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 (cliplist_clips->empty())
 203                 return;
 204
 205         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 206         if (!selected->hasSelection()) {
 207                 preview_player->play_clip(*cliplist_clips->back(), cliplist_clips->size() - 1, 0);
 208                 return;
 209         }
 210
 211         QModelIndex index = selected->currentIndex();
 212         unsigned stream_idx;
 213         if (index.column() >= int(ClipList::Column::CAMERA_1) &&
 214             index.column() <= int(ClipList::Column::CAMERA_4)) {
 215                 stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 216         } else {
 217                 stream_idx = ui->preview_display->get_stream_idx();
 218         }
 219         preview_player->play_clip(*cliplist_clips->clip(index.row()), index.row(), stream_idx);
 220 }
 221
 222 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 223 {
 224         preview_player->override_angle(stream_idx);
 225
 226         // Change the selection if we were previewing a clip from the clip list.
 227         // (The only other thing we could be showing is a pts scrub, and if so,
 228         // that would be selected.)
 229         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 230         if (selected->hasSelection()) {
 231                 QModelIndex cell = selected->selectedIndexes()[0];
 232                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 233                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 234         }
 235 }
 236
 237 void MainWindow::playlist_duplicate()
 238 {
 239         QItemSelectionModel *selected = ui->playlist->selectionModel();
 240         if (!selected->hasSelection()) {
 241                 // Should have been grayed out, but OK.
 242                 return;
 243         }
 244         QModelIndexList rows = selected->selectedRows();
 245         int first = rows.front().row(), last = rows.back().row();
 246         playlist_clips->duplicate_clips(first, last);
 247         playlist_selection_changed();
 248 }
 249
 250 void MainWindow::playlist_remove()
 251 {
 252         QItemSelectionModel *selected = ui->playlist->selectionModel();
 253         if (!selected->hasSelection()) {
 254                 // Should have been grayed out, but OK.
 255                 return;
 256         }
 257         QModelIndexList rows = selected->selectedRows();
 258         int first = rows.front().row(), last = rows.back().row();
 259         playlist_clips->erase_clips(first, last);
 260
 261         // TODO: select the next one in the list?
 262
 263         playlist_selection_changed();
 264 }
 265
 266 void MainWindow::playlist_move(int delta)
 267 {
 268         QItemSelectionModel *selected = ui->playlist->selectionModel();
 269         if (!selected->hasSelection()) {
 270                 // Should have been grayed out, but OK.
 271                 return;
 272         }
 273
 274         QModelIndexList rows = selected->selectedRows();
 275         int first = rows.front().row(), last = rows.back().row();
 276         if ((delta == -1 && first == 0) ||
 277             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 278                 // Should have been grayed out, but OK.
 279                 return;
 280         }
 281
 282         playlist_clips->move_clips(first, last, delta);
 283         playlist_selection_changed();
 284 }
 285
 286 void MainWindow::defer_timer_expired()
 287 {
 288         state_changed(deferred_state);
 289 }
 290
 291 void MainWindow::content_changed()
 292 {
 293         if (defer_timeout->isActive() &&
 294             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 295                 // There's some deferred event waiting, but this event is unrelated.
 296                 // So it's time to short-circuit that timer and do the work it wanted to do.
 297                 defer_timeout->stop();
 298                 state_changed(deferred_state);
 299         }
 300         StateProto state;
 301         *state.mutable_clip_list() = cliplist_clips->serialize();
 302         *state.mutable_play_list() = playlist_clips->serialize();
 303         if (currently_deferring_model_changes) {
 304                 deferred_change_id = current_change_id;
 305                 deferred_state = std::move(state);
 306                 defer_timeout->start(200);
 307                 return;
 308         }
 309         state_changed(state);
 310 }
 311
 312 void MainWindow::state_changed(const StateProto &state)
 313 {
 314         db.store_state(state);
 315 }
 316
 317 void MainWindow::play_clicked()
 318 {
 319         if (playlist_clips->empty())
 320                 return;
 321
 322         QItemSelectionModel *selected = ui->playlist->selectionModel();
 323         int row;
 324         if (!selected->hasSelection()) {
 325                 row = 0;
 326         } else {
 327                 row = selected->selectedRows(0)[0].row();
 328         }
 329
 330         const Clip &clip = *playlist_clips->clip(row);
 331         live_player->play_clip(clip, row, clip.stream_idx);
 332         playlist_clips->set_progress({{ row, 0.0f }});
 333         playlist_clips->set_currently_playing(row, 0.0f);
 334         playlist_selection_changed();
 335 }
 336
 337 void MainWindow::live_player_clip_done()
 338 {
 339         int row = playlist_clips->get_currently_playing();
 340         if (row == -1 || row == int(playlist_clips->size()) - 1) {
 341                 set_output_status("paused");
 342                 playlist_clips->set_progress({});
 343                 playlist_clips->set_currently_playing(-1, 0.0f);
 344         } else {
 345                 playlist_clips->set_progress({{ row + 1, 0.0f }});
 346                 playlist_clips->set_currently_playing(row + 1, 0.0f);
 347         }
 348 }
 349
 350 pair<Clip, size_t> MainWindow::live_player_get_next_clip()
 351 {
 352         // playlist_clips can only be accessed on the main thread.
 353         // Hopefully, we won't have to wait too long for this to come back.
 354         promise<pair<Clip, size_t>> clip_promise;
 355         future<pair<Clip, size_t>> clip = clip_promise.get_future();
 356         post_to_main_thread([this, &clip_promise] {
 357                 int row = playlist_clips->get_currently_playing();
 358                 if (row != -1 && row < int(playlist_clips->size()) - 1) {
 359                         clip_promise.set_value(make_pair(*playlist_clips->clip(row + 1), row + 1));
 360                 } else {
 361                         clip_promise.set_value(make_pair(Clip(), 0));
 362                 }
 363         });
 364         return clip.get();
 365 }
 366
 367 static string format_duration(double t)
 368 {
 369         int t_ms = lrint(t * 1e3);
 370
 371         int ms = t_ms % 1000;
 372         t_ms /= 1000;
 373         int s = t_ms % 60;
 374         t_ms /= 60;
 375         int m = t_ms;
 376
 377         char buf[256];
 378         snprintf(buf, sizeof(buf), "%d:%02d.%03d", m, s, ms);
 379         return buf;
 380 }
 381
 382 void MainWindow::live_player_clip_progress(const map<size_t, double> &progress)
 383 {
 384         playlist_clips->set_progress(progress);
 385
 386         // Look at the last clip and then start counting from there.
 387         assert(!progress.empty());
 388         auto last_it = progress.end();
 389         --last_it;
 390         double remaining = 0.0;
 391         double last_fade_time_seconds = 0.0;
 392         for (size_t row = last_it->first; row < playlist_clips->size(); ++row) {
 393                 const Clip clip = *playlist_clips->clip(row);
 394                 double clip_length = double(clip.pts_out - clip.pts_in) / TIMEBASE / 0.5;  // FIXME: stop hardcoding speed.
 395                 if (row == last_it->first) {
 396                         // A clip we're playing: Subtract the part we've already played.
 397                         remaining = clip_length * (1.0 - last_it->second);
 398                 } else {
 399                         // A clip we haven't played yet: Subtract the part that's overlapping
 400                         // with a previous clip (due to fade).
 401                         remaining += max(clip_length - last_fade_time_seconds, 0.0);
 402                 }
 403                 last_fade_time_seconds = min(clip_length, clip.fade_time_seconds);
 404         }
 405         set_output_status(format_duration(remaining) + " left");
 406 }
 407
 408 void MainWindow::resizeEvent(QResizeEvent *event)
 409 {
 410         QMainWindow::resizeEvent(event);
 411
 412         // Ask for a relayout, but only after the event loop is done doing relayout
 413         // on everything else.
 414         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 415 }
 416
 417 void MainWindow::relayout()
 418 {
 419         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 420         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 421 }
 422
 423 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
 424 {
 425         pts = std::max<int64_t>(pts, 0);
 426         if (clip->pts_out == -1) {
 427                 pts = std::min(pts, current_pts);
 428         } else {
 429                 pts = std::min(pts, clip->pts_out);
 430         }
 431         clip->pts_in = pts;
 432 }
 433
 434 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 435 {
 436         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 437         constexpr int scrub_sensitivity = 100;  // pts units per pixel.
 438         constexpr int wheel_sensitivity = 100;  // pts units per degree.
 439         constexpr int camera_degrees_per_pixel = 15;  // One click of most mice.
 440
 441         unsigned stream_idx = ui->preview_display->get_stream_idx();
 442
 443         if (watched == ui->clip_list) {
 444                 if (event->type() == QEvent::FocusOut) {
 445                         highlight_camera_input(-1);
 446                 }
 447                 return false;
 448         }
 449
 450         if (event->type() != QEvent::Wheel) {
 451                 last_mousewheel_camera_row = -1;
 452         }
 453
 454         if (event->type() == QEvent::MouseButtonPress) {
 455                 QMouseEvent *mouse = (QMouseEvent *)event;
 456
 457                 QTableView *destination;
 458                 ScrubType type;
 459
 460                 if (watched == ui->clip_list->viewport()) {
 461                         destination = ui->clip_list;
 462                         type = SCRUBBING_CLIP_LIST;
 463                 } else if (watched == ui->playlist->viewport()) {
 464                         destination = ui->playlist;
 465                         type = SCRUBBING_PLAYLIST;
 466                 } else {
 467                         return false;
 468                 }
 469                 int column = destination->columnAt(mouse->x());
 470                 int row = destination->rowAt(mouse->y());
 471                 if (column == -1 || row == -1)
 472                         return false;
 473
 474                 if (type == SCRUBBING_CLIP_LIST) {
 475                         if (ClipList::Column(column) == ClipList::Column::IN) {
 476                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 477                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 478                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 479                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 480                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 481                         } else {
 482                                 return false;
 483                         }
 484                 } else {
 485                         if (PlayList::Column(column) == PlayList::Column::IN) {
 486                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 487                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 488                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 489                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 490                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 491                         } else {
 492                                 return false;
 493                         }
 494                 }
 495
 496                 scrubbing = true;
 497                 scrub_row = row;
 498                 scrub_column = column;
 499                 scrub_x_origin = mouse->x();
 500                 scrub_type = type;
 501         } else if (event->type() == QEvent::MouseMove) {
 502                 if (scrubbing) {
 503                         QMouseEvent *mouse = (QMouseEvent *)event;
 504                         int offset = mouse->x() - scrub_x_origin;
 505                         int adjusted_offset;
 506                         if (offset >= dead_zone_pixels) {
 507                                 adjusted_offset = offset - dead_zone_pixels;
 508                         } else if (offset < -dead_zone_pixels) {
 509                                 adjusted_offset = offset + dead_zone_pixels;
 510                         } else {
 511                                 adjusted_offset = 0;
 512                         }
 513
 514                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 515                         currently_deferring_model_changes = true;
 516                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 517                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 518                                 if (scrub_column == int(ClipList::Column::IN)) {
 519                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 520                                         set_pts_in(pts, current_pts, clip);
 521                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 522                                 } else {
 523                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 524                                         pts = std::max(pts, clip->pts_in);
 525                                         pts = std::min(pts, current_pts);
 526                                         clip->pts_out = pts;
 527                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 528                                 }
 529                         } else {
 530                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 531                                 if (scrub_column == int(PlayList::Column::IN)) {
 532                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 533                                         set_pts_in(pts, current_pts, clip);
 534                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 535                                 } else {
 536                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 537                                         pts = std::max(pts, clip->pts_in);
 538                                         pts = std::min(pts, current_pts);
 539                                         clip->pts_out = pts;
 540                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 541                                 }
 542                         }
 543                         currently_deferring_model_changes = false;
 544
 545                         return true;  // Don't use this mouse movement for selecting things.
 546                 }
 547         } else if (event->type() == QEvent::Wheel) {
 548                 QWheelEvent *wheel = (QWheelEvent *)event;
 549
 550                 QTableView *destination;
 551                 int in_column, out_column, camera_column;
 552                 if (watched == ui->clip_list->viewport()) {
 553                         destination = ui->clip_list;
 554                         in_column = int(ClipList::Column::IN);
 555                         out_column = int(ClipList::Column::OUT);
 556                         camera_column = -1;
 557                         last_mousewheel_camera_row = -1;
 558                 } else if (watched == ui->playlist->viewport()) {
 559                         destination = ui->playlist;
 560                         in_column = int(PlayList::Column::IN);
 561                         out_column = int(PlayList::Column::OUT);
 562                         camera_column = int(PlayList::Column::CAMERA);
 563                 } else {
 564                         last_mousewheel_camera_row = -1;
 565                         return false;
 566                 }
 567                 int column = destination->columnAt(wheel->x());
 568                 int row = destination->rowAt(wheel->y());
 569                 if (column == -1 || row == -1) return false;
 570
 571                 // Only adjust pts with the wheel if the given row is selected.
 572                 if (!destination->hasFocus() ||
 573                     row != destination->selectionModel()->currentIndex().row()) {
 574                         return false;
 575                 }
 576
 577                 currently_deferring_model_changes = true;
 578                 {
 579                         current_change_id = (watched == ui->clip_list->viewport()) ? "cliplist:" : "playlist:";
 580                         ClipProxy clip = (watched == ui->clip_list->viewport()) ?
 581                                 cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 582                         if (watched == ui->playlist->viewport()) {
 583                                 stream_idx = clip->stream_idx;
 584                         }
 585
 586                         if (column != camera_column) {
 587                                 last_mousewheel_camera_row = -1;
 588                         }
 589                         if (column == in_column) {
 590                                 current_change_id += "in:" + to_string(row);
 591                                 int64_t pts = clip->pts_in + wheel->angleDelta().y() * wheel_sensitivity;
 592                                 set_pts_in(pts, current_pts, clip);
 593                                 preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 594                         } else if (column == out_column) {
 595                                 current_change_id += "out:" + to_string(row);
 596                                 int64_t pts = clip->pts_out + wheel->angleDelta().y() * wheel_sensitivity;
 597                                 pts = std::max(pts, clip->pts_in);
 598                                 pts = std::min(pts, current_pts);
 599                                 clip->pts_out = pts;
 600                                 preview_single_frame(pts, stream_idx, LAST_BEFORE);
 601                         } else if (column == camera_column) {
 602                                 current_change_id += "camera:" + to_string(row);
 603                                 int angle_degrees = wheel->angleDelta().y();
 604                                 if (last_mousewheel_camera_row == row) {
 605                                         angle_degrees += leftover_angle_degrees;
 606                                 }
 607
 608                                 int stream_idx = clip->stream_idx + angle_degrees / camera_degrees_per_pixel;
 609                                 stream_idx = std::max(stream_idx, 0);
 610                                 stream_idx = std::min(stream_idx, NUM_CAMERAS - 1);
 611                                 clip->stream_idx = stream_idx;
 612
 613                                 last_mousewheel_camera_row = row;
 614                                 leftover_angle_degrees = angle_degrees % camera_degrees_per_pixel;
 615
 616                                 // Don't update the live view, that's rarely what the operator wants.
 617                         }
 618                 }
 619                 currently_deferring_model_changes = false;
 620                 return true;  // Don't scroll.
 621         } else if (event->type() == QEvent::MouseButtonRelease) {
 622                 scrubbing = false;
 623         }
 624         return false;
 625 }
 626
 627 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 628 {
 629         if (rounding == LAST_BEFORE) {
 630                 lock_guard<mutex> lock(frame_mu);
 631                 if (frames[stream_idx].empty())
 632                         return;
 633                 auto it = lower_bound(frames[stream_idx].begin(), frames[stream_idx].end(), pts);
 634                 if (it != frames[stream_idx].end()) {
 635                         pts = *it;
 636                 }
 637         } else {
 638                 assert(rounding == FIRST_AT_OR_AFTER);
 639                 lock_guard<mutex> lock(frame_mu);
 640                 if (frames[stream_idx].empty())
 641                         return;
 642                 auto it = upper_bound(frames[stream_idx].begin(), frames[stream_idx].end(), pts - 1);
 643                 if (it != frames[stream_idx].end()) {
 644                         pts = *it;
 645                 }
 646         }
 647
 648         Clip fake_clip;
 649         fake_clip.pts_in = pts;
 650         fake_clip.pts_out = pts + 1;
 651         preview_player->play_clip(fake_clip, 0, stream_idx);
 652 }
 653
 654 void MainWindow::playlist_selection_changed()
 655 {
 656         QItemSelectionModel *selected = ui->playlist->selectionModel();
 657         bool any_selected = selected->hasSelection();
 658         ui->playlist_duplicate_btn->setEnabled(any_selected);
 659         ui->playlist_remove_btn->setEnabled(any_selected);
 660         ui->playlist_move_up_btn->setEnabled(
 661                 any_selected && selected->selectedRows().front().row() > 0);
 662         ui->playlist_move_down_btn->setEnabled(
 663                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 664         ui->play_btn->setEnabled(!playlist_clips->empty());
 665
 666         if (!any_selected) {
 667                 set_output_status("paused");
 668         } else {
 669                 double remaining = 0.0;
 670                 for (int row = selected->selectedRows().front().row(); row < int(playlist_clips->size()); ++row) {
 671                         const Clip clip = *playlist_clips->clip(row);
 672                         remaining += double(clip.pts_out - clip.pts_in) / TIMEBASE / 0.5;  // FIXME: stop hardcoding speed.
 673                 }
 674                 set_output_status(format_duration(remaining) + " ready");
 675         }
 676 }
 677
 678 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &)
 679 {
 680         int camera_selected = -1;
 681         if (current.column() >= int(ClipList::Column::CAMERA_1) &&
 682             current.column() <= int(ClipList::Column::CAMERA_4)) {
 683                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 684         }
 685         highlight_camera_input(camera_selected);
 686 }
 687
 688 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 689 {
 690         char time_str[256];
 691         if (estimated_seconds_left < 60.0) {
 692                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 693         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 694                 int s = lrintf(estimated_seconds_left);
 695                 int m = s / 60;
 696                 s %= 60;
 697                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 698         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 699                 int m = lrintf(estimated_seconds_left / 60.0);
 700                 snprintf(time_str, sizeof(time_str), "%dm", m);
 701         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 702                 int m = lrintf(estimated_seconds_left / 60.0);
 703                 int h = m / 60;
 704                 m %= 60;
 705                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 706         } else {  // More than ten hours: Xh.
 707                 int h = lrintf(estimated_seconds_left / 3600.0);
 708                 snprintf(time_str, sizeof(time_str), "%dh", h);
 709         }
 710         char buf[256];
 711         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 712
 713         std::string label = buf;
 714
 715         post_to_main_thread([this, label] {
 716                 disk_free_label->setText(QString::fromStdString(label));
 717                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 718         });
 719 }
 720
 721 void MainWindow::exit_triggered()
 722 {
 723         close();
 724 }
 725
 726 void MainWindow::highlight_camera_input(int stream_idx)
 727 {
 728         if (stream_idx == 0) {
 729                 ui->input1_frame->setStyleSheet("background: rgb(0,255,0)");
 730         } else {
 731                 ui->input1_frame->setStyleSheet("");
 732         }
 733         if (stream_idx == 1) {
 734                 ui->input2_frame->setStyleSheet("background: rgb(0,255,0)");
 735         } else {
 736                 ui->input2_frame->setStyleSheet("");
 737         }
 738         if (stream_idx == 2) {
 739                 ui->input3_frame->setStyleSheet("background: rgb(0,255,0)");
 740         } else {
 741                 ui->input3_frame->setStyleSheet("");
 742         }
 743         if (stream_idx == 3) {
 744                 ui->input4_frame->setStyleSheet("background: rgb(0,255,0)");
 745         } else {
 746                 ui->input4_frame->setStyleSheet("");
 747         }
 748 }
 749
 750 void MainWindow::set_output_status(const string &status)
 751 {
 752         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
 753
 754         lock_guard<mutex> lock(queue_status_mu);
 755         queue_status = status;
 756 }
 757
 758 pair<string, string> MainWindow::get_queue_status() const {
 759         lock_guard<mutex> lock(queue_status_mu);
 760         return {queue_status, "text/plain"};
 761 }