GNU Radio 3.7.1 C++ API
goertzel_fc.h
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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2006,2011,2012 Free Software Foundation, Inc.
00004  *
00005  * This file is part of GNU Radio
00006  *
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  *
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 
00023 #ifndef INCLUDED_FFT_GOERTZEL_FC_H
00024 #define INCLUDED_FFT_GOERTZEL_FC_H
00025 
00026 #include <gnuradio/fft/api.h>
00027 #include <gnuradio/sync_decimator.h>
00028 
00029 namespace gr {
00030   namespace fft {
00031 
00032     /*!
00033      * \brief Goertzel single-bin DFT calculation.
00034      * \ingroup fourier_analysis_blk
00035      */
00036     class FFT_API goertzel_fc : virtual public sync_decimator
00037     {
00038     public:
00039 
00040       // gr::fft::goertzel_fc::sptr
00041       typedef boost::shared_ptr<goertzel_fc> sptr;
00042       
00043       static sptr make(int rate, int len, float freq);
00044 
00045       virtual void set_freq (float freq) = 0;
00046 
00047       virtual void set_rate (int rate) = 0;
00048 
00049       virtual float freq() = 0;
00050         
00051       virtual int rate() = 0;
00052     };
00053 
00054   } /* namespace fft */
00055 } /* namespace gr */
00056 
00057 #endif /* INCLUDED_FFT_GOERTZEL_FC_H */