third_party/WebKit/LayoutTests/webaudio/AudioBufferSource/audiobuffersource-playbackrate-zero.html - Issue 2892803002: Fix layout tests to prevent errors from layout-test-tidy

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Issue 2892803002: Fix layout tests to prevent errors from layout-test-tidy (Closed)

Patch Set: Created 3 years, 7 months ago

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1 <!DOCTYPE html>	1 <!DOCTYPE html>

2 <html>	2 <html>

3	3

4 <head>	4 <head>

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

6 <script src="../../resources/testharnessreport.js"></script>	6 <script src="../../resources/testharnessreport.js"></script>

7 <script src="../resources/audit-util.js"></script>	7 <script src="../resources/audit-util.js"></script>

8 <script src="../resources/audit.js"></script>	8 <script src="../resources/audit.js"></script>

9 </head>	9 </head>

10	10

11 <body>	11 <body>

12 <script>	12 <script>

13	13

14 // Sample rate should be power of 128 to observe the change of AudioParam at	14 // Sample rate should be power of 128 to observe the change of AudioParam at

15 // the beginning of rendering quantum. (playbackRate is k-rate) This is the	15 // the beginning of rendering quantum. (playbackRate is k-rate) This is the

16 // minimum sample rate in the valid sample rate range.	16 // minimum sample rate in the valid sample rate range.

17 var sampleRate = 4096;	17 let sampleRate = 4096;

18	18

19 // The render duration in seconds, and the length in samples.	19 // The render duration in seconds, and the length in samples.

20 var renderDuration = 1.0;	20 let renderDuration = 1.0;

21 var renderLength = renderDuration * sampleRate;	21 let renderLength = renderDuration * sampleRate;

22	22

23 var context = new OfflineAudioContext(1, renderLength, sampleRate);	23 let context = new OfflineAudioContext(1, renderLength, sampleRate);

24 var audit = Audit.createTaskRunner();	24 let audit = Audit.createTaskRunner();

25	25

26	26

27 // Task: Render the actual buffer and compare with the reference.	27 // Task: Render the actual buffer and compare with the reference.

28 audit.define('synthesize-verify', (task, should) => {	28 audit.define('synthesize-verify', (task, should) => {

29 var ramp = context.createBufferSource();	29 let ramp = context.createBufferSource();

30 var rampBuffer = createLinearRampBuffer(context, renderLength);	30 let rampBuffer = createLinearRampBuffer(context, renderLength);

31 ramp.buffer = rampBuffer;	31 ramp.buffer = rampBuffer;

32	32

33 ramp.connect(context.destination);	33 ramp.connect(context.destination);

34 ramp.start();	34 ramp.start();

35	35

36 // Leave the playbackRate as 1 for the first half, then change it	36 // Leave the playbackRate as 1 for the first half, then change it

37 // to zero at the exact half. The zero playback rate should hold the	37 // to zero at the exact half. The zero playback rate should hold the

38 // sample value of the buffer index at the moment. (sample-and-hold)	38 // sample value of the buffer index at the moment. (sample-and-hold)

39 ramp.playbackRate.setValueAtTime(1.0, 0.0);	39 ramp.playbackRate.setValueAtTime(1.0, 0.0);

40 ramp.playbackRate.setValueAtTime(0.0, renderDuration / 2);	40 ramp.playbackRate.setValueAtTime(0.0, renderDuration / 2);

41	41

42 context.startRendering().then(function (renderedBuffer) {	42 context.startRendering().then(function (renderedBuffer) {

43 var data = renderedBuffer.getChannelData(0);	43 let data = renderedBuffer.getChannelData(0);

44 var rampData = rampBuffer.getChannelData(0);	44 let rampData = rampBuffer.getChannelData(0);

45 var half = rampData.length / 2;	45 let half = rampData.length / 2;

46 var passed = true;	46 let passed = true;

	47 let i;

47	48

48 for (var i = 1; i < rampData.length; i++) {	49 for (i = 1; i < rampData.length; i++) {

49 if (i < half) {	50 if (i < half) {

50 // Before the half position, the actual should match with the	51 // Before the half position, the actual should match with the

51 // original ramp data.	52 // original ramp data.

52 if (data[i] !== rampData[i]) {	53 if (data[i] !== rampData[i]) {

53 passed = false;	54 passed = false;

54 break;	55 break;

55 }	56 }

56 } else {	57 } else {

57 // From the half position, the actual value should not change.	58 // From the half position, the actual value should not change.

58 if (data[i] !== rampData[half]) {	59 if (data[i] !== rampData[half]) {

59 passed = false;	60 passed = false;

60 break;	61 break;

61 }	62 }

62 }	63 }

63 }	64 }

64	65

65 should(passed, 'The zero playbackRate')	66 should(passed, 'The zero playbackRate')

66 .message(	67 .message(

67 'held the sample value correctly',	68 'held the sample value correctly',

68 'should hold the sample value. ' + 'Expected ' + rampData[half] +	69 'should hold the sample value. ' + 'Expected ' + rampData[half] +

69 ' but got ' + data[i] + ' at the index ' + i);	70 ' but got ' + data[i] + ' at the index ' + i);

70 }).then(() => task.done());	71 }).then(() => task.done());

71 });	72 });

72	73

73 audit.run();	74 audit.run();

74 </script>	75 </script>

75 </body>	76 </body>

76	77

77 </html>	78 </html>

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