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 "variant.h"
  38 #include "video_content.h"
  39 #include <dcp/raw_convert.h>
  40 #include <libcxml/cxml.h>
  41 extern "C" {
  42 #include <libavformat/avformat.h>
  43 #include <libavutil/pixdesc.h>
  44 }
  45 #include <libxml++/libxml++.h>
  46 #include <iostream>
  47
  48 #include "i18n.h"
  49
  50
  51 using std::string;
  52 using std::vector;
  53 using std::list;
  54 using std::cout;
  55 using std::pair;
  56 using std::make_pair;
  57 using std::max;
  58 using std::make_shared;
  59 using std::shared_ptr;
  60 using std::dynamic_pointer_cast;
  61 using boost::optional;
  62 using dcp::raw_convert;
  63 using namespace dcpomatic;
  64
  65
  66 int const FFmpegContentProperty::SUBTITLE_STREAMS = 100;
  67 int const FFmpegContentProperty::SUBTITLE_STREAM = 101;
  68 int const FFmpegContentProperty::FILTERS = 102;
  69 int const FFmpegContentProperty::KDM = 103;
  70
  71
  72 FFmpegContent::FFmpegContent (boost::filesystem::path p)
  73         : Content (p)
  74 {
  75
  76 }
  77
  78
  79 template <class T>
  80 optional<T>
  81 get_optional_enum (cxml::ConstNodePtr node, string name)
  82 {
  83         auto const v = node->optional_number_child<int>(name);
  84         if (!v) {
  85                 return optional<T>();
  86         }
  87         return static_cast<T>(*v);
  88 }
  89
  90
  91 FFmpegContent::FFmpegContent (cxml::ConstNodePtr node, int version, list<string>& notes)
  92         : Content (node)
  93 {
  94         _color_range = get_optional_enum<AVColorRange>(node, "ColorRange");
  95
  96         VideoRange const video_range_hint = (_color_range && *_color_range == AVCOL_RANGE_JPEG) ? VideoRange::FULL : VideoRange::VIDEO;
  97
  98         video = VideoContent::from_xml (this, node, version, video_range_hint);
  99         audio = AudioContent::from_xml (this, node, version);
 100         text = TextContent::from_xml (this, node, version, notes);
 101
 102         for (auto i: node->node_children("SubtitleStream")) {
 103                 _subtitle_streams.push_back (make_shared<FFmpegSubtitleStream>(i, version));
 104                 if (i->optional_number_child<int>("Selected")) {
 105                         _subtitle_stream = _subtitle_streams.back ();
 106                 }
 107         }
 108
 109         for (auto i: node->node_children("AudioStream")) {
 110                 auto as = make_shared<FFmpegAudioStream>(i, version);
 111                 audio->add_stream (as);
 112                 if (version < 11 && !i->optional_node_child ("Selected")) {
 113                         /* This is an old file and this stream is not selected, so un-map it */
 114                         as->set_mapping (AudioMapping (as->channels (), MAX_DCP_AUDIO_CHANNELS));
 115                 }
 116         }
 117
 118         for (auto i: node->node_children("Filter")) {
 119                 if (auto filter = Filter::from_id(i->content())) {
 120                         _filters.push_back(*filter);
 121                 } else {
 122                         notes.push_back(String::compose(_("%1 no longer supports the `%2' filter, so it has been turned off."), variant::dcpomatic(), i->content()));
 123                 }
 124         }
 125
 126         auto const f = node->optional_number_child<ContentTime::Type> ("FirstVideo");
 127         if (f) {
 128                 _first_video = ContentTime (f.get ());
 129         }
 130
 131         _color_primaries = get_optional_enum<AVColorPrimaries>(node, "ColorPrimaries");
 132         _color_trc = get_optional_enum<AVColorTransferCharacteristic>(node, "ColorTransferCharacteristic");
 133         _colorspace = get_optional_enum<AVColorSpace>(node, "Colorspace");
 134         _bits_per_pixel = node->optional_number_child<int> ("BitsPerPixel");
 135 }
 136
 137
 138 FFmpegContent::FFmpegContent (vector<shared_ptr<Content>> c)
 139         : Content (c)
 140 {
 141         auto i = c.begin ();
 142
 143         bool need_video = false;
 144         bool need_audio = false;
 145         bool need_text = false;
 146
 147         if (i != c.end ()) {
 148                 need_video = static_cast<bool> ((*i)->video);
 149                 need_audio = static_cast<bool> ((*i)->audio);
 150                 need_text = !(*i)->text.empty();
 151         }
 152
 153         while (i != c.end ()) {
 154                 if (need_video != static_cast<bool> ((*i)->video)) {
 155                         throw JoinError (_("Content to be joined must all have or not have video"));
 156                 }
 157                 if (need_audio != static_cast<bool> ((*i)->audio)) {
 158                         throw JoinError (_("Content to be joined must all have or not have audio"));
 159                 }
 160                 if (need_text != !(*i)->text.empty()) {
 161                         throw JoinError (_("Content to be joined must all have or not have subtitles or captions"));
 162                 }
 163                 ++i;
 164         }
 165
 166         if (need_video) {
 167                 video = make_shared<VideoContent>(this, c);
 168         }
 169         if (need_audio) {
 170                 audio = make_shared<AudioContent>(this, c);
 171         }
 172         if (need_text) {
 173                 text.push_back (make_shared<TextContent>(this, c));
 174         }
 175
 176         auto ref = dynamic_pointer_cast<FFmpegContent> (c[0]);
 177         DCPOMATIC_ASSERT (ref);
 178
 179         for (size_t i = 0; i < c.size(); ++i) {
 180                 auto fc = dynamic_pointer_cast<FFmpegContent>(c[i]);
 181                 if (fc->only_text() && fc->only_text()->use() && *(fc->_subtitle_stream.get()) != *(ref->_subtitle_stream.get())) {
 182                         throw JoinError (_("Content to be joined must use the same subtitle stream."));
 183                 }
 184         }
 185
 186         /* XXX: should probably check that more of the stuff below is the same in *this and ref */
 187
 188         _subtitle_streams = ref->subtitle_streams ();
 189         _subtitle_stream = ref->subtitle_stream ();
 190         _first_video = ref->_first_video;
 191         _filters = ref->_filters;
 192         _color_range = ref->_color_range;
 193         _color_primaries = ref->_color_primaries;
 194         _color_trc = ref->_color_trc;
 195         _colorspace = ref->_colorspace;
 196         _bits_per_pixel = ref->_bits_per_pixel;
 197 }
 198
 199
 200 void
 201 FFmpegContent::as_xml(xmlpp::Element* element, bool with_paths) const
 202 {
 203         cxml::add_text_child(element, "Type", "FFmpeg");
 204         Content::as_xml(element, with_paths);
 205
 206         if (video) {
 207                 video->as_xml(element);
 208         }
 209
 210         if (audio) {
 211                 audio->as_xml(element);
 212
 213                 for (auto i: audio->streams()) {
 214                         auto f = dynamic_pointer_cast<FFmpegAudioStream> (i);
 215                         DCPOMATIC_ASSERT (f);
 216                         f->as_xml(cxml::add_child(element, "AudioStream"));
 217                 }
 218         }
 219
 220         if (only_text()) {
 221                 only_text()->as_xml(element);
 222         }
 223
 224         boost::mutex::scoped_lock lm (_mutex);
 225
 226         for (auto i: _subtitle_streams) {
 227                 auto t = cxml::add_child(element, "SubtitleStream");
 228                 if (_subtitle_stream && i == _subtitle_stream) {
 229                         cxml::add_text_child(t, "Selected", "1");
 230                 }
 231                 i->as_xml (t);
 232         }
 233
 234         for (auto i: _filters) {
 235                 cxml::add_text_child(element, "Filter", i.id());
 236         }
 237
 238         if (_first_video) {
 239                 cxml::add_text_child(element, "FirstVideo", raw_convert<string>(_first_video.get().get()));
 240         }
 241
 242         if (_color_range) {
 243                 cxml::add_text_child(element, "ColorRange", raw_convert<string>(static_cast<int>(*_color_range)));
 244         }
 245         if (_color_primaries) {
 246                 cxml::add_text_child(element, "ColorPrimaries", raw_convert<string>(static_cast<int>(*_color_primaries)));
 247         }
 248         if (_color_trc) {
 249                 cxml::add_text_child(element, "ColorTransferCharacteristic", raw_convert<string>(static_cast<int>(*_color_trc)));
 250         }
 251         if (_colorspace) {
 252                 cxml::add_text_child(element, "Colorspace", raw_convert<string>(static_cast<int>(*_colorspace)));
 253         }
 254         if (_bits_per_pixel) {
 255                 cxml::add_text_child(element, "BitsPerPixel", raw_convert<string>(*_bits_per_pixel));
 256         }
 257 }
 258
 259
 260 void
 261 FFmpegContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
 262 {
 263         ContentChangeSignaller cc1 (this, FFmpegContentProperty::SUBTITLE_STREAMS);
 264         ContentChangeSignaller cc2 (this, FFmpegContentProperty::SUBTITLE_STREAM);
 265
 266         if (job) {
 267                 job->set_progress_unknown ();
 268         }
 269
 270         Content::examine (film, job);
 271
 272         auto examiner = make_shared<FFmpegExaminer>(shared_from_this (), job);
 273
 274         if (examiner->has_video ()) {
 275                 video.reset (new VideoContent (this));
 276                 video->take_from_examiner(film, examiner);
 277         }
 278
 279         auto first_path = path (0);
 280
 281         {
 282                 boost::mutex::scoped_lock lm (_mutex);
 283
 284                 if (examiner->has_video ()) {
 285                         _first_video = examiner->first_video ();
 286                         _color_range = examiner->color_range ();
 287                         _color_primaries = examiner->color_primaries ();
 288                         _color_trc = examiner->color_trc ();
 289                         _colorspace = examiner->colorspace ();
 290                         _bits_per_pixel = examiner->bits_per_pixel ();
 291
 292                         if (examiner->rotation()) {
 293                                 auto rot = *examiner->rotation ();
 294                                 if (fabs (rot - 180) < 1.0) {
 295                                         _filters.push_back(*Filter::from_id("vflip"));
 296                                         _filters.push_back(*Filter::from_id("hflip"));
 297                                 } else if (fabs (rot - 90) < 1.0) {
 298                                         _filters.push_back(*Filter::from_id("90clock"));
 299                                         video->rotate_size();
 300                                 } else if (fabs (rot - 270) < 1.0) {
 301                                         _filters.push_back(*Filter::from_id("90anticlock"));
 302                                         video->rotate_size();
 303                                 }
 304                         }
 305                         if (examiner->has_alpha()) {
 306                                 _filters.push_back(*Filter::from_id("premultiply"));
 307                         }
 308                 }
 309
 310                 if (!examiner->audio_streams().empty()) {
 311                         audio = make_shared<AudioContent>(this);
 312
 313                         for (auto i: examiner->audio_streams()) {
 314                                 audio->add_stream (i);
 315                         }
 316
 317                         auto as = audio->streams().front();
 318                         auto m = as->mapping ();
 319                         m.make_default (film ? film->audio_processor() : 0, first_path);
 320                         as->set_mapping (m);
 321                 }
 322
 323                 _subtitle_streams = examiner->subtitle_streams ();
 324                 if (!_subtitle_streams.empty ()) {
 325                         text.clear ();
 326                         text.push_back (make_shared<TextContent>(this, TextType::OPEN_SUBTITLE, TextType::UNKNOWN));
 327                         _subtitle_stream = _subtitle_streams.front ();
 328                         text.front()->add_font(make_shared<dcpomatic::Font>(""));
 329                 }
 330         }
 331
 332         if (examiner->has_video ()) {
 333                 set_default_colour_conversion ();
 334         }
 335
 336         if (examiner->has_video() && examiner->pulldown() && video_frame_rate() && fabs(*video_frame_rate() - 29.97) < 0.001) {
 337                 /* FFmpeg has detected this file as 29.97 and the examiner thinks it is using "soft" 2:3 pulldown (telecine).
 338                  * This means we can treat it as a 23.976fps file.
 339                  */
 340                 set_video_frame_rate(film, 24000.0 / 1001);
 341                 video->set_length (video->length() * 24.0 / 30);
 342         }
 343 }
 344
 345
 346 string
 347 FFmpegContent::summary () const
 348 {
 349         if (video && audio) {
 350                 return String::compose (_("%1 [movie]"), path_summary());
 351         } else if (video) {
 352                 return String::compose (_("%1 [video]"), path_summary());
 353         } else if (audio) {
 354                 return String::compose (_("%1 [audio]"), path_summary());
 355         }
 356
 357         return path_summary ();
 358 }
 359
 360
 361 string
 362 FFmpegContent::technical_summary () const
 363 {
 364         string as = "";
 365         for (auto i: ffmpeg_audio_streams ()) {
 366                 as += i->technical_summary () + " " ;
 367         }
 368
 369         if (as.empty ()) {
 370                 as = "none";
 371         }
 372
 373         string ss = "none";
 374         if (_subtitle_stream) {
 375                 ss = _subtitle_stream->technical_summary ();
 376         }
 377
 378         auto filt = Filter::ffmpeg_string (_filters);
 379
 380         auto s = Content::technical_summary ();
 381
 382         if (video) {
 383                 s += " - " + video->technical_summary ();
 384         }
 385
 386         if (audio) {
 387                 s += " - " + audio->technical_summary ();
 388         }
 389
 390         return s + String::compose (
 391                 "ffmpeg: audio %1 subtitle %2 filters %3", as, ss, filt
 392                 );
 393 }
 394
 395
 396 void
 397 FFmpegContent::set_subtitle_stream (shared_ptr<FFmpegSubtitleStream> s)
 398 {
 399         ContentChangeSignaller cc (this, FFmpegContentProperty::SUBTITLE_STREAM);
 400
 401         {
 402                 boost::mutex::scoped_lock lm (_mutex);
 403                 _subtitle_stream = s;
 404         }
 405 }
 406
 407
 408 bool
 409 operator== (FFmpegStream const & a, FFmpegStream const & b)
 410 {
 411         return a._id == b._id;
 412 }
 413
 414
 415 bool
 416 operator!= (FFmpegStream const & a, FFmpegStream const & b)
 417 {
 418         return a._id != b._id;
 419 }
 420
 421
 422 DCPTime
 423 FFmpegContent::full_length (shared_ptr<const Film> film) const
 424 {
 425         FrameRateChange const frc (film, shared_from_this());
 426         if (video) {
 427                 return DCPTime::from_frames (llrint (video->length_after_3d_combine() * frc.factor()), film->video_frame_rate());
 428         }
 429
 430         if (audio) {
 431                 DCPTime longest;
 432                 for (auto i: audio->streams()) {
 433                         longest = max (longest, DCPTime::from_frames(llrint(i->length() / frc.speed_up), i->frame_rate()));
 434                 }
 435                 return longest;
 436         }
 437
 438         /* XXX: subtitle content? */
 439
 440         return {};
 441 }
 442
 443
 444 DCPTime
 445 FFmpegContent::approximate_length () const
 446 {
 447         if (video) {
 448                 return DCPTime::from_frames (video->length_after_3d_combine(), 24);
 449         }
 450
 451         DCPOMATIC_ASSERT (audio);
 452
 453         Frame longest = 0;
 454         for (auto i: audio->streams()) {
 455                 longest = max (longest, Frame(llrint(i->length())));
 456         }
 457
 458         return DCPTime::from_frames (longest, 24);
 459 }
 460
 461
 462 void
 463 FFmpegContent::set_filters(vector<Filter> const& filters)
 464 {
 465         ContentChangeSignaller cc (this, FFmpegContentProperty::FILTERS);
 466
 467         {
 468                 boost::mutex::scoped_lock lm (_mutex);
 469                 _filters = filters;
 470         }
 471 }
 472
 473
 474 string
 475 FFmpegContent::identifier () const
 476 {
 477         string s = Content::identifier();
 478
 479         if (video) {
 480                 s += "_" + video->identifier();
 481         }
 482
 483         if (only_text() && only_text()->use() && only_text()->burn()) {
 484                 s += "_" + only_text()->identifier();
 485         }
 486
 487         boost::mutex::scoped_lock lm (_mutex);
 488
 489         if (_subtitle_stream) {
 490                 s += "_" + _subtitle_stream->identifier ();
 491         }
 492
 493         for (auto i: _filters) {
 494                 s += "_" + i.id();
 495         }
 496
 497         return s;
 498 }
 499
 500
 501 void
 502 FFmpegContent::set_default_colour_conversion ()
 503 {
 504         DCPOMATIC_ASSERT (video);
 505
 506         auto const s = video->size ();
 507
 508         boost::mutex::scoped_lock lm (_mutex);
 509
 510         switch (_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)) {
 511         case AVCOL_SPC_RGB:
 512                 video->set_colour_conversion (PresetColourConversion::from_id ("srgb").conversion);
 513                 break;
 514         case AVCOL_SPC_BT709:
 515                 video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion);
 516                 break;
 517         case AVCOL_SPC_BT470BG:
 518         case AVCOL_SPC_SMPTE170M:
 519         case AVCOL_SPC_SMPTE240M:
 520                 video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion);
 521                 break;
 522         case AVCOL_SPC_BT2020_CL:
 523         case AVCOL_SPC_BT2020_NCL:
 524                 video->set_colour_conversion (PresetColourConversion::from_id ("rec2020").conversion);
 525                 break;
 526         default:
 527                 if (s && s->width < 1080) {
 528                         video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion);
 529                 } else {
 530                         video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion);
 531                 }
 532                 break;
 533         }
 534 }
 535
 536
 537 void
 538 FFmpegContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 539 {
 540         Content::add_properties (film, p);
 541
 542         if (video) {
 543                 video->add_properties (p);
 544
 545                 if (_bits_per_pixel) {
 546                         auto pixel_quanta_product = video->pixel_quanta().x * video->pixel_quanta().y;
 547                         auto bits_per_main_pixel = pixel_quanta_product * _bits_per_pixel.get() / (pixel_quanta_product + 2);
 548
 549                         int const lim_start = pow(2, bits_per_main_pixel - 4);
 550                         int const lim_end = 235 * pow(2, bits_per_main_pixel - 8);
 551                         int const total = pow(2, bits_per_main_pixel);
 552
 553                         switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) {
 554                         case AVCOL_RANGE_UNSPECIFIED:
 555                                 /// TRANSLATORS: this means that the range of pixel values used in this
 556                                 /// file is unknown (not specified in the file).
 557                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified")));
 558                                 break;
 559                         case AVCOL_RANGE_MPEG:
 560                                 /// TRANSLATORS: this means that the range of pixel values used in this
 561                                 /// file is limited, so that not all possible values are valid.
 562                                 p.push_back (
 563                                         UserProperty (
 564                                                 UserProperty::VIDEO, _("Colour range"), String::compose(_("Limited / video (%1-%2)"), lim_start, lim_end)
 565                                                 )
 566                                         );
 567                                 break;
 568                         case AVCOL_RANGE_JPEG:
 569                                 /// TRANSLATORS: this means that the range of pixel values used in this
 570                                 /// file is full, so that all possible pixel values are valid.
 571                                 p.push_back(UserProperty(UserProperty::VIDEO, _("Colour range"), String::compose(_("Full (0-%1)"), total - 1)));
 572                                 break;
 573                         default:
 574                                 DCPOMATIC_ASSERT (false);
 575                         }
 576                 } else {
 577                         switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) {
 578                         case AVCOL_RANGE_UNSPECIFIED:
 579                                 /// TRANSLATORS: this means that the range of pixel values used in this
 580                                 /// file is unknown (not specified in the file).
 581                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified")));
 582                                 break;
 583                         case AVCOL_RANGE_MPEG:
 584                                 /// TRANSLATORS: this means that the range of pixel values used in this
 585                                 /// file is limited, so that not all possible values are valid.
 586                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Limited")));
 587                                 break;
 588                         case AVCOL_RANGE_JPEG:
 589                                 /// TRANSLATORS: this means that the range of pixel values used in this
 590                                 /// file is full, so that all possible pixel values are valid.
 591                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Full")));
 592                                 break;
 593                         default:
 594                                 DCPOMATIC_ASSERT (false);
 595                         }
 596                 }
 597
 598                 char const * primaries[] = {
 599                         _("Unspecified"),
 600                         _("BT709"),
 601                         _("Unspecified"),
 602                         _("Unspecified"),
 603                         _("BT470M"),
 604                         _("BT470BG"),
 605                         _("SMPTE 170M (BT601)"),
 606                         _("SMPTE 240M"),
 607                         _("Film"),
 608                         _("BT2020"),
 609                         _("SMPTE ST 428-1 (CIE 1931 XYZ)"),
 610                         _("SMPTE ST 431-2 (2011)"),
 611                         _("SMPTE ST 432-1 D65 (2010)"), // 12
 612                         "", // 13
 613                         "", // 14
 614                         "", // 15
 615                         "", // 16
 616                         "", // 17
 617                         "", // 18
 618                         "", // 19
 619                         "", // 20
 620                         "", // 21
 621                         _("JEDEC P22")
 622                 };
 623
 624                 DCPOMATIC_ASSERT (AVCOL_PRI_NB <= 23);
 625                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour primaries"), primaries[_color_primaries.get_value_or(AVCOL_PRI_UNSPECIFIED)]));
 626
 627                 char const * transfers[] = {
 628                         _("Unspecified"),
 629                         _("BT709"),
 630                         _("Unspecified"),
 631                         _("Unspecified"),
 632                         _("Gamma 22 (BT470M)"),
 633                         _("Gamma 28 (BT470BG)"),
 634                         _("SMPTE 170M (BT601)"),
 635                         _("SMPTE 240M"),
 636                         _("Linear"),
 637                         _("Logarithmic (100:1 range)"),
 638                         _("Logarithmic (316:1 range)"),
 639                         _("IEC61966-2-4"),
 640                         _("BT1361 extended colour gamut"),
 641                         _("IEC61966-2-1 (sRGB or sYCC)"),
 642                         _("BT2020 for a 10-bit system"),
 643                         _("BT2020 for a 12-bit system"),
 644                         _("SMPTE ST 2084 for 10, 12, 14 and 16 bit systems"),
 645                         _("SMPTE ST 428-1"),
 646                         _("ARIB STD-B67 ('Hybrid log-gamma')")
 647                 };
 648
 649                 DCPOMATIC_ASSERT (AVCOL_TRC_NB <= 19);
 650                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour transfer characteristic"), transfers[_color_trc.get_value_or(AVCOL_TRC_UNSPECIFIED)]));
 651
 652                 char const * spaces[] = {
 653                         _("RGB / sRGB (IEC61966-2-1)"),
 654                         _("BT709"),
 655                         _("Unspecified"),
 656                         _("Unspecified"),
 657                         _("FCC"),
 658                         _("BT470BG (BT601-6)"),
 659                         _("SMPTE 170M (BT601-6)"),
 660                         _("SMPTE 240M"),
 661                         _("YCOCG"),
 662                         _("BT2020 non-constant luminance"),
 663                         _("BT2020 constant luminance"),
 664                         _("SMPTE 2085, Y'D'zD'x"),
 665                         _("Chroma-derived non-constant luminance"),
 666                         _("Chroma-derived constant luminance"),
 667                         _("BT2100")
 668                 };
 669
 670                 DCPOMATIC_ASSERT (AVCOL_SPC_NB == 15);
 671                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colourspace"), spaces[_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)]));
 672
 673                 if (_bits_per_pixel) {
 674                         p.push_back (UserProperty (UserProperty::VIDEO, _("Bits per pixel"), *_bits_per_pixel));
 675                 }
 676         }
 677
 678         if (audio) {
 679                 audio->add_properties (film, p);
 680         }
 681 }
 682
 683
 684 /** Our subtitle streams have colour maps, which can be changed, but
 685  *  they have no way of signalling that change.  As a hack, we have this
 686  *  method which callers can use when they've modified one of our subtitle
 687  *  streams.
 688  */
 689 void
 690 FFmpegContent::signal_subtitle_stream_changed ()
 691 {
 692         /* XXX: this is too late; really it should be before the change */
 693         ContentChangeSignaller cc (this, FFmpegContentProperty::SUBTITLE_STREAM);
 694 }
 695
 696
 697 vector<shared_ptr<FFmpegAudioStream>>
 698 FFmpegContent::ffmpeg_audio_streams () const
 699 {
 700         vector<shared_ptr<FFmpegAudioStream>> fa;
 701
 702         if (audio) {
 703                 for (auto i: audio->streams()) {
 704                         fa.push_back (dynamic_pointer_cast<FFmpegAudioStream>(i));
 705                 }
 706         }
 707
 708         return fa;
 709 }
 710
 711
 712 void
 713 FFmpegContent::take_settings_from (shared_ptr<const Content> c)
 714 {
 715         auto fc = dynamic_pointer_cast<const FFmpegContent> (c);
 716         if (!fc) {
 717                 return;
 718                 }
 719
 720         Content::take_settings_from (c);
 721         _filters = fc->_filters;
 722 }
 723