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| author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
|---|---|---|
| committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
| commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
| tree | 10027f336435511475e392454359edea8e25895d /dom/media/webaudio/test/test_periodicWaveDisableNormalization.html | |
| parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
| download | UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip | |
Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/media/webaudio/test/test_periodicWaveDisableNormalization.html')
| -rw-r--r-- | dom/media/webaudio/test/test_periodicWaveDisableNormalization.html | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/dom/media/webaudio/test/test_periodicWaveDisableNormalization.html b/dom/media/webaudio/test/test_periodicWaveDisableNormalization.html new file mode 100644 index 000000000..fb924c475 --- /dev/null +++ b/dom/media/webaudio/test/test_periodicWaveDisableNormalization.html @@ -0,0 +1,100 @@ +<!DOCTYPE HTML> +<html> +<head> + <title>Test PeriodicWave disableNormalization Parameter</title> + <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> + <script type="text/javascript" src="webaudio.js"></script> + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> +</head> +<body> +<pre id="test"> +<script class="testbody" type="text/javascript"> + +SimpleTest.waitForExplicitFinish(); + +// We create PerodicWave instances containing two tones and compare it to +// buffers created directly in JavaScript by adding the two waves together. +// Two of the PeriodicWaves are normalized, the other is not. This test is +// a modification of test_periodicWave.html. +// +// These constants are borrowed from test_periodicWave.html and modified +// so that the realPeak (which is the normalization factor) will be small +// enough that the errors are within the bounds for the test. +const realMax = 99; +var real = new Float32Array(realMax + 1); +real[1] = 2.0; // fundamental +real[realMax] = 0.25; + +const realPeak = real[1] + real[realMax]; +const realFundamental = 19.0; + +const testLength = 4096; + +addLoadEvent(function() { + runTest(); +}); + +var gTest = { + createGraph: function(context) { + var merger = context.createChannelMerger(); + + var osc0 = context.createOscillator(); + var osc1 = context.createOscillator(); + var osc2 = context.createOscillator(); + + osc0.setPeriodicWave(context. + createPeriodicWave(real, + new Float32Array(real.length), + {disableNormalization: false})); + osc1.setPeriodicWave(context. + createPeriodicWave(real, + new Float32Array(real.length))); + osc2.setPeriodicWave(context. + createPeriodicWave(real, + new Float32Array(real.length), + {disableNormalization: true})); + + osc0.frequency.value = realFundamental; + osc1.frequency.value = realFundamental; + osc2.frequency.value = realFundamental; + + osc0.start(); + osc1.start(); + osc2.start(); + + osc0.connect(merger, 0, 0); + osc1.connect(merger, 0, 1); + osc2.connect(merger, 0, 2); + + return merger; + }, + createExpectedBuffers: function(context) { + var buffer = context.createBuffer(3, testLength, context.sampleRate); + + for (var i = 0; i < buffer.length; ++i) { + + buffer.getChannelData(0)[i] = 1.0 / realPeak * + (real[1] * Math.cos(2 * Math.PI * realFundamental * i / + context.sampleRate) + + real[realMax] * Math.cos(2 * Math.PI * realMax * realFundamental * i / + context.sampleRate)); + + buffer.getChannelData(1)[i] = buffer.getChannelData(0)[i]; + + // TODO: We need to scale by a factor of two to make the results work + // out here. This seems suspicious, see Bug 1266737. + buffer.getChannelData(2)[i] = 2.0 * + (real[1] * Math.cos(2 * Math.PI * realFundamental * i / + context.sampleRate) + + real[realMax] * Math.cos(2 * Math.PI * realMax * realFundamental * i / + context.sampleRate)); + } + return buffer; + }, + 'numberOfChannels': 3, +}; + +</script> +</pre> +</body> +</html> |