Class: shaka.media.DrmEngine

Constructor

new DrmEngine(playerInterface)

Parameters:
Name Type Description
playerInterface shaka.media.DrmEngine.PlayerInterface
Implements:
Source:

Members

(private, static) CLOSE_TIMEOUT_ :number

The amount of time, in seconds, we wait to consider a session closed. This allows us to work around Chrome bug https://crbug.com/690583.
Type:
  • number
Source:

(private, static) KEY_STATUS_BATCH_TIME_ :number

The amount of time, in seconds, we wait to batch up rapid key status changes. This allows us to avoid multiple expiration events in most cases.
Type:
  • number
Source:

(private, static) SESSION_LOAD_TIMEOUT_ :number

The amount of time, in seconds, we wait to consider session loaded even if no key status information is available. This allows us to support browsers/CDMs without key statuses.
Type:
  • number
Source:

(private, non-null) activeSessions_ :Array.<shaka.media.DrmEngine.ActiveSession>

Type:
Source:

(private, non-null) allSessionsLoaded_ :shaka.util.PublicPromise

Type:
Source:

(private, non-null) announcedKeyStatusByKeyId_ :Object.<string, string>

The key statuses most recently announced to other classes. We may have more up-to-date information being collected in this.keyStatusByKeyId_, which has not been batched up and released yet.
Type:
  • Object.<string, string>
Source:

(private, nullable) config_ :shakaExtern.DrmConfiguration

Type:
Source:

(private, nullable) currentDrmInfo_ :shakaExtern.DrmInfo

Type:
Source:

(private) eventManager_ :shaka.util.EventManager

Type:
Source:

(private, nullable) expirationTimer_ :shaka.util.Timer

Type:
Source:

(private, non-null) finishedDestroyingPromise_ :shaka.util.PublicPromise

A promise that will only resolve once we have finished destroying ourselves, this is used to ensure that subsequent calls to |destroy| don't resolve before the first call to |destroy|.
Type:
Source:

(private) initialized_ :boolean

Type:
  • boolean
Source:

(private) initialRequestsSent_ :boolean

Type:
  • boolean
Source:

(private) isDestroying_ :boolean

A flag to signal when have started destroying ourselves. This will: 1. Stop later calls to |destroy| from trying to destroy the already destroyed (or currently destroying) DrmEngine. 2. Stop in-progress async operations from continuing.
Type:
  • boolean
Source:

(private) isOffline_ :boolean

Type:
  • boolean
Source:

(private, non-null) keyStatusByKeyId_ :Object.<string, string>

The most recent key status information we have. We may not have announced this information to the outside world yet, which we delay to batch up changes and avoid spurious "missing key" errors.
Type:
  • Object.<string, string>
Source:

(private) keyStatusTimer_ :shaka.util.Timer

Type:
Source:

(private, non-null) mediaKeyMessageEvents_ :Array.<!MediaKeyMessageEvent>

Type:
  • Array.<!MediaKeyMessageEvent>
Source:

(private) mediaKeys_ :MediaKeys

Type:
  • MediaKeys
Source:

(private, non-null) offlineSessionIds_ :Array.<string>

Type:
  • Array.<string>
Source:

(private, nullable) onError_ :?function(!shaka.util.Error)

Type:
  • ?function(!shaka.util.Error)
Source:

(private, nullable) playerInterface_ :shaka.media.DrmEngine.PlayerInterface

Type:
Source:

(private) supportedTypes_ :Array.<string>

Type:
  • Array.<string>
Source:

(private) video_ :HTMLMediaElement

Type:
Source:

Methods

(static) areDrmCompatible(drms1non-null, drms2non-null) → {boolean}

Checks if two DrmInfos can be decrypted using the same key system. Clear content is considered compatible with every key system.
Parameters:
Name Type Description
drms1 Array.<!shakaExtern.DrmInfo>
drms2 Array.<!shakaExtern.DrmInfo>
Source:
Returns:
Type
boolean

(private, static) closeSession_(sessionnon-null) → (non-null) {Promise}

Close a drm session while accounting for a bug in Chrome. Sometimes the Promise returned by close() never resolves. See issue #1093 and https://crbug.com/690583.
Parameters:
Name Type Description
session MediaKeySession
Source:
Returns:
Type
Promise

(static) getCommonDrmInfos(drms1non-null, drms2non-null) → (non-null) {Array.<!shakaExtern.DrmInfo>}

Returns an array of drm infos that are present in both input arrays. If one of the arrays is empty, returns the other one since clear content is considered compatible with every drm info.
Parameters:
Name Type Description
drms1 Array.<!shakaExtern.DrmInfo>
drms2 Array.<!shakaExtern.DrmInfo>
Source:
Returns:
Type
Array.<!shakaExtern.DrmInfo>

(static) isBrowserSupported() → {boolean}

Returns true if the browser has recent EME APIs.
Source:
Returns:
Type
boolean

(static) probeSupport() → (non-null) {Promise.<!Object.<string, ?shakaExtern.DrmSupportType>>}

Returns a Promise to a map of EME support for well-known key systems.
Source:
Returns:
Type
Promise.<!Object.<string, ?shakaExtern.DrmSupportType>>

attach(video) → (non-null) {Promise}

Attach MediaKeys to the video element and start processing events.
Parameters:
Name Type Description
video HTMLMediaElement
Source:
Returns:
Type
Promise

configure(config)

Called by the Player to provide an updated configuration any time it changes. Must be called at least once before init().
Parameters:
Name Type Description
config shakaExtern.DrmConfiguration
Source:

(private) configureClearKey_() → (nullable) {shakaExtern.DrmInfo}

Create a DrmInfo using configured clear keys. The server URI will be a data URI which decodes to a clearkey license.
Source:
See:
Returns:
or null if clear keys are not configured.
Type
shakaExtern.DrmInfo

(private) createCurrentDrmInfo_(keySystem, config, drmInfosnon-null)

Creates a DrmInfo object describing the settings used to initialize the engine.
Parameters:
Name Type Description
keySystem string
config MediaKeySystemConfiguration
drmInfos Array.<shakaExtern.DrmInfo>
Source:

createOrLoad() → (non-null) {Promise}

Creates the sessions for the init data and waits for them to become ready.
Source:
Returns:
Type
Promise

(private) createTemporarySession_(initDataType, initDatanon-null)

Parameters:
Name Type Description
initDataType string
initData Uint8Array
Source:

(private) delayLicenseRequest_() → {boolean}

Source:
Returns:
Type
boolean

(export) destroy() → (non-null) {Promise}

Destroys the object, releasing all resources and shutting down all operations. Returns a Promise which is resolved when destruction is complete. This Promise should never be rejected.
Implements:
Source:
Returns:
Type
Promise

(private) destroyNow_()

Destroy this instance of DrmEngine. This assumes that all other checks about "if it should" have passed.
Source:

(private) fillInDrmInfoDefaults_(drmInfo)

Use this.config_ to fill in missing values in drmInfo.
Parameters:
Name Type Description
drmInfo shakaExtern.DrmInfo
Source:

getDrmInfo() → (nullable) {shakaExtern.DrmInfo}

Returns the DrmInfo that was used to initialize the current key system.
Source:
Returns:
Type
shakaExtern.DrmInfo

(private) getDrmInfosByConfig_(manifestnon-null) → {Array.<{shakaExtern.DrmInfo}>}

Returns the DrmInfo that is generated by drm configation. It activates DrmEngine if drm configs have keySystems.
Parameters:
Name Type Description
manifest shakaExtern.Manifest
Source:
Returns:
Type
Array.<{shakaExtern.DrmInfo}>

getExpiration() → {number}

Returns the next expiration time, or Infinity.
Source:
Returns:
Type
number

getKeyStatuses() → (non-null) {Object.<string, string>}

Returns the current key statuses.
Source:
Returns:
Type
Object.<string, string>

getSessionIds() → (non-null) {Array.<string>}

Returns the ID of the sessions currently active.
Source:
Returns:
Type
Array.<string>

getSupportedTypes() → {Array.<string>}

Returns an array of the media types supported by the current key system. These will be full mime types (e.g. 'video/webm; codecs="vp8"').
Source:
Returns:
Type
Array.<string>

init(manifestnon-null, offline) → (non-null) {Promise}

Negotiate for a key system and set up MediaKeys.
Parameters:
Name Type Description
manifest shakaExtern.Manifest The manifest is read for MIME type and DRM information to query EME. If the 'clearKeys' configuration is used, the manifest will be modified to force the use of Clear Key.
offline boolean True if we are storing or loading offline content.
Source:
Returns:
Resolved if/when a key system has been chosen.
Type
Promise

initialized() → {boolean}

Source:
Returns:
Type
boolean

isSupportedByKeySystem(variantnon-null) → {boolean}

Checks if a variant is compatible with the key system.
Parameters:
Name Type Description
variant shakaExtern.Variant
Source:
Returns:
Type
boolean

keySystem() → {string}

Source:
Returns:
Type
string

(private) loadOfflineSession_(sessionId) → (non-null) {Promise.<MediaKeySession>}

Parameters:
Name Type Description
sessionId string
Source:
Returns:
Type
Promise.<MediaKeySession>

newInitData(initDataType, initDatanon-null)

Called when new initialization data is encountered. If this data hasn't been seen yet, this will create a new session for it.
Parameters:
Name Type Description
initDataType string
initData Uint8Array
Source:

(private) onKeyStatusesChange_(eventnon-null)

Parameters:
Name Type Description
event Event
Source:

(private) onPlay_()

Source:

(private) onSessionMessage_(eventnon-null)

Parameters:
Name Type Description
event MediaKeyMessageEvent
Source:

(private) pollExpiration_()

Called in an interval timer to poll the expiration times of the sessions. We don't get an event from EME when the expiration updates, so we poll it so we can fire an event when it happens.
Source:

(private) prepareMediaKeyConfigs_(manifestnon-null, offline, configsByKeySystemnon-null, keySystemsInOrdernon-null)

Parameters:
Name Type Description
manifest shakaExtern.Manifest
offline boolean True if we are storing or loading offline content.
configsByKeySystem Object.<string, MediaKeySystemConfiguration> (Output parameter.) A dictionary of configs, indexed by key system.
keySystemsInOrder Array.<string> (Output parameter.) A list of key systems in the order in which we encounter them.
Source:
See:

(private) processDrmInfos_(drmInfosnon-null, licenseServersnon-null, serverCertsnon-null, initDatasnon-null, keyIdsnon-null)

Extract license server, server cert, and init data from DrmInfos, taking care to eliminate duplicates.
Parameters:
Name Type Description
drmInfos Array.<shakaExtern.DrmInfo>
licenseServers Array.<string>
serverCerts Array.<!Uint8Array>
initDatas Array.<!shakaExtern.InitDataOverride>
keyIds Array.<string>
Source:

(private) processKeyStatusChanges_()

Source:

(private) queryMediaKeys_(configsByKeySystemnon-null, keySystemsInOrdernon-null, isEncryptedContent) → (non-null) {Promise}

Parameters:
Name Type Description
configsByKeySystem Object.<string, MediaKeySystemConfiguration> A dictionary of configs, indexed by key system.
keySystemsInOrder Array.<string> A list of key systems in the order in which we should query them. On a browser which supports multiple key systems, the order may indicate a real preference for the application.
isEncryptedContent boolean True if the content is encrypted, false otherwise.
Source:
Returns:
Resolved if/when a key system has been chosen.
Type
Promise

removeSessions(sessionsnon-null) → (non-null) {Promise}

Removes the given offline sessions and deletes their data. Must call init() before this. This will wait until the 'license-release' message is handled and the resulting Promise will be rejected if there is an error with that.
Parameters:
Name Type Description
sessions Array.<string>
Source:
Returns:
Type
Promise

(private) sendLicenseRequest_(eventnon-null)

Sends a license request.
Parameters:
Name Type Description
event MediaKeyMessageEvent
Source:

(private) unpackPlayReadyRequest_(request)

Unpacks PlayReady license requests. Modifies the request object.
Parameters:
Name Type Description
request shakaExtern.Request
Source:

Type Definitions

ActiveSession

A record to track sessions and suppress duplicate init data.
Type:
  • {loaded: boolean, initData: Uint8Array, session: !MediaKeySession, oldExpiration: number, updatePromise: shaka.util.PublicPromise}
Properties:
Name Type Description
loaded boolean True once the key status has been updated (to a non-pending state). This does not mean the session is 'usable'.
initData Uint8Array The init data used to create the session.
session MediaKeySession The session object.
oldExpiration number The expiration of the session on the last check. This is used to fire an event when it changes.
updatePromise shaka.util.PublicPromise An optional Promise that will be resolved/rejected on the next update() call. This is used to track the 'license-release' message when calling remove().
Source:

PlayerInterface

Type:
Properties:
Name Type Description
netEngine shaka.net.NetworkingEngine The NetworkingEngine instance to use. The caller retains ownership.
onError function Called when an error occurs. If the error is recoverable (see shaka.util.Error) then the caller may invoke either StreamingEngine.switch*() or StreamingEngine.seeked() to attempt recovery.
onKeyStatus function Called when key status changes. The argument is a map of hex key IDs to statuses.
onExpirationUpdated function Called when the session expiration value changes.
onEvent function Called when an event occurs that should be sent to the app.
Source: