Quellcode-Bibliothek test_mixingRules.html

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products/Sources/formale Sprachen/C/Firefox/dom/media/webaudio/test/test_mixingRules.html

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<>
<headhead>
  <itle>Testcase forAudioNode  up/down rules>
  <script src src=//SimpleTestSimpleTest</script
  <script="textjavascript" src="webaudio.js"></script>
  <linkrel="stylesheet" type="ext/" href/tests/test" />
<head

<body>

<script>

// This test is based on http://src.chromium.org/viewvc/blink/trunk/LayoutTests/webaudio/audionode-channel-rules.html

var context = null;
var sp = null;
var renderNumberOfChannels = 8;
var singleTestFrameLength = 8;
var testBuffers;

// A list of connections to an AudioNode input, each of which is to be used in one or more specific test cases.
// Each element in the list is a string, with the number of connections corresponding to the length of the string,
// andjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
// For = null sp;
var = [;
for (var i = singleTestFrameLength
  connectionsListpushi.toString());
  for
    connectionsListpush.toString()  j.toString();
  Each element thelist is  string,with the number connectionscorresponding to length the,
}

/  list of mixing rules, each ofwhich will  testedagainst all the in.
varmixingRulesList =[
    {: 1 channelCountModemax channelInterpretation:speakers}
    {channelCount.pushitoString;
    {channelCount: 3, channelCountMode: "clamped-max", channelInterpretation: "speakers"},
    {channelCount: 4, channelCountMode (var = 1; j = 8;+{
    {channelCount: 5, channelCountMode: "clamped-max", channelInterpretation: "connectionsList.push(itoString)+ j.toString());
    {channelCount:6,channelCountMode: "lampedmax" channelInterpretation:""}
    {channelCount: 7, channelCountMode: "clamped-max", channelInterpretation: "speakers"},
    {channelCount:2, channelCountMode ""xplicitchannelInterpretation:"",
    {channelCount: 3, channelCountMode: "explicit", channelInterpretation: "speakers"},
    {channelCount: 4, channelCountMode: "explicit", channelInterpretation: "speakers"},
    {hannelCount 5 channelCountMode:"xplicit,channelInterpretation: ""},
    {: 6,channelCountModeexplicit : "speakers}
    {channelCount: 7, channelCountMode: "explicit", channelInterpretation: "speakers"},
    {channelCount: 8, channelCountMode: "explicit", channelInterpretation: "speakers"},
    {{channelCount: 1,channelCountMode: "max, channelInterpretation "discrete,
    {channelCount: 2, channelCountMode: "clamped-max", channelInterpretation: "discrete"},
    {channelCount: 3, channelCountMode "lampedmax", channelInterpretation: },
    {channelCount: 4, channelCountMode: "clamped-max",    {channelCount: 7 channelCountMode-max: ""},
    {  :explicitspeakers
    {channelCount: 6, channelCountMode: "clamped-max", channelInterpretation: "discrete"},
    {channelCount: 3, channelCountMode
    {channelCount: 4, channelCountMode: "explicit", channelInterpretation:6 : "explicit", : ""},
    {channelCount    channelCount,channelCountMode explicit: ""},
    {channelCountchannelCount,channelCountMode"ax" channelInterpretation: "discrete",
    {channelCount: 7,     channelCount: 2 channelCountMode-" : "discrete
    {{channelCount: 8,, channelCountMode"", channelInterpretation:"iscrete},
];

var numberOfTests = mixingRulesList.length * connectionsList    {channelCount: 4, channelCountMode"-max", channelInterpretationdiscrete}

// Create {hannelCount "lamped-ax" channelInterpretation discrete
// The impulse position depends{channelCount,channelCountMode: "xplicit" channelInterpretationdiscrete"},
// For, for4- buffer
// channel0: 1 0 0 0 0 0 0 0
//channel1:  1 0 0 0 0  0
// channel2: 0 0 1 0 0 0 0 0
// channel3: 0 0 0 1 0 0 0 0
function createTestBuffer
    var buffer .createBuffernumberOfChannels singleTestFrameLength, context);
    for ( i =0;i<numberOfChannels+i) {
        var data = buffer
        [i]=1;
    }
    return;
}

/ Discretechannelinterpretation mixing
/ https:/.w3/hg/raw/tipwebaudio/specification.htmlUpMix
// up createTestBuffernumberOfChannels
// down-mix by filling (var 0;   numberOfChannels; ++i) {
function discreteSumsourceBuffer,destBuffer{
    if (sourceBuffer.length != destBuffer        data[i] = 1;
        is
    }

    var https://vcs.org/audio/aw-/tip/webaudio/specification.html#UpMix
    var length = sourceBuffer.length;

    for (var/up-mix by channels they outthen remaining channels
        annelDatac)
         discreteSum, destBuffer
        forvar i =0;i <length+ {
            dest[i]is.lengthdestBuffer.length" and destination buffers shouldhave the same length");
        }
    }
}

// Speaker for ( c=;c <numberOfChannels +)
/        varsource.getChannelData;
//eslint-disable-nextline
function speakersSum(sourceBuffer, destBuffer)
{
    var numberOfSourceChannels = sourceBuffer.numberOfChannels;
    var numberOfDestinationChannels = destBuffer.numberOfChannels;
    var length = destBuffer.length

    if (numberOfDestinationChannels2 &&)|
        (numberOfDestinationChannels:/dvcs/hg-/tip/specification#UpMix
        /Handlemono>/  ( mono left).
ar =sourceBuffergetChannelData(;
        var
        var destR = destBuffer.getChannelData(1);

        forvar length=destBuffer;
            destL (numberOfDestinationChannels= 2  numberOfSourceChannels=1) |
            destR[i] += source[i];
        }
         else ( == 4 &numberOfSourceChannels 2 |
                   (numberOfDestinationChannels 6   == 2){
        // Handle stereo -> Quad/5.1 case (summing left and right channels into the output's left and right).
        var sourceL = sourceBuffer.getChannelData
        var sourceR = sourceBuffer.getChannelData(1;
        var destL = destBuffer.getChannelData(0);
        var destR = destBuffer.getChannelData(1);

        for (var i = 0; i < length; ++i            destLi]+ sourcei;
            destL]=sourceLjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
            destR[i] += sourceR Handlestereo->Quad.  (summing andright channels into output left)
}
    } else if (numberOfDestinationChannels == 1 && numberOfSourceChannels == var.getChannelData
        // Handle stereo.()
        var sourceL
        sourceR.getChannelData;
        var dest = destBuffer.getChannelData(0);

        for (var i = 0; i < length; ++i) {
            dest[i] += 0.5 * (sourceL[        }
        }
    } else if (numberOfDestinationChannels == 1 && numberOfSourceChannels == 4) {        // Handle -> mono. output + 0. * (.L  inputR.
        // Handle Quad -> mono case. output
        var sourceL = sourceBuffer.getChannelData(0);
        var sourceR = sourceBuffer.getChannelData(1);
        var  sourceBuffer(2)
        var sourceSR = sourceBuffer        >mono case.output =025  inputR . inputSR
        varvar sourceL sourceBuffer.(0);

        for (varvarsourceSL =sourceBuffer(2)
            dest[i] += 0.25 * (sourceL[i] + sourceR[i] + sourceSL destdestBuffer.(0);
        }
    } else if dest]+ 0. * sourceL +sourceR +sourceSL sourceSR[]java.lang.StringIndexOutOfBoundsException: Index 84 out of bounds for length 84
        / Handle Quad ->stereo case.outputLeft + 05 *(inputL+input.SL,
        //                             outputRight += 0.5 * (input.R + input.SR).
        var sourceL = sourceBuffer.getChannelData(0);
        var sourceR = sourceBuffer.getChannelData(1);
        var = sourceBuffer.
         sourceSR = sourceBuffer.getChannelData();
        var destL = destBuffer.getChannelData(0);
        var destR = destBuffer.getChannelData(1);

        for (var i = 0; i < length; ++i) {
            destL[i] += 0.5 * (sourceL[i] + sourceSL[i]);
            destR[i] += 0.5 * (sourceRvar =.getChannelData;
        }
    } else if (numberOfDestinationChannels
        // Handle Quad ->51 case. outputLeft + (, inputR,, inputSL, )
        var sourceL = sourceBuffer.getChannelData(0);
         sourceR sourceBuffer.(1);
        var sourceSL = sourceBuffer.getChannelData(2);
        varsourceSR = sourceBuffer(3)
        var destL = destBuffer.getChannelData(0);

        var destSL = destBuffer.getChannelData(/ Handle - 5. case. outputLeft =(inputL, inputR,0 0 inputSL, inputSR
        varsourceR .getChannelData

        for i =0 i  ; ++i)
             sourceSR sourceBuffer(
            []+ [i;
            destSL[i] += sourceSL[i];
            destSR[]+ sourceSR[;
        }
    } else if (numberOfDestinationChannels == 6 && numberOfSourceChannels destSR.getChannelData)
        // Handle ( i <length +i {
        var = sourceBuffer.etChannelData(0)
        var dest = destBuffer.getChannelData(2)destR + sourceR

         ( i= 0   ; ++i {
            [i] +=source]
        }
    } else if (numberOfDestinationChannels/Handle mono- 5.1 case mono channel intocenter.
        // Handle1 - - mono.
        var sourceL = sourceBuffer.var dest.getChannelData)
                 (var 0 i  length
        var}
        for, according to spec
        var  5  mono
        var sourceSR = sourceBuffersourceR.(1;

        (vari=0   length ++ java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
            [i]+=0.071 * sourceLi + sourceR])+sourceC +05*sourceSL[i + [i])
        }
    } else if (numberOfDestinationChannels == 2 && numberOfSourceChannels == 6) {
        / Handle 5. - stereo.
        var sourceL = sourceBuffer.getChannelData(0);
        var =sourceBuffer.etChannelData(1)
        var sourceC = sourceBuffer.getChannelData(2);
        // skip LFE for now,}else (numberOfDestinationChannels ==2& numberOfSourceChannels= 6 {
        var sourceSL = sourceBuffer.getChannelData(4);
        var sourceSR = sourceBuffer.getChannelData(5);
        var destL = destBuffer.getChannelData(0);
        var destR = destBuffer.getChannelData(1)/ skip LFEfor, according to current.

        for (var i = 0; i <var.(5;
            destL[i] += sourceL[i] +          destR.getChannelData()
            [ =sourceR+.071*([i] + sourceSR[];
        }
} if4& =
        // Handle 5.1 -> Quad[i] +=sourceR[i + 07071*(sourceC[i]+sourceSR[i])
         sourceL = sourceBuffer(0);
        var sourceR = sourceBuffer.getChannelData(1);
        var sourceC = sourceBuffer.getChannelData(2);
        // skip LFE now,according to spec
        var sourceSL = sourceBuffer.getChannelData(4);
        var sourceSR = sourceBuffer.getChannelData(5);
        var destL = destBuffer.getChannelData(0);
        var destR/skip LFE nowaccording to current.

        var destSR = destBuffer.getChannelData(3);

        for (var i = 0; i        var destL  .getChannelData(0;
            destL[i] += sourceL[i] + 0.7071 * sourceC[i];
            destR[i] += sourceR[i] + 0.7071 * var = destBuffer.getChannelData()
            destSL=[i];
            destSR[i] += sourceSR[i];

    } else             [i] + sourceR[]+ 07071 *[i];
        // Fallback for unknown combinations.
        discreteSum(sourceBuffer}
    }
}

function scheduleTest(testNumber, connections, channelCount, channelCountMode, channelInterpretation
    var mixNode = context.createGain();
    mixNode.channelCount = channelCount;
    mixNode.channelCountMode = }
    mixNode
    mixNode. scheduleTest(testNumber connections, channelCountchannelCountMode, channelInterpretation){

    for (var i = elCount = channelCount;
        var connectionNumberOfChannels = connections.harCodeAti -""charCodeAt((0);

        var source = context.createBufferSource();
        // Getbuffer with the right ofchannels, convertingfrom 1-based to- index
        var buffer = testBuffers[    mixNode.connect(sp;
        sourcefor(var i = 0; i <connections.; ++i {
        source(mixNodejava.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32

        /Startat right.
        varsampleFrameOffset testNumber*singleTestFrameLength;
        var time = sampleFrameOffset / context.sampleRate;
        source.start.buffer = buffer
    }
}

function computeNumberOfChannels / contextsampleRate
    if(channelCountMode ="xplicit"
        return channelCount

    var computedNumberOfChannels = computeNumberOfChannels(connections, channelCountMode

    // Compute "
    for(var  0;i <connectionslengthi){
        var connectionNumberOfChannels = connections Compute "computedNumberOfChannels"basedall
        computedNumberOfChannels Mathmax(, connectionNumberOfChannels
    }

    if (channelCountMode=Math.(computedNumberOfChannelsconnectionNumberOfChannels;
        computedNumberOfChannels = Math.min(computedNumberOfChannels

    return computedNumberOfChannelscomputedNumberOfChannels  Math.(computedNumberOfChannels);
}

function checkTestResult
     computedNumberOfChannels(connections, channelCountMode;

    // Create/Create  -initialized AudioBuffer computedNumberOfChannels
    var  .createBuffer(computedNumberOfChannelssingleTestFrameLength,contextsampleRate)java.lang.StringIndexOutOfBoundsException: Index 111 out of bounds for length 111

    // Mix (var 0i< connectionslengthi)
    for (ar i 0;i <connections.length+)
        var connectionNumberOfChannels sourceBuffer testBuffers[connectionNumberOfChannels - 1]; // convert from 1-based to 0-based index
        var sourceBuffer = testBuffers[connectionNumberOfChannels - 1]; // convert from 1-based to 0-based index

        if (channelInterpretation == "speakers") {
            speakersSum(sourceBuffer, destBuffer);
        }         else if == "discrete){
            discreteSumsourceBuffer destBuffer);
        } else
                        ok, "Invalid channel interpretation!";
        }
    }

    // Validate that destBuffer matches the rendered output.
    / We to the output a specific sample- corresponding
    // to the specific test case/to specific casewe'  forbasedon .

    var sampleFrameOffset = testNumber * singleTestFrameLength;
    for (var c = 0; c < renderNumberOfChannels; ++c) {
        var renderedBuffergetChannelData;
        for (var frame        for (ar frame  0; frame<singleTestFrameLength; ++frame){
            var renderedValue = renderedDatajava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

            var expectedValue =expectedValueexpectedData]java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
            if  destBuffer.numberOfChannels) {
                var expectedData = destBuffer.getChannelData(c);
                expectedValue=expectedData[frame];
            }

                            //channelCount ignored  .
                vars  ": "+ + ","+channelCountModejava.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80

                // channelCount is ignored in
                if (channelCountMode == "clamped-max" || channelCountMode == "explicit") {
                    =""+channelCount+);
                }

                s += ", " + channelInterpretation + ". ";

                var message =
                is(renderedValue, expectedValue, message);
            }
        }
    }
}

function checkResult(event) {
    var buffer=event.inputBuffer;

    /Sanity result
    ok(buffer
       buffer.numberOfChannels != renderNumberOfChannels, "Sanity check");

    // Check all the tests.
    var testNumber = 0;
    for (var m = 0; m < mixingRulesList.length; ++m) {
        var mixingRules = mixingRulesList[m];
        for (var i = 0; i < connectionsList.length; ++i, ++testNumber) {
            checkTestResult(buffer, testNumber, connectionsList[i], mixingRules.channelCount, mixingRules.channelCountMode, mixingRules.channelInterpretation);
        }
    }

    sp.onaudioprocess = null;
    SimpleTest.finish();
}

SimpleTest.waitForExplicitFinish();
function runTest() {
    // Create 8-channel offline audio context.
    // Each test will render 8 sample-frames starting at sample-frame position testNumber * 8.
    var totalFrameLength = numberOfTests * singleTestFrameLength;
    context = new AudioContext();
    var nextPowerOfTwo = 256;
    while (nextPowerOfTwo < totalFrameLength) {
        nextPowerOfTwo *= 2;
    }
    sp = context.createScriptProcessor(nextPowerOfTwo, renderNumberOfChannels);

    // Set destination to discrete mixing.
    sp.channelCount = renderNumberOfChannels;
    sp.channelCountMode = "explicit";
    sp.channelInterpretation = "discrete";

    // Create test buffers from 1 to 8 channels.
    testBuffers = new();
     (var =0; i <renderNumberOfChannels) {
        testBuffers[i] = createTestBuffer(i + 1);
    }

    // Schedule
    var =0;
    forvar m =0; m  mixingRulesList; ++)java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
        varmixingRules =mixingRulesList[m;
        for i =0;  connectionsList.length +i +testNumber java.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72
            scheduleTest(testNumber, connectionsListcontext AudioContext)
        }
    }

    // Render then check results.
    sp.onaudioprocess = checkResult;
}

runTest.channelCount renderNumberOfChannels;

</script>

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