vuMeterWidget.hpp

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#ifndef VUMETERWIDGET_HPP
#define VUMETERWIDGET_HPP
 
#include <QTimer>
#include <QWidget>
#include <QPaintEvent>
#include <memory>
#include <atomic>
#include <chrono>
#include <string_view>
 
class ControlPort;
 
class VuMeterWidget : public QWidget{
        Q_OBJECT
public:
        VuMeterWidget(QWidget *parent);
 
        void parseLine(std::string_view line);
        void setControlPort(ControlPort *controlPort);
        void setParsePrefix(std::string_view prefix);
 
        void setOnRightSide(bool side) { onRightSide = side; }
 
protected:
        void paintEvent(QPaintEvent *paintEvent);
 
private:
        using clock = std::chrono::steady_clock;
        struct PeakMaximum {
                double val = 0;
                clock::time_point ts;
        };
 
        static const int max_channels = 8;
        std::string parsePrefix = "stats ARECV";
 
        int channels = 0;
        double peak[max_channels];
        double rms[max_channels];
 
        double barLevel[max_channels];
        double rmsLevel[max_channels];
        PeakMaximum maximumLevel[max_channels];
 
        bool onRightSide = false;
 
        QTimer timer;
        int updatesPerSecond;
        clock::time_point lastUpdate;
 
        ControlPort *controlPort = nullptr;
        bool connected = false;
 
        void paintMeter(QPainter&, int x, int y, int width, int height, double peak, double rms, double maxPeak);
        void paintScale(QPainter&, int x, int y, int width, int height, bool leftTicks, bool rightTicks);
 
public slots:
        void updateVal();
 
private slots:
        void onControlPortConnect();
};
 
#endif