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Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 131 |
1 files changed, 131 insertions, 0 deletions
@@ -0,0 +1,131 @@ +/* + * UVC gadget test application + * + * Copyright (C) 2010 Ideas on board SPRL <laurent.pinchart@ideasonboard.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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + */ + +#include <signal.h> +#include <stdio.h> +#include <unistd.h> + +#include "configfs.h" +#include "events.h" +#include "stream.h" + +static void usage(const char *argv0) +{ + fprintf(stderr, "Usage: %s [options] <uvc device>\n", argv0); + fprintf(stderr, "Available options are\n"); + fprintf(stderr, " -c device V4L2 source device\n"); + fprintf(stderr, " -h Print this help screen and exit\n"); + fprintf(stderr, " -i image MJPEG image\n"); + fprintf(stderr, "\n"); + fprintf(stderr, " <uvc device> UVC device instance specifier\n"); + fprintf(stderr, "\n"); + + fprintf(stderr, " For ConfigFS devices the <uvc device> parameter can take the form of a shortened\n"); + fprintf(stderr, " function specifier such as: 'uvc.0', or if multiple gadgets are configured, the\n"); + fprintf(stderr, " gadget name should be included to prevent ambiguity: 'g1/functions/uvc.0'.\n"); + fprintf(stderr, "\n"); + fprintf(stderr, " For legacy g_webcam UVC instances, this parameter will identify the UDC that the\n"); + fprintf(stderr, " UVC function is bound to.\n"); + fprintf(stderr, "\n"); + fprintf(stderr, " The parameter is optional, and if not provided the first UVC function on the first\n"); + fprintf(stderr, " gadget identified will be used.\n"); + fprintf(stderr, "\n"); + fprintf(stderr, "Example usage:\n"); + fprintf(stderr, " uvc-gadget uvc.1\n"); + fprintf(stderr, " uvc-gadget g1/functions/uvc.1\n"); + fprintf(stderr, "\n"); + fprintf(stderr, " uvc-gadget musb-hdrc.0.auto\n"); +} + +/* Necessary for and only used by signal handler. */ +static struct events *sigint_events; + +static void sigint_handler(int signal __attribute__((__unused__))) +{ + /* Stop the main loop when the user presses CTRL-C */ + events_stop(sigint_events); +} + +int main(int argc, char *argv[]) +{ + char *function = NULL; + char *cap_device = "/dev/video1"; + struct uvc_function_config *fc; + struct uvc_stream *stream; + struct events events; + int ret = 0; + int opt; + + while ((opt = getopt(argc, argv, "c:h")) != -1) { + switch (opt) { + case 'c': + cap_device = optarg; + break; + + case 'h': + usage(argv[0]); + return 0; + + default: + fprintf(stderr, "Invalid option '-%c'\n", opt); + usage(argv[0]); + return 1; + } + } + + if (argv[optind] != NULL) + function = argv[optind]; + + fc = configfs_parse_uvc_function(function); + if (!fc) { + printf("Failed to identify function configuration\n"); + return 1; + } + + /* + * Create the events handler. Register a signal handler for SIGINT, + * received when the user presses CTRL-C. This will allow the main loop + * to be interrupted, and resources to be freed cleanly. + */ + events_init(&events); + + sigint_events = &events; + signal(SIGINT, sigint_handler); + + /* Create and initialise the stream. */ + stream = uvc_stream_new(fc->video, cap_device); + if (stream == NULL) { + ret = 1; + goto done; + } + + uvc_stream_init_uvc(stream, fc); + uvc_stream_set_event_handler(stream, &events); + + /* Main capture loop */ + events_loop(&events); + +done: + /* Cleanup */ + uvc_stream_delete(stream); + events_cleanup(&events); + configfs_free_uvc_function(fc); + + return ret; +} |