import type { AV1CodecConfig, ISOBMFFBox } from '../types';
/** Parse `pitm` (primary item id). */
export declare function parsePitm(data: Uint8Array): number;
/** Parse `iref` child boxes into flat references. */
export declare function parseIref(box: ISOBMFFBox): ItemReference[];
/** Parse `ipma` associations (which ipco properties apply to which item). */
export declare function parseIpma(data: Uint8Array): PropertyAssociation[];
/**
 * The item holding the primary image's alpha, or null.
 *
 * Per MIAF, alpha is an ordinary `av01` item that points at the image it
 * belongs to with an `auxl` reference and says what it is with an `auxC`
 * property. Checking the `auxC` type matters: a depth map is an auxiliary
 * image too, and applying one as transparency would punch holes in a photo.
 * `urn:mpeg:hevc:2015:auxid:1` is the older HEVC spelling some writers use.
 */
export declare function findAlphaItemId(boxes: ISOBMFFBox[]): number | null;
/** Parse a `grid` derived-image item body. */
export declare function parseGridBody(data: Uint8Array): Omit<AvifGridInfo, 'tileItemIds' | 'tileWidth' | 'tileHeight'>;
/**
 * Resolve the full picture of an AVIF file's primary image with per-item
 * property association (grid-safe, unlike the legacy first-property scan).
 */
export declare function getAvifItemInfo(buffer: Uint8Array, boxes: ISOBMFFBox[]): AvifItemInfo;
/**
 * Extract one item's payload, honoring the iloc construction method:
 * 0 = absolute file offsets, 1 = offsets into the `idat` box inside `meta`.
 */
export declare function getItemPayload(buffer: Uint8Array, boxes: ISOBMFFBox[], itemId: number): Uint8Array | null;
export declare interface AvifGridInfo {
  rows: number
  columns: number
  outputWidth: number
  outputHeight: number
  tileItemIds: number[]
  tileWidth: number
  tileHeight: number
}
export declare interface AvifItemInfo {
  primaryItemId: number
  primaryItemType: string
  width: number
  height: number
  bitDepth: number
  rotation: number
  mirror: number | null
  hasAlpha: boolean
  av1C: AV1CodecConfig | null
  grid: AvifGridInfo | null
}
declare interface ItemReference {
  referenceType: string
  fromItemId: number
  toItemIds: number[]
}
declare interface PropertyAssociation {
  itemId: number
  propertyIndexes: number[]
}