603 lines
19 KiB
JavaScript
603 lines
19 KiB
JavaScript
'use strict';
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/*@
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Ox.VideoElement <f> VideoElement Object
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options <o> Options object
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autoplay <b|false> autoplay
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items <a|[]> array of objects with src,in,out,duration
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loop <b|false> loop playback
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playbackRate <n|1> playback rate
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self <o> Shared private variable
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([options[, self]]) -> <o:Ox.Element> VideoElement Object
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loadedmetadata <!> loadedmetadata
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itemchange <!> itemchange
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seeked <!> seeked
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seeking <!> seeking
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sizechange <!> sizechange
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ended <!> ended
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@*/
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(function() {
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var queue = [],
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queueSize = 100,
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restrictedElements = [],
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requiresUserGesture = mediaPlaybackRequiresUserGesture(),
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unblock = [];
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Ox.VideoElement = function(options, self) {
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self = self || {};
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var that = Ox.Element({}, self)
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.defaults({
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autoplay: false,
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loop: false,
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playbackRate: 1,
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items: []
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})
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.options(options || {})
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.update({
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items: function() {
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self.loadedMetadata = false;
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loadItems(function() {
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self.loadedMetadata = true;
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var update = true;
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if (self.currentItem >= self.numberOfItems) {
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self.currentItem = 0;
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}
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if (!self.numberOfItems) {
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self.video.src = '';
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that.triggerEvent('durationchange', {
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duration: that.duration()
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});
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} else {
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if (self.currentItemId != self.items[self.currentItem].id) {
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// check if current item is in new items
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self.items.some(function(item, i) {
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if (item.id == self.currentItemId) {
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self.currentItem = i;
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loadNextVideo();
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update = false;
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return true;
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}
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});
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if (update) {
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self.currentItem = 0;
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self.currentItemId = self.items[self.currentItem].id;
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}
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}
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if (!update) {
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that.triggerEvent('seeked');
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that.triggerEvent('durationchange', {
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duration: that.duration()
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});
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} else {
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setCurrentVideo(function() {
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that.triggerEvent('seeked');
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that.triggerEvent('durationchange', {
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duration: that.duration()
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});
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});
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}
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}
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});
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},
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playbackRate: function() {
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self.video.playbackRate = self.options.playbackRate;
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}
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})
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.css({width: '100%', height: '100%'});
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Ox.Log('Video', 'VIDEO ELEMENT OPTIONS', self.options);
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self.currentItem = 0;
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self.currentTime = 0;
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self.currentVideo = 0;
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self.items = [];
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self.loadedMetadata = false;
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self.paused = true;
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self.seeking = false;
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self.loading = true;
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self.buffering = true;
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self.$videos = [getVideo(), getVideo()];
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self.$video = self.$videos[self.currentVideo];
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self.video = self.$video[0];
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self.$brightness = $('<div>').css({
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width: '100%',
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height: '100%',
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background: 'rgb(0, 0, 0)',
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opacity: 0
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})
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.appendTo(that);
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self.timeupdate = setInterval(function() {
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if (!self.paused
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&& !self.loading
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&& self.loadedMetadata
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&& self.items[self.currentItem]
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&& self.items[self.currentItem].out
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&& self.video.currentTime >= self.items[self.currentItem].out) {
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setCurrentItem(self.currentItem + 1);
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}
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}, 30);
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// mobile browsers only allow playing media elements after user interaction
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if (restrictedElements.length > 0) {
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unblock.push(setSource);
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setTimeout(function() {
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that.triggerEvent('requiresusergesture');
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})
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} else {
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setSource();
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}
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function getCurrentTime() {
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var item = self.items[self.currentItem];
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return self.seeking || self.loading
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? self.currentTime
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: item ? item.position + self.video.currentTime - item['in'] : 0;
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}
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function getset(key, value) {
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var ret;
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if (Ox.isUndefined(value)) {
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ret = self.video[key];
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} else {
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self.video[key] = value;
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ret = that;
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}
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return ret;
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}
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function getVideo() {
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return getVideoElement()
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.css({position: 'absolute'})
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.on({
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ended: function() {
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if (self.video == this) {
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setCurrentItem(self.currentItem + 1);
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}
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},
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loadedmetadata: function() {
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// metadata loaded in loadItems
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},
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progress: function() {
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// stop buffering if buffered to end point
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if (self.video == this && self.buffering) {
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var item = self.items[self.currentItem];
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Ox.range(self.video.buffered.length).forEach(function(i) {
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if (self.video.buffered.start(i) <= item['in']
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&& self.video.buffered.end(i) >= item.out) {
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self.video.preload = 'none';
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self.buffering = false;
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}
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});
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}
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},
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seeking: function() {
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//seeking event triggered in setCurrentTime
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},
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stop: function() {
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if (self.video == this) {
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self.video.pause();
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that.triggerEvent('ended');
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}
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}
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})
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.attr({
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preload: 'auto'
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})
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.hide()
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.appendTo(that);
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}
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function getVideoElement() {
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var video;
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if (requiresUserGesture) {
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if (queue.length) {
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video = queue.pop();
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} else {
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video = document.createElement('video');
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restrictedElements.push(video);
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}
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} else {
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video = document.createElement('video');
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}
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return $(video);
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};
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function isReady($video, callback) {
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if ($video[0].seeking) {
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that.triggerEvent('seeking');
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$video.one('seeked', function(event) {
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that.triggerEvent('seeked');
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callback($video[0]);
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});
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} else if ($video[0].readyState) {
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callback($video[0]);
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} else {
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that.triggerEvent('seeking');
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$video.one('loadedmetadata', function(event) {
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callback($video[0]);
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});
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$video.one('seeked', function(event) {
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that.triggerEvent('seeked');
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});
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}
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}
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function loadItems(callback) {
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var currentTime = 0,
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items = self.options.items.map(function(item) {
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return Ox.isObject(item) ? Ox.clone(item, true) : {src: item};
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});
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Ox.serialForEach(items,
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function(item) {
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var callback = Ox.last(arguments);
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item['in'] = item['in'] || 0;
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item.position = currentTime;
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if (item.out) {
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item.duration = item.out - item['in'];
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}
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if (item.duration) {
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if (!item.out) {
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item.out = item.duration;
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}
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currentTime += item.duration;
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item.id = getId(item);
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callback()
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} else {
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Ox.getVideoInfo(item.src, function(info) {
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item.duration = info.duration;
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if (!item.out) {
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item.out = item.duration;
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}
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currentTime += item.duration;
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item.id = getId(item);
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callback();
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});
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}
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},
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function() {
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self.items = items;
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self.numberOfItems = self.items.length;
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callback && callback();
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}
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);
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function getId(item) {
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return item.id || item.src + '/' + item['in'] + '-' + item.out;
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}
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}
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function loadNextVideo() {
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if (self.numberOfItems <= 1) {
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return;
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}
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var item = self.items[self.currentItem],
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nextItem = Ox.mod(self.currentItem + 1, self.numberOfItems),
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next = self.items[nextItem],
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$nextVideo = self.$videos[Ox.mod(self.currentVideo + 1, self.$videos.length)],
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nextVideo = $nextVideo[0];
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$nextVideo.one('loadedmetadata', function() {
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if (self.video != nextVideo) {
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nextVideo.currentTime = next['in'] || 0;
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}
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});
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nextVideo.src = next.src;
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nextVideo.preload = 'auto';
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}
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function setCurrentItem(item) {
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Ox.Log('Video', 'sCI', item, self.numberOfItems);
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var interval;
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if (item >= self.numberOfItems || item < 0) {
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if (self.options.loop) {
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item = Ox.mod(item, self.numberOfItems);
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} else {
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self.seeking = false;
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self.ended = true;
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self.paused = true;
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self.video && self.video.pause();
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that.triggerEvent('ended');
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return;
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}
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}
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self.video && self.video.pause();
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self.currentItem = item;
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self.currentItemId = self.items[self.currentItem].id;
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setCurrentVideo(function() {
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if (!self.loadedMetadata) {
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self.loadedMetadata = true;
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that.triggerEvent('loadedmetadata');
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}
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Ox.Log('Video', 'sCI', 'trigger itemchange',
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self.items[self.currentItem]['in'], self.video.currentTime, self.video.seeking);
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that.triggerEvent('sizechange');
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that.triggerEvent('itemchange', {
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item: self.currentItem
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});
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});
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}
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function setCurrentVideo(callback) {
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var css = {},
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muted = false,
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volume = 1,
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item = self.items[self.currentItem],
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next;
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Ox.Log('Video', 'sCV', item);
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['left', 'top', 'width', 'height'].forEach(function(key) {
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css[key] = self.$videos[self.currentVideo].css(key);
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});
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self.currentTime = item.position;
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self.loading = true;
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if (self.video) {
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self.$videos[self.currentVideo].hide();
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self.video.pause();
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volume = self.video.volume;
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muted = self.video.muted;
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}
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self.currentVideo = Ox.mod(self.currentVideo + 1, self.$videos.length);
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self.$video = self.$videos[self.currentVideo];
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self.video = self.$video[0];
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if (self.$video.attr('src') != item.src) {
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self.loadedMetadata && Ox.Log('Video', 'caching next item failed, reset src');
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self.video.src = item.src;
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self.video.preload = 'auto';
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}
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self.video.volume = volume;
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self.video.muted = muted;
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self.video.playbackRate = self.options.playbackRate;
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self.$video.css(css);
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self.buffering = true;
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Ox.Log('Video', 'sCV', self.video.src, item['in'],
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self.video.currentTime, self.video.seeking);
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isReady(self.$video, function(video) {
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self.$video.one('seeked', function() {
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Ox.Log('Video', 'sCV', 'seeked callback');
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self.loading = false;
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!self.paused && self.video.play();
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self.$video.show();
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callback && callback();
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loadNextVideo();
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});
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if (!self.seeking) {
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Ox.Log('Video', 'sCV set in', video.src, item['in'] || 0, video.currentTime, video.seeking);
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video.currentTime = item['in'] || 0;
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if (self.paused) {
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var promise = self.video.play();
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if (promise) {
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promise.then(function() {
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self.video.pause();
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});
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} else {
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self.video.pause();
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}
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}
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}
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});
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}
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function setCurrentItemTime(currentTime) {
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Ox.Log('Video', 'sCIT', currentTime, self.video.currentTime,
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'delta', currentTime - self.video.currentTime);
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isReady(self.$video, function(video) {
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if (self.video == video) {
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if(self.seeking) {
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self.$video.one('seeked', function() {
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that.triggerEvent('seeked');
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self.seeking = false;
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});
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}
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video.currentTime = currentTime;
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}
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});
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}
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function setCurrentTime(time) {
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Ox.Log('Video', 'sCT', time);
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var currentTime, currentItem;
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self.items.forEach(function(item, i) {
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if (time >= item.position
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&& time < item.position + item.duration) {
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currentItem = i;
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currentTime = time - item.position + item['in'];
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return false;
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}
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});
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if (self.items.length) {
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// Set to end of items if time > duration
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if (Ox.isUndefined(currentItem) && Ox.isUndefined(currentTime)) {
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currentItem = self.items.length - 1;
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currentTime = self.items[currentItem].duration + self.items[currentItem]['in'];
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}
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Ox.Log('Video', 'sCT', time, '=>', currentItem, currentTime);
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if (currentItem != self.currentItem) {
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setCurrentItem(currentItem);
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}
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self.seeking = true;
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self.currentTime = time;
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that.triggerEvent('seeking');
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setCurrentItemTime(currentTime);
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} else {
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self.currentTime = 0;
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}
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}
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function setSource() {
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Ox.Log('Video', 'self.loadedMetadata', self.loadedMetadata);
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self.loadedMetadata = false;
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loadItems(function() {
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setCurrentItem(0);
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self.options.autoplay && setTimeout(function() {
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that.play();
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});
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});
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}
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/*@
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animate <f> animate
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@*/
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that.animate = function() {
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self.$video.animate.apply(self.$video, arguments);
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return that;
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};
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/*@
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brightness <f> get/set brightness
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@*/
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that.brightness = function() {
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var ret;
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if (arguments.length == 0) {
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ret = 1 - parseFloat(self.$brightness.css('opacity'));
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} else {
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self.$brightness.css({opacity: 1 - arguments[0]});
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ret = that;
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}
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return ret;
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};
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/*@
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buffered <f> buffered
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@*/
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that.buffered = function() {
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return self.video.buffered;
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};
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/*@
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currentTime <f> get/set currentTime
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@*/
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that.currentTime = function() {
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var ret;
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if (arguments.length == 0) {
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ret = getCurrentTime();
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} else {
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self.ended = false;
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setCurrentTime(arguments[0]);
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ret = that;
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}
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return ret;
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};
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/*@
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css <f> css
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@*/
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that.css = function() {
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self.$video.css.apply(self.$video, arguments);
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return that;
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};
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/*@
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duration <f> duration
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@*/
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that.duration = function() {
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return self.items ? Ox.sum(self.items.map(function(item) {
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return item.duration;
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})) : NaN;
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};
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/*@
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muted <f> get/set muted
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@*/
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that.muted = function() {
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return getset('muted', arguments[0]);
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};
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/*@
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pause <f> pause
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@*/
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that.pause = function() {
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self.paused = true;
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self.video.pause();
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return that;
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};
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/*@
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play <f> play
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@*/
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that.play = function() {
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if (self.ended) {
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that.currentTime(0);
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}
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isReady(self.$video, function(video) {
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self.ended = false;
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self.paused = false;
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self.seeking = false;
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video.play();
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});
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return that;
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};
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that.removeElement = function() {
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self.currentTime = getCurrentTime();
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self.loading = true;
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clearInterval(self.timeupdate);
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//Chrome does not properly release resources, reset manually
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//http://code.google.com/p/chromium/issues/detail?id=31014
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self.$videos.forEach(function($video) {
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$video.attr({src: ''});
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});
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return Ox.Element.prototype.removeElement.apply(that, arguments);
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};
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/*@
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videoHeight <f> get videoHeight
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@*/
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that.videoHeight = function() {
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return self.video.videoHeight;
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};
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/*@
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videoWidth <f> get videoWidth
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@*/
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that.videoWidth = function() {
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return self.video.videoWidth;
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};
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/*@
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volume <f> get/set volume
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@*/
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that.volume = function(value) {
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return getset('volume', arguments[0]);
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};
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return that;
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};
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// mobile browsers only allow playing media elements after user interaction
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function mediaPlaybackRequiresUserGesture() {
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// test if play() is ignored when not called from an input event handler
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var video = document.createElement('video');
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video.play();
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return video.paused;
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}
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function removeBehaviorsRestrictions() {
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//Ox.Log('Video', 'remove restrictions on video', self.$video);
|
|
if (restrictedElements.length > 0) {
|
|
var rElements = restrictedElements;
|
|
restrictedElements = [];
|
|
rElements.forEach(function(video) {
|
|
video.load();
|
|
});
|
|
setTimeout(function() {
|
|
var u = unblock;
|
|
unblock = [];
|
|
u.forEach(function(callback) { callback(); });
|
|
}, 1000);
|
|
}
|
|
while (queue.length < queueSize) {
|
|
var video = document.createElement('video');
|
|
video.load();
|
|
queue.push(video);
|
|
}
|
|
}
|
|
|
|
if (requiresUserGesture) {
|
|
window.addEventListener('keydown', removeBehaviorsRestrictions);
|
|
window.addEventListener('mousedown', removeBehaviorsRestrictions);
|
|
window.addEventListener('touchstart', removeBehaviorsRestrictions);
|
|
}
|
|
})();
|