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<meta charset="utf-8">
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<title>Test MediaElementAudioSourceNode with passthrough</title>
<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<pre id="test">
<script class="testbody" type="text/javascript">
SimpleTest.waitForExplicitFinish();
function test() {
var audio = new Audio("small-shot.ogg");
var context = new AudioContext();
var node = context.createMediaElementSource(audio);
var sp = context.createScriptProcessor(2048, 1);
node.connect(sp);
var nonzeroSampleCount = 0;
var complete = false;
var iterationCount = 0;
var srcWrapped = SpecialPowers.wrap(node);
ok("passThrough" in srcWrapped, "MediaElementAudioSourceNode should support the passThrough API");
srcWrapped.passThrough = true;
// This test ensures we receive at least expectedSampleCount nonzero samples
function processSamples(e) {
if (complete) {
return;
}
if (iterationCount == 0) {
// Don't start playing the audio until the AudioContext stuff is connected
// and running.
audio.play();
}
++iterationCount;
var buf = e.inputBuffer.getChannelData(0);
var nonzeroSamplesThisBuffer = 0;
for (var i = 0; i < buf.length; ++i) {
if (buf[i] != 0) {
++nonzeroSamplesThisBuffer;
}
}
nonzeroSampleCount += nonzeroSamplesThisBuffer;
if (iterationCount == 10) {
is(nonzeroSampleCount, 0, "The input must be silence");
SimpleTest.finish();
complete = true;
}
}
audio.oncanplaythrough = function() {
sp.onaudioprocess = processSamples;
};
}
SpecialPowers.pushPrefEnv({"set": [["media.preload.default", 2], ["media.preload.auto", 3]]}, test);
</script>
</pre>
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