def update(self, streamObj):
r'''
Given a Stream object, update attributes with stored objects.
'''
from music21 import key
from music21 import meter
from music21 import tempo
environLocal.printDebug(['RichMetadata: update(): start'])
flat = streamObj.flat.sorted
self.keySignatureFirst = None
self.keySignatures = []
self.tempoFirst = None
self.tempos = []
self.timeSignatureFirst = None
self.timeSignatures = []
# We combine element searching into a single loop to prevent
# multiple traversals of the flattened stream.
for element in flat:
if isinstance(element, meter.TimeSignature):
ratioString = element.ratioString
if ratioString not in self.timeSignatures:
self.timeSignatures.append(ratioString)
elif isinstance(element, key.KeySignature):
keySignatureString = str(element)
if keySignatureString not in self.keySignatures:
self.keySignatures.append(keySignatureString)
elif isinstance(element, tempo.TempoIndication):
tempoIndicationString = str(element)
if tempoIndicationString not in self.tempos:
self.tempos.append(tempoIndicationString)
if len(self.timeSignatures):
self.timeSignatureFirst = self.timeSignatures[0]
if len(self.keySignatures):
self.keySignatureFirst = self.keySignatures[0]
if len(self.tempos):
self.tempoFirst = self.tempos[0]
# for element in flat:
# pitches = ()
# if isinstance(element, note.Note):
# pitches = (element.pitch,)
# elif isinstance(element, chord.Chord):
# pitches = element.pitches
# for pitch in pitches:
# if self.pitchHighest is None:
# self.pitchHighest = pitch
# if self.pitchLowest is None:
# self.pitchLowest = pitch
# if pitch.ps < self.pitchLowest.ps:
# self.pitchLowest = pitch
# elif self.pitchHighest.ps < pitch.ps:
# self.pitchHighest = pitch
# self.pitchLowest = str(self.pitchLowest)
# self.pitchHighest = str(self.pitchHighest)
self.noteCount = len(flat.notesAndRests)
self.quarterLength = flat.highestTime
# commenting out temporarily due to memory error
# with corpus/beethoven/opus132.xml
# # must be a method-level import
# environLocal.printDebug(
# ['RichMetadata: update(): calling discrete.Ambitus(streamObj)'])
#
from music21.analysis import discrete
self.ambitus = None
self.pitchHighest = None
self.pitchLowest = None
analysisObject = discrete.Ambitus(streamObj)
psRange = analysisObject.getPitchSpan(streamObj)
if psRange is not None: # may be none if no pitches are stored
# presently, these are numbers; convert to pitches later
self.pitchLowest = str(psRange[0])
self.pitchHighest = str(psRange[1])
self.ambitus = analysisObject.getSolution(streamObj)
def update(self, streamObj):
r'''
Given a Stream object, update attributes with stored objects.
>>> rmd = metadata.RichMetadata()
>>> rmd.keySignatureFirst is None
True
>>> rmd.sourcePath
''
>>> b = corpus.parse('bwv66.6')
>>> rmd.update(b)
>>> rmd.keySignatureFirst
3
>>> rmd.sourcePath
'bach/bwv66.6.mxl'
>>> rmd.numberOfParts
4
'''
from music21 import key
from music21 import meter
from music21 import tempo
environLocal.printDebug(['RichMetadata: update(): start'])
flat = streamObj.flat.sorted
self.numberOfParts = len(streamObj.parts)
self.keySignatureFirst = None
self.keySignatures = []
self.tempoFirst = None
self.tempos = []
self.timeSignatureFirst = None
self.timeSignatures = []
self.sourcePath = self.getSourcePath(streamObj)
# We combine element searching into a single loop to prevent
# multiple traversals of the flattened stream.
for element in flat:
if isinstance(element, meter.TimeSignature):
ratioString = element.ratioString
if ratioString not in self.timeSignatures:
self.timeSignatures.append(ratioString)
elif isinstance(element, key.KeySignature):
if element.sharps not in self.keySignatures:
self.keySignatures.append(element.sharps)
elif isinstance(element, tempo.TempoIndication):
tempoIndicationString = str(element)
if tempoIndicationString not in self.tempos:
self.tempos.append(tempoIndicationString)
if self.timeSignatures:
self.timeSignatureFirst = self.timeSignatures[0]
if self.keySignatures:
self.keySignatureFirst = self.keySignatures[0]
if self.tempos:
self.tempoFirst = self.tempos[0]
# for element in flat:
# pitches = ()
# if isinstance(element, note.Note):
# pitches = (element.pitch,)
# elif isinstance(element, chord.Chord):
# pitches = element.pitches
# for pitch in pitches:
# if self.pitchHighest is None:
# self.pitchHighest = pitch
# if self.pitchLowest is None:
# self.pitchLowest = pitch
# if pitch.ps < self.pitchLowest.ps:
# self.pitchLowest = pitch
# elif self.pitchHighest.ps < pitch.ps:
# self.pitchHighest = pitch
# self.pitchLowest = str(self.pitchLowest)
# self.pitchHighest = str(self.pitchHighest)
self.noteCount = len(flat.notesAndRests)
self.quarterLength = flat.highestTime
# commenting out temporarily due to memory error
# with corpus/beethoven/opus132.xml
# # must be a method-level import
# environLocal.printDebug(
# ['RichMetadata: update(): calling discrete.Ambitus(streamObj)'])
#
from music21.analysis import discrete
self.ambitus = None
self.pitchHighest = None
self.pitchLowest = None
analysisObject = discrete.Ambitus(streamObj)
psRange = analysisObject.getPitchSpan(streamObj)
if psRange is not None: # may be none if no pitches are stored
# presently, these are numbers; convert to pitches later
self.pitchLowest = psRange[0].nameWithOctave
self.pitchHighest = psRange[1].nameWithOctave
ambitusInterval = analysisObject.getSolution(streamObj)
self.ambitus = AmbitusShort(
semitones=ambitusInterval.semitones,
diatonic=ambitusInterval.diatonic.simpleName,
pitchLowest=self.pitchLowest,
pitchHighest=self.pitchHighest,
)