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(Legacy): implemented FL4 archives.

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morkt 2018-01-14 03:06:22 +04:00
parent 2512cba973
commit 08016ea454
1 changed files with 178 additions and 0 deletions
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Legacy/Aaru/ArcFL4.cs Normal file
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//! \file ArcFL4.cs
//! \date 2018 Jan 13
//! \brief Aaru resource archive.
//
// Copyright (C) 2018 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.Compression;
// [021025][Aaru] Kokoro... II
namespace GameRes.Formats.Aaru
{
[Export(typeof(ArchiveFormat))]
public class Fl4Opener : ArchiveFormat
{
public override string Tag { get { return "FL4/AARU"; } }
public override string Description { get { return "Aaru resource archive"; } }
public override uint Signature { get { return 0x2E344C46; } } // 'FL4.0'
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
if (file.View.ReadByte (4) != '0')
return null;
uint data_offset = file.View.ReadUInt16 (8);
uint index_size = file.View.ReadUInt32 (0xA);
long index_offset = file.View.ReadUInt32 (0xE);
if (index_offset + index_size > file.MaxOffset)
return null;
ushort key = file.View.ReadUInt16 (0x16);
ushort flags = file.View.ReadUInt16 (0x18);
var index = file.View.ReadBytes (index_offset, index_size);
int pos = index.ToInt32 (0);
if (pos <= 0)
return null;
var dir = new List<Entry>();
while (pos < index.Length)
{
uint offset = index.ToUInt32 (pos);
if (uint.MaxValue == offset)
break;
uint size = index.ToUInt32 (pos+4);
int name_length = index[pos+8];
pos += 9;
var name = Encodings.cp932.GetString (index, pos, name_length);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = offset + data_offset;
entry.Size = size;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
pos += name_length;
}
if (0 == dir.Count)
return null;
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var pent = entry as PackedEntry;
if (null == pent || !pent.IsPacked)
{
if (arc.File.View.AsciiEqual (entry.Offset, "PD"))
{
pent.IsPacked = true;
pent.UnpackedSize = arc.File.View.ReadUInt32 (entry.Offset+6);
}
else if (arc.File.View.AsciiEqual (entry.Offset, "RD1.0"))
{
pent.IsPacked = true;
}
if (!pent.IsPacked)
return base.OpenEntry (arc, entry);
}
if (arc.File.View.AsciiEqual (entry.Offset, "PD"))
{
var input = arc.File.CreateStream (entry.Offset+10, entry.Size-10);
return new LzssStream (input);
}
else
{
uint offset = arc.File.View.ReadUInt16 (entry.Offset+6);
var input = arc.File.CreateStream (entry.Offset+offset, entry.Size-offset);
int rle_chunks = arc.File.View.ReadInt32 (entry.Offset+0xA);
return new RlePackedStream (input, rle_chunks);
}
}
}
internal class RlePackedStream : PackedStream<RleDecompressor>
{
public RlePackedStream (Stream input, int rle_chunks) : base (input)
{
Reader.Chunks = rle_chunks;
}
}
internal class RleDecompressor : Decompressor
{
IBinaryStream m_input;
public int Chunks { get; set; }
public override void Initialize (Stream input)
{
m_input = BinaryStream.FromStream (input, "");
}
protected override IEnumerator<int> Unpack ()
{
for (int i = 0; i < Chunks; ++i)
{
int ctl = m_input.ReadByte();
if (-1 == ctl)
yield break;
int count;
if (ctl <= 1)
{
if (0 == ctl)
count = m_input.ReadUInt8();
else
count = 0x100;
while (count > 0)
{
int avail = Math.Min (count, m_length);
int read = m_input.Read (m_buffer, m_pos, avail);
if (0 == read)
yield break;
count -= read;
m_pos += read;
m_length -= read;
if (0 == m_length)
yield return m_pos;
}
}
else
{
if (3 == ctl)
count = m_input.ReadUInt16();
else
count = ctl;
byte v = m_input.ReadUInt8();
while (count --> 0)
{
m_buffer[m_pos++] = v;
if (0 == --m_length)
yield return m_pos;
}
}
}
}
}
}