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106 lines
3.4 KiB
HTML
106 lines
3.4 KiB
HTML
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<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test whether we can create an AudioContext interface</title>
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<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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</head>
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<body>
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<pre id="test">
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<script src="webaudio.js" type="text/javascript"></script>
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<script class="testbody" type="text/javascript">
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SimpleTest.waitForExplicitFinish();
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addLoadEvent(function() {
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var context = new AudioContext();
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var buffer = context.createBuffer(2, 2048, context.sampleRate);
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SpecialPowers.gc(); // Make sure that our channels are accessible after GC
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ok(buffer, "Buffer was allocated successfully");
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is(buffer.sampleRate, context.sampleRate, "Correct sample rate");
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is(buffer.length, 2048, "Correct length");
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ok(Math.abs(buffer.duration - 2048 / context.sampleRate) < 0.0001, "Correct duration");
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is(buffer.numberOfChannels, 2, "Correct number of channels");
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for (var i = 0; i < buffer.numberOfChannels; ++i) {
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var buf = buffer.getChannelData(i);
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ok(buf, "Buffer index " + i + " exists");
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ok(buf instanceof Float32Array, "Result is a typed array");
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is(buf.length, buffer.length, "Correct length");
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var foundNonZero = false;
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for (var j = 0; j < buf.length; ++j) {
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if (buf[j] != 0) {
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foundNonZero = true;
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break;
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}
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buf[j] = j;
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}
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ok(!foundNonZero, "Buffer " + i + " should be initialized to 0");
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}
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// Now test copying the channel data out of a normal buffer
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var copy = new Float32Array(100);
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buffer.copyFromChannel(copy, 0, 1024);
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for (var i = 0; i < copy.length; ++i) {
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is(copy[i], 1024 + i, "Correct sample");
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}
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// Test copying the channel data out of a playing buffer
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var srcNode = context.createBufferSource();
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srcNode.buffer = buffer;
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srcNode.start(0);
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copy = new Float32Array(100);
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buffer.copyFromChannel(copy, 0, 1024);
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for (var i = 0; i < copy.length; ++i) {
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is(copy[i], 1024 + i, "Correct sample");
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}
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// Test copying to the channel data
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var newData = new Float32Array(200);
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buffer.copyToChannel(newData, 0, 100);
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var changedData = buffer.getChannelData(0);
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for (var i = 0; i < changedData.length; ++i) {
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if (i < 100 || i >= 300) {
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is(changedData[i], i, "Untouched sample");
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} else {
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is(changedData[i], 0, "Correct sample");
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}
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}
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// Now, neuter the array buffer
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var worker = new Worker("audioBufferSourceNodeNeutered_worker.js");
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var data = buffer.getChannelData(0).buffer;
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worker.postMessage(data, [data]);
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SpecialPowers.gc();
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expectException(function() {
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buffer.copyFromChannel(copy, 0, 1024);
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}, DOMException.INDEX_SIZE_ERR);
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expectException(function() {
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buffer.copyToChannel(newData, 0, 100);
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}, DOMException.INDEX_SIZE_ERR);
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expectException(function() {
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context.createBuffer(2, 2048, 7999);
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}, DOMException.INDEX_SIZE_ERR);
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expectException(function() {
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context.createBuffer(2, 2048, 192001);
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}, DOMException.INDEX_SIZE_ERR);
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context.createBuffer(2, 2048, 8000); // no exception
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context.createBuffer(2, 2048, 192000); // no exception
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context.createBuffer(32, 2048, 48000); // no exception
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// Null length
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expectException(function() {
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context.createBuffer(2, 0, 48000);
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}, DOMException.INDEX_SIZE_ERR);
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// Null number of channels
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expectException(function() {
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context.createBuffer(0, 2048, 48000);
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}, DOMException.INDEX_SIZE_ERR);
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SimpleTest.finish();
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});
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</script>
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</pre>
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</body>
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</html>
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