forked from mrq/tortoise-tts
85 lines
2.9 KiB
Python
85 lines
2.9 KiB
Python
import re
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def split_and_recombine_text(text, desired_length=200, max_length=300):
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"""Split text it into chunks of a desired length trying to keep sentences intact."""
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# normalize text, remove redundant whitespace and convert non-ascii quotes to ascii
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text = re.sub(r'\n\n+', '\n', text)
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text = re.sub(r'\s+', ' ', text)
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text = re.sub(r'[“”]', '"', text)
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rv = []
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in_quote = False
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current = ""
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split_pos = []
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pos = -1
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def seek(delta):
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nonlocal pos, in_quote, text
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is_neg = delta < 0
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for _ in range(abs(delta)):
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if is_neg:
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pos -= 1
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else:
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pos += 1
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if text[pos] == '"':
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in_quote = not in_quote
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return text[pos], text[pos+1] if pos < len(text)-1 else ""
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def commit():
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nonlocal rv, current, split_pos
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rv.append(current)
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current = ""
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split_pos = []
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while pos < len(text) - 1:
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c, next_c = seek(1)
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current += c
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# do we need to force a split?
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if len(current) >= max_length:
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if len(split_pos) > 0 and len(current) > (desired_length / 2):
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# we have at least one sentence and we are over half the desired length, seek back to the last split
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d = pos - split_pos[-1]
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seek(-d)
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current = current[:-d]
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else:
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# no full sentences, seek back until we are not in the middle of a word and split there
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while c not in '!?.\n ' and pos > 0 and len(current) > desired_length:
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c, _ = seek(-1)
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current = current[:-1]
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commit()
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# check for sentence boundaries
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elif not in_quote and (c in '!?\n' or (c == '.' and next_c in '\n ')):
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split_pos.append(pos)
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if len(current) >= desired_length:
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commit()
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rv.append(current)
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# clean up
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rv = [s.strip() for s in rv]
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rv = [s for s in rv if len(s) > 0]
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return rv
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if __name__ == '__main__':
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import unittest
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class Test(unittest.TestCase):
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def test_split_and_recombine_text(self):
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text = """
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This is a sample sentence.
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This is another sample sentence.
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This is a longer sample sentence that should force a split inthemiddlebutinotinthislongword.
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"Don't split my quote... please"
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"""
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self.assertEqual(split_and_recombine_text(text, desired_length=20, max_length=40),
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['This is a sample sentence.',
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'This is another sample sentence.',
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'This is a longer sample sentence that',
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'should force a split',
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'inthemiddlebutinotinthislongword.',
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'"Don\'t split my quote... please"'])
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unittest.main()
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