| <!DOCTYPE html> |
| <html class="a"> |
| <head> |
| <title>Cycles without DelayNode in audio node graph</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| </head> |
| <body> |
| <script> |
| function doTest() { |
| var off = new OfflineAudioContext(1, 512, 48000); |
| var osc = new OscillatorNode(off); |
| var fb = new GainNode(off); |
| // zero delay feedback loop |
| osc.connect(fb).connect(fb).connect(off.destination); |
| osc.start(0); |
| return off.startRendering().then((b) => { |
| return Promise.resolve(b.getChannelData(0)); |
| }); |
| } |
| |
| promise_test(() => { |
| return doTest().then(samples => { |
| var silent = true; |
| for (var i = 0; i < samples.length; i++) { |
| if (samples[i] != 0.0) { |
| silent = false; |
| break; |
| } |
| } |
| assert_true(silent); |
| }); |
| }, 'Test that cycles that don\'t contain a DelayNode are muted'); |
| </script> |
| </body> |
| </html> |
