1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/test/test_dynamicsCompressorNode.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,62 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<head>
1.7 + <title>Test DynamicsCompressorNode</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 class="testbody" type="text/javascript">
1.14 +
1.15 +function near(a, b, msg) {
1.16 + ok(Math.abs(a - b) < 1e-4, msg);
1.17 +}
1.18 +
1.19 +SimpleTest.waitForExplicitFinish();
1.20 +addLoadEvent(function() {
1.21 + var context = new AudioContext();
1.22 + var buffer = context.createBuffer(1, 2048, context.sampleRate);
1.23 + for (var i = 0; i < 2048; ++i) {
1.24 + buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
1.25 + }
1.26 +
1.27 + var destination = context.destination;
1.28 +
1.29 + var source = context.createBufferSource();
1.30 +
1.31 + var compressor = context.createDynamicsCompressor();
1.32 +
1.33 + source.buffer = buffer;
1.34 +
1.35 + source.connect(compressor);
1.36 + compressor.connect(destination);
1.37 +
1.38 + is(compressor.channelCount, 2, "compressor node has 2 input channels by default");
1.39 + is(compressor.channelCountMode, "explicit", "Correct channelCountMode for the compressor node");
1.40 + is(compressor.channelInterpretation, "speakers", "Correct channelCountInterpretation for the compressor node");
1.41 +
1.42 + // Verify default values
1.43 + with (compressor) {
1.44 + near(threshold.defaultValue, -24, "Correct default value for threshold");
1.45 + near(knee.defaultValue, 30, "Correct default value for knee");
1.46 + near(ratio.defaultValue, 12, "Correct default value for ratio");
1.47 + near(reduction.defaultValue, 0, "Correct default value for reduction");
1.48 + near(attack.defaultValue, 0.003, "Correct default value for attack");
1.49 + near(release.defaultValue, 0.25, "Correct default value for release");
1.50 + }
1.51 +
1.52 + source.start(0);
1.53 + SimpleTest.executeSoon(function() {
1.54 + source.stop(0);
1.55 + source.disconnect();
1.56 + compressor.disconnect();
1.57 +
1.58 + SimpleTest.finish();
1.59 + });
1.60 +});
1.61 +
1.62 +</script>
1.63 +</pre>
1.64 +</body>
1.65 +</html>
