mb_access.c File Reference

Functions for macroblock neighborhoods. More...

#include "global.h"
#include "mbuffer.h"
#include "mb_access.h"

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Functions
Boolean	mb_is_available (int mbAddr, Macroblock *currMB)
void	CheckAvailabilityOfNeighbors (Macroblock *currMB)
void	get_mb_block_pos_normal (int mb_addr, short *x, short *y)
void	get_mb_block_pos_mbaff (int mb_addr, short *x, short *y)
void	get_mb_pos (ImageParameters *p_Img, int mb_addr, int mb_size[2], short *x, short *y)
void	getNonAffNeighbour (Macroblock *currMB, int xN, int yN, int mb_size[2], PixelPos *pix)
void	getAffNeighbour (Macroblock *currMB, int xN, int yN, int mb_size[2], PixelPos *pix)
void	get4x4Neighbour (Macroblock *currMB, int block_x, int block_y, int mb_size[2], PixelPos *pix)

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Detailed Description

Functions for macroblock neighborhoods.

Author:

Main contributors (see contributors.h for copyright, address and affiliation details)

• Karsten Sühring <suehring@hhi.de>

Definition in file mb_access.c.

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Function Documentation

void CheckAvailabilityOfNeighbors

(

Macroblock *

currMB

)

Checks the availability of neighboring macroblocks of the current macroblock for prediction and context determination;.

Definition at line 49 of file mb_access.c.

References mb_is_available(), macroblock::mb_left, macroblock::mb_up, macroblock::mbAddrX, and macroblock::p_Img.

Referenced by DeblockMb(), and start_macroblock().

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void get4x4Neighbour	(	Macroblock *	currMB,
		int	block_x,
		int	block_y,
		int	mb_size[2],
		PixelPos *	pix
	)

get neighboring 4x4 block

Parameters:

	currMB	current macroblock
	block_x	input x block position
	block_y	input y block position
	mb_size	Macroblock size in pixel (according to luma or chroma MB access)
	pix	returns position informations

Definition at line 566 of file mb_access.c.

References macroblock::p_Img.

Referenced by get_neighbors(), predict_nnz(), predict_nnz_chroma(), read_and_store_CBP_block_bit_444(), read_and_store_CBP_block_bit_normal(), read_ipred_modes(), readCBP_CABAC(), readMVD_CABAC(), and readRefFrame_CABAC().

void get_mb_block_pos_mbaff	(	int	mb_addr,
		short *	x,
		short *	y
	)

returns the x and y macroblock coordinates for a given MbAddress for mbaff type slices

Definition at line 108 of file mb_access.c.

Referenced by init_picture().

void get_mb_block_pos_normal	(	int	mb_addr,
		short *	x,
		short *	y
	)

returns the x and y macroblock coordinates for a given MbAddress

Definition at line 95 of file mb_access.c.

Referenced by init_picture().

void get_mb_pos	(	ImageParameters *	p_Img,
		int	mb_addr,
		int	mb_size[2],
		short *	x,
		short *	y
	)

returns the x and y sample coordinates for a given MbAddress

Definition at line 120 of file mb_access.c.

Referenced by DeblockMb(), and getAffNeighbour().

void getAffNeighbour	(	Macroblock *	currMB,
		int	xN,
		int	yN,
		int	mb_size[2],
		PixelPos *	pix
	)

get neighboring positions for aff coding

Parameters:

	currMB	current macroblock
	xN	input x position
	yN	input y position
	mb_size	Macroblock size in pixel (according to luma or chroma MB access)
	pix	returns position informations

Definition at line 219 of file mb_access.c.

References get_mb_pos(), macroblock::mbAddrX, and macroblock::p_Img.

Referenced by init_picture().

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void getNonAffNeighbour	(	Macroblock *	currMB,
		int	xN,
		int	yN,
		int	mb_size[2],
		PixelPos *	pix
	)

get neighbouring positions for non-aff coding

Parameters:

	currMB	current macroblock
	xN	input x position
	yN	input y position
	mb_size	Macroblock size in pixel (according to luma or chroma MB access)
	pix	returns position informations

Definition at line 145 of file mb_access.c.

References macroblock::mbAddrX, and macroblock::p_Img.

Referenced by init_picture().

Boolean mb_is_available	(	int	mbAddr,
		Macroblock *	currMB
	)

returns 1 if the macroblock at the given address is available

Definition at line 25 of file mb_access.c.

References macroblock::p_Img.

Referenced by CheckAvailabilityOfNeighbors(), read_one_macroblock_b_slice(), and read_one_macroblock_p_slice().