Cache pedal resolve (#107)

aria/data/midi.py

@@ -99,6 +99,8 @@ def __init__(
         self.ticks_per_beat = ticks_per_beat
         self.metadata = metadata
 
+        self.pedal_resolved = False  # Default value
+
         # Special case that temo_msg is empty, in this case we spoof the default
         if not self.tempo_msgs:
             self.tempo_msgs = [
@@ -248,6 +250,12 @@ def _resolve_overlaps(self):
 
     def resolve_pedal(self):
         """Resolve pedal - extend note offsets and resolve note overlaps"""
+        # If has been already resolved, we don't recalculate
+        if self.pedal_resolved == True:
+            return self
+
+        assert self.pedal_resolved == False, "Internal error"
+
         # Organize note messages by channel
         note_msgs_c = defaultdict(list)
         for msg in self.note_msgs:
@@ -265,6 +273,8 @@ def resolve_pedal(self):
                         msg["data"]["end"] = pedal_end
                         break
 
+        self.pedal_resolved = True
+
         return self._resolve_overlaps()
 
     # TODO: