VXLIB_addWeight_i8u_i8u_o8u

Functions
VXLIB_STATUS	VXLIB_addWeight_i8u_i8u_o8u (const uint8_t src0[restrict], const VXLIB_bufParams2D_t *src0_addr, const uint8_t src1[restrict], const VXLIB_bufParams2D_t *src1_addr, uint8_t dst[restrict], const VXLIB_bufParams2D_t *dst_addr, VXLIB_F32 alpha)
VXLIB_STATUS	VXLIB_addWeight_i8u_i8u_o8u_checkParams (const uint8_t src0[], const VXLIB_bufParams2D_t *src0_addr, const uint8_t src1[], const VXLIB_bufParams2D_t *src1_addr, const uint8_t dst[], const VXLIB_bufParams2D_t *dst_addr, VXLIB_F32 alpha)

Detailed Description

Function Documentation

VXLIB_addWeight_i8u_i8u_o8u()

VXLIB_STATUS VXLIB_addWeight_i8u_i8u_o8u	(	const uint8_t	src0[restrict],
		const VXLIB_bufParams2D_t *	src0_addr,
		const uint8_t	src1[restrict],
		const VXLIB_bufParams2D_t *	src1_addr,
		uint8_t	dst[restrict],
		const VXLIB_bufParams2D_t *	dst_addr,
		VXLIB_F32	alpha
	)

Description:

Accumulates a weighted value from an input image to an output image.

Method:

Weighted accumulation is computed by:

 dst(x,y) = (1-alpha)*src1(x,y) + alpha*src0(x,y)

Parameters

[in]	src0[]	Pointer to array containing first input image (UQ8.0)
[in]	src0_addr[]	Pointer to structure containing dimensional information of src
[in]	src1[]	Pointer to array containing first input image (UQ8.0)
[in]	src1_addr[]	Pointer to structure containing dimensional information of src
[out]	dst[]	Pointer to array containing output image (UQ8.0)
[in]	dst_addr[]	Pointer to structure containing dimensional information of dst
[in]	alpha	Parameter indicating weight for src and dst (0.0 <= alpha <= 1.0)

Assumptions:

• I/O buffer pointers are assumed to be not aliased.

Performance Considerations:

• For best performance, the following parameter settings are recommended:
  • Set widths equal to strides
  • Align all pointers to 8 byte boundaries
  • Set all stride values to a multiple of 8
  • Set all width values to a multiple of 8

VXLIB_addWeight_i8u_i8u_o8u_checkParams()

VXLIB_STATUS VXLIB_addWeight_i8u_i8u_o8u_checkParams	(	const uint8_t	src0[],
		const VXLIB_bufParams2D_t *	src0_addr,
		const uint8_t	src1[],
		const VXLIB_bufParams2D_t *	src1_addr,
		const uint8_t	dst[],
		const VXLIB_bufParams2D_t *	dst_addr,
		VXLIB_F32	alpha
	)

Description:

Checks the parameters for programming errors for the VXLIB_addWeight_i8u_i8u_o8u function.

Method:

The following checks are made:

• There shall be no NULL pointers
• All images shall have the same x and y dimensions
• The strides of each image shall be equal to or greater than the x dimension
• The alpha parameter shall be (0.0 <= alpha <= 1.0)

Parameters

[in]	src0[]	Pointer to array containing first input image (UQ8.0)
[in]	src0_addr[]	Pointer to structure containing dimensional information of src
[in]	src1[]	Pointer to array containing first input image (UQ8.0)
[in]	src1_addr[]	Pointer to structure containing dimensional information of src
[out]	dst[]	Pointer to array containing output image (UQ8.0)
[in]	dst_addr[]	Pointer to structure containing dimensional information of dst
[in]	alpha	Parameter indicating weight for src and dst (0.0 <= alpha <= 1.0)