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