Revert "Move most stress rule definitions from tr_languages.c to language files"
This reverts commit 0f55204522.
This breaks using voice files like mb-de5-en. It could also use
named values for the stress rules (e.g. 'first-syllable').
Move most stress rule definitions from tr_languages.c to language files
Keyword stressRule in voices.c handles setting langopts->stress_rule.
tr_languages.c still contains the setting for some languages that don't have a language file yet.
Contributes to:
Issue #218, https://github.com/espeak-ng/espeak-ng/issues/218
Move handling of SetLetterVowel() to language files
Contributes to:
Issue #218, https://github.com/espeak-ng/espeak-ng/issues/218
Changes:
language files have a new keyword letterVowel. It can be a latin alphabet from a-z or a hex value (used by bulgarian).
Errors in parsing the values are only reported, nothing is done about them.
About testing:
I haven't noticed any differences in the output audio with letterVowel set or unset in any tested language. The code seems to work and the correct bits seem to be set, but I don't know how to confirm from the final audio.
TODO:
1. Write better documentation in docs/voices.md
2. The code uses new_translator. Should it use translator instead?
This is not used by any of the espeak-ng voices and languages.
Additionally, this functionality would be superceded by support
for specifying the language used by different scripts in the
language argument on the command line.
Remove the IPA phoneme table and associated und-fonipa voice.
Supporting phoneme-based voices in espeak-ng is currently complex,
and has issues that need to be fixed in the core code before
adding support for them.