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# Songwrite
# Copyright (C) 2001-2002 Jean-Baptiste LAMY
#
# This program is free software. See README or LICENSE for the license terms.
PITCHS = {
"C" : 0,
"D" : 2,
"E" : 4,
"F" : 5,
"G" : 7,
"A" : 9,
"B" : 11,
}
class MelodyNotePlacer:
def __init__(self):
self.pos = 1.0
def __call__(self, note):
if not note.time: note.time = self.pos
self.pos = note.time + note.duration
class ChordNotePlacer:
def __init__(self):
self.pos = 1.0
def __call__(self, note):
if not note.time: note.time = self.pos
else: self.pos = note.time
class ComplexNotePlacer:
def __init__(self, follow):
self.pos = 1.0
try: self.offset = float(follow)
except:
a, b = follow.split("/")
self.offset = a / b
def __call__(self, note):
if not note.time: note.time = self.pos
self.pos = note.time + note.duration + self.offset
class Parser:
def __init__(self):
self.pitch = 0
self.octavo = 48
self.duration = 1.0
self.volume = 64
self.parsers = {
"pitch" : self.parse_pitch,
"duration" : self.parse_duration,
"start" : self.parse_start,
}
def parse_pitch(self, attr, pitch):
try: self.cur_note.value = int(pitch)
except:
if ":" in pitch:
pitch, octavo = pitch.split(":")
self.octavo = octavo * 12
self.pitch = PITCHS[pitch[0]]
if len(pitch) > 1:
if pitch[1] == "#": self.pitch += 1
elif pitch[1] == "b": self.pitch -= 1
self.cur_note.value = self.pitch + self.octavo
def parse_duration(self, attr, duration):
try: self.cur_note.duration = float(duration)
except:
a, b = duration.split("/")
self.cur_note.duration = a / b
def parse_duration(self, attr, start):
self.cur_note.time = float(start)
def parse_other(self, attr, value):
setattr(self.cur_note, attr, value)
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