]> git.sesse.net Git - nageru/blobdiff - mainwindow.cpp
Support audio-only FFmpeg inputs. Somewhat wonky, though.
[nageru] / mainwindow.cpp
index 36ea55ee3f8883fbe4e97fa484570bc26e70e8ee..b20e3222cda213e1cc994f128996aa5a5cf90975 100644 (file)
@@ -12,6 +12,7 @@
 #include <QApplication>
 #include <QBoxLayout>
 #include <QCheckBox>
+#include <QDesktopServices>
 #include <QDial>
 #include <QDialog>
 #include <QEvent>
@@ -45,7 +46,9 @@
 
 #include "aboutdialog.h"
 #include "alsa_pool.h"
+#include "analyzer.h"
 #include "clickable_label.h"
+#include "context_menus.h"
 #include "correlation_meter.h"
 #include "disk_space_estimator.h"
 #include "ellipsis_label.h"
@@ -126,7 +129,6 @@ void slave_fader(NonLinearFader *master, NonLinearFader *slave)
        });
 }
 
-constexpr unsigned DB_NO_FLAGS = 0x0;
 constexpr unsigned DB_WITH_SIGN = 0x1;
 constexpr unsigned DB_BARE = 0x2;
 
@@ -173,6 +175,21 @@ void set_peak_label(QLabel *peak_label, float peak_db)
        }
 }
 
+string get_bus_desc_label(const InputMapping::Bus &bus)
+{
+       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)";
+               }
+       }
+
+       return bus.name + suffix;
+}
+
 }  // namespace
 
 MainWindow::MainWindow()
@@ -196,18 +213,30 @@ MainWindow::MainWindow()
        // The menus.
        connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
        connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
+       connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
        connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
+       connect(ui->open_analyzer_action, &QAction::triggered, this, &MainWindow::open_analyzer_triggered);
        connect(ui->simple_audio_mode, &QAction::triggered, this, &MainWindow::simple_audio_mode_triggered);
        connect(ui->multichannel_audio_mode, &QAction::triggered, this, &MainWindow::multichannel_audio_mode_triggered);
        connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
        connect(ui->midi_mapping_action, &QAction::triggered, this, &MainWindow::midi_mapping_triggered);
+       connect(ui->timecode_stream_action, &QAction::triggered, this, &MainWindow::timecode_stream_triggered);
+       connect(ui->timecode_stdout_action, &QAction::triggered, this, &MainWindow::timecode_stdout_triggered);
 
-       if (global_flags.x264_video_to_http) {
+       ui->timecode_stream_action->setChecked(global_flags.display_timecode_in_stream);
+       ui->timecode_stdout_action->setChecked(global_flags.display_timecode_on_stdout);
+
+       if (global_flags.x264_video_to_http && isinf(global_flags.x264_crf)) {
                connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
        } else {
                ui->x264_bitrate_action->setEnabled(false);
        }
 
+       connect(ui->video_menu, &QMenu::aboutToShow, [this]{
+               fill_hdmi_sdi_output_device_menu(ui->hdmi_sdi_output_device_menu);
+               fill_hdmi_sdi_output_resolution_menu(ui->hdmi_sdi_output_resolution_menu);
+       });
+
        // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
        // TODO: Make them dynamic.
        connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
@@ -224,19 +253,40 @@ MainWindow::MainWindow()
        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));
-
-       // And bind the same to PgUp/PgDown.
-       auto switch_page = [this]{
+       auto prev_page = [this]{
+               if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
+                       ui->audio_views->setCurrentIndex((ui->audio_views->currentIndex() + 2) % 3);
+               } else {
+                       ui->audio_views->setCurrentIndex(2 - ui->audio_views->currentIndex());  // Switch between 0 and 2.
+               }
+       };
+       auto next_page = [this]{
                if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
-                       ui->audio_views->setCurrentIndex(1 - ui->audio_views->currentIndex());
+                       ui->audio_views->setCurrentIndex((ui->audio_views->currentIndex() + 1) % 3);
+               } else {
+                       ui->audio_views->setCurrentIndex(2 - ui->audio_views->currentIndex());  // Switch between 0 and 2.
                }
        };
-       connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, switch_page);
-       connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, switch_page);
+       connect(ui->compact_prev_page, &QAbstractButton::clicked, prev_page);
+       connect(ui->compact_next_page, &QAbstractButton::clicked, next_page);
+       connect(ui->full_prev_page, &QAbstractButton::clicked, prev_page);
+       connect(ui->full_next_page, &QAbstractButton::clicked, next_page);
+       connect(ui->video_grid_prev_page, &QAbstractButton::clicked, prev_page);
+       connect(ui->video_grid_next_page, &QAbstractButton::clicked, next_page);
+
+       // And bind the same to PgUp/PgDown.
+       connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, next_page);
+       connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, prev_page);
+
+       // When the audio view changes, move the previews.
+       connect(ui->audio_views, &QStackedWidget::currentChanged, bind(&MainWindow::audio_view_changed, this, _1));
+
+       if (global_flags.enable_quick_cut_keys) {
+               ui->quick_cut_enable_action->setChecked(true);
+       }
+       connect(ui->quick_cut_enable_action, &QAction::changed, [this](){
+               global_flags.enable_quick_cut_keys = ui->quick_cut_enable_action->isChecked();
+       });
 
        last_audio_level_callback = steady_clock::now() - seconds(1);
 
@@ -251,7 +301,6 @@ MainWindow::MainWindow()
        }
        midi_mapper.refresh_highlights();
        midi_mapper.refresh_lights();
-       midi_mapper.start_thread();
 }
 
 void MainWindow::resizeEvent(QResizeEvent* event)
@@ -268,15 +317,15 @@ void MainWindow::mixer_created(Mixer *mixer)
        // Make the previews.
        unsigned num_previews = mixer->get_num_channels();
 
+       const char qwerty[] = "QWERTYUIOP";
        for (unsigned i = 0; i < num_previews; ++i) {
                Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 
-               QWidget *preview = new QWidget(this);
+               QWidget *preview = new QWidget(this);  // Will be connected to a layout immediately after the loop.
                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.
@@ -287,14 +336,30 @@ void MainWindow::mixer_created(Mixer *mixer)
                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));
+               QShortcut *shortcut = nullptr;
+               if (i < 9) {
+                       shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
+               } else if (i == 9) {
+                       shortcut = new QShortcut(QKeySequence(Qt::Key_0), this);
+               }
+               if (shortcut != nullptr) {
+                       connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
+               }
+
+               // Hook up the quick-cut key.
+               if (i < strlen(qwerty)) {
+                       QShortcut *shortcut = new QShortcut(QKeySequence(qwerty[i]), this);
+                       connect(shortcut, &QShortcut::activated, bind(&MainWindow::quick_cut_activated, 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));
        }
 
+       // Connect the previews to the correct layout.
+       audio_view_changed(ui->audio_views->currentIndex());
+
        global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
 
        slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
@@ -326,13 +391,13 @@ void MainWindow::mixer_created(Mixer *mixer)
        });
        connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged,
                bind(&MainWindow::gain_staging_knob_changed, this, simple_bus_index, _1));
-       connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
+       connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
                global_audio_mixer->set_gain_staging_auto(simple_bus_index, state == Qt::Checked);
                midi_mapper.refresh_lights();
        });
        connect(ui->compressor_threshold_knob, &QDial::valueChanged,
                bind(&MainWindow::compressor_threshold_knob_changed, this, simple_bus_index, _1));
-       connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this, simple_bus_index](int state){
+       connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
                global_audio_mixer->set_compressor_enabled(simple_bus_index, state == Qt::Checked);
                midi_mapper.refresh_lights();
        });
@@ -366,6 +431,12 @@ void MainWindow::mixer_created(Mixer *mixer)
 
        midi_mapper.refresh_highlights();
        midi_mapper.refresh_lights();
+       midi_mapper.start_thread();
+
+       analyzer.reset(new Analyzer);
+
+       global_mixer->set_theme_menu_callback(bind(&MainWindow::setup_theme_menu, this));
+       setup_theme_menu();
 
        struct sigaction act;
        memset(&act, 0, sizeof(act));
@@ -404,9 +475,17 @@ void MainWindow::reset_audio_mapping_ui()
        setup_audio_expanded_view();
 
        if (simple) {
-               ui->audio_views->setCurrentIndex(0);
+               ui->compact_label->setText("Compact audio view (1/2)  ");
+               ui->video_grid_label->setText("Video grid display (2/2)  ");
+               if (ui->audio_views->currentIndex() == 1) {
+                       // Full audio view is not available in simple mode.
+                       ui->audio_views->setCurrentIndex(0);
+               }
+       } else {
+               ui->compact_label->setText("Compact audio view (1/3)  ");
+               ui->full_label->setText("Full audio view (2/3)  ");
+               ui->video_grid_label->setText("Video grid display (3/3)  ");
        }
-       ui->compact_header->setVisible(!simple);
 
        midi_mapper.refresh_highlights();
        midi_mapper.refresh_lights();
@@ -433,7 +512,7 @@ void MainWindow::setup_audio_miniview()
                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));
+                       QString::fromStdString(get_bus_desc_label(mapping.buses[bus_index])));
                audio_miniviews[bus_index] = ui_audio_miniview;
 
                // Set up the peak meter.
@@ -476,13 +555,14 @@ void MainWindow::setup_audio_expanded_view()
                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));
+                       QString::fromStdString(get_bus_desc_label(mapping.buses[bus_index])));
                audio_expanded_views[bus_index] = ui_audio_expanded_view;
+               update_stereo_knob_and_label(bus_index, lrintf(100.0f * global_audio_mixer->get_stereo_width(bus_index)));
                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_audio_expanded_view->mute_button->setChecked(global_audio_mixer->get_mute(bus_index) ? Qt::Checked : Qt::Unchecked);
+               ui_audio_expanded_view->mute_button->setChecked(global_audio_mixer->get_mute(bus_index));
                connect(ui_audio_expanded_view->mute_button, &QPushButton::toggled,
                        bind(&MainWindow::mute_button_toggled, this, bus_index, _1));
                ui->buses->addWidget(channel);
@@ -493,6 +573,9 @@ void MainWindow::setup_audio_expanded_view()
                        midi_mapper.refresh_lights();
                });
 
+               connect(ui_audio_expanded_view->stereo_width_knob, &QDial::valueChanged,
+                       bind(&MainWindow::stereo_width_knob_changed, this, bus_index, _1));
+
                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,
@@ -536,11 +619,14 @@ void MainWindow::setup_audio_expanded_view()
 
 void MainWindow::mixer_shutting_down()
 {
-       ui->me_live->clean_context();
-       ui->me_preview->clean_context();
+       ui->me_live->shutdown();
+       ui->me_preview->shutdown();
+
        for (Ui::Display *display : previews) {
-               display->display->clean_context();
+               display->display->shutdown();
        }
+
+       analyzer->mixer_shutting_down();
 }
 
 void MainWindow::cut_triggered()
@@ -563,11 +649,25 @@ void MainWindow::exit_triggered()
        close();
 }
 
+void MainWindow::manual_triggered()
+{
+       if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
+               QMessageBox msgbox;
+               msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
+               msgbox.exec();
+       }
+}
+
 void MainWindow::about_triggered()
 {
        AboutDialog().exec();
 }
 
+void MainWindow::open_analyzer_triggered()
+{
+       analyzer->show();
+}
+
 void MainWindow::simple_audio_mode_triggered()
 {
        if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
@@ -620,6 +720,16 @@ void MainWindow::midi_mapping_triggered()
        MIDIMappingDialog(&midi_mapper).exec();
 }
 
+void MainWindow::timecode_stream_triggered()
+{
+       global_mixer->set_display_timecode_in_stream(ui->timecode_stream_action->isChecked());
+}
+
+void MainWindow::timecode_stdout_triggered()
+{
+       global_mixer->set_display_timecode_on_stdout(ui->timecode_stdout_action->isChecked());
+}
+
 void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
 {
        if (bus_index == 0) {
@@ -699,6 +809,14 @@ void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_le
        });
 }
 
+void MainWindow::stereo_width_knob_changed(unsigned bus_index, int value)
+{
+       float stereo_width = value * 0.01f;
+       global_audio_mixer->set_stereo_width(bus_index, stereo_width);
+
+       update_stereo_label(bus_index, value);
+}
+
 void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
 {
        float gain_db = value * 0.1f;
@@ -707,6 +825,34 @@ void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
        update_eq_label(bus_index, band, gain_db);
 }
 
+void MainWindow::update_stereo_knob_and_label(unsigned bus_index, int stereo_width_percent)
+{
+       Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
+
+       if (global_audio_mixer->is_mono(bus_index)) {
+               view->stereo_width_knob->setEnabled(false);
+               view->stereo_width_label->setEnabled(false);
+       } else {
+               view->stereo_width_knob->setEnabled(true);
+               view->stereo_width_label->setEnabled(true);
+       }
+       view->stereo_width_knob->setValue(stereo_width_percent);
+       update_stereo_label(bus_index, stereo_width_percent);
+}
+
+void MainWindow::update_stereo_label(unsigned bus_index, int stereo_width_percent)
+{
+       Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
+
+       if (global_audio_mixer->is_mono(bus_index)) {
+               view->stereo_width_label->setText("Mono");
+       } else {
+               char buf[256];
+               snprintf(buf, sizeof(buf), "Stereo: %d%%", stereo_width_percent);
+               view->stereo_width_label->setText(buf);
+       }
+}
+
 void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
 {
        Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
@@ -726,6 +872,27 @@ void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
        }
 }
 
+void MainWindow::setup_theme_menu()
+{
+       std::vector<Theme::MenuEntry> theme_menu_entries = global_mixer->get_theme_menu();
+
+       if (theme_menu != nullptr) {
+               ui->menuBar->removeAction(theme_menu->menuAction());
+               theme_menu = nullptr;
+       }
+
+       if (!theme_menu_entries.empty()) {
+               theme_menu = new QMenu("&Theme");
+               for (const Theme::MenuEntry &entry : theme_menu_entries) {
+                       QAction *action = theme_menu->addAction(QString::fromStdString(entry.text));
+                       connect(action, &QAction::triggered, [entry] {
+                               global_mixer->theme_menu_entry_clicked(entry.lua_ref);
+                       });
+               }
+               ui->menuBar->insertMenu(ui->menu_Help->menuAction(), theme_menu);
+       }
+}
+
 void MainWindow::limiter_threshold_knob_changed(int value)
 {
        float threshold_dbfs = value * 0.1f;
@@ -829,11 +996,13 @@ void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<Au
                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(bus_levels[0].gain_staging_db * 10.0f));
-               ui->gainstaging_knob->blockSignals(false);
-               ui->gainstaging_db_display->setText(
-                       QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
+               if (!bus_levels.empty()) {
+                       ui->gainstaging_knob->blockSignals(true);
+                       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(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));
@@ -851,13 +1020,17 @@ void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<Au
 void MainWindow::relayout()
 {
        int height = ui->vertical_layout->geometry().height();
+       if (height <= 0) {
+               // Seemingly this can happen and must be ignored.
+               return;
+       }
 
        double remaining_height = height;
 
        // Allocate the height; the most important part is to keep the main displays
-       // at 16:9 if at all possible.
+       // at the right aspect if at all possible.
        double me_width = ui->me_preview->width();
-       double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
+       double me_height = me_width * double(global_flags.height) / double(global_flags.width) + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 
        // TODO: Scale the widths when we need to do this.
        if (me_height / double(height) > 0.8) {
@@ -874,10 +1047,10 @@ void MainWindow::relayout()
        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() +
+       double preview_label_height = previews[0]->label->minimumSize().height() +
                previews[0]->main_vertical_layout->spacing();
        int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
-       double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
+       double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * double(global_flags.height) / double(global_flags.width));
        remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 
        ui->vertical_layout->setStretch(0, lrintf(me_height));
@@ -890,15 +1063,64 @@ void MainWindow::relayout()
        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;
-       for (unsigned i = 0; i < previews.size(); ++i) {
-               ui->preview_displays->setStretch(i, lrintf(preview_width));
-       }
+       if (current_audio_view == 0) {  // Compact audio view.
+               // Set the widths for the previews.
+               double preview_width = preview_height * double(global_flags.width) / double(global_flags.height);
+               for (unsigned i = 0; i < previews.size(); ++i) {
+                       ui->preview_displays->setStretch(i, lrintf(preview_width));
+               }
+
+               // The preview horizontal spacer.
+               double remaining_preview_width = preview_total_width - previews.size() * preview_width;
+               ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
+       } else if (current_audio_view == 2) {  // Video grid view.
+               // QGridLayout doesn't do it for us, since we need to be able to remove rows
+               // or columns as the grid changes, and it won't do that. Thus, position everything
+               // by hand.
+               constexpr int spacing = 6;
+               int grid_width = ui->preview_displays_grid->geometry().width();
+               int grid_height = ui->preview_displays_grid->geometry().height();
+               int best_preview_width = 0;
+               unsigned best_num_rows = 1, best_num_cols = 1;
+               for (unsigned num_rows = 1; num_rows <= previews.size(); ++num_rows) {
+                       int num_cols = (previews.size() + num_rows - 1) / num_rows;
+
+                       int max_preview_height = (grid_height - spacing * (num_rows - 1)) / num_rows - preview_label_height;
+                       int max_preview_width = (grid_width - spacing * (num_cols - 1)) / num_cols;
+                       int preview_width = std::min<int>(max_preview_width, max_preview_height * double(global_flags.width) / double(global_flags.height));
+
+                       if (preview_width > best_preview_width) {
+                               best_preview_width = preview_width;
+                               best_num_rows = num_rows;
+                               best_num_cols = num_cols;
+                       }
+               }
 
-       // The preview horizontal spacer.
-       double remaining_preview_width = preview_total_width - previews.size() * preview_width;
-       ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
+               double cell_height = lrintf(best_preview_width * double(global_flags.height) / double(global_flags.width)) + preview_label_height;
+               remaining_height = grid_height - best_num_rows * cell_height - (best_num_rows - 1) * spacing;
+               int cell_width = best_preview_width;
+               int remaining_width = grid_width - best_num_cols * cell_width - (best_num_cols - 1) * spacing;
+
+               for (unsigned i = 0; i < previews.size(); ++i) {
+                       int col_idx = i % best_num_cols;
+                       int row_idx = i / best_num_cols;
+
+                       double top = remaining_height * 0.5f + row_idx * (cell_height + spacing);
+                       double bottom = top + cell_height;
+                       double left = remaining_width * 0.5f + col_idx * (cell_width + spacing);
+                       double right = left + cell_width;
+
+                       QRect rect;
+                       rect.setTop(lrintf(top));
+                       rect.setBottom(lrintf(bottom));
+                       rect.setLeft(lrintf(left));
+                       rect.setRight(lrintf(right));
+
+                       QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
+                       display->setGeometry(rect);
+                       display->show();
+               }
+       }
 }
 
 void MainWindow::set_locut(float value)
@@ -916,6 +1138,11 @@ void MainWindow::set_makeup_gain(float value)
        set_relative_value(ui->makeup_gain_knob, value);
 }
 
+void MainWindow::set_stereo_width(unsigned bus_idx, float value)
+{
+       set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::stereo_width_knob, value);
+}
+
 void MainWindow::set_treble(unsigned bus_idx, float value)
 {
        set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, value);
@@ -1038,6 +1265,11 @@ void MainWindow::highlight_makeup_gain(bool highlight)
        });
 }
 
+void MainWindow::highlight_stereo_width(unsigned bus_idx, bool highlight)
+{
+       highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::stereo_width_knob, highlight);
+}
+
 void MainWindow::highlight_treble(unsigned bus_idx, bool highlight)
 {
        highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, highlight);
@@ -1210,6 +1442,8 @@ void MainWindow::update_channel_name(Mixer::Output output, const string &name)
                unsigned channel = output - Mixer::OUTPUT_INPUT0;
                previews[channel]->label->setText(name.c_str());
        }
+
+       analyzer->update_channel_name(output, name);
 }
 
 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
@@ -1235,12 +1469,49 @@ void MainWindow::channel_clicked(int channel_number)
        }
 }
 
+void MainWindow::quick_cut_activated(int channel_number)
+{
+       if (!global_flags.enable_quick_cut_keys) {
+               return;
+       }
+       global_mixer->channel_clicked(channel_number);
+       global_mixer->transition_clicked(0);
+}
+
 void MainWindow::wb_button_clicked(int channel_number)
 {
        current_wb_pick_display = channel_number;
        QApplication::setOverrideCursor(Qt::CrossCursor);
 }
 
+void MainWindow::audio_view_changed(int audio_view)
+{
+       if (audio_view == current_audio_view) {
+               return;
+       }
+
+       if (audio_view == 0) {
+               // Compact audio view. (1, full audio view, has no video previews.)
+               for (unsigned i = 0; i < previews.size(); ++i) {
+                       QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
+                       ui->preview_displays->insertWidget(i, display, 1);
+               }
+       } else if (audio_view == 2) {
+               // Video grid display.
+               for (unsigned i = 0; i < previews.size(); ++i) {
+                       QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
+                       display->setParent(ui->preview_displays_grid);
+                       display->show();
+               }
+       }
+
+       current_audio_view = audio_view;
+
+       // Ask for a relayout, but only after the event loop is done doing relayout
+       // on everything else.
+       QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
+}
+
 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 {
        if (current_wb_pick_display != -1 &&
@@ -1249,7 +1520,9 @@ bool MainWindow::eventFilter(QObject *watched, QEvent *event)
                QApplication::restoreOverrideCursor();
                if (watched == previews[current_wb_pick_display]->display) {
                        const QMouseEvent *mouse_event = (QMouseEvent *)event;
-                       set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
+                       previews[current_wb_pick_display]->display->grab_white_balance(
+                               current_wb_pick_display,
+                               mouse_event->x(), mouse_event->y());
                } else {
                        // The user clicked on something else, give up.
                        // (The click goes through, which might not be ideal, but, yes.)
@@ -1259,54 +1532,35 @@ bool MainWindow::eventFilter(QObject *watched, QEvent *event)
        return false;
 }
 
-namespace {
-
-double srgb_to_linear(double x)
+void MainWindow::closeEvent(QCloseEvent *event)
 {
-       if (x < 0.04045) {
-               return x / 12.92;
-       } else {
-               return pow((x + 0.055) / 1.055, 2.4);
+       if (global_mixer->get_num_connected_clients() > 0) {
+               QMessageBox::StandardButton reply =
+                       QMessageBox::question(this, "Nageru", "There are clients connected. Do you really want to quit?",
+                               QMessageBox::Yes | QMessageBox::No);
+               if (reply != QMessageBox::Yes) {
+                       event->ignore();
+                       return;
+               }
        }
-}
 
-}  // namespace
-
-void MainWindow::set_white_balance(int channel_number, int x, int y)
-{
-       // Set the white balance to neutral for the grab. It's probably going to
-       // flicker a bit, but hopefully this display is not live anyway.
-       global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
-       previews[channel_number]->display->updateGL();
-       QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
-
-       double r = srgb_to_linear(qRed(reference_color) / 255.0);
-       double g = srgb_to_linear(qGreen(reference_color) / 255.0);
-       double b = srgb_to_linear(qBlue(reference_color) / 255.0);
-       global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
-       previews[channel_number]->display->updateGL();
+       analyzer->hide();
+       event->accept();
 }
 
 void MainWindow::audio_state_changed()
 {
        post_to_main_thread([this]{
+               if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
+                       return;
+               }
                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)";
-                               }
-                       }
-
+                       string label = get_bus_desc_label(mapping.buses[bus_index]);
                        audio_miniviews[bus_index]->bus_desc_label->setFullText(
-                               QString::fromStdString(bus.name + suffix));
+                               QString::fromStdString(label));
                        audio_expanded_views[bus_index]->bus_desc_label->setFullText(
-                               QString::fromStdString(bus.name + suffix));
+                               QString::fromStdString(label));
                }
        });
 }