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