2 Copyright (C) 2013-2018 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 "audio_buffers.h"
24 #include "content_audio.h"
25 #include "dcp_content.h"
28 #include "raw_image_proxy.h"
31 #include "render_text.h"
33 #include "content_video.h"
34 #include "player_video.h"
35 #include "frame_rate_change.h"
36 #include "audio_processor.h"
38 #include "referenced_reel_asset.h"
39 #include "decoder_factory.h"
41 #include "video_decoder.h"
42 #include "audio_decoder.h"
43 #include "text_content.h"
44 #include "text_decoder.h"
45 #include "ffmpeg_content.h"
46 #include "audio_content.h"
47 #include "dcp_decoder.h"
48 #include "image_decoder.h"
49 #include "compose.hpp"
52 #include <dcp/reel_sound_asset.h>
53 #include <dcp/reel_subtitle_asset.h>
54 #include <dcp/reel_picture_asset.h>
55 #include <dcp/reel_closed_caption_asset.h>
56 #include <boost/foreach.hpp>
73 using boost::shared_ptr;
74 using boost::weak_ptr;
75 using boost::dynamic_pointer_cast;
76 using boost::optional;
77 using boost::scoped_ptr;
79 int const PlayerProperty::VIDEO_CONTAINER_SIZE = 700;
80 int const PlayerProperty::PLAYLIST = 701;
81 int const PlayerProperty::FILM_CONTAINER = 702;
82 int const PlayerProperty::FILM_VIDEO_FRAME_RATE = 703;
83 int const PlayerProperty::DCP_DECODE_REDUCTION = 704;
85 Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist)
87 , _playlist (playlist)
89 , _ignore_video (false)
90 , _ignore_audio (false)
91 , _ignore_text (false)
92 , _always_burn_open_subtitles (false)
94 , _play_referenced (false)
95 , _audio_merger (_film->audio_frame_rate())
98 _film_changed_connection = _film->Change.connect (bind (&Player::film_change, this, _1, _2));
99 /* The butler must hear about this first, so since we are proxying this through to the butler we must
102 _playlist_change_connection = _playlist->Change.connect (bind (&Player::playlist_change, this, _1), boost::signals2::at_front);
103 _playlist_content_change_connection = _playlist->ContentChange.connect (bind(&Player::playlist_content_change, this, _1, _3, _4));
104 set_video_container_size (_film->frame_size ());
106 film_change (CHANGE_TYPE_DONE, Film::AUDIO_PROCESSOR);
109 seek (DCPTime (), true);
118 Player::setup_pieces ()
120 boost::mutex::scoped_lock lm (_mutex);
121 setup_pieces_unlocked ();
125 have_video (shared_ptr<Piece> piece)
127 return piece->decoder && piece->decoder->video;
131 have_audio (shared_ptr<Piece> piece)
133 return piece->decoder && piece->decoder->audio;
137 Player::setup_pieces_unlocked ()
142 _shuffler = new Shuffler();
143 _shuffler->Video.connect(bind(&Player::video, this, _1, _2));
145 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
147 if (!i->paths_valid ()) {
151 if (_ignore_video && _ignore_audio && i->text.empty()) {
152 /* We're only interested in text and this content has none */
156 shared_ptr<Decoder> decoder = decoder_factory (_film, i, _fast);
157 FrameRateChange frc (_film, i);
160 /* Not something that we can decode; e.g. Atmos content */
164 if (decoder->video && _ignore_video) {
165 decoder->video->set_ignore (true);
168 if (decoder->audio && _ignore_audio) {
169 decoder->audio->set_ignore (true);
173 BOOST_FOREACH (shared_ptr<TextDecoder> i, decoder->text) {
174 i->set_ignore (true);
178 shared_ptr<DCPDecoder> dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
180 dcp->set_decode_referenced (_play_referenced);
181 if (_play_referenced) {
182 dcp->set_forced_reduction (_dcp_decode_reduction);
186 shared_ptr<Piece> piece (new Piece (i, decoder, frc));
187 _pieces.push_back (piece);
189 if (decoder->video) {
190 if (i->video->frame_type() == VIDEO_FRAME_TYPE_3D_LEFT || i->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
191 /* We need a Shuffler to cope with 3D L/R video data arriving out of sequence */
192 decoder->video->Data.connect (bind (&Shuffler::video, _shuffler, weak_ptr<Piece>(piece), _1));
194 decoder->video->Data.connect (bind (&Player::video, this, weak_ptr<Piece>(piece), _1));
198 if (decoder->audio) {
199 decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
202 list<shared_ptr<TextDecoder> >::const_iterator j = decoder->text.begin();
204 while (j != decoder->text.end()) {
205 (*j)->BitmapStart.connect (
206 bind(&Player::bitmap_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
208 (*j)->PlainStart.connect (
209 bind(&Player::plain_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
212 bind(&Player::subtitle_stop, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
219 _stream_states.clear ();
220 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
221 if (i->content->audio) {
222 BOOST_FOREACH (AudioStreamPtr j, i->content->audio->streams()) {
223 _stream_states[j] = StreamState (i, i->content->position ());
228 _black = Empty (_film, _pieces, bind(&have_video, _1));
229 _silent = Empty (_film, _pieces, bind(&have_audio, _1));
231 _last_video_time = DCPTime ();
232 _last_video_eyes = EYES_BOTH;
233 _last_audio_time = DCPTime ();
237 Player::playlist_content_change (ChangeType type, int property, bool frequent)
239 if (type == CHANGE_TYPE_PENDING) {
240 boost::mutex::scoped_lock lm (_mutex);
241 /* The player content is probably about to change, so we can't carry on
242 until that has happened and we've rebuilt our pieces. Stop pass()
243 and seek() from working until then.
246 } else if (type == CHANGE_TYPE_DONE) {
247 /* A change in our content has gone through. Re-build our pieces. */
250 } else if (type == CHANGE_TYPE_CANCELLED) {
251 boost::mutex::scoped_lock lm (_mutex);
255 Change (type, property, frequent);
259 Player::set_video_container_size (dcp::Size s)
261 Change (CHANGE_TYPE_PENDING, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
264 boost::mutex::scoped_lock lm (_mutex);
266 if (s == _video_container_size) {
268 Change (CHANGE_TYPE_CANCELLED, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
272 _video_container_size = s;
274 _black_image.reset (new Image (AV_PIX_FMT_RGB24, _video_container_size, true));
275 _black_image->make_black ();
278 Change (CHANGE_TYPE_DONE, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
282 Player::playlist_change (ChangeType type)
284 if (type == CHANGE_TYPE_DONE) {
287 Change (type, PlayerProperty::PLAYLIST, false);
291 Player::film_change (ChangeType type, Film::Property p)
293 /* Here we should notice Film properties that affect our output, and
294 alert listeners that our output now would be different to how it was
295 last time we were run.
298 if (p == Film::CONTAINER) {
299 Change (type, PlayerProperty::FILM_CONTAINER, false);
300 } else if (p == Film::VIDEO_FRAME_RATE) {
301 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
302 so we need new pieces here.
304 if (type == CHANGE_TYPE_DONE) {
307 Change (type, PlayerProperty::FILM_VIDEO_FRAME_RATE, false);
308 } else if (p == Film::AUDIO_PROCESSOR) {
309 if (type == CHANGE_TYPE_DONE && _film->audio_processor ()) {
310 boost::mutex::scoped_lock lm (_mutex);
311 _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
313 } else if (p == Film::AUDIO_CHANNELS) {
314 if (type == CHANGE_TYPE_DONE) {
315 boost::mutex::scoped_lock lm (_mutex);
316 _audio_merger.clear ();
321 shared_ptr<PlayerVideo>
322 Player::black_player_video_frame (Eyes eyes) const
324 return shared_ptr<PlayerVideo> (
326 shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
329 _video_container_size,
330 _video_container_size,
333 PresetColourConversion::all().front().conversion,
334 boost::weak_ptr<Content>(),
335 boost::optional<Frame>()
341 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
343 DCPTime s = t - piece->content->position ();
344 s = min (piece->content->length_after_trim(_film), s);
345 s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
347 /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
348 then convert that ContentTime to frames at the content's rate. However this fails for
349 situations like content at 29.9978733fps, DCP at 30fps. The accuracy of the Time type is not
350 enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
352 Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
354 return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
358 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
360 /* See comment in dcp_to_content_video */
361 DCPTime const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime(piece->content->trim_start(), piece->frc);
362 return d + piece->content->position();
366 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
368 DCPTime s = t - piece->content->position ();
369 s = min (piece->content->length_after_trim(_film), s);
370 /* See notes in dcp_to_content_video */
371 return max (DCPTime (), DCPTime (piece->content->trim_start (), piece->frc) + s).frames_floor (_film->audio_frame_rate ());
375 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
377 /* See comment in dcp_to_content_video */
378 return DCPTime::from_frames (f, _film->audio_frame_rate())
379 - DCPTime (piece->content->trim_start(), piece->frc)
380 + piece->content->position();
384 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
386 DCPTime s = t - piece->content->position ();
387 s = min (piece->content->length_after_trim(_film), s);
388 return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
392 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
394 return max (DCPTime (), DCPTime (t - piece->content->trim_start(), piece->frc) + piece->content->position());
397 list<shared_ptr<Font> >
398 Player::get_subtitle_fonts ()
400 boost::mutex::scoped_lock lm (_mutex);
402 list<shared_ptr<Font> > fonts;
403 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
404 BOOST_FOREACH (shared_ptr<TextContent> j, i->content->text) {
405 /* XXX: things may go wrong if there are duplicate font IDs
406 with different font files.
408 list<shared_ptr<Font> > f = j->fonts ();
409 copy (f.begin(), f.end(), back_inserter (fonts));
416 /** Set this player never to produce any video data */
418 Player::set_ignore_video ()
420 boost::mutex::scoped_lock lm (_mutex);
421 _ignore_video = true;
422 setup_pieces_unlocked ();
426 Player::set_ignore_audio ()
428 boost::mutex::scoped_lock lm (_mutex);
429 _ignore_audio = true;
430 setup_pieces_unlocked ();
434 Player::set_ignore_text ()
436 boost::mutex::scoped_lock lm (_mutex);
438 setup_pieces_unlocked ();
441 /** Set the player to always burn open texts into the image regardless of the content settings */
443 Player::set_always_burn_open_subtitles ()
445 boost::mutex::scoped_lock lm (_mutex);
446 _always_burn_open_subtitles = true;
449 /** Sets up the player to be faster, possibly at the expense of quality */
453 boost::mutex::scoped_lock lm (_mutex);
455 setup_pieces_unlocked ();
459 Player::set_play_referenced ()
461 boost::mutex::scoped_lock lm (_mutex);
462 _play_referenced = true;
463 setup_pieces_unlocked ();
467 maybe_add_asset (list<ReferencedReelAsset>& a, shared_ptr<dcp::ReelAsset> r, Frame reel_trim_start, Frame reel_trim_end, DCPTime from, int const ffr)
469 DCPOMATIC_ASSERT (r);
470 r->set_entry_point (r->entry_point() + reel_trim_start);
471 r->set_duration (r->duration() - reel_trim_start - reel_trim_end);
472 if (r->duration() > 0) {
474 ReferencedReelAsset(r, DCPTimePeriod(from, from + DCPTime::from_frames(r->duration(), ffr)))
479 list<ReferencedReelAsset>
480 Player::get_reel_assets ()
482 /* Does not require a lock on _mutex as it's only called from DCPEncoder */
484 list<ReferencedReelAsset> a;
486 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
487 shared_ptr<DCPContent> j = dynamic_pointer_cast<DCPContent> (i);
492 scoped_ptr<DCPDecoder> decoder;
494 decoder.reset (new DCPDecoder (_film, j, false));
499 DCPOMATIC_ASSERT (j->video_frame_rate ());
500 double const cfr = j->video_frame_rate().get();
501 Frame const trim_start = j->trim_start().frames_round (cfr);
502 Frame const trim_end = j->trim_end().frames_round (cfr);
503 int const ffr = _film->video_frame_rate ();
505 /* position in the asset from the start */
506 int64_t offset_from_start = 0;
507 /* position in the asset from the end */
508 int64_t offset_from_end = 0;
509 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
510 /* Assume that main picture duration is the length of the reel */
511 offset_from_end += k->main_picture()->duration();
514 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
516 /* Assume that main picture duration is the length of the reel */
517 int64_t const reel_duration = k->main_picture()->duration();
519 /* See doc/design/trim_reels.svg */
520 Frame const reel_trim_start = min(reel_duration, max(int64_t(0), trim_start - offset_from_start));
521 Frame const reel_trim_end = min(reel_duration, max(int64_t(0), reel_duration - (offset_from_end - trim_end)));
523 DCPTime const from = i->position() + DCPTime::from_frames (offset_from_start, _film->video_frame_rate());
524 if (j->reference_video ()) {
525 maybe_add_asset (a, k->main_picture(), reel_trim_start, reel_trim_end, from, ffr);
528 if (j->reference_audio ()) {
529 maybe_add_asset (a, k->main_sound(), reel_trim_start, reel_trim_end, from, ffr);
532 if (j->reference_text (TEXT_OPEN_SUBTITLE)) {
533 maybe_add_asset (a, k->main_subtitle(), reel_trim_start, reel_trim_end, from, ffr);
536 if (j->reference_text (TEXT_CLOSED_CAPTION)) {
537 BOOST_FOREACH (shared_ptr<dcp::ReelClosedCaptionAsset> l, k->closed_captions()) {
538 maybe_add_asset (a, l, reel_trim_start, reel_trim_end, from, ffr);
542 offset_from_start += reel_duration;
543 offset_from_end -= reel_duration;
553 boost::mutex::scoped_lock lm (_mutex);
556 /* We can't pass in this state */
560 if (_playlist->length(_film) == DCPTime()) {
561 /* Special case of an empty Film; just give one black frame */
562 emit_video (black_player_video_frame(EYES_BOTH), DCPTime());
566 /* Find the decoder or empty which is farthest behind where we are and make it emit some data */
568 shared_ptr<Piece> earliest_content;
569 optional<DCPTime> earliest_time;
571 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
576 DCPTime const t = content_time_to_dcp (i, max(i->decoder->position(), i->content->trim_start()));
577 if (t > i->content->end(_film)) {
581 /* Given two choices at the same time, pick the one with texts so we see it before
584 if (!earliest_time || t < *earliest_time || (t == *earliest_time && !i->decoder->text.empty())) {
586 earliest_content = i;
600 if (earliest_content) {
604 if (!_black.done() && (!earliest_time || _black.position() < *earliest_time)) {
605 earliest_time = _black.position ();
609 if (!_silent.done() && (!earliest_time || _silent.position() < *earliest_time)) {
610 earliest_time = _silent.position ();
617 earliest_content->done = earliest_content->decoder->pass ();
618 shared_ptr<DCPContent> dcp = dynamic_pointer_cast<DCPContent>(earliest_content->content);
619 if (dcp && !_play_referenced && dcp->reference_audio()) {
620 /* We are skipping some referenced DCP audio content, so we need to update _last_audio_time
621 to `hide' the fact that no audio was emitted during the referenced DCP (though
622 we need to behave as though it was).
624 _last_audio_time = dcp->end (_film);
629 emit_video (black_player_video_frame(EYES_BOTH), _black.position());
630 _black.set_position (_black.position() + one_video_frame());
634 DCPTimePeriod period (_silent.period_at_position());
635 if (_last_audio_time) {
636 /* Sometimes the thing that happened last finishes fractionally before
637 or after this silence. Bodge the start time of the silence to fix it.
639 int64_t const error = labs(period.from.get() - _last_audio_time->get());
641 _film->log()->log(String::compose("Silence starting before or after last audio by %1", error), LogEntry::TYPE_ERROR);
643 DCPOMATIC_ASSERT (error < 2);
644 period.from = *_last_audio_time;
646 if (period.duration() > one_video_frame()) {
647 period.to = period.from + one_video_frame();
650 _silent.set_position (period.to);
658 /* Emit any audio that is ready */
660 /* Work out the time before which the audio is definitely all here. This is the earliest last_push_end of one
661 of our streams, or the position of the _silent.
663 DCPTime pull_to = _film->length ();
664 for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
665 if (!i->second.piece->done && i->second.last_push_end < pull_to) {
666 pull_to = i->second.last_push_end;
669 if (!_silent.done() && _silent.position() < pull_to) {
670 pull_to = _silent.position();
673 list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_to);
674 for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
675 if (_last_audio_time && i->second < *_last_audio_time) {
676 /* This new data comes before the last we emitted (or the last seek); discard it */
677 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
682 } else if (_last_audio_time && i->second > *_last_audio_time) {
683 /* There's a gap between this data and the last we emitted; fill with silence */
684 fill_audio (DCPTimePeriod (*_last_audio_time, i->second));
687 emit_audio (i->first, i->second);
692 for (list<pair<shared_ptr<PlayerVideo>, DCPTime> >::const_iterator i = _delay.begin(); i != _delay.end(); ++i) {
693 do_emit_video(i->first, i->second);
700 /** @return Open subtitles for the frame at the given time, converted to images */
701 optional<PositionImage>
702 Player::open_subtitles_for_frame (DCPTime time) const
704 list<PositionImage> captions;
705 int const vfr = _film->video_frame_rate();
709 _active_texts[TEXT_OPEN_SUBTITLE].get_burnt(DCPTimePeriod(time, time + DCPTime::from_frames(1, vfr)), _always_burn_open_subtitles)
712 /* Bitmap subtitles */
713 BOOST_FOREACH (BitmapText i, j.bitmap) {
718 /* i.image will already have been scaled to fit _video_container_size */
719 dcp::Size scaled_size (i.rectangle.width * _video_container_size.width, i.rectangle.height * _video_container_size.height);
725 lrint (_video_container_size.width * i.rectangle.x),
726 lrint (_video_container_size.height * i.rectangle.y)
732 /* String subtitles (rendered to an image) */
733 if (!j.string.empty ()) {
734 list<PositionImage> s = render_text (j.string, j.fonts, _video_container_size, time, vfr);
735 copy (s.begin(), s.end(), back_inserter (captions));
739 if (captions.empty ()) {
740 return optional<PositionImage> ();
743 return merge (captions);
747 Player::video (weak_ptr<Piece> wp, ContentVideo video)
749 shared_ptr<Piece> piece = wp.lock ();
754 FrameRateChange frc (_film, piece->content);
755 if (frc.skip && (video.frame % 2) == 1) {
759 /* Time of the first frame we will emit */
760 DCPTime const time = content_video_to_dcp (piece, video.frame);
762 /* Discard if it's before the content's period or the last accurate seek. We can't discard
763 if it's after the content's period here as in that case we still need to fill any gap between
764 `now' and the end of the content's period.
766 if (time < piece->content->position() || (_last_video_time && time < *_last_video_time)) {
770 /* Fill gaps that we discover now that we have some video which needs to be emitted.
771 This is where we need to fill to.
773 DCPTime fill_to = min (time, piece->content->end(_film));
775 if (_last_video_time) {
776 DCPTime fill_from = max (*_last_video_time, piece->content->position());
778 /* Fill if we have more than half a frame to do */
779 if ((fill_to - fill_from) > one_video_frame() / 2) {
780 LastVideoMap::const_iterator last = _last_video.find (wp);
781 if (_film->three_d()) {
782 Eyes fill_to_eyes = video.eyes;
783 if (fill_to_eyes == EYES_BOTH) {
784 fill_to_eyes = EYES_LEFT;
786 if (fill_to == piece->content->end(_film)) {
787 /* Don't fill after the end of the content */
788 fill_to_eyes = EYES_LEFT;
790 DCPTime j = fill_from;
791 Eyes eyes = _last_video_eyes.get_value_or(EYES_LEFT);
792 if (eyes == EYES_BOTH) {
795 while (j < fill_to || eyes != fill_to_eyes) {
796 if (last != _last_video.end()) {
797 shared_ptr<PlayerVideo> copy = last->second->shallow_copy();
798 copy->set_eyes (eyes);
799 emit_video (copy, j);
801 emit_video (black_player_video_frame(eyes), j);
803 if (eyes == EYES_RIGHT) {
804 j += one_video_frame();
806 eyes = increment_eyes (eyes);
809 for (DCPTime j = fill_from; j < fill_to; j += one_video_frame()) {
810 if (last != _last_video.end()) {
811 emit_video (last->second, j);
813 emit_video (black_player_video_frame(EYES_BOTH), j);
820 _last_video[wp].reset (
823 piece->content->video->crop (),
824 piece->content->video->fade (_film, video.frame),
825 piece->content->video->scale().size (
826 piece->content->video, _video_container_size, _film->frame_size ()
828 _video_container_size,
831 piece->content->video->colour_conversion(),
838 for (int i = 0; i < frc.repeat; ++i) {
839 if (t < piece->content->end(_film)) {
840 emit_video (_last_video[wp], t);
842 t += one_video_frame ();
847 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
849 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
851 shared_ptr<Piece> piece = wp.lock ();
856 shared_ptr<AudioContent> content = piece->content->audio;
857 DCPOMATIC_ASSERT (content);
859 /* Compute time in the DCP */
860 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame);
861 /* And the end of this block in the DCP */
862 DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate(_film));
864 /* Remove anything that comes before the start or after the end of the content */
865 if (time < piece->content->position()) {
866 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
868 /* This audio is entirely discarded */
871 content_audio.audio = cut.first;
873 } else if (time > piece->content->end(_film)) {
876 } else if (end > piece->content->end(_film)) {
877 Frame const remaining_frames = DCPTime(piece->content->end(_film) - time).frames_round(_film->audio_frame_rate());
878 if (remaining_frames == 0) {
881 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
882 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
883 content_audio.audio = cut;
886 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
890 if (content->gain() != 0) {
891 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
892 gain->apply_gain (content->gain ());
893 content_audio.audio = gain;
898 content_audio.audio = remap (content_audio.audio, _film->audio_channels(), stream->mapping());
902 if (_audio_processor) {
903 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
908 _audio_merger.push (content_audio.audio, time);
909 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
910 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
914 Player::bitmap_text_start (weak_ptr<Piece> wp, weak_ptr<const TextContent> wc, ContentBitmapText subtitle)
916 shared_ptr<Piece> piece = wp.lock ();
917 shared_ptr<const TextContent> text = wc.lock ();
918 if (!piece || !text) {
922 /* Apply content's subtitle offsets */
923 subtitle.sub.rectangle.x += text->x_offset ();
924 subtitle.sub.rectangle.y += text->y_offset ();
926 /* Apply a corrective translation to keep the subtitle centred after the scale that is coming up */
927 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * ((text->x_scale() - 1) / 2);
928 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * ((text->y_scale() - 1) / 2);
930 /* Apply content's subtitle scale */
931 subtitle.sub.rectangle.width *= text->x_scale ();
932 subtitle.sub.rectangle.height *= text->y_scale ();
935 shared_ptr<Image> image = subtitle.sub.image;
936 /* We will scale the subtitle up to fit _video_container_size */
937 dcp::Size scaled_size (subtitle.sub.rectangle.width * _video_container_size.width, subtitle.sub.rectangle.height * _video_container_size.height);
938 ps.bitmap.push_back (BitmapText(image->scale(scaled_size, dcp::YUV_TO_RGB_REC601, image->pixel_format(), true, _fast), subtitle.sub.rectangle));
939 DCPTime from (content_time_to_dcp (piece, subtitle.from()));
941 _active_texts[text->type()].add_from (wc, ps, from);
945 Player::plain_text_start (weak_ptr<Piece> wp, weak_ptr<const TextContent> wc, ContentStringText subtitle)
947 shared_ptr<Piece> piece = wp.lock ();
948 shared_ptr<const TextContent> text = wc.lock ();
949 if (!piece || !text) {
954 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
956 if (from > piece->content->end(_film)) {
960 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
961 s.set_h_position (s.h_position() + text->x_offset ());
962 s.set_v_position (s.v_position() + text->y_offset ());
963 float const xs = text->x_scale();
964 float const ys = text->y_scale();
965 float size = s.size();
967 /* Adjust size to express the common part of the scaling;
968 e.g. if xs = ys = 0.5 we scale size by 2.
970 if (xs > 1e-5 && ys > 1e-5) {
971 size *= 1 / min (1 / xs, 1 / ys);
975 /* Then express aspect ratio changes */
976 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
977 s.set_aspect_adjust (xs / ys);
980 s.set_in (dcp::Time(from.seconds(), 1000));
981 ps.string.push_back (StringText (s, text->outline_width()));
982 ps.add_fonts (text->fonts ());
985 _active_texts[text->type()].add_from (wc, ps, from);
989 Player::subtitle_stop (weak_ptr<Piece> wp, weak_ptr<const TextContent> wc, ContentTime to)
991 shared_ptr<const TextContent> text = wc.lock ();
996 if (!_active_texts[text->type()].have(wc)) {
1000 shared_ptr<Piece> piece = wp.lock ();
1005 DCPTime const dcp_to = content_time_to_dcp (piece, to);
1007 if (dcp_to > piece->content->end(_film)) {
1011 pair<PlayerText, DCPTime> from = _active_texts[text->type()].add_to (wc, dcp_to);
1013 bool const always = (text->type() == TEXT_OPEN_SUBTITLE && _always_burn_open_subtitles);
1014 if (text->use() && !always && !text->burn()) {
1015 Text (from.first, text->type(), text->dcp_track().get_value_or(DCPTextTrack()), DCPTimePeriod (from.second, dcp_to));
1020 Player::seek (DCPTime time, bool accurate)
1022 boost::mutex::scoped_lock lm (_mutex);
1025 /* We can't seek in this state */
1030 _shuffler->clear ();
1035 if (_audio_processor) {
1036 _audio_processor->flush ();
1039 _audio_merger.clear ();
1040 for (int i = 0; i < TEXT_COUNT; ++i) {
1041 _active_texts[i].clear ();
1044 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
1045 if (time < i->content->position()) {
1046 /* Before; seek to the start of the content */
1047 i->decoder->seek (dcp_to_content_time (i, i->content->position()), accurate);
1049 } else if (i->content->position() <= time && time < i->content->end(_film)) {
1050 /* During; seek to position */
1051 i->decoder->seek (dcp_to_content_time (i, time), accurate);
1054 /* After; this piece is done */
1060 _last_video_time = time;
1061 _last_video_eyes = EYES_LEFT;
1062 _last_audio_time = time;
1064 _last_video_time = optional<DCPTime>();
1065 _last_video_eyes = optional<Eyes>();
1066 _last_audio_time = optional<DCPTime>();
1069 _black.set_position (time);
1070 _silent.set_position (time);
1072 _last_video.clear ();
1076 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1078 /* We need a delay to give a little wiggle room to ensure that relevent subtitles arrive at the
1079 player before the video that requires them.
1081 _delay.push_back (make_pair (pv, time));
1083 if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
1084 _last_video_time = time + one_video_frame();
1086 _last_video_eyes = increment_eyes (pv->eyes());
1088 if (_delay.size() < 3) {
1092 pair<shared_ptr<PlayerVideo>, DCPTime> to_do = _delay.front();
1094 do_emit_video (to_do.first, to_do.second);
1098 Player::do_emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1100 if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
1101 for (int i = 0; i < TEXT_COUNT; ++i) {
1102 _active_texts[i].clear_before (time);
1106 optional<PositionImage> subtitles = open_subtitles_for_frame (time);
1108 pv->set_text (subtitles.get ());
1115 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1117 /* Log if the assert below is about to fail */
1118 if (_last_audio_time && labs(time.get() - _last_audio_time->get()) > 1) {
1119 _film->log()->log(String::compose("Out-of-sequence emit %1 vs %2", to_string(time), to_string(*_last_audio_time)), LogEntry::TYPE_WARNING);
1122 /* This audio must follow on from the previous, allowing for half a sample (at 48kHz) leeway */
1123 DCPOMATIC_ASSERT (!_last_audio_time || labs(time.get() - _last_audio_time->get()) < 2);
1124 Audio (data, time, _film->audio_frame_rate());
1125 _last_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate());
1129 Player::fill_audio (DCPTimePeriod period)
1131 if (period.from == period.to) {
1135 DCPOMATIC_ASSERT (period.from < period.to);
1137 DCPTime t = period.from;
1138 while (t < period.to) {
1139 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
1140 Frame const samples = block.frames_round(_film->audio_frame_rate());
1142 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
1143 silence->make_silent ();
1144 emit_audio (silence, t);
1151 Player::one_video_frame () const
1153 return DCPTime::from_frames (1, _film->video_frame_rate ());
1156 pair<shared_ptr<AudioBuffers>, DCPTime>
1157 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1159 DCPTime const discard_time = discard_to - time;
1160 Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1161 Frame remaining_frames = audio->frames() - discard_frames;
1162 if (remaining_frames <= 0) {
1163 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1165 shared_ptr<AudioBuffers> cut (new AudioBuffers (audio->channels(), remaining_frames));
1166 cut->copy_from (audio.get(), remaining_frames, discard_frames, 0);
1167 return make_pair(cut, time + discard_time);
1171 Player::set_dcp_decode_reduction (optional<int> reduction)
1173 Change (CHANGE_TYPE_PENDING, PlayerProperty::DCP_DECODE_REDUCTION, false);
1176 boost::mutex::scoped_lock lm (_mutex);
1178 if (reduction == _dcp_decode_reduction) {
1180 Change (CHANGE_TYPE_CANCELLED, PlayerProperty::DCP_DECODE_REDUCTION, false);
1184 _dcp_decode_reduction = reduction;
1185 setup_pieces_unlocked ();
1188 Change (CHANGE_TYPE_DONE, PlayerProperty::DCP_DECODE_REDUCTION, false);
1192 Player::content_time_to_dcp (shared_ptr<Content> content, ContentTime t)
1194 boost::mutex::scoped_lock lm (_mutex);
1196 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
1197 if (i->content == content) {
1198 return content_time_to_dcp (i, t);
1202 /* We couldn't find this content; perhaps things are being changed over */
1203 return optional<DCPTime>();