ipa: rpi: Add "focus" algorithm

Adds FocusStatus to the image metadata, containing contrast measurements
across the image. Optionally also prints a contrast measure to the
console, to aid in manual adjustment of the lens. Note that it is not an
actual auto-focus algorithm that can drive a lens!

Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
David Plowman 2020-05-28 15:51:32 +01:00 committed by Laurent Pinchart
parent 0952f2014d
commit 23e15e72f9
5 changed files with 113 additions and 0 deletions

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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2020, Raspberry Pi (Trading) Limited
*
* focus_status.h - focus measurement status
*/
#pragma once
#include <linux/bcm2835-isp.h>
// The focus algorithm should post the following structure into the image's
// "focus.status" metadata. Recall that it's only reporting focus (contrast)
// measurements, it's not driving any kind of auto-focus algorithm!
#ifdef __cplusplus
extern "C" {
#endif
struct FocusStatus {
int num;
uint32_t focus_measures[FOCUS_REGIONS];
};
#ifdef __cplusplus
}
#endif