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 "midi_mapping_dialog.h"
  10 #include "shared/aboutdialog.h"
  11 #include "shared/disk_space_estimator.h"
  12 #include "shared/post_to_main_thread.h"
  13 #include "shared/timebase.h"
  14 #include "ui_mainwindow.h"
  15
  16 #include <QDesktopServices>
  17 #include <QFileDialog>
  18 #include <QMessageBox>
  19 #include <QMouseEvent>
  20 #include <QNetworkReply>
  21 #include <QShortcut>
  22 #include <QTimer>
  23 #include <QWheelEvent>
  24 #include <future>
  25 #include <sqlite3.h>
  26 #include <string>
  27 #include <vector>
  28
  29 using namespace std;
  30 using namespace std::placeholders;
  31
  32 MainWindow *global_mainwindow = nullptr;
  33 static ClipList *cliplist_clips;
  34 static PlayList *playlist_clips;
  35
  36 extern int64_t current_pts;
  37
  38 namespace {
  39
  40 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
  41 {
  42         pts = std::max<int64_t>(pts, 0);
  43         if (clip->pts_out == -1) {
  44                 pts = std::min(pts, current_pts);
  45         } else {
  46                 pts = std::min(pts, clip->pts_out);
  47         }
  48         clip->pts_in = pts;
  49 }
  50
  51 }  // namespace
  52
  53 MainWindow::MainWindow()
  54         : ui(new Ui::MainWindow),
  55           db(global_flags.working_directory + "/futatabi.db"),
  56           midi_mapper(this)
  57 {
  58         global_mainwindow = this;
  59         ui->setupUi(this);
  60
  61         // Load settings from database.
  62         SettingsProto settings = db.get_settings();
  63         if (!global_flags.interpolation_quality_set) {
  64                 if (settings.interpolation_quality() != 0) {
  65                         global_flags.interpolation_quality = settings.interpolation_quality() - 1;
  66                 }
  67         }
  68         if (!global_flags.cue_in_point_padding_set) {
  69                 global_flags.cue_in_point_padding_seconds = settings.cue_in_point_padding_seconds();  // Default 0 is fine.
  70         }
  71         if (!global_flags.cue_out_point_padding_set) {
  72                 global_flags.cue_out_point_padding_seconds = settings.cue_out_point_padding_seconds();  // Default 0 is fine.
  73         }
  74         if (global_flags.interpolation_quality == 0) {
  75                 // Allocate something just for simplicity; we won't be using it
  76                 // unless the user changes runtime, in which case 1 is fine.
  77                 flow_initialized_interpolation_quality = 1;
  78         } else {
  79                 flow_initialized_interpolation_quality = global_flags.interpolation_quality;
  80         }
  81         save_settings();
  82
  83         // The menus.
  84         connect(ui->midi_mapping_action, &QAction::triggered, this, &MainWindow::midi_mapping_triggered);
  85         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  86         connect(ui->export_cliplist_clip_multitrack_action, &QAction::triggered, this, &MainWindow::export_cliplist_clip_multitrack_triggered);
  87         connect(ui->export_playlist_clip_interpolated_action, &QAction::triggered, this, &MainWindow::export_playlist_clip_interpolated_triggered);
  88         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
  89         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
  90         connect(ui->undo_action, &QAction::triggered, this, &MainWindow::undo_triggered);
  91         connect(ui->redo_action, &QAction::triggered, this, &MainWindow::redo_triggered);
  92         ui->undo_action->setEnabled(false);
  93         ui->redo_action->setEnabled(false);
  94
  95         // The quality group.
  96         QActionGroup *quality_group = new QActionGroup(ui->interpolation_menu);
  97         quality_group->addAction(ui->quality_0_action);
  98         quality_group->addAction(ui->quality_1_action);
  99         quality_group->addAction(ui->quality_2_action);
 100         quality_group->addAction(ui->quality_3_action);
 101         quality_group->addAction(ui->quality_4_action);
 102         if (global_flags.interpolation_quality == 0) {
 103                 ui->quality_0_action->setChecked(true);
 104         } else if (global_flags.interpolation_quality == 1) {
 105                 ui->quality_1_action->setChecked(true);
 106         } else if (global_flags.interpolation_quality == 2) {
 107                 ui->quality_2_action->setChecked(true);
 108         } else if (global_flags.interpolation_quality == 3) {
 109                 ui->quality_3_action->setChecked(true);
 110         } else if (global_flags.interpolation_quality == 4) {
 111                 ui->quality_4_action->setChecked(true);
 112         } else {
 113                 assert(false);
 114         }
 115         connect(ui->quality_0_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 0, _1));
 116         connect(ui->quality_1_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 1, _1));
 117         connect(ui->quality_2_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 2, _1));
 118         connect(ui->quality_3_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 3, _1));
 119         connect(ui->quality_4_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 4, _1));
 120
 121         // The cue-in point padding group.
 122         QActionGroup *in_padding_group = new QActionGroup(ui->in_padding_menu);
 123         in_padding_group->addAction(ui->in_padding_0_action);
 124         in_padding_group->addAction(ui->in_padding_1_action);
 125         in_padding_group->addAction(ui->in_padding_2_action);
 126         in_padding_group->addAction(ui->in_padding_5_action);
 127         if (global_flags.cue_in_point_padding_seconds <= 1e-3) {
 128                 ui->in_padding_0_action->setChecked(true);
 129         } else if (fabs(global_flags.cue_in_point_padding_seconds - 1.0) < 1e-3) {
 130                 ui->in_padding_1_action->setChecked(true);
 131         } else if (fabs(global_flags.cue_in_point_padding_seconds - 2.0) < 1e-3) {
 132                 ui->in_padding_2_action->setChecked(true);
 133         } else if (fabs(global_flags.cue_in_point_padding_seconds - 5.0) < 1e-3) {
 134                 ui->in_padding_5_action->setChecked(true);
 135         } else {
 136                 // Nothing to check, which is fine.
 137         }
 138         connect(ui->in_padding_0_action, &QAction::toggled, bind(&MainWindow::in_padding_toggled, this, 0.0, _1));
 139         connect(ui->in_padding_1_action, &QAction::toggled, bind(&MainWindow::in_padding_toggled, this, 1.0, _1));
 140         connect(ui->in_padding_2_action, &QAction::toggled, bind(&MainWindow::in_padding_toggled, this, 2.0, _1));
 141         connect(ui->in_padding_5_action, &QAction::toggled, bind(&MainWindow::in_padding_toggled, this, 5.0, _1));
 142
 143         // Same for the cue-out padding.
 144         QActionGroup *out_padding_group = new QActionGroup(ui->out_padding_menu);
 145         out_padding_group->addAction(ui->out_padding_0_action);
 146         out_padding_group->addAction(ui->out_padding_1_action);
 147         out_padding_group->addAction(ui->out_padding_2_action);
 148         out_padding_group->addAction(ui->out_padding_5_action);
 149         if (global_flags.cue_out_point_padding_seconds <= 1e-3) {
 150                 ui->out_padding_0_action->setChecked(true);
 151         } else if (fabs(global_flags.cue_out_point_padding_seconds - 1.0) < 1e-3) {
 152                 ui->out_padding_1_action->setChecked(true);
 153         } else if (fabs(global_flags.cue_out_point_padding_seconds - 2.0) < 1e-3) {
 154                 ui->out_padding_2_action->setChecked(true);
 155         } else if (fabs(global_flags.cue_out_point_padding_seconds - 5.0) < 1e-3) {
 156                 ui->out_padding_5_action->setChecked(true);
 157         } else {
 158                 // Nothing to check, which is fine.
 159         }
 160         connect(ui->out_padding_0_action, &QAction::toggled, bind(&MainWindow::out_padding_toggled, this, 0.0, _1));
 161         connect(ui->out_padding_1_action, &QAction::toggled, bind(&MainWindow::out_padding_toggled, this, 1.0, _1));
 162         connect(ui->out_padding_2_action, &QAction::toggled, bind(&MainWindow::out_padding_toggled, this, 2.0, _1));
 163         connect(ui->out_padding_5_action, &QAction::toggled, bind(&MainWindow::out_padding_toggled, this, 5.0, _1));
 164
 165         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 166         disk_free_label = new QLabel(this);
 167         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 168         ui->menuBar->setCornerWidget(disk_free_label);
 169
 170         StateProto state = db.get_state();
 171         undo_stack.push_back(state);  // The undo stack always has the current state on top.
 172
 173         cliplist_clips = new ClipList(state.clip_list());
 174         ui->clip_list->setModel(cliplist_clips);
 175         connect(cliplist_clips, &ClipList::any_content_changed, this, &MainWindow::content_changed);
 176
 177         playlist_clips = new PlayList(state.play_list());
 178         ui->playlist->setModel(playlist_clips);
 179         connect(playlist_clips, &PlayList::any_content_changed, this, &MainWindow::content_changed);
 180
 181         // For un-highlighting when we lose focus.
 182         ui->clip_list->installEventFilter(this);
 183
 184         // For scrubbing in the pts columns.
 185         ui->clip_list->viewport()->installEventFilter(this);
 186         ui->playlist->viewport()->installEventFilter(this);
 187
 188         QShortcut *cue_in = new QShortcut(QKeySequence(Qt::Key_A), this);
 189         connect(cue_in, &QShortcut::activated, ui->cue_in_btn, &QPushButton::click);
 190         connect(ui->cue_in_btn, &QPushButton::clicked, this, &MainWindow::cue_in_clicked);
 191
 192         QShortcut *cue_out = new QShortcut(QKeySequence(Qt::Key_S), this);
 193         connect(cue_out, &QShortcut::activated, ui->cue_out_btn, &QPushButton::click);
 194         connect(ui->cue_out_btn, &QPushButton::clicked, this, &MainWindow::cue_out_clicked);
 195
 196         QShortcut *queue = new QShortcut(QKeySequence(Qt::Key_Q), this);
 197         connect(queue, &QShortcut::activated, ui->queue_btn, &QPushButton::click);
 198         connect(ui->queue_btn, &QPushButton::clicked, this, &MainWindow::queue_clicked);
 199
 200         QShortcut *preview = new QShortcut(QKeySequence(Qt::Key_W), this);
 201         connect(preview, &QShortcut::activated, ui->preview_btn, &QPushButton::click);
 202         connect(ui->preview_btn, &QPushButton::clicked, this, &MainWindow::preview_clicked);
 203
 204         QShortcut *play = new QShortcut(QKeySequence(Qt::Key_Space), this);
 205         connect(play, &QShortcut::activated, ui->play_btn, &QPushButton::click);
 206         connect(ui->play_btn, &QPushButton::clicked, this, &MainWindow::play_clicked);
 207
 208         QShortcut *next = new QShortcut(QKeySequence(Qt::Key_N), this);
 209         connect(next, &QShortcut::activated, ui->next_btn, &QPushButton::click);
 210         connect(ui->next_btn, &QPushButton::clicked, this, &MainWindow::next_clicked);
 211
 212         connect(ui->stop_btn, &QPushButton::clicked, this, &MainWindow::stop_clicked);
 213         ui->stop_btn->setEnabled(false);
 214
 215         connect(ui->speed_slider, &QAbstractSlider::valueChanged, this, &MainWindow::speed_slider_changed);
 216         connect(ui->speed_lock_btn, &QPushButton::clicked, this, &MainWindow::speed_lock_clicked);
 217
 218         connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 219
 220         connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
 221         QShortcut *delete_key = new QShortcut(QKeySequence(Qt::Key_Delete), ui->playlist);
 222         connect(delete_key, &QShortcut::activated, [this] {
 223                 if (ui->playlist->hasFocus()) {
 224                         playlist_remove();
 225                 }
 226         });
 227
 228         // TODO: support drag-and-drop.
 229         connect(ui->playlist_move_up_btn, &QPushButton::clicked, [this] { playlist_move(-1); });
 230         connect(ui->playlist_move_down_btn, &QPushButton::clicked, [this] { playlist_move(1); });
 231
 232         connect(ui->playlist->selectionModel(), &QItemSelectionModel::selectionChanged,
 233                 this, &MainWindow::playlist_selection_changed);
 234         playlist_selection_changed();  // First time set-up.
 235
 236         preview_player.reset(new Player(ui->preview_display, Player::NO_STREAM_OUTPUT));
 237         preview_player->set_done_callback([this] {
 238                 post_to_main_thread([this] {
 239                         preview_player_done();
 240                 });
 241         });
 242
 243         live_player.reset(new Player(ui->live_display, Player::HTTPD_STREAM_OUTPUT));
 244         live_player->set_done_callback([this] {
 245                 post_to_main_thread([this] {
 246                         live_player_done();
 247                 });
 248         });
 249         live_player->set_progress_callback([this](const map<uint64_t, double> &progress, double time_remaining) {
 250                 post_to_main_thread([this, progress, time_remaining] {
 251                         live_player_clip_progress(progress, time_remaining);
 252                 });
 253         });
 254         set_output_status("paused");
 255         enable_or_disable_queue_button();
 256
 257         defer_timeout = new QTimer(this);
 258         defer_timeout->setSingleShot(true);
 259         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 260         ui->undo_action->setEnabled(true);
 261
 262         lock_blink_timeout = new QTimer(this);
 263         lock_blink_timeout->setSingleShot(true);
 264         connect(lock_blink_timeout, &QTimer::timeout, this, &MainWindow::lock_blink_timer_expired);
 265
 266         connect(ui->clip_list->selectionModel(), &QItemSelectionModel::currentChanged,
 267                 this, &MainWindow::clip_list_selection_changed);
 268         enable_or_disable_queue_button();
 269
 270         // Find out how many cameras we have in the existing frames;
 271         // if none, we start with two cameras.
 272         num_cameras = 2;
 273         {
 274                 lock_guard<mutex> lock(frame_mu);
 275                 for (size_t stream_idx = 2; stream_idx < MAX_STREAMS; ++stream_idx) {
 276                         if (!frames[stream_idx].empty()) {
 277                                 num_cameras = stream_idx + 1;
 278                         }
 279                 }
 280         }
 281         change_num_cameras();
 282
 283         if (!global_flags.tally_url.empty()) {
 284                 start_tally();
 285         }
 286
 287         if (!global_flags.midi_mapping_filename.empty()) {
 288                 MIDIMappingProto midi_mapping;
 289                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 290                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 291                                 global_flags.midi_mapping_filename.c_str());
 292                         exit(1);
 293                 }
 294                 midi_mapper.set_midi_mapping(midi_mapping);
 295         }
 296         midi_mapper.refresh_lights();
 297         midi_mapper.start_thread();
 298 }
 299
 300 void MainWindow::change_num_cameras()
 301 {
 302         assert(num_cameras >= displays.size());  // We only add, never remove.
 303
 304         // Make new entries to hide the displays.
 305         for (unsigned i = displays.size(); i < num_cameras; ++i) {
 306                 char title[256];
 307                 snprintf(title, sizeof(title), "Camera %u", i + 1);
 308                 QAction *hide_action = ui->hide_camera_menu->addAction(title);
 309                 hide_action->setCheckable(true);
 310                 hide_action->setChecked(false);
 311                 connect(hide_action, &QAction::toggled, bind(&MainWindow::hide_camera_toggled, this, i, _1));
 312         }
 313
 314         // Make new display rows.
 315         for (unsigned i = displays.size(); i < num_cameras; ++i) {
 316                 QFrame *frame = new QFrame(this);
 317                 frame->setAutoFillBackground(true);
 318
 319                 QLayout *layout = new QGridLayout(frame);
 320                 frame->setLayout(layout);
 321                 layout->setContentsMargins(3, 3, 3, 3);
 322
 323                 JPEGFrameView *display = new JPEGFrameView(frame);
 324                 display->setAutoFillBackground(true);
 325                 layout->addWidget(display);
 326
 327                 display->set_overlay(to_string(i + 1));
 328
 329                 QPushButton *preview_btn = new QPushButton(this);
 330                 preview_btn->setMaximumSize(20, 17);
 331                 preview_btn->setText(QString::fromStdString(to_string(i + 1)));
 332                 ui->preview_layout->addWidget(preview_btn);
 333
 334                 displays.emplace_back(FrameAndDisplay{ frame, display, preview_btn, /*hidden=*/false });
 335
 336                 connect(display, &JPEGFrameView::clicked, preview_btn, &QPushButton::click);
 337                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 338                 connect(shortcut, &QShortcut::activated, preview_btn, &QPushButton::click);
 339
 340                 connect(preview_btn, &QPushButton::clicked, [this, i] { preview_angle_clicked(i); });
 341         }
 342         relayout_displays();
 343
 344         cliplist_clips->change_num_cameras(num_cameras);
 345         playlist_clips->change_num_cameras(num_cameras);
 346
 347         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 348 }
 349
 350 void MainWindow::relayout_displays()
 351 {
 352         while (ui->input_displays->count() > 0) {
 353                 QLayoutItem *item = ui->input_displays->takeAt(0);
 354                 ui->input_displays->removeWidget(item->widget());
 355         }
 356
 357         unsigned cell_idx = 0;
 358         for (unsigned i = 0; i < displays.size(); ++i) {
 359                 if (displays[i].hidden) {
 360                         displays[i].frame->setVisible(false);
 361                 } else {
 362                         displays[i].frame->setVisible(true);
 363                         ui->input_displays->addWidget(displays[i].frame, cell_idx / 2, cell_idx % 2);
 364                         ++cell_idx;
 365                 }
 366         }
 367         ui->video_displays->setStretch(1, (cell_idx + 1) / 2);
 368
 369         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 370 }
 371
 372 MainWindow::~MainWindow()
 373 {
 374         // We don't have a context to release Player's OpenGL resources in here,
 375         // so instead of crashing on exit, leak it.
 376         live_player.release();
 377         preview_player.release();
 378 }
 379
 380 void MainWindow::cue_in_clicked()
 381 {
 382         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 383                 cliplist_clips->mutable_back()->pts_in = current_pts;
 384         } else {
 385                 Clip clip;
 386                 clip.pts_in = max<int64_t>(current_pts - lrint(global_flags.cue_in_point_padding_seconds * TIMEBASE), 0);
 387                 cliplist_clips->add_clip(clip);
 388                 playlist_selection_changed();
 389         }
 390
 391         // Select the item so that we can jog it.
 392         ui->clip_list->setFocus();
 393         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::IN));
 394         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 395         ui->clip_list->scrollToBottom();
 396         enable_or_disable_queue_button();
 397 }
 398
 399 void MainWindow::cue_out_clicked()
 400 {
 401         if (cliplist_clips->empty()) {
 402                 return;
 403         }
 404
 405         cliplist_clips->mutable_back()->pts_out = current_pts + lrint(global_flags.cue_out_point_padding_seconds * TIMEBASE);
 406
 407         // Select the item so that we can jog it.
 408         ui->clip_list->setFocus();
 409         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::OUT));
 410         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 411         ui->clip_list->scrollToBottom();
 412         enable_or_disable_queue_button();
 413 }
 414
 415 void MainWindow::queue_clicked()
 416 {
 417         // See also enable_or_disable_queue_button().
 418
 419         if (cliplist_clips->empty()) {
 420                 return;
 421         }
 422
 423         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 424         if (!selected->hasSelection()) {
 425                 Clip clip = *cliplist_clips->back();
 426                 clip.stream_idx = 0;
 427                 if (clip.pts_out != -1) {
 428                         playlist_clips->add_clip(clip);
 429                         playlist_selection_changed();
 430                         ui->playlist->scrollToBottom();
 431                 }
 432                 return;
 433         }
 434
 435         QModelIndex index = selected->currentIndex();
 436         Clip clip = *cliplist_clips->clip(index.row());
 437         if (cliplist_clips->is_camera_column(index.column())) {
 438                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 439         } else {
 440                 clip.stream_idx = ui->preview_display->get_stream_idx();
 441         }
 442
 443         if (clip.pts_out != -1) {
 444                 playlist_clips->add_clip(clip);
 445                 playlist_selection_changed();
 446                 ui->playlist->scrollToBottom();
 447                 if (!ui->playlist->selectionModel()->hasSelection()) {
 448                         // TODO: Figure out why this doesn't always seem to actually select the row.
 449                         QModelIndex bottom = playlist_clips->index(playlist_clips->size() - 1, 0);
 450                         ui->playlist->setCurrentIndex(bottom);
 451                 }
 452         }
 453 }
 454
 455 void MainWindow::preview_clicked()
 456 {
 457         // See also enable_or_disable_preview_button().
 458
 459         if (ui->playlist->hasFocus()) {
 460                 // Allow the playlist as preview iff it has focus and something is selected.
 461                 QItemSelectionModel *selected = ui->playlist->selectionModel();
 462                 if (selected->hasSelection()) {
 463                         QModelIndex index = selected->currentIndex();
 464                         const Clip &clip = *playlist_clips->clip(index.row());
 465                         preview_player->play(clip);
 466                         preview_playing = true;
 467                         enable_or_disable_preview_button();
 468                         return;
 469                 }
 470         }
 471
 472         if (cliplist_clips->empty())
 473                 return;
 474
 475         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 476         if (!selected->hasSelection()) {
 477                 preview_player->play(*cliplist_clips->back());
 478                 preview_playing = true;
 479                 enable_or_disable_preview_button();
 480                 return;
 481         }
 482
 483         QModelIndex index = selected->currentIndex();
 484         Clip clip = *cliplist_clips->clip(index.row());
 485         if (cliplist_clips->is_camera_column(index.column())) {
 486                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 487         } else {
 488                 clip.stream_idx = ui->preview_display->get_stream_idx();
 489         }
 490         preview_player->play(clip);
 491         preview_playing = true;
 492         enable_or_disable_preview_button();
 493 }
 494
 495 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 496 {
 497         preview_player->override_angle(stream_idx);
 498
 499         // Change the selection if we were previewing a clip from the clip list.
 500         // (The only other thing we could be showing is a pts scrub, and if so,
 501         // that would be selected.)
 502         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 503         if (selected->hasSelection()) {
 504                 QModelIndex cell = selected->selectedIndexes()[0];
 505                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 506                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 507         }
 508 }
 509
 510 void MainWindow::playlist_duplicate()
 511 {
 512         QItemSelectionModel *selected = ui->playlist->selectionModel();
 513         if (!selected->hasSelection()) {
 514                 // Should have been grayed out, but OK.
 515                 return;
 516         }
 517         QModelIndexList rows = selected->selectedRows();
 518         int first = rows.front().row(), last = rows.back().row();
 519         playlist_clips->duplicate_clips(first, last);
 520         playlist_selection_changed();
 521 }
 522
 523 void MainWindow::playlist_remove()
 524 {
 525         QItemSelectionModel *selected = ui->playlist->selectionModel();
 526         if (!selected->hasSelection()) {
 527                 // Should have been grayed out, but OK.
 528                 return;
 529         }
 530         QModelIndexList rows = selected->selectedRows();
 531         int first = rows.front().row(), last = rows.back().row();
 532         playlist_clips->erase_clips(first, last);
 533
 534         // TODO: select the next one in the list?
 535
 536         playlist_selection_changed();
 537 }
 538
 539 void MainWindow::playlist_move(int delta)
 540 {
 541         QItemSelectionModel *selected = ui->playlist->selectionModel();
 542         if (!selected->hasSelection()) {
 543                 // Should have been grayed out, but OK.
 544                 return;
 545         }
 546
 547         QModelIndexList rows = selected->selectedRows();
 548         int first = rows.front().row(), last = rows.back().row();
 549         if ((delta == -1 && first == 0) ||
 550             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 551                 // Should have been grayed out, but OK.
 552                 return;
 553         }
 554
 555         playlist_clips->move_clips(first, last, delta);
 556         playlist_selection_changed();
 557 }
 558
 559 void MainWindow::jog_internal(JogDestination jog_destination, int row, int column, int stream_idx, int pts_delta)
 560 {
 561         constexpr int camera_pts_per_pixel = 1500;  // One click of most mice (15 degrees), multiplied by the default wheel_sensitivity.
 562
 563         int in_column, out_column, camera_column;
 564         if (jog_destination == JOG_CLIP_LIST) {
 565                 in_column = int(ClipList::Column::IN);
 566                 out_column = int(ClipList::Column::OUT);
 567                 camera_column = -1;
 568         } else if (jog_destination == JOG_PLAYLIST) {
 569                 in_column = int(PlayList::Column::IN);
 570                 out_column = int(PlayList::Column::OUT);
 571                 camera_column = int(PlayList::Column::CAMERA);
 572         } else {
 573                 assert(false);
 574         }
 575
 576         currently_deferring_model_changes = true;
 577         {
 578                 current_change_id = (jog_destination == JOG_CLIP_LIST) ? "cliplist:" : "playlist:";
 579                 ClipProxy clip = (jog_destination == JOG_CLIP_LIST) ? cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 580                 if (jog_destination == JOG_PLAYLIST) {
 581                         stream_idx = clip->stream_idx;
 582                 }
 583
 584                 if (column == in_column) {
 585                         current_change_id += "in:" + to_string(row);
 586                         int64_t pts = clip->pts_in + pts_delta;
 587                         set_pts_in(pts, current_pts, clip);
 588                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 589                 } else if (column == out_column) {
 590                         current_change_id += "out:" + to_string(row);
 591                         int64_t pts = clip->pts_out + pts_delta;
 592                         pts = std::max(pts, clip->pts_in);
 593                         pts = std::min(pts, current_pts);
 594                         clip->pts_out = pts;
 595                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 596                 } else if (column == camera_column) {
 597                         current_change_id += "camera:" + to_string(row);
 598                         int angle_degrees = pts_delta;
 599                         if (last_mousewheel_camera_row == row) {
 600                                 angle_degrees += leftover_angle_degrees;
 601                         }
 602
 603                         int stream_idx = clip->stream_idx + angle_degrees / camera_pts_per_pixel;
 604                         stream_idx = std::max(stream_idx, 0);
 605                         stream_idx = std::min<int>(stream_idx, num_cameras - 1);
 606                         clip->stream_idx = stream_idx;
 607
 608                         last_mousewheel_camera_row = row;
 609                         leftover_angle_degrees = angle_degrees % camera_pts_per_pixel;
 610
 611                         // Don't update the live view, that's rarely what the operator wants.
 612                 }
 613         }
 614         currently_deferring_model_changes = false;
 615 }
 616
 617 void MainWindow::defer_timer_expired()
 618 {
 619         state_changed(deferred_state);
 620 }
 621
 622 void MainWindow::content_changed()
 623 {
 624         // If we are playing, update the part of the playlist that's not playing yet.
 625         vector<ClipWithID> clips;
 626         for (unsigned row = 0; row < playlist_clips->size(); ++row) {
 627                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 628         }
 629         live_player->splice_play(clips);
 630
 631         // Serialize the state.
 632         if (defer_timeout->isActive() &&
 633             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 634                 // There's some deferred event waiting, but this event is unrelated.
 635                 // So it's time to short-circuit that timer and do the work it wanted to do.
 636                 defer_timeout->stop();
 637                 state_changed(deferred_state);
 638         }
 639         StateProto state;
 640         *state.mutable_clip_list() = cliplist_clips->serialize();
 641         *state.mutable_play_list() = playlist_clips->serialize();
 642         if (currently_deferring_model_changes) {
 643                 deferred_change_id = current_change_id;
 644                 deferred_state = std::move(state);
 645                 defer_timeout->start(200);
 646                 return;
 647         }
 648         state_changed(state);
 649 }
 650
 651 void MainWindow::state_changed(const StateProto &state)
 652 {
 653         db.store_state(state);
 654
 655         redo_stack.clear();
 656         ui->redo_action->setEnabled(false);
 657
 658         undo_stack.push_back(state);
 659         ui->undo_action->setEnabled(undo_stack.size() > 1);
 660
 661         // Make sure it doesn't grow without bounds.
 662         while (undo_stack.size() >= 100) {
 663                 undo_stack.pop_front();
 664         }
 665 }
 666
 667 void MainWindow::save_settings()
 668 {
 669         SettingsProto settings;
 670         settings.set_interpolation_quality(global_flags.interpolation_quality + 1);
 671         settings.set_cue_in_point_padding_seconds(global_flags.cue_in_point_padding_seconds);
 672         settings.set_cue_out_point_padding_seconds(global_flags.cue_out_point_padding_seconds);
 673         db.store_settings(settings);
 674 }
 675
 676 void MainWindow::lock_blink_timer_expired()
 677 {
 678         midi_mapper.set_locked(MIDIMapper::LightState(ui->speed_lock_btn->isChecked()));  // Presumably On, or the timer should have been canceled.
 679 }
 680
 681 void MainWindow::play_clicked()
 682 {
 683         QItemSelectionModel *selected = ui->playlist->selectionModel();
 684         if (!selected->hasSelection()) {
 685                 return;
 686         }
 687         unsigned start_row = selected->selectedRows(0)[0].row();
 688
 689         vector<ClipWithID> clips;
 690         for (unsigned row = start_row; row < playlist_clips->size(); ++row) {
 691                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 692         }
 693         live_player->play(clips);
 694         playlist_clips->set_progress({ { start_row, 0.0f } });
 695         ui->playlist->selectionModel()->clear();
 696         ui->stop_btn->setEnabled(true);
 697         playlist_selection_changed();
 698 }
 699
 700 void MainWindow::next_clicked()
 701 {
 702         live_player->skip_to_next();
 703 }
 704
 705 void MainWindow::stop_clicked()
 706 {
 707         Clip fake_clip;
 708         fake_clip.pts_in = 0;
 709         fake_clip.pts_out = 0;
 710         playlist_clips->set_progress({});
 711         live_player->play(fake_clip);
 712         ui->stop_btn->setEnabled(false);
 713         playlist_selection_changed();
 714 }
 715
 716 void MainWindow::speed_slider_changed(int percent)
 717 {
 718         float speed = percent / 100.0f;
 719         ui->speed_lock_btn->setText(QString::fromStdString(" " + to_string(percent) + "%"));
 720         live_player->set_master_speed(speed);
 721         midi_mapper.set_speed_light(speed);
 722 }
 723
 724 void MainWindow::speed_lock_clicked()
 725 {
 726         // TODO: Make for a less abrupt transition if we're not already at 100%.
 727         ui->speed_slider->setValue(100);  // Also actually sets the master speed and updates the label.
 728         ui->speed_slider->setEnabled(!ui->speed_lock_btn->isChecked());
 729         midi_mapper.set_locked(MIDIMapper::LightState(ui->speed_lock_btn->isChecked()));
 730         lock_blink_timeout->stop();
 731 }
 732
 733 void MainWindow::preview_player_done()
 734 {
 735         preview_playing = false;
 736         enable_or_disable_preview_button();
 737 }
 738
 739 void MainWindow::live_player_done()
 740 {
 741         playlist_clips->set_progress({});
 742         ui->stop_btn->setEnabled(false);
 743         playlist_selection_changed();
 744 }
 745
 746 void MainWindow::live_player_clip_progress(const map<uint64_t, double> &progress, double time_remaining)
 747 {
 748         playlist_clips->set_progress(progress);
 749         set_output_status(format_duration(time_remaining) + " left");
 750 }
 751
 752 void MainWindow::resizeEvent(QResizeEvent *event)
 753 {
 754         QMainWindow::resizeEvent(event);
 755
 756         // Ask for a relayout, but only after the event loop is done doing relayout
 757         // on everything else.
 758         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 759 }
 760
 761 void MainWindow::relayout()
 762 {
 763         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 764         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 765 }
 766
 767 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 768 {
 769         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 770         int scrub_sensitivity = 100;  // pts units per pixel.
 771         int wheel_sensitivity = 100;  // pts units per degree.
 772
 773         if (event->type() == QEvent::FocusIn || event->type() == QEvent::FocusOut) {
 774                 enable_or_disable_preview_button();
 775                 playlist_selection_changed();
 776                 hidden_jog_column = -1;
 777         }
 778
 779         unsigned stream_idx = ui->preview_display->get_stream_idx();
 780
 781         if (watched == ui->clip_list) {
 782                 if (event->type() == QEvent::FocusOut) {
 783                         highlight_camera_input(-1);
 784                 }
 785                 return false;
 786         }
 787
 788         if (event->type() != QEvent::Wheel) {
 789                 last_mousewheel_camera_row = -1;
 790         }
 791
 792         if (event->type() == QEvent::MouseButtonPress) {
 793                 QMouseEvent *mouse = (QMouseEvent *)event;
 794
 795                 QTableView *destination;
 796                 ScrubType type;
 797
 798                 if (watched == ui->clip_list->viewport()) {
 799                         destination = ui->clip_list;
 800                         type = SCRUBBING_CLIP_LIST;
 801                 } else if (watched == ui->playlist->viewport()) {
 802                         destination = ui->playlist;
 803                         type = SCRUBBING_PLAYLIST;
 804                 } else {
 805                         return false;
 806                 }
 807                 int column = destination->columnAt(mouse->x());
 808                 int row = destination->rowAt(mouse->y());
 809                 if (column == -1 || row == -1)
 810                         return false;
 811
 812                 if (type == SCRUBBING_CLIP_LIST) {
 813                         if (ClipList::Column(column) == ClipList::Column::IN) {
 814                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 815                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 816                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 817                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 818                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 819                         } else {
 820                                 return false;
 821                         }
 822                 } else {
 823                         if (PlayList::Column(column) == PlayList::Column::IN) {
 824                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 825                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 826                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 827                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 828                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 829                         } else {
 830                                 return false;
 831                         }
 832                 }
 833
 834                 scrubbing = true;
 835                 scrub_row = row;
 836                 scrub_column = column;
 837                 scrub_x_origin = mouse->x();
 838                 scrub_type = type;
 839         } else if (event->type() == QEvent::MouseMove) {
 840                 QMouseEvent *mouse = (QMouseEvent *)event;
 841                 if (mouse->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 842                         scrub_sensitivity *= 10;
 843                         wheel_sensitivity *= 10;
 844                 }
 845                 if (mouse->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 846                         scrub_sensitivity /= 10;
 847                         wheel_sensitivity /= 10;
 848                 }
 849                 if (scrubbing) {
 850                         int offset = mouse->x() - scrub_x_origin;
 851                         int adjusted_offset;
 852                         if (offset >= dead_zone_pixels) {
 853                                 adjusted_offset = offset - dead_zone_pixels;
 854                         } else if (offset < -dead_zone_pixels) {
 855                                 adjusted_offset = offset + dead_zone_pixels;
 856                         } else {
 857                                 adjusted_offset = 0;
 858                         }
 859
 860                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 861                         currently_deferring_model_changes = true;
 862                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 863                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 864                                 if (scrub_column == int(ClipList::Column::IN)) {
 865                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 866                                         set_pts_in(pts, current_pts, clip);
 867                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 868                                 } else {
 869                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 870                                         pts = std::max(pts, clip->pts_in);
 871                                         pts = std::min(pts, current_pts);
 872                                         clip->pts_out = pts;
 873                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 874                                 }
 875                         } else {
 876                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 877                                 if (scrub_column == int(PlayList::Column::IN)) {
 878                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 879                                         set_pts_in(pts, current_pts, clip);
 880                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 881                                 } else {
 882                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 883                                         pts = std::max(pts, clip->pts_in);
 884                                         pts = std::min(pts, current_pts);
 885                                         clip->pts_out = pts;
 886                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 887                                 }
 888                         }
 889                         currently_deferring_model_changes = false;
 890
 891                         return true;  // Don't use this mouse movement for selecting things.
 892                 }
 893         } else if (event->type() == QEvent::Wheel) {
 894                 QWheelEvent *wheel = (QWheelEvent *)event;
 895                 int angle_delta = wheel->angleDelta().y();
 896                 if (wheel->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 897                         scrub_sensitivity *= 10;
 898                         wheel_sensitivity *= 10;
 899                 }
 900                 if (wheel->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 901                         scrub_sensitivity /= 10;
 902                         wheel_sensitivity /= 10;
 903                         angle_delta = wheel->angleDelta().x();  // Qt ickiness.
 904                 }
 905
 906                 QTableView *destination;
 907                 JogDestination jog_destination;
 908                 if (watched == ui->clip_list->viewport()) {
 909                         destination = ui->clip_list;
 910                         jog_destination = JOG_CLIP_LIST;
 911                         last_mousewheel_camera_row = -1;
 912                 } else if (watched == ui->playlist->viewport()) {
 913                         destination = ui->playlist;
 914                         jog_destination = JOG_PLAYLIST;
 915                         if (destination->columnAt(wheel->x()) != int(PlayList::Column::CAMERA)) {
 916                                 last_mousewheel_camera_row = -1;
 917                         }
 918                 } else {
 919                         last_mousewheel_camera_row = -1;
 920                         return false;
 921                 }
 922
 923                 int column = destination->columnAt(wheel->x());
 924                 int row = destination->rowAt(wheel->y());
 925                 if (column == -1 || row == -1)
 926                         return false;
 927
 928                 // Only adjust pts with the wheel if the given row is selected.
 929                 if (!destination->hasFocus() ||
 930                     row != destination->selectionModel()->currentIndex().row()) {
 931                         return false;
 932                 }
 933
 934                 jog_internal(jog_destination, row, column, stream_idx, angle_delta * wheel_sensitivity);
 935                 return true;  // Don't scroll.
 936         } else if (event->type() == QEvent::MouseButtonRelease) {
 937                 scrubbing = false;
 938         }
 939         return false;
 940 }
 941
 942 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 943 {
 944         if (rounding == LAST_BEFORE) {
 945                 lock_guard<mutex> lock(frame_mu);
 946                 if (frames[stream_idx].empty())
 947                         return;
 948                 auto it = find_last_frame_before(frames[stream_idx], pts);
 949                 if (it != frames[stream_idx].end()) {
 950                         pts = it->pts;
 951                 }
 952         } else {
 953                 assert(rounding == FIRST_AT_OR_AFTER);
 954                 lock_guard<mutex> lock(frame_mu);
 955                 if (frames[stream_idx].empty())
 956                         return;
 957                 auto it = find_first_frame_at_or_after(frames[stream_idx], pts);
 958                 if (it != frames[stream_idx].end()) {
 959                         pts = it->pts;
 960                 }
 961         }
 962
 963         Clip fake_clip;
 964         fake_clip.pts_in = pts;
 965         fake_clip.pts_out = pts + 1;
 966         fake_clip.stream_idx = stream_idx;
 967         preview_player->play(fake_clip);
 968 }
 969
 970 void MainWindow::playlist_selection_changed()
 971 {
 972         enable_or_disable_preview_button();
 973
 974         QItemSelectionModel *selected = ui->playlist->selectionModel();
 975         bool any_selected = selected->hasSelection();
 976         ui->playlist_duplicate_btn->setEnabled(any_selected);
 977         ui->playlist_remove_btn->setEnabled(any_selected);
 978         ui->playlist_move_up_btn->setEnabled(
 979                 any_selected && selected->selectedRows().front().row() > 0);
 980         ui->playlist_move_down_btn->setEnabled(
 981                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 982
 983         ui->play_btn->setEnabled(any_selected);
 984         ui->next_btn->setEnabled(ui->stop_btn->isEnabled());  // TODO: Perhaps not if we're on the last clip?
 985         midi_mapper.set_next_ready(ui->next_btn->isEnabled() ? MIDIMapper::On : MIDIMapper::Off);
 986
 987         // NOTE: The hidden button is still reachable by keyboard or MIDI.
 988         if (any_selected) {
 989                 ui->play_btn->setVisible(true);
 990         } else if (ui->stop_btn->isEnabled()) {  // Playing.
 991                 ui->play_btn->setVisible(false);
 992         } else {
 993                 ui->play_btn->setVisible(true);
 994         }
 995         ui->next_btn->setVisible(!ui->play_btn->isVisible());
 996
 997         if (ui->stop_btn->isEnabled()) {  // Playing.
 998                 midi_mapper.set_play_enabled(MIDIMapper::On);
 999         } else if (any_selected) {
1000                 midi_mapper.set_play_enabled(MIDIMapper::Blinking);
1001         } else {
1002                 midi_mapper.set_play_enabled(MIDIMapper::Off);
1003         }
1004
1005         if (!any_selected) {
1006                 set_output_status("paused");
1007         } else {
1008                 vector<ClipWithID> clips;
1009                 for (size_t row = selected->selectedRows().front().row(); row < playlist_clips->size(); ++row) {
1010                         clips.emplace_back(*playlist_clips->clip_with_id(row));
1011                 }
1012                 double remaining = compute_total_time(clips);
1013                 set_output_status(format_duration(remaining) + " ready");
1014         }
1015 }
1016
1017 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &previous)
1018 {
1019         int camera_selected = -1;
1020         if (cliplist_clips->is_camera_column(current.column())) {
1021                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
1022
1023                 // See the comment on hidden_jog_column.
1024                 if (current.row() != previous.row()) {
1025                         hidden_jog_column = -1;
1026                 } else if (hidden_jog_column == -1) {
1027                         hidden_jog_column = previous.column();
1028                 }
1029         } else {
1030                 hidden_jog_column = -1;
1031         }
1032         highlight_camera_input(camera_selected);
1033         enable_or_disable_queue_button();
1034 }
1035
1036 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
1037 {
1038         char time_str[256];
1039         if (estimated_seconds_left < 60.0) {
1040                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
1041         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
1042                 int s = lrintf(estimated_seconds_left);
1043                 int m = s / 60;
1044                 s %= 60;
1045                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
1046         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
1047                 int m = lrintf(estimated_seconds_left / 60.0);
1048                 snprintf(time_str, sizeof(time_str), "%dm", m);
1049         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
1050                 int m = lrintf(estimated_seconds_left / 60.0);
1051                 int h = m / 60;
1052                 m %= 60;
1053                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
1054         } else {  // More than ten hours: Xh.
1055                 int h = lrintf(estimated_seconds_left / 3600.0);
1056                 snprintf(time_str, sizeof(time_str), "%dh", h);
1057         }
1058         char buf[256];
1059         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
1060
1061         std::string label = buf;
1062
1063         post_to_main_thread([this, label] {
1064                 disk_free_label->setText(QString::fromStdString(label));
1065                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
1066         });
1067 }
1068
1069 void MainWindow::midi_mapping_triggered()
1070 {
1071         MIDIMappingDialog(&midi_mapper).exec();
1072 }
1073
1074 void MainWindow::exit_triggered()
1075 {
1076         close();
1077 }
1078
1079 void MainWindow::export_cliplist_clip_multitrack_triggered()
1080 {
1081         QItemSelectionModel *selected = ui->clip_list->selectionModel();
1082         if (!selected->hasSelection()) {
1083                 QMessageBox msgbox;
1084                 msgbox.setText("No clip selected in the clip list. Select one and try exporting again.");
1085                 msgbox.exec();
1086                 return;
1087         }
1088
1089         QModelIndex index = selected->currentIndex();
1090         Clip clip = *cliplist_clips->clip(index.row());
1091         QString filename = QFileDialog::getSaveFileName(this,
1092                 "Export multitrack clip", QString(), tr("Matroska video files (*.mkv)"));
1093         if (filename.isNull()) {
1094                 // Cancel.
1095                 return;
1096         }
1097         if (!filename.endsWith(".mkv")) {
1098                 filename += ".mkv";
1099         }
1100         export_multitrack_clip(filename.toStdString(), clip);
1101 }
1102
1103 void MainWindow::export_playlist_clip_interpolated_triggered()
1104 {
1105         QItemSelectionModel *selected = ui->playlist->selectionModel();
1106         if (!selected->hasSelection()) {
1107                 QMessageBox msgbox;
1108                 msgbox.setText("No clip selected in the playlist. Select one and try exporting again.");
1109                 msgbox.exec();
1110                 return;
1111         }
1112
1113         QString filename = QFileDialog::getSaveFileName(this,
1114                 "Export interpolated clip", QString(), tr("Matroska video files (*.mkv)"));
1115         if (filename.isNull()) {
1116                 // Cancel.
1117                 return;
1118         }
1119         if (!filename.endsWith(".mkv")) {
1120                 filename += ".mkv";
1121         }
1122
1123         vector<Clip> clips;
1124         QModelIndexList rows = selected->selectedRows();
1125         for (QModelIndex index : rows) {
1126                 clips.push_back(*playlist_clips->clip(index.row()));
1127         }
1128         export_interpolated_clip(filename.toStdString(), clips);
1129 }
1130
1131 void MainWindow::manual_triggered()
1132 {
1133         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
1134                 QMessageBox msgbox;
1135                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
1136                 msgbox.exec();
1137         }
1138 }
1139
1140 void MainWindow::about_triggered()
1141 {
1142         AboutDialog("Futatabi", "Multicamera slow motion video server").exec();
1143 }
1144
1145 void MainWindow::undo_triggered()
1146 {
1147         // Finish any deferred action.
1148         if (defer_timeout->isActive()) {
1149                 defer_timeout->stop();
1150                 state_changed(deferred_state);
1151         }
1152
1153         StateProto redo_state;
1154         *redo_state.mutable_clip_list() = cliplist_clips->serialize();
1155         *redo_state.mutable_play_list() = playlist_clips->serialize();
1156         redo_stack.push_back(std::move(redo_state));
1157         ui->redo_action->setEnabled(true);
1158
1159         assert(undo_stack.size() > 1);
1160
1161         // Pop off the current state, which is always at the top of the stack.
1162         undo_stack.pop_back();
1163
1164         StateProto state = undo_stack.back();
1165         ui->undo_action->setEnabled(undo_stack.size() > 1);
1166
1167         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
1168         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
1169
1170         db.store_state(state);
1171 }
1172
1173 void MainWindow::redo_triggered()
1174 {
1175         assert(!redo_stack.empty());
1176
1177         ui->undo_action->setEnabled(true);
1178         ui->redo_action->setEnabled(true);
1179
1180         undo_stack.push_back(std::move(redo_stack.back()));
1181         redo_stack.pop_back();
1182         ui->undo_action->setEnabled(true);
1183         ui->redo_action->setEnabled(!redo_stack.empty());
1184
1185         const StateProto &state = undo_stack.back();
1186         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
1187         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
1188
1189         db.store_state(state);
1190 }
1191
1192 void MainWindow::quality_toggled(int quality, bool checked)
1193 {
1194         if (!checked) {
1195                 return;
1196         }
1197         global_flags.interpolation_quality = quality;
1198         if (quality != 0 &&  // Turning interpolation off is always possible.
1199             quality != flow_initialized_interpolation_quality) {
1200                 QMessageBox msgbox;
1201                 msgbox.setText(QString::fromStdString(
1202                         "The interpolation quality for the main output cannot be changed at runtime, "
1203                         "except being turned completely off; it will take effect for exported files "
1204                         "only until next restart. The live output quality thus remains at " +
1205                         to_string(flow_initialized_interpolation_quality) + "."));
1206                 msgbox.exec();
1207         }
1208
1209         save_settings();
1210 }
1211
1212 void MainWindow::in_padding_toggled(double seconds, bool checked)
1213 {
1214         if (!checked) {
1215                 return;
1216         }
1217         global_flags.cue_in_point_padding_seconds = seconds;
1218         save_settings();
1219 }
1220
1221 void MainWindow::out_padding_toggled(double seconds, bool checked)
1222 {
1223         if (!checked) {
1224                 return;
1225         }
1226         global_flags.cue_out_point_padding_seconds = seconds;
1227         save_settings();
1228 }
1229
1230 void MainWindow::hide_camera_toggled(unsigned camera_idx, bool checked)
1231 {
1232         displays[camera_idx].hidden = checked;
1233         relayout_displays();
1234 }
1235
1236 void MainWindow::highlight_camera_input(int stream_idx)
1237 {
1238         for (unsigned i = 0; i < num_cameras; ++i) {
1239                 if (unsigned(stream_idx) == i) {
1240                         displays[i].frame->setStyleSheet("background: rgb(0,255,0)");
1241                 } else {
1242                         displays[i].frame->setStyleSheet("");
1243                 }
1244         }
1245         midi_mapper.highlight_camera_input(stream_idx);
1246 }
1247
1248 void MainWindow::enable_or_disable_preview_button()
1249 {
1250         // Follows the logic in preview_clicked().
1251
1252         if (ui->playlist->hasFocus()) {
1253                 // Allow the playlist as preview iff it has focus and something is selected.
1254                 // TODO: Is this part really relevant?
1255                 QItemSelectionModel *selected = ui->playlist->selectionModel();
1256                 if (selected->hasSelection()) {
1257                         ui->preview_btn->setEnabled(true);
1258                         midi_mapper.set_preview_enabled(preview_playing ? MIDIMapper::On : MIDIMapper::Blinking);
1259                         return;
1260                 }
1261         }
1262
1263         // TODO: Perhaps only enable this if something is actually selected.
1264         ui->preview_btn->setEnabled(!cliplist_clips->empty());
1265         if (preview_playing) {
1266                 midi_mapper.set_preview_enabled(MIDIMapper::On);
1267         } else {
1268                 midi_mapper.set_preview_enabled(cliplist_clips->empty() ? MIDIMapper::Off : MIDIMapper::Blinking);
1269         }
1270 }
1271
1272 void MainWindow::enable_or_disable_queue_button()
1273 {
1274         // Follows the logic in queue_clicked().
1275         // TODO: Perhaps only enable this if something is actually selected.
1276
1277         bool enabled;
1278
1279         if (cliplist_clips->empty()) {
1280                 enabled = false;
1281         } else {
1282                 QItemSelectionModel *selected = ui->clip_list->selectionModel();
1283                 if (!selected->hasSelection()) {
1284                         Clip clip = *cliplist_clips->back();
1285                         enabled = clip.pts_out != -1;
1286                 } else {
1287                         QModelIndex index = selected->currentIndex();
1288                         Clip clip = *cliplist_clips->clip(index.row());
1289                         enabled = clip.pts_out != -1;
1290                 }
1291         }
1292
1293         ui->queue_btn->setEnabled(enabled);
1294         midi_mapper.set_queue_enabled(enabled);
1295 }
1296
1297 void MainWindow::set_output_status(const string &status)
1298 {
1299         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
1300         if (live_player != nullptr) {
1301                 live_player->set_pause_status(status);
1302         }
1303
1304         lock_guard<mutex> lock(queue_status_mu);
1305         queue_status = status;
1306 }
1307
1308 pair<string, string> MainWindow::get_queue_status() const
1309 {
1310         lock_guard<mutex> lock(queue_status_mu);
1311         return { queue_status, "text/plain" };
1312 }
1313
1314 void MainWindow::display_frame(unsigned stream_idx, const FrameOnDisk &frame)
1315 {
1316         if (stream_idx >= MAX_STREAMS) {
1317                 fprintf(stderr, "WARNING: Ignoring too-high stream index %u.\n", stream_idx);
1318                 return;
1319         }
1320         if (stream_idx >= num_cameras) {
1321                 post_to_main_thread_and_wait([this, stream_idx] {
1322                         num_cameras = stream_idx + 1;
1323                         change_num_cameras();
1324                 });
1325         }
1326         displays[stream_idx].display->setFrame(stream_idx, frame);
1327 }
1328
1329 void MainWindow::preview()
1330 {
1331         post_to_main_thread([this] {
1332                 preview_clicked();
1333         });
1334 }
1335
1336 void MainWindow::queue()
1337 {
1338         post_to_main_thread([this] {
1339                 queue_clicked();
1340         });
1341 }
1342
1343 void MainWindow::play()
1344 {
1345         post_to_main_thread([this] {
1346                 play_clicked();
1347         });
1348 }
1349
1350 void MainWindow::next()
1351 {
1352         post_to_main_thread([this] {
1353                 next_clicked();
1354         });
1355 }
1356
1357 void MainWindow::toggle_lock()
1358 {
1359         post_to_main_thread([this] {
1360                 ui->speed_lock_btn->setChecked(!ui->speed_lock_btn->isChecked());
1361                 speed_lock_clicked();
1362         });
1363 }
1364
1365 void MainWindow::jog(int delta)
1366 {
1367         post_to_main_thread([this, delta] {
1368                 int64_t pts_delta = delta * (TIMEBASE / 60);  // One click = frame at 60 fps.
1369                 if (ui->playlist->hasFocus()) {
1370                         QModelIndex selected = ui->playlist->selectionModel()->currentIndex();
1371                         if (selected.column() != -1 && selected.row() != -1) {
1372                                 jog_internal(JOG_PLAYLIST, selected.row(), selected.column(), /*stream_idx=*/-1, pts_delta);
1373                         }
1374                 } else if (ui->clip_list->hasFocus()) {
1375                         QModelIndex selected = ui->clip_list->selectionModel()->currentIndex();
1376                         if (cliplist_clips->is_camera_column(selected.column()) &&
1377                             hidden_jog_column != -1) {
1378                                 // See the definition on hidden_jog_column.
1379                                 selected = selected.sibling(selected.row(), hidden_jog_column);
1380                                 ui->clip_list->selectionModel()->setCurrentIndex(selected, QItemSelectionModel::ClearAndSelect);
1381                                 hidden_jog_column = -1;
1382                         }
1383                         if (selected.column() != -1 && selected.row() != -1) {
1384                                 jog_internal(JOG_CLIP_LIST, selected.row(), selected.column(), ui->preview_display->get_stream_idx(), pts_delta);
1385                         }
1386                 }
1387         });
1388 }
1389
1390 void MainWindow::switch_camera(unsigned camera_idx)
1391 {
1392         post_to_main_thread([this, camera_idx] {
1393                 if (camera_idx < num_cameras) {  // TODO: Also make this change a highlighted clip?
1394                         preview_angle_clicked(camera_idx);
1395                 }
1396         });
1397 }
1398
1399 void MainWindow::set_master_speed(float speed)
1400 {
1401         speed = min(max(speed, 0.1f), 2.0f);
1402
1403         post_to_main_thread([this, speed] {
1404                 if (ui->speed_lock_btn->isChecked()) {
1405                         midi_mapper.set_locked(MIDIMapper::Blinking);
1406                         lock_blink_timeout->start(1000);
1407                         return;
1408                 }
1409
1410                 int percent = lrintf(speed * 100.0f);
1411                 ui->speed_slider->blockSignals(true);
1412                 ui->speed_slider->setValue(percent);
1413                 ui->speed_slider->blockSignals(false);
1414                 ui->speed_lock_btn->setText(QString::fromStdString(" " + to_string(percent) + "%"));
1415
1416                 live_player->set_master_speed(speed);
1417                 midi_mapper.set_speed_light(speed);
1418         });
1419 }
1420
1421 void MainWindow::cue_in()
1422 {
1423         post_to_main_thread([this] { cue_in_clicked(); });
1424 }
1425
1426 void MainWindow::cue_out()
1427 {
1428         post_to_main_thread([this] { cue_out_clicked(); });
1429 }
1430
1431 template<class Model>
1432 void MainWindow::replace_model(QTableView *view, Model **model, Model *new_model)
1433 {
1434         QItemSelectionModel *old_selection_model = view->selectionModel();
1435         view->setModel(new_model);
1436         delete *model;
1437         delete old_selection_model;
1438         *model = new_model;
1439         connect(new_model, &Model::any_content_changed, this, &MainWindow::content_changed);
1440 }
1441
1442 void MainWindow::start_tally()
1443 {
1444         http_reply = http.get(QNetworkRequest(QString::fromStdString(global_flags.tally_url)));
1445         connect(http_reply, &QNetworkReply::finished, this, &MainWindow::tally_received);
1446 }
1447
1448 void MainWindow::tally_received()
1449 {
1450         unsigned time_to_next_tally_ms;
1451         if (http_reply->error()) {
1452                 fprintf(stderr, "HTTP get of '%s' failed: %s\n", global_flags.tally_url.c_str(),
1453                         http_reply->errorString().toStdString().c_str());
1454                 ui->live_frame->setStyleSheet("");
1455                 time_to_next_tally_ms = 1000;
1456         } else {
1457                 string contents = http_reply->readAll().toStdString();
1458                 ui->live_frame->setStyleSheet(QString::fromStdString("background: " + contents));
1459                 time_to_next_tally_ms = 100;
1460         }
1461         http_reply->deleteLater();
1462         http_reply = nullptr;
1463
1464         QTimer::singleShot(time_to_next_tally_ms, this, &MainWindow::start_tally);
1465 }