audioparam-setTargetAtTime.html

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This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audioparam-interface/audioparam-setTargetAtTime.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>

      Test AudioParam.setTargetAtTime

    </title>

    <script src="/resources/testharness.js"></script>

    <script src="/resources/testharnessreport.js"></script>

    <script src="/webaudio/resources/audit-util.js"></script>

    <script src="/webaudio/resources/audit.js"></script>

    <script src="/webaudio/resources/audioparam-testing.js"></script>

  </head>

  <body>

    <script id="layout-test-code">

      let audit = Audit.createTaskRunner();

      // Play a long DC signal out through an AudioGainNode, and call

      // setValueAtTime() and setTargetAtTime at regular intervals to set the

      // starting value and the target value. Each time interval has a ramp with

      // a different starting and target value so that there is a discontinuity

      // at each time interval boundary. The discontinuity is for testing

      // timing.  Also, we alternate between an increasing and decreasing ramp

      // for each interval.

      // Number of tests to run.

      let numberOfTests = 100;

      // Max allowed difference between the rendered data and the expected

      // result.

      let maxAllowedError = 6.5683e-4

      // The AudioGainNode starts with this value instead of the default value.

      let initialValue = 100;

      // Set the gain node value to the specified value at the specified time.

      function setValue(value, time) {

        gainNode.gain.setValueAtTime(value, time);

      // Generate an exponential approach starting at |startTime| with a target

      // value of |value|.

      function automation(value, startTime, endTime){

          // endTime is not used for setTargetAtTime.

          gainNode.gain.setTargetAtTime(value, startTime, timeConstant)}

      audit.define(

            label: 'test',

            description: 'AudioParam setTargetAtTime() functionality.'

},

          function(task, should) {

            createAudioGraphAndTest(

                task, should, numberOfTests, initialValue, setValue, automation,

                'setTargetAtTime()', maxAllowedError,

                createExponentialApproachArray);

});

      audit.run();

    </script>

  </body>

</html>