Flatten.hpp

#ifndef FLATTEN_HPP__
#define FLATTEN_HPP__

#include <memory>

// Functor by which to flatten (or not, by default) a spectrum; not
// reentrant, but serially reusable.

class Flatten
{
public:

  // Constructor
  explicit Flatten(bool = false);

  // Destructor
  ~Flatten();

  // Turn flattening on or off
  void operator()(bool value);

  // Process (or not) the supplied spectrum data
  void operator()(float     * data,
                  std::size_t size);

  // Return active / inactive flattening status
  explicit operator bool() const noexcept { return !!m_impl; }
  bool              live() const noexcept { return !!m_impl; }

private:

  class           Impl;
  std::unique_ptr<Impl> m_impl;
};

#endif