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 "midi_mapping_dialog.h"
  10 #include "shared/aboutdialog.h"
  11 #include "shared/disk_space_estimator.h"
  12 #include "shared/post_to_main_thread.h"
  13 #include "shared/timebase.h"
  14 #include "ui_mainwindow.h"
  15
  16 #include <QDesktopServices>
  17 #include <QFileDialog>
  18 #include <QMessageBox>
  19 #include <QMouseEvent>
  20 #include <QNetworkReply>
  21 #include <QShortcut>
  22 #include <QTimer>
  23 #include <QWheelEvent>
  24 #include <future>
  25 #include <sqlite3.h>
  26 #include <string>
  27 #include <vector>
  28
  29 using namespace std;
  30 using namespace std::placeholders;
  31
  32 MainWindow *global_mainwindow = nullptr;
  33 static ClipList *cliplist_clips;
  34 static PlayList *playlist_clips;
  35
  36 extern int64_t current_pts;
  37
  38 namespace {
  39
  40 void set_pts_in(int64_t pts, int64_t current_pts, ClipProxy &clip)
  41 {
  42         pts = std::max<int64_t>(pts, 0);
  43         if (clip->pts_out == -1) {
  44                 pts = std::min(pts, current_pts);
  45         } else {
  46                 pts = std::min(pts, clip->pts_out);
  47         }
  48         clip->pts_in = pts;
  49 }
  50
  51 }  // namespace
  52
  53 MainWindow::MainWindow()
  54         : ui(new Ui::MainWindow),
  55           db(global_flags.working_directory + "/futatabi.db"),
  56           midi_mapper(this)
  57 {
  58         global_mainwindow = this;
  59         ui->setupUi(this);
  60
  61         // Load settings from database.
  62         SettingsProto settings = db.get_settings();
  63         if (!global_flags.interpolation_quality_set) {
  64                 if (settings.interpolation_quality() != 0) {
  65                         global_flags.interpolation_quality = settings.interpolation_quality() - 1;
  66                 }
  67         }
  68         if (!global_flags.cue_in_point_padding_set) {
  69                 global_flags.cue_in_point_padding_seconds = settings.cue_in_point_padding_seconds();  // Default 0 is fine.
  70         }
  71         if (!global_flags.cue_out_point_padding_set) {
  72                 global_flags.cue_out_point_padding_seconds = settings.cue_out_point_padding_seconds();  // Default 0 is fine.
  73         }
  74         if (global_flags.interpolation_quality == 0) {
  75                 // Allocate something just for simplicity; we won't be using it
  76                 // unless the user changes runtime, in which case 1 is fine.
  77                 flow_initialized_interpolation_quality = 1;
  78         } else {
  79                 flow_initialized_interpolation_quality = global_flags.interpolation_quality;
  80         }
  81         save_settings();
  82
  83         // The menus.
  84         connect(ui->midi_mapping_action, &QAction::triggered, this, &MainWindow::midi_mapping_triggered);
  85         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  86         connect(ui->export_cliplist_clip_multitrack_action, &QAction::triggered, this, &MainWindow::export_cliplist_clip_multitrack_triggered);
  87         connect(ui->export_playlist_clip_interpolated_action, &QAction::triggered, this, &MainWindow::export_playlist_clip_interpolated_triggered);
  88         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
  89         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
  90         connect(ui->undo_action, &QAction::triggered, this, &MainWindow::undo_triggered);
  91         connect(ui->redo_action, &QAction::triggered, this, &MainWindow::redo_triggered);
  92         ui->undo_action->setEnabled(false);
  93         ui->redo_action->setEnabled(false);
  94
  95         // The quality group.
  96         QActionGroup *quality_group = new QActionGroup(ui->interpolation_menu);
  97         quality_group->addAction(ui->quality_0_action);
  98         quality_group->addAction(ui->quality_1_action);
  99         quality_group->addAction(ui->quality_2_action);
 100         quality_group->addAction(ui->quality_3_action);
 101         quality_group->addAction(ui->quality_4_action);
 102         if (global_flags.interpolation_quality == 0) {
 103                 ui->quality_0_action->setChecked(true);
 104         } else if (global_flags.interpolation_quality == 1) {
 105                 ui->quality_1_action->setChecked(true);
 106         } else if (global_flags.interpolation_quality == 2) {
 107                 ui->quality_2_action->setChecked(true);
 108         } else if (global_flags.interpolation_quality == 3) {
 109                 ui->quality_3_action->setChecked(true);
 110         } else if (global_flags.interpolation_quality == 4) {
 111                 ui->quality_4_action->setChecked(true);
 112         } else {
 113                 assert(false);
 114         }
 115         connect(ui->quality_0_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 0, _1));
 116         connect(ui->quality_1_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 1, _1));
 117         connect(ui->quality_2_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 2, _1));
 118         connect(ui->quality_3_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 3, _1));
 119         connect(ui->quality_4_action, &QAction::toggled, bind(&MainWindow::quality_toggled, this, 4, _1));
 120
 121         // The cue-in point padding group.
 122         QActionGroup *in_padding_group = new QActionGroup(ui->in_padding_menu);
 123         in_padding_group->addAction(ui->in_padding_0_action);
 124         in_padding_group->addAction(ui->in_padding_1_action);
 125         in_padding_group->addAction(ui->in_padding_2_action);
 126         in_padding_group->addAction(ui->in_padding_5_action);
 127         if (global_flags.cue_in_point_padding_seconds <= 1e-3) {
 128                 ui->in_padding_0_action->setChecked(true);
 129         } else if (fabs(global_flags.cue_in_point_padding_seconds - 1.0) < 1e-3) {
 130                 ui->in_padding_1_action->setChecked(true);
 131         } else if (fabs(global_flags.cue_in_point_padding_seconds - 2.0) < 1e-3) {
 132                 ui->in_padding_2_action->setChecked(true);
 133         } else if (fabs(global_flags.cue_in_point_padding_seconds - 5.0) < 1e-3) {
 134                 ui->in_padding_5_action->setChecked(true);
 135         } else {
 136                 // Nothing to check, which is fine.
 137         }
 138         connect(ui->in_padding_0_action, &QAction::toggled, bind(&MainWindow::in_padding_toggled, this, 0.0, _1));
 139         connect(ui->in_padding_1_action, &QAction::toggled, bind(&MainWindow::in_padding_toggled, this, 1.0, _1));
 140         connect(ui->in_padding_2_action, &QAction::toggled, bind(&MainWindow::in_padding_toggled, this, 2.0, _1));
 141         connect(ui->in_padding_5_action, &QAction::toggled, bind(&MainWindow::in_padding_toggled, this, 5.0, _1));
 142
 143         // Same for the cue-out padding.
 144         QActionGroup *out_padding_group = new QActionGroup(ui->out_padding_menu);
 145         out_padding_group->addAction(ui->out_padding_0_action);
 146         out_padding_group->addAction(ui->out_padding_1_action);
 147         out_padding_group->addAction(ui->out_padding_2_action);
 148         out_padding_group->addAction(ui->out_padding_5_action);
 149         if (global_flags.cue_out_point_padding_seconds <= 1e-3) {
 150                 ui->out_padding_0_action->setChecked(true);
 151         } else if (fabs(global_flags.cue_out_point_padding_seconds - 1.0) < 1e-3) {
 152                 ui->out_padding_1_action->setChecked(true);
 153         } else if (fabs(global_flags.cue_out_point_padding_seconds - 2.0) < 1e-3) {
 154                 ui->out_padding_2_action->setChecked(true);
 155         } else if (fabs(global_flags.cue_out_point_padding_seconds - 5.0) < 1e-3) {
 156                 ui->out_padding_5_action->setChecked(true);
 157         } else {
 158                 // Nothing to check, which is fine.
 159         }
 160         connect(ui->out_padding_0_action, &QAction::toggled, bind(&MainWindow::out_padding_toggled, this, 0.0, _1));
 161         connect(ui->out_padding_1_action, &QAction::toggled, bind(&MainWindow::out_padding_toggled, this, 1.0, _1));
 162         connect(ui->out_padding_2_action, &QAction::toggled, bind(&MainWindow::out_padding_toggled, this, 2.0, _1));
 163         connect(ui->out_padding_5_action, &QAction::toggled, bind(&MainWindow::out_padding_toggled, this, 5.0, _1));
 164
 165         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 166         disk_free_label = new QLabel(this);
 167         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 168         ui->menuBar->setCornerWidget(disk_free_label);
 169
 170         StateProto state = db.get_state();
 171         undo_stack.push_back(state);  // The undo stack always has the current state on top.
 172
 173         cliplist_clips = new ClipList(state.clip_list());
 174         ui->clip_list->setModel(cliplist_clips);
 175         connect(cliplist_clips, &ClipList::any_content_changed, this, &MainWindow::content_changed);
 176
 177         playlist_clips = new PlayList(state.play_list());
 178         ui->playlist->setModel(playlist_clips);
 179         connect(playlist_clips, &PlayList::any_content_changed, this, &MainWindow::content_changed);
 180
 181         // For un-highlighting when we lose focus.
 182         ui->clip_list->installEventFilter(this);
 183
 184         // For scrubbing in the pts columns.
 185         ui->clip_list->viewport()->installEventFilter(this);
 186         ui->playlist->viewport()->installEventFilter(this);
 187
 188         QShortcut *cue_in = new QShortcut(QKeySequence(Qt::Key_A), this);
 189         connect(cue_in, &QShortcut::activated, ui->cue_in_btn, &QPushButton::click);
 190         connect(ui->cue_in_btn, &QPushButton::clicked, this, &MainWindow::cue_in_clicked);
 191
 192         QShortcut *cue_out = new QShortcut(QKeySequence(Qt::Key_S), this);
 193         connect(cue_out, &QShortcut::activated, ui->cue_out_btn, &QPushButton::click);
 194         connect(ui->cue_out_btn, &QPushButton::clicked, this, &MainWindow::cue_out_clicked);
 195
 196         QShortcut *queue = new QShortcut(QKeySequence(Qt::Key_Q), this);
 197         connect(queue, &QShortcut::activated, ui->queue_btn, &QPushButton::click);
 198         connect(ui->queue_btn, &QPushButton::clicked, this, &MainWindow::queue_clicked);
 199
 200         QShortcut *preview = new QShortcut(QKeySequence(Qt::Key_W), this);
 201         connect(preview, &QShortcut::activated, ui->preview_btn, &QPushButton::click);
 202         connect(ui->preview_btn, &QPushButton::clicked, this, &MainWindow::preview_clicked);
 203
 204         QShortcut *play = new QShortcut(QKeySequence(Qt::Key_Space), this);
 205         connect(play, &QShortcut::activated, ui->play_btn, &QPushButton::click);
 206         connect(ui->play_btn, &QPushButton::clicked, this, &MainWindow::play_clicked);
 207
 208         QShortcut *next = new QShortcut(QKeySequence(Qt::Key_N), this);
 209         connect(next, &QShortcut::activated, ui->next_btn, &QPushButton::click);
 210         connect(ui->next_btn, &QPushButton::clicked, this, &MainWindow::next_clicked);
 211
 212         connect(ui->stop_btn, &QPushButton::clicked, this, &MainWindow::stop_clicked);
 213         ui->stop_btn->setEnabled(false);
 214
 215         connect(ui->speed_slider, &QAbstractSlider::valueChanged, this, &MainWindow::speed_slider_changed);
 216         connect(ui->speed_lock_btn, &QPushButton::clicked, this, &MainWindow::speed_lock_clicked);
 217
 218         connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 219
 220         connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
 221         QShortcut *delete_key = new QShortcut(QKeySequence(Qt::Key_Delete), ui->playlist);
 222         connect(delete_key, &QShortcut::activated, [this] {
 223                 if (ui->playlist->hasFocus()) {
 224                         playlist_remove();
 225                 }
 226         });
 227
 228         // TODO: support drag-and-drop.
 229         connect(ui->playlist_move_up_btn, &QPushButton::clicked, [this] { playlist_move(-1); });
 230         connect(ui->playlist_move_down_btn, &QPushButton::clicked, [this] { playlist_move(1); });
 231
 232         connect(ui->playlist->selectionModel(), &QItemSelectionModel::selectionChanged,
 233                 this, &MainWindow::playlist_selection_changed);
 234         playlist_selection_changed();  // First time set-up.
 235
 236         preview_player.reset(new Player(ui->preview_display, Player::NO_STREAM_OUTPUT));
 237         preview_player->set_done_callback([this] {
 238                 post_to_main_thread([this] {
 239                         preview_player_done();
 240                 });
 241         });
 242
 243         live_player.reset(new Player(ui->live_display, Player::HTTPD_STREAM_OUTPUT));
 244         live_player->set_done_callback([this] {
 245                 post_to_main_thread([this] {
 246                         live_player_done();
 247                 });
 248         });
 249         live_player->set_progress_callback([this](const map<uint64_t, double> &progress, double time_remaining) {
 250                 post_to_main_thread([this, progress, time_remaining] {
 251                         live_player_clip_progress(progress, time_remaining);
 252                 });
 253         });
 254         set_output_status("paused");
 255         enable_or_disable_queue_button();
 256
 257         defer_timeout = new QTimer(this);
 258         defer_timeout->setSingleShot(true);
 259         connect(defer_timeout, &QTimer::timeout, this, &MainWindow::defer_timer_expired);
 260         ui->undo_action->setEnabled(true);
 261
 262         lock_blink_timeout = new QTimer(this);
 263         lock_blink_timeout->setSingleShot(true);
 264         connect(lock_blink_timeout, &QTimer::timeout, this, &MainWindow::lock_blink_timer_expired);
 265
 266         connect(ui->clip_list->selectionModel(), &QItemSelectionModel::currentChanged,
 267                 this, &MainWindow::clip_list_selection_changed);
 268         enable_or_disable_queue_button();
 269
 270         // Find out how many cameras we have in the existing frames;
 271         // if none, we start with two cameras.
 272         num_cameras = 2;
 273         {
 274                 lock_guard<mutex> lock(frame_mu);
 275                 for (size_t stream_idx = 2; stream_idx < MAX_STREAMS; ++stream_idx) {
 276                         if (!frames[stream_idx].empty()) {
 277                                 num_cameras = stream_idx + 1;
 278                         }
 279                 }
 280         }
 281         change_num_cameras();
 282
 283         if (!global_flags.tally_url.empty()) {
 284                 start_tally();
 285         }
 286
 287         if (!global_flags.midi_mapping_filename.empty()) {
 288                 MIDIMappingProto midi_mapping;
 289                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 290                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 291                                 global_flags.midi_mapping_filename.c_str());
 292                         exit(1);
 293                 }
 294                 midi_mapper.set_midi_mapping(midi_mapping);
 295         }
 296         midi_mapper.refresh_lights();
 297         midi_mapper.start_thread();
 298 }
 299
 300 void MainWindow::change_num_cameras()
 301 {
 302         assert(num_cameras >= displays.size());  // We only add, never remove.
 303
 304         // Make new display rows.
 305         unsigned display_rows = (num_cameras + 1) / 2;
 306         ui->video_displays->setStretch(1, display_rows);
 307         for (unsigned i = displays.size(); i < num_cameras; ++i) {
 308                 QFrame *frame = new QFrame(this);
 309                 frame->setAutoFillBackground(true);
 310
 311                 QLayout *layout = new QGridLayout(frame);
 312                 frame->setLayout(layout);
 313                 layout->setContentsMargins(3, 3, 3, 3);
 314
 315                 JPEGFrameView *display = new JPEGFrameView(frame);
 316                 display->setAutoFillBackground(true);
 317                 layout->addWidget(display);
 318
 319                 ui->input_displays->addWidget(frame, i / 2, i % 2);
 320                 display->set_overlay(to_string(i + 1));
 321
 322                 QPushButton *preview_btn = new QPushButton(this);
 323                 preview_btn->setMaximumSize(20, 17);
 324                 preview_btn->setText(QString::fromStdString(to_string(i + 1)));
 325                 ui->preview_layout->addWidget(preview_btn);
 326
 327                 displays.emplace_back(FrameAndDisplay{ frame, display, preview_btn });
 328
 329                 connect(display, &JPEGFrameView::clicked, preview_btn, &QPushButton::click);
 330                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 331                 connect(shortcut, &QShortcut::activated, preview_btn, &QPushButton::click);
 332
 333                 connect(preview_btn, &QPushButton::clicked, [this, i] { preview_angle_clicked(i); });
 334         }
 335
 336         cliplist_clips->change_num_cameras(num_cameras);
 337         playlist_clips->change_num_cameras(num_cameras);
 338
 339         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 340 }
 341
 342 MainWindow::~MainWindow()
 343 {
 344         // We don't have a context to release Player's OpenGL resources in here,
 345         // so instead of crashing on exit, leak it.
 346         live_player.release();
 347         preview_player.release();
 348 }
 349
 350 void MainWindow::cue_in_clicked()
 351 {
 352         if (!cliplist_clips->empty() && cliplist_clips->back()->pts_out < 0) {
 353                 cliplist_clips->mutable_back()->pts_in = current_pts;
 354         } else {
 355                 Clip clip;
 356                 clip.pts_in = max<int64_t>(current_pts - lrint(global_flags.cue_in_point_padding_seconds * TIMEBASE), 0);
 357                 cliplist_clips->add_clip(clip);
 358                 playlist_selection_changed();
 359         }
 360
 361         // Select the item so that we can jog it.
 362         ui->clip_list->setFocus();
 363         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::IN));
 364         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 365         ui->clip_list->scrollToBottom();
 366         enable_or_disable_queue_button();
 367 }
 368
 369 void MainWindow::cue_out_clicked()
 370 {
 371         if (cliplist_clips->empty()) {
 372                 return;
 373         }
 374
 375         cliplist_clips->mutable_back()->pts_out = current_pts + lrint(global_flags.cue_out_point_padding_seconds * TIMEBASE);
 376
 377         // Select the item so that we can jog it.
 378         ui->clip_list->setFocus();
 379         QModelIndex index = cliplist_clips->index(cliplist_clips->size() - 1, int(ClipList::Column::OUT));
 380         ui->clip_list->selectionModel()->setCurrentIndex(index, QItemSelectionModel::ClearAndSelect);
 381         ui->clip_list->scrollToBottom();
 382         enable_or_disable_queue_button();
 383 }
 384
 385 void MainWindow::queue_clicked()
 386 {
 387         // See also enable_or_disable_queue_button().
 388
 389         if (cliplist_clips->empty()) {
 390                 return;
 391         }
 392
 393         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 394         if (!selected->hasSelection()) {
 395                 Clip clip = *cliplist_clips->back();
 396                 clip.stream_idx = 0;
 397                 if (clip.pts_out != -1) {
 398                         playlist_clips->add_clip(clip);
 399                         playlist_selection_changed();
 400                         ui->playlist->scrollToBottom();
 401                 }
 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
 413         if (clip.pts_out != -1) {
 414                 playlist_clips->add_clip(clip);
 415                 playlist_selection_changed();
 416                 ui->playlist->scrollToBottom();
 417                 if (!ui->playlist->selectionModel()->hasSelection()) {
 418                         // TODO: Figure out why this doesn't always seem to actually select the row.
 419                         QModelIndex bottom = playlist_clips->index(playlist_clips->size() - 1, 0);
 420                         ui->playlist->setCurrentIndex(bottom);
 421                 }
 422         }
 423 }
 424
 425 void MainWindow::preview_clicked()
 426 {
 427         // See also enable_or_disable_preview_button().
 428
 429         if (ui->playlist->hasFocus()) {
 430                 // Allow the playlist as preview iff it has focus and something is selected.
 431                 QItemSelectionModel *selected = ui->playlist->selectionModel();
 432                 if (selected->hasSelection()) {
 433                         QModelIndex index = selected->currentIndex();
 434                         const Clip &clip = *playlist_clips->clip(index.row());
 435                         preview_player->play(clip);
 436                         preview_playing = true;
 437                         enable_or_disable_preview_button();
 438                         return;
 439                 }
 440         }
 441
 442         if (cliplist_clips->empty())
 443                 return;
 444
 445         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 446         if (!selected->hasSelection()) {
 447                 preview_player->play(*cliplist_clips->back());
 448                 preview_playing = true;
 449                 enable_or_disable_preview_button();
 450                 return;
 451         }
 452
 453         QModelIndex index = selected->currentIndex();
 454         Clip clip = *cliplist_clips->clip(index.row());
 455         if (cliplist_clips->is_camera_column(index.column())) {
 456                 clip.stream_idx = index.column() - int(ClipList::Column::CAMERA_1);
 457         } else {
 458                 clip.stream_idx = ui->preview_display->get_stream_idx();
 459         }
 460         preview_player->play(clip);
 461         preview_playing = true;
 462         enable_or_disable_preview_button();
 463 }
 464
 465 void MainWindow::preview_angle_clicked(unsigned stream_idx)
 466 {
 467         preview_player->override_angle(stream_idx);
 468
 469         // Change the selection if we were previewing a clip from the clip list.
 470         // (The only other thing we could be showing is a pts scrub, and if so,
 471         // that would be selected.)
 472         QItemSelectionModel *selected = ui->clip_list->selectionModel();
 473         if (selected->hasSelection()) {
 474                 QModelIndex cell = selected->selectedIndexes()[0];
 475                 int column = int(ClipList::Column::CAMERA_1) + stream_idx;
 476                 selected->setCurrentIndex(cell.sibling(cell.row(), column), QItemSelectionModel::ClearAndSelect);
 477         }
 478 }
 479
 480 void MainWindow::playlist_duplicate()
 481 {
 482         QItemSelectionModel *selected = ui->playlist->selectionModel();
 483         if (!selected->hasSelection()) {
 484                 // Should have been grayed out, but OK.
 485                 return;
 486         }
 487         QModelIndexList rows = selected->selectedRows();
 488         int first = rows.front().row(), last = rows.back().row();
 489         playlist_clips->duplicate_clips(first, last);
 490         playlist_selection_changed();
 491 }
 492
 493 void MainWindow::playlist_remove()
 494 {
 495         QItemSelectionModel *selected = ui->playlist->selectionModel();
 496         if (!selected->hasSelection()) {
 497                 // Should have been grayed out, but OK.
 498                 return;
 499         }
 500         QModelIndexList rows = selected->selectedRows();
 501         int first = rows.front().row(), last = rows.back().row();
 502         playlist_clips->erase_clips(first, last);
 503
 504         // TODO: select the next one in the list?
 505
 506         playlist_selection_changed();
 507 }
 508
 509 void MainWindow::playlist_move(int delta)
 510 {
 511         QItemSelectionModel *selected = ui->playlist->selectionModel();
 512         if (!selected->hasSelection()) {
 513                 // Should have been grayed out, but OK.
 514                 return;
 515         }
 516
 517         QModelIndexList rows = selected->selectedRows();
 518         int first = rows.front().row(), last = rows.back().row();
 519         if ((delta == -1 && first == 0) ||
 520             (delta == 1 && size_t(last) == playlist_clips->size() - 1)) {
 521                 // Should have been grayed out, but OK.
 522                 return;
 523         }
 524
 525         playlist_clips->move_clips(first, last, delta);
 526         playlist_selection_changed();
 527 }
 528
 529 void MainWindow::jog_internal(JogDestination jog_destination, int row, int column, int stream_idx, int pts_delta)
 530 {
 531         constexpr int camera_pts_per_pixel = 1500;  // One click of most mice (15 degrees), multiplied by the default wheel_sensitivity.
 532
 533         int in_column, out_column, camera_column;
 534         if (jog_destination == JOG_CLIP_LIST) {
 535                 in_column = int(ClipList::Column::IN);
 536                 out_column = int(ClipList::Column::OUT);
 537                 camera_column = -1;
 538         } else if (jog_destination == JOG_PLAYLIST) {
 539                 in_column = int(PlayList::Column::IN);
 540                 out_column = int(PlayList::Column::OUT);
 541                 camera_column = int(PlayList::Column::CAMERA);
 542         } else {
 543                 assert(false);
 544         }
 545
 546         currently_deferring_model_changes = true;
 547         {
 548                 current_change_id = (jog_destination == JOG_CLIP_LIST) ? "cliplist:" : "playlist:";
 549                 ClipProxy clip = (jog_destination == JOG_CLIP_LIST) ? cliplist_clips->mutable_clip(row) : playlist_clips->mutable_clip(row);
 550                 if (jog_destination == JOG_PLAYLIST) {
 551                         stream_idx = clip->stream_idx;
 552                 }
 553
 554                 if (column == in_column) {
 555                         current_change_id += "in:" + to_string(row);
 556                         int64_t pts = clip->pts_in + pts_delta;
 557                         set_pts_in(pts, current_pts, clip);
 558                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 559                 } else if (column == out_column) {
 560                         current_change_id += "out:" + to_string(row);
 561                         int64_t pts = clip->pts_out + pts_delta;
 562                         pts = std::max(pts, clip->pts_in);
 563                         pts = std::min(pts, current_pts);
 564                         clip->pts_out = pts;
 565                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 566                 } else if (column == camera_column) {
 567                         current_change_id += "camera:" + to_string(row);
 568                         int angle_degrees = pts_delta;
 569                         if (last_mousewheel_camera_row == row) {
 570                                 angle_degrees += leftover_angle_degrees;
 571                         }
 572
 573                         int stream_idx = clip->stream_idx + angle_degrees / camera_pts_per_pixel;
 574                         stream_idx = std::max(stream_idx, 0);
 575                         stream_idx = std::min<int>(stream_idx, num_cameras - 1);
 576                         clip->stream_idx = stream_idx;
 577
 578                         last_mousewheel_camera_row = row;
 579                         leftover_angle_degrees = angle_degrees % camera_pts_per_pixel;
 580
 581                         // Don't update the live view, that's rarely what the operator wants.
 582                 }
 583         }
 584         currently_deferring_model_changes = false;
 585 }
 586
 587 void MainWindow::defer_timer_expired()
 588 {
 589         state_changed(deferred_state);
 590 }
 591
 592 void MainWindow::content_changed()
 593 {
 594         // If we are playing, update the part of the playlist that's not playing yet.
 595         vector<ClipWithID> clips;
 596         for (unsigned row = 0; row < playlist_clips->size(); ++row) {
 597                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 598         }
 599         live_player->splice_play(clips);
 600
 601         // Serialize the state.
 602         if (defer_timeout->isActive() &&
 603             (!currently_deferring_model_changes || deferred_change_id != current_change_id)) {
 604                 // There's some deferred event waiting, but this event is unrelated.
 605                 // So it's time to short-circuit that timer and do the work it wanted to do.
 606                 defer_timeout->stop();
 607                 state_changed(deferred_state);
 608         }
 609         StateProto state;
 610         *state.mutable_clip_list() = cliplist_clips->serialize();
 611         *state.mutable_play_list() = playlist_clips->serialize();
 612         if (currently_deferring_model_changes) {
 613                 deferred_change_id = current_change_id;
 614                 deferred_state = std::move(state);
 615                 defer_timeout->start(200);
 616                 return;
 617         }
 618         state_changed(state);
 619 }
 620
 621 void MainWindow::state_changed(const StateProto &state)
 622 {
 623         db.store_state(state);
 624
 625         redo_stack.clear();
 626         ui->redo_action->setEnabled(false);
 627
 628         undo_stack.push_back(state);
 629         ui->undo_action->setEnabled(undo_stack.size() > 1);
 630
 631         // Make sure it doesn't grow without bounds.
 632         while (undo_stack.size() >= 100) {
 633                 undo_stack.pop_front();
 634         }
 635 }
 636
 637 void MainWindow::save_settings()
 638 {
 639         SettingsProto settings;
 640         settings.set_interpolation_quality(global_flags.interpolation_quality + 1);
 641         settings.set_cue_in_point_padding_seconds(global_flags.cue_in_point_padding_seconds);
 642         settings.set_cue_out_point_padding_seconds(global_flags.cue_out_point_padding_seconds);
 643         db.store_settings(settings);
 644 }
 645
 646 void MainWindow::lock_blink_timer_expired()
 647 {
 648         midi_mapper.set_locked(MIDIMapper::LightState(ui->speed_lock_btn->isChecked()));  // Presumably On, or the timer should have been canceled.
 649 }
 650
 651 void MainWindow::play_clicked()
 652 {
 653         QItemSelectionModel *selected = ui->playlist->selectionModel();
 654         if (!selected->hasSelection()) {
 655                 return;
 656         }
 657         unsigned start_row = selected->selectedRows(0)[0].row();
 658
 659         vector<ClipWithID> clips;
 660         for (unsigned row = start_row; row < playlist_clips->size(); ++row) {
 661                 clips.emplace_back(*playlist_clips->clip_with_id(row));
 662         }
 663         live_player->play(clips);
 664         playlist_clips->set_progress({ { start_row, 0.0f } });
 665         ui->playlist->selectionModel()->clear();
 666         ui->stop_btn->setEnabled(true);
 667         playlist_selection_changed();
 668 }
 669
 670 void MainWindow::next_clicked()
 671 {
 672         live_player->skip_to_next();
 673 }
 674
 675 void MainWindow::stop_clicked()
 676 {
 677         Clip fake_clip;
 678         fake_clip.pts_in = 0;
 679         fake_clip.pts_out = 0;
 680         playlist_clips->set_progress({});
 681         live_player->play(fake_clip);
 682         ui->stop_btn->setEnabled(false);
 683         playlist_selection_changed();
 684 }
 685
 686 void MainWindow::speed_slider_changed(int percent)
 687 {
 688         float speed = percent / 100.0f;
 689         ui->speed_lock_btn->setText(QString::fromStdString(" " + to_string(percent) + "%"));
 690         live_player->set_master_speed(speed);
 691         midi_mapper.set_speed_light(speed);
 692 }
 693
 694 void MainWindow::speed_lock_clicked()
 695 {
 696         // TODO: Make for a less abrupt transition if we're not already at 100%.
 697         ui->speed_slider->setValue(100);  // Also actually sets the master speed and updates the label.
 698         ui->speed_slider->setEnabled(!ui->speed_lock_btn->isChecked());
 699         midi_mapper.set_locked(MIDIMapper::LightState(ui->speed_lock_btn->isChecked()));
 700         lock_blink_timeout->stop();
 701 }
 702
 703 void MainWindow::preview_player_done()
 704 {
 705         preview_playing = false;
 706         enable_or_disable_preview_button();
 707 }
 708
 709 void MainWindow::live_player_done()
 710 {
 711         playlist_clips->set_progress({});
 712         ui->stop_btn->setEnabled(false);
 713         playlist_selection_changed();
 714 }
 715
 716 void MainWindow::live_player_clip_progress(const map<uint64_t, double> &progress, double time_remaining)
 717 {
 718         playlist_clips->set_progress(progress);
 719         set_output_status(format_duration(time_remaining) + " left");
 720 }
 721
 722 void MainWindow::resizeEvent(QResizeEvent *event)
 723 {
 724         QMainWindow::resizeEvent(event);
 725
 726         // Ask for a relayout, but only after the event loop is done doing relayout
 727         // on everything else.
 728         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 729 }
 730
 731 void MainWindow::relayout()
 732 {
 733         ui->live_display->setMinimumWidth(ui->live_display->height() * 16 / 9);
 734         ui->preview_display->setMinimumWidth(ui->preview_display->height() * 16 / 9);
 735 }
 736
 737 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 738 {
 739         constexpr int dead_zone_pixels = 3;  // To avoid that simple clicks get misinterpreted.
 740         int scrub_sensitivity = 100;  // pts units per pixel.
 741         int wheel_sensitivity = 100;  // pts units per degree.
 742
 743         if (event->type() == QEvent::FocusIn || event->type() == QEvent::FocusOut) {
 744                 enable_or_disable_preview_button();
 745                 playlist_selection_changed();
 746                 hidden_jog_column = -1;
 747         }
 748
 749         unsigned stream_idx = ui->preview_display->get_stream_idx();
 750
 751         if (watched == ui->clip_list) {
 752                 if (event->type() == QEvent::FocusOut) {
 753                         highlight_camera_input(-1);
 754                 }
 755                 return false;
 756         }
 757
 758         if (event->type() != QEvent::Wheel) {
 759                 last_mousewheel_camera_row = -1;
 760         }
 761
 762         if (event->type() == QEvent::MouseButtonPress) {
 763                 QMouseEvent *mouse = (QMouseEvent *)event;
 764
 765                 QTableView *destination;
 766                 ScrubType type;
 767
 768                 if (watched == ui->clip_list->viewport()) {
 769                         destination = ui->clip_list;
 770                         type = SCRUBBING_CLIP_LIST;
 771                 } else if (watched == ui->playlist->viewport()) {
 772                         destination = ui->playlist;
 773                         type = SCRUBBING_PLAYLIST;
 774                 } else {
 775                         return false;
 776                 }
 777                 int column = destination->columnAt(mouse->x());
 778                 int row = destination->rowAt(mouse->y());
 779                 if (column == -1 || row == -1)
 780                         return false;
 781
 782                 if (type == SCRUBBING_CLIP_LIST) {
 783                         if (ClipList::Column(column) == ClipList::Column::IN) {
 784                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_in;
 785                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 786                         } else if (ClipList::Column(column) == ClipList::Column::OUT) {
 787                                 scrub_pts_origin = cliplist_clips->clip(row)->pts_out;
 788                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 789                         } else {
 790                                 return false;
 791                         }
 792                 } else {
 793                         if (PlayList::Column(column) == PlayList::Column::IN) {
 794                                 scrub_pts_origin = playlist_clips->clip(row)->pts_in;
 795                                 preview_single_frame(scrub_pts_origin, stream_idx, FIRST_AT_OR_AFTER);
 796                         } else if (PlayList::Column(column) == PlayList::Column::OUT) {
 797                                 scrub_pts_origin = playlist_clips->clip(row)->pts_out;
 798                                 preview_single_frame(scrub_pts_origin, stream_idx, LAST_BEFORE);
 799                         } else {
 800                                 return false;
 801                         }
 802                 }
 803
 804                 scrubbing = true;
 805                 scrub_row = row;
 806                 scrub_column = column;
 807                 scrub_x_origin = mouse->x();
 808                 scrub_type = type;
 809         } else if (event->type() == QEvent::MouseMove) {
 810                 QMouseEvent *mouse = (QMouseEvent *)event;
 811                 if (mouse->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 812                         scrub_sensitivity *= 10;
 813                         wheel_sensitivity *= 10;
 814                 }
 815                 if (mouse->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 816                         scrub_sensitivity /= 10;
 817                         wheel_sensitivity /= 10;
 818                 }
 819                 if (scrubbing) {
 820                         int offset = mouse->x() - scrub_x_origin;
 821                         int adjusted_offset;
 822                         if (offset >= dead_zone_pixels) {
 823                                 adjusted_offset = offset - dead_zone_pixels;
 824                         } else if (offset < -dead_zone_pixels) {
 825                                 adjusted_offset = offset + dead_zone_pixels;
 826                         } else {
 827                                 adjusted_offset = 0;
 828                         }
 829
 830                         int64_t pts = scrub_pts_origin + adjusted_offset * scrub_sensitivity;
 831                         currently_deferring_model_changes = true;
 832                         if (scrub_type == SCRUBBING_CLIP_LIST) {
 833                                 ClipProxy clip = cliplist_clips->mutable_clip(scrub_row);
 834                                 if (scrub_column == int(ClipList::Column::IN)) {
 835                                         current_change_id = "cliplist:in:" + to_string(scrub_row);
 836                                         set_pts_in(pts, current_pts, clip);
 837                                         preview_single_frame(pts, stream_idx, FIRST_AT_OR_AFTER);
 838                                 } else {
 839                                         current_change_id = "cliplist:out" + to_string(scrub_row);
 840                                         pts = std::max(pts, clip->pts_in);
 841                                         pts = std::min(pts, current_pts);
 842                                         clip->pts_out = pts;
 843                                         preview_single_frame(pts, stream_idx, LAST_BEFORE);
 844                                 }
 845                         } else {
 846                                 ClipProxy clip = playlist_clips->mutable_clip(scrub_row);
 847                                 if (scrub_column == int(PlayList::Column::IN)) {
 848                                         current_change_id = "playlist:in:" + to_string(scrub_row);
 849                                         set_pts_in(pts, current_pts, clip);
 850                                         preview_single_frame(pts, clip->stream_idx, FIRST_AT_OR_AFTER);
 851                                 } else {
 852                                         current_change_id = "playlist:out:" + to_string(scrub_row);
 853                                         pts = std::max(pts, clip->pts_in);
 854                                         pts = std::min(pts, current_pts);
 855                                         clip->pts_out = pts;
 856                                         preview_single_frame(pts, clip->stream_idx, LAST_BEFORE);
 857                                 }
 858                         }
 859                         currently_deferring_model_changes = false;
 860
 861                         return true;  // Don't use this mouse movement for selecting things.
 862                 }
 863         } else if (event->type() == QEvent::Wheel) {
 864                 QWheelEvent *wheel = (QWheelEvent *)event;
 865                 int angle_delta = wheel->angleDelta().y();
 866                 if (wheel->modifiers() & Qt::KeyboardModifier::ShiftModifier) {
 867                         scrub_sensitivity *= 10;
 868                         wheel_sensitivity *= 10;
 869                 }
 870                 if (wheel->modifiers() & Qt::KeyboardModifier::AltModifier) {  // Note: Shift + Alt cancel each other out.
 871                         scrub_sensitivity /= 10;
 872                         wheel_sensitivity /= 10;
 873                         angle_delta = wheel->angleDelta().x();  // Qt ickiness.
 874                 }
 875
 876                 QTableView *destination;
 877                 JogDestination jog_destination;
 878                 if (watched == ui->clip_list->viewport()) {
 879                         destination = ui->clip_list;
 880                         jog_destination = JOG_CLIP_LIST;
 881                         last_mousewheel_camera_row = -1;
 882                 } else if (watched == ui->playlist->viewport()) {
 883                         destination = ui->playlist;
 884                         jog_destination = JOG_PLAYLIST;
 885                         if (destination->columnAt(wheel->x()) != int(PlayList::Column::CAMERA)) {
 886                                 last_mousewheel_camera_row = -1;
 887                         }
 888                 } else {
 889                         last_mousewheel_camera_row = -1;
 890                         return false;
 891                 }
 892
 893                 int column = destination->columnAt(wheel->x());
 894                 int row = destination->rowAt(wheel->y());
 895                 if (column == -1 || row == -1)
 896                         return false;
 897
 898                 // Only adjust pts with the wheel if the given row is selected.
 899                 if (!destination->hasFocus() ||
 900                     row != destination->selectionModel()->currentIndex().row()) {
 901                         return false;
 902                 }
 903
 904                 jog_internal(jog_destination, row, column, stream_idx, angle_delta * wheel_sensitivity);
 905                 return true;  // Don't scroll.
 906         } else if (event->type() == QEvent::MouseButtonRelease) {
 907                 scrubbing = false;
 908         }
 909         return false;
 910 }
 911
 912 void MainWindow::preview_single_frame(int64_t pts, unsigned stream_idx, MainWindow::Rounding rounding)
 913 {
 914         if (rounding == LAST_BEFORE) {
 915                 lock_guard<mutex> lock(frame_mu);
 916                 if (frames[stream_idx].empty())
 917                         return;
 918                 auto it = find_last_frame_before(frames[stream_idx], pts);
 919                 if (it != frames[stream_idx].end()) {
 920                         pts = it->pts;
 921                 }
 922         } else {
 923                 assert(rounding == FIRST_AT_OR_AFTER);
 924                 lock_guard<mutex> lock(frame_mu);
 925                 if (frames[stream_idx].empty())
 926                         return;
 927                 auto it = find_first_frame_at_or_after(frames[stream_idx], pts);
 928                 if (it != frames[stream_idx].end()) {
 929                         pts = it->pts;
 930                 }
 931         }
 932
 933         Clip fake_clip;
 934         fake_clip.pts_in = pts;
 935         fake_clip.pts_out = pts + 1;
 936         fake_clip.stream_idx = stream_idx;
 937         preview_player->play(fake_clip);
 938 }
 939
 940 void MainWindow::playlist_selection_changed()
 941 {
 942         enable_or_disable_preview_button();
 943
 944         QItemSelectionModel *selected = ui->playlist->selectionModel();
 945         bool any_selected = ui->playlist->hasFocus() && selected->hasSelection();
 946         ui->playlist_duplicate_btn->setEnabled(any_selected);
 947         ui->playlist_remove_btn->setEnabled(any_selected);
 948         ui->playlist_move_up_btn->setEnabled(
 949                 any_selected && selected->selectedRows().front().row() > 0);
 950         ui->playlist_move_down_btn->setEnabled(
 951                 any_selected && selected->selectedRows().back().row() < int(playlist_clips->size()) - 1);
 952
 953         ui->play_btn->setEnabled(any_selected);
 954         ui->next_btn->setEnabled(ui->stop_btn->isEnabled());  // TODO: Perhaps not if we're on the last clip?
 955         midi_mapper.set_next_ready(ui->next_btn->isEnabled() ? MIDIMapper::On : MIDIMapper::Off);
 956
 957         // NOTE: The hidden button is still reachable by keyboard or MIDI.
 958         if (any_selected) {
 959                 ui->play_btn->setVisible(true);
 960         } else if (ui->stop_btn->isEnabled()) {  // Playing.
 961                 ui->play_btn->setVisible(false);
 962         } else {
 963                 ui->play_btn->setVisible(true);
 964         }
 965         ui->next_btn->setVisible(!ui->play_btn->isVisible());
 966
 967         if (ui->stop_btn->isEnabled()) {  // Playing.
 968                 midi_mapper.set_play_enabled(MIDIMapper::On);
 969         } else if (any_selected) {
 970                 midi_mapper.set_play_enabled(MIDIMapper::Blinking);
 971         } else {
 972                 midi_mapper.set_play_enabled(MIDIMapper::Off);
 973         }
 974
 975         if (!any_selected) {
 976                 set_output_status("paused");
 977         } else {
 978                 vector<ClipWithID> clips;
 979                 for (size_t row = selected->selectedRows().front().row(); row < playlist_clips->size(); ++row) {
 980                         clips.emplace_back(*playlist_clips->clip_with_id(row));
 981                 }
 982                 double remaining = compute_total_time(clips);
 983                 set_output_status(format_duration(remaining) + " ready");
 984         }
 985 }
 986
 987 void MainWindow::clip_list_selection_changed(const QModelIndex &current, const QModelIndex &previous)
 988 {
 989         int camera_selected = -1;
 990         if (cliplist_clips->is_camera_column(current.column())) {
 991                 camera_selected = current.column() - int(ClipList::Column::CAMERA_1);
 992
 993                 // See the comment on hidden_jog_column.
 994                 if (current.row() != previous.row()) {
 995                         hidden_jog_column = -1;
 996                 } else if (hidden_jog_column == -1) {
 997                         hidden_jog_column = previous.column();
 998                 }
 999         } else {
1000                 hidden_jog_column = -1;
1001         }
1002         highlight_camera_input(camera_selected);
1003         enable_or_disable_queue_button();
1004 }
1005
1006 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
1007 {
1008         char time_str[256];
1009         if (estimated_seconds_left < 60.0) {
1010                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
1011         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
1012                 int s = lrintf(estimated_seconds_left);
1013                 int m = s / 60;
1014                 s %= 60;
1015                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
1016         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
1017                 int m = lrintf(estimated_seconds_left / 60.0);
1018                 snprintf(time_str, sizeof(time_str), "%dm", m);
1019         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
1020                 int m = lrintf(estimated_seconds_left / 60.0);
1021                 int h = m / 60;
1022                 m %= 60;
1023                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
1024         } else {  // More than ten hours: Xh.
1025                 int h = lrintf(estimated_seconds_left / 3600.0);
1026                 snprintf(time_str, sizeof(time_str), "%dh", h);
1027         }
1028         char buf[256];
1029         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
1030
1031         std::string label = buf;
1032
1033         post_to_main_thread([this, label] {
1034                 disk_free_label->setText(QString::fromStdString(label));
1035                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
1036         });
1037 }
1038
1039 void MainWindow::midi_mapping_triggered()
1040 {
1041         MIDIMappingDialog(&midi_mapper).exec();
1042 }
1043
1044 void MainWindow::exit_triggered()
1045 {
1046         close();
1047 }
1048
1049 void MainWindow::export_cliplist_clip_multitrack_triggered()
1050 {
1051         QItemSelectionModel *selected = ui->clip_list->selectionModel();
1052         if (!selected->hasSelection()) {
1053                 QMessageBox msgbox;
1054                 msgbox.setText("No clip selected in the clip list. Select one and try exporting again.");
1055                 msgbox.exec();
1056                 return;
1057         }
1058
1059         QModelIndex index = selected->currentIndex();
1060         Clip clip = *cliplist_clips->clip(index.row());
1061         QString filename = QFileDialog::getSaveFileName(this,
1062                 "Export multitrack clip", QString(), tr("Matroska video files (*.mkv)"));
1063         if (filename.isNull()) {
1064                 // Cancel.
1065                 return;
1066         }
1067         if (!filename.endsWith(".mkv")) {
1068                 filename += ".mkv";
1069         }
1070         export_multitrack_clip(filename.toStdString(), clip);
1071 }
1072
1073 void MainWindow::export_playlist_clip_interpolated_triggered()
1074 {
1075         QItemSelectionModel *selected = ui->playlist->selectionModel();
1076         if (!selected->hasSelection()) {
1077                 QMessageBox msgbox;
1078                 msgbox.setText("No clip selected in the playlist. Select one and try exporting again.");
1079                 msgbox.exec();
1080                 return;
1081         }
1082
1083         QString filename = QFileDialog::getSaveFileName(this,
1084                 "Export interpolated clip", QString(), tr("Matroska video files (*.mkv)"));
1085         if (filename.isNull()) {
1086                 // Cancel.
1087                 return;
1088         }
1089         if (!filename.endsWith(".mkv")) {
1090                 filename += ".mkv";
1091         }
1092
1093         vector<Clip> clips;
1094         QModelIndexList rows = selected->selectedRows();
1095         for (QModelIndex index : rows) {
1096                 clips.push_back(*playlist_clips->clip(index.row()));
1097         }
1098         export_interpolated_clip(filename.toStdString(), clips);
1099 }
1100
1101 void MainWindow::manual_triggered()
1102 {
1103         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
1104                 QMessageBox msgbox;
1105                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
1106                 msgbox.exec();
1107         }
1108 }
1109
1110 void MainWindow::about_triggered()
1111 {
1112         AboutDialog("Futatabi", "Multicamera slow motion video server").exec();
1113 }
1114
1115 void MainWindow::undo_triggered()
1116 {
1117         // Finish any deferred action.
1118         if (defer_timeout->isActive()) {
1119                 defer_timeout->stop();
1120                 state_changed(deferred_state);
1121         }
1122
1123         StateProto redo_state;
1124         *redo_state.mutable_clip_list() = cliplist_clips->serialize();
1125         *redo_state.mutable_play_list() = playlist_clips->serialize();
1126         redo_stack.push_back(std::move(redo_state));
1127         ui->redo_action->setEnabled(true);
1128
1129         assert(undo_stack.size() > 1);
1130
1131         // Pop off the current state, which is always at the top of the stack.
1132         undo_stack.pop_back();
1133
1134         StateProto state = undo_stack.back();
1135         ui->undo_action->setEnabled(undo_stack.size() > 1);
1136
1137         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
1138         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
1139
1140         db.store_state(state);
1141 }
1142
1143 void MainWindow::redo_triggered()
1144 {
1145         assert(!redo_stack.empty());
1146
1147         ui->undo_action->setEnabled(true);
1148         ui->redo_action->setEnabled(true);
1149
1150         undo_stack.push_back(std::move(redo_stack.back()));
1151         redo_stack.pop_back();
1152         ui->undo_action->setEnabled(true);
1153         ui->redo_action->setEnabled(!redo_stack.empty());
1154
1155         const StateProto &state = undo_stack.back();
1156         replace_model(ui->clip_list, &cliplist_clips, new ClipList(state.clip_list()));
1157         replace_model(ui->playlist, &playlist_clips, new PlayList(state.play_list()));
1158
1159         db.store_state(state);
1160 }
1161
1162 void MainWindow::quality_toggled(int quality, bool checked)
1163 {
1164         if (!checked) {
1165                 return;
1166         }
1167         global_flags.interpolation_quality = quality;
1168         if (quality != 0 &&  // Turning interpolation off is always possible.
1169             quality != flow_initialized_interpolation_quality) {
1170                 QMessageBox msgbox;
1171                 msgbox.setText(QString::fromStdString(
1172                         "The interpolation quality for the main output cannot be changed at runtime, "
1173                         "except being turned completely off; it will take effect for exported files "
1174                         "only until next restart. The live output quality thus remains at " +
1175                         to_string(flow_initialized_interpolation_quality) + "."));
1176                 msgbox.exec();
1177         }
1178
1179         save_settings();
1180 }
1181
1182 void MainWindow::in_padding_toggled(double seconds, bool checked)
1183 {
1184         if (!checked) {
1185                 return;
1186         }
1187         global_flags.cue_in_point_padding_seconds = seconds;
1188         save_settings();
1189 }
1190
1191 void MainWindow::out_padding_toggled(double seconds, bool checked)
1192 {
1193         if (!checked) {
1194                 return;
1195         }
1196         global_flags.cue_out_point_padding_seconds = seconds;
1197         save_settings();
1198 }
1199
1200 void MainWindow::highlight_camera_input(int stream_idx)
1201 {
1202         for (unsigned i = 0; i < num_cameras; ++i) {
1203                 if (unsigned(stream_idx) == i) {
1204                         displays[i].frame->setStyleSheet("background: rgb(0,255,0)");
1205                 } else {
1206                         displays[i].frame->setStyleSheet("");
1207                 }
1208         }
1209         midi_mapper.highlight_camera_input(stream_idx);
1210 }
1211
1212 void MainWindow::enable_or_disable_preview_button()
1213 {
1214         // Follows the logic in preview_clicked().
1215
1216         if (ui->playlist->hasFocus()) {
1217                 // Allow the playlist as preview iff it has focus and something is selected.
1218                 // TODO: Is this part really relevant?
1219                 QItemSelectionModel *selected = ui->playlist->selectionModel();
1220                 if (selected->hasSelection()) {
1221                         ui->preview_btn->setEnabled(true);
1222                         midi_mapper.set_preview_enabled(preview_playing ? MIDIMapper::On : MIDIMapper::Blinking);
1223                         return;
1224                 }
1225         }
1226
1227         // TODO: Perhaps only enable this if something is actually selected.
1228         ui->preview_btn->setEnabled(!cliplist_clips->empty());
1229         if (preview_playing) {
1230                 midi_mapper.set_preview_enabled(MIDIMapper::On);
1231         } else {
1232                 midi_mapper.set_preview_enabled(cliplist_clips->empty() ? MIDIMapper::Off : MIDIMapper::Blinking);
1233         }
1234 }
1235
1236 void MainWindow::enable_or_disable_queue_button()
1237 {
1238         // Follows the logic in queue_clicked().
1239         // TODO: Perhaps only enable this if something is actually selected.
1240
1241         bool enabled;
1242
1243         if (cliplist_clips->empty()) {
1244                 enabled = false;
1245         } else {
1246                 QItemSelectionModel *selected = ui->clip_list->selectionModel();
1247                 if (!selected->hasSelection()) {
1248                         Clip clip = *cliplist_clips->back();
1249                         enabled = clip.pts_out != -1;
1250                 } else {
1251                         QModelIndex index = selected->currentIndex();
1252                         Clip clip = *cliplist_clips->clip(index.row());
1253                         enabled = clip.pts_out != -1;
1254                 }
1255         }
1256
1257         ui->queue_btn->setEnabled(enabled);
1258         midi_mapper.set_queue_enabled(enabled);
1259 }
1260
1261 void MainWindow::set_output_status(const string &status)
1262 {
1263         ui->live_label->setText(QString::fromStdString("Current output (" + status + ")"));
1264         if (live_player != nullptr) {
1265                 live_player->set_pause_status(status);
1266         }
1267
1268         lock_guard<mutex> lock(queue_status_mu);
1269         queue_status = status;
1270 }
1271
1272 pair<string, string> MainWindow::get_queue_status() const
1273 {
1274         lock_guard<mutex> lock(queue_status_mu);
1275         return { queue_status, "text/plain" };
1276 }
1277
1278 void MainWindow::display_frame(unsigned stream_idx, const FrameOnDisk &frame)
1279 {
1280         if (stream_idx >= MAX_STREAMS) {
1281                 fprintf(stderr, "WARNING: Ignoring too-high stream index %u.\n", stream_idx);
1282                 return;
1283         }
1284         if (stream_idx >= num_cameras) {
1285                 post_to_main_thread_and_wait([this, stream_idx] {
1286                         num_cameras = stream_idx + 1;
1287                         change_num_cameras();
1288                 });
1289         }
1290         displays[stream_idx].display->setFrame(stream_idx, frame);
1291 }
1292
1293 void MainWindow::preview()
1294 {
1295         post_to_main_thread([this] {
1296                 preview_clicked();
1297         });
1298 }
1299
1300 void MainWindow::queue()
1301 {
1302         post_to_main_thread([this] {
1303                 queue_clicked();
1304         });
1305 }
1306
1307 void MainWindow::play()
1308 {
1309         post_to_main_thread([this] {
1310                 play_clicked();
1311         });
1312 }
1313
1314 void MainWindow::next()
1315 {
1316         post_to_main_thread([this] {
1317                 next_clicked();
1318         });
1319 }
1320
1321 void MainWindow::toggle_lock()
1322 {
1323         post_to_main_thread([this] {
1324                 ui->speed_lock_btn->setChecked(!ui->speed_lock_btn->isChecked());
1325                 speed_lock_clicked();
1326         });
1327 }
1328
1329 void MainWindow::jog(int delta)
1330 {
1331         post_to_main_thread([this, delta] {
1332                 int64_t pts_delta = delta * (TIMEBASE / 60);  // One click = frame at 60 fps.
1333                 if (ui->playlist->hasFocus()) {
1334                         QModelIndex selected = ui->playlist->selectionModel()->currentIndex();
1335                         if (selected.column() != -1 && selected.row() != -1) {
1336                                 jog_internal(JOG_PLAYLIST, selected.row(), selected.column(), /*stream_idx=*/-1, pts_delta);
1337                         }
1338                 } else if (ui->clip_list->hasFocus()) {
1339                         QModelIndex selected = ui->clip_list->selectionModel()->currentIndex();
1340                         if (cliplist_clips->is_camera_column(selected.column()) &&
1341                             hidden_jog_column != -1) {
1342                                 // See the definition on hidden_jog_column.
1343                                 selected = selected.sibling(selected.row(), hidden_jog_column);
1344                                 ui->clip_list->selectionModel()->setCurrentIndex(selected, QItemSelectionModel::ClearAndSelect);
1345                                 hidden_jog_column = -1;
1346                         }
1347                         if (selected.column() != -1 && selected.row() != -1) {
1348                                 jog_internal(JOG_CLIP_LIST, selected.row(), selected.column(), ui->preview_display->get_stream_idx(), pts_delta);
1349                         }
1350                 }
1351         });
1352 }
1353
1354 void MainWindow::switch_camera(unsigned camera_idx)
1355 {
1356         post_to_main_thread([this, camera_idx] {
1357                 if (camera_idx < num_cameras) {  // TODO: Also make this change a highlighted clip?
1358                         preview_angle_clicked(camera_idx);
1359                 }
1360         });
1361 }
1362
1363 void MainWindow::set_master_speed(float speed)
1364 {
1365         speed = min(max(speed, 0.1f), 2.0f);
1366
1367         post_to_main_thread([this, speed] {
1368                 if (ui->speed_lock_btn->isChecked()) {
1369                         midi_mapper.set_locked(MIDIMapper::Blinking);
1370                         lock_blink_timeout->start(1000);
1371                         return;
1372                 }
1373
1374                 int percent = lrintf(speed * 100.0f);
1375                 ui->speed_slider->blockSignals(true);
1376                 ui->speed_slider->setValue(percent);
1377                 ui->speed_slider->blockSignals(false);
1378                 ui->speed_lock_btn->setText(QString::fromStdString(" " + to_string(percent) + "%"));
1379
1380                 live_player->set_master_speed(speed);
1381                 midi_mapper.set_speed_light(speed);
1382         });
1383 }
1384
1385 void MainWindow::cue_in()
1386 {
1387         post_to_main_thread([this] { cue_in_clicked(); });
1388 }
1389
1390 void MainWindow::cue_out()
1391 {
1392         post_to_main_thread([this] { cue_out_clicked(); });
1393 }
1394
1395 template<class Model>
1396 void MainWindow::replace_model(QTableView *view, Model **model, Model *new_model)
1397 {
1398         QItemSelectionModel *old_selection_model = view->selectionModel();
1399         view->setModel(new_model);
1400         delete *model;
1401         delete old_selection_model;
1402         *model = new_model;
1403         connect(new_model, &Model::any_content_changed, this, &MainWindow::content_changed);
1404 }
1405
1406 void MainWindow::start_tally()
1407 {
1408         http_reply = http.get(QNetworkRequest(QString::fromStdString(global_flags.tally_url)));
1409         connect(http_reply, &QNetworkReply::finished, this, &MainWindow::tally_received);
1410 }
1411
1412 void MainWindow::tally_received()
1413 {
1414         unsigned time_to_next_tally_ms;
1415         if (http_reply->error()) {
1416                 fprintf(stderr, "HTTP get of '%s' failed: %s\n", global_flags.tally_url.c_str(),
1417                         http_reply->errorString().toStdString().c_str());
1418                 ui->live_frame->setStyleSheet("");
1419                 time_to_next_tally_ms = 1000;
1420         } else {
1421                 string contents = http_reply->readAll().toStdString();
1422                 ui->live_frame->setStyleSheet(QString::fromStdString("background: " + contents));
1423                 time_to_next_tally_ms = 100;
1424         }
1425         http_reply->deleteLater();
1426         http_reply = nullptr;
1427
1428         QTimer::singleShot(time_to_next_tally_ms, this, &MainWindow::start_tally);
1429 }