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