1 #include "mainwindow.h"
11 #include <QInputDialog>
12 #include <QKeySequence>
15 #include <QPushButton>
16 #include <QResizeEvent>
21 #include "aboutdialog.h"
22 #include "disk_space_estimator.h"
27 #include "post_to_main_thread.h"
28 #include "ui_audio_miniview.h"
29 #include "ui_display.h"
30 #include "ui_mainwindow.h"
36 using namespace std::chrono;
37 using namespace std::placeholders;
39 Q_DECLARE_METATYPE(std::string);
40 Q_DECLARE_METATYPE(std::vector<std::string>);
42 MainWindow *global_mainwindow = nullptr;
46 void schedule_cut_signal(int ignored)
48 global_mixer->schedule_cut();
51 void quit_signal(int ignored)
53 global_mainwindow->close();
56 constexpr unsigned DB_NO_FLAGS = 0x0;
57 constexpr unsigned DB_WITH_SIGN = 0x1;
58 constexpr unsigned DB_BARE = 0x2;
60 string format_db(double db, unsigned flags)
63 if (flags & DB_WITH_SIGN) {
66 snprintf(buf, sizeof(buf), "%+.1f", db);
68 } else if (db < 0.0) {
71 // Should never happen, really.
77 snprintf(buf, sizeof(buf), "%.1f", db);
79 } else if (db < 0.0) {
82 // Should never happen, really.
86 if (!(flags & DB_BARE)) {
94 MainWindow::MainWindow()
95 : ui(new Ui::MainWindow)
97 global_mainwindow = this;
100 global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
101 disk_free_label = new QLabel(this);
102 disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
103 ui->menuBar->setCornerWidget(disk_free_label);
105 ui->me_live->set_output(Mixer::OUTPUT_LIVE);
106 ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
109 connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
110 connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
111 connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
113 if (global_flags.x264_video_to_http) {
114 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
116 ui->x264_bitrate_action->setEnabled(false);
119 // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
120 // TODO: Make them dynamic.
121 connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
122 connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
123 connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
126 transition_btn1 = ui->transition_btn1;
127 transition_btn2 = ui->transition_btn2;
128 transition_btn3 = ui->transition_btn3;
129 qRegisterMetaType<string>("std::string");
130 qRegisterMetaType<vector<string>>("std::vector<std::string>");
131 connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
132 qRegisterMetaType<Mixer::Output>("Mixer::Output");
134 last_audio_level_callback = steady_clock::now() - seconds(1);
137 void MainWindow::resizeEvent(QResizeEvent* event)
139 QMainWindow::resizeEvent(event);
141 // Ask for a relayout, but only after the event loop is done doing relayout
142 // on everything else.
143 QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
146 void MainWindow::mixer_created(Mixer *mixer)
148 // Make the previews.
149 unsigned num_previews = mixer->get_num_channels();
151 for (unsigned i = 0; i < num_previews; ++i) {
152 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
154 QWidget *preview = new QWidget(this);
155 Ui::Display *ui_display = new Ui::Display;
156 ui_display->setupUi(preview);
157 ui_display->label->setText(mixer->get_channel_name(output).c_str());
158 ui_display->display->set_output(output);
159 ui->preview_displays->insertWidget(previews.size(), preview, 1);
160 previews.push_back(ui_display);
162 // Hook up the click.
163 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
165 // Let the theme update the text whenever the resolution or color changed.
166 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
167 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
169 // Hook up the keyboard key.
170 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
171 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
173 // Hook up the white balance button (irrelevant if invisible).
174 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
175 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
178 // Audio miniview: Make some channels!
179 for (unsigned i = 0; i < num_previews; ++i) {
180 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
182 QWidget *channel = new QWidget(this);
183 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
184 ui_audio_miniview->setupUi(channel);
185 ui_audio_miniview->channel_desc_label->setFullText(
186 QString::fromStdString(mixer->get_channel_name(output)));
187 ui->faders->addWidget(channel);
189 connect(ui_audio_miniview->fader, &QAbstractSlider::valueChanged,
190 bind(&MainWindow::mini_fader_changed, this, ui_audio_miniview, i, _1));
193 // TODO: Fetch all of the values these for completeness,
194 // not just the enable knobs implied by flags.
195 ui->locut_enabled->setChecked(global_mixer->get_audio_mixer()->get_locut_enabled());
196 ui->gainstaging_knob->setValue(global_mixer->get_audio_mixer()->get_gain_staging_db());
197 ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_audio_mixer()->get_gain_staging_auto());
198 ui->compressor_enabled->setChecked(global_mixer->get_audio_mixer()->get_compressor_enabled());
199 ui->limiter_enabled->setChecked(global_mixer->get_audio_mixer()->get_limiter_enabled());
200 ui->makeup_gain_auto_checkbox->setChecked(global_mixer->get_audio_mixer()->get_final_makeup_gain_auto());
202 ui->limiter_threshold_db_display->setText(
203 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
204 ui->compressor_threshold_db_display->setText(
205 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(), DB_WITH_SIGN)));
207 connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
208 cutoff_knob_changed(ui->locut_cutoff_knob->value());
209 connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
210 global_mixer->get_audio_mixer()->set_locut_enabled(state == Qt::Checked);
213 connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
214 connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
215 global_mixer->get_audio_mixer()->set_gain_staging_auto(state == Qt::Checked);
217 connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
218 connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
219 global_mixer->get_audio_mixer()->set_final_makeup_gain_auto(state == Qt::Checked);
222 connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
223 connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
224 connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
225 global_mixer->get_audio_mixer()->set_limiter_enabled(state == Qt::Checked);
227 connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
228 global_mixer->get_audio_mixer()->set_compressor_enabled(state == Qt::Checked);
230 connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
231 mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
233 struct sigaction act;
234 memset(&act, 0, sizeof(act));
235 act.sa_handler = schedule_cut_signal;
236 act.sa_flags = SA_RESTART;
237 sigaction(SIGHUP, &act, nullptr);
239 // Mostly for debugging. Don't override SIGINT, that's so evil if
240 // shutdown isn't instant.
241 memset(&act, 0, sizeof(act));
242 act.sa_handler = quit_signal;
243 act.sa_flags = SA_RESTART;
244 sigaction(SIGUSR1, &act, nullptr);
247 void MainWindow::mixer_shutting_down()
249 ui->me_live->clean_context();
250 ui->me_preview->clean_context();
251 for (Ui::Display *display : previews) {
252 display->display->clean_context();
256 void MainWindow::cut_triggered()
258 global_mixer->schedule_cut();
261 void MainWindow::x264_bitrate_triggered()
264 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);
265 if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
266 global_flags.x264_bitrate = new_bitrate;
267 global_mixer->change_x264_bitrate(new_bitrate);
271 void MainWindow::exit_triggered()
276 void MainWindow::about_triggered()
278 AboutDialog().exec();
281 void MainWindow::gain_staging_knob_changed(int value)
283 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
285 float gain_db = value * 0.1f;
286 global_mixer->get_audio_mixer()->set_gain_staging_db(gain_db);
288 // The label will be updated by the audio level callback.
291 void MainWindow::final_makeup_gain_knob_changed(int value)
293 ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
295 float gain_db = value * 0.1f;
296 global_mixer->get_audio_mixer()->set_final_makeup_gain_db(gain_db);
298 // The label will be updated by the audio level callback.
301 void MainWindow::cutoff_knob_changed(int value)
303 float octaves = value * 0.1f;
304 float cutoff_hz = 20.0 * pow(2.0, octaves);
305 global_mixer->get_audio_mixer()->set_locut_cutoff(cutoff_hz);
308 snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
309 ui->locut_cutoff_display->setText(buf);
312 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
315 if (estimated_seconds_left < 60.0) {
316 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
317 } else if (estimated_seconds_left < 1800.0) { // Less than half an hour: Xm Ys (red).
318 int s = lrintf(estimated_seconds_left);
321 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
322 } else if (estimated_seconds_left < 3600.0) { // Less than an hour: Xm.
323 int m = lrintf(estimated_seconds_left / 60.0);
324 snprintf(time_str, sizeof(time_str), "%dm", m);
325 } else if (estimated_seconds_left < 36000.0) { // Less than ten hours: Xh Ym.
326 int m = lrintf(estimated_seconds_left / 60.0);
329 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
330 } else { // More than ten hours: Xh.
331 int h = lrintf(estimated_seconds_left / 3600.0);
332 snprintf(time_str, sizeof(time_str), "%dh", h);
335 snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
337 std::string label = buf;
339 post_to_main_thread([this, label]{
340 disk_free_label->setText(QString::fromStdString(label));
341 ui->menuBar->setCornerWidget(disk_free_label); // Need to set this again for the sizing to get right.
345 void MainWindow::limiter_threshold_knob_changed(int value)
347 float threshold_dbfs = value * 0.1f;
348 global_mixer->get_audio_mixer()->set_limiter_threshold_dbfs(threshold_dbfs);
349 ui->limiter_threshold_db_display->setText(
350 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
353 void MainWindow::compressor_threshold_knob_changed(int value)
355 float threshold_dbfs = value * 0.1f;
356 global_mixer->get_audio_mixer()->set_compressor_threshold_dbfs(threshold_dbfs);
357 ui->compressor_threshold_db_display->setText(
358 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
361 void MainWindow::mini_fader_changed(Ui::AudioMiniView *ui, int channel, int value)
363 float volume_dbfs = value * 0.1f;
366 snprintf(buf, sizeof(buf), "%+.1f dB", volume_dbfs);
367 ui->fader_label->setText(buf);
370 void MainWindow::reset_meters_button_clicked()
372 global_mixer->reset_meters();
373 ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
374 ui->peak_display->setStyleSheet("");
377 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
378 float range_low_lufs, float range_high_lufs,
379 float gain_staging_db, float final_makeup_gain_db,
382 steady_clock::time_point now = steady_clock::now();
384 // The meters are somewhat inefficient to update. Only update them
385 // every 100 ms or so (we get updates every 5–20 ms).
386 double last_update_age = duration<double>(now - last_audio_level_callback).count();
387 if (last_update_age < 0.100) {
390 last_audio_level_callback = now;
392 post_to_main_thread([=]() {
393 ui->vu_meter->set_level(level_lufs);
394 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
395 ui->correlation_meter->set_correlation(correlation);
397 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
398 if (peak_db > -0.1f) { // -0.1 dBFS is EBU peak limit.
399 ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
401 ui->peak_display->setStyleSheet("");
404 ui->gainstaging_knob->blockSignals(true);
405 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
406 ui->gainstaging_knob->blockSignals(false);
407 ui->gainstaging_db_display->setText(
408 QString::fromStdString(format_db(gain_staging_db, DB_WITH_SIGN)));
410 ui->makeup_gain_knob->blockSignals(true);
411 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
412 ui->makeup_gain_knob->blockSignals(false);
413 ui->makeup_gain_db_display->setText(
414 QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
418 void MainWindow::relayout()
420 int height = ui->vertical_layout->geometry().height();
422 double remaining_height = height;
424 // Allocate the height; the most important part is to keep the main displays
425 // at 16:9 if at all possible.
426 double me_width = ui->me_preview->width();
427 double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
429 // TODO: Scale the widths when we need to do this.
430 if (me_height / double(height) > 0.8) {
431 me_height = height * 0.8;
433 remaining_height -= me_height + ui->vertical_layout->spacing();
435 // Space between the M/E displays and the audio strip.
436 remaining_height -= ui->vertical_layout->spacing();
438 // The previews will be constrained by the remaining height, and the width.
439 double preview_label_height = previews[0]->title_bar->geometry().height() +
440 previews[0]->main_vertical_layout->spacing();
441 int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
442 double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
443 remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
445 ui->vertical_layout->setStretch(0, lrintf(me_height));
446 ui->vertical_layout->setStretch(1, lrintf(remaining_height)); // Audio strip.
447 ui->vertical_layout->setStretch(2, lrintf(preview_height + preview_label_height));
449 // Set the widths for the previews.
450 double preview_width = preview_height * 16.0 / 9.0;
451 for (unsigned i = 0; i < previews.size(); ++i) {
452 ui->preview_displays->setStretch(i, lrintf(preview_width));
455 // The preview horizontal spacer.
456 double remaining_preview_width = preview_total_width - previews.size() * preview_width;
457 ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
460 void MainWindow::set_transition_names(vector<string> transition_names)
462 if (transition_names.size() < 1 || transition_names[0].empty()) {
463 transition_btn1->setText(QString(""));
465 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
466 ui->transition_btn1->setShortcut(QKeySequence("J"));
468 if (transition_names.size() < 2 || transition_names[1].empty()) {
469 transition_btn2->setText(QString(""));
471 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
472 ui->transition_btn2->setShortcut(QKeySequence("K"));
474 if (transition_names.size() < 3 || transition_names[2].empty()) {
475 transition_btn3->setText(QString(""));
477 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
478 ui->transition_btn3->setShortcut(QKeySequence("L"));
482 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
484 if (output >= Mixer::OUTPUT_INPUT0) {
485 unsigned channel = output - Mixer::OUTPUT_INPUT0;
486 previews[channel]->label->setText(name.c_str());
490 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
492 if (output >= Mixer::OUTPUT_INPUT0) {
493 unsigned channel = output - Mixer::OUTPUT_INPUT0;
494 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
498 void MainWindow::transition_clicked(int transition_number)
500 global_mixer->transition_clicked(transition_number);
503 void MainWindow::channel_clicked(int channel_number)
505 if (current_wb_pick_display == channel_number) {
506 // The picking was already done from eventFilter(), since we don't get
507 // the mouse pointer here.
509 global_mixer->channel_clicked(channel_number);
513 void MainWindow::wb_button_clicked(int channel_number)
515 current_wb_pick_display = channel_number;
516 QApplication::setOverrideCursor(Qt::CrossCursor);
519 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
521 if (current_wb_pick_display != -1 &&
522 event->type() == QEvent::MouseButtonRelease &&
523 watched->isWidgetType()) {
524 QApplication::restoreOverrideCursor();
525 if (watched == previews[current_wb_pick_display]->display) {
526 const QMouseEvent *mouse_event = (QMouseEvent *)event;
527 set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
529 // The user clicked on something else, give up.
530 // (The click goes through, which might not be ideal, but, yes.)
531 current_wb_pick_display = -1;
539 double srgb_to_linear(double x)
544 return pow((x + 0.055) / 1.055, 2.4);
550 void MainWindow::set_white_balance(int channel_number, int x, int y)
552 // Set the white balance to neutral for the grab. It's probably going to
553 // flicker a bit, but hopefully this display is not live anyway.
554 global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
555 previews[channel_number]->display->updateGL();
556 QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
558 double r = srgb_to_linear(qRed(reference_color) / 255.0);
559 double g = srgb_to_linear(qGreen(reference_color) / 255.0);
560 double b = srgb_to_linear(qBlue(reference_color) / 255.0);
561 global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
562 previews[channel_number]->display->updateGL();