net.sourceforge.jaad.mp4.od

Class ESDescriptor

java.lang.Object

net.sourceforge.jaad.mp4.od.Descriptor

net.sourceforge.jaad.mp4.od.ESDescriptor

public class ESDescriptor
extends Descriptor

The ESDescriptor conveys all information related to a particular elementary stream and has three major parts: The first part consists of the ES_ID which is a unique reference to the elementary stream within its name scope, a mechanism to group elementary streams within this Descriptor and an optional URL String. The second part is a set of optional extension descriptors that support the inclusion of future extensions as well as the transport of private data in a backward compatible way. The third part consists of the DecoderConfigDescriptor, SLConfigDescriptor, IPIDescriptor and QoSDescriptor which convey the parameters and requirements of the elementary stream.

Field Summary

Fields inherited from class net.sourceforge.jaad.mp4.od.Descriptor

size, start, type, TYPE_DECODER_CONFIG_DESCRIPTOR, TYPE_DECODER_SPECIFIC_INFO, TYPE_ES_DESCRIPTOR, TYPE_ES_ID_INC, TYPE_INITIAL_OBJECT_DESCRIPTOR, TYPE_MP4_INITIAL_OBJECT_DESCRIPTOR, TYPE_OBJECT_DESCRIPTOR, TYPE_SL_CONFIG_DESCRIPTOR

Constructor Summary

Constructors

Constructor and Description
ESDescriptor()

Method Summary

Methods

Modifier and Type	Method and Description
int	getDependingOnES_ID() The dependingOnES_ID is the ES_ID of another elementary stream on which this elementary stream depends.
int	getES_ID() The ES_ID provides a unique label for each elementary stream within its name scope.
int	getStreamPriority() The stream priority indicates a relative measure for the priority of this elementary stream.
java.lang.String	getURL() A URL String that shall point to the location of an SL-packetized stream by name.
boolean	hasStreamDependency() Indicates if an ID of another stream is present, on which this stream depends.
boolean	isURLPresent() A flag that indicates the presence of a URL.

Methods inherited from class net.sourceforge.jaad.mp4.od.Descriptor

createDescriptor, getChildren, getSize, getType, readChildren

Methods inherited from class java.lang.Object

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

Constructor Detail

ESDescriptor

public ESDescriptor()

Method Detail

getES_ID

public int getES_ID()

The ES_ID provides a unique label for each elementary stream within its name scope. The value should be within 0 and 65535 exclusively. The values 0 and 65535 are reserved.

Returns:

the elementary stream's ID

hasStreamDependency

public boolean hasStreamDependency()

Indicates if an ID of another stream is present, on which this stream depends.

Returns:

true if the dependingOnES_ID is present

getDependingOnES_ID

public int getDependingOnES_ID()

The dependingOnES_ID is the ES_ID of another elementary stream on which this elementary stream depends. The stream with the dependingOnES_ID shall also be associated to this Descriptor. If no value is present (if hasStreamDependency() returns false) this method returns -1.

Returns:

the dependingOnES_ID value, or -1 if none is present

isURLPresent

public boolean isURLPresent()

A flag that indicates the presence of a URL.

Returns:

true if a URL is present

getURL

public java.lang.String getURL()

A URL String that shall point to the location of an SL-packetized stream by name. The parameters of the SL-packetized stream that is retrieved from the URL are fully specified in this ESDescriptor. If no URL is present (if isURLPresent() returns false) this method returns null.

Returns:

a URL String or null if none is present

getStreamPriority

public int getStreamPriority()

The stream priority indicates a relative measure for the priority of this elementary stream. An elementary stream with a higher priority is more important than one with a lower priority. The absolute values are not normatively defined.

Returns:

the stream priority