blob: 959f314f54525b260804a3941bc1eab0214d3287 (
plain)
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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2021, Google Inc.
*
* ipa_context.cpp - IPU3 IPA Context
*/
#include "ipa_context.h"
/**
* \file ipa_context.h
* \brief Context and state information shared between the algorithms
*/
namespace libcamera::ipa::ipu3 {
/**
* \struct IPASessionConfiguration
* \brief Session configuration for the IPA module
*
* The session configuration contains all IPA configuration parameters that
* remain constant during the capture session, from IPA module start to stop.
* It is typically set during the configure() operation of the IPA module, but
* may also be updated in the start() operation.
*/
/**
* \struct IPAActiveState
* \brief The active state of the IPA algorithms
*
* The IPA is fed with the statistics generated from the latest frame captured
* by the hardware. The statistics are then processed by the IPA algorithms to
* compute ISP parameters required for the next frame capture. The current state
* of the algorithms is reflected through the IPAActiveState to store the values
* most recently computed by the IPA algorithms.
*/
/**
* \struct IPAContext
* \brief Global IPA context data shared between all algorithms
*
* \var IPAContext::configuration
* \brief The IPA session configuration, immutable during the session
*
* \var IPAContext::frameContexts
* \brief Ring buffer of the IPAFrameContext(s)
*
* \var IPAContext::activeState
* \brief The current state of IPA algorithms
*/
/**
* \var IPASessionConfiguration::grid
* \brief Grid configuration of the IPA
*
* \var IPASessionConfiguration::grid.bdsGrid
* \brief Bayer Down Scaler grid plane config used by the kernel
*
* \var IPASessionConfiguration::grid.bdsOutputSize
* \brief BDS output size configured by the pipeline handler
*
* \var IPASessionConfiguration::grid.stride
* \brief Number of cells on one line including the ImgU padding
*/
/**
* \var IPASessionConfiguration::af
* \brief AF grid configuration of the IPA
*
* \var IPASessionConfiguration::af.afGrid
* \brief AF scene grid configuration
*/
/**
* \var IPAActiveState::af
* \brief Context for the Automatic Focus algorithm
*
* \var IPAActiveState::af.focus
* \brief Current position of the lens
*
* \var IPAActiveState::af.maxVariance
* \brief The maximum variance of the current image
*
* \var IPAActiveState::af.stable
* \brief It is set to true, if the best focus is found
*/
/**
* \var IPASessionConfiguration::agc
* \brief AGC parameters configuration of the IPA
*
* \var IPASessionConfiguration::agc.minShutterSpeed
* \brief Minimum shutter speed supported with the configured sensor
*
* \var IPASessionConfiguration::agc.maxShutterSpeed
* \brief Maximum shutter speed supported with the configured sensor
*
* \var IPASessionConfiguration::agc.minAnalogueGain
* \brief Minimum analogue gain supported with the configured sensor
*
* \var IPASessionConfiguration::agc.maxAnalogueGain
* \brief Maximum analogue gain supported with the configured sensor
*/
/**
* \var IPASessionConfiguration::sensor
* \brief Sensor-specific configuration of the IPA
*
* \var IPASessionConfiguration::sensor.lineDuration
* \brief Line duration in microseconds
*
* \var IPASessionConfiguration::sensor.defVBlank
* \brief The default vblank value of the sensor
*
* \var IPASessionConfiguration::sensor.size
* \brief Sensor output resolution
*/
/**
* \var IPAActiveState::agc
* \brief Context for the Automatic Gain Control algorithm
*
* The exposure and gain determined are expected to be applied to the sensor
* at the earliest opportunity.
*
* \var IPAActiveState::agc.exposure
* \brief Exposure time expressed as a number of lines
*
* \var IPAActiveState::agc.gain
* \brief Analogue gain multiplier
*
* The gain should be adapted to the sensor specific gain code before applying.
*/
/**
* \var IPAActiveState::awb
* \brief Context for the Automatic White Balance algorithm
*
* \var IPAActiveState::awb.gains
* \brief White balance gains
*
* \var IPAActiveState::awb.gains.red
* \brief White balance gain for R channel
*
* \var IPAActiveState::awb.gains.green
* \brief White balance gain for G channel
*
* \var IPAActiveState::awb.gains.blue
* \brief White balance gain for B channel
*
* \var IPAActiveState::awb.temperatureK
* \brief Estimated color temperature
*/
/**
* \var IPAActiveState::toneMapping
* \brief Context for ToneMapping and Gamma control
*
* \var IPAActiveState::toneMapping.gamma
* \brief Gamma value for the LUT
*
* \var IPAActiveState::toneMapping.gammaCorrection
* \brief Per-pixel tone mapping implemented as a LUT
*
* The LUT structure is defined by the IPU3 kernel interface. See
* <linux/intel-ipu3.h> struct ipu3_uapi_gamma_corr_lut for further details.
*/
/**
* \struct IPAFrameContext
* \brief IPU3-specific FrameContext
*
* \var IPAFrameContext::sensor
* \brief Effective sensor values that were applied for the frame
*
* \var IPAFrameContext::sensor.exposure
* \brief Exposure time expressed as a number of lines
*
* \var IPAFrameContext::sensor.gain
* \brief Analogue gain multiplier
*/
} /* namespace libcamera::ipa::ipu3 */
|
