java.lang.Object
- javax.sound.sampled.AudioFileFormat

public class AudioFileFormat
extends Object

An instance of the AudioFileFormat class describes an audio file, including the file type, the file's length in bytes, the length in sample frames of the audio data contained in the file, and the format of the audio data.

The AudioSystem class includes methods for determining the format of an audio file, obtaining an audio input stream from an audio file, and writing an audio file from an audio input stream.

An AudioFileFormat object can include a set of properties. A property is a pair of key and value: the key is of type String, the associated property value is an arbitrary object. Properties specify additional informational meta data (like a author, copyright, or file duration). Properties are optional information, and file reader and file writer implementations are not required to provide or recognize properties.

The following table lists some common properties that should be used in implementations:

Property key	Value type	Description
"duration"	`Long`	playback duration of the file in microseconds
"author"	`String`	name of the author of this file
"title"	`String`	title of this file
"copyright"	`String`	copyright message
"date"	`Date`	date of the recording or release
"comment"	`String`	an arbitrary text

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Since:: 1.3
See Also:: AudioInputStream

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class AudioFileFormat.Type
An instance of the Type class represents one of the standard types of audio file.

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Constructor Summary

Constructors
Modifier	Constructor and Description
	`AudioFileFormat(AudioFileFormat.Type type, AudioFormat format, int frameLength)` Constructs an audio file format object.
	`AudioFileFormat(AudioFileFormat.Type type, AudioFormat format, int frameLength, Map<String,Object> properties)` Construct an audio file format object with a set of defined properties.
`protected`	`AudioFileFormat(AudioFileFormat.Type type, int byteLength, AudioFormat format, int frameLength)` Constructs an audio file format object.

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Method Summary

Methods
Modifier and Type	Method and Description
`int`	`getByteLength()` Obtains the size in bytes of the entire audio file (not just its audio data).
`AudioFormat`	`getFormat()` Obtains the format of the audio data contained in the audio file.
`int`	`getFrameLength()` Obtains the length of the audio data contained in the file, expressed in sample frames.
`Object`	`getProperty(String key)` Obtain the property value specified by the key.
`AudioFileFormat.Type`	`getType()` Obtains the audio file type, such as `WAVE` or `AU`.
`Map<String,Object>`	`properties()` Obtain an unmodifiable map of properties.
`String`	`toString()` Provides a string representation of the file format.

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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - AudioFileFormat
```
protected AudioFileFormat(AudioFileFormat.Type type,
               int byteLength,
               AudioFormat format,
               int frameLength)
```
    Constructs an audio file format object. This protected constructor is intended for use by providers of file-reading services when returning information about an audio file or about supported audio file formats.
    
    Parameters:
    type - the type of the audio file
    byteLength - the length of the file in bytes, or AudioSystem.NOT_SPECIFIED
    format - the format of the audio data contained in the file
    frameLength - the audio data length in sample frames, or AudioSystem.NOT_SPECIFIED
    See Also:
    getType()
  - AudioFileFormat
```
public AudioFileFormat(AudioFileFormat.Type type,
               AudioFormat format,
               int frameLength)
```
    Constructs an audio file format object. This public constructor may be used by applications to describe the properties of a requested audio file.
    
    Parameters:
    type - the type of the audio file
    format - the format of the audio data contained in the file
    frameLength - the audio data length in sample frames, or AudioSystem.NOT_SPECIFIED
  - AudioFileFormat
```
public AudioFileFormat(AudioFileFormat.Type type,
               AudioFormat format,
               int frameLength,
               Map<String,Object> properties)
```
    Construct an audio file format object with a set of defined properties. This public constructor may be used by applications to describe the properties of a requested audio file. The properties map will be copied to prevent any changes to it.
    
    Parameters:
    type - the type of the audio file
    format - the format of the audio data contained in the file
    frameLength - the audio data length in sample frames, or AudioSystem.NOT_SPECIFIED
    properties - a Map<String,Object> object with properties
    Since:
    
    1.5
- Method Detail
  - getType
```
public AudioFileFormat.Type getType()
```
    Obtains the audio file type, such as WAVE or AU.
    
    Returns:
    the audio file type
    See Also:
    AudioFileFormat.Type.WAVE, AudioFileFormat.Type.AU, AudioFileFormat.Type.AIFF, AudioFileFormat.Type.AIFC, AudioFileFormat.Type.SND
  - getByteLength
```
public int getByteLength()
```
    Obtains the size in bytes of the entire audio file (not just its audio data).
    
    Returns:
    the audio file length in bytes
    See Also:
    AudioSystem.NOT_SPECIFIED
  - getFormat
```
public AudioFormat getFormat()
```
    Obtains the format of the audio data contained in the audio file.
    
    Returns:
    the audio data format
  - getFrameLength
```
public int getFrameLength()
```
    Obtains the length of the audio data contained in the file, expressed in sample frames.
    
    Returns:
    the number of sample frames of audio data in the file
    See Also:
    AudioSystem.NOT_SPECIFIED
  - properties
```
public Map<String,Object> properties()
```
    Obtain an unmodifiable map of properties. The concept of properties is further explained in the class description.
    
    Returns:
    a Map<String,Object> object containing all properties. If no properties are recognized, an empty map is returned.
    Since:
    
    1.5
    
    See Also:
    getProperty(String)
  - getProperty
```
public Object getProperty(String key)
```
    Obtain the property value specified by the key. The concept of properties is further explained in the class description.
    If the specified property is not defined for a particular file format, this method returns null.
    
    Parameters:
    key - the key of the desired property
    
    Returns:
    the value of the property with the specified key, or null if the property does not exist.
    Since:
    
    1.5
    
    See Also:
    properties()
  - toString
```
public String toString()
```
    Provides a string representation of the file format.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    the file format as a string

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Vielen Dank im Voraus.

Dokument erstellt 11/06/2005, zuletzt geändert 04/03/2020
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-rf-javax/sound/sampled/audiofileformat.html

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Referenzen

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Class AudioFileFormat

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

AudioFileFormat

AudioFileFormat

AudioFileFormat

Method Detail

getType

getByteLength

getFormat

getFrameLength

properties

getProperty

toString

Referenzen