1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/test/test_scriptProcessorNode.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,145 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<head>
1.7 + <title>Test ScriptProcessorNode</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 +// We do not use our generic graph test framework here because
1.17 +// the testing logic here is sort of complicated, and would
1.18 +// not be easy to map to OfflineAudioContext, as ScriptProcessorNodes
1.19 +// can experience delays.
1.20 +
1.21 +SimpleTest.waitForExplicitFinish();
1.22 +addLoadEvent(function() {
1.23 + var context = new AudioContext();
1.24 + var buffer = null;
1.25 +
1.26 + var sourceSP = context.createScriptProcessor(2048);
1.27 + sourceSP.addEventListener("audioprocess", function(e) {
1.28 + // generate the audio
1.29 + for (var i = 0; i < 2048; ++i) {
1.30 + // Make sure our first sample won't be zero
1.31 + e.outputBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * (i + 1) / context.sampleRate);
1.32 + e.outputBuffer.getChannelData(0)[i] = Math.sin(880 * 2 * Math.PI * (i + 1) / context.sampleRate);
1.33 + }
1.34 + // Remember our generated audio
1.35 + buffer = e.outputBuffer;
1.36 +
1.37 + sourceSP.removeEventListener("audioprocess", arguments.callee);
1.38 + }, false);
1.39 +
1.40 + expectException(function() {
1.41 + context.createScriptProcessor(1);
1.42 + }, DOMException.INDEX_SIZE_ERR);
1.43 + expectException(function() {
1.44 + context.createScriptProcessor(2);
1.45 + }, DOMException.INDEX_SIZE_ERR);
1.46 + expectException(function() {
1.47 + context.createScriptProcessor(128);
1.48 + }, DOMException.INDEX_SIZE_ERR);
1.49 + expectException(function() {
1.50 + context.createScriptProcessor(255);
1.51 + }, DOMException.INDEX_SIZE_ERR);
1.52 +
1.53 + is(sourceSP.channelCount, 2, "script processor node has 2 input channels by default");
1.54 + is(sourceSP.channelCountMode, "explicit", "Correct channelCountMode for the script processor node");
1.55 + is(sourceSP.channelInterpretation, "speakers", "Correct channelCountInterpretation for the script processor node");
1.56 +
1.57 + function findFirstNonZeroSample(buffer) {
1.58 + for (var i = 0; i < buffer.length; ++i) {
1.59 + if (buffer.getChannelData(0)[i] != 0) {
1.60 + return i;
1.61 + }
1.62 + }
1.63 + return buffer.length;
1.64 + }
1.65 +
1.66 + var sp = context.createScriptProcessor(2048);
1.67 + sourceSP.connect(sp);
1.68 + sp.connect(context.destination);
1.69 + var lastPlaybackTime = 0;
1.70 + sp.onaudioprocess = function(e) {
1.71 + isnot(buffer, null, "The audioprocess handler for sourceSP must be run at this point");
1.72 + is(e.target, sp, "Correct event target");
1.73 + ok(e.playbackTime > lastPlaybackTime, "playbackTime correctly set");
1.74 + lastPlaybackTime = e.playbackTime;
1.75 + is(e.inputBuffer.numberOfChannels, 2, "Correct number of channels for the input buffer");
1.76 + is(e.inputBuffer.length, 2048, "Correct length for the input buffer");
1.77 + is(e.inputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the input buffer");
1.78 + is(e.outputBuffer.numberOfChannels, 2, "Correct number of channels for the output buffer");
1.79 + is(e.outputBuffer.length, 2048, "Correct length for the output buffer");
1.80 + is(e.outputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the output buffer");
1.81 +
1.82 + // Because of the initial latency added by the second script processor node,
1.83 + // we will never see any generated audio frames in the first callback.
1.84 + var emptyBuffer = context.createBuffer(1, 2048, context.sampleRate);
1.85 + compareChannels(e.inputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
1.86 + compareChannels(e.inputBuffer.getChannelData(1), emptyBuffer.getChannelData(0));
1.87 + compareChannels(e.outputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
1.88 + compareChannels(e.outputBuffer.getChannelData(1), emptyBuffer.getChannelData(0));
1.89 +
1.90 + sp.onaudioprocess = function(e) {
1.91 + is(e.target, sp, "Correct event target");
1.92 + ok(e.playbackTime > lastPlaybackTime, "playbackTime correctly set");
1.93 + lastPlaybackTime = e.playbackTime;
1.94 + is(e.inputBuffer.numberOfChannels, 2, "Correct number of channels for the input buffer");
1.95 + is(e.inputBuffer.length, 2048, "Correct length for the input buffer");
1.96 + is(e.inputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the input buffer");
1.97 + is(e.outputBuffer.numberOfChannels, 2, "Correct number of channels for the output buffer");
1.98 + is(e.outputBuffer.length, 2048, "Correct length for the output buffer");
1.99 + is(e.outputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the output buffer");
1.100 +
1.101 + var firstNonZero = findFirstNonZeroSample(e.inputBuffer);
1.102 + ok(firstNonZero <= 2048, "First non-zero sample within range");
1.103 +
1.104 + compareChannels(e.inputBuffer.getChannelData(0), emptyBuffer.getChannelData(0), firstNonZero);
1.105 + compareChannels(e.inputBuffer.getChannelData(1), emptyBuffer.getChannelData(0), firstNonZero);
1.106 + compareChannels(e.inputBuffer.getChannelData(0), buffer.getChannelData(0), 2048 - firstNonZero, firstNonZero, 0);
1.107 + compareChannels(e.inputBuffer.getChannelData(1), buffer.getChannelData(1), 2048 - firstNonZero, firstNonZero, 0);
1.108 + compareChannels(e.outputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
1.109 + compareChannels(e.outputBuffer.getChannelData(1), emptyBuffer.getChannelData(0));
1.110 +
1.111 + if (firstNonZero == 0) {
1.112 + // If we did not experience any delays, the test is done!
1.113 + sp.onaudioprocess = null;
1.114 +
1.115 + SimpleTest.finish();
1.116 + } else if (firstNonZero != 2048) {
1.117 + // In case we just saw a zero buffer this time, wait one more round
1.118 + sp.onaudioprocess = function(e) {
1.119 + is(e.target, sp, "Correct event target");
1.120 + ok(e.playbackTime > lastPlaybackTime, "playbackTime correctly set");
1.121 + lastPlaybackTime = e.playbackTime;
1.122 + is(e.inputBuffer.numberOfChannels, 2, "Correct number of channels for the input buffer");
1.123 + is(e.inputBuffer.length, 2048, "Correct length for the input buffer");
1.124 + is(e.inputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the input buffer");
1.125 + is(e.outputBuffer.numberOfChannels, 2, "Correct number of channels for the output buffer");
1.126 + is(e.outputBuffer.length, 2048, "Correct length for the output buffer");
1.127 + is(e.outputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the output buffer");
1.128 +
1.129 + compareChannels(e.inputBuffer.getChannelData(0), buffer.getChannelData(0), firstNonZero, 0, 2048 - firstNonZero);
1.130 + compareChannels(e.inputBuffer.getChannelData(1), buffer.getChannelData(1), firstNonZero, 0, 2048 - firstNonZero);
1.131 + compareChannels(e.inputBuffer.getChannelData(0), emptyBuffer.getChannelData(0), undefined, firstNonZero);
1.132 + compareChannels(e.inputBuffer.getChannelData(1), emptyBuffer.getChannelData(0), undefined, firstNonZero);
1.133 + compareChannels(e.outputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
1.134 + compareChannels(e.outputBuffer.getChannelData(1), emptyBuffer.getChannelData(0));
1.135 +
1.136 + sp.onaudioprocess = null;
1.137 +
1.138 + SimpleTest.finish();
1.139 + };
1.140 + }
1.141 + };
1.142 + };
1.143 +});
1.144 +
1.145 +</script>
1.146 +</pre>
1.147 +</body>
1.148 +</html>
