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 "dcp_content.h"
  22 #include "video_content.h"
  23 #include "audio_content.h"
  24 #include "dcp_examiner.h"
  25 #include "job.h"
  26 #include "film.h"
  27 #include "config.h"
  28 #include "overlaps.h"
  29 #include "compose.hpp"
  30 #include "dcp_decoder.h"
  31 #include "log.h"
  32 #include "dcpomatic_log.h"
  33 #include "text_content.h"
  34 #include <dcp/dcp.h>
  35 #include <dcp/raw_convert.h>
  36 #include <dcp/exceptions.h>
  37 #include <dcp/reel_picture_asset.h>
  38 #include <dcp/reel.h>
  39 #include <libxml++/libxml++.h>
  40 #include <boost/foreach.hpp>
  41 #include <iterator>
  42 #include <iostream>
  43
  44 #include "i18n.h"
  45
  46 using std::string;
  47 using std::cout;
  48 using std::distance;
  49 using std::pair;
  50 using std::vector;
  51 using std::list;
  52 using std::map;
  53 using boost::shared_ptr;
  54 using boost::scoped_ptr;
  55 using boost::optional;
  56 using boost::function;
  57 using boost::dynamic_pointer_cast;
  58 using dcp::raw_convert;
  59 using namespace dcpomatic;
  60
  61 int const DCPContentProperty::NEEDS_ASSETS       = 600;
  62 int const DCPContentProperty::NEEDS_KDM          = 601;
  63 int const DCPContentProperty::REFERENCE_VIDEO    = 602;
  64 int const DCPContentProperty::REFERENCE_AUDIO    = 603;
  65 int const DCPContentProperty::REFERENCE_TEXT     = 604;
  66 int const DCPContentProperty::NAME               = 605;
  67 int const DCPContentProperty::TEXTS              = 606;
  68 int const DCPContentProperty::CPL                = 607;
  69
  70 DCPContent::DCPContent (boost::filesystem::path p)
  71         : _encrypted (false)
  72         , _needs_assets (false)
  73         , _kdm_valid (false)
  74         , _reference_video (false)
  75         , _reference_audio (false)
  76         , _three_d (false)
  77 {
  78         LOG_GENERAL ("Creating DCP content from %1", p.string());
  79
  80         read_directory (p);
  81         set_default_colour_conversion ();
  82
  83         for (int i = 0; i < TEXT_COUNT; ++i) {
  84                 _reference_text[i] = false;
  85         }
  86 }
  87
  88 DCPContent::DCPContent (cxml::ConstNodePtr node, int version)
  89         : Content (node)
  90 {
  91         video = VideoContent::from_xml (this, node, version);
  92         audio = AudioContent::from_xml (this, node, version);
  93         text = TextContent::from_xml (this, node, version);
  94
  95         for (int i = 0; i < TEXT_COUNT; ++i) {
  96                 _reference_text[i] = false;
  97         }
  98
  99         if (video && audio) {
 100                 audio->set_stream (
 101                         AudioStreamPtr (
 102                                 new AudioStream (
 103                                         node->number_child<int> ("AudioFrameRate"),
 104                                         /* AudioLength was not present in some old metadata versions */
 105                                         node->optional_number_child<Frame>("AudioLength").get_value_or (
 106                                                 video->length() * node->number_child<int>("AudioFrameRate") / video_frame_rate().get()
 107                                                 ),
 108                                         AudioMapping (node->node_child ("AudioMapping"), version)
 109                                         )
 110                                 )
 111                         );
 112         }
 113
 114         _name = node->string_child ("Name");
 115         _encrypted = node->bool_child ("Encrypted");
 116         _needs_assets = node->optional_bool_child("NeedsAssets").get_value_or (false);
 117         if (node->optional_node_child ("KDM")) {
 118                 _kdm = dcp::EncryptedKDM (node->string_child ("KDM"));
 119         }
 120         _kdm_valid = node->bool_child ("KDMValid");
 121         _reference_video = node->optional_bool_child ("ReferenceVideo").get_value_or (false);
 122         _reference_audio = node->optional_bool_child ("ReferenceAudio").get_value_or (false);
 123         if (version >= 37) {
 124                 _reference_text[TEXT_OPEN_SUBTITLE] = node->optional_bool_child("ReferenceOpenSubtitle").get_value_or(false);
 125                 _reference_text[TEXT_CLOSED_CAPTION] = node->optional_bool_child("ReferenceClosedCaption").get_value_or(false);
 126         } else {
 127                 _reference_text[TEXT_OPEN_SUBTITLE] = node->optional_bool_child("ReferenceSubtitle").get_value_or(false);
 128                 _reference_text[TEXT_CLOSED_CAPTION] = false;
 129         }
 130         if (node->optional_string_child("Standard")) {
 131                 string const s = node->optional_string_child("Standard").get();
 132                 if (s == "Interop") {
 133                         _standard = dcp::INTEROP;
 134                 } else if (s == "SMPTE") {
 135                         _standard = dcp::SMPTE;
 136                 } else {
 137                         DCPOMATIC_ASSERT (false);
 138                 }
 139         }
 140         _three_d = node->optional_bool_child("ThreeD").get_value_or (false);
 141
 142         optional<string> ck = node->optional_string_child("ContentKind");
 143         if (ck) {
 144                 _content_kind = dcp::content_kind_from_string (*ck);
 145         }
 146         _cpl = node->optional_string_child("CPL");
 147         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("ReelLength")) {
 148                 _reel_lengths.push_back (raw_convert<int64_t> (i->content ()));
 149         }
 150
 151         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("Marker")) {
 152                 _markers[dcp::marker_from_string(i->string_attribute("type"))] = ContentTime(raw_convert<int64_t>(i->content()));
 153         }
 154 }
 155
 156 void
 157 DCPContent::read_directory (boost::filesystem::path p)
 158 {
 159         read_sub_directory (p);
 160
 161         bool have_assetmap = false;
 162         BOOST_FOREACH (boost::filesystem::path i, paths()) {
 163                 if (i.filename() == "ASSETMAP" || i.filename() == "ASSETMAP.xml") {
 164                         have_assetmap = true;
 165                 }
 166         }
 167
 168         if (!have_assetmap) {
 169                 throw DCPError ("No ASSETMAP or ASSETMAP.xml file found: is this a DCP?");
 170         }
 171 }
 172
 173 void
 174 DCPContent::read_sub_directory (boost::filesystem::path p)
 175 {
 176         LOG_GENERAL ("DCPContent::read_sub_directory reads %1", p.string());
 177         for (boost::filesystem::directory_iterator i(p); i != boost::filesystem::directory_iterator(); ++i) {
 178                 if (boost::filesystem::is_regular_file (i->path())) {
 179                         LOG_GENERAL ("Inside there's regular file %1", i->path().string());
 180                         add_path (i->path());
 181                 } else if (boost::filesystem::is_directory (i->path ())) {
 182                         LOG_GENERAL ("Inside there's directory %1", i->path().string());
 183                         read_sub_directory (i->path());
 184                 }
 185         }
 186 }
 187
 188 /** @param film Film, or 0 */
 189 void
 190 DCPContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
 191 {
 192         bool const needed_assets = needs_assets ();
 193         bool const needed_kdm = needs_kdm ();
 194         string const old_name = name ();
 195         int const old_texts = text.size ();
 196
 197         ChangeSignaller<Content> cc_texts (this, DCPContentProperty::TEXTS);
 198         ChangeSignaller<Content> cc_assets (this, DCPContentProperty::NEEDS_ASSETS);
 199         ChangeSignaller<Content> cc_kdm (this, DCPContentProperty::NEEDS_KDM);
 200         ChangeSignaller<Content> cc_name (this, DCPContentProperty::NAME);
 201
 202         if (job) {
 203                 job->set_progress_unknown ();
 204         }
 205         Content::examine (film, job);
 206
 207         shared_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film ? film->tolerant() : true));
 208
 209         if (examiner->has_video()) {
 210                 {
 211                         boost::mutex::scoped_lock lm (_mutex);
 212                         video.reset (new VideoContent (this));
 213                 }
 214                 video->take_from_examiner (examiner);
 215                 set_default_colour_conversion ();
 216         }
 217
 218         if (examiner->has_audio()) {
 219                 {
 220                         boost::mutex::scoped_lock lm (_mutex);
 221                         audio.reset (new AudioContent (this));
 222                 }
 223                 AudioStreamPtr as (new AudioStream (examiner->audio_frame_rate(), examiner->audio_length(), examiner->audio_channels()));
 224                 audio->set_stream (as);
 225                 AudioMapping m = as->mapping ();
 226                 m.make_default (film ? film->audio_processor() : 0);
 227                 as->set_mapping (m);
 228         }
 229
 230         int texts = 0;
 231         {
 232                 boost::mutex::scoped_lock lm (_mutex);
 233                 _name = examiner->name ();
 234                 for (int i = 0; i < TEXT_COUNT; ++i) {
 235                         for (int j = 0; j < examiner->text_count(static_cast<TextType>(i)); ++j) {
 236                                 text.push_back (shared_ptr<TextContent>(new TextContent(this, static_cast<TextType>(i), static_cast<TextType>(i))));
 237                         }
 238                 }
 239                 texts = text.size ();
 240                 _encrypted = examiner->encrypted ();
 241                 _needs_assets = examiner->needs_assets ();
 242                 _kdm_valid = examiner->kdm_valid ();
 243                 _standard = examiner->standard ();
 244                 _three_d = examiner->three_d ();
 245                 _content_kind = examiner->content_kind ();
 246                 _cpl = examiner->cpl ();
 247                 _reel_lengths = examiner->reel_lengths ();
 248                 map<dcp::Marker, dcp::Time> markers = examiner->markers();
 249                 for (map<dcp::Marker, dcp::Time>::const_iterator i = markers.begin(); i != markers.end(); ++i) {
 250                         _markers[i->first] = ContentTime(i->second.as_editable_units(DCPTime::HZ));
 251                 }
 252         }
 253
 254         if (old_texts == texts) {
 255                 cc_texts.abort ();
 256         }
 257
 258         if (needed_assets == needs_assets()) {
 259                 cc_assets.abort ();
 260         }
 261
 262         if (needed_kdm == needs_kdm()) {
 263                 cc_kdm.abort ();
 264         }
 265
 266         if (old_name == name()) {
 267                 cc_name.abort ();
 268         }
 269
 270         if (video) {
 271                 video->set_frame_type (_three_d ? VIDEO_FRAME_TYPE_3D : VIDEO_FRAME_TYPE_2D);
 272         }
 273 }
 274
 275 string
 276 DCPContent::summary () const
 277 {
 278         boost::mutex::scoped_lock lm (_mutex);
 279         return String::compose (_("%1 [DCP]"), _name);
 280 }
 281
 282 string
 283 DCPContent::technical_summary () const
 284 {
 285         string s = Content::technical_summary() + " - ";
 286         if (video) {
 287                 s += video->technical_summary() + " - ";
 288         }
 289         if (audio) {
 290                 s += audio->technical_summary() + " - ";
 291         }
 292         return s;
 293 }
 294
 295 void
 296 DCPContent::as_xml (xmlpp::Node* node, bool with_paths) const
 297 {
 298         node->add_child("Type")->add_child_text ("DCP");
 299
 300         Content::as_xml (node, with_paths);
 301
 302         if (video) {
 303                 video->as_xml (node);
 304         }
 305
 306         if (audio) {
 307                 audio->as_xml (node);
 308                 node->add_child("AudioFrameRate")->add_child_text (raw_convert<string> (audio->stream()->frame_rate()));
 309                 node->add_child("AudioLength")->add_child_text (raw_convert<string> (audio->stream()->length()));
 310                 audio->stream()->mapping().as_xml (node->add_child("AudioMapping"));
 311         }
 312
 313         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 314                 i->as_xml (node);
 315         }
 316
 317         boost::mutex::scoped_lock lm (_mutex);
 318         node->add_child("Name")->add_child_text (_name);
 319         node->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
 320         node->add_child("NeedsAssets")->add_child_text (_needs_assets ? "1" : "0");
 321         if (_kdm) {
 322                 node->add_child("KDM")->add_child_text (_kdm->as_xml ());
 323         }
 324         node->add_child("KDMValid")->add_child_text (_kdm_valid ? "1" : "0");
 325         node->add_child("ReferenceVideo")->add_child_text (_reference_video ? "1" : "0");
 326         node->add_child("ReferenceAudio")->add_child_text (_reference_audio ? "1" : "0");
 327         node->add_child("ReferenceOpenSubtitle")->add_child_text(_reference_text[TEXT_OPEN_SUBTITLE] ? "1" : "0");
 328         node->add_child("ReferenceClosedCaption")->add_child_text(_reference_text[TEXT_CLOSED_CAPTION] ? "1" : "0");
 329         if (_standard) {
 330                 switch (_standard.get ()) {
 331                 case dcp::INTEROP:
 332                         node->add_child("Standard")->add_child_text ("Interop");
 333                         break;
 334                 case dcp::SMPTE:
 335                         node->add_child("Standard")->add_child_text ("SMPTE");
 336                         break;
 337                 default:
 338                         DCPOMATIC_ASSERT (false);
 339                 }
 340         }
 341         node->add_child("ThreeD")->add_child_text (_three_d ? "1" : "0");
 342         if (_content_kind) {
 343                 node->add_child("ContentKind")->add_child_text(dcp::content_kind_to_string(*_content_kind));
 344         }
 345         if (_cpl) {
 346                 node->add_child("CPL")->add_child_text (_cpl.get ());
 347         }
 348         BOOST_FOREACH (int64_t i, _reel_lengths) {
 349                 node->add_child("ReelLength")->add_child_text (raw_convert<string> (i));
 350         }
 351
 352         for (map<dcp::Marker, ContentTime>::const_iterator i = _markers.begin(); i != _markers.end(); ++i) {
 353                 xmlpp::Element* marker = node->add_child("Marker");
 354                 marker->set_attribute("type", dcp::marker_to_string(i->first));
 355                 marker->add_child_text(raw_convert<string>(i->second.get()));
 356         }
 357 }
 358
 359 DCPTime
 360 DCPContent::full_length (shared_ptr<const Film> film) const
 361 {
 362         if (!video) {
 363                 return DCPTime();
 364         }
 365         FrameRateChange const frc (film, shared_from_this());
 366         return DCPTime::from_frames (llrint(video->length() * frc.factor()), film->video_frame_rate());
 367 }
 368
 369 DCPTime
 370 DCPContent::approximate_length () const
 371 {
 372         if (!video) {
 373                 return DCPTime();
 374         }
 375         return DCPTime::from_frames (video->length(), 24);
 376 }
 377
 378 string
 379 DCPContent::identifier () const
 380 {
 381         string s = Content::identifier() + "_";
 382
 383         if (video) {
 384                 s += video->identifier() + "_";
 385         }
 386
 387         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 388                 s += i->identifier () + " ";
 389         }
 390
 391         s += string (_reference_video ? "1" : "0");
 392         for (int i = 0; i < TEXT_COUNT; ++i) {
 393                 s += string (_reference_text[i] ? "1" : "0");
 394         }
 395         return s;
 396 }
 397
 398 void
 399 DCPContent::add_kdm (dcp::EncryptedKDM k)
 400 {
 401         _kdm = k;
 402 }
 403
 404 void
 405 DCPContent::add_ov (boost::filesystem::path ov)
 406 {
 407         read_directory (ov);
 408 }
 409
 410 bool
 411 DCPContent::can_be_played () const
 412 {
 413         return !needs_kdm() && !needs_assets();
 414 }
 415
 416 bool
 417 DCPContent::needs_kdm () const
 418 {
 419         boost::mutex::scoped_lock lm (_mutex);
 420         return _encrypted && !_kdm_valid;
 421 }
 422
 423 bool
 424 DCPContent::needs_assets () const
 425 {
 426         boost::mutex::scoped_lock lm (_mutex);
 427         return _needs_assets;
 428 }
 429
 430 vector<boost::filesystem::path>
 431 DCPContent::directories () const
 432 {
 433         return dcp::DCP::directories_from_files (paths());
 434 }
 435
 436 void
 437 DCPContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 438 {
 439         Content::add_properties (film, p);
 440         if (video) {
 441                 video->add_properties (p);
 442         }
 443         if (audio) {
 444                 audio->add_properties (film, p);
 445         }
 446 }
 447
 448 void
 449 DCPContent::set_default_colour_conversion ()
 450 {
 451         /* Default to no colour conversion for DCPs */
 452         if (video) {
 453                 video->unset_colour_conversion ();
 454         }
 455 }
 456
 457 void
 458 DCPContent::set_reference_video (bool r)
 459 {
 460         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_VIDEO);
 461
 462         {
 463                 boost::mutex::scoped_lock lm (_mutex);
 464                 _reference_video = r;
 465         }
 466 }
 467
 468 void
 469 DCPContent::set_reference_audio (bool r)
 470 {
 471         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_AUDIO);
 472
 473         {
 474                 boost::mutex::scoped_lock lm (_mutex);
 475                 _reference_audio = r;
 476         }
 477 }
 478
 479 void
 480 DCPContent::set_reference_text (TextType type, bool r)
 481 {
 482         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_TEXT);
 483
 484         {
 485                 boost::mutex::scoped_lock lm (_mutex);
 486                 _reference_text[type] = r;
 487         }
 488 }
 489
 490 list<DCPTimePeriod>
 491 DCPContent::reels (shared_ptr<const Film> film) const
 492 {
 493         list<int64_t> reel_lengths = _reel_lengths;
 494         if (reel_lengths.empty ()) {
 495                 /* Old metadata with no reel lengths; get them here instead */
 496                 try {
 497                         scoped_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film->tolerant()));
 498                         reel_lengths = examiner->reel_lengths ();
 499                 } catch (...) {
 500                         /* Could not examine the DCP; guess reels */
 501                         reel_lengths.push_back (length_after_trim(film).frames_round(film->video_frame_rate()));
 502                 }
 503         }
 504
 505         list<DCPTimePeriod> p;
 506
 507         /* This content's frame rate must be the same as the output DCP rate, so we can
 508            convert `directly' from ContentTime to DCPTime.
 509         */
 510
 511         /* The starting point of this content on the timeline */
 512         DCPTime pos = position() - DCPTime (trim_start().get());
 513
 514         BOOST_FOREACH (int64_t i, reel_lengths) {
 515                 /* This reel runs from `pos' to `to' */
 516                 DCPTime const to = pos + DCPTime::from_frames (i, film->video_frame_rate());
 517                 if (to > position()) {
 518                         p.push_back (DCPTimePeriod (max(position(), pos), min(end(film), to)));
 519                         if (to > end(film)) {
 520                                 break;
 521                         }
 522                 }
 523                 pos = to;
 524         }
 525
 526         return p;
 527 }
 528
 529 list<DCPTime>
 530 DCPContent::reel_split_points (shared_ptr<const Film> film) const
 531 {
 532         list<DCPTime> s;
 533         BOOST_FOREACH (DCPTimePeriod i, reels(film)) {
 534                 s.push_back (i.from);
 535         }
 536         return s;
 537 }
 538
 539 bool
 540 DCPContent::can_reference (shared_ptr<const Film> film, function<bool (shared_ptr<const Content>)> part, string overlapping, string& why_not) const
 541 {
 542         /* We must be using the same standard as the film */
 543         if (_standard) {
 544                 if (_standard.get() == dcp::INTEROP && !film->interop()) {
 545                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 546                         why_not = _("it is Interop and the film is set to SMPTE.");
 547                         return false;
 548                 } else if (_standard.get() == dcp::SMPTE && film->interop()) {
 549                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 550                         why_not = _("it is SMPTE and the film is set to Interop.");
 551                         return false;
 552                 }
 553         }
 554
 555         /* And the same frame rate */
 556         if (!video_frame_rate() || (lrint(video_frame_rate().get()) != film->video_frame_rate())) {
 557                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 558                 why_not = _("it has a different frame rate to the film.");
 559                 return false;
 560         }
 561
 562         list<DCPTimePeriod> const fr = film->reels ();
 563
 564         list<DCPTimePeriod> reel_list;
 565         try {
 566                 reel_list = reels (film);
 567         } catch (dcp::ReadError &) {
 568                 /* We couldn't read the DCP; it's probably missing */
 569                 return false;
 570         } catch (dcp::KDMDecryptionError &) {
 571                 /* We have an incorrect KDM */
 572                 return false;
 573         }
 574
 575         /* fr must contain reels().  It can also contain other reels, but it must at
 576            least contain reels().
 577         */
 578         BOOST_FOREACH (DCPTimePeriod i, reel_list) {
 579                 if (find (fr.begin(), fr.end(), i) == fr.end ()) {
 580                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 581                         why_not = _("its reel lengths differ from those in the film; set the reel mode to 'split by video content'.");
 582                         return false;
 583                 }
 584         }
 585
 586         ContentList a = overlaps (film, film->content(), part, position(), end(film));
 587         if (a.size() != 1 || a.front().get() != this) {
 588                 why_not = overlapping;
 589                 return false;
 590         }
 591
 592         return true;
 593 }
 594
 595 static
 596 bool check_video (shared_ptr<const Content> c)
 597 {
 598         return static_cast<bool>(c->video);
 599 }
 600
 601 bool
 602 DCPContent::can_reference_video (shared_ptr<const Film> film, string& why_not) const
 603 {
 604         if (!video) {
 605                 why_not = _("There is no video in this DCP");
 606                 return false;
 607         }
 608
 609         Resolution video_res = RESOLUTION_2K;
 610         if (video->size().width > 2048 || video->size().height > 1080) {
 611                 video_res = RESOLUTION_4K;
 612         }
 613
 614         if (film->resolution() != video_res) {
 615                 if (video_res == RESOLUTION_4K) {
 616                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 617                         why_not = _("it is 4K and the film is 2K.");
 618                 } else {
 619                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 620                         why_not = _("it is 2K and the film is 4K.");
 621                 }
 622                 return false;
 623         } else if (film->frame_size() != video->size()) {
 624                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 625                 why_not = _("its video frame size differs from the film's.");
 626                 return false;
 627         }
 628
 629         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 630         return can_reference (film, bind (&check_video, _1), _("it overlaps other video content; remove the other content."), why_not);
 631 }
 632
 633 static
 634 bool check_audio (shared_ptr<const Content> c)
 635 {
 636         return static_cast<bool>(c->audio);
 637 }
 638
 639 bool
 640 DCPContent::can_reference_audio (shared_ptr<const Film> film, string& why_not) const
 641 {
 642         shared_ptr<DCPDecoder> decoder;
 643         try {
 644                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 645         } catch (dcp::ReadError &) {
 646                 /* We couldn't read the DCP, so it's probably missing */
 647                 return false;
 648         } catch (DCPError &) {
 649                 /* We couldn't read the DCP, so it's probably missing */
 650                 return false;
 651         } catch (dcp::KDMDecryptionError &) {
 652                 /* We have an incorrect KDM */
 653                 return false;
 654         }
 655
 656         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 657                 if (!i->main_sound()) {
 658                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 659                         why_not = _("it does not have sound in all its reels.");
 660                         return false;
 661                 }
 662         }
 663
 664         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 665         return can_reference (film, bind (&check_audio, _1), _("it overlaps other audio content; remove the other content."), why_not);
 666 }
 667
 668 static
 669 bool check_text (shared_ptr<const Content> c)
 670 {
 671         return !c->text.empty();
 672 }
 673
 674 bool
 675 DCPContent::can_reference_text (shared_ptr<const Film> film, TextType type, string& why_not) const
 676 {
 677         shared_ptr<DCPDecoder> decoder;
 678         try {
 679                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 680         } catch (dcp::ReadError &) {
 681                 /* We couldn't read the DCP, so it's probably missing */
 682                 return false;
 683         } catch (dcp::KDMDecryptionError &) {
 684                 /* We have an incorrect KDM */
 685                 return false;
 686         }
 687
 688         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 689                 if (type == TEXT_OPEN_SUBTITLE && !i->main_subtitle()) {
 690                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 691                         why_not = _("it does not have open subtitles in all its reels.");
 692                         return false;
 693                 }
 694                 if (type == TEXT_CLOSED_CAPTION && i->closed_captions().empty()) {
 695                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 696                         why_not = _("it does not have closed captions in all its reels.");
 697                         return false;
 698                 }
 699         }
 700
 701         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 702         return can_reference (film, bind (&check_text, _1), _("it overlaps other text content; remove the other content."), why_not);
 703 }
 704
 705 void
 706 DCPContent::take_settings_from (shared_ptr<const Content> c)
 707 {
 708         shared_ptr<const DCPContent> dc = dynamic_pointer_cast<const DCPContent> (c);
 709         if (!dc) {
 710                 return;
 711         }
 712
 713         _reference_video = dc->_reference_video;
 714         _reference_audio = dc->_reference_audio;
 715         for (int i = 0; i < TEXT_COUNT; ++i) {
 716                 _reference_text[i] = dc->_reference_text[i];
 717         }
 718 }
 719
 720 void
 721 DCPContent::set_cpl (string id)
 722 {
 723         ChangeSignaller<Content> cc (this, DCPContentProperty::CPL);
 724
 725         {
 726                 boost::mutex::scoped_lock lm (_mutex);
 727                 _cpl = id;
 728         }
 729 }
 730
 731 bool
 732 DCPContent::kdm_timing_window_valid () const
 733 {
 734         if (!_kdm) {
 735                 return true;
 736         }
 737
 738         dcp::LocalTime now;
 739         return _kdm->not_valid_before() < now && now < _kdm->not_valid_after();
 740 }