- java.lang.Object
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- javax.sound.sampled.AudioFormat.Encoding
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- Enclosing class:
- AudioFormat
public static class AudioFormat.Encoding extends Object
TheEncodingclass names the specific type of data representation used for an audio stream. The encoding includes aspects of the sound format other than the number of channels, sample rate, sample size, frame rate, frame size, and byte order.One ubiquitous type of audio encoding is pulse-code modulation (PCM), which is simply a linear (proportional) representation of the sound waveform. With PCM, the number stored in each sample is proportional to the instantaneous amplitude of the sound pressure at that point in time. The numbers may be signed or unsigned integers or floats. Besides PCM, other encodings include mu-law and a-law, which are nonlinear mappings of the sound amplitude that are often used for recording speech.
You can use a predefined encoding by referring to one of the static objects created by this class, such as
PCM_SIGNEDorPCM_UNSIGNED. Service providers can create new encodings, such as compressed audio formats, and make these available through theAudioSystemclass.The
Encodingclass is static, so that allAudioFormatobjects that have the same encoding will refer to the same object (rather than different instances of the same class). This allows matches to be made by checking that two format's encodings are equal.- Since:
- 1.3
- See Also:
AudioFormat,FormatConversionProvider
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Field Summary
Fields Modifier and Type Field Description static AudioFormat.EncodingALAWSpecifies a-law encoded data.static AudioFormat.EncodingPCM_FLOATSpecifies floating-point PCM data.static AudioFormat.EncodingPCM_SIGNEDSpecifies signed, linear PCM data.static AudioFormat.EncodingPCM_UNSIGNEDSpecifies unsigned, linear PCM data.static AudioFormat.EncodingULAWSpecifies u-law encoded data.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description booleanequals(Object obj)Indicates whether the specified object is equal to this encoding, returningtrueif the objects are equal.inthashCode()Returns a hash code value for this encoding.StringtoString()Provides theStringrepresentation of the encoding.
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Field Detail
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PCM_SIGNED
public static final AudioFormat.Encoding PCM_SIGNED
Specifies signed, linear PCM data.
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PCM_UNSIGNED
public static final AudioFormat.Encoding PCM_UNSIGNED
Specifies unsigned, linear PCM data.
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PCM_FLOAT
public static final AudioFormat.Encoding PCM_FLOAT
Specifies floating-point PCM data.- Since:
- 1.7
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ULAW
public static final AudioFormat.Encoding ULAW
Specifies u-law encoded data.
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ALAW
public static final AudioFormat.Encoding ALAW
Specifies a-law encoded data.
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Constructor Detail
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Encoding
public Encoding(String name)
Constructs a new encoding.- Parameters:
name- the name of the new type of encoding
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Method Detail
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equals
public final boolean equals(Object obj)
Indicates whether the specified object is equal to this encoding, returningtrueif the objects are equal.- Overrides:
equalsin classObject- Parameters:
obj- the reference object with which to compare- Returns:
trueif the specified object is equal to this encoding;falseotherwise- See Also:
Object.hashCode()
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hashCode
public final int hashCode()
Returns a hash code value for this encoding.- Overrides:
hashCodein classObject- Returns:
- a hash code value for this encoding
- See Also:
Object.equals(java.lang.Object)
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toString
public final String toString()
Provides theStringrepresentation of the encoding. ThisStringis the same name that was passed to the constructor. For the predefined encodings, the name is similar to the encoding's variable (field) name. For example,PCM_SIGNED.toString()returns the name "PCM_SIGNED".
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