fix(espeak_wrapper): read phonemize() input from file

Avoids utf8 encoding issues on Windows when passing the text directly.
Fixes https://github.com/coqui-ai/TTS/discussions/3761

TTS/tts/utils/text/phonemizers/espeak_wrapper.py

@@ -3,6 +3,8 @@
 import logging
 import re
 import subprocess
+import tempfile
+from pathlib import Path
 from typing import Optional
 
 from packaging.version import Version
@@ -184,7 +186,12 @@ class ESpeak(BasePhonemizer):
         if tie:
             args.append("--tie=%s" % tie)
 
-        args.append(text)
+        tmp = tempfile.NamedTemporaryFile(mode="w+t", delete=False, encoding="utf8")
+        tmp.write(text)
+        tmp.close()
+        args.append("-f")
+        args.append(tmp.name)
+
         # compute phonemes
         phonemes = ""
         for line in _espeak_exe(self.backend, args):
@@ -200,6 +207,7 @@ class ESpeak(BasePhonemizer):
             ph_decoded = re.sub(r"\(.+?\)", "", line)
 
             phonemes += ph_decoded.strip()
+        Path(tmp.name).unlink()
         return phonemes.replace("_", separator)
 
     def _phonemize(self, text: str, separator: str = "") -> str:

tests/text_tests/test_phonemizer.py

@@ -116,6 +116,12 @@ class TestEspeakNgPhonemizer(unittest.TestCase):
         output = self.phonemizer.phonemize(text, separator="")
         self.assertEqual(output, gt)
 
+        # UTF8 characters
+        text = "źrebię"
+        gt = "ʑrˈɛbjɛ"
+        output = ESpeak("pl").phonemize(text, separator="")
+        self.assertEqual(output, gt)
+
     def test_name(self):
         self.assertEqual(self.phonemizer.name(), "espeak")