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Added test for audio faking

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kkapsner 2018-06-30 23:15:47 +02:00
parent d580c35898
commit b4a8507140
3 changed files with 83 additions and 0 deletions
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66
test/audioTest.js Normal file
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(function(){
"use strict";
function byteArrayToHex(arrayBuffer){
var chunks = [];
(new Uint32Array(arrayBuffer)).forEach(function(num){
chunks.push(num.toString(16));
});
return chunks.map(function(chunk){
return "0".repeat(8 - chunk.length) + chunk;
}).join("");
}
var container = document.getElementById("test");
var pxi_output;
var pxi_full_buffer;
function run_pxi_fp(){
var context = new window.OfflineAudioContext(1, 44100, 44100);
// Create oscillator
var pxi_oscillator = context.createOscillator();
pxi_oscillator.type = "triangle";
pxi_oscillator.frequency.value = 1e4;
// Create and configure compressor
var pxi_compressor = context.createDynamicsCompressor();
pxi_compressor.threshold && (pxi_compressor.threshold.value = -50);
pxi_compressor.knee && (pxi_compressor.knee.value = 40);
pxi_compressor.ratio && (pxi_compressor.ratio.value = 12);
pxi_compressor.reduction && (pxi_compressor.reduction.value = -20);
pxi_compressor.attack && (pxi_compressor.attack.value = 0);
pxi_compressor.release && (pxi_compressor.release.value = .25);
// Connect nodes
pxi_oscillator.connect(pxi_compressor);
pxi_compressor.connect(context.destination);
// Start audio processing
pxi_oscillator.start(0);
context.startRendering();
context.oncomplete = function(evnt) {
var str = "";
var copyTest = new Float32Array(44100);
evnt.renderedBuffer.copyFromChannel(copyTest, 0);
var getTest = evnt.renderedBuffer.getChannelData(0);
Promise.all([
crypto.subtle.digest("SHA-256", getTest),
crypto.subtle.digest("SHA-256", copyTest),
]).then(function(hashes){
container.querySelector(".hash").textContent =
byteArrayToHex(hashes[0]) +
" / " +
byteArrayToHex(hashes[1]);
});
var sum = 0;
for (var i = 4500; i < 5000; i += 1) {
sum += Math.abs(getTest[i]);
}
container.querySelector(".sum").textContent = sum;
pxi_compressor.disconnect();
};
}
run_pxi_fp();
container.querySelector("button").addEventListener("click", run_pxi_fp);
}());