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