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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_waveShaperGain.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_waveShaperGain.html')
| -rw-r--r-- | dom/media/webaudio/test/test_waveShaperGain.html | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/dom/media/webaudio/test/test_waveShaperGain.html b/dom/media/webaudio/test/test_waveShaperGain.html new file mode 100644 index 000000000..b0c82d2d8 --- /dev/null +++ b/dom/media/webaudio/test/test_waveShaperGain.html @@ -0,0 +1,73 @@ +<!DOCTYPE HTML> +<html> +<head> +<meta charset="utf-8"> + <title>Test that WaveShaperNode doesn't corrupt its inputs when the gain is != + 1.0 (bug 1203616)</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(); +var samplerate = 44100; +var context = new OfflineAudioContext(1, 44100, samplerate); + +var dc = context.createBufferSource(); + +var buffer = context.createBuffer(1, 1, samplerate); +buffer.getChannelData(0)[0] = 1.0; +dc.buffer = buffer; + +var gain = context.createGain(); +var ws2 = context.createWaveShaper(); +var ws = []; + +// No-op waveshaper curves. +for (var i = 0; i < 2; i++) { + ws[i] = context.createWaveShaper(); + var curve = new Float32Array(2); + curve[0] = -1.0; + curve[1] = 1.0; + ws[i].curve = curve; + ws[i].connect(context.destination); + gain.connect(ws[i]); +} + +dc.connect(gain); +dc.start(); + +gain.gain.value = 0.5; + +context.startRendering().then(buffer => { + document.querySelector("pre").innerHTML = buffer.getChannelData(0)[0]; + ok(buffer.getChannelData(0)[0] == 1.0, "Volume was handled properly"); + + context = new OfflineAudioContext(1, 100, samplerate); + var oscillator = context.createOscillator(); + var gain = context.createGain(); + var waveShaper = context.createWaveShaper(); + + oscillator.start(0); + oscillator.connect(gain); + + // to silence + gain.gain.value = 0; + gain.connect(waveShaper); + + // convert all signal into 1.0. The non unity values are to detect the use + // of uninitialized buffers (see Bug 1283910). + waveShaper.curve = new Float32Array([ 0.5, 0.5, 0.5, 0.5, 0.5, 1, 1, 0.5, 0.5, 0.5, 0.5, 0.5 ]); + waveShaper.connect(context.destination); + + context.startRendering().then((buffer) => { + var result = buffer.getChannelData(0); + ok(result.every(x => x === 1), "WaveShaper handles zero gain properly"); + SimpleTest.finish(); + }); +}); +</script> +<pre> +</pre> +</body> + |