2 * Copyright (C) 2009 Kay Sievers <kay@vrfy.org>
3 * Copyright (c) 2009 Filippo Argiolas <filippo.argiolas@gmail.com>
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.
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:
24 #include <sys/types.h>
26 #include <sys/ioctl.h>
27 #include <linux/videodev2.h>
31 int main(int argc, char *argv[]) {
32 static const struct option options[] = {
33 { "help", no_argument, NULL, 'h' },
36 _cleanup_close_ int fd = -1;
38 struct v4l2_capability v2cap;
41 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
45 printf("%s [-h,--help] <device file>\n\n"
46 "Video4Linux device identification.\n\n"
47 " -h Print this message\n"
48 , program_invocation_short_name);
54 assert_not_reached("Unhandled option");
57 device = argv[optind];
61 fd = open(device, O_RDONLY);
65 if (ioctl(fd, VIDIOC_QUERYCAP, &v2cap) == 0) {
66 printf("ID_V4L_VERSION=2\n");
67 printf("ID_V4L_PRODUCT=%s\n", v2cap.card);
68 printf("ID_V4L_CAPABILITIES=:");
69 if ((v2cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) > 0)
71 if ((v2cap.capabilities & V4L2_CAP_VIDEO_OUTPUT) > 0)
72 printf("video_output:");
73 if ((v2cap.capabilities & V4L2_CAP_VIDEO_OVERLAY) > 0)
74 printf("video_overlay:");
75 if ((v2cap.capabilities & V4L2_CAP_AUDIO) > 0)
77 if ((v2cap.capabilities & V4L2_CAP_TUNER) > 0)
79 if ((v2cap.capabilities & V4L2_CAP_RADIO) > 0)