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
|
#include "ftnoir_protocol_libevdev.h"
#include "api/plugin-api.hpp"
#include "compat/math.hpp"
#include <cstdlib>
#include <cstring>
#include <cstdio>
#include <algorithm>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <QDebug>
#define CHECK_LIBEVDEV(expr) \
do { \
if ((int error = (expr)); error != 0) \
{ \
error_code = -error; \
error_str = #expr; \
goto fail; \
} \
} while (false)
static constexpr int max_input = 1 << 16;
static constexpr int mid_input = (1 << 15) - 1;
static constexpr int min_input = 0;
evdev::evdev()
{
dev = libevdev_new();
if (!dev)
{
error_code = errno;
error_str = "libevdev_new();";
goto fail;
}
CHECK_LIBEVDEV(libevdev_enable_property(dev, INPUT_PROP_BUTTONPAD));
libevdev_set_name(dev, "opentrack headpose");
struct input_absinfo absinfo;
absinfo.minimum = min_input;
absinfo.maximum = max_input;
absinfo.resolution = 1;
absinfo.value = mid_input;
absinfo.flat = 1;
absinfo.fuzz = 0;
CHECK_LIBEVDEV(libevdev_enable_event_type(dev, EV_ABS));
CHECK_LIBEVDEV(libevdev_enable_event_code(dev, EV_ABS, ABS_X, &absinfo));
CHECK_LIBEVDEV(libevdev_enable_event_code(dev, EV_ABS, ABS_Y, &absinfo));
CHECK_LIBEVDEV(libevdev_enable_event_code(dev, EV_ABS, ABS_Z, &absinfo));
CHECK_LIBEVDEV(libevdev_enable_event_code(dev, EV_ABS, ABS_RX, &absinfo));
CHECK_LIBEVDEV(libevdev_enable_event_code(dev, EV_ABS, ABS_RY, &absinfo));
CHECK_LIBEVDEV(libevdev_enable_event_code(dev, EV_ABS, ABS_RZ, &absinfo));
/* do not remove next 3 lines or udev scripts won't assign 0664 permissions -sh */
CHECK_LIBEVDEV(libevdev_enable_event_type(dev, EV_KEY));
CHECK_LIBEVDEV(libevdev_enable_event_code(dev, EV_KEY, BTN_JOYSTICK, NULL));
CHECK_LIBEVDEV(libevdev_enable_event_code(dev, EV_KEY, BTN_TRIGGER, NULL));
CHECK_LIBEVDEV(libevdev_uinput_create_from_device(dev, LIBEVDEV_UINPUT_OPEN_MANAGED, &uidev));
return;
fail:
if (uidev)
libevdev_uinput_destroy(uidev);
if (dev)
libevdev_free(dev);
qDebug() << "libevdev error" << error_code;
uidev = nullptr;
dev = nullptr;
}
evdev::~evdev()
{
if (uidev)
libevdev_uinput_destroy(uidev);
if (dev)
libevdev_free(dev);
}
void evdev::pose(const double* headpose) {
static const int axes[] = {
/* translation goes first */
ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ
};
static const int max_value[] = {
100,
100,
100,
180,
90,
180
};
for (int i = 0; i < 6; i++)
{
int value = headpose[i] * mid_input / max_value[i] + mid_input;
int normalized = clamp(value, min_input, max_input);
(void) libevdev_uinput_write_event(uidev, EV_ABS, axes[i], normalized);
}
(void) libevdev_uinput_write_event(uidev, EV_SYN, SYN_REPORT, 0);
}
module_status evdev::initialize()
{
if (error_code)
{
char buf[128] {};
(void)strerror_r(errno, buf, sizeof(buf));
return error(QStringLiteral("libevdev call '%1' failed with error '%2' (%3)")
.arg(error_str ? "<NULL>" : error_str, buf, error_code));
}
else
return {};
}
OPENTRACK_DECLARE_PROTOCOL(evdev, LibevdevControls, evdevDll)
|
