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