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