Quelle test_delayNode.html Sprache: HTML

products/sources/formale Sprachen/C/Firefox/dom/media/webaudio/test/test_delayNode.html

<!DOCTYPE HTML>
<html>
<head>
  <title>Test DelayNode</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">

var gTest = {
  length: 4096,
  numberOfChannels: 1,
  createGraph(context) {
    var delay = new DelayNode(context);
    ok(delay.delayTime, "The audioparam member must exist");
    is(delay.delayTime.value, 0, "Correct initial value");
    is(delay.delayTime.defaultValue, 0, "Correct default value");
    delay.delayTime.value = 0.5;
    is(delay.delayTime.value, 0.5, "Correct initial value");
    is(delay.delayTime.defaultValue, 0, "Correct default value");

    delay = new DelayNode(context, { delayTime: 0.5 });
    ok(delay.delayTime, "The audioparam member must exist");
    is(delay.delayTime.value, 0.5, "Correct initial value");
    is(delay.delayTime.defaultValue, 0, "Correct default value");

    var buffer = context.createBuffer(1, 2048, context.sampleRate);
    for (var i = 0; i < 2048; ++i) {
      buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
    }

    var source = context.createBufferSource();

    delay = context.createDelay();

    source.buffer = buffer;

    source.connect(delay);

    ok(delay.delayTime, "The audioparam member must exist");
    is(delay.delayTime.value, 0, "Correct initial value");
    is(delay.delayTime.defaultValue, 0, "Correct default value");
    delay.delayTime.value = 0.5;
    is(delay.delayTime.value, 0.5, "Correct initial value");
    is(delay.delayTime.defaultValue, 0, "Correct default value");
    is(delay.channelCount, 2, "delay node has 2 input channels by default");
    is(delay.channelCountMode, "max", "Correct channelCountMode for the delay node");
    is(delay.channelInterpretation, "speakers", "Correct channelCountInterpretation for the delay node");

    expectException(function() {
      context.createDelay(0);
    }, DOMException.NOT_SUPPORTED_ERR);
    expectException(function() {
      context.createDelay(180);
    }, DOMException.NOT_SUPPORTED_ERR);
    expectTypeError(function() {
      context.createDelay(NaN);
    }, DOMException.NOT_SUPPORTED_ERR);
    expectException(function() {
      context.createDelay(-1);
    }, DOMException.NOT_SUPPORTED_ERR);

    expectException(function() {
      new DelayNode(context, { maxDelayTime: 0 });
    }, DOMException.NOT_SUPPORTED_ERR);
    expectException(function() {
      new DelayNode(context, { maxDelayTime: 180 });
    }, DOMException.NOT_SUPPORTED_ERR);
    expectTypeError(function() {
      new DelayNode(context, { maxDelayTime: NaN });
    }, DOMException.NOT_SUPPORTED_ERR);
    expectException(function() {
      new DelayNode(context, { maxDelayTime: -1 });
    }, DOMException.NOT_SUPPORTED_ERR);

    context.createDelay(1); // should not throw

    // Delay the source stream by 2048 frames
    delay.delayTime.value = 2048 / context.sampleRate;

    source.start(0);
    return delay;
  },
  createExpectedBuffers(context) {
    var expectedBuffer = context.createBuffer(1, 2048 * 2, context.sampleRate);
    for (var i = 2048; i < 2048 * 2; ++i) {
      expectedBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * (i - 2048) / context.sampleRate);
    }
    return expectedBuffer;
  },
};

runTest();

</script>
</pre>
</body>
</html>

Messung V0.5

¤ Dauer der Verarbeitung: 0.1 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.