implemented REC engine archives.

ArcFormats/ArcFormats.csproj

@@ -277,6 +277,7 @@
     <Compile Include="Seraphim\ArcVoice.cs" />
     <Compile Include="ShiinaRio\ArcWARC1.0.cs" />
     <Compile Include="ShiinaRio\ImageCHD.cs" />
+    <Compile Include="Speed\ArcARC.cs" />
     <Compile Include="StudioSakura\ArcDAT.cs" />
     <Compile Include="Silky\ImageGRD.cs" />
     <Compile Include="Slg\ArcSPD.cs" />

ArcFormats/Speed/ArcARC.cs

@@ -0,0 +1,136 @@
+//! \file       ArcARC.cs
+//! \date       2018 Oct 09
+//! \brief      Speed resource archive.
+//
+// Copyright (C) 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
+// 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.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Speed
+{
+    [Export(typeof(ArchiveFormat))]
+    public class ArcOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "ARC/REC"; } }
+        public override string Description { get { return "REC engine resource archive"; } }
+        public override uint     Signature { get { return 0xFF; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = file.View.ReadInt32 (8);
+            if (!IsSaneCount (count))
+                return null;
+            uint rec_length = file.View.ReadUInt32 (0);
+            if (rec_length < 0x10 || rec_length > 0x200)
+                return null;
+            int rec_count = file.View.ReadInt32 (4);
+            if (rec_count < count || rec_length * rec_count >= file.MaxOffset)
+                return null;
+            long index_offset = 0x10;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                var name = file.View.ReadString (index_offset, rec_length);
+                var entry = Create<Entry> (name);
+                dir.Add (entry);
+                index_offset += rec_length;
+            }
+            index_offset = 0x10 + rec_length * (rec_count + 2);
+            rec_length = file.View.ReadUInt32 (index_offset);
+            rec_count = file.View.ReadInt32 (index_offset+4);
+            if (rec_length != 4 || count != file.View.ReadInt32 (index_offset+8))
+                return null;
+            index_offset += 0x10;
+            long data_offset = index_offset + rec_length * (rec_count + 2) + 4;
+            foreach (var entry in dir)
+            {
+                entry.Offset = data_offset + file.View.ReadUInt32 (index_offset);
+                if (entry.Type == "image")
+                    entry.Offset += 16;
+                else
+                    entry.Offset += 4;
+                if (entry.Offset > file.MaxOffset)
+                    return null;
+                index_offset += rec_length;
+            }
+            for (int i = 1; i < count; ++i)
+                dir[i-1].Size = (uint)(dir[i].Offset - 4 - dir[i-1].Offset);
+            dir[count-1].Size = (uint)(file.MaxOffset - dir[count-1].Offset);
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            uint size = arc.File.View.ReadUInt32 (entry.Offset-4);
+            return arc.File.CreateStream (entry.Offset, size, entry.Name);
+        }
+
+        public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
+        {
+            int width = arc.File.View.ReadInt32 (entry.Offset-16);
+            int height = arc.File.View.ReadInt32 (entry.Offset-12);
+            uint unpacked_size = arc.File.View.ReadUInt32 (entry.Offset-8);
+            using (var input = OpenEntry (arc, entry))
+            {
+                var pixels = new byte[unpacked_size];
+                LzUnpack (input, pixels);
+                var bitmap = BitmapSource.Create (width, height, ImageData.DefaultDpiX, ImageData.DefaultDpiY,
+                                                  PixelFormats.Bgra32, null, pixels, width * 4);
+                return new BitmapSourceDecoder (bitmap);
+            }
+        }
+
+        void LzUnpack (Stream input, byte[] output)
+        {
+            using (var bits = new MsbBitStream (input, true))
+            {
+                int dst = 0;
+                while (dst < output.Length)
+                {
+                    int ctl = bits.GetNextBit();
+                    if (-1 == ctl)
+                        break;
+                    if (0 == ctl)
+                    {
+                        output[dst++] = (byte)bits.GetBits (8);
+                    }
+                    else
+                    {
+                        int offset = bits.GetBits (8);
+                        int count = bits.GetBits (8);
+                        if (offset <= 0)
+                            break;
+                        Binary.CopyOverlapped (output, dst - offset, dst, count);
+                        dst += count;
+                    }
+                }
+            }
+        }
+    }
+}