sdrangel/plugins/channelrx/demodbfm/rdsdemod.h

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///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015 F4EXB //
// written by Edouard Griffiths //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef PLUGINS_CHANNEL_BFM_RDSDEMOD_H_
#define PLUGINS_CHANNEL_BFM_RDSDEMOD_H_
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#include <QObject>
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//#include "util/udpsink.h" // UDP debug
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#include "dsp/dsptypes.h"
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class RDSDemod : public QObject
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{
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Q_OBJECT
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public:
RDSDemod();
~RDSDemod();
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void setSampleRate(int srate);
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bool process(Real rdsSample, bool &bit);
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struct{
Real acc;
Real qua;
Real fclk;
} m_report;
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protected:
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bool biphase(Real acc, bool &bit, Real d_cphi);
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Real filter_lp_2400_iq(Real in, int iqIndex);
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Real filter_lp_pll(Real input);
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int sign(Real a);
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private:
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struct
{
double subcarr_phi;
Real subcarr_bb[2];
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double clock_offset;
double clock_phi;
double prev_clock_phi;
Real lo_clock;
Real prev_lo_clock;
Real prev_bb;
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double d_cphi;
Real acc;
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int numsamples;
Real prev_acc;
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int counter;
int reading_frame;
int tot_errs[2];
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int dbit;
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} m_parms;
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Real m_xv[2][2+1];
Real m_yv[2][2+1];
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Real m_xw[1+1];
Real m_yw[1+1];
Real m_prev;
int m_srate;
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//UDPSink<Real> m_udpDebug; // UDP debug
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static const Real m_pllBeta;
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static const Real m_fsc;
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};
#endif /* PLUGINS_CHANNEL_BFM_RDSDEMOD_H_ */