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