/**
 * An IterableIterator that iterates a DataBuffer from startIndex to endIndex with an optional filter.
 * @internal
 */
export declare class DataBufferView<T> implements IterableIterator<T> {
    private data;
    private index;
    private size;
    private endIndex;
    private length;
    private normalizedIndex;
    private filterCallback?;
    constructor(data: T[], size: number, startIndex: number, endIndex: number, length: number, filter?: (value: T) => boolean);
    next(): IteratorResult<T, T>;
    findIndex(filter: (value: T) => boolean): number;
    /**
     * Returns an iterator of a section of this buffer.
     * @param start - The beginning index of the specified portion of the buffer.
     * @param end - The end index of the specified portion of the buffer. This is exclusive of the element at the index 'end'.
     * If end is undefined, then the slice extends to the end of the buffer.
     */
    slice(start: number, end?: number): IterableIterator<T>;
    /**
     * Returns an iterator of a section of this buffer.
     * @param filter - An optional callback filter.
     */
    filter(filter: (value: T) => boolean): IterableIterator<T>;
    /**
     * Returns an iterator of a section of this buffer.
     * @param start - The beginning index of the specified portion of the buffer.
     * @param end - The end index of the specified portion of the buffer. This is exclusive of the element at the index 'end'.
     * If end is undefined, then the slice extends to the end of the buffer.
     * @param filter - An optional callback filter.
     */
    sliceAndFilter(start: number, end?: number, filter?: (value: T) => boolean): IterableIterator<T>;
    [Symbol.iterator](): IterableIterator<T>;
}
/**
 * A read-only data buffer.
 */
interface ReadOnlyDataBuffer<T> extends Iterable<T> {
    length: number;
    /**
     * Takes an integer value and returns the item at that index,
     * allowing for positive and negative integers.
     * Negative integers count back from the last item in the array.
     */
    at(index: number): T | undefined;
}
/**
 * A read-only data buffer.
 * @internal
 */
export type IReadOnlyDataBuffer<T> = ReadOnlyDataBuffer<T>;
/**
 * Holds a data in a ring-buffer.
 * @internal
 */
export default class DataBuffer<T> implements IReadOnlyDataBuffer<T> {
    length: number;
    private size;
    private startIndex;
    private endIndex;
    private data;
    /**
     * Constructor.
     * @param size - An optional buffer size.
     */
    constructor(size?: number);
    /**
     * Clears this DataBuffer.
     * @param size - An optional new buffer size.
     */
    clear(size?: number): void;
    /**
     * Adds data to this DataBuffer.
     * @param elements - The new elements.
     */
    push(...elements: T[]): void;
    /**
     * Takes an integer value and returns the item at that index,
     * allowing for positive and negative integers.
     * Negative integers count back from the last item in the array.
     */
    at(index: number): T | undefined;
    /**
     * Returns an iterator of a section of this buffer.
     * @param start - The beginning index of the specified portion of the buffer.
     * @param end - The end index of the specified portion of the buffer. This is exclusive of the element at the index 'end'.
     * If end is undefined, then the slice extends to the end of the buffer.
     */
    slice(start: number, end?: number): DataBufferView<T>;
    /**
     * Returns an iterator of a section of this buffer.
     * @param filter - An optional callback filter.
     */
    filter(filter: (value: T) => boolean): DataBufferView<T>;
    /**
     * Returns an iterator of a section of this buffer.
     * @param start - The beginning index of the specified portion of the buffer.
     * @param end - The end index of the specified portion of the buffer. This is exclusive of the element at the index 'end'.
     * If end is undefined, then the slice extends to the end of the buffer.
     * @param filter - An optional callback filter.
     */
    sliceAndFilter(start: number, end?: number, filter?: (value: T) => boolean): DataBufferView<T>;
    view(): DataBufferView<T>;
    [Symbol.iterator](): IterableIterator<T>;
}
export {};