mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-16 16:16:40 +03:00
Joey Parrish
70 lines
2.3 KiB
JavaScript
70 lines
2.3 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.MediaKeys');
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goog.require('shaka.log');
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goog.require('shaka.polyfill.PatchedMediaKeysMs');
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goog.require('shaka.polyfill.PatchedMediaKeysNop');
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goog.require('shaka.polyfill.PatchedMediaKeysWebkit');
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goog.require('shaka.polyfill.register');
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/**
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* @namespace shaka.polyfill.MediaKeys
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*
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* @summary A polyfill to unify EME APIs across browser versions.
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*
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* The {@link https://w3c.github.io/encrypted-media/ EME spec} is still a
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* work-in-progress. As such, we need to provide a consistent API to the Shaka
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* Player. Until the spec is completely stable, the API provided by this
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* polyfill may lag behind the latest spec developments.
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*/
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/**
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* Install the polyfill if needed.
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*/
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shaka.polyfill.MediaKeys.install = function() {
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shaka.log.debug('MediaKeys.install');
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if (!window.HTMLVideoElement) {
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// Avoid errors on very old browsers.
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return;
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}
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if (navigator.requestMediaKeySystemAccess &&
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MediaKeySystemAccess.prototype.getConfiguration) {
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shaka.log.info('Using native EME as-is.');
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} else if (HTMLMediaElement.prototype.webkitGenerateKeyRequest) {
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shaka.log.info('Using webkit-prefixed EME v0.1b');
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shaka.polyfill.PatchedMediaKeysWebkit.install('webkit');
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} else if (HTMLMediaElement.prototype.generateKeyRequest) {
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shaka.log.info('Using nonprefixed EME v0.1b');
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shaka.polyfill.PatchedMediaKeysWebkit.install('');
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} else if (window.MSMediaKeys) {
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shaka.log.info('Using ms-prefixed EME v20140218');
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shaka.polyfill.PatchedMediaKeysMs.install();
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} else {
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shaka.log.info('EME not available.');
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shaka.polyfill.PatchedMediaKeysNop.install();
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}
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};
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shaka.polyfill.register(shaka.polyfill.MediaKeys.install);
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