Move everything into a separate futatabi/ subdir, for the upcoming merge with Nageru.

[nageru] / futatabi / flags.cpp

diff --git a/futatabi/flags.cpp b/futatabi/flags.cpp
new file mode 100644 (file)
index 0000000..4c75370
--- /dev/null
+++ b/futatabi/flags.cpp
@@ -0,0 +1,82 @@
+#include "flags.h"
+
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <utility>
+
+using namespace std;
+
+Flags global_flags;
+
+// Long options that have no corresponding short option.
+enum LongOption {
+       OPTION_HELP = 1000,
+       OPTION_SLOW_DOWN_INPUT = 1001,
+       OPTION_HTTP_PORT = 1002
+};
+
+void usage()
+{
+       fprintf(stderr, "Usage: futatabi [OPTION]... SOURCE_URL\n");
+       fprintf(stderr, "\n");
+       fprintf(stderr, "      --help                      print usage information\n");
+       fprintf(stderr, "      --slow-down-input           slow down input to realtime (default on if no\n");
+       fprintf(stderr, "                                    source URL given)\n");
+       fprintf(stderr, "  -q, --interpolation-quality N   1 = fastest\n");
+       fprintf(stderr, "                                  2 = default (realtime 720p on fast embedded GPUs)\n");
+       fprintf(stderr, "                                  3 = good (realtime 720p on GTX 970 or so)\n");
+       fprintf(stderr, "                                  4 = best (not realtime on any current GPU)\n");
+       fprintf(stderr, "  -d, --working-directory DIR     where to store frames and database\n");
+       fprintf(stderr, "      --http-port PORT            which port to listen on for output\n");
+}
+
+void parse_flags(int argc, char * const argv[])
+{
+       static const option long_options[] = {
+               { "help", no_argument, 0, OPTION_HELP },
+               { "slow-down-input", no_argument, 0, OPTION_SLOW_DOWN_INPUT },
+               { "interpolation-quality", required_argument, 0, 'q' },
+               { "working-directory", required_argument, 0, 'd' },
+               { "http-port", required_argument, 0, OPTION_HTTP_PORT },
+               { 0, 0, 0, 0 }
+       };
+       for ( ;; ) {
+               int option_index = 0;
+               int c = getopt_long(argc, argv, "q:d:", long_options, &option_index);
+
+               if (c == -1) {
+                       break;
+               }
+               switch (c) {
+               case OPTION_SLOW_DOWN_INPUT:
+                       global_flags.slow_down_input = true;
+                       break;
+               case 'q':
+                       global_flags.interpolation_quality = atoi(optarg);
+                       break;
+               case 'd':
+                       global_flags.working_directory = optarg;
+                       break;
+               case OPTION_HTTP_PORT:
+                       global_flags.http_port = atoi(optarg);
+                       break;
+               case OPTION_HELP:
+                       usage();
+                       exit(0);
+               default:
+                       fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
+                       fprintf(stderr, "\n");
+                       usage();
+                       exit(1);
+               }
+       }
+
+       if (global_flags.interpolation_quality < 1 || global_flags.interpolation_quality > 4) {
+               fprintf(stderr, "Interpolation quality must be 1, 2, 3 or 4.\n");
+               usage();
+               exit(1);
+       }
+}