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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2021, Raspberry Pi Ltd
* Copyright (C) 2023, Ideas on Board Oy.
*
* camera information for ov64a40 sensor
*/
#include <assert.h>
#include "cam_helper.h"
using namespace RPiController;
class CamHelperOv64a40 : public CamHelper
{
public:
CamHelperOv64a40();
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;
double getModeSensitivity(const CameraMode &mode) const override;
private:
/*
* Smallest difference between the frame length and integration time,
* in units of lines.
*/
static constexpr int frameIntegrationDiff = 32;
};
CamHelperOv64a40::CamHelperOv64a40()
: CamHelper({}, frameIntegrationDiff)
{
}
uint32_t CamHelperOv64a40::gainCode(double gain) const
{
return static_cast<uint32_t>(gain * 128.0);
}
double CamHelperOv64a40::gain(uint32_t gainCode) const
{
return static_cast<double>(gainCode) / 128.0;
}
void CamHelperOv64a40::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;
}
double CamHelperOv64a40::getModeSensitivity(const CameraMode &mode) const
{
if (mode.binX >= 2 && mode.scaleX >= 4) {
return 4.0;
} else if (mode.binX >= 2 && mode.scaleX >= 2) {
return 2.0;
} else {
return 1.0;
}
}
static CamHelper *create()
{
return new CamHelperOv64a40();
}
static RegisterCamHelper reg("ov64a40", &create);
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