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| 1 <!doctype html> |
| 2 <html> |
| 3 <head> |
| 4 <title>Loop AudioBufferSourceNode, with buffer set after start</title> |
| 5 <script> |
| 6 var context = new AudioContext() || new webkitAudioContext(); |
| 7 var normalSource; |
| 8 var delayedSource |
| 9 var buffer; |
| 10 var request = new XMLHttpRequest(); |
| 11 request.open("GET", "../../LayoutTests/webaudio/resources/media/128kbps-44
khz.mp3", true); |
| 12 request.responseType = "arraybuffer"; |
| 13 request.onload = function() { |
| 14 context.decodeAudioData(request.response, |
| 15 function(b) { |
| 16 buffer = b; |
| 17 document.getElementById("Start").disabled = false; |
| 18 document.getElementById("StartDelayed").disabled = false; |
| 19 }, |
| 20 function () { |
| 21 alert("Could not load file"); |
| 22 }); |
| 23 }; |
| 24 request.send(); |
| 25 |
| 26 function normalStart() { |
| 27 console.log("normalStart"); |
| 28 normalSource = context.createBufferSource(); |
| 29 normalSource.loop = true; |
| 30 normalSource.buffer = buffer; |
| 31 normalSource.connect(context.destination); |
| 32 normalSource.start(context.currentTime + 2, 0); |
| 33 } |
| 34 function delayedStart() { |
| 35 console.log("delayedStart"); |
| 36 delayedSource = context.createBufferSource(); |
| 37 delayedSource.loop = true; |
| 38 delayedSource.connect(context.destination); |
| 39 delayedSource.start(context.currentTime + 2, 0); |
| 40 setTimeout(function () { |
| 41 delayedSource.buffer = buffer; |
| 42 }, 1000); |
| 43 } |
| 44 </script> |
| 45 </head> |
| 46 |
| 47 <body> |
| 48 <h1>Loop AudioBufferSourceNode, with buffer set after start</h1> |
| 49 |
| 50 <p>Test that looping an AudioBufferSource works correctly if the source is s
tarted and the |
| 51 buffer is assigned later, but before the source would start. This can't be
easily tested in an |
| 52 offline context because we can't precisely control when the assignment of th
e buffer to the |
| 53 source is done.</p> |
| 54 |
| 55 <p>Press the "Start" button for the normal case where the buffer is assigned
before start.</p> |
| 56 |
| 57 <p>Press the "Start delayed" button for the case where the source is started
and the buffer |
| 58 assigned later.</p> |
| 59 |
| 60 <p>You should hear audio about 2 sec after pressing the button. It should c
ontinue until you |
| 61 press the corresponding Stop button.</p> |
| 62 |
| 63 <button id="Start" disabled onclick='normalStart()'>Start</button> |
| 64 <button id="Stop" onclick="normalSource.stop()">Stop</button> |
| 65 <br> |
| 66 <button id="StartDelayed" disabled onclick='delayedStart()'>Start Delayed</b
utton> |
| 67 <button id="StopDelayed" onclick='delayedSource.stop()'>Stop Delayed Source<
/button> |
| 68 |
| 69 </body> |
| 70 </html> |
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Chromium Code Reviews
Issue 912803005:
Looping AudioBufferSourceNodes stop only if duration is explicitly given. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk