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 "shared/aboutdialog.h"
   9 #include "shared/disk_space_estimator.h"
  10 #include "shared/post_to_main_thread.h"
  11 #include "shared/timebase.h"
  12 #include "ui_mainwindow.h"
  13
  14 #include <QDesktopServices>
  15 #include <QFileDialog>
  16 #include <QMessageBox>
  17 #include <QMouseEvent>
  18 #include <QNetworkReply>
  19 #include <QShortcut>
  20 #include <QTimer>
  21 #include <QWheelEvent>
  22 #include <future>
  23 #include <sqlite3.h>
  24 #include <string>
  25 #include <vector>
  26
  27 using namespace std;
  28 using namespace std::placeholders;
  29
  30 MainWindow *global_mainwindow = nullptr;
  31 static ClipList *cliplist_clips;
  32 static PlayList *playlist_clips;
  33
  34 extern int64_t current_pts;
  35
  36 MainWindow::MainWindow()
  37         : ui(new Ui::MainWindow),
  38           db(global_flags.working_directory + "/futatabi.db")
  39 {
  40         global_mainwindow = this;
  41         ui->setupUi(this);
  42
  43         // Load settings from database.
  44         SettingsProto settings = db.get_settings();
  45         if (!global_flags.interpolation_quality_set) {
  46                 if (settings.interpolation_quality() != 0) {
  47                         global_flags.interpolation_quality = settings.interpolation_quality() - 1;
  48                 }
  49         }
  50         if (!global_flags.cue_point_padding_set) {
  51                 global_flags.cue_point_padding_seconds = settings.cue_point_padding_seconds();  // Default 0 is fine.
  52         }
  53         if (global_flags.interpolation_quality == 0) {
  54                 // Allocate something just for simplicity; we won't be using it
  55                 // unless the user changes runtime, in which case 1 is fine.
  56                 flow_initialized_interpolation_quality = 1;
  57         } else {
  58                 flow_initialized_interpolation_quality = global_flags.interpolation_quality;
  59         }
  60         save_settings();
  61
  62         // The menus.
  63         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  64         connect(ui->export_cliplist_clip_multitrack_action, &QAction::triggered, this, &MainWindow::export_cliplist_clip_multitrack_triggered);
  65         connect(ui->export_playlist_clip_interpolated_action, &QAction::triggered, this, &MainWindow::export_playlist_clip_interpolated_triggered);
  66         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
  67         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
  68         connect(ui->undo_action, &QAction::triggered, this, &MainWindow::undo_triggered);
  69         connect(ui->redo_action, &QAction::triggered, this, &MainWindow::redo_triggered);
  70         ui->undo_action->setEnabled(false);
  71         ui->redo_action->setEnabled(false);
  72
  73         // The quality group.
  74         QActionGroup *quality_group = new QActionGroup(ui->interpolation_menu);
  75         quality_group->addAction(ui->quality_0_action);
  76         quality_group->addAction(ui->quality_1_action);
  77         quality_group->addAction(ui->quality_2_action);
  78         quality_group->addAction(ui->quality_3_action);
  79         quality_group->addAction(ui->quality_4_action);
  80         if (global_flags.interpolation_quality == 0) {
  81                 ui->quality_0_action->setChecked(true);
  82         } else if (global_flags.interpolation_quality == 1) {
  83                 ui->quality_1_action->setChecked(true);
  84         } else if (global_flags.interpolation_quality == 2) {
  85                 ui->quality_2_action->setChecked(true);
  86         } else if (global_flags.interpolation_quality == 3) {
  87                 ui->quality_3_action->setChecked(true);
  88         } else if (global_flags.interpolation_quality == 4) {
  89                 ui->quality_4_action->setChecked(true);
  90         } else {
  91                 assert(false);
  92         }
  93         connect(ui->quality_0_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 0, _1));
  94         connect(ui->quality_1_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 1, _1));
  95         connect(ui->quality_2_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 2, _1));
  96         connect(ui->quality_3_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 3, _1));
  97         connect(ui->quality_4_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 4, _1));
  98
  99         // The cue point padding group.
 100         QActionGroup *padding_group = new QActionGroup(ui->interpolation_menu);
 101         padding_group->addAction(ui->padding_0_action);
 102         padding_group->addAction(ui->padding_1_action);
 103         padding_group->addAction(ui->padding_2_action);
 104         padding_group->addAction(ui->padding_5_action);
 105         if (global_flags.cue_point_padding_seconds <= 1e-3) {
 106                 ui->padding_0_action->setChecked(true);
 107         } else if (fabs(global_flags.cue_point_padding_seconds - 1.0) < 1e-3) {
 108                 ui->padding_1_action->setChecked(true);
 109         } else if (fabs(global_flags.cue_point_padding_seconds - 2.0) < 1e-3) {
 110                 ui->padding_2_action->setChecked(true);
 111         } else if (fabs(global_flags.cue_point_padding_seconds - 5.0) < 1e-3) {
 112                 ui->padding_5_action->setChecked(true);
 113         } else {
 114                 // Nothing to check, which is fine.
 115         }
 116         connect(ui->padding_0_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 0.0, _1));
 117         connect(ui->padding_1_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 1.0, _1));
 118         connect(ui->padding_2_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 2.0, _1));
 119         connect(ui->padding_5_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 5.0, _1));
 120
 121         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 122         disk_free_label = new QLabel(this);
 123         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 124         ui->menuBar->setCornerWidget(disk_free_label);
 125
 126         StateProto state = db.get_state();
 127         undo_stack.push_back(state);  // The undo stack always has the current state on top.
 128
 129         cliplist_clips = new ClipList(state.clip_list());
 130         ui->clip_list->setModel(cliplist_clips);
 131         connect(cliplist_clips, &ClipList::any_content_changed, this, &MainWindow::content_changed);
 132
 133         playlist_clips = new PlayList(state.play_list());
 134         ui->playlist->setModel(playlist_clips);
 135         connect(playlist_clips, &PlayList::any_content_changed, this, &MainWindow::content_changed);
 136
 137         // For un-highlighting when we lose focus.
 138         ui->clip_list->installEventFilter(this);
 139
 140         // For scrubbing in the pts columns.
 141         ui->clip_list->viewport()->installEventFilter(this);
 142         ui->playlist->viewport()->installEventFilter(this);
 143
 144         QShortcut *cue_in = new QShortcut(QKeySequence(Qt::Key_A), this);
 145         connect(cue_in, &QShortcut::activated, ui->cue_in_btn, &QPushButton::click);
 146         connect(ui->cue_in_btn, &QPushButton::clicked, this, &MainWindow::cue_in_clicked);
 147
 148         QShortcut *cue_out = new QShortcut(QKeySequence(Qt::Key_S), this);
 149         connect(cue_out, &QShortcut::activated, ui->cue_out_btn, &QPushButton::click);
 150         connect(ui->cue_out_btn, &QPushButton::clicked, this, &MainWindow::cue_out_clicked);
 151
 152         QShortcut *queue = new QShortcut(QKeySequence(Qt::Key_Q), this);
 153         connect(queue, &QShortcut::activated, ui->queue_btn, &QPushButton::click);
 154         connect(ui->queue_btn, &QPushButton::clicked, this, &MainWindow::queue_clicked);
 155
 156         QShortcut *preview = new QShortcut(QKeySequence(Qt::Key_W), this);
 157         connect(preview, &QShortcut::activated, ui->preview_btn, &QPushButton::click);
 158         connect(ui->preview_btn, &QPushButton::clicked, this, &MainWindow::preview_clicked);
 159
 160         QShortcut *play = new QShortcut(QKeySequence(Qt::Key_Space), this);
 161         connect(play, &QShortcut::activated, ui->play_btn, &QPushButton::click);
 162         connect(ui->play_btn, &QPushButton::clicked, this, &MainWindow::play_clicked);
 163
 164         connect(ui->stop_btn, &QPushButton::clicked, this, &MainWindow::stop_clicked);
 165         ui->stop_btn->setEnabled(false);
 166
 167         connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 168
 169         connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
 170         QShortcut *delete_key = new QShortcut(QKeySequence(Qt::Key_Delete), ui->playlist);
 171         connect(delete_key, &QShortcut::activated, [this] {
 172                 if (ui->playlist->hasFocus()) {
 173                         playlist_remove();
 174                 }
 175         });
 176
 177         // TODO: support drag-and-drop.
 178         connect(ui->playlist_move_up_btn, &QPushButton::clicked, [this] { playlist_move(-1); });
 179         connect(ui->playlist_move_down_btn, &QPushButton::clicked, [this] { playlist_move(1); });
 180
 181         connect(ui->playlist->selectionModel(), &QItemSelectionModel::selectionChanged,
 182                 this, &MainWindow::playlist_selection_changed);
 183         playlist_selection_changed();  // First time set-up.
 184
 185         preview_player.reset(new Player(ui->preview_display, Player::NO_STREAM_OUTPUT));
 186         live_player.reset(new Player(ui->live_display, Player::HTTPD_STREAM_OUTPUT));
 187         live_player->set_done_callback([this] {
 188                 post_to_main_thread([this] {
 189                         live_player_done();
 190                 });
 191         });
 192         live_player->set_progress_callback([this](const map<uint64_t, double> &progress, double time_remaining) {
 193                 post_to_main_thread([this, progress, time_remaining] {
 194                         live_player_clip_progress(progress, time_remaining);
 195                 });
 196         });
 197         set_output_status("paused");
 198
 199         defer_timeout = new QTimer(this);
 200         defer_timeout->setSingleShot(true);
 201         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 202         ui->undo_action->setEnabled(true);
 203
 204         connect(ui->clip_list->selectionModel(), &QItemSelectionModel::currentChanged,
 205                 this, &MainWindow::clip_list_selection_changed);
 206
 207         // Find out how many cameras we have in the existing frames;
 208         // if none, we start with two cameras.
 209         num_cameras = 2;
 210         {
 211                 lock_guard<mutex> lock(frame_mu);
 212                 for (size_t stream_idx = 2; stream_idx < MAX_STREAMS; ++stream_idx) {
 213                         if (!frames[stream_idx].empty()) {
 214                                 num_cameras = stream_idx + 1;
 215                         }
 216                 }
 217         }
 218         change_num_cameras();
 219
 220         if (!global_flags.tally_url.empty()) {
 221                 start_tally();
 222         }
 223 }
 224
 225 void MainWindow::change_num_cameras()
 226 {
 227         assert(num_cameras >= displays.size());  // We only add, never remove.
 228
 229         // Make new display rows.
 230         unsigned display_rows = (num_cameras + 1) / 2;
 231         ui->video_displays->setStretch(1, display_rows);
 232         for (unsigned i = displays.size(); i < num_cameras; ++i) {
 233                 QFrame *frame = new QFrame(this);
 234                 frame->setAutoFillBackground(true);
 235
 236                 QLayout *layout = new QGridLayout(frame);
 237                 frame->setLayout(layout);
 238                 layout->setContentsMargins(3, 3, 3, 3);
 239
 240                 JPEGFrameView *display = new JPEGFrameView(frame);
 241                 display->setAutoFillBackground(true);
 242                 layout->addWidget(display);
 243
 244                 ui->input_displays->addWidget(frame, i / 2, i % 2);
 245                 display->set_overlay(to_string(i + 1));
 246
 247                 QPushButton *preview_btn = new QPushButton(this);
 248                 preview_btn->setMaximumSize(20, 17);
 249                 preview_btn->setText(QString::fromStdString(to_string(i + 1)));
 250                 ui->preview_layout->addWidget(preview_btn);
 251
 252                 displays.emplace_back(FrameAndDisplay{ frame, display, preview_btn });
 253
 254                 connect(display, &JPEGFrameView::clicked, preview_btn, &QPushButton::click);
 255                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 256                 connect(shortcut, &QShortcut::activated, preview_btn, &QPushButton::click);
 257
 258                 connect(preview_btn, &QPushButton::clicked, [this, i] { preview_angle_clicked(i); });
 259         }
 260
 261         cliplist_clips->change_num_cameras(num_cameras);
 262         playlist_clips->change_num_cameras(num_cameras);
 263
 264         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 265 }
 266
 267 MainWindow::~MainWindow()
 268 {
 269         // Empty so that we can forward-declare Player in the .h file.
 270 }
 271
 272 void MainWindow::cue_in_clicked()
 273 {
 274         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 275                 cliplist_clips->mutable_back()->pts_in = current_pts;
 276                 return;
 277         }
 278         Clip clip;
 279         clip.pts_in = max<int64_t>(current_pts - lrint(global_flags.cue_point_padding_seconds * TIMEBASE), 0);
 280         cliplist_clips->add_clip(clip);
 281         playlist_selection_changed();
 282         ui->clip_list->scrollToBottom();
 283 }
 284
 285 void MainWindow::cue_out_clicked()
 286 {
 287         if (!cliplist_clips->empty()) {
 288                 cliplist_clips->mutable_back()->pts_out = current_pts + lrint(global_flags.cue_point_padding_seconds * TIMEBASE);
 289                 // TODO: select the row in the clip list?
 290         }
 291 }
 292
 293 void MainWindow::queue_clicked()
 294 {
 295         if (cliplist_clips->empty()) {
 296                 return;
 297         }
 298
 299         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 300         if (!selected->hasSelection()) {
 301                 Clip clip = *cliplist_clips->back();
 302                 clip.stream_idx = 0;
 303                 if (clip.pts_out != -1) {
 304                         playlist_clips->add_clip(clip);
 305                         playlist_selection_changed();
 306                         ui->playlist->scrollToBottom();
 307                 }
 308                 return;
 309         }
 310
 311         QModelIndex index = selected->currentIndex();
 312         Clip clip = *cliplist_clips->clip(index.row());
 313         if (cliplist_clips->is_camera_column(index.column())) {
 314                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 315         } else {
 316                 clip.stream_idx = ui->preview_display->get_stream_idx();
 317         }
 318
 319         if (clip.pts_out != -1) {
 320                 playlist_clips->add_clip(clip);
 321                 playlist_selection_changed();
 322                 ui->playlist->scrollToBottom();
 323                 if (!ui->playlist->selectionModel()->hasSelection()) {
 324                         // TODO: Figure out why this doesn't always seem to actually select the row.
 325                         QModelIndex bottom = playlist_clips->index(playlist_clips->size() - 1, 0);
 326                         ui->playlist->setCurrentIndex(bottom);
 327                 }
 328         }
 329 }
 330
 331 void MainWindow::preview_clicked()
 332 {
 333         if (ui->playlist->hasFocus()) {
 334                 // Allow the playlist as preview iff it has focus and something is selected.
 335                 QItemSelectionModel *selected = ui->playlist->selectionModel();
 336                 if (selected->hasSelection()) {
 337                         QModelIndex index = selected->currentIndex();
 338                         const Clip &clip = *playlist_clips->clip(index.row());
 339                         preview_player->play(clip);
 340                         return;
 341                 }
 342         }
 343
 344         if (cliplist_clips->empty())
 345                 return;
 346
 347         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 348         if (!selected->hasSelection()) {
 349                 preview_player->play(*cliplist_clips->back());
 350                 return;
 351         }
 352
 353         QModelIndex index = selected->currentIndex();
 354         Clip clip = *cliplist_clips->clip(index.row());
 355         if (cliplist_clips->is_camera_column(index.column())) {
 356                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 357         } else {
 358                 clip.stream_idx = ui->preview_display->get_stream_idx();
 359         }
 360         preview_player->play(clip);
 361 }
 362
 363 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 364 {
 365         preview_player->override_angle(stream_idx);
 366
 367         // Change the selection if we were previewing a clip from the clip list.
 368         // (The only other thing we could be showing is a pts scrub, and if so,
 369         // that would be selected.)
 370         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 371         if (selected->hasSelection()) {
 372                 QModelIndex cell = selected->selectedIndexes()[0];
 373                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 374                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 375         }
 376 }
 377
 378 void MainWindow::playlist_duplicate()
 379 {
 380         QItemSelectionModel *selected = ui->playlist->selectionModel();
 381         if (!selected->hasSelection()) {
 382                 // Should have been grayed out, but OK.
 383                 return;
 384         }
 385         QModelIndexList rows = selected->selectedRows();
 386         int first = rows.front().row(), last = rows.back().row();
 387         playlist_clips->duplicate_clips(first, last);
 388         playlist_selection_changed();
 389 }
 390
 391 void MainWindow::playlist_remove()
 392 {
 393         QItemSelectionModel *selected = ui->playlist->selectionModel();
 394         if (!selected->hasSelection()) {
 395                 // Should have been grayed out, but OK.
 396                 return;
 397         }
 398         QModelIndexList rows = selected->selectedRows();
 399         int first = rows.front().row(), last = rows.back().row();
 400         playlist_clips->erase_clips(first, last);
 401
 402         // TODO: select the next one in the list?
 403
 404         playlist_selection_changed();
 405 }
 406
 407 void MainWindow::playlist_move(int delta)
 408 {
 409         QItemSelectionModel *selected = ui->playlist->selectionModel();
 410         if (!selected->hasSelection()) {
 411                 // Should have been grayed out, but OK.
 412                 return;
 413         }
 414
 415         QModelIndexList rows = selected->selectedRows();
 416         int first = rows.front().row(), last = rows.back().row();
 417         if ((delta == -1 && first == 0) ||
 418             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 419                 // Should have been grayed out, but OK.
 420                 return;
 421         }
 422
 423         playlist_clips->move_clips(first, last, delta);
 424         playlist_selection_changed();
 425 }
 426
 427 void MainWindow::defer_timer_expired()
 428 {
 429         state_changed(deferred_state);
 430 }
 431
 432 void MainWindow::content_changed()
 433 {
 434         if (defer_timeout->isActive() &&
 435             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 436                 // There's some deferred event waiting, but this event is unrelated.
 437                 // So it's time to short-circuit that timer and do the work it wanted to do.
 438                 defer_timeout->stop();
 439                 state_changed(deferred_state);
 440         }
 441         StateProto state;
 442         *state.mutable_clip_list() = cliplist_clips->serialize();
 443         *state.mutable_play_list() = playlist_clips->serialize();
 444         if (currently_deferring_model_changes) {
 445                 deferred_change_id = current_change_id;
 446                 deferred_state = std::move(state);
 447                 defer_timeout->start(200);
 448                 return;
 449         }
 450         state_changed(state);
 451 }
 452
 453 void MainWindow::state_changed(const StateProto &state)
 454 {
 455         db.store_state(state);
 456
 457         redo_stack.clear();
 458         ui->redo_action->setEnabled(false);
 459
 460         undo_stack.push_back(state);
 461         ui->undo_action->setEnabled(undo_stack.size() > 1);
 462
 463         // Make sure it doesn't grow without bounds.
 464         while (undo_stack.size() >= 100) {
 465                 undo_stack.pop_front();
 466         }
 467 }
 468
 469 void MainWindow::save_settings()
 470 {
 471         SettingsProto settings;
 472         settings.set_interpolation_quality(global_flags.interpolation_quality + 1);
 473         settings.set_cue_point_padding_seconds(global_flags.cue_point_padding_seconds);
 474         db.store_settings(settings);
 475 }
 476
 477 void MainWindow::play_clicked()
 478 {
 479         if (playlist_clips->empty())
 480                 return;
 481
 482         QItemSelectionModel *selected = ui->playlist->selectionModel();
 483         unsigned start_row;
 484         if (!selected->hasSelection()) {
 485                 start_row = 0;
 486         } else {
 487                 start_row = selected->selectedRows(0)[0].row();
 488         }
 489
 490         vector<ClipWithID> clips;
 491         for (unsigned row = start_row; row < playlist_clips->size(); ++row) {
 492                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 493         }
 494         live_player->play(clips);
 495         playlist_clips->set_progress({ { start_row, 0.0f } });
 496         ui->playlist->selectionModel()->clear();
 497         playlist_selection_changed();
 498
 499         ui->stop_btn->setEnabled(true);
 500 }
 501
 502 void MainWindow::stop_clicked()
 503 {
 504         Clip fake_clip;
 505         fake_clip.pts_in = 0;
 506         fake_clip.pts_out = 0;
 507         playlist_clips->set_progress({});
 508         live_player->play(fake_clip);
 509 }
 510
 511 void MainWindow::live_player_done()
 512 {
 513         playlist_selection_changed();
 514         playlist_clips->set_progress({});
 515         ui->stop_btn->setEnabled(false);
 516 }
 517
 518 static string format_duration(double t)
 519 {
 520         int t_ms = lrint(t * 1e3);
 521
 522         int ms = t_ms % 1000;
 523         t_ms /= 1000;
 524         int s = t_ms % 60;
 525         t_ms /= 60;
 526         int m = t_ms;
 527
 528         char buf[256];
 529         snprintf(buf, sizeof(buf), "%d:%02d.%03d", m, s, ms);
 530         return buf;
 531 }
 532
 533 void MainWindow::live_player_clip_progress(const map<uint64_t, double> &progress, double time_remaining)
 534 {
 535         playlist_clips->set_progress(progress);
 536         set_output_status(format_duration(time_remaining) + " left");
 537 }
 538
 539 void MainWindow::resizeEvent(QResizeEvent *event)
 540 {
 541         QMainWindow::resizeEvent(event);
 542
 543         // Ask for a relayout, but only after the event loop is done doing relayout
 544         // on everything else.
 545         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 546 }
 547
 548 void MainWindow::relayout()
 549 {
 550         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 551         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 552 }
 553
 554 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
 555 {
 556         pts = std::max<int64_t>(pts, 0);
 557         if (clip->pts_out == -1) {
 558                 pts = std::min(pts, current_pts);
 559         } else {
 560                 pts = std::min(pts, clip->pts_out);
 561         }
 562         clip->pts_in = pts;
 563 }
 564
 565 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 566 {
 567         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 568         constexpr int camera_degrees_per_pixel = 15;  // One click of most mice.
 569         int scrub_sensitivity = 100;  // pts units per pixel.
 570         int wheel_sensitivity = 100;  // pts units per degree.
 571
 572         unsigned stream_idx = ui->preview_display->get_stream_idx();
 573
 574         if (watched == ui->clip_list) {
 575                 if (event->type() == QEvent::FocusOut) {
 576                         highlight_camera_input(-1);
 577                 }
 578                 return false;
 579         }
 580
 581         if (event->type() != QEvent::Wheel) {
 582                 last_mousewheel_camera_row = -1;
 583         }
 584
 585         if (event->type() == QEvent::MouseButtonPress) {
 586                 QMouseEvent *mouse = (QMouseEvent *)event;
 587
 588                 QTableView *destination;
 589                 ScrubType type;
 590
 591                 if (watched == ui->clip_list->viewport()) {
 592                         destination = ui->clip_list;
 593                         type = SCRUBBING_CLIP_LIST;
 594                 } else if (watched == ui->playlist->viewport()) {
 595                         destination = ui->playlist;
 596                         type = SCRUBBING_PLAYLIST;
 597                 } else {
 598                         return false;
 599                 }
 600                 int column = destination->columnAt(mouse->x());
 601                 int row = destination->rowAt(mouse->y());
 602                 if (column == -1 || row == -1)
 603                         return false;
 604
 605                 if (type == SCRUBBING_CLIP_LIST) {
 606                         if (ClipList::Column(column) == ClipList::Column::IN) {
 607                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 608                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 609                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 610                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 611                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 612                         } else {
 613                                 return false;
 614                         }
 615                 } else {
 616                         if (PlayList::Column(column) == PlayList::Column::IN) {
 617                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 618                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 619                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 620                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 621                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 622                         } else {
 623                                 return false;
 624                         }
 625                 }
 626
 627                 scrubbing = true;
 628                 scrub_row = row;
 629                 scrub_column = column;
 630                 scrub_x_origin = mouse->x();
 631                 scrub_type = type;
 632         } else if (event->type() == QEvent::MouseMove) {
 633                 QMouseEvent *mouse = (QMouseEvent *)event;
 634                 if (mouse->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 635                         scrub_sensitivity *= 10;
 636                         wheel_sensitivity *= 10;
 637                 }
 638                 if (mouse->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 639                         scrub_sensitivity /= 10;
 640                         wheel_sensitivity /= 10;
 641                 }
 642                 if (scrubbing) {
 643                         int offset = mouse->x() - scrub_x_origin;
 644                         int adjusted_offset;
 645                         if (offset >= dead_zone_pixels) {
 646                                 adjusted_offset = offset - dead_zone_pixels;
 647                         } else if (offset < -dead_zone_pixels) {
 648                                 adjusted_offset = offset + dead_zone_pixels;
 649                         } else {
 650                                 adjusted_offset = 0;
 651                         }
 652
 653                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 654                         currently_deferring_model_changes = true;
 655                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 656                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 657                                 if (scrub_column == int(ClipList::Column::IN)) {
 658                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 659                                         set_pts_in(pts, current_pts, clip);
 660                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 661                                 } else {
 662                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 663                                         pts = std::max(pts, clip->pts_in);
 664                                         pts = std::min(pts, current_pts);
 665                                         clip->pts_out = pts;
 666                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 667                                 }
 668                         } else {
 669                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 670                                 if (scrub_column == int(PlayList::Column::IN)) {
 671                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 672                                         set_pts_in(pts, current_pts, clip);
 673                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 674                                 } else {
 675                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 676                                         pts = std::max(pts, clip->pts_in);
 677                                         pts = std::min(pts, current_pts);
 678                                         clip->pts_out = pts;
 679                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 680                                 }
 681                         }
 682                         currently_deferring_model_changes = false;
 683
 684                         return true;  // Don't use this mouse movement for selecting things.
 685                 }
 686         } else if (event->type() == QEvent::Wheel) {
 687                 QWheelEvent *wheel = (QWheelEvent *)event;
 688                 int angle_delta = wheel->angleDelta().y();
 689                 if (wheel->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 690                         scrub_sensitivity *= 10;
 691                         wheel_sensitivity *= 10;
 692                 }
 693                 if (wheel->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 694                         scrub_sensitivity /= 10;
 695                         wheel_sensitivity /= 10;
 696                         angle_delta = wheel->angleDelta().x();  // Qt ickiness.
 697                 }
 698
 699                 QTableView *destination;
 700                 int in_column, out_column, camera_column;
 701                 if (watched == ui->clip_list->viewport()) {
 702                         destination = ui->clip_list;
 703                         in_column = int(ClipList::Column::IN);
 704                         out_column = int(ClipList::Column::OUT);
 705                         camera_column = -1;
 706                         last_mousewheel_camera_row = -1;
 707                 } else if (watched == ui->playlist->viewport()) {
 708                         destination = ui->playlist;
 709                         in_column = int(PlayList::Column::IN);
 710                         out_column = int(PlayList::Column::OUT);
 711                         camera_column = int(PlayList::Column::CAMERA);
 712                 } else {
 713                         last_mousewheel_camera_row = -1;
 714                         return false;
 715                 }
 716                 int column = destination->columnAt(wheel->x());
 717                 int row = destination->rowAt(wheel->y());
 718                 if (column == -1 || row == -1)
 719                         return false;
 720
 721                 // Only adjust pts with the wheel if the given row is selected.
 722                 if (!destination->hasFocus() ||
 723                     row != destination->selectionModel()->currentIndex().row()) {
 724                         return false;
 725                 }
 726
 727                 currently_deferring_model_changes = true;
 728                 {
 729                         current_change_id = (watched == ui->clip_list->viewport()) ? "cliplist:" : "playlist:";
 730                         ClipProxy clip = (watched == ui->clip_list->viewport()) ? cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 731                         if (watched == ui->playlist->viewport()) {
 732                                 stream_idx = clip->stream_idx;
 733                         }
 734
 735                         if (column != camera_column) {
 736                                 last_mousewheel_camera_row = -1;
 737                         }
 738                         if (column == in_column) {
 739                                 current_change_id += "in:" + to_string(row);
 740                                 int64_t pts = clip->pts_in + angle_delta * wheel_sensitivity;
 741                                 set_pts_in(pts, current_pts, clip);
 742                                 preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 743                         } else if (column == out_column) {
 744                                 current_change_id += "out:" + to_string(row);
 745                                 int64_t pts = clip->pts_out + angle_delta * wheel_sensitivity;
 746                                 pts = std::max(pts, clip->pts_in);
 747                                 pts = std::min(pts, current_pts);
 748                                 clip->pts_out = pts;
 749                                 preview_single_frame(pts, stream_idx, LAST_BEFORE);
 750                         } else if (column == camera_column) {
 751                                 current_change_id += "camera:" + to_string(row);
 752                                 int angle_degrees = angle_delta;
 753                                 if (last_mousewheel_camera_row == row) {
 754                                         angle_degrees += leftover_angle_degrees;
 755                                 }
 756
 757                                 int stream_idx = clip->stream_idx + angle_degrees / camera_degrees_per_pixel;
 758                                 stream_idx = std::max(stream_idx, 0);
 759                                 stream_idx = std::min<int>(stream_idx, num_cameras - 1);
 760                                 clip->stream_idx = stream_idx;
 761
 762                                 last_mousewheel_camera_row = row;
 763                                 leftover_angle_degrees = angle_degrees % camera_degrees_per_pixel;
 764
 765                                 // Don't update the live view, that's rarely what the operator wants.
 766                         }
 767                 }
 768                 currently_deferring_model_changes = false;
 769                 return true;  // Don't scroll.
 770         } else if (event->type() == QEvent::MouseButtonRelease) {
 771                 scrubbing = false;
 772         }
 773         return false;
 774 }
 775
 776 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 777 {
 778         if (rounding == LAST_BEFORE) {
 779                 lock_guard<mutex> lock(frame_mu);
 780                 if (frames[stream_idx].empty())
 781                         return;
 782                 auto it = find_last_frame_before(frames[stream_idx], pts);
 783                 if (it != frames[stream_idx].end()) {
 784                         pts = it->pts;
 785                 }
 786         } else {
 787                 assert(rounding == FIRST_AT_OR_AFTER);
 788                 lock_guard<mutex> lock(frame_mu);
 789                 if (frames[stream_idx].empty())
 790                         return;
 791                 auto it = find_first_frame_at_or_after(frames[stream_idx], pts);
 792                 if (it != frames[stream_idx].end()) {
 793                         pts = it->pts;
 794                 }
 795         }
 796
 797         Clip fake_clip;
 798         fake_clip.pts_in = pts;
 799         fake_clip.pts_out = pts + 1;
 800         preview_player->play(fake_clip);
 801 }
 802
 803 void MainWindow::playlist_selection_changed()
 804 {
 805         QItemSelectionModel *selected = ui->playlist->selectionModel();
 806         bool any_selected = selected->hasSelection();
 807         ui->playlist_duplicate_btn->setEnabled(any_selected);
 808         ui->playlist_remove_btn->setEnabled(any_selected);
 809         ui->playlist_move_up_btn->setEnabled(
 810                 any_selected && selected->selectedRows().front().row() > 0);
 811         ui->playlist_move_down_btn->setEnabled(
 812                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 813         ui->play_btn->setEnabled(!playlist_clips->empty());
 814
 815         if (!any_selected) {
 816                 set_output_status("paused");
 817         } else {
 818                 vector<ClipWithID> clips;
 819                 for (size_t row = selected->selectedRows().front().row(); row < playlist_clips->size(); ++row) {
 820                         clips.emplace_back(*playlist_clips->clip_with_id(row));
 821                 }
 822                 double remaining = compute_total_time(clips);
 823                 set_output_status(format_duration(remaining) + " ready");
 824         }
 825 }
 826
 827 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &)
 828 {
 829         int camera_selected = -1;
 830         if (cliplist_clips->is_camera_column(current.column())) {
 831                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 832         }
 833         highlight_camera_input(camera_selected);
 834 }
 835
 836 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 837 {
 838         char time_str[256];
 839         if (estimated_seconds_left < 60.0) {
 840                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 841         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 842                 int s = lrintf(estimated_seconds_left);
 843                 int m = s / 60;
 844                 s %= 60;
 845                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 846         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 847                 int m = lrintf(estimated_seconds_left / 60.0);
 848                 snprintf(time_str, sizeof(time_str), "%dm", m);
 849         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 850                 int m = lrintf(estimated_seconds_left / 60.0);
 851                 int h = m / 60;
 852                 m %= 60;
 853                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 854         } else {  // More than ten hours: Xh.
 855                 int h = lrintf(estimated_seconds_left / 3600.0);
 856                 snprintf(time_str, sizeof(time_str), "%dh", h);
 857         }
 858         char buf[256];
 859         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 860
 861         std::string label = buf;
 862
 863         post_to_main_thread([this, label] {
 864                 disk_free_label->setText(QString::fromStdString(label));
 865                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 866         });
 867 }
 868
 869 void MainWindow::exit_triggered()
 870 {
 871         close();
 872 }
 873
 874 void MainWindow::export_cliplist_clip_multitrack_triggered()
 875 {
 876         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 877         if (!selected->hasSelection()) {
 878                 QMessageBox msgbox;
 879                 msgbox.setText("No clip selected in the clip list. Select one and try exporting again.");
 880                 msgbox.exec();
 881                 return;
 882         }
 883
 884         QModelIndex index = selected->currentIndex();
 885         Clip clip = *cliplist_clips->clip(index.row());
 886         QString filename = QFileDialog::getSaveFileName(this,
 887                 "Export multitrack clip", QString(), tr("Matroska video files (*.mkv)"));
 888         if (filename.isNull()) {
 889                 // Cancel.
 890                 return;
 891         }
 892         if (!filename.endsWith(".mkv")) {
 893                 filename += ".mkv";
 894         }
 895         export_multitrack_clip(filename.toStdString(), clip);
 896 }
 897
 898 void MainWindow::export_playlist_clip_interpolated_triggered()
 899 {
 900         QItemSelectionModel *selected = ui->playlist->selectionModel();
 901         if (!selected->hasSelection()) {
 902                 QMessageBox msgbox;
 903                 msgbox.setText("No clip selected in the playlist. Select one and try exporting again.");
 904                 msgbox.exec();
 905                 return;
 906         }
 907
 908         QString filename = QFileDialog::getSaveFileName(this,
 909                 "Export interpolated clip", QString(), tr("Matroska video files (*.mkv)"));
 910         if (filename.isNull()) {
 911                 // Cancel.
 912                 return;
 913         }
 914         if (!filename.endsWith(".mkv")) {
 915                 filename += ".mkv";
 916         }
 917
 918         vector<Clip> clips;
 919         QModelIndexList rows = selected->selectedRows();
 920         for (QModelIndex index : rows) {
 921                 clips.push_back(*playlist_clips->clip(index.row()));
 922         }
 923         export_interpolated_clip(filename.toStdString(), clips);
 924 }
 925
 926 void MainWindow::manual_triggered()
 927 {
 928         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 929                 QMessageBox msgbox;
 930                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 931                 msgbox.exec();
 932         }
 933 }
 934
 935 void MainWindow::about_triggered()
 936 {
 937         AboutDialog("Futatabi", "Multicamera slow motion video server").exec();
 938 }
 939
 940 void MainWindow::undo_triggered()
 941 {
 942         // Finish any deferred action.
 943         if (defer_timeout->isActive()) {
 944                 defer_timeout->stop();
 945                 state_changed(deferred_state);
 946         }
 947
 948         StateProto redo_state;
 949         *redo_state.mutable_clip_list() = cliplist_clips->serialize();
 950         *redo_state.mutable_play_list() = playlist_clips->serialize();
 951         redo_stack.push_back(std::move(redo_state));
 952         ui->redo_action->setEnabled(true);
 953
 954         assert(undo_stack.size() > 1);
 955
 956         // Pop off the current state, which is always at the top of the stack.
 957         undo_stack.pop_back();
 958
 959         StateProto state = undo_stack.back();
 960         ui->undo_action->setEnabled(undo_stack.size() > 1);
 961
 962         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
 963         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
 964
 965         db.store_state(state);
 966 }
 967
 968 void MainWindow::redo_triggered()
 969 {
 970         assert(!redo_stack.empty());
 971
 972         ui->undo_action->setEnabled(true);
 973         ui->redo_action->setEnabled(true);
 974
 975         undo_stack.push_back(std::move(redo_stack.back()));
 976         redo_stack.pop_back();
 977         ui->undo_action->setEnabled(true);
 978         ui->redo_action->setEnabled(!redo_stack.empty());
 979
 980         const StateProto &state = undo_stack.back();
 981         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
 982         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
 983
 984         db.store_state(state);
 985 }
 986
 987 void MainWindow::quality_toggled(int quality, bool checked)
 988 {
 989         if (!checked) {
 990                 return;
 991         }
 992         global_flags.interpolation_quality = quality;
 993         if (quality != 0 &&  // Turning interpolation off is always possible.
 994             quality != flow_initialized_interpolation_quality) {
 995                 QMessageBox msgbox;
 996                 msgbox.setText(QString::fromStdString(
 997                         "The interpolation quality for the main output cannot be changed at runtime, "
 998                         "except being turned completely off; it will take effect for exported files "
 999                         "only until next restart. The live output quality thus remains at " +
1000                         to_string(flow_initialized_interpolation_quality) + "."));
1001                 msgbox.exec();
1002         }
1003
1004         save_settings();
1005 }
1006
1007 void MainWindow::padding_toggled(double seconds, bool checked)
1008 {
1009         if (!checked) {
1010                 return;
1011         }
1012         global_flags.cue_point_padding_seconds = seconds;
1013         save_settings();
1014 }
1015
1016 void MainWindow::highlight_camera_input(int stream_idx)
1017 {
1018         for (unsigned i = 0; i < num_cameras; ++i) {
1019                 if (unsigned(stream_idx) == i) {
1020                         displays[i].frame->setStyleSheet("background: rgb(0,255,0)");
1021                 } else {
1022                         displays[i].frame->setStyleSheet("");
1023                 }
1024         }
1025 }
1026
1027 void MainWindow::set_output_status(const string &status)
1028 {
1029         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
1030
1031         lock_guard<mutex> lock(queue_status_mu);
1032         queue_status = status;
1033 }
1034
1035 pair<string, string> MainWindow::get_queue_status() const
1036 {
1037         lock_guard<mutex> lock(queue_status_mu);
1038         return { queue_status, "text/plain" };
1039 }
1040
1041 void MainWindow::display_frame(unsigned stream_idx, const FrameOnDisk &frame)
1042 {
1043         if (stream_idx >= MAX_STREAMS) {
1044                 fprintf(stderr, "WARNING: Ignoring too-high stream index %u.\n", stream_idx);
1045                 return;
1046         }
1047         if (stream_idx >= num_cameras) {
1048                 post_to_main_thread_and_wait([this, stream_idx] {
1049                         num_cameras = stream_idx + 1;
1050                         change_num_cameras();
1051                 });
1052         }
1053         displays[stream_idx].display->setFrame(stream_idx, frame);
1054 }
1055
1056 template<class Model>
1057 void MainWindow::replace_model(QTableView *view, Model **model, Model *new_model)
1058 {
1059         QItemSelectionModel *old_selection_model = view->selectionModel();
1060         view->setModel(new_model);
1061         delete *model;
1062         delete old_selection_model;
1063         *model = new_model;
1064         connect(new_model, &Model::any_content_changed, this, &MainWindow::content_changed);
1065 }
1066
1067 void MainWindow::start_tally()
1068 {
1069         http_reply = http.get(QNetworkRequest(QString::fromStdString(global_flags.tally_url)));
1070         connect(http_reply, &QNetworkReply::finished, this, &MainWindow::tally_received);
1071 }
1072
1073 void MainWindow::tally_received()
1074 {
1075         unsigned time_to_next_tally_ms;
1076         if (http_reply->error()) {
1077                 fprintf(stderr, "HTTP get of '%s' failed: %s\n", global_flags.tally_url.c_str(),
1078                         http_reply->errorString().toStdString().c_str());
1079                 ui->live_frame->setStyleSheet("");
1080                 time_to_next_tally_ms = 1000;
1081         } else {
1082                 string contents = http_reply->readAll().toStdString();
1083                 ui->live_frame->setStyleSheet(QString::fromStdString("background: " + contents));
1084                 time_to_next_tally_ms = 100;
1085         }
1086         http_reply->deleteLater();
1087         http_reply = nullptr;
1088
1089         QTimer::singleShot(time_to_next_tally_ms, this, &MainWindow::start_tally);
1090 }