Encoder.h

#pragma once

class Encoder 
{
public:
        typedef enum {
                CCW = -1, 
                NONE = 0, 
                CW = 1, 
        } Rotation;

        typedef enum {
                ANY, 
                ACTIVE_LOW, 
                ACTIVE_HIGH, 
        } Polarity;

        Encoder() { setup(0, ANY); };

        Encoder(unsigned int debounce, Polarity polarity = ANY) { setup(debounce, polarity); };

        void setup(unsigned int debounce, Polarity polarity = ANY);

        void reset(int position = 0);

        Rotation process(bool a, bool b);

        int get();
private:
        bool validEdge(bool a);
        unsigned int debouncing_;
        unsigned int debounce_;
        int position_;
        Polarity polarity_;
        bool a_;
        bool lastA_;
        bool primed_;
};