mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-14 15:56:38 +03:00
Joey Parrish
3a552b808f
These keys cannot always be used as keys, for example on IE11 where very large init datas are found in PlayReady content. Since there should not be a large number of unique init datas, a linear suppression pass and a quadratic removeDuplicates should not be a problem in practice. Related to pull #176 Change-Id: I9dd9b5e45422544c86dd95686766625a0b336963
132 lines
3.2 KiB
JavaScript
132 lines
3.2 KiB
JavaScript
/**
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* @license
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* Copyright 2015 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.Uint8ArrayUtils');
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goog.require('shaka.util.StringUtils');
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/**
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* @namespace shaka.util.Uint8ArrayUtils
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* @export
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* @summary A set of Uint8Array utility functions.
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*/
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/**
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* Convert a Uint8Array to a raw string.
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* @param {!Uint8Array} arr
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* @return {string}
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* @export
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*/
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shaka.util.Uint8ArrayUtils.toString = function(arr) {
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return String.fromCharCode.apply(null, arr);
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};
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/**
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* Convert a raw string to a Uint8Array.
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* @param {string} str
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* @return {!Uint8Array}
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* @export
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*/
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shaka.util.Uint8ArrayUtils.fromString = function(str) {
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var result = new Uint8Array(str.length);
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for (var i = 0; i < str.length; ++i) {
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result[i] = str.charCodeAt(i);
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}
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return result;
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};
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/**
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* Convert a Uint8Array to a base64 string. The output will always use the
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* alternate encoding/alphabet also known as "base64url".
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* @param {!Uint8Array} arr
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* @param {boolean=} opt_padding If true, pad the output with equals signs.
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* Defaults to true.
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* @return {string}
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* @export
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*/
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shaka.util.Uint8ArrayUtils.toBase64 = function(arr, opt_padding) {
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return shaka.util.StringUtils.toBase64(
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shaka.util.Uint8ArrayUtils.toString(arr), opt_padding);
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};
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/**
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* Convert a base64 string to a Uint8Array. Accepts either the standard
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* alphabet or the alternate "base64url" alphabet.
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* @param {string} str
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* @return {!Uint8Array}
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* @export
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*/
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shaka.util.Uint8ArrayUtils.fromBase64 = function(str) {
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return shaka.util.Uint8ArrayUtils.fromString(
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shaka.util.StringUtils.fromBase64(str));
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};
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/**
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* Convert a hex string to a Uint8Array.
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* @param {string} str
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* @return {!Uint8Array}
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* @export
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*/
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shaka.util.Uint8ArrayUtils.fromHex = function(str) {
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var arr = new Uint8Array(str.length / 2);
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for (var i = 0; i < str.length; i += 2) {
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arr[i / 2] = window.parseInt(str.substr(i, 2), 16);
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}
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return arr;
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};
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/**
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* Convert a Uint8Array to a hex string.
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* @param {!Uint8Array} arr
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* @return {string}
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* @export
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*/
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shaka.util.Uint8ArrayUtils.toHex = function(arr) {
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var hex = '';
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for (var i = 0; i < arr.length; ++i) {
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var value = arr[i].toString(16);
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if (value.length == 1) value = '0' + value;
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hex += value;
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}
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return hex;
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};
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/**
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* Compare two Uint8Arrays for equality.
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* @param {Uint8Array} arr1
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* @param {Uint8Array} arr2
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* @return {boolean}
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*/
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shaka.util.Uint8ArrayUtils.equal = function(arr1, arr2) {
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if (!arr1 && !arr2) return true;
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if (!arr1 || !arr2) return false;
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if (arr1.length != arr2.length) return false;
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for (var i = 0; i < arr1.length; ++i) {
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if (arr1[i] != arr2[i]) return false;
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}
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return true;
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};
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