+ // Make the previews.
+ unsigned num_previews = mixer->get_num_channels();
+
+ for (unsigned i = 0; i < num_previews; ++i) {
+ Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
+
+ QWidget *preview = new QWidget(this);
+ Ui::Display *ui_display = new Ui::Display;
+ ui_display->setupUi(preview);
+ ui_display->label->setText(mixer->get_channel_name(output).c_str());
+ ui_display->display->set_output(output);
+ ui->preview_displays->insertWidget(previews.size(), preview, 1);
+ previews.push_back(ui_display);
+
+ // Hook up the click.
+ connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
+
+ // Let the theme update the text whenever the resolution or color changed.
+ connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
+ connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
+
+ // Hook up the keyboard key.
+ QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
+ connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
+
+ // Hook up the white balance button (irrelevant if invisible).
+ ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
+ connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
+ }
+
+ setup_audio_miniview();
+ setup_audio_expanded_view();
+
+ slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
+ slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
+ slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
+ slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
+ slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
+
+ // TODO: Fetch all of the values these for completeness,
+ // not just the enable knobs implied by flags.
+#if 0
+ // TODO: Reenable for simple audio.
+ ui->locut_enabled->setChecked(global_mixer->get_audio_mixer()->get_locut_enabled(0));
+ connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
+ global_mixer->get_audio_mixer()->set_locut_enabled(0, state == Qt::Checked);
+ });
+ ui->gainstaging_knob->setValue(global_mixer->get_audio_mixer()->get_gain_staging_db());
+ ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_audio_mixer()->get_gain_staging_auto());
+ ui->compressor_enabled->setChecked(global_mixer->get_audio_mixer()->get_compressor_enabled());
+ connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
+ connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
+ global_mixer->get_audio_mixer()->set_gain_staging_auto(state == Qt::Checked);
+ });
+ ui->compressor_threshold_db_display->setText(
+ QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(), DB_WITH_SIGN)));
+ ui->compressor_threshold_db_display->setText(buf);
+ connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
+ connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
+ global_mixer->get_audio_mixer()->set_compressor_enabled(state == Qt::Checked);
+ });
+#else
+ ui->locut_enabled->setVisible(false);
+ ui->gainstaging_label->setVisible(false);
+ ui->gainstaging_knob->setVisible(false);
+ ui->gainstaging_db_display->setVisible(false);
+ ui->gainstaging_auto_checkbox->setVisible(false);
+ ui->compressor_threshold_label->setVisible(false);
+ ui->compressor_threshold_knob->setVisible(false);
+ ui->compressor_threshold_db_display->setVisible(false);
+ ui->compressor_enabled->setVisible(false);
+#endif
+ ui->limiter_enabled->setChecked(global_mixer->get_audio_mixer()->get_limiter_enabled());
+ ui->makeup_gain_auto_checkbox->setChecked(global_mixer->get_audio_mixer()->get_final_makeup_gain_auto());
+
+ QString limiter_threshold_label(
+ QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
+ ui->limiter_threshold_db_display->setText(limiter_threshold_label);
+ ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
+
+ connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
+ cutoff_knob_changed(ui->locut_cutoff_knob->value());
+
+ connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
+ connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
+ global_mixer->get_audio_mixer()->set_final_makeup_gain_auto(state == Qt::Checked);
+ });
+
+ connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
+ connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
+ global_mixer->get_audio_mixer()->set_limiter_enabled(state == Qt::Checked);
+ });
+ connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
+ mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
+
+ struct sigaction act;
+ memset(&act, 0, sizeof(act));
+ act.sa_handler = schedule_cut_signal;
+ act.sa_flags = SA_RESTART;
+ sigaction(SIGHUP, &act, nullptr);
+
+ // Mostly for debugging. Don't override SIGINT, that's so evil if
+ // shutdown isn't instant.
+ memset(&act, 0, sizeof(act));
+ act.sa_handler = quit_signal;
+ act.sa_flags = SA_RESTART;
+ sigaction(SIGUSR1, &act, nullptr);
+}
+
+void MainWindow::setup_audio_miniview()
+{
+ // Remove any existing channels.
+ for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
+ delete item->widget();
+ delete item;
+ }
+ audio_miniviews.clear();
+
+ // Set up brand new ones from the input mapping.
+ InputMapping mapping = global_mixer->get_audio_mixer()->get_input_mapping();
+ audio_miniviews.resize(mapping.buses.size());
+ for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
+ QWidget *channel = new QWidget(this);
+ Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
+ ui_audio_miniview->setupUi(channel);
+ ui_audio_miniview->bus_desc_label->setFullText(
+ QString::fromStdString(mapping.buses[bus_index].name));
+ audio_miniviews[bus_index] = ui_audio_miniview;
+ // TODO: Set the fader position.
+ ui->faders->addWidget(channel);
+
+ connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
+ bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
+ }
+}
+
+void MainWindow::setup_audio_expanded_view()
+{
+ // Remove any existing channels.
+ for (QLayoutItem *item; (item = ui->buses->takeAt(0)) != nullptr; ) {
+ delete item->widget();
+ delete item;
+ }
+ audio_expanded_views.clear();
+
+ // Set up brand new ones from the input mapping.
+ InputMapping mapping = global_mixer->get_audio_mixer()->get_input_mapping();
+ audio_expanded_views.resize(mapping.buses.size());
+ for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
+ QWidget *channel = new QWidget(this);
+ Ui::AudioExpandedView *ui_audio_expanded_view = new Ui::AudioExpandedView;
+ ui_audio_expanded_view->setupUi(channel);
+ ui_audio_expanded_view->bus_desc_label->setFullText(
+ QString::fromStdString(mapping.buses[bus_index].name));
+ audio_expanded_views[bus_index] = ui_audio_expanded_view;
+ // TODO: Set the fader position.
+ ui->buses->addWidget(channel);
+
+ ui_audio_expanded_view->locut_enabled->setChecked(global_mixer->get_audio_mixer()->get_locut_enabled(bus_index));
+ connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
+ global_mixer->get_audio_mixer()->set_locut_enabled(bus_index, state == Qt::Checked);
+ });
+
+ ui_audio_expanded_view->gainstaging_knob->setValue(global_mixer->get_audio_mixer()->get_gain_staging_db(bus_index));
+ ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_mixer->get_audio_mixer()->get_gain_staging_auto(bus_index));
+ ui_audio_expanded_view->compressor_enabled->setChecked(global_mixer->get_audio_mixer()->get_compressor_enabled(bus_index));
+
+ connect(ui_audio_expanded_view->gainstaging_knob, &QAbstractSlider::valueChanged, bind(&MainWindow::gain_staging_knob_changed, this, bus_index, _1));
+ connect(ui_audio_expanded_view->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, bus_index](int state){
+ global_mixer->get_audio_mixer()->set_gain_staging_auto(bus_index, state == Qt::Checked);
+ });
+
+ connect(ui_audio_expanded_view->compressor_threshold_knob, &QDial::valueChanged, bind(&MainWindow::compressor_threshold_knob_changed, this, bus_index, _1));
+ connect(ui_audio_expanded_view->compressor_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
+ global_mixer->get_audio_mixer()->set_compressor_enabled(bus_index, state == Qt::Checked);
+ });
+
+ slave_fader(audio_miniviews[bus_index]->fader, ui_audio_expanded_view->fader);
+
+ // Set up the compression attenuation meter.
+ VUMeter *reduction_meter = ui_audio_expanded_view->reduction_meter;
+ reduction_meter->set_min_level(0.0f);
+ reduction_meter->set_max_level(10.0f);
+ reduction_meter->set_ref_level(0.0f);
+ reduction_meter->set_flip(true);
+ }
+}
+
+void MainWindow::mixer_shutting_down()
+{
+ ui->me_live->clean_context();
+ ui->me_preview->clean_context();
+ for (Ui::Display *display : previews) {
+ display->display->clean_context();
+ }
+}
+
+void MainWindow::cut_triggered()
+{
+ global_mixer->schedule_cut();
+}
+
+void MainWindow::x264_bitrate_triggered()
+{
+ bool ok;
+ 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);
+ if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
+ global_flags.x264_bitrate = new_bitrate;
+ global_mixer->change_x264_bitrate(new_bitrate);
+ }
+}
+
+void MainWindow::exit_triggered()
+{
+ close();
+}
+
+void MainWindow::about_triggered()
+{
+ AboutDialog().exec();
+}
+
+void MainWindow::input_mapping_triggered()
+{
+ if (InputMappingDialog().exec() == QDialog::Accepted) {
+ setup_audio_miniview();
+ setup_audio_expanded_view();
+ }
+}
+
+void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
+{
+ if (bus_index == 0) {
+ ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
+ }
+ if (bus_index < audio_expanded_views.size()) {
+ audio_expanded_views[bus_index]->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
+ }
+
+ float gain_db = value * 0.1f;
+ global_mixer->get_audio_mixer()->set_gain_staging_db(bus_index, gain_db);
+
+ // The label will be updated by the audio level callback.
+}
+
+void MainWindow::final_makeup_gain_knob_changed(int value)
+{
+ ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
+
+ float gain_db = value * 0.1f;
+ global_mixer->get_audio_mixer()->set_final_makeup_gain_db(gain_db);
+
+ // The label will be updated by the audio level callback.
+}
+
+void MainWindow::cutoff_knob_changed(int value)
+{
+ float octaves = value * 0.1f;
+ float cutoff_hz = 20.0 * pow(2.0, octaves);
+ global_mixer->get_audio_mixer()->set_locut_cutoff(cutoff_hz);
+
+ char buf[256];
+ snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
+ ui->locut_cutoff_display->setText(buf);
+ ui->locut_cutoff_display_2->setText(buf);
+
+ for (unsigned bus_index = 0; bus_index < audio_expanded_views.size(); ++bus_index) {
+ audio_expanded_views[bus_index]->locut_enabled->setText(
+ QString("Lo-cut: ") + buf);
+ }
+}
+
+void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
+{
+ char time_str[256];
+ if (estimated_seconds_left < 60.0) {
+ strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
+ } else if (estimated_seconds_left < 1800.0) { // Less than half an hour: Xm Ys (red).
+ int s = lrintf(estimated_seconds_left);
+ int m = s / 60;
+ s %= 60;
+ snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
+ } else if (estimated_seconds_left < 3600.0) { // Less than an hour: Xm.
+ int m = lrintf(estimated_seconds_left / 60.0);
+ snprintf(time_str, sizeof(time_str), "%dm", m);
+ } else if (estimated_seconds_left < 36000.0) { // Less than ten hours: Xh Ym.
+ int m = lrintf(estimated_seconds_left / 60.0);
+ int h = m / 60;
+ m %= 60;
+ snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
+ } else { // More than ten hours: Xh.
+ int h = lrintf(estimated_seconds_left / 3600.0);
+ snprintf(time_str, sizeof(time_str), "%dh", h);
+ }
+ char buf[256];
+ snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
+
+ std::string label = buf;
+
+ post_to_main_thread([this, label]{
+ disk_free_label->setText(QString::fromStdString(label));
+ ui->menuBar->setCornerWidget(disk_free_label); // Need to set this again for the sizing to get right.
+ });
+}
+
+void MainWindow::limiter_threshold_knob_changed(int value)
+{
+ float threshold_dbfs = value * 0.1f;
+ global_mixer->get_audio_mixer()->set_limiter_threshold_dbfs(threshold_dbfs);
+ ui->limiter_threshold_db_display->setText(
+ QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
+ ui->limiter_threshold_db_display_2->setText(
+ QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
+}
+
+void MainWindow::compressor_threshold_knob_changed(unsigned bus_index, int value)
+{
+ float threshold_dbfs = value * 0.1f;
+ global_mixer->get_audio_mixer()->set_compressor_threshold_dbfs(bus_index, threshold_dbfs);
+
+ QString label(QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
+ if (bus_index == 0) {
+ ui->compressor_threshold_db_display->setText(label);
+ }
+ if (bus_index < audio_expanded_views.size()) {
+ audio_expanded_views[bus_index]->compressor_threshold_db_display->setText(label);
+ }
+}
+
+void MainWindow::mini_fader_changed(int bus, double volume_db)
+{
+ QString label(QString::fromStdString(format_db(volume_db, DB_WITH_SIGN)));
+ audio_miniviews[bus]->fader_label->setText(label);
+ audio_expanded_views[bus]->fader_label->setText(label);
+
+ global_mixer->get_audio_mixer()->set_fader_volume(bus, volume_db);
+}
+
+void MainWindow::reset_meters_button_clicked()
+{
+ global_mixer->get_audio_mixer()->reset_meters();
+ ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
+ ui->peak_display->setStyleSheet("");
+}
+
+void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<AudioMixer::BusLevel> bus_levels,
+ float global_level_lufs,
+ float range_low_lufs, float range_high_lufs,
+ float final_makeup_gain_db,
+ float correlation)
+{
+ steady_clock::time_point now = steady_clock::now();
+
+ // The meters are somewhat inefficient to update. Only update them
+ // every 100 ms or so (we get updates every 5–20 ms).
+ double last_update_age = duration<double>(now - last_audio_level_callback).count();
+ if (last_update_age < 0.100) {
+ return;
+ }
+ last_audio_level_callback = now;
+
+ post_to_main_thread([=]() {