mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-26 17:46:26 +03:00
Aaron Vaage
8bacf168db
We need to find the current period for a given time in two places: streaming engine and period observer. This change takes the method used by streaming engine and the method used by period observer and merges them into a common method in |shaka.util.Periods|. Change-Id: I4f681ceaef38bf2118fb4b87fe4961fddd196707
70 lines
1.9 KiB
JavaScript
70 lines
1.9 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.util.Periods');
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/**
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* This is a collection of period-focused utility methods.
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*
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* @final
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*/
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shaka.util.Periods = class {
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/**
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* Get all the variants across all periods.
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*
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* @param {!Iterable.<shaka.extern.Period>} periods
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* @return {!Array.<shaka.extern.Variant>}
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*/
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static getAllVariantsFrom(periods) {
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const found = [];
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for (const period of periods) {
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for (const variant of period.variants) {
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found.push(variant);
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}
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}
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return found;
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}
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/**
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* Find our best guess at which period contains the given time. If
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* |timeInSeconds| starts before the first period, then |null| will be
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* returned.
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*
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* @param {!Iterable.<shaka.extern.Period>} periods
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* @param {number} timeInSeconds
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* @return {?shaka.extern.Period}
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*/
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static findPeriodForTime(periods, timeInSeconds) {
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let bestGuess = null;
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// Go period-by-period and see if the period started before our current
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// time. If so, we could be in that period. Since periods are supposed to be
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// in order by start time, we can allow later periods to override our best
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// guess.
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for (const period of periods) {
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if (timeInSeconds >= period.startTime) {
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bestGuess = period;
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}
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}
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return bestGuess;
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}
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};
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