NvMediaLDCRegionConfig Struct Reference

Detailed Description

Holds the NvMedia LDC region configuration.

This structure defines the layout of the control points in the destination image.

The control points are used as the basis for geometric transformation from source image to destination image. The remaining points are transformed based on the interpolation. Thus the density of the control points controls the quality of the geometric transformation.

This is an example of defining regions in the image:

         (dstRect->x1 - dstRect->x0)
      /                              \
     /                                \
    /                                  \
 
horRegionWidth[0]         horRegionWidth[numHorRegion -1]
    /     \                     /      \
   |-------|                   |--------|
   --------------------------------------                                      \
   |******** ******** ...      ******** |--                                     \
   |* +  + * *      * ...      *      * |   \                                    \
   |* +  + * *      *          *      * | verRegionHeight[0]                      \
   |* +  + * *      *          *      * |   /                                      \
   |******** ********          ******** |--                                         \
   |..                         ..       |                                            \
   |..                         ..       |
   |..                         ..       |                           (dstRect->y1 - dstRect->y0)
   |                                    |
   |                                    |                                            /
   |******** ********...       ******** |--                                         /
   |*      * *      *...       *      * |  \                                       /
   |*      * *      *          *      * | verRegionHeight[numVerRegion -1]        /
   |*      * *      *          *      * |  /                                     /
   |******** ********          ******** |--                                     /
   --------------------------------------

This is an example of defining control points in one region:

*********
*  +  + *-- \
*       *     (1 << log2verSpace)
*  +  + *-- /
*       *
*********
   |--|
 (1 << log2horSpace)

Restrictions

• numHorRegion cannot exceed NVMEDIA_LDC_MAX_HOR_REGION.
• numVerRegion cannot exceed NVMEDIA_LDC_MAX_VER_REGION.
• Alignment restrictions:
  • horRegionWidth[0] to horRegionWidth[numHorRegion-2] must be greater than and aligned to NVMEDIA_LDC_MIN_REGION_WIDTH. horRegionWidth[numHorRegion-1] must be greater than NVMEDIA_LDC_MIN_REGION_WIDTH.
  • verRegionHeight[0] to verRegionHeight[numVerRegion-2] must be greater than and aligned to NVMEDIA_LDC_MIN_REGION_HEIGHT. verRegionHeight[numVerRegion-1] must be greater than NVMEDIA_LDC_MIN_REGION_HEIGHT.
• Region width/height restrictions:
  • The sum of horRegionWidth[] must be equal to the width of the dstRect argument passed to NvMediaLDCCreateNew().
  • The sum of verRegionHeight[] must be equal to the height of dstRect argument passed to NvMediaLDCCreateNew().

Definition at line 302 of file nvmedia_ldc.h.

Data Fields
uint8_t	numHorRegion
	Holds the number of horizontal regions. More...
uint8_t	numVerRegion
	Holds the number of vertical regions. More...
uint16_t	horRegionWidth [NVMEDIA_LDC_MAX_HOR_REGION]
	Holds the width of regions. More...
uint16_t	verRegionHeight [NVMEDIA_LDC_MAX_VER_REGION]
	Holds the height of regions. More...
uint16_t	log2horSpace [NVMEDIA_LDC_MAX_HOR_REGION]
	Holds the horizontal interval between the control points in each region in log2 space. More...
uint16_t	log2verSpace [NVMEDIA_LDC_MAX_VER_REGION]
	Holds the vertical interval between the control points in each region in log2 space. More...

Field Documentation

horRegionWidth

uint16_t NvMediaLDCRegionConfig::horRegionWidth[NVMEDIA_LDC_MAX_HOR_REGION]

Holds the width of regions.

Definition at line 312 of file nvmedia_ldc.h.

log2horSpace

uint16_t NvMediaLDCRegionConfig::log2horSpace[NVMEDIA_LDC_MAX_HOR_REGION]

Holds the horizontal interval between the control points in each region in log2 space.

Definition at line 319 of file nvmedia_ldc.h.

log2verSpace

uint16_t NvMediaLDCRegionConfig::log2verSpace[NVMEDIA_LDC_MAX_VER_REGION]

Holds the vertical interval between the control points in each region in log2 space.

Definition at line 323 of file nvmedia_ldc.h.

numHorRegion

uint8_t NvMediaLDCRegionConfig::numHorRegion

Holds the number of horizontal regions.

Allowed values are [1, 4], inclusive.

Definition at line 305 of file nvmedia_ldc.h.

numVerRegion

uint8_t NvMediaLDCRegionConfig::numVerRegion

Holds the number of vertical regions.

Allowed values are [1, 4], inclusive.

Definition at line 309 of file nvmedia_ldc.h.

verRegionHeight

uint16_t NvMediaLDCRegionConfig::verRegionHeight[NVMEDIA_LDC_MAX_VER_REGION]

Holds the height of regions.

Definition at line 315 of file nvmedia_ldc.h.

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The documentation for this struct was generated from the following file:

• nvmedia_ldc.h