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<!DOCTYPE html>
<html>
<head>
<title>
Test AudioParam.setTargetAtTime
</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 audit = Audit.createTaskRunner();
// Play a long DC signal out through an AudioGainNode, and call
// setValueAtTime() and setTargetAtTime at regular intervals to set the
// starting value and the target value. Each time interval has a ramp with
// a different starting and target value so that there is a discontinuity
// at each time interval boundary. The discontinuity is for testing
// timing. Also, we alternate between an increasing and decreasing ramp
// for each interval.
// Number of tests to run.
let numberOfTests = 100;
// Max allowed difference between the rendered data and the expected
// result.
let maxAllowedError = 6.5683e-4
// The AudioGainNode starts with this value instead of the default value.
let initialValue = 100;
// Set the gain node value to the specified value at the specified time.
function setValue(value, time) {
gainNode.gain.setValueAtTime(value, time);
}
// Generate an exponential approach starting at |startTime| with a target
// value of |value|.
function automation(value, startTime, endTime){
// endTime is not used for setTargetAtTime.
gainNode.gain.setTargetAtTime(value, startTime, timeConstant)}
audit.define(
{
label: 'test',
description: 'AudioParam setTargetAtTime() functionality.'
},
function(task, should) {
createAudioGraphAndTest(
task, should, numberOfTests, initialValue, setValue, automation,
'setTargetAtTime()', maxAllowedError,
createExponentialApproachArray);
});
audit.run();
</script>
</body>
</html>
|
