1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/test/test_delayNodeWithGain.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,54 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<head>
1.7 + <title>Test DelayNode with a GainNode</title>
1.8 + <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
1.9 + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
1.10 +</head>
1.11 +<body>
1.12 +<pre id="test">
1.13 +<script src="webaudio.js" type="text/javascript"></script>
1.14 +<script class="testbody" type="text/javascript">
1.15 +
1.16 +var gTest = {
1.17 + length: 4096,
1.18 + numberOfChannels: 1,
1.19 + createGraph: function(context) {
1.20 + var buffer = context.createBuffer(1, 2048, context.sampleRate);
1.21 + for (var i = 0; i < 2048; ++i) {
1.22 + buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
1.23 + }
1.24 +
1.25 + var source = context.createBufferSource();
1.26 +
1.27 + var delay = context.createDelay();
1.28 +
1.29 + source.buffer = buffer;
1.30 +
1.31 + var gain = context.createGain();
1.32 + gain.gain.value = 0.5;
1.33 +
1.34 + source.connect(gain);
1.35 + gain.connect(delay);
1.36 +
1.37 + // Delay the source stream by 2048 frames
1.38 + delay.delayTime.value = 2048 / context.sampleRate;
1.39 +
1.40 + source.start(0);
1.41 + return delay;
1.42 + },
1.43 + createExpectedBuffers: function(context) {
1.44 + var expectedBuffer = context.createBuffer(1, 2048 * 2, context.sampleRate);
1.45 + for (var i = 2048; i < 2048 * 2; ++i) {
1.46 + expectedBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * (i - 2048) / context.sampleRate) / 2;
1.47 + }
1.48 + return expectedBuffer;
1.49 + },
1.50 +};
1.51 +
1.52 +runTest();
1.53 +
1.54 +</script>
1.55 +</pre>
1.56 +</body>
1.57 +</html>
