khodowany
124 lines
7.3 KiB
Python
124 lines
7.3 KiB
Python
from __future__ import annotations
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import copy
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import fractions
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import generator.accompaniment
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import generator.acoustic
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import generator.acoustic_voicing
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import generator.arrange.ending
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import generator.arrange.form
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import generator.arrange.pickup
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import generator.comping
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import generator.electric
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import generator.fretboard
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import generator.guitar
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import generator.melody
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import generator.model
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import generator.parts
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import generator.score
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import generator.vocabulary
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FINAL_SECTION_INDEX = 5
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def arrange_document(document: dict, part_type: str, *, composition=None) -> dict:
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"""Canonical source-only template; solos are inserted by production roles."""
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composition = composition or generator.vocabulary.CompositionContext.create(generator.vocabulary.load(), part_type + '_accompaniment')
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document = generator.parts.prepare_document(document)
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backing = generator.comping.Canonical(document, part_type, 'canonical', composition=composition) if part_type != 'vocal' else None
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return _arrange_document(document, part_type, accompaniment=backing, composition=composition)
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def section_source(source: list[dict], section, next_section=None) -> 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 section.section_index != FINAL_SECTION_INDEX 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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if generator.arrange.pickup.enters(next_section, source):
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destination = result[section.source_measure_index + section.measure_count - 1]
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generator.arrange.pickup.harmonies(destination, result[0])
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return result
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def _arrange_document(document: dict, part_type: str, plan=None, *, owned=None, accompaniment=None, composition=None) -> dict:
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composition = composition or generator.vocabulary.current()
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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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plan = plan or generator.arrange.form.FormPlan.read(document, part_type)
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sections = plan.sections
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output, tuplets, octave_shifts, voicing_origins = [], [], [], []
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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 index, section in enumerate(sections):
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role = section.role if owned is None or section.role in owned else 'rest'
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section_measures = section_source(source, section, sections[index + 1] if index + 1 < len(sections) else None)
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previous = generator.accompaniment.carried_chords(section_measures)
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segment = []
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stop = plan.stops[index]
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next_section = sections[index + 1] if index + 1 < len(sections) else None
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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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if role == 'accompaniment' and accompaniment is not None:
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result = accompaniment(m, previous[si], si, sources=section_measures, bounds=(section.source_measure_index, section.source_measure_index + section.measure_count), stop=stop)
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result['id'] = f'measure_{len(output) + len(segment) + 1}'
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result['section_label'] = section.label if not segment else ''
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else:
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result = generator.parts.build_measure(m, f'measure_{len(output) + len(segment) + 1}', role, part_type, previous[si], section.label if not segment else '')
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segment.append(result)
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if part_type == 'electric' and section.role in ('melody', 'accompaniment'):
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voicing_origins.append(generator.electric.MeasureOrigin(source_starts[si], section.role, result))
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segment_length = sum((generator.model.fraction(m['duration']) for m in segment), fractions.Fraction())
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if 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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pickup = None
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if role in ('vocal', 'melody') and generator.arrange.pickup.enters(section, source) and output:
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pickup = generator.parts.build_measure(source[0], f'pickup_{section.section_index}', section.role, part_type, None)
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tuplets.extend(generator.score.reidentify(([pickup] if pickup else []) + segment, staff.get('tuplets', [])))
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if pickup:
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destination = output[-1]
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pad = generator.arrange.pickup.offset(destination, pickup)
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onset = generator.arrange.pickup.splice(destination, pickup)
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if part_type == 'electric':
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voicing_origins = [generator.electric.MeasureOrigin(o.onset, o.role, o.measure, o.start, onset if o.measure is destination else o.end) for o in voicing_origins]
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voicing_origins.append(generator.electric.MeasureOrigin(-pad, 'melody', destination, onset))
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for shift in staff.get('octave_shifts', []):
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low, high = max(onset - pad, 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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output.extend(segment)
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absolute += segment_length
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if sections and sections[-1].section_index == FINAL_SECTION_INDEX:
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generator.arrange.ending.append(source, output, part_type,
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sounding=part_type != 'vocal' and (owned is None or 'accompaniment' in owned),
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center=composition.role(part_type + '_accompaniment').get('center', 55), composition=composition)
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tuplets = generator.arrange.pickup.retain_links(output, tuplets)
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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 == 'acoustic':
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if accompaniment is None and (owned is None or 'accompaniment' in owned):
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generator.acoustic.prepare(result)
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generator.acoustic_voicing.place(result)
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generator.acoustic.validate_comping(result)
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generator.acoustic.combine(result)
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elif part_type == 'electric' and (owned is None or 'melody' in owned):
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generator.melody.harmonize(result)
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generator.guitar.place_guitar(result, composition=composition)
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if generator.accompaniment.connect_continuations(result):
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generator.guitar.place_guitar(result, composition=composition)
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# Source labels identify the head while arranging; published labels identify
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# the complete performance, including its lead-in and repeated choruses.
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for number, measure in enumerate(output, 1):
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measure['number'] = str(number)
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generator.fretboard.validate_document(result)
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return result
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