src/wx/film_viewer.cc

   1 /*
   2     Copyright (C) 2012-2019 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 /** @file  src/film_viewer.cc
  22  *  @brief A wx widget to view a preview of a Film.
  23  */
  24
  25 #include "film_viewer.h"
  26 #include "playhead_to_timecode_dialog.h"
  27 #include "playhead_to_frame_dialog.h"
  28 #include "wx_util.h"
  29 #include "closed_captions_dialog.h"
  30 #include "gl_video_view.h"
  31 #include "simple_video_view.h"
  32 #include "lib/film.h"
  33 #include "lib/ratio.h"
  34 #include "lib/util.h"
  35 #include "lib/job_manager.h"
  36 #include "lib/image.h"
  37 #include "lib/exceptions.h"
  38 #include "lib/examine_content_job.h"
  39 #include "lib/filter.h"
  40 #include "lib/player.h"
  41 #include "lib/player_video.h"
  42 #include "lib/video_content.h"
  43 #include "lib/video_decoder.h"
  44 #include "lib/timer.h"
  45 #include "lib/butler.h"
  46 #include "lib/log.h"
  47 #include "lib/config.h"
  48 #include "lib/compose.hpp"
  49 #include "lib/dcpomatic_log.h"
  50 extern "C" {
  51 #include <libavutil/pixfmt.h>
  52 }
  53 #include <dcp/exceptions.h>
  54 #include <wx/tglbtn.h>
  55 #include <iostream>
  56 #include <iomanip>
  57
  58 using std::string;
  59 using std::pair;
  60 using std::min;
  61 using std::max;
  62 using std::cout;
  63 using std::list;
  64 using std::bad_alloc;
  65 using std::make_pair;
  66 using std::exception;
  67 using boost::shared_ptr;
  68 using boost::dynamic_pointer_cast;
  69 using boost::weak_ptr;
  70 using boost::optional;
  71 using dcp::Size;
  72 using namespace dcpomatic;
  73
  74 static
  75 int
  76 rtaudio_callback (void* out, void *, unsigned int frames, double, RtAudioStreamStatus, void* data)
  77 {
  78         return reinterpret_cast<FilmViewer*>(data)->audio_callback (out, frames);
  79 }
  80
  81 FilmViewer::FilmViewer (wxWindow* p)
  82         : _coalesce_player_changes (false)
  83         , _audio (DCPOMATIC_RTAUDIO_API)
  84         , _audio_channels (0)
  85         , _audio_block_size (1024)
  86         , _playing (false)
  87         , _suspended (0)
  88         , _latency_history_count (0)
  89         , _dropped (0)
  90         , _closed_captions_dialog (new ClosedCaptionsDialog(p, this))
  91         , _outline_content (false)
  92         , _eyes (EYES_LEFT)
  93         , _pad_black (false)
  94 #ifdef DCPOMATIC_VARIANT_SWAROOP
  95         , _background_image (false)
  96 #endif
  97         , _state_timer ("viewer")
  98         , _gets (0)
  99         , _idle_get (false)
 100 {
 101         switch (Config::instance()->video_view_type()) {
 102         case Config::VIDEO_VIEW_OPENGL:
 103                 _video_view = new GLVideoView (this, p);
 104                 break;
 105         case Config::VIDEO_VIEW_SIMPLE:
 106                 _video_view = new SimpleVideoView (this, p);
 107                 break;
 108         }
 109
 110         _video_view->Sized.connect (boost::bind(&FilmViewer::video_view_sized, this));
 111
 112         set_film (shared_ptr<Film> ());
 113
 114         _config_changed_connection = Config::instance()->Changed.connect (bind (&FilmViewer::config_changed, this, _1));
 115         config_changed (Config::SOUND_OUTPUT);
 116 }
 117
 118 FilmViewer::~FilmViewer ()
 119 {
 120         stop ();
 121 }
 122
 123 /** Ask for ::get() to be called next time we are idle */
 124 void
 125 FilmViewer::request_idle_display_next_frame ()
 126 {
 127         if (_idle_get) {
 128                 return;
 129         }
 130
 131         _idle_get = true;
 132         DCPOMATIC_ASSERT (signal_manager);
 133         signal_manager->when_idle (boost::bind(&FilmViewer::idle_handler, this));
 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)) {
 144                 _idle_get = false;
 145         } else {
 146                 /* get() could not complete quickly so we'll try again later */
 147                 signal_manager->when_idle (boost::bind(&FilmViewer::idle_handler, this));
 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         _video_view->clear ();
 160
 161         _video_view->set_image (shared_ptr<Image>());
 162         _closed_captions_dialog->clear ();
 163
 164         if (!_film) {
 165                 _player.reset ();
 166                 recreate_butler ();
 167                 refresh_view ();
 168                 return;
 169         }
 170
 171         try {
 172                 _player.reset (new Player (_film, _film->playlist ()));
 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         _player->Change.connect (boost::bind (&FilmViewer::player_change, this, _1, _2, _3));
 188
 189         /* Keep about 1 second's worth of history samples */
 190         _latency_history_count = _film->audio_frame_rate() / _audio_block_size;
 191
 192         recreate_butler ();
 193
 194         calculate_sizes ();
 195         slow_refresh ();
 196 }
 197
 198 void
 199 FilmViewer::recreate_butler ()
 200 {
 201         suspend ();
 202         _butler.reset ();
 203
 204         if (!_film) {
 205                 resume ();
 206                 return;
 207         }
 208
 209         _butler.reset(
 210                 new Butler(
 211                         _player,
 212                         Config::instance()->audio_mapping(_audio_channels),
 213                         _audio_channels,
 214                         bind(&PlayerVideo::force, _1, AV_PIX_FMT_RGB24),
 215                         false,
 216                         true
 217                         )
 218                 );
 219
 220         if (!Config::instance()->sound() && !_audio.isStreamOpen()) {
 221                 _butler->disable_audio ();
 222         }
 223
 224         _closed_captions_dialog->set_film_and_butler (_film, _butler);
 225
 226         resume ();
 227 }
 228
 229 void
 230 FilmViewer::refresh_view ()
 231 {
 232         _state_timer.set ("update-view");
 233         _video_view->update ();
 234         _state_timer.unset ();
 235 }
 236
 237 void
 238 FilmViewer::set_outline_content (bool o)
 239 {
 240         _outline_content = o;
 241         refresh_view ();
 242 }
 243
 244 void
 245 FilmViewer::set_eyes (Eyes e)
 246 {
 247         _eyes = e;
 248         slow_refresh ();
 249 }
 250
 251 void
 252 FilmViewer::video_view_sized ()
 253 {
 254         calculate_sizes ();
 255         if (!quick_refresh()) {
 256                 slow_refresh ();
 257         }
 258 }
 259
 260 void
 261 FilmViewer::calculate_sizes ()
 262 {
 263         if (!_film || !_player) {
 264                 return;
 265         }
 266
 267         Ratio const * container = _film->container ();
 268
 269         float const view_ratio = float(_video_view->get()->GetSize().x) / _video_view->get()->GetSize().y;
 270         float const film_ratio = container ? container->ratio () : 1.78;
 271
 272         if (view_ratio < film_ratio) {
 273                 /* panel is less widscreen than the film; clamp width */
 274                 _out_size.width = _video_view->get()->GetSize().x;
 275                 _out_size.height = lrintf (_out_size.width / film_ratio);
 276         } else {
 277                 /* panel is more widescreen than the film; clamp height */
 278                 _out_size.height = _video_view->get()->GetSize().y;
 279                 _out_size.width = lrintf (_out_size.height * film_ratio);
 280         }
 281
 282         /* Catch silly values */
 283         _out_size.width = max (64, _out_size.width);
 284         _out_size.height = max (64, _out_size.height);
 285
 286         _player->set_video_container_size (_out_size);
 287 }
 288
 289 void
 290 FilmViewer::suspend ()
 291 {
 292         ++_suspended;
 293         if (_audio.isStreamRunning()) {
 294                 _audio.abortStream();
 295         }
 296 }
 297
 298 void
 299 FilmViewer::resume ()
 300 {
 301         --_suspended;
 302         if (_playing && !_suspended) {
 303                 if (_audio.isStreamOpen()) {
 304                         _audio.setStreamTime (_video_view->position().seconds());
 305                         _audio.startStream ();
 306                 }
 307                 _video_view->start ();
 308         }
 309 }
 310
 311 void
 312 FilmViewer::start ()
 313 {
 314         if (!_film) {
 315                 return;
 316         }
 317
 318         optional<bool> v = PlaybackPermitted ();
 319         if (v && !*v) {
 320                 /* Computer says no */
 321                 return;
 322         }
 323
 324         if (_audio.isStreamOpen()) {
 325                 _audio.setStreamTime (_video_view->position().seconds());
 326                 _audio.startStream ();
 327         }
 328
 329         _playing = true;
 330         _dropped = 0;
 331         _video_view->start ();
 332         Started (position());
 333 }
 334
 335 bool
 336 FilmViewer::stop ()
 337 {
 338         if (_audio.isStreamRunning()) {
 339                 /* stop stream and discard any remaining queued samples */
 340                 _audio.abortStream ();
 341         }
 342
 343         if (!_playing) {
 344                 return false;
 345         }
 346
 347         _playing = false;
 348         Stopped (position());
 349         return true;
 350 }
 351
 352 void
 353 FilmViewer::player_change (ChangeType type, int property, bool frequent)
 354 {
 355         if (type != CHANGE_TYPE_DONE || frequent) {
 356                 return;
 357         }
 358
 359         if (_coalesce_player_changes) {
 360                 _pending_player_changes.push_back (property);
 361                 return;
 362         }
 363
 364         calculate_sizes ();
 365         bool refreshed = false;
 366         if (
 367                 property == VideoContentProperty::CROP ||
 368                 property == VideoContentProperty::SCALE ||
 369                 property == VideoContentProperty::FADE_IN ||
 370                 property == VideoContentProperty::FADE_OUT ||
 371                 property == VideoContentProperty::COLOUR_CONVERSION ||
 372                 property == PlayerProperty::VIDEO_CONTAINER_SIZE ||
 373                 property == PlayerProperty::FILM_CONTAINER
 374                 ) {
 375                 refreshed = quick_refresh ();
 376         }
 377
 378         if (!refreshed) {
 379                 slow_refresh ();
 380         }
 381 }
 382
 383 void
 384 FilmViewer::film_change (ChangeType type, Film::Property p)
 385 {
 386         if (type == CHANGE_TYPE_DONE && p == Film::AUDIO_CHANNELS) {
 387                 recreate_butler ();
 388         }
 389 }
 390
 391 /** Re-get the current frame slowly by seeking */
 392 void
 393 FilmViewer::slow_refresh ()
 394 {
 395         seek (_video_view->position(), true);
 396 }
 397
 398 /** Try to re-get the current frame quickly by resetting the metadata
 399  *  in the PlayerVideo that we used last time.
 400  *  @return true if this was possible, false if not.
 401  */
 402 bool
 403 FilmViewer::quick_refresh ()
 404 {
 405         if (!_video_view->_player_video.first) {
 406                 return false;
 407         }
 408
 409         if (!_video_view->_player_video.first->reset_metadata (_film, _player->video_container_size(), _film->frame_size())) {
 410                 return false;
 411         }
 412
 413         _video_view->display_player_video ();
 414         return true;
 415 }
 416
 417 void
 418 FilmViewer::seek (shared_ptr<Content> content, ContentTime t, bool accurate)
 419 {
 420         optional<DCPTime> dt = _player->content_time_to_dcp (content, t);
 421         if (dt) {
 422                 seek (*dt, accurate);
 423         }
 424 }
 425
 426 void
 427 FilmViewer::set_coalesce_player_changes (bool c)
 428 {
 429         _coalesce_player_changes = c;
 430
 431         if (!c) {
 432                 BOOST_FOREACH (int i, _pending_player_changes) {
 433                         player_change (CHANGE_TYPE_DONE, i, false);
 434                 }
 435                 _pending_player_changes.clear ();
 436         }
 437 }
 438
 439 void
 440 FilmViewer::seek (DCPTime t, bool accurate)
 441 {
 442         if (!_butler) {
 443                 return;
 444         }
 445
 446         if (t < DCPTime ()) {
 447                 t = DCPTime ();
 448         }
 449
 450         if (t >= _film->length ()) {
 451                 t = _film->length ();
 452         }
 453
 454         suspend ();
 455
 456         _closed_captions_dialog->clear ();
 457         _butler->seek (t, accurate);
 458
 459         if (!_playing) {
 460                 request_idle_display_next_frame ();
 461         } else {
 462                 while (!_video_view->display_next_frame(false)) {}
 463         }
 464
 465         resume ();
 466 }
 467
 468 void
 469 FilmViewer::config_changed (Config::Property p)
 470 {
 471 #ifdef DCPOMATIC_VARIANT_SWAROOP
 472         if (p == Config::PLAYER_BACKGROUND_IMAGE) {
 473                 refresh_view ();
 474                 return;
 475         }
 476 #endif
 477
 478         if (p == Config::AUDIO_MAPPING) {
 479                 recreate_butler ();
 480                 return;
 481         }
 482
 483         if (p != Config::SOUND && p != Config::SOUND_OUTPUT) {
 484                 return;
 485         }
 486
 487         if (_audio.isStreamOpen ()) {
 488                 _audio.closeStream ();
 489         }
 490
 491         if (Config::instance()->sound() && _audio.getDeviceCount() > 0) {
 492                 unsigned int st = 0;
 493                 if (Config::instance()->sound_output()) {
 494                         while (st < _audio.getDeviceCount()) {
 495                                 if (_audio.getDeviceInfo(st).name == Config::instance()->sound_output().get()) {
 496                                         break;
 497                                 }
 498                                 ++st;
 499                         }
 500                         if (st == _audio.getDeviceCount()) {
 501                                 st = _audio.getDefaultOutputDevice();
 502                         }
 503                 } else {
 504                         st = _audio.getDefaultOutputDevice();
 505                 }
 506
 507                 _audio_channels = _audio.getDeviceInfo(st).outputChannels;
 508
 509                 RtAudio::StreamParameters sp;
 510                 sp.deviceId = st;
 511                 sp.nChannels = _audio_channels;
 512                 sp.firstChannel = 0;
 513                 try {
 514                         _audio.openStream (&sp, 0, RTAUDIO_FLOAT32, 48000, &_audio_block_size, &rtaudio_callback, this);
 515 #ifdef DCPOMATIC_USE_RTERROR
 516                 } catch (RtError& e) {
 517 #else
 518                 } catch (RtAudioError& e) {
 519 #endif
 520                         error_dialog (
 521                                 _video_view->get(),
 522                                 _("Could not set up audio output.  There will be no audio during the preview."), std_to_wx(e.what())
 523                                 );
 524                 }
 525                 recreate_butler ();
 526
 527         } else {
 528                 _audio_channels = 0;
 529                 recreate_butler ();
 530         }
 531 }
 532
 533 DCPTime
 534 FilmViewer::uncorrected_time () const
 535 {
 536         if (_audio.isStreamRunning ()) {
 537                 return DCPTime::from_seconds (const_cast<RtAudio*>(&_audio)->getStreamTime());
 538         }
 539
 540         return _video_view->position();
 541 }
 542
 543 DCPTime
 544 FilmViewer::time () const
 545 {
 546         if (_audio.isStreamRunning ()) {
 547                 return DCPTime::from_seconds (const_cast<RtAudio*>(&_audio)->getStreamTime ()) -
 548                         DCPTime::from_frames (average_latency(), _film->audio_frame_rate());
 549         }
 550
 551         return _video_view->position();
 552 }
 553
 554 int
 555 FilmViewer::audio_callback (void* out_p, unsigned int frames)
 556 {
 557         while (true) {
 558                 optional<DCPTime> t = _butler->get_audio (reinterpret_cast<float*> (out_p), frames);
 559                 if (!t || DCPTime(uncorrected_time() - *t) < one_video_frame()) {
 560                         /* There was an underrun or this audio is on time; carry on */
 561                         break;
 562                 }
 563                 /* The audio we just got was (very) late; drop it and get some more. */
 564         }
 565
 566         boost::mutex::scoped_lock lm (_latency_history_mutex, boost::try_to_lock);
 567         if (lm) {
 568                 _latency_history.push_back (_audio.getStreamLatency ());
 569                 if (_latency_history.size() > static_cast<size_t> (_latency_history_count)) {
 570                         _latency_history.pop_front ();
 571                 }
 572         }
 573
 574         return 0;
 575 }
 576
 577 Frame
 578 FilmViewer::average_latency () const
 579 {
 580         boost::mutex::scoped_lock lm (_latency_history_mutex);
 581         if (_latency_history.empty()) {
 582                 return 0;
 583         }
 584
 585         Frame total = 0;
 586         BOOST_FOREACH (Frame i, _latency_history) {
 587                 total += i;
 588         }
 589
 590         return total / _latency_history.size();
 591 }
 592
 593 void
 594 FilmViewer::set_dcp_decode_reduction (optional<int> reduction)
 595 {
 596         _dcp_decode_reduction = reduction;
 597         if (_player) {
 598                 _player->set_dcp_decode_reduction (reduction);
 599         }
 600 }
 601
 602 optional<int>
 603 FilmViewer::dcp_decode_reduction () const
 604 {
 605         return _dcp_decode_reduction;
 606 }
 607
 608 DCPTime
 609 FilmViewer::one_video_frame () const
 610 {
 611         return DCPTime::from_frames (1, _film ? _film->video_frame_rate() : 24);
 612 }
 613
 614 /** Open a dialog box showing our film's closed captions */
 615 void
 616 FilmViewer::show_closed_captions ()
 617 {
 618         _closed_captions_dialog->Show();
 619 }
 620
 621 void
 622 FilmViewer::seek_by (DCPTime by, bool accurate)
 623 {
 624         seek (_video_view->position() + by, accurate);
 625 }
 626
 627 void
 628 FilmViewer::set_pad_black (bool p)
 629 {
 630         _pad_black = p;
 631 }
 632
 633 /* XXX_b: comment */
 634 int
 635 FilmViewer::time_until_next_frame () const
 636 {
 637         DCPTime const next = position() + one_video_frame();
 638         std::cout << to_string(next) << " " << to_string(time()) << " " << ((next.seconds() - time().seconds()) * 1000) << "\n";
 639         if (next < time()) {
 640                 return 0;
 641         }
 642         return (next.seconds() - time().seconds()) * 1000;
 643 }