/*
 * 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
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 */

// See https://webaudio.github.io/web-audio-api/#AudioParam
enum AutomationRate {
   "a-rate",
   "k-rate"
};

[Exposed=Window]
interface AudioParam {
    [RaisesException=Setter] attribute float value;
    [RaisesException=Setter] attribute AutomationRate automationRate;
    readonly attribute float defaultValue;

    // Nominal range for the value.
    readonly attribute float minValue;
    readonly attribute float maxValue;

    // Parameter automation.
    [RaisesException, MeasureAs=AudioParamSetValueAtTime] AudioParam setValueAtTime(float value, double time);
    [RaisesException, MeasureAs=AudioParamLinearRampToValueAtTime] AudioParam linearRampToValueAtTime(float value, double time);
    [RaisesException, MeasureAs=AudioParamExponentialRampToValueAtTime] AudioParam exponentialRampToValueAtTime(float value, double time);

    // Exponentially approach the target with a rate having the given time constant.
    [RaisesException, MeasureAs=AudioParamSetTargetAtTime] AudioParam setTargetAtTime(float target, double time, 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.
    [RaisesException, MeasureAs=AudioParamSetValueCurveAtTime] AudioParam setValueCurveAtTime(sequence<float> values, double time, double duration);

    // Cancels all scheduled parameter changes with times greater than or equal to startTime.
    [RaisesException, MeasureAs=AudioParamCancelScheduledValues] AudioParam cancelScheduledValues(double startTime);

    // Cancel scheduled parameter changes and hold the last value
    [RaisesException, MeasureAs=AudioParamCancelAndHoldAtTime] AudioParam cancelAndHoldAtTime(double startTime);

};