tv.danmaku.ijk.media.drm.util

类 PsshAtomUtil

java.lang.Object

tv.danmaku.ijk.media.drm.util.PsshAtomUtil

public final class PsshAtomUtil
extends java.lang.Object

Utility methods for handling PSSH atoms.

方法概要

限定符和类型	方法和说明
static byte[]	buildPsshAtom(java.util.UUID systemId, byte[] data) Builds a version 0 PSSH atom for a given system id, containing the given data.
static byte[]	buildPsshAtom(java.util.UUID systemId, java.util.UUID[] keyIds, byte[] data) Builds a PSSH atom for the given system id, containing the given key ids and data.
static boolean	isPsshAtom(byte[] data) Returns whether the data is a valid PSSH atom.
static byte[]	parseSchemeSpecificData(byte[] atom, java.util.UUID uuid) Parses the scheme specific data from a PSSH atom.
static java.util.UUID	parseUuid(byte[] atom) Parses the UUID from a PSSH atom.
static int	parseVersion(byte[] atom) Parses the version from a PSSH atom.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

buildPsshAtom

public static byte[] buildPsshAtom(java.util.UUID systemId,
                                   byte[] data)

Builds a version 0 PSSH atom for a given system id, containing the given data.

参数:

systemId - The system id of the scheme.

data - The scheme specific data.

返回:

The PSSH atom.

buildPsshAtom

public static byte[] buildPsshAtom(java.util.UUID systemId,
                                   java.util.UUID[] keyIds,
                                   byte[] data)

Builds a PSSH atom for the given system id, containing the given key ids and data.

参数:

systemId - The system id of the scheme.

keyIds - The key ids for a version 1 PSSH atom, or null for a version 0 PSSH atom.

data - The scheme specific data.

返回:

The PSSH atom.

isPsshAtom

public static boolean isPsshAtom(byte[] data)

Returns whether the data is a valid PSSH atom.

参数:

data - The data to parse.

返回:

Whether the data is a valid PSSH atom.

parseUuid

public static java.util.UUID parseUuid(byte[] atom)

Parses the UUID from a PSSH atom. Version 0 and 1 PSSH atoms are supported.

The UUID is only parsed if the data is a valid PSSH atom.

参数:

atom - The atom to parse.

返回:

The parsed UUID. Null if the input is not a valid PSSH atom, or if the PSSH atom has an unsupported version.

parseVersion

public static int parseVersion(byte[] atom)

Parses the version from a PSSH atom. Version 0 and 1 PSSH atoms are supported.

The version is only parsed if the data is a valid PSSH atom.

参数:

atom - The atom to parse.

返回:

The parsed version. -1 if the input is not a valid PSSH atom, or if the PSSH atom has an unsupported version.

parseSchemeSpecificData

public static byte[] parseSchemeSpecificData(byte[] atom,
                                             java.util.UUID uuid)

Parses the scheme specific data from a PSSH atom. Version 0 and 1 PSSH atoms are supported.

The scheme specific data is only parsed if the data is a valid PSSH atom matching the given UUID, or if the data is a valid PSSH atom of any type in the case that the passed UUID is null.

参数:

atom - The atom to parse.

uuid - The required UUID of the PSSH atom, or null to accept any UUID.

返回:

The parsed scheme specific data. Null if the input is not a valid PSSH atom, or if the PSSH atom has an unsupported version, or if the PSSH atom does not match the passed UUID.