openmv/common/average.h
2025-11-02 20:59:26 -08:00

58 lines
2.1 KiB
C

/*
* SPDX-License-Identifier: MIT
*
* Copyright (C) 2013-2025 OpenMV, LLC.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* Averaging utility functions.
*/
#ifndef __AVERAGE_H__
#define __AVERAGE_H__
#include <stddef.h>
#include <stdint.h>
typedef struct rgb_moving_average_val {
uint32_t r_value;
uint32_t g_value;
uint32_t b_value;
uint32_t timestamp_ms;
} rgb_moving_average_val_t;
typedef struct rgb_moving_average {
size_t size;
size_t tail;
size_t head;
size_t count;
uint32_t max_ms;
rgb_moving_average_val_t *buffer;
uint64_t r_sum;
uint64_t g_sum;
uint64_t b_sum;
} rgb_moving_average_t;
void rgb_moving_average_init(rgb_moving_average_t *ma, uint32_t max_ms,
size_t size, rgb_moving_average_val_t *buffer);
void rgb_moving_average_update(rgb_moving_average_t *ma,
uint32_t *r_value, uint32_t *g_value, uint32_t *b_value,
uint32_t current_ms);
void rgb_moving_average_get(rgb_moving_average_t *ma, uint32_t *r_value, uint32_t *g_value, uint32_t *b_value);
#endif // __AVERAGE_H__