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1 <!DOCTYPE html> | 1 <!DOCTYPE html> |
2 | 2 |
3 <!-- | 3 <!-- |
4 Create an oscillator of type SQUARE and generate a slow exponential tone sweep. | 4 Create an oscillator of type SQUARE and generate a slow exponential tone sweep. |
5 The result can be checked for the correct wave shape and for aliasing artifacts. | 5 The result can be checked for the correct wave shape and for aliasing artifacts. |
6 See oscillator-testing.js for details. | 6 See oscillator-testing.js for details. |
7 --> | 7 --> |
8 | 8 |
9 <html> | 9 <html> |
10 <head> | 10 <head> |
11 <script type="text/javascript" src="resources/audio-testing.js"></script> | 11 <script type="text/javascript" src="resources/audio-testing.js"></script> |
12 <script type="text/javascript" src="resources/oscillator-testing.js"></script> | 12 <script type="text/javascript" src="resources/oscillator-testing.js"></script> |
13 </head> | 13 </head> |
14 <body> | 14 <body> |
15 | 15 |
16 <script> | 16 <script> |
17 | 17 |
18 window.onload = init; | 18 window.onload = init; |
19 | 19 |
20 function init() { | 20 function init() { |
21 if (!window.testRunner) | 21 if (!window.testRunner) |
22 return; | 22 return; |
23 | 23 |
24 generateExponentialOscillatorSweep("square"); | 24 // Create offline audio context. |
| 25 context = new OfflineAudioContext(1, sampleRate * lengthInSeconds, sampleRat
e); |
| 26 generateExponentialOscillatorSweep(context, "square"); |
| 27 |
| 28 context.oncomplete = finishAudioTest; |
| 29 context.startRendering(); |
| 30 |
| 31 testRunner.waitUntilDone(); |
25 } | 32 } |
26 | 33 |
27 </script> | 34 </script> |
28 | 35 |
29 </body> | 36 </body> |
30 </html> | 37 </html> |
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