- mixer->set_audio_level_callback([this](float level_lufs, float peak_db, float global_level_lufs, float range_low_lufs, float range_high_lufs, float auto_gain_staging_db){
- 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);
-
- char buf[256];
- snprintf(buf, sizeof(buf), "%.1f", peak_db);
- ui->peak_display->setText(buf);
- 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->setValue(lrintf(auto_gain_staging_db * 10.0f));
- snprintf(buf, sizeof(buf), "%+.1f dB", auto_gain_staging_db);
- ui->gainstaging_db_display->setText(buf);
- });
+ // 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->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::limiter_threshold_knob_changed(int value)
+{
+ float threshold_dbfs = value * 0.1f;
+ global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
+
+ char buf[256];
+ snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
+ ui->limiter_threshold_db_display->setText(buf);
+}
+
+void MainWindow::compressor_threshold_knob_changed(int value)
+{
+ float threshold_dbfs = value * 0.1f;
+ global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
+
+ char buf[256];
+ snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
+ ui->compressor_threshold_db_display->setText(buf);
+}
+
+void MainWindow::reset_meters_button_clicked()
+{
+ global_mixer->reset_meters();
+ ui->peak_display->setText("-inf");
+ 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)
+{
+ timeval now;
+ gettimeofday(&now, nullptr);
+
+ // 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 = now.tv_sec - last_audio_level_callback.tv_sec +
+ 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
+ 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);
+
+ char buf[256];
+ snprintf(buf, sizeof(buf), "%.1f", peak_db);
+ ui->peak_display->setText(buf);
+ 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->setValue(lrintf(gain_staging_db * 10.0f));
+ snprintf(buf, sizeof(buf), "%+.1f dB", gain_staging_db);
+ ui->gainstaging_db_display->setText(buf);
+
+ ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
+ snprintf(buf, sizeof(buf), "%+.1f dB", final_makeup_gain_db);
+ ui->makeup_gain_db_display->setText(buf);