AudioFormat
public static class AudioFormat.Encoding extends Object
Encoding
class 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_SIGNED
or PCM_UNSIGNED
. Service providers can create new encodings, such as compressed audio formats, and make these available through the AudioSystem
class.
The Encoding
class is static, so that all AudioFormat
objects 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.
Modifier and Type | Field | Description |
---|---|---|
static final AudioFormat.Encoding |
ALAW |
Specifies a-law encoded data. |
static final AudioFormat.Encoding |
PCM_FLOAT |
Specifies floating-point PCM data. |
static final AudioFormat.Encoding |
PCM_SIGNED |
Specifies signed, linear PCM data. |
static final AudioFormat.Encoding |
PCM_UNSIGNED |
Specifies unsigned, linear PCM data. |
static final AudioFormat.Encoding |
ULAW |
Specifies u-law encoded data. |
Constructor | Description |
---|---|
Encoding |
Constructs a new encoding. |
Modifier and Type | Method | Description |
---|---|---|
final boolean |
equals |
Indicates whether the specified object is equal to this encoding, returning true if the objects are equal. |
final int |
hashCode() |
Returns a hash code value for this encoding. |
final String |
toString() |
Returns encoding's name as the string representation of the encoding. |
public static final AudioFormat.Encoding PCM_SIGNED
public static final AudioFormat.Encoding PCM_UNSIGNED
public static final AudioFormat.Encoding PCM_FLOAT
public static final AudioFormat.Encoding ULAW
public static final AudioFormat.Encoding ALAW
public Encoding(String name)
name
- the name of the new type of encodingpublic final boolean equals(Object obj)
true
if the objects are equal.public final int hashCode()
public final String toString()
PCM_SIGNED.toString()
returns the name "PCM_SIGNED".
© 1993, 2023, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/sound/sampled/AudioFormat.Encoding.html