sphericalheadmic.h

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/*
 directivityhrtf.h
 Spatial Audio Library (SAL)
 Copyright (c) 2011, Enzo De Sena
 All rights reserved.
 
 Authors: Enzo De Sena, enzodesena@gmail.com
 
 */

#ifndef SAL_DIRECTIVITYSPHERICAL_H
#define SAL_DIRECTIVITYSPHERICAL_H

#include "microphone.h"
#include "saltypes.h"
#include "kemarmic.h"
#include <map>
#include "salconstants.h"

namespace sal {

class SphericalHeadMic : public BinauralMic {
public:
  SphericalHeadMic(const mcl::Point position, const mcl::Quaternion orientation, 
                   const Angle ears_angle,
                   const Length sphere_radius,
                   const Int ir_length,
                   const Time sampling_frequency,
                   const Int update_length = 0);
  
  static bool Test();
  
  virtual ~SphericalHeadMic() {}
private:
  
  virtual Signal GetBrir(const Ear ear, const mcl::Point& point) noexcept;
  
  static mcl::Complex Sphere(Length a, Length r, Angle theta,
                             Time f, Time c, mcl::Real threshold);
  
  static Signal GenerateImpulseResponse(Length sphere_radius,
                                        Length source_distance,
                                        Angle theta,
                                        Time sound_speed,
                                        mcl::Real threshold,
                                        Int num_samples,
                                        Time sampling_frequency,
                                        bool minimum_phase = false);
  
  static Angle GetTheta(const mcl::Point& point,
                            const Angle& ears_angle,
                            const Ear& ear);

  
  Angle ears_angle_;
  
  Length sphere_radius_;
  
  Time sampling_frequency_;
  
  Int impulse_response_length_;
  
  Time sound_speed_;
  
  mcl::Real alg_threshold_;
  
};
  
} // namespace sal

#endif