+ ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
+
+ float gain_db = value * 0.1f;
+ global_mixer->get_audio_mixer()->set_final_makeup_gain_db(gain_db);
+
+ // The label will be updated by the audio level callback.
+}
+
+void MainWindow::cutoff_knob_changed(int value)
+{
+ float octaves = value * 0.1f;
+ float cutoff_hz = 20.0 * pow(2.0, octaves);
+ global_mixer->get_audio_mixer()->set_locut_cutoff(cutoff_hz);
+
+ char buf[256];
+ snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
+ ui->locut_cutoff_display->setText(buf);
+}
+
+void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
+{
+ char time_str[256];
+ if (estimated_seconds_left < 60.0) {
+ strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
+ } else if (estimated_seconds_left < 1800.0) { // Less than half an hour: Xm Ys (red).
+ int s = lrintf(estimated_seconds_left);
+ int m = s / 60;
+ s %= 60;
+ snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
+ } else if (estimated_seconds_left < 3600.0) { // Less than an hour: Xm.
+ int m = lrintf(estimated_seconds_left / 60.0);
+ snprintf(time_str, sizeof(time_str), "%dm", m);
+ } else if (estimated_seconds_left < 36000.0) { // Less than ten hours: Xh Ym.
+ int m = lrintf(estimated_seconds_left / 60.0);
+ int h = m / 60;
+ m %= 60;
+ snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
+ } else { // More than ten hours: Xh.
+ int h = lrintf(estimated_seconds_left / 3600.0);
+ snprintf(time_str, sizeof(time_str), "%dh", h);
+ }
+ char buf[256];
+ snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
+
+ std::string label = buf;
+
+ post_to_main_thread([this, label]{
+ disk_free_label->setText(QString::fromStdString(label));
+ ui->menuBar->setCornerWidget(disk_free_label); // Need to set this again for the sizing to get right.
+ });
+}
+
+void MainWindow::limiter_threshold_knob_changed(int value)
+{
+ float threshold_dbfs = value * 0.1f;
+ global_mixer->get_audio_mixer()->set_limiter_threshold_dbfs(threshold_dbfs);
+ ui->limiter_threshold_db_display->setText(
+ QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
+}
+
+void MainWindow::compressor_threshold_knob_changed(int value)
+{
+ float threshold_dbfs = value * 0.1f;
+ global_mixer->get_audio_mixer()->set_compressor_threshold_dbfs(threshold_dbfs);
+ ui->compressor_threshold_db_display->setText(
+ QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
+}
+
+void MainWindow::mini_fader_changed(Ui::AudioMiniView *ui, int channel, int value)
+{
+ float volume_db = value * 0.1f;
+
+ char buf[256];
+ snprintf(buf, sizeof(buf), "%+.1f dB", volume_db);
+ ui->fader_label->setText(buf);
+
+ global_mixer->get_audio_mixer()->set_fader_volume(channel, volume_db);
+}
+
+void MainWindow::reset_meters_button_clicked()
+{
+ global_mixer->reset_meters();
+ ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
+ ui->peak_display->setStyleSheet("");
+}
+
+void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
+ float range_low_lufs, float range_high_lufs,
+ float gain_staging_db, float final_makeup_gain_db,
+ float correlation)
+{
+ steady_clock::time_point now = steady_clock::now();
+
+ // The meters are somewhat inefficient to update. Only update them
+ // every 100 ms or so (we get updates every 5–20 ms).
+ double last_update_age = duration<double>(now - last_audio_level_callback).count();
+ if (last_update_age < 0.100) {
+ return;
+ }
+ last_audio_level_callback = now;
+
+ post_to_main_thread([=]() {
+ ui->vu_meter->set_level(level_lufs);
+ ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
+ ui->correlation_meter->set_correlation(correlation);
+
+ ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
+ if (peak_db > -0.1f) { // -0.1 dBFS is EBU peak limit.
+ ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
+ } else {
+ ui->peak_display->setStyleSheet("");
+ }
+
+ ui->gainstaging_knob->blockSignals(true);
+ ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
+ ui->gainstaging_knob->blockSignals(false);
+ ui->gainstaging_db_display->setText(
+ QString::fromStdString(format_db(gain_staging_db, DB_WITH_SIGN)));
+
+ ui->makeup_gain_knob->blockSignals(true);
+ ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
+ ui->makeup_gain_knob->blockSignals(false);
+ ui->makeup_gain_db_display->setText(
+ QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
+ });
+}
+
+void MainWindow::relayout()
+{
+ int height = ui->vertical_layout->geometry().height();
+
+ double remaining_height = height;
+
+ // Allocate the height; the most important part is to keep the main displays
+ // at 16:9 if at all possible.
+ double me_width = ui->me_preview->width();
+ double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
+
+ // TODO: Scale the widths when we need to do this.
+ if (me_height / double(height) > 0.8) {
+ me_height = height * 0.8;
+ }
+ remaining_height -= me_height + ui->vertical_layout->spacing();
+
+ // Space between the M/E displays and the audio strip.
+ remaining_height -= ui->vertical_layout->spacing();
+
+ // The previews will be constrained by the remaining height, and the width.
+ double preview_label_height = previews[0]->title_bar->geometry().height() +
+ previews[0]->main_vertical_layout->spacing();
+ int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
+ double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
+ remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
+
+ ui->vertical_layout->setStretch(0, lrintf(me_height));
+ ui->vertical_layout->setStretch(1, lrintf(remaining_height)); // Audio strip.
+ ui->vertical_layout->setStretch(2, lrintf(preview_height + preview_label_height));
+
+ // Set the widths for the previews.
+ double preview_width = preview_height * 16.0 / 9.0;
+ for (unsigned i = 0; i < previews.size(); ++i) {
+ ui->preview_displays->setStretch(i, lrintf(preview_width));
+ }
+
+ // The preview horizontal spacer.
+ double remaining_preview_width = preview_total_width - previews.size() * preview_width;
+ ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
+}
+
+void MainWindow::set_transition_names(vector<string> transition_names)
+{
+ if (transition_names.size() < 1 || transition_names[0].empty()) {
+ transition_btn1->setText(QString(""));
+ } else {
+ transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
+ ui->transition_btn1->setShortcut(QKeySequence("J"));
+ }
+ if (transition_names.size() < 2 || transition_names[1].empty()) {
+ transition_btn2->setText(QString(""));
+ } else {
+ transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
+ ui->transition_btn2->setShortcut(QKeySequence("K"));
+ }
+ if (transition_names.size() < 3 || transition_names[2].empty()) {
+ transition_btn3->setText(QString(""));
+ } else {
+ transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
+ ui->transition_btn3->setShortcut(QKeySequence("L"));
+ }
+}
+
+void MainWindow::update_channel_name(Mixer::Output output, const string &name)
+{
+ if (output >= Mixer::OUTPUT_INPUT0) {
+ unsigned channel = output - Mixer::OUTPUT_INPUT0;
+ previews[channel]->label->setText(name.c_str());
+ }
+}
+
+void MainWindow::update_channel_color(Mixer::Output output, const string &color)
+{
+ if (output >= Mixer::OUTPUT_INPUT0) {
+ unsigned channel = output - Mixer::OUTPUT_INPUT0;
+ previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
+ }
+}
+
+void MainWindow::transition_clicked(int transition_number)
+{
+ global_mixer->transition_clicked(transition_number);
+}
+
+void MainWindow::channel_clicked(int channel_number)
+{
+ if (current_wb_pick_display == channel_number) {
+ // The picking was already done from eventFilter(), since we don't get
+ // the mouse pointer here.
+ } else {
+ global_mixer->channel_clicked(channel_number);
+ }
+}
+
+void MainWindow::wb_button_clicked(int channel_number)
+{
+ current_wb_pick_display = channel_number;
+ QApplication::setOverrideCursor(Qt::CrossCursor);
+}
+
+bool MainWindow::eventFilter(QObject *watched, QEvent *event)
+{
+ if (current_wb_pick_display != -1 &&
+ event->type() == QEvent::MouseButtonRelease &&
+ watched->isWidgetType()) {
+ QApplication::restoreOverrideCursor();
+ if (watched == previews[current_wb_pick_display]->display) {
+ const QMouseEvent *mouse_event = (QMouseEvent *)event;
+ set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
+ } else {
+ // The user clicked on something else, give up.
+ // (The click goes through, which might not be ideal, but, yes.)
+ current_wb_pick_display = -1;
+ }
+ }
+ return false;
+}
+
+namespace {
+
+double srgb_to_linear(double x)
+{
+ if (x < 0.04045) {
+ return x / 12.92;
+ } else {
+ return pow((x + 0.055) / 1.055, 2.4);
+ }
+}
+
+} // namespace
+
+void MainWindow::set_white_balance(int channel_number, int x, int y)
+{
+ // Set the white balance to neutral for the grab. It's probably going to
+ // flicker a bit, but hopefully this display is not live anyway.
+ global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
+ previews[channel_number]->display->updateGL();
+ QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
+
+ double r = srgb_to_linear(qRed(reference_color) / 255.0);
+ double g = srgb_to_linear(qGreen(reference_color) / 255.0);
+ double b = srgb_to_linear(qBlue(reference_color) / 255.0);
+ global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
+ previews[channel_number]->display->updateGL();