org.jaudiotagger.audio.asf.data
Class FileHeader

java.lang.Object
  org.jaudiotagger.audio.asf.data.Chunk
      org.jaudiotagger.audio.asf.data.FileHeader

public class FileHeader
extends Chunk

This class stores the information about the file, which is contained within a special chunk of ASF files.

Author:

Christian Laireiter

Field Summary

private java.math.BigInteger	duration Duration of the media content in 100ns steps.
private java.util.Date	fileCreationTime The time the file was created.
private java.math.BigInteger	fileSize Size of the file or stream.
private long	flags Usually contains value of 2.
private long	maxPackageSize Maximum size of stream packages.
private long	minPackageSize Minimun size of stream packages.
private java.math.BigInteger	packageCount Number of stream packages within the File.
private java.math.BigInteger	timeEndPos No Idea of the Meaning, but stored anyway.
private java.math.BigInteger	timeStartPos Like timeEndPosno Idea.
private long	uncompressedFrameSize Size of an uncompressed video frame.

Fields inherited from class org.jaudiotagger.audio.asf.data.Chunk

chunkLength, guid, position

Constructor Summary

FileHeader(java.math.BigInteger chunckLen, java.math.BigInteger size, java.math.BigInteger fileTime, java.math.BigInteger pkgCount, java.math.BigInteger dur, java.math.BigInteger timestampStart, java.math.BigInteger timestampEnd, long headerFlags, long minPkgSize, long maxPkgSize, long uncmpVideoFrameSize)
Creates an instance.

Method Summary

java.math.BigInteger	getDuration()
int	getDurationInSeconds() This method converts getDuration()from 100ns steps to normal seconds.
java.util.Date	getFileCreationTime()
java.math.BigInteger	getFileSize()
long	getFlags()
long	getMaxPackageSize()
long	getMinPackageSize()
java.math.BigInteger	getPackageCount()
float	getPreciseDuration() This method converts getDuration() from 100ns steps to normal seconds with a fractional part taking milliseconds.
java.math.BigInteger	getTimeEndPos()
java.math.BigInteger	getTimeStartPos()
long	getUncompressedFrameSize()
java.lang.String	prettyPrint(java.lang.String prefix) (overridden)

Methods inherited from class org.jaudiotagger.audio.asf.data.Chunk

getChunckEnd, getChunkEnd, getChunkLength, getGuid, getPosition, setPosition, toString

Methods inherited from class java.lang.Object

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

Field Detail

duration

private final java.math.BigInteger duration

Duration of the media content in 100ns steps.

fileCreationTime

private final java.util.Date fileCreationTime

The time the file was created.

fileSize

private final java.math.BigInteger fileSize

Size of the file or stream.

flags

private final long flags

Usually contains value of 2.

maxPackageSize

private final long maxPackageSize

Maximum size of stream packages.
Warning: must be same size as minPackageSize. Its not known how to handle deviating values.

minPackageSize

private final long minPackageSize

Minimun size of stream packages.
Warning: must be same size as maxPackageSize. Its not known how to handle deviating values.

packageCount

private final java.math.BigInteger packageCount

Number of stream packages within the File.

timeEndPos

private final java.math.BigInteger timeEndPos

No Idea of the Meaning, but stored anyway.
Source documentation says it is: "Timestamp of end position"

timeStartPos

private final java.math.BigInteger timeStartPos

Like timeEndPosno Idea.

uncompressedFrameSize

private final long uncompressedFrameSize

Size of an uncompressed video frame.

Constructor Detail

FileHeader

public FileHeader(java.math.BigInteger chunckLen,
                  java.math.BigInteger size,
                  java.math.BigInteger fileTime,
                  java.math.BigInteger pkgCount,
                  java.math.BigInteger dur,
                  java.math.BigInteger timestampStart,
                  java.math.BigInteger timestampEnd,
                  long headerFlags,
                  long minPkgSize,
                  long maxPkgSize,
                  long uncmpVideoFrameSize)

Creates an instance.

Parameters:

chunckLen - Length of the file header (chunk)

size - Size of file or stream

fileTime - Time file or stream was created. Time is calculated since 1st january of 1601 in 100ns steps.

pkgCount - Number of stream packages.

dur - Duration of media clip in 100ns steps

timestampStart - Timestamp of start timeStartPos

timestampEnd - Timestamp of end timeEndPos

headerFlags - some stream related flags.

minPkgSize - minimum size of packages

maxPkgSize - maximum size of packages

uncmpVideoFrameSize - Size of an uncompressed Video Frame.

Method Detail

getDuration

public java.math.BigInteger getDuration()

Returns:

Returns the duration.

getDurationInSeconds

public int getDurationInSeconds()

This method converts getDuration()from 100ns steps to normal seconds.

Returns:

Duration of the media in seconds.

getFileCreationTime

public java.util.Date getFileCreationTime()

Returns:

Returns the fileCreationTime.

getFileSize

public java.math.BigInteger getFileSize()

Returns:

Returns the fileSize.

getFlags

public long getFlags()

Returns:

Returns the flags.

getMaxPackageSize

public long getMaxPackageSize()

Returns:

Returns the maxPackageSize.

getMinPackageSize

public long getMinPackageSize()

Returns:

Returns the minPackageSize.

getPackageCount

public java.math.BigInteger getPackageCount()

Returns:

Returns the packageCount.

getPreciseDuration

public float getPreciseDuration()

This method converts getDuration() from 100ns steps to normal seconds with a fractional part taking milliseconds.

Returns:

The duration of the media in seconds (with a precision of milliseconds)

getTimeEndPos

public java.math.BigInteger getTimeEndPos()

Returns:

Returns the timeEndPos.

getTimeStartPos

public java.math.BigInteger getTimeStartPos()

Returns:

Returns the timeStartPos.

getUncompressedFrameSize

public long getUncompressedFrameSize()

Returns:

Returns the uncompressedFrameSize.

prettyPrint

public java.lang.String prettyPrint(java.lang.String prefix)

(overridden)

Overrides:

prettyPrint in class Chunk

Parameters:

prefix - each line gets this string prepended.

Returns:

Information of current Chunk Object.

See Also:

Chunk.prettyPrint(String)