66 lines
2.0 KiB
JavaScript
66 lines
2.0 KiB
JavaScript
(function(){
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"use strict";
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function byteArrayToHex(arrayBuffer){
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var chunks = [];
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(new Uint32Array(arrayBuffer)).forEach(function(num){
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chunks.push(num.toString(16));
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});
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return chunks.map(function(chunk){
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return "0".repeat(8 - chunk.length) + chunk;
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}).join("");
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}
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var container = document.getElementById("test");
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var pxi_output;
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var pxi_full_buffer;
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function run_pxi_fp(){
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var context = new window.OfflineAudioContext(1, 44100, 44100);
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// Create oscillator
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var pxi_oscillator = context.createOscillator();
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pxi_oscillator.type = "triangle";
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pxi_oscillator.frequency.value = 1e4;
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// Create and configure compressor
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var pxi_compressor = context.createDynamicsCompressor();
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pxi_compressor.threshold && (pxi_compressor.threshold.value = -50);
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pxi_compressor.knee && (pxi_compressor.knee.value = 40);
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pxi_compressor.ratio && (pxi_compressor.ratio.value = 12);
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pxi_compressor.reduction && (pxi_compressor.reduction.value = -20);
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pxi_compressor.attack && (pxi_compressor.attack.value = 0);
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pxi_compressor.release && (pxi_compressor.release.value = .25);
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// Connect nodes
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pxi_oscillator.connect(pxi_compressor);
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pxi_compressor.connect(context.destination);
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// Start audio processing
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pxi_oscillator.start(0);
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context.startRendering();
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context.oncomplete = function(event) {
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var str = "";
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var copyTest = new Float32Array(44100);
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event.renderedBuffer.copyFromChannel(copyTest, 0);
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var getTest = event.renderedBuffer.getChannelData(0);
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Promise.all([
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crypto.subtle.digest("SHA-256", getTest),
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crypto.subtle.digest("SHA-256", copyTest),
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]).then(function(hashes){
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container.querySelector(".hash").textContent =
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byteArrayToHex(hashes[0]) +
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" / " +
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byteArrayToHex(hashes[1]);
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});
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var sum = 0;
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for (var i = 4500; i < 5000; i += 1) {
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sum += Math.abs(getTest[i]);
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}
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container.querySelector(".sum").textContent = sum;
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pxi_compressor.disconnect();
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};
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}
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run_pxi_fp();
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container.querySelector("button").addEventListener("click", run_pxi_fp);
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}()); |