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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_delayNodeChannelChanges.html | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.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_delayNodeChannelChanges.html')
| -rw-r--r-- | dom/media/webaudio/test/test_delayNodeChannelChanges.html | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/dom/media/webaudio/test/test_delayNodeChannelChanges.html b/dom/media/webaudio/test/test_delayNodeChannelChanges.html new file mode 100644 index 0000000000..d40c792ef7 --- /dev/null +++ b/dom/media/webaudio/test/test_delayNodeChannelChanges.html @@ -0,0 +1,98 @@ +<!DOCTYPE HTML> +<html> +<head> + <title>test DelayNode channel count changes</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(); +SimpleTest.requestCompleteLog(); + +const bufferSize = 4096; + +var ctx; +var testDelay; +var stereoDelay; +var invertor; + +function compareOutputs(callback) { + var processor = ctx.createScriptProcessor(bufferSize, 2, 0); + testDelay.connect(processor); + invertor.connect(processor); + processor.onaudioprocess = + function(e) { + compareBuffers(e.inputBuffer, + ctx.createBuffer(2, bufferSize, ctx.sampleRate)); + e.target.onaudioprocess = null; + callback(); + } +} + +function startTest() { + // And a two-channel signal + var merger = ctx.createChannelMerger(); + merger.connect(testDelay); + merger.connect(stereoDelay); + var oscL = ctx.createOscillator(); + oscL.connect(merger, 0, 0); + oscL.start(0); + var oscR = ctx.createOscillator(); + oscR.type = "sawtooth"; + oscR.connect(merger, 0, 1); + oscR.start(0); + + compareOutputs( + function () { + // Disconnect the two-channel signal and test again + merger.disconnect(); + compareOutputs(SimpleTest.finish); + }); +} + +function prepareTest() { + ctx = new AudioContext(); + + // The output of a test delay node with mono and stereo input will be + // compared with that of separate mono and stereo delay nodes. + const delayTime = 0.3 * bufferSize / ctx.sampleRate; + testDelay = ctx.createDelay(delayTime); + testDelay.delayTime.value = delayTime; + monoDelay = ctx.createDelay(delayTime); + monoDelay.delayTime.value = delayTime; + stereoDelay = ctx.createDelay(delayTime); + stereoDelay.delayTime.value = delayTime; + + // Create a one-channel signal and connect to the delay nodes + var monoOsc = ctx.createOscillator(); + monoOsc.frequency.value = 110; + monoOsc.connect(testDelay); + monoOsc.connect(monoDelay); + monoOsc.start(0); + + // Invert the expected so that mixing with the test will find the difference. + invertor = ctx.createGain(); + invertor.gain.value = -1.0; + monoDelay.connect(invertor); + stereoDelay.connect(invertor); + + // Start the test after the delay nodes have begun processing. + var processor = ctx.createScriptProcessor(bufferSize, 1, 0); + processor.connect(ctx.destination); + + processor.onaudioprocess = + function(e) { + e.target.onaudioprocess = null; + processor.disconnect(); + startTest(); + }; +} +prepareTest(); +</script> +</pre> +</body> +</html> |