+ return 0;
+}
+
+string
+RegionFactory::compound_region_name (const string& playlist, uint32_t compound_ops, uint32_t depth, bool whole_source)
+{
+ if (whole_source) {
+ return string_compose (_("%1 compound-%2 (%3)"), playlist, compound_ops+1, depth+1);
+ } else {
+ return string_compose (_("%1 compound-%2.1 (%3)"), playlist, compound_ops+1, depth+1);
+ }
+}
+
+string
+RegionFactory::new_region_name (string old)
+{
+ string::size_type last_period;
+ uint32_t number;
+ string::size_type len = old.length() + 64;
+ string remainder;
+ char buf[len];
+
+ if ((last_period = old.find_last_of ('.')) == string::npos) {
+
+ /* no period present - add one explicitly */
+
+ old += '.';
+ last_period = old.length() - 1;
+ number = 0;
+
+ } else {
+
+ if (last_period < old.length() - 1) {
+
+ string period_to_end = old.substr (last_period+1);
+
+ /* extra material after the period */
+
+ string::size_type numerals_end = period_to_end.find_first_not_of ("0123456789");
+
+ number = atoi (period_to_end);
+
+ if (numerals_end < period_to_end.length() - 1) {
+ /* extra material after the end of the digits */
+ remainder = period_to_end.substr (numerals_end);
+ }
+
+ } else {
+ last_period = old.length();
+ number = 0;
+ }
+ }
+
+ while (number < (UINT_MAX-1)) {
+
+ const RegionMap& regions (RegionFactory::regions());
+ RegionMap::const_iterator i;
+ string sbuf;
+
+ number++;
+
+ snprintf (buf, len, "%s%" PRIu32 "%s", old.substr (0, last_period + 1).c_str(), number, remainder.c_str());
+ sbuf = buf;
+
+ for (i = regions.begin(); i != regions.end(); ++i) {
+ if (i->second->name() == sbuf) {
+ break;
+ }
+ }
+
+ if (i == regions.end()) {
+ break;
+ }
+ }
+
+ if (number != (UINT_MAX-1)) {
+ return buf;
+ }
+
+ error << string_compose (_("cannot create new name for region \"%1\""), old) << endmsg;
+ return old;
+}
+
+void
+RegionFactory::get_regions_using_source (boost::shared_ptr<Source> s, std::set<boost::shared_ptr<Region> >& r)
+{
+ Glib::Mutex::Lock lm (region_map_lock);
+
+ for (RegionMap::iterator i = region_map.begin(); i != region_map.end(); ++i) {
+ if (i->second->uses_source (s)) {
+ r.insert (i->second);
+ }
+ }
+}
+
+void
+RegionFactory::remove_regions_using_source (boost::shared_ptr<Source> src)
+{
+ Glib::Mutex::Lock lm (region_map_lock);
+
+ for (RegionMap::iterator i = region_map.begin(); i != region_map.end(); ++i) {
+ if (i->second->uses_source (src)) {
+ region_map.erase (i);
+ }
+ }
+}
+
+void
+RegionFactory::add_compound_association (boost::shared_ptr<Region> orig, boost::shared_ptr<Region> copy)
+{
+ Glib::Mutex::Lock lm (region_map_lock);
+ _compound_associations[copy] = orig;