codec47.h

/* 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_CODEC_47_H
#define SCUMM_SMUSH_CODEC_47_H

#include "common/scummsys.h"

namespace Scumm {

class SmushDeltaGlyphsDecoder {
private:

    int32 _deltaSize;
    byte *_deltaBufs[2];
    byte *_deltaBuf;
    byte *_curBuf;
    int32 _prevSeqNb;
    int _lastTableWidth;
    const byte *_dSrc, *_paramPtr;
    int _dPitch;
    int32 _offset1, _offset2;
    byte *_tableBig;
    byte *_tableSmall;
    int16 _table[256];
    int32 _frameSize;
    int _width, _height;

    void makeTablesInterpolation(int param);
    void makeCodecTables(int width);
    void level1(byte *d_dst);
    void level2(byte *d_dst);
    void level3(byte *d_dst);
    void decode2(byte *dst, const byte *src, int width, int height, const byte *param_ptr);

public:
    SmushDeltaGlyphsDecoder(int width, int height);
    ~SmushDeltaGlyphsDecoder();
    bool decode(byte *dst, const byte *src);
};

} // End of namespace Scumm

#endif