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| 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 <script src="resources/fft.js"></script> | |
| 9 <script src="resources/realtimeanalyser-testing.js"></script> | |
| 10 <title>Test AnalyserNode Downmixing</title> | |
| 11 </head> | |
| 12 | |
| 13 <body> | |
| 14 <script> | |
| 15 description("Test AnalyserNode Downmixing"); | |
| 16 window.jsTestIsAsync = true; | |
| 17 | |
| 18 var sampleRate = 44100; | |
| 19 var renderFrames = 2048; | |
| 20 | |
| 21 var audit = Audit.createTaskRunner(); | |
| 22 | |
| 23 var testConfigs = [{ | |
| 24 channelCount: 1, | |
| 25 message: "mono", | |
| 26 floatRelError: 6.3283e-8 | |
| 27 }, { | |
| 28 channelCount: 2, | |
| 29 message: "stereo", | |
| 30 floatRelError: 1.1681e-7 | |
| 31 }, { | |
| 32 channelCount: 4, | |
| 33 message: "quad", | |
| 34 floatRelError: 4.9793e-7 | |
| 35 }, { | |
| 36 channelCount: 6, | |
| 37 message: "5.1", | |
| 38 floatRelError: 2.0215e-7 | |
| 39 }, { | |
| 40 channelCount: 3, | |
| 41 message: "3-channel", | |
| 42 floatRelError: 6.3283e-8 | |
| 43 }]; | |
| 44 | |
| 45 // Create tasks for each entry in testConfigs | |
| 46 for (k in testConfigs) { | |
| 47 audit.defineTask(testConfigs[k].message, (function (config) { | |
| 48 return function(done) { | |
| 49 runTest(config).then(done); | |
| 50 }; | |
| 51 })(testConfigs[k])); | |
| 52 } | |
| 53 | |
| 54 audit.defineTask("finish", function (done) { | |
| 55 finishJSTest(); | |
| 56 done(); | |
| 57 }); | |
| 58 | |
| 59 audit.runTasks(); | |
| 60 | |
| 61 // Test downmixing of the AnalyserNode time data. We use the downmixing t
hat automatically | |
| 62 // happens in the destination node to generate the reference data which is
compared to the | |
| 63 // data that the Analyser node has captured. | |
| 64 function runTest(options) { | |
| 65 // Context MUST have exactly one channel so that we downmix the source t
o mono to generate | |
| 66 // the reference. | |
| 67 var context = new OfflineAudioContext(1, renderFrames, sampleRate); | |
| 68 | |
| 69 var channels = options.channelCount || 1; | |
| 70 var source = context.createBufferSource(); | |
| 71 | |
| 72 // The signals in each channel. Doesn't matter much what is in here, but
it's best if the | |
| 73 // values aren't linearly increasing so that the average of the values i
sn't one of the | |
| 74 // values (in case the implementation does something silly). Only need
to support up to 6 | |
| 75 // channels. | |
| 76 var bufferValues = [1, 2, 3, 4, 5, 6].map(function (x) { | |
| 77 return x * x | |
| 78 });; | |
| 79 source.buffer = createConstantBuffer(context, renderFrames, bufferValues
.slice(0, channels)); | |
| 80 | |
| 81 var analyser = context.createAnalyser(); | |
| 82 analyser.smoothingTimeConstant = 0; | |
| 83 analyser.fftSize = 256; | |
| 84 | |
| 85 // Run analyser as an automatic pull node. Do NOT connect to the destina
tion. We don't want | |
| 86 // the output of the analyser to mix in with the source that is also dir
ectly connected to | |
| 87 // the destination. | |
| 88 source.connect(analyser); | |
| 89 source.connect(context.destination); | |
| 90 | |
| 91 var timeData = new Float32Array(analyser.fftSize); | |
| 92 var freqData = new Float32Array(analyser.frequencyBinCount); | |
| 93 | |
| 94 var suspendFrame = analyser.fftSize; | |
| 95 context.suspend(suspendFrame / context.sampleRate).then(function () { | |
| 96 analyser.getFloatTimeDomainData(timeData); | |
| 97 analyser.getFloatFrequencyData(freqData); | |
| 98 }).then(context.resume.bind(context)); | |
| 99 | |
| 100 source.start(); | |
| 101 return context.startRendering().then(function (renderedBuffer) { | |
| 102 var success = true; | |
| 103 | |
| 104 // Verify the time domain data is correct. | |
| 105 var prefix = "Analyser downmix " + options.message + " to mono" | |
| 106 success = Should(prefix + " time data", timeData) | |
| 107 .beEqualToArray(renderedBuffer.getChannelData(0).subarray(0, analyse
r.fftSize)); | |
| 108 | |
| 109 var expectedTimeData = renderedBuffer.getChannelData(0).subarray(0, an
alyser.fftSize); | |
| 110 var fftOrder = Math.floor(Math.log2(analyser.fftSize)); | |
| 111 var expectedFreqData = computeFFTMagnitude(expectedTimeData, fftOrder)
.map(linearToDb); | |
| 112 | |
| 113 success = compareFloatFreq(prefix + " freq data", freqData, expectedFr
eqData, { | |
| 114 precision: 6, | |
| 115 floatRelError: options.floatRelError, | |
| 116 }) && success; | |
| 117 | |
| 118 if (success) | |
| 119 testPassed(prefix + " downmixed correctly.\n"); | |
| 120 else | |
| 121 testFailed(prefix + " not downmixed correctly.\n"); | |
| 122 }); | |
| 123 } | |
| 124 </script> | |
| 125 </body> | |
| 126 </html> | |
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Chromium Code Reviews
Issue 2581463002:
Refactor WebAudio test directory (Closed)
