Developer Reference

  • 2021
  • 03/26/2021
  • Public Content
Contents

ResamplePolyphaseGetSize
,
ResamplePolyphaseFixedGetSize

Get the size of the polyphase resampling structure.

Syntax

IppStatus ippsResamplePolyphaseGetSize_16s(Ipp32f
window
, int
nStep
, int*
pSize
, IppHintAlgorithm
hint
);
IppStatus ippsResamplePolyphaseGetSize_32f(Ipp32f
window
, int
nStep
, int*
pSize
, IppHintAlgorithm
hint
);
IppStatus ippsResamplePolyphaseFixedGetSize_16s(int
inRate
, int
outRate
, int
len
, int*
pSize
, int*
pLen
, int*
pHeight
, IppHintAlgorithm
hint
);
IppStatus ippsResamplePolyphaseFixedGetSize_32f(int
inRate
, int
outRate
, int
len
, int*
pSize
, int*
pLen
, int*
pHeight
, IppHintAlgorithm
hint
);
Include Files
ipps.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
Libraries:
ippcore.lib
,
ippvm.lib
Parameters
window
The size of the ideal lowpass filter window.
nStep
The discretization step for filter coefficients.
inRate
The input rate for fixed factor resampling.
outRate
The output rate for fixed factor resampling.
len
The filter length for fixed factor resampling.
pSize
The pointer to the variable that contains the size of the polyphase resampling structure.
pLen
The pointer to the variable that contains the real filter length.
pHeight
The pointer to the variable that contains the number of filters.
hint
Suggests using specific code (must be equal to
ippAlgHintFast
). Possible values for the
hint
parameter are given in Hint Arguments.
Description
These functions determine the size required for the fixed rate polyphase resampling structure and associated storage, the filter length, and the number of filters in the filter bank. The returned length of the filter is equal to min{l ≥
len
, l%4}, the subfilter length for zero phase is greater by 1. These values can be used for export and import of fixed polyphase resampling filter.
Return Values
ippStsNoErr
Indicates no error.
ippStsNullPtrErr
Indicates an error when one of the specified pointers is
NULL
.
ippStsSizeErr
For
ippsResamplePolyphaseGetSize
function, indicates an error when
inRate
,
outRate
,
nStep
or
len
is less than or equal to 0. For
ippsResamplePolyphaseFixedGetSize
function, indicates an error when
inRate
,
outRate
,
nStep
or
len
is less than or equal to 0.
ippStsBadArgErr
Indicates an error when
window
is less than 2/
nStep
.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.