mirror of
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195 lines
5.1 KiB
C++
195 lines
5.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2015 F4EXB //
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// written by Edouard Griffiths //
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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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// //
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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_DSDDEMOD_H
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#define INCLUDE_DSDDEMOD_H
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#include <dsp/phasediscri.h>
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#include <QMutex>
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#include <vector>
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#include "dsp/samplesink.h"
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#include "dsp/nco.h"
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#include "dsp/interpolator.h"
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#include "dsp/lowpass.h"
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#include "dsp/bandpass.h"
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#include "dsp/afsquelch.h"
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#include "dsp/agc.h"
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#include "dsp/afsquelch.h"
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#include "audio/audiofifo.h"
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#include "util/message.h"
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#include "dsddecoder.h"
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class DSDDemodGUI;
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class DSDDemod : public SampleSink {
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public:
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DSDDemod(SampleSink* sampleSink);
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~DSDDemod();
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void configure(MessageQueue* messageQueue,
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int rfBandwidth,
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int demodGain,
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int volume,
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int fmDeviation,
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int squelchGate,
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Real squelch,
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bool audioMute);
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virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool po);
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virtual void start();
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virtual void stop();
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virtual bool handleMessage(const Message& cmd);
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void registerGUI(DSDDemodGUI *dsdDemodGUI) {
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m_dsdDemodGUI = dsdDemodGUI;
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}
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Real getMag() { return m_AGC.getAverage() / (1<<15); }
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bool getSquelchOpen() const { return m_squelchOpen; }
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private:
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class MsgConfigureDSDDemod : public Message {
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MESSAGE_CLASS_DECLARATION
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public:
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int getRFBandwidth() const { return m_rfBandwidth; }
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int getDemodGain() const { return m_demodGain; }
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int getFMDeviation() const { return m_fmDeviation; }
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int getVolume() const { return m_volume; }
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int getSquelchGate() const { return m_squelchGate; }
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Real getSquelch() const { return m_squelch; }
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bool getAudioMute() const { return m_audioMute; }
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static MsgConfigureDSDDemod* create(int rfBandwidth,
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int demodGain,
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int fmDeviation,
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int volume,
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int squelchGate,
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Real squelch,
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bool audioMute)
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{
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return new MsgConfigureDSDDemod(rfBandwidth, demodGain, fmDeviation, volume, squelchGate, squelch, audioMute);
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}
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private:
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Real m_rfBandwidth;
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Real m_demodGain;
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int m_fmDeviation;
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int m_volume;
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int m_squelchGate;
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Real m_squelch;
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bool m_audioMute;
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MsgConfigureDSDDemod(int rfBandwidth,
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int demodGain,
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int fmDeviation,
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int volume,
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int squelchGate,
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Real squelch,
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bool audioMute) :
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Message(),
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m_rfBandwidth(rfBandwidth),
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m_demodGain(demodGain),
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m_fmDeviation(fmDeviation),
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m_volume(volume),
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m_squelchGate(squelchGate),
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m_squelch(squelch),
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m_audioMute(audioMute)
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{ }
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};
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struct AudioSample {
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qint16 l;
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qint16 r;
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};
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typedef std::vector<AudioSample> AudioVector;
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enum RateState {
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RSInitialFill,
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RSRunning
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};
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struct Config {
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int m_inputSampleRate;
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qint64 m_inputFrequencyOffset;
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int m_rfBandwidth;
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int m_demodGain;
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int m_volume;
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int m_fmDeviation;
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int m_squelchGate;
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Real m_squelch;
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bool m_audioMute;
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quint32 m_audioSampleRate;
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Config() :
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m_inputSampleRate(-1),
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m_inputFrequencyOffset(0),
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m_rfBandwidth(-1),
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m_demodGain(-1),
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m_volume(-1),
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m_fmDeviation(1),
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m_squelchGate(1),
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m_squelch(0),
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m_audioMute(false),
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m_audioSampleRate(0)
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{ }
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};
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Config m_config;
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Config m_running;
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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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int m_sampleCount;
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int m_squelchCount;
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int m_agcAttack;
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bool m_audioMute;
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double m_squelchLevel;
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bool m_squelchOpen;
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Real m_lastArgument;
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MagAGC m_AGC;
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AFSquelch m_afSquelch;
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Real m_agcLevel; // AGC will aim to this level
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Real m_agcFloor; // AGC will not go below this level
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Real m_fmExcursion;
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qint16 *m_dsdInBuffer; //!< Input buffer for DSD decoder process
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int m_dsdInCount;
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SampleVector m_scopeSampleBuffer;
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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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SampleSink* m_scope;
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bool m_scopeEnabled;
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DSDDecoder m_dsdDecoder;
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DSDDemodGUI *m_dsdDemodGUI;
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QMutex m_settingsMutex;
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PhaseDiscriminators m_phaseDiscri;
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void apply();
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};
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#endif // INCLUDE_DSDDEMOD_H
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