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content/media/webaudio/test/test_oscillatorNode2.html
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| 1 <!DOCTYPE HTML> | |
| 2 <html> | |
| 3 <head> | |
| 4 <title>Test OscillatorNode lifetime and sine phase</title> | |
| 5 <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> | |
| 6 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> | |
| 7 </head> | |
| 8 <body> | |
| 9 <pre id="test"> | |
| 10 <script src="webaudio.js" type="text/javascript"></script> | |
| 11 <script class="testbody" type="text/javascript"> | |
| 12 | |
| 13 const signalLength = 2048; | |
| 14 | |
| 15 function createOscillator(context) { | |
| 16 var osc = context.createOscillator(); | |
| 17 osc.start(0); | |
| 18 osc.stop(signalLength/context.sampleRate); | |
| 19 return osc; | |
| 20 } | |
| 21 | |
| 22 function connectUnreferencedOscillator(context, destination) { | |
| 23 var osc = createOscillator(context); | |
| 24 osc.connect(destination); | |
| 25 } | |
| 26 | |
| 27 var gTest = { | |
| 28 length: signalLength, | |
| 29 numberOfChannels: 1, | |
| 30 createGraph: function(context) { | |
| 31 var blend = context.createGain(); | |
| 32 | |
| 33 connectUnreferencedOscillator(context, blend); | |
| 34 // Test that the unreferenced oscillator remains alive until it has finished. | |
| 35 SpecialPowers.forceGC(); | |
| 36 SpecialPowers.forceCC(); | |
| 37 | |
| 38 // Create another sine wave oscillator in negative time, which should | |
| 39 // cancel when mixed with the unreferenced oscillator. | |
| 40 var oscillator = createOscillator(context); | |
| 41 oscillator.frequency.value = -440; | |
| 42 oscillator.connect(blend); | |
| 43 | |
| 44 return blend; | |
| 45 }, | |
| 46 }; | |
| 47 | |
| 48 runTest(); | |
| 49 | |
| 50 </script> | |
| 51 </pre> | |
| 52 </body> | |
| 53 </html> |
