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

   1 #include "mainwindow.h"
   2
   3 #include <assert.h>
   4 #include <signal.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <QAbstractButton>
   9 #include <QAbstractSlider>
  10 #include <QAction>
  11 #include <QActionGroup>
  12 #include <QApplication>
  13 #include <QBoxLayout>
  14 #include <QCheckBox>
  15 #include <QDesktopServices>
  16 #include <QDial>
  17 #include <QDialog>
  18 #include <QEvent>
  19 #include <QFlags>
  20 #include <QFrame>
  21 #include <QImage>
  22 #include <QInputDialog>
  23 #include <QKeySequence>
  24 #include <QLabel>
  25 #include <QLayoutItem>
  26 #include <QMenuBar>
  27 #include <QMessageBox>
  28 #include <QMouseEvent>
  29 #include <QObject>
  30 #include <QPushButton>
  31 #include <QRect>
  32 #include <QRgb>
  33 #include <QShortcut>
  34 #include <QStackedWidget>
  35 #include <QToolButton>
  36 #include <QWidget>
  37 #include <algorithm>
  38 #include <chrono>
  39 #include <cmath>
  40 #include <functional>
  41 #include <limits>
  42 #include <memory>
  43 #include <ratio>
  44 #include <string>
  45 #include <vector>
  46
  47 #include "aboutdialog.h"
  48 #include "alsa_pool.h"
  49 #include "analyzer.h"
  50 #include "clickable_label.h"
  51 #include "context_menus.h"
  52 #include "correlation_meter.h"
  53 #include "disk_space_estimator.h"
  54 #include "ellipsis_label.h"
  55 #include "flags.h"
  56 #include "glwidget.h"
  57 #include "input_mapping.h"
  58 #include "input_mapping_dialog.h"
  59 #include "lrameter.h"
  60 #include "midi_mapping.pb.h"
  61 #include "midi_mapping_dialog.h"
  62 #include "mixer.h"
  63 #include "nonlinear_fader.h"
  64 #include "post_to_main_thread.h"
  65 #include "ui_audio_expanded_view.h"
  66 #include "ui_audio_miniview.h"
  67 #include "ui_display.h"
  68 #include "ui_mainwindow.h"
  69 #include "vumeter.h"
  70
  71 using namespace std;
  72 using namespace std::chrono;
  73 using namespace std::placeholders;
  74
  75 Q_DECLARE_METATYPE(std::string);
  76 Q_DECLARE_METATYPE(std::vector<std::string>);
  77
  78 MainWindow *global_mainwindow = nullptr;
  79
  80 // -0.1 dBFS is EBU peak limit. We use it consistently, even for the bus meters
  81 // (which don't calculate interpolate peak, and in general don't follow EBU recommendations).
  82 constexpr float peak_limit_dbfs = -0.1f;
  83
  84 namespace {
  85
  86 void schedule_cut_signal(int ignored)
  87 {
  88         global_mixer->schedule_cut();
  89 }
  90
  91 void quit_signal(int ignored)
  92 {
  93         global_mainwindow->close();
  94 }
  95
  96 void slave_knob(QDial *master, QDial *slave)
  97 {
  98         QWidget::connect(master, &QDial::valueChanged, [slave](int value){
  99                 slave->blockSignals(true);
 100                 slave->setValue(value);
 101                 slave->blockSignals(false);
 102         });
 103         QWidget::connect(slave, &QDial::valueChanged, [master](int value){
 104                 master->setValue(value);
 105         });
 106 }
 107
 108 void slave_checkbox(QCheckBox *master, QCheckBox *slave)
 109 {
 110         QWidget::connect(master, &QCheckBox::stateChanged, [slave](int state){
 111                 slave->blockSignals(true);
 112                 slave->setCheckState(Qt::CheckState(state));
 113                 slave->blockSignals(false);
 114         });
 115         QWidget::connect(slave, &QCheckBox::stateChanged, [master](int state){
 116                 master->setCheckState(Qt::CheckState(state));
 117         });
 118 }
 119
 120 void slave_fader(NonLinearFader *master, NonLinearFader *slave)
 121 {
 122         QWidget::connect(master, &NonLinearFader::dbValueChanged, [slave](double value) {
 123                 slave->blockSignals(true);
 124                 slave->setDbValue(value);
 125                 slave->blockSignals(false);
 126         });
 127         QWidget::connect(slave, &NonLinearFader::dbValueChanged, [master](double value){
 128                 master->setDbValue(value);
 129         });
 130 }
 131
 132 constexpr unsigned DB_NO_FLAGS = 0x0;
 133 constexpr unsigned DB_WITH_SIGN = 0x1;
 134 constexpr unsigned DB_BARE = 0x2;
 135
 136 string format_db(double db, unsigned flags)
 137 {
 138         string text;
 139         if (flags & DB_WITH_SIGN) {
 140                 if (isfinite(db)) {
 141                         char buf[256];
 142                         snprintf(buf, sizeof(buf), "%+.1f", db);
 143                         text = buf;
 144                 } else if (db < 0.0) {
 145                         text = "-∞";
 146                 } else {
 147                         // Should never happen, really.
 148                         text = "+∞";
 149                 }
 150         } else {
 151                 if (isfinite(db)) {
 152                         char buf[256];
 153                         snprintf(buf, sizeof(buf), "%.1f", db);
 154                         text = buf;
 155                 } else if (db < 0.0) {
 156                         text = "-∞";
 157                 } else {
 158                         // Should never happen, really.
 159                         text = "∞";
 160                 }
 161         }
 162         if (!(flags & DB_BARE)) {
 163                 text += " dB";
 164         }
 165         return text;
 166 }
 167
 168 void set_peak_label(QLabel *peak_label, float peak_db)
 169 {
 170         peak_label->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 171
 172         if (peak_db > peak_limit_dbfs) {
 173                 peak_label->setStyleSheet("QLabel { background-color: red; color: white; }");
 174         } else {
 175                 peak_label->setStyleSheet("");
 176         }
 177 }
 178
 179 }  // namespace
 180
 181 MainWindow::MainWindow()
 182         : ui(new Ui::MainWindow), midi_mapper(this)
 183 {
 184         global_mainwindow = this;
 185         ui->setupUi(this);
 186
 187         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 188         disk_free_label = new QLabel(this);
 189         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 190         ui->menuBar->setCornerWidget(disk_free_label);
 191
 192         QActionGroup *audio_mapping_group = new QActionGroup(this);
 193         ui->simple_audio_mode->setActionGroup(audio_mapping_group);
 194         ui->multichannel_audio_mode->setActionGroup(audio_mapping_group);
 195
 196         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
 197         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
 198
 199         // The menus.
 200         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
 201         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
 202         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
 203         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
 204         connect(ui->open_analyzer_action, &QAction::triggered, this, &MainWindow::open_analyzer_triggered);
 205         connect(ui->simple_audio_mode, &QAction::triggered, this, &MainWindow::simple_audio_mode_triggered);
 206         connect(ui->multichannel_audio_mode, &QAction::triggered, this, &MainWindow::multichannel_audio_mode_triggered);
 207         connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
 208         connect(ui->midi_mapping_action, &QAction::triggered, this, &MainWindow::midi_mapping_triggered);
 209         connect(ui->timecode_stream_action, &QAction::triggered, this, &MainWindow::timecode_stream_triggered);
 210         connect(ui->timecode_stdout_action, &QAction::triggered, this, &MainWindow::timecode_stdout_triggered);
 211
 212         ui->timecode_stream_action->setChecked(global_flags.display_timecode_in_stream);
 213         ui->timecode_stdout_action->setChecked(global_flags.display_timecode_on_stdout);
 214
 215         if (global_flags.x264_video_to_http && isinf(global_flags.x264_crf)) {
 216                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
 217         } else {
 218                 ui->x264_bitrate_action->setEnabled(false);
 219         }
 220
 221         connect(ui->video_menu, &QMenu::aboutToShow, [this]{
 222                 fill_hdmi_sdi_output_device_menu(ui->hdmi_sdi_output_device_menu);
 223                 fill_hdmi_sdi_output_resolution_menu(ui->hdmi_sdi_output_resolution_menu);
 224         });
 225
 226         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 227         // TODO: Make them dynamic.
 228         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
 229         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
 230         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 231
 232         // Aiee...
 233         transition_btn1 = ui->transition_btn1;
 234         transition_btn2 = ui->transition_btn2;
 235         transition_btn3 = ui->transition_btn3;
 236         qRegisterMetaType<string>("std::string");
 237         qRegisterMetaType<vector<string>>("std::vector<std::string>");
 238         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 239         qRegisterMetaType<Mixer::Output>("Mixer::Output");
 240
 241         // Hook up the prev/next buttons on the audio views.
 242         connect(ui->compact_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 243         connect(ui->compact_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 244         connect(ui->full_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 245         connect(ui->full_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 246
 247         // And bind the same to PgUp/PgDown.
 248         auto switch_page = [this]{
 249                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 250                         ui->audio_views->setCurrentIndex(1 - ui->audio_views->currentIndex());
 251                 }
 252         };
 253         connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, switch_page);
 254         connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, switch_page);
 255
 256         last_audio_level_callback = steady_clock::now() - seconds(1);
 257
 258         if (!global_flags.midi_mapping_filename.empty()) {
 259                 MIDIMappingProto midi_mapping;
 260                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 261                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 262                                 global_flags.midi_mapping_filename.c_str());
 263                         exit(1);
 264                 }
 265                 midi_mapper.set_midi_mapping(midi_mapping);
 266         }
 267         midi_mapper.refresh_highlights();
 268         midi_mapper.refresh_lights();
 269 }
 270
 271 void MainWindow::resizeEvent(QResizeEvent* event)
 272 {
 273         QMainWindow::resizeEvent(event);
 274
 275         // Ask for a relayout, but only after the event loop is done doing relayout
 276         // on everything else.
 277         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 278 }
 279
 280 void MainWindow::mixer_created(Mixer *mixer)
 281 {
 282         // Make the previews.
 283         unsigned num_previews = mixer->get_num_channels();
 284
 285         const char qwerty[] = "QWERTYUIOP";
 286         for (unsigned i = 0; i < num_previews; ++i) {
 287                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 288
 289                 QWidget *preview = new QWidget(this);
 290                 Ui::Display *ui_display = new Ui::Display;
 291                 ui_display->setupUi(preview);
 292                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 293                 ui_display->display->set_output(output);
 294                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
 295                 previews.push_back(ui_display);
 296
 297                 // Hook up the click.
 298                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 299
 300                 // Let the theme update the text whenever the resolution or color changed.
 301                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 302                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 303
 304                 // Hook up the keyboard key.
 305                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 306                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 307
 308                 // Hook up the quick-cut key.
 309                 if (i < strlen(qwerty)) {
 310                         QShortcut *shortcut = new QShortcut(QKeySequence(qwerty[i]), this);
 311                         connect(shortcut, &QShortcut::activated, bind(&MainWindow::quick_cut_activated, this, i));
 312                 }
 313
 314                 // Hook up the white balance button (irrelevant if invisible).
 315                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 316                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 317         }
 318
 319         global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
 320
 321         slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
 322         slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
 323         slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
 324         slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
 325         slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
 326
 327         reset_audio_mapping_ui();
 328
 329         // TODO: Fetch all of the values these for completeness,
 330         // not just the enable knobs implied by flags.
 331         ui->limiter_enabled->setChecked(global_audio_mixer->get_limiter_enabled());
 332         ui->makeup_gain_auto_checkbox->setChecked(global_audio_mixer->get_final_makeup_gain_auto());
 333
 334         // Controls used only for simple audio fetch their state from the first bus.
 335         constexpr unsigned simple_bus_index = 0;
 336         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 337                 ui->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(simple_bus_index));
 338                 ui->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(simple_bus_index));
 339                 ui->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(simple_bus_index));
 340                 ui->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(simple_bus_index));
 341                 ui->compressor_threshold_db_display->setText(
 342                         QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(simple_bus_index), DB_WITH_SIGN)));
 343         }
 344         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 345                 global_audio_mixer->set_locut_enabled(simple_bus_index, state == Qt::Checked);
 346                 midi_mapper.refresh_lights();
 347         });
 348         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged,
 349                 bind(&MainWindow::gain_staging_knob_changed, this, simple_bus_index, _1));
 350         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 351                 global_audio_mixer->set_gain_staging_auto(simple_bus_index, state == Qt::Checked);
 352                 midi_mapper.refresh_lights();
 353         });
 354         connect(ui->compressor_threshold_knob, &QDial::valueChanged,
 355                 bind(&MainWindow::compressor_threshold_knob_changed, this, simple_bus_index, _1));
 356         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 357                 global_audio_mixer->set_compressor_enabled(simple_bus_index, state == Qt::Checked);
 358                 midi_mapper.refresh_lights();
 359         });
 360
 361         // Global mastering controls.
 362         QString limiter_threshold_label(
 363                 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
 364         ui->limiter_threshold_db_display->setText(limiter_threshold_label);
 365         ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
 366
 367         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 368         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 369
 370         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 371         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 372                 global_audio_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 373                 midi_mapper.refresh_lights();
 374         });
 375
 376         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 377         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 378                 global_audio_mixer->set_limiter_enabled(state == Qt::Checked);
 379                 midi_mapper.refresh_lights();
 380         });
 381         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 382         // Even though we have a reset button right next to it, the fact that
 383         // the expanded audio view labels are clickable makes it natural to
 384         // click this one as well.
 385         connect(ui->peak_display, &ClickableLabel::clicked, this, &MainWindow::reset_meters_button_clicked);
 386         mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 387
 388         midi_mapper.refresh_highlights();
 389         midi_mapper.refresh_lights();
 390         midi_mapper.start_thread();
 391
 392         analyzer.reset(new Analyzer);
 393
 394         struct sigaction act;
 395         memset(&act, 0, sizeof(act));
 396         act.sa_handler = schedule_cut_signal;
 397         act.sa_flags = SA_RESTART;
 398         sigaction(SIGHUP, &act, nullptr);
 399
 400         // Mostly for debugging. Don't override SIGINT, that's so evil if
 401         // shutdown isn't instant.
 402         memset(&act, 0, sizeof(act));
 403         act.sa_handler = quit_signal;
 404         act.sa_flags = SA_RESTART;
 405         sigaction(SIGUSR1, &act, nullptr);
 406 }
 407
 408 void MainWindow::reset_audio_mapping_ui()
 409 {
 410         bool simple = (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE);
 411
 412         ui->simple_audio_mode->setChecked(simple);
 413         ui->multichannel_audio_mode->setChecked(!simple);
 414         ui->input_mapping_action->setEnabled(!simple);
 415         ui->midi_mapping_action->setEnabled(!simple);
 416
 417         ui->locut_enabled->setVisible(simple);
 418         ui->gainstaging_label->setVisible(simple);
 419         ui->gainstaging_knob->setVisible(simple);
 420         ui->gainstaging_db_display->setVisible(simple);
 421         ui->gainstaging_auto_checkbox->setVisible(simple);
 422         ui->compressor_threshold_label->setVisible(simple);
 423         ui->compressor_threshold_knob->setVisible(simple);
 424         ui->compressor_threshold_db_display->setVisible(simple);
 425         ui->compressor_enabled->setVisible(simple);
 426
 427         setup_audio_miniview();
 428         setup_audio_expanded_view();
 429
 430         if (simple) {
 431                 ui->audio_views->setCurrentIndex(0);
 432         }
 433         ui->compact_header->setVisible(!simple);
 434
 435         midi_mapper.refresh_highlights();
 436         midi_mapper.refresh_lights();
 437 }
 438
 439 void MainWindow::setup_audio_miniview()
 440 {
 441         // Remove any existing channels.
 442         for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
 443                 delete item->widget();
 444                 delete item;
 445         }
 446         audio_miniviews.clear();
 447
 448         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 449                 return;
 450         }
 451
 452         // Set up brand new ones from the input mapping.
 453         InputMapping mapping = global_audio_mixer->get_input_mapping();
 454         audio_miniviews.resize(mapping.buses.size());
 455         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 456                 QWidget *channel = new QWidget(this);
 457                 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
 458                 ui_audio_miniview->setupUi(channel);
 459                 ui_audio_miniview->bus_desc_label->setFullText(
 460                         QString::fromStdString(mapping.buses[bus_index].name));
 461                 audio_miniviews[bus_index] = ui_audio_miniview;
 462
 463                 // Set up the peak meter.
 464                 VUMeter *peak_meter = ui_audio_miniview->peak_meter;
 465                 peak_meter->set_min_level(-30.0f);
 466                 peak_meter->set_max_level(0.0f);
 467                 peak_meter->set_ref_level(0.0f);
 468
 469                 ui_audio_miniview->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 470
 471                 ui->faders->addWidget(channel);
 472
 473                 connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
 474                         bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
 475                 connect(ui_audio_miniview->peak_display_label, &ClickableLabel::clicked,
 476                         [bus_index]() {
 477                                 global_audio_mixer->reset_peak(bus_index);
 478                         });
 479         }
 480 }
 481
 482 void MainWindow::setup_audio_expanded_view()
 483 {
 484         // Remove any existing channels.
 485         for (QLayoutItem *item; (item = ui->buses->takeAt(0)) != nullptr; ) {
 486                 delete item->widget();
 487                 delete item;
 488         }
 489         audio_expanded_views.clear();
 490
 491         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 492                 return;
 493         }
 494
 495         // Set up brand new ones from the input mapping.
 496         InputMapping mapping = global_audio_mixer->get_input_mapping();
 497         audio_expanded_views.resize(mapping.buses.size());
 498         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 499                 QWidget *channel = new QWidget(this);
 500                 Ui::AudioExpandedView *ui_audio_expanded_view = new Ui::AudioExpandedView;
 501                 ui_audio_expanded_view->setupUi(channel);
 502                 ui_audio_expanded_view->bus_desc_label->setFullText(
 503                         QString::fromStdString(mapping.buses[bus_index].name));
 504                 audio_expanded_views[bus_index] = ui_audio_expanded_view;
 505                 update_eq_label(bus_index, EQ_BAND_TREBLE, global_audio_mixer->get_eq(bus_index, EQ_BAND_TREBLE));
 506                 update_eq_label(bus_index, EQ_BAND_MID, global_audio_mixer->get_eq(bus_index, EQ_BAND_MID));
 507                 update_eq_label(bus_index, EQ_BAND_BASS, global_audio_mixer->get_eq(bus_index, EQ_BAND_BASS));
 508                 ui_audio_expanded_view->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 509                 ui_audio_expanded_view->mute_button->setChecked(global_audio_mixer->get_mute(bus_index));
 510                 connect(ui_audio_expanded_view->mute_button, &QPushButton::toggled,
 511                         bind(&MainWindow::mute_button_toggled, this, bus_index, _1));
 512                 ui->buses->addWidget(channel);
 513
 514                 ui_audio_expanded_view->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(bus_index));
 515                 connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 516                         global_audio_mixer->set_locut_enabled(bus_index, state == Qt::Checked);
 517                         midi_mapper.refresh_lights();
 518                 });
 519
 520                 connect(ui_audio_expanded_view->treble_knob, &QDial::valueChanged,
 521                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_TREBLE, _1));
 522                 connect(ui_audio_expanded_view->mid_knob, &QDial::valueChanged,
 523                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_MID, _1));
 524                 connect(ui_audio_expanded_view->bass_knob, &QDial::valueChanged,
 525                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_BASS, _1));
 526
 527                 ui_audio_expanded_view->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(bus_index));
 528                 ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(bus_index));
 529                 ui_audio_expanded_view->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(bus_index));
 530
 531                 connect(ui_audio_expanded_view->gainstaging_knob, &QAbstractSlider::valueChanged, bind(&MainWindow::gain_staging_knob_changed, this, bus_index, _1));
 532                 connect(ui_audio_expanded_view->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, bus_index](int state){
 533                         global_audio_mixer->set_gain_staging_auto(bus_index, state == Qt::Checked);
 534                         midi_mapper.refresh_lights();
 535                 });
 536
 537                 connect(ui_audio_expanded_view->compressor_threshold_knob, &QDial::valueChanged, bind(&MainWindow::compressor_threshold_knob_changed, this, bus_index, _1));
 538                 connect(ui_audio_expanded_view->compressor_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 539                         global_audio_mixer->set_compressor_enabled(bus_index, state == Qt::Checked);
 540                         midi_mapper.refresh_lights();
 541                 });
 542
 543                 slave_fader(audio_miniviews[bus_index]->fader, ui_audio_expanded_view->fader);
 544
 545                 // Set up the peak meter.
 546                 VUMeter *peak_meter = ui_audio_expanded_view->peak_meter;
 547                 peak_meter->set_min_level(-30.0f);
 548                 peak_meter->set_max_level(0.0f);
 549                 peak_meter->set_ref_level(0.0f);
 550
 551                 connect(ui_audio_expanded_view->peak_display_label, &ClickableLabel::clicked,
 552                         [this, bus_index]() {
 553                                 global_audio_mixer->reset_peak(bus_index);
 554                                 midi_mapper.refresh_lights();
 555                         });
 556         }
 557
 558         update_cutoff_labels(global_audio_mixer->get_locut_cutoff());
 559 }
 560
 561 void MainWindow::mixer_shutting_down()
 562 {
 563         ui->me_live->shutdown();
 564         ui->me_preview->shutdown();
 565
 566         for (Ui::Display *display : previews) {
 567                 display->display->shutdown();
 568         }
 569
 570         analyzer->mixer_shutting_down();
 571 }
 572
 573 void MainWindow::cut_triggered()
 574 {
 575         global_mixer->schedule_cut();
 576 }
 577
 578 void MainWindow::x264_bitrate_triggered()
 579 {
 580         bool ok;
 581         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);
 582         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 583                 global_flags.x264_bitrate = new_bitrate;
 584                 global_mixer->change_x264_bitrate(new_bitrate);
 585         }
 586 }
 587
 588 void MainWindow::exit_triggered()
 589 {
 590         close();
 591 }
 592
 593 void MainWindow::manual_triggered()
 594 {
 595         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 596                 QMessageBox msgbox;
 597                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 598                 msgbox.exec();
 599         }
 600 }
 601
 602 void MainWindow::about_triggered()
 603 {
 604         AboutDialog().exec();
 605 }
 606
 607 void MainWindow::open_analyzer_triggered()
 608 {
 609         analyzer->show();
 610 }
 611
 612 void MainWindow::simple_audio_mode_triggered()
 613 {
 614         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 615                 return;
 616         }
 617         unsigned card_index = global_audio_mixer->get_simple_input();
 618         if (card_index == numeric_limits<unsigned>::max()) {
 619                 QMessageBox::StandardButton reply =
 620                         QMessageBox::question(this,
 621                                 "Mapping too complex",
 622                                 "The current audio mapping is too complicated to be representable in simple mode, "
 623                                         "and will be discarded if you proceed. Really go to simple audio mode?",
 624                                 QMessageBox::Yes | QMessageBox::No);
 625                 if (reply == QMessageBox::No) {
 626                         ui->simple_audio_mode->setChecked(false);
 627                         ui->multichannel_audio_mode->setChecked(true);
 628                         return;
 629                 }
 630                 card_index = 0;
 631         }
 632         global_audio_mixer->set_simple_input(/*card_index=*/card_index);
 633         reset_audio_mapping_ui();
 634 }
 635
 636 void MainWindow::multichannel_audio_mode_triggered()
 637 {
 638         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 639                 return;
 640         }
 641
 642         // Take the generated input mapping from the simple input,
 643         // and set it as a normal multichannel mapping, which causes
 644         // the mode to go to multichannel.
 645         global_audio_mixer->set_input_mapping(global_audio_mixer->get_input_mapping());
 646         reset_audio_mapping_ui();
 647 }
 648
 649 void MainWindow::input_mapping_triggered()
 650 {
 651         if (InputMappingDialog().exec() == QDialog::Accepted) {
 652                 setup_audio_miniview();
 653                 setup_audio_expanded_view();
 654         }
 655         midi_mapper.refresh_highlights();
 656         midi_mapper.refresh_lights();
 657 }
 658
 659 void MainWindow::midi_mapping_triggered()
 660 {
 661         MIDIMappingDialog(&midi_mapper).exec();
 662 }
 663
 664 void MainWindow::timecode_stream_triggered()
 665 {
 666         global_mixer->set_display_timecode_in_stream(ui->timecode_stream_action->isChecked());
 667 }
 668
 669 void MainWindow::timecode_stdout_triggered()
 670 {
 671         global_mixer->set_display_timecode_on_stdout(ui->timecode_stdout_action->isChecked());
 672 }
 673
 674 void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
 675 {
 676         if (bus_index == 0) {
 677                 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 678         }
 679         if (bus_index < audio_expanded_views.size()) {
 680                 audio_expanded_views[bus_index]->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 681         }
 682
 683         float gain_db = value * 0.1f;
 684         global_audio_mixer->set_gain_staging_db(bus_index, gain_db);
 685
 686         // The label will be updated by the audio level callback.
 687 }
 688
 689 void MainWindow::final_makeup_gain_knob_changed(int value)
 690 {
 691         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 692
 693         float gain_db = value * 0.1f;
 694         global_audio_mixer->set_final_makeup_gain_db(gain_db);
 695
 696         // The label will be updated by the audio level callback.
 697 }
 698
 699 void MainWindow::cutoff_knob_changed(int value)
 700 {
 701         float octaves = value * 0.1f;
 702         float cutoff_hz = 20.0 * pow(2.0, octaves);
 703         global_audio_mixer->set_locut_cutoff(cutoff_hz);
 704         update_cutoff_labels(cutoff_hz);
 705 }
 706
 707 void MainWindow::update_cutoff_labels(float cutoff_hz)
 708 {
 709         char buf[256];
 710         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 711         ui->locut_cutoff_display->setText(buf);
 712         ui->locut_cutoff_display_2->setText(buf);
 713
 714         for (unsigned bus_index = 0; bus_index < audio_expanded_views.size(); ++bus_index) {
 715                 audio_expanded_views[bus_index]->locut_enabled->setText(
 716                         QString("Lo-cut: ") + buf);
 717         }
 718 }
 719
 720 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 721 {
 722         char time_str[256];
 723         if (estimated_seconds_left < 60.0) {
 724                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 725         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 726                 int s = lrintf(estimated_seconds_left);
 727                 int m = s / 60;
 728                 s %= 60;
 729                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 730         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 731                 int m = lrintf(estimated_seconds_left / 60.0);
 732                 snprintf(time_str, sizeof(time_str), "%dm", m);
 733         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 734                 int m = lrintf(estimated_seconds_left / 60.0);
 735                 int h = m / 60;
 736                 m %= 60;
 737                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 738         } else {  // More than ten hours: Xh.
 739                 int h = lrintf(estimated_seconds_left / 3600.0);
 740                 snprintf(time_str, sizeof(time_str), "%dh", h);
 741         }
 742         char buf[256];
 743         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 744
 745         std::string label = buf;
 746
 747         post_to_main_thread([this, label]{
 748                 disk_free_label->setText(QString::fromStdString(label));
 749                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 750         });
 751 }
 752
 753 void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
 754 {
 755         float gain_db = value * 0.1f;
 756         global_audio_mixer->set_eq(bus_index, band, gain_db);
 757
 758         update_eq_label(bus_index, band, gain_db);
 759 }
 760
 761 void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
 762 {
 763         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 764         string db_string = format_db(gain_db, DB_WITH_SIGN);
 765         switch (band) {
 766         case EQ_BAND_TREBLE:
 767                 view->treble_label->setText(QString::fromStdString("Treble: " + db_string));
 768                 break;
 769         case EQ_BAND_MID:
 770                 view->mid_label->setText(QString::fromStdString("Mid: " + db_string));
 771                 break;
 772         case EQ_BAND_BASS:
 773                 view->bass_label->setText(QString::fromStdString("Bass: " + db_string));
 774                 break;
 775         default:
 776                 assert(false);
 777         }
 778 }
 779
 780 void MainWindow::limiter_threshold_knob_changed(int value)
 781 {
 782         float threshold_dbfs = value * 0.1f;
 783         global_audio_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 784         ui->limiter_threshold_db_display->setText(
 785                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 786         ui->limiter_threshold_db_display_2->setText(
 787                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 788 }
 789
 790 void MainWindow::compressor_threshold_knob_changed(unsigned bus_index, int value)
 791 {
 792         float threshold_dbfs = value * 0.1f;
 793         global_audio_mixer->set_compressor_threshold_dbfs(bus_index, threshold_dbfs);
 794
 795         QString label(QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 796         if (bus_index == 0) {
 797                 ui->compressor_threshold_db_display->setText(label);
 798         }
 799         if (bus_index < audio_expanded_views.size()) {
 800                 audio_expanded_views[bus_index]->compressor_threshold_db_display->setText(label);
 801         }
 802 }
 803
 804 void MainWindow::mini_fader_changed(int bus, double volume_db)
 805 {
 806         QString label(QString::fromStdString(format_db(volume_db, DB_WITH_SIGN)));
 807         audio_miniviews[bus]->fader_label->setText(label);
 808         audio_expanded_views[bus]->fader_label->setText(label);
 809
 810         global_audio_mixer->set_fader_volume(bus, volume_db);
 811 }
 812
 813 void MainWindow::mute_button_toggled(int bus, bool checked)
 814 {
 815         global_audio_mixer->set_mute(bus, checked);
 816         midi_mapper.refresh_lights();
 817 }
 818
 819 void MainWindow::reset_meters_button_clicked()
 820 {
 821         global_audio_mixer->reset_meters();
 822         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
 823         ui->peak_display->setStyleSheet("");
 824 }
 825
 826 void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<AudioMixer::BusLevel> bus_levels,
 827                                       float global_level_lufs,
 828                                       float range_low_lufs, float range_high_lufs,
 829                                       float final_makeup_gain_db,
 830                                       float correlation)
 831 {
 832         steady_clock::time_point now = steady_clock::now();
 833
 834         // The meters are somewhat inefficient to update. Only update them
 835         // every 100 ms or so (we get updates every 5–20 ms). Note that this
 836         // means that the digital peak meters are ever so slightly too low
 837         // (each update won't be a faithful representation of the highest peak
 838         // since the previous update, since there are frames we won't draw),
 839         // but the _peak_ of the peak meters will be correct (it's tracked in
 840         // AudioMixer, not here), and that's much more important.
 841         double last_update_age = duration<double>(now - last_audio_level_callback).count();
 842         if (last_update_age < 0.100) {
 843                 return;
 844         }
 845         last_audio_level_callback = now;
 846
 847         post_to_main_thread([=]() {
 848                 ui->vu_meter->set_level(level_lufs);
 849                 for (unsigned bus_index = 0; bus_index < bus_levels.size(); ++bus_index) {
 850                         if (bus_index < audio_miniviews.size()) {
 851                                 const AudioMixer::BusLevel &level = bus_levels[bus_index];
 852                                 Ui::AudioMiniView *miniview = audio_miniviews[bus_index];
 853                                 miniview->peak_meter->set_level(
 854                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 855                                 miniview->peak_meter->set_peak(
 856                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 857                                 set_peak_label(miniview->peak_display_label, level.historic_peak_dbfs);
 858
 859                                 Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 860                                 view->peak_meter->set_level(
 861                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 862                                 view->peak_meter->set_peak(
 863                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 864                                 view->reduction_meter->set_reduction_db(level.compressor_attenuation_db);
 865                                 view->gainstaging_knob->blockSignals(true);
 866                                 view->gainstaging_knob->setValue(lrintf(level.gain_staging_db * 10.0f));
 867                                 view->gainstaging_knob->blockSignals(false);
 868                                 view->gainstaging_db_display->setText(
 869                                         QString("Gain: ") +
 870                                         QString::fromStdString(format_db(level.gain_staging_db, DB_WITH_SIGN)));
 871                                 set_peak_label(view->peak_display_label, level.historic_peak_dbfs);
 872
 873                                 midi_mapper.set_has_peaked(bus_index, level.historic_peak_dbfs >= -0.1f);
 874                         }
 875                 }
 876                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 877                 ui->correlation_meter->set_correlation(correlation);
 878
 879                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 880                 set_peak_label(ui->peak_display, peak_db);
 881
 882                 // NOTE: Will be invisible when using multitrack audio.
 883                 ui->gainstaging_knob->blockSignals(true);
 884                 ui->gainstaging_knob->setValue(lrintf(bus_levels[0].gain_staging_db * 10.0f));
 885                 ui->gainstaging_knob->blockSignals(false);
 886                 ui->gainstaging_db_display->setText(
 887                         QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
 888
 889                 ui->makeup_gain_knob->blockSignals(true);
 890                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 891                 ui->makeup_gain_knob->blockSignals(false);
 892                 ui->makeup_gain_db_display->setText(
 893                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 894                 ui->makeup_gain_db_display_2->setText(
 895                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 896
 897                 // Peak labels could have changed.
 898                 midi_mapper.refresh_lights();
 899         });
 900 }
 901
 902 void MainWindow::relayout()
 903 {
 904         int height = ui->vertical_layout->geometry().height();
 905
 906         double remaining_height = height;
 907
 908         // Allocate the height; the most important part is to keep the main displays
 909         // at the right aspect if at all possible.
 910         double me_width = ui->me_preview->width();
 911         double me_height = me_width * double(global_flags.height) / double(global_flags.width) + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 912
 913         // TODO: Scale the widths when we need to do this.
 914         if (me_height / double(height) > 0.8) {
 915                 me_height = height * 0.8;
 916         }
 917         remaining_height -= me_height + ui->vertical_layout->spacing();
 918
 919         // Space between the M/E displays and the audio strip.
 920         remaining_height -= ui->vertical_layout->spacing();
 921
 922         // The label above the audio strip.
 923         double compact_label_height = ui->compact_label->minimumHeight() +
 924                 ui->compact_audio_layout->spacing();
 925         remaining_height -= compact_label_height;
 926
 927         // The previews will be constrained by the remaining height, and the width.
 928         double preview_label_height = previews[0]->title_bar->geometry().height() +
 929                 previews[0]->main_vertical_layout->spacing();
 930         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 931         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * double(global_flags.height) / double(global_flags.width));
 932         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 933
 934         ui->vertical_layout->setStretch(0, lrintf(me_height));
 935         ui->vertical_layout->setStretch(1,
 936                 lrintf(compact_label_height) +
 937                 lrintf(remaining_height) +
 938                 lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
 939
 940         ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
 941         ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
 942         ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
 943
 944         // Set the widths for the previews.
 945         double preview_width = preview_height * double(global_flags.width) / double(global_flags.height);
 946         for (unsigned i = 0; i < previews.size(); ++i) {
 947                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 948         }
 949
 950         // The preview horizontal spacer.
 951         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 952         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 953 }
 954
 955 void MainWindow::set_locut(float value)
 956 {
 957         set_relative_value(ui->locut_cutoff_knob, value);
 958 }
 959
 960 void MainWindow::set_limiter_threshold(float value)
 961 {
 962         set_relative_value(ui->limiter_threshold_knob, value);
 963 }
 964
 965 void MainWindow::set_makeup_gain(float value)
 966 {
 967         set_relative_value(ui->makeup_gain_knob, value);
 968 }
 969
 970 void MainWindow::set_treble(unsigned bus_idx, float value)
 971 {
 972         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, value);
 973 }
 974
 975 void MainWindow::set_mid(unsigned bus_idx, float value)
 976 {
 977         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, value);
 978 }
 979
 980 void MainWindow::set_bass(unsigned bus_idx, float value)
 981 {
 982         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, value);
 983 }
 984
 985 void MainWindow::set_gain(unsigned bus_idx, float value)
 986 {
 987         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, value);
 988 }
 989
 990 void MainWindow::set_compressor_threshold(unsigned bus_idx, float value)
 991 {
 992         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, value);
 993 }
 994
 995 void MainWindow::set_fader(unsigned bus_idx, float value)
 996 {
 997         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::fader, value);
 998 }
 999
1000 void MainWindow::toggle_mute(unsigned bus_idx)
1001 {
1002         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button);
1003 }
1004
1005 void MainWindow::toggle_locut(unsigned bus_idx)
1006 {
1007         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled);
1008 }
1009
1010 void MainWindow::toggle_auto_gain_staging(unsigned bus_idx)
1011 {
1012         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox);
1013 }
1014
1015 void MainWindow::toggle_compressor(unsigned bus_idx)
1016 {
1017         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled);
1018 }
1019
1020 void MainWindow::clear_peak(unsigned bus_idx)
1021 {
1022         post_to_main_thread([=]{
1023                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1024                         global_audio_mixer->reset_peak(bus_idx);
1025                         midi_mapper.set_has_peaked(bus_idx, false);
1026                         midi_mapper.refresh_lights();
1027                 }
1028         });
1029 }
1030
1031 void MainWindow::clear_all_highlights()
1032 {
1033         post_to_main_thread([this]{
1034                 highlight_locut(false);
1035                 highlight_limiter_threshold(false);
1036                 highlight_makeup_gain(false);
1037                 highlight_toggle_limiter(false);
1038                 highlight_toggle_auto_makeup_gain(false);
1039                 for (unsigned bus_idx = 0; bus_idx < audio_expanded_views.size(); ++bus_idx) {
1040                         highlight_treble(bus_idx, false);
1041                         highlight_mid(bus_idx, false);
1042                         highlight_bass(bus_idx, false);
1043                         highlight_gain(bus_idx, false);
1044                         highlight_compressor_threshold(bus_idx, false);
1045                         highlight_fader(bus_idx, false);
1046                         highlight_mute(bus_idx, false);
1047                         highlight_toggle_locut(bus_idx, false);
1048                         highlight_toggle_auto_gain_staging(bus_idx, false);
1049                         highlight_toggle_compressor(bus_idx, false);
1050                 }
1051         });
1052 }
1053
1054 void MainWindow::toggle_limiter()
1055 {
1056         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1057                 ui->limiter_enabled->click();
1058         }
1059 }
1060
1061 void MainWindow::toggle_auto_makeup_gain()
1062 {
1063         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1064                 ui->makeup_gain_auto_checkbox->click();
1065         }
1066 }
1067
1068 void MainWindow::highlight_locut(bool highlight)
1069 {
1070         post_to_main_thread([this, highlight]{
1071                 highlight_control(ui->locut_cutoff_knob, highlight);
1072                 highlight_control(ui->locut_cutoff_knob_2, highlight);
1073         });
1074 }
1075
1076 void MainWindow::highlight_limiter_threshold(bool highlight)
1077 {
1078         post_to_main_thread([this, highlight]{
1079                 highlight_control(ui->limiter_threshold_knob, highlight);
1080                 highlight_control(ui->limiter_threshold_knob_2, highlight);
1081         });
1082 }
1083
1084 void MainWindow::highlight_makeup_gain(bool highlight)
1085 {
1086         post_to_main_thread([this, highlight]{
1087                 highlight_control(ui->makeup_gain_knob, highlight);
1088                 highlight_control(ui->makeup_gain_knob_2, highlight);
1089         });
1090 }
1091
1092 void MainWindow::highlight_treble(unsigned bus_idx, bool highlight)
1093 {
1094         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, highlight);
1095 }
1096
1097 void MainWindow::highlight_mid(unsigned bus_idx, bool highlight)
1098 {
1099         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, highlight);
1100 }
1101
1102 void MainWindow::highlight_bass(unsigned bus_idx, bool highlight)
1103 {
1104         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, highlight);
1105 }
1106
1107 void MainWindow::highlight_gain(unsigned bus_idx, bool highlight)
1108 {
1109         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, highlight);
1110 }
1111
1112 void MainWindow::highlight_compressor_threshold(unsigned bus_idx, bool highlight)
1113 {
1114         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, highlight);
1115 }
1116
1117 void MainWindow::highlight_fader(unsigned bus_idx, bool highlight)
1118 {
1119         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::fader, highlight);
1120 }
1121
1122 void MainWindow::highlight_mute(unsigned bus_idx, bool highlight)
1123 {
1124         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button, highlight, /*is_mute_btton=*/true);
1125 }
1126
1127 void MainWindow::highlight_toggle_locut(unsigned bus_idx, bool highlight)
1128 {
1129         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled, highlight);
1130 }
1131
1132 void MainWindow::highlight_toggle_auto_gain_staging(unsigned bus_idx, bool highlight)
1133 {
1134         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox, highlight);
1135 }
1136
1137 void MainWindow::highlight_toggle_compressor(unsigned bus_idx, bool highlight)
1138 {
1139         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled, highlight);
1140 }
1141
1142 void MainWindow::highlight_toggle_limiter(bool highlight)
1143 {
1144         post_to_main_thread([this, highlight]{
1145                 highlight_control(ui->limiter_enabled, highlight);
1146                 highlight_control(ui->limiter_enabled_2, highlight);
1147         });
1148 }
1149
1150 void MainWindow::highlight_toggle_auto_makeup_gain(bool highlight)
1151 {
1152         post_to_main_thread([this, highlight]{
1153                 highlight_control(ui->makeup_gain_auto_checkbox, highlight);
1154                 highlight_control(ui->makeup_gain_auto_checkbox_2, highlight);
1155         });
1156 }
1157
1158 template<class T>
1159 void MainWindow::set_relative_value(T *control, float value)
1160 {
1161         post_to_main_thread([control, value]{
1162                 control->setValue(lrintf(control->minimum() + value * (control->maximum() - control->minimum())));
1163         });
1164 }
1165
1166 template<class T>
1167 void MainWindow::set_relative_value_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), float value)
1168 {
1169         if (global_audio_mixer != nullptr &&
1170             global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1171             bus_idx < audio_expanded_views.size()) {
1172                 set_relative_value(audio_expanded_views[bus_idx]->*control, value);
1173         }
1174 }
1175
1176 template<class T>
1177 void MainWindow::click_button_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control))
1178 {
1179         post_to_main_thread([this, bus_idx, control]{
1180                 if (global_audio_mixer != nullptr &&
1181                     global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1182                     bus_idx < audio_expanded_views.size()) {
1183                         (audio_expanded_views[bus_idx]->*control)->click();
1184                 }
1185         });
1186 }
1187
1188 template<class T>
1189 void MainWindow::highlight_control(T *control, bool highlight)
1190 {
1191         if (control == nullptr) {
1192                 return;
1193         }
1194         if (global_audio_mixer == nullptr ||
1195             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1196                 highlight = false;
1197         }
1198         if (highlight) {
1199                 control->setStyleSheet("background: rgb(0,255,0,80)");
1200         } else {
1201                 control->setStyleSheet("");
1202         }
1203 }
1204
1205 template<class T>
1206 void MainWindow::highlight_mute_control(T *control, bool highlight)
1207 {
1208         if (control == nullptr) {
1209                 return;
1210         }
1211         if (global_audio_mixer == nullptr ||
1212             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1213                 highlight = false;
1214         }
1215         if (highlight) {
1216                 control->setStyleSheet("QPushButton { background: rgb(0,255,0,80); } QPushButton:checked { background: rgba(255,80,0,140); }");
1217         } else {
1218                 control->setStyleSheet("QPushButton:checked { background: rgba(255,0,0,80); }");
1219         }
1220 }
1221
1222 template<class T>
1223 void MainWindow::highlight_control_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), bool highlight, bool is_mute_button)
1224 {
1225         post_to_main_thread([this, bus_idx, control, highlight, is_mute_button]{
1226                 if (bus_idx < audio_expanded_views.size()) {
1227                         if (is_mute_button) {
1228                                 highlight_mute_control(audio_expanded_views[bus_idx]->*control, highlight);
1229                         } else {
1230                                 highlight_control(audio_expanded_views[bus_idx]->*control, highlight);
1231                         }
1232                 }
1233         });
1234 }
1235
1236 void MainWindow::set_transition_names(vector<string> transition_names)
1237 {
1238         if (transition_names.size() < 1 || transition_names[0].empty()) {
1239                 transition_btn1->setText(QString(""));
1240         } else {
1241                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
1242                 ui->transition_btn1->setShortcut(QKeySequence("J"));
1243         }
1244         if (transition_names.size() < 2 || transition_names[1].empty()) {
1245                 transition_btn2->setText(QString(""));
1246         } else {
1247                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
1248                 ui->transition_btn2->setShortcut(QKeySequence("K"));
1249         }
1250         if (transition_names.size() < 3 || transition_names[2].empty()) {
1251                 transition_btn3->setText(QString(""));
1252         } else {
1253                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
1254                 ui->transition_btn3->setShortcut(QKeySequence("L"));
1255         }
1256 }
1257
1258 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
1259 {
1260         if (output >= Mixer::OUTPUT_INPUT0) {
1261                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1262                 previews[channel]->label->setText(name.c_str());
1263         }
1264
1265         analyzer->update_channel_name(output, name);
1266 }
1267
1268 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
1269 {
1270         if (output >= Mixer::OUTPUT_INPUT0) {
1271                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1272                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
1273         }
1274 }
1275
1276 void MainWindow::transition_clicked(int transition_number)
1277 {
1278         global_mixer->transition_clicked(transition_number);
1279 }
1280
1281 void MainWindow::channel_clicked(int channel_number)
1282 {
1283         if (current_wb_pick_display == channel_number) {
1284                 // The picking was already done from eventFilter(), since we don't get
1285                 // the mouse pointer here.
1286         } else {
1287                 global_mixer->channel_clicked(channel_number);
1288         }
1289 }
1290
1291 void MainWindow::quick_cut_activated(int channel_number)
1292 {
1293         global_mixer->channel_clicked(channel_number);
1294         global_mixer->transition_clicked(0);
1295 }
1296
1297 void MainWindow::wb_button_clicked(int channel_number)
1298 {
1299         current_wb_pick_display = channel_number;
1300         QApplication::setOverrideCursor(Qt::CrossCursor);
1301 }
1302
1303 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
1304 {
1305         if (current_wb_pick_display != -1 &&
1306             event->type() == QEvent::MouseButtonRelease &&
1307             watched->isWidgetType()) {
1308                 QApplication::restoreOverrideCursor();
1309                 if (watched == previews[current_wb_pick_display]->display) {
1310                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
1311                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
1312                 } else {
1313                         // The user clicked on something else, give up.
1314                         // (The click goes through, which might not be ideal, but, yes.)
1315                         current_wb_pick_display = -1;
1316                 }
1317         }
1318         return false;
1319 }
1320
1321 void MainWindow::closeEvent(QCloseEvent *event)
1322 {
1323         analyzer->hide();
1324         event->accept();
1325 }
1326
1327 namespace {
1328
1329 double srgb_to_linear(double x)
1330 {
1331         if (x < 0.04045) {
1332                 return x / 12.92;
1333         } else {
1334                 return pow((x + 0.055) / 1.055, 2.4);
1335         }
1336 }
1337
1338 }  // namespace
1339
1340 void MainWindow::set_white_balance(int channel_number, int x, int y)
1341 {
1342         // Set the white balance to neutral for the grab. It's probably going to
1343         // flicker a bit, but hopefully this display is not live anyway.
1344         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
1345         previews[channel_number]->display->updateGL();
1346         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
1347
1348         double r = srgb_to_linear(qRed(reference_color) / 255.0);
1349         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
1350         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
1351         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
1352         previews[channel_number]->display->updateGL();
1353 }
1354
1355 void MainWindow::audio_state_changed()
1356 {
1357         post_to_main_thread([this]{
1358                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
1359                         return;
1360                 }
1361                 InputMapping mapping = global_audio_mixer->get_input_mapping();
1362                 for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
1363                         const InputMapping::Bus &bus = mapping.buses[bus_index];
1364                         string suffix;
1365                         if (bus.device.type == InputSourceType::ALSA_INPUT) {
1366                                 ALSAPool::Device::State state = global_audio_mixer->get_alsa_card_state(bus.device.index);
1367                                 if (state == ALSAPool::Device::State::STARTING) {
1368                                         suffix = " (busy)";
1369                                 } else if (state == ALSAPool::Device::State::DEAD) {
1370                                         suffix = " (dead)";
1371                                 }
1372                         }
1373
1374                         audio_miniviews[bus_index]->bus_desc_label->setFullText(
1375                                 QString::fromStdString(bus.name + suffix));
1376                         audio_expanded_views[bus_index]->bus_desc_label->setFullText(
1377                                 QString::fromStdString(bus.name + suffix));
1378                 }
1379         });
1380 }