The Tor Browser: content/media/webaudio/test/test_delayNodeWithGain.html@44a2da4a2ab2 (annotated)

content/media/webaudio/test/test_delayNodeWithGain.html@44a2da4a2ab2 (annotated)

Fri, 16 Jan 2015 04:50:19 +0100

Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32

 <!DOCTYPE HTML>
 <html>
 <head>
   <title>Test DelayNode with a GainNode</title>
   <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body>
 <pre id="test">
 <script src="webaudio.js" type="text/javascript"></script>
 <script class="testbody" type="text/javascript">
 var gTest = {
   length: 4096,
   numberOfChannels: 1,
   createGraph: function(context) {
     var buffer = context.createBuffer(1, 2048, context.sampleRate);
     for (var i = 0; i < 2048; ++i) {
       buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
     }
     var source = context.createBufferSource();
     var delay = context.createDelay();
     source.buffer = buffer;
     var gain = context.createGain();
     gain.gain.value = 0.5;
     source.connect(gain);
     gain.connect(delay);
     // Delay the source stream by 2048 frames
     delay.delayTime.value = 2048 / context.sampleRate;
     source.start(0);
     return delay;
   },
   createExpectedBuffers: function(context) {
     var expectedBuffer = context.createBuffer(1, 2048 * 2, context.sampleRate);
     for (var i = 2048; i < 2048 * 2; ++i) {
       expectedBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * (i - 2048) / context.sampleRate) / 2;
     }
     return expectedBuffer;
   },
 };
 runTest();
 </script>
 </pre>
 </body>
 </html>