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         int const old_texts = text.size ();
 206
 207         ChangeSignaller<Content> cc_texts (this, DCPContentProperty::TEXTS);
 208         ChangeSignaller<Content> cc_assets (this, DCPContentProperty::NEEDS_ASSETS);
 209         ChangeSignaller<Content> cc_kdm (this, DCPContentProperty::NEEDS_KDM);
 210         ChangeSignaller<Content> cc_name (this, DCPContentProperty::NAME);
 211
 212         if (job) {
 213                 job->set_progress_unknown ();
 214         }
 215         Content::examine (film, job);
 216
 217         shared_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film ? film->tolerant() : true));
 218
 219         if (examiner->has_video()) {
 220                 {
 221                         boost::mutex::scoped_lock lm (_mutex);
 222                         video.reset (new VideoContent (this));
 223                 }
 224                 video->take_from_examiner (examiner);
 225                 set_default_colour_conversion ();
 226         }
 227
 228         if (examiner->has_audio()) {
 229                 {
 230                         boost::mutex::scoped_lock lm (_mutex);
 231                         audio.reset (new AudioContent (this));
 232                 }
 233                 AudioStreamPtr as (new AudioStream (examiner->audio_frame_rate(), examiner->audio_length(), examiner->audio_channels()));
 234                 audio->set_stream (as);
 235                 AudioMapping m = as->mapping ();
 236                 m.make_default (film ? film->audio_processor() : 0);
 237                 as->set_mapping (m);
 238         }
 239
 240         if (examiner->has_atmos()) {
 241                 {
 242                         boost::mutex::scoped_lock lm (_mutex);
 243                         atmos.reset (new AtmosContent(this));
 244                 }
 245                 /* Setting length will cause calculations to be made based on edit rate, so that must
 246                  * be set up first otherwise hard-to-spot exceptions will be thrown.
 247                  */
 248                 atmos->set_edit_rate (examiner->atmos_edit_rate());
 249                 atmos->set_length (examiner->atmos_length());
 250         }
 251
 252         int texts = 0;
 253         {
 254                 boost::mutex::scoped_lock lm (_mutex);
 255                 _name = examiner->name ();
 256                 for (int i = 0; i < TEXT_COUNT; ++i) {
 257                         for (int j = 0; j < examiner->text_count(static_cast<TextType>(i)); ++j) {
 258                                 shared_ptr<TextContent> c(new TextContent(this, static_cast<TextType>(i), static_cast<TextType>(i)));
 259                                 if (i == TEXT_CLOSED_CAPTION) {
 260                                         c->set_dcp_track (examiner->dcp_text_track(j));
 261                                 }
 262                                 text.push_back (c);
 263                         }
 264                 }
 265                 texts = text.size ();
 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 (old_texts == texts) {
 283                 cc_texts.abort ();
 284         }
 285
 286         if (needed_assets == needs_assets()) {
 287                 cc_assets.abort ();
 288         }
 289
 290         if (needed_kdm == needs_kdm()) {
 291                 cc_kdm.abort ();
 292         }
 293
 294         if (old_name == name()) {
 295                 cc_name.abort ();
 296         }
 297
 298         if (video) {
 299                 video->set_frame_type (_three_d ? VIDEO_FRAME_TYPE_3D : VIDEO_FRAME_TYPE_2D);
 300         }
 301 }
 302
 303 string
 304 DCPContent::summary () const
 305 {
 306         boost::mutex::scoped_lock lm (_mutex);
 307         return String::compose (_("%1 [DCP]"), _name);
 308 }
 309
 310 string
 311 DCPContent::technical_summary () const
 312 {
 313         string s = Content::technical_summary() + " - ";
 314         if (video) {
 315                 s += video->technical_summary() + " - ";
 316         }
 317         if (audio) {
 318                 s += audio->technical_summary() + " - ";
 319         }
 320         return s;
 321 }
 322
 323 void
 324 DCPContent::as_xml (xmlpp::Node* node, bool with_paths) const
 325 {
 326         node->add_child("Type")->add_child_text ("DCP");
 327
 328         Content::as_xml (node, with_paths);
 329
 330         if (video) {
 331                 video->as_xml (node);
 332         }
 333
 334         if (audio) {
 335                 audio->as_xml (node);
 336                 node->add_child("AudioFrameRate")->add_child_text (raw_convert<string> (audio->stream()->frame_rate()));
 337                 node->add_child("AudioLength")->add_child_text (raw_convert<string> (audio->stream()->length()));
 338                 audio->stream()->mapping().as_xml (node->add_child("AudioMapping"));
 339         }
 340
 341         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 342                 i->as_xml (node);
 343         }
 344
 345         if (atmos) {
 346                 atmos->as_xml (node);
 347         }
 348
 349         boost::mutex::scoped_lock lm (_mutex);
 350         node->add_child("Name")->add_child_text (_name);
 351         node->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
 352         node->add_child("NeedsAssets")->add_child_text (_needs_assets ? "1" : "0");
 353         if (_kdm) {
 354                 node->add_child("KDM")->add_child_text (_kdm->as_xml ());
 355         }
 356         node->add_child("KDMValid")->add_child_text (_kdm_valid ? "1" : "0");
 357         node->add_child("ReferenceVideo")->add_child_text (_reference_video ? "1" : "0");
 358         node->add_child("ReferenceAudio")->add_child_text (_reference_audio ? "1" : "0");
 359         node->add_child("ReferenceOpenSubtitle")->add_child_text(_reference_text[TEXT_OPEN_SUBTITLE] ? "1" : "0");
 360         node->add_child("ReferenceClosedCaption")->add_child_text(_reference_text[TEXT_CLOSED_CAPTION] ? "1" : "0");
 361         if (_standard) {
 362                 switch (_standard.get ()) {
 363                 case dcp::INTEROP:
 364                         node->add_child("Standard")->add_child_text ("Interop");
 365                         break;
 366                 case dcp::SMPTE:
 367                         node->add_child("Standard")->add_child_text ("SMPTE");
 368                         break;
 369                 default:
 370                         DCPOMATIC_ASSERT (false);
 371                 }
 372         }
 373         node->add_child("ThreeD")->add_child_text (_three_d ? "1" : "0");
 374         if (_content_kind) {
 375                 node->add_child("ContentKind")->add_child_text(dcp::content_kind_to_string(*_content_kind));
 376         }
 377         if (_cpl) {
 378                 node->add_child("CPL")->add_child_text (_cpl.get ());
 379         }
 380         BOOST_FOREACH (int64_t i, _reel_lengths) {
 381                 node->add_child("ReelLength")->add_child_text (raw_convert<string> (i));
 382         }
 383
 384         for (map<dcp::Marker, ContentTime>::const_iterator i = _markers.begin(); i != _markers.end(); ++i) {
 385                 xmlpp::Element* marker = node->add_child("Marker");
 386                 marker->set_attribute("type", dcp::marker_to_string(i->first));
 387                 marker->add_child_text(raw_convert<string>(i->second.get()));
 388         }
 389
 390         BOOST_FOREACH (dcp::Rating i, _ratings) {
 391                 xmlpp::Element* rating = node->add_child("Rating");
 392                 i.as_xml (rating);
 393         }
 394
 395         BOOST_FOREACH (string i, _content_versions) {
 396                 node->add_child("ContentVersion")->add_child_text(i);
 397         }
 398 }
 399
 400 DCPTime
 401 DCPContent::full_length (shared_ptr<const Film> film) const
 402 {
 403         if (!video) {
 404                 return DCPTime();
 405         }
 406         FrameRateChange const frc (film, shared_from_this());
 407         return DCPTime::from_frames (llrint(video->length() * frc.factor()), film->video_frame_rate());
 408 }
 409
 410 DCPTime
 411 DCPContent::approximate_length () const
 412 {
 413         if (!video) {
 414                 return DCPTime();
 415         }
 416         return DCPTime::from_frames (video->length(), 24);
 417 }
 418
 419 string
 420 DCPContent::identifier () const
 421 {
 422         string s = Content::identifier() + "_";
 423
 424         if (video) {
 425                 s += video->identifier() + "_";
 426         }
 427
 428         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 429                 s += i->identifier () + " ";
 430         }
 431
 432         s += string (_reference_video ? "1" : "0");
 433         for (int i = 0; i < TEXT_COUNT; ++i) {
 434                 s += string (_reference_text[i] ? "1" : "0");
 435         }
 436         return s;
 437 }
 438
 439 void
 440 DCPContent::add_kdm (dcp::EncryptedKDM k)
 441 {
 442         _kdm = k;
 443 }
 444
 445 void
 446 DCPContent::add_ov (boost::filesystem::path ov)
 447 {
 448         read_directory (ov);
 449 }
 450
 451 bool
 452 DCPContent::can_be_played () const
 453 {
 454         return !needs_kdm() && !needs_assets();
 455 }
 456
 457 bool
 458 DCPContent::needs_kdm () const
 459 {
 460         boost::mutex::scoped_lock lm (_mutex);
 461         return _encrypted && !_kdm_valid;
 462 }
 463
 464 bool
 465 DCPContent::needs_assets () const
 466 {
 467         boost::mutex::scoped_lock lm (_mutex);
 468         return _needs_assets;
 469 }
 470
 471 vector<boost::filesystem::path>
 472 DCPContent::directories () const
 473 {
 474         return dcp::DCP::directories_from_files (paths());
 475 }
 476
 477 void
 478 DCPContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 479 {
 480         Content::add_properties (film, p);
 481         if (video) {
 482                 video->add_properties (p);
 483         }
 484         if (audio) {
 485                 audio->add_properties (film, p);
 486         }
 487 }
 488
 489 void
 490 DCPContent::set_default_colour_conversion ()
 491 {
 492         /* Default to no colour conversion for DCPs */
 493         if (video) {
 494                 video->unset_colour_conversion ();
 495         }
 496 }
 497
 498 void
 499 DCPContent::set_reference_video (bool r)
 500 {
 501         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_VIDEO);
 502
 503         {
 504                 boost::mutex::scoped_lock lm (_mutex);
 505                 _reference_video = r;
 506         }
 507 }
 508
 509 void
 510 DCPContent::set_reference_audio (bool r)
 511 {
 512         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_AUDIO);
 513
 514         {
 515                 boost::mutex::scoped_lock lm (_mutex);
 516                 _reference_audio = r;
 517         }
 518 }
 519
 520 void
 521 DCPContent::set_reference_text (TextType type, bool r)
 522 {
 523         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_TEXT);
 524
 525         {
 526                 boost::mutex::scoped_lock lm (_mutex);
 527                 _reference_text[type] = r;
 528         }
 529 }
 530
 531 list<DCPTimePeriod>
 532 DCPContent::reels (shared_ptr<const Film> film) const
 533 {
 534         list<int64_t> reel_lengths = _reel_lengths;
 535         if (reel_lengths.empty ()) {
 536                 /* Old metadata with no reel lengths; get them here instead */
 537                 try {
 538                         scoped_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film->tolerant()));
 539                         reel_lengths = examiner->reel_lengths ();
 540                 } catch (...) {
 541                         /* Could not examine the DCP; guess reels */
 542                         reel_lengths.push_back (length_after_trim(film).frames_round(film->video_frame_rate()));
 543                 }
 544         }
 545
 546         list<DCPTimePeriod> p;
 547
 548         /* This content's frame rate must be the same as the output DCP rate, so we can
 549            convert `directly' from ContentTime to DCPTime.
 550         */
 551
 552         /* The starting point of this content on the timeline */
 553         DCPTime pos = position() - DCPTime (trim_start().get());
 554
 555         BOOST_FOREACH (int64_t i, reel_lengths) {
 556                 /* This reel runs from `pos' to `to' */
 557                 DCPTime const to = pos + DCPTime::from_frames (i, film->video_frame_rate());
 558                 if (to > position()) {
 559                         p.push_back (DCPTimePeriod (max(position(), pos), min(end(film), to)));
 560                         if (to > end(film)) {
 561                                 break;
 562                         }
 563                 }
 564                 pos = to;
 565         }
 566
 567         return p;
 568 }
 569
 570 list<DCPTime>
 571 DCPContent::reel_split_points (shared_ptr<const Film> film) const
 572 {
 573         list<DCPTime> s;
 574         BOOST_FOREACH (DCPTimePeriod i, reels(film)) {
 575                 s.push_back (i.from);
 576         }
 577         return s;
 578 }
 579
 580 bool
 581 DCPContent::can_reference (shared_ptr<const Film> film, function<bool (shared_ptr<const Content>)> part, string overlapping, string& why_not) const
 582 {
 583         /* We must be using the same standard as the film */
 584         if (_standard) {
 585                 if (_standard.get() == dcp::INTEROP && !film->interop()) {
 586                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 587                         why_not = _("it is Interop and the film is set to SMPTE.");
 588                         return false;
 589                 } else if (_standard.get() == dcp::SMPTE && film->interop()) {
 590                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 591                         why_not = _("it is SMPTE and the film is set to Interop.");
 592                         return false;
 593                 }
 594         }
 595
 596         /* And the same frame rate */
 597         if (!video_frame_rate() || (lrint(video_frame_rate().get()) != film->video_frame_rate())) {
 598                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 599                 why_not = _("it has a different frame rate to the film.");
 600                 return false;
 601         }
 602
 603         list<DCPTimePeriod> const fr = film->reels ();
 604
 605         list<DCPTimePeriod> reel_list;
 606         try {
 607                 reel_list = reels (film);
 608         } catch (dcp::ReadError &) {
 609                 /* We couldn't read the DCP; it's probably missing */
 610                 return false;
 611         } catch (dcp::KDMDecryptionError &) {
 612                 /* We have an incorrect KDM */
 613                 return false;
 614         }
 615
 616         /* fr must contain reels().  It can also contain other reels, but it must at
 617            least contain reels().
 618         */
 619         BOOST_FOREACH (DCPTimePeriod i, reel_list) {
 620                 if (find (fr.begin(), fr.end(), i) == fr.end ()) {
 621                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 622                         why_not = _("its reel lengths differ from those in the film; set the reel mode to 'split by video content'.");
 623                         return false;
 624                 }
 625         }
 626
 627         ContentList a = overlaps (film, film->content(), part, position(), end(film));
 628         if (a.size() != 1 || a.front().get() != this) {
 629                 why_not = overlapping;
 630                 return false;
 631         }
 632
 633         return true;
 634 }
 635
 636 static
 637 bool check_video (shared_ptr<const Content> c)
 638 {
 639         return static_cast<bool>(c->video) && c->video->use();
 640 }
 641
 642 bool
 643 DCPContent::can_reference_video (shared_ptr<const Film> film, string& why_not) const
 644 {
 645         if (!video) {
 646                 why_not = _("There is no video in this DCP");
 647                 return false;
 648         }
 649
 650         if (film->resolution() != resolution()) {
 651                 if (resolution() == RESOLUTION_4K) {
 652                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 653                         why_not = _("it is 4K and the film is 2K.");
 654                 } else {
 655                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 656                         why_not = _("it is 2K and the film is 4K.");
 657                 }
 658                 return false;
 659         } else if (film->frame_size() != video->size()) {
 660                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 661                 why_not = _("its video frame size differs from the film's.");
 662                 return false;
 663         }
 664
 665         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 666         return can_reference (film, bind (&check_video, _1), _("it overlaps other video content; remove the other content."), why_not);
 667 }
 668
 669 static
 670 bool check_audio (shared_ptr<const Content> c)
 671 {
 672         return static_cast<bool>(c->audio) && !c->audio->mapping().mapped_output_channels().empty();
 673 }
 674
 675 bool
 676 DCPContent::can_reference_audio (shared_ptr<const Film> film, string& why_not) const
 677 {
 678         shared_ptr<DCPDecoder> decoder;
 679         try {
 680                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 681         } catch (dcp::ReadError &) {
 682                 /* We couldn't read the DCP, so it's probably missing */
 683                 return false;
 684         } catch (DCPError &) {
 685                 /* We couldn't read the DCP, so it's probably missing */
 686                 return false;
 687         } catch (dcp::KDMDecryptionError &) {
 688                 /* We have an incorrect KDM */
 689                 return false;
 690         }
 691
 692         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 693                 if (!i->main_sound()) {
 694                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 695                         why_not = _("it does not have sound in all its reels.");
 696                         return false;
 697                 }
 698         }
 699
 700         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 701         return can_reference (film, bind (&check_audio, _1), _("it overlaps other audio content; remove the other content."), why_not);
 702 }
 703
 704 static
 705 bool check_text (shared_ptr<const Content> c)
 706 {
 707         return !c->text.empty();
 708 }
 709
 710 bool
 711 DCPContent::can_reference_text (shared_ptr<const Film> film, TextType type, string& why_not) const
 712 {
 713         shared_ptr<DCPDecoder> decoder;
 714         try {
 715                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 716         } catch (dcp::ReadError &) {
 717                 /* We couldn't read the DCP, so it's probably missing */
 718                 return false;
 719         } catch (dcp::KDMDecryptionError &) {
 720                 /* We have an incorrect KDM */
 721                 return false;
 722         }
 723
 724         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 725                 if (type == TEXT_OPEN_SUBTITLE && !i->main_subtitle()) {
 726                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 727                         why_not = _("it does not have open subtitles in all its reels.");
 728                         return false;
 729                 }
 730                 if (type == TEXT_CLOSED_CAPTION && i->closed_captions().empty()) {
 731                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 732                         why_not = _("it does not have closed captions in all its reels.");
 733                         return false;
 734                 }
 735         }
 736
 737         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 738         return can_reference (film, bind (&check_text, _1), _("it overlaps other text content; remove the other content."), why_not);
 739 }
 740
 741 void
 742 DCPContent::take_settings_from (shared_ptr<const Content> c)
 743 {
 744         shared_ptr<const DCPContent> dc = dynamic_pointer_cast<const DCPContent> (c);
 745         if (!dc) {
 746                 return;
 747         }
 748
 749         _reference_video = dc->_reference_video;
 750         _reference_audio = dc->_reference_audio;
 751         for (int i = 0; i < TEXT_COUNT; ++i) {
 752                 _reference_text[i] = dc->_reference_text[i];
 753         }
 754 }
 755
 756 void
 757 DCPContent::set_cpl (string id)
 758 {
 759         ChangeSignaller<Content> cc (this, DCPContentProperty::CPL);
 760
 761         {
 762                 boost::mutex::scoped_lock lm (_mutex);
 763                 _cpl = id;
 764         }
 765 }
 766
 767 bool
 768 DCPContent::kdm_timing_window_valid () const
 769 {
 770         if (!_kdm) {
 771                 return true;
 772         }
 773
 774         dcp::LocalTime now;
 775         return _kdm->not_valid_before() < now && now < _kdm->not_valid_after();
 776 }
 777
 778
 779 Resolution
 780 DCPContent::resolution () const
 781 {
 782         if (video->size().width > 2048 || video->size().height > 1080) {
 783                 return RESOLUTION_4K;
 784         }
 785
 786         return RESOLUTION_2K;
 787 }
 788