src/lib/dcp_content.cc

   1 /*
   2     Copyright (C) 2014-2023 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 "atmos_content.h"
  23 #include "audio_content.h"
  24 #include "compose.hpp"
  25 #include "config.h"
  26 #include "dcp_content.h"
  27 #include "dcp_decoder.h"
  28 #include "dcp_examiner.h"
  29 #include "dcpomatic_log.h"
  30 #include "film.h"
  31 #include "job.h"
  32 #include "log.h"
  33 #include "overlaps.h"
  34 #include "scope_guard.h"
  35 #include "text_content.h"
  36 #include "video_content.h"
  37 #include <dcp/dcp.h>
  38 #include <dcp/raw_convert.h>
  39 #include <dcp/exceptions.h>
  40 #include <dcp/reel_closed_caption_asset.h>
  41 #include <dcp/reel_picture_asset.h>
  42 #include <dcp/reel_subtitle_asset.h>
  43 #include <dcp/reel.h>
  44 #include <libxml++/libxml++.h>
  45 #include <iterator>
  46 #include <iostream>
  47
  48 #include "i18n.h"
  49
  50
  51 using std::cout;
  52 using std::dynamic_pointer_cast;
  53 using std::function;
  54 using std::list;
  55 using std::make_shared;
  56 using std::shared_ptr;
  57 using std::string;
  58 using std::vector;
  59 using boost::optional;
  60 using boost::scoped_ptr;
  61 #if BOOST_VERSION >= 106100
  62 using namespace boost::placeholders;
  63 #endif
  64 using dcp::raw_convert;
  65 using namespace dcpomatic;
  66
  67
  68 int const DCPContentProperty::NEEDS_ASSETS       = 600;
  69 int const DCPContentProperty::NEEDS_KDM          = 601;
  70 int const DCPContentProperty::REFERENCE_VIDEO    = 602;
  71 int const DCPContentProperty::REFERENCE_AUDIO    = 603;
  72 int const DCPContentProperty::REFERENCE_TEXT     = 604;
  73 int const DCPContentProperty::NAME               = 605;
  74 int const DCPContentProperty::TEXTS              = 606;
  75 int const DCPContentProperty::CPL                = 607;
  76
  77
  78 DCPContent::DCPContent (boost::filesystem::path p)
  79         : _encrypted (false)
  80         , _needs_assets (false)
  81         , _kdm_valid (false)
  82         , _reference_video (false)
  83         , _reference_audio (false)
  84         , _three_d (false)
  85 {
  86         LOG_GENERAL ("Creating DCP content from %1", p.string());
  87
  88         read_directory (p);
  89         set_default_colour_conversion ();
  90 }
  91
  92 DCPContent::DCPContent (cxml::ConstNodePtr node, int version)
  93         : Content (node)
  94 {
  95         video = VideoContent::from_xml (this, node, version, VideoRange::FULL);
  96         audio = AudioContent::from_xml (this, node, version);
  97         list<string> notes;
  98         text = TextContent::from_xml (this, node, version, notes);
  99         atmos = AtmosContent::from_xml (this, node);
 100
 101         if (video && audio) {
 102                 audio->set_stream (
 103                         make_shared<AudioStream> (
 104                                 node->number_child<int> ("AudioFrameRate"),
 105                                 /* AudioLength was not present in some old metadata versions */
 106                                 node->optional_number_child<Frame>("AudioLength").get_value_or (
 107                                         video->length() * node->number_child<int>("AudioFrameRate") / video_frame_rate().get()
 108                                         ),
 109                                 AudioMapping(node->node_child("AudioMapping"), version),
 110                                 24
 111                                 )
 112                         );
 113         }
 114
 115         _name = node->string_child ("Name");
 116         _encrypted = node->bool_child ("Encrypted");
 117         _needs_assets = node->optional_bool_child("NeedsAssets").get_value_or (false);
 118         if (node->optional_node_child ("KDM")) {
 119                 _kdm = dcp::EncryptedKDM (node->string_child ("KDM"));
 120         }
 121         _kdm_valid = node->bool_child ("KDMValid");
 122         _reference_video = node->optional_bool_child ("ReferenceVideo").get_value_or (false);
 123         _reference_audio = node->optional_bool_child ("ReferenceAudio").get_value_or (false);
 124         if (version >= 37) {
 125                 _reference_text[TextType::OPEN_SUBTITLE] = node->optional_bool_child("ReferenceOpenSubtitle").get_value_or(false);
 126                 _reference_text[TextType::CLOSED_CAPTION] = node->optional_bool_child("ReferenceClosedCaption").get_value_or(false);
 127         } else {
 128                 _reference_text[TextType::OPEN_SUBTITLE] = node->optional_bool_child("ReferenceSubtitle").get_value_or(false);
 129                 _reference_text[TextType::CLOSED_CAPTION] = false;
 130         }
 131         if (node->optional_string_child("Standard")) {
 132                 auto const s = node->optional_string_child("Standard").get();
 133                 if (s == "Interop") {
 134                         _standard = dcp::Standard::INTEROP;
 135                 } else if (s == "SMPTE") {
 136                         _standard = dcp::Standard::SMPTE;
 137                 } else {
 138                         DCPOMATIC_ASSERT (false);
 139                 }
 140         }
 141         _three_d = node->optional_bool_child("ThreeD").get_value_or (false);
 142
 143         auto ck = node->optional_string_child("ContentKind");
 144         if (ck) {
 145                 _content_kind = dcp::ContentKind::from_name(*ck);
 146         }
 147         _cpl = node->optional_string_child("CPL");
 148         for (auto i: node->node_children("ReelLength")) {
 149                 _reel_lengths.push_back (raw_convert<int64_t> (i->content ()));
 150         }
 151
 152         for (auto i: node->node_children("Marker")) {
 153                 _markers[dcp::marker_from_string(i->string_attribute("type"))] = ContentTime(raw_convert<int64_t>(i->content()));
 154         }
 155
 156         for (auto i: node->node_children("Rating")) {
 157                 _ratings.push_back (dcp::Rating(i));
 158         }
 159
 160         for (auto i: node->node_children("ContentVersion")) {
 161                 _content_versions.push_back (i->content());
 162         }
 163 }
 164
 165 void
 166 DCPContent::read_directory (boost::filesystem::path p)
 167 {
 168         using namespace boost::filesystem;
 169
 170         bool have_assetmap = false;
 171         bool have_metadata = false;
 172
 173         for (auto i: directory_iterator(p)) {
 174                 if (i.path().filename() == "ASSETMAP" || i.path().filename() == "ASSETMAP.xml") {
 175                         have_assetmap = true;
 176                 } else if (i.path().filename() == "metadata.xml") {
 177                         have_metadata = true;
 178                 }
 179         }
 180
 181         if (!have_assetmap) {
 182                 if (!have_metadata) {
 183                         throw DCPError ("No ASSETMAP or ASSETMAP.xml file found: is this a DCP?");
 184                 } else {
 185                         throw ProjectFolderError ();
 186                 }
 187         }
 188
 189         read_sub_directory (p);
 190 }
 191
 192 void
 193 DCPContent::read_sub_directory (boost::filesystem::path p)
 194 {
 195         using namespace boost::filesystem;
 196
 197         LOG_GENERAL ("DCPContent::read_sub_directory reads %1", p.string());
 198         for (auto i: directory_iterator(p)) {
 199                 if (is_regular_file(i.path())) {
 200                         LOG_GENERAL ("Inside there's regular file %1", i.path().string());
 201                         add_path (i.path());
 202                 } else if (is_directory(i.path()) && i.path().filename() != ".AppleDouble") {
 203                         LOG_GENERAL ("Inside there's directory %1", i.path().string());
 204                         read_sub_directory (i.path());
 205                 } else {
 206                         LOG_GENERAL("Ignoring %1 from inside: status is %2", i.path().string(), static_cast<int>(status(i.path()).type()));
 207                 }
 208         }
 209 }
 210
 211 /** @param film Film, or 0 */
 212 void
 213 DCPContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
 214 {
 215         bool const needed_assets = needs_assets ();
 216         bool const needed_kdm = needs_kdm ();
 217         string const old_name = name ();
 218
 219         ContentChangeSignalDespatcher::instance()->suspend();
 220         ScopeGuard sg = []() {
 221                 ContentChangeSignalDespatcher::instance()->resume();
 222         };
 223
 224         ContentChangeSignaller cc_texts (this, DCPContentProperty::TEXTS);
 225         ContentChangeSignaller cc_assets (this, DCPContentProperty::NEEDS_ASSETS);
 226         ContentChangeSignaller cc_kdm (this, DCPContentProperty::NEEDS_KDM);
 227         ContentChangeSignaller cc_name (this, DCPContentProperty::NAME);
 228
 229         if (job) {
 230                 job->set_progress_unknown ();
 231         }
 232         Content::examine (film, job);
 233
 234         auto examiner = make_shared<DCPExaminer>(shared_from_this(), film ? film->tolerant() : true);
 235
 236         if (examiner->has_video()) {
 237                 {
 238                         boost::mutex::scoped_lock lm (_mutex);
 239                         video = make_shared<VideoContent>(this);
 240                 }
 241                 video->take_from_examiner(film, examiner);
 242                 set_default_colour_conversion ();
 243         }
 244
 245         if (examiner->has_audio()) {
 246                 {
 247                         boost::mutex::scoped_lock lm (_mutex);
 248                         audio = make_shared<AudioContent>(this);
 249                 }
 250                 auto as = make_shared<AudioStream>(examiner->audio_frame_rate(), examiner->audio_length(), examiner->audio_channels(), 24);
 251                 audio->set_stream (as);
 252                 auto m = as->mapping ();
 253                 m.make_default (film ? film->audio_processor() : 0);
 254                 as->set_mapping (m);
 255         }
 256
 257         if (examiner->has_atmos()) {
 258                 {
 259                         boost::mutex::scoped_lock lm (_mutex);
 260                         atmos = make_shared<AtmosContent>(this);
 261                 }
 262                 /* Setting length will cause calculations to be made based on edit rate, so that must
 263                  * be set up first otherwise hard-to-spot exceptions will be thrown.
 264                  */
 265                 atmos->set_edit_rate (examiner->atmos_edit_rate());
 266                 atmos->set_length (examiner->atmos_length());
 267         }
 268
 269         vector<shared_ptr<TextContent>> new_text;
 270
 271         for (int i = 0; i < examiner->text_count(TextType::OPEN_SUBTITLE); ++i) {
 272                 auto c = make_shared<TextContent>(this, TextType::OPEN_SUBTITLE, TextType::OPEN_SUBTITLE);
 273                 c->set_language (examiner->open_subtitle_language());
 274                 add_fonts_from_examiner(c, examiner->fonts());
 275                 new_text.push_back (c);
 276         }
 277
 278         for (int i = 0; i < examiner->text_count(TextType::CLOSED_CAPTION); ++i) {
 279                 auto c = make_shared<TextContent>(this, TextType::CLOSED_CAPTION, TextType::CLOSED_CAPTION);
 280                 c->set_dcp_track (examiner->dcp_text_track(i));
 281                 add_fonts_from_examiner(c, examiner->fonts());
 282                 new_text.push_back (c);
 283         }
 284
 285         {
 286                 boost::mutex::scoped_lock lm (_mutex);
 287                 text = new_text;
 288                 _name = examiner->name ();
 289                 _encrypted = examiner->encrypted ();
 290                 _needs_assets = examiner->needs_assets ();
 291                 _kdm_valid = examiner->kdm_valid ();
 292                 _standard = examiner->standard ();
 293                 _three_d = examiner->three_d ();
 294                 _content_kind = examiner->content_kind ();
 295                 _cpl = examiner->cpl ();
 296                 _reel_lengths = examiner->reel_lengths ();
 297                 for (auto const& i: examiner->markers()) {
 298                         _markers[i.first] = ContentTime(i.second.as_editable_units_ceil(DCPTime::HZ));
 299                 }
 300                 _ratings = examiner->ratings ();
 301                 _content_versions = examiner->content_versions ();
 302         }
 303
 304         if (needed_assets == needs_assets()) {
 305                 cc_assets.abort ();
 306         }
 307
 308         if (needed_kdm == needs_kdm()) {
 309                 cc_kdm.abort ();
 310         }
 311
 312         if (old_name == name()) {
 313                 cc_name.abort ();
 314         }
 315
 316         if (video) {
 317                 video->set_frame_type (_three_d ? VideoFrameType::THREE_D : VideoFrameType::TWO_D);
 318         }
 319 }
 320
 321 string
 322 DCPContent::summary () const
 323 {
 324         boost::mutex::scoped_lock lm (_mutex);
 325         return String::compose (_("%1 [DCP]"), _name);
 326 }
 327
 328 string
 329 DCPContent::technical_summary () const
 330 {
 331         string s = Content::technical_summary() + " - ";
 332         if (video) {
 333                 s += video->technical_summary() + " - ";
 334         }
 335         if (audio) {
 336                 s += audio->technical_summary() + " - ";
 337         }
 338         return s;
 339 }
 340
 341 void
 342 DCPContent::as_xml (xmlpp::Node* node, bool with_paths) const
 343 {
 344         node->add_child("Type")->add_child_text ("DCP");
 345
 346         Content::as_xml (node, with_paths);
 347
 348         if (video) {
 349                 video->as_xml (node);
 350         }
 351
 352         if (audio) {
 353                 audio->as_xml (node);
 354                 node->add_child("AudioFrameRate")->add_child_text (raw_convert<string> (audio->stream()->frame_rate()));
 355                 node->add_child("AudioLength")->add_child_text (raw_convert<string> (audio->stream()->length()));
 356                 audio->stream()->mapping().as_xml (node->add_child("AudioMapping"));
 357         }
 358
 359         for (auto i: text) {
 360                 i->as_xml (node);
 361         }
 362
 363         if (atmos) {
 364                 atmos->as_xml (node);
 365         }
 366
 367         boost::mutex::scoped_lock lm (_mutex);
 368         node->add_child("Name")->add_child_text (_name);
 369         node->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
 370         node->add_child("NeedsAssets")->add_child_text (_needs_assets ? "1" : "0");
 371         if (_kdm) {
 372                 node->add_child("KDM")->add_child_text (_kdm->as_xml ());
 373         }
 374         node->add_child("KDMValid")->add_child_text (_kdm_valid ? "1" : "0");
 375         node->add_child("ReferenceVideo")->add_child_text (_reference_video ? "1" : "0");
 376         node->add_child("ReferenceAudio")->add_child_text (_reference_audio ? "1" : "0");
 377         node->add_child("ReferenceOpenSubtitle")->add_child_text(_reference_text[TextType::OPEN_SUBTITLE] ? "1" : "0");
 378         node->add_child("ReferenceClosedCaption")->add_child_text(_reference_text[TextType::CLOSED_CAPTION] ? "1" : "0");
 379         if (_standard) {
 380                 switch (_standard.get ()) {
 381                 case dcp::Standard::INTEROP:
 382                         node->add_child("Standard")->add_child_text ("Interop");
 383                         break;
 384                 case dcp::Standard::SMPTE:
 385                         node->add_child("Standard")->add_child_text ("SMPTE");
 386                         break;
 387                 default:
 388                         DCPOMATIC_ASSERT (false);
 389                 }
 390         }
 391         node->add_child("ThreeD")->add_child_text (_three_d ? "1" : "0");
 392         if (_content_kind) {
 393                 node->add_child("ContentKind")->add_child_text(_content_kind->name());
 394         }
 395         if (_cpl) {
 396                 node->add_child("CPL")->add_child_text (_cpl.get ());
 397         }
 398         for (auto i: _reel_lengths) {
 399                 node->add_child("ReelLength")->add_child_text (raw_convert<string> (i));
 400         }
 401
 402         for (auto const& i: _markers) {
 403                 auto marker = node->add_child("Marker");
 404                 marker->set_attribute("type", dcp::marker_to_string(i.first));
 405                 marker->add_child_text(raw_convert<string>(i.second.get()));
 406         }
 407
 408         for (auto i: _ratings) {
 409                 auto rating = node->add_child("Rating");
 410                 i.as_xml (rating);
 411         }
 412
 413         for (auto i: _content_versions) {
 414                 node->add_child("ContentVersion")->add_child_text(i);
 415         }
 416 }
 417
 418 DCPTime
 419 DCPContent::full_length (shared_ptr<const Film> film) const
 420 {
 421         if (!video) {
 422                 return {};
 423         }
 424         FrameRateChange const frc (film, shared_from_this());
 425         return DCPTime::from_frames (llrint(video->length() * frc.factor()), film->video_frame_rate());
 426 }
 427
 428 DCPTime
 429 DCPContent::approximate_length () const
 430 {
 431         if (!video) {
 432                 return {};
 433         }
 434         return DCPTime::from_frames (video->length(), 24);
 435 }
 436
 437 string
 438 DCPContent::identifier () const
 439 {
 440         string s = Content::identifier() + "_";
 441
 442         if (video) {
 443                 s += video->identifier() + "_";
 444         }
 445
 446         for (auto i: text) {
 447                 s += i->identifier () + " ";
 448         }
 449
 450         s += string (_reference_video ? "1" : "0");
 451         for (auto text: _reference_text) {
 452                 s += string(text ? "1" : "0");
 453         }
 454         return s;
 455 }
 456
 457 void
 458 DCPContent::add_kdm (dcp::EncryptedKDM k)
 459 {
 460         _kdm = k;
 461 }
 462
 463 void
 464 DCPContent::add_ov (boost::filesystem::path ov)
 465 {
 466         read_directory (ov);
 467 }
 468
 469 bool
 470 DCPContent::can_be_played () const
 471 {
 472         return !needs_kdm() && !needs_assets();
 473 }
 474
 475 bool
 476 DCPContent::needs_kdm () const
 477 {
 478         boost::mutex::scoped_lock lm (_mutex);
 479         return _encrypted && !_kdm_valid;
 480 }
 481
 482 bool
 483 DCPContent::needs_assets () const
 484 {
 485         boost::mutex::scoped_lock lm (_mutex);
 486         return _needs_assets;
 487 }
 488
 489 vector<boost::filesystem::path>
 490 DCPContent::directories () const
 491 {
 492         return dcp::DCP::directories_from_files (paths());
 493 }
 494
 495 void
 496 DCPContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 497 {
 498         Content::add_properties (film, p);
 499         if (video) {
 500                 video->add_properties (p);
 501         }
 502         if (audio) {
 503                 audio->add_properties (film, p);
 504         }
 505 }
 506
 507 void
 508 DCPContent::set_default_colour_conversion ()
 509 {
 510         /* Default to no colour conversion for DCPs */
 511         if (video) {
 512                 video->unset_colour_conversion ();
 513         }
 514 }
 515
 516 void
 517 DCPContent::set_reference_video (bool r)
 518 {
 519         ContentChangeSignaller cc (this, DCPContentProperty::REFERENCE_VIDEO);
 520
 521         {
 522                 boost::mutex::scoped_lock lm (_mutex);
 523                 _reference_video = r;
 524         }
 525 }
 526
 527 void
 528 DCPContent::set_reference_audio (bool r)
 529 {
 530         ContentChangeSignaller cc (this, DCPContentProperty::REFERENCE_AUDIO);
 531
 532         {
 533                 boost::mutex::scoped_lock lm (_mutex);
 534                 _reference_audio = r;
 535         }
 536 }
 537
 538 void
 539 DCPContent::set_reference_text (TextType type, bool r)
 540 {
 541         ContentChangeSignaller cc (this, DCPContentProperty::REFERENCE_TEXT);
 542
 543         {
 544                 boost::mutex::scoped_lock lm (_mutex);
 545                 _reference_text[type] = r;
 546         }
 547 }
 548
 549 list<DCPTimePeriod>
 550 DCPContent::reels (shared_ptr<const Film> film) const
 551 {
 552         auto reel_lengths = _reel_lengths;
 553         if (reel_lengths.empty()) {
 554                 /* Old metadata with no reel lengths; get them here instead */
 555                 try {
 556                         scoped_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film->tolerant()));
 557                         reel_lengths = examiner->reel_lengths ();
 558                 } catch (...) {
 559                         /* Could not examine the DCP; guess reels */
 560                         reel_lengths.push_back (length_after_trim(film).frames_round(film->video_frame_rate()));
 561                 }
 562         }
 563
 564         list<DCPTimePeriod> p;
 565
 566         /* This content's frame rate must be the same as the output DCP rate, so we can
 567            convert `directly' from ContentTime to DCPTime.
 568         */
 569
 570         /* The starting point of this content on the timeline */
 571         auto pos = position() - DCPTime (trim_start().get());
 572
 573         for (auto i: reel_lengths) {
 574                 /* This reel runs from `pos' to `to' */
 575                 DCPTime const to = pos + DCPTime::from_frames (i, film->video_frame_rate());
 576                 if (to > position()) {
 577                         p.push_back (DCPTimePeriod(max(position(), pos), min(end(film), to)));
 578                         if (to > end(film)) {
 579                                 break;
 580                         }
 581                 }
 582                 pos = to;
 583         }
 584
 585         return p;
 586 }
 587
 588 list<DCPTime>
 589 DCPContent::reel_split_points (shared_ptr<const Film> film) const
 590 {
 591         list<DCPTime> s;
 592         for (auto i: reels(film)) {
 593                 s.push_back (i.from);
 594         }
 595         return s;
 596 }
 597
 598 bool
 599 DCPContent::can_reference (shared_ptr<const Film> film, function<bool (shared_ptr<const Content>)> part, string overlapping, string& why_not) const
 600 {
 601         /* We must be using the same standard as the film */
 602         if (_standard) {
 603                 if (_standard.get() == dcp::Standard::INTEROP && !film->interop()) {
 604                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 605                         why_not = _("it is Interop and the film is set to SMPTE.");
 606                         return false;
 607                 } else if (_standard.get() == dcp::Standard::SMPTE && film->interop()) {
 608                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 609                         why_not = _("it is SMPTE and the film is set to Interop.");
 610                         return false;
 611                 }
 612         }
 613
 614         /* And the same frame rate */
 615         if (!video_frame_rate() || (lrint(video_frame_rate().get()) != film->video_frame_rate())) {
 616                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 617                 why_not = _("it has a different frame rate to the film.");
 618                 return false;
 619         }
 620
 621         auto const fr = film->reels ();
 622
 623         list<DCPTimePeriod> reel_list;
 624         try {
 625                 reel_list = reels (film);
 626         } catch (dcp::ReadError &) {
 627                 /* We couldn't read the DCP; it's probably missing */
 628                 return false;
 629         } catch (dcp::KDMDecryptionError &) {
 630                 /* We have an incorrect KDM */
 631                 return false;
 632         }
 633
 634         /* fr must contain reels().  It can also contain other reels, but it must at
 635            least contain reels().
 636         */
 637         for (auto i: reel_list) {
 638                 if (find (fr.begin(), fr.end(), i) == fr.end ()) {
 639                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 640                         why_not = _("its reel lengths differ from those in the film; set the reel mode to 'split by video content'.");
 641                         return false;
 642                 }
 643         }
 644
 645         auto a = overlaps (film, film->content(), part, position(), end(film));
 646         if (a.size() != 1 || a.front().get() != this) {
 647                 why_not = overlapping;
 648                 return false;
 649         }
 650
 651         return true;
 652 }
 653
 654 static
 655 bool check_video (shared_ptr<const Content> c)
 656 {
 657         return static_cast<bool>(c->video) && c->video->use();
 658 }
 659
 660 bool
 661 DCPContent::can_reference_video (shared_ptr<const Film> film, string& why_not) const
 662 {
 663         if (!video) {
 664                 why_not = _("There is no video in this DCP");
 665                 return false;
 666         }
 667
 668         if (film->resolution() != resolution()) {
 669                 if (resolution() == Resolution::FOUR_K) {
 670                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 671                         why_not = _("it is 4K and the film is 2K.");
 672                 } else {
 673                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 674                         why_not = _("it is 2K and the film is 4K.");
 675                 }
 676                 return false;
 677         } else if (film->frame_size() != video->size()) {
 678                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 679                 why_not = _("its video frame size differs from the film's.");
 680                 return false;
 681         }
 682
 683         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 684         return can_reference (film, bind (&check_video, _1), _("it overlaps other video content; remove the other content."), why_not);
 685 }
 686
 687 static
 688 bool check_audio (shared_ptr<const Content> c)
 689 {
 690         return static_cast<bool>(c->audio) && !c->audio->mapping().mapped_output_channels().empty();
 691 }
 692
 693 bool
 694 DCPContent::can_reference_audio (shared_ptr<const Film> film, string& why_not) const
 695 {
 696         shared_ptr<DCPDecoder> decoder;
 697         try {
 698                 decoder = make_shared<DCPDecoder>(film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>());
 699         } catch (dcp::ReadError &) {
 700                 /* We couldn't read the DCP, so it's probably missing */
 701                 return false;
 702         } catch (DCPError &) {
 703                 /* We couldn't read the DCP, so it's probably missing */
 704                 return false;
 705         } catch (dcp::KDMDecryptionError &) {
 706                 /* We have an incorrect KDM */
 707                 return false;
 708         }
 709
 710         for (auto i: decoder->reels()) {
 711                 if (!i->main_sound()) {
 712                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 713                         why_not = _("it does not have sound in all its reels.");
 714                         return false;
 715                 }
 716         }
 717
 718         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 719         return can_reference (film, bind (&check_audio, _1), _("it overlaps other audio content; remove the other content."), why_not);
 720 }
 721
 722 static
 723 bool check_text (shared_ptr<const Content> c)
 724 {
 725         return !c->text.empty();
 726 }
 727
 728 bool
 729 DCPContent::can_reference_text (shared_ptr<const Film> film, TextType type, string& why_not) const
 730 {
 731         shared_ptr<DCPDecoder> decoder;
 732         try {
 733                 decoder = make_shared<DCPDecoder>(film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>());
 734         } catch (dcp::ReadError &) {
 735                 /* We couldn't read the DCP, so it's probably missing */
 736                 return false;
 737         } catch (dcp::KDMDecryptionError &) {
 738                 /* We have an incorrect KDM */
 739                 return false;
 740         }
 741
 742         for (auto i: decoder->reels()) {
 743                 if (type == TextType::OPEN_SUBTITLE) {
 744                         if (!i->main_subtitle()) {
 745                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 746                                 why_not = _("it does not have open subtitles in all its reels.");
 747                                 return false;
 748                         } else if (i->main_subtitle()->entry_point().get_value_or(0) != 0) {
 749                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 750                                 why_not = _("one of its subtitle reels has a non-zero entry point so it must be re-written.");
 751                                 return false;
 752                         }
 753                 }
 754                 if (type == TextType::CLOSED_CAPTION) {
 755                         if (i->closed_captions().empty()) {
 756                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 757                                 why_not = _("it does not have closed captions in all its reels.");
 758                                 return false;
 759                         }
 760                         for (auto j: i->closed_captions()) {
 761                                 if (j->entry_point().get_value_or(0) != 0) {
 762                                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 763                                         why_not = _("one of its closed caption has a non-zero entry point so it must be re-written.");
 764                                         return false;
 765                                 }
 766                         }
 767                 }
 768         }
 769
 770         if (trim_start() != dcpomatic::ContentTime()) {
 771                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 772                 why_not = _("it has a start trim so its subtitles or closed captions must be re-written.");
 773                 return false;
 774         }
 775
 776         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 777         return can_reference (film, bind (&check_text, _1), _("it overlaps other text content; remove the other content."), why_not);
 778 }
 779
 780 void
 781 DCPContent::take_settings_from (shared_ptr<const Content> c)
 782 {
 783         auto dc = dynamic_pointer_cast<const DCPContent>(c);
 784         if (!dc) {
 785                 return;
 786         }
 787
 788         _reference_video = dc->_reference_video;
 789         _reference_audio = dc->_reference_audio;
 790         _reference_text = dc->_reference_text;
 791 }
 792
 793 void
 794 DCPContent::set_cpl (string id)
 795 {
 796         ContentChangeSignaller cc (this, DCPContentProperty::CPL);
 797
 798         {
 799                 boost::mutex::scoped_lock lm (_mutex);
 800                 _cpl = id;
 801         }
 802 }
 803
 804 bool
 805 DCPContent::kdm_timing_window_valid () const
 806 {
 807         if (!_kdm) {
 808                 return true;
 809         }
 810
 811         dcp::LocalTime now;
 812         return _kdm->not_valid_before() < now && now < _kdm->not_valid_after();
 813 }
 814
 815
 816 Resolution
 817 DCPContent::resolution () const
 818 {
 819         if (video->size().width > 2048 || video->size().height > 1080) {
 820                 return Resolution::FOUR_K;
 821         }
 822
 823         return Resolution::TWO_K;
 824 }
 825
 826
 827 void
 828 add_fonts_from_examiner(shared_ptr<TextContent> text, vector<vector<shared_ptr<Font>>> const & all_fonts)
 829 {
 830         int reel_number = 0;
 831         for (auto reel_fonts: all_fonts) {
 832                 for (auto font: reel_fonts) {
 833                         /* Each reel could have its own font with the same ID, so we disambiguate them here
 834                          * by prepending the reel number.  We do the same disambiguation when emitting the
 835                          * subtitles in the DCP decoder.
 836                          */
 837                         auto font_copy = make_shared<dcpomatic::Font>(*font);
 838                         font_copy->set_id(id_for_font_in_reel(font->id(), reel_number));
 839                         text->add_font(font_copy);
 840                 }
 841                 ++reel_number;
 842         }
 843
 844 }
 845
 846
 847 string
 848 id_for_font_in_reel(string id, int reel)
 849 {
 850         return String::compose("%1_%2", reel, id);
 851 }
 852
 853
 854 void
 855 DCPContent::check_font_ids()
 856 {
 857         if (text.empty()) {
 858                 return;
 859         }
 860
 861         DCPExaminer examiner(shared_from_this(), true);
 862         add_fonts_from_examiner(text.front(), examiner.fonts());
 863 }
 864