chromium/third_party/blink/renderer/modules/webaudio/audio_param.idl

/*
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 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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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);

};