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 "midi_mapping_dialog.h"
  30 #include "mixer.h"
  31 #include "post_to_main_thread.h"
  32 #include "ui_audio_miniview.h"
  33 #include "ui_audio_expanded_view.h"
  34 #include "ui_display.h"
  35 #include "ui_mainwindow.h"
  36 #include "vumeter.h"
  37
  38 class QResizeEvent;
  39
  40 using namespace std;
  41 using namespace std::chrono;
  42 using namespace std::placeholders;
  43
  44 Q_DECLARE_METATYPE(std::string);
  45 Q_DECLARE_METATYPE(std::vector<std::string>);
  46
  47 MainWindow *global_mainwindow = nullptr;
  48
  49 // -0.1 dBFS is EBU peak limit. We use it consistently, even for the bus meters
  50 // (which don't calculate interpolate peak, and in general don't follow EBU recommendations).
  51 constexpr float peak_limit_dbfs = -0.1f;
  52
  53 namespace {
  54
  55 void schedule_cut_signal(int ignored)
  56 {
  57         global_mixer->schedule_cut();
  58 }
  59
  60 void quit_signal(int ignored)
  61 {
  62         global_mainwindow->close();
  63 }
  64
  65 void slave_knob(QDial *master, QDial *slave)
  66 {
  67         QWidget::connect(master, &QDial::valueChanged, [slave](int value){
  68                 slave->blockSignals(true);
  69                 slave->setValue(value);
  70                 slave->blockSignals(false);
  71         });
  72         QWidget::connect(slave, &QDial::valueChanged, [master](int value){
  73                 master->setValue(value);
  74         });
  75 }
  76
  77 void slave_checkbox(QCheckBox *master, QCheckBox *slave)
  78 {
  79         QWidget::connect(master, &QCheckBox::stateChanged, [slave](int state){
  80                 slave->blockSignals(true);
  81                 slave->setCheckState(Qt::CheckState(state));
  82                 slave->blockSignals(false);
  83         });
  84         QWidget::connect(slave, &QCheckBox::stateChanged, [master](int state){
  85                 master->setCheckState(Qt::CheckState(state));
  86         });
  87 }
  88
  89 void slave_fader(NonLinearFader *master, NonLinearFader *slave)
  90 {
  91         QWidget::connect(master, &NonLinearFader::dbValueChanged, [slave](double value) {
  92                 slave->blockSignals(true);
  93                 slave->setDbValue(value);
  94                 slave->blockSignals(false);
  95         });
  96         QWidget::connect(slave, &NonLinearFader::dbValueChanged, [master](double value){
  97                 master->setDbValue(value);
  98         });
  99 }
 100
 101 constexpr unsigned DB_NO_FLAGS = 0x0;
 102 constexpr unsigned DB_WITH_SIGN = 0x1;
 103 constexpr unsigned DB_BARE = 0x2;
 104
 105 string format_db(double db, unsigned flags)
 106 {
 107         string text;
 108         if (flags & DB_WITH_SIGN) {
 109                 if (isfinite(db)) {
 110                         char buf[256];
 111                         snprintf(buf, sizeof(buf), "%+.1f", db);
 112                         text = buf;
 113                 } else if (db < 0.0) {
 114                         text = "-∞";
 115                 } else {
 116                         // Should never happen, really.
 117                         text = "+∞";
 118                 }
 119         } else {
 120                 if (isfinite(db)) {
 121                         char buf[256];
 122                         snprintf(buf, sizeof(buf), "%.1f", db);
 123                         text = buf;
 124                 } else if (db < 0.0) {
 125                         text = "-∞";
 126                 } else {
 127                         // Should never happen, really.
 128                         text = "∞";
 129                 }
 130         }
 131         if (!(flags & DB_BARE)) {
 132                 text += " dB";
 133         }
 134         return text;
 135 }
 136
 137 void set_peak_label(QLabel *peak_label, float peak_db)
 138 {
 139         peak_label->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 140
 141         if (peak_db > peak_limit_dbfs) {
 142                 peak_label->setStyleSheet("QLabel { background-color: red; color: white; }");
 143         } else {
 144                 peak_label->setStyleSheet("");
 145         }
 146 }
 147
 148 }  // namespace
 149
 150 MainWindow::MainWindow()
 151         : ui(new Ui::MainWindow), midi_mapper(this)
 152 {
 153         global_mainwindow = this;
 154         ui->setupUi(this);
 155
 156         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 157         disk_free_label = new QLabel(this);
 158         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 159         ui->menuBar->setCornerWidget(disk_free_label);
 160
 161         QActionGroup *audio_mapping_group = new QActionGroup(this);
 162         ui->simple_audio_mode->setActionGroup(audio_mapping_group);
 163         ui->multichannel_audio_mode->setActionGroup(audio_mapping_group);
 164
 165         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
 166         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
 167
 168         // The menus.
 169         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
 170         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
 171         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
 172         connect(ui->simple_audio_mode, &QAction::triggered, this, &MainWindow::simple_audio_mode_triggered);
 173         connect(ui->multichannel_audio_mode, &QAction::triggered, this, &MainWindow::multichannel_audio_mode_triggered);
 174         connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
 175         connect(ui->midi_mapping_action, &QAction::triggered, this, &MainWindow::midi_mapping_triggered);
 176
 177         if (global_flags.x264_video_to_http) {
 178                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
 179         } else {
 180                 ui->x264_bitrate_action->setEnabled(false);
 181         }
 182
 183         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 184         // TODO: Make them dynamic.
 185         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
 186         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
 187         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 188
 189         // Aiee...
 190         transition_btn1 = ui->transition_btn1;
 191         transition_btn2 = ui->transition_btn2;
 192         transition_btn3 = ui->transition_btn3;
 193         qRegisterMetaType<string>("std::string");
 194         qRegisterMetaType<vector<string>>("std::vector<std::string>");
 195         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 196         qRegisterMetaType<Mixer::Output>("Mixer::Output");
 197
 198         // Hook up the prev/next buttons on the audio views.
 199         connect(ui->compact_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 200         connect(ui->compact_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 201         connect(ui->full_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 202         connect(ui->full_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 203
 204         // And bind the same to PgUp/PgDown.
 205         auto switch_page = [this]{
 206                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 207                         ui->audio_views->setCurrentIndex(1 - ui->audio_views->currentIndex());
 208                 }
 209         };
 210         connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, switch_page);
 211         connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, switch_page);
 212
 213         last_audio_level_callback = steady_clock::now() - seconds(1);
 214
 215         if (!global_flags.midi_mapping_filename.empty()) {
 216                 MIDIMappingProto midi_mapping;
 217                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 218                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 219                                 global_flags.midi_mapping_filename.c_str());
 220                         exit(1);
 221                 }
 222                 midi_mapper.set_midi_mapping(midi_mapping);
 223         }
 224         midi_mapper.start_thread();
 225 }
 226
 227 void MainWindow::resizeEvent(QResizeEvent* event)
 228 {
 229         QMainWindow::resizeEvent(event);
 230
 231         // Ask for a relayout, but only after the event loop is done doing relayout
 232         // on everything else.
 233         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 234 }
 235
 236 void MainWindow::mixer_created(Mixer *mixer)
 237 {
 238         // Make the previews.
 239         unsigned num_previews = mixer->get_num_channels();
 240
 241         for (unsigned i = 0; i < num_previews; ++i) {
 242                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 243
 244                 QWidget *preview = new QWidget(this);
 245                 Ui::Display *ui_display = new Ui::Display;
 246                 ui_display->setupUi(preview);
 247                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 248                 ui_display->display->set_output(output);
 249                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
 250                 previews.push_back(ui_display);
 251
 252                 // Hook up the click.
 253                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 254
 255                 // Let the theme update the text whenever the resolution or color changed.
 256                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 257                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 258
 259                 // Hook up the keyboard key.
 260                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 261                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 262
 263                 // Hook up the white balance button (irrelevant if invisible).
 264                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 265                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 266         }
 267
 268         global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
 269
 270         slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
 271         slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
 272         slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
 273         slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
 274         slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
 275
 276         reset_audio_mapping_ui();
 277
 278         // TODO: Fetch all of the values these for completeness,
 279         // not just the enable knobs implied by flags.
 280         ui->limiter_enabled->setChecked(global_audio_mixer->get_limiter_enabled());
 281         ui->makeup_gain_auto_checkbox->setChecked(global_audio_mixer->get_final_makeup_gain_auto());
 282
 283         // Controls used only for simple audio fetch their state from the first bus.
 284         constexpr unsigned simple_bus_index = 0;
 285         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 286                 ui->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(simple_bus_index));
 287                 ui->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(simple_bus_index));
 288                 ui->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(simple_bus_index));
 289                 ui->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(simple_bus_index));
 290                 ui->compressor_threshold_db_display->setText(
 291                         QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(simple_bus_index), DB_WITH_SIGN)));
 292         }
 293         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 294                 global_audio_mixer->set_locut_enabled(simple_bus_index, state == Qt::Checked);
 295                 midi_mapper.refresh_lights();
 296         });
 297         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged,
 298                 bind(&MainWindow::gain_staging_knob_changed, this, simple_bus_index, _1));
 299         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 300                 global_audio_mixer->set_gain_staging_auto(simple_bus_index, state == Qt::Checked);
 301                 midi_mapper.refresh_lights();
 302         });
 303         connect(ui->compressor_threshold_knob, &QDial::valueChanged,
 304                 bind(&MainWindow::compressor_threshold_knob_changed, this, simple_bus_index, _1));
 305         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 306                 global_audio_mixer->set_compressor_enabled(simple_bus_index, state == Qt::Checked);
 307                 midi_mapper.refresh_lights();
 308         });
 309
 310         // Global mastering controls.
 311         QString limiter_threshold_label(
 312                 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
 313         ui->limiter_threshold_db_display->setText(limiter_threshold_label);
 314         ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
 315
 316         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 317         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 318
 319         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 320         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 321                 global_audio_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 322                 midi_mapper.refresh_lights();
 323         });
 324
 325         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 326         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 327                 global_audio_mixer->set_limiter_enabled(state == Qt::Checked);
 328                 midi_mapper.refresh_lights();
 329         });
 330         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 331         // Even though we have a reset button right next to it, the fact that
 332         // the expanded audio view labels are clickable makes it natural to
 333         // click this one as well.
 334         connect(ui->peak_display, &ClickableLabel::clicked, this, &MainWindow::reset_meters_button_clicked);
 335         mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 336
 337         midi_mapper.refresh_highlights();
 338         midi_mapper.refresh_lights();
 339
 340         struct sigaction act;
 341         memset(&act, 0, sizeof(act));
 342         act.sa_handler = schedule_cut_signal;
 343         act.sa_flags = SA_RESTART;
 344         sigaction(SIGHUP, &act, nullptr);
 345
 346         // Mostly for debugging. Don't override SIGINT, that's so evil if
 347         // shutdown isn't instant.
 348         memset(&act, 0, sizeof(act));
 349         act.sa_handler = quit_signal;
 350         act.sa_flags = SA_RESTART;
 351         sigaction(SIGUSR1, &act, nullptr);
 352 }
 353
 354 void MainWindow::reset_audio_mapping_ui()
 355 {
 356         bool simple = (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE);
 357
 358         ui->simple_audio_mode->setChecked(simple);
 359         ui->multichannel_audio_mode->setChecked(!simple);
 360         ui->input_mapping_action->setEnabled(!simple);
 361         ui->midi_mapping_action->setEnabled(!simple);
 362
 363         ui->locut_enabled->setVisible(simple);
 364         ui->gainstaging_label->setVisible(simple);
 365         ui->gainstaging_knob->setVisible(simple);
 366         ui->gainstaging_db_display->setVisible(simple);
 367         ui->gainstaging_auto_checkbox->setVisible(simple);
 368         ui->compressor_threshold_label->setVisible(simple);
 369         ui->compressor_threshold_knob->setVisible(simple);
 370         ui->compressor_threshold_db_display->setVisible(simple);
 371         ui->compressor_enabled->setVisible(simple);
 372
 373         setup_audio_miniview();
 374         setup_audio_expanded_view();
 375
 376         if (simple) {
 377                 ui->audio_views->setCurrentIndex(0);
 378         }
 379         ui->compact_header->setVisible(!simple);
 380
 381         midi_mapper.refresh_highlights();
 382         midi_mapper.refresh_lights();
 383 }
 384
 385 void MainWindow::setup_audio_miniview()
 386 {
 387         // Remove any existing channels.
 388         for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
 389                 delete item->widget();
 390                 delete item;
 391         }
 392         audio_miniviews.clear();
 393
 394         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 395                 return;
 396         }
 397
 398         // Set up brand new ones from the input mapping.
 399         InputMapping mapping = global_audio_mixer->get_input_mapping();
 400         audio_miniviews.resize(mapping.buses.size());
 401         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 402                 QWidget *channel = new QWidget(this);
 403                 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
 404                 ui_audio_miniview->setupUi(channel);
 405                 ui_audio_miniview->bus_desc_label->setFullText(
 406                         QString::fromStdString(mapping.buses[bus_index].name));
 407                 audio_miniviews[bus_index] = ui_audio_miniview;
 408
 409                 // Set up the peak meter.
 410                 VUMeter *peak_meter = ui_audio_miniview->peak_meter;
 411                 peak_meter->set_min_level(-30.0f);
 412                 peak_meter->set_max_level(0.0f);
 413                 peak_meter->set_ref_level(0.0f);
 414
 415                 ui_audio_miniview->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 416
 417                 ui->faders->addWidget(channel);
 418
 419                 connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
 420                         bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
 421                 connect(ui_audio_miniview->peak_display_label, &ClickableLabel::clicked,
 422                         [bus_index]() {
 423                                 global_audio_mixer->reset_peak(bus_index);
 424                         });
 425         }
 426 }
 427
 428 void MainWindow::setup_audio_expanded_view()
 429 {
 430         // Remove any existing channels.
 431         for (QLayoutItem *item; (item = ui->buses->takeAt(0)) != nullptr; ) {
 432                 delete item->widget();
 433                 delete item;
 434         }
 435         audio_expanded_views.clear();
 436
 437         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 438                 return;
 439         }
 440
 441         // Set up brand new ones from the input mapping.
 442         InputMapping mapping = global_audio_mixer->get_input_mapping();
 443         audio_expanded_views.resize(mapping.buses.size());
 444         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 445                 QWidget *channel = new QWidget(this);
 446                 Ui::AudioExpandedView *ui_audio_expanded_view = new Ui::AudioExpandedView;
 447                 ui_audio_expanded_view->setupUi(channel);
 448                 ui_audio_expanded_view->bus_desc_label->setFullText(
 449                         QString::fromStdString(mapping.buses[bus_index].name));
 450                 audio_expanded_views[bus_index] = ui_audio_expanded_view;
 451                 update_eq_label(bus_index, EQ_BAND_TREBLE, global_audio_mixer->get_eq(bus_index, EQ_BAND_TREBLE));
 452                 update_eq_label(bus_index, EQ_BAND_MID, global_audio_mixer->get_eq(bus_index, EQ_BAND_MID));
 453                 update_eq_label(bus_index, EQ_BAND_BASS, global_audio_mixer->get_eq(bus_index, EQ_BAND_BASS));
 454                 ui_audio_expanded_view->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 455                 ui->buses->addWidget(channel);
 456
 457                 ui_audio_expanded_view->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(bus_index));
 458                 connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 459                         global_audio_mixer->set_locut_enabled(bus_index, state == Qt::Checked);
 460                         midi_mapper.refresh_lights();
 461                 });
 462
 463                 connect(ui_audio_expanded_view->treble_knob, &QDial::valueChanged,
 464                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_TREBLE, _1));
 465                 connect(ui_audio_expanded_view->mid_knob, &QDial::valueChanged,
 466                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_MID, _1));
 467                 connect(ui_audio_expanded_view->bass_knob, &QDial::valueChanged,
 468                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_BASS, _1));
 469
 470                 ui_audio_expanded_view->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(bus_index));
 471                 ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(bus_index));
 472                 ui_audio_expanded_view->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(bus_index));
 473
 474                 connect(ui_audio_expanded_view->gainstaging_knob, &QAbstractSlider::valueChanged, bind(&MainWindow::gain_staging_knob_changed, this, bus_index, _1));
 475                 connect(ui_audio_expanded_view->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, bus_index](int state){
 476                         global_audio_mixer->set_gain_staging_auto(bus_index, state == Qt::Checked);
 477                         midi_mapper.refresh_lights();
 478                 });
 479
 480                 connect(ui_audio_expanded_view->compressor_threshold_knob, &QDial::valueChanged, bind(&MainWindow::compressor_threshold_knob_changed, this, bus_index, _1));
 481                 connect(ui_audio_expanded_view->compressor_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 482                         global_audio_mixer->set_compressor_enabled(bus_index, state == Qt::Checked);
 483                         midi_mapper.refresh_lights();
 484                 });
 485
 486                 slave_fader(audio_miniviews[bus_index]->fader, ui_audio_expanded_view->fader);
 487
 488                 // Set up the peak meter.
 489                 VUMeter *peak_meter = ui_audio_expanded_view->peak_meter;
 490                 peak_meter->set_min_level(-30.0f);
 491                 peak_meter->set_max_level(0.0f);
 492                 peak_meter->set_ref_level(0.0f);
 493
 494                 connect(ui_audio_expanded_view->peak_display_label, &ClickableLabel::clicked,
 495                         [this, bus_index]() {
 496                                 global_audio_mixer->reset_peak(bus_index);
 497                                 midi_mapper.refresh_lights();
 498                         });
 499
 500                 // Set up the compression attenuation meter.
 501                 VUMeter *reduction_meter = ui_audio_expanded_view->reduction_meter;
 502                 reduction_meter->set_min_level(0.0f);
 503                 reduction_meter->set_max_level(10.0f);
 504                 reduction_meter->set_ref_level(0.0f);
 505                 reduction_meter->set_flip(true);
 506         }
 507
 508         update_cutoff_labels(global_audio_mixer->get_locut_cutoff());
 509 }
 510
 511 void MainWindow::mixer_shutting_down()
 512 {
 513         ui->me_live->clean_context();
 514         ui->me_preview->clean_context();
 515         for (Ui::Display *display : previews) {
 516                 display->display->clean_context();
 517         }
 518 }
 519
 520 void MainWindow::cut_triggered()
 521 {
 522         global_mixer->schedule_cut();
 523 }
 524
 525 void MainWindow::x264_bitrate_triggered()
 526 {
 527         bool ok;
 528         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);
 529         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 530                 global_flags.x264_bitrate = new_bitrate;
 531                 global_mixer->change_x264_bitrate(new_bitrate);
 532         }
 533 }
 534
 535 void MainWindow::exit_triggered()
 536 {
 537         close();
 538 }
 539
 540 void MainWindow::about_triggered()
 541 {
 542         AboutDialog().exec();
 543 }
 544
 545 void MainWindow::simple_audio_mode_triggered()
 546 {
 547         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 548                 return;
 549         }
 550         unsigned card_index = global_audio_mixer->get_simple_input();
 551         if (card_index == numeric_limits<unsigned>::max()) {
 552                 QMessageBox::StandardButton reply =
 553                         QMessageBox::question(this,
 554                                 "Mapping too complex",
 555                                 "The current audio mapping is too complicated to be representable in simple mode, "
 556                                         "and will be discarded if you proceed. Really go to simple audio mode?",
 557                                 QMessageBox::Yes | QMessageBox::No);
 558                 if (reply == QMessageBox::No) {
 559                         ui->simple_audio_mode->setChecked(false);
 560                         ui->multichannel_audio_mode->setChecked(true);
 561                         return;
 562                 }
 563                 card_index = 0;
 564         }
 565         global_audio_mixer->set_simple_input(/*card_index=*/card_index);
 566         reset_audio_mapping_ui();
 567 }
 568
 569 void MainWindow::multichannel_audio_mode_triggered()
 570 {
 571         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 572                 return;
 573         }
 574
 575         // Take the generated input mapping from the simple input,
 576         // and set it as a normal multichannel mapping, which causes
 577         // the mode to go to multichannel.
 578         global_audio_mixer->set_input_mapping(global_audio_mixer->get_input_mapping());
 579         reset_audio_mapping_ui();
 580 }
 581
 582 void MainWindow::input_mapping_triggered()
 583 {
 584         if (InputMappingDialog().exec() == QDialog::Accepted) {
 585                 setup_audio_miniview();
 586                 setup_audio_expanded_view();
 587         }
 588         midi_mapper.refresh_highlights();
 589         midi_mapper.refresh_lights();
 590 }
 591
 592 void MainWindow::midi_mapping_triggered()
 593 {
 594         MIDIMappingDialog(&midi_mapper).exec();
 595 }
 596
 597 void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
 598 {
 599         if (bus_index == 0) {
 600                 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 601         }
 602         if (bus_index < audio_expanded_views.size()) {
 603                 audio_expanded_views[bus_index]->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 604         }
 605
 606         float gain_db = value * 0.1f;
 607         global_audio_mixer->set_gain_staging_db(bus_index, gain_db);
 608
 609         // The label will be updated by the audio level callback.
 610 }
 611
 612 void MainWindow::final_makeup_gain_knob_changed(int value)
 613 {
 614         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 615
 616         float gain_db = value * 0.1f;
 617         global_audio_mixer->set_final_makeup_gain_db(gain_db);
 618
 619         // The label will be updated by the audio level callback.
 620 }
 621
 622 void MainWindow::cutoff_knob_changed(int value)
 623 {
 624         float octaves = value * 0.1f;
 625         float cutoff_hz = 20.0 * pow(2.0, octaves);
 626         global_audio_mixer->set_locut_cutoff(cutoff_hz);
 627         update_cutoff_labels(cutoff_hz);
 628 }
 629
 630 void MainWindow::update_cutoff_labels(float cutoff_hz)
 631 {
 632         char buf[256];
 633         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 634         ui->locut_cutoff_display->setText(buf);
 635         ui->locut_cutoff_display_2->setText(buf);
 636
 637         for (unsigned bus_index = 0; bus_index < audio_expanded_views.size(); ++bus_index) {
 638                 audio_expanded_views[bus_index]->locut_enabled->setText(
 639                         QString("Lo-cut: ") + buf);
 640         }
 641 }
 642
 643 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 644 {
 645         char time_str[256];
 646         if (estimated_seconds_left < 60.0) {
 647                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 648         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 649                 int s = lrintf(estimated_seconds_left);
 650                 int m = s / 60;
 651                 s %= 60;
 652                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 653         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 654                 int m = lrintf(estimated_seconds_left / 60.0);
 655                 snprintf(time_str, sizeof(time_str), "%dm", m);
 656         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 657                 int m = lrintf(estimated_seconds_left / 60.0);
 658                 int h = m / 60;
 659                 m %= 60;
 660                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 661         } else {  // More than ten hours: Xh.
 662                 int h = lrintf(estimated_seconds_left / 3600.0);
 663                 snprintf(time_str, sizeof(time_str), "%dh", h);
 664         }
 665         char buf[256];
 666         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 667
 668         std::string label = buf;
 669
 670         post_to_main_thread([this, label]{
 671                 disk_free_label->setText(QString::fromStdString(label));
 672                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 673         });
 674 }
 675
 676 void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
 677 {
 678         float gain_db = value * 0.1f;
 679         global_audio_mixer->set_eq(bus_index, band, gain_db);
 680
 681         update_eq_label(bus_index, band, gain_db);
 682 }
 683
 684 void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
 685 {
 686         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 687         string db_string = format_db(gain_db, DB_WITH_SIGN);
 688         switch (band) {
 689         case EQ_BAND_TREBLE:
 690                 view->treble_label->setText(QString::fromStdString("Treble: " + db_string));
 691                 break;
 692         case EQ_BAND_MID:
 693                 view->mid_label->setText(QString::fromStdString("Mid: " + db_string));
 694                 break;
 695         case EQ_BAND_BASS:
 696                 view->bass_label->setText(QString::fromStdString("Bass: " + db_string));
 697                 break;
 698         default:
 699                 assert(false);
 700         }
 701 }
 702
 703 void MainWindow::limiter_threshold_knob_changed(int value)
 704 {
 705         float threshold_dbfs = value * 0.1f;
 706         global_audio_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 707         ui->limiter_threshold_db_display->setText(
 708                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 709         ui->limiter_threshold_db_display_2->setText(
 710                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 711 }
 712
 713 void MainWindow::compressor_threshold_knob_changed(unsigned bus_index, int value)
 714 {
 715         float threshold_dbfs = value * 0.1f;
 716         global_audio_mixer->set_compressor_threshold_dbfs(bus_index, threshold_dbfs);
 717
 718         QString label(QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 719         if (bus_index == 0) {
 720                 ui->compressor_threshold_db_display->setText(label);
 721         }
 722         if (bus_index < audio_expanded_views.size()) {
 723                 audio_expanded_views[bus_index]->compressor_threshold_db_display->setText(label);
 724         }
 725 }
 726
 727 void MainWindow::mini_fader_changed(int bus, double volume_db)
 728 {
 729         QString label(QString::fromStdString(format_db(volume_db, DB_WITH_SIGN)));
 730         audio_miniviews[bus]->fader_label->setText(label);
 731         audio_expanded_views[bus]->fader_label->setText(label);
 732
 733         global_audio_mixer->set_fader_volume(bus, volume_db);
 734 }
 735
 736 void MainWindow::reset_meters_button_clicked()
 737 {
 738         global_audio_mixer->reset_meters();
 739         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
 740         ui->peak_display->setStyleSheet("");
 741 }
 742
 743 void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<AudioMixer::BusLevel> bus_levels,
 744                                       float global_level_lufs,
 745                                       float range_low_lufs, float range_high_lufs,
 746                                       float final_makeup_gain_db,
 747                                       float correlation)
 748 {
 749         steady_clock::time_point now = steady_clock::now();
 750
 751         // The meters are somewhat inefficient to update. Only update them
 752         // every 100 ms or so (we get updates every 5–20 ms). Note that this
 753         // means that the digital peak meters are ever so slightly too low
 754         // (each update won't be a faithful representation of the highest peak
 755         // since the previous update, since there are frames we won't draw),
 756         // but the _peak_ of the peak meters will be correct (it's tracked in
 757         // AudioMixer, not here), and that's much more important.
 758         double last_update_age = duration<double>(now - last_audio_level_callback).count();
 759         if (last_update_age < 0.100) {
 760                 return;
 761         }
 762         last_audio_level_callback = now;
 763
 764         post_to_main_thread([=]() {
 765                 ui->vu_meter->set_level(level_lufs);
 766                 for (unsigned bus_index = 0; bus_index < bus_levels.size(); ++bus_index) {
 767                         if (bus_index < audio_miniviews.size()) {
 768                                 const AudioMixer::BusLevel &level = bus_levels[bus_index];
 769                                 Ui::AudioMiniView *miniview = audio_miniviews[bus_index];
 770                                 miniview->peak_meter->set_level(
 771                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 772                                 miniview->peak_meter->set_peak(
 773                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 774                                 set_peak_label(miniview->peak_display_label, level.historic_peak_dbfs);
 775
 776                                 Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 777                                 view->peak_meter->set_level(
 778                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 779                                 view->peak_meter->set_peak(
 780                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 781                                 view->reduction_meter->set_level(level.compressor_attenuation_db);
 782                                 view->gainstaging_knob->blockSignals(true);
 783                                 view->gainstaging_knob->setValue(lrintf(level.gain_staging_db * 10.0f));
 784                                 view->gainstaging_knob->blockSignals(false);
 785                                 view->gainstaging_db_display->setText(
 786                                         QString("Gain: ") +
 787                                         QString::fromStdString(format_db(level.gain_staging_db, DB_WITH_SIGN)));
 788                                 set_peak_label(view->peak_display_label, level.historic_peak_dbfs);
 789
 790                                 midi_mapper.set_has_peaked(bus_index, level.historic_peak_dbfs >= -0.1f);
 791                         }
 792                 }
 793                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 794                 ui->correlation_meter->set_correlation(correlation);
 795
 796                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 797                 set_peak_label(ui->peak_display, peak_db);
 798
 799                 // NOTE: Will be invisible when using multitrack audio.
 800                 ui->gainstaging_knob->blockSignals(true);
 801                 ui->gainstaging_knob->setValue(lrintf(bus_levels[0].gain_staging_db * 10.0f));
 802                 ui->gainstaging_knob->blockSignals(false);
 803                 ui->gainstaging_db_display->setText(
 804                         QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
 805
 806                 ui->makeup_gain_knob->blockSignals(true);
 807                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 808                 ui->makeup_gain_knob->blockSignals(false);
 809                 ui->makeup_gain_db_display->setText(
 810                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 811                 ui->makeup_gain_db_display_2->setText(
 812                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 813
 814                 // Peak labels could have changed.
 815                 midi_mapper.refresh_lights();
 816         });
 817 }
 818
 819 void MainWindow::relayout()
 820 {
 821         int height = ui->vertical_layout->geometry().height();
 822
 823         double remaining_height = height;
 824
 825         // Allocate the height; the most important part is to keep the main displays
 826         // at 16:9 if at all possible.
 827         double me_width = ui->me_preview->width();
 828         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 829
 830         // TODO: Scale the widths when we need to do this.
 831         if (me_height / double(height) > 0.8) {
 832                 me_height = height * 0.8;
 833         }
 834         remaining_height -= me_height + ui->vertical_layout->spacing();
 835
 836         // Space between the M/E displays and the audio strip.
 837         remaining_height -= ui->vertical_layout->spacing();
 838
 839         // The label above the audio strip.
 840         double compact_label_height = ui->compact_label->minimumHeight() +
 841                 ui->compact_audio_layout->spacing();
 842         remaining_height -= compact_label_height;
 843
 844         // The previews will be constrained by the remaining height, and the width.
 845         double preview_label_height = previews[0]->title_bar->geometry().height() +
 846                 previews[0]->main_vertical_layout->spacing();
 847         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 848         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 849         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 850
 851         ui->vertical_layout->setStretch(0, lrintf(me_height));
 852         ui->vertical_layout->setStretch(1,
 853                 lrintf(compact_label_height) +
 854                 lrintf(remaining_height) +
 855                 lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
 856
 857         ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
 858         ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
 859         ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
 860
 861         // Set the widths for the previews.
 862         double preview_width = preview_height * 16.0 / 9.0;
 863         for (unsigned i = 0; i < previews.size(); ++i) {
 864                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 865         }
 866
 867         // The preview horizontal spacer.
 868         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 869         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 870 }
 871
 872 void MainWindow::set_locut(float value)
 873 {
 874         set_relative_value(ui->locut_cutoff_knob, value);
 875 }
 876
 877 void MainWindow::set_limiter_threshold(float value)
 878 {
 879         set_relative_value(ui->limiter_threshold_knob, value);
 880 }
 881
 882 void MainWindow::set_makeup_gain(float value)
 883 {
 884         set_relative_value(ui->makeup_gain_knob, value);
 885 }
 886
 887 void MainWindow::set_treble(unsigned bus_idx, float value)
 888 {
 889         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, value);
 890 }
 891
 892 void MainWindow::set_mid(unsigned bus_idx, float value)
 893 {
 894         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, value);
 895 }
 896
 897 void MainWindow::set_bass(unsigned bus_idx, float value)
 898 {
 899         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, value);
 900 }
 901
 902 void MainWindow::set_gain(unsigned bus_idx, float value)
 903 {
 904         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, value);
 905 }
 906
 907 void MainWindow::set_compressor_threshold(unsigned bus_idx, float value)
 908 {
 909         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, value);
 910 }
 911
 912 void MainWindow::set_fader(unsigned bus_idx, float value)
 913 {
 914         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::fader, value);
 915 }
 916
 917 void MainWindow::toggle_locut(unsigned bus_idx)
 918 {
 919         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled);
 920 }
 921
 922 void MainWindow::toggle_auto_gain_staging(unsigned bus_idx)
 923 {
 924         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox);
 925 }
 926
 927 void MainWindow::toggle_compressor(unsigned bus_idx)
 928 {
 929         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled);
 930 }
 931
 932 void MainWindow::clear_peak(unsigned bus_idx)
 933 {
 934         post_to_main_thread([=]{
 935                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 936                         global_audio_mixer->reset_peak(bus_idx);
 937                         midi_mapper.set_has_peaked(bus_idx, false);
 938                         midi_mapper.refresh_lights();
 939                 }
 940         });
 941 }
 942
 943 void MainWindow::clear_all_highlights()
 944 {
 945         post_to_main_thread([this]{
 946                 highlight_locut(false);
 947                 highlight_limiter_threshold(false);
 948                 highlight_makeup_gain(false);
 949                 highlight_toggle_limiter(false);
 950                 highlight_toggle_auto_makeup_gain(false);
 951                 for (unsigned bus_idx = 0; bus_idx < audio_expanded_views.size(); ++bus_idx) {
 952                         highlight_treble(bus_idx, false);
 953                         highlight_mid(bus_idx, false);
 954                         highlight_bass(bus_idx, false);
 955                         highlight_gain(bus_idx, false);
 956                         highlight_compressor_threshold(bus_idx, false);
 957                         highlight_fader(bus_idx, false);
 958                         highlight_toggle_locut(bus_idx, false);
 959                         highlight_toggle_auto_gain_staging(bus_idx, false);
 960                         highlight_toggle_compressor(bus_idx, false);
 961                 }
 962         });
 963 }
 964
 965 void MainWindow::toggle_limiter()
 966 {
 967         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 968                 ui->limiter_enabled->click();
 969         }
 970 }
 971
 972 void MainWindow::toggle_auto_makeup_gain()
 973 {
 974         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 975                 ui->makeup_gain_auto_checkbox->click();
 976         }
 977 }
 978
 979 void MainWindow::highlight_locut(bool highlight)
 980 {
 981         post_to_main_thread([this, highlight]{
 982                 highlight_control(ui->locut_cutoff_knob, highlight);
 983                 highlight_control(ui->locut_cutoff_knob_2, highlight);
 984         });
 985 }
 986
 987 void MainWindow::highlight_limiter_threshold(bool highlight)
 988 {
 989         post_to_main_thread([this, highlight]{
 990                 highlight_control(ui->limiter_threshold_knob, highlight);
 991                 highlight_control(ui->limiter_threshold_knob_2, highlight);
 992         });
 993 }
 994
 995 void MainWindow::highlight_makeup_gain(bool highlight)
 996 {
 997         post_to_main_thread([this, highlight]{
 998                 highlight_control(ui->makeup_gain_knob, highlight);
 999                 highlight_control(ui->makeup_gain_knob_2, highlight);
1000         });
1001 }
1002
1003 void MainWindow::highlight_treble(unsigned bus_idx, bool highlight)
1004 {
1005         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, highlight);
1006 }
1007
1008 void MainWindow::highlight_mid(unsigned bus_idx, bool highlight)
1009 {
1010         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, highlight);
1011 }
1012
1013 void MainWindow::highlight_bass(unsigned bus_idx, bool highlight)
1014 {
1015         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, highlight);
1016 }
1017
1018 void MainWindow::highlight_gain(unsigned bus_idx, bool highlight)
1019 {
1020         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, highlight);
1021 }
1022
1023 void MainWindow::highlight_compressor_threshold(unsigned bus_idx, bool highlight)
1024 {
1025         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, highlight);
1026 }
1027
1028 void MainWindow::highlight_fader(unsigned bus_idx, bool highlight)
1029 {
1030         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::fader, highlight);
1031 }
1032
1033 void MainWindow::highlight_toggle_locut(unsigned bus_idx, bool highlight)
1034 {
1035         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled, highlight);
1036 }
1037
1038 void MainWindow::highlight_toggle_auto_gain_staging(unsigned bus_idx, bool highlight)
1039 {
1040         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox, highlight);
1041 }
1042
1043 void MainWindow::highlight_toggle_compressor(unsigned bus_idx, bool highlight)
1044 {
1045         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled, highlight);
1046 }
1047
1048 void MainWindow::highlight_toggle_limiter(bool highlight)
1049 {
1050         post_to_main_thread([this, highlight]{
1051                 highlight_control(ui->limiter_enabled, highlight);
1052                 highlight_control(ui->limiter_enabled_2, highlight);
1053         });
1054 }
1055
1056 void MainWindow::highlight_toggle_auto_makeup_gain(bool highlight)
1057 {
1058         post_to_main_thread([this, highlight]{
1059                 highlight_control(ui->makeup_gain_auto_checkbox, highlight);
1060                 highlight_control(ui->makeup_gain_auto_checkbox_2, highlight);
1061         });
1062 }
1063
1064 template<class T>
1065 void MainWindow::set_relative_value(T *control, float value)
1066 {
1067         post_to_main_thread([control, value]{
1068                 control->setValue(lrintf(control->minimum() + value * (control->maximum() - control->minimum())));
1069         });
1070 }
1071
1072 template<class T>
1073 void MainWindow::set_relative_value_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), float value)
1074 {
1075         if (global_audio_mixer != nullptr &&
1076             global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1077             bus_idx < audio_expanded_views.size()) {
1078                 set_relative_value(audio_expanded_views[bus_idx]->*control, value);
1079         }
1080 }
1081
1082 template<class T>
1083 void MainWindow::click_button_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control))
1084 {
1085         post_to_main_thread([this, bus_idx, control]{
1086                 if (global_audio_mixer != nullptr &&
1087                     global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1088                     bus_idx < audio_expanded_views.size()) {
1089                         (audio_expanded_views[bus_idx]->*control)->click();
1090                 }
1091         });
1092 }
1093
1094 template<class T>
1095 void MainWindow::highlight_control(T *control, bool highlight)
1096 {
1097         if (control == nullptr) {
1098                 return;
1099         }
1100         if (global_audio_mixer == nullptr ||
1101             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1102                 highlight = false;
1103         }
1104         if (highlight) {
1105                 control->setStyleSheet("background: rgb(0,255,0,80)");
1106         } else {
1107                 control->setStyleSheet("");
1108         }
1109 }
1110
1111 template<class T>
1112 void MainWindow::highlight_control_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), bool highlight)
1113 {
1114         post_to_main_thread([this, bus_idx, control, highlight]{
1115                 if (bus_idx < audio_expanded_views.size()) {
1116                         highlight_control(audio_expanded_views[bus_idx]->*control, highlight);
1117                 }
1118         });
1119 }
1120
1121 void MainWindow::set_transition_names(vector<string> transition_names)
1122 {
1123         if (transition_names.size() < 1 || transition_names[0].empty()) {
1124                 transition_btn1->setText(QString(""));
1125         } else {
1126                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
1127                 ui->transition_btn1->setShortcut(QKeySequence("J"));
1128         }
1129         if (transition_names.size() < 2 || transition_names[1].empty()) {
1130                 transition_btn2->setText(QString(""));
1131         } else {
1132                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
1133                 ui->transition_btn2->setShortcut(QKeySequence("K"));
1134         }
1135         if (transition_names.size() < 3 || transition_names[2].empty()) {
1136                 transition_btn3->setText(QString(""));
1137         } else {
1138                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
1139                 ui->transition_btn3->setShortcut(QKeySequence("L"));
1140         }
1141 }
1142
1143 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
1144 {
1145         if (output >= Mixer::OUTPUT_INPUT0) {
1146                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1147                 previews[channel]->label->setText(name.c_str());
1148         }
1149 }
1150
1151 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
1152 {
1153         if (output >= Mixer::OUTPUT_INPUT0) {
1154                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1155                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
1156         }
1157 }
1158
1159 void MainWindow::transition_clicked(int transition_number)
1160 {
1161         global_mixer->transition_clicked(transition_number);
1162 }
1163
1164 void MainWindow::channel_clicked(int channel_number)
1165 {
1166         if (current_wb_pick_display == channel_number) {
1167                 // The picking was already done from eventFilter(), since we don't get
1168                 // the mouse pointer here.
1169         } else {
1170                 global_mixer->channel_clicked(channel_number);
1171         }
1172 }
1173
1174 void MainWindow::wb_button_clicked(int channel_number)
1175 {
1176         current_wb_pick_display = channel_number;
1177         QApplication::setOverrideCursor(Qt::CrossCursor);
1178 }
1179
1180 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
1181 {
1182         if (current_wb_pick_display != -1 &&
1183             event->type() == QEvent::MouseButtonRelease &&
1184             watched->isWidgetType()) {
1185                 QApplication::restoreOverrideCursor();
1186                 if (watched == previews[current_wb_pick_display]->display) {
1187                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
1188                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
1189                 } else {
1190                         // The user clicked on something else, give up.
1191                         // (The click goes through, which might not be ideal, but, yes.)
1192                         current_wb_pick_display = -1;
1193                 }
1194         }
1195         return false;
1196 }
1197
1198 namespace {
1199
1200 double srgb_to_linear(double x)
1201 {
1202         if (x < 0.04045) {
1203                 return x / 12.92;
1204         } else {
1205                 return pow((x + 0.055) / 1.055, 2.4);
1206         }
1207 }
1208
1209 }  // namespace
1210
1211 void MainWindow::set_white_balance(int channel_number, int x, int y)
1212 {
1213         // Set the white balance to neutral for the grab. It's probably going to
1214         // flicker a bit, but hopefully this display is not live anyway.
1215         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
1216         previews[channel_number]->display->updateGL();
1217         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
1218
1219         double r = srgb_to_linear(qRed(reference_color) / 255.0);
1220         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
1221         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
1222         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
1223         previews[channel_number]->display->updateGL();
1224 }
1225
1226 void MainWindow::audio_state_changed()
1227 {
1228         post_to_main_thread([this]{
1229                 InputMapping mapping = global_audio_mixer->get_input_mapping();
1230                 for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
1231                         const InputMapping::Bus &bus = mapping.buses[bus_index];
1232                         string suffix;
1233                         if (bus.device.type == InputSourceType::ALSA_INPUT) {
1234                                 ALSAPool::Device::State state = global_audio_mixer->get_alsa_card_state(bus.device.index);
1235                                 if (state == ALSAPool::Device::State::STARTING) {
1236                                         suffix = " (busy)";
1237                                 } else if (state == ALSAPool::Device::State::DEAD) {
1238                                         suffix = " (dead)";
1239                                 }
1240                         }
1241
1242                         audio_miniviews[bus_index]->bus_desc_label->setFullText(
1243                                 QString::fromStdString(bus.name + suffix));
1244                         audio_expanded_views[bus_index]->bus_desc_label->setFullText(
1245                                 QString::fromStdString(bus.name + suffix));
1246                 }
1247         });
1248 }