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 ADL_SOUND_H
#define ADL_SOUND_H
 
#include "audio/audiostream.h"
 
#include "common/array.h"
#include "common/frac.h"
 
namespace Adl {
 
class Speaker;
 
struct Tone {
    double freq; // Hz
    double len; // ms
 
    Tone(double frequency, double length) : freq(frequency), len(length) { }
};
 
typedef Common::Array<Tone> Tones;
 
class Sound : public Audio::AudioStream {
public:
    Sound(const Tones &tones);
    ~Sound() override;
 
    // AudioStream
    int readBuffer(int16 *buffer, const int numSamples) override;
    bool isStereo() const override { return false; }
    bool endOfData() const override;
    int getRate() const override    { return _rate; }
 
private:
    const Tones &_tones;
 
    Speaker *_speaker;
    int _rate;
    uint _toneIndex;
    int _samplesRem;
};
 
} // End of namespace Adl
 
#endif