src/lib/dcp_content.cc

   1 /*
   2     Copyright (C) 2014-2018 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 "text_content.h"
  33 #include <dcp/dcp.h>
  34 #include <dcp/raw_convert.h>
  35 #include <dcp/exceptions.h>
  36 #include <dcp/reel_picture_asset.h>
  37 #include <dcp/reel.h>
  38 #include <libxml++/libxml++.h>
  39 #include <boost/foreach.hpp>
  40 #include <iterator>
  41 #include <iostream>
  42
  43 #include "i18n.h"
  44
  45 using std::string;
  46 using std::cout;
  47 using std::distance;
  48 using std::pair;
  49 using std::vector;
  50 using std::list;
  51 using boost::shared_ptr;
  52 using boost::scoped_ptr;
  53 using boost::optional;
  54 using boost::function;
  55 using boost::dynamic_pointer_cast;
  56 using dcp::raw_convert;
  57
  58 int const DCPContentProperty::NEEDS_ASSETS       = 600;
  59 int const DCPContentProperty::NEEDS_KDM          = 601;
  60 int const DCPContentProperty::REFERENCE_VIDEO    = 602;
  61 int const DCPContentProperty::REFERENCE_AUDIO    = 603;
  62 int const DCPContentProperty::REFERENCE_TEXT     = 604;
  63 int const DCPContentProperty::NAME               = 605;
  64 int const DCPContentProperty::TEXTS              = 606;
  65 int const DCPContentProperty::CPL                = 607;
  66
  67 #define LOG_GENERAL(...) this->film()->log()->log(String::compose(__VA_ARGS__), LogEntry::TYPE_GENERAL);
  68
  69 DCPContent::DCPContent (shared_ptr<const Film> film, boost::filesystem::path p)
  70         : Content (film)
  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 (shared_ptr<const Film> film, cxml::ConstNodePtr node, int version)
  89         : Content (film, 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
 152 void
 153 DCPContent::read_directory (boost::filesystem::path p)
 154 {
 155         LOG_GENERAL ("DCPContent::read_directory reads %1", p.string());
 156         for (boost::filesystem::directory_iterator i(p); i != boost::filesystem::directory_iterator(); ++i) {
 157                 if (boost::filesystem::is_regular_file (i->path())) {
 158                         LOG_GENERAL ("Inside there's regular file %1", i->path().string());
 159                         add_path (i->path());
 160                 } else if (boost::filesystem::is_directory (i->path ())) {
 161                         LOG_GENERAL ("Inside there's directory %1", i->path().string());
 162                         read_directory (i->path());
 163                 }
 164         }
 165 }
 166
 167 void
 168 DCPContent::examine (shared_ptr<Job> job)
 169 {
 170         bool const needed_assets = needs_assets ();
 171         bool const needed_kdm = needs_kdm ();
 172         string const old_name = name ();
 173         int const old_texts = text.size ();
 174
 175         ChangeSignaller<Content> cc_texts (this, DCPContentProperty::TEXTS);
 176         ChangeSignaller<Content> cc_assets (this, DCPContentProperty::NEEDS_ASSETS);
 177         ChangeSignaller<Content> cc_kdm (this, DCPContentProperty::NEEDS_KDM);
 178         ChangeSignaller<Content> cc_name (this, DCPContentProperty::NAME);
 179         ChangeSignaller<Content> cc_streams (this, AudioContentProperty::STREAMS);
 180
 181         if (job) {
 182                 job->set_progress_unknown ();
 183         }
 184         Content::examine (job);
 185
 186         shared_ptr<DCPExaminer> examiner (new DCPExaminer (shared_from_this ()));
 187
 188         if (examiner->has_video()) {
 189                 {
 190                         boost::mutex::scoped_lock lm (_mutex);
 191                         video.reset (new VideoContent (this));
 192                 }
 193                 video->take_from_examiner (examiner);
 194                 set_default_colour_conversion ();
 195         }
 196
 197         if (examiner->has_audio()) {
 198                 ChangeSignaller<Content> cc (this, AudioContentProperty::STREAMS);
 199                 {
 200                         boost::mutex::scoped_lock lm (_mutex);
 201                         audio.reset (new AudioContent (this));
 202                 }
 203                 AudioStreamPtr as (new AudioStream (examiner->audio_frame_rate(), examiner->audio_length(), examiner->audio_channels()));
 204                 audio->set_stream (as);
 205                 AudioMapping m = as->mapping ();
 206                 film()->make_audio_mapping_default (m);
 207                 as->set_mapping (m);
 208         }
 209
 210         int texts = 0;
 211         {
 212                 boost::mutex::scoped_lock lm (_mutex);
 213                 _name = examiner->name ();
 214                 for (int i = 0; i < TEXT_COUNT; ++i) {
 215                         if (examiner->has_text(static_cast<TextType>(i))) {
 216                                 text.push_back (shared_ptr<TextContent>(new TextContent(this, static_cast<TextType>(i), static_cast<TextType>(i))));
 217                         }
 218                 }
 219                 texts = text.size ();
 220                 _encrypted = examiner->encrypted ();
 221                 _needs_assets = examiner->needs_assets ();
 222                 _kdm_valid = examiner->kdm_valid ();
 223                 _standard = examiner->standard ();
 224                 _three_d = examiner->three_d ();
 225                 _content_kind = examiner->content_kind ();
 226                 _cpl = examiner->cpl ();
 227                 _reel_lengths = examiner->reel_lengths ();
 228         }
 229
 230         if (old_texts == texts) {
 231                 cc_texts.abort ();
 232         }
 233
 234         if (needed_assets == needs_assets()) {
 235                 cc_assets.abort ();
 236         }
 237
 238         if (needed_kdm == needs_kdm()) {
 239                 cc_kdm.abort ();
 240         }
 241
 242         if (old_name == name()) {
 243                 cc_name.abort ();
 244         }
 245
 246         if (video) {
 247                 video->set_frame_type (_three_d ? VIDEO_FRAME_TYPE_3D : VIDEO_FRAME_TYPE_2D);
 248         }
 249 }
 250
 251 string
 252 DCPContent::summary () const
 253 {
 254         boost::mutex::scoped_lock lm (_mutex);
 255         return String::compose (_("%1 [DCP]"), _name);
 256 }
 257
 258 string
 259 DCPContent::technical_summary () const
 260 {
 261         string s = Content::technical_summary() + " - ";
 262         if (video) {
 263                 s += video->technical_summary() + " - ";
 264         }
 265         if (audio) {
 266                 s += audio->technical_summary() + " - ";
 267         }
 268         return s;
 269 }
 270
 271 void
 272 DCPContent::as_xml (xmlpp::Node* node, bool with_paths) const
 273 {
 274         node->add_child("Type")->add_child_text ("DCP");
 275
 276         Content::as_xml (node, with_paths);
 277
 278         if (video) {
 279                 video->as_xml (node);
 280         }
 281
 282         if (audio) {
 283                 audio->as_xml (node);
 284                 node->add_child("AudioFrameRate")->add_child_text (raw_convert<string> (audio->stream()->frame_rate()));
 285                 node->add_child("AudioLength")->add_child_text (raw_convert<string> (audio->stream()->length()));
 286                 audio->stream()->mapping().as_xml (node->add_child("AudioMapping"));
 287         }
 288
 289         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 290                 i->as_xml (node);
 291         }
 292
 293         boost::mutex::scoped_lock lm (_mutex);
 294         node->add_child("Name")->add_child_text (_name);
 295         node->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
 296         node->add_child("NeedsAssets")->add_child_text (_needs_assets ? "1" : "0");
 297         if (_kdm) {
 298                 node->add_child("KDM")->add_child_text (_kdm->as_xml ());
 299         }
 300         node->add_child("KDMValid")->add_child_text (_kdm_valid ? "1" : "0");
 301         node->add_child("ReferenceVideo")->add_child_text (_reference_video ? "1" : "0");
 302         node->add_child("ReferenceAudio")->add_child_text (_reference_audio ? "1" : "0");
 303         node->add_child("ReferenceOpenSubtitle")->add_child_text(_reference_text[TEXT_OPEN_SUBTITLE] ? "1" : "0");
 304         node->add_child("ReferenceClosedCaption")->add_child_text(_reference_text[TEXT_CLOSED_CAPTION] ? "1" : "0");
 305         if (_standard) {
 306                 switch (_standard.get ()) {
 307                 case dcp::INTEROP:
 308                         node->add_child("Standard")->add_child_text ("Interop");
 309                         break;
 310                 case dcp::SMPTE:
 311                         node->add_child("Standard")->add_child_text ("SMPTE");
 312                         break;
 313                 default:
 314                         DCPOMATIC_ASSERT (false);
 315                 }
 316         }
 317         node->add_child("ThreeD")->add_child_text (_three_d ? "1" : "0");
 318         if (_content_kind) {
 319                 node->add_child("ContentKind")->add_child_text(dcp::content_kind_to_string(*_content_kind));
 320         }
 321         if (_cpl) {
 322                 node->add_child("CPL")->add_child_text (_cpl.get ());
 323         }
 324         BOOST_FOREACH (int64_t i, _reel_lengths) {
 325                 node->add_child("ReelLength")->add_child_text (raw_convert<string> (i));
 326         }
 327 }
 328
 329 DCPTime
 330 DCPContent::full_length () const
 331 {
 332         if (!video) {
 333                 return DCPTime();
 334         }
 335         FrameRateChange const frc (active_video_frame_rate (), film()->video_frame_rate ());
 336         return DCPTime::from_frames (llrint (video->length () * frc.factor ()), film()->video_frame_rate ());
 337 }
 338
 339 string
 340 DCPContent::identifier () const
 341 {
 342         string s = Content::identifier() + "_";
 343
 344         if (video) {
 345                 s += video->identifier() + "_";
 346         }
 347
 348         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 349                 s += i->identifier () + " ";
 350         }
 351
 352         s += string (_reference_video ? "1" : "0");
 353         for (int i = 0; i < TEXT_COUNT; ++i) {
 354                 s += string (_reference_text[i] ? "1" : "0");
 355         }
 356         return s;
 357 }
 358
 359 void
 360 DCPContent::add_kdm (dcp::EncryptedKDM k)
 361 {
 362         _kdm = k;
 363 }
 364
 365 void
 366 DCPContent::add_ov (boost::filesystem::path ov)
 367 {
 368         read_directory (ov);
 369 }
 370
 371 bool
 372 DCPContent::can_be_played () const
 373 {
 374         return !needs_kdm() && !needs_assets();
 375 }
 376
 377 bool
 378 DCPContent::needs_kdm () const
 379 {
 380         boost::mutex::scoped_lock lm (_mutex);
 381         return _encrypted && !_kdm_valid;
 382 }
 383
 384 bool
 385 DCPContent::needs_assets () const
 386 {
 387         boost::mutex::scoped_lock lm (_mutex);
 388         return _needs_assets;
 389 }
 390
 391 vector<boost::filesystem::path>
 392 DCPContent::directories () const
 393 {
 394         return dcp::DCP::directories_from_files (paths());
 395 }
 396
 397 void
 398 DCPContent::add_properties (list<UserProperty>& p) const
 399 {
 400         Content::add_properties (p);
 401         if (video) {
 402                 video->add_properties (p);
 403         }
 404         if (audio) {
 405                 audio->add_properties (p);
 406         }
 407 }
 408
 409 void
 410 DCPContent::set_default_colour_conversion ()
 411 {
 412         /* Default to no colour conversion for DCPs */
 413         if (video) {
 414                 video->unset_colour_conversion ();
 415         }
 416 }
 417
 418 void
 419 DCPContent::set_reference_video (bool r)
 420 {
 421         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_VIDEO);
 422
 423         {
 424                 boost::mutex::scoped_lock lm (_mutex);
 425                 _reference_video = r;
 426         }
 427 }
 428
 429 void
 430 DCPContent::set_reference_audio (bool r)
 431 {
 432         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_AUDIO);
 433
 434         {
 435                 boost::mutex::scoped_lock lm (_mutex);
 436                 _reference_audio = r;
 437         }
 438 }
 439
 440 void
 441 DCPContent::set_reference_text (TextType type, bool r)
 442 {
 443         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_TEXT);
 444
 445         {
 446                 boost::mutex::scoped_lock lm (_mutex);
 447                 _reference_text[type] = r;
 448         }
 449 }
 450
 451 list<DCPTimePeriod>
 452 DCPContent::reels () const
 453 {
 454         list<int64_t> reel_lengths = _reel_lengths;
 455         if (reel_lengths.empty ()) {
 456                 /* Old metadata with no reel lengths; get them here instead */
 457                 try {
 458                         scoped_ptr<DCPExaminer> examiner (new DCPExaminer (shared_from_this()));
 459                         reel_lengths = examiner->reel_lengths ();
 460                 } catch (...) {
 461                         /* Could not examine the DCP; guess reels */
 462                         reel_lengths.push_back (length_after_trim().frames_round (film()->video_frame_rate ()));
 463                 }
 464         }
 465
 466         list<DCPTimePeriod> p;
 467
 468         /* This content's frame rate must be the same as the output DCP rate, so we can
 469            convert `directly' from ContentTime to DCPTime.
 470         */
 471
 472         /* The starting point of this content on the timeline */
 473         DCPTime pos = position() - DCPTime (trim_start().get());
 474
 475         BOOST_FOREACH (int64_t i, reel_lengths) {
 476                 /* This reel runs from `pos' to `to' */
 477                 DCPTime const to = pos + DCPTime::from_frames (i, film()->video_frame_rate());
 478                 if (to > position()) {
 479                         p.push_back (DCPTimePeriod (max(position(), pos), min(end(), to)));
 480                         if (to > end()) {
 481                                 break;
 482                         }
 483                 }
 484                 pos = to;
 485         }
 486
 487         return p;
 488 }
 489
 490 list<DCPTime>
 491 DCPContent::reel_split_points () const
 492 {
 493         list<DCPTime> s;
 494         BOOST_FOREACH (DCPTimePeriod i, reels()) {
 495                 s.push_back (i.from);
 496         }
 497         return s;
 498 }
 499
 500 bool
 501 DCPContent::can_reference (function<bool (shared_ptr<const Content>)> part, string overlapping, string& why_not) const
 502 {
 503         /* We must be using the same standard as the film */
 504         if (_standard) {
 505                 if (_standard.get() == dcp::INTEROP && !film()->interop()) {
 506                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 507                         why_not = _("it is Interop and the film is set to SMPTE.");
 508                         return false;
 509                 } else if (_standard.get() == dcp::SMPTE && film()->interop()) {
 510                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 511                         why_not = _("it is SMPTE and the film is set to Interop.");
 512                         return false;
 513                 }
 514         }
 515
 516         /* And the same frame rate */
 517         if (!video_frame_rate() || (lrint(video_frame_rate().get()) != film()->video_frame_rate())) {
 518                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 519                 why_not = _("it has a different frame rate to the film.");
 520                 return false;
 521         }
 522
 523         list<DCPTimePeriod> const fr = film()->reels ();
 524
 525         list<DCPTimePeriod> reel_list;
 526         try {
 527                 reel_list = reels ();
 528         } catch (dcp::DCPReadError) {
 529                 /* We couldn't read the DCP; it's probably missing */
 530                 return false;
 531         } catch (dcp::KDMDecryptionError) {
 532                 /* We have an incorrect KDM */
 533                 return false;
 534         }
 535
 536         /* fr must contain reels().  It can also contain other reels, but it must at
 537            least contain reels().
 538         */
 539         BOOST_FOREACH (DCPTimePeriod i, reel_list) {
 540                 if (find (fr.begin(), fr.end(), i) == fr.end ()) {
 541                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 542                         why_not = _("its reel lengths differ from those in the film; set the reel mode to 'split by video content'.");
 543                         return false;
 544                 }
 545         }
 546
 547         ContentList a = overlaps (film()->content(), part, position(), end());
 548         if (a.size() != 1 || a.front().get() != this) {
 549                 why_not = overlapping;
 550                 return false;
 551         }
 552
 553         return true;
 554 }
 555
 556 static
 557 bool check_video (shared_ptr<const Content> c)
 558 {
 559         return static_cast<bool>(c->video);
 560 }
 561
 562 bool
 563 DCPContent::can_reference_video (string& why_not) const
 564 {
 565         if (!video) {
 566                 why_not = _("There is no video in this DCP");
 567                 return false;
 568         }
 569
 570         Resolution video_res = RESOLUTION_2K;
 571         if (video->size().width > 2048 || video->size().height > 1080) {
 572                 video_res = RESOLUTION_4K;
 573         }
 574
 575         if (film()->resolution() != video_res) {
 576                 if (video_res == RESOLUTION_4K) {
 577                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 578                         why_not = _("it is 4K and the film is 2K.");
 579                 } else {
 580                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 581                         why_not = _("it is 2K and the film is 4K.");
 582                 }
 583                 return false;
 584         } else if (film()->frame_size() != video->size()) {
 585                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 586                 why_not = _("its video frame size differs from the film's.");
 587                 return false;
 588         }
 589
 590         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 591         return can_reference (bind (&check_video, _1), _("it overlaps other video content; remove the other content."), why_not);
 592 }
 593
 594 static
 595 bool check_audio (shared_ptr<const Content> c)
 596 {
 597         return static_cast<bool>(c->audio);
 598 }
 599
 600 bool
 601 DCPContent::can_reference_audio (string& why_not) const
 602 {
 603         shared_ptr<DCPDecoder> decoder;
 604         try {
 605                 decoder.reset (new DCPDecoder (shared_from_this(), film()->log(), false));
 606         } catch (dcp::DCPReadError) {
 607                 /* We couldn't read the DCP, so it's probably missing */
 608                 return false;
 609         } catch (DCPError) {
 610                 /* We couldn't read the DCP, so it's probably missing */
 611                 return false;
 612         } catch (dcp::KDMDecryptionError) {
 613                 /* We have an incorrect KDM */
 614                 return false;
 615         }
 616
 617         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 618                 if (!i->main_sound()) {
 619                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 620                         why_not = _("it does not have sound in all its reels.");
 621                         return false;
 622                 }
 623         }
 624
 625         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 626         return can_reference (bind (&check_audio, _1), _("it overlaps other audio content; remove the other content."), why_not);
 627 }
 628
 629 static
 630 bool check_text (shared_ptr<const Content> c)
 631 {
 632         return !c->text.empty();
 633 }
 634
 635 bool
 636 DCPContent::can_reference_text (TextType type, string& why_not) const
 637 {
 638         shared_ptr<DCPDecoder> decoder;
 639         try {
 640                 decoder.reset (new DCPDecoder (shared_from_this(), film()->log(), false));
 641         } catch (dcp::DCPReadError) {
 642                 /* We couldn't read the DCP, so it's probably missing */
 643                 return false;
 644         } catch (dcp::KDMDecryptionError) {
 645                 /* We have an incorrect KDM */
 646                 return false;
 647         }
 648
 649         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 650                 if (type == TEXT_OPEN_SUBTITLE && !i->main_subtitle()) {
 651                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 652                         why_not = _("it does not have open subtitles in all its reels.");
 653                         return false;
 654                 }
 655                 if (type == TEXT_CLOSED_CAPTION && i->closed_captions().empty()) {
 656                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 657                         why_not = _("it does not have closed captions in all its reels.");
 658                         return false;
 659                 }
 660         }
 661
 662         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 663         return can_reference (bind (&check_text, _1), _("it overlaps other text content; remove the other content."), why_not);
 664 }
 665
 666 void
 667 DCPContent::take_settings_from (shared_ptr<const Content> c)
 668 {
 669         shared_ptr<const DCPContent> dc = dynamic_pointer_cast<const DCPContent> (c);
 670         if (!dc) {
 671                 return;
 672         }
 673
 674         _reference_video = dc->_reference_video;
 675         _reference_audio = dc->_reference_audio;
 676         for (int i = 0; i < TEXT_COUNT; ++i) {
 677                 _reference_text[i] = dc->_reference_text[i];
 678         }
 679 }
 680
 681 void
 682 DCPContent::set_cpl (string id)
 683 {
 684         ChangeSignaller<Content> cc (this, DCPContentProperty::CPL);
 685
 686         {
 687                 boost::mutex::scoped_lock lm (_mutex);
 688                 _cpl = id;
 689         }
 690 }
 691
 692 bool
 693 DCPContent::kdm_timing_window_valid () const
 694 {
 695         if (!_kdm) {
 696                 return true;
 697         }
 698
 699         dcp::LocalTime now;
 700         return _kdm->not_valid_before() < now && now < _kdm->not_valid_after();
 701 }