diff options
Diffstat (limited to 'options.c')
| -rw-r--r-- | options.c | 28 |
1 files changed, 24 insertions, 4 deletions
@@ -30,19 +30,39 @@ struct media_options media_opts = { .devname = MEDIA_DEVNAME_DEFAULT, }; -static void usage(const char *argv0) +static void usage(const char *argv0, int verbose) { printf("%s [options] device\n", argv0); printf("-d, --device dev Media device name (default: %s)\n", MEDIA_DEVNAME_DEFAULT); printf("-e, --entity name Print the device name associated with the given entity\n"); printf("-f, --formats Comma-separated list of formats to setup\n"); - printf("-h, --help Show this help screen\n"); + printf("-h, --help Show verbose help and exit\n"); printf("-i, --interactive Modify links interactively\n"); printf("-l, --links Comma-separated list of links descriptors to setup\n"); printf("-p, --print-topology Print the device topology (implies -v)\n"); printf(" --print-dot Print the device topology as a dot graph (implies -v)\n"); printf("-r, --reset Reset all links to inactive\n"); printf("-v, --verbose Be verbose\n"); + + if (!verbose) + return; + + printf("\n"); + printf("Links and formats are defined as\n"); + printf("\tlink = pad, '->', pad, '[', flags, ']' ;\n"); + printf("\tformat = pad, '[', fcc, ' ', size, [ ' ', crop ], ']' ;\n"); + printf("\tpad = entity, ':', pad number ;\n"); + printf("\tentity = entity number | ( '\"', entity name, '\"' ) ;\n"); + printf("\tsize = width, 'x', height ;\n"); + printf("\tcrop = left, ',', top, '/', size ;\n"); + printf("where the fields are\n"); + printf("\tentity number Entity numeric identifier\n"); + printf("\tentity name Entify name (string) \n"); + printf("\tpad number Pad numeric identifier\n"); + printf("\tflags Link flags (0: inactive, 1: active)\n"); + printf("\tfcc Format FourCC\n"); + printf("\twidth Image width in pixels\n"); + printf("\theight Image height in pixels\n"); } #define OPT_PRINT_DOT 256 @@ -65,7 +85,7 @@ int parse_cmdline(int argc, char **argv) int opt; if (argc == 1) { - usage(argv[0]); + usage(argv[0], 0); return 1; } @@ -85,7 +105,7 @@ int parse_cmdline(int argc, char **argv) break; case 'h': - usage(argv[0]); + usage(argv[0], 1); exit(0); case 'i': |