/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2021, Google Inc. * * camera_sensor_helper.h - Helper class that performs sensor-specific parameter computations */ #pragma once #include <stdint.h> #include <memory> #include <string> #include <vector> #include <libcamera/base/class.h> namespace libcamera { namespace ipa { class CameraSensorHelper { public: CameraSensorHelper() = default; virtual ~CameraSensorHelper() = default; virtual uint32_t gainCode(double gain) const; virtual double gain(uint32_t gainCode) const; protected: enum AnalogueGainType { AnalogueGainLinear, AnalogueGainExponential, }; struct AnalogueGainConstants { AnalogueGainType type; int16_t m0; int16_t c0; int16_t m1; int16_t c1; }; AnalogueGainConstants analogueGainConstants_; private: LIBCAMERA_DISABLE_COPY_AND_MOVE(CameraSensorHelper) }; class CameraSensorHelperFactory { public: CameraSensorHelperFactory(const std::string name); virtual ~CameraSensorHelperFactory() = default; static std::unique_ptr<CameraSensorHelper> create(const std::string &name); static void registerType(CameraSensorHelperFactory *factory); static std::vector<CameraSensorHelperFactory *> &factories(); protected: virtual CameraSensorHelper *createInstance() = 0; private: LIBCAMERA_DISABLE_COPY_AND_MOVE(CameraSensorHelperFactory) std::string name_; }; #define REGISTER_CAMERA_SENSOR_HELPER(name, helper) \ class helper##Factory final : public CameraSensorHelperFactory \ { \ public: \ helper##Factory() : CameraSensorHelperFactory(name) {} \ \ private: \ CameraSensorHelper *createInstance() \ { \ return new helper(); \ } \ }; \ static helper##Factory global_##helper##Factory; } /* namespace ipa */ } /* namespace libcamera */