export interface ClusterHistogram {
    data: Uint32Array;
    totalCount: number;
    bitCost: number;
}
export interface HistogramPair {
    idx1: number;
    idx2: number;
    costCombo: number;
    costDiff: number;
}
export declare function createClusterHistogram(size: number): ClusterHistogram;
export declare function clearClusterHistogram(h: ClusterHistogram): void;
export declare function copyClusterHistogram(a: ClusterHistogram, b: ClusterHistogram): void;
export declare function addClusterHistograms(a: ClusterHistogram, b: ClusterHistogram): void;
export declare function computeClusterBitCost(h: ClusterHistogram): number;
export declare function compareAndPushToQueue(out: ClusterHistogram[], tmp: ClusterHistogram, clusterSize: Uint32Array, idx1: number, idx2: number, maxNumPairs: number, pairs: HistogramPair[], numPairs: {
    value: number;
}): void;
export declare function histogramCombine(out: ClusterHistogram[], tmp: ClusterHistogram, clusterSize: Uint32Array, symbols: Uint32Array, clusters: Uint32Array, pairs: HistogramPair[], numClusters: number, symbolsSize: number, maxClusters: number, maxNumPairs: number): number;
export declare function histogramBitCostDistance(histogram: ClusterHistogram, candidate: ClusterHistogram, tmp: ClusterHistogram): number;
export declare function histogramRemap(input: ClusterHistogram[], inSize: number, clusters: Uint32Array, numClusters: number, out: ClusterHistogram[], tmp: ClusterHistogram, symbols: Uint32Array): void;
export declare function histogramReindex(out: ClusterHistogram[], symbols: Uint32Array, length: number): number;
export declare function clusterHistograms(input: ClusterHistogram[], inSize: number, maxHistograms: number, out: ClusterHistogram[], histogramSymbols: Uint32Array): number;
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