org.esau.ptarmigan.impl
Class MPEGFrameHeader

java.lang.Object
  |
  +--org.esau.ptarmigan.impl.MPEGFrameHeader

public final class MPEGFrameHeader

extends java.lang.Object

MPEG Frame Header

Parse and validate a 4-byte MPEG Header

Version:

$Revision: 1.2 $ $Date: 2002/10/02 05:27:03 $

Author:

Reed Esau

Constructor Summary

MPEGFrameHeader()
ctor

MPEGFrameHeader(MPEGFrameHeader other)
copy ctor

Method Summary

java.lang.String	getAudioVersion()
int	getBitRate()
java.lang.String	getChannelDesc()
int	getChannelMode()
int	getChannels()
boolean	getCopyright()
int	getEmphasis()
int	getFrameLength()
int	getLayer()
int	getModeExt()
boolean	getOriginal()
boolean	getPadding()
boolean	getPrivateBit()
boolean	getProtection()
int	getSampleRate()
boolean	initHeader(byte[] buf, int offset) Try to identify a frame header in the specified buffer at the specified offset.
void	resetData()

Methods inherited from class java.lang.Object

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

Constructor Detail

MPEGFrameHeader

public MPEGFrameHeader()

ctor

MPEGFrameHeader

public MPEGFrameHeader(MPEGFrameHeader other)

copy ctor

Method Detail

initHeader

public boolean initHeader(byte[] buf,
                          int offset)

Try to identify a frame header in the specified buffer at the specified offset. Note that it's not definitive. You have to look for repeating MPEG frames and check CRCs to make sure. AAAAAAAA AAABBCCD EEEEFFGH IIJJKLMM

Returns:

false if not a valid frame header; true if it may be (but not definitive)

getAudioVersion

public java.lang.String getAudioVersion()

getLayer

public int getLayer()

getProtection

public boolean getProtection()

getPadding

public boolean getPadding()

getPrivateBit

public boolean getPrivateBit()

getChannelMode

public int getChannelMode()

getModeExt

public int getModeExt()

getChannels

public int getChannels()

getChannelDesc

public java.lang.String getChannelDesc()

getCopyright

public boolean getCopyright()

getOriginal

public boolean getOriginal()

getEmphasis

public int getEmphasis()

getBitRate

public int getBitRate()

getSampleRate

public int getSampleRate()

getFrameLength

public int getFrameLength()

resetData

public void resetData()