N900/Lens.h

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#ifndef FCAM_N900_LENS_H
#define FCAM_N900_LENS_H

#include "../Lens.h"
#include "../CircularBuffer.h"
#include "../Time.h"
#include <vector>

namespace FCam { namespace N900 {
    
    class Lens : public FCam::Lens {
             
      public:
    Lens();
    ~Lens();
    
    void setFocus(float, float speed);
    float getFocus();

    float farFocus() {return 0.0f;}

    float nearFocus() {return 20.0f;}
    bool focusChanging();   
    float minFocusSpeed();
    float maxFocusSpeed();

    // setFocus takes about 350us, so I'll guess the lens starts moving halfway through
    int focusLatency() {return 175;} 

    void setZoom(float, float) {}
    float getZoom() {return 5.2f;}
    float minZoom() {return 5.2f;}
    float maxZoom() {return 5.2f;}
    bool zoomChanging() {return false;}
    float minZoomSpeed() {return 0;}
    float maxZoomSpeed() {return 0;}
    int zoomLatency() {return 0;}
    
    void setAperture(float, float) {}
    float getAperture() {return 2.8f;}
    float wideAperture(float) {return 2.8f;}
    float narrowAperture(float) {return 2.8f;}
    bool apertureChanging() {return false;}
    int apertureLatency() {return 0;}
    float minApertureSpeed() {return 0.0f;}
    float maxApertureSpeed() {return 0.0f;}

    void tagFrame(FCam::Frame *f);

    float getFocus(Time t);

      private:

    int ioctlSet(unsigned key, int val);
    int ioctlGet(unsigned key);
        
    float ticksToDiopters(int);
    int dioptersToTicks(float);
    float tickRateToDiopterRate(int);
    int diopterRateToTickRate(float);
        
    struct LensState {
        Time time;
        float position;
    };
    CircularBuffer<LensState> lensHistory;          
    };

}}

#endif

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