shaka-player
Version:
DASH/EME video player library
61 lines (52 loc) • 1.98 kB
JavaScript
/**
* @license
* Copyright 2015 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
goog.provide('shaka.polyfill.MediaKeys');
goog.require('shaka.log');
goog.require('shaka.polyfill.PatchedMediaKeys.nop');
goog.require('shaka.polyfill.PatchedMediaKeys.v01b');
goog.require('shaka.polyfill.PatchedMediaKeys.v20140218');
/**
* @namespace shaka.polyfill.MediaKeys
* @export
*
* @summary A polyfill to unify EME APIs across browser versions.
*
* The {@link https://w3c.github.io/encrypted-media/ EME spec} is still a
* work-in-progress. As such, we need to provide a consistent API to the Shaka
* Player. Until the spec is completely stable, the API provided by this
* polyfill may lag behind the latest spec developments.
*/
/**
* Install the polyfill if needed.
* @export
*/
shaka.polyfill.MediaKeys.install = function() {
shaka.log.debug('MediaKeys.install');
if (Navigator.prototype.requestMediaKeySystemAccess &&
MediaKeySystemAccess.prototype.getConfiguration) {
shaka.log.info('Using native EME as-is.');
} else if (HTMLMediaElement.prototype.webkitGenerateKeyRequest) {
shaka.log.info('Using prefixed EME v0.1b.');
shaka.polyfill.PatchedMediaKeys.v01b.install();
} else if (window.MSMediaKeys) {
shaka.log.info('Using EME v20140218');
shaka.polyfill.PatchedMediaKeys.v20140218.install();
} else {
shaka.log.info('EME not available.');
shaka.polyfill.PatchedMediaKeys.nop.install();
}
};