Full Code of erkserkserks/h264ify-firefox for AI

Repository: erkserkserks/h264ify-firefox
Branch: master
Commit: 1427d222f592
Files: 5
Total size: 8.3 KB

Directory structure:
gitextract_lw3wu6xw/

├── README.md
├── data/
│   ├── content_script.js
│   └── inject.js
├── index.js
└── package.json

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FILE CONTENTS
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FILE: README.md
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<meta property="og:image"
    content="https://raw.githubusercontent.com/erkserkserks/h264ify-firefox/master/icons/icon128.png"/>

# h264ify-firefox

![](https://raw.githubusercontent.com/erkserkserks/h264ify-firefox/master/noncode/screenshot_video.png)

# About
h264ify is a Firefox/Chrome extension that makes YouTube stream H.264 videos instead of VP8/VP9 videos.

Try h264ify if YouTube videos stutter, take up too much CPU, eat battery life, or make your laptop hot.

By default, YouTube streams VP8/VP9 encoded video. However, this can cause problems with less powerful machines because VP8/VP9 is not typically hardware accelerated.

In contrast, H.264 is commonly hardware accelerated by GPUs, which usually means smoother video playback and reduced CPU usage.

# Requirements
Firefox

Looking for the Chrome version? See: https://github.com/erkserkserks/h264ify

# Installation
Install from here: https://addons.mozilla.org/firefox/addon/h264ify/

If all goes well, when you visit https://www.youtube.com/html5, you should see this:
![](https://raw.githubusercontent.com/erkserkserks/h264ify-firefox/master/noncode/screenshot_support.png)

Note: The current version of Firefox (35) doesn't support MSE, but when support arrives, h264ify will also block VP9.


================================================
FILE: data/content_script.js
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/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 erkserkserks
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

// This content script runs in an isolated environment and cannot modify any
// javascript variables on the youtube page. Thus, we have to inject another
// script into the DOM using a script tag.

// Set defaults for options stored in localStorage
if (localStorage['h264ify-enable'] === undefined) {
  localStorage['h264ify-enable'] = true;
}
if (localStorage['h264ify-block_60fps'] === undefined) {
  localStorage['h264ify-block_60fps'] = false;
}

// Cache extension preferences in localStorage.
// This is needed because port.on is async and we want to
// load the injection script immediately.
self.port.on('prefs', function(prefs) {
  console.log('port on prefs')
  localStorage['h264ify-enable'] = prefs['enable'];
  localStorage['h264ify-block_60fps'] = prefs['block_60fps'];
});

// Create script elem which will be injected into the page
var script = document.createElement('script');
script.type = 'text/javascript';
// Use textContent instead of src to run inject.js synchronously
script.textContent = self.options.injectjsText;
var html = document.documentElement;
// Inject js into the page
html.insertBefore(script, html.firstChild);
// Clean up
script.remove()


================================================
FILE: data/inject.js
================================================
/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 erkserkserks
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

(function () {
  if (localStorage['h264ify-enable'] === 'false') {
    return;
  }

  // return a custom MIME type checker that can defer to the original function
  function makeModifiedMimeTypeChecker(origFunc) {
    return function (type) {
      if (type === undefined) return '';

      var disallowed_types = ['webm', 'vp8', 'vp9'];
      // If video type is in disallowed_types, say we don't support them
      for (var i = 0; i < disallowed_types.length; i++) {
        if (type.indexOf(disallowed_types[i]) != -1) return '';
      }

      if (localStorage['h264ify-block_60fps'] === 'true') {
        var match = /framerate=(\d+)/.exec(type);
        if (match && match[1] > 30) return '';
      }

      // Otherwise, ask the browser
      return origFunc(type);
    };
  }

  // Override video element canPlayType() function
  var videoElem = document.createElement('video');
  var origCanPlayType = videoElem.canPlayType.bind(videoElem);
  videoElem.__proto__.canPlayType = makeModifiedMimeTypeChecker(origCanPlayType);

  // Override media source extension isTypeSupported() function
  var mse = window.MediaSource;
  // Check for MSE support before use - some versions of FF don't support MSE
  if (mse === undefined) return;
  var origIsTypeSupported = mse.isTypeSupported.bind(mse);
  mse.isTypeSupported = makeModifiedMimeTypeChecker(origIsTypeSupported);
})();



================================================
FILE: index.js
================================================
/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 erkserkserks
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

var data = require('sdk/self').data;
var pageMod = require('sdk/page-mod');

pageMod.PageMod({
  include: '*.youtube.com', 
  contentScriptWhen: 'start',
  contentScriptFile: data.url('content_script.js'),
  contentScriptOptions: {'injectjsText' : data.load('inject.js')},
  onAttach: function(worker) {
    worker.port.emit('prefs', require('sdk/simple-prefs').prefs);

    function onPrefChange(prefName) {
      worker.port.emit('prefs', require('sdk/simple-prefs').prefs);
    }
    require('sdk/simple-prefs').on('', onPrefChange);
  }
});



================================================
FILE: package.json
================================================
{
  "name": "h264ify",
  "description": "Makes YouTube stream H.264 videos instead of VP8/VP9 videos",
  "version": "1.0.5",
  "author": "erkserkserks",
  "engines": {
    "firefox": ">= 38.0a1",
    "fennec": ">= 38.0a1"
  },
  "homepage": "https://github.com/erkserkserks/h264ify-firefox",
  "icon": "icon.png",
  "id": "jid1-TSgSxBhncsPBWQ@jetpack",
  "license": "MIT",
  "permissions": {
    "multiprocess": true,
    "private-browsing": true
  },
  "preferences": [
    {
      "name": "enable",
      "title": "Enable h264ify",
      "type": "bool",
      "value": true
    },
    {
      "name": "block_60fps",
      "title": "Block 60fps",
      "type": "bool",
      "value": false
    }
  ],
  "title": "h264ify"
}