Metronome.h

/*
 * Metronome.h
 *
 * This file is part of Mozzi.
 *
 * Copyright 2012-2024 Tim Barrass and the Mozzi Team
 *
 * Mozzi is licensed under the GNU Lesser General Public Licence (LGPL) Version 2.1 or later.
 *
 */
 
 
#ifndef METRO_H_
#define METRO_H_
 
#include "EventDelay.h"
 
class Metronome: public EventDelay
{
 
public:
 
    Metronome(unsigned int delay_milliseconds = 0): EventDelay(delay_milliseconds), stopped(false) {
    }
 
    
    inline
    void start()
    {
        deadline=audioTicks()+ticks;
        stopped = false;
    }
    
    
    inline
    void start(unsigned int delay_milliseconds)
    {
        set(delay_milliseconds);
        start();
    }
    
    
    
    inline
    void setBPM(float bpm)
    {
        set((unsigned int) (60000.f/bpm));
    }
    
    
 
    
    inline
    bool ready()
    {
        unsigned long now = audioTicks();
        if ((now<deadline) || stopped) return false;
 
        deadline=now-(now-deadline)+ticks; // subtract overrun so the timing doesn't slip
        return true;
    }
    
    
    inline
    void stop(){
        stopped = true;
    }
 
private:
    bool stopped;
};
 
 
 
 
#endif /* METRO_H_ */