public
final
class
MediaCrypto
extends Object
| java.lang.Object | |
| ↳ | android.media.MediaCrypto |
MediaCrypto class can be used in conjunction with MediaCodec
to decode encrypted media data.
Crypto schemes are assigned 16 byte UUIDs,
the method isCryptoSchemeSupported(UUID) can be used to query if a given
scheme is supported on the device.
Public constructors | |
|---|---|
MediaCrypto(UUID uuid, byte[] initData)
Instantiate a MediaCrypto object using opaque, crypto scheme specific data. |
|
Public methods | |
|---|---|
static
final
boolean
|
isCryptoSchemeSupported(UUID uuid)
Query if the given scheme identified by its UUID is supported on this device. |
final
void
|
release()
|
final
boolean
|
requiresSecureDecoderComponent(String mime)
Query if the crypto scheme requires the use of a secure decoder to decode data of the given mime type. |
final
void
|
setMediaDrmSession(byte[] sessionId)
Associate a MediaDrm session with this MediaCrypto instance. |
Protected methods | |
|---|---|
void
|
finalize()
Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. |
Inherited methods | |
|---|---|
 From
class
java.lang.Object
| |
MediaCrypto (UUID uuid, byte[] initData)
Instantiate a MediaCrypto object using opaque, crypto scheme specific data.
| Parameters | |
|---|---|
uuid |
UUID:
The UUID of the crypto scheme. |
initData |
byte:
Opaque initialization data specific to the crypto scheme.
|
| Throws | |
|---|---|
MediaCryptoException |
|
boolean isCryptoSchemeSupported (UUID uuid)
Query if the given scheme identified by its UUID is supported on this device.
| Parameters | |
|---|---|
uuid |
UUID:
The UUID of the crypto scheme.
|
| Returns | |
|---|---|
boolean |
|
boolean requiresSecureDecoderComponent (String mime)
Query if the crypto scheme requires the use of a secure decoder to decode data of the given mime type.
| Parameters | |
|---|---|
mime |
String:
The mime type of the media data
|
| Returns | |
|---|---|
boolean |
|
void setMediaDrmSession (byte[] sessionId)
Associate a MediaDrm session with this MediaCrypto instance. The
MediaDrm session is used to securely load decryption keys for a
crypto scheme. The crypto keys loaded through the MediaDrm session
may be selected for use during the decryption operation performed
by queueSecureInputBuffer(int, int, MediaCodec.CryptoInfo, long, int) by specifying
their key ids in the key field.
| Parameters | |
|---|---|
sessionId |
byte:
the MediaDrm sessionId to associate with this
MediaCrypto instance |
| Throws | |
|---|---|
MediaCryptoException |
on failure to set the sessionId |
void finalize ()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
A subclass overrides the finalize method to dispose of
system resources or to perform other cleanup.
The general contract of finalize is that it is invoked
if and when the JavaTM virtual
machine has determined that there is no longer any
means by which this object can be accessed by any thread that has
not yet died, except as a result of an action taken by the
finalization of some other object or class which is ready to be
finalized. The finalize method may take any action, including
making this object available again to other threads; the usual purpose
of finalize, however, is to perform cleanup actions before
the object is irrevocably discarded. For example, the finalize method
for an object that represents an input/output connection might perform
explicit I/O transactions to break the connection before the object is
permanently discarded.
The finalize method of class Object performs no
special action; it simply returns normally. Subclasses of
Object may override this definition.
The Java programming language does not guarantee which thread will
invoke the finalize method for any given object. It is
guaranteed, however, that the thread that invokes finalize will not
be holding any user-visible synchronization locks when finalize is
invoked. If an uncaught exception is thrown by the finalize method,
the exception is ignored and finalization of that object terminates.
After the finalize method has been invoked for an object, no
further action is taken until the Java virtual machine has again
determined that there is no longer any means by which this object can
be accessed by any thread that has not yet died, including possible
actions by other objects or classes which are ready to be finalized,
at which point the object may be discarded.
The finalize method is never invoked more than once by a Java
virtual machine for any given object.
Any exception thrown by the finalize method causes
the finalization of this object to be halted, but is otherwise
ignored.
Developers