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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_pannerNodeHRTFSymmetry.html | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip | |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/media/webaudio/test/test_pannerNodeHRTFSymmetry.html')
| -rw-r--r-- | dom/media/webaudio/test/test_pannerNodeHRTFSymmetry.html | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/dom/media/webaudio/test/test_pannerNodeHRTFSymmetry.html b/dom/media/webaudio/test/test_pannerNodeHRTFSymmetry.html new file mode 100644 index 0000000000..abd03b3898 --- /dev/null +++ b/dom/media/webaudio/test/test_pannerNodeHRTFSymmetry.html @@ -0,0 +1,107 @@ +<!DOCTYPE HTML> +<html> +<head> + <title>Test left/right symmetry and block-offset invariance of HRTF panner</title> + <script 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(); + +const blockSize = 128; +const bufferSize = 4096; // > HRTF panner latency + +var ctx = new AudioContext(); + +function isChannelSilent(channel) { + for (var i = 0; i < channel.length; ++i) { + if (channel[i] != 0.0) { + return false; + } + } + return true; +} + +function startTest() { + var leftPanner = ctx.createPanner(); + var rightPanner = ctx.createPanner(); + leftPanner.panningModel = "HRTF"; + rightPanner.panningModel = "HRTF"; + leftPanner.positionX.value = -1; + rightPanner.positionX.value = 1; + + // Test that PannerNode processes the signal consistently irrespective of + // the offset in the processing block. This is done by inserting a delay of + // less than a block size before one panner. + const delayTime = 0.7 * blockSize / ctx.sampleRate; + var leftDelay = ctx.createDelay(delayTime); + leftDelay.delayTime.value = delayTime; + leftDelay.connect(leftPanner); + // and compensating for the delay after the other. + var rightDelay = ctx.createDelay(delayTime); + rightDelay.delayTime.value = delayTime; + rightPanner.connect(rightDelay); + + // Feed the panners with a signal having some harmonics to fill the spectrum. + var oscillator = ctx.createOscillator(); + oscillator.frequency.value = 110; + oscillator.type = "sawtooth"; + oscillator.connect(leftDelay); + oscillator.connect(rightPanner); + oscillator.start(0); + + // Switch the channels on one panner output, and it should match the other. + var splitter = ctx.createChannelSplitter(); + leftPanner.connect(splitter); + var merger = ctx.createChannelMerger(); + splitter.connect(merger, 0, 1); + splitter.connect(merger, 1, 0); + + // Invert one signal so that mixing with the other will find the difference. + var gain = ctx.createGain(); + gain.gain.value = -1.0; + merger.connect(gain); + + var processor = ctx.createScriptProcessor(bufferSize, 2, 0); + gain.connect(processor); + rightDelay.connect(processor); + processor.onaudioprocess = + function(e) { + compareBuffers(e.inputBuffer, + ctx.createBuffer(2, bufferSize, ctx.sampleRate)); + e.target.onaudioprocess = null; + SimpleTest.finish(); + } +} + +function prepareTest() { + // A PannerNode will produce no output until it has loaded its HRIR + // database. Wait for this to load before starting the test. + var processor = ctx.createScriptProcessor(bufferSize, 2, 0); + var panner = ctx.createPanner(); + panner.panningModel = "HRTF"; + panner.connect(processor); + var oscillator = ctx.createOscillator(); + oscillator.connect(panner); + oscillator.start(0); + + processor.onaudioprocess = + function(e) { + if (isChannelSilent(e.inputBuffer.getChannelData(0))) + return; + + oscillator.stop(0); + panner.disconnect(); + e.target.onaudioprocess = null; + startTest(); + }; +} +prepareTest(); +</script> +</pre> +</body> +</html> |