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162 lines
6.0 KiB
C++
162 lines
6.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2019-2021 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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// Copyright (C) 2020-2024 Jon Beniston, M7RCE <jon@beniston.com> //
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// Copyright (C) 2020 Kacper Michajłow <kasper93@gmail.com> //
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// //
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// This program 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 as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program 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 V3 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 this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef INCLUDE_RADIOCLOCKSINK_H
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#define INCLUDE_RADIOCLOCKSINK_H
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#include <QVector>
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#include <QDateTime>
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#include "dsp/channelsamplesink.h"
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#include "dsp/phasediscri.h"
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#include "dsp/nco.h"
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#include "dsp/interpolator.h"
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#include "util/movingaverage.h"
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#include "util/messagequeue.h"
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#include "radioclocksettings.h"
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#include <vector>
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#include <iostream>
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#include <fstream>
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class ChannelAPI;
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class RadioClock;
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class ScopeVis;
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class RadioClockSink : public ChannelSampleSink {
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public:
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RadioClockSink(RadioClock *radioClock);
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~RadioClockSink();
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virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end);
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void setScopeSink(ScopeVis* scopeSink);
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void applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force = false);
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void applySettings(const RadioClockSettings& settings, bool force = false);
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void setMessageQueueToChannel(MessageQueue *messageQueue) { m_messageQueueToChannel = messageQueue; }
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void setChannel(ChannelAPI *channel) { m_channel = channel; }
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double getMagSq() const { return m_magsq; }
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void getMagSqLevels(double& avg, double& peak, int& nbSamples)
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{
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if (m_magsqCount > 0)
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{
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m_magsq = m_magsqSum / m_magsqCount;
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m_magSqLevelStore.m_magsq = m_magsq;
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m_magSqLevelStore.m_magsqPeak = m_magsqPeak;
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}
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avg = m_magSqLevelStore.m_magsq;
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peak = m_magSqLevelStore.m_magsqPeak;
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nbSamples = m_magsqCount == 0 ? 1 : m_magsqCount;
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m_magsqSum = 0.0f;
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m_magsqPeak = 0.0f;
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m_magsqCount = 0;
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}
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private:
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struct MagSqLevelsStore
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{
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MagSqLevelsStore() :
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m_magsq(1e-12),
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m_magsqPeak(1e-12)
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{}
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double m_magsq;
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double m_magsqPeak;
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};
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ScopeVis* m_scopeSink; // Scope GUI to display debug waveforms
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RadioClock *m_radioClock;
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RadioClockSettings m_settings;
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ChannelAPI *m_channel;
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int m_channelSampleRate;
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int m_channelFrequencyOffset;
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NCO m_nco;
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Interpolator m_interpolator;
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Real m_interpolatorDistance;
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Real m_interpolatorDistanceRemain;
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double m_magsq;
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double m_magsqSum;
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double m_magsqPeak;
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int m_magsqCount;
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MagSqLevelsStore m_magSqLevelStore;
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MessageQueue *m_messageQueueToChannel;
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MovingAverageUtil<Real, double, 80> m_movingAverage; //!< Moving average has sharpest step response of LPFs
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MovingAverageUtil<Real, double, 10*RadioClockSettings::RADIOCLOCK_CHANNEL_SAMPLE_RATE> m_thresholdMovingAverage; // Average over 10 seconds (because VVWB markers are 80% off)
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int m_data; //!< Demod data before clocking
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int m_prevData; //!< Previous value of m_data
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int m_sample; //!< For scope, indicates when data is sampled
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int m_lowCount; //!< Number of consecutive 0 samples
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int m_highCount; //!< Number of consecutive 1 samples
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int m_periodCount; //!< Counts from 1-RADIOCLOCK_CHANNEL_SAMPLE_RATE
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bool m_gotMinuteMarker; //!< Minute marker has been seen
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int m_second; //!< Which second we are in
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int m_timeCode[61]; //!< Timecode from data in each second
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QDateTime m_dateTime; //!< Decoded date and time
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int m_secondMarkers; //!< Counts number of second markers that have been seen
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Real m_threshold; //!< Current threshold for display on scope
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Real m_linearThreshold; //!< settings.m_threshold as a linear value rather than dB
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RadioClockSettings::DST m_dst; //!< Daylight savings time status
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// MSF demod state
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int m_timeCodeB[61];
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// TDF demod state
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PhaseDiscriminators m_phaseDiscri; // FM demodulator
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int m_zeroCount;
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MovingAverageUtil<Real, double, 10> m_fmDemodMovingAverage;
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int m_bits[4];
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ComplexVector m_sampleBuffer[RadioClockSettings::m_scopeStreams];
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static const int m_sampleBufferSize = 60;
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int m_sampleBufferIndex;
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// WWVB state
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bool m_gotMarker; //!< Marker in previous second
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void processOneSample(Complex &ci);
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MessageQueue *getMessageQueueToChannel() { return m_messageQueueToChannel; }
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void sampleToScope(Complex sample);
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int bcd(int firstBit, int lastBit);
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int bcdMSB(int firstBit, int lastBit, int skipBit1=0, int skipBit2=0);
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int xorBits(int firstBit, int lastBit);
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bool evenParity(int firstBit, int lastBit, int parityBit);
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bool oddParity(int firstBit, int lastBit, int parityBit);
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void dcf77();
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void tdf(Complex &ci);
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void msf60();
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void wwvb();
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void jjy();
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};
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#endif // INCLUDE_RADIOCLOCKSINK_H
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