]> git.sesse.net Git - nageru/blob - nageru/mainwindow.cpp
Factor out estimated time left calculation into its own function.
[nageru] / nageru / mainwindow.cpp
1 #include "mainwindow.h"
2
3 #include <assert.h>
4 #include <signal.h>
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <string.h>
8 #include <QAbstractButton>
9 #include <QAbstractSlider>
10 #include <QAction>
11 #include <QActionGroup>
12 #include <QApplication>
13 #include <QBoxLayout>
14 #include <QCheckBox>
15 #include <QDesktopServices>
16 #include <QDial>
17 #include <QDialog>
18 #include <QEvent>
19 #include <QFlags>
20 #include <QFrame>
21 #include <QImage>
22 #include <QInputDialog>
23 #include <QKeySequence>
24 #include <QLabel>
25 #include <QLayoutItem>
26 #include <QMenuBar>
27 #include <QMessageBox>
28 #include <QMouseEvent>
29 #include <QObject>
30 #include <QPushButton>
31 #include <QRect>
32 #include <QRgb>
33 #include <QShortcut>
34 #include <QStackedWidget>
35 #include <QToolButton>
36 #include <QWidget>
37 #include <algorithm>
38 #include <chrono>
39 #include <cmath>
40 #include <functional>
41 #include <limits>
42 #include <memory>
43 #include <ratio>
44 #include <string>
45 #include <vector>
46
47 #include "shared/aboutdialog.h"
48 #include "alsa_pool.h"
49 #include "analyzer.h"
50 #include "clickable_label.h"
51 #include "context_menus.h"
52 #include "correlation_meter.h"
53 #include "shared/disk_space_estimator.h"
54 #include "ellipsis_label.h"
55 #include "flags.h"
56 #include "glwidget.h"
57 #include "input_mapping.h"
58 #include "input_mapping_dialog.h"
59 #include "lrameter.h"
60 #include "midi_mapping.pb.h"
61 #include "midi_mapping_dialog.h"
62 #include "mixer.h"
63 #include "nonlinear_fader.h"
64 #include "shared/post_to_main_thread.h"
65 #include "ui_audio_expanded_view.h"
66 #include "ui_audio_miniview.h"
67 #include "ui_display.h"
68 #include "ui_mainwindow.h"
69 #include "vumeter.h"
70
71 using namespace std;
72 using namespace std::chrono;
73 using namespace std::placeholders;
74
75 Q_DECLARE_METATYPE(std::string);
76 Q_DECLARE_METATYPE(std::vector<std::string>);
77
78 MainWindow *global_mainwindow = nullptr;
79
80 // -0.1 dBFS is EBU peak limit. We use it consistently, even for the bus meters
81 // (which don't calculate interpolate peak, and in general don't follow EBU recommendations).
82 constexpr float peak_limit_dbfs = -0.1f;
83
84 namespace {
85
86 void schedule_cut_signal(int ignored)
87 {
88         global_mixer->schedule_cut();
89 }
90
91 void quit_signal(int ignored)
92 {
93         global_mainwindow->close();
94 }
95
96 void slave_knob(QDial *master, QDial *slave)
97 {
98         QWidget::connect(master, &QDial::valueChanged, [slave](int value){
99                 slave->blockSignals(true);
100                 slave->setValue(value);
101                 slave->blockSignals(false);
102         });
103         QWidget::connect(slave, &QDial::valueChanged, [master](int value){
104                 master->setValue(value);
105         });
106 }
107
108 void slave_checkbox(QCheckBox *master, QCheckBox *slave)
109 {
110         QWidget::connect(master, &QCheckBox::stateChanged, [slave](int state){
111                 slave->blockSignals(true);
112                 slave->setCheckState(Qt::CheckState(state));
113                 slave->blockSignals(false);
114         });
115         QWidget::connect(slave, &QCheckBox::stateChanged, [master](int state){
116                 master->setCheckState(Qt::CheckState(state));
117         });
118 }
119
120 void slave_fader(NonLinearFader *master, NonLinearFader *slave)
121 {
122         QWidget::connect(master, &NonLinearFader::dbValueChanged, [slave](double value) {
123                 slave->blockSignals(true);
124                 slave->setDbValue(value);
125                 slave->blockSignals(false);
126         });
127         QWidget::connect(slave, &NonLinearFader::dbValueChanged, [master](double value){
128                 master->setDbValue(value);
129         });
130 }
131
132 constexpr unsigned DB_WITH_SIGN = 0x1;
133 constexpr unsigned DB_BARE = 0x2;
134
135 string format_db(double db, unsigned flags)
136 {
137         string text;
138         if (flags & DB_WITH_SIGN) {
139                 if (isfinite(db)) {
140                         char buf[256];
141                         snprintf(buf, sizeof(buf), "%+.1f", db);
142                         text = buf;
143                 } else if (db < 0.0) {
144                         text = "-∞";
145                 } else {
146                         // Should never happen, really.
147                         text = "+∞";
148                 }
149         } else {
150                 if (isfinite(db)) {
151                         char buf[256];
152                         snprintf(buf, sizeof(buf), "%.1f", db);
153                         text = buf;
154                 } else if (db < 0.0) {
155                         text = "-∞";
156                 } else {
157                         // Should never happen, really.
158                         text = "∞";
159                 }
160         }
161         if (!(flags & DB_BARE)) {
162                 text += " dB";
163         }
164         return text;
165 }
166
167 void set_peak_label(QLabel *peak_label, float peak_db)
168 {
169         peak_label->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
170
171         if (peak_db > peak_limit_dbfs) {
172                 peak_label->setStyleSheet("QLabel { background-color: red; color: white; }");
173         } else {
174                 peak_label->setStyleSheet("");
175         }
176 }
177
178 string get_bus_desc_label(const InputMapping::Bus &bus)
179 {
180         string suffix;
181         if (bus.device.type == InputSourceType::ALSA_INPUT) {
182                 ALSAPool::Device::State state = global_audio_mixer->get_alsa_card_state(bus.device.index);
183                 if (state == ALSAPool::Device::State::STARTING) {
184                         suffix = " (busy)";
185                 } else if (state == ALSAPool::Device::State::DEAD) {
186                         suffix = " (dead)";
187                 }
188         }
189
190         return bus.name + suffix;
191 }
192
193 }  // namespace
194
195 MainWindow::MainWindow()
196         : ui(new Ui::MainWindow), midi_mapper(this)
197 {
198         global_mainwindow = this;
199         ui->setupUi(this);
200
201         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
202         disk_free_label = new QLabel(this);
203         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
204         ui->menuBar->setCornerWidget(disk_free_label);
205
206         QActionGroup *audio_mapping_group = new QActionGroup(this);
207         ui->simple_audio_mode->setActionGroup(audio_mapping_group);
208         ui->multichannel_audio_mode->setActionGroup(audio_mapping_group);
209
210         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
211         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
212
213         // The menus.
214         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
215         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
216         connect(ui->manual_action, &QAction::triggered, this, &MainWindow::manual_triggered);
217         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
218         connect(ui->open_analyzer_action, &QAction::triggered, this, &MainWindow::open_analyzer_triggered);
219         connect(ui->simple_audio_mode, &QAction::triggered, this, &MainWindow::simple_audio_mode_triggered);
220         connect(ui->multichannel_audio_mode, &QAction::triggered, this, &MainWindow::multichannel_audio_mode_triggered);
221         connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
222         connect(ui->midi_mapping_action, &QAction::triggered, this, &MainWindow::midi_mapping_triggered);
223         connect(ui->timecode_stream_action, &QAction::triggered, this, &MainWindow::timecode_stream_triggered);
224         connect(ui->timecode_stdout_action, &QAction::triggered, this, &MainWindow::timecode_stdout_triggered);
225
226         ui->timecode_stream_action->setChecked(global_flags.display_timecode_in_stream);
227         ui->timecode_stdout_action->setChecked(global_flags.display_timecode_on_stdout);
228
229         if (global_flags.x264_video_to_http && isinf(global_flags.x264_crf)) {
230                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
231         } else {
232                 ui->x264_bitrate_action->setEnabled(false);
233         }
234
235         connect(ui->video_menu, &QMenu::aboutToShow, [this]{
236                 fill_hdmi_sdi_output_device_menu(ui->hdmi_sdi_output_device_menu);
237                 fill_hdmi_sdi_output_resolution_menu(ui->hdmi_sdi_output_resolution_menu);
238         });
239
240         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
241         // TODO: Make them dynamic.
242         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
243         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
244         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
245
246         // Aiee...
247         transition_btn1 = ui->transition_btn1;
248         transition_btn2 = ui->transition_btn2;
249         transition_btn3 = ui->transition_btn3;
250         qRegisterMetaType<string>("std::string");
251         qRegisterMetaType<vector<string>>("std::vector<std::string>");
252         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
253         qRegisterMetaType<Mixer::Output>("Mixer::Output");
254
255         // Hook up the prev/next buttons on the audio views.
256         auto prev_page = [this]{
257                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
258                         ui->audio_views->setCurrentIndex((ui->audio_views->currentIndex() + 2) % 3);
259                 } else {
260                         ui->audio_views->setCurrentIndex(2 - ui->audio_views->currentIndex());  // Switch between 0 and 2.
261                 }
262         };
263         auto next_page = [this]{
264                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
265                         ui->audio_views->setCurrentIndex((ui->audio_views->currentIndex() + 1) % 3);
266                 } else {
267                         ui->audio_views->setCurrentIndex(2 - ui->audio_views->currentIndex());  // Switch between 0 and 2.
268                 }
269         };
270         connect(ui->compact_prev_page, &QAbstractButton::clicked, prev_page);
271         connect(ui->compact_next_page, &QAbstractButton::clicked, next_page);
272         connect(ui->full_prev_page, &QAbstractButton::clicked, prev_page);
273         connect(ui->full_next_page, &QAbstractButton::clicked, next_page);
274         connect(ui->video_grid_prev_page, &QAbstractButton::clicked, prev_page);
275         connect(ui->video_grid_next_page, &QAbstractButton::clicked, next_page);
276
277         // And bind the same to PgUp/PgDown.
278         connect(new QShortcut(QKeySequence::MoveToNextPage, this), &QShortcut::activated, next_page);
279         connect(new QShortcut(QKeySequence::MoveToPreviousPage, this), &QShortcut::activated, prev_page);
280
281         // When the audio view changes, move the previews.
282         connect(ui->audio_views, &QStackedWidget::currentChanged, bind(&MainWindow::audio_view_changed, this, _1));
283
284         if (global_flags.enable_quick_cut_keys) {
285                 ui->quick_cut_enable_action->setChecked(true);
286         }
287         connect(ui->quick_cut_enable_action, &QAction::changed, [this](){
288                 global_flags.enable_quick_cut_keys = ui->quick_cut_enable_action->isChecked();
289         });
290
291         last_audio_level_callback = steady_clock::now() - seconds(1);
292
293         if (!global_flags.midi_mapping_filename.empty()) {
294                 MIDIMappingProto midi_mapping;
295                 if (!load_midi_mapping_from_file(global_flags.midi_mapping_filename, &midi_mapping)) {
296                         fprintf(stderr, "Couldn't load MIDI mapping '%s'; exiting.\n",
297                                 global_flags.midi_mapping_filename.c_str());
298                         exit(1);
299                 }
300                 midi_mapper.set_midi_mapping(midi_mapping);
301         }
302         midi_mapper.refresh_highlights();
303         midi_mapper.refresh_lights();
304         if (global_flags.fullscreen) {
305                 QMainWindow::showFullScreen();
306         }
307 }
308
309 void MainWindow::resizeEvent(QResizeEvent* event)
310 {
311         QMainWindow::resizeEvent(event);
312
313         // Ask for a relayout, but only after the event loop is done doing relayout
314         // on everything else.
315         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
316 }
317
318 void MainWindow::mixer_created(Mixer *mixer)
319 {
320         // Make the previews.
321         unsigned num_previews = mixer->get_num_channels();
322
323         const char qwerty[] = "QWERTYUIOP";
324         for (unsigned i = 0; i < num_previews; ++i) {
325                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
326
327                 QWidget *preview = new QWidget(this);  // Will be connected to a layout immediately after the loop.
328                 Ui::Display *ui_display = new Ui::Display;
329                 ui_display->setupUi(preview);
330                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
331                 ui_display->display->set_output(output);
332                 previews.push_back(ui_display);
333
334                 // Hook up the click.
335                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
336
337                 // Let the theme update the text whenever the resolution or color changed.
338                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
339                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
340
341                 // Hook up the keyboard key.
342                 QShortcut *shortcut = nullptr;
343                 if (i < 9) {
344                         shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
345                 } else if (i == 9) {
346                         shortcut = new QShortcut(QKeySequence(Qt::Key_0), this);
347                 }
348                 if (shortcut != nullptr) {
349                         connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
350                 }
351
352                 // Hook up the quick-cut key.
353                 if (i < strlen(qwerty)) {
354                         QShortcut *shortcut = new QShortcut(QKeySequence(qwerty[i]), this);
355                         connect(shortcut, &QShortcut::activated, bind(&MainWindow::quick_cut_activated, this, i));
356                 }
357
358                 // Hook up the white balance button (irrelevant if invisible).
359                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
360                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
361         }
362
363         // Connect the previews to the correct layout.
364         audio_view_changed(ui->audio_views->currentIndex());
365
366         global_audio_mixer->set_state_changed_callback(bind(&MainWindow::audio_state_changed, this));
367
368         slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
369         slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
370         slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
371         slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
372         slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
373
374         reset_audio_mapping_ui();
375
376         // TODO: Fetch all of the values these for completeness,
377         // not just the enable knobs implied by flags.
378         ui->limiter_enabled->setChecked(global_audio_mixer->get_limiter_enabled());
379         ui->makeup_gain_auto_checkbox->setChecked(global_audio_mixer->get_final_makeup_gain_auto());
380
381         // Controls used only for simple audio fetch their state from the first bus.
382         constexpr unsigned simple_bus_index = 0;
383         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
384                 ui->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(simple_bus_index));
385                 ui->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(simple_bus_index));
386                 ui->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(simple_bus_index));
387                 ui->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(simple_bus_index));
388                 ui->compressor_threshold_db_display->setText(
389                         QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(simple_bus_index), DB_WITH_SIGN)));
390         }
391         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
392                 global_audio_mixer->set_locut_enabled(simple_bus_index, state == Qt::Checked);
393                 midi_mapper.refresh_lights();
394         });
395         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged,
396                 bind(&MainWindow::gain_staging_knob_changed, this, simple_bus_index, _1));
397         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
398                 global_audio_mixer->set_gain_staging_auto(simple_bus_index, state == Qt::Checked);
399                 midi_mapper.refresh_lights();
400         });
401         connect(ui->compressor_threshold_knob, &QDial::valueChanged,
402                 bind(&MainWindow::compressor_threshold_knob_changed, this, simple_bus_index, _1));
403         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
404                 global_audio_mixer->set_compressor_enabled(simple_bus_index, state == Qt::Checked);
405                 midi_mapper.refresh_lights();
406         });
407
408         // Global mastering controls.
409         QString limiter_threshold_label(
410                 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
411         ui->limiter_threshold_db_display->setText(limiter_threshold_label);
412         ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
413
414         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
415         cutoff_knob_changed(ui->locut_cutoff_knob->value());
416
417         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
418         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
419                 global_audio_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
420                 midi_mapper.refresh_lights();
421         });
422
423         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
424         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
425                 global_audio_mixer->set_limiter_enabled(state == Qt::Checked);
426                 midi_mapper.refresh_lights();
427         });
428         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
429         // Even though we have a reset button right next to it, the fact that
430         // the expanded audio view labels are clickable makes it natural to
431         // click this one as well.
432         connect(ui->peak_display, &ClickableLabel::clicked, this, &MainWindow::reset_meters_button_clicked);
433         mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
434
435         midi_mapper.refresh_highlights();
436         midi_mapper.refresh_lights();
437         midi_mapper.start_thread();
438
439         analyzer.reset(new Analyzer);
440
441         global_mixer->set_theme_menu_callback(bind(&MainWindow::setup_theme_menu, this));
442         setup_theme_menu();
443
444         struct sigaction act;
445         memset(&act, 0, sizeof(act));
446         act.sa_handler = schedule_cut_signal;
447         act.sa_flags = SA_RESTART;
448         sigaction(SIGHUP, &act, nullptr);
449
450         // Mostly for debugging. Don't override SIGINT, that's so evil if
451         // shutdown isn't instant.
452         memset(&act, 0, sizeof(act));
453         act.sa_handler = quit_signal;
454         act.sa_flags = SA_RESTART;
455         sigaction(SIGUSR1, &act, nullptr);
456 }
457
458 void MainWindow::reset_audio_mapping_ui()
459 {
460         bool simple = (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE);
461
462         ui->simple_audio_mode->setChecked(simple);
463         ui->multichannel_audio_mode->setChecked(!simple);
464         ui->input_mapping_action->setEnabled(!simple);
465         ui->midi_mapping_action->setEnabled(!simple);
466
467         ui->locut_enabled->setVisible(simple);
468         ui->gainstaging_label->setVisible(simple);
469         ui->gainstaging_knob->setVisible(simple);
470         ui->gainstaging_db_display->setVisible(simple);
471         ui->gainstaging_auto_checkbox->setVisible(simple);
472         ui->compressor_threshold_label->setVisible(simple);
473         ui->compressor_threshold_knob->setVisible(simple);
474         ui->compressor_threshold_db_display->setVisible(simple);
475         ui->compressor_enabled->setVisible(simple);
476
477         setup_audio_miniview();
478         setup_audio_expanded_view();
479
480         if (simple) {
481                 ui->compact_label->setText("Compact audio view (1/2)  ");
482                 ui->video_grid_label->setText("Video grid display (2/2)  ");
483                 if (ui->audio_views->currentIndex() == 1) {
484                         // Full audio view is not available in simple mode.
485                         ui->audio_views->setCurrentIndex(0);
486                 }
487         } else {
488                 ui->compact_label->setText("Compact audio view (1/3)  ");
489                 ui->full_label->setText("Full audio view (2/3)  ");
490                 ui->video_grid_label->setText("Video grid display (3/3)  ");
491         }
492
493         midi_mapper.refresh_highlights();
494         midi_mapper.refresh_lights();
495 }
496
497 void MainWindow::setup_audio_miniview()
498 {
499         // Remove any existing channels.
500         for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
501                 delete item->widget();
502                 delete item;
503         }
504         audio_miniviews.clear();
505
506         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
507                 return;
508         }
509
510         // Set up brand new ones from the input mapping.
511         InputMapping mapping = global_audio_mixer->get_input_mapping();
512         audio_miniviews.resize(mapping.buses.size());
513         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
514                 QWidget *channel = new QWidget(this);
515                 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
516                 ui_audio_miniview->setupUi(channel);
517                 ui_audio_miniview->bus_desc_label->setFullText(
518                         QString::fromStdString(get_bus_desc_label(mapping.buses[bus_index])));
519                 audio_miniviews[bus_index] = ui_audio_miniview;
520
521                 // Set up the peak meter.
522                 VUMeter *peak_meter = ui_audio_miniview->peak_meter;
523                 peak_meter->set_min_level(-30.0f);
524                 peak_meter->set_max_level(0.0f);
525                 peak_meter->set_ref_level(0.0f);
526
527                 ui_audio_miniview->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
528
529                 ui->faders->addWidget(channel);
530
531                 connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
532                         bind(&MainWindow::mini_fader_changed, this, bus_index, _1));
533                 connect(ui_audio_miniview->peak_display_label, &ClickableLabel::clicked,
534                         [bus_index]() {
535                                 global_audio_mixer->reset_peak(bus_index);
536                         });
537         }
538 }
539
540 void MainWindow::setup_audio_expanded_view()
541 {
542         // Remove any existing channels.
543         for (QLayoutItem *item; (item = ui->buses->takeAt(0)) != nullptr; ) {
544                 delete item->widget();
545                 delete item;
546         }
547         audio_expanded_views.clear();
548
549         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
550                 return;
551         }
552
553         // Set up brand new ones from the input mapping.
554         InputMapping mapping = global_audio_mixer->get_input_mapping();
555         audio_expanded_views.resize(mapping.buses.size());
556         for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
557                 QWidget *channel = new QWidget(this);
558                 Ui::AudioExpandedView *ui_audio_expanded_view = new Ui::AudioExpandedView;
559                 ui_audio_expanded_view->setupUi(channel);
560                 ui_audio_expanded_view->bus_desc_label->setFullText(
561                         QString::fromStdString(get_bus_desc_label(mapping.buses[bus_index])));
562                 audio_expanded_views[bus_index] = ui_audio_expanded_view;
563                 update_stereo_knob_and_label(bus_index, lrintf(100.0f * global_audio_mixer->get_stereo_width(bus_index)));
564                 update_eq_label(bus_index, EQ_BAND_TREBLE, global_audio_mixer->get_eq(bus_index, EQ_BAND_TREBLE));
565                 update_eq_label(bus_index, EQ_BAND_MID, global_audio_mixer->get_eq(bus_index, EQ_BAND_MID));
566                 update_eq_label(bus_index, EQ_BAND_BASS, global_audio_mixer->get_eq(bus_index, EQ_BAND_BASS));
567                 ui_audio_expanded_view->fader->setDbValue(global_audio_mixer->get_fader_volume(bus_index));
568                 ui_audio_expanded_view->mute_button->setChecked(global_audio_mixer->get_mute(bus_index));
569                 connect(ui_audio_expanded_view->mute_button, &QPushButton::toggled,
570                         bind(&MainWindow::mute_button_toggled, this, bus_index, _1));
571                 ui->buses->addWidget(channel);
572
573                 ui_audio_expanded_view->locut_enabled->setChecked(global_audio_mixer->get_locut_enabled(bus_index));
574                 connect(ui_audio_expanded_view->locut_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
575                         global_audio_mixer->set_locut_enabled(bus_index, state == Qt::Checked);
576                         midi_mapper.refresh_lights();
577                 });
578
579                 connect(ui_audio_expanded_view->stereo_width_knob, &QDial::valueChanged,
580                         bind(&MainWindow::stereo_width_knob_changed, this, bus_index, _1));
581
582                 connect(ui_audio_expanded_view->treble_knob, &QDial::valueChanged,
583                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_TREBLE, _1));
584                 connect(ui_audio_expanded_view->mid_knob, &QDial::valueChanged,
585                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_MID, _1));
586                 connect(ui_audio_expanded_view->bass_knob, &QDial::valueChanged,
587                         bind(&MainWindow::eq_knob_changed, this, bus_index, EQ_BAND_BASS, _1));
588
589                 ui_audio_expanded_view->gainstaging_knob->setValue(global_audio_mixer->get_gain_staging_db(bus_index));
590                 ui_audio_expanded_view->gainstaging_auto_checkbox->setChecked(global_audio_mixer->get_gain_staging_auto(bus_index));
591                 ui_audio_expanded_view->compressor_enabled->setChecked(global_audio_mixer->get_compressor_enabled(bus_index));
592
593                 connect(ui_audio_expanded_view->gainstaging_knob, &QAbstractSlider::valueChanged, bind(&MainWindow::gain_staging_knob_changed, this, bus_index, _1));
594                 connect(ui_audio_expanded_view->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this, bus_index](int state){
595                         global_audio_mixer->set_gain_staging_auto(bus_index, state == Qt::Checked);
596                         midi_mapper.refresh_lights();
597                 });
598
599                 connect(ui_audio_expanded_view->compressor_threshold_knob, &QDial::valueChanged, bind(&MainWindow::compressor_threshold_knob_changed, this, bus_index, _1));
600                 connect(ui_audio_expanded_view->compressor_enabled, &QCheckBox::stateChanged, [this, bus_index](int state){
601                         global_audio_mixer->set_compressor_enabled(bus_index, state == Qt::Checked);
602                         midi_mapper.refresh_lights();
603                 });
604
605                 slave_fader(audio_miniviews[bus_index]->fader, ui_audio_expanded_view->fader);
606
607                 // Set up the peak meter.
608                 VUMeter *peak_meter = ui_audio_expanded_view->peak_meter;
609                 peak_meter->set_min_level(-30.0f);
610                 peak_meter->set_max_level(0.0f);
611                 peak_meter->set_ref_level(0.0f);
612
613                 connect(ui_audio_expanded_view->peak_display_label, &ClickableLabel::clicked,
614                         [this, bus_index]() {
615                                 global_audio_mixer->reset_peak(bus_index);
616                                 midi_mapper.refresh_lights();
617                         });
618         }
619
620         update_cutoff_labels(global_audio_mixer->get_locut_cutoff());
621 }
622
623 void MainWindow::mixer_shutting_down()
624 {
625         ui->me_live->shutdown();
626         ui->me_preview->shutdown();
627
628         for (Ui::Display *display : previews) {
629                 display->display->shutdown();
630         }
631
632         analyzer->mixer_shutting_down();
633 }
634
635 void MainWindow::cut_triggered()
636 {
637         global_mixer->schedule_cut();
638 }
639
640 void MainWindow::x264_bitrate_triggered()
641 {
642         bool ok;
643         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);
644         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
645                 global_flags.x264_bitrate = new_bitrate;
646                 global_mixer->change_x264_bitrate(new_bitrate);
647         }
648 }
649
650 void MainWindow::exit_triggered()
651 {
652         close();
653 }
654
655 void MainWindow::manual_triggered()
656 {
657         if (!QDesktopServices::openUrl(QUrl("https://nageru.sesse.net/doc/"))) {
658                 QMessageBox msgbox;
659                 msgbox.setText("Could not launch manual in web browser.\nPlease see https://nageru.sesse.net/doc/ manually.");
660                 msgbox.exec();
661         }
662 }
663
664 void MainWindow::about_triggered()
665 {
666         AboutDialog("Nageru", "Realtime video mixer").exec();
667 }
668
669 void MainWindow::open_analyzer_triggered()
670 {
671         analyzer->show();
672 }
673
674 void MainWindow::simple_audio_mode_triggered()
675 {
676         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
677                 return;
678         }
679         unsigned card_index = global_audio_mixer->get_simple_input();
680         if (card_index == numeric_limits<unsigned>::max()) {
681                 QMessageBox::StandardButton reply =
682                         QMessageBox::question(this,
683                                 "Mapping too complex",
684                                 "The current audio mapping is too complicated to be representable in simple mode, "
685                                         "and will be discarded if you proceed. Really go to simple audio mode?",
686                                 QMessageBox::Yes | QMessageBox::No);
687                 if (reply == QMessageBox::No) {
688                         ui->simple_audio_mode->setChecked(false);
689                         ui->multichannel_audio_mode->setChecked(true);
690                         return;
691                 }
692                 card_index = 0;
693         }
694         global_audio_mixer->set_simple_input(/*card_index=*/card_index);
695         reset_audio_mapping_ui();
696 }
697
698 void MainWindow::multichannel_audio_mode_triggered()
699 {
700         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
701                 return;
702         }
703
704         // Take the generated input mapping from the simple input,
705         // and set it as a normal multichannel mapping, which causes
706         // the mode to go to multichannel.
707         global_audio_mixer->set_input_mapping(global_audio_mixer->get_input_mapping());
708         reset_audio_mapping_ui();
709 }
710
711 void MainWindow::input_mapping_triggered()
712 {
713         if (InputMappingDialog().exec() == QDialog::Accepted) {
714                 setup_audio_miniview();
715                 setup_audio_expanded_view();
716         }
717         midi_mapper.refresh_highlights();
718         midi_mapper.refresh_lights();
719 }
720
721 void MainWindow::midi_mapping_triggered()
722 {
723         MIDIMappingDialog(&midi_mapper).exec();
724 }
725
726 void MainWindow::timecode_stream_triggered()
727 {
728         global_mixer->set_display_timecode_in_stream(ui->timecode_stream_action->isChecked());
729 }
730
731 void MainWindow::timecode_stdout_triggered()
732 {
733         global_mixer->set_display_timecode_on_stdout(ui->timecode_stdout_action->isChecked());
734 }
735
736 void MainWindow::gain_staging_knob_changed(unsigned bus_index, int value)
737 {
738         if (bus_index == 0) {
739                 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
740         }
741         if (bus_index < audio_expanded_views.size()) {
742                 audio_expanded_views[bus_index]->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
743         }
744
745         float gain_db = value * 0.1f;
746         global_audio_mixer->set_gain_staging_db(bus_index, gain_db);
747
748         // The label will be updated by the audio level callback.
749 }
750
751 void MainWindow::final_makeup_gain_knob_changed(int value)
752 {
753         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
754
755         float gain_db = value * 0.1f;
756         global_audio_mixer->set_final_makeup_gain_db(gain_db);
757
758         // The label will be updated by the audio level callback.
759 }
760
761 void MainWindow::cutoff_knob_changed(int value)
762 {
763         float octaves = value * 0.1f;
764         float cutoff_hz = 20.0 * pow(2.0, octaves);
765         global_audio_mixer->set_locut_cutoff(cutoff_hz);
766         update_cutoff_labels(cutoff_hz);
767 }
768
769 void MainWindow::update_cutoff_labels(float cutoff_hz)
770 {
771         char buf[256];
772         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
773         ui->locut_cutoff_display->setText(buf);
774         ui->locut_cutoff_display_2->setText(buf);
775
776         for (unsigned bus_index = 0; bus_index < audio_expanded_views.size(); ++bus_index) {
777                 audio_expanded_views[bus_index]->locut_enabled->setText(
778                         QString("Lo-cut: ") + buf);
779         }
780 }
781
782 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
783 {
784         char time_str[256];
785         if (estimated_seconds_left < 60.0) {
786                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
787         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
788                 int s = lrintf(estimated_seconds_left);
789                 int m = s / 60;
790                 s %= 60;
791                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
792         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
793                 int m = lrintf(estimated_seconds_left / 60.0);
794                 snprintf(time_str, sizeof(time_str), "%dm", m);
795         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
796                 int m = lrintf(estimated_seconds_left / 60.0);
797                 int h = m / 60;
798                 m %= 60;
799                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
800         } else {  // More than ten hours: Xh.
801                 int h = lrintf(estimated_seconds_left / 3600.0);
802                 snprintf(time_str, sizeof(time_str), "%dh", h);
803         }
804         char buf[256];
805         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
806
807         std::string label = buf;
808
809         post_to_main_thread([this, label]{
810                 disk_free_label->setText(QString::fromStdString(label));
811                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
812         });
813 }
814
815 void MainWindow::stereo_width_knob_changed(unsigned bus_index, int value)
816 {
817         float stereo_width = value * 0.01f;
818         global_audio_mixer->set_stereo_width(bus_index, stereo_width);
819
820         update_stereo_label(bus_index, value);
821 }
822
823 void MainWindow::eq_knob_changed(unsigned bus_index, EQBand band, int value)
824 {
825         float gain_db = value * 0.1f;
826         global_audio_mixer->set_eq(bus_index, band, gain_db);
827
828         update_eq_label(bus_index, band, gain_db);
829 }
830
831 void MainWindow::update_stereo_knob_and_label(unsigned bus_index, int stereo_width_percent)
832 {
833         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
834
835         if (global_audio_mixer->is_mono(bus_index)) {
836                 view->stereo_width_knob->setEnabled(false);
837                 view->stereo_width_label->setEnabled(false);
838         } else {
839                 view->stereo_width_knob->setEnabled(true);
840                 view->stereo_width_label->setEnabled(true);
841         }
842         view->stereo_width_knob->setValue(stereo_width_percent);
843         update_stereo_label(bus_index, stereo_width_percent);
844 }
845
846 void MainWindow::update_stereo_label(unsigned bus_index, int stereo_width_percent)
847 {
848         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
849
850         if (global_audio_mixer->is_mono(bus_index)) {
851                 view->stereo_width_label->setText("Mono");
852         } else {
853                 char buf[256];
854                 snprintf(buf, sizeof(buf), "Stereo: %d%%", stereo_width_percent);
855                 view->stereo_width_label->setText(buf);
856         }
857 }
858
859 void MainWindow::update_eq_label(unsigned bus_index, EQBand band, float gain_db)
860 {
861         Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
862         string db_string = format_db(gain_db, DB_WITH_SIGN);
863         switch (band) {
864         case EQ_BAND_TREBLE:
865                 view->treble_label->setText(QString::fromStdString("Treble: " + db_string));
866                 break;
867         case EQ_BAND_MID:
868                 view->mid_label->setText(QString::fromStdString("Mid: " + db_string));
869                 break;
870         case EQ_BAND_BASS:
871                 view->bass_label->setText(QString::fromStdString("Bass: " + db_string));
872                 break;
873         default:
874                 assert(false);
875         }
876 }
877
878 void MainWindow::setup_theme_menu()
879 {
880         std::vector<Theme::MenuEntry> theme_menu_entries = global_mixer->get_theme_menu();
881
882         if (theme_menu != nullptr) {
883                 ui->menuBar->removeAction(theme_menu->menuAction());
884                 theme_menu = nullptr;
885         }
886
887         if (!theme_menu_entries.empty()) {
888                 theme_menu = new QMenu("&Theme");
889                 for (const Theme::MenuEntry &entry : theme_menu_entries) {
890                         QAction *action = theme_menu->addAction(QString::fromStdString(entry.text));
891                         connect(action, &QAction::triggered, [entry] {
892                                 global_mixer->theme_menu_entry_clicked(entry.lua_ref);
893                         });
894                 }
895                 ui->menuBar->insertMenu(ui->menu_Help->menuAction(), theme_menu);
896         }
897 }
898
899 void MainWindow::limiter_threshold_knob_changed(int value)
900 {
901         float threshold_dbfs = value * 0.1f;
902         global_audio_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
903         ui->limiter_threshold_db_display->setText(
904                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
905         ui->limiter_threshold_db_display_2->setText(
906                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
907 }
908
909 void MainWindow::compressor_threshold_knob_changed(unsigned bus_index, int value)
910 {
911         float threshold_dbfs = value * 0.1f;
912         global_audio_mixer->set_compressor_threshold_dbfs(bus_index, threshold_dbfs);
913
914         QString label(QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
915         if (bus_index == 0) {
916                 ui->compressor_threshold_db_display->setText(label);
917         }
918         if (bus_index < audio_expanded_views.size()) {
919                 audio_expanded_views[bus_index]->compressor_threshold_db_display->setText(label);
920         }
921 }
922
923 void MainWindow::mini_fader_changed(int bus, double volume_db)
924 {
925         QString label(QString::fromStdString(format_db(volume_db, DB_WITH_SIGN)));
926         audio_miniviews[bus]->fader_label->setText(label);
927         audio_expanded_views[bus]->fader_label->setText(label);
928
929         global_audio_mixer->set_fader_volume(bus, volume_db);
930 }
931
932 void MainWindow::mute_button_toggled(int bus, bool checked)
933 {
934         global_audio_mixer->set_mute(bus, checked);
935         midi_mapper.refresh_lights();
936 }
937
938 void MainWindow::reset_meters_button_clicked()
939 {
940         global_audio_mixer->reset_meters();
941         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
942         ui->peak_display->setStyleSheet("");
943 }
944
945 void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<AudioMixer::BusLevel> bus_levels,
946                                       float global_level_lufs,
947                                       float range_low_lufs, float range_high_lufs,
948                                       float final_makeup_gain_db,
949                                       float correlation)
950 {
951         steady_clock::time_point now = steady_clock::now();
952
953         // The meters are somewhat inefficient to update. Only update them
954         // every 100 ms or so (we get updates every 5–20 ms). Note that this
955         // means that the digital peak meters are ever so slightly too low
956         // (each update won't be a faithful representation of the highest peak
957         // since the previous update, since there are frames we won't draw),
958         // but the _peak_ of the peak meters will be correct (it's tracked in
959         // AudioMixer, not here), and that's much more important.
960         double last_update_age = duration<double>(now - last_audio_level_callback).count();
961         if (last_update_age < 0.100) {
962                 return;
963         }
964         last_audio_level_callback = now;
965
966         post_to_main_thread([=]() {
967                 ui->vu_meter->set_level(level_lufs);
968                 for (unsigned bus_index = 0; bus_index < bus_levels.size(); ++bus_index) {
969                         if (bus_index < audio_miniviews.size()) {
970                                 const AudioMixer::BusLevel &level = bus_levels[bus_index];
971                                 Ui::AudioMiniView *miniview = audio_miniviews[bus_index];
972                                 miniview->peak_meter->set_level(
973                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
974                                 miniview->peak_meter->set_peak(
975                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
976                                 set_peak_label(miniview->peak_display_label, level.historic_peak_dbfs);
977
978                                 Ui::AudioExpandedView *view = audio_expanded_views[bus_index];
979                                 view->peak_meter->set_level(
980                                         level.current_level_dbfs[0], level.current_level_dbfs[1]);
981                                 view->peak_meter->set_peak(
982                                         level.peak_level_dbfs[0], level.peak_level_dbfs[1]);
983                                 view->reduction_meter->set_reduction_db(level.compressor_attenuation_db);
984                                 view->gainstaging_knob->blockSignals(true);
985                                 view->gainstaging_knob->setValue(lrintf(level.gain_staging_db * 10.0f));
986                                 view->gainstaging_knob->blockSignals(false);
987                                 view->gainstaging_db_display->setText(
988                                         QString("Gain: ") +
989                                         QString::fromStdString(format_db(level.gain_staging_db, DB_WITH_SIGN)));
990                                 set_peak_label(view->peak_display_label, level.historic_peak_dbfs);
991
992                                 midi_mapper.set_has_peaked(bus_index, level.historic_peak_dbfs >= -0.1f);
993                         }
994                 }
995                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
996                 ui->correlation_meter->set_correlation(correlation);
997
998                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
999                 set_peak_label(ui->peak_display, peak_db);
1000
1001                 // NOTE: Will be invisible when using multitrack audio.
1002                 if (!bus_levels.empty()) {
1003                         ui->gainstaging_knob->blockSignals(true);
1004                         ui->gainstaging_knob->setValue(lrintf(bus_levels[0].gain_staging_db * 10.0f));
1005                         ui->gainstaging_knob->blockSignals(false);
1006                         ui->gainstaging_db_display->setText(
1007                                 QString::fromStdString(format_db(bus_levels[0].gain_staging_db, DB_WITH_SIGN)));
1008                 }
1009
1010                 ui->makeup_gain_knob->blockSignals(true);
1011                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
1012                 ui->makeup_gain_knob->blockSignals(false);
1013                 ui->makeup_gain_db_display->setText(
1014                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
1015                 ui->makeup_gain_db_display_2->setText(
1016                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
1017
1018                 // Peak labels could have changed.
1019                 midi_mapper.refresh_lights();
1020         });
1021 }
1022
1023 void MainWindow::relayout()
1024 {
1025         int height = ui->vertical_layout->geometry().height();
1026         if (height <= 0) {
1027                 // Seemingly this can happen and must be ignored.
1028                 return;
1029         }
1030
1031         double remaining_height = height;
1032
1033         // Allocate the height; the most important part is to keep the main displays
1034         // at the right aspect if at all possible.
1035         double me_width = ui->me_preview->width();
1036         double me_height = me_width * double(global_flags.height) / double(global_flags.width) + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
1037
1038         // TODO: Scale the widths when we need to do this.
1039         if (me_height / double(height) > 0.8) {
1040                 me_height = height * 0.8;
1041         }
1042         remaining_height -= me_height + ui->vertical_layout->spacing();
1043
1044         // Space between the M/E displays and the audio strip.
1045         remaining_height -= ui->vertical_layout->spacing();
1046
1047         // The label above the audio strip.
1048         double compact_label_height = ui->compact_label->minimumHeight() +
1049                 ui->compact_audio_layout->spacing();
1050         remaining_height -= compact_label_height;
1051
1052         // The previews will be constrained by the remaining height, and the width.
1053         double preview_label_height = previews[0]->label->minimumSize().height() +
1054                 previews[0]->main_vertical_layout->spacing();
1055         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
1056         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * double(global_flags.height) / double(global_flags.width));
1057         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
1058
1059         ui->vertical_layout->setStretch(0, lrintf(me_height));
1060         ui->vertical_layout->setStretch(1,
1061                 lrintf(compact_label_height) +
1062                 lrintf(remaining_height) +
1063                 lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
1064
1065         ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
1066         ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
1067         ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
1068
1069         if (current_audio_view == 0) {  // Compact audio view.
1070                 // Set the widths for the previews.
1071                 double preview_width = preview_height * double(global_flags.width) / double(global_flags.height);
1072                 for (unsigned i = 0; i < previews.size(); ++i) {
1073                         ui->preview_displays->setStretch(i, lrintf(preview_width));
1074                 }
1075
1076                 // The preview horizontal spacer.
1077                 double remaining_preview_width = preview_total_width - previews.size() * preview_width;
1078                 ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
1079         } else if (current_audio_view == 2) {  // Video grid view.
1080                 // QGridLayout doesn't do it for us, since we need to be able to remove rows
1081                 // or columns as the grid changes, and it won't do that. Thus, position everything
1082                 // by hand.
1083                 constexpr int spacing = 6;
1084                 int grid_width = ui->preview_displays_grid->geometry().width();
1085                 int grid_height = ui->preview_displays_grid->geometry().height();
1086                 int best_preview_width = 0;
1087                 unsigned best_num_rows = 1, best_num_cols = 1;
1088                 for (unsigned num_rows = 1; num_rows <= previews.size(); ++num_rows) {
1089                         int num_cols = (previews.size() + num_rows - 1) / num_rows;
1090
1091                         int max_preview_height = (grid_height - spacing * (num_rows - 1)) / num_rows - preview_label_height;
1092                         int max_preview_width = (grid_width - spacing * (num_cols - 1)) / num_cols;
1093                         int preview_width = std::min<int>(max_preview_width, max_preview_height * double(global_flags.width) / double(global_flags.height));
1094
1095                         if (preview_width > best_preview_width) {
1096                                 best_preview_width = preview_width;
1097                                 best_num_rows = num_rows;
1098                                 best_num_cols = num_cols;
1099                         }
1100                 }
1101
1102                 double cell_height = lrintf(best_preview_width * double(global_flags.height) / double(global_flags.width)) + preview_label_height;
1103                 remaining_height = grid_height - best_num_rows * cell_height - (best_num_rows - 1) * spacing;
1104                 int cell_width = best_preview_width;
1105                 int remaining_width = grid_width - best_num_cols * cell_width - (best_num_cols - 1) * spacing;
1106
1107                 for (unsigned i = 0; i < previews.size(); ++i) {
1108                         int col_idx = i % best_num_cols;
1109                         int row_idx = i / best_num_cols;
1110
1111                         double top = remaining_height * 0.5f + row_idx * (cell_height + spacing);
1112                         double bottom = top + cell_height;
1113                         double left = remaining_width * 0.5f + col_idx * (cell_width + spacing);
1114                         double right = left + cell_width;
1115
1116                         QRect rect;
1117                         rect.setTop(lrintf(top));
1118                         rect.setBottom(lrintf(bottom));
1119                         rect.setLeft(lrintf(left));
1120                         rect.setRight(lrintf(right));
1121
1122                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1123                         display->setGeometry(rect);
1124                         display->show();
1125                 }
1126         }
1127 }
1128
1129 void MainWindow::set_locut(float value)
1130 {
1131         set_relative_value(ui->locut_cutoff_knob, value);
1132 }
1133
1134 void MainWindow::set_limiter_threshold(float value)
1135 {
1136         set_relative_value(ui->limiter_threshold_knob, value);
1137 }
1138
1139 void MainWindow::set_makeup_gain(float value)
1140 {
1141         set_relative_value(ui->makeup_gain_knob, value);
1142 }
1143
1144 void MainWindow::set_stereo_width(unsigned bus_idx, float value)
1145 {
1146         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::stereo_width_knob, value);
1147 }
1148
1149 void MainWindow::set_treble(unsigned bus_idx, float value)
1150 {
1151         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, value);
1152 }
1153
1154 void MainWindow::set_mid(unsigned bus_idx, float value)
1155 {
1156         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, value);
1157 }
1158
1159 void MainWindow::set_bass(unsigned bus_idx, float value)
1160 {
1161         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, value);
1162 }
1163
1164 void MainWindow::set_gain(unsigned bus_idx, float value)
1165 {
1166         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, value);
1167 }
1168
1169 void MainWindow::set_compressor_threshold(unsigned bus_idx, float value)
1170 {
1171         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, value);
1172 }
1173
1174 void MainWindow::set_fader(unsigned bus_idx, float value)
1175 {
1176         set_relative_value_if_exists(bus_idx, &Ui::AudioExpandedView::fader, value);
1177 }
1178
1179 void MainWindow::toggle_mute(unsigned bus_idx)
1180 {
1181         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button);
1182 }
1183
1184 void MainWindow::toggle_locut(unsigned bus_idx)
1185 {
1186         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled);
1187 }
1188
1189 void MainWindow::toggle_auto_gain_staging(unsigned bus_idx)
1190 {
1191         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox);
1192 }
1193
1194 void MainWindow::toggle_compressor(unsigned bus_idx)
1195 {
1196         click_button_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled);
1197 }
1198
1199 void MainWindow::clear_peak(unsigned bus_idx)
1200 {
1201         post_to_main_thread([=]{
1202                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1203                         global_audio_mixer->reset_peak(bus_idx);
1204                         midi_mapper.set_has_peaked(bus_idx, false);
1205                         midi_mapper.refresh_lights();
1206                 }
1207         });
1208 }
1209
1210 void MainWindow::clear_all_highlights()
1211 {
1212         post_to_main_thread([this]{
1213                 highlight_locut(false);
1214                 highlight_limiter_threshold(false);
1215                 highlight_makeup_gain(false);
1216                 highlight_toggle_limiter(false);
1217                 highlight_toggle_auto_makeup_gain(false);
1218                 for (unsigned bus_idx = 0; bus_idx < audio_expanded_views.size(); ++bus_idx) {
1219                         highlight_treble(bus_idx, false);
1220                         highlight_mid(bus_idx, false);
1221                         highlight_bass(bus_idx, false);
1222                         highlight_gain(bus_idx, false);
1223                         highlight_compressor_threshold(bus_idx, false);
1224                         highlight_fader(bus_idx, false);
1225                         highlight_mute(bus_idx, false);
1226                         highlight_toggle_locut(bus_idx, false);
1227                         highlight_toggle_auto_gain_staging(bus_idx, false);
1228                         highlight_toggle_compressor(bus_idx, false);
1229                 }
1230         });
1231 }
1232
1233 void MainWindow::toggle_limiter()
1234 {
1235         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1236                 ui->limiter_enabled->click();
1237         }
1238 }
1239
1240 void MainWindow::toggle_auto_makeup_gain()
1241 {
1242         if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL) {
1243                 ui->makeup_gain_auto_checkbox->click();
1244         }
1245 }
1246
1247 void MainWindow::highlight_locut(bool highlight)
1248 {
1249         post_to_main_thread([this, highlight]{
1250                 highlight_control(ui->locut_cutoff_knob, highlight);
1251                 highlight_control(ui->locut_cutoff_knob_2, highlight);
1252         });
1253 }
1254
1255 void MainWindow::highlight_limiter_threshold(bool highlight)
1256 {
1257         post_to_main_thread([this, highlight]{
1258                 highlight_control(ui->limiter_threshold_knob, highlight);
1259                 highlight_control(ui->limiter_threshold_knob_2, highlight);
1260         });
1261 }
1262
1263 void MainWindow::highlight_makeup_gain(bool highlight)
1264 {
1265         post_to_main_thread([this, highlight]{
1266                 highlight_control(ui->makeup_gain_knob, highlight);
1267                 highlight_control(ui->makeup_gain_knob_2, highlight);
1268         });
1269 }
1270
1271 void MainWindow::highlight_stereo_width(unsigned bus_idx, bool highlight)
1272 {
1273         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::stereo_width_knob, highlight);
1274 }
1275
1276 void MainWindow::highlight_treble(unsigned bus_idx, bool highlight)
1277 {
1278         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::treble_knob, highlight);
1279 }
1280
1281 void MainWindow::highlight_mid(unsigned bus_idx, bool highlight)
1282 {
1283         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mid_knob, highlight);
1284 }
1285
1286 void MainWindow::highlight_bass(unsigned bus_idx, bool highlight)
1287 {
1288         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::bass_knob, highlight);
1289 }
1290
1291 void MainWindow::highlight_gain(unsigned bus_idx, bool highlight)
1292 {
1293         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_knob, highlight);
1294 }
1295
1296 void MainWindow::highlight_compressor_threshold(unsigned bus_idx, bool highlight)
1297 {
1298         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_threshold_knob, highlight);
1299 }
1300
1301 void MainWindow::highlight_fader(unsigned bus_idx, bool highlight)
1302 {
1303         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::fader, highlight);
1304 }
1305
1306 void MainWindow::highlight_mute(unsigned bus_idx, bool highlight)
1307 {
1308         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::mute_button, highlight, /*is_mute_btton=*/true);
1309 }
1310
1311 void MainWindow::highlight_toggle_locut(unsigned bus_idx, bool highlight)
1312 {
1313         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::locut_enabled, highlight);
1314 }
1315
1316 void MainWindow::highlight_toggle_auto_gain_staging(unsigned bus_idx, bool highlight)
1317 {
1318         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::gainstaging_auto_checkbox, highlight);
1319 }
1320
1321 void MainWindow::highlight_toggle_compressor(unsigned bus_idx, bool highlight)
1322 {
1323         highlight_control_if_exists(bus_idx, &Ui::AudioExpandedView::compressor_enabled, highlight);
1324 }
1325
1326 void MainWindow::highlight_toggle_limiter(bool highlight)
1327 {
1328         post_to_main_thread([this, highlight]{
1329                 highlight_control(ui->limiter_enabled, highlight);
1330                 highlight_control(ui->limiter_enabled_2, highlight);
1331         });
1332 }
1333
1334 void MainWindow::highlight_toggle_auto_makeup_gain(bool highlight)
1335 {
1336         post_to_main_thread([this, highlight]{
1337                 highlight_control(ui->makeup_gain_auto_checkbox, highlight);
1338                 highlight_control(ui->makeup_gain_auto_checkbox_2, highlight);
1339         });
1340 }
1341
1342 template<class T>
1343 void MainWindow::set_relative_value(T *control, float value)
1344 {
1345         post_to_main_thread([control, value]{
1346                 control->setValue(lrintf(control->minimum() + value * (control->maximum() - control->minimum())));
1347         });
1348 }
1349
1350 template<class T>
1351 void MainWindow::set_relative_value_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), float value)
1352 {
1353         if (global_audio_mixer != nullptr &&
1354             global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1355             bus_idx < audio_expanded_views.size()) {
1356                 set_relative_value(audio_expanded_views[bus_idx]->*control, value);
1357         }
1358 }
1359
1360 template<class T>
1361 void MainWindow::click_button_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control))
1362 {
1363         post_to_main_thread([this, bus_idx, control]{
1364                 if (global_audio_mixer != nullptr &&
1365                     global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::MULTICHANNEL &&
1366                     bus_idx < audio_expanded_views.size()) {
1367                         (audio_expanded_views[bus_idx]->*control)->click();
1368                 }
1369         });
1370 }
1371
1372 template<class T>
1373 void MainWindow::highlight_control(T *control, bool highlight)
1374 {
1375         if (control == nullptr) {
1376                 return;
1377         }
1378         if (global_audio_mixer == nullptr ||
1379             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1380                 highlight = false;
1381         }
1382         if (highlight) {
1383                 control->setStyleSheet("background: rgb(0,255,0,80)");
1384         } else {
1385                 control->setStyleSheet("");
1386         }
1387 }
1388
1389 template<class T>
1390 void MainWindow::highlight_mute_control(T *control, bool highlight)
1391 {
1392         if (control == nullptr) {
1393                 return;
1394         }
1395         if (global_audio_mixer == nullptr ||
1396             global_audio_mixer->get_mapping_mode() != AudioMixer::MappingMode::MULTICHANNEL) {
1397                 highlight = false;
1398         }
1399         if (highlight) {
1400                 control->setStyleSheet("QPushButton { background: rgb(0,255,0,80); } QPushButton:checked { background: rgba(255,80,0,140); }");
1401         } else {
1402                 control->setStyleSheet("QPushButton:checked { background: rgba(255,0,0,80); }");
1403         }
1404 }
1405
1406 template<class T>
1407 void MainWindow::highlight_control_if_exists(unsigned bus_idx, T *(Ui_AudioExpandedView::*control), bool highlight, bool is_mute_button)
1408 {
1409         post_to_main_thread([this, bus_idx, control, highlight, is_mute_button]{
1410                 if (bus_idx < audio_expanded_views.size()) {
1411                         if (is_mute_button) {
1412                                 highlight_mute_control(audio_expanded_views[bus_idx]->*control, highlight);
1413                         } else {
1414                                 highlight_control(audio_expanded_views[bus_idx]->*control, highlight);
1415                         }
1416                 }
1417         });
1418 }
1419
1420 void MainWindow::set_transition_names(vector<string> transition_names)
1421 {
1422         if (transition_names.size() < 1 || transition_names[0].empty()) {
1423                 transition_btn1->setText(QString(""));
1424         } else {
1425                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
1426                 ui->transition_btn1->setShortcut(QKeySequence("J"));
1427         }
1428         if (transition_names.size() < 2 || transition_names[1].empty()) {
1429                 transition_btn2->setText(QString(""));
1430         } else {
1431                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
1432                 ui->transition_btn2->setShortcut(QKeySequence("K"));
1433         }
1434         if (transition_names.size() < 3 || transition_names[2].empty()) {
1435                 transition_btn3->setText(QString(""));
1436         } else {
1437                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
1438                 ui->transition_btn3->setShortcut(QKeySequence("L"));
1439         }
1440 }
1441
1442 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
1443 {
1444         if (output >= Mixer::OUTPUT_INPUT0) {
1445                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1446                 previews[channel]->label->setText(name.c_str());
1447         }
1448
1449         analyzer->update_channel_name(output, name);
1450 }
1451
1452 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
1453 {
1454         if (output >= Mixer::OUTPUT_INPUT0) {
1455                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
1456                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
1457         }
1458 }
1459
1460 void MainWindow::transition_clicked(int transition_number)
1461 {
1462         global_mixer->transition_clicked(transition_number);
1463 }
1464
1465 void MainWindow::channel_clicked(int channel_number)
1466 {
1467         if (current_wb_pick_display == channel_number) {
1468                 // The picking was already done from eventFilter(), since we don't get
1469                 // the mouse pointer here.
1470         } else {
1471                 global_mixer->channel_clicked(channel_number);
1472         }
1473 }
1474
1475 void MainWindow::quick_cut_activated(int channel_number)
1476 {
1477         if (!global_flags.enable_quick_cut_keys) {
1478                 return;
1479         }
1480         global_mixer->channel_clicked(channel_number);
1481         global_mixer->transition_clicked(0);
1482 }
1483
1484 void MainWindow::wb_button_clicked(int channel_number)
1485 {
1486         current_wb_pick_display = channel_number;
1487         QApplication::setOverrideCursor(Qt::CrossCursor);
1488 }
1489
1490 void MainWindow::audio_view_changed(int audio_view)
1491 {
1492         if (audio_view == current_audio_view) {
1493                 return;
1494         }
1495
1496         if (audio_view == 0) {
1497                 // Compact audio view. (1, full audio view, has no video previews.)
1498                 for (unsigned i = 0; i < previews.size(); ++i) {
1499                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1500                         ui->preview_displays->insertWidget(i, display, 1);
1501                 }
1502         } else if (audio_view == 2) {
1503                 // Video grid display.
1504                 for (unsigned i = 0; i < previews.size(); ++i) {
1505                         QWidget *display = static_cast<QWidget *>(previews[i]->frame->parent());
1506                         display->setParent(ui->preview_displays_grid);
1507                         display->show();
1508                 }
1509         }
1510
1511         current_audio_view = audio_view;
1512
1513         // Ask for a relayout, but only after the event loop is done doing relayout
1514         // on everything else.
1515         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
1516 }
1517
1518 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
1519 {
1520         if (current_wb_pick_display != -1 &&
1521             event->type() == QEvent::MouseButtonRelease &&
1522             watched->isWidgetType()) {
1523                 QApplication::restoreOverrideCursor();
1524                 if (watched == previews[current_wb_pick_display]->display) {
1525                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
1526                         previews[current_wb_pick_display]->display->grab_white_balance(
1527                                 current_wb_pick_display,
1528                                 mouse_event->x(), mouse_event->y());
1529                 } else {
1530                         // The user clicked on something else, give up.
1531                         // (The click goes through, which might not be ideal, but, yes.)
1532                         current_wb_pick_display = -1;
1533                 }
1534         }
1535         return false;
1536 }
1537
1538 void MainWindow::closeEvent(QCloseEvent *event)
1539 {
1540         if (global_mixer->get_num_connected_clients() > 0) {
1541                 QMessageBox::StandardButton reply =
1542                         QMessageBox::question(this, "Nageru", "There are clients connected. Do you really want to quit?",
1543                                 QMessageBox::Yes | QMessageBox::No);
1544                 if (reply != QMessageBox::Yes) {
1545                         event->ignore();
1546                         return;
1547                 }
1548         }
1549
1550         analyzer->hide();
1551         global_mixer->quit();
1552         mixer_shutting_down();
1553         event->accept();
1554 }
1555
1556 void MainWindow::audio_state_changed()
1557 {
1558         post_to_main_thread([this]{
1559                 if (global_audio_mixer->get_mapping_mode() == AudioMixer::MappingMode::SIMPLE) {
1560                         return;
1561                 }
1562                 InputMapping mapping = global_audio_mixer->get_input_mapping();
1563                 for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
1564                         string label = get_bus_desc_label(mapping.buses[bus_index]);
1565                         audio_miniviews[bus_index]->bus_desc_label->setFullText(
1566                                 QString::fromStdString(label));
1567                         audio_expanded_views[bus_index]->bus_desc_label->setFullText(
1568                                 QString::fromStdString(label));
1569                 }
1570         });
1571 }