@jackdbd/eleventy-plugin-text-to-speech/lib/media-type.js

Eleventy plugin that uses text-to-speech to generate audio assets for your website, then injects audio players in your HTML.

/**
 * The `<audio>` tag supports 3 audio formats: MP3 (audio/mpeg), WAV (audio/wav),
 * and OGG (audio/ogg).
 *
 * @see [wikipedia.org - Supported media types in various browsers](https://en.wikipedia.org/wiki/HTML5_audio)
 * @see [stackoverflow.com - HTML5 audio Browsers unable to decode wav file encoded with IMA ADPCM](https://stackoverflow.com/questions/36866611/html5-audio-browsers-unable-to-decode-wav-file-encoded-with-ima-adpcm)
 */
export const mediaType = (ext) => {
    switch (ext) {
        case '.flac':
            return { value: 'audio/flac' };
        case '.mp3':
            return { value: 'audio/mpeg' };
        case '.opus':
            return { value: 'audio/ogg' };
        case '.PCM':
        case '.pcm':
        case '.wav':
            return { value: 'audio/wav' };
        default:
            return {
                error: new Error(`file extension "${ext}" does not have a matching media type for the <code>audio</code> element`)
            };
    }
};
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