Zazama / node-id3

export function retrievePictureAndMimeType({

    filenameOrBuffer,

    mimeType

}: {

    filenameOrBuffer?: Buffer | string

    mimeType?: string

}) {

    if (!filenameOrBuffer) {

        throw new TypeError("Missing image buffer or filename")

    }

    const pictureBuffer = isBuffer(filenameOrBuffer) ?

        filenameOrBuffer : fs.readFileSync(filenameOrBuffer)

    return {

        pictureBuffer,

        mimeType: mimeType ?? getPictureMimeTypeFromBuffer(pictureBuffer)

    }

}