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_ :shaka.extern.DrmConfiguration

Type:
Source:

(private, nullable) currentDrmInfo_ :shaka.extern.DrmInfo

Type:
Source:

(private) destroyed_ :boolean

Type:
  • boolean
Source:

(private) eventManager_ :shaka.util.EventManager

Type:
Source:

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

Type:
Source:

(private) initialized_ :boolean

Type:
  • boolean
Source:

(private) initialRequestsSent_ :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) playerInterface_ :shaka.media.DrmEngine.PlayerInterface

Type:
Source:

(private) supportedTypes_ :Array.<string>

Type:
  • Array.<string>
Source:

(private) usePersistentLicenses_ :boolean

Type:
  • boolean
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.<!shaka.extern.DrmInfo>
drms2 Array.<!shaka.extern.DrmInfo>
Source:
Returns:
Type
boolean

(static) getCommonDrmInfos(drms1non-null, drms2non-null) → (non-null) {Array.<!shaka.extern.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.<!shaka.extern.DrmInfo>
drms2 Array.<!shaka.extern.DrmInfo>
Source:
Returns:
Type
Array.<!shaka.extern.DrmInfo>

(static) isBrowserSupported() → {boolean}

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

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

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

(static) replaceDrmInfo_(variantsnon-null, keySystemsnon-null)

Replace the drm info used in each variant in |variants| to reflect each key service in |keySystems|.
Parameters:
Name Type Description
variants Array.<shaka.extern.Variant>
keySystems Object.<string, string>
Source:

(private, static) timeout_(seconds) → (non-null) {Promise}

Create a promise that will be resolved after the given amount of time as elapsed.
Parameters:
Name Type Description
seconds number
Source:
Returns:
Type
Promise

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 shaka.extern.DrmConfiguration
Source:

(private) configureClearKey_() → (nullable) {shaka.extern.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
shaka.extern.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.<shaka.extern.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}

Request that this object be destroyed, 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) fillInDrmInfoDefaults_(drmInfo)

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

getDrmInfo() → (nullable) {shaka.extern.DrmInfo}

Returns the DrmInfo that was used to initialize the current key system.
Source:
Returns:
Type
shaka.extern.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>

(private) init_(variantsnon-null) → (non-null) {Promise}

Negotiate for a key system and set up MediaKeys. This will assume that both |usePersistentLicences_| and |offlineSessionIds_| have been properly set.
Parameters:
Name Type Description
variants Array.<shaka.extern.Variant> The variants that we expect to operate with during the drm engine's lifespan of the drm engine.
Source:
Returns:
Resolved if/when a key system has been chosen.
Type
Promise

initForPlayback(variantsnon-null, offlineSessionIdsnon-null) → (non-null) {Promise}

Initialize the drm engine for playback operations.
Parameters:
Name Type Description
variants Array.<shaka.extern.Variant> The variants that we want to support playing.
offlineSessionIds Array.<string>
Source:
Returns:
Type
Promise

initForStorage(variantsnon-null, usePersistentLicenses) → (non-null) {Promise}

Initialize the drm engine for storing and deleting stored content.
Parameters:
Name Type Description
variants Array.<shaka.extern.Variant> The variants that are going to be stored.
usePersistentLicenses boolean Whether or not persistent licenses should be requested and stored for |manifest|.
Source:
Returns:
Type
Promise

initialized() → {boolean}

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>

(private) onEncrypted_(eventnon-null)

Parameters:
Name Type Description
event MediaEncryptedEvent
Source:

(private, nullable) onError_()

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) prepareMediaKeyConfigsForVariant_(variantnon-null, configsByKeySystemnon-null, keySystemsInOrdernon-null)

Parameters:
Name Type Description
variant shaka.extern.Variant
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.<shaka.extern.DrmInfo>
licenseServers Array.<string>
serverCerts Array.<!Uint8Array>
initDatas Array.<!shaka.extern.InitDataOverride>
keyIds Array.<string>
Source:

(private) processKeyStatusChanges_()

Source:

(private) queryMediaKeys_(configsByKeySystemnon-null, keySystemsInOrdernon-null) → (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.
Source:
Returns:
Resolved if/when a key system has been chosen.
Type
Promise

removeSession(sessionId) → (non-null) {Promise}

Remove an offline session and delete it's data. This can only be called after a successful call to |init|. This will wait until the 'license-release' message is handled. The returned Promise will be rejected if there is an error releasing the license.
Parameters:
Name Type Description
sessionId string
Source:
Returns:
Type
Promise

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

Remove all given offline sessions and delete their data. This can only be called after a successful call to |init|. This will wait until the 'license-release' message is handled for each license. The returned Promise will be rejected if there is an error releasing any of the licenses.
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:

supportsVariant(variantnon-null) → {boolean}

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

(private) unpackPlayReadyRequest_(request)

Unpacks PlayReady license requests. Modifies the request object.
Parameters:
Name Type Description
request shaka.extern.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: