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How to use timeToSampleFrame method in wpt

Best JavaScript code snippet using wpt

audioparam-testing.js

Source:audioparam-testing.js

...21var context;22// Make sure we render long enough to capture all of our test data.23function renderLength(numberOfTests)24{25    return timeToSampleFrame((numberOfTests + 1) * timeInterval, sampleRate);26}27// Create a buffer containing the same constant value.28function createConstantBuffer(context, constant, length) {29    var buffer = context.createBuffer(1, length, context.sampleRate);30    var n = buffer.length;31    var data = buffer.getChannelData(0);32    for (var k = 0; k < n; ++k) {33        data[k] = constant;34    }35    return buffer;36}37// Create a constant reference signal with the given |value|.  Basically the same as38// |createConstantBuffer|, but with the parameters to match the other create functions.  The39// |endValue| is ignored.40function createConstantArray(startTime, endTime, value, endValue, sampleRate)41{42    var startFrame = timeToSampleFrame(startTime, sampleRate);43    var endFrame = timeToSampleFrame(endTime, sampleRate);44    var length = endFrame - startFrame;45    var buffer = createConstantBuffer(context, value, length);46    return buffer.getChannelData(0);47}48// Create a linear ramp starting at |startValue| and ending at |endValue|.  The ramp starts at time49// |startTime| and ends at |endTime|.  (The start and end times are only used to compute how many50// samples to return.)51function createLinearRampArray(startTime, endTime, startValue, endValue, sampleRate)52{53    var startFrame = timeToSampleFrame(startTime, sampleRate);54    var endFrame = timeToSampleFrame(endTime, sampleRate);55    var length = endFrame - startFrame;56    var array = new Array(length);57    var step = (endValue - startValue) / length;58    for (k = 0; k < length; ++k) {59        array[k] = startValue + k * step;60    }61    return array;62}63// Create an exponential ramp starting at |startValue| and ending at |endValue|.  The ramp starts at64// time |startTime| and ends at |endTime|.  (The start and end times are only used to compute how65// many samples to return.)66function createExponentialRampArray(startTime, endTime, startValue, endValue, sampleRate)67{68    var startFrame = timeToSampleFrame(startTime, sampleRate);69    var endFrame = timeToSampleFrame(endTime, sampleRate);70    var length = endFrame - startFrame;71    var array = new Array(length);72    var multiplier = Math.pow(endValue / startValue, 1 / length);73    74    for (var k = 0; k < length; ++k) {75        array[k] = startValue * Math.pow(multiplier, k);76    }77    return array;78}79function discreteTimeConstantForSampleRate(timeConstant, sampleRate)80{81    return 1 - Math.exp(-1 / (sampleRate * timeConstant));82}83// Create a signal that starts at |startValue| and exponentially approaches the target value of84// |targetValue|, using a time constant of |timeConstant|.  The ramp starts at time |startTime| and85// ends at |endTime|.  (The start and end times are only used to compute how many samples to86// return.)87function createExponentialApproachArray(startTime, endTime, startValue, targetValue, sampleRate, timeConstant)88{89    var startFrame = timeToSampleFrame(startTime, sampleRate);90    var endFrame = timeToSampleFrame(endTime, sampleRate);91    var length = endFrame - startFrame;92    var array = new Array(length);93    var c = discreteTimeConstantForSampleRate(timeConstant, sampleRate);94    var value = startValue;95    96    for (var k = 0; k < length; ++k) {97        array[k] = value;98        value += (targetValue - value) * c;99    }100    return array;101}102// Create a sine wave of the given frequency and amplitude.  The sine wave is offset by half the103// amplitude so that result is always positive.104function createSineWaveArray(durationSeconds, freqHz, amplitude, sampleRate)105{106    var length = timeToSampleFrame(durationSeconds, sampleRate);107    var signal = new Float32Array(length);108    var omega = 2 * Math.PI * freqHz / sampleRate;109    var halfAmplitude = amplitude / 2;110    111    for (var k = 0; k < length; ++k) {112        signal[k] = halfAmplitude + halfAmplitude * Math.sin(omega * k);113    }114    return signal;115}116// Return the difference between the starting value and the ending value for time interval117// |timeIntervalIndex|.  We alternate between an end value that is above or below the starting118// value.119function endValueDelta(timeIntervalIndex)120{121    if (timeIntervalIndex & 1) {122        return -startEndValueChange;123    } else {124        return startEndValueChange;125    }126}127// Return the difference between the starting value at |timeIntervalIndex| and the starting value at128// the next time interval.  Since we started at a large initial value, we decrease the value at each129// time interval.130function valueUpdate(timeIntervalIndex)131{132    return -startingValueDelta;133}134// Compare a section of the rendered data against our expected signal.135function comparePartialSignals(rendered, expectedFunction, startTime, endTime, valueInfo, sampleRate)136{137    var startSample = timeToSampleFrame(startTime, sampleRate);138    var expected = expectedFunction(startTime, endTime, valueInfo.startValue, valueInfo.endValue, sampleRate, timeConstant);139    var n = expected.length;140    var maxError = -1;141    var maxErrorIndex = -1;142    143    for (var k = 0; k < n; ++k) {144        // Make sure we don't pass these tests because a NaN has been generated in either the145        // rendered data or the reference data.146        if (!isValidNumber(rendered[startSample + k])) {147            maxError = Infinity;148            maxErrorIndex = startSample + k;149            testFailed("NaN or infinity for rendered data at " + maxErrorIndex);150            break;151        }152        if (!isValidNumber(expected[k])) {153            maxError = Infinity;154            maxErrorIndex = startSample + k;155            testFailed("Nan or infinity for reference data at " + maxErrorIndex);156            break;157        }158        var error = Math.abs(rendered[startSample + k] - expected[k]);159        if (error > maxError) {160            maxError = error;161            maxErrorIndex = k;162        }163    }164    return {maxError : maxError, index : maxErrorIndex};165}166// Find the discontinuities in the data and compare the locations of the discontinuities with the167// times that define the time intervals. There is a discontinuity if the difference between168// successive samples exceeds the threshold.169function verifyDiscontinuities(values, times, threshold)170{171    var n = values.length;172    var success = true;173    var badLocations = 0;174    var breaks = [];175    // Find discontinuities.176    for (var k = 1; k < n; ++k) {177        if (Math.abs(values[k] - values[k - 1]) > threshold) {178            breaks.push(k);179        }180    }181    var testCount;182    // If there are numberOfTests intervals, there are only numberOfTests - 1 internal interval183    // boundaries. Hence the maximum number of discontinuties we expect to find is numberOfTests -184    // 1. If we find more than that, we have no reference to compare against. We also assume that185    // the actual discontinuities are close to the expected ones.186    //187    // This is just a sanity check when something goes really wrong.  For example, if the threshold188    // is too low, every sample frame looks like a discontinuity.189    if (breaks.length >= numberOfTests) {190        testCount = numberOfTests - 1;191        testFailed("Found more discontinuities (" + breaks.length + ") than expected.  Only comparing first " + testCount + "discontinuities.");192        success = false;193    } else {194        testCount = breaks.length;195    }196    197    // Compare the location of each discontinuity with the end time of each interval. (There is no198    // discontinuity at the start of the signal.)199    for (var k = 0; k < testCount; ++k) {200        var expectedSampleFrame = timeToSampleFrame(times[k + 1], sampleRate);201        if (breaks[k] != expectedSampleFrame) {202            success = false;203            ++badLocations;204            testFailed("Expected discontinuity at " + expectedSampleFrame + " but got " + breaks[k]);205        }206    }207    if (badLocations) {208        testFailed(badLocations + " discontinuities at incorrect locations");209        success = false;210    } else {211        if (breaks.length == numberOfTests - 1) {212            testPassed("All " + numberOfTests + " tests started and ended at the correct time.");213        } else {214            testFailed("Found " + breaks.length + " discontinuities but expected " + (numberOfTests - 1));215            success = false;216        }217    }218    219    return success;220}221// Compare the rendered data with the expected data.222//223// testName - string describing the test224//225// maxError - maximum allowed difference between the rendered data and the expected data226//227// rendererdData - array containing the rendered (actual) data228//229// expectedFunction - function to compute the expected data230//231// timeValueInfo - array containing information about the start and end times and the start and end232// values of each interval.233//234// breakThreshold - threshold to use for determining discontinuities.235function compareSignals(testName, maxError, renderedData, expectedFunction, timeValueInfo, breakThreshold)236{237    var success = true;238    var failedTestCount = 0;239    var times = timeValueInfo.times;240    var values = timeValueInfo.values;241    var n = values.length;242    success = verifyDiscontinuities(renderedData, times, breakThreshold);243    for (var k = 0; k < n; ++k) {244        var result = comparePartialSignals(renderedData, expectedFunction, times[k], times[k + 1], values[k], sampleRate);245        if (result.maxError > maxError) {246            testFailed("Incorrect value for test " + k + ". Max error = " + result.maxError + " at offset " + (result.index + timeToSampleFrame(times[k], sampleRate)));247            ++failedTestCount;248        }249    }250    if (failedTestCount) {251        testFailed(failedTestCount + " tests failed out of " + n);252        success = false;253    } else {254        testPassed("All " + n + " tests passed within an acceptable tolerance.");255    }256      257    if (success) {258        testPassed("AudioParam " + testName + " test passed.");259    } else {260        testFailed("AudioParam " + testName + " test failed.");...

audio-testing.js

Source:audio-testing.js

...130    dataR[0] = 1;131    return audioBuffer;132}133// Convert time (in seconds) to sample frames.134function timeToSampleFrame(time, sampleRate) {135    return Math.floor(0.5 + time * sampleRate);136}137// Compute the number of sample frames consumed by start with138// the specified |grainOffset|, |duration|, and |sampleRate|.139function grainLengthInSampleFrames(grainOffset, duration, sampleRate) {140    var startFrame = timeToSampleFrame(grainOffset, sampleRate);141    var endFrame = timeToSampleFrame(grainOffset + duration, sampleRate);142    return endFrame - startFrame;143}144// True if the number is not an infinity or NaN145function isValidNumber(x) {146    return !isNaN(x) && (x != Infinity) && (x != -Infinity);147}148function shouldThrowTypeError(func, text) {149    var ok = false;150    try {151        func();152    } catch (e) {153        if (e instanceof TypeError) {154            ok = true;155        }...

Using AI Code Generation

1var wpt = require('webpagetest');2var wpt = new WebPageTest('www.webpagetest.org');3wpt.runTest('www.google.com', {video: true}, function(err, data) {4  if (err) return console.error(err);5  wpt.timeToSampleFrame(data.data.testId, function(err, data) {6    if (err) return console.error(err);7    console.log(data);8  });9});10{11  "data": {12  }13}14{15  "data": {16  }17}18{19  "data": {20  }21}22{23  "data": {24  }25}26{27  "data": {

Using AI Code Generation

1var wpt = require('webpagetest');2var test = new wpt('API_KEY');3    if (err) return console.log(err);4    test.timeToSampleFrame(data.data.testId, 'visualComplete', 0, function(err, data) {5        if (err) return console.log(err);6        console.log(data);7    });8});9var wpt = require('webpagetest');10var test = new wpt('API_KEY');11    if (err) return console.log(err);12    test.medianTimeToSampleFrame(data.data.testId, 'visualComplete', function(err, data) {13        if (err) return console.log(err);

Using AI Code Generation

1var wpt = require('webpagetest');2  if (err) {3    console.error('Error: ' + err);4  } else {5    console.log('Test submitted. Polling for results.');6    test.checkTestStatus(data.data.testId, function(err, data) {7      if (err) {8        console.error('Error: ' + err);9      } else {10        console.log('Test completed. Processing results.');11        test.getTestResults(data.data.testId, function(err, data) {12          if (err) {13            console.error('Error: ' + err);14          } else {15            console.log('Test results available at ' + data.data.summary);16            test.getTestResults(data.data.testId, function(err, data) {17              if (err) {18                console.error('Error: ' + err);19              } else {20                console.log('Test results available at ' + data.data.summary);21                var timeToFirstByte = test.timeToFirstByte(data.data);22                console.log('Time to first byte: ' + timeToFirstByte);23                var timeToLastByte = test.timeToLastByte(data.data);24                console.log('Time to last byte: ' + timeToLastByte);25                var timeToStartRender = test.timeToStartRender(data.data);26                console.log('Time to start render: ' + timeToStartRender);27                var timeToFinishRender = test.timeToFinishRender(data.data);28                console.log('Time to finish render: ' + timeToFinishRender);29                var timeToFirstCss = test.timeToFirstCss(data.data);30                console.log('Time to first css: ' + timeToFirstCss);31                var timeToFirstJs = test.timeToFirstJs(data.data);32                console.log('Time to first js: ' + timeToFirstJs);33                var timeToFirstFrame = test.timeToFirstFrame(data.data);34                console.log('Time to first frame: ' + timeToFirstFrame);35                var timeToDocComplete = test.timeToDocComplete(data.data);36                console.log('Time to doc complete: ' + timeToDocComplete);37                var timeToFullyLoaded = test.timeToFullyLoaded(data.data);

Using AI Code Generation

1var wpt = WPT.getInstance();2var timeToSample = wpt.getTimeToSample();3var frame = timeToSample.timeToSampleFrame(1000);4print(frame);5var wpt = WPT.getInstance();6var timeToSample = wpt.getTimeToSample();7var time = timeToSample.sampleToTime(100);8print(time);9var wpt = WPT.getInstance();10var timeToSample = wpt.getTimeToSample();11var count = timeToSample.sampleToCount(100);12print(count);13var wpt = WPT.getInstance();14var timeToSample = wpt.getTimeToSample();15var count = timeToSample.timeToSampleCount(1000);16print(count);17var wpt = WPT.getInstance();

Using AI Code Generation

1var wpt = require('wpt');2var fs = require('fs');3var wpt = new wpt();4var frameNumber = wpt.timeToSampleFrame(1);5var frame = wpt.getFrame(frameNumber);6var image = wpt.getImage(frame);7fs.writeFile('test.png', image, function(err){8  if(err) throw err;9  console.log('It\'s saved!');10});

Using AI Code Generation

1var wpt = require('webpagetest');2var util = require('util');3var test = new wpt('www.webpagetest.org', 'A.6f8b1e0d5c6f5a5f5b5d5b5f5b5f5b5');4  if (err) console.log(err);5  else {6    console.log(util.inspect(data, false, null));7    test.timeToSampleFrame(data.data.testId, data.data.runs[1].firstView.videoFrames, function(err, data) {8      if (err) console.log(err);9      else console.log(util.inspect(data, false, null));10    });11  }12});13var wpt = require('webpagetest');14var util = require('util');15var test = new wpt('www.webpagetest.org', 'A.6f8b1e0d5c6f5a5f5b5d5b5f5b5f5b5');16test.getLocations(function(err, data) {17  if (err) console.log(err);18  else console.log(util.inspect(data, false, null));19});20var wpt = require('webpagetest');21var util = require('util');22var test = new wpt('www.webpagetest.org', 'A.6f8b1e0d5c6f5a5f5b5d5b5f5b5f5b5');23test.getTesters(function(err, data) {24  if (err) console.log(err);25  else console.log(util.inspect(data, false, null));26});27var wpt = require('webpagetest');28var util = require('util');29var test = new wpt('www.webpagetest.org', 'A.6f8b1e0d5c6f5a5f5b5d5b5f5b5f5b5');30test.getTesters(function(err, data

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