Initial implementation of monitor/record MIDI

Author: ideoforms

isobar/io/dummy/input.py

@@ -0,0 +1,20 @@
+from ..midinote import MidiNote
+
+class DummyInputDevice:
+    def __init__(self):
+        self.on_note_on = None
+        self.on_note_off = None
+        
+    def add_note_on_handler(self, callback):
+        self.on_note_on = callback
+        
+    def add_note_off_handler(self, callback):
+        self.on_note_off = callback
+        
+    def note_on(self, pitch, velocity, channel=0):
+        if self.on_note_on:
+            self.on_note_on(MidiNote(pitch=pitch, velocity=velocity, channel=channel))
+
+    def note_off(self, pitch, channel=0):
+        if self.on_note_off:
+            self.on_note_off(MidiNote(pitch=pitch, velocity=0, channel=channel))