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34 lines
820 B
34 lines
820 B
9 years ago
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/**
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* @file meanbuf.h
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* @author Ondřej Hruška, 2016
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*
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* Averaging float buffer. (You can adjust it to use doubles, if you prefer.)
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*
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* The meanbuf_create() function allocates a buffer.
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*
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* You can then call meanbuf_add() to add a new value into the buffer (and remove the oldest).
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* This function returns the current average value.
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*
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* This buffer can be used for signal smoothing (such as from an analogue sensor).
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*
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* MIT license
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*/
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#pragma once
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#include <stdlib.h>
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#include <stdint.h>
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typedef struct meanbuf_struct MeanBuf;
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/** Init a buffer */
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MeanBuf *meanbuf_create(size_t size);
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/** Deinit a buffer (free buffer array) */
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void meanbuf_destroy(MeanBuf *mb);
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/** Add a value to the buffer. Returns current mean. */
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float meanbuf_add(MeanBuf *mb, float f);
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float meanbuf_current(MeanBuf *bm);
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