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authorPaul Elder <paul.elder@ideasonboard.com>2022-10-22 00:01:50 +0900
committerPaul Elder <paul.elder@ideasonboard.com>2022-11-25 15:37:41 +0900
commitf715a75843edece43acc97a64567d656e9c6df44 (patch)
treebee234f103f75447d82d134394d4c636d05b180a /src/ipa/raspberrypi/controller/rpi/geq.h
parent280e4acf9422821ff9b647e682da9d666c3bb825 (diff)
utils: libtuning: modules: alsc: Add rkisp1 LSC module
Add an LSC module for RkISP1. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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/* SPDX-License-Identifier: BSD-2-Clause */
/*
 * Copyright (C) 2019, Raspberry Pi (Trading) Limited
 *
 * cam_helper_imx219.cpp - camera helper for imx219 sensor
 */

#include <assert.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>

/*
 * We have observed the imx219 embedded data stream randomly return junk
 * reister values.  Do not rely on embedded data until this has been resolved.
 */
#define ENABLE_EMBEDDED_DATA 0

#include "cam_helper.hpp"
#if ENABLE_EMBEDDED_DATA
#include "md_parser.hpp"
#else
#include "md_parser_rpi.hpp"
#endif

using namespace RPi;

/* Metadata parser implementation specific to Sony IMX219 sensors. */

class MdParserImx219 : public MdParserSmia
{
public:
	MdParserImx219();
	Status Parse(void *data) override;
	Status GetExposureLines(unsigned int &lines) override;
	Status GetGainCode(unsigned int &gain_code) override;
private:
	/* Offset of the register's value in the metadata block. */
	int reg_offsets_[3];
	/* Value of the register, once read from the metadata block. */
	int reg_values_[3];
};

class CamHelperImx219 : public CamHelper
{
public:
	CamHelperImx219();
	uint32_t GainCode(double gain) const override;
	double Gain(uint32_t gain_code) const override;
	unsigned int MistrustFramesModeSwitch() const override;
	bool SensorEmbeddedDataPresent() const override;
	CamTransform GetOrientation() const override;
};

CamHelperImx219::CamHelperImx219()
#if ENABLE_EMBEDDED_DATA
	: CamHelper(new MdParserImx219())
#else
	: CamHelper(new MdParserRPi())
#endif
{
}

uint32_t CamHelperImx219::GainCode(double gain) const
{
	return (uint32_t)(256 - 256 / gain);
}

double CamHelperImx219::Gain(uint32_t gain_code) const
{
	return 256.0 / (256 - gain_code);
}

unsigned int CamHelperImx219::MistrustFramesModeSwitch() const
{
	/*
	 * For reasons unknown, we do occasionally get a bogus metadata frame
	 * at a mode switch (though not at start-up). Possibly warrants some
	 * investigation, though not a big deal.
	 */
	return 1;
}

bool CamHelperImx219::SensorEmbeddedDataPresent() const
{
	return ENABLE_EMBEDDED_DATA;
}

CamTransform CamHelperImx219::GetOrientation() const
{
	/* Camera is "upside down" on this board. */
	return CamTransform_HFLIP | CamTransform_VFLIP;
}

static CamHelper *Create()
{
	return new CamHelperImx219();
}

static RegisterCamHelper reg("imx219", &Create);

/*
 * We care about one gain register and a pair of exposure registers. Their I2C
 * addresses from the Sony IMX219 datasheet:
 */
#define GAIN_REG 0x157
#define EXPHI_REG 0x15A
#define EXPLO_REG 0x15B

/*