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 earliest->done = earliest->decoder->pass ();
532 if (earliest->done && earliest->content->audio) {
533 /* Flush the Player audio system for this piece */
534 BOOST_FOREACH (AudioStreamPtr i, earliest->content->audio->streams()) {
535 audio_flush (earliest, i);
540 if (_last_video_time) {
541 fill_video (DCPTimePeriod (_last_video_time.get(), earliest ? earliest_content : _playlist->length()));
542 } else if (_last_seek_time) {
543 fill_video (DCPTimePeriod (_last_seek_time.get(), _last_seek_time.get() + one_video_frame ()));
546 /* XXX: fill audio */
552 /* Emit any audio that is ready */
554 DCPTime pull_from = _playlist->length ();
555 for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
556 if (!i->second.piece->done && i->second.last_push_end < pull_from) {
557 pull_from = i->second.last_push_end;
561 list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_from);
562 for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
563 if (_last_audio_time && i->second < _last_audio_time.get()) {
564 /* There has been an accurate seek and we have received some audio before the seek time;
567 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
574 if (_last_audio_time) {
575 /* XXX: does this remain necessary? */
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());
586 optional<PositionImage>
587 Player::subtitles_for_frame (DCPTime time) const
589 /* Get any subtitles */
591 optional<PositionImage> subtitles;
593 for (ActiveSubtitlesMap::const_iterator i = _active_subtitles.begin(); i != _active_subtitles.end(); ++i) {
595 shared_ptr<Piece> sub_piece = i->first.lock ();
600 if (!sub_piece->content->subtitle->use() || (!_always_burn_subtitles && !sub_piece->content->subtitle->burn())) {
604 BOOST_FOREACH (ActiveSubtitles j, i->second) {
606 if (j.from > time || (j.to && j.to.get() <= time)) {
610 list<PositionImage> sub_images;
612 /* Image subtitles */
613 list<PositionImage> c = transform_image_subtitles (j.subs.image);
614 copy (c.begin(), c.end(), back_inserter (sub_images));
616 /* Text subtitles (rendered to an image) */
617 if (!j.subs.text.empty ()) {
618 list<PositionImage> s = render_subtitles (j.subs.text, j.subs.fonts, _video_container_size, time);
619 copy (s.begin (), s.end (), back_inserter (sub_images));
622 if (!sub_images.empty ()) {
623 subtitles = merge (sub_images);
632 Player::video (weak_ptr<Piece> wp, ContentVideo video)
634 shared_ptr<Piece> piece = wp.lock ();
639 FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
640 if (frc.skip && (video.frame % 2) == 1) {
644 /* Time and period of the frame we will emit */
645 DCPTime const time = content_video_to_dcp (piece, video.frame);
646 DCPTimePeriod const period (time, time + one_video_frame());
648 /* Discard if it's outside the content's period or if it's before the last accurate seek */
649 if (time < piece->content->position() || time >= piece->content->end() || (_last_video_time && time < _last_video_time)) {
653 /* Fill gaps caused by (the hopefully rare event of) a decoder not emitting contiguous video */
655 /* XXX: is this necessary? can it be done by the fill in pass? */
656 if (_last_video_time) {
657 fill_video (DCPTimePeriod (_last_video_time.get(), time));
663 piece->content->video->crop (),
664 piece->content->video->fade (video.frame),
665 piece->content->video->scale().size (
666 piece->content->video, _video_container_size, _film->frame_size ()
668 _video_container_size,
671 piece->content->video->colour_conversion ()
675 optional<PositionImage> subtitles = subtitles_for_frame (time);
677 _last_video->set_subtitle (subtitles.get ());
680 Video (_last_video, time);
682 _last_video_time = time + one_video_frame ();
684 /* Clear any finished _active_subtitles */
685 ActiveSubtitlesMap updated;
686 for (ActiveSubtitlesMap::const_iterator i = _active_subtitles.begin(); i != _active_subtitles.end(); ++i) {
687 list<ActiveSubtitles> as;
688 BOOST_FOREACH (ActiveSubtitles j, i->second) {
689 if (!j.to || j.to.get() >= time) {
694 updated[i->first] = as;
697 _active_subtitles = updated;
701 Player::audio_flush (shared_ptr<Piece> piece, AudioStreamPtr stream)
703 shared_ptr<AudioContent> content = piece->content->audio;
704 DCPOMATIC_ASSERT (content);
706 shared_ptr<Resampler> r = resampler (content, stream, false);
711 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->flush ();
712 if (ro.first->frames() == 0) {
716 ContentAudio content_audio;
717 content_audio.audio = ro.first;
718 content_audio.frame = ro.second;
720 /* Compute time in the DCP */
721 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
723 audio_transform (content, stream, content_audio, time);
726 /** Do our common processing on some audio */
728 Player::audio_transform (shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time)
730 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
734 if (content->gain() != 0) {
735 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
736 gain->apply_gain (content->gain ());
737 content_audio.audio = gain;
742 shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), content_audio.audio->frames()));
743 dcp_mapped->make_silent ();
745 AudioMapping map = stream->mapping ();
746 for (int i = 0; i < map.input_channels(); ++i) {
747 for (int j = 0; j < dcp_mapped->channels(); ++j) {
748 if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
749 dcp_mapped->accumulate_channel (
750 content_audio.audio.get(),
752 static_cast<dcp::Channel> (j),
753 map.get (i, static_cast<dcp::Channel> (j))
759 content_audio.audio = dcp_mapped;
763 if (_audio_processor) {
764 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
769 _audio_merger.push (content_audio.audio, time);
770 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
771 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
775 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
777 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
779 shared_ptr<Piece> piece = wp.lock ();
784 shared_ptr<AudioContent> content = piece->content->audio;
785 DCPOMATIC_ASSERT (content);
788 if (stream->frame_rate() != content->resampled_frame_rate()) {
789 shared_ptr<Resampler> r = resampler (content, stream, true);
790 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->run (content_audio.audio, content_audio.frame);
791 if (ro.first->frames() == 0) {
794 content_audio.audio = ro.first;
795 content_audio.frame = ro.second;
798 /* Compute time in the DCP */
799 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
800 /* And the end of this block in the DCP */
801 DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate());
803 /* Remove anything that comes before the start or after the end of the content */
804 if (time < piece->content->position()) {
805 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
807 /* This audio is entirely discarded */
810 content_audio.audio = cut.first;
812 } else if (time > piece->content->end()) {
815 } else if (end > piece->content->end()) {
816 Frame const remaining_frames = DCPTime(piece->content->end() - time).frames_round(_film->audio_frame_rate());
817 DCPOMATIC_ASSERT (remaining_frames > 0);
818 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
819 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
820 content_audio.audio = cut;
823 audio_transform (content, stream, content_audio, time);
827 Player::image_subtitle_start (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
829 shared_ptr<Piece> piece = wp.lock ();
834 /* Apply content's subtitle offsets */
835 subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
836 subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
838 /* Apply content's subtitle scale */
839 subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
840 subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
842 /* Apply a corrective translation to keep the subtitle centred after that scale */
843 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * (piece->content->subtitle->x_scale() - 1);
844 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * (piece->content->subtitle->y_scale() - 1);
847 ps.image.push_back (subtitle.sub);
848 DCPTime from (content_time_to_dcp (piece, subtitle.from()));
850 if (_active_subtitles.find(wp) == _active_subtitles.end()) {
851 _active_subtitles[wp] = list<ActiveSubtitles>();
853 _active_subtitles[wp].push_back (ActiveSubtitles (ps, from));
857 Player::text_subtitle_start (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
859 shared_ptr<Piece> piece = wp.lock ();
865 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
867 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
868 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
869 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
870 float const xs = piece->content->subtitle->x_scale();
871 float const ys = piece->content->subtitle->y_scale();
872 float size = s.size();
874 /* Adjust size to express the common part of the scaling;
875 e.g. if xs = ys = 0.5 we scale size by 2.
877 if (xs > 1e-5 && ys > 1e-5) {
878 size *= 1 / min (1 / xs, 1 / ys);
882 /* Then express aspect ratio changes */
883 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
884 s.set_aspect_adjust (xs / ys);
887 s.set_in (dcp::Time(from.seconds(), 1000));
888 ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
889 ps.add_fonts (piece->content->subtitle->fonts ());
892 if (_active_subtitles.find(wp) == _active_subtitles.end()) {
893 _active_subtitles[wp] = list<ActiveSubtitles> ();
895 _active_subtitles[wp].push_back (ActiveSubtitles (ps, from));
899 Player::subtitle_stop (weak_ptr<Piece> wp, ContentTime to)
901 if (_active_subtitles.find (wp) == _active_subtitles.end ()) {
905 shared_ptr<Piece> piece = wp.lock ();
910 DCPTime const dcp_to = content_time_to_dcp (piece, to);
912 if (piece->content->subtitle->use() && !_always_burn_subtitles && !piece->content->subtitle->burn()) {
913 Subtitle (_active_subtitles[wp].back().subs, DCPTimePeriod (_active_subtitles[wp].back().from, dcp_to));
916 _active_subtitles[wp].back().to = dcp_to;
918 BOOST_FOREACH (SubtitleString& i, _active_subtitles[wp].back().subs.text) {
919 i.set_out (dcp::Time(dcp_to.seconds(), 1000));
924 Player::seek (DCPTime time, bool accurate)
926 if (_audio_processor) {
927 _audio_processor->flush ();
930 for (ResamplerMap::iterator i = _resamplers.begin(); i != _resamplers.end(); ++i) {
935 _audio_merger.clear ();
936 _active_subtitles.clear ();
938 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
939 if (time < i->content->position()) {
940 /* Before; seek to 0 */
941 i->decoder->seek (ContentTime(), accurate);
943 } else if (i->content->position() <= time && time < i->content->end()) {
944 /* During; seek to position */
945 i->decoder->seek (dcp_to_content_time (i, time), accurate);
948 /* After; this piece is done */
954 _last_video_time = time;
955 _last_audio_time = time;
957 _last_video_time = optional<DCPTime> ();
958 _last_audio_time = optional<DCPTime> ();
961 _last_seek_time = time;
964 shared_ptr<Resampler>
965 Player::resampler (shared_ptr<const AudioContent> content, AudioStreamPtr stream, bool create)
967 ResamplerMap::const_iterator i = _resamplers.find (make_pair (content, stream));
968 if (i != _resamplers.end ()) {
973 return shared_ptr<Resampler> ();
977 "Creating new resampler from %1 to %2 with %3 channels",
978 stream->frame_rate(),
979 content->resampled_frame_rate(),
983 shared_ptr<Resampler> r (
984 new Resampler (stream->frame_rate(), content->resampled_frame_rate(), stream->channels())
987 _resamplers[make_pair(content, stream)] = r;
992 Player::fill_video (DCPTimePeriod period)
994 /* XXX: this may not work for 3D */
995 BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_video)) {
996 for (DCPTime j = i.from; j < i.to; j += one_video_frame()) {
997 if (_playlist->video_content_at(j) && _last_video) {
998 Video (shared_ptr<PlayerVideo> (new PlayerVideo (*_last_video)), j);
1000 shared_ptr<PlayerVideo> black = black_player_video_frame ();
1001 optional<PositionImage> subtitles = subtitles_for_frame (j);
1003 black->set_subtitle (subtitles.get ());
1007 _last_video_time = j;
1013 Player::fill_audio (DCPTimePeriod period)
1015 BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_audio)) {
1018 DCPTime block = min (DCPTime::from_seconds (0.5), i.to - t);
1019 Frame const samples = block.frames_round(_film->audio_frame_rate());
1021 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
1022 silence->make_silent ();
1031 Player::one_video_frame () const
1033 return DCPTime::from_frames (1, _film->video_frame_rate ());
1036 pair<shared_ptr<AudioBuffers>, DCPTime>
1037 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1039 DCPTime const discard_time = discard_to - time;
1040 Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1041 Frame remaining_frames = audio->frames() - discard_frames;
1042 if (remaining_frames <= 0) {
1043 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1045 shared_ptr<AudioBuffers> cut (new AudioBuffers (audio->channels(), remaining_frames));
1046 cut->copy_from (audio.get(), remaining_frames, discard_frames, 0);
1047 return make_pair(cut, time + discard_time);