import type { AudioBufferSlice } from '../make-iterator-with-priming';
export declare const HEALTHY_BUFFER_THRESHOLD_SECONDS = 1;
export declare const ALLOWED_GLOBAL_TIME_ANCHOR_SHIFT = 0.1;
export type QueuedNode = {
    node: AudioBufferSourceNode;
    timestamp: number;
    buffer: AudioBuffer;
    sourceDurationInSeconds: number;
    scheduledTime: number;
    playbackRate: number;
    scheduledAtAnchor: number;
};
export type QueuedPeriod = {
    from: number;
    until: number;
};
export type MakeAudioIteratorOptions = {
    startFromSecond: number;
    iterator: AsyncGenerator<AudioBufferSlice, void, unknown>;
    unscheduleAudioNode: (node: AudioBufferSourceNode) => void;
};
export declare const makeAudioIterator: ({ startFromSecond, iterator, unscheduleAudioNode, }: MakeAudioIteratorOptions) => {
    destroy: () => void;
    getNextFn: () => Promise<IteratorResult<AudioBufferSlice, void>>;
    isDestroyed: () => boolean;
    addQueuedAudioNode: (queuedNode: QueuedNode) => void;
    guessNextTimestamp: () => number;
    getQueuedPeriod: () => {
        from: number;
        until: number;
    } | null;
};
export type AudioIterator = ReturnType<typeof makeAudioIterator>;
export declare const isAlreadyQueued: (time: number, queuedPeriod: {
    from: number;
    until: number;
} | null | undefined) => boolean;