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
|
/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2020, Raspberry Pi (Trading) Ltd.
*
* staggered_ctrl.cpp - Helper for writing staggered ctrls to a V4L2 device.
*/
#include "staggered_ctrl.h"
#include <algorithm>
#include <libcamera/controls.h>
#include "log.h"
#include "utils.h"
#include "v4l2_videodevice.h"
namespace libcamera {
LOG_DEFINE_CATEGORY(RPI_S_W);
namespace RPi {
void StaggeredCtrl::init(V4L2VideoDevice *dev,
std::initializer_list<std::pair<const uint32_t, uint8_t>> delayList)
{
std::lock_guard<std::mutex> lock(lock_);
dev_ = dev;
delay_ = delayList;
ctrl_.clear();
/* Find the largest delay across all controls. */
maxDelay_ = 0;
for (auto const &p : delay_) {
LOG(RPI_S_W, Info) << "Init ctrl "
<< utils::hex(p.first) << " with delay "
<< static_cast<int>(p.second);
maxDelay_ = std::max(maxDelay_, p.second);
}
init_ = true;
}
void StaggeredCtrl::reset()
{
std::lock_guard<std::mutex> lock(lock_);
int lastSetCount = std::max<int>(0, setCount_ - 1);
std::unordered_map<uint32_t, int32_t> lastVal;
/* Reset the counters. */
setCount_ = getCount_ = 0;
/* Look for the last set values. */
for (auto const &c : ctrl_)
lastVal[c.first] = c.second[lastSetCount].value;
/* Apply the last set values as the next to be applied. */
ctrl_.clear();
for (auto &c : lastVal)
ctrl_[c.first][setCount_] = CtrlInfo(c.second);
}
bool StaggeredCtrl::set(uint32_t ctrl, int32_t value)
{
std::lock_guard<std::mutex> lock(lock_);
/* Can we find this ctrl as one that is registered? */
if (delay_.find(ctrl) == delay_.end())
return false;
ctrl_[ctrl][setCount_].value = value;
ctrl_[ctrl][setCount_].updated = true;
return true;
}
bool StaggeredCtrl::set(std::initializer_list<std::pair<const uint32_t, int32_t>> ctrlList)
{
std::lock_guard<std::mutex> lock(lock_);
for (auto const &p : ctrlList) {
/* Can we find this ctrl? */
if (delay_.find(p.first) == delay_.end())
return false;
ctrl_[p.first][setCount_] = CtrlInfo(p.second);
}
return true;
}
bool StaggeredCtrl::set(ControlList &controls)
{
std::lock_guard<std::mutex> lock(lock_);
for (auto const &p : controls) {
/* Can we find this ctrl? */
if (delay_.find(p.first) == delay_.end())
return false;
ctrl_[p.first][setCount_] = CtrlInfo(p.second.get<int32_t>());
LOG(RPI_S_W, Debug) << "Setting ctrl "
<< utils::hex(p.first) << " to "
<< ctrl_[p.first][setCount_].value
<< " at index "
<< setCount_;
}
return true;
}
int StaggeredCtrl::write()
{
std::lock_guard<std::mutex> lock(lock_);
ControlList controls(dev_->controls());
for (auto &p : ctrl_) {
int delayDiff = maxDelay_ - delay_[p.first];
int index = std::max<int>(0, setCount_ - delayDiff);
if (p.second[index].updated) {
/* We need to write this value out. */
controls.set(p.first, p.second[index].value);
p.second[index].updated = false;
LOG(RPI_S_W, Debug) << "Writing ctrl "
<< utils::hex(p.first) << " to "
<< p.second[index].value
<< " at index "
<< index;
}
}
nextFrame();
return dev_->setControls(&controls);
}
void StaggeredCtrl::get(std::unordered_map<uint32_t, int32_t> &ctrl, uint8_t offset)
{
std::lock_guard<std::mutex> lock(lock_);
/* Account for the offset to reset the getCounter. */
getCount_ += offset + 1;
ctrl.clear();
for (auto &p : ctrl_) {
int index = std::max<int>(0, getCount_ - maxDelay_);
ctrl[p.first] = p.second[index].value;
LOG(RPI_S_W, Debug) << "Getting ctrl "
<< utils::hex(p.first) << " to "
<< p.second[index].value
<< " at index "
<< index;
}
}
void StaggeredCtrl::nextFrame()
{
/* Advance the control history to the next frame */
int prevCount = setCount_;
setCount_++;
LOG(RPI_S_W, Debug) << "Next frame, set index is " << setCount_;
for (auto &p : ctrl_) {
p.second[setCount_].value = p.second[prevCount].value;
p.second[setCount_].updated = false;
}
}
} /* namespace RPi */
} /* namespace libcamera */
|
