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implemented MEGU engine resources.
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morkt
184
ArcFormats/ArcMGD.cs
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184
ArcFormats/ArcMGD.cs
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//! \file ArcMGD.cs
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//! \date Sun May 10 18:11:01 2015
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//! \brief MEGU archives implementation.
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//
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// Copyright (C) 2015 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using GameRes.Utility;
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// MEGU
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// Masys Enhanced Game Unit
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namespace GameRes.Formats.Megu
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{
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[Export(typeof(ArchiveFormat))]
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public class MgdOpener : ArchiveFormat
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{
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public override string Tag { get { return "MGD"; } }
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public override string Description { get { return "Masys resource archive"; } }
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public override uint Signature { get { return 0; } }
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public override bool IsHierarchic { get { return false; } }
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public override bool CanCreate { get { return false; } }
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internal static readonly string Key = "Powerd by Masys";
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public override ArcFile TryOpen (ArcView file)
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{
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uint signature = file.View.ReadUInt32 (0);
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if (0x44474d != (signature & 0xffffff)) // 'MGD'
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return null;
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int count = file.View.ReadInt16 (0x20);
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if (count <= 0)
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return null;
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int flag = file.View.ReadUInt16 (3);
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var dir = new List<Entry> (count);
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int index_offset = 0x22;
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byte[] name_buf = new byte[16];
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for (uint i = 0; i < count; ++i)
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{
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int name_size = file.View.ReadByte (index_offset+1);
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if (0 == name_size)
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return null;
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if (name_size > name_buf.Length)
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Array.Resize (ref name_buf, name_size);
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file.View.Read (index_offset+2, name_buf, 0, (uint)name_size);
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if (100 == flag)
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Decrypt (name_buf, 0, name_size);
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string name = Encodings.cp932.GetString (name_buf, 0, name_size);
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index_offset += 2 + name_size;
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uint offset = file.View.ReadUInt32 (index_offset+4);
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var entry = AutoEntry.Create (file, offset, name);
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entry.Size = file.View.ReadUInt32 (index_offset);
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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index_offset += 8;
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}
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return new ArcFile (file, this, dir);
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}
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internal static void Decrypt (byte[] buffer, int offset, int length)
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{
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for (int i = 0; i < length; ++i)
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{
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buffer[offset+i] ^= (byte)Key[i%0xf];
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}
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}
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}
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internal class MgsEntry : Entry
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{
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public ushort Channels;
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public uint SamplesPerSecond;
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public ushort BitsPerSample;
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}
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[Export(typeof(ArchiveFormat))]
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public class MgsOpener : ArchiveFormat
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{
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public override string Tag { get { return "MGS"; } }
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public override string Description { get { return "Masys audio resources archive"; } }
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public override uint Signature { get { return 0; } }
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public override bool IsHierarchic { get { return false; } }
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public override bool CanCreate { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
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{
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uint signature = file.View.ReadUInt32 (0);
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if (0x53474d != (signature & 0xffffff)) // 'MGS'
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return null;
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int count = file.View.ReadInt16 (0x20);
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if (count <= 0)
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return null;
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int flag = file.View.ReadUInt16 (3);
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var dir = new List<Entry> (count);
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int index_offset = 0x22;
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byte[] name_buf = new byte[16];
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for (uint i = 0; i < count; ++i)
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{
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ushort channels = file.View.ReadUInt16 (index_offset+1);
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uint rate = file.View.ReadUInt32 (index_offset+3);
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ushort bits = file.View.ReadUInt16 (index_offset+7);
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int name_size = file.View.ReadByte (index_offset+9);
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if (0 == name_size)
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return null;
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if (name_size > name_buf.Length)
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Array.Resize (ref name_buf, name_size);
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file.View.Read (index_offset+10, name_buf, 0, (uint)name_size);
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if (100 == flag)
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MgdOpener.Decrypt (name_buf, 0, name_size);
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index_offset += 10 + name_size;
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var entry = new MgsEntry
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{
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Name = Encodings.cp932.GetString (name_buf, 0, name_size) + ".wav",
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Type = "audio",
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Size = file.View.ReadUInt32 (index_offset),
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Offset = file.View.ReadUInt32 (index_offset + 4),
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Channels = channels,
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SamplesPerSecond = rate,
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BitsPerSample = bits,
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};
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if (!entry.CheckPlacement (file.MaxOffset))
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return null;
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dir.Add (entry);
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index_offset += 8;
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}
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return new ArcFile (file, this, dir);
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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var went = entry as MgsEntry;
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if (null == went)
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return arc.File.CreateStream (entry.Offset, entry.Size);
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var riff = new byte[0x2c];
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using (var buf = new MemoryStream (riff))
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using (var wav = new BinaryWriter (buf))
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{
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wav.Write (0x46464952); // 'RIFF'
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uint total_size = 0x2c - 8 + entry.Size;
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wav.Write (total_size);
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wav.Write (0x45564157); // 'WAVE'
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wav.Write (0x20746d66); // 'fmt '
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wav.Write (0x10);
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wav.Write ((ushort)1);
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wav.Write (went.Channels);
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wav.Write (went.SamplesPerSecond);
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uint bps = went.SamplesPerSecond * went.Channels * went.BitsPerSample / 8;
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wav.Write (bps);
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wav.Write ((ushort)2);
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wav.Write (went.BitsPerSample);
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wav.Write (0x61746164); // 'data'
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wav.Write (went.Size);
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wav.Flush ();
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var input = arc.File.CreateStream (entry.Offset, entry.Size);
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return new PrefixStream (riff, input);
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}
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}
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}
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}
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