lux.h

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/* SPDX-License-Identifier: BSD-2-Clause */
/*
 * Copyright (C) 2019, Raspberry Pi Ltd
 * Copyright (C) 2024, Paul Elder <paul.elder@ideasonboard.com>
 *
 * Helper class that implements lux estimation
 */

#pragma once

#include <libcamera/base/utils.h>

namespace libcamera {

class YamlObject;

namespace ipa {

class Histogram;

class Lux
{
public:
    Lux();

    int parseTuningData(const YamlObject &tuningData);
    double estimateLux(utils::Duration exposureTime,
               double aGain, double dGain,
               const Histogram &yHist) const;

private:
    utils::Duration referenceExposureTime_;
    double referenceAnalogueGain_;
    double referenceDigitalGain_;
    double referenceY_;
    double referenceLux_;
};

} /* namespace ipa */

} /* namespace libcamera */