2 Copyright (C) 2013-2017 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"
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 Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist)
82 , _playlist (playlist)
83 , _have_valid_pieces (false)
84 , _ignore_video (false)
85 , _ignore_subtitle (false)
86 , _always_burn_subtitles (false)
88 , _play_referenced (false)
89 , _audio_merger (_film->audio_frame_rate())
91 _film_changed_connection = _film->Changed.connect (bind (&Player::film_changed, this, _1));
92 _playlist_changed_connection = _playlist->Changed.connect (bind (&Player::playlist_changed, this));
93 _playlist_content_changed_connection = _playlist->ContentChanged.connect (bind (&Player::playlist_content_changed, this, _1, _2, _3));
94 set_video_container_size (_film->frame_size ());
96 film_changed (Film::AUDIO_PROCESSOR);
98 seek (DCPTime (), true);
102 Player::setup_pieces ()
106 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
108 if (!i->paths_valid ()) {
112 shared_ptr<Decoder> decoder = decoder_factory (i, _film->log(), _fast);
113 FrameRateChange frc (i->active_video_frame_rate(), _film->video_frame_rate());
116 /* Not something that we can decode; e.g. Atmos content */
120 if (decoder->video && _ignore_video) {
121 decoder->video->set_ignore ();
124 if (decoder->subtitle && _ignore_subtitle) {
125 decoder->subtitle->set_ignore ();
128 shared_ptr<DCPDecoder> dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
129 if (dcp && _play_referenced) {
130 if (_play_referenced) {
131 dcp->set_decode_referenced ();
133 dcp->set_forced_reduction (_dcp_decode_reduction);
136 shared_ptr<Piece> piece (new Piece (i, decoder, frc));
137 _pieces.push_back (piece);
139 if (decoder->video) {
140 decoder->video->Data.connect (bind (&Player::video, this, weak_ptr<Piece> (piece), _1));
143 if (decoder->audio) {
144 decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
147 if (decoder->subtitle) {
148 decoder->subtitle->ImageStart.connect (bind (&Player::image_subtitle_start, this, weak_ptr<Piece> (piece), _1));
149 decoder->subtitle->TextStart.connect (bind (&Player::text_subtitle_start, this, weak_ptr<Piece> (piece), _1));
150 decoder->subtitle->Stop.connect (bind (&Player::subtitle_stop, this, weak_ptr<Piece> (piece), _1));
154 _stream_states.clear ();
155 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
156 if (i->content->audio) {
157 BOOST_FOREACH (AudioStreamPtr j, i->content->audio->streams()) {
158 _stream_states[j] = StreamState (i, i->content->position ());
163 _black = Empty (_film->content(), _film->length(), bind(&Content::video, _1));
164 _silent = Empty (_film->content(), _film->length(), bind(&Content::audio, _1));
166 _last_video_time = DCPTime ();
167 _last_audio_time = DCPTime ();
168 _have_valid_pieces = true;
172 Player::playlist_content_changed (weak_ptr<Content> w, int property, bool frequent)
174 shared_ptr<Content> c = w.lock ();
180 property == ContentProperty::POSITION ||
181 property == ContentProperty::LENGTH ||
182 property == ContentProperty::TRIM_START ||
183 property == ContentProperty::TRIM_END ||
184 property == ContentProperty::PATH ||
185 property == VideoContentProperty::FRAME_TYPE ||
186 property == DCPContentProperty::NEEDS_ASSETS ||
187 property == DCPContentProperty::NEEDS_KDM ||
188 property == SubtitleContentProperty::COLOUR ||
189 property == SubtitleContentProperty::OUTLINE ||
190 property == SubtitleContentProperty::SHADOW ||
191 property == SubtitleContentProperty::EFFECT_COLOUR ||
192 property == FFmpegContentProperty::SUBTITLE_STREAM ||
193 property == VideoContentProperty::COLOUR_CONVERSION
196 _have_valid_pieces = false;
200 property == SubtitleContentProperty::LINE_SPACING ||
201 property == SubtitleContentProperty::OUTLINE_WIDTH ||
202 property == SubtitleContentProperty::Y_SCALE ||
203 property == SubtitleContentProperty::FADE_IN ||
204 property == SubtitleContentProperty::FADE_OUT ||
205 property == ContentProperty::VIDEO_FRAME_RATE ||
206 property == SubtitleContentProperty::USE ||
207 property == SubtitleContentProperty::X_OFFSET ||
208 property == SubtitleContentProperty::Y_OFFSET ||
209 property == SubtitleContentProperty::X_SCALE ||
210 property == SubtitleContentProperty::FONTS ||
211 property == VideoContentProperty::CROP ||
212 property == VideoContentProperty::SCALE ||
213 property == VideoContentProperty::FADE_IN ||
214 property == VideoContentProperty::FADE_OUT
222 Player::set_video_container_size (dcp::Size s)
224 if (s == _video_container_size) {
228 _video_container_size = s;
230 _black_image.reset (new Image (AV_PIX_FMT_RGB24, _video_container_size, true));
231 _black_image->make_black ();
237 Player::playlist_changed ()
239 _have_valid_pieces = false;
244 Player::film_changed (Film::Property p)
246 /* Here we should notice Film properties that affect our output, and
247 alert listeners that our output now would be different to how it was
248 last time we were run.
251 if (p == Film::CONTAINER) {
253 } else if (p == Film::VIDEO_FRAME_RATE) {
254 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
255 so we need new pieces here.
257 _have_valid_pieces = false;
259 } else if (p == Film::AUDIO_PROCESSOR) {
260 if (_film->audio_processor ()) {
261 _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
267 Player::transform_image_subtitles (list<ImageSubtitle> subs) const
269 list<PositionImage> all;
271 for (list<ImageSubtitle>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
276 /* We will scale the subtitle up to fit _video_container_size */
277 dcp::Size scaled_size (i->rectangle.width * _video_container_size.width, i->rectangle.height * _video_container_size.height);
279 /* Then we need a corrective translation, consisting of two parts:
281 * 1. that which is the result of the scaling of the subtitle by _video_container_size; this will be
282 * rect.x * _video_container_size.width and rect.y * _video_container_size.height.
284 * 2. that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
285 * (width_before_subtitle_scale * (1 - subtitle_x_scale) / 2) and
286 * (height_before_subtitle_scale * (1 - subtitle_y_scale) / 2).
288 * Combining these two translations gives these expressions.
295 dcp::YUV_TO_RGB_REC601,
296 i->image->pixel_format (),
301 lrint (_video_container_size.width * i->rectangle.x),
302 lrint (_video_container_size.height * i->rectangle.y)
311 shared_ptr<PlayerVideo>
312 Player::black_player_video_frame () const
314 return shared_ptr<PlayerVideo> (
316 shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
319 _video_container_size,
320 _video_container_size,
323 PresetColourConversion::all().front().conversion
329 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
331 DCPTime s = t - piece->content->position ();
332 s = min (piece->content->length_after_trim(), s);
333 s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
335 /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
336 then convert that ContentTime to frames at the content's rate. However this fails for
337 situations like content at 29.9978733fps, DCP at 30fps. The accuracy of the Time type is not
338 enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
340 Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
342 return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
346 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
348 /* See comment in dcp_to_content_video */
349 DCPTime const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime(piece->content->trim_start(), piece->frc);
350 return d + piece->content->position();
354 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
356 DCPTime s = t - piece->content->position ();
357 s = min (piece->content->length_after_trim(), s);
358 /* See notes in dcp_to_content_video */
359 return max (DCPTime (), DCPTime (piece->content->trim_start (), piece->frc) + s).frames_floor (_film->audio_frame_rate ());
363 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
365 /* See comment in dcp_to_content_video */
366 return DCPTime::from_frames (f, _film->audio_frame_rate())
367 - DCPTime (piece->content->trim_start(), piece->frc)
368 + piece->content->position();
372 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
374 DCPTime s = t - piece->content->position ();
375 s = min (piece->content->length_after_trim(), s);
376 return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
380 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
382 return max (DCPTime (), DCPTime (t - piece->content->trim_start(), piece->frc) + piece->content->position());
385 list<shared_ptr<Font> >
386 Player::get_subtitle_fonts ()
388 if (!_have_valid_pieces) {
392 list<shared_ptr<Font> > fonts;
393 BOOST_FOREACH (shared_ptr<Piece>& p, _pieces) {
394 if (p->content->subtitle) {
395 /* XXX: things may go wrong if there are duplicate font IDs
396 with different font files.
398 list<shared_ptr<Font> > f = p->content->subtitle->fonts ();
399 copy (f.begin(), f.end(), back_inserter (fonts));
406 /** Set this player never to produce any video data */
408 Player::set_ignore_video ()
410 _ignore_video = true;
414 Player::set_ignore_subtitle ()
416 _ignore_subtitle = true;
419 /** Set whether or not this player should always burn text subtitles into the image,
420 * regardless of the content settings.
421 * @param burn true to always burn subtitles, false to obey content settings.
424 Player::set_always_burn_subtitles (bool burn)
426 _always_burn_subtitles = burn;
429 /** Sets up the player to be faster, possibly at the expense of quality */
434 _have_valid_pieces = false;
438 Player::set_play_referenced ()
440 _play_referenced = true;
441 _have_valid_pieces = false;
444 list<ReferencedReelAsset>
445 Player::get_reel_assets ()
447 list<ReferencedReelAsset> a;
449 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
450 shared_ptr<DCPContent> j = dynamic_pointer_cast<DCPContent> (i);
455 scoped_ptr<DCPDecoder> decoder;
457 decoder.reset (new DCPDecoder (j, _film->log(), false));
463 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
465 DCPOMATIC_ASSERT (j->video_frame_rate ());
466 double const cfr = j->video_frame_rate().get();
467 Frame const trim_start = j->trim_start().frames_round (cfr);
468 Frame const trim_end = j->trim_end().frames_round (cfr);
469 int const ffr = _film->video_frame_rate ();
471 DCPTime const from = i->position() + DCPTime::from_frames (offset, _film->video_frame_rate());
472 if (j->reference_video ()) {
473 shared_ptr<dcp::ReelAsset> ra = k->main_picture ();
474 DCPOMATIC_ASSERT (ra);
475 ra->set_entry_point (ra->entry_point() + trim_start);
476 ra->set_duration (ra->duration() - trim_start - trim_end);
478 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
482 if (j->reference_audio ()) {
483 shared_ptr<dcp::ReelAsset> ra = k->main_sound ();
484 DCPOMATIC_ASSERT (ra);
485 ra->set_entry_point (ra->entry_point() + trim_start);
486 ra->set_duration (ra->duration() - trim_start - trim_end);
488 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
492 if (j->reference_subtitle ()) {
493 shared_ptr<dcp::ReelAsset> ra = k->main_subtitle ();
494 DCPOMATIC_ASSERT (ra);
495 ra->set_entry_point (ra->entry_point() + trim_start);
496 ra->set_duration (ra->duration() - trim_start - trim_end);
498 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
502 /* Assume that main picture duration is the length of the reel */
503 offset += k->main_picture()->duration ();
513 if (!_have_valid_pieces) {
517 if (_playlist->length() == DCPTime()) {
518 /* Special case of an empty Film; just give one black frame */
519 emit_video (black_player_video_frame(), DCPTime());
523 /* Find the decoder or empty which is farthest behind where we are and make it emit some data */
525 shared_ptr<Piece> earliest_content;
526 optional<DCPTime> earliest_time;
528 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
530 DCPTime const t = content_time_to_dcp (i, i->decoder->position());
531 /* Given two choices at the same time, pick the one with a subtitle so we see it before
534 if (!earliest_time || t < *earliest_time || (t == *earliest_time && i->decoder->subtitle)) {
536 earliest_content = i;
550 if (earliest_content) {
554 if (!_black.done() && (!earliest_time || _black.position() < *earliest_time)) {
555 earliest_time = _black.position ();
559 if (!_silent.done() && (!earliest_time || _silent.position() < *earliest_time)) {
560 earliest_time = _silent.position ();
566 earliest_content->done = earliest_content->decoder->pass ();
569 emit_video (black_player_video_frame(), _black.position());
570 _black.set_position (_black.position() + one_video_frame());
574 DCPTimePeriod period (_silent.period_at_position());
575 if (period.duration() > one_video_frame()) {
576 period.to = period.from + one_video_frame();
579 _silent.set_position (period.to);
587 /* Emit any audio that is ready */
589 DCPTime pull_to = _film->length ();
590 for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
591 if (!i->second.piece->done && i->second.last_push_end < pull_to) {
592 pull_to = i->second.last_push_end;
596 list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_to);
597 for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
598 if (_last_audio_time && i->second < *_last_audio_time) {
599 /* This new data comes before the last we emitted (or the last seek); discard it */
600 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
605 } else if (_last_audio_time && i->second > *_last_audio_time) {
606 /* There's a gap between this data and the last we emitted; fill with silence */
607 fill_audio (DCPTimePeriod (*_last_audio_time, i->second));
610 emit_audio (i->first, i->second);
616 optional<PositionImage>
617 Player::subtitles_for_frame (DCPTime time) const
619 list<PositionImage> subtitles;
621 BOOST_FOREACH (PlayerSubtitles i, _active_subtitles.get_burnt (time, _always_burn_subtitles)) {
623 /* Image subtitles */
624 list<PositionImage> c = transform_image_subtitles (i.image);
625 copy (c.begin(), c.end(), back_inserter (subtitles));
627 /* Text subtitles (rendered to an image) */
628 if (!i.text.empty ()) {
629 list<PositionImage> s = render_subtitles (i.text, i.fonts, _video_container_size, time);
630 copy (s.begin(), s.end(), back_inserter (subtitles));
634 if (subtitles.empty ()) {
635 return optional<PositionImage> ();
638 return merge (subtitles);
642 Player::video (weak_ptr<Piece> wp, ContentVideo video)
644 shared_ptr<Piece> piece = wp.lock ();
649 FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
650 if (frc.skip && (video.frame % 2) == 1) {
654 /* Time of the first frame we will emit */
655 DCPTime const time = content_video_to_dcp (piece, video.frame);
657 /* Discard if it's outside the content's period or if it's before the last accurate seek */
659 time < piece->content->position() ||
660 time >= piece->content->end() ||
661 (_last_video_time && time < *_last_video_time)) {
665 /* Fill gaps that we discover now that we have some video which needs to be emitted */
667 if (_last_video_time) {
668 /* XXX: this may not work for 3D */
669 DCPTime fill_from = max (*_last_video_time, piece->content->position());
670 for (DCPTime j = fill_from; j < time; j += one_video_frame()) {
671 LastVideoMap::const_iterator k = _last_video.find (wp);
672 if (k != _last_video.end ()) {
673 emit_video (k->second, j);
675 emit_video (black_player_video_frame(), j);
680 _last_video[wp].reset (
683 piece->content->video->crop (),
684 piece->content->video->fade (video.frame),
685 piece->content->video->scale().size (
686 piece->content->video, _video_container_size, _film->frame_size ()
688 _video_container_size,
691 piece->content->video->colour_conversion ()
696 for (int i = 0; i < frc.repeat; ++i) {
697 emit_video (_last_video[wp], t);
698 t += one_video_frame ();
703 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
705 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
707 shared_ptr<Piece> piece = wp.lock ();
712 shared_ptr<AudioContent> content = piece->content->audio;
713 DCPOMATIC_ASSERT (content);
715 /* Compute time in the DCP */
716 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame);
717 /* And the end of this block in the DCP */
718 DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate());
720 /* Remove anything that comes before the start or after the end of the content */
721 if (time < piece->content->position()) {
722 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
724 /* This audio is entirely discarded */
727 content_audio.audio = cut.first;
729 } else if (time > piece->content->end()) {
732 } else if (end > piece->content->end()) {
733 Frame const remaining_frames = DCPTime(piece->content->end() - time).frames_round(_film->audio_frame_rate());
734 if (remaining_frames == 0) {
737 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
738 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
739 content_audio.audio = cut;
742 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
746 if (content->gain() != 0) {
747 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
748 gain->apply_gain (content->gain ());
749 content_audio.audio = gain;
754 content_audio.audio = remap (content_audio.audio, _film->audio_channels(), stream->mapping());
758 if (_audio_processor) {
759 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
764 _audio_merger.push (content_audio.audio, time);
765 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
766 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
770 Player::image_subtitle_start (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
772 shared_ptr<Piece> piece = wp.lock ();
777 /* Apply content's subtitle offsets */
778 subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
779 subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
781 /* Apply content's subtitle scale */
782 subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
783 subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
785 /* Apply a corrective translation to keep the subtitle centred after that scale */
786 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * (piece->content->subtitle->x_scale() - 1);
787 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * (piece->content->subtitle->y_scale() - 1);
790 ps.image.push_back (subtitle.sub);
791 DCPTime from (content_time_to_dcp (piece, subtitle.from()));
793 _active_subtitles.add_from (wp, ps, from);
797 Player::text_subtitle_start (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
799 shared_ptr<Piece> piece = wp.lock ();
805 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
807 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
808 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
809 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
810 float const xs = piece->content->subtitle->x_scale();
811 float const ys = piece->content->subtitle->y_scale();
812 float size = s.size();
814 /* Adjust size to express the common part of the scaling;
815 e.g. if xs = ys = 0.5 we scale size by 2.
817 if (xs > 1e-5 && ys > 1e-5) {
818 size *= 1 / min (1 / xs, 1 / ys);
822 /* Then express aspect ratio changes */
823 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
824 s.set_aspect_adjust (xs / ys);
827 s.set_in (dcp::Time(from.seconds(), 1000));
828 ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
829 ps.add_fonts (piece->content->subtitle->fonts ());
832 _active_subtitles.add_from (wp, ps, from);
836 Player::subtitle_stop (weak_ptr<Piece> wp, ContentTime to)
838 if (!_active_subtitles.have (wp)) {
842 shared_ptr<Piece> piece = wp.lock ();
847 DCPTime const dcp_to = content_time_to_dcp (piece, to);
849 pair<PlayerSubtitles, DCPTime> from = _active_subtitles.add_to (wp, dcp_to);
851 if (piece->content->subtitle->use() && !_always_burn_subtitles && !piece->content->subtitle->burn()) {
852 Subtitle (from.first, DCPTimePeriod (from.second, dcp_to));
857 Player::seek (DCPTime time, bool accurate)
859 if (!_have_valid_pieces) {
863 if (_audio_processor) {
864 _audio_processor->flush ();
867 _audio_merger.clear ();
868 _active_subtitles.clear ();
870 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
871 if (time < i->content->position()) {
872 /* Before; seek to 0 */
873 i->decoder->seek (ContentTime(), accurate);
875 } else if (i->content->position() <= time && time < i->content->end()) {
876 /* During; seek to position */
877 i->decoder->seek (dcp_to_content_time (i, time), accurate);
880 /* After; this piece is done */
886 _last_video_time = time;
887 _last_audio_time = time;
889 _last_video_time = optional<DCPTime>();
890 _last_audio_time = optional<DCPTime>();
893 _black.set_position (time);
894 _silent.set_position (time);
896 _last_video.clear ();
900 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
902 optional<PositionImage> subtitles = subtitles_for_frame (time);
904 pv->set_subtitle (subtitles.get ());
909 if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
910 _last_video_time = time + one_video_frame();
911 _active_subtitles.clear_before (time);
916 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
919 _last_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate());
923 Player::fill_audio (DCPTimePeriod period)
925 if (period.from == period.to) {
929 DCPOMATIC_ASSERT (period.from < period.to);
931 DCPTime t = period.from;
932 while (t < period.to) {
933 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
934 Frame const samples = block.frames_round(_film->audio_frame_rate());
936 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
937 silence->make_silent ();
938 emit_audio (silence, t);
945 Player::one_video_frame () const
947 return DCPTime::from_frames (1, _film->video_frame_rate ());
950 pair<shared_ptr<AudioBuffers>, DCPTime>
951 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
953 DCPTime const discard_time = discard_to - time;
954 Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
955 Frame remaining_frames = audio->frames() - discard_frames;
956 if (remaining_frames <= 0) {
957 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
959 shared_ptr<AudioBuffers> cut (new AudioBuffers (audio->channels(), remaining_frames));
960 cut->copy_from (audio.get(), remaining_frames, discard_frames, 0);
961 return make_pair(cut, time + discard_time);
965 Player::set_dcp_decode_reduction (optional<int> reduction)
967 if (reduction == _dcp_decode_reduction) {
971 _dcp_decode_reduction = reduction;
972 _have_valid_pieces = false;