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 // Long options that have no corresponding short option.
  15 enum LongOption {
  16         OPTION_HELP = 1000,
  17         OPTION_MULTICHANNEL,
  18         OPTION_MIDI_MAPPING,
  19         OPTION_FAKE_CARDS_AUDIO,
  20         OPTION_HTTP_UNCOMPRESSED_VIDEO,
  21         OPTION_HTTP_X264_VIDEO,
  22         OPTION_RECORD_X264_VIDEO,
  23         OPTION_X264_PRESET,
  24         OPTION_X264_TUNE,
  25         OPTION_X264_SPEEDCONTROL,
  26         OPTION_X264_SPEEDCONTROL_VERBOSE,
  27         OPTION_X264_BITRATE,
  28         OPTION_X264_CRF,
  29         OPTION_X264_VBV_BUFSIZE,
  30         OPTION_X264_VBV_MAX_BITRATE,
  31         OPTION_X264_PARAM,
  32         OPTION_HTTP_MUX,
  33         OPTION_HTTP_COARSE_TIMEBASE,
  34         OPTION_HTTP_AUDIO_CODEC,
  35         OPTION_HTTP_AUDIO_BITRATE,
  36         OPTION_FLAT_AUDIO,
  37         OPTION_GAIN_STAGING,
  38         OPTION_DISABLE_LOCUT,
  39         OPTION_ENABLE_LOCUT,
  40         OPTION_DISABLE_GAIN_STAGING_AUTO,
  41         OPTION_ENABLE_GAIN_STAGING_AUTO,
  42         OPTION_DISABLE_COMPRESSOR,
  43         OPTION_ENABLE_COMPRESSOR,
  44         OPTION_DISABLE_LIMITER,
  45         OPTION_ENABLE_LIMITER,
  46         OPTION_DISABLE_MAKEUP_GAIN_AUTO,
  47         OPTION_ENABLE_MAKEUP_GAIN_AUTO,
  48         OPTION_DISABLE_ALSA_OUTPUT,
  49         OPTION_NO_FLUSH_PBOS,
  50         OPTION_PRINT_VIDEO_LATENCY,
  51         OPTION_MAX_INPUT_QUEUE_FRAMES,
  52         OPTION_AUDIO_QUEUE_LENGTH_MS,
  53         OPTION_OUTPUT_YCBCR_COEFFICIENTS,
  54         OPTION_OUTPUT_BUFFER_FRAMES,
  55         OPTION_OUTPUT_SLOP_FRAMES,
  56         OPTION_TIMECODE_STREAM,
  57         OPTION_TIMECODE_STDOUT,
  58         OPTION_10_BIT_INPUT,
  59         OPTION_10_BIT_OUTPUT,
  60         OPTION_INPUT_YCBCR_INTERPRETATION,
  61 };
  62
  63 void usage(Program program)
  64 {
  65         if (program == PROGRAM_KAERU) {
  66                 fprintf(stderr, "Usage: kaeru [OPTION]... SOURCE_URL\n");
  67         } else {
  68                 fprintf(stderr, "Usage: nageru [OPTION]...\n");
  69         }
  70         fprintf(stderr, "\n");
  71         fprintf(stderr, "      --help                      print usage information\n");
  72         fprintf(stderr, "  -w, --width                     output width in pixels (default 1280)\n");
  73         fprintf(stderr, "  -h, --height                    output height in pixels (default 720)\n");
  74         if (program == PROGRAM_NAGERU) {
  75                 fprintf(stderr, "  -c, --num-cards                 set number of input cards (default 2)\n");
  76                 fprintf(stderr, "  -o, --output-card=CARD          also output signal to the given card (default none)\n");
  77                 fprintf(stderr, "  -t, --theme=FILE                choose theme (default theme.lua)\n");
  78                 fprintf(stderr, "  -I, --theme-dir=DIR             search for theme in this directory (can be given multiple times)\n");
  79                 fprintf(stderr, "  -r, --recording-dir=DIR         where to store disk recording\n");
  80                 fprintf(stderr, "  -v, --va-display=SPEC           VA-API device for H.264 encoding\n");
  81                 fprintf(stderr, "                                    ($DISPLAY spec or /dev/dri/render* path)\n");
  82                 fprintf(stderr, "  -m, --map-signal=SIGNAL,CARD    set a default card mapping (can be given multiple times)\n");
  83                 fprintf(stderr, "  -M, --input-mapping=FILE        start with the given audio input mapping (implies --multichannel)\n");
  84                 fprintf(stderr, "      --multichannel              start in multichannel audio mapping mode\n");
  85                 fprintf(stderr, "      --midi-mapping=FILE         start with the given MIDI controller mapping (implies --multichannel)\n");
  86                 fprintf(stderr, "      --fake-cards-audio          make fake (disconnected) cards output a simple tone\n");
  87                 fprintf(stderr, "      --http-uncompressed-video   send uncompressed NV12 video to HTTP clients\n");
  88                 fprintf(stderr, "      --http-x264-video           send x264-compressed video to HTTP clients\n");
  89                 fprintf(stderr, "      --record-x264-video         store x264-compressed video to disk (implies --http-x264-video,\n");
  90                 fprintf(stderr, "                                    removes the need for working VA-API encoding)\n");
  91         }
  92         fprintf(stderr, "      --x264-preset               x264 quality preset (default " X264_DEFAULT_PRESET ")\n");
  93         fprintf(stderr, "      --x264-tune                 x264 tuning (default " X264_DEFAULT_TUNE ", can be blank)\n");
  94         fprintf(stderr, "      --x264-speedcontrol         try to match x264 preset to available CPU speed\n");
  95         fprintf(stderr, "      --x264-speedcontrol-verbose  output speedcontrol debugging statistics\n");
  96         fprintf(stderr, "      --x264-bitrate              x264 bitrate (in kilobit/sec, default %d)\n",
  97                 DEFAULT_X264_OUTPUT_BIT_RATE);
  98         fprintf(stderr, "      --x264-crf=VALUE            quality-based VBR (-12 to 51), incompatible with --x264-bitrate and VBV\n");
  99         fprintf(stderr, "      --x264-vbv-bufsize          x264 VBV size (in kilobits, 0 = one-frame VBV,\n");
 100         fprintf(stderr, "                                  default: same as --x264-bitrate, that is, one-second VBV)\n");
 101         fprintf(stderr, "      --x264-vbv-max-bitrate      x264 local max bitrate (in kilobit/sec per --vbv-bufsize,\n");
 102         fprintf(stderr, "                                  0 = no limit, default: same as --x264-bitrate, i.e., CBR)\n");
 103         fprintf(stderr, "      --x264-param=NAME[,VALUE]   set any x264 parameter, for fine tuning\n");
 104         fprintf(stderr, "      --http-mux=NAME             mux to use for HTTP streams (default " DEFAULT_STREAM_MUX_NAME ")\n");
 105         fprintf(stderr, "      --http-audio-codec=NAME     audio codec to use for HTTP streams\n");
 106         fprintf(stderr, "                                  (default is to use the same as for the recording)\n");
 107         fprintf(stderr, "      --http-audio-bitrate=KBITS  audio codec bit rate to use for HTTP streams\n");
 108         fprintf(stderr, "                                  (default is %d, ignored unless --http-audio-codec is set)\n",
 109                 DEFAULT_AUDIO_OUTPUT_BIT_RATE / 1000);
 110         fprintf(stderr, "      --http-coarse-timebase      use less timebase for HTTP (recommended for muxers\n");
 111         fprintf(stderr, "                                  that handle large pts poorly, like e.g. MP4)\n");
 112         if (program == PROGRAM_NAGERU) {
 113                 fprintf(stderr, "      --flat-audio                start with most audio processing turned off\n");
 114                 fprintf(stderr, "                                    (can be overridden by e.g. --enable-limiter)\n");
 115                 fprintf(stderr, "      --gain-staging=DB           set initial gain staging to the given value\n");
 116                 fprintf(stderr, "                                    (--disable-gain-staging-auto)\n");
 117                 fprintf(stderr, "      --disable-locut             turn off locut filter (also --enable)\n");
 118                 fprintf(stderr, "      --disable-gain-staging-auto  turn off automatic gain staging (also --enable)\n");
 119                 fprintf(stderr, "      --disable-compressor        turn off regular compressor (also --enable)\n");
 120                 fprintf(stderr, "      --disable-limiter           turn off limiter (also --enable)\n");
 121                 fprintf(stderr, "      --disable-makeup-gain-auto  turn off auto-adjustment of final makeup gain (also --enable)\n");
 122                 fprintf(stderr, "      --disable-alsa-output       disable audio monitoring via ALSA\n");
 123                 fprintf(stderr, "      --no-flush-pbos             do not explicitly signal texture data uploads\n");
 124                 fprintf(stderr, "                                    (will give display corruption, but makes it\n");
 125                 fprintf(stderr, "                                    possible to run with apitrace in real time)\n");
 126                 fprintf(stderr, "      --print-video-latency       print out measurements of video latency on stdout\n");
 127                 fprintf(stderr, "      --max-input-queue-frames=FRAMES  never keep more than FRAMES frames for each card\n");
 128                 fprintf(stderr, "                                    (default 6, minimum 1)\n");
 129                 fprintf(stderr, "      --audio-queue-length-ms=MS  length of audio resampling queue (default 100.0)\n");
 130                 fprintf(stderr, "      --output-ycbcr-coefficients={rec601,rec709,auto}\n");
 131                 fprintf(stderr, "                                  Y'CbCr coefficient standard of output (default auto)\n");
 132                 fprintf(stderr, "                                    auto is rec601, unless --output-card is used\n");
 133                 fprintf(stderr, "                                    and a Rec. 709 mode (typically HD modes) is in use\n");
 134                 fprintf(stderr, "      --output-buffer-frames=NUM  number of frames in output buffer for --output-card,\n");
 135                 fprintf(stderr, "                                    can be fractional (default 6.0); note also\n");
 136                 fprintf(stderr, "                                    the audio queue can't be much longer than this\n");
 137                 fprintf(stderr, "      --output-slop-frames=NUM    if more less than this number of frames behind for\n");
 138                 fprintf(stderr, "                                    --output-card, try to submit anyway instead of\n");
 139                 fprintf(stderr, "                                    dropping the frame (default 0.5)\n");
 140                 fprintf(stderr, "      --timecode-stream           show timestamp and timecode in stream\n");
 141                 fprintf(stderr, "      --timecode-stdout           show timestamp and timecode on standard output\n");
 142                 fprintf(stderr, "      --10-bit-input              use 10-bit video input (requires compute shaders)\n");
 143                 fprintf(stderr, "      --10-bit-output             use 10-bit video output (requires compute shaders,\n");
 144                 fprintf(stderr, "                                    implies --record-x264-video)\n");
 145                 fprintf(stderr, "      --input-ycbcr-interpretation=CARD,{rec601,rec709,auto}[,{limited,full}]\n");
 146                 fprintf(stderr, "                                  Y'CbCr coefficient standard of card CARD (default auto)\n");
 147                 fprintf(stderr, "                                    auto is rec601 for SD, rec709 for HD, always limited\n");
 148                 fprintf(stderr, "                                    limited means standard 0-240/0-235 input range (for 8-bit)\n");
 149         }
 150 }
 151
 152 void parse_flags(Program program, int argc, char * const argv[])
 153 {
 154         static const option long_options[] = {
 155                 { "help", no_argument, 0, OPTION_HELP },
 156                 { "width", required_argument, 0, 'w' },
 157                 { "height", required_argument, 0, 'h' },
 158                 { "num-cards", required_argument, 0, 'c' },
 159                 { "output-card", required_argument, 0, 'o' },
 160                 { "theme", required_argument, 0, 't' },
 161                 { "theme-dir", required_argument, 0, 'I' },
 162                 { "recording-dir", required_argument, 0, 'r' },
 163                 { "map-signal", required_argument, 0, 'm' },
 164                 { "input-mapping", required_argument, 0, 'M' },
 165                 { "va-display", required_argument, 0, 'v' },
 166                 { "multichannel", no_argument, 0, OPTION_MULTICHANNEL },
 167                 { "midi-mapping", required_argument, 0, OPTION_MIDI_MAPPING },
 168                 { "fake-cards-audio", no_argument, 0, OPTION_FAKE_CARDS_AUDIO },
 169                 { "http-uncompressed-video", no_argument, 0, OPTION_HTTP_UNCOMPRESSED_VIDEO },
 170                 { "http-x264-video", no_argument, 0, OPTION_HTTP_X264_VIDEO },
 171                 { "record-x264-video", no_argument, 0, OPTION_RECORD_X264_VIDEO },
 172                 { "x264-preset", required_argument, 0, OPTION_X264_PRESET },
 173                 { "x264-tune", required_argument, 0, OPTION_X264_TUNE },
 174                 { "x264-speedcontrol", no_argument, 0, OPTION_X264_SPEEDCONTROL },
 175                 { "x264-speedcontrol-verbose", no_argument, 0, OPTION_X264_SPEEDCONTROL_VERBOSE },
 176                 { "x264-bitrate", required_argument, 0, OPTION_X264_BITRATE },
 177                 { "x264-crf", required_argument, 0, OPTION_X264_CRF },
 178                 { "x264-vbv-bufsize", required_argument, 0, OPTION_X264_VBV_BUFSIZE },
 179                 { "x264-vbv-max-bitrate", required_argument, 0, OPTION_X264_VBV_MAX_BITRATE },
 180                 { "x264-param", required_argument, 0, OPTION_X264_PARAM },
 181                 { "http-mux", required_argument, 0, OPTION_HTTP_MUX },
 182                 { "http-coarse-timebase", no_argument, 0, OPTION_HTTP_COARSE_TIMEBASE },
 183                 { "http-audio-codec", required_argument, 0, OPTION_HTTP_AUDIO_CODEC },
 184                 { "http-audio-bitrate", required_argument, 0, OPTION_HTTP_AUDIO_BITRATE },
 185                 { "flat-audio", no_argument, 0, OPTION_FLAT_AUDIO },
 186                 { "gain-staging", required_argument, 0, OPTION_GAIN_STAGING },
 187                 { "disable-locut", no_argument, 0, OPTION_DISABLE_LOCUT },
 188                 { "enable-locut", no_argument, 0, OPTION_ENABLE_LOCUT },
 189                 { "disable-gain-staging-auto", no_argument, 0, OPTION_DISABLE_GAIN_STAGING_AUTO },
 190                 { "enable-gain-staging-auto", no_argument, 0, OPTION_ENABLE_GAIN_STAGING_AUTO },
 191                 { "disable-compressor", no_argument, 0, OPTION_DISABLE_COMPRESSOR },
 192                 { "enable-compressor", no_argument, 0, OPTION_ENABLE_COMPRESSOR },
 193                 { "disable-limiter", no_argument, 0, OPTION_DISABLE_LIMITER },
 194                 { "enable-limiter", no_argument, 0, OPTION_ENABLE_LIMITER },
 195                 { "disable-makeup-gain-auto", no_argument, 0, OPTION_DISABLE_MAKEUP_GAIN_AUTO },
 196                 { "enable-makeup-gain-auto", no_argument, 0, OPTION_ENABLE_MAKEUP_GAIN_AUTO },
 197                 { "disable-alsa-output", no_argument, 0, OPTION_DISABLE_ALSA_OUTPUT },
 198                 { "no-flush-pbos", no_argument, 0, OPTION_NO_FLUSH_PBOS },
 199                 { "print-video-latency", no_argument, 0, OPTION_PRINT_VIDEO_LATENCY },
 200                 { "max-input-queue-frames", required_argument, 0, OPTION_MAX_INPUT_QUEUE_FRAMES },
 201                 { "audio-queue-length-ms", required_argument, 0, OPTION_AUDIO_QUEUE_LENGTH_MS },
 202                 { "output-ycbcr-coefficients", required_argument, 0, OPTION_OUTPUT_YCBCR_COEFFICIENTS },
 203                 { "output-buffer-frames", required_argument, 0, OPTION_OUTPUT_BUFFER_FRAMES },
 204                 { "output-slop-frames", required_argument, 0, OPTION_OUTPUT_SLOP_FRAMES },
 205                 { "timecode-stream", no_argument, 0, OPTION_TIMECODE_STREAM },
 206                 { "timecode-stdout", no_argument, 0, OPTION_TIMECODE_STDOUT },
 207                 { "10-bit-input", no_argument, 0, OPTION_10_BIT_INPUT },
 208                 { "10-bit-output", no_argument, 0, OPTION_10_BIT_OUTPUT },
 209                 { "input-ycbcr-interpretation", required_argument, 0, OPTION_INPUT_YCBCR_INTERPRETATION },
 210                 { 0, 0, 0, 0 }
 211         };
 212         vector<string> theme_dirs;
 213         string output_ycbcr_coefficients = "auto";
 214         for ( ;; ) {
 215                 int option_index = 0;
 216                 int c = getopt_long(argc, argv, "c:t:I:r:v:m:M:w:h:", long_options, &option_index);
 217
 218                 if (c == -1) {
 219                         break;
 220                 }
 221                 switch (c) {
 222                 case 'w':
 223                         global_flags.width = atoi(optarg);
 224                         break;
 225                 case 'h':
 226                         global_flags.height = atoi(optarg);
 227                         break;
 228                 case 'c':
 229                         global_flags.num_cards = atoi(optarg);
 230                         break;
 231                 case 'o':
 232                         global_flags.output_card = atoi(optarg);
 233                         break;
 234                 case 't':
 235                         global_flags.theme_filename = optarg;
 236                         break;
 237                 case 'I':
 238                         theme_dirs.push_back(optarg);
 239                         break;
 240                 case 'r':
 241                         global_flags.recording_dir = optarg;
 242                         break;
 243                 case 'm': {
 244                         char *ptr = strchr(optarg, ',');
 245                         if (ptr == nullptr) {
 246                                 fprintf(stderr, "ERROR: Invalid argument '%s' to --map-signal (needs a signal and a card number, separated by comma)\n", optarg);
 247                                 exit(1);
 248                         }
 249                         *ptr = '\0';
 250                         const int signal_num = atoi(optarg);
 251                         const int card_num = atoi(ptr + 1);
 252                         if (global_flags.default_stream_mapping.count(signal_num)) {
 253                                 fprintf(stderr, "ERROR: Signal %d already mapped to card %d\n",
 254                                         signal_num, global_flags.default_stream_mapping[signal_num]);
 255                                 exit(1);
 256                         }
 257                         global_flags.default_stream_mapping[signal_num] = card_num;
 258                         break;
 259                 }
 260                 case 'M':
 261                         global_flags.input_mapping_filename = optarg;
 262                         break;
 263                 case OPTION_MULTICHANNEL:
 264                         global_flags.multichannel_mapping_mode = true;
 265                         break;
 266                 case 'v':
 267                         global_flags.va_display = optarg;
 268                         break;
 269                 case OPTION_MIDI_MAPPING:
 270                         global_flags.midi_mapping_filename = optarg;
 271                         global_flags.multichannel_mapping_mode = true;
 272                         break;
 273                 case OPTION_FAKE_CARDS_AUDIO:
 274                         global_flags.fake_cards_audio = true;
 275                         break;
 276                 case OPTION_HTTP_UNCOMPRESSED_VIDEO:
 277                         global_flags.uncompressed_video_to_http = true;
 278                         break;
 279                 case OPTION_HTTP_MUX:
 280                         global_flags.stream_mux_name = optarg;
 281                         break;
 282                 case OPTION_HTTP_COARSE_TIMEBASE:
 283                         global_flags.stream_coarse_timebase = true;
 284                         break;
 285                 case OPTION_HTTP_AUDIO_CODEC:
 286                         global_flags.stream_audio_codec_name = optarg;
 287                         break;
 288                 case OPTION_HTTP_AUDIO_BITRATE:
 289                         global_flags.stream_audio_codec_bitrate = atoi(optarg) * 1000;
 290                         break;
 291                 case OPTION_HTTP_X264_VIDEO:
 292                         global_flags.x264_video_to_http = true;
 293                         break;
 294                 case OPTION_RECORD_X264_VIDEO:
 295                         global_flags.x264_video_to_disk = true;
 296                         global_flags.x264_video_to_http = true;
 297                         break;
 298                 case OPTION_X264_PRESET:
 299                         global_flags.x264_preset = optarg;
 300                         break;
 301                 case OPTION_X264_TUNE:
 302                         global_flags.x264_tune = optarg;
 303                         break;
 304                 case OPTION_X264_SPEEDCONTROL:
 305                         global_flags.x264_speedcontrol = true;
 306                         break;
 307                 case OPTION_X264_SPEEDCONTROL_VERBOSE:
 308                         global_flags.x264_speedcontrol_verbose = true;
 309                         break;
 310                 case OPTION_X264_BITRATE:
 311                         global_flags.x264_bitrate = atoi(optarg);
 312                         break;
 313                 case OPTION_X264_CRF:
 314                         global_flags.x264_crf = atof(optarg);
 315                         break;
 316                 case OPTION_X264_VBV_BUFSIZE:
 317                         global_flags.x264_vbv_buffer_size = atoi(optarg);
 318                         break;
 319                 case OPTION_X264_VBV_MAX_BITRATE:
 320                         global_flags.x264_vbv_max_bitrate = atoi(optarg);
 321                         break;
 322                 case OPTION_X264_PARAM:
 323                         global_flags.x264_extra_param.push_back(optarg);
 324                         break;
 325                 case OPTION_FLAT_AUDIO:
 326                         // If --flat-audio is given, turn off everything that messes with the sound,
 327                         // except the final makeup gain.
 328                         global_flags.locut_enabled = false;
 329                         global_flags.gain_staging_auto = false;
 330                         global_flags.compressor_enabled = false;
 331                         global_flags.limiter_enabled = false;
 332                         break;
 333                 case OPTION_GAIN_STAGING:
 334                         global_flags.initial_gain_staging_db = atof(optarg);
 335                         global_flags.gain_staging_auto = false;
 336                         break;
 337                 case OPTION_DISABLE_LOCUT:
 338                         global_flags.locut_enabled = false;
 339                         break;
 340                 case OPTION_ENABLE_LOCUT:
 341                         global_flags.locut_enabled = true;
 342                         break;
 343                 case OPTION_DISABLE_GAIN_STAGING_AUTO:
 344                         global_flags.gain_staging_auto = false;
 345                         break;
 346                 case OPTION_ENABLE_GAIN_STAGING_AUTO:
 347                         global_flags.gain_staging_auto = true;
 348                         break;
 349                 case OPTION_DISABLE_COMPRESSOR:
 350                         global_flags.compressor_enabled = false;
 351                         break;
 352                 case OPTION_ENABLE_COMPRESSOR:
 353                         global_flags.compressor_enabled = true;
 354                         break;
 355                 case OPTION_DISABLE_LIMITER:
 356                         global_flags.limiter_enabled = false;
 357                         break;
 358                 case OPTION_ENABLE_LIMITER:
 359                         global_flags.limiter_enabled = true;
 360                         break;
 361                 case OPTION_DISABLE_MAKEUP_GAIN_AUTO:
 362                         global_flags.final_makeup_gain_auto = false;
 363                         break;
 364                 case OPTION_ENABLE_MAKEUP_GAIN_AUTO:
 365                         global_flags.final_makeup_gain_auto = true;
 366                         break;
 367                 case OPTION_DISABLE_ALSA_OUTPUT:
 368                         global_flags.enable_alsa_output = false;
 369                         break;
 370                 case OPTION_NO_FLUSH_PBOS:
 371                         global_flags.flush_pbos = false;
 372                         break;
 373                 case OPTION_PRINT_VIDEO_LATENCY:
 374                         global_flags.print_video_latency = true;
 375                         break;
 376                 case OPTION_MAX_INPUT_QUEUE_FRAMES:
 377                         global_flags.max_input_queue_frames = atoi(optarg);
 378                         break;
 379                 case OPTION_AUDIO_QUEUE_LENGTH_MS:
 380                         global_flags.audio_queue_length_ms = atof(optarg);
 381                         break;
 382                 case OPTION_OUTPUT_YCBCR_COEFFICIENTS:
 383                         output_ycbcr_coefficients = optarg;
 384                         break;
 385                 case OPTION_OUTPUT_BUFFER_FRAMES:
 386                         global_flags.output_buffer_frames = atof(optarg);
 387                         break;
 388                 case OPTION_OUTPUT_SLOP_FRAMES:
 389                         global_flags.output_slop_frames = atof(optarg);
 390                         break;
 391                 case OPTION_TIMECODE_STREAM:
 392                         global_flags.display_timecode_in_stream = true;
 393                         break;
 394                 case OPTION_TIMECODE_STDOUT:
 395                         global_flags.display_timecode_on_stdout = true;
 396                         break;
 397                 case OPTION_10_BIT_INPUT:
 398                         global_flags.ten_bit_input = true;
 399                         break;
 400                 case OPTION_10_BIT_OUTPUT:
 401                         global_flags.ten_bit_output = true;
 402                         global_flags.x264_video_to_disk = true;
 403                         global_flags.x264_video_to_http = true;
 404                         global_flags.x264_bit_depth = 10;
 405                         break;
 406                 case OPTION_INPUT_YCBCR_INTERPRETATION: {
 407                         char *ptr = strchr(optarg, ',');
 408                         if (ptr == nullptr) {
 409                                 fprintf(stderr, "ERROR: Invalid argument '%s' to --input-ycbcr-interpretation (needs a card and an interpretation, separated by comma)\n", optarg);
 410                                 exit(1);
 411                         }
 412                         *ptr = '\0';
 413                         const int card_num = atoi(optarg);
 414                         if (card_num < 0 || card_num >= MAX_VIDEO_CARDS) {
 415                                 fprintf(stderr, "ERROR: Invalid card number %d\n", card_num);
 416                                 exit(1);
 417                         }
 418
 419                         YCbCrInterpretation interpretation;
 420                         char *interpretation_str = ptr + 1;
 421                         ptr = strchr(interpretation_str, ',');
 422                         if (ptr != nullptr) {
 423                                 *ptr = '\0';
 424                                 const char *range = ptr + 1;
 425                                 if (strcmp(range, "full") == 0) {
 426                                         interpretation.full_range = true;
 427                                 } else if (strcmp(range, "limited") == 0) {
 428                                         interpretation.full_range = false;
 429                                 } else {
 430                                         fprintf(stderr, "ERROR: Invalid Y'CbCr range '%s' (must be “full” or “limited”)\n", range);
 431                                         exit(1);
 432                                 }
 433                         }
 434
 435                         if (strcmp(interpretation_str, "rec601") == 0) {
 436                                 interpretation.ycbcr_coefficients_auto = false;
 437                                 interpretation.ycbcr_coefficients = movit::YCBCR_REC_601;
 438                         } else if (strcmp(interpretation_str, "rec709") == 0) {
 439                                 interpretation.ycbcr_coefficients_auto = false;
 440                                 interpretation.ycbcr_coefficients = movit::YCBCR_REC_709;
 441                         } else if (strcmp(interpretation_str, "auto") == 0) {
 442                                 interpretation.ycbcr_coefficients_auto = true;
 443                                 if (interpretation.full_range) {
 444                                         fprintf(stderr, "ERROR: Cannot use “auto” Y'CbCr coefficients with full range\n");
 445                                         exit(1);
 446                                 }
 447                         } else {
 448                                 fprintf(stderr, "ERROR: Invalid Y'CbCr coefficients '%s' (must be “rec601”, “rec709” or “auto”)\n", interpretation_str);
 449                                 exit(1);
 450                         }
 451                         global_flags.ycbcr_interpretation[card_num] = interpretation;
 452                         break;
 453                 }
 454                 case OPTION_HELP:
 455                         usage(program);
 456                         exit(0);
 457                 default:
 458                         fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
 459                         fprintf(stderr, "\n");
 460                         usage(program);
 461                         exit(1);
 462                 }
 463         }
 464
 465         if (global_flags.uncompressed_video_to_http &&
 466             global_flags.x264_video_to_http) {
 467                 fprintf(stderr, "ERROR: --http-uncompressed-video and --http-x264-video are mutually incompatible\n");
 468                 exit(1);
 469         }
 470         if (global_flags.num_cards <= 0) {
 471                 fprintf(stderr, "ERROR: --num-cards must be at least 1\n");
 472                 exit(1);
 473         }
 474         if (global_flags.output_card < -1 ||
 475             global_flags.output_card >= global_flags.num_cards) {
 476                 fprintf(stderr, "ERROR: --output-card points to a nonexistant card\n");
 477                 exit(1);
 478         }
 479         if (global_flags.x264_speedcontrol) {
 480                 if (!global_flags.x264_preset.empty() && global_flags.x264_preset != "faster") {
 481                         fprintf(stderr, "WARNING: --x264-preset is overridden by --x264-speedcontrol (implicitly uses \"faster\" as base preset)\n");
 482                 }
 483                 global_flags.x264_preset = "faster";
 484         } else if (global_flags.x264_preset.empty()) {
 485                 global_flags.x264_preset = X264_DEFAULT_PRESET;
 486         }
 487         if (!theme_dirs.empty()) {
 488                 global_flags.theme_dirs = theme_dirs;
 489         }
 490
 491         // In reality, we could probably do with any even value (we subsample
 492         // by two in some places), but it's better to be on the safe side
 493         // wrt. video codecs and such. (I'd set 16 if I could, but 1080 isn't
 494         // divisible by 16.)
 495         if (global_flags.width <= 0 || (global_flags.width % 8) != 0 ||
 496             global_flags.height <= 0 || (global_flags.height % 8) != 0) {
 497                 fprintf(stderr, "ERROR: --width and --height must be positive integers divisible by 8\n");
 498                 exit(1);
 499         }
 500
 501         for (pair<int, int> mapping : global_flags.default_stream_mapping) {
 502                 if (mapping.second >= global_flags.num_cards) {
 503                         fprintf(stderr, "ERROR: Signal %d mapped to card %d, which doesn't exist (try adjusting --num-cards)\n",
 504                                 mapping.first, mapping.second);
 505                         exit(1);
 506                 }
 507         }
 508
 509         // Rec. 709 would be the sane thing to do, but it seems many players
 510         // just default to BT.601 coefficients no matter what. We _do_ set
 511         // the right flags, so that a player that works properly doesn't have
 512         // to guess, but it's frequently ignored. See discussions
 513         // in e.g. https://trac.ffmpeg.org/ticket/4978; the situation with
 514         // browsers is complicated and depends on things like hardware acceleration
 515         // (https://bugs.chromium.org/p/chromium/issues/detail?id=333619 for
 516         // extensive discussion). VLC generally fixed this as part of 3.0.0
 517         // (see e.g. https://github.com/videolan/vlc/commit/bc71288b2e38c07d6921472824b92eef1aa85f7e
 518         // and https://github.com/videolan/vlc/commit/c3fc2683a9cde1d42674ebf9935dced05733a215),
 519         // but earlier versions were pretty random.
 520         //
 521         // On the other hand, HDMI/SDI output typically requires Rec. 709 for
 522         // HD resolutions (with no way of signaling anything else), which is
 523         // a conflicting demand. In this case, we typically let the HDMI/SDI
 524         // output win if it is active, but the user can override this.
 525         if (output_ycbcr_coefficients == "auto") {
 526                 // Essentially: BT.709 if HDMI/SDI output is on, otherwise BT.601.
 527                 global_flags.ycbcr_rec709_coefficients = false;
 528                 global_flags.ycbcr_auto_coefficients = true;
 529         } else if (output_ycbcr_coefficients == "rec709") {
 530                 global_flags.ycbcr_rec709_coefficients = true;
 531                 global_flags.ycbcr_auto_coefficients = false;
 532         } else if (output_ycbcr_coefficients == "rec601") {
 533                 global_flags.ycbcr_rec709_coefficients = false;
 534                 global_flags.ycbcr_auto_coefficients = false;
 535         } else {
 536                 fprintf(stderr, "ERROR: --output-ycbcr-coefficients must be “rec601”, “rec709” or “auto”\n");
 537                 exit(1);
 538         }
 539
 540         if (global_flags.output_buffer_frames < 0.0f) {
 541                 // Actually, even zero probably won't make sense; there is some internal
 542                 // delay to the card.
 543                 fprintf(stderr, "ERROR: --output-buffer-frames can't be negative.\n");
 544                 exit(1);
 545         }
 546         if (global_flags.output_slop_frames < 0.0f) {
 547                 fprintf(stderr, "ERROR: --output-slop-frames can't be negative.\n");
 548                 exit(1);
 549         }
 550         if (global_flags.max_input_queue_frames < 1) {
 551                 fprintf(stderr, "ERROR: --max-input-queue-frames must be at least 1.\n");
 552                 exit(1);
 553         }
 554         if (global_flags.max_input_queue_frames > 10) {
 555                 fprintf(stderr, "WARNING: --max-input-queue-frames has little effect over 10.\n");
 556         }
 557
 558         if (!isinf(global_flags.x264_crf)) {  // CRF mode is selected.
 559                 if (global_flags.x264_bitrate != -1) {
 560                         fprintf(stderr, "ERROR: --x264-bitrate and --x264-crf are mutually incompatible.\n");
 561                         exit(1);
 562                 }
 563                 if (global_flags.x264_vbv_max_bitrate != -1 && global_flags.x264_vbv_buffer_size != -1) {
 564                         fprintf(stderr, "WARNING: VBV settings are ignored with --x264-crf.\n");
 565                 }
 566         } else if (global_flags.x264_bitrate == -1) {
 567                 global_flags.x264_bitrate = DEFAULT_X264_OUTPUT_BIT_RATE;
 568         }
 569 }