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var audioCodecs = [
["audio/wav", "wav"],
["audio/aac", "m4a"],
["audio/ogg", "oga"]
];
var videoCodecs = [
["video/mp4", "mp4"],
["video/ogg", "ogv"]
];
function findMediaFile(tagName, name) {
var codecs;
if (tagName == "audio")
codecs = audioCodecs;
else
codecs = videoCodecs;
var element = document.getElementsByTagName(tagName)[0];
if (!element)
element = document.createElement(tagName);
for (var i = 0; i < codecs.length; ++i) {
if (element.canPlayType(codecs[i][0]))
return name + "." + codecs[i][1];
}
return "";
}
function mimeTypeForExtension(extension) {
for (var i = 0; i < videoCodecs.length; ++i) {
if (extension == videoCodecs[i][1])
return videoCodecs[i][0];
}
for (var i = 0; i < audioCodecs.length; ++i) {
if (extension == audioCodecs[i][1])
return audioCodecs[i][0];
}
return "";
}
function mimeTypeForFile(filename) {
var lastPeriodIndex = filename.lastIndexOf(".");
if (lastPeriodIndex > 0)
return mimeTypeForExtension(filename.substring(lastPeriodIndex + 1));
return "";
}
function setSrcByTagName(tagName, src) {
var elements = document.getElementsByTagName(tagName);
if (elements) {
for (var i = 0; i < elements.length; ++i)
elements[i].src = src;
}
}
function setSrcById(id, src) {
var element = document.getElementById(id);
if (element)
element.src = src;
}
function stripExtension(filename) {
var lastPeriodIndex = filename.lastIndexOf(".");
if (lastPeriodIndex > 0)
return filename.substring(0, lastPeriodIndex);
return filename;
}
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