Envelope.hpp

#ifndef __AMUSE_ENVELOPE_HPP__
#define __AMUSE_ENVELOPE_HPP__

#include "AudioGroupPool.hpp"

namespace amuse
{

class Envelope
{
public:
    enum class State
    {
        Attack,
        Decay,
        Sustain,
        Release,
        Complete
    };
private:
    State m_phase = State::Attack; 
    double m_attackTime = 0.0; 
    double m_decayTime = 0.0; 
    double m_sustainFactor = 1.0; 
    double m_releaseTime = 0.0; 
    double m_releaseStartFactor; 
    double m_curTime; 
public:
    void reset(const ADSR* adsr);
    void reset(const ADSRDLS* adsr, int8_t note, int8_t vel);
    void keyOff();
    float nextSample(double sampleRate);
    bool isComplete() const {return m_phase == State::Complete;}
};

}

#endif // __AMUSE_ENVELOPE_HPP__