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# *****************************************************************************
# Copyright (c) 2017 Keith Ito
#
# 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.
#
# *****************************************************************************
"""
Modified from https://github.com/keithito/tacotron
"""
import re
from typing import List, Optional, Union
from torchaudio.datasets import CMUDict
from unidecode import unidecode
from .numbers import normalize_numbers
# Regular expression matching whitespace:
_whitespace_re = re.compile(r"\s+")
# List of (regular expression, replacement) pairs for abbreviations:
_abbreviations = [
(re.compile("\\b%s\\." % x[0], re.IGNORECASE), x[1])
for x in [
("mrs", "misess"),
("mr", "mister"),
("dr", "doctor"),
("st", "saint"),
("co", "company"),
("jr", "junior"),
("maj", "major"),
("gen", "general"),
("drs", "doctors"),
("rev", "reverend"),
("lt", "lieutenant"),
("hon", "honorable"),
("sgt", "sergeant"),
("capt", "captain"),
("esq", "esquire"),
("ltd", "limited"),
("col", "colonel"),
("ft", "fort"),
]
]
_pad = "_"
_punctuation = "!'(),.:;? "
_special = "-"
_letters = "abcdefghijklmnopqrstuvwxyz"
symbols = [_pad] + list(_special) + list(_punctuation) + list(_letters)
_phonemizer = None
available_symbol_set = {"english_characters", "english_phonemes"}
available_phonemizers = {"DeepPhonemizer"}
def get_symbol_list(symbol_list: str = "english_characters", cmudict_root: Optional[str] = "./") -> List[str]:
if symbol_list == "english_characters":
return [_pad] + list(_special) + list(_punctuation) + list(_letters)
elif symbol_list == "english_phonemes":
return [_pad] + list(_special) + list(_punctuation) + CMUDict(cmudict_root).symbols
else:
raise ValueError(
f"The `symbol_list` {symbol_list} is not supported."
f"Supported `symbol_list` includes {available_symbol_set}."
)
def word_to_phonemes(sent: str, phonemizer: str, checkpoint: str) -> List[str]:
if phonemizer == "DeepPhonemizer":
from dp.phonemizer import Phonemizer
global _phonemizer
_other_symbols = "".join(list(_special) + list(_punctuation))
_phone_symbols_re = r"(\[[A-Z]+?\]|" + "[" + _other_symbols + "])" # [\[([A-Z]+?)\]|[-!'(),.:;? ]]
if _phonemizer is None:
# using a global variable so that we don't have to relode checkpoint
# everytime this function is called
_phonemizer = Phonemizer.from_checkpoint(checkpoint)
# Example:
# sent = "hello world!"
# '[HH][AH][L][OW] [W][ER][L][D]!'
sent = _phonemizer(sent, lang="en_us")
# ['[HH]', '[AH]', '[L]', '[OW]', ' ', '[W]', '[ER]', '[L]', '[D]', '!']
ret = re.findall(_phone_symbols_re, sent)
# ['HH', 'AH', 'L', 'OW', ' ', 'W', 'ER', 'L', 'D', '!']
ret = [r.replace("[", "").replace("]", "") for r in ret]
return ret
else:
raise ValueError(
f"The `phonemizer` {phonemizer} is not supported. " "Supported `symbol_list` includes `'DeepPhonemizer'`."
)
def text_to_sequence(
sent: str,
symbol_list: Union[str, List[str]] = "english_characters",
phonemizer: Optional[str] = "DeepPhonemizer",
checkpoint: Optional[str] = "./en_us_cmudict_forward.pt",
cmudict_root: Optional[str] = "./",
) -> List[int]:
r"""Converts a string of text to a sequence of IDs corresponding to the symbols in the text.
Args:
sent (str): The input sentence to convert to a sequence.
symbol_list (str or List of string, optional): When the input is a string, available options include
"english_characters" and "english_phonemes". When the input is a list of string, ``symbol_list`` will
directly be used as the symbol to encode. (Default: "english_characters")
phonemizer (str or None, optional): The phonemizer to use. Only used when ``symbol_list`` is "english_phonemes".
Available options include "DeepPhonemizer". (Default: "DeepPhonemizer")
checkpoint (str or None, optional): The path to the checkpoint of the phonemizer. Only used when
``symbol_list`` is "english_phonemes". (Default: "./en_us_cmudict_forward.pt")
cmudict_root (str or None, optional): The path to the directory where the CMUDict dataset is found or
downloaded. Only used when ``symbol_list`` is "english_phonemes". (Default: "./")
Returns:
List of integers corresponding to the symbols in the sentence.
Examples:
>>> text_to_sequence("hello world!", "english_characters")
[19, 16, 23, 23, 26, 11, 34, 26, 29, 23, 15, 2]
>>> text_to_sequence("hello world!", "english_phonemes")
[54, 20, 65, 69, 11, 92, 44, 65, 38, 2]
"""
if symbol_list == "english_phonemes":
if any(param is None for param in [phonemizer, checkpoint, cmudict_root]):
raise ValueError(
"When `symbol_list` is 'english_phonemes', "
"all of `phonemizer`, `checkpoint`, and `cmudict_root` must be provided."
)
sent = unidecode(sent) # convert to ascii
sent = sent.lower() # lower case
sent = normalize_numbers(sent) # expand numbers
for regex, replacement in _abbreviations: # expand abbreviations
sent = re.sub(regex, replacement, sent)
sent = re.sub(_whitespace_re, " ", sent) # collapse whitespace
if isinstance(symbol_list, list):
symbols = symbol_list
elif isinstance(symbol_list, str):
symbols = get_symbol_list(symbol_list, cmudict_root=cmudict_root)
if symbol_list == "english_phonemes":
sent = word_to_phonemes(sent, phonemizer=phonemizer, checkpoint=checkpoint)
_symbol_to_id = {s: i for i, s in enumerate(symbols)}
return [_symbol_to_id[s] for s in sent if s in _symbol_to_id]
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