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 <QMainWindow>
  27 #include <QMenuBar>
  28 #include <QMessageBox>
  29 #include <QMouseEvent>
  30 #include <QObject>
  31 #include <QPaintDevice>
  32 #include <QPushButton>
  33 #include <QRect>
  34 #include <QRgb>
  35 #include <QShortcut>
  36 #include <QStackedWidget>
  37 #include <QToolButton>
  38 #include <QUrl>
  39 #include <QWidget>
  40 #include <algorithm>
  41 #include <chrono>
  42 #include <cmath>
  43 #include <functional>
  44 #include <limits>
  45 #include <memory>
  46 #include <string>
  47 #include <sys/types.h>
  48 #include <vector>
  49
  50 #include "audio_mixer.h"
  51 #include "midi_mapper.h"
  52 #include "shared/aboutdialog.h"
  53 #include "alsa_pool.h"
  54 #include "analyzer.h"
  55 #include "clickable_label.h"
  56 #include "context_menus.h"
  57 #include "correlation_meter.h"
  58 #include "shared/disk_space_estimator.h"
  59 #include "ellipsis_label.h"
  60 #include "flags.h"
  61 #include "glwidget.h"
  62 #include "input_mapping.h"
  63 #include "input_mapping_dialog.h"
  64 #include "lrameter.h"
  65 #include "nageru_midi_mapping.pb.h"
  66 #include "midi_mapping_dialog.h"
  67 #include "mixer.h"
  68 #include "nonlinear_fader.h"
  69 #include "shared/post_to_main_thread.h"
  70 #include "theme.h"
  71 #include "ui_audio_expanded_view.h"
  72 #include "ui_audio_miniview.h"
  73 #include "ui_display.h"
  74 #include "ui_mainwindow.h"
  75 #include "vumeter.h"
  76
  77 using namespace std;
  78 using namespace std::chrono;
  79 using namespace std::placeholders;
  80
  81 Q_DECLARE_METATYPE(std::string);
  82 Q_DECLARE_METATYPE(std::vector<std::string>);
  83
  84 MainWindow *global_mainwindow = nullptr;
  85
  86 // -0.1 dBFS is EBU peak limit. We use it consistently, even for the bus meters
  87 // (which don't calculate interpolate peak, and in general don't follow EBU recommendations).
  88 constexpr float peak_limit_dbfs = -0.1f;
  89
  90 namespace {
  91
  92 void schedule_cut_signal(int ignored)
  93 {
  94         global_mixer->schedule_cut();
  95 }
  96
  97 void quit_signal(int ignored)
  98 {
  99         global_mainwindow->close();
 100 }
 101
 102 void slave_knob(QDial *master, QDial *slave)
 103 {
 104         QWidget::connect(master, &QDial::valueChanged, [slave](int value){
 105                 slave->blockSignals(true);
 106                 slave->setValue(value);
 107                 slave->blockSignals(false);
 108         });
 109         QWidget::connect(slave, &QDial::valueChanged, [master](int value){
 110                 master->setValue(value);
 111         });
 112 }
 113
 114 void slave_checkbox(QCheckBox *master, QCheckBox *slave)
 115 {
 116         QWidget::connect(master, &QCheckBox::stateChanged, [slave](int state){
 117                 slave->blockSignals(true);
 118                 slave->setCheckState(Qt::CheckState(state));
 119                 slave->blockSignals(false);
 120         });
 121         QWidget::connect(slave, &QCheckBox::stateChanged, [master](int state){
 122                 master->setCheckState(Qt::CheckState(state));
 123         });
 124 }
 125
 126 void slave_fader(NonLinearFader *master, NonLinearFader *slave)
 127 {
 128         QWidget::connect(master, &NonLinearFader::dbValueChanged, [slave](double value) {
 129                 slave->blockSignals(true);
 130                 slave->setDbValue(value);
 131                 slave->blockSignals(false);
 132         });
 133         QWidget::connect(slave, &NonLinearFader::dbValueChanged, [master](double value){
 134                 master->setDbValue(value);
 135         });
 136 }
 137
 138 constexpr unsigned DB_WITH_SIGN = 0x1;
 139 constexpr unsigned DB_BARE = 0x2;
 140
 141 string format_db(double db, unsigned flags)
 142 {
 143         string text;
 144         if (flags & DB_WITH_SIGN) {
 145                 if (isfinite(db)) {
 146                         char buf[256];
 147                         snprintf(buf, sizeof(buf), "%+.1f", db);
 148                         text = buf;
 149                 } else if (db < 0.0) {
 150                         text = "-∞";
 151                 } else {
 152                         // Should never happen, really.
 153                         text = "+∞";
 154                 }
 155         } else {
 156                 if (isfinite(db)) {
 157                         char buf[256];
 158                         snprintf(buf, sizeof(buf), "%.1f", db);
 159                         text = buf;
 160                 } else if (db < 0.0) {
 161                         text = "-∞";
 162                 } else {
 163                         // Should never happen, really.
 164                         text = "∞";
 165                 }
 166         }
 167         if (!(flags & DB_BARE)) {
 168                 text += " dB";
 169         }
 170         return text;
 171 }
 172
 173 void set_peak_label(QLabel *peak_label, float peak_db)
 174 {
 175         peak_label->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 176
 177         if (peak_db > peak_limit_dbfs) {
 178                 peak_label->setStyleSheet("QLabel { background-color: red; color: white; }");
 179         } else {
 180                 peak_label->setStyleSheet("");
 181         }
 182 }
 183
 184 string get_bus_desc_label(const InputMapping::Bus &bus)
 185 {
 186         string suffix;
 187         if (bus.device.type == InputSourceType::ALSA_INPUT) {
 188                 ALSAPool::Device::State state = global_audio_mixer->get_alsa_card_state(bus.device.index);
 189                 if (state == ALSAPool::Device::State::STARTING) {
 190                         suffix = " (busy)";
 191                 } else if (state == ALSAPool::Device::State::DEAD) {
 192                         suffix = " (dead)";
 193                 }
 194         }
 195
 196         return bus.name + suffix;
 197 }
 198
 199 }  // namespace
 200
 201 MainWindow::MainWindow()
 202         : ui(new Ui::MainWindow), midi_mapper(this)
 203 {
 204         global_mainwindow = this;
 205         ui->setupUi(this);
 206
 207         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2, _3));
 208         disk_free_label = new QLabel(this);
 209         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 210         ui->menuBar->setCornerWidget(disk_free_label);
 211
 212         QActionGroup *audio_mapping_group = new QActionGroup(this);
 213         ui->simple_audio_mode->setActionGroup(audio_mapping_group);
 214         ui->multichannel_audio_mode->setActionGroup(audio_mapping_group);
 215
 216         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
 217         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
 218
 219         // The menus.
 220         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
 221         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
 222         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
 223         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
 224         connect(ui->open_analyzer_action, &QAction::triggered, this, &MainWindow::open_analyzer_triggered);
 225         connect(ui->simple_audio_mode, &QAction::triggered, this, &MainWindow::simple_audio_mode_triggered);
 226         connect(ui->multichannel_audio_mode, &QAction::triggered, this, &MainWindow::multichannel_audio_mode_triggered);
 227         connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
 228         connect(ui->midi_mapping_action, &QAction::triggered, this, &MainWindow::midi_mapping_triggered);
 229         connect(ui->timecode_stream_action, &QAction::triggered, this, &MainWindow::timecode_stream_triggered);
 230         connect(ui->timecode_stdout_action, &QAction::triggered, this, &MainWindow::timecode_stdout_triggered);
 231
 232         ui->timecode_stream_action->setChecked(global_flags.display_timecode_in_stream);
 233         ui->timecode_stdout_action->setChecked(global_flags.display_timecode_on_stdout);
 234
 235         if (global_flags.x264_video_to_http && isinf(global_flags.x264_crf)) {
 236                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
 237         } else {
 238                 ui->x264_bitrate_action->setEnabled(false);
 239         }
 240
 241         connect(ui->video_menu, &QMenu::aboutToShow, [this]{
 242                 fill_hdmi_sdi_output_device_menu(ui->hdmi_sdi_output_device_menu);
 243                 fill_hdmi_sdi_output_resolution_menu(ui->hdmi_sdi_output_resolution_menu);
 244         });
 245
 246         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 247         // TODO: Make them dynamic.
 248         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
 249         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
 250         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 251
 252         // Aiee...
 253         transition_btn1 = ui->transition_btn1;
 254         transition_btn2 = ui->transition_btn2;
 255         transition_btn3 = ui->transition_btn3;
 256         qRegisterMetaType<string>("std::string");
 257         qRegisterMetaType<vector<string>>("std::vector<std::string>");
 258         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 259         qRegisterMetaType<Mixer::Output>("Mixer::Output");
 260
 261         connect(ui->me_live, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 262         connect(ui->me_preview, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 263
 264         // Hook up the prev/next buttons on the audio views.
 265         connect(ui->compact_prev_page, &QAbstractButton::clicked, this, &MainWindow::prev_page);
 266         connect(ui->compact_next_page, &QAbstractButton::clicked, this, &MainWindow::next_page);
 267         connect(ui->full_prev_page, &QAbstractButton::clicked, this, &MainWindow::prev_page);
 268         connect(ui->full_next_page, &QAbstractButton::clicked, this, &MainWindow::next_page);
 269         connect(ui->video_grid_prev_page, &QAbstractButton::clicked, this, &MainWindow::prev_page);
 270         connect(ui->video_grid_next_page, &QAbstractButton::clicked, this, &MainWindow::next_page);
 271
 272         // And bind the same to PgUp/PgDown.
 273         connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, this, &MainWindow::next_page);
 274         connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, this, &MainWindow::prev_page);
 275
 276         // When the audio view changes, move the previews.
 277         connect(ui->audio_views, &QStackedWidget::currentChanged, bind(&MainWindow::audio_view_changed, this, _1));
 278
 279         if (global_flags.enable_quick_cut_keys) {
 280                 ui->quick_cut_enable_action->setChecked(true);
 281         }
 282         connect(ui->quick_cut_enable_action, &QAction::changed, [this](){
 283                 global_flags.enable_quick_cut_keys = ui->quick_cut_enable_action->isChecked();
 284         });
 285
 286 #if HAVE_SRT
 287         if (global_flags.srt_port >= 0) {
 288                 char title[256];
 289                 snprintf(title, sizeof(title), "Accept new SRT connections on port %d", global_flags.srt_port);
 290                 ui->srt_enable_action->setChecked(true);
 291                 ui->srt_enable_action->setText(title);
 292                 connect(ui->srt_enable_action, &QAction::changed, [this](){
 293                         global_flags.enable_srt = ui->srt_enable_action->isChecked();
 294                 });
 295         } else {
 296                 ui->srt_enable_action->setChecked(false);
 297                 ui->srt_enable_action->setEnabled(false);
 298                 ui->srt_enable_action->setText("Accept new SRT connections");
 299         }
 300 #else
 301         ui->srt_enable_action->setChecked(false);
 302         ui->srt_enable_action->setEnabled(false);
 303         ui->srt_enable_action->setText("Accept new SRT connections");
 304 #endif
 305
 306         last_audio_level_callback = steady_clock::now() - seconds(1);
 307
 308         if (!global_flags.midi_mapping_filename.empty()) {
 309                 MIDIMappingProto midi_mapping;
 310                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 311                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 312                                 global_flags.midi_mapping_filename.c_str());
 313                         ::abort();
 314                 }
 315                 midi_mapper.set_midi_mapping(midi_mapping);
 316         }
 317         midi_mapper.refresh_highlights();
 318         midi_mapper.refresh_lights();
 319         if (global_flags.fullscreen) {
 320                 QMainWindow::showFullScreen();
 321         }
 322 }
 323
 324 void MainWindow::prev_page()
 325 {
 326         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 327                 ui->audio_views->setCurrentIndex((ui->audio_views->currentIndex() + 2) % 3);
 328         } else {
 329                 ui->audio_views->setCurrentIndex(2 - ui->audio_views->currentIndex());  // Switch between 0 and 2.
 330         }
 331 }
 332
 333 void MainWindow::next_page()
 334 {
 335         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 336                 ui->audio_views->setCurrentIndex((ui->audio_views->currentIndex() + 1) % 3);
 337         } else {
 338                 ui->audio_views->setCurrentIndex(2 - ui->audio_views->currentIndex());  // Switch between 0 and 2.
 339         }
 340 }
 341
 342 void MainWindow::resizeEvent(QResizeEvent* event)
 343 {
 344         QMainWindow::resizeEvent(event);
 345
 346         // Ask for a relayout, but only after the event loop is done doing relayout
 347         // on everything else.
 348         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 349 }
 350
 351 void MainWindow::mixer_created(Mixer *mixer)
 352 {
 353         // Make the previews.
 354         unsigned num_previews = mixer->get_num_channels();
 355
 356         const char qwerty[] = "QWERTYUIOP";
 357         for (unsigned i = 0; i < num_previews; ++i) {
 358                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 359
 360                 QWidget *preview = new QWidget(this);  // Will be connected to a layout immediately after the loop.
 361                 Ui::Display *ui_display = new Ui::Display;
 362                 ui_display->setupUi(preview);
 363                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 364                 ui_display->display->set_output(output);
 365                 previews.push_back(ui_display);
 366
 367                 // Hook up the click.
 368                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 369
 370                 // Let the theme update the text whenever the resolution or color changed.
 371                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 372                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 373
 374                 // Hook up the keyboard key.
 375                 QShortcut *shortcut = nullptr;
 376                 if (i < 9) {
 377                         shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 378                 } else if (i == 9) {
 379                         shortcut = new QShortcut(QKeySequence(Qt::Key_0), this);
 380                 }
 381                 if (shortcut != nullptr) {
 382                         connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 383                 }
 384
 385                 // Hook up the quick-cut key.
 386                 if (i < strlen(qwerty)) {
 387                         QShortcut *shortcut = new QShortcut(QKeySequence(qwerty[i]), this);
 388                         connect(shortcut, &QShortcut::activated, bind(&MainWindow::quick_cut_activated, this, i));
 389                 }
 390
 391                 // Hook up the white balance button (irrelevant if invisible).
 392                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 393                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 394         }
 395
 396         // Connect the previews to the correct layout.
 397         audio_view_changed(ui->audio_views->currentIndex());
 398
 399         global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
 400
 401         slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
 402         slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
 403         slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
 404         slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
 405         slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
 406
 407         reset_audio_mapping_ui();
 408
 409         // TODO: Fetch all of the values these for completeness,
 410         // not just the enable knobs implied by flags.
 411         ui->limiter_enabled->setChecked(global_audio_mixer->get_limiter_enabled());
 412         ui->makeup_gain_auto_checkbox->setChecked(global_audio_mixer->get_final_makeup_gain_auto());
 413
 414         // Controls used only for simple audio fetch their state from the first bus.
 415         constexpr unsigned simple_bus_index = 0;
 416         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 417                 ui->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(simple_bus_index));
 418                 ui->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(simple_bus_index));
 419                 ui->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(simple_bus_index));
 420                 ui->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(simple_bus_index));
 421                 ui->compressor_threshold_db_display->setText(
 422                         QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(simple_bus_index), DB_WITH_SIGN)));
 423         }
 424         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 425                 global_audio_mixer->set_locut_enabled(simple_bus_index, state == Qt::Checked);
 426                 midi_mapper.refresh_lights();
 427         });
 428         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged,
 429                 bind(&MainWindow::gain_staging_knob_changed, this, simple_bus_index, _1));
 430         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 431                 global_audio_mixer->set_gain_staging_auto(simple_bus_index, state == Qt::Checked);
 432                 midi_mapper.refresh_lights();
 433         });
 434         connect(ui->compressor_threshold_knob, &QDial::valueChanged,
 435                 bind(&MainWindow::compressor_threshold_knob_changed, this, simple_bus_index, _1));
 436         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 437                 global_audio_mixer->set_compressor_enabled(simple_bus_index, state == Qt::Checked);
 438                 midi_mapper.refresh_lights();
 439         });
 440
 441         // Global mastering controls.
 442         QString limiter_threshold_label(
 443                 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
 444         ui->limiter_threshold_db_display->setText(limiter_threshold_label);
 445         ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
 446
 447         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 448         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 449
 450         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 451         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 452                 global_audio_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 453                 midi_mapper.refresh_lights();
 454         });
 455
 456         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 457         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 458                 global_audio_mixer->set_limiter_enabled(state == Qt::Checked);
 459                 midi_mapper.refresh_lights();
 460         });
 461         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 462         // Even though we have a reset button right next to it, the fact that
 463         // the expanded audio view labels are clickable makes it natural to
 464         // click this one as well.
 465         connect(ui->peak_display, &ClickableLabel::clicked, this, &MainWindow::reset_meters_button_clicked);
 466         mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 467
 468         midi_mapper.refresh_highlights();
 469         midi_mapper.refresh_lights();
 470         midi_mapper.start_thread();
 471
 472         analyzer.reset(new Analyzer);
 473
 474         global_mixer->set_theme_menu_callback(bind(&MainWindow::setup_theme_menu, this));
 475         setup_theme_menu();
 476
 477         struct sigaction act;
 478         memset(&act, 0, sizeof(act));
 479         act.sa_handler = schedule_cut_signal;
 480         act.sa_flags = SA_RESTART;
 481         sigaction(SIGHUP, &act, nullptr);
 482
 483         // Mostly for debugging. Don't override SIGINT, that's so evil if
 484         // shutdown isn't instant.
 485         memset(&act, 0, sizeof(act));
 486         act.sa_handler = quit_signal;
 487         act.sa_flags = SA_RESTART;
 488         sigaction(SIGUSR1, &act, nullptr);
 489 }
 490
 491 void MainWindow::reset_audio_mapping_ui()
 492 {
 493         bool simple = (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE);
 494
 495         ui->simple_audio_mode->setChecked(simple);
 496         ui->multichannel_audio_mode->setChecked(!simple);
 497         ui->input_mapping_action->setEnabled(!simple);
 498         ui->midi_mapping_action->setEnabled(!simple);
 499
 500         ui->locut_enabled->setVisible(simple);
 501         ui->gainstaging_label->setVisible(simple);
 502         ui->gainstaging_knob->setVisible(simple);
 503         ui->gainstaging_db_display->setVisible(simple);
 504         ui->gainstaging_auto_checkbox->setVisible(simple);
 505         ui->compressor_threshold_label->setVisible(simple);
 506         ui->compressor_threshold_knob->setVisible(simple);
 507         ui->compressor_threshold_db_display->setVisible(simple);
 508         ui->compressor_enabled->setVisible(simple);
 509
 510         setup_audio_miniview();
 511         setup_audio_expanded_view();
 512
 513         if (simple) {
 514                 ui->compact_label->setText("Compact audio view (1/2)  ");
 515                 ui->video_grid_label->setText("Video grid display (2/2)  ");
 516                 if (ui->audio_views->currentIndex() == 1) {
 517                         // Full audio view is not available in simple mode.
 518                         ui->audio_views->setCurrentIndex(0);
 519                 }
 520         } else {
 521                 ui->compact_label->setText("Compact audio view (1/3)  ");
 522                 ui->full_label->setText("Full audio view (2/3)  ");
 523                 ui->video_grid_label->setText("Video grid display (3/3)  ");
 524         }
 525
 526         midi_mapper.refresh_highlights();
 527         midi_mapper.refresh_lights();
 528 }
 529
 530 void MainWindow::setup_audio_miniview()
 531 {
 532         // Remove any existing channels.
 533         for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
 534                 delete item->widget();
 535                 delete item;
 536         }
 537         audio_miniviews.clear();
 538
 539         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 540                 return;
 541         }
 542
 543         // Set up brand new ones from the input mapping.
 544         InputMapping mapping = global_audio_mixer->get_input_mapping();
 545         audio_miniviews.resize(mapping.buses.size());
 546         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 547                 QWidget *channel = new QWidget(this);
 548                 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
 549                 ui_audio_miniview->setupUi(channel);
 550                 ui_audio_miniview->bus_desc_label->setFullText(
 551                         QString::fromStdString(get_bus_desc_label(mapping.buses[bus_index])));
 552                 audio_miniviews[bus_index] = ui_audio_miniview;
 553
 554                 // Set up the peak meter.
 555                 VUMeter *peak_meter = ui_audio_miniview->peak_meter;
 556                 peak_meter->set_min_level(-30.0f);
 557                 peak_meter->set_max_level(0.0f);
 558                 peak_meter->set_ref_level(0.0f);
 559
 560                 ui_audio_miniview->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 561
 562                 ui->faders->addWidget(channel);
 563
 564                 connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
 565                         bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
 566                 connect(ui_audio_miniview->peak_display_label, &ClickableLabel::clicked,
 567                         [bus_index]() {
 568                                 global_audio_mixer->reset_peak(bus_index);
 569                         });
 570         }
 571 }
 572
 573 void MainWindow::setup_audio_expanded_view()
 574 {
 575         // Remove any existing channels.
 576         for (QLayoutItem *item; (item = ui->buses->takeAt(0)) != nullptr; ) {
 577                 delete item->widget();
 578                 delete item;
 579         }
 580         audio_expanded_views.clear();
 581
 582         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 583                 return;
 584         }
 585
 586         // Set up brand new ones from the input mapping.
 587         InputMapping mapping = global_audio_mixer->get_input_mapping();
 588         audio_expanded_views.resize(mapping.buses.size());
 589         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 590                 QWidget *channel = new QWidget(this);
 591                 Ui::AudioExpandedView *ui_audio_expanded_view = new Ui::AudioExpandedView;
 592                 ui_audio_expanded_view->setupUi(channel);
 593                 ui_audio_expanded_view->bus_desc_label->setFullText(
 594                         QString::fromStdString(get_bus_desc_label(mapping.buses[bus_index])));
 595                 audio_expanded_views[bus_index] = ui_audio_expanded_view;
 596                 update_stereo_knob_and_label(bus_index, lrintf(100.0f * global_audio_mixer->get_stereo_width(bus_index)));
 597                 update_eq_label(bus_index, EQ_BAND_TREBLE, global_audio_mixer->get_eq(bus_index, EQ_BAND_TREBLE));
 598                 update_eq_label(bus_index, EQ_BAND_MID, global_audio_mixer->get_eq(bus_index, EQ_BAND_MID));
 599                 update_eq_label(bus_index, EQ_BAND_BASS, global_audio_mixer->get_eq(bus_index, EQ_BAND_BASS));
 600                 ui_audio_expanded_view->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 601                 ui_audio_expanded_view->mute_button->setChecked(global_audio_mixer->get_mute(bus_index));
 602                 connect(ui_audio_expanded_view->mute_button, &QPushButton::toggled,
 603                         bind(&MainWindow::mute_button_toggled, this, bus_index, _1));
 604                 ui->buses->addWidget(channel);
 605
 606                 ui_audio_expanded_view->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(bus_index));
 607                 connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 608                         global_audio_mixer->set_locut_enabled(bus_index, state == Qt::Checked);
 609                         midi_mapper.refresh_lights();
 610                 });
 611
 612                 connect(ui_audio_expanded_view->stereo_width_knob, &QDial::valueChanged,
 613                         bind(&MainWindow::stereo_width_knob_changed, this, bus_index, _1));
 614
 615                 connect(ui_audio_expanded_view->treble_knob, &QDial::valueChanged,
 616                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_TREBLE, _1));
 617                 connect(ui_audio_expanded_view->mid_knob, &QDial::valueChanged,
 618                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_MID, _1));
 619                 connect(ui_audio_expanded_view->bass_knob, &QDial::valueChanged,
 620                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_BASS, _1));
 621
 622                 ui_audio_expanded_view->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(bus_index));
 623                 ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(bus_index));
 624                 ui_audio_expanded_view->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(bus_index));
 625
 626                 connect(ui_audio_expanded_view->gainstaging_knob, &QAbstractSlider::valueChanged, bind(&MainWindow::gain_staging_knob_changed, this, bus_index, _1));
 627                 connect(ui_audio_expanded_view->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, bus_index](int state){
 628                         global_audio_mixer->set_gain_staging_auto(bus_index, state == Qt::Checked);
 629                         midi_mapper.refresh_lights();
 630                 });
 631
 632                 connect(ui_audio_expanded_view->compressor_threshold_knob, &QDial::valueChanged, bind(&MainWindow::compressor_threshold_knob_changed, this, bus_index, _1));
 633                 connect(ui_audio_expanded_view->compressor_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 634                         global_audio_mixer->set_compressor_enabled(bus_index, state == Qt::Checked);
 635                         midi_mapper.refresh_lights();
 636                 });
 637
 638                 slave_fader(audio_miniviews[bus_index]->fader, ui_audio_expanded_view->fader);
 639
 640                 // Set up the peak meter.
 641                 VUMeter *peak_meter = ui_audio_expanded_view->peak_meter;
 642                 peak_meter->set_min_level(-30.0f);
 643                 peak_meter->set_max_level(0.0f);
 644                 peak_meter->set_ref_level(0.0f);
 645
 646                 connect(ui_audio_expanded_view->peak_display_label, &ClickableLabel::clicked,
 647                         [this, bus_index]() {
 648                                 global_audio_mixer->reset_peak(bus_index);
 649                                 midi_mapper.refresh_lights();
 650                         });
 651         }
 652
 653         update_cutoff_labels(global_audio_mixer->get_locut_cutoff());
 654 }
 655
 656 void MainWindow::mixer_shutting_down()
 657 {
 658         ui->me_live->shutdown();
 659         ui->me_preview->shutdown();
 660
 661         for (Ui::Display *display : previews) {
 662                 display->display->shutdown();
 663         }
 664
 665         analyzer->mixer_shutting_down();
 666 }
 667
 668 void MainWindow::cut_triggered()
 669 {
 670         global_mixer->schedule_cut();
 671 }
 672
 673 void MainWindow::x264_bitrate_triggered()
 674 {
 675         bool ok;
 676         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);
 677         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 678                 global_flags.x264_bitrate = new_bitrate;
 679                 global_mixer->change_x264_bitrate(new_bitrate);
 680         }
 681 }
 682
 683 void MainWindow::exit_triggered()
 684 {
 685         close();
 686 }
 687
 688 void MainWindow::manual_triggered()
 689 {
 690         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 691                 QMessageBox msgbox;
 692                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 693                 msgbox.exec();
 694         }
 695 }
 696
 697 void MainWindow::about_triggered()
 698 {
 699         AboutDialog("Nageru", "Realtime video mixer").exec();
 700 }
 701
 702 void MainWindow::open_analyzer_triggered()
 703 {
 704         analyzer->show();
 705 }
 706
 707 void MainWindow::simple_audio_mode_triggered()
 708 {
 709         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 710                 return;
 711         }
 712         unsigned card_index = global_audio_mixer->get_simple_input();
 713         if (card_index == numeric_limits<unsigned>::max()) {
 714                 QMessageBox::StandardButton reply =
 715                         QMessageBox::question(this,
 716                                 "Mapping too complex",
 717                                 "The current audio mapping is too complicated to be representable in simple mode, "
 718                                         "and will be discarded if you proceed. Really go to simple audio mode?",
 719                                 QMessageBox::Yes | QMessageBox::No);
 720                 if (reply == QMessageBox::No) {
 721                         ui->simple_audio_mode->setChecked(false);
 722                         ui->multichannel_audio_mode->setChecked(true);
 723                         return;
 724                 }
 725                 card_index = 0;
 726         }
 727         global_audio_mixer->set_simple_input(/*card_index=*/card_index);
 728         reset_audio_mapping_ui();
 729 }
 730
 731 void MainWindow::multichannel_audio_mode_triggered()
 732 {
 733         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 734                 return;
 735         }
 736
 737         // Take the generated input mapping from the simple input,
 738         // and set it as a normal multichannel mapping, which causes
 739         // the mode to go to multichannel.
 740         global_audio_mixer->set_input_mapping(global_audio_mixer->get_input_mapping());
 741         reset_audio_mapping_ui();
 742 }
 743
 744 void MainWindow::input_mapping_triggered()
 745 {
 746         if (InputMappingDialog().exec() == QDialog::Accepted) {
 747                 setup_audio_miniview();
 748                 setup_audio_expanded_view();
 749         }
 750         midi_mapper.refresh_highlights();
 751         midi_mapper.refresh_lights();
 752 }
 753
 754 void MainWindow::midi_mapping_triggered()
 755 {
 756         MIDIMappingDialog(&midi_mapper).exec();
 757 }
 758
 759 void MainWindow::timecode_stream_triggered()
 760 {
 761         global_mixer->set_display_timecode_in_stream(ui->timecode_stream_action->isChecked());
 762 }
 763
 764 void MainWindow::timecode_stdout_triggered()
 765 {
 766         global_mixer->set_display_timecode_on_stdout(ui->timecode_stdout_action->isChecked());
 767 }
 768
 769 void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
 770 {
 771         if (bus_index == 0) {
 772                 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 773         }
 774         if (bus_index < audio_expanded_views.size()) {
 775                 audio_expanded_views[bus_index]->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 776         }
 777
 778         float gain_db = value * 0.1f;
 779         global_audio_mixer->set_gain_staging_db(bus_index, gain_db);
 780
 781         // The label will be updated by the audio level callback.
 782 }
 783
 784 void MainWindow::final_makeup_gain_knob_changed(int value)
 785 {
 786         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 787
 788         float gain_db = value * 0.1f;
 789         global_audio_mixer->set_final_makeup_gain_db(gain_db);
 790
 791         // The label will be updated by the audio level callback.
 792 }
 793
 794 void MainWindow::cutoff_knob_changed(int value)
 795 {
 796         float octaves = value * 0.1f;
 797         float cutoff_hz = 20.0 * pow(2.0, octaves);
 798         global_audio_mixer->set_locut_cutoff(cutoff_hz);
 799         update_cutoff_labels(cutoff_hz);
 800 }
 801
 802 void MainWindow::update_cutoff_labels(float cutoff_hz)
 803 {
 804         char buf[256];
 805         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 806         ui->locut_cutoff_display->setText(buf);
 807         ui->locut_cutoff_display_2->setText(buf);
 808
 809         for (unsigned bus_index = 0; bus_index < audio_expanded_views.size(); ++bus_index) {
 810                 audio_expanded_views[bus_index]->locut_enabled->setText(
 811                         QString("Lo-cut: ") + buf);
 812         }
 813 }
 814
 815 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left, double file_length_seconds)
 816 {
 817         char time_str[256];
 818         if (estimated_seconds_left < 60.0) {
 819                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 820         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 821                 int s = lrintf(estimated_seconds_left);
 822                 int m = s / 60;
 823                 s %= 60;
 824                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 825         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 826                 int m = lrintf(estimated_seconds_left / 60.0);
 827                 snprintf(time_str, sizeof(time_str), "%dm", m);
 828         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 829                 int m = lrintf(estimated_seconds_left / 60.0);
 830                 int h = m / 60;
 831                 m %= 60;
 832                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 833         } else {  // More than ten hours: Xh.
 834                 int h = lrintf(estimated_seconds_left / 3600.0);
 835                 snprintf(time_str, sizeof(time_str), "%dh", h);
 836         }
 837         char buf[256];
 838         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 839
 840         // NOTE: The default formatter does not use file_length_seconds for anything,
 841         // but the theme might want to do so.
 842         std::string label = global_mixer->format_status_line(buf, file_length_seconds);
 843
 844         post_to_main_thread([this, label]{
 845                 disk_free_label->setText(QString::fromStdString(label));
 846                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 847         });
 848 }
 849
 850 void MainWindow::stereo_width_knob_changed(unsigned bus_index, int value)
 851 {
 852         float stereo_width = value * 0.01f;
 853         global_audio_mixer->set_stereo_width(bus_index, stereo_width);
 854
 855         update_stereo_label(bus_index, value);
 856 }
 857
 858 void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
 859 {
 860         float gain_db = value * 0.1f;
 861         global_audio_mixer->set_eq(bus_index, band, gain_db);
 862
 863         update_eq_label(bus_index, band, gain_db);
 864 }
 865
 866 void MainWindow::update_stereo_knob_and_label(unsigned bus_index, int stereo_width_percent)
 867 {
 868         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 869
 870         if (global_audio_mixer->is_mono(bus_index)) {
 871                 view->stereo_width_knob->setEnabled(false);
 872                 view->stereo_width_label->setEnabled(false);
 873         } else {
 874                 view->stereo_width_knob->setEnabled(true);
 875                 view->stereo_width_label->setEnabled(true);
 876         }
 877         view->stereo_width_knob->setValue(stereo_width_percent);
 878         update_stereo_label(bus_index, stereo_width_percent);
 879 }
 880
 881 void MainWindow::update_stereo_label(unsigned bus_index, int stereo_width_percent)
 882 {
 883         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 884
 885         if (global_audio_mixer->is_mono(bus_index)) {
 886                 view->stereo_width_label->setText("Mono");
 887         } else {
 888                 char buf[256];
 889                 snprintf(buf, sizeof(buf), "Stereo: %d%%", stereo_width_percent);
 890                 view->stereo_width_label->setText(buf);
 891         }
 892 }
 893
 894 void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
 895 {
 896         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 897         string db_string = format_db(gain_db, DB_WITH_SIGN);
 898         switch (band) {
 899         case EQ_BAND_TREBLE:
 900                 view->treble_label->setText(QString::fromStdString("Treble: " + db_string));
 901                 break;
 902         case EQ_BAND_MID:
 903                 view->mid_label->setText(QString::fromStdString("Mid: " + db_string));
 904                 break;
 905         case EQ_BAND_BASS:
 906                 view->bass_label->setText(QString::fromStdString("Bass: " + db_string));
 907                 break;
 908         default:
 909                 assert(false);
 910         }
 911 }
 912
 913 void MainWindow::setup_theme_menu()
 914 {
 915         Theme::MenuEntry *root_menu = global_mixer->get_theme_menu();
 916
 917         // Remove the old menu, if any.
 918         if (theme_menu != nullptr) {
 919                 ui->menuBar->removeAction(theme_menu->menuAction());
 920                 theme_menu = nullptr;
 921         }
 922
 923         if (root_menu != nullptr) {
 924                 assert(root_menu->is_submenu);
 925                 if (!root_menu->submenu.empty()) {
 926                         theme_menu = new QMenu("&Theme");
 927                         fill_menu_from_theme_menu(root_menu->submenu, theme_menu);
 928                         ui->menuBar->insertMenu(ui->menu_Help->menuAction(), theme_menu);
 929                 }
 930         }
 931 }
 932
 933 void MainWindow::fill_menu_from_theme_menu(const vector<unique_ptr<Theme::MenuEntry>> &entries, QMenu *menu)
 934 {
 935         for (const unique_ptr<Theme::MenuEntry> &entry : entries) {
 936                 if (entry->is_submenu) {
 937                         QMenu *submenu = new QMenu(QString::fromStdString(entry->text));
 938                         fill_menu_from_theme_menu(entry->submenu, submenu);
 939                         menu->addMenu(submenu);
 940                         continue;
 941                 }
 942
 943                 QAction *action = menu->addAction(QString::fromStdString(entry->text));
 944                 if (entry->entry.flags == Theme::MenuEntry::CHECKABLE) {
 945                         action->setCheckable(true);
 946                 } else if (entry->entry.flags == Theme::MenuEntry::CHECKED) {
 947                         action->setCheckable(true);
 948                         action->setChecked(true);
 949                 }
 950                 connect(action, &QAction::triggered, [lua_ref = entry->entry.lua_ref] {
 951                         global_mixer->theme_menu_entry_clicked(lua_ref);
 952                 });
 953         }
 954 }
 955
 956 void MainWindow::limiter_threshold_knob_changed(int value)
 957 {
 958         float threshold_dbfs = value * 0.1f;
 959         global_audio_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 960         ui->limiter_threshold_db_display->setText(
 961                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 962         ui->limiter_threshold_db_display_2->setText(
 963                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 964 }
 965
 966 void MainWindow::compressor_threshold_knob_changed(unsigned bus_index, int value)
 967 {
 968         float threshold_dbfs = value * 0.1f;
 969         global_audio_mixer->set_compressor_threshold_dbfs(bus_index, threshold_dbfs);
 970
 971         QString label(QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 972         if (bus_index == 0) {
 973                 ui->compressor_threshold_db_display->setText(label);
 974         }
 975         if (bus_index < audio_expanded_views.size()) {
 976                 audio_expanded_views[bus_index]->compressor_threshold_db_display->setText(label);
 977         }
 978 }
 979
 980 void MainWindow::mini_fader_changed(int bus, double volume_db)
 981 {
 982         QString label(QString::fromStdString(format_db(volume_db, DB_WITH_SIGN)));
 983         audio_miniviews[bus]->fader_label->setText(label);
 984         audio_expanded_views[bus]->fader_label->setText(label);
 985
 986         global_audio_mixer->set_fader_volume(bus, volume_db);
 987 }
 988
 989 void MainWindow::mute_button_toggled(int bus, bool checked)
 990 {
 991         global_audio_mixer->set_mute(bus, checked);
 992         midi_mapper.refresh_lights();
 993 }
 994
 995 void MainWindow::reset_meters_button_clicked()
 996 {
 997         global_audio_mixer->reset_meters();
 998         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
 999         ui->peak_display->setStyleSheet("");
1000 }
1001
1002 void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<AudioMixer::BusLevel> bus_levels,
1003                                       float global_level_lufs,
1004                                       float range_low_lufs, float range_high_lufs,
1005                                       float final_makeup_gain_db,
1006                                       float correlation)
1007 {
1008         steady_clock::time_point now = steady_clock::now();
1009
1010         // The meters are somewhat inefficient to update. Only update them
1011         // every 100 ms or so (we get updates every 5–20 ms). Note that this
1012         // means that the digital peak meters are ever so slightly too low
1013         // (each update won't be a faithful representation of the highest peak
1014         // since the previous update, since there are frames we won't draw),
1015         // but the _peak_ of the peak meters will be correct (it's tracked in
1016         // AudioMixer, not here), and that's much more important.
1017         double last_update_age = duration<double>(now - last_audio_level_callback).count();
1018         if (last_update_age < 0.100) {
1019                 return;
1020         }
1021         last_audio_level_callback = now;
1022
1023         post_to_main_thread([=]() {
1024                 ui->vu_meter->set_level(level_lufs);
1025                 for (unsigned bus_index = 0; bus_index < bus_levels.size(); ++bus_index) {
1026                         if (bus_index < audio_miniviews.size()) {
1027                                 const AudioMixer::BusLevel &level = bus_levels[bus_index];
1028                                 Ui::AudioMiniView *miniview = audio_miniviews[bus_index];
1029                                 miniview->peak_meter->set_level(
1030                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
1031                                 miniview->peak_meter->set_peak(
1032                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
1033                                 set_peak_label(miniview->peak_display_label, level.historic_peak_dbfs);
1034
1035                                 Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
1036                                 view->peak_meter->set_level(
1037                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
1038                                 view->peak_meter->set_peak(
1039                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
1040                                 view->reduction_meter->set_reduction_db(level.compressor_attenuation_db);
1041                                 view->gainstaging_knob->blockSignals(true);
1042                                 view->gainstaging_knob->setValue(lrintf(level.gain_staging_db * 10.0f));
1043                                 view->gainstaging_knob->blockSignals(false);
1044                                 view->gainstaging_db_display->setText(
1045                                         QString("Gain: ") +
1046                                         QString::fromStdString(format_db(level.gain_staging_db, DB_WITH_SIGN)));
1047                                 set_peak_label(view->peak_display_label, level.historic_peak_dbfs);
1048
1049                                 midi_mapper.set_has_peaked(bus_index, level.historic_peak_dbfs >= -0.1f);
1050                         }
1051                 }
1052                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
1053                 ui->correlation_meter->set_correlation(correlation);
1054
1055                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
1056                 set_peak_label(ui->peak_display, peak_db);
1057
1058                 // NOTE: Will be invisible when using multitrack audio.
1059                 if (!bus_levels.empty()) {
1060                         ui->gainstaging_knob->blockSignals(true);
1061                         ui->gainstaging_knob->setValue(lrintf(bus_levels[0].gain_staging_db * 10.0f));
1062                         ui->gainstaging_knob->blockSignals(false);
1063                         ui->gainstaging_db_display->setText(
1064                                 QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
1065                 }
1066
1067                 ui->makeup_gain_knob->blockSignals(true);
1068                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
1069                 ui->makeup_gain_knob->blockSignals(false);
1070                 ui->makeup_gain_db_display->setText(
1071                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
1072                 ui->makeup_gain_db_display_2->setText(
1073                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
1074
1075                 // Peak labels could have changed.
1076                 midi_mapper.refresh_lights();
1077         });
1078 }
1079
1080 void MainWindow::relayout()
1081 {
1082         int height = ui->vertical_layout->geometry().height();
1083         if (height <= 0) {
1084                 // Seemingly this can happen and must be ignored.
1085                 return;
1086         }
1087
1088         double remaining_height = height;
1089
1090         // Allocate the height; the most important part is to keep the main displays
1091         // at the right aspect if at all possible.
1092         double me_width = ui->me_preview->width();
1093         double me_height = me_width * double(global_flags.height) / double(global_flags.width) + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
1094
1095         // TODO: Scale the widths when we need to do this.
1096         if (me_height / double(height) > 0.8) {
1097                 me_height = height * 0.8;
1098         }
1099         remaining_height -= me_height + ui->vertical_layout->spacing();
1100
1101         // Space between the M/E displays and the audio strip.
1102         remaining_height -= ui->vertical_layout->spacing();
1103
1104         // The label above the audio strip.
1105         double compact_label_height = ui->compact_label->minimumHeight() +
1106                 ui->compact_audio_layout->spacing();
1107         remaining_height -= compact_label_height;
1108
1109         // The previews will be constrained by the remaining height, and the width.
1110         double preview_label_height = previews[0]->label->minimumSize().height() +
1111                 previews[0]->main_vertical_layout->spacing();
1112         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
1113         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * double(global_flags.height) / double(global_flags.width));
1114         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
1115
1116         ui->vertical_layout->setStretch(0, lrintf(me_height));
1117         ui->vertical_layout->setStretch(1,
1118                 lrintf(compact_label_height) +
1119                 lrintf(remaining_height) +
1120                 lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
1121
1122         ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
1123         ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
1124         ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
1125
1126         if (current_audio_view == 0) {  // Compact audio view.
1127                 // Set the widths for the previews.
1128                 double preview_width = preview_height * double(global_flags.width) / double(global_flags.height);
1129                 for (unsigned i = 0; i < previews.size(); ++i) {
1130                         ui->preview_displays->setStretch(i, lrintf(preview_width));
1131                 }
1132
1133                 // The preview horizontal spacer.
1134                 double remaining_preview_width = preview_total_width - previews.size() * preview_width;
1135                 ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
1136         } else if (current_audio_view == 2) {  // Video grid view.
1137                 // QGridLayout doesn't do it for us, since we need to be able to remove rows
1138                 // or columns as the grid changes, and it won't do that. Thus, position everything
1139                 // by hand.
1140                 constexpr int spacing = 6;
1141                 int grid_width = ui->preview_displays_grid->geometry().width();
1142                 int grid_height = ui->preview_displays_grid->geometry().height();
1143                 int best_preview_width = 0;
1144                 unsigned best_num_rows = 1, best_num_cols = 1;
1145                 for (unsigned num_rows = 1; num_rows <= previews.size(); ++num_rows) {
1146                         int num_cols = (previews.size() + num_rows - 1) / num_rows;
1147
1148                         int max_preview_height = (grid_height - spacing * (num_rows - 1)) / num_rows - preview_label_height;
1149                         int max_preview_width = (grid_width - spacing * (num_cols - 1)) / num_cols;
1150                         int preview_width = std::min<int>(max_preview_width, max_preview_height * double(global_flags.width) / double(global_flags.height));
1151
1152                         if (preview_width > best_preview_width) {
1153                                 best_preview_width = preview_width;
1154                                 best_num_rows = num_rows;
1155                                 best_num_cols = num_cols;
1156                         }
1157                 }
1158
1159                 double cell_height = lrintf(best_preview_width * double(global_flags.height) / double(global_flags.width)) + preview_label_height;
1160                 remaining_height = grid_height - best_num_rows * cell_height - (best_num_rows - 1) * spacing;
1161                 int cell_width = best_preview_width;
1162                 int remaining_width = grid_width - best_num_cols * cell_width - (best_num_cols - 1) * spacing;
1163
1164                 for (unsigned i = 0; i < previews.size(); ++i) {
1165                         int col_idx = i % best_num_cols;
1166                         int row_idx = i / best_num_cols;
1167
1168                         double top = remaining_height * 0.5f + row_idx * (cell_height + spacing);
1169                         double bottom = top + cell_height;
1170                         double left = remaining_width * 0.5f + col_idx * (cell_width + spacing);
1171                         double right = left + cell_width;
1172
1173                         QRect rect;
1174                         rect.setTop(lrintf(top));
1175                         rect.setBottom(lrintf(bottom));
1176                         rect.setLeft(lrintf(left));
1177                         rect.setRight(lrintf(right));
1178
1179                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1180                         display->setGeometry(rect);
1181                         display->show();
1182                 }
1183         }
1184 }
1185
1186 void MainWindow::set_locut(float value)
1187 {
1188         set_relative_value(ui->locut_cutoff_knob, value);
1189 }
1190
1191 void MainWindow::set_limiter_threshold(float value)
1192 {
1193         set_relative_value(ui->limiter_threshold_knob, value);
1194 }
1195
1196 void MainWindow::set_makeup_gain(float value)
1197 {
1198         set_relative_value(ui->makeup_gain_knob, value);
1199 }
1200
1201 void MainWindow::set_stereo_width(unsigned bus_idx, float value)
1202 {
1203         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::stereo_width_knob, value);
1204 }
1205
1206 void MainWindow::set_treble(unsigned bus_idx, float value)
1207 {
1208         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, value);
1209 }
1210
1211 void MainWindow::set_eq_absolute(unsigned bus_idx, EQBand eq_band, float value_db)
1212 {
1213         if (eq_band == EQ_BAND_TREBLE) {
1214                 set_db_value_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, value_db);
1215         } else if (eq_band == EQ_BAND_MID) {
1216                 set_db_value_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, value_db);
1217         } else if (eq_band == EQ_BAND_BASS) {
1218                 set_db_value_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, value_db);
1219         } else {
1220                 assert(false);
1221         }
1222 }
1223
1224 void MainWindow::set_mid(unsigned bus_idx, float value)
1225 {
1226         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, value);
1227 }
1228
1229 void MainWindow::set_bass(unsigned bus_idx, float value)
1230 {
1231         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, value);
1232 }
1233
1234 void MainWindow::set_gain(unsigned bus_idx, float value)
1235 {
1236         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, value);
1237 }
1238
1239 void MainWindow::set_compressor_threshold(unsigned bus_idx, float value)
1240 {
1241         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, value);
1242 }
1243
1244 void MainWindow::set_fader(unsigned bus_idx, float value)
1245 {
1246         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::fader, value);
1247 }
1248
1249 void MainWindow::set_fader_absolute(unsigned bus_idx, float value_db)
1250 {
1251         if (global_audio_mixer != nullptr &&
1252             global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1253             bus_idx < audio_expanded_views.size()) {
1254                 audio_expanded_views[bus_idx]->fader->setDbValue(value_db);
1255         }
1256 }
1257
1258 void MainWindow::toggle_mute(unsigned bus_idx)
1259 {
1260         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button);
1261 }
1262
1263 void MainWindow::toggle_locut(unsigned bus_idx)
1264 {
1265         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled);
1266 }
1267
1268 void MainWindow::toggle_auto_gain_staging(unsigned bus_idx)
1269 {
1270         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox);
1271 }
1272
1273 void MainWindow::toggle_compressor(unsigned bus_idx)
1274 {
1275         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled);
1276 }
1277
1278 void MainWindow::clear_peak(unsigned bus_idx)
1279 {
1280         post_to_main_thread([=]{
1281                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1282                         global_audio_mixer->reset_peak(bus_idx);
1283                         midi_mapper.set_has_peaked(bus_idx, false);
1284                         midi_mapper.refresh_lights();
1285                 }
1286         });
1287 }
1288
1289 void MainWindow::clear_all_highlights()
1290 {
1291         post_to_main_thread([this]{
1292                 highlight_locut(false);
1293                 highlight_limiter_threshold(false);
1294                 highlight_makeup_gain(false);
1295                 highlight_toggle_limiter(false);
1296                 highlight_toggle_auto_makeup_gain(false);
1297                 for (unsigned bus_idx = 0; bus_idx < audio_expanded_views.size(); ++bus_idx) {
1298                         highlight_treble(bus_idx, false);
1299                         highlight_mid(bus_idx, false);
1300                         highlight_bass(bus_idx, false);
1301                         highlight_gain(bus_idx, false);
1302                         highlight_compressor_threshold(bus_idx, false);
1303                         highlight_fader(bus_idx, false);
1304                         highlight_mute(bus_idx, false);
1305                         highlight_toggle_locut(bus_idx, false);
1306                         highlight_toggle_auto_gain_staging(bus_idx, false);
1307                         highlight_toggle_compressor(bus_idx, false);
1308                 }
1309         });
1310 }
1311
1312 void MainWindow::toggle_limiter()
1313 {
1314         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1315                 ui->limiter_enabled->click();
1316         }
1317 }
1318
1319 void MainWindow::toggle_auto_makeup_gain()
1320 {
1321         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1322                 ui->makeup_gain_auto_checkbox->click();
1323         }
1324 }
1325
1326 void MainWindow::switch_video_channel(int channel_number)
1327 {
1328         global_mixer->channel_clicked(channel_number);
1329 }
1330
1331 void MainWindow::apply_transition(int transition_number)
1332 {
1333         global_mixer->transition_clicked(transition_number);
1334 }
1335
1336 void MainWindow::prev_audio_view()
1337 {
1338         post_to_main_thread([this]{
1339                 prev_page();
1340         });
1341 }
1342
1343 void MainWindow::next_audio_view()
1344 {
1345         post_to_main_thread([this]{
1346                 next_page();
1347         });
1348 }
1349
1350 void MainWindow::begin_new_segment()
1351 {
1352         global_mixer->schedule_cut();
1353 }
1354
1355 void MainWindow::exit()
1356 {
1357         post_to_main_thread([this]{
1358                 close();
1359         });
1360 }
1361
1362 void MainWindow::highlight_locut(bool highlight)
1363 {
1364         post_to_main_thread([this, highlight]{
1365                 highlight_control(ui->locut_cutoff_knob, highlight);
1366                 highlight_control(ui->locut_cutoff_knob_2, highlight);
1367         });
1368 }
1369
1370 void MainWindow::highlight_limiter_threshold(bool highlight)
1371 {
1372         post_to_main_thread([this, highlight]{
1373                 highlight_control(ui->limiter_threshold_knob, highlight);
1374                 highlight_control(ui->limiter_threshold_knob_2, highlight);
1375         });
1376 }
1377
1378 void MainWindow::highlight_makeup_gain(bool highlight)
1379 {
1380         post_to_main_thread([this, highlight]{
1381                 highlight_control(ui->makeup_gain_knob, highlight);
1382                 highlight_control(ui->makeup_gain_knob_2, highlight);
1383         });
1384 }
1385
1386 void MainWindow::highlight_stereo_width(unsigned bus_idx, bool highlight)
1387 {
1388         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::stereo_width_knob, highlight);
1389 }
1390
1391 void MainWindow::highlight_treble(unsigned bus_idx, bool highlight)
1392 {
1393         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, highlight);
1394 }
1395
1396 void MainWindow::highlight_mid(unsigned bus_idx, bool highlight)
1397 {
1398         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, highlight);
1399 }
1400
1401 void MainWindow::highlight_bass(unsigned bus_idx, bool highlight)
1402 {
1403         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, highlight);
1404 }
1405
1406 void MainWindow::highlight_gain(unsigned bus_idx, bool highlight)
1407 {
1408         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, highlight);
1409 }
1410
1411 void MainWindow::highlight_compressor_threshold(unsigned bus_idx, bool highlight)
1412 {
1413         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, highlight);
1414 }
1415
1416 void MainWindow::highlight_fader(unsigned bus_idx, bool highlight)
1417 {
1418         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::fader, highlight);
1419 }
1420
1421 void MainWindow::highlight_mute(unsigned bus_idx, bool highlight)
1422 {
1423         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button, highlight, /*is_mute_btton=*/true);
1424 }
1425
1426 void MainWindow::highlight_toggle_locut(unsigned bus_idx, bool highlight)
1427 {
1428         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled, highlight);
1429 }
1430
1431 void MainWindow::highlight_toggle_auto_gain_staging(unsigned bus_idx, bool highlight)
1432 {
1433         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox, highlight);
1434 }
1435
1436 void MainWindow::highlight_toggle_compressor(unsigned bus_idx, bool highlight)
1437 {
1438         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled, highlight);
1439 }
1440
1441 void MainWindow::highlight_toggle_limiter(bool highlight)
1442 {
1443         post_to_main_thread([this, highlight]{
1444                 highlight_control(ui->limiter_enabled, highlight);
1445                 highlight_control(ui->limiter_enabled_2, highlight);
1446         });
1447 }
1448
1449 void MainWindow::highlight_toggle_auto_makeup_gain(bool highlight)
1450 {
1451         post_to_main_thread([this, highlight]{
1452                 highlight_control(ui->makeup_gain_auto_checkbox, highlight);
1453                 highlight_control(ui->makeup_gain_auto_checkbox_2, highlight);
1454         });
1455 }
1456
1457 template<class T>
1458 void MainWindow::set_relative_value(T *control, float value)
1459 {
1460         post_to_main_thread([control, value]{
1461                 control->setValue(lrintf(control->minimum() + value * (control->maximum() - control->minimum())));
1462         });
1463 }
1464
1465 template<class T>
1466 void MainWindow::set_relative_value_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), float value)
1467 {
1468         if (global_audio_mixer != nullptr &&
1469             global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1470             bus_idx < audio_expanded_views.size()) {
1471                 set_relative_value(audio_expanded_views[bus_idx]->*control, value);
1472         }
1473 }
1474
1475 void MainWindow::set_db_value_if_exists(unsigned bus_idx, QDial *(Ui_AudioExpandedView::*control), float value_db)
1476 {
1477         post_to_main_thread([this, bus_idx, control, value_db]{
1478                 if (global_audio_mixer != nullptr &&
1479                     global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1480                     bus_idx < audio_expanded_views.size()) {
1481                         int value = lrintf(value_db * 10.0f);
1482                         (audio_expanded_views[bus_idx]->*control)->setValue(value);
1483                 }
1484         });
1485 }
1486
1487 template<class T>
1488 void MainWindow::click_button_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control))
1489 {
1490         post_to_main_thread([this, bus_idx, control]{
1491                 if (global_audio_mixer != nullptr &&
1492                     global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1493                     bus_idx < audio_expanded_views.size()) {
1494                         (audio_expanded_views[bus_idx]->*control)->click();
1495                 }
1496         });
1497 }
1498
1499 template<class T>
1500 void MainWindow::highlight_control(T *control, bool highlight)
1501 {
1502         if (control == nullptr) {
1503                 return;
1504         }
1505         if (global_audio_mixer == nullptr ||
1506             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1507                 highlight = false;
1508         }
1509         if (highlight) {
1510                 control->setStyleSheet("background: rgb(0,255,0,80)");
1511         } else {
1512                 control->setStyleSheet("");
1513         }
1514 }
1515
1516 template<class T>
1517 void MainWindow::highlight_mute_control(T *control, bool highlight)
1518 {
1519         if (control == nullptr) {
1520                 return;
1521         }
1522         if (global_audio_mixer == nullptr ||
1523             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1524                 highlight = false;
1525         }
1526         if (highlight) {
1527                 control->setStyleSheet("QPushButton { background: rgb(0,255,0,80); } QPushButton:checked { background: rgba(255,80,0,140); }");
1528         } else {
1529                 control->setStyleSheet("QPushButton:checked { background: rgba(255,0,0,80); }");
1530         }
1531 }
1532
1533 template<class T>
1534 void MainWindow::highlight_control_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), bool highlight, bool is_mute_button)
1535 {
1536         post_to_main_thread([this, bus_idx, control, highlight, is_mute_button]{
1537                 if (bus_idx < audio_expanded_views.size()) {
1538                         if (is_mute_button) {
1539                                 highlight_mute_control(audio_expanded_views[bus_idx]->*control, highlight);
1540                         } else {
1541                                 highlight_control(audio_expanded_views[bus_idx]->*control, highlight);
1542                         }
1543                 }
1544         });
1545 }
1546
1547 void MainWindow::set_transition_names(vector<string> transition_names)
1548 {
1549         if (transition_names.size() < 1 || transition_names[0].empty()) {
1550                 transition_btn1->setText(QString(""));
1551         } else {
1552                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
1553                 ui->transition_btn1->setShortcut(QKeySequence("J"));
1554         }
1555         if (transition_names.size() < 2 || transition_names[1].empty()) {
1556                 transition_btn2->setText(QString(""));
1557         } else {
1558                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
1559                 ui->transition_btn2->setShortcut(QKeySequence("K"));
1560         }
1561         if (transition_names.size() < 3 || transition_names[2].empty()) {
1562                 transition_btn3->setText(QString(""));
1563         } else {
1564                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
1565                 ui->transition_btn3->setShortcut(QKeySequence("L"));
1566         }
1567 }
1568
1569 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
1570 {
1571         if (output == Mixer::OUTPUT_LIVE) {
1572                 ui->label_live->setText(name.c_str());
1573         } else if (output == Mixer::OUTPUT_PREVIEW) {
1574                 ui->label_preview->setText(name.c_str());
1575         } else if (output >= Mixer::OUTPUT_INPUT0) {
1576                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1577                 previews[channel]->label->setText(name.c_str());
1578         }
1579
1580         analyzer->update_channel_name(output, name);
1581 }
1582
1583 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
1584 {
1585         if (output >= Mixer::OUTPUT_INPUT0) {
1586                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1587                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
1588         }
1589 }
1590
1591 void MainWindow::transition_clicked(int transition_number)
1592 {
1593         global_mixer->transition_clicked(transition_number);
1594 }
1595
1596 void MainWindow::channel_clicked(int channel_number)
1597 {
1598         if (current_wb_pick_display == channel_number) {
1599                 // The picking was already done from eventFilter(), since we don't get
1600                 // the mouse pointer here.
1601         } else {
1602                 global_mixer->channel_clicked(channel_number);
1603         }
1604 }
1605
1606 void MainWindow::quick_cut_activated(int channel_number)
1607 {
1608         if (!global_flags.enable_quick_cut_keys) {
1609                 return;
1610         }
1611         global_mixer->channel_clicked(channel_number);
1612         global_mixer->transition_clicked(0);
1613 }
1614
1615 void MainWindow::wb_button_clicked(int channel_number)
1616 {
1617         current_wb_pick_display = channel_number;
1618         QApplication::setOverrideCursor(Qt::CrossCursor);
1619 }
1620
1621 void MainWindow::audio_view_changed(int audio_view)
1622 {
1623         if (audio_view == current_audio_view) {
1624                 return;
1625         }
1626
1627         if (audio_view == 0) {
1628                 // Compact audio view. (1, full audio view, has no video previews.)
1629                 for (unsigned i = 0; i < previews.size(); ++i) {
1630                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1631                         ui->preview_displays->insertWidget(i, display, 1);
1632                 }
1633         } else if (audio_view == 2) {
1634                 // Video grid display.
1635                 for (unsigned i = 0; i < previews.size(); ++i) {
1636                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1637                         display->setParent(ui->preview_displays_grid);
1638                         display->show();
1639                 }
1640         }
1641
1642         current_audio_view = audio_view;
1643
1644         // Ask for a relayout, but only after the event loop is done doing relayout
1645         // on everything else.
1646         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
1647 }
1648
1649 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
1650 {
1651         if (current_wb_pick_display != -1 &&
1652             event->type() == QEvent::MouseButtonRelease &&
1653             watched->isWidgetType()) {
1654                 QApplication::restoreOverrideCursor();
1655                 if (watched == previews[current_wb_pick_display]->display) {
1656                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
1657                         previews[current_wb_pick_display]->display->grab_white_balance(
1658                                 current_wb_pick_display,
1659                                 mouse_event->x(), mouse_event->y());
1660                 } else {
1661                         // The user clicked on something else, give up.
1662                         // (The click goes through, which might not be ideal, but, yes.)
1663                         current_wb_pick_display = -1;
1664                 }
1665         }
1666         return false;
1667 }
1668
1669 void MainWindow::closeEvent(QCloseEvent *event)
1670 {
1671         if (global_mixer->get_num_connected_clients() > 0) {
1672                 QMessageBox::StandardButton reply =
1673                         QMessageBox::question(this, "Nageru", "There are clients connected. Do you really want to quit?",
1674                                 QMessageBox::Yes | QMessageBox::No);
1675                 if (reply != QMessageBox::Yes) {
1676                         event->ignore();
1677                         return;
1678                 }
1679         }
1680
1681         analyzer->hide();
1682         global_mixer->quit();
1683         mixer_shutting_down();
1684         event->accept();
1685 }
1686
1687 void MainWindow::audio_state_changed()
1688 {
1689         post_to_main_thread([this]{
1690                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
1691                         return;
1692                 }
1693                 InputMapping mapping = global_audio_mixer->get_input_mapping();
1694                 for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
1695                         string label = get_bus_desc_label(mapping.buses[bus_index]);
1696                         audio_miniviews[bus_index]->bus_desc_label->setFullText(
1697                                 QString::fromStdString(label));
1698                         audio_expanded_views[bus_index]->bus_desc_label->setFullText(
1699                                 QString::fromStdString(label));
1700                 }
1701         });
1702 }