<!DOCTYPE HTML> <html> <head> <title>Test AudioParam.setTargetAtTime with zero time constant</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"> var V0 = 0.9; var V1 = 0.1; var T0 = 0; var TimeConstant = 0; var gTest = { length: 2048, numberOfChannels: 1, createGraph(context) { var sourceBuffer = context.createBuffer(1, 2048, context.sampleRate); for (var i = 0; i < 2048; ++i) { sourceBuffer.getChannelData(0)[i] = 1; } var source = context.createBufferSource(); source.buffer = sourceBuffer; var gain = context.createGain(); gain.gain.value = V0; gain.gain.setTargetAtTime(V1, T0, TimeConstant); source.connect(gain); source.start(0); return gain; }, createExpectedBuffers(context) { var T1 = 2048 / context.sampleRate; var expectedBuffer = context.createBuffer(1, 2048, context.sampleRate); for (var i = 0; i < 2048; ++i) { var t = i / context.sampleRate; expectedBuffer.getChannelData(0)[i] = V1; } return expectedBuffer; }, }; SimpleTest.waitForExplicitFinish(); // Comparing different AudioContexts may result in different timing reated information being reported // when we jitter time, as they are on different Relative Timelines. SpecialPowers.pushPrefEnv({"set": [["privacy.resistFingerprinting.reduceTimerPrecision.jitter", false]]}, runTest); </script> </pre> </body> </html>