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 <boost/foreach.hpp>
62 #define LOG_GENERAL(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
74 using boost::shared_ptr;
75 using boost::weak_ptr;
76 using boost::dynamic_pointer_cast;
77 using boost::optional;
78 using boost::scoped_ptr;
80 int const PlayerProperty::VIDEO_CONTAINER_SIZE = 700;
81 int const PlayerProperty::PLAYLIST = 701;
82 int const PlayerProperty::FILM_CONTAINER = 702;
83 int const PlayerProperty::FILM_VIDEO_FRAME_RATE = 703;
84 int const PlayerProperty::DCP_DECODE_REDUCTION = 704;
86 Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist)
88 , _playlist (playlist)
89 , _have_valid_pieces (false)
90 , _ignore_video (false)
91 , _ignore_subtitle (false)
92 , _always_burn_subtitles (false)
94 , _play_referenced (false)
95 , _audio_merger (_film->audio_frame_rate())
98 _film_changed_connection = _film->Changed.connect (bind (&Player::film_changed, this, _1));
99 _playlist_changed_connection = _playlist->Changed.connect (bind (&Player::playlist_changed, this));
100 _playlist_content_changed_connection = _playlist->ContentChanged.connect (bind (&Player::playlist_content_changed, this, _1, _2, _3));
101 set_video_container_size (_film->frame_size ());
103 film_changed (Film::AUDIO_PROCESSOR);
105 seek (DCPTime (), true);
114 Player::setup_pieces ()
119 _shuffler = new Shuffler();
120 _shuffler->Video.connect(bind(&Player::video, this, _1, _2));
122 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
124 if (!i->paths_valid ()) {
128 shared_ptr<Decoder> decoder = decoder_factory (i, _film->log(), _fast);
129 FrameRateChange frc (i->active_video_frame_rate(), _film->video_frame_rate());
132 /* Not something that we can decode; e.g. Atmos content */
136 if (decoder->video && _ignore_video) {
137 decoder->video->set_ignore (true);
140 if (decoder->subtitle && _ignore_subtitle) {
141 decoder->subtitle->set_ignore (true);
144 shared_ptr<DCPDecoder> dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
146 dcp->set_decode_referenced (_play_referenced);
147 if (_play_referenced) {
148 dcp->set_forced_reduction (_dcp_decode_reduction);
152 shared_ptr<Piece> piece (new Piece (i, decoder, frc));
153 _pieces.push_back (piece);
155 if (decoder->video) {
156 if (i->video->frame_type() == VIDEO_FRAME_TYPE_3D_LEFT || i->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
157 /* We need a Shuffler to cope with 3D L/R video data arriving out of sequence */
158 decoder->video->Data.connect (bind (&Shuffler::video, _shuffler, weak_ptr<Piece>(piece), _1));
160 decoder->video->Data.connect (bind (&Player::video, this, weak_ptr<Piece>(piece), _1));
164 if (decoder->audio) {
165 decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
168 if (decoder->subtitle) {
169 decoder->subtitle->BitmapStart.connect (bind (&Player::bitmap_text_start, this, weak_ptr<Piece> (piece), _1));
170 decoder->subtitle->PlainStart.connect (bind (&Player::plain_text_start, this, weak_ptr<Piece> (piece), _1));
171 decoder->subtitle->Stop.connect (bind (&Player::subtitle_stop, this, weak_ptr<Piece> (piece), _1, _2));
175 _stream_states.clear ();
176 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
177 if (i->content->audio) {
178 BOOST_FOREACH (AudioStreamPtr j, i->content->audio->streams()) {
179 _stream_states[j] = StreamState (i, i->content->position ());
184 _black = Empty (_film->content(), _film->length(), bind(&Content::video, _1));
185 _silent = Empty (_film->content(), _film->length(), bind(&Content::audio, _1));
187 _last_video_time = DCPTime ();
188 _last_video_eyes = EYES_BOTH;
189 _last_audio_time = DCPTime ();
190 _have_valid_pieces = true;
194 Player::playlist_content_changed (weak_ptr<Content> w, int property, bool frequent)
196 shared_ptr<Content> c = w.lock ();
202 property == ContentProperty::POSITION ||
203 property == ContentProperty::LENGTH ||
204 property == ContentProperty::TRIM_START ||
205 property == ContentProperty::TRIM_END ||
206 property == ContentProperty::PATH ||
207 property == VideoContentProperty::FRAME_TYPE ||
208 property == VideoContentProperty::COLOUR_CONVERSION ||
209 property == AudioContentProperty::STREAMS ||
210 property == DCPContentProperty::NEEDS_ASSETS ||
211 property == DCPContentProperty::NEEDS_KDM ||
212 property == TextContentProperty::COLOUR ||
213 property == TextContentProperty::EFFECT ||
214 property == TextContentProperty::EFFECT_COLOUR ||
215 property == FFmpegContentProperty::SUBTITLE_STREAM ||
216 property == FFmpegContentProperty::FILTERS
219 _have_valid_pieces = false;
220 Changed (property, frequent);
223 property == TextContentProperty::LINE_SPACING ||
224 property == TextContentProperty::OUTLINE_WIDTH ||
225 property == TextContentProperty::Y_SCALE ||
226 property == TextContentProperty::FADE_IN ||
227 property == TextContentProperty::FADE_OUT ||
228 property == ContentProperty::VIDEO_FRAME_RATE ||
229 property == TextContentProperty::USE ||
230 property == TextContentProperty::X_OFFSET ||
231 property == TextContentProperty::Y_OFFSET ||
232 property == TextContentProperty::X_SCALE ||
233 property == TextContentProperty::FONTS ||
234 property == VideoContentProperty::CROP ||
235 property == VideoContentProperty::SCALE ||
236 property == VideoContentProperty::FADE_IN ||
237 property == VideoContentProperty::FADE_OUT
240 Changed (property, frequent);
245 Player::set_video_container_size (dcp::Size s)
247 if (s == _video_container_size) {
251 _video_container_size = s;
253 _black_image.reset (new Image (AV_PIX_FMT_RGB24, _video_container_size, true));
254 _black_image->make_black ();
256 Changed (PlayerProperty::VIDEO_CONTAINER_SIZE, false);
260 Player::playlist_changed ()
262 _have_valid_pieces = false;
263 Changed (PlayerProperty::PLAYLIST, false);
267 Player::film_changed (Film::Property p)
269 /* Here we should notice Film properties that affect our output, and
270 alert listeners that our output now would be different to how it was
271 last time we were run.
274 if (p == Film::CONTAINER) {
275 Changed (PlayerProperty::FILM_CONTAINER, false);
276 } else if (p == Film::VIDEO_FRAME_RATE) {
277 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
278 so we need new pieces here.
280 _have_valid_pieces = false;
281 Changed (PlayerProperty::FILM_VIDEO_FRAME_RATE, false);
282 } else if (p == Film::AUDIO_PROCESSOR) {
283 if (_film->audio_processor ()) {
284 _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
286 } else if (p == Film::AUDIO_CHANNELS) {
287 _audio_merger.clear ();
292 Player::transform_bitmap_texts (list<BitmapText> subs) const
294 list<PositionImage> all;
296 for (list<BitmapText>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
301 /* We will scale the subtitle up to fit _video_container_size */
302 dcp::Size scaled_size (i->rectangle.width * _video_container_size.width, i->rectangle.height * _video_container_size.height);
308 dcp::YUV_TO_RGB_REC601,
309 i->image->pixel_format (),
314 lrint (_video_container_size.width * i->rectangle.x),
315 lrint (_video_container_size.height * i->rectangle.y)
324 shared_ptr<PlayerVideo>
325 Player::black_player_video_frame (Eyes eyes) const
327 return shared_ptr<PlayerVideo> (
329 shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
332 _video_container_size,
333 _video_container_size,
336 PresetColourConversion::all().front().conversion,
337 boost::weak_ptr<Content>(),
338 boost::optional<Frame>()
344 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
346 DCPTime s = t - piece->content->position ();
347 s = min (piece->content->length_after_trim(), s);
348 s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
350 /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
351 then convert that ContentTime to frames at the content's rate. However this fails for
352 situations like content at 29.9978733fps, DCP at 30fps. The accuracy of the Time type is not
353 enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
355 Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
357 return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
361 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
363 /* See comment in dcp_to_content_video */
364 DCPTime const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime(piece->content->trim_start(), piece->frc);
365 return d + piece->content->position();
369 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
371 DCPTime s = t - piece->content->position ();
372 s = min (piece->content->length_after_trim(), s);
373 /* See notes in dcp_to_content_video */
374 return max (DCPTime (), DCPTime (piece->content->trim_start (), piece->frc) + s).frames_floor (_film->audio_frame_rate ());
378 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
380 /* See comment in dcp_to_content_video */
381 return DCPTime::from_frames (f, _film->audio_frame_rate())
382 - DCPTime (piece->content->trim_start(), piece->frc)
383 + piece->content->position();
387 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
389 DCPTime s = t - piece->content->position ();
390 s = min (piece->content->length_after_trim(), s);
391 return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
395 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
397 return max (DCPTime (), DCPTime (t - piece->content->trim_start(), piece->frc) + piece->content->position());
400 list<shared_ptr<Font> >
401 Player::get_subtitle_fonts ()
403 if (!_have_valid_pieces) {
407 list<shared_ptr<Font> > fonts;
408 BOOST_FOREACH (shared_ptr<Piece>& p, _pieces) {
409 if (p->content->subtitle) {
410 /* XXX: things may go wrong if there are duplicate font IDs
411 with different font files.
413 list<shared_ptr<Font> > f = p->content->subtitle->fonts ();
414 copy (f.begin(), f.end(), back_inserter (fonts));
421 /** Set this player never to produce any video data */
423 Player::set_ignore_video ()
425 _ignore_video = true;
429 Player::set_ignore_subtitle ()
431 _ignore_subtitle = true;
434 /** Set whether or not this player should always burn text subtitles into the image,
435 * regardless of the content settings.
436 * @param burn true to always burn subtitles, false to obey content settings.
439 Player::set_always_burn_subtitles (bool burn)
441 _always_burn_subtitles = burn;
444 /** Sets up the player to be faster, possibly at the expense of quality */
449 _have_valid_pieces = false;
453 Player::set_play_referenced ()
455 _play_referenced = true;
456 _have_valid_pieces = false;
459 list<ReferencedReelAsset>
460 Player::get_reel_assets ()
462 list<ReferencedReelAsset> a;
464 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
465 shared_ptr<DCPContent> j = dynamic_pointer_cast<DCPContent> (i);
470 scoped_ptr<DCPDecoder> decoder;
472 decoder.reset (new DCPDecoder (j, _film->log(), false));
478 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
480 DCPOMATIC_ASSERT (j->video_frame_rate ());
481 double const cfr = j->video_frame_rate().get();
482 Frame const trim_start = j->trim_start().frames_round (cfr);
483 Frame const trim_end = j->trim_end().frames_round (cfr);
484 int const ffr = _film->video_frame_rate ();
486 DCPTime const from = i->position() + DCPTime::from_frames (offset, _film->video_frame_rate());
487 if (j->reference_video ()) {
488 shared_ptr<dcp::ReelAsset> ra = k->main_picture ();
489 DCPOMATIC_ASSERT (ra);
490 ra->set_entry_point (ra->entry_point() + trim_start);
491 ra->set_duration (ra->duration() - trim_start - trim_end);
493 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
497 if (j->reference_audio ()) {
498 shared_ptr<dcp::ReelAsset> ra = k->main_sound ();
499 DCPOMATIC_ASSERT (ra);
500 ra->set_entry_point (ra->entry_point() + trim_start);
501 ra->set_duration (ra->duration() - trim_start - trim_end);
503 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
507 if (j->reference_subtitle ()) {
508 shared_ptr<dcp::ReelAsset> ra = k->main_subtitle ();
509 DCPOMATIC_ASSERT (ra);
510 ra->set_entry_point (ra->entry_point() + trim_start);
511 ra->set_duration (ra->duration() - trim_start - trim_end);
513 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
517 /* Assume that main picture duration is the length of the reel */
518 offset += k->main_picture()->duration ();
528 if (!_have_valid_pieces) {
532 if (_playlist->length() == DCPTime()) {
533 /* Special case of an empty Film; just give one black frame */
534 emit_video (black_player_video_frame(EYES_BOTH), DCPTime());
538 /* Find the decoder or empty which is farthest behind where we are and make it emit some data */
540 shared_ptr<Piece> earliest_content;
541 optional<DCPTime> earliest_time;
543 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
548 DCPTime const t = content_time_to_dcp (i, max(i->decoder->position(), i->content->trim_start()));
549 if (t > i->content->end()) {
553 /* Given two choices at the same time, pick the one with a subtitle so we see it before
556 if (!earliest_time || t < *earliest_time || (t == *earliest_time && i->decoder->subtitle)) {
558 earliest_content = i;
572 if (earliest_content) {
576 if (!_black.done() && (!earliest_time || _black.position() < *earliest_time)) {
577 earliest_time = _black.position ();
581 if (!_silent.done() && (!earliest_time || _silent.position() < *earliest_time)) {
582 earliest_time = _silent.position ();
588 earliest_content->done = earliest_content->decoder->pass ();
591 emit_video (black_player_video_frame(EYES_BOTH), _black.position());
592 _black.set_position (_black.position() + one_video_frame());
596 DCPTimePeriod period (_silent.period_at_position());
597 if (_last_audio_time) {
598 /* Sometimes the thing that happened last finishes fractionally before
599 this silence. Bodge the start time of the silence to fix it. I'm
600 not sure if this is the right solution --- maybe the last thing should
601 be padded `forward' rather than this thing padding `back'.
603 period.from = min(period.from, *_last_audio_time);
605 if (period.duration() > one_video_frame()) {
606 period.to = period.from + one_video_frame();
609 _silent.set_position (period.to);
617 /* Emit any audio that is ready */
619 /* Work out the time before which the audio is definitely all here. This is the earliest last_push_end of one
620 of our streams, or the position of the _silent.
622 DCPTime pull_to = _film->length ();
623 for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
624 if (!i->second.piece->done && i->second.last_push_end < pull_to) {
625 pull_to = i->second.last_push_end;
628 if (!_silent.done() && _silent.position() < pull_to) {
629 pull_to = _silent.position();
632 list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_to);
633 for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
634 if (_last_audio_time && i->second < *_last_audio_time) {
635 /* This new data comes before the last we emitted (or the last seek); discard it */
636 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
641 } else if (_last_audio_time && i->second > *_last_audio_time) {
642 /* There's a gap between this data and the last we emitted; fill with silence */
643 fill_audio (DCPTimePeriod (*_last_audio_time, i->second));
646 emit_audio (i->first, i->second);
651 for (list<pair<shared_ptr<PlayerVideo>, DCPTime> >::const_iterator i = _delay.begin(); i != _delay.end(); ++i) {
652 do_emit_video(i->first, i->second);
659 optional<PositionImage>
660 Player::subtitles_for_frame (DCPTime time) const
662 list<PositionImage> subtitles;
664 int const vfr = _film->video_frame_rate();
666 BOOST_FOREACH (PlayerCaption i, _active_text[TEXT_SUBTITLE].get_burnt (DCPTimePeriod(time, time + DCPTime::from_frames(1, vfr)), _always_burn_subtitles)) {
668 /* Image subtitles */
669 list<PositionImage> c = transform_bitmap_texts (i.image);
670 copy (c.begin(), c.end(), back_inserter (subtitles));
672 /* Text subtitles (rendered to an image) */
673 if (!i.text.empty ()) {
674 list<PositionImage> s = render_text (i.text, i.fonts, _video_container_size, time, vfr);
675 copy (s.begin(), s.end(), back_inserter (subtitles));
679 if (subtitles.empty ()) {
680 return optional<PositionImage> ();
683 return merge (subtitles);
687 Player::video (weak_ptr<Piece> wp, ContentVideo video)
689 shared_ptr<Piece> piece = wp.lock ();
694 FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
695 if (frc.skip && (video.frame % 2) == 1) {
699 /* Time of the first frame we will emit */
700 DCPTime const time = content_video_to_dcp (piece, video.frame);
702 /* Discard if it's before the content's period or the last accurate seek. We can't discard
703 if it's after the content's period here as in that case we still need to fill any gap between
704 `now' and the end of the content's period.
706 if (time < piece->content->position() || (_last_video_time && time < *_last_video_time)) {
710 /* Fill gaps that we discover now that we have some video which needs to be emitted.
711 This is where we need to fill to.
713 DCPTime fill_to = min (time, piece->content->end());
715 if (_last_video_time) {
716 DCPTime fill_from = max (*_last_video_time, piece->content->position());
717 LastVideoMap::const_iterator last = _last_video.find (wp);
718 if (_film->three_d()) {
719 DCPTime j = fill_from;
720 Eyes eyes = _last_video_eyes.get_value_or(EYES_LEFT);
721 if (eyes == EYES_BOTH) {
724 while (j < fill_to || eyes != video.eyes) {
725 if (last != _last_video.end()) {
726 shared_ptr<PlayerVideo> copy = last->second->shallow_copy();
727 copy->set_eyes (eyes);
728 emit_video (copy, j);
730 emit_video (black_player_video_frame(eyes), j);
732 if (eyes == EYES_RIGHT) {
733 j += one_video_frame();
735 eyes = increment_eyes (eyes);
738 for (DCPTime j = fill_from; j < fill_to; j += one_video_frame()) {
739 if (last != _last_video.end()) {
740 emit_video (last->second, j);
742 emit_video (black_player_video_frame(EYES_BOTH), j);
748 _last_video[wp].reset (
751 piece->content->video->crop (),
752 piece->content->video->fade (video.frame),
753 piece->content->video->scale().size (
754 piece->content->video, _video_container_size, _film->frame_size ()
756 _video_container_size,
759 piece->content->video->colour_conversion(),
766 for (int i = 0; i < frc.repeat; ++i) {
767 if (t < piece->content->end()) {
768 emit_video (_last_video[wp], t);
770 t += one_video_frame ();
775 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
777 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
779 shared_ptr<Piece> piece = wp.lock ();
784 shared_ptr<AudioContent> content = piece->content->audio;
785 DCPOMATIC_ASSERT (content);
787 /* Compute time in the DCP */
788 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame);
789 /* And the end of this block in the DCP */
790 DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate());
792 /* Remove anything that comes before the start or after the end of the content */
793 if (time < piece->content->position()) {
794 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
796 /* This audio is entirely discarded */
799 content_audio.audio = cut.first;
801 } else if (time > piece->content->end()) {
804 } else if (end > piece->content->end()) {
805 Frame const remaining_frames = DCPTime(piece->content->end() - time).frames_round(_film->audio_frame_rate());
806 if (remaining_frames == 0) {
809 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
810 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
811 content_audio.audio = cut;
814 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
818 if (content->gain() != 0) {
819 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
820 gain->apply_gain (content->gain ());
821 content_audio.audio = gain;
826 content_audio.audio = remap (content_audio.audio, _film->audio_channels(), stream->mapping());
830 if (_audio_processor) {
831 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
836 _audio_merger.push (content_audio.audio, time);
837 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
838 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
842 Player::bitmap_text_start (weak_ptr<Piece> wp, ContentBitmapCaption subtitle)
844 shared_ptr<Piece> piece = wp.lock ();
849 /* Apply content's subtitle offsets */
850 subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
851 subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
853 /* Apply a corrective translation to keep the subtitle centred after the scale that is coming up */
854 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * ((piece->content->subtitle->x_scale() - 1) / 2);
855 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * ((piece->content->subtitle->y_scale() - 1) / 2);
857 /* Apply content's subtitle scale */
858 subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
859 subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
862 ps.image.push_back (subtitle.sub);
863 DCPTime from (content_time_to_dcp (piece, subtitle.from()));
865 _active_text[subtitle.type()].add_from (wp, ps, from);
869 Player::plain_text_start (weak_ptr<Piece> wp, ContentTextCaption subtitle)
871 shared_ptr<Piece> piece = wp.lock ();
877 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
879 if (from > piece->content->end()) {
883 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
884 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
885 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
886 float const xs = piece->content->subtitle->x_scale();
887 float const ys = piece->content->subtitle->y_scale();
888 float size = s.size();
890 /* Adjust size to express the common part of the scaling;
891 e.g. if xs = ys = 0.5 we scale size by 2.
893 if (xs > 1e-5 && ys > 1e-5) {
894 size *= 1 / min (1 / xs, 1 / ys);
898 /* Then express aspect ratio changes */
899 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
900 s.set_aspect_adjust (xs / ys);
903 s.set_in (dcp::Time(from.seconds(), 1000));
904 ps.text.push_back (TextCaption (s, piece->content->subtitle->outline_width()));
905 ps.add_fonts (piece->content->subtitle->fonts ());
908 _active_text[subtitle.type()].add_from (wp, ps, from);
912 Player::subtitle_stop (weak_ptr<Piece> wp, ContentTime to, TextType type)
914 if (!_active_text[type].have (wp)) {
918 shared_ptr<Piece> piece = wp.lock ();
923 DCPTime const dcp_to = content_time_to_dcp (piece, to);
925 if (dcp_to > piece->content->end()) {
929 pair<PlayerCaption, DCPTime> from = _active_text[type].add_to (wp, dcp_to);
931 if (piece->content->subtitle->use() && !_always_burn_subtitles && !piece->content->subtitle->burn()) {
932 Text (from.first, type, DCPTimePeriod (from.second, dcp_to));
937 Player::seek (DCPTime time, bool accurate)
939 if (!_have_valid_pieces) {
949 if (_audio_processor) {
950 _audio_processor->flush ();
953 _audio_merger.clear ();
954 for (int i = 0; i < TEXT_COUNT; ++i) {
955 _active_text[i].clear ();
958 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
959 if (time < i->content->position()) {
960 /* Before; seek to the start of the content */
961 i->decoder->seek (dcp_to_content_time (i, i->content->position()), accurate);
963 } else if (i->content->position() <= time && time < i->content->end()) {
964 /* During; seek to position */
965 i->decoder->seek (dcp_to_content_time (i, time), accurate);
968 /* After; this piece is done */
974 _last_video_time = time;
975 _last_video_eyes = EYES_LEFT;
976 _last_audio_time = time;
978 _last_video_time = optional<DCPTime>();
979 _last_video_eyes = optional<Eyes>();
980 _last_audio_time = optional<DCPTime>();
983 _black.set_position (time);
984 _silent.set_position (time);
986 _last_video.clear ();
990 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
992 /* We need a delay to give a little wiggle room to ensure that relevent subtitles arrive at the
993 player before the video that requires them.
995 _delay.push_back (make_pair (pv, time));
997 if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
998 _last_video_time = time + one_video_frame();
1000 _last_video_eyes = increment_eyes (pv->eyes());
1002 if (_delay.size() < 3) {
1006 pair<shared_ptr<PlayerVideo>, DCPTime> to_do = _delay.front();
1008 do_emit_video (to_do.first, to_do.second);
1012 Player::do_emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1014 if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
1015 for (int i = 0; i < TEXT_COUNT; ++i) {
1016 _active_text[i].clear_before (time);
1020 optional<PositionImage> subtitles = subtitles_for_frame (time);
1022 pv->set_subtitle (subtitles.get ());
1029 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1031 /* Log if the assert below is about to fail */
1032 if (_last_audio_time && time != *_last_audio_time) {
1033 _film->log()->log(String::compose("Out-of-sequence emit %1 vs %2", to_string(time), to_string(*_last_audio_time)), LogEntry::TYPE_WARNING);
1036 /* This audio must follow on from the previous */
1037 DCPOMATIC_ASSERT (!_last_audio_time || time == *_last_audio_time);
1039 _last_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate());
1043 Player::fill_audio (DCPTimePeriod period)
1045 if (period.from == period.to) {
1049 DCPOMATIC_ASSERT (period.from < period.to);
1051 DCPTime t = period.from;
1052 while (t < period.to) {
1053 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
1054 Frame const samples = block.frames_round(_film->audio_frame_rate());
1056 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
1057 silence->make_silent ();
1058 emit_audio (silence, t);
1065 Player::one_video_frame () const
1067 return DCPTime::from_frames (1, _film->video_frame_rate ());
1070 pair<shared_ptr<AudioBuffers>, DCPTime>
1071 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1073 DCPTime const discard_time = discard_to - time;
1074 Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1075 Frame remaining_frames = audio->frames() - discard_frames;
1076 if (remaining_frames <= 0) {
1077 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1079 shared_ptr<AudioBuffers> cut (new AudioBuffers (audio->channels(), remaining_frames));
1080 cut->copy_from (audio.get(), remaining_frames, discard_frames, 0);
1081 return make_pair(cut, time + discard_time);
1085 Player::set_dcp_decode_reduction (optional<int> reduction)
1087 if (reduction == _dcp_decode_reduction) {
1091 _dcp_decode_reduction = reduction;
1092 _have_valid_pieces = false;
1093 Changed (PlayerProperty::DCP_DECODE_REDUCTION, false);
1097 Player::content_time_to_dcp (shared_ptr<Content> content, ContentTime t)
1099 if (_have_valid_pieces) {
1103 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
1104 if (i->content == content) {
1105 return content_time_to_dcp (i, t);
1109 DCPOMATIC_ASSERT (false);