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, 2));
 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, 2));
 246         connect(ui->video_grid_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 247         connect(ui->video_grid_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 248
 249         // And bind the same to PgUp/PgDown.
 250         auto prev_page = [this]{
 251                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 252                         ui->audio_views->setCurrentIndex((ui->audio_views->currentIndex() + 2) % 3);
 253                 }
 254         };
 255         auto next_page = [this]{
 256                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 257                         ui->audio_views->setCurrentIndex((ui->audio_views->currentIndex() + 1) % 3);
 258                 }
 259         };
 260         connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, next_page);
 261         connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, prev_page);
 262
 263         // When the audio view changes, move the previews.
 264         connect(ui->audio_views, &QStackedWidget::currentChanged, bind(&MainWindow::audio_view_changed, this, _1));
 265
 266         if (global_flags.enable_quick_cut_keys) {
 267                 ui->quick_cut_enable_action->setChecked(true);
 268         }
 269         connect(ui->quick_cut_enable_action, &QAction::changed, [this](){
 270                 global_flags.enable_quick_cut_keys = ui->quick_cut_enable_action->isChecked();
 271         });
 272
 273         last_audio_level_callback = steady_clock::now() - seconds(1);
 274
 275         if (!global_flags.midi_mapping_filename.empty()) {
 276                 MIDIMappingProto midi_mapping;
 277                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
 278                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
 279                                 global_flags.midi_mapping_filename.c_str());
 280                         exit(1);
 281                 }
 282                 midi_mapper.set_midi_mapping(midi_mapping);
 283         }
 284         midi_mapper.refresh_highlights();
 285         midi_mapper.refresh_lights();
 286 }
 287
 288 void MainWindow::resizeEvent(QResizeEvent* event)
 289 {
 290         QMainWindow::resizeEvent(event);
 291
 292         // Ask for a relayout, but only after the event loop is done doing relayout
 293         // on everything else.
 294         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 295 }
 296
 297 void MainWindow::mixer_created(Mixer *mixer)
 298 {
 299         // Make the previews.
 300         unsigned num_previews = mixer->get_num_channels();
 301
 302         const char qwerty[] = "QWERTYUIOP";
 303         for (unsigned i = 0; i < num_previews; ++i) {
 304                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 305
 306                 QWidget *preview = new QWidget(this);  // Will be connected to a layout immediately after the loop.
 307                 Ui::Display *ui_display = new Ui::Display;
 308                 ui_display->setupUi(preview);
 309                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 310                 ui_display->display->set_output(output);
 311                 previews.push_back(ui_display);
 312
 313                 // Hook up the click.
 314                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 315
 316                 // Let the theme update the text whenever the resolution or color changed.
 317                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 318                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 319
 320                 // Hook up the keyboard key.
 321                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 322                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 323
 324                 // Hook up the quick-cut key.
 325                 if (i < strlen(qwerty)) {
 326                         QShortcut *shortcut = new QShortcut(QKeySequence(qwerty[i]), this);
 327                         connect(shortcut, &QShortcut::activated, bind(&MainWindow::quick_cut_activated, this, i));
 328                 }
 329
 330                 // Hook up the white balance button (irrelevant if invisible).
 331                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 332                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 333         }
 334
 335         // Connect the previews to the correct layout.
 336         audio_view_changed(ui->audio_views->currentIndex());
 337
 338         global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
 339
 340         slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
 341         slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
 342         slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
 343         slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
 344         slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
 345
 346         reset_audio_mapping_ui();
 347
 348         // TODO: Fetch all of the values these for completeness,
 349         // not just the enable knobs implied by flags.
 350         ui->limiter_enabled->setChecked(global_audio_mixer->get_limiter_enabled());
 351         ui->makeup_gain_auto_checkbox->setChecked(global_audio_mixer->get_final_makeup_gain_auto());
 352
 353         // Controls used only for simple audio fetch their state from the first bus.
 354         constexpr unsigned simple_bus_index = 0;
 355         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 356                 ui->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(simple_bus_index));
 357                 ui->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(simple_bus_index));
 358                 ui->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(simple_bus_index));
 359                 ui->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(simple_bus_index));
 360                 ui->compressor_threshold_db_display->setText(
 361                         QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(simple_bus_index), DB_WITH_SIGN)));
 362         }
 363         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 364                 global_audio_mixer->set_locut_enabled(simple_bus_index, state == Qt::Checked);
 365                 midi_mapper.refresh_lights();
 366         });
 367         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged,
 368                 bind(&MainWindow::gain_staging_knob_changed, this, simple_bus_index, _1));
 369         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 370                 global_audio_mixer->set_gain_staging_auto(simple_bus_index, state == Qt::Checked);
 371                 midi_mapper.refresh_lights();
 372         });
 373         connect(ui->compressor_threshold_knob, &QDial::valueChanged,
 374                 bind(&MainWindow::compressor_threshold_knob_changed, this, simple_bus_index, _1));
 375         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
 376                 global_audio_mixer->set_compressor_enabled(simple_bus_index, state == Qt::Checked);
 377                 midi_mapper.refresh_lights();
 378         });
 379
 380         // Global mastering controls.
 381         QString limiter_threshold_label(
 382                 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
 383         ui->limiter_threshold_db_display->setText(limiter_threshold_label);
 384         ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
 385
 386         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 387         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 388
 389         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 390         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 391                 global_audio_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 392                 midi_mapper.refresh_lights();
 393         });
 394
 395         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 396         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 397                 global_audio_mixer->set_limiter_enabled(state == Qt::Checked);
 398                 midi_mapper.refresh_lights();
 399         });
 400         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 401         // Even though we have a reset button right next to it, the fact that
 402         // the expanded audio view labels are clickable makes it natural to
 403         // click this one as well.
 404         connect(ui->peak_display, &ClickableLabel::clicked, this, &MainWindow::reset_meters_button_clicked);
 405         mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 406
 407         midi_mapper.refresh_highlights();
 408         midi_mapper.refresh_lights();
 409         midi_mapper.start_thread();
 410
 411         analyzer.reset(new Analyzer);
 412
 413         struct sigaction act;
 414         memset(&act, 0, sizeof(act));
 415         act.sa_handler = schedule_cut_signal;
 416         act.sa_flags = SA_RESTART;
 417         sigaction(SIGHUP, &act, nullptr);
 418
 419         // Mostly for debugging. Don't override SIGINT, that's so evil if
 420         // shutdown isn't instant.
 421         memset(&act, 0, sizeof(act));
 422         act.sa_handler = quit_signal;
 423         act.sa_flags = SA_RESTART;
 424         sigaction(SIGUSR1, &act, nullptr);
 425 }
 426
 427 void MainWindow::reset_audio_mapping_ui()
 428 {
 429         bool simple = (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE);
 430
 431         ui->simple_audio_mode->setChecked(simple);
 432         ui->multichannel_audio_mode->setChecked(!simple);
 433         ui->input_mapping_action->setEnabled(!simple);
 434         ui->midi_mapping_action->setEnabled(!simple);
 435
 436         ui->locut_enabled->setVisible(simple);
 437         ui->gainstaging_label->setVisible(simple);
 438         ui->gainstaging_knob->setVisible(simple);
 439         ui->gainstaging_db_display->setVisible(simple);
 440         ui->gainstaging_auto_checkbox->setVisible(simple);
 441         ui->compressor_threshold_label->setVisible(simple);
 442         ui->compressor_threshold_knob->setVisible(simple);
 443         ui->compressor_threshold_db_display->setVisible(simple);
 444         ui->compressor_enabled->setVisible(simple);
 445
 446         setup_audio_miniview();
 447         setup_audio_expanded_view();
 448
 449         if (simple) {
 450                 ui->audio_views->setCurrentIndex(0);
 451         }
 452         ui->compact_header->setVisible(!simple);
 453
 454         midi_mapper.refresh_highlights();
 455         midi_mapper.refresh_lights();
 456 }
 457
 458 void MainWindow::setup_audio_miniview()
 459 {
 460         // Remove any existing channels.
 461         for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
 462                 delete item->widget();
 463                 delete item;
 464         }
 465         audio_miniviews.clear();
 466
 467         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 468                 return;
 469         }
 470
 471         // Set up brand new ones from the input mapping.
 472         InputMapping mapping = global_audio_mixer->get_input_mapping();
 473         audio_miniviews.resize(mapping.buses.size());
 474         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 475                 QWidget *channel = new QWidget(this);
 476                 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
 477                 ui_audio_miniview->setupUi(channel);
 478                 ui_audio_miniview->bus_desc_label->setFullText(
 479                         QString::fromStdString(mapping.buses[bus_index].name));
 480                 audio_miniviews[bus_index] = ui_audio_miniview;
 481
 482                 // Set up the peak meter.
 483                 VUMeter *peak_meter = ui_audio_miniview->peak_meter;
 484                 peak_meter->set_min_level(-30.0f);
 485                 peak_meter->set_max_level(0.0f);
 486                 peak_meter->set_ref_level(0.0f);
 487
 488                 ui_audio_miniview->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 489
 490                 ui->faders->addWidget(channel);
 491
 492                 connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
 493                         bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
 494                 connect(ui_audio_miniview->peak_display_label, &ClickableLabel::clicked,
 495                         [bus_index]() {
 496                                 global_audio_mixer->reset_peak(bus_index);
 497                         });
 498         }
 499 }
 500
 501 void MainWindow::setup_audio_expanded_view()
 502 {
 503         // Remove any existing channels.
 504         for (QLayoutItem *item; (item = ui->buses->takeAt(0)) != nullptr; ) {
 505                 delete item->widget();
 506                 delete item;
 507         }
 508         audio_expanded_views.clear();
 509
 510         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 511                 return;
 512         }
 513
 514         // Set up brand new ones from the input mapping.
 515         InputMapping mapping = global_audio_mixer->get_input_mapping();
 516         audio_expanded_views.resize(mapping.buses.size());
 517         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 518                 QWidget *channel = new QWidget(this);
 519                 Ui::AudioExpandedView *ui_audio_expanded_view = new Ui::AudioExpandedView;
 520                 ui_audio_expanded_view->setupUi(channel);
 521                 ui_audio_expanded_view->bus_desc_label->setFullText(
 522                         QString::fromStdString(mapping.buses[bus_index].name));
 523                 audio_expanded_views[bus_index] = ui_audio_expanded_view;
 524                 update_eq_label(bus_index, EQ_BAND_TREBLE, global_audio_mixer->get_eq(bus_index, EQ_BAND_TREBLE));
 525                 update_eq_label(bus_index, EQ_BAND_MID, global_audio_mixer->get_eq(bus_index, EQ_BAND_MID));
 526                 update_eq_label(bus_index, EQ_BAND_BASS, global_audio_mixer->get_eq(bus_index, EQ_BAND_BASS));
 527                 ui_audio_expanded_view->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 528                 ui_audio_expanded_view->mute_button->setChecked(global_audio_mixer->get_mute(bus_index));
 529                 connect(ui_audio_expanded_view->mute_button, &QPushButton::toggled,
 530                         bind(&MainWindow::mute_button_toggled, this, bus_index, _1));
 531                 ui->buses->addWidget(channel);
 532
 533                 ui_audio_expanded_view->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(bus_index));
 534                 connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 535                         global_audio_mixer->set_locut_enabled(bus_index, state == Qt::Checked);
 536                         midi_mapper.refresh_lights();
 537                 });
 538
 539                 connect(ui_audio_expanded_view->treble_knob, &QDial::valueChanged,
 540                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_TREBLE, _1));
 541                 connect(ui_audio_expanded_view->mid_knob, &QDial::valueChanged,
 542                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_MID, _1));
 543                 connect(ui_audio_expanded_view->bass_knob, &QDial::valueChanged,
 544                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_BASS, _1));
 545
 546                 ui_audio_expanded_view->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(bus_index));
 547                 ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(bus_index));
 548                 ui_audio_expanded_view->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(bus_index));
 549
 550                 connect(ui_audio_expanded_view->gainstaging_knob, &QAbstractSlider::valueChanged, bind(&MainWindow::gain_staging_knob_changed, this, bus_index, _1));
 551                 connect(ui_audio_expanded_view->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, bus_index](int state){
 552                         global_audio_mixer->set_gain_staging_auto(bus_index, state == Qt::Checked);
 553                         midi_mapper.refresh_lights();
 554                 });
 555
 556                 connect(ui_audio_expanded_view->compressor_threshold_knob, &QDial::valueChanged, bind(&MainWindow::compressor_threshold_knob_changed, this, bus_index, _1));
 557                 connect(ui_audio_expanded_view->compressor_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 558                         global_audio_mixer->set_compressor_enabled(bus_index, state == Qt::Checked);
 559                         midi_mapper.refresh_lights();
 560                 });
 561
 562                 slave_fader(audio_miniviews[bus_index]->fader, ui_audio_expanded_view->fader);
 563
 564                 // Set up the peak meter.
 565                 VUMeter *peak_meter = ui_audio_expanded_view->peak_meter;
 566                 peak_meter->set_min_level(-30.0f);
 567                 peak_meter->set_max_level(0.0f);
 568                 peak_meter->set_ref_level(0.0f);
 569
 570                 connect(ui_audio_expanded_view->peak_display_label, &ClickableLabel::clicked,
 571                         [this, bus_index]() {
 572                                 global_audio_mixer->reset_peak(bus_index);
 573                                 midi_mapper.refresh_lights();
 574                         });
 575         }
 576
 577         update_cutoff_labels(global_audio_mixer->get_locut_cutoff());
 578 }
 579
 580 void MainWindow::mixer_shutting_down()
 581 {
 582         ui->me_live->shutdown();
 583         ui->me_preview->shutdown();
 584
 585         for (Ui::Display *display : previews) {
 586                 display->display->shutdown();
 587         }
 588
 589         analyzer->mixer_shutting_down();
 590 }
 591
 592 void MainWindow::cut_triggered()
 593 {
 594         global_mixer->schedule_cut();
 595 }
 596
 597 void MainWindow::x264_bitrate_triggered()
 598 {
 599         bool ok;
 600         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);
 601         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 602                 global_flags.x264_bitrate = new_bitrate;
 603                 global_mixer->change_x264_bitrate(new_bitrate);
 604         }
 605 }
 606
 607 void MainWindow::exit_triggered()
 608 {
 609         close();
 610 }
 611
 612 void MainWindow::manual_triggered()
 613 {
 614         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
 615                 QMessageBox msgbox;
 616                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
 617                 msgbox.exec();
 618         }
 619 }
 620
 621 void MainWindow::about_triggered()
 622 {
 623         AboutDialog().exec();
 624 }
 625
 626 void MainWindow::open_analyzer_triggered()
 627 {
 628         analyzer->show();
 629 }
 630
 631 void MainWindow::simple_audio_mode_triggered()
 632 {
 633         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
 634                 return;
 635         }
 636         unsigned card_index = global_audio_mixer->get_simple_input();
 637         if (card_index == numeric_limits<unsigned>::max()) {
 638                 QMessageBox::StandardButton reply =
 639                         QMessageBox::question(this,
 640                                 "Mapping too complex",
 641                                 "The current audio mapping is too complicated to be representable in simple mode, "
 642                                         "and will be discarded if you proceed. Really go to simple audio mode?",
 643                                 QMessageBox::Yes | QMessageBox::No);
 644                 if (reply == QMessageBox::No) {
 645                         ui->simple_audio_mode->setChecked(false);
 646                         ui->multichannel_audio_mode->setChecked(true);
 647                         return;
 648                 }
 649                 card_index = 0;
 650         }
 651         global_audio_mixer->set_simple_input(/*card_index=*/card_index);
 652         reset_audio_mapping_ui();
 653 }
 654
 655 void MainWindow::multichannel_audio_mode_triggered()
 656 {
 657         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
 658                 return;
 659         }
 660
 661         // Take the generated input mapping from the simple input,
 662         // and set it as a normal multichannel mapping, which causes
 663         // the mode to go to multichannel.
 664         global_audio_mixer->set_input_mapping(global_audio_mixer->get_input_mapping());
 665         reset_audio_mapping_ui();
 666 }
 667
 668 void MainWindow::input_mapping_triggered()
 669 {
 670         if (InputMappingDialog().exec() == QDialog::Accepted) {
 671                 setup_audio_miniview();
 672                 setup_audio_expanded_view();
 673         }
 674         midi_mapper.refresh_highlights();
 675         midi_mapper.refresh_lights();
 676 }
 677
 678 void MainWindow::midi_mapping_triggered()
 679 {
 680         MIDIMappingDialog(&midi_mapper).exec();
 681 }
 682
 683 void MainWindow::timecode_stream_triggered()
 684 {
 685         global_mixer->set_display_timecode_in_stream(ui->timecode_stream_action->isChecked());
 686 }
 687
 688 void MainWindow::timecode_stdout_triggered()
 689 {
 690         global_mixer->set_display_timecode_on_stdout(ui->timecode_stdout_action->isChecked());
 691 }
 692
 693 void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
 694 {
 695         if (bus_index == 0) {
 696                 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 697         }
 698         if (bus_index < audio_expanded_views.size()) {
 699                 audio_expanded_views[bus_index]->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 700         }
 701
 702         float gain_db = value * 0.1f;
 703         global_audio_mixer->set_gain_staging_db(bus_index, gain_db);
 704
 705         // The label will be updated by the audio level callback.
 706 }
 707
 708 void MainWindow::final_makeup_gain_knob_changed(int value)
 709 {
 710         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 711
 712         float gain_db = value * 0.1f;
 713         global_audio_mixer->set_final_makeup_gain_db(gain_db);
 714
 715         // The label will be updated by the audio level callback.
 716 }
 717
 718 void MainWindow::cutoff_knob_changed(int value)
 719 {
 720         float octaves = value * 0.1f;
 721         float cutoff_hz = 20.0 * pow(2.0, octaves);
 722         global_audio_mixer->set_locut_cutoff(cutoff_hz);
 723         update_cutoff_labels(cutoff_hz);
 724 }
 725
 726 void MainWindow::update_cutoff_labels(float cutoff_hz)
 727 {
 728         char buf[256];
 729         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 730         ui->locut_cutoff_display->setText(buf);
 731         ui->locut_cutoff_display_2->setText(buf);
 732
 733         for (unsigned bus_index = 0; bus_index < audio_expanded_views.size(); ++bus_index) {
 734                 audio_expanded_views[bus_index]->locut_enabled->setText(
 735                         QString("Lo-cut: ") + buf);
 736         }
 737 }
 738
 739 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 740 {
 741         char time_str[256];
 742         if (estimated_seconds_left < 60.0) {
 743                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 744         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 745                 int s = lrintf(estimated_seconds_left);
 746                 int m = s / 60;
 747                 s %= 60;
 748                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 749         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 750                 int m = lrintf(estimated_seconds_left / 60.0);
 751                 snprintf(time_str, sizeof(time_str), "%dm", m);
 752         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 753                 int m = lrintf(estimated_seconds_left / 60.0);
 754                 int h = m / 60;
 755                 m %= 60;
 756                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 757         } else {  // More than ten hours: Xh.
 758                 int h = lrintf(estimated_seconds_left / 3600.0);
 759                 snprintf(time_str, sizeof(time_str), "%dh", h);
 760         }
 761         char buf[256];
 762         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 763
 764         std::string label = buf;
 765
 766         post_to_main_thread([this, label]{
 767                 disk_free_label->setText(QString::fromStdString(label));
 768                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 769         });
 770 }
 771
 772 void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
 773 {
 774         float gain_db = value * 0.1f;
 775         global_audio_mixer->set_eq(bus_index, band, gain_db);
 776
 777         update_eq_label(bus_index, band, gain_db);
 778 }
 779
 780 void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
 781 {
 782         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 783         string db_string = format_db(gain_db, DB_WITH_SIGN);
 784         switch (band) {
 785         case EQ_BAND_TREBLE:
 786                 view->treble_label->setText(QString::fromStdString("Treble: " + db_string));
 787                 break;
 788         case EQ_BAND_MID:
 789                 view->mid_label->setText(QString::fromStdString("Mid: " + db_string));
 790                 break;
 791         case EQ_BAND_BASS:
 792                 view->bass_label->setText(QString::fromStdString("Bass: " + db_string));
 793                 break;
 794         default:
 795                 assert(false);
 796         }
 797 }
 798
 799 void MainWindow::limiter_threshold_knob_changed(int value)
 800 {
 801         float threshold_dbfs = value * 0.1f;
 802         global_audio_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 803         ui->limiter_threshold_db_display->setText(
 804                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 805         ui->limiter_threshold_db_display_2->setText(
 806                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 807 }
 808
 809 void MainWindow::compressor_threshold_knob_changed(unsigned bus_index, int value)
 810 {
 811         float threshold_dbfs = value * 0.1f;
 812         global_audio_mixer->set_compressor_threshold_dbfs(bus_index, threshold_dbfs);
 813
 814         QString label(QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 815         if (bus_index == 0) {
 816                 ui->compressor_threshold_db_display->setText(label);
 817         }
 818         if (bus_index < audio_expanded_views.size()) {
 819                 audio_expanded_views[bus_index]->compressor_threshold_db_display->setText(label);
 820         }
 821 }
 822
 823 void MainWindow::mini_fader_changed(int bus, double volume_db)
 824 {
 825         QString label(QString::fromStdString(format_db(volume_db, DB_WITH_SIGN)));
 826         audio_miniviews[bus]->fader_label->setText(label);
 827         audio_expanded_views[bus]->fader_label->setText(label);
 828
 829         global_audio_mixer->set_fader_volume(bus, volume_db);
 830 }
 831
 832 void MainWindow::mute_button_toggled(int bus, bool checked)
 833 {
 834         global_audio_mixer->set_mute(bus, checked);
 835         midi_mapper.refresh_lights();
 836 }
 837
 838 void MainWindow::reset_meters_button_clicked()
 839 {
 840         global_audio_mixer->reset_meters();
 841         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
 842         ui->peak_display->setStyleSheet("");
 843 }
 844
 845 void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<AudioMixer::BusLevel> bus_levels,
 846                                       float global_level_lufs,
 847                                       float range_low_lufs, float range_high_lufs,
 848                                       float final_makeup_gain_db,
 849                                       float correlation)
 850 {
 851         steady_clock::time_point now = steady_clock::now();
 852
 853         // The meters are somewhat inefficient to update. Only update them
 854         // every 100 ms or so (we get updates every 5–20 ms). Note that this
 855         // means that the digital peak meters are ever so slightly too low
 856         // (each update won't be a faithful representation of the highest peak
 857         // since the previous update, since there are frames we won't draw),
 858         // but the _peak_ of the peak meters will be correct (it's tracked in
 859         // AudioMixer, not here), and that's much more important.
 860         double last_update_age = duration<double>(now - last_audio_level_callback).count();
 861         if (last_update_age < 0.100) {
 862                 return;
 863         }
 864         last_audio_level_callback = now;
 865
 866         post_to_main_thread([=]() {
 867                 ui->vu_meter->set_level(level_lufs);
 868                 for (unsigned bus_index = 0; bus_index < bus_levels.size(); ++bus_index) {
 869                         if (bus_index < audio_miniviews.size()) {
 870                                 const AudioMixer::BusLevel &level = bus_levels[bus_index];
 871                                 Ui::AudioMiniView *miniview = audio_miniviews[bus_index];
 872                                 miniview->peak_meter->set_level(
 873                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 874                                 miniview->peak_meter->set_peak(
 875                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 876                                 set_peak_label(miniview->peak_display_label, level.historic_peak_dbfs);
 877
 878                                 Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 879                                 view->peak_meter->set_level(
 880                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 881                                 view->peak_meter->set_peak(
 882                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 883                                 view->reduction_meter->set_reduction_db(level.compressor_attenuation_db);
 884                                 view->gainstaging_knob->blockSignals(true);
 885                                 view->gainstaging_knob->setValue(lrintf(level.gain_staging_db * 10.0f));
 886                                 view->gainstaging_knob->blockSignals(false);
 887                                 view->gainstaging_db_display->setText(
 888                                         QString("Gain: ") +
 889                                         QString::fromStdString(format_db(level.gain_staging_db, DB_WITH_SIGN)));
 890                                 set_peak_label(view->peak_display_label, level.historic_peak_dbfs);
 891
 892                                 midi_mapper.set_has_peaked(bus_index, level.historic_peak_dbfs >= -0.1f);
 893                         }
 894                 }
 895                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 896                 ui->correlation_meter->set_correlation(correlation);
 897
 898                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 899                 set_peak_label(ui->peak_display, peak_db);
 900
 901                 // NOTE: Will be invisible when using multitrack audio.
 902                 ui->gainstaging_knob->blockSignals(true);
 903                 ui->gainstaging_knob->setValue(lrintf(bus_levels[0].gain_staging_db * 10.0f));
 904                 ui->gainstaging_knob->blockSignals(false);
 905                 ui->gainstaging_db_display->setText(
 906                         QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
 907
 908                 ui->makeup_gain_knob->blockSignals(true);
 909                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 910                 ui->makeup_gain_knob->blockSignals(false);
 911                 ui->makeup_gain_db_display->setText(
 912                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 913                 ui->makeup_gain_db_display_2->setText(
 914                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 915
 916                 // Peak labels could have changed.
 917                 midi_mapper.refresh_lights();
 918         });
 919 }
 920
 921 void MainWindow::relayout()
 922 {
 923         int height = ui->vertical_layout->geometry().height();
 924         if (height <= 0) {
 925                 // Seemingly this can happen and must be ignored.
 926                 return;
 927         }
 928
 929         double remaining_height = height;
 930
 931         // Allocate the height; the most important part is to keep the main displays
 932         // at the right aspect if at all possible.
 933         double me_width = ui->me_preview->width();
 934         double me_height = me_width * double(global_flags.height) / double(global_flags.width) + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 935
 936         // TODO: Scale the widths when we need to do this.
 937         if (me_height / double(height) > 0.8) {
 938                 me_height = height * 0.8;
 939         }
 940         remaining_height -= me_height + ui->vertical_layout->spacing();
 941
 942         // Space between the M/E displays and the audio strip.
 943         remaining_height -= ui->vertical_layout->spacing();
 944
 945         // The label above the audio strip.
 946         double compact_label_height = ui->compact_label->minimumHeight() +
 947                 ui->compact_audio_layout->spacing();
 948         remaining_height -= compact_label_height;
 949
 950         // The previews will be constrained by the remaining height, and the width.
 951         double preview_label_height = previews[0]->label->minimumSize().height() +
 952                 previews[0]->main_vertical_layout->spacing();
 953         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 954         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * double(global_flags.height) / double(global_flags.width));
 955         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 956
 957         ui->vertical_layout->setStretch(0, lrintf(me_height));
 958         ui->vertical_layout->setStretch(1,
 959                 lrintf(compact_label_height) +
 960                 lrintf(remaining_height) +
 961                 lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
 962
 963         ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
 964         ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
 965         ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
 966
 967         if (current_audio_view == 0) {  // Compact audio view.
 968                 // Set the widths for the previews.
 969                 double preview_width = preview_height * double(global_flags.width) / double(global_flags.height);
 970                 for (unsigned i = 0; i < previews.size(); ++i) {
 971                         ui->preview_displays->setStretch(i, lrintf(preview_width));
 972                 }
 973
 974                 // The preview horizontal spacer.
 975                 double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 976                 ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 977         } else if (current_audio_view == 2) {  // Video grid view.
 978                 // QGridLayout doesn't do it for us, since we need to be able to remove rows
 979                 // or columns as the grid changes, and it won't do that. Thus, position everything
 980                 // by hand.
 981                 constexpr int spacing = 6;
 982                 int grid_width = ui->preview_displays_grid->geometry().width();
 983                 int grid_height = ui->preview_displays_grid->geometry().height();
 984                 int best_preview_width = 0;
 985                 unsigned best_num_rows = 1, best_num_cols = 1;
 986                 for (unsigned num_rows = 1; num_rows <= previews.size(); ++num_rows) {
 987                         int num_cols = (previews.size() + num_rows - 1) / num_rows;
 988
 989                         int max_preview_height = (grid_height - spacing * (num_rows - 1)) / num_rows - preview_label_height;
 990                         int max_preview_width = (grid_width - spacing * (num_cols - 1)) / num_cols;
 991                         int preview_width = std::min<int>(max_preview_width, max_preview_height * double(global_flags.width) / double(global_flags.height));
 992
 993                         if (preview_width > best_preview_width) {
 994                                 best_preview_width = preview_width;
 995                                 best_num_rows = num_rows;
 996                                 best_num_cols = num_cols;
 997                         }
 998                 }
 999
1000                 double cell_height = lrintf(best_preview_width * double(global_flags.height) / double(global_flags.width)) + preview_label_height;
1001                 remaining_height = grid_height - best_num_rows * cell_height - (best_num_rows - 1) * spacing;
1002                 int cell_width = best_preview_width;
1003                 int remaining_width = grid_width - best_num_cols * cell_width - (best_num_cols - 1) * spacing;
1004
1005                 for (unsigned i = 0; i < previews.size(); ++i) {
1006                         int col_idx = i % best_num_cols;
1007                         int row_idx = i / best_num_cols;
1008
1009                         double top = remaining_height * 0.5f + row_idx * (cell_height + spacing);
1010                         double bottom = top + cell_height;
1011                         double left = remaining_width * 0.5f + col_idx * (cell_width + spacing);
1012                         double right = left + cell_width;
1013
1014                         QRect rect;
1015                         rect.setTop(lrintf(top));
1016                         rect.setBottom(lrintf(bottom));
1017                         rect.setLeft(lrintf(left));
1018                         rect.setRight(lrintf(right));
1019
1020                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1021                         display->setGeometry(rect);
1022                         display->show();
1023                 }
1024         }
1025 }
1026
1027 void MainWindow::set_locut(float value)
1028 {
1029         set_relative_value(ui->locut_cutoff_knob, value);
1030 }
1031
1032 void MainWindow::set_limiter_threshold(float value)
1033 {
1034         set_relative_value(ui->limiter_threshold_knob, value);
1035 }
1036
1037 void MainWindow::set_makeup_gain(float value)
1038 {
1039         set_relative_value(ui->makeup_gain_knob, value);
1040 }
1041
1042 void MainWindow::set_treble(unsigned bus_idx, float value)
1043 {
1044         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, value);
1045 }
1046
1047 void MainWindow::set_mid(unsigned bus_idx, float value)
1048 {
1049         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, value);
1050 }
1051
1052 void MainWindow::set_bass(unsigned bus_idx, float value)
1053 {
1054         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, value);
1055 }
1056
1057 void MainWindow::set_gain(unsigned bus_idx, float value)
1058 {
1059         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, value);
1060 }
1061
1062 void MainWindow::set_compressor_threshold(unsigned bus_idx, float value)
1063 {
1064         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, value);
1065 }
1066
1067 void MainWindow::set_fader(unsigned bus_idx, float value)
1068 {
1069         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::fader, value);
1070 }
1071
1072 void MainWindow::toggle_mute(unsigned bus_idx)
1073 {
1074         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button);
1075 }
1076
1077 void MainWindow::toggle_locut(unsigned bus_idx)
1078 {
1079         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled);
1080 }
1081
1082 void MainWindow::toggle_auto_gain_staging(unsigned bus_idx)
1083 {
1084         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox);
1085 }
1086
1087 void MainWindow::toggle_compressor(unsigned bus_idx)
1088 {
1089         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled);
1090 }
1091
1092 void MainWindow::clear_peak(unsigned bus_idx)
1093 {
1094         post_to_main_thread([=]{
1095                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1096                         global_audio_mixer->reset_peak(bus_idx);
1097                         midi_mapper.set_has_peaked(bus_idx, false);
1098                         midi_mapper.refresh_lights();
1099                 }
1100         });
1101 }
1102
1103 void MainWindow::clear_all_highlights()
1104 {
1105         post_to_main_thread([this]{
1106                 highlight_locut(false);
1107                 highlight_limiter_threshold(false);
1108                 highlight_makeup_gain(false);
1109                 highlight_toggle_limiter(false);
1110                 highlight_toggle_auto_makeup_gain(false);
1111                 for (unsigned bus_idx = 0; bus_idx < audio_expanded_views.size(); ++bus_idx) {
1112                         highlight_treble(bus_idx, false);
1113                         highlight_mid(bus_idx, false);
1114                         highlight_bass(bus_idx, false);
1115                         highlight_gain(bus_idx, false);
1116                         highlight_compressor_threshold(bus_idx, false);
1117                         highlight_fader(bus_idx, false);
1118                         highlight_mute(bus_idx, false);
1119                         highlight_toggle_locut(bus_idx, false);
1120                         highlight_toggle_auto_gain_staging(bus_idx, false);
1121                         highlight_toggle_compressor(bus_idx, false);
1122                 }
1123         });
1124 }
1125
1126 void MainWindow::toggle_limiter()
1127 {
1128         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1129                 ui->limiter_enabled->click();
1130         }
1131 }
1132
1133 void MainWindow::toggle_auto_makeup_gain()
1134 {
1135         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1136                 ui->makeup_gain_auto_checkbox->click();
1137         }
1138 }
1139
1140 void MainWindow::highlight_locut(bool highlight)
1141 {
1142         post_to_main_thread([this, highlight]{
1143                 highlight_control(ui->locut_cutoff_knob, highlight);
1144                 highlight_control(ui->locut_cutoff_knob_2, highlight);
1145         });
1146 }
1147
1148 void MainWindow::highlight_limiter_threshold(bool highlight)
1149 {
1150         post_to_main_thread([this, highlight]{
1151                 highlight_control(ui->limiter_threshold_knob, highlight);
1152                 highlight_control(ui->limiter_threshold_knob_2, highlight);
1153         });
1154 }
1155
1156 void MainWindow::highlight_makeup_gain(bool highlight)
1157 {
1158         post_to_main_thread([this, highlight]{
1159                 highlight_control(ui->makeup_gain_knob, highlight);
1160                 highlight_control(ui->makeup_gain_knob_2, highlight);
1161         });
1162 }
1163
1164 void MainWindow::highlight_treble(unsigned bus_idx, bool highlight)
1165 {
1166         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, highlight);
1167 }
1168
1169 void MainWindow::highlight_mid(unsigned bus_idx, bool highlight)
1170 {
1171         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, highlight);
1172 }
1173
1174 void MainWindow::highlight_bass(unsigned bus_idx, bool highlight)
1175 {
1176         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, highlight);
1177 }
1178
1179 void MainWindow::highlight_gain(unsigned bus_idx, bool highlight)
1180 {
1181         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, highlight);
1182 }
1183
1184 void MainWindow::highlight_compressor_threshold(unsigned bus_idx, bool highlight)
1185 {
1186         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, highlight);
1187 }
1188
1189 void MainWindow::highlight_fader(unsigned bus_idx, bool highlight)
1190 {
1191         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::fader, highlight);
1192 }
1193
1194 void MainWindow::highlight_mute(unsigned bus_idx, bool highlight)
1195 {
1196         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button, highlight, /*is_mute_btton=*/true);
1197 }
1198
1199 void MainWindow::highlight_toggle_locut(unsigned bus_idx, bool highlight)
1200 {
1201         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled, highlight);
1202 }
1203
1204 void MainWindow::highlight_toggle_auto_gain_staging(unsigned bus_idx, bool highlight)
1205 {
1206         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox, highlight);
1207 }
1208
1209 void MainWindow::highlight_toggle_compressor(unsigned bus_idx, bool highlight)
1210 {
1211         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled, highlight);
1212 }
1213
1214 void MainWindow::highlight_toggle_limiter(bool highlight)
1215 {
1216         post_to_main_thread([this, highlight]{
1217                 highlight_control(ui->limiter_enabled, highlight);
1218                 highlight_control(ui->limiter_enabled_2, highlight);
1219         });
1220 }
1221
1222 void MainWindow::highlight_toggle_auto_makeup_gain(bool highlight)
1223 {
1224         post_to_main_thread([this, highlight]{
1225                 highlight_control(ui->makeup_gain_auto_checkbox, highlight);
1226                 highlight_control(ui->makeup_gain_auto_checkbox_2, highlight);
1227         });
1228 }
1229
1230 template<class T>
1231 void MainWindow::set_relative_value(T *control, float value)
1232 {
1233         post_to_main_thread([control, value]{
1234                 control->setValue(lrintf(control->minimum() + value * (control->maximum() - control->minimum())));
1235         });
1236 }
1237
1238 template<class T>
1239 void MainWindow::set_relative_value_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), float value)
1240 {
1241         if (global_audio_mixer != nullptr &&
1242             global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1243             bus_idx < audio_expanded_views.size()) {
1244                 set_relative_value(audio_expanded_views[bus_idx]->*control, value);
1245         }
1246 }
1247
1248 template<class T>
1249 void MainWindow::click_button_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control))
1250 {
1251         post_to_main_thread([this, bus_idx, control]{
1252                 if (global_audio_mixer != nullptr &&
1253                     global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1254                     bus_idx < audio_expanded_views.size()) {
1255                         (audio_expanded_views[bus_idx]->*control)->click();
1256                 }
1257         });
1258 }
1259
1260 template<class T>
1261 void MainWindow::highlight_control(T *control, bool highlight)
1262 {
1263         if (control == nullptr) {
1264                 return;
1265         }
1266         if (global_audio_mixer == nullptr ||
1267             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1268                 highlight = false;
1269         }
1270         if (highlight) {
1271                 control->setStyleSheet("background: rgb(0,255,0,80)");
1272         } else {
1273                 control->setStyleSheet("");
1274         }
1275 }
1276
1277 template<class T>
1278 void MainWindow::highlight_mute_control(T *control, bool highlight)
1279 {
1280         if (control == nullptr) {
1281                 return;
1282         }
1283         if (global_audio_mixer == nullptr ||
1284             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1285                 highlight = false;
1286         }
1287         if (highlight) {
1288                 control->setStyleSheet("QPushButton { background: rgb(0,255,0,80); } QPushButton:checked { background: rgba(255,80,0,140); }");
1289         } else {
1290                 control->setStyleSheet("QPushButton:checked { background: rgba(255,0,0,80); }");
1291         }
1292 }
1293
1294 template<class T>
1295 void MainWindow::highlight_control_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), bool highlight, bool is_mute_button)
1296 {
1297         post_to_main_thread([this, bus_idx, control, highlight, is_mute_button]{
1298                 if (bus_idx < audio_expanded_views.size()) {
1299                         if (is_mute_button) {
1300                                 highlight_mute_control(audio_expanded_views[bus_idx]->*control, highlight);
1301                         } else {
1302                                 highlight_control(audio_expanded_views[bus_idx]->*control, highlight);
1303                         }
1304                 }
1305         });
1306 }
1307
1308 void MainWindow::set_transition_names(vector<string> transition_names)
1309 {
1310         if (transition_names.size() < 1 || transition_names[0].empty()) {
1311                 transition_btn1->setText(QString(""));
1312         } else {
1313                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
1314                 ui->transition_btn1->setShortcut(QKeySequence("J"));
1315         }
1316         if (transition_names.size() < 2 || transition_names[1].empty()) {
1317                 transition_btn2->setText(QString(""));
1318         } else {
1319                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
1320                 ui->transition_btn2->setShortcut(QKeySequence("K"));
1321         }
1322         if (transition_names.size() < 3 || transition_names[2].empty()) {
1323                 transition_btn3->setText(QString(""));
1324         } else {
1325                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
1326                 ui->transition_btn3->setShortcut(QKeySequence("L"));
1327         }
1328 }
1329
1330 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
1331 {
1332         if (output >= Mixer::OUTPUT_INPUT0) {
1333                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1334                 previews[channel]->label->setText(name.c_str());
1335         }
1336
1337         analyzer->update_channel_name(output, name);
1338 }
1339
1340 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
1341 {
1342         if (output >= Mixer::OUTPUT_INPUT0) {
1343                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1344                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
1345         }
1346 }
1347
1348 void MainWindow::transition_clicked(int transition_number)
1349 {
1350         global_mixer->transition_clicked(transition_number);
1351 }
1352
1353 void MainWindow::channel_clicked(int channel_number)
1354 {
1355         if (current_wb_pick_display == channel_number) {
1356                 // The picking was already done from eventFilter(), since we don't get
1357                 // the mouse pointer here.
1358         } else {
1359                 global_mixer->channel_clicked(channel_number);
1360         }
1361 }
1362
1363 void MainWindow::quick_cut_activated(int channel_number)
1364 {
1365         if (!global_flags.enable_quick_cut_keys) {
1366                 return;
1367         }
1368         global_mixer->channel_clicked(channel_number);
1369         global_mixer->transition_clicked(0);
1370 }
1371
1372 void MainWindow::wb_button_clicked(int channel_number)
1373 {
1374         current_wb_pick_display = channel_number;
1375         QApplication::setOverrideCursor(Qt::CrossCursor);
1376 }
1377
1378 void MainWindow::audio_view_changed(int audio_view)
1379 {
1380         if (audio_view == current_audio_view) {
1381                 return;
1382         }
1383
1384         if (audio_view == 0) {
1385                 // Compact audio view. (1, full audio view, has no video previews.)
1386                 for (unsigned i = 0; i < previews.size(); ++i) {
1387                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1388                         ui->preview_displays->insertWidget(i, display, 1);
1389                 }
1390         } else if (audio_view == 2) {
1391                 // Video grid display.
1392                 for (unsigned i = 0; i < previews.size(); ++i) {
1393                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1394                         display->setParent(ui->preview_displays_grid);
1395                         display->show();
1396                 }
1397         }
1398
1399         current_audio_view = audio_view;
1400
1401         // Ask for a relayout, but only after the event loop is done doing relayout
1402         // on everything else.
1403         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
1404 }
1405
1406 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
1407 {
1408         if (current_wb_pick_display != -1 &&
1409             event->type() == QEvent::MouseButtonRelease &&
1410             watched->isWidgetType()) {
1411                 QApplication::restoreOverrideCursor();
1412                 if (watched == previews[current_wb_pick_display]->display) {
1413                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
1414                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
1415                 } else {
1416                         // The user clicked on something else, give up.
1417                         // (The click goes through, which might not be ideal, but, yes.)
1418                         current_wb_pick_display = -1;
1419                 }
1420         }
1421         return false;
1422 }
1423
1424 void MainWindow::closeEvent(QCloseEvent *event)
1425 {
1426         if (global_mixer->get_num_connected_clients() > 0) {
1427                 QMessageBox::StandardButton reply =
1428                         QMessageBox::question(this, "Nageru", "There are clients connected. Do you really want to quit?",
1429                                 QMessageBox::Yes | QMessageBox::No);
1430                 if (reply != QMessageBox::Yes) {
1431                         event->ignore();
1432                         return;
1433                 }
1434         }
1435
1436         analyzer->hide();
1437         event->accept();
1438 }
1439
1440 namespace {
1441
1442 double srgb_to_linear(double x)
1443 {
1444         if (x < 0.04045) {
1445                 return x / 12.92;
1446         } else {
1447                 return pow((x + 0.055) / 1.055, 2.4);
1448         }
1449 }
1450
1451 }  // namespace
1452
1453 void MainWindow::set_white_balance(int channel_number, int x, int y)
1454 {
1455         // Set the white balance to neutral for the grab. It's probably going to
1456         // flicker a bit, but hopefully this display is not live anyway.
1457         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
1458         previews[channel_number]->display->updateGL();
1459         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
1460
1461         double r = srgb_to_linear(qRed(reference_color) / 255.0);
1462         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
1463         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
1464         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
1465         previews[channel_number]->display->updateGL();
1466 }
1467
1468 void MainWindow::audio_state_changed()
1469 {
1470         post_to_main_thread([this]{
1471                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
1472                         return;
1473                 }
1474                 InputMapping mapping = global_audio_mixer->get_input_mapping();
1475                 for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
1476                         const InputMapping::Bus &bus = mapping.buses[bus_index];
1477                         string suffix;
1478                         if (bus.device.type == InputSourceType::ALSA_INPUT) {
1479                                 ALSAPool::Device::State state = global_audio_mixer->get_alsa_card_state(bus.device.index);
1480                                 if (state == ALSAPool::Device::State::STARTING) {
1481                                         suffix = " (busy)";
1482                                 } else if (state == ALSAPool::Device::State::DEAD) {
1483                                         suffix = " (dead)";
1484                                 }
1485                         }
1486
1487                         audio_miniviews[bus_index]->bus_desc_label->setFullText(
1488                                 QString::fromStdString(bus.name + suffix));
1489                         audio_expanded_views[bus_index]->bus_desc_label->setFullText(
1490                                 QString::fromStdString(bus.name + suffix));
1491                 }
1492         });
1493 }