1 #include "mainwindow.h"
11 #include <QInputDialog>
12 #include <QKeySequence>
15 #include <QPushButton>
16 #include <QResizeEvent>
21 #include "aboutdialog.h"
26 #include "post_to_main_thread.h"
27 #include "ui_display.h"
28 #include "ui_mainwindow.h"
34 using namespace std::chrono;
35 using namespace std::placeholders;
37 Q_DECLARE_METATYPE(std::string);
38 Q_DECLARE_METATYPE(std::vector<std::string>);
40 MainWindow *global_mainwindow = nullptr;
44 void schedule_cut_signal(int ignored)
46 global_mixer->schedule_cut();
49 void quit_signal(int ignored)
51 global_mainwindow->close();
54 constexpr unsigned DB_NO_FLAGS = 0x0;
55 constexpr unsigned DB_WITH_SIGN = 0x1;
56 constexpr unsigned DB_BARE = 0x2;
58 string format_db(double db, unsigned flags)
61 if (flags & DB_WITH_SIGN) {
64 snprintf(buf, sizeof(buf), "%+.1f", db);
66 } else if (db < 0.0) {
69 // Should never happen, really.
75 snprintf(buf, sizeof(buf), "%.1f", db);
77 } else if (db < 0.0) {
80 // Should never happen, really.
84 if (!(flags & DB_BARE)) {
92 MainWindow::MainWindow()
93 : ui(new Ui::MainWindow)
95 global_mainwindow = this;
98 ui->me_live->set_output(Mixer::OUTPUT_LIVE);
99 ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
102 connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
103 connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
104 connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
106 if (global_flags.x264_video_to_http) {
107 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
109 ui->x264_bitrate_action->setEnabled(false);
112 // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
113 // TODO: Make them dynamic.
114 connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
115 connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
116 connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
119 transition_btn1 = ui->transition_btn1;
120 transition_btn2 = ui->transition_btn2;
121 transition_btn3 = ui->transition_btn3;
122 qRegisterMetaType<string>("std::string");
123 qRegisterMetaType<vector<string>>("std::vector<std::string>");
124 connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
125 qRegisterMetaType<Mixer::Output>("Mixer::Output");
127 last_audio_level_callback = steady_clock::now() - seconds(1);
130 void MainWindow::resizeEvent(QResizeEvent* event)
132 QMainWindow::resizeEvent(event);
134 // Ask for a relayout, but only after the event loop is done doing relayout
135 // on everything else.
136 QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
139 void MainWindow::mixer_created(Mixer *mixer)
141 // Make the previews.
142 unsigned num_previews = mixer->get_num_channels();
144 for (unsigned i = 0; i < num_previews; ++i) {
145 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
147 QWidget *preview = new QWidget(this);
148 Ui::Display *ui_display = new Ui::Display;
149 ui_display->setupUi(preview);
150 ui_display->label->setText(mixer->get_channel_name(output).c_str());
151 ui_display->display->set_output(output);
152 ui->preview_displays->insertWidget(previews.size(), preview, 1);
153 previews.push_back(ui_display);
155 // Hook up the click.
156 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
158 // Let the theme update the text whenever the resolution or color changed.
159 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
160 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
162 // Hook up the keyboard key.
163 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
164 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
166 // Hook up the white balance button (irrelevant if invisible).
167 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
168 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
171 // TODO: Fetch all of the values these for completeness,
172 // not just the enable knobs implied by flags.
173 ui->locut_enabled->setChecked(global_mixer->get_locut_enabled());
174 ui->gainstaging_knob->setValue(global_mixer->get_gain_staging_db());
175 ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_gain_staging_auto());
176 ui->compressor_enabled->setChecked(global_mixer->get_compressor_enabled());
177 ui->limiter_enabled->setChecked(global_mixer->get_limiter_enabled());
178 ui->makeup_gain_auto_checkbox->setChecked(global_mixer->get_final_makeup_gain_auto());
180 ui->limiter_threshold_db_display->setText(
181 QString::fromStdString(format_db(mixer->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
182 ui->compressor_threshold_db_display->setText(
183 QString::fromStdString(format_db(mixer->get_compressor_threshold_dbfs(), DB_WITH_SIGN)));
185 connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
186 cutoff_knob_changed(ui->locut_cutoff_knob->value());
187 connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
188 global_mixer->set_locut_enabled(state == Qt::Checked);
191 connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
192 connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
193 global_mixer->set_gain_staging_auto(state == Qt::Checked);
195 connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
196 connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
197 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
200 connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
201 connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
202 connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
203 global_mixer->set_limiter_enabled(state == Qt::Checked);
205 connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
206 global_mixer->set_compressor_enabled(state == Qt::Checked);
208 connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
209 mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
211 struct sigaction act;
212 memset(&act, 0, sizeof(act));
213 act.sa_handler = schedule_cut_signal;
214 act.sa_flags = SA_RESTART;
215 sigaction(SIGHUP, &act, nullptr);
217 // Mostly for debugging. Don't override SIGINT, that's so evil if
218 // shutdown isn't instant.
219 memset(&act, 0, sizeof(act));
220 act.sa_handler = quit_signal;
221 act.sa_flags = SA_RESTART;
222 sigaction(SIGUSR1, &act, nullptr);
225 void MainWindow::mixer_shutting_down()
227 ui->me_live->clean_context();
228 ui->me_preview->clean_context();
229 for (Ui::Display *display : previews) {
230 display->display->clean_context();
234 void MainWindow::cut_triggered()
236 global_mixer->schedule_cut();
239 void MainWindow::x264_bitrate_triggered()
242 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);
243 if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
244 global_flags.x264_bitrate = new_bitrate;
245 global_mixer->change_x264_bitrate(new_bitrate);
249 void MainWindow::exit_triggered()
254 void MainWindow::about_triggered()
256 AboutDialog().exec();
259 void MainWindow::gain_staging_knob_changed(int value)
261 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
263 float gain_db = value * 0.1f;
264 global_mixer->set_gain_staging_db(gain_db);
266 // The label will be updated by the audio level callback.
269 void MainWindow::final_makeup_gain_knob_changed(int value)
271 ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
273 float gain_db = value * 0.1f;
274 global_mixer->set_final_makeup_gain_db(gain_db);
276 // The label will be updated by the audio level callback.
279 void MainWindow::cutoff_knob_changed(int value)
281 float octaves = value * 0.1f;
282 float cutoff_hz = 20.0 * pow(2.0, octaves);
283 global_mixer->set_locut_cutoff(cutoff_hz);
286 snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
287 ui->locut_cutoff_display->setText(buf);
290 void MainWindow::limiter_threshold_knob_changed(int value)
292 float threshold_dbfs = value * 0.1f;
293 global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
294 ui->limiter_threshold_db_display->setText(
295 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
298 void MainWindow::compressor_threshold_knob_changed(int value)
300 float threshold_dbfs = value * 0.1f;
301 global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
302 ui->compressor_threshold_db_display->setText(
303 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
306 void MainWindow::reset_meters_button_clicked()
308 global_mixer->reset_meters();
309 ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
310 ui->peak_display->setStyleSheet("");
313 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
314 float range_low_lufs, float range_high_lufs,
315 float gain_staging_db, float final_makeup_gain_db,
318 steady_clock::time_point now = steady_clock::now();
320 // The meters are somewhat inefficient to update. Only update them
321 // every 100 ms or so (we get updates every 5–20 ms).
322 double last_update_age = duration<double>(now - last_audio_level_callback).count();
323 if (last_update_age < 0.100) {
326 last_audio_level_callback = now;
328 post_to_main_thread([=]() {
329 ui->vu_meter->set_level(level_lufs);
330 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
331 ui->correlation_meter->set_correlation(correlation);
333 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
334 if (peak_db > -0.1f) { // -0.1 dBFS is EBU peak limit.
335 ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
337 ui->peak_display->setStyleSheet("");
340 ui->gainstaging_knob->blockSignals(true);
341 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
342 ui->gainstaging_knob->blockSignals(false);
343 ui->gainstaging_db_display->setText(
344 QString::fromStdString(format_db(gain_staging_db, DB_WITH_SIGN)));
346 ui->makeup_gain_knob->blockSignals(true);
347 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
348 ui->makeup_gain_knob->blockSignals(false);
349 ui->makeup_gain_db_display->setText(
350 QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
354 void MainWindow::relayout()
356 int height = ui->vertical_layout->geometry().height();
358 double remaining_height = height;
360 // Allocate the height; the most important part is to keep the main displays
361 // at 16:9 if at all possible.
362 double me_width = ui->me_preview->width();
363 double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
365 // TODO: Scale the widths when we need to do this.
366 if (me_height / double(height) > 0.8) {
367 me_height = height * 0.8;
369 remaining_height -= me_height + ui->vertical_layout->spacing();
371 double audiostrip_height = ui->audiostrip->geometry().height();
372 remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
374 // The previews will be constrained by the remaining height, and the width.
375 double preview_label_height = previews[0]->title_bar->geometry().height() +
376 previews[0]->main_vertical_layout->spacing();
377 int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
378 double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
379 remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
381 ui->vertical_layout->setStretch(0, lrintf(me_height));
382 ui->vertical_layout->setStretch(1, 0); // Don't stretch the audiostrip.
383 ui->vertical_layout->setStretch(2, max<int>(1, remaining_height)); // Spacer.
384 ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
386 // Set the widths for the previews.
387 double preview_width = preview_height * 16.0 / 9.0;
388 for (unsigned i = 0; i < previews.size(); ++i) {
389 ui->preview_displays->setStretch(i, lrintf(preview_width));
392 // The preview horizontal spacer.
393 double remaining_preview_width = preview_total_width - previews.size() * preview_width;
394 ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
397 void MainWindow::set_transition_names(vector<string> transition_names)
399 if (transition_names.size() < 1 || transition_names[0].empty()) {
400 transition_btn1->setText(QString(""));
402 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
403 ui->transition_btn1->setShortcut(QKeySequence("J"));
405 if (transition_names.size() < 2 || transition_names[1].empty()) {
406 transition_btn2->setText(QString(""));
408 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
409 ui->transition_btn2->setShortcut(QKeySequence("K"));
411 if (transition_names.size() < 3 || transition_names[2].empty()) {
412 transition_btn3->setText(QString(""));
414 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
415 ui->transition_btn3->setShortcut(QKeySequence("L"));
419 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
421 if (output >= Mixer::OUTPUT_INPUT0) {
422 unsigned channel = output - Mixer::OUTPUT_INPUT0;
423 previews[channel]->label->setText(name.c_str());
427 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
429 if (output >= Mixer::OUTPUT_INPUT0) {
430 unsigned channel = output - Mixer::OUTPUT_INPUT0;
431 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
435 void MainWindow::transition_clicked(int transition_number)
437 global_mixer->transition_clicked(transition_number);
440 void MainWindow::channel_clicked(int channel_number)
442 if (current_wb_pick_display == channel_number) {
443 // The picking was already done from eventFilter(), since we don't get
444 // the mouse pointer here.
446 global_mixer->channel_clicked(channel_number);
450 void MainWindow::wb_button_clicked(int channel_number)
452 current_wb_pick_display = channel_number;
453 QApplication::setOverrideCursor(Qt::CrossCursor);
456 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
458 if (current_wb_pick_display != -1 &&
459 event->type() == QEvent::MouseButtonRelease &&
460 watched->isWidgetType()) {
461 QApplication::restoreOverrideCursor();
462 if (watched == previews[current_wb_pick_display]->display) {
463 const QMouseEvent *mouse_event = (QMouseEvent *)event;
464 set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
466 // The user clicked on something else, give up.
467 // (The click goes through, which might not be ideal, but, yes.)
468 current_wb_pick_display = -1;
476 double srgb_to_linear(double x)
481 return pow((x + 0.055) / 1.055, 2.4);
487 void MainWindow::set_white_balance(int channel_number, int x, int y)
489 // Set the white balance to neutral for the grab. It's probably going to
490 // flicker a bit, but hopefully this display is not live anyway.
491 global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
492 previews[channel_number]->display->updateGL();
493 QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
495 double r = srgb_to_linear(qRed(reference_color) / 255.0);
496 double g = srgb_to_linear(qGreen(reference_color) / 255.0);
497 double b = srgb_to_linear(qBlue(reference_color) / 255.0);
498 global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
499 previews[channel_number]->display->updateGL();