Modulator.h

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#ifndef MODULATOR_HPP__
#define MODULATOR_HPP__
 
#include "JS8_Audio/AudioDevice.h"
 
#include <QAudio>
#include <QPointer>
 
class SoundOutput;

class Modulator final : public AudioDevice {
    Q_OBJECT;
 
  public:
    enum class State { Synchronizing, Active, Idle };

    explicit Modulator(QObject *parent = nullptr) : AudioDevice{parent} {}

    bool isIdle() const { return m_state.load() == State::Idle; }
 
    // Manipulators

    void close() override;

    Q_SLOT void setAudioFrequency(double const audioFrequency) {
        m_audioFrequency = audioFrequency;
    }
 
    // Slots

    Q_SLOT void start(double audioFrequency, int submode, double tx_delay,
                      SoundOutput *stream, Channel channel);

    Q_SLOT void stop(bool quick = false);

    Q_SLOT void tune(bool state = true);
 
  protected:
    // QIODevice protocol
 
    qint64 readData(char *, qint64) override;
    qint64 writeData(char const *, qint64) override { return -1; }

    qint64 bytesAvailable() const override { return 8000; }
 
  private:
    // Data members
 
    QPointer<SoundOutput> m_stream;
    std::atomic<State> m_state = State::Idle;
    bool m_quickClose = false;
    bool m_tuning = false;
    double m_audioFrequency;
    double m_audioFrequency0;
    double m_toneSpacing;
    double m_phi;
    double m_dphi;
    double m_amp;
    double m_nsps;
    qint64 m_silentFrames;
    unsigned m_ic;
    unsigned m_isym0;
};
 
#endif