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 using dcp::raw_convert;
  60 using namespace dcpomatic;
  61
  62 int const DCPContentProperty::NEEDS_ASSETS       = 600;
  63 int const DCPContentProperty::NEEDS_KDM          = 601;
  64 int const DCPContentProperty::REFERENCE_VIDEO    = 602;
  65 int const DCPContentProperty::REFERENCE_AUDIO    = 603;
  66 int const DCPContentProperty::REFERENCE_TEXT     = 604;
  67 int const DCPContentProperty::NAME               = 605;
  68 int const DCPContentProperty::TEXTS              = 606;
  69 int const DCPContentProperty::CPL                = 607;
  70
  71 DCPContent::DCPContent (boost::filesystem::path p)
  72         : _encrypted (false)
  73         , _needs_assets (false)
  74         , _kdm_valid (false)
  75         , _reference_video (false)
  76         , _reference_audio (false)
  77         , _three_d (false)
  78 {
  79         LOG_GENERAL ("Creating DCP content from %1", p.string());
  80
  81         read_directory (p);
  82         set_default_colour_conversion ();
  83
  84         for (int i = 0; i < TEXT_COUNT; ++i) {
  85                 _reference_text[i] = false;
  86         }
  87 }
  88
  89 DCPContent::DCPContent (cxml::ConstNodePtr node, int version)
  90         : Content (node)
  91 {
  92         video = VideoContent::from_xml (this, node, version);
  93         audio = AudioContent::from_xml (this, node, version);
  94         text = TextContent::from_xml (this, node, version);
  95         atmos = AtmosContent::from_xml (this, node);
  96
  97         for (int i = 0; i < TEXT_COUNT; ++i) {
  98                 _reference_text[i] = false;
  99         }
 100
 101         if (video && audio) {
 102                 audio->set_stream (
 103                         AudioStreamPtr (
 104                                 new AudioStream (
 105                                         node->number_child<int> ("AudioFrameRate"),
 106                                         /* AudioLength was not present in some old metadata versions */
 107                                         node->optional_number_child<Frame>("AudioLength").get_value_or (
 108                                                 video->length() * node->number_child<int>("AudioFrameRate") / video_frame_rate().get()
 109                                                 ),
 110                                         AudioMapping (node->node_child ("AudioMapping"), version)
 111                                         )
 112                                 )
 113                         );
 114         }
 115
 116         _name = node->string_child ("Name");
 117         _encrypted = node->bool_child ("Encrypted");
 118         _needs_assets = node->optional_bool_child("NeedsAssets").get_value_or (false);
 119         if (node->optional_node_child ("KDM")) {
 120                 _kdm = dcp::EncryptedKDM (node->string_child ("KDM"));
 121         }
 122         _kdm_valid = node->bool_child ("KDMValid");
 123         _reference_video = node->optional_bool_child ("ReferenceVideo").get_value_or (false);
 124         _reference_audio = node->optional_bool_child ("ReferenceAudio").get_value_or (false);
 125         if (version >= 37) {
 126                 _reference_text[TEXT_OPEN_SUBTITLE] = node->optional_bool_child("ReferenceOpenSubtitle").get_value_or(false);
 127                 _reference_text[TEXT_CLOSED_CAPTION] = node->optional_bool_child("ReferenceClosedCaption").get_value_or(false);
 128         } else {
 129                 _reference_text[TEXT_OPEN_SUBTITLE] = node->optional_bool_child("ReferenceSubtitle").get_value_or(false);
 130                 _reference_text[TEXT_CLOSED_CAPTION] = false;
 131         }
 132         if (node->optional_string_child("Standard")) {
 133                 string const s = node->optional_string_child("Standard").get();
 134                 if (s == "Interop") {
 135                         _standard = dcp::INTEROP;
 136                 } else if (s == "SMPTE") {
 137                         _standard = dcp::SMPTE;
 138                 } else {
 139                         DCPOMATIC_ASSERT (false);
 140                 }
 141         }
 142         _three_d = node->optional_bool_child("ThreeD").get_value_or (false);
 143
 144         optional<string> ck = node->optional_string_child("ContentKind");
 145         if (ck) {
 146                 _content_kind = dcp::content_kind_from_string (*ck);
 147         }
 148         _cpl = node->optional_string_child("CPL");
 149         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("ReelLength")) {
 150                 _reel_lengths.push_back (raw_convert<int64_t> (i->content ()));
 151         }
 152
 153         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("Marker")) {
 154                 _markers[dcp::marker_from_string(i->string_attribute("type"))] = ContentTime(raw_convert<int64_t>(i->content()));
 155         }
 156
 157         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("Rating")) {
 158                 _ratings.push_back (dcp::Rating(i));
 159         }
 160
 161         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("ContentVersion")) {
 162                 _content_versions.push_back (i->content());
 163         }
 164 }
 165
 166 void
 167 DCPContent::read_directory (boost::filesystem::path p)
 168 {
 169         read_sub_directory (p);
 170
 171         bool have_assetmap = false;
 172         BOOST_FOREACH (boost::filesystem::path i, paths()) {
 173                 if (i.filename() == "ASSETMAP" || i.filename() == "ASSETMAP.xml") {
 174                         have_assetmap = true;
 175                 }
 176         }
 177
 178         if (!have_assetmap) {
 179                 throw DCPError ("No ASSETMAP or ASSETMAP.xml file found: is this a DCP?");
 180         }
 181 }
 182
 183 void
 184 DCPContent::read_sub_directory (boost::filesystem::path p)
 185 {
 186         LOG_GENERAL ("DCPContent::read_sub_directory reads %1", p.string());
 187         for (boost::filesystem::directory_iterator i(p); i != boost::filesystem::directory_iterator(); ++i) {
 188                 if (boost::filesystem::is_regular_file (i->path())) {
 189                         LOG_GENERAL ("Inside there's regular file %1", i->path().string());
 190                         add_path (i->path());
 191                 } else if (boost::filesystem::is_directory (i->path ())) {
 192                         LOG_GENERAL ("Inside there's directory %1", i->path().string());
 193                         read_sub_directory (i->path());
 194                 }
 195         }
 196 }
 197
 198 /** @param film Film, or 0 */
 199 void
 200 DCPContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
 201 {
 202         bool const needed_assets = needs_assets ();
 203         bool const needed_kdm = needs_kdm ();
 204         string const old_name = name ();
 205
 206         ChangeSignaller<Content> cc_texts (this, DCPContentProperty::TEXTS);
 207         ChangeSignaller<Content> cc_assets (this, DCPContentProperty::NEEDS_ASSETS);
 208         ChangeSignaller<Content> cc_kdm (this, DCPContentProperty::NEEDS_KDM);
 209         ChangeSignaller<Content> cc_name (this, DCPContentProperty::NAME);
 210
 211         if (job) {
 212                 job->set_progress_unknown ();
 213         }
 214         Content::examine (film, job);
 215
 216         shared_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film ? film->tolerant() : true));
 217
 218         if (examiner->has_video()) {
 219                 {
 220                         boost::mutex::scoped_lock lm (_mutex);
 221                         video.reset (new VideoContent (this));
 222                 }
 223                 video->take_from_examiner (examiner);
 224                 set_default_colour_conversion ();
 225         }
 226
 227         if (examiner->has_audio()) {
 228                 {
 229                         boost::mutex::scoped_lock lm (_mutex);
 230                         audio.reset (new AudioContent (this));
 231                 }
 232                 AudioStreamPtr as (new AudioStream (examiner->audio_frame_rate(), examiner->audio_length(), examiner->audio_channels()));
 233                 audio->set_stream (as);
 234                 AudioMapping m = as->mapping ();
 235                 m.make_default (film ? film->audio_processor() : 0);
 236                 as->set_mapping (m);
 237         }
 238
 239         if (examiner->has_atmos()) {
 240                 {
 241                         boost::mutex::scoped_lock lm (_mutex);
 242                         atmos.reset (new AtmosContent(this));
 243                 }
 244                 /* Setting length will cause calculations to be made based on edit rate, so that must
 245                  * be set up first otherwise hard-to-spot exceptions will be thrown.
 246                  */
 247                 atmos->set_edit_rate (examiner->atmos_edit_rate());
 248                 atmos->set_length (examiner->atmos_length());
 249         }
 250
 251         list<shared_ptr<TextContent> > new_text;
 252         for (int i = 0; i < TEXT_COUNT; ++i) {
 253                 for (int j = 0; j < examiner->text_count(static_cast<TextType>(i)); ++j) {
 254                         shared_ptr<TextContent> c(new TextContent(this, static_cast<TextType>(i), static_cast<TextType>(i)));
 255                         if (i == TEXT_CLOSED_CAPTION) {
 256                                 c->set_dcp_track (examiner->dcp_text_track(j));
 257                         }
 258                         new_text.push_back (c);
 259                 }
 260         }
 261
 262         {
 263                 boost::mutex::scoped_lock lm (_mutex);
 264                 text = new_text;
 265                 _name = examiner->name ();
 266                 _encrypted = examiner->encrypted ();
 267                 _needs_assets = examiner->needs_assets ();
 268                 _kdm_valid = examiner->kdm_valid ();
 269                 _standard = examiner->standard ();
 270                 _three_d = examiner->three_d ();
 271                 _content_kind = examiner->content_kind ();
 272                 _cpl = examiner->cpl ();
 273                 _reel_lengths = examiner->reel_lengths ();
 274                 map<dcp::Marker, dcp::Time> markers = examiner->markers();
 275                 for (map<dcp::Marker, dcp::Time>::const_iterator i = markers.begin(); i != markers.end(); ++i) {
 276                         _markers[i->first] = ContentTime(i->second.as_editable_units(DCPTime::HZ));
 277                 }
 278                 _ratings = examiner->ratings ();
 279                 _content_versions = examiner->content_versions ();
 280         }
 281
 282         if (needed_assets == needs_assets()) {
 283                 cc_assets.abort ();
 284         }
 285
 286         if (needed_kdm == needs_kdm()) {
 287                 cc_kdm.abort ();
 288         }
 289
 290         if (old_name == name()) {
 291                 cc_name.abort ();
 292         }
 293
 294         if (video) {
 295                 video->set_frame_type (_three_d ? VIDEO_FRAME_TYPE_3D : VIDEO_FRAME_TYPE_2D);
 296         }
 297 }
 298
 299 string
 300 DCPContent::summary () const
 301 {
 302         boost::mutex::scoped_lock lm (_mutex);
 303         return String::compose (_("%1 [DCP]"), _name);
 304 }
 305
 306 string
 307 DCPContent::technical_summary () const
 308 {
 309         string s = Content::technical_summary() + " - ";
 310         if (video) {
 311                 s += video->technical_summary() + " - ";
 312         }
 313         if (audio) {
 314                 s += audio->technical_summary() + " - ";
 315         }
 316         return s;
 317 }
 318
 319 void
 320 DCPContent::as_xml (xmlpp::Node* node, bool with_paths) const
 321 {
 322         node->add_child("Type")->add_child_text ("DCP");
 323
 324         Content::as_xml (node, with_paths);
 325
 326         if (video) {
 327                 video->as_xml (node);
 328         }
 329
 330         if (audio) {
 331                 audio->as_xml (node);
 332                 node->add_child("AudioFrameRate")->add_child_text (raw_convert<string> (audio->stream()->frame_rate()));
 333                 node->add_child("AudioLength")->add_child_text (raw_convert<string> (audio->stream()->length()));
 334                 audio->stream()->mapping().as_xml (node->add_child("AudioMapping"));
 335         }
 336
 337         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 338                 i->as_xml (node);
 339         }
 340
 341         if (atmos) {
 342                 atmos->as_xml (node);
 343         }
 344
 345         boost::mutex::scoped_lock lm (_mutex);
 346         node->add_child("Name")->add_child_text (_name);
 347         node->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
 348         node->add_child("NeedsAssets")->add_child_text (_needs_assets ? "1" : "0");
 349         if (_kdm) {
 350                 node->add_child("KDM")->add_child_text (_kdm->as_xml ());
 351         }
 352         node->add_child("KDMValid")->add_child_text (_kdm_valid ? "1" : "0");
 353         node->add_child("ReferenceVideo")->add_child_text (_reference_video ? "1" : "0");
 354         node->add_child("ReferenceAudio")->add_child_text (_reference_audio ? "1" : "0");
 355         node->add_child("ReferenceOpenSubtitle")->add_child_text(_reference_text[TEXT_OPEN_SUBTITLE] ? "1" : "0");
 356         node->add_child("ReferenceClosedCaption")->add_child_text(_reference_text[TEXT_CLOSED_CAPTION] ? "1" : "0");
 357         if (_standard) {
 358                 switch (_standard.get ()) {
 359                 case dcp::INTEROP:
 360                         node->add_child("Standard")->add_child_text ("Interop");
 361                         break;
 362                 case dcp::SMPTE:
 363                         node->add_child("Standard")->add_child_text ("SMPTE");
 364                         break;
 365                 default:
 366                         DCPOMATIC_ASSERT (false);
 367                 }
 368         }
 369         node->add_child("ThreeD")->add_child_text (_three_d ? "1" : "0");
 370         if (_content_kind) {
 371                 node->add_child("ContentKind")->add_child_text(dcp::content_kind_to_string(*_content_kind));
 372         }
 373         if (_cpl) {
 374                 node->add_child("CPL")->add_child_text (_cpl.get ());
 375         }
 376         BOOST_FOREACH (int64_t i, _reel_lengths) {
 377                 node->add_child("ReelLength")->add_child_text (raw_convert<string> (i));
 378         }
 379
 380         for (map<dcp::Marker, ContentTime>::const_iterator i = _markers.begin(); i != _markers.end(); ++i) {
 381                 xmlpp::Element* marker = node->add_child("Marker");
 382                 marker->set_attribute("type", dcp::marker_to_string(i->first));
 383                 marker->add_child_text(raw_convert<string>(i->second.get()));
 384         }
 385
 386         BOOST_FOREACH (dcp::Rating i, _ratings) {
 387                 xmlpp::Element* rating = node->add_child("Rating");
 388                 i.as_xml (rating);
 389         }
 390
 391         BOOST_FOREACH (string i, _content_versions) {
 392                 node->add_child("ContentVersion")->add_child_text(i);
 393         }
 394 }
 395
 396 DCPTime
 397 DCPContent::full_length (shared_ptr<const Film> film) const
 398 {
 399         if (!video) {
 400                 return DCPTime();
 401         }
 402         FrameRateChange const frc (film, shared_from_this());
 403         return DCPTime::from_frames (llrint(video->length() * frc.factor()), film->video_frame_rate());
 404 }
 405
 406 DCPTime
 407 DCPContent::approximate_length () const
 408 {
 409         if (!video) {
 410                 return DCPTime();
 411         }
 412         return DCPTime::from_frames (video->length(), 24);
 413 }
 414
 415 string
 416 DCPContent::identifier () const
 417 {
 418         string s = Content::identifier() + "_";
 419
 420         if (video) {
 421                 s += video->identifier() + "_";
 422         }
 423
 424         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 425                 s += i->identifier () + " ";
 426         }
 427
 428         s += string (_reference_video ? "1" : "0");
 429         for (int i = 0; i < TEXT_COUNT; ++i) {
 430                 s += string (_reference_text[i] ? "1" : "0");
 431         }
 432         return s;
 433 }
 434
 435 void
 436 DCPContent::add_kdm (dcp::EncryptedKDM k)
 437 {
 438         _kdm = k;
 439 }
 440
 441 void
 442 DCPContent::add_ov (boost::filesystem::path ov)
 443 {
 444         read_directory (ov);
 445 }
 446
 447 bool
 448 DCPContent::can_be_played () const
 449 {
 450         return !needs_kdm() && !needs_assets();
 451 }
 452
 453 bool
 454 DCPContent::needs_kdm () const
 455 {
 456         boost::mutex::scoped_lock lm (_mutex);
 457         return _encrypted && !_kdm_valid;
 458 }
 459
 460 bool
 461 DCPContent::needs_assets () const
 462 {
 463         boost::mutex::scoped_lock lm (_mutex);
 464         return _needs_assets;
 465 }
 466
 467 vector<boost::filesystem::path>
 468 DCPContent::directories () const
 469 {
 470         return dcp::DCP::directories_from_files (paths());
 471 }
 472
 473 void
 474 DCPContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 475 {
 476         Content::add_properties (film, p);
 477         if (video) {
 478                 video->add_properties (p);
 479         }
 480         if (audio) {
 481                 audio->add_properties (film, p);
 482         }
 483 }
 484
 485 void
 486 DCPContent::set_default_colour_conversion ()
 487 {
 488         /* Default to no colour conversion for DCPs */
 489         if (video) {
 490                 video->unset_colour_conversion ();
 491         }
 492 }
 493
 494 void
 495 DCPContent::set_reference_video (bool r)
 496 {
 497         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_VIDEO);
 498
 499         {
 500                 boost::mutex::scoped_lock lm (_mutex);
 501                 _reference_video = r;
 502         }
 503 }
 504
 505 void
 506 DCPContent::set_reference_audio (bool r)
 507 {
 508         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_AUDIO);
 509
 510         {
 511                 boost::mutex::scoped_lock lm (_mutex);
 512                 _reference_audio = r;
 513         }
 514 }
 515
 516 void
 517 DCPContent::set_reference_text (TextType type, bool r)
 518 {
 519         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_TEXT);
 520
 521         {
 522                 boost::mutex::scoped_lock lm (_mutex);
 523                 _reference_text[type] = r;
 524         }
 525 }
 526
 527 list<DCPTimePeriod>
 528 DCPContent::reels (shared_ptr<const Film> film) const
 529 {
 530         list<int64_t> reel_lengths = _reel_lengths;
 531         if (reel_lengths.empty ()) {
 532                 /* Old metadata with no reel lengths; get them here instead */
 533                 try {
 534                         scoped_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film->tolerant()));
 535                         reel_lengths = examiner->reel_lengths ();
 536                 } catch (...) {
 537                         /* Could not examine the DCP; guess reels */
 538                         reel_lengths.push_back (length_after_trim(film).frames_round(film->video_frame_rate()));
 539                 }
 540         }
 541
 542         list<DCPTimePeriod> p;
 543
 544         /* This content's frame rate must be the same as the output DCP rate, so we can
 545            convert `directly' from ContentTime to DCPTime.
 546         */
 547
 548         /* The starting point of this content on the timeline */
 549         DCPTime pos = position() - DCPTime (trim_start().get());
 550
 551         BOOST_FOREACH (int64_t i, reel_lengths) {
 552                 /* This reel runs from `pos' to `to' */
 553                 DCPTime const to = pos + DCPTime::from_frames (i, film->video_frame_rate());
 554                 if (to > position()) {
 555                         p.push_back (DCPTimePeriod (max(position(), pos), min(end(film), to)));
 556                         if (to > end(film)) {
 557                                 break;
 558                         }
 559                 }
 560                 pos = to;
 561         }
 562
 563         return p;
 564 }
 565
 566 list<DCPTime>
 567 DCPContent::reel_split_points (shared_ptr<const Film> film) const
 568 {
 569         list<DCPTime> s;
 570         BOOST_FOREACH (DCPTimePeriod i, reels(film)) {
 571                 s.push_back (i.from);
 572         }
 573         return s;
 574 }
 575
 576 bool
 577 DCPContent::can_reference (shared_ptr<const Film> film, function<bool (shared_ptr<const Content>)> part, string overlapping, string& why_not) const
 578 {
 579         /* We must be using the same standard as the film */
 580         if (_standard) {
 581                 if (_standard.get() == dcp::INTEROP && !film->interop()) {
 582                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 583                         why_not = _("it is Interop and the film is set to SMPTE.");
 584                         return false;
 585                 } else if (_standard.get() == dcp::SMPTE && film->interop()) {
 586                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 587                         why_not = _("it is SMPTE and the film is set to Interop.");
 588                         return false;
 589                 }
 590         }
 591
 592         /* And the same frame rate */
 593         if (!video_frame_rate() || (lrint(video_frame_rate().get()) != film->video_frame_rate())) {
 594                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 595                 why_not = _("it has a different frame rate to the film.");
 596                 return false;
 597         }
 598
 599         list<DCPTimePeriod> const fr = film->reels ();
 600
 601         list<DCPTimePeriod> reel_list;
 602         try {
 603                 reel_list = reels (film);
 604         } catch (dcp::ReadError &) {
 605                 /* We couldn't read the DCP; it's probably missing */
 606                 return false;
 607         } catch (dcp::KDMDecryptionError &) {
 608                 /* We have an incorrect KDM */
 609                 return false;
 610         }
 611
 612         /* fr must contain reels().  It can also contain other reels, but it must at
 613            least contain reels().
 614         */
 615         BOOST_FOREACH (DCPTimePeriod i, reel_list) {
 616                 if (find (fr.begin(), fr.end(), i) == fr.end ()) {
 617                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 618                         why_not = _("its reel lengths differ from those in the film; set the reel mode to 'split by video content'.");
 619                         return false;
 620                 }
 621         }
 622
 623         ContentList a = overlaps (film, film->content(), part, position(), end(film));
 624         if (a.size() != 1 || a.front().get() != this) {
 625                 why_not = overlapping;
 626                 return false;
 627         }
 628
 629         return true;
 630 }
 631
 632 static
 633 bool check_video (shared_ptr<const Content> c)
 634 {
 635         return static_cast<bool>(c->video) && c->video->use();
 636 }
 637
 638 bool
 639 DCPContent::can_reference_video (shared_ptr<const Film> film, string& why_not) const
 640 {
 641         if (!video) {
 642                 why_not = _("There is no video in this DCP");
 643                 return false;
 644         }
 645
 646         if (film->resolution() != resolution()) {
 647                 if (resolution() == RESOLUTION_4K) {
 648                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 649                         why_not = _("it is 4K and the film is 2K.");
 650                 } else {
 651                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 652                         why_not = _("it is 2K and the film is 4K.");
 653                 }
 654                 return false;
 655         } else if (film->frame_size() != video->size()) {
 656                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 657                 why_not = _("its video frame size differs from the film's.");
 658                 return false;
 659         }
 660
 661         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 662         return can_reference (film, bind (&check_video, _1), _("it overlaps other video content; remove the other content."), why_not);
 663 }
 664
 665 static
 666 bool check_audio (shared_ptr<const Content> c)
 667 {
 668         return static_cast<bool>(c->audio) && !c->audio->mapping().mapped_output_channels().empty();
 669 }
 670
 671 bool
 672 DCPContent::can_reference_audio (shared_ptr<const Film> film, string& why_not) const
 673 {
 674         shared_ptr<DCPDecoder> decoder;
 675         try {
 676                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 677         } catch (dcp::ReadError &) {
 678                 /* We couldn't read the DCP, so it's probably missing */
 679                 return false;
 680         } catch (DCPError &) {
 681                 /* We couldn't read the DCP, so it's probably missing */
 682                 return false;
 683         } catch (dcp::KDMDecryptionError &) {
 684                 /* We have an incorrect KDM */
 685                 return false;
 686         }
 687
 688         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 689                 if (!i->main_sound()) {
 690                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 691                         why_not = _("it does not have sound in all its reels.");
 692                         return false;
 693                 }
 694         }
 695
 696         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 697         return can_reference (film, bind (&check_audio, _1), _("it overlaps other audio content; remove the other content."), why_not);
 698 }
 699
 700 static
 701 bool check_text (shared_ptr<const Content> c)
 702 {
 703         return !c->text.empty();
 704 }
 705
 706 bool
 707 DCPContent::can_reference_text (shared_ptr<const Film> film, TextType type, string& why_not) const
 708 {
 709         shared_ptr<DCPDecoder> decoder;
 710         try {
 711                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 712         } catch (dcp::ReadError &) {
 713                 /* We couldn't read the DCP, so it's probably missing */
 714                 return false;
 715         } catch (dcp::KDMDecryptionError &) {
 716                 /* We have an incorrect KDM */
 717                 return false;
 718         }
 719
 720         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 721                 if (type == TEXT_OPEN_SUBTITLE && !i->main_subtitle()) {
 722                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 723                         why_not = _("it does not have open subtitles in all its reels.");
 724                         return false;
 725                 }
 726                 if (type == TEXT_CLOSED_CAPTION && i->closed_captions().empty()) {
 727                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 728                         why_not = _("it does not have closed captions in all its reels.");
 729                         return false;
 730                 }
 731         }
 732
 733         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 734         return can_reference (film, bind (&check_text, _1), _("it overlaps other text content; remove the other content."), why_not);
 735 }
 736
 737 void
 738 DCPContent::take_settings_from (shared_ptr<const Content> c)
 739 {
 740         shared_ptr<const DCPContent> dc = dynamic_pointer_cast<const DCPContent> (c);
 741         if (!dc) {
 742                 return;
 743         }
 744
 745         _reference_video = dc->_reference_video;
 746         _reference_audio = dc->_reference_audio;
 747         for (int i = 0; i < TEXT_COUNT; ++i) {
 748                 _reference_text[i] = dc->_reference_text[i];
 749         }
 750 }
 751
 752 void
 753 DCPContent::set_cpl (string id)
 754 {
 755         ChangeSignaller<Content> cc (this, DCPContentProperty::CPL);
 756
 757         {
 758                 boost::mutex::scoped_lock lm (_mutex);
 759                 _cpl = id;
 760         }
 761 }
 762
 763 bool
 764 DCPContent::kdm_timing_window_valid () const
 765 {
 766         if (!_kdm) {
 767                 return true;
 768         }
 769
 770         dcp::LocalTime now;
 771         return _kdm->not_valid_before() < now && now < _kdm->not_valid_after();
 772 }
 773
 774
 775 Resolution
 776 DCPContent::resolution () const
 777 {
 778         if (video->size().width > 2048 || video->size().height > 1080) {
 779                 return RESOLUTION_4K;
 780         }
 781
 782         return RESOLUTION_2K;
 783 }
 784