khodowany
59 lines
2.0 KiB
Python
59 lines
2.0 KiB
Python
from __future__ import annotations
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import dataclasses
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import typing
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import generator.score
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@dataclasses.dataclass(frozen=True)
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class ArrangementSection:
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label: str
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source_measure_index: int
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measure_count: int
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section_index: int
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role: typing.Literal["accompaniment", "melody", "vocal", "rest", "slash"]
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def phrase_aware_edge_measure_count(body_measure_count: int) -> int:
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if body_measure_count >= 8:
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return 8
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if body_measure_count >= 4:
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return 4
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return body_measure_count
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def section_role(part_type: str, section_index: int) -> typing.Literal["accompaniment", "melody", "vocal", "rest", "slash"]:
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if part_type == "acoustic":
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return "slash" if section_index == 3 else "accompaniment"
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if part_type == "electric":
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if section_index == 4:
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return "slash"
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if section_index == 2:
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return "melody"
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if section_index in {1, 3, 5, 6}:
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return "accompaniment"
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return "rest"
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return "vocal" if section_index in {1, 5, 6} else "rest"
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def full_arrangement_sections(measures: list[dict], part_type: str) -> list[ArrangementSection]:
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if not measures:
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return []
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body_start = generator.score.body_start_measure_index(measures)
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if body_start >= len(measures):
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return []
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body_measure_count = len(measures) - body_start
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edge_measure_count = phrase_aware_edge_measure_count(body_measure_count)
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edge_source_measure = body_start + body_measure_count - edge_measure_count
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specs = (
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("Rhythm Lead-in", edge_source_measure, edge_measure_count, 0),
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("Vocal Melody", body_start, body_measure_count, 1),
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("Guitar Melody", body_start, body_measure_count, 2),
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("Acoustic Solo", body_start, body_measure_count, 3),
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("Electric Solo", body_start, body_measure_count, 4),
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("Vocal Melody", body_start, body_measure_count, 5),
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("Ending", edge_source_measure, edge_measure_count, 6),
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)
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return [
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ArrangementSection(label=label, source_measure_index=start, measure_count=count, section_index=index, role=section_role(part_type, index))
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for label, start, count, index in specs
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if count > 0
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]
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