VXLIB_channelCombine_yuyv_i8u_o8u

Functions
VXLIB_STATUS	VXLIB_channelCombine_yuyv_i8u_o8u (const uint8_t src0[restrict], const VXLIB_bufParams2D_t *src0_addr, const uint8_t src1[restrict], const VXLIB_bufParams2D_t *src1_addr, const uint8_t src2[restrict], const VXLIB_bufParams2D_t *src2_addr, uint8_t dst[restrict], const VXLIB_bufParams2D_t *dst_addr, int8_t yidx)
VXLIB_STATUS	VXLIB_channelCombine_yuyv_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 src2[], const VXLIB_bufParams2D_t *src2_addr, const uint8_t dst[], const VXLIB_bufParams2D_t *dst_addr, int8_t yidx)

Detailed Description

Function Documentation

VXLIB_channelCombine_yuyv_i8u_o8u()

VXLIB_STATUS VXLIB_channelCombine_yuyv_i8u_o8u	(	const uint8_t	src0[restrict],
		const VXLIB_bufParams2D_t *	src0_addr,
		const uint8_t	src1[restrict],
		const VXLIB_bufParams2D_t *	src1_addr,
		const uint8_t	src2[restrict],
		const VXLIB_bufParams2D_t *	src2_addr,
		uint8_t	dst[restrict],
		const VXLIB_bufParams2D_t *	dst_addr,
		int8_t	yidx
	)

Description:

Implements the Channel Combine Kernel.

Method:

The YUYV Channel Combine is implemented using the following equation:

   dst[x + yidx]            = src0[x]
   dst[x + (1 - yidx)]      = src1[x]
   dst[x + 2 + yidx]        = src0[x + 1]
   dst[x + 2 + (1 - yidx)]  = src2[x]

Parameters

[in]	src0[]	Pointer to array containing first input image (UQ8.0)
[in]	src0_addr[]	Pointer to structure containing dimensional information of src0
[in]	src1[]	Pointer to array containing second input image (UQ8.0)
[in]	src1_addr[]	Pointer to structure containing dimensional information of src1
[in]	src2[]	Pointer to array containing third input image (UQ8.0)
[in]	src2_addr[]	Pointer to structure containing dimensional information of src2
[out]	dst[]	Pointer to array containing output image (UQ8.0)
[in]	dst_addr[]	Pointer to structure containing dimensional information of dst
[in]	yidx	Parameter indicating how images should be interleaved (0: luma is in even byte offsets; 1: luma is in odd byte offsets)

Assumptions:

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

Performance Considerations:

• For best performance, the following parameter settings are recommended:
  • Set dst_addr->stride_y equal to src0_addr->stride_y * 2
  • Set src0_addr->stride_y and src1_addr->stride_y equal to src0_addr->stride_y/2
  • Align all pointers to 8 byte boundaries
  • Set all stride values to a multiple of 16
  • Set all width values to a multiple of 16

VXLIB_channelCombine_yuyv_i8u_o8u_checkParams()

VXLIB_STATUS VXLIB_channelCombine_yuyv_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	src2[],
		const VXLIB_bufParams2D_t *	src2_addr,
		const uint8_t	dst[],
		const VXLIB_bufParams2D_t *	dst_addr,
		int8_t	yidx
	)

Description:

Checks the parameters for programming errors for the VXLIB_channelCombine_yuyv_i8u_o8u function.

Method:

The following checks are made:

• There shall be no NULL pointers
• Both images shall have the same x and y dimensions
• The stride_y of the src images shall be equal to or greater than dim_x
• The stride_y of the dst image shall be equal to or greater than dim_x * 2
• The yidx shall be either 0 or 1.
• The dst image data type shall be set to VXLIB_UINT16.

Parameters

[in]	src0[]	Pointer to array containing first input image (UQ8.0)
[in]	src0_addr[]	Pointer to structure containing dimensional information of src0
[in]	src1[]	Pointer to array containing second input image (UQ8.0)
[in]	src1_addr[]	Pointer to structure containing dimensional information of src1
[in]	src2[]	Pointer to array containing third input image (UQ8.0)
[in]	src2_addr[]	Pointer to structure containing dimensional information of src2
[out]	dst[]	Pointer to array containing output image (UQ8.0)
[in]	dst_addr[]	Pointer to structure containing dimensional information of dst
[in]	yidx	Parameter indicating how images should be interleaved (0: luma is in even byte offsets; 1: luma is in odd byte offsets)