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