GNU Radio 3.7.2.2 C++ API
goertzel.h
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/* -*- c++ -*- */
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/*
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* Copyright 2006,2011,2012 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef INCLUDED_FFT_IMPL_GOERTZEL_H
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#define INCLUDED_FFT_IMPL_GOERTZEL_H
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#include <
gnuradio/fft/api.h
>
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#include <
gnuradio/types.h
>
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namespace
gr {
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namespace
fft {
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/*!
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* \brief Implements Goertzel single-bin DFT calculation
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* \ingroup misc
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*/
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class
FFT_API
goertzel
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{
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public
:
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goertzel
(
int
rate,
int
len,
float
freq);
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void
set_params(
int
rate,
int
len,
float
freq);
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// Process a input array
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gr_complex
batch(
float
*in);
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// Process sample by sample
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void
input(
const
float
&in);
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gr_complex
output();
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bool
ready
()
const
{
return
d_processed == d_len; }
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private
:
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float
d_d1;
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float
d_d2;
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float
d_wr;
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float
d_wi;
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int
d_len;
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int
d_processed;
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};
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}
/* namespace fft */
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}
/* namespace gr */
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#endif
/* INCLUDED_FFT_IMPL_GOERTZEL_H */
gnuradio
gr-fft
include
gnuradio
fft
goertzel.h
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