1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/test/test_gainNode.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,57 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<head>
1.7 + <title>Test GainNode</title>
1.8 + <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
1.9 + <script type="text/javascript" src="webaudio.js"></script>
1.10 + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
1.11 +</head>
1.12 +<body>
1.13 +<pre id="test">
1.14 +<script class="testbody" type="text/javascript">
1.15 +
1.16 +var gTest = {
1.17 + length: 2048,
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 gain = context.createGain();
1.28 +
1.29 + source.buffer = buffer;
1.30 +
1.31 + source.connect(gain);
1.32 +
1.33 + ok(gain.gain, "The audioparam member must exist");
1.34 + is(gain.gain.value, 1.0, "Correct initial value");
1.35 + is(gain.gain.defaultValue, 1.0, "Correct default value");
1.36 + gain.gain.value = 0.5;
1.37 + is(gain.gain.value, 0.5, "Correct initial value");
1.38 + is(gain.gain.defaultValue, 1.0, "Correct default value");
1.39 + is(gain.channelCount, 2, "gain node has 2 input channels by default");
1.40 + is(gain.channelCountMode, "max", "Correct channelCountMode for the gain node");
1.41 + is(gain.channelInterpretation, "speakers", "Correct channelCountInterpretation for the gain node");
1.42 +
1.43 + source.start(0);
1.44 + return gain;
1.45 + },
1.46 + createExpectedBuffers: function(context) {
1.47 + var expectedBuffer = context.createBuffer(1, 2048, context.sampleRate);
1.48 + for (var i = 0; i < 2048; ++i) {
1.49 + expectedBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate) / 2;
1.50 + }
1.51 + return expectedBuffer;
1.52 + },
1.53 +};
1.54 +
1.55 +runTest();
1.56 +
1.57 +</script>
1.58 +</pre>
1.59 +</body>
1.60 +</html>
