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

   1 #include "mainwindow.h"
   2
   3 #include "clip_list.h"
   4 #include "disk_space_estimator.h"
   5 #include "player.h"
   6 #include "post_to_main_thread.h"
   7 #include "timebase.h"
   8 #include "ui_mainwindow.h"
   9
  10 #include <QMouseEvent>
  11 #include <QShortcut>
  12 #include <QTimer>
  13 #include <QWheelEvent>
  14 #include <future>
  15 #include <sqlite3.h>
  16 #include <string>
  17 #include <vector>
  18
  19 using namespace std;
  20 using namespace std::placeholders;
  21
  22 MainWindow *global_mainwindow = nullptr;
  23 static ClipList *cliplist_clips;
  24 static PlayList *playlist_clips;
  25
  26 extern int64_t current_pts;
  27 extern mutex frame_mu;
  28 extern vector<int64_t> frames[MAX_STREAMS];
  29
  30 MainWindow::MainWindow()
  31         : ui(new Ui::MainWindow),
  32           db("futatabi.db")
  33 {
  34         global_mainwindow = this;
  35         ui->setupUi(this);
  36
  37         // The menus.
  38         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  39
  40         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
  41         disk_free_label = new QLabel(this);
  42         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
  43         ui->menuBar->setCornerWidget(disk_free_label);
  44
  45         StateProto state = db.get_state();
  46
  47         cliplist_clips = new ClipList(state.clip_list());
  48         ui->clip_list->setModel(cliplist_clips);
  49         connect(cliplist_clips, &ClipList::any_content_changed, this, &MainWindow::content_changed);
  50
  51         playlist_clips = new PlayList(state.play_list());
  52         ui->playlist->setModel(playlist_clips);
  53         connect(playlist_clips, &PlayList::any_content_changed, this, &MainWindow::content_changed);
  54
  55         // For un-highlighting when we lose focus.
  56         ui->clip_list->installEventFilter(this);
  57
  58         // For scrubbing in the pts columns.
  59         ui->clip_list->viewport()->installEventFilter(this);
  60         ui->playlist->viewport()->installEventFilter(this);
  61
  62         QShortcut *cue_in = new QShortcut(QKeySequence(Qt::Key_A), this);
  63         connect(cue_in, &QShortcut::activated, ui->cue_in_btn, &QPushButton::click);
  64         connect(ui->cue_in_btn, &QPushButton::clicked, this, &MainWindow::cue_in_clicked);
  65
  66         QShortcut *cue_out = new QShortcut(QKeySequence(Qt::Key_S), this);
  67         connect(cue_out, &QShortcut::activated, ui->cue_out_btn, &QPushButton::click);
  68         connect(ui->cue_out_btn, &QPushButton::clicked, this, &MainWindow::cue_out_clicked);
  69
  70         QShortcut *queue = new QShortcut(QKeySequence(Qt::Key_Q), this);
  71         connect(queue, &QShortcut::activated, ui->queue_btn, &QPushButton::click);
  72         connect(ui->queue_btn, &QPushButton::clicked, this, &MainWindow::queue_clicked);
  73
  74         QShortcut *preview = new QShortcut(QKeySequence(Qt::Key_W), this);
  75         connect(preview, &QShortcut::activated, ui->preview_btn, &QPushButton::click);
  76         connect(ui->preview_btn, &QPushButton::clicked, this, &MainWindow::preview_clicked);
  77
  78         QShortcut *play = new QShortcut(QKeySequence(Qt::Key_Space), this);
  79         connect(play, &QShortcut::activated, ui->play_btn, &QPushButton::click);
  80         connect(ui->play_btn, &QPushButton::clicked, this, &MainWindow::play_clicked);
  81
  82         QShortcut *preview_1 = new QShortcut(QKeySequence(Qt::Key_1), this);
  83         connect(preview_1, &QShortcut::activated, ui->preview_1_btn, &QPushButton::click);
  84         connect(ui->input1_display, &JPEGFrameView::clicked, ui->preview_1_btn, &QPushButton::click);
  85         connect(ui->preview_1_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(0); });
  86         ui->input1_display->set_overlay("1");
  87
  88         QShortcut *preview_2 = new QShortcut(QKeySequence(Qt::Key_2), this);
  89         connect(preview_2, &QShortcut::activated, ui->preview_2_btn, &QPushButton::click);
  90         connect(ui->input2_display, &JPEGFrameView::clicked, ui->preview_2_btn, &QPushButton::click);
  91         connect(ui->preview_2_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(1); });
  92         ui->input2_display->set_overlay("2");
  93
  94         QShortcut *preview_3 = new QShortcut(QKeySequence(Qt::Key_3), this);
  95         connect(preview_3, &QShortcut::activated, ui->preview_3_btn, &QPushButton::click);
  96         connect(ui->input3_display, &JPEGFrameView::clicked, ui->preview_3_btn, &QPushButton::click);
  97         connect(ui->preview_3_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(2); });
  98         ui->input3_display->set_overlay("3");
  99
 100         QShortcut *preview_4 = new QShortcut(QKeySequence(Qt::Key_4), this);
 101         connect(preview_4, &QShortcut::activated, ui->preview_4_btn, &QPushButton::click);
 102         connect(ui->input4_display, &JPEGFrameView::clicked, ui->preview_4_btn, &QPushButton::click);
 103         connect(ui->preview_4_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(3); });
 104         ui->input4_display->set_overlay("4");
 105
 106         connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 107
 108         connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
 109         QShortcut *delete_key = new QShortcut(QKeySequence(Qt::Key_Delete), ui->playlist);
 110         connect(delete_key, &QShortcut::activated, [this] {
 111                 if (ui->playlist->hasFocus()) {
 112                         playlist_remove();
 113                 }
 114         });
 115
 116         // TODO: support drag-and-drop.
 117         connect(ui->playlist_move_up_btn, &QPushButton::clicked, [this]{ playlist_move(-1); });
 118         connect(ui->playlist_move_down_btn, &QPushButton::clicked, [this]{ playlist_move(1); });
 119
 120         connect(ui->playlist->selectionModel(), &QItemSelectionModel::selectionChanged,
 121                 this, &MainWindow::playlist_selection_changed);
 122         playlist_selection_changed();  // First time set-up.
 123
 124         preview_player = new Player(ui->preview_display, /*also_output_to_stream=*/false);
 125         live_player = new Player(ui->live_display, /*also_output_to_stream=*/true);
 126         live_player->set_done_callback([this]{
 127                 post_to_main_thread([this]{
 128                         live_player_clip_done();
 129                 });
 130         });
 131         live_player->set_next_clip_callback(bind(&MainWindow::live_player_get_next_clip, this));
 132         live_player->set_progress_callback([this](double played_this_clip, double total_length) {
 133                 post_to_main_thread([this, played_this_clip, total_length] {
 134                         live_player_clip_progress(played_this_clip, total_length);
 135                 });
 136         });
 137
 138         defer_timeout = new QTimer(this);
 139         defer_timeout->setSingleShot(true);
 140         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 141
 142         connect(ui->clip_list->selectionModel(), &QItemSelectionModel::currentChanged,
 143                 this, &MainWindow::clip_list_selection_changed);
 144 }
 145
 146 void MainWindow::cue_in_clicked()
 147 {
 148         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 149                 cliplist_clips->mutable_back()->pts_in = current_pts;
 150                 return;
 151         }
 152         Clip clip;
 153         clip.pts_in = current_pts;
 154         cliplist_clips->add_clip(clip);
 155         playlist_selection_changed();
 156 }
 157
 158 void MainWindow::cue_out_clicked()
 159 {
 160         if (!cliplist_clips->empty()) {
 161                 cliplist_clips->mutable_back()->pts_out = current_pts;
 162                 // TODO: select the row in the clip list?
 163         }
 164 }
 165
 166 void MainWindow::queue_clicked()
 167 {
 168         if (cliplist_clips->empty()) {
 169                 return;
 170         }
 171
 172         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 173         if (!selected->hasSelection()) {
 174                 Clip clip = *cliplist_clips->back();
 175                 clip.stream_idx = 0;
 176                 if (clip.pts_out != -1) {
 177                         playlist_clips->add_clip(clip);
 178                         playlist_selection_changed();
 179                 }
 180                 return;
 181         }
 182
 183         QModelIndex index = selected->currentIndex();
 184         Clip clip = *cliplist_clips->clip(index.row());
 185         if (index.column() >= int(ClipList::Column::CAMERA_1) &&
 186             index.column() <= int(ClipList::Column::CAMERA_4)) {
 187                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 188         } else {
 189                 clip.stream_idx = ui->preview_display->get_stream_idx();
 190         }
 191
 192         if (clip.pts_out != -1) {
 193                 playlist_clips->add_clip(clip);
 194                 playlist_selection_changed();
 195         }
 196 }
 197
 198 void MainWindow::preview_clicked()
 199 {
 200         if (cliplist_clips->empty())
 201                 return;
 202
 203         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 204         if (!selected->hasSelection()) {
 205                 preview_player->play_clip(*cliplist_clips->back(), 0);
 206                 return;
 207         }
 208
 209         QModelIndex index = selected->currentIndex();
 210         unsigned stream_idx;
 211         if (index.column() >= int(ClipList::Column::CAMERA_1) &&
 212             index.column() <= int(ClipList::Column::CAMERA_4)) {
 213                 stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 214         } else {
 215                 stream_idx = ui->preview_display->get_stream_idx();
 216         }
 217         preview_player->play_clip(*cliplist_clips->clip(index.row()), stream_idx);
 218 }
 219
 220 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 221 {
 222         preview_player->override_angle(stream_idx);
 223
 224         // Change the selection if we were previewing a clip from the clip list.
 225         // (The only other thing we could be showing is a pts scrub, and if so,
 226         // that would be selected.)
 227         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 228         if (selected->hasSelection()) {
 229                 QModelIndex cell = selected->selectedIndexes()[0];
 230                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 231                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 232         }
 233 }
 234
 235 void MainWindow::playlist_duplicate()
 236 {
 237         QItemSelectionModel *selected = ui->playlist->selectionModel();
 238         if (!selected->hasSelection()) {
 239                 // Should have been grayed out, but OK.
 240                 return;
 241         }
 242         QModelIndexList rows = selected->selectedRows();
 243         int first = rows.front().row(), last = rows.back().row();
 244         playlist_clips->duplicate_clips(first, last);
 245         playlist_selection_changed();
 246 }
 247
 248 void MainWindow::playlist_remove()
 249 {
 250         QItemSelectionModel *selected = ui->playlist->selectionModel();
 251         if (!selected->hasSelection()) {
 252                 // Should have been grayed out, but OK.
 253                 return;
 254         }
 255         QModelIndexList rows = selected->selectedRows();
 256         int first = rows.front().row(), last = rows.back().row();
 257         playlist_clips->erase_clips(first, last);
 258
 259         // TODO: select the next one in the list?
 260
 261         playlist_selection_changed();
 262 }
 263
 264 void MainWindow::playlist_move(int delta)
 265 {
 266         QItemSelectionModel *selected = ui->playlist->selectionModel();
 267         if (!selected->hasSelection()) {
 268                 // Should have been grayed out, but OK.
 269                 return;
 270         }
 271
 272         QModelIndexList rows = selected->selectedRows();
 273         int first = rows.front().row(), last = rows.back().row();
 274         if ((delta == -1 && first == 0) ||
 275             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 276                 // Should have been grayed out, but OK.
 277                 return;
 278         }
 279
 280         playlist_clips->move_clips(first, last, delta);
 281         playlist_selection_changed();
 282 }
 283
 284 void MainWindow::defer_timer_expired()
 285 {
 286         state_changed(deferred_state);
 287 }
 288
 289 void MainWindow::content_changed()
 290 {
 291         if (defer_timeout->isActive() &&
 292             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 293                 // There's some deferred event waiting, but this event is unrelated.
 294                 // So it's time to short-circuit that timer and do the work it wanted to do.
 295                 defer_timeout->stop();
 296                 state_changed(deferred_state);
 297         }
 298         StateProto state;
 299         *state.mutable_clip_list() = cliplist_clips->serialize();
 300         *state.mutable_play_list() = playlist_clips->serialize();
 301         if (currently_deferring_model_changes) {
 302                 deferred_change_id = current_change_id;
 303                 deferred_state = std::move(state);
 304                 defer_timeout->start(200);
 305                 return;
 306         }
 307         state_changed(state);
 308 }
 309
 310 void MainWindow::state_changed(const StateProto &state)
 311 {
 312         db.store_state(state);
 313 }
 314
 315 void MainWindow::play_clicked()
 316 {
 317         if (playlist_clips->empty())
 318                 return;
 319
 320         QItemSelectionModel *selected = ui->playlist->selectionModel();
 321         int row;
 322         if (!selected->hasSelection()) {
 323                 row = 0;
 324         } else {
 325                 row = selected->selectedRows(0)[0].row();
 326         }
 327
 328         const Clip &clip = *playlist_clips->clip(row);
 329         live_player->play_clip(clip, clip.stream_idx);
 330         playlist_clips->set_currently_playing(row, 0.0f);
 331         playlist_selection_changed();
 332 }
 333
 334 void MainWindow::live_player_clip_done()
 335 {
 336         int row = playlist_clips->get_currently_playing();
 337         if (row == -1 || row == int(playlist_clips->size()) - 1) {
 338                 ui->live_label->setText("Current output (paused)");
 339                 playlist_clips->set_currently_playing(-1, 0.0f);
 340         } else {
 341                 playlist_clips->set_currently_playing(row + 1, 0.0f);
 342         }
 343 }
 344
 345 Clip MainWindow::live_player_get_next_clip()
 346 {
 347         // playlist_clips can only be accessed on the main thread.
 348         // Hopefully, we won't have to wait too long for this to come back.
 349         promise<Clip> clip_promise;
 350         future<Clip> clip = clip_promise.get_future();
 351         post_to_main_thread([this, &clip_promise] {
 352                 int row = playlist_clips->get_currently_playing();
 353                 if (row != -1 && row < int(playlist_clips->size()) - 1) {
 354                         clip_promise.set_value(*playlist_clips->clip(row + 1));
 355                 } else {
 356                         clip_promise.set_value(Clip());
 357                 }
 358         });
 359         return clip.get();
 360 }
 361
 362 void MainWindow::live_player_clip_progress(double played_this_clip, double total_length)
 363 {
 364         playlist_clips->set_currently_playing(playlist_clips->get_currently_playing(), played_this_clip / total_length);
 365
 366         double remaining = total_length - played_this_clip;
 367         for (int row = playlist_clips->get_currently_playing() + 1; row < int(playlist_clips->size()); ++row) {
 368                 const Clip clip = *playlist_clips->clip(row);
 369                 remaining += double(clip.pts_out - clip.pts_in) / TIMEBASE / 0.5;  // FIXME: stop hardcoding speed.
 370         }
 371         int remaining_ms = lrint(remaining * 1e3);
 372
 373         int ms = remaining_ms % 1000;
 374         remaining_ms /= 1000;
 375         int s = remaining_ms % 60;
 376         remaining_ms /= 60;
 377         int m = remaining_ms;
 378
 379         char buf[256];
 380         snprintf(buf, sizeof(buf), "Current output (%d:%02d.%03d left)", m, s, ms);
 381         ui->live_label->setText(buf);
 382 }
 383
 384 void MainWindow::resizeEvent(QResizeEvent *event)
 385 {
 386         QMainWindow::resizeEvent(event);
 387
 388         // Ask for a relayout, but only after the event loop is done doing relayout
 389         // on everything else.
 390         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 391 }
 392
 393 void MainWindow::relayout()
 394 {
 395         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 396         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 397 }
 398
 399 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
 400 {
 401         pts = std::max<int64_t>(pts, 0);
 402         if (clip->pts_out == -1) {
 403                 pts = std::min(pts, current_pts);
 404         } else {
 405                 pts = std::min(pts, clip->pts_out);
 406         }
 407         clip->pts_in = pts;
 408 }
 409
 410 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 411 {
 412         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 413         constexpr int scrub_sensitivity = 100;  // pts units per pixel.
 414         constexpr int wheel_sensitivity = 100;  // pts units per degree.
 415         constexpr int camera_degrees_per_pixel = 15;  // One click of most mice.
 416
 417         unsigned stream_idx = ui->preview_display->get_stream_idx();
 418
 419         if (watched == ui->clip_list) {
 420                 if (event->type() == QEvent::FocusOut) {
 421                         highlight_camera_input(-1);
 422                 }
 423                 return false;
 424         }
 425
 426         if (event->type() != QEvent::Wheel) {
 427                 last_mousewheel_camera_row = -1;
 428         }
 429
 430         if (event->type() == QEvent::MouseButtonPress) {
 431                 QMouseEvent *mouse = (QMouseEvent *)event;
 432
 433                 QTableView *destination;
 434                 ScrubType type;
 435
 436                 if (watched == ui->clip_list->viewport()) {
 437                         destination = ui->clip_list;
 438                         type = SCRUBBING_CLIP_LIST;
 439                 } else if (watched == ui->playlist->viewport()) {
 440                         destination = ui->playlist;
 441                         type = SCRUBBING_PLAYLIST;
 442                 } else {
 443                         return false;
 444                 }
 445                 int column = destination->columnAt(mouse->x());
 446                 int row = destination->rowAt(mouse->y());
 447                 if (column == -1 || row == -1)
 448                         return false;
 449
 450                 if (type == SCRUBBING_CLIP_LIST) {
 451                         if (ClipList::Column(column) == ClipList::Column::IN) {
 452                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 453                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 454                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 455                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 456                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 457                         } else {
 458                                 return false;
 459                         }
 460                 } else {
 461                         if (PlayList::Column(column) == PlayList::Column::IN) {
 462                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 463                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 464                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 465                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 466                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 467                         } else {
 468                                 return false;
 469                         }
 470                 }
 471
 472                 scrubbing = true;
 473                 scrub_row = row;
 474                 scrub_column = column;
 475                 scrub_x_origin = mouse->x();
 476                 scrub_type = type;
 477         } else if (event->type() == QEvent::MouseMove) {
 478                 if (scrubbing) {
 479                         QMouseEvent *mouse = (QMouseEvent *)event;
 480                         int offset = mouse->x() - scrub_x_origin;
 481                         int adjusted_offset;
 482                         if (offset >= dead_zone_pixels) {
 483                                 adjusted_offset = offset - dead_zone_pixels;
 484                         } else if (offset < -dead_zone_pixels) {
 485                                 adjusted_offset = offset + dead_zone_pixels;
 486                         } else {
 487                                 adjusted_offset = 0;
 488                         }
 489
 490                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 491                         currently_deferring_model_changes = true;
 492                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 493                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 494                                 if (scrub_column == int(ClipList::Column::IN)) {
 495                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 496                                         set_pts_in(pts, current_pts, clip);
 497                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 498                                 } else {
 499                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 500                                         pts = std::max(pts, clip->pts_in);
 501                                         pts = std::min(pts, current_pts);
 502                                         clip->pts_out = pts;
 503                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 504                                 }
 505                         } else {
 506                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 507                                 if (scrub_column == int(PlayList::Column::IN)) {
 508                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 509                                         set_pts_in(pts, current_pts, clip);
 510                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 511                                 } else {
 512                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 513                                         pts = std::max(pts, clip->pts_in);
 514                                         pts = std::min(pts, current_pts);
 515                                         clip->pts_out = pts;
 516                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 517                                 }
 518                         }
 519                         currently_deferring_model_changes = false;
 520
 521                         return true;  // Don't use this mouse movement for selecting things.
 522                 }
 523         } else if (event->type() == QEvent::Wheel) {
 524                 QWheelEvent *wheel = (QWheelEvent *)event;
 525
 526                 QTableView *destination;
 527                 int in_column, out_column, camera_column;
 528                 if (watched == ui->clip_list->viewport()) {
 529                         destination = ui->clip_list;
 530                         in_column = int(ClipList::Column::IN);
 531                         out_column = int(ClipList::Column::OUT);
 532                         camera_column = -1;
 533                         last_mousewheel_camera_row = -1;
 534                 } else if (watched == ui->playlist->viewport()) {
 535                         destination = ui->playlist;
 536                         in_column = int(PlayList::Column::IN);
 537                         out_column = int(PlayList::Column::OUT);
 538                         camera_column = int(PlayList::Column::CAMERA);
 539                 } else {
 540                         last_mousewheel_camera_row = -1;
 541                         return false;
 542                 }
 543                 int column = destination->columnAt(wheel->x());
 544                 int row = destination->rowAt(wheel->y());
 545                 if (column == -1 || row == -1) return false;
 546
 547                 currently_deferring_model_changes = true;
 548                 {
 549                         current_change_id = (watched == ui->clip_list->viewport()) ? "cliplist:" : "playlist:";
 550                         ClipProxy clip = (watched == ui->clip_list->viewport()) ?
 551                                 cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 552                         if (watched == ui->playlist->viewport()) {
 553                                 stream_idx = clip->stream_idx;
 554                         }
 555
 556                         if (column != camera_column) {
 557                                 last_mousewheel_camera_row = -1;
 558                         }
 559                         if (column == in_column) {
 560                                 current_change_id += "in:" + to_string(row);
 561                                 int64_t pts = clip->pts_in + wheel->angleDelta().y() * wheel_sensitivity;
 562                                 set_pts_in(pts, current_pts, clip);
 563                                 preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 564                         } else if (column == out_column) {
 565                                 current_change_id += "out:" + to_string(row);
 566                                 int64_t pts = clip->pts_out + wheel->angleDelta().y() * wheel_sensitivity;
 567                                 pts = std::max(pts, clip->pts_in);
 568                                 pts = std::min(pts, current_pts);
 569                                 clip->pts_out = pts;
 570                                 preview_single_frame(pts, stream_idx, LAST_BEFORE);
 571                         } else if (column == camera_column) {
 572                                 current_change_id += "camera:" + to_string(row);
 573                                 int angle_degrees = wheel->angleDelta().y();
 574                                 if (last_mousewheel_camera_row == row) {
 575                                         angle_degrees += leftover_angle_degrees;
 576                                 }
 577
 578                                 int stream_idx = clip->stream_idx + angle_degrees / camera_degrees_per_pixel;
 579                                 stream_idx = std::max(stream_idx, 0);
 580                                 stream_idx = std::min(stream_idx, NUM_CAMERAS - 1);
 581                                 clip->stream_idx = stream_idx;
 582
 583                                 last_mousewheel_camera_row = row;
 584                                 leftover_angle_degrees = angle_degrees % camera_degrees_per_pixel;
 585
 586                                 // Don't update the live view, that's rarely what the operator wants.
 587                         }
 588                 }
 589                 currently_deferring_model_changes = false;
 590         } else if (event->type() == QEvent::MouseButtonRelease) {
 591                 scrubbing = false;
 592         }
 593         return false;
 594 }
 595
 596 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 597 {
 598         if (rounding == LAST_BEFORE) {
 599                 lock_guard<mutex> lock(frame_mu);
 600                 if (frames[stream_idx].empty())
 601                         return;
 602                 auto it = lower_bound(frames[stream_idx].begin(), frames[stream_idx].end(), pts);
 603                 if (it != frames[stream_idx].end()) {
 604                         pts = *it;
 605                 }
 606         } else {
 607                 assert(rounding == FIRST_AT_OR_AFTER);
 608                 lock_guard<mutex> lock(frame_mu);
 609                 if (frames[stream_idx].empty())
 610                         return;
 611                 auto it = upper_bound(frames[stream_idx].begin(), frames[stream_idx].end(), pts - 1);
 612                 if (it != frames[stream_idx].end()) {
 613                         pts = *it;
 614                 }
 615         }
 616
 617         Clip fake_clip;
 618         fake_clip.pts_in = pts;
 619         fake_clip.pts_out = pts + 1;
 620         preview_player->play_clip(fake_clip, stream_idx);
 621 }
 622
 623 void MainWindow::playlist_selection_changed()
 624 {
 625         QItemSelectionModel *selected = ui->playlist->selectionModel();
 626         bool any_selected = selected->hasSelection();
 627         ui->playlist_duplicate_btn->setEnabled(any_selected);
 628         ui->playlist_remove_btn->setEnabled(any_selected);
 629         ui->playlist_move_up_btn->setEnabled(
 630                 any_selected && selected->selectedRows().front().row() > 0);
 631         ui->playlist_move_down_btn->setEnabled(
 632                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 633         ui->play_btn->setEnabled(!playlist_clips->empty());
 634 }
 635
 636 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &)
 637 {
 638         int camera_selected = -1;
 639         if (current.column() >= int(ClipList::Column::CAMERA_1) &&
 640             current.column() <= int(ClipList::Column::CAMERA_4)) {
 641                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 642         }
 643         highlight_camera_input(camera_selected);
 644 }
 645
 646 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 647 {
 648         char time_str[256];
 649         if (estimated_seconds_left < 60.0) {
 650                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 651         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 652                 int s = lrintf(estimated_seconds_left);
 653                 int m = s / 60;
 654                 s %= 60;
 655                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 656         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 657                 int m = lrintf(estimated_seconds_left / 60.0);
 658                 snprintf(time_str, sizeof(time_str), "%dm", m);
 659         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 660                 int m = lrintf(estimated_seconds_left / 60.0);
 661                 int h = m / 60;
 662                 m %= 60;
 663                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 664         } else {  // More than ten hours: Xh.
 665                 int h = lrintf(estimated_seconds_left / 3600.0);
 666                 snprintf(time_str, sizeof(time_str), "%dh", h);
 667         }
 668         char buf[256];
 669         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 670
 671         std::string label = buf;
 672
 673         post_to_main_thread([this, label] {
 674                 disk_free_label->setText(QString::fromStdString(label));
 675                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 676         });
 677 }
 678
 679 void MainWindow::exit_triggered()
 680 {
 681         close();
 682 }
 683
 684 void MainWindow::highlight_camera_input(int stream_idx)
 685 {
 686         if (stream_idx == 0) {
 687                 ui->input1_frame->setStyleSheet("background: rgb(0,255,0)");
 688         } else {
 689                 ui->input1_frame->setStyleSheet("");
 690         }
 691         if (stream_idx == 1) {
 692                 ui->input2_frame->setStyleSheet("background: rgb(0,255,0)");
 693         } else {
 694                 ui->input2_frame->setStyleSheet("");
 695         }
 696         if (stream_idx == 2) {
 697                 ui->input3_frame->setStyleSheet("background: rgb(0,255,0)");
 698         } else {
 699                 ui->input3_frame->setStyleSheet("");
 700         }
 701         if (stream_idx == 3) {
 702                 ui->input4_frame->setStyleSheet("background: rgb(0,255,0)");
 703         } else {
 704                 ui->input4_frame->setStyleSheet("");
 705         }
 706 }