src/lib/ffmpeg_content.cc

   1 /*
   2     Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19
  20 */
  21
  22 #include "audio_content.h"
  23 #include "compose.hpp"
  24 #include "config.h"
  25 #include "constants.h"
  26 #include "exceptions.h"
  27 #include "ffmpeg_audio_stream.h"
  28 #include "ffmpeg_content.h"
  29 #include "ffmpeg_examiner.h"
  30 #include "ffmpeg_subtitle_stream.h"
  31 #include "film.h"
  32 #include "filter.h"
  33 #include "frame_rate_change.h"
  34 #include "job.h"
  35 #include "log.h"
  36 #include "text_content.h"
  37 #include "video_content.h"
  38 #include <dcp/raw_convert.h>
  39 #include <libcxml/cxml.h>
  40 extern "C" {
  41 #include <libavformat/avformat.h>
  42 #include <libavutil/pixdesc.h>
  43 }
  44 #include <libxml++/libxml++.h>
  45 #include <iostream>
  46
  47 #include "i18n.h"
  48
  49
  50 using std::string;
  51 using std::vector;
  52 using std::list;
  53 using std::cout;
  54 using std::pair;
  55 using std::make_pair;
  56 using std::max;
  57 using std::make_shared;
  58 using std::shared_ptr;
  59 using std::dynamic_pointer_cast;
  60 using boost::optional;
  61 using dcp::raw_convert;
  62 using namespace dcpomatic;
  63
  64
  65 int const FFmpegContentProperty::SUBTITLE_STREAMS = 100;
  66 int const FFmpegContentProperty::SUBTITLE_STREAM = 101;
  67 int const FFmpegContentProperty::FILTERS = 102;
  68 int const FFmpegContentProperty::KDM = 103;
  69
  70
  71 FFmpegContent::FFmpegContent (boost::filesystem::path p)
  72         : Content (p)
  73 {
  74
  75 }
  76
  77
  78 template <class T>
  79 optional<T>
  80 get_optional_enum (cxml::ConstNodePtr node, string name)
  81 {
  82         auto const v = node->optional_number_child<int>(name);
  83         if (!v) {
  84                 return optional<T>();
  85         }
  86         return static_cast<T>(*v);
  87 }
  88
  89
  90 FFmpegContent::FFmpegContent (cxml::ConstNodePtr node, int version, list<string>& notes)
  91         : Content (node)
  92 {
  93         _color_range = get_optional_enum<AVColorRange>(node, "ColorRange");
  94
  95         VideoRange const video_range_hint = (_color_range && *_color_range == AVCOL_RANGE_JPEG) ? VideoRange::FULL : VideoRange::VIDEO;
  96
  97         video = VideoContent::from_xml (this, node, version, video_range_hint);
  98         audio = AudioContent::from_xml (this, node, version);
  99         text = TextContent::from_xml (this, node, version, notes);
 100
 101         for (auto i: node->node_children("SubtitleStream")) {
 102                 _subtitle_streams.push_back (make_shared<FFmpegSubtitleStream>(i, version));
 103                 if (i->optional_number_child<int>("Selected")) {
 104                         _subtitle_stream = _subtitle_streams.back ();
 105                 }
 106         }
 107
 108         for (auto i: node->node_children("AudioStream")) {
 109                 auto as = make_shared<FFmpegAudioStream>(i, version);
 110                 audio->add_stream (as);
 111                 if (version < 11 && !i->optional_node_child ("Selected")) {
 112                         /* This is an old file and this stream is not selected, so un-map it */
 113                         as->set_mapping (AudioMapping (as->channels (), MAX_DCP_AUDIO_CHANNELS));
 114                 }
 115         }
 116
 117         for (auto i: node->node_children("Filter")) {
 118                 if (auto filter = Filter::from_id(i->content())) {
 119                         _filters.push_back(*filter);
 120                 } else {
 121                         notes.push_back (String::compose (_("DCP-o-matic no longer supports the `%1' filter, so it has been turned off."), i->content()));
 122                 }
 123         }
 124
 125         auto const f = node->optional_number_child<ContentTime::Type> ("FirstVideo");
 126         if (f) {
 127                 _first_video = ContentTime (f.get ());
 128         }
 129
 130         _color_primaries = get_optional_enum<AVColorPrimaries>(node, "ColorPrimaries");
 131         _color_trc = get_optional_enum<AVColorTransferCharacteristic>(node, "ColorTransferCharacteristic");
 132         _colorspace = get_optional_enum<AVColorSpace>(node, "Colorspace");
 133         _bits_per_pixel = node->optional_number_child<int> ("BitsPerPixel");
 134 }
 135
 136
 137 FFmpegContent::FFmpegContent (vector<shared_ptr<Content>> c)
 138         : Content (c)
 139 {
 140         auto i = c.begin ();
 141
 142         bool need_video = false;
 143         bool need_audio = false;
 144         bool need_text = false;
 145
 146         if (i != c.end ()) {
 147                 need_video = static_cast<bool> ((*i)->video);
 148                 need_audio = static_cast<bool> ((*i)->audio);
 149                 need_text = !(*i)->text.empty();
 150         }
 151
 152         while (i != c.end ()) {
 153                 if (need_video != static_cast<bool> ((*i)->video)) {
 154                         throw JoinError (_("Content to be joined must all have or not have video"));
 155                 }
 156                 if (need_audio != static_cast<bool> ((*i)->audio)) {
 157                         throw JoinError (_("Content to be joined must all have or not have audio"));
 158                 }
 159                 if (need_text != !(*i)->text.empty()) {
 160                         throw JoinError (_("Content to be joined must all have or not have subtitles or captions"));
 161                 }
 162                 ++i;
 163         }
 164
 165         if (need_video) {
 166                 video = make_shared<VideoContent>(this, c);
 167         }
 168         if (need_audio) {
 169                 audio = make_shared<AudioContent>(this, c);
 170         }
 171         if (need_text) {
 172                 text.push_back (make_shared<TextContent>(this, c));
 173         }
 174
 175         auto ref = dynamic_pointer_cast<FFmpegContent> (c[0]);
 176         DCPOMATIC_ASSERT (ref);
 177
 178         for (size_t i = 0; i < c.size(); ++i) {
 179                 auto fc = dynamic_pointer_cast<FFmpegContent>(c[i]);
 180                 if (fc->only_text() && fc->only_text()->use() && *(fc->_subtitle_stream.get()) != *(ref->_subtitle_stream.get())) {
 181                         throw JoinError (_("Content to be joined must use the same subtitle stream."));
 182                 }
 183         }
 184
 185         /* XXX: should probably check that more of the stuff below is the same in *this and ref */
 186
 187         _subtitle_streams = ref->subtitle_streams ();
 188         _subtitle_stream = ref->subtitle_stream ();
 189         _first_video = ref->_first_video;
 190         _filters = ref->_filters;
 191         _color_range = ref->_color_range;
 192         _color_primaries = ref->_color_primaries;
 193         _color_trc = ref->_color_trc;
 194         _colorspace = ref->_colorspace;
 195         _bits_per_pixel = ref->_bits_per_pixel;
 196 }
 197
 198
 199 void
 200 FFmpegContent::as_xml (xmlpp::Node* node, bool with_paths) const
 201 {
 202         node->add_child("Type")->add_child_text("FFmpeg");
 203         Content::as_xml (node, with_paths);
 204
 205         if (video) {
 206                 video->as_xml (node);
 207         }
 208
 209         if (audio) {
 210                 audio->as_xml (node);
 211
 212                 for (auto i: audio->streams()) {
 213                         auto f = dynamic_pointer_cast<FFmpegAudioStream> (i);
 214                         DCPOMATIC_ASSERT (f);
 215                         f->as_xml (node->add_child("AudioStream"));
 216                 }
 217         }
 218
 219         if (only_text()) {
 220                 only_text()->as_xml (node);
 221         }
 222
 223         boost::mutex::scoped_lock lm (_mutex);
 224
 225         for (auto i: _subtitle_streams) {
 226                 auto t = node->add_child("SubtitleStream");
 227                 if (_subtitle_stream && i == _subtitle_stream) {
 228                         t->add_child("Selected")->add_child_text("1");
 229                 }
 230                 i->as_xml (t);
 231         }
 232
 233         for (auto i: _filters) {
 234                 node->add_child("Filter")->add_child_text(i.id());
 235         }
 236
 237         if (_first_video) {
 238                 node->add_child("FirstVideo")->add_child_text(raw_convert<string>(_first_video.get().get()));
 239         }
 240
 241         if (_color_range) {
 242                 node->add_child("ColorRange")->add_child_text(raw_convert<string>(static_cast<int>(*_color_range)));
 243         }
 244         if (_color_primaries) {
 245                 node->add_child("ColorPrimaries")->add_child_text(raw_convert<string>(static_cast<int>(*_color_primaries)));
 246         }
 247         if (_color_trc) {
 248                 node->add_child("ColorTransferCharacteristic")->add_child_text(raw_convert<string>(static_cast<int>(*_color_trc)));
 249         }
 250         if (_colorspace) {
 251                 node->add_child("Colorspace")->add_child_text(raw_convert<string>(static_cast<int>(*_colorspace)));
 252         }
 253         if (_bits_per_pixel) {
 254                 node->add_child("BitsPerPixel")->add_child_text(raw_convert<string>(*_bits_per_pixel));
 255         }
 256 }
 257
 258
 259 void
 260 FFmpegContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
 261 {
 262         ContentChangeSignaller cc1 (this, FFmpegContentProperty::SUBTITLE_STREAMS);
 263         ContentChangeSignaller cc2 (this, FFmpegContentProperty::SUBTITLE_STREAM);
 264
 265         if (job) {
 266                 job->set_progress_unknown ();
 267         }
 268
 269         Content::examine (film, job);
 270
 271         auto examiner = make_shared<FFmpegExaminer>(shared_from_this (), job);
 272
 273         if (examiner->has_video ()) {
 274                 video.reset (new VideoContent (this));
 275                 video->take_from_examiner(film, examiner);
 276         }
 277
 278         auto first_path = path (0);
 279
 280         {
 281                 boost::mutex::scoped_lock lm (_mutex);
 282
 283                 if (examiner->has_video ()) {
 284                         _first_video = examiner->first_video ();
 285                         _color_range = examiner->color_range ();
 286                         _color_primaries = examiner->color_primaries ();
 287                         _color_trc = examiner->color_trc ();
 288                         _colorspace = examiner->colorspace ();
 289                         _bits_per_pixel = examiner->bits_per_pixel ();
 290
 291                         if (examiner->rotation()) {
 292                                 auto rot = *examiner->rotation ();
 293                                 if (fabs (rot - 180) < 1.0) {
 294                                         _filters.push_back(*Filter::from_id("vflip"));
 295                                         _filters.push_back(*Filter::from_id("hflip"));
 296                                 } else if (fabs (rot - 90) < 1.0) {
 297                                         _filters.push_back(*Filter::from_id("90clock"));
 298                                 } else if (fabs (rot - 270) < 1.0) {
 299                                         _filters.push_back(*Filter::from_id("90anticlock"));
 300                                 }
 301                         }
 302                 }
 303
 304                 if (!examiner->audio_streams().empty()) {
 305                         audio = make_shared<AudioContent>(this);
 306
 307                         for (auto i: examiner->audio_streams()) {
 308                                 audio->add_stream (i);
 309                         }
 310
 311                         auto as = audio->streams().front();
 312                         auto m = as->mapping ();
 313                         m.make_default (film ? film->audio_processor() : 0, first_path);
 314                         as->set_mapping (m);
 315                 }
 316
 317                 _subtitle_streams = examiner->subtitle_streams ();
 318                 if (!_subtitle_streams.empty ()) {
 319                         text.clear ();
 320                         text.push_back (make_shared<TextContent>(this, TextType::OPEN_SUBTITLE, TextType::UNKNOWN));
 321                         _subtitle_stream = _subtitle_streams.front ();
 322                         text.front()->add_font(make_shared<dcpomatic::Font>(""));
 323                 }
 324         }
 325
 326         if (examiner->has_video ()) {
 327                 set_default_colour_conversion ();
 328         }
 329
 330         if (examiner->has_video() && examiner->pulldown() && video_frame_rate() && fabs(*video_frame_rate() - 29.97) < 0.001) {
 331                 /* FFmpeg has detected this file as 29.97 and the examiner thinks it is using "soft" 2:3 pulldown (telecine).
 332                  * This means we can treat it as a 23.976fps file.
 333                  */
 334                 set_video_frame_rate(film, 24000.0 / 1001);
 335                 video->set_length (video->length() * 24.0 / 30);
 336         }
 337 }
 338
 339
 340 string
 341 FFmpegContent::summary () const
 342 {
 343         if (video && audio) {
 344                 return String::compose (_("%1 [movie]"), path_summary());
 345         } else if (video) {
 346                 return String::compose (_("%1 [video]"), path_summary());
 347         } else if (audio) {
 348                 return String::compose (_("%1 [audio]"), path_summary());
 349         }
 350
 351         return path_summary ();
 352 }
 353
 354
 355 string
 356 FFmpegContent::technical_summary () const
 357 {
 358         string as = "";
 359         for (auto i: ffmpeg_audio_streams ()) {
 360                 as += i->technical_summary () + " " ;
 361         }
 362
 363         if (as.empty ()) {
 364                 as = "none";
 365         }
 366
 367         string ss = "none";
 368         if (_subtitle_stream) {
 369                 ss = _subtitle_stream->technical_summary ();
 370         }
 371
 372         auto filt = Filter::ffmpeg_string (_filters);
 373
 374         auto s = Content::technical_summary ();
 375
 376         if (video) {
 377                 s += " - " + video->technical_summary ();
 378         }
 379
 380         if (audio) {
 381                 s += " - " + audio->technical_summary ();
 382         }
 383
 384         return s + String::compose (
 385                 "ffmpeg: audio %1 subtitle %2 filters %3", as, ss, filt
 386                 );
 387 }
 388
 389
 390 void
 391 FFmpegContent::set_subtitle_stream (shared_ptr<FFmpegSubtitleStream> s)
 392 {
 393         ContentChangeSignaller cc (this, FFmpegContentProperty::SUBTITLE_STREAM);
 394
 395         {
 396                 boost::mutex::scoped_lock lm (_mutex);
 397                 _subtitle_stream = s;
 398         }
 399 }
 400
 401
 402 bool
 403 operator== (FFmpegStream const & a, FFmpegStream const & b)
 404 {
 405         return a._id == b._id;
 406 }
 407
 408
 409 bool
 410 operator!= (FFmpegStream const & a, FFmpegStream const & b)
 411 {
 412         return a._id != b._id;
 413 }
 414
 415
 416 DCPTime
 417 FFmpegContent::full_length (shared_ptr<const Film> film) const
 418 {
 419         FrameRateChange const frc (film, shared_from_this());
 420         if (video) {
 421                 return DCPTime::from_frames (llrint (video->length_after_3d_combine() * frc.factor()), film->video_frame_rate());
 422         }
 423
 424         if (audio) {
 425                 DCPTime longest;
 426                 for (auto i: audio->streams()) {
 427                         longest = max (longest, DCPTime::from_frames(llrint(i->length() / frc.speed_up), i->frame_rate()));
 428                 }
 429                 return longest;
 430         }
 431
 432         /* XXX: subtitle content? */
 433
 434         return {};
 435 }
 436
 437
 438 DCPTime
 439 FFmpegContent::approximate_length () const
 440 {
 441         if (video) {
 442                 return DCPTime::from_frames (video->length_after_3d_combine(), 24);
 443         }
 444
 445         DCPOMATIC_ASSERT (audio);
 446
 447         Frame longest = 0;
 448         for (auto i: audio->streams()) {
 449                 longest = max (longest, Frame(llrint(i->length())));
 450         }
 451
 452         return DCPTime::from_frames (longest, 24);
 453 }
 454
 455
 456 void
 457 FFmpegContent::set_filters(vector<Filter> const& filters)
 458 {
 459         ContentChangeSignaller cc (this, FFmpegContentProperty::FILTERS);
 460
 461         {
 462                 boost::mutex::scoped_lock lm (_mutex);
 463                 _filters = filters;
 464         }
 465 }
 466
 467
 468 string
 469 FFmpegContent::identifier () const
 470 {
 471         string s = Content::identifier();
 472
 473         if (video) {
 474                 s += "_" + video->identifier();
 475         }
 476
 477         if (only_text() && only_text()->use() && only_text()->burn()) {
 478                 s += "_" + only_text()->identifier();
 479         }
 480
 481         boost::mutex::scoped_lock lm (_mutex);
 482
 483         if (_subtitle_stream) {
 484                 s += "_" + _subtitle_stream->identifier ();
 485         }
 486
 487         for (auto i: _filters) {
 488                 s += "_" + i.id();
 489         }
 490
 491         return s;
 492 }
 493
 494
 495 void
 496 FFmpegContent::set_default_colour_conversion ()
 497 {
 498         DCPOMATIC_ASSERT (video);
 499
 500         auto const s = video->size ();
 501
 502         boost::mutex::scoped_lock lm (_mutex);
 503
 504         switch (_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)) {
 505         case AVCOL_SPC_RGB:
 506                 video->set_colour_conversion (PresetColourConversion::from_id ("srgb").conversion);
 507                 break;
 508         case AVCOL_SPC_BT709:
 509                 video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion);
 510                 break;
 511         case AVCOL_SPC_BT470BG:
 512         case AVCOL_SPC_SMPTE170M:
 513         case AVCOL_SPC_SMPTE240M:
 514                 video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion);
 515                 break;
 516         case AVCOL_SPC_BT2020_CL:
 517         case AVCOL_SPC_BT2020_NCL:
 518                 video->set_colour_conversion (PresetColourConversion::from_id ("rec2020").conversion);
 519                 break;
 520         default:
 521                 if (s.width < 1080) {
 522                         video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion);
 523                 } else {
 524                         video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion);
 525                 }
 526                 break;
 527         }
 528 }
 529
 530
 531 void
 532 FFmpegContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 533 {
 534         Content::add_properties (film, p);
 535
 536         if (video) {
 537                 video->add_properties (p);
 538
 539                 if (_bits_per_pixel) {
 540                         auto pixel_quanta_product = video->pixel_quanta().x * video->pixel_quanta().y;
 541                         auto bits_per_main_pixel = pixel_quanta_product * _bits_per_pixel.get() / (pixel_quanta_product + 2);
 542
 543                         int const lim_start = pow(2, bits_per_main_pixel - 4);
 544                         int const lim_end = 235 * pow(2, bits_per_main_pixel - 8);
 545                         int const total = pow(2, bits_per_main_pixel);
 546
 547                         switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) {
 548                         case AVCOL_RANGE_UNSPECIFIED:
 549                                 /// TRANSLATORS: this means that the range of pixel values used in this
 550                                 /// file is unknown (not specified in the file).
 551                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified")));
 552                                 break;
 553                         case AVCOL_RANGE_MPEG:
 554                                 /// TRANSLATORS: this means that the range of pixel values used in this
 555                                 /// file is limited, so that not all possible values are valid.
 556                                 p.push_back (
 557                                         UserProperty (
 558                                                 UserProperty::VIDEO, _("Colour range"), String::compose(_("Limited / video (%1-%2)"), lim_start, lim_end)
 559                                                 )
 560                                         );
 561                                 break;
 562                         case AVCOL_RANGE_JPEG:
 563                                 /// TRANSLATORS: this means that the range of pixel values used in this
 564                                 /// file is full, so that all possible pixel values are valid.
 565                                 p.push_back(UserProperty(UserProperty::VIDEO, _("Colour range"), String::compose(_("Full (0-%1)"), total - 1)));
 566                                 break;
 567                         default:
 568                                 DCPOMATIC_ASSERT (false);
 569                         }
 570                 } else {
 571                         switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) {
 572                         case AVCOL_RANGE_UNSPECIFIED:
 573                                 /// TRANSLATORS: this means that the range of pixel values used in this
 574                                 /// file is unknown (not specified in the file).
 575                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified")));
 576                                 break;
 577                         case AVCOL_RANGE_MPEG:
 578                                 /// TRANSLATORS: this means that the range of pixel values used in this
 579                                 /// file is limited, so that not all possible values are valid.
 580                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Limited")));
 581                                 break;
 582                         case AVCOL_RANGE_JPEG:
 583                                 /// TRANSLATORS: this means that the range of pixel values used in this
 584                                 /// file is full, so that all possible pixel values are valid.
 585                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Full")));
 586                                 break;
 587                         default:
 588                                 DCPOMATIC_ASSERT (false);
 589                         }
 590                 }
 591
 592                 char const * primaries[] = {
 593                         _("Unspecified"),
 594                         _("BT709"),
 595                         _("Unspecified"),
 596                         _("Unspecified"),
 597                         _("BT470M"),
 598                         _("BT470BG"),
 599                         _("SMPTE 170M (BT601)"),
 600                         _("SMPTE 240M"),
 601                         _("Film"),
 602                         _("BT2020"),
 603                         _("SMPTE ST 428-1 (CIE 1931 XYZ)"),
 604                         _("SMPTE ST 431-2 (2011)"),
 605                         _("SMPTE ST 432-1 D65 (2010)"), // 12
 606                         "", // 13
 607                         "", // 14
 608                         "", // 15
 609                         "", // 16
 610                         "", // 17
 611                         "", // 18
 612                         "", // 19
 613                         "", // 20
 614                         "", // 21
 615                         _("JEDEC P22")
 616                 };
 617
 618                 DCPOMATIC_ASSERT (AVCOL_PRI_NB <= 23);
 619                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour primaries"), primaries[_color_primaries.get_value_or(AVCOL_PRI_UNSPECIFIED)]));
 620
 621                 char const * transfers[] = {
 622                         _("Unspecified"),
 623                         _("BT709"),
 624                         _("Unspecified"),
 625                         _("Unspecified"),
 626                         _("Gamma 22 (BT470M)"),
 627                         _("Gamma 28 (BT470BG)"),
 628                         _("SMPTE 170M (BT601)"),
 629                         _("SMPTE 240M"),
 630                         _("Linear"),
 631                         _("Logarithmic (100:1 range)"),
 632                         _("Logarithmic (316:1 range)"),
 633                         _("IEC61966-2-4"),
 634                         _("BT1361 extended colour gamut"),
 635                         _("IEC61966-2-1 (sRGB or sYCC)"),
 636                         _("BT2020 for a 10-bit system"),
 637                         _("BT2020 for a 12-bit system"),
 638                         _("SMPTE ST 2084 for 10, 12, 14 and 16 bit systems"),
 639                         _("SMPTE ST 428-1"),
 640                         _("ARIB STD-B67 ('Hybrid log-gamma')")
 641                 };
 642
 643                 DCPOMATIC_ASSERT (AVCOL_TRC_NB <= 19);
 644                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour transfer characteristic"), transfers[_color_trc.get_value_or(AVCOL_TRC_UNSPECIFIED)]));
 645
 646                 char const * spaces[] = {
 647                         _("RGB / sRGB (IEC61966-2-1)"),
 648                         _("BT709"),
 649                         _("Unspecified"),
 650                         _("Unspecified"),
 651                         _("FCC"),
 652                         _("BT470BG (BT601-6)"),
 653                         _("SMPTE 170M (BT601-6)"),
 654                         _("SMPTE 240M"),
 655                         _("YCOCG"),
 656                         _("BT2020 non-constant luminance"),
 657                         _("BT2020 constant luminance"),
 658                         _("SMPTE 2085, Y'D'zD'x"),
 659                         _("Chroma-derived non-constant luminance"),
 660                         _("Chroma-derived constant luminance"),
 661                         _("BT2100")
 662                 };
 663
 664                 DCPOMATIC_ASSERT (AVCOL_SPC_NB == 15);
 665                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colourspace"), spaces[_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)]));
 666
 667                 if (_bits_per_pixel) {
 668                         p.push_back (UserProperty (UserProperty::VIDEO, _("Bits per pixel"), *_bits_per_pixel));
 669                 }
 670         }
 671
 672         if (audio) {
 673                 audio->add_properties (film, p);
 674         }
 675 }
 676
 677
 678 /** Our subtitle streams have colour maps, which can be changed, but
 679  *  they have no way of signalling that change.  As a hack, we have this
 680  *  method which callers can use when they've modified one of our subtitle
 681  *  streams.
 682  */
 683 void
 684 FFmpegContent::signal_subtitle_stream_changed ()
 685 {
 686         /* XXX: this is too late; really it should be before the change */
 687         ContentChangeSignaller cc (this, FFmpegContentProperty::SUBTITLE_STREAM);
 688 }
 689
 690
 691 vector<shared_ptr<FFmpegAudioStream>>
 692 FFmpegContent::ffmpeg_audio_streams () const
 693 {
 694         vector<shared_ptr<FFmpegAudioStream>> fa;
 695
 696         if (audio) {
 697                 for (auto i: audio->streams()) {
 698                         fa.push_back (dynamic_pointer_cast<FFmpegAudioStream>(i));
 699                 }
 700         }
 701
 702         return fa;
 703 }
 704
 705
 706 void
 707 FFmpegContent::take_settings_from (shared_ptr<const Content> c)
 708 {
 709         auto fc = dynamic_pointer_cast<const FFmpegContent> (c);
 710         if (!fc) {
 711                 return;
 712                 }
 713
 714         Content::take_settings_from (c);
 715         _filters = fc->_filters;
 716 }
 717