agc.h

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2021, Ideas On Board
 *
 * IPU3 AGC/AEC mean-based control algorithm
 */

#pragma once

#include <linux/intel-ipu3.h>

#include <libcamera/base/utils.h>

#include <libcamera/geometry.h>

#include "libipa/agc_mean_luminance.h"
#include "libipa/histogram.h"

#include "algorithm.h"

namespace libcamera {

struct IPACameraSensorInfo;

namespace ipa::ipu3::algorithms {

class Agc : public Algorithm, public AgcMeanLuminance
{
public:
    Agc();
    ~Agc() = default;

    int init(IPAContext &context, const YamlObject &tuningData) override;
    int configure(IPAContext &context, const IPAConfigInfo &configInfo) override;
    void process(IPAContext &context, const uint32_t frame,
             IPAFrameContext &frameContext,
             const ipu3_uapi_stats_3a *stats,
             ControlList &metadata) override;

private:
    double estimateLuminance(double gain) const override;
    Histogram parseStatistics(const ipu3_uapi_stats_3a *stats,
                  const ipu3_uapi_grid_config &grid);

    utils::Duration minShutterSpeed_;
    utils::Duration maxShutterSpeed_;

    double minAnalogueGain_;
    double maxAnalogueGain_;

    uint32_t stride_;
    double rGain_;
    double gGain_;
    double bGain_;
    ipu3_uapi_grid_config bdsGrid_;
    std::vector<std::tuple<uint8_t, uint8_t, uint8_t>> rgbTriples_;
};

} /* namespace ipa::ipu3::algorithms */

} /* namespace libcamera */