Soloing

generator/solo/analysis.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 import dataclasses
 import fractions
 import hashlib
+import json
 
 import generator.harmony
 import generator.model
@@ -16,6 +17,16 @@ class Analysis:
   tempo: fractions.Fraction
   melody: tuple[generator.solo.types.Note, ...]
 
+def identity(analysis, measures, part):
+  anchor = analysis.melody[0].pitch.number() if analysis.melody else 0
+  melody = [(str(n.start), str(n.end), n.pitch.number() - anchor) for n in analysis.melody]
+  harmony = []
+  for measure in measures:
+    for chord in measure['harmonies']:
+      pitches = sorted((int(p) - anchor) % 12 for p in generator.harmony.pitch_classes(chord)) if chord['kind'] != 'none' else []
+      harmony.append((chord['kind'], pitches, chord['onset']))
+  return hashlib.sha256(json.dumps((part, melody, harmony), sort_keys=True).encode()).hexdigest()
+
 def attacks(document: dict) -> tuple[generator.solo.types.Note, ...]:
   """Collapse tied tones before extracting monophonic melody fragments."""
   result, pending = [], {}