|
} else
|
|
m_output[dst_ptr++] = (byte)code;
|
|
}
|
|
return dst_ptr;
|
|
}
|
|
}
|
|
|
|
internal interface IBseGenerator
|
|
{
|
|
int NextKey ();
|
|
}
|
|
|
|
internal class BseGenerator100 : IBseGenerator
|
|
{
|
|
int m_key;
|
|
|
|
public BseGenerator100 (uint key)
|
|
{
|
|
m_key = (int)key;
|
|
}
|
|
|
|
public int NextKey ()
|
|
{
|
|
uint v = (uint)(((m_key * 257 >> 8) + m_key * 97 + 23) ^ 0xA6CD9B75);
|
|
m_key = (int)Binary.RotR (v, 16);
|
|
return m_key;
|
|
}
|
|
}
|
|
|
|
internal class BseGenerator101 : IBseGenerator
|
|
{
|
|
int m_key;
|
|
|
|
public BseGenerator101 (uint key)
|
|
{
|
|
m_key = (int)key;
|
|
}
|
|
|
|
public int NextKey ()
|
|
{
|
|
uint v = (uint)((m_key * 127 >> 7) + m_key * 83 + 53) ^ 0xB97A7E5C;
|
|
m_key = (int)Binary.RotR (v, 16);
|
|
return m_key;
|
|
}
|
|
}
|
|
}
|