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| # Copyright (c) 2024 Alibaba Inc (authors: Xiang Lyu, Zhihao Du) | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| import re | |
| chinese_char_pattern = re.compile(r'[\u4e00-\u9fff]+') | |
| # whether contain chinese character | |
| def contains_chinese(text): | |
| return bool(chinese_char_pattern.search(text)) | |
| # replace special symbol | |
| def replace_corner_mark(text): | |
| text = text.replace('²', '平方') | |
| text = text.replace('³', '立方') | |
| return text | |
| # remove meaningless symbol | |
| def remove_bracket(text): | |
| text = text.replace('（', '').replace('）', '') | |
| text = text.replace('【', '').replace('】', '') | |
| text = text.replace('`', '').replace('`', '') | |
| text = text.replace("——", " ") | |
| return text | |
| # spell Arabic numerals | |
| def spell_out_number(text: str, inflect_parser): | |
| new_text = [] | |
| st = None | |
| for i, c in enumerate(text): | |
| if not c.isdigit(): | |
| if st is not None: | |
| num_str = inflect_parser.number_to_words(text[st: i]) | |
| new_text.append(num_str) | |
| st = None | |
| new_text.append(c) | |
| else: | |
| if st is None: | |
| st = i | |
| if st is not None and st < len(text): | |
| num_str = inflect_parser.number_to_words(text[st:]) | |
| new_text.append(num_str) | |
| return ''.join(new_text) | |
| # split paragrah logic： | |
| # 1. per sentence max len token_max_n, min len token_min_n, merge if last sentence len less than merge_len | |
| # 2. cal sentence len according to lang | |
| # 3. split sentence according to puncatation | |
| def split_paragraph(text: str, tokenize, lang="zh", token_max_n=80, token_min_n=60, merge_len=20, comma_split=False): | |
| def calc_utt_length(_text: str): | |
| if lang == "zh": | |
| return len(_text) | |
| else: | |
| return len(tokenize(_text)) | |
| def should_merge(_text: str): | |
| if lang == "zh": | |
| return len(_text) < merge_len | |
| else: | |
| return len(tokenize(_text)) < merge_len | |
| if lang == "zh": | |
| pounc = ['。', '？', '！', '；', '：', '.', '?', '!', ';'] | |
| else: | |
| pounc = ['.', '?', '!', ';', ':'] | |
| if comma_split: | |
| pounc.extend(['，', ',']) | |
| st = 0 | |
| utts = [] | |
| for i, c in enumerate(text): | |
| if c in pounc: | |
| if len(text[st: i]) > 0: | |
| utts.append(text[st: i] + c) | |
| if i + 1 < len(text) and text[i + 1] in ['"', '”']: | |
| tmp = utts.pop(-1) | |
| utts.append(tmp + text[i + 1]) | |
| st = i + 2 | |
| else: | |
| st = i + 1 | |
| final_utts = [] | |
| cur_utt = "" | |
| for utt in utts: | |
| if calc_utt_length(cur_utt + utt) > token_max_n and calc_utt_length(cur_utt) > token_min_n: | |
| final_utts.append(cur_utt) | |
| cur_utt = "" | |
| cur_utt = cur_utt + utt | |
| if len(cur_utt) > 0: | |
| if should_merge(cur_utt) and len(final_utts) != 0: | |
| final_utts[-1] = final_utts[-1] + cur_utt | |
| else: | |
| final_utts.append(cur_utt) | |
| return final_utts | |
| # remove blank between chinese character | |
| def replace_blank(text: str): | |
| out_str = [] | |
| for i, c in enumerate(text): | |
| if c == " ": | |
| if ((text[i + 1].isascii() and text[i + 1] != " ") and | |
| (text[i - 1].isascii() and text[i - 1] != " ")): | |
| out_str.append(c) | |
| else: | |
| out_str.append(c) | |
| return "".join(out_str) | |