import FilterSupport from './FilterSupport.js';
import type { SamplePipe } from './FilterSupport.js';
/**
 * Pulls samples through a SoundTouch pipe from a source.
 * Used internally for real-time processing and playback.
 */
export default class SimpleFilter extends FilterSupport {
    private callback;
    private sourceSound;
    private historyBufferSize;
    private _sourcePosition;
    private outputBufferPosition;
    private _position;
    private _scratchBuffer;
    /**
     * Creates a SimpleFilter instance.
     * @param sourceSound - Source object with extract method
     * @param pipe - SoundTouch or other SamplePipe
     * @param callback - Optional callback for end of playback
     */
    constructor(sourceSound: {
        extract(target: Float32Array, numFrames: number, position: number): number;
    }, pipe: SamplePipe, callback?: () => void);
    get position(): number;
    set position(position: number);
    get sourcePosition(): number;
    set sourcePosition(sourcePosition: number);
    onEnd(): void;
    fillInputBuffer(numFrames?: number): void;
    extract(target: Float32Array, numFrames?: number): number;
    handleSampleData(event: {
        data: Float32Array;
    }): void;
    clear(): void;
}
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