diff options
Diffstat (limited to '')
-rw-r--r-- | src/udev/v4l_id/v4l_id.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/udev/v4l_id/v4l_id.c b/src/udev/v4l_id/v4l_id.c new file mode 100644 index 0000000..c2312c7 --- /dev/null +++ b/src/udev/v4l_id/v4l_id.c @@ -0,0 +1,93 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * 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(); + } + + device = argv[optind]; + if (!device) + return 2; + + fd = open(device, O_RDONLY); + if (fd < 0) + return 3; + + if (ioctl(fd, VIDIOC_QUERYCAP, &v2cap) == 0) { + int capabilities; + printf("ID_V4L_VERSION=2\n"); + printf("ID_V4L_PRODUCT=%s\n", v2cap.card); + printf("ID_V4L_CAPABILITIES=:"); + if (v2cap.capabilities & V4L2_CAP_DEVICE_CAPS) + capabilities = v2cap.device_caps; + else + capabilities = v2cap.capabilities; + if ((capabilities & V4L2_CAP_VIDEO_CAPTURE) > 0 || + (capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE) > 0) + printf("capture:"); + if ((capabilities & V4L2_CAP_VIDEO_OUTPUT) > 0 || + (capabilities & V4L2_CAP_VIDEO_OUTPUT_MPLANE) > 0) + printf("video_output:"); + if ((capabilities & V4L2_CAP_VIDEO_OVERLAY) > 0) + printf("video_overlay:"); + if ((capabilities & V4L2_CAP_AUDIO) > 0) + printf("audio:"); + if ((capabilities & V4L2_CAP_TUNER) > 0) + printf("tuner:"); + if ((capabilities & V4L2_CAP_RADIO) > 0) + printf("radio:"); + printf("\n"); + } + + return 0; +} |