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<!DOCTYPE html>
<html>
<head>
<title>
Test AudioBuffer.getChannelData() Returns the Same Object
</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/webaudio/resources/audit-util.js"></script>
<script src="/webaudio/resources/audit.js"></script>
<script src="/webaudio/resources/audioparam-testing.js"></script>
</head>
<body>
<script id="layout-test-code">
let sampleRate = 48000;
let renderDuration = 0.5;
let audit = Audit.createTaskRunner();
audit.define('buffer-eq', (task, should) => {
// Verify that successive calls to getChannelData return the same
// buffer.
let context = new AudioContext();
let channelCount = 2;
let frameLength = 1000;
let buffer =
context.createBuffer(channelCount, frameLength, context.sampleRate);
for (let c = 0; c < channelCount; ++c) {
let a = buffer.getChannelData(c);
let b = buffer.getChannelData(c);
let message = 'buffer.getChannelData(' + c + ')';
should(a === b, message + ' === ' + message).beEqualTo(true);
}
task.done();
});
audit.define('buffer-not-eq', (task, should) => {
let context = new AudioContext();
let channelCount = 2;
let frameLength = 1000;
let buffer1 =
context.createBuffer(channelCount, frameLength, context.sampleRate);
let buffer2 =
context.createBuffer(channelCount, frameLength, context.sampleRate);
let success = true;
for (let c = 0; c < channelCount; ++c) {
let a = buffer1.getChannelData(c);
let b = buffer2.getChannelData(c);
let message = 'getChannelData(' + c + ')';
should(a === b, 'buffer1.' + message + ' === buffer2.' + message)
.beEqualTo(false) &&
success;
}
task.done();
});
audit.run();
</script>
</body>
</html>
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