git.sesse.net Git - nageru/blob - futatabi/mainwindow.cpp

   1 #include "mainwindow.h"
   2
   3 #include "clip_list.h"
   4 #include "export.h"
   5 #include "flags.h"
   6 #include "frame_on_disk.h"
   7 #include "player.h"
   8 #include "futatabi_midi_mapping.pb.h"
   9 #include "shared/aboutdialog.h"
  10 #include "shared/disk_space_estimator.h"
  11 #include "shared/post_to_main_thread.h"
  12 #include "shared/timebase.h"
  13 #include "ui_mainwindow.h"
  14
  15 #include <QDesktopServices>
  16 #include <QFileDialog>
  17 #include <QMessageBox>
  18 #include <QMouseEvent>
  19 #include <QNetworkReply>
  20 #include <QShortcut>
  21 #include <QTimer>
  22 #include <QWheelEvent>
  23 #include <future>
  24 #include <sqlite3.h>
  25 #include <string>
  26 #include <vector>
  27
  28 using namespace std;
  29 using namespace std::placeholders;
  30
  31 MainWindow *global_mainwindow = nullptr;
  32 static ClipList *cliplist_clips;
  33 static PlayList *playlist_clips;
  34
  35 extern int64_t current_pts;
  36
  37 namespace {
  38
  39 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
  40 {
  41         pts = std::max<int64_t>(pts, 0);
  42         if (clip->pts_out == -1) {
  43                 pts = std::min(pts, current_pts);
  44         } else {
  45                 pts = std::min(pts, clip->pts_out);
  46         }
  47         clip->pts_in = pts;
  48 }
  49
  50 }  // namespace
  51
  52 MainWindow::MainWindow()
  53         : ui(new Ui::MainWindow),
  54           db(global_flags.working_directory + "/futatabi.db"),
  55           midi_mapper(this)
  56 {
  57         global_mainwindow = this;
  58         ui->setupUi(this);
  59
  60         // Load settings from database.
  61         SettingsProto settings = db.get_settings();
  62         if (!global_flags.interpolation_quality_set) {
  63                 if (settings.interpolation_quality() != 0) {
  64                         global_flags.interpolation_quality = settings.interpolation_quality() - 1;
  65                 }
  66         }
  67         if (!global_flags.cue_point_padding_set) {
  68                 global_flags.cue_point_padding_seconds = settings.cue_point_padding_seconds();  // Default 0 is fine.
  69         }
  70         if (global_flags.interpolation_quality == 0) {
  71                 // Allocate something just for simplicity; we won't be using it
  72                 // unless the user changes runtime, in which case 1 is fine.
  73                 flow_initialized_interpolation_quality = 1;
  74         } else {
  75                 flow_initialized_interpolation_quality = global_flags.interpolation_quality;
  76         }
  77         save_settings();
  78
  79         // The menus.
  80         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  81         connect(ui->export_cliplist_clip_multitrack_action, &QAction::triggered, this, &MainWindow::export_cliplist_clip_multitrack_triggered);
  82         connect(ui->export_playlist_clip_interpolated_action, &QAction::triggered, this, &MainWindow::export_playlist_clip_interpolated_triggered);
  83         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
  84         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
  85         connect(ui->undo_action, &QAction::triggered, this, &MainWindow::undo_triggered);
  86         connect(ui->redo_action, &QAction::triggered, this, &MainWindow::redo_triggered);
  87         ui->undo_action->setEnabled(false);
  88         ui->redo_action->setEnabled(false);
  89
  90         // The quality group.
  91         QActionGroup *quality_group = new QActionGroup(ui->interpolation_menu);
  92         quality_group->addAction(ui->quality_0_action);
  93         quality_group->addAction(ui->quality_1_action);
  94         quality_group->addAction(ui->quality_2_action);
  95         quality_group->addAction(ui->quality_3_action);
  96         quality_group->addAction(ui->quality_4_action);
  97         if (global_flags.interpolation_quality == 0) {
  98                 ui->quality_0_action->setChecked(true);
  99         } else if (global_flags.interpolation_quality == 1) {
 100                 ui->quality_1_action->setChecked(true);
 101         } else if (global_flags.interpolation_quality == 2) {
 102                 ui->quality_2_action->setChecked(true);
 103         } else if (global_flags.interpolation_quality == 3) {
 104                 ui->quality_3_action->setChecked(true);
 105         } else if (global_flags.interpolation_quality == 4) {
 106                 ui->quality_4_action->setChecked(true);
 107         } else {
 108                 assert(false);
 109         }
 110         connect(ui->quality_0_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 0, _1));
 111         connect(ui->quality_1_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 1, _1));
 112         connect(ui->quality_2_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 2, _1));
 113         connect(ui->quality_3_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 3, _1));
 114         connect(ui->quality_4_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 4, _1));
 115
 116         // The cue point padding group.
 117         QActionGroup *padding_group = new QActionGroup(ui->interpolation_menu);
 118         padding_group->addAction(ui->padding_0_action);
 119         padding_group->addAction(ui->padding_1_action);
 120         padding_group->addAction(ui->padding_2_action);
 121         padding_group->addAction(ui->padding_5_action);
 122         if (global_flags.cue_point_padding_seconds <= 1e-3) {
 123                 ui->padding_0_action->setChecked(true);
 124         } else if (fabs(global_flags.cue_point_padding_seconds - 1.0) < 1e-3) {
 125                 ui->padding_1_action->setChecked(true);
 126         } else if (fabs(global_flags.cue_point_padding_seconds - 2.0) < 1e-3) {
 127                 ui->padding_2_action->setChecked(true);
 128         } else if (fabs(global_flags.cue_point_padding_seconds - 5.0) < 1e-3) {
 129                 ui->padding_5_action->setChecked(true);
 130         } else {
 131                 // Nothing to check, which is fine.
 132         }
 133         connect(ui->padding_0_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 0.0, _1));
 134         connect(ui->padding_1_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 1.0, _1));
 135         connect(ui->padding_2_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 2.0, _1));
 136         connect(ui->padding_5_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 5.0, _1));
 137
 138         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 139         disk_free_label = new QLabel(this);
 140         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 141         ui->menuBar->setCornerWidget(disk_free_label);
 142
 143         StateProto state = db.get_state();
 144         undo_stack.push_back(state);  // The undo stack always has the current state on top.
 145
 146         cliplist_clips = new ClipList(state.clip_list());
 147         ui->clip_list->setModel(cliplist_clips);
 148         connect(cliplist_clips, &ClipList::any_content_changed, this, &MainWindow::content_changed);
 149
 150         playlist_clips = new PlayList(state.play_list());
 151         ui->playlist->setModel(playlist_clips);
 152         connect(playlist_clips, &PlayList::any_content_changed, this, &MainWindow::content_changed);
 153
 154         // For un-highlighting when we lose focus.
 155         ui->clip_list->installEventFilter(this);
 156
 157         // For scrubbing in the pts columns.
 158         ui->clip_list->viewport()->installEventFilter(this);
 159         ui->playlist->viewport()->installEventFilter(this);
 160
 161         QShortcut *cue_in = new QShortcut(QKeySequence(Qt::Key_A), this);
 162         connect(cue_in, &QShortcut::activated, ui->cue_in_btn, &QPushButton::click);
 163         connect(ui->cue_in_btn, &QPushButton::clicked, this, &MainWindow::cue_in_clicked);
 164
 165         QShortcut *cue_out = new QShortcut(QKeySequence(Qt::Key_S), this);
 166         connect(cue_out, &QShortcut::activated, ui->cue_out_btn, &QPushButton::click);
 167         connect(ui->cue_out_btn, &QPushButton::clicked, this, &MainWindow::cue_out_clicked);
 168
 169         QShortcut *queue = new QShortcut(QKeySequence(Qt::Key_Q), this);
 170         connect(queue, &QShortcut::activated, ui->queue_btn, &QPushButton::click);
 171         connect(ui->queue_btn, &QPushButton::clicked, this, &MainWindow::queue_clicked);
 172
 173         QShortcut *preview = new QShortcut(QKeySequence(Qt::Key_W), this);
 174         connect(preview, &QShortcut::activated, ui->preview_btn, &QPushButton::click);
 175         connect(ui->preview_btn, &QPushButton::clicked, this, &MainWindow::preview_clicked);
 176
 177         QShortcut *play = new QShortcut(QKeySequence(Qt::Key_Space), this);
 178         connect(play, &QShortcut::activated, ui->play_btn, &QPushButton::click);
 179         connect(ui->play_btn, &QPushButton::clicked, this, &MainWindow::play_clicked);
 180
 181         connect(ui->stop_btn, &QPushButton::clicked, this, &MainWindow::stop_clicked);
 182         ui->stop_btn->setEnabled(false);
 183
 184         connect(ui->speed_slider, &QAbstractSlider::valueChanged, this, &MainWindow::speed_slider_changed);
 185         connect(ui->speed_lock_btn, &QPushButton::clicked, this, &MainWindow::speed_lock_clicked);
 186
 187         connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 188
 189         connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
 190         QShortcut *delete_key = new QShortcut(QKeySequence(Qt::Key_Delete), ui->playlist);
 191         connect(delete_key, &QShortcut::activated, [this] {
 192                 if (ui->playlist->hasFocus()) {
 193                         playlist_remove();
 194                 }
 195         });
 196
 197         // TODO: support drag-and-drop.
 198         connect(ui->playlist_move_up_btn, &QPushButton::clicked, [this] { playlist_move(-1); });
 199         connect(ui->playlist_move_down_btn, &QPushButton::clicked, [this] { playlist_move(1); });
 200
 201         connect(ui->playlist->selectionModel(), &QItemSelectionModel::selectionChanged,
 202                 this, &MainWindow::playlist_selection_changed);
 203         playlist_selection_changed();  // First time set-up.
 204
 205         preview_player.reset(new Player(ui->preview_display, Player::NO_STREAM_OUTPUT));
 206         preview_player->set_done_callback([this] {
 207                 post_to_main_thread([this] {
 208                         preview_player_done();
 209                 });
 210         });
 211
 212         live_player.reset(new Player(ui->live_display, Player::HTTPD_STREAM_OUTPUT));
 213         live_player->set_done_callback([this] {
 214                 post_to_main_thread([this] {
 215                         live_player_done();
 216                 });
 217         });
 218         live_player->set_progress_callback([this](const map<uint64_t, double> &progress, double time_remaining) {
 219                 post_to_main_thread([this, progress, time_remaining] {
 220                         live_player_clip_progress(progress, time_remaining);
 221                 });
 222         });
 223         set_output_status("paused");
 224         enable_or_disable_queue_button();
 225
 226         defer_timeout = new QTimer(this);
 227         defer_timeout->setSingleShot(true);
 228         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 229         ui->undo_action->setEnabled(true);
 230
 231         lock_blink_timeout = new QTimer(this);
 232         lock_blink_timeout->setSingleShot(true);
 233         connect(lock_blink_timeout, &QTimer::timeout, this, &MainWindow::lock_blink_timer_expired);
 234
 235         connect(ui->clip_list->selectionModel(), &QItemSelectionModel::currentChanged,
 236                 this, &MainWindow::clip_list_selection_changed);
 237         enable_or_disable_queue_button();
 238
 239         // Find out how many cameras we have in the existing frames;
 240         // if none, we start with two cameras.
 241         num_cameras = 2;
 242         {
 243                 lock_guard<mutex> lock(frame_mu);
 244                 for (size_t stream_idx = 2; stream_idx < MAX_STREAMS; ++stream_idx) {
 245                         if (!frames[stream_idx].empty()) {
 246                                 num_cameras = stream_idx + 1;
 247                         }
 248                 }
 249         }
 250         change_num_cameras();
 251
 252         if (!global_flags.tally_url.empty()) {
 253                 start_tally();
 254         }
 255
 256         if (!global_flags.midi_mapping_filename.empty()) {
 257                 MIDIMappingProto midi_mapping;
 258                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 259                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 260                                 global_flags.midi_mapping_filename.c_str());
 261                         exit(1);
 262                 }
 263                 midi_mapper.set_midi_mapping(midi_mapping);
 264         }
 265         midi_mapper.refresh_lights();
 266         midi_mapper.start_thread();
 267 }
 268
 269 void MainWindow::change_num_cameras()
 270 {
 271         assert(num_cameras >= displays.size());  // We only add, never remove.
 272
 273         // Make new display rows.
 274         unsigned display_rows = (num_cameras + 1) / 2;
 275         ui->video_displays->setStretch(1, display_rows);
 276         for (unsigned i = displays.size(); i < num_cameras; ++i) {
 277                 QFrame *frame = new QFrame(this);
 278                 frame->setAutoFillBackground(true);
 279
 280                 QLayout *layout = new QGridLayout(frame);
 281                 frame->setLayout(layout);
 282                 layout->setContentsMargins(3, 3, 3, 3);
 283
 284                 JPEGFrameView *display = new JPEGFrameView(frame);
 285                 display->setAutoFillBackground(true);
 286                 layout->addWidget(display);
 287
 288                 ui->input_displays->addWidget(frame, i / 2, i % 2);
 289                 display->set_overlay(to_string(i + 1));
 290
 291                 QPushButton *preview_btn = new QPushButton(this);
 292                 preview_btn->setMaximumSize(20, 17);
 293                 preview_btn->setText(QString::fromStdString(to_string(i + 1)));
 294                 ui->preview_layout->addWidget(preview_btn);
 295
 296                 displays.emplace_back(FrameAndDisplay{ frame, display, preview_btn });
 297
 298                 connect(display, &JPEGFrameView::clicked, preview_btn, &QPushButton::click);
 299                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 300                 connect(shortcut, &QShortcut::activated, preview_btn, &QPushButton::click);
 301
 302                 connect(preview_btn, &QPushButton::clicked, [this, i] { preview_angle_clicked(i); });
 303         }
 304
 305         cliplist_clips->change_num_cameras(num_cameras);
 306         playlist_clips->change_num_cameras(num_cameras);
 307
 308         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 309 }
 310
 311 MainWindow::~MainWindow()
 312 {
 313         // Empty so that we can forward-declare Player in the .h file.
 314 }
 315
 316 void MainWindow::cue_in_clicked()
 317 {
 318         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 319                 cliplist_clips->mutable_back()->pts_in = current_pts;
 320         } else {
 321                 Clip clip;
 322                 clip.pts_in = max<int64_t>(current_pts - lrint(global_flags.cue_point_padding_seconds * TIMEBASE), 0);
 323                 cliplist_clips->add_clip(clip);
 324                 playlist_selection_changed();
 325         }
 326
 327         // Select the item so that we can jog it.
 328         ui->clip_list->setFocus();
 329         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::IN));
 330         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 331         ui->clip_list->scrollToBottom();
 332         enable_or_disable_queue_button();
 333 }
 334
 335 void MainWindow::cue_out_clicked()
 336 {
 337         if (cliplist_clips->empty()) {
 338                 return;
 339         }
 340
 341         cliplist_clips->mutable_back()->pts_out = current_pts + lrint(global_flags.cue_point_padding_seconds * TIMEBASE);
 342
 343         // Select the item so that we can jog it.
 344         ui->clip_list->setFocus();
 345         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::OUT));
 346         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 347         ui->clip_list->scrollToBottom();
 348         enable_or_disable_queue_button();
 349 }
 350
 351 void MainWindow::queue_clicked()
 352 {
 353         // See also enable_or_disable_queue_button().
 354
 355         if (cliplist_clips->empty()) {
 356                 return;
 357         }
 358
 359         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 360         if (!selected->hasSelection()) {
 361                 Clip clip = *cliplist_clips->back();
 362                 clip.stream_idx = 0;
 363                 if (clip.pts_out != -1) {
 364                         playlist_clips->add_clip(clip);
 365                         playlist_selection_changed();
 366                         ui->playlist->scrollToBottom();
 367                 }
 368                 return;
 369         }
 370
 371         QModelIndex index = selected->currentIndex();
 372         Clip clip = *cliplist_clips->clip(index.row());
 373         if (cliplist_clips->is_camera_column(index.column())) {
 374                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 375         } else {
 376                 clip.stream_idx = ui->preview_display->get_stream_idx();
 377         }
 378
 379         if (clip.pts_out != -1) {
 380                 playlist_clips->add_clip(clip);
 381                 playlist_selection_changed();
 382                 ui->playlist->scrollToBottom();
 383                 if (!ui->playlist->selectionModel()->hasSelection()) {
 384                         // TODO: Figure out why this doesn't always seem to actually select the row.
 385                         QModelIndex bottom = playlist_clips->index(playlist_clips->size() - 1, 0);
 386                         ui->playlist->setCurrentIndex(bottom);
 387                 }
 388         }
 389 }
 390
 391 void MainWindow::preview_clicked()
 392 {
 393         // See also enable_or_disable_preview_button().
 394
 395         if (ui->playlist->hasFocus()) {
 396                 // Allow the playlist as preview iff it has focus and something is selected.
 397                 QItemSelectionModel *selected = ui->playlist->selectionModel();
 398                 if (selected->hasSelection()) {
 399                         QModelIndex index = selected->currentIndex();
 400                         const Clip &clip = *playlist_clips->clip(index.row());
 401                         preview_player->play(clip);
 402                         preview_playing = true;
 403                         enable_or_disable_preview_button();
 404                         return;
 405                 }
 406         }
 407
 408         if (cliplist_clips->empty())
 409                 return;
 410
 411         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 412         if (!selected->hasSelection()) {
 413                 preview_player->play(*cliplist_clips->back());
 414                 preview_playing = true;
 415                 enable_or_disable_preview_button();
 416                 return;
 417         }
 418
 419         QModelIndex index = selected->currentIndex();
 420         Clip clip = *cliplist_clips->clip(index.row());
 421         if (cliplist_clips->is_camera_column(index.column())) {
 422                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 423         } else {
 424                 clip.stream_idx = ui->preview_display->get_stream_idx();
 425         }
 426         preview_player->play(clip);
 427         preview_playing = true;
 428         enable_or_disable_preview_button();
 429 }
 430
 431 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 432 {
 433         preview_player->override_angle(stream_idx);
 434
 435         // Change the selection if we were previewing a clip from the clip list.
 436         // (The only other thing we could be showing is a pts scrub, and if so,
 437         // that would be selected.)
 438         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 439         if (selected->hasSelection()) {
 440                 QModelIndex cell = selected->selectedIndexes()[0];
 441                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 442                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 443         }
 444 }
 445
 446 void MainWindow::playlist_duplicate()
 447 {
 448         QItemSelectionModel *selected = ui->playlist->selectionModel();
 449         if (!selected->hasSelection()) {
 450                 // Should have been grayed out, but OK.
 451                 return;
 452         }
 453         QModelIndexList rows = selected->selectedRows();
 454         int first = rows.front().row(), last = rows.back().row();
 455         playlist_clips->duplicate_clips(first, last);
 456         playlist_selection_changed();
 457 }
 458
 459 void MainWindow::playlist_remove()
 460 {
 461         QItemSelectionModel *selected = ui->playlist->selectionModel();
 462         if (!selected->hasSelection()) {
 463                 // Should have been grayed out, but OK.
 464                 return;
 465         }
 466         QModelIndexList rows = selected->selectedRows();
 467         int first = rows.front().row(), last = rows.back().row();
 468         playlist_clips->erase_clips(first, last);
 469
 470         // TODO: select the next one in the list?
 471
 472         playlist_selection_changed();
 473 }
 474
 475 void MainWindow::playlist_move(int delta)
 476 {
 477         QItemSelectionModel *selected = ui->playlist->selectionModel();
 478         if (!selected->hasSelection()) {
 479                 // Should have been grayed out, but OK.
 480                 return;
 481         }
 482
 483         QModelIndexList rows = selected->selectedRows();
 484         int first = rows.front().row(), last = rows.back().row();
 485         if ((delta == -1 && first == 0) ||
 486             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 487                 // Should have been grayed out, but OK.
 488                 return;
 489         }
 490
 491         playlist_clips->move_clips(first, last, delta);
 492         playlist_selection_changed();
 493 }
 494
 495 void MainWindow::jog_internal(JogDestination jog_destination, int row, int column, int stream_idx, int pts_delta)
 496 {
 497         constexpr int camera_pts_per_pixel = 1500;  // One click of most mice (15 degrees), multiplied by the default wheel_sensitivity.
 498
 499         int in_column, out_column, camera_column;
 500         if (jog_destination == JOG_CLIP_LIST) {
 501                 in_column = int(ClipList::Column::IN);
 502                 out_column = int(ClipList::Column::OUT);
 503                 camera_column = -1;
 504         } else if (jog_destination == JOG_PLAYLIST) {
 505                 in_column = int(PlayList::Column::IN);
 506                 out_column = int(PlayList::Column::OUT);
 507                 camera_column = int(PlayList::Column::CAMERA);
 508         } else {
 509                 assert(false);
 510         }
 511
 512         currently_deferring_model_changes = true;
 513         {
 514                 current_change_id = (jog_destination == JOG_CLIP_LIST) ? "cliplist:" : "playlist:";
 515                 ClipProxy clip = (jog_destination == JOG_CLIP_LIST) ? cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 516                 if (jog_destination == JOG_PLAYLIST) {
 517                         stream_idx = clip->stream_idx;
 518                 }
 519
 520                 if (column == in_column) {
 521                         current_change_id += "in:" + to_string(row);
 522                         int64_t pts = clip->pts_in + pts_delta;
 523                         set_pts_in(pts, current_pts, clip);
 524                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 525                 } else if (column == out_column) {
 526                         current_change_id += "out:" + to_string(row);
 527                         int64_t pts = clip->pts_out + pts_delta;
 528                         pts = std::max(pts, clip->pts_in);
 529                         pts = std::min(pts, current_pts);
 530                         clip->pts_out = pts;
 531                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 532                 } else if (column == camera_column) {
 533                         current_change_id += "camera:" + to_string(row);
 534                         int angle_degrees = pts_delta;
 535                         if (last_mousewheel_camera_row == row) {
 536                                 angle_degrees += leftover_angle_degrees;
 537                         }
 538
 539                         int stream_idx = clip->stream_idx + angle_degrees / camera_pts_per_pixel;
 540                         stream_idx = std::max(stream_idx, 0);
 541                         stream_idx = std::min<int>(stream_idx, num_cameras - 1);
 542                         clip->stream_idx = stream_idx;
 543
 544                         last_mousewheel_camera_row = row;
 545                         leftover_angle_degrees = angle_degrees % camera_pts_per_pixel;
 546
 547                         // Don't update the live view, that's rarely what the operator wants.
 548                 }
 549         }
 550         currently_deferring_model_changes = false;
 551 }
 552
 553 void MainWindow::defer_timer_expired()
 554 {
 555         state_changed(deferred_state);
 556 }
 557
 558 void MainWindow::content_changed()
 559 {
 560         // If we are playing, update the part of the playlist that's not playing yet.
 561         vector<ClipWithID> clips;
 562         for (unsigned row = 0; row < playlist_clips->size(); ++row) {
 563                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 564         }
 565         live_player->splice_play(clips);
 566
 567         // Serialize the state.
 568         if (defer_timeout->isActive() &&
 569             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 570                 // There's some deferred event waiting, but this event is unrelated.
 571                 // So it's time to short-circuit that timer and do the work it wanted to do.
 572                 defer_timeout->stop();
 573                 state_changed(deferred_state);
 574         }
 575         StateProto state;
 576         *state.mutable_clip_list() = cliplist_clips->serialize();
 577         *state.mutable_play_list() = playlist_clips->serialize();
 578         if (currently_deferring_model_changes) {
 579                 deferred_change_id = current_change_id;
 580                 deferred_state = std::move(state);
 581                 defer_timeout->start(200);
 582                 return;
 583         }
 584         state_changed(state);
 585 }
 586
 587 void MainWindow::state_changed(const StateProto &state)
 588 {
 589         db.store_state(state);
 590
 591         redo_stack.clear();
 592         ui->redo_action->setEnabled(false);
 593
 594         undo_stack.push_back(state);
 595         ui->undo_action->setEnabled(undo_stack.size() > 1);
 596
 597         // Make sure it doesn't grow without bounds.
 598         while (undo_stack.size() >= 100) {
 599                 undo_stack.pop_front();
 600         }
 601 }
 602
 603 void MainWindow::save_settings()
 604 {
 605         SettingsProto settings;
 606         settings.set_interpolation_quality(global_flags.interpolation_quality + 1);
 607         settings.set_cue_point_padding_seconds(global_flags.cue_point_padding_seconds);
 608         db.store_settings(settings);
 609 }
 610
 611 void MainWindow::lock_blink_timer_expired()
 612 {
 613         midi_mapper.set_locked(MIDIMapper::LightState(ui->speed_lock_btn->isChecked()));  // Presumably On, or the timer should have been canceled.
 614 }
 615
 616 void MainWindow::play_clicked()
 617 {
 618         QItemSelectionModel *selected = ui->playlist->selectionModel();
 619         if (!selected->hasSelection()) {
 620                 return;
 621         }
 622         unsigned start_row = selected->selectedRows(0)[0].row();
 623
 624         vector<ClipWithID> clips;
 625         for (unsigned row = start_row; row < playlist_clips->size(); ++row) {
 626                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 627         }
 628         live_player->play(clips);
 629         playlist_clips->set_progress({ { start_row, 0.0f } });
 630         ui->playlist->selectionModel()->clear();
 631         ui->stop_btn->setEnabled(true);
 632         playlist_selection_changed();
 633 }
 634
 635 void MainWindow::stop_clicked()
 636 {
 637         Clip fake_clip;
 638         fake_clip.pts_in = 0;
 639         fake_clip.pts_out = 0;
 640         playlist_clips->set_progress({});
 641         live_player->play(fake_clip);
 642         ui->stop_btn->setEnabled(false);
 643         playlist_selection_changed();
 644 }
 645
 646 void MainWindow::speed_slider_changed(int percent)
 647 {
 648         float speed = percent / 100.0f;
 649         ui->speed_lock_btn->setText(QString::fromStdString(" " + to_string(percent) + "%"));
 650         live_player->set_master_speed(speed);
 651 }
 652
 653 void MainWindow::speed_lock_clicked()
 654 {
 655         // TODO: Make for a less abrupt transition if we're not already at 100%.
 656         ui->speed_slider->setValue(100);  // Also actually sets the master speed and updates the label.
 657         ui->speed_slider->setEnabled(!ui->speed_lock_btn->isChecked());
 658         midi_mapper.set_locked(MIDIMapper::LightState(ui->speed_lock_btn->isChecked()));
 659         lock_blink_timeout->stop();
 660 }
 661
 662 void MainWindow::preview_player_done()
 663 {
 664         preview_playing = false;
 665         enable_or_disable_preview_button();
 666 }
 667
 668 void MainWindow::live_player_done()
 669 {
 670         playlist_clips->set_progress({});
 671         ui->stop_btn->setEnabled(false);
 672         playlist_selection_changed();
 673 }
 674
 675 void MainWindow::live_player_clip_progress(const map<uint64_t, double> &progress, double time_remaining)
 676 {
 677         playlist_clips->set_progress(progress);
 678         set_output_status(format_duration(time_remaining) + " left");
 679 }
 680
 681 void MainWindow::resizeEvent(QResizeEvent *event)
 682 {
 683         QMainWindow::resizeEvent(event);
 684
 685         // Ask for a relayout, but only after the event loop is done doing relayout
 686         // on everything else.
 687         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 688 }
 689
 690 void MainWindow::relayout()
 691 {
 692         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 693         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 694 }
 695
 696 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 697 {
 698         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 699         int scrub_sensitivity = 100;  // pts units per pixel.
 700         int wheel_sensitivity = 100;  // pts units per degree.
 701
 702         if (event->type() == QEvent::FocusIn || event->type() == QEvent::FocusOut) {
 703                 enable_or_disable_preview_button();
 704                 hidden_jog_column = -1;
 705         }
 706
 707         unsigned stream_idx = ui->preview_display->get_stream_idx();
 708
 709         if (watched == ui->clip_list) {
 710                 if (event->type() == QEvent::FocusOut) {
 711                         highlight_camera_input(-1);
 712                 }
 713                 return false;
 714         }
 715
 716         if (event->type() != QEvent::Wheel) {
 717                 last_mousewheel_camera_row = -1;
 718         }
 719
 720         if (event->type() == QEvent::MouseButtonPress) {
 721                 QMouseEvent *mouse = (QMouseEvent *)event;
 722
 723                 QTableView *destination;
 724                 ScrubType type;
 725
 726                 if (watched == ui->clip_list->viewport()) {
 727                         destination = ui->clip_list;
 728                         type = SCRUBBING_CLIP_LIST;
 729                 } else if (watched == ui->playlist->viewport()) {
 730                         destination = ui->playlist;
 731                         type = SCRUBBING_PLAYLIST;
 732                 } else {
 733                         return false;
 734                 }
 735                 int column = destination->columnAt(mouse->x());
 736                 int row = destination->rowAt(mouse->y());
 737                 if (column == -1 || row == -1)
 738                         return false;
 739
 740                 if (type == SCRUBBING_CLIP_LIST) {
 741                         if (ClipList::Column(column) == ClipList::Column::IN) {
 742                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 743                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 744                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 745                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 746                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 747                         } else {
 748                                 return false;
 749                         }
 750                 } else {
 751                         if (PlayList::Column(column) == PlayList::Column::IN) {
 752                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 753                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 754                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 755                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 756                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 757                         } else {
 758                                 return false;
 759                         }
 760                 }
 761
 762                 scrubbing = true;
 763                 scrub_row = row;
 764                 scrub_column = column;
 765                 scrub_x_origin = mouse->x();
 766                 scrub_type = type;
 767         } else if (event->type() == QEvent::MouseMove) {
 768                 QMouseEvent *mouse = (QMouseEvent *)event;
 769                 if (mouse->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 770                         scrub_sensitivity *= 10;
 771                         wheel_sensitivity *= 10;
 772                 }
 773                 if (mouse->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 774                         scrub_sensitivity /= 10;
 775                         wheel_sensitivity /= 10;
 776                 }
 777                 if (scrubbing) {
 778                         int offset = mouse->x() - scrub_x_origin;
 779                         int adjusted_offset;
 780                         if (offset >= dead_zone_pixels) {
 781                                 adjusted_offset = offset - dead_zone_pixels;
 782                         } else if (offset < -dead_zone_pixels) {
 783                                 adjusted_offset = offset + dead_zone_pixels;
 784                         } else {
 785                                 adjusted_offset = 0;
 786                         }
 787
 788                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 789                         currently_deferring_model_changes = true;
 790                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 791                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 792                                 if (scrub_column == int(ClipList::Column::IN)) {
 793                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 794                                         set_pts_in(pts, current_pts, clip);
 795                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 796                                 } else {
 797                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 798                                         pts = std::max(pts, clip->pts_in);
 799                                         pts = std::min(pts, current_pts);
 800                                         clip->pts_out = pts;
 801                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 802                                 }
 803                         } else {
 804                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 805                                 if (scrub_column == int(PlayList::Column::IN)) {
 806                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 807                                         set_pts_in(pts, current_pts, clip);
 808                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 809                                 } else {
 810                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 811                                         pts = std::max(pts, clip->pts_in);
 812                                         pts = std::min(pts, current_pts);
 813                                         clip->pts_out = pts;
 814                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 815                                 }
 816                         }
 817                         currently_deferring_model_changes = false;
 818
 819                         return true;  // Don't use this mouse movement for selecting things.
 820                 }
 821         } else if (event->type() == QEvent::Wheel) {
 822                 QWheelEvent *wheel = (QWheelEvent *)event;
 823                 int angle_delta = wheel->angleDelta().y();
 824                 if (wheel->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 825                         scrub_sensitivity *= 10;
 826                         wheel_sensitivity *= 10;
 827                 }
 828                 if (wheel->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 829                         scrub_sensitivity /= 10;
 830                         wheel_sensitivity /= 10;
 831                         angle_delta = wheel->angleDelta().x();  // Qt ickiness.
 832                 }
 833
 834                 QTableView *destination;
 835                 JogDestination jog_destination;
 836                 if (watched == ui->clip_list->viewport()) {
 837                         destination = ui->clip_list;
 838                         jog_destination = JOG_CLIP_LIST;
 839                         last_mousewheel_camera_row = -1;
 840                 } else if (watched == ui->playlist->viewport()) {
 841                         destination = ui->playlist;
 842                         jog_destination = JOG_PLAYLIST;
 843                         if (destination->columnAt(wheel->x()) != int(PlayList::Column::CAMERA)) {
 844                                 last_mousewheel_camera_row = -1;
 845                         }
 846                 } else {
 847                         last_mousewheel_camera_row = -1;
 848                         return false;
 849                 }
 850
 851                 int column = destination->columnAt(wheel->x());
 852                 int row = destination->rowAt(wheel->y());
 853                 if (column == -1 || row == -1)
 854                         return false;
 855
 856                 // Only adjust pts with the wheel if the given row is selected.
 857                 if (!destination->hasFocus() ||
 858                     row != destination->selectionModel()->currentIndex().row()) {
 859                         return false;
 860                 }
 861
 862                 jog_internal(jog_destination, row, column, stream_idx, angle_delta * wheel_sensitivity);
 863                 return true;  // Don't scroll.
 864         } else if (event->type() == QEvent::MouseButtonRelease) {
 865                 scrubbing = false;
 866         }
 867         return false;
 868 }
 869
 870 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 871 {
 872         if (rounding == LAST_BEFORE) {
 873                 lock_guard<mutex> lock(frame_mu);
 874                 if (frames[stream_idx].empty())
 875                         return;
 876                 auto it = find_last_frame_before(frames[stream_idx], pts);
 877                 if (it != frames[stream_idx].end()) {
 878                         pts = it->pts;
 879                 }
 880         } else {
 881                 assert(rounding == FIRST_AT_OR_AFTER);
 882                 lock_guard<mutex> lock(frame_mu);
 883                 if (frames[stream_idx].empty())
 884                         return;
 885                 auto it = find_first_frame_at_or_after(frames[stream_idx], pts);
 886                 if (it != frames[stream_idx].end()) {
 887                         pts = it->pts;
 888                 }
 889         }
 890
 891         Clip fake_clip;
 892         fake_clip.pts_in = pts;
 893         fake_clip.pts_out = pts + 1;
 894         fake_clip.stream_idx = stream_idx;
 895         preview_player->play(fake_clip);
 896 }
 897
 898 void MainWindow::playlist_selection_changed()
 899 {
 900         enable_or_disable_preview_button();
 901
 902         QItemSelectionModel *selected = ui->playlist->selectionModel();
 903         bool any_selected = selected->hasSelection();
 904         ui->playlist_duplicate_btn->setEnabled(any_selected);
 905         ui->playlist_remove_btn->setEnabled(any_selected);
 906         ui->playlist_move_up_btn->setEnabled(
 907                 any_selected && selected->selectedRows().front().row() > 0);
 908         ui->playlist_move_down_btn->setEnabled(
 909                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 910
 911         ui->play_btn->setEnabled(any_selected);
 912         if (ui->stop_btn->isEnabled()) {  // Playing.
 913                 midi_mapper.set_play_enabled(MIDIMapper::On);
 914         } else if (any_selected) {
 915                 midi_mapper.set_play_enabled(MIDIMapper::Blinking);
 916         } else {
 917                 midi_mapper.set_play_enabled(MIDIMapper::Off);
 918         }
 919
 920         if (!any_selected) {
 921                 set_output_status("paused");
 922         } else {
 923                 vector<ClipWithID> clips;
 924                 for (size_t row = selected->selectedRows().front().row(); row < playlist_clips->size(); ++row) {
 925                         clips.emplace_back(*playlist_clips->clip_with_id(row));
 926                 }
 927                 double remaining = compute_total_time(clips);
 928                 set_output_status(format_duration(remaining) + " ready");
 929         }
 930 }
 931
 932 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &previous)
 933 {
 934         int camera_selected = -1;
 935         if (cliplist_clips->is_camera_column(current.column())) {
 936                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 937
 938                 // See the comment on hidden_jog_column.
 939                 if (current.row() != previous.row()) {
 940                         hidden_jog_column = -1;
 941                 } else if (hidden_jog_column == -1) {
 942                         hidden_jog_column = previous.column();
 943                 }
 944         } else {
 945                 hidden_jog_column = -1;
 946         }
 947         highlight_camera_input(camera_selected);
 948         enable_or_disable_queue_button();
 949 }
 950
 951 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 952 {
 953         char time_str[256];
 954         if (estimated_seconds_left < 60.0) {
 955                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 956         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 957                 int s = lrintf(estimated_seconds_left);
 958                 int m = s / 60;
 959                 s %= 60;
 960                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 961         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 962                 int m = lrintf(estimated_seconds_left / 60.0);
 963                 snprintf(time_str, sizeof(time_str), "%dm", m);
 964         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 965                 int m = lrintf(estimated_seconds_left / 60.0);
 966                 int h = m / 60;
 967                 m %= 60;
 968                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 969         } else {  // More than ten hours: Xh.
 970                 int h = lrintf(estimated_seconds_left / 3600.0);
 971                 snprintf(time_str, sizeof(time_str), "%dh", h);
 972         }
 973         char buf[256];
 974         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 975
 976         std::string label = buf;
 977
 978         post_to_main_thread([this, label] {
 979                 disk_free_label->setText(QString::fromStdString(label));
 980                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 981         });
 982 }
 983
 984 void MainWindow::exit_triggered()
 985 {
 986         close();
 987 }
 988
 989 void MainWindow::export_cliplist_clip_multitrack_triggered()
 990 {
 991         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 992         if (!selected->hasSelection()) {
 993                 QMessageBox msgbox;
 994                 msgbox.setText("No clip selected in the clip list. Select one and try exporting again.");
 995                 msgbox.exec();
 996                 return;
 997         }
 998
 999         QModelIndex index = selected->currentIndex();
1000         Clip clip = *cliplist_clips->clip(index.row());
1001         QString filename = QFileDialog::getSaveFileName(this,
1002                 "Export multitrack clip", QString(), tr("Matroska video files (*.mkv)"));
1003         if (filename.isNull()) {
1004                 // Cancel.
1005                 return;
1006         }
1007         if (!filename.endsWith(".mkv")) {
1008                 filename += ".mkv";
1009         }
1010         export_multitrack_clip(filename.toStdString(), clip);
1011 }
1012
1013 void MainWindow::export_playlist_clip_interpolated_triggered()
1014 {
1015         QItemSelectionModel *selected = ui->playlist->selectionModel();
1016         if (!selected->hasSelection()) {
1017                 QMessageBox msgbox;
1018                 msgbox.setText("No clip selected in the playlist. Select one and try exporting again.");
1019                 msgbox.exec();
1020                 return;
1021         }
1022
1023         QString filename = QFileDialog::getSaveFileName(this,
1024                 "Export interpolated clip", QString(), tr("Matroska video files (*.mkv)"));
1025         if (filename.isNull()) {
1026                 // Cancel.
1027                 return;
1028         }
1029         if (!filename.endsWith(".mkv")) {
1030                 filename += ".mkv";
1031         }
1032
1033         vector<Clip> clips;
1034         QModelIndexList rows = selected->selectedRows();
1035         for (QModelIndex index : rows) {
1036                 clips.push_back(*playlist_clips->clip(index.row()));
1037         }
1038         export_interpolated_clip(filename.toStdString(), clips);
1039 }
1040
1041 void MainWindow::manual_triggered()
1042 {
1043         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
1044                 QMessageBox msgbox;
1045                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
1046                 msgbox.exec();
1047         }
1048 }
1049
1050 void MainWindow::about_triggered()
1051 {
1052         AboutDialog("Futatabi", "Multicamera slow motion video server").exec();
1053 }
1054
1055 void MainWindow::undo_triggered()
1056 {
1057         // Finish any deferred action.
1058         if (defer_timeout->isActive()) {
1059                 defer_timeout->stop();
1060                 state_changed(deferred_state);
1061         }
1062
1063         StateProto redo_state;
1064         *redo_state.mutable_clip_list() = cliplist_clips->serialize();
1065         *redo_state.mutable_play_list() = playlist_clips->serialize();
1066         redo_stack.push_back(std::move(redo_state));
1067         ui->redo_action->setEnabled(true);
1068
1069         assert(undo_stack.size() > 1);
1070
1071         // Pop off the current state, which is always at the top of the stack.
1072         undo_stack.pop_back();
1073
1074         StateProto state = undo_stack.back();
1075         ui->undo_action->setEnabled(undo_stack.size() > 1);
1076
1077         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
1078         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
1079
1080         db.store_state(state);
1081 }
1082
1083 void MainWindow::redo_triggered()
1084 {
1085         assert(!redo_stack.empty());
1086
1087         ui->undo_action->setEnabled(true);
1088         ui->redo_action->setEnabled(true);
1089
1090         undo_stack.push_back(std::move(redo_stack.back()));
1091         redo_stack.pop_back();
1092         ui->undo_action->setEnabled(true);
1093         ui->redo_action->setEnabled(!redo_stack.empty());
1094
1095         const StateProto &state = undo_stack.back();
1096         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
1097         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
1098
1099         db.store_state(state);
1100 }
1101
1102 void MainWindow::quality_toggled(int quality, bool checked)
1103 {
1104         if (!checked) {
1105                 return;
1106         }
1107         global_flags.interpolation_quality = quality;
1108         if (quality != 0 &&  // Turning interpolation off is always possible.
1109             quality != flow_initialized_interpolation_quality) {
1110                 QMessageBox msgbox;
1111                 msgbox.setText(QString::fromStdString(
1112                         "The interpolation quality for the main output cannot be changed at runtime, "
1113                         "except being turned completely off; it will take effect for exported files "
1114                         "only until next restart. The live output quality thus remains at " +
1115                         to_string(flow_initialized_interpolation_quality) + "."));
1116                 msgbox.exec();
1117         }
1118
1119         save_settings();
1120 }
1121
1122 void MainWindow::padding_toggled(double seconds, bool checked)
1123 {
1124         if (!checked) {
1125                 return;
1126         }
1127         global_flags.cue_point_padding_seconds = seconds;
1128         save_settings();
1129 }
1130
1131 void MainWindow::highlight_camera_input(int stream_idx)
1132 {
1133         for (unsigned i = 0; i < num_cameras; ++i) {
1134                 if (unsigned(stream_idx) == i) {
1135                         displays[i].frame->setStyleSheet("background: rgb(0,255,0)");
1136                 } else {
1137                         displays[i].frame->setStyleSheet("");
1138                 }
1139         }
1140         midi_mapper.highlight_camera_input(stream_idx);
1141 }
1142
1143 void MainWindow::enable_or_disable_preview_button()
1144 {
1145         // Follows the logic in preview_clicked().
1146
1147         if (ui->playlist->hasFocus()) {
1148                 // Allow the playlist as preview iff it has focus and something is selected.
1149                 // TODO: Is this part really relevant?
1150                 QItemSelectionModel *selected = ui->playlist->selectionModel();
1151                 if (selected->hasSelection()) {
1152                         ui->preview_btn->setEnabled(true);
1153                         midi_mapper.set_preview_enabled(preview_playing ? MIDIMapper::On : MIDIMapper::Blinking);
1154                         return;
1155                 }
1156         }
1157
1158         // TODO: Perhaps only enable this if something is actually selected.
1159         ui->preview_btn->setEnabled(!cliplist_clips->empty());
1160         if (preview_playing) {
1161                 midi_mapper.set_preview_enabled(MIDIMapper::On);
1162         } else {
1163                 midi_mapper.set_preview_enabled(cliplist_clips->empty() ? MIDIMapper::Off : MIDIMapper::Blinking);
1164         }
1165 }
1166
1167 void MainWindow::enable_or_disable_queue_button()
1168 {
1169         // Follows the logic in queue_clicked().
1170         // TODO: Perhaps only enable this if something is actually selected.
1171
1172         bool enabled;
1173
1174         if (cliplist_clips->empty()) {
1175                 enabled = false;
1176         } else {
1177                 QItemSelectionModel *selected = ui->clip_list->selectionModel();
1178                 if (!selected->hasSelection()) {
1179                         Clip clip = *cliplist_clips->back();
1180                         enabled = clip.pts_out != -1;
1181                 } else {
1182                         QModelIndex index = selected->currentIndex();
1183                         Clip clip = *cliplist_clips->clip(index.row());
1184                         enabled = clip.pts_out != -1;
1185                 }
1186         }
1187
1188         ui->queue_btn->setEnabled(enabled);
1189         midi_mapper.set_queue_enabled(enabled);
1190 }
1191
1192 void MainWindow::set_output_status(const string &status)
1193 {
1194         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
1195         if (live_player != nullptr) {
1196                 live_player->set_pause_status(status);
1197         }
1198
1199         lock_guard<mutex> lock(queue_status_mu);
1200         queue_status = status;
1201 }
1202
1203 pair<string, string> MainWindow::get_queue_status() const
1204 {
1205         lock_guard<mutex> lock(queue_status_mu);
1206         return { queue_status, "text/plain" };
1207 }
1208
1209 void MainWindow::display_frame(unsigned stream_idx, const FrameOnDisk &frame)
1210 {
1211         if (stream_idx >= MAX_STREAMS) {
1212                 fprintf(stderr, "WARNING: Ignoring too-high stream index %u.\n", stream_idx);
1213                 return;
1214         }
1215         if (stream_idx >= num_cameras) {
1216                 post_to_main_thread_and_wait([this, stream_idx] {
1217                         num_cameras = stream_idx + 1;
1218                         change_num_cameras();
1219                 });
1220         }
1221         displays[stream_idx].display->setFrame(stream_idx, frame);
1222 }
1223
1224 void MainWindow::preview()
1225 {
1226         post_to_main_thread([this] {
1227                 preview_clicked();
1228         });
1229 }
1230
1231 void MainWindow::queue()
1232 {
1233         post_to_main_thread([this] {
1234                 queue_clicked();
1235         });
1236 }
1237
1238 void MainWindow::play()
1239 {
1240         post_to_main_thread([this] {
1241                 play_clicked();
1242         });
1243 }
1244
1245 void MainWindow::toggle_lock()
1246 {
1247         post_to_main_thread([this] {
1248                 ui->speed_lock_btn->setChecked(!ui->speed_lock_btn->isChecked());
1249                 speed_lock_clicked();
1250         });
1251 }
1252
1253 void MainWindow::jog(int delta)
1254 {
1255         post_to_main_thread([this, delta] {
1256                 int64_t pts_delta = delta * (TIMEBASE / 60);  // One click = frame at 60 fps.
1257                 if (ui->playlist->hasFocus()) {
1258                         QModelIndex selected = ui->playlist->selectionModel()->currentIndex();
1259                         if (selected.column() != -1 && selected.row() != -1) {
1260                                 jog_internal(JOG_PLAYLIST, selected.row(), selected.column(), /*stream_idx=*/-1, pts_delta);
1261                         }
1262                 } else if (ui->clip_list->hasFocus()) {
1263                         QModelIndex selected = ui->clip_list->selectionModel()->currentIndex();
1264                         if (cliplist_clips->is_camera_column(selected.column()) &&
1265                             hidden_jog_column != -1) {
1266                                 // See the definition on hidden_jog_column.
1267                                 selected = selected.sibling(selected.row(), hidden_jog_column);
1268                                 ui->clip_list->selectionModel()->setCurrentIndex(selected, QItemSelectionModel::ClearAndSelect);
1269                                 hidden_jog_column = -1;
1270                         }
1271                         if (selected.column() != -1 && selected.row() != -1) {
1272                                 jog_internal(JOG_CLIP_LIST, selected.row(), selected.column(), ui->preview_display->get_stream_idx(), pts_delta);
1273                         }
1274                 }
1275         });
1276 }
1277
1278 void MainWindow::switch_camera(unsigned camera_idx)
1279 {
1280         post_to_main_thread([this, camera_idx] {
1281                 if (camera_idx < num_cameras) {  // TODO: Also make this change a highlighted clip?
1282                         preview_angle_clicked(camera_idx);
1283                 }
1284         });
1285 }
1286
1287 void MainWindow::set_master_speed(float speed)
1288 {
1289         speed = min(max(speed, 0.1f), 2.0f);
1290
1291         post_to_main_thread([this, speed] {
1292                 if (ui->speed_lock_btn->isChecked()) {
1293                         midi_mapper.set_locked(MIDIMapper::Blinking);
1294                         lock_blink_timeout->start(1000);
1295                         return;
1296                 }
1297
1298                 int percent = lrintf(speed * 100.0f);
1299                 ui->speed_slider->blockSignals(true);
1300                 ui->speed_slider->setValue(percent);
1301                 ui->speed_slider->blockSignals(false);
1302                 ui->speed_lock_btn->setText(QString::fromStdString(" " + to_string(percent) + "%"));
1303
1304                 live_player->set_master_speed(speed);
1305         });
1306 }
1307
1308 void MainWindow::cue_in()
1309 {
1310         post_to_main_thread([this] { cue_in_clicked(); });
1311 }
1312
1313 void MainWindow::cue_out()
1314 {
1315         post_to_main_thread([this] { cue_out_clicked(); });
1316 }
1317
1318 template<class Model>
1319 void MainWindow::replace_model(QTableView *view, Model **model, Model *new_model)
1320 {
1321         QItemSelectionModel *old_selection_model = view->selectionModel();
1322         view->setModel(new_model);
1323         delete *model;
1324         delete old_selection_model;
1325         *model = new_model;
1326         connect(new_model, &Model::any_content_changed, this, &MainWindow::content_changed);
1327 }
1328
1329 void MainWindow::start_tally()
1330 {
1331         http_reply = http.get(QNetworkRequest(QString::fromStdString(global_flags.tally_url)));
1332         connect(http_reply, &QNetworkReply::finished, this, &MainWindow::tally_received);
1333 }
1334
1335 void MainWindow::tally_received()
1336 {
1337         unsigned time_to_next_tally_ms;
1338         if (http_reply->error()) {
1339                 fprintf(stderr, "HTTP get of '%s' failed: %s\n", global_flags.tally_url.c_str(),
1340                         http_reply->errorString().toStdString().c_str());
1341                 ui->live_frame->setStyleSheet("");
1342                 time_to_next_tally_ms = 1000;
1343         } else {
1344                 string contents = http_reply->readAll().toStdString();
1345                 ui->live_frame->setStyleSheet(QString::fromStdString("background: " + contents));
1346                 time_to_next_tally_ms = 100;
1347         }
1348         http_reply->deleteLater();
1349         http_reply = nullptr;
1350
1351         QTimer::singleShot(time_to_next_tally_ms, this, &MainWindow::start_tally);
1352 }