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41 lines
844 B
C
41 lines
844 B
C
#ifndef SC_AVERAGE
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#define SC_AVERAGE
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#include "common.h"
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#include <stdbool.h>
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#include <stdint.h>
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struct sc_average {
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// Current average value
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float avg;
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// Target range, to update the average as follow:
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// avg = ((range - 1) * avg + new_value) / range
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unsigned range;
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// Number of values pushed when less than range (count <= range).
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// The purpose is to handle the first (range - 1) values properly.
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unsigned count;
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};
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void
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sc_average_init(struct sc_average *avg, unsigned range);
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/**
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* Push a new value to update the "rolling" average
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*/
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void
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sc_average_push(struct sc_average *avg, float value);
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/**
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* Get the current average value
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*
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* It is an error to call this function if sc_average_push() has not been
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* called at least once.
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*/
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float
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sc_average_get(struct sc_average *avg);
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#endif
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