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#ifndef INCLUDE_MOVINGAVERAGE_H
#define INCLUDE_MOVINGAVERAGE_H
#include <vector>
#include "dsp/dsptypes.h"
class MovingAverage {
public:
MovingAverage() :
m_history(),
m_sum(0),
m_ptr(0)
{
}
MovingAverage(int historySize, Real initial) :
m_history(historySize, initial),
m_sum(historySize * initial),
m_ptr(0)
{
}
void resize(int historySize, Real initial)
{
m_history.resize(historySize);
for(size_t i = 0; i < m_history.size(); i++)
m_history[i] = initial;
m_sum = m_history.size() * initial;
m_ptr = 0;
}
void feed(Real value)
{
m_sum -= m_history[m_ptr];
m_history[m_ptr] = value;
m_sum += value;
m_ptr++;
if(m_ptr >= m_history.size())
m_ptr = 0;
}
Real average() const
{
return m_sum / (Real)m_history.size();
}
protected:
std::vector<Real> m_history;
Real m_sum;
int m_ptr;
};
#endif // INCLUDE_MOVINGAVERAGE_H
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