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(Valkyria): Support V1 resource archive

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Crsky
2025-04-14 02:38:00 +08:00
parent c6569517a6
commit 24262179f3
1 changed files with 78 additions and 0 deletions
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78
ArcFormats/Valkyria/ArcDAT.cs
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@@ -23,8 +23,11 @@
// IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;
namespace GameRes.Formats.Valkyria
{
@@ -40,6 +43,8 @@ namespace GameRes.Formats.Valkyria
public override ArcFile TryOpen (ArcView file)
{
uint index_size = file.View.ReadUInt32 (0);
if (0 == index_size)
return TryOpenV1 (file);
if (0 == index_size || index_size >= file.MaxOffset)
return null;
int count = (int)index_size / 0x10C;
@@ -62,5 +67,78 @@ namespace GameRes.Formats.Valkyria
}
return new ArcFile (file, this, dir);
}
private ArcFile TryOpenV1(ArcView file)
{
var index_size = file.View.ReadUInt32 (4);
if (0 == index_size || index_size >= file.MaxOffset)
return null;
int count = (int)index_size / 0x10C;
if (index_size != (uint)count * 0x10Cu || !IsSaneCount (count))
return null;
var dir_path = Path.GetDirectoryName (file.Name);
if (null == dir_path)
return null;
var arc_key = ReadArcKey (dir_path);
if (null == arc_key)
return null;
uint index_offset = 8;
long base_offset = index_offset + index_size;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = file.View.ReadString (index_offset, 0x104);
var key = GetEntryKey (arc_key, file.View.ReadBytes (index_offset, 0x104));
index_offset += 0x104;
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = base_offset + (file.View.ReadUInt32 (index_offset) ^ key);
entry.Size = file.View.ReadUInt32 (index_offset + 4) ^ key;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
index_offset += 8;
dir.Add (entry);
}
return new ArcFile (file, this, dir);
}
private static byte[] ReadArcKey (string dir_path)
{
var file_path = Path.Combine (dir_path, "system.dat");
if (!File.Exists (file_path))
return null;
var info = new byte[260];
using (var fs = File.OpenRead (file_path))
{
fs.Position = 0x10E;
fs.Read (info, 0, 260);
fs.Close ();
}
var key = new byte[4];
var len = info.TakeWhile (x => x != 0).Count ();
for (int i = len, j = 0; i != 0; i--)
{
key[j] += info[i];
if (++j == 4)
j = 0;
}
return key;
}
private static uint GetEntryKey (byte[] arc_key, byte[] name)
{
var key = new byte[4];
var len = name.TakeWhile (x => x != 0).Count ();
for (int i = len, j = 0; i != 0; i--)
{
key[j] += name[i];
if (++j == 4)
j = 0;
}
key[0] += arc_key[3];
key[1] += arc_key[2];
key[2] += arc_key[1];
key[3] += arc_key[0];
return BitConverter.ToUInt32 (key, 0);
}
}
}