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Issue 2895963003: Apply layout-test-tidy to LayoutTests/webaudio (Closed)
Patch Set: Created 3 years, 7 months ago
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« no previous file with comments | « third_party/WebKit/LayoutTests/webaudio/StereoPanner/stereopannernode-panning.html ('k') | third_party/WebKit/LayoutTests/webaudio/WaveShaper/waveshaper-364379.html » ('j') | third_party/WebKit/LayoutTests/webaudio/tools/layout-test-tidy.js » ('J')
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1 <!DOCTYPE html> 1 <!DOCTYPE html>
2 <html>
3 <head>
4 <title>
5 waveshaper.html
6 </title>
7 <script src="../../resources/testharness.js"></script>
8 <script src="../../resources/testharnessreport.js"></script>
9 <script src="../resources/audit-util.js"></script>
10 <script src="../resources/audit.js"></script>
11 <script src="../resources/buffer-loader.js"></script>
12 </head>
13 <body>
14 <script id="layout-test-code">
15 let audit = Audit.createTaskRunner();
2 16
3 <html> 17 let sampleRate = 44100;
4 <head> 18 let lengthInSeconds = 4;
5 <script src="../../resources/testharness.js"></script> 19 let numberOfRenderFrames = sampleRate * lengthInSeconds;
6 <script src="../../resources/testharnessreport.js"></script> 20 let numberOfCurveFrames = 65536;
7 <script src="../resources/audit-util.js"></script> 21 let inputBuffer;
8 <script src="../resources/audit.js"></script> 22 let waveShapingCurve;
9 <script type="text/javascript" src="../resources/buffer-loader.js"></script>
10 </head>
11 23
12 <body> 24 let context;
13 <script>
14 var audit = Audit.createTaskRunner();
15 25
16 var sampleRate = 44100; 26 function generateInputBuffer() {
17 var lengthInSeconds = 4; 27 // Create mono input buffer.
18 var numberOfRenderFrames = sampleRate * lengthInSeconds; 28 let buffer =
19 var numberOfCurveFrames = 65536; 29 context.createBuffer(1, numberOfRenderFrames, context.sampleRate);
20 var inputBuffer; 30 let data = buffer.getChannelData(0);
21 var waveShapingCurve;
22 31
23 var context; 32 // Generate an input vector with values from -1 -> +1 over a duration of
33 // lengthInSeconds. This exercises the full nominal input range and will
34 // touch every point of the shaping curve.
35 for (let i = 0; i < numberOfRenderFrames; ++i) {
36 let x = i / numberOfRenderFrames; // 0 -> 1
37 x = 2 * x - 1; // -1 -> +1
38 data[i] = x;
39 }
24 40
25 function generateInputBuffer() { 41 return buffer;
26 // Create mono input buffer. 42 }
27 var buffer = context.createBuffer(1, numberOfRenderFrames, context.sampleRat e);
28 var data = buffer.getChannelData(0);
29
30 // Generate an input vector with values from -1 -> +1 over a duration of len gthInSeconds.
31 // This exercises the full nominal input range and will touch every point of the shaping curve.
32 for (var i = 0; i < numberOfRenderFrames; ++i) {
33 var x = i / numberOfRenderFrames; // 0 -> 1
34 x = 2 * x - 1; // -1 -> +1
35 data[i] = x;
36 }
37 43
38 return buffer; 44 // Generates a symmetric curve: Math.atan(5 * x) / (0.5 * Math.PI)
39 } 45 // (with x == 0 corresponding to the center of the array)
46 // This curve is arbitrary, but would be useful in the real-world.
47 // To some extent, the actual curve we choose is not important in this
48 // test, since the input vector walks through all possible curve values.
49 function generateWaveShapingCurve() {
50 let curve = new Float32Array(numberOfCurveFrames);
40 51
41 // Generates a symmetric curve: Math.atan(5 * x) / (0.5 * Math.PI) 52 let n = numberOfCurveFrames;
42 // (with x == 0 corresponding to the center of the array) 53 let n2 = n / 2;
43 // This curve is arbitrary, but would be useful in the real-world.
44 // To some extent, the actual curve we choose is not important in this test,
45 // since the input vector walks through all possible curve values.
46 function generateWaveShapingCurve() {
47 var curve = new Float32Array(numberOfCurveFrames);
48
49 var n = numberOfCurveFrames;
50 var n2 = n / 2;
51
52 for (var i = 0; i < n; ++i) {
53 var x = (i - n2) / n2;
54 var y = Math.atan(5 * x) / (0.5 * Math.PI);
55 }
56 54
57 return curve; 55 for (let i = 0; i < n; ++i) {
58 } 56 let x = (i - n2) / n2;
57 let y = Math.atan(5 * x) / (0.5 * Math.PI);
58 }
59 59
60 function checkShapedCurve(buffer, should) { 60 return curve;
61 var inputData = inputBuffer.getChannelData(0); 61 }
62 var outputData = buffer.getChannelData(0);
63 62
64 var success = true; 63 function checkShapedCurve(buffer, should) {
65 64 let inputData = inputBuffer.getChannelData(0);
66 // Go through every sample and make sure it has been shaped exactly accordin g to the shaping curve we gave it. 65 let outputData = buffer.getChannelData(0);
67 for (var i = 0; i < buffer.length; ++i) {
68 var input = inputData[i];
69
70 // Calculate an index based on input -1 -> +1 with 0 being at the center of the curve data.
71 var index = Math.floor(numberOfCurveFrames * 0.5 * (input + 1));
72 66
73 // Clip index to the input range of the curve. 67 let success = true;
74 // This takes care of input outside of nominal range -1 -> +1
75 index = index < 0 ? 0 : index;
76 index = index > numberOfCurveFrames - 1 ? numberOfCurveFrames - 1 : inde x;
77 68
78 var expectedOutput = waveShapingCurve[index]; 69 // Go through every sample and make sure it has been shaped exactly
79 70 // according to the shaping curve we gave it.
80 var output = outputData[i]; 71 for (let i = 0; i < buffer.length; ++i) {
81 72 let input = inputData[i];
82 if (output != expectedOutput) { 73
74 // Calculate an index based on input -1 -> +1 with 0 being at the
75 // center of the curve data.
76 let index = Math.floor(numberOfCurveFrames * 0.5 * (input + 1));
77
78 // Clip index to the input range of the curve.
79 // This takes care of input outside of nominal range -1 -> +1
80 index = index < 0 ? 0 : index;
81 index =
82 index > numberOfCurveFrames - 1 ? numberOfCurveFrames - 1 : index;
83
84 let expectedOutput = waveShapingCurve[index];
85
86 let output = outputData[i];
87
88 if (output != expectedOutput) {
83 success = false; 89 success = false;
84 break; 90 break;
91 }
85 } 92 }
86 }
87 93
88 should(success, "WaveShaperNode applied non-linear distortion correctly") 94 should(
89 .beTrue(); 95 success, 'WaveShaperNode applied non-linear distortion correctly')
90 } 96 .beTrue();
97 }
91 98
92 audit.define("test", function (task, should) { 99 audit.define('test', function(task, should) {
93 // Create offline audio context. 100 // Create offline audio context.
94 context = new OfflineAudioContext(1, numberOfRenderFrames, sampleRate); 101 context = new OfflineAudioContext(1, numberOfRenderFrames, sampleRate);
95
96 // source -> waveshaper -> destination
97 var source = context.createBufferSource();
98 var waveshaper = context.createWaveShaper();
99 source.connect(waveshaper);
100 waveshaper.connect(context.destination);
101 102
102 // Create an input test vector. 103 // source -> waveshaper -> destination
103 inputBuffer = generateInputBuffer(); 104 let source = context.createBufferSource();
104 source.buffer = inputBuffer; 105 let waveshaper = context.createWaveShaper();
105 106 source.connect(waveshaper);
106 // We'll apply non-linear distortion according to this shaping curve. 107 waveshaper.connect(context.destination);
107 waveShapingCurve = generateWaveShapingCurve();
108 waveshaper.curve = waveShapingCurve;
109
110 source.start(0);
111
112 context.startRendering()
113 .then(buffer => checkShapedCurve(buffer, should))
114 .then(task.done.bind(task));
115 });
116 108
117 audit.run(); 109 // Create an input test vector.
110 inputBuffer = generateInputBuffer();
111 source.buffer = inputBuffer;
118 112
119 </script> 113 // We'll apply non-linear distortion according to this shaping curve.
114 waveShapingCurve = generateWaveShapingCurve();
115 waveshaper.curve = waveShapingCurve;
120 116
121 </body> 117 source.start(0);
118
119 context.startRendering()
120 .then(buffer => checkShapedCurve(buffer, should))
121 .then(task.done.bind(task));
122 });
123
124 audit.run();
125 </script>
126 </body>
122 </html> 127 </html>
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« no previous file with comments | « third_party/WebKit/LayoutTests/webaudio/StereoPanner/stereopannernode-panning.html ('k') | third_party/WebKit/LayoutTests/webaudio/WaveShaper/waveshaper-364379.html » ('j') | third_party/WebKit/LayoutTests/webaudio/tools/layout-test-tidy.js » ('J')

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