Chromium Code Reviews Chromium Code Reviews
Issue 912803005:
Looping AudioBufferSourceNodes stop only if duration is explicitly given. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk| OLD | NEW |
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| (Empty) | |
| 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 | |
| 70 <hr> | |
| 71 <address><a href="mailto:rtoy@google.com">Raymond Toy</a></address> | |
|
hongchan
2015/02/12 18:36:58
What does this part do? Is this needed for the man
Raymond Toy
2015/02/12 21:36:42
Oops. My editor does that automatically. I'll rem
Raymond Toy
2015/02/13 20:07:06
Removed.
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| 72 <!-- Created: Tue Feb 10 15:14:56 PST 2015 --> | |
| 73 <!-- hhmts start --> | |
| 74 Last modified: Tue Feb 10 15:51:39 PST 2015 | |
| 75 <!-- hhmts end --> | |
| 76 </body> | |
| 77 </html> | |
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