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, Film::Property::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, Film::Property 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 == Film::Property::CONTAINER) {
 497                 Change (type, PlayerProperty::FILM_CONTAINER, false);
 498         } else if (p == Film::Property::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 == Film::Property::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 == Film::Property::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                 emit_video (black_player_video_frame(Eyes::BOTH), _black.position());
 774                 _black.set_position (_black.position() + one_video_frame());
 775                 break;
 776         case SILENT:
 777         {
 778                 LOG_DEBUG_PLAYER ("Emit silence for gap at %1", to_string(_silent.position()));
 779                 DCPTimePeriod period (_silent.period_at_position());
 780                 if (_next_audio_time) {
 781                         /* Sometimes the thing that happened last finishes fractionally before
 782                            or after this silence.  Bodge the start time of the silence to fix it.
 783                            I think this is nothing to worry about since we will just add or
 784                            remove a little silence at the end of some content.
 785                         */
 786                         int64_t const error = labs(period.from.get() - _next_audio_time->get());
 787                         /* Let's not worry about less than a frame at 24fps */
 788                         int64_t const too_much_error = DCPTime::from_frames(1, 24).get();
 789                         if (error >= too_much_error) {
 790                                 film->log()->log(String::compose("Silence starting before or after last audio by %1", error), LogEntry::TYPE_ERROR);
 791                         }
 792                         DCPOMATIC_ASSERT (error < too_much_error);
 793                         period.from = *_next_audio_time;
 794                 }
 795                 if (period.duration() > one_video_frame()) {
 796                         period.to = period.from + one_video_frame();
 797                 }
 798                 fill_audio (period);
 799                 _silent.set_position (period.to);
 800                 break;
 801         }
 802         case NONE:
 803                 done = true;
 804                 break;
 805         }
 806
 807         /* Emit any audio that is ready */
 808
 809         /* Work out the time before which the audio is definitely all here.  This is the earliest last_push_end of one
 810            of our streams, or the position of the _silent.  First, though we choose only streams that are less than
 811            ignore_streams_behind seconds behind the furthest ahead (we assume that if a stream has fallen that far
 812            behind it has finished).  This is so that we don't withhold audio indefinitely awaiting data from a stream
 813            that will never come, causing bugs like #2101.
 814         */
 815         constexpr int ignore_streams_behind = 5;
 816
 817         using state_pair = std::pair<AudioStreamPtr, StreamState>;
 818
 819         /* Find streams that have pushed */
 820         std::vector<state_pair> have_pushed;
 821         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); });
 822
 823         /* Find the 'leading' stream (i.e. the one that pushed data most recently) */
 824         auto latest_last_push_end = std::max_element(
 825                 have_pushed.begin(),
 826                 have_pushed.end(),
 827                 [](state_pair const& a, state_pair const& b) { return a.second.last_push_end.get() < b.second.last_push_end.get(); }
 828                 );
 829
 830         if (latest_last_push_end != have_pushed.end()) {
 831                 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()));
 832         }
 833
 834         /* Now make a list of those streams that are less than ignore_streams_behind behind the leader */
 835         std::map<AudioStreamPtr, StreamState> alive_stream_states;
 836         for (auto const& i: _stream_states) {
 837                 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)) {
 838                         alive_stream_states.insert(i);
 839                 } else {
 840                         LOG_DEBUG_PLAYER("Ignoring stream %1 because it is too far behind", i.second.piece->content->path(0));
 841                 }
 842         }
 843
 844         auto pull_to = _playback_length.load();
 845         for (auto const& i: alive_stream_states) {
 846                 auto position = i.second.last_push_end.get_value_or(i.second.piece->content->position());
 847                 if (!i.second.piece->done && position < pull_to) {
 848                         pull_to = position;
 849                 }
 850         }
 851         if (!_silent.done() && _silent.position() < pull_to) {
 852                 pull_to = _silent.position();
 853         }
 854
 855         LOG_DEBUG_PLAYER("Emitting audio up to %1", to_string(pull_to));
 856         auto audio = _audio_merger.pull (pull_to);
 857         for (auto i = audio.begin(); i != audio.end(); ++i) {
 858                 if (_next_audio_time && i->second < *_next_audio_time) {
 859                         /* This new data comes before the last we emitted (or the last seek); discard it */
 860                         auto cut = discard_audio (i->first, i->second, *_next_audio_time);
 861                         if (!cut.first) {
 862                                 continue;
 863                         }
 864                         *i = cut;
 865                 } else if (_next_audio_time && i->second > *_next_audio_time) {
 866                         /* There's a gap between this data and the last we emitted; fill with silence */
 867                         fill_audio (DCPTimePeriod (*_next_audio_time, i->second));
 868                 }
 869
 870                 emit_audio (i->first, i->second);
 871         }
 872
 873         if (done) {
 874                 if (_shuffler) {
 875                         _shuffler->flush ();
 876                 }
 877                 for (auto const& i: _delay) {
 878                         do_emit_video(i.first, i.second);
 879                 }
 880
 881                 /* Perhaps we should have Empty entries for both eyes in the 3D case (somehow).
 882                  * However, if we have L and R video files, and one is shorter than the other,
 883                  * the fill code in ::video mostly takes care of filling in the gaps.
 884                  * However, since it fills at the point when it knows there is more video coming
 885                  * at time t (so it should fill any gap up to t) it can't do anything right at the
 886                  * end.  This is particularly bad news if the last frame emitted is a LEFT
 887                  * eye, as the MXF writer will complain about the 3D sequence being wrong.
 888                  * Here's a hack to workaround that particular case.
 889                  */
 890                 if (_next_video_eyes && _next_video_time && *_next_video_eyes == Eyes::RIGHT) {
 891                         do_emit_video (black_player_video_frame(Eyes::RIGHT), *_next_video_time);
 892                 }
 893         }
 894
 895         return done;
 896 }
 897
 898
 899 /** @return Open subtitles for the frame at the given time, converted to images */
 900 optional<PositionImage>
 901 Player::open_subtitles_for_frame (DCPTime time) const
 902 {
 903         auto film = _film.lock();
 904         if (!film) {
 905                 return {};
 906         }
 907
 908         list<PositionImage> captions;
 909         int const vfr = film->video_frame_rate();
 910
 911         for (
 912                 auto j:
 913                 _active_texts[TextType::OPEN_SUBTITLE].get_burnt(DCPTimePeriod(time, time + DCPTime::from_frames(1, vfr)), _always_burn_open_subtitles)
 914                 ) {
 915
 916                 /* Bitmap subtitles */
 917                 for (auto i: j.bitmap) {
 918                         if (!i.image) {
 919                                 continue;
 920                         }
 921
 922                         /* i.image will already have been scaled to fit _video_container_size */
 923                         dcp::Size scaled_size (i.rectangle.width * _video_container_size.load().width, i.rectangle.height * _video_container_size.load().height);
 924
 925                         captions.push_back (
 926                                 PositionImage (
 927                                         i.image,
 928                                         Position<int> (
 929                                                 lrint(_video_container_size.load().width * i.rectangle.x),
 930                                                 lrint(_video_container_size.load().height * i.rectangle.y)
 931                                                 )
 932                                         )
 933                                 );
 934                 }
 935
 936                 /* String subtitles (rendered to an image) */
 937                 if (!j.string.empty()) {
 938                         auto s = render_text(j.string, _video_container_size, time, vfr);
 939                         copy (s.begin(), s.end(), back_inserter (captions));
 940                 }
 941         }
 942
 943         if (captions.empty()) {
 944                 return {};
 945         }
 946
 947         return merge (captions, _subtitle_alignment);
 948 }
 949
 950
 951 static
 952 Eyes
 953 increment_eyes (Eyes e)
 954 {
 955         if (e == Eyes::LEFT) {
 956                 return Eyes::RIGHT;
 957         }
 958
 959         return Eyes::LEFT;
 960 }
 961
 962
 963 void
 964 Player::video (weak_ptr<Piece> weak_piece, ContentVideo video)
 965 {
 966         if (_suspended) {
 967                 return;
 968         }
 969
 970         auto piece = weak_piece.lock ();
 971         if (!piece) {
 972                 return;
 973         }
 974
 975         if (!piece->content->video->use()) {
 976                 return;
 977         }
 978
 979         auto film = _film.lock();
 980         if (!film) {
 981                 return;
 982         }
 983
 984         FrameRateChange frc(film, piece->content);
 985         if (frc.skip && (video.frame % 2) == 1) {
 986                 return;
 987         }
 988
 989         vector<Eyes> eyes_to_emit;
 990
 991         if (!film->three_d()) {
 992                 if (video.eyes == Eyes::RIGHT) {
 993                         /* 2D film, 3D content: discard right */
 994                         return;
 995                 } else if (video.eyes == Eyes::LEFT) {
 996                         /* 2D film, 3D content: emit left as "both" */
 997                         video.eyes = Eyes::BOTH;
 998                         eyes_to_emit = { Eyes::BOTH };
 999                 }
1000         } else {
1001                 if (video.eyes == Eyes::BOTH) {
1002                         /* 3D film, 2D content; emit "both" for left and right */
1003                         eyes_to_emit = { Eyes::LEFT, Eyes::RIGHT };
1004                 }
1005         }
1006
1007         if (eyes_to_emit.empty()) {
1008                 eyes_to_emit = { video.eyes };
1009         }
1010
1011         /* Time of the first frame we will emit */
1012         DCPTime const time = content_video_to_dcp (piece, video.frame);
1013         LOG_DEBUG_PLAYER("Received video frame %1 at %2", video.frame, to_string(time));
1014
1015         /* Discard if it's before the content's period or the last accurate seek.  We can't discard
1016            if it's after the content's period here as in that case we still need to fill any gap between
1017            `now' and the end of the content's period.
1018         */
1019         if (time < piece->content->position() || (_next_video_time && time < *_next_video_time)) {
1020                 return;
1021         }
1022
1023         auto ignore_video = std::find_if(
1024                 piece->ignore_video.begin(),
1025                 piece->ignore_video.end(),
1026                 [time](DCPTimePeriod period) { return period.contains(time); }
1027                 );
1028         if (ignore_video != piece->ignore_video.end()) {
1029                 return;
1030         }
1031
1032         /* Fill gaps that we discover now that we have some video which needs to be emitted.
1033            This is where we need to fill to.
1034         */
1035         DCPTime fill_to = min(time, piece->content->end(film));
1036
1037         if (_next_video_time) {
1038                 DCPTime fill_from = max (*_next_video_time, piece->content->position());
1039
1040                 /* Fill if we have more than half a frame to do */
1041                 if ((fill_to - fill_from) > one_video_frame() / 2) {
1042                         auto last = _last_video.find (weak_piece);
1043                         if (film->three_d()) {
1044                                 auto fill_to_eyes = eyes_to_emit[0];
1045                                 if (fill_to_eyes == Eyes::BOTH) {
1046                                         fill_to_eyes = Eyes::LEFT;
1047                                 }
1048                                 if (fill_to == piece->content->end(film)) {
1049                                         /* Don't fill after the end of the content */
1050                                         fill_to_eyes = Eyes::LEFT;
1051                                 }
1052                                 auto j = fill_from;
1053                                 auto eyes = _next_video_eyes.get_value_or(Eyes::LEFT);
1054                                 if (eyes == Eyes::BOTH) {
1055                                         eyes = Eyes::LEFT;
1056                                 }
1057                                 while (j < fill_to || eyes != fill_to_eyes) {
1058                                         if (last != _last_video.end()) {
1059                                                 LOG_DEBUG_PLAYER("Fill using last video at %1 in 3D mode", to_string(j));
1060                                                 auto copy = last->second->shallow_copy();
1061                                                 copy->set_eyes (eyes);
1062                                                 emit_video (copy, j);
1063                                         } else {
1064                                                 LOG_DEBUG_PLAYER("Fill using black at %1 in 3D mode", to_string(j));
1065                                                 emit_video (black_player_video_frame(eyes), j);
1066                                         }
1067                                         if (eyes == Eyes::RIGHT) {
1068                                                 j += one_video_frame();
1069                                         }
1070                                         eyes = increment_eyes (eyes);
1071                                 }
1072                         } else {
1073                                 for (DCPTime j = fill_from; j < fill_to; j += one_video_frame()) {
1074                                         if (last != _last_video.end()) {
1075                                                 emit_video (last->second, j);
1076                                         } else {
1077                                                 emit_video (black_player_video_frame(Eyes::BOTH), j);
1078                                         }
1079                                 }
1080                         }
1081                 }
1082         }
1083
1084         auto const content_video = piece->content->video;
1085
1086         for (auto eyes: eyes_to_emit) {
1087                 _last_video[weak_piece] = std::make_shared<PlayerVideo>(
1088                         video.image,
1089                         content_video->actual_crop(),
1090                         content_video->fade(film, video.frame),
1091                         scale_for_display(
1092                                 content_video->scaled_size(film->frame_size()),
1093                                 _video_container_size,
1094                                 film->frame_size(),
1095                                 content_video->pixel_quanta()
1096                                 ),
1097                         _video_container_size,
1098                         eyes,
1099                         video.part,
1100                         content_video->colour_conversion(),
1101                         content_video->range(),
1102                         piece->content,
1103                         video.frame,
1104                         false
1105                         );
1106
1107                 DCPTime t = time;
1108                 for (int i = 0; i < frc.repeat; ++i) {
1109                         if (t < piece->content->end(film)) {
1110                                 emit_video (_last_video[weak_piece], t);
1111                         }
1112                         t += one_video_frame ();
1113                 }
1114         }
1115 }
1116
1117
1118 void
1119 Player::audio (weak_ptr<Piece> weak_piece, AudioStreamPtr stream, ContentAudio content_audio)
1120 {
1121         if (_suspended) {
1122                 return;
1123         }
1124
1125         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1126
1127         auto piece = weak_piece.lock ();
1128         if (!piece) {
1129                 return;
1130         }
1131
1132         auto film = _film.lock();
1133         if (!film) {
1134                 return;
1135         }
1136
1137         auto content = piece->content->audio;
1138         DCPOMATIC_ASSERT (content);
1139
1140         int const rfr = content->resampled_frame_rate(film);
1141
1142         /* Compute time in the DCP */
1143         auto time = resampled_audio_to_dcp (piece, content_audio.frame);
1144
1145         /* And the end of this block in the DCP */
1146         auto end = time + DCPTime::from_frames(content_audio.audio->frames(), rfr);
1147         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());
1148
1149         /* Remove anything that comes before the start or after the end of the content */
1150         if (time < piece->content->position()) {
1151                 auto cut = discard_audio (content_audio.audio, time, piece->content->position());
1152                 if (!cut.first) {
1153                         /* This audio is entirely discarded */
1154                         return;
1155                 }
1156                 content_audio.audio = cut.first;
1157                 time = cut.second;
1158         } else if (time > piece->content->end(film)) {
1159                 /* Discard it all */
1160                 return;
1161         } else if (end > piece->content->end(film)) {
1162                 Frame const remaining_frames = DCPTime(piece->content->end(film) - time).frames_round(rfr);
1163                 if (remaining_frames == 0) {
1164                         return;
1165                 }
1166                 content_audio.audio = make_shared<AudioBuffers>(content_audio.audio, remaining_frames, 0);
1167         }
1168
1169         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1170
1171         /* Gain and fade */
1172
1173         auto const fade_coeffs = content->fade (stream, content_audio.frame, content_audio.audio->frames(), rfr);
1174         if (content->gain() != 0 || !fade_coeffs.empty()) {
1175                 auto gain_buffers = make_shared<AudioBuffers>(content_audio.audio);
1176                 if (!fade_coeffs.empty()) {
1177                         /* Apply both fade and gain */
1178                         DCPOMATIC_ASSERT (fade_coeffs.size() == static_cast<size_t>(gain_buffers->frames()));
1179                         auto const channels = gain_buffers->channels();
1180                         auto const frames = fade_coeffs.size();
1181                         auto data = gain_buffers->data();
1182                         auto const gain = db_to_linear (content->gain());
1183                         for (auto channel = 0; channel < channels; ++channel) {
1184                                 for (auto frame = 0U; frame < frames; ++frame) {
1185                                         data[channel][frame] *= gain * fade_coeffs[frame];
1186                                 }
1187                         }
1188                 } else {
1189                         /* Just apply gain */
1190                         gain_buffers->apply_gain (content->gain());
1191                 }
1192                 content_audio.audio = gain_buffers;
1193         }
1194
1195         /* Remap */
1196
1197         content_audio.audio = remap(content_audio.audio, film->audio_channels(), stream->mapping());
1198
1199         /* Process */
1200
1201         if (_audio_processor) {
1202                 content_audio.audio = _audio_processor->run(content_audio.audio, film->audio_channels());
1203         }
1204
1205         /* Push */
1206
1207         _audio_merger.push (content_audio.audio, time);
1208         DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
1209         _stream_states[stream].last_push_end = time + DCPTime::from_frames(content_audio.audio->frames(), film->audio_frame_rate());
1210 }
1211
1212
1213 void
1214 Player::bitmap_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentBitmapText subtitle)
1215 {
1216         if (_suspended) {
1217                 return;
1218         }
1219
1220         auto piece = weak_piece.lock ();
1221         auto content = weak_content.lock ();
1222         if (!piece || !content) {
1223                 return;
1224         }
1225
1226         PlayerText ps;
1227         for (auto& sub: subtitle.subs)
1228         {
1229                 /* Apply content's subtitle offsets */
1230                 sub.rectangle.x += content->x_offset ();
1231                 sub.rectangle.y += content->y_offset ();
1232
1233                 /* Apply a corrective translation to keep the subtitle centred after the scale that is coming up */
1234                 sub.rectangle.x -= sub.rectangle.width * ((content->x_scale() - 1) / 2);
1235                 sub.rectangle.y -= sub.rectangle.height * ((content->y_scale() - 1) / 2);
1236
1237                 /* Apply content's subtitle scale */
1238                 sub.rectangle.width *= content->x_scale ();
1239                 sub.rectangle.height *= content->y_scale ();
1240
1241                 auto image = sub.image;
1242
1243                 /* We will scale the subtitle up to fit _video_container_size */
1244                 int const width = sub.rectangle.width * _video_container_size.load().width;
1245                 int const height = sub.rectangle.height * _video_container_size.load().height;
1246                 if (width == 0 || height == 0) {
1247                         return;
1248                 }
1249
1250                 dcp::Size scaled_size (width, height);
1251                 ps.bitmap.push_back (BitmapText(image->scale(scaled_size, dcp::YUVToRGB::REC601, image->pixel_format(), Image::Alignment::PADDED, _fast), sub.rectangle));
1252         }
1253
1254         DCPTime from(content_time_to_dcp(piece, subtitle.from()));
1255         _active_texts[content->type()].add_from(weak_content, ps, from);
1256 }
1257
1258
1259 void
1260 Player::plain_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentStringText subtitle)
1261 {
1262         if (_suspended) {
1263                 return;
1264         }
1265
1266         auto piece = weak_piece.lock ();
1267         auto content = weak_content.lock ();
1268         auto film = _film.lock();
1269         if (!piece || !content || !film) {
1270                 return;
1271         }
1272
1273         PlayerText ps;
1274         DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
1275
1276         if (from > piece->content->end(film)) {
1277                 return;
1278         }
1279
1280         for (auto s: subtitle.subs) {
1281                 s.set_h_position (s.h_position() + content->x_offset());
1282                 s.set_v_position (s.v_position() + content->y_offset());
1283                 float const xs = content->x_scale();
1284                 float const ys = content->y_scale();
1285                 float size = s.size();
1286
1287                 /* Adjust size to express the common part of the scaling;
1288                    e.g. if xs = ys = 0.5 we scale size by 2.
1289                 */
1290                 if (xs > 1e-5 && ys > 1e-5) {
1291                         size *= 1 / min (1 / xs, 1 / ys);
1292                 }
1293                 s.set_size (size);
1294
1295                 /* Then express aspect ratio changes */
1296                 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
1297                         s.set_aspect_adjust (xs / ys);
1298                 }
1299
1300                 s.set_in (dcp::Time(from.seconds(), 1000));
1301                 ps.string.push_back (s);
1302         }
1303
1304         _active_texts[content->type()].add_from(weak_content, ps, from);
1305 }
1306
1307
1308 void
1309 Player::subtitle_stop (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentTime to)
1310 {
1311         if (_suspended) {
1312                 return;
1313         }
1314
1315         auto content = weak_content.lock ();
1316         if (!content) {
1317                 return;
1318         }
1319
1320         if (!_active_texts[content->type()].have(weak_content)) {
1321                 return;
1322         }
1323
1324         auto piece = weak_piece.lock ();
1325         auto film = _film.lock();
1326         if (!piece || !film) {
1327                 return;
1328         }
1329
1330         DCPTime const dcp_to = content_time_to_dcp (piece, to);
1331
1332         if (dcp_to > piece->content->end(film)) {
1333                 return;
1334         }
1335
1336         auto from = _active_texts[content->type()].add_to(weak_content, dcp_to);
1337
1338         bool const always = (content->type() == TextType::OPEN_SUBTITLE && _always_burn_open_subtitles);
1339         if (content->use() && !always && !content->burn()) {
1340                 Text (from.first, content->type(), content->dcp_track().get_value_or(DCPTextTrack()), DCPTimePeriod(from.second, dcp_to));
1341         }
1342 }
1343
1344
1345 void
1346 Player::seek (DCPTime time, bool accurate)
1347 {
1348         boost::mutex::scoped_lock lm (_mutex);
1349         LOG_DEBUG_PLAYER("Seek to %1 (%2accurate)", to_string(time), accurate ? "" : "in");
1350
1351         if (_suspended) {
1352                 /* We can't seek in this state */
1353                 return;
1354         }
1355
1356         auto film = _film.lock();
1357         if (!film) {
1358                 return;
1359         }
1360
1361         if (_shuffler) {
1362                 _shuffler->clear ();
1363         }
1364
1365         _delay.clear ();
1366
1367         if (_audio_processor) {
1368                 _audio_processor->flush ();
1369         }
1370
1371         _audio_merger.clear ();
1372         std::for_each(_active_texts.begin(), _active_texts.end(), [](ActiveText& a) { a.clear(); });
1373
1374         for (auto i: _pieces) {
1375                 if (time < i->content->position()) {
1376                         /* Before; seek to the start of the content.  Even if this request is for an inaccurate seek
1377                            we must seek this (following) content accurately, otherwise when we come to the end of the current
1378                            content we may not start right at the beginning of the next, causing a gap (if the next content has
1379                            been trimmed to a point between keyframes, or something).
1380                         */
1381                         i->decoder->seek (dcp_to_content_time (i, i->content->position()), true);
1382                         i->done = false;
1383                 } else if (i->content->position() <= time && time < i->content->end(film)) {
1384                         /* During; seek to position */
1385                         i->decoder->seek (dcp_to_content_time (i, time), accurate);
1386                         i->done = false;
1387                 } else {
1388                         /* After; this piece is done */
1389                         i->done = true;
1390                 }
1391         }
1392
1393         if (accurate) {
1394                 _next_video_time = time;
1395                 _next_video_eyes = Eyes::LEFT;
1396                 _next_audio_time = time;
1397         } else {
1398                 _next_video_time = boost::none;
1399                 _next_video_eyes = boost::none;
1400                 _next_audio_time = boost::none;
1401         }
1402
1403         _black.set_position (time);
1404         _silent.set_position (time);
1405
1406         _last_video.clear ();
1407
1408         for (auto& state: _stream_states) {
1409                 state.second.last_push_end = boost::none;
1410         }
1411 }
1412
1413
1414 void
1415 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1416 {
1417         auto film = _film.lock();
1418         DCPOMATIC_ASSERT(film);
1419
1420         if (!film->three_d()) {
1421                 if (pv->eyes() == Eyes::LEFT) {
1422                         /* Use left-eye images for both eyes... */
1423                         pv->set_eyes (Eyes::BOTH);
1424                 } else if (pv->eyes() == Eyes::RIGHT) {
1425                         /* ...and discard the right */
1426                         return;
1427                 }
1428         }
1429
1430         /* We need a delay to give a little wiggle room to ensure that relevant subtitles arrive at the
1431            player before the video that requires them.
1432         */
1433         _delay.push_back (make_pair (pv, time));
1434
1435         if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
1436                 _next_video_time = time + one_video_frame();
1437         }
1438         _next_video_eyes = increment_eyes (pv->eyes());
1439
1440         if (_delay.size() < 3) {
1441                 return;
1442         }
1443
1444         auto to_do = _delay.front();
1445         _delay.pop_front();
1446         do_emit_video (to_do.first, to_do.second);
1447 }
1448
1449
1450 void
1451 Player::do_emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1452 {
1453         if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
1454                 std::for_each(_active_texts.begin(), _active_texts.end(), [time](ActiveText& a) { a.clear_before(time); });
1455         }
1456
1457         auto subtitles = open_subtitles_for_frame (time);
1458         if (subtitles) {
1459                 pv->set_text (subtitles.get ());
1460         }
1461
1462         Video (pv, time);
1463 }
1464
1465
1466 void
1467 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1468 {
1469         auto film = _film.lock();
1470         DCPOMATIC_ASSERT(film);
1471
1472         /* Log if the assert below is about to fail */
1473         if (_next_audio_time && labs(time.get() - _next_audio_time->get()) > 1) {
1474                 film->log()->log(String::compose("Out-of-sequence emit %1 vs %2", to_string(time), to_string(*_next_audio_time)), LogEntry::TYPE_WARNING);
1475         }
1476
1477         /* This audio must follow on from the previous, allowing for half a sample (at 48kHz) leeway */
1478         DCPOMATIC_ASSERT (!_next_audio_time || labs(time.get() - _next_audio_time->get()) < 2);
1479         Audio(data, time, film->audio_frame_rate());
1480         _next_audio_time = time + DCPTime::from_frames(data->frames(), film->audio_frame_rate());
1481 }
1482
1483
1484 void
1485 Player::fill_audio (DCPTimePeriod period)
1486 {
1487         auto film = _film.lock();
1488         DCPOMATIC_ASSERT(film);
1489
1490         if (period.from == period.to) {
1491                 return;
1492         }
1493
1494         DCPOMATIC_ASSERT (period.from < period.to);
1495
1496         DCPTime t = period.from;
1497         while (t < period.to) {
1498                 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
1499                 Frame const samples = block.frames_round(film->audio_frame_rate());
1500                 if (samples) {
1501                         auto silence = make_shared<AudioBuffers>(film->audio_channels(), samples);
1502                         silence->make_silent ();
1503                         emit_audio (silence, t);
1504                 }
1505                 t += block;
1506         }
1507 }
1508
1509
1510 DCPTime
1511 Player::one_video_frame () const
1512 {
1513         auto film = _film.lock();
1514         DCPOMATIC_ASSERT(film);
1515
1516         return DCPTime::from_frames(1, film->video_frame_rate ());
1517 }
1518
1519
1520 pair<shared_ptr<AudioBuffers>, DCPTime>
1521 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1522 {
1523         auto film = _film.lock();
1524         DCPOMATIC_ASSERT(film);
1525
1526         auto const discard_time = discard_to - time;
1527         auto const discard_frames = discard_time.frames_round(film->audio_frame_rate());
1528         auto remaining_frames = audio->frames() - discard_frames;
1529         if (remaining_frames <= 0) {
1530                 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1531         }
1532         auto cut = make_shared<AudioBuffers>(audio, remaining_frames, discard_frames);
1533         return make_pair(cut, time + discard_time);
1534 }
1535
1536
1537 void
1538 Player::set_dcp_decode_reduction (optional<int> reduction)
1539 {
1540         ChangeSignaller<Player, int> cc(this, PlayerProperty::DCP_DECODE_REDUCTION);
1541
1542         if (reduction == _dcp_decode_reduction.load()) {
1543                 cc.abort();
1544                 return;
1545         }
1546
1547         _dcp_decode_reduction = reduction;
1548         setup_pieces();
1549 }
1550
1551
1552 optional<DCPTime>
1553 Player::content_time_to_dcp (shared_ptr<const Content> content, ContentTime t) const
1554 {
1555         boost::mutex::scoped_lock lm (_mutex);
1556
1557         for (auto i: _pieces) {
1558                 if (i->content == content) {
1559                         return content_time_to_dcp (i, t);
1560                 }
1561         }
1562
1563         /* We couldn't find this content; perhaps things are being changed over */
1564         return {};
1565 }
1566
1567
1568 optional<ContentTime>
1569 Player::dcp_to_content_time (shared_ptr<const Content> content, DCPTime t) const
1570 {
1571         boost::mutex::scoped_lock lm (_mutex);
1572
1573         for (auto i: _pieces) {
1574                 if (i->content == content) {
1575                         return dcp_to_content_time (i, t);
1576                 }
1577         }
1578
1579         /* We couldn't find this content; perhaps things are being changed over */
1580         return {};
1581 }
1582
1583
1584 shared_ptr<const Playlist>
1585 Player::playlist () const
1586 {
1587         auto film = _film.lock();
1588         if (!film) {
1589                 return {};
1590         }
1591
1592         return _playlist ? _playlist : film->playlist();
1593 }
1594
1595
1596 void
1597 Player::atmos (weak_ptr<Piece> weak_piece, ContentAtmos data)
1598 {
1599         if (_suspended) {
1600                 return;
1601         }
1602
1603         auto film = _film.lock();
1604         DCPOMATIC_ASSERT(film);
1605
1606         auto piece = weak_piece.lock ();
1607         DCPOMATIC_ASSERT (piece);
1608
1609         auto const vfr = film->video_frame_rate();
1610
1611         DCPTime const dcp_time = DCPTime::from_frames(data.frame, vfr) - DCPTime(piece->content->trim_start(), FrameRateChange(vfr, vfr));
1612         if (dcp_time < piece->content->position() || dcp_time >= (piece->content->end(film))) {
1613                 return;
1614         }
1615
1616         auto ignore_atmos = std::find_if(
1617                 piece->ignore_atmos.begin(),
1618                 piece->ignore_atmos.end(),
1619                 [dcp_time](DCPTimePeriod period) { return period.contains(dcp_time); }
1620                 );
1621         if (ignore_atmos != piece->ignore_atmos.end()) {
1622                 return;
1623         }
1624
1625         Atmos (data.data, dcp_time, data.metadata);
1626 }
1627
1628
1629 void
1630 Player::signal_change(ChangeType type, int property)
1631 {
1632         Change(type, property, false);
1633 }
1634