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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 <html> 2 <html>
3 <head> 3 <head>
4 <title>AudioBufferSourceNode - playbackRate test</title> 4 <title>
5 <script src="../../resources/testharness.js"></script> 5 AudioBufferSourceNode - playbackRate test
6 <script src="../../resources/testharnessreport.js"></script> 6 </title>
7 <script src="../resources/audit-util.js"></script> 7 <script src="../../resources/testharness.js"></script>
8 <script src="../resources/audit.js"></script> 8 <script src="../../resources/testharnessreport.js"></script>
9 </head> 9 <script src="../resources/audit-util.js"></script>
10 <body> 10 <script src="../resources/audit.js"></script>
11 <script> 11 </head>
12 let audit = Audit.createTaskRunner(); 12 <body>
13 <script id="layout-test-code">
14 let audit = Audit.createTaskRunner();
13 15
14 // Any sample rate mutiple of 128 is valid for this test, but here it uses 16 // Any sample rate mutiple of 128 is valid for this test, but here it uses
15 // 48000Hz because it is a commonly used number that happens to be multiple 17 // 48000Hz because it is a commonly used number that happens to be
16 // of 128. 18 // multiple of 128.
17 let sampleRate = 48000; 19 let sampleRate = 48000;
18 20
19 // The test iterates over 60 pitches starting from 36. (MIDI pitch of C2) 21 // The test iterates over 60 pitches starting from 36. (MIDI pitch of C2)
20 let fundamentalPitch = 36; 22 let fundamentalPitch = 36;
21 let numberOfPitches = 60; 23 let numberOfPitches = 60;
22 24
23 let noteDuration = 0.025; 25 let noteDuration = 0.025;
24 let totalDuration = noteDuration * numberOfPitches; 26 let totalDuration = noteDuration * numberOfPitches;
25 27
26 // Test constraints for each octave. 28 // Test constraints for each octave.
27 let testConstraints = [{ 29 let testConstraints = [
28 thresholdSNR: 103.8508, 30 {thresholdSNR: 103.8508, thresholdDiffULP: 0.3028},
29 thresholdDiffULP: 0.3028 31 {thresholdSNR: 103.8657, thresholdDiffULP: 0.3029},
30 }, { 32 {thresholdSNR: 103.8141, thresholdDiffULP: 0.3047},
31 thresholdSNR: 103.8657, 33 {thresholdSNR: 103.6818, thresholdDiffULP: 0.3262},
32 thresholdDiffULP: 0.3029 34 {thresholdSNR: 103.1514, thresholdDiffULP: 0.3946}
33 }, { 35 ];
34 thresholdSNR: 103.8141,
35 thresholdDiffULP: 0.3047
36 }, {
37 thresholdSNR: 103.6818,
38 thresholdDiffULP: 0.3262
39 }, {
40 thresholdSNR: 103.1514,
41 thresholdDiffULP: 0.3946
42 }];
43 36
44 function pitchToFrequency(midiPitch) { 37 function pitchToFrequency(midiPitch) {
45 return 440 * Math.pow(2, (Math.floor(midiPitch) - 69) / 12); 38 return 440 * Math.pow(2, (Math.floor(midiPitch) - 69) / 12);
46 } 39 }
47 40
48 function pitchDiffToPlaybackRate(midiPitchDiff) { 41 function pitchDiffToPlaybackRate(midiPitchDiff) {
49 return Math.pow(2, midiPitchDiff / 12); 42 return Math.pow(2, midiPitchDiff / 12);
50 } 43 }
51 44
52 function createSineWaveBuffer(context, frequency, duration) { 45 function createSineWaveBuffer(context, frequency, duration) {
53 let buffer = context.createBuffer(1, duration * sampleRate, sampleRate); 46 let buffer = context.createBuffer(1, duration * sampleRate, sampleRate);
54 let data = buffer.getChannelData(0); 47 let data = buffer.getChannelData(0);
55 let omega = 2 * Math.PI * frequency / sampleRate; 48 let omega = 2 * Math.PI * frequency / sampleRate;
56 for (let i = 0; i < data.length; i++) 49 for (let i = 0; i < data.length; i++)
57 data[i] = Math.sin(omega * i); 50 data[i] = Math.sin(omega * i);
58 51
59 return buffer; 52 return buffer;
60 } 53 }
61 54
62 // This is the fundamental buffer for playbackRate modulation. The duration 55 // This is the fundamental buffer for playbackRate modulation. The
63 // of this buffer is arbitrary but long enough to produce the sound without 56 // duration of this buffer is arbitrary but long enough to produce the
64 // running short. 57 // sound without running short.
65 let fundamentalBuffer; 58 let fundamentalBuffer;
66 59
67 // A unit test consists of 2 sources: the 'actual' source runs a buffer with 60 // A unit test consists of 2 sources: the 'actual' source runs a buffer
68 // the playback rate modulated and the 'expected' source runs a 61 // with the playback rate modulated and the 'expected' source runs a
69 // mathmatically generated sound buffer. 62 // mathmatically generated sound buffer.
70 function runUnitTest(context, noteStart, notePitch) { 63 function runUnitTest(context, noteStart, notePitch) {
71 let actualSrc = context.createBufferSource(); 64 let actualSrc = context.createBufferSource();
72 let expectedSrc = context.createBufferSource(); 65 let expectedSrc = context.createBufferSource();
73 let merger = context.createChannelMerger(2); 66 let merger = context.createChannelMerger(2);
74 67
75 actualSrc.buffer = fundamentalBuffer; 68 actualSrc.buffer = fundamentalBuffer;
76 expectedSrc.buffer = createSineWaveBuffer(context, 69 expectedSrc.buffer = createSineWaveBuffer(
77 pitchToFrequency(notePitch), noteDuration); 70 context, pitchToFrequency(notePitch), noteDuration);
78 actualSrc.playbackRate.value = 71 actualSrc.playbackRate.value =
79 pitchDiffToPlaybackRate(notePitch - fundamentalPitch); 72 pitchDiffToPlaybackRate(notePitch - fundamentalPitch);
80 73
81 actualSrc.connect(merger, 0, 0); 74 actualSrc.connect(merger, 0, 0);
82 expectedSrc.connect(merger, 0, 1); 75 expectedSrc.connect(merger, 0, 1);
83 merger.connect(context.destination); 76 merger.connect(context.destination);
84 77
85 actualSrc.start(noteStart); 78 actualSrc.start(noteStart);
86 actualSrc.stop(noteStart + noteDuration); 79 actualSrc.stop(noteStart + noteDuration);
87 expectedSrc.start(noteStart); 80 expectedSrc.start(noteStart);
88 expectedSrc.stop(noteStart + noteDuration); 81 expectedSrc.stop(noteStart + noteDuration);
89 } 82 }
90 83
91 84
92 // Test if AudioBufferSourceNode.playbackRate can playback at different rates 85 // Test if AudioBufferSourceNode.playbackRate can playback at different
93 // properly. 86 // rates properly.
94 audit.define("playbackrate-test", (task, should) => { 87 audit.define('playbackrate-test', (task, should) => {
95 let context = new OfflineAudioContext(2, totalDuration * 88 let context =
96 sampleRate, 89 new OfflineAudioContext(2, totalDuration * sampleRate, sampleRate);
97 sampleRate); 90 fundamentalBuffer = createSineWaveBuffer(
98 fundamentalBuffer = createSineWaveBuffer(context, 91 context, pitchToFrequency(fundamentalPitch), totalDuration);
99 pitchToFrequency(fundamentalPitch), totalDuration);
100 92
101 // Schedule tests up to 60 pitches above from the fundamental pitch. 93 // Schedule tests up to 60 pitches above from the fundamental pitch.
102 for (let iteration = 0; iteration < numberOfPitches; iteration++) 94 for (let iteration = 0; iteration < numberOfPitches; iteration++)
103 runUnitTest(context, noteDuration * iteration, fundamentalPitch + 95 runUnitTest(
104 iteration); 96 context, noteDuration * iteration, fundamentalPitch + iteration);
105 97
106 // Once the rendering is complete, split the buffer into 5 octaves. Then 98 // Once the rendering is complete, split the buffer into 5 octaves. Then
107 // perform the SNR and the maximum difference ULP check for each octave 99 // perform the SNR and the maximum difference ULP check for each octave
108 // with different constraints. 100 // with different constraints.
109 context.startRendering() 101 context.startRendering()
110 .then(function (renderedBuffer) { 102 .then(function(renderedBuffer) {
111 let actual = renderedBuffer.getChannelData(0); 103 let actual = renderedBuffer.getChannelData(0);
112 let expected = renderedBuffer.getChannelData(1); 104 let expected = renderedBuffer.getChannelData(1);
113 let octaveLength = Math.floor(noteDuration * 12 * sampleRate); 105 let octaveLength = Math.floor(noteDuration * 12 * sampleRate);
114 106
115 for (let i = 0; i < numberOfPitches / 12; i++) { 107 for (let i = 0; i < numberOfPitches / 12; i++) {
116 let start = i * octaveLength; 108 let start = i * octaveLength;
117 let end = (i + 1) * octaveLength; 109 let end = (i + 1) * octaveLength;
118 let octaveActual = actual.subarray(start, end); 110 let octaveActual = actual.subarray(start, end);
119 let octaveExpected = expected.subarray(start, end); 111 let octaveExpected = expected.subarray(start, end);
120 112
121 compareBuffersWithConstraints(should, octaveActual, octaveExpected, 113 compareBuffersWithConstraints(
122 { 114 should, octaveActual, octaveExpected, {
123 prefix: i, 115 prefix: i,
124 thresholdSNR: testConstraints[i].thresholdSNR, 116 thresholdSNR: testConstraints[i].thresholdSNR,
125 thresholdDiffULP: testConstraints[i].thresholdDiffULP 117 thresholdDiffULP: testConstraints[i].thresholdDiffULP
126 }); 118 });
127 } 119 }
128 120
129 }) 121 })
130 .then(() => task.done()); 122 .then(() => task.done());
131 }); 123 });
132 124
133 audit.run(); 125 audit.run();
134 </script> 126 </script>
135 </body> 127 </body>
136 </html> 128 </html>
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