Comments (1)
Concept inspired by https://audiofingerprint.openwpm.com:
https://es6console.com/kd9pjq7z/
const hashMini = str => {
const json = `${JSON.stringify(str)}`
let i, len, hash = 0x811c9dc5
for (i = 0, len = json.length; i < len; i++) {
hash = Math.imul(31, hash) + json.charCodeAt(i) | 0
}
return ('0000000' + (hash >>> 0).toString(16)).substr(-8)
}
const getAudioProps = () => {
const contextOffline = OfflineAudioContext || webkitOfflineAudioContext
const audioOffline = new contextOffline(1, 44100, 44100)
const oscillator = audioOffline.createOscillator()
const dynamicsCompressor = audioOffline.createDynamicsCompressor()
const analyser = audioOffline.createAnalyser()
const biquadFilter = audioOffline.createBiquadFilter()
const audioData = {
analyserChannelCount: analyser.channelCount,
analyserChannelCountMode: analyser.channelCountMode,
analyserChannelInterpretation: analyser.channelInterpretation,
analyserSampleRate: analyser.context.sampleRate,
analyserFftSize: analyser.fftSize,
analyserFrequencyBinCount: analyser.frequencyBinCount,
analyserMaxDecibels: analyser.maxDecibels,
analyserMinDecibels: analyser.minDecibels,
analyserNumberOfInputs: analyser.numberOfInputs,
analyserNumberOfOutputs: analyser.numberOfOutputs,
analyserSmoothingTimeConstant: analyser.smoothingTimeConstant,
analyserContextListenerForwardXMax: analyser.context.listener.forwardX.maxValue,
dynamicsCompressorAttackDefault: dynamicsCompressor.attack.defaultValue,
dynamicsCompressorKneeDefault: dynamicsCompressor.knee.defaultValue,
dynamicsCompressorKneeMax: dynamicsCompressor.knee.maxValue,
dynamicsCompressorRatioDefault: dynamicsCompressor.ratio.defaultValue,
dynamicsCompressorRatioMax: dynamicsCompressor.ratio.maxValue,
dynamicsCompressorReleaseDefault: dynamicsCompressor.release.defaultValue,
dynamicsCompressorReleaseMax: dynamicsCompressor.release.maxValue,
dynamicsCompressorThresholdDefault: dynamicsCompressor.threshold.defaultValue,
dynamicsCompressorThresholdMin: dynamicsCompressor.threshold.minValue,
oscillatorDetuneMax: oscillator.detune.maxValue,
oscillatorDetuneMin: oscillator.detune.minValue,
oscillatorFrequencyDefault: oscillator.frequency.defaultValue,
oscillatorFrequencyMax: oscillator.frequency.maxValue,
oscillatorFrequencyMin: oscillator.frequency.minValue,
biquadFilterGainMax: biquadFilter.gain.maxValue,
biquadFilterFrequencyMax: biquadFilter.frequency.maxValue,
biquadFilterFrequencyMin: biquadFilter.frequency.minValue
}
//console.log(biquadFilter)
return audioData
}
a = getAudioProps()
console.log(a)
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