mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-23 17:27:16 +03:00
Sandra Lokshina
a3d6186dd4
Currently HLS parser expects only one media tag to have a given group id. According to the spec that might not be the case. This change adds support for multiple tags with the same gruop id and insures the parser creates variants for all of them. Issue #279. Change-Id: I327e52387f7513464fc56c4b6b8d07ead689d6cc
90 lines
2.2 KiB
JavaScript
90 lines
2.2 KiB
JavaScript
/**
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* @license
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* Copyright 2016 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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goog.provide('shaka.hls.Utils');
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goog.require('shaka.util.ManifestParserUtils');
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/**
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*
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* @param {!Array.<!shaka.hls.Tag>} tags
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* @param {!string} name
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* @return {!Array.<!shaka.hls.Tag>}
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*/
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shaka.hls.Utils.filterTagsByName = function(tags, name) {
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return tags.filter(function(tag) {
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return tag.name == name;
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});
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};
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/**
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*
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* @param {!Array.<!shaka.hls.Tag>} tags
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* @param {!string} name
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* @return {?shaka.hls.Tag}
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*/
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shaka.hls.Utils.getFirstTagWithName = function(tags, name) {
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var tagsWithName = shaka.hls.Utils.filterTagsByName(tags, name);
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if (!tagsWithName.length) return null;
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return tagsWithName[0];
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};
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/**
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* Expects an array of EXT-X-MEDIA tags. Returns the first tag that
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* has given media type and group id.
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*
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* @param {!Array.<!shaka.hls.Tag>} tags
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* @param {!string} type
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* @param {!string} groupId
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* @return {!Array<!shaka.hls.Tag>}
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*/
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shaka.hls.Utils.findMediaTags = function(tags, type, groupId) {
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return tags.filter(function(tag) {
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var typeAttr = tag.getAttribute('TYPE');
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var groupIdAttr = tag.getAttribute('GROUP-ID');
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return typeAttr.value == type && groupIdAttr.value == groupId;
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});
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};
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/**
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* @param {!string} parentAbsoluteUri
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* @param {!string} uri
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* @return {!string}
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*/
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shaka.hls.Utils.constructAbsoluteUri = function(parentAbsoluteUri, uri) {
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var uris = shaka.util.ManifestParserUtils.resolveUris(
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[parentAbsoluteUri], [uri]);
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return uris[0];
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};
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/**
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* Matches a string to an HLS comment format and returns the result.
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*
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* @param {!string} line
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* @return {boolean}
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*/
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shaka.hls.Utils.isComment = function(line) {
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return /^#(?!EXT)/m.test(line);
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};
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