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goertzel.h
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/* -*- c++ -*- */
/*
* Copyright 2006,2011,2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_FFT_IMPL_GOERTZEL_H
#define INCLUDED_FFT_IMPL_GOERTZEL_H
#include <gnuradio/fft/api.h>
#include <gnuradio/types.h>
namespace gr {
namespace fft {
/*!
* \brief Implements Goertzel single-bin DFT calculation
* \ingroup misc
*/
class FFT_API goertzel
{
public:
goertzel(int rate, int len, float freq);
void set_params(int rate, int len, float freq);
// Process a input array
gr_complex batch(const float* in);
// Process sample by sample
void input(const float& in);
gr_complex output();
bool ready() const { return d_processed == d_len; }
private:
float d_d1;
float d_d2;
float d_wr;
float d_wi;
int d_len;
int d_processed;
};
} /* namespace fft */
} /* namespace gr */
#endif /* INCLUDED_FFT_IMPL_GOERTZEL_H */
gr::fft::goertzel
Implements Goertzel single-bin DFT calculation.
Definition goertzel.h:25
gr::fft::goertzel::goertzel
goertzel(int rate, int len, float freq)
gr::fft::goertzel::batch
gr_complex batch(const float *in)
gr::fft::goertzel::ready
bool ready() const
Definition goertzel.h:37
gr::fft::goertzel::input
void input(const float &in)
gr::fft::goertzel::output
gr_complex output()
gr::fft::goertzel::set_params
void set_params(int rate, int len, float freq)
api.h
FFT_API
#define FFT_API
Definition gr-fft/include/gnuradio/fft/api.h:18
gr_complex
std::complex< float > gr_complex
Definition gr_complex.h:15
gr
GNU Radio logging wrapper.
Definition basic_block.h:29
types.h