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

   1 #include "mainwindow.h"
   2
   3 #include <math.h>
   4 #include <stdio.h>
   5 #include <signal.h>
   6 #include <algorithm>
   7 #include <chrono>
   8 #include <string>
   9 #include <vector>
  10 #include <QBoxLayout>
  11 #include <QInputDialog>
  12 #include <QKeySequence>
  13 #include <QLabel>
  14 #include <QMetaType>
  15 #include <QPushButton>
  16 #include <QResizeEvent>
  17 #include <QShortcut>
  18 #include <QSize>
  19 #include <QString>
  20
  21 #include "aboutdialog.h"
  22 #include "disk_space_estimator.h"
  23 #include "flags.h"
  24 #include "glwidget.h"
  25 #include "input_mapping_dialog.h"
  26 #include "lrameter.h"
  27 #include "mixer.h"
  28 #include "post_to_main_thread.h"
  29 #include "ui_audio_miniview.h"
  30 #include "ui_audio_expanded_view.h"
  31 #include "ui_display.h"
  32 #include "ui_mainwindow.h"
  33 #include "vumeter.h"
  34
  35 class QResizeEvent;
  36
  37 using namespace std;
  38 using namespace std::chrono;
  39 using namespace std::placeholders;
  40
  41 Q_DECLARE_METATYPE(std::string);
  42 Q_DECLARE_METATYPE(std::vector<std::string>);
  43
  44 MainWindow *global_mainwindow = nullptr;
  45
  46 namespace {
  47
  48 void schedule_cut_signal(int ignored)
  49 {
  50         global_mixer->schedule_cut();
  51 }
  52
  53 void quit_signal(int ignored)
  54 {
  55         global_mainwindow->close();
  56 }
  57
  58 void slave_knob(QDial *master, QDial *slave)
  59 {
  60         QWidget::connect(master, &QDial::valueChanged, [slave](int value){
  61                 slave->blockSignals(true);
  62                 slave->setValue(value);
  63                 slave->blockSignals(false);
  64         });
  65         QWidget::connect(slave, &QDial::valueChanged, [master](int value){
  66                 master->setValue(value);
  67         });
  68 }
  69
  70 void slave_checkbox(QCheckBox *master, QCheckBox *slave)
  71 {
  72         QWidget::connect(master, &QCheckBox::stateChanged, [slave](int state){
  73                 slave->blockSignals(true);
  74                 slave->setCheckState(Qt::CheckState(state));
  75                 slave->blockSignals(false);
  76         });
  77         QWidget::connect(slave, &QCheckBox::stateChanged, [master](int state){
  78                 master->setCheckState(Qt::CheckState(state));
  79         });
  80 }
  81
  82 void slave_fader(NonLinearFader *master, NonLinearFader *slave)
  83 {
  84         QWidget::connect(master, &NonLinearFader::dbValueChanged, [slave](double value) {
  85                 slave->blockSignals(true);
  86                 slave->setDbValue(value);
  87                 slave->blockSignals(false);
  88         });
  89         QWidget::connect(slave, &NonLinearFader::dbValueChanged, [master](double value){
  90                 master->setDbValue(value);
  91         });
  92 }
  93
  94 constexpr unsigned DB_NO_FLAGS = 0x0;
  95 constexpr unsigned DB_WITH_SIGN = 0x1;
  96 constexpr unsigned DB_BARE = 0x2;
  97
  98 string format_db(double db, unsigned flags)
  99 {
 100         string text;
 101         if (flags & DB_WITH_SIGN) {
 102                 if (isfinite(db)) {
 103                         char buf[256];
 104                         snprintf(buf, sizeof(buf), "%+.1f", db);
 105                         text = buf;
 106                 } else if (db < 0.0) {
 107                         text = "-∞";
 108                 } else {
 109                         // Should never happen, really.
 110                         text = "+∞";
 111                 }
 112         } else {
 113                 if (isfinite(db)) {
 114                         char buf[256];
 115                         snprintf(buf, sizeof(buf), "%.1f", db);
 116                         text = buf;
 117                 } else if (db < 0.0) {
 118                         text = "-∞";
 119                 } else {
 120                         // Should never happen, really.
 121                         text = "∞";
 122                 }
 123         }
 124         if (!(flags & DB_BARE)) {
 125                 text += " dB";
 126         }
 127         return text;
 128 }
 129
 130 void set_peak_label(QLabel *peak_label, float peak_db)
 131 {
 132         peak_label->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 133
 134         // -0.1 dBFS is EBU peak limit. We use it consistently, even for the bus meters
 135         // (which don't calculate interpolate peak, and in general don't follow EBU recommendations).
 136         if (peak_db > -0.1f) {
 137                 peak_label->setStyleSheet("QLabel { background-color: red; color: white; }");
 138         } else {
 139                 peak_label->setStyleSheet("");
 140         }
 141 }
 142
 143 }  // namespace
 144
 145 MainWindow::MainWindow()
 146         : ui(new Ui::MainWindow)
 147 {
 148         global_mainwindow = this;
 149         ui->setupUi(this);
 150
 151         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 152         disk_free_label = new QLabel(this);
 153         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 154         ui->menuBar->setCornerWidget(disk_free_label);
 155
 156         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
 157         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
 158
 159         // The menus.
 160         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
 161         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
 162         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
 163         connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
 164
 165         if (global_flags.x264_video_to_http) {
 166                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
 167         } else {
 168                 ui->x264_bitrate_action->setEnabled(false);
 169         }
 170
 171         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 172         // TODO: Make them dynamic.
 173         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
 174         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
 175         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 176
 177         // Aiee...
 178         transition_btn1 = ui->transition_btn1;
 179         transition_btn2 = ui->transition_btn2;
 180         transition_btn3 = ui->transition_btn3;
 181         qRegisterMetaType<string>("std::string");
 182         qRegisterMetaType<vector<string>>("std::vector<std::string>");
 183         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 184         qRegisterMetaType<Mixer::Output>("Mixer::Output");
 185
 186         // Hook up the prev/next buttons on the audio views.
 187         connect(ui->compact_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 188         connect(ui->compact_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
 189         connect(ui->full_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 190         connect(ui->full_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
 191
 192         // And bind the same to PgUp/PgDown.
 193         auto switch_page = [this]{
 194                 ui->audio_views->setCurrentIndex(1 - ui->audio_views->currentIndex());
 195         };
 196         connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, switch_page);
 197         connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, switch_page);
 198
 199         last_audio_level_callback = steady_clock::now() - seconds(1);
 200 }
 201
 202 void MainWindow::resizeEvent(QResizeEvent* event)
 203 {
 204         QMainWindow::resizeEvent(event);
 205
 206         // Ask for a relayout, but only after the event loop is done doing relayout
 207         // on everything else.
 208         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 209 }
 210
 211 void MainWindow::mixer_created(Mixer *mixer)
 212 {
 213         // Make the previews.
 214         unsigned num_previews = mixer->get_num_channels();
 215
 216         for (unsigned i = 0; i < num_previews; ++i) {
 217                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 218
 219                 QWidget *preview = new QWidget(this);
 220                 Ui::Display *ui_display = new Ui::Display;
 221                 ui_display->setupUi(preview);
 222                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 223                 ui_display->display->set_output(output);
 224                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
 225                 previews.push_back(ui_display);
 226
 227                 // Hook up the click.
 228                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 229
 230                 // Let the theme update the text whenever the resolution or color changed.
 231                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 232                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 233
 234                 // Hook up the keyboard key.
 235                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 236                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 237
 238                 // Hook up the white balance button (irrelevant if invisible).
 239                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 240                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 241         }
 242
 243         setup_audio_miniview();
 244         setup_audio_expanded_view();
 245         global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
 246
 247         slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
 248         slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
 249         slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
 250         slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
 251         slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
 252
 253         // TODO: Fetch all of the values these for completeness,
 254         // not just the enable knobs implied by flags.
 255 #if 0
 256         // TODO: Reenable for simple audio.
 257         ui->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(0));
 258         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 259                 global_audio_mixer->set_locut_enabled(0, state == Qt::Checked);
 260         });
 261         ui->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db());
 262         ui->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto());
 263         ui->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled());
 264         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
 265         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 266                 global_audio_mixer->set_gain_staging_auto(state == Qt::Checked);
 267         });
 268         ui->compressor_threshold_db_display->setText(
 269                 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(), DB_WITH_SIGN)));
 270         ui->compressor_threshold_db_display->setText(buf);
 271         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 272         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 273                 global_audio_mixer->set_compressor_enabled(state == Qt::Checked);
 274         });
 275 #else
 276         ui->locut_enabled->setVisible(false);
 277         ui->gainstaging_label->setVisible(false);
 278         ui->gainstaging_knob->setVisible(false);
 279         ui->gainstaging_db_display->setVisible(false);
 280         ui->gainstaging_auto_checkbox->setVisible(false);
 281         ui->compressor_threshold_label->setVisible(false);
 282         ui->compressor_threshold_knob->setVisible(false);
 283         ui->compressor_threshold_db_display->setVisible(false);
 284         ui->compressor_enabled->setVisible(false);
 285 #endif
 286         ui->limiter_enabled->setChecked(global_audio_mixer->get_limiter_enabled());
 287         ui->makeup_gain_auto_checkbox->setChecked(global_audio_mixer->get_final_makeup_gain_auto());
 288
 289         QString limiter_threshold_label(
 290                 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
 291         ui->limiter_threshold_db_display->setText(limiter_threshold_label);
 292         ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
 293
 294         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 295         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 296
 297         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 298         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 299                 global_audio_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 300         });
 301
 302         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 303         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 304                 global_audio_mixer->set_limiter_enabled(state == Qt::Checked);
 305         });
 306         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 307         mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 308
 309         struct sigaction act;
 310         memset(&act, 0, sizeof(act));
 311         act.sa_handler = schedule_cut_signal;
 312         act.sa_flags = SA_RESTART;
 313         sigaction(SIGHUP, &act, nullptr);
 314
 315         // Mostly for debugging. Don't override SIGINT, that's so evil if
 316         // shutdown isn't instant.
 317         memset(&act, 0, sizeof(act));
 318         act.sa_handler = quit_signal;
 319         act.sa_flags = SA_RESTART;
 320         sigaction(SIGUSR1, &act, nullptr);
 321 }
 322
 323 void MainWindow::setup_audio_miniview()
 324 {
 325         // Remove any existing channels.
 326         for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
 327                 delete item->widget();
 328                 delete item;
 329         }
 330         audio_miniviews.clear();
 331
 332         // Set up brand new ones from the input mapping.
 333         InputMapping mapping = global_audio_mixer->get_input_mapping();
 334         audio_miniviews.resize(mapping.buses.size());
 335         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 336                 QWidget *channel = new QWidget(this);
 337                 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
 338                 ui_audio_miniview->setupUi(channel);
 339                 ui_audio_miniview->bus_desc_label->setFullText(
 340                         QString::fromStdString(mapping.buses[bus_index].name));
 341                 audio_miniviews[bus_index] = ui_audio_miniview;
 342
 343                 // Set up the peak meter.
 344                 VUMeter *peak_meter = ui_audio_miniview->peak_meter;
 345                 peak_meter->set_min_level(-30.0f);
 346                 peak_meter->set_max_level(0.0f);
 347                 peak_meter->set_ref_level(0.0f);
 348
 349                 ui_audio_miniview->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 350
 351                 ui->faders->addWidget(channel);
 352
 353                 connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
 354                         bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
 355                 connect(ui_audio_miniview->peak_display_label, &ClickableLabel::clicked,
 356                         [bus_index]() {
 357                                 global_audio_mixer->reset_peak(bus_index);
 358                         });
 359         }
 360 }
 361
 362 void MainWindow::setup_audio_expanded_view()
 363 {
 364         // Remove any existing channels.
 365         for (QLayoutItem *item; (item = ui->buses->takeAt(0)) != nullptr; ) {
 366                 delete item->widget();
 367                 delete item;
 368         }
 369         audio_expanded_views.clear();
 370
 371         // Set up brand new ones from the input mapping.
 372         InputMapping mapping = global_audio_mixer->get_input_mapping();
 373         audio_expanded_views.resize(mapping.buses.size());
 374         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 375                 QWidget *channel = new QWidget(this);
 376                 Ui::AudioExpandedView *ui_audio_expanded_view = new Ui::AudioExpandedView;
 377                 ui_audio_expanded_view->setupUi(channel);
 378                 ui_audio_expanded_view->bus_desc_label->setFullText(
 379                         QString::fromStdString(mapping.buses[bus_index].name));
 380                 audio_expanded_views[bus_index] = ui_audio_expanded_view;
 381                 update_eq_label(bus_index, EQ_BAND_TREBLE, global_audio_mixer->get_eq(bus_index, EQ_BAND_TREBLE));
 382                 update_eq_label(bus_index, EQ_BAND_MID, global_audio_mixer->get_eq(bus_index, EQ_BAND_MID));
 383                 update_eq_label(bus_index, EQ_BAND_BASS, global_audio_mixer->get_eq(bus_index, EQ_BAND_BASS));
 384                 ui_audio_expanded_view->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
 385                 ui->buses->addWidget(channel);
 386
 387                 ui_audio_expanded_view->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(bus_index));
 388                 connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 389                         global_audio_mixer->set_locut_enabled(bus_index, state == Qt::Checked);
 390                 });
 391
 392                 connect(ui_audio_expanded_view->treble_knob, &QDial::valueChanged,
 393                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_TREBLE, _1));
 394                 connect(ui_audio_expanded_view->mid_knob, &QDial::valueChanged,
 395                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_MID, _1));
 396                 connect(ui_audio_expanded_view->bass_knob, &QDial::valueChanged,
 397                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_BASS, _1));
 398
 399                 ui_audio_expanded_view->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(bus_index));
 400                 ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(bus_index));
 401                 ui_audio_expanded_view->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(bus_index));
 402
 403                 connect(ui_audio_expanded_view->gainstaging_knob, &QAbstractSlider::valueChanged, bind(&MainWindow::gain_staging_knob_changed, this, bus_index, _1));
 404                 connect(ui_audio_expanded_view->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, bus_index](int state){
 405                         global_audio_mixer->set_gain_staging_auto(bus_index, state == Qt::Checked);
 406                 });
 407
 408                 connect(ui_audio_expanded_view->compressor_threshold_knob, &QDial::valueChanged, bind(&MainWindow::compressor_threshold_knob_changed, this, bus_index, _1));
 409                 connect(ui_audio_expanded_view->compressor_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
 410                         global_audio_mixer->set_compressor_enabled(bus_index, state == Qt::Checked);
 411                 });
 412
 413                 slave_fader(audio_miniviews[bus_index]->fader, ui_audio_expanded_view->fader);
 414
 415                 // Set up the peak meter.
 416                 VUMeter *peak_meter = ui_audio_expanded_view->peak_meter;
 417                 peak_meter->set_min_level(-30.0f);
 418                 peak_meter->set_max_level(0.0f);
 419                 peak_meter->set_ref_level(0.0f);
 420
 421                 connect(ui_audio_expanded_view->peak_display_label, &ClickableLabel::clicked,
 422                         [bus_index]() {
 423                                 global_audio_mixer->reset_peak(bus_index);
 424                         });
 425
 426                 // Set up the compression attenuation meter.
 427                 VUMeter *reduction_meter = ui_audio_expanded_view->reduction_meter;
 428                 reduction_meter->set_min_level(0.0f);
 429                 reduction_meter->set_max_level(10.0f);
 430                 reduction_meter->set_ref_level(0.0f);
 431                 reduction_meter->set_flip(true);
 432         }
 433
 434         update_cutoff_labels(global_audio_mixer->get_locut_cutoff());
 435 }
 436
 437 void MainWindow::mixer_shutting_down()
 438 {
 439         ui->me_live->clean_context();
 440         ui->me_preview->clean_context();
 441         for (Ui::Display *display : previews) {
 442                 display->display->clean_context();
 443         }
 444 }
 445
 446 void MainWindow::cut_triggered()
 447 {
 448         global_mixer->schedule_cut();
 449 }
 450
 451 void MainWindow::x264_bitrate_triggered()
 452 {
 453         bool ok;
 454         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);
 455         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 456                 global_flags.x264_bitrate = new_bitrate;
 457                 global_mixer->change_x264_bitrate(new_bitrate);
 458         }
 459 }
 460
 461 void MainWindow::exit_triggered()
 462 {
 463         close();
 464 }
 465
 466 void MainWindow::about_triggered()
 467 {
 468         AboutDialog().exec();
 469 }
 470
 471 void MainWindow::input_mapping_triggered()
 472 {
 473         if (InputMappingDialog().exec() == QDialog::Accepted) {
 474                 setup_audio_miniview();
 475                 setup_audio_expanded_view();
 476         }
 477 }
 478
 479 void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
 480 {
 481         if (bus_index == 0) {
 482                 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 483         }
 484         if (bus_index < audio_expanded_views.size()) {
 485                 audio_expanded_views[bus_index]->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 486         }
 487
 488         float gain_db = value * 0.1f;
 489         global_audio_mixer->set_gain_staging_db(bus_index, gain_db);
 490
 491         // The label will be updated by the audio level callback.
 492 }
 493
 494 void MainWindow::final_makeup_gain_knob_changed(int value)
 495 {
 496         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 497
 498         float gain_db = value * 0.1f;
 499         global_audio_mixer->set_final_makeup_gain_db(gain_db);
 500
 501         // The label will be updated by the audio level callback.
 502 }
 503
 504 void MainWindow::cutoff_knob_changed(int value)
 505 {
 506         float octaves = value * 0.1f;
 507         float cutoff_hz = 20.0 * pow(2.0, octaves);
 508         global_audio_mixer->set_locut_cutoff(cutoff_hz);
 509         update_cutoff_labels(cutoff_hz);
 510 }
 511
 512 void MainWindow::update_cutoff_labels(float cutoff_hz)
 513 {
 514         char buf[256];
 515         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 516         ui->locut_cutoff_display->setText(buf);
 517         ui->locut_cutoff_display_2->setText(buf);
 518
 519         for (unsigned bus_index = 0; bus_index < audio_expanded_views.size(); ++bus_index) {
 520                 audio_expanded_views[bus_index]->locut_enabled->setText(
 521                         QString("Lo-cut: ") + buf);
 522         }
 523 }
 524
 525 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 526 {
 527         char time_str[256];
 528         if (estimated_seconds_left < 60.0) {
 529                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 530         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 531                 int s = lrintf(estimated_seconds_left);
 532                 int m = s / 60;
 533                 s %= 60;
 534                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 535         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 536                 int m = lrintf(estimated_seconds_left / 60.0);
 537                 snprintf(time_str, sizeof(time_str), "%dm", m);
 538         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 539                 int m = lrintf(estimated_seconds_left / 60.0);
 540                 int h = m / 60;
 541                 m %= 60;
 542                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 543         } else {  // More than ten hours: Xh.
 544                 int h = lrintf(estimated_seconds_left / 3600.0);
 545                 snprintf(time_str, sizeof(time_str), "%dh", h);
 546         }
 547         char buf[256];
 548         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 549
 550         std::string label = buf;
 551
 552         post_to_main_thread([this, label]{
 553                 disk_free_label->setText(QString::fromStdString(label));
 554                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 555         });
 556 }
 557
 558 void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
 559 {
 560         float gain_db = value * 0.1f;
 561         global_audio_mixer->set_eq(bus_index, band, gain_db);
 562
 563         update_eq_label(bus_index, band, gain_db);
 564 }
 565
 566 void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
 567 {
 568         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 569         string db_string = format_db(gain_db, DB_WITH_SIGN);
 570         switch (band) {
 571         case EQ_BAND_TREBLE:
 572                 view->treble_label->setText(QString::fromStdString("Treble: " + db_string));
 573                 break;
 574         case EQ_BAND_MID:
 575                 view->mid_label->setText(QString::fromStdString("Mid: " + db_string));
 576                 break;
 577         case EQ_BAND_BASS:
 578                 view->bass_label->setText(QString::fromStdString("Bass: " + db_string));
 579                 break;
 580         default:
 581                 assert(false);
 582         }
 583 }
 584
 585 void MainWindow::limiter_threshold_knob_changed(int value)
 586 {
 587         float threshold_dbfs = value * 0.1f;
 588         global_audio_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 589         ui->limiter_threshold_db_display->setText(
 590                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 591         ui->limiter_threshold_db_display_2->setText(
 592                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 593 }
 594
 595 void MainWindow::compressor_threshold_knob_changed(unsigned bus_index, int value)
 596 {
 597         float threshold_dbfs = value * 0.1f;
 598         global_audio_mixer->set_compressor_threshold_dbfs(bus_index, threshold_dbfs);
 599
 600         QString label(QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 601         if (bus_index == 0) {
 602                 ui->compressor_threshold_db_display->setText(label);
 603         }
 604         if (bus_index < audio_expanded_views.size()) {
 605                 audio_expanded_views[bus_index]->compressor_threshold_db_display->setText(label);
 606         }
 607 }
 608
 609 void MainWindow::mini_fader_changed(int bus, double volume_db)
 610 {
 611         QString label(QString::fromStdString(format_db(volume_db, DB_WITH_SIGN)));
 612         audio_miniviews[bus]->fader_label->setText(label);
 613         audio_expanded_views[bus]->fader_label->setText(label);
 614
 615         global_audio_mixer->set_fader_volume(bus, volume_db);
 616 }
 617
 618 void MainWindow::reset_meters_button_clicked()
 619 {
 620         global_audio_mixer->reset_meters();
 621         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
 622         ui->peak_display->setStyleSheet("");
 623 }
 624
 625 void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<AudioMixer::BusLevel> bus_levels,
 626                                       float global_level_lufs,
 627                                       float range_low_lufs, float range_high_lufs,
 628                                       float final_makeup_gain_db,
 629                                       float correlation)
 630 {
 631         steady_clock::time_point now = steady_clock::now();
 632
 633         // The meters are somewhat inefficient to update. Only update them
 634         // every 100 ms or so (we get updates every 5–20 ms). Note that this
 635         // means that the digital peak meters are ever so slightly too low
 636         // (each update won't be a faithful representation of the highest peak
 637         // since the previous update, since there are frames we won't draw),
 638         // but the _peak_ of the peak meters will be correct (it's tracked in
 639         // AudioMixer, not here), and that's much more important.
 640         double last_update_age = duration<double>(now - last_audio_level_callback).count();
 641         if (last_update_age < 0.100) {
 642                 return;
 643         }
 644         last_audio_level_callback = now;
 645
 646         post_to_main_thread([=]() {
 647                 ui->vu_meter->set_level(level_lufs);
 648                 for (unsigned bus_index = 0; bus_index < bus_levels.size(); ++bus_index) {
 649                         if (bus_index < audio_miniviews.size()) {
 650                                 const AudioMixer::BusLevel &level = bus_levels[bus_index];
 651                                 Ui::AudioMiniView *miniview = audio_miniviews[bus_index];
 652                                 miniview->peak_meter->set_level(
 653                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 654                                 miniview->peak_meter->set_peak(
 655                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 656                                 set_peak_label(miniview->peak_display_label, level.historic_peak_dbfs);
 657
 658                                 Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
 659                                 view->peak_meter->set_level(
 660                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
 661                                 view->peak_meter->set_peak(
 662                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
 663                                 view->reduction_meter->set_level(level.compressor_attenuation_db);
 664                                 view->gainstaging_knob->blockSignals(true);
 665                                 view->gainstaging_knob->setValue(lrintf(level.gain_staging_db * 10.0f));
 666                                 view->gainstaging_knob->blockSignals(false);
 667                                 view->gainstaging_db_display->setText(
 668                                         QString("Gain: ") +
 669                                         QString::fromStdString(format_db(level.gain_staging_db, DB_WITH_SIGN)));
 670                                 set_peak_label(view->peak_display_label, level.historic_peak_dbfs);
 671                         }
 672                 }
 673                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 674                 ui->correlation_meter->set_correlation(correlation);
 675
 676                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 677                 set_peak_label(ui->peak_display, peak_db);
 678
 679                 // NOTE: Will be invisible when using multitrack audio.
 680                 ui->gainstaging_knob->blockSignals(true);
 681                 ui->gainstaging_knob->setValue(lrintf(bus_levels[0].gain_staging_db * 10.0f));
 682                 ui->gainstaging_knob->blockSignals(false);
 683                 ui->gainstaging_db_display->setText(
 684                         QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
 685
 686                 ui->makeup_gain_knob->blockSignals(true);
 687                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 688                 ui->makeup_gain_knob->blockSignals(false);
 689                 ui->makeup_gain_db_display->setText(
 690                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 691                 ui->makeup_gain_db_display_2->setText(
 692                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 693         });
 694 }
 695
 696 void MainWindow::relayout()
 697 {
 698         int height = ui->vertical_layout->geometry().height();
 699
 700         double remaining_height = height;
 701
 702         // Allocate the height; the most important part is to keep the main displays
 703         // at 16:9 if at all possible.
 704         double me_width = ui->me_preview->width();
 705         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 706
 707         // TODO: Scale the widths when we need to do this.
 708         if (me_height / double(height) > 0.8) {
 709                 me_height = height * 0.8;
 710         }
 711         remaining_height -= me_height + ui->vertical_layout->spacing();
 712
 713         // Space between the M/E displays and the audio strip.
 714         remaining_height -= ui->vertical_layout->spacing();
 715
 716         // The label above the audio strip.
 717         double compact_label_height = ui->compact_label->geometry().height() +
 718                 ui->compact_audio_layout->spacing();
 719         remaining_height -= compact_label_height;
 720
 721         // The previews will be constrained by the remaining height, and the width.
 722         double preview_label_height = previews[0]->title_bar->geometry().height() +
 723                 previews[0]->main_vertical_layout->spacing();
 724         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 725         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 726         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 727
 728         ui->vertical_layout->setStretch(0, lrintf(me_height));
 729         ui->vertical_layout->setStretch(1,
 730                 lrintf(compact_label_height) +
 731                 lrintf(remaining_height) +
 732                 lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
 733
 734         ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
 735         ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
 736         ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
 737
 738         // Set the widths for the previews.
 739         double preview_width = preview_height * 16.0 / 9.0;
 740         for (unsigned i = 0; i < previews.size(); ++i) {
 741                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 742         }
 743
 744         // The preview horizontal spacer.
 745         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 746         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 747 }
 748
 749 void MainWindow::set_transition_names(vector<string> transition_names)
 750 {
 751         if (transition_names.size() < 1 || transition_names[0].empty()) {
 752                 transition_btn1->setText(QString(""));
 753         } else {
 754                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
 755                 ui->transition_btn1->setShortcut(QKeySequence("J"));
 756         }
 757         if (transition_names.size() < 2 || transition_names[1].empty()) {
 758                 transition_btn2->setText(QString(""));
 759         } else {
 760                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
 761                 ui->transition_btn2->setShortcut(QKeySequence("K"));
 762         }
 763         if (transition_names.size() < 3 || transition_names[2].empty()) {
 764                 transition_btn3->setText(QString(""));
 765         } else {
 766                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
 767                 ui->transition_btn3->setShortcut(QKeySequence("L"));
 768         }
 769 }
 770
 771 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
 772 {
 773         if (output >= Mixer::OUTPUT_INPUT0) {
 774                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 775                 previews[channel]->label->setText(name.c_str());
 776         }
 777 }
 778
 779 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
 780 {
 781         if (output >= Mixer::OUTPUT_INPUT0) {
 782                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 783                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
 784         }
 785 }
 786
 787 void MainWindow::transition_clicked(int transition_number)
 788 {
 789         global_mixer->transition_clicked(transition_number);
 790 }
 791
 792 void MainWindow::channel_clicked(int channel_number)
 793 {
 794         if (current_wb_pick_display == channel_number) {
 795                 // The picking was already done from eventFilter(), since we don't get
 796                 // the mouse pointer here.
 797         } else {
 798                 global_mixer->channel_clicked(channel_number);
 799         }
 800 }
 801
 802 void MainWindow::wb_button_clicked(int channel_number)
 803 {
 804         current_wb_pick_display = channel_number;
 805         QApplication::setOverrideCursor(Qt::CrossCursor);
 806 }
 807
 808 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 809 {
 810         if (current_wb_pick_display != -1 &&
 811             event->type() == QEvent::MouseButtonRelease &&
 812             watched->isWidgetType()) {
 813                 QApplication::restoreOverrideCursor();
 814                 if (watched == previews[current_wb_pick_display]->display) {
 815                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 816                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 817                 } else {
 818                         // The user clicked on something else, give up.
 819                         // (The click goes through, which might not be ideal, but, yes.)
 820                         current_wb_pick_display = -1;
 821                 }
 822         }
 823         return false;
 824 }
 825
 826 namespace {
 827
 828 double srgb_to_linear(double x)
 829 {
 830         if (x < 0.04045) {
 831                 return x / 12.92;
 832         } else {
 833                 return pow((x + 0.055) / 1.055, 2.4);
 834         }
 835 }
 836
 837 }  // namespace
 838
 839 void MainWindow::set_white_balance(int channel_number, int x, int y)
 840 {
 841         // Set the white balance to neutral for the grab. It's probably going to
 842         // flicker a bit, but hopefully this display is not live anyway.
 843         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 844         previews[channel_number]->display->updateGL();
 845         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 846
 847         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 848         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 849         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 850         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 851         previews[channel_number]->display->updateGL();
 852 }
 853
 854 void MainWindow::audio_state_changed()
 855 {
 856         post_to_main_thread([this]{
 857                 InputMapping mapping = global_audio_mixer->get_input_mapping();
 858                 for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
 859                         const InputMapping::Bus &bus = mapping.buses[bus_index];
 860                         string suffix;
 861                         if (bus.device.type == InputSourceType::ALSA_INPUT) {
 862                                 ALSAPool::Device::State state = global_audio_mixer->get_alsa_card_state(bus.device.index);
 863                                 if (state == ALSAPool::Device::State::STARTING) {
 864                                         suffix = " (busy)";
 865                                 } else if (state == ALSAPool::Device::State::DEAD) {
 866                                         suffix = " (dead)";
 867                                 }
 868                         }
 869
 870                         audio_miniviews[bus_index]->bus_desc_label->setFullText(
 871                                 QString::fromStdString(bus.name + suffix));
 872                         audio_expanded_views[bus_index]->bus_desc_label->setFullText(
 873                                 QString::fromStdString(bus.name + suffix));
 874                 }
 875         });
 876 }