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