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 "flags.h"
   6 #include "player.h"
   7 #include "post_to_main_thread.h"
   8 #include "timebase.h"
   9 #include "ui_mainwindow.h"
  10
  11 #include <QMouseEvent>
  12 #include <QShortcut>
  13 #include <QTimer>
  14 #include <QWheelEvent>
  15 #include <future>
  16 #include <sqlite3.h>
  17 #include <string>
  18 #include <vector>
  19
  20 using namespace std;
  21 using namespace std::placeholders;
  22
  23 MainWindow *global_mainwindow = nullptr;
  24 static ClipList *cliplist_clips;
  25 static PlayList *playlist_clips;
  26
  27 extern int64_t current_pts;
  28 extern mutex frame_mu;
  29 extern vector<int64_t> frames[MAX_STREAMS];
  30
  31 MainWindow::MainWindow()
  32         : ui(new Ui::MainWindow),
  33           db(global_flags.working_directory + "/futatabi.db")
  34 {
  35         global_mainwindow = this;
  36         ui->setupUi(this);
  37
  38         // The menus.
  39         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  40
  41         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
  42         disk_free_label = new QLabel(this);
  43         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
  44         ui->menuBar->setCornerWidget(disk_free_label);
  45
  46         StateProto state = db.get_state();
  47
  48         cliplist_clips = new ClipList(state.clip_list());
  49         ui->clip_list->setModel(cliplist_clips);
  50         connect(cliplist_clips, &ClipList::any_content_changed, this, &MainWindow::content_changed);
  51
  52         playlist_clips = new PlayList(state.play_list());
  53         ui->playlist->setModel(playlist_clips);
  54         connect(playlist_clips, &PlayList::any_content_changed, this, &MainWindow::content_changed);
  55
  56         // For un-highlighting when we lose focus.
  57         ui->clip_list->installEventFilter(this);
  58
  59         // For scrubbing in the pts columns.
  60         ui->clip_list->viewport()->installEventFilter(this);
  61         ui->playlist->viewport()->installEventFilter(this);
  62
  63         QShortcut *cue_in = new QShortcut(QKeySequence(Qt::Key_A), this);
  64         connect(cue_in, &QShortcut::activated, ui->cue_in_btn, &QPushButton::click);
  65         connect(ui->cue_in_btn, &QPushButton::clicked, this, &MainWindow::cue_in_clicked);
  66
  67         QShortcut *cue_out = new QShortcut(QKeySequence(Qt::Key_S), this);
  68         connect(cue_out, &QShortcut::activated, ui->cue_out_btn, &QPushButton::click);
  69         connect(ui->cue_out_btn, &QPushButton::clicked, this, &MainWindow::cue_out_clicked);
  70
  71         QShortcut *queue = new QShortcut(QKeySequence(Qt::Key_Q), this);
  72         connect(queue, &QShortcut::activated, ui->queue_btn, &QPushButton::click);
  73         connect(ui->queue_btn, &QPushButton::clicked, this, &MainWindow::queue_clicked);
  74
  75         QShortcut *preview = new QShortcut(QKeySequence(Qt::Key_W), this);
  76         connect(preview, &QShortcut::activated, ui->preview_btn, &QPushButton::click);
  77         connect(ui->preview_btn, &QPushButton::clicked, this, &MainWindow::preview_clicked);
  78
  79         QShortcut *play = new QShortcut(QKeySequence(Qt::Key_Space), this);
  80         connect(play, &QShortcut::activated, ui->play_btn, &QPushButton::click);
  81         connect(ui->play_btn, &QPushButton::clicked, this, &MainWindow::play_clicked);
  82
  83         QShortcut *preview_1 = new QShortcut(QKeySequence(Qt::Key_1), this);
  84         connect(preview_1, &QShortcut::activated, ui->preview_1_btn, &QPushButton::click);
  85         connect(ui->input1_display, &JPEGFrameView::clicked, ui->preview_1_btn, &QPushButton::click);
  86         connect(ui->preview_1_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(0); });
  87         ui->input1_display->set_overlay("1");
  88
  89         QShortcut *preview_2 = new QShortcut(QKeySequence(Qt::Key_2), this);
  90         connect(preview_2, &QShortcut::activated, ui->preview_2_btn, &QPushButton::click);
  91         connect(ui->input2_display, &JPEGFrameView::clicked, ui->preview_2_btn, &QPushButton::click);
  92         connect(ui->preview_2_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(1); });
  93         ui->input2_display->set_overlay("2");
  94
  95         QShortcut *preview_3 = new QShortcut(QKeySequence(Qt::Key_3), this);
  96         connect(preview_3, &QShortcut::activated, ui->preview_3_btn, &QPushButton::click);
  97         connect(ui->input3_display, &JPEGFrameView::clicked, ui->preview_3_btn, &QPushButton::click);
  98         connect(ui->preview_3_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(2); });
  99         ui->input3_display->set_overlay("3");
 100
 101         QShortcut *preview_4 = new QShortcut(QKeySequence(Qt::Key_4), this);
 102         connect(preview_4, &QShortcut::activated, ui->preview_4_btn, &QPushButton::click);
 103         connect(ui->input4_display, &JPEGFrameView::clicked, ui->preview_4_btn, &QPushButton::click);
 104         connect(ui->preview_4_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(3); });
 105         ui->input4_display->set_overlay("4");
 106
 107         connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 108
 109         connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
 110         QShortcut *delete_key = new QShortcut(QKeySequence(Qt::Key_Delete), ui->playlist);
 111         connect(delete_key, &QShortcut::activated, [this] {
 112                 if (ui->playlist->hasFocus()) {
 113                         playlist_remove();
 114                 }
 115         });
 116
 117         // TODO: support drag-and-drop.
 118         connect(ui->playlist_move_up_btn, &QPushButton::clicked, [this]{ playlist_move(-1); });
 119         connect(ui->playlist_move_down_btn, &QPushButton::clicked, [this]{ playlist_move(1); });
 120
 121         connect(ui->playlist->selectionModel(), &QItemSelectionModel::selectionChanged,
 122                 this, &MainWindow::playlist_selection_changed);
 123         playlist_selection_changed();  // First time set-up.
 124
 125         preview_player = new Player(ui->preview_display, /*also_output_to_stream=*/false);
 126         live_player = new Player(ui->live_display, /*also_output_to_stream=*/true);
 127         live_player->set_done_callback([this]{
 128                 post_to_main_thread([this]{
 129                         live_player_clip_done();
 130                 });
 131         });
 132         live_player->set_next_clip_callback(bind(&MainWindow::live_player_get_next_clip, this));
 133         live_player->set_progress_callback([this](const map<size_t, double> &progress) {
 134                 post_to_main_thread([this, progress] {
 135                         live_player_clip_progress(progress);
 136                 });
 137         });
 138         set_output_status("paused");
 139
 140         defer_timeout = new QTimer(this);
 141         defer_timeout->setSingleShot(true);
 142         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 143
 144         connect(ui->clip_list->selectionModel(), &QItemSelectionModel::currentChanged,
 145                 this, &MainWindow::clip_list_selection_changed);
 146 }
 147
 148 void MainWindow::cue_in_clicked()
 149 {
 150         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 151                 cliplist_clips->mutable_back()->pts_in = current_pts;
 152                 return;
 153         }
 154         Clip clip;
 155         clip.pts_in = current_pts;
 156         cliplist_clips->add_clip(clip);
 157         playlist_selection_changed();
 158 }
 159
 160 void MainWindow::cue_out_clicked()
 161 {
 162         if (!cliplist_clips->empty()) {
 163                 cliplist_clips->mutable_back()->pts_out = current_pts;
 164                 // TODO: select the row in the clip list?
 165         }
 166 }
 167
 168 void MainWindow::queue_clicked()
 169 {
 170         if (cliplist_clips->empty()) {
 171                 return;
 172         }
 173
 174         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 175         if (!selected->hasSelection()) {
 176                 Clip clip = *cliplist_clips->back();
 177                 clip.stream_idx = 0;
 178                 if (clip.pts_out != -1) {
 179                         playlist_clips->add_clip(clip);
 180                         playlist_selection_changed();
 181                 }
 182                 return;
 183         }
 184
 185         QModelIndex index = selected->currentIndex();
 186         Clip clip = *cliplist_clips->clip(index.row());
 187         if (index.column() >= int(ClipList::Column::CAMERA_1) &&
 188             index.column() <= int(ClipList::Column::CAMERA_4)) {
 189                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 190         } else {
 191                 clip.stream_idx = ui->preview_display->get_stream_idx();
 192         }
 193
 194         if (clip.pts_out != -1) {
 195                 playlist_clips->add_clip(clip);
 196                 playlist_selection_changed();
 197         }
 198 }
 199
 200 void MainWindow::preview_clicked()
 201 {
 202         if (ui->playlist->hasFocus()) {
 203                 // Allow the playlist as preview iff it has focus and something is selected.
 204                 QItemSelectionModel *selected = ui->playlist->selectionModel();
 205                 if (selected->hasSelection()) {
 206                         QModelIndex index = selected->currentIndex();
 207                         const Clip &clip = *playlist_clips->clip(index.row());
 208                         preview_player->play_clip(clip, index.row(), clip.stream_idx);
 209                         return;
 210                 }
 211         }
 212
 213         if (cliplist_clips->empty())
 214                 return;
 215
 216         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 217         if (!selected->hasSelection()) {
 218                 preview_player->play_clip(*cliplist_clips->back(), cliplist_clips->size() - 1, 0);
 219                 return;
 220         }
 221
 222         QModelIndex index = selected->currentIndex();
 223         unsigned stream_idx;
 224         if (index.column() >= int(ClipList::Column::CAMERA_1) &&
 225             index.column() <= int(ClipList::Column::CAMERA_4)) {
 226                 stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 227         } else {
 228                 stream_idx = ui->preview_display->get_stream_idx();
 229         }
 230         preview_player->play_clip(*cliplist_clips->clip(index.row()), index.row(), stream_idx);
 231 }
 232
 233 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 234 {
 235         preview_player->override_angle(stream_idx);
 236
 237         // Change the selection if we were previewing a clip from the clip list.
 238         // (The only other thing we could be showing is a pts scrub, and if so,
 239         // that would be selected.)
 240         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 241         if (selected->hasSelection()) {
 242                 QModelIndex cell = selected->selectedIndexes()[0];
 243                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 244                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 245         }
 246 }
 247
 248 void MainWindow::playlist_duplicate()
 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->duplicate_clips(first, last);
 258         playlist_selection_changed();
 259 }
 260
 261 void MainWindow::playlist_remove()
 262 {
 263         QItemSelectionModel *selected = ui->playlist->selectionModel();
 264         if (!selected->hasSelection()) {
 265                 // Should have been grayed out, but OK.
 266                 return;
 267         }
 268         QModelIndexList rows = selected->selectedRows();
 269         int first = rows.front().row(), last = rows.back().row();
 270         playlist_clips->erase_clips(first, last);
 271
 272         // TODO: select the next one in the list?
 273
 274         playlist_selection_changed();
 275 }
 276
 277 void MainWindow::playlist_move(int delta)
 278 {
 279         QItemSelectionModel *selected = ui->playlist->selectionModel();
 280         if (!selected->hasSelection()) {
 281                 // Should have been grayed out, but OK.
 282                 return;
 283         }
 284
 285         QModelIndexList rows = selected->selectedRows();
 286         int first = rows.front().row(), last = rows.back().row();
 287         if ((delta == -1 && first == 0) ||
 288             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 289                 // Should have been grayed out, but OK.
 290                 return;
 291         }
 292
 293         playlist_clips->move_clips(first, last, delta);
 294         playlist_selection_changed();
 295 }
 296
 297 void MainWindow::defer_timer_expired()
 298 {
 299         state_changed(deferred_state);
 300 }
 301
 302 void MainWindow::content_changed()
 303 {
 304         if (defer_timeout->isActive() &&
 305             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 306                 // There's some deferred event waiting, but this event is unrelated.
 307                 // So it's time to short-circuit that timer and do the work it wanted to do.
 308                 defer_timeout->stop();
 309                 state_changed(deferred_state);
 310         }
 311         StateProto state;
 312         *state.mutable_clip_list() = cliplist_clips->serialize();
 313         *state.mutable_play_list() = playlist_clips->serialize();
 314         if (currently_deferring_model_changes) {
 315                 deferred_change_id = current_change_id;
 316                 deferred_state = std::move(state);
 317                 defer_timeout->start(200);
 318                 return;
 319         }
 320         state_changed(state);
 321 }
 322
 323 void MainWindow::state_changed(const StateProto &state)
 324 {
 325         db.store_state(state);
 326 }
 327
 328 void MainWindow::play_clicked()
 329 {
 330         if (playlist_clips->empty())
 331                 return;
 332
 333         QItemSelectionModel *selected = ui->playlist->selectionModel();
 334         int row;
 335         if (!selected->hasSelection()) {
 336                 row = 0;
 337         } else {
 338                 row = selected->selectedRows(0)[0].row();
 339         }
 340
 341         const Clip &clip = *playlist_clips->clip(row);
 342         live_player->play_clip(clip, row, clip.stream_idx);
 343         playlist_clips->set_progress({{ row, 0.0f }});
 344         playlist_clips->set_currently_playing(row, 0.0f);
 345         playlist_selection_changed();
 346 }
 347
 348 void MainWindow::live_player_clip_done()
 349 {
 350         int row = playlist_clips->get_currently_playing();
 351         if (row == -1 || row == int(playlist_clips->size()) - 1) {
 352                 set_output_status("paused");
 353                 playlist_clips->set_progress({});
 354                 playlist_clips->set_currently_playing(-1, 0.0f);
 355         } else {
 356                 playlist_clips->set_progress({{ row + 1, 0.0f }});
 357                 playlist_clips->set_currently_playing(row + 1, 0.0f);
 358         }
 359 }
 360
 361 pair<Clip, size_t> MainWindow::live_player_get_next_clip()
 362 {
 363         // playlist_clips can only be accessed on the main thread.
 364         // Hopefully, we won't have to wait too long for this to come back.
 365         promise<pair<Clip, size_t>> clip_promise;
 366         future<pair<Clip, size_t>> clip = clip_promise.get_future();
 367         post_to_main_thread([this, &clip_promise] {
 368                 int row = playlist_clips->get_currently_playing();
 369                 if (row != -1 && row < int(playlist_clips->size()) - 1) {
 370                         clip_promise.set_value(make_pair(*playlist_clips->clip(row + 1), row + 1));
 371                 } else {
 372                         clip_promise.set_value(make_pair(Clip(), 0));
 373                 }
 374         });
 375         return clip.get();
 376 }
 377
 378 static string format_duration(double t)
 379 {
 380         int t_ms = lrint(t * 1e3);
 381
 382         int ms = t_ms % 1000;
 383         t_ms /= 1000;
 384         int s = t_ms % 60;
 385         t_ms /= 60;
 386         int m = t_ms;
 387
 388         char buf[256];
 389         snprintf(buf, sizeof(buf), "%d:%02d.%03d", m, s, ms);
 390         return buf;
 391 }
 392
 393 void MainWindow::live_player_clip_progress(const map<size_t, double> &progress)
 394 {
 395         playlist_clips->set_progress(progress);
 396
 397         // Look at the last clip and then start counting from there.
 398         assert(!progress.empty());
 399         auto last_it = progress.end();
 400         --last_it;
 401         double remaining = 0.0;
 402         double last_fade_time_seconds = 0.0;
 403         for (size_t row = last_it->first; row < playlist_clips->size(); ++row) {
 404                 const Clip clip = *playlist_clips->clip(row);
 405                 double clip_length = double(clip.pts_out - clip.pts_in) / TIMEBASE / 0.5;  // FIXME: stop hardcoding speed.
 406                 if (row == last_it->first) {
 407                         // A clip we're playing: Subtract the part we've already played.
 408                         remaining = clip_length * (1.0 - last_it->second);
 409                 } else {
 410                         // A clip we haven't played yet: Subtract the part that's overlapping
 411                         // with a previous clip (due to fade).
 412                         remaining += max(clip_length - last_fade_time_seconds, 0.0);
 413                 }
 414                 last_fade_time_seconds = min(clip_length, clip.fade_time_seconds);
 415         }
 416         set_output_status(format_duration(remaining) + " left");
 417 }
 418
 419 void MainWindow::resizeEvent(QResizeEvent *event)
 420 {
 421         QMainWindow::resizeEvent(event);
 422
 423         // Ask for a relayout, but only after the event loop is done doing relayout
 424         // on everything else.
 425         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 426 }
 427
 428 void MainWindow::relayout()
 429 {
 430         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 431         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 432 }
 433
 434 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
 435 {
 436         pts = std::max<int64_t>(pts, 0);
 437         if (clip->pts_out == -1) {
 438                 pts = std::min(pts, current_pts);
 439         } else {
 440                 pts = std::min(pts, clip->pts_out);
 441         }
 442         clip->pts_in = pts;
 443 }
 444
 445 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 446 {
 447         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 448         constexpr int scrub_sensitivity = 100;  // pts units per pixel.
 449         constexpr int wheel_sensitivity = 100;  // pts units per degree.
 450         constexpr int camera_degrees_per_pixel = 15;  // One click of most mice.
 451
 452         unsigned stream_idx = ui->preview_display->get_stream_idx();
 453
 454         if (watched == ui->clip_list) {
 455                 if (event->type() == QEvent::FocusOut) {
 456                         highlight_camera_input(-1);
 457                 }
 458                 return false;
 459         }
 460
 461         if (event->type() != QEvent::Wheel) {
 462                 last_mousewheel_camera_row = -1;
 463         }
 464
 465         if (event->type() == QEvent::MouseButtonPress) {
 466                 QMouseEvent *mouse = (QMouseEvent *)event;
 467
 468                 QTableView *destination;
 469                 ScrubType type;
 470
 471                 if (watched == ui->clip_list->viewport()) {
 472                         destination = ui->clip_list;
 473                         type = SCRUBBING_CLIP_LIST;
 474                 } else if (watched == ui->playlist->viewport()) {
 475                         destination = ui->playlist;
 476                         type = SCRUBBING_PLAYLIST;
 477                 } else {
 478                         return false;
 479                 }
 480                 int column = destination->columnAt(mouse->x());
 481                 int row = destination->rowAt(mouse->y());
 482                 if (column == -1 || row == -1)
 483                         return false;
 484
 485                 if (type == SCRUBBING_CLIP_LIST) {
 486                         if (ClipList::Column(column) == ClipList::Column::IN) {
 487                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 488                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 489                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 490                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 491                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 492                         } else {
 493                                 return false;
 494                         }
 495                 } else {
 496                         if (PlayList::Column(column) == PlayList::Column::IN) {
 497                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 498                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 499                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 500                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 501                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 502                         } else {
 503                                 return false;
 504                         }
 505                 }
 506
 507                 scrubbing = true;
 508                 scrub_row = row;
 509                 scrub_column = column;
 510                 scrub_x_origin = mouse->x();
 511                 scrub_type = type;
 512         } else if (event->type() == QEvent::MouseMove) {
 513                 if (scrubbing) {
 514                         QMouseEvent *mouse = (QMouseEvent *)event;
 515                         int offset = mouse->x() - scrub_x_origin;
 516                         int adjusted_offset;
 517                         if (offset >= dead_zone_pixels) {
 518                                 adjusted_offset = offset - dead_zone_pixels;
 519                         } else if (offset < -dead_zone_pixels) {
 520                                 adjusted_offset = offset + dead_zone_pixels;
 521                         } else {
 522                                 adjusted_offset = 0;
 523                         }
 524
 525                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 526                         currently_deferring_model_changes = true;
 527                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 528                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 529                                 if (scrub_column == int(ClipList::Column::IN)) {
 530                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 531                                         set_pts_in(pts, current_pts, clip);
 532                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 533                                 } else {
 534                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 535                                         pts = std::max(pts, clip->pts_in);
 536                                         pts = std::min(pts, current_pts);
 537                                         clip->pts_out = pts;
 538                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 539                                 }
 540                         } else {
 541                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 542                                 if (scrub_column == int(PlayList::Column::IN)) {
 543                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 544                                         set_pts_in(pts, current_pts, clip);
 545                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 546                                 } else {
 547                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 548                                         pts = std::max(pts, clip->pts_in);
 549                                         pts = std::min(pts, current_pts);
 550                                         clip->pts_out = pts;
 551                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 552                                 }
 553                         }
 554                         currently_deferring_model_changes = false;
 555
 556                         return true;  // Don't use this mouse movement for selecting things.
 557                 }
 558         } else if (event->type() == QEvent::Wheel) {
 559                 QWheelEvent *wheel = (QWheelEvent *)event;
 560
 561                 QTableView *destination;
 562                 int in_column, out_column, camera_column;
 563                 if (watched == ui->clip_list->viewport()) {
 564                         destination = ui->clip_list;
 565                         in_column = int(ClipList::Column::IN);
 566                         out_column = int(ClipList::Column::OUT);
 567                         camera_column = -1;
 568                         last_mousewheel_camera_row = -1;
 569                 } else if (watched == ui->playlist->viewport()) {
 570                         destination = ui->playlist;
 571                         in_column = int(PlayList::Column::IN);
 572                         out_column = int(PlayList::Column::OUT);
 573                         camera_column = int(PlayList::Column::CAMERA);
 574                 } else {
 575                         last_mousewheel_camera_row = -1;
 576                         return false;
 577                 }
 578                 int column = destination->columnAt(wheel->x());
 579                 int row = destination->rowAt(wheel->y());
 580                 if (column == -1 || row == -1) return false;
 581
 582                 // Only adjust pts with the wheel if the given row is selected.
 583                 if (!destination->hasFocus() ||
 584                     row != destination->selectionModel()->currentIndex().row()) {
 585                         return false;
 586                 }
 587
 588                 currently_deferring_model_changes = true;
 589                 {
 590                         current_change_id = (watched == ui->clip_list->viewport()) ? "cliplist:" : "playlist:";
 591                         ClipProxy clip = (watched == ui->clip_list->viewport()) ?
 592                                 cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 593                         if (watched == ui->playlist->viewport()) {
 594                                 stream_idx = clip->stream_idx;
 595                         }
 596
 597                         if (column != camera_column) {
 598                                 last_mousewheel_camera_row = -1;
 599                         }
 600                         if (column == in_column) {
 601                                 current_change_id += "in:" + to_string(row);
 602                                 int64_t pts = clip->pts_in + wheel->angleDelta().y() * wheel_sensitivity;
 603                                 set_pts_in(pts, current_pts, clip);
 604                                 preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 605                         } else if (column == out_column) {
 606                                 current_change_id += "out:" + to_string(row);
 607                                 int64_t pts = clip->pts_out + wheel->angleDelta().y() * wheel_sensitivity;
 608                                 pts = std::max(pts, clip->pts_in);
 609                                 pts = std::min(pts, current_pts);
 610                                 clip->pts_out = pts;
 611                                 preview_single_frame(pts, stream_idx, LAST_BEFORE);
 612                         } else if (column == camera_column) {
 613                                 current_change_id += "camera:" + to_string(row);
 614                                 int angle_degrees = wheel->angleDelta().y();
 615                                 if (last_mousewheel_camera_row == row) {
 616                                         angle_degrees += leftover_angle_degrees;
 617                                 }
 618
 619                                 int stream_idx = clip->stream_idx + angle_degrees / camera_degrees_per_pixel;
 620                                 stream_idx = std::max(stream_idx, 0);
 621                                 stream_idx = std::min(stream_idx, NUM_CAMERAS - 1);
 622                                 clip->stream_idx = stream_idx;
 623
 624                                 last_mousewheel_camera_row = row;
 625                                 leftover_angle_degrees = angle_degrees % camera_degrees_per_pixel;
 626
 627                                 // Don't update the live view, that's rarely what the operator wants.
 628                         }
 629                 }
 630                 currently_deferring_model_changes = false;
 631                 return true;  // Don't scroll.
 632         } else if (event->type() == QEvent::MouseButtonRelease) {
 633                 scrubbing = false;
 634         }
 635         return false;
 636 }
 637
 638 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 639 {
 640         if (rounding == LAST_BEFORE) {
 641                 lock_guard<mutex> lock(frame_mu);
 642                 if (frames[stream_idx].empty())
 643                         return;
 644                 auto it = lower_bound(frames[stream_idx].begin(), frames[stream_idx].end(), pts);
 645                 if (it != frames[stream_idx].end()) {
 646                         pts = *it;
 647                 }
 648         } else {
 649                 assert(rounding == FIRST_AT_OR_AFTER);
 650                 lock_guard<mutex> lock(frame_mu);
 651                 if (frames[stream_idx].empty())
 652                         return;
 653                 auto it = upper_bound(frames[stream_idx].begin(), frames[stream_idx].end(), pts - 1);
 654                 if (it != frames[stream_idx].end()) {
 655                         pts = *it;
 656                 }
 657         }
 658
 659         Clip fake_clip;
 660         fake_clip.pts_in = pts;
 661         fake_clip.pts_out = pts + 1;
 662         preview_player->play_clip(fake_clip, 0, stream_idx);
 663 }
 664
 665 void MainWindow::playlist_selection_changed()
 666 {
 667         QItemSelectionModel *selected = ui->playlist->selectionModel();
 668         bool any_selected = selected->hasSelection();
 669         ui->playlist_duplicate_btn->setEnabled(any_selected);
 670         ui->playlist_remove_btn->setEnabled(any_selected);
 671         ui->playlist_move_up_btn->setEnabled(
 672                 any_selected && selected->selectedRows().front().row() > 0);
 673         ui->playlist_move_down_btn->setEnabled(
 674                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 675         ui->play_btn->setEnabled(!playlist_clips->empty());
 676
 677         if (!any_selected) {
 678                 set_output_status("paused");
 679         } else {
 680                 double remaining = 0.0;
 681                 for (int row = selected->selectedRows().front().row(); row < int(playlist_clips->size()); ++row) {
 682                         const Clip clip = *playlist_clips->clip(row);
 683                         remaining += double(clip.pts_out - clip.pts_in) / TIMEBASE / 0.5;  // FIXME: stop hardcoding speed.
 684                 }
 685                 set_output_status(format_duration(remaining) + " ready");
 686         }
 687 }
 688
 689 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &)
 690 {
 691         int camera_selected = -1;
 692         if (current.column() >= int(ClipList::Column::CAMERA_1) &&
 693             current.column() <= int(ClipList::Column::CAMERA_4)) {
 694                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 695         }
 696         highlight_camera_input(camera_selected);
 697 }
 698
 699 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 700 {
 701         char time_str[256];
 702         if (estimated_seconds_left < 60.0) {
 703                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 704         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 705                 int s = lrintf(estimated_seconds_left);
 706                 int m = s / 60;
 707                 s %= 60;
 708                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 709         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 710                 int m = lrintf(estimated_seconds_left / 60.0);
 711                 snprintf(time_str, sizeof(time_str), "%dm", m);
 712         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 713                 int m = lrintf(estimated_seconds_left / 60.0);
 714                 int h = m / 60;
 715                 m %= 60;
 716                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 717         } else {  // More than ten hours: Xh.
 718                 int h = lrintf(estimated_seconds_left / 3600.0);
 719                 snprintf(time_str, sizeof(time_str), "%dh", h);
 720         }
 721         char buf[256];
 722         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 723
 724         std::string label = buf;
 725
 726         post_to_main_thread([this, label] {
 727                 disk_free_label->setText(QString::fromStdString(label));
 728                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 729         });
 730 }
 731
 732 void MainWindow::exit_triggered()
 733 {
 734         close();
 735 }
 736
 737 void MainWindow::highlight_camera_input(int stream_idx)
 738 {
 739         if (stream_idx == 0) {
 740                 ui->input1_frame->setStyleSheet("background: rgb(0,255,0)");
 741         } else {
 742                 ui->input1_frame->setStyleSheet("");
 743         }
 744         if (stream_idx == 1) {
 745                 ui->input2_frame->setStyleSheet("background: rgb(0,255,0)");
 746         } else {
 747                 ui->input2_frame->setStyleSheet("");
 748         }
 749         if (stream_idx == 2) {
 750                 ui->input3_frame->setStyleSheet("background: rgb(0,255,0)");
 751         } else {
 752                 ui->input3_frame->setStyleSheet("");
 753         }
 754         if (stream_idx == 3) {
 755                 ui->input4_frame->setStyleSheet("background: rgb(0,255,0)");
 756         } else {
 757                 ui->input4_frame->setStyleSheet("");
 758         }
 759 }
 760
 761 void MainWindow::set_output_status(const string &status)
 762 {
 763         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
 764
 765         lock_guard<mutex> lock(queue_status_mu);
 766         queue_status = status;
 767 }
 768
 769 pair<string, string> MainWindow::get_queue_status() const {
 770         lock_guard<mutex> lock(queue_status_mu);
 771         return {queue_status, "text/plain"};
 772 }