PyrDownGetBufSize

Computes the size of temporary buffer for the function ippiPyrDown.

Syntax

IppStatus ippiPyrDownGetBufSize_Gauss5x5(int roiWidth, IppDataType dataType, int channels, int* pBufferSize);

Parameters

roiWidth: Width of the source image ROI in pixels.
dataType: Data type of the source image.
channels: Number of channels.
pBufferSize: Pointer to the computed size of the temporary buffer.

Description

The function ippiPyrDownGetBufSize is declared in the ippcv.h file. This function calculates the size of the temporary buffer to be used by the function ippiPyrDown. The buffer of the calculated size can be used to process smaller images.

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtr	Indicates an error condition if the pBufferSize pointer is `NULL`.
ippStsSizeErr	Indicates an error condition if the value of roiWidth is zero or negative.
ippStsNumChannelsErr	Indicates an error condition if channels is not 1 or 3.
ippStsDataTypeErr	Indicates an error condition if dataType is not Ipp8u, Ipp8s, or Ipp32f.