khodowany
33 lines
2.2 KiB
Python
33 lines
2.2 KiB
Python
import copy, fractions
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import generator.model, generator.parts, generator.harmony
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import generator.source, generator.solo.composer, generator.solo.types
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import tests.test_musicxml
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import generator.harmonic_time
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def song(meter=4, count=6, chords=('Dm7', 'G7', 'CM7')):
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document = tests.test_musicxml.parse(tests.test_musicxml.xml_score(''.join(tests.test_musicxml.xml_note(step, 1, 'quarter') for step in ('C', 'D', 'E', 'G'))))
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first = document['staves'][0]['measures'][0]
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measures = []
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for index in range(count):
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measure = copy.deepcopy(first)
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measure.update(id=f'measure_{index + 1}', number=str(index + 1), duration=generator.model.rational(meter), meter={'groups': [{'beats': [meter], 'unit': 4}]}, time_signature=f'{meter}/4')
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measure['voices'][0]['notes'] = [generator.model.make_event(f'source_{index}_{beat}', fractions.Fraction(beat), fractions.Fraction(1), 'note', [{'letter': 'cdefg'[beat % 5], 'octave': 4, 'alter': 0}]) for beat in range(meter)]
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measure['harmonies'] = [{**generator.harmony.parse_symbol(chords[index % len(chords)]), 'id': f'h_{index}', 'onset': generator.model.rational(0)}] if chords else []
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for harmony in measure['harmonies']:
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harmony['symbol'] = generator.harmony.symbol(harmony)
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measures.append(measure)
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document['staves'][0]['measures'] = measures
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return generator.parts.prepare_document(document)
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def compose(document, part='acoustic', cutoff=None):
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analysis = generator.source.analyze(document)
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measures = document['staves'][0]['measures']
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end = sum(generator.model.fraction(m['duration']) for m in measures) if cutoff is None else cutoff
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return generator.solo.composer.compose(analysis, measures, part, end)
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def note(start, end, letter='g', alter=0, octave=4, **kwargs):
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return generator.solo.types.Note(fractions.Fraction(start), fractions.Fraction(end), generator.solo.types.Pitch(letter, fractions.Fraction(alter), octave), **kwargs)
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def choices(symbols, duration=4):
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return tuple(generator.harmonic_time.ChordSpan(fractions.Fraction(i * duration), fractions.Fraction((i + 1) * duration), i + 1, str(i + 1), fractions.Fraction(1), generator.model.key_from_fifths(-1), generator.harmony.parse_symbol(symbol)) for i, symbol in enumerate(symbols))
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