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                 {
 240                         boost::mutex::scoped_lock lm (_mutex);
 241                         atmos.reset (new AtmosContent(this));
 242                 }
 243                 /* Setting length will cause calculations to be made based on edit rate, so that must
 244                  * be set up first otherwise hard-to-spot exceptions will be thrown.
 245                  */
 246                 atmos->set_edit_rate (examiner->atmos_edit_rate());
 247                 atmos->set_length (examiner->atmos_length());
 248         }
 249
 250         int texts = 0;
 251         {
 252                 boost::mutex::scoped_lock lm (_mutex);
 253                 _name = examiner->name ();
 254                 for (int i = 0; i < TEXT_COUNT; ++i) {
 255                         for (int j = 0; j < examiner->text_count(static_cast<TextType>(i)); ++j) {
 256                                 text.push_back (shared_ptr<TextContent>(new TextContent(this, static_cast<TextType>(i), static_cast<TextType>(i))));
 257                         }
 258                 }
 259                 texts = text.size ();
 260                 _encrypted = examiner->encrypted ();
 261                 _needs_assets = examiner->needs_assets ();
 262                 _kdm_valid = examiner->kdm_valid ();
 263                 _standard = examiner->standard ();
 264                 _three_d = examiner->three_d ();
 265                 _content_kind = examiner->content_kind ();
 266                 _cpl = examiner->cpl ();
 267                 _reel_lengths = examiner->reel_lengths ();
 268                 map<dcp::Marker, dcp::Time> markers = examiner->markers();
 269                 for (map<dcp::Marker, dcp::Time>::const_iterator i = markers.begin(); i != markers.end(); ++i) {
 270                         _markers[i->first] = ContentTime(i->second.as_editable_units(DCPTime::HZ));
 271                 }
 272                 _ratings = examiner->ratings ();
 273                 _content_version = examiner->content_version ();
 274         }
 275
 276         if (old_texts == texts) {
 277                 cc_texts.abort ();
 278         }
 279
 280         if (needed_assets == needs_assets()) {
 281                 cc_assets.abort ();
 282         }
 283
 284         if (needed_kdm == needs_kdm()) {
 285                 cc_kdm.abort ();
 286         }
 287
 288         if (old_name == name()) {
 289                 cc_name.abort ();
 290         }
 291
 292         if (video) {
 293                 video->set_frame_type (_three_d ? VIDEO_FRAME_TYPE_3D : VIDEO_FRAME_TYPE_2D);
 294         }
 295 }
 296
 297 string
 298 DCPContent::summary () const
 299 {
 300         boost::mutex::scoped_lock lm (_mutex);
 301         return String::compose (_("%1 [DCP]"), _name);
 302 }
 303
 304 string
 305 DCPContent::technical_summary () const
 306 {
 307         string s = Content::technical_summary() + " - ";
 308         if (video) {
 309                 s += video->technical_summary() + " - ";
 310         }
 311         if (audio) {
 312                 s += audio->technical_summary() + " - ";
 313         }
 314         return s;
 315 }
 316
 317 void
 318 DCPContent::as_xml (xmlpp::Node* node, bool with_paths) const
 319 {
 320         node->add_child("Type")->add_child_text ("DCP");
 321
 322         Content::as_xml (node, with_paths);
 323
 324         if (video) {
 325                 video->as_xml (node);
 326         }
 327
 328         if (audio) {
 329                 audio->as_xml (node);
 330                 node->add_child("AudioFrameRate")->add_child_text (raw_convert<string> (audio->stream()->frame_rate()));
 331                 node->add_child("AudioLength")->add_child_text (raw_convert<string> (audio->stream()->length()));
 332                 audio->stream()->mapping().as_xml (node->add_child("AudioMapping"));
 333         }
 334
 335         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 336                 i->as_xml (node);
 337         }
 338
 339         if (atmos) {
 340                 atmos->as_xml (node);
 341         }
 342
 343         boost::mutex::scoped_lock lm (_mutex);
 344         node->add_child("Name")->add_child_text (_name);
 345         node->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
 346         node->add_child("NeedsAssets")->add_child_text (_needs_assets ? "1" : "0");
 347         if (_kdm) {
 348                 node->add_child("KDM")->add_child_text (_kdm->as_xml ());
 349         }
 350         node->add_child("KDMValid")->add_child_text (_kdm_valid ? "1" : "0");
 351         node->add_child("ReferenceVideo")->add_child_text (_reference_video ? "1" : "0");
 352         node->add_child("ReferenceAudio")->add_child_text (_reference_audio ? "1" : "0");
 353         node->add_child("ReferenceOpenSubtitle")->add_child_text(_reference_text[TEXT_OPEN_SUBTITLE] ? "1" : "0");
 354         node->add_child("ReferenceClosedCaption")->add_child_text(_reference_text[TEXT_CLOSED_CAPTION] ? "1" : "0");
 355         if (_standard) {
 356                 switch (_standard.get ()) {
 357                 case dcp::INTEROP:
 358                         node->add_child("Standard")->add_child_text ("Interop");
 359                         break;
 360                 case dcp::SMPTE:
 361                         node->add_child("Standard")->add_child_text ("SMPTE");
 362                         break;
 363                 default:
 364                         DCPOMATIC_ASSERT (false);
 365                 }
 366         }
 367         node->add_child("ThreeD")->add_child_text (_three_d ? "1" : "0");
 368         if (_content_kind) {
 369                 node->add_child("ContentKind")->add_child_text(dcp::content_kind_to_string(*_content_kind));
 370         }
 371         if (_cpl) {
 372                 node->add_child("CPL")->add_child_text (_cpl.get ());
 373         }
 374         BOOST_FOREACH (int64_t i, _reel_lengths) {
 375                 node->add_child("ReelLength")->add_child_text (raw_convert<string> (i));
 376         }
 377
 378         for (map<dcp::Marker, ContentTime>::const_iterator i = _markers.begin(); i != _markers.end(); ++i) {
 379                 xmlpp::Element* marker = node->add_child("Marker");
 380                 marker->set_attribute("type", dcp::marker_to_string(i->first));
 381                 marker->add_child_text(raw_convert<string>(i->second.get()));
 382         }
 383
 384         BOOST_FOREACH (dcp::Rating i, _ratings) {
 385                 xmlpp::Element* rating = node->add_child("Rating");
 386                 i.as_xml (rating);
 387         }
 388
 389         node->add_child("ContentVersion")->add_child_text (_content_version);
 390 }
 391
 392 DCPTime
 393 DCPContent::full_length (shared_ptr<const Film> film) const
 394 {
 395         if (!video) {
 396                 return DCPTime();
 397         }
 398         FrameRateChange const frc (film, shared_from_this());
 399         return DCPTime::from_frames (llrint(video->length() * frc.factor()), film->video_frame_rate());
 400 }
 401
 402 DCPTime
 403 DCPContent::approximate_length () const
 404 {
 405         if (!video) {
 406                 return DCPTime();
 407         }
 408         return DCPTime::from_frames (video->length(), 24);
 409 }
 410
 411 string
 412 DCPContent::identifier () const
 413 {
 414         string s = Content::identifier() + "_";
 415
 416         if (video) {
 417                 s += video->identifier() + "_";
 418         }
 419
 420         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 421                 s += i->identifier () + " ";
 422         }
 423
 424         s += string (_reference_video ? "1" : "0");
 425         for (int i = 0; i < TEXT_COUNT; ++i) {
 426                 s += string (_reference_text[i] ? "1" : "0");
 427         }
 428         return s;
 429 }
 430
 431 void
 432 DCPContent::add_kdm (dcp::EncryptedKDM k)
 433 {
 434         _kdm = k;
 435 }
 436
 437 void
 438 DCPContent::add_ov (boost::filesystem::path ov)
 439 {
 440         read_directory (ov);
 441 }
 442
 443 bool
 444 DCPContent::can_be_played () const
 445 {
 446         return !needs_kdm() && !needs_assets();
 447 }
 448
 449 bool
 450 DCPContent::needs_kdm () const
 451 {
 452         boost::mutex::scoped_lock lm (_mutex);
 453         return _encrypted && !_kdm_valid;
 454 }
 455
 456 bool
 457 DCPContent::needs_assets () const
 458 {
 459         boost::mutex::scoped_lock lm (_mutex);
 460         return _needs_assets;
 461 }
 462
 463 vector<boost::filesystem::path>
 464 DCPContent::directories () const
 465 {
 466         return dcp::DCP::directories_from_files (paths());
 467 }
 468
 469 void
 470 DCPContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 471 {
 472         Content::add_properties (film, p);
 473         if (video) {
 474                 video->add_properties (p);
 475         }
 476         if (audio) {
 477                 audio->add_properties (film, p);
 478         }
 479 }
 480
 481 void
 482 DCPContent::set_default_colour_conversion ()
 483 {
 484         /* Default to no colour conversion for DCPs */
 485         if (video) {
 486                 video->unset_colour_conversion ();
 487         }
 488 }
 489
 490 void
 491 DCPContent::set_reference_video (bool r)
 492 {
 493         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_VIDEO);
 494
 495         {
 496                 boost::mutex::scoped_lock lm (_mutex);
 497                 _reference_video = r;
 498         }
 499 }
 500
 501 void
 502 DCPContent::set_reference_audio (bool r)
 503 {
 504         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_AUDIO);
 505
 506         {
 507                 boost::mutex::scoped_lock lm (_mutex);
 508                 _reference_audio = r;
 509         }
 510 }
 511
 512 void
 513 DCPContent::set_reference_text (TextType type, bool r)
 514 {
 515         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_TEXT);
 516
 517         {
 518                 boost::mutex::scoped_lock lm (_mutex);
 519                 _reference_text[type] = r;
 520         }
 521 }
 522
 523 list<DCPTimePeriod>
 524 DCPContent::reels (shared_ptr<const Film> film) const
 525 {
 526         list<int64_t> reel_lengths = _reel_lengths;
 527         if (reel_lengths.empty ()) {
 528                 /* Old metadata with no reel lengths; get them here instead */
 529                 try {
 530                         scoped_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film->tolerant()));
 531                         reel_lengths = examiner->reel_lengths ();
 532                 } catch (...) {
 533                         /* Could not examine the DCP; guess reels */
 534                         reel_lengths.push_back (length_after_trim(film).frames_round(film->video_frame_rate()));
 535                 }
 536         }
 537
 538         list<DCPTimePeriod> p;
 539
 540         /* This content's frame rate must be the same as the output DCP rate, so we can
 541            convert `directly' from ContentTime to DCPTime.
 542         */
 543
 544         /* The starting point of this content on the timeline */
 545         DCPTime pos = position() - DCPTime (trim_start().get());
 546
 547         BOOST_FOREACH (int64_t i, reel_lengths) {
 548                 /* This reel runs from `pos' to `to' */
 549                 DCPTime const to = pos + DCPTime::from_frames (i, film->video_frame_rate());
 550                 if (to > position()) {
 551                         p.push_back (DCPTimePeriod (max(position(), pos), min(end(film), to)));
 552                         if (to > end(film)) {
 553                                 break;
 554                         }
 555                 }
 556                 pos = to;
 557         }
 558
 559         return p;
 560 }
 561
 562 list<DCPTime>
 563 DCPContent::reel_split_points (shared_ptr<const Film> film) const
 564 {
 565         list<DCPTime> s;
 566         BOOST_FOREACH (DCPTimePeriod i, reels(film)) {
 567                 s.push_back (i.from);
 568         }
 569         return s;
 570 }
 571
 572 bool
 573 DCPContent::can_reference (shared_ptr<const Film> film, function<bool (shared_ptr<const Content>)> part, string overlapping, string& why_not) const
 574 {
 575         /* We must be using the same standard as the film */
 576         if (_standard) {
 577                 if (_standard.get() == dcp::INTEROP && !film->interop()) {
 578                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 579                         why_not = _("it is Interop and the film is set to SMPTE.");
 580                         return false;
 581                 } else if (_standard.get() == dcp::SMPTE && film->interop()) {
 582                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 583                         why_not = _("it is SMPTE and the film is set to Interop.");
 584                         return false;
 585                 }
 586         }
 587
 588         /* And the same frame rate */
 589         if (!video_frame_rate() || (lrint(video_frame_rate().get()) != film->video_frame_rate())) {
 590                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 591                 why_not = _("it has a different frame rate to the film.");
 592                 return false;
 593         }
 594
 595         list<DCPTimePeriod> const fr = film->reels ();
 596
 597         list<DCPTimePeriod> reel_list;
 598         try {
 599                 reel_list = reels (film);
 600         } catch (dcp::ReadError &) {
 601                 /* We couldn't read the DCP; it's probably missing */
 602                 return false;
 603         } catch (dcp::KDMDecryptionError &) {
 604                 /* We have an incorrect KDM */
 605                 return false;
 606         }
 607
 608         /* fr must contain reels().  It can also contain other reels, but it must at
 609            least contain reels().
 610         */
 611         BOOST_FOREACH (DCPTimePeriod i, reel_list) {
 612                 if (find (fr.begin(), fr.end(), i) == fr.end ()) {
 613                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 614                         why_not = _("its reel lengths differ from those in the film; set the reel mode to 'split by video content'.");
 615                         return false;
 616                 }
 617         }
 618
 619         ContentList a = overlaps (film, film->content(), part, position(), end(film));
 620         if (a.size() != 1 || a.front().get() != this) {
 621                 why_not = overlapping;
 622                 return false;
 623         }
 624
 625         return true;
 626 }
 627
 628 static
 629 bool check_video (shared_ptr<const Content> c)
 630 {
 631         return static_cast<bool>(c->video) && c->video->use();
 632 }
 633
 634 bool
 635 DCPContent::can_reference_video (shared_ptr<const Film> film, string& why_not) const
 636 {
 637         if (!video) {
 638                 why_not = _("There is no video in this DCP");
 639                 return false;
 640         }
 641
 642         if (film->resolution() != resolution()) {
 643                 if (resolution() == RESOLUTION_4K) {
 644                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 645                         why_not = _("it is 4K and the film is 2K.");
 646                 } else {
 647                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 648                         why_not = _("it is 2K and the film is 4K.");
 649                 }
 650                 return false;
 651         } else if (film->frame_size() != video->size()) {
 652                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 653                 why_not = _("its video frame size differs from the film's.");
 654                 return false;
 655         }
 656
 657         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 658         return can_reference (film, bind (&check_video, _1), _("it overlaps other video content; remove the other content."), why_not);
 659 }
 660
 661 static
 662 bool check_audio (shared_ptr<const Content> c)
 663 {
 664         return static_cast<bool>(c->audio) && !c->audio->mapping().mapped_output_channels().empty();
 665 }
 666
 667 bool
 668 DCPContent::can_reference_audio (shared_ptr<const Film> film, string& why_not) const
 669 {
 670         shared_ptr<DCPDecoder> decoder;
 671         try {
 672                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 673         } catch (dcp::ReadError &) {
 674                 /* We couldn't read the DCP, so it's probably missing */
 675                 return false;
 676         } catch (DCPError &) {
 677                 /* We couldn't read the DCP, so it's probably missing */
 678                 return false;
 679         } catch (dcp::KDMDecryptionError &) {
 680                 /* We have an incorrect KDM */
 681                 return false;
 682         }
 683
 684         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 685                 if (!i->main_sound()) {
 686                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 687                         why_not = _("it does not have sound in all its reels.");
 688                         return false;
 689                 }
 690         }
 691
 692         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 693         return can_reference (film, bind (&check_audio, _1), _("it overlaps other audio content; remove the other content."), why_not);
 694 }
 695
 696 static
 697 bool check_text (shared_ptr<const Content> c)
 698 {
 699         return !c->text.empty();
 700 }
 701
 702 bool
 703 DCPContent::can_reference_text (shared_ptr<const Film> film, TextType type, string& why_not) const
 704 {
 705         shared_ptr<DCPDecoder> decoder;
 706         try {
 707                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 708         } catch (dcp::ReadError &) {
 709                 /* We couldn't read the DCP, so it's probably missing */
 710                 return false;
 711         } catch (dcp::KDMDecryptionError &) {
 712                 /* We have an incorrect KDM */
 713                 return false;
 714         }
 715
 716         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 717                 if (type == TEXT_OPEN_SUBTITLE && !i->main_subtitle()) {
 718                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 719                         why_not = _("it does not have open subtitles in all its reels.");
 720                         return false;
 721                 }
 722                 if (type == TEXT_CLOSED_CAPTION && i->closed_captions().empty()) {
 723                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 724                         why_not = _("it does not have closed captions in all its reels.");
 725                         return false;
 726                 }
 727         }
 728
 729         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 730         return can_reference (film, bind (&check_text, _1), _("it overlaps other text content; remove the other content."), why_not);
 731 }
 732
 733 void
 734 DCPContent::take_settings_from (shared_ptr<const Content> c)
 735 {
 736         shared_ptr<const DCPContent> dc = dynamic_pointer_cast<const DCPContent> (c);
 737         if (!dc) {
 738                 return;
 739         }
 740
 741         _reference_video = dc->_reference_video;
 742         _reference_audio = dc->_reference_audio;
 743         for (int i = 0; i < TEXT_COUNT; ++i) {
 744                 _reference_text[i] = dc->_reference_text[i];
 745         }
 746 }
 747
 748 void
 749 DCPContent::set_cpl (string id)
 750 {
 751         ChangeSignaller<Content> cc (this, DCPContentProperty::CPL);
 752
 753         {
 754                 boost::mutex::scoped_lock lm (_mutex);
 755                 _cpl = id;
 756         }
 757 }
 758
 759 bool
 760 DCPContent::kdm_timing_window_valid () const
 761 {
 762         if (!_kdm) {
 763                 return true;
 764         }
 765
 766         dcp::LocalTime now;
 767         return _kdm->not_valid_before() < now && now < _kdm->not_valid_after();
 768 }
 769
 770
 771 Resolution
 772 DCPContent::resolution () const
 773 {
 774         if (video->size().width > 2048 || video->size().height > 1080) {
 775                 return RESOLUTION_4K;
 776         }
 777
 778         return RESOLUTION_2K;
 779 }
 780