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/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at
* The origin of this IDL file is
* Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
* liability, trademark and document use rules apply.
enum AutomationRate {
interface AudioParam {
attribute float value;
readonly attribute float defaultValue;
readonly attribute float minValue;
readonly attribute float maxValue;
// Parameter automation.
AudioParam setValueAtTime(float value, double startTime);
AudioParam linearRampToValueAtTime(float value, double endTime);
AudioParam exponentialRampToValueAtTime(float value, double endTime);
// Exponentially approach the target value with a rate having the given time constant.
AudioParam setTargetAtTime(float target, double startTime, double timeConstant);
// Sets an array of arbitrary parameter values starting at time for the given duration.
// The number of values will be scaled to fit into the desired duration.
AudioParam setValueCurveAtTime(sequence<float> values, double startTime, double duration);
// Cancels all scheduled parameter changes with times greater than or equal to startTime.
AudioParam cancelScheduledValues(double startTime);
// Mozilla extension
partial interface AudioParam {
// The ID of the AudioNode this AudioParam belongs to.
readonly attribute unsigned long parentNodeId;
// The name of the AudioParam
readonly attribute DOMString name;
partial interface AudioParam {
// This attribute is used for mochitest only.
readonly attribute boolean isTrackSuspended;