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| author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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| committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
| commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
| tree | 10027f336435511475e392454359edea8e25895d /dom/media/webaudio/test/test_dynamicsCompressorNodeWithGain.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_dynamicsCompressorNodeWithGain.html')
| -rw-r--r-- | dom/media/webaudio/test/test_dynamicsCompressorNodeWithGain.html | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/dom/media/webaudio/test/test_dynamicsCompressorNodeWithGain.html b/dom/media/webaudio/test/test_dynamicsCompressorNodeWithGain.html new file mode 100644 index 000000000..2e4b38ea5 --- /dev/null +++ b/dom/media/webaudio/test/test_dynamicsCompressorNodeWithGain.html @@ -0,0 +1,51 @@ +<!DOCTYPE HTML> +<html> +<head> +<meta charset="utf-8"> + <title>Test DynamicsCompressor with Gain</title> + <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> +</head> +<body> +<script class="testbody" type="text/javascript"> +SimpleTest.waitForExplicitFinish(); + +addLoadEvent(function() { + var samplerate = 44100; + var context = new OfflineAudioContext(1, samplerate/100, samplerate); + + var osc = context.createOscillator(); + osc.frequency.value = 2400; + + var gain = context.createGain(); + gain.gain.value = 1.5; + + // These numbers are borrowed from the example code on MDN + // https://developer.mozilla.org/en-US/docs/Web/API/DynamicsCompressorNode + var compressor = context.createDynamicsCompressor(); + compressor.threshold.value = -50; + compressor.knee.value = 40; + compressor.ratio.value = 12; + compressor.reduction.value = -20; + compressor.attack.value = 0; + compressor.release.value = 0.25; + + osc.connect(gain); + gain.connect(compressor); + compressor.connect(context.destination); + osc.start(); + + context.startRendering().then(buffer => { + var peak = Math.max(...buffer.getChannelData(0)); + console.log(peak); + // These values are experimentally determined. Without dynamics compression + // the peak should be just under 1.5. We also check for a minimum value + // to make sure we are not getting all zeros. + ok(peak >= 0.2 && peak < 1.0, "Peak value should be greater than 0.25 and less than 1.0"); + SimpleTest.finish(); + }); +}); +</script> +<pre> +</pre> +</body> |