Create a new layer if required on record to a track in stacked mode. Fixes #3391.

git-svn-id: svn://localhost/ardour2/branches/3.0@8026 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 24 insertions, 0 deletions

diff --git a/libs/ardour/playlist.cc b/libs/ardour/playlist.cc
index e462bceb10..971ed8b2e8 100644
--- a/libs/ardour/playlist.cc
+++ b/libs/ardour/playlist.cc
@@ -2981,3 +2981,27 @@ Playlist::remove_region_by_source (boost::shared_ptr<Source> s)
 		i = j;
 	}
 }
+
+/** Look from a session frame time and find the start time of the next region
+ *  which is on the top layer of this playlist.
+ *  @param t Time to look from.
+ *  @return Position of next top-layered region, or max_framepos if there isn't one.
+ */
+framepos_t
+Playlist::find_next_top_layer_position (framepos_t t) const
+{
+	RegionLock rlock (const_cast<Playlist *> (this));
+	
+	layer_t const top = top_layer ();
+
+	RegionList copy = regions.rlist ();
+	copy.sort (RegionSortByPosition ());
+
+	for (RegionList::const_iterator i = copy.begin(); i != copy.end(); ++i) {
+		if ((*i)->position() >= t && (*i)->layer() == top) {
+			return (*i)->position();
+		}
+	}
+
+	return max_framepos;
+}