khodowany
34 lines
1.8 KiB
Python
34 lines
1.8 KiB
Python
"""Complete generated rhythm groups, indexed once, independent of source rhythms."""
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from fractions import Fraction as F
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from generator import vocabulary
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from generator.solo import groups
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class Rhythms:
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def __init__(self, library, tempo):
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self.groups=[]; limits=vocabulary.data('roles')['difficulty']
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for item in vocabulary.data('solo')['groups']:
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difficulty=item.get('difficulty')
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if difficulty and tempo>limits[difficulty+'_max_bpm']:continue
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cursor=F();pattern=[]
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for value in item['values']:
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duration=F(value.removeprefix('r:'))
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if not value.startswith('r:'):pattern.append((cursor,cursor+duration))
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cursor+=duration
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self.groups.append((item['id'],tuple(pattern),cursor,tuple(item['purpose'])))
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for cell in vocabulary.rhythm_cells(tempo):
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# Imported authored cells remain whole. They are never sliced to fit.
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if groups.valid(cell.pattern):self.groups.append((cell.id,cell.pattern,cell.duration,('develop','answer') if cell.purpose=='answer' else ('arpeggio','scalar','develop','neighbor')))
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# Meter-indexed catalog representatives: file counts do not set style frequency.
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self.catalog={}
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for meter,items in library.snippets.items():
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representatives={}
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for item in items:
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for bar in item.bars:
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pattern=tuple((e.onset,e.onset+e.duration) for e in bar.events if e.sounding)
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if any(e.continuation for e in bar.events) or not pattern or not groups.valid(pattern):continue
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if any(b-a<F(1,2) for a,b in pattern):continue
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descriptor=(len(pattern),pattern[0][0]>0,any(a[1]<b[0] for a,b in zip(pattern,pattern[1:])),len(set(b-a for a,b in pattern)))
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representatives.setdefault(descriptor,(item.id,pattern,bar.length,('develop','answer')))
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self.catalog[meter]=tuple(representatives.values())
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self.cache={}
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