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sdrangel/wdsp/varsamp.hpp
2024-08-10 06:40:35 +02:00

107 lines
2.5 KiB
C++

/* varsamp.h
This file is part of a program that implements a Software-Defined Radio.
Copyright (C) 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
*/
#ifndef wdsp_varsamp_h
#define wdsp_varsamp_h
#include <vector>
#include "export.h"
namespace WDSP {
class WDSP_API VARSAMP
{
public:
int run;
int size;
float* in;
float* out;
int in_rate;
int out_rate;
float fcin;
float fc;
float fc_low;
float gain;
int idx_in;
int ncoef;
std::vector<float> h;
int rsize;
std::vector<float> ring;
float var;
int varmode;
float cvar;
float inv_cvar;
float old_inv_cvar;
float dicvar;
float delta;
std::vector<float> hs;
int R;
float h_offset;
float isamps;
float nom_ratio;
VARSAMP(
int run,
int size,
float* in,
float* out,
int in_rate,
int out_rate,
float fc,
float fc_low,
int R,
float gain,
float var,
int varmode
);
VARSAMP(const VARSAMP&) = delete;
VARSAMP& operator=(VARSAMP& other) = delete;
~VARSAMP() = default;
void flush();
int execute(float var);
void setBuffers(float* in, float* out);
void setSize(int size);
void setInRate(int rate);
void setOutRate(int rate);
void setFCLow(float fc_low);
void setBandwidth(float fc_low, float fc_high);
// Exported calls
static void* create_varsampV (int in_rate, int out_rate, int R);
static void xvarsampV (float* input, float* output, int numsamps, float var, int* outsamps, void* ptr);
static void destroy_varsampV (void* ptr);
private:
void calc();
void hshift();
};
} // namespace WDSP
#endif