<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<script src="resources/audio-testing.js"></script>
<script src="resources/audioparam-testing.js"></script>
<script src="../resources/js-test-pre.js"></script>
</head>

<body>
<div id="description"></div>
<div id="console"></div>

<script>
description("Test AudioParam setValueCurveAtTime() functionality.");

// Play a long DC signal out through an AudioGainNode and for each time interval call
// setValueCurveAtTime() to set the values for the duration of the interval.  Each curve is a sine
// wave, and we assume that the time interval is not an exact multiple of the period. This causes a
// discontinuity between time intervals which is used to test timing.

// Number of tests to run.
var numberOfTests = 20;

// Max allowed difference between the rendered data and the expected result.  (The error is zero
// because the rendered curve should really be exactly the same as the reference.)
var maxAllowedError = 0;

// The amplitude of the sine wave.
var sineAmplitude = 1;

// Frequency of the sine wave.
var freqHz = 440;

// Curve to use for setValueCurveAtTime().
var curve;

// Sets the curve data for the entire time interval.
function automation(value, startTime, endTime)
{
    gainNode.gain.setValueCurveAtTime(curve, startTime, endTime - startTime);
}

// Create a sine wave of the specified duration.
function createReferenceSineArray(startTime, endTime, startValue, endValue, sampleRate)
{
    // Ignore |startValue| and |endValue| for the sine wave.
    return createSineWaveArray(endTime - startTime, freqHz, sineAmplitude, sampleRate);
}

function runTest() 
{
    // The curve of values to use.
    curve = createSineWaveArray(timeInterval, freqHz, sineAmplitude, sampleRate);

    createAudioGraphAndTest(numberOfTests,
                            sineAmplitude,
                            function(k) {
                                // Don't need to set the value.
                            },
                            automation,
                            "setValueCurveAtTime()",
                            maxAllowedError,
                            createReferenceSineArray,
                            2 * Math.PI * sineAmplitude * freqHz / sampleRate);
}

runTest();
successfullyParsed = true;

</script>

<script src="../resources/js-test-post.js"></script>
</body>
</html>