src/lib/dcp_content.cc

   1 /*
   2     Copyright (C) 2014-2022 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 "text_content.h"
  35 #include "video_content.h"
  36 #include <dcp/dcp.h>
  37 #include <dcp/raw_convert.h>
  38 #include <dcp/exceptions.h>
  39 #include <dcp/reel_closed_caption_asset.h>
  40 #include <dcp/reel_picture_asset.h>
  41 #include <dcp/reel_subtitle_asset.h>
  42 #include <dcp/reel.h>
  43 #include <libxml++/libxml++.h>
  44 #include <iterator>
  45 #include <iostream>
  46
  47 #include "i18n.h"
  48
  49
  50 using std::cout;
  51 using std::dynamic_pointer_cast;
  52 using std::function;
  53 using std::list;
  54 using std::make_shared;
  55 using std::shared_ptr;
  56 using std::string;
  57 using std::vector;
  58 using boost::optional;
  59 using boost::scoped_ptr;
  60 #if BOOST_VERSION >= 106100
  61 using namespace boost::placeholders;
  62 #endif
  63 using dcp::raw_convert;
  64 using namespace dcpomatic;
  65
  66
  67 int const DCPContentProperty::NEEDS_ASSETS       = 600;
  68 int const DCPContentProperty::NEEDS_KDM          = 601;
  69 int const DCPContentProperty::REFERENCE_VIDEO    = 602;
  70 int const DCPContentProperty::REFERENCE_AUDIO    = 603;
  71 int const DCPContentProperty::REFERENCE_TEXT     = 604;
  72 int const DCPContentProperty::NAME               = 605;
  73 int const DCPContentProperty::TEXTS              = 606;
  74 int const DCPContentProperty::CPL                = 607;
  75
  76
  77 DCPContent::DCPContent (boost::filesystem::path p)
  78         : _encrypted (false)
  79         , _needs_assets (false)
  80         , _kdm_valid (false)
  81         , _reference_video (false)
  82         , _reference_audio (false)
  83         , _three_d (false)
  84 {
  85         LOG_GENERAL ("Creating DCP content from %1", p.string());
  86
  87         read_directory (p);
  88         set_default_colour_conversion ();
  89 }
  90
  91 DCPContent::DCPContent (cxml::ConstNodePtr node, int version)
  92         : Content (node)
  93 {
  94         video = VideoContent::from_xml (this, node, version, VideoRange::FULL);
  95         audio = AudioContent::from_xml (this, node, version);
  96         list<string> notes;
  97         text = TextContent::from_xml (this, node, version, notes);
  98         atmos = AtmosContent::from_xml (this, node);
  99
 100         if (video && audio) {
 101                 audio->set_stream (
 102                         make_shared<AudioStream> (
 103                                 node->number_child<int> ("AudioFrameRate"),
 104                                 /* AudioLength was not present in some old metadata versions */
 105                                 node->optional_number_child<Frame>("AudioLength").get_value_or (
 106                                         video->length() * node->number_child<int>("AudioFrameRate") / video_frame_rate().get()
 107                                         ),
 108                                 AudioMapping (node->node_child ("AudioMapping"), version)
 109                                 )
 110                         );
 111         }
 112
 113         _name = node->string_child ("Name");
 114         _encrypted = node->bool_child ("Encrypted");
 115         _needs_assets = node->optional_bool_child("NeedsAssets").get_value_or (false);
 116         if (node->optional_node_child ("KDM")) {
 117                 _kdm = dcp::EncryptedKDM (node->string_child ("KDM"));
 118         }
 119         _kdm_valid = node->bool_child ("KDMValid");
 120         _reference_video = node->optional_bool_child ("ReferenceVideo").get_value_or (false);
 121         _reference_audio = node->optional_bool_child ("ReferenceAudio").get_value_or (false);
 122         if (version >= 37) {
 123                 _reference_text[TextType::OPEN_SUBTITLE] = node->optional_bool_child("ReferenceOpenSubtitle").get_value_or(false);
 124                 _reference_text[TextType::CLOSED_CAPTION] = node->optional_bool_child("ReferenceClosedCaption").get_value_or(false);
 125         } else {
 126                 _reference_text[TextType::OPEN_SUBTITLE] = node->optional_bool_child("ReferenceSubtitle").get_value_or(false);
 127                 _reference_text[TextType::CLOSED_CAPTION] = false;
 128         }
 129         if (node->optional_string_child("Standard")) {
 130                 auto const s = node->optional_string_child("Standard").get();
 131                 if (s == "Interop") {
 132                         _standard = dcp::Standard::INTEROP;
 133                 } else if (s == "SMPTE") {
 134                         _standard = dcp::Standard::SMPTE;
 135                 } else {
 136                         DCPOMATIC_ASSERT (false);
 137                 }
 138         }
 139         _three_d = node->optional_bool_child("ThreeD").get_value_or (false);
 140
 141         auto ck = node->optional_string_child("ContentKind");
 142         if (ck) {
 143                 _content_kind = dcp::ContentKind::from_name(*ck);
 144         }
 145         _cpl = node->optional_string_child("CPL");
 146         for (auto i: node->node_children("ReelLength")) {
 147                 _reel_lengths.push_back (raw_convert<int64_t> (i->content ()));
 148         }
 149
 150         for (auto i: node->node_children("Marker")) {
 151                 _markers[dcp::marker_from_string(i->string_attribute("type"))] = ContentTime(raw_convert<int64_t>(i->content()));
 152         }
 153
 154         for (auto i: node->node_children("Rating")) {
 155                 _ratings.push_back (dcp::Rating(i));
 156         }
 157
 158         for (auto i: node->node_children("ContentVersion")) {
 159                 _content_versions.push_back (i->content());
 160         }
 161 }
 162
 163 void
 164 DCPContent::read_directory (boost::filesystem::path p)
 165 {
 166         using namespace boost::filesystem;
 167
 168         bool have_assetmap = false;
 169         bool have_metadata = false;
 170
 171         for (auto i: directory_iterator(p)) {
 172                 if (i.path().filename() == "ASSETMAP" || i.path().filename() == "ASSETMAP.xml") {
 173                         have_assetmap = true;
 174                 } else if (i.path().filename() == "metadata.xml") {
 175                         have_metadata = true;
 176                 }
 177         }
 178
 179         if (!have_assetmap) {
 180                 if (!have_metadata) {
 181                         throw DCPError ("No ASSETMAP or ASSETMAP.xml file found: is this a DCP?");
 182                 } else {
 183                         throw ProjectFolderError ();
 184                 }
 185         }
 186
 187         read_sub_directory (p);
 188 }
 189
 190 void
 191 DCPContent::read_sub_directory (boost::filesystem::path p)
 192 {
 193         LOG_GENERAL ("DCPContent::read_sub_directory reads %1", p.string());
 194         for (auto i: boost::filesystem::directory_iterator(p)) {
 195                 if (boost::filesystem::is_regular_file(i.path())) {
 196                         LOG_GENERAL ("Inside there's regular file %1", i.path().string());
 197                         add_path (i.path());
 198                 } else if (boost::filesystem::is_directory(i.path()) && i.path().filename() != ".AppleDouble") {
 199                         LOG_GENERAL ("Inside there's directory %1", i.path().string());
 200                         read_sub_directory (i.path());
 201                 } else {
 202                         LOG_GENERAL("Ignoring %1 from inside: status is %2", i.path().string(), static_cast<int>(boost::filesystem::status(i.path()).type()));
 203                 }
 204         }
 205 }
 206
 207 /** @param film Film, or 0 */
 208 void
 209 DCPContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
 210 {
 211         bool const needed_assets = needs_assets ();
 212         bool const needed_kdm = needs_kdm ();
 213         string const old_name = name ();
 214
 215         ContentChangeSignaller cc_texts (this, DCPContentProperty::TEXTS);
 216         ContentChangeSignaller cc_assets (this, DCPContentProperty::NEEDS_ASSETS);
 217         ContentChangeSignaller cc_kdm (this, DCPContentProperty::NEEDS_KDM);
 218         ContentChangeSignaller cc_name (this, DCPContentProperty::NAME);
 219
 220         if (job) {
 221                 job->set_progress_unknown ();
 222         }
 223         Content::examine (film, job);
 224
 225         auto examiner = make_shared<DCPExaminer>(shared_from_this(), film ? film->tolerant() : true);
 226
 227         if (examiner->has_video()) {
 228                 {
 229                         boost::mutex::scoped_lock lm (_mutex);
 230                         video = make_shared<VideoContent>(this);
 231                 }
 232                 video->take_from_examiner(film, examiner);
 233                 set_default_colour_conversion ();
 234         }
 235
 236         if (examiner->has_audio()) {
 237                 {
 238                         boost::mutex::scoped_lock lm (_mutex);
 239                         audio = make_shared<AudioContent>(this);
 240                 }
 241                 auto as = make_shared<AudioStream>(examiner->audio_frame_rate(), examiner->audio_length(), examiner->audio_channels());
 242                 audio->set_stream (as);
 243                 auto m = as->mapping ();
 244                 m.make_default (film ? film->audio_processor() : 0);
 245                 as->set_mapping (m);
 246         }
 247
 248         if (examiner->has_atmos()) {
 249                 {
 250                         boost::mutex::scoped_lock lm (_mutex);
 251                         atmos = make_shared<AtmosContent>(this);
 252                 }
 253                 /* Setting length will cause calculations to be made based on edit rate, so that must
 254                  * be set up first otherwise hard-to-spot exceptions will be thrown.
 255                  */
 256                 atmos->set_edit_rate (examiner->atmos_edit_rate());
 257                 atmos->set_length (examiner->atmos_length());
 258         }
 259
 260         list<shared_ptr<TextContent>> new_text;
 261
 262         for (int i = 0; i < examiner->text_count(TextType::OPEN_SUBTITLE); ++i) {
 263                 auto c = make_shared<TextContent>(this, TextType::OPEN_SUBTITLE, TextType::OPEN_SUBTITLE);
 264                 c->set_language (examiner->open_subtitle_language());
 265                 add_fonts_from_examiner(c, examiner->fonts());
 266                 new_text.push_back (c);
 267         }
 268
 269         for (int i = 0; i < examiner->text_count(TextType::CLOSED_CAPTION); ++i) {
 270                 auto c = make_shared<TextContent>(this, TextType::CLOSED_CAPTION, TextType::CLOSED_CAPTION);
 271                 c->set_dcp_track (examiner->dcp_text_track(i));
 272                 new_text.push_back (c);
 273         }
 274
 275         {
 276                 boost::mutex::scoped_lock lm (_mutex);
 277                 text = new_text;
 278                 _name = examiner->name ();
 279                 _encrypted = examiner->encrypted ();
 280                 _needs_assets = examiner->needs_assets ();
 281                 _kdm_valid = examiner->kdm_valid ();
 282                 _standard = examiner->standard ();
 283                 _three_d = examiner->three_d ();
 284                 _content_kind = examiner->content_kind ();
 285                 _cpl = examiner->cpl ();
 286                 _reel_lengths = examiner->reel_lengths ();
 287                 for (auto const& i: examiner->markers()) {
 288                         _markers[i.first] = ContentTime(i.second.as_editable_units_ceil(DCPTime::HZ));
 289                 }
 290                 _ratings = examiner->ratings ();
 291                 _content_versions = examiner->content_versions ();
 292         }
 293
 294         if (needed_assets == needs_assets()) {
 295                 cc_assets.abort ();
 296         }
 297
 298         if (needed_kdm == needs_kdm()) {
 299                 cc_kdm.abort ();
 300         }
 301
 302         if (old_name == name()) {
 303                 cc_name.abort ();
 304         }
 305
 306         if (video) {
 307                 video->set_frame_type (_three_d ? VideoFrameType::THREE_D : VideoFrameType::TWO_D);
 308         }
 309 }
 310
 311 string
 312 DCPContent::summary () const
 313 {
 314         boost::mutex::scoped_lock lm (_mutex);
 315         return String::compose (_("%1 [DCP]"), _name);
 316 }
 317
 318 string
 319 DCPContent::technical_summary () const
 320 {
 321         string s = Content::technical_summary() + " - ";
 322         if (video) {
 323                 s += video->technical_summary() + " - ";
 324         }
 325         if (audio) {
 326                 s += audio->technical_summary() + " - ";
 327         }
 328         return s;
 329 }
 330
 331 void
 332 DCPContent::as_xml (xmlpp::Node* node, bool with_paths) const
 333 {
 334         node->add_child("Type")->add_child_text ("DCP");
 335
 336         Content::as_xml (node, with_paths);
 337
 338         if (video) {
 339                 video->as_xml (node);
 340         }
 341
 342         if (audio) {
 343                 audio->as_xml (node);
 344                 node->add_child("AudioFrameRate")->add_child_text (raw_convert<string> (audio->stream()->frame_rate()));
 345                 node->add_child("AudioLength")->add_child_text (raw_convert<string> (audio->stream()->length()));
 346                 audio->stream()->mapping().as_xml (node->add_child("AudioMapping"));
 347         }
 348
 349         for (auto i: text) {
 350                 i->as_xml (node);
 351         }
 352
 353         if (atmos) {
 354                 atmos->as_xml (node);
 355         }
 356
 357         boost::mutex::scoped_lock lm (_mutex);
 358         node->add_child("Name")->add_child_text (_name);
 359         node->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
 360         node->add_child("NeedsAssets")->add_child_text (_needs_assets ? "1" : "0");
 361         if (_kdm) {
 362                 node->add_child("KDM")->add_child_text (_kdm->as_xml ());
 363         }
 364         node->add_child("KDMValid")->add_child_text (_kdm_valid ? "1" : "0");
 365         node->add_child("ReferenceVideo")->add_child_text (_reference_video ? "1" : "0");
 366         node->add_child("ReferenceAudio")->add_child_text (_reference_audio ? "1" : "0");
 367         node->add_child("ReferenceOpenSubtitle")->add_child_text(_reference_text[TextType::OPEN_SUBTITLE] ? "1" : "0");
 368         node->add_child("ReferenceClosedCaption")->add_child_text(_reference_text[TextType::CLOSED_CAPTION] ? "1" : "0");
 369         if (_standard) {
 370                 switch (_standard.get ()) {
 371                 case dcp::Standard::INTEROP:
 372                         node->add_child("Standard")->add_child_text ("Interop");
 373                         break;
 374                 case dcp::Standard::SMPTE:
 375                         node->add_child("Standard")->add_child_text ("SMPTE");
 376                         break;
 377                 default:
 378                         DCPOMATIC_ASSERT (false);
 379                 }
 380         }
 381         node->add_child("ThreeD")->add_child_text (_three_d ? "1" : "0");
 382         if (_content_kind) {
 383                 node->add_child("ContentKind")->add_child_text(_content_kind->name());
 384         }
 385         if (_cpl) {
 386                 node->add_child("CPL")->add_child_text (_cpl.get ());
 387         }
 388         for (auto i: _reel_lengths) {
 389                 node->add_child("ReelLength")->add_child_text (raw_convert<string> (i));
 390         }
 391
 392         for (auto const& i: _markers) {
 393                 auto marker = node->add_child("Marker");
 394                 marker->set_attribute("type", dcp::marker_to_string(i.first));
 395                 marker->add_child_text(raw_convert<string>(i.second.get()));
 396         }
 397
 398         for (auto i: _ratings) {
 399                 auto rating = node->add_child("Rating");
 400                 i.as_xml (rating);
 401         }
 402
 403         for (auto i: _content_versions) {
 404                 node->add_child("ContentVersion")->add_child_text(i);
 405         }
 406 }
 407
 408 DCPTime
 409 DCPContent::full_length (shared_ptr<const Film> film) const
 410 {
 411         if (!video) {
 412                 return {};
 413         }
 414         FrameRateChange const frc (film, shared_from_this());
 415         return DCPTime::from_frames (llrint(video->length() * frc.factor()), film->video_frame_rate());
 416 }
 417
 418 DCPTime
 419 DCPContent::approximate_length () const
 420 {
 421         if (!video) {
 422                 return {};
 423         }
 424         return DCPTime::from_frames (video->length(), 24);
 425 }
 426
 427 string
 428 DCPContent::identifier () const
 429 {
 430         string s = Content::identifier() + "_";
 431
 432         if (video) {
 433                 s += video->identifier() + "_";
 434         }
 435
 436         for (auto i: text) {
 437                 s += i->identifier () + " ";
 438         }
 439
 440         s += string (_reference_video ? "1" : "0");
 441         for (auto text: _reference_text) {
 442                 s += string(text ? "1" : "0");
 443         }
 444         return s;
 445 }
 446
 447 void
 448 DCPContent::add_kdm (dcp::EncryptedKDM k)
 449 {
 450         _kdm = k;
 451 }
 452
 453 void
 454 DCPContent::add_ov (boost::filesystem::path ov)
 455 {
 456         read_directory (ov);
 457 }
 458
 459 bool
 460 DCPContent::can_be_played () const
 461 {
 462         return !needs_kdm() && !needs_assets();
 463 }
 464
 465 bool
 466 DCPContent::needs_kdm () const
 467 {
 468         boost::mutex::scoped_lock lm (_mutex);
 469         return _encrypted && !_kdm_valid;
 470 }
 471
 472 bool
 473 DCPContent::needs_assets () const
 474 {
 475         boost::mutex::scoped_lock lm (_mutex);
 476         return _needs_assets;
 477 }
 478
 479 vector<boost::filesystem::path>
 480 DCPContent::directories () const
 481 {
 482         return dcp::DCP::directories_from_files (paths());
 483 }
 484
 485 void
 486 DCPContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 487 {
 488         Content::add_properties (film, p);
 489         if (video) {
 490                 video->add_properties (p);
 491         }
 492         if (audio) {
 493                 audio->add_properties (film, p);
 494         }
 495 }
 496
 497 void
 498 DCPContent::set_default_colour_conversion ()
 499 {
 500         /* Default to no colour conversion for DCPs */
 501         if (video) {
 502                 video->unset_colour_conversion ();
 503         }
 504 }
 505
 506 void
 507 DCPContent::set_reference_video (bool r)
 508 {
 509         ContentChangeSignaller cc (this, DCPContentProperty::REFERENCE_VIDEO);
 510
 511         {
 512                 boost::mutex::scoped_lock lm (_mutex);
 513                 _reference_video = r;
 514         }
 515 }
 516
 517 void
 518 DCPContent::set_reference_audio (bool r)
 519 {
 520         ContentChangeSignaller cc (this, DCPContentProperty::REFERENCE_AUDIO);
 521
 522         {
 523                 boost::mutex::scoped_lock lm (_mutex);
 524                 _reference_audio = r;
 525         }
 526 }
 527
 528 void
 529 DCPContent::set_reference_text (TextType type, bool r)
 530 {
 531         ContentChangeSignaller cc (this, DCPContentProperty::REFERENCE_TEXT);
 532
 533         {
 534                 boost::mutex::scoped_lock lm (_mutex);
 535                 _reference_text[type] = r;
 536         }
 537 }
 538
 539 list<DCPTimePeriod>
 540 DCPContent::reels (shared_ptr<const Film> film) const
 541 {
 542         auto reel_lengths = _reel_lengths;
 543         if (reel_lengths.empty()) {
 544                 /* Old metadata with no reel lengths; get them here instead */
 545                 try {
 546                         scoped_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film->tolerant()));
 547                         reel_lengths = examiner->reel_lengths ();
 548                 } catch (...) {
 549                         /* Could not examine the DCP; guess reels */
 550                         reel_lengths.push_back (length_after_trim(film).frames_round(film->video_frame_rate()));
 551                 }
 552         }
 553
 554         list<DCPTimePeriod> p;
 555
 556         /* This content's frame rate must be the same as the output DCP rate, so we can
 557            convert `directly' from ContentTime to DCPTime.
 558         */
 559
 560         /* The starting point of this content on the timeline */
 561         auto pos = position() - DCPTime (trim_start().get());
 562
 563         for (auto i: reel_lengths) {
 564                 /* This reel runs from `pos' to `to' */
 565                 DCPTime const to = pos + DCPTime::from_frames (i, film->video_frame_rate());
 566                 if (to > position()) {
 567                         p.push_back (DCPTimePeriod(max(position(), pos), min(end(film), to)));
 568                         if (to > end(film)) {
 569                                 break;
 570                         }
 571                 }
 572                 pos = to;
 573         }
 574
 575         return p;
 576 }
 577
 578 list<DCPTime>
 579 DCPContent::reel_split_points (shared_ptr<const Film> film) const
 580 {
 581         list<DCPTime> s;
 582         for (auto i: reels(film)) {
 583                 s.push_back (i.from);
 584         }
 585         return s;
 586 }
 587
 588 bool
 589 DCPContent::can_reference (shared_ptr<const Film> film, function<bool (shared_ptr<const Content>)> part, string overlapping, string& why_not) const
 590 {
 591         /* We must be using the same standard as the film */
 592         if (_standard) {
 593                 if (_standard.get() == dcp::Standard::INTEROP && !film->interop()) {
 594                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 595                         why_not = _("it is Interop and the film is set to SMPTE.");
 596                         return false;
 597                 } else if (_standard.get() == dcp::Standard::SMPTE && film->interop()) {
 598                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 599                         why_not = _("it is SMPTE and the film is set to Interop.");
 600                         return false;
 601                 }
 602         }
 603
 604         /* And the same frame rate */
 605         if (!video_frame_rate() || (lrint(video_frame_rate().get()) != film->video_frame_rate())) {
 606                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 607                 why_not = _("it has a different frame rate to the film.");
 608                 return false;
 609         }
 610
 611         auto const fr = film->reels ();
 612
 613         list<DCPTimePeriod> reel_list;
 614         try {
 615                 reel_list = reels (film);
 616         } catch (dcp::ReadError &) {
 617                 /* We couldn't read the DCP; it's probably missing */
 618                 return false;
 619         } catch (dcp::KDMDecryptionError &) {
 620                 /* We have an incorrect KDM */
 621                 return false;
 622         }
 623
 624         /* fr must contain reels().  It can also contain other reels, but it must at
 625            least contain reels().
 626         */
 627         for (auto i: reel_list) {
 628                 if (find (fr.begin(), fr.end(), i) == fr.end ()) {
 629                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 630                         why_not = _("its reel lengths differ from those in the film; set the reel mode to 'split by video content'.");
 631                         return false;
 632                 }
 633         }
 634
 635         auto a = overlaps (film, film->content(), part, position(), end(film));
 636         if (a.size() != 1 || a.front().get() != this) {
 637                 why_not = overlapping;
 638                 return false;
 639         }
 640
 641         return true;
 642 }
 643
 644 static
 645 bool check_video (shared_ptr<const Content> c)
 646 {
 647         return static_cast<bool>(c->video) && c->video->use();
 648 }
 649
 650 bool
 651 DCPContent::can_reference_video (shared_ptr<const Film> film, string& why_not) const
 652 {
 653         if (!video) {
 654                 why_not = _("There is no video in this DCP");
 655                 return false;
 656         }
 657
 658         if (film->resolution() != resolution()) {
 659                 if (resolution() == Resolution::FOUR_K) {
 660                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 661                         why_not = _("it is 4K and the film is 2K.");
 662                 } else {
 663                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 664                         why_not = _("it is 2K and the film is 4K.");
 665                 }
 666                 return false;
 667         } else if (film->frame_size() != video->size()) {
 668                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 669                 why_not = _("its video frame size differs from the film's.");
 670                 return false;
 671         }
 672
 673         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 674         return can_reference (film, bind (&check_video, _1), _("it overlaps other video content; remove the other content."), why_not);
 675 }
 676
 677 static
 678 bool check_audio (shared_ptr<const Content> c)
 679 {
 680         return static_cast<bool>(c->audio) && !c->audio->mapping().mapped_output_channels().empty();
 681 }
 682
 683 bool
 684 DCPContent::can_reference_audio (shared_ptr<const Film> film, string& why_not) const
 685 {
 686         shared_ptr<DCPDecoder> decoder;
 687         try {
 688                 decoder = make_shared<DCPDecoder>(film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>());
 689         } catch (dcp::ReadError &) {
 690                 /* We couldn't read the DCP, so it's probably missing */
 691                 return false;
 692         } catch (DCPError &) {
 693                 /* We couldn't read the DCP, so it's probably missing */
 694                 return false;
 695         } catch (dcp::KDMDecryptionError &) {
 696                 /* We have an incorrect KDM */
 697                 return false;
 698         }
 699
 700         for (auto i: decoder->reels()) {
 701                 if (!i->main_sound()) {
 702                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 703                         why_not = _("it does not have sound in all its reels.");
 704                         return false;
 705                 }
 706         }
 707
 708         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 709         return can_reference (film, bind (&check_audio, _1), _("it overlaps other audio content; remove the other content."), why_not);
 710 }
 711
 712 static
 713 bool check_text (shared_ptr<const Content> c)
 714 {
 715         return !c->text.empty();
 716 }
 717
 718 bool
 719 DCPContent::can_reference_text (shared_ptr<const Film> film, TextType type, string& why_not) const
 720 {
 721         shared_ptr<DCPDecoder> decoder;
 722         try {
 723                 decoder = make_shared<DCPDecoder>(film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>());
 724         } catch (dcp::ReadError &) {
 725                 /* We couldn't read the DCP, so it's probably missing */
 726                 return false;
 727         } catch (dcp::KDMDecryptionError &) {
 728                 /* We have an incorrect KDM */
 729                 return false;
 730         }
 731
 732         for (auto i: decoder->reels()) {
 733                 if (type == TextType::OPEN_SUBTITLE) {
 734                         if (!i->main_subtitle()) {
 735                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 736                                 why_not = _("it does not have open subtitles in all its reels.");
 737                                 return false;
 738                         } else if (i->main_subtitle()->entry_point().get_value_or(0) != 0) {
 739                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 740                                 why_not = _("one of its subtitle reels has a non-zero entry point so it must be re-written.");
 741                                 return false;
 742                         }
 743                 }
 744                 if (type == TextType::CLOSED_CAPTION) {
 745                         if (i->closed_captions().empty()) {
 746                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 747                                 why_not = _("it does not have closed captions in all its reels.");
 748                                 return false;
 749                         }
 750                         for (auto j: i->closed_captions()) {
 751                                 if (j->entry_point().get_value_or(0) != 0) {
 752                                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 753                                         why_not = _("one of its closed caption has a non-zero entry point so it must be re-written.");
 754                                         return false;
 755                                 }
 756                         }
 757                 }
 758         }
 759
 760         if (trim_start() != dcpomatic::ContentTime()) {
 761                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 762                 why_not = _("it has a start trim so its subtitles or closed captions must be re-written.");
 763                 return false;
 764         }
 765
 766         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 767         return can_reference (film, bind (&check_text, _1), _("it overlaps other text content; remove the other content."), why_not);
 768 }
 769
 770 void
 771 DCPContent::take_settings_from (shared_ptr<const Content> c)
 772 {
 773         auto dc = dynamic_pointer_cast<const DCPContent>(c);
 774         if (!dc) {
 775                 return;
 776         }
 777
 778         _reference_video = dc->_reference_video;
 779         _reference_audio = dc->_reference_audio;
 780         _reference_text = dc->_reference_text;
 781 }
 782
 783 void
 784 DCPContent::set_cpl (string id)
 785 {
 786         ContentChangeSignaller cc (this, DCPContentProperty::CPL);
 787
 788         {
 789                 boost::mutex::scoped_lock lm (_mutex);
 790                 _cpl = id;
 791         }
 792 }
 793
 794 bool
 795 DCPContent::kdm_timing_window_valid () const
 796 {
 797         if (!_kdm) {
 798                 return true;
 799         }
 800
 801         dcp::LocalTime now;
 802         return _kdm->not_valid_before() < now && now < _kdm->not_valid_after();
 803 }
 804
 805
 806 Resolution
 807 DCPContent::resolution () const
 808 {
 809         if (video->size().width > 2048 || video->size().height > 1080) {
 810                 return Resolution::FOUR_K;
 811         }
 812
 813         return Resolution::TWO_K;
 814 }
 815
 816
 817 void
 818 add_fonts_from_examiner(shared_ptr<TextContent> text, vector<vector<shared_ptr<Font>>> const & all_fonts)
 819 {
 820         int reel_number = 0;
 821         for (auto reel_fonts: all_fonts) {
 822                 for (auto font: reel_fonts) {
 823                         /* Each reel could have its own font with the same ID, so we disambiguate them here
 824                          * by prepending the reel number.  We do the same disambiguation when emitting the
 825                          * subtitles in the DCP decoder.
 826                          */
 827                         font->set_id(id_for_font_in_reel(font->id(), reel_number));
 828                         text->add_font(font);
 829                 }
 830                 ++reel_number;
 831         }
 832
 833 }
 834
 835
 836 string
 837 id_for_font_in_reel(string id, int reel)
 838 {
 839         return String::compose("%1_%2", reel, id);
 840 }
 841
 842
 843 void
 844 DCPContent::check_font_ids()
 845 {
 846         if (text.empty()) {
 847                 return;
 848         }
 849
 850         DCPExaminer examiner(shared_from_this(), true);
 851         add_fonts_from_examiner(text.front(), examiner.fonts());
 852 }
 853