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