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 ();
510 list<shared_ptr<Piece> >
511 Player::overlaps (DCPTime from, DCPTime to, boost::function<bool (Content *)> valid)
513 if (!_have_valid_pieces) {
517 list<shared_ptr<Piece> > overlaps;
518 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
519 if (valid (i->content.get ()) && i->content->position() < to && i->content->end() > from) {
520 overlaps.push_back (i);
530 if (!_have_valid_pieces) {
534 shared_ptr<Piece> earliest;
535 DCPTime earliest_content;
537 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
539 DCPTime const t = i->content->position() + DCPTime (i->decoder->position(), i->frc);
540 if (!earliest || t < earliest_content) {
541 earliest_content = t;
548 /* No more content; fill up with silent black */
549 DCPTimePeriod remaining_video (DCPTime(), _playlist->length());
550 if (_last_video_time) {
551 remaining_video.from = _last_video_time.get();
553 fill_video (remaining_video);
554 DCPTimePeriod remaining_audio (DCPTime(), _playlist->length());
555 if (_last_audio_time) {
556 remaining_audio.from = _last_audio_time.get();
558 fill_audio (remaining_audio);
562 earliest->done = earliest->decoder->pass ();
563 if (earliest->done && earliest->content->audio) {
564 /* Flush the Player audio system for this piece */
565 BOOST_FOREACH (AudioStreamPtr i, earliest->content->audio->streams()) {
566 audio_flush (earliest, i);
570 /* Emit any audio that is ready */
572 DCPTime pull_from = _playlist->length ();
573 for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
574 if (!i->second.piece->done && i->second.last_push_end < pull_from) {
575 pull_from = i->second.last_push_end;
579 list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_from);
580 for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
581 if (_last_audio_time && i->second < _last_audio_time.get()) {
582 /* There has been an accurate seek and we have received some audio before the seek time;
585 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
592 if (_last_audio_time) {
593 fill_audio (DCPTimePeriod (_last_audio_time.get(), i->second));
596 Audio (i->first, i->second);
597 _last_audio_time = i->second + DCPTime::from_frames(i->first->frames(), _film->audio_frame_rate());
604 Player::video (weak_ptr<Piece> wp, ContentVideo video)
606 shared_ptr<Piece> piece = wp.lock ();
611 FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
612 if (frc.skip && (video.frame % 2) == 1) {
616 /* Time and period of the frame we will emit */
617 DCPTime const time = content_video_to_dcp (piece, video.frame);
618 DCPTimePeriod const period (time, time + one_video_frame());
620 /* Discard if it's outside the content's period or if it's before the last accurate seek */
621 if (time < piece->content->position() || time >= piece->content->end() || (_last_video_time && time < _last_video_time)) {
625 /* Get any subtitles */
627 optional<PositionImage> subtitles;
629 for (ActiveSubtitlesMap::const_iterator i = _active_subtitles.begin(); i != _active_subtitles.end(); ++i) {
631 shared_ptr<Piece> sub_piece = i->first.lock ();
636 if (!sub_piece->content->subtitle->use() || (!_always_burn_subtitles && !piece->content->subtitle->burn())) {
640 ActiveSubtitles sub = i->second;
642 if (sub.from > time || (sub.to && sub.to.get() <= time)) {
646 list<PositionImage> sub_images;
648 /* Image subtitles */
649 list<PositionImage> c = transform_image_subtitles (sub.subs.image);
650 copy (c.begin(), c.end(), back_inserter (sub_images));
652 /* Text subtitles (rendered to an image) */
653 if (!sub.subs.text.empty ()) {
654 list<PositionImage> s = render_subtitles (sub.subs.text, sub.subs.fonts, _video_container_size, time);
655 copy (s.begin (), s.end (), back_inserter (sub_images));
658 if (!sub_images.empty ()) {
659 subtitles = merge (sub_images);
663 /* Fill gaps caused by (the hopefully rare event of) a decoder not emitting contiguous video */
665 if (_last_video_time) {
666 fill_video (DCPTimePeriod (_last_video_time.get(), time));
672 piece->content->video->crop (),
673 piece->content->video->fade (video.frame),
674 piece->content->video->scale().size (
675 piece->content->video, _video_container_size, _film->frame_size ()
677 _video_container_size,
680 piece->content->video->colour_conversion ()
685 _last_video->set_subtitle (subtitles.get ());
688 Video (_last_video, time);
690 _last_video_time = time + one_video_frame ();
692 /* Clear any finished _active_subtitles */
693 ActiveSubtitlesMap updated;
694 for (ActiveSubtitlesMap::const_iterator i = _active_subtitles.begin(); i != _active_subtitles.end(); ++i) {
695 if (!i->second.to || i->second.to.get() >= time) {
696 updated[i->first] = i->second;
699 _active_subtitles = updated;
703 Player::audio_flush (shared_ptr<Piece> piece, AudioStreamPtr stream)
705 shared_ptr<AudioContent> content = piece->content->audio;
706 DCPOMATIC_ASSERT (content);
708 shared_ptr<Resampler> r = resampler (content, stream, false);
713 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->flush ();
714 if (ro.first->frames() == 0) {
718 ContentAudio content_audio;
719 content_audio.audio = ro.first;
720 content_audio.frame = ro.second;
722 /* Compute time in the DCP */
723 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
725 audio_transform (content, stream, content_audio, time);
728 /** Do our common processing on some audio */
730 Player::audio_transform (shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time)
732 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
736 if (content->gain() != 0) {
737 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
738 gain->apply_gain (content->gain ());
739 content_audio.audio = gain;
744 shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), content_audio.audio->frames()));
745 dcp_mapped->make_silent ();
747 AudioMapping map = stream->mapping ();
748 for (int i = 0; i < map.input_channels(); ++i) {
749 for (int j = 0; j < dcp_mapped->channels(); ++j) {
750 if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
751 dcp_mapped->accumulate_channel (
752 content_audio.audio.get(),
754 static_cast<dcp::Channel> (j),
755 map.get (i, static_cast<dcp::Channel> (j))
761 content_audio.audio = dcp_mapped;
765 if (_audio_processor) {
766 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
771 _audio_merger.push (content_audio.audio, time);
772 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
773 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
777 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
779 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
781 shared_ptr<Piece> piece = wp.lock ();
786 shared_ptr<AudioContent> content = piece->content->audio;
787 DCPOMATIC_ASSERT (content);
790 if (stream->frame_rate() != content->resampled_frame_rate()) {
791 shared_ptr<Resampler> r = resampler (content, stream, true);
792 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->run (content_audio.audio, content_audio.frame);
793 if (ro.first->frames() == 0) {
796 content_audio.audio = ro.first;
797 content_audio.frame = ro.second;
800 /* Compute time in the DCP */
801 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
802 /* And the end of this block in the DCP */
803 DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate());
805 /* Remove anything that comes before the start or after the end of the content */
806 if (time < piece->content->position()) {
807 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
809 /* This audio is entirely discarded */
812 content_audio.audio = cut.first;
814 } else if (time > piece->content->end()) {
817 } else if (end > piece->content->end()) {
818 Frame const remaining_frames = DCPTime(piece->content->end() - time).frames_round(_film->audio_frame_rate());
819 DCPOMATIC_ASSERT (remaining_frames > 0);
820 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
821 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
822 content_audio.audio = cut;
825 audio_transform (content, stream, content_audio, time);
829 Player::image_subtitle_start (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
831 shared_ptr<Piece> piece = wp.lock ();
836 /* Apply content's subtitle offsets */
837 subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
838 subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
840 /* Apply content's subtitle scale */
841 subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
842 subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
844 /* Apply a corrective translation to keep the subtitle centred after that scale */
845 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * (piece->content->subtitle->x_scale() - 1);
846 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * (piece->content->subtitle->y_scale() - 1);
849 ps.image.push_back (subtitle.sub);
850 DCPTime from (content_time_to_dcp (piece, subtitle.from()));
852 _active_subtitles[wp] = ActiveSubtitles (ps, from);
856 Player::text_subtitle_start (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
858 shared_ptr<Piece> piece = wp.lock ();
864 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
866 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
867 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
868 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
869 float const xs = piece->content->subtitle->x_scale();
870 float const ys = piece->content->subtitle->y_scale();
871 float size = s.size();
873 /* Adjust size to express the common part of the scaling;
874 e.g. if xs = ys = 0.5 we scale size by 2.
876 if (xs > 1e-5 && ys > 1e-5) {
877 size *= 1 / min (1 / xs, 1 / ys);
881 /* Then express aspect ratio changes */
882 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
883 s.set_aspect_adjust (xs / ys);
886 s.set_in (dcp::Time(from.seconds(), 1000));
887 ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
888 ps.add_fonts (piece->content->subtitle->fonts ());
891 _active_subtitles[wp] = ActiveSubtitles (ps, from);
895 Player::subtitle_stop (weak_ptr<Piece> wp, ContentTime to)
897 if (_active_subtitles.find (wp) == _active_subtitles.end ()) {
901 shared_ptr<Piece> piece = wp.lock ();
906 DCPTime const dcp_to = content_time_to_dcp (piece, to);
908 if (piece->content->subtitle->use() && !_always_burn_subtitles && !piece->content->subtitle->burn()) {
909 Subtitle (_active_subtitles[wp].subs, DCPTimePeriod (_active_subtitles[wp].from, dcp_to));
912 _active_subtitles[wp].to = dcp_to;
916 Player::seek (DCPTime time, bool accurate)
918 if (_audio_processor) {
919 _audio_processor->flush ();
922 for (ResamplerMap::iterator i = _resamplers.begin(); i != _resamplers.end(); ++i) {
927 _audio_merger.clear ();
928 _active_subtitles.clear ();
930 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
931 if (time < i->content->position()) {
932 /* Before; seek to 0 */
933 i->decoder->seek (ContentTime(), accurate);
935 } else if (i->content->position() <= time && time < i->content->end()) {
936 /* During; seek to position */
937 i->decoder->seek (dcp_to_content_time (i, time), accurate);
940 /* After; this piece is done */
946 _last_video_time = time;
947 _last_audio_time = time;
949 _last_video_time = optional<DCPTime> ();
950 _last_audio_time = optional<DCPTime> ();
954 shared_ptr<Resampler>
955 Player::resampler (shared_ptr<const AudioContent> content, AudioStreamPtr stream, bool create)
957 ResamplerMap::const_iterator i = _resamplers.find (make_pair (content, stream));
958 if (i != _resamplers.end ()) {
963 return shared_ptr<Resampler> ();
967 "Creating new resampler from %1 to %2 with %3 channels",
968 stream->frame_rate(),
969 content->resampled_frame_rate(),
973 shared_ptr<Resampler> r (
974 new Resampler (stream->frame_rate(), content->resampled_frame_rate(), stream->channels())
977 _resamplers[make_pair(content, stream)] = r;
982 Player::fill_video (DCPTimePeriod period)
984 /* XXX: this may not work for 3D */
985 BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_video)) {
986 for (DCPTime j = i.from; j < i.to; j += one_video_frame()) {
987 if (_playlist->video_content_at(j) && _last_video) {
988 Video (shared_ptr<PlayerVideo> (new PlayerVideo (*_last_video)), j);
990 Video (black_player_video_frame(), j);
997 Player::fill_audio (DCPTimePeriod period)
999 BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_audio)) {
1002 DCPTime block = min (DCPTime::from_seconds (0.5), i.to - t);
1003 Frame const samples = block.frames_round(_film->audio_frame_rate());
1005 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
1006 silence->make_silent ();
1015 Player::one_video_frame () const
1017 return DCPTime::from_frames (1, _film->video_frame_rate ());
1020 pair<shared_ptr<AudioBuffers>, DCPTime>
1021 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1023 DCPTime const discard_time = discard_to - time;
1024 Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1025 Frame remaining_frames = audio->frames() - discard_frames;
1026 if (remaining_frames <= 0) {
1027 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1029 shared_ptr<AudioBuffers> cut (new AudioBuffers (audio->channels(), remaining_frames));
1030 cut->copy_from (audio.get(), remaining_frames, discard_frames, 0);
1031 return make_pair(cut, time + discard_time);