1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/test/test_audioParamSetCurveAtTime.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,55 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<head>
1.7 + <title>Test AudioParam.linearRampToValue</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 T0 = 0;
1.17 +
1.18 +var gTest = {
1.19 + length: 2048,
1.20 + numberOfChannels: 1,
1.21 + createGraph: function(context) {
1.22 + var sourceBuffer = context.createBuffer(1, 2048, context.sampleRate);
1.23 + for (var i = 0; i < 2048; ++i) {
1.24 + sourceBuffer.getChannelData(0)[i] = 1;
1.25 + }
1.26 +
1.27 + var source = context.createBufferSource();
1.28 + source.buffer = sourceBuffer;
1.29 +
1.30 + var gain = context.createGain();
1.31 + gain.gain.setValueCurveAtTime(this.curve, T0, this.duration);
1.32 +
1.33 + source.connect(gain);
1.34 +
1.35 + source.start(0);
1.36 + return gain;
1.37 + },
1.38 + createExpectedBuffers: function(context) {
1.39 + this.duration = 1024 / context.sampleRate;
1.40 + this.curve = new Float32Array(100);
1.41 + for (var i = 0; i < 100; ++i) {
1.42 + this.curve[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
1.43 + }
1.44 + var expectedBuffer = context.createBuffer(1, 2048, context.sampleRate);
1.45 + for (var i = 0; i < 2048; ++i) {
1.46 + var t = i / context.sampleRate;
1.47 + expectedBuffer.getChannelData(0)[i] = this.curve[Math.min(99, Math.floor(100 * Math.min(1.0, (t - T0) / this.duration)))];
1.48 + }
1.49 + return expectedBuffer;
1.50 + },
1.51 +};
1.52 +
1.53 +runTest();
1.54 +
1.55 +</script>
1.56 +</pre>
1.57 +</body>
1.58 +</html>
