import { SuperVADEngine } from "./engine";
import { SuperVADParameters } from "./settings";
export type SuperVADRealtimeState = 'active' | 'deactivating' | 'deactivated';
export type SuperVADRealtimeEvent = {
    kind: 'activated';
} | {
    kind: 'valid';
} | {
    kind: 'activation-aborted';
} | {
    kind: 'deactivating';
} | {
    kind: 'deactivation-aborted';
} | {
    kind: 'complete';
    buffer: Float32Array;
    tokens: number;
} | {
    kind: 'canceled';
};
/**
 * Realtime voice activity detection. This class it not concurrent safe.
 */
export declare class SuperVADRealtime {
    /**
     * Create realtime SuperVAD instance.
     * @param engine inference engine
     * @param parameters detection parameters
     * @returns realtime SuperVAD instance
     */
    static create(engine: SuperVADEngine, parameters: SuperVADParameters): SuperVADRealtime;
    readonly engine: SuperVADEngine;
    readonly parameters: SuperVADParameters;
    private _state;
    private _preBuffer;
    private _activeBuffer;
    private _activeTokens;
    private _stateTokens;
    private _stateValid;
    private constructor();
    /**
     * Process next audio token.
     * @param token audio token
     * @returns event if state changed, null otherwise
     */
    process(token: Float32Array): Promise<SuperVADRealtimeEvent | null>;
}