sound.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 MADE_SOUND_H
#define MADE_SOUND_H

#include "common/array.h"

namespace Made {

class ManholeEgaSoundDecompressor {
public:
    void decompress(byte *source, byte *dest, uint32 size);
protected:
    byte *_source, *_dest;
    uint32 _size;
    uint16 _bitBuffer;
    int _bitsLeft;
    int32 _sample1, _sample2, _sample3, _sample4;
    bool _writeFlag;
    bool _eof;
    int _mode;
    int getBit();
    void update0();
    void update1();
    void update2();
    void update3();
};

struct SoundEnergyItem {
    uint32 position;
    byte energy;
};

typedef Common::Array<SoundEnergyItem> SoundEnergyArray;


// Persistent data for decompressSound(). When calling decompressSound()
// repeatedly (for the same stream), pass the same SoundDecoderData object to
// ensure decoding properly resumes.
class SoundDecoderData {
public:
    SoundDecoderData() {
        memset(_soundBuffer, 0x80, sizeof(_soundBuffer));
        _prevSample = 0;
    }

    byte _soundBuffer[1025];
    int16 _prevSample;
};

void decompressSound(byte *source, byte *dest, uint16 chunkSize, uint16 chunkCount, SoundEnergyArray *soundEnergyArray = NULL, SoundDecoderData *decoderData = NULL);

} // End of namespace Made

#endif /* MADE_H */