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