rx-player/src/parsers/manifest/dash/common/get_http_utc-timing_url.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 { IMPDIntermediateRepresentation } from "../node_parser_types";

type ISupportedHttpUtcTimingScheme =
  | {
      schemeIdUri: "urn:mpeg:dash:utc:http-iso:2014";
      value: string;
    }
  | {
      schemeIdUri: "urn:mpeg:dash:utc:http-xsdate:2014";
      value: string;
    };

/**
 * @param {Object} mpdIR
 * @returns {string|undefined}
 */
export default function getHTTPUTCTimingURL(
  mpdIR: IMPDIntermediateRepresentation,
): string | undefined {
  const UTCTimingHTTP = mpdIR.children.utcTimings.filter(
    (utcTiming): utcTiming is ISupportedHttpUtcTimingScheme =>
      (utcTiming.schemeIdUri === "urn:mpeg:dash:utc:http-iso:2014" ||
        utcTiming.schemeIdUri === "urn:mpeg:dash:utc:http-xsdate:2014") &&
      utcTiming.value !== undefined,
  );

  return UTCTimingHTTP.length > 0 ? UTCTimingHTTP[0].value : undefined;
}