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fxpt_nco.h
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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 */
gr::fxpt_nco
Numerically Controlled Oscillator (NCO)
Definition fxpt_nco.h:26
gr::fxpt_nco::sin
void sin(int *output, int noutput_items, double ampl=1.0)
Definition fxpt_nco.h:137
gr::fxpt_nco::get_phase
float get_phase() const
Definition fxpt_nco.h:62
gr::fxpt_nco::adjust_freq
void adjust_freq(float delta_angle_rate)
Definition fxpt_nco.h:50
gr::fxpt_nco::adjust_phase
void adjust_phase(float delta_phase)
Definition fxpt_nco.h:38
gr::fxpt_nco::cos
void cos(short *output, int noutput_items, double ampl=1.0)
Definition fxpt_nco.h:128
gr::fxpt_nco::fxpt_nco
fxpt_nco()
Definition fxpt_nco.h:31
gr::fxpt_nco::sincos
void sincos(gr_complex *output, int noutput_items, double ampl=1.0)
Definition fxpt_nco.h:73
gr::fxpt_nco::get_freq
float get_freq() const
Definition fxpt_nco.h:63
gr::fxpt_nco::set_freq
void set_freq(float angle_rate)
Definition fxpt_nco.h:44
gr::fxpt_nco::cos
void cos(int *output, int noutput_items, double ampl=1.0)
Definition fxpt_nco.h:146
gr::fxpt_nco::cos
void cos(std::int8_t *output, int noutput_items, double ampl=1.0)
Definition fxpt_nco.h:110
gr::fxpt_nco::~fxpt_nco
~fxpt_nco()
Definition fxpt_nco.h:33
gr::fxpt_nco::cos
void cos(float *output, int noutput_items, double ampl=1.0)
Definition fxpt_nco.h:92
gr::fxpt_nco::cos
float cos() const
Definition fxpt_nco.h:155
gr::fxpt_nco::sin
void sin(short *output, int noutput_items, double ampl=1.0)
Definition fxpt_nco.h:119
gr::fxpt_nco::sincos
void sincos(float *sinx, float *cosx) const
Definition fxpt_nco.h:66
gr::fxpt_nco::set_phase
void set_phase(float angle)
Definition fxpt_nco.h:36
gr::fxpt_nco::step
void step()
Definition fxpt_nco.h:57
gr::fxpt_nco::sin
float sin() const
Definition fxpt_nco.h:156
gr::fxpt_nco::sin
void sin(std::int8_t *output, int noutput_items, double ampl=1.0)
Definition fxpt_nco.h:101
gr::fxpt_nco::step
void step(int n)
Definition fxpt_nco.h:59
gr::fxpt_nco::sin
void sin(float *output, int noutput_items, double ampl=1.0)
Definition fxpt_nco.h:83
gr::fxpt::cos
static float cos(int32_t x)
Definition fxpt.h:65
gr::fxpt::float_to_fixed
static int32_t float_to_fixed(float x)
Definition fxpt.h:41
gr::fxpt::sin
static float sin(int32_t x)
Given a fixed point angle x, return float sine (x)
Definition fxpt.h:55
gr::fxpt::fixed_to_float
static float fixed_to_float(int32_t x)
Definition fxpt.h:50
fxpt.h
api.h
gr_complex.h
gr_complex
std::complex< float > gr_complex
Definition gr_complex.h:15
gr
GNU Radio logging wrapper.
Definition basic_block.h:29