mirror of
https://github.com/gchq/CyberChef.git
synced 2025-05-06 22:47:11 -04:00
Merge 6d51f53829 into a3944fe1d1
This commit is contained in:
Brunon Blok
GitHub
commit
747d4b43d3
4 changed files with 348 additions and 1 deletions
28
package-lock.json
generated
28
package-lock.json
generated
|
|
@ -36,6 +36,7 @@
|
|||
"d3": "7.8.5",
|
||||
"d3-hexbin": "^0.2.2",
|
||||
"diff": "^5.1.0",
|
||||
"dsp.js": "^1.0.1",
|
||||
"es6-promisify": "^7.0.0",
|
||||
"escodegen": "^2.1.0",
|
||||
"esprima": "^4.0.1",
|
||||
|
|
@ -90,6 +91,7 @@
|
|||
"unorm": "^1.6.0",
|
||||
"utf8": "^3.0.0",
|
||||
"vkbeautify": "^0.99.3",
|
||||
"wavefile": "^11.0.0",
|
||||
"xmldom": "^0.6.0",
|
||||
"xpath": "0.0.34",
|
||||
"xregexp": "^5.1.1",
|
||||
|
|
@ -6170,6 +6172,11 @@
|
|||
"url": "https://github.com/motdotla/dotenv?sponsor=1"
|
||||
}
|
||||
},
|
||||
"node_modules/dsp.js": {
|
||||
"version": "1.0.1",
|
||||
"resolved": "https://registry.npmjs.org/dsp.js/-/dsp.js-1.0.1.tgz",
|
||||
"integrity": "sha512-5ols1j2i2tdbtd38DMR6xGSmE8dE/qFWgqrNN1ZNnIZnOEAFjzoVq5hM57nbQS9u0VmxqCUw8YccgsS9+zhtNg=="
|
||||
},
|
||||
"node_modules/duplexer": {
|
||||
"version": "0.1.2",
|
||||
"dev": true,
|
||||
|
|
@ -14194,6 +14201,17 @@
|
|||
"node": ">=10.13.0"
|
||||
}
|
||||
},
|
||||
"node_modules/wavefile": {
|
||||
"version": "11.0.0",
|
||||
"resolved": "https://registry.npmjs.org/wavefile/-/wavefile-11.0.0.tgz",
|
||||
"integrity": "sha512-/OBiAALgWU24IG7sC84cDO/KfFuvajWc5Uec0oV2zrpOOZZDgGdOwHwgEzOrwh8jkubBk7PtZfQBIcI1OaE5Ng==",
|
||||
"bin": {
|
||||
"wavefile": "bin/wavefile.js"
|
||||
},
|
||||
"engines": {
|
||||
"node": ">=8"
|
||||
}
|
||||
},
|
||||
"node_modules/wbuf": {
|
||||
"version": "1.7.3",
|
||||
"dev": true,
|
||||
|
|
@ -19299,6 +19317,11 @@
|
|||
"integrity": "sha512-IPzF4w4/Rd94bA9imS68tZBaYyBWSCE47V1RGuMrB94iyTOIEwRmVL2x/4An+6mETpLrKJ5hQkB8W4kFAadeIQ==",
|
||||
"dev": true
|
||||
},
|
||||
"dsp.js": {
|
||||
"version": "1.0.1",
|
||||
"resolved": "https://registry.npmjs.org/dsp.js/-/dsp.js-1.0.1.tgz",
|
||||
"integrity": "sha512-5ols1j2i2tdbtd38DMR6xGSmE8dE/qFWgqrNN1ZNnIZnOEAFjzoVq5hM57nbQS9u0VmxqCUw8YccgsS9+zhtNg=="
|
||||
},
|
||||
"duplexer": {
|
||||
"version": "0.1.2",
|
||||
"dev": true
|
||||
|
|
@ -24892,6 +24915,11 @@
|
|||
"graceful-fs": "^4.1.2"
|
||||
}
|
||||
},
|
||||
"wavefile": {
|
||||
"version": "11.0.0",
|
||||
"resolved": "https://registry.npmjs.org/wavefile/-/wavefile-11.0.0.tgz",
|
||||
"integrity": "sha512-/OBiAALgWU24IG7sC84cDO/KfFuvajWc5Uec0oV2zrpOOZZDgGdOwHwgEzOrwh8jkubBk7PtZfQBIcI1OaE5Ng=="
|
||||
},
|
||||
"wbuf": {
|
||||
"version": "1.7.3",
|
||||
"dev": true,
|
||||
|
|
|
|||
|
|
@ -118,6 +118,7 @@
|
|||
"d3": "7.8.5",
|
||||
"d3-hexbin": "^0.2.2",
|
||||
"diff": "^5.1.0",
|
||||
"dsp.js": "^1.0.1",
|
||||
"es6-promisify": "^7.0.0",
|
||||
"escodegen": "^2.1.0",
|
||||
"esprima": "^4.0.1",
|
||||
|
|
@ -172,6 +173,7 @@
|
|||
"unorm": "^1.6.0",
|
||||
"utf8": "^3.0.0",
|
||||
"vkbeautify": "^0.99.3",
|
||||
"wavefile": "^11.0.0",
|
||||
"xmldom": "^0.6.0",
|
||||
"xpath": "0.0.34",
|
||||
"xregexp": "^5.1.1",
|
||||
|
|
|
|||
|
|
@ -485,7 +485,8 @@
|
|||
"Hex Density chart",
|
||||
"Scatter chart",
|
||||
"Series chart",
|
||||
"Heatmap chart"
|
||||
"Heatmap chart",
|
||||
"Generate Spectrogram"
|
||||
]
|
||||
},
|
||||
{
|
||||
|
|
|
|||
316
src/core/operations/GenerateSpectrogram.mjs
Normal file
316
src/core/operations/GenerateSpectrogram.mjs
Normal file
|
|
@ -0,0 +1,316 @@
|
|||
/**
|
||||
* @author brun0ne [brunonblok@gmail.com]
|
||||
* @copyright Crown Copyright 2023
|
||||
* @license Apache-2.0
|
||||
*/
|
||||
|
||||
import Operation from "../Operation.mjs";
|
||||
import OperationError from "../errors/OperationError.mjs";
|
||||
|
||||
import Utils from "../Utils.mjs";
|
||||
import { isType, detectFileType } from "../lib/FileType.mjs";
|
||||
|
||||
import jimp from "jimp";
|
||||
import {isWorkerEnvironment} from "../Utils.mjs";
|
||||
import { toBase64 } from "../lib/Base64.mjs";
|
||||
|
||||
import * as wavefile from "wavefile";
|
||||
import { RFFT } from "dsp.js";
|
||||
|
||||
/**
|
||||
* Generate Spectrogram operation
|
||||
*/
|
||||
class GenerateSpectrogram extends Operation {
|
||||
|
||||
/**
|
||||
* GenerateSpectrogram constructor
|
||||
*/
|
||||
constructor() {
|
||||
super();
|
||||
|
||||
this.name = "Generate Spectrogram";
|
||||
this.module = "Default";
|
||||
this.description = "Generates a spectrogram from a wave file.<br /><br /><code>Frame size</code> - the number of samples process at once by FFT.<br /><code>Overlap</code> - the number of samples to overlap between frames.<br /><code>Color scheme</code> - the color scheme to use.<br /><code>Gain (dB)</code> - gain in decibels.<br /><code>Channel</code> - the channel to use.<br /><code>Include axes</code> - whether to include axes and labels on the rendered image.";
|
||||
this.infoURL = "https://en.wikipedia.org/wiki/Spectrogram";
|
||||
this.inputType = "string";
|
||||
this.outputType = "byteArray";
|
||||
this.presentType = "html";
|
||||
this.args = [
|
||||
{
|
||||
"name": "Frame size",
|
||||
"type": "option",
|
||||
"value": [
|
||||
"256",
|
||||
"64",
|
||||
"128",
|
||||
"512",
|
||||
"1024",
|
||||
"2048"
|
||||
]
|
||||
},
|
||||
{
|
||||
"name": "Overlap",
|
||||
"type": "option",
|
||||
"value": [
|
||||
"0%",
|
||||
"50%"
|
||||
]
|
||||
},
|
||||
{
|
||||
"name": "Color scheme",
|
||||
"type": "option",
|
||||
"value": [
|
||||
"Green-Black",
|
||||
"Yellow-Blue",
|
||||
"Greyscale",
|
||||
"Neon"
|
||||
]
|
||||
},
|
||||
{
|
||||
"name": "Gain (dB)",
|
||||
"type": "number",
|
||||
"value": 0,
|
||||
"min": -100,
|
||||
"max": 100
|
||||
},
|
||||
{
|
||||
"name": "Channel",
|
||||
"type": "number",
|
||||
"value": 0,
|
||||
"min": 0
|
||||
},
|
||||
{
|
||||
"name": "Include axes",
|
||||
"type": "boolean",
|
||||
"value": true
|
||||
}
|
||||
];
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {string} input
|
||||
* @param {Object[]} args
|
||||
* @returns {byteArray} the sound file as bytes
|
||||
*/
|
||||
run(input, args) {
|
||||
input = Utils.strToByteArray(input);
|
||||
|
||||
// Determine file type
|
||||
if (!isType(/^(audio)/, input)) {
|
||||
throw new OperationError("Invalid or unrecognised file type");
|
||||
}
|
||||
|
||||
return input;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the spectrogram html
|
||||
* @param {array} array of arrays of samples
|
||||
* @param {number} sampleRate
|
||||
* @param {Object[]} args
|
||||
* @returns {string} HTML
|
||||
*/
|
||||
async getSpectrogram(sampleChannels, sampleRate, args) {
|
||||
/* args */
|
||||
const frameSize = parseInt(args[0], 10);
|
||||
const overlap = (parseInt(args[1], 10) / 100) * frameSize;
|
||||
const colorScheme = args[2];
|
||||
const gain = args[3];
|
||||
const channelNum = args[4];
|
||||
const includeAxes = args[5];
|
||||
|
||||
if (sampleChannels[channelNum] == null) {
|
||||
throw new OperationError(`Invalid channel number: ${channelNum}`);
|
||||
}
|
||||
|
||||
const channel = sampleChannels[channelNum];
|
||||
const MAX_FREQ = sampleRate / 2;
|
||||
|
||||
/* positions and sizes */
|
||||
let paddingLeft = 0;
|
||||
let paddingRight = 0;
|
||||
let paddingBottom = 0;
|
||||
if (includeAxes) {
|
||||
paddingLeft = Math.log10(MAX_FREQ) * 10 + 10 * 3; // space for the frequency labels (10px per digit)
|
||||
paddingRight = 50;
|
||||
paddingBottom = 20;
|
||||
}
|
||||
|
||||
const width = channel.length / (frameSize - overlap);
|
||||
const height = frameSize / 2;
|
||||
|
||||
const imageWidth = width + paddingLeft + paddingRight;
|
||||
const imageHeight = height + paddingBottom;
|
||||
|
||||
/* create an image */
|
||||
const image = new jimp(imageWidth, imageHeight, (err, image) => {});
|
||||
if (isWorkerEnvironment())
|
||||
self.sendStatusMessage("Generating a spectrogram from data...");
|
||||
|
||||
/**
|
||||
* Returns a function filling a pixel with given color
|
||||
* @param {array<number>} rgba
|
||||
* @returns function
|
||||
*/
|
||||
function fill(rgba) {
|
||||
return function(x, y, idx) {
|
||||
this.bitmap.data[idx + 0] = rgba[0];
|
||||
this.bitmap.data[idx + 1] = rgba[1];
|
||||
this.bitmap.data[idx + 2] = rgba[2];
|
||||
this.bitmap.data[idx + 3] = rgba[3];
|
||||
};
|
||||
}
|
||||
|
||||
/* fill with black */
|
||||
image.scan(0, 0, image.bitmap.width, image.bitmap.height, fill([0, 0, 0, 255]).bind(image));
|
||||
|
||||
if (includeAxes) {
|
||||
/* draw border */
|
||||
image.scan(paddingLeft - 1, height + 1, width + 2, 1, fill([255, 255, 255, 255]).bind(image)); // horizontal
|
||||
image.scan(paddingLeft - 1, 0, 1, height + 1, fill([255, 255, 255, 255]).bind(image)); // vertical (left)
|
||||
image.scan(paddingLeft + width + 1, 0, 1, height + 1, fill([255, 255, 255, 255]).bind(image)); // vertical (right)
|
||||
|
||||
/* set font */
|
||||
const font = await import(/* webpackMode: "eager" */ "../../web/static/fonts/bmfonts/Roboto72White.fnt");
|
||||
await import(/* webpackMode: "eager" */ "../../web/static/fonts/bmfonts/Roboto72White.png");
|
||||
|
||||
/* LoadFont needs an absolute url, so append the font name to self.docURL */
|
||||
const jimpFont = await jimp.loadFont(self.docURL + "/" + font.default);
|
||||
|
||||
/* create a temporary scaled image */
|
||||
const textScale = 72 / 10;
|
||||
const textImage = new jimp(image.bitmap.width * textScale, image.bitmap.height * textScale, (err, image) => {});
|
||||
|
||||
/* write min and max frequency */
|
||||
textImage.print(jimpFont, /* align to right */ (paddingLeft - 30) * textScale, (height - 10) * textScale, "0 Hz");
|
||||
textImage.print(jimpFont, /* align to right */ (paddingLeft - (Math.log10(MAX_FREQ) + 1) * 10) * textScale, 5 * textScale, `${(MAX_FREQ).toFixed(0)} Hz`);
|
||||
|
||||
/* write min and max time */
|
||||
textImage.print(jimpFont, (paddingLeft - 5) * textScale, (height + 5) * textScale, "0 s");
|
||||
textImage.print(jimpFont, (paddingLeft + width) * textScale, (height + 5) * textScale, `${(channel.length / sampleRate).toFixed(0)} s`);
|
||||
|
||||
/* draw the scaled image on the original image */
|
||||
textImage.scaleToFit(image.bitmap.width, image.bitmap.height);
|
||||
image.blit(textImage, 0, 0);
|
||||
}
|
||||
|
||||
const rfft = new RFFT(frameSize, sampleRate);
|
||||
|
||||
const frames = [];
|
||||
for (let start = 0; start < channel.length; start += (frameSize - overlap)) {
|
||||
let chunk = channel.slice(start, start+frameSize);
|
||||
|
||||
if (chunk.length < frameSize) {
|
||||
/* pad with zeros */
|
||||
const pad = new Float64Array(frameSize - chunk.length).fill(0);
|
||||
chunk = Float64Array.from([...chunk, ...pad]);
|
||||
}
|
||||
|
||||
/* get frequency spectrum */
|
||||
const freq = rfft.forward(chunk);
|
||||
const frame = [];
|
||||
for (let i = 0; i < freq.length; i++) {
|
||||
/* convert to decibels */
|
||||
let strength = 10 * Math.log10(Math.abs(freq[i])) + gain;
|
||||
|
||||
if (freq[i] === 0) // avoid -Infinity
|
||||
strength = 0;
|
||||
|
||||
if (strength < 0)
|
||||
strength = 0;
|
||||
|
||||
frame.push(strength);
|
||||
}
|
||||
frames.push(frame);
|
||||
}
|
||||
|
||||
/* normalize */
|
||||
let max = 0;
|
||||
for (let i = 0; i < frames.length; i++) {
|
||||
for (let j = 0; j < frames[i].length; j++) {
|
||||
if (frames[i][j] > max)
|
||||
max = frames[i][j];
|
||||
}
|
||||
}
|
||||
|
||||
/* draw */
|
||||
let posX = paddingLeft;
|
||||
for (let i = 0; i < frames.length; i++) {
|
||||
for (let j = 0; j < frames[i].length; j++) {
|
||||
const colorStrength = (frames[i][j] / max) * 255;
|
||||
let color;
|
||||
|
||||
switch (colorScheme) {
|
||||
case "Green-Black":
|
||||
color = [0, colorStrength, 0, 255];
|
||||
break;
|
||||
case "Greyscale":
|
||||
color = [colorStrength, colorStrength, colorStrength, 255];
|
||||
break;
|
||||
case "Yellow-Blue":
|
||||
color = [colorStrength, colorStrength, Math.abs(50 - colorStrength), 255];
|
||||
break;
|
||||
case "Neon":
|
||||
color = [Math.sin(colorStrength/255) * 255, 0, Math.tanh(colorStrength) * 255, 255];
|
||||
break;
|
||||
default:
|
||||
throw new OperationError(`Unknown color scheme: ${colorScheme}`);
|
||||
}
|
||||
|
||||
image.scan(posX, height - j, 1, 1, fill(color).bind(image));
|
||||
}
|
||||
posX++;
|
||||
}
|
||||
|
||||
/* get image data */
|
||||
let imageBuffer;
|
||||
try {
|
||||
imageBuffer = await image.getBufferAsync(jimp.MIME_PNG);
|
||||
} catch (err) {
|
||||
throw new OperationError(`Error generating image. (${err})`);
|
||||
}
|
||||
|
||||
return `<img src="data:image/png;base64,${toBase64(imageBuffer)}" />`;
|
||||
}
|
||||
|
||||
/**
|
||||
* Displays a spectrogram
|
||||
*
|
||||
* @param {byteArray} data containing the audio file
|
||||
* @returns {string} HTML
|
||||
*/
|
||||
async present(data, args) {
|
||||
if (!data.length) return "";
|
||||
|
||||
// check file type
|
||||
const types = detectFileType(data);
|
||||
if (types[0].mime !== "audio/wav" && types[0].mime !== "audio/x-wav") {
|
||||
throw new OperationError("Only WAV files are supported");
|
||||
}
|
||||
|
||||
// parse wave
|
||||
let wave;
|
||||
try {
|
||||
wave = new wavefile.WaveFile(data);
|
||||
} catch (err) {
|
||||
throw new OperationError("Invalid WAV file");
|
||||
}
|
||||
|
||||
// get properties
|
||||
const numChannels = wave.fmt.numChannels;
|
||||
const sampleRate = wave.fmt.sampleRate;
|
||||
|
||||
// get samples
|
||||
let sampleChannels = [];
|
||||
if (numChannels > 1) {
|
||||
sampleChannels = wave.getSamples(); // returns an array of arrays
|
||||
} else {
|
||||
sampleChannels.push(wave.getSamples()); // returns an array
|
||||
}
|
||||
|
||||
// get the spectrogram html
|
||||
return this.getSpectrogram(sampleChannels, sampleRate, args);
|
||||
}
|
||||
}
|
||||
|
||||
export default GenerateSpectrogram;
|
||||
Loading…
Add table
Add a link
Reference in a new issue