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 && !_playlist->video_content_at(*_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 /* XXX: this should take _no_video into account */
557 if (video_fill_from && (!earliest || *video_fill_from < earliest_content) && ((fill_towards - *video_fill_from)) >= one_video_frame()) {
558 emit_video (black_player_video_frame(), *video_fill_from);
560 } else if (_playlist->length() == DCPTime()) {
561 /* Special case of an empty Film; just give one black frame */
562 emit_video (black_player_video_frame(), DCPTime());
566 optional<DCPTime> audio_fill_from;
567 if (_last_audio_time && !_playlist->audio_content_at(*_last_audio_time)) {
568 /* Fill from the last audio or seek time */
569 audio_fill_from = _last_audio_time;
573 if (audio_fill_from && audio_fill_from < fill_towards) {
574 DCPTimePeriod period (*audio_fill_from, fill_towards);
575 if (period.duration() > one_video_frame()) {
576 period.to = period.from + one_video_frame();
582 /* Emit any audio that is ready */
584 DCPTime pull_to = _playlist->length ();
585 for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
586 if (!i->second.piece->done && i->second.last_push_end < pull_to) {
587 pull_to = i->second.last_push_end;
591 list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_to);
592 for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
593 if (_last_audio_time && i->second < *_last_audio_time) {
594 /* There has been an accurate seek and we have received some audio before the seek time;
597 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
604 if (_last_audio_time) {
605 fill_audio (DCPTimePeriod (*_last_audio_time, i->second));
608 emit_audio (i->first, i->second);
611 return !earliest && !filled;
614 optional<PositionImage>
615 Player::subtitles_for_frame (DCPTime time) const
617 list<PositionImage> subtitles;
619 BOOST_FOREACH (PlayerSubtitles i, _active_subtitles.get_burnt (time, _always_burn_subtitles)) {
621 /* Image subtitles */
622 list<PositionImage> c = transform_image_subtitles (i.image);
623 copy (c.begin(), c.end(), back_inserter (subtitles));
625 /* Text subtitles (rendered to an image) */
626 if (!i.text.empty ()) {
627 list<PositionImage> s = render_subtitles (i.text, i.fonts, _video_container_size, time);
628 copy (s.begin(), s.end(), back_inserter (subtitles));
632 if (subtitles.empty ()) {
633 return optional<PositionImage> ();
636 return merge (subtitles);
640 Player::video (weak_ptr<Piece> wp, ContentVideo video)
642 shared_ptr<Piece> piece = wp.lock ();
647 FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
648 if (frc.skip && (video.frame % 2) == 1) {
652 /* Time and period of the frame we will emit */
653 DCPTime const time = content_video_to_dcp (piece, video.frame);
654 DCPTimePeriod const period (time, time + one_video_frame());
656 /* Discard if it's outside the content's period or if it's before the last accurate seek */
658 time < piece->content->position() ||
659 time >= piece->content->end() ||
660 (_last_video_time && time < *_last_video_time)) {
664 /* Fill gaps that we discover now that we have some video which needs to be emitted */
666 optional<DCPTime> fill_to;
667 if (_last_video_time) {
668 fill_to = _last_video_time;
672 /* XXX: this may not work for 3D */
673 BOOST_FOREACH (DCPTimePeriod i, subtract(DCPTimePeriod (*fill_to, time), _no_video)) {
674 for (DCPTime j = i.from; j < i.to; j += one_video_frame()) {
675 LastVideoMap::const_iterator k = _last_video.find (wp);
676 if (k != _last_video.end ()) {
677 emit_video (k->second, j);
679 emit_video (black_player_video_frame(), j);
685 _last_video[wp].reset (
688 piece->content->video->crop (),
689 piece->content->video->fade (video.frame),
690 piece->content->video->scale().size (
691 piece->content->video, _video_container_size, _film->frame_size ()
693 _video_container_size,
696 piece->content->video->colour_conversion ()
700 emit_video (_last_video[wp], time);
704 Player::audio_flush (shared_ptr<Piece> piece, AudioStreamPtr stream)
706 shared_ptr<AudioContent> content = piece->content->audio;
707 DCPOMATIC_ASSERT (content);
709 shared_ptr<Resampler> r = resampler (content, stream, false);
714 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->flush ();
715 if (ro.first->frames() == 0) {
719 ContentAudio content_audio;
720 content_audio.audio = ro.first;
721 content_audio.frame = ro.second;
723 /* Compute time in the DCP */
724 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
726 audio_transform (content, stream, content_audio, time);
729 /** Do our common processing on some audio */
731 Player::audio_transform (shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time)
733 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
737 if (content->gain() != 0) {
738 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
739 gain->apply_gain (content->gain ());
740 content_audio.audio = gain;
745 shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), content_audio.audio->frames()));
746 dcp_mapped->make_silent ();
748 AudioMapping map = stream->mapping ();
749 for (int i = 0; i < map.input_channels(); ++i) {
750 for (int j = 0; j < dcp_mapped->channels(); ++j) {
751 if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
752 dcp_mapped->accumulate_channel (
753 content_audio.audio.get(),
755 static_cast<dcp::Channel> (j),
756 map.get (i, static_cast<dcp::Channel> (j))
762 content_audio.audio = dcp_mapped;
766 if (_audio_processor) {
767 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
772 _audio_merger.push (content_audio.audio, time);
773 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
774 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
778 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
780 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
782 shared_ptr<Piece> piece = wp.lock ();
787 shared_ptr<AudioContent> content = piece->content->audio;
788 DCPOMATIC_ASSERT (content);
791 if (stream->frame_rate() != content->resampled_frame_rate()) {
792 shared_ptr<Resampler> r = resampler (content, stream, true);
793 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->run (content_audio.audio, content_audio.frame);
794 if (ro.first->frames() == 0) {
797 content_audio.audio = ro.first;
798 content_audio.frame = ro.second;
801 /* Compute time in the DCP */
802 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
803 /* And the end of this block in the DCP */
804 DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate());
806 /* Pad any gap which may be caused by audio delay */
807 if (_last_audio_time) {
808 fill_audio (DCPTimePeriod (*_last_audio_time, time));
811 /* Remove anything that comes before the start or after the end of the content */
812 if (time < piece->content->position()) {
813 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
815 /* This audio is entirely discarded */
818 content_audio.audio = cut.first;
820 } else if (time > piece->content->end()) {
823 } else if (end > piece->content->end()) {
824 Frame const remaining_frames = DCPTime(piece->content->end() - time).frames_round(_film->audio_frame_rate());
825 if (remaining_frames == 0) {
828 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
829 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
830 content_audio.audio = cut;
833 audio_transform (content, stream, content_audio, time);
837 Player::image_subtitle_start (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
839 shared_ptr<Piece> piece = wp.lock ();
844 /* Apply content's subtitle offsets */
845 subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
846 subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
848 /* Apply content's subtitle scale */
849 subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
850 subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
852 /* Apply a corrective translation to keep the subtitle centred after that scale */
853 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * (piece->content->subtitle->x_scale() - 1);
854 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * (piece->content->subtitle->y_scale() - 1);
857 ps.image.push_back (subtitle.sub);
858 DCPTime from (content_time_to_dcp (piece, subtitle.from()));
860 _active_subtitles.add_from (wp, ps, from);
864 Player::text_subtitle_start (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
866 shared_ptr<Piece> piece = wp.lock ();
872 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
874 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
875 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
876 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
877 float const xs = piece->content->subtitle->x_scale();
878 float const ys = piece->content->subtitle->y_scale();
879 float size = s.size();
881 /* Adjust size to express the common part of the scaling;
882 e.g. if xs = ys = 0.5 we scale size by 2.
884 if (xs > 1e-5 && ys > 1e-5) {
885 size *= 1 / min (1 / xs, 1 / ys);
889 /* Then express aspect ratio changes */
890 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
891 s.set_aspect_adjust (xs / ys);
894 s.set_in (dcp::Time(from.seconds(), 1000));
895 ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
896 ps.add_fonts (piece->content->subtitle->fonts ());
899 _active_subtitles.add_from (wp, ps, from);
903 Player::subtitle_stop (weak_ptr<Piece> wp, ContentTime to)
905 if (!_active_subtitles.have (wp)) {
909 shared_ptr<Piece> piece = wp.lock ();
914 DCPTime const dcp_to = content_time_to_dcp (piece, to);
916 pair<PlayerSubtitles, DCPTime> from = _active_subtitles.add_to (wp, dcp_to);
918 if (piece->content->subtitle->use() && !_always_burn_subtitles && !piece->content->subtitle->burn()) {
919 Subtitle (from.first, DCPTimePeriod (from.second, dcp_to));
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>();
962 shared_ptr<Resampler>
963 Player::resampler (shared_ptr<const AudioContent> content, AudioStreamPtr stream, bool create)
965 ResamplerMap::const_iterator i = _resamplers.find (make_pair (content, stream));
966 if (i != _resamplers.end ()) {
971 return shared_ptr<Resampler> ();
975 "Creating new resampler from %1 to %2 with %3 channels",
976 stream->frame_rate(),
977 content->resampled_frame_rate(),
981 shared_ptr<Resampler> r (
982 new Resampler (stream->frame_rate(), content->resampled_frame_rate(), stream->channels())
985 _resamplers[make_pair(content, stream)] = r;
990 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
992 optional<PositionImage> subtitles = subtitles_for_frame (time);
994 pv->set_subtitle (subtitles.get ());
997 _last_video_time = time + one_video_frame();
998 _active_subtitles.clear_before (time);
1002 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1005 _last_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate ());
1009 Player::fill_audio (DCPTimePeriod period)
1011 BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_audio)) {
1014 DCPTime block = min (DCPTime::from_seconds (0.5), i.to - t);
1015 Frame const samples = block.frames_round(_film->audio_frame_rate());
1017 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
1018 silence->make_silent ();
1019 emit_audio (silence, t);
1027 Player::one_video_frame () const
1029 return DCPTime::from_frames (1, _film->video_frame_rate ());
1032 pair<shared_ptr<AudioBuffers>, DCPTime>
1033 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1035 DCPTime const discard_time = discard_to - time;
1036 Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1037 Frame remaining_frames = audio->frames() - discard_frames;
1038 if (remaining_frames <= 0) {
1039 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1041 shared_ptr<AudioBuffers> cut (new AudioBuffers (audio->channels(), remaining_frames));
1042 cut->copy_from (audio.get(), remaining_frames, discard_frames, 0);
1043 return make_pair(cut, time + discard_time);