8D - Panning audio

This script will pan the audio left to right to make the sound look moving around you!

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey 篡改猴Greasemonkey 油猴子Violentmonkey 暴力猴,才能安装此脚本。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey 篡改猴,才能安装此脚本。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey 篡改猴Violentmonkey 暴力猴,才能安装此脚本。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey 篡改猴Userscripts ,才能安装此脚本。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey 篡改猴,才能安装此脚本。

您需要先安装一款用户脚本管理器扩展后才能安装此脚本。

(我已经安装了用户脚本管理器,让我安装!)

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

(我已经安装了用户样式管理器,让我安装!)

// ==UserScript==
// @name         8D - Panning audio
// @namespace    http://tampermonkey.net/
// @version      0.4
// @description  This script will pan the audio left to right to make the sound look moving around you! 
// @author       Moreless
// @match        *://*/*
// @icon         http://example.com
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    const result = new Map()
    function update_players() {
        for (const el of document.querySelectorAll('video, audio')) {
            if (!el.hasAttribute('data-8dscript')) {
                el.setAttribute('data-8dscript', Math.random().toString(36).substr(2, 10))
            }
            result.set(el.getAttribute('data-8dscript'), {
                type: el.tagName.toLowerCase(),
                settings: el.xSoundFixerSettings
            })
        }
    }

    update_players();
    setInterval(update_players, 5000)

    var current_pan = 0;
    var direction = 1;
    var sidepause = false;
    var jumpmode = false;

    function pan_pause(duration) {
        sidepause = true;
        setTimeout(function() { sidepause=false; }, duration);
    }

    setInterval(function() {
        for (const [elid, el] of result) {
            if(jumpmode) {
                current_pan = current_pan == 0.6 ? -0.6 : 0.6;
                applySettings(elid, { pan: current_pan});
            } else {
                if(sidepause) return false;
                if (direction === 1) {
                    current_pan += 0.02;
                    if (current_pan > 0.8) { direction = 0; pan_pause(1500); }
                } else{
                    current_pan -= 0.02;
                    if (current_pan < -0.8){ direction = 1; pan_pause(1500); }
                }
                applySettings(elid, { pan: current_pan, gain: 1 + Math.abs(current_pan) / 3});
            }
        }
    }, 150);

    function applySettings (elid, newSettings) {
        var el = document.querySelector('[data-8dscript="' + elid + '"]')
        if (!el.xSoundFixerContext) {
            el.xSoundFixerContext = new AudioContext()
            el.xSoundFixerGain = el.xSoundFixerContext.createGain()
            el.xSoundFixerPan = el.xSoundFixerContext.createStereoPanner()
            el.xSoundFixerSplit = el.xSoundFixerContext.createChannelSplitter(2)
            el.xSoundFixerMerge = el.xSoundFixerContext.createChannelMerger(2)
            el.xSoundFixerSource = el.xSoundFixerContext.createMediaElementSource(el)
            el.xSoundFixerSource.connect(el.xSoundFixerGain)
            el.xSoundFixerGain.connect(el.xSoundFixerPan)
            el.xSoundFixerPan.connect(el.xSoundFixerContext.destination)
            el.xSoundFixerOriginalChannels = el.xSoundFixerContext.destination.channelCount
        }
        if (newSettings.gain) {
            el.xSoundFixerGain.gain.value = newSettings.gain
        }
        if (newSettings.pan) {
            el.xSoundFixerPan.pan.value = newSettings.pan
        }
        if ('mono' in newSettings) {
            el.xSoundFixerContext.destination.channelCount = newSettings.mono ? 1 : el.xSoundFixerOriginalChannels
        }
        if ('flip' in newSettings) {
            el.xSoundFixerFlipped = newSettings.flip
            el.xSoundFixerMerge.disconnect()
            el.xSoundFixerPan.disconnect()
            if (el.xSoundFixerFlipped) {
                el.xSoundFixerPan.connect(el.xSoundFixerSplit)
                el.xSoundFixerSplit.connect(el.xSoundFixerMerge, 0, 1)
                el.xSoundFixerSplit.connect(el.xSoundFixerMerge, 1, 0)
                el.xSoundFixerMerge.connect(el.xSoundFixerContext.destination)
            } else {
                el.xSoundFixerPan.connect(el.xSoundFixerContext.destination)
            }
        }
        el.xSoundFixerSettings = {
            gain: el.xSoundFixerGain.gain.value,
            pan: el.xSoundFixerPan.pan.value,
            mono: el.xSoundFixerContext.destination.channelCount == 1,
            flip: el.xSoundFixerFlipped,
        }
    }


})();