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| 1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> | |
| 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 AudioParam.setTargetAtTime</title> | |
| 10 </head> | |
| 11 | |
| 12 <body> | |
| 13 <div id="description"></div> | |
| 14 <div id="console"></div> | |
| 15 | |
| 16 <script> | |
| 17 description("Test AudioParam setTargetAtTime() functionality."); | |
| 18 | |
| 19 // Play a long DC signal out through an AudioGainNode, and call setValueAtTime()
and | |
| 20 // setTargetAtTime at regular intervals to set the starting value and the target | |
| 21 // value. Each time interval has a ramp with a different starting and target val
ue so that | |
| 22 // there is a discontinuity at each time interval boundary. The discontinuity i
s for testing | |
| 23 // timing. Also, we alternate between an increasing and decreasing ramp for eac
h interval. | |
| 24 | |
| 25 // Number of tests to run. | |
| 26 var numberOfTests = 100; | |
| 27 | |
| 28 // Max allowed difference between the rendered data and the expected result. | |
| 29 var maxAllowedError = 1.6953e-6; | |
| 30 | |
| 31 // The AudioGainNode starts with this value instead of the default value. | |
| 32 var initialValue = 100; | |
| 33 | |
| 34 // Set the gain node value to the specified value at the specified time. | |
| 35 function setValue(value, time) | |
| 36 { | |
| 37 gainNode.gain.setValueAtTime(value, time); | |
| 38 } | |
| 39 | |
| 40 // Generate an exponential approach starting at |startTime| with a target value
of |value|. | |
| 41 function automation(value, startTime, endTime) | |
| 42 { | |
| 43 // endTime is not used for setTargetAtTime. | |
| 44 gainNode.gain.setTargetAtTime(value, startTime, timeConstant) | |
| 45 } | |
| 46 | |
| 47 function runTest() | |
| 48 { | |
| 49 createAudioGraphAndTest(numberOfTests, | |
| 50 initialValue, | |
| 51 setValue, | |
| 52 automation, | |
| 53 "setTargetAtTime()", | |
| 54 maxAllowedError, | |
| 55 createExponentialApproachArray); | |
| 56 } | |
| 57 | |
| 58 runTest(); | |
| 59 successfullyParsed = true; | |
| 60 | |
| 61 </script> | |
| 62 | |
| 63 </body> | |
| 64 </html> | |
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Chromium Code Reviews
Issue 2581463002:
Refactor WebAudio test directory (Closed)
