kopia lustrzana https://github.com/f4exb/sdrangel
98 wiersze
3.3 KiB
C++
98 wiersze
3.3 KiB
C++
/* resample.h
|
|
|
|
This file is part of a program that implements a Software-Defined Radio.
|
|
|
|
Copyright (C) 2013 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
|
|
|
|
*/
|
|
|
|
/************************************************************************************************
|
|
* *
|
|
* VERSION FOR COMPLEX DOUBLE-PRECISION *
|
|
* *
|
|
************************************************************************************************/
|
|
|
|
#ifndef wdsp_resample_h
|
|
#define wdsp_resample_h
|
|
|
|
#include "export.h"
|
|
|
|
namespace WDSP {
|
|
|
|
class WDSP_API RESAMPLE
|
|
{
|
|
public:
|
|
int run; // run
|
|
int size; // number of input samples per buffer
|
|
float* in; // input buffer for resampler
|
|
float* out; // output buffer for resampler
|
|
int in_rate;
|
|
int out_rate;
|
|
double fcin;
|
|
double fc;
|
|
double fc_low;
|
|
double gain;
|
|
int idx_in; // index for input into ring
|
|
int ncoefin;
|
|
int ncoef; // number of coefficients
|
|
int L; // interpolation factor
|
|
int M; // decimation factor
|
|
double* h; // coefficients
|
|
int ringsize; // number of complex pairs the ring buffer holds
|
|
double* ring; // ring buffer
|
|
int cpp; // coefficients of the phase
|
|
int phnum; // phase number
|
|
|
|
static RESAMPLE* create_resample (
|
|
int run,
|
|
int size,
|
|
float* in,
|
|
float* out,
|
|
int in_rate,
|
|
int out_rate,
|
|
double fc,
|
|
int ncoef,
|
|
double gain
|
|
);
|
|
static void destroy_resample (RESAMPLE *a);
|
|
static void flush_resample (RESAMPLE *a);
|
|
static int xresample (RESAMPLE *a);
|
|
static void setBuffers_resample (RESAMPLE *a, float* in, float* out);
|
|
static void setSize_resample(RESAMPLE *a, int size);
|
|
static void setInRate_resample(RESAMPLE *a, int rate);
|
|
static void setOutRate_resample(RESAMPLE *a, int rate);
|
|
static void setFCLow_resample (RESAMPLE *a, double fc_low);
|
|
static void setBandwidth_resample (RESAMPLE *a, double fc_low, double fc_high);
|
|
// Exported calls
|
|
static void* create_resampleV (int in_rate, int out_rate);
|
|
static void xresampleV (float* input, float* output, int numsamps, int* outsamps, void* ptr);
|
|
static void destroy_resampleV (void* ptr);
|
|
|
|
private:
|
|
static void calc_resample (RESAMPLE *a);
|
|
static void decalc_resample (RESAMPLE *a);
|
|
};
|
|
|
|
} // namespace WDSP
|
|
|
|
#endif
|