Class: shaka.media.DrmEngine

Constructor

new DrmEngine(playerInterface)

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

Members

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/1108158.
Type:
  • number
Source:

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:

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:

activeSessions_ :Map.<MediaKeySession, shaka.media.DrmEngine.SessionMetaData>

Type:
Source:

allSessionsLoaded_ :shaka.util.PublicPromise

Type:
Source:

announcedKeyStatusByKeyId_ :Map.<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:
  • Map.<string, string>
Source:

config_ :shaka.extern.DrmConfiguration

Type:
Source:

currentDrmInfo_ :shaka.extern.DrmInfo

Type:
Source:

destroyer_ :shaka.util.Destroyer

Type:
Source:

eventManager_ :shaka.util.EventManager

Type:
Source:

expirationTimer_ :shaka.util.Timer

Type:
Source:

initialized_ :boolean

Type:
  • boolean
Source:

initializedForStorage_ :boolean

Type:
  • boolean
Source:

initialRequestsSent_ :boolean

Type:
  • boolean
Source:

keyStatusByKeyId_ :Map.<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:
  • Map.<string, string>
Source:

keyStatusTimer_ :shaka.util.Timer

Type:
Source:

licenseTimeSeconds_ :number

Type:
  • number
Source:

manifestInitData_ :shaka.extern.InitDataOverride

Type:
Source:

mediaKeyMessageEvents_ :Array.<!MediaKeyMessageEvent>

Type:
  • Array.<!MediaKeyMessageEvent>
Source:

mediaKeys_ :MediaKeys

Type:
  • MediaKeys
Source:

mediaKeysAttached_ :Promise

Type:
  • Promise
Source:

playerInterface_ :shaka.media.DrmEngine.PlayerInterface

Type:
Source:

srcEquals_ :boolean

Type:
  • boolean
Source:

storedPersistentSessions_ :Map.<string, {initData: ?Uint8Array, initDataType: ?string}>

Type:
  • Map.<string, {initData: ?Uint8Array, initDataType: ?string}>
Source:

supportedTypes_ :Set.<string>

Type:
  • Set.<string>
Source:

usePersistentLicenses_ :boolean

Type:
  • boolean
Source:

video_ :HTMLMediaElement

Type:
Source:

Methods

computeMimeType_(stream, codecOverrideopt) → {string}

Parameters:
Name Type Attributes Description
stream shaka.extern.Stream
codecOverride string <optional>
Source:
Returns:
Type
string

createDrmInfoByConfigs_(keySystem, config) → {shaka.extern.DrmInfo}

Creates a DrmInfo object describing the settings used to initialize the engine.
Parameters:
Name Type Description
keySystem string
config MediaKeySystemConfiguration
Source:
Returns:
Type
shaka.extern.DrmInfo

fillInDrmInfoDefaults_(drmInfo, serversnon-null, advancedConfigsnon-null, keySystemsMappingnon-null)

Use |servers| and |advancedConfigs| to fill in missing values in drmInfo that the parser left blank. Before working with any drmInfo, it should be passed through here as it is uncommon for drmInfo to be complete when fetched from a manifest because most manifest formats do not have the required information. Also applies the key systems mapping.
Parameters:
Name Type Description
drmInfo shaka.extern.DrmInfo
servers Map.<string, string>
advancedConfigs Map.<string, shaka.extern.AdvancedDrmConfiguration>
keySystemsMapping Object.<string, string>
Source:

probeSupport() → {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>>

processDrmInfos_(drmInfosnon-null, licenseServersnon-null, encryptionSchemesnon-null, serverCertsnon-null, serverCertificateUrisnon-null, initDatasnon-null, keyIdsnon-null, keySystemUrisopt, non-null)

Extract license server, server cert, and init data from |drmInfos|, taking care to eliminate duplicates.
Parameters:
Name Type Attributes Description
drmInfos Array.<shaka.extern.DrmInfo>
licenseServers Array.<string>
encryptionSchemes Array.<string>
serverCerts Array.<!Uint8Array>
serverCertificateUris Array.<string>
initDatas Array.<!shaka.extern.InitDataOverride>
keyIds Set.<string>
keySystemUris Set.<string> <optional>
Source:

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 Map.<string, string>
Source:

areAllKeysUsable_() → {boolean}

Source:
Returns:
Type
boolean

areAllSessionsLoaded_() → {boolean}

Source:
Returns:
Type
boolean

attach(video) → {Promise}

Start processing events.
Parameters:
Name Type Description
video HTMLMediaElement
Source:
Returns:
Type
Promise

attachMediaKeys_() → {Promise}

Attach MediaKeys to the video element
Source:
Returns:
Type
Promise

checkSessionsLoaded_()

Resolves the allSessionsLoaded_ promise when all the sessions are loaded
Source:

closeOpenSessions_()

Source:

closeSession_(sessionnon-null) → {Promise}

Close a drm session while accounting for a bug in Chrome. Sometimes the Promise returned by close() never resolves. See issue #2741 and http://crbug.com/1108158.
Parameters:
Name Type Description
session MediaKeySession
Source:
Returns:
Type
Promise

configure(config, isPreloadopt)

Called by the Player to provide an updated configuration any time it changes. Must be called at least once before init().
Parameters:
Name Type Attributes Description
config shaka.extern.DrmConfiguration
isPreload function <optional>
Source:

configureClearKey_() → {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

createDrmInfoByInfos_(keySystem, drmInfosnon-null) → {shaka.extern.DrmInfo}

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

createOrLoad() → {Promise}

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

createSession(initDataType, initDatanon-null, sessionType)

Parameters:
Name Type Description
initDataType string
initData Uint8Array
sessionType string
Source:

delayLicenseRequest_() → {boolean}

Source:
Returns:
Type
boolean

destroy() → {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

destroyNow_()

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

getActiveSessionsMetadata() → {Array.<shaka.extern.DrmSessionMetadata>}

Returns the active sessions metadata
Source:
Returns:
Type
Array.<shaka.extern.DrmSessionMetadata>

getDrmInfo() → {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() → {Object.<string, string>}

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

getKeySystemAccessByConfigs_(configsByKeySystemnon-null) → {Promise.<MediaKeySystemAccess>}

Get the MediaKeySystemAccess by querying requestMediaKeySystemAccess.
Parameters:
Name Type Description
configsByKeySystem Map.<string, MediaKeySystemConfiguration> A dictionary of configs, indexed by key system, with an iteration order (insertion order) that reflects the preference for the application.
Source:
Returns:
Resolved if/when a mediaKeySystemAccess has been chosen.
Type
Promise.<MediaKeySystemAccess>

getKeySystemAccessFromVariants_(variantsnon-null, drmInfosByKeySystemnon-null) → {MediaKeySystemAccess}

Get the MediaKeySystemAccess from the decodingInfos of the variants.
Parameters:
Name Type Description
variants Array.<shaka.extern.Variant>
drmInfosByKeySystem Map.<string, !Array.<shaka.extern.DrmInfo>> A dictionary of drmInfos, indexed by key system.
Source:
Returns:
Type
MediaKeySystemAccess

getLicenseTime() → {number}

Returns the time spent on license requests during this session, or NaN.
Source:
Returns:
Type
number

getMediaKeys() → {MediaKeys}

Return the media keys created from the current mediaKeySystemAccess.
Source:
Returns:
Type
MediaKeys

getMediaKeySessions() → {Array.<MediaKeySession>}

Returns the current media key sessions.
Source:
Returns:
Type
Array.<MediaKeySession>

getSessionIds() → {Array.<string>}

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

getVariantDrmInfos_(variant) → {Array.<!shaka.extern.DrmInfo>}

Concat the audio and video drmInfos in a variant.
Parameters:
Name Type Description
variant shaka.extern.Variant
Source:
Returns:
Type
Array.<!shaka.extern.DrmInfo>

hasManifestInitData() → {boolean}

Returns true if the manifest has init data.
Source:
Returns:
Type
boolean

init_(variantsnon-null) → {Promise}

Negotiate for a key system and set up MediaKeys. This will assume that both |usePersistentLicences_| and |storedPersistentSessions_| 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) → {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

initForRemoval(keySystem, licenseServerUri, serverCertificate, audioCapabilitiesnon-null, videoCapabilitiesnon-null) → {Promise}

Initializes the drm engine for removing persistent sessions. Only the removeSession(s) methods will work correctly, creating new sessions may not work as desired.
Parameters:
Name Type Description
keySystem string
licenseServerUri string
serverCertificate Uint8Array
audioCapabilities Array.<MediaKeySystemMediaCapability>
videoCapabilities Array.<MediaKeySystemMediaCapability>
Source:
Returns:
Type
Promise

initForStorage(variantsnon-null, usePersistentLicenses) → {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

isPreload_()

Source:

loadOfflineSession_(sessionId, sessionMetadata) → {Promise.<MediaKeySession>}

Parameters:
Name Type Description
sessionId string
sessionMetadata {initData: ?Uint8Array, initDataType: ?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:

onEncryptedEvent_() → {Promise}

Processes encrypted event and start licence challenging
Source:
Returns:
Type
Promise

onError_()

Source:

onKeyStatusesChange_(eventnon-null)

Parameters:
Name Type Description
event Event
Source:

onPlay_()

Source:

onSessionMessage_(eventnon-null)

Parameters:
Name Type Description
event MediaKeyMessageEvent
Source:

parseInbandPssh(contentType, mediaSegmentnon-null) → {Promise.<void>}

Parse pssh from a media segment and announce new initData
Parameters:
Name Type Description
contentType shaka.util.ManifestParserUtils.ContentType
mediaSegment BufferSource
Source:
Returns:
Type
Promise.<void>

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:

processKeyStatusChanges_()

Source:

queryMediaKeys_(configsByKeySystemnon-null, variantsnon-null) → {Promise}

Parameters:
Name Type Description
configsByKeySystem Map.<string, MediaKeySystemConfiguration> A dictionary of configs, indexed by key system, with an iteration order (insertion order) that reflects the preference for the application.
variants Array.<shaka.extern.Variant>
Source:
Returns:
Resolved if/when a key system has been chosen.
Type
Promise

removeSession(sessionId) → {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

sendLicenseRequest_(eventnon-null)

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

setLoadSessionTimeoutTimer_(metadatanon-null)

In case there are no key statuses, consider this session loaded after a reasonable timeout. It should definitely not take 5 seconds to process a license.
Parameters:
Name Type Description
metadata shaka.media.DrmEngine.SessionMetaData
Source:

setServerCertificate() → {Promise}

Sets the server certificate based on the current DrmInfo.
Source:
Returns:
Type
Promise

setSrcEquals(valuenon-null)

Parameters:
Name Type Description
value boolean
Source:

supportsVariant(variantnon-null) → {boolean}

Check if a variant is likely to be supported by DrmEngine. This will err on the side of being too accepting and may not reject a variant that it will later fail to play.
Parameters:
Name Type Description
variant shaka.extern.Variant
Source:
Returns:
Type
boolean

unpackPlayReadyRequest_(request)

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

willSupport(contentType) → {boolean}

Check if DrmEngine (as initialized) will likely be able to support the given content type.
Parameters:
Name Type Description
contentType string
Source:
Returns:
Type
boolean

Type Definitions

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:

SessionMetaData

A record to track sessions and suppress duplicate init data.
Type:
  • {loaded: boolean, initData: Uint8Array, initDataType: ?string, oldExpiration: number, type: string, updatePromise: shaka.util.PublicPromise}
Properties:
Name Type Attributes 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.
initDataType string <nullable>
 The init data type 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.
type string The session type
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: