The Tor Browser: content/media/webaudio/test/test_convolverNode_mono

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

     1 <!DOCTYPE html>

     3 <html>

     4 <head>

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

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

     7 <script type="text/javascript" src="layouttest-glue.js"></script>

     8 <script type="text/javascript" src="blink/audio-testing.js"></script>

     9 <script type="text/javascript" src="blink/convolution-testing.js"></script>

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

    11 </head>

    13 <body>

    15 <div id="description"></div>

    16 <div id="console"></div>

    18 <script>

    19 description("Tests ConvolverNode processing a mono channel with mono impulse response.");

    20 SimpleTest.waitForExplicitFinish();

    22 // To test the convolver, we convolve two square pulses together to

    23 // produce a triangular pulse.  To verify the result is correct we

    24 // check several parts of the result.  First, we make sure the initial

    25 // part of the result is zero (due to the latency in the convolver).

    26 // Next, the triangular pulse should match the theoretical result to

    27 // within some roundoff.  After the triangular pulse, the result

    28 // should be exactly zero, but round-off prevents that.  We make sure

    29 // the part after the pulse is sufficiently close to zero.  Finally,

    30 // the result should be exactly zero because the inputs are exactly

    31 // zero.

    32 function runTest() {

    33     if (window.testRunner) {

    34         testRunner.dumpAsText();

    35         testRunner.waitUntilDone();

    36     }

    38     window.jsTestIsAsync = true;

    40     // Create offline audio context.

    41     var context = new OfflineAudioContext(2, sampleRate * renderLengthSeconds, sampleRate);

    43     var squarePulse = createSquarePulseBuffer(context, pulseLengthFrames);

    44     var trianglePulse = createTrianglePulseBuffer(context, 2 * pulseLengthFrames);

    46     var bufferSource = context.createBufferSource();

    47     bufferSource.buffer = squarePulse;

    49     var convolver = context.createConvolver();

    50     convolver.normalize = false;

    51     convolver.buffer = squarePulse;

    53     bufferSource.connect(convolver);

    54     convolver.connect(context.destination);

    56     bufferSource.start(0);

    58     context.oncomplete = checkConvolvedResult(trianglePulse);

    59     context.startRendering();

    60 }

    62 function finishJSTest() {

    63   SimpleTest.finish();

    64 }

    66 runTest();

    67 successfullyParsed = true;

    69 </script>

    71 <script src="../fast/js/resources/js-test-post.js"></script>

    72 </body>

    73 </html>

The Tor Browser / file revision