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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2021, Ideas On Board
*
* agc.h - IPU3 AGC/AEC mean-based control algorithm
*/
#pragma once
#include <linux/intel-ipu3.h>
#include <libcamera/base/utils.h>
#include <libcamera/geometry.h>
#include "algorithm.h"
namespace libcamera {
struct IPACameraSensorInfo;
namespace ipa::ipu3::algorithms {
class Agc : public Algorithm
{
public:
Agc();
~Agc() = default;
int configure(IPAContext &context, const IPAConfigInfo &configInfo) override;
void process(IPAContext &context, const ipu3_uapi_stats_3a *stats) override;
private:
double measureBrightness(const ipu3_uapi_stats_3a *stats,
const ipu3_uapi_grid_config &grid) const;
utils::Duration filterExposure(utils::Duration currentExposure);
void computeExposure(IPAFrameContext &frameContext, double yGain,
double iqMeanGain);
double estimateLuminance(IPAFrameContext &frameContext,
const ipu3_uapi_grid_config &grid,
const ipu3_uapi_stats_3a *stats,
double gain);
uint64_t frameCount_;
utils::Duration lineDuration_;
utils::Duration minShutterSpeed_;
utils::Duration maxShutterSpeed_;
double minAnalogueGain_;
double maxAnalogueGain_;
utils::Duration filteredExposure_;
uint32_t stride_;
};
} /* namespace ipa::ipu3::algorithms */
} /* namespace libcamera */
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