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Issue 2677453005: Convert WaveShaper tests to testharness (Closed)
Patch Set: Address review comments Created 3 years, 10 months ago
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1 <!DOCTYPE html> 1 <!DOCTYPE html>
2 2
3 <html> 3 <html>
4 <head> 4 <head>
5 <script src="../../resources/js-test.js"></script> 5 <script src="../../resources/testharness.js"></script>
6 <script src="../../resources/testharnessreport.js"></script>
6 <script src="../resources/audit-util.js"></script> 7 <script src="../resources/audit-util.js"></script>
7 <script src="../resources/audio-testing.js"></script> 8 <script src="../resources/audit.js"></script>
8 <script type="text/javascript" src="../resources/buffer-loader.js"></script> 9 <script type="text/javascript" src="../resources/buffer-loader.js"></script>
9 </head> 10 </head>
10 11
11 <body> 12 <body>
12
13 <div id="description"></div>
14 <div id="console"></div>
15
16 <script> 13 <script>
17 description("Tests that WaveShaperNode applies proper non-linear distortion."); 14 var audit = Audit.createTaskRunner();
18 15
19 var sampleRate = 44100; 16 var sampleRate = 44100;
20 var lengthInSeconds = 4; 17 var lengthInSeconds = 4;
21 var numberOfRenderFrames = sampleRate * lengthInSeconds; 18 var numberOfRenderFrames = sampleRate * lengthInSeconds;
22 var numberOfCurveFrames = 65536; 19 var numberOfCurveFrames = 65536;
23 var inputBuffer; 20 var inputBuffer;
24 var waveShapingCurve; 21 var waveShapingCurve;
25 22
26 var context; 23 var context;
27 24
(...skipping 25 matching lines...) Expand all
53 var n2 = n / 2; 50 var n2 = n / 2;
54 51
55 for (var i = 0; i < n; ++i) { 52 for (var i = 0; i < n; ++i) {
56 var x = (i - n2) / n2; 53 var x = (i - n2) / n2;
57 var y = Math.atan(5 * x) / (0.5 * Math.PI); 54 var y = Math.atan(5 * x) / (0.5 * Math.PI);
58 } 55 }
59 56
60 return curve; 57 return curve;
61 } 58 }
62 59
63 function checkShapedCurve(event) { 60 function checkShapedCurve(buffer, should) {
64 var buffer = event.renderedBuffer;
65
66 var inputData = inputBuffer.getChannelData(0); 61 var inputData = inputBuffer.getChannelData(0);
67 var outputData = buffer.getChannelData(0); 62 var outputData = buffer.getChannelData(0);
68 63
69 var success = true; 64 var success = true;
70 65
71 // Go through every sample and make sure it has been shaped exactly accordin g to the shaping curve we gave it. 66 // Go through every sample and make sure it has been shaped exactly accordin g to the shaping curve we gave it.
72 for (var i = 0; i < buffer.length; ++i) { 67 for (var i = 0; i < buffer.length; ++i) {
73 var input = inputData[i]; 68 var input = inputData[i];
74 69
75 // Calculate an index based on input -1 -> +1 with 0 being at the center of the curve data. 70 // Calculate an index based on input -1 -> +1 with 0 being at the center of the curve data.
76 var index = Math.floor(numberOfCurveFrames * 0.5 * (input + 1)); 71 var index = Math.floor(numberOfCurveFrames * 0.5 * (input + 1));
77 72
78 // Clip index to the input range of the curve. 73 // Clip index to the input range of the curve.
79 // This takes care of input outside of nominal range -1 -> +1 74 // This takes care of input outside of nominal range -1 -> +1
80 index = index < 0 ? 0 : index; 75 index = index < 0 ? 0 : index;
81 index = index > numberOfCurveFrames - 1 ? numberOfCurveFrames - 1 : inde x; 76 index = index > numberOfCurveFrames - 1 ? numberOfCurveFrames - 1 : inde x;
82 77
83 var expectedOutput = waveShapingCurve[index]; 78 var expectedOutput = waveShapingCurve[index];
84 79
85 var output = outputData[i]; 80 var output = outputData[i];
86 81
87 if (output != expectedOutput) { 82 if (output != expectedOutput) {
88 success = false; 83 success = false;
89 break; 84 break;
90 } 85 }
91 } 86 }
92 87
93 if (success) { 88 should(success, "WaveShaperNode applied non-linear distortion correctly")
94 testPassed("WaveShaperNode properly applied non-linear distortion."); 89 .beTrue();
95 } else {
96 testFailed("WaveShaperNode did not properly apply non-linear distortion. ");
97 }
98
99 finishJSTest();
100 } 90 }
101 91
102 function runTest() { 92 audit.define("test", function (task, should) {
103 if (window.testRunner) {
104 testRunner.dumpAsText();
105 testRunner.waitUntilDone();
106 }
107
108 window.jsTestIsAsync = true;
109
110 // Create offline audio context. 93 // Create offline audio context.
111 context = new OfflineAudioContext(1, numberOfRenderFrames, sampleRate); 94 context = new OfflineAudioContext(1, numberOfRenderFrames, sampleRate);
112 95
113 // source -> waveshaper -> destination 96 // source -> waveshaper -> destination
114 var source = context.createBufferSource(); 97 var source = context.createBufferSource();
115 var waveshaper = context.createWaveShaper(); 98 var waveshaper = context.createWaveShaper();
116 source.connect(waveshaper); 99 source.connect(waveshaper);
117 waveshaper.connect(context.destination); 100 waveshaper.connect(context.destination);
118 101
119 // Create an input test vector. 102 // Create an input test vector.
120 inputBuffer = generateInputBuffer(); 103 inputBuffer = generateInputBuffer();
121 source.buffer = inputBuffer; 104 source.buffer = inputBuffer;
122 105
123 // We'll apply non-linear distortion according to this shaping curve. 106 // We'll apply non-linear distortion according to this shaping curve.
124 waveShapingCurve = generateWaveShapingCurve(); 107 waveShapingCurve = generateWaveShapingCurve();
125 waveshaper.curve = waveShapingCurve; 108 waveshaper.curve = waveShapingCurve;
126 109
127 source.start(0); 110 source.start(0);
128 111
129 context.oncomplete = checkShapedCurve; 112 context.startRendering()
130 context.startRendering(); 113 .then(buffer => checkShapedCurve(buffer, should))
131 } 114 .then(task.done.bind(task));
115 });
132 116
133 runTest(); 117 audit.run();
134 118
135 </script> 119 </script>
136 120
137 </body> 121 </body>
138 </html> 122 </html>
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