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         OPTION_CUE_POINT_PADDING = 1004
  22 };
  23
  24 void usage()
  25 {
  26         fprintf(stderr, "Usage: futatabi [OPTION]... SOURCE_URL\n");
  27         fprintf(stderr, "\n");
  28         fprintf(stderr, "      --help                      print usage information\n");
  29         fprintf(stderr, "  -w, --width                     output width in pixels (default 1280)\n");
  30         fprintf(stderr, "  -h, --height                    output height in pixels (default 720)\n");
  31         fprintf(stderr, "  -r, --frame-rate NUM[/NUM]      output frame rate, as a float or fraction\n");
  32         fprintf(stderr, "                                    (default 60000/1001 ~= 59.94)\n");
  33         fprintf(stderr, "      --slow-down-input           slow down input to realtime (default on if no\n");
  34         fprintf(stderr, "                                    source URL given)\n");
  35         fprintf(stderr, "  -q, --interpolation-quality N   0 = off\n");
  36         fprintf(stderr, "                                  1 = fastest\n");
  37         fprintf(stderr, "                                  2 = default (realtime 720p on fast embedded GPUs)\n");
  38         fprintf(stderr, "                                  3 = good (realtime 720p on GTX 970 or so)\n");
  39         fprintf(stderr, "                                  4 = best (not realtime on any current GPU)\n");
  40         fprintf(stderr, "      --cue-point-padding SECS    move cue-in/cue-out N seconds earlier/later on set\n");
  41         fprintf(stderr, "  -d, --working-directory DIR     where to store frames and database\n");
  42         fprintf(stderr, "      --http-port PORT            which port to listen on for output\n");
  43         fprintf(stderr, "      --tally-url URL             URL to get tally color from (polled every 100 ms)\n");
  44 }
  45
  46 void parse_flags(int argc, char * const argv[])
  47 {
  48         static const option long_options[] = {
  49                 { "help", no_argument, 0, OPTION_HELP },
  50                 { "width", required_argument, 0, 'w' },
  51                 { "height", required_argument, 0, 'h' },
  52                 { "frame-rate", required_argument, 0, 'r' },
  53                 { "slow-down-input", no_argument, 0, OPTION_SLOW_DOWN_INPUT },
  54                 { "interpolation-quality", required_argument, 0, 'q' },
  55                 { "working-directory", required_argument, 0, 'd' },
  56                 { "http-port", required_argument, 0, OPTION_HTTP_PORT },
  57                 { "tally-url", required_argument, 0, OPTION_TALLY_URL },
  58                 { "cue-point-padding", required_argument, 0, OPTION_CUE_POINT_PADDING },
  59                 { 0, 0, 0, 0 }
  60         };
  61         for ( ;; ) {
  62                 int option_index = 0;
  63                 int c = getopt_long(argc, argv, "w:h:r:q:d:", long_options, &option_index);
  64
  65                 if (c == -1) {
  66                         break;
  67                 }
  68                 switch (c) {
  69                 case 'w':
  70                         global_flags.width = atoi(optarg);
  71                         break;
  72                 case 'h':
  73                         global_flags.height = atoi(optarg);
  74                         break;
  75                 case 'r': {
  76                         double num, den;
  77                         if (sscanf(optarg, "%lf/%lf", &num, &den) == 2) {
  78                                 global_flags.output_framerate = num / den;
  79                         } else if (sscanf(optarg, "%lf", &num) == 1) {
  80                                 global_flags.output_framerate = num;
  81                         } else {
  82                                 fprintf(stderr, "Invalid frame rate given (must be on the form N or N/M)\n");
  83                                 exit(1);
  84                         }
  85                         break;
  86                 }
  87                 case OPTION_SLOW_DOWN_INPUT:
  88                         global_flags.slow_down_input = true;
  89                         break;
  90                 case 'q':
  91                         global_flags.interpolation_quality = atoi(optarg);
  92                         global_flags.interpolation_quality_set = true;
  93                         break;
  94                 case 'd':
  95                         global_flags.working_directory = optarg;
  96                         break;
  97                 case OPTION_HTTP_PORT:
  98                         global_flags.http_port = atoi(optarg);
  99                         break;
 100                 case OPTION_TALLY_URL:
 101                         global_flags.tally_url = optarg;
 102                         break;
 103                 case OPTION_CUE_POINT_PADDING:
 104                         global_flags.cue_point_padding_seconds = atof(optarg);
 105                         global_flags.cue_point_padding_set = true;
 106                         break;
 107                 case OPTION_HELP:
 108                         usage();
 109                         exit(0);
 110                 default:
 111                         fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
 112                         fprintf(stderr, "\n");
 113                         usage();
 114                         exit(1);
 115                 }
 116         }
 117
 118         if (global_flags.interpolation_quality < 0 || global_flags.interpolation_quality > 4) {
 119                 fprintf(stderr, "Interpolation quality must be 0, 1, 2, 3 or 4.\n");
 120                 usage();
 121                 exit(1);
 122         }
 123         if (global_flags.cue_point_padding_seconds < 0.0) {
 124                 fprintf(stderr, "Cue point padding cannot be negative.\n");
 125                 usage();
 126                 exit(1);
 127         }
 128 }