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Sourcecode: udev-extras version File versions

v4l_id.c

/*
 * Copyright (C) 2009 Kay Sievers <kay.sievers@vrfy.org>
 * 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 <stdio.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <linux/videodev.h>
#include <linux/videodev2.h>

int main (int argc, char *argv[])
{
      static const struct option options[] = {
            { "help", no_argument, NULL, 'h' },
            {}
      };
      int fd;
      char *device;
      struct video_capability v1cap;
      struct v4l2_capability v2cap;

      while (1) {
            int option;

            option = getopt_long(argc, argv, "h", options, NULL);
            if (option == -1)
                  break;

            switch (option) {
            case 'h':
                  printf("Usage: v4l_id [--help] <device file>\n\n");
            default:
                  return 1;
            }
      }
      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)
                  printf("capture:");
            if ((v2cap.capabilities & V4L2_CAP_VIDEO_OUTPUT) > 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");
      } else if (ioctl (fd, VIDIOCGCAP, &v1cap) == 0) {
            printf("ID_V4L_VERSION=1\n");
            printf("ID_V4L_PRODUCT=%s\n", v1cap.name);
            printf("ID_V4L_CAPABILITIES=:");
            if ((v1cap.type & VID_TYPE_CAPTURE) > 0)
                  printf("capture:");
            if ((v1cap.type & VID_TYPE_OVERLAY) > 0)
                  printf("video_overlay:");
            if (v1cap.audios > 0)
                  printf("audio:");
            if ((v1cap.type & VID_TYPE_TUNER) > 0)
                  printf("tuner:");
            printf("\n");
      }

      close (fd);
      return 0;
}

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