export type FrozenArray<T> = Array<T>;
export type Inputs = FrozenArray<FrozenArray<Float32Array>>;
export type Outputs = FrozenArray<FrozenArray<Float32Array>>;
export type Parameters = {
    [parameterName: string]: Float32Array;
};
/**
 * This class enables to use inline AudioWorklet.
 */
export declare abstract class AudioWorkletProcessor {
    protected port: MessagePort;
    protected abstract process(inputs: Inputs, outputs: Outputs, parameters: Parameters): boolean;
    constructor(_options?: AudioWorkletNodeOptions);
}
/**
 * This class extends `AudioWorkletProcessor`.
 */
export declare abstract class OverlapAddProcessor extends AudioWorkletProcessor {
    private static readonly RENDER_QUANTUM_SIZE;
    protected frameSize: number;
    protected hopSize: number;
    protected numberOfOverlaps: number;
    private inputBuffers;
    private inputBuffersHead;
    private inputBuffersToSend;
    private outputBuffers;
    private outputBuffersToRetrieve;
    constructor(options: AudioWorkletNodeOptions);
    protected abstract processOverlapAdd(inputs: Inputs, outputs: Outputs, parameters: Parameters): void;
    /** @override */
    protected process(inputs: Inputs, outputs: Outputs, parameters: Parameters): boolean;
    private reallocateChannelsIfNeeded;
    private allocateInputChannels;
    private allocateOutputChannels;
    private readInputs;
    private writeOutputs;
    private shiftInputBuffers;
    private shiftOutputBuffers;
    private prepareInputBuffersToSend;
    private handleOutputBuffersToRetrieve;
}
/**
 * This function creates AudioWorklet script as Data URL.
 * @param {AudioWorkletGlobalScope.AudioWorkletProcessor} processor This argument is class that extends `AudioWorkletProcessor`.
 * @return {string} Return value is AudioWorklet script as Data URL.
 */
export declare function createModule(processor: new (options: AudioWorkletNodeOptions) => AudioWorkletProcessor): string;
/**
 * This function adds module as AudioWorklet.
 * @param {AudioContext} context This argument is instance of `AudioContext` for adding AudioWorklet module.
 * @param {AudioWorkletGlobalScope.AudioWorkletProcessor} processor This argument is class that extends `AudioWorkletProcessor`.
 * @param {WorkletOptions} options This argument is one of 'omit', 'same-origin', 'include'. The default value is 'same-origin'.
 * @return {Promise<void>} Return value is `Promise` that `addModule` returns.
 */
export declare function addAudioWorklet(context: AudioContext, processor: new (options: AudioWorkletNodeOptions) => AudioWorkletProcessor, options?: WorkletOptions): Promise<void>;
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