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