src/lib/player.cc

   1 /*
   2     Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   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.
  10
  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.
  15
  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/>.
  18
  19 */
  20
  21
  22 #include "atmos_decoder.h"
  23 #include "audio_buffers.h"
  24 #include "audio_content.h"
  25 #include "audio_decoder.h"
  26 #include "audio_processor.h"
  27 #include "compose.hpp"
  28 #include "config.h"
  29 #include "content_audio.h"
  30 #include "content_video.h"
  31 #include "dcp_content.h"
  32 #include "dcp_decoder.h"
  33 #include "dcpomatic_log.h"
  34 #include "decoder.h"
  35 #include "decoder_factory.h"
  36 #include "ffmpeg_content.h"
  37 #include "film.h"
  38 #include "frame_rate_change.h"
  39 #include "image.h"
  40 #include "image_decoder.h"
  41 #include "job.h"
  42 #include "log.h"
  43 #include "maths_util.h"
  44 #include "piece.h"
  45 #include "player.h"
  46 #include "player_video.h"
  47 #include "playlist.h"
  48 #include "ratio.h"
  49 #include "raw_image_proxy.h"
  50 #include "render_text.h"
  51 #include "shuffler.h"
  52 #include "text_content.h"
  53 #include "text_decoder.h"
  54 #include "timer.h"
  55 #include "video_decoder.h"
  56 #include <dcp/reel.h>
  57 #include <dcp/reel_closed_caption_asset.h>
  58 #include <dcp/reel_picture_asset.h>
  59 #include <dcp/reel_sound_asset.h>
  60 #include <dcp/reel_subtitle_asset.h>
  61 #include <algorithm>
  62 #include <iostream>
  63 #include <stdint.h>
  64
  65 #include "i18n.h"
  66
  67
  68 using std::copy;
  69 using std::cout;
  70 using std::dynamic_pointer_cast;
  71 using std::list;
  72 using std::make_pair;
  73 using std::make_shared;
  74 using std::make_shared;
  75 using std::max;
  76 using std::min;
  77 using std::min;
  78 using std::pair;
  79 using std::shared_ptr;
  80 using std::vector;
  81 using std::weak_ptr;
  82 using boost::optional;
  83 using boost::scoped_ptr;
  84 #if BOOST_VERSION >= 106100
  85 using namespace boost::placeholders;
  86 #endif
  87 using namespace dcpomatic;
  88
  89
  90 int const PlayerProperty::VIDEO_CONTAINER_SIZE = 700;
  91 int const PlayerProperty::PLAYLIST = 701;
  92 int const PlayerProperty::FILM_CONTAINER = 702;
  93 int const PlayerProperty::FILM_VIDEO_FRAME_RATE = 703;
  94 int const PlayerProperty::DCP_DECODE_REDUCTION = 704;
  95 int const PlayerProperty::PLAYBACK_LENGTH = 705;
  96 int const PlayerProperty::IGNORE_VIDEO = 706;
  97 int const PlayerProperty::IGNORE_AUDIO = 707;
  98 int const PlayerProperty::IGNORE_TEXT = 708;
  99 int const PlayerProperty::ALWAYS_BURN_OPEN_SUBTITLES = 709;
 100 int const PlayerProperty::PLAY_REFERENCED = 710;
 101
 102
 103 Player::Player (shared_ptr<const Film> film, Image::Alignment subtitle_alignment)
 104         : _film (film)
 105         , _suspended (0)
 106         , _ignore_video(false)
 107         , _ignore_audio(false)
 108         , _ignore_text(false)
 109         , _always_burn_open_subtitles(false)
 110         , _fast(false)
 111         , _tolerant (film->tolerant())
 112         , _play_referenced(false)
 113         , _audio_merger(film->audio_frame_rate())
 114         , _subtitle_alignment (subtitle_alignment)
 115 {
 116         construct ();
 117 }
 118
 119
 120 Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist_)
 121         : _film (film)
 122         , _playlist (playlist_)
 123         , _suspended (0)
 124         , _ignore_video(false)
 125         , _ignore_audio(false)
 126         , _ignore_text(false)
 127         , _always_burn_open_subtitles(false)
 128         , _fast(false)
 129         , _tolerant (film->tolerant())
 130         , _play_referenced(false)
 131         , _audio_merger(film->audio_frame_rate())
 132 {
 133         construct ();
 134 }
 135
 136
 137 void
 138 Player::construct ()
 139 {
 140         auto film = _film.lock();
 141         DCPOMATIC_ASSERT(film);
 142
 143         connect();
 144         set_video_container_size(film->frame_size());
 145
 146         film_change(ChangeType::DONE, FilmProperty::AUDIO_PROCESSOR);
 147
 148         setup_pieces ();
 149         seek (DCPTime (), true);
 150 }
 151
 152
 153 void
 154 Player::connect()
 155 {
 156         auto film = _film.lock();
 157         DCPOMATIC_ASSERT(film);
 158
 159         _film_changed_connection = film->Change.connect(bind(&Player::film_change, this, _1, _2));
 160         /* The butler must hear about this first, so since we are proxying this through to the butler we must
 161            be first.
 162         */
 163         _playlist_change_connection = playlist()->Change.connect (bind (&Player::playlist_change, this, _1), boost::signals2::at_front);
 164         _playlist_content_change_connection = playlist()->ContentChange.connect (bind(&Player::playlist_content_change, this, _1, _3, _4));
 165 }
 166
 167
 168 Player::Player(Player&& other)
 169         : _film(other._film)
 170         , _playlist(std::move(other._playlist))
 171         , _suspended(other._suspended.load())
 172         , _pieces(std::move(other._pieces))
 173         , _video_container_size(other._video_container_size.load())
 174         , _black_image(std::move(other._black_image))
 175         , _ignore_video(other._ignore_video.load())
 176         , _ignore_audio(other._ignore_audio.load())
 177         , _ignore_text(other._ignore_text.load())
 178         , _always_burn_open_subtitles(other._always_burn_open_subtitles.load())
 179         , _fast(other._fast.load())
 180         , _tolerant(other._tolerant)
 181         , _play_referenced(other._play_referenced.load())
 182         , _next_video_time(other._next_video_time)
 183         , _next_audio_time(other._next_audio_time)
 184         , _dcp_decode_reduction(other._dcp_decode_reduction.load())
 185         , _last_video(std::move(other._last_video))
 186         , _audio_merger(std::move(other._audio_merger))
 187         , _shuffler(std::move(other._shuffler))
 188         , _delay(std::move(other._delay))
 189         , _stream_states(std::move(other._stream_states))
 190         , _black(std::move(other._black))
 191         , _silent(std::move(other._silent))
 192         , _active_texts(std::move(other._active_texts))
 193         , _audio_processor(std::move(other._audio_processor))
 194         , _disable_audio_processor(other._disable_audio_processor)
 195         , _playback_length(other._playback_length.load())
 196         , _subtitle_alignment(other._subtitle_alignment)
 197 {
 198         connect();
 199 }
 200
 201
 202 Player&
 203 Player::operator=(Player&& other)
 204 {
 205         if (this == &other) {
 206                 return *this;
 207         }
 208
 209         _film = std::move(other._film);
 210         _playlist = std::move(other._playlist);
 211         _suspended = other._suspended.load();
 212         _pieces = std::move(other._pieces);
 213         _video_container_size = other._video_container_size.load();
 214         _black_image = std::move(other._black_image);
 215         _ignore_video = other._ignore_video.load();
 216         _ignore_audio = other._ignore_audio.load();
 217         _ignore_text = other._ignore_text.load();
 218         _always_burn_open_subtitles = other._always_burn_open_subtitles.load();
 219         _fast = other._fast.load();
 220         _tolerant = other._tolerant;
 221         _play_referenced = other._play_referenced.load();
 222         _next_video_time = other._next_video_time;
 223         _next_audio_time = other._next_audio_time;
 224         _dcp_decode_reduction = other._dcp_decode_reduction.load();
 225         _last_video = std::move(other._last_video);
 226         _audio_merger = std::move(other._audio_merger);
 227         _shuffler = std::move(other._shuffler);
 228         _delay = std::move(other._delay);
 229         _stream_states = std::move(other._stream_states);
 230         _black = std::move(other._black);
 231         _silent = std::move(other._silent);
 232         _active_texts = std::move(other._active_texts);
 233         _audio_processor = std::move(other._audio_processor);
 234         _disable_audio_processor = other._disable_audio_processor;
 235         _playback_length = other._playback_length.load();
 236         _subtitle_alignment = other._subtitle_alignment;
 237
 238         connect();
 239
 240         return *this;
 241 }
 242
 243
 244 bool
 245 have_video (shared_ptr<const Content> content)
 246 {
 247         return static_cast<bool>(content->video) && content->video->use() && content->can_be_played();
 248 }
 249
 250
 251 bool
 252 have_audio (shared_ptr<const Content> content)
 253 {
 254         return static_cast<bool>(content->audio) && content->can_be_played();
 255 }
 256
 257
 258 void
 259 Player::setup_pieces ()
 260 {
 261         boost::mutex::scoped_lock lm (_mutex);
 262
 263         auto old_pieces = _pieces;
 264         _pieces.clear ();
 265
 266         auto film = _film.lock();
 267         if (!film) {
 268                 return;
 269         }
 270
 271         _playback_length = _playlist ? _playlist->length(film) : film->length();
 272
 273         auto playlist_content = playlist()->content();
 274         bool const have_threed = std::any_of(
 275                 playlist_content.begin(),
 276                 playlist_content.end(),
 277                 [](shared_ptr<const Content> c) {
 278                         return c->video && (c->video->frame_type() == VideoFrameType::THREE_D_LEFT || c->video->frame_type() == VideoFrameType::THREE_D_RIGHT);
 279                 });
 280
 281
 282         if (have_threed) {
 283                 _shuffler.reset(new Shuffler());
 284                 _shuffler->Video.connect(bind(&Player::video, this, _1, _2));
 285         }
 286
 287         for (auto content: playlist()->content()) {
 288
 289                 if (!content->paths_valid()) {
 290                         continue;
 291                 }
 292
 293                 if (_ignore_video && _ignore_audio && content->text.empty()) {
 294                         /* We're only interested in text and this content has none */
 295                         continue;
 296                 }
 297
 298                 shared_ptr<Decoder> old_decoder;
 299                 for (auto j: old_pieces) {
 300                         if (j->content == content) {
 301                                 old_decoder = j->decoder;
 302                                 break;
 303                         }
 304                 }
 305
 306                 auto decoder = decoder_factory(film, content, _fast, _tolerant, old_decoder);
 307                 DCPOMATIC_ASSERT (decoder);
 308
 309                 FrameRateChange frc(film, content);
 310
 311                 if (decoder->video && _ignore_video) {
 312                         decoder->video->set_ignore (true);
 313                 }
 314
 315                 if (decoder->audio && _ignore_audio) {
 316                         decoder->audio->set_ignore (true);
 317                 }
 318
 319                 if (_ignore_text) {
 320                         for (auto i: decoder->text) {
 321                                 i->set_ignore (true);
 322                         }
 323                 }
 324
 325                 auto dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
 326                 if (dcp) {
 327                         dcp->set_decode_referenced (_play_referenced);
 328                         if (_play_referenced) {
 329                                 dcp->set_forced_reduction (_dcp_decode_reduction);
 330                         }
 331                 }
 332
 333                 auto piece = make_shared<Piece>(content, decoder, frc);
 334                 _pieces.push_back (piece);
 335
 336                 if (decoder->video) {
 337                         if (have_threed) {
 338                                 /* We need a Shuffler to cope with 3D L/R video data arriving out of sequence */
 339                                 decoder->video->Data.connect (bind(&Shuffler::video, _shuffler.get(), weak_ptr<Piece>(piece), _1));
 340                         } else {
 341                                 decoder->video->Data.connect (bind(&Player::video, this, weak_ptr<Piece>(piece), _1));
 342                         }
 343                 }
 344
 345                 if (decoder->audio) {
 346                         decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
 347                 }
 348
 349                 auto j = decoder->text.begin();
 350
 351                 while (j != decoder->text.end()) {
 352                         (*j)->BitmapStart.connect (
 353                                 bind(&Player::bitmap_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 354                                 );
 355                         (*j)->PlainStart.connect (
 356                                 bind(&Player::plain_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 357                                 );
 358                         (*j)->Stop.connect (
 359                                 bind(&Player::subtitle_stop, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 360                                 );
 361
 362                         ++j;
 363                 }
 364
 365                 if (decoder->atmos) {
 366                         decoder->atmos->Data.connect (bind(&Player::atmos, this, weak_ptr<Piece>(piece), _1));
 367                 }
 368         }
 369
 370         _stream_states.clear ();
 371         for (auto i: _pieces) {
 372                 if (i->content->audio) {
 373                         for (auto j: i->content->audio->streams()) {
 374                                 _stream_states[j] = StreamState(i);
 375                         }
 376                 }
 377         }
 378
 379         auto ignore_overlap = [](shared_ptr<VideoContent> v) {
 380                 return v && v->use() && v->frame_type() != VideoFrameType::THREE_D_LEFT && v->frame_type() != VideoFrameType::THREE_D_RIGHT;
 381         };
 382
 383         for (auto piece = _pieces.begin(); piece != _pieces.end(); ++piece) {
 384                 if (ignore_overlap((*piece)->content->video)) {
 385                         /* Look for content later in the content list with in-use video that overlaps this */
 386                         auto const period = (*piece)->content->period(film);
 387                         for (auto later_piece = std::next(piece); later_piece != _pieces.end(); ++later_piece) {
 388                                 if (ignore_overlap((*later_piece)->content->video)) {
 389                                         if (auto overlap = (*later_piece)->content->period(film).overlap(period)) {
 390                                                 (*piece)->ignore_video.push_back(*overlap);
 391                                         }
 392                                 }
 393                         }
 394                 }
 395         }
 396
 397         for (auto piece = _pieces.begin(); piece != _pieces.end(); ++piece) {
 398                 if ((*piece)->content->atmos) {
 399                         /* Look for content later in the content list with ATMOS that overlaps this */
 400                         auto const period = (*piece)->content->period(film);
 401                         for (auto later_piece = std::next(piece); later_piece != _pieces.end(); ++later_piece) {
 402                                 if ((*later_piece)->content->atmos) {
 403                                         if (auto overlap = (*later_piece)->content->period(film).overlap(period)) {
 404                                                 (*piece)->ignore_atmos.push_back(*overlap);
 405                                         }
 406                                 }
 407                         }
 408                 }
 409         }
 410
 411         _black = Empty(film, playlist(), bind(&have_video, _1), _playback_length);
 412         _silent = Empty(film, playlist(), bind(&have_audio, _1), _playback_length);
 413
 414         _next_video_time = boost::none;
 415         _next_video_eyes = Eyes::BOTH;
 416         _next_audio_time = boost::none;
 417 }
 418
 419
 420 void
 421 Player::playlist_content_change (ChangeType type, int property, bool frequent)
 422 {
 423         auto film = _film.lock();
 424         if (!film) {
 425                 return;
 426         }
 427
 428         if (property == VideoContentProperty::CROP) {
 429                 if (type == ChangeType::DONE) {
 430                         boost::mutex::scoped_lock lm (_mutex);
 431                         for (auto const& i: _delay) {
 432                                 i.first->reset_metadata(film, _video_container_size);
 433                         }
 434                 }
 435         } else {
 436                 if (type == ChangeType::PENDING) {
 437                         /* The player content is probably about to change, so we can't carry on
 438                            until that has happened and we've rebuilt our pieces.  Stop pass()
 439                            and seek() from working until then.
 440                         */
 441                         ++_suspended;
 442                 } else if (type == ChangeType::DONE) {
 443                         /* A change in our content has gone through.  Re-build our pieces. */
 444                         setup_pieces ();
 445                         --_suspended;
 446                 } else if (type == ChangeType::CANCELLED) {
 447                         --_suspended;
 448                 }
 449         }
 450
 451         Change (type, property, frequent);
 452 }
 453
 454
 455 void
 456 Player::set_video_container_size (dcp::Size s)
 457 {
 458         ChangeSignaller<Player, int> cc(this, PlayerProperty::VIDEO_CONTAINER_SIZE);
 459
 460         if (s == _video_container_size) {
 461                 cc.abort();
 462                 return;
 463         }
 464
 465         _video_container_size = s;
 466
 467         {
 468                 boost::mutex::scoped_lock lm(_black_image_mutex);
 469                 _black_image = make_shared<Image>(AV_PIX_FMT_RGB24, _video_container_size, Image::Alignment::PADDED);
 470                 _black_image->make_black ();
 471         }
 472 }
 473
 474
 475 void
 476 Player::playlist_change (ChangeType type)
 477 {
 478         if (type == ChangeType::DONE) {
 479                 setup_pieces ();
 480         }
 481         Change (type, PlayerProperty::PLAYLIST, false);
 482 }
 483
 484
 485 void
 486 Player::film_change(ChangeType type, FilmProperty p)
 487 {
 488         /* Here we should notice Film properties that affect our output, and
 489            alert listeners that our output now would be different to how it was
 490            last time we were run.
 491         */
 492
 493         auto film = _film.lock();
 494         if (!film) {
 495                 return;
 496         }
 497
 498         if (p == FilmProperty::CONTAINER) {
 499                 Change (type, PlayerProperty::FILM_CONTAINER, false);
 500         } else if (p == FilmProperty::VIDEO_FRAME_RATE) {
 501                 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
 502                    so we need new pieces here.
 503                 */
 504                 if (type == ChangeType::DONE) {
 505                         setup_pieces ();
 506                 }
 507                 Change (type, PlayerProperty::FILM_VIDEO_FRAME_RATE, false);
 508         } else if (p == FilmProperty::AUDIO_PROCESSOR) {
 509                 if (type == ChangeType::DONE && film->audio_processor ()) {
 510                         boost::mutex::scoped_lock lm (_mutex);
 511                         _audio_processor = film->audio_processor()->clone(film->audio_frame_rate());
 512                 }
 513         } else if (p == FilmProperty::AUDIO_CHANNELS) {
 514                 if (type == ChangeType::DONE) {
 515                         boost::mutex::scoped_lock lm (_mutex);
 516                         _audio_merger.clear ();
 517                 }
 518         }
 519 }
 520
 521
 522 shared_ptr<PlayerVideo>
 523 Player::black_player_video_frame (Eyes eyes) const
 524 {
 525         boost::mutex::scoped_lock lm(_black_image_mutex);
 526
 527         return std::make_shared<PlayerVideo> (
 528                 std::make_shared<const RawImageProxy>(_black_image),
 529                 Crop(),
 530                 optional<double>(),
 531                 _video_container_size,
 532                 _video_container_size,
 533                 eyes,
 534                 Part::WHOLE,
 535                 PresetColourConversion::all().front().conversion,
 536                 VideoRange::FULL,
 537                 std::weak_ptr<Content>(),
 538                 boost::optional<Frame>(),
 539                 false
 540         );
 541 }
 542
 543
 544 Frame
 545 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
 546 {
 547         auto film = _film.lock();
 548         DCPOMATIC_ASSERT(film);
 549
 550         auto s = t - piece->content->position ();
 551         s = min (piece->content->length_after_trim(film), s);
 552         s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
 553
 554         /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
 555            then convert that ContentTime to frames at the content's rate.  However this fails for
 556            situations like content at 29.9978733fps, DCP at 30fps.  The accuracy of the Time type is not
 557            enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
 558
 559            Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
 560         */
 561         return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
 562 }
 563
 564
 565 DCPTime
 566 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
 567 {
 568         /* See comment in dcp_to_content_video */
 569         auto const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime(piece->content->trim_start(), piece->frc);
 570         return d + piece->content->position();
 571 }
 572
 573
 574 Frame
 575 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
 576 {
 577         auto film = _film.lock();
 578         DCPOMATIC_ASSERT(film);
 579
 580         auto s = t - piece->content->position ();
 581         s = min (piece->content->length_after_trim(film), s);
 582         /* See notes in dcp_to_content_video */
 583         return max (DCPTime(), DCPTime(piece->content->trim_start(), piece->frc) + s).frames_floor(film->audio_frame_rate());
 584 }
 585
 586
 587 DCPTime
 588 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
 589 {
 590         auto film = _film.lock();
 591         DCPOMATIC_ASSERT(film);
 592
 593         /* See comment in dcp_to_content_video */
 594         return DCPTime::from_frames(f, film->audio_frame_rate())
 595                 - DCPTime (piece->content->trim_start(), piece->frc)
 596                 + piece->content->position();
 597 }
 598
 599
 600 ContentTime
 601 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
 602 {
 603         auto film = _film.lock();
 604         DCPOMATIC_ASSERT(film);
 605
 606         auto s = t - piece->content->position ();
 607         s = min (piece->content->length_after_trim(film), s);
 608         return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
 609 }
 610
 611
 612 DCPTime
 613 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
 614 {
 615         return max (DCPTime(), DCPTime(t - piece->content->trim_start(), piece->frc) + piece->content->position());
 616 }
 617
 618
 619 vector<shared_ptr<Font>>
 620 Player::get_subtitle_fonts ()
 621 {
 622         boost::mutex::scoped_lock lm (_mutex);
 623
 624         vector<shared_ptr<Font>> fonts;
 625         for (auto piece: _pieces) {
 626                 for (auto text: piece->content->text) {
 627                         auto text_fonts = text->fonts();
 628                         copy (text_fonts.begin(), text_fonts.end(), back_inserter(fonts));
 629                 }
 630         }
 631
 632         return fonts;
 633 }
 634
 635
 636 /** Set this player never to produce any video data */
 637 void
 638 Player::set_ignore_video ()
 639 {
 640         ChangeSignaller<Player, int> cc(this, PlayerProperty::IGNORE_VIDEO);
 641         _ignore_video = true;
 642         setup_pieces();
 643 }
 644
 645
 646 void
 647 Player::set_ignore_audio ()
 648 {
 649         ChangeSignaller<Player, int> cc(this, PlayerProperty::IGNORE_AUDIO);
 650         _ignore_audio = true;
 651         setup_pieces();
 652 }
 653
 654
 655 void
 656 Player::set_ignore_text ()
 657 {
 658         ChangeSignaller<Player, int> cc(this, PlayerProperty::IGNORE_TEXT);
 659         _ignore_text = true;
 660         setup_pieces();
 661 }
 662
 663
 664 /** Set the player to always burn open texts into the image regardless of the content settings */
 665 void
 666 Player::set_always_burn_open_subtitles ()
 667 {
 668         ChangeSignaller<Player, int> cc(this, PlayerProperty::ALWAYS_BURN_OPEN_SUBTITLES);
 669         _always_burn_open_subtitles = true;
 670 }
 671
 672
 673 /** Sets up the player to be faster, possibly at the expense of quality */
 674 void
 675 Player::set_fast ()
 676 {
 677         _fast = true;
 678         setup_pieces();
 679 }
 680
 681
 682 void
 683 Player::set_play_referenced ()
 684 {
 685         ChangeSignaller<Player, int> cc(this, PlayerProperty::PLAY_REFERENCED);
 686         _play_referenced = true;
 687         setup_pieces();
 688 }
 689
 690
 691 bool
 692 Player::pass ()
 693 {
 694         boost::mutex::scoped_lock lm (_mutex);
 695
 696         if (_suspended) {
 697                 /* We can't pass in this state */
 698                 LOG_DEBUG_PLAYER_NC ("Player is suspended");
 699                 return false;
 700         }
 701
 702         auto film = _film.lock();
 703
 704         if (_playback_length.load() == DCPTime() || !film) {
 705                 /* Special; just give one black frame */
 706                 emit_video (black_player_video_frame(Eyes::BOTH), DCPTime());
 707                 return true;
 708         }
 709
 710         /* Find the decoder or empty which is farthest behind where we are and make it emit some data */
 711
 712         shared_ptr<Piece> earliest_content;
 713         optional<DCPTime> earliest_time;
 714
 715         for (auto i: _pieces) {
 716                 if (i->done) {
 717                         continue;
 718                 }
 719
 720                 auto const t = content_time_to_dcp (i, max(i->decoder->position(), i->content->trim_start()));
 721                 if (t > i->content->end(film)) {
 722                         i->done = true;
 723                 } else {
 724
 725                         /* Given two choices at the same time, pick the one with texts so we see it before
 726                            the video.
 727                         */
 728                         if (!earliest_time || t < *earliest_time || (t == *earliest_time && !i->decoder->text.empty())) {
 729                                 earliest_time = t;
 730                                 earliest_content = i;
 731                         }
 732                 }
 733         }
 734
 735         bool done = false;
 736
 737         enum {
 738                 NONE,
 739                 CONTENT,
 740                 BLACK,
 741                 SILENT
 742         } which = NONE;
 743
 744         if (earliest_content) {
 745                 which = CONTENT;
 746         }
 747
 748         if (!_black.done() && !_ignore_video && (!earliest_time || _black.position() < *earliest_time)) {
 749                 earliest_time = _black.position ();
 750                 which = BLACK;
 751         }
 752
 753         if (!_silent.done() && !_ignore_audio && (!earliest_time || _silent.position() < *earliest_time)) {
 754                 earliest_time = _silent.position ();
 755                 which = SILENT;
 756         }
 757
 758         switch (which) {
 759         case CONTENT:
 760         {
 761                 LOG_DEBUG_PLAYER ("Calling pass() on %1", earliest_content->content->path(0));
 762                 earliest_content->done = earliest_content->decoder->pass ();
 763                 auto dcp = dynamic_pointer_cast<DCPContent>(earliest_content->content);
 764                 if (dcp && !_play_referenced && dcp->reference_audio()) {
 765                         /* We are skipping some referenced DCP audio content, so we need to update _next_audio_time
 766                            to `hide' the fact that no audio was emitted during the referenced DCP (though
 767                            we need to behave as though it was).
 768                         */
 769                         _next_audio_time = dcp->end(film);
 770                 }
 771                 break;
 772         }
 773         case BLACK:
 774                 LOG_DEBUG_PLAYER ("Emit black for gap at %1", to_string(_black.position()));
 775                 if (film->three_d()) {
 776                         emit_video(black_player_video_frame(Eyes::LEFT), _black.position());
 777                         emit_video(black_player_video_frame(Eyes::RIGHT), _black.position());
 778                 } else {
 779                         emit_video(black_player_video_frame(Eyes::BOTH), _black.position());
 780                 }
 781                 _black.set_position (_black.position() + one_video_frame());
 782                 break;
 783         case SILENT:
 784         {
 785                 LOG_DEBUG_PLAYER ("Emit silence for gap at %1", to_string(_silent.position()));
 786                 DCPTimePeriod period (_silent.period_at_position());
 787                 if (_next_audio_time) {
 788                         /* Sometimes the thing that happened last finishes fractionally before
 789                            or after this silence.  Bodge the start time of the silence to fix it.
 790                            I think this is nothing to worry about since we will just add or
 791                            remove a little silence at the end of some content.
 792                         */
 793                         int64_t const error = labs(period.from.get() - _next_audio_time->get());
 794                         /* Let's not worry about less than a frame at 24fps */
 795                         int64_t const too_much_error = DCPTime::from_frames(1, 24).get();
 796                         if (error >= too_much_error) {
 797                                 film->log()->log(String::compose("Silence starting before or after last audio by %1", error), LogEntry::TYPE_ERROR);
 798                         }
 799                         DCPOMATIC_ASSERT (error < too_much_error);
 800                         period.from = *_next_audio_time;
 801                 }
 802                 if (period.duration() > one_video_frame()) {
 803                         period.to = period.from + one_video_frame();
 804                 }
 805                 fill_audio (period);
 806                 _silent.set_position (period.to);
 807                 break;
 808         }
 809         case NONE:
 810                 done = true;
 811                 break;
 812         }
 813
 814         /* Emit any audio that is ready */
 815
 816         /* Work out the time before which the audio is definitely all here.  This is the earliest last_push_end of one
 817            of our streams, or the position of the _silent.  First, though we choose only streams that are less than
 818            ignore_streams_behind seconds behind the furthest ahead (we assume that if a stream has fallen that far
 819            behind it has finished).  This is so that we don't withhold audio indefinitely awaiting data from a stream
 820            that will never come, causing bugs like #2101.
 821         */
 822         constexpr int ignore_streams_behind = 5;
 823
 824         using state_pair = std::pair<AudioStreamPtr, StreamState>;
 825
 826         /* Find streams that have pushed */
 827         std::vector<state_pair> have_pushed;
 828         std::copy_if(_stream_states.begin(), _stream_states.end(), std::back_inserter(have_pushed), [](state_pair const& a) { return static_cast<bool>(a.second.last_push_end); });
 829
 830         /* Find the 'leading' stream (i.e. the one that pushed data most recently) */
 831         auto latest_last_push_end = std::max_element(
 832                 have_pushed.begin(),
 833                 have_pushed.end(),
 834                 [](state_pair const& a, state_pair const& b) { return a.second.last_push_end.get() < b.second.last_push_end.get(); }
 835                 );
 836
 837         std::map<AudioStreamPtr, StreamState> alive_stream_states;
 838
 839         if (latest_last_push_end != have_pushed.end()) {
 840                 LOG_DEBUG_PLAYER("Leading audio stream is in %1 at %2", latest_last_push_end->second.piece->content->path(0), to_string(latest_last_push_end->second.last_push_end.get()));
 841
 842                 /* Now make a list of those streams that are less than ignore_streams_behind behind the leader */
 843                 for (auto const& i: _stream_states) {
 844                         if (!i.second.last_push_end || (latest_last_push_end->second.last_push_end.get() - i.second.last_push_end.get()) < dcpomatic::DCPTime::from_seconds(ignore_streams_behind)) {
 845                                 alive_stream_states.insert(i);
 846                         } else {
 847                                 LOG_DEBUG_PLAYER("Ignoring stream %1 because it is too far behind", i.second.piece->content->path(0));
 848                         }
 849                 }
 850         }
 851
 852         auto pull_to = _playback_length.load();
 853         for (auto const& i: alive_stream_states) {
 854                 auto position = i.second.last_push_end.get_value_or(i.second.piece->content->position());
 855                 if (!i.second.piece->done && position < pull_to) {
 856                         pull_to = position;
 857                 }
 858         }
 859         if (!_silent.done() && _silent.position() < pull_to) {
 860                 pull_to = _silent.position();
 861         }
 862
 863         LOG_DEBUG_PLAYER("Emitting audio up to %1", to_string(pull_to));
 864         auto audio = _audio_merger.pull (pull_to);
 865         for (auto i = audio.begin(); i != audio.end(); ++i) {
 866                 if (_next_audio_time && i->second < *_next_audio_time) {
 867                         /* This new data comes before the last we emitted (or the last seek); discard it */
 868                         auto cut = discard_audio (i->first, i->second, *_next_audio_time);
 869                         if (!cut.first) {
 870                                 continue;
 871                         }
 872                         *i = cut;
 873                 } else if (_next_audio_time && i->second > *_next_audio_time) {
 874                         /* There's a gap between this data and the last we emitted; fill with silence */
 875                         fill_audio (DCPTimePeriod (*_next_audio_time, i->second));
 876                 }
 877
 878                 emit_audio (i->first, i->second);
 879         }
 880
 881         if (done) {
 882                 if (_shuffler) {
 883                         _shuffler->flush ();
 884                 }
 885                 for (auto const& i: _delay) {
 886                         do_emit_video(i.first, i.second);
 887                 }
 888
 889                 /* Perhaps we should have Empty entries for both eyes in the 3D case (somehow).
 890                  * However, if we have L and R video files, and one is shorter than the other,
 891                  * the fill code in ::video mostly takes care of filling in the gaps.
 892                  * However, since it fills at the point when it knows there is more video coming
 893                  * at time t (so it should fill any gap up to t) it can't do anything right at the
 894                  * end.  This is particularly bad news if the last frame emitted is a LEFT
 895                  * eye, as the MXF writer will complain about the 3D sequence being wrong.
 896                  * Here's a hack to workaround that particular case.
 897                  */
 898                 if (_next_video_eyes && _next_video_time && *_next_video_eyes == Eyes::RIGHT) {
 899                         do_emit_video (black_player_video_frame(Eyes::RIGHT), *_next_video_time);
 900                 }
 901         }
 902
 903         return done;
 904 }
 905
 906
 907 /** @return Open subtitles for the frame at the given time, converted to images */
 908 optional<PositionImage>
 909 Player::open_subtitles_for_frame (DCPTime time) const
 910 {
 911         auto film = _film.lock();
 912         if (!film) {
 913                 return {};
 914         }
 915
 916         list<PositionImage> captions;
 917         int const vfr = film->video_frame_rate();
 918
 919         for (
 920                 auto j:
 921                 _active_texts[TextType::OPEN_SUBTITLE].get_burnt(DCPTimePeriod(time, time + DCPTime::from_frames(1, vfr)), _always_burn_open_subtitles)
 922                 ) {
 923
 924                 /* Bitmap subtitles */
 925                 for (auto i: j.bitmap) {
 926                         if (!i.image || i.image->size().width == 0 || i.image->size().height == 0) {
 927                                 continue;
 928                         }
 929
 930                         /* i.image will already have been scaled to fit _video_container_size */
 931                         dcp::Size scaled_size (i.rectangle.width * _video_container_size.load().width, i.rectangle.height * _video_container_size.load().height);
 932
 933                         captions.push_back (
 934                                 PositionImage (
 935                                         i.image,
 936                                         Position<int> (
 937                                                 lrint(_video_container_size.load().width * i.rectangle.x),
 938                                                 lrint(_video_container_size.load().height * i.rectangle.y)
 939                                                 )
 940                                         )
 941                                 );
 942                 }
 943
 944                 /* String subtitles (rendered to an image) */
 945                 if (!j.string.empty()) {
 946                         auto s = render_text(j.string, _video_container_size, time, vfr);
 947                         copy_if(s.begin(), s.end(), back_inserter(captions), [](PositionImage const& image) {
 948                                 return image.image->size().width && image.image->size().height;
 949                         });
 950
 951                 }
 952         }
 953
 954         if (captions.empty()) {
 955                 return {};
 956         }
 957
 958         return merge (captions, _subtitle_alignment);
 959 }
 960
 961
 962 static
 963 Eyes
 964 increment_eyes (Eyes e)
 965 {
 966         if (e == Eyes::LEFT) {
 967                 return Eyes::RIGHT;
 968         }
 969
 970         return Eyes::LEFT;
 971 }
 972
 973
 974 void
 975 Player::video (weak_ptr<Piece> weak_piece, ContentVideo video)
 976 {
 977         if (_suspended) {
 978                 return;
 979         }
 980
 981         auto piece = weak_piece.lock ();
 982         if (!piece) {
 983                 return;
 984         }
 985
 986         if (!piece->content->video->use()) {
 987                 return;
 988         }
 989
 990         auto film = _film.lock();
 991         if (!film) {
 992                 return;
 993         }
 994
 995         FrameRateChange frc(film, piece->content);
 996         if (frc.skip && (video.frame % 2) == 1) {
 997                 return;
 998         }
 999
1000         vector<Eyes> eyes_to_emit;
1001
1002         if (!film->three_d()) {
1003                 if (video.eyes == Eyes::RIGHT) {
1004                         /* 2D film, 3D content: discard right */
1005                         return;
1006                 } else if (video.eyes == Eyes::LEFT) {
1007                         /* 2D film, 3D content: emit left as "both" */
1008                         video.eyes = Eyes::BOTH;
1009                         eyes_to_emit = { Eyes::BOTH };
1010                 }
1011         } else {
1012                 if (video.eyes == Eyes::BOTH) {
1013                         /* 3D film, 2D content; emit "both" for left and right */
1014                         eyes_to_emit = { Eyes::LEFT, Eyes::RIGHT };
1015                 }
1016         }
1017
1018         if (eyes_to_emit.empty()) {
1019                 eyes_to_emit = { video.eyes };
1020         }
1021
1022         /* Time of the first frame we will emit */
1023         DCPTime const time = content_video_to_dcp (piece, video.frame);
1024         LOG_DEBUG_PLAYER("Received video frame %1 at %2", video.frame, to_string(time));
1025
1026         /* Discard if it's before the content's period or the last accurate seek.  We can't discard
1027            if it's after the content's period here as in that case we still need to fill any gap between
1028            `now' and the end of the content's period.
1029         */
1030         if (time < piece->content->position() || (_next_video_time && time < *_next_video_time)) {
1031                 return;
1032         }
1033
1034         auto ignore_video = std::find_if(
1035                 piece->ignore_video.begin(),
1036                 piece->ignore_video.end(),
1037                 [time](DCPTimePeriod period) { return period.contains(time); }
1038                 );
1039         if (ignore_video != piece->ignore_video.end()) {
1040                 return;
1041         }
1042
1043         /* Fill gaps that we discover now that we have some video which needs to be emitted.
1044            This is where we need to fill to.
1045         */
1046         DCPTime fill_to = min(time, piece->content->end(film));
1047
1048         if (_next_video_time) {
1049                 DCPTime fill_from = max (*_next_video_time, piece->content->position());
1050
1051                 /* Fill if we have more than half a frame to do */
1052                 if ((fill_to - fill_from) > one_video_frame() / 2) {
1053                         auto last = _last_video.find (weak_piece);
1054                         if (film->three_d()) {
1055                                 auto fill_to_eyes = eyes_to_emit[0];
1056                                 if (fill_to_eyes == Eyes::BOTH) {
1057                                         fill_to_eyes = Eyes::LEFT;
1058                                 }
1059                                 if (fill_to == piece->content->end(film)) {
1060                                         /* Don't fill after the end of the content */
1061                                         fill_to_eyes = Eyes::LEFT;
1062                                 }
1063                                 auto j = fill_from;
1064                                 auto eyes = _next_video_eyes.get_value_or(Eyes::LEFT);
1065                                 if (eyes == Eyes::BOTH) {
1066                                         eyes = Eyes::LEFT;
1067                                 }
1068                                 while (j < fill_to || eyes != fill_to_eyes) {
1069                                         if (last != _last_video.end()) {
1070                                                 LOG_DEBUG_PLAYER("Fill using last video at %1 in 3D mode", to_string(j));
1071                                                 auto copy = last->second->shallow_copy();
1072                                                 copy->set_eyes (eyes);
1073                                                 emit_video (copy, j);
1074                                         } else {
1075                                                 LOG_DEBUG_PLAYER("Fill using black at %1 in 3D mode", to_string(j));
1076                                                 emit_video (black_player_video_frame(eyes), j);
1077                                         }
1078                                         if (eyes == Eyes::RIGHT) {
1079                                                 j += one_video_frame();
1080                                         }
1081                                         eyes = increment_eyes (eyes);
1082                                 }
1083                         } else {
1084                                 for (DCPTime j = fill_from; j < fill_to; j += one_video_frame()) {
1085                                         if (last != _last_video.end()) {
1086                                                 emit_video (last->second, j);
1087                                         } else {
1088                                                 emit_video (black_player_video_frame(Eyes::BOTH), j);
1089                                         }
1090                                 }
1091                         }
1092                 }
1093         }
1094
1095         auto const content_video = piece->content->video;
1096
1097         auto scaled_size = content_video->scaled_size(film->frame_size());
1098         DCPOMATIC_ASSERT(scaled_size);
1099
1100         for (auto eyes: eyes_to_emit) {
1101                 _last_video[weak_piece] = std::make_shared<PlayerVideo>(
1102                         video.image,
1103                         content_video->actual_crop(),
1104                         content_video->fade(film, video.frame),
1105                         scale_for_display(
1106                                 *scaled_size,
1107                                 _video_container_size,
1108                                 film->frame_size(),
1109                                 content_video->pixel_quanta()
1110                                 ),
1111                         _video_container_size,
1112                         eyes,
1113                         video.part,
1114                         content_video->colour_conversion(),
1115                         content_video->range(),
1116                         piece->content,
1117                         video.frame,
1118                         false
1119                         );
1120
1121                 DCPTime t = time;
1122                 for (int i = 0; i < frc.repeat; ++i) {
1123                         if (t < piece->content->end(film)) {
1124                                 emit_video (_last_video[weak_piece], t);
1125                         }
1126                         t += one_video_frame ();
1127                 }
1128         }
1129 }
1130
1131
1132 void
1133 Player::audio (weak_ptr<Piece> weak_piece, AudioStreamPtr stream, ContentAudio content_audio)
1134 {
1135         if (_suspended) {
1136                 return;
1137         }
1138
1139         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1140
1141         auto piece = weak_piece.lock ();
1142         if (!piece) {
1143                 return;
1144         }
1145
1146         auto film = _film.lock();
1147         if (!film) {
1148                 return;
1149         }
1150
1151         auto content = piece->content->audio;
1152         DCPOMATIC_ASSERT (content);
1153
1154         int const rfr = content->resampled_frame_rate(film);
1155
1156         /* Compute time in the DCP */
1157         auto time = resampled_audio_to_dcp (piece, content_audio.frame);
1158
1159         /* And the end of this block in the DCP */
1160         auto end = time + DCPTime::from_frames(content_audio.audio->frames(), rfr);
1161         LOG_DEBUG_PLAYER("Received audio frame %1 covering %2 to %3 (%4)", content_audio.frame, to_string(time), to_string(end), piece->content->path(0).filename());
1162
1163         /* Remove anything that comes before the start or after the end of the content */
1164         if (time < piece->content->position()) {
1165                 auto cut = discard_audio (content_audio.audio, time, piece->content->position());
1166                 if (!cut.first) {
1167                         /* This audio is entirely discarded */
1168                         return;
1169                 }
1170                 content_audio.audio = cut.first;
1171                 time = cut.second;
1172         } else if (time > piece->content->end(film)) {
1173                 /* Discard it all */
1174                 return;
1175         } else if (end > piece->content->end(film)) {
1176                 Frame const remaining_frames = DCPTime(piece->content->end(film) - time).frames_round(rfr);
1177                 if (remaining_frames == 0) {
1178                         return;
1179                 }
1180                 content_audio.audio = make_shared<AudioBuffers>(content_audio.audio, remaining_frames, 0);
1181         }
1182
1183         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1184
1185         /* Gain and fade */
1186
1187         auto const fade_coeffs = content->fade (stream, content_audio.frame, content_audio.audio->frames(), rfr);
1188         if (content->gain() != 0 || !fade_coeffs.empty()) {
1189                 auto gain_buffers = make_shared<AudioBuffers>(content_audio.audio);
1190                 if (!fade_coeffs.empty()) {
1191                         /* Apply both fade and gain */
1192                         DCPOMATIC_ASSERT (fade_coeffs.size() == static_cast<size_t>(gain_buffers->frames()));
1193                         auto const channels = gain_buffers->channels();
1194                         auto const frames = fade_coeffs.size();
1195                         auto data = gain_buffers->data();
1196                         auto const gain = db_to_linear (content->gain());
1197                         for (auto channel = 0; channel < channels; ++channel) {
1198                                 for (auto frame = 0U; frame < frames; ++frame) {
1199                                         data[channel][frame] *= gain * fade_coeffs[frame];
1200                                 }
1201                         }
1202                 } else {
1203                         /* Just apply gain */
1204                         gain_buffers->apply_gain (content->gain());
1205                 }
1206                 content_audio.audio = gain_buffers;
1207         }
1208
1209         /* Remap */
1210
1211         content_audio.audio = remap(content_audio.audio, film->audio_channels(), stream->mapping());
1212
1213         /* Process */
1214
1215         if (_audio_processor && !_disable_audio_processor) {
1216                 content_audio.audio = _audio_processor->run(content_audio.audio, film->audio_channels());
1217         }
1218
1219         /* Push */
1220
1221         _audio_merger.push (content_audio.audio, time);
1222         DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
1223         _stream_states[stream].last_push_end = time + DCPTime::from_frames(content_audio.audio->frames(), film->audio_frame_rate());
1224 }
1225
1226
1227 void
1228 Player::bitmap_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentBitmapText subtitle)
1229 {
1230         if (_suspended) {
1231                 return;
1232         }
1233
1234         auto piece = weak_piece.lock ();
1235         auto content = weak_content.lock ();
1236         if (!piece || !content) {
1237                 return;
1238         }
1239
1240         PlayerText ps;
1241         for (auto& sub: subtitle.subs)
1242         {
1243                 /* Apply content's subtitle offsets */
1244                 sub.rectangle.x += content->x_offset ();
1245                 sub.rectangle.y += content->y_offset ();
1246
1247                 /* Apply a corrective translation to keep the subtitle centred after the scale that is coming up */
1248                 sub.rectangle.x -= sub.rectangle.width * ((content->x_scale() - 1) / 2);
1249                 sub.rectangle.y -= sub.rectangle.height * ((content->y_scale() - 1) / 2);
1250
1251                 /* Apply content's subtitle scale */
1252                 sub.rectangle.width *= content->x_scale ();
1253                 sub.rectangle.height *= content->y_scale ();
1254
1255                 auto image = sub.image;
1256
1257                 /* We will scale the subtitle up to fit _video_container_size */
1258                 int const width = sub.rectangle.width * _video_container_size.load().width;
1259                 int const height = sub.rectangle.height * _video_container_size.load().height;
1260                 if (width == 0 || height == 0) {
1261                         return;
1262                 }
1263
1264                 dcp::Size scaled_size (width, height);
1265                 ps.bitmap.push_back (BitmapText(image->scale(scaled_size, dcp::YUVToRGB::REC601, image->pixel_format(), Image::Alignment::PADDED, _fast), sub.rectangle));
1266         }
1267
1268         DCPTime from(content_time_to_dcp(piece, subtitle.from()));
1269         _active_texts[content->type()].add_from(weak_content, ps, from);
1270 }
1271
1272
1273 void
1274 Player::plain_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentStringText subtitle)
1275 {
1276         if (_suspended) {
1277                 return;
1278         }
1279
1280         auto piece = weak_piece.lock ();
1281         auto content = weak_content.lock ();
1282         auto film = _film.lock();
1283         if (!piece || !content || !film) {
1284                 return;
1285         }
1286
1287         PlayerText ps;
1288         DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
1289
1290         if (from > piece->content->end(film)) {
1291                 return;
1292         }
1293
1294         for (auto s: subtitle.subs) {
1295                 s.set_h_position (s.h_position() + content->x_offset());
1296                 s.set_v_position (s.v_position() + content->y_offset());
1297                 float const xs = content->x_scale();
1298                 float const ys = content->y_scale();
1299                 float size = s.size();
1300
1301                 /* Adjust size to express the common part of the scaling;
1302                    e.g. if xs = ys = 0.5 we scale size by 2.
1303                 */
1304                 if (xs > 1e-5 && ys > 1e-5) {
1305                         size *= 1 / min (1 / xs, 1 / ys);
1306                 }
1307                 s.set_size (size);
1308
1309                 /* Then express aspect ratio changes */
1310                 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
1311                         s.set_aspect_adjust (xs / ys);
1312                 }
1313
1314                 s.set_in (dcp::Time(from.seconds(), 1000));
1315                 ps.string.push_back (s);
1316         }
1317
1318         _active_texts[content->type()].add_from(weak_content, ps, from);
1319 }
1320
1321
1322 void
1323 Player::subtitle_stop (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentTime to)
1324 {
1325         if (_suspended) {
1326                 return;
1327         }
1328
1329         auto content = weak_content.lock ();
1330         if (!content) {
1331                 return;
1332         }
1333
1334         if (!_active_texts[content->type()].have(weak_content)) {
1335                 return;
1336         }
1337
1338         auto piece = weak_piece.lock ();
1339         auto film = _film.lock();
1340         if (!piece || !film) {
1341                 return;
1342         }
1343
1344         DCPTime const dcp_to = content_time_to_dcp (piece, to);
1345
1346         if (dcp_to > piece->content->end(film)) {
1347                 return;
1348         }
1349
1350         auto from = _active_texts[content->type()].add_to(weak_content, dcp_to);
1351
1352         bool const always = (content->type() == TextType::OPEN_SUBTITLE && _always_burn_open_subtitles);
1353         if (content->use() && !always && !content->burn()) {
1354                 Text (from.first, content->type(), content->dcp_track().get_value_or(DCPTextTrack()), DCPTimePeriod(from.second, dcp_to));
1355         }
1356 }
1357
1358
1359 void
1360 Player::seek (DCPTime time, bool accurate)
1361 {
1362         boost::mutex::scoped_lock lm (_mutex);
1363         LOG_DEBUG_PLAYER("Seek to %1 (%2accurate)", to_string(time), accurate ? "" : "in");
1364
1365         if (_suspended) {
1366                 /* We can't seek in this state */
1367                 return;
1368         }
1369
1370         auto film = _film.lock();
1371         if (!film) {
1372                 return;
1373         }
1374
1375         if (_shuffler) {
1376                 _shuffler->clear ();
1377         }
1378
1379         _delay.clear ();
1380
1381         if (_audio_processor) {
1382                 _audio_processor->flush ();
1383         }
1384
1385         _audio_merger.clear ();
1386         std::for_each(_active_texts.begin(), _active_texts.end(), [](ActiveText& a) { a.clear(); });
1387
1388         for (auto i: _pieces) {
1389                 if (time < i->content->position()) {
1390                         /* Before; seek to the start of the content.  Even if this request is for an inaccurate seek
1391                            we must seek this (following) content accurately, otherwise when we come to the end of the current
1392                            content we may not start right at the beginning of the next, causing a gap (if the next content has
1393                            been trimmed to a point between keyframes, or something).
1394                         */
1395                         i->decoder->seek (dcp_to_content_time (i, i->content->position()), true);
1396                         i->done = false;
1397                 } else if (i->content->position() <= time && time < i->content->end(film)) {
1398                         /* During; seek to position */
1399                         i->decoder->seek (dcp_to_content_time (i, time), accurate);
1400                         i->done = false;
1401                 } else {
1402                         /* After; this piece is done */
1403                         i->done = true;
1404                 }
1405         }
1406
1407         if (accurate) {
1408                 _next_video_time = time;
1409                 _next_video_eyes = Eyes::LEFT;
1410                 _next_audio_time = time;
1411         } else {
1412                 _next_video_time = boost::none;
1413                 _next_video_eyes = boost::none;
1414                 _next_audio_time = boost::none;
1415         }
1416
1417         _black.set_position (time);
1418         _silent.set_position (time);
1419
1420         _last_video.clear ();
1421
1422         for (auto& state: _stream_states) {
1423                 state.second.last_push_end = boost::none;
1424         }
1425 }
1426
1427
1428 void
1429 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1430 {
1431         auto film = _film.lock();
1432         DCPOMATIC_ASSERT(film);
1433
1434         /* We need a delay to give a little wiggle room to ensure that relevant subtitles arrive at the
1435            player before the video that requires them.
1436         */
1437         _delay.push_back (make_pair (pv, time));
1438
1439         if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
1440                 _next_video_time = time + one_video_frame();
1441         }
1442         _next_video_eyes = increment_eyes (pv->eyes());
1443
1444         if (_delay.size() < 3) {
1445                 return;
1446         }
1447
1448         auto to_do = _delay.front();
1449         _delay.pop_front();
1450         do_emit_video (to_do.first, to_do.second);
1451 }
1452
1453
1454 void
1455 Player::do_emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1456 {
1457         if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
1458                 std::for_each(_active_texts.begin(), _active_texts.end(), [time](ActiveText& a) { a.clear_before(time); });
1459         }
1460
1461         auto subtitles = open_subtitles_for_frame (time);
1462         if (subtitles) {
1463                 pv->set_text (subtitles.get ());
1464         }
1465
1466         Video (pv, time);
1467 }
1468
1469
1470 void
1471 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1472 {
1473         auto film = _film.lock();
1474         DCPOMATIC_ASSERT(film);
1475
1476         /* Log if the assert below is about to fail */
1477         if (_next_audio_time && labs(time.get() - _next_audio_time->get()) > 1) {
1478                 film->log()->log(String::compose("Out-of-sequence emit %1 vs %2", to_string(time), to_string(*_next_audio_time)), LogEntry::TYPE_WARNING);
1479         }
1480
1481         /* This audio must follow on from the previous, allowing for half a sample (at 48kHz) leeway */
1482         DCPOMATIC_ASSERT (!_next_audio_time || labs(time.get() - _next_audio_time->get()) < 2);
1483         Audio(data, time, film->audio_frame_rate());
1484         _next_audio_time = time + DCPTime::from_frames(data->frames(), film->audio_frame_rate());
1485 }
1486
1487
1488 void
1489 Player::fill_audio (DCPTimePeriod period)
1490 {
1491         auto film = _film.lock();
1492         DCPOMATIC_ASSERT(film);
1493
1494         if (period.from == period.to) {
1495                 return;
1496         }
1497
1498         DCPOMATIC_ASSERT (period.from < period.to);
1499
1500         DCPTime t = period.from;
1501         while (t < period.to) {
1502                 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
1503                 Frame const samples = block.frames_round(film->audio_frame_rate());
1504                 if (samples) {
1505                         auto silence = make_shared<AudioBuffers>(film->audio_channels(), samples);
1506                         silence->make_silent ();
1507                         emit_audio (silence, t);
1508                 }
1509                 t += block;
1510         }
1511 }
1512
1513
1514 DCPTime
1515 Player::one_video_frame () const
1516 {
1517         auto film = _film.lock();
1518         DCPOMATIC_ASSERT(film);
1519
1520         return DCPTime::from_frames(1, film->video_frame_rate ());
1521 }
1522
1523
1524 pair<shared_ptr<AudioBuffers>, DCPTime>
1525 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1526 {
1527         auto film = _film.lock();
1528         DCPOMATIC_ASSERT(film);
1529
1530         auto const discard_time = discard_to - time;
1531         auto const discard_frames = discard_time.frames_round(film->audio_frame_rate());
1532         auto remaining_frames = audio->frames() - discard_frames;
1533         if (remaining_frames <= 0) {
1534                 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1535         }
1536         auto cut = make_shared<AudioBuffers>(audio, remaining_frames, discard_frames);
1537         return make_pair(cut, time + discard_time);
1538 }
1539
1540
1541 void
1542 Player::set_dcp_decode_reduction (optional<int> reduction)
1543 {
1544         ChangeSignaller<Player, int> cc(this, PlayerProperty::DCP_DECODE_REDUCTION);
1545
1546         if (reduction == _dcp_decode_reduction.load()) {
1547                 cc.abort();
1548                 return;
1549         }
1550
1551         _dcp_decode_reduction = reduction;
1552         setup_pieces();
1553 }
1554
1555
1556 optional<DCPTime>
1557 Player::content_time_to_dcp (shared_ptr<const Content> content, ContentTime t) const
1558 {
1559         boost::mutex::scoped_lock lm (_mutex);
1560
1561         for (auto i: _pieces) {
1562                 if (i->content == content) {
1563                         return content_time_to_dcp (i, t);
1564                 }
1565         }
1566
1567         /* We couldn't find this content; perhaps things are being changed over */
1568         return {};
1569 }
1570
1571
1572 optional<ContentTime>
1573 Player::dcp_to_content_time (shared_ptr<const Content> content, DCPTime t) const
1574 {
1575         boost::mutex::scoped_lock lm (_mutex);
1576
1577         for (auto i: _pieces) {
1578                 if (i->content == content) {
1579                         return dcp_to_content_time (i, t);
1580                 }
1581         }
1582
1583         /* We couldn't find this content; perhaps things are being changed over */
1584         return {};
1585 }
1586
1587
1588 shared_ptr<const Playlist>
1589 Player::playlist () const
1590 {
1591         auto film = _film.lock();
1592         if (!film) {
1593                 return {};
1594         }
1595
1596         return _playlist ? _playlist : film->playlist();
1597 }
1598
1599
1600 void
1601 Player::atmos (weak_ptr<Piece> weak_piece, ContentAtmos data)
1602 {
1603         if (_suspended) {
1604                 return;
1605         }
1606
1607         auto film = _film.lock();
1608         DCPOMATIC_ASSERT(film);
1609
1610         auto piece = weak_piece.lock ();
1611         DCPOMATIC_ASSERT (piece);
1612
1613         auto const vfr = film->video_frame_rate();
1614
1615         DCPTime const dcp_time = DCPTime::from_frames(data.frame, vfr) - DCPTime(piece->content->trim_start(), FrameRateChange(vfr, vfr));
1616         if (dcp_time < piece->content->position() || dcp_time >= (piece->content->end(film))) {
1617                 return;
1618         }
1619
1620         auto ignore_atmos = std::find_if(
1621                 piece->ignore_atmos.begin(),
1622                 piece->ignore_atmos.end(),
1623                 [dcp_time](DCPTimePeriod period) { return period.contains(dcp_time); }
1624                 );
1625         if (ignore_atmos != piece->ignore_atmos.end()) {
1626                 return;
1627         }
1628
1629         Atmos (data.data, dcp_time, data.metadata);
1630 }
1631
1632
1633 void
1634 Player::signal_change(ChangeType type, int property)
1635 {
1636         Change(type, property, false);
1637 }
1638
1639
1640 /** Must be called from the same thread that calls ::pass() */
1641 void
1642 Player::set_disable_audio_processor()
1643 {
1644         _disable_audio_processor = true;
1645 }
1646