1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2021, Raspberry Pi Ltd
*
* camera helper for imx290 sensor
*/
#include <cmath>
#include "cam_helper.h"
using namespace RPiController;
class CamHelperImx290 : public CamHelper
{
public:
CamHelperImx290();
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 hideFramesStartup() 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 = 2;
};
CamHelperImx290::CamHelperImx290()
: CamHelper({}, frameIntegrationDiff)
{
}
uint32_t CamHelperImx290::gainCode(double gain) const
{
int code = 66.6667 * std::log10(gain);
return std::max(0, std::min(code, 0xf0));
}
double CamHelperImx290::gain(uint32_t gainCode) const
{
return std::pow(10, 0.015 * gainCode);
}
void CamHelperImx290::getDelays(int &exposureDelay, int &gainDelay,
int &vblankDelay, int &hblankDelay) const
{
exposureDelay = 2;
gainDelay = 2;
vblankDelay = 2;
hblankDelay = 2;
}
unsigned int CamHelperImx290::hideFramesStartup() const
{
/* On startup, we seem to get 1 bad frame. */
return 1;
}
unsigned int CamHelperImx290::hideFramesModeSwitch() const
{
/* After a mode switch, we seem to get 1 bad frame. */
return 1;
}
static CamHelper *create()
{
return new CamHelperImx290();
}
static RegisterCamHelper reg("imx290", &create);
static RegisterCamHelper reg327("imx327", &create);
static RegisterCamHelper reg462("imx462", &create);
|
