/**
* @license
* Copyright 2016 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.PatchedMediaKeysMs');
goog.require('goog.asserts');
goog.require('shaka.log');
goog.require('shaka.polyfill.register');
goog.require('shaka.util.ArrayUtils');
goog.require('shaka.util.EventManager');
goog.require('shaka.util.FakeEvent');
goog.require('shaka.util.FakeEventTarget');
goog.require('shaka.util.Pssh');
goog.require('shaka.util.PublicPromise');
goog.require('shaka.util.Uint8ArrayUtils');
/**
* @namespace shaka.polyfill.PatchedMediaKeysMs
*
* @summary A polyfill to implement
* {@link http://goo.gl/blgtZZ EME draft 12 March 2015}
* on top of ms-prefixed
* {@link http://www.w3.org/TR/2014/WD-encrypted-media-20140218/ EME v20140218}.
*/
/**
* Installs the polyfill if needed.
*/
shaka.polyfill.PatchedMediaKeysMs.install = function() {
if (!window.HTMLVideoElement || !window.MSMediaKeys ||
(navigator.requestMediaKeySystemAccess &&
MediaKeySystemAccess.prototype.getConfiguration)) {
return;
}
shaka.log.info('Using ms-prefixed EME v20140218');
// Alias
const PatchedMediaKeysMs = shaka.polyfill.PatchedMediaKeysMs;
// Construct a fake key ID. This is not done at load-time to avoid exceptions
// on unsupported browsers. This particular fake key ID was suggested in
// w3c/encrypted-media#32.
PatchedMediaKeysMs.MediaKeyStatusMap.KEY_ID_ = (new Uint8Array([0])).buffer;
// Delete mediaKeys to work around strict mode compatibility issues.
delete HTMLMediaElement.prototype['mediaKeys'];
// Work around read-only declaration for mediaKeys by using a string.
HTMLMediaElement.prototype['mediaKeys'] = null;
HTMLMediaElement.prototype.setMediaKeys = PatchedMediaKeysMs.setMediaKeys;
// Install patches
window.MediaKeys = PatchedMediaKeysMs.MediaKeys;
window.MediaKeySystemAccess = PatchedMediaKeysMs.MediaKeySystemAccess;
navigator.requestMediaKeySystemAccess =
PatchedMediaKeysMs.requestMediaKeySystemAccess;
};
/**
* An implementation of navigator.requestMediaKeySystemAccess.
* Retrieves a MediaKeySystemAccess object.
*
* @this {!Navigator}
* @param {string} keySystem
* @param {!Array.<!MediaKeySystemConfiguration>} supportedConfigurations
* @return {!Promise.<!MediaKeySystemAccess>}
*/
shaka.polyfill.PatchedMediaKeysMs.requestMediaKeySystemAccess =
function(keySystem, supportedConfigurations) {
shaka.log.debug('PatchedMediaKeysMs.requestMediaKeySystemAccess');
goog.asserts.assert(this == navigator,
'bad "this" for requestMediaKeySystemAccess');
// Alias.
const PatchedMediaKeysMs = shaka.polyfill.PatchedMediaKeysMs;
try {
let access = new PatchedMediaKeysMs.MediaKeySystemAccess(
keySystem, supportedConfigurations);
return Promise.resolve(/** @type {!MediaKeySystemAccess} */ (access));
} catch (exception) {
return Promise.reject(exception);
}
};
/**
* An implementation of MediaKeySystemAccess.
*
* @constructor
* @struct
* @param {string} keySystem
* @param {!Array.<!MediaKeySystemConfiguration>} supportedConfigurations
* @implements {MediaKeySystemAccess}
* @throws {Error} if the key system is not supported.
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeySystemAccess =
function(keySystem, supportedConfigurations) {
shaka.log.debug('PatchedMediaKeysMs.MediaKeySystemAccess');
/** @type {string} */
this.keySystem = keySystem;
/** @private {!MediaKeySystemConfiguration} */
this.configuration_;
let allowPersistentState = false;
let success = false;
for (let i = 0; i < supportedConfigurations.length; ++i) {
let cfg = supportedConfigurations[i];
// Create a new config object and start adding in the pieces which we
// find support for. We will return this from getConfiguration() if asked.
/** @type {!MediaKeySystemConfiguration} */
let newCfg = {
'audioCapabilities': [],
'videoCapabilities': [],
// It is technically against spec to return these as optional, but we
// don't truly know their values from the prefixed API:
'persistentState': 'optional',
'distinctiveIdentifier': 'optional',
// Pretend the requested init data types are supported, since we don't
// really know that either:
'initDataTypes': cfg.initDataTypes,
'sessionTypes': ['temporary'],
'label': cfg.label
};
// PatchedMediaKeysMs tests for key system availability through
// MSMediaKeys.isTypeSupported
let ranAnyTests = false;
if (cfg.audioCapabilities) {
for (let j = 0; j < cfg.audioCapabilities.length; ++j) {
let cap = cfg.audioCapabilities[j];
if (cap.contentType) {
ranAnyTests = true;
let contentType = cap.contentType.split(';')[0];
if (MSMediaKeys.isTypeSupported(this.keySystem, contentType)) {
newCfg.audioCapabilities.push(cap);
success = true;
}
}
}
}
if (cfg.videoCapabilities) {
for (let j = 0; j < cfg.videoCapabilities.length; ++j) {
let cap = cfg.videoCapabilities[j];
if (cap.contentType) {
ranAnyTests = true;
let contentType = cap.contentType.split(';')[0];
if (MSMediaKeys.isTypeSupported(this.keySystem, contentType)) {
newCfg.videoCapabilities.push(cap);
success = true;
}
}
}
}
if (!ranAnyTests) {
// If no specific types were requested, we check all common types to find
// out if the key system is present at all.
success = MSMediaKeys.isTypeSupported(this.keySystem, 'video/mp4');
}
if (cfg.persistentState == 'required') {
if (allowPersistentState) {
newCfg.persistentState = 'required';
newCfg.sessionTypes = ['persistent-license'];
} else {
success = false;
}
}
if (success) {
this.configuration_ = newCfg;
return;
}
} // for each cfg in supportedConfigurations
// As per the spec, this should be a DOMException, but there is not a public
// constructor for this.
let unsupportedKeySystemError = new Error('Unsupported keySystem');
unsupportedKeySystemError.name = 'NotSupportedError';
unsupportedKeySystemError.code = DOMException.NOT_SUPPORTED_ERR;
throw unsupportedKeySystemError;
};
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeySystemAccess.prototype.
createMediaKeys = function() {
shaka.log.debug('PatchedMediaKeysMs.MediaKeySystemAccess.createMediaKeys');
// Alias
const PatchedMediaKeysMs = shaka.polyfill.PatchedMediaKeysMs;
let mediaKeys = new PatchedMediaKeysMs.MediaKeys(this.keySystem);
return Promise.resolve(/** @type {!MediaKeys} */ (mediaKeys));
};
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeySystemAccess.prototype.
getConfiguration = function() {
shaka.log.debug('PatchedMediaKeysMs.MediaKeySystemAccess.getConfiguration');
return this.configuration_;
};
/**
* An implementation of HTMLMediaElement.prototype.setMediaKeys.
* Attaches a MediaKeys object to the media element.
*
* @this {!HTMLMediaElement}
* @param {MediaKeys} mediaKeys
* @return {!Promise}
*/
shaka.polyfill.PatchedMediaKeysMs.setMediaKeys = function(mediaKeys) {
shaka.log.debug('PatchedMediaKeysMs.setMediaKeys');
goog.asserts.assert(this instanceof HTMLMediaElement,
'bad "this" for setMediaKeys');
// Alias
const PatchedMediaKeysMs = shaka.polyfill.PatchedMediaKeysMs;
let newMediaKeys =
/** @type {shaka.polyfill.PatchedMediaKeysMs.MediaKeys} */ (
mediaKeys);
let oldMediaKeys =
/** @type {shaka.polyfill.PatchedMediaKeysMs.MediaKeys} */ (
this.mediaKeys);
if (oldMediaKeys && oldMediaKeys != newMediaKeys) {
goog.asserts.assert(oldMediaKeys instanceof PatchedMediaKeysMs.MediaKeys,
'non-polyfill instance of oldMediaKeys');
// Have the old MediaKeys stop listening to events on the video tag.
oldMediaKeys.setMedia(null);
}
delete this['mediaKeys']; // in case there is an existing getter
this['mediaKeys'] = mediaKeys; // work around read-only declaration
if (newMediaKeys) {
goog.asserts.assert(newMediaKeys instanceof PatchedMediaKeysMs.MediaKeys,
'non-polyfill instance of newMediaKeys');
return newMediaKeys.setMedia(this);
}
return Promise.resolve();
};
/**
* An implementation of MediaKeys.
*
* @constructor
* @struct
* @param {string} keySystem
* @implements {MediaKeys}
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeys = function(keySystem) {
shaka.log.debug('PatchedMediaKeysMs.MediaKeys');
/** @private {!MSMediaKeys} */
this.nativeMediaKeys_ = new MSMediaKeys(keySystem);
/** @private {!shaka.util.EventManager} */
this.eventManager_ = new shaka.util.EventManager();
};
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeys.prototype.
createSession = function(opt_sessionType) {
shaka.log.debug('PatchedMediaKeysMs.MediaKeys.createSession');
let sessionType = opt_sessionType || 'temporary';
// For now, only the 'temporary' type is supported.
if (sessionType != 'temporary') {
throw new TypeError('Session type ' + opt_sessionType +
' is unsupported on this platform.');
}
// Alias
const PatchedMediaKeysMs = shaka.polyfill.PatchedMediaKeysMs;
return new PatchedMediaKeysMs.MediaKeySession(
this.nativeMediaKeys_, sessionType);
};
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeys.prototype.
setServerCertificate = function(serverCertificate) {
shaka.log.debug('PatchedMediaKeysMs.MediaKeys.setServerCertificate');
// There is no equivalent in PatchedMediaKeysMs, so return failure.
return Promise.resolve(false);
};
/**
* @param {HTMLMediaElement} media
* @protected
* @return {!Promise}
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeys.prototype.
setMedia = function(media) {
// Alias
const PatchedMediaKeysMs = shaka.polyfill.PatchedMediaKeysMs;
// Remove any old listeners.
this.eventManager_.removeAll();
// It is valid for media to be null; null is used to flag that event handlers
// need to be cleaned up.
if (!media) {
return Promise.resolve();
}
// Intercept and translate these prefixed EME events.
this.eventManager_.listen(media, 'msneedkey',
/** @type {shaka.util.EventManager.ListenerType} */
(PatchedMediaKeysMs.onMsNeedKey_));
let self = this;
function setMediaKeysDeferred() {
media.msSetMediaKeys(self.nativeMediaKeys_);
media.removeEventListener('loadedmetadata', setMediaKeysDeferred);
}
// Wrap native HTMLMediaElement.msSetMediaKeys with a Promise.
try {
// IE11/Edge requires that readyState >=1 before mediaKeys can be set, so
// check this and wait for loadedmetadata if we are not in the correct state
if (media.readyState >= 1) {
media.msSetMediaKeys(this.nativeMediaKeys_);
} else {
media.addEventListener('loadedmetadata', setMediaKeysDeferred);
}
return Promise.resolve();
} catch (exception) {
return Promise.reject(exception);
}
};
/**
* An implementation of MediaKeySession.
*
* @constructor
* @struct
* @param {MSMediaKeys} nativeMediaKeys
* @param {string} sessionType
* @implements {MediaKeySession}
* @extends {shaka.util.FakeEventTarget}
*/
shaka.polyfill.PatchedMediaKeysMs.
MediaKeySession = function(nativeMediaKeys, sessionType) {
shaka.log.debug('PatchedMediaKeysMs.MediaKeySession');
shaka.util.FakeEventTarget.call(this);
// The native MediaKeySession, which will be created in generateRequest.
/** @private {MSMediaKeySession} */
this.nativeMediaKeySession_ = null;
/** @private {MSMediaKeys} */
this.nativeMediaKeys_ = nativeMediaKeys;
// Promises that are resolved later
/** @private {shaka.util.PublicPromise} */
this.generateRequestPromise_ = null;
/** @private {shaka.util.PublicPromise} */
this.updatePromise_ = null;
/** @private {!shaka.util.EventManager} */
this.eventManager_ = new shaka.util.EventManager();
/** @type {string} */
this.sessionId = '';
/** @type {number} */
this.expiration = NaN;
/** @type {!shaka.util.PublicPromise} */
this.closed = new shaka.util.PublicPromise();
/** @type {!shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap} */
this.keyStatuses =
new shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap();
};
goog.inherits(shaka.polyfill.PatchedMediaKeysMs.MediaKeySession,
shaka.util.FakeEventTarget);
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeySession.prototype.
generateRequest = function(initDataType, initData) {
shaka.log.debug('PatchedMediaKeysMs.MediaKeySession.generateRequest');
this.generateRequestPromise_ = new shaka.util.PublicPromise();
try {
// This EME spec version requires a MIME content type as the 1st param
// to createSession, but doesn't seem to matter what the value is.
// NOTE: IE11 takes either Uint8Array or ArrayBuffer, but Edge 12 only
// accepts Uint8Array.
this.nativeMediaKeySession_ = this.nativeMediaKeys_
.createSession('video/mp4', new Uint8Array(initData), null);
// Attach session event handlers here.
this.eventManager_.listen(this.nativeMediaKeySession_, 'mskeymessage',
/** @type {shaka.util.EventManager.ListenerType} */
(this.onMsKeyMessage_.bind(this)));
this.eventManager_.listen(this.nativeMediaKeySession_, 'mskeyadded',
/** @type {shaka.util.EventManager.ListenerType} */
(this.onMsKeyAdded_.bind(this)));
this.eventManager_.listen(this.nativeMediaKeySession_, 'mskeyerror',
/** @type {shaka.util.EventManager.ListenerType} */
(this.onMsKeyError_.bind(this)));
this.updateKeyStatus_('status-pending');
} catch (exception) {
this.generateRequestPromise_.reject(exception);
}
return this.generateRequestPromise_;
};
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeySession.prototype.
load = function() {
shaka.log.debug('PatchedMediaKeysMs.MediaKeySession.load');
return Promise.reject(new Error('MediaKeySession.load not yet supported'));
};
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeySession.prototype.
update = function(response) {
shaka.log.debug('PatchedMediaKeysMs.MediaKeySession.update');
this.updatePromise_ = new shaka.util.PublicPromise();
try {
// Pass through to the native session.
// NOTE: IE11 takes either Uint8Array or ArrayBuffer, but Edge 12 only
// accepts Uint8Array.
this.nativeMediaKeySession_.update(new Uint8Array(response));
} catch (exception) {
this.updatePromise_.reject(exception);
}
return this.updatePromise_;
};
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeySession.prototype.
close = function() {
shaka.log.debug('PatchedMediaKeysMs.MediaKeySession.close');
try {
// Pass through to the native session.
// NOTE: IE seems to have a spec discrepancy here - v2010218 should have
// MediaKeySession.release, but actually uses "close". The next version
// of the spec is the initial Promise based one, so it's not the target spec
// either.
this.nativeMediaKeySession_.close();
this.closed.resolve();
this.eventManager_.removeAll();
} catch (exception) {
this.closed.reject(exception);
}
return this.closed;
};
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeySession.prototype.
remove = function() {
shaka.log.debug('PatchedMediaKeysMs.MediaKeySession.remove');
return Promise.reject(new Error('MediaKeySession.remove is only ' +
'applicable for persistent licenses, which are not supported on ' +
'this platform'));
};
/**
* Handler for the native media elements msNeedKey event.
*
* @this {!HTMLMediaElement}
* @param {!MediaKeyEvent} event
* @private
*/
shaka.polyfill.PatchedMediaKeysMs.onMsNeedKey_ = function(event) {
shaka.log.debug('PatchedMediaKeysMs.onMsNeedKey_', event);
// Alias
const PatchedMediaKeysMs = shaka.polyfill.PatchedMediaKeysMs;
// NOTE: Because "this" is a real EventTarget, on IE, the event we dispatch
// here must also be a real Event.
let event2 = /** @type {!CustomEvent} */(document.createEvent('CustomEvent'));
event2.initCustomEvent('encrypted', false, false, null);
event2.initDataType = 'cenc';
event2.initData = PatchedMediaKeysMs.NormaliseInitData_(event.initData);
this.dispatchEvent(event2);
};
/**
* Normalise the initData array. This is to apply browser specific work-arounds,
* e.g. removing duplicates which appears to occur intermittently when the
* native msneedkey event fires (i.e. event.initData contains dupes).
*
* @param {?Uint8Array} initData
* @private
* @return {?Uint8Array}
*/
shaka.polyfill.PatchedMediaKeysMs.
NormaliseInitData_ = function(initData) {
if (!initData) {
return initData;
}
let pssh = new shaka.util.Pssh(initData);
// If there is only a single pssh, return the original array.
if (pssh.dataBoundaries.length <= 1) {
return initData;
}
let unfilteredInitDatas = [];
for (let i = 0; i < pssh.dataBoundaries.length; i++) {
let currPssh = initData.subarray(
pssh.dataBoundaries[i].start,
pssh.dataBoundaries[i].end + 1); // End is exclusive, hence the +1.
unfilteredInitDatas.push(currPssh);
}
// Dedupe psshData.
let dedupedInitDatas = shaka.util.ArrayUtils.removeDuplicates(
unfilteredInitDatas,
shaka.polyfill.PatchedMediaKeysMs.compareInitDatas_);
let targetLength = 0;
for (let i = 0; i < dedupedInitDatas.length; i++) {
targetLength += dedupedInitDatas[i].length;
}
// Flatten the array of Uint8Arrays back into a single Uint8Array.
let normalisedInitData = new Uint8Array(targetLength);
let offset = 0;
for (let i = 0; i < dedupedInitDatas.length; i++) {
normalisedInitData.set(dedupedInitDatas[i], offset);
offset += dedupedInitDatas[i].length;
}
return normalisedInitData;
};
/**
* @param {!Uint8Array} initDataA
* @param {!Uint8Array} initDataB
* @return {boolean}
* @private
*/
shaka.polyfill.PatchedMediaKeysMs.compareInitDatas_ =
function(initDataA, initDataB) {
return shaka.util.Uint8ArrayUtils.equal(initDataA, initDataB);
};
/**
* Handler for the native keymessage event on MSMediaKeySession.
*
* @param {!MediaKeyEvent} event
* @private
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeySession.prototype.
onMsKeyMessage_ = function(event) {
shaka.log.debug('PatchedMediaKeysMs.onMsKeyMessage_', event);
// We can now resolve this.generateRequestPromise, which should be non-null.
goog.asserts.assert(this.generateRequestPromise_,
'generateRequestPromise_ not set in onMsKeyMessage_');
if (this.generateRequestPromise_) {
this.generateRequestPromise_.resolve();
this.generateRequestPromise_ = null;
}
let isNew = this.keyStatuses.getStatus() == undefined;
let event2 = new shaka.util.FakeEvent('message', {
messageType: isNew ? 'licenserequest' : 'licenserenewal',
message: event.message.buffer
});
this.dispatchEvent(event2);
};
/**
* Handler for the native keyadded event on MSMediaKeySession.
*
* @param {!MediaKeyEvent} event
* @private
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeySession.prototype.
onMsKeyAdded_ = function(event) {
shaka.log.debug('PatchedMediaKeysMs.onMsKeyAdded_', event);
// PlayReady's concept of persistent licenses makes emulation difficult here.
// A license policy can say that the license persists, which causes the CDM to
// store it for use in a later session. The result is that in IE11, the CDM
// fires 'mskeyadded' without ever firing 'mskeymessage'.
if (this.generateRequestPromise_) {
shaka.log.debug('Simulating completion for a PR persistent license.');
goog.asserts.assert(!this.updatePromise_,
'updatePromise_ and generateRequestPromise_ set in onMsKeyAdded_');
this.updateKeyStatus_('usable');
this.generateRequestPromise_.resolve();
this.generateRequestPromise_ = null;
return;
}
// We can now resolve this.updatePromise, which should be non-null.
goog.asserts.assert(this.updatePromise_,
'updatePromise_ not set in onMsKeyAdded_');
if (this.updatePromise_) {
this.updateKeyStatus_('usable');
this.updatePromise_.resolve();
this.updatePromise_ = null;
}
};
/**
* Handler for the native keyerror event on MSMediaKeySession.
*
* @param {!MediaKeyEvent} event
* @private
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeySession.prototype.
onMsKeyError_ = function(event) {
shaka.log.debug('PatchedMediaKeysMs.onMsKeyError_', event);
let error = new Error('EME PatchedMediaKeysMs key error');
error.errorCode = this.nativeMediaKeySession_.error;
if (this.generateRequestPromise_ != null) {
this.generateRequestPromise_.reject(error);
this.generateRequestPromise_ = null;
} else if (this.updatePromise_ != null) {
this.updatePromise_.reject(error);
this.updatePromise_ = null;
} else {
// Unexpected error - map native codes to standardised key statuses.
// Possible values of this.nativeMediaKeySession_.error.code:
// MS_MEDIA_KEYERR_UNKNOWN = 1
// MS_MEDIA_KEYERR_CLIENT = 2
// MS_MEDIA_KEYERR_SERVICE = 3
// MS_MEDIA_KEYERR_OUTPUT = 4
// MS_MEDIA_KEYERR_HARDWARECHANGE = 5
// MS_MEDIA_KEYERR_DOMAIN = 6
switch (this.nativeMediaKeySession_.error.code) {
case MSMediaKeyError.MS_MEDIA_KEYERR_OUTPUT:
case MSMediaKeyError.MS_MEDIA_KEYERR_HARDWARECHANGE:
this.updateKeyStatus_('output-not-allowed');
break;
default:
this.updateKeyStatus_('internal-error');
break;
}
}
};
/**
* Updates key status and dispatch a 'keystatuseschange' event.
*
* @param {string} status
* @private
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeySession.prototype.
updateKeyStatus_ = function(status) {
this.keyStatuses.setStatus(status);
let event = new shaka.util.FakeEvent('keystatuseschange');
this.dispatchEvent(event);
};
/**
* An implementation of MediaKeyStatusMap.
* This fakes a map with a single key ID.
*
* @constructor
* @struct
* @implements {MediaKeyStatusMap}
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap = function() {
/**
* @type {number}
*/
this.size = 0;
/**
* @private {string|undefined}
*/
this.status_ = undefined;
};
/**
* @const {!ArrayBuffer}
* @private
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap.KEY_ID_;
/**
* An internal method used by the session to set key status.
* @param {string|undefined} status
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap.prototype.
setStatus = function(status) {
this.size = status == undefined ? 0 : 1;
this.status_ = status;
};
/**
* An internal method used by the session to get key status.
* @return {string|undefined}
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap.prototype.
getStatus = function() {
return this.status_;
};
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap.prototype.
forEach = function(fn) {
if (this.status_) {
let fakeKeyId =
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap.KEY_ID_;
fn(this.status_, fakeKeyId);
}
};
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap.prototype.
get = function(keyId) {
if (this.has(keyId)) {
return this.status_;
}
return undefined;
};
/** @override */
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap.prototype.
has = function(keyId) {
let fakeKeyId =
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap.KEY_ID_;
if (this.status_ &&
shaka.util.Uint8ArrayUtils.equal(
new Uint8Array(keyId), new Uint8Array(fakeKeyId))) {
return true;
}
return false;
};
/**
* @suppress {missingReturn}
* @override
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap.prototype.
entries = function() {
goog.asserts.assert(false, 'Not used! Provided only for the compiler.');
};
/**
* @suppress {missingReturn}
* @override
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap.prototype.
keys = function() {
goog.asserts.assert(false, 'Not used! Provided only for the compiler.');
};
/**
* @suppress {missingReturn}
* @override
*/
shaka.polyfill.PatchedMediaKeysMs.MediaKeyStatusMap.prototype.
values = function() {
goog.asserts.assert(false, 'Not used! Provided only for the compiler.');
};
shaka.polyfill.register(shaka.polyfill.PatchedMediaKeysMs.install);