blob: 2e745f2a02cd5a87df4fcc8a6d08786b0b68cdec (
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
|
/* Copyright (c) 2012 Patrick Ruoff
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*/
#include "camera.h"
#include <string>
#include <QDebug>
using namespace cv;
#ifdef OPENTRACK_API
#else
// ----------------------------------------------------------------------------
void get_camera_device_names(std::vector<std::string>& device_names)
{
videoInput VI;
VI.listDevices();
std::string device_name;
for(int index = 0; ; ++index) {
device_name = VI.getDeviceName(index);
if (device_name.empty()) break;
device_names.push_back(device_name);
}
}
#endif
// ----------------------------------------------------------------------------
void Camera::set_device_index(int index)
{
if (desired_index != index)
{
desired_index = index;
_set_device_index();
// reset fps
dt_valid = 0;
dt_mean = 0;
active_index = index;
}
}
void Camera::set_fps(int fps)
{
if (cam_desired.fps != fps)
{
cam_desired.fps = fps;
_set_fps();
}
}
void Camera::set_res(int x_res, int y_res)
{
if (cam_desired.res_x != x_res || cam_desired.res_y != y_res)
{
cam_desired.res_x = x_res;
cam_desired.res_y = y_res;
_set_res();
}
}
CamInfo Camera::get_info()
{
if (cam_info.res_x == 0 || cam_info.res_y == 0)
{
cv::Mat tmp;
_get_frame(&tmp);
}
return cam_info;
}
bool Camera::get_frame(float dt, cv::Mat* frame)
{
bool new_frame = _get_frame(frame);
// measure fps of valid frames
const float dt_smoothing_const = 0.9;
dt_valid += dt;
if (new_frame)
{
dt_mean = dt_smoothing_const * dt_mean + (1.0 - dt_smoothing_const) * dt_valid;
cam_info.fps = dt_mean > 1e-3 ? 1.0 / dt_mean : 0;
dt_valid = 0;
}
return new_frame;
}
void CVCamera::start()
{
if (cap)
delete cap;
cap = new VideoCapture(desired_index);
_set_res();
_set_fps();
// extract camera info
if (cap->isOpened())
{
active = true;
active_index = desired_index;
cam_info.res_x = 0;
cam_info.res_y = 0;
} else {
delete cap;
cap = nullptr;
}
}
void CVCamera::stop()
{
if (cap)
{
cap->release();
delete cap;
cap = nullptr;
}
active = false;
}
bool CVCamera::_get_frame(Mat* frame)
{
if (cap && cap->isOpened())
{
Mat img;
for (int i = 0; i < 100 && !cap->read(img); i++)
;;
if (img.empty())
return false;
*frame = img;
cam_info.res_x = img.cols;
cam_info.res_y = img.rows;
return true;
}
return false;
}
void CVCamera::_set_fps()
{
if (cap) cap->set(CV_CAP_PROP_FPS, cam_desired.fps);
}
void CVCamera::_set_res()
{
if (cap)
{
cap->set(CV_CAP_PROP_FRAME_WIDTH, cam_desired.res_x);
cap->set(CV_CAP_PROP_FRAME_HEIGHT, cam_desired.res_y);
}
}
void CVCamera::_set_device_index()
{
if (cap)
{
cap->release();
delete cap;
}
cap = new VideoCapture(desired_index);
}
|
