IIRGetDlyLine

Retrieves the delay line contents from the IIR filter state.

Syntax

IppStatus ippsIIRGetDlyLine32s_16s(IppsIIRState32s_16s* pState, const Ipp32s* pDlyLine);

IppStatus ippsIIRGetDlyLine32f_16s(IppsIIRState32f_16s* pState, const Ipp32f* pDlyLine);

IppStatus ippsIIRGetDlyLine64f_16s(IppsIIRState64f_16s* pState, const Ipp64f* pDlyLine);

IppStatus ippsIIRGetDlyLine64f_32s(IppsIIRState64f_32s* pState, const Ipp64f* pDlyLine);

IppStatus ippsIIRGetDlyLine64f_DF1_32s(IppsIIRState64f_32s* pState, const Ipp32s* pDlyLine);

IppStatus ippsIIRGetDlyLine32sc_16sc(IppsIIRState32sc_16sc* pState, const Ipp32sc* pDlyLine);

IppStatus ippsIIRGetDlyLine32fc_16sc(IppsIIRState32fc_16sc* pState, const Ipp32fc* pDlyLine);

IppStatus ippsIIRGetDlyLine64fc_16sc(IppsIIRState64fc_16sc* pState, const Ipp64fc* pDlyLine);

IppStatus ippsIIRGetDlyLine64fc_32sc(IppsIIRState64fc_32sc* pState, const Ipp64fc* pDlyLine);

IppStatus ippsIIRGetDlyLine_32f(IppsIIRState_32f* pState, const Ipp32f* pDlyLine);

IppStatus ippsIIRGetDlyLine64f_32f(IppsIIRState64f_32f* pState, const Ipp64f* pDlyLine);

IppStatus ippsIIRGetDlyLine_64f(IppsIIRState_64f* pState, const Ipp64f* pDlyLine);

IppStatus ippsIIRGetDlyLine_32fc(IppsIIRState_32fc* pState, const Ipp32fc* pDlyLine);

IppStatus ippsIIRGetDlyLine64fc_32fc(IppsIIRState64fc_32fc* pState, const Ipp64fc* pDlyLine);

IppStatus ippsIIRGetDlyLine_64fc(IppsIIRState_64fc* pState, const Ipp64fc* pDlyLine);

Parameters

pState	Pointer to the IIR filter state structure.
pDlyLine	Pointer to the array containing the delay line values. The number of elements in the array is order for arbitrary filters and 2*numBq for BQ filters.

Description

The function ippsIIRGetDlyLine is declared in the ipps.h file. This function copies the delay line values from the corresponding state structure pState and stores them into the arrays pDlyLine. If the pointer is NULL, then the delay line values in the state structure are initialized to zero.

The corresponding filter state must be previously initialized by the one of the initialization functions.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when the pState pointers is NULL.
ippStsContextMatchErr	Indicates an error when the state identifier is incorrect.