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

   1 #include "mainwindow.h"
   2
   3 #include "clip_list.h"
   4 #include "export.h"
   5 #include "flags.h"
   6 #include "frame_on_disk.h"
   7 #include "player.h"
   8 #include "shared/aboutdialog.h"
   9 #include "shared/disk_space_estimator.h"
  10 #include "shared/post_to_main_thread.h"
  11 #include "shared/timebase.h"
  12 #include "ui_mainwindow.h"
  13
  14 #include <QDesktopServices>
  15 #include <QFileDialog>
  16 #include <QMessageBox>
  17 #include <QMouseEvent>
  18 #include <QNetworkReply>
  19 #include <QShortcut>
  20 #include <QTimer>
  21 #include <QWheelEvent>
  22 #include <future>
  23 #include <sqlite3.h>
  24 #include <string>
  25 #include <vector>
  26
  27 using namespace std;
  28 using namespace std::placeholders;
  29
  30 MainWindow *global_mainwindow = nullptr;
  31 static ClipList *cliplist_clips;
  32 static PlayList *playlist_clips;
  33
  34 extern int64_t current_pts;
  35
  36 MainWindow::MainWindow()
  37         : ui(new Ui::MainWindow),
  38           db(global_flags.working_directory + "/futatabi.db")
  39 {
  40         global_mainwindow = this;
  41         ui->setupUi(this);
  42
  43         // Load settings from database.
  44         SettingsProto settings = db.get_settings();
  45         if (!global_flags.interpolation_quality_set) {
  46                 if (settings.interpolation_quality() != 0) {
  47                         global_flags.interpolation_quality = settings.interpolation_quality() - 1;
  48                 }
  49         }
  50         if (!global_flags.cue_point_padding_set) {
  51                 global_flags.cue_point_padding_seconds = settings.cue_point_padding_seconds();  // Default 0 is fine.
  52         }
  53         if (global_flags.interpolation_quality == 0) {
  54                 // Allocate something just for simplicity; we won't be using it
  55                 // unless the user changes runtime, in which case 1 is fine.
  56                 flow_initialized_interpolation_quality = 1;
  57         } else {
  58                 flow_initialized_interpolation_quality = global_flags.interpolation_quality;
  59         }
  60         save_settings();
  61
  62         // The menus.
  63         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  64         connect(ui->export_cliplist_clip_multitrack_action, &QAction::triggered, this, &MainWindow::export_cliplist_clip_multitrack_triggered);
  65         connect(ui->export_playlist_clip_interpolated_action, &QAction::triggered, this, &MainWindow::export_playlist_clip_interpolated_triggered);
  66         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
  67         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
  68         connect(ui->undo_action, &QAction::triggered, this, &MainWindow::undo_triggered);
  69         connect(ui->redo_action, &QAction::triggered, this, &MainWindow::redo_triggered);
  70         ui->undo_action->setEnabled(false);
  71         ui->redo_action->setEnabled(false);
  72
  73         // The quality group.
  74         QActionGroup *quality_group = new QActionGroup(ui->interpolation_menu);
  75         quality_group->addAction(ui->quality_0_action);
  76         quality_group->addAction(ui->quality_1_action);
  77         quality_group->addAction(ui->quality_2_action);
  78         quality_group->addAction(ui->quality_3_action);
  79         quality_group->addAction(ui->quality_4_action);
  80         if (global_flags.interpolation_quality == 0) {
  81                 ui->quality_0_action->setChecked(true);
  82         } else if (global_flags.interpolation_quality == 1) {
  83                 ui->quality_1_action->setChecked(true);
  84         } else if (global_flags.interpolation_quality == 2) {
  85                 ui->quality_2_action->setChecked(true);
  86         } else if (global_flags.interpolation_quality == 3) {
  87                 ui->quality_3_action->setChecked(true);
  88         } else if (global_flags.interpolation_quality == 4) {
  89                 ui->quality_4_action->setChecked(true);
  90         } else {
  91                 assert(false);
  92         }
  93         connect(ui->quality_0_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 0, _1));
  94         connect(ui->quality_1_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 1, _1));
  95         connect(ui->quality_2_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 2, _1));
  96         connect(ui->quality_3_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 3, _1));
  97         connect(ui->quality_4_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 4, _1));
  98
  99         // The cue point padding group.
 100         QActionGroup *padding_group = new QActionGroup(ui->interpolation_menu);
 101         padding_group->addAction(ui->padding_0_action);
 102         padding_group->addAction(ui->padding_1_action);
 103         padding_group->addAction(ui->padding_2_action);
 104         padding_group->addAction(ui->padding_5_action);
 105         if (global_flags.cue_point_padding_seconds <= 1e-3) {
 106                 ui->padding_0_action->setChecked(true);
 107         } else if (fabs(global_flags.cue_point_padding_seconds - 1.0) < 1e-3) {
 108                 ui->padding_1_action->setChecked(true);
 109         } else if (fabs(global_flags.cue_point_padding_seconds - 2.0) < 1e-3) {
 110                 ui->padding_2_action->setChecked(true);
 111         } else if (fabs(global_flags.cue_point_padding_seconds - 5.0) < 1e-3) {
 112                 ui->padding_5_action->setChecked(true);
 113         } else {
 114                 // Nothing to check, which is fine.
 115         }
 116         connect(ui->padding_0_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 0.0, _1));
 117         connect(ui->padding_1_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 1.0, _1));
 118         connect(ui->padding_2_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 2.0, _1));
 119         connect(ui->padding_5_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 5.0, _1));
 120
 121         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 122         disk_free_label = new QLabel(this);
 123         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 124         ui->menuBar->setCornerWidget(disk_free_label);
 125
 126         StateProto state = db.get_state();
 127         undo_stack.push_back(state);  // The undo stack always has the current state on top.
 128
 129         cliplist_clips = new ClipList(state.clip_list());
 130         ui->clip_list->setModel(cliplist_clips);
 131         connect(cliplist_clips, &ClipList::any_content_changed, this, &MainWindow::content_changed);
 132
 133         playlist_clips = new PlayList(state.play_list());
 134         ui->playlist->setModel(playlist_clips);
 135         connect(playlist_clips, &PlayList::any_content_changed, this, &MainWindow::content_changed);
 136
 137         // For un-highlighting when we lose focus.
 138         ui->clip_list->installEventFilter(this);
 139
 140         // For scrubbing in the pts columns.
 141         ui->clip_list->viewport()->installEventFilter(this);
 142         ui->playlist->viewport()->installEventFilter(this);
 143
 144         QShortcut *cue_in = new QShortcut(QKeySequence(Qt::Key_A), this);
 145         connect(cue_in, &QShortcut::activated, ui->cue_in_btn, &QPushButton::click);
 146         connect(ui->cue_in_btn, &QPushButton::clicked, this, &MainWindow::cue_in_clicked);
 147
 148         QShortcut *cue_out = new QShortcut(QKeySequence(Qt::Key_S), this);
 149         connect(cue_out, &QShortcut::activated, ui->cue_out_btn, &QPushButton::click);
 150         connect(ui->cue_out_btn, &QPushButton::clicked, this, &MainWindow::cue_out_clicked);
 151
 152         QShortcut *queue = new QShortcut(QKeySequence(Qt::Key_Q), this);
 153         connect(queue, &QShortcut::activated, ui->queue_btn, &QPushButton::click);
 154         connect(ui->queue_btn, &QPushButton::clicked, this, &MainWindow::queue_clicked);
 155
 156         QShortcut *preview = new QShortcut(QKeySequence(Qt::Key_W), this);
 157         connect(preview, &QShortcut::activated, ui->preview_btn, &QPushButton::click);
 158         connect(ui->preview_btn, &QPushButton::clicked, this, &MainWindow::preview_clicked);
 159
 160         QShortcut *play = new QShortcut(QKeySequence(Qt::Key_Space), this);
 161         connect(play, &QShortcut::activated, ui->play_btn, &QPushButton::click);
 162         connect(ui->play_btn, &QPushButton::clicked, this, &MainWindow::play_clicked);
 163
 164         connect(ui->stop_btn, &QPushButton::clicked, this, &MainWindow::stop_clicked);
 165         ui->stop_btn->setEnabled(false);
 166
 167         connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 168
 169         connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
 170         QShortcut *delete_key = new QShortcut(QKeySequence(Qt::Key_Delete), ui->playlist);
 171         connect(delete_key, &QShortcut::activated, [this] {
 172                 if (ui->playlist->hasFocus()) {
 173                         playlist_remove();
 174                 }
 175         });
 176
 177         // TODO: support drag-and-drop.
 178         connect(ui->playlist_move_up_btn, &QPushButton::clicked, [this] { playlist_move(-1); });
 179         connect(ui->playlist_move_down_btn, &QPushButton::clicked, [this] { playlist_move(1); });
 180
 181         connect(ui->playlist->selectionModel(), &QItemSelectionModel::selectionChanged,
 182                 this, &MainWindow::playlist_selection_changed);
 183         playlist_selection_changed();  // First time set-up.
 184
 185         preview_player.reset(new Player(ui->preview_display, Player::NO_STREAM_OUTPUT));
 186         live_player.reset(new Player(ui->live_display, Player::HTTPD_STREAM_OUTPUT));
 187         live_player->set_done_callback([this] {
 188                 post_to_main_thread([this] {
 189                         live_player_done();
 190                 });
 191         });
 192         live_player->set_progress_callback([this](const map<uint64_t, double> &progress, double time_remaining) {
 193                 post_to_main_thread([this, progress, time_remaining] {
 194                         live_player_clip_progress(progress, time_remaining);
 195                 });
 196         });
 197         set_output_status("paused");
 198
 199         defer_timeout = new QTimer(this);
 200         defer_timeout->setSingleShot(true);
 201         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 202         ui->undo_action->setEnabled(true);
 203
 204         connect(ui->clip_list->selectionModel(), &QItemSelectionModel::currentChanged,
 205                 this, &MainWindow::clip_list_selection_changed);
 206         enable_or_disable_queue_button();
 207
 208         // Find out how many cameras we have in the existing frames;
 209         // if none, we start with two cameras.
 210         num_cameras = 2;
 211         {
 212                 lock_guard<mutex> lock(frame_mu);
 213                 for (size_t stream_idx = 2; stream_idx < MAX_STREAMS; ++stream_idx) {
 214                         if (!frames[stream_idx].empty()) {
 215                                 num_cameras = stream_idx + 1;
 216                         }
 217                 }
 218         }
 219         change_num_cameras();
 220
 221         if (!global_flags.tally_url.empty()) {
 222                 start_tally();
 223         }
 224 }
 225
 226 void MainWindow::change_num_cameras()
 227 {
 228         assert(num_cameras >= displays.size());  // We only add, never remove.
 229
 230         // Make new display rows.
 231         unsigned display_rows = (num_cameras + 1) / 2;
 232         ui->video_displays->setStretch(1, display_rows);
 233         for (unsigned i = displays.size(); i < num_cameras; ++i) {
 234                 QFrame *frame = new QFrame(this);
 235                 frame->setAutoFillBackground(true);
 236
 237                 QLayout *layout = new QGridLayout(frame);
 238                 frame->setLayout(layout);
 239                 layout->setContentsMargins(3, 3, 3, 3);
 240
 241                 JPEGFrameView *display = new JPEGFrameView(frame);
 242                 display->setAutoFillBackground(true);
 243                 layout->addWidget(display);
 244
 245                 ui->input_displays->addWidget(frame, i / 2, i % 2);
 246                 display->set_overlay(to_string(i + 1));
 247
 248                 QPushButton *preview_btn = new QPushButton(this);
 249                 preview_btn->setMaximumSize(20, 17);
 250                 preview_btn->setText(QString::fromStdString(to_string(i + 1)));
 251                 ui->preview_layout->addWidget(preview_btn);
 252
 253                 displays.emplace_back(FrameAndDisplay{ frame, display, preview_btn });
 254
 255                 connect(display, &JPEGFrameView::clicked, preview_btn, &QPushButton::click);
 256                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 257                 connect(shortcut, &QShortcut::activated, preview_btn, &QPushButton::click);
 258
 259                 connect(preview_btn, &QPushButton::clicked, [this, i] { preview_angle_clicked(i); });
 260         }
 261
 262         cliplist_clips->change_num_cameras(num_cameras);
 263         playlist_clips->change_num_cameras(num_cameras);
 264
 265         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 266 }
 267
 268 MainWindow::~MainWindow()
 269 {
 270         // Empty so that we can forward-declare Player in the .h file.
 271 }
 272
 273 void MainWindow::cue_in_clicked()
 274 {
 275         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 276                 cliplist_clips->mutable_back()->pts_in = current_pts;
 277         } else {
 278                 Clip clip;
 279                 clip.pts_in = max<int64_t>(current_pts - lrint(global_flags.cue_point_padding_seconds * TIMEBASE), 0);
 280                 cliplist_clips->add_clip(clip);
 281                 playlist_selection_changed();
 282         }
 283
 284         // Select the item so that we can jog it.
 285         ui->clip_list->setFocus();
 286         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::IN));
 287         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 288         ui->clip_list->scrollToBottom();
 289         enable_or_disable_queue_button();
 290 }
 291
 292 void MainWindow::cue_out_clicked()
 293 {
 294         if (cliplist_clips->empty()) {
 295                 return;
 296         }
 297
 298         cliplist_clips->mutable_back()->pts_out = current_pts + lrint(global_flags.cue_point_padding_seconds * TIMEBASE);
 299
 300         // Select the item so that we can jog it.
 301         ui->clip_list->setFocus();
 302         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::OUT));
 303         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 304         ui->clip_list->scrollToBottom();
 305         enable_or_disable_queue_button();
 306 }
 307
 308 void MainWindow::queue_clicked()
 309 {
 310         // See also enable_or_disable_queue_button().
 311
 312         if (cliplist_clips->empty()) {
 313                 return;
 314         }
 315
 316         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 317         if (!selected->hasSelection()) {
 318                 Clip clip = *cliplist_clips->back();
 319                 clip.stream_idx = 0;
 320                 if (clip.pts_out != -1) {
 321                         playlist_clips->add_clip(clip);
 322                         playlist_selection_changed();
 323                         ui->playlist->scrollToBottom();
 324                 }
 325                 return;
 326         }
 327
 328         QModelIndex index = selected->currentIndex();
 329         Clip clip = *cliplist_clips->clip(index.row());
 330         if (cliplist_clips->is_camera_column(index.column())) {
 331                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 332         } else {
 333                 clip.stream_idx = ui->preview_display->get_stream_idx();
 334         }
 335
 336         if (clip.pts_out != -1) {
 337                 playlist_clips->add_clip(clip);
 338                 playlist_selection_changed();
 339                 ui->playlist->scrollToBottom();
 340                 if (!ui->playlist->selectionModel()->hasSelection()) {
 341                         // TODO: Figure out why this doesn't always seem to actually select the row.
 342                         QModelIndex bottom = playlist_clips->index(playlist_clips->size() - 1, 0);
 343                         ui->playlist->setCurrentIndex(bottom);
 344                 }
 345         }
 346 }
 347
 348 void MainWindow::preview_clicked()
 349 {
 350         // See also enable_or_disable_preview_button().
 351
 352         if (ui->playlist->hasFocus()) {
 353                 // Allow the playlist as preview iff it has focus and something is selected.
 354                 QItemSelectionModel *selected = ui->playlist->selectionModel();
 355                 if (selected->hasSelection()) {
 356                         QModelIndex index = selected->currentIndex();
 357                         const Clip &clip = *playlist_clips->clip(index.row());
 358                         preview_player->play(clip);
 359                         return;
 360                 }
 361         }
 362
 363         if (cliplist_clips->empty())
 364                 return;
 365
 366         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 367         if (!selected->hasSelection()) {
 368                 preview_player->play(*cliplist_clips->back());
 369                 return;
 370         }
 371
 372         QModelIndex index = selected->currentIndex();
 373         Clip clip = *cliplist_clips->clip(index.row());
 374         if (cliplist_clips->is_camera_column(index.column())) {
 375                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 376         } else {
 377                 clip.stream_idx = ui->preview_display->get_stream_idx();
 378         }
 379         preview_player->play(clip);
 380 }
 381
 382 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 383 {
 384         preview_player->override_angle(stream_idx);
 385
 386         // Change the selection if we were previewing a clip from the clip list.
 387         // (The only other thing we could be showing is a pts scrub, and if so,
 388         // that would be selected.)
 389         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 390         if (selected->hasSelection()) {
 391                 QModelIndex cell = selected->selectedIndexes()[0];
 392                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 393                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 394         }
 395 }
 396
 397 void MainWindow::playlist_duplicate()
 398 {
 399         QItemSelectionModel *selected = ui->playlist->selectionModel();
 400         if (!selected->hasSelection()) {
 401                 // Should have been grayed out, but OK.
 402                 return;
 403         }
 404         QModelIndexList rows = selected->selectedRows();
 405         int first = rows.front().row(), last = rows.back().row();
 406         playlist_clips->duplicate_clips(first, last);
 407         playlist_selection_changed();
 408 }
 409
 410 void MainWindow::playlist_remove()
 411 {
 412         QItemSelectionModel *selected = ui->playlist->selectionModel();
 413         if (!selected->hasSelection()) {
 414                 // Should have been grayed out, but OK.
 415                 return;
 416         }
 417         QModelIndexList rows = selected->selectedRows();
 418         int first = rows.front().row(), last = rows.back().row();
 419         playlist_clips->erase_clips(first, last);
 420
 421         // TODO: select the next one in the list?
 422
 423         playlist_selection_changed();
 424 }
 425
 426 void MainWindow::playlist_move(int delta)
 427 {
 428         QItemSelectionModel *selected = ui->playlist->selectionModel();
 429         if (!selected->hasSelection()) {
 430                 // Should have been grayed out, but OK.
 431                 return;
 432         }
 433
 434         QModelIndexList rows = selected->selectedRows();
 435         int first = rows.front().row(), last = rows.back().row();
 436         if ((delta == -1 && first == 0) ||
 437             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 438                 // Should have been grayed out, but OK.
 439                 return;
 440         }
 441
 442         playlist_clips->move_clips(first, last, delta);
 443         playlist_selection_changed();
 444 }
 445
 446 void MainWindow::defer_timer_expired()
 447 {
 448         state_changed(deferred_state);
 449 }
 450
 451 void MainWindow::content_changed()
 452 {
 453         // If we are playing, update the part of the playlist that's not playing yet.
 454         vector<ClipWithID> clips;
 455         for (unsigned row = 0; row < playlist_clips->size(); ++row) {
 456                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 457         }
 458         live_player->splice_play(clips);
 459
 460         // Serialize the state.
 461         if (defer_timeout->isActive() &&
 462             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 463                 // There's some deferred event waiting, but this event is unrelated.
 464                 // So it's time to short-circuit that timer and do the work it wanted to do.
 465                 defer_timeout->stop();
 466                 state_changed(deferred_state);
 467         }
 468         StateProto state;
 469         *state.mutable_clip_list() = cliplist_clips->serialize();
 470         *state.mutable_play_list() = playlist_clips->serialize();
 471         if (currently_deferring_model_changes) {
 472                 deferred_change_id = current_change_id;
 473                 deferred_state = std::move(state);
 474                 defer_timeout->start(200);
 475                 return;
 476         }
 477         state_changed(state);
 478 }
 479
 480 void MainWindow::state_changed(const StateProto &state)
 481 {
 482         db.store_state(state);
 483
 484         redo_stack.clear();
 485         ui->redo_action->setEnabled(false);
 486
 487         undo_stack.push_back(state);
 488         ui->undo_action->setEnabled(undo_stack.size() > 1);
 489
 490         // Make sure it doesn't grow without bounds.
 491         while (undo_stack.size() >= 100) {
 492                 undo_stack.pop_front();
 493         }
 494 }
 495
 496 void MainWindow::save_settings()
 497 {
 498         SettingsProto settings;
 499         settings.set_interpolation_quality(global_flags.interpolation_quality + 1);
 500         settings.set_cue_point_padding_seconds(global_flags.cue_point_padding_seconds);
 501         db.store_settings(settings);
 502 }
 503
 504 void MainWindow::play_clicked()
 505 {
 506         if (playlist_clips->empty())
 507                 return;
 508
 509         QItemSelectionModel *selected = ui->playlist->selectionModel();
 510         unsigned start_row;
 511         if (!selected->hasSelection()) {
 512                 start_row = 0;
 513         } else {
 514                 start_row = selected->selectedRows(0)[0].row();
 515         }
 516
 517         vector<ClipWithID> clips;
 518         for (unsigned row = start_row; row < playlist_clips->size(); ++row) {
 519                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 520         }
 521         live_player->play(clips);
 522         playlist_clips->set_progress({ { start_row, 0.0f } });
 523         ui->playlist->selectionModel()->clear();
 524         playlist_selection_changed();
 525
 526         ui->stop_btn->setEnabled(true);
 527 }
 528
 529 void MainWindow::stop_clicked()
 530 {
 531         Clip fake_clip;
 532         fake_clip.pts_in = 0;
 533         fake_clip.pts_out = 0;
 534         playlist_clips->set_progress({});
 535         live_player->play(fake_clip);
 536         ui->stop_btn->setEnabled(false);
 537 }
 538
 539 void MainWindow::live_player_done()
 540 {
 541         playlist_selection_changed();
 542         playlist_clips->set_progress({});
 543         ui->stop_btn->setEnabled(false);
 544 }
 545
 546 void MainWindow::live_player_clip_progress(const map<uint64_t, double> &progress, double time_remaining)
 547 {
 548         playlist_clips->set_progress(progress);
 549         set_output_status(format_duration(time_remaining) + " left");
 550 }
 551
 552 void MainWindow::resizeEvent(QResizeEvent *event)
 553 {
 554         QMainWindow::resizeEvent(event);
 555
 556         // Ask for a relayout, but only after the event loop is done doing relayout
 557         // on everything else.
 558         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 559 }
 560
 561 void MainWindow::relayout()
 562 {
 563         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 564         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 565 }
 566
 567 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
 568 {
 569         pts = std::max<int64_t>(pts, 0);
 570         if (clip->pts_out == -1) {
 571                 pts = std::min(pts, current_pts);
 572         } else {
 573                 pts = std::min(pts, clip->pts_out);
 574         }
 575         clip->pts_in = pts;
 576 }
 577
 578 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 579 {
 580         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 581         constexpr int camera_degrees_per_pixel = 15;  // One click of most mice.
 582         int scrub_sensitivity = 100;  // pts units per pixel.
 583         int wheel_sensitivity = 100;  // pts units per degree.
 584
 585         if (event->type() == QEvent::FocusIn || event->type() == QEvent::FocusOut) {
 586                 enable_or_disable_preview_button();
 587         }
 588
 589         unsigned stream_idx = ui->preview_display->get_stream_idx();
 590
 591         if (watched == ui->clip_list) {
 592                 if (event->type() == QEvent::FocusOut) {
 593                         highlight_camera_input(-1);
 594                 }
 595                 return false;
 596         }
 597
 598         if (event->type() != QEvent::Wheel) {
 599                 last_mousewheel_camera_row = -1;
 600         }
 601
 602         if (event->type() == QEvent::MouseButtonPress) {
 603                 QMouseEvent *mouse = (QMouseEvent *)event;
 604
 605                 QTableView *destination;
 606                 ScrubType type;
 607
 608                 if (watched == ui->clip_list->viewport()) {
 609                         destination = ui->clip_list;
 610                         type = SCRUBBING_CLIP_LIST;
 611                 } else if (watched == ui->playlist->viewport()) {
 612                         destination = ui->playlist;
 613                         type = SCRUBBING_PLAYLIST;
 614                 } else {
 615                         return false;
 616                 }
 617                 int column = destination->columnAt(mouse->x());
 618                 int row = destination->rowAt(mouse->y());
 619                 if (column == -1 || row == -1)
 620                         return false;
 621
 622                 if (type == SCRUBBING_CLIP_LIST) {
 623                         if (ClipList::Column(column) == ClipList::Column::IN) {
 624                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 625                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 626                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 627                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 628                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 629                         } else {
 630                                 return false;
 631                         }
 632                 } else {
 633                         if (PlayList::Column(column) == PlayList::Column::IN) {
 634                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 635                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 636                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 637                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 638                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 639                         } else {
 640                                 return false;
 641                         }
 642                 }
 643
 644                 scrubbing = true;
 645                 scrub_row = row;
 646                 scrub_column = column;
 647                 scrub_x_origin = mouse->x();
 648                 scrub_type = type;
 649         } else if (event->type() == QEvent::MouseMove) {
 650                 QMouseEvent *mouse = (QMouseEvent *)event;
 651                 if (mouse->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 652                         scrub_sensitivity *= 10;
 653                         wheel_sensitivity *= 10;
 654                 }
 655                 if (mouse->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 656                         scrub_sensitivity /= 10;
 657                         wheel_sensitivity /= 10;
 658                 }
 659                 if (scrubbing) {
 660                         int offset = mouse->x() - scrub_x_origin;
 661                         int adjusted_offset;
 662                         if (offset >= dead_zone_pixels) {
 663                                 adjusted_offset = offset - dead_zone_pixels;
 664                         } else if (offset < -dead_zone_pixels) {
 665                                 adjusted_offset = offset + dead_zone_pixels;
 666                         } else {
 667                                 adjusted_offset = 0;
 668                         }
 669
 670                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 671                         currently_deferring_model_changes = true;
 672                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 673                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 674                                 if (scrub_column == int(ClipList::Column::IN)) {
 675                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 676                                         set_pts_in(pts, current_pts, clip);
 677                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 678                                 } else {
 679                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 680                                         pts = std::max(pts, clip->pts_in);
 681                                         pts = std::min(pts, current_pts);
 682                                         clip->pts_out = pts;
 683                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 684                                 }
 685                         } else {
 686                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 687                                 if (scrub_column == int(PlayList::Column::IN)) {
 688                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 689                                         set_pts_in(pts, current_pts, clip);
 690                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 691                                 } else {
 692                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 693                                         pts = std::max(pts, clip->pts_in);
 694                                         pts = std::min(pts, current_pts);
 695                                         clip->pts_out = pts;
 696                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 697                                 }
 698                         }
 699                         currently_deferring_model_changes = false;
 700
 701                         return true;  // Don't use this mouse movement for selecting things.
 702                 }
 703         } else if (event->type() == QEvent::Wheel) {
 704                 QWheelEvent *wheel = (QWheelEvent *)event;
 705                 int angle_delta = wheel->angleDelta().y();
 706                 if (wheel->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 707                         scrub_sensitivity *= 10;
 708                         wheel_sensitivity *= 10;
 709                 }
 710                 if (wheel->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 711                         scrub_sensitivity /= 10;
 712                         wheel_sensitivity /= 10;
 713                         angle_delta = wheel->angleDelta().x();  // Qt ickiness.
 714                 }
 715
 716                 QTableView *destination;
 717                 int in_column, out_column, camera_column;
 718                 if (watched == ui->clip_list->viewport()) {
 719                         destination = ui->clip_list;
 720                         in_column = int(ClipList::Column::IN);
 721                         out_column = int(ClipList::Column::OUT);
 722                         camera_column = -1;
 723                         last_mousewheel_camera_row = -1;
 724                 } else if (watched == ui->playlist->viewport()) {
 725                         destination = ui->playlist;
 726                         in_column = int(PlayList::Column::IN);
 727                         out_column = int(PlayList::Column::OUT);
 728                         camera_column = int(PlayList::Column::CAMERA);
 729                 } else {
 730                         last_mousewheel_camera_row = -1;
 731                         return false;
 732                 }
 733                 int column = destination->columnAt(wheel->x());
 734                 int row = destination->rowAt(wheel->y());
 735                 if (column == -1 || row == -1)
 736                         return false;
 737
 738                 // Only adjust pts with the wheel if the given row is selected.
 739                 if (!destination->hasFocus() ||
 740                     row != destination->selectionModel()->currentIndex().row()) {
 741                         return false;
 742                 }
 743
 744                 currently_deferring_model_changes = true;
 745                 {
 746                         current_change_id = (watched == ui->clip_list->viewport()) ? "cliplist:" : "playlist:";
 747                         ClipProxy clip = (watched == ui->clip_list->viewport()) ? cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 748                         if (watched == ui->playlist->viewport()) {
 749                                 stream_idx = clip->stream_idx;
 750                         }
 751
 752                         if (column != camera_column) {
 753                                 last_mousewheel_camera_row = -1;
 754                         }
 755                         if (column == in_column) {
 756                                 current_change_id += "in:" + to_string(row);
 757                                 int64_t pts = clip->pts_in + angle_delta * wheel_sensitivity;
 758                                 set_pts_in(pts, current_pts, clip);
 759                                 preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 760                         } else if (column == out_column) {
 761                                 current_change_id += "out:" + to_string(row);
 762                                 int64_t pts = clip->pts_out + angle_delta * wheel_sensitivity;
 763                                 pts = std::max(pts, clip->pts_in);
 764                                 pts = std::min(pts, current_pts);
 765                                 clip->pts_out = pts;
 766                                 preview_single_frame(pts, stream_idx, LAST_BEFORE);
 767                         } else if (column == camera_column) {
 768                                 current_change_id += "camera:" + to_string(row);
 769                                 int angle_degrees = angle_delta;
 770                                 if (last_mousewheel_camera_row == row) {
 771                                         angle_degrees += leftover_angle_degrees;
 772                                 }
 773
 774                                 int stream_idx = clip->stream_idx + angle_degrees / camera_degrees_per_pixel;
 775                                 stream_idx = std::max(stream_idx, 0);
 776                                 stream_idx = std::min<int>(stream_idx, num_cameras - 1);
 777                                 clip->stream_idx = stream_idx;
 778
 779                                 last_mousewheel_camera_row = row;
 780                                 leftover_angle_degrees = angle_degrees % camera_degrees_per_pixel;
 781
 782                                 // Don't update the live view, that's rarely what the operator wants.
 783                         }
 784                 }
 785                 currently_deferring_model_changes = false;
 786                 return true;  // Don't scroll.
 787         } else if (event->type() == QEvent::MouseButtonRelease) {
 788                 scrubbing = false;
 789         }
 790         return false;
 791 }
 792
 793 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 794 {
 795         if (rounding == LAST_BEFORE) {
 796                 lock_guard<mutex> lock(frame_mu);
 797                 if (frames[stream_idx].empty())
 798                         return;
 799                 auto it = find_last_frame_before(frames[stream_idx], pts);
 800                 if (it != frames[stream_idx].end()) {
 801                         pts = it->pts;
 802                 }
 803         } else {
 804                 assert(rounding == FIRST_AT_OR_AFTER);
 805                 lock_guard<mutex> lock(frame_mu);
 806                 if (frames[stream_idx].empty())
 807                         return;
 808                 auto it = find_first_frame_at_or_after(frames[stream_idx], pts);
 809                 if (it != frames[stream_idx].end()) {
 810                         pts = it->pts;
 811                 }
 812         }
 813
 814         Clip fake_clip;
 815         fake_clip.pts_in = pts;
 816         fake_clip.pts_out = pts + 1;
 817         fake_clip.stream_idx = stream_idx;
 818         preview_player->play(fake_clip);
 819 }
 820
 821 void MainWindow::playlist_selection_changed()
 822 {
 823         enable_or_disable_preview_button();
 824
 825         QItemSelectionModel *selected = ui->playlist->selectionModel();
 826         bool any_selected = selected->hasSelection();
 827         ui->playlist_duplicate_btn->setEnabled(any_selected);
 828         ui->playlist_remove_btn->setEnabled(any_selected);
 829         ui->playlist_move_up_btn->setEnabled(
 830                 any_selected && selected->selectedRows().front().row() > 0);
 831         ui->playlist_move_down_btn->setEnabled(
 832                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 833         ui->play_btn->setEnabled(!playlist_clips->empty());
 834
 835         if (!any_selected) {
 836                 set_output_status("paused");
 837         } else {
 838                 vector<ClipWithID> clips;
 839                 for (size_t row = selected->selectedRows().front().row(); row < playlist_clips->size(); ++row) {
 840                         clips.emplace_back(*playlist_clips->clip_with_id(row));
 841                 }
 842                 double remaining = compute_total_time(clips);
 843                 set_output_status(format_duration(remaining) + " ready");
 844         }
 845 }
 846
 847 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &)
 848 {
 849         int camera_selected = -1;
 850         if (cliplist_clips->is_camera_column(current.column())) {
 851                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 852         }
 853         highlight_camera_input(camera_selected);
 854         enable_or_disable_queue_button();
 855 }
 856
 857 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 858 {
 859         char time_str[256];
 860         if (estimated_seconds_left < 60.0) {
 861                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 862         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 863                 int s = lrintf(estimated_seconds_left);
 864                 int m = s / 60;
 865                 s %= 60;
 866                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 867         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 868                 int m = lrintf(estimated_seconds_left / 60.0);
 869                 snprintf(time_str, sizeof(time_str), "%dm", m);
 870         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 871                 int m = lrintf(estimated_seconds_left / 60.0);
 872                 int h = m / 60;
 873                 m %= 60;
 874                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 875         } else {  // More than ten hours: Xh.
 876                 int h = lrintf(estimated_seconds_left / 3600.0);
 877                 snprintf(time_str, sizeof(time_str), "%dh", h);
 878         }
 879         char buf[256];
 880         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 881
 882         std::string label = buf;
 883
 884         post_to_main_thread([this, label] {
 885                 disk_free_label->setText(QString::fromStdString(label));
 886                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 887         });
 888 }
 889
 890 void MainWindow::exit_triggered()
 891 {
 892         close();
 893 }
 894
 895 void MainWindow::export_cliplist_clip_multitrack_triggered()
 896 {
 897         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 898         if (!selected->hasSelection()) {
 899                 QMessageBox msgbox;
 900                 msgbox.setText("No clip selected in the clip list. Select one and try exporting again.");
 901                 msgbox.exec();
 902                 return;
 903         }
 904
 905         QModelIndex index = selected->currentIndex();
 906         Clip clip = *cliplist_clips->clip(index.row());
 907         QString filename = QFileDialog::getSaveFileName(this,
 908                 "Export multitrack clip", QString(), tr("Matroska video files (*.mkv)"));
 909         if (filename.isNull()) {
 910                 // Cancel.
 911                 return;
 912         }
 913         if (!filename.endsWith(".mkv")) {
 914                 filename += ".mkv";
 915         }
 916         export_multitrack_clip(filename.toStdString(), clip);
 917 }
 918
 919 void MainWindow::export_playlist_clip_interpolated_triggered()
 920 {
 921         QItemSelectionModel *selected = ui->playlist->selectionModel();
 922         if (!selected->hasSelection()) {
 923                 QMessageBox msgbox;
 924                 msgbox.setText("No clip selected in the playlist. Select one and try exporting again.");
 925                 msgbox.exec();
 926                 return;
 927         }
 928
 929         QString filename = QFileDialog::getSaveFileName(this,
 930                 "Export interpolated clip", QString(), tr("Matroska video files (*.mkv)"));
 931         if (filename.isNull()) {
 932                 // Cancel.
 933                 return;
 934         }
 935         if (!filename.endsWith(".mkv")) {
 936                 filename += ".mkv";
 937         }
 938
 939         vector<Clip> clips;
 940         QModelIndexList rows = selected->selectedRows();
 941         for (QModelIndex index : rows) {
 942                 clips.push_back(*playlist_clips->clip(index.row()));
 943         }
 944         export_interpolated_clip(filename.toStdString(), clips);
 945 }
 946
 947 void MainWindow::manual_triggered()
 948 {
 949         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 950                 QMessageBox msgbox;
 951                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 952                 msgbox.exec();
 953         }
 954 }
 955
 956 void MainWindow::about_triggered()
 957 {
 958         AboutDialog("Futatabi", "Multicamera slow motion video server").exec();
 959 }
 960
 961 void MainWindow::undo_triggered()
 962 {
 963         // Finish any deferred action.
 964         if (defer_timeout->isActive()) {
 965                 defer_timeout->stop();
 966                 state_changed(deferred_state);
 967         }
 968
 969         StateProto redo_state;
 970         *redo_state.mutable_clip_list() = cliplist_clips->serialize();
 971         *redo_state.mutable_play_list() = playlist_clips->serialize();
 972         redo_stack.push_back(std::move(redo_state));
 973         ui->redo_action->setEnabled(true);
 974
 975         assert(undo_stack.size() > 1);
 976
 977         // Pop off the current state, which is always at the top of the stack.
 978         undo_stack.pop_back();
 979
 980         StateProto state = undo_stack.back();
 981         ui->undo_action->setEnabled(undo_stack.size() > 1);
 982
 983         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
 984         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
 985
 986         db.store_state(state);
 987 }
 988
 989 void MainWindow::redo_triggered()
 990 {
 991         assert(!redo_stack.empty());
 992
 993         ui->undo_action->setEnabled(true);
 994         ui->redo_action->setEnabled(true);
 995
 996         undo_stack.push_back(std::move(redo_stack.back()));
 997         redo_stack.pop_back();
 998         ui->undo_action->setEnabled(true);
 999         ui->redo_action->setEnabled(!redo_stack.empty());
1000
1001         const StateProto &state = undo_stack.back();
1002         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
1003         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
1004
1005         db.store_state(state);
1006 }
1007
1008 void MainWindow::quality_toggled(int quality, bool checked)
1009 {
1010         if (!checked) {
1011                 return;
1012         }
1013         global_flags.interpolation_quality = quality;
1014         if (quality != 0 &&  // Turning interpolation off is always possible.
1015             quality != flow_initialized_interpolation_quality) {
1016                 QMessageBox msgbox;
1017                 msgbox.setText(QString::fromStdString(
1018                         "The interpolation quality for the main output cannot be changed at runtime, "
1019                         "except being turned completely off; it will take effect for exported files "
1020                         "only until next restart. The live output quality thus remains at " +
1021                         to_string(flow_initialized_interpolation_quality) + "."));
1022                 msgbox.exec();
1023         }
1024
1025         save_settings();
1026 }
1027
1028 void MainWindow::padding_toggled(double seconds, bool checked)
1029 {
1030         if (!checked) {
1031                 return;
1032         }
1033         global_flags.cue_point_padding_seconds = seconds;
1034         save_settings();
1035 }
1036
1037 void MainWindow::highlight_camera_input(int stream_idx)
1038 {
1039         for (unsigned i = 0; i < num_cameras; ++i) {
1040                 if (unsigned(stream_idx) == i) {
1041                         displays[i].frame->setStyleSheet("background: rgb(0,255,0)");
1042                 } else {
1043                         displays[i].frame->setStyleSheet("");
1044                 }
1045         }
1046 }
1047
1048 void MainWindow::enable_or_disable_preview_button()
1049 {
1050         // Follows the logic in preview_clicked().
1051
1052         if (ui->playlist->hasFocus()) {
1053                 // Allow the playlist as preview iff it has focus and something is selected.
1054                 // TODO: Is this part really relevant?
1055                 QItemSelectionModel *selected = ui->playlist->selectionModel();
1056                 if (selected->hasSelection()) {
1057                         ui->preview_btn->setEnabled(true);
1058                         return;
1059                 }
1060         }
1061
1062         // TODO: Perhaps only enable this if something is actually selected.
1063         ui->preview_btn->setEnabled(!cliplist_clips->empty());
1064 }
1065
1066 void MainWindow::enable_or_disable_queue_button()
1067 {
1068         // Follows the logic in queue_clicked().
1069         // TODO: Perhaps only enable this if something is actually selected.
1070
1071         bool enabled;
1072
1073         if (cliplist_clips->empty()) {
1074                 enabled = false;
1075         } else {
1076                 QItemSelectionModel *selected = ui->clip_list->selectionModel();
1077                 if (!selected->hasSelection()) {
1078                         Clip clip = *cliplist_clips->back();
1079                         enabled = clip.pts_out != -1;
1080                 } else {
1081                         QModelIndex index = selected->currentIndex();
1082                         Clip clip = *cliplist_clips->clip(index.row());
1083                         enabled = clip.pts_out != -1;
1084                 }
1085         }
1086
1087         ui->queue_btn->setEnabled(enabled);
1088 }
1089
1090 void MainWindow::set_output_status(const string &status)
1091 {
1092         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
1093         if (live_player != nullptr) {
1094                 live_player->set_pause_status(status);
1095         }
1096
1097         lock_guard<mutex> lock(queue_status_mu);
1098         queue_status = status;
1099 }
1100
1101 pair<string, string> MainWindow::get_queue_status() const
1102 {
1103         lock_guard<mutex> lock(queue_status_mu);
1104         return { queue_status, "text/plain" };
1105 }
1106
1107 void MainWindow::display_frame(unsigned stream_idx, const FrameOnDisk &frame)
1108 {
1109         if (stream_idx >= MAX_STREAMS) {
1110                 fprintf(stderr, "WARNING: Ignoring too-high stream index %u.\n", stream_idx);
1111                 return;
1112         }
1113         if (stream_idx >= num_cameras) {
1114                 post_to_main_thread_and_wait([this, stream_idx] {
1115                         num_cameras = stream_idx + 1;
1116                         change_num_cameras();
1117                 });
1118         }
1119         displays[stream_idx].display->setFrame(stream_idx, frame);
1120 }
1121
1122 template<class Model>
1123 void MainWindow::replace_model(QTableView *view, Model **model, Model *new_model)
1124 {
1125         QItemSelectionModel *old_selection_model = view->selectionModel();
1126         view->setModel(new_model);
1127         delete *model;
1128         delete old_selection_model;
1129         *model = new_model;
1130         connect(new_model, &Model::any_content_changed, this, &MainWindow::content_changed);
1131 }
1132
1133 void MainWindow::start_tally()
1134 {
1135         http_reply = http.get(QNetworkRequest(QString::fromStdString(global_flags.tally_url)));
1136         connect(http_reply, &QNetworkReply::finished, this, &MainWindow::tally_received);
1137 }
1138
1139 void MainWindow::tally_received()
1140 {
1141         unsigned time_to_next_tally_ms;
1142         if (http_reply->error()) {
1143                 fprintf(stderr, "HTTP get of '%s' failed: %s\n", global_flags.tally_url.c_str(),
1144                         http_reply->errorString().toStdString().c_str());
1145                 ui->live_frame->setStyleSheet("");
1146                 time_to_next_tally_ms = 1000;
1147         } else {
1148                 string contents = http_reply->readAll().toStdString();
1149                 ui->live_frame->setStyleSheet(QString::fromStdString("background: " + contents));
1150                 time_to_next_tally_ms = 100;
1151         }
1152         http_reply->deleteLater();
1153         http_reply = nullptr;
1154
1155         QTimer::singleShot(time_to_next_tally_ms, this, &MainWindow::start_tally);
1156 }