Wouldn't it be nice if plugin presets had a description/comment?

[ardour.git] / libs / ardour / processor.cc

diff --git a/libs/ardour/processor.cc b/libs/ardour/processor.cc
index 19b6f303672abc013dd7ac728b09642a486bd54e..39c3d68ad7941d8ac35a852e057cd2f0486521f6 100644 (file)
--- a/libs/ardour/processor.cc
+++ b/libs/ardour/processor.cc
@@ -275,6 +275,34 @@ Processor::configure_io (ChanCount in, ChanCount out)
        return true;
 }
 
+bool
+Processor::map_loop_range (samplepos_t& start, samplepos_t& end) const
+{
+       if (!_loop_location) {
+               return false;
+       }
+       if (start >= end) {
+               /* no backwards looping */
+               return false;
+       }
+
+       const samplepos_t loop_end = _loop_location->end ();
+       if (start < loop_end) {
+               return false;
+       }
+
+       const samplepos_t loop_start   = _loop_location->start ();
+       const samplecnt_t looplen      = loop_end - loop_start;
+       const sampleoffset_t start_off = (start - loop_start) % looplen;
+       const samplepos_t start_pos    = loop_start + start_off;
+
+       assert (start >= start_pos);
+       end -= start - start_pos;
+       start = start_pos;
+       assert (end > start);
+       return true;
+}
+
 void
 Processor::set_display_to_user (bool yn)
 {