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