edu.umd.cfar.lamp.mpeg1.system
Class SystemIndex

java.lang.Object
  edu.umd.cfar.lamp.mpeg1.system.SystemIndex

public class SystemIndex

extends java.lang.Object

Field Summary

static int

MAGIC_NUMBER

Constructor Summary

SystemIndex()

Method Summary

void	addPacket(int stream_id, long systemStreamBytePosition, int packetDataLength) Adds a SystemIndexElement to the index.
long	getLastByteInPacket(int stream_id, long bytePosition)
long	getPosition(int stream_id, long bytePosition) Gets the byte position in the System Stream of the given byte position in the elementary stream with the given stream_id.
java.util.Vector	getStreamList()
java.util.Vector	getVideoStreamList()
void	readIndex(java.io.DataInput in)
java.lang.String	toString()
void	writeIndex(java.io.DataOutput out)

Methods inherited from class java.lang.Object

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

Field Detail

MAGIC_NUMBER

public static final int MAGIC_NUMBER

See Also:

Constant Field Values

Constructor Detail

SystemIndex

public SystemIndex()

Method Detail

writeIndex

public void writeIndex(java.io.DataOutput out)
                throws java.io.IOException

Throws:

java.io.IOException

readIndex

public void readIndex(java.io.DataInput in)
               throws java.io.IOException,
                      MpegException

Throws:

java.io.IOException

MpegException

toString

public java.lang.String toString()

getStreamList

public java.util.Vector getStreamList()

Returns:

a Vector of Integers, corresponding to the list of stream_ids.

getVideoStreamList

public java.util.Vector getVideoStreamList()

addPacket

public void addPacket(int stream_id,
                      long systemStreamBytePosition,
                      int packetDataLength)

Adds a SystemIndexElement to the index. The SystemIndexElement is calculated based on the stream_id, the systemStreamBytePosition, and the index so far.

Parameters:

stream_id - the stream

systemStreamBytePosition - the byte position into the system stream

packetDataLength - the length of the packet

getPosition

public long getPosition(int stream_id,
                        long bytePosition)
                 throws StreamNotFoundException

Gets the byte position in the System Stream of the given byte position in the elementary stream with the given stream_id.

Parameters:

stream_id - the stream

bytePosition - the position into the stream

Returns:

the position in the file

Throws:

StreamNotFoundException

getLastByteInPacket

public long getLastByteInPacket(int stream_id,
                                long bytePosition)
                         throws StreamNotFoundException

Throws:

StreamNotFoundException