sim_src.hpp

/*xxx
* \brief - SIM::src  - sample rate converter with sinc fir reconstruction filter
* \author maki
*/


#ifndef SIM_SRC_HPP
#define SIM_SRC_HPP

#include <itpp/itbase.h>
#include "sim\_sim_enum_def.h"

using namespace itpp;
using namespace std;

namespace SIM
{
class src
{
private:
  int  NTaps;               
  win_type WIN;             

  double *p_x_cb;           
  int x_cb_i;               

  double sinc(double x);    

  double h(double nt);    

public:

  double y0;                  

  double re_samp(double tau);
  
  void xcb(double x_new);
  
  src()
  {
    y0 = 0.0;
    NTaps = 15;                                       // default kernel size
    p_x_cb = new double[NTaps];             // circular buffer initialization
    for(int i = 0; i < NTaps; i++) p_x_cb[i] = 0.0;
    x_cb_i = 0;
    WIN = WIN_HANNING;                  // default sinc windowing
  };

  ~src()
  {
    delete [] p_x_cb;
  };

  void set_size(int n);

  void set_win_type(int w);
  
  void set_output(double yout);

  int get_size(void);

  int get_win_type(void);

  double get_output(void);

  vec process(const bmat &ceio, const mat &xt);
};

}      // namespace SIM
#endif //SIM_SRC_HPP