src/lib/player.cc

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