limited implementation of RPGMV resources.

ArcFormats/RPGMaker/AudioRPGMV.cs

@@ -0,0 +1,57 @@
+//! \file       AudioRPGMV.cs
+//! \date       2018 Oct 14
+//! \brief      RPG Maker encrypted OGG audio.
+//
+// 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;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Linq;
+using GameRes.Utility;
+using NVorbis;
+
+namespace GameRes.Formats.RPGMaker
+{
+    [Export(typeof(AudioFormat))]
+    public sealed class RpgmvoAudio : AudioFormat
+    {
+        public override string         Tag { get { return "RPGMVO"; } }
+        public override string Description { get { return "RPG Maker audio format (Ogg/Vorbis)"; } }
+        public override uint     Signature { get { return 0x4D475052; } } // 'RPGMV'
+        public override bool      CanWrite { get { return false; } }
+
+        public override SoundInput TryOpen (IBinaryStream file)
+        {
+            var header = file.ReadHeader (0x14);
+            if (header[4] != 'V')
+                return null;
+            var key = RpgmvpFormat.DefaultKey;
+            for (int i = 0; i < 4; ++i)
+                header[0x10+i] ^= key[i];
+            if (!header.AsciiEqual (0x10, "OggS"))
+                return null;
+            var ogg = RpgmvDecryptor.DecryptStream (file, key);
+            return OggAudio.Instance.TryOpen (ogg);
+        }
+    }
+}

ArcFormats/RPGMaker/ImageRPGMV.cs

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+//! \file       ImageRPGMV.cs
+//! \date       2018 Oct 14
+//! \brief      RPG Maker encrypted PNG image.
+//
+// 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.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+
+namespace GameRes.Formats.RPGMaker
+{
+    internal class RpgmvpMetaData : ImageMetaData
+    {
+        public byte[]   Key;
+    }
+
+    [Export(typeof(ImageFormat))]
+    public class RpgmvpFormat : ImageFormat
+    {
+        public override string         Tag { get { return "RPGMVP"; } }
+        public override string Description { get { return "RPG Maker engine image format"; } }
+        public override uint     Signature { get { return 0x4D475052; } } // 'RPGMV'
+
+        internal static readonly byte[] DefaultKey = {
+            0x77, 0x4E, 0x46, 0x45, 0xFC, 0x43, 0x2F, 0x71, 0x47, 0x95, 0xA2, 0x43, 0xE5, 0x10, 0x13, 0xD8
+        };
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            var header = file.ReadHeader (0x14);
+            if (header[4] != 'V')
+                return null;
+            var key = DefaultKey;
+            for (int i = 0; i < 4; ++i)
+                header[0x10+i] ^= key[i];
+            if (!header.AsciiEqual (0x10, "\x89PNG"))
+                return null;
+            using (var png = RpgmvDecryptor.DecryptStream (file, key, true))
+            {
+                var info = Png.ReadMetaData (png);
+                if (null == info)
+                    return null;
+                return new RpgmvpMetaData {
+                    Width = info.Width,
+                    Height = info.Height,
+                    OffsetX = info.OffsetX,
+                    OffsetY = info.OffsetY,
+                    BPP = info.BPP,
+                    Key = key,
+                };
+            }
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            var meta = (RpgmvpMetaData)info;
+            using (var png = RpgmvDecryptor.DecryptStream (file, meta.Key, true))
+                return Png.Read (png, info);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("RpgmvpFormat.Write not implemented");
+        }
+    }
+
+    internal class RpgmvDecryptor
+    {
+        public static IBinaryStream DecryptStream (IBinaryStream input, byte[] key, bool leave_open = false)
+        {
+            input.Position = 0x10;
+            var header = input.ReadBytes (key.Length);
+            for (int i = 0; i < key.Length; ++i)
+                header[i] ^= key[i];
+            var result = new PrefixStream (header, new StreamRegion (input.AsStream, 0x20, leave_open));
+            return new BinaryStream (result, input.Name);
+        }
+    }
+}