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