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x2 speed reading ID3v2 tags. #26

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x2 speed reading ID3v2 tags. #26

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15 changes: 15 additions & 0 deletions src/filereader.js
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,21 @@
var result = event.target.result;
fncCallback(new BinaryFile(result));
};
var isID3v2 = true;
reader.onprogress = function(event) {
if (isID3v2 === false || event.target.result.length < 28) {
return;
}
isID3v2 = (event.target.result.substr(0, 3) === "ID3");
if (isID3v2) {
var data = new BinaryFile(event.target.result);
var size = ns.ID3v2.readSynchsafeInteger32At(6, data);
if (size > 0) {
fncCallback(data);
event.target.abort();
}
}
};
reader.readAsBinaryString(file);
}
};
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