src/wx/film_viewer.cc

   1 /*
   2     Copyright (C) 2012-2021 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 /** @file  src/film_viewer.cc
  23  *  @brief A wx widget to view a preview of a Film.
  24  */
  25
  26
  27 #include "closed_captions_dialog.h"
  28 #include "film_viewer.h"
  29 #include "gl_video_view.h"
  30 #include "nag_dialog.h"
  31 #include "playhead_to_frame_dialog.h"
  32 #include "playhead_to_timecode_dialog.h"
  33 #include "simple_video_view.h"
  34 #include "wx_util.h"
  35 #include "lib/butler.h"
  36 #include "lib/compose.hpp"
  37 #include "lib/config.h"
  38 #include "lib/dcpomatic_log.h"
  39 #include "lib/examine_content_job.h"
  40 #include "lib/exceptions.h"
  41 #include "lib/film.h"
  42 #include "lib/filter.h"
  43 #include "lib/image.h"
  44 #include "lib/job_manager.h"
  45 #include "lib/log.h"
  46 #include "lib/player.h"
  47 #include "lib/player_video.h"
  48 #include "lib/ratio.h"
  49 #include "lib/text_content.h"
  50 #include "lib/timer.h"
  51 #include "lib/util.h"
  52 #include "lib/video_content.h"
  53 #include "lib/video_decoder.h"
  54 #include <dcp/exceptions.h>
  55 #include <dcp/warnings.h>
  56 extern "C" {
  57 #include <libavutil/pixfmt.h>
  58 }
  59 LIBDCP_DISABLE_WARNINGS
  60 #include <wx/tglbtn.h>
  61 LIBDCP_ENABLE_WARNINGS
  62 #include <iomanip>
  63
  64
  65 using std::bad_alloc;
  66 using std::dynamic_pointer_cast;
  67 using std::make_shared;
  68 using std::max;
  69 using std::shared_ptr;
  70 using std::string;
  71 using std::vector;
  72 using boost::optional;
  73 #if BOOST_VERSION >= 106100
  74 using namespace boost::placeholders;
  75 #endif
  76 using dcp::Size;
  77 using namespace dcpomatic;
  78
  79
  80 static
  81 int
  82 rtaudio_callback (void* out, void *, unsigned int frames, double, RtAudioStreamStatus, void* data)
  83 {
  84         return reinterpret_cast<FilmViewer*>(data)->audio_callback (out, frames);
  85 }
  86
  87
  88 FilmViewer::FilmViewer (wxWindow* p)
  89         : _audio (DCPOMATIC_RTAUDIO_API)
  90         , _closed_captions_dialog (new ClosedCaptionsDialog(p, this))
  91 {
  92 #if wxCHECK_VERSION(3, 1, 0)
  93         switch (Config::instance()->video_view_type()) {
  94         case Config::VIDEO_VIEW_OPENGL:
  95                 _video_view = std::make_shared<GLVideoView>(this, p);
  96                 break;
  97         case Config::VIDEO_VIEW_SIMPLE:
  98                 _video_view = std::make_shared<SimpleVideoView>(this, p);
  99                 break;
 100         }
 101 #else
 102         _video_view = std::make_shared<SimpleVideoView>(this, p);
 103 #endif
 104
 105         _video_view->Sized.connect (boost::bind(&FilmViewer::video_view_sized, this));
 106         _video_view->TooManyDropped.connect (boost::bind(boost::ref(TooManyDropped)));
 107
 108         set_film (shared_ptr<Film>());
 109
 110         _config_changed_connection = Config::instance()->Changed.connect(bind(&FilmViewer::config_changed, this, _1));
 111         config_changed (Config::SOUND_OUTPUT);
 112 }
 113
 114
 115 FilmViewer::~FilmViewer ()
 116 {
 117         stop ();
 118 }
 119
 120
 121 /** Ask for ::idle_handler() to be called next time we are idle */
 122 void
 123 FilmViewer::request_idle_display_next_frame ()
 124 {
 125         if (_idle_get) {
 126                 return;
 127         }
 128
 129         _idle_get = true;
 130         DCPOMATIC_ASSERT (signal_manager);
 131         signal_manager->when_idle (boost::bind(&FilmViewer::idle_handler, this));
 132 }
 133
 134
 135 void
 136 FilmViewer::idle_handler ()
 137 {
 138         if (!_idle_get) {
 139                 return;
 140         }
 141
 142         if (_video_view->display_next_frame(true) == VideoView::AGAIN) {
 143                 /* get() could not complete quickly so we'll try again later */
 144                 signal_manager->when_idle (boost::bind(&FilmViewer::idle_handler, this));
 145         } else {
 146                 _idle_get = false;
 147         }
 148 }
 149
 150
 151 void
 152 FilmViewer::set_film (shared_ptr<Film> film)
 153 {
 154         if (_film == film) {
 155                 return;
 156         }
 157
 158         _film = film;
 159
 160         _video_view->clear ();
 161         _closed_captions_dialog->clear ();
 162
 163         if (!_film) {
 164                 _player = boost::none;
 165                 recreate_butler ();
 166                 _video_view->update ();
 167                 return;
 168         }
 169
 170         try {
 171                 _player.emplace(_film, _optimise_for_j2k ? Image::Alignment::COMPACT : Image::Alignment::PADDED);
 172                 _player->set_fast ();
 173                 if (_dcp_decode_reduction) {
 174                         _player->set_dcp_decode_reduction (_dcp_decode_reduction);
 175                 }
 176         } catch (bad_alloc &) {
 177                 error_dialog (_video_view->get(), _("There is not enough free memory to do that."));
 178                 _film.reset ();
 179                 return;
 180         }
 181
 182         _player->set_always_burn_open_subtitles ();
 183         _player->set_play_referenced ();
 184
 185         _film->Change.connect (boost::bind (&FilmViewer::film_change, this, _1, _2));
 186         _film->LengthChange.connect (boost::bind(&FilmViewer::film_length_change, this));
 187         _player->Change.connect (boost::bind (&FilmViewer::player_change, this, _1, _2, _3));
 188
 189         film_change (ChangeType::DONE, Film::Property::VIDEO_FRAME_RATE);
 190         film_change (ChangeType::DONE, Film::Property::THREE_D);
 191         film_length_change ();
 192
 193         /* Keep about 1 second's worth of history samples */
 194         _latency_history_count = _film->audio_frame_rate() / _audio_block_size;
 195
 196         _closed_captions_dialog->update_tracks (_film);
 197
 198         recreate_butler ();
 199
 200         calculate_sizes ();
 201         slow_refresh ();
 202 }
 203
 204
 205 void
 206 FilmViewer::recreate_butler ()
 207 {
 208         suspend ();
 209         _butler.reset ();
 210
 211         if (!_film) {
 212                 resume ();
 213                 return;
 214         }
 215
 216 #if wxCHECK_VERSION(3, 1, 0)
 217         auto const j2k_gl_optimised = dynamic_pointer_cast<GLVideoView>(_video_view) && _optimise_for_j2k;
 218 #else
 219         auto const j2k_gl_optimised = false;
 220 #endif
 221
 222         DCPOMATIC_ASSERT(_player);
 223
 224         _butler = std::make_shared<Butler>(
 225                 _film,
 226                 *_player,
 227                 Config::instance()->audio_mapping(_audio_channels),
 228                 _audio_channels,
 229                 boost::bind(&PlayerVideo::force, AV_PIX_FMT_RGB24),
 230                 VideoRange::FULL,
 231                 j2k_gl_optimised ? Image::Alignment::COMPACT : Image::Alignment::PADDED,
 232                 true,
 233                 j2k_gl_optimised,
 234                 (Config::instance()->sound() && _audio.isStreamOpen()) ? Butler::Audio::ENABLED : Butler::Audio::DISABLED
 235                 );
 236
 237         _closed_captions_dialog->set_butler (_butler);
 238
 239         resume ();
 240 }
 241
 242
 243 void
 244 FilmViewer::set_outline_content (bool o)
 245 {
 246         _outline_content = o;
 247         _video_view->update ();
 248 }
 249
 250
 251 void
 252 FilmViewer::set_outline_subtitles (optional<dcpomatic::Rect<double>> rect)
 253 {
 254         _outline_subtitles = rect;
 255         _video_view->update ();
 256 }
 257
 258
 259 void
 260 FilmViewer::set_eyes (Eyes e)
 261 {
 262         _video_view->set_eyes (e);
 263         slow_refresh ();
 264 }
 265
 266
 267 void
 268 FilmViewer::video_view_sized ()
 269 {
 270         calculate_sizes ();
 271         if (!quick_refresh()) {
 272                 slow_refresh ();
 273         }
 274 }
 275
 276
 277 void
 278 FilmViewer::calculate_sizes ()
 279 {
 280         if (!_film || !_player) {
 281                 return;
 282         }
 283
 284         auto const container = _film->container ();
 285
 286         auto const scale = dpi_scale_factor (_video_view->get());
 287         int const video_view_width = std::round(_video_view->get()->GetSize().x * scale);
 288         int const video_view_height = std::round(_video_view->get()->GetSize().y * scale);
 289
 290         auto const view_ratio = float(video_view_width) / video_view_height;
 291         auto const film_ratio = container ? container->ratio () : 1.78;
 292
 293         dcp::Size out_size;
 294         if (view_ratio < film_ratio) {
 295                 /* panel is less widscreen than the film; clamp width */
 296                 out_size.width = video_view_width;
 297                 out_size.height = lrintf (out_size.width / film_ratio);
 298         } else {
 299                 /* panel is more widescreen than the film; clamp height */
 300                 out_size.height = video_view_height;
 301                 out_size.width = lrintf (out_size.height * film_ratio);
 302         }
 303
 304         /* Catch silly values */
 305         out_size.width = max (64, out_size.width);
 306         out_size.height = max (64, out_size.height);
 307
 308         /* Make sure the video container sizes are always a multiple of 2 so that
 309          * we don't get gaps with subsampled sources (e.g. YUV420)
 310          */
 311         if (out_size.width % 2) {
 312                 out_size.width++;
 313         }
 314         if (out_size.height % 2) {
 315                 out_size.height++;
 316         }
 317
 318         _player->set_video_container_size (out_size);
 319 }
 320
 321
 322 void
 323 FilmViewer::suspend ()
 324 {
 325         ++_suspended;
 326         if (_audio.isStreamRunning()) {
 327                 _audio.abortStream();
 328         }
 329 }
 330
 331
 332 void
 333 FilmViewer::start_audio_stream_if_open ()
 334 {
 335         if (_audio.isStreamOpen()) {
 336                 _audio.setStreamTime (_video_view->position().seconds());
 337                 try {
 338                         _audio.startStream ();
 339                 } catch (RtAudioError& e) {
 340                         _audio_channels = 0;
 341                         error_dialog (
 342                                 _video_view->get(),
 343                                 _("There was a problem starting audio playback.  Please try another audio output device in Preferences."), std_to_wx(e.what())
 344                                 );
 345                 }
 346         }
 347 }
 348
 349
 350 void
 351 FilmViewer::resume ()
 352 {
 353         DCPOMATIC_ASSERT (_suspended > 0);
 354         --_suspended;
 355         if (_playing && !_suspended) {
 356                 start_audio_stream_if_open ();
 357                 _video_view->start ();
 358         }
 359 }
 360
 361
 362 void
 363 FilmViewer::start ()
 364 {
 365         if (!_film) {
 366                 return;
 367         }
 368
 369         auto v = PlaybackPermitted ();
 370         if (v && !*v) {
 371                 /* Computer says no */
 372                 return;
 373         }
 374
 375         /* We are about to set up the audio stream from the position of the video view.
 376            If there is `lazy' seek in progress we need to wait for it to go through so that
 377            _video_view->position() gives us a sensible answer.
 378          */
 379         while (_idle_get) {
 380                 idle_handler ();
 381         }
 382
 383         /* Take the video view's idea of position as our `playhead' and start the
 384            audio stream (which is the timing reference) there.
 385          */
 386         start_audio_stream_if_open ();
 387
 388         _playing = true;
 389         /* Calling start() below may directly result in Stopped being emitted, and if that
 390          * happens we want it to come after the Started signal, so do that first.
 391          */
 392         Started ();
 393         _video_view->start ();
 394 }
 395
 396
 397 bool
 398 FilmViewer::stop ()
 399 {
 400         if (_audio.isStreamRunning()) {
 401                 /* stop stream and discard any remaining queued samples */
 402                 _audio.abortStream ();
 403         }
 404
 405         if (!_playing) {
 406                 return false;
 407         }
 408
 409         _playing = false;
 410         _video_view->stop ();
 411         Stopped ();
 412
 413         _video_view->rethrow ();
 414         return true;
 415 }
 416
 417
 418 void
 419 FilmViewer::player_change (ChangeType type, int property, bool frequent)
 420 {
 421         if (type != ChangeType::DONE || frequent) {
 422                 return;
 423         }
 424
 425         if (_coalesce_player_changes) {
 426                 _pending_player_changes.push_back (property);
 427                 return;
 428         }
 429
 430         player_change ({property});
 431 }
 432
 433
 434 void
 435 FilmViewer::player_change (vector<int> properties)
 436 {
 437         calculate_sizes ();
 438
 439         bool try_quick_refresh = false;
 440         bool update_ccap_tracks = false;
 441
 442         for (auto i: properties) {
 443                 if (
 444                         i == VideoContentProperty::CROP ||
 445                         i == VideoContentProperty::CUSTOM_RATIO ||
 446                         i == VideoContentProperty::CUSTOM_SIZE ||
 447                         i == VideoContentProperty::FADE_IN ||
 448                         i == VideoContentProperty::FADE_OUT ||
 449                         i == VideoContentProperty::COLOUR_CONVERSION ||
 450                         i == PlayerProperty::VIDEO_CONTAINER_SIZE ||
 451                         i == PlayerProperty::FILM_CONTAINER
 452                    ) {
 453                         try_quick_refresh = true;
 454                 }
 455
 456                 if (i == TextContentProperty::USE || i == TextContentProperty::TYPE || i == TextContentProperty::DCP_TRACK) {
 457                         update_ccap_tracks = true;
 458                 }
 459         }
 460
 461         if (!try_quick_refresh || !quick_refresh()) {
 462                 slow_refresh ();
 463         }
 464
 465         if (update_ccap_tracks) {
 466                 _closed_captions_dialog->update_tracks (_film);
 467         }
 468 }
 469
 470
 471 void
 472 FilmViewer::film_change (ChangeType type, Film::Property p)
 473 {
 474         if (type != ChangeType::DONE) {
 475                 return;
 476         }
 477
 478         if (p == Film::Property::AUDIO_CHANNELS) {
 479                 recreate_butler ();
 480         } else if (p == Film::Property::VIDEO_FRAME_RATE) {
 481                 _video_view->set_video_frame_rate (_film->video_frame_rate());
 482         } else if (p == Film::Property::THREE_D) {
 483                 _video_view->set_three_d (_film->three_d());
 484         } else if (p == Film::Property::CONTENT) {
 485                 _closed_captions_dialog->update_tracks (_film);
 486         }
 487 }
 488
 489
 490 void
 491 FilmViewer::film_length_change ()
 492 {
 493         _video_view->set_length (_film->length());
 494 }
 495
 496
 497 /** Re-get the current frame slowly by seeking */
 498 void
 499 FilmViewer::slow_refresh ()
 500 {
 501         seek (_video_view->position(), true);
 502 }
 503
 504
 505 /** Try to re-get the current frame quickly by resetting the metadata
 506  *  in the PlayerVideo that we used last time.
 507  *  @return true if this was possible, false if not.
 508  */
 509 bool
 510 FilmViewer::quick_refresh ()
 511 {
 512         if (!_video_view || !_film || !_player) {
 513                 return true;
 514         }
 515         return _video_view->reset_metadata (_film, _player->video_container_size());
 516 }
 517
 518
 519 void
 520 FilmViewer::seek (shared_ptr<Content> content, ContentTime t, bool accurate)
 521 {
 522         DCPOMATIC_ASSERT(_player);
 523         auto dt = _player->content_time_to_dcp (content, t);
 524         if (dt) {
 525                 seek (*dt, accurate);
 526         }
 527 }
 528
 529
 530 void
 531 FilmViewer::set_coalesce_player_changes (bool c)
 532 {
 533         _coalesce_player_changes = c;
 534
 535         if (!c) {
 536                 player_change (_pending_player_changes);
 537                 _pending_player_changes.clear ();
 538         }
 539 }
 540
 541
 542 void
 543 FilmViewer::seek (DCPTime t, bool accurate)
 544 {
 545         if (!_butler) {
 546                 return;
 547         }
 548
 549         if (t < DCPTime()) {
 550                 t = DCPTime ();
 551         }
 552
 553         if (t >= _film->length()) {
 554                 t = _film->length() - one_video_frame();
 555         }
 556
 557         suspend ();
 558
 559         _closed_captions_dialog->clear ();
 560         _butler->seek (t, accurate);
 561
 562         if (!_playing) {
 563                 /* We're not playing, so let the GUI thread get on and
 564                    come back later to get the next frame after the seek.
 565                 */
 566                 request_idle_display_next_frame ();
 567         } else {
 568                 /* We're going to start playing again straight away
 569                    so wait for the seek to finish.
 570                 */
 571                 while (_video_view->display_next_frame(false) == VideoView::AGAIN) {}
 572         }
 573
 574         resume ();
 575 }
 576
 577
 578 void
 579 FilmViewer::config_changed (Config::Property p)
 580 {
 581         if (p == Config::AUDIO_MAPPING) {
 582                 recreate_butler ();
 583                 return;
 584         }
 585
 586         if (p != Config::SOUND && p != Config::SOUND_OUTPUT) {
 587                 return;
 588         }
 589
 590         if (_audio.isStreamOpen ()) {
 591                 _audio.closeStream ();
 592         }
 593
 594         if (Config::instance()->sound() && _audio.getDeviceCount() > 0) {
 595                 unsigned int st = 0;
 596                 if (Config::instance()->sound_output()) {
 597                         while (st < _audio.getDeviceCount()) {
 598                                 try {
 599                                         if (_audio.getDeviceInfo(st).name == Config::instance()->sound_output().get()) {
 600                                                 break;
 601                                         }
 602                                 } catch (RtAudioError&) {
 603                                         /* Something went wrong with that device so we don't want to use it anyway */
 604                                 }
 605                                 ++st;
 606                         }
 607                         if (st == _audio.getDeviceCount()) {
 608                                 st = _audio.getDefaultOutputDevice();
 609                         }
 610                 } else {
 611                         st = _audio.getDefaultOutputDevice();
 612                 }
 613
 614                 try {
 615                         _audio_channels = _audio.getDeviceInfo(st).outputChannels;
 616                         RtAudio::StreamParameters sp;
 617                         sp.deviceId = st;
 618                         sp.nChannels = _audio_channels;
 619                         sp.firstChannel = 0;
 620                         _audio.openStream (&sp, 0, RTAUDIO_FLOAT32, 48000, &_audio_block_size, &rtaudio_callback, this);
 621                 } catch (RtAudioError& e) {
 622                         _audio_channels = 0;
 623                         error_dialog (
 624                                 _video_view->get(),
 625                                 _("Could not set up audio output.  There will be no audio during the preview."), std_to_wx(e.what())
 626                                 );
 627                 }
 628                 recreate_butler ();
 629
 630         } else {
 631                 _audio_channels = 0;
 632                 recreate_butler ();
 633         }
 634 }
 635
 636
 637 DCPTime
 638 FilmViewer::uncorrected_time () const
 639 {
 640         if (_audio.isStreamRunning()) {
 641                 return DCPTime::from_seconds (const_cast<RtAudio*>(&_audio)->getStreamTime());
 642         }
 643
 644         return _video_view->position();
 645 }
 646
 647
 648 optional<DCPTime>
 649 FilmViewer::audio_time () const
 650 {
 651         if (!_audio.isStreamRunning()) {
 652                 return {};
 653         }
 654
 655         return DCPTime::from_seconds (const_cast<RtAudio*>(&_audio)->getStreamTime ()) -
 656                 DCPTime::from_frames (average_latency(), _film->audio_frame_rate());
 657 }
 658
 659
 660 DCPTime
 661 FilmViewer::time () const
 662 {
 663         return audio_time().get_value_or(_video_view->position());
 664 }
 665
 666
 667 int
 668 FilmViewer::audio_callback (void* out_p, unsigned int frames)
 669 {
 670         while (true) {
 671                 auto t = _butler->get_audio (Butler::Behaviour::NON_BLOCKING, reinterpret_cast<float*> (out_p), frames);
 672                 if (!t || DCPTime(uncorrected_time() - *t) < one_video_frame()) {
 673                         /* There was an underrun or this audio is on time; carry on */
 674                         break;
 675                 }
 676                 /* The audio we just got was (very) late; drop it and get some more. */
 677         }
 678
 679         boost::mutex::scoped_lock lm (_latency_history_mutex, boost::try_to_lock);
 680         if (lm) {
 681                 _latency_history.push_back (_audio.getStreamLatency ());
 682                 if (_latency_history.size() > static_cast<size_t> (_latency_history_count)) {
 683                         _latency_history.pop_front ();
 684                 }
 685         }
 686
 687         return 0;
 688 }
 689
 690
 691 Frame
 692 FilmViewer::average_latency () const
 693 {
 694         boost::mutex::scoped_lock lm (_latency_history_mutex);
 695         if (_latency_history.empty()) {
 696                 return 0;
 697         }
 698
 699         Frame total = 0;
 700         for (auto i: _latency_history) {
 701                 total += i;
 702         }
 703
 704         return total / _latency_history.size();
 705 }
 706
 707
 708 void
 709 FilmViewer::set_dcp_decode_reduction (optional<int> reduction)
 710 {
 711         _dcp_decode_reduction = reduction;
 712         if (_player) {
 713                 _player->set_dcp_decode_reduction (reduction);
 714         }
 715 }
 716
 717
 718 optional<int>
 719 FilmViewer::dcp_decode_reduction () const
 720 {
 721         return _dcp_decode_reduction;
 722 }
 723
 724
 725 optional<ContentTime>
 726 FilmViewer::position_in_content (shared_ptr<const Content> content) const
 727 {
 728         DCPOMATIC_ASSERT(_player);
 729         return _player->dcp_to_content_time (content, position());
 730 }
 731
 732
 733 DCPTime
 734 FilmViewer::one_video_frame () const
 735 {
 736         return DCPTime::from_frames (1, _film ? _film->video_frame_rate() : 24);
 737 }
 738
 739
 740 /** Open a dialog box showing our film's closed captions */
 741 void
 742 FilmViewer::show_closed_captions ()
 743 {
 744         _closed_captions_dialog->Show();
 745 }
 746
 747
 748 void
 749 FilmViewer::seek_by (DCPTime by, bool accurate)
 750 {
 751         seek (_video_view->position() + by, accurate);
 752 }
 753
 754
 755 void
 756 FilmViewer::set_pad_black (bool p)
 757 {
 758         _pad_black = p;
 759 }
 760
 761
 762 /** Called when a player has finished the current film.
 763  *  May be called from a non-UI thread.
 764  */
 765 void
 766 FilmViewer::finished ()
 767 {
 768         emit (boost::bind(&FilmViewer::ui_finished, this));
 769 }
 770
 771
 772 /** Called by finished() in the UI thread */
 773 void
 774 FilmViewer::ui_finished ()
 775 {
 776         stop ();
 777         Finished ();
 778 }
 779
 780
 781 int
 782 FilmViewer::dropped () const
 783 {
 784         return _video_view->dropped ();
 785 }
 786
 787
 788 int
 789 FilmViewer::errored () const
 790 {
 791         return _video_view->errored ();
 792 }
 793
 794
 795 int
 796 FilmViewer::gets () const
 797 {
 798         return _video_view->gets ();
 799 }
 800
 801
 802 void
 803 FilmViewer::image_changed (shared_ptr<PlayerVideo> pv)
 804 {
 805         emit (boost::bind(boost::ref(ImageChanged), pv));
 806 }
 807
 808
 809 void
 810 FilmViewer::set_optimise_for_j2k (bool o)
 811 {
 812         _optimise_for_j2k = o;
 813         _video_view->set_optimise_for_j2k (o);
 814 }
 815
 816
 817 void
 818 FilmViewer::set_crop_guess (dcpomatic::Rect<float> crop)
 819 {
 820         if (crop != _crop_guess) {
 821                 _crop_guess = crop;
 822                 _video_view->update ();
 823         }
 824 }
 825
 826
 827 void
 828 FilmViewer::unset_crop_guess ()
 829 {
 830         _crop_guess = boost::none;
 831         _video_view->update ();
 832 }
 833