Read filter in second-order-section from fcf file
int ocmsp_readfcf_sos( double ** ppSOS, UINT * pnsec, double * pgain, const char * filename )
Return OE_NOERROR if succeed, otherwise, non-zero error code is returned (OE_NULL_POINTER, OE_INVALID_SIZE or OE_BAD_PARAM)
ocmsp_readfcf, ocmsp_readfcf_header, ocmsp_readfcf_ss
ocmsp.h