2 Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
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.
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.
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/>.
23 #include "compose.hpp"
27 #include "dcpomatic_log.h"
28 #include "dcp_video.h"
29 #include "dcp_content_type.h"
30 #include "audio_mapping.h"
34 #include "audio_buffers.h"
36 #include "font_data.h"
38 #include "reel_writer.h"
39 #include "text_content.h"
41 #include <dcp/locale_convert.h>
42 #include <dcp/reel_file_asset.h>
51 /* OS X strikes again */
56 using std::dynamic_pointer_cast;
59 using std::make_shared;
64 using std::shared_ptr;
68 using boost::optional;
69 #if BOOST_VERSION >= 106100
70 using namespace boost::placeholders;
74 using namespace dcpomatic;
79 ignore_progress (float)
85 /** @param j Job to report progress to, or 0.
86 * @param text_only true to enable only the text (subtitle/ccap) parts of the writer.
88 Writer::Writer (weak_ptr<const Film> weak_film, weak_ptr<Job> j, bool text_only)
89 : WeakConstFilm (weak_film)
91 /* These will be reset to sensible values when J2KEncoder is created */
92 , _maximum_frames_in_memory (8)
93 , _maximum_queue_size (8)
94 , _text_only (text_only)
96 auto job = _job.lock ();
99 auto const reels = film()->reels();
100 for (auto p: reels) {
101 _reels.push_back (ReelWriter(weak_film, p, job, reel_index++, reels.size(), text_only));
104 _last_written.resize (reels.size());
106 /* We can keep track of the current audio, subtitle and closed caption reels easily because audio
107 and captions arrive to the Writer in sequence. This is not so for video.
109 _audio_reel = _reels.begin ();
110 _subtitle_reel = _reels.begin ();
111 for (auto i: film()->closed_caption_tracks()) {
112 _caption_reels[i] = _reels.begin ();
114 _atmos_reel = _reels.begin ();
116 /* Check that the signer is OK */
118 if (!Config::instance()->signer_chain()->valid(&reason)) {
119 throw InvalidSignerError (reason);
128 _thread = boost::thread (boost::bind(&Writer::thread, this));
129 #ifdef DCPOMATIC_LINUX
130 pthread_setname_np (_thread.native_handle(), "writer");
139 terminate_thread (false);
144 /** Pass a video frame to the writer for writing to disk at some point.
145 * This method can be called with frames out of order.
146 * @param encoded JPEG2000-encoded data.
147 * @param frame Frame index within the DCP.
148 * @param eyes Eyes that this frame image is for.
151 Writer::write (shared_ptr<const Data> encoded, Frame frame, Eyes eyes)
153 boost::mutex::scoped_lock lock (_state_mutex);
155 while (_queued_full_in_memory > _maximum_frames_in_memory) {
156 /* There are too many full frames in memory; wake the main writer thread and
157 wait until it sorts everything out */
158 _empty_condition.notify_all ();
159 _full_condition.wait (lock);
163 qi.type = QueueItem::Type::FULL;
164 qi.encoded = encoded;
165 qi.reel = video_reel (frame);
166 qi.frame = frame - _reels[qi.reel].start ();
168 if (film()->three_d() && eyes == Eyes::BOTH) {
169 /* 2D material in a 3D DCP; fake the 3D */
170 qi.eyes = Eyes::LEFT;
171 _queue.push_back (qi);
172 ++_queued_full_in_memory;
173 qi.eyes = Eyes::RIGHT;
174 _queue.push_back (qi);
175 ++_queued_full_in_memory;
178 _queue.push_back (qi);
179 ++_queued_full_in_memory;
182 /* Now there's something to do: wake anything wait()ing on _empty_condition */
183 _empty_condition.notify_all ();
188 Writer::can_repeat (Frame frame) const
190 return frame > _reels[video_reel(frame)].start();
194 /** Repeat the last frame that was written to a reel as a new frame.
195 * @param frame Frame index within the DCP of the new (repeated) frame.
196 * @param eyes Eyes that this repeated frame image is for.
199 Writer::repeat (Frame frame, Eyes eyes)
201 boost::mutex::scoped_lock lock (_state_mutex);
203 while (_queue.size() > _maximum_queue_size && have_sequenced_image_at_queue_head()) {
204 /* The queue is too big, and the main writer thread can run and fix it, so
205 wake it and wait until it has done.
207 _empty_condition.notify_all ();
208 _full_condition.wait (lock);
212 qi.type = QueueItem::Type::REPEAT;
213 qi.reel = video_reel (frame);
214 qi.frame = frame - _reels[qi.reel].start ();
215 if (film()->three_d() && eyes == Eyes::BOTH) {
216 qi.eyes = Eyes::LEFT;
217 _queue.push_back (qi);
218 qi.eyes = Eyes::RIGHT;
219 _queue.push_back (qi);
222 _queue.push_back (qi);
225 /* Now there's something to do: wake anything wait()ing on _empty_condition */
226 _empty_condition.notify_all ();
231 Writer::fake_write (Frame frame, Eyes eyes)
233 boost::mutex::scoped_lock lock (_state_mutex);
235 while (_queue.size() > _maximum_queue_size && have_sequenced_image_at_queue_head()) {
236 /* The queue is too big, and the main writer thread can run and fix it, so
237 wake it and wait until it has done.
239 _empty_condition.notify_all ();
240 _full_condition.wait (lock);
243 size_t const reel = video_reel (frame);
244 Frame const frame_in_reel = frame - _reels[reel].start ();
247 qi.type = QueueItem::Type::FAKE;
250 shared_ptr<InfoFileHandle> info_file = film()->info_file_handle(_reels[reel].period(), true);
251 qi.size = _reels[reel].read_frame_info(info_file, frame_in_reel, eyes).size;
255 qi.frame = frame_in_reel;
256 if (film()->three_d() && eyes == Eyes::BOTH) {
257 qi.eyes = Eyes::LEFT;
258 _queue.push_back (qi);
259 qi.eyes = Eyes::RIGHT;
260 _queue.push_back (qi);
263 _queue.push_back (qi);
266 /* Now there's something to do: wake anything wait()ing on _empty_condition */
267 _empty_condition.notify_all ();
271 /** Write some audio frames to the DCP.
272 * @param audio Audio data.
273 * @param time Time of this data within the DCP.
274 * This method is not thread safe.
277 Writer::write (shared_ptr<const AudioBuffers> audio, DCPTime const time)
279 DCPOMATIC_ASSERT (audio);
281 int const afr = film()->audio_frame_rate();
283 DCPTime const end = time + DCPTime::from_frames(audio->frames(), afr);
285 /* The audio we get might span a reel boundary, and if so we have to write it in bits */
290 if (_audio_reel == _reels.end ()) {
291 /* This audio is off the end of the last reel; ignore it */
295 if (end <= _audio_reel->period().to) {
296 /* Easy case: we can write all the audio to this reel */
297 _audio_reel->write (audio);
299 } else if (_audio_reel->period().to <= t) {
300 /* This reel is entirely before the start of our audio; just skip the reel */
303 /* This audio is over a reel boundary; split the audio into two and write the first part */
304 DCPTime part_lengths[2] = {
305 _audio_reel->period().to - t,
306 end - _audio_reel->period().to
309 /* Be careful that part_lengths[0] + part_lengths[1] can't be bigger than audio->frames() */
310 Frame part_frames[2] = {
311 part_lengths[0].frames_ceil(afr),
312 part_lengths[1].frames_floor(afr)
315 DCPOMATIC_ASSERT ((part_frames[0] + part_frames[1]) <= audio->frames());
317 if (part_frames[0]) {
318 shared_ptr<AudioBuffers> part (new AudioBuffers(audio, part_frames[0], 0));
319 _audio_reel->write (part);
322 if (part_frames[1]) {
323 audio.reset (new AudioBuffers(audio, part_frames[1], part_frames[0]));
329 t += part_lengths[0];
336 Writer::write (shared_ptr<const dcp::AtmosFrame> atmos, DCPTime time, AtmosMetadata metadata)
338 if (_atmos_reel->period().to == time) {
340 DCPOMATIC_ASSERT (_atmos_reel != _reels.end());
343 /* We assume that we get a video frame's worth of data here */
344 _atmos_reel->write (atmos, metadata);
348 /** Caller must hold a lock on _state_mutex */
350 Writer::have_sequenced_image_at_queue_head ()
352 if (_queue.empty ()) {
357 auto const & f = _queue.front();
358 return _last_written[f.reel].next(f);
363 Writer::LastWritten::next (QueueItem qi) const
365 if (qi.eyes == Eyes::BOTH) {
367 return qi.frame == (_frame + 1);
372 if (_eyes == Eyes::LEFT && qi.frame == _frame && qi.eyes == Eyes::RIGHT) {
376 if (_eyes == Eyes::RIGHT && qi.frame == (_frame + 1) && qi.eyes == Eyes::LEFT) {
385 Writer::LastWritten::update (QueueItem qi)
398 boost::mutex::scoped_lock lock (_state_mutex);
402 if (_finish || _queued_full_in_memory > _maximum_frames_in_memory || have_sequenced_image_at_queue_head ()) {
403 /* We've got something to do: go and do it */
407 /* Nothing to do: wait until something happens which may indicate that we do */
408 LOG_TIMING (N_("writer-sleep queue=%1"), _queue.size());
409 _empty_condition.wait (lock);
410 LOG_TIMING (N_("writer-wake queue=%1"), _queue.size());
413 /* We stop here if we have been asked to finish, and if either the queue
414 is empty or we do not have a sequenced image at its head (if this is the
415 case we will never terminate as no new frames will be sent once
418 if (_finish && (!have_sequenced_image_at_queue_head() || _queue.empty())) {
419 /* (Hopefully temporarily) log anything that was not written */
420 if (!_queue.empty() && !have_sequenced_image_at_queue_head()) {
421 LOG_WARNING (N_("Finishing writer with a left-over queue of %1:"), _queue.size());
422 for (auto const& i: _queue) {
423 if (i.type == QueueItem::Type::FULL) {
424 LOG_WARNING (N_("- type FULL, frame %1, eyes %2"), i.frame, (int) i.eyes);
426 LOG_WARNING (N_("- type FAKE, size %1, frame %2, eyes %3"), i.size, i.frame, (int) i.eyes);
433 /* Write any frames that we can write; i.e. those that are in sequence. */
434 while (have_sequenced_image_at_queue_head ()) {
435 auto qi = _queue.front ();
436 _last_written[qi.reel].update (qi);
438 if (qi.type == QueueItem::Type::FULL && qi.encoded) {
439 --_queued_full_in_memory;
444 auto& reel = _reels[qi.reel];
447 case QueueItem::Type::FULL:
448 LOG_DEBUG_ENCODE (N_("Writer FULL-writes %1 (%2)"), qi.frame, (int) qi.eyes);
450 qi.encoded.reset (new ArrayData(film()->j2c_path(qi.reel, qi.frame, qi.eyes, false)));
452 reel.write (qi.encoded, qi.frame, qi.eyes);
455 case QueueItem::Type::FAKE:
456 LOG_DEBUG_ENCODE (N_("Writer FAKE-writes %1"), qi.frame);
457 reel.fake_write (qi.size);
460 case QueueItem::Type::REPEAT:
461 LOG_DEBUG_ENCODE (N_("Writer REPEAT-writes %1"), qi.frame);
462 reel.repeat_write (qi.frame, qi.eyes);
468 _full_condition.notify_all ();
471 while (_queued_full_in_memory > _maximum_frames_in_memory) {
472 /* Too many frames in memory which can't yet be written to the stream.
473 Write some FULL frames to disk.
476 /* Find one from the back of the queue */
478 auto i = _queue.rbegin ();
479 while (i != _queue.rend() && (i->type != QueueItem::Type::FULL || !i->encoded)) {
483 DCPOMATIC_ASSERT (i != _queue.rend());
485 /* For the log message below */
486 int const awaiting = _last_written[_queue.front().reel].frame() + 1;
489 /* i is valid here, even though we don't hold a lock on the mutex,
490 since list iterators are unaffected by insertion and only this
491 thread could erase the last item in the list.
494 LOG_GENERAL ("Writer full; pushes %1 to disk while awaiting %2", i->frame, awaiting);
496 i->encoded->write_via_temp (
497 film()->j2c_path(i->reel, i->frame, i->eyes, true),
498 film()->j2c_path(i->reel, i->frame, i->eyes, false)
503 --_queued_full_in_memory;
504 _full_condition.notify_all ();
515 Writer::terminate_thread (bool can_throw)
517 boost::this_thread::disable_interruption dis;
519 boost::mutex::scoped_lock lock (_state_mutex);
522 _empty_condition.notify_all ();
523 _full_condition.notify_all ();
536 /** @param output_dcp Path to DCP folder to write */
538 Writer::finish (boost::filesystem::path output_dcp)
540 if (_thread.joinable()) {
541 LOG_GENERAL_NC ("Terminating writer thread");
542 terminate_thread (true);
545 LOG_GENERAL_NC ("Finishing ReelWriters");
547 for (auto& i: _reels) {
548 write_hanging_text (i);
549 i.finish (output_dcp);
552 LOG_GENERAL_NC ("Writing XML");
554 dcp::DCP dcp (output_dcp);
556 auto cpl = make_shared<dcp::CPL>(
558 film()->dcp_content_type()->libdcp_kind(),
559 film()->interop() ? dcp::Standard::INTEROP : dcp::Standard::SMPTE
564 /* Calculate digests for each reel in parallel */
566 auto job = _job.lock ();
568 job->sub (_("Computing digests"));
571 boost::asio::io_service service;
572 boost::thread_group pool;
574 auto work = make_shared<boost::asio::io_service::work>(service);
576 int const threads = max (1, Config::instance()->master_encoding_threads ());
578 for (int i = 0; i < threads; ++i) {
579 pool.create_thread (boost::bind (&boost::asio::io_service::run, &service));
582 boost::function<void (float)> set_progress;
584 set_progress = boost::bind (&Writer::set_digest_progress, this, job.get(), _1);
586 set_progress = &ignore_progress;
589 for (auto& i: _reels) {
590 service.post (boost::bind (&ReelWriter::calculate_digests, &i, set_progress));
592 service.post (boost::bind (&Writer::calculate_referenced_digests, this, set_progress));
600 for (auto& i: _reels) {
601 cpl->add (i.create_reel(_reel_assets, _fonts, output_dcp, _have_subtitles, _have_closed_captions));
606 auto creator = Config::instance()->dcp_creator();
607 if (creator.empty()) {
608 creator = String::compose("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
611 auto issuer = Config::instance()->dcp_issuer();
612 if (issuer.empty()) {
613 issuer = String::compose("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
616 cpl->set_ratings (film()->ratings());
618 vector<dcp::ContentVersion> cv;
619 for (auto i: film()->content_versions()) {
620 cv.push_back (dcp::ContentVersion(i));
622 cpl->set_content_versions (cv);
624 cpl->set_full_content_title_text (film()->name());
625 cpl->set_full_content_title_text_language (film()->name_language());
626 if (film()->release_territory()) {
627 cpl->set_release_territory (*film()->release_territory());
629 cpl->set_version_number (film()->version_number());
630 cpl->set_status (film()->status());
631 if (film()->chain()) {
632 cpl->set_chain (*film()->chain());
634 if (film()->distributor()) {
635 cpl->set_distributor (*film()->distributor());
637 if (film()->facility()) {
638 cpl->set_facility (*film()->facility());
640 if (film()->luminance()) {
641 cpl->set_luminance (*film()->luminance());
644 auto ac = film()->mapped_audio_channels();
645 dcp::MCASoundField field = (
646 find(ac.begin(), ac.end(), static_cast<int>(dcp::Channel::BSL)) != ac.end() ||
647 find(ac.begin(), ac.end(), static_cast<int>(dcp::Channel::BSR)) != ac.end()
648 ) ? dcp::MCASoundField::SEVEN_POINT_ONE : dcp::MCASoundField::FIVE_POINT_ONE;
650 dcp::MainSoundConfiguration msc (field, film()->audio_channels());
652 if (static_cast<int>(i) < film()->audio_channels()) {
653 msc.set_mapping (i, static_cast<dcp::Channel>(i));
657 cpl->set_main_sound_configuration (msc.to_string());
658 cpl->set_main_sound_sample_rate (film()->audio_frame_rate());
659 cpl->set_main_picture_stored_area (film()->frame_size());
661 auto active_area = film()->active_area();
662 if (active_area.width > 0 && active_area.height > 0) {
663 /* It's not allowed to have a zero active area width or height */
664 cpl->set_main_picture_active_area (active_area);
667 auto sl = film()->subtitle_languages().second;
669 cpl->set_additional_subtitle_languages(sl);
672 auto signer = Config::instance()->signer_chain();
673 /* We did check earlier, but check again here to be on the safe side */
675 if (!signer->valid (&reason)) {
676 throw InvalidSignerError (reason);
682 dcp::LocalTime().as_string(),
685 Config::instance()->dcp_metadata_filename_format()
689 N_("Wrote %1 FULL, %2 FAKE, %3 REPEAT, %4 pushed to disk"), _full_written, _fake_written, _repeat_written, _pushed_to_disk
692 write_cover_sheet (output_dcp);
697 Writer::write_cover_sheet (boost::filesystem::path output_dcp)
699 auto const cover = film()->file("COVER_SHEET.txt");
700 auto f = fopen_boost (cover, "w");
702 throw OpenFileError (cover, errno, OpenFileError::WRITE);
705 auto text = Config::instance()->cover_sheet ();
706 boost::algorithm::replace_all (text, "$CPL_NAME", film()->name());
707 boost::algorithm::replace_all (text, "$TYPE", film()->dcp_content_type()->pretty_name());
708 boost::algorithm::replace_all (text, "$CONTAINER", film()->container()->container_nickname());
710 auto audio_languages = film()->audio_languages();
711 if (!audio_languages.empty()) {
712 boost::algorithm::replace_all (text, "$AUDIO_LANGUAGE", audio_languages.front().description());
714 boost::algorithm::replace_all (text, "$AUDIO_LANGUAGE", _("None"));
717 auto subtitle_languages = film()->subtitle_languages();
718 if (subtitle_languages.first) {
719 boost::algorithm::replace_all (text, "$SUBTITLE_LANGUAGE", subtitle_languages.first->description());
721 boost::algorithm::replace_all (text, "$SUBTITLE_LANGUAGE", _("None"));
724 boost::uintmax_t size = 0;
726 auto i = boost::filesystem::recursive_directory_iterator(output_dcp);
727 i != boost::filesystem::recursive_directory_iterator();
729 if (boost::filesystem::is_regular_file (i->path())) {
730 size += boost::filesystem::file_size (i->path());
734 if (size > (1000000000L)) {
735 boost::algorithm::replace_all (text, "$SIZE", String::compose("%1GB", dcp::locale_convert<string>(size / 1000000000.0, 1, true)));
737 boost::algorithm::replace_all (text, "$SIZE", String::compose("%1MB", dcp::locale_convert<string>(size / 1000000.0, 1, true)));
740 auto ch = audio_channel_types (film()->mapped_audio_channels(), film()->audio_channels());
741 auto description = String::compose("%1.%2", ch.first, ch.second);
743 if (description == "0.0") {
744 description = _("None");
745 } else if (description == "1.0") {
746 description = _("Mono");
747 } else if (description == "2.0") {
748 description = _("Stereo");
750 boost::algorithm::replace_all (text, "$AUDIO", description);
752 auto const hmsf = film()->length().split(film()->video_frame_rate());
754 if (hmsf.h == 0 && hmsf.m == 0) {
755 length = String::compose("%1s", hmsf.s);
756 } else if (hmsf.h == 0 && hmsf.m > 0) {
757 length = String::compose("%1m%2s", hmsf.m, hmsf.s);
758 } else if (hmsf.h > 0 && hmsf.m > 0) {
759 length = String::compose("%1h%2m%3s", hmsf.h, hmsf.m, hmsf.s);
762 boost::algorithm::replace_all (text, "$LENGTH", length);
764 checked_fwrite (text.c_str(), text.length(), f, cover);
769 /** @param frame Frame index within the whole DCP.
770 * @return true if we can fake-write this frame.
773 Writer::can_fake_write (Frame frame) const
775 if (film()->encrypted()) {
776 /* We need to re-write the frame because the asset ID is embedded in the HMAC... I think... */
780 /* We have to do a proper write of the first frame so that we can set up the JPEG2000
781 parameters in the asset writer.
784 auto const & reel = _reels[video_reel(frame)];
786 /* Make frame relative to the start of the reel */
787 frame -= reel.start ();
788 return (frame != 0 && frame < reel.first_nonexistant_frame());
792 /** @param track Closed caption track if type == TextType::CLOSED_CAPTION */
794 Writer::write (PlayerText text, TextType type, optional<DCPTextTrack> track, DCPTimePeriod period)
796 vector<ReelWriter>::iterator* reel = nullptr;
799 case TextType::OPEN_SUBTITLE:
800 reel = &_subtitle_reel;
801 _have_subtitles = true;
803 case TextType::CLOSED_CAPTION:
804 DCPOMATIC_ASSERT (track);
805 DCPOMATIC_ASSERT (_caption_reels.find(*track) != _caption_reels.end());
806 reel = &_caption_reels[*track];
807 _have_closed_captions.insert (*track);
810 DCPOMATIC_ASSERT (false);
813 DCPOMATIC_ASSERT (*reel != _reels.end());
814 while ((*reel)->period().to <= period.from) {
816 DCPOMATIC_ASSERT (*reel != _reels.end());
817 write_hanging_text (**reel);
820 auto back_off = [this](DCPTimePeriod period) {
821 period.to -= DCPTime::from_frames(2, film()->video_frame_rate());
825 if (period.to > (*reel)->period().to) {
826 /* This text goes off the end of the reel. Store parts of it that should go into
829 for (auto i = std::next(*reel); i != _reels.end(); ++i) {
830 auto overlap = i->period().overlap(period);
832 _hanging_texts.push_back (HangingText{text, type, track, back_off(*overlap)});
835 /* Back off from the reel boundary by a couple of frames to avoid tripping checks
836 * for subtitles being too close together.
838 period.to = (*reel)->period().to;
839 period = back_off(period);
842 (*reel)->write (text, type, track, period);
847 Writer::write (vector<FontData> fonts)
849 /* Just keep a list of unique fonts and we'll deal with them in ::finish */
851 for (auto const& i: fonts) {
853 for (auto& j: _fonts) {
860 _fonts.push_back (i);
867 operator< (QueueItem const & a, QueueItem const & b)
869 if (a.reel != b.reel) {
870 return a.reel < b.reel;
873 if (a.frame != b.frame) {
874 return a.frame < b.frame;
877 return static_cast<int> (a.eyes) < static_cast<int> (b.eyes);
882 operator== (QueueItem const & a, QueueItem const & b)
884 return a.reel == b.reel && a.frame == b.frame && a.eyes == b.eyes;
889 Writer::set_encoder_threads (int threads)
891 boost::mutex::scoped_lock lm (_state_mutex);
892 _maximum_frames_in_memory = lrint (threads * Config::instance()->frames_in_memory_multiplier());
893 _maximum_queue_size = threads * 16;
898 Writer::write (ReferencedReelAsset asset)
900 _reel_assets.push_back (asset);
905 Writer::video_reel (int frame) const
907 auto t = DCPTime::from_frames (frame, film()->video_frame_rate());
909 while (i < _reels.size() && !_reels[i].period().contains (t)) {
913 DCPOMATIC_ASSERT (i < _reels.size ());
919 Writer::set_digest_progress (Job* job, float progress)
921 boost::mutex::scoped_lock lm (_digest_progresses_mutex);
923 _digest_progresses[boost::this_thread::get_id()] = progress;
924 float min_progress = FLT_MAX;
925 for (auto const& i: _digest_progresses) {
926 min_progress = min (min_progress, i.second);
929 job->set_progress (min_progress);
936 /** Calculate hashes for any referenced MXF assets which do not already have one */
938 Writer::calculate_referenced_digests (boost::function<void (float)> set_progress)
940 for (auto const& i: _reel_assets) {
941 auto file = dynamic_pointer_cast<dcp::ReelFileAsset>(i.asset);
942 if (file && !file->hash()) {
943 file->asset_ref().asset()->hash (set_progress);
944 file->set_hash (file->asset_ref().asset()->hash());
951 Writer::write_hanging_text (ReelWriter& reel)
953 vector<HangingText> new_hanging_texts;
954 for (auto i: _hanging_texts) {
955 if (i.period.from == reel.period().from) {
956 reel.write (i.text, i.type, i.track, i.period);
958 new_hanging_texts.push_back (i);
961 _hanging_texts = new_hanging_texts;