src/lib/dcp_content.cc

   1 /*
   2     Copyright (C) 2014-2020 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 #include "atmos_content.h"
  22 #include "dcp_content.h"
  23 #include "video_content.h"
  24 #include "audio_content.h"
  25 #include "dcp_examiner.h"
  26 #include "job.h"
  27 #include "film.h"
  28 #include "config.h"
  29 #include "overlaps.h"
  30 #include "compose.hpp"
  31 #include "dcp_decoder.h"
  32 #include "log.h"
  33 #include "dcpomatic_log.h"
  34 #include "text_content.h"
  35 #include <dcp/dcp.h>
  36 #include <dcp/raw_convert.h>
  37 #include <dcp/exceptions.h>
  38 #include <dcp/reel_closed_caption_asset.h>
  39 #include <dcp/reel_picture_asset.h>
  40 #include <dcp/reel_subtitle_asset.h>
  41 #include <dcp/reel.h>
  42 #include <libxml++/libxml++.h>
  43 #include <iterator>
  44 #include <iostream>
  45
  46 #include "i18n.h"
  47
  48 using std::cout;
  49 using std::distance;
  50 using std::list;
  51 using std::make_shared;
  52 using std::map;
  53 using std::pair;
  54 using std::shared_ptr;
  55 using std::string;
  56 using std::vector;
  57 using boost::scoped_ptr;
  58 using boost::optional;
  59 using std::function;
  60 using std::dynamic_pointer_cast;
  61 #if BOOST_VERSION >= 106100
  62 using namespace boost::placeholders;
  63 #endif
  64 using dcp::raw_convert;
  65 using namespace dcpomatic;
  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 DCPContent::DCPContent (boost::filesystem::path p)
  77         : _encrypted (false)
  78         , _needs_assets (false)
  79         , _kdm_valid (false)
  80         , _reference_video (false)
  81         , _reference_audio (false)
  82         , _three_d (false)
  83 {
  84         LOG_GENERAL ("Creating DCP content from %1", p.string());
  85
  86         read_directory (p);
  87         set_default_colour_conversion ();
  88
  89         for (int i = 0; i < static_cast<int>(TextType::COUNT); ++i) {
  90                 _reference_text[i] = false;
  91         }
  92 }
  93
  94 DCPContent::DCPContent (cxml::ConstNodePtr node, int version)
  95         : Content (node)
  96 {
  97         video = VideoContent::from_xml (this, node, version);
  98         audio = AudioContent::from_xml (this, node, version);
  99         text = TextContent::from_xml (this, node, version);
 100         atmos = AtmosContent::from_xml (this, node);
 101
 102         for (int i = 0; i < static_cast<int>(TextType::COUNT); ++i) {
 103                 _reference_text[i] = false;
 104         }
 105
 106         if (video && audio) {
 107                 audio->set_stream (
 108                         make_shared<AudioStream> (
 109                                 node->number_child<int> ("AudioFrameRate"),
 110                                 /* AudioLength was not present in some old metadata versions */
 111                                 node->optional_number_child<Frame>("AudioLength").get_value_or (
 112                                         video->length() * node->number_child<int>("AudioFrameRate") / video_frame_rate().get()
 113                                         ),
 114                                 AudioMapping (node->node_child ("AudioMapping"), version)
 115                                 )
 116                         );
 117         }
 118
 119         _name = node->string_child ("Name");
 120         _encrypted = node->bool_child ("Encrypted");
 121         _needs_assets = node->optional_bool_child("NeedsAssets").get_value_or (false);
 122         if (node->optional_node_child ("KDM")) {
 123                 _kdm = dcp::EncryptedKDM (node->string_child ("KDM"));
 124         }
 125         _kdm_valid = node->bool_child ("KDMValid");
 126         _reference_video = node->optional_bool_child ("ReferenceVideo").get_value_or (false);
 127         _reference_audio = node->optional_bool_child ("ReferenceAudio").get_value_or (false);
 128         if (version >= 37) {
 129                 _reference_text[static_cast<int>(TextType::OPEN_SUBTITLE)] = node->optional_bool_child("ReferenceOpenSubtitle").get_value_or(false);
 130                 _reference_text[static_cast<int>(TextType::CLOSED_CAPTION)] = node->optional_bool_child("ReferenceClosedCaption").get_value_or(false);
 131         } else {
 132                 _reference_text[static_cast<int>(TextType::OPEN_SUBTITLE)] = node->optional_bool_child("ReferenceSubtitle").get_value_or(false);
 133                 _reference_text[static_cast<int>(TextType::CLOSED_CAPTION)] = false;
 134         }
 135         if (node->optional_string_child("Standard")) {
 136                 auto const s = node->optional_string_child("Standard").get();
 137                 if (s == "Interop") {
 138                         _standard = dcp::Standard::INTEROP;
 139                 } else if (s == "SMPTE") {
 140                         _standard = dcp::Standard::SMPTE;
 141                 } else {
 142                         DCPOMATIC_ASSERT (false);
 143                 }
 144         }
 145         _three_d = node->optional_bool_child("ThreeD").get_value_or (false);
 146
 147         auto ck = node->optional_string_child("ContentKind");
 148         if (ck) {
 149                 _content_kind = dcp::content_kind_from_string (*ck);
 150         }
 151         _cpl = node->optional_string_child("CPL");
 152         for (auto i: node->node_children("ReelLength")) {
 153                 _reel_lengths.push_back (raw_convert<int64_t> (i->content ()));
 154         }
 155
 156         for (auto i: node->node_children("Marker")) {
 157                 _markers[dcp::marker_from_string(i->string_attribute("type"))] = ContentTime(raw_convert<int64_t>(i->content()));
 158         }
 159
 160         for (auto i: node->node_children("Rating")) {
 161                 _ratings.push_back (dcp::Rating(i));
 162         }
 163
 164         for (auto i: node->node_children("ContentVersion")) {
 165                 _content_versions.push_back (i->content());
 166         }
 167 }
 168
 169 void
 170 DCPContent::read_directory (boost::filesystem::path p)
 171 {
 172         using namespace boost::filesystem;
 173
 174         bool have_assetmap = false;
 175         bool have_metadata = false;
 176
 177         for (directory_iterator i(p); i != directory_iterator(); ++i) {
 178                 if (i->path().filename() == "ASSETMAP" || i->path().filename() == "ASSETMAP.xml") {
 179                         have_assetmap = true;
 180                 } else if (i->path().filename() == "metadata.xml") {
 181                         have_metadata = true;
 182                 }
 183         }
 184
 185         if (!have_assetmap) {
 186                 if (!have_metadata) {
 187                         throw DCPError ("No ASSETMAP or ASSETMAP.xml file found: is this a DCP?");
 188                 } else {
 189                         throw ProjectFolderError ();
 190                 }
 191         }
 192
 193         read_sub_directory (p);
 194 }
 195
 196 void
 197 DCPContent::read_sub_directory (boost::filesystem::path p)
 198 {
 199         LOG_GENERAL ("DCPContent::read_sub_directory reads %1", p.string());
 200         for (auto i: boost::filesystem::directory_iterator(p)) {
 201                 if (boost::filesystem::is_regular_file(i.path())) {
 202                         LOG_GENERAL ("Inside there's regular file %1", i.path().string());
 203                         add_path (i.path());
 204                 } else if (boost::filesystem::is_directory (i.path())) {
 205                         LOG_GENERAL ("Inside there's directory %1", i.path().string());
 206                         read_sub_directory (i.path());
 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         ContentChangeSignaller cc_texts (this, DCPContentProperty::TEXTS);
 220         ContentChangeSignaller cc_assets (this, DCPContentProperty::NEEDS_ASSETS);
 221         ContentChangeSignaller cc_kdm (this, DCPContentProperty::NEEDS_KDM);
 222         ContentChangeSignaller cc_name (this, DCPContentProperty::NAME);
 223
 224         if (job) {
 225                 job->set_progress_unknown ();
 226         }
 227         Content::examine (film, job);
 228
 229         auto examiner = make_shared<DCPExaminer>(shared_from_this(), film ? film->tolerant() : true);
 230
 231         if (examiner->has_video()) {
 232                 {
 233                         boost::mutex::scoped_lock lm (_mutex);
 234                         video = make_shared<VideoContent>(this);
 235                 }
 236                 video->take_from_examiner (examiner);
 237                 set_default_colour_conversion ();
 238         }
 239
 240         if (examiner->has_audio()) {
 241                 {
 242                         boost::mutex::scoped_lock lm (_mutex);
 243                         audio = make_shared<AudioContent>(this);
 244                 }
 245                 auto as = make_shared<AudioStream>(examiner->audio_frame_rate(), examiner->audio_length(), examiner->audio_channels());
 246                 audio->set_stream (as);
 247                 auto m = as->mapping ();
 248                 m.make_default (film ? film->audio_processor() : 0);
 249                 as->set_mapping (m);
 250         }
 251
 252         if (examiner->has_atmos()) {
 253                 {
 254                         boost::mutex::scoped_lock lm (_mutex);
 255                         atmos = make_shared<AtmosContent>(this);
 256                 }
 257                 /* Setting length will cause calculations to be made based on edit rate, so that must
 258                  * be set up first otherwise hard-to-spot exceptions will be thrown.
 259                  */
 260                 atmos->set_edit_rate (examiner->atmos_edit_rate());
 261                 atmos->set_length (examiner->atmos_length());
 262         }
 263
 264         list<shared_ptr<TextContent>> new_text;
 265
 266         for (int i = 0; i < examiner->text_count(TextType::OPEN_SUBTITLE); ++i) {
 267                 auto c = make_shared<TextContent>(this, TextType::OPEN_SUBTITLE, TextType::OPEN_SUBTITLE);
 268                 c->set_language (examiner->open_subtitle_language());
 269                 new_text.push_back (c);
 270         }
 271
 272         for (int i = 0; i < examiner->text_count(TextType::CLOSED_CAPTION); ++i) {
 273                 auto c = make_shared<TextContent>(this, TextType::CLOSED_CAPTION, TextType::CLOSED_CAPTION);
 274                 c->set_dcp_track (examiner->dcp_text_track(i));
 275                 new_text.push_back (c);
 276         }
 277
 278         {
 279                 boost::mutex::scoped_lock lm (_mutex);
 280                 text = new_text;
 281                 _name = examiner->name ();
 282                 _encrypted = examiner->encrypted ();
 283                 _needs_assets = examiner->needs_assets ();
 284                 _kdm_valid = examiner->kdm_valid ();
 285                 _standard = examiner->standard ();
 286                 _three_d = examiner->three_d ();
 287                 _content_kind = examiner->content_kind ();
 288                 _cpl = examiner->cpl ();
 289                 _reel_lengths = examiner->reel_lengths ();
 290                 for (auto const& i: examiner->markers()) {
 291                         _markers[i.first] = ContentTime(i.second.as_editable_units_ceil(DCPTime::HZ));
 292                 }
 293                 _ratings = examiner->ratings ();
 294                 _content_versions = examiner->content_versions ();
 295         }
 296
 297         if (needed_assets == needs_assets()) {
 298                 cc_assets.abort ();
 299         }
 300
 301         if (needed_kdm == needs_kdm()) {
 302                 cc_kdm.abort ();
 303         }
 304
 305         if (old_name == name()) {
 306                 cc_name.abort ();
 307         }
 308
 309         if (video) {
 310                 video->set_frame_type (_three_d ? VideoFrameType::THREE_D : VideoFrameType::TWO_D);
 311         }
 312 }
 313
 314 string
 315 DCPContent::summary () const
 316 {
 317         boost::mutex::scoped_lock lm (_mutex);
 318         return String::compose (_("%1 [DCP]"), _name);
 319 }
 320
 321 string
 322 DCPContent::technical_summary () const
 323 {
 324         string s = Content::technical_summary() + " - ";
 325         if (video) {
 326                 s += video->technical_summary() + " - ";
 327         }
 328         if (audio) {
 329                 s += audio->technical_summary() + " - ";
 330         }
 331         return s;
 332 }
 333
 334 void
 335 DCPContent::as_xml (xmlpp::Node* node, bool with_paths) const
 336 {
 337         node->add_child("Type")->add_child_text ("DCP");
 338
 339         Content::as_xml (node, with_paths);
 340
 341         if (video) {
 342                 video->as_xml (node);
 343         }
 344
 345         if (audio) {
 346                 audio->as_xml (node);
 347                 node->add_child("AudioFrameRate")->add_child_text (raw_convert<string> (audio->stream()->frame_rate()));
 348                 node->add_child("AudioLength")->add_child_text (raw_convert<string> (audio->stream()->length()));
 349                 audio->stream()->mapping().as_xml (node->add_child("AudioMapping"));
 350         }
 351
 352         for (auto i: text) {
 353                 i->as_xml (node);
 354         }
 355
 356         if (atmos) {
 357                 atmos->as_xml (node);
 358         }
 359
 360         boost::mutex::scoped_lock lm (_mutex);
 361         node->add_child("Name")->add_child_text (_name);
 362         node->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
 363         node->add_child("NeedsAssets")->add_child_text (_needs_assets ? "1" : "0");
 364         if (_kdm) {
 365                 node->add_child("KDM")->add_child_text (_kdm->as_xml ());
 366         }
 367         node->add_child("KDMValid")->add_child_text (_kdm_valid ? "1" : "0");
 368         node->add_child("ReferenceVideo")->add_child_text (_reference_video ? "1" : "0");
 369         node->add_child("ReferenceAudio")->add_child_text (_reference_audio ? "1" : "0");
 370         node->add_child("ReferenceOpenSubtitle")->add_child_text(_reference_text[static_cast<int>(TextType::OPEN_SUBTITLE)] ? "1" : "0");
 371         node->add_child("ReferenceClosedCaption")->add_child_text(_reference_text[static_cast<int>(TextType::CLOSED_CAPTION)] ? "1" : "0");
 372         if (_standard) {
 373                 switch (_standard.get ()) {
 374                 case dcp::Standard::INTEROP:
 375                         node->add_child("Standard")->add_child_text ("Interop");
 376                         break;
 377                 case dcp::Standard::SMPTE:
 378                         node->add_child("Standard")->add_child_text ("SMPTE");
 379                         break;
 380                 default:
 381                         DCPOMATIC_ASSERT (false);
 382                 }
 383         }
 384         node->add_child("ThreeD")->add_child_text (_three_d ? "1" : "0");
 385         if (_content_kind) {
 386                 node->add_child("ContentKind")->add_child_text(dcp::content_kind_to_string(*_content_kind));
 387         }
 388         if (_cpl) {
 389                 node->add_child("CPL")->add_child_text (_cpl.get ());
 390         }
 391         for (auto i: _reel_lengths) {
 392                 node->add_child("ReelLength")->add_child_text (raw_convert<string> (i));
 393         }
 394
 395         for (auto const& i: _markers) {
 396                 auto marker = node->add_child("Marker");
 397                 marker->set_attribute("type", dcp::marker_to_string(i.first));
 398                 marker->add_child_text(raw_convert<string>(i.second.get()));
 399         }
 400
 401         for (auto i: _ratings) {
 402                 auto rating = node->add_child("Rating");
 403                 i.as_xml (rating);
 404         }
 405
 406         for (auto i: _content_versions) {
 407                 node->add_child("ContentVersion")->add_child_text(i);
 408         }
 409 }
 410
 411 DCPTime
 412 DCPContent::full_length (shared_ptr<const Film> film) const
 413 {
 414         if (!video) {
 415                 return {};
 416         }
 417         FrameRateChange const frc (film, shared_from_this());
 418         return DCPTime::from_frames (llrint(video->length() * frc.factor()), film->video_frame_rate());
 419 }
 420
 421 DCPTime
 422 DCPContent::approximate_length () const
 423 {
 424         if (!video) {
 425                 return {};
 426         }
 427         return DCPTime::from_frames (video->length(), 24);
 428 }
 429
 430 string
 431 DCPContent::identifier () const
 432 {
 433         string s = Content::identifier() + "_";
 434
 435         if (video) {
 436                 s += video->identifier() + "_";
 437         }
 438
 439         for (auto i: text) {
 440                 s += i->identifier () + " ";
 441         }
 442
 443         s += string (_reference_video ? "1" : "0");
 444         for (int i = 0; i < static_cast<int>(TextType::COUNT); ++i) {
 445                 s += string (_reference_text[i] ? "1" : "0");
 446         }
 447         return s;
 448 }
 449
 450 void
 451 DCPContent::add_kdm (dcp::EncryptedKDM k)
 452 {
 453         _kdm = k;
 454 }
 455
 456 void
 457 DCPContent::add_ov (boost::filesystem::path ov)
 458 {
 459         read_directory (ov);
 460 }
 461
 462 bool
 463 DCPContent::can_be_played () const
 464 {
 465         return !needs_kdm() && !needs_assets();
 466 }
 467
 468 bool
 469 DCPContent::needs_kdm () const
 470 {
 471         boost::mutex::scoped_lock lm (_mutex);
 472         return _encrypted && !_kdm_valid;
 473 }
 474
 475 bool
 476 DCPContent::needs_assets () const
 477 {
 478         boost::mutex::scoped_lock lm (_mutex);
 479         return _needs_assets;
 480 }
 481
 482 vector<boost::filesystem::path>
 483 DCPContent::directories () const
 484 {
 485         return dcp::DCP::directories_from_files (paths());
 486 }
 487
 488 void
 489 DCPContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 490 {
 491         Content::add_properties (film, p);
 492         if (video) {
 493                 video->add_properties (p);
 494         }
 495         if (audio) {
 496                 audio->add_properties (film, p);
 497         }
 498 }
 499
 500 void
 501 DCPContent::set_default_colour_conversion ()
 502 {
 503         /* Default to no colour conversion for DCPs */
 504         if (video) {
 505                 video->unset_colour_conversion ();
 506         }
 507 }
 508
 509 void
 510 DCPContent::set_reference_video (bool r)
 511 {
 512         ContentChangeSignaller cc (this, DCPContentProperty::REFERENCE_VIDEO);
 513
 514         {
 515                 boost::mutex::scoped_lock lm (_mutex);
 516                 _reference_video = r;
 517         }
 518 }
 519
 520 void
 521 DCPContent::set_reference_audio (bool r)
 522 {
 523         ContentChangeSignaller cc (this, DCPContentProperty::REFERENCE_AUDIO);
 524
 525         {
 526                 boost::mutex::scoped_lock lm (_mutex);
 527                 _reference_audio = r;
 528         }
 529 }
 530
 531 void
 532 DCPContent::set_reference_text (TextType type, bool r)
 533 {
 534         ContentChangeSignaller cc (this, DCPContentProperty::REFERENCE_TEXT);
 535
 536         {
 537                 boost::mutex::scoped_lock lm (_mutex);
 538                 _reference_text[static_cast<int>(type)] = r;
 539         }
 540 }
 541
 542 list<DCPTimePeriod>
 543 DCPContent::reels (shared_ptr<const Film> film) const
 544 {
 545         auto reel_lengths = _reel_lengths;
 546         if (reel_lengths.empty()) {
 547                 /* Old metadata with no reel lengths; get them here instead */
 548                 try {
 549                         scoped_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film->tolerant()));
 550                         reel_lengths = examiner->reel_lengths ();
 551                 } catch (...) {
 552                         /* Could not examine the DCP; guess reels */
 553                         reel_lengths.push_back (length_after_trim(film).frames_round(film->video_frame_rate()));
 554                 }
 555         }
 556
 557         list<DCPTimePeriod> p;
 558
 559         /* This content's frame rate must be the same as the output DCP rate, so we can
 560            convert `directly' from ContentTime to DCPTime.
 561         */
 562
 563         /* The starting point of this content on the timeline */
 564         auto pos = position() - DCPTime (trim_start().get());
 565
 566         for (auto i: reel_lengths) {
 567                 /* This reel runs from `pos' to `to' */
 568                 DCPTime const to = pos + DCPTime::from_frames (i, film->video_frame_rate());
 569                 if (to > position()) {
 570                         p.push_back (DCPTimePeriod(max(position(), pos), min(end(film), to)));
 571                         if (to > end(film)) {
 572                                 break;
 573                         }
 574                 }
 575                 pos = to;
 576         }
 577
 578         return p;
 579 }
 580
 581 list<DCPTime>
 582 DCPContent::reel_split_points (shared_ptr<const Film> film) const
 583 {
 584         list<DCPTime> s;
 585         for (auto i: reels(film)) {
 586                 s.push_back (i.from);
 587         }
 588         return s;
 589 }
 590
 591 bool
 592 DCPContent::can_reference (shared_ptr<const Film> film, function<bool (shared_ptr<const Content>)> part, string overlapping, string& why_not) const
 593 {
 594         /* We must be using the same standard as the film */
 595         if (_standard) {
 596                 if (_standard.get() == dcp::Standard::INTEROP && !film->interop()) {
 597                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 598                         why_not = _("it is Interop and the film is set to SMPTE.");
 599                         return false;
 600                 } else if (_standard.get() == dcp::Standard::SMPTE && film->interop()) {
 601                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 602                         why_not = _("it is SMPTE and the film is set to Interop.");
 603                         return false;
 604                 }
 605         }
 606
 607         /* And the same frame rate */
 608         if (!video_frame_rate() || (lrint(video_frame_rate().get()) != film->video_frame_rate())) {
 609                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 610                 why_not = _("it has a different frame rate to the film.");
 611                 return false;
 612         }
 613
 614         auto const fr = film->reels ();
 615
 616         list<DCPTimePeriod> reel_list;
 617         try {
 618                 reel_list = reels (film);
 619         } catch (dcp::ReadError &) {
 620                 /* We couldn't read the DCP; it's probably missing */
 621                 return false;
 622         } catch (dcp::KDMDecryptionError &) {
 623                 /* We have an incorrect KDM */
 624                 return false;
 625         }
 626
 627         /* fr must contain reels().  It can also contain other reels, but it must at
 628            least contain reels().
 629         */
 630         for (auto i: reel_list) {
 631                 if (find (fr.begin(), fr.end(), i) == fr.end ()) {
 632                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 633                         why_not = _("its reel lengths differ from those in the film; set the reel mode to 'split by video content'.");
 634                         return false;
 635                 }
 636         }
 637
 638         auto a = overlaps (film, film->content(), part, position(), end(film));
 639         if (a.size() != 1 || a.front().get() != this) {
 640                 why_not = overlapping;
 641                 return false;
 642         }
 643
 644         return true;
 645 }
 646
 647 static
 648 bool check_video (shared_ptr<const Content> c)
 649 {
 650         return static_cast<bool>(c->video) && c->video->use();
 651 }
 652
 653 bool
 654 DCPContent::can_reference_video (shared_ptr<const Film> film, string& why_not) const
 655 {
 656         if (!video) {
 657                 why_not = _("There is no video in this DCP");
 658                 return false;
 659         }
 660
 661         if (film->resolution() != resolution()) {
 662                 if (resolution() == Resolution::FOUR_K) {
 663                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 664                         why_not = _("it is 4K and the film is 2K.");
 665                 } else {
 666                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 667                         why_not = _("it is 2K and the film is 4K.");
 668                 }
 669                 return false;
 670         } else if (film->frame_size() != video->size()) {
 671                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 672                 why_not = _("its video frame size differs from the film's.");
 673                 return false;
 674         }
 675
 676         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 677         return can_reference (film, bind (&check_video, _1), _("it overlaps other video content; remove the other content."), why_not);
 678 }
 679
 680 static
 681 bool check_audio (shared_ptr<const Content> c)
 682 {
 683         return static_cast<bool>(c->audio) && !c->audio->mapping().mapped_output_channels().empty();
 684 }
 685
 686 bool
 687 DCPContent::can_reference_audio (shared_ptr<const Film> film, string& why_not) const
 688 {
 689         shared_ptr<DCPDecoder> decoder;
 690         try {
 691                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 692         } catch (dcp::ReadError &) {
 693                 /* We couldn't read the DCP, so it's probably missing */
 694                 return false;
 695         } catch (DCPError &) {
 696                 /* We couldn't read the DCP, so it's probably missing */
 697                 return false;
 698         } catch (dcp::KDMDecryptionError &) {
 699                 /* We have an incorrect KDM */
 700                 return false;
 701         }
 702
 703         for (auto i: decoder->reels()) {
 704                 if (!i->main_sound()) {
 705                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 706                         why_not = _("it does not have sound in all its reels.");
 707                         return false;
 708                 }
 709         }
 710
 711         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 712         return can_reference (film, bind (&check_audio, _1), _("it overlaps other audio content; remove the other content."), why_not);
 713 }
 714
 715 static
 716 bool check_text (shared_ptr<const Content> c)
 717 {
 718         return !c->text.empty();
 719 }
 720
 721 bool
 722 DCPContent::can_reference_text (shared_ptr<const Film> film, TextType type, string& why_not) const
 723 {
 724         shared_ptr<DCPDecoder> decoder;
 725         try {
 726                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 727         } catch (dcp::ReadError &) {
 728                 /* We couldn't read the DCP, so it's probably missing */
 729                 return false;
 730         } catch (dcp::KDMDecryptionError &) {
 731                 /* We have an incorrect KDM */
 732                 return false;
 733         }
 734
 735         for (auto i: decoder->reels()) {
 736                 if (type == TextType::OPEN_SUBTITLE) {
 737                         if (!i->main_subtitle()) {
 738                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 739                                 why_not = _("it does not have open subtitles in all its reels.");
 740                                 return false;
 741                         } else if (i->main_subtitle()->entry_point().get_value_or(0) != 0) {
 742                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 743                                 why_not = _("one if its subtitle reels has a non-zero entry point so it must be re-written.");
 744                                 return false;
 745                         }
 746                 }
 747                 if (type == TextType::CLOSED_CAPTION) {
 748                         if (i->closed_captions().empty()) {
 749                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 750                                 why_not = _("it does not have closed captions in all its reels.");
 751                                 return false;
 752                         }
 753                         for (auto j: i->closed_captions()) {
 754                                 if (j->entry_point().get_value_or(0) != 0) {
 755                                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 756                                         why_not = _("one if its closed caption has a non-zero entry point so it must be re-written.");
 757                                         return false;
 758                                 }
 759                         }
 760                 }
 761         }
 762
 763         if (trim_start() != dcpomatic::ContentTime()) {
 764                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 765                 why_not = _("it has a start trim so its subtitles or closed captions must be re-written.");
 766                 return false;
 767         }
 768
 769         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 770         return can_reference (film, bind (&check_text, _1), _("it overlaps other text content; remove the other content."), why_not);
 771 }
 772
 773 void
 774 DCPContent::take_settings_from (shared_ptr<const Content> c)
 775 {
 776         auto dc = dynamic_pointer_cast<const DCPContent>(c);
 777         if (!dc) {
 778                 return;
 779         }
 780
 781         _reference_video = dc->_reference_video;
 782         _reference_audio = dc->_reference_audio;
 783         for (int i = 0; i < static_cast<int>(TextType::COUNT); ++i) {
 784                 _reference_text[i] = dc->_reference_text[i];
 785         }
 786 }
 787
 788 void
 789 DCPContent::set_cpl (string id)
 790 {
 791         ContentChangeSignaller cc (this, DCPContentProperty::CPL);
 792
 793         {
 794                 boost::mutex::scoped_lock lm (_mutex);
 795                 _cpl = id;
 796         }
 797 }
 798
 799 bool
 800 DCPContent::kdm_timing_window_valid () const
 801 {
 802         if (!_kdm) {
 803                 return true;
 804         }
 805
 806         dcp::LocalTime now;
 807         return _kdm->not_valid_before() < now && now < _kdm->not_valid_after();
 808 }
 809
 810
 811 Resolution
 812 DCPContent::resolution () const
 813 {
 814         if (video->size().width > 2048 || video->size().height > 1080) {
 815                 return Resolution::FOUR_K;
 816         }
 817
 818         return Resolution::TWO_K;
 819 }
 820