Developer Reference

  • 2020
  • 07/15/2020
  • Public Content
Contents

WTInvSetDlyLine
,
WTInvGetDlyLine

Sets and gets the delay lines of the inverse wavelet transform.

Syntax

IppStatus ippsWTInvSetDlyLine_32f(IppsWTInvState_32f*
pState
, const Ipp32f*
pDlyLow
, const Ipp32f*
pDlyHigh
);
IppStatus ippsWTInvSetDlyLine_32f8u(IppsWTInvState_32f8u*
pState
, const Ipp32f*
pDlyLow
, const Ipp32f*
pDlyHigh
);
IppStatus ippsWTInvSetDlyLine_32f16s(IppsWTInvState_32f16s*
pState
, const Ipp32f*
pDlyLow
, const Ipp32f*
pDlyHigh
);
IppStatus ippsWTInvSetDlyLine_32f16u(IppsWTInvState_32f16u*
pState
, const Ipp32f*
pDlyLow
, const Ipp32f*
pDlyHigh
);
IppStatus ippsWTInvGetDlyLine_32f(IppsWTInvState_32f*
pState
, Ipp32f*
pDlyLow
, Ipp32f*
pDlyHigh
);
IppStatus ippsWTInvGetDlyLine_32f8u(IppsWTInvState_32f8u*
pState
, Ipp32f*
pDlyLow
, Ipp32f*
pDlyHigh
);
IppStatus ippsWTInvGetDlyLine_32f16s(IppsWTInvState_32f16s*
pState
, Ipp32f*
pDlyLow
, Ipp32f*
pDlyHigh
);
IppStatus ippsWTInvGetDlyLine_32f16u(IppsWTInvState_32f16u*
pState
, Ipp32f*
pDlyLow
, Ipp32f*
pDlyHigh
);
Include Files
ipps.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
Libraries:
ippcore.lib
,
ippvm.lib
Parameters
pState
Pointer to the state structure.
pDlyLow
Pointer to the vector which holds delay lines for “low frequency” components.
pDlyHigh
Pointer to the vector which holds delay lines for “high frequency” components.
Description
These functions copy the delay line values from
pDlyHigh
and
pDlyLow
, and store them into the state structure
pState
.
ippsWTInvSetDlyLine
. This function sets the delay line values of the inverse WT state.
ippsWTInvGetDlyLine
. This function gets the delay line values of the inverse WT state.
Application Notes
These functions set and read delay lines of inverse multiscale transformation. The functions receive or return filter low and high frequency component delay line vectors. The functions may be used to shape previous history of each of the components. Installation functions and read functions together ensure that delay lines from each filter are saved and reconstructed.
Delay line data format.
Despite that any delay line formats could be used inside transformations, the functions provide the simplest format of received and returned vectors. Data either transferred to or returned from the delay lines have the same format as the low and high frequency components at the input of the inverse transform functions. Thus, delay line vectors must be made up of a succession of signal prehistory counts in the same time frame as the input components.
Delay line lengths.
The length of the vectors that are transferred to or received by the delay line installation or reading functions is uniquely defined by the filter length and the value of additional filter delay.
The following expression defines the length of the delay line vector of the “low frequency” component filter in terms of the C language (integer division by two is used here for simplicity):
dlyLowLen
= (
lenLow
+
offsLow
- 1) / 2
,
where
lenLow
and
offsLow
are respectively the length and additional delay of the “low frequency” component filter.
The following expression defines the length of the delay line vector of the “high frequency” component filter in terms of the C language:
dlyHighLen
= (
lenHigh
+
offsHigh
- 1) / 2
,
where
lenHigh
and
offsHigh
are respectively the length and additional delay of the “high frequency” component filter.
The
lenLow
,
offsLow
,
lenHigh
, and
offsHigh
parameters are specified by the function
ippsWTInvInit
.
Return Values
ippStsNoErr
Indicates no error.
ippStsNullPtrErr
Indicates an error when
pDlyLow
or
pDlyHigh
is
NULL
.
ippStsStateMatchErr
Indicates an error when the state identifier
pState
is incorrect.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804