sonarc_audio_sample.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 ULTIMA8_AUDIO_SONARCAUDIOSAMPLE_H
#define ULTIMA8_AUDIO_SONARCAUDIOSAMPLE_H

#include "ultima/ultima8/audio/audio_sample.h"

namespace Ultima {
namespace Ultima8 {

class SonarcAudioSample : public AudioSample {
    struct SonarcDecompData {
        uint32      _pos;
        uint32      _samplePos;
    };

    static bool _generatedOneTable;
    static int  _oneTable[256];

    static void GenerateOneTable();

    static void decode_EC(int mode, int samplecount,
                          const uint8 *source, int sourcesize,
                          uint8 *dest);
    static void decode_LPC(int order, int nsamples,
                           uint8 *dest, const uint8 *factors);
    static int audio_decode(const uint8 *source, uint8 *dest);

    int _frameSize;
    uint32 _srcOffset;

public:
    SonarcAudioSample(const uint8 *buffer, uint32 size);
    ~SonarcAudioSample(void) override;

    Audio::SeekableAudioStream *makeStream() const override;

private:
    uint32 decompressFrame(SonarcDecompData *decompData, uint8 *samples) const;
};

} // End of namespace Ultima8
} // End of namespace Ultima

#endif