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https://github.com/gqrx-sdr/gqrx.git
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77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright 2011 Alexandru Csete OZ9AEC.
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*
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* Gqrx 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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* Gqrx 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 Gqrx; 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 RX_DEMOD_AM_H
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#define RX_DEMOD_AM_H
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#include <gr_hier_block2.h>
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#include <gr_complex_to_xxx.h>
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#include <gr_add_const_ff.h>
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class rx_demod_am;
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typedef boost::shared_ptr<rx_demod_am> rx_demod_am_sptr;
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/*! \brief Return a shared_ptr to a new instance of rx_demod_am.
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* \param quad_rate The input sample rate.
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* \param audio_rate The audio rate.
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* \param dcr Enable DCR
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*
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* This is effectively the public constructor.
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*/
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rx_demod_am_sptr make_rx_demod_am(float quad_rate, float audio_rate, bool dcr=true);
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/*! \brief AM demodulator.
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* \ingroup DSP
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*
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* This class implements the AM demodulator.
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* AM demodulation is simply a conversion from complex to magnitude.
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* This block does not include any audio filter.
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*
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*/
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class rx_demod_am : public gr_hier_block2
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{
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public:
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rx_demod_am(float quad_rate=48000.0, float audio_rate=48000.0, bool dcr=true); // FIXME: could be private
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~rx_demod_am();
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void set_dcr(bool dcr);
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bool dcr();
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private:
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/* GR blocks */
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gr_complex_to_mag_sptr d_demod; /*! AM demodulation (complex to magnitude). */
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gr_add_const_ff_sptr d_dcr; /*! DC removal (substract 1.0). */
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/* other parameters */
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float d_quad_rate; /*! Quadrature rate. */
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float d_audio_rate; /*! Audio rate. */
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bool d_dcr_enabled; /*! DC removal flag. */
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};
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#endif // RX_DEMOD_AM_H
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