audioparam-setValueCurveAtTime.html

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

<!DOCTYPE html>

<html>

  <head>

    <title>

      Test AudioParam.setValueCurveAtTime

    </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 for each time

      // interval call setValueCurveAtTime() to set the values for the duration

      // of the interval.  Each curve is a sine wave, and we assume that the

      // time interval is not an exact multiple of the period. This causes a

      // discontinuity between time intervals which is used to test timing.

      // Number of tests to run.

      let numberOfTests = 20;

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

      // result. Because of the linear interpolation, the rendered curve isn't

      // exactly the same as the reference.  This value is experimentally

      // determined.

      let maxAllowedError = 3.7194e-6;

      // The amplitude of the sine wave.

      let sineAmplitude = 1;

      // Frequency of the sine wave.

      let freqHz = 440;

      // Curve to use for setValueCurveAtTime().

      let curve;

      // Sets the curve data for the entire time interval.

      function automation(value, startTime, endTime) {

        gainNode.gain.setValueCurveAtTime(

            curve, startTime, endTime - startTime);

      audit.define(

            label: 'test',

            description: 'AudioParam setValueCurveAtTime() functionality.'

},

          function(task, should) {

            // The curve of values to use.

            curve = createSineWaveArray(

                timeInterval, freqHz, sineAmplitude, sampleRate);

            createAudioGraphAndTest(

                task, should, numberOfTests, sineAmplitude,

                function(k) {

                  // Don't need to set the value.

},

                automation, 'setValueCurveAtTime()', maxAllowedError,

                createReferenceSineArray,

                2 * Math.PI * sineAmplitude * freqHz / sampleRate,

                differenceErrorMetric);

});

      audit.run();

    </script>

  </body>

</html>