src/lib/player.cc

   1 /*
   2     Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21
  22 #include "atmos_decoder.h"
  23 #include "audio_buffers.h"
  24 #include "audio_content.h"
  25 #include "audio_decoder.h"
  26 #include "audio_processor.h"
  27 #include "compose.hpp"
  28 #include "config.h"
  29 #include "content_audio.h"
  30 #include "content_video.h"
  31 #include "dcp_content.h"
  32 #include "dcp_decoder.h"
  33 #include "dcpomatic_log.h"
  34 #include "decoder.h"
  35 #include "decoder_factory.h"
  36 #include "ffmpeg_content.h"
  37 #include "film.h"
  38 #include "frame_rate_change.h"
  39 #include "image.h"
  40 #include "image_decoder.h"
  41 #include "job.h"
  42 #include "log.h"
  43 #include "maths_util.h"
  44 #include "piece.h"
  45 #include "player.h"
  46 #include "player_video.h"
  47 #include "playlist.h"
  48 #include "ratio.h"
  49 #include "raw_image_proxy.h"
  50 #include "render_text.h"
  51 #include "shuffler.h"
  52 #include "text_content.h"
  53 #include "text_decoder.h"
  54 #include "timer.h"
  55 #include "video_decoder.h"
  56 #include <dcp/reel.h>
  57 #include <dcp/reel_closed_caption_asset.h>
  58 #include <dcp/reel_picture_asset.h>
  59 #include <dcp/reel_sound_asset.h>
  60 #include <dcp/reel_subtitle_asset.h>
  61 #include <algorithm>
  62 #include <iostream>
  63 #include <stdint.h>
  64
  65 #include "i18n.h"
  66
  67
  68 using std::copy;
  69 using std::cout;
  70 using std::dynamic_pointer_cast;
  71 using std::list;
  72 using std::make_pair;
  73 using std::make_shared;
  74 using std::max;
  75 using std::min;
  76 using std::pair;
  77 using std::shared_ptr;
  78 using std::vector;
  79 using std::weak_ptr;
  80 using boost::optional;
  81 using boost::scoped_ptr;
  82 #if BOOST_VERSION >= 106100
  83 using namespace boost::placeholders;
  84 #endif
  85 using namespace dcpomatic;
  86
  87
  88 int const PlayerProperty::VIDEO_CONTAINER_SIZE = 700;
  89 int const PlayerProperty::PLAYLIST = 701;
  90 int const PlayerProperty::FILM_CONTAINER = 702;
  91 int const PlayerProperty::FILM_VIDEO_FRAME_RATE = 703;
  92 int const PlayerProperty::DCP_DECODE_REDUCTION = 704;
  93 int const PlayerProperty::PLAYBACK_LENGTH = 705;
  94 int const PlayerProperty::IGNORE_VIDEO = 706;
  95 int const PlayerProperty::IGNORE_AUDIO = 707;
  96 int const PlayerProperty::IGNORE_TEXT = 708;
  97 int const PlayerProperty::ALWAYS_BURN_OPEN_SUBTITLES = 709;
  98 int const PlayerProperty::PLAY_REFERENCED = 710;
  99
 100
 101 Player::Player (shared_ptr<const Film> film, Image::Alignment subtitle_alignment)
 102         : _film (film)
 103         , _suspended (0)
 104         , _ignore_video(false)
 105         , _ignore_audio(false)
 106         , _ignore_text(false)
 107         , _always_burn_open_subtitles(false)
 108         , _fast(false)
 109         , _tolerant (film->tolerant())
 110         , _play_referenced(false)
 111         , _audio_merger(film->audio_frame_rate())
 112         , _subtitle_alignment (subtitle_alignment)
 113 {
 114         construct ();
 115 }
 116
 117
 118 Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist_)
 119         : _film (film)
 120         , _playlist (playlist_)
 121         , _suspended (0)
 122         , _ignore_video(false)
 123         , _ignore_audio(false)
 124         , _ignore_text(false)
 125         , _always_burn_open_subtitles(false)
 126         , _fast(false)
 127         , _tolerant (film->tolerant())
 128         , _play_referenced(false)
 129         , _audio_merger(film->audio_frame_rate())
 130 {
 131         construct ();
 132 }
 133
 134
 135 void
 136 Player::construct ()
 137 {
 138         auto film = _film.lock();
 139         DCPOMATIC_ASSERT(film);
 140
 141         connect();
 142         set_video_container_size(film->frame_size());
 143
 144         film_change(ChangeType::DONE, FilmProperty::AUDIO_PROCESSOR);
 145
 146         setup_pieces ();
 147         seek (DCPTime (), true);
 148 }
 149
 150
 151 void
 152 Player::connect()
 153 {
 154         auto film = _film.lock();
 155         DCPOMATIC_ASSERT(film);
 156
 157         _film_changed_connection = film->Change.connect(bind(&Player::film_change, this, _1, _2));
 158         /* The butler must hear about this first, so since we are proxying this through to the butler we must
 159            be first.
 160         */
 161         _playlist_change_connection = playlist()->Change.connect (bind (&Player::playlist_change, this, _1), boost::signals2::at_front);
 162         _playlist_content_change_connection = playlist()->ContentChange.connect (bind(&Player::playlist_content_change, this, _1, _3, _4));
 163 }
 164
 165
 166 Player::Player(Player&& other)
 167         : _film(other._film)
 168         , _playlist(std::move(other._playlist))
 169         , _suspended(other._suspended.load())
 170         , _pieces(std::move(other._pieces))
 171         , _video_container_size(other._video_container_size.load())
 172         , _black_image(std::move(other._black_image))
 173         , _ignore_video(other._ignore_video.load())
 174         , _ignore_audio(other._ignore_audio.load())
 175         , _ignore_text(other._ignore_text.load())
 176         , _always_burn_open_subtitles(other._always_burn_open_subtitles.load())
 177         , _fast(other._fast.load())
 178         , _tolerant(other._tolerant)
 179         , _play_referenced(other._play_referenced.load())
 180         , _next_video_time(other._next_video_time)
 181         , _next_audio_time(other._next_audio_time)
 182         , _dcp_decode_reduction(other._dcp_decode_reduction.load())
 183         , _last_video(std::move(other._last_video))
 184         , _audio_merger(std::move(other._audio_merger))
 185         , _shuffler(std::move(other._shuffler))
 186         , _delay(std::move(other._delay))
 187         , _stream_states(std::move(other._stream_states))
 188         , _black(std::move(other._black))
 189         , _silent(std::move(other._silent))
 190         , _active_texts(std::move(other._active_texts))
 191         , _audio_processor(std::move(other._audio_processor))
 192         , _playback_length(other._playback_length.load())
 193         , _subtitle_alignment(other._subtitle_alignment)
 194 {
 195         connect();
 196 }
 197
 198
 199 Player&
 200 Player::operator=(Player&& other)
 201 {
 202         if (this == &other) {
 203                 return *this;
 204         }
 205
 206         _film = std::move(other._film);
 207         _playlist = std::move(other._playlist);
 208         _suspended = other._suspended.load();
 209         _pieces = std::move(other._pieces);
 210         _video_container_size = other._video_container_size.load();
 211         _black_image = std::move(other._black_image);
 212         _ignore_video = other._ignore_video.load();
 213         _ignore_audio = other._ignore_audio.load();
 214         _ignore_text = other._ignore_text.load();
 215         _always_burn_open_subtitles = other._always_burn_open_subtitles.load();
 216         _fast = other._fast.load();
 217         _tolerant = other._tolerant;
 218         _play_referenced = other._play_referenced.load();
 219         _next_video_time = other._next_video_time;
 220         _next_audio_time = other._next_audio_time;
 221         _dcp_decode_reduction = other._dcp_decode_reduction.load();
 222         _last_video = std::move(other._last_video);
 223         _audio_merger = std::move(other._audio_merger);
 224         _shuffler = std::move(other._shuffler);
 225         _delay = std::move(other._delay);
 226         _stream_states = std::move(other._stream_states);
 227         _black = std::move(other._black);
 228         _silent = std::move(other._silent);
 229         _active_texts = std::move(other._active_texts);
 230         _audio_processor = std::move(other._audio_processor);
 231         _playback_length = other._playback_length.load();
 232         _subtitle_alignment = other._subtitle_alignment;
 233
 234         connect();
 235
 236         return *this;
 237 }
 238
 239
 240 bool
 241 have_video (shared_ptr<const Content> content)
 242 {
 243         return static_cast<bool>(content->video) && content->video->use() && content->can_be_played();
 244 }
 245
 246
 247 bool
 248 have_audio (shared_ptr<const Content> content)
 249 {
 250         return static_cast<bool>(content->audio) && content->can_be_played();
 251 }
 252
 253
 254 void
 255 Player::setup_pieces ()
 256 {
 257         boost::mutex::scoped_lock lm (_mutex);
 258
 259         auto old_pieces = _pieces;
 260         _pieces.clear ();
 261
 262         auto film = _film.lock();
 263         if (!film) {
 264                 return;
 265         }
 266
 267         _playback_length = _playlist ? _playlist->length(film) : film->length();
 268
 269         auto playlist_content = playlist()->content();
 270         bool const have_threed = std::any_of(
 271                 playlist_content.begin(),
 272                 playlist_content.end(),
 273                 [](shared_ptr<const Content> c) {
 274                         return c->video && (c->video->frame_type() == VideoFrameType::THREE_D_LEFT || c->video->frame_type() == VideoFrameType::THREE_D_RIGHT);
 275                 });
 276
 277
 278         if (have_threed) {
 279                 _shuffler.reset(new Shuffler());
 280                 _shuffler->Video.connect(bind(&Player::video, this, _1, _2));
 281         }
 282
 283         for (auto content: playlist()->content()) {
 284
 285                 if (!content->paths_valid()) {
 286                         continue;
 287                 }
 288
 289                 if (_ignore_video && _ignore_audio && content->text.empty()) {
 290                         /* We're only interested in text and this content has none */
 291                         continue;
 292                 }
 293
 294                 shared_ptr<Decoder> old_decoder;
 295                 for (auto j: old_pieces) {
 296                         if (j->content == content) {
 297                                 old_decoder = j->decoder;
 298                                 break;
 299                         }
 300                 }
 301
 302                 auto decoder = decoder_factory(film, content, _fast, _tolerant, old_decoder);
 303                 DCPOMATIC_ASSERT (decoder);
 304
 305                 FrameRateChange frc(film, content);
 306
 307                 if (decoder->video && _ignore_video) {
 308                         decoder->video->set_ignore (true);
 309                 }
 310
 311                 if (decoder->audio && _ignore_audio) {
 312                         decoder->audio->set_ignore (true);
 313                 }
 314
 315                 if (_ignore_text) {
 316                         for (auto i: decoder->text) {
 317                                 i->set_ignore (true);
 318                         }
 319                 }
 320
 321                 auto dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
 322                 if (dcp) {
 323                         dcp->set_decode_referenced (_play_referenced);
 324                         if (_play_referenced) {
 325                                 dcp->set_forced_reduction (_dcp_decode_reduction);
 326                         }
 327                 }
 328
 329                 auto piece = make_shared<Piece>(content, decoder, frc);
 330                 _pieces.push_back (piece);
 331
 332                 if (decoder->video) {
 333                         if (have_threed) {
 334                                 /* We need a Shuffler to cope with 3D L/R video data arriving out of sequence */
 335                                 decoder->video->Data.connect (bind(&Shuffler::video, _shuffler.get(), weak_ptr<Piece>(piece), _1));
 336                         } else {
 337                                 decoder->video->Data.connect (bind(&Player::video, this, weak_ptr<Piece>(piece), _1));
 338                         }
 339                 }
 340
 341                 if (decoder->audio) {
 342                         decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
 343                 }
 344
 345                 auto j = decoder->text.begin();
 346
 347                 while (j != decoder->text.end()) {
 348                         (*j)->BitmapStart.connect (
 349                                 bind(&Player::bitmap_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 350                                 );
 351                         (*j)->PlainStart.connect (
 352                                 bind(&Player::plain_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 353                                 );
 354                         (*j)->Stop.connect (
 355                                 bind(&Player::subtitle_stop, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 356                                 );
 357
 358                         ++j;
 359                 }
 360
 361                 if (decoder->atmos) {
 362                         decoder->atmos->Data.connect (bind(&Player::atmos, this, weak_ptr<Piece>(piece), _1));
 363                 }
 364         }
 365
 366         _stream_states.clear ();
 367         for (auto i: _pieces) {
 368                 if (i->content->audio) {
 369                         for (auto j: i->content->audio->streams()) {
 370                                 _stream_states[j] = StreamState(i);
 371                         }
 372                 }
 373         }
 374
 375         auto ignore_overlap = [](shared_ptr<VideoContent> v) {
 376                 return v && v->use() && v->frame_type() != VideoFrameType::THREE_D_LEFT && v->frame_type() != VideoFrameType::THREE_D_RIGHT;
 377         };
 378
 379         for (auto piece = _pieces.begin(); piece != _pieces.end(); ++piece) {
 380                 if (ignore_overlap((*piece)->content->video)) {
 381                         /* Look for content later in the content list with in-use video that overlaps this */
 382                         auto const period = (*piece)->content->period(film);
 383                         for (auto later_piece = std::next(piece); later_piece != _pieces.end(); ++later_piece) {
 384                                 if (ignore_overlap((*later_piece)->content->video)) {
 385                                         if (auto overlap = (*later_piece)->content->period(film).overlap(period)) {
 386                                                 (*piece)->ignore_video.push_back(*overlap);
 387                                         }
 388                                 }
 389                         }
 390                 }
 391         }
 392
 393         for (auto piece = _pieces.begin(); piece != _pieces.end(); ++piece) {
 394                 if ((*piece)->content->atmos) {
 395                         /* Look for content later in the content list with ATMOS that overlaps this */
 396                         auto const period = (*piece)->content->period(film);
 397                         for (auto later_piece = std::next(piece); later_piece != _pieces.end(); ++later_piece) {
 398                                 if ((*later_piece)->content->atmos) {
 399                                         if (auto overlap = (*later_piece)->content->period(film).overlap(period)) {
 400                                                 (*piece)->ignore_atmos.push_back(*overlap);
 401                                         }
 402                                 }
 403                         }
 404                 }
 405         }
 406
 407         _black = Empty(film, playlist(), bind(&have_video, _1), _playback_length);
 408         _silent = Empty(film, playlist(), bind(&have_audio, _1), _playback_length);
 409
 410         _next_video_time = boost::none;
 411         _next_audio_time = boost::none;
 412 }
 413
 414
 415 void
 416 Player::playlist_content_change (ChangeType type, int property, bool frequent)
 417 {
 418         auto film = _film.lock();
 419         if (!film) {
 420                 return;
 421         }
 422
 423         if (property == VideoContentProperty::CROP) {
 424                 if (type == ChangeType::DONE) {
 425                         boost::mutex::scoped_lock lm (_mutex);
 426                         for (auto const& i: _delay) {
 427                                 i.first->reset_metadata(film, _video_container_size);
 428                         }
 429                 }
 430         } else {
 431                 if (type == ChangeType::PENDING) {
 432                         /* The player content is probably about to change, so we can't carry on
 433                            until that has happened and we've rebuilt our pieces.  Stop pass()
 434                            and seek() from working until then.
 435                         */
 436                         ++_suspended;
 437                 } else if (type == ChangeType::DONE) {
 438                         /* A change in our content has gone through.  Re-build our pieces. */
 439                         setup_pieces ();
 440                         --_suspended;
 441                 } else if (type == ChangeType::CANCELLED) {
 442                         --_suspended;
 443                 }
 444         }
 445
 446         Change (type, property, frequent);
 447 }
 448
 449
 450 void
 451 Player::set_video_container_size (dcp::Size s)
 452 {
 453         ChangeSignaller<Player, int> cc(this, PlayerProperty::VIDEO_CONTAINER_SIZE);
 454
 455         if (s == _video_container_size) {
 456                 cc.abort();
 457                 return;
 458         }
 459
 460         _video_container_size = s;
 461
 462         {
 463                 boost::mutex::scoped_lock lm(_black_image_mutex);
 464                 _black_image = make_shared<Image>(AV_PIX_FMT_RGB24, _video_container_size, Image::Alignment::PADDED);
 465                 _black_image->make_black ();
 466         }
 467 }
 468
 469
 470 void
 471 Player::playlist_change (ChangeType type)
 472 {
 473         if (type == ChangeType::DONE) {
 474                 setup_pieces ();
 475         }
 476         Change (type, PlayerProperty::PLAYLIST, false);
 477 }
 478
 479
 480 void
 481 Player::film_change(ChangeType type, FilmProperty p)
 482 {
 483         /* Here we should notice Film properties that affect our output, and
 484            alert listeners that our output now would be different to how it was
 485            last time we were run.
 486         */
 487
 488         auto film = _film.lock();
 489         if (!film) {
 490                 return;
 491         }
 492
 493         if (p == FilmProperty::CONTAINER) {
 494                 Change (type, PlayerProperty::FILM_CONTAINER, false);
 495         } else if (p == FilmProperty::VIDEO_FRAME_RATE) {
 496                 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
 497                    so we need new pieces here.
 498                 */
 499                 if (type == ChangeType::DONE) {
 500                         setup_pieces ();
 501                 }
 502                 Change (type, PlayerProperty::FILM_VIDEO_FRAME_RATE, false);
 503         } else if (p == FilmProperty::AUDIO_PROCESSOR) {
 504                 if (type == ChangeType::DONE && film->audio_processor ()) {
 505                         boost::mutex::scoped_lock lm (_mutex);
 506                         _audio_processor = film->audio_processor()->clone(film->audio_frame_rate());
 507                 }
 508         } else if (p == FilmProperty::AUDIO_CHANNELS) {
 509                 if (type == ChangeType::DONE) {
 510                         boost::mutex::scoped_lock lm (_mutex);
 511                         _audio_merger.clear ();
 512                 }
 513         }
 514 }
 515
 516
 517 shared_ptr<PlayerVideo>
 518 Player::black_player_video_frame (Eyes eyes) const
 519 {
 520         boost::mutex::scoped_lock lm(_black_image_mutex);
 521
 522         return std::make_shared<PlayerVideo> (
 523                 make_shared<const RawImageProxy>(_black_image),
 524                 Crop(),
 525                 optional<double>(),
 526                 _video_container_size,
 527                 _video_container_size,
 528                 eyes,
 529                 Part::WHOLE,
 530                 PresetColourConversion::all().front().conversion,
 531                 VideoRange::FULL,
 532                 std::weak_ptr<Content>(),
 533                 boost::optional<dcpomatic::ContentTime>(),
 534                 false
 535         );
 536 }
 537
 538
 539 Frame
 540 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
 541 {
 542         auto film = _film.lock();
 543         DCPOMATIC_ASSERT(film);
 544
 545         auto s = t - piece->content->position ();
 546         s = min (piece->content->length_after_trim(film), s);
 547         s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
 548
 549         /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
 550            then convert that ContentTime to frames at the content's rate.  However this fails for
 551            situations like content at 29.9978733fps, DCP at 30fps.  The accuracy of the Time type is not
 552            enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
 553
 554            Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
 555         */
 556         return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
 557 }
 558
 559
 560 DCPTime
 561 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
 562 {
 563         /* See comment in dcp_to_content_video */
 564         auto const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime(piece->content->trim_start(), piece->frc);
 565         return d + piece->content->position();
 566 }
 567
 568
 569 Frame
 570 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
 571 {
 572         auto film = _film.lock();
 573         DCPOMATIC_ASSERT(film);
 574
 575         auto s = t - piece->content->position ();
 576         s = min (piece->content->length_after_trim(film), s);
 577         /* See notes in dcp_to_content_video */
 578         return max (DCPTime(), DCPTime(piece->content->trim_start(), piece->frc) + s).frames_floor(film->audio_frame_rate());
 579 }
 580
 581
 582 DCPTime
 583 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
 584 {
 585         auto film = _film.lock();
 586         DCPOMATIC_ASSERT(film);
 587
 588         /* See comment in dcp_to_content_video */
 589         return DCPTime::from_frames(f, film->audio_frame_rate())
 590                 - DCPTime (piece->content->trim_start(), piece->frc)
 591                 + piece->content->position();
 592 }
 593
 594
 595 ContentTime
 596 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
 597 {
 598         auto film = _film.lock();
 599         DCPOMATIC_ASSERT(film);
 600
 601         auto s = t - piece->content->position ();
 602         s = min (piece->content->length_after_trim(film), s);
 603         return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
 604 }
 605
 606
 607 DCPTime
 608 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
 609 {
 610         return max (DCPTime(), DCPTime(t - piece->content->trim_start(), piece->frc) + piece->content->position());
 611 }
 612
 613
 614 vector<shared_ptr<Font>>
 615 Player::get_subtitle_fonts ()
 616 {
 617         boost::mutex::scoped_lock lm (_mutex);
 618
 619         vector<shared_ptr<Font>> fonts;
 620         for (auto piece: _pieces) {
 621                 for (auto text: piece->content->text) {
 622                         auto text_fonts = text->fonts();
 623                         copy (text_fonts.begin(), text_fonts.end(), back_inserter(fonts));
 624                 }
 625         }
 626
 627         return fonts;
 628 }
 629
 630
 631 /** Set this player never to produce any video data */
 632 void
 633 Player::set_ignore_video ()
 634 {
 635         ChangeSignaller<Player, int> cc(this, PlayerProperty::IGNORE_VIDEO);
 636         _ignore_video = true;
 637         setup_pieces();
 638 }
 639
 640
 641 void
 642 Player::set_ignore_audio ()
 643 {
 644         ChangeSignaller<Player, int> cc(this, PlayerProperty::IGNORE_AUDIO);
 645         _ignore_audio = true;
 646         setup_pieces();
 647 }
 648
 649
 650 void
 651 Player::set_ignore_text ()
 652 {
 653         ChangeSignaller<Player, int> cc(this, PlayerProperty::IGNORE_TEXT);
 654         _ignore_text = true;
 655         setup_pieces();
 656 }
 657
 658
 659 /** Set the player to always burn open texts into the image regardless of the content settings */
 660 void
 661 Player::set_always_burn_open_subtitles ()
 662 {
 663         ChangeSignaller<Player, int> cc(this, PlayerProperty::ALWAYS_BURN_OPEN_SUBTITLES);
 664         _always_burn_open_subtitles = true;
 665 }
 666
 667
 668 /** Sets up the player to be faster, possibly at the expense of quality */
 669 void
 670 Player::set_fast ()
 671 {
 672         _fast = true;
 673         setup_pieces();
 674 }
 675
 676
 677 void
 678 Player::set_play_referenced ()
 679 {
 680         ChangeSignaller<Player, int> cc(this, PlayerProperty::PLAY_REFERENCED);
 681         _play_referenced = true;
 682         setup_pieces();
 683 }
 684
 685
 686 bool
 687 Player::pass ()
 688 {
 689         boost::mutex::scoped_lock lm (_mutex);
 690
 691         if (_suspended) {
 692                 /* We can't pass in this state */
 693                 LOG_DEBUG_PLAYER_NC ("Player is suspended");
 694                 return false;
 695         }
 696
 697         auto film = _film.lock();
 698
 699         if (_playback_length.load() == DCPTime() || !film) {
 700                 /* Special; just give one black frame */
 701                 use_video(black_player_video_frame(Eyes::BOTH), DCPTime(), one_video_frame());
 702                 return true;
 703         }
 704
 705         /* Find the decoder or empty which is farthest behind where we are and make it emit some data */
 706
 707         shared_ptr<Piece> earliest_content;
 708         optional<DCPTime> earliest_time;
 709
 710         for (auto i: _pieces) {
 711                 if (i->done) {
 712                         continue;
 713                 }
 714
 715                 auto const t = content_time_to_dcp (i, max(i->decoder->position(), i->content->trim_start()));
 716                 if (t > i->content->end(film)) {
 717                         i->done = true;
 718                 } else {
 719
 720                         /* Given two choices at the same time, pick the one with texts so we see it before
 721                            the video.
 722                         */
 723                         if (!earliest_time || t < *earliest_time || (t == *earliest_time && !i->decoder->text.empty())) {
 724                                 earliest_time = t;
 725                                 earliest_content = i;
 726                         }
 727                 }
 728         }
 729
 730         bool done = false;
 731
 732         enum {
 733                 NONE,
 734                 CONTENT,
 735                 BLACK,
 736                 SILENT
 737         } which = NONE;
 738
 739         if (earliest_content) {
 740                 which = CONTENT;
 741         }
 742
 743         if (!_black.done() && !_ignore_video && (!earliest_time || _black.position() < *earliest_time)) {
 744                 earliest_time = _black.position ();
 745                 which = BLACK;
 746         }
 747
 748         if (!_silent.done() && !_ignore_audio && (!earliest_time || _silent.position() < *earliest_time)) {
 749                 earliest_time = _silent.position ();
 750                 which = SILENT;
 751         }
 752
 753         switch (which) {
 754         case CONTENT:
 755         {
 756                 LOG_DEBUG_PLAYER ("Calling pass() on %1", earliest_content->content->path(0));
 757                 earliest_content->done = earliest_content->decoder->pass ();
 758                 auto dcp = dynamic_pointer_cast<DCPContent>(earliest_content->content);
 759                 if (dcp && !_play_referenced) {
 760                         if (dcp->reference_video()) {
 761                                 _next_video_time = dcp->end(film);
 762                         }
 763                         if (dcp->reference_audio()) {
 764                                 /* We are skipping some referenced DCP audio content, so we need to update _next_audio_time
 765                                    to `hide' the fact that no audio was emitted during the referenced DCP (though
 766                                    we need to behave as though it was).
 767                                 */
 768                                 _next_audio_time = dcp->end(film);
 769                         }
 770                 }
 771                 break;
 772         }
 773         case BLACK:
 774                 LOG_DEBUG_PLAYER ("Emit black for gap at %1", to_string(_black.position()));
 775                 if (film->three_d()) {
 776                         use_video(black_player_video_frame(Eyes::LEFT), _black.position(), _black.period_at_position().to);
 777                         use_video(black_player_video_frame(Eyes::RIGHT), _black.position(), _black.period_at_position().to);
 778                 } else {
 779                         use_video(black_player_video_frame(Eyes::BOTH), _black.position(), _black.period_at_position().to);
 780                 }
 781                 _black.set_position (_black.position() + one_video_frame());
 782                 break;
 783         case SILENT:
 784         {
 785                 LOG_DEBUG_PLAYER ("Emit silence for gap at %1", to_string(_silent.position()));
 786                 DCPTimePeriod period (_silent.period_at_position());
 787                 if (_next_audio_time) {
 788                         /* Sometimes the thing that happened last finishes fractionally before
 789                            or after this silence.  Bodge the start time of the silence to fix it.
 790                            I think this is nothing to worry about since we will just add or
 791                            remove a little silence at the end of some content.
 792                         */
 793                         int64_t const error = labs(period.from.get() - _next_audio_time->get());
 794                         /* Let's not worry about less than a frame at 24fps */
 795                         int64_t const too_much_error = DCPTime::from_frames(1, 24).get();
 796                         if (error >= too_much_error) {
 797                                 film->log()->log(String::compose("Silence starting before or after last audio by %1", error), LogEntry::TYPE_ERROR);
 798                         }
 799                         DCPOMATIC_ASSERT (error < too_much_error);
 800                         period.from = *_next_audio_time;
 801                 }
 802                 if (period.duration() > one_video_frame()) {
 803                         period.to = period.from + one_video_frame();
 804                 }
 805                 fill_audio (period);
 806                 _silent.set_position (period.to);
 807                 break;
 808         }
 809         case NONE:
 810                 done = true;
 811                 break;
 812         }
 813
 814         /* Emit any audio that is ready */
 815
 816         /* Work out the time before which the audio is definitely all here.  This is the earliest last_push_end of one
 817            of our streams, or the position of the _silent.  First, though we choose only streams that are less than
 818            ignore_streams_behind seconds behind the furthest ahead (we assume that if a stream has fallen that far
 819            behind it has finished).  This is so that we don't withhold audio indefinitely awaiting data from a stream
 820            that will never come, causing bugs like #2101.
 821         */
 822         constexpr int ignore_streams_behind = 5;
 823
 824         using state_pair = std::pair<AudioStreamPtr, StreamState>;
 825
 826         /* Find streams that have pushed */
 827         std::vector<state_pair> have_pushed;
 828         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); });
 829
 830         /* Find the 'leading' stream (i.e. the one that pushed data most recently) */
 831         auto latest_last_push_end = std::max_element(
 832                 have_pushed.begin(),
 833                 have_pushed.end(),
 834                 [](state_pair const& a, state_pair const& b) { return a.second.last_push_end.get() < b.second.last_push_end.get(); }
 835                 );
 836
 837         std::map<AudioStreamPtr, StreamState> alive_stream_states;
 838
 839         if (latest_last_push_end != have_pushed.end()) {
 840                 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()));
 841
 842                 /* Now make a list of those streams that are less than ignore_streams_behind behind the leader */
 843                 for (auto const& i: _stream_states) {
 844                         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)) {
 845                                 alive_stream_states.insert(i);
 846                         } else {
 847                                 LOG_DEBUG_PLAYER("Ignoring stream %1 because it is too far behind", i.second.piece->content->path(0));
 848                         }
 849                 }
 850         }
 851
 852         auto pull_to = _playback_length.load();
 853         for (auto const& i: alive_stream_states) {
 854                 auto position = i.second.last_push_end.get_value_or(i.second.piece->content->position());
 855                 if (!i.second.piece->done && position < pull_to) {
 856                         pull_to = position;
 857                 }
 858         }
 859         if (!_silent.done() && _silent.position() < pull_to) {
 860                 pull_to = _silent.position();
 861         }
 862
 863         LOG_DEBUG_PLAYER("Emitting audio up to %1", to_string(pull_to));
 864         auto audio = _audio_merger.pull (pull_to);
 865         for (auto i = audio.begin(); i != audio.end(); ++i) {
 866                 if (_next_audio_time && i->second < *_next_audio_time) {
 867                         /* This new data comes before the last we emitted (or the last seek); discard it */
 868                         auto cut = discard_audio (i->first, i->second, *_next_audio_time);
 869                         if (!cut.first) {
 870                                 continue;
 871                         }
 872                         *i = cut;
 873                 } else if (_next_audio_time && i->second > *_next_audio_time) {
 874                         /* There's a gap between this data and the last we emitted; fill with silence */
 875                         fill_audio (DCPTimePeriod (*_next_audio_time, i->second));
 876                 }
 877
 878                 emit_audio (i->first, i->second);
 879         }
 880
 881         if (done) {
 882                 emit_video_until(film->length());
 883
 884                 if (_shuffler) {
 885                         _shuffler->flush ();
 886                 }
 887                 for (auto const& i: _delay) {
 888                         emit_video(i.first, i.second);
 889                 }
 890         }
 891
 892         return done;
 893 }
 894
 895
 896 /** @return Open subtitles for the frame at the given time, converted to images */
 897 optional<PositionImage>
 898 Player::open_subtitles_for_frame (DCPTime time) const
 899 {
 900         auto film = _film.lock();
 901         if (!film) {
 902                 return {};
 903         }
 904
 905         list<PositionImage> captions;
 906         int const vfr = film->video_frame_rate();
 907
 908         for (
 909                 auto j:
 910                 _active_texts[TextType::OPEN_SUBTITLE].get_burnt(DCPTimePeriod(time, time + DCPTime::from_frames(1, vfr)), _always_burn_open_subtitles)
 911                 ) {
 912
 913                 /* Bitmap subtitles */
 914                 for (auto i: j.bitmap) {
 915                         if (!i.image) {
 916                                 continue;
 917                         }
 918
 919                         /* i.image will already have been scaled to fit _video_container_size */
 920                         dcp::Size scaled_size (i.rectangle.width * _video_container_size.load().width, i.rectangle.height * _video_container_size.load().height);
 921
 922                         captions.push_back (
 923                                 PositionImage (
 924                                         i.image,
 925                                         Position<int> (
 926                                                 lrint(_video_container_size.load().width * i.rectangle.x),
 927                                                 lrint(_video_container_size.load().height * i.rectangle.y)
 928                                                 )
 929                                         )
 930                                 );
 931                 }
 932
 933                 /* String subtitles (rendered to an image) */
 934                 if (!j.string.empty()) {
 935                         auto s = render_text(j.string, _video_container_size, time, vfr);
 936                         copy (s.begin(), s.end(), back_inserter (captions));
 937                 }
 938         }
 939
 940         if (captions.empty()) {
 941                 return {};
 942         }
 943
 944         return merge (captions, _subtitle_alignment);
 945 }
 946
 947
 948 void
 949 Player::emit_video_until(DCPTime time)
 950 {
 951         auto frame = [this](shared_ptr<PlayerVideo> pv, DCPTime time) {
 952                 /* We need a delay to give a little wiggle room to ensure that relevant subtitles arrive at the
 953                    player before the video that requires them.
 954                 */
 955                 _delay.push_back(make_pair(pv, time));
 956
 957                 if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
 958                         _next_video_time = time + one_video_frame();
 959                 }
 960
 961                 if (_delay.size() < 3) {
 962                         return;
 963                 }
 964
 965                 auto to_do = _delay.front();
 966                 _delay.pop_front();
 967                 emit_video(to_do.first, to_do.second);
 968         };
 969
 970         auto const age_threshold = one_video_frame() * 2;
 971
 972         while (_next_video_time.get_value_or({}) < time) {
 973                 auto left = _last_video[Eyes::LEFT];
 974                 auto right = _last_video[Eyes::RIGHT];
 975                 auto both = _last_video[Eyes::BOTH];
 976
 977                 auto const next = _next_video_time.get_value_or({});
 978
 979                 if (
 980                         left.first &&
 981                         right.first &&
 982                         (!both.first || (left.second >= both.second && right.second >= both.second)) &&
 983                         (left.second - next) < age_threshold &&
 984                         (right.second - next) < age_threshold
 985                    ) {
 986                         frame(left.first, next);
 987                         frame(right.first, next);
 988                 } else if (both.first && (both.second - next) < age_threshold) {
 989                         frame(both.first, next);
 990                         LOG_DEBUG_PLAYER("Content %1 selected for DCP %2 (age %3)", to_string(both.second), to_string(next), to_string(both.second - next));
 991                 } else {
 992                         auto film = _film.lock();
 993                         if (film && film->three_d()) {
 994                                 frame(black_player_video_frame(Eyes::LEFT), next);
 995                                 frame(black_player_video_frame(Eyes::RIGHT), next);
 996                         } else {
 997                                 frame(black_player_video_frame(Eyes::BOTH), next);
 998                         }
 999                         LOG_DEBUG_PLAYER("Black selected for DCP %1", to_string(next));
1000                 }
1001         }
1002 }
1003
1004
1005 void
1006 Player::video (weak_ptr<Piece> weak_piece, ContentVideo video)
1007 {
1008         if (_suspended) {
1009                 return;
1010         }
1011
1012         auto piece = weak_piece.lock ();
1013         if (!piece) {
1014                 return;
1015         }
1016
1017         if (!piece->content->video->use()) {
1018                 return;
1019         }
1020
1021         auto film = _film.lock();
1022         if (!film) {
1023                 return;
1024         }
1025
1026         vector<Eyes> eyes_to_emit;
1027
1028         if (!film->three_d()) {
1029                 if (video.eyes == Eyes::RIGHT) {
1030                         /* 2D film, 3D content: discard right */
1031                         return;
1032                 } else if (video.eyes == Eyes::LEFT) {
1033                         /* 2D film, 3D content: emit left as "both" */
1034                         video.eyes = Eyes::BOTH;
1035                         eyes_to_emit = { Eyes::BOTH };
1036                 }
1037         } else {
1038                 if (video.eyes == Eyes::BOTH) {
1039                         /* 3D film, 2D content; emit "both" for left and right */
1040                         eyes_to_emit = { Eyes::LEFT, Eyes::RIGHT };
1041                 }
1042         }
1043
1044         if (eyes_to_emit.empty()) {
1045                 eyes_to_emit = { video.eyes };
1046         }
1047
1048         /* Time of the frame we just received within the DCP */
1049         auto const time = content_time_to_dcp(piece, video.time);
1050         LOG_DEBUG_PLAYER("Received video frame %1 %2 eyes %3", to_string(video.time), to_string(time), static_cast<int>(video.eyes));
1051
1052         if (time < piece->content->position()) {
1053                 return;
1054         }
1055
1056         auto ignore_video = std::find_if(
1057                 piece->ignore_video.begin(),
1058                 piece->ignore_video.end(),
1059                 [time](DCPTimePeriod period) { return period.contains(time); }
1060                 );
1061         if (ignore_video != piece->ignore_video.end()) {
1062                 return;
1063         }
1064
1065         if (!_next_video_time) {
1066                 _next_video_time = time.round(film->video_frame_rate());
1067         }
1068
1069         auto const content_video = piece->content->video;
1070
1071         for (auto eyes: eyes_to_emit) {
1072                 use_video(
1073                         std::make_shared<PlayerVideo>(
1074                                 video.image,
1075                                 content_video->actual_crop(),
1076                                 content_video->fade(film, video.time),
1077                                 scale_for_display(
1078                                         content_video->scaled_size(film->frame_size()),
1079                                         _video_container_size,
1080                                         film->frame_size(),
1081                                         content_video->pixel_quanta()
1082                                         ),
1083                                 _video_container_size,
1084                                 eyes,
1085                                 video.part,
1086                                 content_video->colour_conversion(),
1087                                 content_video->range(),
1088                                 piece->content,
1089                                 video.time,
1090                                 false
1091                                 ),
1092                         time,
1093                         piece->content->end(film)
1094                         );
1095         }
1096 }
1097
1098 void
1099 Player::use_video(shared_ptr<PlayerVideo> pv, DCPTime time, DCPTime end)
1100 {
1101         _last_video[pv->eyes()] = { pv, time };
1102         if (pv->eyes() != Eyes::LEFT) {
1103                 emit_video_until(std::min(time + one_video_frame() / 2, end));
1104         }
1105 }
1106
1107
1108 void
1109 Player::audio (weak_ptr<Piece> weak_piece, AudioStreamPtr stream, ContentAudio content_audio)
1110 {
1111         if (_suspended) {
1112                 return;
1113         }
1114
1115         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1116
1117         auto piece = weak_piece.lock ();
1118         if (!piece) {
1119                 return;
1120         }
1121
1122         auto film = _film.lock();
1123         if (!film) {
1124                 return;
1125         }
1126
1127         auto content = piece->content->audio;
1128         DCPOMATIC_ASSERT (content);
1129
1130         int const rfr = content->resampled_frame_rate(film);
1131
1132         /* Compute time in the DCP */
1133         auto time = resampled_audio_to_dcp (piece, content_audio.frame);
1134
1135         /* And the end of this block in the DCP */
1136         auto end = time + DCPTime::from_frames(content_audio.audio->frames(), rfr);
1137         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());
1138
1139         /* Remove anything that comes before the start or after the end of the content */
1140         if (time < piece->content->position()) {
1141                 auto cut = discard_audio (content_audio.audio, time, piece->content->position());
1142                 if (!cut.first) {
1143                         /* This audio is entirely discarded */
1144                         return;
1145                 }
1146                 content_audio.audio = cut.first;
1147                 time = cut.second;
1148         } else if (time > piece->content->end(film)) {
1149                 /* Discard it all */
1150                 return;
1151         } else if (end > piece->content->end(film)) {
1152                 Frame const remaining_frames = DCPTime(piece->content->end(film) - time).frames_round(rfr);
1153                 if (remaining_frames == 0) {
1154                         return;
1155                 }
1156                 content_audio.audio = make_shared<AudioBuffers>(content_audio.audio, remaining_frames, 0);
1157         }
1158
1159         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
1160
1161         /* Gain and fade */
1162
1163         auto const fade_coeffs = content->fade (stream, content_audio.frame, content_audio.audio->frames(), rfr);
1164         if (content->gain() != 0 || !fade_coeffs.empty()) {
1165                 auto gain_buffers = make_shared<AudioBuffers>(content_audio.audio);
1166                 if (!fade_coeffs.empty()) {
1167                         /* Apply both fade and gain */
1168                         DCPOMATIC_ASSERT (fade_coeffs.size() == static_cast<size_t>(gain_buffers->frames()));
1169                         auto const channels = gain_buffers->channels();
1170                         auto const frames = fade_coeffs.size();
1171                         auto data = gain_buffers->data();
1172                         auto const gain = db_to_linear (content->gain());
1173                         for (auto channel = 0; channel < channels; ++channel) {
1174                                 for (auto frame = 0U; frame < frames; ++frame) {
1175                                         data[channel][frame] *= gain * fade_coeffs[frame];
1176                                 }
1177                         }
1178                 } else {
1179                         /* Just apply gain */
1180                         gain_buffers->apply_gain (content->gain());
1181                 }
1182                 content_audio.audio = gain_buffers;
1183         }
1184
1185         /* Remap */
1186
1187         content_audio.audio = remap(content_audio.audio, film->audio_channels(), stream->mapping());
1188
1189         /* Process */
1190
1191         if (_audio_processor) {
1192                 content_audio.audio = _audio_processor->run(content_audio.audio, film->audio_channels());
1193         }
1194
1195         /* Push */
1196
1197         _audio_merger.push (content_audio.audio, time);
1198         DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
1199         _stream_states[stream].last_push_end = time + DCPTime::from_frames(content_audio.audio->frames(), film->audio_frame_rate());
1200 }
1201
1202
1203 void
1204 Player::bitmap_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentBitmapText subtitle)
1205 {
1206         if (_suspended) {
1207                 return;
1208         }
1209
1210         auto piece = weak_piece.lock ();
1211         auto content = weak_content.lock ();
1212         if (!piece || !content) {
1213                 return;
1214         }
1215
1216         PlayerText ps;
1217         for (auto& sub: subtitle.subs)
1218         {
1219                 /* Apply content's subtitle offsets */
1220                 sub.rectangle.x += content->x_offset ();
1221                 sub.rectangle.y += content->y_offset ();
1222
1223                 /* Apply a corrective translation to keep the subtitle centred after the scale that is coming up */
1224                 sub.rectangle.x -= sub.rectangle.width * ((content->x_scale() - 1) / 2);
1225                 sub.rectangle.y -= sub.rectangle.height * ((content->y_scale() - 1) / 2);
1226
1227                 /* Apply content's subtitle scale */
1228                 sub.rectangle.width *= content->x_scale ();
1229                 sub.rectangle.height *= content->y_scale ();
1230
1231                 auto image = sub.image;
1232
1233                 /* We will scale the subtitle up to fit _video_container_size */
1234                 int const width = sub.rectangle.width * _video_container_size.load().width;
1235                 int const height = sub.rectangle.height * _video_container_size.load().height;
1236                 if (width == 0 || height == 0) {
1237                         return;
1238                 }
1239
1240                 dcp::Size scaled_size (width, height);
1241                 ps.bitmap.push_back (BitmapText(image->scale(scaled_size, dcp::YUVToRGB::REC601, image->pixel_format(), Image::Alignment::PADDED, _fast), sub.rectangle));
1242         }
1243
1244         DCPTime from(content_time_to_dcp(piece, subtitle.from()));
1245         _active_texts[content->type()].add_from(weak_content, ps, from);
1246 }
1247
1248
1249 void
1250 Player::plain_text_start (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentStringText subtitle)
1251 {
1252         if (_suspended) {
1253                 return;
1254         }
1255
1256         auto piece = weak_piece.lock ();
1257         auto content = weak_content.lock ();
1258         auto film = _film.lock();
1259         if (!piece || !content || !film) {
1260                 return;
1261         }
1262
1263         PlayerText ps;
1264         DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
1265
1266         if (from > piece->content->end(film)) {
1267                 return;
1268         }
1269
1270         for (auto s: subtitle.subs) {
1271                 s.set_h_position (s.h_position() + content->x_offset());
1272                 s.set_v_position (s.v_position() + content->y_offset());
1273                 float const xs = content->x_scale();
1274                 float const ys = content->y_scale();
1275                 float size = s.size();
1276
1277                 /* Adjust size to express the common part of the scaling;
1278                    e.g. if xs = ys = 0.5 we scale size by 2.
1279                 */
1280                 if (xs > 1e-5 && ys > 1e-5) {
1281                         size *= 1 / min (1 / xs, 1 / ys);
1282                 }
1283                 s.set_size (size);
1284
1285                 /* Then express aspect ratio changes */
1286                 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
1287                         s.set_aspect_adjust (xs / ys);
1288                 }
1289
1290                 s.set_in (dcp::Time(from.seconds(), 1000));
1291                 ps.string.push_back (s);
1292         }
1293
1294         _active_texts[content->type()].add_from(weak_content, ps, from);
1295 }
1296
1297
1298 void
1299 Player::subtitle_stop (weak_ptr<Piece> weak_piece, weak_ptr<const TextContent> weak_content, ContentTime to)
1300 {
1301         if (_suspended) {
1302                 return;
1303         }
1304
1305         auto content = weak_content.lock ();
1306         if (!content) {
1307                 return;
1308         }
1309
1310         if (!_active_texts[content->type()].have(weak_content)) {
1311                 return;
1312         }
1313
1314         auto piece = weak_piece.lock ();
1315         auto film = _film.lock();
1316         if (!piece || !film) {
1317                 return;
1318         }
1319
1320         DCPTime const dcp_to = content_time_to_dcp (piece, to);
1321
1322         if (dcp_to > piece->content->end(film)) {
1323                 return;
1324         }
1325
1326         auto from = _active_texts[content->type()].add_to(weak_content, dcp_to);
1327
1328         bool const always = (content->type() == TextType::OPEN_SUBTITLE && _always_burn_open_subtitles);
1329         if (content->use() && !always && !content->burn()) {
1330                 Text (from.first, content->type(), content->dcp_track().get_value_or(DCPTextTrack()), DCPTimePeriod(from.second, dcp_to));
1331         }
1332 }
1333
1334
1335 void
1336 Player::seek (DCPTime time, bool accurate)
1337 {
1338         boost::mutex::scoped_lock lm (_mutex);
1339         LOG_DEBUG_PLAYER("Seek to %1 (%2accurate)", to_string(time), accurate ? "" : "in");
1340
1341         if (_suspended) {
1342                 /* We can't seek in this state */
1343                 return;
1344         }
1345
1346         auto film = _film.lock();
1347         if (!film) {
1348                 return;
1349         }
1350
1351         if (_shuffler) {
1352                 _shuffler->clear ();
1353         }
1354
1355         _delay.clear ();
1356
1357         if (_audio_processor) {
1358                 _audio_processor->flush ();
1359         }
1360
1361         _audio_merger.clear ();
1362         std::for_each(_active_texts.begin(), _active_texts.end(), [](ActiveText& a) { a.clear(); });
1363
1364         for (auto i: _pieces) {
1365                 if (time < i->content->position()) {
1366                         /* Before; seek to the start of the content.  Even if this request is for an inaccurate seek
1367                            we must seek this (following) content accurately, otherwise when we come to the end of the current
1368                            content we may not start right at the beginning of the next, causing a gap (if the next content has
1369                            been trimmed to a point between keyframes, or something).
1370                         */
1371                         i->decoder->seek (dcp_to_content_time (i, i->content->position()), true);
1372                         i->done = false;
1373                 } else if (i->content->position() <= time && time < i->content->end(film)) {
1374                         /* During; seek to position */
1375                         i->decoder->seek (dcp_to_content_time (i, time), accurate);
1376                         i->done = false;
1377                 } else {
1378                         /* After; this piece is done */
1379                         i->done = true;
1380                 }
1381         }
1382
1383         if (accurate) {
1384                 _next_video_time = time;
1385                 _next_audio_time = time;
1386         } else {
1387                 _next_video_time = boost::none;
1388                 _next_audio_time = boost::none;
1389         }
1390
1391         _black.set_position (time);
1392         _silent.set_position (time);
1393
1394         _last_video[Eyes::LEFT] = {};
1395         _last_video[Eyes::RIGHT] = {};
1396         _last_video[Eyes::BOTH] = {};
1397
1398         for (auto& state: _stream_states) {
1399                 state.second.last_push_end = boost::none;
1400         }
1401 }
1402
1403
1404 void
1405 Player::emit_video(shared_ptr<PlayerVideo> pv, DCPTime time)
1406 {
1407         if (pv->eyes() == Eyes::BOTH || pv->eyes() == Eyes::RIGHT) {
1408                 std::for_each(_active_texts.begin(), _active_texts.end(), [time](ActiveText& a) { a.clear_before(time); });
1409         }
1410
1411         auto subtitles = open_subtitles_for_frame (time);
1412         if (subtitles) {
1413                 pv->set_text (subtitles.get ());
1414         }
1415
1416         Video (pv, time);
1417 }
1418
1419
1420 void
1421 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1422 {
1423         auto film = _film.lock();
1424         DCPOMATIC_ASSERT(film);
1425
1426         /* Log if the assert below is about to fail */
1427         if (_next_audio_time && labs(time.get() - _next_audio_time->get()) > 1) {
1428                 film->log()->log(String::compose("Out-of-sequence emit %1 vs %2", to_string(time), to_string(*_next_audio_time)), LogEntry::TYPE_WARNING);
1429         }
1430
1431         /* This audio must follow on from the previous, allowing for half a sample (at 48kHz) leeway */
1432         DCPOMATIC_ASSERT (!_next_audio_time || labs(time.get() - _next_audio_time->get()) < 2);
1433         Audio(data, time, film->audio_frame_rate());
1434         _next_audio_time = time + DCPTime::from_frames(data->frames(), film->audio_frame_rate());
1435 }
1436
1437
1438 void
1439 Player::fill_audio (DCPTimePeriod period)
1440 {
1441         auto film = _film.lock();
1442         DCPOMATIC_ASSERT(film);
1443
1444         if (period.from == period.to) {
1445                 return;
1446         }
1447
1448         DCPOMATIC_ASSERT (period.from < period.to);
1449
1450         DCPTime t = period.from;
1451         while (t < period.to) {
1452                 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
1453                 Frame const samples = block.frames_round(film->audio_frame_rate());
1454                 if (samples) {
1455                         auto silence = make_shared<AudioBuffers>(film->audio_channels(), samples);
1456                         silence->make_silent ();
1457                         emit_audio (silence, t);
1458                 }
1459                 t += block;
1460         }
1461 }
1462
1463
1464 DCPTime
1465 Player::one_video_frame () const
1466 {
1467         auto film = _film.lock();
1468         DCPOMATIC_ASSERT(film);
1469
1470         return DCPTime::from_frames(1, film->video_frame_rate ());
1471 }
1472
1473
1474 pair<shared_ptr<AudioBuffers>, DCPTime>
1475 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1476 {
1477         auto film = _film.lock();
1478         DCPOMATIC_ASSERT(film);
1479
1480         auto const discard_time = discard_to - time;
1481         auto const discard_frames = discard_time.frames_round(film->audio_frame_rate());
1482         auto remaining_frames = audio->frames() - discard_frames;
1483         if (remaining_frames <= 0) {
1484                 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1485         }
1486         auto cut = make_shared<AudioBuffers>(audio, remaining_frames, discard_frames);
1487         return make_pair(cut, time + discard_time);
1488 }
1489
1490
1491 void
1492 Player::set_dcp_decode_reduction (optional<int> reduction)
1493 {
1494         ChangeSignaller<Player, int> cc(this, PlayerProperty::DCP_DECODE_REDUCTION);
1495
1496         if (reduction == _dcp_decode_reduction.load()) {
1497                 cc.abort();
1498                 return;
1499         }
1500
1501         _dcp_decode_reduction = reduction;
1502         setup_pieces();
1503 }
1504
1505
1506 optional<DCPTime>
1507 Player::content_time_to_dcp (shared_ptr<const Content> content, ContentTime t) const
1508 {
1509         boost::mutex::scoped_lock lm (_mutex);
1510
1511         for (auto i: _pieces) {
1512                 if (i->content == content) {
1513                         return content_time_to_dcp (i, t);
1514                 }
1515         }
1516
1517         /* We couldn't find this content; perhaps things are being changed over */
1518         return {};
1519 }
1520
1521
1522 optional<ContentTime>
1523 Player::dcp_to_content_time (shared_ptr<const Content> content, DCPTime t) const
1524 {
1525         boost::mutex::scoped_lock lm (_mutex);
1526
1527         for (auto i: _pieces) {
1528                 if (i->content == content) {
1529                         return dcp_to_content_time (i, t);
1530                 }
1531         }
1532
1533         /* We couldn't find this content; perhaps things are being changed over */
1534         return {};
1535 }
1536
1537
1538 shared_ptr<const Playlist>
1539 Player::playlist () const
1540 {
1541         auto film = _film.lock();
1542         if (!film) {
1543                 return {};
1544         }
1545
1546         return _playlist ? _playlist : film->playlist();
1547 }
1548
1549
1550 void
1551 Player::atmos (weak_ptr<Piece> weak_piece, ContentAtmos data)
1552 {
1553         if (_suspended) {
1554                 return;
1555         }
1556
1557         auto film = _film.lock();
1558         DCPOMATIC_ASSERT(film);
1559
1560         auto piece = weak_piece.lock ();
1561         DCPOMATIC_ASSERT (piece);
1562
1563         auto const vfr = film->video_frame_rate();
1564
1565         DCPTime const dcp_time = DCPTime::from_frames(data.frame, vfr) - DCPTime(piece->content->trim_start(), FrameRateChange(vfr, vfr));
1566         if (dcp_time < piece->content->position() || dcp_time >= (piece->content->end(film))) {
1567                 return;
1568         }
1569
1570         auto ignore_atmos = std::find_if(
1571                 piece->ignore_atmos.begin(),
1572                 piece->ignore_atmos.end(),
1573                 [dcp_time](DCPTimePeriod period) { return period.contains(dcp_time); }
1574                 );
1575         if (ignore_atmos != piece->ignore_atmos.end()) {
1576                 return;
1577         }
1578
1579         Atmos (data.data, dcp_time, data.metadata);
1580 }
1581
1582
1583 void
1584 Player::signal_change(ChangeType type, int property)
1585 {
1586         Change(type, property, false);
1587 }
1588