khodowany
135 lines
7.4 KiB
Python
135 lines
7.4 KiB
Python
from __future__ import annotations
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import copy
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import fractions
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import pathlib
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import generator.accompaniment
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import generator.arrange.form
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import generator.guitar
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import generator.model
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import generator.musicxml
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import generator.parts
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import generator.rhythm
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import generator.score
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FINAL_SECTION_INDEX = 6
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def arrange_document(document: dict, part_type: str, *, rhythms: generator.rhythm.Library) -> dict:
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document = generator.parts.prepare_document(document)
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plans = plan_arrangement(document, rhythms) if part_type != 'vocal' else {}
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return _arrange_document(document, part_type, plans)
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def section_source(source: list[dict], final: bool) -> list[dict]:
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result = copy.deepcopy(source)
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for measure in result:
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measure['harmonies'] = [h for h in measure['harmonies'] if not final or not h.get('chord_optional')]
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for chord in measure['harmonies']:
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chord.pop('chord_optional', None)
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return result
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def plan_arrangement(document: dict, rhythms: generator.rhythm.Library) -> dict[int, generator.accompaniment.Plan]:
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source = generator.score.source_staff(document)['measures']
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result = {}
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for section in generator.arrange.form.full_arrangement_sections(source, 'acoustic'):
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if section.role == 'slash':
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continue
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measures = section_source(source, section.section_index == FINAL_SECTION_INDEX)
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previous = generator.accompaniment.carried_chords(measures)
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start = section.source_measure_index
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result[section.section_index] = generator.accompaniment.plan_section(measures[start:start + section.measure_count], rhythms, initial=previous[start], electric=section.section_index in (1, 5, 6))
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return result
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def _arrange_document(document: dict, part_type: str, plans: dict[int, generator.accompaniment.Plan]) -> dict:
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if part_type not in generator.parts.PART_TYPES:
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raise ValueError(f'unknown arrangement part: {part_type}')
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staff = generator.score.source_staff(document)
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source = staff['measures']
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sections = generator.arrange.form.full_arrangement_sections(source, part_type)
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output, tuplets, octave_shifts = [], [], []
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absolute = fractions.Fraction()
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source_starts = []
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source_time = fractions.Fraction()
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for m in source:
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source_starts.append(source_time)
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source_time += generator.model.fraction(m['duration'])
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for section in sections:
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section_measures = section_source(source, section.section_index == FINAL_SECTION_INDEX)
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previous = generator.accompaniment.carried_chords(section_measures)
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segment = []
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for si in range(section.source_measure_index, section.source_measure_index + section.measure_count):
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m = section_measures[si]
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rhythm = None
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if section.role == 'accompaniment':
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plan = plans[section.section_index]
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rhythm = (plan.acoustic if part_type == 'acoustic' else plan.electric)[len(segment)]
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result = generator.parts.build_measure(m, f'measure-{len(output) + len(segment) + 1}', section.role, part_type, previous[si], section.label if not segment else '', rhythm)
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segment.append(result)
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identity_segment = segment
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segment_length = sum((generator.model.fraction(m['duration']) for m in segment), fractions.Fraction())
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if section.role in ('vocal', 'melody'):
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start = source_starts[section.source_measure_index]
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for shift in staff.get('octave_shifts', []):
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low, high = max(start, generator.model.fraction(shift['start'])), min(start + segment_length, generator.model.fraction(shift['end']))
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if low < high:
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octave_shifts.append({**shift, 'id': f'section-{section.section_index}-{shift["id"]}', 'start': generator.model.rational(absolute + low - start), 'end': generator.model.rational(absolute + high - start)})
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if part_type == 'vocal' and section.section_index in (1, 5) and section.source_measure_index == 1 and source[0].get('implicit') and output:
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pickup = generator.parts.build_measure(source[0], source[0]['id'], 'vocal', part_type, None)
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destination = output[-1]
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pad = generator.model.fraction(destination['duration']) - generator.model.fraction(pickup['duration'])
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if pad < 0:
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raise ValueError('pickup is longer than the preceding arrangement measure')
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voices = generator.score.copy_source_voices(pickup, strip_lyrics=False)
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for voice in voices:
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for n in voice['notes']:
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n['onset'] = generator.model.rational(generator.model.fraction(n['onset']) + pad)
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if pad:
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voice['notes'].insert(0, generator.model.make_event(f'pickup-rest-{voice["id"]}', fractions.Fraction(), pad, 'rest') | {'voice': voice['id']})
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destination['voices'] = voices
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identity_segment = [destination, *segment]
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if pickup['harmonies']:
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destination['harmonies'] = [h for h in destination['harmonies'] if generator.model.fraction(h['onset']) < pad]
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for h in pickup['harmonies']:
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h['onset'] = generator.model.rational(generator.model.fraction(h['onset']) + pad)
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destination['harmonies'].append(h)
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state = {k: copy.deepcopy(pickup[k]) for k in ('key', 'clef', 'meter', 'transpose')}
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if pad:
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destination['attributes'].append({'onset': generator.model.rational(pad), **state})
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else:
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destination.update(state)
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destination['key_signature'] = generator.model.key_label(state['key'])
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destination['time_signature'] = generator.model.meter_label(state['meter'])
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for change in pickup.get('attributes', []):
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destination['attributes'].append({**change, 'onset': generator.model.rational(generator.model.fraction(change['onset']) + pad)})
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for shift in staff.get('octave_shifts', []):
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low, high = generator.model.fraction(shift['start']), min(generator.model.fraction(pickup['duration']), generator.model.fraction(shift['end']))
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if low < high:
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offset = absolute - generator.model.fraction(pickup['duration'])
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octave_shifts.append({**shift, 'id': f'pickup-{section.section_index}-{shift["id"]}', 'start': generator.model.rational(offset + low), 'end': generator.model.rational(offset + high)})
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tuplets.extend(generator.score.reidentify(identity_segment, staff.get('tuplets', [])))
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output.extend(segment)
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absolute += segment_length
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result = generator.score.make_arranged_document(document, staff, staff_id='staff-arranged-' + part_type, staff_name=part_type.capitalize(), role='vocal' if part_type == 'vocal' else 'guitar', arrangement_part_type=part_type, measures=output, tuplets=tuplets, octave_shifts=octave_shifts)
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result['metadata'].setdefault('tempo', 124)
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if part_type != 'vocal':
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generator.guitar.place_guitar(result)
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if generator.accompaniment.connect_continuations(result):
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generator.guitar.place_guitar(result)
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return result
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def generate_performance_scores(source_dir: pathlib.Path, output_dir: pathlib.Path, *, rhythms: generator.rhythm.Library) -> int:
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count = 0
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for path in generator.parts.source_paths(source_dir):
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try:
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document = generator.parts.prepare_document(generator.musicxml.load_musicxml(path))
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plans = plan_arrangement(document, rhythms)
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except ValueError as error:
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raise ValueError(f'{path}: {error}') from error
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for part in generator.parts.PART_TYPES:
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try:
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generator.score.write_json(output_dir / f'{generator.score.slugify(path.stem)}-{part}.json', _arrange_document(document, part, plans))
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except ValueError as error:
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raise ValueError(f'{path}, part {part}: {error}') from error
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count += 1
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return count
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