type Progress = {
    readonly peaks: Float32Array;
    readonly completedPeaks: number;
    readonly totalPeaks: number;
    readonly final: boolean;
};
type WaveformPeakProcessorOptions = {
    readonly totalPeaks: number;
    readonly samplesPerPeak: number;
    readonly onProgress?: (progress: Progress) => void;
    readonly progressIntervalInMs: number;
    readonly now: () => number;
};
type WaveformPeakProcessor = {
    readonly peaks: Float32Array;
    processSampleChunk: (floats: Float32Array, channels: number) => void;
    finalize: () => void;
};
export declare const emitWaveformProgress: ({ completedPeaks, final, onProgress, peaks, totalPeaks, }: Progress & {
    readonly onProgress?: ((progress: Progress) => void) | undefined;
}) => void;
export declare const createWaveformPeakProcessor: ({ totalPeaks, samplesPerPeak, onProgress, progressIntervalInMs, now, }: WaveformPeakProcessorOptions) => WaveformPeakProcessor;
export {};