### Implement Gesture Controls for Volume and Brightness (JavaScript, Java)

Source: https://context7.com/prateek-chaubey/ytpro/llms.txt

Provides touch gesture controls for adjusting volume and brightness during video playback. Uses JavaScript for swipe detection and UI feedback, and Java for system volume and screen brightness manipulation. Requires Android API level 26 or higher for brightness control.

```javascript
// script.js - Swipe gesture controls
var sens = 0.005; // Sensitivity
var vol = Android.getVolume();
var brt = Android.getBrightness() / 100;

// Create overlay controls for video container
var elStyle = {
    height: "100%",
    width: rect.width * 0.15 + "px",
    position: "absolute",
    top: "0px",
    opacity: "0"
};

var volElement = document.createElement("div");
volElement.setAttribute("id", "volS");
Object.assign(volElement.style, elStyle);
volElement.style.right = "0px";

var brtElement = document.createElement("div");
brtElement.setAttribute("id", "brtS");
Object.assign(brtElement.style, elStyle);
brtElement.style.left = "0px";

// Volume control event handler
volElement.addEventListener("touchmove", (e) => {
    e.preventDefault();
    volElement.style.opacity = "1";

    var diff = touchstartY - e.touches[0].pageY;
    vol += diff > 0 ? sens : -sens;
    vol = Math.max(0, Math.min(1, vol));

    touchstartY = e.touches[0].pageY;
    Android.setVolume(vol);
    document.getElementById("volIS").style.height = vol * 100 + "%"
}, { passive: false });

```

```java
// Java-side volume control
@JavascriptInterface
public void setVolume(float volume) {
    int max = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
    int targetVolume = (int) (max * volume);
    audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, targetVolume, 0);
}

// Brightness control (similar pattern)
@JavascriptInterface
public void setBrightness(final float brightnessValue){
    runOnUiThread(new Runnable() {
        public void run() {
            final float brightness = Math.max(0f, Math.min(brightnessValue, 1f));
            WindowManager.LayoutParams layout = getWindow().getAttributes();
            layout.screenBrightness = brightness;
            getWindow().setAttributes(layout);
        }
    });
}

```

--------------------------------

### Interact with Google Gemini AI for YouTube Summarization (JavaScript, Java)

Source: https://context7.com/prateek-chaubey/ytpro/llms.txt

This snippet demonstrates how to interact with the Google Gemini AI API to summarize YouTube videos. It handles user authentication, token retrieval, prompt construction, and making the API request. It also includes a Java-side handler for processing the HTTP request asynchronously.

```javascript
// script.js - Gemini API interaction
async function geminiInfo(){
    var cookies = Android.getAllCookies(window.location.href);

    // Check if user is signed in to Google
    if(cookies.indexOf("__Secure-1PSID=") < 0){
        GeminiRes.innerHTML = `<center>Sign in to use Gemini<br><br>
            <a href="https://accounts.google.com/ServiceLogin?service=youtube">
                <button>Sign In</button>
            </a></center>`;
        return;
    }

    // Get Gemini access token (SNlM0e)
    if(GeminiAT == ""){
        Android.getSNlM0e(secured);
        GeminiAT = await callbackSNlM0e();
    }

    // Build prompt with video context
    var prompt = localStorage.getItem('prompt')
        .replaceAll("{url}", window.location.href)
        .replaceAll("{videoId}", new URL(window.location.href).searchParams.get("v"))
        .replaceAll("{title}", document.getElementsByClassName('slim-video-metadata-header')[0].textContent);

    // Prepare Gemini request with chat history if enabled
    var chat = (localStorage.getItem("saveCInfo") == "true" &&
                localStorage.getItem("geminiChatInfo") != null) ?
                localStorage.getItem("geminiChatInfo").split(",") : null;

    const formData = new URLSearchParams();
    formData.append("f.req", JSON.stringify([null, JSON.stringify([[prompt], null, chat])]));
    formData.append("at", GeminiAT);

    // Make request through Java bridge
    var headers = JSON.stringify({
        "content-type": "application/x-www-form-urlencoded;charset=UTF-8",
        "x-goog-ext-525001261-jspb": GeminiModels[localStorage.getItem('geminiModel')],
        "x-same-domain": "1",
        "cookie": secured
    });

    Android.GeminiClient(
        "https://gemini.google.com/_/BardChatUi/data/assistant.lamda.BardFrontendService/StreamGenerate",
        headers,
        formData.toString()
    );

    var response = await callbackGeminiClient();
    handleGeminiResponse(response);
}

```

```java
// Java-side HTTP request handler
@JavascriptInterface
public void GeminiClient(String url, String headers, String body) {
    new Thread(() -> {
        JSONObject response = GeminiWrapper.getStream(url, headers, body);
        runOnUiThread(() -> web.evaluateJavascript(
            "callbackGeminiClient.resolve(" + response + ")", null));
    }).start();
}

```

--------------------------------

### Java: Android Video Download Manager Integration

Source: https://context7.com/prateek-chaubey/ytpro/llms.txt

Provides a Java method `downvid` to initiate video downloads on Android devices using the `DownloadManager` system service. This method takes the video name, URL, and MIME type as input. It configures the download request, sets the title, MIME type, destination directory (public downloads), and notification visibility, then enqueues the download. This method requires appropriate Android permissions for network access and storage.

```java
// Java bridge for actual download
@JavascriptInterface
public void downvid(String name, String url, String m) {
    DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
    DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
    request.setTitle(name)
        .setMimeType(m)
        .setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, encodedFileName)
        .setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
    downloadManager.enqueue(request);
}
```

--------------------------------

### Background Audio Playback with MediaSession Polyfill (JavaScript & Java)

Source: https://context7.com/prateek-chaubey/ytpro/llms.txt

Implements background audio playback for Android apps when the app is minimized. It uses a JavaScript polyfill for the MediaSession API and a Java-side foreground service to manage playback notifications and controls. Dependencies include the Android framework and DOM manipulation.

```javascript
// bgplay.js - MediaSession polyfill for background playback
if (!('mediaSession' in navigator)) {
    let _metadata = null;

    Object.defineProperty(navigator, 'mediaSession', {
        value: {},
        configurable: true
    });

    Object.defineProperty(navigator.mediaSession, 'metadata', {
        get() { return _metadata; },
        set(value) {
            bgPlay(value); // Trigger Android notification
            _metadata = value;
        }
    });

    navigator.mediaSession.setActionHandler = (action, handler) => {
        if (typeof handler === 'function') {
            handlers[action] = handler;
        }
    };
}

// Create foreground notification with media controls
async function bgPlay(info){
    if(!info) return;

    var ytproAud = document.getElementsByClassName('video-stream')[0];

    // Generate thumbnail from video frame
    var canvas = document.createElement('canvas');
    canvas.width = 160;
    canvas.height = 90;
    var context = canvas.getContext('2d');

    var img = new Image();
    img.crossOrigin = "anonymous";
    img.src = info?.artwork?.[0]?.src;
    await new Promise((res) => { img.onload = () => res(); });

    context.drawImage(img, 0, 0, 160, 90);
    iconBase64 = canvas.toDataURL('image/png', 1.0);

    // Start or update foreground service
    if(window.serviceRunning){
        setTimeout(() => {
            Android.bgUpdate(iconBase64.replace("data:image/png;base64,", ""),
                           info.title, info.artist, ytproAud.duration*1000);
        }, 50);
    } else {
        window.serviceRunning = true;
        setTimeout(() => {
            Android.bgStart(iconBase64.replace("data:image/png;base64,", ""),
                          info.title, info.artist, ytproAud.duration*1000);
        }, 50);
    }
}

```

```java
// Java-side foreground service
@JavascriptInterface
public void bgStart(String icon, String title, String subtitle, long duration) {
    Intent intent = new Intent(getApplicationContext(), ForegroundService.class);
    intent.putExtra("icon", icon);
    intent.putExtra("title", title);
    intent.putExtra("subtitle", subtitle);
    intent.putExtra("duration", duration);
    intent.putExtra("action", "play");
    startService(intent);
}

```

--------------------------------

### Implement Picture-in-Picture Mode for Video Playback (JavaScript, Java)

Source: https://context7.com/prateek-chaubey/ytpro/llms.txt

Enables video playback in a floating window using JavaScript for UI control and Java for Android's Picture-in-Picture API. Handles aspect ratio adjustments based on video orientation. Requires Android API level 26 or higher.

```javascript
// script.js - PIP mode controls
function PIPlayer(pip = false){
    var v = document.getElementsByClassName('video-stream')[0];

    if(pip){
        // Determine aspect ratio from video dimensions
        if(v.getBoundingClientRect().height > v.getBoundingClientRect().width){
            Android.pipvid("portrait"); // 9:16
        } else {
            Android.pipvid("landscape"); // 16:9
        }
        return;
    }

    // Enter fullscreen and prevent pause
    v.requestFullscreen();
    v.play();
    pauseAllowed = false;
    isPIP = true;
}

// Override pause function to prevent YouTube from stopping video in PIP
HTMLMediaElement.prototype.pause = function(){
    if (pauseAllowed || PIPause) {
        return originalPause.apply(this, arguments);
    }

    if (this.paused) {
        this.play().catch(() => {});
    }
};

```

```java
// Java-side PIP implementation
@JavascriptInterface
public void pipvid(String x) {
    if (android.os.Build.VERSION.SDK_INT >= 26) {
        PictureInPictureParams params;
        if (x.equals("portrait")) {
            params = new PictureInPictureParams.Builder()
                .setAspectRatio(new Rational(9, 16)).build();
        } else {
            params = new PictureInPictureParams.Builder()
                .setAspectRatio(new Rational(16, 9)).build();
        }
        enterPictureInPictureMode(params);
    }
}

```

--------------------------------

### YouTube Dislike Count Integration using JavaScript

Source: https://context7.com/prateek-chaubey/ytpro/llms.txt

This script fetches and displays YouTube video dislike counts by interacting with the Return YouTube Dislike API. It parses the video ID from the URL, makes an asynchronous request to the API, and formats the dislike count according to the user's locale.

```javascript
// script.js - Dislike counter
async function fDislikes(url){
    var Url = new URL(url);
    var vID = "";

    if(Url.pathname.indexOf("shorts") > -1){
        vID = Url.pathname.substr(8, Url.pathname.length);
    } else if(Url.pathname.indexOf("watch") > -1){
        vID = Url.searchParams.get("v");
    }

    fetch("https://returnyoutubedislikeapi.com/votes?videoId=" + vID)
    .then(response => response.json())
    .then(jsonObject => {
        if('dislikes' in jsonObject){
            dislikes = getDislikesInLocale(parseInt(jsonObject.dislikes));
        }
    }).catch(error => {});
}

// Format numbers based on user locale
function getDislikesInLocale(num){
    var nn = num;
    if (num < 1000){
        nn = num;
    } else {
        const int = Math.floor(Math.log10(num) - 2);
        const decimal = int + (int % 3 ? 1 : 0);
        const value = Math.floor(num / 10 ** decimal);
        nn = value * 10 ** decimal;
    }

    let userLocales = document.documentElement.lang || navigator.language || "en";

    return Intl.NumberFormat(userLocales, {
        notation: "compact",
        compactDisplay: "short",
    }).format(nn);
}

// Display in UI (runs continuously)
try{
    var elm = document.getElementsByTagName("dislike-button-view-model")[0].children[0];
    if(!document.getElementById("diskl")){
        var diskl = document.createElement("span");
        diskl.setAttribute("id", "diskl");
        diskl.innerHTML = dislikes;
        diskl.style.marginLeft = "5px";
        insertAfter(elm.getElementsByClassName("yt-spec-button-shape-next__icon")[0], diskl);
    } else {
        document.getElementById("diskl").innerHTML = dislikes;
    }
}catch(e){}

```

--------------------------------

### JavaScript: Fetch and Process YouTube Video Streams

Source: https://context7.com/prateek-chaubey/ytpro/llms.txt

Fetches video stream information from YouTube using the InnerTube API. It retrieves video IDs, deciphers obfuscated URLs, and handles adaptive streaming formats. Dependencies include `sig_sc`, `nsig_sc`, `poToken`, `cver`, `visitorData`, and `sig_timestamp` which are assumed to be globally available or previously defined. The function `getDownloadStreams` initiates the process, and `decipherUrl` is responsible for modifying URLs for download.

```javascript
// innertube.js - Complete download workflow
window.getDownloadStreams = async () => {
    write("Getting Deciphers...");
    await getDeciphers(); // Extract signature decipher functions

    write("Fetching Video Info...");
    var id = window.location.pathname.indexOf("shorts") > -1 ?
        window.location.pathname.substr(8) :
        new URLSearchParams(window.location.search).get("v");

    // Request video streams with PoToken authentication
    var body = {
        "videoId": id,
        "playbackContext": {
            "contentPlaybackContext": {
                "signatureTimestamp": sig_timestamp
            }
        },
        "serviceIntegrityDimensions": {
            "poToken": poToken
        },
        "context": {
            "client": {
                "clientName": "ANDROID",
                "clientVersion": "19.35.36",
                "visitorData": visitorData
            }
        }
    };

    var info = await fetch("https://m.youtube.com/youtubei/v1/player?prettyPrint=false", {
        method: "POST",
        body: JSON.stringify(body)
    }).then((res) => res.json());

    handleDownloadStreams(info);
};

// Decipher obfuscated URLs
function decipherUrl(url){
    const args = new URLSearchParams(url);
    const url_components = new URL(args.get('url') || url);

    // Decipher signature parameter if present
    if(args.get('s') != null){
        const signature = Utils.Platform.shim.eval(sig_sc, {
            sig: args.get('s')
        });
        url_components.searchParams.set(args.get('sp') || 'signature', signature);
    }

    // Decipher n-parameter (throttling)
    const n = url_components.searchParams.get('n');
    if(n != null){
        var nsig = Utils.Platform.shim.eval(nsig_sc, { nsig: n });
        url_components.searchParams.set('n', nsig);
    }

    // Add PoToken for authentication
    url_components.searchParams.set('pot', poToken);
    url_components.searchParams.set('cver', cver);

    return url_components.toString();
}
```

--------------------------------

### Inject JavaScript into WebView - Android (Java)

Source: https://context7.com/prateek-chaubey/ytpro/llms.txt

This code snippet demonstrates how to inject multiple JavaScript files into a WebView upon page completion. It's used in the MainActivity of the YT PRO Android application to load custom scripts that enhance the YouTube mobile web experience. These scripts enable features like ad blocking, background playback, and video downloading.

```java
package com.example.ytpro;

import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends WebViewActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // ... setup WebView ...
    }

    // Example of WebViewClient setup within MainActivity or a related class
    private class MyWebViewClient extends WebViewClient {
        @Override
        public void onPageFinished(WebView p1, String url) {
            // Enable Trusted Types policy for secure script injection
            web.evaluateJavascript("if (window.trustedTypes && window.trustedTypes.createPolicy && !window.trustedTypes.defaultPolicy) {window.trustedTypes.createPolicy('default', {createHTML: (string) => string,createScriptURL: string => string, createScript: string => string, });}",null);

            // Inject main feature script
            web.evaluateJavascript("(function () { var script = document.createElement('script'); script.src='https://youtube.com/ytpro_cdn/npm/ytpro'; document.body.appendChild(script);  })();",null);

            // Inject background playback script
            web.evaluateJavascript("(function () { var script = document.createElement('script'); script.src='https://youtube.com/ytpro_cdn/npm/ytpro/bgplay.js'; document.body.appendChild(script);  })();",null);

            // Inject video download handler (ES6 module)
            web.evaluateJavascript("(function () { var script = document.createElement('script');script.type='module';script.src='https://youtube.com/ytpro_cdn/npm/ytpro/innertube.js'; document.body.appendChild(script);  })();",null);

            super.onPageFinished(p1, url);
        }
    }

    // Assuming 'web' is a WebView instance initialized elsewhere in the Activity
    private WebView web;
}
```

--------------------------------

### Sponsor Segment Skipping with SponsorBlock API (JavaScript)

Source: https://context7.com/prateek-chaubey/ytpro/llms.txt

Automatically skips sponsored segments in videos by fetching data from the SponsorBlock API. It monitors video playback and skips to the end of identified sponsor segments. Visual indicators are displayed on the progress bar. Dependencies include the SponsorBlock API and DOM manipulation.

```javascript
// script.js - SponsorBlock integration
async function checkSponsors(Url){
    if(Url.indexOf("watch") > -1){
        sTime = [];

        // Fetch sponsor segments from SponsorBlock API
        await fetch("https://sponsor.ajay.app/api/skipSegments?videoID=" +
                   new URL(Url).searchParams.get("v"))
        .then(response => response.json())
        .then(jsonObject => {
            for(var x in jsonObject){
                var time = jsonObject[x].segment;
                sTime.push(time); // Array of [start, end] timestamps
            }
        }).catch(error => {});

        var player = await waitForElement(".video-stream", true);

        // Monitor playback and skip sponsors
        player.ontimeupdate = () => {
            skipSponsor(); // Draw sponsor markers on progress bar
            var cur = player.currentTime;
            for(var x in sTime){
                var s2 = sTime[x];
                if(Math.floor(cur) == Math.floor(s2[0])){
                    if(localStorage.getItem("autoSpn") == "true"){
                        player.currentTime = s2[1]; // Skip to end of segment
                        addSkipper(s2[0]); // Show notification
                    }
                }
            }
        };
    }
}

// Visual sponsor segment markers on progress bar
async function skipSponsor(){
    var sDiv = document.createElement("div");
    sDiv.setAttribute("id", "sDiv");
    var player = document.getElementsByClassName("video-stream")[0];
    var dur = player.duration;

    // Create colored bars for each sponsor segment
    for(var x in sTime){
        var s1 = document.createElement("div");
        var s2 = sTime[x];
        s1.setAttribute("style",
            `height:3px;width:${(100/dur) * (s2[1]-s2[0])}%;` +
            `background:#0f8;position:absolute;left:${(100/dur) * s2[0]}%;`);
        sDiv.appendChild(s1);
    }

    document.getElementsByClassName('ytPlayerProgressBarHost')[0].appendChild(sDiv);
}

```

--------------------------------

### Block YouTube Ads using Fetch Interception and DOM Manipulation (JavaScript)

Source: https://context7.com/prateek-chaubey/ytpro/llms.txt

This snippet demonstrates an ad blocker for YouTube. It intercepts network requests to block ad-related URLs and modifies API responses to remove ad content. It also continuously monitors the DOM to skip video ads and remove ad elements.

```javascript
// script.js - AdBlocker using fetch interception
(() => {
    const _origFetch = window.fetch;
    window.fetch = async function(input, init) {
        try {
            const url = (typeof input === 'string') ? input : input.url;

            // Block ad-related URLs at request level
            if(url.includes("googleads.g.doubleclick.net") ||
               url.includes("youtube.com/youtubei/v1/player/ad_break") ||
               url.includes("youtube.com/pagead/adview") ||
               url.includes("youtube.com/api/stats/ads")){
                return "";
            } else {
                const response = await _origFetch.apply(this, arguments);

                try {
                    const clone = response.clone();
                    let data = await clone.json();

                    // Remove ad content from API responses
                    delete data.adSlots;
                    delete data.playerAds;
                    delete data.adPlacements;
                    delete data.adBreakHeartbeatParams;

                    const newBody = JSON.stringify(data);
                    const newHeaders = new Headers(response.headers);
                    newHeaders.set("content-length", String(newBody.length));

                    return new Response(newBody, {
                        status: response.status,
                        statusText: response.statusText,
                        headers: newHeaders
                    });
                } catch (e) { 
                    return response;
                }
            }
        } catch (e) { } 
    };
})();

// DOM-level ad blocking (runs continuously via MutationObserver)
function adsBlock(){
    // Skip video ads by jumping to end
    try{
        document.getElementsByClassName("ad-interrupting")[0]
            .getElementsByTagName("video")[0].currentTime =
            document.getElementsByClassName("ad-interrupting")[0]
            .getElementsByTagName("video")[0].duration;
        document.getElementsByClassName("ytp-ad-skip-button-modern")[0].click();
    }catch{} // eslint-disable-line no-empty

    // Remove ad DOM elements
    var ads = document.getElementsByTagName("ad-slot-renderer");
    for(var x in ads){
        try{ads[x].remove();}catch{} // eslint-disable-line no-empty
    }
}

// Continuously run adsBlock to handle dynamic content
const observer = new MutationObserver(adsBlock);
observer.observe(document.body, { childList: true, subtree: true });

// Initial run in case ads are present on load
adsBlock();

```

--------------------------------

### Custom Video Codec Control using JavaScript

Source: https://context7.com/prateek-chaubey/ytpro/llms.txt

This script allows users to enable or disable specific video and audio codecs for YouTube playback. It overrides the browser's `canPlayType` and `MediaSource.isTypeSupported` methods to filter codecs based on user preferences stored in `localStorage`. It also includes an option to block high frame rates.

```javascript
// script.js - Codec override system
var YTPROCodecs = {
    video: ["AV1", "VP8", "VP9", "H264"],
    audio: ["Opus", "Mp4a"]
};

function override() {
    var videoElem = document.createElement('video');
    var origCanPlayType = videoElem.canPlayType.bind(videoElem);
    videoElem.__proto__.canPlayType = makeModifiedTypeChecker(origCanPlayType);

    var mse = window.MediaSource;
    if (mse === undefined) return;
    var origIsTypeSupported = mse.isTypeSupported.bind(mse);
    mse.isTypeSupported = makeModifiedTypeChecker(origIsTypeSupported);
}

function makeModifiedTypeChecker(origChecker) {
    return function (type) {
        if (type === undefined) return '';

        var disallowed_types = [];

        // Check user preferences for disabled codecs
        if (localStorage['H264'] === 'false') disallowed_types.push('avc');
        if (localStorage['VP8'] === 'false') disallowed_types.push('vp8');
        if (localStorage['VP9'] === 'false') disallowed_types.push('vp9', 'vp09');
        if (localStorage['AV1'] === 'true') disallowed_types.push('av01', 'av99');
        if (localStorage['Opus'] === 'false') disallowed_types.push('opus');
        if (localStorage['Mp4a'] === 'false') disallowed_types.push('mp4a');

        // Block disallowed codecs
        for (var i = 0; i < disallowed_types.length; i++) {
            if (type.indexOf(disallowed_types[i]) !== -1) return '';
        }

        // Block high frame rates if enabled
        if (localStorage['block_60fps'] === 'true') {
            var match = /framerate=(\d+)/.exec(type);
            if (match && match[1] > 30) return '';
        }

        return origChecker(type);
    };
}

override(); // Apply on page load

```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.