463 lines
14 KiB
JavaScript
463 lines
14 KiB
JavaScript
// vim: et:ts=4:sw=4:sts=4:ft=javascript
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'use strict';
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/*@
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Ox.VideoElement <f:Ox.Element> VideoElement Object
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() -> <f> VideoElement Object
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(options) -> <f> VideoElement Object
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(options, self) -> <f> VideoElement Object
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options <o> Options object
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self <o> shared private variable
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@*/
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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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preload: 'none',
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src: []
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})
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.options(options || {})
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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.items = [];
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self.paused = true;
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self.$video = $('<div>');
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if (Ox.isFunction(self.options.src)) {
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self.isPlaylist = true;
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self.currentItem = 0;
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self.currentPage = 0;
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self.loadedMetadata = false;
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self.pageLength = 2;
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self.options.src(function(items) {
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self.numberOfItems = items;
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self.numberOfPages = Math.ceil(self.numberOfItems / self.pageLength);
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loadPages(function() {
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Ox.Log('Video', 'VIDEO PAGES LOADED');
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setCurrentItem(0);
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if (!self.loadedMedatata) {
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self.loadedMetadata = true;
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that.triggerEvent('loadedmetadata');
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that.triggerEvent('pointschange'); // fixme: needs to be triggered again, loadedmetadata messes with duration
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}
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});
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});
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} else {
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self.numberOfItems = 1;
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self.items.push(loadItem(self.options.src));
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}
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function getCurrentPage() {
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return Math.floor(self.currentItem / self.pageLength);
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}
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function getCurrentTime() {
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return self.items[self.currentItem].offsets[self.currentPart] + self.video.currentTime;
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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 loadPage(page, callback) {
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Ox.Log('Video', 'VIDEO loadPage', page);
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//page = Ox.mod(page, self.numberOfPages);
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var loadedmetadata = 0,
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start = page * self.pageLength,
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stop = Math.min(start + self.pageLength, self.numberOfItems),
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pageLength = stop - start;
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if (!self.items[start]) {
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self.options.src([start, stop], function(data) {
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data.forEach(function(data, i) {
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self.items[start + i] = loadItem(data.parts, data.points, function(item) {
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if (++loadedmetadata == pageLength) {
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Ox.Log('Video', 'VIDEO page', page, 'loaded');
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callback && callback();
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}
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});
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});
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});
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} else {
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Ox.Log('Video', 'PAGE IN CACHE');
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callback && callback();
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}
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}
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function loadPages(callback) {
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var currentPage = self.currentPage,
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nextPage = Ox.mod(currentPage + 1, self.numberOfPages),
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previousPage = Ox.mod(currentPage - 1, self.numberOfPages);
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loadPage(currentPage, function() {
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if (nextPage != currentPage) {
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loadPage(nextPage, function() {
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if (previousPage != currentPage && previousPage != nextPage) {
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unloadPage(previousPage);
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}
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});
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}
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callback && callback();
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});
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}
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function loadItem(src, points, callback) {
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src = Ox.isArray(src) ? src : [src];
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var item = {
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currentPart: 0,
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duration: 0,
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durations: src.map(function() {
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return 0;
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}),
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offsets: [],
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parts: src.length
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};
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if (points) {
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item.points = points;
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}
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item.$videos = src.map(function(src, i) {
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// in all browsers except firefox,
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// loadedmetadata fires only once per src
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src += '?' + Ox.uid();
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return $('<video>')
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.css({position: 'absolute'})
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.bind({
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ended: function() {
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if (i < item.parts - 1) {
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setCurrentPart(self.currentPart + 1);
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self.video.play();
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} /*else if (self.isPlaylist) {
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setCurrentItem(self.currentItem + 1);
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self.video.play();
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}*/ else {
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self.ended = true;
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self.paused = true;
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that.triggerEvent('ended');
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}
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},
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loadedmetadata: function() {
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item.durations[i] = item.videos[i].duration;
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if (self.isPlaylist && i == 0) {
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item.videos[0].currentTime = item.points[0];
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}
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if (Ox.every(item.durations)) {
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item.duration = Ox.sum(item.durations);
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item.offsets = Ox.range(item.parts).map(function(i) {
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return Ox.sum(Ox.sub(item.durations, 0, i));
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});
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//Ox.Log('Video', 'METADATA OF', src, 'LOADED', item)
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if (self.isPlaylist) {
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callback && callback();
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} else {
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setCurrentItem(0);
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that.triggerEvent('loadedmetadata');
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}
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}
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},
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progress: function() {
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// not implemented
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},
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seeked: function() {
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that.triggerEvent('seeked');
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},
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seeking: function() {
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that.triggerEvent('seeking');
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},
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stop: function() {
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// custom event to be triggered on removal from the DOM
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if (self.video) {
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self.video.pause();
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self.video.src = '';
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}
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that.triggerEvent('ended');
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}
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})
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.attr(Ox.extend({
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preload: 'metadata',
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src: src
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}, i == 0 && self.options.autoplay ? {
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autoplay: 'autoplay'
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} : {}))
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.hide()
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.appendTo(that.$element);
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});
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item.videos = item.$videos.map(function($video) {
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return $video[0];
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});
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self.$brightness = $('<div>').css({
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width: '100%',
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height: '100%',
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background: 'rgb(0, 0, 0)',
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opacity: 0
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})
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.appendTo(that.$element);
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return item;
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}
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function setCurrentItem(item) {
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Ox.Log('Video', 'scI', item);
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var interval;
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item = Ox.mod(item, self.numberOfItems);
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self.video && self.video.pause();
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if (self.items[item]) {
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set();
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} else {
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that.triggerEvent('seeking');
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interval = setInterval(function() {
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Ox.Log('Video', 'ITEM', item, 'NOT AVAILABLE');
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if (self.items[item]) {
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clearInterval(interval);
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that.triggerEvent('seeked');
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set();
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}
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}, 250);
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}
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function set() {
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self.currentItem = item;
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self.currentPart = -1;
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setCurrentTime(0);
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if (self.isPlaylist) {
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that.triggerEvent('pointschange');
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that.triggerEvent('sizechange');
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self.currentPage = getCurrentPage();
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loadPages();
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}
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}
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}
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function setCurrentPart(part) {
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Ox.Log('Video', 'sCP', part);
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var css = {},
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muted = false,
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volume = 1;
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['left', 'top', 'width', 'height'].forEach(function(key) {
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css[key] = self.$video.css(key);
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});
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if (self.video) {
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self.$video.hide();
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self.video.pause();
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self.video.currentTime = 0;
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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.$video = self.items[self.currentItem].$videos[part].css(css).show();
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self.video = self.$video[0];
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self.video.volume = volume;
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self.video.muted = muted;
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!self.paused && self.video.play();
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self.currentPart = part;
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Ox.Log('Video', 'sCP', part, self.video.src);
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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 currentPart, currentTime,
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item = self.items[self.currentItem];
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Ox.loop(item.parts - 1, -1, -1, function(i) {
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if (item.offsets[i] <= time) {
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currentPart = i;
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currentTime = time - item.offsets[i];
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return false;
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}
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});
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Ox.Log('Video', 'sCT', time, currentPart, currentTime);
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if (currentPart != self.currentPart) {
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setCurrentPart(currentPart);
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}
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self.video.currentTime = currentTime;
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}
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function unloadPage(page) {
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//page = Ox.mod(page, self.numberOfPages);
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Ox.Log('Video', 'unloadPage', page);
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var start = page * self.pageLength,
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stop = Math.min(start + self.pageLength, self.numberOfItems);
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Ox.range(start, stop).forEach(function(i) {
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if (self.items[i]) {
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self.items[i].$videos.forEach(function($video) {
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$video[0].src = '';
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$video.remove();
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});
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delete self.items[i];
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}
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});
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}
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/*@
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animate <f> animate
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@*/
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that.animate = function() {
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self.$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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self.ended = false;
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if (arguments.length == 0) {
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ret = getCurrentTime();
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} else {
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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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var interval;
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if (self.$video) {
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self.$video.css.apply(self.$video, arguments);
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} else {
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interval = setInterval(function() {
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Ox.Log('Video', 'VIDEO NOT YET AVAILABLE');
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if (self.$video) {
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clearInterval(interval);
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self.$video.css.apply(self.$video, arguments);
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}
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}, 250);
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}
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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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// 86399
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return self.items[self.currentItem].duration;
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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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points <f> get points
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@*/
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that.points = function() {
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return self.items[self.currentItem].points;
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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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self.ended = false;
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}
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self.paused = false;
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self.video.play();
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return that;
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};
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/*@
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playNext <f> play next
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@*/
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that.playNext = function() {
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Ox.Log('Video', 'PLAY NEXT');
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setCurrentItem(self.currentItem + 1);
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self.video.play();
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};
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/*@
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playPrevious <f> play previous
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@*/
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that.playPrevious = function() {
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setCurrentItem(self.currentItem - 1);
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};
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/*@
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src <f> get/set src
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@*/
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that.src = function() {
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var ret;
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if (arguments.length == 0) {
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ret = self.video.src;
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} else {
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self.options.src = Ox.isArray(arguments[0]) ? arguments[0] : [arguments[0]];
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self.$video[self.currentPart].src = self.options.src[self.currentPart];
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self.$video.each(function(video, i) {
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if (i != self.currentPart) {
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video.src = self.options.src[i];
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}
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});
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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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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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