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

   1 #include "mainwindow.h"
   2
   3 #include "shared/aboutdialog.h"
   4 #include "clip_list.h"
   5 #include "shared/disk_space_estimator.h"
   6 #include "flags.h"
   7 #include "frame_on_disk.h"
   8 #include "player.h"
   9 #include "shared/post_to_main_thread.h"
  10 #include "shared/timebase.h"
  11 #include "ui_mainwindow.h"
  12
  13 #include <QDesktopServices>
  14 #include <QMessageBox>
  15 #include <QMouseEvent>
  16 #include <QShortcut>
  17 #include <QTimer>
  18 #include <QWheelEvent>
  19 #include <future>
  20 #include <sqlite3.h>
  21 #include <string>
  22 #include <vector>
  23
  24 using namespace std;
  25 using namespace std::placeholders;
  26
  27 MainWindow *global_mainwindow = nullptr;
  28 static ClipList *cliplist_clips;
  29 static PlayList *playlist_clips;
  30
  31 extern int64_t current_pts;
  32
  33 MainWindow::MainWindow()
  34         : ui(new Ui::MainWindow),
  35           db(global_flags.working_directory + "/futatabi.db")
  36 {
  37         global_mainwindow = this;
  38         ui->setupUi(this);
  39
  40         // The menus.
  41         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  42         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
  43         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
  44
  45         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
  46         disk_free_label = new QLabel(this);
  47         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
  48         ui->menuBar->setCornerWidget(disk_free_label);
  49
  50         StateProto state = db.get_state();
  51
  52         cliplist_clips = new ClipList(state.clip_list());
  53         ui->clip_list->setModel(cliplist_clips);
  54         connect(cliplist_clips, &ClipList::any_content_changed, this, &MainWindow::content_changed);
  55
  56         playlist_clips = new PlayList(state.play_list());
  57         ui->playlist->setModel(playlist_clips);
  58         connect(playlist_clips, &PlayList::any_content_changed, this, &MainWindow::content_changed);
  59
  60         // For un-highlighting when we lose focus.
  61         ui->clip_list->installEventFilter(this);
  62
  63         // For scrubbing in the pts columns.
  64         ui->clip_list->viewport()->installEventFilter(this);
  65         ui->playlist->viewport()->installEventFilter(this);
  66
  67         QShortcut *cue_in = new QShortcut(QKeySequence(Qt::Key_A), this);
  68         connect(cue_in, &QShortcut::activated, ui->cue_in_btn, &QPushButton::click);
  69         connect(ui->cue_in_btn, &QPushButton::clicked, this, &MainWindow::cue_in_clicked);
  70
  71         QShortcut *cue_out = new QShortcut(QKeySequence(Qt::Key_S), this);
  72         connect(cue_out, &QShortcut::activated, ui->cue_out_btn, &QPushButton::click);
  73         connect(ui->cue_out_btn, &QPushButton::clicked, this, &MainWindow::cue_out_clicked);
  74
  75         QShortcut *queue = new QShortcut(QKeySequence(Qt::Key_Q), this);
  76         connect(queue, &QShortcut::activated, ui->queue_btn, &QPushButton::click);
  77         connect(ui->queue_btn, &QPushButton::clicked, this, &MainWindow::queue_clicked);
  78
  79         QShortcut *preview = new QShortcut(QKeySequence(Qt::Key_W), this);
  80         connect(preview, &QShortcut::activated, ui->preview_btn, &QPushButton::click);
  81         connect(ui->preview_btn, &QPushButton::clicked, this, &MainWindow::preview_clicked);
  82
  83         QShortcut *play = new QShortcut(QKeySequence(Qt::Key_Space), this);
  84         connect(play, &QShortcut::activated, ui->play_btn, &QPushButton::click);
  85         connect(ui->play_btn, &QPushButton::clicked, this, &MainWindow::play_clicked);
  86
  87         QShortcut *preview_1 = new QShortcut(QKeySequence(Qt::Key_1), this);
  88         connect(preview_1, &QShortcut::activated, ui->preview_1_btn, &QPushButton::click);
  89         connect(ui->input1_display, &JPEGFrameView::clicked, ui->preview_1_btn, &QPushButton::click);
  90         connect(ui->preview_1_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(0); });
  91         ui->input1_display->set_overlay("1");
  92
  93         QShortcut *preview_2 = new QShortcut(QKeySequence(Qt::Key_2), this);
  94         connect(preview_2, &QShortcut::activated, ui->preview_2_btn, &QPushButton::click);
  95         connect(ui->input2_display, &JPEGFrameView::clicked, ui->preview_2_btn, &QPushButton::click);
  96         connect(ui->preview_2_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(1); });
  97         ui->input2_display->set_overlay("2");
  98
  99         QShortcut *preview_3 = new QShortcut(QKeySequence(Qt::Key_3), this);
 100         connect(preview_3, &QShortcut::activated, ui->preview_3_btn, &QPushButton::click);
 101         connect(ui->input3_display, &JPEGFrameView::clicked, ui->preview_3_btn, &QPushButton::click);
 102         connect(ui->preview_3_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(2); });
 103         ui->input3_display->set_overlay("3");
 104
 105         QShortcut *preview_4 = new QShortcut(QKeySequence(Qt::Key_4), this);
 106         connect(preview_4, &QShortcut::activated, ui->preview_4_btn, &QPushButton::click);
 107         connect(ui->input4_display, &JPEGFrameView::clicked, ui->preview_4_btn, &QPushButton::click);
 108         connect(ui->preview_4_btn, &QPushButton::clicked, [this]{ preview_angle_clicked(3); });
 109         ui->input4_display->set_overlay("4");
 110
 111         connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 112
 113         connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
 114         QShortcut *delete_key = new QShortcut(QKeySequence(Qt::Key_Delete), ui->playlist);
 115         connect(delete_key, &QShortcut::activated, [this] {
 116                 if (ui->playlist->hasFocus()) {
 117                         playlist_remove();
 118                 }
 119         });
 120
 121         // TODO: support drag-and-drop.
 122         connect(ui->playlist_move_up_btn, &QPushButton::clicked, [this]{ playlist_move(-1); });
 123         connect(ui->playlist_move_down_btn, &QPushButton::clicked, [this]{ playlist_move(1); });
 124
 125         connect(ui->playlist->selectionModel(), &QItemSelectionModel::selectionChanged,
 126                 this, &MainWindow::playlist_selection_changed);
 127         playlist_selection_changed();  // First time set-up.
 128
 129         preview_player.reset(new Player(ui->preview_display, /*also_output_to_stream=*/false));
 130         live_player.reset(new Player(ui->live_display, /*also_output_to_stream=*/true));
 131         live_player->set_done_callback([this]{
 132                 post_to_main_thread([this]{
 133                         live_player_clip_done();
 134                 });
 135         });
 136         live_player->set_next_clip_callback(bind(&MainWindow::live_player_get_next_clip, this));
 137         live_player->set_progress_callback([this](const map<size_t, double> &progress) {
 138                 post_to_main_thread([this, progress] {
 139                         live_player_clip_progress(progress);
 140                 });
 141         });
 142         set_output_status("paused");
 143
 144         defer_timeout = new QTimer(this);
 145         defer_timeout->setSingleShot(true);
 146         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 147
 148         connect(ui->clip_list->selectionModel(), &QItemSelectionModel::currentChanged,
 149                 this, &MainWindow::clip_list_selection_changed);
 150 }
 151
 152 MainWindow::~MainWindow()
 153 {
 154         // Empty so that we can forward-declare Player in the .h file.
 155 }
 156
 157 void MainWindow::cue_in_clicked()
 158 {
 159         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 160                 cliplist_clips->mutable_back()->pts_in = current_pts;
 161                 return;
 162         }
 163         Clip clip;
 164         clip.pts_in = current_pts;
 165         cliplist_clips->add_clip(clip);
 166         playlist_selection_changed();
 167         ui->clip_list->scrollToBottom();
 168 }
 169
 170 void MainWindow::cue_out_clicked()
 171 {
 172         if (!cliplist_clips->empty()) {
 173                 cliplist_clips->mutable_back()->pts_out = current_pts;
 174                 // TODO: select the row in the clip list?
 175         }
 176 }
 177
 178 void MainWindow::queue_clicked()
 179 {
 180         if (cliplist_clips->empty()) {
 181                 return;
 182         }
 183
 184         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 185         if (!selected->hasSelection()) {
 186                 Clip clip = *cliplist_clips->back();
 187                 clip.stream_idx = 0;
 188                 if (clip.pts_out != -1) {
 189                         playlist_clips->add_clip(clip);
 190                         playlist_selection_changed();
 191                         ui->playlist->scrollToBottom();
 192                 }
 193                 return;
 194         }
 195
 196         QModelIndex index = selected->currentIndex();
 197         Clip clip = *cliplist_clips->clip(index.row());
 198         if (index.column() >= int(ClipList::Column::CAMERA_1) &&
 199             index.column() <= int(ClipList::Column::CAMERA_4)) {
 200                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 201         } else {
 202                 clip.stream_idx = ui->preview_display->get_stream_idx();
 203         }
 204
 205         if (clip.pts_out != -1) {
 206                 playlist_clips->add_clip(clip);
 207                 playlist_selection_changed();
 208                 ui->playlist->scrollToBottom();
 209                 if (!ui->playlist->selectionModel()->hasSelection()) {
 210                         // TODO: Figure out why this doesn't always seem to actually select the row.
 211                         QModelIndex bottom = playlist_clips->index(playlist_clips->size() - 1, 0);
 212                         ui->playlist->setCurrentIndex(bottom);
 213                 }
 214         }
 215 }
 216
 217 void MainWindow::preview_clicked()
 218 {
 219         if (ui->playlist->hasFocus()) {
 220                 // Allow the playlist as preview iff it has focus and something is selected.
 221                 QItemSelectionModel *selected = ui->playlist->selectionModel();
 222                 if (selected->hasSelection()) {
 223                         QModelIndex index = selected->currentIndex();
 224                         const Clip &clip = *playlist_clips->clip(index.row());
 225                         preview_player->play_clip(clip, index.row(), clip.stream_idx);
 226                         return;
 227                 }
 228         }
 229
 230         if (cliplist_clips->empty())
 231                 return;
 232
 233         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 234         if (!selected->hasSelection()) {
 235                 preview_player->play_clip(*cliplist_clips->back(), cliplist_clips->size() - 1, 0);
 236                 return;
 237         }
 238
 239         QModelIndex index = selected->currentIndex();
 240         unsigned stream_idx;
 241         if (index.column() >= int(ClipList::Column::CAMERA_1) &&
 242             index.column() <= int(ClipList::Column::CAMERA_4)) {
 243                 stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 244         } else {
 245                 stream_idx = ui->preview_display->get_stream_idx();
 246         }
 247         preview_player->play_clip(*cliplist_clips->clip(index.row()), index.row(), stream_idx);
 248 }
 249
 250 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 251 {
 252         preview_player->override_angle(stream_idx);
 253
 254         // Change the selection if we were previewing a clip from the clip list.
 255         // (The only other thing we could be showing is a pts scrub, and if so,
 256         // that would be selected.)
 257         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 258         if (selected->hasSelection()) {
 259                 QModelIndex cell = selected->selectedIndexes()[0];
 260                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 261                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 262         }
 263 }
 264
 265 void MainWindow::playlist_duplicate()
 266 {
 267         QItemSelectionModel *selected = ui->playlist->selectionModel();
 268         if (!selected->hasSelection()) {
 269                 // Should have been grayed out, but OK.
 270                 return;
 271         }
 272         QModelIndexList rows = selected->selectedRows();
 273         int first = rows.front().row(), last = rows.back().row();
 274         playlist_clips->duplicate_clips(first, last);
 275         playlist_selection_changed();
 276 }
 277
 278 void MainWindow::playlist_remove()
 279 {
 280         QItemSelectionModel *selected = ui->playlist->selectionModel();
 281         if (!selected->hasSelection()) {
 282                 // Should have been grayed out, but OK.
 283                 return;
 284         }
 285         QModelIndexList rows = selected->selectedRows();
 286         int first = rows.front().row(), last = rows.back().row();
 287         playlist_clips->erase_clips(first, last);
 288
 289         // TODO: select the next one in the list?
 290
 291         playlist_selection_changed();
 292 }
 293
 294 void MainWindow::playlist_move(int delta)
 295 {
 296         QItemSelectionModel *selected = ui->playlist->selectionModel();
 297         if (!selected->hasSelection()) {
 298                 // Should have been grayed out, but OK.
 299                 return;
 300         }
 301
 302         QModelIndexList rows = selected->selectedRows();
 303         int first = rows.front().row(), last = rows.back().row();
 304         if ((delta == -1 && first == 0) ||
 305             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 306                 // Should have been grayed out, but OK.
 307                 return;
 308         }
 309
 310         playlist_clips->move_clips(first, last, delta);
 311         playlist_selection_changed();
 312 }
 313
 314 void MainWindow::defer_timer_expired()
 315 {
 316         state_changed(deferred_state);
 317 }
 318
 319 void MainWindow::content_changed()
 320 {
 321         if (defer_timeout->isActive() &&
 322             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 323                 // There's some deferred event waiting, but this event is unrelated.
 324                 // So it's time to short-circuit that timer and do the work it wanted to do.
 325                 defer_timeout->stop();
 326                 state_changed(deferred_state);
 327         }
 328         StateProto state;
 329         *state.mutable_clip_list() = cliplist_clips->serialize();
 330         *state.mutable_play_list() = playlist_clips->serialize();
 331         if (currently_deferring_model_changes) {
 332                 deferred_change_id = current_change_id;
 333                 deferred_state = std::move(state);
 334                 defer_timeout->start(200);
 335                 return;
 336         }
 337         state_changed(state);
 338 }
 339
 340 void MainWindow::state_changed(const StateProto &state)
 341 {
 342         db.store_state(state);
 343 }
 344
 345 void MainWindow::play_clicked()
 346 {
 347         if (playlist_clips->empty())
 348                 return;
 349
 350         QItemSelectionModel *selected = ui->playlist->selectionModel();
 351         int row;
 352         if (!selected->hasSelection()) {
 353                 row = 0;
 354         } else {
 355                 row = selected->selectedRows(0)[0].row();
 356         }
 357
 358         const Clip &clip = *playlist_clips->clip(row);
 359         live_player->play_clip(clip, row, clip.stream_idx);
 360         playlist_clips->set_progress({{ row, 0.0f }});
 361         playlist_clips->set_currently_playing(row, 0.0f);
 362         playlist_selection_changed();
 363 }
 364
 365 void MainWindow::live_player_clip_done()
 366 {
 367         int row = playlist_clips->get_currently_playing();
 368         if (row == -1 || row == int(playlist_clips->size()) - 1) {
 369                 set_output_status("paused");
 370                 playlist_clips->set_progress({});
 371                 playlist_clips->set_currently_playing(-1, 0.0f);
 372         } else {
 373                 playlist_clips->set_progress({{ row + 1, 0.0f }});
 374                 playlist_clips->set_currently_playing(row + 1, 0.0f);
 375         }
 376 }
 377
 378 pair<Clip, size_t> MainWindow::live_player_get_next_clip()
 379 {
 380         // playlist_clips can only be accessed on the main thread.
 381         // Hopefully, we won't have to wait too long for this to come back.
 382         //
 383         // TODO: If MainWindow is in the process of being destroyed and waiting
 384         // for Player to shut down, we could have a deadlock here.
 385         promise<pair<Clip, size_t>> clip_promise;
 386         future<pair<Clip, size_t>> clip = clip_promise.get_future();
 387         post_to_main_thread([this, &clip_promise] {
 388                 int row = playlist_clips->get_currently_playing();
 389                 if (row != -1 && row < int(playlist_clips->size()) - 1) {
 390                         clip_promise.set_value(make_pair(*playlist_clips->clip(row + 1), row + 1));
 391                 } else {
 392                         clip_promise.set_value(make_pair(Clip(), 0));
 393                 }
 394         });
 395         return clip.get();
 396 }
 397
 398 static string format_duration(double t)
 399 {
 400         int t_ms = lrint(t * 1e3);
 401
 402         int ms = t_ms % 1000;
 403         t_ms /= 1000;
 404         int s = t_ms % 60;
 405         t_ms /= 60;
 406         int m = t_ms;
 407
 408         char buf[256];
 409         snprintf(buf, sizeof(buf), "%d:%02d.%03d", m, s, ms);
 410         return buf;
 411 }
 412
 413 void MainWindow::live_player_clip_progress(const map<size_t, double> &progress)
 414 {
 415         playlist_clips->set_progress(progress);
 416
 417         // Look at the last clip and then start counting from there.
 418         assert(!progress.empty());
 419         auto last_it = progress.end();
 420         --last_it;
 421         double remaining = 0.0;
 422         double last_fade_time_seconds = 0.0;
 423         for (size_t row = last_it->first; row < playlist_clips->size(); ++row) {
 424                 const Clip clip = *playlist_clips->clip(row);
 425                 double clip_length = double(clip.pts_out - clip.pts_in) / TIMEBASE / 0.5;  // FIXME: stop hardcoding speed.
 426                 if (row == last_it->first) {
 427                         // A clip we're playing: Subtract the part we've already played.
 428                         remaining = clip_length * (1.0 - last_it->second);
 429                 } else {
 430                         // A clip we haven't played yet: Subtract the part that's overlapping
 431                         // with a previous clip (due to fade).
 432                         remaining += max(clip_length - last_fade_time_seconds, 0.0);
 433                 }
 434                 last_fade_time_seconds = min(clip_length, clip.fade_time_seconds);
 435         }
 436         set_output_status(format_duration(remaining) + " left");
 437 }
 438
 439 void MainWindow::resizeEvent(QResizeEvent *event)
 440 {
 441         QMainWindow::resizeEvent(event);
 442
 443         // Ask for a relayout, but only after the event loop is done doing relayout
 444         // on everything else.
 445         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 446 }
 447
 448 void MainWindow::relayout()
 449 {
 450         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 451         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 452 }
 453
 454 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
 455 {
 456         pts = std::max<int64_t>(pts, 0);
 457         if (clip->pts_out == -1) {
 458                 pts = std::min(pts, current_pts);
 459         } else {
 460                 pts = std::min(pts, clip->pts_out);
 461         }
 462         clip->pts_in = pts;
 463 }
 464
 465 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 466 {
 467         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 468         constexpr int scrub_sensitivity = 100;  // pts units per pixel.
 469         constexpr int wheel_sensitivity = 100;  // pts units per degree.
 470         constexpr int camera_degrees_per_pixel = 15;  // One click of most mice.
 471
 472         unsigned stream_idx = ui->preview_display->get_stream_idx();
 473
 474         if (watched == ui->clip_list) {
 475                 if (event->type() == QEvent::FocusOut) {
 476                         highlight_camera_input(-1);
 477                 }
 478                 return false;
 479         }
 480
 481         if (event->type() != QEvent::Wheel) {
 482                 last_mousewheel_camera_row = -1;
 483         }
 484
 485         if (event->type() == QEvent::MouseButtonPress) {
 486                 QMouseEvent *mouse = (QMouseEvent *)event;
 487
 488                 QTableView *destination;
 489                 ScrubType type;
 490
 491                 if (watched == ui->clip_list->viewport()) {
 492                         destination = ui->clip_list;
 493                         type = SCRUBBING_CLIP_LIST;
 494                 } else if (watched == ui->playlist->viewport()) {
 495                         destination = ui->playlist;
 496                         type = SCRUBBING_PLAYLIST;
 497                 } else {
 498                         return false;
 499                 }
 500                 int column = destination->columnAt(mouse->x());
 501                 int row = destination->rowAt(mouse->y());
 502                 if (column == -1 || row == -1)
 503                         return false;
 504
 505                 if (type == SCRUBBING_CLIP_LIST) {
 506                         if (ClipList::Column(column) == ClipList::Column::IN) {
 507                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 508                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 509                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 510                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 511                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 512                         } else {
 513                                 return false;
 514                         }
 515                 } else {
 516                         if (PlayList::Column(column) == PlayList::Column::IN) {
 517                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 518                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 519                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 520                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 521                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 522                         } else {
 523                                 return false;
 524                         }
 525                 }
 526
 527                 scrubbing = true;
 528                 scrub_row = row;
 529                 scrub_column = column;
 530                 scrub_x_origin = mouse->x();
 531                 scrub_type = type;
 532         } else if (event->type() == QEvent::MouseMove) {
 533                 if (scrubbing) {
 534                         QMouseEvent *mouse = (QMouseEvent *)event;
 535                         int offset = mouse->x() - scrub_x_origin;
 536                         int adjusted_offset;
 537                         if (offset >= dead_zone_pixels) {
 538                                 adjusted_offset = offset - dead_zone_pixels;
 539                         } else if (offset < -dead_zone_pixels) {
 540                                 adjusted_offset = offset + dead_zone_pixels;
 541                         } else {
 542                                 adjusted_offset = 0;
 543                         }
 544
 545                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 546                         currently_deferring_model_changes = true;
 547                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 548                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 549                                 if (scrub_column == int(ClipList::Column::IN)) {
 550                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 551                                         set_pts_in(pts, current_pts, clip);
 552                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 553                                 } else {
 554                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 555                                         pts = std::max(pts, clip->pts_in);
 556                                         pts = std::min(pts, current_pts);
 557                                         clip->pts_out = pts;
 558                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 559                                 }
 560                         } else {
 561                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 562                                 if (scrub_column == int(PlayList::Column::IN)) {
 563                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 564                                         set_pts_in(pts, current_pts, clip);
 565                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 566                                 } else {
 567                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 568                                         pts = std::max(pts, clip->pts_in);
 569                                         pts = std::min(pts, current_pts);
 570                                         clip->pts_out = pts;
 571                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 572                                 }
 573                         }
 574                         currently_deferring_model_changes = false;
 575
 576                         return true;  // Don't use this mouse movement for selecting things.
 577                 }
 578         } else if (event->type() == QEvent::Wheel) {
 579                 QWheelEvent *wheel = (QWheelEvent *)event;
 580
 581                 QTableView *destination;
 582                 int in_column, out_column, camera_column;
 583                 if (watched == ui->clip_list->viewport()) {
 584                         destination = ui->clip_list;
 585                         in_column = int(ClipList::Column::IN);
 586                         out_column = int(ClipList::Column::OUT);
 587                         camera_column = -1;
 588                         last_mousewheel_camera_row = -1;
 589                 } else if (watched == ui->playlist->viewport()) {
 590                         destination = ui->playlist;
 591                         in_column = int(PlayList::Column::IN);
 592                         out_column = int(PlayList::Column::OUT);
 593                         camera_column = int(PlayList::Column::CAMERA);
 594                 } else {
 595                         last_mousewheel_camera_row = -1;
 596                         return false;
 597                 }
 598                 int column = destination->columnAt(wheel->x());
 599                 int row = destination->rowAt(wheel->y());
 600                 if (column == -1 || row == -1) return false;
 601
 602                 // Only adjust pts with the wheel if the given row is selected.
 603                 if (!destination->hasFocus() ||
 604                     row != destination->selectionModel()->currentIndex().row()) {
 605                         return false;
 606                 }
 607
 608                 currently_deferring_model_changes = true;
 609                 {
 610                         current_change_id = (watched == ui->clip_list->viewport()) ? "cliplist:" : "playlist:";
 611                         ClipProxy clip = (watched == ui->clip_list->viewport()) ?
 612                                 cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 613                         if (watched == ui->playlist->viewport()) {
 614                                 stream_idx = clip->stream_idx;
 615                         }
 616
 617                         if (column != camera_column) {
 618                                 last_mousewheel_camera_row = -1;
 619                         }
 620                         if (column == in_column) {
 621                                 current_change_id += "in:" + to_string(row);
 622                                 int64_t pts = clip->pts_in + wheel->angleDelta().y() * wheel_sensitivity;
 623                                 set_pts_in(pts, current_pts, clip);
 624                                 preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 625                         } else if (column == out_column) {
 626                                 current_change_id += "out:" + to_string(row);
 627                                 int64_t pts = clip->pts_out + wheel->angleDelta().y() * wheel_sensitivity;
 628                                 pts = std::max(pts, clip->pts_in);
 629                                 pts = std::min(pts, current_pts);
 630                                 clip->pts_out = pts;
 631                                 preview_single_frame(pts, stream_idx, LAST_BEFORE);
 632                         } else if (column == camera_column) {
 633                                 current_change_id += "camera:" + to_string(row);
 634                                 int angle_degrees = wheel->angleDelta().y();
 635                                 if (last_mousewheel_camera_row == row) {
 636                                         angle_degrees += leftover_angle_degrees;
 637                                 }
 638
 639                                 int stream_idx = clip->stream_idx + angle_degrees / camera_degrees_per_pixel;
 640                                 stream_idx = std::max(stream_idx, 0);
 641                                 stream_idx = std::min(stream_idx, NUM_CAMERAS - 1);
 642                                 clip->stream_idx = stream_idx;
 643
 644                                 last_mousewheel_camera_row = row;
 645                                 leftover_angle_degrees = angle_degrees % camera_degrees_per_pixel;
 646
 647                                 // Don't update the live view, that's rarely what the operator wants.
 648                         }
 649                 }
 650                 currently_deferring_model_changes = false;
 651                 return true;  // Don't scroll.
 652         } else if (event->type() == QEvent::MouseButtonRelease) {
 653                 scrubbing = false;
 654         }
 655         return false;
 656 }
 657
 658 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 659 {
 660         if (rounding == LAST_BEFORE) {
 661                 lock_guard<mutex> lock(frame_mu);
 662                 if (frames[stream_idx].empty())
 663                         return;
 664                 auto it = find_last_frame_before(frames[stream_idx], pts);
 665                 if (it != frames[stream_idx].end()) {
 666                         pts = it->pts;
 667                 }
 668         } else {
 669                 assert(rounding == FIRST_AT_OR_AFTER);
 670                 lock_guard<mutex> lock(frame_mu);
 671                 if (frames[stream_idx].empty())
 672                         return;
 673                 auto it = find_first_frame_at_or_after(frames[stream_idx], pts);
 674                 if (it != frames[stream_idx].end()) {
 675                         pts = it->pts;
 676                 }
 677         }
 678
 679         Clip fake_clip;
 680         fake_clip.pts_in = pts;
 681         fake_clip.pts_out = pts + 1;
 682         preview_player->play_clip(fake_clip, 0, stream_idx);
 683 }
 684
 685 void MainWindow::playlist_selection_changed()
 686 {
 687         QItemSelectionModel *selected = ui->playlist->selectionModel();
 688         bool any_selected = selected->hasSelection();
 689         ui->playlist_duplicate_btn->setEnabled(any_selected);
 690         ui->playlist_remove_btn->setEnabled(any_selected);
 691         ui->playlist_move_up_btn->setEnabled(
 692                 any_selected && selected->selectedRows().front().row() > 0);
 693         ui->playlist_move_down_btn->setEnabled(
 694                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 695         ui->play_btn->setEnabled(!playlist_clips->empty());
 696
 697         if (!any_selected) {
 698                 set_output_status("paused");
 699         } else {
 700                 double remaining = 0.0;
 701                 for (int row = selected->selectedRows().front().row(); row < int(playlist_clips->size()); ++row) {
 702                         const Clip clip = *playlist_clips->clip(row);
 703                         remaining += double(clip.pts_out - clip.pts_in) / TIMEBASE / 0.5;  // FIXME: stop hardcoding speed.
 704                 }
 705                 set_output_status(format_duration(remaining) + " ready");
 706         }
 707 }
 708
 709 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &)
 710 {
 711         int camera_selected = -1;
 712         if (current.column() >= int(ClipList::Column::CAMERA_1) &&
 713             current.column() <= int(ClipList::Column::CAMERA_4)) {
 714                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 715         }
 716         highlight_camera_input(camera_selected);
 717 }
 718
 719 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 720 {
 721         char time_str[256];
 722         if (estimated_seconds_left < 60.0) {
 723                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 724         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 725                 int s = lrintf(estimated_seconds_left);
 726                 int m = s / 60;
 727                 s %= 60;
 728                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 729         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 730                 int m = lrintf(estimated_seconds_left / 60.0);
 731                 snprintf(time_str, sizeof(time_str), "%dm", m);
 732         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 733                 int m = lrintf(estimated_seconds_left / 60.0);
 734                 int h = m / 60;
 735                 m %= 60;
 736                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 737         } else {  // More than ten hours: Xh.
 738                 int h = lrintf(estimated_seconds_left / 3600.0);
 739                 snprintf(time_str, sizeof(time_str), "%dh", h);
 740         }
 741         char buf[256];
 742         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 743
 744         std::string label = buf;
 745
 746         post_to_main_thread([this, label] {
 747                 disk_free_label->setText(QString::fromStdString(label));
 748                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 749         });
 750 }
 751
 752 void MainWindow::exit_triggered()
 753 {
 754         close();
 755 }
 756
 757 void MainWindow::manual_triggered()
 758 {
 759         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 760                 QMessageBox msgbox;
 761                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 762                 msgbox.exec();
 763         }
 764 }
 765
 766 void MainWindow::about_triggered()
 767 {
 768         AboutDialog("Futatabi", "Multicamera slow motion video server").exec();
 769 }
 770
 771 void MainWindow::highlight_camera_input(int stream_idx)
 772 {
 773         if (stream_idx == 0) {
 774                 ui->input1_frame->setStyleSheet("background: rgb(0,255,0)");
 775         } else {
 776                 ui->input1_frame->setStyleSheet("");
 777         }
 778         if (stream_idx == 1) {
 779                 ui->input2_frame->setStyleSheet("background: rgb(0,255,0)");
 780         } else {
 781                 ui->input2_frame->setStyleSheet("");
 782         }
 783         if (stream_idx == 2) {
 784                 ui->input3_frame->setStyleSheet("background: rgb(0,255,0)");
 785         } else {
 786                 ui->input3_frame->setStyleSheet("");
 787         }
 788         if (stream_idx == 3) {
 789                 ui->input4_frame->setStyleSheet("background: rgb(0,255,0)");
 790         } else {
 791                 ui->input4_frame->setStyleSheet("");
 792         }
 793 }
 794
 795 void MainWindow::set_output_status(const string &status)
 796 {
 797         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
 798
 799         lock_guard<mutex> lock(queue_status_mu);
 800         queue_status = status;
 801 }
 802
 803 pair<string, string> MainWindow::get_queue_status() const {
 804         lock_guard<mutex> lock(queue_status_mu);
 805         return {queue_status, "text/plain"};
 806 }