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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2024, Ideas On Board
*
* RkISP1 Color Correction Matrix control algorithm
*/
#include "ccm.h"
#include <algorithm>
#include <chrono>
#include <cmath>
#include <tuple>
#include <vector>
#include <libcamera/base/log.h>
#include <libcamera/base/utils.h>
#include <libcamera/control_ids.h>
#include <libcamera/ipa/core_ipa_interface.h>
#include "libcamera/internal/yaml_parser.h"
#include "../utils.h"
#include "libipa/matrix_interpolator.h"
/**
* \file ccm.h
*/
namespace libcamera {
namespace ipa::rkisp1::algorithms {
/**
* \class Ccm
* \brief A color correction matrix algorithm
*/
LOG_DEFINE_CATEGORY(RkISP1Ccm)
/**
* \copydoc libcamera::ipa::Algorithm::init
*/
int Ccm::init([[maybe_unused]] IPAContext &context, const YamlObject &tuningData)
{
int ret = ccm_.readYaml(tuningData["ccms"], "ct", "ccm");
if (ret < 0) {
LOG(RkISP1Ccm, Warning)
<< "Failed to parse 'ccm' "
<< "parameter from tuning file; falling back to unit matrix";
ccm_.reset();
}
ret = offsets_.readYaml(tuningData["ccms"], "ct", "offsets");
if (ret < 0) {
LOG(RkISP1Ccm, Warning)
<< "Failed to parse 'offsets' "
<< "parameter from tuning file; falling back to zero offsets";
/*
* MatrixInterpolator::reset() resets to identity matrices
* while here we need zero matrices so we need to construct it
* ourselves.
*/
Matrix<int16_t, 3, 1> m({ 0, 0, 0 });
std::map<unsigned int, Matrix<int16_t, 3, 1>> matrices = { { 0, m } };
offsets_ = MatrixInterpolator<int16_t, 3, 1>(matrices);
}
return 0;
}
void Ccm::setParameters(struct rkisp1_cif_isp_ctk_config &config,
const Matrix<float, 3, 3> &matrix,
const Matrix<int16_t, 3, 1> &offsets)
{
/*
* 4 bit integer and 7 bit fractional, ranging from -8 (0x400) to
* +7.992 (0x3ff)
*/
for (unsigned int i = 0; i < 3; i++) {
for (unsigned int j = 0; j < 3; j++)
config.coeff[i][j] =
utils::floatingToFixedPoint<4, 7, uint16_t, double>(matrix[i][j]);
}
for (unsigned int i = 0; i < 3; i++)
config.ct_offset[i] = offsets[i][0] & 0xfff;
LOG(RkISP1Ccm, Debug) << "Setting matrix " << matrix;
LOG(RkISP1Ccm, Debug) << "Setting offsets " << offsets;
}
/**
* \copydoc libcamera::ipa::Algorithm::prepare
*/
void Ccm::prepare(IPAContext &context, const uint32_t frame,
IPAFrameContext &frameContext, RkISP1Params *params)
{
uint32_t ct = context.activeState.awb.temperatureK;
/*
* \todo The colour temperature will likely be noisy, add filtering to
* avoid updating the CCM matrix all the time.
*/
if (frame > 0 && ct == ct_) {
frameContext.ccm.ccm = context.activeState.ccm.ccm;
return;
}
ct_ = ct;
Matrix<float, 3, 3> ccm = ccm_.get(ct);
Matrix<int16_t, 3, 1> offsets = offsets_.get(ct);
context.activeState.ccm.ccm = ccm;
frameContext.ccm.ccm = ccm;
auto config = params->block<BlockType::Ctk>();
config.setEnabled(true);
setParameters(*config, ccm, offsets);
}
/**
* \copydoc libcamera::ipa::Algorithm::process
*/
void Ccm::process([[maybe_unused]] IPAContext &context,
[[maybe_unused]] const uint32_t frame,
IPAFrameContext &frameContext,
[[maybe_unused]] const rkisp1_stat_buffer *stats,
ControlList &metadata)
{
float m[9];
for (unsigned int i = 0; i < 3; i++) {
for (unsigned int j = 0; j < 3; j++)
m[i * 3 + j] = frameContext.ccm.ccm[i][j];
}
metadata.set(controls::ColourCorrectionMatrix, m);
}
REGISTER_IPA_ALGORITHM(Ccm, "Ccm")
} /* namespace ipa::rkisp1::algorithms */
} /* namespace libcamera */
|
