'longa': -2,
'long': -2}.get (dur, 0)
+def interpret_alter_element (alter_elm):
+ alter = 0
+ if alter_elm:
+ val = eval(alter_elm.get_text ())
+ if type (val) in (int, float):
+ alter = val
+ return alter
class Xml_node:
def get_alteration (self):
ch = self.get_maybe_exist_typed_child (get_class (u'alter'))
- alter = 0
- if ch:
- alter = int (ch.get_text ().strip ())
- return alter
+ return interpret_alter_element (ch)
class Unpitched (Music_xml_node):
def get_step (self):
Measure_element.__init__ (self)
self._dict = {}
self._original_tag = None
+ self._time_signature_cache = None
def is_first (self):
cn = self._parent.get_typed_children (self.__class__)
def get_named_attribute (self, name):
return self._dict.get (name)
+
+ def single_time_sig_to_fraction (self, sig):
+ if len (sig) < 2:
+ return 0
+ n = 0
+ for i in sig[0:-1]:
+ n += i
+ return Rational (n, sig[-1])
def get_measure_length (self):
- (n,d) = self.get_time_signature ()
- return Rational (n,d)
+ sig = self.get_time_signature ()
+ if not sig or len (sig) == 0:
+ return 1
+ if isinstance (sig[0], list):
+ # Complex compound time signature
+ l = 0
+ for i in sig:
+ l += self.single_time_sig_to_fraction (i)
+ return l
+ else:
+ # Simple (maybe compound) time signature of the form (beat, ..., type)
+ return self.single_time_sig_to_fraction (sig)
+ return 0
def get_time_signature (self):
- "return time sig as a (beat, beat-type) tuple"
+ "Return time sig as a (beat, beat-type) tuple. For compound signatures,"
+ "return either (beat, beat,..., beat-type) or ((beat,..., type), "
+ "(beat,..., type), ...)."
+ if self._time_signature_cache:
+ return self._time_signature_cache
try:
mxl = self.get_named_attribute ('time')
- if mxl:
- beats = mxl.get_maybe_exist_named_child ('beats')
- type = mxl.get_maybe_exist_named_child ('beat-type')
- return (int (beats.get_text ()),
- int (type.get_text ()))
- else:
+ if not mxl:
+ return None
+
+ if mxl.get_maybe_exist_named_child ('senza-misura'):
+ # TODO: Handle pieces without a time signature!
+ error (_ ("Senza-misura time signatures are not yet supported!"))
return (4, 4)
- except KeyError:
- error (_ ("requested time signature, but time sig is unknown"))
+ else:
+ signature = []
+ current_sig = []
+ for i in mxl.get_all_children ():
+ if isinstance (i, Beats):
+ beats = string.split (i.get_text ().strip (), "+")
+ current_sig = [int (j) for j in beats]
+ elif isinstance (i, BeatType):
+ current_sig.append (int (i.get_text ()))
+ signature.append (current_sig)
+ current_sig = []
+ if isinstance (signature[0], list) and len (signature) == 1:
+ signature = signature[0]
+ self._time_signature_cache = signature
+ return signature
+ except (KeyError, ValueError):
+ self.message (_ ("Unable to interpret time signature! Falling back to 4/4."))
return (4, 4)
# returns clef information in the form ("cleftype", position, octave-shift)
return clefinfo
def get_key_signature (self):
- "return (fifths, mode) tuple"
+ "return (fifths, mode) tuple if the key signatures is given as "
+ "major/minor in the Circle of fifths. Otherwise return an alterations"
+ "list of the form [[step,alter<,octave>], [step,alter<,octave>], ...], "
+ "where the octave values are optional."
key = self.get_named_attribute ('key')
- mode_node = key.get_maybe_exist_named_child ('mode')
- mode = None
- if mode_node:
- mode = mode_node.get_text ()
- if not mode or mode == '':
- mode = 'major'
-
- fifths = int (key.get_maybe_exist_named_child ('fifths').get_text ())
- return (fifths, mode)
-
+ if not key:
+ return None
+ fifths_elm = key.get_maybe_exist_named_child ('fifths')
+ if fifths_elm:
+ mode_node = key.get_maybe_exist_named_child ('mode')
+ mode = None
+ if mode_node:
+ mode = mode_node.get_text ()
+ if not mode or mode == '':
+ mode = 'major'
+ fifths = int (fifths_elm.get_text ())
+ # TODO: Shall we try to convert the key-octave and the cancel, too?
+ return (fifths, mode)
+ else:
+ alterations = []
+ current_step = 0
+ for i in key.get_all_children ():
+ if isinstance (i, KeyStep):
+ current_step = int (i.get_text ())
+ elif isinstance (i, KeyAlter):
+ alterations.append ([current_step, interpret_alter_element (i)])
+ elif isinstance (i, KeyOctave):
+ nr = -1
+ if hasattr (i, 'number'):
+ nr = int (i.number)
+ if (nr > 0) and (nr <= len (alterations)):
+ # MusicXML Octave 4 is middle C -> shift to 0
+ alterations[nr-1].append (int (i.get_text ())-4)
+ else:
+ i.message (_ ("Key alteration octave given for a "
+ "non-existing alteration nr. %s, available numbers: %s!") % (nr, len(alterations)))
+ return alterations
+
def get_transposition (self):
return self.get_named_attribute ('transpose')
-
+
+class KeyAlter (Music_xml_node):
+ pass
+class KeyStep (Music_xml_node):
+ pass
+class KeyOctave (Music_xml_node):
+ pass
class Barline (Measure_element):
return (text == "begin") or (text == "middle")
class Elision (Music_xml_node):
pass
+class Extend (Music_xml_node):
+ pass
class Text (Music_xml_node):
pass
class Bend (Music_xml_node):
def bend_alter (self):
alter = self.get_maybe_exist_named_child ('bend-alter')
- if alter:
- return alter.get_text()
- else:
- return 0
+ return interpret_alter_element (alter)
class Words (Music_xml_node):
pass
return ch.get_text ().strip ()
def get_alteration (self):
ch = self.get_maybe_exist_typed_child (get_class (self.alter_class_name ()))
- alter = 0
- if ch:
- alter = int (ch.get_text ().strip ())
- return alter
+ return interpret_alter_element (ch)
class Root (ChordPitch):
pass
return value
def get_alter (self):
ch = self.get_maybe_exist_typed_child (get_class (u'degree-alter'))
- value = 0
- if ch:
- value = int (ch.get_text ().strip ())
- return value
+ return interpret_alter_element (ch)
class Frame (Music_xml_node):
class FiguredBass (Music_xml_node):
pass
+class Beats (Music_xml_node):
+ pass
+
+class BeatType (Music_xml_node):
+ pass
+
class BeatUnit (Music_xml_node):
pass
'bar-style': BarStyle,
'bass': Bass,
'beam' : Beam,
+ 'beats': Beats,
+ 'beat-type': BeatType,
'beat-unit': BeatUnit,
'beat-unit-dot': BeatUnitDot,
'bend' : Bend,
'direction-type': DirType,
'duration': Duration,
'elision': Elision,
+ 'extend': Extend,
'frame': Frame,
'frame-note': Frame_Note,
'figured-bass': FiguredBass,
'grace': Grace,
'harmony': Harmony,
'identification': Identification,
+ 'key-alter': KeyAlter,
+ 'key-octave': KeyOctave,
+ 'key-step': KeyStep,
'lyric': Lyric,
'measure': Measure,
'notations': Notations,
projects / lilypond.git / blobdiff