com.sun.media.sound

Class AuFileReader

java.lang.Object

javax.sound.sampled.spi.AudioFileReader

com.sun.media.sound.AuFileReader

public class AuFileReader
extends javax.sound.sampled.spi.AudioFileReader

AU file reader.

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	bisBufferSize
static javax.sound.sampled.AudioFileFormat.Type[]	types AU reader type

Constructor Summary

Constructors

Constructor and Description
AuFileReader() Constructs a new AuFileReader object.

Method Summary

Modifier and Type	Method and Description
protected int	big2little(int i) big2little Protected helper method to swap the order of bytes in a 32 bit int
protected short	big2littleShort(short i) big2little Protected helper method to swap the order of bytes in a 16 bit short
protected static int	calculatePCMFrameSize(int sampleSizeInBits, int channels) Calculates the frame size for PCM frames.
javax.sound.sampled.AudioFileFormat	getAudioFileFormat(java.io.File file) Obtains the audio file format of the File provided.
javax.sound.sampled.AudioFileFormat	getAudioFileFormat(java.io.InputStream stream) Obtains the audio file format of the input stream provided.
javax.sound.sampled.AudioFileFormat	getAudioFileFormat(java.net.URL url) Obtains the audio file format of the URL provided.
javax.sound.sampled.AudioInputStream	getAudioInputStream(java.io.File file) Obtains an audio stream from the File provided.
javax.sound.sampled.AudioInputStream	getAudioInputStream(java.io.InputStream stream) Obtains an audio stream from the input stream provided.
javax.sound.sampled.AudioInputStream	getAudioInputStream(java.net.URL url) Obtains an audio stream from the URL provided.
protected int	rllong(java.io.DataInputStream dis) rllong Protected helper method to read 64 bits and changing the order of each bytes.
protected short	rlshort(java.io.DataInputStream dis) rlshort Protected helper method to read 16 bits value.

Methods inherited from class java.lang.Object

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

Field Detail

types

public static final javax.sound.sampled.AudioFileFormat.Type[] types

AU reader type

bisBufferSize

protected static final int bisBufferSize

See Also:

Constant Field Values

Constructor Detail

AuFileReader

public AuFileReader()

Constructs a new AuFileReader object.

Method Detail

getAudioFileFormat

public javax.sound.sampled.AudioFileFormat getAudioFileFormat(java.io.InputStream stream)
                                                       throws javax.sound.sampled.UnsupportedAudioFileException,
                                                              java.io.IOException

Obtains the audio file format of the input stream provided. The stream must point to valid audio file data. In general, audio file providers may need to read some data from the stream before determining whether they support it. These parsers must be able to mark the stream, read enough data to determine whether they support the stream, and, if not, reset the stream's read pointer to its original position. If the input stream does not support this, this method may fail with an IOException.

Parameters:

stream - the input stream from which file format information should be extracted

Returns:

an AudioFileFormat object describing the audio file format

Throws:

javax.sound.sampled.UnsupportedAudioFileException - if the stream does not point to valid audio file data recognized by the system

java.io.IOException - if an I/O exception occurs

See Also:

InputStream.markSupported(), InputStream.mark(int)

getAudioFileFormat

public javax.sound.sampled.AudioFileFormat getAudioFileFormat(java.net.URL url)
                                                       throws javax.sound.sampled.UnsupportedAudioFileException,
                                                              java.io.IOException

Obtains the audio file format of the URL provided. The URL must point to valid audio file data.

Parameters:

url - the URL from which file format information should be extracted

Returns:

an AudioFileFormat object describing the audio file format

Throws:

javax.sound.sampled.UnsupportedAudioFileException - if the URL does not point to valid audio file data recognized by the system

java.io.IOException - if an I/O exception occurs

getAudioFileFormat

public javax.sound.sampled.AudioFileFormat getAudioFileFormat(java.io.File file)
                                                       throws javax.sound.sampled.UnsupportedAudioFileException,
                                                              java.io.IOException

Obtains the audio file format of the File provided. The File must point to valid audio file data.

Parameters:

file - the File from which file format information should be extracted

Returns:

an AudioFileFormat object describing the audio file format

Throws:

javax.sound.sampled.UnsupportedAudioFileException - if the File does not point to valid audio file data recognized by the system

java.io.IOException - if an I/O exception occurs

getAudioInputStream

public javax.sound.sampled.AudioInputStream getAudioInputStream(java.io.InputStream stream)
                                                         throws javax.sound.sampled.UnsupportedAudioFileException,
                                                                java.io.IOException

Obtains an audio stream from the input stream provided. The stream must point to valid audio file data. In general, audio file providers may need to read some data from the stream before determining whether they support it. These parsers must be able to mark the stream, read enough data to determine whether they support the stream, and, if not, reset the stream's read pointer to its original position. If the input stream does not support this, this method may fail with an IOException.

Parameters:

stream - the input stream from which the AudioInputStream should be constructed

Returns:

an AudioInputStream object based on the audio file data contained in the input stream.

Throws:

javax.sound.sampled.UnsupportedAudioFileException - if the stream does not point to valid audio file data recognized by the system

java.io.IOException - if an I/O exception occurs

See Also:

InputStream.markSupported(), InputStream.mark(int)

getAudioInputStream

public javax.sound.sampled.AudioInputStream getAudioInputStream(java.net.URL url)
                                                         throws javax.sound.sampled.UnsupportedAudioFileException,
                                                                java.io.IOException

Obtains an audio stream from the URL provided. The URL must point to valid audio file data.

Parameters:

url - the URL for which the AudioInputStream should be constructed

Returns:

an AudioInputStream object based on the audio file data pointed to by the URL

Throws:

javax.sound.sampled.UnsupportedAudioFileException - if the URL does not point to valid audio file data recognized by the system

java.io.IOException - if an I/O exception occurs

getAudioInputStream

public javax.sound.sampled.AudioInputStream getAudioInputStream(java.io.File file)
                                                         throws javax.sound.sampled.UnsupportedAudioFileException,
                                                                java.io.IOException

Obtains an audio stream from the File provided. The File must point to valid audio file data.

Parameters:

file - the File for which the AudioInputStream should be constructed

Returns:

an AudioInputStream object based on the audio file data pointed to by the File

Throws:

javax.sound.sampled.UnsupportedAudioFileException - if the File does not point to valid audio file data recognized by the system

java.io.IOException - if an I/O exception occurs

rllong

protected int rllong(java.io.DataInputStream dis)
              throws java.io.IOException

rllong Protected helper method to read 64 bits and changing the order of each bytes.

Parameters:

DataInputStream -

Returns:

32 bits swapped value.

Throws:

java.io.IOException

big2little

protected int big2little(int i)

big2little Protected helper method to swap the order of bytes in a 32 bit int

Parameters:

int -

Returns:

32 bits swapped value

rlshort

protected short rlshort(java.io.DataInputStream dis)
                 throws java.io.IOException

rlshort Protected helper method to read 16 bits value. Swap high with low byte.

Parameters:

DataInputStream -

Returns:

the swapped value.

Throws:

java.io.IOException

big2littleShort

protected short big2littleShort(short i)

big2little Protected helper method to swap the order of bytes in a 16 bit short

Parameters:

int -

Returns:

16 bits swapped value

calculatePCMFrameSize

protected static int calculatePCMFrameSize(int sampleSizeInBits,
                                           int channels)

Calculates the frame size for PCM frames. Note that this method is appropriate for non-packed samples. For instance, 12 bit, 2 channels will return 4 bytes, not 3.

Parameters:

sampleSizeInBits - the size of a single sample in bits

channels - the number of channels

Returns:

the size of a PCM frame in bytes.