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/* -*- c++ -*- */
/*
* Copyright 2002,2004,2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_GR_FXPT_NCO_H
#define INCLUDED_GR_FXPT_NCO_H
#include <gnuradio/api.h>
#include <gnuradio/fxpt.h>
#include <gnuradio/gr_complex.h>
#include <cstdint>
namespace gr {
/*!
* \brief Numerically Controlled Oscillator (NCO)
* \ingroup misc
*/
class /*GR_RUNTIME_API*/ fxpt_nco
{
uint32_t d_phase;
int32_t d_phase_inc;
public:
fxpt_nco() : d_phase(0), d_phase_inc(0) {}
~fxpt_nco() {}
// radians
void set_phase(float angle) { d_phase = gr::fxpt::float_to_fixed(angle); }
void adjust_phase(float delta_phase)
{
d_phase += gr::fxpt::float_to_fixed(delta_phase);
}
// angle_rate is in radians / step
void set_freq(float angle_rate)
{
d_phase_inc = gr::fxpt::float_to_fixed(angle_rate);
}
// angle_rate is a delta in radians / step
void adjust_freq(float delta_angle_rate)
{
d_phase_inc += gr::fxpt::float_to_fixed(delta_angle_rate);
}
// increment current phase angle
void step() { d_phase += d_phase_inc; }
void step(int n) { d_phase += d_phase_inc * n; }
// units are radians / step
float get_phase() const { return gr::fxpt::fixed_to_float(d_phase); }
float get_freq() const { return gr::fxpt::fixed_to_float(d_phase_inc); }
// compute sin and cos for current phase angle
void sincos(float* sinx, float* cosx) const
{
*sinx = gr::fxpt::sin(d_phase);
*cosx = gr::fxpt::cos(d_phase);
}
// compute cos and sin for a block of phase angles
void sincos(gr_complex* output, int noutput_items, double ampl = 1.0)
{
for (int i = 0; i < noutput_items; i++) {
output[i] =
gr_complex(gr::fxpt::cos(d_phase) * ampl, gr::fxpt::sin(d_phase) * ampl);
step();
}
}
// compute sin for a block of phase angles
void sin(float* output, int noutput_items, double ampl = 1.0)
{
for (int i = 0; i < noutput_items; i++) {
output[i] = (float)(gr::fxpt::sin(d_phase) * ampl);
step();
}
}
// compute cos for a block of phase angles
void cos(float* output, int noutput_items, double ampl = 1.0)
{
for (int i = 0; i < noutput_items; i++) {
output[i] = (float)(gr::fxpt::cos(d_phase) * ampl);
step();
}
}
// compute sin for a block of phase angles
void sin(std::int8_t* output, int noutput_items, double ampl = 1.0)
{
for (int i = 0; i < noutput_items; i++) {
output[i] = (std::int8_t)(gr::fxpt::sin(d_phase) * ampl);
step();
}
}
// compute cos for a block of phase angles
void cos(std::int8_t* output, int noutput_items, double ampl = 1.0)
{
for (int i = 0; i < noutput_items; i++) {
output[i] = (std::int8_t)(gr::fxpt::cos(d_phase) * ampl);
step();
}
}
// compute sin for a block of phase angles
void sin(short* output, int noutput_items, double ampl = 1.0)
{
for (int i = 0; i < noutput_items; i++) {
output[i] = (short)(gr::fxpt::sin(d_phase) * ampl);
step();
}
}
// compute cos for a block of phase angles
void cos(short* output, int noutput_items, double ampl = 1.0)
{
for (int i = 0; i < noutput_items; i++) {
output[i] = (short)(gr::fxpt::cos(d_phase) * ampl);
step();
}
}
// compute sin for a block of phase angles
void sin(int* output, int noutput_items, double ampl = 1.0)
{
for (int i = 0; i < noutput_items; i++) {
output[i] = (int)(gr::fxpt::sin(d_phase) * ampl);
step();
}
}
// compute cos for a block of phase angles
void cos(int* output, int noutput_items, double ampl = 1.0)
{
for (int i = 0; i < noutput_items; i++) {
output[i] = (int)(gr::fxpt::cos(d_phase) * ampl);
step();
}
}
// compute cos or sin for current phase angle
float cos() const { return gr::fxpt::cos(d_phase); }
float sin() const { return gr::fxpt::sin(d_phase); }
};
} /* namespace gr */
#endif /* INCLUDED_GR_FXPT_NCO_H */
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