channel-mode-interp-basic.html

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This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audionode-interface/channel-mode-interp-basic.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>

      Test Setting of channelCountMode and channelInterpretation

    </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">

      // Fairly arbitrary sample rate and number of frames, except the number of

      // frames should be more than a few render quantums.

      let sampleRate = 16000;

      let renderFrames = 10 * 128;

      let audit = Audit.createTaskRunner();

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

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

        let node = context.createGain();

        // Set a new interpretation and verify that it changed.

        node.channelInterpretation = 'discrete';

        let value = node.channelInterpretation;

        should(value, 'node.channelInterpretation').beEqualTo('discrete');

        node.connect(context.destination);

        context.startRendering()

            .then(function(buffer) {

              // After rendering, the value should have been changed.

              should(

                  node.channelInterpretation,

                  'After rendering node.channelInterpretation')

                  .beEqualTo('discrete');

})

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

});

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

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

        let node = context.createGain();

        // Set a new mode and verify that it changed.

        node.channelCountMode = 'explicit';

        let value = node.channelCountMode;

        should(value, 'node.channelCountMode').beEqualTo('explicit');

        node.connect(context.destination);

        context.startRendering()

            .then(function(buffer) {

              // After rendering, the value should have been changed.

              should(

                  node.channelCountMode,

                  'After rendering node.channelCountMode')

                  .beEqualTo('explicit');

})

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

});

      audit.run();

    </script>

  </body>

</html>