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 <QDial>
  16 #include <QDialog>
  17 #include <QEvent>
  18 #include <QFlags>
  19 #include <QFrame>
  20 #include <QImage>
  21 #include <QInputDialog>
  22 #include <QKeySequence>
  23 #include <QLabel>
  24 #include <QLayoutItem>
  25 #include <QMenuBar>
  26 #include <QMessageBox>
  27 #include <QMouseEvent>
  28 #include <QObject>
  29 #include <QPushButton>
  30 #include <QRect>
  31 #include <QRgb>
  32 #include <QShortcut>
  33 #include <QStackedWidget>
  34 #include <QToolButton>
  35 #include <QWidget>
  36 #include <algorithm>
  37 #include <chrono>
  38 #include <cmath>
  39 #include <functional>
  40 #include <limits>
  41 #include <memory>
  42 #include <ratio>
  43 #include <string>
  44 #include <vector>
  45
  46 #include "aboutdialog.h"
  47 #include "alsa_pool.h"
  48 #include "clickable_label.h"
  49 #include "correlation_meter.h"
  50 #include "disk_space_estimator.h"
  51 #include "ellipsis_label.h"
  52 #include "flags.h"
  53 #include "glwidget.h"
  54 #include "input_mapping.h"
  55 #include "input_mapping_dialog.h"
  56 #include "lrameter.h"
  57 #include "midi_mapping.pb.h"
  58 #include "midi_mapping_dialog.h"
  59 #include "mixer.h"
  60 #include "nonlinear_fader.h"
  61 #include "post_to_main_thread.h"
  62 #include "ui_audio_expanded_view.h"
  63 #include "ui_audio_miniview.h"
  64 #include "ui_display.h"
  65 #include "ui_mainwindow.h"
  66 #include "vumeter.h"
  67
  68 using namespace std;
  69 using namespace std::chrono;
  70 using namespace std::placeholders;
  71
  72 Q_DECLARE_METATYPE(std::string);
  73 Q_DECLARE_METATYPE(std::vector<std::string>);
  74
  75 MainWindow *global_mainwindow = nullptr;
  76
  77 // -0.1 dBFS is EBU peak limit. We use it consistently, even for the bus meters
  78 // (which don't calculate interpolate peak, and in general don't follow EBU recommendations).
  79 constexpr float peak_limit_dbfs = -0.1f;
  80
  81 namespace {
  82
  83 void schedule_cut_signal(int ignored)
  84 {
  85         global_mixer->schedule_cut();
  86 }
  87
  88 void quit_signal(int ignored)
  89 {
  90         global_mainwindow->close();
  91 }
  92
  93 void slave_knob(QDial *master, QDial *slave)
  94 {
  95         QWidget::connect(master, &QDial::valueChanged, [slave](int value){
  96                 slave->blockSignals(true);
  97                 slave->setValue(value);
  98                 slave->blockSignals(false);
  99         });
 100         QWidget::connect(slave, &QDial::valueChanged, [master](int value){
 101                 master->setValue(value);
 102         });
 103 }
 104
 105 void slave_checkbox(QCheckBox *master, QCheckBox *slave)
 106 {
 107         QWidget::connect(master, &QCheckBox::stateChanged, [slave](int state){
 108                 slave->blockSignals(true);
 109                 slave->setCheckState(Qt::CheckState(state));
 110                 slave->blockSignals(false);
 111         });
 112         QWidget::connect(slave, &QCheckBox::stateChanged, [master](int state){
 113                 master->setCheckState(Qt::CheckState(state));
 114         });
 115 }
 116
 117 void slave_fader(NonLinearFader *master, NonLinearFader *slave)
 118 {
 119         QWidget::connect(master, &NonLinearFader::dbValueChanged, [slave](double value) {
 120                 slave->blockSignals(true);
 121                 slave->setDbValue(value);
 122                 slave->blockSignals(false);
 123         });
 124         QWidget::connect(slave, &NonLinearFader::dbValueChanged, [master](double value){
 125                 master->setDbValue(value);
 126         });
 127 }
 128
 129 constexpr unsigned DB_NO_FLAGS = 0x0;
 130 constexpr unsigned DB_WITH_SIGN = 0x1;
 131 constexpr unsigned DB_BARE = 0x2;
 132
 133 string format_db(double db, unsigned flags)
 134 {
 135         string text;
 136         if (flags & DB_WITH_SIGN) {
 137                 if (isfinite(db)) {
 138                         char buf[256];
 139                         snprintf(buf, sizeof(buf), "%+.1f", db);
 140                         text = buf;
 141                 } else if (db < 0.0) {
 142                         text = "-∞";
 143                 } else {
 144                         // Should never happen, really.
 145                         text = "+∞";
 146                 }
 147         } else {
 148                 if (isfinite(db)) {
 149                         char buf[256];
 150                         snprintf(buf, sizeof(buf), "%.1f", db);
 151                         text = buf;
 152                 } else if (db < 0.0) {
 153                         text = "-∞";
 154                 } else {
 155                         // Should never happen, really.
 156                         text = "∞";
 157                 }
 158         }
 159         if (!(flags & DB_BARE)) {
 160                 text += " dB";
 161         }
 162         return text;
 163 }
 164
 165 void set_peak_label(QLabel *peak_label, float peak_db)
 166 {
 167         peak_label->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 168
 169         if (peak_db > peak_limit_dbfs) {
 170                 peak_label->setStyleSheet("QLabel { background-color: red; color: white; }");
 171         } else {
 172                 peak_label->setStyleSheet("");
 173         }
 174 }
 175
 176 }  // namespace
 177
 178 MainWindow::MainWindow()
 179         : ui(new Ui::MainWindow), midi_mapper(this)
 180 {
 181         global_mainwindow = this;
 182         ui->setupUi(this);
 183
 184         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 185         disk_free_label = new QLabel(this);
 186         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 187         ui->menuBar->setCornerWidget(disk_free_label);
 188
 189         QActionGroup *audio_mapping_group = new QActionGroup(this);
 190         ui->simple_audio_mode->setActionGroup(audio_mapping_group);
 191         ui->multichannel_audio_mode->setActionGroup(audio_mapping_group);
 192
 193         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
 194         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
 195
 196         // The menus.
 197         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
 198         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
 199         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
 200         connect(ui->simple_audio_mode, &QAction::triggered, this, &MainWindow::simple_audio_mode_triggered);
 201         connect(ui->multichannel_audio_mode, &QAction::triggered, this, &MainWindow::multichannel_audio_mode_triggered);
 202         connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
 203         connect(ui->midi_mapping_action, &QAction::triggered, this, &MainWindow::midi_mapping_triggered);
 204
 205         if (global_flags.x264_video_to_http) {
 206                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
 207         } else {
 208                 ui->x264_bitrate_action->setEnabled(false);
 209         }
 210
 211         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 212         // TODO: Make them dynamic.
 213         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
 214         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
 215         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 216
 217         // Aiee...
 218         transition_btn1 = ui->transition_btn1;
 219         transition_btn2 = ui->transition_btn2;
 220         transition_btn3 = ui->transition_btn3;
 221         qRegisterMetaType<string>("std::string");
 222         qRegisterMetaType<vector<string>>("std::vector<std::string>");
 223         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 224         qRegisterMetaType<Mixer::Output>("Mixer::Output");
 225
 226         // Hook up the prev/next buttons on the audio views.
 227         connect(ui->compact_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 228         connect(ui->compact_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 229         connect(ui->full_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 230         connect(ui->full_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 231
 232         // And bind the same to PgUp/PgDown.
 233         auto switch_page = [this]{
 234                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 235                         ui->audio_views->setCurrentIndex(1 - ui->audio_views->currentIndex());
 236                 }
 237         };
 238         connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, switch_page);
 239         connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, switch_page);
 240
 241         last_audio_level_callback = steady_clock::now() - seconds(1);
 242
 243         if (!global_flags.midi_mapping_filename.empty()) {
 244                 MIDIMappingProto midi_mapping;
 245                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 246                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 247                                 global_flags.midi_mapping_filename.c_str());
 248                         exit(1);
 249                 }
 250                 midi_mapper.set_midi_mapping(midi_mapping);
 251         }
 252         midi_mapper.start_thread();
 253 }
 254
 255 void MainWindow::resizeEvent(QResizeEvent* event)
 256 {
 257         QMainWindow::resizeEvent(event);
 258
 259         // Ask for a relayout, but only after the event loop is done doing relayout
 260         // on everything else.
 261         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 262 }
 263
 264 void MainWindow::mixer_created(Mixer *mixer)
 265 {
 266         // Make the previews.
 267         unsigned num_previews = mixer->get_num_channels();
 268
 269         for (unsigned i = 0; i < num_previews; ++i) {
 270                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 271
 272                 QWidget *preview = new QWidget(this);
 273                 Ui::Display *ui_display = new Ui::Display;
 274                 ui_display->setupUi(preview);
 275                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 276                 ui_display->display->set_output(output);
 277                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
 278                 previews.push_back(ui_display);
 279
 280                 // Hook up the click.
 281                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 282
 283                 // Let the theme update the text whenever the resolution or color changed.
 284                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 285                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 286
 287                 // Hook up the keyboard key.
 288                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 289                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 290
 291                 // Hook up the white balance button (irrelevant if invisible).
 292                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 293                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 294         }
 295
 296         global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
 297
 298         slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
 299         slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
 300         slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
 301         slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
 302         slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
 303
 304         reset_audio_mapping_ui();
 305
 306         // TODO: Fetch all of the values these for completeness,
 307         // not just the enable knobs implied by flags.
 308         ui->limiter_enabled->setChecked(global_audio_mixer->get_limiter_enabled());
 309         ui->makeup_gain_auto_checkbox->setChecked(global_audio_mixer->get_final_makeup_gain_auto());
 310
 311         // Controls used only for simple audio fetch their state from the first bus.
 312         constexpr unsigned simple_bus_index = 0;
 313         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 314                 ui->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(simple_bus_index));
 315                 ui->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(simple_bus_index));
 316                 ui->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(simple_bus_index));
 317                 ui->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(simple_bus_index));
 318                 ui->compressor_threshold_db_display->setText(
 319                         QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(simple_bus_index), DB_WITH_SIGN)));
 320         }
 321         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 322                 global_audio_mixer->set_locut_enabled(simple_bus_index, state == Qt::Checked);
 323                 midi_mapper.refresh_lights();
 324         });
 325         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged,
 326                 bind(&MainWindow::gain_staging_knob_changed, this, simple_bus_index, _1));
 327         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 328                 global_audio_mixer->set_gain_staging_auto(simple_bus_index, state == Qt::Checked);
 329                 midi_mapper.refresh_lights();
 330         });
 331         connect(ui->compressor_threshold_knob, &QDial::valueChanged,
 332                 bind(&MainWindow::compressor_threshold_knob_changed, this, simple_bus_index, _1));
 333         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 334                 global_audio_mixer->set_compressor_enabled(simple_bus_index, state == Qt::Checked);
 335                 midi_mapper.refresh_lights();
 336         });
 337
 338         // Global mastering controls.
 339         QString limiter_threshold_label(
 340                 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
 341         ui->limiter_threshold_db_display->setText(limiter_threshold_label);
 342         ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
 343
 344         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 345         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 346
 347         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 348         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 349                 global_audio_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 350                 midi_mapper.refresh_lights();
 351         });
 352
 353         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 354         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 355                 global_audio_mixer->set_limiter_enabled(state == Qt::Checked);
 356                 midi_mapper.refresh_lights();
 357         });
 358         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 359         // Even though we have a reset button right next to it, the fact that
 360         // the expanded audio view labels are clickable makes it natural to
 361         // click this one as well.
 362         connect(ui->peak_display, &ClickableLabel::clicked, this, &MainWindow::reset_meters_button_clicked);
 363         mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 364
 365         midi_mapper.refresh_highlights();
 366         midi_mapper.refresh_lights();
 367
 368         struct sigaction act;
 369         memset(&act, 0, sizeof(act));
 370         act.sa_handler = schedule_cut_signal;
 371         act.sa_flags = SA_RESTART;
 372         sigaction(SIGHUP, &act, nullptr);
 373
 374         // Mostly for debugging. Don't override SIGINT, that's so evil if
 375         // shutdown isn't instant.
 376         memset(&act, 0, sizeof(act));
 377         act.sa_handler = quit_signal;
 378         act.sa_flags = SA_RESTART;
 379         sigaction(SIGUSR1, &act, nullptr);
 380 }
 381
 382 void MainWindow::reset_audio_mapping_ui()
 383 {
 384         bool simple = (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE);
 385
 386         ui->simple_audio_mode->setChecked(simple);
 387         ui->multichannel_audio_mode->setChecked(!simple);
 388         ui->input_mapping_action->setEnabled(!simple);
 389         ui->midi_mapping_action->setEnabled(!simple);
 390
 391         ui->locut_enabled->setVisible(simple);
 392         ui->gainstaging_label->setVisible(simple);
 393         ui->gainstaging_knob->setVisible(simple);
 394         ui->gainstaging_db_display->setVisible(simple);
 395         ui->gainstaging_auto_checkbox->setVisible(simple);
 396         ui->compressor_threshold_label->setVisible(simple);
 397         ui->compressor_threshold_knob->setVisible(simple);
 398         ui->compressor_threshold_db_display->setVisible(simple);
 399         ui->compressor_enabled->setVisible(simple);
 400
 401         setup_audio_miniview();
 402         setup_audio_expanded_view();
 403
 404         if (simple) {
 405                 ui->audio_views->setCurrentIndex(0);
 406         }
 407         ui->compact_header->setVisible(!simple);
 408
 409         midi_mapper.refresh_highlights();
 410         midi_mapper.refresh_lights();
 411 }
 412
 413 void MainWindow::setup_audio_miniview()
 414 {
 415         // Remove any existing channels.
 416         for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
 417                 delete item->widget();
 418                 delete item;
 419         }
 420         audio_miniviews.clear();
 421
 422         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 423                 return;
 424         }
 425
 426         // Set up brand new ones from the input mapping.
 427         InputMapping mapping = global_audio_mixer->get_input_mapping();
 428         audio_miniviews.resize(mapping.buses.size());
 429         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 430                 QWidget *channel = new QWidget(this);
 431                 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
 432                 ui_audio_miniview->setupUi(channel);
 433                 ui_audio_miniview->bus_desc_label->setFullText(
 434                         QString::fromStdString(mapping.buses[bus_index].name));
 435                 audio_miniviews[bus_index] = ui_audio_miniview;
 436
 437                 // Set up the peak meter.
 438                 VUMeter *peak_meter = ui_audio_miniview->peak_meter;
 439                 peak_meter->set_min_level(-30.0f);
 440                 peak_meter->set_max_level(0.0f);
 441                 peak_meter->set_ref_level(0.0f);
 442
 443                 ui_audio_miniview->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 444
 445                 ui->faders->addWidget(channel);
 446
 447                 connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
 448                         bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
 449                 connect(ui_audio_miniview->peak_display_label, &ClickableLabel::clicked,
 450                         [bus_index]() {
 451                                 global_audio_mixer->reset_peak(bus_index);
 452                         });
 453         }
 454 }
 455
 456 void MainWindow::setup_audio_expanded_view()
 457 {
 458         // Remove any existing channels.
 459         for (QLayoutItem *item; (item = ui->buses->takeAt(0)) != nullptr; ) {
 460                 delete item->widget();
 461                 delete item;
 462         }
 463         audio_expanded_views.clear();
 464
 465         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 466                 return;
 467         }
 468
 469         // Set up brand new ones from the input mapping.
 470         InputMapping mapping = global_audio_mixer->get_input_mapping();
 471         audio_expanded_views.resize(mapping.buses.size());
 472         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 473                 QWidget *channel = new QWidget(this);
 474                 Ui::AudioExpandedView *ui_audio_expanded_view = new Ui::AudioExpandedView;
 475                 ui_audio_expanded_view->setupUi(channel);
 476                 ui_audio_expanded_view->bus_desc_label->setFullText(
 477                         QString::fromStdString(mapping.buses[bus_index].name));
 478                 audio_expanded_views[bus_index] = ui_audio_expanded_view;
 479                 update_eq_label(bus_index, EQ_BAND_TREBLE, global_audio_mixer->get_eq(bus_index, EQ_BAND_TREBLE));
 480                 update_eq_label(bus_index, EQ_BAND_MID, global_audio_mixer->get_eq(bus_index, EQ_BAND_MID));
 481                 update_eq_label(bus_index, EQ_BAND_BASS, global_audio_mixer->get_eq(bus_index, EQ_BAND_BASS));
 482                 ui_audio_expanded_view->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 483                 ui_audio_expanded_view->mute_button->setChecked(global_audio_mixer->get_mute(bus_index) ? Qt::Checked : Qt::Unchecked);
 484                 connect(ui_audio_expanded_view->mute_button, &QPushButton::toggled,
 485                         bind(&MainWindow::mute_button_toggled, this, bus_index, _1));
 486                 ui->buses->addWidget(channel);
 487
 488                 ui_audio_expanded_view->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(bus_index));
 489                 connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 490                         global_audio_mixer->set_locut_enabled(bus_index, state == Qt::Checked);
 491                         midi_mapper.refresh_lights();
 492                 });
 493
 494                 connect(ui_audio_expanded_view->treble_knob, &QDial::valueChanged,
 495                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_TREBLE, _1));
 496                 connect(ui_audio_expanded_view->mid_knob, &QDial::valueChanged,
 497                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_MID, _1));
 498                 connect(ui_audio_expanded_view->bass_knob, &QDial::valueChanged,
 499                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_BASS, _1));
 500
 501                 ui_audio_expanded_view->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(bus_index));
 502                 ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(bus_index));
 503                 ui_audio_expanded_view->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(bus_index));
 504
 505                 connect(ui_audio_expanded_view->gainstaging_knob, &QAbstractSlider::valueChanged, bind(&MainWindow::gain_staging_knob_changed, this, bus_index, _1));
 506                 connect(ui_audio_expanded_view->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, bus_index](int state){
 507                         global_audio_mixer->set_gain_staging_auto(bus_index, state == Qt::Checked);
 508                         midi_mapper.refresh_lights();
 509                 });
 510
 511                 connect(ui_audio_expanded_view->compressor_threshold_knob, &QDial::valueChanged, bind(&MainWindow::compressor_threshold_knob_changed, this, bus_index, _1));
 512                 connect(ui_audio_expanded_view->compressor_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 513                         global_audio_mixer->set_compressor_enabled(bus_index, state == Qt::Checked);
 514                         midi_mapper.refresh_lights();
 515                 });
 516
 517                 slave_fader(audio_miniviews[bus_index]->fader, ui_audio_expanded_view->fader);
 518
 519                 // Set up the peak meter.
 520                 VUMeter *peak_meter = ui_audio_expanded_view->peak_meter;
 521                 peak_meter->set_min_level(-30.0f);
 522                 peak_meter->set_max_level(0.0f);
 523                 peak_meter->set_ref_level(0.0f);
 524
 525                 connect(ui_audio_expanded_view->peak_display_label, &ClickableLabel::clicked,
 526                         [this, bus_index]() {
 527                                 global_audio_mixer->reset_peak(bus_index);
 528                                 midi_mapper.refresh_lights();
 529                         });
 530
 531                 // Set up the compression attenuation meter.
 532                 VUMeter *reduction_meter = ui_audio_expanded_view->reduction_meter;
 533                 reduction_meter->set_min_level(0.0f);
 534                 reduction_meter->set_max_level(10.0f);
 535                 reduction_meter->set_ref_level(0.0f);
 536                 reduction_meter->set_flip(true);
 537         }
 538
 539         update_cutoff_labels(global_audio_mixer->get_locut_cutoff());
 540 }
 541
 542 void MainWindow::mixer_shutting_down()
 543 {
 544         ui->me_live->clean_context();
 545         ui->me_preview->clean_context();
 546         for (Ui::Display *display : previews) {
 547                 display->display->clean_context();
 548         }
 549 }
 550
 551 void MainWindow::cut_triggered()
 552 {
 553         global_mixer->schedule_cut();
 554 }
 555
 556 void MainWindow::x264_bitrate_triggered()
 557 {
 558         bool ok;
 559         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);
 560         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 561                 global_flags.x264_bitrate = new_bitrate;
 562                 global_mixer->change_x264_bitrate(new_bitrate);
 563         }
 564 }
 565
 566 void MainWindow::exit_triggered()
 567 {
 568         close();
 569 }
 570
 571 void MainWindow::about_triggered()
 572 {
 573         AboutDialog().exec();
 574 }
 575
 576 void MainWindow::simple_audio_mode_triggered()
 577 {
 578         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 579                 return;
 580         }
 581         unsigned card_index = global_audio_mixer->get_simple_input();
 582         if (card_index == numeric_limits<unsigned>::max()) {
 583                 QMessageBox::StandardButton reply =
 584                         QMessageBox::question(this,
 585                                 "Mapping too complex",
 586                                 "The current audio mapping is too complicated to be representable in simple mode, "
 587                                         "and will be discarded if you proceed. Really go to simple audio mode?",
 588                                 QMessageBox::Yes | QMessageBox::No);
 589                 if (reply == QMessageBox::No) {
 590                         ui->simple_audio_mode->setChecked(false);
 591                         ui->multichannel_audio_mode->setChecked(true);
 592                         return;
 593                 }
 594                 card_index = 0;
 595         }
 596         global_audio_mixer->set_simple_input(/*card_index=*/card_index);
 597         reset_audio_mapping_ui();
 598 }
 599
 600 void MainWindow::multichannel_audio_mode_triggered()
 601 {
 602         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 603                 return;
 604         }
 605
 606         // Take the generated input mapping from the simple input,
 607         // and set it as a normal multichannel mapping, which causes
 608         // the mode to go to multichannel.
 609         global_audio_mixer->set_input_mapping(global_audio_mixer->get_input_mapping());
 610         reset_audio_mapping_ui();
 611 }
 612
 613 void MainWindow::input_mapping_triggered()
 614 {
 615         if (InputMappingDialog().exec() == QDialog::Accepted) {
 616                 setup_audio_miniview();
 617                 setup_audio_expanded_view();
 618         }
 619         midi_mapper.refresh_highlights();
 620         midi_mapper.refresh_lights();
 621 }
 622
 623 void MainWindow::midi_mapping_triggered()
 624 {
 625         MIDIMappingDialog(&midi_mapper).exec();
 626 }
 627
 628 void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
 629 {
 630         if (bus_index == 0) {
 631                 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 632         }
 633         if (bus_index < audio_expanded_views.size()) {
 634                 audio_expanded_views[bus_index]->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 635         }
 636
 637         float gain_db = value * 0.1f;
 638         global_audio_mixer->set_gain_staging_db(bus_index, gain_db);
 639
 640         // The label will be updated by the audio level callback.
 641 }
 642
 643 void MainWindow::final_makeup_gain_knob_changed(int value)
 644 {
 645         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 646
 647         float gain_db = value * 0.1f;
 648         global_audio_mixer->set_final_makeup_gain_db(gain_db);
 649
 650         // The label will be updated by the audio level callback.
 651 }
 652
 653 void MainWindow::cutoff_knob_changed(int value)
 654 {
 655         float octaves = value * 0.1f;
 656         float cutoff_hz = 20.0 * pow(2.0, octaves);
 657         global_audio_mixer->set_locut_cutoff(cutoff_hz);
 658         update_cutoff_labels(cutoff_hz);
 659 }
 660
 661 void MainWindow::update_cutoff_labels(float cutoff_hz)
 662 {
 663         char buf[256];
 664         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 665         ui->locut_cutoff_display->setText(buf);
 666         ui->locut_cutoff_display_2->setText(buf);
 667
 668         for (unsigned bus_index = 0; bus_index < audio_expanded_views.size(); ++bus_index) {
 669                 audio_expanded_views[bus_index]->locut_enabled->setText(
 670                         QString("Lo-cut: ") + buf);
 671         }
 672 }
 673
 674 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 675 {
 676         char time_str[256];
 677         if (estimated_seconds_left < 60.0) {
 678                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 679         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 680                 int s = lrintf(estimated_seconds_left);
 681                 int m = s / 60;
 682                 s %= 60;
 683                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 684         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 685                 int m = lrintf(estimated_seconds_left / 60.0);
 686                 snprintf(time_str, sizeof(time_str), "%dm", m);
 687         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 688                 int m = lrintf(estimated_seconds_left / 60.0);
 689                 int h = m / 60;
 690                 m %= 60;
 691                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 692         } else {  // More than ten hours: Xh.
 693                 int h = lrintf(estimated_seconds_left / 3600.0);
 694                 snprintf(time_str, sizeof(time_str), "%dh", h);
 695         }
 696         char buf[256];
 697         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 698
 699         std::string label = buf;
 700
 701         post_to_main_thread([this, label]{
 702                 disk_free_label->setText(QString::fromStdString(label));
 703                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 704         });
 705 }
 706
 707 void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
 708 {
 709         float gain_db = value * 0.1f;
 710         global_audio_mixer->set_eq(bus_index, band, gain_db);
 711
 712         update_eq_label(bus_index, band, gain_db);
 713 }
 714
 715 void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
 716 {
 717         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 718         string db_string = format_db(gain_db, DB_WITH_SIGN);
 719         switch (band) {
 720         case EQ_BAND_TREBLE:
 721                 view->treble_label->setText(QString::fromStdString("Treble: " + db_string));
 722                 break;
 723         case EQ_BAND_MID:
 724                 view->mid_label->setText(QString::fromStdString("Mid: " + db_string));
 725                 break;
 726         case EQ_BAND_BASS:
 727                 view->bass_label->setText(QString::fromStdString("Bass: " + db_string));
 728                 break;
 729         default:
 730                 assert(false);
 731         }
 732 }
 733
 734 void MainWindow::limiter_threshold_knob_changed(int value)
 735 {
 736         float threshold_dbfs = value * 0.1f;
 737         global_audio_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 738         ui->limiter_threshold_db_display->setText(
 739                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 740         ui->limiter_threshold_db_display_2->setText(
 741                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 742 }
 743
 744 void MainWindow::compressor_threshold_knob_changed(unsigned bus_index, int value)
 745 {
 746         float threshold_dbfs = value * 0.1f;
 747         global_audio_mixer->set_compressor_threshold_dbfs(bus_index, threshold_dbfs);
 748
 749         QString label(QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 750         if (bus_index == 0) {
 751                 ui->compressor_threshold_db_display->setText(label);
 752         }
 753         if (bus_index < audio_expanded_views.size()) {
 754                 audio_expanded_views[bus_index]->compressor_threshold_db_display->setText(label);
 755         }
 756 }
 757
 758 void MainWindow::mini_fader_changed(int bus, double volume_db)
 759 {
 760         QString label(QString::fromStdString(format_db(volume_db, DB_WITH_SIGN)));
 761         audio_miniviews[bus]->fader_label->setText(label);
 762         audio_expanded_views[bus]->fader_label->setText(label);
 763
 764         global_audio_mixer->set_fader_volume(bus, volume_db);
 765 }
 766
 767 void MainWindow::mute_button_toggled(int bus, bool checked)
 768 {
 769         global_audio_mixer->set_mute(bus, checked);
 770         midi_mapper.refresh_lights();
 771 }
 772
 773 void MainWindow::reset_meters_button_clicked()
 774 {
 775         global_audio_mixer->reset_meters();
 776         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
 777         ui->peak_display->setStyleSheet("");
 778 }
 779
 780 void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<AudioMixer::BusLevel> bus_levels,
 781                                       float global_level_lufs,
 782                                       float range_low_lufs, float range_high_lufs,
 783                                       float final_makeup_gain_db,
 784                                       float correlation)
 785 {
 786         steady_clock::time_point now = steady_clock::now();
 787
 788         // The meters are somewhat inefficient to update. Only update them
 789         // every 100 ms or so (we get updates every 5–20 ms). Note that this
 790         // means that the digital peak meters are ever so slightly too low
 791         // (each update won't be a faithful representation of the highest peak
 792         // since the previous update, since there are frames we won't draw),
 793         // but the _peak_ of the peak meters will be correct (it's tracked in
 794         // AudioMixer, not here), and that's much more important.
 795         double last_update_age = duration<double>(now - last_audio_level_callback).count();
 796         if (last_update_age < 0.100) {
 797                 return;
 798         }
 799         last_audio_level_callback = now;
 800
 801         post_to_main_thread([=]() {
 802                 ui->vu_meter->set_level(level_lufs);
 803                 for (unsigned bus_index = 0; bus_index < bus_levels.size(); ++bus_index) {
 804                         if (bus_index < audio_miniviews.size()) {
 805                                 const AudioMixer::BusLevel &level = bus_levels[bus_index];
 806                                 Ui::AudioMiniView *miniview = audio_miniviews[bus_index];
 807                                 miniview->peak_meter->set_level(
 808                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 809                                 miniview->peak_meter->set_peak(
 810                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 811                                 set_peak_label(miniview->peak_display_label, level.historic_peak_dbfs);
 812
 813                                 Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 814                                 view->peak_meter->set_level(
 815                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 816                                 view->peak_meter->set_peak(
 817                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 818                                 view->reduction_meter->set_level(level.compressor_attenuation_db);
 819                                 view->gainstaging_knob->blockSignals(true);
 820                                 view->gainstaging_knob->setValue(lrintf(level.gain_staging_db * 10.0f));
 821                                 view->gainstaging_knob->blockSignals(false);
 822                                 view->gainstaging_db_display->setText(
 823                                         QString("Gain: ") +
 824                                         QString::fromStdString(format_db(level.gain_staging_db, DB_WITH_SIGN)));
 825                                 set_peak_label(view->peak_display_label, level.historic_peak_dbfs);
 826
 827                                 midi_mapper.set_has_peaked(bus_index, level.historic_peak_dbfs >= -0.1f);
 828                         }
 829                 }
 830                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 831                 ui->correlation_meter->set_correlation(correlation);
 832
 833                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 834                 set_peak_label(ui->peak_display, peak_db);
 835
 836                 // NOTE: Will be invisible when using multitrack audio.
 837                 ui->gainstaging_knob->blockSignals(true);
 838                 ui->gainstaging_knob->setValue(lrintf(bus_levels[0].gain_staging_db * 10.0f));
 839                 ui->gainstaging_knob->blockSignals(false);
 840                 ui->gainstaging_db_display->setText(
 841                         QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
 842
 843                 ui->makeup_gain_knob->blockSignals(true);
 844                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 845                 ui->makeup_gain_knob->blockSignals(false);
 846                 ui->makeup_gain_db_display->setText(
 847                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 848                 ui->makeup_gain_db_display_2->setText(
 849                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 850
 851                 // Peak labels could have changed.
 852                 midi_mapper.refresh_lights();
 853         });
 854 }
 855
 856 void MainWindow::relayout()
 857 {
 858         int height = ui->vertical_layout->geometry().height();
 859
 860         double remaining_height = height;
 861
 862         // Allocate the height; the most important part is to keep the main displays
 863         // at 16:9 if at all possible.
 864         double me_width = ui->me_preview->width();
 865         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 866
 867         // TODO: Scale the widths when we need to do this.
 868         if (me_height / double(height) > 0.8) {
 869                 me_height = height * 0.8;
 870         }
 871         remaining_height -= me_height + ui->vertical_layout->spacing();
 872
 873         // Space between the M/E displays and the audio strip.
 874         remaining_height -= ui->vertical_layout->spacing();
 875
 876         // The label above the audio strip.
 877         double compact_label_height = ui->compact_label->minimumHeight() +
 878                 ui->compact_audio_layout->spacing();
 879         remaining_height -= compact_label_height;
 880
 881         // The previews will be constrained by the remaining height, and the width.
 882         double preview_label_height = previews[0]->title_bar->geometry().height() +
 883                 previews[0]->main_vertical_layout->spacing();
 884         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 885         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 886         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 887
 888         ui->vertical_layout->setStretch(0, lrintf(me_height));
 889         ui->vertical_layout->setStretch(1,
 890                 lrintf(compact_label_height) +
 891                 lrintf(remaining_height) +
 892                 lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
 893
 894         ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
 895         ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
 896         ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
 897
 898         // Set the widths for the previews.
 899         double preview_width = preview_height * 16.0 / 9.0;
 900         for (unsigned i = 0; i < previews.size(); ++i) {
 901                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 902         }
 903
 904         // The preview horizontal spacer.
 905         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 906         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 907 }
 908
 909 void MainWindow::set_locut(float value)
 910 {
 911         set_relative_value(ui->locut_cutoff_knob, value);
 912 }
 913
 914 void MainWindow::set_limiter_threshold(float value)
 915 {
 916         set_relative_value(ui->limiter_threshold_knob, value);
 917 }
 918
 919 void MainWindow::set_makeup_gain(float value)
 920 {
 921         set_relative_value(ui->makeup_gain_knob, value);
 922 }
 923
 924 void MainWindow::set_treble(unsigned bus_idx, float value)
 925 {
 926         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, value);
 927 }
 928
 929 void MainWindow::set_mid(unsigned bus_idx, float value)
 930 {
 931         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, value);
 932 }
 933
 934 void MainWindow::set_bass(unsigned bus_idx, float value)
 935 {
 936         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, value);
 937 }
 938
 939 void MainWindow::set_gain(unsigned bus_idx, float value)
 940 {
 941         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, value);
 942 }
 943
 944 void MainWindow::set_compressor_threshold(unsigned bus_idx, float value)
 945 {
 946         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, value);
 947 }
 948
 949 void MainWindow::set_fader(unsigned bus_idx, float value)
 950 {
 951         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::fader, value);
 952 }
 953
 954 void MainWindow::toggle_mute(unsigned bus_idx)
 955 {
 956         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button);
 957 }
 958
 959 void MainWindow::toggle_locut(unsigned bus_idx)
 960 {
 961         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled);
 962 }
 963
 964 void MainWindow::toggle_auto_gain_staging(unsigned bus_idx)
 965 {
 966         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox);
 967 }
 968
 969 void MainWindow::toggle_compressor(unsigned bus_idx)
 970 {
 971         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled);
 972 }
 973
 974 void MainWindow::clear_peak(unsigned bus_idx)
 975 {
 976         post_to_main_thread([=]{
 977                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 978                         global_audio_mixer->reset_peak(bus_idx);
 979                         midi_mapper.set_has_peaked(bus_idx, false);
 980                         midi_mapper.refresh_lights();
 981                 }
 982         });
 983 }
 984
 985 void MainWindow::clear_all_highlights()
 986 {
 987         post_to_main_thread([this]{
 988                 highlight_locut(false);
 989                 highlight_limiter_threshold(false);
 990                 highlight_makeup_gain(false);
 991                 highlight_toggle_limiter(false);
 992                 highlight_toggle_auto_makeup_gain(false);
 993                 for (unsigned bus_idx = 0; bus_idx < audio_expanded_views.size(); ++bus_idx) {
 994                         highlight_treble(bus_idx, false);
 995                         highlight_mid(bus_idx, false);
 996                         highlight_bass(bus_idx, false);
 997                         highlight_gain(bus_idx, false);
 998                         highlight_compressor_threshold(bus_idx, false);
 999                         highlight_fader(bus_idx, false);
1000                         highlight_mute(bus_idx, false);
1001                         highlight_toggle_locut(bus_idx, false);
1002                         highlight_toggle_auto_gain_staging(bus_idx, false);
1003                         highlight_toggle_compressor(bus_idx, false);
1004                 }
1005         });
1006 }
1007
1008 void MainWindow::toggle_limiter()
1009 {
1010         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1011                 ui->limiter_enabled->click();
1012         }
1013 }
1014
1015 void MainWindow::toggle_auto_makeup_gain()
1016 {
1017         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1018                 ui->makeup_gain_auto_checkbox->click();
1019         }
1020 }
1021
1022 void MainWindow::highlight_locut(bool highlight)
1023 {
1024         post_to_main_thread([this, highlight]{
1025                 highlight_control(ui->locut_cutoff_knob, highlight);
1026                 highlight_control(ui->locut_cutoff_knob_2, highlight);
1027         });
1028 }
1029
1030 void MainWindow::highlight_limiter_threshold(bool highlight)
1031 {
1032         post_to_main_thread([this, highlight]{
1033                 highlight_control(ui->limiter_threshold_knob, highlight);
1034                 highlight_control(ui->limiter_threshold_knob_2, highlight);
1035         });
1036 }
1037
1038 void MainWindow::highlight_makeup_gain(bool highlight)
1039 {
1040         post_to_main_thread([this, highlight]{
1041                 highlight_control(ui->makeup_gain_knob, highlight);
1042                 highlight_control(ui->makeup_gain_knob_2, highlight);
1043         });
1044 }
1045
1046 void MainWindow::highlight_treble(unsigned bus_idx, bool highlight)
1047 {
1048         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, highlight);
1049 }
1050
1051 void MainWindow::highlight_mid(unsigned bus_idx, bool highlight)
1052 {
1053         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, highlight);
1054 }
1055
1056 void MainWindow::highlight_bass(unsigned bus_idx, bool highlight)
1057 {
1058         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, highlight);
1059 }
1060
1061 void MainWindow::highlight_gain(unsigned bus_idx, bool highlight)
1062 {
1063         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, highlight);
1064 }
1065
1066 void MainWindow::highlight_compressor_threshold(unsigned bus_idx, bool highlight)
1067 {
1068         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, highlight);
1069 }
1070
1071 void MainWindow::highlight_fader(unsigned bus_idx, bool highlight)
1072 {
1073         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::fader, highlight);
1074 }
1075
1076 void MainWindow::highlight_mute(unsigned bus_idx, bool highlight)
1077 {
1078         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button, highlight, /*is_mute_btton=*/true);
1079 }
1080
1081 void MainWindow::highlight_toggle_locut(unsigned bus_idx, bool highlight)
1082 {
1083         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled, highlight);
1084 }
1085
1086 void MainWindow::highlight_toggle_auto_gain_staging(unsigned bus_idx, bool highlight)
1087 {
1088         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox, highlight);
1089 }
1090
1091 void MainWindow::highlight_toggle_compressor(unsigned bus_idx, bool highlight)
1092 {
1093         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled, highlight);
1094 }
1095
1096 void MainWindow::highlight_toggle_limiter(bool highlight)
1097 {
1098         post_to_main_thread([this, highlight]{
1099                 highlight_control(ui->limiter_enabled, highlight);
1100                 highlight_control(ui->limiter_enabled_2, highlight);
1101         });
1102 }
1103
1104 void MainWindow::highlight_toggle_auto_makeup_gain(bool highlight)
1105 {
1106         post_to_main_thread([this, highlight]{
1107                 highlight_control(ui->makeup_gain_auto_checkbox, highlight);
1108                 highlight_control(ui->makeup_gain_auto_checkbox_2, highlight);
1109         });
1110 }
1111
1112 template<class T>
1113 void MainWindow::set_relative_value(T *control, float value)
1114 {
1115         post_to_main_thread([control, value]{
1116                 control->setValue(lrintf(control->minimum() + value * (control->maximum() - control->minimum())));
1117         });
1118 }
1119
1120 template<class T>
1121 void MainWindow::set_relative_value_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), float value)
1122 {
1123         if (global_audio_mixer != nullptr &&
1124             global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1125             bus_idx < audio_expanded_views.size()) {
1126                 set_relative_value(audio_expanded_views[bus_idx]->*control, value);
1127         }
1128 }
1129
1130 template<class T>
1131 void MainWindow::click_button_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control))
1132 {
1133         post_to_main_thread([this, bus_idx, control]{
1134                 if (global_audio_mixer != nullptr &&
1135                     global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1136                     bus_idx < audio_expanded_views.size()) {
1137                         (audio_expanded_views[bus_idx]->*control)->click();
1138                 }
1139         });
1140 }
1141
1142 template<class T>
1143 void MainWindow::highlight_control(T *control, bool highlight)
1144 {
1145         if (control == nullptr) {
1146                 return;
1147         }
1148         if (global_audio_mixer == nullptr ||
1149             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1150                 highlight = false;
1151         }
1152         if (highlight) {
1153                 control->setStyleSheet("background: rgb(0,255,0,80)");
1154         } else {
1155                 control->setStyleSheet("");
1156         }
1157 }
1158
1159 template<class T>
1160 void MainWindow::highlight_mute_control(T *control, bool highlight)
1161 {
1162         if (control == nullptr) {
1163                 return;
1164         }
1165         if (global_audio_mixer == nullptr ||
1166             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1167                 highlight = false;
1168         }
1169         if (highlight) {
1170                 control->setStyleSheet("QPushButton { background: rgb(0,255,0,80); } QPushButton:checked { background: rgba(255,80,0,140); }");
1171         } else {
1172                 control->setStyleSheet("QPushButton:checked { background: rgba(255,0,0,80); }");
1173         }
1174 }
1175
1176 template<class T>
1177 void MainWindow::highlight_control_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), bool highlight, bool is_mute_button)
1178 {
1179         post_to_main_thread([this, bus_idx, control, highlight, is_mute_button]{
1180                 if (bus_idx < audio_expanded_views.size()) {
1181                         if (is_mute_button) {
1182                                 highlight_mute_control(audio_expanded_views[bus_idx]->*control, highlight);
1183                         } else {
1184                                 highlight_control(audio_expanded_views[bus_idx]->*control, highlight);
1185                         }
1186                 }
1187         });
1188 }
1189
1190 void MainWindow::set_transition_names(vector<string> transition_names)
1191 {
1192         if (transition_names.size() < 1 || transition_names[0].empty()) {
1193                 transition_btn1->setText(QString(""));
1194         } else {
1195                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
1196                 ui->transition_btn1->setShortcut(QKeySequence("J"));
1197         }
1198         if (transition_names.size() < 2 || transition_names[1].empty()) {
1199                 transition_btn2->setText(QString(""));
1200         } else {
1201                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
1202                 ui->transition_btn2->setShortcut(QKeySequence("K"));
1203         }
1204         if (transition_names.size() < 3 || transition_names[2].empty()) {
1205                 transition_btn3->setText(QString(""));
1206         } else {
1207                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
1208                 ui->transition_btn3->setShortcut(QKeySequence("L"));
1209         }
1210 }
1211
1212 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
1213 {
1214         if (output >= Mixer::OUTPUT_INPUT0) {
1215                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1216                 previews[channel]->label->setText(name.c_str());
1217         }
1218 }
1219
1220 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
1221 {
1222         if (output >= Mixer::OUTPUT_INPUT0) {
1223                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1224                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
1225         }
1226 }
1227
1228 void MainWindow::transition_clicked(int transition_number)
1229 {
1230         global_mixer->transition_clicked(transition_number);
1231 }
1232
1233 void MainWindow::channel_clicked(int channel_number)
1234 {
1235         if (current_wb_pick_display == channel_number) {
1236                 // The picking was already done from eventFilter(), since we don't get
1237                 // the mouse pointer here.
1238         } else {
1239                 global_mixer->channel_clicked(channel_number);
1240         }
1241 }
1242
1243 void MainWindow::wb_button_clicked(int channel_number)
1244 {
1245         current_wb_pick_display = channel_number;
1246         QApplication::setOverrideCursor(Qt::CrossCursor);
1247 }
1248
1249 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
1250 {
1251         if (current_wb_pick_display != -1 &&
1252             event->type() == QEvent::MouseButtonRelease &&
1253             watched->isWidgetType()) {
1254                 QApplication::restoreOverrideCursor();
1255                 if (watched == previews[current_wb_pick_display]->display) {
1256                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
1257                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
1258                 } else {
1259                         // The user clicked on something else, give up.
1260                         // (The click goes through, which might not be ideal, but, yes.)
1261                         current_wb_pick_display = -1;
1262                 }
1263         }
1264         return false;
1265 }
1266
1267 namespace {
1268
1269 double srgb_to_linear(double x)
1270 {
1271         if (x < 0.04045) {
1272                 return x / 12.92;
1273         } else {
1274                 return pow((x + 0.055) / 1.055, 2.4);
1275         }
1276 }
1277
1278 }  // namespace
1279
1280 void MainWindow::set_white_balance(int channel_number, int x, int y)
1281 {
1282         // Set the white balance to neutral for the grab. It's probably going to
1283         // flicker a bit, but hopefully this display is not live anyway.
1284         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
1285         previews[channel_number]->display->updateGL();
1286         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
1287
1288         double r = srgb_to_linear(qRed(reference_color) / 255.0);
1289         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
1290         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
1291         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
1292         previews[channel_number]->display->updateGL();
1293 }
1294
1295 void MainWindow::audio_state_changed()
1296 {
1297         post_to_main_thread([this]{
1298                 InputMapping mapping = global_audio_mixer->get_input_mapping();
1299                 for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
1300                         const InputMapping::Bus &bus = mapping.buses[bus_index];
1301                         string suffix;
1302                         if (bus.device.type == InputSourceType::ALSA_INPUT) {
1303                                 ALSAPool::Device::State state = global_audio_mixer->get_alsa_card_state(bus.device.index);
1304                                 if (state == ALSAPool::Device::State::STARTING) {
1305                                         suffix = " (busy)";
1306                                 } else if (state == ALSAPool::Device::State::DEAD) {
1307                                         suffix = " (dead)";
1308                                 }
1309                         }
1310
1311                         audio_miniviews[bus_index]->bus_desc_label->setFullText(
1312                                 QString::fromStdString(bus.name + suffix));
1313                         audio_expanded_views[bus_index]->bus_desc_label->setFullText(
1314                                 QString::fromStdString(bus.name + suffix));
1315                 }
1316         });
1317 }