org.htmlunit.javascript.host.media

Class BaseAudioContext

java.lang.Object

org.htmlunit.corejs.javascript.ScriptableObject

org.htmlunit.javascript.HtmlUnitScriptable

org.htmlunit.javascript.host.event.EventTarget

org.htmlunit.javascript.host.media.BaseAudioContext

All Implemented Interfaces:

Serializable, Cloneable, org.htmlunit.corejs.javascript.ConstProperties, org.htmlunit.corejs.javascript.debug.DebuggableObject, org.htmlunit.corejs.javascript.Scriptable, org.htmlunit.corejs.javascript.SymbolScriptable

Direct Known Subclasses:

AudioContext, OfflineAudioContext

public class BaseAudioContext
extends EventTarget

A JavaScript object for BaseAudioContext.

Author:

Ahmed Ashour, Ronald Brill

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.htmlunit.corejs.javascript.ScriptableObject

org.htmlunit.corejs.javascript.ScriptableObject.KeyComparator

Field Summary

Fields inherited from class org.htmlunit.corejs.javascript.ScriptableObject

CONST, DONTENUM, EMPTY, PERMANENT, READONLY, UNINITIALIZED_CONST

Fields inherited from interface org.htmlunit.corejs.javascript.Scriptable

NOT_FOUND

Constructor Summary

Constructors

Constructor and Description
BaseAudioContext()

Method Summary

Modifier and Type	Method and Description
AudioBuffer	createBuffer()
AudioBufferSourceNode	createBufferSource()
GainNode	createGain()
org.htmlunit.corejs.javascript.NativePromise	decodeAudioData(org.htmlunit.corejs.javascript.typedarrays.NativeArrayBuffer buffer, org.htmlunit.corejs.javascript.Function success, org.htmlunit.corejs.javascript.Function error) The decodeAudioData() method of the BaseAudioContext Interface is used to asynchronously decode audio file data contained in an ArrayBuffer.
void	jsConstructor() Creates an instance.

Methods inherited from class org.htmlunit.javascript.host.event.EventTarget

addEventListener, clearEventListenersContainer, dispatchEvent, executeEventLocally, fireEvent, getEventHandler, getEventListenersContainer, hasEventHandlers, isEventHandlerOnWindow, removeEventListener, setEventHandler

Methods inherited from class org.htmlunit.javascript.HtmlUnitScriptable

clone, equivalentValues, get, getBrowserVersion, getClassName, getDefaultValue, getDomNodeOrDie, getDomNodeOrNull, getPrototype, getScriptableFor, getWindow, getWindow, getWindowFromTopCallScope, getWithPreemption, has, hasInstance, initParentScope, makeScriptableFor, put, setClassName, setDomNode, setDomNode, setParentScope, setupPromise, setupRejectedPromise

Methods inherited from class org.htmlunit.corejs.javascript.ScriptableObject

applyDescriptorToAttributeBitset, associateValue, avoidObjectDetection, buildDataDescriptor, callMethod, callMethod, checkPropertyChange, checkPropertyDefinition, defineClass, defineClass, defineClass, defineConst, defineConstProperty, defineFunctionProperties, defineOwnProperties, defineOwnProperty, defineOwnProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, delete, delete, delete, deleteProperty, deleteProperty, deleteProperty, ensureScriptable, ensureScriptableObject, ensureSymbolScriptable, get, get, get, getAllIds, getArrayPrototype, getAssociatedValue, getAttributes, getAttributes, getAttributes, getAttributes, getAttributes, getClassPrototype, getDefaultValue, getExternalArrayData, getExternalArrayLength, getFunctionPrototype, getGeneratorFunctionPrototype, getGetterOrSetter, getGetterOrSetter, getIds, getObjectPrototype, getOwnPropertyDescriptor, getParentScope, getProperty, getProperty, getProperty, getPropertyIds, getPrototype, getTopLevelScope, getTopScopeValue, getTypedProperty, getTypedProperty, getTypeOf, has, has, hasProperty, hasProperty, hasProperty, isAccessorDescriptor, isConst, isDataDescriptor, isEmpty, isExtensible, isFalse, isGenericDescriptor, isGetterOrSetter, isSealed, isTrue, preventExtensions, put, put, putConst, putConstProperty, putProperty, putProperty, putProperty, querySlot, redefineProperty, sameValue, sealObject, setAttributes, setAttributes, setAttributes, setAttributes, setAttributes, setCommonDescriptorProperties, setExternalArrayData, setGetterOrSetter, setPrototype, size

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseAudioContext

public BaseAudioContext()

Method Detail

jsConstructor

public void jsConstructor()

Creates an instance.

Overrides:

jsConstructor in class EventTarget

createBufferSource

public AudioBufferSourceNode createBufferSource()

Returns:

a new AudioBufferSourceNode, which can be used to play audio data contained within an AudioBuffer object.

createBuffer

public AudioBuffer createBuffer()

Returns:

new, empty AudioBuffer object, which can then be populated by data, and played via an AudioBufferSourceNode.

createGain

public GainNode createGain()

Returns:

a GainNode, which can be used to control the overall gain (or volume) of the audio graph.

decodeAudioData

public org.htmlunit.corejs.javascript.NativePromise decodeAudioData(org.htmlunit.corejs.javascript.typedarrays.NativeArrayBuffer buffer,
                                                                    org.htmlunit.corejs.javascript.Function success,
                                                                    org.htmlunit.corejs.javascript.Function error)

The decodeAudioData() method of the BaseAudioContext Interface is used to asynchronously decode audio file data contained in an ArrayBuffer. In this case the ArrayBuffer is loaded from XMLHttpRequest and FileReader. The decoded AudioBuffer is resampled to the AudioContext's sampling rate, then passed to a callback or promise.

Parameters:

buffer - An ArrayBuffer containing the audio data to be decoded, usually grabbed from XMLHttpRequest, WindowOrWorkerGlobalScope.fetch() or FileReader

success - A callback function to be invoked when the decoding successfully finishes. The single argument to this callback is an AudioBuffer representing the decodedData (the decoded PCM audio data). Usually you'll want to put the decoded data into an AudioBufferSourceNode, from which it can be played and manipulated how you want.

error - An optional error callback, to be invoked if an error occurs when the audio data is being decoded.

Returns:

the promise or null