src/lib/player.cc

   1 /*
   2     Copyright (C) 2013-2017 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 "player.h"
  22 #include "film.h"
  23 #include "audio_buffers.h"
  24 #include "content_audio.h"
  25 #include "dcp_content.h"
  26 #include "job.h"
  27 #include "image.h"
  28 #include "raw_image_proxy.h"
  29 #include "ratio.h"
  30 #include "log.h"
  31 #include "render_subtitles.h"
  32 #include "config.h"
  33 #include "content_video.h"
  34 #include "player_video.h"
  35 #include "frame_rate_change.h"
  36 #include "audio_processor.h"
  37 #include "playlist.h"
  38 #include "referenced_reel_asset.h"
  39 #include "decoder_factory.h"
  40 #include "decoder.h"
  41 #include "video_decoder.h"
  42 #include "audio_decoder.h"
  43 #include "subtitle_content.h"
  44 #include "subtitle_decoder.h"
  45 #include "ffmpeg_content.h"
  46 #include "audio_content.h"
  47 #include "content_subtitle.h"
  48 #include "dcp_decoder.h"
  49 #include "image_decoder.h"
  50 #include "resampler.h"
  51 #include "compose.hpp"
  52 #include <dcp/reel.h>
  53 #include <dcp/reel_sound_asset.h>
  54 #include <dcp/reel_subtitle_asset.h>
  55 #include <dcp/reel_picture_asset.h>
  56 #include <boost/foreach.hpp>
  57 #include <stdint.h>
  58 #include <algorithm>
  59 #include <iostream>
  60
  61 #include "i18n.h"
  62
  63 #define LOG_GENERAL(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
  64
  65 using std::list;
  66 using std::cout;
  67 using std::min;
  68 using std::max;
  69 using std::min;
  70 using std::vector;
  71 using std::pair;
  72 using std::map;
  73 using std::make_pair;
  74 using std::copy;
  75 using boost::shared_ptr;
  76 using boost::weak_ptr;
  77 using boost::dynamic_pointer_cast;
  78 using boost::optional;
  79 using boost::scoped_ptr;
  80
  81 Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist)
  82         : _film (film)
  83         , _playlist (playlist)
  84         , _have_valid_pieces (false)
  85         , _ignore_video (false)
  86         , _ignore_audio (false)
  87         , _always_burn_subtitles (false)
  88         , _fast (false)
  89         , _play_referenced (false)
  90         , _last_seek_accurate (true)
  91         , _audio_merger (_film->audio_frame_rate())
  92 {
  93         _film_changed_connection = _film->Changed.connect (bind (&Player::film_changed, this, _1));
  94         _playlist_changed_connection = _playlist->Changed.connect (bind (&Player::playlist_changed, this));
  95         _playlist_content_changed_connection = _playlist->ContentChanged.connect (bind (&Player::playlist_content_changed, this, _1, _2, _3));
  96         set_video_container_size (_film->frame_size ());
  97
  98         film_changed (Film::AUDIO_PROCESSOR);
  99
 100         seek (DCPTime (), true);
 101 }
 102
 103 void
 104 Player::setup_pieces ()
 105 {
 106         _pieces.clear ();
 107
 108         BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
 109
 110                 if (!i->paths_valid ()) {
 111                         continue;
 112                 }
 113
 114                 shared_ptr<Decoder> decoder = decoder_factory (i, _film->log());
 115                 FrameRateChange frc (i->active_video_frame_rate(), _film->video_frame_rate());
 116
 117                 if (!decoder) {
 118                         /* Not something that we can decode; e.g. Atmos content */
 119                         continue;
 120                 }
 121
 122                 if (decoder->video && _ignore_video) {
 123                         decoder->video->set_ignore ();
 124                 }
 125
 126                 if (decoder->audio && _ignore_audio) {
 127                         decoder->audio->set_ignore ();
 128                 }
 129
 130                 shared_ptr<DCPDecoder> dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
 131                 if (dcp && _play_referenced) {
 132                         dcp->set_decode_referenced ();
 133                 }
 134
 135                 shared_ptr<Piece> piece (new Piece (i, decoder, frc));
 136                 _pieces.push_back (piece);
 137
 138                 if (decoder->video) {
 139                         decoder->video->Data.connect (bind (&Player::video, this, weak_ptr<Piece> (piece), _1));
 140                 }
 141
 142                 if (decoder->audio) {
 143                         decoder->audio->Data.connect (bind (&Player::audio, this, weak_ptr<Piece> (piece), _1, _2));
 144                 }
 145
 146                 if (decoder->subtitle) {
 147                         decoder->subtitle->ImageStart.connect (bind (&Player::image_subtitle_start, this, weak_ptr<Piece> (piece), _1));
 148                         decoder->subtitle->TextStart.connect (bind (&Player::text_subtitle_start, this, weak_ptr<Piece> (piece), _1));
 149                         decoder->subtitle->Stop.connect (bind (&Player::subtitle_stop, this, weak_ptr<Piece> (piece), _1));
 150                 }
 151         }
 152
 153         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
 154                 if (i->content->audio) {
 155                         BOOST_FOREACH (AudioStreamPtr j, i->content->audio->streams()) {
 156                                 _stream_states[j] = StreamState (i, i->content->position ());
 157                         }
 158                 }
 159         }
 160
 161         if (!_play_referenced) {
 162                 BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
 163                         shared_ptr<DCPContent> dc = dynamic_pointer_cast<DCPContent> (i->content);
 164                         if (dc) {
 165                                 if (dc->reference_video()) {
 166                                         _no_video.push_back (DCPTimePeriod (dc->position(), dc->end()));
 167                                 }
 168                                 if (dc->reference_audio()) {
 169                                         _no_audio.push_back (DCPTimePeriod (dc->position(), dc->end()));
 170                                 }
 171                         }
 172                 }
 173         }
 174
 175         _last_video_time = optional<DCPTime> ();
 176         _last_audio_time = optional<DCPTime> ();
 177         _have_valid_pieces = true;
 178 }
 179
 180 void
 181 Player::playlist_content_changed (weak_ptr<Content> w, int property, bool frequent)
 182 {
 183         shared_ptr<Content> c = w.lock ();
 184         if (!c) {
 185                 return;
 186         }
 187
 188         if (
 189                 property == ContentProperty::POSITION ||
 190                 property == ContentProperty::LENGTH ||
 191                 property == ContentProperty::TRIM_START ||
 192                 property == ContentProperty::TRIM_END ||
 193                 property == ContentProperty::PATH ||
 194                 property == VideoContentProperty::FRAME_TYPE ||
 195                 property == DCPContentProperty::NEEDS_ASSETS ||
 196                 property == DCPContentProperty::NEEDS_KDM ||
 197                 property == SubtitleContentProperty::COLOUR ||
 198                 property == SubtitleContentProperty::OUTLINE ||
 199                 property == SubtitleContentProperty::SHADOW ||
 200                 property == SubtitleContentProperty::EFFECT_COLOUR ||
 201                 property == FFmpegContentProperty::SUBTITLE_STREAM ||
 202                 property == VideoContentProperty::COLOUR_CONVERSION
 203                 ) {
 204
 205                 _have_valid_pieces = false;
 206                 Changed (frequent);
 207
 208         } else if (
 209                 property == SubtitleContentProperty::LINE_SPACING ||
 210                 property == SubtitleContentProperty::OUTLINE_WIDTH ||
 211                 property == SubtitleContentProperty::Y_SCALE ||
 212                 property == SubtitleContentProperty::FADE_IN ||
 213                 property == SubtitleContentProperty::FADE_OUT ||
 214                 property == ContentProperty::VIDEO_FRAME_RATE ||
 215                 property == SubtitleContentProperty::USE ||
 216                 property == SubtitleContentProperty::X_OFFSET ||
 217                 property == SubtitleContentProperty::Y_OFFSET ||
 218                 property == SubtitleContentProperty::X_SCALE ||
 219                 property == SubtitleContentProperty::FONTS ||
 220                 property == VideoContentProperty::CROP ||
 221                 property == VideoContentProperty::SCALE ||
 222                 property == VideoContentProperty::FADE_IN ||
 223                 property == VideoContentProperty::FADE_OUT
 224                 ) {
 225
 226                 Changed (frequent);
 227         }
 228 }
 229
 230 void
 231 Player::set_video_container_size (dcp::Size s)
 232 {
 233         if (s == _video_container_size) {
 234                 return;
 235         }
 236
 237         _video_container_size = s;
 238
 239         _black_image.reset (new Image (AV_PIX_FMT_RGB24, _video_container_size, true));
 240         _black_image->make_black ();
 241
 242         Changed (false);
 243 }
 244
 245 void
 246 Player::playlist_changed ()
 247 {
 248         _have_valid_pieces = false;
 249         Changed (false);
 250 }
 251
 252 void
 253 Player::film_changed (Film::Property p)
 254 {
 255         /* Here we should notice Film properties that affect our output, and
 256            alert listeners that our output now would be different to how it was
 257            last time we were run.
 258         */
 259
 260         if (p == Film::CONTAINER) {
 261                 Changed (false);
 262         } else if (p == Film::VIDEO_FRAME_RATE) {
 263                 /* Pieces contain a FrameRateChange which contains the DCP frame rate,
 264                    so we need new pieces here.
 265                 */
 266                 _have_valid_pieces = false;
 267                 Changed (false);
 268         } else if (p == Film::AUDIO_PROCESSOR) {
 269                 if (_film->audio_processor ()) {
 270                         _audio_processor = _film->audio_processor()->clone (_film->audio_frame_rate ());
 271                 }
 272         }
 273 }
 274
 275 list<PositionImage>
 276 Player::transform_image_subtitles (list<ImageSubtitle> subs) const
 277 {
 278         list<PositionImage> all;
 279
 280         for (list<ImageSubtitle>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
 281                 if (!i->image) {
 282                         continue;
 283                 }
 284
 285                 /* We will scale the subtitle up to fit _video_container_size */
 286                 dcp::Size scaled_size (i->rectangle.width * _video_container_size.width, i->rectangle.height * _video_container_size.height);
 287
 288                 /* Then we need a corrective translation, consisting of two parts:
 289                  *
 290                  * 1.  that which is the result of the scaling of the subtitle by _video_container_size; this will be
 291                  *     rect.x * _video_container_size.width and rect.y * _video_container_size.height.
 292                  *
 293                  * 2.  that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
 294                  *     (width_before_subtitle_scale * (1 - subtitle_x_scale) / 2) and
 295                  *     (height_before_subtitle_scale * (1 - subtitle_y_scale) / 2).
 296                  *
 297                  * Combining these two translations gives these expressions.
 298                  */
 299
 300                 all.push_back (
 301                         PositionImage (
 302                                 i->image->scale (
 303                                         scaled_size,
 304                                         dcp::YUV_TO_RGB_REC601,
 305                                         i->image->pixel_format (),
 306                                         true,
 307                                         _fast
 308                                         ),
 309                                 Position<int> (
 310                                         lrint (_video_container_size.width * i->rectangle.x),
 311                                         lrint (_video_container_size.height * i->rectangle.y)
 312                                         )
 313                                 )
 314                         );
 315         }
 316
 317         return all;
 318 }
 319
 320 shared_ptr<PlayerVideo>
 321 Player::black_player_video_frame () const
 322 {
 323         return shared_ptr<PlayerVideo> (
 324                 new PlayerVideo (
 325                         shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
 326                         Crop (),
 327                         optional<double> (),
 328                         _video_container_size,
 329                         _video_container_size,
 330                         EYES_BOTH,
 331                         PART_WHOLE,
 332                         PresetColourConversion::all().front().conversion
 333                 )
 334         );
 335 }
 336
 337 Frame
 338 Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
 339 {
 340         DCPTime s = t - piece->content->position ();
 341         s = min (piece->content->length_after_trim(), s);
 342         s = max (DCPTime(), s + DCPTime (piece->content->trim_start(), piece->frc));
 343
 344         /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
 345            then convert that ContentTime to frames at the content's rate.  However this fails for
 346            situations like content at 29.9978733fps, DCP at 30fps.  The accuracy of the Time type is not
 347            enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
 348
 349            Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
 350         */
 351         return s.frames_floor (piece->frc.dcp) / piece->frc.factor ();
 352 }
 353
 354 DCPTime
 355 Player::content_video_to_dcp (shared_ptr<const Piece> piece, Frame f) const
 356 {
 357         /* See comment in dcp_to_content_video */
 358         DCPTime const d = DCPTime::from_frames (f * piece->frc.factor(), piece->frc.dcp) - DCPTime (piece->content->trim_start (), piece->frc);
 359         return max (DCPTime (), d + piece->content->position ());
 360 }
 361
 362 Frame
 363 Player::dcp_to_resampled_audio (shared_ptr<const Piece> piece, DCPTime t) const
 364 {
 365         DCPTime s = t - piece->content->position ();
 366         s = min (piece->content->length_after_trim(), s);
 367         /* See notes in dcp_to_content_video */
 368         return max (DCPTime (), DCPTime (piece->content->trim_start (), piece->frc) + s).frames_floor (_film->audio_frame_rate ());
 369 }
 370
 371 DCPTime
 372 Player::resampled_audio_to_dcp (shared_ptr<const Piece> piece, Frame f) const
 373 {
 374         /* See comment in dcp_to_content_video */
 375         DCPTime const d = DCPTime::from_frames (f, _film->audio_frame_rate()) - DCPTime (piece->content->trim_start(), piece->frc);
 376         return max (DCPTime (), d + piece->content->position ());
 377 }
 378
 379 ContentTime
 380 Player::dcp_to_content_time (shared_ptr<const Piece> piece, DCPTime t) const
 381 {
 382         DCPTime s = t - piece->content->position ();
 383         s = min (piece->content->length_after_trim(), s);
 384         return max (ContentTime (), ContentTime (s, piece->frc) + piece->content->trim_start());
 385 }
 386
 387 DCPTime
 388 Player::content_time_to_dcp (shared_ptr<const Piece> piece, ContentTime t) const
 389 {
 390         return max (DCPTime (), DCPTime (t - piece->content->trim_start(), piece->frc) + piece->content->position());
 391 }
 392
 393 list<shared_ptr<Font> >
 394 Player::get_subtitle_fonts ()
 395 {
 396         if (!_have_valid_pieces) {
 397                 setup_pieces ();
 398         }
 399
 400         list<shared_ptr<Font> > fonts;
 401         BOOST_FOREACH (shared_ptr<Piece>& p, _pieces) {
 402                 if (p->content->subtitle) {
 403                         /* XXX: things may go wrong if there are duplicate font IDs
 404                            with different font files.
 405                         */
 406                         list<shared_ptr<Font> > f = p->content->subtitle->fonts ();
 407                         copy (f.begin(), f.end(), back_inserter (fonts));
 408                 }
 409         }
 410
 411         return fonts;
 412 }
 413
 414 /** Set this player never to produce any video data */
 415 void
 416 Player::set_ignore_video ()
 417 {
 418         _ignore_video = true;
 419 }
 420
 421 /** Set whether or not this player should always burn text subtitles into the image,
 422  *  regardless of the content settings.
 423  *  @param burn true to always burn subtitles, false to obey content settings.
 424  */
 425 void
 426 Player::set_always_burn_subtitles (bool burn)
 427 {
 428         _always_burn_subtitles = burn;
 429 }
 430
 431 void
 432 Player::set_fast ()
 433 {
 434         _fast = true;
 435         _have_valid_pieces = false;
 436 }
 437
 438 void
 439 Player::set_play_referenced ()
 440 {
 441         _play_referenced = true;
 442         _have_valid_pieces = false;
 443 }
 444
 445 list<ReferencedReelAsset>
 446 Player::get_reel_assets ()
 447 {
 448         list<ReferencedReelAsset> a;
 449
 450         BOOST_FOREACH (shared_ptr<Content> i, _playlist->content ()) {
 451                 shared_ptr<DCPContent> j = dynamic_pointer_cast<DCPContent> (i);
 452                 if (!j) {
 453                         continue;
 454                 }
 455
 456                 scoped_ptr<DCPDecoder> decoder;
 457                 try {
 458                         decoder.reset (new DCPDecoder (j, _film->log()));
 459                 } catch (...) {
 460                         return a;
 461                 }
 462
 463                 int64_t offset = 0;
 464                 BOOST_FOREACH (shared_ptr<dcp::Reel> k, decoder->reels()) {
 465
 466                         DCPOMATIC_ASSERT (j->video_frame_rate ());
 467                         double const cfr = j->video_frame_rate().get();
 468                         Frame const trim_start = j->trim_start().frames_round (cfr);
 469                         Frame const trim_end = j->trim_end().frames_round (cfr);
 470                         int const ffr = _film->video_frame_rate ();
 471
 472                         DCPTime const from = i->position() + DCPTime::from_frames (offset, _film->video_frame_rate());
 473                         if (j->reference_video ()) {
 474                                 shared_ptr<dcp::ReelAsset> ra = k->main_picture ();
 475                                 DCPOMATIC_ASSERT (ra);
 476                                 ra->set_entry_point (ra->entry_point() + trim_start);
 477                                 ra->set_duration (ra->duration() - trim_start - trim_end);
 478                                 a.push_back (
 479                                         ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
 480                                         );
 481                         }
 482
 483                         if (j->reference_audio ()) {
 484                                 shared_ptr<dcp::ReelAsset> ra = k->main_sound ();
 485                                 DCPOMATIC_ASSERT (ra);
 486                                 ra->set_entry_point (ra->entry_point() + trim_start);
 487                                 ra->set_duration (ra->duration() - trim_start - trim_end);
 488                                 a.push_back (
 489                                         ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
 490                                         );
 491                         }
 492
 493                         if (j->reference_subtitle ()) {
 494                                 shared_ptr<dcp::ReelAsset> ra = k->main_subtitle ();
 495                                 DCPOMATIC_ASSERT (ra);
 496                                 ra->set_entry_point (ra->entry_point() + trim_start);
 497                                 ra->set_duration (ra->duration() - trim_start - trim_end);
 498                                 a.push_back (
 499                                         ReferencedReelAsset (ra, DCPTimePeriod (from, from + DCPTime::from_frames (ra->duration(), ffr)))
 500                                         );
 501                         }
 502
 503                         /* Assume that main picture duration is the length of the reel */
 504                         offset += k->main_picture()->duration ();
 505                 }
 506         }
 507
 508         return a;
 509 }
 510
 511 bool
 512 Player::pass ()
 513 {
 514         if (!_have_valid_pieces) {
 515                 setup_pieces ();
 516         }
 517
 518         shared_ptr<Piece> earliest;
 519         DCPTime earliest_content;
 520
 521         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
 522                 if (!i->done) {
 523                         DCPTime const t = i->content->position() + DCPTime (i->decoder->position(), i->frc);
 524                         if (!earliest || t < earliest_content) {
 525                                 earliest_content = t;
 526                                 earliest = i;
 527                         }
 528                 }
 529         }
 530
 531         if (earliest) {
 532                 earliest->done = earliest->decoder->pass ();
 533                 if (earliest->done && earliest->content->audio) {
 534                         /* Flush the Player audio system for this piece */
 535                         BOOST_FOREACH (AudioStreamPtr i, earliest->content->audio->streams()) {
 536                                 audio_flush (earliest, i);
 537                         }
 538                 }
 539         }
 540
 541         /* Fill towards the next thing that might happen (or the end of the playlist).  This is to fill gaps between content,
 542            NOT to fill gaps within content (the latter is done in ::video())
 543         */
 544         DCPTime fill_towards = earliest ? earliest_content : _playlist->length();
 545
 546         /* Work out where to fill video from */
 547         optional<DCPTime> video_fill_from;
 548         if (_last_video_time && !_playlist->video_content_at(_last_video_time.get())) {
 549                 /* No seek; fill towards the next thing that might happen (or the end of the playlist) */
 550                 video_fill_from = _last_video_time;
 551         } else if (_last_seek_time && !_playlist->video_content_at(_last_seek_time.get())) {
 552                 /* Seek into an empty area; fill from the seek time */
 553                 video_fill_from = _last_seek_time;
 554         }
 555
 556         bool filled = false;
 557
 558         if (video_fill_from && ((fill_towards - video_fill_from.get())) > one_video_frame()) {
 559                 emit_video (black_player_video_frame(), video_fill_from.get());
 560                 filled = true;
 561         } else if (_playlist->length() == DCPTime()) {
 562                 /* Special case of an empty Film; just give one black frame */
 563                 emit_video (black_player_video_frame(), DCPTime());
 564                 filled = true;
 565         }
 566
 567         optional<DCPTime> audio_fill_from;
 568         if (_last_audio_time && !_playlist->audio_content_at(_last_audio_time.get())) {
 569                 /* No seek; fill from the last thing that happened */
 570                 audio_fill_from = _last_audio_time;
 571         } else if (_last_seek_time && !_playlist->audio_content_at(_last_seek_time.get())) {
 572                 /* Seek into an empty area; fill from the seek time */
 573                 audio_fill_from = _last_seek_time;
 574         }
 575
 576         if (audio_fill_from && audio_fill_from < fill_towards) {
 577                 DCPTimePeriod period (audio_fill_from.get(), fill_towards);
 578                 if (period.duration() > one_video_frame()) {
 579                         period.to = period.from + one_video_frame();
 580                 }
 581                 fill_audio (period);
 582                 filled = true;
 583         }
 584
 585         if (!earliest && !filled) {
 586                 return true;
 587         }
 588
 589         /* Emit any audio that is ready */
 590
 591         DCPTime pull_from = _playlist->length ();
 592         for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
 593                 if (!i->second.piece->done && i->second.last_push_end < pull_from) {
 594                         pull_from = i->second.last_push_end;
 595                 }
 596         }
 597
 598         list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_from);
 599         for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
 600                 if (_last_audio_time && i->second < _last_audio_time.get()) {
 601                         /* There has been an accurate seek and we have received some audio before the seek time;
 602                            discard it.
 603                         */
 604                         pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (i->first, i->second, *_last_audio_time);
 605                         if (!cut.first) {
 606                                 continue;
 607                         }
 608                         *i = cut;
 609                 }
 610
 611                 if (_last_audio_time) {
 612                         fill_audio (DCPTimePeriod (_last_audio_time.get(), i->second));
 613                 }
 614
 615                 emit_audio (i->first, i->second);
 616         }
 617
 618         return false;
 619 }
 620
 621 optional<PositionImage>
 622 Player::subtitles_for_frame (DCPTime time) const
 623 {
 624         list<PositionImage> subtitles;
 625
 626         BOOST_FOREACH (PlayerSubtitles i, _active_subtitles.get_burnt (time, _always_burn_subtitles)) {
 627
 628                 /* Image subtitles */
 629                 list<PositionImage> c = transform_image_subtitles (i.image);
 630                 copy (c.begin(), c.end(), back_inserter (subtitles));
 631
 632                 /* Text subtitles (rendered to an image) */
 633                 if (!i.text.empty ()) {
 634                         list<PositionImage> s = render_subtitles (i.text, i.fonts, _video_container_size, time);
 635                         copy (s.begin(), s.end(), back_inserter (subtitles));
 636                 }
 637         }
 638
 639         if (subtitles.empty ()) {
 640                 return optional<PositionImage> ();
 641         }
 642
 643         return merge (subtitles);
 644 }
 645
 646 void
 647 Player::video (weak_ptr<Piece> wp, ContentVideo video)
 648 {
 649         shared_ptr<Piece> piece = wp.lock ();
 650         if (!piece) {
 651                 return;
 652         }
 653
 654         FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
 655         if (frc.skip && (video.frame % 2) == 1) {
 656                 return;
 657         }
 658
 659         /* Time and period of the frame we will emit */
 660         DCPTime const time = content_video_to_dcp (piece, video.frame);
 661         DCPTimePeriod const period (time, time + one_video_frame());
 662
 663         /* Discard if it's outside the content's period or if it's before the last accurate seek */
 664         if (
 665                 time < piece->content->position() ||
 666                 time >= piece->content->end() ||
 667                 (_last_seek_time && _last_seek_accurate && time < _last_seek_time.get())) {
 668                 return;
 669         }
 670
 671         /* Fill gaps caused by (the hopefully rare event of) a decoder not emitting contiguous video.  We have to do this here
 672            as in the problematic case we are about to emit a frame which is not contiguous with the previous.
 673         */
 674
 675         if (_last_video_time) {
 676                 /* XXX: this may not work for 3D */
 677                 BOOST_FOREACH (DCPTimePeriod i, subtract(DCPTimePeriod (_last_video_time.get(), time), _no_video)) {
 678                         for (DCPTime j = i.from; j < i.to; j += one_video_frame()) {
 679                                 if (_last_video) {
 680                                         emit_video (shared_ptr<PlayerVideo> (new PlayerVideo (*_last_video)), j);
 681                                 } else {
 682                                         emit_video (black_player_video_frame(), j);
 683                                 }
 684                         }
 685                 }
 686         }
 687
 688         _last_video.reset (
 689                 new PlayerVideo (
 690                         video.image,
 691                         piece->content->video->crop (),
 692                         piece->content->video->fade (video.frame),
 693                         piece->content->video->scale().size (
 694                                 piece->content->video, _video_container_size, _film->frame_size ()
 695                                 ),
 696                         _video_container_size,
 697                         video.eyes,
 698                         video.part,
 699                         piece->content->video->colour_conversion ()
 700                         )
 701                 );
 702
 703         emit_video (_last_video, time);
 704 }
 705
 706 void
 707 Player::audio_flush (shared_ptr<Piece> piece, AudioStreamPtr stream)
 708 {
 709         shared_ptr<AudioContent> content = piece->content->audio;
 710         DCPOMATIC_ASSERT (content);
 711
 712         shared_ptr<Resampler> r = resampler (content, stream, false);
 713         if (!r) {
 714                 return;
 715         }
 716
 717         pair<shared_ptr<const AudioBuffers>, Frame> ro = r->flush ();
 718         if (ro.first->frames() == 0) {
 719                 return;
 720         }
 721
 722         ContentAudio content_audio;
 723         content_audio.audio = ro.first;
 724         content_audio.frame = ro.second;
 725
 726         /* Compute time in the DCP */
 727         DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
 728
 729         audio_transform (content, stream, content_audio, time);
 730 }
 731
 732 /** Do our common processing on some audio */
 733 void
 734 Player::audio_transform (shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time)
 735 {
 736         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
 737
 738         /* Gain */
 739
 740         if (content->gain() != 0) {
 741                 shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
 742                 gain->apply_gain (content->gain ());
 743                 content_audio.audio = gain;
 744         }
 745
 746         /* Remap */
 747
 748         shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), content_audio.audio->frames()));
 749         dcp_mapped->make_silent ();
 750
 751         AudioMapping map = stream->mapping ();
 752         for (int i = 0; i < map.input_channels(); ++i) {
 753                 for (int j = 0; j < dcp_mapped->channels(); ++j) {
 754                         if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
 755                                 dcp_mapped->accumulate_channel (
 756                                         content_audio.audio.get(),
 757                                         i,
 758                                         static_cast<dcp::Channel> (j),
 759                                         map.get (i, static_cast<dcp::Channel> (j))
 760                                         );
 761                         }
 762                 }
 763         }
 764
 765         content_audio.audio = dcp_mapped;
 766
 767         /* Process */
 768
 769         if (_audio_processor) {
 770                 content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
 771         }
 772
 773         /* Push */
 774
 775         _audio_merger.push (content_audio.audio, time);
 776         DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
 777         _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
 778 }
 779
 780 void
 781 Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
 782 {
 783         DCPOMATIC_ASSERT (content_audio.audio->frames() > 0);
 784
 785         shared_ptr<Piece> piece = wp.lock ();
 786         if (!piece) {
 787                 return;
 788         }
 789
 790         shared_ptr<AudioContent> content = piece->content->audio;
 791         DCPOMATIC_ASSERT (content);
 792
 793         /* Resample */
 794         if (stream->frame_rate() != content->resampled_frame_rate()) {
 795                 shared_ptr<Resampler> r = resampler (content, stream, true);
 796                 pair<shared_ptr<const AudioBuffers>, Frame> ro = r->run (content_audio.audio, content_audio.frame);
 797                 if (ro.first->frames() == 0) {
 798                         return;
 799                 }
 800                 content_audio.audio = ro.first;
 801                 content_audio.frame = ro.second;
 802         }
 803
 804         /* Compute time in the DCP */
 805         DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
 806         /* And the end of this block in the DCP */
 807         DCPTime end = time + DCPTime::from_frames(content_audio.audio->frames(), content->resampled_frame_rate());
 808
 809         /* Remove anything that comes before the start or after the end of the content */
 810         if (time < piece->content->position()) {
 811                 pair<shared_ptr<AudioBuffers>, DCPTime> cut = discard_audio (content_audio.audio, time, piece->content->position());
 812                 if (!cut.first) {
 813                         /* This audio is entirely discarded */
 814                         return;
 815                 }
 816                 content_audio.audio = cut.first;
 817                 time = cut.second;
 818         } else if (time > piece->content->end()) {
 819                 /* Discard it all */
 820                 return;
 821         } else if (end > piece->content->end()) {
 822                 Frame const remaining_frames = DCPTime(piece->content->end() - time).frames_round(_film->audio_frame_rate());
 823                 if (remaining_frames == 0) {
 824                         return;
 825                 }
 826                 shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
 827                 cut->copy_from (content_audio.audio.get(), remaining_frames, 0, 0);
 828                 content_audio.audio = cut;
 829         }
 830
 831         audio_transform (content, stream, content_audio, time);
 832 }
 833
 834 void
 835 Player::image_subtitle_start (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
 836 {
 837         shared_ptr<Piece> piece = wp.lock ();
 838         if (!piece) {
 839                 return;
 840         }
 841
 842         /* Apply content's subtitle offsets */
 843         subtitle.sub.rectangle.x += piece->content->subtitle->x_offset ();
 844         subtitle.sub.rectangle.y += piece->content->subtitle->y_offset ();
 845
 846         /* Apply content's subtitle scale */
 847         subtitle.sub.rectangle.width *= piece->content->subtitle->x_scale ();
 848         subtitle.sub.rectangle.height *= piece->content->subtitle->y_scale ();
 849
 850         /* Apply a corrective translation to keep the subtitle centred after that scale */
 851         subtitle.sub.rectangle.x -= subtitle.sub.rectangle.width * (piece->content->subtitle->x_scale() - 1);
 852         subtitle.sub.rectangle.y -= subtitle.sub.rectangle.height * (piece->content->subtitle->y_scale() - 1);
 853
 854         PlayerSubtitles ps;
 855         ps.image.push_back (subtitle.sub);
 856         DCPTime from (content_time_to_dcp (piece, subtitle.from()));
 857
 858         _active_subtitles.add_from (wp, ps, from);
 859 }
 860
 861 void
 862 Player::text_subtitle_start (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
 863 {
 864         shared_ptr<Piece> piece = wp.lock ();
 865         if (!piece) {
 866                 return;
 867         }
 868
 869         PlayerSubtitles ps;
 870         DCPTime const from (content_time_to_dcp (piece, subtitle.from()));
 871
 872         BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
 873                 s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
 874                 s.set_v_position (s.v_position() + piece->content->subtitle->y_offset ());
 875                 float const xs = piece->content->subtitle->x_scale();
 876                 float const ys = piece->content->subtitle->y_scale();
 877                 float size = s.size();
 878
 879                 /* Adjust size to express the common part of the scaling;
 880                    e.g. if xs = ys = 0.5 we scale size by 2.
 881                 */
 882                 if (xs > 1e-5 && ys > 1e-5) {
 883                         size *= 1 / min (1 / xs, 1 / ys);
 884                 }
 885                 s.set_size (size);
 886
 887                 /* Then express aspect ratio changes */
 888                 if (fabs (1.0 - xs / ys) > dcp::ASPECT_ADJUST_EPSILON) {
 889                         s.set_aspect_adjust (xs / ys);
 890                 }
 891
 892                 s.set_in (dcp::Time(from.seconds(), 1000));
 893                 ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
 894                 ps.add_fonts (piece->content->subtitle->fonts ());
 895         }
 896
 897         _active_subtitles.add_from (wp, ps, from);
 898 }
 899
 900 void
 901 Player::subtitle_stop (weak_ptr<Piece> wp, ContentTime to)
 902 {
 903         if (!_active_subtitles.have (wp)) {
 904                 return;
 905         }
 906
 907         shared_ptr<Piece> piece = wp.lock ();
 908         if (!piece) {
 909                 return;
 910         }
 911
 912         DCPTime const dcp_to = content_time_to_dcp (piece, to);
 913
 914         pair<PlayerSubtitles, DCPTime> from = _active_subtitles.add_to (wp, dcp_to);
 915
 916         if (piece->content->subtitle->use() && !_always_burn_subtitles && !piece->content->subtitle->burn()) {
 917                 Subtitle (from.first, DCPTimePeriod (from.second, dcp_to));
 918         }
 919 }
 920
 921 void
 922 Player::seek (DCPTime time, bool accurate)
 923 {
 924         if (_audio_processor) {
 925                 _audio_processor->flush ();
 926         }
 927
 928         for (ResamplerMap::iterator i = _resamplers.begin(); i != _resamplers.end(); ++i) {
 929                 i->second->flush ();
 930                 i->second->reset ();
 931         }
 932
 933         _audio_merger.clear ();
 934         _active_subtitles.clear ();
 935
 936         BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
 937                 if (time < i->content->position()) {
 938                         /* Before; seek to 0 */
 939                         i->decoder->seek (ContentTime(), accurate);
 940                         i->done = false;
 941                 } else if (i->content->position() <= time && time < i->content->end()) {
 942                         /* During; seek to position */
 943                         i->decoder->seek (dcp_to_content_time (i, time), accurate);
 944                         i->done = false;
 945                 } else {
 946                         /* After; this piece is done */
 947                         i->done = true;
 948                 }
 949         }
 950
 951         _last_video_time = optional<DCPTime> ();
 952         _last_audio_time = optional<DCPTime> ();
 953         _last_seek_time = time;
 954         _last_seek_accurate = accurate;
 955 }
 956
 957 shared_ptr<Resampler>
 958 Player::resampler (shared_ptr<const AudioContent> content, AudioStreamPtr stream, bool create)
 959 {
 960         ResamplerMap::const_iterator i = _resamplers.find (make_pair (content, stream));
 961         if (i != _resamplers.end ()) {
 962                 return i->second;
 963         }
 964
 965         if (!create) {
 966                 return shared_ptr<Resampler> ();
 967         }
 968
 969         LOG_GENERAL (
 970                 "Creating new resampler from %1 to %2 with %3 channels",
 971                 stream->frame_rate(),
 972                 content->resampled_frame_rate(),
 973                 stream->channels()
 974                 );
 975
 976         shared_ptr<Resampler> r (
 977                 new Resampler (stream->frame_rate(), content->resampled_frame_rate(), stream->channels())
 978                 );
 979
 980         _resamplers[make_pair(content, stream)] = r;
 981         return r;
 982 }
 983
 984 void
 985 Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
 986 {
 987         optional<PositionImage> subtitles = subtitles_for_frame (time);
 988         if (subtitles) {
 989                 pv->set_subtitle (subtitles.get ());
 990         }
 991         Video (pv, time);
 992         _last_video_time = time + one_video_frame();
 993         _active_subtitles.clear_before (time);
 994 }
 995
 996 void
 997 Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
 998 {
 999         Audio (data, time);
1000         _last_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate ());
1001 }
1002
1003 void
1004 Player::fill_audio (DCPTimePeriod period)
1005 {
1006         BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_audio)) {
1007                 DCPTime t = i.from;
1008                 while (t < i.to) {
1009                         DCPTime block = min (DCPTime::from_seconds (0.5), i.to - t);
1010                         Frame const samples = block.frames_round(_film->audio_frame_rate());
1011                         if (samples) {
1012                                 shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
1013                                 silence->make_silent ();
1014                                 emit_audio (silence, t);
1015                         }
1016                         t += block;
1017                 }
1018         }
1019 }
1020
1021 DCPTime
1022 Player::one_video_frame () const
1023 {
1024         return DCPTime::from_frames (1, _film->video_frame_rate ());
1025 }
1026
1027 pair<shared_ptr<AudioBuffers>, DCPTime>
1028 Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
1029 {
1030         DCPTime const discard_time = discard_to - time;
1031         Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
1032         Frame remaining_frames = audio->frames() - discard_frames;
1033         if (remaining_frames <= 0) {
1034                 return make_pair(shared_ptr<AudioBuffers>(), DCPTime());
1035         }
1036         shared_ptr<AudioBuffers> cut (new AudioBuffers (audio->channels(), remaining_frames));
1037         cut->copy_from (audio.get(), remaining_frames, discard_frames, 0);
1038         return make_pair(cut, time + discard_time);
1039 }