mirror of
https://github.com/crskycode/GARbro.git
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259 lines
9.6 KiB
C#
259 lines
9.6 KiB
C#
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//! \file ArcCCT.cs
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//! \date Fri Jun 26 01:15:26 2015
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//! \brief Macromedia Director archive access 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 System.Linq;
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using System.Text;
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using GameRes.Utility;
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using ZLibNet;
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namespace GameRes.Formats.Selen
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{
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[Export(typeof(ArchiveFormat))]
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public class CctOpener : ArchiveFormat
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{
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public override string Tag { get { return "CCT"; } }
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public override string Description { get { return "Macromedia Director resource archive"; } }
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public override uint Signature { get { return 0x52494658; } } // 'XFIR'
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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 CctOpener ()
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{
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Extensions = new string[] { "cct", "dcr" };
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}
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public override ArcFile TryOpen (ArcView file)
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{
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uint id = file.View.ReadUInt32 (8);
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if (id != 0x46474443 && id != 0x4647444D) // 'CDGF' || 'MDGF'
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return null;
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var reader = new CctReader (file);
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var dir = reader.ReadIndex();
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if (null != dir)
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{
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var arc = new ArcFile (file, this, dir);
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SetEntryTypes (arc);
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return arc;
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}
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return null;
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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 input = arc.File.CreateStream (entry.Offset, entry.Size);
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var packed_entry = entry as PackedEntry;
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if (null == packed_entry || !packed_entry.IsPacked)
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return input;
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else
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return new ZLibStream (input, CompressionMode.Decompress);
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}
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private void SetEntryTypes (ArcFile arc)
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{
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foreach (var entry in arc.Dir.OrderBy (x => x.Offset))
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{
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if (entry.Name.EndsWith (".edim"))
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entry.Type = DetectEdimType (arc, entry);
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else if (entry.Name.EndsWith (".bitd"))
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entry.Type = "image";
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else if (entry.Name.EndsWith (".xmed"))
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entry.Type = "script";
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}
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}
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private string DetectEdimType (ArcFile arc, Entry entry)
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{
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using (var input = OpenEntry (arc, entry))
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{
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uint signature = (uint)input.ReadByte() << 24;
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signature |= (uint)input.ReadByte() << 16;
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signature |= (uint)input.ReadByte() << 8;
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signature |= (byte)input.ReadByte();
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if (0xffd8ffe0 == signature)
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return "image";
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uint real_size = (entry as PackedEntry).UnpackedSize;
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if (signature > 0xffff || signature+4 > real_size)
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return "";
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var header = new byte[signature+0x10];
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if (header.Length != input.Read (header, 0, header.Length))
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return "";
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if (0xff == header[signature])
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return "audio";
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return "";
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}
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}
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}
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internal class CctReader
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{
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ArcView m_file;
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long m_offset;
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public CctReader (ArcView file)
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{
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m_file = file;
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m_offset = 0x0C;
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}
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byte[] m_size_buffer = new byte[10];
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public List<Entry> ReadIndex ()
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{
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uint section_size = ReadSectionSize ("Fver");
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m_offset += section_size;
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section_size = ReadSectionSize ("Fcdr");
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/*
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int Mcdr_size;
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var Mcdr = ZlibUnpack (m_offset, section_size, out Mcdr_size);
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*/
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m_offset += section_size;
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uint abmp_size = ReadSectionSize ("ABMP");
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int max_count = m_file.View.Read (m_offset, m_size_buffer, 0, Math.Min (10, abmp_size));
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int size_offset = 0;
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ReadValue (m_size_buffer, ref size_offset, max_count);
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max_count -= size_offset;
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int bmp_unpacked_size = (int)ReadValue (m_size_buffer, ref size_offset, max_count);
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m_offset += size_offset;
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abmp_size -= (uint)size_offset;
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int index_size;
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var index = ZlibUnpack (m_offset, abmp_size, out index_size, bmp_unpacked_size);
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m_offset += abmp_size;
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section_size = ReadSectionSize ("FGEI");
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if (0 != section_size)
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throw new NotSupportedException();
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int index_offset = 0;
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ReadValue (index, ref index_offset, index_size-index_offset);
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ReadValue (index, ref index_offset, index_size-index_offset);
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int entry_count = (int)ReadValue (index, ref index_offset, index_size-index_offset);
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if (entry_count <= 0 || entry_count > 0xfffff)
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return null;
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var type_buf = new char[4];
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var dir = new List<Entry> (entry_count);
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for (int i = 0; i < entry_count; ++i)
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{
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uint id = ReadValue (index, ref index_offset, index_size-index_offset);
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uint offset = ReadValue (index, ref index_offset, index_size-index_offset);
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uint size = ReadValue (index, ref index_offset, index_size-index_offset);
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uint unpacked_size = ReadValue (index, ref index_offset, index_size-index_offset);
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uint flag = ReadValue (index, ref index_offset, index_size-index_offset);
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if (index_size-index_offset < 4)
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return null;
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uint type_id = LittleEndian.ToUInt32 (index, index_offset);
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index_offset += 4;
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if (0 == type_id || uint.MaxValue == offset)
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continue;
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Encoding.ASCII.GetChars (index, index_offset-4, 4, type_buf, 0);
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var entry = new PackedEntry
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{
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Name = CreateName (id, type_buf),
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Offset = (long)m_offset + offset,
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Size = size,
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UnpackedSize = unpacked_size,
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IsPacked = 0 == flag,
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};
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if (entry.CheckPlacement (m_file.MaxOffset))
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{
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dir.Add (entry);
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}
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}
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return dir;
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}
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string CreateName (uint id, char[] type_buf)
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{
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Array.Reverse (type_buf);
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int t = 3;
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while (t >= 0 && ' ' == type_buf[t])
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t--;
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if (t >= 0)
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{
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string ext = new string (type_buf, 0, t+1);
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return string.Format ("{0:X8}.{1}", id, ext.ToLowerInvariant());
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}
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else
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return id.ToString ("X8");
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}
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byte[] ZlibUnpack (long offset, uint size, out int actual_size, int unpacked_size_hint = 0)
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{
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using (var input = m_file.CreateStream (offset, size))
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using (var zstream = new ZLibStream (input, CompressionMode.Decompress))
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using (var mem = new MemoryStream (unpacked_size_hint))
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{
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zstream.CopyTo (mem);
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actual_size = (int)mem.Length;
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return mem.GetBuffer();
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}
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}
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uint ReadSectionSize (string id_str)
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{
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uint id = ConvertId (id_str);
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if (id != m_file.View.ReadUInt32 (m_offset))
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throw new InvalidFormatException();
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m_offset += 4;
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if (5 != m_file.View.Read (m_offset, m_size_buffer, 0, 5))
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throw new InvalidFormatException();
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int off_count = 0;
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uint size = ReadValue (m_size_buffer, ref off_count, 5);
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m_offset += off_count;
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return size;
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}
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static uint ReadValue (byte[] buffer, ref int offset, int length)
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{
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uint n = 0;
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for (int off_count = 0; off_count < length; ++off_count)
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{
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uint bits = buffer[offset++];
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n = (n << 7) | (bits & 0x7F);
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if (0 == (bits & 0x80))
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return n;
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}
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throw new InvalidFormatException();
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}
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static uint ConvertId (string id)
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{
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if (id.Length != 4)
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throw new ArgumentException ("Invalid section id");
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uint n = 0;
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for (int i = 0; i < 4; ++i)
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n = (n << 8) | (byte)id[i];
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return n;
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}
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}
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}
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