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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2024, Raspberry Pi Ltd
*
* cam_helper_Imx283.cpp - camera information for Imx283 sensor
*/
#include <assert.h>
#include "cam_helper.h"
#include "math.h"
using namespace RPiController;
class CamHelperImx283 : public CamHelper
{
public:
CamHelperImx283();
uint32_t gainCode(double gain) const override;
double gain(uint32_t gainCode) const override;
void getDelays(int &exposureDelay, int &gainDelay,
int &vblankDelay, int &hblankDelay) const override;
unsigned int hideFramesModeSwitch() const override;
private:
/*
* Smallest difference between the frame length and integration time,
* in units of lines.
*/
static constexpr int frameIntegrationDiff = 4;
};
/*
* Imx283 doesn't output metadata, so we have to use the delayed controls which
* works by counting frames.
*/
CamHelperImx283::CamHelperImx283()
: CamHelper({}, frameIntegrationDiff)
{
}
uint32_t CamHelperImx283::gainCode(double gain) const
{
return static_cast<uint32_t>(2048.0 - 2048.0 / gain);
}
double CamHelperImx283::gain(uint32_t gainCode) const
{
return static_cast<double>(2048.0 / (2048 - gainCode));
}
void CamHelperImx283::getDelays(int &exposureDelay, int &gainDelay,
int &vblankDelay, int &hblankDelay) const
{
/* The driver appears to behave as follows: */
exposureDelay = 2;
gainDelay = 2;
vblankDelay = 2;
hblankDelay = 2;
}
unsigned int CamHelperImx283::hideFramesModeSwitch() const
{
/* After a mode switch, we seem to get 1 bad frame. */
return 1;
}
static CamHelper *create()
{
return new CamHelperImx283();
}
static RegisterCamHelper reg("imx283", &create);
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