import type { DataReIm } from '../types/index.ts';
export interface ReimFFTOptions {
    inverse?: boolean;
    applyZeroShift?: boolean;
    /**
     * Write the result back into the input arrays instead of allocating new ones.
     * @default false
     */
    inPlace?: boolean;
}
/**
 * ReimFFT.
 * @param data - complex spectrum
 * @param options - options.
 * @returns FFT of complex spectrum.
 */
export declare function reimFFT(data: DataReIm, options?: ReimFFTOptions): DataReIm<Float64Array>;
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