michael@0: /* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/.
michael@0:  *
michael@0:  * The origin of this IDL file is
michael@0:  * https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html
michael@0:  *
michael@0:  * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
michael@0:  * liability, trademark and document use rules apply.
michael@0:  */
michael@0: 
michael@0: interface AudioParam {
michael@0: 
michael@0:     attribute float value;
michael@0:     readonly attribute float defaultValue;
michael@0: 
michael@0:     // Parameter automation. 
michael@0:     [Throws]
michael@0:     void setValueAtTime(float value, double startTime);
michael@0:     [Throws]
michael@0:     void linearRampToValueAtTime(float value, double endTime);
michael@0:     [Throws]
michael@0:     void exponentialRampToValueAtTime(float value, double endTime);
michael@0: 
michael@0:     // Exponentially approach the target value with a rate having the given time constant. 
michael@0:     [Throws]
michael@0:     void setTargetAtTime(float target, double startTime, double timeConstant);
michael@0: 
michael@0:     // Sets an array of arbitrary parameter values starting at time for the given duration. 
michael@0:     // The number of values will be scaled to fit into the desired duration. 
michael@0:     [Throws]
michael@0:     void setValueCurveAtTime(Float32Array values, double startTime, double duration);
michael@0: 
michael@0:     // Cancels all scheduled parameter changes with times greater than or equal to startTime. 
michael@0:     [Throws]
michael@0:     void cancelScheduledValues(double startTime);
michael@0: 
michael@0: };