blob: aabb245428a4bfafbcffbe14f50660cc3006f9c9 (
plain) (
blame)
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
|
#include "videodevice.h"
#include <QFile>
#ifdef Q_OS_LINUX
#include <linux/videodev2.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#endif
VideoDevice::VideoDevice()
{
}
VideoDevice::~VideoDevice()
{
}
void VideoDevice::Capture()
{
}
void VideoDevice::Play()
{
}
void VideoDevice::Close()
{
}
QList<MediaDeviceInfo> VideoDevice::Enumerate(enum MediaDeviceStreamDirection dir)
{
QList<MediaDeviceInfo> result;
int index = 0;
if (dir == PLAYBACK)
return result;
#ifdef Q_OS_LINUX
for (int i = 0; i < 64; i++)
{
QString device = QString(QLatin1String("/dev/video%1")).arg(i);
if (QFile::exists(device))
{
MediaDeviceInfo d;
d.device = device;
QFile v4l2_name(QString(QLatin1String("/sys/class/video4linux/video%1/name")).arg(i));
if (v4l2_name.open((QIODevice::ReadOnly | QIODevice::Text)))
{
d.humanReadable = QString(v4l2_name.readLine()).trimmed();
v4l2_name.close();
}
/* Skip metadata device nodes introduced in latest kernels
* See:
* https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=088ead25524583e2200aa99111bea2f66a86545a
* https://bugzilla.kernel.org/show_bug.cgi?id=199575
* Add only devices having V4L2_CAP_VIDEO_CAPTURE capability.
*/
int fd = ::open(d.device.toLatin1().constData(), O_RDWR | O_NONBLOCK);
if (fd < 0)
continue;
struct v4l2_capability cap;
memset(&cap, 0, sizeof cap);
int ret = ::ioctl(fd, VIDIOC_QUERYCAP, &cap);
::close(fd);
if (ret == -1)
continue;
if (!(cap.device_caps & V4L2_CAP_VIDEO_CAPTURE))
continue;
d.index = index++;
result << d;
}
}
#endif
return result;
}
|
