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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* main.cpp - cam - The libcamera swiss army knife
*/
#include <iostream>
#include <signal.h>
#include <string.h>
#include <libcamera/libcamera.h>
#include "capture.h"
#include "event_loop.h"
#include "main.h"
#include "options.h"
using namespace libcamera;
class CamApp
{
public:
CamApp();
static CamApp *instance();
int init(int argc, char **argv);
void cleanup();
int exec();
void quit();
private:
int parseOptions(int argc, char *argv[]);
int run();
static CamApp *app_;
OptionsParser::Options options_;
CameraManager *cm_;
std::shared_ptr<Camera> camera_;
EventLoop *loop_;
};
CamApp *CamApp::app_ = nullptr;
CamApp::CamApp()
: cm_(nullptr), camera_(nullptr), loop_(nullptr)
{
CamApp::app_ = this;
}
CamApp *CamApp::instance()
{
return CamApp::app_;
}
int CamApp::init(int argc, char **argv)
{
int ret;
ret = parseOptions(argc, argv);
if (ret < 0)
return ret;
cm_ = CameraManager::instance();
ret = cm_->start();
if (ret) {
std::cout << "Failed to start camera manager: "
<< strerror(-ret) << std::endl;
return ret;
}
if (options_.isSet(OptCamera)) {
camera_ = cm_->get(options_[OptCamera]);
if (!camera_) {
std::cout << "Camera "
<< std::string(options_[OptCamera])
<< " not found" << std::endl;
cm_->stop();
return -ENODEV;
}
if (camera_->acquire()) {
std::cout << "Failed to acquire camera" << std::endl;
camera_.reset();
cm_->stop();
return -EINVAL;
}
std::cout << "Using camera " << camera_->name() << std::endl;
}
loop_ = new EventLoop(cm_->eventDispatcher());
return 0;
}
void CamApp::cleanup()
{
delete loop_;
loop_ = nullptr;
if (camera_) {
camera_->release();
camera_.reset();
}
cm_->stop();
}
int CamApp::exec()
{
int ret;
ret = run();
cleanup();
return ret;
}
void CamApp::quit()
{
if (loop_)
loop_->exit();
}
int CamApp::parseOptions(int argc, char *argv[])
{
KeyValueParser streamKeyValue;
streamKeyValue.addOption("role", OptionString,
"Role for the stream (viewfinder, video, still)",
ArgumentRequired);
streamKeyValue.addOption("width", OptionInteger, "Width in pixels",
ArgumentRequired);
streamKeyValue.addOption("height", OptionInteger, "Height in pixels",
ArgumentRequired);
streamKeyValue.addOption("pixelformat", OptionInteger, "Pixel format",
ArgumentRequired);
OptionsParser parser;
parser.addOption(OptCamera, OptionString,
"Specify which camera to operate on", "camera",
ArgumentRequired, "camera");
parser.addOption(OptCapture, OptionNone,
"Capture until interrupted by user", "capture");
parser.addOption(OptFile, OptionString,
"Write captured frames to disk\n"
"The first '#' character in the file name is expanded to the stream name and frame sequence number.\n"
"The default file name is 'frame-#.bin'.",
"file", ArgumentOptional, "filename");
parser.addOption(OptStream, &streamKeyValue,
"Set configuration of a camera stream", "stream", true);
parser.addOption(OptHelp, OptionNone, "Display this help message",
"help");
parser.addOption(OptList, OptionNone, "List all cameras", "list");
options_ = parser.parse(argc, argv);
if (!options_.valid())
return -EINVAL;
if (options_.empty() || options_.isSet(OptHelp)) {
parser.usage();
return options_.empty() ? -EINVAL : -EINTR;
}
return 0;
}
int CamApp::run()
{
if (options_.isSet(OptList)) {
std::cout << "Available cameras:" << std::endl;
for (const std::shared_ptr<Camera> &cam : cm_->cameras())
std::cout << "- " << cam->name() << std::endl;
}
if (options_.isSet(OptCapture)) {
Capture capture(camera_.get());
return capture.run(loop_, options_);
}
return 0;
}
void signalHandler(int signal)
{
std::cout << "Exiting" << std::endl;
CamApp::instance()->quit();
}
int main(int argc, char **argv)
{
CamApp app;
int ret;
ret = app.init(argc, argv);
if (ret)
return ret == -EINTR ? 0 : EXIT_FAILURE;
struct sigaction sa = {};
sa.sa_handler = &signalHandler;
sigaction(SIGINT, &sa, nullptr);
if (app.exec())
return EXIT_FAILURE;
return 0;
}
|
