forked from DT42/BerryNet
-
Notifications
You must be signed in to change notification settings - Fork 0
/
camera.js
169 lines (161 loc) · 5.39 KB
/
camera.js
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
// Copyright 2017 DT42
//
// This file is part of BerryNet.
//
// BerryNet is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// BerryNet is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with BerryNet. If not, see <http://www.gnu.org/licenses/>.
'use strict';
const fs = require('fs');
const mqtt = require('mqtt');
const request = require('request');
const spawnsync = require('child_process').spawnSync;
const config = require('./config');
const cv = require('opencv');
const broker = config.brokerHost;
const client = mqtt.connect(broker);
const topicActionLog = config.topicActionLog;
const topicActionInference = config.topicActionInference;
const topicEventCamera = config.topicEventCamera;
const cameraURI = config.ipcameraSnapshot;
const snapshotFile = '/tmp/snapshot.jpg';
const snapshotWidth = config.boardcameraImageWidth;
const snapshotHeight = config.boardcameraImageHeight;
const cameraCmd = '/usr/bin/raspistill';
const cameraArgs = ['-vf', '-hf',
'-w', snapshotWidth,
'-h', snapshotHeight,
'-o', snapshotFile];
const usbCameraCmd = '/usr/bin/fswebcam';
const usbCameraArgs = ['-r', snapshotWidth + 'x' + snapshotHeight,
'--no-banner', '-D', '0.5', snapshotFile];
const fps = 30;
var cameraIntervalID = null;
var cameraInterval = 1000.0 / fps;
var cameraCV = null;
var frameCounter = 0;
function log(m) {
client.publish(topicActionLog, m);
console.log(m);
}
client.on('connect', () => {
client.subscribe(topicEventCamera);
log(`camera client: connected to ${broker} successfully.`);
});
client.on('message', (t, m) => {
log(`camera client: on topic ${t}, received message ${m}.`);
const action = m.toString();
if (action == 'snapshot_picam') {
/* NOTE: We use V4L2 to support RPi camera, so RPi camera's usage is
* the same as USB camera. Both RPi and USB cameras are called
* "board camera".
*
* This action is obsoleted and will be removed in the future.
*/
// Take a snapshot from RPi3 camera. The snapshot will be displayed
// on dashboard.
spawnsync(cameraCmd, cameraArgs);
fs.readFile(snapshotFile, function(err, data) {
if (err) {
log('camera client: cannot get image.');
} else {
log('camera client: publishing image.');
client.publish(topicActionInference, data);
}
});
} else if (action == 'snapshot_ipcam') {
// Take a snapshot from IP camera. The snapshot will be sent to
// configured email address.
request.get(
{uri: cameraURI, encoding: null},
(e, res, body) => {
if (!e && res.statusCode == 200) {
log('camera client: publishing image.');
client.publish(topicActionInference, body);
} else {
log('camera client: cannot get image.');
}
}
);
} else if (action == 'snapshot_boardcam') {
// Take a snapshot from USB camera.
spawnsync(usbCameraCmd, usbCameraArgs);
fs.readFile(snapshotFile, function(err, data) {
if (err) {
log('camera client: cannot get image.');
} else {
log('camera client: publishing image.');
client.publish(topicActionInference, data);
}
});
} else if (action == 'stream_boardcam_start') {
if ((!cameraCV) && (!cameraIntervalID)) {
cameraCV = new cv.VideoCapture(0);
cameraCV.setWidth(snapshotWidth);
cameraCV.setHeight(snapshotHeight);
cameraIntervalID = setInterval(function() {
cameraCV.read(function(err, im) {
if (err) {
throw err;
}
if (frameCounter < fps * 2) {
frameCounter++;
} else {
frameCounter = 0;
im.save(snapshotFile);
fs.readFile(snapshotFile, function(err, data) {
if (err) {
log('camera client: cannot get image.');
} else {
log('camera client: publishing image.');
client.publish(topicActionInference, data);
}
});
}
im.release();
});
}, cameraInterval);
}
} else if (action == 'stream_boardcam_stop') {
if (cameraCV) {
cameraCV.release();
cameraCV = null;
}
if (cameraIntervalID) {
clearInterval(cameraIntervalID);
cameraIntervalID = null;
}
} else if (action == 'stream_nest_ipcam_start') {
if (!cameraIntervalID) {
cameraIntervalID = setInterval(function() {
request.get(
{uri: cameraURI, encoding: null},
(e, res, body) => {
if (!e && res.statusCode == 200) {
log('camera client: publishing image.');
client.publish(topicActionInference, body);
} else {
log('camera client: cannot get image.');
}
}
);
}, cameraInterval);
}
} else if (action == 'stream_nest_ipcam_stop') {
if (cameraIntervalID) {
clearInterval(cameraIntervalID);
cameraIntervalID = null;
}
} else {
log('camera client: unkown action.');
}
});