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+<!DOCTYPE HTML>
+<html>
+<meta charset="utf-8">
+<head>
+ <title>Test MediaElementAudioSourceNode</title>
+ <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<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 expectedMinNonzeroSampleCount;
+ var expectedMaxNonzeroSampleCount;
+ var nonzeroSampleCount = 0;
+ var complete = false;
+ var iterationCount = 0;
+
+ // 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;
+ is(e.inputBuffer.numberOfChannels, 1,
+ "Checking data channel count (nonzeroSamplesThisBuffer=" +
+ nonzeroSamplesThisBuffer + ")");
+ ok(nonzeroSampleCount <= expectedMaxNonzeroSampleCount,
+ "Too many nonzero samples (got " + nonzeroSampleCount + ", expected max " + expectedMaxNonzeroSampleCount + ")");
+ if (nonzeroSampleCount >= expectedMinNonzeroSampleCount &&
+ nonzeroSamplesThisBuffer == 0) {
+ ok(true,
+ "Check received enough nonzero samples (got " + nonzeroSampleCount + ", expected min " + expectedMinNonzeroSampleCount + ")");
+ SimpleTest.finish();
+ complete = true;
+ }
+ }
+
+ audio.onloadedmetadata = function() {
+ var node = context.createMediaElementSource(audio);
+ var sp = context.createScriptProcessor(2048, 1);
+ node.connect(sp);
+ // Use a fuzz factor of 100 to account for samples that just happen to be zero
+ expectedMinNonzeroSampleCount = Math.floor(audio.duration*context.sampleRate) - 100;
+ expectedMaxNonzeroSampleCount = Math.floor(audio.duration*context.sampleRate) + 500;
+ sp.onaudioprocess = processSamples;
+ };
+}
+
+SpecialPowers.pushPrefEnv({"set": [["media.preload.default", 2], ["media.preload.auto", 3]]}, test);
+
+</script>
+</pre>
+</body>
+</html>