src/lib/player.cc

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