git.sesse.net Git - nageru/blob - 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
  14 void usage()
  15 {
  16         fprintf(stderr, "Usage: nageru [OPTION]...\n");
  17         fprintf(stderr, "\n");
  18         fprintf(stderr, "  -h, --help                      print usage information\n");
  19         fprintf(stderr, "  -c, --num-cards                 set number of input cards (default 2)\n");
  20         fprintf(stderr, "  -t, --theme=FILE                choose theme (default theme.lua)\n");
  21         fprintf(stderr, "  -v, --va-display=SPEC           VA-API device for H.264 encoding\n");
  22         fprintf(stderr, "                                    ($DISPLAY spec or /dev/dri/render* path)\n");
  23         fprintf(stderr, "  -m, --map-signal=SIGNAL,CARD    set a default card mapping (can be given multiple times)\n");
  24         fprintf(stderr, "      --http-uncompressed-video   send uncompressed NV12 video to HTTP clients\n");
  25         fprintf(stderr, "      --http-x264-video           send x264-compressed video to HTTP clients\n");
  26         fprintf(stderr, "      --x264-preset               x264 quality preset (default " X264_DEFAULT_PRESET ")\n");
  27         fprintf(stderr, "      --x264-tune                 x264 tuning (default " X264_DEFAULT_TUNE ", can be blank)\n");
  28         fprintf(stderr, "      --x264-bitrate              x264 bitrate (in kilobit/sec, default %d)\n",
  29                 DEFAULT_X264_OUTPUT_BIT_RATE);
  30         fprintf(stderr, "      --x264-vbv-bufsize          x264 VBV size (in kilobits, 0 = one-frame VBV,\n");
  31         fprintf(stderr, "                                  default: same as --x264-bitrate, that is, one-second VBV)\n");
  32         fprintf(stderr, "      --x264-vbv-max-bitrate      x264 local max bitrate (in kilobit/sec per --vbv-bufsize,\n");
  33         fprintf(stderr, "                                  0 = no limit, default: same as --x264-bitrate, i.e., CBR)\n");
  34         fprintf(stderr, "      --http-mux=NAME             mux to use for HTTP streams (default " DEFAULT_STREAM_MUX_NAME ")\n");
  35         fprintf(stderr, "      --http-audio-codec=NAME     audio codec to use for HTTP streams\n");
  36         fprintf(stderr, "                                  (default is to use the same as for the recording)\n");
  37         fprintf(stderr, "      --http-audio-bitrate=KBITS  audio codec bit rate to use for HTTP streams\n");
  38         fprintf(stderr, "                                  (default is %d, ignored unless --http-audio-codec is set)\n",
  39                 DEFAULT_AUDIO_OUTPUT_BIT_RATE / 1000);
  40         fprintf(stderr, "      --http-coarse-timebase      use less timebase for HTTP (recommended for muxers\n");
  41         fprintf(stderr, "                                  that handle large pts poorly, like e.g. MP4)\n");
  42         fprintf(stderr, "      --flat-audio                start with most audio processing turned off\n");
  43         fprintf(stderr, "      --disable-alsa-output       disable audio monitoring via ALSA\n");
  44         fprintf(stderr, "      --no-flush-pbos             do not explicitly signal texture data uploads\n");
  45         fprintf(stderr, "                                    (will give display corruption, but makes it\n");
  46         fprintf(stderr, "                                    possible to run with apitrace in real time)\n");
  47 }
  48
  49 void parse_flags(int argc, char * const argv[])
  50 {
  51         static const option long_options[] = {
  52                 { "help", no_argument, 0, 'h' },
  53                 { "num-cards", required_argument, 0, 'c' },
  54                 { "theme", required_argument, 0, 't' },
  55                 { "map-signal", required_argument, 0, 'm' },
  56                 { "va-display", required_argument, 0, 1000 },
  57                 { "http-uncompressed-video", no_argument, 0, 1001 },
  58                 { "http-x264-video", no_argument, 0, 1008 },
  59                 { "x264-preset", required_argument, 0, 1009 },
  60                 { "x264-tune", required_argument, 0, 1010 },
  61                 { "x264-bitrate", required_argument, 0, 1011 },
  62                 { "x264-vbv-bufsize", required_argument, 0, 1012 },
  63                 { "x264-vbv-max-bitrate", required_argument, 0, 1013 },
  64                 { "http-mux", required_argument, 0, 1004 },
  65                 { "http-coarse-timebase", no_argument, 0, 1005 },
  66                 { "http-audio-codec", required_argument, 0, 1006 },
  67                 { "http-audio-bitrate", required_argument, 0, 1007 },
  68                 { "flat-audio", no_argument, 0, 1002 },
  69                 { "disable-alsa-output", no_argument, 0, 1014 },
  70                 { "no-flush-pbos", no_argument, 0, 1003 },
  71                 { 0, 0, 0, 0 }
  72         };
  73         for ( ;; ) {
  74                 int option_index = 0;
  75                 int c = getopt_long(argc, argv, "c:t:", long_options, &option_index);
  76
  77                 if (c == -1) {
  78                         break;
  79                 }
  80                 switch (c) {
  81                 case 'c':
  82                         global_flags.num_cards = atoi(optarg);
  83                         break;
  84                 case 't':
  85                         global_flags.theme_filename = optarg;
  86                         break;
  87                 case 'm': {
  88                         char *ptr = strchr(optarg, ',');
  89                         if (ptr == nullptr) {
  90                                 fprintf(stderr, "ERROR: Invalid argument '%s' to --map-signal (needs a signal and a card number, separated by comma)\n", optarg);
  91                                 exit(1);
  92                         }
  93                         *ptr = '\0';
  94                         const int signal_num = atoi(optarg);
  95                         const int card_num = atoi(ptr + 1);
  96                         if (global_flags.default_stream_mapping.count(signal_num)) {
  97                                 fprintf(stderr, "ERROR: Signal %d already mapped to card %d\n",
  98                                         signal_num, global_flags.default_stream_mapping[signal_num]);
  99                                 exit(1);
 100                         }
 101                         global_flags.default_stream_mapping[signal_num] = card_num;
 102                         break;
 103                 }
 104                 case 1000:
 105                         global_flags.va_display = optarg;
 106                         break;
 107                 case 1001:
 108                         global_flags.uncompressed_video_to_http = true;
 109                         break;
 110                 case 1004:
 111                         global_flags.stream_mux_name = optarg;
 112                         break;
 113                 case 1005:
 114                         global_flags.stream_coarse_timebase = true;
 115                         break;
 116                 case 1006:
 117                         global_flags.stream_audio_codec_name = optarg;
 118                         break;
 119                 case 1007:
 120                         global_flags.stream_audio_codec_bitrate = atoi(optarg) * 1000;
 121                         break;
 122                 case 1008:
 123                         global_flags.x264_video_to_http = true;
 124                         break;
 125                 case 1009:
 126                         global_flags.x264_preset = optarg;
 127                         break;
 128                 case 1010:
 129                         global_flags.x264_tune = optarg;
 130                         break;
 131                 case 1011:
 132                         global_flags.x264_bitrate = atoi(optarg);
 133                         break;
 134                 case 1012:
 135                         global_flags.x264_vbv_buffer_size = atoi(optarg);
 136                         break;
 137                 case 1013:
 138                         global_flags.x264_vbv_max_bitrate = atoi(optarg);
 139                         break;
 140                 case 1002:
 141                         global_flags.flat_audio = true;
 142                         break;
 143                 case 1014:
 144                         global_flags.enable_alsa_output = false;
 145                         break;
 146                 case 1003:
 147                         global_flags.flush_pbos = false;
 148                         break;
 149                 case 'h':
 150                         usage();
 151                         exit(0);
 152                 default:
 153                         fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
 154                         fprintf(stderr, "\n");
 155                         usage();
 156                         exit(1);
 157                 }
 158         }
 159
 160         if (global_flags.uncompressed_video_to_http &&
 161             global_flags.x264_video_to_http) {
 162                 fprintf(stderr, "ERROR: --http-uncompressed-video and --http-x264-video are mutually incompatible\n");
 163                 exit(1);
 164         }
 165         for (pair<int, int> mapping : global_flags.default_stream_mapping) {
 166                 if (mapping.second >= global_flags.num_cards) {
 167                         fprintf(stderr, "ERROR: Signal %d mapped to card %d, which doesn't exist (try adjusting --num-cards)\n",
 168                                 mapping.first, mapping.second);
 169                         exit(1);
 170                 }
 171         }
 172 }