com.gargoylesoftware.htmlunit.javascript.host.media

Class AudioContext

java.lang.Object

net.sourceforge.htmlunit.corejs.javascript.ScriptableObject

com.gargoylesoftware.htmlunit.javascript.HtmlUnitScriptable

com.gargoylesoftware.htmlunit.javascript.SimpleScriptable

com.gargoylesoftware.htmlunit.javascript.host.event.EventTarget

com.gargoylesoftware.htmlunit.javascript.host.media.BaseAudioContext

com.gargoylesoftware.htmlunit.javascript.host.media.AudioContext

All Implemented Interfaces:

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

public class AudioContext
extends BaseAudioContext

A JavaScript object for AudioContext.

Author:

Ahmed Ashour, Ronald Brill

See Also:

Serialized Form

Nested Class Summary

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

net.sourceforge.htmlunit.corejs.javascript.ScriptableObject.KeyComparator

Field Summary

Fields inherited from class net.sourceforge.htmlunit.corejs.javascript.ScriptableObject

CONST, DONTENUM, EMPTY, PERMANENT, READONLY, UNINITIALIZED_CONST

Fields inherited from interface net.sourceforge.htmlunit.corejs.javascript.Scriptable

NOT_FOUND

Constructor Summary

Constructors

Constructor and Description
AudioContext() Creates an instance.

Method Summary

Modifier and Type	Method and Description
GainNode	createGain()
Promise	decodeAudioData(net.sourceforge.htmlunit.corejs.javascript.typedarrays.NativeArrayBuffer buffer, net.sourceforge.htmlunit.corejs.javascript.Function success, net.sourceforge.htmlunit.corejs.javascript.Function error) The decodeAudioData() method of the BaseAudioContext Interface is used to asynchronously decode audio file data contained in an ArrayBuffer.

Methods inherited from class com.gargoylesoftware.htmlunit.javascript.host.media.BaseAudioContext

createBuffer, createBufferSource

Methods inherited from class com.gargoylesoftware.htmlunit.javascript.host.event.EventTarget

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

Methods inherited from class com.gargoylesoftware.htmlunit.javascript.SimpleScriptable

clone, equivalentValues, get, getBrowserVersion, getDefaultValue, getDomNodeOrDie, getDomNodeOrNull, getPrototype, getScriptableFor, getStartingScope, getWindow, getWindow, getWithPreemption, has, hasInstance, initParentScope, makeScriptableFor, setCaseSensitive, setDomNode, setDomNode, setHtmlElement

Methods inherited from class com.gargoylesoftware.htmlunit.javascript.HtmlUnitScriptable

defineFunctionProperties, defineProperty, getClassName, put, setClassName, setParentScope

Methods inherited from class net.sourceforge.htmlunit.corejs.javascript.ScriptableObject

applyDescriptorToAttributeBitset, associateValue, avoidObjectDetection, buildDataDescriptor, callMethod, callMethod, checkPropertyChange, checkPropertyDefinition, defineClass, defineClass, defineClass, defineConst, defineConstProperty, defineOwnProperties, defineOwnProperty, defineOwnProperty, defineProperty, defineProperty, defineProperty, defineProperty, defineProperty, delete, delete, delete, deleteProperty, deleteProperty, ensureScriptable, ensureScriptableObject, ensureSymbolScriptable, get, get, get, getAllIds, getArrayPrototype, getAssociatedValue, getAttributes, getAttributes, getAttributes, getAttributes, getAttributes, getClassPrototype, getDefaultValue, getExternalArrayData, getExternalArrayLength, getFunctionPrototype, getGeneratorFunctionPrototype, 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

AudioContext

public AudioContext()

Creates an instance.

Method Detail

decodeAudioData

public Promise decodeAudioData(net.sourceforge.htmlunit.corejs.javascript.typedarrays.NativeArrayBuffer buffer,
                               net.sourceforge.htmlunit.corejs.javascript.Function success,
                               net.sourceforge.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

createGain

public GainNode createGain()

Returns:

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