1 /*
2 * Copyright (C) 2009 Kay Sievers <kay@vrfy.org>
3 * Copyright (c) 2009 Filippo Argiolas <filippo.argiolas@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of the
8 * License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details:
14 */
15
16 #ifndef _GNU_SOURCE
17 #define _GNU_SOURCE 1
18 #endif
19
20 #include <stdio.h>
21 #include <errno.h>
22 #include <string.h>
23 #include <ctype.h>
24 #include <stdlib.h>
25 #include <unistd.h>
26 #include <fcntl.h>
27 #include <getopt.h>
28 #include <sys/types.h>
29 #include <sys/time.h>
30 #include <sys/ioctl.h>
31 #include <linux/videodev2.h>
32
33 #include "util.h"
34
main(int argc,char * argv[])35 int main(int argc, char *argv[]) {
36 static const struct option options[] = {
37 { "help", no_argument, NULL, 'h' },
38 {}
39 };
40 _cleanup_close_ int fd = -1;
41 char *device;
42 struct v4l2_capability v2cap;
43 int c;
44
45 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
46
47 switch (c) {
48 case 'h':
49 printf("%s [-h,--help] <device file>\n\n"
50 "Video4Linux device identification.\n\n"
51 " -h Print this message\n"
52 , program_invocation_short_name);
53 return 0;
54 case '?':
55 return -EINVAL;
56
57 default:
58 assert_not_reached("Unhandled option");
59 }
60
61 device = argv[optind];
62 if (device == NULL)
63 return 2;
64
65 fd = open(device, O_RDONLY);
66 if (fd < 0)
67 return 3;
68
69 if (ioctl(fd, VIDIOC_QUERYCAP, &v2cap) == 0) {
70 printf("ID_V4L_VERSION=2\n");
71 printf("ID_V4L_PRODUCT=%s\n", v2cap.card);
72 printf("ID_V4L_CAPABILITIES=:");
73 if ((v2cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) > 0)
74 printf("capture:");
75 if ((v2cap.capabilities & V4L2_CAP_VIDEO_OUTPUT) > 0)
76 printf("video_output:");
77 if ((v2cap.capabilities & V4L2_CAP_VIDEO_OVERLAY) > 0)
78 printf("video_overlay:");
79 if ((v2cap.capabilities & V4L2_CAP_AUDIO) > 0)
80 printf("audio:");
81 if ((v2cap.capabilities & V4L2_CAP_TUNER) > 0)
82 printf("tuner:");
83 if ((v2cap.capabilities & V4L2_CAP_RADIO) > 0)
84 printf("radio:");
85 printf("\n");
86 }
87
88 return 0;
89 }
90