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

   1 #include "mainwindow.h"
   2
   3 #include <assert.h>
   4 #include <signal.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <QAbstractButton>
   9 #include <QAbstractSlider>
  10 #include <QAction>
  11 #include <QActionGroup>
  12 #include <QApplication>
  13 #include <QBoxLayout>
  14 #include <QCheckBox>
  15 #include <QDesktopServices>
  16 #include <QDial>
  17 #include <QDialog>
  18 #include <QEvent>
  19 #include <QFlags>
  20 #include <QFrame>
  21 #include <QImage>
  22 #include <QInputDialog>
  23 #include <QKeySequence>
  24 #include <QLabel>
  25 #include <QLayoutItem>
  26 #include <QMenuBar>
  27 #include <QMessageBox>
  28 #include <QMouseEvent>
  29 #include <QObject>
  30 #include <QPushButton>
  31 #include <QRect>
  32 #include <QRgb>
  33 #include <QShortcut>
  34 #include <QStackedWidget>
  35 #include <QToolButton>
  36 #include <QWidget>
  37 #include <algorithm>
  38 #include <chrono>
  39 #include <cmath>
  40 #include <functional>
  41 #include <limits>
  42 #include <memory>
  43 #include <ratio>
  44 #include <string>
  45 #include <vector>
  46
  47 #include "shared/aboutdialog.h"
  48 #include "alsa_pool.h"
  49 #include "analyzer.h"
  50 #include "clickable_label.h"
  51 #include "context_menus.h"
  52 #include "correlation_meter.h"
  53 #include "shared/disk_space_estimator.h"
  54 #include "ellipsis_label.h"
  55 #include "flags.h"
  56 #include "glwidget.h"
  57 #include "input_mapping.h"
  58 #include "input_mapping_dialog.h"
  59 #include "lrameter.h"
  60 #include "nageru_midi_mapping.pb.h"
  61 #include "midi_mapping_dialog.h"
  62 #include "mixer.h"
  63 #include "nonlinear_fader.h"
  64 #include "shared/post_to_main_thread.h"
  65 #include "ui_audio_expanded_view.h"
  66 #include "ui_audio_miniview.h"
  67 #include "ui_display.h"
  68 #include "ui_mainwindow.h"
  69 #include "vumeter.h"
  70
  71 using namespace std;
  72 using namespace std::chrono;
  73 using namespace std::placeholders;
  74
  75 Q_DECLARE_METATYPE(std::string);
  76 Q_DECLARE_METATYPE(std::vector<std::string>);
  77
  78 MainWindow *global_mainwindow = nullptr;
  79
  80 // -0.1 dBFS is EBU peak limit. We use it consistently, even for the bus meters
  81 // (which don't calculate interpolate peak, and in general don't follow EBU recommendations).
  82 constexpr float peak_limit_dbfs = -0.1f;
  83
  84 namespace {
  85
  86 void schedule_cut_signal(int ignored)
  87 {
  88         global_mixer->schedule_cut();
  89 }
  90
  91 void quit_signal(int ignored)
  92 {
  93         global_mainwindow->close();
  94 }
  95
  96 void slave_knob(QDial *master, QDial *slave)
  97 {
  98         QWidget::connect(master, &QDial::valueChanged, [slave](int value){
  99                 slave->blockSignals(true);
 100                 slave->setValue(value);
 101                 slave->blockSignals(false);
 102         });
 103         QWidget::connect(slave, &QDial::valueChanged, [master](int value){
 104                 master->setValue(value);
 105         });
 106 }
 107
 108 void slave_checkbox(QCheckBox *master, QCheckBox *slave)
 109 {
 110         QWidget::connect(master, &QCheckBox::stateChanged, [slave](int state){
 111                 slave->blockSignals(true);
 112                 slave->setCheckState(Qt::CheckState(state));
 113                 slave->blockSignals(false);
 114         });
 115         QWidget::connect(slave, &QCheckBox::stateChanged, [master](int state){
 116                 master->setCheckState(Qt::CheckState(state));
 117         });
 118 }
 119
 120 void slave_fader(NonLinearFader *master, NonLinearFader *slave)
 121 {
 122         QWidget::connect(master, &NonLinearFader::dbValueChanged, [slave](double value) {
 123                 slave->blockSignals(true);
 124                 slave->setDbValue(value);
 125                 slave->blockSignals(false);
 126         });
 127         QWidget::connect(slave, &NonLinearFader::dbValueChanged, [master](double value){
 128                 master->setDbValue(value);
 129         });
 130 }
 131
 132 constexpr unsigned DB_WITH_SIGN = 0x1;
 133 constexpr unsigned DB_BARE = 0x2;
 134
 135 string format_db(double db, unsigned flags)
 136 {
 137         string text;
 138         if (flags & DB_WITH_SIGN) {
 139                 if (isfinite(db)) {
 140                         char buf[256];
 141                         snprintf(buf, sizeof(buf), "%+.1f", db);
 142                         text = buf;
 143                 } else if (db < 0.0) {
 144                         text = "-∞";
 145                 } else {
 146                         // Should never happen, really.
 147                         text = "+∞";
 148                 }
 149         } else {
 150                 if (isfinite(db)) {
 151                         char buf[256];
 152                         snprintf(buf, sizeof(buf), "%.1f", db);
 153                         text = buf;
 154                 } else if (db < 0.0) {
 155                         text = "-∞";
 156                 } else {
 157                         // Should never happen, really.
 158                         text = "∞";
 159                 }
 160         }
 161         if (!(flags & DB_BARE)) {
 162                 text += " dB";
 163         }
 164         return text;
 165 }
 166
 167 void set_peak_label(QLabel *peak_label, float peak_db)
 168 {
 169         peak_label->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 170
 171         if (peak_db > peak_limit_dbfs) {
 172                 peak_label->setStyleSheet("QLabel { background-color: red; color: white; }");
 173         } else {
 174                 peak_label->setStyleSheet("");
 175         }
 176 }
 177
 178 string get_bus_desc_label(const InputMapping::Bus &bus)
 179 {
 180         string suffix;
 181         if (bus.device.type == InputSourceType::ALSA_INPUT) {
 182                 ALSAPool::Device::State state = global_audio_mixer->get_alsa_card_state(bus.device.index);
 183                 if (state == ALSAPool::Device::State::STARTING) {
 184                         suffix = " (busy)";
 185                 } else if (state == ALSAPool::Device::State::DEAD) {
 186                         suffix = " (dead)";
 187                 }
 188         }
 189
 190         return bus.name + suffix;
 191 }
 192
 193 }  // namespace
 194
 195 MainWindow::MainWindow()
 196         : ui(new Ui::MainWindow), midi_mapper(this)
 197 {
 198         global_mainwindow = this;
 199         ui->setupUi(this);
 200
 201         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2, _3));
 202         disk_free_label = new QLabel(this);
 203         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 204         ui->menuBar->setCornerWidget(disk_free_label);
 205
 206         QActionGroup *audio_mapping_group = new QActionGroup(this);
 207         ui->simple_audio_mode->setActionGroup(audio_mapping_group);
 208         ui->multichannel_audio_mode->setActionGroup(audio_mapping_group);
 209
 210         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
 211         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
 212
 213         // The menus.
 214         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
 215         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
 216         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
 217         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
 218         connect(ui->open_analyzer_action, &QAction::triggered, this, &MainWindow::open_analyzer_triggered);
 219         connect(ui->simple_audio_mode, &QAction::triggered, this, &MainWindow::simple_audio_mode_triggered);
 220         connect(ui->multichannel_audio_mode, &QAction::triggered, this, &MainWindow::multichannel_audio_mode_triggered);
 221         connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
 222         connect(ui->midi_mapping_action, &QAction::triggered, this, &MainWindow::midi_mapping_triggered);
 223         connect(ui->timecode_stream_action, &QAction::triggered, this, &MainWindow::timecode_stream_triggered);
 224         connect(ui->timecode_stdout_action, &QAction::triggered, this, &MainWindow::timecode_stdout_triggered);
 225
 226         ui->timecode_stream_action->setChecked(global_flags.display_timecode_in_stream);
 227         ui->timecode_stdout_action->setChecked(global_flags.display_timecode_on_stdout);
 228
 229         if (global_flags.x264_video_to_http && isinf(global_flags.x264_crf)) {
 230                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
 231         } else {
 232                 ui->x264_bitrate_action->setEnabled(false);
 233         }
 234
 235         connect(ui->video_menu, &QMenu::aboutToShow, [this]{
 236                 fill_hdmi_sdi_output_device_menu(ui->hdmi_sdi_output_device_menu);
 237                 fill_hdmi_sdi_output_resolution_menu(ui->hdmi_sdi_output_resolution_menu);
 238         });
 239
 240         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 241         // TODO: Make them dynamic.
 242         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
 243         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
 244         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 245
 246         // Aiee...
 247         transition_btn1 = ui->transition_btn1;
 248         transition_btn2 = ui->transition_btn2;
 249         transition_btn3 = ui->transition_btn3;
 250         qRegisterMetaType<string>("std::string");
 251         qRegisterMetaType<vector<string>>("std::vector<std::string>");
 252         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 253         qRegisterMetaType<Mixer::Output>("Mixer::Output");
 254
 255         connect(ui->me_live, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 256         connect(ui->me_preview, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 257
 258         // Hook up the prev/next buttons on the audio views.
 259         connect(ui->compact_prev_page, &QAbstractButton::clicked, this, &MainWindow::prev_page);
 260         connect(ui->compact_next_page, &QAbstractButton::clicked, this, &MainWindow::next_page);
 261         connect(ui->full_prev_page, &QAbstractButton::clicked, this, &MainWindow::prev_page);
 262         connect(ui->full_next_page, &QAbstractButton::clicked, this, &MainWindow::next_page);
 263         connect(ui->video_grid_prev_page, &QAbstractButton::clicked, this, &MainWindow::prev_page);
 264         connect(ui->video_grid_next_page, &QAbstractButton::clicked, this, &MainWindow::next_page);
 265
 266         // And bind the same to PgUp/PgDown.
 267         connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, this, &MainWindow::next_page);
 268         connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, this, &MainWindow::prev_page);
 269
 270         // When the audio view changes, move the previews.
 271         connect(ui->audio_views, &QStackedWidget::currentChanged, bind(&MainWindow::audio_view_changed, this, _1));
 272
 273         if (global_flags.enable_quick_cut_keys) {
 274                 ui->quick_cut_enable_action->setChecked(true);
 275         }
 276         connect(ui->quick_cut_enable_action, &QAction::changed, [this](){
 277                 global_flags.enable_quick_cut_keys = ui->quick_cut_enable_action->isChecked();
 278         });
 279
 280         last_audio_level_callback = steady_clock::now() - seconds(1);
 281
 282         if (!global_flags.midi_mapping_filename.empty()) {
 283                 MIDIMappingProto midi_mapping;
 284                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 285                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 286                                 global_flags.midi_mapping_filename.c_str());
 287                         ::abort();
 288                 }
 289                 midi_mapper.set_midi_mapping(midi_mapping);
 290         }
 291         midi_mapper.refresh_highlights();
 292         midi_mapper.refresh_lights();
 293         if (global_flags.fullscreen) {
 294                 QMainWindow::showFullScreen();
 295         }
 296 }
 297
 298 void MainWindow::prev_page()
 299 {
 300         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 301                 ui->audio_views->setCurrentIndex((ui->audio_views->currentIndex() + 2) % 3);
 302         } else {
 303                 ui->audio_views->setCurrentIndex(2 - ui->audio_views->currentIndex());  // Switch between 0 and 2.
 304         }
 305 }
 306
 307 void MainWindow::next_page()
 308 {
 309         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 310                 ui->audio_views->setCurrentIndex((ui->audio_views->currentIndex() + 1) % 3);
 311         } else {
 312                 ui->audio_views->setCurrentIndex(2 - ui->audio_views->currentIndex());  // Switch between 0 and 2.
 313         }
 314 }
 315
 316 void MainWindow::resizeEvent(QResizeEvent* event)
 317 {
 318         QMainWindow::resizeEvent(event);
 319
 320         // Ask for a relayout, but only after the event loop is done doing relayout
 321         // on everything else.
 322         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 323 }
 324
 325 void MainWindow::mixer_created(Mixer *mixer)
 326 {
 327         // Make the previews.
 328         unsigned num_previews = mixer->get_num_channels();
 329
 330         const char qwerty[] = "QWERTYUIOP";
 331         for (unsigned i = 0; i < num_previews; ++i) {
 332                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 333
 334                 QWidget *preview = new QWidget(this);  // Will be connected to a layout immediately after the loop.
 335                 Ui::Display *ui_display = new Ui::Display;
 336                 ui_display->setupUi(preview);
 337                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 338                 ui_display->display->set_output(output);
 339                 previews.push_back(ui_display);
 340
 341                 // Hook up the click.
 342                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 343
 344                 // Let the theme update the text whenever the resolution or color changed.
 345                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 346                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 347
 348                 // Hook up the keyboard key.
 349                 QShortcut *shortcut = nullptr;
 350                 if (i < 9) {
 351                         shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 352                 } else if (i == 9) {
 353                         shortcut = new QShortcut(QKeySequence(Qt::Key_0), this);
 354                 }
 355                 if (shortcut != nullptr) {
 356                         connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 357                 }
 358
 359                 // Hook up the quick-cut key.
 360                 if (i < strlen(qwerty)) {
 361                         QShortcut *shortcut = new QShortcut(QKeySequence(qwerty[i]), this);
 362                         connect(shortcut, &QShortcut::activated, bind(&MainWindow::quick_cut_activated, this, i));
 363                 }
 364
 365                 // Hook up the white balance button (irrelevant if invisible).
 366                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 367                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 368         }
 369
 370         // Connect the previews to the correct layout.
 371         audio_view_changed(ui->audio_views->currentIndex());
 372
 373         global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
 374
 375         slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
 376         slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
 377         slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
 378         slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
 379         slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
 380
 381         reset_audio_mapping_ui();
 382
 383         // TODO: Fetch all of the values these for completeness,
 384         // not just the enable knobs implied by flags.
 385         ui->limiter_enabled->setChecked(global_audio_mixer->get_limiter_enabled());
 386         ui->makeup_gain_auto_checkbox->setChecked(global_audio_mixer->get_final_makeup_gain_auto());
 387
 388         // Controls used only for simple audio fetch their state from the first bus.
 389         constexpr unsigned simple_bus_index = 0;
 390         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 391                 ui->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(simple_bus_index));
 392                 ui->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(simple_bus_index));
 393                 ui->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(simple_bus_index));
 394                 ui->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(simple_bus_index));
 395                 ui->compressor_threshold_db_display->setText(
 396                         QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(simple_bus_index), DB_WITH_SIGN)));
 397         }
 398         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 399                 global_audio_mixer->set_locut_enabled(simple_bus_index, state == Qt::Checked);
 400                 midi_mapper.refresh_lights();
 401         });
 402         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged,
 403                 bind(&MainWindow::gain_staging_knob_changed, this, simple_bus_index, _1));
 404         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 405                 global_audio_mixer->set_gain_staging_auto(simple_bus_index, state == Qt::Checked);
 406                 midi_mapper.refresh_lights();
 407         });
 408         connect(ui->compressor_threshold_knob, &QDial::valueChanged,
 409                 bind(&MainWindow::compressor_threshold_knob_changed, this, simple_bus_index, _1));
 410         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 411                 global_audio_mixer->set_compressor_enabled(simple_bus_index, state == Qt::Checked);
 412                 midi_mapper.refresh_lights();
 413         });
 414
 415         // Global mastering controls.
 416         QString limiter_threshold_label(
 417                 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
 418         ui->limiter_threshold_db_display->setText(limiter_threshold_label);
 419         ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
 420
 421         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 422         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 423
 424         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 425         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 426                 global_audio_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 427                 midi_mapper.refresh_lights();
 428         });
 429
 430         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 431         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 432                 global_audio_mixer->set_limiter_enabled(state == Qt::Checked);
 433                 midi_mapper.refresh_lights();
 434         });
 435         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 436         // Even though we have a reset button right next to it, the fact that
 437         // the expanded audio view labels are clickable makes it natural to
 438         // click this one as well.
 439         connect(ui->peak_display, &ClickableLabel::clicked, this, &MainWindow::reset_meters_button_clicked);
 440         mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 441
 442         midi_mapper.refresh_highlights();
 443         midi_mapper.refresh_lights();
 444         midi_mapper.start_thread();
 445
 446         analyzer.reset(new Analyzer);
 447
 448         global_mixer->set_theme_menu_callback(bind(&MainWindow::setup_theme_menu, this));
 449         setup_theme_menu();
 450
 451         struct sigaction act;
 452         memset(&act, 0, sizeof(act));
 453         act.sa_handler = schedule_cut_signal;
 454         act.sa_flags = SA_RESTART;
 455         sigaction(SIGHUP, &act, nullptr);
 456
 457         // Mostly for debugging. Don't override SIGINT, that's so evil if
 458         // shutdown isn't instant.
 459         memset(&act, 0, sizeof(act));
 460         act.sa_handler = quit_signal;
 461         act.sa_flags = SA_RESTART;
 462         sigaction(SIGUSR1, &act, nullptr);
 463 }
 464
 465 void MainWindow::reset_audio_mapping_ui()
 466 {
 467         bool simple = (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE);
 468
 469         ui->simple_audio_mode->setChecked(simple);
 470         ui->multichannel_audio_mode->setChecked(!simple);
 471         ui->input_mapping_action->setEnabled(!simple);
 472         ui->midi_mapping_action->setEnabled(!simple);
 473
 474         ui->locut_enabled->setVisible(simple);
 475         ui->gainstaging_label->setVisible(simple);
 476         ui->gainstaging_knob->setVisible(simple);
 477         ui->gainstaging_db_display->setVisible(simple);
 478         ui->gainstaging_auto_checkbox->setVisible(simple);
 479         ui->compressor_threshold_label->setVisible(simple);
 480         ui->compressor_threshold_knob->setVisible(simple);
 481         ui->compressor_threshold_db_display->setVisible(simple);
 482         ui->compressor_enabled->setVisible(simple);
 483
 484         setup_audio_miniview();
 485         setup_audio_expanded_view();
 486
 487         if (simple) {
 488                 ui->compact_label->setText("Compact audio view (1/2)  ");
 489                 ui->video_grid_label->setText("Video grid display (2/2)  ");
 490                 if (ui->audio_views->currentIndex() == 1) {
 491                         // Full audio view is not available in simple mode.
 492                         ui->audio_views->setCurrentIndex(0);
 493                 }
 494         } else {
 495                 ui->compact_label->setText("Compact audio view (1/3)  ");
 496                 ui->full_label->setText("Full audio view (2/3)  ");
 497                 ui->video_grid_label->setText("Video grid display (3/3)  ");
 498         }
 499
 500         midi_mapper.refresh_highlights();
 501         midi_mapper.refresh_lights();
 502 }
 503
 504 void MainWindow::setup_audio_miniview()
 505 {
 506         // Remove any existing channels.
 507         for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
 508                 delete item->widget();
 509                 delete item;
 510         }
 511         audio_miniviews.clear();
 512
 513         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 514                 return;
 515         }
 516
 517         // Set up brand new ones from the input mapping.
 518         InputMapping mapping = global_audio_mixer->get_input_mapping();
 519         audio_miniviews.resize(mapping.buses.size());
 520         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 521                 QWidget *channel = new QWidget(this);
 522                 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
 523                 ui_audio_miniview->setupUi(channel);
 524                 ui_audio_miniview->bus_desc_label->setFullText(
 525                         QString::fromStdString(get_bus_desc_label(mapping.buses[bus_index])));
 526                 audio_miniviews[bus_index] = ui_audio_miniview;
 527
 528                 // Set up the peak meter.
 529                 VUMeter *peak_meter = ui_audio_miniview->peak_meter;
 530                 peak_meter->set_min_level(-30.0f);
 531                 peak_meter->set_max_level(0.0f);
 532                 peak_meter->set_ref_level(0.0f);
 533
 534                 ui_audio_miniview->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 535
 536                 ui->faders->addWidget(channel);
 537
 538                 connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
 539                         bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
 540                 connect(ui_audio_miniview->peak_display_label, &ClickableLabel::clicked,
 541                         [bus_index]() {
 542                                 global_audio_mixer->reset_peak(bus_index);
 543                         });
 544         }
 545 }
 546
 547 void MainWindow::setup_audio_expanded_view()
 548 {
 549         // Remove any existing channels.
 550         for (QLayoutItem *item; (item = ui->buses->takeAt(0)) != nullptr; ) {
 551                 delete item->widget();
 552                 delete item;
 553         }
 554         audio_expanded_views.clear();
 555
 556         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 557                 return;
 558         }
 559
 560         // Set up brand new ones from the input mapping.
 561         InputMapping mapping = global_audio_mixer->get_input_mapping();
 562         audio_expanded_views.resize(mapping.buses.size());
 563         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 564                 QWidget *channel = new QWidget(this);
 565                 Ui::AudioExpandedView *ui_audio_expanded_view = new Ui::AudioExpandedView;
 566                 ui_audio_expanded_view->setupUi(channel);
 567                 ui_audio_expanded_view->bus_desc_label->setFullText(
 568                         QString::fromStdString(get_bus_desc_label(mapping.buses[bus_index])));
 569                 audio_expanded_views[bus_index] = ui_audio_expanded_view;
 570                 update_stereo_knob_and_label(bus_index, lrintf(100.0f * global_audio_mixer->get_stereo_width(bus_index)));
 571                 update_eq_label(bus_index, EQ_BAND_TREBLE, global_audio_mixer->get_eq(bus_index, EQ_BAND_TREBLE));
 572                 update_eq_label(bus_index, EQ_BAND_MID, global_audio_mixer->get_eq(bus_index, EQ_BAND_MID));
 573                 update_eq_label(bus_index, EQ_BAND_BASS, global_audio_mixer->get_eq(bus_index, EQ_BAND_BASS));
 574                 ui_audio_expanded_view->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 575                 ui_audio_expanded_view->mute_button->setChecked(global_audio_mixer->get_mute(bus_index));
 576                 connect(ui_audio_expanded_view->mute_button, &QPushButton::toggled,
 577                         bind(&MainWindow::mute_button_toggled, this, bus_index, _1));
 578                 ui->buses->addWidget(channel);
 579
 580                 ui_audio_expanded_view->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(bus_index));
 581                 connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 582                         global_audio_mixer->set_locut_enabled(bus_index, state == Qt::Checked);
 583                         midi_mapper.refresh_lights();
 584                 });
 585
 586                 connect(ui_audio_expanded_view->stereo_width_knob, &QDial::valueChanged,
 587                         bind(&MainWindow::stereo_width_knob_changed, this, bus_index, _1));
 588
 589                 connect(ui_audio_expanded_view->treble_knob, &QDial::valueChanged,
 590                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_TREBLE, _1));
 591                 connect(ui_audio_expanded_view->mid_knob, &QDial::valueChanged,
 592                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_MID, _1));
 593                 connect(ui_audio_expanded_view->bass_knob, &QDial::valueChanged,
 594                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_BASS, _1));
 595
 596                 ui_audio_expanded_view->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(bus_index));
 597                 ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(bus_index));
 598                 ui_audio_expanded_view->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(bus_index));
 599
 600                 connect(ui_audio_expanded_view->gainstaging_knob, &QAbstractSlider::valueChanged, bind(&MainWindow::gain_staging_knob_changed, this, bus_index, _1));
 601                 connect(ui_audio_expanded_view->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, bus_index](int state){
 602                         global_audio_mixer->set_gain_staging_auto(bus_index, state == Qt::Checked);
 603                         midi_mapper.refresh_lights();
 604                 });
 605
 606                 connect(ui_audio_expanded_view->compressor_threshold_knob, &QDial::valueChanged, bind(&MainWindow::compressor_threshold_knob_changed, this, bus_index, _1));
 607                 connect(ui_audio_expanded_view->compressor_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 608                         global_audio_mixer->set_compressor_enabled(bus_index, state == Qt::Checked);
 609                         midi_mapper.refresh_lights();
 610                 });
 611
 612                 slave_fader(audio_miniviews[bus_index]->fader, ui_audio_expanded_view->fader);
 613
 614                 // Set up the peak meter.
 615                 VUMeter *peak_meter = ui_audio_expanded_view->peak_meter;
 616                 peak_meter->set_min_level(-30.0f);
 617                 peak_meter->set_max_level(0.0f);
 618                 peak_meter->set_ref_level(0.0f);
 619
 620                 connect(ui_audio_expanded_view->peak_display_label, &ClickableLabel::clicked,
 621                         [this, bus_index]() {
 622                                 global_audio_mixer->reset_peak(bus_index);
 623                                 midi_mapper.refresh_lights();
 624                         });
 625         }
 626
 627         update_cutoff_labels(global_audio_mixer->get_locut_cutoff());
 628 }
 629
 630 void MainWindow::mixer_shutting_down()
 631 {
 632         ui->me_live->shutdown();
 633         ui->me_preview->shutdown();
 634
 635         for (Ui::Display *display : previews) {
 636                 display->display->shutdown();
 637         }
 638
 639         analyzer->mixer_shutting_down();
 640 }
 641
 642 void MainWindow::cut_triggered()
 643 {
 644         global_mixer->schedule_cut();
 645 }
 646
 647 void MainWindow::x264_bitrate_triggered()
 648 {
 649         bool ok;
 650         int new_bitrate = QInputDialog::getInt(this, "Change x264 bitrate", "Choose new bitrate for x264 HTTP output (from 100–100,000 kbit/sec):", global_flags.x264_bitrate, /*min=*/100, /*max=*/100000, /*step=*/100, &ok);
 651         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 652                 global_flags.x264_bitrate = new_bitrate;
 653                 global_mixer->change_x264_bitrate(new_bitrate);
 654         }
 655 }
 656
 657 void MainWindow::exit_triggered()
 658 {
 659         close();
 660 }
 661
 662 void MainWindow::manual_triggered()
 663 {
 664         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 665                 QMessageBox msgbox;
 666                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 667                 msgbox.exec();
 668         }
 669 }
 670
 671 void MainWindow::about_triggered()
 672 {
 673         AboutDialog("Nageru", "Realtime video mixer").exec();
 674 }
 675
 676 void MainWindow::open_analyzer_triggered()
 677 {
 678         analyzer->show();
 679 }
 680
 681 void MainWindow::simple_audio_mode_triggered()
 682 {
 683         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 684                 return;
 685         }
 686         unsigned card_index = global_audio_mixer->get_simple_input();
 687         if (card_index == numeric_limits<unsigned>::max()) {
 688                 QMessageBox::StandardButton reply =
 689                         QMessageBox::question(this,
 690                                 "Mapping too complex",
 691                                 "The current audio mapping is too complicated to be representable in simple mode, "
 692                                         "and will be discarded if you proceed. Really go to simple audio mode?",
 693                                 QMessageBox::Yes | QMessageBox::No);
 694                 if (reply == QMessageBox::No) {
 695                         ui->simple_audio_mode->setChecked(false);
 696                         ui->multichannel_audio_mode->setChecked(true);
 697                         return;
 698                 }
 699                 card_index = 0;
 700         }
 701         global_audio_mixer->set_simple_input(/*card_index=*/card_index);
 702         reset_audio_mapping_ui();
 703 }
 704
 705 void MainWindow::multichannel_audio_mode_triggered()
 706 {
 707         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 708                 return;
 709         }
 710
 711         // Take the generated input mapping from the simple input,
 712         // and set it as a normal multichannel mapping, which causes
 713         // the mode to go to multichannel.
 714         global_audio_mixer->set_input_mapping(global_audio_mixer->get_input_mapping());
 715         reset_audio_mapping_ui();
 716 }
 717
 718 void MainWindow::input_mapping_triggered()
 719 {
 720         if (InputMappingDialog().exec() == QDialog::Accepted) {
 721                 setup_audio_miniview();
 722                 setup_audio_expanded_view();
 723         }
 724         midi_mapper.refresh_highlights();
 725         midi_mapper.refresh_lights();
 726 }
 727
 728 void MainWindow::midi_mapping_triggered()
 729 {
 730         MIDIMappingDialog(&midi_mapper).exec();
 731 }
 732
 733 void MainWindow::timecode_stream_triggered()
 734 {
 735         global_mixer->set_display_timecode_in_stream(ui->timecode_stream_action->isChecked());
 736 }
 737
 738 void MainWindow::timecode_stdout_triggered()
 739 {
 740         global_mixer->set_display_timecode_on_stdout(ui->timecode_stdout_action->isChecked());
 741 }
 742
 743 void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
 744 {
 745         if (bus_index == 0) {
 746                 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 747         }
 748         if (bus_index < audio_expanded_views.size()) {
 749                 audio_expanded_views[bus_index]->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 750         }
 751
 752         float gain_db = value * 0.1f;
 753         global_audio_mixer->set_gain_staging_db(bus_index, gain_db);
 754
 755         // The label will be updated by the audio level callback.
 756 }
 757
 758 void MainWindow::final_makeup_gain_knob_changed(int value)
 759 {
 760         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 761
 762         float gain_db = value * 0.1f;
 763         global_audio_mixer->set_final_makeup_gain_db(gain_db);
 764
 765         // The label will be updated by the audio level callback.
 766 }
 767
 768 void MainWindow::cutoff_knob_changed(int value)
 769 {
 770         float octaves = value * 0.1f;
 771         float cutoff_hz = 20.0 * pow(2.0, octaves);
 772         global_audio_mixer->set_locut_cutoff(cutoff_hz);
 773         update_cutoff_labels(cutoff_hz);
 774 }
 775
 776 void MainWindow::update_cutoff_labels(float cutoff_hz)
 777 {
 778         char buf[256];
 779         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 780         ui->locut_cutoff_display->setText(buf);
 781         ui->locut_cutoff_display_2->setText(buf);
 782
 783         for (unsigned bus_index = 0; bus_index < audio_expanded_views.size(); ++bus_index) {
 784                 audio_expanded_views[bus_index]->locut_enabled->setText(
 785                         QString("Lo-cut: ") + buf);
 786         }
 787 }
 788
 789 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left, double file_length_seconds)
 790 {
 791         char time_str[256];
 792         if (estimated_seconds_left < 60.0) {
 793                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 794         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 795                 int s = lrintf(estimated_seconds_left);
 796                 int m = s / 60;
 797                 s %= 60;
 798                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 799         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 800                 int m = lrintf(estimated_seconds_left / 60.0);
 801                 snprintf(time_str, sizeof(time_str), "%dm", m);
 802         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 803                 int m = lrintf(estimated_seconds_left / 60.0);
 804                 int h = m / 60;
 805                 m %= 60;
 806                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 807         } else {  // More than ten hours: Xh.
 808                 int h = lrintf(estimated_seconds_left / 3600.0);
 809                 snprintf(time_str, sizeof(time_str), "%dh", h);
 810         }
 811         char buf[256];
 812         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 813
 814         // NOTE: The default formatter does not use file_length_seconds for anything,
 815         // but the theme might want to do so.
 816         std::string label = global_mixer->format_status_line(buf, file_length_seconds);
 817
 818         post_to_main_thread([this, label]{
 819                 disk_free_label->setText(QString::fromStdString(label));
 820                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 821         });
 822 }
 823
 824 void MainWindow::stereo_width_knob_changed(unsigned bus_index, int value)
 825 {
 826         float stereo_width = value * 0.01f;
 827         global_audio_mixer->set_stereo_width(bus_index, stereo_width);
 828
 829         update_stereo_label(bus_index, value);
 830 }
 831
 832 void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
 833 {
 834         float gain_db = value * 0.1f;
 835         global_audio_mixer->set_eq(bus_index, band, gain_db);
 836
 837         update_eq_label(bus_index, band, gain_db);
 838 }
 839
 840 void MainWindow::update_stereo_knob_and_label(unsigned bus_index, int stereo_width_percent)
 841 {
 842         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 843
 844         if (global_audio_mixer->is_mono(bus_index)) {
 845                 view->stereo_width_knob->setEnabled(false);
 846                 view->stereo_width_label->setEnabled(false);
 847         } else {
 848                 view->stereo_width_knob->setEnabled(true);
 849                 view->stereo_width_label->setEnabled(true);
 850         }
 851         view->stereo_width_knob->setValue(stereo_width_percent);
 852         update_stereo_label(bus_index, stereo_width_percent);
 853 }
 854
 855 void MainWindow::update_stereo_label(unsigned bus_index, int stereo_width_percent)
 856 {
 857         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 858
 859         if (global_audio_mixer->is_mono(bus_index)) {
 860                 view->stereo_width_label->setText("Mono");
 861         } else {
 862                 char buf[256];
 863                 snprintf(buf, sizeof(buf), "Stereo: %d%%", stereo_width_percent);
 864                 view->stereo_width_label->setText(buf);
 865         }
 866 }
 867
 868 void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
 869 {
 870         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 871         string db_string = format_db(gain_db, DB_WITH_SIGN);
 872         switch (band) {
 873         case EQ_BAND_TREBLE:
 874                 view->treble_label->setText(QString::fromStdString("Treble: " + db_string));
 875                 break;
 876         case EQ_BAND_MID:
 877                 view->mid_label->setText(QString::fromStdString("Mid: " + db_string));
 878                 break;
 879         case EQ_BAND_BASS:
 880                 view->bass_label->setText(QString::fromStdString("Bass: " + db_string));
 881                 break;
 882         default:
 883                 assert(false);
 884         }
 885 }
 886
 887 void MainWindow::setup_theme_menu()
 888 {
 889         Theme::MenuEntry *root_menu = global_mixer->get_theme_menu();
 890
 891         // Remove the old menu, if any.
 892         if (theme_menu != nullptr) {
 893                 ui->menuBar->removeAction(theme_menu->menuAction());
 894                 theme_menu = nullptr;
 895         }
 896
 897         if (root_menu != nullptr) {
 898                 assert(root_menu->is_submenu);
 899                 if (!root_menu->submenu.empty()) {
 900                         theme_menu = new QMenu("&Theme");
 901                         fill_menu_from_theme_menu(root_menu->submenu, theme_menu);
 902                         ui->menuBar->insertMenu(ui->menu_Help->menuAction(), theme_menu);
 903                 }
 904         }
 905 }
 906
 907 void MainWindow::fill_menu_from_theme_menu(const vector<unique_ptr<Theme::MenuEntry>> &entries, QMenu *menu)
 908 {
 909         for (const unique_ptr<Theme::MenuEntry> &entry : entries) {
 910                 if (entry->is_submenu) {
 911                         QMenu *submenu = new QMenu(QString::fromStdString(entry->text));
 912                         fill_menu_from_theme_menu(entry->submenu, submenu);
 913                         menu->addMenu(submenu);
 914                         continue;
 915                 }
 916
 917                 QAction *action = menu->addAction(QString::fromStdString(entry->text));
 918                 if (entry->entry.flags == Theme::MenuEntry::CHECKABLE) {
 919                         action->setCheckable(true);
 920                 } else if (entry->entry.flags == Theme::MenuEntry::CHECKED) {
 921                         action->setCheckable(true);
 922                         action->setChecked(true);
 923                 }
 924                 connect(action, &QAction::triggered, [lua_ref = entry->entry.lua_ref] {
 925                         global_mixer->theme_menu_entry_clicked(lua_ref);
 926                 });
 927         }
 928 }
 929
 930 void MainWindow::limiter_threshold_knob_changed(int value)
 931 {
 932         float threshold_dbfs = value * 0.1f;
 933         global_audio_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 934         ui->limiter_threshold_db_display->setText(
 935                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 936         ui->limiter_threshold_db_display_2->setText(
 937                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 938 }
 939
 940 void MainWindow::compressor_threshold_knob_changed(unsigned bus_index, int value)
 941 {
 942         float threshold_dbfs = value * 0.1f;
 943         global_audio_mixer->set_compressor_threshold_dbfs(bus_index, threshold_dbfs);
 944
 945         QString label(QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 946         if (bus_index == 0) {
 947                 ui->compressor_threshold_db_display->setText(label);
 948         }
 949         if (bus_index < audio_expanded_views.size()) {
 950                 audio_expanded_views[bus_index]->compressor_threshold_db_display->setText(label);
 951         }
 952 }
 953
 954 void MainWindow::mini_fader_changed(int bus, double volume_db)
 955 {
 956         QString label(QString::fromStdString(format_db(volume_db, DB_WITH_SIGN)));
 957         audio_miniviews[bus]->fader_label->setText(label);
 958         audio_expanded_views[bus]->fader_label->setText(label);
 959
 960         global_audio_mixer->set_fader_volume(bus, volume_db);
 961 }
 962
 963 void MainWindow::mute_button_toggled(int bus, bool checked)
 964 {
 965         global_audio_mixer->set_mute(bus, checked);
 966         midi_mapper.refresh_lights();
 967 }
 968
 969 void MainWindow::reset_meters_button_clicked()
 970 {
 971         global_audio_mixer->reset_meters();
 972         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
 973         ui->peak_display->setStyleSheet("");
 974 }
 975
 976 void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<AudioMixer::BusLevel> bus_levels,
 977                                       float global_level_lufs,
 978                                       float range_low_lufs, float range_high_lufs,
 979                                       float final_makeup_gain_db,
 980                                       float correlation)
 981 {
 982         steady_clock::time_point now = steady_clock::now();
 983
 984         // The meters are somewhat inefficient to update. Only update them
 985         // every 100 ms or so (we get updates every 5–20 ms). Note that this
 986         // means that the digital peak meters are ever so slightly too low
 987         // (each update won't be a faithful representation of the highest peak
 988         // since the previous update, since there are frames we won't draw),
 989         // but the _peak_ of the peak meters will be correct (it's tracked in
 990         // AudioMixer, not here), and that's much more important.
 991         double last_update_age = duration<double>(now - last_audio_level_callback).count();
 992         if (last_update_age < 0.100) {
 993                 return;
 994         }
 995         last_audio_level_callback = now;
 996
 997         post_to_main_thread([=]() {
 998                 ui->vu_meter->set_level(level_lufs);
 999                 for (unsigned bus_index = 0; bus_index < bus_levels.size(); ++bus_index) {
1000                         if (bus_index < audio_miniviews.size()) {
1001                                 const AudioMixer::BusLevel &level = bus_levels[bus_index];
1002                                 Ui::AudioMiniView *miniview = audio_miniviews[bus_index];
1003                                 miniview->peak_meter->set_level(
1004                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
1005                                 miniview->peak_meter->set_peak(
1006                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
1007                                 set_peak_label(miniview->peak_display_label, level.historic_peak_dbfs);
1008
1009                                 Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
1010                                 view->peak_meter->set_level(
1011                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
1012                                 view->peak_meter->set_peak(
1013                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
1014                                 view->reduction_meter->set_reduction_db(level.compressor_attenuation_db);
1015                                 view->gainstaging_knob->blockSignals(true);
1016                                 view->gainstaging_knob->setValue(lrintf(level.gain_staging_db * 10.0f));
1017                                 view->gainstaging_knob->blockSignals(false);
1018                                 view->gainstaging_db_display->setText(
1019                                         QString("Gain: ") +
1020                                         QString::fromStdString(format_db(level.gain_staging_db, DB_WITH_SIGN)));
1021                                 set_peak_label(view->peak_display_label, level.historic_peak_dbfs);
1022
1023                                 midi_mapper.set_has_peaked(bus_index, level.historic_peak_dbfs >= -0.1f);
1024                         }
1025                 }
1026                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
1027                 ui->correlation_meter->set_correlation(correlation);
1028
1029                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
1030                 set_peak_label(ui->peak_display, peak_db);
1031
1032                 // NOTE: Will be invisible when using multitrack audio.
1033                 if (!bus_levels.empty()) {
1034                         ui->gainstaging_knob->blockSignals(true);
1035                         ui->gainstaging_knob->setValue(lrintf(bus_levels[0].gain_staging_db * 10.0f));
1036                         ui->gainstaging_knob->blockSignals(false);
1037                         ui->gainstaging_db_display->setText(
1038                                 QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
1039                 }
1040
1041                 ui->makeup_gain_knob->blockSignals(true);
1042                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
1043                 ui->makeup_gain_knob->blockSignals(false);
1044                 ui->makeup_gain_db_display->setText(
1045                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
1046                 ui->makeup_gain_db_display_2->setText(
1047                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
1048
1049                 // Peak labels could have changed.
1050                 midi_mapper.refresh_lights();
1051         });
1052 }
1053
1054 void MainWindow::relayout()
1055 {
1056         int height = ui->vertical_layout->geometry().height();
1057         if (height <= 0) {
1058                 // Seemingly this can happen and must be ignored.
1059                 return;
1060         }
1061
1062         double remaining_height = height;
1063
1064         // Allocate the height; the most important part is to keep the main displays
1065         // at the right aspect if at all possible.
1066         double me_width = ui->me_preview->width();
1067         double me_height = me_width * double(global_flags.height) / double(global_flags.width) + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
1068
1069         // TODO: Scale the widths when we need to do this.
1070         if (me_height / double(height) > 0.8) {
1071                 me_height = height * 0.8;
1072         }
1073         remaining_height -= me_height + ui->vertical_layout->spacing();
1074
1075         // Space between the M/E displays and the audio strip.
1076         remaining_height -= ui->vertical_layout->spacing();
1077
1078         // The label above the audio strip.
1079         double compact_label_height = ui->compact_label->minimumHeight() +
1080                 ui->compact_audio_layout->spacing();
1081         remaining_height -= compact_label_height;
1082
1083         // The previews will be constrained by the remaining height, and the width.
1084         double preview_label_height = previews[0]->label->minimumSize().height() +
1085                 previews[0]->main_vertical_layout->spacing();
1086         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
1087         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * double(global_flags.height) / double(global_flags.width));
1088         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
1089
1090         ui->vertical_layout->setStretch(0, lrintf(me_height));
1091         ui->vertical_layout->setStretch(1,
1092                 lrintf(compact_label_height) +
1093                 lrintf(remaining_height) +
1094                 lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
1095
1096         ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
1097         ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
1098         ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
1099
1100         if (current_audio_view == 0) {  // Compact audio view.
1101                 // Set the widths for the previews.
1102                 double preview_width = preview_height * double(global_flags.width) / double(global_flags.height);
1103                 for (unsigned i = 0; i < previews.size(); ++i) {
1104                         ui->preview_displays->setStretch(i, lrintf(preview_width));
1105                 }
1106
1107                 // The preview horizontal spacer.
1108                 double remaining_preview_width = preview_total_width - previews.size() * preview_width;
1109                 ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
1110         } else if (current_audio_view == 2) {  // Video grid view.
1111                 // QGridLayout doesn't do it for us, since we need to be able to remove rows
1112                 // or columns as the grid changes, and it won't do that. Thus, position everything
1113                 // by hand.
1114                 constexpr int spacing = 6;
1115                 int grid_width = ui->preview_displays_grid->geometry().width();
1116                 int grid_height = ui->preview_displays_grid->geometry().height();
1117                 int best_preview_width = 0;
1118                 unsigned best_num_rows = 1, best_num_cols = 1;
1119                 for (unsigned num_rows = 1; num_rows <= previews.size(); ++num_rows) {
1120                         int num_cols = (previews.size() + num_rows - 1) / num_rows;
1121
1122                         int max_preview_height = (grid_height - spacing * (num_rows - 1)) / num_rows - preview_label_height;
1123                         int max_preview_width = (grid_width - spacing * (num_cols - 1)) / num_cols;
1124                         int preview_width = std::min<int>(max_preview_width, max_preview_height * double(global_flags.width) / double(global_flags.height));
1125
1126                         if (preview_width > best_preview_width) {
1127                                 best_preview_width = preview_width;
1128                                 best_num_rows = num_rows;
1129                                 best_num_cols = num_cols;
1130                         }
1131                 }
1132
1133                 double cell_height = lrintf(best_preview_width * double(global_flags.height) / double(global_flags.width)) + preview_label_height;
1134                 remaining_height = grid_height - best_num_rows * cell_height - (best_num_rows - 1) * spacing;
1135                 int cell_width = best_preview_width;
1136                 int remaining_width = grid_width - best_num_cols * cell_width - (best_num_cols - 1) * spacing;
1137
1138                 for (unsigned i = 0; i < previews.size(); ++i) {
1139                         int col_idx = i % best_num_cols;
1140                         int row_idx = i / best_num_cols;
1141
1142                         double top = remaining_height * 0.5f + row_idx * (cell_height + spacing);
1143                         double bottom = top + cell_height;
1144                         double left = remaining_width * 0.5f + col_idx * (cell_width + spacing);
1145                         double right = left + cell_width;
1146
1147                         QRect rect;
1148                         rect.setTop(lrintf(top));
1149                         rect.setBottom(lrintf(bottom));
1150                         rect.setLeft(lrintf(left));
1151                         rect.setRight(lrintf(right));
1152
1153                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1154                         display->setGeometry(rect);
1155                         display->show();
1156                 }
1157         }
1158 }
1159
1160 void MainWindow::set_locut(float value)
1161 {
1162         set_relative_value(ui->locut_cutoff_knob, value);
1163 }
1164
1165 void MainWindow::set_limiter_threshold(float value)
1166 {
1167         set_relative_value(ui->limiter_threshold_knob, value);
1168 }
1169
1170 void MainWindow::set_makeup_gain(float value)
1171 {
1172         set_relative_value(ui->makeup_gain_knob, value);
1173 }
1174
1175 void MainWindow::set_stereo_width(unsigned bus_idx, float value)
1176 {
1177         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::stereo_width_knob, value);
1178 }
1179
1180 void MainWindow::set_treble(unsigned bus_idx, float value)
1181 {
1182         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, value);
1183 }
1184
1185 void MainWindow::set_mid(unsigned bus_idx, float value)
1186 {
1187         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, value);
1188 }
1189
1190 void MainWindow::set_bass(unsigned bus_idx, float value)
1191 {
1192         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, value);
1193 }
1194
1195 void MainWindow::set_gain(unsigned bus_idx, float value)
1196 {
1197         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, value);
1198 }
1199
1200 void MainWindow::set_compressor_threshold(unsigned bus_idx, float value)
1201 {
1202         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, value);
1203 }
1204
1205 void MainWindow::set_fader(unsigned bus_idx, float value)
1206 {
1207         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::fader, value);
1208 }
1209
1210 void MainWindow::toggle_mute(unsigned bus_idx)
1211 {
1212         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button);
1213 }
1214
1215 void MainWindow::toggle_locut(unsigned bus_idx)
1216 {
1217         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled);
1218 }
1219
1220 void MainWindow::toggle_auto_gain_staging(unsigned bus_idx)
1221 {
1222         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox);
1223 }
1224
1225 void MainWindow::toggle_compressor(unsigned bus_idx)
1226 {
1227         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled);
1228 }
1229
1230 void MainWindow::clear_peak(unsigned bus_idx)
1231 {
1232         post_to_main_thread([=]{
1233                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1234                         global_audio_mixer->reset_peak(bus_idx);
1235                         midi_mapper.set_has_peaked(bus_idx, false);
1236                         midi_mapper.refresh_lights();
1237                 }
1238         });
1239 }
1240
1241 void MainWindow::clear_all_highlights()
1242 {
1243         post_to_main_thread([this]{
1244                 highlight_locut(false);
1245                 highlight_limiter_threshold(false);
1246                 highlight_makeup_gain(false);
1247                 highlight_toggle_limiter(false);
1248                 highlight_toggle_auto_makeup_gain(false);
1249                 for (unsigned bus_idx = 0; bus_idx < audio_expanded_views.size(); ++bus_idx) {
1250                         highlight_treble(bus_idx, false);
1251                         highlight_mid(bus_idx, false);
1252                         highlight_bass(bus_idx, false);
1253                         highlight_gain(bus_idx, false);
1254                         highlight_compressor_threshold(bus_idx, false);
1255                         highlight_fader(bus_idx, false);
1256                         highlight_mute(bus_idx, false);
1257                         highlight_toggle_locut(bus_idx, false);
1258                         highlight_toggle_auto_gain_staging(bus_idx, false);
1259                         highlight_toggle_compressor(bus_idx, false);
1260                 }
1261         });
1262 }
1263
1264 void MainWindow::toggle_limiter()
1265 {
1266         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1267                 ui->limiter_enabled->click();
1268         }
1269 }
1270
1271 void MainWindow::toggle_auto_makeup_gain()
1272 {
1273         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1274                 ui->makeup_gain_auto_checkbox->click();
1275         }
1276 }
1277
1278 void MainWindow::switch_video_channel(int channel_number)
1279 {
1280         global_mixer->channel_clicked(channel_number);
1281 }
1282
1283 void MainWindow::apply_transition(int transition_number)
1284 {
1285         global_mixer->transition_clicked(transition_number);
1286 }
1287
1288 void MainWindow::prev_audio_view()
1289 {
1290         post_to_main_thread([this]{
1291                 prev_page();
1292         });
1293 }
1294
1295 void MainWindow::next_audio_view()
1296 {
1297         post_to_main_thread([this]{
1298                 next_page();
1299         });
1300 }
1301
1302 void MainWindow::begin_new_segment()
1303 {
1304         global_mixer->schedule_cut();
1305 }
1306
1307 void MainWindow::exit()
1308 {
1309         post_to_main_thread([this]{
1310                 close();
1311         });
1312 }
1313
1314 void MainWindow::highlight_locut(bool highlight)
1315 {
1316         post_to_main_thread([this, highlight]{
1317                 highlight_control(ui->locut_cutoff_knob, highlight);
1318                 highlight_control(ui->locut_cutoff_knob_2, highlight);
1319         });
1320 }
1321
1322 void MainWindow::highlight_limiter_threshold(bool highlight)
1323 {
1324         post_to_main_thread([this, highlight]{
1325                 highlight_control(ui->limiter_threshold_knob, highlight);
1326                 highlight_control(ui->limiter_threshold_knob_2, highlight);
1327         });
1328 }
1329
1330 void MainWindow::highlight_makeup_gain(bool highlight)
1331 {
1332         post_to_main_thread([this, highlight]{
1333                 highlight_control(ui->makeup_gain_knob, highlight);
1334                 highlight_control(ui->makeup_gain_knob_2, highlight);
1335         });
1336 }
1337
1338 void MainWindow::highlight_stereo_width(unsigned bus_idx, bool highlight)
1339 {
1340         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::stereo_width_knob, highlight);
1341 }
1342
1343 void MainWindow::highlight_treble(unsigned bus_idx, bool highlight)
1344 {
1345         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, highlight);
1346 }
1347
1348 void MainWindow::highlight_mid(unsigned bus_idx, bool highlight)
1349 {
1350         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, highlight);
1351 }
1352
1353 void MainWindow::highlight_bass(unsigned bus_idx, bool highlight)
1354 {
1355         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, highlight);
1356 }
1357
1358 void MainWindow::highlight_gain(unsigned bus_idx, bool highlight)
1359 {
1360         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, highlight);
1361 }
1362
1363 void MainWindow::highlight_compressor_threshold(unsigned bus_idx, bool highlight)
1364 {
1365         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, highlight);
1366 }
1367
1368 void MainWindow::highlight_fader(unsigned bus_idx, bool highlight)
1369 {
1370         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::fader, highlight);
1371 }
1372
1373 void MainWindow::highlight_mute(unsigned bus_idx, bool highlight)
1374 {
1375         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button, highlight, /*is_mute_btton=*/true);
1376 }
1377
1378 void MainWindow::highlight_toggle_locut(unsigned bus_idx, bool highlight)
1379 {
1380         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled, highlight);
1381 }
1382
1383 void MainWindow::highlight_toggle_auto_gain_staging(unsigned bus_idx, bool highlight)
1384 {
1385         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox, highlight);
1386 }
1387
1388 void MainWindow::highlight_toggle_compressor(unsigned bus_idx, bool highlight)
1389 {
1390         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled, highlight);
1391 }
1392
1393 void MainWindow::highlight_toggle_limiter(bool highlight)
1394 {
1395         post_to_main_thread([this, highlight]{
1396                 highlight_control(ui->limiter_enabled, highlight);
1397                 highlight_control(ui->limiter_enabled_2, highlight);
1398         });
1399 }
1400
1401 void MainWindow::highlight_toggle_auto_makeup_gain(bool highlight)
1402 {
1403         post_to_main_thread([this, highlight]{
1404                 highlight_control(ui->makeup_gain_auto_checkbox, highlight);
1405                 highlight_control(ui->makeup_gain_auto_checkbox_2, highlight);
1406         });
1407 }
1408
1409 template<class T>
1410 void MainWindow::set_relative_value(T *control, float value)
1411 {
1412         post_to_main_thread([control, value]{
1413                 control->setValue(lrintf(control->minimum() + value * (control->maximum() - control->minimum())));
1414         });
1415 }
1416
1417 template<class T>
1418 void MainWindow::set_relative_value_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), float value)
1419 {
1420         if (global_audio_mixer != nullptr &&
1421             global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1422             bus_idx < audio_expanded_views.size()) {
1423                 set_relative_value(audio_expanded_views[bus_idx]->*control, value);
1424         }
1425 }
1426
1427 template<class T>
1428 void MainWindow::click_button_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control))
1429 {
1430         post_to_main_thread([this, bus_idx, control]{
1431                 if (global_audio_mixer != nullptr &&
1432                     global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1433                     bus_idx < audio_expanded_views.size()) {
1434                         (audio_expanded_views[bus_idx]->*control)->click();
1435                 }
1436         });
1437 }
1438
1439 template<class T>
1440 void MainWindow::highlight_control(T *control, bool highlight)
1441 {
1442         if (control == nullptr) {
1443                 return;
1444         }
1445         if (global_audio_mixer == nullptr ||
1446             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1447                 highlight = false;
1448         }
1449         if (highlight) {
1450                 control->setStyleSheet("background: rgb(0,255,0,80)");
1451         } else {
1452                 control->setStyleSheet("");
1453         }
1454 }
1455
1456 template<class T>
1457 void MainWindow::highlight_mute_control(T *control, bool highlight)
1458 {
1459         if (control == nullptr) {
1460                 return;
1461         }
1462         if (global_audio_mixer == nullptr ||
1463             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1464                 highlight = false;
1465         }
1466         if (highlight) {
1467                 control->setStyleSheet("QPushButton { background: rgb(0,255,0,80); } QPushButton:checked { background: rgba(255,80,0,140); }");
1468         } else {
1469                 control->setStyleSheet("QPushButton:checked { background: rgba(255,0,0,80); }");
1470         }
1471 }
1472
1473 template<class T>
1474 void MainWindow::highlight_control_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), bool highlight, bool is_mute_button)
1475 {
1476         post_to_main_thread([this, bus_idx, control, highlight, is_mute_button]{
1477                 if (bus_idx < audio_expanded_views.size()) {
1478                         if (is_mute_button) {
1479                                 highlight_mute_control(audio_expanded_views[bus_idx]->*control, highlight);
1480                         } else {
1481                                 highlight_control(audio_expanded_views[bus_idx]->*control, highlight);
1482                         }
1483                 }
1484         });
1485 }
1486
1487 void MainWindow::set_transition_names(vector<string> transition_names)
1488 {
1489         if (transition_names.size() < 1 || transition_names[0].empty()) {
1490                 transition_btn1->setText(QString(""));
1491         } else {
1492                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
1493                 ui->transition_btn1->setShortcut(QKeySequence("J"));
1494         }
1495         if (transition_names.size() < 2 || transition_names[1].empty()) {
1496                 transition_btn2->setText(QString(""));
1497         } else {
1498                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
1499                 ui->transition_btn2->setShortcut(QKeySequence("K"));
1500         }
1501         if (transition_names.size() < 3 || transition_names[2].empty()) {
1502                 transition_btn3->setText(QString(""));
1503         } else {
1504                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
1505                 ui->transition_btn3->setShortcut(QKeySequence("L"));
1506         }
1507 }
1508
1509 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
1510 {
1511         if (output == Mixer::OUTPUT_LIVE) {
1512                 ui->label_live->setText(name.c_str());
1513         } else if (output == Mixer::OUTPUT_PREVIEW) {
1514                 ui->label_preview->setText(name.c_str());
1515         } else if (output >= Mixer::OUTPUT_INPUT0) {
1516                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1517                 previews[channel]->label->setText(name.c_str());
1518         }
1519
1520         analyzer->update_channel_name(output, name);
1521 }
1522
1523 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
1524 {
1525         if (output >= Mixer::OUTPUT_INPUT0) {
1526                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1527                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
1528         }
1529 }
1530
1531 void MainWindow::transition_clicked(int transition_number)
1532 {
1533         global_mixer->transition_clicked(transition_number);
1534 }
1535
1536 void MainWindow::channel_clicked(int channel_number)
1537 {
1538         if (current_wb_pick_display == channel_number) {
1539                 // The picking was already done from eventFilter(), since we don't get
1540                 // the mouse pointer here.
1541         } else {
1542                 global_mixer->channel_clicked(channel_number);
1543         }
1544 }
1545
1546 void MainWindow::quick_cut_activated(int channel_number)
1547 {
1548         if (!global_flags.enable_quick_cut_keys) {
1549                 return;
1550         }
1551         global_mixer->channel_clicked(channel_number);
1552         global_mixer->transition_clicked(0);
1553 }
1554
1555 void MainWindow::wb_button_clicked(int channel_number)
1556 {
1557         current_wb_pick_display = channel_number;
1558         QApplication::setOverrideCursor(Qt::CrossCursor);
1559 }
1560
1561 void MainWindow::audio_view_changed(int audio_view)
1562 {
1563         if (audio_view == current_audio_view) {
1564                 return;
1565         }
1566
1567         if (audio_view == 0) {
1568                 // Compact audio view. (1, full audio view, has no video previews.)
1569                 for (unsigned i = 0; i < previews.size(); ++i) {
1570                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1571                         ui->preview_displays->insertWidget(i, display, 1);
1572                 }
1573         } else if (audio_view == 2) {
1574                 // Video grid display.
1575                 for (unsigned i = 0; i < previews.size(); ++i) {
1576                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1577                         display->setParent(ui->preview_displays_grid);
1578                         display->show();
1579                 }
1580         }
1581
1582         current_audio_view = audio_view;
1583
1584         // Ask for a relayout, but only after the event loop is done doing relayout
1585         // on everything else.
1586         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
1587 }
1588
1589 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
1590 {
1591         if (current_wb_pick_display != -1 &&
1592             event->type() == QEvent::MouseButtonRelease &&
1593             watched->isWidgetType()) {
1594                 QApplication::restoreOverrideCursor();
1595                 if (watched == previews[current_wb_pick_display]->display) {
1596                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
1597                         previews[current_wb_pick_display]->display->grab_white_balance(
1598                                 current_wb_pick_display,
1599                                 mouse_event->x(), mouse_event->y());
1600                 } else {
1601                         // The user clicked on something else, give up.
1602                         // (The click goes through, which might not be ideal, but, yes.)
1603                         current_wb_pick_display = -1;
1604                 }
1605         }
1606         return false;
1607 }
1608
1609 void MainWindow::closeEvent(QCloseEvent *event)
1610 {
1611         if (global_mixer->get_num_connected_clients() > 0) {
1612                 QMessageBox::StandardButton reply =
1613                         QMessageBox::question(this, "Nageru", "There are clients connected. Do you really want to quit?",
1614                                 QMessageBox::Yes | QMessageBox::No);
1615                 if (reply != QMessageBox::Yes) {
1616                         event->ignore();
1617                         return;
1618                 }
1619         }
1620
1621         analyzer->hide();
1622         global_mixer->quit();
1623         mixer_shutting_down();
1624         event->accept();
1625 }
1626
1627 void MainWindow::audio_state_changed()
1628 {
1629         post_to_main_thread([this]{
1630                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
1631                         return;
1632                 }
1633                 InputMapping mapping = global_audio_mixer->get_input_mapping();
1634                 for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
1635                         string label = get_bus_desc_label(mapping.buses[bus_index]);
1636                         audio_miniviews[bus_index]->bus_desc_label->setFullText(
1637                                 QString::fromStdString(label));
1638                         audio_expanded_views[bus_index]->bus_desc_label->setFullText(
1639                                 QString::fromStdString(label));
1640                 }
1641         });
1642 }