public
static
final
class
MediaCodec.CryptoInfo
extends Object
| java.lang.Object | |
| ↳ | android.media.MediaCodec.CryptoInfo |
Metadata describing the structure of a (at least partially) encrypted input sample. A buffer's data is considered to be partitioned into "subSamples", each subSample starts with a (potentially empty) run of plain, unencrypted bytes followed by a (also potentially empty) run of encrypted bytes. If pattern encryption applies, each of the latter runs is encrypted only partly, according to a repeating pattern of "encrypt" and "skip" blocks. numBytesOfClearData can be null to indicate that all data is encrypted. This information encapsulates per-sample metadata as outlined in ISO/IEC FDIS 23001-7:2011 "Common encryption in ISO base media file format files".
Nested classes | |
|---|---|
class |
MediaCodec.CryptoInfo.Pattern
Metadata describing an encryption pattern for the protected bytes in a subsample. |
Fields | |
|---|---|
public
byte[] |
iv
A 16-byte initialization vector |
public
byte[] |
key
A 16-byte key id |
public
int |
mode
The type of encryption that has been applied,
see |
public
int[] |
numBytesOfClearData
The number of leading unencrypted bytes in each subSample. |
public
int[] |
numBytesOfEncryptedData
The number of trailing encrypted bytes in each subSample. |
public
int |
numSubSamples
The number of subSamples that make up the buffer's contents. |
Public constructors | |
|---|---|
MediaCodec.CryptoInfo()
|
|
Public methods | |
|---|---|
void
|
set(int newNumSubSamples, int[] newNumBytesOfClearData, int[] newNumBytesOfEncryptedData, byte[] newKey, byte[] newIV, int newMode)
Set the subsample count, clear/encrypted sizes, key, IV and mode fields of
a |
void
|
setPattern(MediaCodec.CryptoInfo.Pattern newPattern)
Set the encryption pattern on a |
String
|
toString()
Returns a string representation of the object. |
Inherited methods | |
|---|---|
 From
class
java.lang.Object
| |
int mode
The type of encryption that has been applied,
see CRYPTO_MODE_UNENCRYPTED, CRYPTO_MODE_AES_CTR
and CRYPTO_MODE_AES_CBC
int[] numBytesOfClearData
The number of leading unencrypted bytes in each subSample.
int[] numBytesOfEncryptedData
The number of trailing encrypted bytes in each subSample.
int numSubSamples
The number of subSamples that make up the buffer's contents.
Developers
void set (int newNumSubSamples,
int[] newNumBytesOfClearData,
int[] newNumBytesOfEncryptedData,
byte[] newKey,
byte[] newIV,
int newMode)
Set the subsample count, clear/encrypted sizes, key, IV and mode fields of
a MediaCodec.CryptoInfo instance.
| Parameters | |
|---|---|
newNumSubSamples |
int
|
newNumBytesOfClearData |
int
|
newNumBytesOfEncryptedData |
int
|
newKey |
byte
|
newIV |
byte
|
newMode |
int
|
void setPattern (MediaCodec.CryptoInfo.Pattern newPattern)
Set the encryption pattern on a MediaCodec.CryptoInfo instance.
See MediaCodec.CryptoInfo.Pattern.
| Parameters | |
|---|---|
newPattern |
MediaCodec.CryptoInfo.Pattern
|
String toString ()
Returns a string representation of the object. In general, the
toString method returns a string that
"textually represents" this object. The result should
be a concise but informative representation that is easy for a
person to read.
It is recommended that all subclasses override this method.
The toString method for class Object
returns a string consisting of the name of the class of which the
object is an instance, the at-sign character `@', and
the unsigned hexadecimal representation of the hash code of the
object. In other words, this method returns a string equal to the
value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
| Returns | |
|---|---|
String |
a string representation of the object. |