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#include "RateCalculator.h"
void RateCalculator::addBytes(qint64 bytes)
{
if (!m_timer.isValid())
start();
m_segments.prepend(qMakePair(m_timer.restart(), bytes));
m_byteSum += bytes;
}
void RateCalculator::updateTotalBytes(qint64 bytes)
{
addBytes(bytes - m_byteSum);
}
void RateCalculator::start()
{
m_byteSum = 0;
m_segments.clear();
m_timer.restart();
}
void RateCalculator::stop()
{
m_timer.invalidate();
}
void RateCalculator::reset()
{
stop();
start();
}
double RateCalculator::rate(qint64 interval) const
{
qint64 time = 0;
qint64 bytes = 0;
QPair<qint64, qint64> i;
foreach (i, m_segments) {
time += i.first;
bytes += i.second;
if (interval > 0 && time >= interval)
break;
}
return static_cast<double>(bytes) / static_cast<double>(time);
}
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