sdrangel/wdsp/bandpass.hpp

/*  bandpass.h

This file is part of a program that implements a Software-Defined Radio.

Copyright (C) 2013, 2016, 2017 Warren Pratt, NR0V
Copyright (C) 2024 Edouard Griffiths, F4EXB Adapted to SDRangel

This program 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.

This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

The author can be reached by email at

warren@wpratt.com

*/

/********************************************************************************************************
*                                                                                                       *
*                                       Overlap-Save Bandpass                                           *
*                                                                                                       *
********************************************************************************************************/

#ifndef wdsp_bandpass_h
#define wdsp_bandpass_h

#include "fftw3.h"
#include "export.h"

/********************************************************************************************************
*                                                                                                       *
*                                   Partitioned Overlap-Save Bandpass                                   *
*                                                                                                       *
********************************************************************************************************/

namespace WDSP {

class FIRCORE;
class RXA;
class TXA;

class WDSP_API BANDPASS
{
public:
    int run;
    int position;
    int size;
    int nc;
    int mp;
    float* in;
    float* out;
    float f_low;
    float f_high;
    float samplerate;
    int wintype;
    float gain;
    FIRCORE *p;

    static BANDPASS *create_bandpass (int run, int position, int size, int nc, int mp, float* in, float* out,
        float f_low, float f_high, int samplerate, int wintype, float gain);
    static void destroy_bandpass (BANDPASS *a);
    static void flush_bandpass (BANDPASS *a);
    static void xbandpass (BANDPASS *a, int pos);
    static void setBuffers_bandpass (BANDPASS *a, float* in, float* out);
    static void setSamplerate_bandpass (BANDPASS *a, int rate);
    static void setSize_bandpass (BANDPASS *a, int size);
    static void setGain_bandpass (BANDPASS *a, float gain, int update);
    static void CalcBandpassFilter (BANDPASS *a, float f_low, float f_high, float gain);
    // RXA Prototypes
    static void SetBandpassFreqs (RXA& rxa, float f_low, float f_high);
    static void SetBandpassNC (RXA& rxa, int nc);
    static void SetBandpassMP (RXA& rxa, int mp);
    // TXA Prototypes
    static void SetBandpassNC (TXA& txa, int nc);
    static void SetBandpassMP (TXA& txa, int mp);
};

} // namespace WDSP

#endif