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