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 = DCPTime ();
175 _last_audio_time = 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 /* Fill towards the next thing that might happen (or the end of the playlist). This is to fill gaps between content,
541 NOT to fill gaps within content (the latter is done in ::video())
543 DCPTime fill_towards = earliest ? earliest_content : _playlist->length();
545 /* Work out where to fill video from */
546 optional<DCPTime> video_fill_from;
547 if (_last_video_time) {
548 /* Fill from the last video or seek time */
549 video_fill_from = _last_video_time;
553 /* Fill some black if we would emit before the earliest piece of content. This is so we act like a phantom
554 Piece which emits black in spaces (we only emit if we are the earliest thing)
556 if (video_fill_from && (!earliest || *video_fill_from < earliest_content) && ((fill_towards - *video_fill_from)) >= one_video_frame()) {
557 list<DCPTimePeriod> p = subtract(DCPTimePeriod(*video_fill_from, *video_fill_from + one_video_frame()), _no_video);
559 emit_video (black_player_video_frame(), p.front().from);
562 } else if (_playlist->length() == DCPTime()) {
563 /* Special case of an empty Film; just give one black frame */
564 emit_video (black_player_video_frame(), DCPTime());
568 optional<DCPTime> audio_fill_from;
569 if (_last_audio_time) {
570 /* Fill from the last audio or seek time */
571 audio_fill_from = _last_audio_time;
575 if (audio_fill_from && audio_fill_from < fill_towards) {
576 DCPTimePeriod period (*audio_fill_from, fill_towards);
577 if (period.duration() > one_video_frame()) {
578 period.to = period.from + one_video_frame();
580 list<DCPTimePeriod> p = subtract(period, _no_video);
587 /* Emit any audio that is ready */
589 DCPTime pull_to = _playlist->length ();
590 for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
591 if (!i->second.piece->done && i->second.last_push_end < pull_to) {
592 pull_to = i->second.last_push_end;
596 list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_to);
597 for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
598 if (_last_audio_time && i->second < *_last_audio_time) {
599 /* There has been an accurate seek and we have received some audio before the seek time;
602 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
609 if (_last_audio_time) {
610 fill_audio (DCPTimePeriod (*_last_audio_time, i->second));
613 emit_audio (i->first, i->second);
616 return !earliest && !filled;
619 optional<PositionImage>
620 Player::subtitles_for_frame (DCPTime time) const
622 list<PositionImage> subtitles;
624 BOOST_FOREACH (PlayerSubtitles i, _active_subtitles.get_burnt (time, _always_burn_subtitles)) {
626 /* Image subtitles */
627 list<PositionImage> c = transform_image_subtitles (i.image);
628 copy (c.begin(), c.end(), back_inserter (subtitles));
630 /* Text subtitles (rendered to an image) */
631 if (!i.text.empty ()) {
632 list<PositionImage> s = render_subtitles (i.text, i.fonts, _video_container_size, time);
633 copy (s.begin(), s.end(), back_inserter (subtitles));
637 if (subtitles.empty ()) {
638 return optional<PositionImage> ();
641 return merge (subtitles);
645 Player::video (weak_ptr<Piece> wp, ContentVideo video)
647 shared_ptr<Piece> piece = wp.lock ();
652 FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
653 if (frc.skip && (video.frame % 2) == 1) {
657 /* Time and period of the frame we will emit */
658 DCPTime const time = content_video_to_dcp (piece, video.frame);
659 DCPTimePeriod const period (time, time + one_video_frame());
661 /* Discard if it's outside the content's period or if it's before the last accurate seek */
663 time < piece->content->position() ||
664 time >= piece->content->end() ||
665 (_last_video_time && time < *_last_video_time)) {
669 /* Fill gaps that we discover now that we have some video which needs to be emitted */
671 optional<DCPTime> fill_to;
672 if (_last_video_time) {
673 fill_to = _last_video_time;
677 /* XXX: this may not work for 3D */
678 BOOST_FOREACH (DCPTimePeriod i, subtract(DCPTimePeriod (*fill_to, time), _no_video)) {
679 for (DCPTime j = i.from; j < i.to; j += one_video_frame()) {
680 LastVideoMap::const_iterator k = _last_video.find (wp);
681 if (k != _last_video.end ()) {
682 emit_video (k->second, j);
684 emit_video (black_player_video_frame(), j);
690 _last_video[wp].reset (
693 piece->content->video->crop (),
694 piece->content->video->fade (video.frame),
695 piece->content->video->scale().size (
696 piece->content->video, _video_container_size, _film->frame_size ()
698 _video_container_size,
701 piece->content->video->colour_conversion ()
705 emit_video (_last_video[wp], time);
709 Player::audio_flush (shared_ptr<Piece> piece, AudioStreamPtr stream)
711 shared_ptr<AudioContent> content = piece->content->audio;
712 DCPOMATIC_ASSERT (content);
714 shared_ptr<Resampler> r = resampler (content, stream, false);
719 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->flush ();
720 if (ro.first->frames() == 0) {
724 ContentAudio content_audio;
725 content_audio.audio = ro.first;
726 content_audio.frame = ro.second;
728 /* Compute time in the DCP */
729 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
731 audio_transform (content, stream, content_audio, time);
734 /** Do our common processing on some audio */
736 Player::audio_transform (shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time)
738 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
742 if (content->gain() != 0) {
743 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
744 gain->apply_gain (content->gain ());
745 content_audio.audio = gain;
750 shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), content_audio.audio->frames()));
751 dcp_mapped->make_silent ();
753 AudioMapping map = stream->mapping ();
754 for (int i = 0; i < map.input_channels(); ++i) {
755 for (int j = 0; j < dcp_mapped->channels(); ++j) {
756 if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
757 dcp_mapped->accumulate_channel (
758 content_audio.audio.get(),
760 static_cast<dcp::Channel> (j),
761 map.get (i, static_cast<dcp::Channel> (j))
767 content_audio.audio = dcp_mapped;
771 if (_audio_processor) {
772 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
775 /* Pad any gap which may be caused by audio delay */
777 if (_last_audio_time) {
778 fill_audio (DCPTimePeriod (*_last_audio_time, time));
783 _audio_merger.push (content_audio.audio, time);
784 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
785 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
789 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
791 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
793 shared_ptr<Piece> piece = wp.lock ();
798 shared_ptr<AudioContent> content = piece->content->audio;
799 DCPOMATIC_ASSERT (content);
802 if (stream->frame_rate() != content->resampled_frame_rate()) {
803 shared_ptr<Resampler> r = resampler (content, stream, true);
804 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->run (content_audio.audio, content_audio.frame);
805 if (ro.first->frames() == 0) {
808 content_audio.audio = ro.first;
809 content_audio.frame = ro.second;
812 /* Compute time in the DCP */
813 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
814 /* And the end of this block in the DCP */
815 DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate());
817 /* Remove anything that comes before the start or after the end of the content */
818 if (time < piece->content->position()) {
819 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
821 /* This audio is entirely discarded */
824 content_audio.audio = cut.first;
826 } else if (time > piece->content->end()) {
829 } else if (end > piece->content->end()) {
830 Frame const remaining_frames = DCPTime(piece->content->end() - time).frames_round(_film->audio_frame_rate());
831 if (remaining_frames == 0) {
834 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
835 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
836 content_audio.audio = cut;
839 audio_transform (content, stream, content_audio, time);
843 Player::image_subtitle_start (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
845 shared_ptr<Piece> piece = wp.lock ();
850 /* Apply content's subtitle offsets */
851 subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
852 subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
854 /* Apply content's subtitle scale */
855 subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
856 subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
858 /* Apply a corrective translation to keep the subtitle centred after that scale */
859 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * (piece->content->subtitle->x_scale() - 1);
860 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * (piece->content->subtitle->y_scale() - 1);
863 ps.image.push_back (subtitle.sub);
864 DCPTime from (content_time_to_dcp (piece, subtitle.from()));
866 _active_subtitles.add_from (wp, ps, from);
870 Player::text_subtitle_start (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
872 shared_ptr<Piece> piece = wp.lock ();
878 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
880 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
881 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
882 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
883 float const xs = piece->content->subtitle->x_scale();
884 float const ys = piece->content->subtitle->y_scale();
885 float size = s.size();
887 /* Adjust size to express the common part of the scaling;
888 e.g. if xs = ys = 0.5 we scale size by 2.
890 if (xs > 1e-5 && ys > 1e-5) {
891 size *= 1 / min (1 / xs, 1 / ys);
895 /* Then express aspect ratio changes */
896 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
897 s.set_aspect_adjust (xs / ys);
900 s.set_in (dcp::Time(from.seconds(), 1000));
901 ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
902 ps.add_fonts (piece->content->subtitle->fonts ());
905 _active_subtitles.add_from (wp, ps, from);
909 Player::subtitle_stop (weak_ptr<Piece> wp, ContentTime to)
911 if (!_active_subtitles.have (wp)) {
915 shared_ptr<Piece> piece = wp.lock ();
920 DCPTime const dcp_to = content_time_to_dcp (piece, to);
922 pair<PlayerSubtitles, DCPTime> from = _active_subtitles.add_to (wp, dcp_to);
924 if (piece->content->subtitle->use() && !_always_burn_subtitles && !piece->content->subtitle->burn()) {
925 Subtitle (from.first, DCPTimePeriod (from.second, dcp_to));
930 Player::seek (DCPTime time, bool accurate)
932 if (_audio_processor) {
933 _audio_processor->flush ();
936 for (ResamplerMap::iterator i = _resamplers.begin(); i != _resamplers.end(); ++i) {
941 _audio_merger.clear ();
942 _active_subtitles.clear ();
944 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
945 if (time < i->content->position()) {
946 /* Before; seek to 0 */
947 i->decoder->seek (ContentTime(), accurate);
949 } else if (i->content->position() <= time && time < i->content->end()) {
950 /* During; seek to position */
951 i->decoder->seek (dcp_to_content_time (i, time), accurate);
954 /* After; this piece is done */
960 _last_video_time = time;
961 _last_audio_time = time;
963 _last_video_time = optional<DCPTime>();
964 _last_audio_time = optional<DCPTime>();
968 shared_ptr<Resampler>
969 Player::resampler (shared_ptr<const AudioContent> content, AudioStreamPtr stream, bool create)
971 ResamplerMap::const_iterator i = _resamplers.find (make_pair (content, stream));
972 if (i != _resamplers.end ()) {
977 return shared_ptr<Resampler> ();
981 "Creating new resampler from %1 to %2 with %3 channels",
982 stream->frame_rate(),
983 content->resampled_frame_rate(),
987 shared_ptr<Resampler> r (
988 new Resampler (stream->frame_rate(), content->resampled_frame_rate(), stream->channels())
991 _resamplers[make_pair(content, stream)] = r;
996 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
998 optional<PositionImage> subtitles = subtitles_for_frame (time);
1000 pv->set_subtitle (subtitles.get ());
1005 if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
1006 _last_video_time = time + one_video_frame();
1007 _active_subtitles.clear_before (time);
1012 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1015 _last_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate ());
1019 Player::fill_audio (DCPTimePeriod period)
1021 BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_audio)) {
1024 DCPTime block = min (DCPTime::from_seconds (0.5), i.to - t);
1025 Frame const samples = block.frames_round(_film->audio_frame_rate());
1027 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
1028 silence->make_silent ();
1029 emit_audio (silence, t);
1037 Player::one_video_frame () const
1039 return DCPTime::from_frames (1, _film->video_frame_rate ());
1042 pair<shared_ptr<AudioBuffers>, DCPTime>
1043 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1045 DCPTime const discard_time = discard_to - time;
1046 Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1047 Frame remaining_frames = audio->frames() - discard_frames;
1048 if (remaining_frames <= 0) {
1049 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1051 shared_ptr<AudioBuffers> cut (new AudioBuffers (audio->channels(), remaining_frames));
1052 cut->copy_from (audio.get(), remaining_frames, discard_frames, 0);
1053 return make_pair(cut, time + discard_time);