rx-player
Version:
Canal+ HTML5 Video Player
45 lines (44 loc) • 1.55 kB
JavaScript
/**
* 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.
*/
/**
* Returns "first time of reference" from the adaptation given, considering a
* dynamic content.
* Undefined if a time could not be found.
*
* We consider the latest first time from every representations in the given
* adaptation.
* @param {Object} adaptation
* @returns {Number|undefined}
*/
export default function getFirstPositionFromAdaptation(adaptation) {
const { representations } = adaptation;
let max = null;
for (const representation of representations) {
const firstPosition = representation.index.getFirstAvailablePosition();
if (firstPosition === undefined) {
// we cannot tell
return undefined;
}
if (firstPosition !== null) {
max = max === null ? firstPosition : Math.max(max, firstPosition);
}
}
if (max === null) {
// It means that all positions were null === no segments (yet?)
return null;
}
return max;
}