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# -*- coding: utf-8 -*-
#
# This file is part of LilyPond, the GNU music typesetter.
#
# Copyright (C) 2016--2020 John Gourlay <[email protected]>
#
# LilyPond is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# LilyPond is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
from fractions import Fraction
import lilylib as ly
import musicexp
def rational_to_lily_duration(rational_len):
d = musicexp.Duration()
d_log = {1: 0, 2: 1, 4: 2, 8: 3, 16: 4, 32: 5, 64: 6,
128: 7, 256: 8, 512: 9}.get(rational_len.denominator, -1)
# Duration of the form 1/2^n or 3/2^n can be converted to a simple lilypond duration
dots = {1: 0, 3: 1, 7: 2, 15: 3, 31: 4, 63: 5,
127: 6}.get(rational_len.numerator, -1)
if d_log >= dots >= 0:
# account for the dots!
d.duration_log = d_log - dots
d.dots = dots
elif d_log >= 0:
d.duration_log = d_log
d.factor = Fraction(rational_len.numerator)
else:
ly.warning(_("Encountered rational duration with denominator %s, "
"unable to convert to lilypond duration") %
rational_len.denominator)
# TODO: Test the above error message
return None
return d
def musicxml_step_to_lily(step):
if step:
return (ord(step) - ord('A') + 7 - 2) % 7
else:
return None
class Marker(musicexp.Music):
def __init__(self):
self.direction = 0
self.event = None
def print_ly(self, printer):
ly.warning(_("Encountered unprocessed marker %s\n") % self)
pass
def ly_expression(self):
return ""
class RepeatMarker(Marker):
def __init__(self):
Marker.__init__(self)
self.times = 0
class EndingMarker(Marker):
pass
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