rx-player/src/main_thread/decrypt/get_key_system_configuration.ts

Canal+ HTML5 Video Player

/**
 * 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 { IMediaElement } from "../../compat/browser_compatibility_types";
import MediaKeysAttacher from "./utils/media_keys_attacher";

/**
 * Returns the name of the current key system used as well as its configuration,
 * as reported by the `MediaKeySystemAccess` itself.
 * @param {HTMLMediaElement} mediaElement
 * @returns {Array|null}
 */
export default function getKeySystemConfiguration(
  mediaElement: IMediaElement,
): [string, MediaKeySystemConfiguration] | null {
  const currentState = MediaKeysAttacher.getAwaitedState(mediaElement);
  if (currentState === null) {
    return null;
  }
  return [
    currentState.mediaKeySystemAccess.keySystem,
    currentState.mediaKeySystemAccess.getConfiguration(),
  ];
}