khodowany
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"""Meter-specific vocabulary and source-derived quintuple grouping."""
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import concurrent.futures
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import copy
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import fractions
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import json
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import multiprocessing
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import pathlib
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import tempfile
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import unittest
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import unittest.mock
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import generator.accompaniment
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import generator.comping
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import generator.comping_rhythm
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import generator.model
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import generator.production
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import generator.vocabulary
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import tests.solo_fixtures
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import tests.test_comping_cycles
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F = fractions.Fraction
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class CompingMeters(unittest.TestCase):
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def source(self, beats=5, count=10, explicit=()):
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source = tests.solo_fixtures.song(meter=beats, count=count, chords=('C7', 'FM7'))
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if explicit:
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for m in source['staves'][0]['measures']:
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m['meter']['groups'][0]['beats'] = list(explicit)
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m['time_signature'] = generator.model.meter_label(m['meter'])
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source['metadata']['time_signature'] = source['staves'][0]['measures'][0]['time_signature']
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return source
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def test_balanced_pools_and_all_families_reach_joint_evaluation(self):
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for beats, grouping in ((4, ()), (3, ()), (5, (3, 2)), (5, (2, 3))):
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source = self.source(beats, 2, grouping)
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inputs = tests.test_comping_cycles.groups(source)[0]
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flat = generator.comping_rhythm.flatten(inputs)
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for role in ('acoustic', 'electric'):
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with self.subTest(beats=beats, grouping=grouping, role=role):
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policy = generator.vocabulary.accompaniment(role)
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pool = generator.comping_rhythm.patterns_for(policy, flat, (F(beats),) * 2, grouping)
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self.assertEqual(len(pool), 24)
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self.assertEqual(len({generator.comping_rhythm.identity(p) for p in pool}), 24)
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self.assertEqual(len({p['family'] for p in pool}), 11 if beats == 4 else 12)
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candidates = generator.comping_rhythm.candidates(flat, None, role, (), 'coverage', lengths=(F(beats),) * 2, grouping=grouping)
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self.assertEqual({p['family'] for p in pool}, {dict(c.families)['pattern'] for c in candidates})
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for p in pool:
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fitted = generator.comping_rhythm.realize(p, inputs, role, generator.comping_rhythm.melody_contexts(source))
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self.assertIsNotNone(fitted, p['id'])
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generator.comping_rhythm.validate_events(fitted.events, role)
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for start in (0, beats):
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self.assertLessEqual(len({e.start for e in fitted.events if start <= e.start < start + beats}), 3 if role == 'acoustic' else 2)
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if role == 'electric':
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self.assertTrue(any(F(e['onset']) < beats < F(e['onset']) + F(e['duration']) for p in pool for e in p['events']))
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def test_explicit_grouping_overrides_harmony_and_melody(self):
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source = self.source(explicit=(2, 3))
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for m in source['staves'][0]['measures']:
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m['harmonies'].append({**generator.harmony.parse_symbol('G7'), 'id': 'secondary', 'onset': generator.model.rational(3)})
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grouping, evidence = generator.comping_rhythm.grouping_for(tests.test_comping_cycles.groups(source), generator.comping_rhythm.melody_contexts(source))
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self.assertEqual(grouping, (2, 3))
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self.assertEqual(evidence['reason'], 'written')
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def test_harmonic_boundary_then_melodic_entrances_then_attacks(self):
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for boundary in (2, 3):
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source = self.source()
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for m in source['staves'][0]['measures']:
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m['harmonies'].append({**generator.harmony.parse_symbol('G7'), 'id': 'secondary', 'onset': generator.model.rational(boundary)})
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grouping, _ = generator.comping_rhythm.grouping_for(tests.test_comping_cycles.groups(source), generator.comping_rhythm.melody_contexts(source))
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self.assertEqual(grouping, (boundary, 5 - boundary))
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source = self.source()
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# Competing secondary pulses have equal attack counts. Only one follows
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# an actual rest; an uninterrupted reattack is weaker grouping evidence.
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other = 5 - boundary
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contexts = tuple(((F(other) - F(1, 2), F(other)), (F(other), F(other) + F(1, 2)), (F(boundary), F(boundary) + F(1, 2))) for _ in range(10))
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grouping, _ = generator.comping_rhythm.grouping_for(tests.test_comping_cycles.groups(source), contexts)
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self.assertEqual(grouping, (boundary, 5 - boundary))
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contexts = tuple(((F(boundary), F(boundary + 1)),) for _ in range(10))
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grouping, _ = generator.comping_rhythm.grouping_for(tests.test_comping_cycles.groups(source), contexts)
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self.assertEqual(grouping, (boundary, 5 - boundary))
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def test_same_chord_marking_is_not_a_harmonic_change(self):
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source = self.source()
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for m in source['staves'][0]['measures']:
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m['harmonies'].append({**m['harmonies'][0], 'onset': generator.model.rational(2)})
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grouping, evidence = generator.comping_rhythm.grouping_for(tests.test_comping_cycles.groups(source), generator.comping_rhythm.melody_contexts(source))
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self.assertEqual(grouping, (3, 2))
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self.assertEqual(evidence['reason'], 'default_3+2')
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def test_not_just_equal_measure_length(self):
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source = self.source(3)
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m = source['staves'][0]['measures'][0]
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m.update(meter={'groups': [{'beats': [6], 'unit': 8}]}, time_signature='6/8')
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with self.assertRaisesRegex(ValueError, 'no comping vocabulary for 6/8'):
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generator.comping.Canonical(source, 'electric', 'compound')
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def test_schema_rejects_wrong_meter_lengths_and_missing_grouping(self):
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root = pathlib.Path('data/composition')
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contents = {p.stem: p.read_text() for p in root.glob('*.json')}
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for change in ({'meter': '3/4'}, {'grouping': []}, {'grouping': [4, 1]}):
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value = json.loads(contents['accompaniment'])
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pattern = next(p for p in value['instruments']['electric']['patterns'] if p['meter'] == '5/4')
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pattern.update(change)
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with self.assertRaises(ValueError):
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generator.vocabulary._load(tuple((name, json.dumps(value) if name == 'accompaniment' else text) for name, text in contents.items()))
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def test_full_cycles_odd_forms_and_grouping_consistency(self):
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for beats, grouping in ((4, ()), (3, ()), (5, (3, 2)), (5, (2, 3))):
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source = self.source(beats, 9, grouping)
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reports = []
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for role, width in (('acoustic', 2), ('electric', 4)):
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canonical = generator.comping.Canonical(source, role, 'cycles')
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report = canonical.groove_report[0]
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reports.append(report)
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self.assertEqual(report['cycle_patterns'], width)
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self.assertEqual(report['eligible_patterns'], 24)
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self.assertIsNone(report['reduction'])
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for location in canonical.locations.values():
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slot = location['cycle_slot']
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self.assertEqual(location['base_pattern'], report['patterns'][slot])
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last = canonical.block_rhythms[8]
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self.assertTrue(all(0 <= e.start < e.end <= beats for e in last.events))
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self.assertEqual(reports[0]['grouping'], reports[1]['grouping'])
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def test_grouping_changes_restart_and_fills_cannot_cross_groups(self):
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source = self.source(count=18, explicit=(3, 2))
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for m in source['staves'][0]['measures'][9:]:
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m['meter']['groups'][0]['beats'] = [2, 3]
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m['time_signature'] = '2+3/4'
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for role in ('acoustic', 'electric'):
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canonical = generator.comping.Canonical(source, role, 'change')
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self.assertEqual([r['grouping'] for r in canonical.groove_report], [[3, 2], [2, 3]])
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self.assertEqual(canonical.locations[9]['cycle_slot'], 0)
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for pattern, _ in canonical.patterns.values():
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suffix = '.' + '+'.join(map(str, pattern['grouping'])) + '.'
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if '.fill.' in pattern['id']:
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self.assertTrue(all(suffix in p for p in pattern['id'].split('.fill.')))
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def test_every_fill_candidate_uses_its_base_grouping(self):
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source = self.source(count=16, explicit=(2, 3))
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checked = []
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realize = generator.comping_rhythm.realize
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def inspect(pattern, *args, **kwargs):
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if '.fill.' in pattern['id']:
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checked.append(pattern['id'])
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self.assertTrue(all('.2+3.' in p for p in pattern['id'].split('.fill.')))
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return realize(pattern, *args, **kwargs)
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with unittest.mock.patch.object(generator.comping_rhythm, 'realize', side_effect=inspect):
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generator.comping.Canonical(source, 'electric', 'fill-group')
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self.assertTrue(checked)
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def test_partial_pickup_and_mid_pattern_entry_keep_meter_and_phase(self):
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for beats in (3, 5):
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source = self.source(beats)
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m = copy.deepcopy(source['staves'][0]['measures'][0])
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m['duration'] = generator.model.rational(F(3, 2))
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candidates = generator.comping_rhythm.candidates(m, None, 'electric', (), 'pickup')
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self.assertTrue(candidates)
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self.assertTrue(all(0 <= e.start < e.end <= F(3, 2) for c in candidates for e in c.events))
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for role in ('acoustic', 'electric'):
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canonical = generator.comping.Canonical(source, role, 'entry')
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measures = source['staves'][0]['measures']
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carried = generator.accompaniment.carried_chords(measures)
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full = canonical(measures[3], carried[3], 3)
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partial = canonical(measures[3], carried[3], 3, bounds=(3, 10))
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# Rest engraving can split differently at a sliced boundary. Sounded
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# onsets, releases, voicings and tie relationships must remain equal.
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self.assertEqual([n for n in tests.test_comping_cycles.signature(full) if n[-1]], [n for n in tests.test_comping_cycles.signature(partial) if n[-1]])
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def test_unused_meter_and_other_role_data_do_not_reseed(self):
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resources = generator.vocabulary.load()
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measures = self.source(4)['staves'][0]['measures']
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baseline = generator.production.dependencies('acoustic_accompaniment', resources, measures)
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changed = copy.deepcopy(resources)
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for role, policy in changed['accompaniment']['instruments'].items():
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for p in policy['patterns']:
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if role == 'electric' or p['meter'] in ('3/4', '5/4'):
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p['events'] = []
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self.assertEqual(baseline, generator.production.dependencies('acoustic_accompaniment', changed, measures))
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changed['accompaniment']['instruments']['acoustic']['patterns'][0]['events'] = []
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self.assertNotEqual(baseline, generator.production.dependencies('acoustic_accompaniment', changed, measures))
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def test_chord_changes_anticipations_and_cross_bar_ties(self):
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for beats, grouping in ((4, ()), (3, ()), (5, (3, 2)), (5, (2, 3))):
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source = self.source(beats, 2, grouping)
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for m in source['staves'][0]['measures']:
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m['harmonies'].append({**generator.harmony.parse_symbol('G7'), 'id': 'middle', 'onset': generator.model.rational(beats - 1)})
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inputs = tests.test_comping_cycles.groups(source)[0]
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for role in ('acoustic', 'electric'):
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pool = generator.comping_rhythm.patterns_for(generator.vocabulary.accompaniment(role), inputs[0][0], (F(beats),) * 2, grouping)
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anticipated = False
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for p in pool:
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result = generator.comping_rhythm.realize(p, inputs, role, generator.comping_rhythm.melody_contexts(source), anticipate=True)
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self.assertIsNotNone(result, p['id'])
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generator.comping_rhythm.validate_events(result.events, role)
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for e in result.events:
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if e.harmonic_time is not None:
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anticipated = True
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self.assertEqual(e.harmonic_time - e.start, F(1, 2))
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self.assertTrue(anticipated)
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def test_roles_are_deterministic_alone_cached_and_parallel(self):
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for meter in (3, 5):
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source = generator.production.SourceAnalysis.read(self.source(meter, 9))
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roles = ('acoustic_accompaniment', 'electric_accompaniment')
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with tempfile.TemporaryDirectory() as cache:
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clean = {r: generator.production.generate_role(source, r, pathlib.Path('data')) for r in roles}
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for role in reversed(roles):
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cold = generator.production.generate_role(source, role, pathlib.Path('data'), cache_dir=cache)
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warm = generator.production.generate_role(source, role, pathlib.Path('data'), cache_dir=cache)
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self.assertEqual(clean[role]['document'], cold['document'])
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self.assertEqual(cold['document'], warm['document'])
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self.assertTrue(warm['cache_hit'])
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with concurrent.futures.ProcessPoolExecutor(max_workers=2, mp_context=multiprocessing.get_context('spawn')) as pool:
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jobs = {r: pool.submit(generator.production._job, (source, r, pathlib.Path('data'), {}, None)) for r in reversed(roles)}
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for role, job in jobs.items():
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self.assertEqual(clean[role]['document'], job.result()['document'])
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if __name__ == '__main__':
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unittest.main()
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