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// last time modified by Igor UA3DJY on 20200128
#ifndef MODULATOR_HPP__
#define MODULATOR_HPP__
#include <QAudio>
#include <QPointer>
#include "JTDXDateTime.h"
#include "AudioDevice.hpp"
class SoundOutput;
//
// Input device that generates PCM audio frames that encode a message
// and an optional CW ID.
//
// Output can be muted while underway, preserving waveform timing when
// transmission is resumed.
//
class Modulator
: public AudioDevice
{
Q_OBJECT;
public:
enum ModulatorState {Synchronizing, Active, Idle};
Modulator (unsigned frameRate, double periodLengthInSeconds, JTDXDateTime * jtdxtime, QObject * parent = nullptr);
void close () override;
bool isTuning () const {return m_tuning;}
double frequency () const {return m_frequency;}
bool isActive () const {return m_state != Idle;}
void setSpread(double s) {m_fSpread=s;}
void setPeriod(double p) {m_period=p;}
void set_nsym(int n) {m_symbolsLength=n;}
void set_ms0(qint64 ms) {m_ms0=ms;}
Q_SLOT void start (unsigned symbolsLength, double framesPerSymbol, double frequency,
double toneSpacing, SoundOutput *, Channel = Mono,
bool synchronize = true, double dBSNR = 99., double TRperiod=60.0);
Q_SLOT void stop (bool quick = false);
Q_SLOT void tune (bool newState = true);
Q_SLOT void setFrequency (double newFrequency) {m_frequency = newFrequency;}
Q_SIGNAL void stateChanged (ModulatorState) const;
protected:
qint64 readData (char * data, qint64 maxSize) override;
qint64 writeData (char const * /* data */, qint64 /* maxSize */) override
{
return -1; // we don't consume data
}
private:
qint16 postProcessSample (qint16 sample) const;
QPointer<SoundOutput> m_stream;
bool m_quickClose;
unsigned m_symbolsLength;
static double constexpr m_twoPi = 2.0 * 3.141592653589793238462;
unsigned m_nspd = 2048 + 512; // CW ID WPM factor = 22.5 WPM
double m_phi;
double m_dphi;
double m_amp;
double m_nsps;
double volatile m_frequency;
double m_frequency0;
double m_snr;
double m_fac;
double m_toneSpacing;
double m_fSpread;
double m_TRperiod;
double m_period;
qint64 m_silentFrames;
qint64 m_ms0;
qint16 m_ramp;
unsigned m_frameRate;
ModulatorState volatile m_state;
bool volatile m_tuning;
bool m_addNoise;
bool m_bFastMode;
bool m_cwLevel;
unsigned m_ic;
unsigned m_isym0;
int m_j0;
double m_toneFrequency0;
JTDXDateTime * m_jtdxtime;
std::string debug_file_;
};
#endif
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