Intel® Integrated Performance Primitives Developer Reference

Developer Reference

  • 2021
  • 01/15/2021
  • Public Content
Contents

SampleUp

Up-samples a signal, conceptually increasing its sampling rate by an integer factor.

Syntax

IppStatus ippsSampleUp_16s (const Ipp16s*
pSrc
, int
srcLen
, Ipp16s*
pDst
, int*
pDstLen
, int
factor
, int*
pPhase
);
IppStatus ippsSampleUp_32f (const Ipp32f*
pSrc
, int
srcLen
, Ipp32f*
pDst
, int*
pDstLen
, int
factor
, int*
pPhase
);
IppStatus ippsSampleUp_64f (const Ipp64f*
pSrc
, int
srcLen
, Ipp64f*
pDst
, int*
pDstLen
, int
factor
, int*
pPhase
);
IppStatus ippsSampleUp_16sc (const Ipp16sc*
pSrc
, int
srcLen
, Ipp16sc*
pDst
, int*
pDstLen
, int
factor
, int*
pPhase
);
IppStatus ippsSampleUp_32fc (const Ipp32fc*
pSrc
, int
srcLen
, Ipp32fc*
pDst
, int*
pDstLen
, int
factor
, int*
pPhase
);
IppStatus ippsSampleUp_64fc (const Ipp64fc*
pSrc
, int
srcLen
, Ipp64fc*
pDst
, int*
pDstLen
, int
factor
, int*
pPhase
);
Include Files
ipps.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
Libraries:
ippcore.lib
,
ippvm.lib
Parameters
pSrc
Pointer to the source array (the signal to be up-sampled).
srcLen
Number of samples in the source array
pSrc
.
pDst
Pointer to the destination array.
pDstLen
Pointer to the length of the destination array
pDst
.
factor
Factor by which the signal is up-sampled. That is,
factor
 -1 zeros are inserted after each sample of the source array
pSrc
.
pPhase
Pointer to the
input
 phase value which determines where each sample from
pSrc
 lies within each output block of
factor
 samples in
pDst
. The value of
pPhase
 is required to be in the range [0;
factor
-1].
Description
This function up-samples the
srcLen
-length source array
pSrc
 by factor
factor
 with phase
pPhase
, and stores the result in the array
pDst
, ignoring its length value by the
pDstLen
 address.
Up-sampling inserts
factor
-1 zeros between each sample of
pSrc
. The
pPhase
 argument determines where each sample from the input array lies within each output block of
factor
 samples. The value of
pPhase
 is required to be in the range [0;
factor
-1].
For example, if the input phase is 0, then every
factor
 samples of the destination array begin with the corresponding source array sample, the other
factor-
1 samples are equal to 0. The length of the destination array is stored by the
pDstLen
 address.
The
pPhase
 value is the phase of an source array sample. It is also a returned output phase which can be used as an input phase for the first sample in the next block to process. Use
pPhase
 for block mode processing to get a continuous output signal.
The
ippsSampleUp
 functionality can be described as follows:
pDst
[
factor
* n +
phase
] =
pSrc
[n],
0
≤
 n <
srcLen
pDst
[
factor
* n + m] = 0,
0
≤
 n <
srcLen
, 0
≤
 m<
factor
, m ≠
phase
pDstLen
 =
factor
 *
srcLen
.
Return Values
ippStsNoErr
Indicates no error.
ippStsNullPtrErr
Indicates an error if the
pDst
,
pSrc
,
pDstLen
, or
pPhase
 pointer is
NULL
.
ippStsSizeErr
Indicates an error if
srcLen
 is less than or equal to 0.
ippStsSampleFactorErr
Indicates an error if
factor
 is less than or equal to 0.
ippStsSamplePhaseErr
Indicates an error when
pPhase
 is negative, or bigger than or equal to
factor
.

Product and Performance Information

1

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