third_party/WebKit/LayoutTests/webaudio/realtimeanalyser-multiple-calls.html - Issue 2581463002: Refactor WebAudio test directory

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Issue 2581463002: Refactor WebAudio test directory (Closed)

Patch Set: Use correct path for wav result files Created 3 years, 12 months ago

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1 <!doctype html>

2 <html>

3 <head>

4 <script src="../resources/js-test.js"></script>

5 <script src="resources/compatibility.js"></script>

6 <script src="resources/audit-util.js"></script>

7 <script src="resources/audio-testing.js"></script>

8 <title>Test Multiple Calls to getFloatFrequencyData</title>

9 </head>

10

11 <body>

12 <script>

13 description("Test AnalyserNode getFloatFrequencyData and getByteFrequencyD ata");

14 window.jsTestIsAsync = true;

15

16 var sampleRate = 48000;

17 // Render enough data to run the test.

18 var renderFrames = 2*1024;

19 var renderDuration = renderFrames / sampleRate;

20

21 var audit = Audit.createTaskRunner();

22

23 audit.defineTask("test", function (done) {

24

25 var context = new OfflineAudioContext(1, renderFrames, sampleRate);

26

27 // Use sawtooth oscillator as the source because it has quite a bit of h armonic content.

28 // Otherwise, the type doesn't really matter.

29 var osc = context.createOscillator();

30 osc.type = "sawtooth";

31

32 // Create an analyser with 256-point FFT. The FFT size doesn't really m atter much.

33 var analyser = context.createAnalyser();

34 analyser.fftSize = 256;

35

36 osc.connect(analyser);

37 analyser.connect(context.destination);

38

39 var success = true;

40

41 // Suspend after getting a full analyser frame. (Not really necessary, b ut it's nice that

42 // the frame doesn't include any initial zeroes.

43 var suspendFrame = analyser.fftSize;

44 context.suspend(suspendFrame / sampleRate).then(function () {

45 // Test successive calls to getFloatFrequencyData in the same renderin g quantum.

46 var f1 = new Float32Array(analyser.frequencyBinCount);

47 var f2 = new Float32Array(analyser.frequencyBinCount);

48

49 analyser.getFloatFrequencyData(f1);

50 analyser.getFloatFrequencyData(f2);

51

52 success = Should("Second call to getFloatFrequencyData", f2, {

53 precision: 5

54 }).beEqualToArray(f1) && success;

55 }).then(context.resume.bind(context));

56

57 suspendFrame += 128;

58 context.suspend(suspendFrame / sampleRate).then(function () {

59 // Test successive calls to getByteFrequencyData in the same rendering quantum.

60 var f1 = new Uint8Array(analyser.frequencyBinCount);

61 var f2 = new Uint8Array(analyser.frequencyBinCount);

62

63 analyser.getByteFrequencyData(f1);

64 analyser.getByteFrequencyData(f2);

65

66 success = Should("Second call to getByteFrequencyData", f2)

67 .beEqualToArray(f1) && success;

68 }).then(context.resume.bind(context));

69

70 suspendFrame += 128;

71 context.suspend(suspendFrame / sampleRate).then(function () {

72 // Test calls to getFloatFrequencyData followed by getByteFrequencyDat a. The float data,

73 // when converted to byte values should be identical to the result fro m

74 // getByteFrequencyData.

75 var f1 = new Float32Array(analyser.frequencyBinCount);

76 var f2 = new Uint8Array(analyser.frequencyBinCount);

77

78 analyser.getFloatFrequencyData(f1);

79 analyser.getByteFrequencyData(f2);

80

81 var byteValuesFromFloat = convertFloatToByte(f1, analyser.minDecibels, analyser.maxDecibels);

82 success = Should("Output of getByteFrequencyData after getFloatFrequen cyData",

83 byteValuesFromFloat)

84 .beEqualToArray(f2) && success;

85 }).then(context.resume.bind(context));

86

87 suspendFrame += 128;

88 context.suspend(suspendFrame / sampleRate).then(function () {

89 // Test calls to getByteFrequencyData followed by getFloatFrequencyDat a. The float data,

90 // when converted to byte values should be identical to the result fro m

91 // getByteFrequencyData.

92 var f1 = new Uint8Array(analyser.frequencyBinCount);

93 var f2 = new Float32Array(analyser.frequencyBinCount);

94

95 analyser.getByteFrequencyData(f1);

96 analyser.getFloatFrequencyData(f2);

97

98 var byteValuesFromFloat = convertFloatToByte(f2, analyser.minDecibels, analyser.maxDecibels);

99 success = Should(

100 "Output of getFloatFrequenycData (converted to byte) after getByte FrequencyData",

101 f1)

102 .beEqualToArray(byteValuesFromFloat) && success;

103 }).then(context.resume.bind(context));

104

105 osc.start();

106 context.startRendering().then(done);

107 });

108

109 audit.defineTask("finish", function (done) {

110 finishJSTest();

111 done();

112 });

113

114 audit.runTasks();

115

116 // Convert the float frequency data (in dB), \|floatFreqData\|, to byte valu es using the dB

117 // limits \|minDecibels\| and \|maxDecibels\|. The new byte array is returned .

118 function convertFloatToByte(floatFreqData, minDecibels, maxDecibels) {

119 var scale = 255 / (maxDecibels - minDecibels);

120

121 return floatFreqData.map(function (x) {

122 var value = Math.floor(scale * (x - minDecibels));

123 return Math.min(255, Math.max(0, value));

124 });

125 }

126 </script>

127 </body>

128 </html>

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