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