/**
 * Vietnamese Grapheme-to-Phoneme converter for React Native.
 * Matches Python viphoneme output exactly using simplified character-by-character conversion.
 */
export declare class VietnameseG2P {
    static TAG: string;
    private symbolToId;
    private viLangId;
    private viphoneToneMap;
    private viToneOffset;
    private toneChars;
    private onsetMappings;
    private codaMappings;
    private vowelMappings;
    private diphthongEndings;
    initialize(symbolToId: Map<string, number>, viLangId: number): void;
    private getTone;
    private removeAccents;
    private syllableToPhonemes;
    textToPhonemes(text: string): {
        phonemes: number[];
        tones: number[];
        languages: number[];
    };
    addBlanks(phonemes: number[], tones: number[], languages: number[]): {
        phonemes: number[];
        tones: number[];
        languages: number[];
    };
}
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