Intel® Integrated Performance Primitives Developer Guide and Reference

ID 790148
Date 11/07/2023
Public

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Document Table of Contents

Div

Divides pixel values of an image by pixel values of another image.

Syntax

Case 1: Not-in-place operation on integer or complex data

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc1, int src1Step, const Ipp<datatype>* pSrc2, int src2Step, Ipp<datatype>* pDst, int dstStep, IppiSize roiSize, int scaleFactor);

Supported values for mod:

8u_C1RSfs

16u_C1RSfs

16s_C1RSfs

8u_C3RSfs

16u_C3RSfs

16s_C3RSfs

8u_AC4RSfs

16u_AC4RSfs

16s_AC4RSfs

8u_C4RSfs

16u_C4RSfs

16s_C4RSfs

Case 2: Not-in-place operation on floating-point or complex data

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc1, int src1Step, const Ipp<datatype>* pSrc2, int src2Step, Ipp<datatype>* pDst, int dstStep, IppiSize roiSize);

Supported values for mod:

32f_C1R

32f_C3R

32f_AC4R

32f_C4R

Case 3: In-place operation on integer or complex data

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc, int srcStep, Ipp<datatype>* pSrcDst, int srcDstStep, IppiSize roiSize, int scaleFactor);

Supported values for mod:

8u_C1IRSfs

16u_C1IRSfs

16s_C1IRSfs

8u_C3IRSfs

16u_C3IRSfs

16s_C3IRSfs

8u_AC4IRSfs

16u_AC4IRSfs

16s_AC4IRSfs

8u_C4IRSfs

16u_C4IRSfs

16s_C4IRSfs

Case 4: In-place operation on floating-point or complex data

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc, int srcStep, Ipp<datatype>* pSrcDst, int srcDstStep, IppiSize roiSize);

Supported values for mod:

32f_C1IR

32f_C3IR

32f_AC4IR

32f_C4IR

Case 5: Not-in-place operation on integer data with platform-aware functions

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc1, IppSizeL src1Step, const Ipp<datatype>* pSrc2, IppSizeL src2Step, Ipp<datatype>* pDst, IppSizeL dstStep, IppiSizeL roiSize, int scaleFactor);

Supported values for mod:

8u_C1RSfs_L

16u_C1RSfs_L

16s_C1RSfs_L

8u_C3RSfs_L

16u_C3RSfs_L

16s_C3RSfs_L

8u_AC4RSfs_L

16u_AC4RSfs_L

16s_AC4RSfs_L

8u_C4RSfs_L

16u_C4RSfs_L

16s_C4RSfs_L

Case 6: Not-in-place operation on floating-point data with platform-aware functions

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc1, IppSizeL src1Step, const Ipp<datatype>* pSrc2, IppSizeL src2Step, Ipp<datatype>* pDst, IppSizeL dstStep, IppiSizeL roiSize);

Supported values for mod:

32f_C1R_L

32f_C3R_L

32f_AC4R_L

32f_C4R_L

Case 7: In-place operation on integer data with platform-aware functions

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc, IppSizeL srcStep, Ipp<datatype>* pSrcDst, IppSizeL srcDstStep, IppiSizeL roiSize, int scaleFactor);

Supported values for mod:

8u_C1IRSfs_L

16u_C1IRSfs_L

16s_C1IRSfs_L

8u_C3IRSfs_L

16u_C3IRSfs_L

16s_C3IRSfs_L

8u_AC4IRSfs_L

16u_AC4IRSfs_L

16s_AC4IRSfs_L

8u_C4IRSfs_L

16u_C4IRSfs_L

16s_C4IRSfs_L

Case 8: In-place operation on floating-point data with platform-aware functions

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc, IppSizeL srcStep, Ipp<datatype>* pSrcDst, IppSizeL srcDstStep, IppiSizeL roiSize);

Supported values for mod:

32f_C1IR_L

32f_C3IR_L

32f_AC4IR_L

32f_C4IR_L

Case 9: Not-in-place operation on integer data with threading layer (TL) functions

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc1, IppSizeL src1Step, const Ipp<datatype>* pSrc2, IppSizeL src2Step, Ipp<datatype>* pDst, IppSizeL dstStep, IppiSizeL roiSize, int scaleFactor);

Supported values for mod:

8u_C1RSfs_LT

16u_C1RSfs_LT

16s_C1RSfs_LT

8u_C3RSfs_LT

16u_C3RSfs_LT

16s_C3RSfs_LT

8u_AC4RSfs_LT

16u_AC4RSfs_LT

16s_AC4RSfs_LT

8u_C4RSfs_LT

16u_C4RSfs_LT

16s_C4RSfs_LT

Case 10: Not-in-place operation on floating-point data with TL functions

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc1, IppSizeL src1Step, const Ipp<datatype>* pSrc2, IppSizeL src2Step, Ipp<datatype>* pDst, IppSizeL dstStep, IppiSizeL roiSize);

Supported values for mod:

32f_C1R_LT

32f_C3R_LT

32f_C4R_LT

32f_AC4R_LT

Case 11: In-place operation on integer data with TL functions

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc, IppSizeL srcStep, Ipp<datatype>* pSrcDst, IppSizeL srcDstStep, IppiSizeL roiSize, int scaleFactor);

Supported values for mod:

8u_C1IRSfs_LT

16u_C1IRSfs_LT

16s_C1IRSfs_LT

8u_C3IRSfs_LT

16u_C3IRSfs_LT

16s_C3IRSfs_LT

8u_AC4IRSfs_LT

16u_AC4IRSfs_LT

16s_AC4IRSfs_LT

8u_C4IRSfs_LT

16u_C4IRSfs_LT

16s_C4IRSfs_LT

Case 12: In-place operation on floating-point data with TL functions

IppStatus ippiDiv_<mod>(const Ipp<datatype>* pSrc, IppSizeL srcStep, Ipp<datatype>* pSrcDst, IppSizeL srcDstStep, IppiSizeL roiSize);

Supported values for mod:

32f_C1IR_LT

32f_C3IR_LT

32f_AC4IR_LT

32f_C4IR_LT

Include Files

ippi.h

Flavors with the _LT suffix: ippi_tl.h

Flavors with the _L suffix: ippi_l.h

Domain Dependencies

Flavors declared in ippi.h:

Headers: ippcore.h, ippvm.h, ipps.h

Libraries: ippcore.lib, ippvm.lib, ipps.lib

Flavors declared in ippi_tl.h:

Libraries: ippcore.lib, ippvm.lib, ipps.lib, ippi.lib, ippcore_tl.lib, ippi_tl.lib

Parameters

pSrc, pSrc1, pSrc2

Pointers to the source images ROI.

srcStep, src1Step, src2Step

Distances in bytes between starts of consecutive lines in the source images.

pDst

Pointer to the destination image ROI.

dstStep

Distance in bytes between starts of consecutive lines in the destination image.

pSrcDst

Pointer to the source and destination image ROI for the in-place operation.

srcDstStep

Distance in bytes between starts of consecutive lines in the source and destination image for the in-place operation.

roiSize

Size of the source and destination ROI in pixels.

scaleFactor

Scale factor (see Integer Result Scaling).

Description

This function operates with ROI (see Regions of Interest in Intel IPP).

This function divides pixel values of the source buffer pSrc2 by the corresponding pixel values of the buffer pSrc1 and places the result in a destination buffer pDst. For in-place operations, the values in pSrcDst are divided by the values in pSrc and placed into pSrcDst. For complex data, the function processes both real and imaginary parts of pixel values. In case of operations on integer data, the resulting values are scaled by scaleFactor and rounded (not truncated). When the function encounters a zero divisor value, the execution is not interrupted. The function returns the warning message and corresponding result value (see appendix “Handling of Special Cases” for more information).

Note that the functions with the AC4 descriptor do not process alpha channels.

Return Values

ippStsNoErr

Indicates no error. Any other value indicates an error or a warning.

ippStsNullPtrErr

Indicates an error condition if one of the specified pointers is NULL.

ippStsSizeErr

Indicates an error condition if roiSize has a field with zero or negative value.

ippStsStepErr

Indicates an error condition if any of the specified buffer step values is zero or negative.

ippStsDivByZero

Indicates a warning that a divisor value is zero. The function execution is continued.

Example

The code example below illustrates how the function ippiDiv can be used.

IppStatus div32f( void ) {
   Ipp32f a[4*3], b[4*3];
   IppiSize roi = {2,2};
   int i;
   for( i=0; i<4*3; ++i ) a[i] = b[i] = (float)i;
   return ippiDiv_32f_C1IR( a, 4*sizeof(Ipp32f), b, 
                              4*sizeof(Ipp32f), roi );
}

The destination image b contains

-1.#IND  +1.000  +2.000  +3.000 
+1.000   +1.000  +6.000  +7.000
+8.000   +9.000  +10.00  +11.00
Console output:

-- warning in div32f:
(6) Zero value(s) of divisor in the function Div