/* * Copyright (C) 2009 Kay Sievers <kay@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 <unistd.h> #include <fcntl.h> #include <getopt.h> #include <sys/types.h> #include <sys/time.h> #include <sys/ioctl.h> #include <linux/videodev2.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) 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"); } return 0; }