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Diffstat (limited to 'dom/media/webaudio/test/test_biquadFilterNodeWithGain.html')
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diff --git a/dom/media/webaudio/test/test_biquadFilterNodeWithGain.html b/dom/media/webaudio/test/test_biquadFilterNodeWithGain.html new file mode 100644 index 0000000000..d97a753de9 --- /dev/null +++ b/dom/media/webaudio/test/test_biquadFilterNodeWithGain.html @@ -0,0 +1,61 @@ +<!DOCTYPE HTML> +<html> +<head> + <title>Test BiquadFilterNode after a GainNode and tail - Bugs 924286 and 924288</title> + <script src="/tests/SimpleTest/SimpleTest.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"> + +const signalLength = 2048; + +var gTest = { + length: signalLength, + numberOfChannels: 1, + createGraph(context) { + // Two oscillators scheduled sequentially + var signalDuration = signalLength / context.sampleRate; + var osc1 = context.createOscillator(); + osc1.type = "square"; + osc1.start(0); + osc1.stop(signalDuration / 2); + var osc2 = context.createOscillator(); + osc2.start(signalDuration / 2); + osc2.stop(signalDuration); + + // Comparing a biquad on each source with one on both sources checks that + // the biquad on the first source doesn't shut down early. + var biquad1 = context.createBiquadFilter(); + osc1.connect(biquad1); + var biquad2 = context.createBiquadFilter(); + osc2.connect(biquad2); + + var gain = context.createGain(); + gain.gain.value = -1; + osc1.connect(gain); + osc2.connect(gain); + + var biquadWithGain = context.createBiquadFilter(); + gain.connect(biquadWithGain); + + // The output of biquadWithGain should be the inverse of the sum of the + // outputs of biquad1 and biquad2, so blend them together and expect + // silence. + var blend = context.createGain(); + biquad1.connect(blend); + biquad2.connect(blend); + biquadWithGain.connect(blend); + + return blend; + }, +}; + +runTest(); + +</script> +</pre> +</body> +</html> |