public final class MediaCrypto extends Object
MediaCodec
to decode encrypted media data.
Crypto schemes are assigned 16 byte UUIDs,
the method isCryptoSchemeSupported(java.util.UUID)
can be used to query if a given
scheme is supported on the device.Constructor and Description |
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MediaCrypto(UUID uuid,
byte[] initData)
Instantiate a MediaCrypto object using opaque, crypto scheme specific
data.
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Modifier and Type | Method and Description |
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protected void |
finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
|
static boolean |
isCryptoSchemeSupported(UUID uuid)
Query if the given scheme identified by its UUID is supported on
this device.
|
void |
release() |
boolean |
requiresSecureDecoderComponent(String mime)
Query if the crypto scheme requires the use of a secure decoder
to decode data of the given mime type.
|
void |
setMediaDrmSession(byte[] sessionId)
Associate a MediaDrm session with this MediaCrypto instance.
|
public MediaCrypto(UUID uuid, byte[] initData) throws MediaCryptoException
uuid
- The UUID of the crypto scheme.initData
- Opaque initialization data specific to the crypto scheme.MediaCryptoException
public static final boolean isCryptoSchemeSupported(UUID uuid)
uuid
- The UUID of the crypto scheme.public final boolean requiresSecureDecoderComponent(String mime)
mime
- The mime type of the media datapublic final void setMediaDrmSession(byte[] sessionId) throws MediaCryptoException
MediaCodec.queueSecureInputBuffer(int, int, android.media.MediaCodec.CryptoInfo, long, int)
by specifying
their key ids in the MediaCodec.CryptoInfo.key
field.sessionId
- the MediaDrm sessionId to associate with this
MediaCrypto instanceMediaCryptoException
- on failure to set the sessionIdprotected void finalize()
Object
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.
public final void release()