1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/test/test_waveDecoder.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,69 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<meta charset=utf-8>
1.7 +<head>
1.8 + <title>Test that we decode uint8 and sint16 wave files with correct conversion to float64</title>
1.9 + <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.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 +var testsDone = 0;
1.16 +var tests = ["UklGRjUrAABXQVZFZm10IBAAAAABAAEAESsAABErAAABAAgAZGF0YQMAAAD/AIA=",
1.17 + "UklGRkZWAABXQVZFZm10IBAAAAABAAEAESsAACJWAAACABAAZGF0YQYAAAD/fwCAAAA="];
1.18 +
1.19 +SimpleTest.waitForExplicitFinish();
1.20 +
1.21 +function base64ToUint8Buffer(b64) {
1.22 + var str = atob(b64)
1.23 + var u8 = new Uint8Array(str.length);
1.24 + for (var i = 0; i < str.length; ++i) {
1.25 + u8[i] = str.charCodeAt(i);
1.26 + }
1.27 + return u8;
1.28 +}
1.29 +
1.30 +function fixupBufferSampleRate(u8, rate) {
1.31 + u8[24] = (rate & 0x000000ff) >> 0;
1.32 + u8[25] = (rate & 0x0000ff00) >> 8;
1.33 + u8[26] = (rate & 0x00ff0000) >> 16;
1.34 + u8[27] = (rate & 0xff000000) >> 24;
1.35 +}
1.36 +
1.37 +function finishTest() {
1.38 + testsDone += 1;
1.39 + if (testsDone == tests.length) {
1.40 + SimpleTest.finish();
1.41 + }
1.42 +}
1.43 +
1.44 +function decodeComplete(b) {
1.45 + ok(true, "Decoding succeeded.");
1.46 + is(b.numberOfChannels, 1, "Should have 1 channel.");
1.47 + is(b.length, 3, "Should have three samples.");
1.48 + var samples = b.getChannelData(0);
1.49 + ok(samples[0] > 0.99 && samples[0] < 1.01, "Check near 1.0. Got " + samples[0]);
1.50 + ok(samples[1] > -1.01 && samples[1] < -0.99, "Check near -1.0. Got " + samples[1]);
1.51 + ok(samples[2] > -0.01 && samples[2] < 0.01, "Check near 0.0. Got " + samples[2]);
1.52 + finishTest();
1.53 +}
1.54 +
1.55 +function decodeFailed() {
1.56 + ok(false, "Decoding failed.");
1.57 + finishTest();
1.58 +}
1.59 +
1.60 +addLoadEvent(function() {
1.61 + var context = new AudioContext();
1.62 +
1.63 + for (var i = 0; i < tests.length; ++i) {
1.64 + var u8 = base64ToUint8Buffer(tests[i]);
1.65 + fixupBufferSampleRate(u8, context.sampleRate);
1.66 + context.decodeAudioData(u8.buffer, decodeComplete, decodeFailed);
1.67 + }
1.68 +});
1.69 +</script>
1.70 +</pre>
1.71 +</body>
1.72 +</html>
