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org.ocap.si
Class Descriptor
java.lang.Object
org.ocap.si.Descriptor
public abstract class Descriptor
- extends java.lang.Object
This class represents an MPEG-2 descriptor.
| Constructor Summary | |
|---|---|
Descriptor()
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| Method Summary | |
|---|---|
abstract byte |
getByteAt(int index)
Get a particular byte within the descriptor content. |
abstract byte[] |
getContent()
Get the data contained within this descriptor. |
abstract short |
getContentLength()
Get the descriptor_length field. |
abstract short |
getTag()
Get the descriptor_tag field. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
Descriptor
public Descriptor()
| Method Detail |
|---|
getTag
public abstract short getTag()
- Get the descriptor_tag field. Eight bit field that identifies
each descriptor. The range of valid MPEG-2 descriptor tag values
is 0x2 through 0xFF.
- Returns:
- The descriptor tag.
getContentLength
public abstract short getContentLength()
- Get the descriptor_length field. Eight bit field specifying the
number of bytes of the descriptor immediately following the
descriptor_length field.
- Returns:
- The descriptor length.
getContent
public abstract byte[] getContent()
- Get the data contained within this descriptor. The data is returned
in an array of bytes and consists of the data immediately following
the descriptor_length field with length indicated by that field.
- Returns:
- The descriptor data.
getByteAt
public abstract byte getByteAt(int index)
- Get a particular byte within the descriptor content. The data is
returned in a byte which is located at the position specified by
an index parameter in the data content immediately following the
descriptor_length field.
- Parameters:
index- An index to the descriptor content. Value 0 corresponds to the first byte after the length field.- Returns:
- The required byte data.
- Throws:
java.lang.IndexOutOfBoundsException- if index < 0 or index >= ContentLength
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