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->ImageStart.connect (bind (&Player::image_subtitle_start, this, weak_ptr<Piece> (piece), _1));
147 decoder->subtitle->TextStart.connect (bind (&Player::text_subtitle_start, this, weak_ptr<Piece> (piece), _1));
148 decoder->subtitle->Stop.connect (bind (&Player::subtitle_stop, this, weak_ptr<Piece> (piece), _1));
152 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
153 if (i->content->audio) {
154 BOOST_FOREACH (AudioStreamPtr j, i->content->audio->streams()) {
155 _stream_states[j] = StreamState (i, i->content->position ());
160 if (!_play_referenced) {
161 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
162 shared_ptr<DCPContent> dc = dynamic_pointer_cast<DCPContent> (i->content);
164 if (dc->reference_video()) {
165 _no_video.push_back (DCPTimePeriod (dc->position(), dc->end()));
167 if (dc->reference_audio()) {
168 _no_audio.push_back (DCPTimePeriod (dc->position(), dc->end()));
174 _last_video_time = optional<DCPTime> ();
175 _last_audio_time = optional<DCPTime> ();
176 _have_valid_pieces = true;
180 Player::playlist_content_changed (weak_ptr<Content> w, int property, bool frequent)
182 shared_ptr<Content> c = w.lock ();
188 property == ContentProperty::POSITION ||
189 property == ContentProperty::LENGTH ||
190 property == ContentProperty::TRIM_START ||
191 property == ContentProperty::TRIM_END ||
192 property == ContentProperty::PATH ||
193 property == VideoContentProperty::FRAME_TYPE ||
194 property == DCPContentProperty::NEEDS_ASSETS ||
195 property == DCPContentProperty::NEEDS_KDM ||
196 property == SubtitleContentProperty::COLOUR ||
197 property == SubtitleContentProperty::OUTLINE ||
198 property == SubtitleContentProperty::SHADOW ||
199 property == SubtitleContentProperty::EFFECT_COLOUR ||
200 property == FFmpegContentProperty::SUBTITLE_STREAM ||
201 property == VideoContentProperty::COLOUR_CONVERSION
204 _have_valid_pieces = false;
208 property == SubtitleContentProperty::LINE_SPACING ||
209 property == SubtitleContentProperty::OUTLINE_WIDTH ||
210 property == SubtitleContentProperty::Y_SCALE ||
211 property == SubtitleContentProperty::FADE_IN ||
212 property == SubtitleContentProperty::FADE_OUT ||
213 property == ContentProperty::VIDEO_FRAME_RATE ||
214 property == SubtitleContentProperty::USE ||
215 property == SubtitleContentProperty::X_OFFSET ||
216 property == SubtitleContentProperty::Y_OFFSET ||
217 property == SubtitleContentProperty::X_SCALE ||
218 property == SubtitleContentProperty::FONTS ||
219 property == VideoContentProperty::CROP ||
220 property == VideoContentProperty::SCALE ||
221 property == VideoContentProperty::FADE_IN ||
222 property == VideoContentProperty::FADE_OUT
230 Player::set_video_container_size (dcp::Size s)
232 if (s == _video_container_size) {
236 _video_container_size = s;
238 _black_image.reset (new Image (AV_PIX_FMT_RGB24, _video_container_size, true));
239 _black_image->make_black ();
245 Player::playlist_changed ()
247 _have_valid_pieces = false;
252 Player::film_changed (Film::Property p)
254 /* Here we should notice Film properties that affect our output, and
255 alert listeners that our output now would be different to how it was
256 last time we were run.
259 if (p == Film::CONTAINER) {
261 } else if (p == Film::VIDEO_FRAME_RATE) {
262 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
263 so we need new pieces here.
265 _have_valid_pieces = false;
267 } else if (p == Film::AUDIO_PROCESSOR) {
268 if (_film->audio_processor ()) {
269 _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
275 Player::transform_image_subtitles (list<ImageSubtitle> subs) const
277 list<PositionImage> all;
279 for (list<ImageSubtitle>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
284 /* We will scale the subtitle up to fit _video_container_size */
285 dcp::Size scaled_size (i->rectangle.width * _video_container_size.width, i->rectangle.height * _video_container_size.height);
287 /* Then we need a corrective translation, consisting of two parts:
289 * 1. that which is the result of the scaling of the subtitle by _video_container_size; this will be
290 * rect.x * _video_container_size.width and rect.y * _video_container_size.height.
292 * 2. that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
293 * (width_before_subtitle_scale * (1 - subtitle_x_scale) / 2) and
294 * (height_before_subtitle_scale * (1 - subtitle_y_scale) / 2).
296 * Combining these two translations gives these expressions.
303 dcp::YUV_TO_RGB_REC601,
304 i->image->pixel_format (),
309 lrint (_video_container_size.width * i->rectangle.x),
310 lrint (_video_container_size.height * i->rectangle.y)
319 shared_ptr<PlayerVideo>
320 Player::black_player_video_frame () const
322 return shared_ptr<PlayerVideo> (
324 shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
327 _video_container_size,
328 _video_container_size,
331 PresetColourConversion::all().front().conversion
337 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
339 DCPTime s = t - piece->content->position ();
340 s = min (piece->content->length_after_trim(), s);
341 s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
343 /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
344 then convert that ContentTime to frames at the content's rate. However this fails for
345 situations like content at 29.9978733fps, DCP at 30fps. The accuracy of the Time type is not
346 enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
348 Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
350 return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
354 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
356 /* See comment in dcp_to_content_video */
357 DCPTime const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime (piece->content->trim_start (), piece->frc);
358 return max (DCPTime (), d + piece->content->position ());
362 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
364 DCPTime s = t - piece->content->position ();
365 s = min (piece->content->length_after_trim(), s);
366 /* See notes in dcp_to_content_video */
367 return max (DCPTime (), DCPTime (piece->content->trim_start (), piece->frc) + s).frames_floor (_film->audio_frame_rate ());
371 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
373 /* See comment in dcp_to_content_video */
374 DCPTime const d = DCPTime::from_frames (f, _film->audio_frame_rate()) - DCPTime (piece->content->trim_start(), piece->frc);
375 return max (DCPTime (), d + piece->content->position ());
379 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
381 DCPTime s = t - piece->content->position ();
382 s = min (piece->content->length_after_trim(), s);
383 return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
387 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
389 return max (DCPTime (), DCPTime (t - piece->content->trim_start(), piece->frc) + piece->content->position());
392 list<shared_ptr<Font> >
393 Player::get_subtitle_fonts ()
395 if (!_have_valid_pieces) {
399 list<shared_ptr<Font> > fonts;
400 BOOST_FOREACH (shared_ptr<Piece>& p, _pieces) {
401 if (p->content->subtitle) {
402 /* XXX: things may go wrong if there are duplicate font IDs
403 with different font files.
405 list<shared_ptr<Font> > f = p->content->subtitle->fonts ();
406 copy (f.begin(), f.end(), back_inserter (fonts));
413 /** Set this player never to produce any video data */
415 Player::set_ignore_video ()
417 _ignore_video = true;
420 /** Set whether or not this player should always burn text subtitles into the image,
421 * regardless of the content settings.
422 * @param burn true to always burn subtitles, false to obey content settings.
425 Player::set_always_burn_subtitles (bool burn)
427 _always_burn_subtitles = burn;
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()));
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 shared_ptr<Piece> earliest;
518 DCPTime earliest_content;
520 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
522 DCPTime const t = i->content->position() + DCPTime (i->decoder->position(), i->frc);
523 if (!earliest || t < earliest_content) {
524 earliest_content = t;
531 /* No more content; fill up with silent black */
532 DCPTimePeriod remaining_video (DCPTime(), _playlist->length());
533 if (_last_video_time) {
534 remaining_video.from = _last_video_time.get();
536 fill_video (remaining_video);
537 DCPTimePeriod remaining_audio (DCPTime(), _playlist->length());
538 if (_last_audio_time) {
539 remaining_audio.from = _last_audio_time.get();
541 fill_audio (remaining_audio);
545 earliest->done = earliest->decoder->pass ();
546 if (earliest->done && earliest->content->audio) {
547 /* Flush the Player audio system for this piece */
548 BOOST_FOREACH (AudioStreamPtr i, earliest->content->audio->streams()) {
549 audio_flush (earliest, i);
553 /* Emit any audio that is ready */
555 DCPTime pull_from = _playlist->length ();
556 for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
557 if (!i->second.piece->done && i->second.last_push_end < pull_from) {
558 pull_from = i->second.last_push_end;
562 list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_from);
563 for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
564 if (_last_audio_time && i->second < _last_audio_time.get()) {
565 /* There has been an accurate seek and we have received some audio before the seek time;
568 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
575 if (_last_audio_time) {
576 fill_audio (DCPTimePeriod (_last_audio_time.get(), i->second));
579 Audio (i->first, i->second);
580 _last_audio_time = i->second + DCPTime::from_frames(i->first->frames(), _film->audio_frame_rate());
587 Player::video (weak_ptr<Piece> wp, ContentVideo video)
589 shared_ptr<Piece> piece = wp.lock ();
594 FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
595 if (frc.skip && (video.frame % 2) == 1) {
599 /* Time and period of the frame we will emit */
600 DCPTime const time = content_video_to_dcp (piece, video.frame);
601 DCPTimePeriod const period (time, time + one_video_frame());
603 /* Discard if it's outside the content's period or if it's before the last accurate seek */
604 if (time < piece->content->position() || time >= piece->content->end() || (_last_video_time && time < _last_video_time)) {
608 /* Get any subtitles */
610 optional<PositionImage> subtitles;
612 for (ActiveSubtitlesMap::const_iterator i = _active_subtitles.begin(); i != _active_subtitles.end(); ++i) {
614 shared_ptr<Piece> sub_piece = i->first.lock ();
619 if (!sub_piece->content->subtitle->use() || (!_always_burn_subtitles && !piece->content->subtitle->burn())) {
623 ActiveSubtitles sub = i->second;
625 if (sub.from > time || (sub.to && sub.to.get() <= time)) {
629 list<PositionImage> sub_images;
631 /* Image subtitles */
632 list<PositionImage> c = transform_image_subtitles (sub.subs.image);
633 copy (c.begin(), c.end(), back_inserter (sub_images));
635 /* Text subtitles (rendered to an image) */
636 if (!sub.subs.text.empty ()) {
637 list<PositionImage> s = render_subtitles (sub.subs.text, sub.subs.fonts, _video_container_size, time);
638 copy (s.begin (), s.end (), back_inserter (sub_images));
641 if (!sub_images.empty ()) {
642 subtitles = merge (sub_images);
646 /* Fill gaps caused by (the hopefully rare event of) a decoder not emitting contiguous video */
648 if (_last_video_time) {
649 fill_video (DCPTimePeriod (_last_video_time.get(), time));
655 piece->content->video->crop (),
656 piece->content->video->fade (video.frame),
657 piece->content->video->scale().size (
658 piece->content->video, _video_container_size, _film->frame_size ()
660 _video_container_size,
663 piece->content->video->colour_conversion ()
668 _last_video->set_subtitle (subtitles.get ());
671 Video (_last_video, time);
673 _last_video_time = time + one_video_frame ();
675 /* Clear any finished _active_subtitles */
676 ActiveSubtitlesMap updated;
677 for (ActiveSubtitlesMap::const_iterator i = _active_subtitles.begin(); i != _active_subtitles.end(); ++i) {
678 if (!i->second.to || i->second.to.get() >= time) {
679 updated[i->first] = i->second;
682 _active_subtitles = updated;
686 Player::audio_flush (shared_ptr<Piece> piece, AudioStreamPtr stream)
688 shared_ptr<AudioContent> content = piece->content->audio;
689 DCPOMATIC_ASSERT (content);
691 shared_ptr<Resampler> r = resampler (content, stream, false);
696 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->flush ();
697 if (ro.first->frames() == 0) {
701 ContentAudio content_audio;
702 content_audio.audio = ro.first;
703 content_audio.frame = ro.second;
705 /* Compute time in the DCP */
706 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
708 audio_transform (content, stream, content_audio, time);
711 /** Do our common processing on some audio */
713 Player::audio_transform (shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time)
715 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
719 if (content->gain() != 0) {
720 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
721 gain->apply_gain (content->gain ());
722 content_audio.audio = gain;
727 shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), content_audio.audio->frames()));
728 dcp_mapped->make_silent ();
730 AudioMapping map = stream->mapping ();
731 for (int i = 0; i < map.input_channels(); ++i) {
732 for (int j = 0; j < dcp_mapped->channels(); ++j) {
733 if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
734 dcp_mapped->accumulate_channel (
735 content_audio.audio.get(),
737 static_cast<dcp::Channel> (j),
738 map.get (i, static_cast<dcp::Channel> (j))
744 content_audio.audio = dcp_mapped;
748 if (_audio_processor) {
749 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
754 _audio_merger.push (content_audio.audio, time);
755 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
756 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
760 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
762 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
764 shared_ptr<Piece> piece = wp.lock ();
769 shared_ptr<AudioContent> content = piece->content->audio;
770 DCPOMATIC_ASSERT (content);
773 if (stream->frame_rate() != content->resampled_frame_rate()) {
774 shared_ptr<Resampler> r = resampler (content, stream, true);
775 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->run (content_audio.audio, content_audio.frame);
776 if (ro.first->frames() == 0) {
779 content_audio.audio = ro.first;
780 content_audio.frame = ro.second;
783 /* Compute time in the DCP */
784 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
785 /* And the end of this block in the DCP */
786 DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate());
788 /* Remove anything that comes before the start or after the end of the content */
789 if (time < piece->content->position()) {
790 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
792 /* This audio is entirely discarded */
795 content_audio.audio = cut.first;
797 } else if (time > piece->content->end()) {
800 } else if (end > piece->content->end()) {
801 Frame const remaining_frames = DCPTime(piece->content->end() - time).frames_round(_film->audio_frame_rate());
802 DCPOMATIC_ASSERT (remaining_frames > 0);
803 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
804 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
805 content_audio.audio = cut;
808 audio_transform (content, stream, content_audio, time);
812 Player::image_subtitle_start (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
814 shared_ptr<Piece> piece = wp.lock ();
819 /* Apply content's subtitle offsets */
820 subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
821 subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
823 /* Apply content's subtitle scale */
824 subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
825 subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
827 /* Apply a corrective translation to keep the subtitle centred after that scale */
828 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * (piece->content->subtitle->x_scale() - 1);
829 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * (piece->content->subtitle->y_scale() - 1);
832 ps.image.push_back (subtitle.sub);
833 DCPTime from (content_time_to_dcp (piece, subtitle.from()));
835 _active_subtitles[wp] = ActiveSubtitles (ps, from);
839 Player::text_subtitle_start (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
841 shared_ptr<Piece> piece = wp.lock ();
847 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
849 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
850 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
851 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
852 float const xs = piece->content->subtitle->x_scale();
853 float const ys = piece->content->subtitle->y_scale();
854 float size = s.size();
856 /* Adjust size to express the common part of the scaling;
857 e.g. if xs = ys = 0.5 we scale size by 2.
859 if (xs > 1e-5 && ys > 1e-5) {
860 size *= 1 / min (1 / xs, 1 / ys);
864 /* Then express aspect ratio changes */
865 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
866 s.set_aspect_adjust (xs / ys);
869 s.set_in (dcp::Time(from.seconds(), 1000));
870 ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
871 ps.add_fonts (piece->content->subtitle->fonts ());
874 _active_subtitles[wp] = ActiveSubtitles (ps, from);
878 Player::subtitle_stop (weak_ptr<Piece> wp, ContentTime to)
880 if (_active_subtitles.find (wp) == _active_subtitles.end ()) {
884 shared_ptr<Piece> piece = wp.lock ();
889 DCPTime const dcp_to = content_time_to_dcp (piece, to);
891 if (piece->content->subtitle->use() && !_always_burn_subtitles && !piece->content->subtitle->burn()) {
892 Subtitle (_active_subtitles[wp].subs, DCPTimePeriod (_active_subtitles[wp].from, dcp_to));
895 _active_subtitles[wp].to = dcp_to;
899 Player::seek (DCPTime time, bool accurate)
901 if (_audio_processor) {
902 _audio_processor->flush ();
905 for (ResamplerMap::iterator i = _resamplers.begin(); i != _resamplers.end(); ++i) {
910 _audio_merger.clear ();
911 _active_subtitles.clear ();
913 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
914 if (time < i->content->position()) {
915 /* Before; seek to 0 */
916 i->decoder->seek (ContentTime(), accurate);
918 } else if (i->content->position() <= time && time < i->content->end()) {
919 /* During; seek to position */
920 i->decoder->seek (dcp_to_content_time (i, time), accurate);
923 /* After; this piece is done */
929 _last_video_time = time;
930 _last_audio_time = time;
932 _last_video_time = optional<DCPTime> ();
933 _last_audio_time = optional<DCPTime> ();
937 shared_ptr<Resampler>
938 Player::resampler (shared_ptr<const AudioContent> content, AudioStreamPtr stream, bool create)
940 ResamplerMap::const_iterator i = _resamplers.find (make_pair (content, stream));
941 if (i != _resamplers.end ()) {
946 return shared_ptr<Resampler> ();
950 "Creating new resampler from %1 to %2 with %3 channels",
951 stream->frame_rate(),
952 content->resampled_frame_rate(),
956 shared_ptr<Resampler> r (
957 new Resampler (stream->frame_rate(), content->resampled_frame_rate(), stream->channels())
960 _resamplers[make_pair(content, stream)] = r;
965 Player::fill_video (DCPTimePeriod period)
967 /* XXX: this may not work for 3D */
968 BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_video)) {
969 for (DCPTime j = i.from; j < i.to; j += one_video_frame()) {
970 if (_playlist->video_content_at(j) && _last_video) {
971 Video (shared_ptr<PlayerVideo> (new PlayerVideo (*_last_video)), j);
973 Video (black_player_video_frame(), j);
980 Player::fill_audio (DCPTimePeriod period)
982 BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_audio)) {
985 DCPTime block = min (DCPTime::from_seconds (0.5), i.to - t);
986 Frame const samples = block.frames_round(_film->audio_frame_rate());
988 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
989 silence->make_silent ();
998 Player::one_video_frame () const
1000 return DCPTime::from_frames (1, _film->video_frame_rate ());
1003 pair<shared_ptr<AudioBuffers>, DCPTime>
1004 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1006 DCPTime const discard_time = discard_to - time;
1007 Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1008 Frame remaining_frames = audio->frames() - discard_frames;
1009 if (remaining_frames <= 0) {
1010 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1012 shared_ptr<AudioBuffers> cut (new AudioBuffers (audio->channels(), remaining_frames));
1013 cut->copy_from (audio.get(), remaining_frames, discard_frames, 0);
1014 return make_pair(cut, time + discard_time);