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+<!DOCTYPE HTML>
+<html>
+<head>
+ <title>Test WaveShaperNode with no curve</title>
+ <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <script type="text/javascript" src="webaudio.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+var gTest = {
+ length: 4096,
+ numberOfChannels: 1,
+ createGraph: function(context) {
+ var source = context.createBufferSource();
+ source.buffer = this.buffer;
+
+ var shaper = context.createWaveShaper();
+ shaper.curve = this.curve;
+
+ source.connect(shaper);
+
+ source.start(0);
+ return shaper;
+ },
+ createExpectedBuffers: function(context) {
+ this.buffer = context.createBuffer(1, 4096, context.sampleRate);
+ for (var i = 1; i < 4095; ++i) {
+ this.buffer.getChannelData(0)[i] = 2 * (i / 4096) - 1;
+ }
+ // Two out of range values
+ this.buffer.getChannelData(0)[0] = -2;
+ this.buffer.getChannelData(0)[4095] = 2;
+
+ this.curve = new Float32Array(2048);
+ for (var i = 0; i < 2048; ++i) {
+ this.curve[i] = Math.sin(100 * Math.PI * (i + 1) / context.sampleRate);
+ }
+
+ var expectedBuffer = context.createBuffer(1, 4096, context.sampleRate);
+ for (var i = 1; i < 4095; ++i) {
+ var input = this.buffer.getChannelData(0)[i];
+ var index = Math.floor(this.curve.length * (input + 1) / 2);
+ index = Math.max(0, Math.min(this.curve.length - 1, index));
+ expectedBuffer.getChannelData(0)[i] = this.curve[index];
+ }
+ expectedBuffer.getChannelData(0)[0] = this.curve[0];
+ expectedBuffer.getChannelData(0)[4095] = this.curve[2047];
+ return expectedBuffer;
+ },
+};
+
+runTest();
+
+</script>
+</pre>
+</body>
+</html>