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(DET): recognize archives with different entry record layouts.

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morkt 2018-12-19 03:24:28 +04:00
parent 1706a0dd86
commit 178b856511
1 changed files with 112 additions and 32 deletions
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144
ArcFormats/uGOS/ArcDET.cs
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@ -2,7 +2,7 @@
//! \date Mon Nov 09 00:16:53 2015
//! \brief μ-GameOperationSystem resource archive.
//
// Copyright (C) 2015 by morkt
// Copyright (C) 2015-2018 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
@ -27,12 +27,13 @@ using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using GameRes.Compression;
using GameRes.Utility;
namespace GameRes.Formats.uGOS
{
[Export(typeof(ArchiveFormat))]
public class PakOpener : ArchiveFormat
public class DetOpener : ArchiveFormat
{
public override string Tag { get { return "DET"; } }
public override string Description { get { return "μ-GameOperationSystem resource archive"; } }
@ -51,28 +52,12 @@ namespace GameRes.Formats.uGOS
using (var nme = VFS.OpenView (name_file))
using (var idx = VFS.OpenView (index_file))
{
int count = (int)(idx.MaxOffset / 0x14);
if (!IsSaneCount (count))
var reader = new DetIndexReader (file, name_file: nme, index_file: idx);
var dir = reader.ReadIndex (0x10);
if (null == dir)
dir = reader.ReadIndex (0x14);
if (null == dir)
return null;
uint idx_offset = 0;
var name_table = nme.View.ReadBytes (0, (uint)nme.MaxOffset);
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
int name_offset = idx.View.ReadInt32 (idx_offset);
if (name_offset < 0 || name_offset >= name_table.Length)
return null;
var name = Binary.GetCString (name_table, name_offset, name_table.Length - name_offset);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = idx.View.ReadUInt32 (idx_offset + 4);
entry.Size = idx.View.ReadUInt32 (idx_offset + 8);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
entry.UnpackedSize = idx.View.ReadUInt32 (idx_offset + 0x10);
entry.IsPacked = true;
dir.Add (entry);
idx_offset += 0x14;
}
return new ArcFile (file, this, dir);
}
}
@ -82,15 +67,8 @@ namespace GameRes.Formats.uGOS
var pent = entry as PackedEntry;
if (null == pent || !pent.IsPacked)
return base.OpenEntry (arc, entry);
var output = new byte[pent.UnpackedSize];
using (var input = arc.File.CreateStream (entry.Offset, entry.Size))
{
if (Unpack (input, output))
return new BinMemoryStream (output, entry.Name);
else
return base.OpenEntry (arc, entry);
}
var input = arc.File.CreateStream (entry.Offset, entry.Size);
return new PackedStream<RleDecompressor> (input);
}
bool Unpack (Stream input, byte[] output)
@ -126,4 +104,106 @@ namespace GameRes.Formats.uGOS
return true;
}
}
internal sealed class DetIndexReader
{
ArcView m_arc;
ArcView m_index;
byte[] m_names;
List<Entry> m_dir;
public DetIndexReader (ArcView arc_file, ArcView name_file, ArcView index_file)
{
m_arc = arc_file;
m_names = name_file.View.ReadBytes (0, (uint)name_file.MaxOffset);
m_index = index_file;
}
public List<Entry> ReadIndex (uint entry_size)
{
int count = (int)(m_index.MaxOffset / entry_size);
if (!ArchiveFormat.IsSaneCount (count))
return null;
if (null == m_dir)
m_dir = new List<Entry> (count);
else
m_dir.Clear();
uint idx_offset = 0;
for (int i = 0; i < count; ++i)
{
if (idx_offset + entry_size > m_index.MaxOffset)
return null;
int name_offset = m_index.View.ReadInt32 (idx_offset);
if (name_offset < 0 || name_offset >= m_names.Length)
return null;
var name = Binary.GetCString (m_names, name_offset, m_names.Length - name_offset);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Offset = m_index.View.ReadUInt32 (idx_offset + 4);
entry.Size = m_index.View.ReadUInt32 (idx_offset + 8);
if (!entry.CheckPlacement (m_arc.MaxOffset))
return null;
entry.IsPacked = true;
if (entry_size >= 0x14)
entry.UnpackedSize = m_index.View.ReadUInt32 (idx_offset + 0x10);
if (name.EndsWith (".bmp.txt", StringComparison.OrdinalIgnoreCase))
entry.Type = "image";
m_dir.Add (entry);
idx_offset += entry_size;
}
return m_dir;
}
}
internal sealed class RleDecompressor : Decompressor
{
Stream m_input;
public override void Initialize (Stream input)
{
m_input = input;
}
protected override IEnumerator<int> Unpack ()
{
var frame = new byte[0x100];
int frame_pos = 0;
const int frame_mask = 0xFF;
for (;;)
{
int ctl = m_input.ReadByte();
if (-1 == ctl)
yield break;
if (0xFF != ctl)
{
m_buffer[m_pos++] = frame[frame_pos++ & frame_mask] = (byte)ctl;
if (0 == --m_length)
yield return m_pos;
}
else
{
ctl = m_input.ReadByte();
if (-1 == ctl)
yield break;
if (0xFF == ctl)
{
m_buffer[m_pos++] = frame[frame_pos++ & frame_mask] = 0xFF;
if (0 == --m_length)
yield return m_pos;
}
else
{
int offset = frame_pos - ((ctl >> 2) + 1);
int count = (ctl & 3) + 3;
while (count --> 0)
{
byte v = frame[offset++ & frame_mask];
m_buffer[m_pos++] = frame[frame_pos++ & frame_mask] = v;
if (0 == --m_length)
yield return m_pos;
}
}
}
}
}
}
}