mirror of https://github.com/f4exb/sdrangel.git
54 lines
883 B
C++
54 lines
883 B
C++
#ifndef INCLUDE_MOVINGAVERAGE_H
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#define INCLUDE_MOVINGAVERAGE_H
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#include <vector>
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#include "dsp/dsptypes.h"
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class MovingAverage {
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public:
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MovingAverage() :
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m_history(),
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m_sum(0),
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m_ptr(0)
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{
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}
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MovingAverage(int historySize, Real initial) :
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m_history(historySize, initial),
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m_sum(historySize * initial),
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m_ptr(0)
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{
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}
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void resize(int historySize, Real initial)
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{
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m_history.resize(historySize);
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for(size_t i = 0; i < m_history.size(); i++)
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m_history[i] = initial;
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m_sum = m_history.size() * initial;
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m_ptr = 0;
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}
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void feed(Real value)
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{
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m_sum -= m_history[m_ptr];
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m_history[m_ptr] = value;
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m_sum += value;
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m_ptr++;
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if(m_ptr >= m_history.size())
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m_ptr = 0;
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}
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Real average() const
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{
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return m_sum / (Real)m_history.size();
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}
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protected:
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std::vector<Real> m_history;
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Real m_sum;
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uint m_ptr;
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};
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#endif // INCLUDE_MOVINGAVERAGE_H
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