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         } else {
 277                 Clip clip;
 278                 clip.pts_in = max<int64_t>(current_pts - lrint(global_flags.cue_point_padding_seconds * TIMEBASE), 0);
 279                 cliplist_clips->add_clip(clip);
 280                 playlist_selection_changed();
 281         }
 282
 283         // Select the item so that we can jog it.
 284         ui->clip_list->setFocus();
 285         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::IN));
 286         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 287         ui->clip_list->scrollToBottom();
 288 }
 289
 290 void MainWindow::cue_out_clicked()
 291 {
 292         if (cliplist_clips->empty()) {
 293                 return;
 294         }
 295
 296         cliplist_clips->mutable_back()->pts_out = current_pts + lrint(global_flags.cue_point_padding_seconds * TIMEBASE);
 297
 298         // Select the item so that we can jog it.
 299         ui->clip_list->setFocus();
 300         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::OUT));
 301         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 302         ui->clip_list->scrollToBottom();
 303 }
 304
 305 void MainWindow::queue_clicked()
 306 {
 307         if (cliplist_clips->empty()) {
 308                 return;
 309         }
 310
 311         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 312         if (!selected->hasSelection()) {
 313                 Clip clip = *cliplist_clips->back();
 314                 clip.stream_idx = 0;
 315                 if (clip.pts_out != -1) {
 316                         playlist_clips->add_clip(clip);
 317                         playlist_selection_changed();
 318                         ui->playlist->scrollToBottom();
 319                 }
 320                 return;
 321         }
 322
 323         QModelIndex index = selected->currentIndex();
 324         Clip clip = *cliplist_clips->clip(index.row());
 325         if (cliplist_clips->is_camera_column(index.column())) {
 326                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 327         } else {
 328                 clip.stream_idx = ui->preview_display->get_stream_idx();
 329         }
 330
 331         if (clip.pts_out != -1) {
 332                 playlist_clips->add_clip(clip);
 333                 playlist_selection_changed();
 334                 ui->playlist->scrollToBottom();
 335                 if (!ui->playlist->selectionModel()->hasSelection()) {
 336                         // TODO: Figure out why this doesn't always seem to actually select the row.
 337                         QModelIndex bottom = playlist_clips->index(playlist_clips->size() - 1, 0);
 338                         ui->playlist->setCurrentIndex(bottom);
 339                 }
 340         }
 341 }
 342
 343 void MainWindow::preview_clicked()
 344 {
 345         // See also enable_or_disable_preview_button().
 346
 347         if (ui->playlist->hasFocus()) {
 348                 // Allow the playlist as preview iff it has focus and something is selected.
 349                 QItemSelectionModel *selected = ui->playlist->selectionModel();
 350                 if (selected->hasSelection()) {
 351                         QModelIndex index = selected->currentIndex();
 352                         const Clip &clip = *playlist_clips->clip(index.row());
 353                         preview_player->play(clip);
 354                         return;
 355                 }
 356         }
 357
 358         if (cliplist_clips->empty())
 359                 return;
 360
 361         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 362         if (!selected->hasSelection()) {
 363                 preview_player->play(*cliplist_clips->back());
 364                 return;
 365         }
 366
 367         QModelIndex index = selected->currentIndex();
 368         Clip clip = *cliplist_clips->clip(index.row());
 369         if (cliplist_clips->is_camera_column(index.column())) {
 370                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 371         } else {
 372                 clip.stream_idx = ui->preview_display->get_stream_idx();
 373         }
 374         preview_player->play(clip);
 375 }
 376
 377 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 378 {
 379         preview_player->override_angle(stream_idx);
 380
 381         // Change the selection if we were previewing a clip from the clip list.
 382         // (The only other thing we could be showing is a pts scrub, and if so,
 383         // that would be selected.)
 384         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 385         if (selected->hasSelection()) {
 386                 QModelIndex cell = selected->selectedIndexes()[0];
 387                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 388                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 389         }
 390 }
 391
 392 void MainWindow::playlist_duplicate()
 393 {
 394         QItemSelectionModel *selected = ui->playlist->selectionModel();
 395         if (!selected->hasSelection()) {
 396                 // Should have been grayed out, but OK.
 397                 return;
 398         }
 399         QModelIndexList rows = selected->selectedRows();
 400         int first = rows.front().row(), last = rows.back().row();
 401         playlist_clips->duplicate_clips(first, last);
 402         playlist_selection_changed();
 403 }
 404
 405 void MainWindow::playlist_remove()
 406 {
 407         QItemSelectionModel *selected = ui->playlist->selectionModel();
 408         if (!selected->hasSelection()) {
 409                 // Should have been grayed out, but OK.
 410                 return;
 411         }
 412         QModelIndexList rows = selected->selectedRows();
 413         int first = rows.front().row(), last = rows.back().row();
 414         playlist_clips->erase_clips(first, last);
 415
 416         // TODO: select the next one in the list?
 417
 418         playlist_selection_changed();
 419 }
 420
 421 void MainWindow::playlist_move(int delta)
 422 {
 423         QItemSelectionModel *selected = ui->playlist->selectionModel();
 424         if (!selected->hasSelection()) {
 425                 // Should have been grayed out, but OK.
 426                 return;
 427         }
 428
 429         QModelIndexList rows = selected->selectedRows();
 430         int first = rows.front().row(), last = rows.back().row();
 431         if ((delta == -1 && first == 0) ||
 432             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 433                 // Should have been grayed out, but OK.
 434                 return;
 435         }
 436
 437         playlist_clips->move_clips(first, last, delta);
 438         playlist_selection_changed();
 439 }
 440
 441 void MainWindow::defer_timer_expired()
 442 {
 443         state_changed(deferred_state);
 444 }
 445
 446 void MainWindow::content_changed()
 447 {
 448         // If we are playing, update the part of the playlist that's not playing yet.
 449         vector<ClipWithID> clips;
 450         for (unsigned row = 0; row < playlist_clips->size(); ++row) {
 451                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 452         }
 453         live_player->splice_play(clips);
 454
 455         // Serialize the state.
 456         if (defer_timeout->isActive() &&
 457             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 458                 // There's some deferred event waiting, but this event is unrelated.
 459                 // So it's time to short-circuit that timer and do the work it wanted to do.
 460                 defer_timeout->stop();
 461                 state_changed(deferred_state);
 462         }
 463         StateProto state;
 464         *state.mutable_clip_list() = cliplist_clips->serialize();
 465         *state.mutable_play_list() = playlist_clips->serialize();
 466         if (currently_deferring_model_changes) {
 467                 deferred_change_id = current_change_id;
 468                 deferred_state = std::move(state);
 469                 defer_timeout->start(200);
 470                 return;
 471         }
 472         state_changed(state);
 473 }
 474
 475 void MainWindow::state_changed(const StateProto &state)
 476 {
 477         db.store_state(state);
 478
 479         redo_stack.clear();
 480         ui->redo_action->setEnabled(false);
 481
 482         undo_stack.push_back(state);
 483         ui->undo_action->setEnabled(undo_stack.size() > 1);
 484
 485         // Make sure it doesn't grow without bounds.
 486         while (undo_stack.size() >= 100) {
 487                 undo_stack.pop_front();
 488         }
 489 }
 490
 491 void MainWindow::save_settings()
 492 {
 493         SettingsProto settings;
 494         settings.set_interpolation_quality(global_flags.interpolation_quality + 1);
 495         settings.set_cue_point_padding_seconds(global_flags.cue_point_padding_seconds);
 496         db.store_settings(settings);
 497 }
 498
 499 void MainWindow::play_clicked()
 500 {
 501         if (playlist_clips->empty())
 502                 return;
 503
 504         QItemSelectionModel *selected = ui->playlist->selectionModel();
 505         unsigned start_row;
 506         if (!selected->hasSelection()) {
 507                 start_row = 0;
 508         } else {
 509                 start_row = selected->selectedRows(0)[0].row();
 510         }
 511
 512         vector<ClipWithID> clips;
 513         for (unsigned row = start_row; row < playlist_clips->size(); ++row) {
 514                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 515         }
 516         live_player->play(clips);
 517         playlist_clips->set_progress({ { start_row, 0.0f } });
 518         ui->playlist->selectionModel()->clear();
 519         playlist_selection_changed();
 520
 521         ui->stop_btn->setEnabled(true);
 522 }
 523
 524 void MainWindow::stop_clicked()
 525 {
 526         Clip fake_clip;
 527         fake_clip.pts_in = 0;
 528         fake_clip.pts_out = 0;
 529         playlist_clips->set_progress({});
 530         live_player->play(fake_clip);
 531         ui->stop_btn->setEnabled(false);
 532 }
 533
 534 void MainWindow::live_player_done()
 535 {
 536         playlist_selection_changed();
 537         playlist_clips->set_progress({});
 538         ui->stop_btn->setEnabled(false);
 539 }
 540
 541 void MainWindow::live_player_clip_progress(const map<uint64_t, double> &progress, double time_remaining)
 542 {
 543         playlist_clips->set_progress(progress);
 544         set_output_status(format_duration(time_remaining) + " left");
 545 }
 546
 547 void MainWindow::resizeEvent(QResizeEvent *event)
 548 {
 549         QMainWindow::resizeEvent(event);
 550
 551         // Ask for a relayout, but only after the event loop is done doing relayout
 552         // on everything else.
 553         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 554 }
 555
 556 void MainWindow::relayout()
 557 {
 558         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 559         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 560 }
 561
 562 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
 563 {
 564         pts = std::max<int64_t>(pts, 0);
 565         if (clip->pts_out == -1) {
 566                 pts = std::min(pts, current_pts);
 567         } else {
 568                 pts = std::min(pts, clip->pts_out);
 569         }
 570         clip->pts_in = pts;
 571 }
 572
 573 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 574 {
 575         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 576         constexpr int camera_degrees_per_pixel = 15;  // One click of most mice.
 577         int scrub_sensitivity = 100;  // pts units per pixel.
 578         int wheel_sensitivity = 100;  // pts units per degree.
 579
 580         if (event->type() == QEvent::FocusIn || event->type() == QEvent::FocusOut) {
 581                 enable_or_disable_preview_button();
 582         }
 583
 584         unsigned stream_idx = ui->preview_display->get_stream_idx();
 585
 586         if (watched == ui->clip_list) {
 587                 if (event->type() == QEvent::FocusOut) {
 588                         highlight_camera_input(-1);
 589                 }
 590                 return false;
 591         }
 592
 593         if (event->type() != QEvent::Wheel) {
 594                 last_mousewheel_camera_row = -1;
 595         }
 596
 597         if (event->type() == QEvent::MouseButtonPress) {
 598                 QMouseEvent *mouse = (QMouseEvent *)event;
 599
 600                 QTableView *destination;
 601                 ScrubType type;
 602
 603                 if (watched == ui->clip_list->viewport()) {
 604                         destination = ui->clip_list;
 605                         type = SCRUBBING_CLIP_LIST;
 606                 } else if (watched == ui->playlist->viewport()) {
 607                         destination = ui->playlist;
 608                         type = SCRUBBING_PLAYLIST;
 609                 } else {
 610                         return false;
 611                 }
 612                 int column = destination->columnAt(mouse->x());
 613                 int row = destination->rowAt(mouse->y());
 614                 if (column == -1 || row == -1)
 615                         return false;
 616
 617                 if (type == SCRUBBING_CLIP_LIST) {
 618                         if (ClipList::Column(column) == ClipList::Column::IN) {
 619                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 620                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 621                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 622                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 623                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 624                         } else {
 625                                 return false;
 626                         }
 627                 } else {
 628                         if (PlayList::Column(column) == PlayList::Column::IN) {
 629                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 630                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 631                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 632                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 633                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 634                         } else {
 635                                 return false;
 636                         }
 637                 }
 638
 639                 scrubbing = true;
 640                 scrub_row = row;
 641                 scrub_column = column;
 642                 scrub_x_origin = mouse->x();
 643                 scrub_type = type;
 644         } else if (event->type() == QEvent::MouseMove) {
 645                 QMouseEvent *mouse = (QMouseEvent *)event;
 646                 if (mouse->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 647                         scrub_sensitivity *= 10;
 648                         wheel_sensitivity *= 10;
 649                 }
 650                 if (mouse->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 651                         scrub_sensitivity /= 10;
 652                         wheel_sensitivity /= 10;
 653                 }
 654                 if (scrubbing) {
 655                         int offset = mouse->x() - scrub_x_origin;
 656                         int adjusted_offset;
 657                         if (offset >= dead_zone_pixels) {
 658                                 adjusted_offset = offset - dead_zone_pixels;
 659                         } else if (offset < -dead_zone_pixels) {
 660                                 adjusted_offset = offset + dead_zone_pixels;
 661                         } else {
 662                                 adjusted_offset = 0;
 663                         }
 664
 665                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 666                         currently_deferring_model_changes = true;
 667                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 668                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 669                                 if (scrub_column == int(ClipList::Column::IN)) {
 670                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 671                                         set_pts_in(pts, current_pts, clip);
 672                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 673                                 } else {
 674                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 675                                         pts = std::max(pts, clip->pts_in);
 676                                         pts = std::min(pts, current_pts);
 677                                         clip->pts_out = pts;
 678                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 679                                 }
 680                         } else {
 681                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 682                                 if (scrub_column == int(PlayList::Column::IN)) {
 683                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 684                                         set_pts_in(pts, current_pts, clip);
 685                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 686                                 } else {
 687                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 688                                         pts = std::max(pts, clip->pts_in);
 689                                         pts = std::min(pts, current_pts);
 690                                         clip->pts_out = pts;
 691                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 692                                 }
 693                         }
 694                         currently_deferring_model_changes = false;
 695
 696                         return true;  // Don't use this mouse movement for selecting things.
 697                 }
 698         } else if (event->type() == QEvent::Wheel) {
 699                 QWheelEvent *wheel = (QWheelEvent *)event;
 700                 int angle_delta = wheel->angleDelta().y();
 701                 if (wheel->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 702                         scrub_sensitivity *= 10;
 703                         wheel_sensitivity *= 10;
 704                 }
 705                 if (wheel->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 706                         scrub_sensitivity /= 10;
 707                         wheel_sensitivity /= 10;
 708                         angle_delta = wheel->angleDelta().x();  // Qt ickiness.
 709                 }
 710
 711                 QTableView *destination;
 712                 int in_column, out_column, camera_column;
 713                 if (watched == ui->clip_list->viewport()) {
 714                         destination = ui->clip_list;
 715                         in_column = int(ClipList::Column::IN);
 716                         out_column = int(ClipList::Column::OUT);
 717                         camera_column = -1;
 718                         last_mousewheel_camera_row = -1;
 719                 } else if (watched == ui->playlist->viewport()) {
 720                         destination = ui->playlist;
 721                         in_column = int(PlayList::Column::IN);
 722                         out_column = int(PlayList::Column::OUT);
 723                         camera_column = int(PlayList::Column::CAMERA);
 724                 } else {
 725                         last_mousewheel_camera_row = -1;
 726                         return false;
 727                 }
 728                 int column = destination->columnAt(wheel->x());
 729                 int row = destination->rowAt(wheel->y());
 730                 if (column == -1 || row == -1)
 731                         return false;
 732
 733                 // Only adjust pts with the wheel if the given row is selected.
 734                 if (!destination->hasFocus() ||
 735                     row != destination->selectionModel()->currentIndex().row()) {
 736                         return false;
 737                 }
 738
 739                 currently_deferring_model_changes = true;
 740                 {
 741                         current_change_id = (watched == ui->clip_list->viewport()) ? "cliplist:" : "playlist:";
 742                         ClipProxy clip = (watched == ui->clip_list->viewport()) ? cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 743                         if (watched == ui->playlist->viewport()) {
 744                                 stream_idx = clip->stream_idx;
 745                         }
 746
 747                         if (column != camera_column) {
 748                                 last_mousewheel_camera_row = -1;
 749                         }
 750                         if (column == in_column) {
 751                                 current_change_id += "in:" + to_string(row);
 752                                 int64_t pts = clip->pts_in + angle_delta * wheel_sensitivity;
 753                                 set_pts_in(pts, current_pts, clip);
 754                                 preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 755                         } else if (column == out_column) {
 756                                 current_change_id += "out:" + to_string(row);
 757                                 int64_t pts = clip->pts_out + angle_delta * wheel_sensitivity;
 758                                 pts = std::max(pts, clip->pts_in);
 759                                 pts = std::min(pts, current_pts);
 760                                 clip->pts_out = pts;
 761                                 preview_single_frame(pts, stream_idx, LAST_BEFORE);
 762                         } else if (column == camera_column) {
 763                                 current_change_id += "camera:" + to_string(row);
 764                                 int angle_degrees = angle_delta;
 765                                 if (last_mousewheel_camera_row == row) {
 766                                         angle_degrees += leftover_angle_degrees;
 767                                 }
 768
 769                                 int stream_idx = clip->stream_idx + angle_degrees / camera_degrees_per_pixel;
 770                                 stream_idx = std::max(stream_idx, 0);
 771                                 stream_idx = std::min<int>(stream_idx, num_cameras - 1);
 772                                 clip->stream_idx = stream_idx;
 773
 774                                 last_mousewheel_camera_row = row;
 775                                 leftover_angle_degrees = angle_degrees % camera_degrees_per_pixel;
 776
 777                                 // Don't update the live view, that's rarely what the operator wants.
 778                         }
 779                 }
 780                 currently_deferring_model_changes = false;
 781                 return true;  // Don't scroll.
 782         } else if (event->type() == QEvent::MouseButtonRelease) {
 783                 scrubbing = false;
 784         }
 785         return false;
 786 }
 787
 788 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 789 {
 790         if (rounding == LAST_BEFORE) {
 791                 lock_guard<mutex> lock(frame_mu);
 792                 if (frames[stream_idx].empty())
 793                         return;
 794                 auto it = find_last_frame_before(frames[stream_idx], pts);
 795                 if (it != frames[stream_idx].end()) {
 796                         pts = it->pts;
 797                 }
 798         } else {
 799                 assert(rounding == FIRST_AT_OR_AFTER);
 800                 lock_guard<mutex> lock(frame_mu);
 801                 if (frames[stream_idx].empty())
 802                         return;
 803                 auto it = find_first_frame_at_or_after(frames[stream_idx], pts);
 804                 if (it != frames[stream_idx].end()) {
 805                         pts = it->pts;
 806                 }
 807         }
 808
 809         Clip fake_clip;
 810         fake_clip.pts_in = pts;
 811         fake_clip.pts_out = pts + 1;
 812         fake_clip.stream_idx = stream_idx;
 813         preview_player->play(fake_clip);
 814 }
 815
 816 void MainWindow::playlist_selection_changed()
 817 {
 818         enable_or_disable_preview_button();
 819
 820         QItemSelectionModel *selected = ui->playlist->selectionModel();
 821         bool any_selected = selected->hasSelection();
 822         ui->playlist_duplicate_btn->setEnabled(any_selected);
 823         ui->playlist_remove_btn->setEnabled(any_selected);
 824         ui->playlist_move_up_btn->setEnabled(
 825                 any_selected && selected->selectedRows().front().row() > 0);
 826         ui->playlist_move_down_btn->setEnabled(
 827                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 828         ui->play_btn->setEnabled(!playlist_clips->empty());
 829
 830         if (!any_selected) {
 831                 set_output_status("paused");
 832         } else {
 833                 vector<ClipWithID> clips;
 834                 for (size_t row = selected->selectedRows().front().row(); row < playlist_clips->size(); ++row) {
 835                         clips.emplace_back(*playlist_clips->clip_with_id(row));
 836                 }
 837                 double remaining = compute_total_time(clips);
 838                 set_output_status(format_duration(remaining) + " ready");
 839         }
 840 }
 841
 842 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &)
 843 {
 844         int camera_selected = -1;
 845         if (cliplist_clips->is_camera_column(current.column())) {
 846                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 847         }
 848         highlight_camera_input(camera_selected);
 849 }
 850
 851 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 852 {
 853         char time_str[256];
 854         if (estimated_seconds_left < 60.0) {
 855                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 856         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 857                 int s = lrintf(estimated_seconds_left);
 858                 int m = s / 60;
 859                 s %= 60;
 860                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 861         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 862                 int m = lrintf(estimated_seconds_left / 60.0);
 863                 snprintf(time_str, sizeof(time_str), "%dm", m);
 864         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 865                 int m = lrintf(estimated_seconds_left / 60.0);
 866                 int h = m / 60;
 867                 m %= 60;
 868                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 869         } else {  // More than ten hours: Xh.
 870                 int h = lrintf(estimated_seconds_left / 3600.0);
 871                 snprintf(time_str, sizeof(time_str), "%dh", h);
 872         }
 873         char buf[256];
 874         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 875
 876         std::string label = buf;
 877
 878         post_to_main_thread([this, label] {
 879                 disk_free_label->setText(QString::fromStdString(label));
 880                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 881         });
 882 }
 883
 884 void MainWindow::exit_triggered()
 885 {
 886         close();
 887 }
 888
 889 void MainWindow::export_cliplist_clip_multitrack_triggered()
 890 {
 891         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 892         if (!selected->hasSelection()) {
 893                 QMessageBox msgbox;
 894                 msgbox.setText("No clip selected in the clip list. Select one and try exporting again.");
 895                 msgbox.exec();
 896                 return;
 897         }
 898
 899         QModelIndex index = selected->currentIndex();
 900         Clip clip = *cliplist_clips->clip(index.row());
 901         QString filename = QFileDialog::getSaveFileName(this,
 902                 "Export multitrack clip", QString(), tr("Matroska video files (*.mkv)"));
 903         if (filename.isNull()) {
 904                 // Cancel.
 905                 return;
 906         }
 907         if (!filename.endsWith(".mkv")) {
 908                 filename += ".mkv";
 909         }
 910         export_multitrack_clip(filename.toStdString(), clip);
 911 }
 912
 913 void MainWindow::export_playlist_clip_interpolated_triggered()
 914 {
 915         QItemSelectionModel *selected = ui->playlist->selectionModel();
 916         if (!selected->hasSelection()) {
 917                 QMessageBox msgbox;
 918                 msgbox.setText("No clip selected in the playlist. Select one and try exporting again.");
 919                 msgbox.exec();
 920                 return;
 921         }
 922
 923         QString filename = QFileDialog::getSaveFileName(this,
 924                 "Export interpolated clip", QString(), tr("Matroska video files (*.mkv)"));
 925         if (filename.isNull()) {
 926                 // Cancel.
 927                 return;
 928         }
 929         if (!filename.endsWith(".mkv")) {
 930                 filename += ".mkv";
 931         }
 932
 933         vector<Clip> clips;
 934         QModelIndexList rows = selected->selectedRows();
 935         for (QModelIndex index : rows) {
 936                 clips.push_back(*playlist_clips->clip(index.row()));
 937         }
 938         export_interpolated_clip(filename.toStdString(), clips);
 939 }
 940
 941 void MainWindow::manual_triggered()
 942 {
 943         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 944                 QMessageBox msgbox;
 945                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 946                 msgbox.exec();
 947         }
 948 }
 949
 950 void MainWindow::about_triggered()
 951 {
 952         AboutDialog("Futatabi", "Multicamera slow motion video server").exec();
 953 }
 954
 955 void MainWindow::undo_triggered()
 956 {
 957         // Finish any deferred action.
 958         if (defer_timeout->isActive()) {
 959                 defer_timeout->stop();
 960                 state_changed(deferred_state);
 961         }
 962
 963         StateProto redo_state;
 964         *redo_state.mutable_clip_list() = cliplist_clips->serialize();
 965         *redo_state.mutable_play_list() = playlist_clips->serialize();
 966         redo_stack.push_back(std::move(redo_state));
 967         ui->redo_action->setEnabled(true);
 968
 969         assert(undo_stack.size() > 1);
 970
 971         // Pop off the current state, which is always at the top of the stack.
 972         undo_stack.pop_back();
 973
 974         StateProto state = undo_stack.back();
 975         ui->undo_action->setEnabled(undo_stack.size() > 1);
 976
 977         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
 978         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
 979
 980         db.store_state(state);
 981 }
 982
 983 void MainWindow::redo_triggered()
 984 {
 985         assert(!redo_stack.empty());
 986
 987         ui->undo_action->setEnabled(true);
 988         ui->redo_action->setEnabled(true);
 989
 990         undo_stack.push_back(std::move(redo_stack.back()));
 991         redo_stack.pop_back();
 992         ui->undo_action->setEnabled(true);
 993         ui->redo_action->setEnabled(!redo_stack.empty());
 994
 995         const StateProto &state = undo_stack.back();
 996         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
 997         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
 998
 999         db.store_state(state);
1000 }
1001
1002 void MainWindow::quality_toggled(int quality, bool checked)
1003 {
1004         if (!checked) {
1005                 return;
1006         }
1007         global_flags.interpolation_quality = quality;
1008         if (quality != 0 &&  // Turning interpolation off is always possible.
1009             quality != flow_initialized_interpolation_quality) {
1010                 QMessageBox msgbox;
1011                 msgbox.setText(QString::fromStdString(
1012                         "The interpolation quality for the main output cannot be changed at runtime, "
1013                         "except being turned completely off; it will take effect for exported files "
1014                         "only until next restart. The live output quality thus remains at " +
1015                         to_string(flow_initialized_interpolation_quality) + "."));
1016                 msgbox.exec();
1017         }
1018
1019         save_settings();
1020 }
1021
1022 void MainWindow::padding_toggled(double seconds, bool checked)
1023 {
1024         if (!checked) {
1025                 return;
1026         }
1027         global_flags.cue_point_padding_seconds = seconds;
1028         save_settings();
1029 }
1030
1031 void MainWindow::highlight_camera_input(int stream_idx)
1032 {
1033         for (unsigned i = 0; i < num_cameras; ++i) {
1034                 if (unsigned(stream_idx) == i) {
1035                         displays[i].frame->setStyleSheet("background: rgb(0,255,0)");
1036                 } else {
1037                         displays[i].frame->setStyleSheet("");
1038                 }
1039         }
1040 }
1041
1042 void MainWindow::enable_or_disable_preview_button()
1043 {
1044         // Follows the logic in preview_clicked().
1045
1046         if (ui->playlist->hasFocus()) {
1047                 // Allow the playlist as preview iff it has focus and something is selected.
1048                 // TODO: Is this part really relevant?
1049                 QItemSelectionModel *selected = ui->playlist->selectionModel();
1050                 if (selected->hasSelection()) {
1051                         ui->preview_btn->setEnabled(true);
1052                         return;
1053                 }
1054         }
1055
1056         // TODO: Perhaps only enable this if something is actually selected.
1057         ui->preview_btn->setEnabled(!cliplist_clips->empty());
1058 }
1059
1060 void MainWindow::set_output_status(const string &status)
1061 {
1062         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
1063         if (live_player != nullptr) {
1064                 live_player->set_pause_status(status);
1065         }
1066
1067         lock_guard<mutex> lock(queue_status_mu);
1068         queue_status = status;
1069 }
1070
1071 pair<string, string> MainWindow::get_queue_status() const
1072 {
1073         lock_guard<mutex> lock(queue_status_mu);
1074         return { queue_status, "text/plain" };
1075 }
1076
1077 void MainWindow::display_frame(unsigned stream_idx, const FrameOnDisk &frame)
1078 {
1079         if (stream_idx >= MAX_STREAMS) {
1080                 fprintf(stderr, "WARNING: Ignoring too-high stream index %u.\n", stream_idx);
1081                 return;
1082         }
1083         if (stream_idx >= num_cameras) {
1084                 post_to_main_thread_and_wait([this, stream_idx] {
1085                         num_cameras = stream_idx + 1;
1086                         change_num_cameras();
1087                 });
1088         }
1089         displays[stream_idx].display->setFrame(stream_idx, frame);
1090 }
1091
1092 template<class Model>
1093 void MainWindow::replace_model(QTableView *view, Model **model, Model *new_model)
1094 {
1095         QItemSelectionModel *old_selection_model = view->selectionModel();
1096         view->setModel(new_model);
1097         delete *model;
1098         delete old_selection_model;
1099         *model = new_model;
1100         connect(new_model, &Model::any_content_changed, this, &MainWindow::content_changed);
1101 }
1102
1103 void MainWindow::start_tally()
1104 {
1105         http_reply = http.get(QNetworkRequest(QString::fromStdString(global_flags.tally_url)));
1106         connect(http_reply, &QNetworkReply::finished, this, &MainWindow::tally_received);
1107 }
1108
1109 void MainWindow::tally_received()
1110 {
1111         unsigned time_to_next_tally_ms;
1112         if (http_reply->error()) {
1113                 fprintf(stderr, "HTTP get of '%s' failed: %s\n", global_flags.tally_url.c_str(),
1114                         http_reply->errorString().toStdString().c_str());
1115                 ui->live_frame->setStyleSheet("");
1116                 time_to_next_tally_ms = 1000;
1117         } else {
1118                 string contents = http_reply->readAll().toStdString();
1119                 ui->live_frame->setStyleSheet(QString::fromStdString("background: " + contents));
1120                 time_to_next_tally_ms = 100;
1121         }
1122         http_reply->deleteLater();
1123         http_reply = nullptr;
1124
1125         QTimer::singleShot(time_to_next_tally_ms, this, &MainWindow::start_tally);
1126 }