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https://git.libcamera.org/libcamera/libcamera.git
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579f55b108
Instead of having each CamHelper subclass the MdParserSmia, change the implementation of MdParserSmia to be more generic. The MdParserSmia now gets given a list of registers to search for and helper functions are used to compute exposure lines and gain codes from these registers. Update the imx219 and imx477 CamHelpers by using this new mechanism. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (C) 2020, Raspberry Pi (Trading) Limited
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*
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* cam_helper_imx477.cpp - camera helper for imx477 sensor
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*/
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#include <assert.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "cam_helper.hpp"
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#include "md_parser.hpp"
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using namespace RPiController;
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/*
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* We care about two gain registers and a pair of exposure registers. Their
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* I2C addresses from the Sony IMX477 datasheet:
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*/
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constexpr uint32_t expHiReg = 0x0202;
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constexpr uint32_t expLoReg = 0x0203;
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constexpr uint32_t gainHiReg = 0x0204;
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constexpr uint32_t gainLoReg = 0x0205;
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constexpr std::initializer_list<uint32_t> registerList [[maybe_unused]] = { expHiReg, expLoReg, gainHiReg, gainLoReg };
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class CamHelperImx477 : public CamHelper
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{
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public:
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CamHelperImx477();
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uint32_t GainCode(double gain) const override;
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double Gain(uint32_t gain_code) const override;
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void GetDelays(int &exposure_delay, int &gain_delay,
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int &vblank_delay) const override;
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bool SensorEmbeddedDataPresent() const override;
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private:
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/*
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* Smallest difference between the frame length and integration time,
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* in units of lines.
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*/
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static constexpr int frameIntegrationDiff = 22;
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void PopulateMetadata(const MdParser::RegisterMap ®isters,
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Metadata &metadata) const override;
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};
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CamHelperImx477::CamHelperImx477()
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: CamHelper(std::make_unique<MdParserSmia>(registerList), frameIntegrationDiff)
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{
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}
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uint32_t CamHelperImx477::GainCode(double gain) const
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{
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return static_cast<uint32_t>(1024 - 1024 / gain);
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}
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double CamHelperImx477::Gain(uint32_t gain_code) const
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{
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return 1024.0 / (1024 - gain_code);
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}
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void CamHelperImx477::GetDelays(int &exposure_delay, int &gain_delay,
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int &vblank_delay) const
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{
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exposure_delay = 2;
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gain_delay = 2;
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vblank_delay = 3;
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}
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bool CamHelperImx477::SensorEmbeddedDataPresent() const
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{
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return true;
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}
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void CamHelperImx477::PopulateMetadata(const MdParser::RegisterMap ®isters,
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Metadata &metadata) const
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{
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DeviceStatus deviceStatus;
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deviceStatus.shutter_speed = Exposure(registers.at(expHiReg) * 256 + registers.at(expLoReg));
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deviceStatus.analogue_gain = Gain(registers.at(gainHiReg) * 256 + registers.at(gainLoReg));
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metadata.Set("device.status", deviceStatus);
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}
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static CamHelper *Create()
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{
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return new CamHelperImx477();
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}
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static RegisterCamHelper reg("imx477", &Create);
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