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| (Empty) |
| 1 <!doctype html> | |
| 2 <html> | |
| 3 <head> | |
| 4 <script src="../resources/js-test.js"></script> | |
| 5 <script src="resources/compatibility.js"></script> | |
| 6 <script src="resources/audit-util.js"></script> | |
| 7 <script src="resources/audio-testing.js"></script> | |
| 8 <title>Test getFloatFrequencyData With Zero Inputs</title> | |
| 9 </head> | |
| 10 | |
| 11 <body> | |
| 12 <script> | |
| 13 description("Test AnalyserNode getFloatFrequencyData With Zero-Valued Inpu
t"); | |
| 14 window.jsTestIsAsync = true; | |
| 15 | |
| 16 var sampleRate = 48000; | |
| 17 | |
| 18 // Render enough data to run the test. | |
| 19 var renderFrames = 2*1024; | |
| 20 var renderDuration = renderFrames / sampleRate; | |
| 21 | |
| 22 var audit = Audit.createTaskRunner(); | |
| 23 | |
| 24 | |
| 25 // Test that getFloatFrequencyData returns -Infinity when the input is all
-zeroes. | |
| 26 audit.defineTask("zero input", function (done) { | |
| 27 var context = new OfflineAudioContext(1, renderFrames, sampleRate); | |
| 28 | |
| 29 // Constant source of 0's. | |
| 30 var source = context.createBufferSource(); | |
| 31 source.buffer = createConstantBuffer(context, 1, 0); | |
| 32 source.loop = true; | |
| 33 | |
| 34 // Create analyser and use some non-default minDecibels value. | |
| 35 var analyser = context.createAnalyser(); | |
| 36 analyser.minDecibels = -123; | |
| 37 | |
| 38 source.connect(analyser); | |
| 39 analyser.connect(context.destination); | |
| 40 | |
| 41 source.start(); | |
| 42 | |
| 43 // Suspend after some number of frames and grab the float frequency data
. | |
| 44 context.suspend(1024 / sampleRate).then(function () { | |
| 45 var f = new Float32Array(analyser.frequencyBinCount); | |
| 46 analyser.getFloatFrequencyData(f); | |
| 47 | |
| 48 Should("getFloatFrequencyData() with zero-valued input", f) | |
| 49 .beConstantValueOf(-Infinity); | |
| 50 }).then(context.resume.bind(context)); | |
| 51 | |
| 52 context.startRendering().then(done); | |
| 53 }); | |
| 54 | |
| 55 audit.defineTask("finish", function (done) { | |
| 56 finishJSTest(); | |
| 57 done(); | |
| 58 }); | |
| 59 | |
| 60 audit.runTasks(); | |
| 61 | |
| 62 </script> | |
| 63 </body> | |
| 64 </html> | |
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Chromium Code Reviews
Issue 2581463002:
Refactor WebAudio test directory (Closed)
