public class GenericHeader extends ProtectionSpecificHeader
ASF_Protection_System_Identifier_Object 9A04F079-9840-4286-AB92E65BE0885F95
ASF_Content_Protection_System_Microsoft_PlayReady F4637010-03C3-42CD-B932B48ADF3A6A54
ASF_StreamType_PlayReady_Encrypted_Command_Media 8683973A-6639-463A-ABD764F1CE3EEAE0
Specifications > Microsoft PlayReady Format Specification > 2. PlayReady Media Format > 2.5. Data Objects > 2.5.1. Payload TrackExtension for AES in Counter Mode
The sample Id is used as the IV in CTR mode. Block offset, starting at 0 and incremented by 1 after every 16 bytes, from the beginning of the sample is used as the Counter.
The sample ID for each sample (media object) is stored as an ASF payload extension system with the ID of ASF_Payload_Extension_Encryption_SampleID = {6698B84E-0AFA-4330-AEB2-1C0A98D7A44D}. The payload extension can be stored as a fixed size extension of 8 bytes.
The sample ID is always stored in big-endian byte order.
Modifier and Type | Field and Description |
---|---|
static UUID |
PROTECTION_SYSTEM_ID |
uuidRegistry
Constructor and Description |
---|
GenericHeader() |
Modifier and Type | Method and Description |
---|---|
ByteBuffer |
getData() |
UUID |
getSystemId() |
void |
parse(ByteBuffer buffer) |
createFor, equals, toString
public static UUID PROTECTION_SYSTEM_ID
public UUID getSystemId()
getSystemId
in class ProtectionSpecificHeader
public void parse(ByteBuffer buffer)
parse
in class ProtectionSpecificHeader
public ByteBuffer getData()
getData
in class ProtectionSpecificHeader
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