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_subtitles.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 "subtitle_content.h"
44 #include "subtitle_decoder.h"
45 #include "ffmpeg_content.h"
46 #include "audio_content.h"
47 #include "content_subtitle.h"
48 #include "dcp_decoder.h"
49 #include "image_decoder.h"
50 #include "compose.hpp"
53 #include <dcp/reel_sound_asset.h>
54 #include <dcp/reel_subtitle_asset.h>
55 #include <dcp/reel_picture_asset.h>
56 #include <boost/foreach.hpp>
63 #define LOG_GENERAL(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
75 using boost::shared_ptr;
76 using boost::weak_ptr;
77 using boost::dynamic_pointer_cast;
78 using boost::optional;
79 using boost::scoped_ptr;
81 Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist)
83 , _playlist (playlist)
84 , _have_valid_pieces (false)
85 , _ignore_video (false)
86 , _ignore_subtitle (false)
87 , _always_burn_subtitles (false)
89 , _play_referenced (false)
90 , _audio_merger (_film->audio_frame_rate())
93 _film_changed_connection = _film->Changed.connect (bind (&Player::film_changed, this, _1));
94 _playlist_changed_connection = _playlist->Changed.connect (bind (&Player::playlist_changed, this));
95 _playlist_content_changed_connection = _playlist->ContentChanged.connect (bind (&Player::playlist_content_changed, this, _1, _2, _3));
96 set_video_container_size (_film->frame_size ());
98 film_changed (Film::AUDIO_PROCESSOR);
100 seek (DCPTime (), true);
109 Player::setup_pieces ()
114 _shuffler = new Shuffler();
115 _shuffler->Video.connect(bind(&Player::video, this, _1, _2));
117 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
119 if (!i->paths_valid ()) {
123 shared_ptr<Decoder> decoder = decoder_factory (i, _film->log(), _fast);
124 FrameRateChange frc (i->active_video_frame_rate(), _film->video_frame_rate());
127 /* Not something that we can decode; e.g. Atmos content */
131 if (decoder->video && _ignore_video) {
132 decoder->video->set_ignore ();
135 if (decoder->subtitle && _ignore_subtitle) {
136 decoder->subtitle->set_ignore ();
139 shared_ptr<DCPDecoder> dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
140 if (dcp && _play_referenced) {
141 if (_play_referenced) {
142 dcp->set_decode_referenced ();
144 dcp->set_forced_reduction (_dcp_decode_reduction);
147 shared_ptr<Piece> piece (new Piece (i, decoder, frc));
148 _pieces.push_back (piece);
150 if (decoder->video) {
151 if (i->video->frame_type() == VIDEO_FRAME_TYPE_3D_LEFT || i->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
152 decoder->video->Data.connect (bind (&Shuffler::video, _shuffler, weak_ptr<Piece>(piece), _1));
154 decoder->video->Data.connect (bind (&Player::video, this, weak_ptr<Piece>(piece), _1));
158 if (decoder->audio) {
159 decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
162 if (decoder->subtitle) {
163 decoder->subtitle->ImageStart.connect (bind (&Player::image_subtitle_start, this, weak_ptr<Piece> (piece), _1));
164 decoder->subtitle->TextStart.connect (bind (&Player::text_subtitle_start, this, weak_ptr<Piece> (piece), _1));
165 decoder->subtitle->Stop.connect (bind (&Player::subtitle_stop, this, weak_ptr<Piece> (piece), _1));
169 _stream_states.clear ();
170 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
171 if (i->content->audio) {
172 BOOST_FOREACH (AudioStreamPtr j, i->content->audio->streams()) {
173 _stream_states[j] = StreamState (i, i->content->position ());
178 _black = Empty (_film->content(), _film->length(), bind(&Content::video, _1));
179 _silent = Empty (_film->content(), _film->length(), bind(&Content::audio, _1));
181 _last_video_time = DCPTime ();
182 _last_video_eyes = EYES_BOTH;
183 _last_audio_time = DCPTime ();
184 _have_valid_pieces = true;
188 Player::playlist_content_changed (weak_ptr<Content> w, int property, bool frequent)
190 shared_ptr<Content> c = w.lock ();
196 property == ContentProperty::POSITION ||
197 property == ContentProperty::LENGTH ||
198 property == ContentProperty::TRIM_START ||
199 property == ContentProperty::TRIM_END ||
200 property == ContentProperty::PATH ||
201 property == VideoContentProperty::FRAME_TYPE ||
202 property == DCPContentProperty::NEEDS_ASSETS ||
203 property == DCPContentProperty::NEEDS_KDM ||
204 property == SubtitleContentProperty::COLOUR ||
205 property == SubtitleContentProperty::EFFECT ||
206 property == SubtitleContentProperty::EFFECT_COLOUR ||
207 property == FFmpegContentProperty::SUBTITLE_STREAM ||
208 property == FFmpegContentProperty::FILTERS ||
209 property == VideoContentProperty::COLOUR_CONVERSION
212 _have_valid_pieces = false;
216 property == SubtitleContentProperty::LINE_SPACING ||
217 property == SubtitleContentProperty::OUTLINE_WIDTH ||
218 property == SubtitleContentProperty::Y_SCALE ||
219 property == SubtitleContentProperty::FADE_IN ||
220 property == SubtitleContentProperty::FADE_OUT ||
221 property == ContentProperty::VIDEO_FRAME_RATE ||
222 property == SubtitleContentProperty::USE ||
223 property == SubtitleContentProperty::X_OFFSET ||
224 property == SubtitleContentProperty::Y_OFFSET ||
225 property == SubtitleContentProperty::X_SCALE ||
226 property == SubtitleContentProperty::FONTS ||
227 property == VideoContentProperty::CROP ||
228 property == VideoContentProperty::SCALE ||
229 property == VideoContentProperty::FADE_IN ||
230 property == VideoContentProperty::FADE_OUT
238 Player::set_video_container_size (dcp::Size s)
240 if (s == _video_container_size) {
244 _video_container_size = s;
246 _black_image.reset (new Image (AV_PIX_FMT_RGB24, _video_container_size, true));
247 _black_image->make_black ();
253 Player::playlist_changed ()
255 _have_valid_pieces = false;
260 Player::film_changed (Film::Property p)
262 /* Here we should notice Film properties that affect our output, and
263 alert listeners that our output now would be different to how it was
264 last time we were run.
267 if (p == Film::CONTAINER) {
269 } else if (p == Film::VIDEO_FRAME_RATE) {
270 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
271 so we need new pieces here.
273 _have_valid_pieces = false;
275 } else if (p == Film::AUDIO_PROCESSOR) {
276 if (_film->audio_processor ()) {
277 _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
283 Player::transform_image_subtitles (list<ImageSubtitle> subs) const
285 list<PositionImage> all;
287 for (list<ImageSubtitle>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
292 /* We will scale the subtitle up to fit _video_container_size */
293 dcp::Size scaled_size (i->rectangle.width * _video_container_size.width, i->rectangle.height * _video_container_size.height);
295 /* Then we need a corrective translation, consisting of two parts:
297 * 1. that which is the result of the scaling of the subtitle by _video_container_size; this will be
298 * rect.x * _video_container_size.width and rect.y * _video_container_size.height.
300 * 2. that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
301 * (width_before_subtitle_scale * (1 - subtitle_x_scale) / 2) and
302 * (height_before_subtitle_scale * (1 - subtitle_y_scale) / 2).
304 * Combining these two translations gives these expressions.
311 dcp::YUV_TO_RGB_REC601,
312 i->image->pixel_format (),
317 lrint (_video_container_size.width * i->rectangle.x),
318 lrint (_video_container_size.height * i->rectangle.y)
327 shared_ptr<PlayerVideo>
328 Player::black_player_video_frame (Eyes eyes) const
330 return shared_ptr<PlayerVideo> (
332 shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
335 _video_container_size,
336 _video_container_size,
339 PresetColourConversion::all().front().conversion
345 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
347 DCPTime s = t - piece->content->position ();
348 s = min (piece->content->length_after_trim(), s);
349 s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
351 /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
352 then convert that ContentTime to frames at the content's rate. However this fails for
353 situations like content at 29.9978733fps, DCP at 30fps. The accuracy of the Time type is not
354 enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
356 Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
358 return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
362 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
364 /* See comment in dcp_to_content_video */
365 DCPTime const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime(piece->content->trim_start(), piece->frc);
366 return d + piece->content->position();
370 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
372 DCPTime s = t - piece->content->position ();
373 s = min (piece->content->length_after_trim(), s);
374 /* See notes in dcp_to_content_video */
375 return max (DCPTime (), DCPTime (piece->content->trim_start (), piece->frc) + s).frames_floor (_film->audio_frame_rate ());
379 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
381 /* See comment in dcp_to_content_video */
382 return DCPTime::from_frames (f, _film->audio_frame_rate())
383 - DCPTime (piece->content->trim_start(), piece->frc)
384 + piece->content->position();
388 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
390 DCPTime s = t - piece->content->position ();
391 s = min (piece->content->length_after_trim(), s);
392 return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
396 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
398 return max (DCPTime (), DCPTime (t - piece->content->trim_start(), piece->frc) + piece->content->position());
401 list<shared_ptr<Font> >
402 Player::get_subtitle_fonts ()
404 if (!_have_valid_pieces) {
408 list<shared_ptr<Font> > fonts;
409 BOOST_FOREACH (shared_ptr<Piece>& p, _pieces) {
410 if (p->content->subtitle) {
411 /* XXX: things may go wrong if there are duplicate font IDs
412 with different font files.
414 list<shared_ptr<Font> > f = p->content->subtitle->fonts ();
415 copy (f.begin(), f.end(), back_inserter (fonts));
422 /** Set this player never to produce any video data */
424 Player::set_ignore_video ()
426 _ignore_video = true;
430 Player::set_ignore_subtitle ()
432 _ignore_subtitle = true;
435 /** Set whether or not this player should always burn text subtitles into the image,
436 * regardless of the content settings.
437 * @param burn true to always burn subtitles, false to obey content settings.
440 Player::set_always_burn_subtitles (bool burn)
442 _always_burn_subtitles = burn;
445 /** Sets up the player to be faster, possibly at the expense of quality */
450 _have_valid_pieces = false;
454 Player::set_play_referenced ()
456 _play_referenced = true;
457 _have_valid_pieces = false;
460 list<ReferencedReelAsset>
461 Player::get_reel_assets ()
463 list<ReferencedReelAsset> a;
465 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
466 shared_ptr<DCPContent> j = dynamic_pointer_cast<DCPContent> (i);
471 scoped_ptr<DCPDecoder> decoder;
473 decoder.reset (new DCPDecoder (j, _film->log(), false));
479 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
481 DCPOMATIC_ASSERT (j->video_frame_rate ());
482 double const cfr = j->video_frame_rate().get();
483 Frame const trim_start = j->trim_start().frames_round (cfr);
484 Frame const trim_end = j->trim_end().frames_round (cfr);
485 int const ffr = _film->video_frame_rate ();
487 DCPTime const from = i->position() + DCPTime::from_frames (offset, _film->video_frame_rate());
488 if (j->reference_video ()) {
489 shared_ptr<dcp::ReelAsset> ra = k->main_picture ();
490 DCPOMATIC_ASSERT (ra);
491 ra->set_entry_point (ra->entry_point() + trim_start);
492 ra->set_duration (ra->duration() - trim_start - trim_end);
494 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
498 if (j->reference_audio ()) {
499 shared_ptr<dcp::ReelAsset> ra = k->main_sound ();
500 DCPOMATIC_ASSERT (ra);
501 ra->set_entry_point (ra->entry_point() + trim_start);
502 ra->set_duration (ra->duration() - trim_start - trim_end);
504 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
508 if (j->reference_subtitle ()) {
509 shared_ptr<dcp::ReelAsset> ra = k->main_subtitle ();
510 DCPOMATIC_ASSERT (ra);
511 ra->set_entry_point (ra->entry_point() + trim_start);
512 ra->set_duration (ra->duration() - trim_start - trim_end);
514 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
518 /* Assume that main picture duration is the length of the reel */
519 offset += k->main_picture()->duration ();
529 if (!_have_valid_pieces) {
533 if (_playlist->length() == DCPTime()) {
534 /* Special case of an empty Film; just give one black frame */
535 emit_video (black_player_video_frame(EYES_BOTH), DCPTime());
539 /* Find the decoder or empty which is farthest behind where we are and make it emit some data */
541 shared_ptr<Piece> earliest_content;
542 optional<DCPTime> earliest_time;
544 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
549 DCPTime const t = content_time_to_dcp (i, i->decoder->position());
550 if (t > i->content->end()) {
554 /* Given two choices at the same time, pick the one with a subtitle so we see it before
557 if (!earliest_time || t < *earliest_time || (t == *earliest_time && i->decoder->subtitle)) {
559 earliest_content = i;
573 if (earliest_content) {
577 if (!_black.done() && (!earliest_time || _black.position() < *earliest_time)) {
578 earliest_time = _black.position ();
582 if (!_silent.done() && (!earliest_time || _silent.position() < *earliest_time)) {
583 earliest_time = _silent.position ();
589 earliest_content->done = earliest_content->decoder->pass ();
592 emit_video (black_player_video_frame(EYES_BOTH), _black.position());
593 _black.set_position (_black.position() + one_video_frame());
597 DCPTimePeriod period (_silent.period_at_position());
598 if (period.duration() > one_video_frame()) {
599 period.to = period.from + one_video_frame();
602 _silent.set_position (period.to);
610 /* Emit any audio that is ready */
612 /* Work out the time before which the audio is definitely all here. This is the earliest last_push_end of one
613 of our streams, or the position of the _silent.
615 DCPTime pull_to = _film->length ();
616 for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
617 if (!i->second.piece->done && i->second.last_push_end < pull_to) {
618 pull_to = i->second.last_push_end;
621 if (!_silent.done() && _silent.position() < pull_to) {
622 pull_to = _silent.position();
625 list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_to);
626 for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
627 if (_last_audio_time && i->second < *_last_audio_time) {
628 /* This new data comes before the last we emitted (or the last seek); discard it */
629 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
634 } else if (_last_audio_time && i->second > *_last_audio_time) {
635 /* There's a gap between this data and the last we emitted; fill with silence */
636 fill_audio (DCPTimePeriod (*_last_audio_time, i->second));
639 emit_audio (i->first, i->second);
648 optional<PositionImage>
649 Player::subtitles_for_frame (DCPTime time) const
651 list<PositionImage> subtitles;
653 BOOST_FOREACH (PlayerSubtitles i, _active_subtitles.get_burnt (DCPTimePeriod(time, time + DCPTime::from_frames(1, _film->video_frame_rate())), _always_burn_subtitles)) {
655 /* Image subtitles */
656 list<PositionImage> c = transform_image_subtitles (i.image);
657 copy (c.begin(), c.end(), back_inserter (subtitles));
659 /* Text subtitles (rendered to an image) */
660 if (!i.text.empty ()) {
661 list<PositionImage> s = render_subtitles (i.text, i.fonts, _video_container_size, time);
662 copy (s.begin(), s.end(), back_inserter (subtitles));
666 if (subtitles.empty ()) {
667 return optional<PositionImage> ();
670 return merge (subtitles);
674 Player::video (weak_ptr<Piece> wp, ContentVideo video)
676 shared_ptr<Piece> piece = wp.lock ();
681 FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
682 if (frc.skip && (video.frame % 2) == 1) {
686 /* Time of the first frame we will emit */
687 DCPTime const time = content_video_to_dcp (piece, video.frame);
689 /* Discard if it's outside the content's period or if it's before the last accurate seek */
691 time < piece->content->position() ||
692 time >= piece->content->end() ||
693 (_last_video_time && time < *_last_video_time)) {
697 /* Fill gaps that we discover now that we have some video which needs to be emitted */
699 if (_last_video_time) {
700 DCPTime fill_from = max (*_last_video_time, piece->content->position());
701 LastVideoMap::const_iterator last = _last_video.find (wp);
702 if (_film->three_d()) {
703 DCPTime j = fill_from;
704 Eyes eyes = _last_video_eyes.get_value_or(EYES_LEFT);
705 if (eyes == EYES_BOTH) {
708 while (j < time || eyes != video.eyes) {
709 if (last != _last_video.end()) {
710 last->second->set_eyes (eyes);
711 emit_video (last->second, j);
713 emit_video (black_player_video_frame(eyes), j);
715 if (eyes == EYES_RIGHT) {
716 j += one_video_frame();
718 eyes = increment_eyes (eyes);
721 for (DCPTime j = fill_from; j < time; j += one_video_frame()) {
722 if (last != _last_video.end()) {
723 emit_video (last->second, j);
725 emit_video (black_player_video_frame(EYES_BOTH), j);
731 _last_video[wp].reset (
734 piece->content->video->crop (),
735 piece->content->video->fade (video.frame),
736 piece->content->video->scale().size (
737 piece->content->video, _video_container_size, _film->frame_size ()
739 _video_container_size,
742 piece->content->video->colour_conversion ()
747 for (int i = 0; i < frc.repeat; ++i) {
748 emit_video (_last_video[wp], t);
749 t += one_video_frame ();
754 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
756 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
758 shared_ptr<Piece> piece = wp.lock ();
763 shared_ptr<AudioContent> content = piece->content->audio;
764 DCPOMATIC_ASSERT (content);
766 /* Compute time in the DCP */
767 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame);
768 /* And the end of this block in the DCP */
769 DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate());
771 /* Remove anything that comes before the start or after the end of the content */
772 if (time < piece->content->position()) {
773 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
775 /* This audio is entirely discarded */
778 content_audio.audio = cut.first;
780 } else if (time > piece->content->end()) {
783 } else if (end > piece->content->end()) {
784 Frame const remaining_frames = DCPTime(piece->content->end() - time).frames_round(_film->audio_frame_rate());
785 if (remaining_frames == 0) {
788 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
789 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
790 content_audio.audio = cut;
793 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
797 if (content->gain() != 0) {
798 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
799 gain->apply_gain (content->gain ());
800 content_audio.audio = gain;
805 content_audio.audio = remap (content_audio.audio, _film->audio_channels(), stream->mapping());
809 if (_audio_processor) {
810 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
815 _audio_merger.push (content_audio.audio, time);
816 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
817 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
821 Player::image_subtitle_start (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
823 shared_ptr<Piece> piece = wp.lock ();
828 /* Apply content's subtitle offsets */
829 subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
830 subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
832 /* Apply content's subtitle scale */
833 subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
834 subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
836 /* Apply a corrective translation to keep the subtitle centred after that scale */
837 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * (piece->content->subtitle->x_scale() - 1);
838 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * (piece->content->subtitle->y_scale() - 1);
841 ps.image.push_back (subtitle.sub);
842 DCPTime from (content_time_to_dcp (piece, subtitle.from()));
844 _active_subtitles.add_from (wp, ps, from);
848 Player::text_subtitle_start (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
850 shared_ptr<Piece> piece = wp.lock ();
856 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
858 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
859 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
860 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
861 float const xs = piece->content->subtitle->x_scale();
862 float const ys = piece->content->subtitle->y_scale();
863 float size = s.size();
865 /* Adjust size to express the common part of the scaling;
866 e.g. if xs = ys = 0.5 we scale size by 2.
868 if (xs > 1e-5 && ys > 1e-5) {
869 size *= 1 / min (1 / xs, 1 / ys);
873 /* Then express aspect ratio changes */
874 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
875 s.set_aspect_adjust (xs / ys);
878 s.set_in (dcp::Time(from.seconds(), 1000));
879 ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
880 ps.add_fonts (piece->content->subtitle->fonts ());
883 _active_subtitles.add_from (wp, ps, from);
887 Player::subtitle_stop (weak_ptr<Piece> wp, ContentTime to)
889 if (!_active_subtitles.have (wp)) {
893 shared_ptr<Piece> piece = wp.lock ();
898 DCPTime const dcp_to = content_time_to_dcp (piece, to);
900 pair<PlayerSubtitles, DCPTime> from = _active_subtitles.add_to (wp, dcp_to);
902 if (piece->content->subtitle->use() && !_always_burn_subtitles && !piece->content->subtitle->burn()) {
903 Subtitle (from.first, DCPTimePeriod (from.second, dcp_to));
908 Player::seek (DCPTime time, bool accurate)
910 if (!_have_valid_pieces) {
918 if (_audio_processor) {
919 _audio_processor->flush ();
922 _audio_merger.clear ();
923 _active_subtitles.clear ();
925 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
926 if (time < i->content->position()) {
927 /* Before; seek to 0 */
928 i->decoder->seek (ContentTime(), accurate);
930 } else if (i->content->position() <= time && time < i->content->end()) {
931 /* During; seek to position */
932 i->decoder->seek (dcp_to_content_time (i, time), accurate);
935 /* After; this piece is done */
941 _last_video_time = time;
942 _last_video_eyes = EYES_LEFT;
943 _last_audio_time = time;
945 _last_video_time = optional<DCPTime>();
946 _last_video_eyes = optional<Eyes>();
947 _last_audio_time = optional<DCPTime>();
950 _black.set_position (time);
951 _silent.set_position (time);
953 _last_video.clear ();
957 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
959 optional<PositionImage> subtitles = subtitles_for_frame (time);
961 pv->set_subtitle (subtitles.get ());
966 if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
967 _last_video_time = time + one_video_frame();
968 _active_subtitles.clear_before (time);
970 _last_video_eyes = increment_eyes (pv->eyes());
974 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
976 /* This audio must follow on from the previous */
977 DCPOMATIC_ASSERT (!_last_audio_time || time == *_last_audio_time);
979 _last_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate());
983 Player::fill_audio (DCPTimePeriod period)
985 if (period.from == period.to) {
989 DCPOMATIC_ASSERT (period.from < period.to);
991 DCPTime t = period.from;
992 while (t < period.to) {
993 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
994 Frame const samples = block.frames_round(_film->audio_frame_rate());
996 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
997 silence->make_silent ();
998 emit_audio (silence, t);
1005 Player::one_video_frame () const
1007 return DCPTime::from_frames (1, _film->video_frame_rate ());
1010 pair<shared_ptr<AudioBuffers>, DCPTime>
1011 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1013 DCPTime const discard_time = discard_to - time;
1014 Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1015 Frame remaining_frames = audio->frames() - discard_frames;
1016 if (remaining_frames <= 0) {
1017 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1019 shared_ptr<AudioBuffers> cut (new AudioBuffers (audio->channels(), remaining_frames));
1020 cut->copy_from (audio.get(), remaining_frames, discard_frames, 0);
1021 return make_pair(cut, time + discard_time);
1025 Player::set_dcp_decode_reduction (optional<int> reduction)
1027 if (reduction == _dcp_decode_reduction) {
1031 _dcp_decode_reduction = reduction;
1032 _have_valid_pieces = false;