Added in API level 28

AudioPresentation

Kotlin |Java

public final class AudioPresentation
extends Object implements Parcelable

java.lang.Object
↳	android.media.AudioPresentation

The AudioPresentation class encapsulates the information that describes an audio presentation which is available in next generation audio content. Used by MediaExtractor MediaExtractor.getAudioPresentations(int) and AudioTrack AudioTrack.setPresentation(AudioPresentation) to query available presentations and to select one, respectively. A list of available audio presentations in a media source can be queried using MediaExtractor.getAudioPresentations(int). This list can be presented to a user for selection. An AudioPresentation can be passed to an offloaded audio decoder via AudioTrack.setPresentation(AudioPresentation) to request decoding of the selected presentation. An audio stream may contain multiple presentations that differ by language, accessibility, end point mastering and dialogue enhancement. An audio presentation may also have a set of description labels in different languages to help the user to make an informed selection. Applications that parse media streams and extract presentation information on their own can create instances of AudioPresentation by using AudioPresentation.Builder class.

Summary

Nested classes
`class`	`AudioPresentation.Builder` A builder class for creating `AudioPresentation` objects.

Constants
`int`	`CONTENT_COMMENTARY` Audio presentation content classifier: Commentary.
`int`	`CONTENT_DIALOG` Audio presentation content classifier: Dialog.
`int`	`CONTENT_EMERGENCY` Audio presentation content classifier: Emergency.
`int`	`CONTENT_HEARING_IMPAIRED` Audio presentation content classifier: Hearing impaired.
`int`	`CONTENT_MAIN` Audio presentation classifier: Complete main.
`int`	`CONTENT_MUSIC_AND_EFFECTS` Audio presentation content classifier: Music and effects.
`int`	`CONTENT_UNKNOWN` Audio presentation classifier: Unknown.
`int`	`CONTENT_VISUALLY_IMPAIRED` Audio presentation content classifier: Visually impaired.
`int`	`CONTENT_VOICEOVER` Audio presentation content classifier: Voice over.
`int`	`MASTERED_FOR_3D` Three-dimensional (e.g. 5.1.2) speaker layout.
`int`	`MASTERED_FOR_HEADPHONE` Prerendered for headphone playback.
`int`	`MASTERED_FOR_STEREO` Stereo speaker layout.
`int`	`MASTERED_FOR_SURROUND` Two-dimensional (e.g. 5.1) speaker layout.
`int`	`MASTERING_NOT_INDICATED` No preferred reproduction channel layout.
`int`	`PRESENTATION_ID_UNKNOWN` Unknown audio presentation ID, this indicates audio presentation ID is not selected.
`int`	`PROGRAM_ID_UNKNOWN` Unknown audio program ID, this indicates audio program ID is not selected.

Inherited constants

From interface android.os.Parcelable

`int`	`CONTENTS_FILE_DESCRIPTOR` Descriptor bit used with `describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor.
`int`	`PARCELABLE_WRITE_RETURN_VALUE` Flag for use with `writeToParcel(Parcel, int)`: the object being written is a return value, that is the result of a function such as "`Parcelable someFunction()`", "`void someFunction(out Parcelable)`", or "`void someFunction(inout Parcelable)`".

Fields
`public static final Creator<AudioPresentation>`	`CREATOR`

Public methods
`int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`boolean`	`equals(Object o)` Indicates whether some other object is "equal to" this one.
`Map<Locale, String>`	`getLabels()`
`Locale`	`getLocale()`
`int`	`getMasteringIndication()`
`int`	`getPresentationId()` Returns presentation ID used by the framework to select an audio presentation rendered by a decoder.
`int`	`getProgramId()` Returns program ID used by the framework to select an audio presentation rendered by a decoder.
`boolean`	`hasAudioDescription()` Indicates whether an audio description for the visually impaired is available.
`boolean`	`hasDialogueEnhancement()` Indicates whether dialogue enhancement is available.
`boolean`	`hasSpokenSubtitles()` Indicates whether spoken subtitles for the visually impaired are available.
`int`	`hashCode()` Returns a hash code value for the object.
`String`	`toString()` Returns a string representation of the object.
`void`	`writeToParcel(Parcel dest, int flags)` Flatten this object in to a Parcel.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

From interface


        
          android.os.Parcelable

`abstract int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`abstract void`	`writeToParcel(Parcel dest, int flags)` Flatten this object in to a Parcel.

Constants

CONTENT_COMMENTARY

Added in API level 31

public static final int CONTENT_COMMENTARY

Audio presentation content classifier: Commentary.

Constant Value: 5 (0x00000005)

CONTENT_DIALOG

Added in API level 31

public static final int CONTENT_DIALOG

Audio presentation content classifier: Dialog.

Constant Value: 4 (0x00000004)

CONTENT_EMERGENCY

Added in API level 31

public static final int CONTENT_EMERGENCY

Audio presentation content classifier: Emergency.

Constant Value: 6 (0x00000006)

CONTENT_HEARING_IMPAIRED

Added in API level 31

public static final int CONTENT_HEARING_IMPAIRED

Audio presentation content classifier: Hearing impaired.

Constant Value: 3 (0x00000003)

CONTENT_MAIN

Added in API level 31

public static final int CONTENT_MAIN

Audio presentation classifier: Complete main.

Constant Value: 0 (0x00000000)

CONTENT_MUSIC_AND_EFFECTS

Added in API level 31

public static final int CONTENT_MUSIC_AND_EFFECTS

Audio presentation content classifier: Music and effects.

Constant Value: 1 (0x00000001)

CONTENT_UNKNOWN

Added in API level 31

public static final int CONTENT_UNKNOWN

Audio presentation classifier: Unknown.

Constant Value: -1 (0xffffffff)

CONTENT_VISUALLY_IMPAIRED

Added in API level 31

public static final int CONTENT_VISUALLY_IMPAIRED

Audio presentation content classifier: Visually impaired.

Constant Value: 2 (0x00000002)

CONTENT_VOICEOVER

Added in API level 31

public static final int CONTENT_VOICEOVER

Audio presentation content classifier: Voice over.

Constant Value: 7 (0x00000007)

MASTERED_FOR_3D

Added in API level 28

public static final int MASTERED_FOR_3D

Three-dimensional (e.g. 5.1.2) speaker layout.

See also:

AudioPresentation.Builder.setMasteringIndication(int)

Constant Value: 3 (0x00000003)

MASTERED_FOR_HEADPHONE

Added in API level 28

public static final int MASTERED_FOR_HEADPHONE

Prerendered for headphone playback.

See also:

AudioPresentation.Builder.setMasteringIndication(int)

Constant Value: 4 (0x00000004)

MASTERED_FOR_STEREO

Added in API level 28

public static final int MASTERED_FOR_STEREO

Stereo speaker layout.

See also:

AudioPresentation.Builder.setMasteringIndication(int)

Constant Value: 1 (0x00000001)

MASTERED_FOR_SURROUND

Added in API level 28

public static final int MASTERED_FOR_SURROUND

Two-dimensional (e.g. 5.1) speaker layout.

See also:

AudioPresentation.Builder.setMasteringIndication(int)

Constant Value: 2 (0x00000002)

MASTERING_NOT_INDICATED

Added in API level 28

public static final int MASTERING_NOT_INDICATED

No preferred reproduction channel layout.

See also:

AudioPresentation.Builder.setMasteringIndication(int)

Constant Value: 0 (0x00000000)

PRESENTATION_ID_UNKNOWN

Added in API level 34

public static final int PRESENTATION_ID_UNKNOWN

Unknown audio presentation ID, this indicates audio presentation ID is not selected.

Constant Value: -1 (0xffffffff)

PROGRAM_ID_UNKNOWN

Added in API level 34

public static final int PROGRAM_ID_UNKNOWN

Unknown audio program ID, this indicates audio program ID is not selected.

Constant Value: -1 (0xffffffff)

Fields

CREATOR

Added in API level 34

public static final Creator<AudioPresentation> CREATOR

Public methods

describeContents

Added in API level 34

public int describeContents ()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel, int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.

Returns
`int`	a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either `0` or `CONTENTS_FILE_DESCRIPTOR`

equals

Added in API level 28

public boolean equals (Object o)

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

It is reflexive: for any non-null reference value x, x.equals(x) should return true.
It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters
`o`	`Object`: the reference object with which to compare.

Returns
`boolean`	`true` if this object is the same as the obj argument; `false` otherwise.

getLabels

Added in API level 28

public Map<Locale, String> getLabels ()

Returns
`Map<Locale, String>`	a map of available text labels for this presentation. Each label is indexed by its locale corresponding to the language code as specified by ISO 639-2. Either ISO 639-2/B or ISO 639-2/T could be used.

getLocale

Added in API level 28

public Locale getLocale ()

Returns
`Locale`	the locale corresponding to audio presentation's ISO 639-1/639-2 language code.

getMasteringIndication

Added in API level 28

public int getMasteringIndication ()

Returns
`int`	the mastering indication of the audio presentation. See `AudioPresentation.MASTERING_NOT_INDICATED`, `AudioPresentation.MASTERED_FOR_STEREO`, `AudioPresentation.MASTERED_FOR_SURROUND`, `AudioPresentation.MASTERED_FOR_3D`, `AudioPresentation.MASTERED_FOR_HEADPHONE` Value is `MASTERING_NOT_INDICATED`, `MASTERED_FOR_STEREO`, `MASTERED_FOR_SURROUND`, `MASTERED_FOR_3D`, or `MASTERED_FOR_HEADPHONE`

getPresentationId

Added in API level 29

public int getPresentationId ()

Returns presentation ID used by the framework to select an audio presentation rendered by a decoder. Presentation ID is typically sequential, but does not have to be.

Returns
`int`

getProgramId

Added in API level 29

public int getProgramId ()

Returns program ID used by the framework to select an audio presentation rendered by a decoder. Program ID can be used to further uniquely identify the presentation to a decoder.

Returns
`int`

hasAudioDescription

Added in API level 28

public boolean hasAudioDescription ()

Indicates whether an audio description for the visually impaired is available.

Returns
`boolean`	`true` if audio description is available.

hasDialogueEnhancement

Added in API level 28

public boolean hasDialogueEnhancement ()

Indicates whether dialogue enhancement is available.

Returns
`boolean`	`true` if dialogue enhancement is available.

hasSpokenSubtitles

Added in API level 28

public boolean hasSpokenSubtitles ()

Indicates whether spoken subtitles for the visually impaired are available.

Returns
`boolean`	`true` if spoken subtitles are available.

hashCode

Added in API level 28

public int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Returns
`int`	a hash code value for this object.

toString

Added in API level 28

public String toString ()

Returns a string representation of the object.

Returns
`String`	a string representation of the object.

writeToParcel

Added in API level 34

public void writeToParcel (Parcel dest, 
                int flags)

Flatten this object in to a Parcel.

Parameters
`dest`	`Parcel`: This value cannot be `null`.
`flags`	`int`: Additional flags about how the object should be written. May be 0 or `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`. Value is either `0` or a combination of `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES

AudioPresentation

Summary

Nested classes

Constants

Inherited constants

Fields

Public methods

Inherited methods

Constants

CONTENT_COMMENTARY

CONTENT_DIALOG

CONTENT_EMERGENCY

CONTENT_HEARING_IMPAIRED

CONTENT_MAIN

CONTENT_MUSIC_AND_EFFECTS

CONTENT_UNKNOWN

CONTENT_VISUALLY_IMPAIRED

CONTENT_VOICEOVER

MASTERED_FOR_3D

MASTERED_FOR_HEADPHONE

MASTERED_FOR_STEREO

MASTERED_FOR_SURROUND

MASTERING_NOT_INDICATED

PRESENTATION_ID_UNKNOWN

PROGRAM_ID_UNKNOWN

Fields

CREATOR

Public methods

describeContents

equals

getLabels

getLocale

getMasteringIndication

getPresentationId

getProgramId

hasAudioDescription

hasDialogueEnhancement

hasSpokenSubtitles

hashCode

toString

writeToParcel