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/*! videojs-resolution-switcher - 2015-7-26
* Copyright (c) 2016 Kasper Moskwiak
* Modified by Pierre Kraft and Derk-Jan Hartman
* Licensed under the Apache-2.0 license. */
(function() {
/* jshint eqnull: true*/
/* global require */
'use strict';
var videojs = null;
if(typeof window.videojs === 'undefined' && typeof require === 'function') {
videojs = require('video.js');
} else {
videojs = window.videojs;
}
(function(window, videojs) {
var videoJsResolutionSwitcher,
defaults = {
ui: true
};
/*
* Resolution menu item
*/
var MenuItem = videojs.getComponent('MenuItem');
var ResolutionMenuItem = videojs.extend(MenuItem, {
constructor: function(player, options){
options.selectable = true;
// Sets this.player_, this.options_ and initializes the component
MenuItem.call(this, player, options);
this.src = options.src;
player.on('resolutionchange', videojs.bind(this, this.update));
}
} );
ResolutionMenuItem.prototype.handleClick = function(event){
MenuItem.prototype.handleClick.call(this,event);
this.player_.currentResolution(this.options_.label);
};
ResolutionMenuItem.prototype.update = function(){
var selection = this.player_.currentResolution();
this.selected(this.options_.label === selection.label);
};
MenuItem.registerComponent('ResolutionMenuItem', ResolutionMenuItem);
/*
* Resolution menu button
*/
var MenuButton = videojs.getComponent('MenuButton');
var ResolutionMenuButton = videojs.extend(MenuButton, {
constructor: function(player, options){
this.label = document.createElement('span');
options.label = 'Quality';
// Sets this.player_, this.options_ and initializes the component
MenuButton.call(this, player, options);
this.el().setAttribute('aria-label','Quality');
this.controlText('Quality');
if(options.dynamicLabel){
videojs.addClass(this.label, 'vjs-resolution-button-label');
this.el().appendChild(this.label);
}else{
var staticLabel = document.createElement('span');
videojs.addClass(staticLabel, 'vjs-menu-icon');
this.el().appendChild(staticLabel);
}
player.on('updateSources', videojs.bind( this, this.update ) );
}
} );
ResolutionMenuButton.prototype.createItems = function(){
var menuItems = [];
var labels = (this.sources && this.sources.label) || {};
// FIXME order is not guaranteed here.
for (var key in labels) {
if (labels.hasOwnProperty(key)) {
menuItems.push(new ResolutionMenuItem(
this.player_,
{
label: key,
src: labels[key],
selected: key === (this.currentSelection ? this.currentSelection.label : false)
})
);
}
}
return menuItems;
};
ResolutionMenuButton.prototype.update = function(){
this.sources = this.player_.getGroupedSrc();
this.currentSelection = this.player_.currentResolution();
this.label.innerHTML = this.currentSelection ? this.currentSelection.label : '';
return MenuButton.prototype.update.call(this);
};
ResolutionMenuButton.prototype.buildCSSClass = function(){
return MenuButton.prototype.buildCSSClass.call( this ) + ' vjs-resolution-button';
};
MenuButton.registerComponent('ResolutionMenuButton', ResolutionMenuButton);
/**
* Initialize the plugin.
* @param {object} [options] configuration for the plugin
*/
videoJsResolutionSwitcher = function(options) {
var settings = videojs.mergeOptions(defaults, options),
player = this,
groupedSrc = {},
currentSources = {},
currentResolutionState = {};
/**
* Updates player sources or returns current source URL
* @param {Array} [src] array of sources [{src: '', type: '', label: '', res: ''}]
* @returns {Object|String|Array} videojs player object if used as setter or current source URL, object, or array of sources
*/
player.updateSrc = function(src){
//Return current src if src is not given
if(!src){ return player.src(); }
// Only add those sources which we can (maybe) play
src = src.filter( function(source) {
try {
return ( player.canPlayType( source.type ) !== '' );
} catch (e) {
// If a Tech doesn't yet have canPlayType just add it
return true;
}
});
//Sort sources
this.currentSources = src.sort(compareResolutions);
this.groupedSrc = bucketSources(this.currentSources);
// Pick one by default
var chosen = chooseSrc(this.groupedSrc, this.currentSources);
this.currentResolutionState = {
label: chosen.label,
sources: chosen.sources
};
player.trigger('updateSources');
player.setSourcesSanitized(chosen.sources, chosen.label);
player.trigger('resolutionchange');
return player;
};
/**
* Returns current resolution or sets one when label is specified
* @param {String} [label] label name
* @param {Function} [customSourcePicker] custom function to choose source. Takes 2 arguments: sources, label. Must return player object.
* @returns {Object} current resolution object {label: '', sources: []} if used as getter or player object if used as setter
*/
player.currentResolution = function(label, customSourcePicker){
if(label == null) { return this.currentResolutionState; }
// Lookup sources for label
if(!this.groupedSrc || !this.groupedSrc.label || !this.groupedSrc.label[label]){
return;
}
var sources = this.groupedSrc.label[label];
// Remember player state
var currentTime = player.currentTime();
var isPaused = player.paused();
// Hide bigPlayButton
if(!isPaused && this.player_.options_.bigPlayButton){
this.player_.bigPlayButton.hide();
}
// Change player source and wait for loadeddata event, then play video
// loadedmetadata doesn't work right now for flash.
// Probably because of https://github.com/videojs/video-js-swf/issues/124
// If player preload is 'none' and then loadeddata not fired. So, we need timeupdate event for seek handle (timeupdate doesn't work properly with flash)
var handleSeekEvent = 'loadeddata';
if(this.player_.techName_ !== 'Youtube' && this.player_.preload() === 'none' && this.player_.techName_ !== 'Flash') {
handleSeekEvent = 'timeupdate';
}
player
.setSourcesSanitized(sources, label, customSourcePicker || settings.customSourcePicker)
.one(handleSeekEvent, function() {
player.currentTime(currentTime);
player.handleTechSeeked_();
if(!isPaused){
// Start playing and hide loadingSpinner (flash issue ?)
player.play().handleTechSeeked_();
}
player.trigger('resolutionchange');
});
return player;
};
/**
* Returns grouped sources by label, resolution and type
* @returns {Object} grouped sources: { label: { key: [] }, res: { key: [] }, type: { key: [] } }
*/
player.getGroupedSrc = function(){
return this.groupedSrc;
};
player.setSourcesSanitized = function(sources, label, customSourcePicker) {
this.currentResolutionState = {
label: label,
sources: sources
};
if(typeof customSourcePicker === 'function'){
return customSourcePicker(player, sources, label);
}
player.src(sources.map(function(src) {
return {src: src.src, type: src.type, res: src.res};
}));
return player;
};
/**
* Method used for sorting list of sources
* @param {Object} a - source object with res property
* @param {Object} b - source object with res property
* @returns {Number} result of comparation
*/
function compareResolutions(a, b){
if(!a.res || !b.res){ return 0; }
return (+b.res)-(+a.res);
}
/**
* Group sources by label, resolution and type
* @param {Array} src Array of sources
* @returns {Object} grouped sources: { label: { key: [] }, res: { key: [] }, type: { key: [] } }
*/
function bucketSources(src){
var resolutions = {
label: {},
res: {},
type: {}
};
src.map(function(source) {
initResolutionKey(resolutions, 'label', source);
initResolutionKey(resolutions, 'res', source);
initResolutionKey(resolutions, 'type', source);
appendSourceToKey(resolutions, 'label', source);
appendSourceToKey(resolutions, 'res', source);
appendSourceToKey(resolutions, 'type', source);
});
return resolutions;
}
function initResolutionKey(resolutions, key, source) {
if(resolutions[key][source[key]] == null) {
resolutions[key][source[key]] = [];
}
}
function appendSourceToKey(resolutions, key, source) {
resolutions[key][source[key]].push(source);
}
/**
* Choose src if option.default is specified
* @param {Object} groupedSrc {res: { key: [] }}
* @param {Array} src Array of sources sorted by resolution used to find high and low res
* @returns {Object} {res: string, sources: []}
*/
function chooseSrc(groupedSrc, src){
var selectedRes = settings['default']; // use array access as default is a reserved keyword
var selectedLabel = '';
if (selectedRes === 'high') {
selectedRes = src[0].res;
selectedLabel = src[0].label;
} else if (selectedRes === 'low' || selectedRes == null || !groupedSrc.res[selectedRes]) {
// Select low-res if default is low or not set
selectedRes = src[src.length - 1].res;
selectedLabel = src[src.length -1].label;
} else if (groupedSrc.res[selectedRes]) {
selectedLabel = groupedSrc.res[selectedRes][0].label;
}
return {res: selectedRes, label: selectedLabel, sources: groupedSrc.res[selectedRes]};
}
function initResolutionForYt(player){
// Map youtube qualities names
var _yts = {
highres: {res: 1080, label: '1080', yt: 'highres'},
hd1080: {res: 1080, label: '1080', yt: 'hd1080'},
hd720: {res: 720, label: '720', yt: 'hd720'},
large: {res: 480, label: '480', yt: 'large'},
medium: {res: 360, label: '360', yt: 'medium'},
small: {res: 240, label: '240', yt: 'small'},
tiny: {res: 144, label: '144', yt: 'tiny'},
auto: {res: 0, label: 'auto', yt: 'auto'}
};
// Overwrite default sourcePicker function
var _customSourcePicker = function(_player, _sources, _label){
// Note that setPlayebackQuality is a suggestion. YT does not always obey it.
player.tech_.ytPlayer.setPlaybackQuality(_sources[0]._yt);
player.trigger('updateSources');
return player;
};
settings.customSourcePicker = _customSourcePicker;
// Init resolution
player.tech_.ytPlayer.setPlaybackQuality('auto');
// This is triggered when the resolution actually changes
player.tech_.ytPlayer.addEventListener('onPlaybackQualityChange', function(event){
for(var res in _yts) {
if(res.yt === event.data) {
player.currentResolution(res.label, _customSourcePicker);
return;
}
}
});
// We must wait for play event
player.one('play', function(){
var qualities = player.tech_.ytPlayer.getAvailableQualityLevels();
var _sources = [];
qualities.map(function(q){
_sources.push({
src: player.src().src,
type: player.src().type,
label: _yts[q].label,
res: _yts[q].res,
_yt: _yts[q].yt
});
});
player.groupedSrc = bucketSources(_sources);
var chosen = {label: 'auto', res: 0, sources: player.groupedSrc.label.auto};
this.currentResolutionState = {
label: chosen.label,
sources: chosen.sources
};
player.trigger('updateSources');
player.setSourcesSanitized(chosen.sources, chosen.label, _customSourcePicker);
});
}
player.ready(function(){
if( settings.ui ) {
var menuButton = new ResolutionMenuButton(player, settings);
player.controlBar.resolutionSwitcher = player.controlBar.el_.insertBefore(menuButton.el_, player.controlBar.getChild('fullscreenToggle').el_);
player.controlBar.resolutionSwitcher.dispose = function(){
this.parentNode.removeChild(this);
};
}
if(player.options_.sources.length > 1){
// tech: Html5 and Flash
// Create resolution switcher for videos form <source> tag inside <video>
player.updateSrc(player.options_.sources);
}
if(player.techName_ === 'Youtube'){
// tech: YouTube
initResolutionForYt(player);
}
});
};
// register the plugin
videojs.plugin('videoJsResolutionSwitcher', videoJsResolutionSwitcher);
})(window, videojs);
})();