third_party/WebKit/LayoutTests/webaudio/audioparam-setTargetAtTime-sampling.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 <script src="resources/audioparam-testing.js"></script>

9 <title>Test Sampling for SetTargetAtTime</title>

10 </head>

11

12 <body>

13 <script>

14 description("Test Sampling of SetTargetAtTime");

15

16 window.jsTestIsAsync = true;

17 // Some slow sample rate, but otherwise arbitrary.

18 var sampleRate = 12800;

19

20 // Time constant for setTargetValue. Make it short, but is otherwise arbit rary.

21 var timeConstant = 10 / sampleRate;

22

23 // Defaut initial gain for test. Arbitrary, but we want it large so the c hanges look large,

24 // even if the relative change isn't.

25 var initialGain = 10000;

26

27 var audit = Audit.createTaskRunner();

28

29 // Test sampling of setTargetAtTime that starts at \|startFrame\|. A gain n ode is used for

30 // testing. \|initializeGainFunction\| initializes the gain value.

31 function doTest(message, startFrame, threshold, initializeGainFunction) {

32 var context = new OfflineAudioContext(1, 256, sampleRate);

33 var source = context.createBufferSource();

34 var b = context.createBuffer(1, 1, sampleRate);

35 b.getChannelData(0)[0] = 1;

36 source.buffer = b;

37 source.loop = true;

38

39 var gain = context.createGain();

40 // Initialize the value of the gain node appropriately.

41 initializeGainFunction(gain);

42 gain.gain.setTargetAtTime(0, startFrame / sampleRate, timeConstant);

43

44 source.connect(gain);

45 gain.connect(context.destination);

46

47 source.start();

48

49 return context.startRendering().then(function (resultBuffer) {

50 // Verify that the sampling of the setTargetAtTime automation was done correctly. We just

51 // look at the sample just past the start of the automation.

52 var resultData = resultBuffer.getChannelData(0);

53 // Compute the true result at the frame just past startFrame and verif y that the actual

54 // rendered result is within \|threshold\| of the expected value.

55 var frame = Math.ceil(startFrame);

56 var v = 10000 * Math.exp(-(frame / sampleRate - startFrame / sampleRat e) / timeConstant);

57 Should(message + ": Target value at frame " + frame, resultData[frame] ).beCloseTo(v, threshold);

58 });

59 }

60

61 function initializeGainBySetter (g) {

62 g.gain.value = initialGain;

63 }

64

65 function initializeGainBySetValue (g) {

66 g.gain.setValueAtTime(initialGain, 0);

67 }

68

69 audit.defineTask("setValue;128.1", function (done) {

70 doTest("Initialize by setValueAtTime", 128.1, 3.6029e-8, initializeGainB ySetValue).then(done);

71 });

72

73 audit.defineTask("setValue;0.1", function (done) {

74 doTest("Initialize by setValueAtTime", 0.1, 3.6029e-8, initializeGainByS etValue).then(done);

75 });

76

77 audit.defineTask("setValue;0.0", function (done) {

78 doTest("Initialize by setValueAtTime", 0, 3.6029e-8, initializeGainBySet Value).then(done);

79 });

80

81 audit.defineTask("setter;128.1", function (done) {

82 doTest("Initialize by setter", 128.1, 3.6029e-8, initializeGainBySetter) .then(done);

83 });

84

85 audit.defineTask("setter;0.1", function (done) {

86 doTest("Initialize by setter", 0.1, 3.6029e-8, initializeGainBySetter).t hen(done);

87 });

88

89 audit.defineTask("setter;0.0", function (done) {

90 doTest("Initialize by setter", 0, 0, initializeGainBySetter).then(done);

91 });

92

93

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

95 finishJSTest();

96 done();

97 });

98

99 audit.runTasks();

100 successfullyParsed = true;

101 </script>

102 </body>

103 </html>

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