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

   1 #include "mainwindow.h"
   2
   3 #include <assert.h>
   4 #include <signal.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <QAbstractButton>
   9 #include <QAbstractSlider>
  10 #include <QAction>
  11 #include <QActionGroup>
  12 #include <QApplication>
  13 #include <QBoxLayout>
  14 #include <QCheckBox>
  15 #include <QDesktopServices>
  16 #include <QDial>
  17 #include <QDialog>
  18 #include <QEvent>
  19 #include <QFlags>
  20 #include <QFrame>
  21 #include <QImage>
  22 #include <QInputDialog>
  23 #include <QKeySequence>
  24 #include <QLabel>
  25 #include <QLayoutItem>
  26 #include <QMenuBar>
  27 #include <QMessageBox>
  28 #include <QMouseEvent>
  29 #include <QObject>
  30 #include <QPushButton>
  31 #include <QRect>
  32 #include <QRgb>
  33 #include <QShortcut>
  34 #include <QStackedWidget>
  35 #include <QToolButton>
  36 #include <QWidget>
  37 #include <algorithm>
  38 #include <chrono>
  39 #include <cmath>
  40 #include <functional>
  41 #include <limits>
  42 #include <memory>
  43 #include <ratio>
  44 #include <string>
  45 #include <vector>
  46
  47 #include "aboutdialog.h"
  48 #include "alsa_pool.h"
  49 #include "clickable_label.h"
  50 #include "correlation_meter.h"
  51 #include "disk_space_estimator.h"
  52 #include "ellipsis_label.h"
  53 #include "flags.h"
  54 #include "glwidget.h"
  55 #include "input_mapping.h"
  56 #include "input_mapping_dialog.h"
  57 #include "lrameter.h"
  58 #include "midi_mapping.pb.h"
  59 #include "midi_mapping_dialog.h"
  60 #include "mixer.h"
  61 #include "nonlinear_fader.h"
  62 #include "post_to_main_thread.h"
  63 #include "ui_audio_expanded_view.h"
  64 #include "ui_audio_miniview.h"
  65 #include "ui_display.h"
  66 #include "ui_mainwindow.h"
  67 #include "vumeter.h"
  68
  69 using namespace std;
  70 using namespace std::chrono;
  71 using namespace std::placeholders;
  72
  73 Q_DECLARE_METATYPE(std::string);
  74 Q_DECLARE_METATYPE(std::vector<std::string>);
  75
  76 MainWindow *global_mainwindow = nullptr;
  77
  78 // -0.1 dBFS is EBU peak limit. We use it consistently, even for the bus meters
  79 // (which don't calculate interpolate peak, and in general don't follow EBU recommendations).
  80 constexpr float peak_limit_dbfs = -0.1f;
  81
  82 namespace {
  83
  84 void schedule_cut_signal(int ignored)
  85 {
  86         global_mixer->schedule_cut();
  87 }
  88
  89 void quit_signal(int ignored)
  90 {
  91         global_mainwindow->close();
  92 }
  93
  94 void slave_knob(QDial *master, QDial *slave)
  95 {
  96         QWidget::connect(master, &QDial::valueChanged, [slave](int value){
  97                 slave->blockSignals(true);
  98                 slave->setValue(value);
  99                 slave->blockSignals(false);
 100         });
 101         QWidget::connect(slave, &QDial::valueChanged, [master](int value){
 102                 master->setValue(value);
 103         });
 104 }
 105
 106 void slave_checkbox(QCheckBox *master, QCheckBox *slave)
 107 {
 108         QWidget::connect(master, &QCheckBox::stateChanged, [slave](int state){
 109                 slave->blockSignals(true);
 110                 slave->setCheckState(Qt::CheckState(state));
 111                 slave->blockSignals(false);
 112         });
 113         QWidget::connect(slave, &QCheckBox::stateChanged, [master](int state){
 114                 master->setCheckState(Qt::CheckState(state));
 115         });
 116 }
 117
 118 void slave_fader(NonLinearFader *master, NonLinearFader *slave)
 119 {
 120         QWidget::connect(master, &NonLinearFader::dbValueChanged, [slave](double value) {
 121                 slave->blockSignals(true);
 122                 slave->setDbValue(value);
 123                 slave->blockSignals(false);
 124         });
 125         QWidget::connect(slave, &NonLinearFader::dbValueChanged, [master](double value){
 126                 master->setDbValue(value);
 127         });
 128 }
 129
 130 constexpr unsigned DB_NO_FLAGS = 0x0;
 131 constexpr unsigned DB_WITH_SIGN = 0x1;
 132 constexpr unsigned DB_BARE = 0x2;
 133
 134 string format_db(double db, unsigned flags)
 135 {
 136         string text;
 137         if (flags & DB_WITH_SIGN) {
 138                 if (isfinite(db)) {
 139                         char buf[256];
 140                         snprintf(buf, sizeof(buf), "%+.1f", db);
 141                         text = buf;
 142                 } else if (db < 0.0) {
 143                         text = "-∞";
 144                 } else {
 145                         // Should never happen, really.
 146                         text = "+∞";
 147                 }
 148         } else {
 149                 if (isfinite(db)) {
 150                         char buf[256];
 151                         snprintf(buf, sizeof(buf), "%.1f", db);
 152                         text = buf;
 153                 } else if (db < 0.0) {
 154                         text = "-∞";
 155                 } else {
 156                         // Should never happen, really.
 157                         text = "∞";
 158                 }
 159         }
 160         if (!(flags & DB_BARE)) {
 161                 text += " dB";
 162         }
 163         return text;
 164 }
 165
 166 void set_peak_label(QLabel *peak_label, float peak_db)
 167 {
 168         peak_label->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 169
 170         if (peak_db > peak_limit_dbfs) {
 171                 peak_label->setStyleSheet("QLabel { background-color: red; color: white; }");
 172         } else {
 173                 peak_label->setStyleSheet("");
 174         }
 175 }
 176
 177 }  // namespace
 178
 179 MainWindow::MainWindow()
 180         : ui(new Ui::MainWindow), midi_mapper(this)
 181 {
 182         global_mainwindow = this;
 183         ui->setupUi(this);
 184
 185         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 186         disk_free_label = new QLabel(this);
 187         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 188         ui->menuBar->setCornerWidget(disk_free_label);
 189
 190         QActionGroup *audio_mapping_group = new QActionGroup(this);
 191         ui->simple_audio_mode->setActionGroup(audio_mapping_group);
 192         ui->multichannel_audio_mode->setActionGroup(audio_mapping_group);
 193
 194         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
 195         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
 196
 197         // The menus.
 198         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
 199         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
 200         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
 201         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
 202         connect(ui->simple_audio_mode, &QAction::triggered, this, &MainWindow::simple_audio_mode_triggered);
 203         connect(ui->multichannel_audio_mode, &QAction::triggered, this, &MainWindow::multichannel_audio_mode_triggered);
 204         connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
 205         connect(ui->midi_mapping_action, &QAction::triggered, this, &MainWindow::midi_mapping_triggered);
 206         connect(ui->timecode_stream_action, &QAction::triggered, this, &MainWindow::timecode_stream_triggered);
 207         connect(ui->timecode_stdout_action, &QAction::triggered, this, &MainWindow::timecode_stdout_triggered);
 208
 209         ui->timecode_stream_action->setChecked(global_flags.display_timecode_in_stream);
 210         ui->timecode_stdout_action->setChecked(global_flags.display_timecode_on_stdout);
 211
 212         if (global_flags.x264_video_to_http) {
 213                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
 214         } else {
 215                 ui->x264_bitrate_action->setEnabled(false);
 216         }
 217
 218         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 219         // TODO: Make them dynamic.
 220         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
 221         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
 222         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 223
 224         // Aiee...
 225         transition_btn1 = ui->transition_btn1;
 226         transition_btn2 = ui->transition_btn2;
 227         transition_btn3 = ui->transition_btn3;
 228         qRegisterMetaType<string>("std::string");
 229         qRegisterMetaType<vector<string>>("std::vector<std::string>");
 230         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 231         qRegisterMetaType<Mixer::Output>("Mixer::Output");
 232
 233         // Hook up the prev/next buttons on the audio views.
 234         connect(ui->compact_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 235         connect(ui->compact_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 236         connect(ui->full_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 237         connect(ui->full_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 238
 239         // And bind the same to PgUp/PgDown.
 240         auto switch_page = [this]{
 241                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 242                         ui->audio_views->setCurrentIndex(1 - ui->audio_views->currentIndex());
 243                 }
 244         };
 245         connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, switch_page);
 246         connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, switch_page);
 247
 248         last_audio_level_callback = steady_clock::now() - seconds(1);
 249
 250         if (!global_flags.midi_mapping_filename.empty()) {
 251                 MIDIMappingProto midi_mapping;
 252                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 253                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 254                                 global_flags.midi_mapping_filename.c_str());
 255                         exit(1);
 256                 }
 257                 midi_mapper.set_midi_mapping(midi_mapping);
 258         }
 259         midi_mapper.refresh_highlights();
 260         midi_mapper.refresh_lights();
 261 }
 262
 263 void MainWindow::resizeEvent(QResizeEvent* event)
 264 {
 265         QMainWindow::resizeEvent(event);
 266
 267         // Ask for a relayout, but only after the event loop is done doing relayout
 268         // on everything else.
 269         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 270 }
 271
 272 void MainWindow::mixer_created(Mixer *mixer)
 273 {
 274         // Make the previews.
 275         unsigned num_previews = mixer->get_num_channels();
 276
 277         for (unsigned i = 0; i < num_previews; ++i) {
 278                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 279
 280                 QWidget *preview = new QWidget(this);
 281                 Ui::Display *ui_display = new Ui::Display;
 282                 ui_display->setupUi(preview);
 283                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 284                 ui_display->display->set_output(output);
 285                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
 286                 previews.push_back(ui_display);
 287
 288                 // Hook up the click.
 289                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 290
 291                 // Let the theme update the text whenever the resolution or color changed.
 292                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 293                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 294
 295                 // Hook up the keyboard key.
 296                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 297                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 298
 299                 // Hook up the white balance button (irrelevant if invisible).
 300                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 301                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 302         }
 303
 304         global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
 305
 306         slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
 307         slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
 308         slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
 309         slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
 310         slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
 311
 312         reset_audio_mapping_ui();
 313
 314         // TODO: Fetch all of the values these for completeness,
 315         // not just the enable knobs implied by flags.
 316         ui->limiter_enabled->setChecked(global_audio_mixer->get_limiter_enabled());
 317         ui->makeup_gain_auto_checkbox->setChecked(global_audio_mixer->get_final_makeup_gain_auto());
 318
 319         // Controls used only for simple audio fetch their state from the first bus.
 320         constexpr unsigned simple_bus_index = 0;
 321         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 322                 ui->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(simple_bus_index));
 323                 ui->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(simple_bus_index));
 324                 ui->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(simple_bus_index));
 325                 ui->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(simple_bus_index));
 326                 ui->compressor_threshold_db_display->setText(
 327                         QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(simple_bus_index), DB_WITH_SIGN)));
 328         }
 329         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 330                 global_audio_mixer->set_locut_enabled(simple_bus_index, state == Qt::Checked);
 331                 midi_mapper.refresh_lights();
 332         });
 333         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged,
 334                 bind(&MainWindow::gain_staging_knob_changed, this, simple_bus_index, _1));
 335         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 336                 global_audio_mixer->set_gain_staging_auto(simple_bus_index, state == Qt::Checked);
 337                 midi_mapper.refresh_lights();
 338         });
 339         connect(ui->compressor_threshold_knob, &QDial::valueChanged,
 340                 bind(&MainWindow::compressor_threshold_knob_changed, this, simple_bus_index, _1));
 341         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 342                 global_audio_mixer->set_compressor_enabled(simple_bus_index, state == Qt::Checked);
 343                 midi_mapper.refresh_lights();
 344         });
 345
 346         // Global mastering controls.
 347         QString limiter_threshold_label(
 348                 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
 349         ui->limiter_threshold_db_display->setText(limiter_threshold_label);
 350         ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
 351
 352         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 353         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 354
 355         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 356         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 357                 global_audio_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 358                 midi_mapper.refresh_lights();
 359         });
 360
 361         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 362         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 363                 global_audio_mixer->set_limiter_enabled(state == Qt::Checked);
 364                 midi_mapper.refresh_lights();
 365         });
 366         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 367         // Even though we have a reset button right next to it, the fact that
 368         // the expanded audio view labels are clickable makes it natural to
 369         // click this one as well.
 370         connect(ui->peak_display, &ClickableLabel::clicked, this, &MainWindow::reset_meters_button_clicked);
 371         mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 372
 373         midi_mapper.refresh_highlights();
 374         midi_mapper.refresh_lights();
 375         midi_mapper.start_thread();
 376
 377         struct sigaction act;
 378         memset(&act, 0, sizeof(act));
 379         act.sa_handler = schedule_cut_signal;
 380         act.sa_flags = SA_RESTART;
 381         sigaction(SIGHUP, &act, nullptr);
 382
 383         // Mostly for debugging. Don't override SIGINT, that's so evil if
 384         // shutdown isn't instant.
 385         memset(&act, 0, sizeof(act));
 386         act.sa_handler = quit_signal;
 387         act.sa_flags = SA_RESTART;
 388         sigaction(SIGUSR1, &act, nullptr);
 389 }
 390
 391 void MainWindow::reset_audio_mapping_ui()
 392 {
 393         bool simple = (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE);
 394
 395         ui->simple_audio_mode->setChecked(simple);
 396         ui->multichannel_audio_mode->setChecked(!simple);
 397         ui->input_mapping_action->setEnabled(!simple);
 398         ui->midi_mapping_action->setEnabled(!simple);
 399
 400         ui->locut_enabled->setVisible(simple);
 401         ui->gainstaging_label->setVisible(simple);
 402         ui->gainstaging_knob->setVisible(simple);
 403         ui->gainstaging_db_display->setVisible(simple);
 404         ui->gainstaging_auto_checkbox->setVisible(simple);
 405         ui->compressor_threshold_label->setVisible(simple);
 406         ui->compressor_threshold_knob->setVisible(simple);
 407         ui->compressor_threshold_db_display->setVisible(simple);
 408         ui->compressor_enabled->setVisible(simple);
 409
 410         setup_audio_miniview();
 411         setup_audio_expanded_view();
 412
 413         if (simple) {
 414                 ui->audio_views->setCurrentIndex(0);
 415         }
 416         ui->compact_header->setVisible(!simple);
 417
 418         midi_mapper.refresh_highlights();
 419         midi_mapper.refresh_lights();
 420 }
 421
 422 void MainWindow::setup_audio_miniview()
 423 {
 424         // Remove any existing channels.
 425         for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
 426                 delete item->widget();
 427                 delete item;
 428         }
 429         audio_miniviews.clear();
 430
 431         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 432                 return;
 433         }
 434
 435         // Set up brand new ones from the input mapping.
 436         InputMapping mapping = global_audio_mixer->get_input_mapping();
 437         audio_miniviews.resize(mapping.buses.size());
 438         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 439                 QWidget *channel = new QWidget(this);
 440                 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
 441                 ui_audio_miniview->setupUi(channel);
 442                 ui_audio_miniview->bus_desc_label->setFullText(
 443                         QString::fromStdString(mapping.buses[bus_index].name));
 444                 audio_miniviews[bus_index] = ui_audio_miniview;
 445
 446                 // Set up the peak meter.
 447                 VUMeter *peak_meter = ui_audio_miniview->peak_meter;
 448                 peak_meter->set_min_level(-30.0f);
 449                 peak_meter->set_max_level(0.0f);
 450                 peak_meter->set_ref_level(0.0f);
 451
 452                 ui_audio_miniview->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 453
 454                 ui->faders->addWidget(channel);
 455
 456                 connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
 457                         bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
 458                 connect(ui_audio_miniview->peak_display_label, &ClickableLabel::clicked,
 459                         [bus_index]() {
 460                                 global_audio_mixer->reset_peak(bus_index);
 461                         });
 462         }
 463 }
 464
 465 void MainWindow::setup_audio_expanded_view()
 466 {
 467         // Remove any existing channels.
 468         for (QLayoutItem *item; (item = ui->buses->takeAt(0)) != nullptr; ) {
 469                 delete item->widget();
 470                 delete item;
 471         }
 472         audio_expanded_views.clear();
 473
 474         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 475                 return;
 476         }
 477
 478         // Set up brand new ones from the input mapping.
 479         InputMapping mapping = global_audio_mixer->get_input_mapping();
 480         audio_expanded_views.resize(mapping.buses.size());
 481         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 482                 QWidget *channel = new QWidget(this);
 483                 Ui::AudioExpandedView *ui_audio_expanded_view = new Ui::AudioExpandedView;
 484                 ui_audio_expanded_view->setupUi(channel);
 485                 ui_audio_expanded_view->bus_desc_label->setFullText(
 486                         QString::fromStdString(mapping.buses[bus_index].name));
 487                 audio_expanded_views[bus_index] = ui_audio_expanded_view;
 488                 update_eq_label(bus_index, EQ_BAND_TREBLE, global_audio_mixer->get_eq(bus_index, EQ_BAND_TREBLE));
 489                 update_eq_label(bus_index, EQ_BAND_MID, global_audio_mixer->get_eq(bus_index, EQ_BAND_MID));
 490                 update_eq_label(bus_index, EQ_BAND_BASS, global_audio_mixer->get_eq(bus_index, EQ_BAND_BASS));
 491                 ui_audio_expanded_view->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 492                 ui_audio_expanded_view->mute_button->setChecked(global_audio_mixer->get_mute(bus_index) ? Qt::Checked : Qt::Unchecked);
 493                 connect(ui_audio_expanded_view->mute_button, &QPushButton::toggled,
 494                         bind(&MainWindow::mute_button_toggled, this, bus_index, _1));
 495                 ui->buses->addWidget(channel);
 496
 497                 ui_audio_expanded_view->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(bus_index));
 498                 connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 499                         global_audio_mixer->set_locut_enabled(bus_index, state == Qt::Checked);
 500                         midi_mapper.refresh_lights();
 501                 });
 502
 503                 connect(ui_audio_expanded_view->treble_knob, &QDial::valueChanged,
 504                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_TREBLE, _1));
 505                 connect(ui_audio_expanded_view->mid_knob, &QDial::valueChanged,
 506                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_MID, _1));
 507                 connect(ui_audio_expanded_view->bass_knob, &QDial::valueChanged,
 508                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_BASS, _1));
 509
 510                 ui_audio_expanded_view->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(bus_index));
 511                 ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(bus_index));
 512                 ui_audio_expanded_view->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(bus_index));
 513
 514                 connect(ui_audio_expanded_view->gainstaging_knob, &QAbstractSlider::valueChanged, bind(&MainWindow::gain_staging_knob_changed, this, bus_index, _1));
 515                 connect(ui_audio_expanded_view->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, bus_index](int state){
 516                         global_audio_mixer->set_gain_staging_auto(bus_index, state == Qt::Checked);
 517                         midi_mapper.refresh_lights();
 518                 });
 519
 520                 connect(ui_audio_expanded_view->compressor_threshold_knob, &QDial::valueChanged, bind(&MainWindow::compressor_threshold_knob_changed, this, bus_index, _1));
 521                 connect(ui_audio_expanded_view->compressor_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 522                         global_audio_mixer->set_compressor_enabled(bus_index, state == Qt::Checked);
 523                         midi_mapper.refresh_lights();
 524                 });
 525
 526                 slave_fader(audio_miniviews[bus_index]->fader, ui_audio_expanded_view->fader);
 527
 528                 // Set up the peak meter.
 529                 VUMeter *peak_meter = ui_audio_expanded_view->peak_meter;
 530                 peak_meter->set_min_level(-30.0f);
 531                 peak_meter->set_max_level(0.0f);
 532                 peak_meter->set_ref_level(0.0f);
 533
 534                 connect(ui_audio_expanded_view->peak_display_label, &ClickableLabel::clicked,
 535                         [this, bus_index]() {
 536                                 global_audio_mixer->reset_peak(bus_index);
 537                                 midi_mapper.refresh_lights();
 538                         });
 539         }
 540
 541         update_cutoff_labels(global_audio_mixer->get_locut_cutoff());
 542 }
 543
 544 void MainWindow::mixer_shutting_down()
 545 {
 546         ui->me_live->clean_context();
 547         ui->me_preview->clean_context();
 548         for (Ui::Display *display : previews) {
 549                 display->display->clean_context();
 550         }
 551 }
 552
 553 void MainWindow::cut_triggered()
 554 {
 555         global_mixer->schedule_cut();
 556 }
 557
 558 void MainWindow::x264_bitrate_triggered()
 559 {
 560         bool ok;
 561         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);
 562         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 563                 global_flags.x264_bitrate = new_bitrate;
 564                 global_mixer->change_x264_bitrate(new_bitrate);
 565         }
 566 }
 567
 568 void MainWindow::exit_triggered()
 569 {
 570         close();
 571 }
 572
 573 void MainWindow::manual_triggered()
 574 {
 575         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 576                 QMessageBox msgbox;
 577                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 578                 msgbox.exec();
 579         }
 580 }
 581
 582 void MainWindow::about_triggered()
 583 {
 584         AboutDialog().exec();
 585 }
 586
 587 void MainWindow::simple_audio_mode_triggered()
 588 {
 589         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 590                 return;
 591         }
 592         unsigned card_index = global_audio_mixer->get_simple_input();
 593         if (card_index == numeric_limits<unsigned>::max()) {
 594                 QMessageBox::StandardButton reply =
 595                         QMessageBox::question(this,
 596                                 "Mapping too complex",
 597                                 "The current audio mapping is too complicated to be representable in simple mode, "
 598                                         "and will be discarded if you proceed. Really go to simple audio mode?",
 599                                 QMessageBox::Yes | QMessageBox::No);
 600                 if (reply == QMessageBox::No) {
 601                         ui->simple_audio_mode->setChecked(false);
 602                         ui->multichannel_audio_mode->setChecked(true);
 603                         return;
 604                 }
 605                 card_index = 0;
 606         }
 607         global_audio_mixer->set_simple_input(/*card_index=*/card_index);
 608         reset_audio_mapping_ui();
 609 }
 610
 611 void MainWindow::multichannel_audio_mode_triggered()
 612 {
 613         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 614                 return;
 615         }
 616
 617         // Take the generated input mapping from the simple input,
 618         // and set it as a normal multichannel mapping, which causes
 619         // the mode to go to multichannel.
 620         global_audio_mixer->set_input_mapping(global_audio_mixer->get_input_mapping());
 621         reset_audio_mapping_ui();
 622 }
 623
 624 void MainWindow::input_mapping_triggered()
 625 {
 626         if (InputMappingDialog().exec() == QDialog::Accepted) {
 627                 setup_audio_miniview();
 628                 setup_audio_expanded_view();
 629         }
 630         midi_mapper.refresh_highlights();
 631         midi_mapper.refresh_lights();
 632 }
 633
 634 void MainWindow::midi_mapping_triggered()
 635 {
 636         MIDIMappingDialog(&midi_mapper).exec();
 637 }
 638
 639 void MainWindow::timecode_stream_triggered()
 640 {
 641         global_mixer->set_display_timecode_in_stream(ui->timecode_stream_action->isChecked());
 642 }
 643
 644 void MainWindow::timecode_stdout_triggered()
 645 {
 646         global_mixer->set_display_timecode_on_stdout(ui->timecode_stdout_action->isChecked());
 647 }
 648
 649 void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
 650 {
 651         if (bus_index == 0) {
 652                 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 653         }
 654         if (bus_index < audio_expanded_views.size()) {
 655                 audio_expanded_views[bus_index]->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 656         }
 657
 658         float gain_db = value * 0.1f;
 659         global_audio_mixer->set_gain_staging_db(bus_index, gain_db);
 660
 661         // The label will be updated by the audio level callback.
 662 }
 663
 664 void MainWindow::final_makeup_gain_knob_changed(int value)
 665 {
 666         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 667
 668         float gain_db = value * 0.1f;
 669         global_audio_mixer->set_final_makeup_gain_db(gain_db);
 670
 671         // The label will be updated by the audio level callback.
 672 }
 673
 674 void MainWindow::cutoff_knob_changed(int value)
 675 {
 676         float octaves = value * 0.1f;
 677         float cutoff_hz = 20.0 * pow(2.0, octaves);
 678         global_audio_mixer->set_locut_cutoff(cutoff_hz);
 679         update_cutoff_labels(cutoff_hz);
 680 }
 681
 682 void MainWindow::update_cutoff_labels(float cutoff_hz)
 683 {
 684         char buf[256];
 685         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 686         ui->locut_cutoff_display->setText(buf);
 687         ui->locut_cutoff_display_2->setText(buf);
 688
 689         for (unsigned bus_index = 0; bus_index < audio_expanded_views.size(); ++bus_index) {
 690                 audio_expanded_views[bus_index]->locut_enabled->setText(
 691                         QString("Lo-cut: ") + buf);
 692         }
 693 }
 694
 695 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 696 {
 697         char time_str[256];
 698         if (estimated_seconds_left < 60.0) {
 699                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 700         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 701                 int s = lrintf(estimated_seconds_left);
 702                 int m = s / 60;
 703                 s %= 60;
 704                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 705         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 706                 int m = lrintf(estimated_seconds_left / 60.0);
 707                 snprintf(time_str, sizeof(time_str), "%dm", m);
 708         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 709                 int m = lrintf(estimated_seconds_left / 60.0);
 710                 int h = m / 60;
 711                 m %= 60;
 712                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 713         } else {  // More than ten hours: Xh.
 714                 int h = lrintf(estimated_seconds_left / 3600.0);
 715                 snprintf(time_str, sizeof(time_str), "%dh", h);
 716         }
 717         char buf[256];
 718         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 719
 720         std::string label = buf;
 721
 722         post_to_main_thread([this, label]{
 723                 disk_free_label->setText(QString::fromStdString(label));
 724                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 725         });
 726 }
 727
 728 void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
 729 {
 730         float gain_db = value * 0.1f;
 731         global_audio_mixer->set_eq(bus_index, band, gain_db);
 732
 733         update_eq_label(bus_index, band, gain_db);
 734 }
 735
 736 void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
 737 {
 738         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 739         string db_string = format_db(gain_db, DB_WITH_SIGN);
 740         switch (band) {
 741         case EQ_BAND_TREBLE:
 742                 view->treble_label->setText(QString::fromStdString("Treble: " + db_string));
 743                 break;
 744         case EQ_BAND_MID:
 745                 view->mid_label->setText(QString::fromStdString("Mid: " + db_string));
 746                 break;
 747         case EQ_BAND_BASS:
 748                 view->bass_label->setText(QString::fromStdString("Bass: " + db_string));
 749                 break;
 750         default:
 751                 assert(false);
 752         }
 753 }
 754
 755 void MainWindow::limiter_threshold_knob_changed(int value)
 756 {
 757         float threshold_dbfs = value * 0.1f;
 758         global_audio_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 759         ui->limiter_threshold_db_display->setText(
 760                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 761         ui->limiter_threshold_db_display_2->setText(
 762                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 763 }
 764
 765 void MainWindow::compressor_threshold_knob_changed(unsigned bus_index, int value)
 766 {
 767         float threshold_dbfs = value * 0.1f;
 768         global_audio_mixer->set_compressor_threshold_dbfs(bus_index, threshold_dbfs);
 769
 770         QString label(QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 771         if (bus_index == 0) {
 772                 ui->compressor_threshold_db_display->setText(label);
 773         }
 774         if (bus_index < audio_expanded_views.size()) {
 775                 audio_expanded_views[bus_index]->compressor_threshold_db_display->setText(label);
 776         }
 777 }
 778
 779 void MainWindow::mini_fader_changed(int bus, double volume_db)
 780 {
 781         QString label(QString::fromStdString(format_db(volume_db, DB_WITH_SIGN)));
 782         audio_miniviews[bus]->fader_label->setText(label);
 783         audio_expanded_views[bus]->fader_label->setText(label);
 784
 785         global_audio_mixer->set_fader_volume(bus, volume_db);
 786 }
 787
 788 void MainWindow::mute_button_toggled(int bus, bool checked)
 789 {
 790         global_audio_mixer->set_mute(bus, checked);
 791         midi_mapper.refresh_lights();
 792 }
 793
 794 void MainWindow::reset_meters_button_clicked()
 795 {
 796         global_audio_mixer->reset_meters();
 797         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
 798         ui->peak_display->setStyleSheet("");
 799 }
 800
 801 void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<AudioMixer::BusLevel> bus_levels,
 802                                       float global_level_lufs,
 803                                       float range_low_lufs, float range_high_lufs,
 804                                       float final_makeup_gain_db,
 805                                       float correlation)
 806 {
 807         steady_clock::time_point now = steady_clock::now();
 808
 809         // The meters are somewhat inefficient to update. Only update them
 810         // every 100 ms or so (we get updates every 5–20 ms). Note that this
 811         // means that the digital peak meters are ever so slightly too low
 812         // (each update won't be a faithful representation of the highest peak
 813         // since the previous update, since there are frames we won't draw),
 814         // but the _peak_ of the peak meters will be correct (it's tracked in
 815         // AudioMixer, not here), and that's much more important.
 816         double last_update_age = duration<double>(now - last_audio_level_callback).count();
 817         if (last_update_age < 0.100) {
 818                 return;
 819         }
 820         last_audio_level_callback = now;
 821
 822         post_to_main_thread([=]() {
 823                 ui->vu_meter->set_level(level_lufs);
 824                 for (unsigned bus_index = 0; bus_index < bus_levels.size(); ++bus_index) {
 825                         if (bus_index < audio_miniviews.size()) {
 826                                 const AudioMixer::BusLevel &level = bus_levels[bus_index];
 827                                 Ui::AudioMiniView *miniview = audio_miniviews[bus_index];
 828                                 miniview->peak_meter->set_level(
 829                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 830                                 miniview->peak_meter->set_peak(
 831                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 832                                 set_peak_label(miniview->peak_display_label, level.historic_peak_dbfs);
 833
 834                                 Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 835                                 view->peak_meter->set_level(
 836                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 837                                 view->peak_meter->set_peak(
 838                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 839                                 view->reduction_meter->set_reduction_db(level.compressor_attenuation_db);
 840                                 view->gainstaging_knob->blockSignals(true);
 841                                 view->gainstaging_knob->setValue(lrintf(level.gain_staging_db * 10.0f));
 842                                 view->gainstaging_knob->blockSignals(false);
 843                                 view->gainstaging_db_display->setText(
 844                                         QString("Gain: ") +
 845                                         QString::fromStdString(format_db(level.gain_staging_db, DB_WITH_SIGN)));
 846                                 set_peak_label(view->peak_display_label, level.historic_peak_dbfs);
 847
 848                                 midi_mapper.set_has_peaked(bus_index, level.historic_peak_dbfs >= -0.1f);
 849                         }
 850                 }
 851                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 852                 ui->correlation_meter->set_correlation(correlation);
 853
 854                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 855                 set_peak_label(ui->peak_display, peak_db);
 856
 857                 // NOTE: Will be invisible when using multitrack audio.
 858                 ui->gainstaging_knob->blockSignals(true);
 859                 ui->gainstaging_knob->setValue(lrintf(bus_levels[0].gain_staging_db * 10.0f));
 860                 ui->gainstaging_knob->blockSignals(false);
 861                 ui->gainstaging_db_display->setText(
 862                         QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
 863
 864                 ui->makeup_gain_knob->blockSignals(true);
 865                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 866                 ui->makeup_gain_knob->blockSignals(false);
 867                 ui->makeup_gain_db_display->setText(
 868                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 869                 ui->makeup_gain_db_display_2->setText(
 870                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 871
 872                 // Peak labels could have changed.
 873                 midi_mapper.refresh_lights();
 874         });
 875 }
 876
 877 void MainWindow::relayout()
 878 {
 879         int height = ui->vertical_layout->geometry().height();
 880
 881         double remaining_height = height;
 882
 883         // Allocate the height; the most important part is to keep the main displays
 884         // at the right aspect if at all possible.
 885         double me_width = ui->me_preview->width();
 886         double me_height = me_width * double(global_flags.height) / double(global_flags.width) + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 887
 888         // TODO: Scale the widths when we need to do this.
 889         if (me_height / double(height) > 0.8) {
 890                 me_height = height * 0.8;
 891         }
 892         remaining_height -= me_height + ui->vertical_layout->spacing();
 893
 894         // Space between the M/E displays and the audio strip.
 895         remaining_height -= ui->vertical_layout->spacing();
 896
 897         // The label above the audio strip.
 898         double compact_label_height = ui->compact_label->minimumHeight() +
 899                 ui->compact_audio_layout->spacing();
 900         remaining_height -= compact_label_height;
 901
 902         // The previews will be constrained by the remaining height, and the width.
 903         double preview_label_height = previews[0]->title_bar->geometry().height() +
 904                 previews[0]->main_vertical_layout->spacing();
 905         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 906         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * double(global_flags.height) / double(global_flags.width));
 907         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 908
 909         ui->vertical_layout->setStretch(0, lrintf(me_height));
 910         ui->vertical_layout->setStretch(1,
 911                 lrintf(compact_label_height) +
 912                 lrintf(remaining_height) +
 913                 lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
 914
 915         ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
 916         ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
 917         ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
 918
 919         // Set the widths for the previews.
 920         double preview_width = preview_height * double(global_flags.width) / double(global_flags.height);
 921         for (unsigned i = 0; i < previews.size(); ++i) {
 922                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 923         }
 924
 925         // The preview horizontal spacer.
 926         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 927         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 928 }
 929
 930 void MainWindow::set_locut(float value)
 931 {
 932         set_relative_value(ui->locut_cutoff_knob, value);
 933 }
 934
 935 void MainWindow::set_limiter_threshold(float value)
 936 {
 937         set_relative_value(ui->limiter_threshold_knob, value);
 938 }
 939
 940 void MainWindow::set_makeup_gain(float value)
 941 {
 942         set_relative_value(ui->makeup_gain_knob, value);
 943 }
 944
 945 void MainWindow::set_treble(unsigned bus_idx, float value)
 946 {
 947         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, value);
 948 }
 949
 950 void MainWindow::set_mid(unsigned bus_idx, float value)
 951 {
 952         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, value);
 953 }
 954
 955 void MainWindow::set_bass(unsigned bus_idx, float value)
 956 {
 957         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, value);
 958 }
 959
 960 void MainWindow::set_gain(unsigned bus_idx, float value)
 961 {
 962         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, value);
 963 }
 964
 965 void MainWindow::set_compressor_threshold(unsigned bus_idx, float value)
 966 {
 967         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, value);
 968 }
 969
 970 void MainWindow::set_fader(unsigned bus_idx, float value)
 971 {
 972         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::fader, value);
 973 }
 974
 975 void MainWindow::toggle_mute(unsigned bus_idx)
 976 {
 977         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button);
 978 }
 979
 980 void MainWindow::toggle_locut(unsigned bus_idx)
 981 {
 982         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled);
 983 }
 984
 985 void MainWindow::toggle_auto_gain_staging(unsigned bus_idx)
 986 {
 987         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox);
 988 }
 989
 990 void MainWindow::toggle_compressor(unsigned bus_idx)
 991 {
 992         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled);
 993 }
 994
 995 void MainWindow::clear_peak(unsigned bus_idx)
 996 {
 997         post_to_main_thread([=]{
 998                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 999                         global_audio_mixer->reset_peak(bus_idx);
1000                         midi_mapper.set_has_peaked(bus_idx, false);
1001                         midi_mapper.refresh_lights();
1002                 }
1003         });
1004 }
1005
1006 void MainWindow::clear_all_highlights()
1007 {
1008         post_to_main_thread([this]{
1009                 highlight_locut(false);
1010                 highlight_limiter_threshold(false);
1011                 highlight_makeup_gain(false);
1012                 highlight_toggle_limiter(false);
1013                 highlight_toggle_auto_makeup_gain(false);
1014                 for (unsigned bus_idx = 0; bus_idx < audio_expanded_views.size(); ++bus_idx) {
1015                         highlight_treble(bus_idx, false);
1016                         highlight_mid(bus_idx, false);
1017                         highlight_bass(bus_idx, false);
1018                         highlight_gain(bus_idx, false);
1019                         highlight_compressor_threshold(bus_idx, false);
1020                         highlight_fader(bus_idx, false);
1021                         highlight_mute(bus_idx, false);
1022                         highlight_toggle_locut(bus_idx, false);
1023                         highlight_toggle_auto_gain_staging(bus_idx, false);
1024                         highlight_toggle_compressor(bus_idx, false);
1025                 }
1026         });
1027 }
1028
1029 void MainWindow::toggle_limiter()
1030 {
1031         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1032                 ui->limiter_enabled->click();
1033         }
1034 }
1035
1036 void MainWindow::toggle_auto_makeup_gain()
1037 {
1038         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1039                 ui->makeup_gain_auto_checkbox->click();
1040         }
1041 }
1042
1043 void MainWindow::highlight_locut(bool highlight)
1044 {
1045         post_to_main_thread([this, highlight]{
1046                 highlight_control(ui->locut_cutoff_knob, highlight);
1047                 highlight_control(ui->locut_cutoff_knob_2, highlight);
1048         });
1049 }
1050
1051 void MainWindow::highlight_limiter_threshold(bool highlight)
1052 {
1053         post_to_main_thread([this, highlight]{
1054                 highlight_control(ui->limiter_threshold_knob, highlight);
1055                 highlight_control(ui->limiter_threshold_knob_2, highlight);
1056         });
1057 }
1058
1059 void MainWindow::highlight_makeup_gain(bool highlight)
1060 {
1061         post_to_main_thread([this, highlight]{
1062                 highlight_control(ui->makeup_gain_knob, highlight);
1063                 highlight_control(ui->makeup_gain_knob_2, highlight);
1064         });
1065 }
1066
1067 void MainWindow::highlight_treble(unsigned bus_idx, bool highlight)
1068 {
1069         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, highlight);
1070 }
1071
1072 void MainWindow::highlight_mid(unsigned bus_idx, bool highlight)
1073 {
1074         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, highlight);
1075 }
1076
1077 void MainWindow::highlight_bass(unsigned bus_idx, bool highlight)
1078 {
1079         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, highlight);
1080 }
1081
1082 void MainWindow::highlight_gain(unsigned bus_idx, bool highlight)
1083 {
1084         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, highlight);
1085 }
1086
1087 void MainWindow::highlight_compressor_threshold(unsigned bus_idx, bool highlight)
1088 {
1089         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, highlight);
1090 }
1091
1092 void MainWindow::highlight_fader(unsigned bus_idx, bool highlight)
1093 {
1094         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::fader, highlight);
1095 }
1096
1097 void MainWindow::highlight_mute(unsigned bus_idx, bool highlight)
1098 {
1099         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button, highlight, /*is_mute_btton=*/true);
1100 }
1101
1102 void MainWindow::highlight_toggle_locut(unsigned bus_idx, bool highlight)
1103 {
1104         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled, highlight);
1105 }
1106
1107 void MainWindow::highlight_toggle_auto_gain_staging(unsigned bus_idx, bool highlight)
1108 {
1109         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox, highlight);
1110 }
1111
1112 void MainWindow::highlight_toggle_compressor(unsigned bus_idx, bool highlight)
1113 {
1114         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled, highlight);
1115 }
1116
1117 void MainWindow::highlight_toggle_limiter(bool highlight)
1118 {
1119         post_to_main_thread([this, highlight]{
1120                 highlight_control(ui->limiter_enabled, highlight);
1121                 highlight_control(ui->limiter_enabled_2, highlight);
1122         });
1123 }
1124
1125 void MainWindow::highlight_toggle_auto_makeup_gain(bool highlight)
1126 {
1127         post_to_main_thread([this, highlight]{
1128                 highlight_control(ui->makeup_gain_auto_checkbox, highlight);
1129                 highlight_control(ui->makeup_gain_auto_checkbox_2, highlight);
1130         });
1131 }
1132
1133 template<class T>
1134 void MainWindow::set_relative_value(T *control, float value)
1135 {
1136         post_to_main_thread([control, value]{
1137                 control->setValue(lrintf(control->minimum() + value * (control->maximum() - control->minimum())));
1138         });
1139 }
1140
1141 template<class T>
1142 void MainWindow::set_relative_value_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), float value)
1143 {
1144         if (global_audio_mixer != nullptr &&
1145             global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1146             bus_idx < audio_expanded_views.size()) {
1147                 set_relative_value(audio_expanded_views[bus_idx]->*control, value);
1148         }
1149 }
1150
1151 template<class T>
1152 void MainWindow::click_button_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control))
1153 {
1154         post_to_main_thread([this, bus_idx, control]{
1155                 if (global_audio_mixer != nullptr &&
1156                     global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1157                     bus_idx < audio_expanded_views.size()) {
1158                         (audio_expanded_views[bus_idx]->*control)->click();
1159                 }
1160         });
1161 }
1162
1163 template<class T>
1164 void MainWindow::highlight_control(T *control, bool highlight)
1165 {
1166         if (control == nullptr) {
1167                 return;
1168         }
1169         if (global_audio_mixer == nullptr ||
1170             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1171                 highlight = false;
1172         }
1173         if (highlight) {
1174                 control->setStyleSheet("background: rgb(0,255,0,80)");
1175         } else {
1176                 control->setStyleSheet("");
1177         }
1178 }
1179
1180 template<class T>
1181 void MainWindow::highlight_mute_control(T *control, bool highlight)
1182 {
1183         if (control == nullptr) {
1184                 return;
1185         }
1186         if (global_audio_mixer == nullptr ||
1187             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1188                 highlight = false;
1189         }
1190         if (highlight) {
1191                 control->setStyleSheet("QPushButton { background: rgb(0,255,0,80); } QPushButton:checked { background: rgba(255,80,0,140); }");
1192         } else {
1193                 control->setStyleSheet("QPushButton:checked { background: rgba(255,0,0,80); }");
1194         }
1195 }
1196
1197 template<class T>
1198 void MainWindow::highlight_control_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), bool highlight, bool is_mute_button)
1199 {
1200         post_to_main_thread([this, bus_idx, control, highlight, is_mute_button]{
1201                 if (bus_idx < audio_expanded_views.size()) {
1202                         if (is_mute_button) {
1203                                 highlight_mute_control(audio_expanded_views[bus_idx]->*control, highlight);
1204                         } else {
1205                                 highlight_control(audio_expanded_views[bus_idx]->*control, highlight);
1206                         }
1207                 }
1208         });
1209 }
1210
1211 void MainWindow::set_transition_names(vector<string> transition_names)
1212 {
1213         if (transition_names.size() < 1 || transition_names[0].empty()) {
1214                 transition_btn1->setText(QString(""));
1215         } else {
1216                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
1217                 ui->transition_btn1->setShortcut(QKeySequence("J"));
1218         }
1219         if (transition_names.size() < 2 || transition_names[1].empty()) {
1220                 transition_btn2->setText(QString(""));
1221         } else {
1222                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
1223                 ui->transition_btn2->setShortcut(QKeySequence("K"));
1224         }
1225         if (transition_names.size() < 3 || transition_names[2].empty()) {
1226                 transition_btn3->setText(QString(""));
1227         } else {
1228                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
1229                 ui->transition_btn3->setShortcut(QKeySequence("L"));
1230         }
1231 }
1232
1233 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
1234 {
1235         if (output >= Mixer::OUTPUT_INPUT0) {
1236                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1237                 previews[channel]->label->setText(name.c_str());
1238         }
1239 }
1240
1241 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
1242 {
1243         if (output >= Mixer::OUTPUT_INPUT0) {
1244                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1245                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
1246         }
1247 }
1248
1249 void MainWindow::transition_clicked(int transition_number)
1250 {
1251         global_mixer->transition_clicked(transition_number);
1252 }
1253
1254 void MainWindow::channel_clicked(int channel_number)
1255 {
1256         if (current_wb_pick_display == channel_number) {
1257                 // The picking was already done from eventFilter(), since we don't get
1258                 // the mouse pointer here.
1259         } else {
1260                 global_mixer->channel_clicked(channel_number);
1261         }
1262 }
1263
1264 void MainWindow::wb_button_clicked(int channel_number)
1265 {
1266         current_wb_pick_display = channel_number;
1267         QApplication::setOverrideCursor(Qt::CrossCursor);
1268 }
1269
1270 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
1271 {
1272         if (current_wb_pick_display != -1 &&
1273             event->type() == QEvent::MouseButtonRelease &&
1274             watched->isWidgetType()) {
1275                 QApplication::restoreOverrideCursor();
1276                 if (watched == previews[current_wb_pick_display]->display) {
1277                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
1278                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
1279                 } else {
1280                         // The user clicked on something else, give up.
1281                         // (The click goes through, which might not be ideal, but, yes.)
1282                         current_wb_pick_display = -1;
1283                 }
1284         }
1285         return false;
1286 }
1287
1288 namespace {
1289
1290 double srgb_to_linear(double x)
1291 {
1292         if (x < 0.04045) {
1293                 return x / 12.92;
1294         } else {
1295                 return pow((x + 0.055) / 1.055, 2.4);
1296         }
1297 }
1298
1299 }  // namespace
1300
1301 void MainWindow::set_white_balance(int channel_number, int x, int y)
1302 {
1303         // Set the white balance to neutral for the grab. It's probably going to
1304         // flicker a bit, but hopefully this display is not live anyway.
1305         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
1306         previews[channel_number]->display->updateGL();
1307         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
1308
1309         double r = srgb_to_linear(qRed(reference_color) / 255.0);
1310         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
1311         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
1312         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
1313         previews[channel_number]->display->updateGL();
1314 }
1315
1316 void MainWindow::audio_state_changed()
1317 {
1318         post_to_main_thread([this]{
1319                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
1320                         return;
1321                 }
1322                 InputMapping mapping = global_audio_mixer->get_input_mapping();
1323                 for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
1324                         const InputMapping::Bus &bus = mapping.buses[bus_index];
1325                         string suffix;
1326                         if (bus.device.type == InputSourceType::ALSA_INPUT) {
1327                                 ALSAPool::Device::State state = global_audio_mixer->get_alsa_card_state(bus.device.index);
1328                                 if (state == ALSAPool::Device::State::STARTING) {
1329                                         suffix = " (busy)";
1330                                 } else if (state == ALSAPool::Device::State::DEAD) {
1331                                         suffix = " (dead)";
1332                                 }
1333                         }
1334
1335                         audio_miniviews[bus_index]->bus_desc_label->setFullText(
1336                                 QString::fromStdString(bus.name + suffix));
1337                         audio_expanded_views[bus_index]->bus_desc_label->setFullText(
1338                                 QString::fromStdString(bus.name + suffix));
1339                 }
1340         });
1341 }