blob: ce5b5228e72743918590c6229be226d12bfe53cf [file] [log] [blame]
<!DOCTYPE html>
<html>
<head>
<script src="../resources/js-test.js"></script>
<script type="text/javascript" src="resources/audio-testing.js"></script>
<script src="resources/audio-file-utils.js"></script>
<body>
<script>
description("Test that decoding an WAV isn't incorrectly receiving silence at the end");
window.jsTestIsAsync = true;
var context = new window.AudioContext({ sampleRate: 44100 });
var request = new XMLHttpRequest();
request.open("GET", 'pinknoise.wav', true);
request.responseType = "arraybuffer";
request.onload = function() {
context.decodeAudioData(request.response, (buffer) => {
testPassed("Successfully decoded content");
// File is exactly 4s @ 44100Hz
if (buffer.length === 176400)
testPassed("Decoding returned the right number of frames.");
else {
testFailed("Decoding returned the wrong number of frames: " + buffer.length);
finishJSTest();
return;
}
// convert to 32 bits float WAV.
const wavData = createAudioData(buffer, true /* asFloat */);
context.decodeAudioData(wavData.buffer, (buffer) => {
if (buffer.length === 176400)
testPassed("Decoding returned the right number of frames.");
else {
testFailed("Decoding returned the wrong number of frames: " + buffer.length);
finishJSTest();
return;
}
const decodedData = buffer.getChannelData(0);
let consecutiveSilent = 0
for (const sample of decodedData) {
if (sample == 0 && ++consecutiveSilent > 3) {
testFailed("Found silence content.");
break;
} else if (sample)
consecutiveSilent = 0
}
if (!consecutiveSilent)
testPassed("All frames got decoded with no silence.");
finishJSTest();
}, () => {
testFailed("Failed to decode intermediary file");
finishJSTest();
});
}, () => {
testFailed("Failed to decode file");
finishJSTest();
});
}
request.send();
</script>
</body>
</html>