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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 | |