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 we are playing, update the part of the playlist that's not playing yet.
 435         vector<ClipWithID> clips;
 436         for (unsigned row = 0; row < playlist_clips->size(); ++row) {
 437                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 438         }
 439         live_player->splice_play(clips);
 440
 441         // Serialize the state.
 442         if (defer_timeout->isActive() &&
 443             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 444                 // There's some deferred event waiting, but this event is unrelated.
 445                 // So it's time to short-circuit that timer and do the work it wanted to do.
 446                 defer_timeout->stop();
 447                 state_changed(deferred_state);
 448         }
 449         StateProto state;
 450         *state.mutable_clip_list() = cliplist_clips->serialize();
 451         *state.mutable_play_list() = playlist_clips->serialize();
 452         if (currently_deferring_model_changes) {
 453                 deferred_change_id = current_change_id;
 454                 deferred_state = std::move(state);
 455                 defer_timeout->start(200);
 456                 return;
 457         }
 458         state_changed(state);
 459 }
 460
 461 void MainWindow::state_changed(const StateProto &state)
 462 {
 463         db.store_state(state);
 464
 465         redo_stack.clear();
 466         ui->redo_action->setEnabled(false);
 467
 468         undo_stack.push_back(state);
 469         ui->undo_action->setEnabled(undo_stack.size() > 1);
 470
 471         // Make sure it doesn't grow without bounds.
 472         while (undo_stack.size() >= 100) {
 473                 undo_stack.pop_front();
 474         }
 475 }
 476
 477 void MainWindow::save_settings()
 478 {
 479         SettingsProto settings;
 480         settings.set_interpolation_quality(global_flags.interpolation_quality + 1);
 481         settings.set_cue_point_padding_seconds(global_flags.cue_point_padding_seconds);
 482         db.store_settings(settings);
 483 }
 484
 485 void MainWindow::play_clicked()
 486 {
 487         if (playlist_clips->empty())
 488                 return;
 489
 490         QItemSelectionModel *selected = ui->playlist->selectionModel();
 491         unsigned start_row;
 492         if (!selected->hasSelection()) {
 493                 start_row = 0;
 494         } else {
 495                 start_row = selected->selectedRows(0)[0].row();
 496         }
 497
 498         vector<ClipWithID> clips;
 499         for (unsigned row = start_row; row < playlist_clips->size(); ++row) {
 500                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 501         }
 502         live_player->play(clips);
 503         playlist_clips->set_progress({ { start_row, 0.0f } });
 504         ui->playlist->selectionModel()->clear();
 505         playlist_selection_changed();
 506
 507         ui->stop_btn->setEnabled(true);
 508 }
 509
 510 void MainWindow::stop_clicked()
 511 {
 512         Clip fake_clip;
 513         fake_clip.pts_in = 0;
 514         fake_clip.pts_out = 0;
 515         playlist_clips->set_progress({});
 516         live_player->play(fake_clip);
 517 }
 518
 519 void MainWindow::live_player_done()
 520 {
 521         playlist_selection_changed();
 522         playlist_clips->set_progress({});
 523         ui->stop_btn->setEnabled(false);
 524 }
 525
 526 static string format_duration(double t)
 527 {
 528         int t_ms = lrint(t * 1e3);
 529
 530         int ms = t_ms % 1000;
 531         t_ms /= 1000;
 532         int s = t_ms % 60;
 533         t_ms /= 60;
 534         int m = t_ms;
 535
 536         char buf[256];
 537         snprintf(buf, sizeof(buf), "%d:%02d.%03d", m, s, ms);
 538         return buf;
 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         unsigned stream_idx = ui->preview_display->get_stream_idx();
 581
 582         if (watched == ui->clip_list) {
 583                 if (event->type() == QEvent::FocusOut) {
 584                         highlight_camera_input(-1);
 585                 }
 586                 return false;
 587         }
 588
 589         if (event->type() != QEvent::Wheel) {
 590                 last_mousewheel_camera_row = -1;
 591         }
 592
 593         if (event->type() == QEvent::MouseButtonPress) {
 594                 QMouseEvent *mouse = (QMouseEvent *)event;
 595
 596                 QTableView *destination;
 597                 ScrubType type;
 598
 599                 if (watched == ui->clip_list->viewport()) {
 600                         destination = ui->clip_list;
 601                         type = SCRUBBING_CLIP_LIST;
 602                 } else if (watched == ui->playlist->viewport()) {
 603                         destination = ui->playlist;
 604                         type = SCRUBBING_PLAYLIST;
 605                 } else {
 606                         return false;
 607                 }
 608                 int column = destination->columnAt(mouse->x());
 609                 int row = destination->rowAt(mouse->y());
 610                 if (column == -1 || row == -1)
 611                         return false;
 612
 613                 if (type == SCRUBBING_CLIP_LIST) {
 614                         if (ClipList::Column(column) == ClipList::Column::IN) {
 615                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 616                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 617                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 618                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 619                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 620                         } else {
 621                                 return false;
 622                         }
 623                 } else {
 624                         if (PlayList::Column(column) == PlayList::Column::IN) {
 625                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 626                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 627                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 628                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 629                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 630                         } else {
 631                                 return false;
 632                         }
 633                 }
 634
 635                 scrubbing = true;
 636                 scrub_row = row;
 637                 scrub_column = column;
 638                 scrub_x_origin = mouse->x();
 639                 scrub_type = type;
 640         } else if (event->type() == QEvent::MouseMove) {
 641                 QMouseEvent *mouse = (QMouseEvent *)event;
 642                 if (mouse->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 643                         scrub_sensitivity *= 10;
 644                         wheel_sensitivity *= 10;
 645                 }
 646                 if (mouse->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 647                         scrub_sensitivity /= 10;
 648                         wheel_sensitivity /= 10;
 649                 }
 650                 if (scrubbing) {
 651                         int offset = mouse->x() - scrub_x_origin;
 652                         int adjusted_offset;
 653                         if (offset >= dead_zone_pixels) {
 654                                 adjusted_offset = offset - dead_zone_pixels;
 655                         } else if (offset < -dead_zone_pixels) {
 656                                 adjusted_offset = offset + dead_zone_pixels;
 657                         } else {
 658                                 adjusted_offset = 0;
 659                         }
 660
 661                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 662                         currently_deferring_model_changes = true;
 663                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 664                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 665                                 if (scrub_column == int(ClipList::Column::IN)) {
 666                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 667                                         set_pts_in(pts, current_pts, clip);
 668                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 669                                 } else {
 670                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 671                                         pts = std::max(pts, clip->pts_in);
 672                                         pts = std::min(pts, current_pts);
 673                                         clip->pts_out = pts;
 674                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 675                                 }
 676                         } else {
 677                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 678                                 if (scrub_column == int(PlayList::Column::IN)) {
 679                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 680                                         set_pts_in(pts, current_pts, clip);
 681                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 682                                 } else {
 683                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 684                                         pts = std::max(pts, clip->pts_in);
 685                                         pts = std::min(pts, current_pts);
 686                                         clip->pts_out = pts;
 687                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 688                                 }
 689                         }
 690                         currently_deferring_model_changes = false;
 691
 692                         return true;  // Don't use this mouse movement for selecting things.
 693                 }
 694         } else if (event->type() == QEvent::Wheel) {
 695                 QWheelEvent *wheel = (QWheelEvent *)event;
 696                 int angle_delta = wheel->angleDelta().y();
 697                 if (wheel->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 698                         scrub_sensitivity *= 10;
 699                         wheel_sensitivity *= 10;
 700                 }
 701                 if (wheel->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 702                         scrub_sensitivity /= 10;
 703                         wheel_sensitivity /= 10;
 704                         angle_delta = wheel->angleDelta().x();  // Qt ickiness.
 705                 }
 706
 707                 QTableView *destination;
 708                 int in_column, out_column, camera_column;
 709                 if (watched == ui->clip_list->viewport()) {
 710                         destination = ui->clip_list;
 711                         in_column = int(ClipList::Column::IN);
 712                         out_column = int(ClipList::Column::OUT);
 713                         camera_column = -1;
 714                         last_mousewheel_camera_row = -1;
 715                 } else if (watched == ui->playlist->viewport()) {
 716                         destination = ui->playlist;
 717                         in_column = int(PlayList::Column::IN);
 718                         out_column = int(PlayList::Column::OUT);
 719                         camera_column = int(PlayList::Column::CAMERA);
 720                 } else {
 721                         last_mousewheel_camera_row = -1;
 722                         return false;
 723                 }
 724                 int column = destination->columnAt(wheel->x());
 725                 int row = destination->rowAt(wheel->y());
 726                 if (column == -1 || row == -1)
 727                         return false;
 728
 729                 // Only adjust pts with the wheel if the given row is selected.
 730                 if (!destination->hasFocus() ||
 731                     row != destination->selectionModel()->currentIndex().row()) {
 732                         return false;
 733                 }
 734
 735                 currently_deferring_model_changes = true;
 736                 {
 737                         current_change_id = (watched == ui->clip_list->viewport()) ? "cliplist:" : "playlist:";
 738                         ClipProxy clip = (watched == ui->clip_list->viewport()) ? cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 739                         if (watched == ui->playlist->viewport()) {
 740                                 stream_idx = clip->stream_idx;
 741                         }
 742
 743                         if (column != camera_column) {
 744                                 last_mousewheel_camera_row = -1;
 745                         }
 746                         if (column == in_column) {
 747                                 current_change_id += "in:" + to_string(row);
 748                                 int64_t pts = clip->pts_in + angle_delta * wheel_sensitivity;
 749                                 set_pts_in(pts, current_pts, clip);
 750                                 preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 751                         } else if (column == out_column) {
 752                                 current_change_id += "out:" + to_string(row);
 753                                 int64_t pts = clip->pts_out + angle_delta * wheel_sensitivity;
 754                                 pts = std::max(pts, clip->pts_in);
 755                                 pts = std::min(pts, current_pts);
 756                                 clip->pts_out = pts;
 757                                 preview_single_frame(pts, stream_idx, LAST_BEFORE);
 758                         } else if (column == camera_column) {
 759                                 current_change_id += "camera:" + to_string(row);
 760                                 int angle_degrees = angle_delta;
 761                                 if (last_mousewheel_camera_row == row) {
 762                                         angle_degrees += leftover_angle_degrees;
 763                                 }
 764
 765                                 int stream_idx = clip->stream_idx + angle_degrees / camera_degrees_per_pixel;
 766                                 stream_idx = std::max(stream_idx, 0);
 767                                 stream_idx = std::min<int>(stream_idx, num_cameras - 1);
 768                                 clip->stream_idx = stream_idx;
 769
 770                                 last_mousewheel_camera_row = row;
 771                                 leftover_angle_degrees = angle_degrees % camera_degrees_per_pixel;
 772
 773                                 // Don't update the live view, that's rarely what the operator wants.
 774                         }
 775                 }
 776                 currently_deferring_model_changes = false;
 777                 return true;  // Don't scroll.
 778         } else if (event->type() == QEvent::MouseButtonRelease) {
 779                 scrubbing = false;
 780         }
 781         return false;
 782 }
 783
 784 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 785 {
 786         if (rounding == LAST_BEFORE) {
 787                 lock_guard<mutex> lock(frame_mu);
 788                 if (frames[stream_idx].empty())
 789                         return;
 790                 auto it = find_last_frame_before(frames[stream_idx], pts);
 791                 if (it != frames[stream_idx].end()) {
 792                         pts = it->pts;
 793                 }
 794         } else {
 795                 assert(rounding == FIRST_AT_OR_AFTER);
 796                 lock_guard<mutex> lock(frame_mu);
 797                 if (frames[stream_idx].empty())
 798                         return;
 799                 auto it = find_first_frame_at_or_after(frames[stream_idx], pts);
 800                 if (it != frames[stream_idx].end()) {
 801                         pts = it->pts;
 802                 }
 803         }
 804
 805         Clip fake_clip;
 806         fake_clip.pts_in = pts;
 807         fake_clip.pts_out = pts + 1;
 808         preview_player->play(fake_clip);
 809 }
 810
 811 void MainWindow::playlist_selection_changed()
 812 {
 813         QItemSelectionModel *selected = ui->playlist->selectionModel();
 814         bool any_selected = selected->hasSelection();
 815         ui->playlist_duplicate_btn->setEnabled(any_selected);
 816         ui->playlist_remove_btn->setEnabled(any_selected);
 817         ui->playlist_move_up_btn->setEnabled(
 818                 any_selected && selected->selectedRows().front().row() > 0);
 819         ui->playlist_move_down_btn->setEnabled(
 820                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 821         ui->play_btn->setEnabled(!playlist_clips->empty());
 822
 823         if (!any_selected) {
 824                 set_output_status("paused");
 825         } else {
 826                 vector<ClipWithID> clips;
 827                 for (size_t row = selected->selectedRows().front().row(); row < playlist_clips->size(); ++row) {
 828                         clips.emplace_back(*playlist_clips->clip_with_id(row));
 829                 }
 830                 double remaining = compute_total_time(clips);
 831                 set_output_status(format_duration(remaining) + " ready");
 832         }
 833 }
 834
 835 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &)
 836 {
 837         int camera_selected = -1;
 838         if (cliplist_clips->is_camera_column(current.column())) {
 839                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 840         }
 841         highlight_camera_input(camera_selected);
 842 }
 843
 844 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 845 {
 846         char time_str[256];
 847         if (estimated_seconds_left < 60.0) {
 848                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 849         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 850                 int s = lrintf(estimated_seconds_left);
 851                 int m = s / 60;
 852                 s %= 60;
 853                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 854         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 855                 int m = lrintf(estimated_seconds_left / 60.0);
 856                 snprintf(time_str, sizeof(time_str), "%dm", m);
 857         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 858                 int m = lrintf(estimated_seconds_left / 60.0);
 859                 int h = m / 60;
 860                 m %= 60;
 861                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 862         } else {  // More than ten hours: Xh.
 863                 int h = lrintf(estimated_seconds_left / 3600.0);
 864                 snprintf(time_str, sizeof(time_str), "%dh", h);
 865         }
 866         char buf[256];
 867         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 868
 869         std::string label = buf;
 870
 871         post_to_main_thread([this, label] {
 872                 disk_free_label->setText(QString::fromStdString(label));
 873                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 874         });
 875 }
 876
 877 void MainWindow::exit_triggered()
 878 {
 879         close();
 880 }
 881
 882 void MainWindow::export_cliplist_clip_multitrack_triggered()
 883 {
 884         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 885         if (!selected->hasSelection()) {
 886                 QMessageBox msgbox;
 887                 msgbox.setText("No clip selected in the clip list. Select one and try exporting again.");
 888                 msgbox.exec();
 889                 return;
 890         }
 891
 892         QModelIndex index = selected->currentIndex();
 893         Clip clip = *cliplist_clips->clip(index.row());
 894         QString filename = QFileDialog::getSaveFileName(this,
 895                 "Export multitrack clip", QString(), tr("Matroska video files (*.mkv)"));
 896         if (filename.isNull()) {
 897                 // Cancel.
 898                 return;
 899         }
 900         if (!filename.endsWith(".mkv")) {
 901                 filename += ".mkv";
 902         }
 903         export_multitrack_clip(filename.toStdString(), clip);
 904 }
 905
 906 void MainWindow::export_playlist_clip_interpolated_triggered()
 907 {
 908         QItemSelectionModel *selected = ui->playlist->selectionModel();
 909         if (!selected->hasSelection()) {
 910                 QMessageBox msgbox;
 911                 msgbox.setText("No clip selected in the playlist. Select one and try exporting again.");
 912                 msgbox.exec();
 913                 return;
 914         }
 915
 916         QString filename = QFileDialog::getSaveFileName(this,
 917                 "Export interpolated clip", QString(), tr("Matroska video files (*.mkv)"));
 918         if (filename.isNull()) {
 919                 // Cancel.
 920                 return;
 921         }
 922         if (!filename.endsWith(".mkv")) {
 923                 filename += ".mkv";
 924         }
 925
 926         vector<Clip> clips;
 927         QModelIndexList rows = selected->selectedRows();
 928         for (QModelIndex index : rows) {
 929                 clips.push_back(*playlist_clips->clip(index.row()));
 930         }
 931         export_interpolated_clip(filename.toStdString(), clips);
 932 }
 933
 934 void MainWindow::manual_triggered()
 935 {
 936         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 937                 QMessageBox msgbox;
 938                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 939                 msgbox.exec();
 940         }
 941 }
 942
 943 void MainWindow::about_triggered()
 944 {
 945         AboutDialog("Futatabi", "Multicamera slow motion video server").exec();
 946 }
 947
 948 void MainWindow::undo_triggered()
 949 {
 950         // Finish any deferred action.
 951         if (defer_timeout->isActive()) {
 952                 defer_timeout->stop();
 953                 state_changed(deferred_state);
 954         }
 955
 956         StateProto redo_state;
 957         *redo_state.mutable_clip_list() = cliplist_clips->serialize();
 958         *redo_state.mutable_play_list() = playlist_clips->serialize();
 959         redo_stack.push_back(std::move(redo_state));
 960         ui->redo_action->setEnabled(true);
 961
 962         assert(undo_stack.size() > 1);
 963
 964         // Pop off the current state, which is always at the top of the stack.
 965         undo_stack.pop_back();
 966
 967         StateProto state = undo_stack.back();
 968         ui->undo_action->setEnabled(undo_stack.size() > 1);
 969
 970         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
 971         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
 972
 973         db.store_state(state);
 974 }
 975
 976 void MainWindow::redo_triggered()
 977 {
 978         assert(!redo_stack.empty());
 979
 980         ui->undo_action->setEnabled(true);
 981         ui->redo_action->setEnabled(true);
 982
 983         undo_stack.push_back(std::move(redo_stack.back()));
 984         redo_stack.pop_back();
 985         ui->undo_action->setEnabled(true);
 986         ui->redo_action->setEnabled(!redo_stack.empty());
 987
 988         const StateProto &state = undo_stack.back();
 989         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
 990         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
 991
 992         db.store_state(state);
 993 }
 994
 995 void MainWindow::quality_toggled(int quality, bool checked)
 996 {
 997         if (!checked) {
 998                 return;
 999         }
1000         global_flags.interpolation_quality = quality;
1001         if (quality != 0 &&  // Turning interpolation off is always possible.
1002             quality != flow_initialized_interpolation_quality) {
1003                 QMessageBox msgbox;
1004                 msgbox.setText(QString::fromStdString(
1005                         "The interpolation quality for the main output cannot be changed at runtime, "
1006                         "except being turned completely off; it will take effect for exported files "
1007                         "only until next restart. The live output quality thus remains at " +
1008                         to_string(flow_initialized_interpolation_quality) + "."));
1009                 msgbox.exec();
1010         }
1011
1012         save_settings();
1013 }
1014
1015 void MainWindow::padding_toggled(double seconds, bool checked)
1016 {
1017         if (!checked) {
1018                 return;
1019         }
1020         global_flags.cue_point_padding_seconds = seconds;
1021         save_settings();
1022 }
1023
1024 void MainWindow::highlight_camera_input(int stream_idx)
1025 {
1026         for (unsigned i = 0; i < num_cameras; ++i) {
1027                 if (unsigned(stream_idx) == i) {
1028                         displays[i].frame->setStyleSheet("background: rgb(0,255,0)");
1029                 } else {
1030                         displays[i].frame->setStyleSheet("");
1031                 }
1032         }
1033 }
1034
1035 void MainWindow::set_output_status(const string &status)
1036 {
1037         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
1038
1039         lock_guard<mutex> lock(queue_status_mu);
1040         queue_status = status;
1041 }
1042
1043 pair<string, string> MainWindow::get_queue_status() const
1044 {
1045         lock_guard<mutex> lock(queue_status_mu);
1046         return { queue_status, "text/plain" };
1047 }
1048
1049 void MainWindow::display_frame(unsigned stream_idx, const FrameOnDisk &frame)
1050 {
1051         if (stream_idx >= MAX_STREAMS) {
1052                 fprintf(stderr, "WARNING: Ignoring too-high stream index %u.\n", stream_idx);
1053                 return;
1054         }
1055         if (stream_idx >= num_cameras) {
1056                 post_to_main_thread_and_wait([this, stream_idx] {
1057                         num_cameras = stream_idx + 1;
1058                         change_num_cameras();
1059                 });
1060         }
1061         displays[stream_idx].display->setFrame(stream_idx, frame);
1062 }
1063
1064 template<class Model>
1065 void MainWindow::replace_model(QTableView *view, Model **model, Model *new_model)
1066 {
1067         QItemSelectionModel *old_selection_model = view->selectionModel();
1068         view->setModel(new_model);
1069         delete *model;
1070         delete old_selection_model;
1071         *model = new_model;
1072         connect(new_model, &Model::any_content_changed, this, &MainWindow::content_changed);
1073 }
1074
1075 void MainWindow::start_tally()
1076 {
1077         http_reply = http.get(QNetworkRequest(QString::fromStdString(global_flags.tally_url)));
1078         connect(http_reply, &QNetworkReply::finished, this, &MainWindow::tally_received);
1079 }
1080
1081 void MainWindow::tally_received()
1082 {
1083         unsigned time_to_next_tally_ms;
1084         if (http_reply->error()) {
1085                 fprintf(stderr, "HTTP get of '%s' failed: %s\n", global_flags.tally_url.c_str(),
1086                         http_reply->errorString().toStdString().c_str());
1087                 ui->live_frame->setStyleSheet("");
1088                 time_to_next_tally_ms = 1000;
1089         } else {
1090                 string contents = http_reply->readAll().toStdString();
1091                 ui->live_frame->setStyleSheet(QString::fromStdString("background: " + contents));
1092                 time_to_next_tally_ms = 100;
1093         }
1094         http_reply->deleteLater();
1095         http_reply = nullptr;
1096
1097         QTimer::singleShot(time_to_next_tally_ms, this, &MainWindow::start_tally);
1098 }