mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-18 22:31:48 -05:00
786640ee1f
- Run CTCSS filter with reduced rate to much detection - Convert tabs to spaces to be consistent in the file - Fix AF squelch threshold setting after changing SR
148 lines
4.9 KiB
C++
148 lines
4.9 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2019 Edouard Griffiths, F4EXB //
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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_NFMDEMODSINK_H
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#define INCLUDE_NFMDEMODSINK_H
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#include <vector>
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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 "dsp/fftfilt.h"
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#include "dsp/firfilter.h"
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#include "dsp/afsquelch.h"
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#include "dsp/agc.h"
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#include "dsp/ctcssdetector.h"
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#include "util/movingaverage.h"
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#include "util/doublebufferfifo.h"
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#include "audio/audiofifo.h"
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#include "nfmdemodsettings.h"
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class NFMDemodSink : public ChannelSampleSink {
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public:
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NFMDemodSink();
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virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end);
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const Real *getCtcssToneSet(int& nbTones) const {
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nbTones = m_ctcssDetector.getNTones();
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return m_ctcssDetector.getToneSet();
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}
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void setSelectedCtcssIndex(int selectedCtcssIndex) {
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m_ctcssIndexSelected = selectedCtcssIndex;
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}
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bool getSquelchOpen() const { return m_squelchOpen; }
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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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void applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force = false);
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void applySettings(const NFMDemodSettings& settings, bool force = false);
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void setMessageQueueToGUI(MessageQueue *messageQueue) { m_messageQueueToGUI = messageQueue; }
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AudioFifo *getAudioFifo() { return &m_audioFifo; }
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void applyAudioSampleRate(unsigned int sampleRate);
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int getAudioSampleRate() const { return m_audioSampleRate; }
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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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enum RateState {
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RSInitialFill,
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RSRunning
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};
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int m_channelSampleRate;
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int m_channelFrequencyOffset;
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NFMDemodSettings m_settings;
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int m_audioSampleRate;
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AudioVector m_audioBuffer;
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uint m_audioBufferFill;
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AudioFifo m_audioFifo;
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NCO m_nco;
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Interpolator m_interpolator;
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fftfilt m_rfFilter;
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Real m_interpolatorDistance;
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Real m_interpolatorDistanceRemain;
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Lowpass<Real> m_ctcssLowpass;
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Bandpass<Real> m_bandpass;
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Lowpass<Real> m_lowpass;
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CTCSSDetector m_ctcssDetector;
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int m_ctcssIndex; // 0 for nothing detected
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int m_ctcssIndexSelected;
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int m_sampleCount;
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int m_squelchCount;
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int m_squelchGate;
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int m_filterTaps;
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Real m_squelchLevel;
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bool m_squelchOpen;
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bool m_afSquelchOpen;
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double m_magsq; //!< displayed averaged value
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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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MovingAverageUtil<Real, double, 32> m_movingAverage;
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AFSquelch m_afSquelch;
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DoubleBufferFIFO<Real> m_squelchDelayLine;
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PhaseDiscriminators m_phaseDiscri;
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MessageQueue *m_messageQueueToGUI;
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static const double afSqTones[];
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static const double afSqTones_lowrate[];
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static const unsigned FFT_FILTER_LENGTH;
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static const unsigned CTCSS_DETECTOR_RATE;
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void processOneSample(Complex &ci);
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MessageQueue *getMessageQueueToGUI() { return m_messageQueueToGUI; }
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};
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#endif // INCLUDE_NFMDEMODSINK_H
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