- if (child->name() == "Crossfade") {
-
- Crossfade *xfade;
-
- try {
- xfade = new Crossfade (*((const Playlist *)this), *child);
- }
-
- catch (failed_constructor& err) {
- // cout << string_compose (_("could not create crossfade object in playlist %1"),
- // _name)
- // << endl;
- continue;
- }
-
- Crossfades::iterator ci;
-
- for (ci = _crossfades.begin(); ci != _crossfades.end(); ++ci) {
- if (*(*ci) == *xfade) {
- break;
- }
- }
-
- if (ci == _crossfades.end()) {
- _crossfades.push_back (xfade);
- xfade->Invalidated.connect (mem_fun (*this, &AudioPlaylist::crossfade_invalidated));
- xfade->StateChanged.connect (mem_fun (*this, &AudioPlaylist::crossfade_changed));
- /* no need to notify here */
- } else {
- delete xfade;
- }
- }
-
- }
-
- return 0;
-}
-
-void
-AudioPlaylist::drop_all_states ()
-{
- set<Crossfade*> all_xfades;
- set<boost::shared_ptr<Region> > all_regions;
-
- /* find every region we've ever used, and add it to the set of
- all regions. same for xfades;
- */
-
- for (StateMap::iterator i = states.begin(); i != states.end(); ++i) {
-
- AudioPlaylist::State* apstate = dynamic_cast<AudioPlaylist::State*> (*i);
-
- for (RegionList::iterator r = apstate->regions.begin(); r != apstate->regions.end(); ++r) {
- all_regions.insert (*r);
- }
-
- for (Crossfades::iterator xf = apstate->crossfades.begin(); xf != apstate->crossfades.end(); ++xf) {
- all_xfades.insert (*xf);
- }
- }
-
- /* now remove from the "all" lists every region that is in the current list. */
-
- for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
- set<boost::shared_ptr<Region> >::iterator x = all_regions.find (*i);
- if (x != all_regions.end()) {
- all_regions.erase (x);
- }
- }
-
- /* ditto for every crossfade */
-
- for (list<Crossfade*>::iterator i = _crossfades.begin(); i != _crossfades.end(); ++i) {
- set<Crossfade*>::iterator x = all_xfades.find (*i);
- if (x != all_xfades.end()) {
- all_xfades.erase (x);