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