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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2021-2022, Ideas On Board
*
* agc.h - RkISP1 AGC/AEC mean-based control algorithm
*/
#pragma once
#include <linux/rkisp1-config.h>
#include <libcamera/base/span.h>
#include <libcamera/base/utils.h>
#include <libcamera/geometry.h>
#include "algorithm.h"
namespace libcamera {
namespace ipa::rkisp1::algorithms {
class Agc : public Algorithm
{
public:
Agc();
~Agc() = default;
int configure(IPAContext &context, const IPACameraSensorInfo &configInfo) override;
void queueRequest(IPAContext &context,
const uint32_t frame,
IPAFrameContext &frameContext,
const ControlList &controls) override;
void prepare(IPAContext &context, const uint32_t frame,
IPAFrameContext &frameContext,
rkisp1_params_cfg *params) override;
void process(IPAContext &context, const uint32_t frame,
IPAFrameContext &frameContext,
const rkisp1_stat_buffer *stats,
ControlList &metadata) override;
private:
void computeExposure(IPAContext &Context, IPAFrameContext &frameContext,
double yGain, double iqMeanGain);
utils::Duration filterExposure(utils::Duration exposureValue);
double estimateLuminance(Span<const uint8_t> expMeans, double gain);
double measureBrightness(Span<const uint32_t> hist) const;
void fillMetadata(IPAContext &context, IPAFrameContext &frameContext,
ControlList &metadata);
uint64_t frameCount_;
uint32_t numCells_;
uint32_t numHistBins_;
utils::Duration filteredExposure_;
};
} /* namespace ipa::rkisp1::algorithms */
} /* namespace libcamera */
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