ResizeYUV420LanczosInit
Initializes the spec structure for the NV12 resize
transform by interpolation with the Lanczos filter.
Syntax
IppStatus
ippiResizeYUV420LanczosInit(IppiSize
srcSize
, IppiSize
dstSize
, Ipp32u
numLobes
, IppiResizeYUV420Spec*
pSpec
, Ipp8u*
pInitBuf
);
Include Files
ippi.h
Domain Dependencies
Headers:
ippcore.h
, ippvm.h
, ipps.h
Libraries:
ippcore.lib
, ippvm.lib
, ipps.lib
Parameters
- srcSize
- Size in pixels of the source image.
- dstSize
- Size in pixels of the destination image.
- numLobes
- Parameter for Lanczos filters. Possible values are 2 or 3.
- pSpec
- Pointer to the spec structure for the resize filter.
- pInitBuf
- Pointer to the temporal buffer for the cubic filter initialization.
Description
This function initializes the
IppiResizeYUV420Spec
structure for the resize algorithm with the
Lanczos filter interpolation method. This method is based on the 2-lobed or 3-lobed
Lanzos window function as an interpolation function depending on the value of the
numLobes
parameter.To calculate the size of the spec structure object, call the
ippiResizeYUV420GetSize
function.The function
ippiResizeYUV420LanczosInit
requires the external buffer pInitBuf
. Prior to using this
function, you need to call ippiResizeYUV420GetSize
for the
corresponding flavors to compute the size of the buffer.Return Values
- ippStsNoErr
- Indicates no error.
- ippStsNullPtrErr
- Indicates an error if one of the specified pointers isNULL.
- ippStsResizeNoOperation
- Indicates an error if width or height of the image is equal to zero.
- ippStsSizeWrn
- Indicates a warning if width or height of the image is odd.
- ippStsSizeErr
- Indicates an error in the following cases:
- if width or height of the source or destination image is equal to 1,
- if width or height of the source or destination image is negative,
- if the source image size is less than the Lanczos interpolation filter size: 8x8 for 2-lobed Lanczos function, or 12x12 for 3-lobed Lanczos function.
- ippStsNotSupportedModeErr
- Indicates an error if the requested mode is not supported.