khodowany
68 lines
2.7 KiB
Python
68 lines
2.7 KiB
Python
from __future__ import annotations
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from pathlib import Path
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from generator.score import copy_source_voices, make_arranged_document, make_measure, reidentify, slugify, source_staff, write_json
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from generator.musicxml import load_musicxml
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from generator.practice.guitar import transpose_guitar_practice
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from generator.transposition import TARGET_KEYS
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def practice_document(document: dict) -> dict:
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staff = source_staff(document)
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source_measures = staff.get("measures")
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if not isinstance(source_measures, list):
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raise ValueError("practice source must contain measures")
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measures: list[dict] = []
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for index, measure in enumerate(source_measure for source_measure in source_measures if isinstance(source_measure, dict)):
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voices = copy_source_voices(measure, strip_lyrics=True)
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output_measure = make_measure(
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f"measure-{index + 1}",
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measure,
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[],
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section_label=str(measure.get("section_label", "")),
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)
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output_measure['voices'] = voices
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measures.append(output_measure)
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tuplets = reidentify(measures, staff.get('tuplets', []))
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result = make_arranged_document(
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document,
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staff,
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staff_id="staff-arranged-practice",
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staff_name="Practice",
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role="guitar",
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arrangement_part_type="practice",
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measures=measures,
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tuplets=tuplets,
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octave_shifts=staff.get('octave_shifts', []),
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)
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result['metadata'].setdefault('authored_key_signature', document['metadata']['key_signature'])
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return result
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def key_file_name(key: str) -> str:
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return slugify(key.replace("#", "sharp")) + ".json"
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def generate_key_variants(source_path: Path, output_dir: Path) -> int:
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base_document = practice_document(load_musicxml(source_path))
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count = 0
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for key in TARGET_KEYS:
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try:
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variant = transpose_guitar_practice(base_document, key)
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except ValueError as error:
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raise ValueError(f'{source_path}, target key {key}: {error}') from error
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write_json(output_dir / source_path.stem / key_file_name(key), variant)
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count += 1
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return count
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def generate_practice_scores(source_dir: Path, output_dir: Path) -> int:
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if not source_dir.is_dir():
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raise ValueError(f'practice source directory not found: {source_dir}')
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sources = sorted(source_dir.glob('*.xml'))
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for path in source_dir.rglob('*.xml'):
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parts = path.relative_to(source_dir).parts
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if len(parts) != 1 and (len(parts) != 2 or parts[0] != 'songs'):
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raise ValueError(f'{path}: practice sources belong directly under the data directory')
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for path in sources:
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if len(path.stem) != 3 or not path.stem.isascii() or not path.stem.isdecimal() or int(path.stem) == 0:
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raise ValueError(f'{path}: practice sources require a three-digit positive filename such as 001.xml')
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return sum(generate_key_variants(path, output_dir) for path in sources)
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