diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index d924c796..aae48b12 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -71,6 +71,7 @@
WidgetAZ.xaml
+
diff --git a/ArcFormats/Circus/ArcValkyrieComplex.cs b/ArcFormats/Circus/ArcValkyrieComplex.cs
new file mode 100644
index 00000000..4ffac4b8
--- /dev/null
+++ b/ArcFormats/Circus/ArcValkyrieComplex.cs
@@ -0,0 +1,323 @@
+//! \file ArcValkyrieComplex.cs
+//! \date Sat Apr 23 14:58:33 2016
+//! \brief Valkyrie Complex resource archives.
+//
+// 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;
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Linq;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Circus
+{
+ internal class VcPakFile : ArcFile
+ {
+ public readonly byte Key;
+
+ public VcPakFile (ArcView arc, ArchiveFormat impl, ICollection dir, byte key)
+ : base (arc, impl, dir)
+ {
+ Key = key;
+ }
+ }
+
+ [Export(typeof(ArchiveFormat))]
+ public class VcPakOpener : ArchiveFormat
+ {
+ public override string Tag { get { return "PAK/VC"; } }
+ public override string Description { get { return "Valkyrie Complex resource archive"; } }
+ public override uint Signature { get { return 0x62827582; } } // 'ＶＣ'
+ public override bool IsHierarchic { get { return true; } }
+ public override bool CanCreate { get { return false; } }
+
+ static readonly byte[] TrialSignature = Encodings.cp932.GetBytes ("ＶＣ体験版");
+ static readonly byte[] RetailSignature = Encodings.cp932.GetBytes ("ＶＣ製品版");
+
+ public VcPakOpener ()
+ {
+ Extensions = new string[] { "pak" };
+ }
+
+ public override ArcFile TryOpen (ArcView file)
+ {
+ var signature = file.View.ReadBytes (0, 10);
+ bool is_trial = signature.SequenceEqual (TrialSignature);
+ if (!is_trial && !signature.SequenceEqual (RetailSignature))
+ return null;
+ byte key = (byte)(is_trial ? 0x38 : 0x58);
+ uint ukey = (uint)key << 8 | key;
+ ukey |= ukey << 16;
+ int count = (int)(file.View.ReadUInt32 (0x18) ^ ukey);
+ if (!IsSaneCount (count))
+ return null;
+ uint index_size = file.View.ReadUInt32 (0x1C) ^ ukey;
+ if (index_size >= file.MaxOffset)
+ return null;
+ var index = file.View.ReadBytes (0x20, index_size);
+ for (int i = 0; i < index.Length; ++i)
+ index[i] ^= key;
+
+ int index_pos = 4;
+ int names_pos = count * 0x10;
+ var dir = new List (count);
+ for (uint i = 0; i < count; ++i)
+ {
+ int name_length = LittleEndian.ToInt32 (index, index_pos);
+ var name = Encodings.cp932.GetString (index, names_pos, name_length);
+ var entry = FormatCatalog.Instance.Create (name);
+ entry.Offset = LittleEndian.ToUInt32 (index, index_pos+4);
+ entry.Size = LittleEndian.ToUInt32 (index, index_pos+8);
+ if (!entry.CheckPlacement (file.MaxOffset))
+ return null;
+ if (name.EndsWith (".cps", StringComparison.InvariantCultureIgnoreCase))
+ entry.Type = "image";
+ dir.Add (entry);
+ index_pos += 0x10;
+ names_pos += name_length + 1;
+ }
+ return new VcPakFile (file, this, dir, (byte)(is_trial ? 0x25 : 0x24));
+ }
+
+ public override Stream OpenEntry (ArcFile arc, Entry entry)
+ {
+ var vcarc = arc as VcPakFile;
+ if (null == vcarc)
+ return base.OpenEntry (arc, entry);
+ var data = vcarc.File.View.ReadBytes (entry.Offset, entry.Size);
+ for (int i = 0; i < data.Length; ++i)
+ data[i] ^= vcarc.Key;
+ if (entry.Name.EndsWith (".cs", StringComparison.InvariantCultureIgnoreCase))
+ {
+ for (int i = 0; i < data.Length; ++i)
+ --data[i];
+ }
+ else if (entry.Name.EndsWith (".cps", StringComparison.InvariantCultureIgnoreCase))
+ {
+ data = UnpackCps (data);
+ }
+ return new MemoryStream (data);
+ }
+
+ byte[] UnpackCps (byte[] input)
+ {
+ uint unpacked_size = (LittleEndian.ToUInt32 (input, 0) ^ 0xA415FCF) & 0xFFFFFFF;
+ int type = input[3] >> 4;
+ if (type > 3)
+ return input;
+ DecryptCps (input);
+ var output = new byte[unpacked_size];
+ switch (type)
+ {
+ case 0: Buffer.BlockCopy (input, 4, output, 0, output.Length); break;
+ case 1: UnpackV1 (input, output); break;
+ case 2: UnpackV2 (input, output); break;
+ case 3: UnpackV3 (input, output); break;
+ }
+ return output;
+ }
+
+ static void DecryptCps (byte[] input)
+ {
+ int length = input.Length;
+ if (length < 0x308)
+ return;
+
+ input[4] ^= input[length - 1];
+ byte key = 0xFF;
+
+ length -= 8;
+ int a = 8 + length - key;
+ int b = 8 + length / 0x200 + key;
+ byte t = input[a];
+ input[a] = input[b];
+ input[b] = t;
+
+ a = 8 + key + 2 * (length / 0x200);
+ b = 8 + length - 2 * key;
+ t = input[a];
+ input[a] = input[b];
+ input[b] = t;
+ }
+
+ static void UnpackV1 (byte[] input, byte[] output)
+ {
+ int dst = 0;
+ using (var mem = new MemoryStream (input, 4, input.Length-4))
+ using (var bits = new ReverseBitStream (mem))
+ {
+ while (dst < output.Length)
+ {
+ int count = bits.GetBits (4);
+ if (0 != bits.GetNextBit())
+ {
+ for (int i = 0; i <= count; ++i)
+ output[dst++] = (byte)bits.GetBits (8);
+ }
+ else
+ {
+ byte b = (byte)bits.GetBits (8);
+ for (int i = 0; i < count; ++i)
+ output[dst++] = b;
+ }
+ }
+ }
+ }
+
+ static void UnpackV2 (byte[] input, byte[] output)
+ {
+ output[output.Length-1] = input[36];
+ using (var mem = new MemoryStream (input, 38, input.Length-38))
+ using (var bits = new ReverseBitStream (mem))
+ {
+ for (int dst = 0; dst < output.Length; dst += 2)
+ {
+ if (0 != bits.GetNextBit())
+ {
+ output[dst+1] = (byte)bits.GetBits (8);
+ output[dst] = (byte)bits.GetBits (8);
+ }
+ else
+ {
+ int j;
+ for (j = 0; j < 30; j += 2)
+ {
+ if (0 != bits.GetNextBit())
+ break;
+ }
+ output[dst] = input[4 + j];
+ output[dst+1] = input[5 + j];
+ }
+ }
+ }
+ }
+
+ static void UnpackV3 (byte[] input, byte[] output)
+ {
+ int src = 4;
+ int dst = 0;
+ if (output.Length <= 128)
+ {
+ Buffer.BlockCopy (input, src, output, dst, output.Length);
+ return;
+ }
+ Buffer.BlockCopy (input, src, output, dst, 128);
+ src += 128;
+ dst += 128;
+ using (var mem = new MemoryStream (input, src, input.Length-src))
+ using (var bits = new ReverseBitStream (mem))
+ {
+ while (dst < output.Length)
+ {
+ if (0 != bits.GetNextBit())
+ {
+ int offset = bits.GetBits (7) + 1;
+ int count = bits.GetBits (4) + 2;
+ Binary.CopyOverlapped (output, dst - offset, dst, count);
+ dst += count;
+ }
+ else
+ {
+ output[dst++] = (byte)bits.GetBits (8);
+ }
+ }
+ }
+ }
+ }
+
+ internal class ReverseBitStream : BitStream, IBitStream
+ {
+ public ReverseBitStream (Stream file, bool leave_open = false)
+ : base (file, leave_open)
+ {
+ }
+
+ public int GetBits (int count)
+ {
+ while (m_cached_bits < count)
+ {
+ int b = m_input.ReadByte();
+ if (-1 == b)
+ return -1;
+ m_bits |= b << m_cached_bits;
+ m_cached_bits += 8;
+ }
+ int value = 0;
+ m_cached_bits -= count;
+ while (count --> 0)
+ {
+ value |= (m_bits & 1) << count;
+ m_bits >>= 1;
+ }
+ return value;
+ }
+
+ public int GetNextBit ()
+ {
+ return GetBits (1);
+ }
+ }
+
+ [Export(typeof(ArchiveFormat))]
+ public class VcPacOpener : ArchiveFormat
+ {
+ public override string Tag { get { return "PAC/VC"; } }
+ public override string Description { get { return "Valkyrie Complex resource archive"; } }
+ public override uint Signature { get { return 1; } }
+ public override bool IsHierarchic { get { return false; } }
+ public override bool CanCreate { get { return false; } }
+
+ public VcPacOpener ()
+ {
+ Extensions = new string[] { "pac" };
+ }
+
+ public override ArcFile TryOpen (ArcView file)
+ {
+ int count = file.View.ReadInt32 (4);
+ if (!IsSaneCount (count))
+ return null;
+ uint base_offset = file.View.ReadUInt32 (8);
+ uint file_size = file.View.ReadUInt32 (0xC);
+ if (base_offset >= file.MaxOffset || file_size != file.MaxOffset)
+ return null;
+
+ uint index_offset = 0x20;
+ var dir = new List (count);
+ for (int i = 0; i < count; ++i)
+ {
+ var name = file.View.ReadString (index_offset, 0x20);
+ var entry = FormatCatalog.Instance.Create (name);
+ index_offset += 0x20;
+ entry.Size = file.View.ReadUInt32 (index_offset);
+ entry.Offset = file.View.ReadUInt32 (index_offset+4) + base_offset;
+ if (!entry.CheckPlacement (file.MaxOffset))
+ return null;
+ index_offset += 0x18;
+ dir.Add (entry);
+ }
+ return new ArcFile (file, this, dir);
+ }
+ }
+}
diff --git a/supported.html b/supported.html
index c9a78f0b..ddb9abb9 100644
--- a/supported.html
+++ b/supported.html
@@ -792,6 +792,10 @@ Shiawase na Ohime-sama
| *.nwa | - | No |
| *.g00 | - | No |
| *.pdt | PDT10 | No |
+*.pak
*.pac | ＶＣ製品版
\x01\x00\x00\x00 | No | Circus |
+Valkyrie Complex
+ |
+| *.cps | - | No |
Non-encrypted only