git.sesse.net Git - nageru/blob - futatabi/flags.cpp

   1 #include "flags.h"
   2
   3 #include <getopt.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7
   8 #include <utility>
   9
  10 using namespace std;
  11
  12 Flags global_flags;
  13 int flow_initialized_interpolation_quality;
  14
  15 // Long options that have no corresponding short option.
  16 enum LongOption {
  17         OPTION_HELP = 1000,
  18         OPTION_SLOW_DOWN_INPUT = 1001,
  19         OPTION_HTTP_PORT = 1002,
  20         OPTION_TALLY_URL = 1003
  21 };
  22
  23 void usage()
  24 {
  25         fprintf(stderr, "Usage: futatabi [OPTION]... SOURCE_URL\n");
  26         fprintf(stderr, "\n");
  27         fprintf(stderr, "      --help                      print usage information\n");
  28         fprintf(stderr, "  -w, --width                     output width in pixels (default 1280)\n");
  29         fprintf(stderr, "  -h, --height                    output height in pixels (default 720)\n");
  30         fprintf(stderr, "  -r, --frame-rate NUM[/NUM]      output frame rate, as a float or fraction\n");
  31         fprintf(stderr, "                                    (default 60000/1001 ~= 59.94)\n");
  32         fprintf(stderr, "      --slow-down-input           slow down input to realtime (default on if no\n");
  33         fprintf(stderr, "                                    source URL given)\n");
  34         fprintf(stderr, "  -q, --interpolation-quality N   0 = off\n");
  35         fprintf(stderr, "                                  1 = fastest\n");
  36         fprintf(stderr, "                                  2 = default (realtime 720p on fast embedded GPUs)\n");
  37         fprintf(stderr, "                                  3 = good (realtime 720p on GTX 970 or so)\n");
  38         fprintf(stderr, "                                  4 = best (not realtime on any current GPU)\n");
  39         fprintf(stderr, "  -d, --working-directory DIR     where to store frames and database\n");
  40         fprintf(stderr, "      --http-port PORT            which port to listen on for output\n");
  41         fprintf(stderr, "      --tally-url URL             URL to get tally color from (polled every 100 ms)\n");
  42 }
  43
  44 void parse_flags(int argc, char * const argv[])
  45 {
  46         static const option long_options[] = {
  47                 { "help", no_argument, 0, OPTION_HELP },
  48                 { "width", required_argument, 0, 'w' },
  49                 { "height", required_argument, 0, 'h' },
  50                 { "frame-rate", required_argument, 0, 'r' },
  51                 { "slow-down-input", no_argument, 0, OPTION_SLOW_DOWN_INPUT },
  52                 { "interpolation-quality", required_argument, 0, 'q' },
  53                 { "working-directory", required_argument, 0, 'd' },
  54                 { "http-port", required_argument, 0, OPTION_HTTP_PORT },
  55                 { "tally-url", required_argument, 0, OPTION_TALLY_URL },
  56                 { 0, 0, 0, 0 }
  57         };
  58         for ( ;; ) {
  59                 int option_index = 0;
  60                 int c = getopt_long(argc, argv, "w:h:r:q:d:", long_options, &option_index);
  61
  62                 if (c == -1) {
  63                         break;
  64                 }
  65                 switch (c) {
  66                 case 'w':
  67                         global_flags.width = atoi(optarg);
  68                         break;
  69                 case 'h':
  70                         global_flags.height = atoi(optarg);
  71                         break;
  72                 case 'r': {
  73                         double num, den;
  74                         if (sscanf(optarg, "%lf/%lf", &num, &den) == 2) {
  75                                 global_flags.output_framerate = num / den;
  76                         } else if (sscanf(optarg, "%lf", &num) == 1) {
  77                                 global_flags.output_framerate = num;
  78                         } else {
  79                                 fprintf(stderr, "Invalid frame rate given (must be on the form N or N/M)\n");
  80                                 exit(1);
  81                         }
  82                         break;
  83                 }
  84                 case OPTION_SLOW_DOWN_INPUT:
  85                         global_flags.slow_down_input = true;
  86                         break;
  87                 case 'q':
  88                         global_flags.interpolation_quality = atoi(optarg);
  89                         global_flags.interpolation_quality_set = true;
  90                         break;
  91                 case 'd':
  92                         global_flags.working_directory = optarg;
  93                         break;
  94                 case OPTION_HTTP_PORT:
  95                         global_flags.http_port = atoi(optarg);
  96                         break;
  97                 case OPTION_TALLY_URL:
  98                         global_flags.tally_url = optarg;
  99                         break;
 100                 case OPTION_HELP:
 101                         usage();
 102                         exit(0);
 103                 default:
 104                         fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
 105                         fprintf(stderr, "\n");
 106                         usage();
 107                         exit(1);
 108                 }
 109         }
 110
 111         if (global_flags.interpolation_quality < 0 || global_flags.interpolation_quality > 4) {
 112                 fprintf(stderr, "Interpolation quality must be 0, 1, 2, 3 or 4.\n");
 113                 usage();
 114                 exit(1);
 115         }
 116 }