circular.hpp

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#ifndef OPENEV_CONTAINERS_CIRCULAR_HPP
#define OPENEV_CONTAINERS_CIRCULAR_HPP
 
#include "openev/core/types.hpp"
#include <boost/circular_buffer.hpp>
#include <numeric>
 
namespace ev {
template <typename T>
class CircularBuffer_ : public boost::circular_buffer<Event_<T>> {
  using boost::circular_buffer<Event_<T>>::circular_buffer;
 
public:
  template <typename... Args>
  inline void emplace_back(Args &&...args) {
    boost::circular_buffer<Event_<T>>::push_back(Event_<T>(std::forward<Args>(args)...));
  }
 
  template <typename... Args>
  inline void emplace_front(Args &&...args) {
    boost::circular_buffer<Event_<T>>::push_front(Event_<T>(std::forward<Args>(args)...));
  }
  [[nodiscard]] inline double duration() const {
    return boost::circular_buffer<Event_<T>>::back().t - boost::circular_buffer<Event_<T>>::front().t;
  }
 
  [[nodiscard]] inline double rate() const {
    return boost::circular_buffer<Event_<T>>::size() / duration();
  }
 
  [[nodiscard]] Eventd mean() const {
    const double x = std::accumulate(boost::circular_buffer<Event_<T>>::begin(), boost::circular_buffer<Event_<T>>::end(), 0.0, [](double sum, const Event_<T> &e) { return sum + e.x; }) / boost::circular_buffer<Event_<T>>::size();
    const double y = std::accumulate(boost::circular_buffer<Event_<T>>::begin(), boost::circular_buffer<Event_<T>>::end(), 0.0, [](double sum, const Event_<T> &e) { return sum + e.y; }) / boost::circular_buffer<Event_<T>>::size();
    const double t = std::accumulate(boost::circular_buffer<Event_<T>>::begin(), boost::circular_buffer<Event_<T>>::end(), 0.0, [](double sum, const Event_<T> &e) { return sum + e.t; }) / boost::circular_buffer<Event_<T>>::size();
    const double p = std::accumulate(boost::circular_buffer<Event_<T>>::begin(), boost::circular_buffer<Event_<T>>::end(), 0.0, [](double sum, const Event_<T> &e) { return sum + e.p; }) / boost::circular_buffer<Event_<T>>::size();
    return {x, y, t, p > 0.5};
  }
 
  [[nodiscard]] inline cv::Point2d meanPoint() const {
    const double x = std::accumulate(boost::circular_buffer<Event_<T>>::begin(), boost::circular_buffer<Event_<T>>::end(), 0.0, [](double sum, const Event_<T> &e) { return sum + e.x; }) / boost::circular_buffer<Event_<T>>::size();
    const double y = std::accumulate(boost::circular_buffer<Event_<T>>::begin(), boost::circular_buffer<Event_<T>>::end(), 0.0, [](double sum, const Event_<T> &e) { return sum + e.y; }) / boost::circular_buffer<Event_<T>>::size();
    return {x, y};
  }
 
  [[nodiscard]] inline double meanTime() const {
    return std::accumulate(boost::circular_buffer<Event_<T>>::begin(), boost::circular_buffer<Event_<T>>::end(), 0.0, [](double sum, const Event_<T> &e) { return sum + e.t; }) / boost::circular_buffer<Event_<T>>::size();
  }
 
  [[nodiscard]] inline double midTime() const {
    return 0.5 * (boost::circular_buffer<Event_<T>>::front().t + boost::circular_buffer<Event_<T>>::back().t);
  }
};
using CircularBufferi = CircularBuffer_<int>;    
using CircularBufferl = CircularBuffer_<long>;   
using CircularBufferf = CircularBuffer_<float>;  
using CircularBufferd = CircularBuffer_<double>; 
using CircularBuffer = CircularBufferi;          
} // namespace ev
 
#endif // OPENEV_CONTAINERS_CIRCULAR_HPP