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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 01:47:29 +0000 |
| commit | 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch) | |
| tree | a31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /dom/media/webaudio/test/test_delayNodeCycles.html | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-upstream/115.8.0esr.tar.xz firefox-esr-upstream/115.8.0esr.zip | |
Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/media/webaudio/test/test_delayNodeCycles.html')
| -rw-r--r-- | dom/media/webaudio/test/test_delayNodeCycles.html | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/dom/media/webaudio/test/test_delayNodeCycles.html b/dom/media/webaudio/test/test_delayNodeCycles.html new file mode 100644 index 0000000000..82c5f62504 --- /dev/null +++ b/dom/media/webaudio/test/test_delayNodeCycles.html @@ -0,0 +1,157 @@ +<!DOCTYPE HTML> +<html> +<head> + <title>Test the support of cycles.</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 src="webaudio.js" type="text/javascript"></script> +<script class="testbody" type="text/javascript"> + +SimpleTest.waitForExplicitFinish(); + +const sampleRate = 48000; +const inputLength = 2048; + +addLoadEvent(function() { + function addSine(b) { + for (var i = 0; i < b.length; i++) { + b[i] += Math.sin(440 * 2 * Math.PI * i / sampleRate); + } + } + + function getSineBuffer(ctx) { + var buffer = ctx.createBuffer(1, inputLength, ctx.sampleRate); + addSine(buffer.getChannelData(0)); + return buffer; + } + + function createAndPlayWithCycleAndDelayNode(ctx, delayFrames) { + var source = ctx.createBufferSource(); + source.buffer = getSineBuffer(ctx); + + var gain = ctx.createGain(); + var delay = ctx.createDelay(); + delay.delayTime.value = delayFrames/ctx.sampleRate; + + source.connect(gain); + gain.connect(delay); + delay.connect(ctx.destination); + // cycle + delay.connect(gain); + + source.start(0); + } + + function createAndPlayWithCycleAndNoDelayNode(ctx) { + var source = ctx.createBufferSource(); + source.loop = true; + source.buffer = getSineBuffer(ctx); + + var gain = ctx.createGain(); + var gain2 = ctx.createGain(); + + source.connect(gain); + gain.connect(gain2); + // cycle + gain2.connect(gain); + gain2.connect(ctx.destination); + + source.start(0); + } + + function createAndPlayWithCycleAndNoDelayNodeInCycle(ctx) { + var source = ctx.createBufferSource(); + source.loop = true; + source.buffer = getSineBuffer(ctx); + + var delay = ctx.createDelay(); + var gain = ctx.createGain(); + var gain2 = ctx.createGain(); + + // Their is a cycle, a delay, but the delay is not in the cycle. + source.connect(delay); + delay.connect(gain); + gain.connect(gain2); + // cycle + gain2.connect(gain); + gain2.connect(ctx.destination); + + source.start(0); + } + + var remainingTests = 0; + function finish() { + if (--remainingTests == 0) { + SimpleTest.finish(); + } + } + + function getOfflineContext(oncomplete) { + var ctx = new OfflineAudioContext(1, sampleRate, sampleRate); + ctx.oncomplete = oncomplete; + return ctx; + } + + function checkSilentBuffer(e) { + var buffer = e.renderedBuffer.getChannelData(0); + for (var i = 0; i < buffer.length; i++) { + if (buffer[i] != 0.0) { + ok(false, "buffer should be silent."); + finish(); + return; + } + } + ok(true, "buffer should be silent."); + finish(); + } + + function checkNoisyBuffer(e, aDelayFrames) { + delayFrames = Math.max(128, aDelayFrames); + + var expected = new Float32Array(e.renderedBuffer.length); + for (var i = delayFrames; i < expected.length; i += delayFrames) { + addSine(expected.subarray(i, i + inputLength)); + } + + compareChannels(e.renderedBuffer.getChannelData(0), expected); + finish(); + } + + function expectSilentOutput(f) { + remainingTests++; + var ctx = getOfflineContext(checkSilentBuffer); + f(ctx); + ctx.startRendering(); + } + + function expectNoisyOutput(delayFrames) { + remainingTests++; + var ctx = getOfflineContext(); + ctx.oncomplete = function(e) { checkNoisyBuffer(e, delayFrames); }; + createAndPlayWithCycleAndDelayNode(ctx, delayFrames); + ctx.startRendering(); + } + + // This is trying to make a graph with a cycle and no DelayNode in the graph. + // The cycle subgraph should be muted, in this graph the output should be silent. + expectSilentOutput(createAndPlayWithCycleAndNoDelayNode); + // This is trying to make a graph with a cycle and a DelayNode in the graph, but + // not part of the cycle. + // The cycle subgraph should be muted, in this graph the output should be silent. + expectSilentOutput(createAndPlayWithCycleAndNoDelayNodeInCycle); + // Those are making legal graphs, with at least one DelayNode in the cycle. + // There should be some non-silent output. + expectNoisyOutput(sampleRate/4); + // DelayNode.delayTime will be clamped to 128/ctx.sampleRate. + // There should be some non-silent output. + expectNoisyOutput(0); +}); + +</script> +</pre> +</body> +</html> |