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 "futatabi_midi_mapping.pb.h"
   9 #include "shared/aboutdialog.h"
  10 #include "shared/disk_space_estimator.h"
  11 #include "shared/post_to_main_thread.h"
  12 #include "shared/timebase.h"
  13 #include "ui_mainwindow.h"
  14
  15 #include <QDesktopServices>
  16 #include <QFileDialog>
  17 #include <QMessageBox>
  18 #include <QMouseEvent>
  19 #include <QNetworkReply>
  20 #include <QShortcut>
  21 #include <QTimer>
  22 #include <QWheelEvent>
  23 #include <future>
  24 #include <sqlite3.h>
  25 #include <string>
  26 #include <vector>
  27
  28 using namespace std;
  29 using namespace std::placeholders;
  30
  31 MainWindow *global_mainwindow = nullptr;
  32 static ClipList *cliplist_clips;
  33 static PlayList *playlist_clips;
  34
  35 extern int64_t current_pts;
  36
  37 namespace {
  38
  39 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
  40 {
  41         pts = std::max<int64_t>(pts, 0);
  42         if (clip->pts_out == -1) {
  43                 pts = std::min(pts, current_pts);
  44         } else {
  45                 pts = std::min(pts, clip->pts_out);
  46         }
  47         clip->pts_in = pts;
  48 }
  49
  50 }  // namespace
  51
  52 MainWindow::MainWindow()
  53         : ui(new Ui::MainWindow),
  54           db(global_flags.working_directory + "/futatabi.db"),
  55           midi_mapper(this)
  56 {
  57         global_mainwindow = this;
  58         ui->setupUi(this);
  59
  60         // Load settings from database.
  61         SettingsProto settings = db.get_settings();
  62         if (!global_flags.interpolation_quality_set) {
  63                 if (settings.interpolation_quality() != 0) {
  64                         global_flags.interpolation_quality = settings.interpolation_quality() - 1;
  65                 }
  66         }
  67         if (!global_flags.cue_point_padding_set) {
  68                 global_flags.cue_point_padding_seconds = settings.cue_point_padding_seconds();  // Default 0 is fine.
  69         }
  70         if (global_flags.interpolation_quality == 0) {
  71                 // Allocate something just for simplicity; we won't be using it
  72                 // unless the user changes runtime, in which case 1 is fine.
  73                 flow_initialized_interpolation_quality = 1;
  74         } else {
  75                 flow_initialized_interpolation_quality = global_flags.interpolation_quality;
  76         }
  77         save_settings();
  78
  79         // The menus.
  80         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  81         connect(ui->export_cliplist_clip_multitrack_action, &QAction::triggered, this, &MainWindow::export_cliplist_clip_multitrack_triggered);
  82         connect(ui->export_playlist_clip_interpolated_action, &QAction::triggered, this, &MainWindow::export_playlist_clip_interpolated_triggered);
  83         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
  84         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
  85         connect(ui->undo_action, &QAction::triggered, this, &MainWindow::undo_triggered);
  86         connect(ui->redo_action, &QAction::triggered, this, &MainWindow::redo_triggered);
  87         ui->undo_action->setEnabled(false);
  88         ui->redo_action->setEnabled(false);
  89
  90         // The quality group.
  91         QActionGroup *quality_group = new QActionGroup(ui->interpolation_menu);
  92         quality_group->addAction(ui->quality_0_action);
  93         quality_group->addAction(ui->quality_1_action);
  94         quality_group->addAction(ui->quality_2_action);
  95         quality_group->addAction(ui->quality_3_action);
  96         quality_group->addAction(ui->quality_4_action);
  97         if (global_flags.interpolation_quality == 0) {
  98                 ui->quality_0_action->setChecked(true);
  99         } else if (global_flags.interpolation_quality == 1) {
 100                 ui->quality_1_action->setChecked(true);
 101         } else if (global_flags.interpolation_quality == 2) {
 102                 ui->quality_2_action->setChecked(true);
 103         } else if (global_flags.interpolation_quality == 3) {
 104                 ui->quality_3_action->setChecked(true);
 105         } else if (global_flags.interpolation_quality == 4) {
 106                 ui->quality_4_action->setChecked(true);
 107         } else {
 108                 assert(false);
 109         }
 110         connect(ui->quality_0_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 0, _1));
 111         connect(ui->quality_1_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 1, _1));
 112         connect(ui->quality_2_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 2, _1));
 113         connect(ui->quality_3_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 3, _1));
 114         connect(ui->quality_4_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 4, _1));
 115
 116         // The cue point padding group.
 117         QActionGroup *padding_group = new QActionGroup(ui->interpolation_menu);
 118         padding_group->addAction(ui->padding_0_action);
 119         padding_group->addAction(ui->padding_1_action);
 120         padding_group->addAction(ui->padding_2_action);
 121         padding_group->addAction(ui->padding_5_action);
 122         if (global_flags.cue_point_padding_seconds <= 1e-3) {
 123                 ui->padding_0_action->setChecked(true);
 124         } else if (fabs(global_flags.cue_point_padding_seconds - 1.0) < 1e-3) {
 125                 ui->padding_1_action->setChecked(true);
 126         } else if (fabs(global_flags.cue_point_padding_seconds - 2.0) < 1e-3) {
 127                 ui->padding_2_action->setChecked(true);
 128         } else if (fabs(global_flags.cue_point_padding_seconds - 5.0) < 1e-3) {
 129                 ui->padding_5_action->setChecked(true);
 130         } else {
 131                 // Nothing to check, which is fine.
 132         }
 133         connect(ui->padding_0_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 0.0, _1));
 134         connect(ui->padding_1_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 1.0, _1));
 135         connect(ui->padding_2_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 2.0, _1));
 136         connect(ui->padding_5_action, &QAction::toggled, bind(&MainWindow::padding_toggled, this, 5.0, _1));
 137
 138         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 139         disk_free_label = new QLabel(this);
 140         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 141         ui->menuBar->setCornerWidget(disk_free_label);
 142
 143         StateProto state = db.get_state();
 144         undo_stack.push_back(state);  // The undo stack always has the current state on top.
 145
 146         cliplist_clips = new ClipList(state.clip_list());
 147         ui->clip_list->setModel(cliplist_clips);
 148         connect(cliplist_clips, &ClipList::any_content_changed, this, &MainWindow::content_changed);
 149
 150         playlist_clips = new PlayList(state.play_list());
 151         ui->playlist->setModel(playlist_clips);
 152         connect(playlist_clips, &PlayList::any_content_changed, this, &MainWindow::content_changed);
 153
 154         // For un-highlighting when we lose focus.
 155         ui->clip_list->installEventFilter(this);
 156
 157         // For scrubbing in the pts columns.
 158         ui->clip_list->viewport()->installEventFilter(this);
 159         ui->playlist->viewport()->installEventFilter(this);
 160
 161         QShortcut *cue_in = new QShortcut(QKeySequence(Qt::Key_A), this);
 162         connect(cue_in, &QShortcut::activated, ui->cue_in_btn, &QPushButton::click);
 163         connect(ui->cue_in_btn, &QPushButton::clicked, this, &MainWindow::cue_in_clicked);
 164
 165         QShortcut *cue_out = new QShortcut(QKeySequence(Qt::Key_S), this);
 166         connect(cue_out, &QShortcut::activated, ui->cue_out_btn, &QPushButton::click);
 167         connect(ui->cue_out_btn, &QPushButton::clicked, this, &MainWindow::cue_out_clicked);
 168
 169         QShortcut *queue = new QShortcut(QKeySequence(Qt::Key_Q), this);
 170         connect(queue, &QShortcut::activated, ui->queue_btn, &QPushButton::click);
 171         connect(ui->queue_btn, &QPushButton::clicked, this, &MainWindow::queue_clicked);
 172
 173         QShortcut *preview = new QShortcut(QKeySequence(Qt::Key_W), this);
 174         connect(preview, &QShortcut::activated, ui->preview_btn, &QPushButton::click);
 175         connect(ui->preview_btn, &QPushButton::clicked, this, &MainWindow::preview_clicked);
 176
 177         QShortcut *play = new QShortcut(QKeySequence(Qt::Key_Space), this);
 178         connect(play, &QShortcut::activated, ui->play_btn, &QPushButton::click);
 179         connect(ui->play_btn, &QPushButton::clicked, this, &MainWindow::play_clicked);
 180
 181         connect(ui->stop_btn, &QPushButton::clicked, this, &MainWindow::stop_clicked);
 182         ui->stop_btn->setEnabled(false);
 183
 184         connect(ui->speed_slider, &QAbstractSlider::valueChanged, this, &MainWindow::speed_slider_changed);
 185         connect(ui->speed_lock_btn, &QPushButton::clicked, this, &MainWindow::speed_lock_clicked);
 186
 187         connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 188
 189         connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
 190         QShortcut *delete_key = new QShortcut(QKeySequence(Qt::Key_Delete), ui->playlist);
 191         connect(delete_key, &QShortcut::activated, [this] {
 192                 if (ui->playlist->hasFocus()) {
 193                         playlist_remove();
 194                 }
 195         });
 196
 197         // TODO: support drag-and-drop.
 198         connect(ui->playlist_move_up_btn, &QPushButton::clicked, [this] { playlist_move(-1); });
 199         connect(ui->playlist_move_down_btn, &QPushButton::clicked, [this] { playlist_move(1); });
 200
 201         connect(ui->playlist->selectionModel(), &QItemSelectionModel::selectionChanged,
 202                 this, &MainWindow::playlist_selection_changed);
 203         playlist_selection_changed();  // First time set-up.
 204
 205         preview_player.reset(new Player(ui->preview_display, Player::NO_STREAM_OUTPUT));
 206         live_player.reset(new Player(ui->live_display, Player::HTTPD_STREAM_OUTPUT));
 207         live_player->set_done_callback([this] {
 208                 post_to_main_thread([this] {
 209                         live_player_done();
 210                 });
 211         });
 212         live_player->set_progress_callback([this](const map<uint64_t, double> &progress, double time_remaining) {
 213                 post_to_main_thread([this, progress, time_remaining] {
 214                         live_player_clip_progress(progress, time_remaining);
 215                 });
 216         });
 217         set_output_status("paused");
 218         enable_or_disable_queue_button();
 219
 220         defer_timeout = new QTimer(this);
 221         defer_timeout->setSingleShot(true);
 222         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 223         ui->undo_action->setEnabled(true);
 224
 225         connect(ui->clip_list->selectionModel(), &QItemSelectionModel::currentChanged,
 226                 this, &MainWindow::clip_list_selection_changed);
 227         enable_or_disable_queue_button();
 228
 229         // Find out how many cameras we have in the existing frames;
 230         // if none, we start with two cameras.
 231         num_cameras = 2;
 232         {
 233                 lock_guard<mutex> lock(frame_mu);
 234                 for (size_t stream_idx = 2; stream_idx < MAX_STREAMS; ++stream_idx) {
 235                         if (!frames[stream_idx].empty()) {
 236                                 num_cameras = stream_idx + 1;
 237                         }
 238                 }
 239         }
 240         change_num_cameras();
 241
 242         if (!global_flags.tally_url.empty()) {
 243                 start_tally();
 244         }
 245
 246         if (!global_flags.midi_mapping_filename.empty()) {
 247                 MIDIMappingProto midi_mapping;
 248                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 249                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 250                                 global_flags.midi_mapping_filename.c_str());
 251                         exit(1);
 252                 }
 253                 midi_mapper.set_midi_mapping(midi_mapping);
 254         }
 255         midi_mapper.refresh_lights();
 256         midi_mapper.start_thread();
 257 }
 258
 259 void MainWindow::change_num_cameras()
 260 {
 261         assert(num_cameras >= displays.size());  // We only add, never remove.
 262
 263         // Make new display rows.
 264         unsigned display_rows = (num_cameras + 1) / 2;
 265         ui->video_displays->setStretch(1, display_rows);
 266         for (unsigned i = displays.size(); i < num_cameras; ++i) {
 267                 QFrame *frame = new QFrame(this);
 268                 frame->setAutoFillBackground(true);
 269
 270                 QLayout *layout = new QGridLayout(frame);
 271                 frame->setLayout(layout);
 272                 layout->setContentsMargins(3, 3, 3, 3);
 273
 274                 JPEGFrameView *display = new JPEGFrameView(frame);
 275                 display->setAutoFillBackground(true);
 276                 layout->addWidget(display);
 277
 278                 ui->input_displays->addWidget(frame, i / 2, i % 2);
 279                 display->set_overlay(to_string(i + 1));
 280
 281                 QPushButton *preview_btn = new QPushButton(this);
 282                 preview_btn->setMaximumSize(20, 17);
 283                 preview_btn->setText(QString::fromStdString(to_string(i + 1)));
 284                 ui->preview_layout->addWidget(preview_btn);
 285
 286                 displays.emplace_back(FrameAndDisplay{ frame, display, preview_btn });
 287
 288                 connect(display, &JPEGFrameView::clicked, preview_btn, &QPushButton::click);
 289                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 290                 connect(shortcut, &QShortcut::activated, preview_btn, &QPushButton::click);
 291
 292                 connect(preview_btn, &QPushButton::clicked, [this, i] { preview_angle_clicked(i); });
 293         }
 294
 295         cliplist_clips->change_num_cameras(num_cameras);
 296         playlist_clips->change_num_cameras(num_cameras);
 297
 298         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 299 }
 300
 301 MainWindow::~MainWindow()
 302 {
 303         // Empty so that we can forward-declare Player in the .h file.
 304 }
 305
 306 void MainWindow::cue_in_clicked()
 307 {
 308         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 309                 cliplist_clips->mutable_back()->pts_in = current_pts;
 310         } else {
 311                 Clip clip;
 312                 clip.pts_in = max<int64_t>(current_pts - lrint(global_flags.cue_point_padding_seconds * TIMEBASE), 0);
 313                 cliplist_clips->add_clip(clip);
 314                 playlist_selection_changed();
 315         }
 316
 317         // Select the item so that we can jog it.
 318         ui->clip_list->setFocus();
 319         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::IN));
 320         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 321         ui->clip_list->scrollToBottom();
 322         enable_or_disable_queue_button();
 323 }
 324
 325 void MainWindow::cue_out_clicked()
 326 {
 327         if (cliplist_clips->empty()) {
 328                 return;
 329         }
 330
 331         cliplist_clips->mutable_back()->pts_out = current_pts + lrint(global_flags.cue_point_padding_seconds * TIMEBASE);
 332
 333         // Select the item so that we can jog it.
 334         ui->clip_list->setFocus();
 335         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::OUT));
 336         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 337         ui->clip_list->scrollToBottom();
 338         enable_or_disable_queue_button();
 339 }
 340
 341 void MainWindow::queue_clicked()
 342 {
 343         // See also enable_or_disable_queue_button().
 344
 345         if (cliplist_clips->empty()) {
 346                 return;
 347         }
 348
 349         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 350         if (!selected->hasSelection()) {
 351                 Clip clip = *cliplist_clips->back();
 352                 clip.stream_idx = 0;
 353                 if (clip.pts_out != -1) {
 354                         playlist_clips->add_clip(clip);
 355                         playlist_selection_changed();
 356                         ui->playlist->scrollToBottom();
 357                 }
 358                 return;
 359         }
 360
 361         QModelIndex index = selected->currentIndex();
 362         Clip clip = *cliplist_clips->clip(index.row());
 363         if (cliplist_clips->is_camera_column(index.column())) {
 364                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 365         } else {
 366                 clip.stream_idx = ui->preview_display->get_stream_idx();
 367         }
 368
 369         if (clip.pts_out != -1) {
 370                 playlist_clips->add_clip(clip);
 371                 playlist_selection_changed();
 372                 ui->playlist->scrollToBottom();
 373                 if (!ui->playlist->selectionModel()->hasSelection()) {
 374                         // TODO: Figure out why this doesn't always seem to actually select the row.
 375                         QModelIndex bottom = playlist_clips->index(playlist_clips->size() - 1, 0);
 376                         ui->playlist->setCurrentIndex(bottom);
 377                 }
 378         }
 379 }
 380
 381 void MainWindow::preview_clicked()
 382 {
 383         // See also enable_or_disable_preview_button().
 384
 385         if (ui->playlist->hasFocus()) {
 386                 // Allow the playlist as preview iff it has focus and something is selected.
 387                 QItemSelectionModel *selected = ui->playlist->selectionModel();
 388                 if (selected->hasSelection()) {
 389                         QModelIndex index = selected->currentIndex();
 390                         const Clip &clip = *playlist_clips->clip(index.row());
 391                         preview_player->play(clip);
 392                         return;
 393                 }
 394         }
 395
 396         if (cliplist_clips->empty())
 397                 return;
 398
 399         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 400         if (!selected->hasSelection()) {
 401                 preview_player->play(*cliplist_clips->back());
 402                 return;
 403         }
 404
 405         QModelIndex index = selected->currentIndex();
 406         Clip clip = *cliplist_clips->clip(index.row());
 407         if (cliplist_clips->is_camera_column(index.column())) {
 408                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 409         } else {
 410                 clip.stream_idx = ui->preview_display->get_stream_idx();
 411         }
 412         preview_player->play(clip);
 413 }
 414
 415 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 416 {
 417         preview_player->override_angle(stream_idx);
 418
 419         // Change the selection if we were previewing a clip from the clip list.
 420         // (The only other thing we could be showing is a pts scrub, and if so,
 421         // that would be selected.)
 422         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 423         if (selected->hasSelection()) {
 424                 QModelIndex cell = selected->selectedIndexes()[0];
 425                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 426                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 427         }
 428 }
 429
 430 void MainWindow::playlist_duplicate()
 431 {
 432         QItemSelectionModel *selected = ui->playlist->selectionModel();
 433         if (!selected->hasSelection()) {
 434                 // Should have been grayed out, but OK.
 435                 return;
 436         }
 437         QModelIndexList rows = selected->selectedRows();
 438         int first = rows.front().row(), last = rows.back().row();
 439         playlist_clips->duplicate_clips(first, last);
 440         playlist_selection_changed();
 441 }
 442
 443 void MainWindow::playlist_remove()
 444 {
 445         QItemSelectionModel *selected = ui->playlist->selectionModel();
 446         if (!selected->hasSelection()) {
 447                 // Should have been grayed out, but OK.
 448                 return;
 449         }
 450         QModelIndexList rows = selected->selectedRows();
 451         int first = rows.front().row(), last = rows.back().row();
 452         playlist_clips->erase_clips(first, last);
 453
 454         // TODO: select the next one in the list?
 455
 456         playlist_selection_changed();
 457 }
 458
 459 void MainWindow::playlist_move(int delta)
 460 {
 461         QItemSelectionModel *selected = ui->playlist->selectionModel();
 462         if (!selected->hasSelection()) {
 463                 // Should have been grayed out, but OK.
 464                 return;
 465         }
 466
 467         QModelIndexList rows = selected->selectedRows();
 468         int first = rows.front().row(), last = rows.back().row();
 469         if ((delta == -1 && first == 0) ||
 470             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 471                 // Should have been grayed out, but OK.
 472                 return;
 473         }
 474
 475         playlist_clips->move_clips(first, last, delta);
 476         playlist_selection_changed();
 477 }
 478
 479 void MainWindow::jog_internal(JogDestination jog_destination, int row, int column, int stream_idx, int pts_delta)
 480 {
 481         constexpr int camera_pts_per_pixel = 1500;  // One click of most mice (15 degrees), multiplied by the default wheel_sensitivity.
 482
 483         int in_column, out_column, camera_column;
 484         if (jog_destination == JOG_CLIP_LIST) {
 485                 in_column = int(ClipList::Column::IN);
 486                 out_column = int(ClipList::Column::OUT);
 487                 camera_column = -1;
 488         } else if (jog_destination == JOG_PLAYLIST) {
 489                 in_column = int(PlayList::Column::IN);
 490                 out_column = int(PlayList::Column::OUT);
 491                 camera_column = int(PlayList::Column::CAMERA);
 492         } else {
 493                 assert(false);
 494         }
 495
 496         currently_deferring_model_changes = true;
 497         {
 498                 current_change_id = (jog_destination == JOG_CLIP_LIST) ? "cliplist:" : "playlist:";
 499                 ClipProxy clip = (jog_destination == JOG_CLIP_LIST) ? cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 500                 if (jog_destination == JOG_PLAYLIST) {
 501                         stream_idx = clip->stream_idx;
 502                 }
 503
 504                 if (column == in_column) {
 505                         current_change_id += "in:" + to_string(row);
 506                         int64_t pts = clip->pts_in + pts_delta;
 507                         set_pts_in(pts, current_pts, clip);
 508                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 509                 } else if (column == out_column) {
 510                         current_change_id += "out:" + to_string(row);
 511                         int64_t pts = clip->pts_out + pts_delta;
 512                         pts = std::max(pts, clip->pts_in);
 513                         pts = std::min(pts, current_pts);
 514                         clip->pts_out = pts;
 515                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 516                 } else if (column == camera_column) {
 517                         current_change_id += "camera:" + to_string(row);
 518                         int angle_degrees = pts_delta;
 519                         if (last_mousewheel_camera_row == row) {
 520                                 angle_degrees += leftover_angle_degrees;
 521                         }
 522
 523                         int stream_idx = clip->stream_idx + angle_degrees / camera_pts_per_pixel;
 524                         stream_idx = std::max(stream_idx, 0);
 525                         stream_idx = std::min<int>(stream_idx, num_cameras - 1);
 526                         clip->stream_idx = stream_idx;
 527
 528                         last_mousewheel_camera_row = row;
 529                         leftover_angle_degrees = angle_degrees % camera_pts_per_pixel;
 530
 531                         // Don't update the live view, that's rarely what the operator wants.
 532                 }
 533         }
 534         currently_deferring_model_changes = false;
 535 }
 536
 537 void MainWindow::defer_timer_expired()
 538 {
 539         state_changed(deferred_state);
 540 }
 541
 542 void MainWindow::content_changed()
 543 {
 544         // If we are playing, update the part of the playlist that's not playing yet.
 545         vector<ClipWithID> clips;
 546         for (unsigned row = 0; row < playlist_clips->size(); ++row) {
 547                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 548         }
 549         live_player->splice_play(clips);
 550
 551         // Serialize the state.
 552         if (defer_timeout->isActive() &&
 553             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 554                 // There's some deferred event waiting, but this event is unrelated.
 555                 // So it's time to short-circuit that timer and do the work it wanted to do.
 556                 defer_timeout->stop();
 557                 state_changed(deferred_state);
 558         }
 559         StateProto state;
 560         *state.mutable_clip_list() = cliplist_clips->serialize();
 561         *state.mutable_play_list() = playlist_clips->serialize();
 562         if (currently_deferring_model_changes) {
 563                 deferred_change_id = current_change_id;
 564                 deferred_state = std::move(state);
 565                 defer_timeout->start(200);
 566                 return;
 567         }
 568         state_changed(state);
 569 }
 570
 571 void MainWindow::state_changed(const StateProto &state)
 572 {
 573         db.store_state(state);
 574
 575         redo_stack.clear();
 576         ui->redo_action->setEnabled(false);
 577
 578         undo_stack.push_back(state);
 579         ui->undo_action->setEnabled(undo_stack.size() > 1);
 580
 581         // Make sure it doesn't grow without bounds.
 582         while (undo_stack.size() >= 100) {
 583                 undo_stack.pop_front();
 584         }
 585 }
 586
 587 void MainWindow::save_settings()
 588 {
 589         SettingsProto settings;
 590         settings.set_interpolation_quality(global_flags.interpolation_quality + 1);
 591         settings.set_cue_point_padding_seconds(global_flags.cue_point_padding_seconds);
 592         db.store_settings(settings);
 593 }
 594
 595 void MainWindow::play_clicked()
 596 {
 597         if (playlist_clips->empty())
 598                 return;
 599
 600         QItemSelectionModel *selected = ui->playlist->selectionModel();
 601         unsigned start_row;
 602         if (!selected->hasSelection()) {
 603                 start_row = 0;
 604         } else {
 605                 start_row = selected->selectedRows(0)[0].row();
 606         }
 607
 608         vector<ClipWithID> clips;
 609         for (unsigned row = start_row; row < playlist_clips->size(); ++row) {
 610                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 611         }
 612         live_player->play(clips);
 613         playlist_clips->set_progress({ { start_row, 0.0f } });
 614         ui->playlist->selectionModel()->clear();
 615         playlist_selection_changed();
 616
 617         ui->stop_btn->setEnabled(true);
 618 }
 619
 620 void MainWindow::stop_clicked()
 621 {
 622         Clip fake_clip;
 623         fake_clip.pts_in = 0;
 624         fake_clip.pts_out = 0;
 625         playlist_clips->set_progress({});
 626         live_player->play(fake_clip);
 627         ui->stop_btn->setEnabled(false);
 628 }
 629
 630 void MainWindow::speed_slider_changed(int percent)
 631 {
 632         float speed = percent / 100.0f;
 633         ui->speed_lock_btn->setText(QString::fromStdString(" " + to_string(percent) + "%"));
 634         live_player->set_master_speed(speed);
 635 }
 636
 637 void MainWindow::speed_lock_clicked()
 638 {
 639         // TODO: Make for a less abrupt transition if we're not already at 100%.
 640         ui->speed_slider->setValue(100);  // Also actually sets the master speed and updates the label.
 641         ui->speed_slider->setEnabled(!ui->speed_lock_btn->isChecked());
 642         midi_mapper.set_locked(ui->speed_lock_btn->isChecked());
 643 }
 644
 645 void MainWindow::live_player_done()
 646 {
 647         playlist_selection_changed();
 648         playlist_clips->set_progress({});
 649         ui->stop_btn->setEnabled(false);
 650 }
 651
 652 void MainWindow::live_player_clip_progress(const map<uint64_t, double> &progress, double time_remaining)
 653 {
 654         playlist_clips->set_progress(progress);
 655         set_output_status(format_duration(time_remaining) + " left");
 656 }
 657
 658 void MainWindow::resizeEvent(QResizeEvent *event)
 659 {
 660         QMainWindow::resizeEvent(event);
 661
 662         // Ask for a relayout, but only after the event loop is done doing relayout
 663         // on everything else.
 664         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 665 }
 666
 667 void MainWindow::relayout()
 668 {
 669         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 670         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 671 }
 672
 673 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 674 {
 675         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 676         int scrub_sensitivity = 100;  // pts units per pixel.
 677         int wheel_sensitivity = 100;  // pts units per degree.
 678
 679         if (event->type() == QEvent::FocusIn || event->type() == QEvent::FocusOut) {
 680                 enable_or_disable_preview_button();
 681                 hidden_jog_column = -1;
 682         }
 683
 684         unsigned stream_idx = ui->preview_display->get_stream_idx();
 685
 686         if (watched == ui->clip_list) {
 687                 if (event->type() == QEvent::FocusOut) {
 688                         highlight_camera_input(-1);
 689                 }
 690                 return false;
 691         }
 692
 693         if (event->type() != QEvent::Wheel) {
 694                 last_mousewheel_camera_row = -1;
 695         }
 696
 697         if (event->type() == QEvent::MouseButtonPress) {
 698                 QMouseEvent *mouse = (QMouseEvent *)event;
 699
 700                 QTableView *destination;
 701                 ScrubType type;
 702
 703                 if (watched == ui->clip_list->viewport()) {
 704                         destination = ui->clip_list;
 705                         type = SCRUBBING_CLIP_LIST;
 706                 } else if (watched == ui->playlist->viewport()) {
 707                         destination = ui->playlist;
 708                         type = SCRUBBING_PLAYLIST;
 709                 } else {
 710                         return false;
 711                 }
 712                 int column = destination->columnAt(mouse->x());
 713                 int row = destination->rowAt(mouse->y());
 714                 if (column == -1 || row == -1)
 715                         return false;
 716
 717                 if (type == SCRUBBING_CLIP_LIST) {
 718                         if (ClipList::Column(column) == ClipList::Column::IN) {
 719                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 720                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 721                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 722                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 723                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 724                         } else {
 725                                 return false;
 726                         }
 727                 } else {
 728                         if (PlayList::Column(column) == PlayList::Column::IN) {
 729                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 730                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 731                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 732                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 733                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 734                         } else {
 735                                 return false;
 736                         }
 737                 }
 738
 739                 scrubbing = true;
 740                 scrub_row = row;
 741                 scrub_column = column;
 742                 scrub_x_origin = mouse->x();
 743                 scrub_type = type;
 744         } else if (event->type() == QEvent::MouseMove) {
 745                 QMouseEvent *mouse = (QMouseEvent *)event;
 746                 if (mouse->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 747                         scrub_sensitivity *= 10;
 748                         wheel_sensitivity *= 10;
 749                 }
 750                 if (mouse->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 751                         scrub_sensitivity /= 10;
 752                         wheel_sensitivity /= 10;
 753                 }
 754                 if (scrubbing) {
 755                         int offset = mouse->x() - scrub_x_origin;
 756                         int adjusted_offset;
 757                         if (offset >= dead_zone_pixels) {
 758                                 adjusted_offset = offset - dead_zone_pixels;
 759                         } else if (offset < -dead_zone_pixels) {
 760                                 adjusted_offset = offset + dead_zone_pixels;
 761                         } else {
 762                                 adjusted_offset = 0;
 763                         }
 764
 765                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 766                         currently_deferring_model_changes = true;
 767                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 768                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 769                                 if (scrub_column == int(ClipList::Column::IN)) {
 770                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 771                                         set_pts_in(pts, current_pts, clip);
 772                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 773                                 } else {
 774                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 775                                         pts = std::max(pts, clip->pts_in);
 776                                         pts = std::min(pts, current_pts);
 777                                         clip->pts_out = pts;
 778                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 779                                 }
 780                         } else {
 781                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 782                                 if (scrub_column == int(PlayList::Column::IN)) {
 783                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 784                                         set_pts_in(pts, current_pts, clip);
 785                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 786                                 } else {
 787                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 788                                         pts = std::max(pts, clip->pts_in);
 789                                         pts = std::min(pts, current_pts);
 790                                         clip->pts_out = pts;
 791                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 792                                 }
 793                         }
 794                         currently_deferring_model_changes = false;
 795
 796                         return true;  // Don't use this mouse movement for selecting things.
 797                 }
 798         } else if (event->type() == QEvent::Wheel) {
 799                 QWheelEvent *wheel = (QWheelEvent *)event;
 800                 int angle_delta = wheel->angleDelta().y();
 801                 if (wheel->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 802                         scrub_sensitivity *= 10;
 803                         wheel_sensitivity *= 10;
 804                 }
 805                 if (wheel->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 806                         scrub_sensitivity /= 10;
 807                         wheel_sensitivity /= 10;
 808                         angle_delta = wheel->angleDelta().x();  // Qt ickiness.
 809                 }
 810
 811                 QTableView *destination;
 812                 JogDestination jog_destination;
 813                 if (watched == ui->clip_list->viewport()) {
 814                         destination = ui->clip_list;
 815                         jog_destination = JOG_CLIP_LIST;
 816                         last_mousewheel_camera_row = -1;
 817                 } else if (watched == ui->playlist->viewport()) {
 818                         destination = ui->playlist;
 819                         jog_destination = JOG_PLAYLIST;
 820                         if (destination->columnAt(wheel->x()) != int(PlayList::Column::CAMERA)) {
 821                                 last_mousewheel_camera_row = -1;
 822                         }
 823                 } else {
 824                         last_mousewheel_camera_row = -1;
 825                         return false;
 826                 }
 827
 828                 int column = destination->columnAt(wheel->x());
 829                 int row = destination->rowAt(wheel->y());
 830                 if (column == -1 || row == -1)
 831                         return false;
 832
 833                 // Only adjust pts with the wheel if the given row is selected.
 834                 if (!destination->hasFocus() ||
 835                     row != destination->selectionModel()->currentIndex().row()) {
 836                         return false;
 837                 }
 838
 839                 jog_internal(jog_destination, row, column, stream_idx, angle_delta * wheel_sensitivity);
 840                 return true;  // Don't scroll.
 841         } else if (event->type() == QEvent::MouseButtonRelease) {
 842                 scrubbing = false;
 843         }
 844         return false;
 845 }
 846
 847 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 848 {
 849         if (rounding == LAST_BEFORE) {
 850                 lock_guard<mutex> lock(frame_mu);
 851                 if (frames[stream_idx].empty())
 852                         return;
 853                 auto it = find_last_frame_before(frames[stream_idx], pts);
 854                 if (it != frames[stream_idx].end()) {
 855                         pts = it->pts;
 856                 }
 857         } else {
 858                 assert(rounding == FIRST_AT_OR_AFTER);
 859                 lock_guard<mutex> lock(frame_mu);
 860                 if (frames[stream_idx].empty())
 861                         return;
 862                 auto it = find_first_frame_at_or_after(frames[stream_idx], pts);
 863                 if (it != frames[stream_idx].end()) {
 864                         pts = it->pts;
 865                 }
 866         }
 867
 868         Clip fake_clip;
 869         fake_clip.pts_in = pts;
 870         fake_clip.pts_out = pts + 1;
 871         fake_clip.stream_idx = stream_idx;
 872         preview_player->play(fake_clip);
 873 }
 874
 875 void MainWindow::playlist_selection_changed()
 876 {
 877         enable_or_disable_preview_button();
 878
 879         QItemSelectionModel *selected = ui->playlist->selectionModel();
 880         bool any_selected = selected->hasSelection();
 881         ui->playlist_duplicate_btn->setEnabled(any_selected);
 882         ui->playlist_remove_btn->setEnabled(any_selected);
 883         ui->playlist_move_up_btn->setEnabled(
 884                 any_selected && selected->selectedRows().front().row() > 0);
 885         ui->playlist_move_down_btn->setEnabled(
 886                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 887
 888         ui->play_btn->setEnabled(!playlist_clips->empty());
 889         midi_mapper.set_play_enabled(!playlist_clips->empty());
 890
 891         if (!any_selected) {
 892                 set_output_status("paused");
 893         } else {
 894                 vector<ClipWithID> clips;
 895                 for (size_t row = selected->selectedRows().front().row(); row < playlist_clips->size(); ++row) {
 896                         clips.emplace_back(*playlist_clips->clip_with_id(row));
 897                 }
 898                 double remaining = compute_total_time(clips);
 899                 set_output_status(format_duration(remaining) + " ready");
 900         }
 901 }
 902
 903 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &previous)
 904 {
 905         int camera_selected = -1;
 906         if (cliplist_clips->is_camera_column(current.column())) {
 907                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 908
 909                 // See the comment on hidden_jog_column.
 910                 if (current.row() != previous.row()) {
 911                         hidden_jog_column = -1;
 912                 } else if (hidden_jog_column == -1) {
 913                         hidden_jog_column = previous.column();
 914                 }
 915         } else {
 916                 hidden_jog_column = -1;
 917         }
 918         highlight_camera_input(camera_selected);
 919         enable_or_disable_queue_button();
 920 }
 921
 922 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 923 {
 924         char time_str[256];
 925         if (estimated_seconds_left < 60.0) {
 926                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 927         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 928                 int s = lrintf(estimated_seconds_left);
 929                 int m = s / 60;
 930                 s %= 60;
 931                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 932         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 933                 int m = lrintf(estimated_seconds_left / 60.0);
 934                 snprintf(time_str, sizeof(time_str), "%dm", m);
 935         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 936                 int m = lrintf(estimated_seconds_left / 60.0);
 937                 int h = m / 60;
 938                 m %= 60;
 939                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 940         } else {  // More than ten hours: Xh.
 941                 int h = lrintf(estimated_seconds_left / 3600.0);
 942                 snprintf(time_str, sizeof(time_str), "%dh", h);
 943         }
 944         char buf[256];
 945         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 946
 947         std::string label = buf;
 948
 949         post_to_main_thread([this, label] {
 950                 disk_free_label->setText(QString::fromStdString(label));
 951                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 952         });
 953 }
 954
 955 void MainWindow::exit_triggered()
 956 {
 957         close();
 958 }
 959
 960 void MainWindow::export_cliplist_clip_multitrack_triggered()
 961 {
 962         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 963         if (!selected->hasSelection()) {
 964                 QMessageBox msgbox;
 965                 msgbox.setText("No clip selected in the clip list. Select one and try exporting again.");
 966                 msgbox.exec();
 967                 return;
 968         }
 969
 970         QModelIndex index = selected->currentIndex();
 971         Clip clip = *cliplist_clips->clip(index.row());
 972         QString filename = QFileDialog::getSaveFileName(this,
 973                 "Export multitrack clip", QString(), tr("Matroska video files (*.mkv)"));
 974         if (filename.isNull()) {
 975                 // Cancel.
 976                 return;
 977         }
 978         if (!filename.endsWith(".mkv")) {
 979                 filename += ".mkv";
 980         }
 981         export_multitrack_clip(filename.toStdString(), clip);
 982 }
 983
 984 void MainWindow::export_playlist_clip_interpolated_triggered()
 985 {
 986         QItemSelectionModel *selected = ui->playlist->selectionModel();
 987         if (!selected->hasSelection()) {
 988                 QMessageBox msgbox;
 989                 msgbox.setText("No clip selected in the playlist. Select one and try exporting again.");
 990                 msgbox.exec();
 991                 return;
 992         }
 993
 994         QString filename = QFileDialog::getSaveFileName(this,
 995                 "Export interpolated clip", QString(), tr("Matroska video files (*.mkv)"));
 996         if (filename.isNull()) {
 997                 // Cancel.
 998                 return;
 999         }
1000         if (!filename.endsWith(".mkv")) {
1001                 filename += ".mkv";
1002         }
1003
1004         vector<Clip> clips;
1005         QModelIndexList rows = selected->selectedRows();
1006         for (QModelIndex index : rows) {
1007                 clips.push_back(*playlist_clips->clip(index.row()));
1008         }
1009         export_interpolated_clip(filename.toStdString(), clips);
1010 }
1011
1012 void MainWindow::manual_triggered()
1013 {
1014         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
1015                 QMessageBox msgbox;
1016                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
1017                 msgbox.exec();
1018         }
1019 }
1020
1021 void MainWindow::about_triggered()
1022 {
1023         AboutDialog("Futatabi", "Multicamera slow motion video server").exec();
1024 }
1025
1026 void MainWindow::undo_triggered()
1027 {
1028         // Finish any deferred action.
1029         if (defer_timeout->isActive()) {
1030                 defer_timeout->stop();
1031                 state_changed(deferred_state);
1032         }
1033
1034         StateProto redo_state;
1035         *redo_state.mutable_clip_list() = cliplist_clips->serialize();
1036         *redo_state.mutable_play_list() = playlist_clips->serialize();
1037         redo_stack.push_back(std::move(redo_state));
1038         ui->redo_action->setEnabled(true);
1039
1040         assert(undo_stack.size() > 1);
1041
1042         // Pop off the current state, which is always at the top of the stack.
1043         undo_stack.pop_back();
1044
1045         StateProto state = undo_stack.back();
1046         ui->undo_action->setEnabled(undo_stack.size() > 1);
1047
1048         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
1049         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
1050
1051         db.store_state(state);
1052 }
1053
1054 void MainWindow::redo_triggered()
1055 {
1056         assert(!redo_stack.empty());
1057
1058         ui->undo_action->setEnabled(true);
1059         ui->redo_action->setEnabled(true);
1060
1061         undo_stack.push_back(std::move(redo_stack.back()));
1062         redo_stack.pop_back();
1063         ui->undo_action->setEnabled(true);
1064         ui->redo_action->setEnabled(!redo_stack.empty());
1065
1066         const StateProto &state = undo_stack.back();
1067         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
1068         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
1069
1070         db.store_state(state);
1071 }
1072
1073 void MainWindow::quality_toggled(int quality, bool checked)
1074 {
1075         if (!checked) {
1076                 return;
1077         }
1078         global_flags.interpolation_quality = quality;
1079         if (quality != 0 &&  // Turning interpolation off is always possible.
1080             quality != flow_initialized_interpolation_quality) {
1081                 QMessageBox msgbox;
1082                 msgbox.setText(QString::fromStdString(
1083                         "The interpolation quality for the main output cannot be changed at runtime, "
1084                         "except being turned completely off; it will take effect for exported files "
1085                         "only until next restart. The live output quality thus remains at " +
1086                         to_string(flow_initialized_interpolation_quality) + "."));
1087                 msgbox.exec();
1088         }
1089
1090         save_settings();
1091 }
1092
1093 void MainWindow::padding_toggled(double seconds, bool checked)
1094 {
1095         if (!checked) {
1096                 return;
1097         }
1098         global_flags.cue_point_padding_seconds = seconds;
1099         save_settings();
1100 }
1101
1102 void MainWindow::highlight_camera_input(int stream_idx)
1103 {
1104         for (unsigned i = 0; i < num_cameras; ++i) {
1105                 if (unsigned(stream_idx) == i) {
1106                         displays[i].frame->setStyleSheet("background: rgb(0,255,0)");
1107                 } else {
1108                         displays[i].frame->setStyleSheet("");
1109                 }
1110         }
1111         midi_mapper.highlight_camera_input(stream_idx);
1112 }
1113
1114 void MainWindow::enable_or_disable_preview_button()
1115 {
1116         // Follows the logic in preview_clicked().
1117
1118         if (ui->playlist->hasFocus()) {
1119                 // Allow the playlist as preview iff it has focus and something is selected.
1120                 // TODO: Is this part really relevant?
1121                 QItemSelectionModel *selected = ui->playlist->selectionModel();
1122                 if (selected->hasSelection()) {
1123                         ui->preview_btn->setEnabled(true);
1124                         midi_mapper.set_preview_enabled(true);
1125                         return;
1126                 }
1127         }
1128
1129         // TODO: Perhaps only enable this if something is actually selected.
1130         ui->preview_btn->setEnabled(!cliplist_clips->empty());
1131         midi_mapper.set_preview_enabled(!cliplist_clips->empty());
1132 }
1133
1134 void MainWindow::enable_or_disable_queue_button()
1135 {
1136         // Follows the logic in queue_clicked().
1137         // TODO: Perhaps only enable this if something is actually selected.
1138
1139         bool enabled;
1140
1141         if (cliplist_clips->empty()) {
1142                 enabled = false;
1143         } else {
1144                 QItemSelectionModel *selected = ui->clip_list->selectionModel();
1145                 if (!selected->hasSelection()) {
1146                         Clip clip = *cliplist_clips->back();
1147                         enabled = clip.pts_out != -1;
1148                 } else {
1149                         QModelIndex index = selected->currentIndex();
1150                         Clip clip = *cliplist_clips->clip(index.row());
1151                         enabled = clip.pts_out != -1;
1152                 }
1153         }
1154
1155         ui->queue_btn->setEnabled(enabled);
1156         midi_mapper.set_queue_enabled(enabled);
1157 }
1158
1159 void MainWindow::set_output_status(const string &status)
1160 {
1161         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
1162         if (live_player != nullptr) {
1163                 live_player->set_pause_status(status);
1164         }
1165
1166         lock_guard<mutex> lock(queue_status_mu);
1167         queue_status = status;
1168 }
1169
1170 pair<string, string> MainWindow::get_queue_status() const
1171 {
1172         lock_guard<mutex> lock(queue_status_mu);
1173         return { queue_status, "text/plain" };
1174 }
1175
1176 void MainWindow::display_frame(unsigned stream_idx, const FrameOnDisk &frame)
1177 {
1178         if (stream_idx >= MAX_STREAMS) {
1179                 fprintf(stderr, "WARNING: Ignoring too-high stream index %u.\n", stream_idx);
1180                 return;
1181         }
1182         if (stream_idx >= num_cameras) {
1183                 post_to_main_thread_and_wait([this, stream_idx] {
1184                         num_cameras = stream_idx + 1;
1185                         change_num_cameras();
1186                 });
1187         }
1188         displays[stream_idx].display->setFrame(stream_idx, frame);
1189 }
1190
1191 void MainWindow::preview()
1192 {
1193         post_to_main_thread([this] {
1194                 preview_clicked();
1195         });
1196 }
1197
1198 void MainWindow::queue()
1199 {
1200         post_to_main_thread([this] {
1201                 queue_clicked();
1202         });
1203 }
1204
1205 void MainWindow::play()
1206 {
1207         post_to_main_thread([this] {
1208                 play_clicked();
1209         });
1210 }
1211
1212 void MainWindow::toggle_lock()
1213 {
1214         post_to_main_thread([this] {
1215                 ui->speed_lock_btn->setChecked(!ui->speed_lock_btn->isChecked());
1216                 speed_lock_clicked();
1217         });
1218 }
1219
1220 void MainWindow::jog(int delta)
1221 {
1222         post_to_main_thread([this, delta] {
1223                 int64_t pts_delta = delta * (TIMEBASE / 60);  // One click = frame at 60 fps.
1224                 if (ui->playlist->hasFocus()) {
1225                         QModelIndex selected = ui->playlist->selectionModel()->currentIndex();
1226                         if (selected.column() != -1 && selected.row() != -1) {
1227                                 jog_internal(JOG_PLAYLIST, selected.row(), selected.column(), /*stream_idx=*/-1, pts_delta);
1228                         }
1229                 } else if (ui->clip_list->hasFocus()) {
1230                         QModelIndex selected = ui->clip_list->selectionModel()->currentIndex();
1231                         if (cliplist_clips->is_camera_column(selected.column()) &&
1232                             hidden_jog_column != -1) {
1233                                 // See the definition on hidden_jog_column.
1234                                 selected = selected.sibling(selected.row(), hidden_jog_column);
1235                                 ui->clip_list->selectionModel()->setCurrentIndex(selected, QItemSelectionModel::ClearAndSelect);
1236                                 hidden_jog_column = -1;
1237                         }
1238                         if (selected.column() != -1 && selected.row() != -1) {
1239                                 jog_internal(JOG_CLIP_LIST, selected.row(), selected.column(), ui->preview_display->get_stream_idx(), pts_delta);
1240                         }
1241                 }
1242         });
1243 }
1244
1245 void MainWindow::switch_camera(unsigned camera_idx)
1246 {
1247         post_to_main_thread([this, camera_idx] {
1248                 if (camera_idx < num_cameras) {  // TODO: Also make this change a highlighted clip?
1249                         preview_angle_clicked(camera_idx);
1250                 }
1251         });
1252 }
1253
1254 void MainWindow::set_master_speed(float speed)
1255 {
1256         speed = min(max(speed, 0.1f), 2.0f);
1257
1258         post_to_main_thread([this, speed] {
1259                 if (ui->speed_lock_btn->isChecked()) {
1260                         return;
1261                 }
1262
1263                 int percent = lrintf(speed * 100.0f);
1264                 ui->speed_slider->blockSignals(true);
1265                 ui->speed_slider->setValue(percent);
1266                 ui->speed_slider->blockSignals(false);
1267                 ui->speed_lock_btn->setText(QString::fromStdString(" " + to_string(percent) + "%"));
1268
1269                 live_player->set_master_speed(speed);
1270         });
1271 }
1272
1273 void MainWindow::cue_in()
1274 {
1275         post_to_main_thread([this] { cue_in_clicked(); });
1276 }
1277
1278 void MainWindow::cue_out()
1279 {
1280         post_to_main_thread([this] { cue_out_clicked(); });
1281 }
1282
1283 template<class Model>
1284 void MainWindow::replace_model(QTableView *view, Model **model, Model *new_model)
1285 {
1286         QItemSelectionModel *old_selection_model = view->selectionModel();
1287         view->setModel(new_model);
1288         delete *model;
1289         delete old_selection_model;
1290         *model = new_model;
1291         connect(new_model, &Model::any_content_changed, this, &MainWindow::content_changed);
1292 }
1293
1294 void MainWindow::start_tally()
1295 {
1296         http_reply = http.get(QNetworkRequest(QString::fromStdString(global_flags.tally_url)));
1297         connect(http_reply, &QNetworkReply::finished, this, &MainWindow::tally_received);
1298 }
1299
1300 void MainWindow::tally_received()
1301 {
1302         unsigned time_to_next_tally_ms;
1303         if (http_reply->error()) {
1304                 fprintf(stderr, "HTTP get of '%s' failed: %s\n", global_flags.tally_url.c_str(),
1305                         http_reply->errorString().toStdString().c_str());
1306                 ui->live_frame->setStyleSheet("");
1307                 time_to_next_tally_ms = 1000;
1308         } else {
1309                 string contents = http_reply->readAll().toStdString();
1310                 ui->live_frame->setStyleSheet(QString::fromStdString("background: " + contents));
1311                 time_to_next_tally_ms = 100;
1312         }
1313         http_reply->deleteLater();
1314         http_reply = nullptr;
1315
1316         QTimer::singleShot(time_to_next_tally_ms, this, &MainWindow::start_tally);
1317 }