X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=mainwindow.cpp;h=3245fdde0254c75e8505e52bbfa0a4fcd568449c;hb=61116d03f84a53e96445c2b5d8686f2ea7e7c855;hp=5eb631a8890efa2ba9131c5c298657821671a3e0;hpb=41c91a56e836c4e81fcee2f3728ca09c0cc2a7bd;p=nageru

diff --git a/mainwindow.cpp b/mainwindow.cpp
index 5eb631a..3245fdd 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -27,6 +27,7 @@
 #include "mixer.h"
 #include "post_to_main_thread.h"
 #include "ui_audio_miniview.h"
+#include "ui_audio_expanded_view.h"
 #include "ui_display.h"
 #include "ui_mainwindow.h"
 #include "vumeter.h"
@@ -54,6 +55,42 @@ void quit_signal(int ignored)
 	global_mainwindow->close();
 }
 
+void slave_knob(QDial *master, QDial *slave)
+{
+	QWidget::connect(master, &QDial::valueChanged, [slave](int value){
+		slave->blockSignals(true);
+		slave->setValue(value);
+		slave->blockSignals(false);
+	});
+	QWidget::connect(slave, &QDial::valueChanged, [master](int value){
+		master->setValue(value);
+	});
+}
+
+void slave_checkbox(QCheckBox *master, QCheckBox *slave)
+{
+	QWidget::connect(master, &QCheckBox::stateChanged, [slave](int state){
+		slave->blockSignals(true);
+		slave->setCheckState(Qt::CheckState(state));
+		slave->blockSignals(false);
+	});
+	QWidget::connect(slave, &QCheckBox::stateChanged, [master](int state){
+		master->setCheckState(Qt::CheckState(state));
+	});
+}
+
+void slave_fader(NonLinearFader *master, NonLinearFader *slave)
+{
+	QWidget::connect(master, &NonLinearFader::dbValueChanged, [slave](double value) {
+		slave->blockSignals(true);
+		slave->setDbValue(value);
+		slave->blockSignals(false);
+	});
+	QWidget::connect(slave, &NonLinearFader::dbValueChanged, [master](double value){
+		master->setDbValue(value);
+	});
+}
+
 constexpr unsigned DB_NO_FLAGS = 0x0;
 constexpr unsigned DB_WITH_SIGN = 0x1;
 constexpr unsigned DB_BARE = 0x2;
@@ -90,6 +127,19 @@ string format_db(double db, unsigned flags)
 	return text;
 }
 
+void set_peak_label(QLabel *peak_label, float peak_db)
+{
+	peak_label->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
+
+	// -0.1 dBFS is EBU peak limit. We use it consistently, even for the bus meters
+	// (which don't calculate interpolate peak, and in general don't follow EBU recommendations).
+	if (peak_db > -0.1f) {
+		peak_label->setStyleSheet("QLabel { background-color: red; color: white; }");
+	} else {
+		peak_label->setStyleSheet("");
+	}
+}
+
 }  // namespace
 
 MainWindow::MainWindow()
@@ -133,6 +183,12 @@ MainWindow::MainWindow()
 	connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 	qRegisterMetaType<Mixer::Output>("Mixer::Output");
 
+	// Hook up the prev/next buttons on the audio views.
+	connect(ui->compact_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
+	connect(ui->compact_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
+	connect(ui->full_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
+	connect(ui->full_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
+
 	last_audio_level_callback = steady_clock::now() - seconds(1);
 }
 
@@ -178,46 +234,70 @@ void MainWindow::mixer_created(Mixer *mixer)
 	}
 
 	setup_audio_miniview();
+	setup_audio_expanded_view();
+	global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
+
+	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.
-	ui->locut_enabled->setChecked(global_mixer->get_audio_mixer()->get_locut_enabled());
-	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());
-	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());
-
-	ui->limiter_threshold_db_display->setText(
-		QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
+#if 0
+	// TODO: Reenable for simple audio.
+	ui->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(0));
+	connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
+		global_audio_mixer->set_locut_enabled(0, state == Qt::Checked);
+	});
+	ui->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db());
+	ui->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto());
+	ui->compressor_enabled->setChecked(global_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_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_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_audio_mixer->get_limiter_enabled());
+	ui->makeup_gain_auto_checkbox->setChecked(global_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->locut_enabled, &QCheckBox::stateChanged, [this](int state){
-		global_mixer->get_audio_mixer()->set_locut_enabled(state == Qt::Checked);
-	});
 
-	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);
-	});
 	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);
+		global_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->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_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->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
-		global_mixer->get_audio_mixer()->set_compressor_enabled(state == Qt::Checked);
+		global_audio_mixer->set_limiter_enabled(state == Qt::Checked);
 	});
 	connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
-	mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
+	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));
@@ -240,21 +320,111 @@ void MainWindow::setup_audio_miniview()
 		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();
+	InputMapping mapping = global_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));
-		// TODO: Set the fader position.
+		audio_miniviews[bus_index] = ui_audio_miniview;
+
+		// Set up the peak meter.
+		VUMeter *peak_meter = ui_audio_miniview->peak_meter;
+		peak_meter->set_min_level(-30.0f);
+		peak_meter->set_max_level(0.0f);
+		peak_meter->set_ref_level(0.0f);
+
+		ui_audio_miniview->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
+
 		ui->faders->addWidget(channel);
 
-		connect(ui_audio_miniview->fader, &QAbstractSlider::valueChanged,
-			bind(&MainWindow::mini_fader_changed, this, ui_audio_miniview, bus_index, _1));
+		connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
+			bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
+		connect(ui_audio_miniview->peak_display_label, &ClickableLabel::clicked,
+		        [bus_index]() {
+				global_audio_mixer->reset_peak(bus_index);
+			});
+	}
+}
+
+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_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;
+		update_eq_label(bus_index, EQ_BAND_TREBLE, global_audio_mixer->get_eq(bus_index, EQ_BAND_TREBLE));
+		update_eq_label(bus_index, EQ_BAND_MID, global_audio_mixer->get_eq(bus_index, EQ_BAND_MID));
+		update_eq_label(bus_index, EQ_BAND_BASS, global_audio_mixer->get_eq(bus_index, EQ_BAND_BASS));
+		ui_audio_expanded_view->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
+		ui->buses->addWidget(channel);
+
+		ui_audio_expanded_view->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(bus_index));
+		connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
+			global_audio_mixer->set_locut_enabled(bus_index, state == Qt::Checked);
+		});
+
+		connect(ui_audio_expanded_view->treble_knob, &QDial::valueChanged,
+		        bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_TREBLE, _1));
+		connect(ui_audio_expanded_view->mid_knob, &QDial::valueChanged,
+		        bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_MID, _1));
+		connect(ui_audio_expanded_view->bass_knob, &QDial::valueChanged,
+		        bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_BASS, _1));
+
+		ui_audio_expanded_view->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(bus_index));
+		ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(bus_index));
+		ui_audio_expanded_view->compressor_enabled->setChecked(global_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_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_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 peak meter.
+		VUMeter *peak_meter = ui_audio_expanded_view->peak_meter;
+		peak_meter->set_min_level(-30.0f);
+		peak_meter->set_max_level(0.0f);
+		peak_meter->set_ref_level(0.0f);
+
+		connect(ui_audio_expanded_view->peak_display_label, &ClickableLabel::clicked,
+		        [bus_index]() {
+				global_audio_mixer->reset_peak(bus_index);
+			});
+
+		// 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);
 	}
+
+	update_cutoff_labels(global_audio_mixer->get_locut_cutoff());
 }
 
 void MainWindow::mixer_shutting_down()
@@ -295,15 +465,21 @@ void MainWindow::input_mapping_triggered()
 {
 	if (InputMappingDialog().exec() == QDialog::Accepted) {
 		setup_audio_miniview();
+		setup_audio_expanded_view();
 	}
 }
 
-void MainWindow::gain_staging_knob_changed(int value)
+void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
 {
-	ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
+	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(gain_db);
+	global_audio_mixer->set_gain_staging_db(bus_index, gain_db);
 
 	// The label will be updated by the audio level callback.
 }
@@ -313,7 +489,7 @@ 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);
+	global_audio_mixer->set_final_makeup_gain_db(gain_db);
 
 	// The label will be updated by the audio level callback.
 }
@@ -322,11 +498,21 @@ 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);
+	global_audio_mixer->set_locut_cutoff(cutoff_hz);
+	update_cutoff_labels(cutoff_hz);
+}
 
+void MainWindow::update_cutoff_labels(float 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)
@@ -362,49 +548,88 @@ void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_le
 	});
 }
 
+void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
+{
+	float gain_db = value * 0.1f;
+	global_audio_mixer->set_eq(bus_index, band, gain_db);
+
+	update_eq_label(bus_index, band, gain_db);
+}
+
+void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
+{
+	Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
+	string db_string = format_db(gain_db, DB_WITH_SIGN);
+	switch (band) {
+	case EQ_BAND_TREBLE:
+		view->treble_label->setText(QString::fromStdString("Treble: " + db_string));
+		break;
+	case EQ_BAND_MID:
+		view->mid_label->setText(QString::fromStdString("Mid: " + db_string));
+		break;
+	case EQ_BAND_BASS:
+		view->bass_label->setText(QString::fromStdString("Bass: " + db_string));
+		break;
+	default:
+		assert(false);
+	}
+}
+
 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);
+	global_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(int value)
+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(threshold_dbfs);
-	ui->compressor_threshold_db_display->setText(
-		QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
+	global_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(Ui::AudioMiniView *ui, int channel, int value)
+void MainWindow::mini_fader_changed(int bus, double volume_db)
 {
-	float volume_db = value * 0.1f;
-
-	char buf[256];
-	snprintf(buf, sizeof(buf), "%+.1f dB", volume_db);
-	ui->fader_label->setText(buf);
+	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(channel, volume_db);
+	global_audio_mixer->set_fader_volume(bus, volume_db);
 }
 
 void MainWindow::reset_meters_button_clicked()
 {
-	global_mixer->reset_meters();
+	global_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, float global_level_lufs,
+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 gain_staging_db, float final_makeup_gain_db,
+                                      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).
+	// every 100 ms or so (we get updates every 5–20 ms). Note that this
+	// means that the digital peak meters are ever so slightly too low
+	// (each update won't be a faithful representation of the highest peak
+	// since the previous update, since there are frames we won't draw),
+	// but the _peak_ of the peak meters will be correct (it's tracked in
+	// AudioMixer, not here), and that's much more important.
 	double last_update_age = duration<double>(now - last_audio_level_callback).count();
 	if (last_update_age < 0.100) {
 		return;
@@ -413,27 +638,51 @@ void MainWindow::audio_level_callback(float level_lufs, float peak_db, float glo
 
 	post_to_main_thread([=]() {
 		ui->vu_meter->set_level(level_lufs);
+		for (unsigned bus_index = 0; bus_index < bus_levels.size(); ++bus_index) {
+			if (bus_index < audio_miniviews.size()) {
+				const AudioMixer::BusLevel &level = bus_levels[bus_index];
+				Ui::AudioMiniView *miniview = audio_miniviews[bus_index];
+				miniview->peak_meter->set_level(
+					level.current_level_dbfs[0], level.current_level_dbfs[1]);
+				miniview->peak_meter->set_peak(
+					level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
+				set_peak_label(miniview->peak_display_label, level.historic_peak_dbfs);
+
+				Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
+				view->peak_meter->set_level(
+					level.current_level_dbfs[0], level.current_level_dbfs[1]);
+				view->peak_meter->set_peak(
+					level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
+				view->reduction_meter->set_level(level.compressor_attenuation_db);
+				view->gainstaging_knob->blockSignals(true);
+				view->gainstaging_knob->setValue(lrintf(level.gain_staging_db * 10.0f));
+				view->gainstaging_knob->blockSignals(false);
+				view->gainstaging_db_display->setText(
+					QString("Gain: ") +
+					QString::fromStdString(format_db(level.gain_staging_db, DB_WITH_SIGN)));
+				set_peak_label(view->peak_display_label, level.historic_peak_dbfs);
+			}
+		}
 		ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 		ui->correlation_meter->set_correlation(correlation);
 
 		ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
-		if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
-			ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
-		} else {
-			ui->peak_display->setStyleSheet("");
-		}
+		set_peak_label(ui->peak_display, peak_db);
 
+		// NOTE: Will be invisible when using multitrack audio.
 		ui->gainstaging_knob->blockSignals(true);
-		ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
+		ui->gainstaging_knob->setValue(lrintf(bus_levels[0].gain_staging_db * 10.0f));
 		ui->gainstaging_knob->blockSignals(false);
 		ui->gainstaging_db_display->setText(
-			QString::fromStdString(format_db(gain_staging_db, DB_WITH_SIGN)));
+			QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
 
 		ui->makeup_gain_knob->blockSignals(true);
 		ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 		ui->makeup_gain_knob->blockSignals(false);
 		ui->makeup_gain_db_display->setText(
 			QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
+		ui->makeup_gain_db_display_2->setText(
+			QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 	});
 }
 
@@ -457,6 +706,11 @@ void MainWindow::relayout()
 	// Space between the M/E displays and the audio strip.
 	remaining_height -= ui->vertical_layout->spacing();
 
+	// The label above the audio strip.
+	double compact_label_height = ui->compact_label->geometry().height() +
+		ui->compact_audio_layout->spacing();
+	remaining_height -= compact_label_height;
+
 	// The previews will be constrained by the remaining height, and the width.
 	double preview_label_height = previews[0]->title_bar->geometry().height() +
 		previews[0]->main_vertical_layout->spacing();
@@ -465,8 +719,14 @@ void MainWindow::relayout()
 	remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 
 	ui->vertical_layout->setStretch(0, lrintf(me_height));
-	ui->vertical_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
-	ui->vertical_layout->setStretch(2, lrintf(preview_height + preview_label_height));
+	ui->vertical_layout->setStretch(1,
+		lrintf(compact_label_height) +
+		lrintf(remaining_height) +
+		lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
+
+	ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
+	ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
+	ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
 
 	// Set the widths for the previews.
 	double preview_width = preview_height * 16.0 / 9.0;
@@ -583,3 +843,27 @@ void MainWindow::set_white_balance(int channel_number, int x, int y)
 	global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 	previews[channel_number]->display->updateGL();
 }
+
+void MainWindow::audio_state_changed()
+{
+	post_to_main_thread([this]{
+		InputMapping mapping = global_audio_mixer->get_input_mapping();
+		for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
+			const InputMapping::Bus &bus = mapping.buses[bus_index];
+			string suffix;
+			if (bus.device.type == InputSourceType::ALSA_INPUT) {
+				ALSAPool::Device::State state = global_audio_mixer->get_alsa_card_state(bus.device.index);
+				if (state == ALSAPool::Device::State::STARTING) {
+					suffix = " (busy)";
+				} else if (state == ALSAPool::Device::State::DEAD) {
+					suffix = " (dead)";
+				}
+			}
+
+			audio_miniviews[bus_index]->bus_desc_label->setFullText(
+				QString::fromStdString(bus.name + suffix));
+			audio_expanded_views[bus_index]->bus_desc_label->setFullText(
+				QString::fromStdString(bus.name + suffix));
+		}
+	});
+}