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_picture_asset.h>
  39 #include <dcp/reel.h>
  40 #include <libxml++/libxml++.h>
  41 #include <boost/foreach.hpp>
  42 #include <iterator>
  43 #include <iostream>
  44
  45 #include "i18n.h"
  46
  47 using std::string;
  48 using std::cout;
  49 using std::distance;
  50 using std::pair;
  51 using std::vector;
  52 using std::list;
  53 using std::map;
  54 using boost::shared_ptr;
  55 using boost::scoped_ptr;
  56 using boost::optional;
  57 using boost::function;
  58 using boost::dynamic_pointer_cast;
  59 #if BOOST_VERSION >= 106100
  60 using namespace boost::placeholders;
  61 #endif
  62 using dcp::raw_convert;
  63 using namespace dcpomatic;
  64
  65 int const DCPContentProperty::NEEDS_ASSETS       = 600;
  66 int const DCPContentProperty::NEEDS_KDM          = 601;
  67 int const DCPContentProperty::REFERENCE_VIDEO    = 602;
  68 int const DCPContentProperty::REFERENCE_AUDIO    = 603;
  69 int const DCPContentProperty::REFERENCE_TEXT     = 604;
  70 int const DCPContentProperty::NAME               = 605;
  71 int const DCPContentProperty::TEXTS              = 606;
  72 int const DCPContentProperty::CPL                = 607;
  73
  74 DCPContent::DCPContent (boost::filesystem::path p)
  75         : _encrypted (false)
  76         , _needs_assets (false)
  77         , _kdm_valid (false)
  78         , _reference_video (false)
  79         , _reference_audio (false)
  80         , _three_d (false)
  81 {
  82         LOG_GENERAL ("Creating DCP content from %1", p.string());
  83
  84         read_directory (p);
  85         set_default_colour_conversion ();
  86
  87         for (int i = 0; i < TEXT_COUNT; ++i) {
  88                 _reference_text[i] = false;
  89         }
  90 }
  91
  92 DCPContent::DCPContent (cxml::ConstNodePtr node, int version)
  93         : Content (node)
  94 {
  95         video = VideoContent::from_xml (this, node, version);
  96         audio = AudioContent::from_xml (this, node, version);
  97         text = TextContent::from_xml (this, node, version);
  98         atmos = AtmosContent::from_xml (this, node);
  99
 100         for (int i = 0; i < TEXT_COUNT; ++i) {
 101                 _reference_text[i] = false;
 102         }
 103
 104         if (video && audio) {
 105                 audio->set_stream (
 106                         AudioStreamPtr (
 107                                 new AudioStream (
 108                                         node->number_child<int> ("AudioFrameRate"),
 109                                         /* AudioLength was not present in some old metadata versions */
 110                                         node->optional_number_child<Frame>("AudioLength").get_value_or (
 111                                                 video->length() * node->number_child<int>("AudioFrameRate") / video_frame_rate().get()
 112                                                 ),
 113                                         AudioMapping (node->node_child ("AudioMapping"), version)
 114                                         )
 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[TEXT_OPEN_SUBTITLE] = node->optional_bool_child("ReferenceOpenSubtitle").get_value_or(false);
 130                 _reference_text[TEXT_CLOSED_CAPTION] = node->optional_bool_child("ReferenceClosedCaption").get_value_or(false);
 131         } else {
 132                 _reference_text[TEXT_OPEN_SUBTITLE] = node->optional_bool_child("ReferenceSubtitle").get_value_or(false);
 133                 _reference_text[TEXT_CLOSED_CAPTION] = false;
 134         }
 135         if (node->optional_string_child("Standard")) {
 136                 string const s = node->optional_string_child("Standard").get();
 137                 if (s == "Interop") {
 138                         _standard = dcp::INTEROP;
 139                 } else if (s == "SMPTE") {
 140                         _standard = dcp::SMPTE;
 141                 } else {
 142                         DCPOMATIC_ASSERT (false);
 143                 }
 144         }
 145         _three_d = node->optional_bool_child("ThreeD").get_value_or (false);
 146
 147         optional<string> 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         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("ReelLength")) {
 153                 _reel_lengths.push_back (raw_convert<int64_t> (i->content ()));
 154         }
 155
 156         BOOST_FOREACH (cxml::ConstNodePtr 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         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("Rating")) {
 161                 _ratings.push_back (dcp::Rating(i));
 162         }
 163
 164         BOOST_FOREACH (cxml::ConstNodePtr 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         read_sub_directory (p);
 173
 174         bool have_assetmap = false;
 175         BOOST_FOREACH (boost::filesystem::path i, paths()) {
 176                 if (i.filename() == "ASSETMAP" || i.filename() == "ASSETMAP.xml") {
 177                         have_assetmap = true;
 178                 }
 179         }
 180
 181         if (!have_assetmap) {
 182                 throw DCPError ("No ASSETMAP or ASSETMAP.xml file found: is this a DCP?");
 183         }
 184 }
 185
 186 void
 187 DCPContent::read_sub_directory (boost::filesystem::path p)
 188 {
 189         LOG_GENERAL ("DCPContent::read_sub_directory reads %1", p.string());
 190         for (boost::filesystem::directory_iterator i(p); i != boost::filesystem::directory_iterator(); ++i) {
 191                 if (boost::filesystem::is_regular_file (i->path())) {
 192                         LOG_GENERAL ("Inside there's regular file %1", i->path().string());
 193                         add_path (i->path());
 194                 } else if (boost::filesystem::is_directory (i->path ())) {
 195                         LOG_GENERAL ("Inside there's directory %1", i->path().string());
 196                         read_sub_directory (i->path());
 197                 }
 198         }
 199 }
 200
 201 /** @param film Film, or 0 */
 202 void
 203 DCPContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
 204 {
 205         bool const needed_assets = needs_assets ();
 206         bool const needed_kdm = needs_kdm ();
 207         string const old_name = name ();
 208
 209         ChangeSignaller<Content> cc_texts (this, DCPContentProperty::TEXTS);
 210         ChangeSignaller<Content> cc_assets (this, DCPContentProperty::NEEDS_ASSETS);
 211         ChangeSignaller<Content> cc_kdm (this, DCPContentProperty::NEEDS_KDM);
 212         ChangeSignaller<Content> cc_name (this, DCPContentProperty::NAME);
 213
 214         if (job) {
 215                 job->set_progress_unknown ();
 216         }
 217         Content::examine (film, job);
 218
 219         shared_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film ? film->tolerant() : true));
 220
 221         if (examiner->has_video()) {
 222                 {
 223                         boost::mutex::scoped_lock lm (_mutex);
 224                         video.reset (new VideoContent (this));
 225                 }
 226                 video->take_from_examiner (examiner);
 227                 set_default_colour_conversion ();
 228         }
 229
 230         if (examiner->has_audio()) {
 231                 {
 232                         boost::mutex::scoped_lock lm (_mutex);
 233                         audio.reset (new AudioContent (this));
 234                 }
 235                 AudioStreamPtr as (new AudioStream (examiner->audio_frame_rate(), examiner->audio_length(), examiner->audio_channels()));
 236                 audio->set_stream (as);
 237                 AudioMapping m = as->mapping ();
 238                 m.make_default (film ? film->audio_processor() : 0);
 239                 as->set_mapping (m);
 240         }
 241
 242         if (examiner->has_atmos()) {
 243                 {
 244                         boost::mutex::scoped_lock lm (_mutex);
 245                         atmos.reset (new AtmosContent(this));
 246                 }
 247                 /* Setting length will cause calculations to be made based on edit rate, so that must
 248                  * be set up first otherwise hard-to-spot exceptions will be thrown.
 249                  */
 250                 atmos->set_edit_rate (examiner->atmos_edit_rate());
 251                 atmos->set_length (examiner->atmos_length());
 252         }
 253
 254         list<shared_ptr<TextContent> > new_text;
 255         for (int i = 0; i < TEXT_COUNT; ++i) {
 256                 for (int j = 0; j < examiner->text_count(static_cast<TextType>(i)); ++j) {
 257                         shared_ptr<TextContent> c(new TextContent(this, static_cast<TextType>(i), static_cast<TextType>(i)));
 258                         if (i == TEXT_CLOSED_CAPTION) {
 259                                 c->set_dcp_track (examiner->dcp_text_track(j));
 260                         }
 261                         new_text.push_back (c);
 262                 }
 263         }
 264
 265         {
 266                 boost::mutex::scoped_lock lm (_mutex);
 267                 text = new_text;
 268                 _name = examiner->name ();
 269                 _encrypted = examiner->encrypted ();
 270                 _needs_assets = examiner->needs_assets ();
 271                 _kdm_valid = examiner->kdm_valid ();
 272                 _standard = examiner->standard ();
 273                 _three_d = examiner->three_d ();
 274                 _content_kind = examiner->content_kind ();
 275                 _cpl = examiner->cpl ();
 276                 _reel_lengths = examiner->reel_lengths ();
 277                 map<dcp::Marker, dcp::Time> markers = examiner->markers();
 278                 for (map<dcp::Marker, dcp::Time>::const_iterator i = markers.begin(); i != markers.end(); ++i) {
 279                         _markers[i->first] = ContentTime(i->second.as_editable_units(DCPTime::HZ));
 280                 }
 281                 _ratings = examiner->ratings ();
 282                 _content_versions = examiner->content_versions ();
 283         }
 284
 285         if (needed_assets == needs_assets()) {
 286                 cc_assets.abort ();
 287         }
 288
 289         if (needed_kdm == needs_kdm()) {
 290                 cc_kdm.abort ();
 291         }
 292
 293         if (old_name == name()) {
 294                 cc_name.abort ();
 295         }
 296
 297         if (video) {
 298                 video->set_frame_type (_three_d ? VIDEO_FRAME_TYPE_3D : VIDEO_FRAME_TYPE_2D);
 299         }
 300 }
 301
 302 string
 303 DCPContent::summary () const
 304 {
 305         boost::mutex::scoped_lock lm (_mutex);
 306         return String::compose (_("%1 [DCP]"), _name);
 307 }
 308
 309 string
 310 DCPContent::technical_summary () const
 311 {
 312         string s = Content::technical_summary() + " - ";
 313         if (video) {
 314                 s += video->technical_summary() + " - ";
 315         }
 316         if (audio) {
 317                 s += audio->technical_summary() + " - ";
 318         }
 319         return s;
 320 }
 321
 322 void
 323 DCPContent::as_xml (xmlpp::Node* node, bool with_paths) const
 324 {
 325         node->add_child("Type")->add_child_text ("DCP");
 326
 327         Content::as_xml (node, with_paths);
 328
 329         if (video) {
 330                 video->as_xml (node);
 331         }
 332
 333         if (audio) {
 334                 audio->as_xml (node);
 335                 node->add_child("AudioFrameRate")->add_child_text (raw_convert<string> (audio->stream()->frame_rate()));
 336                 node->add_child("AudioLength")->add_child_text (raw_convert<string> (audio->stream()->length()));
 337                 audio->stream()->mapping().as_xml (node->add_child("AudioMapping"));
 338         }
 339
 340         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 341                 i->as_xml (node);
 342         }
 343
 344         if (atmos) {
 345                 atmos->as_xml (node);
 346         }
 347
 348         boost::mutex::scoped_lock lm (_mutex);
 349         node->add_child("Name")->add_child_text (_name);
 350         node->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
 351         node->add_child("NeedsAssets")->add_child_text (_needs_assets ? "1" : "0");
 352         if (_kdm) {
 353                 node->add_child("KDM")->add_child_text (_kdm->as_xml ());
 354         }
 355         node->add_child("KDMValid")->add_child_text (_kdm_valid ? "1" : "0");
 356         node->add_child("ReferenceVideo")->add_child_text (_reference_video ? "1" : "0");
 357         node->add_child("ReferenceAudio")->add_child_text (_reference_audio ? "1" : "0");
 358         node->add_child("ReferenceOpenSubtitle")->add_child_text(_reference_text[TEXT_OPEN_SUBTITLE] ? "1" : "0");
 359         node->add_child("ReferenceClosedCaption")->add_child_text(_reference_text[TEXT_CLOSED_CAPTION] ? "1" : "0");
 360         if (_standard) {
 361                 switch (_standard.get ()) {
 362                 case dcp::INTEROP:
 363                         node->add_child("Standard")->add_child_text ("Interop");
 364                         break;
 365                 case dcp::SMPTE:
 366                         node->add_child("Standard")->add_child_text ("SMPTE");
 367                         break;
 368                 default:
 369                         DCPOMATIC_ASSERT (false);
 370                 }
 371         }
 372         node->add_child("ThreeD")->add_child_text (_three_d ? "1" : "0");
 373         if (_content_kind) {
 374                 node->add_child("ContentKind")->add_child_text(dcp::content_kind_to_string(*_content_kind));
 375         }
 376         if (_cpl) {
 377                 node->add_child("CPL")->add_child_text (_cpl.get ());
 378         }
 379         BOOST_FOREACH (int64_t i, _reel_lengths) {
 380                 node->add_child("ReelLength")->add_child_text (raw_convert<string> (i));
 381         }
 382
 383         for (map<dcp::Marker, ContentTime>::const_iterator i = _markers.begin(); i != _markers.end(); ++i) {
 384                 xmlpp::Element* marker = node->add_child("Marker");
 385                 marker->set_attribute("type", dcp::marker_to_string(i->first));
 386                 marker->add_child_text(raw_convert<string>(i->second.get()));
 387         }
 388
 389         BOOST_FOREACH (dcp::Rating i, _ratings) {
 390                 xmlpp::Element* rating = node->add_child("Rating");
 391                 i.as_xml (rating);
 392         }
 393
 394         BOOST_FOREACH (string i, _content_versions) {
 395                 node->add_child("ContentVersion")->add_child_text(i);
 396         }
 397 }
 398
 399 DCPTime
 400 DCPContent::full_length (shared_ptr<const Film> film) const
 401 {
 402         if (!video) {
 403                 return DCPTime();
 404         }
 405         FrameRateChange const frc (film, shared_from_this());
 406         return DCPTime::from_frames (llrint(video->length() * frc.factor()), film->video_frame_rate());
 407 }
 408
 409 DCPTime
 410 DCPContent::approximate_length () const
 411 {
 412         if (!video) {
 413                 return DCPTime();
 414         }
 415         return DCPTime::from_frames (video->length(), 24);
 416 }
 417
 418 string
 419 DCPContent::identifier () const
 420 {
 421         string s = Content::identifier() + "_";
 422
 423         if (video) {
 424                 s += video->identifier() + "_";
 425         }
 426
 427         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 428                 s += i->identifier () + " ";
 429         }
 430
 431         s += string (_reference_video ? "1" : "0");
 432         for (int i = 0; i < TEXT_COUNT; ++i) {
 433                 s += string (_reference_text[i] ? "1" : "0");
 434         }
 435         return s;
 436 }
 437
 438 void
 439 DCPContent::add_kdm (dcp::EncryptedKDM k)
 440 {
 441         _kdm = k;
 442 }
 443
 444 void
 445 DCPContent::add_ov (boost::filesystem::path ov)
 446 {
 447         read_directory (ov);
 448 }
 449
 450 bool
 451 DCPContent::can_be_played () const
 452 {
 453         return !needs_kdm() && !needs_assets();
 454 }
 455
 456 bool
 457 DCPContent::needs_kdm () const
 458 {
 459         boost::mutex::scoped_lock lm (_mutex);
 460         return _encrypted && !_kdm_valid;
 461 }
 462
 463 bool
 464 DCPContent::needs_assets () const
 465 {
 466         boost::mutex::scoped_lock lm (_mutex);
 467         return _needs_assets;
 468 }
 469
 470 vector<boost::filesystem::path>
 471 DCPContent::directories () const
 472 {
 473         return dcp::DCP::directories_from_files (paths());
 474 }
 475
 476 void
 477 DCPContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 478 {
 479         Content::add_properties (film, p);
 480         if (video) {
 481                 video->add_properties (p);
 482         }
 483         if (audio) {
 484                 audio->add_properties (film, p);
 485         }
 486 }
 487
 488 void
 489 DCPContent::set_default_colour_conversion ()
 490 {
 491         /* Default to no colour conversion for DCPs */
 492         if (video) {
 493                 video->unset_colour_conversion ();
 494         }
 495 }
 496
 497 void
 498 DCPContent::set_reference_video (bool r)
 499 {
 500         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_VIDEO);
 501
 502         {
 503                 boost::mutex::scoped_lock lm (_mutex);
 504                 _reference_video = r;
 505         }
 506 }
 507
 508 void
 509 DCPContent::set_reference_audio (bool r)
 510 {
 511         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_AUDIO);
 512
 513         {
 514                 boost::mutex::scoped_lock lm (_mutex);
 515                 _reference_audio = r;
 516         }
 517 }
 518
 519 void
 520 DCPContent::set_reference_text (TextType type, bool r)
 521 {
 522         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_TEXT);
 523
 524         {
 525                 boost::mutex::scoped_lock lm (_mutex);
 526                 _reference_text[type] = r;
 527         }
 528 }
 529
 530 list<DCPTimePeriod>
 531 DCPContent::reels (shared_ptr<const Film> film) const
 532 {
 533         list<int64_t> reel_lengths = _reel_lengths;
 534         if (reel_lengths.empty ()) {
 535                 /* Old metadata with no reel lengths; get them here instead */
 536                 try {
 537                         scoped_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film->tolerant()));
 538                         reel_lengths = examiner->reel_lengths ();
 539                 } catch (...) {
 540                         /* Could not examine the DCP; guess reels */
 541                         reel_lengths.push_back (length_after_trim(film).frames_round(film->video_frame_rate()));
 542                 }
 543         }
 544
 545         list<DCPTimePeriod> p;
 546
 547         /* This content's frame rate must be the same as the output DCP rate, so we can
 548            convert `directly' from ContentTime to DCPTime.
 549         */
 550
 551         /* The starting point of this content on the timeline */
 552         DCPTime pos = position() - DCPTime (trim_start().get());
 553
 554         BOOST_FOREACH (int64_t i, reel_lengths) {
 555                 /* This reel runs from `pos' to `to' */
 556                 DCPTime const to = pos + DCPTime::from_frames (i, film->video_frame_rate());
 557                 if (to > position()) {
 558                         p.push_back (DCPTimePeriod (max(position(), pos), min(end(film), to)));
 559                         if (to > end(film)) {
 560                                 break;
 561                         }
 562                 }
 563                 pos = to;
 564         }
 565
 566         return p;
 567 }
 568
 569 list<DCPTime>
 570 DCPContent::reel_split_points (shared_ptr<const Film> film) const
 571 {
 572         list<DCPTime> s;
 573         BOOST_FOREACH (DCPTimePeriod i, reels(film)) {
 574                 s.push_back (i.from);
 575         }
 576         return s;
 577 }
 578
 579 bool
 580 DCPContent::can_reference (shared_ptr<const Film> film, function<bool (shared_ptr<const Content>)> part, string overlapping, string& why_not) const
 581 {
 582         /* We must be using the same standard as the film */
 583         if (_standard) {
 584                 if (_standard.get() == dcp::INTEROP && !film->interop()) {
 585                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 586                         why_not = _("it is Interop and the film is set to SMPTE.");
 587                         return false;
 588                 } else if (_standard.get() == dcp::SMPTE && film->interop()) {
 589                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 590                         why_not = _("it is SMPTE and the film is set to Interop.");
 591                         return false;
 592                 }
 593         }
 594
 595         /* And the same frame rate */
 596         if (!video_frame_rate() || (lrint(video_frame_rate().get()) != film->video_frame_rate())) {
 597                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 598                 why_not = _("it has a different frame rate to the film.");
 599                 return false;
 600         }
 601
 602         list<DCPTimePeriod> const fr = film->reels ();
 603
 604         list<DCPTimePeriod> reel_list;
 605         try {
 606                 reel_list = reels (film);
 607         } catch (dcp::ReadError &) {
 608                 /* We couldn't read the DCP; it's probably missing */
 609                 return false;
 610         } catch (dcp::KDMDecryptionError &) {
 611                 /* We have an incorrect KDM */
 612                 return false;
 613         }
 614
 615         /* fr must contain reels().  It can also contain other reels, but it must at
 616            least contain reels().
 617         */
 618         BOOST_FOREACH (DCPTimePeriod i, reel_list) {
 619                 if (find (fr.begin(), fr.end(), i) == fr.end ()) {
 620                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 621                         why_not = _("its reel lengths differ from those in the film; set the reel mode to 'split by video content'.");
 622                         return false;
 623                 }
 624         }
 625
 626         ContentList a = overlaps (film, film->content(), part, position(), end(film));
 627         if (a.size() != 1 || a.front().get() != this) {
 628                 why_not = overlapping;
 629                 return false;
 630         }
 631
 632         return true;
 633 }
 634
 635 static
 636 bool check_video (shared_ptr<const Content> c)
 637 {
 638         return static_cast<bool>(c->video) && c->video->use();
 639 }
 640
 641 bool
 642 DCPContent::can_reference_video (shared_ptr<const Film> film, string& why_not) const
 643 {
 644         if (!video) {
 645                 why_not = _("There is no video in this DCP");
 646                 return false;
 647         }
 648
 649         if (film->resolution() != resolution()) {
 650                 if (resolution() == RESOLUTION_4K) {
 651                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 652                         why_not = _("it is 4K and the film is 2K.");
 653                 } else {
 654                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 655                         why_not = _("it is 2K and the film is 4K.");
 656                 }
 657                 return false;
 658         } else if (film->frame_size() != video->size()) {
 659                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 660                 why_not = _("its video frame size differs from the film's.");
 661                 return false;
 662         }
 663
 664         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 665         return can_reference (film, bind (&check_video, _1), _("it overlaps other video content; remove the other content."), why_not);
 666 }
 667
 668 static
 669 bool check_audio (shared_ptr<const Content> c)
 670 {
 671         return static_cast<bool>(c->audio) && !c->audio->mapping().mapped_output_channels().empty();
 672 }
 673
 674 bool
 675 DCPContent::can_reference_audio (shared_ptr<const Film> film, string& why_not) const
 676 {
 677         shared_ptr<DCPDecoder> decoder;
 678         try {
 679                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 680         } catch (dcp::ReadError &) {
 681                 /* We couldn't read the DCP, so it's probably missing */
 682                 return false;
 683         } catch (DCPError &) {
 684                 /* We couldn't read the DCP, so it's probably missing */
 685                 return false;
 686         } catch (dcp::KDMDecryptionError &) {
 687                 /* We have an incorrect KDM */
 688                 return false;
 689         }
 690
 691         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 692                 if (!i->main_sound()) {
 693                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 694                         why_not = _("it does not have sound in all its reels.");
 695                         return false;
 696                 }
 697         }
 698
 699         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 700         return can_reference (film, bind (&check_audio, _1), _("it overlaps other audio content; remove the other content."), why_not);
 701 }
 702
 703 static
 704 bool check_text (shared_ptr<const Content> c)
 705 {
 706         return !c->text.empty();
 707 }
 708
 709 bool
 710 DCPContent::can_reference_text (shared_ptr<const Film> film, TextType type, string& why_not) const
 711 {
 712         shared_ptr<DCPDecoder> decoder;
 713         try {
 714                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 715         } catch (dcp::ReadError &) {
 716                 /* We couldn't read the DCP, so it's probably missing */
 717                 return false;
 718         } catch (dcp::KDMDecryptionError &) {
 719                 /* We have an incorrect KDM */
 720                 return false;
 721         }
 722
 723         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 724                 if (type == TEXT_OPEN_SUBTITLE && !i->main_subtitle()) {
 725                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 726                         why_not = _("it does not have open subtitles in all its reels.");
 727                         return false;
 728                 }
 729                 if (type == TEXT_CLOSED_CAPTION && i->closed_captions().empty()) {
 730                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 731                         why_not = _("it does not have closed captions in all its reels.");
 732                         return false;
 733                 }
 734         }
 735
 736         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 737         return can_reference (film, bind (&check_text, _1), _("it overlaps other text content; remove the other content."), why_not);
 738 }
 739
 740 void
 741 DCPContent::take_settings_from (shared_ptr<const Content> c)
 742 {
 743         shared_ptr<const DCPContent> dc = dynamic_pointer_cast<const DCPContent> (c);
 744         if (!dc) {
 745                 return;
 746         }
 747
 748         _reference_video = dc->_reference_video;
 749         _reference_audio = dc->_reference_audio;
 750         for (int i = 0; i < TEXT_COUNT; ++i) {
 751                 _reference_text[i] = dc->_reference_text[i];
 752         }
 753 }
 754
 755 void
 756 DCPContent::set_cpl (string id)
 757 {
 758         ChangeSignaller<Content> cc (this, DCPContentProperty::CPL);
 759
 760         {
 761                 boost::mutex::scoped_lock lm (_mutex);
 762                 _cpl = id;
 763         }
 764 }
 765
 766 bool
 767 DCPContent::kdm_timing_window_valid () const
 768 {
 769         if (!_kdm) {
 770                 return true;
 771         }
 772
 773         dcp::LocalTime now;
 774         return _kdm->not_valid_before() < now && now < _kdm->not_valid_after();
 775 }
 776
 777
 778 Resolution
 779 DCPContent::resolution () const
 780 {
 781         if (video->size().width > 2048 || video->size().height > 1080) {
 782                 return RESOLUTION_4K;
 783         }
 784
 785         return RESOLUTION_2K;
 786 }
 787