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         for (auto eyes: eyes_to_emit) {
1098                 _last_video[weak_piece] = std::make_shared<PlayerVideo>(
1099                         video.image,
1100                         content_video->actual_crop(),
1101                         content_video->fade(film, video.frame),
1102                         scale_for_display(
1103                                 content_video->scaled_size(film->frame_size()),
1104                                 _video_container_size,
1105                                 film->frame_size(),
1106                                 content_video->pixel_quanta()
1107                                 ),
1108                         _video_container_size,
1109                         eyes,
1110                         video.part,
1111                         content_video->colour_conversion(),
1112                         content_video->range(),
1113                         piece->content,
1114                         video.frame,
1115                         false
1116                         );
1117
1118                 DCPTime t = time;
1119                 for (int i = 0; i < frc.repeat; ++i) {
1120                         if (t < piece->content->end(film)) {
1121                                 emit_video (_last_video[weak_piece], t);
1122                         }
1123                         t += one_video_frame ();
1124                 }
1125         }
1126 }
1127
1128
1129 void
1130 Player::audio (weak_ptr<Piece> weak_piece, AudioStreamPtr stream, ContentAudio content_audio)
1131 {
1132         if (_suspended) {
1133                 return;
1134         }
1135
1136         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1137
1138         auto piece = weak_piece.lock ();
1139         if (!piece) {
1140                 return;
1141         }
1142
1143         auto film = _film.lock();
1144         if (!film) {
1145                 return;
1146         }
1147
1148         auto content = piece->content->audio;
1149         DCPOMATIC_ASSERT (content);
1150
1151         int const rfr = content->resampled_frame_rate(film);
1152
1153         /* Compute time in the DCP */
1154         auto time = resampled_audio_to_dcp (piece, content_audio.frame);
1155
1156         /* And the end of this block in the DCP */
1157         auto end = time + DCPTime::from_frames(content_audio.audio->frames(), rfr);
1158         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());
1159
1160         /* Remove anything that comes before the start or after the end of the content */
1161         if (time < piece->content->position()) {
1162                 auto cut = discard_audio (content_audio.audio, time, piece->content->position());
1163                 if (!cut.first) {
1164                         /* This audio is entirely discarded */
1165                         return;
1166                 }
1167                 content_audio.audio = cut.first;
1168                 time = cut.second;
1169         } else if (time > piece->content->end(film)) {
1170                 /* Discard it all */
1171                 return;
1172         } else if (end > piece->content->end(film)) {
1173                 Frame const remaining_frames = DCPTime(piece->content->end(film) - time).frames_round(rfr);
1174                 if (remaining_frames == 0) {
1175                         return;
1176                 }
1177                 content_audio.audio = make_shared<AudioBuffers>(content_audio.audio, remaining_frames, 0);
1178         }
1179
1180         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1181
1182         /* Gain and fade */
1183
1184         auto const fade_coeffs = content->fade (stream, content_audio.frame, content_audio.audio->frames(), rfr);
1185         if (content->gain() != 0 || !fade_coeffs.empty()) {
1186                 auto gain_buffers = make_shared<AudioBuffers>(content_audio.audio);
1187                 if (!fade_coeffs.empty()) {
1188                         /* Apply both fade and gain */
1189                         DCPOMATIC_ASSERT (fade_coeffs.size() == static_cast<size_t>(gain_buffers->frames()));
1190                         auto const channels = gain_buffers->channels();
1191                         auto const frames = fade_coeffs.size();
1192                         auto data = gain_buffers->data();
1193                         auto const gain = db_to_linear (content->gain());
1194                         for (auto channel = 0; channel < channels; ++channel) {
1195                                 for (auto frame = 0U; frame < frames; ++frame) {
1196                                         data[channel][frame] *= gain * fade_coeffs[frame];
1197                                 }
1198                         }
1199                 } else {
1200                         /* Just apply gain */
1201                         gain_buffers->apply_gain (content->gain());
1202                 }
1203                 content_audio.audio = gain_buffers;
1204         }
1205
1206         /* Remap */
1207
1208         content_audio.audio = remap(content_audio.audio, film->audio_channels(), stream->mapping());
1209
1210         /* Process */
1211
1212         if (_audio_processor && !_disable_audio_processor) {
1213                 content_audio.audio = _audio_processor->run(content_audio.audio, film->audio_channels());
1214         }
1215
1216         /* Push */
1217
1218         _audio_merger.push (content_audio.audio, time);
1219         DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
1220         _stream_states[stream].last_push_end = time + DCPTime::from_frames(content_audio.audio->frames(), film->audio_frame_rate());
1221 }
1222
1223
1224 void
1225 Player::bitmap_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentBitmapText subtitle)
1226 {
1227         if (_suspended) {
1228                 return;
1229         }
1230
1231         auto piece = weak_piece.lock ();
1232         auto content = weak_content.lock ();
1233         if (!piece || !content) {
1234                 return;
1235         }
1236
1237         PlayerText ps;
1238         for (auto& sub: subtitle.subs)
1239         {
1240                 /* Apply content's subtitle offsets */
1241                 sub.rectangle.x += content->x_offset ();
1242                 sub.rectangle.y += content->y_offset ();
1243
1244                 /* Apply a corrective translation to keep the subtitle centred after the scale that is coming up */
1245                 sub.rectangle.x -= sub.rectangle.width * ((content->x_scale() - 1) / 2);
1246                 sub.rectangle.y -= sub.rectangle.height * ((content->y_scale() - 1) / 2);
1247
1248                 /* Apply content's subtitle scale */
1249                 sub.rectangle.width *= content->x_scale ();
1250                 sub.rectangle.height *= content->y_scale ();
1251
1252                 auto image = sub.image;
1253
1254                 /* We will scale the subtitle up to fit _video_container_size */
1255                 int const width = sub.rectangle.width * _video_container_size.load().width;
1256                 int const height = sub.rectangle.height * _video_container_size.load().height;
1257                 if (width == 0 || height == 0) {
1258                         return;
1259                 }
1260
1261                 dcp::Size scaled_size (width, height);
1262                 ps.bitmap.push_back (BitmapText(image->scale(scaled_size, dcp::YUVToRGB::REC601, image->pixel_format(), Image::Alignment::PADDED, _fast), sub.rectangle));
1263         }
1264
1265         DCPTime from(content_time_to_dcp(piece, subtitle.from()));
1266         _active_texts[content->type()].add_from(weak_content, ps, from);
1267 }
1268
1269
1270 void
1271 Player::plain_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentStringText subtitle)
1272 {
1273         if (_suspended) {
1274                 return;
1275         }
1276
1277         auto piece = weak_piece.lock ();
1278         auto content = weak_content.lock ();
1279         auto film = _film.lock();
1280         if (!piece || !content || !film) {
1281                 return;
1282         }
1283
1284         PlayerText ps;
1285         DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
1286
1287         if (from > piece->content->end(film)) {
1288                 return;
1289         }
1290
1291         for (auto s: subtitle.subs) {
1292                 s.set_h_position (s.h_position() + content->x_offset());
1293                 s.set_v_position (s.v_position() + content->y_offset());
1294                 float const xs = content->x_scale();
1295                 float const ys = content->y_scale();
1296                 float size = s.size();
1297
1298                 /* Adjust size to express the common part of the scaling;
1299                    e.g. if xs = ys = 0.5 we scale size by 2.
1300                 */
1301                 if (xs > 1e-5 && ys > 1e-5) {
1302                         size *= 1 / min (1 / xs, 1 / ys);
1303                 }
1304                 s.set_size (size);
1305
1306                 /* Then express aspect ratio changes */
1307                 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
1308                         s.set_aspect_adjust (xs / ys);
1309                 }
1310
1311                 s.set_in (dcp::Time(from.seconds(), 1000));
1312                 ps.string.push_back (s);
1313         }
1314
1315         _active_texts[content->type()].add_from(weak_content, ps, from);
1316 }
1317
1318
1319 void
1320 Player::subtitle_stop (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentTime to)
1321 {
1322         if (_suspended) {
1323                 return;
1324         }
1325
1326         auto content = weak_content.lock ();
1327         if (!content) {
1328                 return;
1329         }
1330
1331         if (!_active_texts[content->type()].have(weak_content)) {
1332                 return;
1333         }
1334
1335         auto piece = weak_piece.lock ();
1336         auto film = _film.lock();
1337         if (!piece || !film) {
1338                 return;
1339         }
1340
1341         DCPTime const dcp_to = content_time_to_dcp (piece, to);
1342
1343         if (dcp_to > piece->content->end(film)) {
1344                 return;
1345         }
1346
1347         auto from = _active_texts[content->type()].add_to(weak_content, dcp_to);
1348
1349         bool const always = (content->type() == TextType::OPEN_SUBTITLE && _always_burn_open_subtitles);
1350         if (content->use() && !always && !content->burn()) {
1351                 Text (from.first, content->type(), content->dcp_track().get_value_or(DCPTextTrack()), DCPTimePeriod(from.second, dcp_to));
1352         }
1353 }
1354
1355
1356 void
1357 Player::seek (DCPTime time, bool accurate)
1358 {
1359         boost::mutex::scoped_lock lm (_mutex);
1360         LOG_DEBUG_PLAYER("Seek to %1 (%2accurate)", to_string(time), accurate ? "" : "in");
1361
1362         if (_suspended) {
1363                 /* We can't seek in this state */
1364                 return;
1365         }
1366
1367         auto film = _film.lock();
1368         if (!film) {
1369                 return;
1370         }
1371
1372         if (_shuffler) {
1373                 _shuffler->clear ();
1374         }
1375
1376         _delay.clear ();
1377
1378         if (_audio_processor) {
1379                 _audio_processor->flush ();
1380         }
1381
1382         _audio_merger.clear ();
1383         std::for_each(_active_texts.begin(), _active_texts.end(), [](ActiveText& a) { a.clear(); });
1384
1385         for (auto i: _pieces) {
1386                 if (time < i->content->position()) {
1387                         /* Before; seek to the start of the content.  Even if this request is for an inaccurate seek
1388                            we must seek this (following) content accurately, otherwise when we come to the end of the current
1389                            content we may not start right at the beginning of the next, causing a gap (if the next content has
1390                            been trimmed to a point between keyframes, or something).
1391                         */
1392                         i->decoder->seek (dcp_to_content_time (i, i->content->position()), true);
1393                         i->done = false;
1394                 } else if (i->content->position() <= time && time < i->content->end(film)) {
1395                         /* During; seek to position */
1396                         i->decoder->seek (dcp_to_content_time (i, time), accurate);
1397                         i->done = false;
1398                 } else {
1399                         /* After; this piece is done */
1400                         i->done = true;
1401                 }
1402         }
1403
1404         if (accurate) {
1405                 _next_video_time = time;
1406                 _next_video_eyes = Eyes::LEFT;
1407                 _next_audio_time = time;
1408         } else {
1409                 _next_video_time = boost::none;
1410                 _next_video_eyes = boost::none;
1411                 _next_audio_time = boost::none;
1412         }
1413
1414         _black.set_position (time);
1415         _silent.set_position (time);
1416
1417         _last_video.clear ();
1418
1419         for (auto& state: _stream_states) {
1420                 state.second.last_push_end = boost::none;
1421         }
1422 }
1423
1424
1425 void
1426 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1427 {
1428         auto film = _film.lock();
1429         DCPOMATIC_ASSERT(film);
1430
1431         /* We need a delay to give a little wiggle room to ensure that relevant subtitles arrive at the
1432            player before the video that requires them.
1433         */
1434         _delay.push_back (make_pair (pv, time));
1435
1436         if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
1437                 _next_video_time = time + one_video_frame();
1438         }
1439         _next_video_eyes = increment_eyes (pv->eyes());
1440
1441         if (_delay.size() < 3) {
1442                 return;
1443         }
1444
1445         auto to_do = _delay.front();
1446         _delay.pop_front();
1447         do_emit_video (to_do.first, to_do.second);
1448 }
1449
1450
1451 void
1452 Player::do_emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1453 {
1454         if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
1455                 std::for_each(_active_texts.begin(), _active_texts.end(), [time](ActiveText& a) { a.clear_before(time); });
1456         }
1457
1458         auto subtitles = open_subtitles_for_frame (time);
1459         if (subtitles) {
1460                 pv->set_text (subtitles.get ());
1461         }
1462
1463         Video (pv, time);
1464 }
1465
1466
1467 void
1468 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1469 {
1470         auto film = _film.lock();
1471         DCPOMATIC_ASSERT(film);
1472
1473         /* Log if the assert below is about to fail */
1474         if (_next_audio_time && labs(time.get() - _next_audio_time->get()) > 1) {
1475                 film->log()->log(String::compose("Out-of-sequence emit %1 vs %2", to_string(time), to_string(*_next_audio_time)), LogEntry::TYPE_WARNING);
1476         }
1477
1478         /* This audio must follow on from the previous, allowing for half a sample (at 48kHz) leeway */
1479         DCPOMATIC_ASSERT (!_next_audio_time || labs(time.get() - _next_audio_time->get()) < 2);
1480         Audio(data, time, film->audio_frame_rate());
1481         _next_audio_time = time + DCPTime::from_frames(data->frames(), film->audio_frame_rate());
1482 }
1483
1484
1485 void
1486 Player::fill_audio (DCPTimePeriod period)
1487 {
1488         auto film = _film.lock();
1489         DCPOMATIC_ASSERT(film);
1490
1491         if (period.from == period.to) {
1492                 return;
1493         }
1494
1495         DCPOMATIC_ASSERT (period.from < period.to);
1496
1497         DCPTime t = period.from;
1498         while (t < period.to) {
1499                 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
1500                 Frame const samples = block.frames_round(film->audio_frame_rate());
1501                 if (samples) {
1502                         auto silence = make_shared<AudioBuffers>(film->audio_channels(), samples);
1503                         silence->make_silent ();
1504                         emit_audio (silence, t);
1505                 }
1506                 t += block;
1507         }
1508 }
1509
1510
1511 DCPTime
1512 Player::one_video_frame () const
1513 {
1514         auto film = _film.lock();
1515         DCPOMATIC_ASSERT(film);
1516
1517         return DCPTime::from_frames(1, film->video_frame_rate ());
1518 }
1519
1520
1521 pair<shared_ptr<AudioBuffers>, DCPTime>
1522 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1523 {
1524         auto film = _film.lock();
1525         DCPOMATIC_ASSERT(film);
1526
1527         auto const discard_time = discard_to - time;
1528         auto const discard_frames = discard_time.frames_round(film->audio_frame_rate());
1529         auto remaining_frames = audio->frames() - discard_frames;
1530         if (remaining_frames <= 0) {
1531                 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1532         }
1533         auto cut = make_shared<AudioBuffers>(audio, remaining_frames, discard_frames);
1534         return make_pair(cut, time + discard_time);
1535 }
1536
1537
1538 void
1539 Player::set_dcp_decode_reduction (optional<int> reduction)
1540 {
1541         ChangeSignaller<Player, int> cc(this, PlayerProperty::DCP_DECODE_REDUCTION);
1542
1543         if (reduction == _dcp_decode_reduction.load()) {
1544                 cc.abort();
1545                 return;
1546         }
1547
1548         _dcp_decode_reduction = reduction;
1549         setup_pieces();
1550 }
1551
1552
1553 optional<DCPTime>
1554 Player::content_time_to_dcp (shared_ptr<const Content> content, ContentTime t) const
1555 {
1556         boost::mutex::scoped_lock lm (_mutex);
1557
1558         for (auto i: _pieces) {
1559                 if (i->content == content) {
1560                         return content_time_to_dcp (i, t);
1561                 }
1562         }
1563
1564         /* We couldn't find this content; perhaps things are being changed over */
1565         return {};
1566 }
1567
1568
1569 optional<ContentTime>
1570 Player::dcp_to_content_time (shared_ptr<const Content> content, DCPTime t) const
1571 {
1572         boost::mutex::scoped_lock lm (_mutex);
1573
1574         for (auto i: _pieces) {
1575                 if (i->content == content) {
1576                         return dcp_to_content_time (i, t);
1577                 }
1578         }
1579
1580         /* We couldn't find this content; perhaps things are being changed over */
1581         return {};
1582 }
1583
1584
1585 shared_ptr<const Playlist>
1586 Player::playlist () const
1587 {
1588         auto film = _film.lock();
1589         if (!film) {
1590                 return {};
1591         }
1592
1593         return _playlist ? _playlist : film->playlist();
1594 }
1595
1596
1597 void
1598 Player::atmos (weak_ptr<Piece> weak_piece, ContentAtmos data)
1599 {
1600         if (_suspended) {
1601                 return;
1602         }
1603
1604         auto film = _film.lock();
1605         DCPOMATIC_ASSERT(film);
1606
1607         auto piece = weak_piece.lock ();
1608         DCPOMATIC_ASSERT (piece);
1609
1610         auto const vfr = film->video_frame_rate();
1611
1612         DCPTime const dcp_time = DCPTime::from_frames(data.frame, vfr) - DCPTime(piece->content->trim_start(), FrameRateChange(vfr, vfr));
1613         if (dcp_time < piece->content->position() || dcp_time >= (piece->content->end(film))) {
1614                 return;
1615         }
1616
1617         auto ignore_atmos = std::find_if(
1618                 piece->ignore_atmos.begin(),
1619                 piece->ignore_atmos.end(),
1620                 [dcp_time](DCPTimePeriod period) { return period.contains(dcp_time); }
1621                 );
1622         if (ignore_atmos != piece->ignore_atmos.end()) {
1623                 return;
1624         }
1625
1626         Atmos (data.data, dcp_time, data.metadata);
1627 }
1628
1629
1630 void
1631 Player::signal_change(ChangeType type, int property)
1632 {
1633         Change(type, property, false);
1634 }
1635
1636
1637 /** Must be called from the same thread that calls ::pass() */
1638 void
1639 Player::set_disable_audio_processor()
1640 {
1641         _disable_audio_processor = true;
1642 }
1643