src/wx/film_viewer.cc

   1 /*
   2     Copyright (C) 2012-2017 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 /** @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 "lib/film.h"
  31 #include "lib/ratio.h"
  32 #include "lib/util.h"
  33 #include "lib/job_manager.h"
  34 #include "lib/image.h"
  35 #include "lib/exceptions.h"
  36 #include "lib/examine_content_job.h"
  37 #include "lib/filter.h"
  38 #include "lib/player.h"
  39 #include "lib/player_video.h"
  40 #include "lib/video_content.h"
  41 #include "lib/video_decoder.h"
  42 #include "lib/timer.h"
  43 #include "lib/butler.h"
  44 #include "lib/log.h"
  45 #include "lib/config.h"
  46 extern "C" {
  47 #include <libavutil/pixfmt.h>
  48 }
  49 #include <dcp/exceptions.h>
  50 #include <wx/tglbtn.h>
  51 #include <iostream>
  52 #include <iomanip>
  53
  54 using std::string;
  55 using std::pair;
  56 using std::min;
  57 using std::max;
  58 using std::cout;
  59 using std::list;
  60 using std::bad_alloc;
  61 using std::make_pair;
  62 using std::exception;
  63 using boost::shared_ptr;
  64 using boost::dynamic_pointer_cast;
  65 using boost::weak_ptr;
  66 using boost::optional;
  67 using dcp::Size;
  68
  69 static
  70 int
  71 rtaudio_callback (void* out, void *, unsigned int frames, double, RtAudioStreamStatus, void* data)
  72 {
  73         return reinterpret_cast<FilmViewer*>(data)->audio_callback (out, frames);
  74 }
  75
  76 FilmViewer::FilmViewer (wxWindow* p, bool outline_content, bool jump_to_selected)
  77         : wxPanel (p)
  78         , _panel (new wxPanel (this))
  79         , _outline_content (0)
  80         , _eye (0)
  81         , _jump_to_selected (0)
  82         , _slider (new wxSlider (this, wxID_ANY, 0, 0, 4096))
  83         , _rewind_button (new wxButton (this, wxID_ANY, wxT("|<")))
  84         , _back_button (new wxButton (this, wxID_ANY, wxT("<")))
  85         , _forward_button (new wxButton (this, wxID_ANY, wxT(">")))
  86         , _frame_number (new wxStaticText (this, wxID_ANY, wxT("")))
  87         , _timecode (new wxStaticText (this, wxID_ANY, wxT("")))
  88         , _play_button (new wxToggleButton (this, wxID_ANY, _("Play")))
  89         , _coalesce_player_changes (false)
  90         , _slider_being_moved (false)
  91         , _was_running_before_slider (false)
  92         , _audio (DCPOMATIC_RTAUDIO_API)
  93         , _audio_channels (0)
  94         , _audio_block_size (1024)
  95         , _playing (false)
  96         , _latency_history_count (0)
  97         , _dropped (0)
  98         , _closed_captions_dialog (new ClosedCaptionsDialog(GetParent()))
  99 {
 100 #ifndef __WXOSX__
 101         _panel->SetDoubleBuffered (true);
 102 #endif
 103
 104         _panel->SetBackgroundStyle (wxBG_STYLE_PAINT);
 105
 106         _v_sizer = new wxBoxSizer (wxVERTICAL);
 107         SetSizer (_v_sizer);
 108
 109         _v_sizer->Add (_panel, 1, wxEXPAND);
 110
 111         wxBoxSizer* view_options = new wxBoxSizer (wxHORIZONTAL);
 112         if (outline_content) {
 113                 _outline_content = new wxCheckBox (this, wxID_ANY, _("Outline content"));
 114                 view_options->Add (_outline_content, 0, wxRIGHT | wxALIGN_CENTER_VERTICAL, DCPOMATIC_SIZER_GAP);
 115         }
 116
 117         _eye = new wxChoice (this, wxID_ANY);
 118         _eye->Append (_("Left"));
 119         _eye->Append (_("Right"));
 120         _eye->SetSelection (0);
 121         view_options->Add (_eye, 0, wxLEFT | wxRIGHT | wxALIGN_CENTER_VERTICAL, DCPOMATIC_SIZER_GAP);
 122
 123         if (jump_to_selected) {
 124                 _jump_to_selected = new wxCheckBox (this, wxID_ANY, _("Jump to selected content"));
 125                 view_options->Add (_jump_to_selected, 0, wxLEFT | wxRIGHT | wxALIGN_CENTER_VERTICAL, DCPOMATIC_SIZER_GAP);
 126         }
 127
 128         _v_sizer->Add (view_options, 0, wxALL, DCPOMATIC_SIZER_GAP);
 129
 130         wxBoxSizer* h_sizer = new wxBoxSizer (wxHORIZONTAL);
 131
 132         wxBoxSizer* time_sizer = new wxBoxSizer (wxVERTICAL);
 133         time_sizer->Add (_frame_number, 0, wxEXPAND);
 134         time_sizer->Add (_timecode, 0, wxEXPAND);
 135
 136         h_sizer->Add (_rewind_button, 0, wxALL, 2);
 137         h_sizer->Add (_back_button, 0, wxALL, 2);
 138         h_sizer->Add (time_sizer, 0, wxEXPAND);
 139         h_sizer->Add (_forward_button, 0, wxALL, 2);
 140         h_sizer->Add (_play_button, 0, wxEXPAND);
 141         h_sizer->Add (_slider, 1, wxEXPAND);
 142
 143         _v_sizer->Add (h_sizer, 0, wxEXPAND | wxALL, 6);
 144
 145         _frame_number->SetMinSize (wxSize (84, -1));
 146         _rewind_button->SetMinSize (wxSize (32, -1));
 147         _back_button->SetMinSize (wxSize (32, -1));
 148         _forward_button->SetMinSize (wxSize (32, -1));
 149
 150         _panel->Bind            (wxEVT_PAINT,               boost::bind (&FilmViewer::paint_panel,     this));
 151         _panel->Bind            (wxEVT_SIZE,                boost::bind (&FilmViewer::panel_sized,     this, _1));
 152         if (_outline_content) {
 153                 _outline_content->Bind  (wxEVT_CHECKBOX,    boost::bind (&FilmViewer::refresh_panel,   this));
 154         }
 155         _eye->Bind              (wxEVT_CHOICE,              boost::bind (&FilmViewer::slow_refresh,    this));
 156         _slider->Bind           (wxEVT_SCROLL_THUMBTRACK,   boost::bind (&FilmViewer::slider_moved,    this, false));
 157         _slider->Bind           (wxEVT_SCROLL_PAGEUP,       boost::bind (&FilmViewer::slider_moved,    this, true));
 158         _slider->Bind           (wxEVT_SCROLL_PAGEDOWN,     boost::bind (&FilmViewer::slider_moved,    this, true));
 159         _slider->Bind           (wxEVT_SCROLL_THUMBRELEASE, boost::bind (&FilmViewer::slider_released, this));
 160         _play_button->Bind      (wxEVT_TOGGLEBUTTON,        boost::bind (&FilmViewer::play_clicked,    this));
 161         _timer.Bind             (wxEVT_TIMER,               boost::bind (&FilmViewer::timer,           this));
 162         _rewind_button->Bind    (wxEVT_LEFT_DOWN,           boost::bind (&FilmViewer::rewind_clicked,  this, _1));
 163         _back_button->Bind      (wxEVT_LEFT_DOWN,           boost::bind (&FilmViewer::back_clicked,    this, _1));
 164         _forward_button->Bind   (wxEVT_LEFT_DOWN,           boost::bind (&FilmViewer::forward_clicked, this, _1));
 165         _frame_number->Bind     (wxEVT_LEFT_DOWN,           boost::bind (&FilmViewer::frame_number_clicked, this));
 166         _timecode->Bind         (wxEVT_LEFT_DOWN,           boost::bind (&FilmViewer::timecode_clicked, this));
 167         if (_jump_to_selected) {
 168                 _jump_to_selected->Bind (wxEVT_CHECKBOX, boost::bind (&FilmViewer::jump_to_selected_clicked, this));
 169                 _jump_to_selected->SetValue (Config::instance()->jump_to_selected ());
 170         }
 171
 172         set_film (shared_ptr<Film> ());
 173
 174         JobManager::instance()->ActiveJobsChanged.connect (
 175                 bind (&FilmViewer::active_jobs_changed, this, _2)
 176                 );
 177
 178         setup_sensitivity ();
 179
 180         _config_changed_connection = Config::instance()->Changed.connect (bind (&FilmViewer::config_changed, this, _1));
 181         config_changed (Config::SOUND_OUTPUT);
 182 }
 183
 184 FilmViewer::~FilmViewer ()
 185 {
 186         stop ();
 187 }
 188
 189 void
 190 FilmViewer::set_film (shared_ptr<Film> film)
 191 {
 192         if (_film == film) {
 193                 return;
 194         }
 195
 196         _film = film;
 197
 198         _frame.reset ();
 199         _closed_captions_dialog->clear ();
 200
 201         update_position_slider ();
 202         update_position_label ();
 203
 204         if (!_film) {
 205                 _player.reset ();
 206                 _closed_captions_dialog->set_player (_player);
 207                 recreate_butler ();
 208                 _frame.reset ();
 209                 refresh_panel ();
 210                 return;
 211         }
 212
 213         try {
 214                 _player.reset (new Player (_film, _film->playlist ()));
 215                 _player->set_fast ();
 216                 if (_dcp_decode_reduction) {
 217                         _player->set_dcp_decode_reduction (_dcp_decode_reduction);
 218                 }
 219         } catch (bad_alloc) {
 220                 error_dialog (this, _("There is not enough free memory to do that."));
 221                 _film.reset ();
 222                 return;
 223         }
 224
 225         _closed_captions_dialog->set_player (_player);
 226
 227         _player->set_always_burn_open_subtitles ();
 228         _player->set_play_referenced ();
 229
 230         _film->Changed.connect (boost::bind (&FilmViewer::film_changed, this, _1));
 231         _player->Changed.connect (boost::bind (&FilmViewer::player_changed, this, _1, _2));
 232
 233         /* Keep about 1 second's worth of history samples */
 234         _latency_history_count = _film->audio_frame_rate() / _audio_block_size;
 235
 236         recreate_butler ();
 237
 238         calculate_sizes ();
 239         slow_refresh ();
 240
 241         setup_sensitivity ();
 242 }
 243
 244 void
 245 FilmViewer::recreate_butler ()
 246 {
 247         bool const was_running = stop ();
 248         _butler.reset ();
 249
 250         if (!_film) {
 251                 return;
 252         }
 253
 254         AudioMapping map = AudioMapping (_film->audio_channels(), _audio_channels);
 255
 256         if (_audio_channels != 2 || _film->audio_channels() < 3) {
 257                 for (int i = 0; i < min (_film->audio_channels(), _audio_channels); ++i) {
 258                         map.set (i, i, 1);
 259                 }
 260         } else {
 261                 /* Special case: stereo output, at least 3 channel input.
 262                    Map so that Lt = L(-3dB) + Ls(-3dB) + C(-6dB) + Lfe(-10dB)
 263                                Rt = R(-3dB) + Rs(-3dB) + C(-6dB) + Lfe(-10dB)
 264                 */
 265                 map.set (dcp::LEFT,   0, 1 / sqrt(2)); // L -> Lt
 266                 map.set (dcp::RIGHT,  1, 1 / sqrt(2)); // R -> Rt
 267                 map.set (dcp::CENTRE, 0, 1 / 2.0); // C -> Lt
 268                 map.set (dcp::CENTRE, 1, 1 / 2.0); // C -> Rt
 269                 map.set (dcp::LFE,    0, 1 / sqrt(10)); // Lfe -> Lt
 270                 map.set (dcp::LFE,    1, 1 / sqrt(10)); // Lfe -> Rt
 271                 map.set (dcp::LS,     0, 1 / sqrt(2)); // Ls -> Lt
 272                 map.set (dcp::RS,     1, 1 / sqrt(2)); // Rs -> Rt
 273         }
 274
 275         _butler.reset (new Butler (_player, _film->log(), map, _audio_channels));
 276         if (!Config::instance()->sound() && !_audio.isStreamOpen()) {
 277                 _butler->disable_audio ();
 278         }
 279
 280         if (was_running) {
 281                 start ();
 282         }
 283 }
 284
 285 void
 286 FilmViewer::refresh_panel ()
 287 {
 288         _panel->Refresh ();
 289         _panel->Update ();
 290 }
 291
 292 void
 293 FilmViewer::get ()
 294 {
 295         DCPOMATIC_ASSERT (_butler);
 296
 297         do {
 298                 _player_video = _butler->get_video ();
 299         } while (
 300                 _film->three_d() &&
 301                 ((_eye->GetSelection() == 0 && _player_video.first->eyes() == EYES_RIGHT) || (_eye->GetSelection() == 1 && _player_video.first->eyes() == EYES_LEFT))
 302                 );
 303
 304         _butler->rethrow ();
 305
 306         display_player_video ();
 307 }
 308
 309 void
 310 FilmViewer::display_player_video ()
 311 {
 312         if (!_player_video.first) {
 313                 _frame.reset ();
 314                 refresh_panel ();
 315                 return;
 316         }
 317
 318         if (_playing && (time() - _player_video.second) > one_video_frame()) {
 319                 /* Too late; just drop this frame before we try to get its image (which will be the time-consuming
 320                    part if this frame is J2K).
 321                 */
 322                 _video_position = _player_video.second;
 323                 ++_dropped;
 324                 return;
 325         }
 326
 327         /* In an ideal world, what we would do here is:
 328          *
 329          * 1. convert to XYZ exactly as we do in the DCP creation path.
 330          * 2. convert back to RGB for the preview display, compensating
 331          *    for the monitor etc. etc.
 332          *
 333          * but this is inefficient if the source is RGB.  Since we don't
 334          * (currently) care too much about the precise accuracy of the preview's
 335          * colour mapping (and we care more about its speed) we try to short-
 336          * circuit this "ideal" situation in some cases.
 337          *
 338          * The content's specified colour conversion indicates the colourspace
 339          * which the content is in (according to the user).
 340          *
 341          * PlayerVideo::image (bound to PlayerVideo::always_rgb) will take the source
 342          * image and convert it (from whatever the user has said it is) to RGB.
 343          */
 344
 345         _frame = _player_video.first->image (
 346                 bind (&Log::dcp_log, _film->log().get(), _1, _2),
 347                 bind (&PlayerVideo::always_rgb, _1),
 348                 false, true
 349                 );
 350
 351         ImageChanged (_player_video.first);
 352
 353         _video_position = _player_video.second;
 354         _inter_position = _player_video.first->inter_position ();
 355         _inter_size = _player_video.first->inter_size ();
 356
 357         refresh_panel ();
 358
 359         _closed_captions_dialog->update (time());
 360 }
 361
 362 void
 363 FilmViewer::timer ()
 364 {
 365         if (!_film || !_playing) {
 366                 return;
 367         }
 368
 369         get ();
 370         update_position_label ();
 371         update_position_slider ();
 372         DCPTime const next = _video_position + one_video_frame();
 373
 374         if (next >= _film->length()) {
 375                 stop ();
 376         }
 377
 378         _timer.Start (max ((next.seconds() - time().seconds()) * 1000, 1.0), wxTIMER_ONE_SHOT);
 379
 380         if (_butler) {
 381                 _butler->rethrow ();
 382         }
 383 }
 384
 385 void
 386 FilmViewer::paint_panel ()
 387 {
 388         wxPaintDC dc (_panel);
 389
 390         if (!_frame || !_film || !_out_size.width || !_out_size.height || _out_size != _frame->size()) {
 391                 dc.Clear ();
 392                 return;
 393         }
 394
 395         wxImage frame (_out_size.width, _out_size.height, _frame->data()[0], true);
 396         wxBitmap frame_bitmap (frame);
 397         dc.DrawBitmap (frame_bitmap, 0, 0);
 398
 399         if (_out_size.width < _panel_size.width) {
 400                 wxPen p (GetBackgroundColour ());
 401                 wxBrush b (GetBackgroundColour ());
 402                 dc.SetPen (p);
 403                 dc.SetBrush (b);
 404                 dc.DrawRectangle (_out_size.width, 0, _panel_size.width - _out_size.width, _panel_size.height);
 405         }
 406
 407         if (_out_size.height < _panel_size.height) {
 408                 wxPen p (GetBackgroundColour ());
 409                 wxBrush b (GetBackgroundColour ());
 410                 dc.SetPen (p);
 411                 dc.SetBrush (b);
 412                 dc.DrawRectangle (0, _out_size.height, _panel_size.width, _panel_size.height - _out_size.height);
 413         }
 414
 415         if (_outline_content && _outline_content->GetValue ()) {
 416                 wxPen p (wxColour (255, 0, 0), 2);
 417                 dc.SetPen (p);
 418                 dc.SetBrush (*wxTRANSPARENT_BRUSH);
 419                 dc.DrawRectangle (_inter_position.x, _inter_position.y, _inter_size.width, _inter_size.height);
 420         }
 421 }
 422
 423 /** @param page true if this was a PAGEUP/PAGEDOWN event for which we won't receive a THUMBRELEASE */
 424 void
 425 FilmViewer::slider_moved (bool page)
 426 {
 427         if (!_film) {
 428                 return;
 429         }
 430
 431         if (!page && !_slider_being_moved) {
 432                 /* This is the first event of a drag; stop playback for the duration of the drag */
 433                 _was_running_before_slider = stop ();
 434                 _slider_being_moved = true;
 435         }
 436
 437         DCPTime t (_slider->GetValue() * _film->length().get() / 4096);
 438         t = t.round (_film->video_frame_rate());
 439         /* Ensure that we hit the end of the film at the end of the slider */
 440         if (t >= _film->length ()) {
 441                 t = _film->length() - one_video_frame();
 442         }
 443         seek (t, false);
 444         update_position_label ();
 445 }
 446
 447 void
 448 FilmViewer::slider_released ()
 449 {
 450         if (_was_running_before_slider) {
 451                 /* Restart after a drag */
 452                 start ();
 453         }
 454         _slider_being_moved = false;
 455 }
 456
 457 void
 458 FilmViewer::panel_sized (wxSizeEvent& ev)
 459 {
 460         _panel_size.width = ev.GetSize().GetWidth();
 461         _panel_size.height = ev.GetSize().GetHeight();
 462
 463         calculate_sizes ();
 464         if (!quick_refresh()) {
 465                 slow_refresh ();
 466         }
 467         update_position_label ();
 468         update_position_slider ();
 469 }
 470
 471 void
 472 FilmViewer::calculate_sizes ()
 473 {
 474         if (!_film || !_player) {
 475                 return;
 476         }
 477
 478         Ratio const * container = _film->container ();
 479
 480         float const panel_ratio = _panel_size.ratio ();
 481         float const film_ratio = container ? container->ratio () : 1.78;
 482
 483         if (panel_ratio < film_ratio) {
 484                 /* panel is less widscreen than the film; clamp width */
 485                 _out_size.width = _panel_size.width;
 486                 _out_size.height = lrintf (_out_size.width / film_ratio);
 487         } else {
 488                 /* panel is more widescreen than the film; clamp height */
 489                 _out_size.height = _panel_size.height;
 490                 _out_size.width = lrintf (_out_size.height * film_ratio);
 491         }
 492
 493         /* Catch silly values */
 494         _out_size.width = max (64, _out_size.width);
 495         _out_size.height = max (64, _out_size.height);
 496
 497         _player->set_video_container_size (_out_size);
 498 }
 499
 500 void
 501 FilmViewer::play_clicked ()
 502 {
 503         check_play_state ();
 504 }
 505
 506 void
 507 FilmViewer::check_play_state ()
 508 {
 509         if (!_film || _film->video_frame_rate() == 0) {
 510                 return;
 511         }
 512
 513         if (_play_button->GetValue()) {
 514                 start ();
 515         } else {
 516                 stop ();
 517         }
 518 }
 519
 520 void
 521 FilmViewer::start ()
 522 {
 523         if (!_film) {
 524                 return;
 525         }
 526
 527         if (_audio.isStreamOpen()) {
 528                 _audio.setStreamTime (_video_position.seconds());
 529                 _audio.startStream ();
 530         }
 531
 532         cout << "start playback at " << to_string(_video_position) << "\n";
 533
 534         _playing = true;
 535         _dropped = 0;
 536         timer ();
 537         _play_button->SetValue (true);
 538 }
 539
 540 bool
 541 FilmViewer::stop ()
 542 {
 543         if (_audio.isStreamRunning()) {
 544                 /* stop stream and discard any remaining queued samples */
 545                 _audio.abortStream ();
 546         }
 547
 548         if (!_playing) {
 549                 return false;
 550         }
 551
 552         _playing = false;
 553         _play_button->SetValue (false);
 554         return true;
 555 }
 556
 557 void
 558 FilmViewer::update_position_slider ()
 559 {
 560         if (!_film) {
 561                 _slider->SetValue (0);
 562                 return;
 563         }
 564
 565         DCPTime const len = _film->length ();
 566
 567         if (len.get ()) {
 568                 int const new_slider_position = 4096 * _video_position.get() / len.get();
 569                 if (new_slider_position != _slider->GetValue()) {
 570                         _slider->SetValue (new_slider_position);
 571                 }
 572         }
 573 }
 574
 575 void
 576 FilmViewer::update_position_label ()
 577 {
 578         if (!_film) {
 579                 _frame_number->SetLabel ("0");
 580                 _timecode->SetLabel ("0:0:0.0");
 581                 return;
 582         }
 583
 584         double const fps = _film->video_frame_rate ();
 585         /* Count frame number from 1 ... not sure if this is the best idea */
 586         _frame_number->SetLabel (wxString::Format (wxT("%ld"), lrint (_video_position.seconds() * fps) + 1));
 587         _timecode->SetLabel (time_to_timecode (_video_position, fps));
 588 }
 589
 590 void
 591 FilmViewer::active_jobs_changed (optional<string> j)
 592 {
 593         /* examine content is the only job which stops the viewer working */
 594         bool const a = !j || *j != "examine_content";
 595         _slider->Enable (a);
 596         _play_button->Enable (a);
 597 }
 598
 599 DCPTime
 600 FilmViewer::nudge_amount (wxKeyboardState& ev)
 601 {
 602         DCPTime amount = one_video_frame ();
 603
 604         if (ev.ShiftDown() && !ev.ControlDown()) {
 605                 amount = DCPTime::from_seconds (1);
 606         } else if (!ev.ShiftDown() && ev.ControlDown()) {
 607                 amount = DCPTime::from_seconds (10);
 608         } else if (ev.ShiftDown() && ev.ControlDown()) {
 609                 amount = DCPTime::from_seconds (60);
 610         }
 611
 612         return amount;
 613 }
 614
 615 void
 616 FilmViewer::go_to (DCPTime t)
 617 {
 618         if (t < DCPTime ()) {
 619                 t = DCPTime ();
 620         }
 621
 622         if (t >= _film->length ()) {
 623                 t = _film->length ();
 624         }
 625
 626         seek (t, true);
 627         update_position_label ();
 628         update_position_slider ();
 629 }
 630
 631 void
 632 FilmViewer::rewind_clicked (wxMouseEvent& ev)
 633 {
 634         go_to(DCPTime());
 635         ev.Skip();
 636 }
 637
 638 void
 639 FilmViewer::back_frame ()
 640 {
 641         if (!_film) {
 642                 return;
 643         }
 644
 645         go_to (_video_position - one_video_frame());
 646 }
 647
 648 void
 649 FilmViewer::forward_frame ()
 650 {
 651         if (!_film) {
 652                 return;
 653         }
 654
 655         go_to (_video_position + one_video_frame());
 656 }
 657
 658 void
 659 FilmViewer::back_clicked (wxKeyboardState& ev)
 660 {
 661         go_to (_video_position - nudge_amount (ev));
 662 }
 663
 664 void
 665 FilmViewer::forward_clicked (wxKeyboardState& ev)
 666 {
 667         go_to (_video_position + nudge_amount (ev));
 668 }
 669
 670 void
 671 FilmViewer::player_changed (int property, bool frequent)
 672 {
 673         if (frequent) {
 674                 return;
 675         }
 676
 677         if (_coalesce_player_changes) {
 678                 _pending_player_changes.push_back (property);
 679                 return;
 680         }
 681
 682         calculate_sizes ();
 683         bool refreshed = false;
 684         if (
 685                 property == VideoContentProperty::CROP ||
 686                 property == VideoContentProperty::SCALE ||
 687                 property == VideoContentProperty::FADE_IN ||
 688                 property == VideoContentProperty::FADE_OUT ||
 689                 property == VideoContentProperty::COLOUR_CONVERSION ||
 690                 property == PlayerProperty::VIDEO_CONTAINER_SIZE ||
 691                 property == PlayerProperty::FILM_CONTAINER
 692                 ) {
 693                 refreshed = quick_refresh ();
 694         }
 695
 696         if (!refreshed) {
 697                 slow_refresh ();
 698         }
 699         update_position_label ();
 700         update_position_slider ();
 701 }
 702
 703 void
 704 FilmViewer::setup_sensitivity ()
 705 {
 706         bool const c = _film && !_film->content().empty ();
 707
 708         _slider->Enable (c);
 709         _rewind_button->Enable (c);
 710         _back_button->Enable (c);
 711         _forward_button->Enable (c);
 712         _play_button->Enable (c);
 713         if (_outline_content) {
 714                 _outline_content->Enable (c);
 715         }
 716         _frame_number->Enable (c);
 717         _timecode->Enable (c);
 718         if (_jump_to_selected) {
 719                 _jump_to_selected->Enable (c);
 720         }
 721
 722         _eye->Enable (c && _film->three_d ());
 723 }
 724
 725 void
 726 FilmViewer::film_changed (Film::Property p)
 727 {
 728         if (p == Film::CONTENT || p == Film::THREE_D) {
 729                 setup_sensitivity ();
 730         } else if (p == Film::AUDIO_CHANNELS) {
 731                 recreate_butler ();
 732         }
 733 }
 734
 735 /** Re-get the current frame slowly by seeking */
 736 void
 737 FilmViewer::slow_refresh ()
 738 {
 739         seek (_video_position, true);
 740 }
 741
 742 /** Try to re-get the current frame quickly by resetting the metadata
 743  *  in the PlayerVideo that we used last time.
 744  *  @return true if this was possible, false if not.
 745  */
 746 bool
 747 FilmViewer::quick_refresh ()
 748 {
 749         if (!_player_video.first) {
 750                 return false;
 751         }
 752
 753         if (!_player_video.first->reset_metadata (_player->video_container_size(), _film->frame_size())) {
 754                 return false;
 755         }
 756
 757         display_player_video ();
 758         return true;
 759 }
 760
 761 void
 762 FilmViewer::set_position (DCPTime p)
 763 {
 764         _video_position = p;
 765         seek (p, true);
 766         update_position_label ();
 767         update_position_slider ();
 768 }
 769
 770 void
 771 FilmViewer::set_position (shared_ptr<Content> content, ContentTime t)
 772 {
 773         set_position (_player->content_time_to_dcp (content, t));
 774 }
 775
 776 void
 777 FilmViewer::set_coalesce_player_changes (bool c)
 778 {
 779         _coalesce_player_changes = c;
 780
 781         if (!c) {
 782                 BOOST_FOREACH (int i, _pending_player_changes) {
 783                         player_changed (i, false);
 784                 }
 785                 _pending_player_changes.clear ();
 786         }
 787 }
 788
 789 void
 790 FilmViewer::timecode_clicked ()
 791 {
 792         PlayheadToTimecodeDialog* dialog = new PlayheadToTimecodeDialog (this, _film->video_frame_rate ());
 793         if (dialog->ShowModal() == wxID_OK) {
 794                 go_to (dialog->get ());
 795         }
 796         dialog->Destroy ();
 797 }
 798
 799 void
 800 FilmViewer::frame_number_clicked ()
 801 {
 802         PlayheadToFrameDialog* dialog = new PlayheadToFrameDialog (this, _film->video_frame_rate ());
 803         if (dialog->ShowModal() == wxID_OK) {
 804                 go_to (dialog->get ());
 805         }
 806         dialog->Destroy ();
 807 }
 808
 809 void
 810 FilmViewer::jump_to_selected_clicked ()
 811 {
 812         Config::instance()->set_jump_to_selected (_jump_to_selected->GetValue ());
 813 }
 814
 815 void
 816 FilmViewer::seek (DCPTime t, bool accurate)
 817 {
 818         if (!_butler) {
 819                 return;
 820         }
 821
 822         bool const was_running = stop ();
 823
 824         _closed_captions_dialog->clear ();
 825         _butler->seek (t, accurate);
 826         get ();
 827
 828         if (was_running) {
 829                 start ();
 830         }
 831 }
 832
 833 void
 834 FilmViewer::config_changed (Config::Property p)
 835 {
 836         if (p != Config::SOUND && p != Config::SOUND_OUTPUT) {
 837                 return;
 838         }
 839
 840         if (_audio.isStreamOpen ()) {
 841                 _audio.closeStream ();
 842         }
 843
 844         if (Config::instance()->sound() && _audio.getDeviceCount() > 0) {
 845                 unsigned int st = 0;
 846                 if (Config::instance()->sound_output()) {
 847                         while (st < _audio.getDeviceCount()) {
 848                                 if (_audio.getDeviceInfo(st).name == Config::instance()->sound_output().get()) {
 849                                         break;
 850                                 }
 851                                 ++st;
 852                         }
 853                         if (st == _audio.getDeviceCount()) {
 854                                 st = _audio.getDefaultOutputDevice();
 855                         }
 856                 } else {
 857                         st = _audio.getDefaultOutputDevice();
 858                 }
 859
 860                 _audio_channels = _audio.getDeviceInfo(st).outputChannels;
 861
 862                 RtAudio::StreamParameters sp;
 863                 sp.deviceId = st;
 864                 sp.nChannels = _audio_channels;
 865                 sp.firstChannel = 0;
 866                 try {
 867                         _audio.openStream (&sp, 0, RTAUDIO_FLOAT32, 48000, &_audio_block_size, &rtaudio_callback, this);
 868 #ifdef DCPOMATIC_USE_RTERROR
 869                 } catch (RtError& e) {
 870 #else
 871                 } catch (RtAudioError& e) {
 872 #endif
 873                         error_dialog (
 874                                 this,
 875                                 _("Could not set up audio output.  There will be no audio during the preview."), std_to_wx(e.what())
 876                                 );
 877                 }
 878                 recreate_butler ();
 879
 880         } else {
 881                 _audio_channels = 0;
 882                 recreate_butler ();
 883         }
 884 }
 885
 886 DCPTime
 887 FilmViewer::time () const
 888 {
 889         if (_audio.isStreamRunning ()) {
 890                 return DCPTime::from_seconds (const_cast<RtAudio*>(&_audio)->getStreamTime ()) -
 891                         DCPTime::from_frames (average_latency(), _film->audio_frame_rate());
 892         }
 893
 894         return _video_position;
 895 }
 896
 897 int
 898 FilmViewer::audio_callback (void* out_p, unsigned int frames)
 899 {
 900         _butler->get_audio (reinterpret_cast<float*> (out_p), frames);
 901
 902         boost::mutex::scoped_lock lm (_latency_history_mutex, boost::try_to_lock);
 903         if (lm) {
 904                 _latency_history.push_back (_audio.getStreamLatency ());
 905                 if (_latency_history.size() > static_cast<size_t> (_latency_history_count)) {
 906                         _latency_history.pop_front ();
 907                 }
 908         }
 909
 910         return 0;
 911 }
 912
 913 Frame
 914 FilmViewer::average_latency () const
 915 {
 916         boost::mutex::scoped_lock lm (_latency_history_mutex);
 917         if (_latency_history.empty()) {
 918                 return 0;
 919         }
 920
 921         Frame total = 0;
 922         BOOST_FOREACH (Frame i, _latency_history) {
 923                 total += i;
 924         }
 925
 926         return total / _latency_history.size();
 927 }
 928
 929 void
 930 FilmViewer::set_dcp_decode_reduction (optional<int> reduction)
 931 {
 932         _dcp_decode_reduction = reduction;
 933         if (_player) {
 934                 _player->set_dcp_decode_reduction (reduction);
 935         }
 936 }
 937
 938 optional<int>
 939 FilmViewer::dcp_decode_reduction () const
 940 {
 941         return _dcp_decode_reduction;
 942 }
 943
 944 DCPTime
 945 FilmViewer::one_video_frame () const
 946 {
 947         return DCPTime::from_frames (1, _film->video_frame_rate());
 948 }
 949
 950 void
 951 FilmViewer::show_closed_captions ()
 952 {
 953         _closed_captions_dialog->Show();
 954 }