diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index e8cb6cb4..7b2e35f8 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -476,6 +476,7 @@
+
diff --git a/ArcFormats/Youkai/ArcDAT.cs b/ArcFormats/Youkai/ArcDAT.cs
new file mode 100644
index 00000000..81fff414
--- /dev/null
+++ b/ArcFormats/Youkai/ArcDAT.cs
@@ -0,0 +1,161 @@
+//! \file ArcDAT.cs
+//! \date Wed Jan 04 07:14:13 2017
+//! \brief Youkai Tamanokoshi resource archive.
+//
+// Copyright (C) 2017 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;
+
+namespace GameRes.Formats.Youkai
+{
+ [Export(typeof(ArchiveFormat))]
+ public class GrpDatOpener : ArchiveFormat
+ {
+ public override string Tag { get { return "DAT/YOUKAI/1"; } }
+ public override string Description { get { return "Youkai Tamanokoshi resource archive"; } }
+ public override uint Signature { get { return 0; } }
+ public override bool IsHierarchic { get { return false; } }
+ public override bool CanWrite { get { return false; } }
+
+ public override ArcFile TryOpen (ArcView file)
+ {
+ if (!file.Name.EndsWith (".dat", StringComparison.InvariantCultureIgnoreCase))
+ return null;
+ int count = file.View.ReadInt32 (0);
+ if (!IsSaneCount (count) || 0 != file.View.ReadInt32 (4))
+ return null;
+ uint index_offset = 0x20;
+ uint data_offset = index_offset + (uint)count * 0x110;
+ if (data_offset >= file.MaxOffset)
+ return null;
+
+ var dir = new List (count);
+ for (int i = 0; i < count; ++i)
+ {
+ var name = file.View.ReadString (index_offset, 0x100);
+ if (0 == name.Length)
+ return null;
+ index_offset += 0x100;
+ var entry = FormatCatalog.Instance.Create (name);
+ entry.Size = file.View.ReadUInt32 (index_offset);
+ entry.Offset = file.View.ReadUInt32 (index_offset+4);
+ if (entry.Offset < data_offset || !entry.CheckPlacement (file.MaxOffset))
+ return null;
+ dir.Add (entry);
+ index_offset += 0x10;
+ }
+ return new ArcFile (file, this, dir);
+ }
+
+ public override Stream OpenEntry (ArcFile arc, Entry entry)
+ {
+ if (!arc.File.View.AsciiEqual (entry.Offset, "ACMPRS03"))
+ return base.OpenEntry (arc, entry);
+ uint packed_size = arc.File.View.ReadUInt32 (entry.Offset+0x14);
+ var input = arc.File.CreateStream (entry.Offset+0x24, packed_size);
+ return new LzssStream (input);
+ }
+ }
+
+ [Export(typeof(ArchiveFormat))]
+ public class SoundDatOpener : ArchiveFormat
+ {
+ public override string Tag { get { return "DAT/YOUKAI/2"; } }
+ public override string Description { get { return "Youkai Tamanokoshi audio archive"; } }
+ public override uint Signature { get { return 0; } }
+ public override bool IsHierarchic { get { return false; } }
+ public override bool CanWrite { get { return false; } }
+
+ public override ArcFile TryOpen (ArcView file)
+ {
+ if (!file.Name.EndsWith (".dat", StringComparison.InvariantCultureIgnoreCase))
+ return null;
+ int count = file.View.ReadInt32 (0);
+ if (!IsSaneCount (count))
+ return null;
+ uint current_offset = 4;
+ var dir = new List (count);
+ for (int i = 0; i < count; ++i)
+ {
+ if (current_offset >= file.MaxOffset-0x104)
+ return null;
+ var name = file.View.ReadString (current_offset, 0x100);
+ if (0 == name.Length)
+ return null;
+ uint size = file.View.ReadUInt32 (current_offset+0x100);
+ current_offset += 0x104;
+ var entry = FormatCatalog.Instance.Create (name);
+ entry.Offset = current_offset;
+ entry.Size = size;
+ if (!entry.CheckPlacement (file.MaxOffset))
+ return null;
+ dir.Add (entry);
+ current_offset += size;
+ }
+ if (current_offset != file.MaxOffset)
+ return null;
+ return new ArcFile (file, this, dir);
+ }
+ }
+
+ [Export(typeof(ArchiveFormat))]
+ public class VoiceDatOpener : ArchiveFormat
+ {
+ public override string Tag { get { return "DAT/YOUKAI/3"; } }
+ public override string Description { get { return "Youkai Tamanokoshi audio archive"; } }
+ public override uint Signature { get { return 0; } }
+ public override bool IsHierarchic { get { return false; } }
+ public override bool CanWrite { get { return false; } }
+
+ public override ArcFile TryOpen (ArcView file)
+ {
+ if (!file.Name.EndsWith (".dat", StringComparison.InvariantCultureIgnoreCase))
+ return null;
+ uint data_offset = file.View.ReadUInt32 (0);
+ int count = file.View.ReadInt32 (4);
+ uint index_offset = 8;
+ uint index_size = (uint)count * 0x108;
+ if (!IsSaneCount (count) || index_offset + index_size > data_offset)
+ return null;
+ var dir = new List (count);
+ for (int i = 0; i < count; ++i)
+ {
+ var name = file.View.ReadString (index_offset, 0x100);
+ if (0 == name.Length)
+ return null;
+ index_offset += 0x100;
+ var entry = FormatCatalog.Instance.Create (name);
+ entry.Size = file.View.ReadUInt32 (index_offset);
+ entry.Offset = file.View.ReadUInt32 (index_offset+4);
+ if (!entry.CheckPlacement (file.MaxOffset))
+ return null;
+ dir.Add (entry);
+ index_offset += 8;
+ }
+ return new ArcFile (file, this, dir);
+ }
+ }
+}