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Issue 2707433003: Convert mixing.html test to testharness. (Closed)
Patch Set: Address review comments. Created 3 years, 9 months ago
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1 <!DOCTYPE html> 1 <!DOCTYPE html>
2 2
3 <!-- 3 <!--
4 Create two sources and play them simultaneously. This tests unity-gain summing of AudioNode inputs. 4 Create two sources and play them simultaneously. This tests unity-gain summing of AudioNode inputs.
5 The result should be some laughing playing at the same time as the drumming. 5 The result should be some laughing playing at the same time as the drumming.
6 --> 6 -->
7 7
8 <html> 8 <html>
9 <head> 9 <head>
10 <script src="../resources/testharness.js"></script>
11 <script src="../resources/testharnessreport.js"></script>
10 <script src="resources/audit-util.js"></script> 12 <script src="resources/audit-util.js"></script>
11 <script src="resources/audio-testing.js"></script> 13 <script src="resources/audit.js"></script>
12 <script type="text/javascript" src="resources/buffer-loader.js"></script>
13
14 </head> 14 </head>
15 <body> 15 <body>
16 16
17 <script> 17 <script>
18 let audit = Audit.createTaskRunner();
18 19
19 window.onload = init; 20 let sampleRate = 44100.0;
21 let lengthInSeconds = 2;
20 22
21 var sampleRate = 44100.0; 23 audit.define('test', (task, should) => {
22 var lengthInSeconds = 2; 24 // Create offline audio context.
25 let context =
26 new OfflineAudioContext(2, sampleRate * lengthInSeconds, sampleRate);
23 27
24 var context = 0; 28 // Load up audio files and test
25 var bufferLoader = 0; 29 Promise
30 .all([
31 // This file is stereo
32 Audit.loadFileFromUrl('resources/hyper-reality/br-jam-loop.wav')
33 .then(response => { return context.decodeAudioData(response); }),
34 // This file is mono
35 Audit.loadFileFromUrl('resources/hyper-reality/laughter.wav')
36 .then(response => { return context.decodeAudioData(response); }),
37 ])
38 .then(audioBuffers => {
39 // Thresholds are experimentally determined
40 return runTest(context, audioBuffers, should, [
41 {snrThreshold: Infinity, errorThreshold: 0},
42 {snrThreshold: Infinity, errorThreshold: 0}
43 ]);
44 })
45 .then(() => task.done());
46 });
26 47
27 function init() { 48 audit.run();
28 if (!window.testRunner)
29 return;
30
31 // Create offline audio context.
32 context = new OfflineAudioContext(2, sampleRate * lengthInSeconds, sampleRat e);
33
34 bufferLoader = new BufferLoader(
35 context,
36 [
37 "resources/hyper-reality/br-jam-loop.wav",
38 "resources/hyper-reality/laughter.wav",
39 ],
40 finishedLoading
41 );
42 49
43 bufferLoader.load(); 50 function runTest(context, bufferList, should, testThresholds) {
44 testRunner.waitUntilDone(); 51 should(bufferList.length, 'Number of decoded files').beEqualTo(2);
52
53 // Create two sources and play them at the same time.
54 let source1 = context.createBufferSource();
55 let source2 = context.createBufferSource();
56 source1.buffer = bufferList[0];
57 source2.buffer = bufferList[1];
58
59 source1.connect(context.destination);
60 source2.connect(context.destination);
61 source1.start(0);
62 source2.start(0);
63
64 // Verify the number of channels in each source and the expected result.
65 should(bufferList[0].numberOfChannels, 'Number of channels in stereo source')
66 .beEqualTo(2);
67
68 should(bufferList[1].numberOfChannels, 'Number of channels in mono source')
69 .beEqualTo(1);
70
71 return context.startRendering().then(verifyResult);
45 } 72 }
46 73
47 function finishedLoading(bufferList) { 74 function verifyResult(renderedBuffer) {
48 // Create two sources and play them at the same time. 75 // Test only works if we have a stereo result.
49 var source1 = context.createBufferSource(); 76 should(
50 var source2 = context.createBufferSource(); 77 renderedBuffer.numberOfChannels, 'Number of channels in rendered output')
51 source1.buffer = bufferList[0]; 78 .beEqualTo(2);
52 source2.buffer = bufferList[1]; 79
53 80 // Note: the source lengths may not match the context length. Create copies
54 source1.connect(context.destination); 81 // of the sources truncated or zero-filled to the rendering length.
55 source2.connect(context.destination); 82
56 source1.start(0); 83 let stereoSource = new AudioBuffer({
57 source2.start(0); 84 length: renderedBuffer.length,
58 85 numberOfChannels: 2,
59 context.oncomplete = finishAudioTest; 86 sampleRate: context.sampleRate
60 context.startRendering(); 87 });
88 stereoSource.copyToChannel(bufferList[0].getChannelData(0), 0);
89 stereoSource.copyToChannel(bufferList[0].getChannelData(1), 1);
90
91 let monoSource = new AudioBuffer({
92 length: renderedBuffer.length,
93 numberOfChannels: 1,
94 sampleRate: context.sampleRate
95 });
96 monoSource.copyToChannel(bufferList[1].getChannelData(0), 0);
97
98 // Compute the expected result buffer0 is stereo and buffer1 is mono. The
99 // result should be stereo, with the mono source implicitly upmixed to
100 // stereo to produce the expected result.
101 let expectedBuffer = new AudioBuffer({
102 length: renderedBuffer.length,
103 numberOfChannels: 2,
104 sampleRate: context.sampleRate
105 });
106
107 let monoData = monoSource.getChannelData(0);
108 for (let c = 0; c < expectedBuffer.numberOfChannels; ++c) {
109 let expectedData = expectedBuffer.getChannelData(c);
110 let stereoData = stereoSource.getChannelData(c);
111 for (let k = 0; k < expectedBuffer.length; ++k) {
112 expectedData[k] = stereoData[k] + monoData[k];
113 }
114 }
115
116 // Compare the rendered data with the expected data for each channel.
117 for (let k = 0; k < renderedBuffer.numberOfChannels; ++k) {
118 let actualData = renderedBuffer.getChannelData(k);
119 let expectedData = expectedBuffer.getChannelData(k);
120 let threshold = testThresholds[k];
121 let snr = 10 * Math.log10(computeSNR(actualData, expectedData));
122
123 should(snr, 'SNR for channel ' + k)
124 .beGreaterThanOrEqualTo(threshold.snrThreshold);
125 should(actualData, 'Rendered audio').beCloseToArray(expectedData, {
126 absoluteThreshold: threshold.errorThreshold
127 });
128 }
61 } 129 }
62
63 </script> 130 </script>
64 131
65 </body> 132 </body>
66 </html> 133 </html>
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