import type { AudioAnalysis, BuiltFilterChain, NoiseAnalysis, PresetName, RestorationPlan } from "../types/audio.js";
import { type RestorationPlanOptions } from "./restoration-plan.js";
export interface FilterBuildOptions {
    preset: PresetName;
    strength: number;
    allowTonalCorrection?: boolean;
    /** When provided, skip re-planning and only compile. */
    plan?: RestorationPlan;
    noise?: NoiseAnalysis;
    noiseProfile?: RestorationPlanOptions["noiseProfile"];
    noiseType?: RestorationPlanOptions["noiseType"];
    artifactProtection?: RestorationPlanOptions["artifactProtection"];
    normalize?: boolean;
    intensityScale?: number;
    nfOffsetDeltaDb?: number;
}
/** Compile a restoration plan into an FFmpeg filter string. No limiter stage. */
export declare function compileFilterChain(plan: RestorationPlan): BuiltFilterChain;
/**
 * Build full-mix filter chain from analysis + options.
 * Prefer passing a pre-built RestorationPlan from the pipeline.
 */
export declare function buildFilterChain(analysis: AudioAnalysis, options: FilterBuildOptions): BuiltFilterChain;
export declare function appendFilter(chain: string | null, filter: string): string;
/** Count primary afftdn stages — must be 0 or 1. */
export declare function countPrimaryDenoisers(plan: RestorationPlan): number;