sdrangel/plugins/channelrx/radioclock/radioclocksink.h

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///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2019 Edouard Griffiths, F4EXB //
// Copyright (C) 2021 Jon Beniston, M7RCE //
// //
// 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 //
// (at your option) any later version. //
// //
// 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 INCLUDE_RADIOCLOCKSINK_H
#define INCLUDE_RADIOCLOCKSINK_H
#include <QVector>
#include <QDateTime>
#include "dsp/channelsamplesink.h"
#include "dsp/phasediscri.h"
#include "dsp/nco.h"
#include "dsp/interpolator.h"
#include "dsp/firfilter.h"
#include "dsp/fftfactory.h"
#include "dsp/fftengine.h"
#include "dsp/fftwindow.h"
#include "util/movingaverage.h"
#include "util/doublebufferfifo.h"
#include "util/messagequeue.h"
#include "radioclocksettings.h"
#include <vector>
#include <iostream>
#include <fstream>
class ChannelAPI;
class RadioClock;
class ScopeVis;
class RadioClockSink : public ChannelSampleSink {
public:
RadioClockSink(RadioClock *radioClock);
~RadioClockSink();
virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end);
void setScopeSink(ScopeVis* scopeSink);
void applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force = false);
void applySettings(const RadioClockSettings& settings, bool force = false);
void setMessageQueueToChannel(MessageQueue *messageQueue) { m_messageQueueToChannel = messageQueue; }
void setChannel(ChannelAPI *channel) { m_channel = channel; }
double getMagSq() const { return m_magsq; }
void getMagSqLevels(double& avg, double& peak, int& nbSamples)
{
if (m_magsqCount > 0)
{
m_magsq = m_magsqSum / m_magsqCount;
m_magSqLevelStore.m_magsq = m_magsq;
m_magSqLevelStore.m_magsqPeak = m_magsqPeak;
}
avg = m_magSqLevelStore.m_magsq;
peak = m_magSqLevelStore.m_magsqPeak;
nbSamples = m_magsqCount == 0 ? 1 : m_magsqCount;
m_magsqSum = 0.0f;
m_magsqPeak = 0.0f;
m_magsqCount = 0;
}
private:
struct MagSqLevelsStore
{
MagSqLevelsStore() :
m_magsq(1e-12),
m_magsqPeak(1e-12)
{}
double m_magsq;
double m_magsqPeak;
};
ScopeVis* m_scopeSink; // Scope GUI to display debug waveforms
RadioClock *m_radioClock;
RadioClockSettings m_settings;
ChannelAPI *m_channel;
int m_channelSampleRate;
int m_channelFrequencyOffset;
NCO m_nco;
Interpolator m_interpolator;
Real m_interpolatorDistance;
Real m_interpolatorDistanceRemain;
double m_magsq;
double m_magsqSum;
double m_magsqPeak;
int m_magsqCount;
MagSqLevelsStore m_magSqLevelStore;
MessageQueue *m_messageQueueToChannel;
MovingAverageUtil<Real, double, 80> m_movingAverage; //!< Moving average has sharpest step response of LPFs
MovingAverageUtil<Real, double, 10*RadioClockSettings::RADIOCLOCK_CHANNEL_SAMPLE_RATE> m_thresholdMovingAverage; // Average over 10 seconds (because VVWB markers are 80% off)
int m_data; //!< Demod data before clocking
int m_prevData; //!< Previous value of m_data
int m_sample; //!< For scope, indicates when data is sampled
int m_lowCount; //!< Number of consecutive 0 samples
int m_highCount; //!< Number of consecutive 1 samples
int m_periodCount; //!< Counts from 1-RADIOCLOCK_CHANNEL_SAMPLE_RATE
bool m_gotMinuteMarker; //!< Minute marker has been seen
int m_second; //!< Which second we are in
int m_timeCode[61]; //!< Timecode from data in each second
QDateTime m_dateTime; //!< Decoded date and time
int m_secondMarkers; //!< Counts number of second markers that have been seen
Real m_threshold; //!< Current threshold for display on scope
Real m_linearThreshold; //!< settings.m_threshold as a linear value rather than dB
RadioClockSettings::DST m_dst; //!< Daylight savings time status
// MSF demod state
int m_timeCodeB[61];
// TDF demod state
PhaseDiscriminators m_phaseDiscri; // FM demodulator
int m_zeroCount;
MovingAverageUtil<Real, double, 10> m_fmDemodMovingAverage;
int m_bits[4];
ComplexVector m_sampleBuffer[RadioClockSettings::m_scopeStreams];
static const int m_sampleBufferSize = 60;
int m_sampleBufferIndex;
// WWVB state
bool m_gotMarker; //!< Marker in previous second
void processOneSample(Complex &ci);
MessageQueue *getMessageQueueToChannel() { return m_messageQueueToChannel; }
void sampleToScope(Complex sample);
int bcd(int firstBit, int lastBit);
int bcdMSB(int firstBit, int lastBit, int skipBit1=0, int skipBit2=0);
int xorBits(int firstBit, int lastBit);
bool evenParity(int firstBit, int lastBit, int parityBit);
bool oddParity(int firstBit, int lastBit, int parityBit);
void dcf77();
void tdf(Complex &ci);
void msf60();
void wwvb();
};
#endif // INCLUDE_RADIOCLOCKSINK_H