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 , _last_seek_accurate (true)
91 , _audio_merger (_film->audio_frame_rate())
93 _film_changed_connection = _film->Changed.connect (bind (&Player::film_changed, this, _1));
94 _playlist_changed_connection = _playlist->Changed.connect (bind (&Player::playlist_changed, this));
95 _playlist_content_changed_connection = _playlist->ContentChanged.connect (bind (&Player::playlist_content_changed, this, _1, _2, _3));
96 set_video_container_size (_film->frame_size ());
98 film_changed (Film::AUDIO_PROCESSOR);
100 seek (DCPTime (), true);
104 Player::setup_pieces ()
108 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
110 if (!i->paths_valid ()) {
114 shared_ptr<Decoder> decoder = decoder_factory (i, _film->log());
115 FrameRateChange frc (i->active_video_frame_rate(), _film->video_frame_rate());
118 /* Not something that we can decode; e.g. Atmos content */
122 if (decoder->video && _ignore_video) {
123 decoder->video->set_ignore ();
126 if (decoder->audio && _ignore_audio) {
127 decoder->audio->set_ignore ();
130 shared_ptr<DCPDecoder> dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
131 if (dcp && _play_referenced) {
132 dcp->set_decode_referenced ();
135 shared_ptr<Piece> piece (new Piece (i, decoder, frc));
136 _pieces.push_back (piece);
138 if (decoder->video) {
139 decoder->video->Data.connect (bind (&Player::video, this, weak_ptr<Piece> (piece), _1));
142 if (decoder->audio) {
143 decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
146 if (decoder->subtitle) {
147 decoder->subtitle->ImageStart.connect (bind (&Player::image_subtitle_start, this, weak_ptr<Piece> (piece), _1));
148 decoder->subtitle->TextStart.connect (bind (&Player::text_subtitle_start, this, weak_ptr<Piece> (piece), _1));
149 decoder->subtitle->Stop.connect (bind (&Player::subtitle_stop, this, weak_ptr<Piece> (piece), _1));
153 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
154 if (i->content->audio) {
155 BOOST_FOREACH (AudioStreamPtr j, i->content->audio->streams()) {
156 _stream_states[j] = StreamState (i, i->content->position ());
161 if (!_play_referenced) {
162 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
163 shared_ptr<DCPContent> dc = dynamic_pointer_cast<DCPContent> (i->content);
165 if (dc->reference_video()) {
166 _no_video.push_back (DCPTimePeriod (dc->position(), dc->end()));
168 if (dc->reference_audio()) {
169 _no_audio.push_back (DCPTimePeriod (dc->position(), dc->end()));
175 _last_video_time = optional<DCPTime> ();
176 _last_audio_time = optional<DCPTime> ();
177 _have_valid_pieces = true;
181 Player::playlist_content_changed (weak_ptr<Content> w, int property, bool frequent)
183 shared_ptr<Content> c = w.lock ();
189 property == ContentProperty::POSITION ||
190 property == ContentProperty::LENGTH ||
191 property == ContentProperty::TRIM_START ||
192 property == ContentProperty::TRIM_END ||
193 property == ContentProperty::PATH ||
194 property == VideoContentProperty::FRAME_TYPE ||
195 property == DCPContentProperty::NEEDS_ASSETS ||
196 property == DCPContentProperty::NEEDS_KDM ||
197 property == SubtitleContentProperty::COLOUR ||
198 property == SubtitleContentProperty::OUTLINE ||
199 property == SubtitleContentProperty::SHADOW ||
200 property == SubtitleContentProperty::EFFECT_COLOUR ||
201 property == FFmpegContentProperty::SUBTITLE_STREAM ||
202 property == VideoContentProperty::COLOUR_CONVERSION
205 _have_valid_pieces = false;
209 property == SubtitleContentProperty::LINE_SPACING ||
210 property == SubtitleContentProperty::OUTLINE_WIDTH ||
211 property == SubtitleContentProperty::Y_SCALE ||
212 property == SubtitleContentProperty::FADE_IN ||
213 property == SubtitleContentProperty::FADE_OUT ||
214 property == ContentProperty::VIDEO_FRAME_RATE ||
215 property == SubtitleContentProperty::USE ||
216 property == SubtitleContentProperty::X_OFFSET ||
217 property == SubtitleContentProperty::Y_OFFSET ||
218 property == SubtitleContentProperty::X_SCALE ||
219 property == SubtitleContentProperty::FONTS ||
220 property == VideoContentProperty::CROP ||
221 property == VideoContentProperty::SCALE ||
222 property == VideoContentProperty::FADE_IN ||
223 property == VideoContentProperty::FADE_OUT
231 Player::set_video_container_size (dcp::Size s)
233 if (s == _video_container_size) {
237 _video_container_size = s;
239 _black_image.reset (new Image (AV_PIX_FMT_RGB24, _video_container_size, true));
240 _black_image->make_black ();
246 Player::playlist_changed ()
248 _have_valid_pieces = false;
253 Player::film_changed (Film::Property p)
255 /* Here we should notice Film properties that affect our output, and
256 alert listeners that our output now would be different to how it was
257 last time we were run.
260 if (p == Film::CONTAINER) {
262 } else if (p == Film::VIDEO_FRAME_RATE) {
263 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
264 so we need new pieces here.
266 _have_valid_pieces = false;
268 } else if (p == Film::AUDIO_PROCESSOR) {
269 if (_film->audio_processor ()) {
270 _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
276 Player::transform_image_subtitles (list<ImageSubtitle> subs) const
278 list<PositionImage> all;
280 for (list<ImageSubtitle>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
285 /* We will scale the subtitle up to fit _video_container_size */
286 dcp::Size scaled_size (i->rectangle.width * _video_container_size.width, i->rectangle.height * _video_container_size.height);
288 /* Then we need a corrective translation, consisting of two parts:
290 * 1. that which is the result of the scaling of the subtitle by _video_container_size; this will be
291 * rect.x * _video_container_size.width and rect.y * _video_container_size.height.
293 * 2. that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
294 * (width_before_subtitle_scale * (1 - subtitle_x_scale) / 2) and
295 * (height_before_subtitle_scale * (1 - subtitle_y_scale) / 2).
297 * Combining these two translations gives these expressions.
304 dcp::YUV_TO_RGB_REC601,
305 i->image->pixel_format (),
310 lrint (_video_container_size.width * i->rectangle.x),
311 lrint (_video_container_size.height * i->rectangle.y)
320 shared_ptr<PlayerVideo>
321 Player::black_player_video_frame () const
323 return shared_ptr<PlayerVideo> (
325 shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
328 _video_container_size,
329 _video_container_size,
332 PresetColourConversion::all().front().conversion
338 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
340 DCPTime s = t - piece->content->position ();
341 s = min (piece->content->length_after_trim(), s);
342 s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
344 /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
345 then convert that ContentTime to frames at the content's rate. However this fails for
346 situations like content at 29.9978733fps, DCP at 30fps. The accuracy of the Time type is not
347 enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
349 Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
351 return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
355 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
357 /* See comment in dcp_to_content_video */
358 DCPTime const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime (piece->content->trim_start (), piece->frc);
359 return max (DCPTime (), d + piece->content->position ());
363 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
365 DCPTime s = t - piece->content->position ();
366 s = min (piece->content->length_after_trim(), s);
367 /* See notes in dcp_to_content_video */
368 return max (DCPTime (), DCPTime (piece->content->trim_start (), piece->frc) + s).frames_floor (_film->audio_frame_rate ());
372 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
374 /* See comment in dcp_to_content_video */
375 DCPTime const d = DCPTime::from_frames (f, _film->audio_frame_rate()) - DCPTime (piece->content->trim_start(), piece->frc);
376 return max (DCPTime (), d + piece->content->position ());
380 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
382 DCPTime s = t - piece->content->position ();
383 s = min (piece->content->length_after_trim(), s);
384 return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
388 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
390 return max (DCPTime (), DCPTime (t - piece->content->trim_start(), piece->frc) + piece->content->position());
393 list<shared_ptr<Font> >
394 Player::get_subtitle_fonts ()
396 if (!_have_valid_pieces) {
400 list<shared_ptr<Font> > fonts;
401 BOOST_FOREACH (shared_ptr<Piece>& p, _pieces) {
402 if (p->content->subtitle) {
403 /* XXX: things may go wrong if there are duplicate font IDs
404 with different font files.
406 list<shared_ptr<Font> > f = p->content->subtitle->fonts ();
407 copy (f.begin(), f.end(), back_inserter (fonts));
414 /** Set this player never to produce any video data */
416 Player::set_ignore_video ()
418 _ignore_video = true;
421 /** Set whether or not this player should always burn text subtitles into the image,
422 * regardless of the content settings.
423 * @param burn true to always burn subtitles, false to obey content settings.
426 Player::set_always_burn_subtitles (bool burn)
428 _always_burn_subtitles = burn;
435 _have_valid_pieces = false;
439 Player::set_play_referenced ()
441 _play_referenced = true;
442 _have_valid_pieces = false;
445 list<ReferencedReelAsset>
446 Player::get_reel_assets ()
448 list<ReferencedReelAsset> a;
450 BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
451 shared_ptr<DCPContent> j = dynamic_pointer_cast<DCPContent> (i);
456 scoped_ptr<DCPDecoder> decoder;
458 decoder.reset (new DCPDecoder (j, _film->log()));
464 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
466 DCPOMATIC_ASSERT (j->video_frame_rate ());
467 double const cfr = j->video_frame_rate().get();
468 Frame const trim_start = j->trim_start().frames_round (cfr);
469 Frame const trim_end = j->trim_end().frames_round (cfr);
470 int const ffr = _film->video_frame_rate ();
472 DCPTime const from = i->position() + DCPTime::from_frames (offset, _film->video_frame_rate());
473 if (j->reference_video ()) {
474 shared_ptr<dcp::ReelAsset> ra = k->main_picture ();
475 DCPOMATIC_ASSERT (ra);
476 ra->set_entry_point (ra->entry_point() + trim_start);
477 ra->set_duration (ra->duration() - trim_start - trim_end);
479 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
483 if (j->reference_audio ()) {
484 shared_ptr<dcp::ReelAsset> ra = k->main_sound ();
485 DCPOMATIC_ASSERT (ra);
486 ra->set_entry_point (ra->entry_point() + trim_start);
487 ra->set_duration (ra->duration() - trim_start - trim_end);
489 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
493 if (j->reference_subtitle ()) {
494 shared_ptr<dcp::ReelAsset> ra = k->main_subtitle ();
495 DCPOMATIC_ASSERT (ra);
496 ra->set_entry_point (ra->entry_point() + trim_start);
497 ra->set_duration (ra->duration() - trim_start - trim_end);
499 ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
503 /* Assume that main picture duration is the length of the reel */
504 offset += k->main_picture()->duration ();
514 if (!_have_valid_pieces) {
518 shared_ptr<Piece> earliest;
519 DCPTime earliest_content;
521 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
523 DCPTime const t = i->content->position() + DCPTime (i->decoder->position(), i->frc);
524 if (!earliest || t < earliest_content) {
525 earliest_content = t;
532 earliest->done = earliest->decoder->pass ();
533 if (earliest->done && earliest->content->audio) {
534 /* Flush the Player audio system for this piece */
535 BOOST_FOREACH (AudioStreamPtr i, earliest->content->audio->streams()) {
536 audio_flush (earliest, i);
541 /* Fill towards the next thing that might happen (or the end of the playlist). This is to fill gaps between content,
542 NOT to fill gaps within content (the latter is done in ::video())
544 DCPTime fill_towards = earliest ? earliest_content : _playlist->length();
546 /* Work out where to fill video from */
547 optional<DCPTime> video_fill_from;
548 if (_last_video_time && !_playlist->video_content_at(*_last_video_time)) {
549 /* No seek; fill from the last video time */
550 video_fill_from = _last_video_time;
551 } else if (_last_seek_time && !_playlist->video_content_at(*_last_seek_time)) {
552 /* Seek into an empty area; fill from the seek time */
553 video_fill_from = _last_seek_time;
557 /* Fill some black if we would emit before the earliest piece of content. This is so we act like a phantom
558 Piece which emits black in spaces (we only emit if we are the earliest thing)
560 if (earliest && video_fill_from && *video_fill_from < earliest_content && ((fill_towards - *video_fill_from)) > one_video_frame()) {
561 emit_video (black_player_video_frame(), *video_fill_from);
563 } else if (_playlist->length() == DCPTime()) {
564 /* Special case of an empty Film; just give one black frame */
565 emit_video (black_player_video_frame(), DCPTime());
569 optional<DCPTime> audio_fill_from;
570 if (_last_audio_time && !_playlist->audio_content_at(*_last_audio_time)) {
571 /* No seek; fill from the last thing that happened */
572 audio_fill_from = _last_audio_time;
573 } else if (_last_seek_time && !_playlist->audio_content_at(*_last_seek_time)) {
574 /* Seek into an empty area; fill from the seek time */
575 audio_fill_from = _last_seek_time;
578 if (audio_fill_from && audio_fill_from < fill_towards) {
579 DCPTimePeriod period (*audio_fill_from, fill_towards);
580 if (period.duration() > one_video_frame()) {
581 period.to = period.from + one_video_frame();
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_seek_time && _last_seek_accurate && time < *_last_seek_time)) {
669 /* Fill gaps caused by (the hopefully rare event of) a decoder not emitting contiguous video. We have to do this here
670 as in the problematic case we are about to emit a frame which is not contiguous with the previous.
673 if (_last_video_time) {
674 /* XXX: this may not work for 3D */
675 BOOST_FOREACH (DCPTimePeriod i, subtract(DCPTimePeriod (*_last_video_time, time), _no_video)) {
676 for (DCPTime j = i.from; j < i.to; j += one_video_frame()) {
678 emit_video (shared_ptr<PlayerVideo> (new PlayerVideo (*_last_video)), j);
680 emit_video (black_player_video_frame(), j);
689 piece->content->video->crop (),
690 piece->content->video->fade (video.frame),
691 piece->content->video->scale().size (
692 piece->content->video, _video_container_size, _film->frame_size ()
694 _video_container_size,
697 piece->content->video->colour_conversion ()
701 emit_video (_last_video, time);
705 Player::audio_flush (shared_ptr<Piece> piece, AudioStreamPtr stream)
707 shared_ptr<AudioContent> content = piece->content->audio;
708 DCPOMATIC_ASSERT (content);
710 shared_ptr<Resampler> r = resampler (content, stream, false);
715 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->flush ();
716 if (ro.first->frames() == 0) {
720 ContentAudio content_audio;
721 content_audio.audio = ro.first;
722 content_audio.frame = ro.second;
724 /* Compute time in the DCP */
725 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
727 audio_transform (content, stream, content_audio, time);
730 /** Do our common processing on some audio */
732 Player::audio_transform (shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time)
734 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
738 if (content->gain() != 0) {
739 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
740 gain->apply_gain (content->gain ());
741 content_audio.audio = gain;
746 shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), content_audio.audio->frames()));
747 dcp_mapped->make_silent ();
749 AudioMapping map = stream->mapping ();
750 for (int i = 0; i < map.input_channels(); ++i) {
751 for (int j = 0; j < dcp_mapped->channels(); ++j) {
752 if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
753 dcp_mapped->accumulate_channel (
754 content_audio.audio.get(),
756 static_cast<dcp::Channel> (j),
757 map.get (i, static_cast<dcp::Channel> (j))
763 content_audio.audio = dcp_mapped;
767 if (_audio_processor) {
768 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
773 _audio_merger.push (content_audio.audio, time);
774 DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
775 _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
779 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
781 DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
783 shared_ptr<Piece> piece = wp.lock ();
788 shared_ptr<AudioContent> content = piece->content->audio;
789 DCPOMATIC_ASSERT (content);
792 if (stream->frame_rate() != content->resampled_frame_rate()) {
793 shared_ptr<Resampler> r = resampler (content, stream, true);
794 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->run (content_audio.audio, content_audio.frame);
795 if (ro.first->frames() == 0) {
798 content_audio.audio = ro.first;
799 content_audio.frame = ro.second;
802 /* Compute time in the DCP */
803 DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
804 /* And the end of this block in the DCP */
805 DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate());
807 /* Pad any gap which may be caused by audio delay */
808 if (_last_audio_time) {
809 fill_audio (DCPTimePeriod (*_last_audio_time, time));
810 } else if (_last_seek_time && _last_seek_accurate) {
811 fill_audio (DCPTimePeriod (*_last_seek_time, time));
814 /* Remove anything that comes before the start or after the end of the content */
815 if (time < piece->content->position()) {
816 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
818 /* This audio is entirely discarded */
821 content_audio.audio = cut.first;
823 } else if (time > piece->content->end()) {
826 } else if (end > piece->content->end()) {
827 Frame const remaining_frames = DCPTime(piece->content->end() - time).frames_round(_film->audio_frame_rate());
828 if (remaining_frames == 0) {
831 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
832 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
833 content_audio.audio = cut;
836 audio_transform (content, stream, content_audio, time);
840 Player::image_subtitle_start (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
842 shared_ptr<Piece> piece = wp.lock ();
847 /* Apply content's subtitle offsets */
848 subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
849 subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
851 /* Apply content's subtitle scale */
852 subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
853 subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
855 /* Apply a corrective translation to keep the subtitle centred after that scale */
856 subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * (piece->content->subtitle->x_scale() - 1);
857 subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * (piece->content->subtitle->y_scale() - 1);
860 ps.image.push_back (subtitle.sub);
861 DCPTime from (content_time_to_dcp (piece, subtitle.from()));
863 _active_subtitles.add_from (wp, ps, from);
867 Player::text_subtitle_start (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
869 shared_ptr<Piece> piece = wp.lock ();
875 DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
877 BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
878 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
879 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
880 float const xs = piece->content->subtitle->x_scale();
881 float const ys = piece->content->subtitle->y_scale();
882 float size = s.size();
884 /* Adjust size to express the common part of the scaling;
885 e.g. if xs = ys = 0.5 we scale size by 2.
887 if (xs > 1e-5 && ys > 1e-5) {
888 size *= 1 / min (1 / xs, 1 / ys);
892 /* Then express aspect ratio changes */
893 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
894 s.set_aspect_adjust (xs / ys);
897 s.set_in (dcp::Time(from.seconds(), 1000));
898 ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
899 ps.add_fonts (piece->content->subtitle->fonts ());
902 _active_subtitles.add_from (wp, ps, from);
906 Player::subtitle_stop (weak_ptr<Piece> wp, ContentTime to)
908 if (!_active_subtitles.have (wp)) {
912 shared_ptr<Piece> piece = wp.lock ();
917 DCPTime const dcp_to = content_time_to_dcp (piece, to);
919 pair<PlayerSubtitles, DCPTime> from = _active_subtitles.add_to (wp, dcp_to);
921 if (piece->content->subtitle->use() && !_always_burn_subtitles && !piece->content->subtitle->burn()) {
922 Subtitle (from.first, DCPTimePeriod (from.second, dcp_to));
927 Player::seek (DCPTime time, bool accurate)
929 if (_audio_processor) {
930 _audio_processor->flush ();
933 for (ResamplerMap::iterator i = _resamplers.begin(); i != _resamplers.end(); ++i) {
938 _audio_merger.clear ();
939 _active_subtitles.clear ();
941 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
942 if (time < i->content->position()) {
943 /* Before; seek to 0 */
944 i->decoder->seek (ContentTime(), accurate);
946 } else if (i->content->position() <= time && time < i->content->end()) {
947 /* During; seek to position */
948 i->decoder->seek (dcp_to_content_time (i, time), accurate);
951 /* After; this piece is done */
956 _last_video_time = optional<DCPTime> ();
957 _last_audio_time = optional<DCPTime> ();
958 _last_seek_time = time;
959 _last_seek_accurate = accurate;
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);