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sdrangel/plugins/channelrx/demodnfm/nfmdemod.h

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///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel //
// //
// 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 //
// //
// 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_NFMDEMOD_H
#define INCLUDE_NFMDEMOD_H
#include <dsp/basebandsamplesink.h>
#include <dsp/phasediscri.h>
#include <QMutex>
#include <vector>
#include "dsp/nco.h"
#include "dsp/interpolator.h"
#include "dsp/lowpass.h"
#include "dsp/bandpass.h"
#include "dsp/afsquelch.h"
#include "dsp/agc.h"
#include "dsp/ctcssdetector.h"
#include "dsp/afsquelch.h"
#include "audio/audiofifo.h"
#include "util/message.h"
class NFMDemodGUI;
class NFMDemod : public BasebandSampleSink {
public:
NFMDemod();
~NFMDemod();
void configure(MessageQueue* messageQueue,
Real rfBandwidth,
Real afBandwidth,
int fmDeviation,
Real volume,
int squelchGate,
bool deltaSquelch,
Real squelch,
bool ctcssOn,
bool audioMute,
bool copyAudioToUDP,
const QString& udpAddress,
qint16 udpPort,
bool force);
virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool po);
virtual void start();
virtual void stop();
virtual bool handleMessage(const Message& cmd);
void registerGUI(NFMDemodGUI *nfmDemodGUI) {
m_nfmDemodGUI = nfmDemodGUI;
}
const Real *getCtcssToneSet(int& nbTones) const {
nbTones = m_ctcssDetector.getNTones();
return m_ctcssDetector.getToneSet();
}
void setSelectedCtcssIndex(int selectedCtcssIndex) {
m_ctcssIndexSelected = selectedCtcssIndex;
}
Real getMag() { return m_magsq; }
bool getSquelchOpen() const { return m_squelchOpen; }
void getMagSqLevels(double& avg, double& peak, int& nbSamples)
{
avg = m_magsqCount == 0 ? 1e-10 : m_magsqSum / m_magsqCount;
m_magsq = avg;
peak = m_magsqPeak == 0.0 ? 1e-10 : m_magsqPeak;
nbSamples = m_magsqCount == 0 ? 1 : m_magsqCount;
m_magsqSum = 0.0f;
m_magsqPeak = 0.0f;
m_magsqCount = 0;
}
private:
class MsgConfigureNFMDemod : public Message {
MESSAGE_CLASS_DECLARATION
public:
Real getRFBandwidth() const { return m_rfBandwidth; }
Real getAFBandwidth() const { return m_afBandwidth; }
int getFMDeviation() const { return m_fmDeviation; }
Real getVolume() const { return m_volume; }\
int getSquelchGate() const { return m_squelchGate; }
bool getDeltaSquelch() const { return m_deltaSquelch; }
Real getSquelch() const { return m_squelch; }
bool getCtcssOn() const { return m_ctcssOn; }
bool getAudioMute() const { return m_audioMute; }
bool getCopyAudioToUDP() const { return m_copyAudioToUDP; }
const QString& getUDPAddress() const { return m_udpAddress; }
quint16 getUDPPort() const { return m_udpPort; }
bool getForce() const { return m_force; }
static MsgConfigureNFMDemod* create(Real rfBandwidth,
Real afBandwidth,
int fmDeviation,
Real volume,
int squelchGate,
bool deltaSquelch,
Real squelch,
bool ctcssOn,
bool audioMute,
bool copyAudioToUDP,
const QString& udpAddress,
qint16 udpPort,
bool force)
{
return new MsgConfigureNFMDemod(
rfBandwidth,
afBandwidth,
fmDeviation,
volume,
squelchGate,
deltaSquelch,
squelch,
ctcssOn,
audioMute,
copyAudioToUDP,
udpAddress,
udpPort,
force);
}
private:
Real m_rfBandwidth;
Real m_afBandwidth;
int m_fmDeviation;
Real m_volume;
int m_squelchGate;
bool m_deltaSquelch;
Real m_squelch;
bool m_ctcssOn;
bool m_audioMute;
bool m_copyAudioToUDP;
QString m_udpAddress;
quint16 m_udpPort;
bool m_force;
MsgConfigureNFMDemod(Real rfBandwidth,
Real afBandwidth,
int fmDeviation,
Real volume,
int squelchGate,
bool deltaSquelch,
Real squelch,
bool ctcssOn,
bool audioMute,
bool copyAudioToUDP,
const QString& udpAddress,
qint16 udpPort,
bool force) :
Message(),
m_rfBandwidth(rfBandwidth),
m_afBandwidth(afBandwidth),
m_fmDeviation(fmDeviation),
m_volume(volume),
m_squelchGate(squelchGate),
m_deltaSquelch(deltaSquelch),
m_squelch(squelch),
m_ctcssOn(ctcssOn),
m_audioMute(audioMute),
m_copyAudioToUDP(copyAudioToUDP),
m_udpAddress(udpAddress),
m_udpPort(udpPort),
m_force(force)
{ }
};
enum RateState {
RSInitialFill,
RSRunning
};
struct Config {
int m_inputSampleRate;
qint64 m_inputFrequencyOffset;
Real m_rfBandwidth;
Real m_afBandwidth;
int m_fmDeviation;
int m_squelchGate;
bool m_deltaSquelch;
Real m_squelch;
Real m_volume;
bool m_ctcssOn;
bool m_audioMute;
int m_ctcssIndex;
quint32 m_audioSampleRate;
bool m_copyAudioToUDP;
QString m_udpAddress;
quint16 m_udpPort;
Config() :
m_inputSampleRate(-1),
m_inputFrequencyOffset(0),
m_rfBandwidth(-1),
m_afBandwidth(-1),
m_fmDeviation(1),
m_squelchGate(1),
m_deltaSquelch(false),
m_squelch(0),
m_volume(0),
m_ctcssOn(false),
m_audioMute(false),
m_ctcssIndex(0),
m_audioSampleRate(0),
m_copyAudioToUDP(false),
m_udpAddress("127.0.0.1"),
m_udpPort(9999)
{ }
};
Config m_config;
Config m_running;
NCO m_nco;
Interpolator m_interpolator;
Real m_interpolatorDistance;
Real m_interpolatorDistanceRemain;
Lowpass<Real> m_lowpass;
Bandpass<Real> m_bandpass;
CTCSSDetector m_ctcssDetector;
int m_ctcssIndex; // 0 for nothing detected
int m_ctcssIndexSelected;
int m_sampleCount;
int m_squelchCount;
int m_squelchGate;
bool m_audioMute;
Real m_squelchLevel;
bool m_squelchOpen;
bool m_afSquelchOpen;
double m_magsq; //!< displayed averaged value
double m_magsqSum;
double m_magsqPeak;
int m_magsqCount;
Real m_lastArgument;
//Complex m_m1Sample;
//Complex m_m2Sample;
MovingAverage<double> m_movingAverage;
AFSquelch m_afSquelch;
Real m_agcLevel; // AGC will aim to this level
Real m_agcFloor; // AGC will not go below this level
Real m_fmExcursion;
//Real m_fmScaling;
AudioVector m_audioBuffer;
uint m_audioBufferFill;
AudioFifo m_audioFifo;
UDPSink<qint16> *m_udpBufferAudio;
NFMDemodGUI *m_nfmDemodGUI;
QMutex m_settingsMutex;
PhaseDiscriminators m_phaseDiscri;
static const int m_udpBlockSize;
void apply(bool force = false);
};
#endif // INCLUDE_NFMDEMOD_H
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