1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 [ 30 WillBeGarbageCollected, 31 Conditional=WEB_AUDIO 32 ] interface AudioParam { 33 attribute float value; 34 readonly attribute float minValue; 35 readonly attribute float maxValue; 36 readonly attribute float defaultValue; 37 38 readonly attribute DOMString name; 39 40 // FIXME: Could define units constants here (seconds, decibels, cents, etc.)... 41 readonly attribute unsigned short units; 42 43 // Parameter automation. 44 void setValueAtTime(float value, double time); 45 void linearRampToValueAtTime(float value, double time); 46 [RaisesException] void exponentialRampToValueAtTime(float value, double time); 47 48 // Exponentially approach the target with a rate having the given time constant. 49 void setTargetAtTime(float target, double time, double timeConstant); 50 51 // Sets an array of arbitrary parameter values starting at time for the given duration. 52 // The number of values will be scaled to fit into the desired duration. 53 void setValueCurveAtTime(Float32Array values, double time, double duration); 54 55 // Cancels all scheduled parameter changes with times greater than or equal to startTime. 56 void cancelScheduledValues(double startTime); 57 58 }; 59
