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# Copyright © 2016-2022 Jakub Wilk <jwilk@jwilk.net>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the “Software”), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
'''
English phonetics
'''
import functools
import os
consonants = frozenset(
'DNSTZbdfghjklmnprstvwz'
'ðŋʃθʒbdfɡhjkɬmnpɹstvwz'
)
vowels = frozenset(
'03@AEIOUVaeiou'
'ɒɜəɑɛɪɔʊʌɐeiɔu'
)
accents = frozenset(
",'"
"ˌˈ"
)
espeak = None
overrides = {}
def init():
'''
initialize underlying speech engine
'''
global espeak # pylint: disable=global-statement,global-variable-not-assigned
from lib import espeak # pylint: disable=redefined-outer-name,import-outside-toplevel
espeak.init()
espeak.set_voice_by_name('en')
here = os.path.dirname(__file__)
# Ideally false positives should be fixed in eSpeak,
# but as a stop-gap measure, we carry data file to correct some of them.
path = f'{here}/../data/overrides'
with open(path, 'rt', encoding='UTF-8') as file:
for line in file:
line = line.strip()
(word, phon) = line.split('\t', 1)
word = word.lower()
overrides[word] = phon
@functools.lru_cache(maxsize=9999)
def text_to_phonemes(s, *, ipa=False):
'''
translate text to phonemes
'''
s = overrides.get(s.lower(), s)
if s.startswith('[[') and s.endswith(']]'):
return s.split('\t')[ipa][2:-2]
else:
return espeak.text_to_phonemes(s, ipa=ipa)
__all__ = [
'consonants',
'vowels',
'accents',
'text_to_phonemes',
]
# vim:ts=4 sts=4 sw=4 et
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