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(MK2): added BPR01 decompressor.

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morkt 2018-01-21 11:54:23 +04:00
parent 834fc8631b
commit e00dc73aad
1 changed files with 73 additions and 30 deletions
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89
ArcFormats/Maika/ArcMK2.cs
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@ -2,7 +2,7 @@
//! \date Thu Aug 04 05:11:20 2016
//! \brief MAIKA resource archives.
//
// Copyright (C) 2016 by morkt
// Copyright (C) 2016-2018 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
@ -94,11 +94,14 @@ namespace GameRes.Formats.Maika
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
ushort signature = arc.File.View.ReadUInt16 (entry.Offset);
// C1/D1/E1/F1
if (0x3146 != signature && 0x3143 != signature && 0x3144 != signature && 0x3145 != signature)
return base.OpenEntry (arc, entry);
uint packed_size = arc.File.View.ReadUInt32 (entry.Offset+2);
if (packed_size < 14 || packed_size > entry.Size-10)
return base.OpenEntry (arc, entry);
// XXX scrambling might be applicable for 'E1' signatures only
var prefix = arc.File.View.ReadBytes (entry.Offset+10, 14);
byte t = prefix[7];
prefix[7] = prefix[11];
@ -106,49 +109,89 @@ namespace GameRes.Formats.Maika
t = prefix[9];
prefix[9] = prefix[12];
prefix[12] = t;
Stream input = arc.File.CreateStream (entry.Offset+24, packed_size-14);
input = new PrefixStream (prefix, input);
input = new LzssStream (input);
var header = new byte[5];
input.Read (header, 0, 5);
if (!Binary.AsciiEqual (header, "BPR02"))
if (Binary.AsciiEqual (header, "BPR02"))
return new PackedStream<Bpr02Decompressor> (input);
if (Binary.AsciiEqual (header, "BPR01"))
return new PackedStream<Bpr01Decompressor> (input);
return new PrefixStream (header, input);
using (input)
return Unpack (input);
}
}
Stream Unpack (Stream input)
internal abstract class BprDecompressor : Decompressor
{
using (var reader = new ArcView.Reader (input))
readonly byte m_rle_code;
IBinaryStream m_input;
protected BprDecompressor (byte rle_code)
{
m_rle_code = rle_code;
}
public override void Initialize (Stream input)
{
m_input = new BinaryStream (input, "");
}
protected override IEnumerator<int> Unpack ()
{
var output = new MemoryStream();
var buffer = new byte[0x10000];
for (;;)
{
int ctl = input.ReadByte();
int ctl = m_input.ReadByte();
if (-1 == ctl || 0xFF == ctl)
break;
int count = reader.ReadInt32();
if (3 == ctl)
yield break;
int count = m_input.ReadInt32();
if (m_rle_code == ctl)
{
byte b = reader.ReadByte();
for (int i = 0; i < count; ++i)
output.WriteByte (b);
byte b = m_input.ReadUInt8();
while (count --> 0)
{
m_buffer[m_pos++] = b;
if (0 == --m_length)
yield return m_pos;
}
}
else
{
while (count > 0)
{
int chunk = Math.Min (count, buffer.Length);
int read = reader.Read (buffer, 0, chunk);
output.Write (buffer, 0, read);
int chunk = Math.Min (count, m_length);
int read = m_input.Read (m_buffer, m_pos, chunk);
count -= chunk;
}
}
}
output.Position = 0;
return output;
m_pos += chunk;
m_length -= chunk;
if (0 == m_length)
yield return m_pos;
}
}
}
}
bool m_disposed = false;
protected override void Dispose (bool disposing)
{
if (!m_disposed)
{
if (m_input != null)
m_input.Dispose();
m_disposed = true;
}
}
}
internal class Bpr02Decompressor : BprDecompressor
{
public Bpr02Decompressor () : base (3) { }
}
internal class Bpr01Decompressor : BprDecompressor
{
public Bpr01Decompressor () : base (1) { }
}
}