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comparison: content/media/webaudio/test/test_delayNodeTailWithReconnect.html
content/media/webaudio/test/test_delayNodeTailWithReconnect.html
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
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| -1:000000000000 | 0:011b59259cf1 |
|---|---|
| 1 <!DOCTYPE HTML> | |
| 2 <html> | |
| 3 <head> | |
| 4 <title>Test tail time lifetime of DelayNode after input finishes and new input added</title> | |
| 5 <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> | |
| 6 <script type="text/javascript" src="webaudio.js"></script> | |
| 7 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> | |
| 8 </head> | |
| 9 <body> | |
| 10 <pre id="test"> | |
| 11 <script class="testbody" type="text/javascript"> | |
| 12 | |
| 13 SimpleTest.waitForExplicitFinish(); | |
| 14 | |
| 15 // The buffer source will start on a block boundary, so keeping the signal | |
| 16 // within one block ensures that it will not cross AudioProcessingEvent buffer | |
| 17 // boundaries. | |
| 18 const signalLength = 128; | |
| 19 const bufferSize = 1024; | |
| 20 // Delay should be long enough to allow CC to run | |
| 21 var delayBufferCount = 50; | |
| 22 var delayBufferOffset; | |
| 23 const delayLength = delayBufferCount * bufferSize; | |
| 24 | |
| 25 var phase = "initial"; | |
| 26 var sourceCount = 0; | |
| 27 var delayCount = 0; | |
| 28 var oscillator; | |
| 29 var delay; | |
| 30 var source; | |
| 31 | |
| 32 function applySignal(buffer, offset) { | |
| 33 for (var i = 0; i < signalLength; ++i) { | |
| 34 buffer.getChannelData(0)[offset + i] = Math.cos(Math.PI * i / signalLength); | |
| 35 } | |
| 36 } | |
| 37 | |
| 38 function bufferIsSilent(buffer, out) { | |
| 39 for (var i = 0; i < buffer.length; ++i) { | |
| 40 if (buffer.getChannelData(0)[i] != 0) { | |
| 41 if (out) { | |
| 42 out.soundOffset = i; | |
| 43 } | |
| 44 return false; | |
| 45 } | |
| 46 } | |
| 47 return true; | |
| 48 } | |
| 49 | |
| 50 function onDelayOutput(e) { | |
| 51 switch(phase) { | |
| 52 | |
| 53 case "initial": | |
| 54 // Wait for oscillator sound to exit delay | |
| 55 if (bufferIsSilent(e.inputBuffer)) | |
| 56 break; | |
| 57 | |
| 58 phase = "played oscillator"; | |
| 59 break; | |
| 60 | |
| 61 case "played oscillator": | |
| 62 // First tail time has expired. Start second source and remove references | |
| 63 // to the delay and connected second source. | |
| 64 oscillator.disconnect(); | |
| 65 source.connect(delay); | |
| 66 source.start(); | |
| 67 source = null; | |
| 68 delay = null; | |
| 69 phase = "started second source"; | |
| 70 break; | |
| 71 | |
| 72 case "second tail time": | |
| 73 if (delayCount == delayBufferCount) { | |
| 74 var ctx = e.target.context; | |
| 75 var expected = ctx.createBuffer(1, bufferSize, ctx.sampleRate); | |
| 76 applySignal(expected, delayBufferOffset); | |
| 77 compareBuffers(e.inputBuffer, expected); | |
| 78 e.target.onaudioprocess = null; | |
| 79 SimpleTest.finish(); | |
| 80 } | |
| 81 } | |
| 82 | |
| 83 delayCount++; | |
| 84 } | |
| 85 | |
| 86 function onSourceOutput(e) { | |
| 87 switch(phase) { | |
| 88 case "started second source": | |
| 89 var out = {}; | |
| 90 if (!bufferIsSilent(e.inputBuffer, out)) { | |
| 91 delayBufferCount += sourceCount; | |
| 92 delayBufferOffset = out.soundOffset; | |
| 93 phase = "played second source"; | |
| 94 } | |
| 95 break; | |
| 96 case "played second source": | |
| 97 SpecialPowers.forceGC(); | |
| 98 SpecialPowers.forceCC(); | |
| 99 phase = "second tail time"; | |
| 100 e.target.onaudioprocess = null; | |
| 101 } | |
| 102 | |
| 103 sourceCount++; | |
| 104 } | |
| 105 | |
| 106 function startTest() { | |
| 107 var ctx = new AudioContext(); | |
| 108 var delayDuration = delayLength / ctx.sampleRate; | |
| 109 delay = ctx.createDelay(delayDuration); | |
| 110 delay.delayTime.value = delayDuration; | |
| 111 var processor1 = ctx.createScriptProcessor(bufferSize, 1, 0); | |
| 112 delay.connect(processor1); | |
| 113 processor1.onaudioprocess = onDelayOutput; | |
| 114 processor1.connect(ctx.destination); // work around bug 916387 | |
| 115 | |
| 116 // Signal to trigger initial tail time reference | |
| 117 oscillator = ctx.createOscillator(); | |
| 118 oscillator.start(0); | |
| 119 oscillator.stop(100/ctx.sampleRate); | |
| 120 oscillator.connect(delay); | |
| 121 | |
| 122 // Short signal, not started yet, with a ScriptProcessor to detect when it | |
| 123 // starts. It should finish before garbage collection. | |
| 124 var buffer = ctx.createBuffer(1, signalLength, ctx.sampleRate); | |
| 125 applySignal(buffer, 0); | |
| 126 source = ctx.createBufferSource(); | |
| 127 source.buffer = buffer; | |
| 128 var processor2 = ctx.createScriptProcessor(bufferSize, 1, 0); | |
| 129 source.connect(processor2); | |
| 130 processor2.onaudioprocess = onSourceOutput; | |
| 131 processor2.connect(ctx.destination); // guard against bug 916387 | |
| 132 }; | |
| 133 | |
| 134 startTest(); | |
| 135 </script> | |
| 136 </pre> | |
| 137 </body> | |
| 138 </html> |
