test-pannernode-automation.html

Enable keyboard shortcuts

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

<!doctype html>

<meta charset=utf-8>

<title></title>

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

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

<script>

// This value is purposefuly not aligned on a 128-block boundary so that we test

// that the PannerNode position audioparam is a-rate.

const POSITION_CHANGE_FRAME = 1111;

promise_test(function(t) {

  var ac = new OfflineAudioContext(2, 2048, 44100);

  var panner = ac.createPanner();

  panner.positionX.value = -1;

  panner.positionY.value = -1;

  panner.positionZ.value = 1;

  panner.positionX.setValueAtTime(1, POSITION_CHANGE_FRAME/ac.sampleRate);

  var osc = ac.createOscillator();

  osc.connect(panner);

  panner.connect(ac.destination);

  osc.start()

  return ac.startRendering().then(function(buffer) {

    var left = buffer.getChannelData(0);

    var right = buffer.getChannelData(1);

    for (var i = 0; i < 2048; ++i) {

      if (i < POSITION_CHANGE_FRAME) {

        assert_true(Math.abs(left[i]) >= Math.abs(right[i]), "index " + i + " should be on the left");

      } else {

        assert_true(Math.abs(left[i]) < Math.abs(right[i]), "index " + i + " should be on the right");

});

}, "PannerNode AudioParam automation works properly");

</script>