/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef SCUMM_SMUSH_CODEC37_H
#define SCUMM_SMUSH_CODEC37_H

#include "common/scummsys.h"

namespace Scumm {

class SmushDeltaBlocksDecoder {
private:

	int32 _deltaSize;
	byte *_deltaBufs[2];
	byte *_deltaBuf;
	int16 *_offsetTable;
	int _curTable;
	uint16 _prevSeqNb;
	int _tableLastPitch;
	int _tableLastIndex;
	int32 _frameSize;
	int _width, _height;

public:
	SmushDeltaBlocksDecoder(int width, int height);
	~SmushDeltaBlocksDecoder();
protected:
	void makeTable(int, int);
	void proc1(byte *dst, const byte *src, int32, int, int, int, int16 *);
	void proc3WithFDFE(byte *dst, const byte *src, int32, int, int, int, int16 *);
	void proc3WithoutFDFE(byte *dst, const byte *src, int32, int, int, int, int16 *);
	void proc4WithFDFE(byte *dst, const byte *src, int32, int, int, int, int16 *);
	void proc4WithoutFDFE(byte *dst, const byte *src, int32, int, int, int, int16 *);
public:
	void decode(byte *dst, const byte *src);
};

} // End of namespace Scumm

#endif