]> git.sesse.net Git - nageru/blob - nageru/flags.cpp
Support sending a separate x264 encode to disk.
[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_MAX_NUM_CARDS,
19         OPTION_MULTICHANNEL,
20         OPTION_MIDI_MAPPING,
21         OPTION_DEFAULT_HDMI_INPUT,
22         OPTION_FAKE_CARDS_AUDIO,
23         OPTION_V4L_OUTPUT,
24         OPTION_HTTP_UNCOMPRESSED_VIDEO,
25         OPTION_HTTP_X264_VIDEO,
26         OPTION_RECORD_X264_VIDEO,
27         OPTION_SEPARATE_X264_DISK_ENCODE,
28         OPTION_X264_PRESET,
29         OPTION_X264_TUNE,
30         OPTION_X264_SPEEDCONTROL,
31         OPTION_X264_SPEEDCONTROL_VERBOSE,
32         OPTION_X264_BITRATE,
33         OPTION_X264_CRF,
34         OPTION_X264_VBV_BUFSIZE,
35         OPTION_X264_VBV_MAX_BITRATE,
36         OPTION_X264_PARAM,
37         OPTION_X264_SEPARATE_DISK_PRESET,
38         OPTION_X264_SEPARATE_DISK_TUNE,
39         OPTION_X264_SEPARATE_DISK_BITRATE,
40         OPTION_X264_SEPARATE_DISK_CRF,
41         OPTION_X264_SEPARATE_DISK_PARAM,
42         OPTION_HTTP_MUX,
43         OPTION_HTTP_COARSE_TIMEBASE,
44         OPTION_HTTP_AUDIO_CODEC,
45         OPTION_HTTP_AUDIO_BITRATE,
46         OPTION_HTTP_PORT,
47         OPTION_SRT_PORT,
48         OPTION_NO_SRT,
49         OPTION_NO_TRANSCODE_VIDEO,
50         OPTION_NO_TRANSCODE_AUDIO,
51         OPTION_DISABLE_AUDIO,
52         OPTION_FLAT_AUDIO,
53         OPTION_GAIN_STAGING,
54         OPTION_DISABLE_LOCUT,
55         OPTION_ENABLE_LOCUT,
56         OPTION_DISABLE_GAIN_STAGING_AUTO,
57         OPTION_ENABLE_GAIN_STAGING_AUTO,
58         OPTION_DISABLE_COMPRESSOR,
59         OPTION_ENABLE_COMPRESSOR,
60         OPTION_DISABLE_LIMITER,
61         OPTION_ENABLE_LIMITER,
62         OPTION_DISABLE_MAKEUP_GAIN_AUTO,
63         OPTION_ENABLE_MAKEUP_GAIN_AUTO,
64         OPTION_DISABLE_ALSA_OUTPUT,
65         OPTION_NO_FLUSH_PBOS,
66         OPTION_PRINT_VIDEO_LATENCY,
67         OPTION_MAX_INPUT_QUEUE_FRAMES,
68         OPTION_AUDIO_QUEUE_LENGTH_MS,
69         OPTION_OUTPUT_YCBCR_COEFFICIENTS,
70         OPTION_OUTPUT_BUFFER_FRAMES,
71         OPTION_OUTPUT_SLOP_FRAMES,
72         OPTION_TIMECODE_STREAM,
73         OPTION_TIMECODE_STDOUT,
74         OPTION_QUICK_CUT_KEYS,
75         OPTION_10_BIT_INPUT,
76         OPTION_10_BIT_OUTPUT,
77         OPTION_INPUT_YCBCR_INTERPRETATION,
78         OPTION_MJPEG_EXPORT_CARDS,
79 };
80
81 map<unsigned, unsigned> parse_mjpeg_export_cards(char *optarg)
82 {
83         map<unsigned, unsigned> ret;
84         if (optarg[0] == '\0') {
85                 return ret;
86         }
87
88         unsigned stream_idx = 0;
89         char *start = optarg;
90         for ( ;; ) {
91                 char *end = strchr(start, ',');
92                 if (end != nullptr) {
93                         *end = '\0';
94                 }
95
96                 unsigned range_begin, range_end;
97                 if (sscanf(start, "%u-%u", &range_begin, &range_end) != 2) {
98                         range_begin = range_end = atoi(start);
99                 }
100                 if (range_end < range_begin) {
101                         fprintf(stderr, "ERROR: Invalid range %u-%u in --mjpeg-export-cards=\n", range_begin, range_end);
102                         exit(1);
103                 }
104                 if (range_end >= unsigned(global_flags.max_num_cards)) {
105                         // There are situations where we could possibly want to
106                         // include FFmpeg inputs (CEF inputs are unlikely),
107                         // but they're not necessarily in 4:2:2 Y'CbCr, so it would
108                         // require more functionality the the JPEG encoder.
109                         fprintf(stderr, "ERROR: Asked for (zero-indexed) card %u in --mjpeg-export-cards=, but there are only %u cards\n",
110                                 range_end, global_flags.max_num_cards);
111                         exit(1);
112                 }
113                 for (unsigned card_idx = range_begin; card_idx <= range_end; ++card_idx) {
114                         if (ret.count(card_idx)) {
115                                 fprintf(stderr, "ERROR: Card %u was given twice in --mjpeg-export-cards=\n", card_idx);
116                                 exit(1);
117                         }
118                         ret[card_idx] = stream_idx++;
119                 }
120                 if (end == nullptr) {
121                         break;
122                 } else {
123                         start = end + 1;
124                 }
125         }
126         return ret;
127 }
128
129 void usage(Program program)
130 {
131         if (program == PROGRAM_KAERU) {
132                 fprintf(stderr, "Usage: kaeru [OPTION]... SOURCE_URL\n");
133         } else {
134                 fprintf(stderr, "Usage: nageru [OPTION]...\n");
135         }
136         fprintf(stderr, "\n");
137         fprintf(stderr, "      --help                      print usage information\n");
138         if (program == PROGRAM_NAGERU) {
139                 fprintf(stderr, "      --fullscreen                run in full screen, with no decorations\n");
140         }
141         fprintf(stderr, "  -w, --width                     output width in pixels (default 1280)\n");
142         fprintf(stderr, "  -h, --height                    output height in pixels (default 720)\n");
143         if (program == PROGRAM_NAGERU) {
144                 fprintf(stderr, "  -c, --num-cards                 set minimum number of input cards (default 2)\n");
145                 fprintf(stderr, "      --max-num-cards             set maximum number of input cards (default %d)\n", MAX_VIDEO_CARDS);
146                 fprintf(stderr, "  -o, --output-card=CARD          also output signal to the given card (default none)\n");
147                 fprintf(stderr, "  -t, --theme=FILE                choose theme (default theme.lua)\n");
148                 fprintf(stderr, "  -I, --theme-dir=DIR             search for theme in this directory (can be given multiple times)\n");
149                 fprintf(stderr, "  -r, --recording-dir=DIR         where to store disk recording\n");
150                 fprintf(stderr, "  -v, --va-display=SPEC           VA-API device for H.264 encoding\n");
151                 fprintf(stderr, "                                    ($DISPLAY spec or /dev/dri/render* path)\n");
152                 fprintf(stderr, "  -m, --map-signal=SIGNAL,CARD    set a default card mapping (can be given multiple times)\n");
153                 fprintf(stderr, "  -M, --input-mapping=FILE        start with the given audio input mapping (implies --multichannel)\n");
154                 fprintf(stderr, "      --multichannel              start in multichannel audio mapping mode\n");
155                 fprintf(stderr, "      --midi-mapping=FILE         start with the given MIDI controller mapping (implies --multichannel)\n");
156                 fprintf(stderr, "      --default-hdmi-input        default to HDMI over SDI inputs for cards that have both\n");
157                 fprintf(stderr, "      --fake-cards-audio          make fake (disconnected) cards output a simple tone\n");
158                 fprintf(stderr, "      --v4l-output DEVICE         send video (no audio) to V4L2 output/loopback\n");
159                 fprintf(stderr, "      --http-uncompressed-video   send uncompressed NV12 video to HTTP clients\n");
160                 fprintf(stderr, "      --http-x264-video           send x264-compressed video to HTTP clients\n");
161                 fprintf(stderr, "      --record-x264-video         store x264-compressed video to disk (implies --http-x264-video,\n");
162                 fprintf(stderr, "                                    removes the need for working VA-API encoding)\n");
163                 fprintf(stderr, "      --separate-x264-disk-encode run a different x264 encoder for disk recording\n");
164                 fprintf(stderr, "                                    (implies --record-x264-video)\n");
165         }
166         fprintf(stderr, "      --x264-preset               x264 quality preset (default " X264_DEFAULT_PRESET ")\n");
167         fprintf(stderr, "      --x264-tune                 x264 tuning (default " X264_DEFAULT_TUNE ", can be blank)\n");
168         fprintf(stderr, "      --x264-speedcontrol         try to match x264 preset to available CPU speed\n");
169         fprintf(stderr, "      --x264-speedcontrol-verbose  output speedcontrol debugging statistics\n");
170         fprintf(stderr, "      --x264-bitrate              x264 bitrate (in kilobit/sec, default %d)\n",
171                 DEFAULT_X264_OUTPUT_BIT_RATE);
172         fprintf(stderr, "      --x264-crf=VALUE            quality-based VBR (-12 to 51), incompatible with --x264-bitrate and VBV\n");
173         fprintf(stderr, "      --x264-vbv-bufsize          x264 VBV size (in kilobits, 0 = one-frame VBV,\n");
174         fprintf(stderr, "                                  default: same as --x264-bitrate, that is, one-second VBV)\n");
175         fprintf(stderr, "      --x264-vbv-max-bitrate      x264 local max bitrate (in kilobit/sec per --vbv-bufsize,\n");
176         fprintf(stderr, "                                  0 = no limit, default: same as --x264-bitrate, i.e., CBR)\n");
177         fprintf(stderr, "      --x264-param=NAME[,VALUE]   set any x264 parameter, for fine tuning\n");
178         if (program == PROGRAM_NAGERU) {
179                 fprintf(stderr, "      --x264-separate-disk-preset x264 quality preset (default " X264_DEFAULT_PRESET ")\n");
180                 fprintf(stderr, "      --x264-separate-disk-tune   x264 tuning (default " X264_DEFAULT_TUNE ", can be blank)\n");
181                 fprintf(stderr, "      --x264-separate-disk-bitrate  x264 bitrate (in kilobit/sec, default %d)\n",
182                         DEFAULT_X264_OUTPUT_BIT_RATE);
183                 fprintf(stderr, "      --x264-separate-disk-crf=VALUE  quality-based VBR (-12 to 51), \n");
184                 fprintf(stderr, "                                  incompatible with --x264-separate-disk-bitrate\n");
185                 fprintf(stderr, "      --x264-separate-disk-param=NAME[,VALUE] set any x264 parameter, for fine tuning\n");
186         }
187         fprintf(stderr, "      --http-mux=NAME             mux to use for HTTP streams (default " DEFAULT_STREAM_MUX_NAME ")\n");
188         fprintf(stderr, "      --http-audio-codec=NAME     audio codec to use for HTTP streams\n");
189         fprintf(stderr, "                                  (default is to use the same as for the recording)\n");
190         fprintf(stderr, "      --http-audio-bitrate=KBITS  audio codec bit rate to use for HTTP streams\n");
191         fprintf(stderr, "                                  (default is %d, ignored unless --http-audio-codec is set)\n",
192                 DEFAULT_AUDIO_OUTPUT_BIT_RATE / 1000);
193         fprintf(stderr, "      --http-port=PORT            which port to use for the built-in HTTP server\n");
194         fprintf(stderr, "                                  (default is %d)\n", DEFAULT_HTTPD_PORT);
195         fprintf(stderr, "      --srt-port=PORT             which port to use for receiving SRT streams\n");
196         fprintf(stderr, "                                  (default is %d)\n", DEFAULT_SRT_PORT);
197         fprintf(stderr, "      --no-srt                    disable receiving SRT streams\n");
198         if (program == PROGRAM_KAERU) {
199                 fprintf(stderr, "      --no-transcode-video        copy encoded video raw from the source stream\n");
200                 fprintf(stderr, "                                    (experimental, must be H.264)\n");
201                 fprintf(stderr, "      --no-transcode-audio        copy encoded audio raw from the source stream\n");
202                 fprintf(stderr, "                                    (requires --http-audio-codec= to be set)\n");
203                 fprintf(stderr, "      --disable-audio             do not include any audio in the stream\n");
204         }
205         if (program == PROGRAM_NAGERU) {
206                 fprintf(stderr, "      --flat-audio                start with most audio processing turned off\n");
207                 fprintf(stderr, "                                    (can be overridden by e.g. --enable-limiter)\n");
208                 fprintf(stderr, "      --gain-staging=DB           set initial gain staging to the given value\n");
209                 fprintf(stderr, "                                    (--disable-gain-staging-auto)\n");
210                 fprintf(stderr, "      --disable-locut             turn off locut filter (also --enable)\n");
211                 fprintf(stderr, "      --disable-gain-staging-auto  turn off automatic gain staging (also --enable)\n");
212                 fprintf(stderr, "      --disable-compressor        turn off regular compressor (also --enable)\n");
213                 fprintf(stderr, "      --disable-limiter           turn off limiter (also --enable)\n");
214                 fprintf(stderr, "      --disable-makeup-gain-auto  turn off auto-adjustment of final makeup gain (also --enable)\n");
215                 fprintf(stderr, "      --disable-alsa-output       disable audio monitoring via ALSA\n");
216                 fprintf(stderr, "      --no-flush-pbos             do not explicitly signal texture data uploads\n");
217                 fprintf(stderr, "                                    (will give display corruption, but makes it\n");
218                 fprintf(stderr, "                                    possible to run with apitrace in real time)\n");
219                 fprintf(stderr, "      --print-video-latency       print out measurements of video latency on stdout\n");
220                 fprintf(stderr, "      --max-input-queue-frames=FRAMES  never keep more than FRAMES frames for each card\n");
221                 fprintf(stderr, "                                    (default 6, minimum 1)\n");
222                 fprintf(stderr, "      --audio-queue-length-ms=MS  length of audio resampling queue (default 100.0)\n");
223                 fprintf(stderr, "      --output-ycbcr-coefficients={rec601,rec709,auto}\n");
224                 fprintf(stderr, "                                  Y'CbCr coefficient standard of output (default auto)\n");
225                 fprintf(stderr, "                                    auto is rec601, unless --output-card is used\n");
226                 fprintf(stderr, "                                    and a Rec. 709 mode (typically HD modes) is in use\n");
227                 fprintf(stderr, "      --output-buffer-frames=NUM  number of frames in output buffer for --output-card,\n");
228                 fprintf(stderr, "                                    can be fractional (default 6.0); note also\n");
229                 fprintf(stderr, "                                    the audio queue can't be much longer than this\n");
230                 fprintf(stderr, "      --output-slop-frames=NUM    if more less than this number of frames behind for\n");
231                 fprintf(stderr, "                                    --output-card, try to submit anyway instead of\n");
232                 fprintf(stderr, "                                    dropping the frame (default 0.5)\n");
233                 fprintf(stderr, "      --timecode-stream           show timestamp and timecode in stream\n");
234                 fprintf(stderr, "      --timecode-stdout           show timestamp and timecode on standard output\n");
235                 fprintf(stderr, "      --quick-cut-keys            enable direct cutting by Q, W, E, ... keys\n");
236                 fprintf(stderr, "      --10-bit-input              use 10-bit video input (requires compute shaders)\n");
237                 fprintf(stderr, "      --10-bit-output             use 10-bit video output (requires compute shaders,\n");
238                 fprintf(stderr, "                                    implies --record-x264-video)\n");
239                 fprintf(stderr, "      --input-ycbcr-interpretation=CARD,{rec601,rec709,auto}[,{limited,full}]\n");
240                 fprintf(stderr, "                                  Y'CbCr coefficient standard of card CARD (default auto)\n");
241                 fprintf(stderr, "                                    auto is rec601 for SD, rec709 for HD, always limited\n");
242                 fprintf(stderr, "                                    limited means standard 0-240/0-235 input range (for 8-bit)\n");
243                 fprintf(stderr, "      --mjpeg-export-cards=RANGE[,RANGE...]\n");
244                 fprintf(stderr, "                                  export the given cards in MJPEG format to /multicam.mp4,\n");
245                 fprintf(stderr, "                                    in the given order (ranges can be either single card indexes\n");
246                 fprintf(stderr, "                                    or pairs like 1-3 for camera 1,2,3; default is all cards)\n");
247         }
248 }
249
250 void parse_flags(Program program, int argc, char * const argv[])
251 {
252         static const option long_options[] = {
253                 { "help", no_argument, 0, OPTION_HELP },
254                 { "fullscreen", no_argument, 0, OPTION_FULLSCREEN },
255                 { "width", required_argument, 0, 'w' },
256                 { "height", required_argument, 0, 'h' },
257                 { "num-cards", required_argument, 0, 'c' },
258                 { "max-num-cards", required_argument, 0, OPTION_MAX_NUM_CARDS },
259                 { "output-card", required_argument, 0, 'o' },
260                 { "theme", required_argument, 0, 't' },
261                 { "theme-dir", required_argument, 0, 'I' },
262                 { "recording-dir", required_argument, 0, 'r' },
263                 { "map-signal", required_argument, 0, 'm' },
264                 { "input-mapping", required_argument, 0, 'M' },
265                 { "va-display", required_argument, 0, 'v' },
266                 { "multichannel", no_argument, 0, OPTION_MULTICHANNEL },
267                 { "midi-mapping", required_argument, 0, OPTION_MIDI_MAPPING },
268                 { "default-hdmi-input", no_argument, 0, OPTION_DEFAULT_HDMI_INPUT },
269                 { "fake-cards-audio", no_argument, 0, OPTION_FAKE_CARDS_AUDIO },
270                 { "v4l-output", required_argument, 0, OPTION_V4L_OUTPUT },
271                 { "http-uncompressed-video", no_argument, 0, OPTION_HTTP_UNCOMPRESSED_VIDEO },
272                 { "http-x264-video", no_argument, 0, OPTION_HTTP_X264_VIDEO },
273                 { "record-x264-video", no_argument, 0, OPTION_RECORD_X264_VIDEO },
274                 { "separate-x264-disk-encode", no_argument, 0, OPTION_SEPARATE_X264_DISK_ENCODE },
275                 { "x264-preset", required_argument, 0, OPTION_X264_PRESET },
276                 { "x264-tune", required_argument, 0, OPTION_X264_TUNE },
277                 { "x264-speedcontrol", no_argument, 0, OPTION_X264_SPEEDCONTROL },
278                 { "x264-speedcontrol-verbose", no_argument, 0, OPTION_X264_SPEEDCONTROL_VERBOSE },
279                 { "x264-bitrate", required_argument, 0, OPTION_X264_BITRATE },
280                 { "x264-crf", required_argument, 0, OPTION_X264_CRF },
281                 { "x264-vbv-bufsize", required_argument, 0, OPTION_X264_VBV_BUFSIZE },
282                 { "x264-vbv-max-bitrate", required_argument, 0, OPTION_X264_VBV_MAX_BITRATE },
283                 { "x264-param", required_argument, 0, OPTION_X264_PARAM },
284                 { "x264-separate-disk-preset", required_argument, 0, OPTION_X264_SEPARATE_DISK_PRESET },
285                 { "x264-separate-disk-tune", required_argument, 0, OPTION_X264_SEPARATE_DISK_TUNE },
286                 { "x264-separate-disk-bitrate", required_argument, 0, OPTION_X264_SEPARATE_DISK_BITRATE },
287                 { "x264-separate-disk-crf", required_argument, 0, OPTION_X264_SEPARATE_DISK_CRF },
288                 { "x264-separate-disk-param", required_argument, 0, OPTION_X264_SEPARATE_DISK_PARAM },
289                 { "http-mux", required_argument, 0, OPTION_HTTP_MUX },
290                 { "http-audio-codec", required_argument, 0, OPTION_HTTP_AUDIO_CODEC },
291                 { "http-audio-bitrate", required_argument, 0, OPTION_HTTP_AUDIO_BITRATE },
292                 { "http-port", required_argument, 0, OPTION_HTTP_PORT },
293                 { "srt-port", required_argument, 0, OPTION_SRT_PORT },
294                 { "no-srt", no_argument, 0, OPTION_NO_SRT },
295                 { "no-transcode-video", no_argument, 0, OPTION_NO_TRANSCODE_VIDEO },
296                 { "no-transcode-audio", no_argument, 0, OPTION_NO_TRANSCODE_AUDIO },
297                 { "disable-audio", no_argument, 0, OPTION_DISABLE_AUDIO },
298                 { "flat-audio", no_argument, 0, OPTION_FLAT_AUDIO },
299                 { "gain-staging", required_argument, 0, OPTION_GAIN_STAGING },
300                 { "disable-locut", no_argument, 0, OPTION_DISABLE_LOCUT },
301                 { "enable-locut", no_argument, 0, OPTION_ENABLE_LOCUT },
302                 { "disable-gain-staging-auto", no_argument, 0, OPTION_DISABLE_GAIN_STAGING_AUTO },
303                 { "enable-gain-staging-auto", no_argument, 0, OPTION_ENABLE_GAIN_STAGING_AUTO },
304                 { "disable-compressor", no_argument, 0, OPTION_DISABLE_COMPRESSOR },
305                 { "enable-compressor", no_argument, 0, OPTION_ENABLE_COMPRESSOR },
306                 { "disable-limiter", no_argument, 0, OPTION_DISABLE_LIMITER },
307                 { "enable-limiter", no_argument, 0, OPTION_ENABLE_LIMITER },
308                 { "disable-makeup-gain-auto", no_argument, 0, OPTION_DISABLE_MAKEUP_GAIN_AUTO },
309                 { "enable-makeup-gain-auto", no_argument, 0, OPTION_ENABLE_MAKEUP_GAIN_AUTO },
310                 { "disable-alsa-output", no_argument, 0, OPTION_DISABLE_ALSA_OUTPUT },
311                 { "no-flush-pbos", no_argument, 0, OPTION_NO_FLUSH_PBOS },
312                 { "print-video-latency", no_argument, 0, OPTION_PRINT_VIDEO_LATENCY },
313                 { "max-input-queue-frames", required_argument, 0, OPTION_MAX_INPUT_QUEUE_FRAMES },
314                 { "audio-queue-length-ms", required_argument, 0, OPTION_AUDIO_QUEUE_LENGTH_MS },
315                 { "output-ycbcr-coefficients", required_argument, 0, OPTION_OUTPUT_YCBCR_COEFFICIENTS },
316                 { "output-buffer-frames", required_argument, 0, OPTION_OUTPUT_BUFFER_FRAMES },
317                 { "output-slop-frames", required_argument, 0, OPTION_OUTPUT_SLOP_FRAMES },
318                 { "timecode-stream", no_argument, 0, OPTION_TIMECODE_STREAM },
319                 { "timecode-stdout", no_argument, 0, OPTION_TIMECODE_STDOUT },
320                 { "quick-cut-keys", no_argument, 0, OPTION_QUICK_CUT_KEYS },
321                 { "10-bit-input", no_argument, 0, OPTION_10_BIT_INPUT },
322                 { "10-bit-output", no_argument, 0, OPTION_10_BIT_OUTPUT },
323                 { "input-ycbcr-interpretation", required_argument, 0, OPTION_INPUT_YCBCR_INTERPRETATION },
324                 { "mjpeg-export-cards", required_argument, 0, OPTION_MJPEG_EXPORT_CARDS },
325                 { 0, 0, 0, 0 }
326         };
327         vector<string> theme_dirs;
328         string output_ycbcr_coefficients = "auto";
329         bool card_to_mjpeg_stream_export_set = false;
330         for ( ;; ) {
331                 int option_index = 0;
332                 int c = getopt_long(argc, argv, "c:o:t:I:r:v:m:M:w:h:", long_options, &option_index);
333
334                 if (c == -1) {
335                         break;
336                 }
337                 switch (c) {
338                 case 'w':
339                         global_flags.width = atoi(optarg);
340                         break;
341                 case 'h':
342                         global_flags.height = atoi(optarg);
343                         break;
344                 case 'c':
345                         global_flags.min_num_cards = atoi(optarg);
346                         break;
347                 case OPTION_MAX_NUM_CARDS:
348                         global_flags.max_num_cards = atoi(optarg);
349                         break;
350                 case 'o':
351                         global_flags.output_card = atoi(optarg);
352                         break;
353                 case 't':
354                         global_flags.theme_filename = optarg;
355                         break;
356                 case 'I':
357                         theme_dirs.push_back(optarg);
358                         break;
359                 case 'r':
360                         global_flags.recording_dir = optarg;
361                         break;
362                 case 'm': {
363                         char *ptr = strchr(optarg, ',');
364                         if (ptr == nullptr) {
365                                 fprintf(stderr, "ERROR: Invalid argument '%s' to --map-signal (needs a signal and a card number, separated by comma)\n", optarg);
366                                 exit(1);
367                         }
368                         *ptr = '\0';
369                         const int signal_num = atoi(optarg);
370                         const int card_num = atoi(ptr + 1);
371                         if (global_flags.default_stream_mapping.count(signal_num)) {
372                                 fprintf(stderr, "ERROR: Signal %d already mapped to card %d\n",
373                                         signal_num, global_flags.default_stream_mapping[signal_num]);
374                                 exit(1);
375                         }
376                         global_flags.default_stream_mapping[signal_num] = card_num;
377                         break;
378                 }
379                 case 'M':
380                         global_flags.input_mapping_filename = optarg;
381                         break;
382                 case OPTION_MULTICHANNEL:
383                         global_flags.multichannel_mapping_mode = true;
384                         break;
385                 case 'v':
386                         global_flags.va_display = optarg;
387                         break;
388                 case OPTION_MIDI_MAPPING:
389                         global_flags.midi_mapping_filename = optarg;
390                         global_flags.multichannel_mapping_mode = true;
391                         break;
392                 case OPTION_DEFAULT_HDMI_INPUT:
393                         global_flags.default_hdmi_input = true;
394                         break;
395                 case OPTION_FAKE_CARDS_AUDIO:
396                         global_flags.fake_cards_audio = true;
397                         break;
398                 case OPTION_V4L_OUTPUT:
399                         global_flags.v4l_output_device = optarg;
400                         break;
401                 case OPTION_HTTP_UNCOMPRESSED_VIDEO:
402                         global_flags.uncompressed_video_to_http = true;
403                         break;
404                 case OPTION_HTTP_MUX:
405                         global_flags.stream_mux_name = optarg;
406                         break;
407                 case OPTION_HTTP_AUDIO_CODEC:
408                         global_flags.stream_audio_codec_name = optarg;
409                         break;
410                 case OPTION_HTTP_AUDIO_BITRATE:
411                         global_flags.stream_audio_codec_bitrate = atoi(optarg) * 1000;
412                         break;
413                 case OPTION_HTTP_PORT:
414                         global_flags.http_port = atoi(optarg);
415                         break;
416                 case OPTION_SRT_PORT:
417                         global_flags.srt_port = atoi(optarg);
418                         break;
419                 case OPTION_NO_SRT:
420                         global_flags.srt_port = -1;
421                         break;
422                 case OPTION_NO_TRANSCODE_VIDEO:
423                         global_flags.transcode_video = false;
424                         break;
425                 case OPTION_NO_TRANSCODE_AUDIO:
426                         global_flags.transcode_audio = false;
427                         break;
428                 case OPTION_DISABLE_AUDIO:
429                         global_flags.transcode_audio = false;
430                         global_flags.enable_audio = false;
431                         break;
432                 case OPTION_HTTP_X264_VIDEO:
433                         global_flags.x264_video_to_http = true;
434                         break;
435                 case OPTION_RECORD_X264_VIDEO:
436                         global_flags.x264_video_to_disk = true;
437                         global_flags.x264_video_to_http = true;
438                         break;
439                 case OPTION_SEPARATE_X264_DISK_ENCODE:
440                         global_flags.x264_video_to_disk = true;
441                         global_flags.x264_video_to_http = true;
442                         global_flags.x264_separate_disk_encode = true;
443                         break;
444                 case OPTION_X264_PRESET:
445                         global_flags.x264_preset = optarg;
446                         break;
447                 case OPTION_X264_TUNE:
448                         global_flags.x264_tune = optarg;
449                         break;
450                 case OPTION_X264_SPEEDCONTROL:
451                         global_flags.x264_speedcontrol = true;
452                         break;
453                 case OPTION_X264_SPEEDCONTROL_VERBOSE:
454                         global_flags.x264_speedcontrol_verbose = true;
455                         break;
456                 case OPTION_X264_BITRATE:
457                         global_flags.x264_bitrate = atoi(optarg);
458                         break;
459                 case OPTION_X264_CRF:
460                         global_flags.x264_crf = atof(optarg);
461                         break;
462                 case OPTION_X264_VBV_BUFSIZE:
463                         global_flags.x264_vbv_buffer_size = atoi(optarg);
464                         break;
465                 case OPTION_X264_VBV_MAX_BITRATE:
466                         global_flags.x264_vbv_max_bitrate = atoi(optarg);
467                         break;
468                 case OPTION_X264_PARAM:
469                         global_flags.x264_extra_param.push_back(optarg);
470                         break;
471                 case OPTION_X264_SEPARATE_DISK_PRESET:
472                         global_flags.x264_separate_disk_preset = optarg;
473                         break;
474                 case OPTION_X264_SEPARATE_DISK_TUNE:
475                         global_flags.x264_separate_disk_tune = optarg;
476                         break;
477                 case OPTION_X264_SEPARATE_DISK_BITRATE:
478                         global_flags.x264_separate_disk_bitrate = atoi(optarg);
479                         break;
480                 case OPTION_X264_SEPARATE_DISK_CRF:
481                         global_flags.x264_separate_disk_crf = atof(optarg);
482                         break;
483                 case OPTION_X264_SEPARATE_DISK_PARAM:
484                         global_flags.x264_separate_disk_extra_param.push_back(optarg);
485                         break;
486                 case OPTION_FLAT_AUDIO:
487                         // If --flat-audio is given, turn off everything that messes with the sound,
488                         // except the final makeup gain.
489                         global_flags.locut_enabled = false;
490                         global_flags.gain_staging_auto = false;
491                         global_flags.compressor_enabled = false;
492                         global_flags.limiter_enabled = false;
493                         break;
494                 case OPTION_GAIN_STAGING:
495                         global_flags.initial_gain_staging_db = atof(optarg);
496                         global_flags.gain_staging_auto = false;
497                         break;
498                 case OPTION_DISABLE_LOCUT:
499                         global_flags.locut_enabled = false;
500                         break;
501                 case OPTION_ENABLE_LOCUT:
502                         global_flags.locut_enabled = true;
503                         break;
504                 case OPTION_DISABLE_GAIN_STAGING_AUTO:
505                         global_flags.gain_staging_auto = false;
506                         break;
507                 case OPTION_ENABLE_GAIN_STAGING_AUTO:
508                         global_flags.gain_staging_auto = true;
509                         break;
510                 case OPTION_DISABLE_COMPRESSOR:
511                         global_flags.compressor_enabled = false;
512                         break;
513                 case OPTION_ENABLE_COMPRESSOR:
514                         global_flags.compressor_enabled = true;
515                         break;
516                 case OPTION_DISABLE_LIMITER:
517                         global_flags.limiter_enabled = false;
518                         break;
519                 case OPTION_ENABLE_LIMITER:
520                         global_flags.limiter_enabled = true;
521                         break;
522                 case OPTION_DISABLE_MAKEUP_GAIN_AUTO:
523                         global_flags.final_makeup_gain_auto = false;
524                         break;
525                 case OPTION_ENABLE_MAKEUP_GAIN_AUTO:
526                         global_flags.final_makeup_gain_auto = true;
527                         break;
528                 case OPTION_DISABLE_ALSA_OUTPUT:
529                         global_flags.enable_alsa_output = false;
530                         break;
531                 case OPTION_NO_FLUSH_PBOS:
532                         global_flags.flush_pbos = false;
533                         break;
534                 case OPTION_PRINT_VIDEO_LATENCY:
535                         global_flags.print_video_latency = true;
536                         break;
537                 case OPTION_MAX_INPUT_QUEUE_FRAMES:
538                         global_flags.max_input_queue_frames = atoi(optarg);
539                         break;
540                 case OPTION_AUDIO_QUEUE_LENGTH_MS:
541                         global_flags.audio_queue_length_ms = atof(optarg);
542                         break;
543                 case OPTION_OUTPUT_YCBCR_COEFFICIENTS:
544                         output_ycbcr_coefficients = optarg;
545                         break;
546                 case OPTION_OUTPUT_BUFFER_FRAMES:
547                         global_flags.output_buffer_frames = atof(optarg);
548                         break;
549                 case OPTION_OUTPUT_SLOP_FRAMES:
550                         global_flags.output_slop_frames = atof(optarg);
551                         break;
552                 case OPTION_TIMECODE_STREAM:
553                         global_flags.display_timecode_in_stream = true;
554                         break;
555                 case OPTION_TIMECODE_STDOUT:
556                         global_flags.display_timecode_on_stdout = true;
557                         break;
558                 case OPTION_QUICK_CUT_KEYS:
559                         global_flags.enable_quick_cut_keys = true;
560                         break;
561                 case OPTION_10_BIT_INPUT:
562                         global_flags.ten_bit_input = true;
563                         break;
564                 case OPTION_10_BIT_OUTPUT:
565                         global_flags.ten_bit_output = true;
566                         global_flags.x264_video_to_disk = true;
567                         global_flags.x264_video_to_http = true;
568                         global_flags.x264_bit_depth = 10;
569                         break;
570                 case OPTION_INPUT_YCBCR_INTERPRETATION: {
571                         char *ptr = strchr(optarg, ',');
572                         if (ptr == nullptr) {
573                                 fprintf(stderr, "ERROR: Invalid argument '%s' to --input-ycbcr-interpretation (needs a card and an interpretation, separated by comma)\n", optarg);
574                                 exit(1);
575                         }
576                         *ptr = '\0';
577                         const int card_num = atoi(optarg);
578                         if (card_num < 0 || card_num >= MAX_VIDEO_CARDS) {
579                                 fprintf(stderr, "ERROR: Invalid card number %d\n", card_num);
580                                 exit(1);
581                         }
582
583                         YCbCrInterpretation interpretation;
584                         char *interpretation_str = ptr + 1;
585                         ptr = strchr(interpretation_str, ',');
586                         if (ptr != nullptr) {
587                                 *ptr = '\0';
588                                 const char *range = ptr + 1;
589                                 if (strcmp(range, "full") == 0) {
590                                         interpretation.full_range = true;
591                                 } else if (strcmp(range, "limited") == 0) {
592                                         interpretation.full_range = false;
593                                 } else {
594                                         fprintf(stderr, "ERROR: Invalid Y'CbCr range '%s' (must be “full” or “limited”)\n", range);
595                                         exit(1);
596                                 }
597                         }
598
599                         if (strcmp(interpretation_str, "rec601") == 0) {
600                                 interpretation.ycbcr_coefficients_auto = false;
601                                 interpretation.ycbcr_coefficients = movit::YCBCR_REC_601;
602                         } else if (strcmp(interpretation_str, "rec709") == 0) {
603                                 interpretation.ycbcr_coefficients_auto = false;
604                                 interpretation.ycbcr_coefficients = movit::YCBCR_REC_709;
605                         } else if (strcmp(interpretation_str, "auto") == 0) {
606                                 interpretation.ycbcr_coefficients_auto = true;
607                                 if (interpretation.full_range) {
608                                         fprintf(stderr, "ERROR: Cannot use “auto” Y'CbCr coefficients with full range\n");
609                                         exit(1);
610                                 }
611                         } else {
612                                 fprintf(stderr, "ERROR: Invalid Y'CbCr coefficients '%s' (must be “rec601”, “rec709” or “auto”)\n", interpretation_str);
613                                 exit(1);
614                         }
615                         global_flags.ycbcr_interpretation[card_num] = interpretation;
616                         break;
617                 }
618                 case OPTION_FULLSCREEN:
619                         global_flags.fullscreen = true;
620                         break;
621                 case OPTION_MJPEG_EXPORT_CARDS: {
622                         if (card_to_mjpeg_stream_export_set) {
623                                 fprintf(stderr, "ERROR: --mjpeg-export-cards given twice\n");
624                                 exit(1);
625                         }
626                         global_flags.card_to_mjpeg_stream_export = parse_mjpeg_export_cards(optarg);    
627                         card_to_mjpeg_stream_export_set = true;
628                         break;
629                 }
630                 case OPTION_HELP:
631                         usage(program);
632                         exit(0);
633                 default:
634                         fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
635                         fprintf(stderr, "\n");
636                         usage(program);
637                         exit(1);
638                 }
639         }
640
641         if (global_flags.uncompressed_video_to_http &&
642             global_flags.x264_video_to_http) {
643                 fprintf(stderr, "ERROR: --http-uncompressed-video and --http-x264-video are mutually incompatible\n");
644                 exit(1);
645         }
646         if (global_flags.min_num_cards <= 0) {
647                 fprintf(stderr, "ERROR: --num-cards must be at least 1\n");
648                 exit(1);
649         }
650         if (global_flags.max_num_cards <= 0) {
651                 fprintf(stderr, "ERROR: --max-num-cards must be at least 1\n");
652                 exit(1);
653         }
654         if (global_flags.max_num_cards < global_flags.min_num_cards) {
655                 fprintf(stderr, "ERROR: --max-num-cards can not be lower than --num-cards\n");
656                 exit(1);
657         }
658         if (global_flags.output_card < -1 ||
659             global_flags.output_card >= global_flags.max_num_cards) {
660                 fprintf(stderr, "ERROR: --output-card points to a nonexistant card\n");
661                 exit(1);
662         }
663         if (global_flags.enable_audio && !global_flags.transcode_audio && global_flags.stream_audio_codec_name.empty()) {
664                 fprintf(stderr, "ERROR: If not transcoding audio, you must specify ahead-of-time what audio codec is in use\n");
665                 fprintf(stderr, "       (using --http-audio-codec).\n");
666                 exit(1);
667         }
668         if (global_flags.x264_speedcontrol) {
669                 if (!global_flags.x264_preset.empty() && global_flags.x264_preset != "faster") {
670                         fprintf(stderr, "WARNING: --x264-preset is overridden by --x264-speedcontrol (implicitly uses \"faster\" as base preset)\n");
671                 }
672                 global_flags.x264_preset = "faster";
673         } else if (global_flags.x264_preset.empty()) {
674                 global_flags.x264_preset = X264_DEFAULT_PRESET;
675         }
676         if (global_flags.x264_separate_disk_preset.empty()) {
677                 global_flags.x264_separate_disk_preset = X264_DEFAULT_PRESET;
678         }
679         if (!theme_dirs.empty()) {
680                 global_flags.theme_dirs = theme_dirs;
681         }
682
683         // In reality, we could probably do with any even value (we subsample
684         // by two in some places), but it's better to be on the safe side
685         // wrt. video codecs and such. (I'd set 16 if I could, but 1080 isn't
686         // divisible by 16.)
687         if (global_flags.width <= 0 || (global_flags.width % 8) != 0 ||
688             global_flags.height <= 0 || (global_flags.height % 8) != 0) {
689                 fprintf(stderr, "ERROR: --width and --height must be positive integers divisible by 8\n");
690                 exit(1);
691         }
692
693         for (pair<int, int> mapping : global_flags.default_stream_mapping) {
694                 if (mapping.second >= global_flags.max_num_cards) {
695                         fprintf(stderr, "ERROR: Signal %d mapped to card %d, which doesn't exist (try adjusting --max-num-cards)\n",
696                                 mapping.first, mapping.second);
697                         exit(1);
698                 }
699         }
700
701         // Rec. 709 would be the sane thing to do, but it seems many players
702         // just default to BT.601 coefficients no matter what. We _do_ set
703         // the right flags, so that a player that works properly doesn't have
704         // to guess, but it's frequently ignored. See discussions
705         // in e.g. https://trac.ffmpeg.org/ticket/4978; the situation with
706         // browsers is complicated and depends on things like hardware acceleration
707         // (https://bugs.chromium.org/p/chromium/issues/detail?id=333619 for
708         // extensive discussion). VLC generally fixed this as part of 3.0.0
709         // (see e.g. https://github.com/videolan/vlc/commit/bc71288b2e38c07d6921472824b92eef1aa85f7e
710         // and https://github.com/videolan/vlc/commit/c3fc2683a9cde1d42674ebf9935dced05733a215),
711         // but earlier versions were pretty random.
712         //
713         // On the other hand, HDMI/SDI output typically requires Rec. 709 for
714         // HD resolutions (with no way of signaling anything else), which is
715         // a conflicting demand. In this case, we typically let the HDMI/SDI
716         // output win if it is active, but the user can override this.
717         if (output_ycbcr_coefficients == "auto") {
718                 // Essentially: BT.709 if HDMI/SDI output is on, otherwise BT.601.
719                 global_flags.ycbcr_rec709_coefficients = false;
720                 global_flags.ycbcr_auto_coefficients = true;
721         } else if (output_ycbcr_coefficients == "rec709") {
722                 global_flags.ycbcr_rec709_coefficients = true;
723                 global_flags.ycbcr_auto_coefficients = false;
724         } else if (output_ycbcr_coefficients == "rec601") {
725                 global_flags.ycbcr_rec709_coefficients = false;
726                 global_flags.ycbcr_auto_coefficients = false;
727         } else {
728                 fprintf(stderr, "ERROR: --output-ycbcr-coefficients must be “rec601”, “rec709” or “auto”\n");
729                 exit(1);
730         }
731
732         if (global_flags.output_buffer_frames < 0.0f) {
733                 // Actually, even zero probably won't make sense; there is some internal
734                 // delay to the card.
735                 fprintf(stderr, "ERROR: --output-buffer-frames can't be negative.\n");
736                 exit(1);
737         }
738         if (global_flags.output_slop_frames < 0.0f) {
739                 fprintf(stderr, "ERROR: --output-slop-frames can't be negative.\n");
740                 exit(1);
741         }
742         if (global_flags.max_input_queue_frames < 1) {
743                 fprintf(stderr, "ERROR: --max-input-queue-frames must be at least 1.\n");
744                 exit(1);
745         }
746         if (global_flags.max_input_queue_frames > 10) {
747                 fprintf(stderr, "WARNING: --max-input-queue-frames has little effect over 10.\n");
748         }
749
750         if (!isinf(global_flags.x264_crf)) {  // CRF mode is selected.
751                 if (global_flags.x264_bitrate != -1) {
752                         fprintf(stderr, "ERROR: --x264-bitrate and --x264-crf are mutually incompatible.\n");
753                         exit(1);
754                 }
755                 if (global_flags.x264_vbv_max_bitrate != -1 && global_flags.x264_vbv_buffer_size != -1) {
756                         fprintf(stderr, "WARNING: VBV settings are ignored with --x264-crf.\n");
757                 }
758         } else if (global_flags.x264_bitrate == -1) {
759                 global_flags.x264_bitrate = DEFAULT_X264_OUTPUT_BIT_RATE;
760         }
761
762         if (!isinf(global_flags.x264_separate_disk_crf)) {  // CRF mode is selected.
763                 if (global_flags.x264_separate_disk_bitrate != -1) {
764                         fprintf(stderr, "ERROR: --x264-separate-disk-bitrate and --x264-separate-disk-crf are mutually incompatible.\n");
765                         exit(1);
766                 }
767         } else if (global_flags.x264_separate_disk_bitrate == -1) {
768                 global_flags.x264_separate_disk_bitrate = DEFAULT_X264_OUTPUT_BIT_RATE;
769         }
770
771         if (!card_to_mjpeg_stream_export_set) {
772                 // Fill in the default mapping (export all cards, in order).
773                 for (unsigned card_idx = 0; card_idx < unsigned(global_flags.max_num_cards); ++card_idx) {
774                         global_flags.card_to_mjpeg_stream_export[card_idx] = card_idx;
775                 }
776         }
777 }