test_pannerNode_audioparam_distance.html (1246B)
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <title>Distance effect of a PannerNode with the position set via AudioParams (Bug 1472550)</title> 5 <script 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 SimpleTest.waitForExplicitFinish(); 13 var o = new OfflineAudioContext(2, 256, 44100); 14 15 // We want a stereo constant source. 16 var b = o.createBuffer(2, 1, 44100); 17 b.getChannelData(0)[0] = 1; 18 b.getChannelData(1)[0] = 1; 19 var c = o.createBufferSource(); 20 c.buffer = b; 21 c.loop = true; 22 23 var p = o.createPanner(); 24 p.positionY.setValueAtTime(1, 0); 25 p.positionX.setValueAtTime(1, 0); 26 p.positionZ.setValueAtTime(1, 0); 27 28 // Set the listener somewhere far 29 o.listener.setPosition(20, 2, 20); 30 31 c.start(); 32 c.connect(p).connect(o.destination); 33 34 o.startRendering().then((ab) => { 35 // Check that the distance attenuates the sound. 36 ok(ab.getChannelData(0)[0] < 0.1, "left channel must be very quiet"); 37 ok(ab.getChannelData(1)[0] < 0.1, "right channel must be very quiet"); 38 SimpleTest.finish(); 39 }); 40 </script> 41 </pre> 42 </body> 43 </html>