39 lines
985 B
C++
39 lines
985 B
C++
/*
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* Delay.h
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*
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* Created on: 2 ìàÿ 2017 ã.
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* Author: titov
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*/
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#ifndef SOURCES_COMMON_DELAY_H_
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#define SOURCES_COMMON_DELAY_H_
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//! Çâåíî çàäåðæêè íà êîëüöåâîì áóôåðå.
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//! T - Òèï äàííûõ.
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//! size - Ðàçìåð áóôåðà, äîëæåí áûòü êðàòåí 2.
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template<typename T, unsigned int size>
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struct Delay {
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private:
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static const unsigned int mask = size - 1; //!< Ìàñêà çàùèòû îò ïåðåïîëíåíèÿ.
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T buff[size]; //!< Áóôåð çàäåðæèûâàåìûõ ýëåìåíòîâ.
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unsigned int index; //!< Òåêóùèé èíäåêñ â ìàññèâå.
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public:
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//! Îïåðàòîð çàäåðæêè.
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T operator()(T item) {
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const unsigned int prev_index(index);
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buff[ ++index & mask ] = item;
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return buff[ ( prev_index ) & mask ];
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}
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//! Îïåðàòîð äîáàâëåíèÿ äàííûõ.
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Delay & operator<<(T item) {
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buff[ ++index & mask ] = item;
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return *this;
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}
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//! Îïåðàòîð ïîëó÷åíèÿ äàííûõ çàïàçäûâàþùèõ íà ïðîèçâîëüíîå êîëè÷åñòâî òàêòîâ.
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T operator[](int i) const {
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return buff[ ( index - i ) & mask ];
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}
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};
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#endif /* SOURCES_COMMON_DELAY_H_ */
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