+double Tracks::align_timecodes()
+{
+ double offset = -1;
+ for( Track *track=first; track; track=track->next ) {
+ if( !track->is_armed() ) continue;
+ double early_offset = track->edits->early_timecode();
+ if( offset < 0 || offset > early_offset )
+ offset = early_offset;
+ }
+ if( offset >= 0 ) {
+ for( Track *track=first; track; track=track->next ) {
+ if( !track->is_armed() ) continue;
+ track->edits->align_timecodes(offset);
+ }
+ }
+ return offset;
+}
+
+void Tracks::update_idxbl_length(int id, double dt)
+{
+ for( Track *track=first; track; track=track->next ) {
+ if( !track->is_armed() ) continue;
+ int64_t du = track->to_units(dt,0);
+ track->edits->update_idxbl_length(id, du);
+ track->optimize();
+ }
+}
+
+void Tracks::create_keyframes(double position, int mask, int mode)
+{
+ for( Track *track=first; track; track=track->next ) {
+ if( !track->is_armed() ) continue;
+ track->create_keyframes(position, mask, mode);
+ }
+}
+