sdrangel/wdsp/varsamp.hpp

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2024-06-16 09:31:13 +00:00
/* 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 "export.h"
namespace WDSP {
class WDSP_API VARSAMP
{
public:
int run;
int size;
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float* in;
float* out;
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int in_rate;
int out_rate;
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float fcin;
float fc;
float fc_low;
float gain;
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int idx_in;
int ncoef;
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float* h;
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int rsize;
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float* ring;
float var;
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int varmode;
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float cvar;
float inv_cvar;
float old_inv_cvar;
float dicvar;
float delta;
float* hs;
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int R;
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float h_offset;
float isamps;
float nom_ratio;
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static VARSAMP* create_varsamp (
int run,
int size,
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float* in,
float* out,
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int in_rate,
int out_rate,
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float fc,
float fc_low,
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int R,
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float gain,
float var,
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int varmode
);
static void destroy_varsamp (VARSAMP *a);
static void flush_varsamp (VARSAMP *a);
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static int xvarsamp (VARSAMP *a, float var);
static void setBuffers_varsamp (VARSAMP *a, float* in, float* out);
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static void setSize_varsamp (VARSAMP *a, int size);
static void setInRate_varsamp (VARSAMP *a, int rate);
static void setOutRate_varsamp (VARSAMP *a, int rate);
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static void setFCLow_varsamp (VARSAMP *a, float fc_low);
static void setBandwidth_varsamp (VARSAMP *a, float fc_low, float fc_high);
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// Exported calls
static void* create_varsampV (int in_rate, int out_rate, int R);
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static void xvarsampV (float* input, float* output, int numsamps, float var, int* outsamps, void* ptr);
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static void destroy_varsampV (void* ptr);
private:
static void calc_varsamp (VARSAMP *a);
static void decalc_varsamp (VARSAMP *a);
static void hshift (VARSAMP *a);
};
} // namespace WDSP
#endif