/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

module webaudio {
    interface [
        Conditional=WEB_AUDIO
    ] AudioParam {
        attribute float value;
        readonly attribute float minValue;
        readonly attribute float maxValue;
        readonly attribute float defaultValue;

        readonly attribute DOMString name;

        // FIXME: Could define units constants here (seconds, decibels, cents, etc.)...
        readonly attribute unsigned short units;

        // Parameter automation.
        void setValueAtTime(in float value, in float time);
        void linearRampToValueAtTime(in float value, in float time);
        void exponentialRampToValueAtTime(in float value, in float time);

        // Exponentially approach the target value with a rate having the given time constant.
        void setTargetValueAtTime(in float targetValue, in float time, in 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.
        void setValueCurveAtTime(in Float32Array values, in float time, in float duration);

        // Cancels all scheduled parameter changes with times greater than or equal to startTime.
        void cancelScheduledValues(in float startTime);
    };
}