mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-15 16:06:41 +03:00
Theodore Abshire
59 lines
1.6 KiB
JavaScript
59 lines
1.6 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.polyfill.MathRound');
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goog.require('shaka.log');
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goog.require('shaka.polyfill');
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/**
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* @summary A polyfill to patch math round bug on some browsers.
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* @see https://stackoverflow.com/q/12830742
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*/
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shaka.polyfill.MathRound = class {
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/**
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* Install the polyfill if needed.
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*/
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static install() {
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shaka.log.debug('mathRound.install');
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const testNumber = shaka.polyfill.MathRound.MAX_ACCURATE_INPUT_ + 1;
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if (Math.round(testNumber) != testNumber) {
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shaka.log.debug('polyfill Math.round');
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const originalMathRound = Math.round;
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Math.round = (number) => {
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let result = number;
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// Due to the precision of JavaScript numbers, the number must be
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// integer.
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if (number <= shaka.polyfill.MathRound.MAX_ACCURATE_INPUT_) {
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result = originalMathRound(number);
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}
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return result;
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};
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}
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}
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};
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/**
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@const {number}
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@private
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*/
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shaka.polyfill.MathRound.MAX_ACCURATE_INPUT_ = 0x10000000000000;
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shaka.polyfill.register(shaka.polyfill.MathRound.install);
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