Make the filter state instance data #4
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In order for multiple instances of EMGFilters to be able to work independently, they must each store its own state. Make this state private class members instead of global variables.
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The filter state is presently stored in the global variables
LPF,HPFandAHF. The fact that these are global means that all instances ofEMGFiltersshare the same state, and thus interact with each other.This pull request makes this state per-instance data, thus making it possible to use multiple filter instances.
Fixes #3.
Fixes #7.
Note: the patch looks big, but only because the indentation level changed for the methods of
FILTER_2ndandFILTER_4th. If displayed asgit diff -b, it is a small patch.