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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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1 <!DOCTYPE html> 1 <!DOCTYPE html>
2
3 <!-- 2 <!--
4 Tests that GainNode is properly scaling the gain. 3 Tests that GainNode is properly scaling the gain.
5 We'll render 11 notes, starting at a gain of 1.0, decreasing in gain by 0.1. 4 We'll render 11 notes, starting at a gain of 1.0, decreasing in gain by 0.1.
6 The 11th note will be of gain 0.0, so it should be silent (at the end in the ren dered output). 5 The 11th note will be of gain 0.0, so it should be silent (at the end in the ren dered output).
7 --> 6 -->
7 <html>
8 <head>
9 <title>
10 gain.html
11 </title>
12 <script src="../../resources/testharness.js"></script>
13 <script src="../../resources/testharnessreport.js"></script>
14 <script src="../resources/audit-util.js"></script>
15 <script src="../resources/audit.js"></script>
16 <script src="../resources/buffer-loader.js"></script>
17 </head>
18 <body>
19 <script id="layout-test-code">
20 let audit = Audit.createTaskRunner();
8 21
9 <html> 22 let sampleRate = 44100.0;
10 <head> 23 let bufferDurationSeconds = 0.125;
11 <script src="../../resources/testharness.js"></script> 24 let numberOfNotes = 11;
12 <script src="../../resources/testharnessreport.js"></script> 25 let noteSpacing = bufferDurationSeconds +
13 <script src="../resources/audit-util.js"></script> 26 0.020; // leave 20ms of silence between each "note"
14 <script src="../resources/audit.js"></script> 27 let lengthInSeconds = numberOfNotes * noteSpacing;
15 <script src="../resources/buffer-loader.js"></script>
16 </head>
17 <body>
18 28
19 <script> 29 let context = 0;
20 let audit = Audit.createTaskRunner(); 30 let sinWaveBuffer = 0;
31 let reference = 0;
21 32
22 let sampleRate = 44100.0; 33 function createSinWaveBuffer(lengthInSeconds, frequency) {
23 let bufferDurationSeconds = 0.125; 34 let audioBuffer =
24 let numberOfNotes = 11; 35 context.createBuffer(2, lengthInSeconds * sampleRate, sampleRate);
25 let noteSpacing =
26 bufferDurationSeconds + 0.020; // leave 20ms of silence between each "note"
27 let lengthInSeconds = numberOfNotes * noteSpacing;
28 36
29 let context = 0; 37 let n = audioBuffer.length;
30 let sinWaveBuffer = 0; 38 let channelL = audioBuffer.getChannelData(0);
31 let reference = 0; 39 let channelR = audioBuffer.getChannelData(1);
32 40
33 function createSinWaveBuffer(lengthInSeconds, frequency) { 41 for (let i = 0; i < n; ++i) {
34 let audioBuffer = 42 channelL[i] = Math.sin(frequency * 2.0 * Math.PI * i / sampleRate);
35 context.createBuffer(2, lengthInSeconds * sampleRate, sampleRate); 43 channelR[i] = channelL[i];
44 }
36 45
37 let n = audioBuffer.length; 46 return audioBuffer;
38 let channelL = audioBuffer.getChannelData(0); 47 }
39 let channelR = audioBuffer.getChannelData(1);
40 48
41 for (let i = 0; i < n; ++i) { 49 function playNote(time, gain) {
42 channelL[i] = Math.sin(frequency * 2.0 * Math.PI * i / sampleRate); 50 let source = context.createBufferSource();
43 channelR[i] = channelL[i]; 51 source.buffer = sinWaveBuffer;
44 }
45 52
46 return audioBuffer; 53 let gainNode = context.createGain();
47 } 54 gainNode.gain.value = gain;
48 55
49 function playNote(time, gain) { 56 source.connect(gainNode);
50 let source = context.createBufferSource(); 57 gainNode.connect(context.destination);
51 source.buffer = sinWaveBuffer;
52 58
53 let gainNode = context.createGain(); 59 source.start(time);
54 gainNode.gain.value = gain; 60 }
55 61
56 source.connect(gainNode); 62 audit.define(
57 gainNode.connect(context.destination); 63 {label: 'create context', description: 'Create context for test'},
64 function(task, should) {
65 // Create offline audio context.
66 context = new OfflineAudioContext(
67 2, sampleRate * lengthInSeconds, sampleRate);
68 task.done();
69 });
58 70
59 source.start(time); 71 audit.define(
60 } 72 {label: 'load-ref', description: 'Load reference audio file'},
73 function(task, should) {
74 let bufferLoader =
75 new BufferLoader(context, ['gain-expected.wav'], bufferList => {
76 reference = bufferList[0].getChannelData(0);
77 task.done();
78 });
61 79
62 audit.define({ 80 bufferLoader.load();
63 label: 'create context', 81 });
64 description: 'Create context for test'
65 }, function(task, should) {
66 // Create offline audio context.
67 context =
68 new OfflineAudioContext(2, sampleRate * lengthInSeconds, sampleRate);
69 task.done();
70 });
71 82
72 audit.define({ 83 audit.define(
73 label: 'load-ref', 84 {label: 'test', description: 'GainNode functionality'},
74 description: 'Load reference audio file' 85 function(task, should) {
75 }, function(task, should) {
76 let bufferLoader =
77 new BufferLoader(context, ['gain-expected.wav'], bufferList => {
78 reference = bufferList[0].getChannelData(0);
79 task.done();
80 });
81 86
82 bufferLoader.load(); 87 // Create a buffer for a short "note".
83 }); 88 sinWaveBuffer = createSinWaveBuffer(bufferDurationSeconds, 880.0);
84 89
85 audit.define({ 90 // Render 11 notes, starting at a gain of 1.0, decreasing in gain by
86 label: 'test', 91 // 0.1. The last note will be of gain 0.0, so shouldn't be
87 description: 'GainNode functionality' 92 // perceptible in the rendered output.
88 }, function(task, should) { 93 for (let i = 0; i < numberOfNotes; ++i) {
94 let time = i * noteSpacing;
95 let gain = 1.0 - i / (numberOfNotes - 1);
96 playNote(time, gain);
97 }
89 98
90 // Create a buffer for a short "note". 99 context.startRendering()
91 sinWaveBuffer = createSinWaveBuffer(bufferDurationSeconds, 880.0); 100 .then(buffer => {
101 let actual = buffer.getChannelData(0);
102 should(actual, 'Output from gain node')
103 .beCloseToArray(
104 reference, {absoluteThreshold: 3.0503e-5});
105 let snr = 10 * Math.log10(computeSNR(actual, reference));
106 should(snr, 'SNR (in dB)').beGreaterThanOrEqualTo(89.088);
107 let filename = 'gain-actual.wav';
108 if (downloadAudioBuffer(buffer, filename))
109 should(true, 'Saved reference file').message(filename, '');
110 })
111 .then(() => task.done());
112 ;
113 });
92 114
93 // Render 11 notes, starting at a gain of 1.0, decreasing in gain by 0.1. 115 audit.run();
94 // The last note will be of gain 0.0, so shouldn't be perceptible in the 116 </script>
95 // rendered output. 117 </body>
96 for (let i = 0; i < numberOfNotes; ++i) {
97 let time = i * noteSpacing;
98 let gain = 1.0 - i / (numberOfNotes - 1);
99 playNote(time, gain);
100 }
101
102 context.startRendering()
103 .then(buffer => {
104 let actual = buffer.getChannelData(0);
105 should(actual, 'Output from gain node').beCloseToArray(reference, {
106 absoluteThreshold: 3.0503e-5
107 });
108 let snr = 10 * Math.log10(computeSNR(actual, reference));
109 should(snr, 'SNR (in dB)').beGreaterThanOrEqualTo(89.088);
110 let filename = 'gain-actual.wav';
111 if (downloadAudioBuffer(buffer, filename))
112 should(true, 'Saved reference file').message(filename, "");
113 })
114 .then(() => task.done());
115 ;
116 });
117
118 audit.run();
119 </script>
120
121 </body>
122 </html> 118 </html>
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« no previous file with comments | « third_party/WebKit/LayoutTests/webaudio/DynamicsCompressor/dynamicscompressor-simple.html ('k') | third_party/WebKit/LayoutTests/webaudio/Gain/gain-basic.html » ('j') | third_party/WebKit/LayoutTests/webaudio/tools/layout-test-tidy.js » ('J')

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