API Quick Reference Guide

  • 2020
  • 09/30/2019
  • Public Content
Contents

iwsDCT

Syntax

typedef struct _IwsDCTParams { IppHintAlgorithm algoMode; } IwsDCTParams;
static IW_INLINE void iwsDCT_SetDefaultParams( IwsDCTParams *pParams )
IW_DECL(IppStatus) iwsDCT( const IwsVector *pSrcVector, IwsVector *pDstVector, IwTransDirection direction, const IwsDCTParams *pAuxParams );
Parameters
pSrcVector
Pointer to the source vector.
pDstVector
Pointer to the destination vector.
direction
Transform direction.
addVal
Offset value for scaling.
pAuxParams
Pointer to the auxiliary parameters structure. If
NULL
, default parameters are used.
Auxiliary Arguments
Argument
Default Value
Description
algoMode
ippAlgHintNone
Accuracy mode.
Description
This function applies discrete cosine transform (DCT) to the source vector.
This function supports the following features:
Feature
Support
In-place mode
Yes
64-bit sizes
No
Manual tiling
Yes
IwsTile
simple tiling
No
IwsTile
pipeline tiling
No
Return Values
ippStsDataTypeErr
The
dataType
value is illegal.
ippStsNoMemErr
Memory allocation failed.
ippStsNullPtrErr
At least one of the pointers (except
pTile
) is
NULL
.
ippStsNoErr
No errors.

Product and Performance Information

1

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