wrEvent.h

#pragma once

#include <stdint.h>
#include <stdlib.h>

#define EXTRACT_HIST_LENGTH 2 // >= 1 (no delay)

typedef enum etrig
    { tr_none       = 0
    , tr_p_negative = 1
    , tr_p_same     = 2
    , tr_p_positive = 3
    , tr_hold       = 4
    , tr_n_negative = 5 // as for 1-3 w/ b3 masked negative
    , tr_n_same     = 6
    , tr_n_positive = 7
    } etrig_t;

typedef struct event_extract {
   // parameters
   int8_t  hyst_time;
   float   tr_abs_level;
   float   tr_rel_level;
   float   cv_thresh_same;
   float   cv_thresh_opp;

   // state
   int8_t  hyst;          // hysteresis
   float   in_history[EXTRACT_HIST_LENGTH]; // input history
   int8_t  gate_state;    // +/-1 if gate is high/low, else 0
} event_extract_t;

// variable speed
event_extract_t* Extract_init( void );
void Extract_deinit( event_extract_t* e );
etrig_t Extract_cv_trigger( event_extract_t* e, float in );

typedef struct debounce{
    uint8_t state;
    uint16_t count;
    uint16_t count_to;
} Debounce_t;

Debounce_t* Debounce_init( uint16_t debounce_count );
void Debounce_deinit( Debounce_t* db );
uint8_t Debounce_step( Debounce_t* db, uint8_t in );

typedef struct debounce_a{
    uint8_t state;
    uint16_t count;
    uint16_t count_to_up;
    uint16_t count_to_down;
} Debounce_a_t;

Debounce_a_t* Debounce_a_init( uint16_t debounce_count_up
                             , uint16_t debounce_count_down
                             );
void Debounce_a_deinit( Debounce_a_t* db );
uint8_t Debounce_a_step( Debounce_a_t* db, uint8_t in );