/*
 * Filename:    envelope.h
 *
 * Description:
 *
 *
 * Version:     
 * Created:     Wed Oct 30 17:15:02 2019
 * Revision:    None
 * Author:      Rachel Fae Fox (foxiepaws),fox@foxiepa.ws
 *
 */

#ifndef _H_ENVELOPE
#define _H_ENVELOPE
#include <stdbool.h>
#include "../common.h"

typedef enum EnvState {_e_off,_e_attack, _e_attackrelease, _e_decay, _e_sustain,_e_release, _e_finished} EnvState;
typedef struct Envelope {
    // these values are in samples.
    unsigned int attack;
    unsigned int decay;
    unsigned int release;
    float sustain_level;
    float max_level;
    float min_level;
    float level;
    bool gate;
    unsigned long t;
    EnvState envstate;
    bool ar;
    bool sustain;
    float(*process)(struct Envelope *,EngineState *);
    
} Envelope;

float envelope_process(Envelope *self, EngineState *t);
Envelope* envelope_new();

#endif