/**
 * Copyright 2015 CANAL+ Group
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import type { IMediaKeySession } from "../../compat/browser_compatibility_types";
import type { CancellationSignal } from "../../utils/task_canceller";
import type { IProcessedProtectionData, IMediaKeySessionStores } from "./types";
import { MediaKeySessionLoadingType } from "./types";
import type KeySessionRecord from "./utils/key_session_record";
/**
 * Handle MediaEncryptedEvents sent by a HTMLMediaElement:
 * Either create a MediaKeySession, recuperate a previous MediaKeySession or
 * load a persistent session.
 *
 * Some previously created MediaKeySession can be closed in this process to
 * respect the maximum limit of concurrent MediaKeySession, as defined by the
 * `EME_MAX_SIMULTANEOUS_MEDIA_KEY_SESSIONS` config property.
 *
 * You can refer to the events emitted to know about the current situation.
 * @param {Object} initializationData
 * @param {Object} stores
 * @param {string} wantedSessionType
 * @param {number} maxSessionCacheSize
 * @param {Object} cancelSignal
 * @returns {Promise}
 */
export default function createOrLoadSession(initializationData: IProcessedProtectionData, stores: IMediaKeySessionStores, wantedSessionType: MediaKeySessionType, maxSessionCacheSize: number, cancelSignal: CancellationSignal): Promise<ICreateOrLoadSessionResult>;
/** Information concerning a MediaKeySession. */
export interface IMediaKeySessionContext {
    /** The MediaKeySession itself. */
    mediaKeySession: IMediaKeySession;
    /** The type of MediaKeySession (e.g. "temporary"). */
    sessionType: MediaKeySessionType;
    /** `KeySessionRecord` assiociated to this MediaKeySession. */
    keySessionRecord: KeySessionRecord;
}
/** Event emitted when a new MediaKeySession has been created. */
export interface ICreatedSession {
    type: MediaKeySessionLoadingType.Created;
    value: IMediaKeySessionContext;
}
/** Event emitted when an already-loaded MediaKeySession is used. */
export interface ILoadedOpenSession {
    type: MediaKeySessionLoadingType.LoadedOpenSession;
    value: IMediaKeySessionContext;
}
/** Event emitted when a persistent MediaKeySession has been loaded. */
export interface ILoadedPersistentSessionEvent {
    type: MediaKeySessionLoadingType.LoadedPersistentSession;
    value: IMediaKeySessionContext;
}
/** Every possible result returned by `createOrLoadSession`. */
export type ICreateOrLoadSessionResult = ICreatedSession | ILoadedOpenSession | ILoadedPersistentSessionEvent;
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