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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2024 Ideas on Board Oy
*
agc_mean_luminance.h - Base class for mean luminance AGC algorithms
*/
#pragma once
#include <map>
#include <memory>
#include <tuple>
#include <vector>
#include <libcamera/controls.h>
#include "libcamera/internal/yaml_parser.h"
#include "exposure_mode_helper.h"
#include "histogram.h"
namespace libcamera {
namespace ipa {
class AgcMeanLuminance
{
public:
AgcMeanLuminance();
virtual ~AgcMeanLuminance();
struct AgcConstraint {
enum class Bound {
lower = 0,
upper = 1
};
Bound bound;
double qLo;
double qHi;
double yTarget;
};
int parseTuningData(const YamlObject &tuningData);
void setLimits(utils::Duration minShutter, utils::Duration maxShutter,
double minGain, double maxGain);
std::map<int32_t, std::vector<AgcConstraint>> constraintModes()
{
return constraintModes_;
}
std::map<int32_t, std::shared_ptr<ExposureModeHelper>> exposureModeHelpers()
{
return exposureModeHelpers_;
}
ControlInfoMap::Map controls()
{
return controls_;
}
std::tuple<utils::Duration, double, double>
calculateNewEv(uint32_t constraintModeIndex, uint32_t exposureModeIndex,
const Histogram &yHist, utils::Duration effectiveExposureValue);
void resetFrameCount()
{
frameCount_ = 0;
}
private:
virtual double estimateLuminance(const double gain) const = 0;
void parseRelativeLuminanceTarget(const YamlObject &tuningData);
void parseConstraint(const YamlObject &modeDict, int32_t id);
int parseConstraintModes(const YamlObject &tuningData);
int parseExposureModes(const YamlObject &tuningData);
double estimateInitialGain() const;
double constraintClampGain(uint32_t constraintModeIndex,
const Histogram &hist,
double gain);
utils::Duration filterExposure(utils::Duration exposureValue);
uint64_t frameCount_;
utils::Duration filteredExposure_;
double relativeLuminanceTarget_;
std::map<int32_t, std::vector<AgcConstraint>> constraintModes_;
std::map<int32_t, std::shared_ptr<ExposureModeHelper>> exposureModeHelpers_;
ControlInfoMap::Map controls_;
};
} /* namespace ipa */
} /* namespace libcamera */
|
