What is this declaration/language?
Google your code with litteral quotes .hx files are http://en.wikipedia.org/wiki/Haxe...
What language uses getlocalX, localcount, initscopedepth keywords like this snippet?
Looks like ActionScript Virtual Machine 2 (AVM2) byte code. Byte code isn't really intended for human consumption. You should see if you can find the source ActionScript files or failing that find an AVM2 decompiler.