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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>
5 Test Clamping of Automations
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 <title>Test Clamping of Automations</title>
9 </head> 11 </head>
10
11 <body> 12 <body>
12 <script> 13 <script id="layout-test-code">
13 14 // Some arbitrary sample rate for the offline context.
14 // Some arbitrary sample rate for the offline context. 15 let sampleRate = 48000;
15 var sampleRate = 48000;
16 16
17 // Duration of test (fairly arbitrary). 17 // Duration of test (fairly arbitrary).
18 var renderDuration = 1; 18 let renderDuration = 1;
19 var renderFrames = renderDuration * sampleRate; 19 let renderFrames = renderDuration * sampleRate;
20 20
21 var audit = Audit.createTaskRunner(); 21 let audit = Audit.createTaskRunner();
22 22
23 audit.define("clamp", (task, should) => { 23 audit.define('clamp', (task, should) => {
24 // Test clamping of automations. Most AudioParam limits are essentially 24 // Test clamping of automations. Most AudioParam limits are essentially
25 // unbounded, so clamping doesn't happen. For most other AudioParams, 25 // unbounded, so clamping doesn't happen. For most other AudioParams,
26 // the behavior is sufficiently complicated with complicated outputs 26 // the behavior is sufficiently complicated with complicated outputs
27 // that testing them is hard. However the output behavior of the 27 // that testing them is hard. However the output behavior of the
28 // frequency parameter for a BiquadFilter is relatively simple. Use 28 // frequency parameter for a BiquadFilter is relatively simple. Use
29 // that as the test. 29 // that as the test.
30 var context = new OfflineAudioContext(1, renderFrames, sampleRate); 30 let context = new OfflineAudioContext(1, renderFrames, sampleRate);
31 31
32 var source = context.createBufferSource(); 32 let source = context.createBufferSource();
33 source.buffer = createConstantBuffer(context, 1, 1); 33 source.buffer = createConstantBuffer(context, 1, 1);
34 source.loop = true; 34 source.loop = true;
35 35
36 var filter = context.createBiquadFilter(); 36 let filter = context.createBiquadFilter();
37 filter.type = "lowpass"; 37 filter.type = 'lowpass';
38 38
39 source.connect(filter); 39 source.connect(filter);
40 filter.connect(context.destination); 40 filter.connect(context.destination);
41 41
42 var V0 = 880; 42 let V0 = 880;
43 var T0 = 0; 43 let T0 = 0;
44 filter.frequency.setValueAtTime(V0, T0); 44 filter.frequency.setValueAtTime(V0, T0);
45 45
46 var V1 = -1000; 46 let V1 = -1000;
47 var T1 = renderDuration / 4; 47 let T1 = renderDuration / 4;
48 filter.frequency.linearRampToValueAtTime(V1, T1); 48 filter.frequency.linearRampToValueAtTime(V1, T1);
49 49
50 var V2 = 880; 50 let V2 = 880;
51 var T2 = renderDuration / 2; 51 let T2 = renderDuration / 2;
52 filter.frequency.linearRampToValueAtTime(V2, T2); 52 filter.frequency.linearRampToValueAtTime(V2, T2);
53 53
54 source.start(); 54 source.start();
55 55
56 context.startRendering().then(function (buffer) { 56 context.startRendering()
57 var result = buffer.getChannelData(0); 57 .then(function(buffer) {
58 let result = buffer.getChannelData(0);
58 59
59 // When the cutoff frequency of a lowpass filter is 0, nothing gets 60 // When the cutoff frequency of a lowpass filter is 0, nothing
60 // through. Hence the output of the filter between the clamping 61 // gets through. Hence the output of the filter between the
61 // period should be exactly zero. This tests passes if the output is 0 62 // clamping period should be exactly zero. This tests passes if
62 // during the expected range. 63 // the output is 0 during the expected range.
63 // 64 //
64 // Compute when the frequency value of the biquad goes to 0. In 65 // Compute when the frequency value of the biquad goes to 0. In
65 // general, t = (T0*V1 -T1*V0)/(V1-V0) (using the notation from the 66 // general, t = (T0*V1 -T1*V0)/(V1-V0) (using the notation from
66 // spec.) 67 // the spec.)
67 var clampStartTime = solveLinearRamp(0, V0, T0, V1, T1); 68 let clampStartTime = solveLinearRamp(0, V0, T0, V1, T1);
68 var clampEndTime = solveLinearRamp(0, V1, T1, V2, T2); 69 let clampEndTime = solveLinearRamp(0, V1, T1, V2, T2);
69 70
70 var clampStartFrame = Math.ceil(clampStartTime * sampleRate); 71 let clampStartFrame = Math.ceil(clampStartTime * sampleRate);
71 var clampEndFrame = Math.floor(clampEndTime * sampleRate); 72 let clampEndFrame = Math.floor(clampEndTime * sampleRate);
72 73
73 var clampedSignal = result.slice(clampStartFrame, clampEndFrame + 1); 74 let clampedSignal =
74 var expectedSignal = new Float32Array(clampedSignal.length); 75 result.slice(clampStartFrame, clampEndFrame + 1);
75 expectedSignal.fill(0); 76 let expectedSignal = new Float32Array(clampedSignal.length);
77 expectedSignal.fill(0);
76 78
77 // Output should be zero. 79 // Output should be zero.
78 should(clampedSignal, 80 should(
79 "Clamped signal in frame range [" + clampStartFrame + ", " + 81 clampedSignal,
80 clampEndFrame + "]") 82 'Clamped signal in frame range [' + clampStartFrame + ', ' +
81 .beCloseToArray(expectedSignal, 0); 83 clampEndFrame + ']')
84 .beCloseToArray(expectedSignal, 0);
82 85
83 // Find the actual clamp range based on the output values. 86 // Find the actual clamp range based on the output values.
84 var actualClampStart = result.findIndex(x => x === 0); 87 let actualClampStart = result.findIndex(x => x === 0);
85 var actualClampEnd = actualClampStart + result.slice(actualClampStart) .findIndex( 88 let actualClampEnd = actualClampStart +
86 x => x != 0); 89 result.slice(actualClampStart).findIndex(x => x != 0);
87 90
88 // Verify that the expected clamping range is a subset of the actual r ange. 91 // Verify that the expected clamping range is a subset of the
89 should(actualClampStart, "Actual Clamp start") 92 // actual range.
90 .beLessThanOrEqualTo(clampStartFrame); 93 should(actualClampStart, 'Actual Clamp start')
91 should(actualClampEnd, "Actual Clamp end") 94 .beLessThanOrEqualTo(clampStartFrame);
92 .beGreaterThanOrEqualTo(clampEndFrame); 95 should(actualClampEnd, 'Actual Clamp end')
96 .beGreaterThanOrEqualTo(clampEndFrame);
93 97
94 }).then(() => task.done()); 98 })
99 .then(() => task.done());
95 }); 100 });
96 101
97 audit.run(); 102 audit.run();
98 103
99 function solveLinearRamp(v, v0, t0, v1, t1) { 104 function solveLinearRamp(v, v0, t0, v1, t1) {
100 // Solve the linear ramp equation for the time t at which the ramp 105 // Solve the linear ramp equation for the time t at which the ramp
101 // reaches the value v. The linear ramp equation (from the spec) is 106 // reaches the value v. The linear ramp equation (from the spec) is
102 // 107 //
103 // v(t) = v0 + (v1 - v0) * (t - t0)/(t1 - t0) 108 // v(t) = v0 + (v1 - v0) * (t - t0)/(t1 - t0)
104 // 109 //
105 // Find t such that 110 // Find t such that
106 // 111 //
107 // v = v0 + (v1 - v0) * (t - t0)/(t1 - t0) 112 // v = v0 + (v1 - v0) * (t - t0)/(t1 - t0)
108 // 113 //
109 // Then 114 // Then
110 // 115 //
111 // t = (t0 * v1 - t1 * v0 + (t1 - t0) * v) / (v1 - v0) 116 // t = (t0 * v1 - t1 * v0 + (t1 - t0) * v) / (v1 - v0)
112 // 117 //
113 return (t0 * v1 - t1 * v0 + (t1 - t0) * v) / (v1 - v0); 118 return (t0 * v1 - t1 * v0 + (t1 - t0) * v) / (v1 - v0);
114 } 119 }
115 </script> 120 </script>
116 </body> 121 </body>
117 </html> 122 </html>
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