36 lines
1.2 KiB
HTML
36 lines
1.2 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title></title>
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<script src=/resources/testharness.js></script>
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<script src=/resources/testharnessreport.js></script>
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<script>
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// This value is purposefuly not aligned on a 128-block boundary so that we test
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// that the PannerNode position audioparam is a-rate.
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const POSITION_CHANGE_FRAME = 1111;
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promise_test(function(t) {
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var ac = new OfflineAudioContext(2, 2048, 44100);
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var panner = ac.createPanner();
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panner.positionX.value = -1;
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panner.positionY.value = -1;
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panner.positionZ.value = 1;
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panner.positionX.setValueAtTime(1, POSITION_CHANGE_FRAME/ac.sampleRate);
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var osc = ac.createOscillator();
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osc.connect(panner);
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panner.connect(ac.destination);
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osc.start()
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return ac.startRendering().then(function(buffer) {
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var left = buffer.getChannelData(0);
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var right = buffer.getChannelData(1);
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for (var i = 0; i < 2048; ++i) {
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if (i < POSITION_CHANGE_FRAME) {
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assert_true(Math.abs(left[i]) >= Math.abs(right[i]), "index " + i + " should be on the left");
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} else {
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assert_true(Math.abs(left[i]) < Math.abs(right[i]), "index " + i + " should be on the right");
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}
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}
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});
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}, "PannerNode AudioParam automation works properly");
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</script>
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