/**
 * Browser-side phonemization for Kitten TTS.
 *
 * Primary: espeak-ng via WASM (phonemizer.js by xenova) — matches official kittentts package.
 * Fallback: 234K-word espeak-ng dictionary + rule engine for unknown words.
 */
/**
 * Convert pre-phonemized text (IPA string) to input_ids.
 *
 * The phonemizer splits tokens with regex: /\w+|[^\w\s]/g
 * then joins with spaces, looks up each char in symbol table,
 * and wraps with start/end tokens.
 */
export declare function phonemesToInputIds(phonemes: string): number[];
/**
 * Convert English text to IPA phonemes using espeak-ng WASM.
 * Preserves punctuation to match official kittentts (which uses
 * phonemizer.backend.EspeakBackend with preserve_punctuation=True).
 *
 * espeak-ng strips punctuation, so we:
 * 1. Extract punctuation + positions from the original text
 * 2. Phonemize the stripped text
 * 3. Re-insert punctuation at their original word boundaries
 */
export declare function textToPhonemesEspeak(text: string): Promise<string>;
/**
 * Convert English text to IPA phonemes using the large dictionary + rule engine.
 * Preserves punctuation (matching espeak preserve_punctuation=True).
 *
 * espeak-ng with preserve_punctuation=True attaches punctuation directly to
 * the adjacent phoneme word (no space before sentence-final punctuation).
 */
export declare function textToPhonemesDictRules(text: string): Promise<string>;
/**
 * Convert English text to input_ids.
 * Primary: espeak-ng WASM (exact match with official kittentts).
 * Fallback: large dictionary + rule engine (for Safari where WASM fails).
 */
export declare function textToInputIds(text: string): Promise<{
    ids: number[];
    method: 'wasm' | 'dictionary';
}>;