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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2009 Filippo Argiolas <filippo.argiolas@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details:
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <linux/videodev2.h>
#include "fd-util.h"
#include "util.h"
int main(int argc, char *argv[]) {
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{}
};
_cleanup_close_ int fd = -1;
char *device;
struct v4l2_capability v2cap;
int c;
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
switch (c) {
case 'h':
printf("%s [-h,--help] <device file>\n\n"
"Video4Linux device identification.\n\n"
" -h Print this message\n"
, program_invocation_short_name);
return 0;
case '?':
return -EINVAL;
default:
assert_not_reached("Unhandled option");
}
device = argv[optind];
if (device == NULL)
return 2;
fd = open(device, O_RDONLY);
if (fd < 0)
return 3;
if (ioctl(fd, VIDIOC_QUERYCAP, &v2cap) == 0) {
printf("ID_V4L_VERSION=2\n");
printf("ID_V4L_PRODUCT=%s\n", v2cap.card);
printf("ID_V4L_CAPABILITIES=:");
if ((v2cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) > 0 ||
(v2cap.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE) > 0)
printf("capture:");
if ((v2cap.capabilities & V4L2_CAP_VIDEO_OUTPUT) > 0 ||
(v2cap.capabilities & V4L2_CAP_VIDEO_OUTPUT_MPLANE) > 0)
printf("video_output:");
if ((v2cap.capabilities & V4L2_CAP_VIDEO_OVERLAY) > 0)
printf("video_overlay:");
if ((v2cap.capabilities & V4L2_CAP_AUDIO) > 0)
printf("audio:");
if ((v2cap.capabilities & V4L2_CAP_TUNER) > 0)
printf("tuner:");
if ((v2cap.capabilities & V4L2_CAP_RADIO) > 0)
printf("radio:");
printf("\n");
}
return 0;
}
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