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