gecko-dev/dom/webidl/AudioParam.webidl
Ehsan Akhgari 93ab39a5d3 Bug 803392 - Initial implementation of AudioParam; r=bzbarsky
This patch implements most of the semantics of AudioParam in a
templatized base class called AudioEventTimeline.  This is done in order
to make it possible to test this code from C++ without the need of
linking to libxul.  Basically we take everything that could depend on
libxul or is not suitable for a genertic implementation and put it in a
traits like type as a template argument.  Then the test creates mock
objects that conform to the argument interfaces, and tests the logic of
AudioEventTimeline.
2012-10-16 21:19:06 -04:00

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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 http://mozilla.org/MPL/2.0/.
*
* The origin of this IDL file is
* https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html
*
* Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
* liability, trademark and document use rules apply.
*/
[PrefControlled]
interface AudioParam {
attribute float value;
// readonly attribute float computedValue;
readonly attribute float minValue;
readonly attribute float maxValue;
readonly attribute float defaultValue;
// Parameter automation.
[Throws]
void setValueAtTime(float value, float startTime);
[Throws]
void linearRampToValueAtTime(float value, float endTime);
[Throws]
void exponentialRampToValueAtTime(float value, float endTime);
// Exponentially approach the target value with a rate having the given time constant.
[Throws]
void setTargetAtTime(float target, float startTime, float 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.
// [Throws]
// void setValueCurveAtTime(Float32Array values, float startTime, float duration);
// Cancels all scheduled parameter changes with times greater than or equal to startTime.
// void cancelScheduledValues(float startTime);
};