freenet.client.filter

Class OggPage

java.lang.Object

freenet.client.filter.OggPage

public class OggPage
extends java.lang.Object

Represents a single page of an Ogg bitstream

Constructor Summary

Constructors

Constructor and Description
OggPage(java.io.DataInputStream input)
OggPage(OggPage oldPage, java.util.Collection<CodecPacket> packets)

Method Summary

Modifier and Type	Method and Description
java.util.Collection<CodecPacket>	asPackets()
byte[]	calculateCRC() Calculates this page's 32 bit CRC checksum.
int	getPageNumber()
int	getSerial()
boolean	headerValid() Checks some header values for sanity, and verifies this Page's checksum field.
boolean	isFinalPacket()
boolean	isPacketContinued()
static OggPage	readPage(java.io.DataInputStream input) Extracts the Ogg page from a physical bitstream
void	recalculateSegmentLacing(java.util.LinkedList<java.lang.Integer> packetSizes) Rewrites the stored sizes of this page's segments.
static void	seekToPage(java.io.DataInputStream input) Extracts the Ogg page from a physical bitstream
byte[]	toArray()

Methods inherited from class java.lang.Object

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

Constructor Detail

OggPage

public OggPage(java.io.DataInputStream input)
        throws java.io.IOException

Throws:

java.io.IOException

OggPage

public OggPage(OggPage oldPage,
               java.util.Collection<CodecPacket> packets)
        throws java.io.IOException

Throws:

java.io.IOException

Method Detail

seekToPage

public static void seekToPage(java.io.DataInputStream input)
                       throws java.io.IOException

Extracts the Ogg page from a physical bitstream

Parameters:

input - a stream of data containing a physical bitstream

Throws:

java.io.IOException

readPage

public static OggPage readPage(java.io.DataInputStream input)
                        throws java.io.IOException

Extracts the Ogg page from a physical bitstream

Parameters:

input - a stream of data containing a physical bitstream

Returns:

the next Ogg page in bitstream

Throws:

java.io.IOException

headerValid

public boolean headerValid()

Checks some header values for sanity, and verifies this Page's checksum field.

Returns:

whether or not the page is valid

isPacketContinued

public boolean isPacketContinued()

isFinalPacket

public boolean isFinalPacket()

toArray

public byte[] toArray()

getSerial

public int getSerial()

getPageNumber

public int getPageNumber()

calculateCRC

public byte[] calculateCRC()

Calculates this page's 32 bit CRC checksum.

recalculateSegmentLacing

public void recalculateSegmentLacing(java.util.LinkedList<java.lang.Integer> packetSizes)

Rewrites the stored sizes of this page's segments.

Parameters:

packetSizes - The sizes of any packets inside of this page's payload. If not null, a segment will be prematurely closed after each packet's size number of bytes have been read.

asPackets

public java.util.Collection<CodecPacket> asPackets()