1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
<!DOCTYPE html>
<html>
<head>
<title>
Test AudioParam.exponentialRampToValueAtTime
</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 exponentialRampToValueAtTime() at regular
// intervals to set the starting and ending values for an exponential
// ramp. Each time interval has a ramp with a different starting and
// ending 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 = 1.222e-5;
// 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 ramp ending at time |endTime| with an ending
// value of |value|.
function generateRamp(value, startTime, endTime){
// |startTime| is ignored because the exponential ramp
// uses the value from the setValueAtTime() call above.
gainNode.gain.exponentialRampToValueAtTime(value, endTime)}
audit.define(
{
label: 'test',
description:
'AudioParam exponentialRampToValueAtTime() functionality'
},
function(task, should) {
createAudioGraphAndTest(
task, should, numberOfTests, initialValue, setValue,
generateRamp, 'exponentialRampToValueAtTime()', maxAllowedError,
createExponentialRampArray);
});
audit.run();
</script>
</body>
</html>
|
