DataRateTracker.h

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#pragma once
 
#include <QtCore/QElapsedTimer>
#include <QtCore/QtGlobal>
 
class DataRateTracker
{
public:
    DataRateTracker();
 
    void recordBytes(qsizetype bytes);
 
    quint64 totalBytes() const { return _totalBytes; }
 
    double bytesPerSec() const { return _currentRate; }
 
    double kBps() const { return _currentRate / 1024.0; }
 
    bool rateUpdated() const { return _rateUpdated; }
 
    void reset();
 
private:
    QElapsedTimer _timer;
    quint64 _totalBytes = 0;
    qsizetype _windowBytes = 0;
    double _currentRate = 0.0;
    bool _rateUpdated = false;
 
    static constexpr qint64 kWindowMs = 1000;
};