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_audio (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());
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->audio && _ignore_audio) {
125 decoder->audio->set_ignore ();
128 shared_ptr<DCPDecoder> dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
129 if (dcp && _play_referenced) {
130 dcp->set_decode_referenced ();
133 shared_ptr<Piece> piece (new Piece (i, decoder, frc));
134 _pieces.push_back (piece);
136 if (decoder->video) {
137 decoder->video->Data.connect (bind (&Player::video, this, weak_ptr<Piece> (piece), _1));
140 if (decoder->audio) {
141 decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
144 if (decoder->subtitle) {
145 decoder->subtitle->ImageStart.connect (bind (&Player::image_subtitle_start, this, weak_ptr<Piece> (piece), _1));
146 decoder->subtitle->TextStart.connect (bind (&Player::text_subtitle_start, this, weak_ptr<Piece> (piece), _1));
147 decoder->subtitle->Stop.connect (bind (&Player::subtitle_stop, this, weak_ptr<Piece> (piece), _1));
151 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
152 if (i->content->audio) {
153 BOOST_FOREACH (AudioStreamPtr j, i->content->audio->streams()) {
154 _stream_states[j] = StreamState (i, i->content->position ());
159 if (!_play_referenced) {
160 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
161 shared_ptr<DCPContent> dc = dynamic_pointer_cast<DCPContent> (i->content);
163 if (dc->reference_video()) {
164 _no_video.push_back (DCPTimePeriod (dc->position(), dc->end()));
166 if (dc->reference_audio()) {
167 _no_audio.push_back (DCPTimePeriod (dc->position(), dc->end()));
173 _last_video_time = DCPTime ();
174 _last_audio_time = DCPTime ();
175 _have_valid_pieces = true;
179 Player::playlist_content_changed (weak_ptr<Content> w, int property, bool frequent)
181 shared_ptr<Content> c = w.lock ();
187 property == ContentProperty::POSITION ||
188 property == ContentProperty::LENGTH ||
189 property == ContentProperty::TRIM_START ||
190 property == ContentProperty::TRIM_END ||
191 property == ContentProperty::PATH ||
192 property == VideoContentProperty::FRAME_TYPE ||
193 property == DCPContentProperty::NEEDS_ASSETS ||
194 property == DCPContentProperty::NEEDS_KDM ||
195 property == SubtitleContentProperty::COLOUR ||
196 property == SubtitleContentProperty::OUTLINE ||
197 property == SubtitleContentProperty::SHADOW ||
198 property == SubtitleContentProperty::EFFECT_COLOUR ||
199 property == FFmpegContentProperty::SUBTITLE_STREAM ||
200 property == VideoContentProperty::COLOUR_CONVERSION
203 _have_valid_pieces = false;
207 property == SubtitleContentProperty::LINE_SPACING ||
208 property == SubtitleContentProperty::OUTLINE_WIDTH ||
209 property == SubtitleContentProperty::Y_SCALE ||
210 property == SubtitleContentProperty::FADE_IN ||
211 property == SubtitleContentProperty::FADE_OUT ||
212 property == ContentProperty::VIDEO_FRAME_RATE ||
213 property == SubtitleContentProperty::USE ||
214 property == SubtitleContentProperty::X_OFFSET ||
215 property == SubtitleContentProperty::Y_OFFSET ||
216 property == SubtitleContentProperty::X_SCALE ||
217 property == SubtitleContentProperty::FONTS ||
218 property == VideoContentProperty::CROP ||
219 property == VideoContentProperty::SCALE ||
220 property == VideoContentProperty::FADE_IN ||
221 property == VideoContentProperty::FADE_OUT
229 Player::set_video_container_size (dcp::Size s)
231 if (s == _video_container_size) {
235 _video_container_size = s;
237 _black_image.reset (new Image (AV_PIX_FMT_RGB24, _video_container_size, true));
238 _black_image->make_black ();
244 Player::playlist_changed ()
246 _have_valid_pieces = false;
251 Player::film_changed (Film::Property p)
253 /* Here we should notice Film properties that affect our output, and
254 alert listeners that our output now would be different to how it was
255 last time we were run.
258 if (p == Film::CONTAINER) {
260 } else if (p == Film::VIDEO_FRAME_RATE) {
261 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
262 so we need new pieces here.
264 _have_valid_pieces = false;
266 } else if (p == Film::AUDIO_PROCESSOR) {
267 if (_film->audio_processor ()) {
268 _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
274 Player::transform_image_subtitles (list<ImageSubtitle> subs) const
276 list<PositionImage> all;
278 for (list<ImageSubtitle>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
283 /* We will scale the subtitle up to fit _video_container_size */
284 dcp::Size scaled_size (i->rectangle.width * _video_container_size.width, i->rectangle.height * _video_container_size.height);
286 /* Then we need a corrective translation, consisting of two parts:
288 * 1. that which is the result of the scaling of the subtitle by _video_container_size; this will be
289 * rect.x * _video_container_size.width and rect.y * _video_container_size.height.
291 * 2. that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
292 * (width_before_subtitle_scale * (1 - subtitle_x_scale) / 2) and
293 * (height_before_subtitle_scale * (1 - subtitle_y_scale) / 2).
295 * Combining these two translations gives these expressions.
302 dcp::YUV_TO_RGB_REC601,
303 i->image->pixel_format (),
308 lrint (_video_container_size.width * i->rectangle.x),
309 lrint (_video_container_size.height * i->rectangle.y)
318 shared_ptr<PlayerVideo>
319 Player::black_player_video_frame () const
321 return shared_ptr<PlayerVideo> (
323 shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
326 _video_container_size,
327 _video_container_size,
330 PresetColourConversion::all().front().conversion
336 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
338 DCPTime s = t - piece->content->position ();
339 s = min (piece->content->length_after_trim(), s);
340 s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
342 /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
343 then convert that ContentTime to frames at the content's rate. However this fails for
344 situations like content at 29.9978733fps, DCP at 30fps. The accuracy of the Time type is not
345 enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
347 Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
349 return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
353 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
355 /* See comment in dcp_to_content_video */
356 DCPTime const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime (piece->content->trim_start (), piece->frc);
357 return max (DCPTime (), d + piece->content->position ());
361 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
363 DCPTime s = t - piece->content->position ();
364 s = min (piece->content->length_after_trim(), s);
365 /* See notes in dcp_to_content_video */
366 return max (DCPTime (), DCPTime (piece->content->trim_start (), piece->frc) + s).frames_floor (_film->audio_frame_rate ());
370 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
372 /* See comment in dcp_to_content_video */
373 DCPTime const d = DCPTime::from_frames (f, _film->audio_frame_rate()) - DCPTime (piece->content->trim_start(), piece->frc);
374 return max (DCPTime (), d + piece->content->position ());
378 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
380 DCPTime s = t - piece->content->position ();
381 s = min (piece->content->length_after_trim(), s);
382 return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
386 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
388 return max (DCPTime (), DCPTime (t - piece->content->trim_start(), piece->frc) + piece->content->position());
391 list<shared_ptr<Font> >
392 Player::get_subtitle_fonts ()
394 if (!_have_valid_pieces) {
398 list<shared_ptr<Font> > fonts;
399 BOOST_FOREACH (shared_ptr<Piece>& p, _pieces) {
400 if (p->content->subtitle) {
401 /* XXX: things may go wrong if there are duplicate font IDs
402 with different font files.
404 list<shared_ptr<Font> > f = p->content->subtitle->fonts ();
405 copy (f.begin(), f.end(), back_inserter (fonts));
412 /** Set this player never to produce any video data */
414 Player::set_ignore_video ()
416 _ignore_video = 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;
433 _have_valid_pieces = false;
437 Player::set_play_referenced ()
439 _play_referenced = true;
440 _have_valid_pieces = false;
443 list<ReferencedReelAsset>
444 Player::get_reel_assets ()
446 list<ReferencedReelAsset> a;
448 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
449 shared_ptr<DCPContent> j = dynamic_pointer_cast<DCPContent> (i);
454 scoped_ptr<DCPDecoder> decoder;
456 decoder.reset (new DCPDecoder (j, _film->log()));
462 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
464 DCPOMATIC_ASSERT (j->video_frame_rate ());
465 double const cfr = j->video_frame_rate().get();
466 Frame const trim_start = j->trim_start().frames_round (cfr);
467 Frame const trim_end = j->trim_end().frames_round (cfr);
468 int const ffr = _film->video_frame_rate ();
470 DCPTime const from = i->position() + DCPTime::from_frames (offset, _film->video_frame_rate());
471 if (j->reference_video ()) {
472 shared_ptr<dcp::ReelAsset> ra = k->main_picture ();
473 DCPOMATIC_ASSERT (ra);
474 ra->set_entry_point (ra->entry_point() + trim_start);
475 ra->set_duration (ra->duration() - trim_start - trim_end);
477 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
481 if (j->reference_audio ()) {
482 shared_ptr<dcp::ReelAsset> ra = k->main_sound ();
483 DCPOMATIC_ASSERT (ra);
484 ra->set_entry_point (ra->entry_point() + trim_start);
485 ra->set_duration (ra->duration() - trim_start - trim_end);
487 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
491 if (j->reference_subtitle ()) {
492 shared_ptr<dcp::ReelAsset> ra = k->main_subtitle ();
493 DCPOMATIC_ASSERT (ra);
494 ra->set_entry_point (ra->entry_point() + trim_start);
495 ra->set_duration (ra->duration() - trim_start - trim_end);
497 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
501 /* Assume that main picture duration is the length of the reel */
502 offset += k->main_picture()->duration ();
512 if (!_have_valid_pieces) {
516 shared_ptr<Piece> earliest;
517 DCPTime earliest_content;
519 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
521 DCPTime const t = content_time_to_dcp (i, i->decoder->position());
522 if (!earliest || t < earliest_content) {
523 earliest_content = t;
529 /* Fill towards the next thing that might happen (or the end of the playlist). This is to fill gaps between content,
530 NOT to fill gaps within content (the latter is done in ::video())
532 XXX: can't we just look at content position/end and fill based on that?
534 DCPTime fill_towards = earliest ? earliest_content : _playlist->length().ceil(_film->video_frame_rate());
537 /* Fill some black if we would emit before the earliest piece of content. This is so we act like a phantom
538 Piece which emits black in spaces (we only emit if we are the earliest thing)
540 if (_last_video_time && (!earliest || *_last_video_time < earliest_content) && ((fill_towards - *_last_video_time)) >= one_video_frame()) {
541 list<DCPTimePeriod> p = subtract(DCPTimePeriod(*_last_video_time, *_last_video_time + one_video_frame()), _no_video);
543 emit_video (black_player_video_frame(), p.front().from);
546 } else if (_playlist->length() == DCPTime()) {
547 /* Special case of an empty Film; just give one black frame */
548 emit_video (black_player_video_frame(), DCPTime());
552 optional<DCPTime> audio_fill_from;
553 if (_last_audio_time) {
554 /* Fill from the last audio or seek time */
555 audio_fill_from = _last_audio_time;
558 DCPTime audio_fill_towards = fill_towards;
559 if (earliest && earliest->content->audio) {
560 audio_fill_towards += DCPTime::from_seconds (earliest->content->audio->delay() / 1000.0);
563 if (audio_fill_from && audio_fill_from < audio_fill_towards && ((audio_fill_towards - *audio_fill_from) >= one_video_frame())) {
564 DCPTimePeriod period (*audio_fill_from, audio_fill_towards);
565 if (period.duration() > one_video_frame()) {
566 period.to = period.from + one_video_frame();
568 list<DCPTimePeriod> p = subtract(period, _no_audio);
570 fill_audio (p.front());
576 earliest->done = earliest->decoder->pass ();
579 /* Emit any audio that is ready */
581 DCPTime pull_to = _playlist->length ();
582 for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
583 if (!i->second.piece->done && i->second.last_push_end < pull_to) {
584 pull_to = i->second.last_push_end;
588 list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_to);
589 for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
590 if (_last_audio_time && i->second < *_last_audio_time) {
591 /* There has been an accurate seek and we have received some audio before the seek time;
594 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
601 if (_last_audio_time) {
602 fill_audio (DCPTimePeriod (*_last_audio_time, i->second));
605 emit_audio (i->first, i->second);
608 return !earliest && !filled;
611 optional<PositionImage>
612 Player::subtitles_for_frame (DCPTime time) const
614 list<PositionImage> subtitles;
616 BOOST_FOREACH (PlayerSubtitles i, _active_subtitles.get_burnt (time, _always_burn_subtitles)) {
618 /* Image subtitles */
619 list<PositionImage> c = transform_image_subtitles (i.image);
620 copy (c.begin(), c.end(), back_inserter (subtitles));
622 /* Text subtitles (rendered to an image) */
623 if (!i.text.empty ()) {
624 list<PositionImage> s = render_subtitles (i.text, i.fonts, _video_container_size, time);
625 copy (s.begin(), s.end(), back_inserter (subtitles));
629 if (subtitles.empty ()) {
630 return optional<PositionImage> ();
633 return merge (subtitles);
637 Player::video (weak_ptr<Piece> wp, ContentVideo video)
639 shared_ptr<Piece> piece = wp.lock ();
644 FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
645 if (frc.skip && (video.frame % 2) == 1) {
649 /* Time and period of the frame we will emit */
650 DCPTime const time = content_video_to_dcp (piece, video.frame);
651 DCPTimePeriod const period (time, time + one_video_frame());
653 /* Discard if it's outside the content's period or if it's before the last accurate seek */
655 time < piece->content->position() ||
656 time >= piece->content->end() ||
657 (_last_video_time && time < *_last_video_time)) {
661 /* Fill gaps that we discover now that we have some video which needs to be emitted */
663 optional<DCPTime> fill_to;
664 if (_last_video_time) {
665 fill_to = _last_video_time;
669 /* XXX: this may not work for 3D */
670 BOOST_FOREACH (DCPTimePeriod i, subtract(DCPTimePeriod (*fill_to, time), _no_video)) {
671 for (DCPTime j = i.from; j < i.to; j += one_video_frame()) {
672 LastVideoMap::const_iterator k = _last_video.find (wp);
673 if (k != _last_video.end ()) {
674 emit_video (k->second, j);
676 emit_video (black_player_video_frame(), j);
682 _last_video[wp].reset (
685 piece->content->video->crop (),
686 piece->content->video->fade (video.frame),
687 piece->content->video->scale().size (
688 piece->content->video, _video_container_size, _film->frame_size ()
690 _video_container_size,
693 piece->content->video->colour_conversion ()
697 emit_video (_last_video[wp], time);
700 /** Do our common processing on some audio */
702 Player::audio_transform (shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time)
704 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
708 if (content->gain() != 0) {
709 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
710 gain->apply_gain (content->gain ());
711 content_audio.audio = gain;
716 content_audio.audio = remap (content_audio.audio, _film->audio_channels(), stream->mapping());
720 if (_audio_processor) {
721 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
726 _audio_merger.push (content_audio.audio, time);
727 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
728 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
732 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
734 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
736 shared_ptr<Piece> piece = wp.lock ();
741 shared_ptr<AudioContent> content = piece->content->audio;
742 DCPOMATIC_ASSERT (content);
744 /* Compute time in the DCP */
745 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
746 /* And the end of this block in the DCP */
747 DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate());
749 /* Remove anything that comes before the start or after the end of the content */
750 if (time < piece->content->position()) {
751 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
753 /* This audio is entirely discarded */
756 content_audio.audio = cut.first;
758 } else if (time > piece->content->end()) {
761 } else if (end > piece->content->end()) {
762 Frame const remaining_frames = DCPTime(piece->content->end() - time).frames_round(_film->audio_frame_rate());
763 if (remaining_frames == 0) {
766 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
767 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
768 content_audio.audio = cut;
771 audio_transform (content, stream, content_audio, time);
775 Player::image_subtitle_start (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
777 shared_ptr<Piece> piece = wp.lock ();
782 /* Apply content's subtitle offsets */
783 subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
784 subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
786 /* Apply content's subtitle scale */
787 subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
788 subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
790 /* Apply a corrective translation to keep the subtitle centred after that scale */
791 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * (piece->content->subtitle->x_scale() - 1);
792 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * (piece->content->subtitle->y_scale() - 1);
795 ps.image.push_back (subtitle.sub);
796 DCPTime from (content_time_to_dcp (piece, subtitle.from()));
798 _active_subtitles.add_from (wp, ps, from);
802 Player::text_subtitle_start (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
804 shared_ptr<Piece> piece = wp.lock ();
810 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
812 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
813 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
814 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
815 float const xs = piece->content->subtitle->x_scale();
816 float const ys = piece->content->subtitle->y_scale();
817 float size = s.size();
819 /* Adjust size to express the common part of the scaling;
820 e.g. if xs = ys = 0.5 we scale size by 2.
822 if (xs > 1e-5 && ys > 1e-5) {
823 size *= 1 / min (1 / xs, 1 / ys);
827 /* Then express aspect ratio changes */
828 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
829 s.set_aspect_adjust (xs / ys);
832 s.set_in (dcp::Time(from.seconds(), 1000));
833 ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
834 ps.add_fonts (piece->content->subtitle->fonts ());
837 _active_subtitles.add_from (wp, ps, from);
841 Player::subtitle_stop (weak_ptr<Piece> wp, ContentTime to)
843 if (!_active_subtitles.have (wp)) {
847 shared_ptr<Piece> piece = wp.lock ();
852 DCPTime const dcp_to = content_time_to_dcp (piece, to);
854 pair<PlayerSubtitles, DCPTime> from = _active_subtitles.add_to (wp, dcp_to);
856 if (piece->content->subtitle->use() && !_always_burn_subtitles && !piece->content->subtitle->burn()) {
857 Subtitle (from.first, DCPTimePeriod (from.second, dcp_to));
862 Player::seek (DCPTime time, bool accurate)
864 if (_audio_processor) {
865 _audio_processor->flush ();
868 _audio_merger.clear ();
869 _active_subtitles.clear ();
871 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
872 if (time < i->content->position()) {
873 /* Before; seek to 0 */
874 i->decoder->seek (ContentTime(), accurate);
876 } else if (i->content->position() <= time && time < i->content->end()) {
877 /* During; seek to position */
878 i->decoder->seek (dcp_to_content_time (i, time), accurate);
881 /* After; this piece is done */
887 _last_video_time = time;
888 _last_audio_time = time;
890 _last_video_time = optional<DCPTime>();
891 _last_audio_time = optional<DCPTime>();
894 _last_video.clear ();
898 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
900 optional<PositionImage> subtitles = subtitles_for_frame (time);
902 pv->set_subtitle (subtitles.get ());
907 if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
908 _last_video_time = time + one_video_frame();
909 _active_subtitles.clear_before (time);
914 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
917 _last_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate());
921 Player::fill_audio (DCPTimePeriod period)
923 if (period.from == period.to) {
927 DCPOMATIC_ASSERT (period.from < period.to);
929 BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_audio)) {
932 DCPTime block = min (DCPTime::from_seconds (0.5), i.to - t);
933 Frame const samples = block.frames_round(_film->audio_frame_rate());
935 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
936 silence->make_silent ();
937 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);