blob: e5901da1d3f03e83705f905c6511f7f7ad08c571 (
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
|
/* 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 "opentrack-compat/sleep.hpp"
#include "opentrack-compat/camera-names.hpp"
#include <string>
#include <QDebug>
void Camera::set_device(const QString& name)
{
const int index = camera_name_to_index(name);
desired_name = name;
if (desired_index != index)
{
desired_index = index;
_set_device_index();
// reset fps
dt_valid = 0;
dt_mean = 0;
active_index = index;
}
}
QString Camera::get_desired_name() const
{
return desired_name;
}
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();
}
}
bool Camera::get_info(CamInfo& ret)
{
if (cam_info.res_x == 0 || cam_info.res_y == 0)
{
return false;
}
ret = cam_info;
return true;
}
bool Camera::get_frame(float dt, cv::Mat* frame)
{
bool new_frame = _get_frame(frame);
// measure fps of valid frames
constexpr float dt_smoothing_const = 0.95f;
dt_valid += dt;
if (new_frame)
{
dt_mean = dt_smoothing_const * dt_mean + (1 - dt_smoothing_const) * dt_valid;
cam_info.fps = int(std::round(dt_mean > 1e-3f ? 1 / dt_mean : 0));
dt_valid = 0;
}
else
qDebug() << "pt camera: can't get frame";
return new_frame;
}
void CVCamera::start()
{
stop();
cap = new cv::VideoCapture(desired_index);
_set_res();
_set_fps();
// extract camera info
if (cap->isOpened())
{
active_index = desired_index;
cam_info.res_x = 0;
cam_info.res_y = 0;
} else {
stop();
}
}
void CVCamera::stop()
{
if (cap)
{
const bool opened = cap->isOpened();
if (opened)
{
qDebug() << "pt: freeing camera";
cap->release();
}
delete cap;
cap = nullptr;
// give opencv time to exit camera threads, etc.
if (opened)
portable::sleep(500);
qDebug() << "pt camera: stopped";
}
}
bool CVCamera::_get_frame(cv::Mat* frame)
{
if (cap && cap->isOpened())
{
for (int i = 0; i < 100 && !cap->read(*frame); i++)
;;
if (frame->empty())
return false;
cam_info.res_x = frame->cols;
cam_info.res_y = frame->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 (desired_index != active_index)
stop();
}
|
