audiosource-time-limits.html

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This test has a WPT meta file that expects 2 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiosource-time-limits.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>

      Test Scheduled Sources with Huge Time Limits

    </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 sampleRate = 48000;

      let renderFrames = 1000;

      let audit = Audit.createTaskRunner();

      audit.define('buffersource: huge stop time', (task, should) => {

        // We only need to generate a small number of frames for this test.

        let context = new OfflineAudioContext(1, renderFrames, sampleRate);

        let src = context.createBufferSource();

        // Constant source of amplitude 1, looping.

        src.buffer = createConstantBuffer(context, 1, 1);

        src.loop = true;

        // Create the graph and go!

        let endTime = 1e300;

        src.connect(context.destination);

        src.start();

        src.stop(endTime);

        context.startRendering()

            .then(function(resultBuffer) {

              let result = resultBuffer.getChannelData(0);

              should(

                  result, 'Output from AudioBufferSource.stop(' + endTime + ')')

                  .beConstantValueOf(1);

})

            .then(() => task.done());

});

      audit.define('oscillator: huge stop time', (task, should) => {

        // We only need to generate a small number of frames for this test.

        let context = new OfflineAudioContext(1, renderFrames, sampleRate);

        let src = context.createOscillator();

        // Create the graph and go!

        let endTime = 1e300;

        src.connect(context.destination);

        src.start();

        src.stop(endTime);

        context.startRendering()

            .then(function(resultBuffer) {

              let result = resultBuffer.getChannelData(0);

              // The buffer should not be empty.  Just find the max and verify

              // that it's not zero.

              let max = Math.max.apply(null, result);

              should(

                  max, 'Peak amplitude from oscillator.stop(' + endTime + ')')

                  .beGreaterThan(0);

})

            .then(() => task.done());

});

      audit.run();

    </script>

  </body>

</html>