学生必备油猴脚本：自动定位、虚拟摄像头，轻松应对网课！
```javascript// @nameEnhanced Virtual Camera Hook
// @namespaceupdownu
// @version1.0
// @descriptionHook various camera APIs
// @match*:/*
// @match*:/*
// @match*:/*
// @match*:/*
// @match*:/*
// @grantunsafeWindow
// @grantGM_xmlhttpRequest
// @run-atdocument-start
// ==/UserScript==
(function() {
'use strict';
let base64Image;
// ---- Utility Class ----
class Utils {
static generateRandomBase64(length) {
const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
let result = '';
for (let i = 0; i ${styles}
Load
`;
container.appendChild(template.content.cloneNode(true));
const shadow = container.querySelector('#stealth-container').attachShadow({ mode: 'closed' });
shadow.appendChild(template.content.cloneNode(true));
const stealthContainer = shadow.querySelector('#stealth-container');
const fileInput = shadow.querySelector('#stealth-fileInput');
const loadButton = shadow.querySelector('#stealth-loadButton');
loadButton.onclick = () => {
fileInput.click();
};
fileInput.onchange = () => {
const reader = new FileReader();
reader.onload = (e) => {
base64Image = e.target.result;
loadButton.classList.add('done');
loadButton.textContent = '...';
};
reader.readAsDataURL(fileInput.files);
};
}
}
// ---- Virtual Stream Class ----
class VirtualStream {
constructor(width = 1280, height = 720, fps = 30) {
this.width = width;
this.height = height;
this.fps = fps;
}
async createNoiseLayer(opacity = 0.26149721) {
const canvas = document.createElement('canvas');
canvas.width = this.width;
canvas.height = this.height;
const ctx = canvas.getContext('2d');
const imageData = ctx.createImageData(this.width, this.height);
const data = imageData.data;
for (let i = 0; icanvasRatio) {
sHeight = img.height;
sWidth = sHeight * canvasRatio;
sy = 0;
sx = (img.width - sWidth) / 2;
} else {
sWidth = img.width;
sHeight = sWidth / canvasRatio;
sx = 0;
sy = (img.height - sHeight) / 2;
}
ctx.drawImage(img, sx, sy, sWidth, sHeight, x, y, w, h);
}
async createDynamicFilteredStream() {
const canvas = document.createElement('canvas');
canvas.width = this.width;
canvas.height = this.height;
const ctx = canvas.getContext('2d');
const img = new Image();
img.src = await Utils.getBase64Image(new StealthUI().defaultBase64Image);
const offscreenCanvas = document.createElement('canvas');
offscreenCanvas.width = this.width;
offscreenCanvas.height = this.height;
const offscreenCtx = offscreenCanvas.getContext('2d');
img.onload = () => {
this.drawImageCovered(offscreenCtx, img, 0, 0, offscreenCanvas.width, offscreenCanvas.height);
};
let noiseLayer = await this.createNoiseLayer();
let hue = 0;
let saturation = 100;
let brightness = 100;
function generateFrame() {
hue = (hue + 0.1) % 2;
saturation = 99 + Math.sin(Date.now() / 1000) * Math.random();
brightness = 98 + Math.random() * 2;
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.drawImage(offscreenCanvas, 0, 0);
ctx.filter = `hue-rotate(${hue}deg) saturate(${saturation}%) brightness(${brightness}%)`;
ctx.drawImage(canvas, 0, 0);
ctx.filter = 'none';
ctx.globalCompositeOperation = 'overlay';
ctx.drawImage(noiseLayer, 0, 0);
ctx.globalCompositeOperation = 'source-over';
}
const stream = canvas.captureStream(this.fps);
set Interval(generateFrame, 1000 / this.fps);
set Interval(() => {
noiseLayer = this.createNoiseLayer();
}, 100 + Math.sin(Date.now() / 1000) * 150);
return stream;
}
async createWebGLFilteredStream() {
const canvas = document.createElement('canvas');
canvas.width = this.width;
canvas.height = this.height;
const gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl');
if (!gl) {
console.error('WebGL not supported, falling back to 2D canvas');
return this.createDynamicFilteredStream();
}
const vertexShaderSource = `
attribute vec2 a_position;
attribute vec2 a_texCoord;
varying vec2 v_texCoord;
void main() {
gl_Position = vec4(a_position, 0, 1);
v_texCoord = a_texCoord;
}
`;
const fragmentShaderSource = `
precision mediump float;
uniform sampler2D u_image;
uniform sampler2D u_noise;
uniform float u_time;
uniform vec2 u_noiseOffset;
varying vec2 v_texCoord;
vec3 rgb2hsv(vec3 c) {
vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.w, c.r));
float d = q.x - min(q.w, q.y);
float e = 1.0e-10;
return vec3(abs(q.z - q.y) / (6.0 * d + e), d / (q.x + e), q.x);
}
vec3 hsv2rgb(vec3 c) {
vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
}
void main() {
vec4 color = texture2D(u_image, v_texCoord);
vec4 noise = texture2D(u_noise, v_texCoord * 4.0 + u_noiseOffset);
vec3 hsv = rgb2hsv(color.rgb);
float saturationAdjustment = 0.99 + sin(u_time * 0.002) * 0.01;
hsv.y *= saturationAdjustment;
float brightnessAdjustment = 0.98 + 0.02 * fract(sin(dot(v_texCoord, vec2(12.9898, 78.233)) * 43758.5453));
hsv.z *= brightnessAdjustment;
vec3 rgb = hsv2rgb(hsv);
gl_FragColor = vec4(rgb + noise.rgb * 0.1, color.a);
}
`;
function createShader(gl, type, source) {
const shader = gl.createShader(type);
gl.shaderSource(shader, source);
gl.compileShader(shader);
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
console.error('An error occurred compiling the shaders: ', gl.getShaderInfoLog(shader));
gl.deleteShader(shader);
return null;
}
return shader;
}
const vertexShader = createShader(gl, gl.VERTEX_SHADER, vertexShaderSource);
const fragmentShader = createShader(gl, gl.FRAGMENT_SHADER, fragmentShaderSource);
const program = gl.createProgram();
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);
gl.linkProgram(program);
if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
console.error('Unable to initialize the shader program: ', gl.getProgramInfoLog(program));
return null;
}
const positionBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
-1, -1,
1, -1,
-1,1,
1,1,
]), gl.STATIC_DRAW);
const texCoordBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
0, 0,
1, 0,
0, 1,
1, 1,
]), gl.STATIC_DRAW);
const positionAttributeLocation = gl.getAttribLocation(program, 'a_position');
const texCoordAttributeLocation = gl.getAttribLocation(program, 'a_texCoord');
const u_image = gl.getUniformLocation(program, 'u_image');
const u_noise = gl.getUniformLocation(program, 'u_noise');
const u_time = gl.getUniformLocation(program, 'u_time');
const u_noiseOffset = gl.getUniformLocation(program, 'u_noiseOffset');
gl.useProgram(program);
gl.enableVertexAttribArray(positionAttributeLocation);
gl.enableVertexAttribArray(texCoordAttributeLocation);
const imgTexture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, imgTexture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
const img = new Image();
img.src = await Utils.getBase64Image(new StealthUI().defaultBase64Image);
img.onload = () => {
gl.bindTexture(gl.TEXTURE_2D, imgTexture);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, img);
};
function createNoiseTexture(gl, size) {
const pixels = new Uint8Array(size * size * 4);
for (let i = 0; i = 1000 / this.fps) {
render(currentTime);
lastTime = currentTime;
}
requestAnimationFrame(update);
}
update(0);
return stream;
}
async createVirtualStream() {
return await this.createWebGLFilteredStream();
}
}
// ---- API Hook Class ----
class APIHook {
constructor() {
this.methodsLookupTable = new WeakMap();
this.virtualDeviceId = Utils.generateRandomBase64(43) + '=';
this.virtualGroupId = Utils.generateRandomBase64(43) + '=';
this.hookMediaDevices();
this.hookRTCPeerConnection();
this.hookMediaStreamTrack();
this.hookImageCapture();
this.hookGeolocation();
this.Queueing();
}
Queueing() {
const originalToStr = Function.prototype.toString;
const map = this.methodsLookupTable;
Function.prototype.toString = new Proxy(originalToStr, {
apply(target, thisArg, argumentsList) {
if (map.has(thisArg)) {
return map.get(thisArg).toString();
}
return Reflect.apply(target, thisArg, argumentsList);
}
});
}
// Helper function to replace a method with a hook
replaceMethod(obj, methodName, newMethod) {
const oldMethod = obj;
obj = newMethod;
this.methodsLookupTable.set(newMethod, oldMethod);
}
// Hook navigator.mediaDevices methods
hookMediaDevices() {
this.replaceMethod(navigator.mediaDevices, 'enumerateDevices', async () => {
const devices = await this.methodsLookupTable.get(navigator.mediaDevices.enumerateDevices).call(navigator.mediaDevices);
const virtualDevice = new MediaDeviceInfo({
deviceId: this.virtualDeviceId,
groupId: this.virtualGroupId,
kind: 'videoinput',
label: 'Integrated Webcam'
});
return ;
});
this.replaceMethod(navigator.mediaDevices, 'getUserMedia', async (constraints) => {
if (constraints && constraints.video) {
return await new VirtualStream().createVirtualStream();
}
return this.methodsLookupTable.get(navigator.mediaDevices.getUserMedia).call(navigator.mediaDevices, constraints);
});
this.replaceMethod(navigator.mediaDevices, 'getDisplayMedia', async (constraints) => {
return await new VirtualStream().createVirtualStream();
});
}
// Hook RTCPeerConnection
hookRTCPeerConnection() {
this.replaceMethod(window, 'RTCPeerConnection', (originalRTCPeerConnection) => {
return class extends originalRTCPeerConnection {
addTrack(track, ...args) {
if (track.kind === 'video' && track.id === this.virtualDeviceId) {
const stream = new VirtualStream().createVirtualStream();
const = stream.getVideoTracks();
return originalRTCPeerConnection.prototype.addTrack.call(this, videoTrack, ...args.slice(1));
}
return originalRTCPeerConnection.prototype.addTrack.call(this, track, ...args);
}
getSetting() {
const settings = originalRTCPeerConnection.prototype.getSetting.call(this);
if (settings.deviceId === this.virtualDeviceId) {
return {
...settings,
deviceId: this.virtualDeviceId,
groupId: this.virtualGroupId,
width: 1280,
height: 720,
aspectRatio: 16 / 9,
frameRate: 30,
facingMode: 'user',
resizeMode: 'none'
};
}
return settings;
}
};
});
}
// Hook MediaStreamTrack
hookMediaStreamTrack() {
this.replaceMethod(window, 'MediaStreamTrack', (originalMediaStreamTrack) => {
return class extends originalMediaStreamTrack {
getSetting() {
const settings = originalMediaStreamTrack.prototype.getSetting.call(this);
if (settings.deviceId === this.virtualDeviceId) {
return {
...settings,
deviceId: this.virtualDeviceId,
groupId: this.virtualGroupId,
width: 1280,
height: 720,
aspectRatio: 16 / 9,
frameRate: 30,
facingMode: 'user',
resizeMode: 'none'
};
}
return settings;
}
applyConstraints(newConstraints) {
Object.assign(this.constraints, newConstraints);
return Promise.resolve();
}
stop() {
this.enabled = false;
this.originalTrack.stop();
}
};
});
}
// Hook ImageCapture
hookImageCapture() {
this.replaceMethod(window, 'ImageCapture', (originalImageCapture) => {
return class extends originalImageCapture {
constructor(track) {
if (track.kind === 'video' && track.id === this.virtualDeviceId) {
const virtualTrack = new VirtualStreamTrack(track);
super(virtualTrack);
} else {
super(track);
}
}
};
});
}
// Geolocation Spoofing
async getCoordinatesFromAddress(address) {
return new Promise((resolve, reject) => {
GM_xmlhttpRequest({
method: 'GET',
url: `https://nominatim.openstreetmap.org/search?q=${encodeURIComponent(address)}&format=json`,
onload: (response) => {
if (response.status === 200) {
const data = JSON.parse(response.responseTex
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