audiobuffersource-duration-loop.html

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This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-duration-loop.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>

      Test AudioBufferSourceNode With Looping And Duration

    </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 audit = Audit.createTaskRunner();

      audit.define('loop with duration', (task, should) => {

        // Create the context

        let context = new OfflineAudioContext(1, 4096, 48000);

        // Create the sample buffer and fill the second half with 1

        let buffer = context.createBuffer(1, 2048, context.sampleRate);

        for (let i = 1024; i < 2048; i++) {

          buffer.getChannelData(0)[i] = 1;

        // Create the source and set its value

        let source = context.createBufferSource();

        source.loop = true;

        source.loopStart = 1024 / context.sampleRate;

        source.loopEnd = 2048 / context.sampleRate;

        source.buffer = buffer;

        source.connect(context.destination);

        source.start(0, 1024 / context.sampleRate, 2048 / context.sampleRate);

        // Expectations

        let expected = new Float32Array(4096);

        for (let i = 0; i < 2048; i++) {

          expected[i] = 1;

        // Render it!

        context.startRendering()

            .then(function(audioBuffer) {

              should(

                  audioBuffer.getChannelData(0), 'audioBuffer.getChannelData')

                  .beEqualToArray(expected);

})

            .then(task.done.bind(task));

});

      audit.run();

    </script>

  </body>

</html>