mirror of
https://github.com/crskycode/GARbro.git
synced 2024-11-23 13:45:34 +08:00
implemented LAX archives.
This commit is contained in:
morkt
parent
4631caa346
commit
9b9d91a954
231
ArcFormats/Lambda/ArcLAX.cs
Normal file
231
ArcFormats/Lambda/ArcLAX.cs
Normal file
@ -0,0 +1,231 @@
|
||||
//! \file ArcLAX.cs
|
||||
//! \date 2017 Dec 31
|
||||
//! \brief Lambda 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.Lambda
|
||||
{
|
||||
[Export(typeof(ArchiveFormat))]
|
||||
public class LaxOpener : ArchiveFormat
|
||||
{
|
||||
public override string Tag { get { return "LAX"; } }
|
||||
public override string Description { get { return "Lambda engine resource archive"; } }
|
||||
public override uint Signature { get { return 0x70614C24; } } // '$LapH__'
|
||||
public override bool IsHierarchic { get { return true; } }
|
||||
public override bool CanWrite { get { return false; } }
|
||||
|
||||
public override ArcFile TryOpen (ArcView file)
|
||||
{
|
||||
long index_offset = file.MaxOffset-0x28;
|
||||
if (!file.View.AsciiEqual (index_offset, "$LapI__"))
|
||||
return null;
|
||||
int count = file.View.ReadInt32 (index_offset+8);
|
||||
if (!IsSaneCount (count))
|
||||
return null;
|
||||
uint unpacked_size = file.View.ReadUInt32 (index_offset+0x10);
|
||||
uint packed_size = file.View.ReadUInt32 (index_offset+0x14);
|
||||
index_offset = file.View.ReadUInt32 (index_offset+0xC);
|
||||
var index = new byte[unpacked_size];
|
||||
using (var input = file.CreateStream (index_offset, packed_size))
|
||||
using (var lax = new LaxStream (input))
|
||||
lax.Read (index, 0, index.Length);
|
||||
|
||||
uint data_offset = 8;
|
||||
int entry_length = 0x128;
|
||||
int pos = 0;
|
||||
var dir = new List<Entry> (count);
|
||||
for (int i = 0; i < count; ++i)
|
||||
{
|
||||
if (!index.AsciiEqual (pos, "$LapF__"))
|
||||
return null;
|
||||
var name = Binary.GetCString (index, pos+0x24, 0x104);
|
||||
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
|
||||
entry.UnpackedSize = index.ToUInt32 (pos+0x10);
|
||||
entry.Size = index.ToUInt32 (pos+0x14);
|
||||
entry.Offset = index.ToUInt32 (pos+0x18) + data_offset;
|
||||
if (!entry.CheckPlacement (file.MaxOffset))
|
||||
return null;
|
||||
if (name.HasExtension (".bmx"))
|
||||
entry.Type = "image";
|
||||
dir.Add (entry);
|
||||
pos += entry_length;
|
||||
}
|
||||
return new ArcFile (file, this, dir);
|
||||
}
|
||||
|
||||
public override Stream OpenEntry (ArcFile arc, Entry entry)
|
||||
{
|
||||
var input = arc.File.CreateStream (entry.Offset, entry.Size);
|
||||
return new LaxStream (input);
|
||||
}
|
||||
}
|
||||
|
||||
internal class LaxStream : InputProxyStream
|
||||
{
|
||||
public LaxStream (Stream input, bool leave_open = false) : base (input, leave_open)
|
||||
{
|
||||
}
|
||||
|
||||
byte[] m_buffer;
|
||||
int m_buffer_size;
|
||||
int m_buffer_pos;
|
||||
|
||||
public override int Read (byte[] buffer, int offset, int count)
|
||||
{
|
||||
int total_read = 0;
|
||||
while (count > 0)
|
||||
{
|
||||
if (m_buffer_pos == m_buffer_size)
|
||||
{
|
||||
if (m_eof)
|
||||
break;
|
||||
ReadSegment();
|
||||
}
|
||||
int available = Math.Min (count, m_buffer_size - m_buffer_pos);
|
||||
Buffer.BlockCopy (m_buffer, m_buffer_pos, buffer, offset, available);
|
||||
m_buffer_pos += available;
|
||||
offset += available;
|
||||
count -= available;
|
||||
total_read += available;
|
||||
}
|
||||
return total_read;
|
||||
}
|
||||
|
||||
bool m_eof = false;
|
||||
|
||||
void ReadSegment ()
|
||||
{
|
||||
if (null == m_buffer)
|
||||
m_buffer = new byte[0x8000];
|
||||
m_buffer_pos = m_buffer_size = 0;
|
||||
long chunk_start = BaseStream.Position;
|
||||
if (BaseStream.Read (m_buffer, 0, 10) < 10)
|
||||
{
|
||||
m_eof = true;
|
||||
return;
|
||||
}
|
||||
if (!m_buffer.AsciiEqual ("_AF"))
|
||||
throw new InvalidFormatException ("Invalid compressed LAX stream.");
|
||||
int chunk_size = m_buffer.ToUInt16 (4);
|
||||
int final_size = m_buffer.ToUInt16 (6);
|
||||
if (final_size != 0)
|
||||
throw new NotImplementedException ("Double compression in LAX streams not implemented.");
|
||||
int unpacked_size = m_buffer.ToUInt16 (8);
|
||||
if (unpacked_size > m_buffer.Length)
|
||||
m_buffer = new byte[unpacked_size];
|
||||
|
||||
int method = m_buffer[3];
|
||||
switch (method) // compression method
|
||||
{
|
||||
case '1':
|
||||
m_buffer_size = LzssUnpack (unpacked_size);
|
||||
break;
|
||||
|
||||
case '2':
|
||||
m_buffer_size = HuffmanUnpack (unpacked_size);
|
||||
break;
|
||||
|
||||
default:
|
||||
m_buffer_size = BaseStream.Read (m_buffer, 0, unpacked_size);
|
||||
break;
|
||||
}
|
||||
BaseStream.Position = chunk_start + chunk_size;
|
||||
}
|
||||
|
||||
byte[] m_frame = new byte[0x1000];
|
||||
|
||||
int LzssUnpack (int unpacked_size)
|
||||
{
|
||||
for (int i = 0; i < m_frame.Length; ++i)
|
||||
m_frame[i] = 0;
|
||||
int frame_pos = 0xFEE;
|
||||
int bits = 2;
|
||||
int dst = 0;
|
||||
while (dst < unpacked_size)
|
||||
{
|
||||
bits >>= 1;
|
||||
if (1 == bits)
|
||||
{
|
||||
bits = BaseStream.ReadByte();
|
||||
if (-1 == bits)
|
||||
break;
|
||||
bits |= 0x100;
|
||||
}
|
||||
int lo = BaseStream.ReadByte();
|
||||
if (-1 == lo)
|
||||
break;
|
||||
if (0 != (bits & 1))
|
||||
{
|
||||
m_buffer[dst++] = m_frame[frame_pos++ & 0xFFF] = (byte)lo;
|
||||
}
|
||||
else
|
||||
{
|
||||
int hi = BaseStream.ReadByte();
|
||||
if (-1 == hi)
|
||||
break;
|
||||
int offset = (hi & 0xF0) << 4 | lo;
|
||||
int count = Math.Min (3 + (hi & 0xF), unpacked_size - dst);
|
||||
while (count --> 0)
|
||||
{
|
||||
byte v = m_frame[offset++ & 0xFFF];
|
||||
m_buffer[dst++] = m_frame[frame_pos++ & 0xFFF] = v;
|
||||
}
|
||||
}
|
||||
}
|
||||
return dst;
|
||||
}
|
||||
|
||||
int HuffmanUnpack (int unpacked_size)
|
||||
{
|
||||
throw new NotImplementedException ("LAX compression method 2 not implemented.");
|
||||
}
|
||||
|
||||
#region IO.Stream members
|
||||
public override bool CanSeek { get { return false; } }
|
||||
public override long Length
|
||||
{
|
||||
get { throw new NotSupportedException ("Stream.Length property is not supported"); }
|
||||
}
|
||||
public override long Position
|
||||
{
|
||||
get { throw new NotSupportedException ("Stream.Position property is not supported"); }
|
||||
set { throw new NotSupportedException ("Stream.Position property is not supported"); }
|
||||
}
|
||||
|
||||
public override void Flush()
|
||||
{
|
||||
}
|
||||
|
||||
public override long Seek (long offset, SeekOrigin origin)
|
||||
{
|
||||
throw new NotSupportedException ("LzssStream.Seek method is not supported");
|
||||
}
|
||||
#endregion
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user