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https://github.com/libretro/scummvm.git
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90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef MADS_COMPRESSION_H
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#define MADS_COMPRESSION_H
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#include "common/scummsys.h"
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#include "common/endian.h"
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#include "common/memstream.h"
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#include "common/stream.h"
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#include "mads/mads.h"
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namespace MADS {
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enum CompressionType { COMPRESS_NONE = 0, COMPRESS_FAB = 1 };
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struct MadsPackEntry {
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public:
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CompressionType _type;
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byte _priority;
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uint32 _size;
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uint32 _compressedSize;
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byte *_data;
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};
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class MadsPack {
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private:
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MadsPackEntry *_items;
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int _count;
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int _dataOffset;
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void initialise(Common::SeekableReadStream *stream);
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public:
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static bool isCompressed(Common::SeekableReadStream *stream);
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MadsPack(Common::SeekableReadStream *stream);
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MadsPack(const Common::String &resourceName, MADSEngine *_vm);
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~MadsPack();
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int getCount() const { return _count; }
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MadsPackEntry &getItem(int index) const {
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assert(index < _count);
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return _items[index]; }
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MadsPackEntry &operator[](int index) const {
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assert(index < _count);
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return _items[index];
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}
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Common::MemoryReadStream *getItemStream(int index) {
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assert(index < _count);
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return new Common::MemoryReadStream(_items[index]._data, _items[index]._size,
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DisposeAfterUse::NO);
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}
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int getDataOffset() const { return _dataOffset; }
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};
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class FabDecompressor {
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private:
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int _bitsLeft;
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uint32 _bitBuffer;
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const byte *_srcData, *_srcP;
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int _srcSize;
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int getBit();
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public:
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void decompress(const byte *srcData, int srcSize, byte *destData, int destSize);
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};
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} // End of namespace MADS
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#endif
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