mirror of
https://github.com/MarshalX/telegram-crawler.git
synced 2024-11-29 03:33:09 +01:00
9663 lines
No EOL
277 KiB
JavaScript
9663 lines
No EOL
277 KiB
JavaScript
(function webpackUniversalModuleDefinition(root, factory) {
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if(typeof exports === 'object' && typeof module === 'object')
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module.exports = factory();
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else if(typeof define === 'function' && define.amd)
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define([], factory);
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else if(typeof exports === 'object')
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exports["ogvjs"] = factory();
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else
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root["ogvjs"] = factory();
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})(this, function() {
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return /******/ (function(modules) { // webpackBootstrap
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/******/ // The module cache
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/******/ var installedModules = {};
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/******/ // The require function
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/******/ function __webpack_require__(moduleId) {
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/******/ // Check if module is in cache
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/******/ if(installedModules[moduleId])
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/******/ return installedModules[moduleId].exports;
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/******/ // Create a new module (and put it into the cache)
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/******/ var module = installedModules[moduleId] = {
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/******/ exports: {},
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/******/ id: moduleId,
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/******/ loaded: false
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/******/ };
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/******/ // Execute the module function
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/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
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/******/ // Flag the module as loaded
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/******/ module.loaded = true;
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/******/ // Return the exports of the module
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/******/ return module.exports;
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/******/ }
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/******/ // expose the modules object (__webpack_modules__)
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/******/ __webpack_require__.m = modules;
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/******/ // expose the module cache
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/******/ __webpack_require__.c = installedModules;
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/******/ // __webpack_public_path__
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/******/ __webpack_require__.p = "";
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/******/ // Load entry module and return exports
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/******/ return __webpack_require__(0);
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/******/ })
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/************************************************************************/
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/******/ ([
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/* 0 */
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/***/ (function(module, exports, __webpack_require__) {
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//
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// -- ogv.js
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// https://github.com/brion/ogv.js
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// Copyright (c) 2013-2016 Brion Vibber
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//
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var OGVCompat = __webpack_require__(1),
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OGVLoader = __webpack_require__(3),
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OGVMediaType = __webpack_require__(7),
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OGVPlayer = __webpack_require__(8),
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OGVVersion = ("1.4.2-20170425024925-504d7197");
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// Version 1.0's web-facing and test-facing interfaces
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if (window) {
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window.OGVCompat = OGVCompat;
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window.OGVLoader = OGVLoader;
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window.OGVMediaType = OGVMediaType;
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window.OGVPlayer = OGVPlayer;
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window.OGVVersion = OGVVersion;
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}
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module.exports = {
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OGVCompat: OGVCompat,
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OGVLoader: OGVLoader,
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OGVMediaType: OGVMediaType,
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OGVPlayer: OGVPlayer,
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OGVVersion: OGVVersion
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};
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/***/ }),
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/* 1 */
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/***/ (function(module, exports, __webpack_require__) {
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var BogoSlow = __webpack_require__(2);
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var OGVCompat = {
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benchmark: new BogoSlow(),
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hasTypedArrays: function() {
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// emscripten-compiled code requires typed arrays
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return !!window.Uint32Array;
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},
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hasWebAudio: function() {
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return !!(window.AudioContext || window.webkitAudioContext);
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},
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hasFlash: function() {
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if (navigator.userAgent.indexOf('Trident') !== -1) {
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// We only do the ActiveX test because we only need Flash in
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// Internet Explorer 10/11. Other browsers use Web Audio directly
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// (Edge, Safari) or native playback, so there's no need to test
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// other ways of loading Flash.
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try {
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var obj = new ActiveXObject('ShockwaveFlash.ShockwaveFlash');
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return true;
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} catch(e) {
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return false;
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}
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}
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return false;
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},
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hasAudio: function() {
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return this.hasWebAudio() || this.hasFlash();
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},
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isBlacklisted: function(userAgent) {
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// JIT bugs in old Safari versions
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var blacklist = [
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/\(i.* OS [67]_.* like Mac OS X\).* Mobile\/.* Safari\//,
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/\(Macintosh.* Version\/6\..* Safari\/\d/
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];
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var blacklisted = false;
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blacklist.forEach(function(regex) {
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if (userAgent.match(regex)) {
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blacklisted = true;
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}
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});
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return blacklisted;
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},
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isSlow: function() {
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return this.benchmark.slow;
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},
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isTooSlow: function() {
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return this.benchmark.tooSlow;
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},
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supported: function(component) {
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if (component === 'OGVDecoder') {
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return (this.hasTypedArrays() && !this.isBlacklisted(navigator.userAgent));
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}
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if (component === 'OGVPlayer') {
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return (this.supported('OGVDecoder') && this.hasAudio() && !this.isTooSlow());
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}
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return false;
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}
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};
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module.exports = OGVCompat;
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/***/ }),
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/* 2 */
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/***/ (function(module, exports) {
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/**
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* A quick CPU/JS engine benchmark to guesstimate whether we're
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* fast enough to handle 360p video in JavaScript.
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*/
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function BogoSlow() {
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var self = this;
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var timer;
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// FIXME: avoid to use window scope here
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if (window.performance && window.performance.now) {
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timer = function() {
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return window.performance.now();
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};
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} else {
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timer = function() {
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return Date.now();
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};
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}
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var savedSpeed = null;
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function run() {
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var ops = 0;
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var fibonacci = function(n) {
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ops++;
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if (n < 2) {
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return n;
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} else {
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return fibonacci(n - 2) + fibonacci(n - 1);
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}
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};
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var start = timer();
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fibonacci(30);
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var delta = timer() - start;
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savedSpeed = (ops / delta);
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}
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/**
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* Return a scale value of operations/sec from the benchmark.
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* If the benchmark has already been run, uses a memoized result.
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*
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* @property {number}
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*/
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Object.defineProperty(self, 'speed', {
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get: function() {
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if (savedSpeed === null) {
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run();
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}
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return savedSpeed;
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}
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});
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/**
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* Return the defined cutoff speed value for 'slow' devices,
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* based on results measured from some test devices.
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*
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* @property {number}
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*/
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Object.defineProperty(self, 'slowCutoff', {
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get: function() {
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// 2012 Retina MacBook Pro (Safari 7) ~150,000
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// 2009 Dell T5500 (IE 11) ~100,000
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// iPad Air (iOS 7) ~65,000
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// 2010 MBP / OS X 10.9 (Safari 7) ~62,500
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// 2010 MBP / Win7 VM (IE 11) ~50,000+-
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// ^ these play 360p ok
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// ----------- line of moderate doom ----------
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return 50000;
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// v these play 160p ok
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// iPad Mini non-Retina (iOS 8 beta) ~25,000
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// Dell Inspiron Duo (IE 11) ~25,000
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// Surface RT (IE 11) ~18,000
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// iPod Touch 5th-gen (iOS 8 beta) ~16,000
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}
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});
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/**
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* Return the defined cutoff speed value for 'too slow' devices,
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* based on results measured from some test devices.
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*
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* No longer used.
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*
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* @property {number}
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* @deprecated
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*/
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Object.defineProperty(self, 'tooSlowCutoff', {
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get: function() {
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return 0;
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}
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});
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/**
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* 'Slow' devices can play audio and should sorta play our
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* extra-tiny Wikimedia 160p15 transcodes
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*
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* @property {boolean}
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*/
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Object.defineProperty(self, 'slow', {
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get: function() {
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return (self.speed < self.slowCutoff);
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}
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});
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/**
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* 'Too slow' devices aren't reliable at all
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*
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* @property {boolean}
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*/
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Object.defineProperty(self, 'tooSlow', {
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get: function() {
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return (self.speed < self.tooSlowCutoff);
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}
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});
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}
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module.exports = BogoSlow;
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/***/ }),
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/* 3 */
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/***/ (function(module, exports, __webpack_require__) {
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var OGVVersion = ("1.4.2-20170425024925-504d7197");
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(function() {
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var global = this;
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var scriptMap = {
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OGVDemuxerOgg: 'ogv-demuxer-ogg.js',
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OGVDemuxerOggW: 'ogv-demuxer-ogg-wasm.js',
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OGVDemuxerWebM: 'ogv-demuxer-webm.js',
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OGVDemuxerWebMW: 'ogv-demuxer-webm-wasm.js',
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OGVDecoderAudioOpus: 'ogv-decoder-audio-opus.js',
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OGVDecoderAudioOpusW: 'ogv-decoder-audio-opus-wasm.js',
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OGVDecoderAudioVorbis: 'ogv-decoder-audio-vorbis.js',
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OGVDecoderAudioVorbisW: 'ogv-decoder-audio-vorbis-wasm.js',
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OGVDecoderVideoTheora: 'ogv-decoder-video-theora.js',
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OGVDecoderVideoTheoraW: 'ogv-decoder-video-theora-wasm.js',
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OGVDecoderVideoVP8: 'ogv-decoder-video-vp8.js',
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OGVDecoderVideoVP8W: 'ogv-decoder-video-vp8-wasm.js',
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OGVDecoderVideoVP8MT: 'ogv-decoder-video-vp8-mt.js',
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OGVDecoderVideoVP9: 'ogv-decoder-video-vp9.js',
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OGVDecoderVideoVP9W: 'ogv-decoder-video-vp9-wasm.js',
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OGVDecoderVideoVP9MT: 'ogv-decoder-video-vp9-mt.js'
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};
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// @fixme make this less awful
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var proxyTypes = {
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OGVDecoderAudioOpus: 'audio',
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OGVDecoderAudioOpusW: 'audio',
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OGVDecoderAudioVorbis: 'audio',
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OGVDecoderAudioVorbisW: 'audio',
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OGVDecoderVideoTheora: 'video',
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OGVDecoderVideoTheoraW: 'video',
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OGVDecoderVideoVP8: 'video',
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OGVDecoderVideoVP8W: 'video',
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OGVDecoderVideoVP9: 'video',
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OGVDecoderVideoVP9W: 'video'
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};
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var proxyInfo = {
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audio: {
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proxy: __webpack_require__(4),
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worker: 'ogv-worker-audio.js',
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},
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video: {
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proxy: __webpack_require__(6),
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worker: 'ogv-worker-video.js'
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}
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}
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function urlForClass(className) {
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var scriptName = scriptMap[className];
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if (scriptName) {
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return urlForScript(scriptName);
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} else {
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throw new Error('asked for URL for unknown class ' + className);
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}
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};
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function urlForScript(scriptName) {
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if (scriptName) {
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var base = OGVLoader.base;
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if (base === undefined) {
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base = '';
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} else {
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base += '/';
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}
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return base + scriptName + '?version=' + encodeURIComponent(OGVVersion);
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} else {
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throw new Error('asked for URL for unknown script ' + scriptName);
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}
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};
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var scriptStatus = {},
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scriptCallbacks = {};
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function loadWebScript(src, callback) {
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if (scriptStatus[src] == 'done') {
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callback();
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} else if (scriptStatus[src] == 'loading') {
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scriptCallbacks[src].push(callback);
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} else {
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scriptStatus[src] = 'loading';
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scriptCallbacks[src] = [callback];
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var scriptNode = document.createElement('script');
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function done(event) {
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var callbacks = scriptCallbacks[src];
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delete scriptCallbacks[src];
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scriptStatus[src] = 'done';
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callbacks.forEach(function(cb) {
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cb();
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});
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}
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scriptNode.addEventListener('load', done);
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scriptNode.addEventListener('error', done);
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scriptNode.src = src;
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document.querySelector('head').appendChild(scriptNode);
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}
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}
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function loadWebAssembly(src, callback) {
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if (!src.match(/-wasm\.js/)) {
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callback(null);
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} else {
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var wasmSrc = src.replace(/-wasm\.js/, '-wasm.wasm');
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var xhr = new XMLHttpRequest();
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xhr.responseType = 'arraybuffer';
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xhr.onload = function() {
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callback(xhr.response);
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};
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xhr.onerror = function() {
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callback(null);
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};
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xhr.open('GET', wasmSrc);
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xhr.send();
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}
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}
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function defaultBase() {
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if (typeof global.window === 'object') {
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// for browser, try to autodetect
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var scriptNodes = document.querySelectorAll('script'),
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regex = /^(?:|(.*)\/)ogv(?:-support)?\.js(?:\?|#|$)/,
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path,
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matches;
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for (var i = 0; i < scriptNodes.length; i++) {
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path = scriptNodes[i].getAttribute('src');
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if (path) {
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matches = path.match(regex);
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if (matches) {
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return matches[1];
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}
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}
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}
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return undefined; // current dir
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} else {
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|
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// for workers, assume current directory
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// if not a worker, too bad.
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return undefined;
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}
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}
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var OGVLoader = {
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base: defaultBase(),
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loadClass: function(className, callback, options) {
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options = options || {};
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if (options.worker) {
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this.workerProxy(className, callback);
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return;
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}
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var url = urlForClass(className);
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loadWebAssembly(url, function(wasmBinary) {
|
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function wasmClassWrapper(options) {
|
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options = options || {};
|
|
if (wasmBinary !== null) {
|
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options.wasmBinary = wasmBinary;
|
|
}
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return new global[className](options);
|
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}
|
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if (typeof global[className] === 'function') {
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// already loaded!
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|
callback(wasmClassWrapper);
|
|
} else if (typeof global.window === 'object') {
|
|
loadWebScript(url, function() {
|
|
callback(wasmClassWrapper);
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|
});
|
|
} else if (typeof global.importScripts === 'function') {
|
|
// worker has convenient sync importScripts
|
|
global.importScripts(url);
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|
callback(wasmClassWrapper);
|
|
}
|
|
});
|
|
},
|
|
|
|
workerProxy: function(className, callback) {
|
|
var proxyType = proxyTypes[className],
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|
info = proxyInfo[proxyType];
|
|
|
|
if (!info) {
|
|
throw new Error('Requested worker for class with no proxy: ' + className);
|
|
}
|
|
|
|
var proxyClass = info.proxy,
|
|
workerScript = info.worker,
|
|
codecUrl = urlForScript(scriptMap[className]),
|
|
workerUrl = urlForScript(workerScript),
|
|
worker;
|
|
|
|
var construct = function(options) {
|
|
return new proxyClass(worker, className, options);
|
|
};
|
|
|
|
if (workerUrl.match(/^https?:|\/\//i)) {
|
|
// Can't load workers natively cross-domain, but if CORS
|
|
// is set up we can fetch the worker stub and the desired
|
|
// class and load them from a blob.
|
|
var getCodec,
|
|
getWorker,
|
|
codecResponse,
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|
workerResponse,
|
|
codecLoaded = false,
|
|
workerLoaded = false,
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|
blob;
|
|
|
|
function completionCheck() {
|
|
if ((codecLoaded == true) && (workerLoaded == true)) {
|
|
try {
|
|
blob = new Blob([codecResponse + " " + workerResponse], {type: 'application/javascript'});
|
|
} catch (e) { // Backwards-compatibility
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|
window.BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder;
|
|
blob = new BlobBuilder();
|
|
blob.append(codecResponse + " " + workerResponse);
|
|
blob = blob.getBlob();
|
|
}
|
|
// Create the web worker
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|
worker = new Worker(URL.createObjectURL(blob));
|
|
callback(construct);
|
|
}
|
|
}
|
|
|
|
// Load the codec
|
|
getCodec = new XMLHttpRequest();
|
|
getCodec.open("GET", codecUrl, true);
|
|
getCodec.onreadystatechange = function() {
|
|
if(getCodec.readyState == 4 && getCodec.status == 200) {
|
|
codecResponse = getCodec.responseText;
|
|
// Update the codec response loaded flag
|
|
codecLoaded = true;
|
|
completionCheck();
|
|
}
|
|
};
|
|
getCodec.send();
|
|
|
|
// Load the worker
|
|
getWorker = new XMLHttpRequest();
|
|
getWorker.open("GET", workerUrl, true);
|
|
getWorker.onreadystatechange = function() {
|
|
if(getWorker.readyState == 4 && getWorker.status == 200) {
|
|
workerResponse = getWorker.responseText;
|
|
// Update the worker response loaded flag
|
|
workerLoaded = true;
|
|
completionCheck();
|
|
}
|
|
};
|
|
getWorker.send();
|
|
} else {
|
|
// Local URL; load it directly for simplicity.
|
|
worker = new Worker(workerUrl);
|
|
callback(construct);
|
|
}
|
|
}
|
|
};
|
|
|
|
module.exports = OGVLoader;
|
|
|
|
})();
|
|
|
|
|
|
/***/ }),
|
|
/* 4 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
var OGVProxyClass = __webpack_require__(5);
|
|
|
|
var OGVDecoderAudioProxy = OGVProxyClass({
|
|
loadedMetadata: false,
|
|
audioFormat: null,
|
|
audioBuffer: null,
|
|
cpuTime: 0
|
|
}, {
|
|
init: function(callback) {
|
|
this.proxy('init', [], callback);
|
|
},
|
|
|
|
processHeader: function(data, callback) {
|
|
this.proxy('processHeader', [data], callback, [data]);
|
|
},
|
|
|
|
processAudio: function(data, callback) {
|
|
this.proxy('processAudio', [data], callback, [data]);
|
|
},
|
|
|
|
close: function() {
|
|
this.terminate();
|
|
}
|
|
});
|
|
|
|
module.exports = OGVDecoderAudioProxy;
|
|
|
|
|
|
/***/ }),
|
|
/* 5 */
|
|
/***/ (function(module, exports) {
|
|
|
|
/**
|
|
* Proxy object for web worker interface for codec classes.
|
|
*
|
|
* Used by the high-level player interface.
|
|
*
|
|
* @author Brion Vibber <brion@pobox.com>
|
|
* @copyright 2015
|
|
* @license MIT-style
|
|
*/
|
|
function OGVProxyClass(initialProps, methods) {
|
|
return function(worker, className, options) {
|
|
options = options || {};
|
|
var self = this;
|
|
|
|
var transferables = (function() {
|
|
var buffer = new ArrayBuffer(1024),
|
|
bytes = new Uint8Array(buffer);
|
|
try {
|
|
worker.postMessage({
|
|
action: 'transferTest',
|
|
bytes: bytes
|
|
}, [buffer]);
|
|
if (buffer.byteLength) {
|
|
// No transferable support
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
})();
|
|
|
|
// Set up proxied property getters
|
|
var props = {};
|
|
for (var iPropName in initialProps) {
|
|
if (initialProps.hasOwnProperty(iPropName)) {
|
|
(function(propName) {
|
|
props[propName] = initialProps[propName];
|
|
Object.defineProperty(self, propName, {
|
|
get: function getProperty() {
|
|
return props[propName];
|
|
}
|
|
});
|
|
})(iPropName);
|
|
}
|
|
}
|
|
|
|
// Current player wants to avoid async confusion.
|
|
var processingQueue = 0;
|
|
Object.defineProperty(self, 'processing', {
|
|
get: function() {
|
|
return (processingQueue > 0);
|
|
}
|
|
});
|
|
|
|
// Set up proxied methods
|
|
for (var method in methods) {
|
|
if (methods.hasOwnProperty(method)) {
|
|
self[method] = methods[method];
|
|
}
|
|
}
|
|
|
|
// And some infrastructure!
|
|
var messageCount = 0,
|
|
pendingCallbacks = {};
|
|
this.proxy = function(action, args, callback, transfers) {
|
|
if (!worker) {
|
|
throw 'Tried to call "' + action + '" method on closed proxy object';
|
|
}
|
|
var callbackId = 'callback-' + (++messageCount) + '-' + action;
|
|
if (callback) {
|
|
pendingCallbacks[callbackId] = callback;
|
|
}
|
|
var out = {
|
|
'action': action,
|
|
'callbackId': callbackId,
|
|
'args': args || []
|
|
};
|
|
processingQueue++;
|
|
if (transferables) {
|
|
worker.postMessage(out, transfers || []);
|
|
} else {
|
|
worker.postMessage(out);
|
|
}
|
|
};
|
|
this.terminate = function() {
|
|
if (worker) {
|
|
worker.terminate();
|
|
worker = null;
|
|
processingQueue = 0;
|
|
pendingCallbacks = {};
|
|
}
|
|
};
|
|
|
|
worker.addEventListener('message', function proxyOnMessage(event) {
|
|
processingQueue--;
|
|
if (event.data.action !== 'callback') {
|
|
// ignore
|
|
return;
|
|
}
|
|
|
|
var data = event.data,
|
|
callbackId = data.callbackId,
|
|
args = data.args,
|
|
callback = pendingCallbacks[callbackId];
|
|
|
|
// Save any updated properties returned to us...
|
|
if (data.props) {
|
|
for (var propName in data.props) {
|
|
if (data.props.hasOwnProperty(propName)) {
|
|
props[propName] = data.props[propName];
|
|
}
|
|
}
|
|
}
|
|
|
|
if (callback) {
|
|
delete pendingCallbacks[callbackId];
|
|
callback.apply(this, args);
|
|
}
|
|
});
|
|
|
|
// Tell the proxy to load and initialize the appropriate class
|
|
self.proxy('construct', [className, options], function() {});
|
|
|
|
return self;
|
|
};
|
|
}
|
|
|
|
module.exports = OGVProxyClass;
|
|
|
|
/***/ }),
|
|
/* 6 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
var OGVProxyClass = __webpack_require__(5);
|
|
|
|
var OGVDecoderVideoProxy = OGVProxyClass({
|
|
loadedMetadata: false,
|
|
videoFormat: null,
|
|
frameBuffer: null,
|
|
cpuTime: 0
|
|
}, {
|
|
init: function(callback) {
|
|
this.proxy('init', [], callback);
|
|
},
|
|
|
|
processHeader: function(data, callback) {
|
|
this.proxy('processHeader', [data], callback, [data]);
|
|
},
|
|
|
|
processFrame: function(data, callback) {
|
|
this.proxy('processFrame', [data], callback, [data]);
|
|
},
|
|
|
|
close: function() {
|
|
this.terminate();
|
|
}
|
|
});
|
|
|
|
module.exports = OGVDecoderVideoProxy;
|
|
|
|
/***/ }),
|
|
/* 7 */
|
|
/***/ (function(module, exports) {
|
|
|
|
function OGVMediaType(contentType) {
|
|
contentType = '' + contentType;
|
|
|
|
var self = this;
|
|
self.major = null;
|
|
self.minor = null;
|
|
self.codecs = null;
|
|
|
|
function trim(str) {
|
|
return str.replace(/^\s+/, '').replace(/\s+$/, '');
|
|
}
|
|
|
|
function split(str, sep, limit) {
|
|
var bits = str.split(sep, limit).map(function(substr) {
|
|
return trim(substr);
|
|
});
|
|
if (typeof limit === 'number') {
|
|
while (bits.length < limit) {
|
|
bits.push(null);
|
|
}
|
|
}
|
|
return bits;
|
|
}
|
|
|
|
var parts = split(contentType, ';');
|
|
if (parts.length) {
|
|
var base = parts.shift();
|
|
if (base) {
|
|
var bits = split(base, '/', 2);
|
|
self.major = bits[0];
|
|
self.minor = bits[1];
|
|
}
|
|
|
|
parts.forEach(function(str) {
|
|
var matches = str.match(/^codecs\s*=\s*"(.*?)"$/);
|
|
if (matches) {
|
|
self.codecs = split(matches[1], ',');
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
module.exports = OGVMediaType;
|
|
|
|
|
|
/***/ }),
|
|
/* 8 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
__webpack_require__(9).polyfill();
|
|
|
|
var YUVCanvas = __webpack_require__(12);
|
|
|
|
// -- OGVLoader.js
|
|
var OGVLoader = __webpack_require__(3);
|
|
|
|
// -- StreamFile.js
|
|
var StreamFile = __webpack_require__(19);
|
|
|
|
// -- AudioFeeder.js
|
|
var AudioFeeder = __webpack_require__(30),
|
|
dynamicaudio_swf = __webpack_require__(31);
|
|
|
|
// -- Bisector.js
|
|
var Bisector = __webpack_require__(32);
|
|
|
|
// -- OGVMediaType.js
|
|
var OGVMediaType = __webpack_require__(7);
|
|
|
|
// -- OGVWrapperCodec.js
|
|
var OGVWrapperCodec = __webpack_require__(33);
|
|
|
|
// -- OGVDecoderAudioProxy.js
|
|
var OGVDecoderAudioProxy = __webpack_require__(4);
|
|
|
|
// -- OGVDecoderVideoProxy.js
|
|
var OGVDecoderVideoProxy = __webpack_require__(6);
|
|
|
|
/**
|
|
* Constructor for an analogue of the TimeRanges class
|
|
* returned by various HTMLMediaElement properties
|
|
*
|
|
* Pass an array of two-element arrays, each containing a start and end time.
|
|
*/
|
|
// FIXME: not use window scope if possible here
|
|
var OGVTimeRanges = window.OGVTimeRanges = function(ranges) {
|
|
Object.defineProperty(this, 'length', {
|
|
get: function getLength() {
|
|
return ranges.length;
|
|
}
|
|
});
|
|
this.start = function(i) {
|
|
return ranges[i][0];
|
|
};
|
|
this.end = function(i) {
|
|
return ranges[i][1];
|
|
};
|
|
return this;
|
|
};
|
|
|
|
var OGVMediaErrorConstants = {
|
|
MEDIA_ERR_ABORTED: 1,
|
|
MEDIA_ERR_NETWORK: 2,
|
|
MEDIA_ERR_DECODE: 3,
|
|
MEDIA_ERR_SRC_NOT_SUPPORTED: 4
|
|
};
|
|
function extend(dest, src) {
|
|
for (prop in src) {
|
|
if (src.hasOwnProperty(prop)) {
|
|
dest[prop] = src[prop];
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Constructor for analogue of the MediaError class
|
|
* returned by HTMLMediaElement.error property
|
|
*/
|
|
var OGVMediaError = window.OGVMediaError = function(code, message) {
|
|
this.code = code;
|
|
this.message = message;
|
|
};
|
|
extend(OGVMediaError, OGVMediaErrorConstants);
|
|
extend(OGVMediaError.prototype, OGVMediaErrorConstants);
|
|
|
|
/**
|
|
* Player class -- instantiate one of these to get an 'ogvjs' HTML element
|
|
* which has a similar interface to the HTML audio/video elements.
|
|
*
|
|
* @param options: optional dictionary of options:
|
|
* 'base': string; base URL for additional resources, such as Flash audio shim
|
|
* 'webGL': bool; pass true to use WebGL acceleration if available
|
|
* 'forceWebGL': bool; pass true to require WebGL even if not detected
|
|
* 'sync': string; A/V sync plan: one of:
|
|
* 'delay-audio' (pre-1.3.2 behavior) stop audio when behind, then play all frames to catch up
|
|
* 'skip-frames' (default) to preserve audio, skipping frames until the next sync point (keyframe)
|
|
*/
|
|
var OGVPlayer = function(options) {
|
|
options = options || {};
|
|
|
|
var instanceId = 'ogvjs' + (++OGVPlayer.instanceCount);
|
|
|
|
var codecClass = null,
|
|
codecType = null;
|
|
|
|
var canvasOptions = {};
|
|
if (options.webGL !== undefined) {
|
|
// @fixme confirm format of webGL option
|
|
canvasOptions.webGL = options.webGL;
|
|
}
|
|
if(!!options.forceWebGL) {
|
|
canvasOptions.webGL = 'required';
|
|
}
|
|
|
|
// Experimental options
|
|
var enableWebM = !!options.enableWebM;
|
|
|
|
// Running the codec in a worker thread equals happy times!
|
|
var enableWorker = !!window.Worker;
|
|
if (typeof options.worker !== 'undefined') {
|
|
enableWorker = !!options.worker;
|
|
}
|
|
var enableThreading = !!options.threading;
|
|
var enableWASM = !!options.wasm;
|
|
|
|
if (options.sync === undefined) {
|
|
options.sync = 'skip-frames';
|
|
}
|
|
|
|
var State = {
|
|
INITIAL: 'INITIAL',
|
|
SEEKING_END: 'SEEKING_END',
|
|
LOADED: 'LOADED',
|
|
PRELOAD: 'PRELOAD',
|
|
READY: 'READY',
|
|
PLAYING: 'PLAYING',
|
|
SEEKING: 'SEEKING',
|
|
ENDED: 'ENDED',
|
|
ERROR: 'ERROR'
|
|
}, state = State.INITIAL;
|
|
|
|
var SeekState = {
|
|
NOT_SEEKING: 'NOT_SEEKING',
|
|
BISECT_TO_TARGET: 'BISECT_TO_TARGET',
|
|
BISECT_TO_KEYPOINT: 'BISECT_TO_KEYPOINT',
|
|
LINEAR_TO_TARGET: 'LINEAR_TO_TARGET'
|
|
}, seekState = SeekState.NOT_SEEKING;
|
|
|
|
var audioOptions = {},
|
|
codecOptions = {};
|
|
options.base = options.base || OGVLoader.base;
|
|
if (typeof options.base === 'string') {
|
|
// Pass the resource dir down to AudioFeeder, so it can load the dynamicaudio.swf
|
|
audioOptions.base = options.base;
|
|
|
|
// And to the worker thread, so it can load the codec JS
|
|
codecOptions.base = options.base;
|
|
}
|
|
if (typeof options.audioContext !== 'undefined') {
|
|
// Try passing a pre-created audioContext in?
|
|
audioOptions.audioContext = options.audioContext;
|
|
}
|
|
if (typeof options.audioDestination !== 'undefined') {
|
|
// Try passing a pre-created audioContext in?
|
|
audioOptions.output = options.audioDestination;
|
|
}
|
|
// Buffer in largeish chunks to survive long CPU spikes on slow CPUs (eg, 32-bit iOS)
|
|
audioOptions.bufferSize = 8192;
|
|
|
|
codecOptions.worker = enableWorker;
|
|
codecOptions.threading = enableThreading;
|
|
codecOptions.wasm = enableWASM;
|
|
if (typeof options.memoryLimit === 'number') {
|
|
codecOptions.memoryLimit = options.memoryLimit;
|
|
}
|
|
|
|
var canvas = document.createElement('canvas');
|
|
var frameSink;
|
|
|
|
// Return a magical custom element!
|
|
var self = document.createElement('ogvjs');
|
|
self.className = instanceId;
|
|
|
|
extend(self, constants);
|
|
|
|
canvas.style.position = 'absolute';
|
|
canvas.style.top = '0';
|
|
canvas.style.left = '0';
|
|
canvas.style.width = '100%';
|
|
canvas.style.height = '100%';
|
|
canvas.style.objectFit = 'contain';
|
|
self.appendChild(canvas);
|
|
|
|
var getTimestamp;
|
|
// FIXME: don't use window scope, see BogoSlow.js
|
|
if (window.performance === undefined || window.performance.now === undefined) {
|
|
getTimestamp = Date.now;
|
|
} else {
|
|
getTimestamp = window.performance.now.bind(window.performance);
|
|
}
|
|
function time(cb) {
|
|
var start = getTimestamp();
|
|
cb();
|
|
var delta = getTimestamp() - start;
|
|
lastFrameDecodeTime += delta;
|
|
return delta;
|
|
}
|
|
|
|
var then = getTimestamp();
|
|
function log(msg) {
|
|
if (options.debug) {
|
|
var now = getTimestamp(),
|
|
delta = now - then;
|
|
|
|
//console.log('+' + delta + 'ms ' + msg);
|
|
//then = now;
|
|
|
|
if (!options.debugFilter || msg.match(options.debugFilter)) {
|
|
console.log('[' + (Math.round(delta * 10) / 10) + 'ms] ' + msg);
|
|
}
|
|
}
|
|
}
|
|
|
|
function fireEvent(eventName, props) {
|
|
log('fireEvent ' + eventName);
|
|
var event;
|
|
props = props || {};
|
|
|
|
var standard = (typeof window.Event == 'function');
|
|
if (standard) {
|
|
// standard event creation
|
|
event = new CustomEvent(eventName);
|
|
} else {
|
|
// IE back-compat mode
|
|
// https://msdn.microsoft.com/en-us/library/dn905219%28v=vs.85%29.aspx
|
|
event = document.createEvent('Event');
|
|
event.initEvent(eventName, false, false);
|
|
}
|
|
|
|
for (var prop in props) {
|
|
if (props.hasOwnProperty(prop)) {
|
|
event[prop] = props[prop];
|
|
}
|
|
}
|
|
|
|
var allowDefault = self.dispatchEvent(event);
|
|
if (!standard && eventName === 'resize' && self.onresize && allowDefault) {
|
|
// resize demands special treatment!
|
|
// in IE 11 it doesn't fire through to the .onresize handler
|
|
// for some crazy reason
|
|
self.onresize.call(self, event);
|
|
}
|
|
}
|
|
function fireEventAsync(eventName, props) {
|
|
log('fireEventAsync ' + eventName);
|
|
setTimeout(function() {
|
|
fireEvent(eventName, props);
|
|
}, 0);
|
|
}
|
|
|
|
var codec = null,
|
|
videoInfo = null,
|
|
audioInfo = null,
|
|
actionQueue = [],
|
|
audioFeeder = null;
|
|
var muted = false,
|
|
initialPlaybackPosition = 0.0,
|
|
initialPlaybackOffset = 0.0,
|
|
prebufferingAudio = false,
|
|
stoppedForLateFrame = false,
|
|
initialSeekTime = 0.0;
|
|
function initAudioFeeder() {
|
|
audioFeeder = new AudioFeeder( audioOptions );
|
|
audioFeeder.init(audioInfo.channels, audioInfo.rate);
|
|
|
|
// At our requested 8192 buffer size, bufferDuration should be
|
|
// about 185ms at 44.1 kHz or 170ms at 48 kHz output, covering
|
|
// 4-6 frames at 24-30fps.
|
|
//
|
|
// 2 or 3 buffers' worth will be in flight at any given time;
|
|
// be warned that durationBuffered includes that in-flight stuff.
|
|
//
|
|
// Set our bufferThreshold to a full 1s for plenty of extra headroom,
|
|
// and make sure we've queued up twice that when we're operating.
|
|
audioFeeder.bufferThreshold = 1;
|
|
|
|
audioFeeder.volume = self.volume;
|
|
audioFeeder.muted = self.muted;
|
|
|
|
// If we're in a background tab, timers may be throttled.
|
|
// audioFeeder will call us when buffers need refilling,
|
|
// without any throttling.
|
|
audioFeeder.onbufferlow = function audioCallback() {
|
|
log('onbufferlow');
|
|
if ((stream && (stream.buffering || stream.seeking)) || pendingAudio) {
|
|
// We're waiting on input or other async processing;
|
|
// we'll get triggered later.
|
|
} else {
|
|
// We're in an async event so it's safe to run the loop:
|
|
pingProcessing();
|
|
}
|
|
};
|
|
|
|
// If we ran out of audio *completely* schedule some more processing.
|
|
// This shouldn't happen if we keep up with onbufferlow, except at
|
|
// the very beginning of playback when we haven't buffered any data yet.
|
|
// @todo pre-buffer a little data to avoid needing this
|
|
audioFeeder.onstarved = function () {
|
|
if (dataEnded) {
|
|
// Probably end of file.
|
|
// Do nothing!
|
|
log('onstarved: appear to have reached end of audio');
|
|
} else {
|
|
log('onstarved: halting audio due to starvation');
|
|
stopPlayback();
|
|
prebufferingAudio = true;
|
|
}
|
|
if (isProcessing()) {
|
|
// We're waiting on input or other async processing;
|
|
// we'll get triggered later.
|
|
} else {
|
|
// Schedule loop after this synchronous event.
|
|
pingProcessing(0);
|
|
}
|
|
};
|
|
}
|
|
|
|
function startPlayback(offset) {
|
|
if (audioFeeder) {
|
|
audioFeeder.start();
|
|
var state = audioFeeder.getPlaybackState();
|
|
initialPlaybackPosition = state.playbackPosition;
|
|
} else {
|
|
initialPlaybackPosition = getTimestamp() / 1000;
|
|
}
|
|
if (offset !== undefined) {
|
|
initialPlaybackOffset = offset;
|
|
}
|
|
// Clear the late flag if it was set.
|
|
prebufferingAudio = false;
|
|
stoppedForLateFrame = false;
|
|
log('continuing at ' + initialPlaybackPosition + ', ' + initialPlaybackOffset);
|
|
}
|
|
|
|
function stopPlayback() {
|
|
initialPlaybackOffset = getPlaybackTime();
|
|
log('pausing at ' + initialPlaybackOffset);
|
|
if (audioFeeder) {
|
|
audioFeeder.stop();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get audio playback time position in file's units
|
|
*
|
|
* @return {number} seconds since file start
|
|
*/
|
|
function getPlaybackTime(state) {
|
|
if (prebufferingAudio || stoppedForLateFrame || paused) {
|
|
return initialPlaybackOffset;
|
|
} else {
|
|
var position;
|
|
if (audioFeeder) {
|
|
state = state || audioFeeder.getPlaybackState();
|
|
position = state.playbackPosition;
|
|
} else {
|
|
// @fixme handle paused/stoped time better
|
|
position = getTimestamp() / 1000;
|
|
}
|
|
return (position - initialPlaybackPosition) + initialPlaybackOffset;
|
|
}
|
|
}
|
|
|
|
var currentSrc = '',
|
|
stream,
|
|
streamEnded = false,
|
|
seekCancel = {},
|
|
readCancel = {},
|
|
mediaError = null,
|
|
dataEnded = false,
|
|
byteLength = 0,
|
|
duration = null,
|
|
lastSeenTimestamp = null,
|
|
nextProcessingTimer,
|
|
nextFrameTimer = null,
|
|
loading = false,
|
|
started = false,
|
|
paused = true,
|
|
ended = false,
|
|
startedPlaybackInDocument = false;
|
|
|
|
var framesPlayed = 0;
|
|
// Benchmark data, exposed via getPlaybackStats()
|
|
var framesProcessed = 0, // frames
|
|
targetPerFrameTime = 1000 / 60, // ms
|
|
actualPerFrameTime = 0, // ms
|
|
totalFrameTime = 0, // ms
|
|
totalFrameCount = 0, // frames
|
|
playTime = 0, // ms
|
|
bufferTime = 0, // ms
|
|
drawingTime = 0, // ms
|
|
proxyTime = 0, // ms
|
|
totalJitter = 0; // sum of ms we're off from expected frame delivery time
|
|
// Benchmark data that doesn't clear
|
|
var droppedAudio = 0, // number of times we were starved for audio
|
|
delayedAudio = 0, // seconds audio processing was delayed by blocked CPU
|
|
lateFrames = 0; // number of times a frame was late and we had to halt audio
|
|
var poster = '', thumbnail;
|
|
|
|
// called when stopping old video on load()
|
|
function stopVideo() {
|
|
log("STOPPING");
|
|
// kill the previous video if any
|
|
state = State.INITIAL;
|
|
seekState = SeekState.NOT_SEEKING;
|
|
started = false;
|
|
//paused = true; // don't change this?
|
|
ended = false;
|
|
frameEndTimestamp = 0.0;
|
|
audioEndTimestamp = 0.0;
|
|
lastFrameDecodeTime = 0.0;
|
|
stoppedForLateFrame = false;
|
|
prebufferingAudio = false;
|
|
|
|
// Abort all queued actions
|
|
actionQueue.splice(0, actionQueue.length);
|
|
|
|
if (stream) {
|
|
// @todo fire an abort event if still loading
|
|
// @todo fire an emptied event if previously had data
|
|
stream.abort();
|
|
stream = null;
|
|
streamEnded = false;
|
|
}
|
|
if (codec) {
|
|
codec.close();
|
|
codec = null;
|
|
pendingFrame = 0;
|
|
pendingAudio = 0;
|
|
dataEnded = false;
|
|
}
|
|
videoInfo = null;
|
|
audioInfo = null;
|
|
if (audioFeeder) {
|
|
audioFeeder.close();
|
|
audioFeeder = null;
|
|
}
|
|
if (nextProcessingTimer) {
|
|
clearTimeout(nextProcessingTimer);
|
|
nextProcessingTimer = null;
|
|
}
|
|
if (nextFrameTimer) {
|
|
clearTimeout(nextFrameTimer);
|
|
nextFrameTimer = null;
|
|
}
|
|
if (frameSink) {
|
|
frameSink.clear();
|
|
frameSink = null;
|
|
}
|
|
if (decodedFrames) {
|
|
decodedFrames = [];
|
|
}
|
|
if (pendingFrames) {
|
|
pendingFrames = [];
|
|
}
|
|
initialSeekTime = 0.0;
|
|
// @todo set playback position, may need to fire timeupdate if wasnt previously 0
|
|
initialPlaybackPosition = 0;
|
|
initialPlaybackOffset = 0;
|
|
duration = null; // do not fire durationchange
|
|
// timeline offset to 0?
|
|
}
|
|
|
|
var lastFrameTime = getTimestamp(),
|
|
frameEndTimestamp = 0.0,
|
|
audioEndTimestamp = 0.0,
|
|
decodedFrames = [],
|
|
pendingFrames = [];
|
|
var lastFrameDecodeTime = 0.0,
|
|
lastFrameVideoCpuTime = 0,
|
|
lastFrameAudioCpuTime = 0,
|
|
lastFrameDemuxerCpuTime = 0,
|
|
lastFrameDrawingTime = 0,
|
|
lastFrameBufferTime = 0,
|
|
lastFrameProxyTime = 0,
|
|
lastVideoCpuTime = 0,
|
|
lastAudioCpuTime = 0,
|
|
lastDemuxerCpuTime = 0,
|
|
lastBufferTime = 0,
|
|
lastProxyTime = 0,
|
|
lastDrawingTime = 0;
|
|
var lastFrameTimestamp = 0.0,
|
|
currentVideoCpuTime = 0.0;
|
|
|
|
var lastTimeUpdate = 0, // ms
|
|
timeUpdateInterval = 250; // ms
|
|
|
|
function doFrameComplete(data) {
|
|
data = data || {};
|
|
|
|
if (startedPlaybackInDocument && !document.body.contains(self)) {
|
|
// We've been de-parented since we last ran
|
|
// Stop playback at next opportunity!
|
|
setTimeout(function() {
|
|
self.stop();
|
|
}, 0);
|
|
}
|
|
|
|
var newFrameTimestamp = getTimestamp(),
|
|
wallClockTime = newFrameTimestamp - lastFrameTimestamp,
|
|
//jitter = wallClockTime - targetPerFrameTime;
|
|
jitter = actualPerFrameTime - targetPerFrameTime;
|
|
totalJitter += Math.abs(jitter);
|
|
playTime += wallClockTime;
|
|
|
|
var timing = {
|
|
cpuTime: lastFrameDecodeTime,
|
|
drawingTime: drawingTime - lastFrameDrawingTime,
|
|
bufferTime: bufferTime - lastFrameBufferTime,
|
|
proxyTime: proxyTime - lastFrameProxyTime,
|
|
|
|
demuxerTime: 0,
|
|
videoTime: 0,
|
|
audioTime: 0,
|
|
//clockTime: wallClockTime
|
|
clockTime: actualPerFrameTime,
|
|
|
|
late: stoppedForLateFrame || data.dropped,
|
|
dropped: data.dropped
|
|
};
|
|
if (codec) {
|
|
timing.demuxerTime = (codec.demuxerCpuTime - lastFrameDemuxerCpuTime);
|
|
timing.videoTime += (currentVideoCpuTime - lastFrameVideoCpuTime);
|
|
timing.audioTime += (codec.audioCpuTime - lastFrameAudioCpuTime);
|
|
}
|
|
timing.cpuTime += timing.demuxerTime;
|
|
lastFrameDecodeTime = 0;
|
|
lastFrameTimestamp = newFrameTimestamp;
|
|
if (codec) {
|
|
lastFrameVideoCpuTime = currentVideoCpuTime;
|
|
lastFrameAudioCpuTime = codec.audioCpuTime;
|
|
lastFrameDemuxerCpuTime = codec.demuxerCpuTime;
|
|
} else {
|
|
lastFrameVideoCpuTime = 0;
|
|
lastFrameAudioCpuTime = 0;
|
|
lastFrameDemuxerCpuTime = 0;
|
|
}
|
|
lastFrameDrawingTime = drawingTime;
|
|
lastFrameBufferTime = bufferTime;
|
|
lastFrameProxyTime = proxyTime;
|
|
|
|
function n(x) {
|
|
return Math.round(x * 10) / 10;
|
|
}
|
|
log('drew frame ' + data.frameEndTimestamp + ': ' +
|
|
'clock time ' + n(wallClockTime) + ' (jitter ' + n(jitter) + ') ' +
|
|
'cpu: ' + n(timing.cpuTime) + ' (mux: ' + n(timing.demuxerTime) + ' buf: ' + n(timing.bufferTime) + ' draw: ' + n(timing.drawingTime) + ' proxy: ' + n(timing.proxyTime) + ') ' +
|
|
'vid: ' + n(timing.videoTime) + ' aud: ' + n(timing.audioTime));
|
|
fireEventAsync('framecallback', timing);
|
|
|
|
if (!lastTimeUpdate || (newFrameTimestamp - lastTimeUpdate) >= timeUpdateInterval) {
|
|
lastTimeUpdate = newFrameTimestamp;
|
|
fireEventAsync('timeupdate');
|
|
}
|
|
}
|
|
|
|
|
|
// -- seek functions
|
|
var seekTargetTime = 0.0,
|
|
seekTargetKeypoint = 0.0,
|
|
bisectTargetTime = 0.0,
|
|
seekMode,
|
|
lastSeekPosition,
|
|
lastFrameSkipped,
|
|
seekBisector,
|
|
didSeek;
|
|
|
|
var SeekMode = {
|
|
EXACT: "exact",
|
|
FAST: "fast"
|
|
};
|
|
|
|
function Cancel(msg) {
|
|
Error.call(this, msg);
|
|
}
|
|
Cancel.prototype = Object.create(Error);
|
|
|
|
function seekStream(offset) {
|
|
if (stream.seeking) {
|
|
seekCancel.cancel(new Cancel('cancel for new seek'));
|
|
}
|
|
if (stream.buffering) {
|
|
readCancel.cancel(new Cancel('cancel for new seek'));
|
|
}
|
|
streamEnded = false;
|
|
dataEnded = false;
|
|
ended = false;
|
|
stream.seek(offset, seekCancel).then(function() {
|
|
readBytesAndWait();
|
|
}).catch(onStreamError);
|
|
}
|
|
|
|
function startBisection(targetTime) {
|
|
// leave room for potentially long Ogg page syncing
|
|
var endPoint = Math.max(0, stream.length - 65536);
|
|
|
|
bisectTargetTime = targetTime;
|
|
seekBisector = new Bisector({
|
|
start: 0,
|
|
end: endPoint,
|
|
process: function(start, end, position) {
|
|
if (position == lastSeekPosition) {
|
|
return false;
|
|
} else {
|
|
lastSeekPosition = position;
|
|
lastFrameSkipped = false;
|
|
codec.flush(function() {
|
|
seekStream(position);
|
|
});
|
|
return true;
|
|
}
|
|
}
|
|
});
|
|
seekBisector.start();
|
|
}
|
|
|
|
function seek(toTime, mode) {
|
|
log('requested seek to ' + toTime + ', mode ' + mode);
|
|
|
|
if (self.readyState == self.HAVE_NOTHING) {
|
|
log('not yet loaded; saving seek position for later');
|
|
initialSeekTime = toTime;
|
|
return;
|
|
}
|
|
|
|
if (stream && !stream.seekable) {
|
|
console.log(stream)
|
|
throw new Error('Cannot seek a non-seekable stream');
|
|
}
|
|
|
|
function prepForSeek(callback) {
|
|
if (stream && stream.buffering) {
|
|
readCancel.cancel(new Cancel('cancel for new seek'));
|
|
}
|
|
if (stream && stream.seeking) {
|
|
seekCancel.cancel(new Cancel('cancel for new seek'));
|
|
}
|
|
// clear any queued input/seek-start
|
|
actionQueue.splice(0, actionQueue.length);
|
|
stopPlayback();
|
|
prebufferingAudio = false;
|
|
stoppedForLateFrame = false;
|
|
if (audioFeeder) {
|
|
audioFeeder.flush();
|
|
}
|
|
state = State.SEEKING;
|
|
seekTargetTime = toTime;
|
|
seekMode = mode;
|
|
if (codec) {
|
|
codec.flush(callback);
|
|
} else {
|
|
callback();
|
|
}
|
|
}
|
|
|
|
// Abort any previous seek or play suitably
|
|
prepForSeek(function() {
|
|
if (isProcessing()) {
|
|
// already waiting on input
|
|
} else {
|
|
// start up the new load *after* event loop churn
|
|
pingProcessing(0);
|
|
}
|
|
});
|
|
|
|
actionQueue.push(function() {
|
|
// Just in case another async task stopped us...
|
|
prepForSeek(function() {
|
|
doSeek(toTime)
|
|
});
|
|
});
|
|
}
|
|
|
|
function doSeek(toTime) {
|
|
streamEnded = false;
|
|
dataEnded = false;
|
|
ended = false;
|
|
state = State.SEEKING;
|
|
seekTargetTime = toTime;
|
|
seekTargetKeypoint = -1;
|
|
lastFrameSkipped = false;
|
|
lastSeekPosition = -1;
|
|
|
|
decodedFrames = [];
|
|
pendingFrames = [];
|
|
pendingFrame = 0;
|
|
pendingAudio = 0;
|
|
|
|
didSeek = false;
|
|
codec.seekToKeypoint(toTime, function(seeking) {
|
|
if (seeking) {
|
|
seekState = SeekState.LINEAR_TO_TARGET;
|
|
fireEventAsync('seeking');
|
|
|
|
if (didSeek) {
|
|
// wait for i/o to trigger readBytesAndWait
|
|
return;
|
|
} else {
|
|
pingProcessing();
|
|
return;
|
|
}
|
|
}
|
|
// Use the old interface still implemented on ogg demuxer
|
|
codec.getKeypointOffset(toTime, function(offset) {
|
|
if (offset > 0) {
|
|
// This file has an index!
|
|
//
|
|
// Start at the keypoint, then decode forward to the desired time.
|
|
//
|
|
seekState = SeekState.LINEAR_TO_TARGET;
|
|
seekStream(offset);
|
|
} else {
|
|
// No index.
|
|
//
|
|
// Bisect through the file finding our target time, then we'll
|
|
// have to do it again to reach the keypoint, and *then* we'll
|
|
// have to decode forward back to the desired time.
|
|
//
|
|
seekState = SeekState.BISECT_TO_TARGET;
|
|
startBisection(seekTargetTime);
|
|
}
|
|
|
|
fireEventAsync('seeking');
|
|
});
|
|
});
|
|
}
|
|
|
|
function continueSeekedPlayback() {
|
|
seekState = SeekState.NOT_SEEKING;
|
|
state = State.READY;
|
|
frameEndTimestamp = codec.frameTimestamp;
|
|
audioEndTimestamp = codec.audioTimestamp;
|
|
if (codec.hasAudio) {
|
|
seekTargetTime = codec.audioTimestamp;
|
|
} else {
|
|
seekTargetTime = codec.frameTimestamp;
|
|
}
|
|
initialPlaybackOffset = seekTargetTime;
|
|
|
|
function finishedSeeking() {
|
|
lastTimeUpdate = seekTargetTime;
|
|
fireEventAsync('timeupdate');
|
|
fireEventAsync('seeked');
|
|
if (isProcessing()) {
|
|
// wait for whatever's going on to complete
|
|
} else {
|
|
pingProcessing();
|
|
}
|
|
}
|
|
|
|
// Decode and show first frame immediately
|
|
if (codec.hasVideo && codec.frameReady) {
|
|
// hack! move this into the main loop when retooling
|
|
// to avoid maintaining this double draw
|
|
codec.decodeFrame(function(ok) {
|
|
if (ok) {
|
|
if (thumbnail) {
|
|
self.removeChild(thumbnail);
|
|
thumbnail = null;
|
|
}
|
|
frameSink.drawFrame(codec.frameBuffer);
|
|
}
|
|
finishedSeeking();
|
|
} );
|
|
return;
|
|
} else {
|
|
finishedSeeking();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return {boolean} true to continue processing, false to wait for input data
|
|
*/
|
|
function doProcessLinearSeeking() {
|
|
var frameDuration;
|
|
if (codec.hasVideo) {
|
|
frameDuration = targetPerFrameTime / 1000;
|
|
} else {
|
|
frameDuration = 1 / 256; // approximate packet audio size, fake!
|
|
}
|
|
|
|
if (codec.hasVideo) {
|
|
if (pendingFrame) {
|
|
// wait
|
|
return;
|
|
} else if (!codec.frameReady) {
|
|
// Haven't found a frame yet, process more data
|
|
codec.process(function(more) {
|
|
if (more) {
|
|
// need more packets
|
|
pingProcessing();
|
|
} else if (streamEnded) {
|
|
log('stream ended during linear seeking on video');
|
|
dataEnded = true;
|
|
continueSeekedPlayback();
|
|
} else {
|
|
readBytesAndWait();
|
|
}
|
|
});
|
|
return;
|
|
} else if (seekMode === SeekMode.FAST && codec.keyframeTimestamp == codec.frameTimestamp) {
|
|
// Found some frames? Go ahead now!
|
|
continueSeekedPlayback();
|
|
return;
|
|
} else if (codec.frameTimestamp + frameDuration < seekTargetTime) {
|
|
// Haven't found a time yet, or haven't reached the target time.
|
|
// Decode it in case we're at our keyframe or a following intraframe...
|
|
codec.decodeFrame(function() {
|
|
pingProcessing();
|
|
});
|
|
return;
|
|
} else {
|
|
// Reached or surpassed the target time.
|
|
if (codec.hasAudio) {
|
|
// Keep processing the audio track
|
|
// fall through...
|
|
} else {
|
|
continueSeekedPlayback();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
if (codec.hasAudio) {
|
|
if (pendingAudio) {
|
|
// wait
|
|
return;
|
|
} if (!codec.audioReady) {
|
|
// Haven't found an audio packet yet, process more data
|
|
codec.process(function(more) {
|
|
if (more) {
|
|
// need more packets
|
|
pingProcessing();
|
|
} else if (streamEnded) {
|
|
log('stream ended during linear seeking on audio');
|
|
dataEnded = true;
|
|
continueSeekedPlayback();
|
|
} else {
|
|
readBytesAndWait();
|
|
}
|
|
});
|
|
return;
|
|
} else if (codec.audioTimestamp + frameDuration < seekTargetTime) {
|
|
// Haven't found a time yet, or haven't reached the target time.
|
|
// Decode it so when we reach the target we've got consistent data.
|
|
codec.decodeAudio(function() {
|
|
pingProcessing();
|
|
});
|
|
return;
|
|
} else {
|
|
continueSeekedPlayback();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
function doProcessBisectionSeek() {
|
|
var frameDuration,
|
|
timestamp;
|
|
if (codec.hasVideo) {
|
|
timestamp = codec.frameTimestamp;
|
|
frameDuration = targetPerFrameTime / 1000;
|
|
} else if (codec.hasAudio) {
|
|
timestamp = codec.audioTimestamp;
|
|
frameDuration = 1 / 256; // approximate packet audio size, fake!
|
|
} else {
|
|
throw new Error('Invalid seek state; no audio or video track available');
|
|
}
|
|
|
|
if (timestamp < 0) {
|
|
// Haven't found a packet yet.
|
|
codec.process(function(more) {
|
|
if (more) {
|
|
// need more data
|
|
pingProcessing();
|
|
} else if (streamEnded) {
|
|
log('stream ended during bisection seek');
|
|
// We may have to go back further to find packets.
|
|
if (seekBisector.right()) {
|
|
// wait for new data to come in
|
|
} else {
|
|
log('failed going back');
|
|
throw new Error('not sure what to do');
|
|
}
|
|
} else {
|
|
readBytesAndWait();
|
|
}
|
|
});
|
|
} else if (timestamp - frameDuration / 2 > bisectTargetTime) {
|
|
if (seekBisector.left()) {
|
|
// wait for new data to come in
|
|
} else {
|
|
log('close enough (left)');
|
|
|
|
// We're having trouble finding a new packet position;
|
|
// likely it's an audio file with lots of small packets.
|
|
// Since we can't find an earlier packet, just continue here.
|
|
seekTargetTime = timestamp;
|
|
continueSeekedPlayback();
|
|
}
|
|
} else if (timestamp + frameDuration / 2 < bisectTargetTime) {
|
|
if (seekBisector.right()) {
|
|
// wait for new data to come in
|
|
} else {
|
|
log('close enough (right)');
|
|
|
|
// We're having trouble finding a new packet position;
|
|
// likely it's an audio file with lots of small packets.
|
|
// Switch to linear mode to find the final target.
|
|
seekState = SeekState.LINEAR_TO_TARGET;
|
|
pingProcessing();
|
|
}
|
|
} else {
|
|
// Reached the bisection target!
|
|
if (seekState == SeekState.BISECT_TO_TARGET && (codec.hasVideo && codec.keyframeTimestamp < codec.frameTimestamp)) {
|
|
// We have to go back and find a keyframe. Sigh.
|
|
log('finding the keypoint now');
|
|
seekState = SeekState.BISECT_TO_KEYPOINT;
|
|
startBisection(codec.keyframeTimestamp);
|
|
} else {
|
|
log('straight seeking now');
|
|
// Switch to linear mode to find the final target.
|
|
seekState = SeekState.LINEAR_TO_TARGET;
|
|
pingProcessing();
|
|
}
|
|
}
|
|
}
|
|
|
|
function setupVideo() {
|
|
if (videoInfo.fps > 0) {
|
|
targetPerFrameTime = 1000 / videoInfo.fps;
|
|
} else {
|
|
targetPerFrameTime = 16.667; // recalc this later
|
|
}
|
|
|
|
canvas.width = videoInfo.displayWidth;
|
|
canvas.height = videoInfo.displayHeight;
|
|
OGVPlayer.styleManager.appendRule('.' + instanceId, {
|
|
width: videoInfo.displayWidth + 'px',
|
|
height: videoInfo.displayHeight + 'px'
|
|
});
|
|
OGVPlayer.updatePositionOnResize();
|
|
|
|
frameSink = YUVCanvas.attach(canvas, canvasOptions);
|
|
}
|
|
|
|
var depth = 0,
|
|
needProcessing = false,
|
|
pendingFrame = 0,
|
|
pendingAudio = 0,
|
|
framePipelineDepth = 3,
|
|
audioPipelineDepth = 4;
|
|
|
|
function doProcessing() {
|
|
if (didSeek) {
|
|
didSeek = false;
|
|
}
|
|
nextProcessingTimer = null;
|
|
|
|
if (isProcessing()) {
|
|
// Called async while waiting for something else to complete...
|
|
// let it finish, then we'll get called again to continue.
|
|
//return;
|
|
//throw new Error('REENTRANCY FAIL: doProcessing during processing');
|
|
}
|
|
|
|
if (depth > 0) {
|
|
throw new Error('REENTRANCY FAIL: doProcessing recursing unexpectedly');
|
|
}
|
|
var iters = 0;
|
|
do {
|
|
needProcessing = false;
|
|
depth++;
|
|
doProcessingLoop();
|
|
depth--;
|
|
|
|
if (needProcessing && isProcessing()) {
|
|
throw new Error('REENTRANCY FAIL: waiting on input or codec but asked to keep processing');
|
|
}
|
|
if (++iters > 500) {
|
|
log('stuck in processing loop; breaking with timer');
|
|
needProcessing = 0;
|
|
pingProcessing(0);
|
|
}
|
|
} while (needProcessing);
|
|
}
|
|
|
|
function doProcessingLoop() {
|
|
|
|
if (actionQueue.length) {
|
|
// data or user i/o to process in our serialized event stream
|
|
// The function should eventually bring us back here via pingProcessing(),
|
|
// directly or via further i/o.
|
|
|
|
var action = actionQueue.shift();
|
|
action();
|
|
|
|
} else if (state == State.INITIAL) {
|
|
|
|
if (codec.loadedMetadata) {
|
|
// we just fell over from headers into content; call onloadedmetadata etc
|
|
if (!codec.hasVideo && !codec.hasAudio) {
|
|
throw new Error('No audio or video found, something is wrong');
|
|
}
|
|
if (codec.hasAudio) {
|
|
audioInfo = codec.audioFormat;
|
|
}
|
|
if (codec.hasVideo) {
|
|
videoInfo = codec.videoFormat;
|
|
setupVideo();
|
|
}
|
|
if (!isNaN(codec.duration)) {
|
|
duration = codec.duration;
|
|
}
|
|
if (duration === null) {
|
|
if (stream.seekable) {
|
|
state = State.SEEKING_END;
|
|
lastSeenTimestamp = -1;
|
|
codec.flush(function() {
|
|
seekStream(Math.max(0, stream.length - 65536 * 2));
|
|
});
|
|
} else {
|
|
// Stream not seekable and no x-content-duration; assuming infinite stream.
|
|
state = State.LOADED;
|
|
pingProcessing();
|
|
}
|
|
} else {
|
|
// We already know the duration.
|
|
state = State.LOADED;
|
|
pingProcessing();
|
|
}
|
|
} else {
|
|
codec.process(function processInitial(more) {
|
|
if (more) {
|
|
// Keep processing headers
|
|
pingProcessing();
|
|
} else if (streamEnded) {
|
|
throw new Error('end of file before headers found');
|
|
} else {
|
|
// Read more data!
|
|
log('reading more cause we are out of data');
|
|
readBytesAndWait();
|
|
}
|
|
});
|
|
}
|
|
|
|
} else if (state == State.SEEKING_END) {
|
|
|
|
// Look for the last item.
|
|
if (codec.frameReady) {
|
|
log('saw frame with ' + codec.frameTimestamp);
|
|
lastSeenTimestamp = Math.max(lastSeenTimestamp, codec.frameTimestamp);
|
|
codec.discardFrame(function() {
|
|
pingProcessing();
|
|
});
|
|
} else if (codec.audioReady) {
|
|
log('saw audio with ' + codec.audioTimestamp);
|
|
lastSeenTimestamp = Math.max(lastSeenTimestamp, codec.audioTimestamp);
|
|
codec.discardAudio(function() {
|
|
pingProcessing();
|
|
});
|
|
} else {
|
|
codec.process(function processSeekingEnd(more) {
|
|
if (more) {
|
|
// Keep processing headers
|
|
pingProcessing();
|
|
} else {
|
|
// Read more data!
|
|
if (!stream.eof) {
|
|
readBytesAndWait();
|
|
} else {
|
|
// We are at the end!
|
|
log('seek-duration: we are at the end: ' + lastSeenTimestamp);
|
|
if (lastSeenTimestamp > 0) {
|
|
duration = lastSeenTimestamp;
|
|
}
|
|
|
|
// Ok, seek back to the beginning and resync the streams.
|
|
state = State.LOADED;
|
|
codec.flush(function() {
|
|
streamEnded = false;
|
|
dataEnded = false;
|
|
seekStream(0);
|
|
});
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
} else if (state == State.LOADED) {
|
|
|
|
state = State.PRELOAD;
|
|
fireEventAsync('loadedmetadata');
|
|
fireEventAsync('durationchange');
|
|
if (codec.hasVideo) {
|
|
fireEventAsync('resize');
|
|
}
|
|
pingProcessing(0);
|
|
|
|
} else if (state == State.PRELOAD) {
|
|
|
|
if ((codec.frameReady || !codec.hasVideo) &&
|
|
(codec.audioReady || !codec.hasAudio)) {
|
|
|
|
state = State.READY;
|
|
fireEventAsync('loadeddata');
|
|
pingProcessing();
|
|
} else {
|
|
codec.process(function doProcessPreload(more) {
|
|
if (more) {
|
|
pingProcessing();
|
|
} else if (streamEnded) {
|
|
// Ran out of data before data available...?
|
|
ended = true;
|
|
} else {
|
|
readBytesAndWait();
|
|
}
|
|
});
|
|
}
|
|
|
|
} else if (state == State.READY) {
|
|
log('initial seek to ' + initialSeekTime);
|
|
|
|
if (initialSeekTime > 0) {
|
|
|
|
var target = initialSeekTime;
|
|
initialSeekTime = 0;
|
|
log('initial seek to ' + target);
|
|
doSeek(target);
|
|
|
|
} else if (paused) {
|
|
|
|
// Paused? stop here.
|
|
log('paused while in ready');
|
|
|
|
} else {
|
|
|
|
function finishStartPlaying() {
|
|
log('finishStartPlaying');
|
|
|
|
state = State.PLAYING;
|
|
lastFrameTimestamp = getTimestamp();
|
|
|
|
if (codec.hasAudio && audioFeeder) {
|
|
// Pre-queue audio before we start the clock
|
|
prebufferingAudio = true;
|
|
} else {
|
|
startPlayback();
|
|
}
|
|
pingProcessing(0);
|
|
fireEventAsync('play');
|
|
fireEventAsync('playing');
|
|
}
|
|
|
|
if (codec.hasAudio && !audioFeeder && !muted) {
|
|
initAudioFeeder();
|
|
audioFeeder.waitUntilReady(finishStartPlaying);
|
|
} else {
|
|
finishStartPlaying();
|
|
}
|
|
}
|
|
|
|
} else if (state == State.SEEKING) {
|
|
|
|
if (seekState == SeekState.NOT_SEEKING) {
|
|
throw new Error('seeking in invalid state (not seeking?)');
|
|
} else if (seekState == SeekState.BISECT_TO_TARGET) {
|
|
doProcessBisectionSeek();
|
|
} else if (seekState == SeekState.BISECT_TO_KEYPOINT) {
|
|
doProcessBisectionSeek();
|
|
} else if (seekState == SeekState.LINEAR_TO_TARGET) {
|
|
doProcessLinearSeeking();
|
|
} else {
|
|
throw new Error('Invalid seek state ' + seekState);
|
|
}
|
|
|
|
} else if (state == State.PLAYING) {
|
|
|
|
function doProcessPlay() {
|
|
|
|
//console.log(more, codec.audioReady, codec.frameReady, codec.audioTimestamp, codec.frameTimestamp);
|
|
|
|
if (paused) {
|
|
|
|
// ok we're done for now!
|
|
log('paused during playback; stopping loop');
|
|
|
|
} else {
|
|
|
|
if ((!codec.hasAudio || codec.audioReady || pendingAudio || dataEnded) &&
|
|
(!codec.hasVideo || codec.frameReady || pendingFrame || decodedFrames.length || dataEnded)
|
|
) {
|
|
|
|
var audioState = null,
|
|
playbackPosition = 0,
|
|
readyForAudioDecode,
|
|
audioEnded = false,
|
|
readyForFrameDraw,
|
|
frameDelay = 0,
|
|
readyForFrameDecode,
|
|
// timers never fire earlier than 4ms
|
|
timerMinimum = 4,
|
|
// ok to draw a couple ms early
|
|
fudgeDelta = timerMinimum;
|
|
|
|
|
|
if (codec.hasAudio && audioFeeder) {
|
|
// Drive on the audio clock!
|
|
|
|
audioState = audioFeeder.getPlaybackState();
|
|
playbackPosition = getPlaybackTime(audioState);
|
|
audioEnded = (dataEnded && audioFeeder.durationBuffered == 0);
|
|
|
|
if (prebufferingAudio && (audioFeeder.durationBuffered >= audioFeeder.bufferThreshold * 2 || dataEnded)) {
|
|
log('prebuffering audio done; buffered to ' + audioFeeder.durationBuffered);
|
|
startPlayback(playbackPosition);
|
|
prebufferingAudio = false;
|
|
}
|
|
|
|
if (audioState.dropped != droppedAudio) {
|
|
log('dropped ' + (audioState.dropped - droppedAudio));
|
|
}
|
|
if (audioState.delayed != delayedAudio) {
|
|
log('delayed ' + (audioState.delayed - delayedAudio));
|
|
}
|
|
droppedAudio = audioState.dropped;
|
|
delayedAudio = audioState.delayed;
|
|
|
|
readyForAudioDecode = audioFeeder.durationBuffered <=
|
|
audioFeeder.bufferThreshold * 2;
|
|
|
|
if (!readyForAudioDecode) {
|
|
// just to skip the remaining items in debug log
|
|
} else if (!codec.audioReady) {
|
|
// NEED MOAR BUFFERS
|
|
readyForAudioDecode = false;
|
|
} else if (pendingAudio >= audioPipelineDepth) {
|
|
// We'll check in when done decoding
|
|
log('audio decode disabled: ' + pendingAudio + ' packets in flight');
|
|
readyForAudioDecode = false;
|
|
}
|
|
|
|
} else {
|
|
// No audio; drive on the general clock.
|
|
// @fixme account for dropped frame times...
|
|
playbackPosition = getPlaybackTime();
|
|
|
|
// If playing muted with no audio output device,
|
|
// just keep up with audio in general.
|
|
readyForAudioDecode = codec.audioReady && (audioEndTimestamp < playbackPosition);
|
|
}
|
|
|
|
if (codec.hasVideo) {
|
|
readyForFrameDraw = decodedFrames.length > 0;
|
|
readyForFrameDecode = (pendingFrame + decodedFrames.length < framePipelineDepth) && codec.frameReady;
|
|
|
|
if (readyForFrameDraw) {
|
|
frameDelay = (decodedFrames[0].frameEndTimestamp - playbackPosition) * 1000;
|
|
actualPerFrameTime = targetPerFrameTime - frameDelay;
|
|
//frameDelay = Math.max(0, frameDelay);
|
|
//frameDelay = Math.min(frameDelay, targetPerFrameTime);
|
|
}
|
|
|
|
var audioSyncThreshold = targetPerFrameTime;
|
|
if (prebufferingAudio) {
|
|
if (readyForFrameDecode) {
|
|
log('decoding a frame during prebuffering');
|
|
}
|
|
readyForFrameDraw = false;
|
|
} else if (readyForFrameDraw && dataEnded && audioEnded) {
|
|
// If audio timeline reached end, make sure the last frame draws
|
|
log('audio timeline ended? ready to draw frame');
|
|
} else if (readyForFrameDraw && -frameDelay >= audioSyncThreshold) {
|
|
// late frame!
|
|
if (options.sync == 'delay-audio') {
|
|
// Delay audio while video catches up. Old default.
|
|
if (!stoppedForLateFrame) {
|
|
log('late frame at ' + playbackPosition + ': ' + (-frameDelay) + ' expected ' + audioSyncThreshold);
|
|
lateFrames++;
|
|
if (decodedFrames.length > 1) {
|
|
log('late frame has a neighbor; skipping to next frame');
|
|
var frame = decodedFrames.shift();
|
|
frameDelay = (frame.frameEndTimestamp - playbackPosition) * 1000;
|
|
actualPerFrameTime = targetPerFrameTime - frameDelay;
|
|
framesProcessed++; // pretend!
|
|
doFrameComplete({
|
|
frameEndTimestamp: frame.frameEndTimestamp,
|
|
dropped: true
|
|
});
|
|
} else {
|
|
stopPlayback();
|
|
stoppedForLateFrame = true;
|
|
}
|
|
}
|
|
} else if (options.sync == 'skip-frames') {
|
|
var skipPast = -1;
|
|
for (var i = 0; i < decodedFrames.length - 1; i++) {
|
|
if (decodedFrames[i].frameEndTimestamp < playbackPosition) {
|
|
skipPast = i - 1;
|
|
}
|
|
}
|
|
if (skipPast >= 0) {
|
|
while (skipPast-- >= 0) {
|
|
lateFrames++;
|
|
var frame = decodedFrames.shift();
|
|
log('skipping already-decoded late frame at ' + frame.frameEndTimestamp);
|
|
frameDelay = (frame.frameEndTimestamp - playbackPosition) * 1000;
|
|
frameEndTimestamp = frame.frameEndTimestamp;
|
|
actualPerFrameTime = targetPerFrameTime - frameDelay;
|
|
framesProcessed++; // pretend!
|
|
frame.dropped = true;
|
|
doFrameComplete();
|
|
}
|
|
}
|
|
|
|
// Resync at the next keyframe. Default as of 1.3.2.
|
|
var nextKeyframe = codec.nextKeyframeTimestamp;
|
|
|
|
// When resyncing, allow time to decode a couple frames!
|
|
var videoSyncPadding = (targetPerFrameTime / 1000) * (framePipelineDepth + pendingFrame);
|
|
var timeToResync = nextKeyframe - videoSyncPadding;
|
|
|
|
if (nextKeyframe >= 0 && nextKeyframe != codec.frameTimestamp && playbackPosition >= timeToResync) {
|
|
log('skipping late frame at ' + decodedFrames[0].frameEndTimestamp + ' vs ' + playbackPosition + ', expect to see keyframe at ' + nextKeyframe);
|
|
|
|
// First skip any already-decoded frames
|
|
for (var i = 0; i < decodedFrames.length; i++) {
|
|
var frame = decodedFrames[i];
|
|
lateFrames++;
|
|
framesProcessed++; // pretend!
|
|
frameEndTimestamp = frame.frameEndTimestamp;
|
|
frameDelay = (frame.frameEndTimestamp - playbackPosition) * 1000;
|
|
actualPerFrameTime = targetPerFrameTime - frameDelay;
|
|
frame.dropped = true;
|
|
doFrameComplete(frame);
|
|
}
|
|
decodedFrames = [];
|
|
for (var i = 0; i < pendingFrames.length; i++) {
|
|
var frame = pendingFrames[i];
|
|
lateFrames++;
|
|
framesProcessed++; // pretend!
|
|
frameEndTimestamp = frame.frameEndTimestamp;
|
|
frameDelay = (frame.frameEndTimestamp - playbackPosition) * 1000;
|
|
actualPerFrameTime = targetPerFrameTime - frameDelay;
|
|
frame.dropped = true;
|
|
doFrameComplete(frame);
|
|
}
|
|
pendingFrames = [];
|
|
pendingFrame = 0;
|
|
|
|
// Now discard anything up to the keyframe
|
|
while (codec.frameReady && codec.frameTimestamp < nextKeyframe) {
|
|
// note: this is a known synchronous operation :)
|
|
var frame = {
|
|
frameEndTimestamp: codec.frameTimestamp,
|
|
dropped: true
|
|
};
|
|
frameDelay = (frame.frameEndTimestamp - playbackPosition) * 1000;
|
|
actualPerFrameTime = targetPerFrameTime - frameDelay;
|
|
lateFrames++;
|
|
codec.discardFrame(function() {/*fake*/});
|
|
framesProcessed++; // pretend!
|
|
doFrameComplete(frame);
|
|
}
|
|
if (isProcessing()) {
|
|
// wait
|
|
} else {
|
|
pingProcessing();
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
} else if (readyForFrameDraw && stoppedForLateFrame && !readyForFrameDecode && !readyForAudioDecode && frameDelay > fudgeDelta) {
|
|
// catching up, ok if we were early
|
|
log('late frame recovery reached ' + frameDelay);
|
|
startPlayback(playbackPosition);
|
|
stoppedForLateFrame = false;
|
|
readyForFrameDraw = false; // go back through the loop again
|
|
} else if (readyForFrameDraw && stoppedForLateFrame) {
|
|
// draw asap
|
|
} else if (readyForFrameDraw && frameDelay <= fudgeDelta) {
|
|
// on time! draw
|
|
} else {
|
|
// not yet
|
|
readyForFrameDraw = false;
|
|
}
|
|
}
|
|
|
|
if (readyForFrameDecode) {
|
|
|
|
log('play loop: ready to decode frame; thread depth: ' + pendingFrame + ', have buffered: ' + decodedFrames.length);
|
|
|
|
if (videoInfo.fps == 0 && (codec.frameTimestamp - frameEndTimestamp) > 0) {
|
|
// WebM doesn't encode a frame rate
|
|
targetPerFrameTime = (codec.frameTimestamp - frameEndTimestamp) * 1000;
|
|
}
|
|
totalFrameTime += targetPerFrameTime;
|
|
totalFrameCount++;
|
|
|
|
var nextFrameEndTimestamp = frameEndTimestamp = codec.frameTimestamp;
|
|
pendingFrame++;
|
|
pendingFrames.push({
|
|
frameEndTimestamp: nextFrameEndTimestamp
|
|
});
|
|
var currentPendingFrames = pendingFrames;
|
|
var wasAsync = false;
|
|
var frameDecodeTime = time(function() {
|
|
codec.decodeFrame(function processingDecodeFrame(ok) {
|
|
if (currentPendingFrames !== pendingFrames) {
|
|
log('play loop callback after flush, discarding');
|
|
return;
|
|
}
|
|
log('play loop callback: decoded frame');
|
|
pendingFrame--;
|
|
pendingFrames.shift();
|
|
if (ok) {
|
|
// Save the buffer until it's time to draw
|
|
decodedFrames.push({
|
|
yCbCrBuffer: codec.frameBuffer,
|
|
videoCpuTime: codec.videoCpuTime,
|
|
frameEndTimestamp: nextFrameEndTimestamp
|
|
});
|
|
} else {
|
|
// Bad packet or something.
|
|
log('Bad video packet or something');
|
|
}
|
|
codec.process(function() {
|
|
if (isProcessing()) {
|
|
// wait
|
|
} else {
|
|
pingProcessing(wasAsync ? undefined : 0);
|
|
}
|
|
});
|
|
});
|
|
});
|
|
if (pendingFrame) {
|
|
wasAsync = true;
|
|
proxyTime += frameDecodeTime;
|
|
// We can process something else while that's running
|
|
pingProcessing();
|
|
}
|
|
|
|
} else if (readyForAudioDecode) {
|
|
|
|
log('play loop: ready for audio; depth: ' + pendingAudio);
|
|
|
|
pendingAudio++;
|
|
var nextAudioEndTimestamp = codec.audioTimestamp;
|
|
var audioDecodeTime = time(function() {
|
|
codec.decodeAudio(function processingDecodeAudio(ok) {
|
|
pendingAudio--;
|
|
log('play loop callback: decoded audio');
|
|
audioEndTimestamp = nextAudioEndTimestamp;
|
|
|
|
if (ok) {
|
|
var buffer = codec.audioBuffer;
|
|
if (buffer) {
|
|
// Keep track of how much time we spend queueing audio as well
|
|
// This is slow when using the Flash shim on IE 10/11
|
|
bufferTime += time(function() {
|
|
if (audioFeeder) {
|
|
audioFeeder.bufferData(buffer);
|
|
}
|
|
});
|
|
if (!codec.hasVideo) {
|
|
framesProcessed++; // pretend!
|
|
var frame = {
|
|
frameEndTimestamp: audioEndTimestamp
|
|
};
|
|
doFrameComplete(frame);
|
|
}
|
|
}
|
|
}
|
|
if (isProcessing()) {
|
|
// wait
|
|
} else {
|
|
pingProcessing();
|
|
}
|
|
});
|
|
});
|
|
if (pendingAudio) {
|
|
proxyTime += audioDecodeTime;
|
|
// We can process something else while that's running
|
|
if (codec.audioReady) {
|
|
pingProcessing();
|
|
} else {
|
|
// Trigger a demux immediately if we need it;
|
|
// audio processing is our mostly-idle time
|
|
doProcessPlayDemux();
|
|
}
|
|
}
|
|
|
|
} else if (readyForFrameDraw) {
|
|
|
|
log('play loop: ready to draw frame');
|
|
|
|
if (nextFrameTimer) {
|
|
clearTimeout(nextFrameTimer);
|
|
nextFrameTimer = null;
|
|
}
|
|
|
|
// Ready to draw the decoded frame...
|
|
if (thumbnail) {
|
|
self.removeChild(thumbnail);
|
|
thumbnail = null;
|
|
}
|
|
|
|
var frame = decodedFrames.shift();
|
|
currentVideoCpuTime = frame.videoCpuTime;
|
|
|
|
drawingTime += time(function() {
|
|
frameSink.drawFrame(frame.yCbCrBuffer);
|
|
});
|
|
|
|
framesProcessed++;
|
|
framesPlayed++;
|
|
|
|
doFrameComplete(frame);
|
|
|
|
pingProcessing();
|
|
|
|
} else if (decodedFrames.length && !nextFrameTimer && !prebufferingAudio) {
|
|
|
|
var targetTimer = frameDelay;
|
|
// @todo consider using requestAnimationFrame
|
|
log('play loop: setting a timer for drawing ' + targetTimer);
|
|
nextFrameTimer = setTimeout(function() {
|
|
nextFrameTimer = null;
|
|
pingProcessing();
|
|
}, targetTimer);
|
|
|
|
} else if (dataEnded && !(pendingAudio || pendingFrame || decodedFrames.length)) {
|
|
log('play loop: playback reached end of data ' + [pendingAudio, pendingFrame, decodedFrames.length]);
|
|
var finalDelay = 0;
|
|
if (codec.hasAudio && audioFeeder) {
|
|
finalDelay = audioFeeder.durationBuffered * 1000;
|
|
}
|
|
if (finalDelay > 0) {
|
|
log('play loop: ending pending ' + finalDelay + ' ms');
|
|
pingProcessing(Math.max(0, finalDelay));
|
|
} else {
|
|
log('play loop: ENDING NOW: playback time ' + getPlaybackTime() + '; frameEndTimestamp: ' + frameEndTimestamp);
|
|
stopPlayback();
|
|
stoppedForLateFrame = false;
|
|
prebufferingAudio = false;
|
|
initialPlaybackOffset = Math.max(audioEndTimestamp, frameEndTimestamp);
|
|
ended = true;
|
|
// @todo implement loop behavior
|
|
paused = true;
|
|
fireEventAsync('pause');
|
|
fireEventAsync('ended');
|
|
}
|
|
|
|
} else {
|
|
|
|
log('play loop: waiting on async/timers');
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
log('play loop: demuxing');
|
|
|
|
doProcessPlayDemux();
|
|
}
|
|
}
|
|
}
|
|
|
|
function doProcessPlayDemux() {
|
|
var wasFrameReady = codec.frameReady,
|
|
wasAudioReady = codec.audioReady;
|
|
codec.process(function doProcessPlayDemuxHandler(more) {
|
|
if ((codec.frameReady && !wasFrameReady) || (codec.audioReady && !wasAudioReady)) {
|
|
log('demuxer has packets');
|
|
pingProcessing();
|
|
} else if (more) {
|
|
// Have to process some more pages to find data.
|
|
log('demuxer processing to find more packets');
|
|
pingProcessing();
|
|
} else {
|
|
log('demuxer ran out of data');
|
|
if (!streamEnded) {
|
|
// Ran out of buffered input
|
|
log('demuxer loading more data');
|
|
readBytesAndWait();
|
|
} else {
|
|
// Ran out of stream!
|
|
log('demuxer reached end of data stream');
|
|
dataEnded = true;
|
|
pingProcessing();
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
doProcessPlay();
|
|
|
|
} else if (state == State.ERROR) {
|
|
|
|
// Nothing to do.
|
|
console.log("Reached error state. Sorry bout that.");
|
|
|
|
} else {
|
|
|
|
throw new Error('Unexpected OGVPlayer state ' + state);
|
|
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Are we waiting on an async operation that will return later?
|
|
*/
|
|
function isProcessing() {
|
|
return (stream && (stream.buffering || stream.seeking)) || (codec && codec.processing);
|
|
}
|
|
|
|
function readBytesAndWait() {
|
|
if (stream.buffering || stream.seeking) {
|
|
log('readBytesAndWait during i/o');
|
|
return;
|
|
}
|
|
// keep i/o size small to reduce CPU impact of demuxing on slow machines
|
|
// @todo make buffer size larger when packets are larger?
|
|
var bufferSize = 32768;
|
|
stream.read(bufferSize, readCancel).then(function(data) {
|
|
log('got input ' + [data.byteLength]);
|
|
|
|
if (data.byteLength) {
|
|
// Save chunk to pass into the codec's buffer
|
|
actionQueue.push(function doReceiveInput() {
|
|
codec.receiveInput(data, function() {
|
|
pingProcessing();
|
|
});
|
|
});
|
|
}
|
|
if (stream.eof) {
|
|
// @todo record doneness in networkState
|
|
log('stream is at end!');
|
|
streamEnded = true;
|
|
}
|
|
if (isProcessing()) {
|
|
// We're waiting on the codec already...
|
|
} else {
|
|
// Let the read/decode/draw loop know we're out!
|
|
pingProcessing();
|
|
}
|
|
}).catch(onStreamError);
|
|
}
|
|
|
|
function onStreamError(err) {
|
|
if (err instanceof Cancel) {
|
|
// do nothing
|
|
log('i/o promise canceled; ignoring');
|
|
} else {
|
|
log("i/o error: " + err);
|
|
mediaError = new OGVMediaError(OGVMediaError.MEDIA_ERR_NETWORK, '' + err);
|
|
state = State.ERROR;
|
|
stopPlayback();
|
|
}
|
|
}
|
|
|
|
function pingProcessing(delay) {
|
|
if (delay === undefined) {
|
|
delay = -1;
|
|
}
|
|
/*
|
|
if (isProcessing()) {
|
|
// We'll get pinged again when whatever we were doing returns...
|
|
log('REENTRANCY FAIL: asked to pingProcessing() while already waiting');
|
|
return;
|
|
}
|
|
*/
|
|
if (stream && stream.waiting) {
|
|
// wait for this input pls
|
|
log('waiting on input');
|
|
return;
|
|
}
|
|
if (nextProcessingTimer) {
|
|
log('canceling old processing timer');
|
|
clearTimeout(nextProcessingTimer);
|
|
nextProcessingTimer = null;
|
|
}
|
|
var fudge = -1 / 256;
|
|
if (delay > fudge) {
|
|
//log('pingProcessing delay: ' + delay);
|
|
nextProcessingTimer = setTimeout(function() {
|
|
// run through pingProcessing again to check
|
|
// in case some io started asynchronously in the meantime
|
|
pingProcessing();
|
|
}, delay);
|
|
} else if (depth) {
|
|
//log('pingProcessing tail call (' + delay + ')');
|
|
needProcessing = true;
|
|
} else {
|
|
doProcessing();
|
|
}
|
|
}
|
|
|
|
var videoInfo,
|
|
audioInfo;
|
|
|
|
function startProcessingVideo() {
|
|
if (started || codec) {
|
|
return;
|
|
}
|
|
|
|
framesProcessed = 0;
|
|
bufferTime = 0;
|
|
drawingTime = 0;
|
|
proxyTime = 0;
|
|
started = true;
|
|
ended = false;
|
|
|
|
codec = new codecClass(codecOptions);
|
|
lastVideoCpuTime = 0;
|
|
lastAudioCpuTime = 0;
|
|
lastDemuxerCpuTime = 0;
|
|
lastBufferTime = 0;
|
|
lastDrawingTime = 0;
|
|
lastProxyTime = 0;
|
|
lastFrameVideoCpuTime = 0;
|
|
lastFrameAudioCpuTime = 0;
|
|
lastFrameDemuxerCpuTime = 0;
|
|
lastFrameBufferTime = 0;
|
|
lastFrameProxyTime = 0;
|
|
lastFrameDrawingTime = 0;
|
|
currentVideoCpuTime = 0;
|
|
codec.onseek = function(offset) {
|
|
didSeek = true;
|
|
if (stream) {
|
|
seekStream(offset);
|
|
}
|
|
};
|
|
codec.init(function() {
|
|
readBytesAndWait();
|
|
});
|
|
}
|
|
|
|
function loadCodec(callback) {
|
|
// @todo use the demuxer and codec interfaces directly
|
|
|
|
// @todo fix detection proper
|
|
if (enableWebM && currentSrc.match(/\.webm$/i)) {
|
|
codecOptions.type = 'video/webm';
|
|
} else {
|
|
codecOptions.type = 'video/ogg';
|
|
}
|
|
|
|
codecClass = OGVWrapperCodec;
|
|
callback();
|
|
}
|
|
|
|
/**
|
|
* HTMLMediaElement load method
|
|
*
|
|
* https://www.w3.org/TR/html5/embedded-content-0.html#concept-media-load-algorithm
|
|
*/
|
|
self.load = function() {
|
|
prepForLoad();
|
|
};
|
|
|
|
function prepForLoad(preload) {
|
|
stopVideo();
|
|
|
|
function doLoad() {
|
|
// @todo networkState == NETWORK_LOADING
|
|
stream = new StreamFile({
|
|
url: self.src,
|
|
cacheSize: 16 * 1024 * 1024,
|
|
});
|
|
stream.load().then(function() {
|
|
loading = false;
|
|
|
|
// @todo handle failure / unrecognized type
|
|
|
|
currentSrc = self.src;
|
|
|
|
// Fire off the read/decode/draw loop...
|
|
byteLength = stream.seekable ? stream.length : 0;
|
|
|
|
// If we get X-Content-Duration, that's as good as an explicit hint
|
|
var durationHeader = stream.headers['x-content-duration'];
|
|
if (typeof durationHeader === 'string') {
|
|
duration = parseFloat(durationHeader);
|
|
}
|
|
loadCodec(startProcessingVideo);
|
|
}).catch(onStreamError);
|
|
}
|
|
|
|
// @todo networkState = self.NETWORK_NO_SOURCE;
|
|
// @todo show poster
|
|
// @todo set 'delay load event flag'
|
|
|
|
currentSrc = '';
|
|
loading = true;
|
|
actionQueue.push(function() {
|
|
if (preload && self.preload === 'none') {
|
|
// Done for now, we'll pick up if someone hits play() or load()
|
|
loading = false;
|
|
} else {
|
|
doLoad();
|
|
}
|
|
});
|
|
pingProcessing(0);
|
|
}
|
|
|
|
/**
|
|
* HTMLMediaElement canPlayType method
|
|
*/
|
|
self.canPlayType = function(contentType) {
|
|
var type = new OGVMediaType(contentType);
|
|
if (type.minor === 'ogg' &&
|
|
(type.major === 'audio' || type.major === 'video' || type.major === 'application')) {
|
|
if (type.codecs) {
|
|
var supported = ['vorbis', 'opus', 'theora'],
|
|
knownCodecs = 0,
|
|
unknownCodecs = 0;
|
|
type.codecs.forEach(function(codec) {
|
|
if (supported.indexOf(codec) >= 0) {
|
|
knownCodecs++;
|
|
} else {
|
|
unknownCodecs++;
|
|
}
|
|
});
|
|
if (knownCodecs === 0) {
|
|
return '';
|
|
} else if (unknownCodecs > 0) {
|
|
return '';
|
|
}
|
|
// All listed codecs are ones we know. Neat!
|
|
return 'probably';
|
|
} else {
|
|
return 'maybe';
|
|
}
|
|
} else {
|
|
// @todo when webm support is more complete, handle it
|
|
return '';
|
|
}
|
|
};
|
|
|
|
/**
|
|
* HTMLMediaElement play method
|
|
*/
|
|
self.play = function() {
|
|
if (!muted && !audioOptions.audioContext) {
|
|
OGVPlayer.initSharedAudioContext();
|
|
}
|
|
|
|
if (paused) {
|
|
startedPlaybackInDocument = document.body.contains(self);
|
|
|
|
paused = false;
|
|
|
|
if (state == State.SEEKING) {
|
|
|
|
// Seeking? Just make sure we know to pick up after.
|
|
|
|
} else if (started && codec && codec.loadedMetadata) {
|
|
|
|
if (ended && stream && byteLength) {
|
|
|
|
log('.play() starting over after end');
|
|
seek(0);
|
|
|
|
} else {
|
|
log('.play() while already started');
|
|
}
|
|
|
|
state = State.READY;
|
|
if (isProcessing()) {
|
|
// waiting on the codec already
|
|
} else {
|
|
pingProcessing();
|
|
}
|
|
|
|
} else if (loading) {
|
|
|
|
log('.play() while loading');
|
|
|
|
} else {
|
|
|
|
log('.play() before started');
|
|
|
|
// Let playback begin when metadata loading is complete
|
|
if (!stream) {
|
|
self.load();
|
|
}
|
|
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* custom getPlaybackStats method
|
|
*/
|
|
self.getPlaybackStats = function() {
|
|
return {
|
|
targetPerFrameTime: targetPerFrameTime,
|
|
framesProcessed: framesProcessed,
|
|
playTime: playTime,
|
|
demuxingTime: codec ? (codec.demuxerCpuTime - lastDemuxerCpuTime) : 0,
|
|
videoDecodingTime: codec ? (codec.videoCpuTime - lastVideoCpuTime) : 0,
|
|
audioDecodingTime: codec ? (codec.audioCpuTime - lastAudioCpuTime) : 0,
|
|
bufferTime: bufferTime - lastBufferTime,
|
|
drawingTime: drawingTime - lastDrawingTime,
|
|
proxyTime: proxyTime - lastProxyTime,
|
|
droppedAudio: droppedAudio,
|
|
delayedAudio: delayedAudio,
|
|
jitter: totalJitter / framesProcessed,
|
|
lateFrames: lateFrames
|
|
};
|
|
};
|
|
self.resetPlaybackStats = function() {
|
|
framesProcessed = 0;
|
|
playTime = 0;
|
|
if (codec) {
|
|
lastDemuxerCpuTime = codec.demuxerCpuTime;
|
|
lastVideoCpuTime = codec.videoCpuTime;
|
|
lastAudioCpuTime = codec.audioCpuTime;
|
|
}
|
|
lastBufferTime = bufferTime;
|
|
lastDrawingTime = drawingTime;
|
|
lastProxyTime = proxyTime;
|
|
totalJitter = 0;
|
|
totalFrameTime = 0;
|
|
totalFrameCount = 0;
|
|
};
|
|
|
|
self.getVideoFrameSink = function() {
|
|
return frameSink;
|
|
};
|
|
|
|
self.getCanvas = function() {
|
|
return canvas;
|
|
};
|
|
|
|
/**
|
|
* HTMLMediaElement pause method
|
|
*/
|
|
self.pause = function() {
|
|
if (!paused) {
|
|
clearTimeout(nextProcessingTimer);
|
|
nextProcessingTimer = null;
|
|
stopPlayback();
|
|
prebufferingAudio = false;
|
|
stoppedForLateFrame = false;
|
|
paused = true;
|
|
fireEvent('pause');
|
|
}
|
|
};
|
|
|
|
/**
|
|
* custom 'stop' method
|
|
*/
|
|
self.stop = function() {
|
|
stopVideo();
|
|
paused = true;
|
|
};
|
|
|
|
/**
|
|
* @todo implement the fast part of the behavior!
|
|
*/
|
|
self.fastSeek = function(seekToTime) {
|
|
seek(+seekToTime, SeekMode.FAST);
|
|
};
|
|
|
|
/**
|
|
* HTMLMediaElement src property
|
|
*/
|
|
Object.defineProperty(self, "src", {
|
|
get: function getSrc() {
|
|
return self.getAttribute('src') || '';
|
|
},
|
|
set: function setSrc(val) {
|
|
self.setAttribute('src', val);
|
|
loading = false; // just in case?
|
|
prepForLoad("interactive");
|
|
}
|
|
});
|
|
|
|
/**
|
|
* HTMLMediaElement buffered property
|
|
*/
|
|
Object.defineProperty(self, "buffered", {
|
|
get: function getBuffered() {
|
|
var ranges;
|
|
if (stream && byteLength && duration) {
|
|
ranges = stream.getBufferedRanges().map(function(range) {
|
|
return range.map(function(offset) {
|
|
return (offset / stream.length) * duration;
|
|
});
|
|
});
|
|
} else {
|
|
ranges = [[0, 0]];
|
|
}
|
|
return new OGVTimeRanges(ranges);
|
|
}
|
|
});
|
|
|
|
/**
|
|
* HTMLMediaElement seekable property
|
|
*/
|
|
Object.defineProperty(self, "seekable", {
|
|
get: function getSeekable() {
|
|
if (self.duration < Infinity && stream && stream.seekable && codec && codec.seekable) {
|
|
return new OGVTimeRanges([[0, duration]]);
|
|
} else {
|
|
return new OGVTimeRanges([]);
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* HTMLMediaElement currentTime property
|
|
*/
|
|
Object.defineProperty(self, "currentTime", {
|
|
get: function getCurrentTime() {
|
|
if (state == State.SEEKING) {
|
|
return seekTargetTime;
|
|
} else {
|
|
if (codec) {
|
|
if (state == State.PLAYING && !paused) {
|
|
return getPlaybackTime();
|
|
} else {
|
|
return initialPlaybackOffset;
|
|
}
|
|
} else {
|
|
return initialSeekTime;
|
|
}
|
|
}
|
|
},
|
|
set: function setCurrentTime(val) {
|
|
seek(val, SeekMode.EXACT);
|
|
}
|
|
});
|
|
|
|
/**
|
|
* HTMLMediaElement duration property
|
|
*/
|
|
Object.defineProperty(self, "duration", {
|
|
get: function getDuration() {
|
|
if (codec && codec.loadedMetadata) {
|
|
if (duration !== null) {
|
|
return duration;
|
|
} else {
|
|
return Infinity;
|
|
}
|
|
} else {
|
|
return NaN;
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* HTMLMediaElement paused property
|
|
*/
|
|
Object.defineProperty(self, "paused", {
|
|
get: function getPaused() {
|
|
return paused;
|
|
}
|
|
});
|
|
|
|
/**
|
|
* HTMLMediaElement ended property
|
|
*/
|
|
Object.defineProperty(self, "ended", {
|
|
get: function getEnded() {
|
|
return ended;
|
|
}
|
|
});
|
|
|
|
/**
|
|
* HTMLMediaElement ended property
|
|
*/
|
|
Object.defineProperty(self, "seeking", {
|
|
get: function getSeeking() {
|
|
return (state == State.SEEKING);
|
|
}
|
|
});
|
|
|
|
/**
|
|
* HTMLMediaElement muted property
|
|
*/
|
|
Object.defineProperty(self, "muted", {
|
|
get: function getMuted() {
|
|
return muted;
|
|
},
|
|
set: function setMuted(val) {
|
|
muted = val;
|
|
if (audioFeeder) {
|
|
audioFeeder.muted = muted;
|
|
} else if (started && !muted && codec && codec.hasAudio) {
|
|
log('unmuting: switching from timer to audio clock');
|
|
initAudioFeeder();
|
|
startPlayback(audioEndTimestamp);
|
|
}
|
|
fireEventAsync('volumechange');
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, "poster", {
|
|
get: function getPoster() {
|
|
return poster;
|
|
},
|
|
set: function setPoster(val) {
|
|
poster = val;
|
|
if (!started) {
|
|
if (thumbnail) {
|
|
self.removeChild(thumbnail);
|
|
}
|
|
thumbnail = new Image();
|
|
thumbnail.src = poster;
|
|
thumbnail.className = 'ogvjs-poster';
|
|
thumbnail.style.position = 'absolute';
|
|
thumbnail.style.top = '0';
|
|
thumbnail.style.left = '0';
|
|
thumbnail.style.width = '100%';
|
|
thumbnail.style.height = '100%';
|
|
thumbnail.style.objectFit = 'contain';
|
|
thumbnail.style.visibility = 'hidden';
|
|
thumbnail.addEventListener('load', function() {
|
|
if (thumbnail === this) {
|
|
OGVPlayer.styleManager.appendRule('.' + instanceId, {
|
|
width: thumbnail.naturalWidth + 'px',
|
|
height: thumbnail.naturalHeight + 'px'
|
|
});
|
|
OGVPlayer.updatePositionOnResize();
|
|
thumbnail.style.visibility = 'visible';
|
|
}
|
|
});
|
|
self.appendChild(thumbnail);
|
|
}
|
|
}
|
|
});
|
|
|
|
// Video metadata properties...
|
|
Object.defineProperty(self, "videoWidth", {
|
|
get: function getVideoWidth() {
|
|
if (videoInfo) {
|
|
return videoInfo.displayWidth;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
Object.defineProperty(self, "videoHeight", {
|
|
get: function getVideoHeight() {
|
|
if (videoInfo) {
|
|
return videoInfo.displayHeight;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
Object.defineProperty(self, "ogvjsVideoFrameRate", {
|
|
get: function getOgvJsVideoFrameRate() {
|
|
if (videoInfo) {
|
|
if (videoInfo.fps == 0) {
|
|
return totalFrameCount / (totalFrameTime / 1000);
|
|
} else {
|
|
return videoInfo.fps;
|
|
}
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
|
|
// Audio metadata properties...
|
|
Object.defineProperty(self, "ogvjsAudioChannels", {
|
|
get: function getOgvJsAudioChannels() {
|
|
if (audioInfo) {
|
|
return audioInfo.channels;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
Object.defineProperty(self, "ogvjsAudioSampleRate", {
|
|
get: function getOgvJsAudioChannels() {
|
|
if (audioInfo) {
|
|
return audioInfo.rate;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
|
|
// Display size...
|
|
var width = 0, height = 0;
|
|
/**
|
|
* @property width
|
|
* @todo reflect to the width attribute?
|
|
*/
|
|
Object.defineProperty(self, "width", {
|
|
get: function getWidth() {
|
|
return width;
|
|
},
|
|
set: function setWidth(val) {
|
|
width = parseInt(val, 10);
|
|
self.style.width = width + 'px';
|
|
OGVPlayer.updatePositionOnResize();
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @property height
|
|
* @todo reflect to the height attribute?
|
|
*/
|
|
Object.defineProperty(self, "height", {
|
|
get: function getHeight() {
|
|
return height;
|
|
},
|
|
set: function setHeight(val) {
|
|
height = parseInt(val, 10);
|
|
self.style.height = height + 'px';
|
|
OGVPlayer.updatePositionOnResize();
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @property autoplay {boolean} stub prop
|
|
* @todo reflect to the autoplay attribute?
|
|
* @todo implement actual autoplay behavior
|
|
*/
|
|
Object.defineProperty(self, "autoplay", {
|
|
get: function getAutoplay() {
|
|
return false;
|
|
},
|
|
set: function setAutoplay(val) {
|
|
// ignore
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @property controls {boolean} stub prop
|
|
* @todo reflect to the controls attribute?
|
|
* @todo implement actual control behavior
|
|
*/
|
|
Object.defineProperty(self, "controls", {
|
|
get: function getControls() {
|
|
return false;
|
|
},
|
|
set: function setControls(val) {
|
|
// ignore
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @property loop {boolean} stub prop
|
|
* @todo reflect to the controls attribute?
|
|
* @todo implement actual loop behavior
|
|
*/
|
|
Object.defineProperty(self, "loop", {
|
|
get: function getLoop() {
|
|
return false;
|
|
},
|
|
set: function setLoop(val) {
|
|
// ignore
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @property crossOrigin {string|null} stub prop
|
|
* @todo reflect to the crossorigin attribute?
|
|
* @todo implement actual behavior
|
|
*/
|
|
Object.defineProperty(self, "crossOrigin", {
|
|
get: function getCrossOrigin() {
|
|
return null;
|
|
},
|
|
set: function setCrossOrigin(val) {
|
|
// ignore
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Returns the URL to the currently-playing resource.
|
|
* @property currentSrc {string|null}
|
|
*/
|
|
Object.defineProperty(self, "currentSrc", {
|
|
get: function getCurrentSrc() {
|
|
// @todo return absolute URL per spec
|
|
return currentSrc;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, "defaultMuted", {
|
|
get: function getDefaultMuted() {
|
|
return false;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, "defaultPlaybackRate", {
|
|
get: function getDefaultPlaybackRate() {
|
|
return 1;
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @property error {string|null}
|
|
* @todo implement
|
|
*/
|
|
Object.defineProperty(self, "error", {
|
|
get: function getError() {
|
|
if (state === State.ERROR) {
|
|
if (mediaError) {
|
|
return mediaError;
|
|
} else {
|
|
return new OGVMediaError("unknown error occurred in media procesing");
|
|
}
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
});
|
|
/**
|
|
* @property preload {string}
|
|
*/
|
|
Object.defineProperty(self, "preload", {
|
|
get: function getPreload() {
|
|
return self.getAttribute('preload') || '';
|
|
},
|
|
set: function setPreload(val) {
|
|
self.setAttribute('preload', val);
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @property readyState {number}
|
|
* @todo return more accurate info about availability of data
|
|
*/
|
|
Object.defineProperty(self, "readyState", {
|
|
get: function getReadyState() {
|
|
if (stream && codec && codec.loadedMetadata) {
|
|
// for now we don't really calc this stuff
|
|
// just pretend we have lots of data coming in already
|
|
return OGVPlayer.HAVE_ENOUGH_DATA;
|
|
} else {
|
|
return OGVPlayer.HAVE_NOTHING;
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @property networkState {number}
|
|
* @todo implement
|
|
*/
|
|
Object.defineProperty(self, "networkState", {
|
|
get: function getNetworkState() {
|
|
if (stream) {
|
|
if (stream.waiting) {
|
|
return OGVPlayer.NETWORK_LOADING;
|
|
} else {
|
|
return OGVPlayer.NETWORK_IDLE;
|
|
}
|
|
} else {
|
|
if (self.readyState == OGVPlayer.HAVE_NOTHING) {
|
|
return OGVPlayer.NETWORK_EMPTY;
|
|
} else {
|
|
return OGVPlayer.NETWORK_NO_SOURCE;
|
|
}
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @property playbackRate {number}
|
|
* @todo implement
|
|
*/
|
|
Object.defineProperty(self, "playbackRate", {
|
|
get: function getPlaybackRate() {
|
|
return 1;
|
|
},
|
|
set: function setPlaybackRate(val) {
|
|
// ignore
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @property played {OGVTimeRanges}
|
|
* @todo implement correctly more or less
|
|
*/
|
|
Object.defineProperty(self, "played", {
|
|
get: function getPlayed() {
|
|
return new OGVTimeRanges([[0, self.currentTime]]);
|
|
}
|
|
});
|
|
|
|
var _volume = 1;
|
|
|
|
/**
|
|
* @property volume {number}
|
|
* @todo implement
|
|
*/
|
|
Object.defineProperty(self, "volume", {
|
|
get: function getVolume() {
|
|
return _volume;
|
|
},
|
|
set: function setVolume(val) {
|
|
_volume = +val;
|
|
if (audioFeeder) {
|
|
audioFeeder.volume = _volume;
|
|
}
|
|
fireEventAsync('volumechange');
|
|
}
|
|
});
|
|
|
|
|
|
// Events!
|
|
|
|
/**
|
|
* custom onframecallback, takes frame decode time in ms
|
|
*/
|
|
self.onframecallback = null;
|
|
|
|
/**
|
|
* Network state events
|
|
* @todo implement
|
|
*/
|
|
self.onloadstate = null;
|
|
self.onprogress = null;
|
|
self.onsuspend = null;
|
|
self.onabort = null;
|
|
self.onemptied = null;
|
|
self.onstalled = null;
|
|
|
|
/**
|
|
* Called when all metadata is available.
|
|
* Note in theory we must know 'duration' at this point.
|
|
*/
|
|
self.onloadedmetadata = null;
|
|
|
|
/**
|
|
* Called when enough data for first frame is ready.
|
|
* @todo implement
|
|
*/
|
|
self.onloadeddata = null;
|
|
|
|
/**
|
|
* Called when enough data is ready to start some playback.
|
|
* @todo implement
|
|
*/
|
|
self.oncanplay = null;
|
|
|
|
/**
|
|
* Called when enough data is ready to play through to the
|
|
* end if no surprises in network download rate.
|
|
* @todo implement
|
|
*/
|
|
self.oncanplaythrough = null;
|
|
|
|
/**
|
|
* Called when playback continues after a stall
|
|
* @todo implement
|
|
*/
|
|
self.onplaying = null;
|
|
|
|
/**
|
|
* Called when playback is delayed waiting on data
|
|
* @todo implement
|
|
*/
|
|
self.onwaiting = null;
|
|
|
|
/**
|
|
* Called when seeking begins
|
|
* @todo implement
|
|
*/
|
|
self.onseeking = null;
|
|
|
|
/**
|
|
* Called when seeking ends
|
|
* @todo implement
|
|
*/
|
|
self.onseeked = null;
|
|
|
|
/**
|
|
* Called when playback ends
|
|
*/
|
|
self.onended = null;
|
|
|
|
/**
|
|
* Called when duration becomes known
|
|
* @todo implement
|
|
*/
|
|
self.ondurationchange = null;
|
|
|
|
/**
|
|
* Called periodically during playback
|
|
*/
|
|
self.ontimeupdate = null;
|
|
|
|
/**
|
|
* Called when we start playback
|
|
*/
|
|
self.onplay = null;
|
|
|
|
/**
|
|
* Called when we get paused
|
|
*/
|
|
self.onpause = null;
|
|
|
|
/**
|
|
* Called when the playback rate changes
|
|
* @todo implement
|
|
*/
|
|
self.onratechange = null;
|
|
|
|
/**
|
|
* Called when the size of the video stream changes
|
|
* @todo implement
|
|
*/
|
|
self.onresize = null;
|
|
|
|
/**
|
|
* Called when the volume setting changes
|
|
* @todo implement
|
|
*/
|
|
self.onvolumechange = null;
|
|
|
|
return self;
|
|
};
|
|
|
|
OGVPlayer.initSharedAudioContext = function() {
|
|
AudioFeeder.initSharedAudioContext();
|
|
};
|
|
|
|
/**
|
|
* Set up constants on the class and instances
|
|
*/
|
|
var constants = {
|
|
/**
|
|
* Constants for networkState
|
|
*/
|
|
NETWORK_EMPTY: 0,
|
|
NETWORK_IDLE: 1,
|
|
NETWORK_LOADING: 2,
|
|
NETWORK_NO_SOURCE: 3,
|
|
|
|
/**
|
|
* Constants for readyState
|
|
*/
|
|
HAVE_NOTHING: 0,
|
|
HAVE_METADATA: 1,
|
|
HAVE_CURRENT_DATA: 2,
|
|
HAVE_FUTURE_DATA: 3,
|
|
HAVE_ENOUGH_DATA: 4
|
|
};
|
|
extend(OGVPlayer, constants);
|
|
|
|
OGVPlayer.instanceCount = 0;
|
|
|
|
function StyleManager() {
|
|
var self = this;
|
|
var el = document.createElement('style');
|
|
el.type = 'text/css';
|
|
el.textContent = 'ogvjs { ' +
|
|
'display: inline-block; ' +
|
|
'position: relative; ' +
|
|
'-webkit-user-select: none; ' +
|
|
'-webkit-tap-highlight-color: rgba(0,0,0,0); '
|
|
'}';
|
|
document.head.appendChild(el);
|
|
|
|
var sheet = el.sheet;
|
|
|
|
self.appendRule = function(selector, defs) {
|
|
var bits = [];
|
|
for (var prop in defs) {
|
|
if (defs.hasOwnProperty(prop)) {
|
|
bits.push(prop + ':' + defs[prop]);
|
|
}
|
|
}
|
|
var rule = selector + '{' + bits.join(';') + '}';
|
|
sheet.insertRule(rule, sheet.cssRules.length - 1);
|
|
};
|
|
}
|
|
OGVPlayer.styleManager = new StyleManager();
|
|
|
|
// IE 10/11 and Edge 12 don't support object-fit.
|
|
// Also just for fun, IE 10 doesn't support 'auto' sizing on canvas. o_O
|
|
OGVPlayer.supportsObjectFit = (typeof document.createElement('div').style.objectFit === 'string');
|
|
if (OGVPlayer.supportsObjectFit && navigator.userAgent.match(/iPhone|iPad|iPod Touch/)) {
|
|
// Safari for iOS 8/9 supports it but positions our <canvas> incorrectly when using WebGL >:(
|
|
OGVPlayer.supportsObjectFit = false;
|
|
}
|
|
if (OGVPlayer.supportsObjectFit) {
|
|
OGVPlayer.updatePositionOnResize = function() {
|
|
// no-op
|
|
};
|
|
} else {
|
|
OGVPlayer.updatePositionOnResize = function() {
|
|
function fixup(el, width, height) {
|
|
var container = el.offsetParent || el.parentNode,
|
|
containerAspect = container.offsetWidth / container.offsetHeight,
|
|
intrinsicAspect = width / height;
|
|
if (intrinsicAspect > containerAspect) {
|
|
var vsize = container.offsetWidth / intrinsicAspect,
|
|
vpad = (container.offsetHeight - vsize) / 2;
|
|
el.style.width = '100%';
|
|
el.style.height = vsize + 'px';
|
|
el.style.marginLeft = 0;
|
|
el.style.marginRight = 0;
|
|
el.style.marginTop = vpad + 'px';
|
|
el.style.marginBottom = vpad + 'px';
|
|
} else {
|
|
var hsize = container.offsetHeight * intrinsicAspect,
|
|
hpad = (container.offsetWidth - hsize) / 2;
|
|
el.style.width = hsize + 'px';
|
|
el.style.height = '100%';
|
|
el.style.marginLeft = hpad + 'px';
|
|
el.style.marginRight = hpad + 'px';
|
|
el.style.marginTop = 0;
|
|
el.style.marginBottom = 0;
|
|
}
|
|
}
|
|
function queryOver(selector, callback) {
|
|
var nodeList = document.querySelectorAll(selector),
|
|
nodeArray = Array.prototype.slice.call(nodeList);
|
|
nodeArray.forEach(callback);
|
|
}
|
|
|
|
queryOver('ogvjs > canvas', function(canvas) {
|
|
fixup(canvas, canvas.width, canvas.height);
|
|
});
|
|
queryOver('ogvjs > img', function(poster) {
|
|
fixup(poster, poster.naturalWidth, poster.naturalHeight);
|
|
});
|
|
};
|
|
var fullResizeVideo = function() {
|
|
// fullscreens may ping us before the resize happens
|
|
setTimeout(OGVPlayer.updatePositionOnResize, 0);
|
|
};
|
|
|
|
window.addEventListener('resize', OGVPlayer.updatePositionOnResize);
|
|
window.addEventListener('orientationchange', OGVPlayer.updatePositionOnResize);
|
|
|
|
document.addEventListener('fullscreenchange', fullResizeVideo);
|
|
document.addEventListener('mozfullscreenchange', fullResizeVideo);
|
|
document.addEventListener('webkitfullscreenchange', fullResizeVideo);
|
|
document.addEventListener('MSFullscreenChange', fullResizeVideo);
|
|
}
|
|
|
|
module.exports = OGVPlayer;
|
|
|
|
|
|
/***/ }),
|
|
/* 9 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
var require;/* WEBPACK VAR INJECTION */(function(process, global) {/*!
|
|
* @overview es6-promise - a tiny implementation of Promises/A+.
|
|
* @copyright Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors (Conversion to ES6 API by Jake Archibald)
|
|
* @license Licensed under MIT license
|
|
* See https://raw.githubusercontent.com/stefanpenner/es6-promise/master/LICENSE
|
|
* @version 4.1.0
|
|
*/
|
|
|
|
(function (global, factory) {
|
|
true ? module.exports = factory() :
|
|
typeof define === 'function' && define.amd ? define(factory) :
|
|
(global.ES6Promise = factory());
|
|
}(this, (function () { 'use strict';
|
|
|
|
function objectOrFunction(x) {
|
|
return typeof x === 'function' || typeof x === 'object' && x !== null;
|
|
}
|
|
|
|
function isFunction(x) {
|
|
return typeof x === 'function';
|
|
}
|
|
|
|
var _isArray = undefined;
|
|
if (!Array.isArray) {
|
|
_isArray = function (x) {
|
|
return Object.prototype.toString.call(x) === '[object Array]';
|
|
};
|
|
} else {
|
|
_isArray = Array.isArray;
|
|
}
|
|
|
|
var isArray = _isArray;
|
|
|
|
var len = 0;
|
|
var vertxNext = undefined;
|
|
var customSchedulerFn = undefined;
|
|
|
|
var asap = function asap(callback, arg) {
|
|
queue[len] = callback;
|
|
queue[len + 1] = arg;
|
|
len += 2;
|
|
if (len === 2) {
|
|
// If len is 2, that means that we need to schedule an async flush.
|
|
// If additional callbacks are queued before the queue is flushed, they
|
|
// will be processed by this flush that we are scheduling.
|
|
if (customSchedulerFn) {
|
|
customSchedulerFn(flush);
|
|
} else {
|
|
scheduleFlush();
|
|
}
|
|
}
|
|
};
|
|
|
|
function setScheduler(scheduleFn) {
|
|
customSchedulerFn = scheduleFn;
|
|
}
|
|
|
|
function setAsap(asapFn) {
|
|
asap = asapFn;
|
|
}
|
|
|
|
var browserWindow = typeof window !== 'undefined' ? window : undefined;
|
|
var browserGlobal = browserWindow || {};
|
|
var BrowserMutationObserver = browserGlobal.MutationObserver || browserGlobal.WebKitMutationObserver;
|
|
var isNode = typeof self === 'undefined' && typeof process !== 'undefined' && ({}).toString.call(process) === '[object process]';
|
|
|
|
// test for web worker but not in IE10
|
|
var isWorker = typeof Uint8ClampedArray !== 'undefined' && typeof importScripts !== 'undefined' && typeof MessageChannel !== 'undefined';
|
|
|
|
// node
|
|
function useNextTick() {
|
|
// node version 0.10.x displays a deprecation warning when nextTick is used recursively
|
|
// see https://github.com/cujojs/when/issues/410 for details
|
|
return function () {
|
|
return process.nextTick(flush);
|
|
};
|
|
}
|
|
|
|
// vertx
|
|
function useVertxTimer() {
|
|
if (typeof vertxNext !== 'undefined') {
|
|
return function () {
|
|
vertxNext(flush);
|
|
};
|
|
}
|
|
|
|
return useSetTimeout();
|
|
}
|
|
|
|
function useMutationObserver() {
|
|
var iterations = 0;
|
|
var observer = new BrowserMutationObserver(flush);
|
|
var node = document.createTextNode('');
|
|
observer.observe(node, { characterData: true });
|
|
|
|
return function () {
|
|
node.data = iterations = ++iterations % 2;
|
|
};
|
|
}
|
|
|
|
// web worker
|
|
function useMessageChannel() {
|
|
var channel = new MessageChannel();
|
|
channel.port1.onmessage = flush;
|
|
return function () {
|
|
return channel.port2.postMessage(0);
|
|
};
|
|
}
|
|
|
|
function useSetTimeout() {
|
|
// Store setTimeout reference so es6-promise will be unaffected by
|
|
// other code modifying setTimeout (like sinon.useFakeTimers())
|
|
var globalSetTimeout = setTimeout;
|
|
return function () {
|
|
return globalSetTimeout(flush, 1);
|
|
};
|
|
}
|
|
|
|
var queue = new Array(1000);
|
|
function flush() {
|
|
for (var i = 0; i < len; i += 2) {
|
|
var callback = queue[i];
|
|
var arg = queue[i + 1];
|
|
|
|
callback(arg);
|
|
|
|
queue[i] = undefined;
|
|
queue[i + 1] = undefined;
|
|
}
|
|
|
|
len = 0;
|
|
}
|
|
|
|
function attemptVertx() {
|
|
try {
|
|
var r = require;
|
|
var vertx = __webpack_require__(11);
|
|
vertxNext = vertx.runOnLoop || vertx.runOnContext;
|
|
return useVertxTimer();
|
|
} catch (e) {
|
|
return useSetTimeout();
|
|
}
|
|
}
|
|
|
|
var scheduleFlush = undefined;
|
|
// Decide what async method to use to triggering processing of queued callbacks:
|
|
if (isNode) {
|
|
scheduleFlush = useNextTick();
|
|
} else if (BrowserMutationObserver) {
|
|
scheduleFlush = useMutationObserver();
|
|
} else if (isWorker) {
|
|
scheduleFlush = useMessageChannel();
|
|
} else if (browserWindow === undefined && "function" === 'function') {
|
|
scheduleFlush = attemptVertx();
|
|
} else {
|
|
scheduleFlush = useSetTimeout();
|
|
}
|
|
|
|
function then(onFulfillment, onRejection) {
|
|
var _arguments = arguments;
|
|
|
|
var parent = this;
|
|
|
|
var child = new this.constructor(noop);
|
|
|
|
if (child[PROMISE_ID] === undefined) {
|
|
makePromise(child);
|
|
}
|
|
|
|
var _state = parent._state;
|
|
|
|
if (_state) {
|
|
(function () {
|
|
var callback = _arguments[_state - 1];
|
|
asap(function () {
|
|
return invokeCallback(_state, child, callback, parent._result);
|
|
});
|
|
})();
|
|
} else {
|
|
subscribe(parent, child, onFulfillment, onRejection);
|
|
}
|
|
|
|
return child;
|
|
}
|
|
|
|
/**
|
|
`Promise.resolve` returns a promise that will become resolved with the
|
|
passed `value`. It is shorthand for the following:
|
|
|
|
```javascript
|
|
let promise = new Promise(function(resolve, reject){
|
|
resolve(1);
|
|
});
|
|
|
|
promise.then(function(value){
|
|
// value === 1
|
|
});
|
|
```
|
|
|
|
Instead of writing the above, your code now simply becomes the following:
|
|
|
|
```javascript
|
|
let promise = Promise.resolve(1);
|
|
|
|
promise.then(function(value){
|
|
// value === 1
|
|
});
|
|
```
|
|
|
|
@method resolve
|
|
@static
|
|
@param {Any} value value that the returned promise will be resolved with
|
|
Useful for tooling.
|
|
@return {Promise} a promise that will become fulfilled with the given
|
|
`value`
|
|
*/
|
|
function resolve(object) {
|
|
/*jshint validthis:true */
|
|
var Constructor = this;
|
|
|
|
if (object && typeof object === 'object' && object.constructor === Constructor) {
|
|
return object;
|
|
}
|
|
|
|
var promise = new Constructor(noop);
|
|
_resolve(promise, object);
|
|
return promise;
|
|
}
|
|
|
|
var PROMISE_ID = Math.random().toString(36).substring(16);
|
|
|
|
function noop() {}
|
|
|
|
var PENDING = void 0;
|
|
var FULFILLED = 1;
|
|
var REJECTED = 2;
|
|
|
|
var GET_THEN_ERROR = new ErrorObject();
|
|
|
|
function selfFulfillment() {
|
|
return new TypeError("You cannot resolve a promise with itself");
|
|
}
|
|
|
|
function cannotReturnOwn() {
|
|
return new TypeError('A promises callback cannot return that same promise.');
|
|
}
|
|
|
|
function getThen(promise) {
|
|
try {
|
|
return promise.then;
|
|
} catch (error) {
|
|
GET_THEN_ERROR.error = error;
|
|
return GET_THEN_ERROR;
|
|
}
|
|
}
|
|
|
|
function tryThen(then, value, fulfillmentHandler, rejectionHandler) {
|
|
try {
|
|
then.call(value, fulfillmentHandler, rejectionHandler);
|
|
} catch (e) {
|
|
return e;
|
|
}
|
|
}
|
|
|
|
function handleForeignThenable(promise, thenable, then) {
|
|
asap(function (promise) {
|
|
var sealed = false;
|
|
var error = tryThen(then, thenable, function (value) {
|
|
if (sealed) {
|
|
return;
|
|
}
|
|
sealed = true;
|
|
if (thenable !== value) {
|
|
_resolve(promise, value);
|
|
} else {
|
|
fulfill(promise, value);
|
|
}
|
|
}, function (reason) {
|
|
if (sealed) {
|
|
return;
|
|
}
|
|
sealed = true;
|
|
|
|
_reject(promise, reason);
|
|
}, 'Settle: ' + (promise._label || ' unknown promise'));
|
|
|
|
if (!sealed && error) {
|
|
sealed = true;
|
|
_reject(promise, error);
|
|
}
|
|
}, promise);
|
|
}
|
|
|
|
function handleOwnThenable(promise, thenable) {
|
|
if (thenable._state === FULFILLED) {
|
|
fulfill(promise, thenable._result);
|
|
} else if (thenable._state === REJECTED) {
|
|
_reject(promise, thenable._result);
|
|
} else {
|
|
subscribe(thenable, undefined, function (value) {
|
|
return _resolve(promise, value);
|
|
}, function (reason) {
|
|
return _reject(promise, reason);
|
|
});
|
|
}
|
|
}
|
|
|
|
function handleMaybeThenable(promise, maybeThenable, then$$) {
|
|
if (maybeThenable.constructor === promise.constructor && then$$ === then && maybeThenable.constructor.resolve === resolve) {
|
|
handleOwnThenable(promise, maybeThenable);
|
|
} else {
|
|
if (then$$ === GET_THEN_ERROR) {
|
|
_reject(promise, GET_THEN_ERROR.error);
|
|
GET_THEN_ERROR.error = null;
|
|
} else if (then$$ === undefined) {
|
|
fulfill(promise, maybeThenable);
|
|
} else if (isFunction(then$$)) {
|
|
handleForeignThenable(promise, maybeThenable, then$$);
|
|
} else {
|
|
fulfill(promise, maybeThenable);
|
|
}
|
|
}
|
|
}
|
|
|
|
function _resolve(promise, value) {
|
|
if (promise === value) {
|
|
_reject(promise, selfFulfillment());
|
|
} else if (objectOrFunction(value)) {
|
|
handleMaybeThenable(promise, value, getThen(value));
|
|
} else {
|
|
fulfill(promise, value);
|
|
}
|
|
}
|
|
|
|
function publishRejection(promise) {
|
|
if (promise._onerror) {
|
|
promise._onerror(promise._result);
|
|
}
|
|
|
|
publish(promise);
|
|
}
|
|
|
|
function fulfill(promise, value) {
|
|
if (promise._state !== PENDING) {
|
|
return;
|
|
}
|
|
|
|
promise._result = value;
|
|
promise._state = FULFILLED;
|
|
|
|
if (promise._subscribers.length !== 0) {
|
|
asap(publish, promise);
|
|
}
|
|
}
|
|
|
|
function _reject(promise, reason) {
|
|
if (promise._state !== PENDING) {
|
|
return;
|
|
}
|
|
promise._state = REJECTED;
|
|
promise._result = reason;
|
|
|
|
asap(publishRejection, promise);
|
|
}
|
|
|
|
function subscribe(parent, child, onFulfillment, onRejection) {
|
|
var _subscribers = parent._subscribers;
|
|
var length = _subscribers.length;
|
|
|
|
parent._onerror = null;
|
|
|
|
_subscribers[length] = child;
|
|
_subscribers[length + FULFILLED] = onFulfillment;
|
|
_subscribers[length + REJECTED] = onRejection;
|
|
|
|
if (length === 0 && parent._state) {
|
|
asap(publish, parent);
|
|
}
|
|
}
|
|
|
|
function publish(promise) {
|
|
var subscribers = promise._subscribers;
|
|
var settled = promise._state;
|
|
|
|
if (subscribers.length === 0) {
|
|
return;
|
|
}
|
|
|
|
var child = undefined,
|
|
callback = undefined,
|
|
detail = promise._result;
|
|
|
|
for (var i = 0; i < subscribers.length; i += 3) {
|
|
child = subscribers[i];
|
|
callback = subscribers[i + settled];
|
|
|
|
if (child) {
|
|
invokeCallback(settled, child, callback, detail);
|
|
} else {
|
|
callback(detail);
|
|
}
|
|
}
|
|
|
|
promise._subscribers.length = 0;
|
|
}
|
|
|
|
function ErrorObject() {
|
|
this.error = null;
|
|
}
|
|
|
|
var TRY_CATCH_ERROR = new ErrorObject();
|
|
|
|
function tryCatch(callback, detail) {
|
|
try {
|
|
return callback(detail);
|
|
} catch (e) {
|
|
TRY_CATCH_ERROR.error = e;
|
|
return TRY_CATCH_ERROR;
|
|
}
|
|
}
|
|
|
|
function invokeCallback(settled, promise, callback, detail) {
|
|
var hasCallback = isFunction(callback),
|
|
value = undefined,
|
|
error = undefined,
|
|
succeeded = undefined,
|
|
failed = undefined;
|
|
|
|
if (hasCallback) {
|
|
value = tryCatch(callback, detail);
|
|
|
|
if (value === TRY_CATCH_ERROR) {
|
|
failed = true;
|
|
error = value.error;
|
|
value.error = null;
|
|
} else {
|
|
succeeded = true;
|
|
}
|
|
|
|
if (promise === value) {
|
|
_reject(promise, cannotReturnOwn());
|
|
return;
|
|
}
|
|
} else {
|
|
value = detail;
|
|
succeeded = true;
|
|
}
|
|
|
|
if (promise._state !== PENDING) {
|
|
// noop
|
|
} else if (hasCallback && succeeded) {
|
|
_resolve(promise, value);
|
|
} else if (failed) {
|
|
_reject(promise, error);
|
|
} else if (settled === FULFILLED) {
|
|
fulfill(promise, value);
|
|
} else if (settled === REJECTED) {
|
|
_reject(promise, value);
|
|
}
|
|
}
|
|
|
|
function initializePromise(promise, resolver) {
|
|
try {
|
|
resolver(function resolvePromise(value) {
|
|
_resolve(promise, value);
|
|
}, function rejectPromise(reason) {
|
|
_reject(promise, reason);
|
|
});
|
|
} catch (e) {
|
|
_reject(promise, e);
|
|
}
|
|
}
|
|
|
|
var id = 0;
|
|
function nextId() {
|
|
return id++;
|
|
}
|
|
|
|
function makePromise(promise) {
|
|
promise[PROMISE_ID] = id++;
|
|
promise._state = undefined;
|
|
promise._result = undefined;
|
|
promise._subscribers = [];
|
|
}
|
|
|
|
function Enumerator(Constructor, input) {
|
|
this._instanceConstructor = Constructor;
|
|
this.promise = new Constructor(noop);
|
|
|
|
if (!this.promise[PROMISE_ID]) {
|
|
makePromise(this.promise);
|
|
}
|
|
|
|
if (isArray(input)) {
|
|
this._input = input;
|
|
this.length = input.length;
|
|
this._remaining = input.length;
|
|
|
|
this._result = new Array(this.length);
|
|
|
|
if (this.length === 0) {
|
|
fulfill(this.promise, this._result);
|
|
} else {
|
|
this.length = this.length || 0;
|
|
this._enumerate();
|
|
if (this._remaining === 0) {
|
|
fulfill(this.promise, this._result);
|
|
}
|
|
}
|
|
} else {
|
|
_reject(this.promise, validationError());
|
|
}
|
|
}
|
|
|
|
function validationError() {
|
|
return new Error('Array Methods must be provided an Array');
|
|
};
|
|
|
|
Enumerator.prototype._enumerate = function () {
|
|
var length = this.length;
|
|
var _input = this._input;
|
|
|
|
for (var i = 0; this._state === PENDING && i < length; i++) {
|
|
this._eachEntry(_input[i], i);
|
|
}
|
|
};
|
|
|
|
Enumerator.prototype._eachEntry = function (entry, i) {
|
|
var c = this._instanceConstructor;
|
|
var resolve$$ = c.resolve;
|
|
|
|
if (resolve$$ === resolve) {
|
|
var _then = getThen(entry);
|
|
|
|
if (_then === then && entry._state !== PENDING) {
|
|
this._settledAt(entry._state, i, entry._result);
|
|
} else if (typeof _then !== 'function') {
|
|
this._remaining--;
|
|
this._result[i] = entry;
|
|
} else if (c === Promise) {
|
|
var promise = new c(noop);
|
|
handleMaybeThenable(promise, entry, _then);
|
|
this._willSettleAt(promise, i);
|
|
} else {
|
|
this._willSettleAt(new c(function (resolve$$) {
|
|
return resolve$$(entry);
|
|
}), i);
|
|
}
|
|
} else {
|
|
this._willSettleAt(resolve$$(entry), i);
|
|
}
|
|
};
|
|
|
|
Enumerator.prototype._settledAt = function (state, i, value) {
|
|
var promise = this.promise;
|
|
|
|
if (promise._state === PENDING) {
|
|
this._remaining--;
|
|
|
|
if (state === REJECTED) {
|
|
_reject(promise, value);
|
|
} else {
|
|
this._result[i] = value;
|
|
}
|
|
}
|
|
|
|
if (this._remaining === 0) {
|
|
fulfill(promise, this._result);
|
|
}
|
|
};
|
|
|
|
Enumerator.prototype._willSettleAt = function (promise, i) {
|
|
var enumerator = this;
|
|
|
|
subscribe(promise, undefined, function (value) {
|
|
return enumerator._settledAt(FULFILLED, i, value);
|
|
}, function (reason) {
|
|
return enumerator._settledAt(REJECTED, i, reason);
|
|
});
|
|
};
|
|
|
|
/**
|
|
`Promise.all` accepts an array of promises, and returns a new promise which
|
|
is fulfilled with an array of fulfillment values for the passed promises, or
|
|
rejected with the reason of the first passed promise to be rejected. It casts all
|
|
elements of the passed iterable to promises as it runs this algorithm.
|
|
|
|
Example:
|
|
|
|
```javascript
|
|
let promise1 = resolve(1);
|
|
let promise2 = resolve(2);
|
|
let promise3 = resolve(3);
|
|
let promises = [ promise1, promise2, promise3 ];
|
|
|
|
Promise.all(promises).then(function(array){
|
|
// The array here would be [ 1, 2, 3 ];
|
|
});
|
|
```
|
|
|
|
If any of the `promises` given to `all` are rejected, the first promise
|
|
that is rejected will be given as an argument to the returned promises's
|
|
rejection handler. For example:
|
|
|
|
Example:
|
|
|
|
```javascript
|
|
let promise1 = resolve(1);
|
|
let promise2 = reject(new Error("2"));
|
|
let promise3 = reject(new Error("3"));
|
|
let promises = [ promise1, promise2, promise3 ];
|
|
|
|
Promise.all(promises).then(function(array){
|
|
// Code here never runs because there are rejected promises!
|
|
}, function(error) {
|
|
// error.message === "2"
|
|
});
|
|
```
|
|
|
|
@method all
|
|
@static
|
|
@param {Array} entries array of promises
|
|
@param {String} label optional string for labeling the promise.
|
|
Useful for tooling.
|
|
@return {Promise} promise that is fulfilled when all `promises` have been
|
|
fulfilled, or rejected if any of them become rejected.
|
|
@static
|
|
*/
|
|
function all(entries) {
|
|
return new Enumerator(this, entries).promise;
|
|
}
|
|
|
|
/**
|
|
`Promise.race` returns a new promise which is settled in the same way as the
|
|
first passed promise to settle.
|
|
|
|
Example:
|
|
|
|
```javascript
|
|
let promise1 = new Promise(function(resolve, reject){
|
|
setTimeout(function(){
|
|
resolve('promise 1');
|
|
}, 200);
|
|
});
|
|
|
|
let promise2 = new Promise(function(resolve, reject){
|
|
setTimeout(function(){
|
|
resolve('promise 2');
|
|
}, 100);
|
|
});
|
|
|
|
Promise.race([promise1, promise2]).then(function(result){
|
|
// result === 'promise 2' because it was resolved before promise1
|
|
// was resolved.
|
|
});
|
|
```
|
|
|
|
`Promise.race` is deterministic in that only the state of the first
|
|
settled promise matters. For example, even if other promises given to the
|
|
`promises` array argument are resolved, but the first settled promise has
|
|
become rejected before the other promises became fulfilled, the returned
|
|
promise will become rejected:
|
|
|
|
```javascript
|
|
let promise1 = new Promise(function(resolve, reject){
|
|
setTimeout(function(){
|
|
resolve('promise 1');
|
|
}, 200);
|
|
});
|
|
|
|
let promise2 = new Promise(function(resolve, reject){
|
|
setTimeout(function(){
|
|
reject(new Error('promise 2'));
|
|
}, 100);
|
|
});
|
|
|
|
Promise.race([promise1, promise2]).then(function(result){
|
|
// Code here never runs
|
|
}, function(reason){
|
|
// reason.message === 'promise 2' because promise 2 became rejected before
|
|
// promise 1 became fulfilled
|
|
});
|
|
```
|
|
|
|
An example real-world use case is implementing timeouts:
|
|
|
|
```javascript
|
|
Promise.race([ajax('foo.json'), timeout(5000)])
|
|
```
|
|
|
|
@method race
|
|
@static
|
|
@param {Array} promises array of promises to observe
|
|
Useful for tooling.
|
|
@return {Promise} a promise which settles in the same way as the first passed
|
|
promise to settle.
|
|
*/
|
|
function race(entries) {
|
|
/*jshint validthis:true */
|
|
var Constructor = this;
|
|
|
|
if (!isArray(entries)) {
|
|
return new Constructor(function (_, reject) {
|
|
return reject(new TypeError('You must pass an array to race.'));
|
|
});
|
|
} else {
|
|
return new Constructor(function (resolve, reject) {
|
|
var length = entries.length;
|
|
for (var i = 0; i < length; i++) {
|
|
Constructor.resolve(entries[i]).then(resolve, reject);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
`Promise.reject` returns a promise rejected with the passed `reason`.
|
|
It is shorthand for the following:
|
|
|
|
```javascript
|
|
let promise = new Promise(function(resolve, reject){
|
|
reject(new Error('WHOOPS'));
|
|
});
|
|
|
|
promise.then(function(value){
|
|
// Code here doesn't run because the promise is rejected!
|
|
}, function(reason){
|
|
// reason.message === 'WHOOPS'
|
|
});
|
|
```
|
|
|
|
Instead of writing the above, your code now simply becomes the following:
|
|
|
|
```javascript
|
|
let promise = Promise.reject(new Error('WHOOPS'));
|
|
|
|
promise.then(function(value){
|
|
// Code here doesn't run because the promise is rejected!
|
|
}, function(reason){
|
|
// reason.message === 'WHOOPS'
|
|
});
|
|
```
|
|
|
|
@method reject
|
|
@static
|
|
@param {Any} reason value that the returned promise will be rejected with.
|
|
Useful for tooling.
|
|
@return {Promise} a promise rejected with the given `reason`.
|
|
*/
|
|
function reject(reason) {
|
|
/*jshint validthis:true */
|
|
var Constructor = this;
|
|
var promise = new Constructor(noop);
|
|
_reject(promise, reason);
|
|
return promise;
|
|
}
|
|
|
|
function needsResolver() {
|
|
throw new TypeError('You must pass a resolver function as the first argument to the promise constructor');
|
|
}
|
|
|
|
function needsNew() {
|
|
throw new TypeError("Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.");
|
|
}
|
|
|
|
/**
|
|
Promise objects represent the eventual result of an asynchronous operation. The
|
|
primary way of interacting with a promise is through its `then` method, which
|
|
registers callbacks to receive either a promise's eventual value or the reason
|
|
why the promise cannot be fulfilled.
|
|
|
|
Terminology
|
|
-----------
|
|
|
|
- `promise` is an object or function with a `then` method whose behavior conforms to this specification.
|
|
- `thenable` is an object or function that defines a `then` method.
|
|
- `value` is any legal JavaScript value (including undefined, a thenable, or a promise).
|
|
- `exception` is a value that is thrown using the throw statement.
|
|
- `reason` is a value that indicates why a promise was rejected.
|
|
- `settled` the final resting state of a promise, fulfilled or rejected.
|
|
|
|
A promise can be in one of three states: pending, fulfilled, or rejected.
|
|
|
|
Promises that are fulfilled have a fulfillment value and are in the fulfilled
|
|
state. Promises that are rejected have a rejection reason and are in the
|
|
rejected state. A fulfillment value is never a thenable.
|
|
|
|
Promises can also be said to *resolve* a value. If this value is also a
|
|
promise, then the original promise's settled state will match the value's
|
|
settled state. So a promise that *resolves* a promise that rejects will
|
|
itself reject, and a promise that *resolves* a promise that fulfills will
|
|
itself fulfill.
|
|
|
|
|
|
Basic Usage:
|
|
------------
|
|
|
|
```js
|
|
let promise = new Promise(function(resolve, reject) {
|
|
// on success
|
|
resolve(value);
|
|
|
|
// on failure
|
|
reject(reason);
|
|
});
|
|
|
|
promise.then(function(value) {
|
|
// on fulfillment
|
|
}, function(reason) {
|
|
// on rejection
|
|
});
|
|
```
|
|
|
|
Advanced Usage:
|
|
---------------
|
|
|
|
Promises shine when abstracting away asynchronous interactions such as
|
|
`XMLHttpRequest`s.
|
|
|
|
```js
|
|
function getJSON(url) {
|
|
return new Promise(function(resolve, reject){
|
|
let xhr = new XMLHttpRequest();
|
|
|
|
xhr.open('GET', url);
|
|
xhr.onreadystatechange = handler;
|
|
xhr.responseType = 'json';
|
|
xhr.setRequestHeader('Accept', 'application/json');
|
|
xhr.send();
|
|
|
|
function handler() {
|
|
if (this.readyState === this.DONE) {
|
|
if (this.status === 200) {
|
|
resolve(this.response);
|
|
} else {
|
|
reject(new Error('getJSON: `' + url + '` failed with status: [' + this.status + ']'));
|
|
}
|
|
}
|
|
};
|
|
});
|
|
}
|
|
|
|
getJSON('/posts.json').then(function(json) {
|
|
// on fulfillment
|
|
}, function(reason) {
|
|
// on rejection
|
|
});
|
|
```
|
|
|
|
Unlike callbacks, promises are great composable primitives.
|
|
|
|
```js
|
|
Promise.all([
|
|
getJSON('/posts'),
|
|
getJSON('/comments')
|
|
]).then(function(values){
|
|
values[0] // => postsJSON
|
|
values[1] // => commentsJSON
|
|
|
|
return values;
|
|
});
|
|
```
|
|
|
|
@class Promise
|
|
@param {function} resolver
|
|
Useful for tooling.
|
|
@constructor
|
|
*/
|
|
function Promise(resolver) {
|
|
this[PROMISE_ID] = nextId();
|
|
this._result = this._state = undefined;
|
|
this._subscribers = [];
|
|
|
|
if (noop !== resolver) {
|
|
typeof resolver !== 'function' && needsResolver();
|
|
this instanceof Promise ? initializePromise(this, resolver) : needsNew();
|
|
}
|
|
}
|
|
|
|
Promise.all = all;
|
|
Promise.race = race;
|
|
Promise.resolve = resolve;
|
|
Promise.reject = reject;
|
|
Promise._setScheduler = setScheduler;
|
|
Promise._setAsap = setAsap;
|
|
Promise._asap = asap;
|
|
|
|
Promise.prototype = {
|
|
constructor: Promise,
|
|
|
|
/**
|
|
The primary way of interacting with a promise is through its `then` method,
|
|
which registers callbacks to receive either a promise's eventual value or the
|
|
reason why the promise cannot be fulfilled.
|
|
|
|
```js
|
|
findUser().then(function(user){
|
|
// user is available
|
|
}, function(reason){
|
|
// user is unavailable, and you are given the reason why
|
|
});
|
|
```
|
|
|
|
Chaining
|
|
--------
|
|
|
|
The return value of `then` is itself a promise. This second, 'downstream'
|
|
promise is resolved with the return value of the first promise's fulfillment
|
|
or rejection handler, or rejected if the handler throws an exception.
|
|
|
|
```js
|
|
findUser().then(function (user) {
|
|
return user.name;
|
|
}, function (reason) {
|
|
return 'default name';
|
|
}).then(function (userName) {
|
|
// If `findUser` fulfilled, `userName` will be the user's name, otherwise it
|
|
// will be `'default name'`
|
|
});
|
|
|
|
findUser().then(function (user) {
|
|
throw new Error('Found user, but still unhappy');
|
|
}, function (reason) {
|
|
throw new Error('`findUser` rejected and we're unhappy');
|
|
}).then(function (value) {
|
|
// never reached
|
|
}, function (reason) {
|
|
// if `findUser` fulfilled, `reason` will be 'Found user, but still unhappy'.
|
|
// If `findUser` rejected, `reason` will be '`findUser` rejected and we're unhappy'.
|
|
});
|
|
```
|
|
If the downstream promise does not specify a rejection handler, rejection reasons will be propagated further downstream.
|
|
|
|
```js
|
|
findUser().then(function (user) {
|
|
throw new PedagogicalException('Upstream error');
|
|
}).then(function (value) {
|
|
// never reached
|
|
}).then(function (value) {
|
|
// never reached
|
|
}, function (reason) {
|
|
// The `PedgagocialException` is propagated all the way down to here
|
|
});
|
|
```
|
|
|
|
Assimilation
|
|
------------
|
|
|
|
Sometimes the value you want to propagate to a downstream promise can only be
|
|
retrieved asynchronously. This can be achieved by returning a promise in the
|
|
fulfillment or rejection handler. The downstream promise will then be pending
|
|
until the returned promise is settled. This is called *assimilation*.
|
|
|
|
```js
|
|
findUser().then(function (user) {
|
|
return findCommentsByAuthor(user);
|
|
}).then(function (comments) {
|
|
// The user's comments are now available
|
|
});
|
|
```
|
|
|
|
If the assimliated promise rejects, then the downstream promise will also reject.
|
|
|
|
```js
|
|
findUser().then(function (user) {
|
|
return findCommentsByAuthor(user);
|
|
}).then(function (comments) {
|
|
// If `findCommentsByAuthor` fulfills, we'll have the value here
|
|
}, function (reason) {
|
|
// If `findCommentsByAuthor` rejects, we'll have the reason here
|
|
});
|
|
```
|
|
|
|
Simple Example
|
|
--------------
|
|
|
|
Synchronous Example
|
|
|
|
```javascript
|
|
let result;
|
|
|
|
try {
|
|
result = findResult();
|
|
// success
|
|
} catch(reason) {
|
|
// failure
|
|
}
|
|
```
|
|
|
|
Errback Example
|
|
|
|
```js
|
|
findResult(function(result, err){
|
|
if (err) {
|
|
// failure
|
|
} else {
|
|
// success
|
|
}
|
|
});
|
|
```
|
|
|
|
Promise Example;
|
|
|
|
```javascript
|
|
findResult().then(function(result){
|
|
// success
|
|
}, function(reason){
|
|
// failure
|
|
});
|
|
```
|
|
|
|
Advanced Example
|
|
--------------
|
|
|
|
Synchronous Example
|
|
|
|
```javascript
|
|
let author, books;
|
|
|
|
try {
|
|
author = findAuthor();
|
|
books = findBooksByAuthor(author);
|
|
// success
|
|
} catch(reason) {
|
|
// failure
|
|
}
|
|
```
|
|
|
|
Errback Example
|
|
|
|
```js
|
|
|
|
function foundBooks(books) {
|
|
|
|
}
|
|
|
|
function failure(reason) {
|
|
|
|
}
|
|
|
|
findAuthor(function(author, err){
|
|
if (err) {
|
|
failure(err);
|
|
// failure
|
|
} else {
|
|
try {
|
|
findBoooksByAuthor(author, function(books, err) {
|
|
if (err) {
|
|
failure(err);
|
|
} else {
|
|
try {
|
|
foundBooks(books);
|
|
} catch(reason) {
|
|
failure(reason);
|
|
}
|
|
}
|
|
});
|
|
} catch(error) {
|
|
failure(err);
|
|
}
|
|
// success
|
|
}
|
|
});
|
|
```
|
|
|
|
Promise Example;
|
|
|
|
```javascript
|
|
findAuthor().
|
|
then(findBooksByAuthor).
|
|
then(function(books){
|
|
// found books
|
|
}).catch(function(reason){
|
|
// something went wrong
|
|
});
|
|
```
|
|
|
|
@method then
|
|
@param {Function} onFulfilled
|
|
@param {Function} onRejected
|
|
Useful for tooling.
|
|
@return {Promise}
|
|
*/
|
|
then: then,
|
|
|
|
/**
|
|
`catch` is simply sugar for `then(undefined, onRejection)` which makes it the same
|
|
as the catch block of a try/catch statement.
|
|
|
|
```js
|
|
function findAuthor(){
|
|
throw new Error('couldn't find that author');
|
|
}
|
|
|
|
// synchronous
|
|
try {
|
|
findAuthor();
|
|
} catch(reason) {
|
|
// something went wrong
|
|
}
|
|
|
|
// async with promises
|
|
findAuthor().catch(function(reason){
|
|
// something went wrong
|
|
});
|
|
```
|
|
|
|
@method catch
|
|
@param {Function} onRejection
|
|
Useful for tooling.
|
|
@return {Promise}
|
|
*/
|
|
'catch': function _catch(onRejection) {
|
|
return this.then(null, onRejection);
|
|
}
|
|
};
|
|
|
|
function polyfill() {
|
|
var local = undefined;
|
|
|
|
if (typeof global !== 'undefined') {
|
|
local = global;
|
|
} else if (typeof self !== 'undefined') {
|
|
local = self;
|
|
} else {
|
|
try {
|
|
local = Function('return this')();
|
|
} catch (e) {
|
|
throw new Error('polyfill failed because global object is unavailable in this environment');
|
|
}
|
|
}
|
|
|
|
var P = local.Promise;
|
|
|
|
if (P) {
|
|
var promiseToString = null;
|
|
try {
|
|
promiseToString = Object.prototype.toString.call(P.resolve());
|
|
} catch (e) {
|
|
// silently ignored
|
|
}
|
|
|
|
if (promiseToString === '[object Promise]' && !P.cast) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
local.Promise = Promise;
|
|
}
|
|
|
|
// Strange compat..
|
|
Promise.polyfill = polyfill;
|
|
Promise.Promise = Promise;
|
|
|
|
return Promise;
|
|
|
|
})));
|
|
|
|
|
|
/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(10), (function() { return this; }())))
|
|
|
|
/***/ }),
|
|
/* 10 */
|
|
/***/ (function(module, exports) {
|
|
|
|
// shim for using process in browser
|
|
var process = module.exports = {};
|
|
|
|
// cached from whatever global is present so that test runners that stub it
|
|
// don't break things. But we need to wrap it in a try catch in case it is
|
|
// wrapped in strict mode code which doesn't define any globals. It's inside a
|
|
// function because try/catches deoptimize in certain engines.
|
|
|
|
var cachedSetTimeout;
|
|
var cachedClearTimeout;
|
|
|
|
function defaultSetTimout() {
|
|
throw new Error('setTimeout has not been defined');
|
|
}
|
|
function defaultClearTimeout () {
|
|
throw new Error('clearTimeout has not been defined');
|
|
}
|
|
(function () {
|
|
try {
|
|
if (typeof setTimeout === 'function') {
|
|
cachedSetTimeout = setTimeout;
|
|
} else {
|
|
cachedSetTimeout = defaultSetTimout;
|
|
}
|
|
} catch (e) {
|
|
cachedSetTimeout = defaultSetTimout;
|
|
}
|
|
try {
|
|
if (typeof clearTimeout === 'function') {
|
|
cachedClearTimeout = clearTimeout;
|
|
} else {
|
|
cachedClearTimeout = defaultClearTimeout;
|
|
}
|
|
} catch (e) {
|
|
cachedClearTimeout = defaultClearTimeout;
|
|
}
|
|
} ())
|
|
function runTimeout(fun) {
|
|
if (cachedSetTimeout === setTimeout) {
|
|
//normal enviroments in sane situations
|
|
return setTimeout(fun, 0);
|
|
}
|
|
// if setTimeout wasn't available but was latter defined
|
|
if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
|
|
cachedSetTimeout = setTimeout;
|
|
return setTimeout(fun, 0);
|
|
}
|
|
try {
|
|
// when when somebody has screwed with setTimeout but no I.E. maddness
|
|
return cachedSetTimeout(fun, 0);
|
|
} catch(e){
|
|
try {
|
|
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
|
|
return cachedSetTimeout.call(null, fun, 0);
|
|
} catch(e){
|
|
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
|
|
return cachedSetTimeout.call(this, fun, 0);
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
function runClearTimeout(marker) {
|
|
if (cachedClearTimeout === clearTimeout) {
|
|
//normal enviroments in sane situations
|
|
return clearTimeout(marker);
|
|
}
|
|
// if clearTimeout wasn't available but was latter defined
|
|
if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
|
|
cachedClearTimeout = clearTimeout;
|
|
return clearTimeout(marker);
|
|
}
|
|
try {
|
|
// when when somebody has screwed with setTimeout but no I.E. maddness
|
|
return cachedClearTimeout(marker);
|
|
} catch (e){
|
|
try {
|
|
// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
|
|
return cachedClearTimeout.call(null, marker);
|
|
} catch (e){
|
|
// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
|
|
// Some versions of I.E. have different rules for clearTimeout vs setTimeout
|
|
return cachedClearTimeout.call(this, marker);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
}
|
|
var queue = [];
|
|
var draining = false;
|
|
var currentQueue;
|
|
var queueIndex = -1;
|
|
|
|
function cleanUpNextTick() {
|
|
if (!draining || !currentQueue) {
|
|
return;
|
|
}
|
|
draining = false;
|
|
if (currentQueue.length) {
|
|
queue = currentQueue.concat(queue);
|
|
} else {
|
|
queueIndex = -1;
|
|
}
|
|
if (queue.length) {
|
|
drainQueue();
|
|
}
|
|
}
|
|
|
|
function drainQueue() {
|
|
if (draining) {
|
|
return;
|
|
}
|
|
var timeout = runTimeout(cleanUpNextTick);
|
|
draining = true;
|
|
|
|
var len = queue.length;
|
|
while(len) {
|
|
currentQueue = queue;
|
|
queue = [];
|
|
while (++queueIndex < len) {
|
|
if (currentQueue) {
|
|
currentQueue[queueIndex].run();
|
|
}
|
|
}
|
|
queueIndex = -1;
|
|
len = queue.length;
|
|
}
|
|
currentQueue = null;
|
|
draining = false;
|
|
runClearTimeout(timeout);
|
|
}
|
|
|
|
process.nextTick = function (fun) {
|
|
var args = new Array(arguments.length - 1);
|
|
if (arguments.length > 1) {
|
|
for (var i = 1; i < arguments.length; i++) {
|
|
args[i - 1] = arguments[i];
|
|
}
|
|
}
|
|
queue.push(new Item(fun, args));
|
|
if (queue.length === 1 && !draining) {
|
|
runTimeout(drainQueue);
|
|
}
|
|
};
|
|
|
|
// v8 likes predictible objects
|
|
function Item(fun, array) {
|
|
this.fun = fun;
|
|
this.array = array;
|
|
}
|
|
Item.prototype.run = function () {
|
|
this.fun.apply(null, this.array);
|
|
};
|
|
process.title = 'browser';
|
|
process.browser = true;
|
|
process.env = {};
|
|
process.argv = [];
|
|
process.version = ''; // empty string to avoid regexp issues
|
|
process.versions = {};
|
|
|
|
function noop() {}
|
|
|
|
process.on = noop;
|
|
process.addListener = noop;
|
|
process.once = noop;
|
|
process.off = noop;
|
|
process.removeListener = noop;
|
|
process.removeAllListeners = noop;
|
|
process.emit = noop;
|
|
|
|
process.binding = function (name) {
|
|
throw new Error('process.binding is not supported');
|
|
};
|
|
|
|
process.cwd = function () { return '/' };
|
|
process.chdir = function (dir) {
|
|
throw new Error('process.chdir is not supported');
|
|
};
|
|
process.umask = function() { return 0; };
|
|
|
|
|
|
/***/ }),
|
|
/* 11 */
|
|
/***/ (function(module, exports) {
|
|
|
|
/* (ignored) */
|
|
|
|
/***/ }),
|
|
/* 12 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
/*
|
|
Copyright (c) 2014-2016 Brion Vibber <brion@pobox.com>
|
|
|
|
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
|
|
MPLIED, 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() {
|
|
"use strict";
|
|
|
|
var FrameSink = __webpack_require__(13),
|
|
SoftwareFrameSink = __webpack_require__(14),
|
|
WebGLFrameSink = __webpack_require__(17);
|
|
|
|
/**
|
|
* @typedef {Object} YUVCanvasOptions
|
|
* @property {boolean} webGL - Whether to use WebGL to draw to the canvas and accelerate color space conversion. If left out, defaults to auto-detect.
|
|
*/
|
|
|
|
var YUVCanvas = {
|
|
FrameSink: FrameSink,
|
|
|
|
SoftwareFrameSink: SoftwareFrameSink,
|
|
|
|
WebGLFrameSink: WebGLFrameSink,
|
|
|
|
/**
|
|
* Attach a suitable FrameSink instance to an HTML5 canvas element.
|
|
*
|
|
* This will take over the drawing context of the canvas and may turn
|
|
* it into a WebGL 3d canvas if possible. Do not attempt to use the
|
|
* drawing context directly after this.
|
|
*
|
|
* @param {HTMLCanvasElement} canvas - HTML canvas element to attach to
|
|
* @param {YUVCanvasOptions} options - map of options
|
|
* @returns {FrameSink} - instance of suitable subclass.
|
|
*/
|
|
attach: function(canvas, options) {
|
|
options = options || {};
|
|
var webGL = ('webGL' in options) ? options.webGL : WebGLFrameSink.isAvailable();
|
|
if (webGL) {
|
|
return new WebGLFrameSink(canvas, options);
|
|
} else {
|
|
return new SoftwareFrameSink(canvas, options);
|
|
}
|
|
}
|
|
};
|
|
|
|
module.exports = YUVCanvas;
|
|
})();
|
|
|
|
|
|
/***/ }),
|
|
/* 13 */
|
|
/***/ (function(module, exports) {
|
|
|
|
(function() {
|
|
"use strict";
|
|
|
|
/**
|
|
* Create a YUVCanvas and attach it to an HTML5 canvas element.
|
|
*
|
|
* This will take over the drawing context of the canvas and may turn
|
|
* it into a WebGL 3d canvas if possible. Do not attempt to use the
|
|
* drawing context directly after this.
|
|
*
|
|
* @param {HTMLCanvasElement} canvas - HTML canvas element to attach to
|
|
* @param {YUVCanvasOptions} options - map of options
|
|
* @throws exception if WebGL requested but unavailable
|
|
* @constructor
|
|
* @abstract
|
|
*/
|
|
function FrameSink(canvas, options) {
|
|
throw new Error('abstract');
|
|
}
|
|
|
|
/**
|
|
* Draw a single YUV frame on the underlying canvas, converting to RGB.
|
|
* If necessary the canvas will be resized to the optimal pixel size
|
|
* for the given buffer's format.
|
|
*
|
|
* @param {YUVBuffer} buffer - the YUV buffer to draw
|
|
* @see {@link https://www.npmjs.com/package/yuv-buffer|yuv-buffer} for format
|
|
*/
|
|
FrameSink.prototype.drawFrame = function(buffer) {
|
|
throw new Error('abstract');
|
|
};
|
|
|
|
/**
|
|
* Clear the canvas using appropriate underlying 2d or 3d context.
|
|
*/
|
|
FrameSink.prototype.clear = function() {
|
|
throw new Error('abstract');
|
|
};
|
|
|
|
module.exports = FrameSink;
|
|
|
|
})();
|
|
|
|
|
|
/***/ }),
|
|
/* 14 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
/*
|
|
Copyright (c) 2014-2016 Brion Vibber <brion@pobox.com>
|
|
|
|
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
|
|
MPLIED, 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() {
|
|
"use strict";
|
|
|
|
var FrameSink = __webpack_require__(13),
|
|
YCbCr = __webpack_require__(15);
|
|
|
|
/**
|
|
* @param {HTMLCanvasElement} canvas - HTML canvas eledment to attach to
|
|
* @constructor
|
|
*/
|
|
function SoftwareFrameSink(canvas) {
|
|
var self = this,
|
|
ctx = canvas.getContext('2d'),
|
|
imageData = null,
|
|
resampleCanvas = null,
|
|
resampleContext = null;
|
|
|
|
|
|
|
|
function initImageData(width, height) {
|
|
imageData = ctx.createImageData(width, height);
|
|
|
|
// Prefill the alpha to opaque
|
|
var data = imageData.data,
|
|
pixelCount = width * height * 4;
|
|
for (var i = 0; i < pixelCount; i += 4) {
|
|
data[i + 3] = 255;
|
|
}
|
|
}
|
|
|
|
function initResampleCanvas(cropWidth, cropHeight) {
|
|
resampleCanvas = document.createElement('canvas');
|
|
resampleCanvas.width = cropWidth;
|
|
resampleCanvas.height = cropHeight;
|
|
resampleContext = resampleCanvas.getContext('2d');
|
|
}
|
|
|
|
/**
|
|
* Actually draw a frame into the canvas.
|
|
* @param {YUVFrame} buffer - YUV frame buffer object to draw
|
|
*/
|
|
self.drawFrame = function drawFrame(buffer) {
|
|
var format = buffer.format;
|
|
|
|
if (canvas.width !== format.displayWidth || canvas.height !== format.displayHeight) {
|
|
// Keep the canvas at the right size...
|
|
canvas.width = format.displayWidth;
|
|
canvas.height = format.displayHeight;
|
|
}
|
|
|
|
if (imageData === null ||
|
|
imageData.width != format.width ||
|
|
imageData.height != format.height) {
|
|
initImageData(format.width, format.height);
|
|
}
|
|
|
|
// YUV -> RGB over the entire encoded frame
|
|
YCbCr.convertYCbCr(buffer, imageData.data);
|
|
|
|
var resample = (format.cropWidth != format.displayWidth || format.cropHeight != format.displayHeight);
|
|
var drawContext;
|
|
if (resample) {
|
|
// hack for non-square aspect-ratio
|
|
// putImageData doesn't resample, so we have to draw in two steps.
|
|
if (!resampleCanvas) {
|
|
initResampleCanvas(format.cropWidth, format.cropHeight);
|
|
}
|
|
drawContext = resampleContext;
|
|
} else {
|
|
drawContext = ctx;
|
|
}
|
|
|
|
// Draw cropped frame to either the final or temporary canvas
|
|
drawContext.putImageData(imageData,
|
|
0, 0,
|
|
format.cropLeft, format.cropTop,
|
|
format.cropWidth, format.cropHeight);
|
|
|
|
if (resample) {
|
|
ctx.drawImage(resampleCanvas, 0, 0, format.displayWidth, format.displayHeight);
|
|
}
|
|
};
|
|
|
|
self.clear = function() {
|
|
ctx.clearRect(0, 0, canvas.width, canvas.height);
|
|
};
|
|
|
|
return self;
|
|
}
|
|
|
|
SoftwareFrameSink.prototype = Object.create(FrameSink.prototype);
|
|
|
|
module.exports = SoftwareFrameSink;
|
|
})();
|
|
|
|
|
|
/***/ }),
|
|
/* 15 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
/*
|
|
Copyright (c) 2014-2016 Brion Vibber <brion@pobox.com>
|
|
|
|
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
|
|
MPLIED, 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() {
|
|
"use strict";
|
|
|
|
var depower = __webpack_require__(16);
|
|
|
|
/**
|
|
* Basic YCbCr->RGB conversion
|
|
*
|
|
* @author Brion Vibber <brion@pobox.com>
|
|
* @copyright 2014-2016
|
|
* @license MIT-style
|
|
*
|
|
* @param {YUVFrame} buffer - input frame buffer
|
|
* @param {Uint8ClampedArray} output - array to draw RGBA into
|
|
* Assumes that the output array already has alpha channel set to opaque.
|
|
*/
|
|
function convertYCbCr(buffer, output) {
|
|
var width = buffer.format.width,
|
|
height = buffer.format.height,
|
|
hdec = depower(buffer.format.width / buffer.format.chromaWidth),
|
|
vdec = depower(buffer.format.height / buffer.format.chromaHeight),
|
|
bytesY = buffer.y.bytes,
|
|
bytesCb = buffer.u.bytes,
|
|
bytesCr = buffer.v.bytes,
|
|
strideY = buffer.y.stride,
|
|
strideCb = buffer.u.stride,
|
|
strideCr = buffer.v.stride,
|
|
outStride = 4 * width,
|
|
YPtr = 0, Y0Ptr = 0, Y1Ptr = 0,
|
|
CbPtr = 0, CrPtr = 0,
|
|
outPtr = 0, outPtr0 = 0, outPtr1 = 0,
|
|
colorCb = 0, colorCr = 0,
|
|
multY = 0, multCrR = 0, multCbCrG = 0, multCbB = 0,
|
|
x = 0, y = 0, xdec = 0, ydec = 0;
|
|
|
|
if (hdec == 1 && vdec == 1) {
|
|
// Optimize for 4:2:0, which is most common
|
|
outPtr0 = 0;
|
|
outPtr1 = outStride;
|
|
ydec = 0;
|
|
for (y = 0; y < height; y += 2) {
|
|
Y0Ptr = y * strideY;
|
|
Y1Ptr = Y0Ptr + strideY;
|
|
CbPtr = ydec * strideCb;
|
|
CrPtr = ydec * strideCr;
|
|
for (x = 0; x < width; x += 2) {
|
|
colorCb = bytesCb[CbPtr++];
|
|
colorCr = bytesCr[CrPtr++];
|
|
|
|
// Quickie YUV conversion
|
|
// https://en.wikipedia.org/wiki/YCbCr#ITU-R_BT.2020_conversion
|
|
// multiplied by 256 for integer-friendliness
|
|
multCrR = (409 * colorCr) - 57088;
|
|
multCbCrG = (100 * colorCb) + (208 * colorCr) - 34816;
|
|
multCbB = (516 * colorCb) - 70912;
|
|
|
|
multY = (298 * bytesY[Y0Ptr++]);
|
|
output[outPtr0++] = (multY + multCrR) >> 8;
|
|
output[outPtr0++] = (multY - multCbCrG) >> 8;
|
|
output[outPtr0++] = (multY + multCbB) >> 8;
|
|
outPtr0++;
|
|
|
|
multY = (298 * bytesY[Y0Ptr++]);
|
|
output[outPtr0++] = (multY + multCrR) >> 8;
|
|
output[outPtr0++] = (multY - multCbCrG) >> 8;
|
|
output[outPtr0++] = (multY + multCbB) >> 8;
|
|
outPtr0++;
|
|
|
|
multY = (298 * bytesY[Y1Ptr++]);
|
|
output[outPtr1++] = (multY + multCrR) >> 8;
|
|
output[outPtr1++] = (multY - multCbCrG) >> 8;
|
|
output[outPtr1++] = (multY + multCbB) >> 8;
|
|
outPtr1++;
|
|
|
|
multY = (298 * bytesY[Y1Ptr++]);
|
|
output[outPtr1++] = (multY + multCrR) >> 8;
|
|
output[outPtr1++] = (multY - multCbCrG) >> 8;
|
|
output[outPtr1++] = (multY + multCbB) >> 8;
|
|
outPtr1++;
|
|
}
|
|
outPtr0 += outStride;
|
|
outPtr1 += outStride;
|
|
ydec++;
|
|
}
|
|
} else {
|
|
outPtr = 0;
|
|
for (y = 0; y < height; y++) {
|
|
xdec = 0;
|
|
ydec = y >> vdec;
|
|
YPtr = y * strideY;
|
|
CbPtr = ydec * strideCb;
|
|
CrPtr = ydec * strideCr;
|
|
|
|
for (x = 0; x < width; x++) {
|
|
xdec = x >> hdec;
|
|
colorCb = bytesCb[CbPtr + xdec];
|
|
colorCr = bytesCr[CrPtr + xdec];
|
|
|
|
// Quickie YUV conversion
|
|
// https://en.wikipedia.org/wiki/YCbCr#ITU-R_BT.2020_conversion
|
|
// multiplied by 256 for integer-friendliness
|
|
multCrR = (409 * colorCr) - 57088;
|
|
multCbCrG = (100 * colorCb) + (208 * colorCr) - 34816;
|
|
multCbB = (516 * colorCb) - 70912;
|
|
|
|
multY = 298 * bytesY[YPtr++];
|
|
output[outPtr++] = (multY + multCrR) >> 8;
|
|
output[outPtr++] = (multY - multCbCrG) >> 8;
|
|
output[outPtr++] = (multY + multCbB) >> 8;
|
|
outPtr++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
module.exports = {
|
|
convertYCbCr: convertYCbCr
|
|
};
|
|
})();
|
|
|
|
|
|
/***/ }),
|
|
/* 16 */
|
|
/***/ (function(module, exports) {
|
|
|
|
/*
|
|
Copyright (c) 2014-2016 Brion Vibber <brion@pobox.com>
|
|
|
|
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
|
|
MPLIED, 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() {
|
|
"use strict";
|
|
|
|
/**
|
|
* Convert a ratio into a bit-shift count; for instance a ratio of 2
|
|
* becomes a bit-shift of 1, while a ratio of 1 is a bit-shift of 0.
|
|
*
|
|
* @author Brion Vibber <brion@pobox.com>
|
|
* @copyright 2016
|
|
* @license MIT-style
|
|
*
|
|
* @param {number} ratio - the integer ratio to convert.
|
|
* @returns {number} - number of bits to shift to multiply/divide by the ratio.
|
|
* @throws exception if given a non-power-of-two
|
|
*/
|
|
function depower(ratio) {
|
|
var shiftCount = 0,
|
|
n = ratio >> 1;
|
|
while (n != 0) {
|
|
n = n >> 1;
|
|
shiftCount++
|
|
}
|
|
if (ratio !== (1 << shiftCount)) {
|
|
throw 'chroma plane dimensions must be power of 2 ratio to luma plane dimensions; got ' + ratio;
|
|
}
|
|
return shiftCount;
|
|
}
|
|
|
|
module.exports = depower;
|
|
})();
|
|
|
|
|
|
/***/ }),
|
|
/* 17 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
/*
|
|
Copyright (c) 2014-2016 Brion Vibber <brion@pobox.com>
|
|
|
|
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
|
|
MPLIED, 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() {
|
|
"use strict";
|
|
|
|
var FrameSink = __webpack_require__(13),
|
|
shaders = __webpack_require__(18);
|
|
|
|
/**
|
|
* Warning: canvas must not have been used for 2d drawing prior!
|
|
*
|
|
* @param {HTMLCanvasElement} canvas - HTML canvas element to attach to
|
|
* @constructor
|
|
*/
|
|
function WebGLFrameSink(canvas) {
|
|
var self = this,
|
|
gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl'),
|
|
debug = false; // swap this to enable more error checks, which can slow down rendering
|
|
|
|
if (gl === null) {
|
|
throw new Error('WebGL unavailable');
|
|
}
|
|
|
|
// GL!
|
|
function checkError() {
|
|
if (debug) {
|
|
err = gl.getError();
|
|
if (err !== 0) {
|
|
throw new Error("GL error " + err);
|
|
}
|
|
}
|
|
}
|
|
|
|
function compileShader(type, source) {
|
|
var shader = gl.createShader(type);
|
|
gl.shaderSource(shader, source);
|
|
gl.compileShader(shader);
|
|
|
|
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
|
|
var err = gl.getShaderInfoLog(shader);
|
|
gl.deleteShader(shader);
|
|
throw new Error('GL shader compilation for ' + type + ' failed: ' + err);
|
|
}
|
|
|
|
return shader;
|
|
}
|
|
|
|
|
|
var vertexShader,
|
|
fragmentShader,
|
|
program,
|
|
buf,
|
|
err;
|
|
|
|
// In the world of GL there are no rectangles.
|
|
// There are only triangles.
|
|
// THERE IS NO SPOON.
|
|
var rectangle = new Float32Array([
|
|
// First triangle (top left, clockwise)
|
|
-1.0, -1.0,
|
|
+1.0, -1.0,
|
|
-1.0, +1.0,
|
|
|
|
// Second triangle (bottom right, clockwise)
|
|
-1.0, +1.0,
|
|
+1.0, -1.0,
|
|
+1.0, +1.0
|
|
]);
|
|
|
|
var textures = {};
|
|
function attachTexture(name, register, index, width, height, data) {
|
|
var texture,
|
|
texWidth = WebGLFrameSink.stripe ? (width / 4) : width,
|
|
format = WebGLFrameSink.stripe ? gl.RGBA : gl.LUMINANCE,
|
|
filter = WebGLFrameSink.stripe ? gl.NEAREST : gl.LINEAR;
|
|
|
|
if (textures[name]) {
|
|
// Reuse & update the existing texture
|
|
texture = textures[name];
|
|
} else {
|
|
textures[name] = texture = gl.createTexture();
|
|
checkError();
|
|
|
|
gl.uniform1i(gl.getUniformLocation(program, name), index);
|
|
checkError();
|
|
}
|
|
gl.activeTexture(register);
|
|
checkError();
|
|
gl.bindTexture(gl.TEXTURE_2D, texture);
|
|
checkError();
|
|
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
|
|
checkError();
|
|
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
|
|
checkError();
|
|
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, filter);
|
|
checkError();
|
|
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, filter);
|
|
checkError();
|
|
|
|
gl.texImage2D(
|
|
gl.TEXTURE_2D,
|
|
0, // mip level
|
|
format, // internal format
|
|
texWidth,
|
|
height,
|
|
0, // border
|
|
format, // format
|
|
gl.UNSIGNED_BYTE, //type
|
|
data // data!
|
|
);
|
|
checkError();
|
|
|
|
return texture;
|
|
}
|
|
|
|
function buildStripe(width, height) {
|
|
var len = width * height,
|
|
out = new Uint32Array(len);
|
|
for (var i = 0; i < len; i += 4) {
|
|
out[i ] = 0x000000ff;
|
|
out[i + 1] = 0x0000ff00;
|
|
out[i + 2] = 0x00ff0000;
|
|
out[i + 3] = 0xff000000;
|
|
}
|
|
return new Uint8Array(out.buffer);
|
|
}
|
|
|
|
function init(buffer) {
|
|
vertexShader = compileShader(gl.VERTEX_SHADER, shaders.vertex);
|
|
if (WebGLFrameSink.stripe) {
|
|
fragmentShader = compileShader(gl.FRAGMENT_SHADER, shaders.fragmentStripe);
|
|
} else {
|
|
fragmentShader = compileShader(gl.FRAGMENT_SHADER, shaders.fragment);
|
|
}
|
|
|
|
program = gl.createProgram();
|
|
gl.attachShader(program, vertexShader);
|
|
checkError();
|
|
|
|
gl.attachShader(program, fragmentShader);
|
|
checkError();
|
|
|
|
gl.linkProgram(program);
|
|
if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
|
|
var err = gl.getProgramInfoLog(program);
|
|
gl.deleteProgram(program);
|
|
throw new Error('GL program linking failed: ' + err);
|
|
}
|
|
|
|
gl.useProgram(program);
|
|
checkError();
|
|
|
|
if (WebGLFrameSink.stripe) {
|
|
attachTexture(
|
|
'uStripeLuma',
|
|
gl.TEXTURE3,
|
|
3,
|
|
buffer.y.stride * 4,
|
|
buffer.format.height,
|
|
buildStripe(buffer.y.stride, buffer.format.height)
|
|
);
|
|
checkError();
|
|
|
|
attachTexture(
|
|
'uStripeChroma',
|
|
gl.TEXTURE4,
|
|
4,
|
|
buffer.u.stride * 4,
|
|
buffer.format.chromaHeight,
|
|
buildStripe(buffer.u.stride, buffer.format.chromaHeight)
|
|
);
|
|
checkError();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Actually draw a frame.
|
|
* @param {YUVFrame} buffer - YUV frame buffer object
|
|
*/
|
|
self.drawFrame = function(buffer) {
|
|
var format = buffer.format;
|
|
|
|
if (canvas.width !== format.displayWidth || canvas.height !== format.displayHeight) {
|
|
// Keep the canvas at the right size...
|
|
canvas.width = format.displayWidth;
|
|
canvas.height = format.displayHeight;
|
|
self.clear();
|
|
}
|
|
|
|
if (!program) {
|
|
init(buffer);
|
|
}
|
|
|
|
// Set up the rectangle and draw it
|
|
|
|
//
|
|
// Set up geometry
|
|
//
|
|
|
|
buf = gl.createBuffer();
|
|
checkError();
|
|
|
|
gl.bindBuffer(gl.ARRAY_BUFFER, buf);
|
|
checkError();
|
|
|
|
gl.bufferData(gl.ARRAY_BUFFER, rectangle, gl.STATIC_DRAW);
|
|
checkError();
|
|
|
|
var positionLocation = gl.getAttribLocation(program, 'aPosition');
|
|
checkError();
|
|
|
|
gl.enableVertexAttribArray(positionLocation);
|
|
checkError();
|
|
|
|
gl.vertexAttribPointer(positionLocation, 2, gl.FLOAT, false, 0, 0);
|
|
checkError();
|
|
|
|
|
|
// Set up the texture geometry...
|
|
function setupTexturePosition(varname, texWidth) {
|
|
// Warning: assumes that the stride for Cb and Cr is the same size in output pixels
|
|
var textureX0 = format.cropLeft / texWidth;
|
|
var textureX1 = (format.cropLeft + format.cropWidth) / texWidth;
|
|
var textureY0 = (format.cropTop + format.cropHeight) / format.height;
|
|
var textureY1 = format.cropTop / format.height;
|
|
var textureRectangle = new Float32Array([
|
|
textureX0, textureY0,
|
|
textureX1, textureY0,
|
|
textureX0, textureY1,
|
|
textureX0, textureY1,
|
|
textureX1, textureY0,
|
|
textureX1, textureY1
|
|
]);
|
|
|
|
var texturePositionBuffer = gl.createBuffer();
|
|
gl.bindBuffer(gl.ARRAY_BUFFER, texturePositionBuffer);
|
|
checkError();
|
|
|
|
gl.bufferData(gl.ARRAY_BUFFER, textureRectangle, gl.STATIC_DRAW);
|
|
checkError();
|
|
|
|
var texturePositionLocation = gl.getAttribLocation(program, varname);
|
|
checkError();
|
|
|
|
gl.enableVertexAttribArray(texturePositionLocation);
|
|
checkError();
|
|
|
|
gl.vertexAttribPointer(texturePositionLocation, 2, gl.FLOAT, false, 0, 0);
|
|
checkError();
|
|
}
|
|
setupTexturePosition('aLumaPosition', buffer.y.stride);
|
|
setupTexturePosition('aChromaPosition', buffer.u.stride * format.width / format.chromaWidth);
|
|
|
|
// Create the textures...
|
|
var textureY = attachTexture(
|
|
'uTextureY',
|
|
gl.TEXTURE0,
|
|
0,
|
|
buffer.y.stride,
|
|
format.height,
|
|
buffer.y.bytes
|
|
);
|
|
var textureCb = attachTexture(
|
|
'uTextureCb',
|
|
gl.TEXTURE1,
|
|
1,
|
|
buffer.u.stride,
|
|
format.chromaHeight,
|
|
buffer.u.bytes
|
|
);
|
|
var textureCr = attachTexture(
|
|
'uTextureCr',
|
|
gl.TEXTURE2,
|
|
2,
|
|
buffer.v.stride,
|
|
format.chromaHeight,
|
|
buffer.v.bytes
|
|
);
|
|
|
|
// Aaaaand draw stuff.
|
|
gl.drawArrays(gl.TRIANGLES, 0, rectangle.length / 2);
|
|
checkError();
|
|
};
|
|
|
|
self.clear = function() {
|
|
gl.viewport(0, 0, canvas.width, canvas.height);
|
|
gl.clearColor(0.0, 0.0, 0.0, 0.0);
|
|
gl.clear(gl.COLOR_BUFFER_BIT);
|
|
};
|
|
|
|
self.clear();
|
|
|
|
return self;
|
|
}
|
|
|
|
// For Windows; luminance and alpha textures are ssllooww to upload,
|
|
// so we pack into RGBA and unpack in the shaders.
|
|
//
|
|
// This seems to affect all browsers on Windows, probably due to fun
|
|
// mismatches between GL and D3D.
|
|
WebGLFrameSink.stripe = (function() {
|
|
if (navigator.userAgent.indexOf('Windows') !== -1) {
|
|
return true;
|
|
}
|
|
return false;
|
|
})();
|
|
|
|
/**
|
|
* Static function to check if WebGL will be available with appropriate features.
|
|
*
|
|
* @returns {boolean} - true if available
|
|
*/
|
|
WebGLFrameSink.isAvailable = function() {
|
|
var canvas = document.createElement('canvas'),
|
|
gl;
|
|
canvas.width = 1;
|
|
canvas.height = 1;
|
|
var options = {
|
|
// Still dithering on whether to use this.
|
|
// Recommend avoiding it, as it's overly conservative
|
|
//failIfMajorPerformanceCaveat: true
|
|
};
|
|
try {
|
|
gl = canvas.getContext('webgl', options) || canvas.getContext('experimental-webgl', options);
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
if (gl) {
|
|
var register = gl.TEXTURE0,
|
|
width = 4,
|
|
height = 4,
|
|
texture = gl.createTexture(),
|
|
data = new Uint8Array(width * height),
|
|
texWidth = WebGLFrameSink.stripe ? (width / 4) : width,
|
|
format = WebGLFrameSink.stripe ? gl.RGBA : gl.LUMINANCE,
|
|
filter = WebGLFrameSink.stripe ? gl.NEAREST : gl.LINEAR;
|
|
|
|
gl.activeTexture(register);
|
|
gl.bindTexture(gl.TEXTURE_2D, texture);
|
|
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, filter);
|
|
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, filter);
|
|
gl.texImage2D(
|
|
gl.TEXTURE_2D,
|
|
0, // mip level
|
|
format, // internal format
|
|
texWidth,
|
|
height,
|
|
0, // border
|
|
format, // format
|
|
gl.UNSIGNED_BYTE, //type
|
|
data // data!
|
|
);
|
|
|
|
var err = gl.getError();
|
|
if (err) {
|
|
// Doesn't support luminance textures?
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
};
|
|
|
|
WebGLFrameSink.prototype = Object.create(FrameSink.prototype);
|
|
|
|
module.exports = WebGLFrameSink;
|
|
})();
|
|
|
|
|
|
/***/ }),
|
|
/* 18 */
|
|
/***/ (function(module, exports) {
|
|
|
|
module.exports = {
|
|
vertex: "attribute vec2 aPosition;\nattribute vec2 aLumaPosition;\nattribute vec2 aChromaPosition;\nvarying vec2 vLumaPosition;\nvarying vec2 vChromaPosition;\nvoid main() {\n gl_Position = vec4(aPosition, 0, 1);\n vLumaPosition = aLumaPosition;\n vChromaPosition = aChromaPosition;\n}\n",
|
|
fragment: "// inspired by https://github.com/mbebenita/Broadway/blob/master/Player/canvas.js\n\nprecision mediump float;\nuniform sampler2D uTextureY;\nuniform sampler2D uTextureCb;\nuniform sampler2D uTextureCr;\nvarying vec2 vLumaPosition;\nvarying vec2 vChromaPosition;\nvoid main() {\n // Y, Cb, and Cr planes are uploaded as LUMINANCE textures.\n float fY = texture2D(uTextureY, vLumaPosition).x;\n float fCb = texture2D(uTextureCb, vChromaPosition).x;\n float fCr = texture2D(uTextureCr, vChromaPosition).x;\n\n // Premultipy the Y...\n float fYmul = fY * 1.1643828125;\n\n // And convert that to RGB!\n gl_FragColor = vec4(\n fYmul + 1.59602734375 * fCr - 0.87078515625,\n fYmul - 0.39176171875 * fCb - 0.81296875 * fCr + 0.52959375,\n fYmul + 2.017234375 * fCb - 1.081390625,\n 1\n );\n}\n",
|
|
fragmentStripe: "// inspired by https://github.com/mbebenita/Broadway/blob/master/Player/canvas.js\n// extra 'stripe' texture fiddling to work around IE 11's poor performance on gl.LUMINANCE and gl.ALPHA textures\n\nprecision mediump float;\nuniform sampler2D uStripeLuma;\nuniform sampler2D uStripeChroma;\nuniform sampler2D uTextureY;\nuniform sampler2D uTextureCb;\nuniform sampler2D uTextureCr;\nvarying vec2 vLumaPosition;\nvarying vec2 vChromaPosition;\nvoid main() {\n // Y, Cb, and Cr planes are mapped into a pseudo-RGBA texture\n // so we can upload them without expanding the bytes on IE 11\n // which doesn\\'t allow LUMINANCE or ALPHA textures.\n // The stripe textures mark which channel to keep for each pixel.\n vec4 vStripeLuma = texture2D(uStripeLuma, vLumaPosition);\n vec4 vStripeChroma = texture2D(uStripeChroma, vChromaPosition);\n\n // Each texture extraction will contain the relevant value in one\n // channel only.\n vec4 vY = texture2D(uTextureY, vLumaPosition) * vStripeLuma;\n vec4 vCb = texture2D(uTextureCb, vChromaPosition) * vStripeChroma;\n vec4 vCr = texture2D(uTextureCr, vChromaPosition) * vStripeChroma;\n\n // Now assemble that into a YUV vector, and premultipy the Y...\n vec3 YUV = vec3(\n (vY.x + vY.y + vY.z + vY.w) * 1.1643828125,\n (vCb.x + vCb.y + vCb.z + vCb.w),\n (vCr.x + vCr.y + vCr.z + vCr.w)\n );\n // And convert that to RGB!\n gl_FragColor = vec4(\n YUV.x + 1.59602734375 * YUV.z - 0.87078515625,\n YUV.x - 0.39176171875 * YUV.y - 0.81296875 * YUV.z + 0.52959375,\n YUV.x + 2.017234375 * YUV.y - 1.081390625,\n 1\n );\n}\n"
|
|
};
|
|
|
|
|
|
/***/ }),
|
|
/* 19 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
|
|
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
|
|
|
|
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
|
|
|
|
var EventEmitter = __webpack_require__(20);
|
|
var CachePool = __webpack_require__(21);
|
|
var Backend = __webpack_require__(24);
|
|
|
|
/**
|
|
* @typedef {Object} StreamFileOptions
|
|
* @property {string} url - the URL to fetch
|
|
* @property {number} chunkSize - max size of each chunked HTTP request / readahead target
|
|
* @property {number} cacheSize - max amount of data to keep buffered in memory for seeks
|
|
*/
|
|
|
|
/**
|
|
* Utility class for chunked streaming of large files via XMLHttpRequest.
|
|
* Provides an abstraction of a seekable input stream, backed by in-memory
|
|
* caching, and some convenient promise-based i/o methods.
|
|
* @param {StreamFileOptions} options
|
|
* @constructor
|
|
*/
|
|
|
|
var StreamFile = function () {
|
|
function StreamFile(_ref) {
|
|
var _ref$url = _ref.url;
|
|
var url = _ref$url === undefined ? '' : _ref$url;
|
|
var _ref$chunkSize = _ref.chunkSize;
|
|
var chunkSize = _ref$chunkSize === undefined ? 1 * 1024 * 1024 : _ref$chunkSize;
|
|
var _ref$cacheSize = _ref.cacheSize;
|
|
var cacheSize = _ref$cacheSize === undefined ? 0 : _ref$cacheSize;
|
|
|
|
_classCallCheck(this, StreamFile);
|
|
|
|
// InputStream public API
|
|
this.length = -1;
|
|
this.loaded = false;
|
|
this.loading = false;
|
|
this.seekable = false;
|
|
this.buffering = false;
|
|
this.seeking = false;
|
|
|
|
Object.defineProperties(this, {
|
|
/**
|
|
* Byte offset of the read head
|
|
*/
|
|
offset: {
|
|
get: function get() {
|
|
return this._cache.readOffset;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Is the read head at the end of the file?
|
|
*/
|
|
eof: {
|
|
get: function get() {
|
|
return this.length === this._cache.readOffset;
|
|
}
|
|
}
|
|
});
|
|
|
|
// StreamFile public API
|
|
this.url = url;
|
|
this.headers = {};
|
|
|
|
// Private
|
|
this._cache = new CachePool({
|
|
cacheSize: cacheSize
|
|
});
|
|
|
|
this._backend = null;
|
|
this._cachever = 0;
|
|
this._chunkSize = chunkSize;
|
|
}
|
|
|
|
/**
|
|
* Open the file, get metadata, and start buffering some data.
|
|
* On success, loaded will become true, headers may be filled out,
|
|
* and length may be available.
|
|
*
|
|
* @returns {Promise}
|
|
*/
|
|
|
|
|
|
_createClass(StreamFile, [{
|
|
key: 'load',
|
|
value: function load() {
|
|
var _this = this;
|
|
|
|
return new Promise(function (resolve, reject) {
|
|
if (_this.loading) {
|
|
throw new Error('cannot load when loading');
|
|
}
|
|
if (_this.loaded) {
|
|
throw new Error('cannot load when loaded');
|
|
}
|
|
_this.loading = true;
|
|
_this._openBackend().then(function (backend) {
|
|
// Save metadata from the first set...
|
|
// Beware this._backend may be null already,
|
|
// if the first segment was very short!
|
|
_this.seekable = backend.seekable;
|
|
_this.headers = backend.headers;
|
|
_this.length = backend.length;
|
|
_this.loaded = true;
|
|
_this.loading = false;
|
|
resolve();
|
|
}).catch(function (err) {
|
|
if (err.name !== 'AbortError') {
|
|
_this.loading = false;
|
|
}
|
|
reject(err);
|
|
});
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Create a backend and wait for it to load.
|
|
* The returned 'backend' object may be null if there is no data to read.
|
|
*
|
|
* @returns {Promise}
|
|
*/
|
|
|
|
}, {
|
|
key: '_openBackend',
|
|
value: function _openBackend() {
|
|
var _this2 = this;
|
|
|
|
return new Promise(function (resolve, reject) {
|
|
if (_this2._backend) {
|
|
resolve(_this2._backend);
|
|
} else if (_this2.eof) {
|
|
reject(new Error('cannot open at end of file'));
|
|
} else {
|
|
var cache = _this2._cache;
|
|
var max = _this2._chunkSize;
|
|
|
|
// Seek forward to the next unread point, up to chunk size
|
|
var readable = cache.bytesReadable(max);
|
|
var readTail = cache.readOffset + readable;
|
|
cache.seekWrite(readTail);
|
|
|
|
// Did we already cache the entire file?
|
|
if (_this2.length >= 0 && readTail >= _this2.length) {
|
|
resolve(null);
|
|
return;
|
|
}
|
|
|
|
// Do we have space to write within that chunk?
|
|
var writable = cache.bytesWritable(max);
|
|
if (writable === 0) {
|
|
// Nothing to read/write within the current readahead area.
|
|
resolve(null);
|
|
} else {
|
|
(function () {
|
|
var backend = _this2._backend = new Backend({
|
|
url: _this2.url,
|
|
offset: _this2._cache.writeOffset,
|
|
length: writable,
|
|
cachever: _this2._cachever
|
|
});
|
|
|
|
var oncomplete = null;
|
|
|
|
var checkOpen = function checkOpen() {
|
|
if (backend !== _this2._backend) {
|
|
oncomplete();
|
|
reject(new Error('invalid state'));
|
|
} else {
|
|
backend.on('buffer', function (buffer) {
|
|
if (backend === _this2._backend) {
|
|
_this2._cache.write(buffer);
|
|
}
|
|
});
|
|
backend.on('done', function () {
|
|
if (backend === _this2._backend) {
|
|
if (_this2.length === -1) {
|
|
// save length on those final thingies
|
|
_this2.length = _this2._backend.offset + _this2._backend.bytesRead;
|
|
}
|
|
_this2._backend = null;
|
|
}
|
|
});
|
|
resolve(backend);
|
|
}
|
|
};
|
|
|
|
var checkError = function checkError(err) {
|
|
if (backend !== _this2._backend) {
|
|
reject(new Error('invalid state'));
|
|
} else {
|
|
_this2._backend = null;
|
|
reject(err);
|
|
}
|
|
};
|
|
|
|
oncomplete = function oncomplete() {
|
|
backend.off('open', checkOpen);
|
|
backend.off('error', checkError);
|
|
};
|
|
backend.on('open', checkOpen);
|
|
backend.on('error', checkError);
|
|
backend.on('cachever', function () {
|
|
_this2._cachever++;
|
|
});
|
|
|
|
backend.load();
|
|
})();
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* If we have empty space within the readahead area and there is not already
|
|
* a download backend in place, create one and start it loading in background.
|
|
* @returns {Promise}
|
|
*/
|
|
|
|
}, {
|
|
key: '_readAhead',
|
|
value: function _readAhead() {
|
|
var _this3 = this;
|
|
|
|
return new Promise(function (resolve, reject) {
|
|
if (_this3._backend || _this3.eof) {
|
|
// do nothing
|
|
resolve();
|
|
} else {
|
|
_this3._openBackend().then(function () {
|
|
resolve();
|
|
}).catch(function (err) {
|
|
reject(err);
|
|
});
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Seek the read position to a new location in the file, asynchronously.
|
|
* After succesful completion, reads will continue at the new offset.
|
|
* May fail due to network problems, invalid input, or bad state.
|
|
* @param {number} offset - target byte offset from beginning of file
|
|
* @returns {Promise} - resolved when ready to read at the new position
|
|
*/
|
|
|
|
}, {
|
|
key: 'seek',
|
|
value: function seek(offset) {
|
|
var _this4 = this;
|
|
|
|
return new Promise(function (resolve, reject) {
|
|
if (!_this4.loaded || _this4.buffering || _this4.seeking) {
|
|
throw new Error('invalid state');
|
|
} else if (offset !== (offset | 0) || offset < 0) {
|
|
throw new Error('invalid input');
|
|
} else if (_this4.length >= 0 && offset > _this4.length) {
|
|
throw new Error('seek past end of file');
|
|
} else if (!_this4.seekable) {
|
|
throw new Error('seek on non-seekable stream');
|
|
} else {
|
|
if (_this4._backend) {
|
|
// @todo if a short seek forward, just keep reading?
|
|
_this4.abort();
|
|
}
|
|
_this4._cache.seekRead(offset);
|
|
_this4._cache.seekWrite(offset);
|
|
|
|
// Fire off a download if necessary.
|
|
_this4._readAhead().then(resolve).catch(reject);
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Read up to the requested number of bytes, or until end of file is reached,
|
|
* and advance the read head.
|
|
*
|
|
* May wait on network activity if data is not yet available.
|
|
*
|
|
* @param {number} nbytes - max number of bytes to read
|
|
* @returns {ArrayBuffer} - between 0 and nbytes of data, inclusive
|
|
*/
|
|
|
|
}, {
|
|
key: 'read',
|
|
value: function read(nbytes) {
|
|
var _this5 = this;
|
|
|
|
return this.buffer(nbytes).then(function (available) {
|
|
return _this5.readSync(available);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Read up to the requested number of bytes, or however much is available
|
|
* in the buffer until the next empty segment, and advance the read head.
|
|
*
|
|
* Returns immediately.
|
|
*
|
|
* @param {number} nbytes - max number of bytes to read
|
|
* @returns {ArrayBuffer} - between 0 and nbytes of data, inclusive
|
|
*/
|
|
|
|
}, {
|
|
key: 'readSync',
|
|
value: function readSync(nbytes) {
|
|
var available = this.bytesAvailable(nbytes);
|
|
var dest = new Uint8Array(available);
|
|
var actual = this.readBytes(dest);
|
|
if (actual !== available) {
|
|
throw new Error('failed to read expected data');
|
|
}
|
|
return dest.buffer;
|
|
}
|
|
|
|
/**
|
|
* Read bytes into destination array until out of buffer or space,
|
|
* and advance the read head.
|
|
*
|
|
* Returns immediately.
|
|
*
|
|
* @param {dest} Uint8Array - destination byte array
|
|
* @returns {number} - count of actual bytes read
|
|
*/
|
|
|
|
}, {
|
|
key: 'readBytes',
|
|
value: function readBytes(dest) {
|
|
if (!this.loaded || this.buffering || this.seeking) {
|
|
throw new Error('invalid state');
|
|
} else if (!(dest instanceof Uint8Array)) {
|
|
throw new Error('invalid input');
|
|
}
|
|
var nbytes = this._cache.readBytes(dest);
|
|
|
|
// Trigger readahead if necessary.
|
|
this._readAhead();
|
|
|
|
return nbytes;
|
|
}
|
|
|
|
/**
|
|
* Wait until the given number of bytes are available to read, or end of file.
|
|
* @param {number} nbytes - max bytes to wait for
|
|
* @returns {Promise} - resolved with available byte count when ready
|
|
*/
|
|
|
|
}, {
|
|
key: 'buffer',
|
|
value: function buffer(nbytes) {
|
|
var _this6 = this;
|
|
|
|
return new Promise(function (resolve, reject) {
|
|
if (!_this6.loaded || _this6.buffering || _this6.seeking) {
|
|
throw new Error('invalid state');
|
|
} else if (nbytes !== (nbytes | 0) || nbytes < 0) {
|
|
throw new Error('invalid input');
|
|
}
|
|
var end = _this6._clampToLength(_this6.offset + nbytes);
|
|
var readable = end - _this6.offset;
|
|
|
|
var canceled = false;
|
|
|
|
var available = _this6.bytesAvailable(readable);
|
|
if (available >= readable) {
|
|
// Requested data is immediately available.
|
|
resolve(available);
|
|
} else {
|
|
_this6.buffering = true;
|
|
|
|
// If we don't already have a backend open, start downloading.
|
|
_this6._openBackend().then(function (backend) {
|
|
if (backend) {
|
|
return backend.bufferToOffset(end).then(function () {
|
|
// We might have to roll over to another download,
|
|
// so loop back around!
|
|
_this6.buffering = false;
|
|
return _this6.buffer(nbytes);
|
|
});
|
|
} else {
|
|
// No more data to read.
|
|
return Promise.resolve(available);
|
|
}
|
|
}).then(function (available) {
|
|
_this6.buffering = false;
|
|
resolve(available);
|
|
}).catch(function (err) {
|
|
if (err.name !== 'AbortError') {
|
|
// was already set synchronously; avoid stomping on old promise
|
|
_this6.buffering = false;
|
|
}
|
|
reject(err);
|
|
});
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Number of bytes available to read immediately from the current offset.
|
|
* This is the max number of bytes that can be returned from a read() call.
|
|
* @returns {boolean}
|
|
*/
|
|
|
|
}, {
|
|
key: 'bytesAvailable',
|
|
value: function bytesAvailable() {
|
|
var max = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : Infinity;
|
|
|
|
return this._cache.bytesReadable(max);
|
|
}
|
|
|
|
/**
|
|
* Abort any currently running downloads and operations.
|
|
*/
|
|
|
|
}, {
|
|
key: 'abort',
|
|
value: function abort() {
|
|
// Clear state synchronously, so can immediately launch new i/o...
|
|
if (this.loading) {
|
|
this.loading = false;
|
|
}
|
|
if (this.buffering) {
|
|
this.buffering = false;
|
|
}
|
|
if (this.seeking) {
|
|
this.seeking = false;
|
|
}
|
|
|
|
// Abort any active backend request...
|
|
if (this._backend) {
|
|
this._backend.abort();
|
|
this._backend = null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return an array of byte ranges that are buffered.
|
|
* Each range is a two-element array of start and end.
|
|
* @returns {Array<Array<number>>}
|
|
*/
|
|
|
|
}, {
|
|
key: 'getBufferedRanges',
|
|
value: function getBufferedRanges() {
|
|
return this._cache.ranges();
|
|
}
|
|
|
|
// ------
|
|
// private methods
|
|
// ------
|
|
|
|
}, {
|
|
key: '_clampToLength',
|
|
value: function _clampToLength(offset) {
|
|
if (this.length < 0) {
|
|
return offset;
|
|
} else {
|
|
return Math.min(this.length, offset);
|
|
}
|
|
}
|
|
}]);
|
|
|
|
return StreamFile;
|
|
}();
|
|
|
|
module.exports = StreamFile;
|
|
|
|
|
|
/***/ }),
|
|
/* 20 */
|
|
/***/ (function(module, exports) {
|
|
|
|
"use strict";
|
|
|
|
// just the bits we need
|
|
|
|
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
|
|
|
|
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
|
|
|
|
var TinyEvents = function () {
|
|
function TinyEvents() {
|
|
_classCallCheck(this, TinyEvents);
|
|
|
|
this._e = {};
|
|
}
|
|
|
|
_createClass(TinyEvents, [{
|
|
key: "on",
|
|
value: function on(name, handler) {
|
|
(this._e[name] || (this._e[name] = [])).push(handler);
|
|
}
|
|
}, {
|
|
key: "off",
|
|
value: function off(name, handler) {
|
|
var l = this._e[name] || [];
|
|
var i = l.indexOf(handler);
|
|
if (handler >= 0) {
|
|
l.splice(i, 1);
|
|
}
|
|
}
|
|
}, {
|
|
key: "emit",
|
|
value: function emit(name, arg) {
|
|
(this._e[name] || []).slice().forEach(function (f) {
|
|
return f(arg);
|
|
});
|
|
}
|
|
}]);
|
|
|
|
return TinyEvents;
|
|
}();
|
|
|
|
module.exports = TinyEvents;
|
|
|
|
|
|
/***/ }),
|
|
/* 21 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
|
|
module.exports = __webpack_require__(22);
|
|
|
|
|
|
/***/ }),
|
|
/* 22 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
|
|
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
|
|
|
|
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
|
|
|
|
var CacheItem = __webpack_require__(23);
|
|
|
|
/**
|
|
* Seekable, readable, writable buffer cache to represent a file.
|
|
* @todo add max cache size and LRU cache expiration
|
|
*
|
|
* Internally, will always contain entries from 0 to some given out point.
|
|
* Each item may either contain data, or be empty.
|
|
* Empty ranges cannot be copied out via read(), non-empty ranges can.
|
|
* Empty ranges can be filled up with write(), non-empty ranges cannot.
|
|
*
|
|
* Internal invariants:
|
|
* - head and tail are always present, may be same for empty
|
|
* - tail item is always empty/eof
|
|
* - non-empty items are never 0 bytes
|
|
* - adjacent list items are always continguous
|
|
* - empty items are never adjacent to each other
|
|
*/
|
|
|
|
var CachePool = function () {
|
|
function CachePool() {
|
|
var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
|
|
|
|
var _ref$cacheSize = _ref.cacheSize;
|
|
var cacheSize = _ref$cacheSize === undefined ? 0 : _ref$cacheSize;
|
|
|
|
_classCallCheck(this, CachePool);
|
|
|
|
var eof = new CacheItem({ eof: true });
|
|
this.head = eof;
|
|
this.tail = eof;
|
|
this.readOffset = 0;
|
|
this.readCursor = eof;
|
|
this.writeOffset = 0;
|
|
this.writeCursor = eof;
|
|
this.cacheSize = cacheSize;
|
|
}
|
|
|
|
/**
|
|
* Is the read cursor at the end of the file?
|
|
*/
|
|
|
|
|
|
_createClass(CachePool, [{
|
|
key: 'bytesReadable',
|
|
|
|
|
|
/**
|
|
* Count how many bytes are available from the given offset.
|
|
* @param {number} max - optional maximum to read
|
|
* @returns {number} 0 or more
|
|
*/
|
|
value: function bytesReadable() {
|
|
var max = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : Infinity;
|
|
|
|
var offset = this.readOffset;
|
|
var cursor = this.readCursor;
|
|
var last = cursor.last(function (item) {
|
|
return !item.empty && item.start <= offset + max;
|
|
});
|
|
if (last) {
|
|
return Math.min(max, last.end - offset);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Count how many bytes are available to write.
|
|
* @param {number} max - optional maximum to write
|
|
* @returns {number} 0 or more, or +Infinity
|
|
*/
|
|
|
|
}, {
|
|
key: 'bytesWritable',
|
|
value: function bytesWritable() {
|
|
var max = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : Infinity;
|
|
|
|
var offset = this.writeOffset;
|
|
var cursor = this.writeCursor;
|
|
if (cursor.eof) {
|
|
return max;
|
|
}
|
|
var last = cursor.last(function (item) {
|
|
return item.empty && item.start <= offset + max;
|
|
});
|
|
if (last) {
|
|
return Math.min(max, last.end - offset);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Move the read head to a given offset. The read head can move beyond the
|
|
* currently known end of the file, but cannot move before 0.
|
|
* @param {number} offset - bytes from beginning of virtual file to read from
|
|
*/
|
|
|
|
}, {
|
|
key: 'seekRead',
|
|
value: function seekRead(offset) {
|
|
var target = this.head.first(function (item) {
|
|
return item.contains(offset);
|
|
});
|
|
if (!target) {
|
|
throw new Error('read seek out of range');
|
|
}
|
|
this.readOffset = offset;
|
|
this.readCursor = target;
|
|
}
|
|
|
|
/**
|
|
* Move the write head to a given offset. The write head can move beyond the
|
|
* currently known end of the file, but cannot move before 0.
|
|
* @param {number} offset - bytes from beginning of virtual file to write to
|
|
*/
|
|
|
|
}, {
|
|
key: 'seekWrite',
|
|
value: function seekWrite(offset) {
|
|
var target = this.head.first(function (item) {
|
|
return item.contains(offset);
|
|
});
|
|
if (!target) {
|
|
throw new Error('write seek out of range');
|
|
}
|
|
this.writeOffset = offset;
|
|
this.writeCursor = target;
|
|
}
|
|
|
|
/**
|
|
* Read up to the requested number of bytes, or however much is available
|
|
* in the buffer until the next empty segment, and advance the read head.
|
|
*
|
|
* Returns immediately.
|
|
*
|
|
* @param {Uint8Array} dest - destination array to read to
|
|
* @returns {number} - count of bytes actually read
|
|
*/
|
|
|
|
}, {
|
|
key: 'readBytes',
|
|
value: function readBytes(dest) {
|
|
var nbytes = dest.byteLength;
|
|
var len = this.bytesReadable(nbytes);
|
|
var start = this.readOffset;
|
|
var end = start + len;
|
|
|
|
var readHead = start;
|
|
var writeHead = 0;
|
|
for (var item = this.readCursor; item; item = item.next) {
|
|
if (item.empty) {
|
|
break;
|
|
}
|
|
if (item.start >= end) {
|
|
break;
|
|
}
|
|
var readTail = Math.min(end, item.end);
|
|
var chunk = dest.subarray(readHead - start, readTail - start);
|
|
item.readBytes(chunk, readHead, readTail);
|
|
readHead = readTail;
|
|
}
|
|
this.readOffset = readHead;
|
|
this.readCursor = this.readCursor.first(function (item) {
|
|
return item.contains(readHead);
|
|
});
|
|
|
|
return len;
|
|
}
|
|
|
|
/**
|
|
* Write a data buffer at the write head and advance the write head.
|
|
* The data must fit in the available empty space in the buffer cache.
|
|
* @param {ArrayBuffer|String} buffer
|
|
*/
|
|
|
|
}, {
|
|
key: 'write',
|
|
value: function write(buffer) {
|
|
var item = this.bufferItem(buffer);
|
|
var cursor = this.writeCursor;
|
|
|
|
if (!cursor.empty) {
|
|
throw new Error('write cursor not empty');
|
|
}
|
|
if (!cursor.contains(item.end) && cursor.end !== item.end) {
|
|
throw new Error('write cursor too small');
|
|
}
|
|
|
|
if (cursor.start < item.start) {
|
|
this.split(cursor, item.start);
|
|
cursor = this.writeCursor;
|
|
}
|
|
|
|
if (item.end < cursor.end || cursor.eof) {
|
|
this.split(cursor, item.end);
|
|
cursor = this.writeCursor;
|
|
}
|
|
|
|
this.splice(cursor, cursor, item, item);
|
|
this.writeOffset = item.end;
|
|
this.writeCursor = item.next;
|
|
|
|
this.gc();
|
|
}
|
|
}, {
|
|
key: 'bufferItem',
|
|
value: function bufferItem(buffer) {
|
|
if (buffer instanceof ArrayBuffer) {
|
|
return new CacheItem({
|
|
start: this.writeOffset,
|
|
end: this.writeOffset + buffer.byteLength,
|
|
buffer: buffer
|
|
});
|
|
} else if (typeof buffer === 'string') {
|
|
return new CacheItem({
|
|
start: this.writeOffset,
|
|
end: this.writeOffset + buffer.length,
|
|
string: buffer
|
|
});
|
|
} else {
|
|
throw new Error('invalid input to write');
|
|
}
|
|
}
|
|
}, {
|
|
key: 'split',
|
|
value: function split(oldItem, offset) {
|
|
var items = oldItem.split(offset);
|
|
this.splice(oldItem, oldItem, items[0], items[1]);
|
|
}
|
|
|
|
/**
|
|
* Return an array of arrays of consolidated cached ranges
|
|
*/
|
|
|
|
}, {
|
|
key: 'ranges',
|
|
value: function ranges() {
|
|
var ranges = [];
|
|
|
|
for (var item = this.head; item; item = item.next) {
|
|
if (item.empty) {
|
|
continue;
|
|
}
|
|
var start = item;
|
|
item = item.last(function (i) {
|
|
return !i.empty;
|
|
});
|
|
ranges.push([start.start, item.end]);
|
|
}
|
|
|
|
return ranges;
|
|
}
|
|
}, {
|
|
key: 'gc',
|
|
value: function gc() {
|
|
// Simple gc: look at anything not between read head and write head,
|
|
// and discard the oldest items until we have room
|
|
var cachedBytes = 0;
|
|
var candidates = [];
|
|
for (var item = this.head; item; item = item.next) {
|
|
if (!item.empty) {
|
|
cachedBytes += item.length;
|
|
if (item.end < this.readOffset || item.start > this.readOffset + this.chunkSize) {
|
|
// Not in the 'hot' readahead range
|
|
candidates.push(item);
|
|
}
|
|
}
|
|
}
|
|
if (cachedBytes > this.cacheSize) {
|
|
candidates.sort(function (a, b) {
|
|
return a.timestamp - b.timestamp;
|
|
});
|
|
|
|
for (var i = 0; i < candidates.length; i++) {
|
|
var _item = candidates[i];
|
|
if (cachedBytes <= this.cacheSize) {
|
|
break;
|
|
}
|
|
this.remove(_item);
|
|
cachedBytes -= _item.length;
|
|
}
|
|
}
|
|
}
|
|
}, {
|
|
key: 'remove',
|
|
value: function remove(item) {
|
|
var replacement = new CacheItem({
|
|
start: item.start,
|
|
end: item.end
|
|
});
|
|
this.splice(item, item, replacement, replacement);
|
|
item = replacement;
|
|
|
|
// Consolidate adjacent ranges
|
|
if (item.prev && item.prev.empty) {
|
|
item = this.consolidate(item.prev);
|
|
}
|
|
if (item.next && item.next.empty && !item.next.eof) {
|
|
item = this.consolidate(item);
|
|
}
|
|
if (item.start === 0) {
|
|
this.head = item;
|
|
}
|
|
}
|
|
}, {
|
|
key: 'consolidate',
|
|
value: function consolidate(first) {
|
|
var last = first.last(function (item) {
|
|
return item.empty && !item.eof;
|
|
});
|
|
var replacement = new CacheItem({
|
|
start: first.start,
|
|
end: last.end
|
|
});
|
|
this.splice(first, last, replacement, replacement);
|
|
return replacement;
|
|
}
|
|
}, {
|
|
key: 'splice',
|
|
value: function splice(oldHead, oldTail, newHead, newTail) {
|
|
var _this = this;
|
|
|
|
if (oldHead.start !== newHead.start) {
|
|
throw new Error('invalid splice head');
|
|
}
|
|
if (oldTail.end !== newTail.end) {
|
|
if (oldTail.eof && newTail.eof) {
|
|
// only eof is expandable
|
|
} else {
|
|
throw new Error('invalid splice tail');
|
|
}
|
|
}
|
|
var prev = oldHead.prev;
|
|
var next = oldTail.next;
|
|
|
|
oldHead.prev = null;
|
|
oldTail.next = null;
|
|
|
|
if (prev) {
|
|
prev.next = newHead;
|
|
newHead.prev = prev;
|
|
}
|
|
if (next) {
|
|
next.prev = newTail;
|
|
newTail.next = next;
|
|
}
|
|
|
|
if (oldHead === this.head) {
|
|
this.head = newHead;
|
|
}
|
|
if (oldTail === this.tail) {
|
|
this.tail = newTail;
|
|
}
|
|
this.readCursor = this.head.first(function (item) {
|
|
return item.contains(_this.readOffset);
|
|
});
|
|
this.writeCursor = this.head.first(function (item) {
|
|
return item.contains(_this.writeOffset);
|
|
});
|
|
}
|
|
}, {
|
|
key: 'eof',
|
|
get: function get() {
|
|
return this.readCursor.eof;
|
|
}
|
|
}]);
|
|
|
|
return CachePool;
|
|
}();
|
|
|
|
module.exports = CachePool;
|
|
|
|
|
|
/***/ }),
|
|
/* 23 */
|
|
/***/ (function(module, exports) {
|
|
|
|
"use strict";
|
|
|
|
/**
|
|
* Double-linked list cache items
|
|
*/
|
|
|
|
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
|
|
|
|
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
|
|
|
|
var CacheItem = function () {
|
|
function CacheItem() {
|
|
var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
|
|
|
|
var _ref$buffer = _ref.buffer;
|
|
var buffer = _ref$buffer === undefined ? undefined : _ref$buffer;
|
|
var _ref$string = _ref.string;
|
|
var string = _ref$string === undefined ? undefined : _ref$string;
|
|
var _ref$start = _ref.start;
|
|
var start = _ref$start === undefined ? 0 : _ref$start;
|
|
var _ref$end = _ref.end;
|
|
var end = _ref$end === undefined ? start + (buffer ? buffer.byteLength : string ? string.length : 0) : _ref$end;
|
|
var _ref$prev = _ref.prev;
|
|
var prev = _ref$prev === undefined ? null : _ref$prev;
|
|
var _ref$next = _ref.next;
|
|
var next = _ref$next === undefined ? null : _ref$next;
|
|
var _ref$eof = _ref.eof;
|
|
var eof = _ref$eof === undefined ? false : _ref$eof;
|
|
var _ref$empty = _ref.empty;
|
|
var empty = _ref$empty === undefined ? !(buffer || string) : _ref$empty;
|
|
var _ref$timestamp = _ref.timestamp;
|
|
var timestamp = _ref$timestamp === undefined ? Date.now() : _ref$timestamp;
|
|
|
|
_classCallCheck(this, CacheItem);
|
|
|
|
this.start = start;
|
|
this.end = end;
|
|
this.prev = prev;
|
|
this.next = next;
|
|
this.eof = eof;
|
|
this.empty = empty;
|
|
this.timestamp = timestamp;
|
|
this.buffer = buffer;
|
|
this.string = string;
|
|
Object.defineProperty(this, 'length', {
|
|
get: function get() {
|
|
return this.end - this.start;
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* True if this cache item contains the given byte offset.
|
|
* False if outside.
|
|
*/
|
|
|
|
|
|
_createClass(CacheItem, [{
|
|
key: 'contains',
|
|
value: function contains(offset) {
|
|
return offset >= this.start && (offset < this.end || this.eof);
|
|
}
|
|
}, {
|
|
key: 'readBytes',
|
|
value: function readBytes(dest, start, end) {
|
|
var readHead = start - this.start;
|
|
var len = end - start;
|
|
if (this.buffer) {
|
|
var sourceBytes = new Uint8Array(this.buffer, readHead, len);
|
|
dest.set(sourceBytes);
|
|
} else if (this.string) {
|
|
var chunk = this.string;
|
|
for (var i = 0; i < len; i++) {
|
|
dest[i] = chunk.charCodeAt(readHead + i);
|
|
}
|
|
} else {
|
|
throw new Error('invalid state');
|
|
}
|
|
this.timestamp = Date.now();
|
|
}
|
|
}, {
|
|
key: 'split',
|
|
value: function split(offset) {
|
|
if (!this.empty || !this.contains(offset)) {
|
|
throw new Error('invalid split');
|
|
}
|
|
var a = new CacheItem({
|
|
start: this.start,
|
|
end: offset
|
|
});
|
|
var b = new CacheItem({
|
|
start: offset,
|
|
end: this.eof ? offset : this.end,
|
|
eof: this.eof
|
|
});
|
|
a.next = b;
|
|
b.prev = a;
|
|
return [a, b];
|
|
}
|
|
|
|
/**
|
|
* Iterate forwards, returning the first element matching the callback.
|
|
* @param {function} callback - return true for a match on item
|
|
* @returns {CacheItem|null} - matching item or null if none found
|
|
*/
|
|
|
|
}, {
|
|
key: 'first',
|
|
value: function first(callback) {
|
|
for (var item = this; item; item = item.next) {
|
|
if (callback(item)) {
|
|
return item;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Iterate forwards, returning the last element matching the callback before
|
|
* reaching one that doesn't match or we find the end.
|
|
* @param {function} callback - return true for a match on item
|
|
* @returns {CacheItem|null} - matching item or null if none found
|
|
*/
|
|
|
|
}, {
|
|
key: 'last',
|
|
value: function last(callback) {
|
|
var last = null;
|
|
for (var item = this; item; item = item.next) {
|
|
if (!callback(item)) {
|
|
break;
|
|
}
|
|
last = item;
|
|
}
|
|
return last;
|
|
}
|
|
}]);
|
|
|
|
return CacheItem;
|
|
}();
|
|
|
|
module.exports = CacheItem;
|
|
|
|
|
|
/***/ }),
|
|
/* 24 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
|
|
var MozChunkedBackend = __webpack_require__(25);
|
|
var MSStreamBackend = __webpack_require__(28);
|
|
var BinaryStringBackend = __webpack_require__(29);
|
|
|
|
function autoselect() {
|
|
if (MozChunkedBackend.supported()) {
|
|
return MozChunkedBackend;
|
|
} else if (BinaryStringBackend.supported()) {
|
|
return BinaryStringBackend;
|
|
} else if (MSStreamBackend.supported()) {
|
|
return MSStreamBackend;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
var backendClass = null;
|
|
|
|
function instantiate(options) {
|
|
if (!backendClass) {
|
|
backendClass = autoselect();
|
|
}
|
|
if (!backendClass) {
|
|
throw new Error('No supported backend class');
|
|
}
|
|
return new backendClass(options);
|
|
}
|
|
|
|
module.exports = instantiate;
|
|
|
|
|
|
/***/ }),
|
|
/* 25 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
|
|
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
|
|
|
|
var _get = function get(object, property, receiver) { if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { return get(parent, property, receiver); } } else if ("value" in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } };
|
|
|
|
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
|
|
|
|
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
|
|
|
|
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
|
|
|
|
var DownloadBackend = __webpack_require__(26);
|
|
|
|
var type = 'moz-chunked-arraybuffer';
|
|
|
|
var MozChunkedBackend = function (_DownloadBackend) {
|
|
_inherits(MozChunkedBackend, _DownloadBackend);
|
|
|
|
function MozChunkedBackend() {
|
|
_classCallCheck(this, MozChunkedBackend);
|
|
|
|
return _possibleConstructorReturn(this, (MozChunkedBackend.__proto__ || Object.getPrototypeOf(MozChunkedBackend)).apply(this, arguments));
|
|
}
|
|
|
|
_createClass(MozChunkedBackend, [{
|
|
key: 'initXHR',
|
|
value: function initXHR() {
|
|
_get(MozChunkedBackend.prototype.__proto__ || Object.getPrototypeOf(MozChunkedBackend.prototype), 'initXHR', this).call(this);
|
|
this.xhr.responseType = type;
|
|
}
|
|
}, {
|
|
key: 'onXHRProgress',
|
|
value: function onXHRProgress() {
|
|
var buffer = this.xhr.response;
|
|
this.bytesRead += buffer.byteLength;
|
|
this.emit('buffer', buffer);
|
|
}
|
|
}]);
|
|
|
|
return MozChunkedBackend;
|
|
}(DownloadBackend);
|
|
|
|
MozChunkedBackend.supported = function () {
|
|
try {
|
|
var xhr = new XMLHttpRequest();
|
|
xhr.responseType = type;
|
|
return xhr.responseType === type;
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
};
|
|
|
|
module.exports = MozChunkedBackend;
|
|
|
|
|
|
/***/ }),
|
|
/* 26 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
|
|
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
|
|
|
|
var _get = function get(object, property, receiver) { if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { return get(parent, property, receiver); } } else if ("value" in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } };
|
|
|
|
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
|
|
|
|
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
|
|
|
|
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
|
|
|
|
var Backend = __webpack_require__(27);
|
|
|
|
/**
|
|
* Backend for progressive downloading.
|
|
* Subclasses handle details of strings/buffers.
|
|
*/
|
|
|
|
var DownloadBackend = function (_Backend) {
|
|
_inherits(DownloadBackend, _Backend);
|
|
|
|
function DownloadBackend() {
|
|
_classCallCheck(this, DownloadBackend);
|
|
|
|
return _possibleConstructorReturn(this, (DownloadBackend.__proto__ || Object.getPrototypeOf(DownloadBackend)).apply(this, arguments));
|
|
}
|
|
|
|
_createClass(DownloadBackend, [{
|
|
key: 'bufferToOffset',
|
|
value: function bufferToOffset(end) {
|
|
var _this2 = this;
|
|
|
|
return new Promise(function (resolve, reject) {
|
|
if (_this2.eof || _this2.offset >= end) {
|
|
resolve();
|
|
} else {
|
|
(function () {
|
|
var oncomplete = null;
|
|
_this2._onAbort = function (err) {
|
|
oncomplete();
|
|
reject(reason);
|
|
};
|
|
|
|
var checkBuffer = function checkBuffer() {
|
|
if (_this2.offset >= end && !_this2.eof) {
|
|
oncomplete();
|
|
resolve();
|
|
}
|
|
};
|
|
var checkDone = function checkDone() {
|
|
oncomplete();
|
|
resolve();
|
|
};
|
|
var checkError = function checkError() {
|
|
oncomplete();
|
|
reject(new Error('error streaming'));
|
|
};
|
|
|
|
oncomplete = function oncomplete() {
|
|
_this2.buffering = false;
|
|
_this2.off('buffer', checkBuffer);
|
|
_this2.off('done', checkDone);
|
|
_this2.off('error', checkError);
|
|
_this2._onAbort = null;
|
|
};
|
|
|
|
_this2.buffering = true;
|
|
_this2.on('buffer', checkBuffer);
|
|
_this2.on('done', checkDone);
|
|
_this2.on('error', checkError);
|
|
})();
|
|
}
|
|
});
|
|
}
|
|
}, {
|
|
key: 'initXHR',
|
|
value: function initXHR() {
|
|
_get(DownloadBackend.prototype.__proto__ || Object.getPrototypeOf(DownloadBackend.prototype), 'initXHR', this).call(this);
|
|
}
|
|
}, {
|
|
key: 'onXHRStart',
|
|
value: function onXHRStart() {
|
|
var _this3 = this;
|
|
|
|
// Event handlers to drive output
|
|
this.xhr.addEventListener('progress', function () {
|
|
return _this3.onXHRProgress();
|
|
});
|
|
this.xhr.addEventListener('error', function () {
|
|
return _this3.onXHRError();
|
|
});
|
|
this.xhr.addEventListener('load', function () {
|
|
return _this3.onXHRLoad();
|
|
});
|
|
|
|
this.emit('open');
|
|
}
|
|
}, {
|
|
key: 'onXHRProgress',
|
|
value: function onXHRProgress() {
|
|
throw new Error('abstract');
|
|
}
|
|
}, {
|
|
key: 'onXHRError',
|
|
value: function onXHRError() {
|
|
this.emit('error');
|
|
}
|
|
}, {
|
|
key: 'onXHRLoad',
|
|
value: function onXHRLoad() {
|
|
this.eof = true;
|
|
this.emit('done');
|
|
}
|
|
}]);
|
|
|
|
return DownloadBackend;
|
|
}(Backend);
|
|
|
|
module.exports = DownloadBackend;
|
|
|
|
|
|
/***/ }),
|
|
/* 27 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
|
|
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
|
|
|
|
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
|
|
|
|
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
|
|
|
|
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
|
|
|
|
var TinyEvents = __webpack_require__(20);
|
|
|
|
/**
|
|
* Extract the file's total length from the XHR returned headers.
|
|
* @returns {number} - byte length or -1
|
|
* @access private
|
|
*/
|
|
function getXHRLength(xhr) {
|
|
if (xhr.status == 206) {
|
|
return getXHRRangeTotal(xhr);
|
|
} else {
|
|
var contentLength = xhr.getResponseHeader('Content-Length');
|
|
if (contentLength === null || contentLength === '') {
|
|
// Unknown file length... maybe streaming live?
|
|
return -1;
|
|
} else {
|
|
return parseInt(contentLength, 10);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Extract the range chunk info from the XHR returned headers.
|
|
* @returns {Array} - byte length or -1
|
|
* @access private
|
|
*/
|
|
function getXHRRangeMatches(xhr) {
|
|
// Note Content-Range must be whitelisted for CORS requests
|
|
var contentRange = xhr.getResponseHeader('Content-Range');
|
|
return contentRange && contentRange.match(/^bytes (\d+)-(\d+)\/(\d+)/);
|
|
}
|
|
|
|
/**
|
|
* Extract the chunk start position from the XHR returned headers.
|
|
* @returns {number} - byte position or 0
|
|
* @access private
|
|
*/
|
|
function getXHRRangeStart(xhr) {
|
|
var matches = getXHRRangeMatches(xhr);
|
|
if (matches) {
|
|
return parseInt(matches[1], 10);
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Extract the file's total length from the XHR returned headers.
|
|
* @returns {number} - byte length or -1
|
|
* @access private
|
|
*/
|
|
function getXHRRangeTotal(xhr) {
|
|
var matches = getXHRRangeMatches(xhr);
|
|
if (matches) {
|
|
return parseInt(matches[3], 10);
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Record the HTTP headers from the initial request, in case some are useful.
|
|
* @returns {Object} map of headers
|
|
* @access private
|
|
*/
|
|
function getXHRHeaders(xhr) {
|
|
var headers = {};
|
|
var headerLines = xhr.getAllResponseHeaders().split(/\n/);
|
|
headerLines.forEach(function (line) {
|
|
var bits = line.split(/:\s*/, 2);
|
|
if (bits.length > 1) {
|
|
headers[bits[0].toLowerCase()] = bits[1];
|
|
}
|
|
});
|
|
return headers;
|
|
}
|
|
|
|
/**
|
|
* Represents a single HTTP request pass through part of a URL.
|
|
*
|
|
* Subclasses handle details of chunking/strings/streams and provide
|
|
* a unified internal API.
|
|
*
|
|
* Events sent:
|
|
* - 'open' - called when file metadata ready
|
|
* - 'buffer' - passes a BufferSegment in with some new data
|
|
* - 'done' - called at end of file
|
|
* - 'error' - called in case of error
|
|
* - 'cachever' - triggered when old Safari caching bug found
|
|
*/
|
|
|
|
var Backend = function (_TinyEvents) {
|
|
_inherits(Backend, _TinyEvents);
|
|
|
|
function Backend(_ref) {
|
|
var url = _ref.url;
|
|
var offset = _ref.offset;
|
|
var length = _ref.length;
|
|
var _ref$cachever = _ref.cachever;
|
|
var cachever = _ref$cachever === undefined ? 0 : _ref$cachever;
|
|
|
|
_classCallCheck(this, Backend);
|
|
|
|
var _this = _possibleConstructorReturn(this, (Backend.__proto__ || Object.getPrototypeOf(Backend)).call(this));
|
|
|
|
_this.url = url;
|
|
_this.offset = offset;
|
|
_this.length = length;
|
|
_this.cachever = cachever;
|
|
|
|
_this.loaded = false;
|
|
_this.seekable = false;
|
|
_this.headers = {};
|
|
_this.eof = false;
|
|
_this.bytesRead = 0;
|
|
_this.xhr = new XMLHttpRequest();
|
|
return _this;
|
|
}
|
|
|
|
_createClass(Backend, [{
|
|
key: 'load',
|
|
value: function load() {
|
|
var _this2 = this;
|
|
|
|
return new Promise(function (resolve, reject) {
|
|
var oncomplete = null;
|
|
_this2._onAbort = function (err) {
|
|
oncomplete();
|
|
reject(err);
|
|
};
|
|
var checkOpen = function checkOpen() {
|
|
// There doesn't seem to be a good match for readyState 2 on the XHR2 events model.
|
|
if (_this2.xhr.readyState == 2) {
|
|
if (_this2.xhr.status == 206) {
|
|
// Partial content -- we are streamable
|
|
var foundPosition = getXHRRangeStart(_this2.xhr);
|
|
if (_this2.offset != foundPosition) {
|
|
//
|
|
// Safari sometimes messes up and gives us the wrong chunk.
|
|
// Seems to be a general problem with Safari and cached XHR ranges.
|
|
//
|
|
// Interestingly, it allows you to request _later_ ranges successfully,
|
|
// but when requesting _earlier_ ranges it returns the latest one retrieved.
|
|
// So we only need to update the cache-buster when we rewind and actually
|
|
// get an incorrect range.
|
|
//
|
|
// https://bugs.webkit.org/show_bug.cgi?id=82672
|
|
//
|
|
console.log('Expected start at ' + _this2.offset + ' but got ' + foundPosition + '; working around Safari range caching bug: https://bugs.webkit.org/show_bug.cgi?id=82672');
|
|
_this2.cachever++;
|
|
_this2.emit('cachever');
|
|
_this2.abort();
|
|
oncomplete();
|
|
_this2.load().then(resolve).catch(reject);
|
|
return;
|
|
}
|
|
_this2.seekable = true;
|
|
}
|
|
if (_this2.xhr.status >= 200 && _this2.xhr.status < 300) {
|
|
_this2.length = getXHRLength(_this2.xhr);
|
|
_this2.headers = getXHRHeaders(_this2.xhr);
|
|
_this2.onXHRStart();
|
|
|
|
if (_this2.xhr.responseURL &&
|
|
_this2.xhr.responseURL.substr(0, 5) == 'data:') {
|
|
_this2.seekable = true;
|
|
}
|
|
} else {
|
|
oncomplete();
|
|
reject(new Error('HTTP error ' + _this2.xhr.status));
|
|
}
|
|
}
|
|
};
|
|
var checkError = function checkError() {
|
|
oncomplete();
|
|
reject(new Error('network error'));
|
|
};
|
|
var checkBackendOpen = function checkBackendOpen() {
|
|
oncomplete();
|
|
resolve();
|
|
};
|
|
oncomplete = function oncomplete() {
|
|
_this2.xhr.removeEventListener('readystatechange', checkOpen);
|
|
_this2.xhr.removeEventListener('error', checkError);
|
|
_this2.off('open', checkBackendOpen);
|
|
_this2._onAbort = null;
|
|
};
|
|
|
|
_this2.initXHR();
|
|
|
|
// Events for the open promise
|
|
_this2.xhr.addEventListener('readystatechange', checkOpen);
|
|
_this2.xhr.addEventListener('error', checkError);
|
|
_this2.on('open', checkBackendOpen);
|
|
|
|
_this2.xhr.send();
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Wait until we download up to the given offset, reach eof, or error out.
|
|
* Actual data will be returned via 'buffer' events in the meantime.
|
|
*
|
|
* Note that MSStream backend will need this to be called explicitly,
|
|
* while the other backends download progressively even without a call.
|
|
*/
|
|
|
|
}, {
|
|
key: 'bufferToOffset',
|
|
value: function bufferToOffset(end) {
|
|
return Promise.reject(new Error('abstract'));
|
|
}
|
|
}, {
|
|
key: 'abort',
|
|
value: function abort() {
|
|
this.xhr.abort();
|
|
|
|
if (this._onAbort) {
|
|
var onAbort = this._onAbort;
|
|
this._onAbort = null;
|
|
|
|
var err = new Error('Aborted');
|
|
err.name = 'AbortError';
|
|
|
|
onAbort(err);
|
|
}
|
|
}
|
|
|
|
// ---------------
|
|
// Private methods
|
|
// ---------------
|
|
|
|
}, {
|
|
key: 'initXHR',
|
|
value: function initXHR() {
|
|
var getUrl = this.url;
|
|
if (this.cachever) {
|
|
//
|
|
// Safari sometimes messes up and gives us the wrong chunk.
|
|
// Seems to be a general problem with Safari and cached XHR ranges.
|
|
//
|
|
// Interestingly, it allows you to request _later_ ranges successfully,
|
|
// but when requesting _earlier_ ranges it returns the latest one retrieved.
|
|
// So we only need to update the cache-buster when we rewind.
|
|
//
|
|
// https://bugs.webkit.org/show_bug.cgi?id=82672
|
|
//
|
|
getUrl += '?buggy_cachever=' + this.cachever;
|
|
}
|
|
|
|
this.xhr.open("GET", getUrl);
|
|
|
|
var range = null;
|
|
if (this.offset || this.length) {
|
|
range = 'bytes=' + this.offset + '-';
|
|
}
|
|
if (this.length) {
|
|
range += this.offset + this.length - 1;
|
|
}
|
|
if (range !== null) {
|
|
this.xhr.setRequestHeader('Range', range);
|
|
}
|
|
}
|
|
}, {
|
|
key: 'onXHRStart',
|
|
value: function onXHRStart() {
|
|
throw new Error('abstract');
|
|
}
|
|
}]);
|
|
|
|
return Backend;
|
|
}(TinyEvents);
|
|
|
|
module.exports = Backend;
|
|
|
|
|
|
/***/ }),
|
|
/* 28 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
|
|
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
|
|
|
|
var _get = function get(object, property, receiver) { if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { return get(parent, property, receiver); } } else if ("value" in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } };
|
|
|
|
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
|
|
|
|
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
|
|
|
|
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
|
|
|
|
var Backend = __webpack_require__(27);
|
|
|
|
var type = 'ms-stream';
|
|
|
|
var MSStreamBackend = function (_Backend) {
|
|
_inherits(MSStreamBackend, _Backend);
|
|
|
|
function MSStreamBackend(options) {
|
|
_classCallCheck(this, MSStreamBackend);
|
|
|
|
var _this = _possibleConstructorReturn(this, (MSStreamBackend.__proto__ || Object.getPrototypeOf(MSStreamBackend)).call(this, options));
|
|
|
|
_this.stream = null;
|
|
_this.streamReader = null;
|
|
return _this;
|
|
}
|
|
|
|
_createClass(MSStreamBackend, [{
|
|
key: 'initXHR',
|
|
value: function initXHR() {
|
|
_get(MSStreamBackend.prototype.__proto__ || Object.getPrototypeOf(MSStreamBackend.prototype), 'initXHR', this).call(this);
|
|
this.xhr.responseType = type;
|
|
}
|
|
}, {
|
|
key: 'onXHRStart',
|
|
value: function onXHRStart() {
|
|
var _this2 = this;
|
|
|
|
var checkProgress = function checkProgress() {
|
|
if (_this2.xhr.readyState === 3) {
|
|
// We don't get the stream until readyState 3, and it's gone after load.
|
|
_this2.stream = _this2.xhr.response;
|
|
_this2.xhr.removeEventListener('readystatechange', checkProgress);
|
|
_this2.emit('open');
|
|
}
|
|
};
|
|
this.xhr.addEventListener('readystatechange', checkProgress);
|
|
}
|
|
}, {
|
|
key: 'waitForStream',
|
|
value: function waitForStream() {
|
|
var _this3 = this;
|
|
|
|
return new Promise(function (resolve, reject) {
|
|
if (_this3.stream) {
|
|
resolve(_this3.stream);
|
|
} else {
|
|
(function () {
|
|
var oncomplete = null;
|
|
_this3._onAbort = function (err) {
|
|
oncomplete();
|
|
reject(err);
|
|
};
|
|
var checkStart = function checkStart() {
|
|
resolve(_this3.stream);
|
|
};
|
|
oncomplete = function oncomplete() {
|
|
_this3.off('open', checkStart);
|
|
_this3._onAbort = null;
|
|
};
|
|
_this3.on('open', checkStart);
|
|
})();
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Trigger further download of bytes
|
|
* @returns {Promise}
|
|
*/
|
|
|
|
}, {
|
|
key: 'bufferToOffset',
|
|
value: function bufferToOffset(end) {
|
|
var _this4 = this;
|
|
|
|
return this.waitForStream().then(function (stream) {
|
|
return new Promise(function (resolve, reject) {
|
|
if (_this4.streamReader) {
|
|
throw new Error('cannot trigger read when reading');
|
|
}
|
|
if (_this4.offset >= end || _this4.eof) {
|
|
resolve();
|
|
} else {
|
|
var nbytes = end - _this4.offset;
|
|
_this4.streamReader = new MSStreamReader();
|
|
_this4.streamReader.onload = function (event) {
|
|
_this4.streamReader = null;
|
|
var buffer = event.target.result;
|
|
if (buffer.byteLength > 0) {
|
|
_this4.bytesRead += buffer.byteLength;
|
|
_this4.emit('buffer', buffer);
|
|
} else {
|
|
// Zero length means end of stream.
|
|
_this4.eof = true;
|
|
_this4.emit('done');
|
|
}
|
|
resolve();
|
|
};
|
|
_this4.streamReader.onerror = function () {
|
|
_this4.streamReader = null;
|
|
_this4.stream = null;
|
|
_this4.emit('error');
|
|
reject(new Error('mystery error streaming'));
|
|
};
|
|
_this4._onAbort = function (err) {
|
|
_this4.streamReader.abort();
|
|
_this4.streamReader = null;
|
|
_this4.stream = null;
|
|
_this4.emit('error');
|
|
reject(reason);
|
|
};
|
|
_this4.streamReader.readAsArrayBuffer(stream, nbytes);
|
|
}
|
|
});
|
|
});
|
|
}
|
|
}, {
|
|
key: 'abort',
|
|
value: function abort() {
|
|
if (this.streamReader) {
|
|
this.streamReader.abort();
|
|
this.streamReader = null;
|
|
}
|
|
if (this.stream) {
|
|
this.stream.msClose();
|
|
this.stream = null;
|
|
}
|
|
_get(MSStreamBackend.prototype.__proto__ || Object.getPrototypeOf(MSStreamBackend.prototype), 'abort', this).call(this);
|
|
}
|
|
}]);
|
|
|
|
return MSStreamBackend;
|
|
}(Backend);
|
|
|
|
MSStreamBackend.supported = function () {
|
|
try {
|
|
var xhr = new XMLHttpRequest();
|
|
// IE demands that open() be called before we can set xhr.responseType
|
|
xhr.open("GET", "/robots.txt");
|
|
xhr.responseType = type;
|
|
return xhr.responseType === type;
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
};
|
|
|
|
module.exports = MSStreamBackend;
|
|
|
|
|
|
/***/ }),
|
|
/* 29 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
"use strict";
|
|
|
|
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
|
|
|
|
var _get = function get(object, property, receiver) { if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { return get(parent, property, receiver); } } else if ("value" in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } };
|
|
|
|
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
|
|
|
|
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
|
|
|
|
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
|
|
|
|
var DownloadBackend = __webpack_require__(26);
|
|
|
|
var BinaryStringBackend = function (_DownloadBackend) {
|
|
_inherits(BinaryStringBackend, _DownloadBackend);
|
|
|
|
function BinaryStringBackend() {
|
|
_classCallCheck(this, BinaryStringBackend);
|
|
|
|
return _possibleConstructorReturn(this, (BinaryStringBackend.__proto__ || Object.getPrototypeOf(BinaryStringBackend)).apply(this, arguments));
|
|
}
|
|
|
|
_createClass(BinaryStringBackend, [{
|
|
key: "initXHR",
|
|
value: function initXHR() {
|
|
_get(BinaryStringBackend.prototype.__proto__ || Object.getPrototypeOf(BinaryStringBackend.prototype), "initXHR", this).call(this);
|
|
this.xhr.responseType = "text";
|
|
this.xhr.overrideMimeType('text/plain; charset=x-user-defined');
|
|
}
|
|
}, {
|
|
key: "onXHRProgress",
|
|
value: function onXHRProgress() {
|
|
var slice = this.xhr.responseText.slice(this.bytesRead);
|
|
if (slice.length > 0) {
|
|
this.bytesRead += slice.length;
|
|
this.emit('buffer', slice);
|
|
}
|
|
}
|
|
}, {
|
|
key: "onXHRLoad",
|
|
value: function onXHRLoad() {
|
|
// We may or may not get that final event
|
|
this.onXHRProgress();
|
|
_get(BinaryStringBackend.prototype.__proto__ || Object.getPrototypeOf(BinaryStringBackend.prototype), "onXHRLoad", this).call(this);
|
|
}
|
|
}]);
|
|
|
|
return BinaryStringBackend;
|
|
}(DownloadBackend);
|
|
|
|
BinaryStringBackend.supported = function () {
|
|
try {
|
|
var xhr = new XMLHttpRequest();
|
|
return !!xhr.overrideMimeType;
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
};
|
|
|
|
module.exports = BinaryStringBackend;
|
|
|
|
|
|
/***/ }),
|
|
/* 30 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
(function webpackUniversalModuleDefinition(root, factory) {
|
|
if(true)
|
|
module.exports = factory();
|
|
else if(typeof define === 'function' && define.amd)
|
|
define([], factory);
|
|
else if(typeof exports === 'object')
|
|
exports["AudioFeeder"] = factory();
|
|
else
|
|
root["AudioFeeder"] = factory();
|
|
})(this, function() {
|
|
return /******/ (function(modules) { // webpackBootstrap
|
|
/******/ // The module cache
|
|
/******/ var installedModules = {};
|
|
|
|
/******/ // The require function
|
|
/******/ function __webpack_require__(moduleId) {
|
|
|
|
/******/ // Check if module is in cache
|
|
/******/ if(installedModules[moduleId])
|
|
/******/ return installedModules[moduleId].exports;
|
|
|
|
/******/ // Create a new module (and put it into the cache)
|
|
/******/ var module = installedModules[moduleId] = {
|
|
/******/ exports: {},
|
|
/******/ id: moduleId,
|
|
/******/ loaded: false
|
|
/******/ };
|
|
|
|
/******/ // Execute the module function
|
|
/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
|
|
|
|
/******/ // Flag the module as loaded
|
|
/******/ module.loaded = true;
|
|
|
|
/******/ // Return the exports of the module
|
|
/******/ return module.exports;
|
|
/******/ }
|
|
|
|
|
|
/******/ // expose the modules object (__webpack_modules__)
|
|
/******/ __webpack_require__.m = modules;
|
|
|
|
/******/ // expose the module cache
|
|
/******/ __webpack_require__.c = installedModules;
|
|
|
|
/******/ // __webpack_public_path__
|
|
/******/ __webpack_require__.p = "";
|
|
|
|
/******/ // Load entry module and return exports
|
|
/******/ return __webpack_require__(0);
|
|
/******/ })
|
|
/************************************************************************/
|
|
/******/ ([
|
|
/* 0 */
|
|
/***/ function(module, exports, __webpack_require__) {
|
|
|
|
(function() {
|
|
|
|
var BufferQueue = __webpack_require__(1),
|
|
WebAudioBackend = __webpack_require__(2),
|
|
FlashBackend = __webpack_require__(4);
|
|
|
|
|
|
/**
|
|
* Audio sample buffer format passed to {@link AudioFeeder#bufferData} and its backends.
|
|
*
|
|
* Buffers are arrays containing one Float32Array of sample data
|
|
* per channel. Channel counts must match the expected value, and
|
|
* all channels within a buffer must have the same length in samples.
|
|
*
|
|
* Since input data may be stored for a while before being taken
|
|
* back out, be sure that your Float32Arrays for channel data are
|
|
* standalone, not backed on an ArrayBuffer that might change!
|
|
*
|
|
* @typedef {SampleBuffer} SampleBuffer
|
|
* @todo consider replacing this with AudioBuffer-like wrapper object
|
|
*/
|
|
|
|
/**
|
|
* Object dictionary format used to pass options into {@link AudioFeeder} and its backends.
|
|
*
|
|
* @typedef {Object} AudioFeederOptions
|
|
* @property {string} base - (optional) base URL to find additional resources in,
|
|
* such as the Flash audio output shim
|
|
* @property {AudioContext} audioContext - (optional) Web Audio API AudioContext
|
|
* instance to use inplace of creating a default one
|
|
*/
|
|
|
|
/**
|
|
* Object dictionary format returned from {@link AudioFeeder#getPlaybackState} and friends.
|
|
*
|
|
* @typedef {Object} PlaybackState
|
|
* @property {number} playbackPosition - total seconds so far of audio data that have played
|
|
* @property {number} samplesQueued - number of samples at target rate that are queued up for playback
|
|
* @property {number} dropped - number of underrun events, when we had to play silence due to data starvation
|
|
* @property {number} delayedTime - total seconds so far of silent time during playback due to data starvation
|
|
* @todo drop 'dropped' in favor of delayedTime
|
|
* @todo replace sampledQueued with a time unit?
|
|
*/
|
|
|
|
/**
|
|
* Object that we can throw audio data into and have it drain out.
|
|
* @class
|
|
* @param {AudioFeederOptions} options - dictionary of config settings
|
|
*
|
|
* @classdesc
|
|
* Object that we can throw audio data into and have it drain out.
|
|
*/
|
|
function AudioFeeder(options) {
|
|
this._options = options || {};
|
|
this._backend = null; // AudioBackend instance, after init...
|
|
};
|
|
|
|
/**
|
|
* Sample rate in Hz, as requested by the caller in {@link AudioFeeder#init}.
|
|
*
|
|
* If the backend's actual sample rate differs from this requested rate,
|
|
* input data will be resampled automatically.
|
|
*
|
|
* @type {number}
|
|
* @readonly
|
|
* @see AudioFeeder#targetRate
|
|
*/
|
|
AudioFeeder.prototype.rate = 0;
|
|
|
|
/**
|
|
* Actual output sample rate in Hz, as provided by the backend.
|
|
* This may differ from the rate requested, in which case input data
|
|
* will be resampled automatically.
|
|
*
|
|
* @type {number}
|
|
* @readonly
|
|
* @see AudioFeeder#rate
|
|
*/
|
|
AudioFeeder.prototype.targetRate = 0;
|
|
|
|
/**
|
|
* Number of output channels, as requested by the caller in {@link AudioFeeder#init}.
|
|
*
|
|
* If the backend's actual channel count differs from this requested count,
|
|
* input data will be resampled automatically.
|
|
*
|
|
* Warning: currently more than 2 channels may result in additional channels
|
|
* being cropped out, as downmixing has not yet been implemented.
|
|
*
|
|
* @type {number}
|
|
* @readonly
|
|
*/
|
|
AudioFeeder.prototype.channels = 0;
|
|
|
|
/**
|
|
* Size of output buffers in samples, as a hint for latency/scheduling
|
|
* @type {number}
|
|
* @readonly
|
|
*/
|
|
AudioFeeder.prototype.bufferSize = 0;
|
|
|
|
/**
|
|
* Duration of the minimum buffer size, in seconds.
|
|
* If the amount of buffered data falls below this,
|
|
* caller will receive a synchronous 'starved' event
|
|
* with a last chance to buffer more data.
|
|
*
|
|
* @type {number}
|
|
* @readonly
|
|
*/
|
|
Object.defineProperty(AudioFeeder.prototype, 'bufferDuration', {
|
|
get: function getBufferDuration() {
|
|
if (this.targetRate) {
|
|
return this.bufferSize / this.targetRate;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Duration of remaining data at which a 'bufferlow' event will be
|
|
* triggered, in seconds.
|
|
*
|
|
* This defaults to twice bufferDuration, but can be overridden.
|
|
*
|
|
* @type {number}
|
|
*/
|
|
Object.defineProperty(AudioFeeder.prototype, 'bufferThreshold', {
|
|
get: function getBufferThreshold() {
|
|
if (this._backend) {
|
|
return this._backend.bufferThreshold / this.targetRate;
|
|
} else {
|
|
return 0;
|
|
}
|
|
},
|
|
set: function setBufferThreshold(val) {
|
|
if (this._backend) {
|
|
this._backend.bufferThreshold = Math.round(val * this.targetRate);
|
|
} else {
|
|
throw 'Invalid state: AudioFeeder cannot set bufferThreshold before init';
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Current playback position, in seconds.
|
|
* This compensates for drops and underruns, and is suitable for a/v sync.
|
|
*
|
|
* @type {number}
|
|
* @readonly
|
|
*/
|
|
Object.defineProperty(AudioFeeder.prototype, 'playbackPosition', {
|
|
get: function getPlaybackPosition() {
|
|
if (this._backend) {
|
|
var playbackState = this.getPlaybackState();
|
|
return playbackState.playbackPosition;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Duration of remaining queued data, in seconds.
|
|
*
|
|
* @type {number}
|
|
*/
|
|
Object.defineProperty(AudioFeeder.prototype, 'durationBuffered', {
|
|
get: function getDurationBuffered() {
|
|
if (this._backend) {
|
|
var playbackState = this.getPlaybackState();
|
|
return playbackState.samplesQueued / this.targetRate;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Is the feeder currently set to mute output?
|
|
* When muted, this overrides the volume property.
|
|
*
|
|
* @type {boolean}
|
|
*/
|
|
Object.defineProperty(AudioFeeder.prototype, 'muted', {
|
|
get: function getMuted() {
|
|
if (this._backend) {
|
|
return this._backend.muted;
|
|
} else {
|
|
throw 'Invalid state: cannot get mute before init';
|
|
}
|
|
},
|
|
set: function setMuted(val) {
|
|
if (this._backend) {
|
|
this._backend.muted = val;
|
|
} else {
|
|
throw 'Invalid state: cannot set mute before init';
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @deprecated in favor of muted and volume properties
|
|
*/
|
|
AudioFeeder.prototype.mute = function() {
|
|
this.muted = true;
|
|
};
|
|
|
|
/**
|
|
* @deprecated in favor of muted and volume properties
|
|
*/
|
|
AudioFeeder.prototype.unmute = function() {
|
|
this.muted = false;
|
|
};
|
|
|
|
/**
|
|
* Volume multiplier, defaults to 1.0.
|
|
* @name volume
|
|
* @type {number}
|
|
*/
|
|
Object.defineProperty(AudioFeeder.prototype, 'volume', {
|
|
get: function getVolume() {
|
|
if (this._backend) {
|
|
return this._backend.volume;
|
|
} else {
|
|
throw 'Invalid state: cannot get volume before init';
|
|
}
|
|
},
|
|
set: function setVolume(val) {
|
|
if (this._backend) {
|
|
this._backend.volume = val;
|
|
} else {
|
|
throw 'Invalid state: cannot set volume before init';
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Start setting up for output with the given channel count and sample rate.
|
|
* Audio data you provide will be resampled if necessary to whatever the
|
|
* backend actually supports.
|
|
*
|
|
* @param {number} numChannels - requested number of channels (output may differ)
|
|
* @param {number} sampleRate - requested sample rate in Hz (output may differ)
|
|
*
|
|
* @todo merge into constructor?
|
|
*/
|
|
AudioFeeder.prototype.init = function(numChannels, sampleRate) {
|
|
this.channels = numChannels;
|
|
this.rate = sampleRate;
|
|
|
|
if (WebAudioBackend.isSupported()) {
|
|
this._backend = new WebAudioBackend(numChannels, sampleRate, this._options);
|
|
} else if (FlashBackend.isSupported()) {
|
|
this._backend = new FlashBackend(numChannels, sampleRate, this._options);
|
|
} else {
|
|
throw 'No supported backend';
|
|
}
|
|
|
|
this.targetRate = this._backend.rate;
|
|
this.bufferSize = this._backend.bufferSize;
|
|
|
|
// Pass through the starved event
|
|
this._backend.onstarved = (function() {
|
|
if (this.onstarved) {
|
|
this.onstarved();
|
|
}
|
|
}).bind(this);
|
|
this._backend.onbufferlow = (function() {
|
|
if (this.onbufferlow) {
|
|
this.onbufferlow();
|
|
}
|
|
}).bind(this);
|
|
};
|
|
|
|
/**
|
|
* Resample a buffer from the input rate/channel count to the output.
|
|
*
|
|
* This is horribly naive and wrong.
|
|
* Replace me with a better algo!
|
|
*
|
|
* @param {SampleBuffer} sampleData - input data in requested sample rate / channel count
|
|
* @returns {SampleBuffer} output data in backend's sample rate/channel count
|
|
*/
|
|
AudioFeeder.prototype._resample = function(sampleData) {
|
|
var rate = this.rate,
|
|
channels = this.channels,
|
|
targetRate = this._backend.rate,
|
|
targetChannels = this._backend.channels;
|
|
|
|
if (rate == targetRate && channels == targetChannels) {
|
|
return sampleData;
|
|
} else {
|
|
var newSamples = [];
|
|
for (var channel = 0; channel < targetChannels; channel++) {
|
|
var inputChannel = channel;
|
|
if (channel >= channels) {
|
|
// Flash forces output to stereo; if input is mono, dupe the first channel
|
|
inputChannel = 0;
|
|
}
|
|
var input = sampleData[inputChannel],
|
|
output = new Float32Array(Math.round(input.length * targetRate / rate));
|
|
for (var i = 0; i < output.length; i++) {
|
|
output[i] = input[(i * rate / targetRate) | 0];
|
|
}
|
|
newSamples.push(output);
|
|
}
|
|
return newSamples;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Queue up some audio data for playback.
|
|
*
|
|
* @param {SampleBuffer} sampleData - input data to queue up for playback
|
|
*
|
|
* @todo throw if data invalid or uneven
|
|
*/
|
|
AudioFeeder.prototype.bufferData = function(sampleData) {
|
|
if (this._backend) {
|
|
var samples = this._resample(sampleData);
|
|
this._backend.appendBuffer(samples);
|
|
} else {
|
|
throw 'Invalid state: AudioFeeder cannot bufferData before init';
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Get an object with information about the current playback state.
|
|
*
|
|
* @return {PlaybackState} - info about current playback state
|
|
*/
|
|
AudioFeeder.prototype.getPlaybackState = function() {
|
|
if (this._backend) {
|
|
return this._backend.getPlaybackState();
|
|
} else {
|
|
throw 'Invalid state: AudioFeeder cannot getPlaybackState before init';
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Checks if audio system is ready and calls the callback when ready
|
|
* to begin playback.
|
|
*
|
|
* This will wait for the Flash shim to load on IE 10/11; waiting
|
|
* is not required when using native Web Audio but you should use
|
|
* this callback to support older browsers.
|
|
*
|
|
* @param {function} callback - called when ready
|
|
*/
|
|
AudioFeeder.prototype.waitUntilReady = function(callback) {
|
|
if (this._backend) {
|
|
this._backend.waitUntilReady(callback);
|
|
} else {
|
|
throw 'Invalid state: AudioFeeder cannot waitUntilReady before init';
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Start/continue playback as soon as possible.
|
|
*
|
|
* You should buffer some audio ahead of time to avoid immediately
|
|
* running into starvation.
|
|
*/
|
|
AudioFeeder.prototype.start = function() {
|
|
if (this._backend) {
|
|
this._backend.start();
|
|
} else {
|
|
throw 'Invalid state: AudioFeeder cannot start before init';
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Stop/pause playback as soon as possible.
|
|
*
|
|
* Audio that has been buffered but not yet sent to the device will
|
|
* remain buffered, and can be continued with another call to start().
|
|
*/
|
|
AudioFeeder.prototype.stop = function() {
|
|
if (this._backend) {
|
|
this._backend.stop();
|
|
} else {
|
|
throw 'Invalid state: AudioFeeder cannot stop before init';
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Flush any queued data out of the system.
|
|
*/
|
|
AudioFeeder.prototype.flush = function() {
|
|
if (this._backend) {
|
|
this._backend.flush();
|
|
} else {
|
|
throw 'Invalid state: AudioFeeder cannot flush before init';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Close out the audio channel. The AudioFeeder instance will no
|
|
* longer be usable after closing.
|
|
*
|
|
* @todo close out the AudioContext if no longer needed
|
|
* @todo make the instance respond more consistently once closed
|
|
*/
|
|
AudioFeeder.prototype.close = function() {
|
|
if (this._backend) {
|
|
this._backend.close();
|
|
this._backend = null;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Synchronous callback when we find we're out of buffered data.
|
|
*
|
|
* @type {function}
|
|
*/
|
|
AudioFeeder.prototype.onstarved = null;
|
|
|
|
/**
|
|
* Asynchronous callback when we're running low on buffered data.
|
|
*
|
|
* @type {function}
|
|
*/
|
|
AudioFeeder.prototype.onbufferlow = null;
|
|
|
|
/**
|
|
* Is the AudioFeeder class supported in this browser?
|
|
*
|
|
* Note that it's still possible to be supported but not work, for instance
|
|
* if there are no audio output devices but the APIs are available.
|
|
*
|
|
* @returns {boolean} - true if Web Audio API is available
|
|
*/
|
|
AudioFeeder.isSupported = function() {
|
|
return !!Float32Array && (WebAudioBackend.isSupported() || FlashBackend.isSupported());
|
|
};
|
|
|
|
/**
|
|
* Force initialization of the default Web Audio API context, if applicable.
|
|
*
|
|
* Some browsers (such as mobile Safari) disable audio output unless
|
|
* first triggered from a UI event handler; call this method as a hint
|
|
* that you will be starting up an AudioFeeder soon but won't have data
|
|
* for it until a later callback.
|
|
*
|
|
* @returns {AudioContext|null} - initialized AudioContext instance, if applicable
|
|
*/
|
|
AudioFeeder.initSharedAudioContext = function() {
|
|
if (WebAudioBackend.isSupported()) {
|
|
return WebAudioBackend.initSharedAudioContext();
|
|
} else {
|
|
return null;
|
|
}
|
|
};
|
|
|
|
module.exports = AudioFeeder;
|
|
|
|
})();
|
|
|
|
|
|
/***/ },
|
|
/* 1 */
|
|
/***/ function(module, exports) {
|
|
|
|
/**
|
|
* @file Abstraction around a queue of audio buffers.
|
|
*
|
|
* @author Brion Vibber <brion@pobox.com>
|
|
* @copyright (c) 2013-2016 Brion Vibber
|
|
* @license MIT
|
|
*/
|
|
|
|
/**
|
|
* Constructor for BufferQueue class.
|
|
* @class
|
|
* @param {number} numChannels - channel count to validate against
|
|
* @param {number} bufferSize - desired size of pre-chunked output buffers, in samples
|
|
*
|
|
* @classdesc
|
|
* Abstraction around a queue of audio buffers.
|
|
*
|
|
* Stuff input buffers of any length in via {@link BufferQueue#appendBuffer},
|
|
* check how much is queued with {@link BufferQueue#sampleCount}, and pull out
|
|
* data in fixed-size chunks from the start with {@link BufferQueue#shift}.
|
|
*/
|
|
function BufferQueue(numChannels, bufferSize) {
|
|
if (numChannels < 1 || numChannels !== Math.round(numChannels)) {
|
|
throw 'Invalid channel count for BufferQueue';
|
|
}
|
|
this.channels = numChannels;
|
|
this.bufferSize = bufferSize;
|
|
this.flush();
|
|
}
|
|
|
|
/**
|
|
* Flush any data out of the queue, resetting to empty state.
|
|
*/
|
|
BufferQueue.prototype.flush = function() {
|
|
this._buffers = [];
|
|
this._pendingBuffer = this.createBuffer(this.bufferSize);
|
|
this._pendingPos = 0;
|
|
};
|
|
|
|
/**
|
|
* Count how many samples are queued up
|
|
*
|
|
* @returns {number} - total count in samples
|
|
*/
|
|
BufferQueue.prototype.sampleCount = function() {
|
|
var count = 0;
|
|
this._buffers.forEach(function(buffer) {
|
|
count += buffer[0].length;
|
|
});
|
|
return count;
|
|
};
|
|
|
|
/**
|
|
* Create an empty audio sample buffer with space for the given count of samples.
|
|
*
|
|
* @param {number} sampleCount - number of samples to reserve in the buffer
|
|
* @returns {SampleBuffer} - empty buffer
|
|
*/
|
|
BufferQueue.prototype.createBuffer = function(sampleCount) {
|
|
var output = [];
|
|
for (var i = 0; i < this.channels; i++) {
|
|
output[i] = new Float32Array(sampleCount);
|
|
}
|
|
return output;
|
|
};
|
|
|
|
/**
|
|
* Validate a buffer for correct object layout
|
|
*
|
|
* @param {SampleBuffer} buffer - an audio buffer to check
|
|
* @returns {boolean} - true if input buffer is valid
|
|
*/
|
|
BufferQueue.prototype.validate = function(buffer) {
|
|
if (buffer.length !== this.channels) {
|
|
return false;
|
|
}
|
|
|
|
var sampleCount;
|
|
for (var i = 0; i < buffer.length; i++) {
|
|
var channelData = buffer[i];
|
|
if (!(channelData instanceof Float32Array)) {
|
|
return false;
|
|
}
|
|
if (i == 0) {
|
|
sampleCount = channelData.length;
|
|
} else if (channelData.length !== sampleCount) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
};
|
|
|
|
/**
|
|
* Append a buffer of input data to the queue...
|
|
*
|
|
* @param {SampleBuffer} sampleData - an audio buffer to append
|
|
* @throws exception on invalid input
|
|
*/
|
|
BufferQueue.prototype.appendBuffer = function(sampleData) {
|
|
if (!this.validate(sampleData)) {
|
|
throw "Invalid audio buffer passed to BufferQueue.appendBuffer";
|
|
}
|
|
|
|
var firstChannel = sampleData[0],
|
|
sampleCount = firstChannel.length;
|
|
|
|
// @todo this seems hella inefficient
|
|
for (var i = 0; i < sampleCount; i++) {
|
|
for (var channel = 0; channel < this.channels; channel++) {
|
|
this._pendingBuffer[channel][this._pendingPos] = sampleData[channel][i];
|
|
}
|
|
if (++this._pendingPos == this.bufferSize) {
|
|
this._buffers.push(this._pendingBuffer);
|
|
this._pendingPos = 0;
|
|
this._pendingBuffer = this.createBuffer(this.bufferSize);
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
/**
|
|
* Unshift the given sample buffer onto the beginning of the buffer queue.
|
|
*
|
|
* @param {SampleBuffer} sampleData - an audio buffer to prepend
|
|
* @throws exception on invalid input
|
|
*
|
|
* @todo this is currently pretty inefficient as it rechunks all the buffers.
|
|
*/
|
|
BufferQueue.prototype.prependBuffer = function(sampleData) {
|
|
if (!this.validate(sampleData)) {
|
|
throw "Invalid audio buffer passed to BufferQueue.prependBuffer";
|
|
}
|
|
|
|
// Since everything is pre-chunked in the queue, we're going to have
|
|
// to pull everything out and re-append it.
|
|
var buffers = this._buffers.slice(0)
|
|
buffers.push(this.trimBuffer(this._pendingBuffer, 0, this._pendingPos));
|
|
|
|
this.flush();
|
|
this.appendBuffer(sampleData);
|
|
|
|
// Now put back any old buffers, dividing them up into chunks.
|
|
for (var i = 0; i < buffers.length; i++) {
|
|
this.appendBuffer(buffers[i]);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Shift out a buffer from the head of the queue, containing a maximum of
|
|
* {@link BufferQueue#bufferSize} samples; if there are not enough samples
|
|
* you may get a shorter buffer. Call {@link BufferQueue#sampleCount} to
|
|
* check if enough samples are available for your needs.
|
|
*
|
|
* @returns {SampleBuffer} - an audio buffer with zero or more samples
|
|
*/
|
|
BufferQueue.prototype.nextBuffer = function() {
|
|
if (this._buffers.length) {
|
|
return this._buffers.shift();
|
|
} else {
|
|
var trimmed = this.trimBuffer(this._pendingBuffer, 0, this._pendingPos);
|
|
this._pendingBuffer = this.createBuffer(this.bufferSize);
|
|
this._pendingPos = 0;
|
|
return trimmed;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Trim a buffer down to a given maximum sample count.
|
|
* Any additional samples will simply be cropped off of the view.
|
|
* If no trimming is required, the same buffer will be returned.
|
|
*
|
|
* @param {SampleBuffer} sampleData - input data
|
|
* @param {number} start - sample number to start at
|
|
* @param {number} maxSamples - count of samples to crop to
|
|
* @returns {SampleBuffer} - output data with at most maxSamples samples
|
|
*/
|
|
BufferQueue.prototype.trimBuffer = function(sampleData, start, maxSamples) {
|
|
var bufferLength = sampleData[0].length,
|
|
end = start + Math.min(maxSamples, bufferLength);
|
|
if (start == 0 && end >= bufferLength) {
|
|
return sampleData;
|
|
} else {
|
|
var output = [];
|
|
for (var i = 0; i < this.channels; i++) {
|
|
output[i] = sampleData[i].subarray(start, end);
|
|
}
|
|
return output;
|
|
}
|
|
};
|
|
|
|
module.exports = BufferQueue;
|
|
|
|
|
|
/***/ },
|
|
/* 2 */
|
|
/***/ function(module, exports, __webpack_require__) {
|
|
|
|
/**
|
|
* @file Web Audio API backend for AudioFeeder
|
|
* @author Brion Vibber <brion@pobox.com>
|
|
* @copyright (c) 2013-2016 Brion Vibber
|
|
* @license MIT
|
|
*/
|
|
|
|
(function() {
|
|
|
|
var AudioContext = window.AudioContext || window.webkitAudioContext,
|
|
BufferQueue = __webpack_require__(1),
|
|
nextTick = __webpack_require__(3);
|
|
|
|
/**
|
|
* Constructor for AudioFeeder's Web Audio API backend.
|
|
* @class
|
|
* @param {number} numChannels - requested count of output channels
|
|
* @param {number} sampleRate - requested sample rate for output
|
|
* @param {Object} options - pass URL path to directory containing 'dynamicaudio.swf' in 'base' parameter
|
|
*
|
|
* @classdesc Web Audio API output backend for AudioFeeder.
|
|
* Maintains an internal {@link BufferQueue} of audio samples to be output on demand.
|
|
*/
|
|
function WebAudioBackend(numChannels, sampleRate, options) {
|
|
var context = options.audioContext || WebAudioBackend.initSharedAudioContext();
|
|
|
|
this._context = context;
|
|
|
|
|
|
/*
|
|
* Optional audio node can be provided to connect the feeder to
|
|
* @type {AudioNode}
|
|
*/
|
|
this.output = options.output || context.destination
|
|
|
|
/**
|
|
* Actual sample rate supported for output, in Hz
|
|
* @type {number}
|
|
* @readonly
|
|
*/
|
|
this.rate = context.sampleRate;
|
|
|
|
/**
|
|
* Actual count of channels supported for output
|
|
* @type {number}
|
|
* @readonly
|
|
*/
|
|
this.channels = Math.min(numChannels, 2); // @fixme remove this limit
|
|
|
|
if (options.bufferSize) {
|
|
this.bufferSize = (options.bufferSize | 0);
|
|
}
|
|
this.bufferThreshold = 2 * this.bufferSize;
|
|
|
|
this._bufferQueue = new BufferQueue(this.channels, this.bufferSize);
|
|
this._playbackTimeAtBufferTail = context.currentTime;
|
|
this._queuedTime = 0;
|
|
this._delayedTime = 0;
|
|
this._dropped = 0;
|
|
this._liveBuffer = this._bufferQueue.createBuffer(this.bufferSize);
|
|
|
|
// @todo support new audio worker mode too
|
|
if (context.createScriptProcessor) {
|
|
this._node = context.createScriptProcessor(this.bufferSize, 0, this.channels);
|
|
} else if (context.createJavaScriptNode) {
|
|
// In older Safari versions
|
|
this._node = context.createJavaScriptNode(this.bufferSize, 0, this.channels);
|
|
} else {
|
|
throw new Error("Bad version of web audio API?");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Size of output buffers in samples, as a hint for latency/scheduling
|
|
* @type {number}
|
|
* @readonly
|
|
*/
|
|
WebAudioBackend.prototype.bufferSize = 4096;
|
|
|
|
/**
|
|
* Remaining sample count at which a 'bufferlow' event will be triggered.
|
|
*
|
|
* Will be pinged when falling below bufferThreshold or bufferSize,
|
|
* whichever is larger.
|
|
*
|
|
* @type {number}
|
|
*/
|
|
WebAudioBackend.prototype.bufferThreshold = 8192;
|
|
|
|
/**
|
|
* Internal volume property backing.
|
|
* @type {number}
|
|
* @access private
|
|
*/
|
|
WebAudioBackend.prototype._volume = 1;
|
|
|
|
/**
|
|
* Volume multiplier, defaults to 1.0.
|
|
* @name volume
|
|
* @type {number}
|
|
*/
|
|
Object.defineProperty(WebAudioBackend.prototype, 'volume', {
|
|
get: function getVolume() {
|
|
return this._volume;
|
|
},
|
|
set: function setVolume(val) {
|
|
this._volume = +val;
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Internal muted property backing.
|
|
* @type {number}
|
|
* @access private
|
|
*/
|
|
WebAudioBackend.prototype._muted = false;
|
|
|
|
/**
|
|
* Is the backend currently set to mute output?
|
|
* When muted, this overrides the volume property.
|
|
*
|
|
* @type {boolean}
|
|
*/
|
|
Object.defineProperty(WebAudioBackend.prototype, 'muted', {
|
|
get: function getMuted() {
|
|
return this._muted;
|
|
},
|
|
set: function setMuted(val) {
|
|
this._muted = !!val;
|
|
}
|
|
});
|
|
|
|
/**
|
|
* onaudioprocess event handler for the ScriptProcessorNode
|
|
* @param {AudioProcessingEvent} event - audio processing event object
|
|
* @access private
|
|
*/
|
|
WebAudioBackend.prototype._audioProcess = function(event) {
|
|
var channel, input, output, i, playbackTime;
|
|
if (typeof event.playbackTime === 'number') {
|
|
playbackTime = event.playbackTime;
|
|
} else {
|
|
// Safari 6.1 hack
|
|
playbackTime = this._context.currentTime + (this.bufferSize / this.rate);
|
|
}
|
|
|
|
var expectedTime = this._playbackTimeAtBufferTail;
|
|
if (expectedTime < playbackTime) {
|
|
// we may have lost some time while something ran too slow
|
|
this._delayedTime += (playbackTime - expectedTime);
|
|
}
|
|
|
|
if (this._bufferQueue.sampleCount() < this.bufferSize) {
|
|
// We might be in a throttled background tab; go ping the decoder
|
|
// and let it know we need more data now!
|
|
// @todo use standard event firing?
|
|
if (this.onstarved) {
|
|
this.onstarved();
|
|
}
|
|
}
|
|
|
|
// If we still haven't got enough data, write a buffer of silence
|
|
// to all channels and record an underrun event.
|
|
// @todo go ahead and output the data we _do_ have?
|
|
if (this._bufferQueue.sampleCount() < this.bufferSize) {
|
|
for (channel = 0; channel < this.channels; channel++) {
|
|
output = event.outputBuffer.getChannelData(channel);
|
|
for (i = 0; i < this.bufferSize; i++) {
|
|
output[i] = 0;
|
|
}
|
|
}
|
|
this._dropped++;
|
|
return;
|
|
}
|
|
|
|
var volume = (this.muted ? 0 : this.volume);
|
|
|
|
// Actually get that data and write it out...
|
|
var inputBuffer = this._bufferQueue.nextBuffer();
|
|
if (inputBuffer[0].length < this.bufferSize) {
|
|
// This should not happen, but trust no invariants!
|
|
throw 'Audio buffer not expected length.';
|
|
}
|
|
for (channel = 0; channel < this.channels; channel++) {
|
|
input = inputBuffer[channel];
|
|
|
|
// Save this buffer data for later in case we pause
|
|
this._liveBuffer[channel].set(inputBuffer[channel]);
|
|
|
|
// And play it out with volume applied...
|
|
output = event.outputBuffer.getChannelData(channel);
|
|
for (i = 0; i < input.length; i++) {
|
|
output[i] = input[i] * volume;
|
|
}
|
|
}
|
|
this._queuedTime += (this.bufferSize / this.rate);
|
|
this._playbackTimeAtBufferTail = playbackTime + (this.bufferSize / this.rate);
|
|
|
|
if (this._bufferQueue.sampleCount() < Math.max(this.bufferSize, this.bufferThreshold)) {
|
|
// Let the decoder know ahead of time we're running low on data.
|
|
// @todo use standard event firing?
|
|
if (this.onbufferlow) {
|
|
nextTick(this.onbufferlow.bind(this));
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* Return a count of samples that have been queued or output but not yet played.
|
|
*
|
|
* @returns {number} - sample count
|
|
* @access private
|
|
*/
|
|
WebAudioBackend.prototype._samplesQueued = function() {
|
|
var bufferedSamples = this._bufferQueue.sampleCount();
|
|
var remainingSamples = Math.floor(this._timeAwaitingPlayback() * this.rate);
|
|
|
|
return bufferedSamples + remainingSamples;
|
|
};
|
|
|
|
/**
|
|
* Return time duration between the present and the endpoint of audio
|
|
* we have already sent out from our queue to Web Audio.
|
|
*
|
|
* @returns {number} - seconds
|
|
*/
|
|
WebAudioBackend.prototype._timeAwaitingPlayback = function() {
|
|
return Math.max(0, this._playbackTimeAtBufferTail - this._context.currentTime);
|
|
};
|
|
|
|
/**
|
|
* Get info about current playback state.
|
|
*
|
|
* @return {PlaybackState} - info about current playback state
|
|
*/
|
|
WebAudioBackend.prototype.getPlaybackState = function() {
|
|
return {
|
|
playbackPosition: this._queuedTime - this._timeAwaitingPlayback(),
|
|
samplesQueued: this._samplesQueued(),
|
|
dropped: this._dropped,
|
|
delayed: this._delayedTime
|
|
};
|
|
};
|
|
|
|
/**
|
|
* Wait asynchronously until the backend is ready before continuing.
|
|
*
|
|
* This will always call immediately for the Web Audio API backend,
|
|
* as there is no async setup process.
|
|
*
|
|
* @param {function} callback - to be called when ready
|
|
*/
|
|
WebAudioBackend.prototype.waitUntilReady = function(callback) {
|
|
callback();
|
|
};
|
|
|
|
/**
|
|
* Append a buffer of audio data to the output queue for playback.
|
|
*
|
|
* Audio data must be at the expected sample rate; resampling is done
|
|
* upstream in {@link AudioFeeder}.
|
|
*
|
|
* @param {SampleBuffer} sampleData - audio data at target sample rate
|
|
*/
|
|
WebAudioBackend.prototype.appendBuffer = function(sampleData) {
|
|
this._bufferQueue.appendBuffer(sampleData);
|
|
};
|
|
|
|
/**
|
|
* Start playback.
|
|
*
|
|
* Audio should have already been queued at this point,
|
|
* or starvation may occur immediately.
|
|
*/
|
|
WebAudioBackend.prototype.start = function() {
|
|
this._node.onaudioprocess = this._audioProcess.bind(this);
|
|
this._node.connect(this.output);
|
|
this._playbackTimeAtBufferTail = this._context.currentTime;
|
|
};
|
|
|
|
/**
|
|
* Stop playback, but don't release resources or clear the buffers.
|
|
* We'll probably come back soon.
|
|
*/
|
|
WebAudioBackend.prototype.stop = function() {
|
|
if (this._node) {
|
|
var timeRemaining = this._timeAwaitingPlayback();
|
|
if (timeRemaining > 0) {
|
|
// We have some leftover samples that got queued but didn't get played.
|
|
// Unshift them back onto the beginning of the buffer.
|
|
// @todo make this not a horrible hack
|
|
var samplesRemaining = Math.round(timeRemaining * this.rate),
|
|
samplesAvailable = this._liveBuffer ? this._liveBuffer[0].length : 0;
|
|
if (samplesRemaining > samplesAvailable) {
|
|
//console.log('liveBuffer size ' + samplesRemaining + ' vs ' + samplesAvailable);
|
|
this._bufferQueue.prependBuffer(this._liveBuffer);
|
|
this._bufferQueue.prependBuffer(
|
|
this._bufferQueue.createBuffer(samplesRemaining - samplesAvailable));
|
|
} else {
|
|
this._bufferQueue.prependBuffer(
|
|
this._bufferQueue.trimBuffer(this._liveBuffer, samplesAvailable - samplesRemaining, samplesRemaining));
|
|
}
|
|
this._playbackTimeAtBufferTail -= timeRemaining;
|
|
}
|
|
this._node.onaudioprocess = null;
|
|
this._node.disconnect();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Flush any queued data out of the system.
|
|
*/
|
|
WebAudioBackend.prototype.flush = function() {
|
|
this._bufferQueue.flush();
|
|
};
|
|
|
|
/**
|
|
* Close out the playback system and release resources.
|
|
*
|
|
* @todo consider releasing the AudioContext when possible
|
|
*/
|
|
WebAudioBackend.prototype.close = function() {
|
|
this.stop();
|
|
|
|
this._context = null;
|
|
};
|
|
|
|
/**
|
|
* Synchronous callback for when we run out of input data
|
|
*
|
|
* @type function|null
|
|
*/
|
|
WebAudioBackend.prototype.onstarved = null;
|
|
|
|
/**
|
|
* Asynchronous callback for when the buffer runs low and
|
|
* should be refilled soon.
|
|
*
|
|
* @type function|null
|
|
*/
|
|
WebAudioBackend.prototype.onbufferlow = null;
|
|
|
|
/**
|
|
* Check if Web Audio API appears to be supported.
|
|
*
|
|
* Note this is somewhat optimistic; will return true even if there are no
|
|
* audio devices available, as long as the API is present.
|
|
*
|
|
* @returns {boolean} - true if this browser appears to support Web Audio API
|
|
*/
|
|
WebAudioBackend.isSupported = function() {
|
|
return !!AudioContext;
|
|
};
|
|
|
|
/**
|
|
* Holder of audio context to be used/reused by WebAudioBackend.
|
|
* @see {WebAudioBackend#initSharedAudioContext}
|
|
*
|
|
* @type {AudioContext}
|
|
*/
|
|
WebAudioBackend.sharedAudioContext = null;
|
|
|
|
/**
|
|
* Force initialization of the default Web Audio API context.
|
|
*
|
|
* Some browsers (such as mobile Safari) disable audio output unless
|
|
* first triggered from a UI event handler; call this method as a hint
|
|
* that you will be starting up an AudioFeeder soon but won't have data
|
|
* for it until a later callback.
|
|
*
|
|
* @returns {AudioContext|null} - initialized AudioContext instance, if applicable
|
|
*/
|
|
WebAudioBackend.initSharedAudioContext = function() {
|
|
if (!WebAudioBackend.sharedAudioContext) {
|
|
if (WebAudioBackend.isSupported()) {
|
|
// We're only allowed 4 contexts on many browsers
|
|
// and there's no way to discard them (!)...
|
|
var context = new AudioContext(),
|
|
node;
|
|
if (context.createScriptProcessor) {
|
|
node = context.createScriptProcessor(1024, 0, 2);
|
|
} else if (context.createJavaScriptNode) {
|
|
node = context.createJavaScriptNode(1024, 0, 2);
|
|
} else {
|
|
throw new Error( "Bad version of web audio API?" );
|
|
}
|
|
|
|
// Don't actually run any audio, just start & stop the node
|
|
node.connect(context.destination);
|
|
node.disconnect();
|
|
|
|
// So far so good. Keep it around!
|
|
WebAudioBackend.sharedAudioContext = context;
|
|
}
|
|
}
|
|
return WebAudioBackend.sharedAudioContext;
|
|
};
|
|
|
|
module.exports = WebAudioBackend;
|
|
|
|
})();
|
|
|
|
|
|
/***/ },
|
|
/* 3 */
|
|
/***/ function(module, exports) {
|
|
|
|
module.exports = (function() {
|
|
// Don't try to check for setImmediate directly; webpack implements
|
|
// it using setTimeout which will be throttled in background tabs.
|
|
// Checking directly on the global window object skips this interference.
|
|
if (typeof window.setImmediate !== 'undefined') {
|
|
return window.setImmediate;
|
|
}
|
|
|
|
// window.postMessage goes straight to the event loop, no throttling.
|
|
if (window && window.postMessage) {
|
|
var nextTickQueue = [];
|
|
window.addEventListener('message', function(event) {
|
|
if (event.source === window) {
|
|
var data = event.data;
|
|
if (typeof data === 'object' && data.nextTickBrowserPingMessage) {
|
|
var callback = nextTickQueue.pop();
|
|
if (callback) {
|
|
callback();
|
|
}
|
|
}
|
|
}
|
|
});
|
|
return function(callback) {
|
|
nextTickQueue.push(callback);
|
|
window.postMessage({
|
|
nextTickBrowserPingMessage: true
|
|
}, document.location.toString())
|
|
};
|
|
}
|
|
|
|
// Timeout fallback may be poor in background tabs
|
|
return function(callback) {
|
|
setTimeout(callback, 0);
|
|
}
|
|
})();
|
|
|
|
|
|
/***/ },
|
|
/* 4 */
|
|
/***/ function(module, exports, __webpack_require__) {
|
|
|
|
(function() {
|
|
|
|
/* global ActiveXObject */
|
|
var dynamicaudio_swf = __webpack_require__(5);
|
|
|
|
var nextTick = __webpack_require__(3);
|
|
|
|
/**
|
|
* Constructor for AudioFeeder's Flash audio backend.
|
|
* @class
|
|
* @param {number} numChannels - requested count of output channels (actual will be fixed at 2)
|
|
* @param {number} sampleRate - requested sample rate for output (actual will be fixed at 44.1 kHz)
|
|
* @param {Object} options - pass URL path to directory containing 'dynamicaudio.swf' in 'base' parameter
|
|
*
|
|
* @classdesc Flash audio output backend for AudioFeeder.
|
|
* Maintains a local queue of data to be sent down to the Flash shim.
|
|
* Resampling to stereo 44.1 kHz is done upstream in AudioFeeder.
|
|
*/
|
|
var FlashBackend = function(numChannels, sampleRate, options) {
|
|
options = options || {};
|
|
var flashOptions = {};
|
|
if (typeof options.base === 'string') {
|
|
// @fixme replace the version string with an auto-updateable one
|
|
flashOptions.swf = options.base + '/' + dynamicaudio_swf;
|
|
}
|
|
if (options.bufferSize) {
|
|
this.bufferSize = (options.bufferSize | 0);
|
|
}
|
|
|
|
this._flashaudio = new DynamicAudio(flashOptions);
|
|
this._flashBuffer = '';
|
|
this._flushTimeout = null;
|
|
this._flushInterval = 40; // flush added buffers no more often than every X ms
|
|
this._cachedFlashState = null;
|
|
this._cachedFlashTime = 0;
|
|
this._cachedFlashInterval = 40; // resync state no more often than every X ms
|
|
|
|
this._waitUntilReadyQueue = [];
|
|
this.onready = function() {
|
|
this._flashaudio.flashElement.setBufferSize(this.bufferSize);
|
|
this._flashaudio.flashElement.setBufferThreshold(this.bufferThreshold);
|
|
while (this._waitUntilReadyQueue.length) {
|
|
var callback = this._waitUntilReadyQueue.shift();
|
|
callback.apply(this);
|
|
}
|
|
};
|
|
this.onlog = function(msg) {
|
|
console.log('AudioFeeder FlashBackend: ' + msg);
|
|
}
|
|
|
|
this.bufferThreshold = this.bufferSize * 2;
|
|
|
|
var events = {
|
|
'ready': 'sync',
|
|
'log': 'sync',
|
|
'starved': 'sync',
|
|
'bufferlow': 'async'
|
|
};
|
|
this._callbackName = 'AudioFeederFlashBackendCallback' + this._flashaudio.id;
|
|
var self = this;
|
|
window[this._callbackName] = (function(eventName) {
|
|
var method = events[eventName],
|
|
callback = this['on' + eventName];
|
|
if (method && callback) {
|
|
if (method === 'async') {
|
|
nextTick(callback.bind(this));
|
|
} else {
|
|
callback.apply(this, Array.prototype.slice.call(arguments, 1));
|
|
this._flushFlashBuffer();
|
|
}
|
|
}
|
|
}).bind(this);
|
|
};
|
|
|
|
/**
|
|
* Actual sample rate supported for output, in Hz
|
|
* Fixed to 44.1 kHz for Flash backend.
|
|
* @type {number}
|
|
* @readonly
|
|
*/
|
|
FlashBackend.prototype.rate = 44100;
|
|
|
|
/**
|
|
* Actual count of channels supported for output
|
|
* Fixed to stereo for Flash backend.
|
|
* @type {number}
|
|
* @readonly
|
|
*/
|
|
FlashBackend.prototype.channels = 2;
|
|
|
|
/**
|
|
* Buffer size hint.
|
|
* @type {number}
|
|
* @readonly
|
|
*/
|
|
FlashBackend.prototype.bufferSize = 4096;
|
|
|
|
/**
|
|
* Internal bufferThreshold property backing.
|
|
* @type {number}
|
|
* @access private
|
|
*/
|
|
FlashBackend.prototype._bufferThreshold = 8192;
|
|
|
|
/**
|
|
* Remaining sample count at which a 'bufferlow' event will be triggered.
|
|
*
|
|
* Will be pinged when falling below bufferThreshold or bufferSize,
|
|
* whichever is larger.
|
|
*
|
|
* @type {number}
|
|
*/
|
|
Object.defineProperty(FlashBackend.prototype, 'bufferThreshold', {
|
|
get: function getBufferThreshold() {
|
|
return this._bufferThreshold;
|
|
},
|
|
set: function setBufferThreshold(val) {
|
|
this._bufferThreshold = val | 0;
|
|
this.waitUntilReady((function() {
|
|
this._flashaudio.flashElement.setBufferThreshold(this._bufferThreshold);
|
|
}).bind(this));
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Internal volume property backing.
|
|
* @type {number}
|
|
* @access private
|
|
*/
|
|
FlashBackend.prototype._volume = 1;
|
|
|
|
/**
|
|
* Volume multiplier, defaults to 1.0.
|
|
* @name volume
|
|
* @type {number}
|
|
*/
|
|
Object.defineProperty(FlashBackend.prototype, 'volume', {
|
|
get: function getVolume() {
|
|
return this._volume;
|
|
},
|
|
set: function setVolume(val) {
|
|
this._volume = +val;
|
|
this.waitUntilReady(this._flashVolumeUpdate.bind(this));
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Internal muted property backing.
|
|
* @type {number}
|
|
* @access private
|
|
*/
|
|
FlashBackend.prototype._muted = false;
|
|
|
|
/**
|
|
* Is the backend currently set to mute output?
|
|
* When muted, this overrides the volume property.
|
|
*
|
|
* @type {boolean}
|
|
*/
|
|
Object.defineProperty(FlashBackend.prototype, 'muted', {
|
|
get: function getMuted() {
|
|
return this._muted;
|
|
},
|
|
set: function setMuted(val) {
|
|
this._muted = !!val;
|
|
this.waitUntilReady(this._flashVolumeUpdate.bind(this));
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Are we paused/idle?
|
|
* @type {boolean}
|
|
* @access private
|
|
*/
|
|
FlashBackend.prototype._paused = true;
|
|
|
|
/**
|
|
* Pass the currently configured muted+volume state down to the Flash plugin
|
|
* @access private
|
|
*/
|
|
FlashBackend.prototype._flashVolumeUpdate = function() {
|
|
if (this._flashaudio && this._flashaudio.flashElement && this._flashaudio.flashElement.setVolume) {
|
|
this._flashaudio.flashElement.setVolume(this.muted ? 0 : this.volume);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Scaling and reordering of output for the Flash fallback.
|
|
* Input data must be pre-resampled to the correct sample rate.
|
|
*
|
|
* @param {SampleBuffer} samples - input data as separate channels of 32-bit float
|
|
* @returns {Int16Array} - interleaved stereo 16-bit signed integer output
|
|
* @access private
|
|
*
|
|
* @todo handle input with higher channel counts better
|
|
* @todo try sending floats to flash without losing precision?
|
|
*/
|
|
FlashBackend.prototype._resampleFlash = function(samples) {
|
|
var sampleincr = 1;
|
|
var samplecount = samples[0].length;
|
|
var newSamples = new Int16Array(samplecount * 2);
|
|
var chanLeft = samples[0];
|
|
var chanRight = this.channels > 1 ? samples[1] : chanLeft;
|
|
var volume = this.muted ? 0 : this.volume;
|
|
var multiplier = volume * 16384; // smaller than 32768 to allow some headroom from those floats
|
|
for(var s = 0; s < samplecount; s++) {
|
|
var idx = (s * sampleincr) | 0;
|
|
var idx_out = s * 2;
|
|
// Use a smaller
|
|
newSamples[idx_out] = chanLeft[idx] * multiplier;
|
|
newSamples[idx_out + 1] = chanRight[idx] * multiplier;
|
|
}
|
|
return newSamples;
|
|
};
|
|
|
|
var hexDigits = ['0', '1', '2', '3', '4', '5', '6', '7',
|
|
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f'];
|
|
var hexBytes = [];
|
|
for (var i = 0; i < 256; i++) {
|
|
hexBytes[i] = hexDigits[(i & 0x0f)] +
|
|
hexDigits[(i & 0xf0) >> 4];
|
|
}
|
|
function hexString(buffer) {
|
|
var samples = new Uint8Array(buffer);
|
|
var digits = "",
|
|
len = samples.length;
|
|
for (var i = 0; i < len; i++) {
|
|
// Note that in IE 11 string concatenation is twice as fast as
|
|
// the traditional make-an-array-and-join here.
|
|
digits += hexBytes[samples[i]];
|
|
}
|
|
return digits;
|
|
}
|
|
|
|
/**
|
|
* Send any pending data off to the Flash plugin.
|
|
*
|
|
* @access private
|
|
*/
|
|
FlashBackend.prototype._flushFlashBuffer = function() {
|
|
var chunk = this._flashBuffer,
|
|
flashElement = this._flashaudio.flashElement;
|
|
|
|
if (this._cachedFlashState) {
|
|
this._cachedFlashState.samplesQueued += chunk.length / 8;
|
|
}
|
|
this._flashBuffer = '';
|
|
this._flushTimeout = null;
|
|
|
|
if (chunk.length > 0) {
|
|
this.waitUntilReady(function() {
|
|
flashElement.write(chunk);
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Append a buffer of audio data to the output queue for playback.
|
|
*
|
|
* Audio data must be at the expected sample rate; resampling is done
|
|
* upstream in {@link AudioFeeder}.
|
|
*
|
|
* @param {SampleBuffer} sampleData - audio data at target sample rate
|
|
*/
|
|
FlashBackend.prototype.appendBuffer = function(sampleData) {
|
|
var resamples = this._resampleFlash(sampleData);
|
|
if (resamples.length > 0) {
|
|
var str = hexString(resamples.buffer);
|
|
this._flashBuffer += str;
|
|
if (!this._flushTimeout) {
|
|
// consolidate multiple consecutive tiny buffers in one pass;
|
|
// pushing data to Flash is relatively expensive on slow machines
|
|
this._flushTimeout = setTimeout(this._flushFlashBuffer.bind(this), this._flushInterval);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Get info about current playback state.
|
|
*
|
|
* @return {PlaybackState} - info about current playback state
|
|
*/
|
|
FlashBackend.prototype.getPlaybackState = function() {
|
|
if (this._flashaudio && this._flashaudio.flashElement && this._flashaudio.flashElement.write) {
|
|
var now = Date.now(),
|
|
delta = this._paused ? 0 : (now - this._cachedFlashTime),
|
|
state;
|
|
if (this._cachedFlashState && delta < this._cachedFlashInterval) {
|
|
var cachedFlashState = this._cachedFlashState;
|
|
state = {
|
|
playbackPosition: cachedFlashState.playbackPosition + delta / 1000,
|
|
samplesQueued: cachedFlashState.samplesQueued -
|
|
Math.max(0, Math.round(delta * this.rate / 1000)),
|
|
dropped: cachedFlashState.dropped,
|
|
delayed: cachedFlashState.delayed
|
|
};
|
|
} else {
|
|
state = this._flashaudio.flashElement.getPlaybackState();
|
|
this._cachedFlashState = state;
|
|
this._cachedFlashTime = now;
|
|
}
|
|
state.samplesQueued += this._flashBuffer.length / 8;
|
|
return state;
|
|
} else {
|
|
//console.log('getPlaybackState USED TOO EARLY');
|
|
return {
|
|
playbackPosition: 0,
|
|
samplesQueued: 0,
|
|
dropped: 0,
|
|
delayed: 0
|
|
};
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Wait until the backend is ready to start, then call the callback.
|
|
*
|
|
* @param {function} callback - called on completion
|
|
* @todo handle fail case better?
|
|
*/
|
|
FlashBackend.prototype.waitUntilReady = function(callback) {
|
|
if (this._flashaudio && this._flashaudio.flashElement.write) {
|
|
callback.apply(this);
|
|
} else {
|
|
this._waitUntilReadyQueue.push(callback);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Start playback.
|
|
*
|
|
* Audio should have already been queued at this point,
|
|
* or starvation may occur immediately.
|
|
*/
|
|
FlashBackend.prototype.start = function() {
|
|
this._flashaudio.flashElement.start();
|
|
this._paused = false;
|
|
this._cachedFlashState = null;
|
|
};
|
|
|
|
/**
|
|
* Stop playback, but don't release resources or clear the buffers.
|
|
* We'll probably come back soon.
|
|
*/
|
|
FlashBackend.prototype.stop = function() {
|
|
this._flashaudio.flashElement.stop();
|
|
this._paused = true;
|
|
this._cachedFlashState = null;
|
|
};
|
|
|
|
/**
|
|
* Flush any queued data out of the system.
|
|
*/
|
|
FlashBackend.prototype.flush = function() {
|
|
this._flashaudio.flashElement.flush();
|
|
this._cachedFlashState = null;
|
|
};
|
|
|
|
/**
|
|
* Close out the playback system and release resources.
|
|
*/
|
|
FlashBackend.prototype.close = function() {
|
|
this.stop();
|
|
|
|
var wrapper = this._flashaudio.flashWrapper;
|
|
wrapper.parentNode.removeChild(wrapper);
|
|
this._flashaudio = null;
|
|
delete window[this._callbackName];
|
|
};
|
|
|
|
/**
|
|
* Synchronous callback for when we run out of input data
|
|
*
|
|
* @type function|null
|
|
*/
|
|
FlashBackend.prototype.onstarved = null;
|
|
|
|
/**
|
|
* Asynchronous callback for when the buffer runs low and
|
|
* should be refilled soon.
|
|
*
|
|
* @type function|null
|
|
*/
|
|
FlashBackend.prototype.onbufferlow = null;
|
|
|
|
/**
|
|
* Check if the browser appears to support Flash.
|
|
*
|
|
* Note this is somewhat optimistic, in that Flash may be supported
|
|
* but the dynamicaudio.swf file might not load, or it might load
|
|
* but there might be no audio devices, etc.
|
|
*
|
|
* Currently only checks for the ActiveX Flash plugin for Internet Explorer,
|
|
* as other target browsers support Web Audio API.
|
|
*
|
|
* @returns {boolean} - true if this browser appears to support Flash
|
|
*/
|
|
FlashBackend.isSupported = function() {
|
|
if (navigator.userAgent.indexOf('Trident') !== -1) {
|
|
// We only do the ActiveX test because we only need Flash in
|
|
// Internet Explorer 10/11. Other browsers use Web Audio directly
|
|
// (Edge, Safari) or native playback, so there's no need to test
|
|
// other ways of loading Flash.
|
|
try {
|
|
var obj = new ActiveXObject('ShockwaveFlash.ShockwaveFlash');
|
|
return true;
|
|
} catch(e) {
|
|
return false;
|
|
}
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/** Flash fallback **/
|
|
|
|
/*
|
|
The Flash fallback is based on https://github.com/an146/dynamicaudio.js
|
|
|
|
This is the contents of the LICENSE file:
|
|
|
|
Copyright (c) 2010, Ben Firshman
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright notice, this
|
|
list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright notice,
|
|
this list of conditions and the following disclaimer in the documentation
|
|
and/or other materials provided with the distribution.
|
|
* The names of its contributors may not be used to endorse or promote products
|
|
derived from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
|
|
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
|
|
/**
|
|
* Wrapper class for instantiating Flash plugin.
|
|
*
|
|
* @constructor
|
|
* @param {Object} args - pass 'swf' to override default dynamicaudio.swf URL
|
|
* @access private
|
|
*/
|
|
function DynamicAudio(args) {
|
|
if (this instanceof arguments.callee) {
|
|
if (typeof this.init === "function") {
|
|
this.init.apply(this, (args && args.callee) ? args : arguments);
|
|
}
|
|
} else {
|
|
return new arguments.callee(arguments);
|
|
}
|
|
}
|
|
|
|
|
|
DynamicAudio.nextId = 1;
|
|
|
|
DynamicAudio.prototype = {
|
|
nextId: null,
|
|
swf: dynamicaudio_swf,
|
|
|
|
flashWrapper: null,
|
|
flashElement: null,
|
|
|
|
init: function(opts) {
|
|
var self = this;
|
|
self.id = DynamicAudio.nextId++;
|
|
|
|
if (opts && typeof opts.swf !== 'undefined') {
|
|
self.swf = opts.swf;
|
|
}
|
|
|
|
|
|
self.flashWrapper = document.createElement('div');
|
|
self.flashWrapper.id = 'dynamicaudio-flashwrapper-'+self.id;
|
|
// Credit to SoundManager2 for this:
|
|
var s = self.flashWrapper.style;
|
|
s.position = 'fixed';
|
|
s.width = '11px'; // must be at least 6px for flash to run fast
|
|
s.height = '11px';
|
|
s.bottom = s.left = '0px';
|
|
s.overflow = 'hidden';
|
|
self.flashElement = document.createElement('div');
|
|
self.flashElement.id = 'dynamicaudio-flashelement-'+self.id;
|
|
self.flashWrapper.appendChild(self.flashElement);
|
|
|
|
document.body.appendChild(self.flashWrapper);
|
|
|
|
var id = self.flashElement.id;
|
|
var params = '<param name="FlashVars" value="objectId=' + self.id + '">';
|
|
|
|
self.flashWrapper.innerHTML = "<object id='"+id+"' width='10' height='10' type='application/x-shockwave-flash' data='"+self.swf+"' style='visibility: visible;'><param name='allowscriptaccess' value='always'>" + params + "</object>";
|
|
self.flashElement = document.getElementById(id);
|
|
},
|
|
};
|
|
|
|
module.exports = FlashBackend;
|
|
|
|
})();
|
|
|
|
|
|
/***/ },
|
|
/* 5 */
|
|
/***/ function(module, exports, __webpack_require__) {
|
|
|
|
module.exports = __webpack_require__.p + "dynamicaudio.swf?version=0f98a83acdc72cf30968c16a018e1cf1";
|
|
|
|
/***/ }
|
|
/******/ ])
|
|
});
|
|
;
|
|
|
|
/***/ }),
|
|
/* 31 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
module.exports = __webpack_require__.p + "dynamicaudio.swf?version=0f98a83acdc72cf30968c16a018e1cf1";
|
|
|
|
/***/ }),
|
|
/* 32 */
|
|
/***/ (function(module, exports) {
|
|
|
|
/**
|
|
* Give as your 'process' function something that will trigger an async
|
|
* operation, then call the left() or right() methods to run another
|
|
* iteration, bisecting to the given direction.
|
|
*
|
|
* Caller is responsible for determining when done.
|
|
*
|
|
* @params options object {
|
|
* start: number,
|
|
* end: number,
|
|
* process: function(start, position, end)
|
|
* }
|
|
*/
|
|
function Bisector(options) {
|
|
var start = options.start,
|
|
end = options.end,
|
|
position = 0,
|
|
self = this,
|
|
n = 0;
|
|
|
|
function iterate() {
|
|
n++;
|
|
position = Math.floor((start + end) / 2);
|
|
return options.process(start, end, position);
|
|
}
|
|
|
|
self.start = function() {
|
|
iterate();
|
|
return self;
|
|
};
|
|
|
|
self.left = function() {
|
|
end = position;
|
|
return iterate();
|
|
};
|
|
|
|
self.right = function() {
|
|
start = position;
|
|
return iterate();
|
|
};
|
|
}
|
|
|
|
module.exports = Bisector;
|
|
|
|
|
|
/***/ }),
|
|
/* 33 */
|
|
/***/ (function(module, exports, __webpack_require__) {
|
|
|
|
/**
|
|
* Proxy object for web worker interface for codec classes.
|
|
*
|
|
* Used by the high-level player interface.
|
|
*
|
|
* @author Brion Vibber <brion@pobox.com>
|
|
* @copyright 2015
|
|
* @license MIT-style
|
|
*/
|
|
var OGVLoader = __webpack_require__(3);
|
|
|
|
var OGVWrapperCodec = (function(options) {
|
|
options = options || {};
|
|
var self = this,
|
|
suffix = '?version=' + encodeURIComponent(("1.4.2-20170425024925-504d7197")),
|
|
base = (typeof options.base === 'string') ? (options.base + '/') : '',
|
|
type = (typeof options.type === 'string') ? options.type : 'video/ogg',
|
|
processing = false,
|
|
demuxer = null,
|
|
videoDecoder = null,
|
|
audioDecoder = null,
|
|
flushIter = 0;
|
|
|
|
// Wrapper for callbacks to drop them after a flush
|
|
function flushSafe(func) {
|
|
var savedFlushIter = flushIter;
|
|
return function(arg) {
|
|
if (flushIter <= savedFlushIter) {
|
|
func(arg);
|
|
}
|
|
};
|
|
}
|
|
|
|
var loadedMetadata = false;
|
|
Object.defineProperty(self, 'loadedMetadata', {
|
|
get: function() {
|
|
return loadedMetadata;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'processing', {
|
|
get: function() {
|
|
return processing/*
|
|
|| (videoDecoder && videoDecoder.processing)
|
|
|| (audioDecoder && audioDecoder.processing)*/;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'duration', {
|
|
get: function() {
|
|
if (self.loadedMetadata) {
|
|
return demuxer.duration;
|
|
} else {
|
|
return NaN;
|
|
}
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'hasAudio', {
|
|
get: function() {
|
|
return self.loadedMetadata && !!audioDecoder;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'audioReady', {
|
|
get: function() {
|
|
return self.hasAudio && demuxer.audioReady;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'audioTimestamp', {
|
|
get: function() {
|
|
return demuxer.audioTimestamp;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'audioFormat', {
|
|
get: function() {
|
|
if (self.hasAudio) {
|
|
return audioDecoder.audioFormat;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'audioBuffer', {
|
|
get: function() {
|
|
if (self.hasAudio) {
|
|
return audioDecoder.audioBuffer;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'hasVideo', {
|
|
get: function() {
|
|
return self.loadedMetadata && !!videoDecoder;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'frameReady', {
|
|
get: function() {
|
|
return self.hasVideo && demuxer.frameReady;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'frameTimestamp', {
|
|
get: function() {
|
|
return demuxer.frameTimestamp;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'keyframeTimestamp', {
|
|
get: function() {
|
|
return demuxer.keyframeTimestamp;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'nextKeyframeTimestamp', {
|
|
get: function() {
|
|
return demuxer.nextKeyframeTimestamp;
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'videoFormat', {
|
|
get: function() {
|
|
if (self.hasVideo) {
|
|
return videoDecoder.videoFormat;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'frameBuffer', {
|
|
get: function() {
|
|
if (self.hasVideo) {
|
|
return videoDecoder.frameBuffer;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
});
|
|
|
|
Object.defineProperty(self, 'seekable', {
|
|
get: function() {
|
|
return demuxer.seekable;
|
|
}
|
|
});
|
|
|
|
// - public methods
|
|
self.init = function(callback) {
|
|
var demuxerClassName;
|
|
if (options.type === 'video/webm') {
|
|
demuxerClassName = options.wasm ? 'OGVDemuxerWebMW' : 'OGVDemuxerWebM';
|
|
} else {
|
|
demuxerClassName = options.wasm ? 'OGVDemuxerOggW' : 'OGVDemuxerOgg';
|
|
}
|
|
processing = true;
|
|
OGVLoader.loadClass(demuxerClassName, function(demuxerClass) {
|
|
demuxer = new demuxerClass();
|
|
demuxer.onseek = function(offset) {
|
|
if (self.onseek) {
|
|
self.onseek(offset);
|
|
}
|
|
};
|
|
demuxer.init(function() {
|
|
processing = false;
|
|
callback();
|
|
});
|
|
});
|
|
};
|
|
|
|
self.close = function() {
|
|
if (demuxer) {
|
|
demuxer.close();
|
|
demuxer = null;
|
|
}
|
|
if (videoDecoder) {
|
|
videoDecoder.close();
|
|
videoDecoder = null;
|
|
}
|
|
if (audioDecoder) {
|
|
audioDecoder.close();
|
|
audioDecoder = null;
|
|
}
|
|
};
|
|
|
|
self.receiveInput = function(data, callback) {
|
|
demuxer.receiveInput(data, callback);
|
|
};
|
|
|
|
var audioClassMap = {
|
|
vorbis: options.wasm ? 'OGVDecoderAudioVorbisW' : 'OGVDecoderAudioVorbis',
|
|
opus: options.wasm ? 'OGVDecoderAudioOpusW' : 'OGVDecoderAudioOpus'
|
|
};
|
|
function loadAudioCodec(callback) {
|
|
if (demuxer.audioCodec) {
|
|
var className = audioClassMap[demuxer.audioCodec];
|
|
processing = true;
|
|
OGVLoader.loadClass(className, function(audioCodecClass) {
|
|
var audioOptions = {};
|
|
if (demuxer.audioFormat) {
|
|
audioOptions.audioFormat = demuxer.audioFormat;
|
|
}
|
|
audioDecoder = new audioCodecClass(audioOptions);
|
|
audioDecoder.init(function() {
|
|
loadedAudioMetadata = audioDecoder.loadedMetadata;
|
|
processing = false;
|
|
callback();
|
|
});
|
|
}, {
|
|
worker: options.worker
|
|
});
|
|
} else {
|
|
callback();
|
|
}
|
|
}
|
|
|
|
var videoClassMap = {
|
|
theora: options.wasm ? 'OGVDecoderVideoTheoraW' : 'OGVDecoderVideoTheora',
|
|
vp8: options.wasm ? 'OGVDecoderVideoVP8W' : (options.threading ? 'OGVDecoderVideoVP8MT' : 'OGVDecoderVideoVP8'),
|
|
vp9: options.wasm ? 'OGVDecoderVideoVP9W' : (options.threading ? 'OGVDecoderVideoVP9MT' : 'OGVDecoderVideoVP9')
|
|
};
|
|
function loadVideoCodec(callback) {
|
|
if (demuxer.videoCodec) {
|
|
var className = videoClassMap[demuxer.videoCodec];
|
|
processing = true;
|
|
OGVLoader.loadClass(className, function(videoCodecClass) {
|
|
var videoOptions = {};
|
|
if (demuxer.videoFormat) {
|
|
videoOptions.videoFormat = demuxer.videoFormat;
|
|
}
|
|
if (options.memoryLimit) {
|
|
videoOptions.memoryLimit = options.memoryLimit;
|
|
}
|
|
videoDecoder = new videoCodecClass(videoOptions);
|
|
videoDecoder.init(function() {
|
|
loadedVideoMetadata = videoDecoder.loadedMetadata;
|
|
processing = false;
|
|
callback();
|
|
});
|
|
}, {
|
|
worker: options.worker && !options.threading
|
|
});
|
|
} else {
|
|
callback();
|
|
}
|
|
}
|
|
|
|
var loadedDemuxerMetadata = false,
|
|
loadedAudioMetadata = false,
|
|
loadedVideoMetadata = false,
|
|
loadedAllMetadata = false;
|
|
|
|
self.process = function(callback) {
|
|
if (processing) {
|
|
throw new Error('reentrancy fail on OGVWrapperCodec.process');
|
|
}
|
|
processing = true;
|
|
|
|
var videoPacketCount = demuxer.videoPackets.length,
|
|
audioPacketCount = demuxer.audioPackets.length,
|
|
start = (window.performance ? performance.now() : Date.now());
|
|
function finish(result) {
|
|
processing = false;
|
|
var delta = (window.performance ? performance.now() : Date.now()) - start;
|
|
if (delta > 8) {
|
|
console.log('slow demux in ' + delta + ' ms; ' +
|
|
(demuxer.videoPackets.length - videoPacketCount) + ' +video packets, ' +
|
|
(demuxer.audioPackets.length - audioPacketCount) + ' +audio packets');
|
|
}
|
|
//console.log('demux returned ' + (result ? 'true' : 'false') + '; ' + demuxer.videoPackets.length + '; ' + demuxer.audioPackets.length);
|
|
callback(result);
|
|
}
|
|
|
|
function doProcessData() {
|
|
demuxer.process(finish);
|
|
}
|
|
|
|
if (demuxer.loadedMetadata && !loadedDemuxerMetadata) {
|
|
|
|
// Demuxer just reached its metadata. Load the relevant codecs!
|
|
loadAudioCodec(function() {
|
|
loadVideoCodec(function() {
|
|
loadedDemuxerMetadata = true;
|
|
loadedAudioMetadata = !audioDecoder;
|
|
loadedVideoMetadata = !videoDecoder;
|
|
loadedAllMetadata = loadedAudioMetadata && loadedVideoMetadata;
|
|
finish(true);
|
|
});
|
|
});
|
|
|
|
} else if (loadedDemuxerMetadata && !loadedAudioMetadata) {
|
|
|
|
if (audioDecoder.loadedMetadata) {
|
|
|
|
loadedAudioMetadata = true;
|
|
loadedAllMetadata = loadedAudioMetadata && loadedVideoMetadata;
|
|
finish(true);
|
|
|
|
} else if (demuxer.audioReady) {
|
|
|
|
demuxer.dequeueAudioPacket(function(packet) {
|
|
audioDecoder.processHeader(packet, function(ret) {
|
|
finish(true);
|
|
});
|
|
});
|
|
|
|
} else {
|
|
|
|
doProcessData();
|
|
|
|
}
|
|
|
|
} else if (loadedAudioMetadata && !loadedVideoMetadata) {
|
|
|
|
if (videoDecoder.loadedMetadata) {
|
|
|
|
loadedVideoMetadata = true;
|
|
loadedAllMetadata = loadedAudioMetadata && loadedVideoMetadata;
|
|
finish(true);
|
|
|
|
} else if (demuxer.frameReady) {
|
|
|
|
processing = true;
|
|
demuxer.dequeueVideoPacket(function(packet) {
|
|
videoDecoder.processHeader(packet, function() {
|
|
finish(true);
|
|
});
|
|
});
|
|
|
|
} else {
|
|
|
|
doProcessData();
|
|
|
|
}
|
|
|
|
} else if (loadedVideoMetadata && !self.loadedMetadata && loadedAllMetadata) {
|
|
|
|
// Ok we've found all the metadata there is. Enjoy.
|
|
loadedMetadata = true;
|
|
finish(true);
|
|
|
|
} else if (self.loadedMetadata && (!self.hasAudio || demuxer.audioReady) && (!self.hasVideo || demuxer.frameReady)) {
|
|
|
|
// Already queued up some packets. Go read them!
|
|
finish(true);
|
|
|
|
} else {
|
|
|
|
// We need to process more of the data we've already received,
|
|
// or ask for more if we ran out!
|
|
doProcessData();
|
|
|
|
}
|
|
|
|
};
|
|
|
|
self.decodeFrame = function(callback) {
|
|
var cb = flushSafe(callback),
|
|
timestamp = self.frameTimestamp,
|
|
keyframeTimestamp = self.keyframeTimestamp;
|
|
demuxer.dequeueVideoPacket(function(packet) {
|
|
videoDecoder.processFrame(packet, function(ok) {
|
|
// hack
|
|
if (videoDecoder.frameBuffer) {
|
|
videoDecoder.frameBuffer.timestamp = timestamp;
|
|
videoDecoder.frameBuffer.keyframeTimestamp = keyframeTimestamp;
|
|
}
|
|
cb(ok);
|
|
});
|
|
});
|
|
};
|
|
|
|
self.decodeAudio = function(callback) {
|
|
var cb = flushSafe(callback);
|
|
demuxer.dequeueAudioPacket(function(packet) {
|
|
audioDecoder.processAudio(packet, cb);
|
|
});
|
|
}
|
|
|
|
self.discardFrame = function(callback) {
|
|
demuxer.dequeueVideoPacket(function(packet) {
|
|
callback();
|
|
});
|
|
};
|
|
|
|
self.discardAudio = function(callback) {
|
|
demuxer.dequeueAudioPacket(function(packet) {
|
|
callback();
|
|
});
|
|
};
|
|
|
|
self.flush = function(callback) {
|
|
flushIter++;
|
|
demuxer.flush(callback);
|
|
};
|
|
|
|
self.getKeypointOffset = function(timeSeconds, callback) {
|
|
demuxer.getKeypointOffset(timeSeconds, callback);
|
|
};
|
|
|
|
self.seekToKeypoint = function(timeSeconds, callback) {
|
|
demuxer.seekToKeypoint(timeSeconds, flushSafe(callback));
|
|
}
|
|
|
|
self.onseek = null;
|
|
|
|
Object.defineProperty(self, "demuxerCpuTime", {
|
|
get: function() {
|
|
if (demuxer) {
|
|
return demuxer.cpuTime;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
Object.defineProperty(self, "audioCpuTime", {
|
|
get: function() {
|
|
if (audioDecoder) {
|
|
return audioDecoder.cpuTime;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
Object.defineProperty(self, "videoCpuTime", {
|
|
get: function() {
|
|
if (videoDecoder) {
|
|
return videoDecoder.cpuTime;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
});
|
|
|
|
return self;
|
|
});
|
|
|
|
module.exports = OGVWrapperCodec;
|
|
|
|
|
|
/***/ })
|
|
/******/ ])
|
|
});
|
|
; |