test_delayNodeAtMax.html

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<head>

  <title>Test DelayNode with maxDelayTime delay - bug 890528</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<pre id="test">

<script src="webaudio.js" type="text/javascript"></script>

<script class="testbody" type="text/javascript">

const signalLength = 2048;

const delayLength = 1000; // Not on a block boundary

const outputLength = 4096 // > signalLength + 2 * delayLength;

function applySignal(buffer, offset) {

  for (var i = 0; i < signalLength; ++i) {

    buffer.getChannelData(0)[offset + i] = Math.cos(Math.PI * i / signalLength);

var gTest = {

  numberOfChannels: 1,

  createGraph(context) {

    var buffer = context.createBuffer(1, signalLength, context.sampleRate);

    applySignal(buffer, 0);

    var source = context.createBufferSource();

    source.buffer = buffer;

    const delayTime = delayLength / context.sampleRate;

    var delay = context.createDelay(delayTime);

    delay.delayTime.value = delayTime;

    source.connect(delay);

    source.start(0);

    return delay;

},

  createExpectedBuffers(context) {

    var expectedBuffer = context.createBuffer(1, outputLength, context.sampleRate);

    applySignal(expectedBuffer, delayLength);

    return expectedBuffer;

},

};

runTest();

</script>

</pre>

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