src/lib/dcp_content.cc

   1 /*
   2     Copyright (C) 2014-2020 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #include "atmos_content.h"
  22 #include "dcp_content.h"
  23 #include "video_content.h"
  24 #include "audio_content.h"
  25 #include "dcp_examiner.h"
  26 #include "job.h"
  27 #include "film.h"
  28 #include "config.h"
  29 #include "overlaps.h"
  30 #include "compose.hpp"
  31 #include "dcp_decoder.h"
  32 #include "log.h"
  33 #include "dcpomatic_log.h"
  34 #include "text_content.h"
  35 #include <dcp/dcp.h>
  36 #include <dcp/raw_convert.h>
  37 #include <dcp/exceptions.h>
  38 #include <dcp/reel_closed_caption_asset.h>
  39 #include <dcp/reel_picture_asset.h>
  40 #include <dcp/reel_subtitle_asset.h>
  41 #include <dcp/reel.h>
  42 #include <libxml++/libxml++.h>
  43 #include <boost/foreach.hpp>
  44 #include <iterator>
  45 #include <iostream>
  46
  47 #include "i18n.h"
  48
  49 using std::string;
  50 using std::cout;
  51 using std::distance;
  52 using std::pair;
  53 using std::vector;
  54 using std::list;
  55 using std::map;
  56 using boost::shared_ptr;
  57 using boost::scoped_ptr;
  58 using boost::optional;
  59 using boost::function;
  60 using boost::dynamic_pointer_cast;
  61 #if BOOST_VERSION >= 106100
  62 using namespace boost::placeholders;
  63 #endif
  64 using dcp::raw_convert;
  65 using namespace dcpomatic;
  66
  67 int const DCPContentProperty::NEEDS_ASSETS       = 600;
  68 int const DCPContentProperty::NEEDS_KDM          = 601;
  69 int const DCPContentProperty::REFERENCE_VIDEO    = 602;
  70 int const DCPContentProperty::REFERENCE_AUDIO    = 603;
  71 int const DCPContentProperty::REFERENCE_TEXT     = 604;
  72 int const DCPContentProperty::NAME               = 605;
  73 int const DCPContentProperty::TEXTS              = 606;
  74 int const DCPContentProperty::CPL                = 607;
  75
  76 DCPContent::DCPContent (boost::filesystem::path p)
  77         : _encrypted (false)
  78         , _needs_assets (false)
  79         , _kdm_valid (false)
  80         , _reference_video (false)
  81         , _reference_audio (false)
  82         , _three_d (false)
  83 {
  84         LOG_GENERAL ("Creating DCP content from %1", p.string());
  85
  86         read_directory (p);
  87         set_default_colour_conversion ();
  88
  89         for (int i = 0; i < TEXT_COUNT; ++i) {
  90                 _reference_text[i] = false;
  91         }
  92 }
  93
  94 DCPContent::DCPContent (cxml::ConstNodePtr node, int version)
  95         : Content (node)
  96 {
  97         video = VideoContent::from_xml (this, node, version);
  98         audio = AudioContent::from_xml (this, node, version);
  99         text = TextContent::from_xml (this, node, version);
 100         atmos = AtmosContent::from_xml (this, node);
 101
 102         for (int i = 0; i < TEXT_COUNT; ++i) {
 103                 _reference_text[i] = false;
 104         }
 105
 106         if (video && audio) {
 107                 audio->set_stream (
 108                         AudioStreamPtr (
 109                                 new AudioStream (
 110                                         node->number_child<int> ("AudioFrameRate"),
 111                                         /* AudioLength was not present in some old metadata versions */
 112                                         node->optional_number_child<Frame>("AudioLength").get_value_or (
 113                                                 video->length() * node->number_child<int>("AudioFrameRate") / video_frame_rate().get()
 114                                                 ),
 115                                         AudioMapping (node->node_child ("AudioMapping"), version)
 116                                         )
 117                                 )
 118                         );
 119         }
 120
 121         _name = node->string_child ("Name");
 122         _encrypted = node->bool_child ("Encrypted");
 123         _needs_assets = node->optional_bool_child("NeedsAssets").get_value_or (false);
 124         if (node->optional_node_child ("KDM")) {
 125                 _kdm = dcp::EncryptedKDM (node->string_child ("KDM"));
 126         }
 127         _kdm_valid = node->bool_child ("KDMValid");
 128         _reference_video = node->optional_bool_child ("ReferenceVideo").get_value_or (false);
 129         _reference_audio = node->optional_bool_child ("ReferenceAudio").get_value_or (false);
 130         if (version >= 37) {
 131                 _reference_text[TEXT_OPEN_SUBTITLE] = node->optional_bool_child("ReferenceOpenSubtitle").get_value_or(false);
 132                 _reference_text[TEXT_CLOSED_CAPTION] = node->optional_bool_child("ReferenceClosedCaption").get_value_or(false);
 133         } else {
 134                 _reference_text[TEXT_OPEN_SUBTITLE] = node->optional_bool_child("ReferenceSubtitle").get_value_or(false);
 135                 _reference_text[TEXT_CLOSED_CAPTION] = false;
 136         }
 137         if (node->optional_string_child("Standard")) {
 138                 string const s = node->optional_string_child("Standard").get();
 139                 if (s == "Interop") {
 140                         _standard = dcp::INTEROP;
 141                 } else if (s == "SMPTE") {
 142                         _standard = dcp::SMPTE;
 143                 } else {
 144                         DCPOMATIC_ASSERT (false);
 145                 }
 146         }
 147         _three_d = node->optional_bool_child("ThreeD").get_value_or (false);
 148
 149         optional<string> ck = node->optional_string_child("ContentKind");
 150         if (ck) {
 151                 _content_kind = dcp::content_kind_from_string (*ck);
 152         }
 153         _cpl = node->optional_string_child("CPL");
 154         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("ReelLength")) {
 155                 _reel_lengths.push_back (raw_convert<int64_t> (i->content ()));
 156         }
 157
 158         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("Marker")) {
 159                 _markers[dcp::marker_from_string(i->string_attribute("type"))] = ContentTime(raw_convert<int64_t>(i->content()));
 160         }
 161
 162         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("Rating")) {
 163                 _ratings.push_back (dcp::Rating(i));
 164         }
 165
 166         BOOST_FOREACH (cxml::ConstNodePtr i, node->node_children("ContentVersion")) {
 167                 _content_versions.push_back (i->content());
 168         }
 169 }
 170
 171 void
 172 DCPContent::read_directory (boost::filesystem::path p)
 173 {
 174         using namespace boost::filesystem;
 175
 176         bool have_assetmap = false;
 177         bool have_metadata = false;
 178
 179         for (directory_iterator i(p); i != directory_iterator(); ++i) {
 180                 if (i->path().filename() == "ASSETMAP" || i->path().filename() == "ASSETMAP.xml") {
 181                         have_assetmap = true;
 182                 } else if (i->path().filename() == "metadata.xml") {
 183                         have_metadata = true;
 184                 }
 185         }
 186
 187         if (!have_assetmap) {
 188                 if (!have_metadata) {
 189                         throw DCPError ("No ASSETMAP or ASSETMAP.xml file found: is this a DCP?");
 190                 } else {
 191                         throw DCPError (
 192                                 "This looks like a DCP-o-matic project folder, which cannot be added to a different project.  "
 193                                 "Choose the DCP directory inside the DCP-o-matic project folder if that's what you want to import."
 194                                 );
 195                 }
 196         }
 197
 198         read_sub_directory (p);
 199 }
 200
 201 void
 202 DCPContent::read_sub_directory (boost::filesystem::path p)
 203 {
 204         LOG_GENERAL ("DCPContent::read_sub_directory reads %1", p.string());
 205         for (boost::filesystem::directory_iterator i(p); i != boost::filesystem::directory_iterator(); ++i) {
 206                 if (boost::filesystem::is_regular_file (i->path())) {
 207                         LOG_GENERAL ("Inside there's regular file %1", i->path().string());
 208                         add_path (i->path());
 209                 } else if (boost::filesystem::is_directory (i->path ())) {
 210                         LOG_GENERAL ("Inside there's directory %1", i->path().string());
 211                         read_sub_directory (i->path());
 212                 }
 213         }
 214 }
 215
 216 /** @param film Film, or 0 */
 217 void
 218 DCPContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
 219 {
 220         bool const needed_assets = needs_assets ();
 221         bool const needed_kdm = needs_kdm ();
 222         string const old_name = name ();
 223
 224         ChangeSignaller<Content> cc_texts (this, DCPContentProperty::TEXTS);
 225         ChangeSignaller<Content> cc_assets (this, DCPContentProperty::NEEDS_ASSETS);
 226         ChangeSignaller<Content> cc_kdm (this, DCPContentProperty::NEEDS_KDM);
 227         ChangeSignaller<Content> cc_name (this, DCPContentProperty::NAME);
 228
 229         if (job) {
 230                 job->set_progress_unknown ();
 231         }
 232         Content::examine (film, job);
 233
 234         shared_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film ? film->tolerant() : true));
 235
 236         if (examiner->has_video()) {
 237                 {
 238                         boost::mutex::scoped_lock lm (_mutex);
 239                         video.reset (new VideoContent (this));
 240                 }
 241                 video->take_from_examiner (examiner);
 242                 set_default_colour_conversion ();
 243         }
 244
 245         if (examiner->has_audio()) {
 246                 {
 247                         boost::mutex::scoped_lock lm (_mutex);
 248                         audio.reset (new AudioContent (this));
 249                 }
 250                 AudioStreamPtr as (new AudioStream (examiner->audio_frame_rate(), examiner->audio_length(), examiner->audio_channels()));
 251                 audio->set_stream (as);
 252                 AudioMapping m = as->mapping ();
 253                 m.make_default (film ? film->audio_processor() : 0);
 254                 as->set_mapping (m);
 255         }
 256
 257         if (examiner->has_atmos()) {
 258                 {
 259                         boost::mutex::scoped_lock lm (_mutex);
 260                         atmos.reset (new AtmosContent(this));
 261                 }
 262                 /* Setting length will cause calculations to be made based on edit rate, so that must
 263                  * be set up first otherwise hard-to-spot exceptions will be thrown.
 264                  */
 265                 atmos->set_edit_rate (examiner->atmos_edit_rate());
 266                 atmos->set_length (examiner->atmos_length());
 267         }
 268
 269         list<shared_ptr<TextContent> > new_text;
 270         for (int i = 0; i < TEXT_COUNT; ++i) {
 271                 for (int j = 0; j < examiner->text_count(static_cast<TextType>(i)); ++j) {
 272                         shared_ptr<TextContent> c(new TextContent(this, static_cast<TextType>(i), static_cast<TextType>(i)));
 273                         if (i == TEXT_CLOSED_CAPTION) {
 274                                 c->set_dcp_track (examiner->dcp_text_track(j));
 275                         }
 276                         new_text.push_back (c);
 277                 }
 278         }
 279
 280         {
 281                 boost::mutex::scoped_lock lm (_mutex);
 282                 text = new_text;
 283                 _name = examiner->name ();
 284                 _encrypted = examiner->encrypted ();
 285                 _needs_assets = examiner->needs_assets ();
 286                 _kdm_valid = examiner->kdm_valid ();
 287                 _standard = examiner->standard ();
 288                 _three_d = examiner->three_d ();
 289                 _content_kind = examiner->content_kind ();
 290                 _cpl = examiner->cpl ();
 291                 _reel_lengths = examiner->reel_lengths ();
 292                 map<dcp::Marker, dcp::Time> markers = examiner->markers();
 293                 for (map<dcp::Marker, dcp::Time>::const_iterator i = markers.begin(); i != markers.end(); ++i) {
 294                         _markers[i->first] = ContentTime(i->second.as_editable_units(DCPTime::HZ));
 295                 }
 296                 _ratings = examiner->ratings ();
 297                 _content_versions = examiner->content_versions ();
 298         }
 299
 300         if (needed_assets == needs_assets()) {
 301                 cc_assets.abort ();
 302         }
 303
 304         if (needed_kdm == needs_kdm()) {
 305                 cc_kdm.abort ();
 306         }
 307
 308         if (old_name == name()) {
 309                 cc_name.abort ();
 310         }
 311
 312         if (video) {
 313                 video->set_frame_type (_three_d ? VIDEO_FRAME_TYPE_3D : VIDEO_FRAME_TYPE_2D);
 314         }
 315 }
 316
 317 string
 318 DCPContent::summary () const
 319 {
 320         boost::mutex::scoped_lock lm (_mutex);
 321         return String::compose (_("%1 [DCP]"), _name);
 322 }
 323
 324 string
 325 DCPContent::technical_summary () const
 326 {
 327         string s = Content::technical_summary() + " - ";
 328         if (video) {
 329                 s += video->technical_summary() + " - ";
 330         }
 331         if (audio) {
 332                 s += audio->technical_summary() + " - ";
 333         }
 334         return s;
 335 }
 336
 337 void
 338 DCPContent::as_xml (xmlpp::Node* node, bool with_paths) const
 339 {
 340         node->add_child("Type")->add_child_text ("DCP");
 341
 342         Content::as_xml (node, with_paths);
 343
 344         if (video) {
 345                 video->as_xml (node);
 346         }
 347
 348         if (audio) {
 349                 audio->as_xml (node);
 350                 node->add_child("AudioFrameRate")->add_child_text (raw_convert<string> (audio->stream()->frame_rate()));
 351                 node->add_child("AudioLength")->add_child_text (raw_convert<string> (audio->stream()->length()));
 352                 audio->stream()->mapping().as_xml (node->add_child("AudioMapping"));
 353         }
 354
 355         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 356                 i->as_xml (node);
 357         }
 358
 359         if (atmos) {
 360                 atmos->as_xml (node);
 361         }
 362
 363         boost::mutex::scoped_lock lm (_mutex);
 364         node->add_child("Name")->add_child_text (_name);
 365         node->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
 366         node->add_child("NeedsAssets")->add_child_text (_needs_assets ? "1" : "0");
 367         if (_kdm) {
 368                 node->add_child("KDM")->add_child_text (_kdm->as_xml ());
 369         }
 370         node->add_child("KDMValid")->add_child_text (_kdm_valid ? "1" : "0");
 371         node->add_child("ReferenceVideo")->add_child_text (_reference_video ? "1" : "0");
 372         node->add_child("ReferenceAudio")->add_child_text (_reference_audio ? "1" : "0");
 373         node->add_child("ReferenceOpenSubtitle")->add_child_text(_reference_text[TEXT_OPEN_SUBTITLE] ? "1" : "0");
 374         node->add_child("ReferenceClosedCaption")->add_child_text(_reference_text[TEXT_CLOSED_CAPTION] ? "1" : "0");
 375         if (_standard) {
 376                 switch (_standard.get ()) {
 377                 case dcp::INTEROP:
 378                         node->add_child("Standard")->add_child_text ("Interop");
 379                         break;
 380                 case dcp::SMPTE:
 381                         node->add_child("Standard")->add_child_text ("SMPTE");
 382                         break;
 383                 default:
 384                         DCPOMATIC_ASSERT (false);
 385                 }
 386         }
 387         node->add_child("ThreeD")->add_child_text (_three_d ? "1" : "0");
 388         if (_content_kind) {
 389                 node->add_child("ContentKind")->add_child_text(dcp::content_kind_to_string(*_content_kind));
 390         }
 391         if (_cpl) {
 392                 node->add_child("CPL")->add_child_text (_cpl.get ());
 393         }
 394         BOOST_FOREACH (int64_t i, _reel_lengths) {
 395                 node->add_child("ReelLength")->add_child_text (raw_convert<string> (i));
 396         }
 397
 398         for (map<dcp::Marker, ContentTime>::const_iterator i = _markers.begin(); i != _markers.end(); ++i) {
 399                 xmlpp::Element* marker = node->add_child("Marker");
 400                 marker->set_attribute("type", dcp::marker_to_string(i->first));
 401                 marker->add_child_text(raw_convert<string>(i->second.get()));
 402         }
 403
 404         BOOST_FOREACH (dcp::Rating i, _ratings) {
 405                 xmlpp::Element* rating = node->add_child("Rating");
 406                 i.as_xml (rating);
 407         }
 408
 409         BOOST_FOREACH (string i, _content_versions) {
 410                 node->add_child("ContentVersion")->add_child_text(i);
 411         }
 412 }
 413
 414 DCPTime
 415 DCPContent::full_length (shared_ptr<const Film> film) const
 416 {
 417         if (!video) {
 418                 return DCPTime();
 419         }
 420         FrameRateChange const frc (film, shared_from_this());
 421         return DCPTime::from_frames (llrint(video->length() * frc.factor()), film->video_frame_rate());
 422 }
 423
 424 DCPTime
 425 DCPContent::approximate_length () const
 426 {
 427         if (!video) {
 428                 return DCPTime();
 429         }
 430         return DCPTime::from_frames (video->length(), 24);
 431 }
 432
 433 string
 434 DCPContent::identifier () const
 435 {
 436         string s = Content::identifier() + "_";
 437
 438         if (video) {
 439                 s += video->identifier() + "_";
 440         }
 441
 442         BOOST_FOREACH (shared_ptr<TextContent> i, text) {
 443                 s += i->identifier () + " ";
 444         }
 445
 446         s += string (_reference_video ? "1" : "0");
 447         for (int i = 0; i < TEXT_COUNT; ++i) {
 448                 s += string (_reference_text[i] ? "1" : "0");
 449         }
 450         return s;
 451 }
 452
 453 void
 454 DCPContent::add_kdm (dcp::EncryptedKDM k)
 455 {
 456         _kdm = k;
 457 }
 458
 459 void
 460 DCPContent::add_ov (boost::filesystem::path ov)
 461 {
 462         read_directory (ov);
 463 }
 464
 465 bool
 466 DCPContent::can_be_played () const
 467 {
 468         return !needs_kdm() && !needs_assets();
 469 }
 470
 471 bool
 472 DCPContent::needs_kdm () const
 473 {
 474         boost::mutex::scoped_lock lm (_mutex);
 475         return _encrypted && !_kdm_valid;
 476 }
 477
 478 bool
 479 DCPContent::needs_assets () const
 480 {
 481         boost::mutex::scoped_lock lm (_mutex);
 482         return _needs_assets;
 483 }
 484
 485 vector<boost::filesystem::path>
 486 DCPContent::directories () const
 487 {
 488         return dcp::DCP::directories_from_files (paths());
 489 }
 490
 491 void
 492 DCPContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 493 {
 494         Content::add_properties (film, p);
 495         if (video) {
 496                 video->add_properties (p);
 497         }
 498         if (audio) {
 499                 audio->add_properties (film, p);
 500         }
 501 }
 502
 503 void
 504 DCPContent::set_default_colour_conversion ()
 505 {
 506         /* Default to no colour conversion for DCPs */
 507         if (video) {
 508                 video->unset_colour_conversion ();
 509         }
 510 }
 511
 512 void
 513 DCPContent::set_reference_video (bool r)
 514 {
 515         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_VIDEO);
 516
 517         {
 518                 boost::mutex::scoped_lock lm (_mutex);
 519                 _reference_video = r;
 520         }
 521 }
 522
 523 void
 524 DCPContent::set_reference_audio (bool r)
 525 {
 526         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_AUDIO);
 527
 528         {
 529                 boost::mutex::scoped_lock lm (_mutex);
 530                 _reference_audio = r;
 531         }
 532 }
 533
 534 void
 535 DCPContent::set_reference_text (TextType type, bool r)
 536 {
 537         ChangeSignaller<Content> cc (this, DCPContentProperty::REFERENCE_TEXT);
 538
 539         {
 540                 boost::mutex::scoped_lock lm (_mutex);
 541                 _reference_text[type] = r;
 542         }
 543 }
 544
 545 list<DCPTimePeriod>
 546 DCPContent::reels (shared_ptr<const Film> film) const
 547 {
 548         list<int64_t> reel_lengths = _reel_lengths;
 549         if (reel_lengths.empty ()) {
 550                 /* Old metadata with no reel lengths; get them here instead */
 551                 try {
 552                         scoped_ptr<DCPExaminer> examiner (new DCPExaminer(shared_from_this(), film->tolerant()));
 553                         reel_lengths = examiner->reel_lengths ();
 554                 } catch (...) {
 555                         /* Could not examine the DCP; guess reels */
 556                         reel_lengths.push_back (length_after_trim(film).frames_round(film->video_frame_rate()));
 557                 }
 558         }
 559
 560         list<DCPTimePeriod> p;
 561
 562         /* This content's frame rate must be the same as the output DCP rate, so we can
 563            convert `directly' from ContentTime to DCPTime.
 564         */
 565
 566         /* The starting point of this content on the timeline */
 567         DCPTime pos = position() - DCPTime (trim_start().get());
 568
 569         BOOST_FOREACH (int64_t i, reel_lengths) {
 570                 /* This reel runs from `pos' to `to' */
 571                 DCPTime const to = pos + DCPTime::from_frames (i, film->video_frame_rate());
 572                 if (to > position()) {
 573                         p.push_back (DCPTimePeriod (max(position(), pos), min(end(film), to)));
 574                         if (to > end(film)) {
 575                                 break;
 576                         }
 577                 }
 578                 pos = to;
 579         }
 580
 581         return p;
 582 }
 583
 584 list<DCPTime>
 585 DCPContent::reel_split_points (shared_ptr<const Film> film) const
 586 {
 587         list<DCPTime> s;
 588         BOOST_FOREACH (DCPTimePeriod i, reels(film)) {
 589                 s.push_back (i.from);
 590         }
 591         return s;
 592 }
 593
 594 bool
 595 DCPContent::can_reference (shared_ptr<const Film> film, function<bool (shared_ptr<const Content>)> part, string overlapping, string& why_not) const
 596 {
 597         /* We must be using the same standard as the film */
 598         if (_standard) {
 599                 if (_standard.get() == dcp::INTEROP && !film->interop()) {
 600                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 601                         why_not = _("it is Interop and the film is set to SMPTE.");
 602                         return false;
 603                 } else if (_standard.get() == dcp::SMPTE && film->interop()) {
 604                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 605                         why_not = _("it is SMPTE and the film is set to Interop.");
 606                         return false;
 607                 }
 608         }
 609
 610         /* And the same frame rate */
 611         if (!video_frame_rate() || (lrint(video_frame_rate().get()) != film->video_frame_rate())) {
 612                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 613                 why_not = _("it has a different frame rate to the film.");
 614                 return false;
 615         }
 616
 617         list<DCPTimePeriod> const fr = film->reels ();
 618
 619         list<DCPTimePeriod> reel_list;
 620         try {
 621                 reel_list = reels (film);
 622         } catch (dcp::ReadError &) {
 623                 /* We couldn't read the DCP; it's probably missing */
 624                 return false;
 625         } catch (dcp::KDMDecryptionError &) {
 626                 /* We have an incorrect KDM */
 627                 return false;
 628         }
 629
 630         /* fr must contain reels().  It can also contain other reels, but it must at
 631            least contain reels().
 632         */
 633         BOOST_FOREACH (DCPTimePeriod i, reel_list) {
 634                 if (find (fr.begin(), fr.end(), i) == fr.end ()) {
 635                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 636                         why_not = _("its reel lengths differ from those in the film; set the reel mode to 'split by video content'.");
 637                         return false;
 638                 }
 639         }
 640
 641         ContentList a = overlaps (film, film->content(), part, position(), end(film));
 642         if (a.size() != 1 || a.front().get() != this) {
 643                 why_not = overlapping;
 644                 return false;
 645         }
 646
 647         return true;
 648 }
 649
 650 static
 651 bool check_video (shared_ptr<const Content> c)
 652 {
 653         return static_cast<bool>(c->video) && c->video->use();
 654 }
 655
 656 bool
 657 DCPContent::can_reference_video (shared_ptr<const Film> film, string& why_not) const
 658 {
 659         if (!video) {
 660                 why_not = _("There is no video in this DCP");
 661                 return false;
 662         }
 663
 664         if (film->resolution() != resolution()) {
 665                 if (resolution() == RESOLUTION_4K) {
 666                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 667                         why_not = _("it is 4K and the film is 2K.");
 668                 } else {
 669                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 670                         why_not = _("it is 2K and the film is 4K.");
 671                 }
 672                 return false;
 673         } else if (film->frame_size() != video->size()) {
 674                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 675                 why_not = _("its video frame size differs from the film's.");
 676                 return false;
 677         }
 678
 679         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 680         return can_reference (film, bind (&check_video, _1), _("it overlaps other video content; remove the other content."), why_not);
 681 }
 682
 683 static
 684 bool check_audio (shared_ptr<const Content> c)
 685 {
 686         return static_cast<bool>(c->audio) && !c->audio->mapping().mapped_output_channels().empty();
 687 }
 688
 689 bool
 690 DCPContent::can_reference_audio (shared_ptr<const Film> film, string& why_not) const
 691 {
 692         shared_ptr<DCPDecoder> decoder;
 693         try {
 694                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 695         } catch (dcp::ReadError &) {
 696                 /* We couldn't read the DCP, so it's probably missing */
 697                 return false;
 698         } catch (DCPError &) {
 699                 /* We couldn't read the DCP, so it's probably missing */
 700                 return false;
 701         } catch (dcp::KDMDecryptionError &) {
 702                 /* We have an incorrect KDM */
 703                 return false;
 704         }
 705
 706         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 707                 if (!i->main_sound()) {
 708                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 709                         why_not = _("it does not have sound in all its reels.");
 710                         return false;
 711                 }
 712         }
 713
 714         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 715         return can_reference (film, bind (&check_audio, _1), _("it overlaps other audio content; remove the other content."), why_not);
 716 }
 717
 718 static
 719 bool check_text (shared_ptr<const Content> c)
 720 {
 721         return !c->text.empty();
 722 }
 723
 724 bool
 725 DCPContent::can_reference_text (shared_ptr<const Film> film, TextType type, string& why_not) const
 726 {
 727         shared_ptr<DCPDecoder> decoder;
 728         try {
 729                 decoder.reset (new DCPDecoder (film, shared_from_this(), false, film->tolerant(), shared_ptr<DCPDecoder>()));
 730         } catch (dcp::ReadError &) {
 731                 /* We couldn't read the DCP, so it's probably missing */
 732                 return false;
 733         } catch (dcp::KDMDecryptionError &) {
 734                 /* We have an incorrect KDM */
 735                 return false;
 736         }
 737
 738         BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
 739                 if (type == TEXT_OPEN_SUBTITLE) {
 740                         if (!i->main_subtitle()) {
 741                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 742                                 why_not = _("it does not have open subtitles in all its reels.");
 743                                 return false;
 744                         } else if (i->main_subtitle()->entry_point().get_value_or(0) != 0) {
 745                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 746                                 why_not = _("one if its subtitle reels has a non-zero entry point so it must be re-written.");
 747                                 return false;
 748                         }
 749                 }
 750                 if (type == TEXT_CLOSED_CAPTION) {
 751                         if (i->closed_captions().empty()) {
 752                                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 753                                 why_not = _("it does not have closed captions in all its reels.");
 754                                 return false;
 755                         }
 756                         BOOST_FOREACH (shared_ptr<dcp::ReelClosedCaptionAsset> j, i->closed_captions()) {
 757                                 if (j->entry_point().get_value_or(0) != 0) {
 758                                         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 759                                         why_not = _("one if its closed caption has a non-zero entry point so it must be re-written.");
 760                                         return false;
 761                                 }
 762                         }
 763                 }
 764         }
 765
 766         if (trim_start() != dcpomatic::ContentTime()) {
 767                 /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 768                 why_not = _("it has a start trim so its subtitles or closed captions must be re-written.");
 769                 return false;
 770         }
 771
 772         /// TRANSLATORS: this string will follow "Cannot reference this DCP: "
 773         return can_reference (film, bind (&check_text, _1), _("it overlaps other text content; remove the other content."), why_not);
 774 }
 775
 776 void
 777 DCPContent::take_settings_from (shared_ptr<const Content> c)
 778 {
 779         shared_ptr<const DCPContent> dc = dynamic_pointer_cast<const DCPContent> (c);
 780         if (!dc) {
 781                 return;
 782         }
 783
 784         _reference_video = dc->_reference_video;
 785         _reference_audio = dc->_reference_audio;
 786         for (int i = 0; i < TEXT_COUNT; ++i) {
 787                 _reference_text[i] = dc->_reference_text[i];
 788         }
 789 }
 790
 791 void
 792 DCPContent::set_cpl (string id)
 793 {
 794         ChangeSignaller<Content> cc (this, DCPContentProperty::CPL);
 795
 796         {
 797                 boost::mutex::scoped_lock lm (_mutex);
 798                 _cpl = id;
 799         }
 800 }
 801
 802 bool
 803 DCPContent::kdm_timing_window_valid () const
 804 {
 805         if (!_kdm) {
 806                 return true;
 807         }
 808
 809         dcp::LocalTime now;
 810         return _kdm->not_valid_before() < now && now < _kdm->not_valid_after();
 811 }
 812
 813
 814 Resolution
 815 DCPContent::resolution () const
 816 {
 817         if (video->size().width > 2048 || video->size().height > 1080) {
 818                 return RESOLUTION_4K;
 819         }
 820
 821         return RESOLUTION_2K;
 822 }
 823