Developer Reference

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

DCTInvGetSize

Computes the size of all buffers required for the inverse DCT.

Syntax

IppStatus ippsDCTInvGetSize_32f(int
len
, IppHintAlgorithm
hint
, int*
pSpecSize
, int*
pSpecBufferSize
, int*
pBufferSize
);
IppStatus ippsDCTInvGetSize_64f(int
len
, IppHintAlgorithm
hint
, int*
pSpecSize
, int*
pSpecBufferSize
, int*
pBufferSize
);
Include Files
ipps.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
Libraries:
ippcore.lib
,
ippvm.lib
Parameters
len
Number of samples in the DCT.
hint
This parameter is deprecated. Set the value to
ippAlgHintNone
.
pSpecSize
Pointer to the size of the forward DCT specification structure.
pSpecBufferSize
Pointer to the size of the work buffer for the initialization function.
pBufferSize
Pointer to the size of the forward DCT work buffer.
Description
This function computes in bytes the size
pSpecSize
of the external buffer for the inverse DCT structure with the following parameters: the transform
len
, and the specific code
hint
. Additionally the function computes the size
pSpecBufferSize
of the work buffer for the initialization function
ippsDCTInvInit
and the size
pBufferSize
of the work buffer for the function
ippsDCTInv
.
The function
ippsDCTInvGetSize
must be called prior to them.
Return Values
ippStsNoErr
Indicates no error.
ippStsNullPtrErr
Indicates an error if one of the specified pointers is
NULL
.
ippStsSizeErr
Indicates an error when
len
is less than or equal to 0.

Product and Performance Information

1

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