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 (!_next_video_time) {
 778                         /* Deciding to emit black has the same effect as getting some video from the content
 779                          * when we are inaccurately seeking.
 780                          */
 781                         _next_video_time = _black.position();
 782                 }
 783                 if (film->three_d()) {
 784                         use_video(black_player_video_frame(Eyes::LEFT), _black.position(), _black.period_at_position().to);
 785                         use_video(black_player_video_frame(Eyes::RIGHT), _black.position(), _black.period_at_position().to);
 786                 } else {
 787                         use_video(black_player_video_frame(Eyes::BOTH), _black.position(), _black.period_at_position().to);
 788                 }
 789                 _black.set_position (_black.position() + one_video_frame());
 790                 break;
 791         case SILENT:
 792         {
 793                 LOG_DEBUG_PLAYER ("Emit silence for gap at %1", to_string(_silent.position()));
 794                 DCPTimePeriod period (_silent.period_at_position());
 795                 if (_next_audio_time) {
 796                         /* Sometimes the thing that happened last finishes fractionally before
 797                            or after this silence.  Bodge the start time of the silence to fix it.
 798                            I think this is nothing to worry about since we will just add or
 799                            remove a little silence at the end of some content.
 800                         */
 801                         int64_t const error = labs(period.from.get() - _next_audio_time->get());
 802                         /* Let's not worry about less than a frame at 24fps */
 803                         int64_t const too_much_error = DCPTime::from_frames(1, 24).get();
 804                         if (error >= too_much_error) {
 805                                 film->log()->log(String::compose("Silence starting before or after last audio by %1", error), LogEntry::TYPE_ERROR);
 806                         }
 807                         DCPOMATIC_ASSERT (error < too_much_error);
 808                         period.from = *_next_audio_time;
 809                 }
 810                 if (period.duration() > one_video_frame()) {
 811                         period.to = period.from + one_video_frame();
 812                 }
 813                 fill_audio (period);
 814                 _silent.set_position (period.to);
 815                 break;
 816         }
 817         case NONE:
 818                 done = true;
 819                 break;
 820         }
 821
 822         /* Emit any audio that is ready */
 823
 824         /* Work out the time before which the audio is definitely all here.  This is the earliest last_push_end of one
 825            of our streams, or the position of the _silent.  First, though we choose only streams that are less than
 826            ignore_streams_behind seconds behind the furthest ahead (we assume that if a stream has fallen that far
 827            behind it has finished).  This is so that we don't withhold audio indefinitely awaiting data from a stream
 828            that will never come, causing bugs like #2101.
 829         */
 830         constexpr int ignore_streams_behind = 5;
 831
 832         using state_pair = std::pair<AudioStreamPtr, StreamState>;
 833
 834         /* Find streams that have pushed */
 835         std::vector<state_pair> have_pushed;
 836         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); });
 837
 838         /* Find the 'leading' stream (i.e. the one that pushed data most recently) */
 839         auto latest_last_push_end = std::max_element(
 840                 have_pushed.begin(),
 841                 have_pushed.end(),
 842                 [](state_pair const& a, state_pair const& b) { return a.second.last_push_end.get() < b.second.last_push_end.get(); }
 843                 );
 844
 845         std::map<AudioStreamPtr, StreamState> alive_stream_states;
 846
 847         if (latest_last_push_end != have_pushed.end()) {
 848                 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()));
 849
 850                 /* Now make a list of those streams that are less than ignore_streams_behind behind the leader */
 851                 for (auto const& i: _stream_states) {
 852                         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)) {
 853                                 alive_stream_states.insert(i);
 854                         } else {
 855                                 LOG_DEBUG_PLAYER("Ignoring stream %1 because it is too far behind", i.second.piece->content->path(0));
 856                         }
 857                 }
 858         }
 859
 860         auto pull_to = _playback_length.load();
 861         for (auto const& i: alive_stream_states) {
 862                 auto position = i.second.last_push_end.get_value_or(i.second.piece->content->position());
 863                 if (!i.second.piece->done && position < pull_to) {
 864                         pull_to = position;
 865                 }
 866         }
 867         if (!_silent.done() && _silent.position() < pull_to) {
 868                 pull_to = _silent.position();
 869         }
 870
 871         LOG_DEBUG_PLAYER("Emitting audio up to %1", to_string(pull_to));
 872         auto audio = _audio_merger.pull (pull_to);
 873         for (auto i = audio.begin(); i != audio.end(); ++i) {
 874                 if (_next_audio_time && i->second < *_next_audio_time) {
 875                         /* This new data comes before the last we emitted (or the last seek); discard it */
 876                         auto cut = discard_audio (i->first, i->second, *_next_audio_time);
 877                         if (!cut.first) {
 878                                 continue;
 879                         }
 880                         *i = cut;
 881                 } else if (_next_audio_time && i->second > *_next_audio_time) {
 882                         /* There's a gap between this data and the last we emitted; fill with silence */
 883                         fill_audio (DCPTimePeriod (*_next_audio_time, i->second));
 884                 }
 885
 886                 emit_audio (i->first, i->second);
 887         }
 888
 889         if (done) {
 890                 LOG_DEBUG_PLAYER("Done: emit video until end of film at %1", to_string(film->length()));
 891                 emit_video_until(film->length());
 892
 893                 if (_shuffler) {
 894                         _shuffler->flush ();
 895                 }
 896                 for (auto const& i: _delay) {
 897                         emit_video(i.first, i.second);
 898                 }
 899         }
 900
 901         return done;
 902 }
 903
 904
 905 /** @return Open subtitles for the frame at the given time, converted to images */
 906 optional<PositionImage>
 907 Player::open_subtitles_for_frame (DCPTime time) const
 908 {
 909         auto film = _film.lock();
 910         if (!film) {
 911                 return {};
 912         }
 913
 914         list<PositionImage> captions;
 915         int const vfr = film->video_frame_rate();
 916
 917         for (
 918                 auto j:
 919                 _active_texts[TextType::OPEN_SUBTITLE].get_burnt(DCPTimePeriod(time, time + DCPTime::from_frames(1, vfr)), _always_burn_open_subtitles)
 920                 ) {
 921
 922                 /* Bitmap subtitles */
 923                 for (auto i: j.bitmap) {
 924                         if (!i.image || i.image->size().width == 0 || i.image->size().height == 0) {
 925                                 continue;
 926                         }
 927
 928                         /* i.image will already have been scaled to fit _video_container_size */
 929                         dcp::Size scaled_size (i.rectangle.width * _video_container_size.load().width, i.rectangle.height * _video_container_size.load().height);
 930
 931                         captions.push_back (
 932                                 PositionImage (
 933                                         i.image,
 934                                         Position<int> (
 935                                                 lrint(_video_container_size.load().width * i.rectangle.x),
 936                                                 lrint(_video_container_size.load().height * i.rectangle.y)
 937                                                 )
 938                                         )
 939                                 );
 940                 }
 941
 942                 /* String subtitles (rendered to an image) */
 943                 if (!j.string.empty()) {
 944                         auto s = render_text(j.string, _video_container_size, time, vfr);
 945                         copy_if(s.begin(), s.end(), back_inserter(captions), [](PositionImage const& image) {
 946                                 return image.image->size().width && image.image->size().height;
 947                         });
 948
 949                 }
 950         }
 951
 952         if (captions.empty()) {
 953                 return {};
 954         }
 955
 956         return merge (captions, _subtitle_alignment);
 957 }
 958
 959
 960 void
 961 Player::emit_video_until(DCPTime time)
 962 {
 963         LOG_DEBUG_PLAYER("emit_video_until %1; next video time is %2", to_string(time), to_string(_next_video_time.get_value_or({})));
 964         auto frame = [this](shared_ptr<PlayerVideo> pv, DCPTime time) {
 965                 /* We need a delay to give a little wiggle room to ensure that relevant subtitles arrive at the
 966                    player before the video that requires them.
 967                 */
 968                 _delay.push_back(make_pair(pv, time));
 969
 970                 if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
 971                         _next_video_time = time + one_video_frame();
 972                 }
 973
 974                 if (_delay.size() < 3) {
 975                         return;
 976                 }
 977
 978                 auto to_do = _delay.front();
 979                 _delay.pop_front();
 980                 emit_video(to_do.first, to_do.second);
 981         };
 982
 983         auto const age_threshold = one_video_frame() * 2;
 984
 985         while (_next_video_time.get_value_or({}) < time) {
 986                 auto left = _last_video[Eyes::LEFT];
 987                 auto right = _last_video[Eyes::RIGHT];
 988                 auto both = _last_video[Eyes::BOTH];
 989
 990                 auto const next = _next_video_time.get_value_or({});
 991
 992                 if (
 993                         left.first &&
 994                         right.first &&
 995                         (!both.first || (left.second >= both.second && right.second >= both.second)) &&
 996                         (left.second - next) < age_threshold &&
 997                         (right.second - next) < age_threshold
 998                    ) {
 999                         frame(left.first, next);
1000                         frame(right.first, next);
1001                 } else if (both.first && (both.second - next) < age_threshold) {
1002                         frame(both.first, next);
1003                         LOG_DEBUG_PLAYER("Content %1 selected for DCP %2 (age %3)", to_string(both.second), to_string(next), to_string(both.second - next));
1004                 } else {
1005                         auto film = _film.lock();
1006                         if (film && film->three_d()) {
1007                                 frame(black_player_video_frame(Eyes::LEFT), next);
1008                                 frame(black_player_video_frame(Eyes::RIGHT), next);
1009                         } else {
1010                                 frame(black_player_video_frame(Eyes::BOTH), next);
1011                         }
1012                         LOG_DEBUG_PLAYER("Black selected for DCP %1", to_string(next));
1013                 }
1014         }
1015 }
1016
1017
1018 void
1019 Player::video (weak_ptr<Piece> weak_piece, ContentVideo video)
1020 {
1021         if (_suspended) {
1022                 return;
1023         }
1024
1025         auto piece = weak_piece.lock ();
1026         if (!piece) {
1027                 return;
1028         }
1029
1030         if (!piece->content->video->use()) {
1031                 return;
1032         }
1033
1034         auto film = _film.lock();
1035         if (!film) {
1036                 return;
1037         }
1038
1039         vector<Eyes> eyes_to_emit;
1040
1041         if (!film->three_d()) {
1042                 if (video.eyes == Eyes::RIGHT) {
1043                         /* 2D film, 3D content: discard right */
1044                         return;
1045                 } else if (video.eyes == Eyes::LEFT) {
1046                         /* 2D film, 3D content: emit left as "both" */
1047                         video.eyes = Eyes::BOTH;
1048                         eyes_to_emit = { Eyes::BOTH };
1049                 }
1050         } else {
1051                 if (video.eyes == Eyes::BOTH) {
1052                         /* 3D film, 2D content; emit "both" for left and right */
1053                         eyes_to_emit = { Eyes::LEFT, Eyes::RIGHT };
1054                 }
1055         }
1056
1057         if (eyes_to_emit.empty()) {
1058                 eyes_to_emit = { video.eyes };
1059         }
1060
1061         /* Time of the frame we just received within the DCP */
1062         auto const time = content_time_to_dcp(piece, video.time);
1063         LOG_DEBUG_PLAYER("Received video frame %1 %2 eyes %3", to_string(video.time), to_string(time), static_cast<int>(video.eyes));
1064
1065         if (time < piece->content->position()) {
1066                 return;
1067         }
1068
1069         auto ignore_video = std::find_if(
1070                 piece->ignore_video.begin(),
1071                 piece->ignore_video.end(),
1072                 [time](DCPTimePeriod period) { return period.contains(time); }
1073                 );
1074         if (ignore_video != piece->ignore_video.end()) {
1075                 return;
1076         }
1077
1078         if (!_next_video_time) {
1079                 _next_video_time = time.round(film->video_frame_rate());
1080         }
1081
1082         auto const content_video = piece->content->video;
1083
1084         auto scaled_size = content_video->scaled_size(film->frame_size());
1085         DCPOMATIC_ASSERT(scaled_size);
1086
1087         for (auto eyes: eyes_to_emit) {
1088                 use_video(
1089                         std::make_shared<PlayerVideo>(
1090                                 video.image,
1091                                 content_video->actual_crop(),
1092                                 content_video->fade(film, video.time),
1093                                 scale_for_display(
1094                                         *scaled_size,
1095                                         _video_container_size,
1096                                         film->frame_size(),
1097                                         content_video->pixel_quanta()
1098                                         ),
1099                                 _video_container_size,
1100                                 eyes,
1101                                 video.part,
1102                                 content_video->colour_conversion(),
1103                                 content_video->range(),
1104                                 piece->content,
1105                                 video.time,
1106                                 false
1107                                 ),
1108                         time,
1109                         piece->content->end(film)
1110                         );
1111         }
1112 }
1113
1114 void
1115 Player::use_video(shared_ptr<PlayerVideo> pv, DCPTime time, DCPTime end)
1116 {
1117         _last_video[pv->eyes()] = { pv, time };
1118         if (pv->eyes() != Eyes::LEFT) {
1119                 emit_video_until(std::min(time + one_video_frame() / 2, end));
1120         }
1121 }
1122
1123
1124 void
1125 Player::audio (weak_ptr<Piece> weak_piece, AudioStreamPtr stream, ContentAudio content_audio)
1126 {
1127         if (_suspended) {
1128                 return;
1129         }
1130
1131         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1132
1133         auto piece = weak_piece.lock ();
1134         if (!piece) {
1135                 return;
1136         }
1137
1138         auto film = _film.lock();
1139         if (!film) {
1140                 return;
1141         }
1142
1143         auto content = piece->content->audio;
1144         DCPOMATIC_ASSERT (content);
1145
1146         int const rfr = content->resampled_frame_rate(film);
1147
1148         /* Compute time in the DCP */
1149         auto time = resampled_audio_to_dcp (piece, content_audio.frame);
1150
1151         /* And the end of this block in the DCP */
1152         auto end = time + DCPTime::from_frames(content_audio.audio->frames(), rfr);
1153         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());
1154
1155         /* Remove anything that comes before the start or after the end of the content */
1156         if (time < piece->content->position()) {
1157                 auto cut = discard_audio (content_audio.audio, time, piece->content->position());
1158                 if (!cut.first) {
1159                         /* This audio is entirely discarded */
1160                         return;
1161                 }
1162                 content_audio.audio = cut.first;
1163                 time = cut.second;
1164         } else if (time > piece->content->end(film)) {
1165                 /* Discard it all */
1166                 return;
1167         } else if (end > piece->content->end(film)) {
1168                 Frame const remaining_frames = DCPTime(piece->content->end(film) - time).frames_round(rfr);
1169                 if (remaining_frames == 0) {
1170                         return;
1171                 }
1172                 content_audio.audio = make_shared<AudioBuffers>(content_audio.audio, remaining_frames, 0);
1173         }
1174
1175         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1176
1177         /* Gain and fade */
1178
1179         auto const fade_coeffs = content->fade (stream, content_audio.frame, content_audio.audio->frames(), rfr);
1180         if (content->gain() != 0 || !fade_coeffs.empty()) {
1181                 auto gain_buffers = make_shared<AudioBuffers>(content_audio.audio);
1182                 if (!fade_coeffs.empty()) {
1183                         /* Apply both fade and gain */
1184                         DCPOMATIC_ASSERT (fade_coeffs.size() == static_cast<size_t>(gain_buffers->frames()));
1185                         auto const channels = gain_buffers->channels();
1186                         auto const frames = fade_coeffs.size();
1187                         auto data = gain_buffers->data();
1188                         auto const gain = db_to_linear (content->gain());
1189                         for (auto channel = 0; channel < channels; ++channel) {
1190                                 for (auto frame = 0U; frame < frames; ++frame) {
1191                                         data[channel][frame] *= gain * fade_coeffs[frame];
1192                                 }
1193                         }
1194                 } else {
1195                         /* Just apply gain */
1196                         gain_buffers->apply_gain (content->gain());
1197                 }
1198                 content_audio.audio = gain_buffers;
1199         }
1200
1201         /* Remap */
1202
1203         content_audio.audio = remap(content_audio.audio, film->audio_channels(), stream->mapping());
1204
1205         /* Process */
1206
1207         if (_audio_processor && !_disable_audio_processor) {
1208                 content_audio.audio = _audio_processor->run(content_audio.audio, film->audio_channels());
1209         }
1210
1211         /* Push */
1212
1213         _audio_merger.push (content_audio.audio, time);
1214         DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
1215         _stream_states[stream].last_push_end = time + DCPTime::from_frames(content_audio.audio->frames(), film->audio_frame_rate());
1216 }
1217
1218
1219 void
1220 Player::bitmap_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentBitmapText subtitle)
1221 {
1222         if (_suspended) {
1223                 return;
1224         }
1225
1226         auto piece = weak_piece.lock ();
1227         auto content = weak_content.lock ();
1228         if (!piece || !content) {
1229                 return;
1230         }
1231
1232         PlayerText ps;
1233         for (auto& sub: subtitle.subs)
1234         {
1235                 /* Apply content's subtitle offsets */
1236                 sub.rectangle.x += content->x_offset ();
1237                 sub.rectangle.y += content->y_offset ();
1238
1239                 /* Apply a corrective translation to keep the subtitle centred after the scale that is coming up */
1240                 sub.rectangle.x -= sub.rectangle.width * ((content->x_scale() - 1) / 2);
1241                 sub.rectangle.y -= sub.rectangle.height * ((content->y_scale() - 1) / 2);
1242
1243                 /* Apply content's subtitle scale */
1244                 sub.rectangle.width *= content->x_scale ();
1245                 sub.rectangle.height *= content->y_scale ();
1246
1247                 auto image = sub.image;
1248
1249                 /* We will scale the subtitle up to fit _video_container_size */
1250                 int const width = sub.rectangle.width * _video_container_size.load().width;
1251                 int const height = sub.rectangle.height * _video_container_size.load().height;
1252                 if (width == 0 || height == 0) {
1253                         return;
1254                 }
1255
1256                 dcp::Size scaled_size (width, height);
1257                 ps.bitmap.push_back (BitmapText(image->scale(scaled_size, dcp::YUVToRGB::REC601, image->pixel_format(), Image::Alignment::PADDED, _fast), sub.rectangle));
1258         }
1259
1260         DCPTime from(content_time_to_dcp(piece, subtitle.from()));
1261         _active_texts[content->type()].add_from(weak_content, ps, from);
1262 }
1263
1264
1265 void
1266 Player::plain_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentStringText subtitle)
1267 {
1268         if (_suspended) {
1269                 return;
1270         }
1271
1272         auto piece = weak_piece.lock ();
1273         auto content = weak_content.lock ();
1274         auto film = _film.lock();
1275         if (!piece || !content || !film) {
1276                 return;
1277         }
1278
1279         PlayerText ps;
1280         DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
1281
1282         if (from > piece->content->end(film)) {
1283                 return;
1284         }
1285
1286         for (auto s: subtitle.subs) {
1287                 s.set_h_position (s.h_position() + content->x_offset());
1288                 s.set_v_position (s.v_position() + content->y_offset());
1289                 float const xs = content->x_scale();
1290                 float const ys = content->y_scale();
1291                 float size = s.size();
1292
1293                 /* Adjust size to express the common part of the scaling;
1294                    e.g. if xs = ys = 0.5 we scale size by 2.
1295                 */
1296                 if (xs > 1e-5 && ys > 1e-5) {
1297                         size *= 1 / min (1 / xs, 1 / ys);
1298                 }
1299                 s.set_size (size);
1300
1301                 /* Then express aspect ratio changes */
1302                 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
1303                         s.set_aspect_adjust (xs / ys);
1304                 }
1305
1306                 s.set_in (dcp::Time(from.seconds(), 1000));
1307                 ps.string.push_back (s);
1308         }
1309
1310         _active_texts[content->type()].add_from(weak_content, ps, from);
1311 }
1312
1313
1314 void
1315 Player::subtitle_stop (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentTime to)
1316 {
1317         if (_suspended) {
1318                 return;
1319         }
1320
1321         auto content = weak_content.lock ();
1322         if (!content) {
1323                 return;
1324         }
1325
1326         if (!_active_texts[content->type()].have(weak_content)) {
1327                 return;
1328         }
1329
1330         auto piece = weak_piece.lock ();
1331         auto film = _film.lock();
1332         if (!piece || !film) {
1333                 return;
1334         }
1335
1336         DCPTime const dcp_to = content_time_to_dcp (piece, to);
1337
1338         if (dcp_to > piece->content->end(film)) {
1339                 return;
1340         }
1341
1342         auto from = _active_texts[content->type()].add_to(weak_content, dcp_to);
1343
1344         bool const always = (content->type() == TextType::OPEN_SUBTITLE && _always_burn_open_subtitles);
1345         if (content->use() && !always && !content->burn()) {
1346                 Text (from.first, content->type(), content->dcp_track().get_value_or(DCPTextTrack()), DCPTimePeriod(from.second, dcp_to));
1347         }
1348 }
1349
1350
1351 void
1352 Player::seek (DCPTime time, bool accurate)
1353 {
1354         boost::mutex::scoped_lock lm (_mutex);
1355         LOG_DEBUG_PLAYER("Seek to %1 (%2accurate)", to_string(time), accurate ? "" : "in");
1356
1357         if (_suspended) {
1358                 /* We can't seek in this state */
1359                 return;
1360         }
1361
1362         auto film = _film.lock();
1363         if (!film) {
1364                 return;
1365         }
1366
1367         if (_shuffler) {
1368                 _shuffler->clear ();
1369         }
1370
1371         _delay.clear ();
1372
1373         if (_audio_processor) {
1374                 _audio_processor->flush ();
1375         }
1376
1377         _audio_merger.clear ();
1378         std::for_each(_active_texts.begin(), _active_texts.end(), [](ActiveText& a) { a.clear(); });
1379
1380         for (auto i: _pieces) {
1381                 if (time < i->content->position()) {
1382                         /* Before; seek to the start of the content.  Even if this request is for an inaccurate seek
1383                            we must seek this (following) content accurately, otherwise when we come to the end of the current
1384                            content we may not start right at the beginning of the next, causing a gap (if the next content has
1385                            been trimmed to a point between keyframes, or something).
1386                         */
1387                         i->decoder->seek (dcp_to_content_time (i, i->content->position()), true);
1388                         i->done = false;
1389                 } else if (i->content->position() <= time && time < i->content->end(film)) {
1390                         /* During; seek to position */
1391                         i->decoder->seek (dcp_to_content_time (i, time), accurate);
1392                         i->done = false;
1393                 } else {
1394                         /* After; this piece is done */
1395                         i->done = true;
1396                 }
1397         }
1398
1399         if (accurate) {
1400                 _next_video_time = time;
1401                 _next_audio_time = time;
1402         } else {
1403                 _next_video_time = boost::none;
1404                 _next_audio_time = boost::none;
1405         }
1406
1407         _black.set_position (time);
1408         _silent.set_position (time);
1409
1410         _last_video[Eyes::LEFT] = {};
1411         _last_video[Eyes::RIGHT] = {};
1412         _last_video[Eyes::BOTH] = {};
1413
1414         for (auto& state: _stream_states) {
1415                 state.second.last_push_end = boost::none;
1416         }
1417 }
1418
1419
1420 void
1421 Player::emit_video(shared_ptr<PlayerVideo> pv, DCPTime time)
1422 {
1423         if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
1424                 std::for_each(_active_texts.begin(), _active_texts.end(), [time](ActiveText& a) { a.clear_before(time); });
1425         }
1426
1427         auto subtitles = open_subtitles_for_frame (time);
1428         if (subtitles) {
1429                 pv->set_text (subtitles.get ());
1430         }
1431
1432         Video (pv, time);
1433 }
1434
1435
1436 void
1437 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1438 {
1439         auto film = _film.lock();
1440         DCPOMATIC_ASSERT(film);
1441
1442         /* Log if the assert below is about to fail */
1443         if (_next_audio_time && labs(time.get() - _next_audio_time->get()) > 1) {
1444                 film->log()->log(String::compose("Out-of-sequence emit %1 vs %2", to_string(time), to_string(*_next_audio_time)), LogEntry::TYPE_WARNING);
1445         }
1446
1447         /* This audio must follow on from the previous, allowing for half a sample (at 48kHz) leeway */
1448         DCPOMATIC_ASSERT (!_next_audio_time || labs(time.get() - _next_audio_time->get()) < 2);
1449         Audio(data, time, film->audio_frame_rate());
1450         _next_audio_time = time + DCPTime::from_frames(data->frames(), film->audio_frame_rate());
1451 }
1452
1453
1454 void
1455 Player::fill_audio (DCPTimePeriod period)
1456 {
1457         auto film = _film.lock();
1458         DCPOMATIC_ASSERT(film);
1459
1460         if (period.from == period.to) {
1461                 return;
1462         }
1463
1464         DCPOMATIC_ASSERT (period.from < period.to);
1465
1466         DCPTime t = period.from;
1467         while (t < period.to) {
1468                 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
1469                 Frame const samples = block.frames_round(film->audio_frame_rate());
1470                 if (samples) {
1471                         auto silence = make_shared<AudioBuffers>(film->audio_channels(), samples);
1472                         silence->make_silent ();
1473                         emit_audio (silence, t);
1474                 }
1475                 t += block;
1476         }
1477 }
1478
1479
1480 DCPTime
1481 Player::one_video_frame () const
1482 {
1483         auto film = _film.lock();
1484         DCPOMATIC_ASSERT(film);
1485
1486         return DCPTime::from_frames(1, film->video_frame_rate ());
1487 }
1488
1489
1490 pair<shared_ptr<AudioBuffers>, DCPTime>
1491 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1492 {
1493         auto film = _film.lock();
1494         DCPOMATIC_ASSERT(film);
1495
1496         auto const discard_time = discard_to - time;
1497         auto const discard_frames = discard_time.frames_round(film->audio_frame_rate());
1498         auto remaining_frames = audio->frames() - discard_frames;
1499         if (remaining_frames <= 0) {
1500                 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1501         }
1502         auto cut = make_shared<AudioBuffers>(audio, remaining_frames, discard_frames);
1503         return make_pair(cut, time + discard_time);
1504 }
1505
1506
1507 void
1508 Player::set_dcp_decode_reduction (optional<int> reduction)
1509 {
1510         ChangeSignaller<Player, int> cc(this, PlayerProperty::DCP_DECODE_REDUCTION);
1511
1512         if (reduction == _dcp_decode_reduction.load()) {
1513                 cc.abort();
1514                 return;
1515         }
1516
1517         _dcp_decode_reduction = reduction;
1518         setup_pieces();
1519 }
1520
1521
1522 optional<DCPTime>
1523 Player::content_time_to_dcp (shared_ptr<const Content> content, ContentTime t) const
1524 {
1525         boost::mutex::scoped_lock lm (_mutex);
1526
1527         for (auto i: _pieces) {
1528                 if (i->content == content) {
1529                         return content_time_to_dcp (i, t);
1530                 }
1531         }
1532
1533         /* We couldn't find this content; perhaps things are being changed over */
1534         return {};
1535 }
1536
1537
1538 optional<ContentTime>
1539 Player::dcp_to_content_time (shared_ptr<const Content> content, DCPTime t) const
1540 {
1541         boost::mutex::scoped_lock lm (_mutex);
1542
1543         for (auto i: _pieces) {
1544                 if (i->content == content) {
1545                         return dcp_to_content_time (i, t);
1546                 }
1547         }
1548
1549         /* We couldn't find this content; perhaps things are being changed over */
1550         return {};
1551 }
1552
1553
1554 shared_ptr<const Playlist>
1555 Player::playlist () const
1556 {
1557         auto film = _film.lock();
1558         if (!film) {
1559                 return {};
1560         }
1561
1562         return _playlist ? _playlist : film->playlist();
1563 }
1564
1565
1566 void
1567 Player::atmos (weak_ptr<Piece> weak_piece, ContentAtmos data)
1568 {
1569         if (_suspended) {
1570                 return;
1571         }
1572
1573         auto film = _film.lock();
1574         DCPOMATIC_ASSERT(film);
1575
1576         auto piece = weak_piece.lock ();
1577         DCPOMATIC_ASSERT (piece);
1578
1579         auto const vfr = film->video_frame_rate();
1580
1581         DCPTime const dcp_time = DCPTime::from_frames(data.frame, vfr) - DCPTime(piece->content->trim_start(), FrameRateChange(vfr, vfr));
1582         if (dcp_time < piece->content->position() || dcp_time >= (piece->content->end(film))) {
1583                 return;
1584         }
1585
1586         auto ignore_atmos = std::find_if(
1587                 piece->ignore_atmos.begin(),
1588                 piece->ignore_atmos.end(),
1589                 [dcp_time](DCPTimePeriod period) { return period.contains(dcp_time); }
1590                 );
1591         if (ignore_atmos != piece->ignore_atmos.end()) {
1592                 return;
1593         }
1594
1595         Atmos (data.data, dcp_time, data.metadata);
1596 }
1597
1598
1599 void
1600 Player::signal_change(ChangeType type, int property)
1601 {
1602         Change(type, property, false);
1603 }
1604
1605
1606 /** Must be called from the same thread that calls ::pass() */
1607 void
1608 Player::set_disable_audio_processor()
1609 {
1610         _disable_audio_processor = true;
1611 }
1612