mirror of https://github.com/saitohirga/WSJT-X.git
82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
#ifndef MODULATOR_HPP__
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#define MODULATOR_HPP__
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#include <vector>
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#include <QIODevice>
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#include <QScopedPointer>
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//
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// Input device that generates PCM audio frames that encode a message
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// and an optional CW ID.
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//
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// Output can be muted while underway, preserving waveform timing when
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// transmission is resumed.
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//
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class Modulator : public QIODevice
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{
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Q_OBJECT;
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Q_PROPERTY (unsigned frequency READ frequency WRITE setFrequency);
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Q_PROPERTY (bool tuning READ isTuning WRITE tune);
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Q_PROPERTY (bool muted READ isMuted WRITE mute);
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private:
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Q_DISABLE_COPY (Modulator);
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public:
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Modulator (unsigned frameRate, unsigned periodLengthInSeconds, QObject * parent = 0);
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bool isTuning () const {return m_tuning;}
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Q_SLOT void tune (bool newState = true) {m_tuning = newState;}
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bool isMuted () const {return m_muted;}
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Q_SLOT void mute (bool newState = true) {m_muted = newState;}
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unsigned frequency () const {return m_frequency;}
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Q_SLOT void setFrequency (unsigned newFrequency) {m_frequency = newFrequency;}
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bool open (std::vector<int> const * symbols, std::vector<int> const * cw, double framesPerSymbol, unsigned frequency, double dBSNR = 99.);
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bool isSequential () const
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{
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return true;
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}
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protected:
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qint64 readData (char * data, qint64 maxSize);
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qint64 writeData (char const * /* data */, qint64 /* maxSize */)
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{
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return -1; // we don't consume data
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}
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private:
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typedef short frame_t;
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frame_t postProcessFrame (frame_t frame) const;
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QScopedPointer<std::vector<int> const> m_symbols;
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QScopedPointer<std::vector<int> const> m_cw;
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static double const m_twoPi;
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static unsigned const m_nspd; // CW ID WPM factor
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int m_frameRate;
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int m_period;
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double m_nsps;
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double m_frequency;
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double m_snr;
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enum {Idle, Active, Done} m_state;
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bool m_tuning;
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bool m_muted;
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bool m_addNoise;
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double m_phi;
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double m_dphi;
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double m_amp;
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unsigned m_ic;
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double m_fac;
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unsigned m_isym0;
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};
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#endif
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