2 Copyright (C) 2013-2021 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/>.
22 #include "atmos_decoder.h"
23 #include "audio_buffers.h"
24 #include "audio_content.h"
25 #include "audio_decoder.h"
26 #include "audio_processor.h"
27 #include "compose.hpp"
29 #include "content_audio.h"
30 #include "content_video.h"
31 #include "dcp_content.h"
32 #include "dcp_decoder.h"
33 #include "dcpomatic_log.h"
35 #include "decoder_factory.h"
36 #include "ffmpeg_content.h"
38 #include "frame_rate_change.h"
40 #include "image_decoder.h"
43 #include "maths_util.h"
46 #include "player_video.h"
49 #include "raw_image_proxy.h"
50 #include "referenced_reel_asset.h"
51 #include "render_text.h"
53 #include "text_content.h"
54 #include "text_decoder.h"
56 #include "video_decoder.h"
58 #include <dcp/reel_closed_caption_asset.h>
59 #include <dcp/reel_picture_asset.h>
60 #include <dcp/reel_sound_asset.h>
61 #include <dcp/reel_subtitle_asset.h>
71 using std::dynamic_pointer_cast;
74 using std::make_shared;
75 using std::make_shared;
80 using std::shared_ptr;
83 using boost::optional;
84 using boost::scoped_ptr;
85 #if BOOST_VERSION >= 106100
86 using namespace boost::placeholders;
88 using namespace dcpomatic;
91 int const PlayerProperty::VIDEO_CONTAINER_SIZE = 700;
92 int const PlayerProperty::PLAYLIST = 701;
93 int const PlayerProperty::FILM_CONTAINER = 702;
94 int const PlayerProperty::FILM_VIDEO_FRAME_RATE = 703;
95 int const PlayerProperty::DCP_DECODE_REDUCTION = 704;
96 int const PlayerProperty::PLAYBACK_LENGTH = 705;
99 Player::Player (shared_ptr<const Film> film, Image::Alignment subtitle_alignment)
102 , _tolerant (film->tolerant())
103 , _audio_merger (_film->audio_frame_rate())
104 , _subtitle_alignment (subtitle_alignment)
110 Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist_)
112 , _playlist (playlist_)
114 , _tolerant (film->tolerant())
115 , _audio_merger (_film->audio_frame_rate())
124 _film_changed_connection = _film->Change.connect (bind (&Player::film_change, this, _1, _2));
125 /* The butler must hear about this first, so since we are proxying this through to the butler we must
128 _playlist_change_connection = playlist()->Change.connect (bind (&Player::playlist_change, this, _1), boost::signals2::at_front);
129 _playlist_content_change_connection = playlist()->ContentChange.connect (bind(&Player::playlist_content_change, this, _1, _3, _4));
130 set_video_container_size (_film->frame_size ());
132 film_change (ChangeType::DONE, Film::Property::AUDIO_PROCESSOR);
135 seek (DCPTime (), true);
140 Player::setup_pieces ()
142 boost::mutex::scoped_lock lm (_mutex);
143 setup_pieces_unlocked ();
148 Player::setup_pieces_unlocked ()
150 _playback_length = _playlist ? _playlist->length(_film) : _film->length();
152 auto old_pieces = _pieces;
155 auto playlist_content = playlist()->content();
156 bool const have_threed = std::any_of(
157 playlist_content.begin(),
158 playlist_content.end(),
159 [](shared_ptr<const Content> c) {
160 return c->video && (c->video->frame_type() == VideoFrameType::THREE_D_LEFT || c->video->frame_type() == VideoFrameType::THREE_D_RIGHT);
165 _shuffler.reset(new Shuffler());
166 _shuffler->Video.connect(bind(&Player::video, this, _1, _2));
169 for (auto i: playlist()->content()) {
171 if (!i->paths_valid ()) {
175 if (_ignore_video && _ignore_audio && i->text.empty()) {
176 /* We're only interested in text and this content has none */
180 shared_ptr<Decoder> old_decoder;
181 for (auto j: old_pieces) {
182 if (j->content == i) {
183 old_decoder = j->decoder;
188 auto decoder = decoder_factory (_film, i, _fast, _tolerant, old_decoder);
189 DCPOMATIC_ASSERT (decoder);
191 FrameRateChange frc (_film, i);
193 if (decoder->video && _ignore_video) {
194 decoder->video->set_ignore (true);
197 if (decoder->audio && _ignore_audio) {
198 decoder->audio->set_ignore (true);
202 for (auto i: decoder->text) {
203 i->set_ignore (true);
207 auto dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
209 dcp->set_decode_referenced (_play_referenced);
210 if (_play_referenced) {
211 dcp->set_forced_reduction (_dcp_decode_reduction);
215 auto piece = make_shared<Piece>(i, decoder, frc);
216 _pieces.push_back (piece);
218 if (decoder->video) {
220 /* We need a Shuffler to cope with 3D L/R video data arriving out of sequence */
221 decoder->video->Data.connect (bind(&Shuffler::video, _shuffler.get(), weak_ptr<Piece>(piece), _1));
223 decoder->video->Data.connect (bind(&Player::video, this, weak_ptr<Piece>(piece), _1));
227 if (decoder->audio) {
228 decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
231 auto j = decoder->text.begin();
233 while (j != decoder->text.end()) {
234 (*j)->BitmapStart.connect (
235 bind(&Player::bitmap_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
237 (*j)->PlainStart.connect (
238 bind(&Player::plain_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
241 bind(&Player::subtitle_stop, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
247 if (decoder->atmos) {
248 decoder->atmos->Data.connect (bind(&Player::atmos, this, weak_ptr<Piece>(piece), _1));
252 _stream_states.clear ();
253 for (auto i: _pieces) {
254 if (i->content->audio) {
255 for (auto j: i->content->audio->streams()) {
256 _stream_states[j] = StreamState (i, i->content->position ());
261 auto ignore_overlap = [](shared_ptr<VideoContent> v) {
262 return v && v->use() && v->frame_type() != VideoFrameType::THREE_D_LEFT && v->frame_type() != VideoFrameType::THREE_D_RIGHT;
265 for (auto i = _pieces.begin(); i != _pieces.end(); ++i) {
266 if (ignore_overlap((*i)->content->video)) {
267 /* Look for content later in the content list with in-use video that overlaps this */
268 auto const period = DCPTimePeriod((*i)->content->position(), (*i)->content->end(_film));
269 for (auto j = std::next(i); j != _pieces.end(); ++j) {
270 if ((*j)->content->video && ignore_overlap((*j)->content->video)) {
271 (*i)->ignore_video = DCPTimePeriod((*j)->content->position(), (*j)->content->end(_film)).overlap(period);
277 _black = EmptyVideo (_film, playlist(), _playback_length);
278 _silent = EmptyAudio (_film, playlist(), _playback_length);
280 _next_video_time = boost::none;
281 _next_video_eyes = Eyes::BOTH;
282 _next_audio_time = boost::none;
287 Player::playlist_content_change (ChangeType type, int property, bool frequent)
289 if (property == VideoContentProperty::CROP) {
290 if (type == ChangeType::DONE) {
291 auto const vcs = video_container_size();
292 boost::mutex::scoped_lock lm (_mutex);
293 for (auto const& i: _delay) {
294 i.first->reset_metadata (_film, vcs);
298 if (type == ChangeType::PENDING) {
299 /* The player content is probably about to change, so we can't carry on
300 until that has happened and we've rebuilt our pieces. Stop pass()
301 and seek() from working until then.
304 } else if (type == ChangeType::DONE) {
305 /* A change in our content has gone through. Re-build our pieces. */
308 } else if (type == ChangeType::CANCELLED) {
313 Change (type, property, frequent);
318 Player::set_video_container_size (dcp::Size s)
320 Change (ChangeType::PENDING, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
323 boost::mutex::scoped_lock lm (_mutex);
325 if (s == _video_container_size) {
327 Change (ChangeType::CANCELLED, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
331 _video_container_size = s;
333 _black_image = make_shared<Image>(AV_PIX_FMT_RGB24, _video_container_size, Image::Alignment::PADDED);
334 _black_image->make_black ();
337 Change (ChangeType::DONE, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
342 Player::playlist_change (ChangeType type)
344 if (type == ChangeType::DONE) {
347 Change (type, PlayerProperty::PLAYLIST, false);
352 Player::film_change (ChangeType type, Film::Property p)
354 /* Here we should notice Film properties that affect our output, and
355 alert listeners that our output now would be different to how it was
356 last time we were run.
359 if (p == Film::Property::CONTAINER) {
360 Change (type, PlayerProperty::FILM_CONTAINER, false);
361 } else if (p == Film::Property::VIDEO_FRAME_RATE) {
362 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
363 so we need new pieces here.
365 if (type == ChangeType::DONE) {
368 Change (type, PlayerProperty::FILM_VIDEO_FRAME_RATE, false);
369 } else if (p == Film::Property::AUDIO_PROCESSOR) {
370 if (type == ChangeType::DONE && _film->audio_processor ()) {
371 boost::mutex::scoped_lock lm (_mutex);
372 _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
374 } else if (p == Film::Property::AUDIO_CHANNELS) {
375 if (type == ChangeType::DONE) {
376 boost::mutex::scoped_lock lm (_mutex);
377 _audio_merger.clear ();
383 shared_ptr<PlayerVideo>
384 Player::black_player_video_frame (Eyes eyes) const
386 return std::make_shared<PlayerVideo> (
387 std::make_shared<const RawImageProxy>(_black_image),
390 _video_container_size,
391 _video_container_size,
394 PresetColourConversion::all().front().conversion,
396 std::weak_ptr<Content>(),
397 boost::optional<Frame>(),
404 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
406 auto s = t - piece->content->position ();
407 s = min (piece->content->length_after_trim(_film), s);
408 s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
410 /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
411 then convert that ContentTime to frames at the content's rate. However this fails for
412 situations like content at 29.9978733fps, DCP at 30fps. The accuracy of the Time type is not
413 enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
415 Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
417 return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
422 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
424 /* See comment in dcp_to_content_video */
425 auto const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime(piece->content->trim_start(), piece->frc);
426 return d + piece->content->position();
431 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
433 auto s = t - piece->content->position ();
434 s = min (piece->content->length_after_trim(_film), s);
435 /* See notes in dcp_to_content_video */
436 return max (DCPTime(), DCPTime(piece->content->trim_start(), piece->frc) + s).frames_floor(_film->audio_frame_rate());
441 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
443 /* See comment in dcp_to_content_video */
444 return DCPTime::from_frames (f, _film->audio_frame_rate())
445 - DCPTime (piece->content->trim_start(), piece->frc)
446 + piece->content->position();
451 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
453 auto s = t - piece->content->position ();
454 s = min (piece->content->length_after_trim(_film), s);
455 return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
460 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
462 return max (DCPTime(), DCPTime(t - piece->content->trim_start(), piece->frc) + piece->content->position());
467 Player::get_subtitle_fonts ()
469 boost::mutex::scoped_lock lm (_mutex);
471 vector<FontData> fonts;
472 for (auto i: _pieces) {
473 /* XXX: things may go wrong if there are duplicate font IDs
474 with different font files.
476 auto f = i->decoder->fonts ();
477 copy (f.begin(), f.end(), back_inserter(fonts));
484 /** Set this player never to produce any video data */
486 Player::set_ignore_video ()
488 boost::mutex::scoped_lock lm (_mutex);
489 _ignore_video = true;
490 setup_pieces_unlocked ();
495 Player::set_ignore_audio ()
497 boost::mutex::scoped_lock lm (_mutex);
498 _ignore_audio = true;
499 setup_pieces_unlocked ();
504 Player::set_ignore_text ()
506 boost::mutex::scoped_lock lm (_mutex);
508 setup_pieces_unlocked ();
512 /** Set the player to always burn open texts into the image regardless of the content settings */
514 Player::set_always_burn_open_subtitles ()
516 boost::mutex::scoped_lock lm (_mutex);
517 _always_burn_open_subtitles = true;
521 /** Sets up the player to be faster, possibly at the expense of quality */
525 boost::mutex::scoped_lock lm (_mutex);
527 setup_pieces_unlocked ();
532 Player::set_play_referenced ()
534 boost::mutex::scoped_lock lm (_mutex);
535 _play_referenced = true;
536 setup_pieces_unlocked ();
541 maybe_add_asset (list<ReferencedReelAsset>& a, shared_ptr<dcp::ReelAsset> r, Frame reel_trim_start, Frame reel_trim_end, DCPTime from, int const ffr)
543 DCPOMATIC_ASSERT (r);
544 r->set_entry_point (r->entry_point().get_value_or(0) + reel_trim_start);
545 r->set_duration (r->actual_duration() - reel_trim_start - reel_trim_end);
546 if (r->actual_duration() > 0) {
548 ReferencedReelAsset(r, DCPTimePeriod(from, from + DCPTime::from_frames(r->actual_duration(), ffr)))
554 list<ReferencedReelAsset>
555 Player::get_reel_assets ()
557 /* Does not require a lock on _mutex as it's only called from DCPEncoder */
559 list<ReferencedReelAsset> reel_assets;
561 for (auto content: playlist()->content()) {
562 auto dcp = dynamic_pointer_cast<DCPContent>(content);
567 if (!dcp->reference_video() && !dcp->reference_audio() && !dcp->reference_text(TextType::OPEN_SUBTITLE) && !dcp->reference_text(TextType::CLOSED_CAPTION)) {
571 scoped_ptr<DCPDecoder> decoder;
573 decoder.reset (new DCPDecoder(_film, dcp, false, false, shared_ptr<DCPDecoder>()));
578 auto const frame_rate = _film->video_frame_rate();
579 DCPOMATIC_ASSERT (dcp->video_frame_rate());
580 /* We should only be referencing if the DCP rate is the same as the film rate */
581 DCPOMATIC_ASSERT (std::round(dcp->video_frame_rate().get()) == frame_rate);
583 Frame const trim_start = dcp->trim_start().frames_round(frame_rate);
584 Frame const trim_end = dcp->trim_end().frames_round(frame_rate);
586 /* position in the asset from the start */
587 int64_t offset_from_start = 0;
588 /* position i the asset from the end */
589 int64_t offset_from_end = 0;
590 for (auto reel: decoder->reels()) {
591 /* Assume that main picture duration is the length of the reel */
592 offset_from_end += reel->main_picture()->actual_duration();
595 for (auto reel: decoder->reels()) {
597 /* Assume that main picture duration is the length of the reel */
598 int64_t const reel_duration = reel->main_picture()->actual_duration();
600 /* See doc/design/trim_reels.svg */
601 Frame const reel_trim_start = min(reel_duration, max(int64_t(0), trim_start - offset_from_start));
602 Frame const reel_trim_end = min(reel_duration, max(int64_t(0), reel_duration - (offset_from_end - trim_end)));
604 auto const from = max(DCPTime(), content->position() + DCPTime::from_frames(offset_from_start, frame_rate) - DCPTime::from_frames(trim_start, frame_rate));
605 if (dcp->reference_video()) {
606 maybe_add_asset (reel_assets, reel->main_picture(), reel_trim_start, reel_trim_end, from, frame_rate);
609 if (dcp->reference_audio()) {
610 maybe_add_asset (reel_assets, reel->main_sound(), reel_trim_start, reel_trim_end, from, frame_rate);
613 if (dcp->reference_text(TextType::OPEN_SUBTITLE)) {
614 maybe_add_asset (reel_assets, reel->main_subtitle(), reel_trim_start, reel_trim_end, from, frame_rate);
617 if (dcp->reference_text(TextType::CLOSED_CAPTION)) {
618 for (auto caption: reel->closed_captions()) {
619 maybe_add_asset (reel_assets, caption, reel_trim_start, reel_trim_end, from, frame_rate);
623 offset_from_start += reel_duration;
624 offset_from_end -= reel_duration;
635 boost::mutex::scoped_lock lm (_mutex);
638 /* We can't pass in this state */
639 LOG_DEBUG_PLAYER_NC ("Player is suspended");
643 if (_playback_length == DCPTime()) {
644 /* Special; just give one black frame */
645 emit_video (black_player_video_frame(Eyes::BOTH), DCPTime());
649 /* Find the decoder or empty which is farthest behind where we are and make it emit some data */
651 shared_ptr<Piece> earliest_content;
652 optional<DCPTime> earliest_time;
654 for (auto i: _pieces) {
659 auto const t = content_time_to_dcp (i, max(i->decoder->position(), i->content->trim_start()));
660 if (t > i->content->end(_film)) {
664 /* Given two choices at the same time, pick the one with texts so we see it before
667 if (!earliest_time || t < *earliest_time || (t == *earliest_time && !i->decoder->text.empty())) {
669 earliest_content = i;
683 if (earliest_content) {
687 if (!_black.done() && !_ignore_video && (!earliest_time || _black.position() < *earliest_time)) {
688 earliest_time = _black.position ();
692 if (!_silent.done() && !_ignore_audio && (!earliest_time || _silent.position() < *earliest_time)) {
693 earliest_time = _silent.position ();
700 LOG_DEBUG_PLAYER ("Calling pass() on %1", earliest_content->content->path(0));
701 earliest_content->done = earliest_content->decoder->pass ();
702 auto dcp = dynamic_pointer_cast<DCPContent>(earliest_content->content);
703 if (dcp && !_play_referenced && dcp->reference_audio()) {
704 /* We are skipping some referenced DCP audio content, so we need to update _next_audio_time
705 to `hide' the fact that no audio was emitted during the referenced DCP (though
706 we need to behave as though it was).
708 _next_audio_time = dcp->end (_film);
714 LOG_DEBUG_PLAYER ("Emit black for gap at %1", to_string(_black.position()));
715 auto period = _black.period_at_position();
716 emit_video (black_player_video_frame(period.second), _black.position());
717 _black.set_position (_black.position() + one_video_frame());
722 LOG_DEBUG_PLAYER ("Emit silence for gap at %1", to_string(_silent.position()));
723 DCPTimePeriod period (_silent.period_at_position());
724 if (_next_audio_time) {
725 /* Sometimes the thing that happened last finishes fractionally before
726 or after this silence. Bodge the start time of the silence to fix it.
727 I think this is nothing to worry about since we will just add or
728 remove a little silence at the end of some content.
730 int64_t const error = labs(period.from.get() - _next_audio_time->get());
731 /* Let's not worry about less than a frame at 24fps */
732 int64_t const too_much_error = DCPTime::from_frames(1, 24).get();
733 if (error >= too_much_error) {
734 _film->log()->log(String::compose("Silence starting before or after last audio by %1", error), LogEntry::TYPE_ERROR);
736 DCPOMATIC_ASSERT (error < too_much_error);
737 period.from = *_next_audio_time;
739 if (period.duration() > one_video_frame()) {
740 period.to = period.from + one_video_frame();
743 _silent.set_position (period.to);
751 /* Emit any audio that is ready */
753 /* Work out the time before which the audio is definitely all here. This is the earliest last_push_end of one
754 of our streams, or the position of the _silent. First, though we choose only streams that are less than
755 ignore_streams_behind seconds behind the furthest ahead (we assume that if a stream has fallen that far
756 behind it has finished). This is so that we don't withhold audio indefinitely awaiting data from a stream
757 that will never come, causing bugs like #2101.
759 constexpr int ignore_streams_behind = 5;
761 using state_pair = std::pair<AudioStreamPtr, StreamState>;
763 /* Find the 'leading' stream (i.e. the one that pushed data most recently) */
764 auto latest_last_push_end = std::max_element(
765 _stream_states.begin(),
766 _stream_states.end(),
767 [](state_pair const& a, state_pair const& b) { return a.second.last_push_end < b.second.last_push_end; }
770 if (latest_last_push_end != _stream_states.end()) {
771 LOG_DEBUG_PLAYER("Leading stream is in %1 at %2", latest_last_push_end->second.piece->content->path(0), to_string(latest_last_push_end->second.last_push_end));
774 /* Now make a list of those streams that are less than ignore_streams_behind behind the leader */
775 std::map<AudioStreamPtr, StreamState> alive_stream_states;
776 for (auto const& i: _stream_states) {
777 if ((latest_last_push_end->second.last_push_end - i.second.last_push_end) < dcpomatic::DCPTime::from_seconds(ignore_streams_behind)) {
778 alive_stream_states.insert(i);
780 LOG_DEBUG_PLAYER("Ignoring stream %1 because it is too far behind", i.second.piece->content->path(0));
784 auto pull_to = _playback_length;
785 for (auto const& i: alive_stream_states) {
786 if (!i.second.piece->done && i.second.last_push_end < pull_to) {
787 pull_to = i.second.last_push_end;
790 if (!_silent.done() && _silent.position() < pull_to) {
791 pull_to = _silent.position();
794 LOG_DEBUG_PLAYER("Emitting audio up to %1", to_string(pull_to));
795 auto audio = _audio_merger.pull (pull_to);
796 for (auto i = audio.begin(); i != audio.end(); ++i) {
797 if (_next_audio_time && i->second < *_next_audio_time) {
798 /* This new data comes before the last we emitted (or the last seek); discard it */
799 auto cut = discard_audio (i->first, i->second, *_next_audio_time);
804 } else if (_next_audio_time && i->second > *_next_audio_time) {
805 /* There's a gap between this data and the last we emitted; fill with silence */
806 fill_audio (DCPTimePeriod (*_next_audio_time, i->second));
809 emit_audio (i->first, i->second);
816 for (auto const& i: _delay) {
817 do_emit_video(i.first, i.second);
825 /** @return Open subtitles for the frame at the given time, converted to images */
826 optional<PositionImage>
827 Player::open_subtitles_for_frame (DCPTime time) const
829 list<PositionImage> captions;
830 int const vfr = _film->video_frame_rate();
834 _active_texts[static_cast<int>(TextType::OPEN_SUBTITLE)].get_burnt(DCPTimePeriod(time, time + DCPTime::from_frames(1, vfr)), _always_burn_open_subtitles)
837 /* Bitmap subtitles */
838 for (auto i: j.bitmap) {
843 /* i.image will already have been scaled to fit _video_container_size */
844 dcp::Size scaled_size (i.rectangle.width * _video_container_size.width, i.rectangle.height * _video_container_size.height);
850 lrint(_video_container_size.width * i.rectangle.x),
851 lrint(_video_container_size.height * i.rectangle.y)
857 /* String subtitles (rendered to an image) */
858 if (!j.string.empty()) {
859 auto s = render_text (j.string, j.fonts, _video_container_size, time, vfr);
860 copy (s.begin(), s.end(), back_inserter (captions));
864 if (captions.empty()) {
868 return merge (captions, _subtitle_alignment);
873 Player::video (weak_ptr<Piece> weak_piece, ContentVideo video)
879 auto piece = weak_piece.lock ();
884 if (!piece->content->video->use()) {
888 FrameRateChange frc (_film, piece->content);
889 if (frc.skip && (video.frame % 2) == 1) {
893 /* Time of the first frame we will emit */
894 DCPTime const time = content_video_to_dcp (piece, video.frame);
895 if (video.eyes == Eyes::BOTH) {
896 LOG_DEBUG_PLAYER("Received video frame %1 at %2", video.frame, to_string(time));
898 LOG_DEBUG_PLAYER("Received video frame %1 %2 at %3", (video.eyes == Eyes::LEFT ? "L" : "R"), video.frame, to_string(time));
901 /* Discard if it's before the content's period or the last accurate seek. We can't discard
902 if it's after the content's period here as in that case we still need to fill any gap between
903 `now' and the end of the content's period.
905 if (time < piece->content->position() || (_next_video_time && time < *_next_video_time)) {
909 if (piece->ignore_video && piece->ignore_video->contains(time)) {
913 /* Fill gaps that we discover now that we have some video which needs to be emitted.
914 This is where we need to fill to.
916 DCPTime fill_to = min (time, piece->content->end(_film));
918 if (_next_video_time) {
919 DCPTime fill_from = max (*_next_video_time, piece->content->position());
921 /* Fill if we have more than half a frame to do */
922 if ((fill_to - fill_from) > one_video_frame() / 2) {
923 auto last = _last_video.find (weak_piece);
924 if (_film->three_d()) {
925 auto fill_to_eyes = video.eyes;
926 if (fill_to_eyes == Eyes::BOTH) {
927 fill_to_eyes = Eyes::LEFT;
929 if (fill_to == piece->content->end(_film)) {
930 /* Don't fill after the end of the content */
931 fill_to_eyes = Eyes::LEFT;
934 auto eyes = _next_video_eyes.get_value_or(Eyes::LEFT);
935 if (eyes == Eyes::BOTH) {
938 while (j < fill_to || eyes != fill_to_eyes) {
939 if (last != _last_video.end()) {
940 LOG_DEBUG_PLAYER("Fill using last video at %1 in 3D mode", to_string(j));
941 auto copy = last->second->shallow_copy();
942 copy->set_eyes (eyes);
943 emit_video (copy, j);
945 LOG_DEBUG_PLAYER("Fill using black at %1 in 3D mode", to_string(j));
946 emit_video (black_player_video_frame(eyes), j);
948 if (eyes == Eyes::RIGHT) {
949 j += one_video_frame();
951 eyes = increment_eyes (eyes);
954 for (DCPTime j = fill_from; j < fill_to; j += one_video_frame()) {
955 if (last != _last_video.end()) {
956 emit_video (last->second, j);
958 emit_video (black_player_video_frame(Eyes::BOTH), j);
965 auto const content_video = piece->content->video;
967 _last_video[weak_piece] = std::make_shared<PlayerVideo>(
969 content_video->actual_crop(),
970 content_video->fade (_film, video.frame),
972 content_video->scaled_size(_film->frame_size()),
973 _video_container_size,
975 content_video->pixel_quanta()
977 _video_container_size,
980 content_video->colour_conversion(),
981 content_video->range(),
988 for (int i = 0; i < frc.repeat; ++i) {
989 if (t < piece->content->end(_film)) {
990 emit_video (_last_video[weak_piece], t);
992 t += one_video_frame ();
998 Player::audio (weak_ptr<Piece> weak_piece, AudioStreamPtr stream, ContentAudio content_audio)
1004 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1006 auto piece = weak_piece.lock ();
1011 auto content = piece->content->audio;
1012 DCPOMATIC_ASSERT (content);
1014 int const rfr = content->resampled_frame_rate (_film);
1016 /* Compute time in the DCP */
1017 auto time = resampled_audio_to_dcp (piece, content_audio.frame);
1018 LOG_DEBUG_PLAYER("Received audio frame %1 at %2", content_audio.frame, to_string(time));
1020 /* And the end of this block in the DCP */
1021 auto end = time + DCPTime::from_frames(content_audio.audio->frames(), rfr);
1023 /* Remove anything that comes before the start or after the end of the content */
1024 if (time < piece->content->position()) {
1025 auto cut = discard_audio (content_audio.audio, time, piece->content->position());
1027 /* This audio is entirely discarded */
1030 content_audio.audio = cut.first;
1032 } else if (time > piece->content->end(_film)) {
1033 /* Discard it all */
1035 } else if (end > piece->content->end(_film)) {
1036 Frame const remaining_frames = DCPTime(piece->content->end(_film) - time).frames_round(rfr);
1037 if (remaining_frames == 0) {
1040 content_audio.audio = make_shared<AudioBuffers>(content_audio.audio, remaining_frames, 0);
1043 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1047 auto const fade_coeffs = content->fade (stream, content_audio.frame, content_audio.audio->frames(), rfr);
1048 if (content->gain() != 0 || !fade_coeffs.empty()) {
1049 auto gain_buffers = make_shared<AudioBuffers>(content_audio.audio);
1050 if (!fade_coeffs.empty()) {
1051 /* Apply both fade and gain */
1052 DCPOMATIC_ASSERT (fade_coeffs.size() == static_cast<size_t>(gain_buffers->frames()));
1053 auto const channels = gain_buffers->channels();
1054 auto const frames = fade_coeffs.size();
1055 auto data = gain_buffers->data();
1056 auto const gain = db_to_linear (content->gain());
1057 for (auto channel = 0; channel < channels; ++channel) {
1058 for (auto frame = 0U; frame < frames; ++frame) {
1059 data[channel][frame] *= gain * fade_coeffs[frame];
1063 /* Just apply gain */
1064 gain_buffers->apply_gain (content->gain());
1066 content_audio.audio = gain_buffers;
1071 content_audio.audio = remap (content_audio.audio, _film->audio_channels(), stream->mapping());
1075 if (_audio_processor) {
1076 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
1081 _audio_merger.push (content_audio.audio, time);
1082 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
1083 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
1088 Player::bitmap_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentBitmapText subtitle)
1094 auto piece = weak_piece.lock ();
1095 auto content = weak_content.lock ();
1096 if (!piece || !content) {
1101 for (auto& sub: subtitle.subs)
1103 /* Apply content's subtitle offsets */
1104 sub.rectangle.x += content->x_offset ();
1105 sub.rectangle.y += content->y_offset ();
1107 /* Apply a corrective translation to keep the subtitle centred after the scale that is coming up */
1108 sub.rectangle.x -= sub.rectangle.width * ((content->x_scale() - 1) / 2);
1109 sub.rectangle.y -= sub.rectangle.height * ((content->y_scale() - 1) / 2);
1111 /* Apply content's subtitle scale */
1112 sub.rectangle.width *= content->x_scale ();
1113 sub.rectangle.height *= content->y_scale ();
1115 auto image = sub.image;
1117 /* We will scale the subtitle up to fit _video_container_size */
1118 int const width = sub.rectangle.width * _video_container_size.width;
1119 int const height = sub.rectangle.height * _video_container_size.height;
1120 if (width == 0 || height == 0) {
1124 dcp::Size scaled_size (width, height);
1125 ps.bitmap.push_back (BitmapText(image->scale(scaled_size, dcp::YUVToRGB::REC601, image->pixel_format(), Image::Alignment::PADDED, _fast), sub.rectangle));
1128 DCPTime from(content_time_to_dcp(piece, subtitle.from()));
1129 _active_texts[static_cast<int>(content->type())].add_from(weak_content, ps, from);
1134 Player::plain_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentStringText subtitle)
1140 auto piece = weak_piece.lock ();
1141 auto content = weak_content.lock ();
1142 if (!piece || !content) {
1147 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
1149 if (from > piece->content->end(_film)) {
1153 for (auto s: subtitle.subs) {
1154 s.set_h_position (s.h_position() + content->x_offset());
1155 s.set_v_position (s.v_position() + content->y_offset());
1156 float const xs = content->x_scale();
1157 float const ys = content->y_scale();
1158 float size = s.size();
1160 /* Adjust size to express the common part of the scaling;
1161 e.g. if xs = ys = 0.5 we scale size by 2.
1163 if (xs > 1e-5 && ys > 1e-5) {
1164 size *= 1 / min (1 / xs, 1 / ys);
1168 /* Then express aspect ratio changes */
1169 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
1170 s.set_aspect_adjust (xs / ys);
1173 s.set_in (dcp::Time(from.seconds(), 1000));
1174 ps.string.push_back (StringText (s, content->outline_width()));
1175 ps.add_fonts (content->fonts ());
1178 _active_texts[static_cast<int>(content->type())].add_from(weak_content, ps, from);
1183 Player::subtitle_stop (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentTime to)
1189 auto content = weak_content.lock ();
1194 if (!_active_texts[static_cast<int>(content->type())].have(weak_content)) {
1198 auto piece = weak_piece.lock ();
1203 DCPTime const dcp_to = content_time_to_dcp (piece, to);
1205 if (dcp_to > piece->content->end(_film)) {
1209 auto from = _active_texts[static_cast<int>(content->type())].add_to(weak_content, dcp_to);
1211 bool const always = (content->type() == TextType::OPEN_SUBTITLE && _always_burn_open_subtitles);
1212 if (content->use() && !always && !content->burn()) {
1213 Text (from.first, content->type(), content->dcp_track().get_value_or(DCPTextTrack()), DCPTimePeriod(from.second, dcp_to));
1219 Player::seek (DCPTime time, bool accurate)
1221 boost::mutex::scoped_lock lm (_mutex);
1222 LOG_DEBUG_PLAYER("Seek to %1 (%2accurate)", to_string(time), accurate ? "" : "in");
1225 /* We can't seek in this state */
1230 _shuffler->clear ();
1235 if (_audio_processor) {
1236 _audio_processor->flush ();
1239 _audio_merger.clear ();
1240 for (int i = 0; i < static_cast<int>(TextType::COUNT); ++i) {
1241 _active_texts[i].clear ();
1244 for (auto i: _pieces) {
1245 if (time < i->content->position()) {
1246 /* Before; seek to the start of the content. Even if this request is for an inaccurate seek
1247 we must seek this (following) content accurately, otherwise when we come to the end of the current
1248 content we may not start right at the beginning of the next, causing a gap (if the next content has
1249 been trimmed to a point between keyframes, or something).
1251 i->decoder->seek (dcp_to_content_time (i, i->content->position()), true);
1253 } else if (i->content->position() <= time && time < i->content->end(_film)) {
1254 /* During; seek to position */
1255 i->decoder->seek (dcp_to_content_time (i, time), accurate);
1258 /* After; this piece is done */
1264 _next_video_time = time;
1265 _next_video_eyes = Eyes::LEFT;
1266 _next_audio_time = time;
1268 _next_video_time = boost::none;
1269 _next_video_eyes = boost::none;
1270 _next_audio_time = boost::none;
1273 _black.set_position (time);
1274 _silent.set_position (time);
1276 _last_video.clear ();
1281 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1283 if (!_film->three_d()) {
1284 if (pv->eyes() == Eyes::LEFT) {
1285 /* Use left-eye images for both eyes... */
1286 pv->set_eyes (Eyes::BOTH);
1287 } else if (pv->eyes() == Eyes::RIGHT) {
1288 /* ...and discard the right */
1293 /* We need a delay to give a little wiggle room to ensure that relevant subtitles arrive at the
1294 player before the video that requires them.
1296 _delay.push_back (make_pair (pv, time));
1298 if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
1299 _next_video_time = time + one_video_frame();
1301 _next_video_eyes = increment_eyes (pv->eyes());
1303 if (_delay.size() < 3) {
1307 auto to_do = _delay.front();
1309 do_emit_video (to_do.first, to_do.second);
1314 Player::do_emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1316 if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
1317 for (int i = 0; i < static_cast<int>(TextType::COUNT); ++i) {
1318 _active_texts[i].clear_before (time);
1322 auto subtitles = open_subtitles_for_frame (time);
1324 pv->set_text (subtitles.get ());
1327 LOG_DEBUG_PLAYER("Player --> Video %1 %2", to_string(time), static_cast<int>(pv->eyes()));
1333 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1335 /* Log if the assert below is about to fail */
1336 if (_next_audio_time && labs(time.get() - _next_audio_time->get()) > 1) {
1337 _film->log()->log(String::compose("Out-of-sequence emit %1 vs %2", to_string(time), to_string(*_next_audio_time)), LogEntry::TYPE_WARNING);
1340 /* This audio must follow on from the previous, allowing for half a sample (at 48kHz) leeway */
1341 DCPOMATIC_ASSERT (!_next_audio_time || labs(time.get() - _next_audio_time->get()) < 2);
1342 Audio (data, time, _film->audio_frame_rate());
1343 _next_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate());
1348 Player::fill_audio (DCPTimePeriod period)
1350 if (period.from == period.to) {
1354 DCPOMATIC_ASSERT (period.from < period.to);
1356 DCPTime t = period.from;
1357 while (t < period.to) {
1358 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
1359 Frame const samples = block.frames_round(_film->audio_frame_rate());
1361 auto silence = make_shared<AudioBuffers>(_film->audio_channels(), samples);
1362 silence->make_silent ();
1363 emit_audio (silence, t);
1371 Player::one_video_frame () const
1373 return DCPTime::from_frames (1, _film->video_frame_rate ());
1377 pair<shared_ptr<AudioBuffers>, DCPTime>
1378 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1380 auto const discard_time = discard_to - time;
1381 auto const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1382 auto remaining_frames = audio->frames() - discard_frames;
1383 if (remaining_frames <= 0) {
1384 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1386 auto cut = make_shared<AudioBuffers>(audio, remaining_frames, discard_frames);
1387 return make_pair(cut, time + discard_time);
1392 Player::set_dcp_decode_reduction (optional<int> reduction)
1394 Change (ChangeType::PENDING, PlayerProperty::DCP_DECODE_REDUCTION, false);
1397 boost::mutex::scoped_lock lm (_mutex);
1399 if (reduction == _dcp_decode_reduction) {
1401 Change (ChangeType::CANCELLED, PlayerProperty::DCP_DECODE_REDUCTION, false);
1405 _dcp_decode_reduction = reduction;
1406 setup_pieces_unlocked ();
1409 Change (ChangeType::DONE, PlayerProperty::DCP_DECODE_REDUCTION, false);
1414 Player::content_time_to_dcp (shared_ptr<const Content> content, ContentTime t)
1416 boost::mutex::scoped_lock lm (_mutex);
1418 for (auto i: _pieces) {
1419 if (i->content == content) {
1420 return content_time_to_dcp (i, t);
1424 /* We couldn't find this content; perhaps things are being changed over */
1429 optional<ContentTime>
1430 Player::dcp_to_content_time (shared_ptr<const Content> content, DCPTime t)
1432 boost::mutex::scoped_lock lm (_mutex);
1434 for (auto i: _pieces) {
1435 if (i->content == content) {
1436 return dcp_to_content_time (i, t);
1440 /* We couldn't find this content; perhaps things are being changed over */
1445 shared_ptr<const Playlist>
1446 Player::playlist () const
1448 return _playlist ? _playlist : _film->playlist();
1453 Player::atmos (weak_ptr<Piece> weak_piece, ContentAtmos data)
1459 auto piece = weak_piece.lock ();
1460 DCPOMATIC_ASSERT (piece);
1462 auto const vfr = _film->video_frame_rate();
1464 DCPTime const dcp_time = DCPTime::from_frames(data.frame, vfr) - DCPTime(piece->content->trim_start(), FrameRateChange(vfr, vfr));
1465 if (dcp_time < piece->content->position() || dcp_time >= (piece->content->end(_film))) {
1469 Atmos (data.data, dcp_time, data.metadata);