root/SigProc/trunk/SigProc/SigProc.h @ 2306

/****************************************************************************

Copyright 2005,2006 Virginia Polytechnic Institute and State University

This file is part of the OSSIE Decimator.

OSSIE Decimator is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

OSSIE Decimator is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with OSSIE Decimator; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


****************************************************************************/

#ifndef SIG_PROC_H
#define SIG_PROC_H

#include <iostream>
#include <fstream>
#include <string>

#ifdef FPM
#include "fixed.h"
#endif

namespace SigProc {

class phase_detect {

 public:
    phase_detect(float scale_factor);
 
    void do_work(short I_in, short Q_in, short I_nco, short Q_nco, short &out);

 private:
    phase_detect(const phase_detect &);

    float scale_factor;
};


class nco {
  public:
    nco();
    nco(unsigned int max_out);

    void do_work(short control_voltage, short &sine, short &cosine);

  private:
    nco(const nco &);

    int freq_index;
    int max_out;
};

class gain {
  public:
    gain();

    void do_work(float gain, short data_in, short &out);

  private:
    gain(const gain &);

};

class iir_filter {
  public:
    iir_filter(float a[], unsigned int len_a, float b[], unsigned int len_b);

    void do_work(short x, short &y);

  private:
    iir_filter(const iir_filter &);

    float *A;
    float *B;
    unsigned int len_A, len_B;

    float *v;
    unsigned int len_v;
    unsigned int next_v;
};

class fir_filter {
  public:
    fir_filter(float a[], unsigned int len_a);

    void do_work(bool run_filter, short in_sample, short &out_sample);

  private:
    fir_filter(const fir_filter &);

#ifdef FPM
    mad_fixed_t *A;
    mad_fixed_t *v;
#else
    float *A;
    short *v;
#endif
    unsigned int len_A;

    unsigned int len_v;
    unsigned int next_v;
};

class dump_data {
 public:
  dump_data(const char *filename, long start_sample, long number_of_samples);
  ~dump_data();

  void write_data(float data, const char *msg = "");
  void write_data(float a, float b, const char *msg = "");

 private:
  dump_data();
  dump_data(const dump_data &);

  std::ofstream *out_file;

  long start_sample, stop_sample;
  long current_sample;

};

class dc_block {
  public:
    dc_block(const float forget_factor);
    ~dc_block();

    void do_work(short in, short &out);

  private:
    dc_block();
    dc_block(const dc_block &);

    float forget_factor;
    int prev_input, prev_output;

};
}

#endif