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 "resampler.h"
51 #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_audio (false)
87 , _always_burn_subtitles (false)
89 , _play_referenced (false)
90 , _audio_merger (_film->audio_frame_rate())
92 _film_changed_connection = _film->Changed.connect (bind (&Player::film_changed, this, _1));
93 _playlist_changed_connection = _playlist->Changed.connect (bind (&Player::playlist_changed, this));
94 _playlist_content_changed_connection = _playlist->ContentChanged.connect (bind (&Player::playlist_content_changed, this, _1, _2, _3));
95 set_video_container_size (_film->frame_size ());
97 film_changed (Film::AUDIO_PROCESSOR);
99 seek (DCPTime (), true);
103 Player::setup_pieces ()
107 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
109 if (!i->paths_valid ()) {
113 shared_ptr<Decoder> decoder = decoder_factory (i, _film->log());
114 FrameRateChange frc (i->active_video_frame_rate(), _film->video_frame_rate());
117 /* Not something that we can decode; e.g. Atmos content */
121 if (decoder->video && _ignore_video) {
122 decoder->video->set_ignore ();
125 if (decoder->audio && _ignore_audio) {
126 decoder->audio->set_ignore ();
129 shared_ptr<DCPDecoder> dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
130 if (dcp && _play_referenced) {
131 dcp->set_decode_referenced ();
134 shared_ptr<Piece> piece (new Piece (i, decoder, frc));
135 _pieces.push_back (piece);
137 if (decoder->video) {
138 decoder->video->Data.connect (bind (&Player::video, this, weak_ptr<Piece> (piece), _1));
141 if (decoder->audio) {
142 decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
145 if (decoder->subtitle) {
146 decoder->subtitle->ImageData.connect (bind (&Player::image_subtitle, this, weak_ptr<Piece> (piece), _1));
147 decoder->subtitle->TextData.connect (bind (&Player::text_subtitle, 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 _have_valid_pieces = true;
177 Player::playlist_content_changed (weak_ptr<Content> w, int property, bool frequent)
179 shared_ptr<Content> c = w.lock ();
185 property == ContentProperty::POSITION ||
186 property == ContentProperty::LENGTH ||
187 property == ContentProperty::TRIM_START ||
188 property == ContentProperty::TRIM_END ||
189 property == ContentProperty::PATH ||
190 property == VideoContentProperty::FRAME_TYPE ||
191 property == DCPContentProperty::NEEDS_ASSETS ||
192 property == DCPContentProperty::NEEDS_KDM ||
193 property == SubtitleContentProperty::COLOUR ||
194 property == SubtitleContentProperty::OUTLINE ||
195 property == SubtitleContentProperty::SHADOW ||
196 property == SubtitleContentProperty::EFFECT_COLOUR ||
197 property == FFmpegContentProperty::SUBTITLE_STREAM ||
198 property == VideoContentProperty::COLOUR_CONVERSION
201 _have_valid_pieces = false;
205 property == SubtitleContentProperty::LINE_SPACING ||
206 property == SubtitleContentProperty::OUTLINE_WIDTH ||
207 property == SubtitleContentProperty::Y_SCALE ||
208 property == SubtitleContentProperty::FADE_IN ||
209 property == SubtitleContentProperty::FADE_OUT ||
210 property == ContentProperty::VIDEO_FRAME_RATE ||
211 property == SubtitleContentProperty::USE ||
212 property == SubtitleContentProperty::X_OFFSET ||
213 property == SubtitleContentProperty::Y_OFFSET ||
214 property == SubtitleContentProperty::X_SCALE ||
215 property == SubtitleContentProperty::FONTS ||
216 property == VideoContentProperty::CROP ||
217 property == VideoContentProperty::SCALE ||
218 property == VideoContentProperty::FADE_IN ||
219 property == VideoContentProperty::FADE_OUT
227 Player::set_video_container_size (dcp::Size s)
229 _video_container_size = s;
231 _black_image.reset (new Image (AV_PIX_FMT_RGB24, _video_container_size, true));
232 _black_image->make_black ();
236 Player::playlist_changed ()
238 _have_valid_pieces = false;
243 Player::film_changed (Film::Property p)
245 /* Here we should notice Film properties that affect our output, and
246 alert listeners that our output now would be different to how it was
247 last time we were run.
250 if (p == Film::CONTAINER) {
252 } else if (p == Film::VIDEO_FRAME_RATE) {
253 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
254 so we need new pieces here.
256 _have_valid_pieces = false;
258 } else if (p == Film::AUDIO_PROCESSOR) {
259 if (_film->audio_processor ()) {
260 _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
266 Player::transform_image_subtitles (list<ImageSubtitle> subs) const
268 list<PositionImage> all;
270 for (list<ImageSubtitle>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
275 /* We will scale the subtitle up to fit _video_container_size */
276 dcp::Size scaled_size (i->rectangle.width * _video_container_size.width, i->rectangle.height * _video_container_size.height);
278 /* Then we need a corrective translation, consisting of two parts:
280 * 1. that which is the result of the scaling of the subtitle by _video_container_size; this will be
281 * rect.x * _video_container_size.width and rect.y * _video_container_size.height.
283 * 2. that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
284 * (width_before_subtitle_scale * (1 - subtitle_x_scale) / 2) and
285 * (height_before_subtitle_scale * (1 - subtitle_y_scale) / 2).
287 * Combining these two translations gives these expressions.
294 dcp::YUV_TO_RGB_REC601,
295 i->image->pixel_format (),
300 lrint (_video_container_size.width * i->rectangle.x),
301 lrint (_video_container_size.height * i->rectangle.y)
310 shared_ptr<PlayerVideo>
311 Player::black_player_video_frame () const
313 return shared_ptr<PlayerVideo> (
315 shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
318 _video_container_size,
319 _video_container_size,
322 PresetColourConversion::all().front().conversion
328 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
330 DCPTime s = t - piece->content->position ();
331 s = min (piece->content->length_after_trim(), s);
332 s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
334 /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
335 then convert that ContentTime to frames at the content's rate. However this fails for
336 situations like content at 29.9978733fps, DCP at 30fps. The accuracy of the Time type is not
337 enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
339 Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
341 return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
345 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
347 /* See comment in dcp_to_content_video */
348 DCPTime const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime (piece->content->trim_start (), piece->frc);
349 return max (DCPTime (), d + piece->content->position ());
353 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
355 DCPTime s = t - piece->content->position ();
356 s = min (piece->content->length_after_trim(), s);
357 /* See notes in dcp_to_content_video */
358 return max (DCPTime (), DCPTime (piece->content->trim_start (), piece->frc) + s).frames_floor (_film->audio_frame_rate ());
362 Player::resampled_audio_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, _film->audio_frame_rate()) - DCPTime (piece->content->trim_start (), piece->frc);
366 return max (DCPTime (), d + piece->content->position ());
370 Player::dcp_to_content_time (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 return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
378 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
380 return max (DCPTime (), DCPTime (t - piece->content->trim_start(), piece->frc) + piece->content->position());
383 list<shared_ptr<Font> >
384 Player::get_subtitle_fonts ()
386 if (!_have_valid_pieces) {
390 list<shared_ptr<Font> > fonts;
391 BOOST_FOREACH (shared_ptr<Piece>& p, _pieces) {
392 if (p->content->subtitle) {
393 /* XXX: things may go wrong if there are duplicate font IDs
394 with different font files.
396 list<shared_ptr<Font> > f = p->content->subtitle->fonts ();
397 copy (f.begin(), f.end(), back_inserter (fonts));
404 /** Set this player never to produce any video data */
406 Player::set_ignore_video ()
408 _ignore_video = true;
411 /** Set this player never to produce any audio data */
413 Player::set_ignore_audio ()
415 _ignore_audio = true;
418 /** Set whether or not this player should always burn text subtitles into the image,
419 * regardless of the content settings.
420 * @param burn true to always burn subtitles, false to obey content settings.
423 Player::set_always_burn_subtitles (bool burn)
425 _always_burn_subtitles = burn;
432 _have_valid_pieces = false;
436 Player::set_play_referenced ()
438 _play_referenced = true;
439 _have_valid_pieces = false;
442 list<ReferencedReelAsset>
443 Player::get_reel_assets ()
445 list<ReferencedReelAsset> a;
447 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
448 shared_ptr<DCPContent> j = dynamic_pointer_cast<DCPContent> (i);
453 scoped_ptr<DCPDecoder> decoder;
455 decoder.reset (new DCPDecoder (j, _film->log()));
461 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
463 DCPOMATIC_ASSERT (j->video_frame_rate ());
464 double const cfr = j->video_frame_rate().get();
465 Frame const trim_start = j->trim_start().frames_round (cfr);
466 Frame const trim_end = j->trim_end().frames_round (cfr);
467 int const ffr = _film->video_frame_rate ();
469 DCPTime const from = i->position() + DCPTime::from_frames (offset, _film->video_frame_rate());
470 if (j->reference_video ()) {
471 shared_ptr<dcp::ReelAsset> ra = k->main_picture ();
472 DCPOMATIC_ASSERT (ra);
473 ra->set_entry_point (ra->entry_point() + trim_start);
474 ra->set_duration (ra->duration() - trim_start - trim_end);
476 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
480 if (j->reference_audio ()) {
481 shared_ptr<dcp::ReelAsset> ra = k->main_sound ();
482 DCPOMATIC_ASSERT (ra);
483 ra->set_entry_point (ra->entry_point() + trim_start);
484 ra->set_duration (ra->duration() - trim_start - trim_end);
486 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
490 if (j->reference_subtitle ()) {
491 shared_ptr<dcp::ReelAsset> ra = k->main_subtitle ();
492 DCPOMATIC_ASSERT (ra);
493 ra->set_entry_point (ra->entry_point() + trim_start);
494 ra->set_duration (ra->duration() - trim_start - trim_end);
496 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
500 /* Assume that main picture duration is the length of the reel */
501 offset += k->main_picture()->duration ();
508 list<shared_ptr<Piece> >
509 Player::overlaps (DCPTime from, DCPTime to, boost::function<bool (Content *)> valid)
511 if (!_have_valid_pieces) {
515 list<shared_ptr<Piece> > overlaps;
516 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
517 if (valid (i->content.get ()) && i->content->position() < to && i->content->end() > from) {
518 overlaps.push_back (i);
528 if (!_have_valid_pieces) {
532 shared_ptr<Piece> earliest;
533 DCPTime earliest_content;
535 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
537 DCPTime const t = i->content->position() + DCPTime (i->decoder->position(), i->frc);
538 if (!earliest || t < earliest_content) {
539 earliest_content = t;
546 /* No more content; fill up with silent black */
547 DCPTimePeriod remaining_video (DCPTime(), _playlist->length());
549 remaining_video.from = _last_time.get() + one_video_frame();
551 fill_video (remaining_video);
552 fill_audio (DCPTimePeriod (_last_audio_time, _playlist->length()));
556 earliest->done = earliest->decoder->pass ();
557 if (earliest->done && earliest->content->audio) {
558 /* Flush the Player audio system for this piece */
559 BOOST_FOREACH (AudioStreamPtr i, earliest->content->audio->streams()) {
560 audio_flush (earliest, i);
564 /* Emit any audio that is ready */
566 DCPTime pull_from = _playlist->length ();
567 for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
568 if (!i->second.piece->done && i->second.last_push_end < pull_from) {
569 pull_from = i->second.last_push_end;
573 list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_from);
574 for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
575 DCPOMATIC_ASSERT (i->second >= _last_audio_time);
576 fill_audio (DCPTimePeriod (_last_audio_time, i->second));
577 Audio (i->first, i->second);
578 _last_audio_time = i->second + DCPTime::from_frames(i->first->frames(), _film->audio_frame_rate());
585 Player::video (weak_ptr<Piece> wp, ContentVideo video)
587 shared_ptr<Piece> piece = wp.lock ();
592 FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
593 if (frc.skip && (video.frame % 2) == 1) {
597 /* Time and period of the frame we will emit */
598 DCPTime const time = content_video_to_dcp (piece, video.frame);
599 DCPTimePeriod const period (time, time + one_video_frame());
601 /* Discard if it's outside the content's period */
602 if (time < piece->content->position() || time >= piece->content->end()) {
606 /* Get any subtitles */
608 optional<PositionImage> subtitles;
610 for (list<pair<PlayerSubtitles, DCPTimePeriod> >::const_iterator i = _subtitles.begin(); i != _subtitles.end(); ++i) {
612 if (!i->second.overlap (period)) {
616 list<PositionImage> sub_images;
618 /* Image subtitles */
619 list<PositionImage> c = transform_image_subtitles (i->first.image);
620 copy (c.begin(), c.end(), back_inserter (sub_images));
622 /* Text subtitles (rendered to an image) */
623 if (!i->first.text.empty ()) {
624 list<PositionImage> s = render_subtitles (i->first.text, i->first.fonts, _video_container_size, time);
625 copy (s.begin (), s.end (), back_inserter (sub_images));
628 if (!sub_images.empty ()) {
629 subtitles = merge (sub_images);
636 fill_video (DCPTimePeriod (_last_time.get() + one_video_frame(), time));
642 piece->content->video->crop (),
643 piece->content->video->fade (video.frame),
644 piece->content->video->scale().size (
645 piece->content->video, _video_container_size, _film->frame_size ()
647 _video_container_size,
650 piece->content->video->colour_conversion ()
655 _last_video->set_subtitle (subtitles.get ());
660 Video (_last_video, *_last_time);
662 /* Discard any subtitles we no longer need */
664 for (list<pair<PlayerSubtitles, DCPTimePeriod> >::iterator i = _subtitles.begin (); i != _subtitles.end(); ) {
665 list<pair<PlayerSubtitles, DCPTimePeriod> >::iterator tmp = i;
668 if (i->second.to < time) {
669 _subtitles.erase (i);
677 Player::audio_flush (shared_ptr<Piece> piece, AudioStreamPtr stream)
679 shared_ptr<AudioContent> content = piece->content->audio;
680 DCPOMATIC_ASSERT (content);
682 shared_ptr<Resampler> r = resampler (content, stream);
683 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->flush ();
684 ContentAudio content_audio;
685 content_audio.audio = ro.first;
686 content_audio.frame = ro.second;
688 /* Compute time in the DCP */
689 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
691 audio_transform (content, stream, content_audio, time);
694 /** Do our common processing on some audio */
696 Player::audio_transform (shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time)
700 if (content->gain() != 0) {
701 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
702 gain->apply_gain (content->gain ());
703 content_audio.audio = gain;
708 shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), content_audio.audio->frames()));
709 dcp_mapped->make_silent ();
711 AudioMapping map = stream->mapping ();
712 for (int i = 0; i < map.input_channels(); ++i) {
713 for (int j = 0; j < dcp_mapped->channels(); ++j) {
714 if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
715 dcp_mapped->accumulate_channel (
716 content_audio.audio.get(),
718 static_cast<dcp::Channel> (j),
719 map.get (i, static_cast<dcp::Channel> (j))
725 content_audio.audio = dcp_mapped;
729 if (_audio_processor) {
730 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
735 _audio_merger.push (content_audio.audio, time);
736 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
737 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
741 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
743 shared_ptr<Piece> piece = wp.lock ();
748 shared_ptr<AudioContent> content = piece->content->audio;
749 DCPOMATIC_ASSERT (content);
752 if (stream->frame_rate() != content->resampled_frame_rate()) {
753 shared_ptr<Resampler> r = resampler (content, stream);
754 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->run (content_audio.audio, content_audio.frame);
755 content_audio.audio = ro.first;
756 content_audio.frame = ro.second;
759 /* XXX: end-trimming used to be checked here */
761 /* Compute time in the DCP */
762 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
764 /* Remove anything that comes before the start of the content */
765 if (time < piece->content->position()) {
766 DCPTime const discard_time = piece->content->position() - time;
767 Frame discard_frames = discard_time.frames_round(_film->audio_frame_rate());
768 Frame remaining_frames = content_audio.audio->frames() - discard_frames;
769 if (remaining_frames <= 0) {
770 /* This audio is entirely discarded */
773 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
774 cut->copy_from (content_audio.audio.get(), remaining_frames, discard_frames, 0);
775 content_audio.audio = cut;
776 time += discard_time;
779 audio_transform (content, stream, content_audio, time);
783 Player::image_subtitle (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
785 shared_ptr<Piece> piece = wp.lock ();
790 /* Apply content's subtitle offsets */
791 subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
792 subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
794 /* Apply content's subtitle scale */
795 subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
796 subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
798 /* Apply a corrective translation to keep the subtitle centred after that scale */
799 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * (piece->content->subtitle->x_scale() - 1);
800 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * (piece->content->subtitle->y_scale() - 1);
803 ps.image.push_back (subtitle.sub);
804 DCPTimePeriod period (content_time_to_dcp (piece, subtitle.period().from), content_time_to_dcp (piece, subtitle.period().to));
806 if (piece->content->subtitle->use() && (piece->content->subtitle->burn() || _always_burn_subtitles)) {
807 _subtitles.push_back (make_pair (ps, period));
809 Subtitle (ps, period);
814 Player::text_subtitle (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
816 shared_ptr<Piece> piece = wp.lock ();
822 DCPTimePeriod const period (content_time_to_dcp (piece, subtitle.period().from), content_time_to_dcp (piece, subtitle.period().to));
824 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
825 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
826 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
827 float const xs = piece->content->subtitle->x_scale();
828 float const ys = piece->content->subtitle->y_scale();
829 float size = s.size();
831 /* Adjust size to express the common part of the scaling;
832 e.g. if xs = ys = 0.5 we scale size by 2.
834 if (xs > 1e-5 && ys > 1e-5) {
835 size *= 1 / min (1 / xs, 1 / ys);
839 /* Then express aspect ratio changes */
840 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
841 s.set_aspect_adjust (xs / ys);
844 s.set_in (dcp::Time(period.from.seconds(), 1000));
845 s.set_out (dcp::Time(period.to.seconds(), 1000));
846 ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
847 ps.add_fonts (piece->content->subtitle->fonts ());
850 if (piece->content->subtitle->use() && (piece->content->subtitle->burn() || _always_burn_subtitles)) {
851 _subtitles.push_back (make_pair (ps, period));
853 Subtitle (ps, period);
858 Player::seek (DCPTime time, bool accurate)
860 if (_audio_processor) {
861 _audio_processor->flush ();
864 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
865 if (i->content->position() <= time && time < i->content->end()) {
866 i->decoder->seek (dcp_to_content_time (i, time), accurate);
872 _last_time = time - one_video_frame ();
874 _last_time = optional<DCPTime> ();
878 shared_ptr<Resampler>
879 Player::resampler (shared_ptr<const AudioContent> content, AudioStreamPtr stream)
881 ResamplerMap::const_iterator i = _resamplers.find (make_pair (content, stream));
882 if (i != _resamplers.end ()) {
887 "Creating new resampler from %1 to %2 with %3 channels",
888 stream->frame_rate(),
889 content->resampled_frame_rate(),
893 shared_ptr<Resampler> r (
894 new Resampler (stream->frame_rate(), content->resampled_frame_rate(), stream->channels())
897 _resamplers[make_pair(content, stream)] = r;
902 Player::fill_video (DCPTimePeriod period)
904 /* XXX: this may not work for 3D */
905 BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_video)) {
906 for (DCPTime j = i.from; j < i.to; j += one_video_frame()) {
907 if (_playlist->video_content_at(j) && _last_video) {
908 Video (shared_ptr<PlayerVideo> (new PlayerVideo (*_last_video)), j);
910 Video (black_player_video_frame(), j);
917 Player::fill_audio (DCPTimePeriod period)
919 BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_audio)) {
922 DCPTime block = min (DCPTime::from_seconds (0.5), i.to - t);
923 Frame const samples = block.frames_round(_film->audio_frame_rate());
925 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
926 silence->make_silent ();
935 Player::one_video_frame () const
937 return DCPTime::from_frames (1, _film->video_frame_rate ());