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# This file is part of the Frescobaldi project, http://www.frescobaldi.org/
#
# Copyright (c) 2008, 2009, 2010 by Wilbert Berendsen
#
# This program 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 2
# of the License, or (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# See http://www.gnu.org/licenses/ for more information.
from __future__ import unicode_literals
"""
Code dealing with Key signatures
"""
##
# The dicts key2num and num2key translate a key signature name to
# the number of accidentals. (0 = C, 1 = G, -1 = F, etc.)
key2num = {
'ne': {
'fes':-8, 'ces':-7, 'ges':-6, 'des':-5, 'as':-4,
'aes':-4, 'es':-3, 'ees':-3, 'bes':-2, 'f':-1,
'c':0, 'g':1, 'd':2, 'a':3, 'e':4, 'b':5, 'fis':6, 'cis':7,
'gis':8, 'dis':9, 'ais':10, 'eis':11, 'bis':12
},
'en-short': {
'ff':-8, 'cf':-7, 'gf':-6, 'df':-5,
'af':-4, 'ef':-3, 'bf':-2, 'f':-1,
'c':0, 'g':1, 'd':2, 'a':3, 'e':4, 'b':5, 'fs':6, 'cs':7,
'gs':8, 'ds':9, 'as':10, 'es':11, 'bs':12
},
'en': {
'fflat':-8, 'cflat':-7, 'gflat':-6, 'dflat':-5,
'aflat':-4, 'eflat':-3, 'bflat':-2, 'f':-1,
'c':0, 'g':1, 'd':2, 'a':3, 'e':4, 'b':5, 'fsharp':6, 'csharp':7,
'gsharp':8, 'dsharp':9, 'asharp':10, 'esharp':11, 'bsharp':12
},
'de': {
'fes':-8, 'ces':-7, 'ges':-6, 'des':-5, 'as':-4,
'aes':-4, 'es':-3, 'ees':-3, 'b':-2, 'f':-1,
'c':0, 'g':1, 'd':2, 'a':3, 'e':4, 'h':5, 'fis':6, 'cis':7,
'gis':8, 'dis':9, 'ais':10, 'eis':11, 'his':12
},
'sv': {
'fess':-8, 'cess':-7, 'gess':-6, 'dess':-5, 'ass':-4,
'aess':-4, 'ess':-3, 'eess':-3, 'b':-2, 'f':-1,
'c':0, 'g':1, 'd':2, 'a':3, 'e':4, 'h':5, 'fiss':6, 'ciss':7,
'giss':8, 'diss':9, 'aiss':10, 'eiss':11, 'hiss':12
},
# no = (de|sv), su = de
'it': {
'fab':-8, 'dob':-7, 'solb':-6, 'reb':-5, 'lab':-4,
'mib':-3, 'sib':-2, 'fa':-1,
'do':0, 'sol':1, 're':2, 'la':3, 'mi':4, 'si':5, 'fad':6, 'dod':7,
'sold':8, 'red':9, 'lad':10, 'mid':11, 'sid':12
},
'es': {
'fab':-8, 'dob':-7, 'solb':-6, 'reb':-5, 'lab':-4,
'mib':-3, 'sib':-2, 'fa':-1,
'do':0, 'sol':1, 're':2, 'la':3, 'mi':4, 'si':5, 'fas':6, 'dos':7,
'sols':8, 'res':9, 'las':10, 'mis':11, 'sis':12
},
# ca = (it|es), po = es
'vl': {
'fab':-8, 'dob':-7, 'solb':-6, 'reb':-5, 'lab':-4,
'mib':-3, 'sib':-2, 'fa':-1,
'do':0, 'sol':1, 're':2, 'la':3, 'mi':4, 'si':5, 'fak':6, 'dok':7,
'solk':8, 'rek':9, 'lak':10, 'mik':11, 'sik':12
},
}
def rdict(d):
""" reverse a dict """
return dict((v,k) for k,v in d.iteritems())
num2key = dict((lang, rdict(p)) for lang, p in key2num.iteritems())
##
# How many accidentals to add/substract for different modi.
modes = {
'major': 0,
'minor': -2, # should be -3, but we want a sharp below the fifth
'ionian': 0,
'dorian': -2,
'phrygian': -3, # should be -4, but we want a sharp below the octave
'lydian': 1,
'mixolydian': -1,
'aeolian': -2, # should be -3, but we want a sharp below the fifth
'locrian': -5,
}
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