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 #if BOOST_VERSION >= 106100
  82 using namespace boost::placeholders;
  83 #endif
  84 using namespace dcpomatic;
  85
  86 int const PlayerProperty::VIDEO_CONTAINER_SIZE = 700;
  87 int const PlayerProperty::PLAYLIST = 701;
  88 int const PlayerProperty::FILM_CONTAINER = 702;
  89 int const PlayerProperty::FILM_VIDEO_FRAME_RATE = 703;
  90 int const PlayerProperty::DCP_DECODE_REDUCTION = 704;
  91 int const PlayerProperty::PLAYBACK_LENGTH = 705;
  92
  93 Player::Player (shared_ptr<const Film> film)
  94         : _film (film)
  95         , _suspended (0)
  96         , _ignore_video (false)
  97         , _ignore_audio (false)
  98         , _ignore_text (false)
  99         , _always_burn_open_subtitles (false)
 100         , _fast (false)
 101         , _tolerant (film->tolerant())
 102         , _play_referenced (false)
 103         , _audio_merger (_film->audio_frame_rate())
 104         , _shuffler (0)
 105 {
 106         construct ();
 107 }
 108
 109 Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist_)
 110         : _film (film)
 111         , _playlist (playlist_)
 112         , _suspended (0)
 113         , _ignore_video (false)
 114         , _ignore_audio (false)
 115         , _ignore_text (false)
 116         , _always_burn_open_subtitles (false)
 117         , _fast (false)
 118         , _tolerant (film->tolerant())
 119         , _play_referenced (false)
 120         , _audio_merger (_film->audio_frame_rate())
 121         , _shuffler (0)
 122 {
 123         construct ();
 124 }
 125
 126 void
 127 Player::construct ()
 128 {
 129         _film_changed_connection = _film->Change.connect (bind (&Player::film_change, this, _1, _2));
 130         /* The butler must hear about this first, so since we are proxying this through to the butler we must
 131            be first.
 132         */
 133         _playlist_change_connection = playlist()->Change.connect (bind (&Player::playlist_change, this, _1), boost::signals2::at_front);
 134         _playlist_content_change_connection = playlist()->ContentChange.connect (bind(&Player::playlist_content_change, this, _1, _3, _4));
 135         set_video_container_size (_film->frame_size ());
 136
 137         film_change (CHANGE_TYPE_DONE, Film::AUDIO_PROCESSOR);
 138
 139         setup_pieces ();
 140         seek (DCPTime (), true);
 141 }
 142
 143 Player::~Player ()
 144 {
 145         delete _shuffler;
 146 }
 147
 148 void
 149 Player::setup_pieces ()
 150 {
 151         boost::mutex::scoped_lock lm (_mutex);
 152         setup_pieces_unlocked ();
 153 }
 154
 155
 156 bool
 157 have_video (shared_ptr<const Content> content)
 158 {
 159         return static_cast<bool>(content->video) && content->video->use();
 160 }
 161
 162 bool
 163 have_audio (shared_ptr<const Content> content)
 164 {
 165         return static_cast<bool>(content->audio);
 166 }
 167
 168 void
 169 Player::setup_pieces_unlocked ()
 170 {
 171         _playback_length = _playlist ? _playlist->length(_film) : _film->length();
 172
 173         list<shared_ptr<Piece> > old_pieces = _pieces;
 174         _pieces.clear ();
 175
 176         delete _shuffler;
 177         _shuffler = new Shuffler();
 178         _shuffler->Video.connect(bind(&Player::video, this, _1, _2));
 179
 180         BOOST_FOREACH (shared_ptr<Content> i, playlist()->content()) {
 181
 182                 if (!i->paths_valid ()) {
 183                         continue;
 184                 }
 185
 186                 if (_ignore_video && _ignore_audio && i->text.empty()) {
 187                         /* We're only interested in text and this content has none */
 188                         continue;
 189                 }
 190
 191                 shared_ptr<Decoder> old_decoder;
 192                 /* XXX: needs to check vector of Content and use the old decoders, but
 193                  * this will all be different as we have to coalesce content before
 194                  * this happens.
 195                 BOOST_FOREACH (shared_ptr<Piece> j, old_pieces) {
 196                         if (j->content == i) {
 197                                 old_decoder = j->decoder;
 198                                 break;
 199                         }
 200                 }
 201                 */
 202
 203                 shared_ptr<Decoder> decoder = decoder_factory (_film, i, _fast, _tolerant, old_decoder);
 204                 DCPOMATIC_ASSERT (decoder);
 205
 206                 FrameRateChange frc (_film, i);
 207
 208                 if (decoder->video && _ignore_video) {
 209                         decoder->video->set_ignore (true);
 210                 }
 211
 212                 if (decoder->audio && _ignore_audio) {
 213                         decoder->audio->set_ignore (true);
 214                 }
 215
 216                 if (_ignore_text) {
 217                         BOOST_FOREACH (shared_ptr<TextDecoder> i, decoder->text) {
 218                                 i->set_ignore (true);
 219                         }
 220                 }
 221
 222                 shared_ptr<DCPDecoder> dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
 223                 if (dcp) {
 224                         dcp->set_decode_referenced (_play_referenced);
 225                         if (_play_referenced) {
 226                                 dcp->set_forced_reduction (_dcp_decode_reduction);
 227                         }
 228                 }
 229
 230                 shared_ptr<Piece> piece (new Piece (i, decoder, frc));
 231                 _pieces.push_back (piece);
 232
 233                 if (decoder->video) {
 234                         if (i->video->frame_type() == VIDEO_FRAME_TYPE_3D_LEFT || i->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
 235                                 /* We need a Shuffler to cope with 3D L/R video data arriving out of sequence */
 236                                 decoder->video->Data.connect (bind (&Shuffler::video, _shuffler, weak_ptr<Piece>(piece), _1));
 237                         } else {
 238                                 decoder->video->Data.connect (bind (&Player::video, this, weak_ptr<Piece>(piece), _1));
 239                         }
 240                 }
 241
 242                 if (decoder->audio) {
 243                         decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
 244                 }
 245
 246                 list<shared_ptr<TextDecoder> >::const_iterator j = decoder->text.begin();
 247
 248                 while (j != decoder->text.end()) {
 249                         (*j)->BitmapStart.connect (
 250                                 bind(&Player::bitmap_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 251                                 );
 252                         (*j)->PlainStart.connect (
 253                                 bind(&Player::plain_text_start, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 254                                 );
 255                         (*j)->Stop.connect (
 256                                 bind(&Player::subtitle_stop, this, weak_ptr<Piece>(piece), weak_ptr<const TextContent>((*j)->content()), _1)
 257                                 );
 258
 259                         ++j;
 260                 }
 261
 262                 if (decoder->atmos) {
 263                         decoder->atmos->Data.connect (bind(&Player::atmos, this, weak_ptr<Piece>(piece), _1));
 264                 }
 265         }
 266
 267         _black = Empty (_film, playlist(), bind(&have_video, _1), _playback_length);
 268         _silent = Empty (_film, playlist(), bind(&have_audio, _1), _playback_length);
 269
 270         _last_video_time = DCPTime ();
 271         _last_video_eyes = EYES_BOTH;
 272         _last_audio_time = DCPTime ();
 273 }
 274
 275 void
 276 Player::playlist_content_change (ChangeType type, int property, bool frequent)
 277 {
 278         if (property == VideoContentProperty::CROP) {
 279                 if (type == CHANGE_TYPE_DONE) {
 280                         dcp::Size const vcs = video_container_size();
 281                         boost::mutex::scoped_lock lm (_mutex);
 282                         for (list<pair<shared_ptr<PlayerVideo>, DCPTime> >::const_iterator i = _delay.begin(); i != _delay.end(); ++i) {
 283                                 i->first->reset_metadata (_film, vcs);
 284                         }
 285                 }
 286         } else {
 287                 if (type == CHANGE_TYPE_PENDING) {
 288                         /* The player content is probably about to change, so we can't carry on
 289                            until that has happened and we've rebuilt our pieces.  Stop pass()
 290                            and seek() from working until then.
 291                         */
 292                         ++_suspended;
 293                 } else if (type == CHANGE_TYPE_DONE) {
 294                         /* A change in our content has gone through.  Re-build our pieces. */
 295                         setup_pieces ();
 296                         --_suspended;
 297                 } else if (type == CHANGE_TYPE_CANCELLED) {
 298                         --_suspended;
 299                 }
 300         }
 301
 302         Change (type, property, frequent);
 303 }
 304
 305 void
 306 Player::set_video_container_size (dcp::Size s)
 307 {
 308         Change (CHANGE_TYPE_PENDING, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
 309
 310         {
 311                 boost::mutex::scoped_lock lm (_mutex);
 312
 313                 if (s == _video_container_size) {
 314                         lm.unlock ();
 315                         Change (CHANGE_TYPE_CANCELLED, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
 316                         return;
 317                 }
 318
 319                 _video_container_size = s;
 320
 321                 _black_image.reset (new Image (AV_PIX_FMT_RGB24, _video_container_size, true));
 322                 _black_image->make_black ();
 323         }
 324
 325         Change (CHANGE_TYPE_DONE, PlayerProperty::VIDEO_CONTAINER_SIZE, false);
 326 }
 327
 328 void
 329 Player::playlist_change (ChangeType type)
 330 {
 331         if (type == CHANGE_TYPE_DONE) {
 332                 setup_pieces ();
 333         }
 334         Change (type, PlayerProperty::PLAYLIST, false);
 335 }
 336
 337 void
 338 Player::film_change (ChangeType type, Film::Property p)
 339 {
 340         /* Here we should notice Film properties that affect our output, and
 341            alert listeners that our output now would be different to how it was
 342            last time we were run.
 343         */
 344
 345         if (p == Film::CONTAINER) {
 346                 Change (type, PlayerProperty::FILM_CONTAINER, false);
 347         } else if (p == Film::VIDEO_FRAME_RATE) {
 348                 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
 349                    so we need new pieces here.
 350                 */
 351                 if (type == CHANGE_TYPE_DONE) {
 352                         setup_pieces ();
 353                 }
 354                 Change (type, PlayerProperty::FILM_VIDEO_FRAME_RATE, false);
 355         } else if (p == Film::AUDIO_PROCESSOR) {
 356                 if (type == CHANGE_TYPE_DONE && _film->audio_processor ()) {
 357                         boost::mutex::scoped_lock lm (_mutex);
 358                         _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
 359                 }
 360         } else if (p == Film::AUDIO_CHANNELS) {
 361                 if (type == CHANGE_TYPE_DONE) {
 362                         boost::mutex::scoped_lock lm (_mutex);
 363                         _audio_merger.clear ();
 364                 }
 365         }
 366 }
 367
 368 shared_ptr<PlayerVideo>
 369 Player::black_player_video_frame (Eyes eyes) const
 370 {
 371         return shared_ptr<PlayerVideo> (
 372                 new PlayerVideo (
 373                         shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
 374                         Crop (),
 375                         optional<double> (),
 376                         _video_container_size,
 377                         _video_container_size,
 378                         eyes,
 379                         PART_WHOLE,
 380                         PresetColourConversion::all().front().conversion,
 381                         VIDEO_RANGE_FULL,
 382                         boost::weak_ptr<Content>(),
 383                         boost::optional<Frame>(),
 384                         false
 385                 )
 386         );
 387 }
 388
 389 Frame
 390 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
 391 {
 392         DCPTime s = t - piece->content->position ();
 393         s = min (piece->content->length_after_trim(_film), s);
 394         s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
 395
 396         /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
 397            then convert that ContentTime to frames at the content's rate.  However this fails for
 398            situations like content at 29.9978733fps, DCP at 30fps.  The accuracy of the Time type is not
 399            enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
 400
 401            Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
 402         */
 403         return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
 404 }
 405
 406 DCPTime
 407 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
 408 {
 409         /* See comment in dcp_to_content_video */
 410         DCPTime const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime(piece->content->trim_start(), piece->frc);
 411         return d + piece->content->position();
 412 }
 413
 414 Frame
 415 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
 416 {
 417         DCPTime s = t - piece->content->position ();
 418         s = min (piece->content->length_after_trim(_film), s);
 419         /* See notes in dcp_to_content_video */
 420         return max (DCPTime (), DCPTime (piece->content->trim_start (), piece->frc) + s).frames_floor (_film->audio_frame_rate ());
 421 }
 422
 423 DCPTime
 424 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
 425 {
 426         /* See comment in dcp_to_content_video */
 427         return DCPTime::from_frames (f, _film->audio_frame_rate())
 428                 - DCPTime (piece->content->trim_start(), piece->frc)
 429                 + piece->content->position();
 430 }
 431
 432 ContentTime
 433 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
 434 {
 435         DCPTime s = t - piece->content->position ();
 436         s = min (piece->content->length_after_trim(_film), s);
 437         return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
 438 }
 439
 440 DCPTime
 441 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
 442 {
 443         return max (DCPTime (), DCPTime (t - piece->content->trim_start(), piece->frc) + piece->content->position());
 444 }
 445
 446 list<shared_ptr<Font> >
 447 Player::get_subtitle_fonts ()
 448 {
 449         boost::mutex::scoped_lock lm (_mutex);
 450
 451         list<shared_ptr<Font> > fonts;
 452         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
 453                 BOOST_FOREACH (shared_ptr<TextContent> j, i->content->text) {
 454                         /* XXX: things may go wrong if there are duplicate font IDs
 455                            with different font files.
 456                         */
 457                         list<shared_ptr<Font> > f = j->fonts ();
 458                         copy (f.begin(), f.end(), back_inserter (fonts));
 459                 }
 460         }
 461
 462         return fonts;
 463 }
 464
 465 /** Set this player never to produce any video data */
 466 void
 467 Player::set_ignore_video ()
 468 {
 469         boost::mutex::scoped_lock lm (_mutex);
 470         _ignore_video = true;
 471         setup_pieces_unlocked ();
 472 }
 473
 474 void
 475 Player::set_ignore_audio ()
 476 {
 477         boost::mutex::scoped_lock lm (_mutex);
 478         _ignore_audio = true;
 479         setup_pieces_unlocked ();
 480 }
 481
 482 void
 483 Player::set_ignore_text ()
 484 {
 485         boost::mutex::scoped_lock lm (_mutex);
 486         _ignore_text = true;
 487         setup_pieces_unlocked ();
 488 }
 489
 490 /** Set the player to always burn open texts into the image regardless of the content settings */
 491 void
 492 Player::set_always_burn_open_subtitles ()
 493 {
 494         boost::mutex::scoped_lock lm (_mutex);
 495         _always_burn_open_subtitles = true;
 496 }
 497
 498 /** Sets up the player to be faster, possibly at the expense of quality */
 499 void
 500 Player::set_fast ()
 501 {
 502         boost::mutex::scoped_lock lm (_mutex);
 503         _fast = true;
 504         setup_pieces_unlocked ();
 505 }
 506
 507 void
 508 Player::set_play_referenced ()
 509 {
 510         boost::mutex::scoped_lock lm (_mutex);
 511         _play_referenced = true;
 512         setup_pieces_unlocked ();
 513 }
 514
 515 static void
 516 maybe_add_asset (list<ReferencedReelAsset>& a, shared_ptr<dcp::ReelAsset> r, Frame reel_trim_start, Frame reel_trim_end, DCPTime from, int const ffr)
 517 {
 518         DCPOMATIC_ASSERT (r);
 519         r->set_entry_point (r->entry_point().get_value_or(0) + reel_trim_start);
 520         r->set_duration (r->actual_duration() - reel_trim_start - reel_trim_end);
 521         if (r->actual_duration() > 0) {
 522                 a.push_back (
 523                         ReferencedReelAsset(r, DCPTimePeriod(from, from + DCPTime::from_frames(r->actual_duration(), ffr)))
 524                         );
 525         }
 526 }
 527
 528 list<ReferencedReelAsset>
 529 Player::get_reel_assets ()
 530 {
 531         /* Does not require a lock on _mutex as it's only called from DCPEncoder */
 532
 533         list<ReferencedReelAsset> a;
 534
 535         BOOST_FOREACH (shared_ptr<Content> i, playlist()->content()) {
 536                 shared_ptr<DCPContent> j = dynamic_pointer_cast<DCPContent> (i);
 537                 if (!j) {
 538                         continue;
 539                 }
 540
 541                 scoped_ptr<DCPDecoder> decoder;
 542                 try {
 543                         decoder.reset (new DCPDecoder (_film, j, false, false, shared_ptr<DCPDecoder>()));
 544                 } catch (...) {
 545                         return a;
 546                 }
 547
 548                 DCPOMATIC_ASSERT (j->video_frame_rate ());
 549                 double const cfr = j->video_frame_rate().get();
 550                 Frame const trim_start = j->trim_start().frames_round (cfr);
 551                 Frame const trim_end = j->trim_end().frames_round (cfr);
 552                 int const ffr = _film->video_frame_rate ();
 553
 554                 /* position in the asset from the start */
 555                 int64_t offset_from_start = 0;
 556                 /* position in the asset from the end */
 557                 int64_t offset_from_end = 0;
 558                 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
 559                         /* Assume that main picture duration is the length of the reel */
 560                         offset_from_end += k->main_picture()->actual_duration();
 561                 }
 562
 563                 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
 564
 565                         /* Assume that main picture duration is the length of the reel */
 566                         int64_t const reel_duration = k->main_picture()->actual_duration();
 567
 568                         /* See doc/design/trim_reels.svg */
 569                         Frame const reel_trim_start = min(reel_duration, max(int64_t(0), trim_start - offset_from_start));
 570                         Frame const reel_trim_end =   min(reel_duration, max(int64_t(0), reel_duration - (offset_from_end - trim_end)));
 571
 572                         DCPTime const from = i->position() + DCPTime::from_frames (offset_from_start, _film->video_frame_rate());
 573                         if (j->reference_video ()) {
 574                                 maybe_add_asset (a, k->main_picture(), reel_trim_start, reel_trim_end, from, ffr);
 575                         }
 576
 577                         if (j->reference_audio ()) {
 578                                 maybe_add_asset (a, k->main_sound(), reel_trim_start, reel_trim_end, from, ffr);
 579                         }
 580
 581                         if (j->reference_text (TEXT_OPEN_SUBTITLE)) {
 582                                 maybe_add_asset (a, k->main_subtitle(), reel_trim_start, reel_trim_end, from, ffr);
 583                         }
 584
 585                         if (j->reference_text (TEXT_CLOSED_CAPTION)) {
 586                                 BOOST_FOREACH (shared_ptr<dcp::ReelClosedCaptionAsset> l, k->closed_captions()) {
 587                                         maybe_add_asset (a, l, reel_trim_start, reel_trim_end, from, ffr);
 588                                 }
 589                         }
 590
 591                         offset_from_start += reel_duration;
 592                         offset_from_end -= reel_duration;
 593                 }
 594         }
 595
 596         return a;
 597 }
 598
 599 bool
 600 Player::pass ()
 601 {
 602         boost::mutex::scoped_lock lm (_mutex);
 603
 604         if (_suspended) {
 605                 /* We can't pass in this state */
 606                 LOG_DEBUG_PLAYER_NC ("Player is suspended");
 607                 return false;
 608         }
 609
 610         if (_playback_length == DCPTime()) {
 611                 /* Special; just give one black frame */
 612                 emit_video (black_player_video_frame(EYES_BOTH), DCPTime());
 613                 return true;
 614         }
 615
 616         /* Find the decoder or empty which is farthest behind where we are and make it emit some data */
 617
 618         shared_ptr<Piece> earliest_content;
 619         optional<DCPTime> earliest_time;
 620
 621         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
 622                 if (i->done) {
 623                         continue;
 624                 }
 625
 626                 DCPTime const t = content_time_to_dcp (i, max(i->decoder->position(), i->content->trim_start()));
 627                 if (t > i->content->end(_film)) {
 628                         i->done = true;
 629                 } else {
 630
 631                         /* Given two choices at the same time, pick the one with texts so we see it before
 632                            the video.
 633                         */
 634                         if (!earliest_time || t < *earliest_time || (t == *earliest_time && !i->decoder->text.empty())) {
 635                                 earliest_time = t;
 636                                 earliest_content = i;
 637                         }
 638                 }
 639         }
 640
 641         bool done = false;
 642
 643         enum {
 644                 NONE,
 645                 CONTENT,
 646                 BLACK,
 647                 SILENT
 648         } which = NONE;
 649
 650         if (earliest_content) {
 651                 which = CONTENT;
 652         }
 653
 654         if (!_black.done() && !_ignore_video && (!earliest_time || _black.position() < *earliest_time)) {
 655                 earliest_time = _black.position ();
 656                 which = BLACK;
 657         }
 658
 659         if (!_silent.done() && !_ignore_audio && (!earliest_time || _silent.position() < *earliest_time)) {
 660                 earliest_time = _silent.position ();
 661                 which = SILENT;
 662         }
 663
 664         switch (which) {
 665         case CONTENT:
 666         {
 667                 LOG_DEBUG_PLAYER ("Calling pass() on %1", earliest_content->content->path(0));
 668                 earliest_content->done = earliest_content->decoder->pass ();
 669                 shared_ptr<DCPContent> dcp = dynamic_pointer_cast<DCPContent>(earliest_content->content);
 670                 if (dcp && !_play_referenced && dcp->reference_audio()) {
 671                         /* We are skipping some referenced DCP audio content, so we need to update _last_audio_time
 672                            to `hide' the fact that no audio was emitted during the referenced DCP (though
 673                            we need to behave as though it was).
 674                         */
 675                         _last_audio_time = dcp->end (_film);
 676                 }
 677                 break;
 678         }
 679         case BLACK:
 680                 LOG_DEBUG_PLAYER ("Emit black for gap at %1", to_string(_black.position()));
 681                 emit_video (black_player_video_frame(EYES_BOTH), _black.position());
 682                 _black.set_position (_black.position() + one_video_frame());
 683                 break;
 684         case SILENT:
 685         {
 686                 LOG_DEBUG_PLAYER ("Emit silence for gap at %1", to_string(_silent.position()));
 687                 DCPTimePeriod period (_silent.period_at_position());
 688                 if (_last_audio_time) {
 689                         /* Sometimes the thing that happened last finishes fractionally before
 690                            or after this silence.  Bodge the start time of the silence to fix it.
 691                            I think this is nothing to worry about since we will just add or
 692                            remove a little silence at the end of some content.
 693                         */
 694                         int64_t const error = labs(period.from.get() - _last_audio_time->get());
 695                         /* Let's not worry about less than a frame at 24fps */
 696                         int64_t const too_much_error = DCPTime::from_frames(1, 24).get();
 697                         if (error >= too_much_error) {
 698                                 _film->log()->log(String::compose("Silence starting before or after last audio by %1", error), LogEntry::TYPE_ERROR);
 699                         }
 700                         DCPOMATIC_ASSERT (error < too_much_error);
 701                         period.from = *_last_audio_time;
 702                 }
 703                 if (period.duration() > one_video_frame()) {
 704                         period.to = period.from + one_video_frame();
 705                 }
 706                 fill_audio (period);
 707                 _silent.set_position (period.to);
 708                 break;
 709         }
 710         case NONE:
 711                 done = true;
 712                 break;
 713         }
 714
 715         /* Emit any audio that is ready */
 716
 717         /* Work out the time before which the audio is definitely all here.  This is the earliest last_push_end of one
 718            of our streams, or the position of the _silent.
 719         */
 720         DCPTime pull_to = _playback_length;
 721         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
 722                 i->update_pull_to (pull_to);
 723         }
 724         if (!_silent.done() && _silent.position() < pull_to) {
 725                 pull_to = _silent.position();
 726         }
 727
 728         LOG_DEBUG_PLAYER("Emitting audio up to %1", to_string(pull_to));
 729         list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_to);
 730         for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
 731                 if (_last_audio_time && i->second < *_last_audio_time) {
 732                         /* This new data comes before the last we emitted (or the last seek); discard it */
 733                         pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
 734                         if (!cut.first) {
 735                                 continue;
 736                         }
 737                         *i = cut;
 738                 } else if (_last_audio_time && i->second > *_last_audio_time) {
 739                         /* There's a gap between this data and the last we emitted; fill with silence */
 740                         fill_audio (DCPTimePeriod (*_last_audio_time, i->second));
 741                 }
 742
 743                 emit_audio (i->first, i->second);
 744         }
 745
 746         if (done) {
 747                 _shuffler->flush ();
 748                 for (list<pair<shared_ptr<PlayerVideo>, DCPTime> >::const_iterator i = _delay.begin(); i != _delay.end(); ++i) {
 749                         do_emit_video(i->first, i->second);
 750                 }
 751         }
 752
 753         return done;
 754 }
 755
 756 /** @return Open subtitles for the frame at the given time, converted to images */
 757 optional<PositionImage>
 758 Player::open_subtitles_for_frame (DCPTime time) const
 759 {
 760         list<PositionImage> captions;
 761         int const vfr = _film->video_frame_rate();
 762
 763         BOOST_FOREACH (
 764                 PlayerText j,
 765                 _active_texts[TEXT_OPEN_SUBTITLE].get_burnt(DCPTimePeriod(time, time + DCPTime::from_frames(1, vfr)), _always_burn_open_subtitles)
 766                 ) {
 767
 768                 /* Bitmap subtitles */
 769                 BOOST_FOREACH (BitmapText i, j.bitmap) {
 770                         if (!i.image) {
 771                                 continue;
 772                         }
 773
 774                         /* i.image will already have been scaled to fit _video_container_size */
 775                         dcp::Size scaled_size (i.rectangle.width * _video_container_size.width, i.rectangle.height * _video_container_size.height);
 776
 777                         captions.push_back (
 778                                 PositionImage (
 779                                         i.image,
 780                                         Position<int> (
 781                                                 lrint (_video_container_size.width * i.rectangle.x),
 782                                                 lrint (_video_container_size.height * i.rectangle.y)
 783                                                 )
 784                                         )
 785                                 );
 786                 }
 787
 788                 /* String subtitles (rendered to an image) */
 789                 if (!j.string.empty ()) {
 790                         list<PositionImage> s = render_text (j.string, j.fonts, _video_container_size, time, vfr);
 791                         copy (s.begin(), s.end(), back_inserter (captions));
 792                 }
 793         }
 794
 795         if (captions.empty ()) {
 796                 return optional<PositionImage> ();
 797         }
 798
 799         return merge (captions);
 800 }
 801
 802 void
 803 Player::video (weak_ptr<Piece> wp, ContentVideo video)
 804 {
 805         shared_ptr<Piece> piece = wp.lock ();
 806         if (!piece) {
 807                 return;
 808         }
 809
 810         if (!piece->content->video->use()) {
 811                 return;
 812         }
 813
 814         FrameRateChange frc (_film, piece->content);
 815         if (frc.skip && (video.frame % 2) == 1) {
 816                 return;
 817         }
 818
 819         /* Time of the first frame we will emit */
 820         DCPTime const time = content_video_to_dcp (piece, video.frame);
 821         LOG_DEBUG_PLAYER("Received video frame %1 at %2", video.frame, to_string(time));
 822
 823         /* Discard if it's before the content's period or the last accurate seek.  We can't discard
 824            if it's after the content's period here as in that case we still need to fill any gap between
 825            `now' and the end of the content's period.
 826         */
 827         if (time < piece->content->position() || (_last_video_time && time < *_last_video_time)) {
 828                 return;
 829         }
 830
 831         /* Fill gaps that we discover now that we have some video which needs to be emitted.
 832            This is where we need to fill to.
 833         */
 834         DCPTime fill_to = min (time, piece->content->end(_film));
 835
 836         if (_last_video_time) {
 837                 DCPTime fill_from = max (*_last_video_time, piece->content->position());
 838
 839                 /* Fill if we have more than half a frame to do */
 840                 if ((fill_to - fill_from) > one_video_frame() / 2) {
 841                         LastVideoMap::const_iterator last = _last_video.find (wp);
 842                         if (_film->three_d()) {
 843                                 Eyes fill_to_eyes = video.eyes;
 844                                 if (fill_to_eyes == EYES_BOTH) {
 845                                         fill_to_eyes = EYES_LEFT;
 846                                 }
 847                                 if (fill_to == piece->content->end(_film)) {
 848                                         /* Don't fill after the end of the content */
 849                                         fill_to_eyes = EYES_LEFT;
 850                                 }
 851                                 DCPTime j = fill_from;
 852                                 Eyes eyes = _last_video_eyes.get_value_or(EYES_LEFT);
 853                                 if (eyes == EYES_BOTH) {
 854                                         eyes = EYES_LEFT;
 855                                 }
 856                                 while (j < fill_to || eyes != fill_to_eyes) {
 857                                         if (last != _last_video.end()) {
 858                                                 LOG_DEBUG_PLAYER("Fill using last video at %1 in 3D mode", to_string(j));
 859                                                 shared_ptr<PlayerVideo> copy = last->second->shallow_copy();
 860                                                 copy->set_eyes (eyes);
 861                                                 emit_video (copy, j);
 862                                         } else {
 863                                                 LOG_DEBUG_PLAYER("Fill using black at %1 in 3D mode", to_string(j));
 864                                                 emit_video (black_player_video_frame(eyes), j);
 865                                         }
 866                                         if (eyes == EYES_RIGHT) {
 867                                                 j += one_video_frame();
 868                                         }
 869                                         eyes = increment_eyes (eyes);
 870                                 }
 871                         } else {
 872                                 for (DCPTime j = fill_from; j < fill_to; j += one_video_frame()) {
 873                                         if (last != _last_video.end()) {
 874                                                 emit_video (last->second, j);
 875                                         } else {
 876                                                 emit_video (black_player_video_frame(EYES_BOTH), j);
 877                                         }
 878                                 }
 879                         }
 880                 }
 881         }
 882
 883         _last_video[wp].reset (
 884                 new PlayerVideo (
 885                         video.image,
 886                         piece->content->video->crop (),
 887                         piece->content->video->fade (_film, video.frame),
 888                         scale_for_display(piece->content->video->scaled_size(_film->frame_size()), _video_container_size, _film->frame_size()),
 889                         _video_container_size,
 890                         video.eyes,
 891                         video.part,
 892                         piece->content->video->colour_conversion(),
 893                         piece->content->video->range(),
 894                         piece->content,
 895                         video.frame,
 896                         false
 897                         )
 898                 );
 899
 900         DCPTime t = time;
 901         for (int i = 0; i < frc.repeat; ++i) {
 902                 if (t < piece->content->end(_film)) {
 903                         emit_video (_last_video[wp], t);
 904                 }
 905                 t += one_video_frame ();
 906         }
 907 }
 908
 909 void
 910 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
 911 {
 912         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
 913
 914         shared_ptr<Piece> piece = wp.lock ();
 915         if (!piece) {
 916                 return;
 917         }
 918
 919         shared_ptr<AudioContent> content = piece->content->audio;
 920         DCPOMATIC_ASSERT (content);
 921
 922         int const rfr = content->resampled_frame_rate (_film);
 923
 924         /* Compute time in the DCP */
 925         DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame);
 926         LOG_DEBUG_PLAYER("Received audio frame %1 at %2", content_audio.frame, to_string(time));
 927
 928         /* And the end of this block in the DCP */
 929         DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), rfr);
 930
 931         /* Remove anything that comes before the start or after the end of the content */
 932         if (time < piece->content->position()) {
 933                 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
 934                 if (!cut.first) {
 935                         /* This audio is entirely discarded */
 936                         return;
 937                 }
 938                 content_audio.audio = cut.first;
 939                 time = cut.second;
 940         } else if (time > piece->content->end(_film)) {
 941                 /* Discard it all */
 942                 return;
 943         } else if (end > piece->content->end(_film)) {
 944                 Frame const remaining_frames = DCPTime(piece->content->end(_film) - time).frames_round(rfr);
 945                 if (remaining_frames == 0) {
 946                         return;
 947                 }
 948                 content_audio.audio.reset (new AudioBuffers(content_audio.audio, remaining_frames, 0));
 949         }
 950
 951         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
 952
 953         /* Gain */
 954
 955         if (content->gain() != 0) {
 956                 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
 957                 gain->apply_gain (content->gain ());
 958                 content_audio.audio = gain;
 959         }
 960
 961         /* Remap */
 962
 963         content_audio.audio = remap (content_audio.audio, _film->audio_channels(), stream->mapping());
 964
 965         /* Process */
 966
 967         if (_audio_processor) {
 968                 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
 969         }
 970
 971         /* Push */
 972
 973         _audio_merger.push (content_audio.audio, time);
 974         /* XXX: this almost certainly needs to be more efficient; perhaps pieces fill a map to find
 975          * the piece from the stream, then we can call the right piece with no loop.
 976          */
 977         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
 978                 i->set_last_push_end (stream, time + DCPTime::from_frames(content_audio.audio->frames(), _film->audio_frame_rate()));
 979         }
 980 }
 981
 982 void
 983 Player::bitmap_text_start (weak_ptr<Piece> wp, weak_ptr<const TextContent> wc, ContentBitmapText subtitle)
 984 {
 985         shared_ptr<Piece> piece = wp.lock ();
 986         shared_ptr<const TextContent> text = wc.lock ();
 987         if (!piece || !text) {
 988                 return;
 989         }
 990
 991         /* Apply content's subtitle offsets */
 992         subtitle.sub.rectangle.x += text->x_offset ();
 993         subtitle.sub.rectangle.y += text->y_offset ();
 994
 995         /* Apply a corrective translation to keep the subtitle centred after the scale that is coming up */
 996         subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * ((text->x_scale() - 1) / 2);
 997         subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * ((text->y_scale() - 1) / 2);
 998
 999         /* Apply content's subtitle scale */
1000         subtitle.sub.rectangle.width *= text->x_scale ();
1001         subtitle.sub.rectangle.height *= text->y_scale ();
1002
1003         PlayerText ps;
1004         shared_ptr<Image> image = subtitle.sub.image;
1005
1006         /* We will scale the subtitle up to fit _video_container_size */
1007         int const width = subtitle.sub.rectangle.width * _video_container_size.width;
1008         int const height = subtitle.sub.rectangle.height * _video_container_size.height;
1009         if (width == 0 || height == 0) {
1010                 return;
1011         }
1012
1013         dcp::Size scaled_size (width, height);
1014         ps.bitmap.push_back (BitmapText(image->scale(scaled_size, dcp::YUV_TO_RGB_REC601, image->pixel_format(), true, _fast), subtitle.sub.rectangle));
1015         DCPTime from (content_time_to_dcp (piece, subtitle.from()));
1016
1017         _active_texts[text->type()].add_from (wc, ps, from);
1018 }
1019
1020 void
1021 Player::plain_text_start (weak_ptr<Piece> wp, weak_ptr<const TextContent> wc, ContentStringText subtitle)
1022 {
1023         shared_ptr<Piece> piece = wp.lock ();
1024         shared_ptr<const TextContent> text = wc.lock ();
1025         if (!piece || !text) {
1026                 return;
1027         }
1028
1029         PlayerText ps;
1030         DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
1031
1032         if (from > piece->content->end(_film)) {
1033                 return;
1034         }
1035
1036         BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
1037                 s.set_h_position (s.h_position() + text->x_offset ());
1038                 s.set_v_position (s.v_position() + text->y_offset ());
1039                 float const xs = text->x_scale();
1040                 float const ys = text->y_scale();
1041                 float size = s.size();
1042
1043                 /* Adjust size to express the common part of the scaling;
1044                    e.g. if xs = ys = 0.5 we scale size by 2.
1045                 */
1046                 if (xs > 1e-5 && ys > 1e-5) {
1047                         size *= 1 / min (1 / xs, 1 / ys);
1048                 }
1049                 s.set_size (size);
1050
1051                 /* Then express aspect ratio changes */
1052                 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
1053                         s.set_aspect_adjust (xs / ys);
1054                 }
1055
1056                 s.set_in (dcp::Time(from.seconds(), 1000));
1057                 ps.string.push_back (StringText (s, text->outline_width()));
1058                 ps.add_fonts (text->fonts ());
1059         }
1060
1061         _active_texts[text->type()].add_from (wc, ps, from);
1062 }
1063
1064 void
1065 Player::subtitle_stop (weak_ptr<Piece> wp, weak_ptr<const TextContent> wc, ContentTime to)
1066 {
1067         shared_ptr<const TextContent> text = wc.lock ();
1068         if (!text) {
1069                 return;
1070         }
1071
1072         if (!_active_texts[text->type()].have(wc)) {
1073                 return;
1074         }
1075
1076         shared_ptr<Piece> piece = wp.lock ();
1077         if (!piece) {
1078                 return;
1079         }
1080
1081         DCPTime const dcp_to = content_time_to_dcp (piece, to);
1082
1083         if (dcp_to > piece->content->end(_film)) {
1084                 return;
1085         }
1086
1087         pair<PlayerText, DCPTime> from = _active_texts[text->type()].add_to (wc, dcp_to);
1088
1089         bool const always = (text->type() == TEXT_OPEN_SUBTITLE && _always_burn_open_subtitles);
1090         if (text->use() && !always && !text->burn()) {
1091                 Text (from.first, text->type(), text->dcp_track().get_value_or(DCPTextTrack()), DCPTimePeriod (from.second, dcp_to));
1092         }
1093 }
1094
1095 void
1096 Player::seek (DCPTime time, bool accurate)
1097 {
1098         boost::mutex::scoped_lock lm (_mutex);
1099         LOG_DEBUG_PLAYER("Seek to %1 (%2accurate)", to_string(time), accurate ? "" : "in");
1100
1101         if (_suspended) {
1102                 /* We can't seek in this state */
1103                 return;
1104         }
1105
1106         if (_shuffler) {
1107                 _shuffler->clear ();
1108         }
1109
1110         _delay.clear ();
1111
1112         if (_audio_processor) {
1113                 _audio_processor->flush ();
1114         }
1115
1116         _audio_merger.clear ();
1117         for (int i = 0; i < TEXT_COUNT; ++i) {
1118                 _active_texts[i].clear ();
1119         }
1120
1121         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
1122                 if (time < i->content->position()) {
1123                         /* Before; seek to the start of the content.  Even if this request is for an inaccurate seek
1124                            we must seek this (following) content accurately, otherwise when we come to the end of the current
1125                            content we may not start right at the beginning of the next, causing a gap (if the next content has
1126                            been trimmed to a point between keyframes, or something).
1127                         */
1128                         i->decoder->seek (dcp_to_content_time (i, i->content->position()), true);
1129                         i->done = false;
1130                 } else if (i->content->position() <= time && time < i->content->end(_film)) {
1131                         /* During; seek to position */
1132                         i->decoder->seek (dcp_to_content_time (i, time), accurate);
1133                         i->done = false;
1134                 } else {
1135                         /* After; this piece is done */
1136                         i->done = true;
1137                 }
1138         }
1139
1140         if (accurate) {
1141                 _last_video_time = time;
1142                 _last_video_eyes = EYES_LEFT;
1143                 _last_audio_time = time;
1144         } else {
1145                 _last_video_time = optional<DCPTime>();
1146                 _last_video_eyes = optional<Eyes>();
1147                 _last_audio_time = optional<DCPTime>();
1148         }
1149
1150         _black.set_position (time);
1151         _silent.set_position (time);
1152
1153         _last_video.clear ();
1154 }
1155
1156 void
1157 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1158 {
1159         /* We need a delay to give a little wiggle room to ensure that relevent subtitles arrive at the
1160            player before the video that requires them.
1161         */
1162         _delay.push_back (make_pair (pv, time));
1163
1164         if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
1165                 _last_video_time = time + one_video_frame();
1166         }
1167         _last_video_eyes = increment_eyes (pv->eyes());
1168
1169         if (_delay.size() < 3) {
1170                 return;
1171         }
1172
1173         pair<shared_ptr<PlayerVideo>, DCPTime> to_do = _delay.front();
1174         _delay.pop_front();
1175         do_emit_video (to_do.first, to_do.second);
1176 }
1177
1178 void
1179 Player::do_emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
1180 {
1181         if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
1182                 for (int i = 0; i < TEXT_COUNT; ++i) {
1183                         _active_texts[i].clear_before (time);
1184                 }
1185         }
1186
1187         optional<PositionImage> subtitles = open_subtitles_for_frame (time);
1188         if (subtitles) {
1189                 pv->set_text (subtitles.get ());
1190         }
1191
1192         Video (pv, time);
1193 }
1194
1195 void
1196 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
1197 {
1198         /* Log if the assert below is about to fail */
1199         if (_last_audio_time && labs(time.get() - _last_audio_time->get()) > 1) {
1200                 _film->log()->log(String::compose("Out-of-sequence emit %1 vs %2", to_string(time), to_string(*_last_audio_time)), LogEntry::TYPE_WARNING);
1201         }
1202
1203         /* This audio must follow on from the previous, allowing for half a sample (at 48kHz) leeway */
1204         DCPOMATIC_ASSERT (!_last_audio_time || labs(time.get() - _last_audio_time->get()) < 2);
1205         Audio (data, time, _film->audio_frame_rate());
1206         _last_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate());
1207 }
1208
1209 void
1210 Player::fill_audio (DCPTimePeriod period)
1211 {
1212         if (period.from == period.to) {
1213                 return;
1214         }
1215
1216         DCPOMATIC_ASSERT (period.from < period.to);
1217
1218         DCPTime t = period.from;
1219         while (t < period.to) {
1220                 DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
1221                 Frame const samples = block.frames_round(_film->audio_frame_rate());
1222                 if (samples) {
1223                         shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
1224                         silence->make_silent ();
1225                         emit_audio (silence, t);
1226                 }
1227                 t += block;
1228         }
1229 }
1230
1231 DCPTime
1232 Player::one_video_frame () const
1233 {
1234         return DCPTime::from_frames (1, _film->video_frame_rate ());
1235 }
1236
1237 pair<shared_ptr<AudioBuffers>, DCPTime>
1238 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1239 {
1240         DCPTime const discard_time = discard_to - time;
1241         Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1242         Frame remaining_frames = audio->frames() - discard_frames;
1243         if (remaining_frames <= 0) {
1244                 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1245         }
1246         shared_ptr<AudioBuffers> cut (new AudioBuffers(audio, remaining_frames, discard_frames));
1247         return make_pair(cut, time + discard_time);
1248 }
1249
1250 void
1251 Player::set_dcp_decode_reduction (optional<int> reduction)
1252 {
1253         Change (CHANGE_TYPE_PENDING, PlayerProperty::DCP_DECODE_REDUCTION, false);
1254
1255         {
1256                 boost::mutex::scoped_lock lm (_mutex);
1257
1258                 if (reduction == _dcp_decode_reduction) {
1259                         lm.unlock ();
1260                         Change (CHANGE_TYPE_CANCELLED, PlayerProperty::DCP_DECODE_REDUCTION, false);
1261                         return;
1262                 }
1263
1264                 _dcp_decode_reduction = reduction;
1265                 setup_pieces_unlocked ();
1266         }
1267
1268         Change (CHANGE_TYPE_DONE, PlayerProperty::DCP_DECODE_REDUCTION, false);
1269 }
1270
1271 optional<DCPTime>
1272 Player::content_time_to_dcp (shared_ptr<Content> content, ContentTime t)
1273 {
1274         boost::mutex::scoped_lock lm (_mutex);
1275
1276         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
1277                 if (i->content == content) {
1278                         return content_time_to_dcp (i, t);
1279                 }
1280         }
1281
1282         /* We couldn't find this content; perhaps things are being changed over */
1283         return optional<DCPTime>();
1284 }
1285
1286
1287 shared_ptr<const Playlist>
1288 Player::playlist () const
1289 {
1290         return _playlist ? _playlist : _film->playlist();
1291 }
1292
1293
1294 void
1295 Player::atmos (weak_ptr<Piece>, ContentAtmos data)
1296 {
1297         Atmos (data.data, DCPTime::from_frames(data.frame, _film->video_frame_rate()), data.metadata);
1298 }
1299