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在页面左上角添加一个浮窗，通过填写的数值来控制网页上所有视频/音频的播放速度，并拦截 JS 时间引擎以加速 Unity/Canvas 游戏。新增F7暂停/恢复、F5重置、F6加速功能，UI已添加按键提示。
// ==UserScript==
// @name 通用网页视频倍速控制器
// @namespace http://tampermonkey.net/
// @version 1.3
// @description 在页面左上角添加一个浮窗，通过填写的数值来控制网页上所有视频/音频的播放速度，并拦截 JS 时间引擎以加速 Unity/Canvas 游戏。新增F7暂停/恢复、F5重置、F6加速功能，UI已添加按键提示。
// @author Gemini
// @match *://*/*
// @grant none
// @run-at document-start
// @license CC
// ==/UserScript==
(function() {
'use strict';
// --- 全局配置 ---
let currentSpeed = 1.0;
let isPaused = false; // 新增：暂停状态
// --- 时间劫持引擎 (针对 Unity/Canvas/JS 游戏) ---
// 保存原生方法引用
const nativeDateNow = Date.now;
const nativePerformanceNow = performance.now.bind(performance);
const nativeRequestAnimationFrame = window.requestAnimationFrame;
// 时间累加器
let lastRealTime = nativePerformanceNow();
let virtualTime = lastRealTime;
// 核心更新逻辑：计算虚拟时间
function updateVirtualTime() {
// 暂停状态下不更新虚拟时间
if (isPaused) {
return;
}
const realNow = nativePerformanceNow();
const dt = realNow - lastRealTime;
// 如果速度不为1，则应用倍率；否则保持同步防止漂移
if (currentSpeed !== 1.0) {
virtualTime += dt * currentSpeed;
} else {
virtualTime += dt;
}
lastRealTime = realNow;
}
// 劫持 performance.now
// Unity 及其它游戏引擎主要依赖此 API 计算 deltaTime
Object.defineProperty(performance, 'now', {
value: function() {
updateVirtualTime();
return virtualTime;
},
configurable: true,
writable: true
});
// 劫持 Date.now
// 部分老旧逻辑或服务器同步可能用到
Date.now = function() {
updateVirtualTime();
// 基准时间 + 虚拟流逝时间
return Math.floor(nativeDateNow() + (virtualTime - nativePerformanceNow()));
};
// 劫持 requestAnimationFrame
// 确保回调函数接收到的 timestamp 参数也是加速后的
window.requestAnimationFrame = function(callback) {
return nativeRequestAnimationFrame(function(timestamp) {
updateVirtualTime();
// 将虚拟时间传递给回调
callback(virtualTime);
});
};
// --- 新增功能：时间控制 ---
function togglePause() {
isPaused = !isPaused;
if (isPaused) {
// 暂停时，保持虚拟时间不变
lastRealTime = nativePerformanceNow();
statusMsg.innerText = `已暂停 (JS+媒体)`;
statusMsg.style.color = '#FF9800';
} else {
// 恢复时，重置基准时间
lastRealTime = nativePerformanceNow();
virtualTime = nativePerformanceNow();
statusMsg.innerText = `当前: ${currentSpeed}x (JS+媒体)`;
statusMsg.style.color = '#81C784';
}
}
function resetTime() {
isPaused = false;
lastRealTime = nativePerformanceNow();
virtualTime = nativePerformanceNow();
currentSpeed = 1.0;
speedInput.value = 1.0;
applyMediaSpeed(1.0);
statusMsg.innerText = '已重置 (1.0x)';
statusMsg.style.color = '#aaa';
}
function increaseTime() {
if (isPaused) {
return;
}
currentSpeed *= 5;
if (currentSpeed > 100) currentSpeed = 100; // 防止过大
speedInput.value = currentSpeed;
applyMediaSpeed(currentSpeed);
statusMsg.innerText = `当前: ${currentSpeed}x (JS+媒体)`;
statusMsg.style.color = '#81C784';
}
// --- UI 界面构建 (等待 DOM 就绪) ---
function initUI() {
// 创建 UI 界面
const panel = document.createElement('div');
panel.style.cssText = `
position: fixed;
top: 20px;
left: 20px;
z-index: 2147483647; /* 确保最高层级 */
background-color: rgba(0, 0, 0, 0.8);
color: white;
padding: 10px;
border-radius: 8px;
font-family: Arial, sans-serif;
font-size: 14px;
box-shadow: 0 4px 6px rgba(0,0,0,0.1);
display: flex;
flex-direction: column;
gap: 5px;
transition: opacity 0.3s;
opacity: 0.3;
pointer-events: auto;
`;
panel.onmouseenter = () => { panel.style.opacity = '1'; };
panel.onmouseleave = () => { panel.style.opacity = '0.3'; };
const title = document.createElement('div');
title.innerText = '⚡ 全局加速';
title.style.fontWeight = 'bold';
title.style.marginBottom = '5px';
const inputContainer = document.createElement('div');
inputContainer.style.display = 'flex';
inputContainer.style.alignItems = 'center';
inputContainer.style.gap = '5px';
const speedInput = document.createElement('input');
speedInput.type = 'number';
speedInput.value = currentSpeed;
speedInput.step = 0.1;
speedInput.style.width = '60px';
speedInput.style.padding = '4px';
speedInput.style.borderRadius = '4px';
speedInput.style.border = 'none';
speedInput.style.color = '#333';
const setBtn = document.createElement('button');
setBtn.innerText = '应用';
setBtn.style.padding = '4px 8px';
setBtn.style.cursor = 'pointer';
setBtn.style.backgroundColor = '#4CAF50';
setBtn.style.color = 'white';
setBtn.style.border = 'none';
setBtn.style.borderRadius = '4px';
const resetBtn = document.createElement('button');
resetBtn.innerText = '重置';
resetBtn.style.padding = '4px 8px';
resetBtn.style.cursor = 'pointer';
resetBtn.style.backgroundColor = '#f44336';
resetBtn.style.color = 'white';
resetBtn.style.border = 'none';
resetBtn.style.borderRadius = '4px';
resetBtn.style.marginTop = '5px';
const statusMsg = document.createElement('div');
statusMsg.style.fontSize = '12px';
statusMsg.style.color = '#aaa';
statusMsg.style.marginTop = '5px';
statusMsg.innerText = '当前: 1.0x';
// 新增按键提示
const keyHint = document.createElement('div');
keyHint.style.fontSize = '10px';
keyHint.style.color = '#aaa';
keyHint.style.marginTop = '2px';
keyHint.innerText = 'F7: 暂停/恢复 | F5: 重置 | F6: 5倍加速';
inputContainer.appendChild(speedInput);
inputContainer.appendChild(setBtn);
panel.appendChild(title);
panel.appendChild(inputContainer);
panel.appendChild(resetBtn);
panel.appendChild(statusMsg);
panel.appendChild(keyHint); // 添加按键提示
document.body.appendChild(panel);
// --- 逻辑绑定 ---
function applyMediaSpeed(speed) {
// 针对传统 <video> 和 <audio>
const mediaElements = document.querySelectorAll('video, audio');
let count = 0;
mediaElements.forEach(media => {
media.playbackRate = speed;
count++;
});
return count;
}
function updateSpeed() {
const val = parseFloat(speedInput.value);
if (!isNaN(val) && val > 0) {
// 更新全局倍速变量 (影响 JS/Unity)
// 重置基准时间，防止跳变过大
updateVirtualTime();
currentSpeed = val;
// 应用到媒体标签
const count = applyMediaSpeed(currentSpeed);
statusMsg.innerText = `当前: ${currentSpeed}x (JS+媒体)`;
statusMsg.style.color = '#81C784';
} else {
alert("请输入有效的数字！");
}
}
setBtn.onclick = updateSpeed;
speedInput.addEventListener('keypress', (e) => {
if (e.key === 'Enter') updateSpeed();
});
resetBtn.onclick = () => {
updateVirtualTime();
currentSpeed = 1.0;
speedInput.value = 1.0;
applyMediaSpeed(1.0);
statusMsg.innerText = '当前: 1.0x';
statusMsg.style.color = '#aaa';
};
// --- 新增功能：键盘控制 ---
document.addEventListener('keydown', function(event) {
if (event.key === 'F7') {
event.preventDefault();
togglePause();
} else if (event.key === 'F5') {
event.preventDefault();
resetTime();
} else if (event.key === 'F6') {
event.preventDefault();
increaseTime();
}
});
// 自动维护循环 (媒体标签)
setInterval(() => {
if (currentSpeed !== 1.0) {
applyMediaSpeed(currentSpeed);
}
}, 1000);
}
// --- 初始化 ---
// 尽可能早地劫持时间，但 UI 需要等待 body 加载
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', initUI);
} else {
initUI();
}
})();