git.sesse.net Git - nageru/blob - nageru/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 // Long options that have no corresponding short option.
  15 enum LongOption {
  16         OPTION_HELP = 1000,
  17         OPTION_FULLSCREEN,
  18         OPTION_MULTICHANNEL,
  19         OPTION_MIDI_MAPPING,
  20         OPTION_DEFAULT_HDMI_INPUT,
  21         OPTION_FAKE_CARDS_AUDIO,
  22         OPTION_V4L_OUTPUT,
  23         OPTION_HTTP_UNCOMPRESSED_VIDEO,
  24         OPTION_HTTP_X264_VIDEO,
  25         OPTION_RECORD_X264_VIDEO,
  26         OPTION_X264_PRESET,
  27         OPTION_X264_TUNE,
  28         OPTION_X264_SPEEDCONTROL,
  29         OPTION_X264_SPEEDCONTROL_VERBOSE,
  30         OPTION_X264_BITRATE,
  31         OPTION_X264_CRF,
  32         OPTION_X264_VBV_BUFSIZE,
  33         OPTION_X264_VBV_MAX_BITRATE,
  34         OPTION_X264_PARAM,
  35         OPTION_HTTP_MUX,
  36         OPTION_HTTP_COARSE_TIMEBASE,
  37         OPTION_HTTP_AUDIO_CODEC,
  38         OPTION_HTTP_AUDIO_BITRATE,
  39         OPTION_HTTP_PORT,
  40         OPTION_NO_TRANSCODE_AUDIO,
  41         OPTION_DISABLE_AUDIO,
  42         OPTION_FLAT_AUDIO,
  43         OPTION_GAIN_STAGING,
  44         OPTION_DISABLE_LOCUT,
  45         OPTION_ENABLE_LOCUT,
  46         OPTION_DISABLE_GAIN_STAGING_AUTO,
  47         OPTION_ENABLE_GAIN_STAGING_AUTO,
  48         OPTION_DISABLE_COMPRESSOR,
  49         OPTION_ENABLE_COMPRESSOR,
  50         OPTION_DISABLE_LIMITER,
  51         OPTION_ENABLE_LIMITER,
  52         OPTION_DISABLE_MAKEUP_GAIN_AUTO,
  53         OPTION_ENABLE_MAKEUP_GAIN_AUTO,
  54         OPTION_DISABLE_ALSA_OUTPUT,
  55         OPTION_NO_FLUSH_PBOS,
  56         OPTION_PRINT_VIDEO_LATENCY,
  57         OPTION_MAX_INPUT_QUEUE_FRAMES,
  58         OPTION_AUDIO_QUEUE_LENGTH_MS,
  59         OPTION_OUTPUT_YCBCR_COEFFICIENTS,
  60         OPTION_OUTPUT_BUFFER_FRAMES,
  61         OPTION_OUTPUT_SLOP_FRAMES,
  62         OPTION_TIMECODE_STREAM,
  63         OPTION_TIMECODE_STDOUT,
  64         OPTION_QUICK_CUT_KEYS,
  65         OPTION_10_BIT_INPUT,
  66         OPTION_10_BIT_OUTPUT,
  67         OPTION_INPUT_YCBCR_INTERPRETATION,
  68         OPTION_MJPEG_EXPORT_CARDS,
  69 };
  70
  71 map<unsigned, unsigned> parse_mjpeg_export_cards(char *optarg)
  72 {
  73         map<unsigned, unsigned> ret;
  74         if (optarg[0] == '\0') {
  75                 return ret;
  76         }
  77
  78         unsigned stream_idx = 0;
  79         char *start = optarg;
  80         for ( ;; ) {
  81                 char *end = strchr(start, ',');
  82                 if (end != nullptr) {
  83                         *end = '\0';
  84                 }
  85
  86                 unsigned range_begin, range_end;
  87                 if (sscanf(start, "%u-%u", &range_begin, &range_end) != 2) {
  88                         range_begin = range_end = atoi(start);
  89                 }
  90                 if (range_end < range_begin) {
  91                         fprintf(stderr, "ERROR: Invalid range %u-%u in --mjpeg-export-cards=\n", range_begin, range_end);
  92                         exit(1);
  93                 }
  94                 if (range_end >= unsigned(global_flags.num_cards)) {
  95                         // There are situations where we could possibly want to
  96                         // include FFmpeg inputs (CEF inputs are unlikely),
  97                         // but they're not necessarily in 4:2:2 Y'CbCr, so it would
  98                         // require more functionality the the JPEG encoder.
  99                         fprintf(stderr, "ERROR: Asked for (zero-indexed) card %u in --mjpeg-export-cards=, but there are only %u cards\n",
 100                                 range_end, global_flags.num_cards);
 101                         exit(1);
 102                 }
 103                 for (unsigned card_idx = range_begin; card_idx <= range_end; ++card_idx) {
 104                         if (ret.count(card_idx)) {
 105                                 fprintf(stderr, "ERROR: Card %u was given twice in --mjpeg-export-cards=\n", card_idx);
 106                                 exit(1);
 107                         }
 108                         ret[card_idx] = stream_idx++;
 109                 }
 110                 if (end == nullptr) {
 111                         break;
 112                 } else {
 113                         start = end + 1;
 114                 }
 115         }
 116         return ret;
 117 }
 118
 119 void usage(Program program)
 120 {
 121         if (program == PROGRAM_KAERU) {
 122                 fprintf(stderr, "Usage: kaeru [OPTION]... SOURCE_URL\n");
 123         } else {
 124                 fprintf(stderr, "Usage: nageru [OPTION]...\n");
 125         }
 126         fprintf(stderr, "\n");
 127         fprintf(stderr, "      --help                      print usage information\n");
 128         if (program == PROGRAM_NAGERU) {
 129                 fprintf(stderr, "      --fullscreen                run in full screen, with no decorations\n");
 130         }
 131         fprintf(stderr, "  -w, --width                     output width in pixels (default 1280)\n");
 132         fprintf(stderr, "  -h, --height                    output height in pixels (default 720)\n");
 133         if (program == PROGRAM_NAGERU) {
 134                 fprintf(stderr, "  -c, --num-cards                 set number of input cards (default 2)\n");
 135                 fprintf(stderr, "  -o, --output-card=CARD          also output signal to the given card (default none)\n");
 136                 fprintf(stderr, "  -t, --theme=FILE                choose theme (default theme.lua)\n");
 137                 fprintf(stderr, "  -I, --theme-dir=DIR             search for theme in this directory (can be given multiple times)\n");
 138                 fprintf(stderr, "  -r, --recording-dir=DIR         where to store disk recording\n");
 139                 fprintf(stderr, "  -v, --va-display=SPEC           VA-API device for H.264 encoding\n");
 140                 fprintf(stderr, "                                    ($DISPLAY spec or /dev/dri/render* path)\n");
 141                 fprintf(stderr, "  -m, --map-signal=SIGNAL,CARD    set a default card mapping (can be given multiple times)\n");
 142                 fprintf(stderr, "  -M, --input-mapping=FILE        start with the given audio input mapping (implies --multichannel)\n");
 143                 fprintf(stderr, "      --multichannel              start in multichannel audio mapping mode\n");
 144                 fprintf(stderr, "      --midi-mapping=FILE         start with the given MIDI controller mapping (implies --multichannel)\n");
 145                 fprintf(stderr, "      --default-hdmi-input        default to HDMI over SDI inputs for cards that have both\n");
 146                 fprintf(stderr, "      --fake-cards-audio          make fake (disconnected) cards output a simple tone\n");
 147                 fprintf(stderr, "      --v4l-output DEVICE         send video (no audio) to V4L2 output/loopback\n");
 148                 fprintf(stderr, "      --http-uncompressed-video   send uncompressed NV12 video to HTTP clients\n");
 149                 fprintf(stderr, "      --http-x264-video           send x264-compressed video to HTTP clients\n");
 150                 fprintf(stderr, "      --record-x264-video         store x264-compressed video to disk (implies --http-x264-video,\n");
 151                 fprintf(stderr, "                                    removes the need for working VA-API encoding)\n");
 152         }
 153         fprintf(stderr, "      --x264-preset               x264 quality preset (default " X264_DEFAULT_PRESET ")\n");
 154         fprintf(stderr, "      --x264-tune                 x264 tuning (default " X264_DEFAULT_TUNE ", can be blank)\n");
 155         fprintf(stderr, "      --x264-speedcontrol         try to match x264 preset to available CPU speed\n");
 156         fprintf(stderr, "      --x264-speedcontrol-verbose  output speedcontrol debugging statistics\n");
 157         fprintf(stderr, "      --x264-bitrate              x264 bitrate (in kilobit/sec, default %d)\n",
 158                 DEFAULT_X264_OUTPUT_BIT_RATE);
 159         fprintf(stderr, "      --x264-crf=VALUE            quality-based VBR (-12 to 51), incompatible with --x264-bitrate and VBV\n");
 160         fprintf(stderr, "      --x264-vbv-bufsize          x264 VBV size (in kilobits, 0 = one-frame VBV,\n");
 161         fprintf(stderr, "                                  default: same as --x264-bitrate, that is, one-second VBV)\n");
 162         fprintf(stderr, "      --x264-vbv-max-bitrate      x264 local max bitrate (in kilobit/sec per --vbv-bufsize,\n");
 163         fprintf(stderr, "                                  0 = no limit, default: same as --x264-bitrate, i.e., CBR)\n");
 164         fprintf(stderr, "      --x264-param=NAME[,VALUE]   set any x264 parameter, for fine tuning\n");
 165         fprintf(stderr, "      --http-mux=NAME             mux to use for HTTP streams (default " DEFAULT_STREAM_MUX_NAME ")\n");
 166         fprintf(stderr, "      --http-audio-codec=NAME     audio codec to use for HTTP streams\n");
 167         fprintf(stderr, "                                  (default is to use the same as for the recording)\n");
 168         fprintf(stderr, "      --http-audio-bitrate=KBITS  audio codec bit rate to use for HTTP streams\n");
 169         fprintf(stderr, "                                  (default is %d, ignored unless --http-audio-codec is set)\n",
 170                 DEFAULT_AUDIO_OUTPUT_BIT_RATE / 1000);
 171         fprintf(stderr, "      --http-port=PORT            which port to use for the built-in HTTP server\n");
 172         fprintf(stderr, "                                  (default is %d)\n", DEFAULT_HTTPD_PORT);
 173         if (program == PROGRAM_KAERU) {
 174                 fprintf(stderr, "      --no-transcode-audio        copy encoded audio raw from the source stream\n");
 175                 fprintf(stderr, "                                    (requires --http-audio-codec= to be set)\n");
 176                 fprintf(stderr, "      --disable-audio             do not include any audio in the stream\n");
 177         }
 178         if (program == PROGRAM_NAGERU) {
 179                 fprintf(stderr, "      --flat-audio                start with most audio processing turned off\n");
 180                 fprintf(stderr, "                                    (can be overridden by e.g. --enable-limiter)\n");
 181                 fprintf(stderr, "      --gain-staging=DB           set initial gain staging to the given value\n");
 182                 fprintf(stderr, "                                    (--disable-gain-staging-auto)\n");
 183                 fprintf(stderr, "      --disable-locut             turn off locut filter (also --enable)\n");
 184                 fprintf(stderr, "      --disable-gain-staging-auto  turn off automatic gain staging (also --enable)\n");
 185                 fprintf(stderr, "      --disable-compressor        turn off regular compressor (also --enable)\n");
 186                 fprintf(stderr, "      --disable-limiter           turn off limiter (also --enable)\n");
 187                 fprintf(stderr, "      --disable-makeup-gain-auto  turn off auto-adjustment of final makeup gain (also --enable)\n");
 188                 fprintf(stderr, "      --disable-alsa-output       disable audio monitoring via ALSA\n");
 189                 fprintf(stderr, "      --no-flush-pbos             do not explicitly signal texture data uploads\n");
 190                 fprintf(stderr, "                                    (will give display corruption, but makes it\n");
 191                 fprintf(stderr, "                                    possible to run with apitrace in real time)\n");
 192                 fprintf(stderr, "      --print-video-latency       print out measurements of video latency on stdout\n");
 193                 fprintf(stderr, "      --max-input-queue-frames=FRAMES  never keep more than FRAMES frames for each card\n");
 194                 fprintf(stderr, "                                    (default 6, minimum 1)\n");
 195                 fprintf(stderr, "      --audio-queue-length-ms=MS  length of audio resampling queue (default 100.0)\n");
 196                 fprintf(stderr, "      --output-ycbcr-coefficients={rec601,rec709,auto}\n");
 197                 fprintf(stderr, "                                  Y'CbCr coefficient standard of output (default auto)\n");
 198                 fprintf(stderr, "                                    auto is rec601, unless --output-card is used\n");
 199                 fprintf(stderr, "                                    and a Rec. 709 mode (typically HD modes) is in use\n");
 200                 fprintf(stderr, "      --output-buffer-frames=NUM  number of frames in output buffer for --output-card,\n");
 201                 fprintf(stderr, "                                    can be fractional (default 6.0); note also\n");
 202                 fprintf(stderr, "                                    the audio queue can't be much longer than this\n");
 203                 fprintf(stderr, "      --output-slop-frames=NUM    if more less than this number of frames behind for\n");
 204                 fprintf(stderr, "                                    --output-card, try to submit anyway instead of\n");
 205                 fprintf(stderr, "                                    dropping the frame (default 0.5)\n");
 206                 fprintf(stderr, "      --timecode-stream           show timestamp and timecode in stream\n");
 207                 fprintf(stderr, "      --timecode-stdout           show timestamp and timecode on standard output\n");
 208                 fprintf(stderr, "      --quick-cut-keys            enable direct cutting by Q, W, E, ... keys\n");
 209                 fprintf(stderr, "      --10-bit-input              use 10-bit video input (requires compute shaders)\n");
 210                 fprintf(stderr, "      --10-bit-output             use 10-bit video output (requires compute shaders,\n");
 211                 fprintf(stderr, "                                    implies --record-x264-video)\n");
 212                 fprintf(stderr, "      --input-ycbcr-interpretation=CARD,{rec601,rec709,auto}[,{limited,full}]\n");
 213                 fprintf(stderr, "                                  Y'CbCr coefficient standard of card CARD (default auto)\n");
 214                 fprintf(stderr, "                                    auto is rec601 for SD, rec709 for HD, always limited\n");
 215                 fprintf(stderr, "                                    limited means standard 0-240/0-235 input range (for 8-bit)\n");
 216                 fprintf(stderr, "      --mjpeg-export-cards=RANGE[,RANGE...]\n");
 217                 fprintf(stderr, "                                  export the given cards in MJPEG format to /multicam.mp4,\n");
 218                 fprintf(stderr, "                                    in the given order (ranges can be either single card indexes\n");
 219                 fprintf(stderr, "                                    or pairs like 1-3 for camera 1,2,3; default is all cards)\n");
 220         }
 221 }
 222
 223 void parse_flags(Program program, int argc, char * const argv[])
 224 {
 225         static const option long_options[] = {
 226                 { "help", no_argument, 0, OPTION_HELP },
 227                 { "fullscreen", no_argument, 0, OPTION_FULLSCREEN },
 228                 { "width", required_argument, 0, 'w' },
 229                 { "height", required_argument, 0, 'h' },
 230                 { "num-cards", required_argument, 0, 'c' },
 231                 { "output-card", required_argument, 0, 'o' },
 232                 { "theme", required_argument, 0, 't' },
 233                 { "theme-dir", required_argument, 0, 'I' },
 234                 { "recording-dir", required_argument, 0, 'r' },
 235                 { "map-signal", required_argument, 0, 'm' },
 236                 { "input-mapping", required_argument, 0, 'M' },
 237                 { "va-display", required_argument, 0, 'v' },
 238                 { "multichannel", no_argument, 0, OPTION_MULTICHANNEL },
 239                 { "midi-mapping", required_argument, 0, OPTION_MIDI_MAPPING },
 240                 { "default-hdmi-input", no_argument, 0, OPTION_DEFAULT_HDMI_INPUT },
 241                 { "fake-cards-audio", no_argument, 0, OPTION_FAKE_CARDS_AUDIO },
 242                 { "v4l-output", required_argument, 0, OPTION_V4L_OUTPUT },
 243                 { "http-uncompressed-video", no_argument, 0, OPTION_HTTP_UNCOMPRESSED_VIDEO },
 244                 { "http-x264-video", no_argument, 0, OPTION_HTTP_X264_VIDEO },
 245                 { "record-x264-video", no_argument, 0, OPTION_RECORD_X264_VIDEO },
 246                 { "x264-preset", required_argument, 0, OPTION_X264_PRESET },
 247                 { "x264-tune", required_argument, 0, OPTION_X264_TUNE },
 248                 { "x264-speedcontrol", no_argument, 0, OPTION_X264_SPEEDCONTROL },
 249                 { "x264-speedcontrol-verbose", no_argument, 0, OPTION_X264_SPEEDCONTROL_VERBOSE },
 250                 { "x264-bitrate", required_argument, 0, OPTION_X264_BITRATE },
 251                 { "x264-crf", required_argument, 0, OPTION_X264_CRF },
 252                 { "x264-vbv-bufsize", required_argument, 0, OPTION_X264_VBV_BUFSIZE },
 253                 { "x264-vbv-max-bitrate", required_argument, 0, OPTION_X264_VBV_MAX_BITRATE },
 254                 { "x264-param", required_argument, 0, OPTION_X264_PARAM },
 255                 { "http-mux", required_argument, 0, OPTION_HTTP_MUX },
 256                 { "http-audio-codec", required_argument, 0, OPTION_HTTP_AUDIO_CODEC },
 257                 { "http-audio-bitrate", required_argument, 0, OPTION_HTTP_AUDIO_BITRATE },
 258                 { "http-port", required_argument, 0, OPTION_HTTP_PORT },
 259                 { "no-transcode-audio", no_argument, 0, OPTION_NO_TRANSCODE_AUDIO },
 260                 { "disable-audio", no_argument, 0, OPTION_DISABLE_AUDIO },
 261                 { "flat-audio", no_argument, 0, OPTION_FLAT_AUDIO },
 262                 { "gain-staging", required_argument, 0, OPTION_GAIN_STAGING },
 263                 { "disable-locut", no_argument, 0, OPTION_DISABLE_LOCUT },
 264                 { "enable-locut", no_argument, 0, OPTION_ENABLE_LOCUT },
 265                 { "disable-gain-staging-auto", no_argument, 0, OPTION_DISABLE_GAIN_STAGING_AUTO },
 266                 { "enable-gain-staging-auto", no_argument, 0, OPTION_ENABLE_GAIN_STAGING_AUTO },
 267                 { "disable-compressor", no_argument, 0, OPTION_DISABLE_COMPRESSOR },
 268                 { "enable-compressor", no_argument, 0, OPTION_ENABLE_COMPRESSOR },
 269                 { "disable-limiter", no_argument, 0, OPTION_DISABLE_LIMITER },
 270                 { "enable-limiter", no_argument, 0, OPTION_ENABLE_LIMITER },
 271                 { "disable-makeup-gain-auto", no_argument, 0, OPTION_DISABLE_MAKEUP_GAIN_AUTO },
 272                 { "enable-makeup-gain-auto", no_argument, 0, OPTION_ENABLE_MAKEUP_GAIN_AUTO },
 273                 { "disable-alsa-output", no_argument, 0, OPTION_DISABLE_ALSA_OUTPUT },
 274                 { "no-flush-pbos", no_argument, 0, OPTION_NO_FLUSH_PBOS },
 275                 { "print-video-latency", no_argument, 0, OPTION_PRINT_VIDEO_LATENCY },
 276                 { "max-input-queue-frames", required_argument, 0, OPTION_MAX_INPUT_QUEUE_FRAMES },
 277                 { "audio-queue-length-ms", required_argument, 0, OPTION_AUDIO_QUEUE_LENGTH_MS },
 278                 { "output-ycbcr-coefficients", required_argument, 0, OPTION_OUTPUT_YCBCR_COEFFICIENTS },
 279                 { "output-buffer-frames", required_argument, 0, OPTION_OUTPUT_BUFFER_FRAMES },
 280                 { "output-slop-frames", required_argument, 0, OPTION_OUTPUT_SLOP_FRAMES },
 281                 { "timecode-stream", no_argument, 0, OPTION_TIMECODE_STREAM },
 282                 { "timecode-stdout", no_argument, 0, OPTION_TIMECODE_STDOUT },
 283                 { "quick-cut-keys", no_argument, 0, OPTION_QUICK_CUT_KEYS },
 284                 { "10-bit-input", no_argument, 0, OPTION_10_BIT_INPUT },
 285                 { "10-bit-output", no_argument, 0, OPTION_10_BIT_OUTPUT },
 286                 { "input-ycbcr-interpretation", required_argument, 0, OPTION_INPUT_YCBCR_INTERPRETATION },
 287                 { "mjpeg-export-cards", required_argument, 0, OPTION_MJPEG_EXPORT_CARDS },
 288                 { 0, 0, 0, 0 }
 289         };
 290         vector<string> theme_dirs;
 291         string output_ycbcr_coefficients = "auto";
 292         bool card_to_mjpeg_stream_export_set = false;
 293         for ( ;; ) {
 294                 int option_index = 0;
 295                 int c = getopt_long(argc, argv, "c:o:t:I:r:v:m:M:w:h:", long_options, &option_index);
 296
 297                 if (c == -1) {
 298                         break;
 299                 }
 300                 switch (c) {
 301                 case 'w':
 302                         global_flags.width = atoi(optarg);
 303                         break;
 304                 case 'h':
 305                         global_flags.height = atoi(optarg);
 306                         break;
 307                 case 'c':
 308                         global_flags.num_cards = atoi(optarg);
 309                         break;
 310                 case 'o':
 311                         global_flags.output_card = atoi(optarg);
 312                         break;
 313                 case 't':
 314                         global_flags.theme_filename = optarg;
 315                         break;
 316                 case 'I':
 317                         theme_dirs.push_back(optarg);
 318                         break;
 319                 case 'r':
 320                         global_flags.recording_dir = optarg;
 321                         break;
 322                 case 'm': {
 323                         char *ptr = strchr(optarg, ',');
 324                         if (ptr == nullptr) {
 325                                 fprintf(stderr, "ERROR: Invalid argument '%s' to --map-signal (needs a signal and a card number, separated by comma)\n", optarg);
 326                                 exit(1);
 327                         }
 328                         *ptr = '\0';
 329                         const int signal_num = atoi(optarg);
 330                         const int card_num = atoi(ptr + 1);
 331                         if (global_flags.default_stream_mapping.count(signal_num)) {
 332                                 fprintf(stderr, "ERROR: Signal %d already mapped to card %d\n",
 333                                         signal_num, global_flags.default_stream_mapping[signal_num]);
 334                                 exit(1);
 335                         }
 336                         global_flags.default_stream_mapping[signal_num] = card_num;
 337                         break;
 338                 }
 339                 case 'M':
 340                         global_flags.input_mapping_filename = optarg;
 341                         break;
 342                 case OPTION_MULTICHANNEL:
 343                         global_flags.multichannel_mapping_mode = true;
 344                         break;
 345                 case 'v':
 346                         global_flags.va_display = optarg;
 347                         break;
 348                 case OPTION_MIDI_MAPPING:
 349                         global_flags.midi_mapping_filename = optarg;
 350                         global_flags.multichannel_mapping_mode = true;
 351                         break;
 352                 case OPTION_DEFAULT_HDMI_INPUT:
 353                         global_flags.default_hdmi_input = true;
 354                         break;
 355                 case OPTION_FAKE_CARDS_AUDIO:
 356                         global_flags.fake_cards_audio = true;
 357                         break;
 358                 case OPTION_V4L_OUTPUT:
 359                         global_flags.v4l_output_device = optarg;
 360                         break;
 361                 case OPTION_HTTP_UNCOMPRESSED_VIDEO:
 362                         global_flags.uncompressed_video_to_http = true;
 363                         break;
 364                 case OPTION_HTTP_MUX:
 365                         global_flags.stream_mux_name = optarg;
 366                         break;
 367                 case OPTION_HTTP_AUDIO_CODEC:
 368                         global_flags.stream_audio_codec_name = optarg;
 369                         break;
 370                 case OPTION_HTTP_AUDIO_BITRATE:
 371                         global_flags.stream_audio_codec_bitrate = atoi(optarg) * 1000;
 372                         break;
 373                 case OPTION_HTTP_PORT:
 374                         global_flags.http_port = atoi(optarg);
 375                         break;
 376                 case OPTION_NO_TRANSCODE_AUDIO:
 377                         global_flags.transcode_audio = false;
 378                         break;
 379                 case OPTION_DISABLE_AUDIO:
 380                         global_flags.transcode_audio = false;
 381                         global_flags.enable_audio = false;
 382                         break;
 383                 case OPTION_HTTP_X264_VIDEO:
 384                         global_flags.x264_video_to_http = true;
 385                         break;
 386                 case OPTION_RECORD_X264_VIDEO:
 387                         global_flags.x264_video_to_disk = true;
 388                         global_flags.x264_video_to_http = true;
 389                         break;
 390                 case OPTION_X264_PRESET:
 391                         global_flags.x264_preset = optarg;
 392                         break;
 393                 case OPTION_X264_TUNE:
 394                         global_flags.x264_tune = optarg;
 395                         break;
 396                 case OPTION_X264_SPEEDCONTROL:
 397                         global_flags.x264_speedcontrol = true;
 398                         break;
 399                 case OPTION_X264_SPEEDCONTROL_VERBOSE:
 400                         global_flags.x264_speedcontrol_verbose = true;
 401                         break;
 402                 case OPTION_X264_BITRATE:
 403                         global_flags.x264_bitrate = atoi(optarg);
 404                         break;
 405                 case OPTION_X264_CRF:
 406                         global_flags.x264_crf = atof(optarg);
 407                         break;
 408                 case OPTION_X264_VBV_BUFSIZE:
 409                         global_flags.x264_vbv_buffer_size = atoi(optarg);
 410                         break;
 411                 case OPTION_X264_VBV_MAX_BITRATE:
 412                         global_flags.x264_vbv_max_bitrate = atoi(optarg);
 413                         break;
 414                 case OPTION_X264_PARAM:
 415                         global_flags.x264_extra_param.push_back(optarg);
 416                         break;
 417                 case OPTION_FLAT_AUDIO:
 418                         // If --flat-audio is given, turn off everything that messes with the sound,
 419                         // except the final makeup gain.
 420                         global_flags.locut_enabled = false;
 421                         global_flags.gain_staging_auto = false;
 422                         global_flags.compressor_enabled = false;
 423                         global_flags.limiter_enabled = false;
 424                         break;
 425                 case OPTION_GAIN_STAGING:
 426                         global_flags.initial_gain_staging_db = atof(optarg);
 427                         global_flags.gain_staging_auto = false;
 428                         break;
 429                 case OPTION_DISABLE_LOCUT:
 430                         global_flags.locut_enabled = false;
 431                         break;
 432                 case OPTION_ENABLE_LOCUT:
 433                         global_flags.locut_enabled = true;
 434                         break;
 435                 case OPTION_DISABLE_GAIN_STAGING_AUTO:
 436                         global_flags.gain_staging_auto = false;
 437                         break;
 438                 case OPTION_ENABLE_GAIN_STAGING_AUTO:
 439                         global_flags.gain_staging_auto = true;
 440                         break;
 441                 case OPTION_DISABLE_COMPRESSOR:
 442                         global_flags.compressor_enabled = false;
 443                         break;
 444                 case OPTION_ENABLE_COMPRESSOR:
 445                         global_flags.compressor_enabled = true;
 446                         break;
 447                 case OPTION_DISABLE_LIMITER:
 448                         global_flags.limiter_enabled = false;
 449                         break;
 450                 case OPTION_ENABLE_LIMITER:
 451                         global_flags.limiter_enabled = true;
 452                         break;
 453                 case OPTION_DISABLE_MAKEUP_GAIN_AUTO:
 454                         global_flags.final_makeup_gain_auto = false;
 455                         break;
 456                 case OPTION_ENABLE_MAKEUP_GAIN_AUTO:
 457                         global_flags.final_makeup_gain_auto = true;
 458                         break;
 459                 case OPTION_DISABLE_ALSA_OUTPUT:
 460                         global_flags.enable_alsa_output = false;
 461                         break;
 462                 case OPTION_NO_FLUSH_PBOS:
 463                         global_flags.flush_pbos = false;
 464                         break;
 465                 case OPTION_PRINT_VIDEO_LATENCY:
 466                         global_flags.print_video_latency = true;
 467                         break;
 468                 case OPTION_MAX_INPUT_QUEUE_FRAMES:
 469                         global_flags.max_input_queue_frames = atoi(optarg);
 470                         break;
 471                 case OPTION_AUDIO_QUEUE_LENGTH_MS:
 472                         global_flags.audio_queue_length_ms = atof(optarg);
 473                         break;
 474                 case OPTION_OUTPUT_YCBCR_COEFFICIENTS:
 475                         output_ycbcr_coefficients = optarg;
 476                         break;
 477                 case OPTION_OUTPUT_BUFFER_FRAMES:
 478                         global_flags.output_buffer_frames = atof(optarg);
 479                         break;
 480                 case OPTION_OUTPUT_SLOP_FRAMES:
 481                         global_flags.output_slop_frames = atof(optarg);
 482                         break;
 483                 case OPTION_TIMECODE_STREAM:
 484                         global_flags.display_timecode_in_stream = true;
 485                         break;
 486                 case OPTION_TIMECODE_STDOUT:
 487                         global_flags.display_timecode_on_stdout = true;
 488                         break;
 489                 case OPTION_QUICK_CUT_KEYS:
 490                         global_flags.enable_quick_cut_keys = true;
 491                         break;
 492                 case OPTION_10_BIT_INPUT:
 493                         global_flags.ten_bit_input = true;
 494                         break;
 495                 case OPTION_10_BIT_OUTPUT:
 496                         global_flags.ten_bit_output = true;
 497                         global_flags.x264_video_to_disk = true;
 498                         global_flags.x264_video_to_http = true;
 499                         global_flags.x264_bit_depth = 10;
 500                         break;
 501                 case OPTION_INPUT_YCBCR_INTERPRETATION: {
 502                         char *ptr = strchr(optarg, ',');
 503                         if (ptr == nullptr) {
 504                                 fprintf(stderr, "ERROR: Invalid argument '%s' to --input-ycbcr-interpretation (needs a card and an interpretation, separated by comma)\n", optarg);
 505                                 exit(1);
 506                         }
 507                         *ptr = '\0';
 508                         const int card_num = atoi(optarg);
 509                         if (card_num < 0 || card_num >= MAX_VIDEO_CARDS) {
 510                                 fprintf(stderr, "ERROR: Invalid card number %d\n", card_num);
 511                                 exit(1);
 512                         }
 513
 514                         YCbCrInterpretation interpretation;
 515                         char *interpretation_str = ptr + 1;
 516                         ptr = strchr(interpretation_str, ',');
 517                         if (ptr != nullptr) {
 518                                 *ptr = '\0';
 519                                 const char *range = ptr + 1;
 520                                 if (strcmp(range, "full") == 0) {
 521                                         interpretation.full_range = true;
 522                                 } else if (strcmp(range, "limited") == 0) {
 523                                         interpretation.full_range = false;
 524                                 } else {
 525                                         fprintf(stderr, "ERROR: Invalid Y'CbCr range '%s' (must be “full” or “limited”)\n", range);
 526                                         exit(1);
 527                                 }
 528                         }
 529
 530                         if (strcmp(interpretation_str, "rec601") == 0) {
 531                                 interpretation.ycbcr_coefficients_auto = false;
 532                                 interpretation.ycbcr_coefficients = movit::YCBCR_REC_601;
 533                         } else if (strcmp(interpretation_str, "rec709") == 0) {
 534                                 interpretation.ycbcr_coefficients_auto = false;
 535                                 interpretation.ycbcr_coefficients = movit::YCBCR_REC_709;
 536                         } else if (strcmp(interpretation_str, "auto") == 0) {
 537                                 interpretation.ycbcr_coefficients_auto = true;
 538                                 if (interpretation.full_range) {
 539                                         fprintf(stderr, "ERROR: Cannot use “auto” Y'CbCr coefficients with full range\n");
 540                                         exit(1);
 541                                 }
 542                         } else {
 543                                 fprintf(stderr, "ERROR: Invalid Y'CbCr coefficients '%s' (must be “rec601”, “rec709” or “auto”)\n", interpretation_str);
 544                                 exit(1);
 545                         }
 546                         global_flags.ycbcr_interpretation[card_num] = interpretation;
 547                         break;
 548                 }
 549                 case OPTION_FULLSCREEN:
 550                         global_flags.fullscreen = true;
 551                         break;
 552                 case OPTION_MJPEG_EXPORT_CARDS: {
 553                         if (card_to_mjpeg_stream_export_set) {
 554                                 fprintf(stderr, "ERROR: --mjpeg-export-cards given twice\n");
 555                                 exit(1);
 556                         }
 557                         global_flags.card_to_mjpeg_stream_export = parse_mjpeg_export_cards(optarg);
 558                         card_to_mjpeg_stream_export_set = true;
 559                         break;
 560                 }
 561                 case OPTION_HELP:
 562                         usage(program);
 563                         exit(0);
 564                 default:
 565                         fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
 566                         fprintf(stderr, "\n");
 567                         usage(program);
 568                         exit(1);
 569                 }
 570         }
 571
 572         if (global_flags.uncompressed_video_to_http &&
 573             global_flags.x264_video_to_http) {
 574                 fprintf(stderr, "ERROR: --http-uncompressed-video and --http-x264-video are mutually incompatible\n");
 575                 exit(1);
 576         }
 577         if (global_flags.num_cards <= 0) {
 578                 fprintf(stderr, "ERROR: --num-cards must be at least 1\n");
 579                 exit(1);
 580         }
 581         if (global_flags.output_card < -1 ||
 582             global_flags.output_card >= global_flags.num_cards) {
 583                 fprintf(stderr, "ERROR: --output-card points to a nonexistant card\n");
 584                 exit(1);
 585         }
 586         if (global_flags.enable_audio && !global_flags.transcode_audio && global_flags.stream_audio_codec_name.empty()) {
 587                 fprintf(stderr, "ERROR: If not transcoding audio, you must specify ahead-of-time what audio codec is in use\n");
 588                 fprintf(stderr, "       (using --http-audio-codec).\n");
 589                 exit(1);
 590         }
 591         if (global_flags.x264_speedcontrol) {
 592                 if (!global_flags.x264_preset.empty() && global_flags.x264_preset != "faster") {
 593                         fprintf(stderr, "WARNING: --x264-preset is overridden by --x264-speedcontrol (implicitly uses \"faster\" as base preset)\n");
 594                 }
 595                 global_flags.x264_preset = "faster";
 596         } else if (global_flags.x264_preset.empty()) {
 597                 global_flags.x264_preset = X264_DEFAULT_PRESET;
 598         }
 599         if (!theme_dirs.empty()) {
 600                 global_flags.theme_dirs = theme_dirs;
 601         }
 602
 603         // In reality, we could probably do with any even value (we subsample
 604         // by two in some places), but it's better to be on the safe side
 605         // wrt. video codecs and such. (I'd set 16 if I could, but 1080 isn't
 606         // divisible by 16.)
 607         if (global_flags.width <= 0 || (global_flags.width % 8) != 0 ||
 608             global_flags.height <= 0 || (global_flags.height % 8) != 0) {
 609                 fprintf(stderr, "ERROR: --width and --height must be positive integers divisible by 8\n");
 610                 exit(1);
 611         }
 612
 613         for (pair<int, int> mapping : global_flags.default_stream_mapping) {
 614                 if (mapping.second >= global_flags.num_cards) {
 615                         fprintf(stderr, "ERROR: Signal %d mapped to card %d, which doesn't exist (try adjusting --num-cards)\n",
 616                                 mapping.first, mapping.second);
 617                         exit(1);
 618                 }
 619         }
 620
 621         // Rec. 709 would be the sane thing to do, but it seems many players
 622         // just default to BT.601 coefficients no matter what. We _do_ set
 623         // the right flags, so that a player that works properly doesn't have
 624         // to guess, but it's frequently ignored. See discussions
 625         // in e.g. https://trac.ffmpeg.org/ticket/4978; the situation with
 626         // browsers is complicated and depends on things like hardware acceleration
 627         // (https://bugs.chromium.org/p/chromium/issues/detail?id=333619 for
 628         // extensive discussion). VLC generally fixed this as part of 3.0.0
 629         // (see e.g. https://github.com/videolan/vlc/commit/bc71288b2e38c07d6921472824b92eef1aa85f7e
 630         // and https://github.com/videolan/vlc/commit/c3fc2683a9cde1d42674ebf9935dced05733a215),
 631         // but earlier versions were pretty random.
 632         //
 633         // On the other hand, HDMI/SDI output typically requires Rec. 709 for
 634         // HD resolutions (with no way of signaling anything else), which is
 635         // a conflicting demand. In this case, we typically let the HDMI/SDI
 636         // output win if it is active, but the user can override this.
 637         if (output_ycbcr_coefficients == "auto") {
 638                 // Essentially: BT.709 if HDMI/SDI output is on, otherwise BT.601.
 639                 global_flags.ycbcr_rec709_coefficients = false;
 640                 global_flags.ycbcr_auto_coefficients = true;
 641         } else if (output_ycbcr_coefficients == "rec709") {
 642                 global_flags.ycbcr_rec709_coefficients = true;
 643                 global_flags.ycbcr_auto_coefficients = false;
 644         } else if (output_ycbcr_coefficients == "rec601") {
 645                 global_flags.ycbcr_rec709_coefficients = false;
 646                 global_flags.ycbcr_auto_coefficients = false;
 647         } else {
 648                 fprintf(stderr, "ERROR: --output-ycbcr-coefficients must be “rec601”, “rec709” or “auto”\n");
 649                 exit(1);
 650         }
 651
 652         if (global_flags.output_buffer_frames < 0.0f) {
 653                 // Actually, even zero probably won't make sense; there is some internal
 654                 // delay to the card.
 655                 fprintf(stderr, "ERROR: --output-buffer-frames can't be negative.\n");
 656                 exit(1);
 657         }
 658         if (global_flags.output_slop_frames < 0.0f) {
 659                 fprintf(stderr, "ERROR: --output-slop-frames can't be negative.\n");
 660                 exit(1);
 661         }
 662         if (global_flags.max_input_queue_frames < 1) {
 663                 fprintf(stderr, "ERROR: --max-input-queue-frames must be at least 1.\n");
 664                 exit(1);
 665         }
 666         if (global_flags.max_input_queue_frames > 10) {
 667                 fprintf(stderr, "WARNING: --max-input-queue-frames has little effect over 10.\n");
 668         }
 669
 670         if (!isinf(global_flags.x264_crf)) {  // CRF mode is selected.
 671                 if (global_flags.x264_bitrate != -1) {
 672                         fprintf(stderr, "ERROR: --x264-bitrate and --x264-crf are mutually incompatible.\n");
 673                         exit(1);
 674                 }
 675                 if (global_flags.x264_vbv_max_bitrate != -1 && global_flags.x264_vbv_buffer_size != -1) {
 676                         fprintf(stderr, "WARNING: VBV settings are ignored with --x264-crf.\n");
 677                 }
 678         } else if (global_flags.x264_bitrate == -1) {
 679                 global_flags.x264_bitrate = DEFAULT_X264_OUTPUT_BIT_RATE;
 680         }
 681
 682         if (!card_to_mjpeg_stream_export_set) {
 683                 // Fill in the default mapping (export all cards, in order).
 684                 for (unsigned card_idx = 0; card_idx < unsigned(global_flags.num_cards); ++card_idx) {
 685                         global_flags.card_to_mjpeg_stream_export[card_idx] = card_idx;
 686                 }
 687         }
 688 }