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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
| commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
| tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /dom/media/webaudio/test/test_dynamicsCompressorNodeWithGain.html | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip | |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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 0000000000..7e6487e3f8 --- /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 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> |