libcamera/libcamera.git - libcamera official repository

path: root/src/ipa/raspberrypi/controller/rpi/lux.hpp

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/* SPDX-License-Identifier: BSD-2-Clause */
/*
 * Copyright (C) 2019, Raspberry Pi Ltd
 *
 * lux.cpp - Lux control algorithm
 */
#include <math.h>

#include <linux/bcm2835-isp.h>

#include <libcamera/base/log.h>

#include "../device_status.h"

#include "lux.h"

using namespace RPiController;
using namespace libcamera;
using namespace std::literals::chrono_literals;

LOG_DEFINE_CATEGORY(RPiLux)

#define NAME "rpi.lux"

Lux::Lux(Controller *controller)
	: Algorithm(controller)
{
	/*
	 * Put in some defaults as there will be no meaningful values until
	 * Process has run.
	 */
	status_.aperture = 1.0;
	status_.lux = 400;
}

char const *Lux::name() const
{
	return NAME;
}

int Lux::read(const libcamera::YamlObject &params)
{
	auto value = params["reference_shutter_speed"].get<double>();
	if (!value)
		return -EINVAL;
	referenceShutterSpeed_ = *value * 1.0us;

	value = params["reference_gain"].get<double>();
	if (!value)
		return -EINVAL;
	referenceGain_ = *value;

	referenceAperture_ = params["reference_aperture"].get<double>(1.0);

	value = params["reference_Y"].get<double>();
	if (!value)
		return -EINVAL;
	referenceY_ = *value;

	value = params["reference_lux"].get<double>();
	if (!value)
		return -EINVAL;
	referenceLux_ = *value;

	currentAperture_ = referenceAperture_;
	return 0;
}

void Lux::setCurrentAperture(double aperture)
{
	currentAperture_ = aperture;
}

void Lux::prepare(Metadata *imageMetadata)
{
	std::unique_lock<std::mutex> lock(mutex_);
	imageMetadata->set("lux.status", status_);
}

void Lux::process(StatisticsPtr &stats, Metadata *imageMetadata)
{
	DeviceStatus deviceStatus;
	if (imageMetadata->get("device.status", deviceStatus) == 0) {


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