detune-overflow.html

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

<!doctype html>

<html>

  <head>

    <title>Test Osc.detune Overflow</title>

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

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

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

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

  </head>

  <body>

    <script>

      const sampleRate = 44100;

      const renderLengthFrames = RENDER_QUANTUM_FRAMES;

      let audit = Audit.createTaskRunner();

      audit.define('detune overflow', async (task, should) => {

        let context =

            new OfflineAudioContext(1, renderLengthFrames, sampleRate);

        // This value of frequency and detune results in a computed frequency of

        // 440*2^(153600/1200) = 1.497e41.  The frequency needs to be clamped to

        // Nyquist.  But a sine wave at Nyquist frequency is all zeroes.  Verify

        // the output is 0.

        let osc = new OscillatorNode(context, {frequency: 440, detune: 153600});

        osc.connect(context.destination);

        let buffer = await context.startRendering();

        let output = buffer.getChannelData(0);

        should(output, 'Osc freq and detune outside nominal range')

            .beConstantValueOf(0);

        task.done();

});

      audit.run();

    </script>

  </body>

</html>