src/lib/player.cc

   1 /*
   2     Copyright (C) 2013-2020 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 #include "atmos_decoder.h"
  22 #include "player.h"
  23 #include "film.h"
  24 #include "audio_buffers.h"
  25 #include "content_audio.h"
  26 #include "dcp_content.h"
  27 #include "dcpomatic_log.h"
  28 #include "job.h"
  29 #include "image.h"
  30 #include "raw_image_proxy.h"
  31 #include "ratio.h"
  32 #include "log.h"
  33 #include "render_text.h"
  34 #include "config.h"
  35 #include "content_video.h"
  36 #include "player_video.h"
  37 #include "frame_rate_change.h"
  38 #include "audio_processor.h"
  39 #include "playlist.h"
  40 #include "referenced_reel_asset.h"
  41 #include "decoder_factory.h"
  42 #include "decoder.h"
  43 #include "video_decoder.h"
  44 #include "audio_decoder.h"
  45 #include "text_content.h"
  46 #include "text_decoder.h"
  47 #include "ffmpeg_content.h"
  48 #include "audio_content.h"
  49 #include "dcp_decoder.h"
  50 #include "image_decoder.h"
  51 #include "compose.hpp"
  52 #include "shuffler.h"
  53 #include "timer.h"
  54 #include <dcp/reel.h>
  55 #include <dcp/reel_sound_asset.h>
  56 #include <dcp/reel_subtitle_asset.h>
  57 #include <dcp/reel_picture_asset.h>
  58 #include <dcp/reel_closed_caption_asset.h>
  59 #include <boost/foreach.hpp>
  60 #include <stdint.h>
  61 #include <algorithm>
  62 #include <iostream>
  63
  64 #include "i18n.h"
  65
  66 using std::list;
  67 using std::cout;
  68 using std::min;
  69 using std::max;
  70 using std::min;
  71 using std::vector;
  72 using std::pair;
  73 using std::map;
  74 using std::make_pair;
  75 using std::copy;
  76 using boost::shared_ptr;
  77 using boost::weak_ptr;
  78 using boost::dynamic_pointer_cast;
  79 using boost::optional;
  80 using boost::scoped_ptr;
  81 using namespace dcpomatic;
  82
  83 int const PlayerProperty::VIDEO_CONTAINER_SIZE = 700;
  84 int const PlayerProperty::PLAYLIST = 701;
  85 int const PlayerProperty::FILM_CONTAINER = 702;
  86 int const PlayerProperty::FILM_VIDEO_FRAME_RATE = 703;
  87 int const PlayerProperty::DCP_DECODE_REDUCTION = 704;
  88 int const PlayerProperty::PLAYBACK_LENGTH = 705;
  89
  90 Player::Player (shared_ptr<const Film> film)
  91         : _film (film)
  92         , _suspended (0)
  93         , _ignore_video (false)
  94         , _ignore_audio (false)
  95         , _ignore_text (false)
  96         , _always_burn_open_subtitles (false)
  97         , _fast (false)
  98         , _tolerant (film->tolerant())
  99         , _play_referenced (false)
 100         , _audio_merger (_film->audio_frame_rate())
 101         , _shuffler (0)
 102 {
 103         construct ();
 104 }
 105
 106 Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist_)
 107         : _film (film)
 108         , _playlist (playlist_)
 109         , _suspended (0)
 110         , _ignore_video (false)
 111         , _ignore_audio (false)
 112         , _ignore_text (false)
 113         , _always_burn_open_subtitles (false)
 114         , _fast (false)
 115         , _tolerant (film->tolerant())
 116         , _play_referenced (false)
 117         , _audio_merger (_film->audio_frame_rate())
 118         , _shuffler (0)
 119 {
 120         construct ();
 121 }
 122
 123 void
 124 Player::construct ()
 125 {
 126         _film_changed_connection = _film->Change.connect (bind (&Player::film_change, this, _1, _2));
 127         /* The butler must hear about this first, so since we are proxying this through to the butler we must
 128            be first.
 129         */
 130         _playlist_change_connection = playlist()->Change.connect (bind (&Player::playlist_change, this, _1), boost::signals2::at_front);
 131         _playlist_content_change_connection = playlist()->ContentChange.connect (bind(&Player::playlist_content_change, this, _1, _3, _4));
 132         set_video_container_size (_film->frame_size ());
 133
 134         film_change (CHANGE_TYPE_DONE, Film::AUDIO_PROCESSOR);
 135
 136         setup_pieces ();
 137         seek (DCPTime (), true);
 138 }
 139
 140 Player::~Player ()
 141 {
 142         delete _shuffler;
 143 }
 144
 145 void
 146 Player::setup_pieces ()
 147 {
 148         boost::mutex::scoped_lock lm (_mutex);
 149         setup_pieces_unlocked ();
 150 }
 151
 152
 153 bool
 154 have_video (shared_ptr<const Content> content)
 155 {
 156         return static_cast<bool>(content->video) && content->video->use();
 157 }
 158
 159 bool
 160 have_audio (shared_ptr<const Content> content)
 161 {
 162         return static_cast<bool>(content->audio);
 163 }
 164
 165 void
 166 Player::setup_pieces_unlocked ()
 167 {
 168         _playback_length = _playlist ? _playlist->length(_film) : _film->length();
 169
 170         list<shared_ptr<Piece> > old_pieces = _pieces;
 171         _pieces.clear ();
 172
 173         delete _shuffler;
 174         _shuffler = new Shuffler();
 175         _shuffler->Video.connect(bind(&Player::video, this, _1, _2));
 176
 177         BOOST_FOREACH (shared_ptr<Content> i, playlist()->content()) {
 178
 179                 if (!i->paths_valid ()) {
 180                         continue;
 181                 }
 182
 183                 if (_ignore_video && _ignore_audio && i->text.empty()) {
 184                         /* We're only interested in text and this content has none */
 185                         continue;
 186                 }
 187
 188                 shared_ptr<Decoder> old_decoder;
 189                 BOOST_FOREACH (shared_ptr<Piece> j, old_pieces) {
 190                         if (j->content == i) {
 191                                 old_decoder = j->decoder;
 192                                 break;
 193                         }
 194                 }
 195
 196                 shared_ptr<Decoder> decoder = decoder_factory (_film, i, _fast, _tolerant, old_decoder);
 197                 DCPOMATIC_ASSERT (decoder);
 198
 199                 FrameRateChange frc (_film, i);
 200
 201                 if (decoder->video && _ignore_video) {
 202                         decoder->video->set_ignore (true);
 203                 }
 204
 205                 if (decoder->audio && _ignore_audio) {
 206                         decoder->audio->set_ignore (true);
 207                 }
 208
 209                 if (_ignore_text) {
 210                         BOOST_FOREACH (shared_ptr<TextDecoder> i, decoder->text) {
 211                                 i->set_ignore (true);
 212                         }
 213                 }
 214
 215                 shared_ptr<DCPDecoder> dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
 216                 if (dcp) {
 217                         dcp->set_decode_referenced (_play_referenced);
 218                         if (_play_referenced) {
 219                                 dcp->set_forced_reduction (_dcp_decode_reduction);
 220                         }
 221                 }
 222
 223                 shared_ptr<Piece> piece (new Piece (i, decoder, frc));
 224                 _pieces.push_back (piece);
 225
 226                 if (decoder->video) {
 227                         if (i->video->frame_type() == VIDEO_FRAME_TYPE_3D_LEFT || i->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
 228                                 /* We need a Shuffler to cope with 3D L/R video data arriving out of sequence */
 229                                 decoder->video->Data.connect (bind (&Shuffler::video, _shuffler, weak_ptr<Piece>(piece), _1));
 230                         } else {
 231                                 decoder->video->Data.connect (bind (&Player::video, this, weak_ptr<Piece>(piece), _1));
 232                         }
 233                 }
 234
 235                 if (decoder->audio) {
 236                         decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
 237                 }
 238
 239                 list<shared_ptr<TextDecoder> >::const_iterator j = decoder->text.begin();
 240
 241                 while (j != decoder->text.end()) {
 242                         (*j)->BitmapStart.connect (
 243                                 bind(&Player::bitmap_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 244                                 );
 245                         (*j)->PlainStart.connect (
 246                                 bind(&Player::plain_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 247                                 );
 248                         (*j)->Stop.connect (
 249                                 bind(&Player::subtitle_stop, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 250                                 );
 251
 252                         ++j;
 253                 }
 254
 255                 if (decoder->atmos) {
 256                         decoder->atmos->Data.connect (bind(&Player::atmos, this, weak_ptr<Piece>(piece), _1));
 257                 }
 258         }
 259
 260         _stream_states.clear ();
 261         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
 262                 if (i->content->audio) {
 263                         BOOST_FOREACH (AudioStreamPtr j, i->content->audio->streams()) {
 264                                 _stream_states[j] = StreamState (i, i->content->position ());
 265                         }
 266                 }
 267         }
 268
 269         _black = Empty (_film, playlist(), bind(&have_video, _1), _playback_length);
 270         _silent = Empty (_film, playlist(), bind(&have_audio, _1), _playback_length);
 271
 272         _last_video_time = DCPTime ();
 273         _last_video_eyes = EYES_BOTH;
 274         _last_audio_time = DCPTime ();
 275 }
 276
 277 void
 278 Player::playlist_content_change (ChangeType type, int property, bool frequent)
 279 {
 280         if (type == CHANGE_TYPE_PENDING) {
 281                 /* The player content is probably about to change, so we can't carry on
 282                    until that has happened and we've rebuilt our pieces.  Stop pass()
 283                    and seek() from working until then.
 284                 */
 285                 ++_suspended;
 286         } else if (type == CHANGE_TYPE_DONE) {
 287                 /* A change in our content has gone through.  Re-build our pieces. */
 288                 setup_pieces ();
 289                 --_suspended;
 290         } else if (type == CHANGE_TYPE_CANCELLED) {
 291                 --_suspended;
 292         }
 293
 294         Change (type, property, frequent);
 295 }
 296
 297 void
 298 Player::set_video_container_size (dcp::Size s)
 299 {
 300         Change (CHANGE_TYPE_PENDING, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
 301
 302         {
 303                 boost::mutex::scoped_lock lm (_mutex);
 304
 305                 if (s == _video_container_size) {
 306                         lm.unlock ();
 307                         Change (CHANGE_TYPE_CANCELLED, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
 308                         return;
 309                 }
 310
 311                 _video_container_size = s;
 312
 313                 _black_image.reset (new Image (AV_PIX_FMT_RGB24, _video_container_size, true));
 314                 _black_image->make_black ();
 315         }
 316
 317         Change (CHANGE_TYPE_DONE, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
 318 }
 319
 320 void
 321 Player::playlist_change (ChangeType type)
 322 {
 323         if (type == CHANGE_TYPE_DONE) {
 324                 setup_pieces ();
 325         }
 326         Change (type, PlayerProperty::PLAYLIST, false);
 327 }
 328
 329 void
 330 Player::film_change (ChangeType type, Film::Property p)
 331 {
 332         /* Here we should notice Film properties that affect our output, and
 333            alert listeners that our output now would be different to how it was
 334            last time we were run.
 335         */
 336
 337         if (p == Film::CONTAINER) {
 338                 Change (type, PlayerProperty::FILM_CONTAINER, false);
 339         } else if (p == Film::VIDEO_FRAME_RATE) {
 340                 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
 341                    so we need new pieces here.
 342                 */
 343                 if (type == CHANGE_TYPE_DONE) {
 344                         setup_pieces ();
 345                 }
 346                 Change (type, PlayerProperty::FILM_VIDEO_FRAME_RATE, false);
 347         } else if (p == Film::AUDIO_PROCESSOR) {
 348                 if (type == CHANGE_TYPE_DONE && _film->audio_processor ()) {
 349                         boost::mutex::scoped_lock lm (_mutex);
 350                         _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
 351                 }
 352         } else if (p == Film::AUDIO_CHANNELS) {
 353                 if (type == CHANGE_TYPE_DONE) {
 354                         boost::mutex::scoped_lock lm (_mutex);
 355                         _audio_merger.clear ();
 356                 }
 357         }
 358 }
 359
 360 shared_ptr<PlayerVideo>
 361 Player::black_player_video_frame (Eyes eyes) const
 362 {
 363         return shared_ptr<PlayerVideo> (
 364                 new PlayerVideo (
 365                         shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
 366                         Crop (),
 367                         optional<double> (),
 368                         _video_container_size,
 369                         _video_container_size,
 370                         eyes,
 371                         PART_WHOLE,
 372                         PresetColourConversion::all().front().conversion,
 373                         VIDEO_RANGE_FULL,
 374                         boost::weak_ptr<Content>(),
 375                         boost::optional<Frame>(),
 376                         false
 377                 )
 378         );
 379 }
 380
 381 Frame
 382 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
 383 {
 384         DCPTime s = t - piece->content->position ();
 385         s = min (piece->content->length_after_trim(_film), s);
 386         s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
 387
 388         /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
 389            then convert that ContentTime to frames at the content's rate.  However this fails for
 390            situations like content at 29.9978733fps, DCP at 30fps.  The accuracy of the Time type is not
 391            enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
 392
 393            Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
 394         */
 395         return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
 396 }
 397
 398 DCPTime
 399 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
 400 {
 401         /* See comment in dcp_to_content_video */
 402         DCPTime const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime(piece->content->trim_start(), piece->frc);
 403         return d + piece->content->position();
 404 }
 405
 406 Frame
 407 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
 408 {
 409         DCPTime s = t - piece->content->position ();
 410         s = min (piece->content->length_after_trim(_film), s);
 411         /* See notes in dcp_to_content_video */
 412         return max (DCPTime (), DCPTime (piece->content->trim_start (), piece->frc) + s).frames_floor (_film->audio_frame_rate ());
 413 }
 414
 415 DCPTime
 416 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
 417 {
 418         /* See comment in dcp_to_content_video */
 419         return DCPTime::from_frames (f, _film->audio_frame_rate())
 420                 - DCPTime (piece->content->trim_start(), piece->frc)
 421                 + piece->content->position();
 422 }
 423
 424 ContentTime
 425 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
 426 {
 427         DCPTime s = t - piece->content->position ();
 428         s = min (piece->content->length_after_trim(_film), s);
 429         return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
 430 }
 431
 432 DCPTime
 433 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
 434 {
 435         return max (DCPTime (), DCPTime (t - piece->content->trim_start(), piece->frc) + piece->content->position());
 436 }
 437
 438 list<shared_ptr<Font> >
 439 Player::get_subtitle_fonts ()
 440 {
 441         boost::mutex::scoped_lock lm (_mutex);
 442
 443         list<shared_ptr<Font> > fonts;
 444         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
 445                 BOOST_FOREACH (shared_ptr<TextContent> j, i->content->text) {
 446                         /* XXX: things may go wrong if there are duplicate font IDs
 447                            with different font files.
 448                         */
 449                         list<shared_ptr<Font> > f = j->fonts ();
 450                         copy (f.begin(), f.end(), back_inserter (fonts));
 451                 }
 452         }
 453
 454         return fonts;
 455 }
 456
 457 /** Set this player never to produce any video data */
 458 void
 459 Player::set_ignore_video ()
 460 {
 461         boost::mutex::scoped_lock lm (_mutex);
 462         _ignore_video = true;
 463         setup_pieces_unlocked ();
 464 }
 465
 466 void
 467 Player::set_ignore_audio ()
 468 {
 469         boost::mutex::scoped_lock lm (_mutex);
 470         _ignore_audio = true;
 471         setup_pieces_unlocked ();
 472 }
 473
 474 void
 475 Player::set_ignore_text ()
 476 {
 477         boost::mutex::scoped_lock lm (_mutex);
 478         _ignore_text = true;
 479         setup_pieces_unlocked ();
 480 }
 481
 482 /** Set the player to always burn open texts into the image regardless of the content settings */
 483 void
 484 Player::set_always_burn_open_subtitles ()
 485 {
 486         boost::mutex::scoped_lock lm (_mutex);
 487         _always_burn_open_subtitles = true;
 488 }
 489
 490 /** Sets up the player to be faster, possibly at the expense of quality */
 491 void
 492 Player::set_fast ()
 493 {
 494         boost::mutex::scoped_lock lm (_mutex);
 495         _fast = true;
 496         setup_pieces_unlocked ();
 497 }
 498
 499 void
 500 Player::set_play_referenced ()
 501 {
 502         boost::mutex::scoped_lock lm (_mutex);
 503         _play_referenced = true;
 504         setup_pieces_unlocked ();
 505 }
 506
 507 static void
 508 maybe_add_asset (list<ReferencedReelAsset>& a, shared_ptr<dcp::ReelAsset> r, Frame reel_trim_start, Frame reel_trim_end, DCPTime from, int const ffr)
 509 {
 510         DCPOMATIC_ASSERT (r);
 511         r->set_entry_point (r->entry_point().get_value_or(0) + reel_trim_start);
 512         r->set_duration (r->actual_duration() - reel_trim_start - reel_trim_end);
 513         if (r->actual_duration() > 0) {
 514                 a.push_back (
 515                         ReferencedReelAsset(r, DCPTimePeriod(from, from + DCPTime::from_frames(r->actual_duration(), ffr)))
 516                         );
 517         }
 518 }
 519
 520 list<ReferencedReelAsset>
 521 Player::get_reel_assets ()
 522 {
 523         /* Does not require a lock on _mutex as it's only called from DCPEncoder */
 524
 525         list<ReferencedReelAsset> a;
 526
 527         BOOST_FOREACH (shared_ptr<Content> i, playlist()->content()) {
 528                 shared_ptr<DCPContent> j = dynamic_pointer_cast<DCPContent> (i);
 529                 if (!j) {
 530                         continue;
 531                 }
 532
 533                 scoped_ptr<DCPDecoder> decoder;
 534                 try {
 535                         decoder.reset (new DCPDecoder (_film, j, false, false, shared_ptr<DCPDecoder>()));
 536                 } catch (...) {
 537                         return a;
 538                 }
 539
 540                 DCPOMATIC_ASSERT (j->video_frame_rate ());
 541                 double const cfr = j->video_frame_rate().get();
 542                 Frame const trim_start = j->trim_start().frames_round (cfr);
 543                 Frame const trim_end = j->trim_end().frames_round (cfr);
 544                 int const ffr = _film->video_frame_rate ();
 545
 546                 /* position in the asset from the start */
 547                 int64_t offset_from_start = 0;
 548                 /* position in the asset from the end */
 549                 int64_t offset_from_end = 0;
 550                 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
 551                         /* Assume that main picture duration is the length of the reel */
 552                         offset_from_end += k->main_picture()->actual_duration();
 553                 }
 554
 555                 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
 556
 557                         /* Assume that main picture duration is the length of the reel */
 558                         int64_t const reel_duration = k->main_picture()->actual_duration();
 559
 560                         /* See doc/design/trim_reels.svg */
 561                         Frame const reel_trim_start = min(reel_duration, max(int64_t(0), trim_start - offset_from_start));
 562                         Frame const reel_trim_end =   min(reel_duration, max(int64_t(0), reel_duration - (offset_from_end - trim_end)));
 563
 564                         DCPTime const from = i->position() + DCPTime::from_frames (offset_from_start, _film->video_frame_rate());
 565                         if (j->reference_video ()) {
 566                                 maybe_add_asset (a, k->main_picture(), reel_trim_start, reel_trim_end, from, ffr);
 567                         }
 568
 569                         if (j->reference_audio ()) {
 570                                 maybe_add_asset (a, k->main_sound(), reel_trim_start, reel_trim_end, from, ffr);
 571                         }
 572
 573                         if (j->reference_text (TEXT_OPEN_SUBTITLE)) {
 574                                 maybe_add_asset (a, k->main_subtitle(), reel_trim_start, reel_trim_end, from, ffr);
 575                         }
 576
 577                         if (j->reference_text (TEXT_CLOSED_CAPTION)) {
 578                                 BOOST_FOREACH (shared_ptr<dcp::ReelClosedCaptionAsset> l, k->closed_captions()) {
 579                                         maybe_add_asset (a, l, reel_trim_start, reel_trim_end, from, ffr);
 580                                 }
 581                         }
 582
 583                         offset_from_start += reel_duration;
 584                         offset_from_end -= reel_duration;
 585                 }
 586         }
 587
 588         return a;
 589 }
 590
 591 bool
 592 Player::pass ()
 593 {
 594         boost::mutex::scoped_lock lm (_mutex);
 595
 596         if (_suspended) {
 597                 /* We can't pass in this state */
 598                 return false;
 599         }
 600
 601         if (_playback_length == DCPTime()) {
 602                 /* Special; just give one black frame */
 603                 emit_video (black_player_video_frame(EYES_BOTH), DCPTime());
 604                 return true;
 605         }
 606
 607         /* Find the decoder or empty which is farthest behind where we are and make it emit some data */
 608
 609         shared_ptr<Piece> earliest_content;
 610         optional<DCPTime> earliest_time;
 611
 612         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
 613                 if (i->done) {
 614                         continue;
 615                 }
 616
 617                 DCPTime const t = content_time_to_dcp (i, max(i->decoder->position(), i->content->trim_start()));
 618                 if (t > i->content->end(_film)) {
 619                         i->done = true;
 620                 } else {
 621
 622                         /* Given two choices at the same time, pick the one with texts so we see it before
 623                            the video.
 624                         */
 625                         if (!earliest_time || t < *earliest_time || (t == *earliest_time && !i->decoder->text.empty())) {
 626                                 earliest_time = t;
 627                                 earliest_content = i;
 628                         }
 629                 }
 630         }
 631
 632         bool done = false;
 633
 634         enum {
 635                 NONE,
 636                 CONTENT,
 637                 BLACK,
 638                 SILENT
 639         } which = NONE;
 640
 641         if (earliest_content) {
 642                 which = CONTENT;
 643         }
 644
 645         if (!_black.done() && !_ignore_video && (!earliest_time || _black.position() < *earliest_time)) {
 646                 earliest_time = _black.position ();
 647                 which = BLACK;
 648         }
 649
 650         if (!_silent.done() && !_ignore_audio && (!earliest_time || _silent.position() < *earliest_time)) {
 651                 earliest_time = _silent.position ();
 652                 which = SILENT;
 653         }
 654
 655         switch (which) {
 656         case CONTENT:
 657         {
 658                 earliest_content->done = earliest_content->decoder->pass ();
 659                 shared_ptr<DCPContent> dcp = dynamic_pointer_cast<DCPContent>(earliest_content->content);
 660                 if (dcp && !_play_referenced && dcp->reference_audio()) {
 661                         /* We are skipping some referenced DCP audio content, so we need to update _last_audio_time
 662                            to `hide' the fact that no audio was emitted during the referenced DCP (though
 663                            we need to behave as though it was).
 664                         */
 665                         _last_audio_time = dcp->end (_film);
 666                 }
 667                 break;
 668         }
 669         case BLACK:
 670                 LOG_DEBUG_PLAYER ("Emit black for gap at %1", to_string(_black.position()));
 671                 emit_video (black_player_video_frame(EYES_BOTH), _black.position());
 672                 _black.set_position (_black.position() + one_video_frame());
 673                 break;
 674         case SILENT:
 675         {
 676                 DCPTimePeriod period (_silent.period_at_position());
 677                 if (_last_audio_time) {
 678                         /* Sometimes the thing that happened last finishes fractionally before
 679                            or after this silence.  Bodge the start time of the silence to fix it.
 680                            I think this is nothing to worry about since we will just add or
 681                            remove a little silence at the end of some content.
 682                         */
 683                         int64_t const error = labs(period.from.get() - _last_audio_time->get());
 684                         /* Let's not worry about less than a frame at 24fps */
 685                         int64_t const too_much_error = DCPTime::from_frames(1, 24).get();
 686                         if (error >= too_much_error) {
 687                                 _film->log()->log(String::compose("Silence starting before or after last audio by %1", error), LogEntry::TYPE_ERROR);
 688                         }
 689                         DCPOMATIC_ASSERT (error < too_much_error);
 690                         period.from = *_last_audio_time;
 691                 }
 692                 if (period.duration() > one_video_frame()) {
 693                         period.to = period.from + one_video_frame();
 694                 }
 695                 fill_audio (period);
 696                 _silent.set_position (period.to);
 697                 break;
 698         }
 699         case NONE:
 700                 done = true;
 701                 break;
 702         }
 703
 704         /* Emit any audio that is ready */
 705
 706         /* Work out the time before which the audio is definitely all here.  This is the earliest last_push_end of one
 707            of our streams, or the position of the _silent.
 708         */
 709         DCPTime pull_to = _playback_length;
 710         for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
 711                 if (!i->second.piece->done && i->second.last_push_end < pull_to) {
 712                         pull_to = i->second.last_push_end;
 713                 }
 714         }
 715         if (!_silent.done() && _silent.position() < pull_to) {
 716                 pull_to = _silent.position();
 717         }
 718
 719         list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_to);
 720         for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
 721                 if (_last_audio_time && i->second < *_last_audio_time) {
 722                         /* This new data comes before the last we emitted (or the last seek); discard it */
 723                         pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
 724                         if (!cut.first) {
 725                                 continue;
 726                         }
 727                         *i = cut;
 728                 } else if (_last_audio_time && i->second > *_last_audio_time) {
 729                         /* There's a gap between this data and the last we emitted; fill with silence */
 730                         fill_audio (DCPTimePeriod (*_last_audio_time, i->second));
 731                 }
 732
 733                 emit_audio (i->first, i->second);
 734         }
 735
 736         if (done) {
 737                 _shuffler->flush ();
 738                 for (list<pair<shared_ptr<PlayerVideo>, DCPTime> >::const_iterator i = _delay.begin(); i != _delay.end(); ++i) {
 739                         do_emit_video(i->first, i->second);
 740                 }
 741         }
 742
 743         return done;
 744 }
 745
 746 /** @return Open subtitles for the frame at the given time, converted to images */
 747 optional<PositionImage>
 748 Player::open_subtitles_for_frame (DCPTime time) const
 749 {
 750         list<PositionImage> captions;
 751         int const vfr = _film->video_frame_rate();
 752
 753         BOOST_FOREACH (
 754                 PlayerText j,
 755                 _active_texts[TEXT_OPEN_SUBTITLE].get_burnt(DCPTimePeriod(time, time + DCPTime::from_frames(1, vfr)), _always_burn_open_subtitles)
 756                 ) {
 757
 758                 /* Bitmap subtitles */
 759                 BOOST_FOREACH (BitmapText i, j.bitmap) {
 760                         if (!i.image) {
 761                                 continue;
 762                         }
 763
 764                         /* i.image will already have been scaled to fit _video_container_size */
 765                         dcp::Size scaled_size (i.rectangle.width * _video_container_size.width, i.rectangle.height * _video_container_size.height);
 766
 767                         captions.push_back (
 768                                 PositionImage (
 769                                         i.image,
 770                                         Position<int> (
 771                                                 lrint (_video_container_size.width * i.rectangle.x),
 772                                                 lrint (_video_container_size.height * i.rectangle.y)
 773                                                 )
 774                                         )
 775                                 );
 776                 }
 777
 778                 /* String subtitles (rendered to an image) */
 779                 if (!j.string.empty ()) {
 780                         list<PositionImage> s = render_text (j.string, j.fonts, _video_container_size, time, vfr);
 781                         copy (s.begin(), s.end(), back_inserter (captions));
 782                 }
 783         }
 784
 785         if (captions.empty ()) {
 786                 return optional<PositionImage> ();
 787         }
 788
 789         return merge (captions);
 790 }
 791
 792 void
 793 Player::video (weak_ptr<Piece> wp, ContentVideo video)
 794 {
 795         shared_ptr<Piece> piece = wp.lock ();
 796         if (!piece) {
 797                 return;
 798         }
 799
 800         if (!piece->content->video->use()) {
 801                 return;
 802         }
 803
 804         FrameRateChange frc (_film, piece->content);
 805         if (frc.skip && (video.frame % 2) == 1) {
 806                 return;
 807         }
 808
 809         /* Time of the first frame we will emit */
 810         DCPTime const time = content_video_to_dcp (piece, video.frame);
 811
 812         /* Discard if it's before the content's period or the last accurate seek.  We can't discard
 813            if it's after the content's period here as in that case we still need to fill any gap between
 814            `now' and the end of the content's period.
 815         */
 816         if (time < piece->content->position() || (_last_video_time && time < *_last_video_time)) {
 817                 return;
 818         }
 819
 820         /* Fill gaps that we discover now that we have some video which needs to be emitted.
 821            This is where we need to fill to.
 822         */
 823         DCPTime fill_to = min (time, piece->content->end(_film));
 824
 825         if (_last_video_time) {
 826                 DCPTime fill_from = max (*_last_video_time, piece->content->position());
 827
 828                 /* Fill if we have more than half a frame to do */
 829                 if ((fill_to - fill_from) > one_video_frame() / 2) {
 830                         LastVideoMap::const_iterator last = _last_video.find (wp);
 831                         if (_film->three_d()) {
 832                                 Eyes fill_to_eyes = video.eyes;
 833                                 if (fill_to_eyes == EYES_BOTH) {
 834                                         fill_to_eyes = EYES_LEFT;
 835                                 }
 836                                 if (fill_to == piece->content->end(_film)) {
 837                                         /* Don't fill after the end of the content */
 838                                         fill_to_eyes = EYES_LEFT;
 839                                 }
 840                                 DCPTime j = fill_from;
 841                                 Eyes eyes = _last_video_eyes.get_value_or(EYES_LEFT);
 842                                 if (eyes == EYES_BOTH) {
 843                                         eyes = EYES_LEFT;
 844                                 }
 845                                 while (j < fill_to || eyes != fill_to_eyes) {
 846                                         if (last != _last_video.end()) {
 847                                                 LOG_DEBUG_PLAYER("Fill using last video at %1 in 3D mode", to_string(j));
 848                                                 shared_ptr<PlayerVideo> copy = last->second->shallow_copy();
 849                                                 copy->set_eyes (eyes);
 850                                                 emit_video (copy, j);
 851                                         } else {
 852                                                 LOG_DEBUG_PLAYER("Fill using black at %1 in 3D mode", to_string(j));
 853                                                 emit_video (black_player_video_frame(eyes), j);
 854                                         }
 855                                         if (eyes == EYES_RIGHT) {
 856                                                 j += one_video_frame();
 857                                         }
 858                                         eyes = increment_eyes (eyes);
 859                                 }
 860                         } else {
 861                                 for (DCPTime j = fill_from; j < fill_to; j += one_video_frame()) {
 862                                         if (last != _last_video.end()) {
 863                                                 emit_video (last->second, j);
 864                                         } else {
 865                                                 emit_video (black_player_video_frame(EYES_BOTH), j);
 866                                         }
 867                                 }
 868                         }
 869                 }
 870         }
 871
 872         _last_video[wp].reset (
 873                 new PlayerVideo (
 874                         video.image,
 875                         piece->content->video->crop (),
 876                         piece->content->video->fade (_film, video.frame),
 877                         scale_for_display(piece->content->video->scaled_size(_film->frame_size()), _video_container_size, _film->frame_size()),
 878                         _video_container_size,
 879                         video.eyes,
 880                         video.part,
 881                         piece->content->video->colour_conversion(),
 882                         piece->content->video->range(),
 883                         piece->content,
 884                         video.frame,
 885                         false
 886                         )
 887                 );
 888
 889         DCPTime t = time;
 890         for (int i = 0; i < frc.repeat; ++i) {
 891                 if (t < piece->content->end(_film)) {
 892                         emit_video (_last_video[wp], t);
 893                 }
 894                 t += one_video_frame ();
 895         }
 896 }
 897
 898 void
 899 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
 900 {
 901         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
 902
 903         shared_ptr<Piece> piece = wp.lock ();
 904         if (!piece) {
 905                 return;
 906         }
 907
 908         shared_ptr<AudioContent> content = piece->content->audio;
 909         DCPOMATIC_ASSERT (content);
 910
 911         int const rfr = content->resampled_frame_rate (_film);
 912
 913         /* Compute time in the DCP */
 914         DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame);
 915         /* And the end of this block in the DCP */
 916         DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), rfr);
 917
 918         /* Remove anything that comes before the start or after the end of the content */
 919         if (time < piece->content->position()) {
 920                 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
 921                 if (!cut.first) {
 922                         /* This audio is entirely discarded */
 923                         return;
 924                 }
 925                 content_audio.audio = cut.first;
 926                 time = cut.second;
 927         } else if (time > piece->content->end(_film)) {
 928                 /* Discard it all */
 929                 return;
 930         } else if (end > piece->content->end(_film)) {
 931                 Frame const remaining_frames = DCPTime(piece->content->end(_film) - time).frames_round(rfr);
 932                 if (remaining_frames == 0) {
 933                         return;
 934                 }
 935                 content_audio.audio.reset (new AudioBuffers(content_audio.audio, remaining_frames, 0));
 936         }
 937
 938         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
 939
 940         /* Gain */
 941
 942         if (content->gain() != 0) {
 943                 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
 944                 gain->apply_gain (content->gain ());
 945                 content_audio.audio = gain;
 946         }
 947
 948         /* Remap */
 949
 950         content_audio.audio = remap (content_audio.audio, _film->audio_channels(), stream->mapping());
 951
 952         /* Process */
 953
 954         if (_audio_processor) {
 955                 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
 956         }
 957
 958         /* Push */
 959
 960         _audio_merger.push (content_audio.audio, time);
 961         DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
 962         _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
 963 }
 964
 965 void
 966 Player::bitmap_text_start (weak_ptr<Piece> wp, weak_ptr<const TextContent> wc, ContentBitmapText subtitle)
 967 {
 968         shared_ptr<Piece> piece = wp.lock ();
 969         shared_ptr<const TextContent> text = wc.lock ();
 970         if (!piece || !text) {
 971                 return;
 972         }
 973
 974         /* Apply content's subtitle offsets */
 975         subtitle.sub.rectangle.x += text->x_offset ();
 976         subtitle.sub.rectangle.y += text->y_offset ();
 977
 978         /* Apply a corrective translation to keep the subtitle centred after the scale that is coming up */
 979         subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * ((text->x_scale() - 1) / 2);
 980         subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * ((text->y_scale() - 1) / 2);
 981
 982         /* Apply content's subtitle scale */
 983         subtitle.sub.rectangle.width *= text->x_scale ();
 984         subtitle.sub.rectangle.height *= text->y_scale ();
 985
 986         PlayerText ps;
 987         shared_ptr<Image> image = subtitle.sub.image;
 988
 989         /* We will scale the subtitle up to fit _video_container_size */
 990         int const width = subtitle.sub.rectangle.width * _video_container_size.width;
 991         int const height = subtitle.sub.rectangle.height * _video_container_size.height;
 992         if (width == 0 || height == 0) {
 993                 return;
 994         }
 995
 996         dcp::Size scaled_size (width, height);
 997         ps.bitmap.push_back (BitmapText(image->scale(scaled_size, dcp::YUV_TO_RGB_REC601, image->pixel_format(), true, _fast), subtitle.sub.rectangle));
 998         DCPTime from (content_time_to_dcp (piece, subtitle.from()));
 999
1000         _active_texts[text->type()].add_from (wc, ps, from);
1001 }
1002
1003 void
1004 Player::plain_text_start (weak_ptr<Piece> wp, weak_ptr<const TextContent> wc, ContentStringText subtitle)
1005 {
1006         shared_ptr<Piece> piece = wp.lock ();
1007         shared_ptr<const TextContent> text = wc.lock ();
1008         if (!piece || !text) {
1009                 return;
1010         }
1011
1012         PlayerText ps;
1013         DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
1014
1015         if (from > piece->content->end(_film)) {
1016                 return;
1017         }
1018
1019         BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
1020                 s.set_h_position (s.h_position() + text->x_offset ());
1021                 s.set_v_position (s.v_position() + text->y_offset ());
1022                 float const xs = text->x_scale();
1023                 float const ys = text->y_scale();
1024                 float size = s.size();
1025
1026                 /* Adjust size to express the common part of the scaling;
1027                    e.g. if xs = ys = 0.5 we scale size by 2.
1028                 */
1029                 if (xs > 1e-5 && ys > 1e-5) {
1030                         size *= 1 / min (1 / xs, 1 / ys);
1031                 }
1032                 s.set_size (size);
1033
1034                 /* Then express aspect ratio changes */
1035                 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
1036                         s.set_aspect_adjust (xs / ys);
1037                 }
1038
1039                 s.set_in (dcp::Time(from.seconds(), 1000));
1040                 ps.string.push_back (StringText (s, text->outline_width()));
1041                 ps.add_fonts (text->fonts ());
1042         }
1043
1044         _active_texts[text->type()].add_from (wc, ps, from);
1045 }
1046
1047 void
1048 Player::subtitle_stop (weak_ptr<Piece> wp, weak_ptr<const TextContent> wc, ContentTime to)
1049 {
1050         shared_ptr<const TextContent> text = wc.lock ();
1051         if (!text) {
1052                 return;
1053         }
1054
1055         if (!_active_texts[text->type()].have(wc)) {
1056                 return;
1057         }
1058
1059         shared_ptr<Piece> piece = wp.lock ();
1060         if (!piece) {
1061                 return;
1062         }
1063
1064         DCPTime const dcp_to = content_time_to_dcp (piece, to);
1065
1066         if (dcp_to > piece->content->end(_film)) {
1067                 return;
1068         }
1069
1070         pair<PlayerText, DCPTime> from = _active_texts[text->type()].add_to (wc, dcp_to);
1071
1072         bool const always = (text->type() == TEXT_OPEN_SUBTITLE && _always_burn_open_subtitles);
1073         if (text->use() && !always && !text->burn()) {
1074                 Text (from.first, text->type(), text->dcp_track().get_value_or(DCPTextTrack()), DCPTimePeriod (from.second, dcp_to));
1075         }
1076 }
1077
1078 void
1079 Player::seek (DCPTime time, bool accurate)
1080 {
1081         boost::mutex::scoped_lock lm (_mutex);
1082
1083         if (_suspended) {
1084                 /* We can't seek in this state */
1085                 return;
1086         }
1087
1088         if (_shuffler) {
1089                 _shuffler->clear ();
1090         }
1091
1092         _delay.clear ();
1093
1094         if (_audio_processor) {
1095                 _audio_processor->flush ();
1096         }
1097
1098         _audio_merger.clear ();
1099         for (int i = 0; i < TEXT_COUNT; ++i) {
1100                 _active_texts[i].clear ();
1101         }
1102
1103         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
1104                 if (time < i->content->position()) {
1105                         /* Before; seek to the start of the content.  Even if this request is for an inaccurate seek
1106                            we must seek this (following) content accurately, otherwise when we come to the end of the current
1107                            content we may not start right at the beginning of the next, causing a gap (if the next content has
1108                            been trimmed to a point between keyframes, or something).
1109                         */
1110                         i->decoder->seek (dcp_to_content_time (i, i->content->position()), true);
1111                         i->done = false;
1112                 } else if (i->content->position() <= time && time < i->content->end(_film)) {
1113                         /* During; seek to position */
1114                         i->decoder->seek (dcp_to_content_time (i, time), accurate);
1115                         i->done = false;
1116                 } else {
1117                         /* After; this piece is done */
1118                         i->done = true;
1119                 }
1120         }
1121
1122         if (accurate) {
1123                 _last_video_time = time;
1124                 _last_video_eyes = EYES_LEFT;
1125                 _last_audio_time = time;
1126         } else {
1127                 _last_video_time = optional<DCPTime>();
1128                 _last_video_eyes = optional<Eyes>();
1129                 _last_audio_time = optional<DCPTime>();
1130         }
1131
1132         _black.set_position (time);
1133         _silent.set_position (time);
1134
1135         _last_video.clear ();
1136 }
1137
1138 void
1139 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1140 {
1141         /* We need a delay to give a little wiggle room to ensure that relevent subtitles arrive at the
1142            player before the video that requires them.
1143         */
1144         _delay.push_back (make_pair (pv, time));
1145
1146         if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
1147                 _last_video_time = time + one_video_frame();
1148         }
1149         _last_video_eyes = increment_eyes (pv->eyes());
1150
1151         if (_delay.size() < 3) {
1152                 return;
1153         }
1154
1155         pair<shared_ptr<PlayerVideo>, DCPTime> to_do = _delay.front();
1156         _delay.pop_front();
1157         do_emit_video (to_do.first, to_do.second);
1158 }
1159
1160 void
1161 Player::do_emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1162 {
1163         if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
1164                 for (int i = 0; i < TEXT_COUNT; ++i) {
1165                         _active_texts[i].clear_before (time);
1166                 }
1167         }
1168
1169         optional<PositionImage> subtitles = open_subtitles_for_frame (time);
1170         if (subtitles) {
1171                 pv->set_text (subtitles.get ());
1172         }
1173
1174         Video (pv, time);
1175 }
1176
1177 void
1178 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1179 {
1180         /* Log if the assert below is about to fail */
1181         if (_last_audio_time && labs(time.get() - _last_audio_time->get()) > 1) {
1182                 _film->log()->log(String::compose("Out-of-sequence emit %1 vs %2", to_string(time), to_string(*_last_audio_time)), LogEntry::TYPE_WARNING);
1183         }
1184
1185         /* This audio must follow on from the previous, allowing for half a sample (at 48kHz) leeway */
1186         DCPOMATIC_ASSERT (!_last_audio_time || labs(time.get() - _last_audio_time->get()) < 2);
1187         Audio (data, time, _film->audio_frame_rate());
1188         _last_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate());
1189 }
1190
1191 void
1192 Player::fill_audio (DCPTimePeriod period)
1193 {
1194         if (period.from == period.to) {
1195                 return;
1196         }
1197
1198         DCPOMATIC_ASSERT (period.from < period.to);
1199
1200         DCPTime t = period.from;
1201         while (t < period.to) {
1202                 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
1203                 Frame const samples = block.frames_round(_film->audio_frame_rate());
1204                 if (samples) {
1205                         shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
1206                         silence->make_silent ();
1207                         emit_audio (silence, t);
1208                 }
1209                 t += block;
1210         }
1211 }
1212
1213 DCPTime
1214 Player::one_video_frame () const
1215 {
1216         return DCPTime::from_frames (1, _film->video_frame_rate ());
1217 }
1218
1219 pair<shared_ptr<AudioBuffers>, DCPTime>
1220 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1221 {
1222         DCPTime const discard_time = discard_to - time;
1223         Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1224         Frame remaining_frames = audio->frames() - discard_frames;
1225         if (remaining_frames <= 0) {
1226                 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1227         }
1228         shared_ptr<AudioBuffers> cut (new AudioBuffers(audio, remaining_frames, discard_frames));
1229         return make_pair(cut, time + discard_time);
1230 }
1231
1232 void
1233 Player::set_dcp_decode_reduction (optional<int> reduction)
1234 {
1235         Change (CHANGE_TYPE_PENDING, PlayerProperty::DCP_DECODE_REDUCTION, false);
1236
1237         {
1238                 boost::mutex::scoped_lock lm (_mutex);
1239
1240                 if (reduction == _dcp_decode_reduction) {
1241                         lm.unlock ();
1242                         Change (CHANGE_TYPE_CANCELLED, PlayerProperty::DCP_DECODE_REDUCTION, false);
1243                         return;
1244                 }
1245
1246                 _dcp_decode_reduction = reduction;
1247                 setup_pieces_unlocked ();
1248         }
1249
1250         Change (CHANGE_TYPE_DONE, PlayerProperty::DCP_DECODE_REDUCTION, false);
1251 }
1252
1253 optional<DCPTime>
1254 Player::content_time_to_dcp (shared_ptr<Content> content, ContentTime t)
1255 {
1256         boost::mutex::scoped_lock lm (_mutex);
1257
1258         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
1259                 if (i->content == content) {
1260                         return content_time_to_dcp (i, t);
1261                 }
1262         }
1263
1264         /* We couldn't find this content; perhaps things are being changed over */
1265         return optional<DCPTime>();
1266 }
1267
1268
1269 shared_ptr<const Playlist>
1270 Player::playlist () const
1271 {
1272         return _playlist ? _playlist : _film->playlist();
1273 }
1274
1275
1276 void
1277 Player::atmos (weak_ptr<Piece>, ContentAtmos data)
1278 {
1279         Atmos (data.data, DCPTime::from_frames(data.frame, _film->video_frame_rate()), data.metadata);
1280 }
1281