mirror of
https://github.com/f4exb/sdrangel.git
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280 lines
7.5 KiB
C++
280 lines
7.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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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_NFMDEMOD_H
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#define INCLUDE_NFMDEMOD_H
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#include <dsp/basebandsamplesink.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/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/ctcssdetector.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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class NFMDemodGUI;
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class NFMDemod : public BasebandSampleSink {
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public:
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NFMDemod();
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~NFMDemod();
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void configure(MessageQueue* messageQueue,
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Real rfBandwidth,
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Real afBandwidth,
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int fmDeviation,
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Real volume,
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int squelchGate,
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bool deltaSquelch,
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Real squelch,
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bool ctcssOn,
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bool audioMute,
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bool copyAudioToUDP,
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const QString& udpAddress,
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qint16 udpPort,
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bool force);
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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(NFMDemodGUI *nfmDemodGUI) {
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m_nfmDemodGUI = nfmDemodGUI;
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}
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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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Real getMag() { return m_magsq; }
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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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avg = m_magsqCount == 0 ? 1e-10 : m_magsqSum / m_magsqCount;
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m_magsq = avg;
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peak = m_magsqPeak == 0.0 ? 1e-10 : 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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class MsgConfigureNFMDemod : public Message {
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MESSAGE_CLASS_DECLARATION
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public:
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Real getRFBandwidth() const { return m_rfBandwidth; }
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Real getAFBandwidth() const { return m_afBandwidth; }
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int getFMDeviation() const { return m_fmDeviation; }
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Real getVolume() const { return m_volume; }\
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int getSquelchGate() const { return m_squelchGate; }
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bool getDeltaSquelch() const { return m_deltaSquelch; }
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Real getSquelch() const { return m_squelch; }
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bool getCtcssOn() const { return m_ctcssOn; }
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bool getAudioMute() const { return m_audioMute; }
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bool getCopyAudioToUDP() const { return m_copyAudioToUDP; }
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const QString& getUDPAddress() const { return m_udpAddress; }
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quint16 getUDPPort() const { return m_udpPort; }
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bool getForce() const { return m_force; }
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static MsgConfigureNFMDemod* create(Real rfBandwidth,
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Real afBandwidth,
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int fmDeviation,
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Real volume,
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int squelchGate,
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bool deltaSquelch,
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Real squelch,
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bool ctcssOn,
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bool audioMute,
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bool copyAudioToUDP,
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const QString& udpAddress,
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qint16 udpPort,
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bool force)
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{
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return new MsgConfigureNFMDemod(
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rfBandwidth,
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afBandwidth,
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fmDeviation,
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volume,
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squelchGate,
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deltaSquelch,
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squelch,
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ctcssOn,
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audioMute,
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copyAudioToUDP,
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udpAddress,
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udpPort,
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force);
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}
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private:
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Real m_rfBandwidth;
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Real m_afBandwidth;
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int m_fmDeviation;
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Real m_volume;
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int m_squelchGate;
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bool m_deltaSquelch;
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Real m_squelch;
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bool m_ctcssOn;
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bool m_audioMute;
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bool m_copyAudioToUDP;
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QString m_udpAddress;
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quint16 m_udpPort;
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bool m_force;
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MsgConfigureNFMDemod(Real rfBandwidth,
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Real afBandwidth,
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int fmDeviation,
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Real volume,
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int squelchGate,
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bool deltaSquelch,
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Real squelch,
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bool ctcssOn,
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bool audioMute,
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bool copyAudioToUDP,
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const QString& udpAddress,
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qint16 udpPort,
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bool force) :
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Message(),
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m_rfBandwidth(rfBandwidth),
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m_afBandwidth(afBandwidth),
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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_deltaSquelch(deltaSquelch),
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m_squelch(squelch),
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m_ctcssOn(ctcssOn),
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m_audioMute(audioMute),
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m_copyAudioToUDP(copyAudioToUDP),
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m_udpAddress(udpAddress),
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m_udpPort(udpPort),
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m_force(force)
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{ }
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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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struct Config {
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int m_inputSampleRate;
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qint64 m_inputFrequencyOffset;
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Real m_rfBandwidth;
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Real m_afBandwidth;
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int m_fmDeviation;
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int m_squelchGate;
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bool m_deltaSquelch;
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Real m_squelch;
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Real m_volume;
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bool m_ctcssOn;
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bool m_audioMute;
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int m_ctcssIndex;
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quint32 m_audioSampleRate;
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bool m_copyAudioToUDP;
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QString m_udpAddress;
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quint16 m_udpPort;
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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_afBandwidth(-1),
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m_fmDeviation(1),
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m_squelchGate(1),
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m_deltaSquelch(false),
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m_squelch(0),
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m_volume(0),
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m_ctcssOn(false),
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m_audioMute(false),
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m_ctcssIndex(0),
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m_audioSampleRate(0),
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m_copyAudioToUDP(false),
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m_udpAddress("127.0.0.1"),
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m_udpPort(9999)
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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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Lowpass<Real> m_lowpass;
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Bandpass<Real> m_bandpass;
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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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bool m_audioMute;
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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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Real m_lastArgument;
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//Complex m_m1Sample;
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//Complex m_m2Sample;
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MovingAverage<double> m_movingAverage;
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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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//Real m_fmScaling;
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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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UDPSink<qint16> *m_udpBufferAudio;
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NFMDemodGUI *m_nfmDemodGUI;
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QMutex m_settingsMutex;
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PhaseDiscriminators m_phaseDiscri;
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static const int m_udpBlockSize;
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void apply(bool force = false);
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};
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#endif // INCLUDE_NFMDEMOD_H
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