ResizeYUV420

Changes a size of 4:2:0 two-plane image.

Syntax

IppStatus ippiResizeYUV420_8u_P2R(const Ipp8u* pSrcY, int srcYStep, const Ipp8u* pSrcUV, int srcUVStep, IppiSize srcRoiSize, Ipp8u* pDstY, int dstYStep, Ipp8u* pDstUV, int dstUVStep, IppiSize dstRoiSize, int interpolation, Ipp8u* pBuffer);

Parameters

pSrcY

Pointer to the ROI in the luminance plane for a source image.

srcYStep

Distance in bytes between starts of consecutive lines in the luminance plane of the source image.

pSrcUV

Pointer to the ROI in the interleaved chrominance plane for a source image.

srcUVStep

Distance in bytes between starts of consecutive lines in the interleaved chrominance plane of the source image.

srcRoiSize

Size of the source image ROI in pixels.

pDstY

Pointer to the ROI in the luminance plane for the destination image.

dstYStep

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

pDstUV

Pointer to the ROI in the interleaved chrominance plane for the destination image.

dstUVStep

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

dstRoiSize

Size of the destination ROI in pixels.

interpolation

Specifies the interpolation mode. Use one of the following values:

IPPI_INTER_LANCZOS	interpolation with Lanczos window
IPPI_INTER_SUPER	supersampling interpolation, cannot be applied for image enlarging

pBuffer

Pointer to the work buffer.

Description

The function ippiResizeYUV400 is declared in the ippi.h file. It operates with ROI (see ROI Processing in Geometric Transforms).

This function resizes the source image ROI to the destination image ROI using specified interpolation mode interpolation. The function requires the external buffer pBuffer, its size must be previously computed by calling the function ippiResizeYUV420GetBufSize.

The source image is a two-plane image in 4:2:0 sampling format in color spaces with decoupled luminance and chrominance components, for example, YUV420.

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error.
ippStsNullPtrErr	Indicates an error condition if one of the specified pointers is NULL.
ippStsSizeErr	Indicates an error condition if width or height of srcRoiSize or dstRoiSize is less than 2; or if width or height of the srcRoiSize is less than corresponding field of dstRoiSize for supersampling.
ippStsInterpolationErr	Indicates an error condition if interpolation has an illegal value.
ippStsDoubleSize	Indicates a warning if width or height of the srcRoiSize is odd.