The Tor Browser: content/media/webaudio/test/test_convolverNodeChannelCount.html@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 <!DOCTYPE HTML>

     2 <html>

     3 <head>

     4   <title>Test ConvolverNode channel count</title>

     5   <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>

     6   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

     7 </head>

     8 <body>

     9 <pre id="test">

    10 <script src="webaudio.js" type="text/javascript"></script>

    11 <script class="testbody" type="text/javascript">

    13 const signalLength = 2048;

    14 const responseLength = 1000;

    15 const outputLength = 2048; // < signalLength + responseLength to test bug 910171

    17 var gTest = {

    18   length: outputLength,

    19   numberOfChannels: 2,

    20   createGraph: function(context) {

    21     var buffer = context.createBuffer(2, signalLength, context.sampleRate);

    22     for (var i = 0; i < signalLength; ++i) {

    23       var sample = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);

    24       // When mixed into a single channel, this produces silence

    25       buffer.getChannelData(0)[i] = sample;

    26       buffer.getChannelData(1)[i] = -sample;

    27     }

    29     var response = context.createBuffer(2, responseLength, context.sampleRate);

    30     for (var i = 0; i < responseLength; ++i) {

    31       response.getChannelData(0)[i] = i / responseLength;

    32       response.getChannelData(1)[i] = 1 - (i / responseLength);

    33     }

    35     var convolver = context.createConvolver();

    36     convolver.buffer = response;

    37     convolver.channelCount = 1;

    39     expectException(function() { convolver.channelCount = 3; },

    40                     DOMException.NOT_SUPPORTED_ERR);

    41     convolver.channelCountMode = "explicit";

    42     expectException(function() { convolver.channelCountMode = "max"; },

    43                     DOMException.NOT_SUPPORTED_ERR);

    44     convolver.channelInterpretation = "discrete";

    45     convolver.channelInterpretation = "speakers";

    47     var source = context.createBufferSource();

    48     source.buffer = buffer;

    49     source.connect(convolver);

    50     source.start(0);

    52     return convolver;

    53   },

    54 };

    56 runTest();

    58 </script>

    59 </pre>

    60 </body>

    61 </html>

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