khodowany
@@ -0,0 +1,562 @@
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from __future__ import annotations
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import copy
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from fractions import Fraction
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from pathlib import Path
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from defusedxml import ElementTree as XML
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from generator import harmony
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from generator.model import (
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SCHEMA_VERSION, TYPE_LENGTHS, fraction, key_from_fifths, key_label,
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meter_label, meter_length, pitch_number, rational, validate_document,
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written_for, written_length,
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)
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from generator.styles import canonical_style
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class MusicXMLError(ValueError):
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pass
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# Ignoring a container never authorizes ignoring its musical descendants.
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LAYOUT = {'default-x', 'default-y', 'relative-x', 'relative-y', 'color', 'font-family', 'font-size', 'font-style', 'font-weight', 'halign', 'valign', 'justify', 'placement', 'id'}
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IGNORED_TOP = {'defaults', 'credit', 'work', 'movement-number', 'movement-title', 'identification', 'part-list'}
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class Importer:
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def __init__(self, path: Path) -> None:
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self.path = path
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self.location = str(path)
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self.divisions = Fraction(1)
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self.key = key_from_fifths(0)
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self.meter = {'groups':[{'beats':[4], 'unit':4}], 'symbol':'normal'}
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self.clef = {'sign':'G', 'line':2, 'octave_change':0}
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self.transpose = {'diatonic':0, 'chromatic':0, 'octave_change':0}
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self.sequence = 0
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self.tuplet_sequence = 0
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self.active_tuplets: dict[str, dict] = {}
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self.tuplets: list[dict] = []
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self.open_ties: dict[int, dict] = {}
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self.open_octaves: dict[str, dict] = {}
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self.octaves: list[dict] = []
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self.voice_id = None
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self.lyric_number = None
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self.absolute = Fraction()
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self.tremolo_start = None
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def fail(self, text: str):
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raise MusicXMLError(f'{self.location}: {text}')
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def children(self, node, allowed: set[str]) -> None:
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for item in node:
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if item.tag not in allowed:
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self.fail(f'unsupported musical element <{item.tag}> in <{node.tag}>')
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def attrs(self, node, allowed=()) -> None:
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for name in node.attrib:
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if name not in LAYOUT and name not in allowed:
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self.fail(f'unsupported {node.tag} attribute {name!r}')
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def number(self, value: str | None, *, integer: bool = False, positive: bool = False) -> Fraction | int:
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try:
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result = Fraction(value or '')
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if integer and result.denominator != 1 or positive and result <= 0:
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raise ValueError()
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rational(result)
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return int(result) if integer else result
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except (ValueError, ZeroDivisionError, OverflowError):
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self.fail(f'invalid {"integer" if integer else "number"}: {value!r}')
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def offset(self, node, cursor: Fraction) -> Fraction:
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return cursor + self.number(node.findtext('offset', '0')) / self.divisions
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def identity(self, node) -> None:
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voice = node.findtext('voice', '1' if node.tag in ('note','forward') else self.voice_id)
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staff = node.findtext('staff', '1')
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if staff != '1':
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self.fail('multiple staves are not supported')
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if voice is None:
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return
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if self.voice_id is None:
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self.voice_id = voice
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if voice != self.voice_id:
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self.fail('multiple rhythmic voices are not supported')
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def attributes(self, node, onset: Fraction) -> dict:
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self.children(node, {'divisions', 'key', 'time', 'clef', 'staves', 'transpose', 'instruments'})
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result = {'onset':rational(onset)}
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for item in node:
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if item.get('number', '1') != '1':
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self.fail('attributes for multiple staves are not supported')
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if item.tag == 'divisions':
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self.divisions = self.number(item.text, positive=True)
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elif item.tag in ('staves', 'instruments'):
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if item.text != '1':
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self.fail(f'multiple {item.tag} are not supported')
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elif item.tag == 'key':
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self.attrs(item, {'number', 'print-object'})
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self.children(item, {'cancel', 'fifths', 'mode', 'key-step', 'key-alter', 'key-accidental', 'key-octave'})
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if item.find('fifths') is not None:
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self.key = key_from_fifths(self.number(item.findtext('fifths'), integer=True), item.findtext('mode', 'major'))
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else:
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self.key = {'fifths':0, 'mode':'none', 'tonic':None, 'alterations':[0]*7, 'custom':True}
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pending = None
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for field in item:
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if field.tag == 'key-step':
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pending = (field.text or '').lower()
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if pending not in 'cdefgab' or len(pending) != 1:
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self.fail('invalid custom key step')
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elif field.tag == 'key-alter':
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if pending is None:
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self.fail('key alteration without a step')
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self.key['alterations']['cdefgab'.index(pending)] = self.number(field.text, integer=True)
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pending = None
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elif field.tag in ('key-octave', 'key-accidental'):
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self.fail(f'<{field.tag}> requires unsupported custom key placement')
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if pending is not None:
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self.fail('custom key step without alteration')
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if item.find('cancel') is not None:
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self.key['cancel'] = self.number(item.findtext('cancel'), integer=True)
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result['key'] = copy.deepcopy(self.key)
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elif item.tag == 'time':
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self.attrs(item, {'number', 'symbol', 'separator', 'print-object'})
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self.children(item, {'beats', 'beat-type', 'senza-misura'})
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self.meter = {'groups':[], 'symbol':item.get('symbol', 'normal')}
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if self.meter['symbol'] not in ('normal', 'common', 'cut', 'single-number', 'note', 'dotted-note'):
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self.fail('unsupported meter symbol')
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if item.find('senza-misura') is not None:
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self.meter['unmetered'] = True
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else:
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pending = None
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for field in item:
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if field.tag == 'beats':
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if pending is not None:
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self.fail('beats without beat-type')
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pending = [self.number(v, integer=True, positive=True) for v in (field.text or '').split('+')]
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elif field.tag == 'beat-type':
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if not pending:
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self.fail('beat-type without beats')
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self.meter['groups'].append({'beats':pending, 'unit':self.number(field.text, integer=True, positive=True)})
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pending = None
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if pending is not None or not self.meter['groups']:
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self.fail('incomplete meter')
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result['meter'] = copy.deepcopy(self.meter)
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elif item.tag == 'clef':
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self.attrs(item, {'number', 'additional', 'size', 'after-barline', 'print-object'})
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self.children(item, {'sign', 'line', 'clef-octave-change'})
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sign = item.findtext('sign')
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if sign not in ('G','F','C'):
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self.fail(f'unsupported clef {sign!r}; only pitched G/F/C staves are supported')
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line = self.number(item.findtext('line', {'G':'2','F':'4','C':'3'}[sign]), integer=True)
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if not 1 <= line <= 5:
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self.fail('clef line must be between 1 and 5')
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self.clef = {'sign':sign, 'line':line, 'octave_change':self.number(item.findtext('clef-octave-change','0'), integer=True)}
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result['clef'] = copy.deepcopy(self.clef)
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elif item.tag == 'transpose':
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self.children(item, {'diatonic', 'chromatic', 'octave-change'})
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self.transpose = {key:self.number(item.findtext(tag, '0'), integer=True) for key,tag in (('diatonic','diatonic'),('chromatic','chromatic'),('octave_change','octave-change'))}
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if item.find('chromatic') is None:
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self.fail('instrument transposition requires chromatic semitones')
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if item.find('diatonic') is None:
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semitones = self.transpose['chromatic']
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magnitude = abs(semitones)
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self.transpose['diatonic'] = (1 if semitones >= 0 else -1) * (7*(magnitude//12)+(0,0,1,2,2,3,3,4,5,5,6,6)[magnitude%12])
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result['transpose'] = copy.deepcopy(self.transpose)
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return result
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def read_harmony(self, node, cursor: Fraction) -> dict:
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self.attrs(node, {'print-object', 'print-frame', 'type'})
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self.children(node, {'root', 'kind', 'degree', 'bass', 'inversion', 'offset', 'staff'})
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if len(node.findall('kind')) != 1 or len(node.findall('root')) > 1:
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self.fail('stacked harmonies require separate harmony events')
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self.identity(node)
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kind = node.find('kind')
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result = {'id':f'harmony-{self.sequence}-{cursor}', 'onset':rational(self.offset(node, cursor)), 'kind':kind.text, 'degrees':[]}
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self.attrs(kind, {'text', 'use-symbols', 'stack-degrees', 'parentheses-degrees', 'bracket-degrees'})
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if 'text' in kind.attrib:
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result['kind_text'] = kind.get('text')
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for tag in ('root','bass'):
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item = node.find(tag)
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if item is None:
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if tag == 'root' and kind.text != 'none':
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self.fail('pitched harmony requires a root')
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continue
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self.children(item, {tag+'-step', tag+'-alter'})
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step = item.findtext(tag+'-step','').lower()
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if len(step)!=1 or step not in 'cdefgab':
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self.fail('invalid harmony root/bass')
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result[tag] = {'letter':step, 'alter':self.number(item.findtext(tag+'-alter','0'), integer=True)}
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for degree in node.findall('degree'):
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self.children(degree, {'degree-value','degree-alter','degree-type'})
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value = self.number(degree.findtext('degree-value'), integer=True, positive=True)
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alteration = self.number(degree.findtext('degree-alter','0'), integer=True)
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operation = degree.findtext('degree-type')
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# MusicXML alterations are relative to the kind; additions use dominant intervals.
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if operation == 'alter':
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alteration += harmony.KINDS.get(result['kind'], {}).get(value, 0)
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elif operation == 'add' and (value-1)%7 == 6:
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alteration -= 1
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elif operation == 'subtract' and alteration:
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self.fail('cannot subtract a degree different from the one in the chord kind')
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result['degrees'].append({'value':value, 'alter':alteration, 'type':operation})
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chord_degrees = harmony.degrees(result)
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if 'kind_text' in result and result['kind'] != 'none':
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from generator.model import pitch_name
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label = pitch_name(result['root']) + result['kind_text']
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try:
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displayed = harmony.degrees(harmony.parse_symbol(label))
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except ValueError:
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self.fail(f'unmapped harmony display text {label!r}; use a standard chord kind/degree spelling')
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if displayed != chord_degrees:
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if displayed != harmony.KINDS[result['kind']]:
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self.fail(f'contradictory harmony text {label!r} and structured chord degrees')
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result.pop('kind_text')
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if node.find('inversion') is not None:
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inversion = self.number(node.findtext('inversion'), integer=True)
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result['inversion'] = inversion
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if not 0 <= inversion < len(chord_degrees):
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self.fail('invalid chord inversion')
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if inversion and not result.get('bass'):
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degree = sorted(chord_degrees)[inversion]
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root = result['root']
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letter_index = 'cdefgab'.index(root['letter']) + degree - 1
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bass_letter = 'cdefgab'[letter_index % 7]
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from generator.model import NATURAL
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target = NATURAL[root['letter']] + root['alter'] + harmony.degree_semitones(degree, chord_degrees[degree])
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result['bass'] = {'letter':bass_letter, 'alter':target - (12*(letter_index//7)+NATURAL[bass_letter])}
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result['symbol'] = harmony.symbol(result)
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return result
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def direction(self, node, cursor: Fraction, measure: dict, optional: list[Fraction]) -> None:
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self.attrs(node, {'print-object', 'directive'})
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self.children(node, {'direction-type','offset','staff','voice','sound'})
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onset = self.offset(node, cursor)
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for group in node.findall('direction-type'):
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self.children(group, {'words','octave-shift','rehearsal','metronome'})
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for item in group:
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if item.tag == 'words':
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value = ''.join(item.itertext()).strip()
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if value == 'vamp:optional-chord':
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optional.append(onset)
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elif value:
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self.fail(f'unsupported staff text {value!r}; only Vamp directives are accepted')
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elif item.tag == 'rehearsal':
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if onset != 0:
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self.fail('section labels must be at measure starts')
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measure['section_label'] = ''.join(item.itertext())
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elif item.tag == 'octave-shift':
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number, action = item.get('number','1'), item.get('type')
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size = self.number(item.get('size','8'), integer=True)
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if size not in (8,15,22):
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self.fail('octave shifts support 8, 15, or 22')
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position = rational(self.absolute + onset)
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if action in ('up','down'):
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if number in self.open_octaves:
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self.fail('duplicate octave-shift start')
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span = {'id':f'octave-{len(self.octaves)+1}', 'start':position, 'octaves':(size-1)//7 * (1 if action=='up' else -1)}
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self.open_octaves[number] = span
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self.octaves.append(span)
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elif action == 'stop':
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if number not in self.open_octaves:
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self.fail('octave-shift stop without start')
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self.open_octaves.pop(number)['end'] = position
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elif action != 'continue' or number not in self.open_octaves:
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self.fail('invalid octave-shift continuation')
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elif item.tag == 'metronome':
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self.children(item, {'beat-unit','beat-unit-dot','per-minute'})
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written = {'type':item.findtext('beat-unit'), 'dots':len(item.findall('beat-unit-dot'))}
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written_length(written)
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bpm = self.number(item.findtext('per-minute'), positive=True)
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measure.setdefault('tempos', []).append({'onset':rational(onset), 'written':written, 'bpm':rational(bpm)})
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sound = node.find('sound')
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if sound is not None:
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self.attrs(sound, {'tempo'})
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self.children(sound, set())
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if sound.get('tempo') and not any(fraction(t['onset'])==onset for t in measure.get('tempos', [])):
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measure.setdefault('tempos', []).append({'onset':rational(onset), 'written':{'type':'quarter','dots':0}, 'bpm':rational(self.number(sound.get('tempo'), positive=True))})
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def read_note(self, node, cursor: Fraction, previous: dict | None) -> tuple[dict, Fraction, bool]:
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self.attrs(node, {'print-object', 'print-dot', 'print-spacing', 'default-x', 'dynamics', 'end-dynamics'})
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if node.get('dynamics') or node.get('end-dynamics'):
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self.fail('note dynamics are not supported')
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self.children(node, {'pitch','rest','chord','duration','voice','type','dot','accidental','time-modification','stem','staff','beam','notations','lyric','tie','grace','cue','notehead'})
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for tag in ('pitch','rest','chord','duration','voice','type','accidental','time-modification','stem','staff','grace','cue','notehead'):
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if len(node.findall(tag)) > 1:
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self.fail(f'duplicate <{tag}> in <note>')
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if node.find('rest') is not None and node.find('pitch') is not None:
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self.fail('note cannot contain both pitch and rest')
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self.identity(node)
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||||
is_chord = node.find('chord') is not None
|
||||
grace = node.find('grace')
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duration = Fraction() if grace is not None else self.number(node.findtext('duration'), positive=True) / self.divisions
|
||||
onset = fraction(previous['onset']) if is_chord and previous else cursor
|
||||
if is_chord and (previous is None or previous['kind']!='note' or duration > fraction(previous['duration'])):
|
||||
self.fail('invalid chord tone or chord tone longer than its anchor')
|
||||
if is_chord and (grace is not None) != ('grace' in previous):
|
||||
self.fail('chord tones must share grace/regular timing')
|
||||
written = {'type':node.findtext('type'), 'dots':len(node.findall('dot'))}
|
||||
if written['type'] is None:
|
||||
written = {'type':'whole','dots':0} if node.find('rest') is not None and node.find('rest').get('measure')=='yes' else written_for(duration)
|
||||
written_length(written)
|
||||
modulation = node.find('time-modification')
|
||||
if modulation is not None:
|
||||
self.children(modulation, {'actual-notes','normal-notes','normal-type','normal-dot'})
|
||||
actual = self.number(modulation.findtext('actual-notes'), integer=True, positive=True)
|
||||
normal = self.number(modulation.findtext('normal-notes'), integer=True, positive=True)
|
||||
written['ratio'] = rational(Fraction(normal, actual))
|
||||
if modulation.find('normal-type') is not None:
|
||||
written['normal'] = {'type':modulation.findtext('normal-type'), 'dots':len(modulation.findall('normal-dot'))}
|
||||
written_length(written['normal'])
|
||||
elif modulation.findall('normal-dot'):
|
||||
self.fail('<normal-dot> requires <normal-type>')
|
||||
measure_rest = node.find('rest') is not None and node.find('rest').get('measure') == 'yes'
|
||||
if grace is None and not measure_rest:
|
||||
expected = written_length(written) * fraction(written.get('ratio', rational(1)))
|
||||
if duration != expected:
|
||||
self.fail(f'<note> duration {duration} disagrees with written duration/time-modification {expected}')
|
||||
self.sequence += 1
|
||||
note = {'id':f'note-{self.sequence}', 'kind':'rest' if node.find('rest') is not None else 'note', 'onset':rational(onset), 'duration':rational(duration), 'written':written, 'hidden':node.get('print-object')=='no', 'pitches':[]}
|
||||
if is_chord:
|
||||
note = previous
|
||||
if grace is not None:
|
||||
self.attrs(grace, {'slash','steal-time-previous','steal-time-following','make-time'})
|
||||
note['grace'] = {'slash':grace.get('slash')=='yes'}
|
||||
for name in ('steal-time-previous','steal-time-following','make-time'):
|
||||
if name in grace.attrib:
|
||||
note['grace'][name] = rational(self.number(grace.get(name), positive=True))
|
||||
if node.find('cue') is not None:
|
||||
note['cue'] = True
|
||||
if node.find('rest') is not None:
|
||||
self.children(node.find('rest'), {'display-step','display-octave'})
|
||||
if node.find('rest').get('measure') == 'yes':
|
||||
note['measure_rest'] = True
|
||||
if node.find('rest/display-step') is not None:
|
||||
note['rest_position'] = {'letter':node.findtext('rest/display-step').lower(), 'octave':self.number(node.findtext('rest/display-octave'), integer=True)}
|
||||
else:
|
||||
pitch_node = node.find('pitch')
|
||||
if pitch_node is None:
|
||||
self.fail('note has neither pitch nor rest')
|
||||
self.children(pitch_node, {'step','alter','octave'})
|
||||
p = {'id':f'{note["id"]}-p{len(note["pitches"])+1}', 'letter':pitch_node.findtext('step','').lower(), 'alter':self.number(pitch_node.findtext('alter','0'), integer=True), 'octave':self.number(pitch_node.findtext('octave'), integer=True), 'duration':rational(duration), 'written':written}
|
||||
value = pitch_number(p)
|
||||
p['_absolute'] = self.absolute + onset
|
||||
accidental = node.find('accidental')
|
||||
if accidental is not None:
|
||||
self.attrs(accidental, {'cautionary','editorial','parentheses','bracket','size','smufl'})
|
||||
allowed = {'natural':0,'sharp':1,'flat':-1,'double-sharp':2,'sharp-sharp':2,'flat-flat':-2,'triple-sharp':3,'triple-flat':-3,'natural-sharp':1,'natural-flat':-1}
|
||||
if accidental.text not in allowed or allowed[accidental.text] != p['alter']:
|
||||
self.fail('unsupported or contradictory accidental')
|
||||
p['accidental_display'] = {'name':accidental.text, 'parentheses':accidental.get('parentheses')=='yes' or accidental.get('cautionary')=='yes', 'bracket':accidental.get('bracket')=='yes'}
|
||||
ties = {t.get('type') for t in node.findall('tie')}
|
||||
notations = node.find('notations')
|
||||
if notations is not None:
|
||||
visual_ties = {t.get('type') for t in notations.findall('tied')}
|
||||
if 'continue' in visual_ties:
|
||||
visual_ties.remove('continue')
|
||||
visual_ties.update({'start','stop'})
|
||||
ties |= visual_ties
|
||||
if ties - {'start','stop'}:
|
||||
self.fail('unsupported tie notation')
|
||||
if 'stop' in ties:
|
||||
source = self.open_ties.pop(value, None)
|
||||
if source is None or source['_absolute'] + fraction(source['duration']) != p['_absolute']:
|
||||
self.fail('tie stop has no contiguous matching start')
|
||||
source['tie_to'], p['tie_from'] = p['id'], source['id']
|
||||
if 'start' in ties:
|
||||
if value in self.open_ties:
|
||||
self.fail('ambiguous duplicate tie at the same pitch')
|
||||
self.open_ties[value] = p
|
||||
note['pitches'].append(p)
|
||||
if not is_chord:
|
||||
if node.find('stem') is not None:
|
||||
stem = node.findtext('stem')
|
||||
if stem not in ('up','down','none','double'):
|
||||
self.fail('unsupported stem')
|
||||
note['stem'] = stem
|
||||
head = node.findtext('notehead')
|
||||
if head is not None:
|
||||
if head not in ('normal','slash'):
|
||||
self.fail(f'unsupported notehead: {head}')
|
||||
note['notehead'] = head
|
||||
beams = []
|
||||
for beam in node.findall('beam'):
|
||||
level = self.number(beam.get('number','1'), integer=True)
|
||||
if not 1 <= level <= 8 or beam.text not in ('begin','continue','end','forward hook','backward hook'):
|
||||
self.fail('invalid beam')
|
||||
beams.append({'level':level,'type':beam.text})
|
||||
if beams:
|
||||
note['beams'] = beams
|
||||
for lyric in node.findall('lyric'):
|
||||
self.children(lyric, {'syllabic','text','elision','extend','end-line','end-paragraph'})
|
||||
number = lyric.get('number', '1')
|
||||
if self.lyric_number is None:
|
||||
self.lyric_number = number
|
||||
if self.lyric_number != number or 'lyric' in note:
|
||||
self.fail('only one lyric verse is supported')
|
||||
pieces = []
|
||||
for item in lyric:
|
||||
if item.tag in ('text','elision'):
|
||||
pieces.append(item.text or (' ' if item.tag=='elision' else ''))
|
||||
syllabic = lyric.findtext('syllabic','single')
|
||||
if syllabic not in ('single','begin','middle','end'):
|
||||
self.fail('invalid lyric syllabification')
|
||||
note['lyric'] = ''.join(pieces) + ('-' if syllabic in ('begin','middle') else '')
|
||||
note['lyric_notation'] = {'text':''.join(pieces), 'syllabic':syllabic}
|
||||
if lyric.find('extend') is not None:
|
||||
note['lyric_notation']['extend'] = lyric.find('extend').get('type','start')
|
||||
stops = []
|
||||
for notations in node.findall('notations'):
|
||||
self.children(notations, {'tied','tuplet','ornaments'})
|
||||
for item in notations:
|
||||
if item.tag == 'tuplet' and not is_chord:
|
||||
number, action = item.get('number','1'), item.get('type')
|
||||
self.children(item, {'tuplet-actual','tuplet-normal'})
|
||||
if action == 'start':
|
||||
if number in self.active_tuplets:
|
||||
self.fail('duplicate tuplet start')
|
||||
self.tuplet_sequence += 1
|
||||
actual = item.findtext('tuplet-actual/tuplet-number', modulation.findtext('actual-notes') if modulation is not None else '')
|
||||
normal = item.findtext('tuplet-normal/tuplet-number', modulation.findtext('normal-notes') if modulation is not None else '')
|
||||
if self.active_tuplets and (item.find('tuplet-actual') is None or item.find('tuplet-normal') is None):
|
||||
self.fail('nested tuplets require explicit tuplet-actual and tuplet-normal numbers')
|
||||
span = {'id':f'tuplet-{self.tuplet_sequence}', 'start':note['id'], 'note_count':self.number(actual, integer=True, positive=True), 'space_count':self.number(normal, integer=True, positive=True), 'depth':len(self.active_tuplets), 'bracket':item.get('bracket','auto'), 'show_number':item.get('show-number','actual')}
|
||||
self.active_tuplets[number] = span
|
||||
self.tuplets.append(span)
|
||||
elif action == 'stop':
|
||||
stops.append(number)
|
||||
else:
|
||||
self.fail('invalid tuplet type')
|
||||
elif item.tag == 'ornaments':
|
||||
self.children(item, {'tremolo'})
|
||||
for tremolo in item:
|
||||
marks = self.number(tremolo.text, integer=True)
|
||||
if not 0 <= marks <= 8 or tremolo.get('type','single') == 'unmeasured':
|
||||
self.fail('only measured tremolos are supported')
|
||||
action = tremolo.get('type','single')
|
||||
note['tremolo'] = {'marks':marks, 'type':action}
|
||||
if action == 'start':
|
||||
if self.tremolo_start is not None:
|
||||
self.fail('nested tremolo')
|
||||
self.tremolo_start = note
|
||||
elif action == 'stop':
|
||||
if self.tremolo_start is None:
|
||||
self.fail('tremolo stop without start')
|
||||
note['tremolo']['partner'] = self.tremolo_start['id']
|
||||
self.tremolo_start['tremolo']['partner'] = note['id']
|
||||
self.tremolo_start = None
|
||||
elif action != 'single':
|
||||
self.fail('unsupported tremolo type')
|
||||
if not is_chord:
|
||||
note['tuplet_ids'] = [t['id'] for t in self.active_tuplets.values()]
|
||||
for number in stops:
|
||||
if number not in self.active_tuplets:
|
||||
self.fail('tuplet stop without start')
|
||||
self.active_tuplets.pop(number)['end'] = note['id']
|
||||
return note, cursor if is_chord else cursor + duration, is_chord
|
||||
|
||||
def read(self) -> dict:
|
||||
root = XML.parse(self.path, forbid_entities=True, forbid_external=True).getroot()
|
||||
if root.tag != 'score-partwise' or root.get('version') not in ('3.1','4.0'):
|
||||
self.fail('expected uncompressed score-partwise MusicXML 3.1 or 4.0')
|
||||
self.children(root, IGNORED_TOP | {'part'})
|
||||
parts = root.findall('part')
|
||||
definitions = root.findall('part-list/score-part')
|
||||
if len(parts) != 1 or len(definitions) != 1 or parts[0].get('id') != definitions[0].get('id'):
|
||||
self.fail('exactly one matching score part is required')
|
||||
fields = {}
|
||||
for item in root.findall('identification/miscellaneous/miscellaneous-field'):
|
||||
name = item.get('name','')
|
||||
if name.startswith('vamp:'):
|
||||
if name not in ('vamp:style','vamp:tonic') or name in fields:
|
||||
self.fail(f'unknown or duplicate Vamp property {name!r}')
|
||||
fields[name] = item.text or ''
|
||||
metadata = {'title':root.findtext('work/work-title') or root.findtext('movement-title') or self.path.stem, 'composer':' / '.join(c.text for c in root.findall('identification/creator') if c.get('type')=='composer' and c.text), 'style':canonical_style(fields.get('vamp:style'))}
|
||||
if 'vamp:tonic' in fields:
|
||||
from generator.model import parse_pitch_name
|
||||
metadata['transpose_origin'] = parse_pitch_name(fields['vamp:tonic'])
|
||||
measures = []
|
||||
self.children(parts[0], {'measure'})
|
||||
for index, bar in enumerate(parts[0]):
|
||||
self.location = f'{self.path}: part {parts[0].get("id")}, measure {bar.get("number",str(index+1))}'
|
||||
self.children(bar, {'attributes','note','direction','harmony','forward','backup','barline','print'})
|
||||
self.attrs(bar, {'number','implicit','non-controlling','width','text'})
|
||||
cursor = Fraction()
|
||||
events = []
|
||||
previous = None
|
||||
optional = []
|
||||
measure = {'id':f'measure-{index+1}', 'number':bar.get('number',str(index+1)), 'implicit':bar.get('implicit')=='yes', 'harmonies':[], 'attributes':[], 'key':copy.deepcopy(self.key), 'meter':copy.deepcopy(self.meter), 'clef':copy.deepcopy(self.clef), 'transpose':copy.deepcopy(self.transpose)}
|
||||
for item in bar:
|
||||
if item.tag == 'attributes':
|
||||
state = self.attributes(item, cursor)
|
||||
if cursor == 0:
|
||||
for k in ('key','meter','clef','transpose'):
|
||||
measure[k] = copy.deepcopy(getattr(self,k))
|
||||
elif len(state) > 1:
|
||||
measure['attributes'].append(state)
|
||||
elif item.tag == 'note':
|
||||
previous, cursor, is_chord = self.read_note(item, cursor, previous)
|
||||
if not is_chord:
|
||||
events.append(previous)
|
||||
elif item.tag == 'harmony':
|
||||
measure['harmonies'].append(self.read_harmony(item, cursor))
|
||||
elif item.tag == 'direction':
|
||||
self.direction(item, cursor, measure, optional)
|
||||
elif item.tag == 'backup':
|
||||
self.fail('backward timeline movement requires unsupported independent voices')
|
||||
elif item.tag == 'forward':
|
||||
self.children(item, {'duration','voice','staff'})
|
||||
self.identity(item)
|
||||
duration = self.number(item.findtext('duration'), positive=True)/self.divisions
|
||||
self.sequence += 1
|
||||
from generator.model import make_event
|
||||
events.append(make_event(f'spacer-{self.sequence}', cursor, duration, 'spacer'))
|
||||
cursor += duration
|
||||
previous = None
|
||||
elif item.tag == 'barline':
|
||||
self.children(item, {'bar-style'})
|
||||
style = item.findtext('bar-style','regular')
|
||||
if style not in ('regular','light-light','light-heavy','heavy-light','heavy-heavy','heavy','dashed','dotted','none','tick','short'):
|
||||
self.fail('unsupported barline')
|
||||
measure.setdefault('barlines', {})[item.get('location','right')] = style
|
||||
if not events or cursor <= 0:
|
||||
self.fail('empty or zero-duration measure')
|
||||
expected = meter_length(measure['meter'])
|
||||
meter_changed = any('meter' in a for a in measure['attributes'])
|
||||
if expected and cursor != expected and not measure['implicit'] and not meter_changed:
|
||||
self.fail(f'measure has {cursor} quarter notes, expected {expected}; mark a partial measure implicit')
|
||||
measure['duration'] = rational(cursor)
|
||||
measure['key_signature'], measure['time_signature'] = key_label(measure['key']), meter_label(measure['meter'])
|
||||
measure['voices'] = [{'id':'voice-source', 'notes':events}]
|
||||
measure['harmonies'].sort(key=lambda h:fraction(h['onset']))
|
||||
used = set()
|
||||
for onset in optional:
|
||||
matches = [h for h in measure['harmonies'] if fraction(h['onset'])==onset]
|
||||
if len(matches)!=1 or onset in used:
|
||||
self.fail('optional-chord marker must identify exactly one harmony and occur only once')
|
||||
matches[0]['chord_optional'] = True
|
||||
used.add(onset)
|
||||
measures.append(measure)
|
||||
self.absolute += cursor
|
||||
if self.open_ties or self.active_tuplets or self.open_octaves or self.tremolo_start:
|
||||
self.fail('unterminated tie, tuplet, octave shift, or tremolo')
|
||||
if not measures:
|
||||
self.fail('score has no measures')
|
||||
for measure in measures:
|
||||
for n in measure['voices'][0]['notes']:
|
||||
for p in n['pitches']:
|
||||
p.pop('_absolute', None)
|
||||
metadata.update({'key_signature':measures[0]['key_signature'], 'time_signature':measures[0]['time_signature'], 'key':copy.deepcopy(measures[0]['key'])})
|
||||
result = {'schema_version':SCHEMA_VERSION, 'metadata':metadata, 'staves':[{'id':'staff-source', 'name':definitions[0].findtext('part-name','Source'), 'role':'vocal', 'clef':copy.deepcopy(measures[0]['clef']), 'tuplets':self.tuplets, 'octave_shifts':self.octaves, 'measures':measures}]}
|
||||
validate_document(result)
|
||||
return result
|
||||
|
||||
|
||||
def load_musicxml(path: Path) -> dict:
|
||||
importer = Importer(Path(path))
|
||||
try:
|
||||
return importer.read()
|
||||
except MusicXMLError:
|
||||
raise
|
||||
except Exception as error:
|
||||
raise MusicXMLError(f'{importer.location}: {error}') from error
|
||||
Reference in New Issue
Block a user