1 #include "mainwindow.h"
10 #include <QInputDialog>
11 #include <QKeySequence>
14 #include <QPushButton>
15 #include <QResizeEvent>
20 #include "aboutdialog.h"
25 #include "post_to_main_thread.h"
26 #include "ui_display.h"
27 #include "ui_mainwindow.h"
33 using namespace std::placeholders;
35 Q_DECLARE_METATYPE(std::string);
36 Q_DECLARE_METATYPE(std::vector<std::string>);
38 MainWindow *global_mainwindow = nullptr;
42 void schedule_cut_signal(int ignored)
44 global_mixer->schedule_cut();
47 void quit_signal(int ignored)
49 global_mainwindow->close();
52 constexpr unsigned DB_NO_FLAGS = 0x0;
53 constexpr unsigned DB_WITH_SIGN = 0x1;
54 constexpr unsigned DB_BARE = 0x2;
56 string format_db(double db, unsigned flags)
59 if (flags & DB_WITH_SIGN) {
62 snprintf(buf, sizeof(buf), "%+.1f", db);
64 } else if (db < 0.0) {
67 // Should never happen, really.
73 snprintf(buf, sizeof(buf), "%.1f", db);
75 } else if (db < 0.0) {
78 // Should never happen, really.
82 if (!(flags & DB_BARE)) {
90 MainWindow::MainWindow()
91 : ui(new Ui::MainWindow)
93 global_mainwindow = this;
96 ui->me_live->set_output(Mixer::OUTPUT_LIVE);
97 ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
100 connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
101 connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
102 connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
104 if (global_flags.x264_video_to_http) {
105 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
107 ui->x264_bitrate_action->setEnabled(false);
110 // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
111 // TODO: Make them dynamic.
112 connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
113 connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
114 connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
117 transition_btn1 = ui->transition_btn1;
118 transition_btn2 = ui->transition_btn2;
119 transition_btn3 = ui->transition_btn3;
120 qRegisterMetaType<string>("std::string");
121 qRegisterMetaType<vector<string>>("std::vector<std::string>");
122 connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
123 qRegisterMetaType<Mixer::Output>("Mixer::Output");
126 void MainWindow::resizeEvent(QResizeEvent* event)
128 QMainWindow::resizeEvent(event);
130 // Ask for a relayout, but only after the event loop is done doing relayout
131 // on everything else.
132 QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
135 void MainWindow::mixer_created(Mixer *mixer)
137 // Make the previews.
138 unsigned num_previews = mixer->get_num_channels();
140 for (unsigned i = 0; i < num_previews; ++i) {
141 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
143 QWidget *preview = new QWidget(this);
144 Ui::Display *ui_display = new Ui::Display;
145 ui_display->setupUi(preview);
146 ui_display->label->setText(mixer->get_channel_name(output).c_str());
147 ui_display->display->set_output(output);
148 ui->preview_displays->insertWidget(previews.size(), preview, 1);
149 previews.push_back(ui_display);
151 // Hook up the click.
152 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
154 // Let the theme update the text whenever the resolution or color changed.
155 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
156 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
158 // Hook up the keyboard key.
159 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
160 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
162 // Hook up the white balance button (irrelevant if invisible).
163 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
164 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
167 // TODO: Fetch all of the values these for completeness,
168 // not just the enable knobs implied by flags.
169 ui->locut_enabled->setChecked(global_mixer->get_locut_enabled());
170 ui->gainstaging_knob->setValue(global_mixer->get_gain_staging_db());
171 ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_gain_staging_auto());
172 ui->compressor_enabled->setChecked(global_mixer->get_compressor_enabled());
173 ui->limiter_enabled->setChecked(global_mixer->get_limiter_enabled());
174 ui->makeup_gain_auto_checkbox->setChecked(global_mixer->get_final_makeup_gain_auto());
176 ui->limiter_threshold_db_display->setText(
177 QString::fromStdString(format_db(mixer->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
178 ui->compressor_threshold_db_display->setText(
179 QString::fromStdString(format_db(mixer->get_compressor_threshold_dbfs(), DB_WITH_SIGN)));
181 connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
182 cutoff_knob_changed(ui->locut_cutoff_knob->value());
183 connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
184 global_mixer->set_locut_enabled(state == Qt::Checked);
187 connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
188 connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
189 global_mixer->set_gain_staging_auto(state == Qt::Checked);
191 connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
192 connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
193 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
196 connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
197 connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
198 connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
199 global_mixer->set_limiter_enabled(state == Qt::Checked);
201 connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
202 global_mixer->set_compressor_enabled(state == Qt::Checked);
204 connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
205 mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
207 struct sigaction act;
208 memset(&act, 0, sizeof(act));
209 act.sa_handler = schedule_cut_signal;
210 act.sa_flags = SA_RESTART;
211 sigaction(SIGHUP, &act, nullptr);
213 // Mostly for debugging. Don't override SIGINT, that's so evil if
214 // shutdown isn't instant.
215 memset(&act, 0, sizeof(act));
216 act.sa_handler = quit_signal;
217 act.sa_flags = SA_RESTART;
218 sigaction(SIGUSR1, &act, nullptr);
221 void MainWindow::mixer_shutting_down()
223 ui->me_live->clean_context();
224 ui->me_preview->clean_context();
225 for (Ui::Display *display : previews) {
226 display->display->clean_context();
230 void MainWindow::cut_triggered()
232 global_mixer->schedule_cut();
235 void MainWindow::x264_bitrate_triggered()
238 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);
239 if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
240 global_flags.x264_bitrate = new_bitrate;
241 global_mixer->change_x264_bitrate(new_bitrate);
245 void MainWindow::exit_triggered()
250 void MainWindow::about_triggered()
252 AboutDialog().exec();
255 void MainWindow::gain_staging_knob_changed(int value)
257 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
259 float gain_db = value * 0.1f;
260 global_mixer->set_gain_staging_db(gain_db);
262 // The label will be updated by the audio level callback.
265 void MainWindow::final_makeup_gain_knob_changed(int value)
267 ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
269 float gain_db = value * 0.1f;
270 global_mixer->set_final_makeup_gain_db(gain_db);
272 // The label will be updated by the audio level callback.
275 void MainWindow::cutoff_knob_changed(int value)
277 float octaves = value * 0.1f;
278 float cutoff_hz = 20.0 * pow(2.0, octaves);
279 global_mixer->set_locut_cutoff(cutoff_hz);
282 snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
283 ui->locut_cutoff_display->setText(buf);
286 void MainWindow::limiter_threshold_knob_changed(int value)
288 float threshold_dbfs = value * 0.1f;
289 global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
290 ui->limiter_threshold_db_display->setText(
291 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
294 void MainWindow::compressor_threshold_knob_changed(int value)
296 float threshold_dbfs = value * 0.1f;
297 global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
298 ui->compressor_threshold_db_display->setText(
299 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
302 void MainWindow::reset_meters_button_clicked()
304 global_mixer->reset_meters();
305 ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
306 ui->peak_display->setStyleSheet("");
309 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
310 float range_low_lufs, float range_high_lufs,
311 float gain_staging_db, float final_makeup_gain_db,
315 clock_gettime(CLOCK_MONOTONIC, &now);
317 // The meters are somewhat inefficient to update. Only update them
318 // every 100 ms or so (we get updates every 5–20 ms).
319 double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
320 1e-9 * (now.tv_nsec - last_audio_level_callback.tv_nsec);
321 if (last_update_age < 0.100) {
324 last_audio_level_callback = now;
326 post_to_main_thread([=]() {
327 ui->vu_meter->set_level(level_lufs);
328 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
329 ui->correlation_meter->set_correlation(correlation);
331 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
332 if (peak_db > -0.1f) { // -0.1 dBFS is EBU peak limit.
333 ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
335 ui->peak_display->setStyleSheet("");
338 ui->gainstaging_knob->blockSignals(true);
339 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
340 ui->gainstaging_knob->blockSignals(false);
341 ui->gainstaging_db_display->setText(
342 QString::fromStdString(format_db(gain_staging_db, DB_WITH_SIGN)));
344 ui->makeup_gain_knob->blockSignals(true);
345 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
346 ui->makeup_gain_knob->blockSignals(false);
347 ui->makeup_gain_db_display->setText(
348 QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
352 void MainWindow::relayout()
354 int height = ui->vertical_layout->geometry().height();
356 double remaining_height = height;
358 // Allocate the height; the most important part is to keep the main displays
359 // at 16:9 if at all possible.
360 double me_width = ui->me_preview->width();
361 double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
363 // TODO: Scale the widths when we need to do this.
364 if (me_height / double(height) > 0.8) {
365 me_height = height * 0.8;
367 remaining_height -= me_height + ui->vertical_layout->spacing();
369 double audiostrip_height = ui->audiostrip->geometry().height();
370 remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
372 // The previews will be constrained by the remaining height, and the width.
373 double preview_label_height = previews[0]->title_bar->geometry().height() +
374 previews[0]->main_vertical_layout->spacing();
375 int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
376 double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
377 remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
379 ui->vertical_layout->setStretch(0, lrintf(me_height));
380 ui->vertical_layout->setStretch(1, 0); // Don't stretch the audiostrip.
381 ui->vertical_layout->setStretch(2, max<int>(1, remaining_height)); // Spacer.
382 ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
384 // Set the widths for the previews.
385 double preview_width = preview_height * 16.0 / 9.0;
386 for (unsigned i = 0; i < previews.size(); ++i) {
387 ui->preview_displays->setStretch(i, lrintf(preview_width));
390 // The preview horizontal spacer.
391 double remaining_preview_width = preview_total_width - previews.size() * preview_width;
392 ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
395 void MainWindow::set_transition_names(vector<string> transition_names)
397 if (transition_names.size() < 1 || transition_names[0].empty()) {
398 transition_btn1->setText(QString(""));
400 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
401 ui->transition_btn1->setShortcut(QKeySequence("J"));
403 if (transition_names.size() < 2 || transition_names[1].empty()) {
404 transition_btn2->setText(QString(""));
406 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
407 ui->transition_btn2->setShortcut(QKeySequence("K"));
409 if (transition_names.size() < 3 || transition_names[2].empty()) {
410 transition_btn3->setText(QString(""));
412 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
413 ui->transition_btn3->setShortcut(QKeySequence("L"));
417 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
419 if (output >= Mixer::OUTPUT_INPUT0) {
420 unsigned channel = output - Mixer::OUTPUT_INPUT0;
421 previews[channel]->label->setText(name.c_str());
425 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
427 if (output >= Mixer::OUTPUT_INPUT0) {
428 unsigned channel = output - Mixer::OUTPUT_INPUT0;
429 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
433 void MainWindow::transition_clicked(int transition_number)
435 global_mixer->transition_clicked(transition_number);
438 void MainWindow::channel_clicked(int channel_number)
440 if (current_wb_pick_display == channel_number) {
441 // The picking was already done from eventFilter(), since we don't get
442 // the mouse pointer here.
444 global_mixer->channel_clicked(channel_number);
448 void MainWindow::wb_button_clicked(int channel_number)
450 current_wb_pick_display = channel_number;
451 QApplication::setOverrideCursor(Qt::CrossCursor);
454 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
456 if (current_wb_pick_display != -1 &&
457 event->type() == QEvent::MouseButtonRelease &&
458 watched->isWidgetType()) {
459 QApplication::restoreOverrideCursor();
460 if (watched == previews[current_wb_pick_display]->display) {
461 const QMouseEvent *mouse_event = (QMouseEvent *)event;
462 set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
464 // The user clicked on something else, give up.
465 // (The click goes through, which might not be ideal, but, yes.)
466 current_wb_pick_display = -1;
474 double srgb_to_linear(double x)
479 return pow((x + 0.055) / 1.055, 2.4);
485 void MainWindow::set_white_balance(int channel_number, int x, int y)
487 // Set the white balance to neutral for the grab. It's probably going to
488 // flicker a bit, but hopefully this display is not live anyway.
489 global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
490 previews[channel_number]->display->updateGL();
491 QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
493 double r = srgb_to_linear(qRed(reference_color) / 255.0);
494 double g = srgb_to_linear(qGreen(reference_color) / 255.0);
495 double b = srgb_to_linear(qBlue(reference_color) / 255.0);
496 global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
497 previews[channel_number]->display->updateGL();