WarpInit_MPEG4

Initializes IppiWarpSpec_MPEG4 structure for further usage in GMC or Sprite reconstruction.

Syntax

IppStatus ippiWarpInit_MPEG4(IppiWarpSpec_MPEG4* pSpec, const int* pDU, const int* pDV, int numWarpingPoints, int spriteType, int warpingAccuracy, int roundingType, int quarterSample, int fcode, const IppiRect* pSpriteRect, const IppiRect* pVopRect);

Parameters

pSpec	Pointer to IppiWarpSpec_MPEG4 structure.
pDU	Pointer to an array of x-coordinate of warping points.
pDV	Pointer to an array of y-coordinate of warping points.
numWarpingPoints	Number of warping points, valid in [0-4].
spriteType	Indicates a sprite coding mode, takes values IPPVC_SPRITE_STATIC, indicating static sprites IPPVC_SPRITE_GMC, indicating GMC.
warpingAccuracy	Accuracy of warping, valid in [0-3].
roundingType	Parameter that determines type of rounding for pixel approximation; may be 0 or 1.
quarterSample	Parameter that indicates a quarter sample mode; may be 0 or 1.
fcode	Parameter that determines the range of motion vector, valid in the range [1,7].
pSpriteRect	Parameter that determines rectangle region for Sprite (or reference VOP for GMC).
pVopRect	Parameter that determines rectangle region for current VOP.

Description

The function ippiWarpInit_MPEG4 is declared in the ippvc.h file. This function initializes the IppiWarpSpec_MPEG4 structure for further usage in GMC or Sprite reconstruction. The meaning of parameters is described in [ISO14496], subclause 7.8.

This function is used in the MPEG-4 encoder and decoder included into Intel IPP Samples. See introduction to MPEG-4.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when at least one input pointer is NULL.
ippStsSizeErr	Indicates no error when width or height of images is less than or equal to zero.
ippStsOutOfRangeErr	Indicates an error when numWarpingPoints, warpingAccuracy, or fcode are out of the valid range.