MediaDrm

This event type indicates that the licensed usage duration for keys in a session has expired. The keys are no longer valid.

This event type indicates that the app needs to request keys from a license server. The request message data is obtained using )">getKeyRequest(byte[], byte[], String, int, HashMap ) .

This event type indicates that the app needs to request a certificate from the provisioning server. The request message data is obtained using getProvisionRequest()

This event may indicate some specific vendor-defined condition, see your DRM provider documentation for details

This key request type specifies that the keys will be for offline use, they will be saved to the device for use when the device is not connected to a network.

This key request type specifies that previously saved offline keys should be released.

This key request type species that the keys will be for online use, they will not be saved to the device for subsequent use when the device is not connected to a network.

String property name: a comma-separated list of cipher and mac algorithms supported by CryptoSession. The list may be empty if the DRM engine plugin does not support CryptoSession operations.

String property name: describes the DRM engine plugin

Byte array property name: the device unique identifier is established during device provisioning and provides a means of uniquely identifying each device.

String property name: identifies the maker of the DRM engine plugin

String property name: identifies the version of the DRM engine plugin

Instantiate a MediaDrm object

Close a session on the MediaDrm object that was previously opened with openSession() .

Obtain a CryptoSession object which can be used to encrypt, decrypt, sign and verify messages or data using the session keys established for the session using methods )">getKeyRequest(byte[], byte[], String, int, HashMap ) and provideKeyResponse(byte[], byte[]) using a session key server.

A key request/response exchange occurs between the app and a license server to obtain or release keys used to decrypt encrypted content.

getKeyRequest() is used to obtain an opaque key request byte array that is delivered to the license server. The opaque key request byte array is returned in KeyRequest.data. The recommended URL to deliver the key request to is returned in KeyRequest.defaultUrl.

After the app has received the key request response from the server, it should deliver to the response to the DRM engine plugin using the method provideKeyResponse(byte[], byte[]) .

Read a DRM engine plugin byte array property value, given the property name string.

Standard fields names are PROPERTY_DEVICE_UNIQUE_ID

Read a DRM engine plugin String property value, given the property name string.

Standard fields names are: PROPERTY_VENDOR , PROPERTY_VERSION , PROPERTY_DESCRIPTION , PROPERTY_ALGORITHMS

A provision request/response exchange occurs between the app and a provisioning server to retrieve a device certificate. If provisionining is required, the EVENT_PROVISION_REQUIRED event will be sent to the event handler. getProvisionRequest is used to obtain the opaque provision request byte array that should be delivered to the provisioning server. The provision request byte array is returned in ProvisionRequest.data. The recommended URL to deliver the provision request to is returned in ProvisionRequest.defaultUrl.

A means of enforcing limits on the number of concurrent streams per subscriber across devices is provided via SecureStop. This is achieved by securely monitoring the lifetime of sessions.

Information from the server related to the current playback session is written to persistent storage on the device when each MediaCrypto object is created.

In the normal case, playback will be completed, the session destroyed and the Secure Stops will be queried. The app queries secure stops and forwards the secure stop message to the server which verifies the signature and notifies the server side database that the session destruction has been confirmed. The persisted record on the client is only removed after positive confirmation that the server received the message using releaseSecureStops().

Query if the given scheme identified by its UUID is supported on this device, and whether the drm plugin is able to handle the media container format specified by mimeType.

Query if the given scheme identified by its UUID is supported on this device.

Open a new session with the MediaDrm object. A session ID is returned.

A key response is received from the license server by the app, then it is provided to the DRM engine plugin using provideKeyResponse. When the response is for an offline key request, a keySetId is returned that can be used to later restore the keys to a new session with the method restoreKeys(byte[], byte[]) . When the response is for a streaming or release request, null is returned.

After a provision response is received by the app, it is provided to the DRM engine plugin using this method.

Request an informative description of the key status for the session. The status is in the form of {name, value} pairs. Since DRM license policies vary by vendor, the specific status field names are determined by each DRM vendor. Refer to your DRM provider documentation for definitions of the field names for a particular DRM engine plugin.

Process the SecureStop server response message ssRelease. After authenticating the message, remove the SecureStops identified in the response.

Remove the current keys from a session.

Restore persisted offline keys into a new session. keySetId identifies the keys to load, obtained from a prior call to provideKeyResponse(byte[], byte[]) .

Register a callback to be invoked when an event occurs

Set a DRM engine plugin byte array property value.

Set a DRM engine plugin String property value.

Invoked when the garbage collector has detected that this instance is no longer reachable. The default implementation does nothing, but this method can be overridden to free resources.

Note that objects that override finalize are significantly more expensive than objects that don't. Finalizers may be run a long time after the object is no longer reachable, depending on memory pressure, so it's a bad idea to rely on them for cleanup. Note also that finalizers are run on a single VM-wide finalizer thread, so doing blocking work in a finalizer is a bad idea. A finalizer is usually only necessary for a class that has a native peer and needs to call a native method to destroy that peer. Even then, it's better to provide an explicit close method (and implement Closeable ), and insist that callers manually dispose of instances. This works well for something like files, but less well for something like a BigInteger where typical calling code would have to deal with lots of temporaries. Unfortunately, code that creates lots of temporaries is the worst kind of code from the point of view of the single finalizer thread.

If you must use finalizers, consider at least providing your own ReferenceQueue and having your own thread process that queue.

Unlike constructors, finalizers are not automatically chained. You are responsible for calling super.finalize() yourself.

Uncaught exceptions thrown by finalizers are ignored and do not terminate the finalizer thread. See Effective Java Item 7, "Avoid finalizers" for more.