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 <QShortcut>
  19 #include <QTimer>
  20 #include <QWheelEvent>
  21 #include <future>
  22 #include <sqlite3.h>
  23 #include <string>
  24 #include <vector>
  25
  26 using namespace std;
  27 using namespace std::placeholders;
  28
  29 MainWindow *global_mainwindow = nullptr;
  30 static ClipList *cliplist_clips;
  31 static PlayList *playlist_clips;
  32
  33 extern int64_t current_pts;
  34
  35 MainWindow::MainWindow()
  36         : ui(new Ui::MainWindow),
  37           db(global_flags.working_directory + "/futatabi.db")
  38 {
  39         global_mainwindow = this;
  40         ui->setupUi(this);
  41
  42         // The menus.
  43         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  44         connect(ui->export_cliplist_clip_multitrack_action, &QAction::triggered, this, &MainWindow::export_cliplist_clip_multitrack_triggered);
  45         connect(ui->export_playlist_clip_interpolated_action, &QAction::triggered, this, &MainWindow::export_playlist_clip_interpolated_triggered);
  46         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
  47         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
  48
  49         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
  50         disk_free_label = new QLabel(this);
  51         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
  52         ui->menuBar->setCornerWidget(disk_free_label);
  53
  54         StateProto state = db.get_state();
  55
  56         cliplist_clips = new ClipList(state.clip_list());
  57         ui->clip_list->setModel(cliplist_clips);
  58         connect(cliplist_clips, &ClipList::any_content_changed, this, &MainWindow::content_changed);
  59
  60         playlist_clips = new PlayList(state.play_list());
  61         ui->playlist->setModel(playlist_clips);
  62         connect(playlist_clips, &PlayList::any_content_changed, this, &MainWindow::content_changed);
  63
  64         // For un-highlighting when we lose focus.
  65         ui->clip_list->installEventFilter(this);
  66
  67         // For scrubbing in the pts columns.
  68         ui->clip_list->viewport()->installEventFilter(this);
  69         ui->playlist->viewport()->installEventFilter(this);
  70
  71         QShortcut *cue_in = new QShortcut(QKeySequence(Qt::Key_A), this);
  72         connect(cue_in, &QShortcut::activated, ui->cue_in_btn, &QPushButton::click);
  73         connect(ui->cue_in_btn, &QPushButton::clicked, this, &MainWindow::cue_in_clicked);
  74
  75         QShortcut *cue_out = new QShortcut(QKeySequence(Qt::Key_S), this);
  76         connect(cue_out, &QShortcut::activated, ui->cue_out_btn, &QPushButton::click);
  77         connect(ui->cue_out_btn, &QPushButton::clicked, this, &MainWindow::cue_out_clicked);
  78
  79         QShortcut *queue = new QShortcut(QKeySequence(Qt::Key_Q), this);
  80         connect(queue, &QShortcut::activated, ui->queue_btn, &QPushButton::click);
  81         connect(ui->queue_btn, &QPushButton::clicked, this, &MainWindow::queue_clicked);
  82
  83         QShortcut *preview = new QShortcut(QKeySequence(Qt::Key_W), this);
  84         connect(preview, &QShortcut::activated, ui->preview_btn, &QPushButton::click);
  85         connect(ui->preview_btn, &QPushButton::clicked, this, &MainWindow::preview_clicked);
  86
  87         QShortcut *play = new QShortcut(QKeySequence(Qt::Key_Space), this);
  88         connect(play, &QShortcut::activated, ui->play_btn, &QPushButton::click);
  89         connect(ui->play_btn, &QPushButton::clicked, this, &MainWindow::play_clicked);
  90
  91         QShortcut *preview_1 = new QShortcut(QKeySequence(Qt::Key_1), this);
  92         connect(preview_1, &QShortcut::activated, ui->preview_1_btn, &QPushButton::click);
  93         connect(ui->input1_display, &JPEGFrameView::clicked, ui->preview_1_btn, &QPushButton::click);
  94         connect(ui->preview_1_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(0); });
  95         ui->input1_display->set_overlay("1");
  96
  97         QShortcut *preview_2 = new QShortcut(QKeySequence(Qt::Key_2), this);
  98         connect(preview_2, &QShortcut::activated, ui->preview_2_btn, &QPushButton::click);
  99         connect(ui->input2_display, &JPEGFrameView::clicked, ui->preview_2_btn, &QPushButton::click);
 100         connect(ui->preview_2_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(1); });
 101         ui->input2_display->set_overlay("2");
 102
 103         QShortcut *preview_3 = new QShortcut(QKeySequence(Qt::Key_3), this);
 104         connect(preview_3, &QShortcut::activated, ui->preview_3_btn, &QPushButton::click);
 105         connect(ui->input3_display, &JPEGFrameView::clicked, ui->preview_3_btn, &QPushButton::click);
 106         connect(ui->preview_3_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(2); });
 107         ui->input3_display->set_overlay("3");
 108
 109         QShortcut *preview_4 = new QShortcut(QKeySequence(Qt::Key_4), this);
 110         connect(preview_4, &QShortcut::activated, ui->preview_4_btn, &QPushButton::click);
 111         connect(ui->input4_display, &JPEGFrameView::clicked, ui->preview_4_btn, &QPushButton::click);
 112         connect(ui->preview_4_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(3); });
 113         ui->input4_display->set_overlay("4");
 114
 115         connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 116
 117         connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
 118         QShortcut *delete_key = new QShortcut(QKeySequence(Qt::Key_Delete), ui->playlist);
 119         connect(delete_key, &QShortcut::activated, [this] {
 120                 if (ui->playlist->hasFocus()) {
 121                         playlist_remove();
 122                 }
 123         });
 124
 125         // TODO: support drag-and-drop.
 126         connect(ui->playlist_move_up_btn, &QPushButton::clicked, [this]{ playlist_move(-1); });
 127         connect(ui->playlist_move_down_btn, &QPushButton::clicked, [this]{ playlist_move(1); });
 128
 129         connect(ui->playlist->selectionModel(), &QItemSelectionModel::selectionChanged,
 130                 this, &MainWindow::playlist_selection_changed);
 131         playlist_selection_changed();  // First time set-up.
 132
 133         preview_player.reset(new Player(ui->preview_display, Player::NO_STREAM_OUTPUT));
 134         live_player.reset(new Player(ui->live_display, Player::HTTPD_STREAM_OUTPUT));
 135         live_player->set_done_callback([this]{
 136                 post_to_main_thread([this]{
 137                         live_player_clip_done();
 138                 });
 139         });
 140         live_player->set_next_clip_callback(bind(&MainWindow::live_player_get_next_clip, this));
 141         live_player->set_progress_callback([this](const map<size_t, double> &progress) {
 142                 post_to_main_thread([this, progress] {
 143                         live_player_clip_progress(progress);
 144                 });
 145         });
 146         set_output_status("paused");
 147
 148         defer_timeout = new QTimer(this);
 149         defer_timeout->setSingleShot(true);
 150         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 151
 152         connect(ui->clip_list->selectionModel(), &QItemSelectionModel::currentChanged,
 153                 this, &MainWindow::clip_list_selection_changed);
 154 }
 155
 156 MainWindow::~MainWindow()
 157 {
 158         // Empty so that we can forward-declare Player in the .h file.
 159 }
 160
 161 void MainWindow::cue_in_clicked()
 162 {
 163         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 164                 cliplist_clips->mutable_back()->pts_in = current_pts;
 165                 return;
 166         }
 167         Clip clip;
 168         clip.pts_in = current_pts;
 169         cliplist_clips->add_clip(clip);
 170         playlist_selection_changed();
 171         ui->clip_list->scrollToBottom();
 172 }
 173
 174 void MainWindow::cue_out_clicked()
 175 {
 176         if (!cliplist_clips->empty()) {
 177                 cliplist_clips->mutable_back()->pts_out = current_pts;
 178                 // TODO: select the row in the clip list?
 179         }
 180 }
 181
 182 void MainWindow::queue_clicked()
 183 {
 184         if (cliplist_clips->empty()) {
 185                 return;
 186         }
 187
 188         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 189         if (!selected->hasSelection()) {
 190                 Clip clip = *cliplist_clips->back();
 191                 clip.stream_idx = 0;
 192                 if (clip.pts_out != -1) {
 193                         playlist_clips->add_clip(clip);
 194                         playlist_selection_changed();
 195                         ui->playlist->scrollToBottom();
 196                 }
 197                 return;
 198         }
 199
 200         QModelIndex index = selected->currentIndex();
 201         Clip clip = *cliplist_clips->clip(index.row());
 202         if (index.column() >= int(ClipList::Column::CAMERA_1) &&
 203             index.column() <= int(ClipList::Column::CAMERA_4)) {
 204                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 205         } else {
 206                 clip.stream_idx = ui->preview_display->get_stream_idx();
 207         }
 208
 209         if (clip.pts_out != -1) {
 210                 playlist_clips->add_clip(clip);
 211                 playlist_selection_changed();
 212                 ui->playlist->scrollToBottom();
 213                 if (!ui->playlist->selectionModel()->hasSelection()) {
 214                         // TODO: Figure out why this doesn't always seem to actually select the row.
 215                         QModelIndex bottom = playlist_clips->index(playlist_clips->size() - 1, 0);
 216                         ui->playlist->setCurrentIndex(bottom);
 217                 }
 218         }
 219 }
 220
 221 void MainWindow::preview_clicked()
 222 {
 223         if (ui->playlist->hasFocus()) {
 224                 // Allow the playlist as preview iff it has focus and something is selected.
 225                 QItemSelectionModel *selected = ui->playlist->selectionModel();
 226                 if (selected->hasSelection()) {
 227                         QModelIndex index = selected->currentIndex();
 228                         const Clip &clip = *playlist_clips->clip(index.row());
 229                         preview_player->play_clip(clip, index.row(), clip.stream_idx);
 230                         return;
 231                 }
 232         }
 233
 234         if (cliplist_clips->empty())
 235                 return;
 236
 237         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 238         if (!selected->hasSelection()) {
 239                 preview_player->play_clip(*cliplist_clips->back(), cliplist_clips->size() - 1, 0);
 240                 return;
 241         }
 242
 243         QModelIndex index = selected->currentIndex();
 244         unsigned stream_idx;
 245         if (index.column() >= int(ClipList::Column::CAMERA_1) &&
 246             index.column() <= int(ClipList::Column::CAMERA_4)) {
 247                 stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 248         } else {
 249                 stream_idx = ui->preview_display->get_stream_idx();
 250         }
 251         preview_player->play_clip(*cliplist_clips->clip(index.row()), index.row(), stream_idx);
 252 }
 253
 254 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 255 {
 256         preview_player->override_angle(stream_idx);
 257
 258         // Change the selection if we were previewing a clip from the clip list.
 259         // (The only other thing we could be showing is a pts scrub, and if so,
 260         // that would be selected.)
 261         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 262         if (selected->hasSelection()) {
 263                 QModelIndex cell = selected->selectedIndexes()[0];
 264                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 265                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 266         }
 267 }
 268
 269 void MainWindow::playlist_duplicate()
 270 {
 271         QItemSelectionModel *selected = ui->playlist->selectionModel();
 272         if (!selected->hasSelection()) {
 273                 // Should have been grayed out, but OK.
 274                 return;
 275         }
 276         QModelIndexList rows = selected->selectedRows();
 277         int first = rows.front().row(), last = rows.back().row();
 278         playlist_clips->duplicate_clips(first, last);
 279         playlist_selection_changed();
 280 }
 281
 282 void MainWindow::playlist_remove()
 283 {
 284         QItemSelectionModel *selected = ui->playlist->selectionModel();
 285         if (!selected->hasSelection()) {
 286                 // Should have been grayed out, but OK.
 287                 return;
 288         }
 289         QModelIndexList rows = selected->selectedRows();
 290         int first = rows.front().row(), last = rows.back().row();
 291         playlist_clips->erase_clips(first, last);
 292
 293         // TODO: select the next one in the list?
 294
 295         playlist_selection_changed();
 296 }
 297
 298 void MainWindow::playlist_move(int delta)
 299 {
 300         QItemSelectionModel *selected = ui->playlist->selectionModel();
 301         if (!selected->hasSelection()) {
 302                 // Should have been grayed out, but OK.
 303                 return;
 304         }
 305
 306         QModelIndexList rows = selected->selectedRows();
 307         int first = rows.front().row(), last = rows.back().row();
 308         if ((delta == -1 && first == 0) ||
 309             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 310                 // Should have been grayed out, but OK.
 311                 return;
 312         }
 313
 314         playlist_clips->move_clips(first, last, delta);
 315         playlist_selection_changed();
 316 }
 317
 318 void MainWindow::defer_timer_expired()
 319 {
 320         state_changed(deferred_state);
 321 }
 322
 323 void MainWindow::content_changed()
 324 {
 325         if (defer_timeout->isActive() &&
 326             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 327                 // There's some deferred event waiting, but this event is unrelated.
 328                 // So it's time to short-circuit that timer and do the work it wanted to do.
 329                 defer_timeout->stop();
 330                 state_changed(deferred_state);
 331         }
 332         StateProto state;
 333         *state.mutable_clip_list() = cliplist_clips->serialize();
 334         *state.mutable_play_list() = playlist_clips->serialize();
 335         if (currently_deferring_model_changes) {
 336                 deferred_change_id = current_change_id;
 337                 deferred_state = std::move(state);
 338                 defer_timeout->start(200);
 339                 return;
 340         }
 341         state_changed(state);
 342 }
 343
 344 void MainWindow::state_changed(const StateProto &state)
 345 {
 346         db.store_state(state);
 347 }
 348
 349 void MainWindow::play_clicked()
 350 {
 351         if (playlist_clips->empty())
 352                 return;
 353
 354         QItemSelectionModel *selected = ui->playlist->selectionModel();
 355         int row;
 356         if (!selected->hasSelection()) {
 357                 row = 0;
 358         } else {
 359                 row = selected->selectedRows(0)[0].row();
 360         }
 361
 362         const Clip &clip = *playlist_clips->clip(row);
 363         live_player->play_clip(clip, row, clip.stream_idx);
 364         playlist_clips->set_progress({{ row, 0.0f }});
 365         playlist_clips->set_currently_playing(row, 0.0f);
 366         playlist_selection_changed();
 367 }
 368
 369 void MainWindow::live_player_clip_done()
 370 {
 371         int row = playlist_clips->get_currently_playing();
 372         if (row == -1 || row == int(playlist_clips->size()) - 1) {
 373                 set_output_status("paused");
 374                 playlist_clips->set_progress({});
 375                 playlist_clips->set_currently_playing(-1, 0.0f);
 376         } else {
 377                 playlist_clips->set_progress({{ row + 1, 0.0f }});
 378                 playlist_clips->set_currently_playing(row + 1, 0.0f);
 379         }
 380 }
 381
 382 pair<Clip, size_t> MainWindow::live_player_get_next_clip()
 383 {
 384         // playlist_clips can only be accessed on the main thread.
 385         // Hopefully, we won't have to wait too long for this to come back.
 386         //
 387         // TODO: If MainWindow is in the process of being destroyed and waiting
 388         // for Player to shut down, we could have a deadlock here.
 389         promise<pair<Clip, size_t>> clip_promise;
 390         future<pair<Clip, size_t>> clip = clip_promise.get_future();
 391         post_to_main_thread([this, &clip_promise] {
 392                 int row = playlist_clips->get_currently_playing();
 393                 if (row != -1 && row < int(playlist_clips->size()) - 1) {
 394                         clip_promise.set_value(make_pair(*playlist_clips->clip(row + 1), row + 1));
 395                 } else {
 396                         clip_promise.set_value(make_pair(Clip(), 0));
 397                 }
 398         });
 399         return clip.get();
 400 }
 401
 402 static string format_duration(double t)
 403 {
 404         int t_ms = lrint(t * 1e3);
 405
 406         int ms = t_ms % 1000;
 407         t_ms /= 1000;
 408         int s = t_ms % 60;
 409         t_ms /= 60;
 410         int m = t_ms;
 411
 412         char buf[256];
 413         snprintf(buf, sizeof(buf), "%d:%02d.%03d", m, s, ms);
 414         return buf;
 415 }
 416
 417 void MainWindow::live_player_clip_progress(const map<size_t, double> &progress)
 418 {
 419         playlist_clips->set_progress(progress);
 420
 421         // Look at the last clip and then start counting from there.
 422         assert(!progress.empty());
 423         auto last_it = progress.end();
 424         --last_it;
 425         double remaining = 0.0;
 426         double last_fade_time_seconds = 0.0;
 427         for (size_t row = last_it->first; row < playlist_clips->size(); ++row) {
 428                 const Clip clip = *playlist_clips->clip(row);
 429                 double clip_length = double(clip.pts_out - clip.pts_in) / TIMEBASE / 0.5;  // FIXME: stop hardcoding speed.
 430                 if (row == last_it->first) {
 431                         // A clip we're playing: Subtract the part we've already played.
 432                         remaining = clip_length * (1.0 - last_it->second);
 433                 } else {
 434                         // A clip we haven't played yet: Subtract the part that's overlapping
 435                         // with a previous clip (due to fade).
 436                         remaining += max(clip_length - last_fade_time_seconds, 0.0);
 437                 }
 438                 last_fade_time_seconds = min(clip_length, clip.fade_time_seconds);
 439         }
 440         set_output_status(format_duration(remaining) + " left");
 441 }
 442
 443 void MainWindow::resizeEvent(QResizeEvent *event)
 444 {
 445         QMainWindow::resizeEvent(event);
 446
 447         // Ask for a relayout, but only after the event loop is done doing relayout
 448         // on everything else.
 449         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 450 }
 451
 452 void MainWindow::relayout()
 453 {
 454         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 455         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 456 }
 457
 458 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
 459 {
 460         pts = std::max<int64_t>(pts, 0);
 461         if (clip->pts_out == -1) {
 462                 pts = std::min(pts, current_pts);
 463         } else {
 464                 pts = std::min(pts, clip->pts_out);
 465         }
 466         clip->pts_in = pts;
 467 }
 468
 469 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 470 {
 471         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 472         constexpr int scrub_sensitivity = 100;  // pts units per pixel.
 473         constexpr int wheel_sensitivity = 100;  // pts units per degree.
 474         constexpr int camera_degrees_per_pixel = 15;  // One click of most mice.
 475
 476         unsigned stream_idx = ui->preview_display->get_stream_idx();
 477
 478         if (watched == ui->clip_list) {
 479                 if (event->type() == QEvent::FocusOut) {
 480                         highlight_camera_input(-1);
 481                 }
 482                 return false;
 483         }
 484
 485         if (event->type() != QEvent::Wheel) {
 486                 last_mousewheel_camera_row = -1;
 487         }
 488
 489         if (event->type() == QEvent::MouseButtonPress) {
 490                 QMouseEvent *mouse = (QMouseEvent *)event;
 491
 492                 QTableView *destination;
 493                 ScrubType type;
 494
 495                 if (watched == ui->clip_list->viewport()) {
 496                         destination = ui->clip_list;
 497                         type = SCRUBBING_CLIP_LIST;
 498                 } else if (watched == ui->playlist->viewport()) {
 499                         destination = ui->playlist;
 500                         type = SCRUBBING_PLAYLIST;
 501                 } else {
 502                         return false;
 503                 }
 504                 int column = destination->columnAt(mouse->x());
 505                 int row = destination->rowAt(mouse->y());
 506                 if (column == -1 || row == -1)
 507                         return false;
 508
 509                 if (type == SCRUBBING_CLIP_LIST) {
 510                         if (ClipList::Column(column) == ClipList::Column::IN) {
 511                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 512                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 513                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 514                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 515                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 516                         } else {
 517                                 return false;
 518                         }
 519                 } else {
 520                         if (PlayList::Column(column) == PlayList::Column::IN) {
 521                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 522                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 523                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 524                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 525                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 526                         } else {
 527                                 return false;
 528                         }
 529                 }
 530
 531                 scrubbing = true;
 532                 scrub_row = row;
 533                 scrub_column = column;
 534                 scrub_x_origin = mouse->x();
 535                 scrub_type = type;
 536         } else if (event->type() == QEvent::MouseMove) {
 537                 if (scrubbing) {
 538                         QMouseEvent *mouse = (QMouseEvent *)event;
 539                         int offset = mouse->x() - scrub_x_origin;
 540                         int adjusted_offset;
 541                         if (offset >= dead_zone_pixels) {
 542                                 adjusted_offset = offset - dead_zone_pixels;
 543                         } else if (offset < -dead_zone_pixels) {
 544                                 adjusted_offset = offset + dead_zone_pixels;
 545                         } else {
 546                                 adjusted_offset = 0;
 547                         }
 548
 549                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 550                         currently_deferring_model_changes = true;
 551                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 552                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 553                                 if (scrub_column == int(ClipList::Column::IN)) {
 554                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 555                                         set_pts_in(pts, current_pts, clip);
 556                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 557                                 } else {
 558                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 559                                         pts = std::max(pts, clip->pts_in);
 560                                         pts = std::min(pts, current_pts);
 561                                         clip->pts_out = pts;
 562                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 563                                 }
 564                         } else {
 565                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 566                                 if (scrub_column == int(PlayList::Column::IN)) {
 567                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 568                                         set_pts_in(pts, current_pts, clip);
 569                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 570                                 } else {
 571                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 572                                         pts = std::max(pts, clip->pts_in);
 573                                         pts = std::min(pts, current_pts);
 574                                         clip->pts_out = pts;
 575                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 576                                 }
 577                         }
 578                         currently_deferring_model_changes = false;
 579
 580                         return true;  // Don't use this mouse movement for selecting things.
 581                 }
 582         } else if (event->type() == QEvent::Wheel) {
 583                 QWheelEvent *wheel = (QWheelEvent *)event;
 584
 585                 QTableView *destination;
 586                 int in_column, out_column, camera_column;
 587                 if (watched == ui->clip_list->viewport()) {
 588                         destination = ui->clip_list;
 589                         in_column = int(ClipList::Column::IN);
 590                         out_column = int(ClipList::Column::OUT);
 591                         camera_column = -1;
 592                         last_mousewheel_camera_row = -1;
 593                 } else if (watched == ui->playlist->viewport()) {
 594                         destination = ui->playlist;
 595                         in_column = int(PlayList::Column::IN);
 596                         out_column = int(PlayList::Column::OUT);
 597                         camera_column = int(PlayList::Column::CAMERA);
 598                 } else {
 599                         last_mousewheel_camera_row = -1;
 600                         return false;
 601                 }
 602                 int column = destination->columnAt(wheel->x());
 603                 int row = destination->rowAt(wheel->y());
 604                 if (column == -1 || row == -1) return false;
 605
 606                 // Only adjust pts with the wheel if the given row is selected.
 607                 if (!destination->hasFocus() ||
 608                     row != destination->selectionModel()->currentIndex().row()) {
 609                         return false;
 610                 }
 611
 612                 currently_deferring_model_changes = true;
 613                 {
 614                         current_change_id = (watched == ui->clip_list->viewport()) ? "cliplist:" : "playlist:";
 615                         ClipProxy clip = (watched == ui->clip_list->viewport()) ?
 616                                 cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 617                         if (watched == ui->playlist->viewport()) {
 618                                 stream_idx = clip->stream_idx;
 619                         }
 620
 621                         if (column != camera_column) {
 622                                 last_mousewheel_camera_row = -1;
 623                         }
 624                         if (column == in_column) {
 625                                 current_change_id += "in:" + to_string(row);
 626                                 int64_t pts = clip->pts_in + wheel->angleDelta().y() * wheel_sensitivity;
 627                                 set_pts_in(pts, current_pts, clip);
 628                                 preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 629                         } else if (column == out_column) {
 630                                 current_change_id += "out:" + to_string(row);
 631                                 int64_t pts = clip->pts_out + wheel->angleDelta().y() * wheel_sensitivity;
 632                                 pts = std::max(pts, clip->pts_in);
 633                                 pts = std::min(pts, current_pts);
 634                                 clip->pts_out = pts;
 635                                 preview_single_frame(pts, stream_idx, LAST_BEFORE);
 636                         } else if (column == camera_column) {
 637                                 current_change_id += "camera:" + to_string(row);
 638                                 int angle_degrees = wheel->angleDelta().y();
 639                                 if (last_mousewheel_camera_row == row) {
 640                                         angle_degrees += leftover_angle_degrees;
 641                                 }
 642
 643                                 int stream_idx = clip->stream_idx + angle_degrees / camera_degrees_per_pixel;
 644                                 stream_idx = std::max(stream_idx, 0);
 645                                 stream_idx = std::min(stream_idx, NUM_CAMERAS - 1);
 646                                 clip->stream_idx = stream_idx;
 647
 648                                 last_mousewheel_camera_row = row;
 649                                 leftover_angle_degrees = angle_degrees % camera_degrees_per_pixel;
 650
 651                                 // Don't update the live view, that's rarely what the operator wants.
 652                         }
 653                 }
 654                 currently_deferring_model_changes = false;
 655                 return true;  // Don't scroll.
 656         } else if (event->type() == QEvent::MouseButtonRelease) {
 657                 scrubbing = false;
 658         }
 659         return false;
 660 }
 661
 662 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 663 {
 664         if (rounding == LAST_BEFORE) {
 665                 lock_guard<mutex> lock(frame_mu);
 666                 if (frames[stream_idx].empty())
 667                         return;
 668                 auto it = find_last_frame_before(frames[stream_idx], pts);
 669                 if (it != frames[stream_idx].end()) {
 670                         pts = it->pts;
 671                 }
 672         } else {
 673                 assert(rounding == FIRST_AT_OR_AFTER);
 674                 lock_guard<mutex> lock(frame_mu);
 675                 if (frames[stream_idx].empty())
 676                         return;
 677                 auto it = find_first_frame_at_or_after(frames[stream_idx], pts);
 678                 if (it != frames[stream_idx].end()) {
 679                         pts = it->pts;
 680                 }
 681         }
 682
 683         Clip fake_clip;
 684         fake_clip.pts_in = pts;
 685         fake_clip.pts_out = pts + 1;
 686         preview_player->play_clip(fake_clip, 0, stream_idx);
 687 }
 688
 689 void MainWindow::playlist_selection_changed()
 690 {
 691         QItemSelectionModel *selected = ui->playlist->selectionModel();
 692         bool any_selected = selected->hasSelection();
 693         ui->playlist_duplicate_btn->setEnabled(any_selected);
 694         ui->playlist_remove_btn->setEnabled(any_selected);
 695         ui->playlist_move_up_btn->setEnabled(
 696                 any_selected && selected->selectedRows().front().row() > 0);
 697         ui->playlist_move_down_btn->setEnabled(
 698                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 699         ui->play_btn->setEnabled(!playlist_clips->empty());
 700
 701         if (!any_selected) {
 702                 set_output_status("paused");
 703         } else {
 704                 double remaining = 0.0;
 705                 for (int row = selected->selectedRows().front().row(); row < int(playlist_clips->size()); ++row) {
 706                         const Clip clip = *playlist_clips->clip(row);
 707                         remaining += double(clip.pts_out - clip.pts_in) / TIMEBASE / 0.5;  // FIXME: stop hardcoding speed.
 708                 }
 709                 set_output_status(format_duration(remaining) + " ready");
 710         }
 711 }
 712
 713 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &)
 714 {
 715         int camera_selected = -1;
 716         if (current.column() >= int(ClipList::Column::CAMERA_1) &&
 717             current.column() <= int(ClipList::Column::CAMERA_4)) {
 718                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 719         }
 720         highlight_camera_input(camera_selected);
 721 }
 722
 723 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 724 {
 725         char time_str[256];
 726         if (estimated_seconds_left < 60.0) {
 727                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 728         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 729                 int s = lrintf(estimated_seconds_left);
 730                 int m = s / 60;
 731                 s %= 60;
 732                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 733         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 734                 int m = lrintf(estimated_seconds_left / 60.0);
 735                 snprintf(time_str, sizeof(time_str), "%dm", m);
 736         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 737                 int m = lrintf(estimated_seconds_left / 60.0);
 738                 int h = m / 60;
 739                 m %= 60;
 740                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 741         } else {  // More than ten hours: Xh.
 742                 int h = lrintf(estimated_seconds_left / 3600.0);
 743                 snprintf(time_str, sizeof(time_str), "%dh", h);
 744         }
 745         char buf[256];
 746         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 747
 748         std::string label = buf;
 749
 750         post_to_main_thread([this, label] {
 751                 disk_free_label->setText(QString::fromStdString(label));
 752                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 753         });
 754 }
 755
 756 void MainWindow::exit_triggered()
 757 {
 758         close();
 759 }
 760
 761 void MainWindow::export_cliplist_clip_multitrack_triggered()
 762 {
 763         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 764         if (!selected->hasSelection()) {
 765                 QMessageBox msgbox;
 766                 msgbox.setText("No clip selected in the clip list. Select one and try exporting again.");
 767                 msgbox.exec();
 768                 return;
 769         }
 770
 771         QModelIndex index = selected->currentIndex();
 772         Clip clip = *cliplist_clips->clip(index.row());
 773         QString filename = QFileDialog::getSaveFileName(this,
 774                 "Export multitrack clip", QString(), tr("Matroska video files (*.mkv)"));
 775         if (filename.isNull()) {
 776                 // Cancel.
 777                 return;
 778         }
 779         if (!filename.endsWith(".mkv")) {
 780                 filename += ".mkv";
 781         }
 782         export_multitrack_clip(filename.toStdString(), clip);
 783 }
 784
 785 void MainWindow::export_playlist_clip_interpolated_triggered()
 786 {
 787         QItemSelectionModel *selected = ui->playlist->selectionModel();
 788         if (!selected->hasSelection()) {
 789                 QMessageBox msgbox;
 790                 msgbox.setText("No clip selected in the playlist. Select one and try exporting again.");
 791                 msgbox.exec();
 792                 return;
 793         }
 794
 795         QModelIndex index = selected->currentIndex();
 796         Clip clip = *playlist_clips->clip(index.row());
 797         QString filename = QFileDialog::getSaveFileName(this,
 798                 "Export interpolated clip", QString(), tr("Matroska video files (*.mkv)"));
 799         if (filename.isNull()) {
 800                 // Cancel.
 801                 return;
 802         }
 803         if (!filename.endsWith(".mkv")) {
 804                 filename += ".mkv";
 805         }
 806         export_interpolated_clip(filename.toStdString(), clip);
 807 }
 808
 809 void MainWindow::manual_triggered()
 810 {
 811         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 812                 QMessageBox msgbox;
 813                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 814                 msgbox.exec();
 815         }
 816 }
 817
 818 void MainWindow::about_triggered()
 819 {
 820         AboutDialog("Futatabi", "Multicamera slow motion video server").exec();
 821 }
 822
 823 void MainWindow::highlight_camera_input(int stream_idx)
 824 {
 825         if (stream_idx == 0) {
 826                 ui->input1_frame->setStyleSheet("background: rgb(0,255,0)");
 827         } else {
 828                 ui->input1_frame->setStyleSheet("");
 829         }
 830         if (stream_idx == 1) {
 831                 ui->input2_frame->setStyleSheet("background: rgb(0,255,0)");
 832         } else {
 833                 ui->input2_frame->setStyleSheet("");
 834         }
 835         if (stream_idx == 2) {
 836                 ui->input3_frame->setStyleSheet("background: rgb(0,255,0)");
 837         } else {
 838                 ui->input3_frame->setStyleSheet("");
 839         }
 840         if (stream_idx == 3) {
 841                 ui->input4_frame->setStyleSheet("background: rgb(0,255,0)");
 842         } else {
 843                 ui->input4_frame->setStyleSheet("");
 844         }
 845 }
 846
 847 void MainWindow::set_output_status(const string &status)
 848 {
 849         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
 850
 851         lock_guard<mutex> lock(queue_status_mu);
 852         queue_status = status;
 853 }
 854
 855 pair<string, string> MainWindow::get_queue_status() const {
 856         lock_guard<mutex> lock(queue_status_mu);
 857         return {queue_status, "text/plain"};
 858 }