forked from protonphoton/LJ
44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
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// helper functions
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/**
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* Provides requestAnimationFrame in a cross browser way.
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*/
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window.requestAnimFrame = (function() {
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return window.requestAnimationFrame ||
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window.webkitRequestAnimationFrame ||
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window.mozRequestAnimationFrame ||
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window.oRequestAnimationFrame ||
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window.msRequestAnimationFrame ||
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function(/* function FrameRequestCallback */ callback, /* DOMElement Element */ element) {
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return window.setTimeout(callback, 1000/60);
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};
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})();
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/**
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* Provides cancelRequestAnimationFrame in a cross browser way.
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*/
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window.cancelRequestAnimFrame = (function() {
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return window.cancelAnimationFrame ||
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window.webkitCancelRequestAnimationFrame ||
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window.mozCancelRequestAnimationFrame ||
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window.oCancelRequestAnimationFrame ||
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window.msCancelRequestAnimationFrame ||
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window.clearTimeout;
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})();
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// video support utility functions
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function supports_video() {
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return !!document.createElement('video').canPlayType;
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}
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function supports_h264_baseline_video() {
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if (!supports_video()) { return false; }
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var v = document.createElement("video");
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return v.canPlayType('video/mp4; codecs="avc1.42E01E, mp4a.40.2"');
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}
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function supports_webm_video() {
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if (!supports_video()) { return false; }
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var v = document.createElement("video");
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return v.canPlayType('video/webm; codecs="vp8"');
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}
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