Created
August 5, 2012 15:16
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Web Audio API, proc audio / media element source Safari bug
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Web Audio API Test</title> | |
| <style>#data{ color: #ff0077; font-weight: bold;}</style> | |
| </head> | |
| <body> | |
| <h1>Processing audio from Media Element Source</h1> | |
| <h2>Works in Chrome, fails in Safari</h2> | |
| <audio controls="controls"> | |
| <source src="test.mp3" type="audio/mpeg" /> | |
| <source src="test.ogg" type="audio/ogg" /> | |
| </audio> | |
| <div id="data">Data not yet found</div> | |
| <script> | |
| (function () { | |
| var ctx, proc, src, color, | |
| audio = document.getElementsByTagName('audio')[0], | |
| dataEl = document.getElementById('data'); | |
| audio.readyState < 3 ? | |
| audio.addEventListener('canplay', connect) : | |
| connect(); | |
| function connect () { | |
| ctx = new webkitAudioContext(), | |
| proc = ctx.createJavaScriptNode(2048), | |
| src = ctx.createMediaElementSource(audio); | |
| proc.onaudioprocess = function (e) { | |
| var d = e.inputBuffer.getChannelData(0)[0]; | |
| if (d) { | |
| color || (color = dataEl.style.color = '#aaee22'); | |
| dataEl.innerHTML = 'Data found: ' + d; | |
| } | |
| } | |
| src.connect( proc ); | |
| src.connect( ctx.destination ); | |
| proc.connect( ctx.destination ); | |
| } | |
| })(); | |
| </script> | |
| <!-- View at http://screamingrobots.com/misc/safariaudiobug/ --> | |
| </body> | |
| </html> |
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It's working for me in current Safari 6.0.4.