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