org.jaudiotagger.audio.ogg.util
Class VorbisIdentificationHeader

java.lang.Object
  org.jaudiotagger.audio.ogg.util.VorbisIdentificationHeader

All Implemented Interfaces:

VorbisHeader

public class VorbisIdentificationHeader
extends java.lang.Object
implements VorbisHeader

Vorbis Identification header

From http://xiph.org/vorbis/doc/Vorbis_I_spec.html#id326710

The identification header is a short header of only a few fields used to declare the stream definitively as Vorbis, and provide a few externally relevant pieces of information about the audio stream. The identification header is coded as follows:

1) [vorbis_version] = read 32 bits as unsigned integer 2) [audio_channels] = read 8 bit integer as unsigned 3) [audio_sample_rate] = read 32 bits as unsigned integer 4) [bitrate_maximum] = read 32 bits as signed integer 5) [bitrate_nominal] = read 32 bits as signed integer 6) [bitrate_minimum] = read 32 bits as signed integer 7) [blocksize_0] = 2 exponent (read 4 bits as unsigned integer) 8) [blocksize_1] = 2 exponent (read 4 bits as unsigned integer) 9) [framing_flag] = read one bit

$Id: VorbisIdentificationHeader.java,v 1.8 2009/09/03 09:19:13 paultaylor Exp $

Version:

16 d�cembre 2003

Author:

Raphael Slinckx (KiKiDonK)

Field Summary

private int	audioChannels
private int	audioSampleRate
private int	bitrateMaximal
private int	bitrateMinimal
private int	bitrateNominal
static int	FIELD_AUDIO_CHANNELS_LENGTH
static int	FIELD_AUDIO_CHANNELS_POS
static int	FIELD_AUDIO_SAMPLE_RATE_LENGTH
static int	FIELD_AUDIO_SAMPLE_RATE_POS
static int	FIELD_BITRATE_MAX_LENGTH
static int	FIELD_BITRATE_MAX_POS
static int	FIELD_BITRATE_MIN_LENGTH
static int	FIELD_BITRATE_MIN_POS
static int	FIELD_BITRATE_NOMAIML_LENGTH
static int	FIELD_BITRATE_NOMAIML_POS
static int	FIELD_BLOCKSIZE_LENGTH
static int	FIELD_BLOCKSIZE_POS
static int	FIELD_FRAMING_FLAG_LENGTH
static int	FIELD_FRAMING_FLAG_POS
static int	FIELD_VORBIS_VERSION_LENGTH
static int	FIELD_VORBIS_VERSION_POS
private boolean	isValid
static java.util.logging.Logger	logger
private int	vorbisVersion

Fields inherited from interface org.jaudiotagger.audio.ogg.util.VorbisHeader

CAPTURE_PATTERN, CAPTURE_PATTERN_AS_BYTES, CHARSET_UTF_8, FIELD_CAPTURE_PATTERN_LENGTH, FIELD_CAPTURE_PATTERN_POS, FIELD_PACKET_TYPE_LENGTH, FIELD_PACKET_TYPE_POS

Constructor Summary

VorbisIdentificationHeader(byte[] vorbisData)

Method Summary

void	decodeHeader(byte[] b)
int	getChannelNumber()
java.lang.String	getEncodingType()
int	getMaxBitrate()
int	getMinBitrate()
int	getNominalBitrate()
int	getSamplingRate()
boolean	isValid()
private int	u(int i)

Methods inherited from class java.lang.Object

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

Field Detail

logger

public static java.util.logging.Logger logger

audioChannels

private int audioChannels

isValid

private boolean isValid

vorbisVersion

private int vorbisVersion

audioSampleRate

private int audioSampleRate

bitrateMinimal

private int bitrateMinimal

bitrateNominal

private int bitrateNominal

bitrateMaximal

private int bitrateMaximal

FIELD_VORBIS_VERSION_POS

public static final int FIELD_VORBIS_VERSION_POS

See Also:

Constant Field Values

FIELD_AUDIO_CHANNELS_POS

public static final int FIELD_AUDIO_CHANNELS_POS

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Constant Field Values

FIELD_AUDIO_SAMPLE_RATE_POS

public static final int FIELD_AUDIO_SAMPLE_RATE_POS

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Constant Field Values

FIELD_BITRATE_MAX_POS

public static final int FIELD_BITRATE_MAX_POS

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Constant Field Values

FIELD_BITRATE_NOMAIML_POS

public static final int FIELD_BITRATE_NOMAIML_POS

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Constant Field Values

FIELD_BITRATE_MIN_POS

public static final int FIELD_BITRATE_MIN_POS

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Constant Field Values

FIELD_BLOCKSIZE_POS

public static final int FIELD_BLOCKSIZE_POS

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Constant Field Values

FIELD_FRAMING_FLAG_POS

public static final int FIELD_FRAMING_FLAG_POS

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Constant Field Values

FIELD_VORBIS_VERSION_LENGTH

public static final int FIELD_VORBIS_VERSION_LENGTH

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Constant Field Values

FIELD_AUDIO_CHANNELS_LENGTH

public static final int FIELD_AUDIO_CHANNELS_LENGTH

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Constant Field Values

FIELD_AUDIO_SAMPLE_RATE_LENGTH

public static final int FIELD_AUDIO_SAMPLE_RATE_LENGTH

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Constant Field Values

FIELD_BITRATE_MAX_LENGTH

public static final int FIELD_BITRATE_MAX_LENGTH

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Constant Field Values

FIELD_BITRATE_NOMAIML_LENGTH

public static final int FIELD_BITRATE_NOMAIML_LENGTH

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Constant Field Values

FIELD_BITRATE_MIN_LENGTH

public static final int FIELD_BITRATE_MIN_LENGTH

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Constant Field Values

FIELD_BLOCKSIZE_LENGTH

public static final int FIELD_BLOCKSIZE_LENGTH

See Also:

Constant Field Values

FIELD_FRAMING_FLAG_LENGTH

public static final int FIELD_FRAMING_FLAG_LENGTH

See Also:

Constant Field Values

Constructor Detail

VorbisIdentificationHeader

public VorbisIdentificationHeader(byte[] vorbisData)

Method Detail

getChannelNumber

public int getChannelNumber()

getEncodingType

public java.lang.String getEncodingType()

getSamplingRate

public int getSamplingRate()

getNominalBitrate

public int getNominalBitrate()

getMaxBitrate

public int getMaxBitrate()

getMinBitrate

public int getMinBitrate()

isValid

public boolean isValid()

decodeHeader

public void decodeHeader(byte[] b)

u

private int u(int i)