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