Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(237)

Issues Search
    My Issues | Starred     Open | Closed | All

Side by Side Diff: third_party/WebKit/LayoutTests/webaudio/Analyser/realtimeanalyser-fft-scaling.html

Issue 2895963003: Apply layout-test-tidy to LayoutTests/webaudio (Closed)
Patch Set: Created 3 years, 7 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
« no previous file with comments | « third_party/WebKit/LayoutTests/webaudio/Analyser/realtimeanalyser-downmix.html ('k') | third_party/WebKit/LayoutTests/webaudio/Analyser/realtimeanalyser-fft-sizing.html » ('j') | third_party/WebKit/LayoutTests/webaudio/tools/layout-test-tidy.js » ('J')
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
OLDNEW
1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 1 <!DOCTYPE html>
2 <html> 2 <html>
3 <head> 3 <head>
4 <title>
5 realtimeanalyser-fft-scaling.html
6 </title>
4 <script src="../../resources/testharness.js"></script> 7 <script src="../../resources/testharness.js"></script>
5 <script src="../../resources/testharnessreport.js"></script> 8 <script src="../../resources/testharnessreport.js"></script>
6 <script src="../resources/audit-util.js"></script> 9 <script src="../resources/audit-util.js"></script>
7 <script src="../resources/audit.js"></script> 10 <script src="../resources/audit.js"></script>
8 </head> 11 </head>
9
10 <body> 12 <body>
11 <div id="description"></div> 13 <div id="description"></div>
12 <div id="console"></div> 14 <div id="console"></div>
13 15 <script id="layout-test-code">
14 <script>
15 let audit = Audit.createTaskRunner(); 16 let audit = Audit.createTaskRunner();
16 17
17 // The number of analysers. We have analysers from size for each of the 18 // The number of analysers. We have analysers from size for each of the
18 // possible sizes of 2^5 to 2^15 for a total of 11. 19 // possible sizes of 2^5 to 2^15 for a total of 11.
19 let numberOfAnalysers = 11; 20 let numberOfAnalysers = 11;
20 let sampleRate = 44100; 21 let sampleRate = 44100;
21 let nyquistFrequency = sampleRate / 2; 22 let nyquistFrequency = sampleRate / 2;
22 23
23 // Frequency of the sine wave test signal. Should be high enough so that we get at least one 24 // Frequency of the sine wave test signal. Should be high enough so that
24 // full cycle for the 32-point FFT. This should also be such that the fre quency should be 25 // we get at least one full cycle for the 32-point FFT. This should also
25 // exactly in one of the FFT bins for each of the possible FFT sizes. 26 // be such that the frequency should be exactly in one of the FFT bins for
26 let oscFrequency = nyquistFrequency/16; 27 // each of the possible FFT sizes.
28 let oscFrequency = nyquistFrequency / 16;
27 29
28 // The actual peak values from each analyser. Useful for examining the re sults in Chrome. 30 // The actual peak values from each analyser. Useful for examining the
31 // results in Chrome.
29 let peakValue = new Array(numberOfAnalysers); 32 let peakValue = new Array(numberOfAnalysers);
30 33
31 // For a 0dBFS sine wave, we would expect the FFT magnitude to be 0dB as w ell, but the 34 // For a 0dBFS sine wave, we would expect the FFT magnitude to be 0dB as
32 // analyzer node applies a Blackman window (to smooth the estimate). This reduces the energy 35 // well, but the analyzer node applies a Blackman window (to smooth the
33 // of the signal so the FFT peak is less than 0dB. The threshold value gi ven here was 36 // estimate). This reduces the energy of the signal so the FFT peak is
34 // determined experimentally. 37 // less than 0dB. The threshold value given here was determined
38 // experimentally.
35 // 39 //
36 // See https://code.google.com/p/chromium/issues/detail?id=341596. 40 // See https://code.google.com/p/chromium/issues/detail?id=341596.
37 let peakThreshold = [-14.43, -13.56, -13.56, -13.56, -13.56, -13.56, 41 let peakThreshold = [
38 -13.56, -13.56, -13.56, -13.56, -13.56 42 -14.43, -13.56, -13.56, -13.56, -13.56, -13.56, -13.56, -13.56, -13.56,
43 -13.56, -13.56
39 ]; 44 ];
40 45
41 function checkResult(order, analyser, should) { 46 function checkResult(order, analyser, should) {
42 return function () { 47 return function() {
43 let index = order - 5; 48 let index = order - 5;
44 let fftSize = 1 << order; 49 let fftSize = 1 << order;
45 let fftData = new Float32Array(fftSize); 50 let fftData = new Float32Array(fftSize);
46 analyser.getFloatFrequencyData(fftData); 51 analyser.getFloatFrequencyData(fftData);
47 52
48 // Compute the frequency bin that should contain the peak. 53 // Compute the frequency bin that should contain the peak.
49 let expectedBin = analyser.frequencyBinCount * (oscFrequency / nyq uistFrequency); 54 let expectedBin =
55 analyser.frequencyBinCount * (oscFrequency / nyquistFrequency);
50 56
51 // Find the actual bin by finding the bin containing the peak. 57 // Find the actual bin by finding the bin containing the peak.
52 let actualBin = 0; 58 let actualBin = 0;
53 peakValue[index] = -1000; 59 peakValue[index] = -1000;
54 for (k = 0; k < analyser.frequencyBinCount; ++k) { 60 for (k = 0; k < analyser.frequencyBinCount; ++k) {
55 if (fftData[k] > peakValue[index]) { 61 if (fftData[k] > peakValue[index]) {
56 actualBin = k; 62 actualBin = k;
57 peakValue[index] = fftData[k]; 63 peakValue[index] = fftData[k];
58 } 64 }
59 } 65 }
60 66
61 should(actualBin, (1 << order) + "-point FFT peak position") 67 should(actualBin, (1 << order) + '-point FFT peak position')
62 .beEqualTo(expectedBin); 68 .beEqualTo(expectedBin);
63 69
64 should(peakValue[index], (1 << order) + 70 should(
65 "-point FFT peak value in dBFS") 71 peakValue[index], (1 << order) + '-point FFT peak value in dBFS')
66 .beGreaterThanOrEqualTo(peakThreshold[index]); 72 .beGreaterThanOrEqualTo(peakThreshold[index]);
67 } 73 }
68 } 74 }
69 75
70 audit.define({ 76 audit.define(
71 label: "FFT scaling tests", 77 {
72 description: "Test Scaling of FFT in AnalyserNode" 78 label: 'FFT scaling tests',
73 }, function (task, should) { 79 description: 'Test Scaling of FFT in AnalyserNode'
74 let tests = []; 80 },
75 for (let k = 5; k <= 15; ++k) 81 function(task, should) {
76 tests.push(runTest(k, should)); 82 let tests = [];
83 for (let k = 5; k <= 15; ++k)
84 tests.push(runTest(k, should));
77 85
78 // The order in which the tests finish is not important. 86 // The order in which the tests finish is not important.
79 Promise.all(tests) 87 Promise.all(tests).then(task.done.bind(task));
80 .then(task.done.bind(task)); 88 });
81 });
82 89
83 function runTest(order, should) { 90 function runTest(order, should) {
84 let context = new OfflineAudioContext(1, 1 << order, sampleRate); 91 let context = new OfflineAudioContext(1, 1 << order, sampleRate);
85 // Use a sine wave oscillator as the reference source signal. 92 // Use a sine wave oscillator as the reference source signal.
86 let osc = context.createOscillator(); 93 let osc = context.createOscillator();
87 osc.type = "sine"; 94 osc.type = 'sine';
88 osc.frequency.value = oscFrequency; 95 osc.frequency.value = oscFrequency;
89 osc.connect(context.destination); 96 osc.connect(context.destination);
90 97
91 let analyser = context.createAnalyser(); 98 let analyser = context.createAnalyser();
92 // No smoothing to simplify the analysis of the result. 99 // No smoothing to simplify the analysis of the result.
93 analyser.smoothingTimeConstant = 0; 100 analyser.smoothingTimeConstant = 0;
94 analyser.fftSize = 1 << order; 101 analyser.fftSize = 1 << order;
95 osc.connect(analyser); 102 osc.connect(analyser);
96 103
97 osc.start(); 104 osc.start();
98 context.oncomplete = checkResult(order, analyser, should); 105 context.oncomplete = checkResult(order, analyser, should);
99 return context.startRendering() 106 return context.startRendering().then(function(audioBuffer) {
100 .then(function (audioBuffer) { 107 checkResult(audioBuffer, order, analyser);
101 checkResult(audioBuffer, order, analyser); 108 });
102 });
103 } 109 }
104 110
105 audit.run(); 111 audit.run();
106 </script> 112 </script>
107 </body> 113 </body>
108 </html> 114 </html>
OLDNEW
« no previous file with comments | « third_party/WebKit/LayoutTests/webaudio/Analyser/realtimeanalyser-downmix.html ('k') | third_party/WebKit/LayoutTests/webaudio/Analyser/realtimeanalyser-fft-sizing.html » ('j') | third_party/WebKit/LayoutTests/webaudio/tools/layout-test-tidy.js » ('J')

Powered by Google App Engine
This is Rietveld 408576698