]> git.sesse.net Git - nageru/blob - futatabi/flags.cpp
Errors in flags do not need core dumps.
[nageru] / 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 #include <utility>
8
9 using namespace std;
10
11 Flags global_flags;
12 int flow_initialized_interpolation_quality;
13
14 // Long options that have no corresponding short option.
15 enum LongOption {
16         OPTION_HELP = 1000,
17         OPTION_SLOW_DOWN_INPUT = 1001,
18         OPTION_HTTP_PORT = 1002,
19         OPTION_TALLY_URL = 1003,
20         OPTION_CUE_IN_POINT_PADDING = 1004,
21         OPTION_CUE_OUT_POINT_PADDING = 1005,
22         OPTION_MIDI_MAPPING = 1006
23 };
24
25 void usage()
26 {
27         fprintf(stderr, "Usage: futatabi [OPTION]... SOURCE_URL\n");
28         fprintf(stderr, "\n");
29         fprintf(stderr, "      --help                      print usage information\n");
30         fprintf(stderr, "  -w, --width                     output width in pixels (default 1280)\n");
31         fprintf(stderr, "  -h, --height                    output height in pixels (default 720)\n");
32         fprintf(stderr, "  -r, --frame-rate NUM[/NUM]      output frame rate, as a float or fraction\n");
33         fprintf(stderr, "                                    (default 60000/1001 ~= 59.94)\n");
34         fprintf(stderr, "      --slow-down-input           slow down input to realtime (default on if no\n");
35         fprintf(stderr, "                                    source URL given)\n");
36         fprintf(stderr, "  -q, --interpolation-quality N   0 = off\n");
37         fprintf(stderr, "                                  1 = fastest\n");
38         fprintf(stderr, "                                  2 = default (realtime 720p on fast embedded GPUs)\n");
39         fprintf(stderr, "                                  3 = good (realtime 720p on GTX 970 or so)\n");
40         fprintf(stderr, "                                  4 = best (not realtime on any current GPU)\n");
41         fprintf(stderr, "      --cue-in-point-padding SECS   move cue-in N seconds earlier on set\n");
42         fprintf(stderr, "      --cue-out-point-padding SECS  move cue-out N seconds later on set\n");
43         fprintf(stderr, "  -d, --working-directory DIR     where to store frames and database\n");
44         fprintf(stderr, "      --http-port PORT            which port to listen on for output\n");
45         fprintf(stderr, "      --tally-url URL             URL to get tally color from (polled every 100 ms)\n");
46         fprintf(stderr, "      --midi-mapping=FILE         start with the given MIDI controller mapping\n");
47 }
48
49 void parse_flags(int argc, char *const argv[])
50 {
51         static const option long_options[] = {
52                 { "help", no_argument, 0, OPTION_HELP },
53                 { "width", required_argument, 0, 'w' },
54                 { "height", required_argument, 0, 'h' },
55                 { "frame-rate", required_argument, 0, 'r' },
56                 { "slow-down-input", no_argument, 0, OPTION_SLOW_DOWN_INPUT },
57                 { "interpolation-quality", required_argument, 0, 'q' },
58                 { "working-directory", required_argument, 0, 'd' },
59                 { "http-port", required_argument, 0, OPTION_HTTP_PORT },
60                 { "tally-url", required_argument, 0, OPTION_TALLY_URL },
61                 { "cue-in-point-padding", required_argument, 0, OPTION_CUE_IN_POINT_PADDING },
62                 { "cue-out-point-padding", required_argument, 0, OPTION_CUE_OUT_POINT_PADDING },
63                 { "midi-mapping", required_argument, 0, OPTION_MIDI_MAPPING },
64                 { 0, 0, 0, 0 }
65         };
66         for (;;) {
67                 int option_index = 0;
68                 int c = getopt_long(argc, argv, "w:h:r:q:d:", long_options, &option_index);
69
70                 if (c == -1) {
71                         break;
72                 }
73                 switch (c) {
74                 case 'w':
75                         global_flags.width = atoi(optarg);
76                         break;
77                 case 'h':
78                         global_flags.height = atoi(optarg);
79                         break;
80                 case 'r': {
81                         double num, den;
82                         if (sscanf(optarg, "%lf/%lf", &num, &den) == 2) {
83                                 global_flags.output_framerate = num / den;
84                         } else if (sscanf(optarg, "%lf", &num) == 1) {
85                                 global_flags.output_framerate = num;
86                         } else {
87                                 fprintf(stderr, "Invalid frame rate given (must be on the form N or N/M)\n");
88                                 exit(1);
89                         }
90                         break;
91                 }
92                 case OPTION_SLOW_DOWN_INPUT:
93                         global_flags.slow_down_input = true;
94                         break;
95                 case 'q':
96                         global_flags.interpolation_quality = atoi(optarg);
97                         global_flags.interpolation_quality_set = true;
98                         break;
99                 case 'd':
100                         global_flags.working_directory = optarg;
101                         break;
102                 case OPTION_HTTP_PORT:
103                         global_flags.http_port = atoi(optarg);
104                         break;
105                 case OPTION_TALLY_URL:
106                         global_flags.tally_url = optarg;
107                         break;
108                 case OPTION_CUE_IN_POINT_PADDING:
109                         global_flags.cue_in_point_padding_seconds = atof(optarg);
110                         global_flags.cue_in_point_padding_set = true;
111                         break;
112                 case OPTION_CUE_OUT_POINT_PADDING:
113                         global_flags.cue_out_point_padding_seconds = atof(optarg);
114                         global_flags.cue_out_point_padding_set = true;
115                         break;
116                 case OPTION_MIDI_MAPPING:
117                         global_flags.midi_mapping_filename = optarg;
118                         break;
119                 case OPTION_HELP:
120                         usage();
121                         exit(0);
122                 default:
123                         fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
124                         fprintf(stderr, "\n");
125                         usage();
126                         exit(1);
127                 }
128         }
129
130         if (global_flags.interpolation_quality < 0 || global_flags.interpolation_quality > 4) {
131                 fprintf(stderr, "Interpolation quality must be 0, 1, 2, 3 or 4.\n");
132                 usage();
133                 exit(1);
134         }
135         if (global_flags.cue_in_point_padding_seconds < 0.0 ||
136             global_flags.cue_out_point_padding_seconds < 0.0) {
137                 fprintf(stderr, "Cue point padding cannot be negative.\n");
138                 usage();
139                 exit(1);
140         }
141 }