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implemented FA2 archives and C24 images.

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morkt
2017-02-19 16:01:11 +04:00
parent e1e252884b
commit afe9159853
4 changed files with 503 additions and 0 deletions
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ArcFormats/Foster/ArcFA2.cs Normal file
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//! \file ArcFA2.cs
//! \date Sun Feb 19 10:46:57 2017
//! \brief Foster game engine resource archive.
//
// Copyright (C) 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
// 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.Foster
{
[Export(typeof(ArchiveFormat))]
public class Fa2Opener : ArchiveFormat
{
public override string Tag { get { return "FA2"; } }
public override string Description { get { return "Foster game engine resource archive"; } }
public override uint Signature { get { return 0x00324146; } } // 'FA2'
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (0xC);
if (!IsSaneCount (count))
return null;
bool is_packed = (file.View.ReadByte (4) & 1) != 0;
uint index_offset = file.View.ReadUInt32 (8);
byte[] index;
using (var input = file.CreateStream (index_offset))
{
if (is_packed)
index = Decompress (input, (uint)count * 0x20);
else
index = file.View.ReadBytes (index_offset, (uint)(file.MaxOffset - index_offset));
}
uint data_offset = 0x10;
int index_pos = 0;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = Binary.GetCString (index, index_pos, 0xF);
index_pos += 0xF;
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.IsPacked = (index[index_pos] & 2) != 0;
entry.Offset = data_offset;
index_pos += 9;
entry.UnpackedSize = index.ToUInt32 (index_pos);
entry.Size = index.ToUInt32 (index_pos+4);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_pos += 8;
data_offset += (entry.Size + 0xFu) & ~0xFu;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);
var pent = entry as PackedEntry;
if (null == pent || !pent.IsPacked)
return input;
var data = Decompress (input, pent.UnpackedSize);
return new BinMemoryStream (data, entry.Name);
}
byte[] Decompress (IBinaryStream input, uint unpacked_size)
{
var comp = new Fa2Compression (input, unpacked_size);
return comp.Unpack();
}
}
internal class Fa2Compression
{
IBinaryStream m_input;
byte[] m_output;
public Fa2Compression (IBinaryStream input, uint unpacked_size)
{
m_input = input;
m_output = new byte[unpacked_size];
}
public byte[] Unpack ()
{
m_bit_count = 0;
int dst = 0;
while (dst < m_output.Length)
{
if (GetNextBit() != 0)
{
m_output[dst++] = m_input.ReadUInt8();
continue;
}
int offset;
if (GetNextBit() != 0)
{
if (GetNextBit() != 0)
{
offset = m_input.ReadUInt8() << 3;
offset |= GetBits (3);
offset += 0x100;
if (offset >= 0x8FF)
break;
}
else
{
offset = m_input.ReadUInt8();
}
m_output[dst ] = m_output[dst-offset-1];
m_output[dst+1] = m_output[dst-offset ];
dst += 2;
}
else
{
if (GetNextBit() != 0)
{
offset = m_input.ReadUInt8() << 1;
offset |= GetNextBit();
}
else
{
offset = 0x100;
if (GetNextBit() != 0)
{
offset |= m_input.ReadUInt8();
offset <<= 1;
offset |= GetNextBit();
}
else if (GetNextBit() != 0)
{
offset |= m_input.ReadUInt8();
offset <<= 2;
offset |= GetBits (2);
}
else if (GetNextBit() != 0)
{
offset |= m_input.ReadUInt8();
offset <<= 3;
offset |= GetBits (3);
}
else
{
offset |= m_input.ReadUInt8();
offset <<= 4;
offset |= GetBits (4);
}
}
int count = 0;
if (GetNextBit() != 0)
{
count = 3;
}
else if (GetNextBit() != 0)
{
count = 4;
}
else if (GetNextBit() != 0)
{
count = 5 + GetNextBit();
}
else if (GetNextBit() != 0)
{
count = 7 + GetBits (2);
}
else if (GetNextBit() != 0)
{
count = 11 + GetBits (4);
}
else
{
count = 27 + m_input.ReadUInt8();
}
Binary.CopyOverlapped (m_output, dst - offset - 1, dst, count);
dst += count;
}
}
return m_output;
}
uint m_bits;
int m_bit_count;
void FetchBits ()
{
m_bits = m_input.ReadUInt32();
m_bit_count = 32;
}
int GetNextBit ()
{
if (0 == m_bit_count)
FetchBits();
int bit = (int)((m_bits >> 31) & 1);
m_bits <<= 1;
--m_bit_count;
return bit;
}
int GetBits (int count)
{
uint bits = 0;
int avail_bits = Math.Min (count, m_bit_count);
if (avail_bits > 0)
{
bits = m_bits >> (32 - avail_bits);
m_bits <<= avail_bits;
m_bit_count -= avail_bits;
count -= avail_bits;
}
if (count > 0)
{
FetchBits();
bits = bits << count | m_bits >> (32 - count);
m_bits <<= count;
m_bit_count -= count;
}
return (int)bits;
}
}
}