+Region::maybe_invalidate_transients ()
+{
+ bool changed = !_onsets.empty();
+ _onsets.clear ();
+
+ if (_valid_transients || changed) {
+ send_change (PropertyChange (Properties::valid_transients));
+ return;
+ }
+}
+
+void
+Region::transients (AnalysisFeatureList& afl)
+{
+ int cnt = afl.empty() ? 0 : 1;
+
+ Region::merge_features (afl, _onsets, _position);
+ Region::merge_features (afl, _user_transients, _position + _transient_user_start - _start);
+ if (!_onsets.empty ()) {
+ ++cnt;
+ }
+ if (!_user_transients.empty ()) {
+ ++cnt;
+ }
+ if (cnt > 1 ) {
+ afl.sort ();
+ // remove exact duplicates
+ TransientDetector::cleanup_transients (afl, _session.frame_rate(), 0);
+ }
+}
+
+bool
+Region::has_transients () const