common_whisper.js

const WHISPER_LANGUAGES = [
    ['en', 'english'],
    ['zh', 'chinese'],
    ['de', 'german'],
    ['es', 'spanish'],
    ['ru', 'russian'],
    ['ko', 'korean'],
    ['fr', 'french'],
    ['ja', 'japanese'],
    ['pt', 'portuguese'],
    ['tr', 'turkish'],
    ['pl', 'polish'],
    ['ca', 'catalan'],
    ['nl', 'dutch'],
    ['ar', 'arabic'],
    ['sv', 'swedish'],
    ['it', 'italian'],
    ['id', 'indonesian'],
    ['hi', 'hindi'],
    ['fi', 'finnish'],
    ['vi', 'vietnamese'],
    ['he', 'hebrew'],
    ['uk', 'ukrainian'],
    ['el', 'greek'],
    ['ms', 'malay'],
    ['cs', 'czech'],
    ['ro', 'romanian'],
    ['da', 'danish'],
    ['hu', 'hungarian'],
    ['ta', 'tamil'],
    ['no', 'norwegian'],
    ['th', 'thai'],
    ['ur', 'urdu'],
    ['hr', 'croatian'],
    ['bg', 'bulgarian'],
    ['lt', 'lithuanian'],
    ['la', 'latin'],
    ['mi', 'maori'],
    ['ml', 'malayalam'],
    ['cy', 'welsh'],
    ['sk', 'slovak'],
    ['te', 'telugu'],
    ['fa', 'persian'],
    ['lv', 'latvian'],
    ['bn', 'bengali'],
    ['sr', 'serbian'],
    ['az', 'azerbaijani'],
    ['sl', 'slovenian'],
    ['kn', 'kannada'],
    ['et', 'estonian'],
    ['mk', 'macedonian'],
    ['br', 'breton'],
    ['eu', 'basque'],
    ['is', 'icelandic'],
    ['hy', 'armenian'],
    ['ne', 'nepali'],
    ['mn', 'mongolian'],
    ['bs', 'bosnian'],
    ['kk', 'kazakh'],
    ['sq', 'albanian'],
    ['sw', 'swahili'],
    ['gl', 'galician'],
    ['mr', 'marathi'],
    ['pa', 'punjabi'],
    ['si', 'sinhala'],
    ['km', 'khmer'],
    ['sn', 'shona'],
    ['yo', 'yoruba'],
    ['so', 'somali'],
    ['af', 'afrikaans'],
    ['oc', 'occitan'],
    ['ka', 'georgian'],
    ['be', 'belarusian'],
    ['tg', 'tajik'],
    ['sd', 'sindhi'],
    ['gu', 'gujarati'],
    ['am', 'amharic'],
    ['yi', 'yiddish'],
    ['lo', 'lao'],
    ['uz', 'uzbek'],
    ['fo', 'faroese'],
    ['ht', 'haitian creole'],
    ['ps', 'pashto'],
    ['tk', 'turkmen'],
    ['nn', 'nynorsk'],
    ['mt', 'maltese'],
    ['sa', 'sanskrit'],
    ['lb', 'luxembourgish'],
    ['my', 'myanmar'],
    ['bo', 'tibetan'],
    ['tl', 'tagalog'],
    ['mg', 'malagasy'],
    ['as', 'assamese'],
    ['tt', 'tatar'],
    ['haw', 'hawaiian'],
    ['ln', 'lingala'],
    ['ha', 'hausa'],
    ['ba', 'bashkir'],
    ['jw', 'javanese'],
    ['su', 'sundanese'],
];

// @ts-ignore
export const WHISPER_LANGUAGE_MAPPING = new Map(WHISPER_LANGUAGES);
// @ts-ignore
const WHISPER_TO_LANGUAGE_CODE_MAPPING = new Map([
    ...WHISPER_LANGUAGES.map(([k, v]) => [v, k]),
    ...[
        ['burmese', 'my'],
        ['valencian', 'ca'],
        ['flemish', 'nl'],
        ['haitian', 'ht'],
        ['letzeburgesch', 'lb'],
        ['pushto', 'ps'],
        ['panjabi', 'pa'],
        ['moldavian', 'ro'],
        ['moldovan', 'ro'],
        ['sinhalese', 'si'],
        ['castilian', 'es'],
    ],
]);

/**
 * @param {string} language The language name or code
 * @returns {string} The language code
 */
export function whisper_language_to_code(language) {
    language = language.toLowerCase();

    // Map to code from user-friendly name (e.g., "english" -> "en")
    let language_code = WHISPER_TO_LANGUAGE_CODE_MAPPING.get(language);

    if (language_code === undefined) {
        // User provided something that is not a language name

        // Perhaps the user passed the special token itself
        const language_special_token = language.match(/^<\|([a-z]{2})\|>$/);
        if (language_special_token) {
            language = language_special_token[1];
        }

        if (WHISPER_LANGUAGE_MAPPING.has(language)) {
            // User provided the language code directly (e.g., "en")
            language_code = language;
        } else {
            // User provided something that is not a language code or name
            const is_language_code = language.length === 2;
            const langs = is_language_code ? WHISPER_LANGUAGE_MAPPING.keys() : WHISPER_LANGUAGE_MAPPING.values();

            throw new Error(
                `Language "${language}" is not supported. Must be one of: ${JSON.stringify(Array.from(langs))}`,
            );
        }
    }
    return language_code;
}