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

   1 #include "mainwindow.h"
   2
   3 #include "shared/aboutdialog.h"
   4 #include "clip_list.h"
   5 #include "export.h"
   6 #include "shared/disk_space_estimator.h"
   7 #include "flags.h"
   8 #include "frame_on_disk.h"
   9 #include "player.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_clip_done();
 190                 });
 191         });
 192         live_player->set_next_clip_callback(bind(&MainWindow::live_player_get_next_clip, this));
 193         live_player->set_progress_callback([this](const map<size_t, double> &progress) {
 194                 post_to_main_thread([this, progress] {
 195                         live_player_clip_progress(progress);
 196                 });
 197         });
 198         set_output_status("paused");
 199
 200         defer_timeout = new QTimer(this);
 201         defer_timeout->setSingleShot(true);
 202         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 203         ui->undo_action->setEnabled(true);
 204
 205         connect(ui->clip_list->selectionModel(), &QItemSelectionModel::currentChanged,
 206                 this, &MainWindow::clip_list_selection_changed);
 207
 208         // Find out how many cameras we have in the existing frames;
 209         // if none, we start with two cameras.
 210         num_cameras = 2;
 211         {
 212                 lock_guard<mutex> lock(frame_mu);
 213                 for (size_t stream_idx = 2; stream_idx < MAX_STREAMS; ++stream_idx) {
 214                         if (!frames[stream_idx].empty()) {
 215                                 num_cameras = stream_idx + 1;
 216                         }
 217                 }
 218         }
 219         change_num_cameras();
 220
 221         if (!global_flags.tally_url.empty()) {
 222                 start_tally();
 223         }
 224 }
 225
 226 void MainWindow::change_num_cameras()
 227 {
 228         assert(num_cameras >= displays.size());  // We only add, never remove.
 229
 230         // Make new display rows.
 231         unsigned display_rows = (num_cameras + 1) / 2;
 232         ui->video_displays->setStretch(1, display_rows);
 233         for (unsigned i = displays.size(); i < num_cameras; ++i) {
 234                 QFrame *frame = new QFrame(this);
 235                 frame->setAutoFillBackground(true);
 236
 237                 QLayout *layout = new QGridLayout(frame);
 238                 frame->setLayout(layout);
 239                 layout->setContentsMargins(3, 3, 3, 3);
 240
 241                 JPEGFrameView *display = new JPEGFrameView(frame);
 242                 display->setAutoFillBackground(true);
 243                 layout->addWidget(display);
 244
 245                 ui->input_displays->addWidget(frame, i / 2, i % 2);
 246                 display->set_overlay(to_string(i + 1));
 247
 248                 QPushButton *preview_btn = new QPushButton(this);
 249                 preview_btn->setMaximumSize(20, 17);
 250                 preview_btn->setText(QString::fromStdString(to_string(i + 1)));
 251                 ui->preview_layout->addWidget(preview_btn);
 252
 253                 displays.emplace_back(FrameAndDisplay{ frame, display, preview_btn });
 254
 255                 connect(display, &JPEGFrameView::clicked, preview_btn, &QPushButton::click);
 256                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 257                 connect(shortcut, &QShortcut::activated, preview_btn, &QPushButton::click);
 258
 259                 connect(preview_btn, &QPushButton::clicked, [this, i]{ preview_angle_clicked(i); });
 260         }
 261
 262         cliplist_clips->change_num_cameras(num_cameras);
 263         playlist_clips->change_num_cameras(num_cameras);
 264
 265         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 266 }
 267
 268 MainWindow::~MainWindow()
 269 {
 270         // Empty so that we can forward-declare Player in the .h file.
 271 }
 272
 273 void MainWindow::cue_in_clicked()
 274 {
 275         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 276                 cliplist_clips->mutable_back()->pts_in = current_pts;
 277                 return;
 278         }
 279         Clip clip;
 280         clip.pts_in = max<int64_t>(current_pts - lrint(global_flags.cue_point_padding_seconds * TIMEBASE), 0);
 281         cliplist_clips->add_clip(clip);
 282         playlist_selection_changed();
 283         ui->clip_list->scrollToBottom();
 284 }
 285
 286 void MainWindow::cue_out_clicked()
 287 {
 288         if (!cliplist_clips->empty()) {
 289                 cliplist_clips->mutable_back()->pts_out = current_pts + lrint(global_flags.cue_point_padding_seconds * TIMEBASE);
 290                 // TODO: select the row in the clip list?
 291         }
 292 }
 293
 294 void MainWindow::queue_clicked()
 295 {
 296         if (cliplist_clips->empty()) {
 297                 return;
 298         }
 299
 300         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 301         if (!selected->hasSelection()) {
 302                 Clip clip = *cliplist_clips->back();
 303                 clip.stream_idx = 0;
 304                 if (clip.pts_out != -1) {
 305                         playlist_clips->add_clip(clip);
 306                         playlist_selection_changed();
 307                         ui->playlist->scrollToBottom();
 308                 }
 309                 return;
 310         }
 311
 312         QModelIndex index = selected->currentIndex();
 313         Clip clip = *cliplist_clips->clip(index.row());
 314         if (cliplist_clips->is_camera_column(index.column())) {
 315                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 316         } else {
 317                 clip.stream_idx = ui->preview_display->get_stream_idx();
 318         }
 319
 320         if (clip.pts_out != -1) {
 321                 playlist_clips->add_clip(clip);
 322                 playlist_selection_changed();
 323                 ui->playlist->scrollToBottom();
 324                 if (!ui->playlist->selectionModel()->hasSelection()) {
 325                         // TODO: Figure out why this doesn't always seem to actually select the row.
 326                         QModelIndex bottom = playlist_clips->index(playlist_clips->size() - 1, 0);
 327                         ui->playlist->setCurrentIndex(bottom);
 328                 }
 329         }
 330 }
 331
 332 void MainWindow::preview_clicked()
 333 {
 334         if (ui->playlist->hasFocus()) {
 335                 // Allow the playlist as preview iff it has focus and something is selected.
 336                 QItemSelectionModel *selected = ui->playlist->selectionModel();
 337                 if (selected->hasSelection()) {
 338                         QModelIndex index = selected->currentIndex();
 339                         const Clip &clip = *playlist_clips->clip(index.row());
 340                         preview_player->play_clip(clip, index.row(), clip.stream_idx);
 341                         return;
 342                 }
 343         }
 344
 345         if (cliplist_clips->empty())
 346                 return;
 347
 348         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 349         if (!selected->hasSelection()) {
 350                 preview_player->play_clip(*cliplist_clips->back(), cliplist_clips->size() - 1, 0);
 351                 return;
 352         }
 353
 354         QModelIndex index = selected->currentIndex();
 355         unsigned stream_idx;
 356         if (cliplist_clips->is_camera_column(index.column())) {
 357                 stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 358         } else {
 359                 stream_idx = ui->preview_display->get_stream_idx();
 360         }
 361         preview_player->play_clip(*cliplist_clips->clip(index.row()), index.row(), stream_idx);
 362 }
 363
 364 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 365 {
 366         preview_player->override_angle(stream_idx);
 367
 368         // Change the selection if we were previewing a clip from the clip list.
 369         // (The only other thing we could be showing is a pts scrub, and if so,
 370         // that would be selected.)
 371         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 372         if (selected->hasSelection()) {
 373                 QModelIndex cell = selected->selectedIndexes()[0];
 374                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 375                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 376         }
 377 }
 378
 379 void MainWindow::playlist_duplicate()
 380 {
 381         QItemSelectionModel *selected = ui->playlist->selectionModel();
 382         if (!selected->hasSelection()) {
 383                 // Should have been grayed out, but OK.
 384                 return;
 385         }
 386         QModelIndexList rows = selected->selectedRows();
 387         int first = rows.front().row(), last = rows.back().row();
 388         playlist_clips->duplicate_clips(first, last);
 389         playlist_selection_changed();
 390 }
 391
 392 void MainWindow::playlist_remove()
 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->erase_clips(first, last);
 402
 403         // TODO: select the next one in the list?
 404
 405         playlist_selection_changed();
 406 }
 407
 408 void MainWindow::playlist_move(int delta)
 409 {
 410         QItemSelectionModel *selected = ui->playlist->selectionModel();
 411         if (!selected->hasSelection()) {
 412                 // Should have been grayed out, but OK.
 413                 return;
 414         }
 415
 416         QModelIndexList rows = selected->selectedRows();
 417         int first = rows.front().row(), last = rows.back().row();
 418         if ((delta == -1 && first == 0) ||
 419             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 420                 // Should have been grayed out, but OK.
 421                 return;
 422         }
 423
 424         playlist_clips->move_clips(first, last, delta);
 425         playlist_selection_changed();
 426 }
 427
 428 void MainWindow::defer_timer_expired()
 429 {
 430         state_changed(deferred_state);
 431 }
 432
 433 void MainWindow::content_changed()
 434 {
 435         if (defer_timeout->isActive() &&
 436             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 437                 // There's some deferred event waiting, but this event is unrelated.
 438                 // So it's time to short-circuit that timer and do the work it wanted to do.
 439                 defer_timeout->stop();
 440                 state_changed(deferred_state);
 441         }
 442         StateProto state;
 443         *state.mutable_clip_list() = cliplist_clips->serialize();
 444         *state.mutable_play_list() = playlist_clips->serialize();
 445         if (currently_deferring_model_changes) {
 446                 deferred_change_id = current_change_id;
 447                 deferred_state = std::move(state);
 448                 defer_timeout->start(200);
 449                 return;
 450         }
 451         state_changed(state);
 452 }
 453
 454 void MainWindow::state_changed(const StateProto &state)
 455 {
 456         db.store_state(state);
 457
 458         redo_stack.clear();
 459         ui->redo_action->setEnabled(false);
 460
 461         undo_stack.push_back(state);
 462         ui->undo_action->setEnabled(undo_stack.size() > 1);
 463
 464         // Make sure it doesn't grow without bounds.
 465         while (undo_stack.size() >= 100) {
 466                 undo_stack.pop_front();
 467         }
 468 }
 469
 470 void MainWindow::save_settings()
 471 {
 472         SettingsProto settings;
 473         settings.set_interpolation_quality(global_flags.interpolation_quality + 1);
 474         settings.set_cue_point_padding_seconds(global_flags.cue_point_padding_seconds);
 475         db.store_settings(settings);
 476 }
 477
 478 void MainWindow::play_clicked()
 479 {
 480         if (playlist_clips->empty())
 481                 return;
 482
 483         QItemSelectionModel *selected = ui->playlist->selectionModel();
 484         int row;
 485         if (!selected->hasSelection()) {
 486                 row = 0;
 487         } else {
 488                 row = selected->selectedRows(0)[0].row();
 489         }
 490
 491         const Clip &clip = *playlist_clips->clip(row);
 492         live_player->play_clip(clip, row, clip.stream_idx);
 493         playlist_clips->set_progress({{ row, 0.0f }});
 494         playlist_clips->set_currently_playing(row, 0.0f);
 495         playlist_selection_changed();
 496
 497         ui->stop_btn->setEnabled(true);
 498 }
 499
 500 void MainWindow::stop_clicked()
 501 {
 502         Clip fake_clip;
 503         fake_clip.pts_in = 0;
 504         fake_clip.pts_out = 0;
 505         size_t last_row = playlist_clips->size() - 1;
 506         playlist_clips->set_currently_playing(last_row, 0.0f);
 507         live_player->play_clip(fake_clip, last_row, 0);
 508 }
 509
 510 void MainWindow::live_player_clip_done()
 511 {
 512         int row = playlist_clips->get_currently_playing();
 513         if (row == -1 || row == int(playlist_clips->size()) - 1) {
 514                 set_output_status("paused");
 515                 playlist_clips->set_progress({});
 516                 playlist_clips->set_currently_playing(-1, 0.0f);
 517         } else {
 518                 playlist_clips->set_progress({{ row + 1, 0.0f }});
 519                 playlist_clips->set_currently_playing(row + 1, 0.0f);
 520         }
 521         ui->stop_btn->setEnabled(false);
 522 }
 523
 524 pair<Clip, size_t> MainWindow::live_player_get_next_clip()
 525 {
 526         // playlist_clips can only be accessed on the main thread.
 527         // Hopefully, we won't have to wait too long for this to come back.
 528         //
 529         // TODO: If MainWindow is in the process of being destroyed and waiting
 530         // for Player to shut down, we could have a deadlock here.
 531         promise<pair<Clip, size_t>> clip_promise;
 532         future<pair<Clip, size_t>> clip = clip_promise.get_future();
 533         post_to_main_thread([&clip_promise] {
 534                 int row = playlist_clips->get_currently_playing();
 535                 if (row != -1 && row < int(playlist_clips->size()) - 1) {
 536                         clip_promise.set_value(make_pair(*playlist_clips->clip(row + 1), row + 1));
 537                 } else {
 538                         clip_promise.set_value(make_pair(Clip(), 0));
 539                 }
 540         });
 541         return clip.get();
 542 }
 543
 544 static string format_duration(double t)
 545 {
 546         int t_ms = lrint(t * 1e3);
 547
 548         int ms = t_ms % 1000;
 549         t_ms /= 1000;
 550         int s = t_ms % 60;
 551         t_ms /= 60;
 552         int m = t_ms;
 553
 554         char buf[256];
 555         snprintf(buf, sizeof(buf), "%d:%02d.%03d", m, s, ms);
 556         return buf;
 557 }
 558
 559 void MainWindow::live_player_clip_progress(const map<size_t, double> &progress)
 560 {
 561         playlist_clips->set_progress(progress);
 562
 563         vector<Clip> clips;
 564         for (size_t row = 0; row < playlist_clips->size(); ++row) {
 565                 clips.push_back(*playlist_clips->clip(row));
 566         }
 567         double remaining = compute_time_left(clips, progress);
 568         set_output_status(format_duration(remaining) + " left");
 569 }
 570
 571 void MainWindow::resizeEvent(QResizeEvent *event)
 572 {
 573         QMainWindow::resizeEvent(event);
 574
 575         // Ask for a relayout, but only after the event loop is done doing relayout
 576         // on everything else.
 577         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 578 }
 579
 580 void MainWindow::relayout()
 581 {
 582         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 583         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 584 }
 585
 586 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
 587 {
 588         pts = std::max<int64_t>(pts, 0);
 589         if (clip->pts_out == -1) {
 590                 pts = std::min(pts, current_pts);
 591         } else {
 592                 pts = std::min(pts, clip->pts_out);
 593         }
 594         clip->pts_in = pts;
 595 }
 596
 597 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 598 {
 599         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 600         constexpr int camera_degrees_per_pixel = 15;  // One click of most mice.
 601         int scrub_sensitivity = 100;  // pts units per pixel.
 602         int wheel_sensitivity = 100;  // pts units per degree.
 603
 604         unsigned stream_idx = ui->preview_display->get_stream_idx();
 605
 606         if (watched == ui->clip_list) {
 607                 if (event->type() == QEvent::FocusOut) {
 608                         highlight_camera_input(-1);
 609                 }
 610                 return false;
 611         }
 612
 613         if (event->type() != QEvent::Wheel) {
 614                 last_mousewheel_camera_row = -1;
 615         }
 616
 617         if (event->type() == QEvent::MouseButtonPress) {
 618                 QMouseEvent *mouse = (QMouseEvent *)event;
 619
 620                 QTableView *destination;
 621                 ScrubType type;
 622
 623                 if (watched == ui->clip_list->viewport()) {
 624                         destination = ui->clip_list;
 625                         type = SCRUBBING_CLIP_LIST;
 626                 } else if (watched == ui->playlist->viewport()) {
 627                         destination = ui->playlist;
 628                         type = SCRUBBING_PLAYLIST;
 629                 } else {
 630                         return false;
 631                 }
 632                 int column = destination->columnAt(mouse->x());
 633                 int row = destination->rowAt(mouse->y());
 634                 if (column == -1 || row == -1)
 635                         return false;
 636
 637                 if (type == SCRUBBING_CLIP_LIST) {
 638                         if (ClipList::Column(column) == ClipList::Column::IN) {
 639                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 640                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 641                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 642                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 643                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 644                         } else {
 645                                 return false;
 646                         }
 647                 } else {
 648                         if (PlayList::Column(column) == PlayList::Column::IN) {
 649                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 650                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 651                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 652                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 653                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 654                         } else {
 655                                 return false;
 656                         }
 657                 }
 658
 659                 scrubbing = true;
 660                 scrub_row = row;
 661                 scrub_column = column;
 662                 scrub_x_origin = mouse->x();
 663                 scrub_type = type;
 664         } else if (event->type() == QEvent::MouseMove) {
 665                 QMouseEvent *mouse = (QMouseEvent *)event;
 666                 if (mouse->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 667                         scrub_sensitivity *= 10;
 668                         wheel_sensitivity *= 10;
 669                 }
 670                 if (mouse->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 671                         scrub_sensitivity /= 10;
 672                         wheel_sensitivity /= 10;
 673                 }
 674                 if (scrubbing) {
 675                         int offset = mouse->x() - scrub_x_origin;
 676                         int adjusted_offset;
 677                         if (offset >= dead_zone_pixels) {
 678                                 adjusted_offset = offset - dead_zone_pixels;
 679                         } else if (offset < -dead_zone_pixels) {
 680                                 adjusted_offset = offset + dead_zone_pixels;
 681                         } else {
 682                                 adjusted_offset = 0;
 683                         }
 684
 685                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 686                         currently_deferring_model_changes = true;
 687                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 688                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 689                                 if (scrub_column == int(ClipList::Column::IN)) {
 690                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 691                                         set_pts_in(pts, current_pts, clip);
 692                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 693                                 } else {
 694                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 695                                         pts = std::max(pts, clip->pts_in);
 696                                         pts = std::min(pts, current_pts);
 697                                         clip->pts_out = pts;
 698                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 699                                 }
 700                         } else {
 701                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 702                                 if (scrub_column == int(PlayList::Column::IN)) {
 703                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 704                                         set_pts_in(pts, current_pts, clip);
 705                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 706                                 } else {
 707                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 708                                         pts = std::max(pts, clip->pts_in);
 709                                         pts = std::min(pts, current_pts);
 710                                         clip->pts_out = pts;
 711                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 712                                 }
 713                         }
 714                         currently_deferring_model_changes = false;
 715
 716                         return true;  // Don't use this mouse movement for selecting things.
 717                 }
 718         } else if (event->type() == QEvent::Wheel) {
 719                 QWheelEvent *wheel = (QWheelEvent *)event;
 720                 int angle_delta = wheel->angleDelta().y();
 721                 if (wheel->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 722                         scrub_sensitivity *= 10;
 723                         wheel_sensitivity *= 10;
 724                 }
 725                 if (wheel->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 726                         scrub_sensitivity /= 10;
 727                         wheel_sensitivity /= 10;
 728                         angle_delta = wheel->angleDelta().x();  // Qt ickiness.
 729                 }
 730
 731                 QTableView *destination;
 732                 int in_column, out_column, camera_column;
 733                 if (watched == ui->clip_list->viewport()) {
 734                         destination = ui->clip_list;
 735                         in_column = int(ClipList::Column::IN);
 736                         out_column = int(ClipList::Column::OUT);
 737                         camera_column = -1;
 738                         last_mousewheel_camera_row = -1;
 739                 } else if (watched == ui->playlist->viewport()) {
 740                         destination = ui->playlist;
 741                         in_column = int(PlayList::Column::IN);
 742                         out_column = int(PlayList::Column::OUT);
 743                         camera_column = int(PlayList::Column::CAMERA);
 744                 } else {
 745                         last_mousewheel_camera_row = -1;
 746                         return false;
 747                 }
 748                 int column = destination->columnAt(wheel->x());
 749                 int row = destination->rowAt(wheel->y());
 750                 if (column == -1 || row == -1) return false;
 751
 752                 // Only adjust pts with the wheel if the given row is selected.
 753                 if (!destination->hasFocus() ||
 754                     row != destination->selectionModel()->currentIndex().row()) {
 755                         return false;
 756                 }
 757
 758                 currently_deferring_model_changes = true;
 759                 {
 760                         current_change_id = (watched == ui->clip_list->viewport()) ? "cliplist:" : "playlist:";
 761                         ClipProxy clip = (watched == ui->clip_list->viewport()) ?
 762                                 cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 763                         if (watched == ui->playlist->viewport()) {
 764                                 stream_idx = clip->stream_idx;
 765                         }
 766
 767                         if (column != camera_column) {
 768                                 last_mousewheel_camera_row = -1;
 769                         }
 770                         if (column == in_column) {
 771                                 current_change_id += "in:" + to_string(row);
 772                                 int64_t pts = clip->pts_in + angle_delta * wheel_sensitivity;
 773                                 set_pts_in(pts, current_pts, clip);
 774                                 preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 775                         } else if (column == out_column) {
 776                                 current_change_id += "out:" + to_string(row);
 777                                 int64_t pts = clip->pts_out + angle_delta * wheel_sensitivity;
 778                                 pts = std::max(pts, clip->pts_in);
 779                                 pts = std::min(pts, current_pts);
 780                                 clip->pts_out = pts;
 781                                 preview_single_frame(pts, stream_idx, LAST_BEFORE);
 782                         } else if (column == camera_column) {
 783                                 current_change_id += "camera:" + to_string(row);
 784                                 int angle_degrees = angle_delta;
 785                                 if (last_mousewheel_camera_row == row) {
 786                                         angle_degrees += leftover_angle_degrees;
 787                                 }
 788
 789                                 int stream_idx = clip->stream_idx + angle_degrees / camera_degrees_per_pixel;
 790                                 stream_idx = std::max(stream_idx, 0);
 791                                 stream_idx = std::min<int>(stream_idx, num_cameras - 1);
 792                                 clip->stream_idx = stream_idx;
 793
 794                                 last_mousewheel_camera_row = row;
 795                                 leftover_angle_degrees = angle_degrees % camera_degrees_per_pixel;
 796
 797                                 // Don't update the live view, that's rarely what the operator wants.
 798                         }
 799                 }
 800                 currently_deferring_model_changes = false;
 801                 return true;  // Don't scroll.
 802         } else if (event->type() == QEvent::MouseButtonRelease) {
 803                 scrubbing = false;
 804         }
 805         return false;
 806 }
 807
 808 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 809 {
 810         if (rounding == LAST_BEFORE) {
 811                 lock_guard<mutex> lock(frame_mu);
 812                 if (frames[stream_idx].empty())
 813                         return;
 814                 auto it = find_last_frame_before(frames[stream_idx], pts);
 815                 if (it != frames[stream_idx].end()) {
 816                         pts = it->pts;
 817                 }
 818         } else {
 819                 assert(rounding == FIRST_AT_OR_AFTER);
 820                 lock_guard<mutex> lock(frame_mu);
 821                 if (frames[stream_idx].empty())
 822                         return;
 823                 auto it = find_first_frame_at_or_after(frames[stream_idx], pts);
 824                 if (it != frames[stream_idx].end()) {
 825                         pts = it->pts;
 826                 }
 827         }
 828
 829         Clip fake_clip;
 830         fake_clip.pts_in = pts;
 831         fake_clip.pts_out = pts + 1;
 832         preview_player->play_clip(fake_clip, 0, stream_idx);
 833 }
 834
 835 void MainWindow::playlist_selection_changed()
 836 {
 837         QItemSelectionModel *selected = ui->playlist->selectionModel();
 838         bool any_selected = selected->hasSelection();
 839         ui->playlist_duplicate_btn->setEnabled(any_selected);
 840         ui->playlist_remove_btn->setEnabled(any_selected);
 841         ui->playlist_move_up_btn->setEnabled(
 842                 any_selected && selected->selectedRows().front().row() > 0);
 843         ui->playlist_move_down_btn->setEnabled(
 844                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 845         ui->play_btn->setEnabled(!playlist_clips->empty());
 846
 847         if (!any_selected) {
 848                 set_output_status("paused");
 849         } else {
 850                 vector<Clip> clips;
 851                 for (size_t row = 0; row < playlist_clips->size(); ++row) {
 852                         clips.push_back(*playlist_clips->clip(row));
 853                 }
 854                 double remaining = compute_time_left(clips, {{selected->selectedRows().front().row(), 0.0}});
 855                 set_output_status(format_duration(remaining) + " ready");
 856         }
 857 }
 858
 859 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &)
 860 {
 861         int camera_selected = -1;
 862         if (cliplist_clips->is_camera_column(current.column())) {
 863                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 864         }
 865         highlight_camera_input(camera_selected);
 866 }
 867
 868 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 869 {
 870         char time_str[256];
 871         if (estimated_seconds_left < 60.0) {
 872                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 873         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 874                 int s = lrintf(estimated_seconds_left);
 875                 int m = s / 60;
 876                 s %= 60;
 877                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 878         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 879                 int m = lrintf(estimated_seconds_left / 60.0);
 880                 snprintf(time_str, sizeof(time_str), "%dm", m);
 881         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 882                 int m = lrintf(estimated_seconds_left / 60.0);
 883                 int h = m / 60;
 884                 m %= 60;
 885                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 886         } else {  // More than ten hours: Xh.
 887                 int h = lrintf(estimated_seconds_left / 3600.0);
 888                 snprintf(time_str, sizeof(time_str), "%dh", h);
 889         }
 890         char buf[256];
 891         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 892
 893         std::string label = buf;
 894
 895         post_to_main_thread([this, label] {
 896                 disk_free_label->setText(QString::fromStdString(label));
 897                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 898         });
 899 }
 900
 901 void MainWindow::exit_triggered()
 902 {
 903         close();
 904 }
 905
 906 void MainWindow::export_cliplist_clip_multitrack_triggered()
 907 {
 908         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 909         if (!selected->hasSelection()) {
 910                 QMessageBox msgbox;
 911                 msgbox.setText("No clip selected in the clip list. Select one and try exporting again.");
 912                 msgbox.exec();
 913                 return;
 914         }
 915
 916         QModelIndex index = selected->currentIndex();
 917         Clip clip = *cliplist_clips->clip(index.row());
 918         QString filename = QFileDialog::getSaveFileName(this,
 919                 "Export multitrack clip", QString(), tr("Matroska video files (*.mkv)"));
 920         if (filename.isNull()) {
 921                 // Cancel.
 922                 return;
 923         }
 924         if (!filename.endsWith(".mkv")) {
 925                 filename += ".mkv";
 926         }
 927         export_multitrack_clip(filename.toStdString(), clip);
 928 }
 929
 930 void MainWindow::export_playlist_clip_interpolated_triggered()
 931 {
 932         QItemSelectionModel *selected = ui->playlist->selectionModel();
 933         if (!selected->hasSelection()) {
 934                 QMessageBox msgbox;
 935                 msgbox.setText("No clip selected in the playlist. Select one and try exporting again.");
 936                 msgbox.exec();
 937                 return;
 938         }
 939
 940         QString filename = QFileDialog::getSaveFileName(this,
 941                 "Export interpolated clip", QString(), tr("Matroska video files (*.mkv)"));
 942         if (filename.isNull()) {
 943                 // Cancel.
 944                 return;
 945         }
 946         if (!filename.endsWith(".mkv")) {
 947                 filename += ".mkv";
 948         }
 949
 950         vector<Clip> clips;
 951         QModelIndexList rows = selected->selectedRows();
 952         for (QModelIndex index : rows) {
 953                 clips.push_back(*playlist_clips->clip(index.row()));
 954         }
 955         export_interpolated_clip(filename.toStdString(), clips);
 956 }
 957
 958 void MainWindow::manual_triggered()
 959 {
 960         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 961                 QMessageBox msgbox;
 962                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 963                 msgbox.exec();
 964         }
 965 }
 966
 967 void MainWindow::about_triggered()
 968 {
 969         AboutDialog("Futatabi", "Multicamera slow motion video server").exec();
 970 }
 971
 972 void MainWindow::undo_triggered()
 973 {
 974         // Finish any deferred action.
 975         if (defer_timeout->isActive()) {
 976                 defer_timeout->stop();
 977                 state_changed(deferred_state);
 978         }
 979
 980         StateProto redo_state;
 981         *redo_state.mutable_clip_list() = cliplist_clips->serialize();
 982         *redo_state.mutable_play_list() = playlist_clips->serialize();
 983         redo_stack.push_back(std::move(redo_state));
 984         ui->redo_action->setEnabled(true);
 985
 986         assert(undo_stack.size() > 1);
 987
 988         // Pop off the current state, which is always at the top of the stack.
 989         undo_stack.pop_back();
 990
 991         StateProto state = undo_stack.back();
 992         ui->undo_action->setEnabled(undo_stack.size() > 1);
 993
 994         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
 995         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
 996
 997         db.store_state(state);
 998 }
 999
1000 void MainWindow::redo_triggered()
1001 {
1002         assert(!redo_stack.empty());
1003
1004         ui->undo_action->setEnabled(true);
1005         ui->redo_action->setEnabled(true);
1006
1007         undo_stack.push_back(std::move(redo_stack.back()));
1008         redo_stack.pop_back();
1009         ui->undo_action->setEnabled(true);
1010         ui->redo_action->setEnabled(!redo_stack.empty());
1011
1012         const StateProto &state = undo_stack.back();
1013         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
1014         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
1015
1016         db.store_state(state);
1017 }
1018
1019 void MainWindow::quality_toggled(int quality, bool checked)
1020 {
1021         if (!checked) {
1022                 return;
1023         }
1024         global_flags.interpolation_quality = quality;
1025         if (quality != 0 &&  // Turning interpolation off is always possible.
1026             quality != flow_initialized_interpolation_quality) {
1027                 QMessageBox msgbox;
1028                 msgbox.setText(QString::fromStdString(
1029                         "The interpolation quality for the main output cannot be changed at runtime, "
1030                         "except being turned completely off; it will take effect for exported files "
1031                         "only until next restart. The live output quality thus remains at " + to_string(flow_initialized_interpolation_quality) + "."));
1032                 msgbox.exec();
1033         }
1034
1035         save_settings();
1036 }
1037
1038 void MainWindow::padding_toggled(double seconds, bool checked)
1039 {
1040         if (!checked) {
1041                 return;
1042         }
1043         global_flags.cue_point_padding_seconds = seconds;
1044         save_settings();
1045 }
1046
1047 void MainWindow::highlight_camera_input(int stream_idx)
1048 {
1049         for (unsigned i = 0; i < num_cameras; ++i) {
1050                 if (unsigned(stream_idx) == i) {
1051                         displays[i].frame->setStyleSheet("background: rgb(0,255,0)");
1052                 } else {
1053                         displays[i].frame->setStyleSheet("");
1054                 }
1055         }
1056 }
1057
1058 void MainWindow::set_output_status(const string &status)
1059 {
1060         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
1061
1062         lock_guard<mutex> lock(queue_status_mu);
1063         queue_status = status;
1064 }
1065
1066 pair<string, string> MainWindow::get_queue_status() const {
1067         lock_guard<mutex> lock(queue_status_mu);
1068         return {queue_status, "text/plain"};
1069 }
1070
1071 void MainWindow::display_frame(unsigned stream_idx, const FrameOnDisk &frame)
1072 {
1073         if (stream_idx >= MAX_STREAMS) {
1074                 fprintf(stderr, "WARNING: Ignoring too-high stream index %u.\n", stream_idx);
1075                 return;
1076         }
1077         if (stream_idx >= num_cameras) {
1078                 post_to_main_thread_and_wait([this, stream_idx]{
1079                         num_cameras = stream_idx + 1;
1080                         change_num_cameras();
1081                 });
1082         }
1083         displays[stream_idx].display->setFrame(stream_idx, frame);
1084 }
1085
1086 template <class Model>
1087 void MainWindow::replace_model(QTableView *view, Model **model, Model *new_model)
1088 {
1089         QItemSelectionModel *old_selection_model = view->selectionModel();
1090         view->setModel(new_model);
1091         delete *model;
1092         delete old_selection_model;
1093         *model = new_model;
1094         connect(new_model, &Model::any_content_changed, this, &MainWindow::content_changed);
1095 }
1096
1097 void MainWindow::start_tally()
1098 {
1099         http_reply = http.get(QNetworkRequest(QString::fromStdString(global_flags.tally_url)));
1100         connect(http_reply, &QNetworkReply::finished, this, &MainWindow::tally_received);
1101 }
1102
1103 void MainWindow::tally_received()
1104 {
1105         unsigned time_to_next_tally_ms;
1106         if (http_reply->error()) {
1107                 fprintf(stderr, "HTTP get of '%s' failed: %s\n", global_flags.tally_url.c_str(),
1108                         http_reply->errorString().toStdString().c_str());
1109                 ui->live_frame->setStyleSheet("");
1110                 time_to_next_tally_ms = 1000;
1111         } else {
1112                 string contents = http_reply->readAll().toStdString();
1113                 ui->live_frame->setStyleSheet(QString::fromStdString("background: " + contents));
1114                 time_to_next_tally_ms = 100;
1115         }
1116         http_reply->deleteLater();
1117         http_reply = nullptr;
1118
1119         QTimer::singleShot(time_to_next_tally_ms, this, &MainWindow::start_tally);
1120 }