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