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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2021, Ideas On Board
*
* ipu3_agc.h - IPU3 AGC/AEC control algorithm
*/
#ifndef __LIBCAMERA_IPU3_AGC_H__
#define __LIBCAMERA_IPU3_AGC_H__
#include <array>
#include <unordered_map>
#include <linux/intel-ipu3.h>
#include <libcamera/base/utils.h>
#include <libcamera/geometry.h>
#include "libipa/algorithm.h"
namespace libcamera {
struct IPACameraSensorInfo;
namespace ipa::ipu3 {
using utils::Duration;
class IPU3Agc : public Algorithm
{
public:
IPU3Agc();
~IPU3Agc() = default;
void initialise(struct ipu3_uapi_grid_config &bdsGrid, const IPACameraSensorInfo &sensorInfo);
void process(const ipu3_uapi_stats_3a *stats, uint32_t &exposure, double &gain);
bool converged() { return converged_; }
bool updateControls() { return updateControls_; }
/* \todo Use a metadata exchange between IPAs */
double gamma() { return gamma_; }
private:
void processBrightness(const ipu3_uapi_stats_3a *stats);
void filterExposure();
void lockExposureGain(uint32_t &exposure, double &gain);
struct ipu3_uapi_grid_config aeGrid_;
uint64_t frameCount_;
uint64_t lastFrame_;
bool converged_;
bool updateControls_;
double iqMean_;
double gamma_;
Duration lineDuration_;
Duration maxExposureTime_;
Duration prevExposure_;
Duration prevExposureNoDg_;
Duration currentExposure_;
Duration currentExposureNoDg_;
};
} /* namespace ipa::ipu3 */
} /* namespace libcamera */
#endif /* __LIBCAMERA_IPU3_AGC_H__ */
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