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| 1 <!doctype html> |
| 2 <html> |
| 3 <head> |
| 4 <script src="../../resources/testharness.js"></script> |
| 5 <script src="../../resources/testharnessreport.js"></script> |
| 6 <script src="../resources/audit-util.js"></script> |
| 7 <script src="../resources/audit.js"></script> |
| 8 <title>Handle Silent Inputs to AnalyserNode</title> |
| 9 </head> |
| 10 |
| 11 <body> |
| 12 <script> |
| 13 let audit = Audit.createTaskRunner(); |
| 14 let sampleRate = 16000; |
| 15 let renderDuration = 1; |
| 16 let renderFrames = renderDuration * sampleRate; |
| 17 |
| 18 audit.define('connected', function(task, should) { |
| 19 task.describe('Test handling of silent inputs'); |
| 20 |
| 21 tester(should, false).then(task.done.bind(task)); |
| 22 }); |
| 23 |
| 24 audit.define('auto-pull', function(task, should) { |
| 25 task.describe('Test handling of silent inputs'); |
| 26 |
| 27 tester(should, true).then(task.done.bind(task)); |
| 28 }); |
| 29 |
| 30 audit.run(); |
| 31 |
| 32 function tester(should, isAutoPullTest) { |
| 33 // Connect an oscillator to an analyser for testing the time data of the |
| 34 // analyser after the oscillator stops. |
| 35 let context = new OfflineAudioContext(1, renderFrames, sampleRate); |
| 36 let source = new OscillatorNode(context); |
| 37 let analyser = new AnalyserNode(context, {fftSize: 128}); |
| 38 let timeData = new Float32Array(analyser.fftSize); |
| 39 timeData.fill(NaN); |
| 40 |
| 41 source.connect(analyser); |
| 42 |
| 43 // For the automatic pull test, leave the analyser output disconnected. |
| 44 if (isAutoPullTest) { |
| 45 source.connect(context.destination); |
| 46 } else { |
| 47 analyser.connect(context.destination); |
| 48 } |
| 49 |
| 50 source.start(); |
| 51 |
| 52 // Stop the source well in advance of when we want to get the time data |
| 53 // from the analyser. |
| 54 let stopTime = 0.1; |
| 55 let dataTime = 0.5; |
| 56 |
| 57 source.stop(stopTime); |
| 58 context.suspend(dataTime) |
| 59 .then(() => { analyser.getFloatTimeDomainData(timeData); }) |
| 60 .then(context.resume.bind(context)); |
| 61 |
| 62 return context.startRendering().then(buffer => { |
| 63 should(timeData, 'Analyser time data at time ' + dataTime) |
| 64 .beConstantValueOf(0); |
| 65 }); |
| 66 } |
| 67 </script> |
| 68 </body> |
| 69 </html> |
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Chromium Code Reviews
Issue 2666063003:
Continue to process AnalyserNode if inputs are silent. (Closed)
