rx-player
Version:
Canal+ HTML5 Video Player
74 lines (71 loc) • 2.5 kB
text/typescript
/**
* 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 log from "../../../../../../log";
import isNullOrUndefined from "../../../../../../utils/is_null_or_undefined";
import type { IIndexSegment } from "../../../../utils/index_helpers";
/**
* Translate parsed `S` node into Segment compatible with this index:
* Find out the start, repeatCount and duration of each of these.
*
* @param {Object} item - parsed `S` node
* @param {Object|null} previousItem - the previously parsed Segment (related
* to the `S` node coming just before). If `null`, we're talking about the first
* segment.
* @param {Object|null} nextItem - the `S` node coming next. If `null`, we're
* talking about the last segment.
* @returns {Object|null}
*/
export default function convertElementsToIndexSegment(
item: { start?: number; repeatCount?: number; duration?: number },
previousItem: IIndexSegment | null,
nextItem: { start?: number; repeatCount?: number; duration?: number } | null,
): IIndexSegment | null {
let start = item.start;
let duration = item.duration;
const repeatCount = item.repeatCount;
if (start === undefined) {
if (previousItem === null) {
start = 0;
} else if (!isNullOrUndefined(previousItem.duration)) {
start = previousItem.start + previousItem.duration * (previousItem.repeatCount + 1);
}
}
if (
(duration === undefined || isNaN(duration)) &&
nextItem !== null &&
nextItem.start !== undefined &&
!isNaN(nextItem.start) &&
start !== undefined &&
!isNaN(start)
) {
duration = nextItem.start - start;
}
if (
start !== undefined &&
!isNaN(start) &&
duration !== undefined &&
!isNaN(duration) &&
(repeatCount === undefined || !isNaN(repeatCount))
) {
return {
start,
duration,
repeatCount: repeatCount === undefined ? 0 : repeatCount,
};
}
log.warn('DASH: A "S" Element could not have been parsed.');
return null;
}