GARbro-mirror/ArcFormats/MokoPro/CompressedFile.cs

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//! \file CompressedFile.cs
//! \date Fri Feb 05 01:33:25 2016
//! \brief Mokopro compressed resources.
//
// Copyright (C) 2016 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.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using GameRes.Compression;
using GameRes.Utility;
namespace GameRes.Formats.Mokopro
{
internal class NNNNMetaData : ImageMetaData
{
public ImageMetaData BmpInfo;
public MokoCrypt Input;
}
internal class MokoCrypt
{
static readonly byte[] DefaultKey = new byte[] { 1, 0x23 };
byte[] m_input;
int m_unpacked_size;
public MokoCrypt (Stream stream)
{
var header = new byte[8];
if (8 != stream.Read (header, 0, 8) || !Binary.AsciiEqual (header, 0, "NNNN"))
throw new InvalidFormatException();
m_unpacked_size = LittleEndian.ToInt32 (header, 4);
if (m_unpacked_size <= 0)
throw new InvalidFormatException();
m_input = new byte[stream.Length-8];
stream.Read (m_input, 0, m_input.Length);
Decrypt (m_input, DefaultKey);
}
public Stream UnpackStream ()
{
var lzss = new LzssStream (new MemoryStream (m_input));
lzss.Config.FrameFill = 0x20;
return lzss;
}
public byte[] UnpackBytes ()
{
using (var mem = new MemoryStream (m_input))
using (var lzss = new LzssReader (mem, m_input.Length, m_unpacked_size))
{
lzss.FrameFill = 0x20;
lzss.Unpack();
return lzss.Data;
}
}
public static void Decrypt (byte[] input, byte[] key)
{
for (int i = input.Length-2; i >= 0; --i)
{
input[i] ^= (byte)(key[1] ^ input[i+1]);
input[i+1] ^= (byte)(key[0] ^ input[i]);
}
}
}
[Export(typeof(ImageFormat))]
public class NNNNBmpFormat : BmpFormat
{
public override string Tag { get { return "BMP/NNNN"; } }
public override string Description { get { return "Mokopro compressed bitmap"; } }
public override uint Signature { get { return 0x4E4E4E4E; } } // 'NNNN'
public NNNNBmpFormat ()
{
Extensions = new string[0];
}
public override ImageMetaData ReadMetaData (Stream stream)
{
var moko = new MokoCrypt (stream);
using (var lzss = moko.UnpackStream())
{
var info = base.ReadMetaData (lzss);
if (null == info)
return null;
return new NNNNMetaData
{
Width = info.Width,
Height = info.Height,
BPP = info.BPP,
BmpInfo = info,
Input = moko,
};
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = (NNNNMetaData)info;
using (var lzss = meta.Input.UnpackStream())
return base.Read (lzss, meta.BmpInfo);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("NNNNFormat.Write not implemented");
}
}
[Export(typeof(AudioFormat))]
public class NNNNOggAudio : AudioFormat
{
public override string Tag { get { return "OGG/NNNN"; } }
public override string Description { get { return "Mokopro compressed audio"; } }
public override uint Signature { get { return 0x4E4E4E4E; } } // 'NNNN'
public NNNNOggAudio ()
{
Extensions = new string[0];
}
public override SoundInput TryOpen (Stream stream)
{
var moko = new MokoCrypt (stream);
var ogg = moko.UnpackBytes();
var output = new MemoryStream (ogg);
try
{
return new OggInput (output);
}
catch
{
output.Dispose();
throw;
}
}
}
[Export(typeof(ArchiveFormat))]
public class NNNNOpener : ArchiveFormat
{
public override string Tag { get { return "DAT/NNNN"; } }
public override string Description { get { return "Mokopro compressed file"; } }
public override uint Signature { get { return 0x4E4E4E4E; } } // 'NNNN'
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return false; } }
public NNNNOpener ()
{
Extensions = new string[] { "dat" };
}
public override ArcFile TryOpen (ArcView file)
{
var name = Path.GetFileName (file.Name);
var dir = new List<Entry> (1);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = 0;
entry.Size = (uint)file.MaxOffset;
entry.UnpackedSize = file.View.ReadUInt32 (4);
dir.Add (entry);
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);
var moko = new MokoCrypt (input);
return moko.UnpackStream();
}
}
}