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