audioparam-large-endtime.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-audioparam-interface/audioparam-large-endtime.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>

      AudioParam with Huge End Time

    </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>

  </head>

  <body>

    <script id="layout-test-code">

      let sampleRate = 48000;

      // Render for some small (but fairly arbitrary) time.

      let renderDuration = 0.125;

      // Any huge time value that won't fit in a size_t (2^64 on a 64-bit

      // machine).

      let largeTime = 1e300;

      let audit = Audit.createTaskRunner();

      // See crbug.com/582701.  Create an audioparam with a huge end time and

      // verify that to automation is run.  We don't care about the actual

      // results, just that it runs.

      // Test linear ramp with huge end time

      audit.define('linearRamp', (task, should) => {

        let graph = createGraph();

        graph.gain.gain.linearRampToValueAtTime(0.1, largeTime);

        graph.source.start();

        graph.context.startRendering()

            .then(function(buffer) {

              should(true, 'linearRampToValue(0.1, ' + largeTime + ')')

                  .message('successfully rendered', 'unsuccessfully rendered');

})

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

});

      // Test exponential ramp with huge end time

      audit.define('exponentialRamp', (task, should) => {

        let graph = createGraph();

        graph.gain.gain.exponentialRampToValueAtTime(.1, largeTime);

        graph.source.start();

        graph.context.startRendering()

            .then(function(buffer) {

              should(true, 'exponentialRampToValue(0.1, ' + largeTime + ')')

                  .message('successfully rendered', 'unsuccessfully rendered');

})

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

});

      audit.run();

      // Create the graph and return the context, the source, and the gain node.

      function createGraph() {

        let context =

            new OfflineAudioContext(1, renderDuration * sampleRate, sampleRate);

        let src = context.createBufferSource();

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

        src.loop = true;

        let gain = context.createGain();

        src.connect(gain);

        gain.connect(context.destination);

        gain.gain.setValueAtTime(1, 0.1 / sampleRate);

        return {context: context, gain: gain, source: src};

    </script>

  </body>

</html>