/* 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(IPAContext &context, 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 minShutterSpeed_; utils::Duration maxShutterSpeed_; double minAnalogueGain_; double maxAnalogueGain_; utils::Duration filteredExposure_; uint32_t stride_; }; } /* namespace ipa::ipu3::algorithms */ } /* namespace libcamera */