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

   1 #include "mainwindow.h"
   2
   3 #include <math.h>
   4 #include <stdio.h>
   5 #include <signal.h>
   6 #include <algorithm>
   7 #include <chrono>
   8 #include <string>
   9 #include <vector>
  10 #include <QBoxLayout>
  11 #include <QInputDialog>
  12 #include <QKeySequence>
  13 #include <QLabel>
  14 #include <QMessageBox>
  15 #include <QMetaType>
  16 #include <QPushButton>
  17 #include <QResizeEvent>
  18 #include <QShortcut>
  19 #include <QSize>
  20 #include <QString>
  21
  22 #include "aboutdialog.h"
  23 #include "disk_space_estimator.h"
  24 #include "flags.h"
  25 #include "glwidget.h"
  26 #include "input_mapping_dialog.h"
  27 #include "lrameter.h"
  28 #include "midi_mapping.pb.h"
  29 #include "mixer.h"
  30 #include "post_to_main_thread.h"
  31 #include "ui_audio_miniview.h"
  32 #include "ui_audio_expanded_view.h"
  33 #include "ui_display.h"
  34 #include "ui_mainwindow.h"
  35 #include "vumeter.h"
  36
  37 class QResizeEvent;
  38
  39 using namespace std;
  40 using namespace std::chrono;
  41 using namespace std::placeholders;
  42
  43 Q_DECLARE_METATYPE(std::string);
  44 Q_DECLARE_METATYPE(std::vector<std::string>);
  45
  46 MainWindow *global_mainwindow = nullptr;
  47
  48 namespace {
  49
  50 void schedule_cut_signal(int ignored)
  51 {
  52         global_mixer->schedule_cut();
  53 }
  54
  55 void quit_signal(int ignored)
  56 {
  57         global_mainwindow->close();
  58 }
  59
  60 void slave_knob(QDial *master, QDial *slave)
  61 {
  62         QWidget::connect(master, &QDial::valueChanged, [slave](int value){
  63                 slave->blockSignals(true);
  64                 slave->setValue(value);
  65                 slave->blockSignals(false);
  66         });
  67         QWidget::connect(slave, &QDial::valueChanged, [master](int value){
  68                 master->setValue(value);
  69         });
  70 }
  71
  72 void slave_checkbox(QCheckBox *master, QCheckBox *slave)
  73 {
  74         QWidget::connect(master, &QCheckBox::stateChanged, [slave](int state){
  75                 slave->blockSignals(true);
  76                 slave->setCheckState(Qt::CheckState(state));
  77                 slave->blockSignals(false);
  78         });
  79         QWidget::connect(slave, &QCheckBox::stateChanged, [master](int state){
  80                 master->setCheckState(Qt::CheckState(state));
  81         });
  82 }
  83
  84 void slave_fader(NonLinearFader *master, NonLinearFader *slave)
  85 {
  86         QWidget::connect(master, &NonLinearFader::dbValueChanged, [slave](double value) {
  87                 slave->blockSignals(true);
  88                 slave->setDbValue(value);
  89                 slave->blockSignals(false);
  90         });
  91         QWidget::connect(slave, &NonLinearFader::dbValueChanged, [master](double value){
  92                 master->setDbValue(value);
  93         });
  94 }
  95
  96 constexpr unsigned DB_NO_FLAGS = 0x0;
  97 constexpr unsigned DB_WITH_SIGN = 0x1;
  98 constexpr unsigned DB_BARE = 0x2;
  99
 100 string format_db(double db, unsigned flags)
 101 {
 102         string text;
 103         if (flags & DB_WITH_SIGN) {
 104                 if (isfinite(db)) {
 105                         char buf[256];
 106                         snprintf(buf, sizeof(buf), "%+.1f", db);
 107                         text = buf;
 108                 } else if (db < 0.0) {
 109                         text = "-∞";
 110                 } else {
 111                         // Should never happen, really.
 112                         text = "+∞";
 113                 }
 114         } else {
 115                 if (isfinite(db)) {
 116                         char buf[256];
 117                         snprintf(buf, sizeof(buf), "%.1f", db);
 118                         text = buf;
 119                 } else if (db < 0.0) {
 120                         text = "-∞";
 121                 } else {
 122                         // Should never happen, really.
 123                         text = "∞";
 124                 }
 125         }
 126         if (!(flags & DB_BARE)) {
 127                 text += " dB";
 128         }
 129         return text;
 130 }
 131
 132 void set_peak_label(QLabel *peak_label, float peak_db)
 133 {
 134         peak_label->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 135
 136         // -0.1 dBFS is EBU peak limit. We use it consistently, even for the bus meters
 137         // (which don't calculate interpolate peak, and in general don't follow EBU recommendations).
 138         if (peak_db > -0.1f) {
 139                 peak_label->setStyleSheet("QLabel { background-color: red; color: white; }");
 140         } else {
 141                 peak_label->setStyleSheet("");
 142         }
 143 }
 144
 145 }  // namespace
 146
 147 MainWindow::MainWindow()
 148         : ui(new Ui::MainWindow), midi_mapper(this)
 149 {
 150         global_mainwindow = this;
 151         ui->setupUi(this);
 152
 153         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 154         disk_free_label = new QLabel(this);
 155         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 156         ui->menuBar->setCornerWidget(disk_free_label);
 157
 158         QActionGroup *audio_mapping_group = new QActionGroup(this);
 159         ui->simple_audio_mode->setActionGroup(audio_mapping_group);
 160         ui->multichannel_audio_mode->setActionGroup(audio_mapping_group);
 161
 162         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
 163         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
 164
 165         // The menus.
 166         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
 167         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
 168         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
 169         connect(ui->simple_audio_mode, &QAction::triggered, this, &MainWindow::simple_audio_mode_triggered);
 170         connect(ui->multichannel_audio_mode, &QAction::triggered, this, &MainWindow::multichannel_audio_mode_triggered);
 171         connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
 172
 173         if (global_flags.x264_video_to_http) {
 174                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
 175         } else {
 176                 ui->x264_bitrate_action->setEnabled(false);
 177         }
 178
 179         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 180         // TODO: Make them dynamic.
 181         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
 182         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
 183         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 184
 185         // Aiee...
 186         transition_btn1 = ui->transition_btn1;
 187         transition_btn2 = ui->transition_btn2;
 188         transition_btn3 = ui->transition_btn3;
 189         qRegisterMetaType<string>("std::string");
 190         qRegisterMetaType<vector<string>>("std::vector<std::string>");
 191         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 192         qRegisterMetaType<Mixer::Output>("Mixer::Output");
 193
 194         // Hook up the prev/next buttons on the audio views.
 195         connect(ui->compact_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 196         connect(ui->compact_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 197         connect(ui->full_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 198         connect(ui->full_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 199
 200         // And bind the same to PgUp/PgDown.
 201         auto switch_page = [this]{
 202                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 203                         ui->audio_views->setCurrentIndex(1 - ui->audio_views->currentIndex());
 204                 }
 205         };
 206         connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, switch_page);
 207         connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, switch_page);
 208
 209         last_audio_level_callback = steady_clock::now() - seconds(1);
 210
 211         if (!global_flags.midi_mapping_filename.empty()) {
 212                 MIDIMappingProto midi_mapping;
 213                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 214                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 215                                 global_flags.midi_mapping_filename.c_str());
 216                         exit(1);
 217                 }
 218                 midi_mapper.set_midi_mapping(midi_mapping);
 219         }
 220         midi_mapper.start_thread();
 221 }
 222
 223 void MainWindow::resizeEvent(QResizeEvent* event)
 224 {
 225         QMainWindow::resizeEvent(event);
 226
 227         // Ask for a relayout, but only after the event loop is done doing relayout
 228         // on everything else.
 229         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 230 }
 231
 232 void MainWindow::mixer_created(Mixer *mixer)
 233 {
 234         // Make the previews.
 235         unsigned num_previews = mixer->get_num_channels();
 236
 237         for (unsigned i = 0; i < num_previews; ++i) {
 238                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 239
 240                 QWidget *preview = new QWidget(this);
 241                 Ui::Display *ui_display = new Ui::Display;
 242                 ui_display->setupUi(preview);
 243                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 244                 ui_display->display->set_output(output);
 245                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
 246                 previews.push_back(ui_display);
 247
 248                 // Hook up the click.
 249                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 250
 251                 // Let the theme update the text whenever the resolution or color changed.
 252                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 253                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 254
 255                 // Hook up the keyboard key.
 256                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 257                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 258
 259                 // Hook up the white balance button (irrelevant if invisible).
 260                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 261                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 262         }
 263
 264         global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
 265
 266         slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
 267         slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
 268         slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
 269         slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
 270         slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
 271
 272         reset_audio_mapping_ui();
 273
 274         // TODO: Fetch all of the values these for completeness,
 275         // not just the enable knobs implied by flags.
 276         ui->limiter_enabled->setChecked(global_audio_mixer->get_limiter_enabled());
 277         ui->makeup_gain_auto_checkbox->setChecked(global_audio_mixer->get_final_makeup_gain_auto());
 278
 279         // Controls used only for simple audio fetch their state from the first bus.
 280         constexpr unsigned simple_bus_index = 0;
 281         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 282                 ui->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(simple_bus_index));
 283                 ui->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(simple_bus_index));
 284                 ui->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(simple_bus_index));
 285                 ui->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(simple_bus_index));
 286                 ui->compressor_threshold_db_display->setText(
 287                         QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(simple_bus_index), DB_WITH_SIGN)));
 288         }
 289         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 290                 global_audio_mixer->set_locut_enabled(simple_bus_index, state == Qt::Checked);
 291         });
 292         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged,
 293                 bind(&MainWindow::gain_staging_knob_changed, this, simple_bus_index, _1));
 294         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 295                 global_audio_mixer->set_gain_staging_auto(simple_bus_index, state == Qt::Checked);
 296         });
 297         connect(ui->compressor_threshold_knob, &QDial::valueChanged,
 298                 bind(&MainWindow::compressor_threshold_knob_changed, this, simple_bus_index, _1));
 299         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 300                 global_audio_mixer->set_compressor_enabled(simple_bus_index, state == Qt::Checked);
 301         });
 302
 303         // Global mastering controls.
 304         QString limiter_threshold_label(
 305                 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
 306         ui->limiter_threshold_db_display->setText(limiter_threshold_label);
 307         ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
 308
 309         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 310         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 311
 312         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 313         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 314                 global_audio_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 315         });
 316
 317         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 318         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 319                 global_audio_mixer->set_limiter_enabled(state == Qt::Checked);
 320         });
 321         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 322         mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 323
 324         struct sigaction act;
 325         memset(&act, 0, sizeof(act));
 326         act.sa_handler = schedule_cut_signal;
 327         act.sa_flags = SA_RESTART;
 328         sigaction(SIGHUP, &act, nullptr);
 329
 330         // Mostly for debugging. Don't override SIGINT, that's so evil if
 331         // shutdown isn't instant.
 332         memset(&act, 0, sizeof(act));
 333         act.sa_handler = quit_signal;
 334         act.sa_flags = SA_RESTART;
 335         sigaction(SIGUSR1, &act, nullptr);
 336 }
 337
 338 void MainWindow::reset_audio_mapping_ui()
 339 {
 340         bool simple = (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE);
 341
 342         ui->simple_audio_mode->setChecked(simple);
 343         ui->multichannel_audio_mode->setChecked(!simple);
 344         ui->input_mapping_action->setEnabled(!simple);
 345
 346         ui->locut_enabled->setVisible(simple);
 347         ui->gainstaging_label->setVisible(simple);
 348         ui->gainstaging_knob->setVisible(simple);
 349         ui->gainstaging_db_display->setVisible(simple);
 350         ui->gainstaging_auto_checkbox->setVisible(simple);
 351         ui->compressor_threshold_label->setVisible(simple);
 352         ui->compressor_threshold_knob->setVisible(simple);
 353         ui->compressor_threshold_db_display->setVisible(simple);
 354         ui->compressor_enabled->setVisible(simple);
 355
 356         setup_audio_miniview();
 357         setup_audio_expanded_view();
 358
 359         if (simple) {
 360                 ui->audio_views->setCurrentIndex(0);
 361         }
 362         ui->compact_header->setVisible(!simple);
 363 }
 364
 365 void MainWindow::setup_audio_miniview()
 366 {
 367         // Remove any existing channels.
 368         for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
 369                 delete item->widget();
 370                 delete item;
 371         }
 372         audio_miniviews.clear();
 373
 374         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 375                 return;
 376         }
 377
 378         // Set up brand new ones from the input mapping.
 379         InputMapping mapping = global_audio_mixer->get_input_mapping();
 380         audio_miniviews.resize(mapping.buses.size());
 381         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 382                 QWidget *channel = new QWidget(this);
 383                 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
 384                 ui_audio_miniview->setupUi(channel);
 385                 ui_audio_miniview->bus_desc_label->setFullText(
 386                         QString::fromStdString(mapping.buses[bus_index].name));
 387                 audio_miniviews[bus_index] = ui_audio_miniview;
 388
 389                 // Set up the peak meter.
 390                 VUMeter *peak_meter = ui_audio_miniview->peak_meter;
 391                 peak_meter->set_min_level(-30.0f);
 392                 peak_meter->set_max_level(0.0f);
 393                 peak_meter->set_ref_level(0.0f);
 394
 395                 ui_audio_miniview->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 396
 397                 ui->faders->addWidget(channel);
 398
 399                 connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
 400                         bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
 401                 connect(ui_audio_miniview->peak_display_label, &ClickableLabel::clicked,
 402                         [bus_index]() {
 403                                 global_audio_mixer->reset_peak(bus_index);
 404                         });
 405         }
 406 }
 407
 408 void MainWindow::setup_audio_expanded_view()
 409 {
 410         // Remove any existing channels.
 411         for (QLayoutItem *item; (item = ui->buses->takeAt(0)) != nullptr; ) {
 412                 delete item->widget();
 413                 delete item;
 414         }
 415         audio_expanded_views.clear();
 416
 417         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 418                 return;
 419         }
 420
 421         // Set up brand new ones from the input mapping.
 422         InputMapping mapping = global_audio_mixer->get_input_mapping();
 423         audio_expanded_views.resize(mapping.buses.size());
 424         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 425                 QWidget *channel = new QWidget(this);
 426                 Ui::AudioExpandedView *ui_audio_expanded_view = new Ui::AudioExpandedView;
 427                 ui_audio_expanded_view->setupUi(channel);
 428                 ui_audio_expanded_view->bus_desc_label->setFullText(
 429                         QString::fromStdString(mapping.buses[bus_index].name));
 430                 audio_expanded_views[bus_index] = ui_audio_expanded_view;
 431                 update_eq_label(bus_index, EQ_BAND_TREBLE, global_audio_mixer->get_eq(bus_index, EQ_BAND_TREBLE));
 432                 update_eq_label(bus_index, EQ_BAND_MID, global_audio_mixer->get_eq(bus_index, EQ_BAND_MID));
 433                 update_eq_label(bus_index, EQ_BAND_BASS, global_audio_mixer->get_eq(bus_index, EQ_BAND_BASS));
 434                 ui_audio_expanded_view->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 435                 ui->buses->addWidget(channel);
 436
 437                 ui_audio_expanded_view->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(bus_index));
 438                 connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 439                         global_audio_mixer->set_locut_enabled(bus_index, state == Qt::Checked);
 440                 });
 441
 442                 connect(ui_audio_expanded_view->treble_knob, &QDial::valueChanged,
 443                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_TREBLE, _1));
 444                 connect(ui_audio_expanded_view->mid_knob, &QDial::valueChanged,
 445                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_MID, _1));
 446                 connect(ui_audio_expanded_view->bass_knob, &QDial::valueChanged,
 447                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_BASS, _1));
 448
 449                 ui_audio_expanded_view->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(bus_index));
 450                 ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(bus_index));
 451                 ui_audio_expanded_view->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(bus_index));
 452
 453                 connect(ui_audio_expanded_view->gainstaging_knob, &QAbstractSlider::valueChanged, bind(&MainWindow::gain_staging_knob_changed, this, bus_index, _1));
 454                 connect(ui_audio_expanded_view->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, bus_index](int state){
 455                         global_audio_mixer->set_gain_staging_auto(bus_index, state == Qt::Checked);
 456                 });
 457
 458                 connect(ui_audio_expanded_view->compressor_threshold_knob, &QDial::valueChanged, bind(&MainWindow::compressor_threshold_knob_changed, this, bus_index, _1));
 459                 connect(ui_audio_expanded_view->compressor_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 460                         global_audio_mixer->set_compressor_enabled(bus_index, state == Qt::Checked);
 461                 });
 462
 463                 slave_fader(audio_miniviews[bus_index]->fader, ui_audio_expanded_view->fader);
 464
 465                 // Set up the peak meter.
 466                 VUMeter *peak_meter = ui_audio_expanded_view->peak_meter;
 467                 peak_meter->set_min_level(-30.0f);
 468                 peak_meter->set_max_level(0.0f);
 469                 peak_meter->set_ref_level(0.0f);
 470
 471                 connect(ui_audio_expanded_view->peak_display_label, &ClickableLabel::clicked,
 472                         [bus_index]() {
 473                                 global_audio_mixer->reset_peak(bus_index);
 474                         });
 475
 476                 // Set up the compression attenuation meter.
 477                 VUMeter *reduction_meter = ui_audio_expanded_view->reduction_meter;
 478                 reduction_meter->set_min_level(0.0f);
 479                 reduction_meter->set_max_level(10.0f);
 480                 reduction_meter->set_ref_level(0.0f);
 481                 reduction_meter->set_flip(true);
 482         }
 483
 484         update_cutoff_labels(global_audio_mixer->get_locut_cutoff());
 485 }
 486
 487 void MainWindow::mixer_shutting_down()
 488 {
 489         ui->me_live->clean_context();
 490         ui->me_preview->clean_context();
 491         for (Ui::Display *display : previews) {
 492                 display->display->clean_context();
 493         }
 494 }
 495
 496 void MainWindow::cut_triggered()
 497 {
 498         global_mixer->schedule_cut();
 499 }
 500
 501 void MainWindow::x264_bitrate_triggered()
 502 {
 503         bool ok;
 504         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);
 505         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 506                 global_flags.x264_bitrate = new_bitrate;
 507                 global_mixer->change_x264_bitrate(new_bitrate);
 508         }
 509 }
 510
 511 void MainWindow::exit_triggered()
 512 {
 513         close();
 514 }
 515
 516 void MainWindow::about_triggered()
 517 {
 518         AboutDialog().exec();
 519 }
 520
 521 void MainWindow::simple_audio_mode_triggered()
 522 {
 523         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 524                 return;
 525         }
 526         unsigned card_index = global_audio_mixer->get_simple_input();
 527         if (card_index == numeric_limits<unsigned>::max()) {
 528                 QMessageBox::StandardButton reply =
 529                         QMessageBox::question(this,
 530                                 "Mapping too complex",
 531                                 "The current audio mapping is too complicated to be representable in simple mode, "
 532                                         "and will be discarded if you proceed. Really go to simple audio mode?",
 533                                 QMessageBox::Yes | QMessageBox::No);
 534                 if (reply == QMessageBox::No) {
 535                         ui->simple_audio_mode->setChecked(false);
 536                         ui->multichannel_audio_mode->setChecked(true);
 537                         return;
 538                 }
 539                 card_index = 0;
 540         }
 541         global_audio_mixer->set_simple_input(/*card_index=*/card_index);
 542         reset_audio_mapping_ui();
 543 }
 544
 545 void MainWindow::multichannel_audio_mode_triggered()
 546 {
 547         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 548                 return;
 549         }
 550
 551         // Take the generated input mapping from the simple input,
 552         // and set it as a normal multichannel mapping, which causes
 553         // the mode to go to multichannel.
 554         global_audio_mixer->set_input_mapping(global_audio_mixer->get_input_mapping());
 555         reset_audio_mapping_ui();
 556 }
 557
 558 void MainWindow::input_mapping_triggered()
 559 {
 560         if (InputMappingDialog().exec() == QDialog::Accepted) {
 561                 setup_audio_miniview();
 562                 setup_audio_expanded_view();
 563         }
 564 }
 565
 566 void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
 567 {
 568         if (bus_index == 0) {
 569                 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 570         }
 571         if (bus_index < audio_expanded_views.size()) {
 572                 audio_expanded_views[bus_index]->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 573         }
 574
 575         float gain_db = value * 0.1f;
 576         global_audio_mixer->set_gain_staging_db(bus_index, gain_db);
 577
 578         // The label will be updated by the audio level callback.
 579 }
 580
 581 void MainWindow::final_makeup_gain_knob_changed(int value)
 582 {
 583         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 584
 585         float gain_db = value * 0.1f;
 586         global_audio_mixer->set_final_makeup_gain_db(gain_db);
 587
 588         // The label will be updated by the audio level callback.
 589 }
 590
 591 void MainWindow::cutoff_knob_changed(int value)
 592 {
 593         float octaves = value * 0.1f;
 594         float cutoff_hz = 20.0 * pow(2.0, octaves);
 595         global_audio_mixer->set_locut_cutoff(cutoff_hz);
 596         update_cutoff_labels(cutoff_hz);
 597 }
 598
 599 void MainWindow::update_cutoff_labels(float cutoff_hz)
 600 {
 601         char buf[256];
 602         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 603         ui->locut_cutoff_display->setText(buf);
 604         ui->locut_cutoff_display_2->setText(buf);
 605
 606         for (unsigned bus_index = 0; bus_index < audio_expanded_views.size(); ++bus_index) {
 607                 audio_expanded_views[bus_index]->locut_enabled->setText(
 608                         QString("Lo-cut: ") + buf);
 609         }
 610 }
 611
 612 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 613 {
 614         char time_str[256];
 615         if (estimated_seconds_left < 60.0) {
 616                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 617         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 618                 int s = lrintf(estimated_seconds_left);
 619                 int m = s / 60;
 620                 s %= 60;
 621                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 622         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 623                 int m = lrintf(estimated_seconds_left / 60.0);
 624                 snprintf(time_str, sizeof(time_str), "%dm", m);
 625         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 626                 int m = lrintf(estimated_seconds_left / 60.0);
 627                 int h = m / 60;
 628                 m %= 60;
 629                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 630         } else {  // More than ten hours: Xh.
 631                 int h = lrintf(estimated_seconds_left / 3600.0);
 632                 snprintf(time_str, sizeof(time_str), "%dh", h);
 633         }
 634         char buf[256];
 635         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 636
 637         std::string label = buf;
 638
 639         post_to_main_thread([this, label]{
 640                 disk_free_label->setText(QString::fromStdString(label));
 641                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 642         });
 643 }
 644
 645 void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
 646 {
 647         float gain_db = value * 0.1f;
 648         global_audio_mixer->set_eq(bus_index, band, gain_db);
 649
 650         update_eq_label(bus_index, band, gain_db);
 651 }
 652
 653 void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
 654 {
 655         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 656         string db_string = format_db(gain_db, DB_WITH_SIGN);
 657         switch (band) {
 658         case EQ_BAND_TREBLE:
 659                 view->treble_label->setText(QString::fromStdString("Treble: " + db_string));
 660                 break;
 661         case EQ_BAND_MID:
 662                 view->mid_label->setText(QString::fromStdString("Mid: " + db_string));
 663                 break;
 664         case EQ_BAND_BASS:
 665                 view->bass_label->setText(QString::fromStdString("Bass: " + db_string));
 666                 break;
 667         default:
 668                 assert(false);
 669         }
 670 }
 671
 672 void MainWindow::limiter_threshold_knob_changed(int value)
 673 {
 674         float threshold_dbfs = value * 0.1f;
 675         global_audio_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 676         ui->limiter_threshold_db_display->setText(
 677                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 678         ui->limiter_threshold_db_display_2->setText(
 679                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 680 }
 681
 682 void MainWindow::compressor_threshold_knob_changed(unsigned bus_index, int value)
 683 {
 684         float threshold_dbfs = value * 0.1f;
 685         global_audio_mixer->set_compressor_threshold_dbfs(bus_index, threshold_dbfs);
 686
 687         QString label(QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 688         if (bus_index == 0) {
 689                 ui->compressor_threshold_db_display->setText(label);
 690         }
 691         if (bus_index < audio_expanded_views.size()) {
 692                 audio_expanded_views[bus_index]->compressor_threshold_db_display->setText(label);
 693         }
 694 }
 695
 696 void MainWindow::mini_fader_changed(int bus, double volume_db)
 697 {
 698         QString label(QString::fromStdString(format_db(volume_db, DB_WITH_SIGN)));
 699         audio_miniviews[bus]->fader_label->setText(label);
 700         audio_expanded_views[bus]->fader_label->setText(label);
 701
 702         global_audio_mixer->set_fader_volume(bus, volume_db);
 703 }
 704
 705 void MainWindow::reset_meters_button_clicked()
 706 {
 707         global_audio_mixer->reset_meters();
 708         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
 709         ui->peak_display->setStyleSheet("");
 710 }
 711
 712 void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<AudioMixer::BusLevel> bus_levels,
 713                                       float global_level_lufs,
 714                                       float range_low_lufs, float range_high_lufs,
 715                                       float final_makeup_gain_db,
 716                                       float correlation)
 717 {
 718         steady_clock::time_point now = steady_clock::now();
 719
 720         // The meters are somewhat inefficient to update. Only update them
 721         // every 100 ms or so (we get updates every 5–20 ms). Note that this
 722         // means that the digital peak meters are ever so slightly too low
 723         // (each update won't be a faithful representation of the highest peak
 724         // since the previous update, since there are frames we won't draw),
 725         // but the _peak_ of the peak meters will be correct (it's tracked in
 726         // AudioMixer, not here), and that's much more important.
 727         double last_update_age = duration<double>(now - last_audio_level_callback).count();
 728         if (last_update_age < 0.100) {
 729                 return;
 730         }
 731         last_audio_level_callback = now;
 732
 733         post_to_main_thread([=]() {
 734                 ui->vu_meter->set_level(level_lufs);
 735                 for (unsigned bus_index = 0; bus_index < bus_levels.size(); ++bus_index) {
 736                         if (bus_index < audio_miniviews.size()) {
 737                                 const AudioMixer::BusLevel &level = bus_levels[bus_index];
 738                                 Ui::AudioMiniView *miniview = audio_miniviews[bus_index];
 739                                 miniview->peak_meter->set_level(
 740                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 741                                 miniview->peak_meter->set_peak(
 742                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 743                                 set_peak_label(miniview->peak_display_label, level.historic_peak_dbfs);
 744
 745                                 Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 746                                 view->peak_meter->set_level(
 747                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 748                                 view->peak_meter->set_peak(
 749                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 750                                 view->reduction_meter->set_level(level.compressor_attenuation_db);
 751                                 view->gainstaging_knob->blockSignals(true);
 752                                 view->gainstaging_knob->setValue(lrintf(level.gain_staging_db * 10.0f));
 753                                 view->gainstaging_knob->blockSignals(false);
 754                                 view->gainstaging_db_display->setText(
 755                                         QString("Gain: ") +
 756                                         QString::fromStdString(format_db(level.gain_staging_db, DB_WITH_SIGN)));
 757                                 set_peak_label(view->peak_display_label, level.historic_peak_dbfs);
 758                         }
 759                 }
 760                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 761                 ui->correlation_meter->set_correlation(correlation);
 762
 763                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 764                 set_peak_label(ui->peak_display, peak_db);
 765
 766                 // NOTE: Will be invisible when using multitrack audio.
 767                 ui->gainstaging_knob->blockSignals(true);
 768                 ui->gainstaging_knob->setValue(lrintf(bus_levels[0].gain_staging_db * 10.0f));
 769                 ui->gainstaging_knob->blockSignals(false);
 770                 ui->gainstaging_db_display->setText(
 771                         QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
 772
 773                 ui->makeup_gain_knob->blockSignals(true);
 774                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 775                 ui->makeup_gain_knob->blockSignals(false);
 776                 ui->makeup_gain_db_display->setText(
 777                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 778                 ui->makeup_gain_db_display_2->setText(
 779                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 780         });
 781 }
 782
 783 void MainWindow::relayout()
 784 {
 785         int height = ui->vertical_layout->geometry().height();
 786
 787         double remaining_height = height;
 788
 789         // Allocate the height; the most important part is to keep the main displays
 790         // at 16:9 if at all possible.
 791         double me_width = ui->me_preview->width();
 792         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 793
 794         // TODO: Scale the widths when we need to do this.
 795         if (me_height / double(height) > 0.8) {
 796                 me_height = height * 0.8;
 797         }
 798         remaining_height -= me_height + ui->vertical_layout->spacing();
 799
 800         // Space between the M/E displays and the audio strip.
 801         remaining_height -= ui->vertical_layout->spacing();
 802
 803         // The label above the audio strip.
 804         double compact_label_height = ui->compact_label->minimumHeight() +
 805                 ui->compact_audio_layout->spacing();
 806         remaining_height -= compact_label_height;
 807
 808         // The previews will be constrained by the remaining height, and the width.
 809         double preview_label_height = previews[0]->title_bar->geometry().height() +
 810                 previews[0]->main_vertical_layout->spacing();
 811         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 812         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 813         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 814
 815         ui->vertical_layout->setStretch(0, lrintf(me_height));
 816         ui->vertical_layout->setStretch(1,
 817                 lrintf(compact_label_height) +
 818                 lrintf(remaining_height) +
 819                 lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
 820
 821         ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
 822         ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
 823         ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
 824
 825         // Set the widths for the previews.
 826         double preview_width = preview_height * 16.0 / 9.0;
 827         for (unsigned i = 0; i < previews.size(); ++i) {
 828                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 829         }
 830
 831         // The preview horizontal spacer.
 832         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 833         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 834 }
 835
 836 void MainWindow::set_locut(float value)
 837 {
 838         set_relative_value(ui->locut_cutoff_knob, value);
 839 }
 840
 841 void MainWindow::set_limiter_threshold(float value)
 842 {
 843         set_relative_value(ui->limiter_threshold_knob, value);
 844 }
 845
 846 void MainWindow::set_makeup_gain(float value)
 847 {
 848         set_relative_value(ui->makeup_gain_knob, value);
 849 }
 850
 851 void MainWindow::set_treble(unsigned bus_idx, float value)
 852 {
 853         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, value);
 854 }
 855
 856 void MainWindow::set_mid(unsigned bus_idx, float value)
 857 {
 858         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, value);
 859 }
 860
 861 void MainWindow::set_bass(unsigned bus_idx, float value)
 862 {
 863         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, value);
 864 }
 865
 866 void MainWindow::set_gain(unsigned bus_idx, float value)
 867 {
 868         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, value);
 869 }
 870
 871 void MainWindow::set_compressor_threshold(unsigned bus_idx, float value)
 872 {
 873         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, value);
 874 }
 875
 876 void MainWindow::set_fader(unsigned bus_idx, float value)
 877 {
 878         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::fader, value);
 879 }
 880
 881 void MainWindow::toggle_locut(unsigned bus_idx)
 882 {
 883         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled);
 884 }
 885
 886 void MainWindow::toggle_auto_gain_staging(unsigned bus_idx)
 887 {
 888         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox);
 889 }
 890
 891 void MainWindow::toggle_compressor(unsigned bus_idx)
 892 {
 893         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled);
 894 }
 895
 896 void MainWindow::clear_peak(unsigned bus_idx)
 897 {
 898         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 899                 global_audio_mixer->reset_peak(bus_idx);
 900         }
 901 }
 902
 903 template<class T>
 904 void MainWindow::set_relative_value(T *control, float value)
 905 {
 906         post_to_main_thread([control, value]{
 907                 control->setValue(lrintf(control->minimum() + value * (control->maximum() - control->minimum())));
 908         });
 909 }
 910
 911 template<class T>
 912 void MainWindow::set_relative_value_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), float value)
 913 {
 914         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
 915             bus_idx < audio_expanded_views.size()) {
 916                 set_relative_value(audio_expanded_views[bus_idx]->*control, value);
 917         }
 918 }
 919
 920 template<class T>
 921 void MainWindow::click_button_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control))
 922 {
 923         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
 924             bus_idx < audio_expanded_views.size()) {
 925                 (audio_expanded_views[bus_idx]->*control)->click();
 926         }
 927 }
 928
 929 void MainWindow::set_transition_names(vector<string> transition_names)
 930 {
 931         if (transition_names.size() < 1 || transition_names[0].empty()) {
 932                 transition_btn1->setText(QString(""));
 933         } else {
 934                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
 935                 ui->transition_btn1->setShortcut(QKeySequence("J"));
 936         }
 937         if (transition_names.size() < 2 || transition_names[1].empty()) {
 938                 transition_btn2->setText(QString(""));
 939         } else {
 940                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
 941                 ui->transition_btn2->setShortcut(QKeySequence("K"));
 942         }
 943         if (transition_names.size() < 3 || transition_names[2].empty()) {
 944                 transition_btn3->setText(QString(""));
 945         } else {
 946                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
 947                 ui->transition_btn3->setShortcut(QKeySequence("L"));
 948         }
 949 }
 950
 951 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
 952 {
 953         if (output >= Mixer::OUTPUT_INPUT0) {
 954                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 955                 previews[channel]->label->setText(name.c_str());
 956         }
 957 }
 958
 959 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
 960 {
 961         if (output >= Mixer::OUTPUT_INPUT0) {
 962                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 963                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
 964         }
 965 }
 966
 967 void MainWindow::transition_clicked(int transition_number)
 968 {
 969         global_mixer->transition_clicked(transition_number);
 970 }
 971
 972 void MainWindow::channel_clicked(int channel_number)
 973 {
 974         if (current_wb_pick_display == channel_number) {
 975                 // The picking was already done from eventFilter(), since we don't get
 976                 // the mouse pointer here.
 977         } else {
 978                 global_mixer->channel_clicked(channel_number);
 979         }
 980 }
 981
 982 void MainWindow::wb_button_clicked(int channel_number)
 983 {
 984         current_wb_pick_display = channel_number;
 985         QApplication::setOverrideCursor(Qt::CrossCursor);
 986 }
 987
 988 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 989 {
 990         if (current_wb_pick_display != -1 &&
 991             event->type() == QEvent::MouseButtonRelease &&
 992             watched->isWidgetType()) {
 993                 QApplication::restoreOverrideCursor();
 994                 if (watched == previews[current_wb_pick_display]->display) {
 995                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 996                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 997                 } else {
 998                         // The user clicked on something else, give up.
 999                         // (The click goes through, which might not be ideal, but, yes.)
1000                         current_wb_pick_display = -1;
1001                 }
1002         }
1003         return false;
1004 }
1005
1006 namespace {
1007
1008 double srgb_to_linear(double x)
1009 {
1010         if (x < 0.04045) {
1011                 return x / 12.92;
1012         } else {
1013                 return pow((x + 0.055) / 1.055, 2.4);
1014         }
1015 }
1016
1017 }  // namespace
1018
1019 void MainWindow::set_white_balance(int channel_number, int x, int y)
1020 {
1021         // Set the white balance to neutral for the grab. It's probably going to
1022         // flicker a bit, but hopefully this display is not live anyway.
1023         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
1024         previews[channel_number]->display->updateGL();
1025         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
1026
1027         double r = srgb_to_linear(qRed(reference_color) / 255.0);
1028         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
1029         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
1030         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
1031         previews[channel_number]->display->updateGL();
1032 }
1033
1034 void MainWindow::audio_state_changed()
1035 {
1036         post_to_main_thread([this]{
1037                 InputMapping mapping = global_audio_mixer->get_input_mapping();
1038                 for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
1039                         const InputMapping::Bus &bus = mapping.buses[bus_index];
1040                         string suffix;
1041                         if (bus.device.type == InputSourceType::ALSA_INPUT) {
1042                                 ALSAPool::Device::State state = global_audio_mixer->get_alsa_card_state(bus.device.index);
1043                                 if (state == ALSAPool::Device::State::STARTING) {
1044                                         suffix = " (busy)";
1045                                 } else if (state == ALSAPool::Device::State::DEAD) {
1046                                         suffix = " (dead)";
1047                                 }
1048                         }
1049
1050                         audio_miniviews[bus_index]->bus_desc_label->setFullText(
1051                                 QString::fromStdString(bus.name + suffix));
1052                         audio_expanded_views[bus_index]->bus_desc_label->setFullText(
1053                                 QString::fromStdString(bus.name + suffix));
1054                 }
1055         });
1056 }