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