loopFilter.c File Reference

Filter to reduce blocking artifacts on a macroblock level. The filter strength is QP dependent. More...

#include "global.h"
#include "image.h"
#include "mb_access.h"

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Go to the source code of this file.

Defines

#define ANY_INTRA (MbP->mb_type==I4MB||MbP->mb_type==I8MB||MbP->mb_type==I16MB||MbP->mb_type==IPCM||MbQ->mb_type==I4MB||MbQ->mb_type==I8MB||MbQ->mb_type==I16MB||MbQ->mb_type==IPCM)

Functions

void GetStrengthNormal (byte Strength[MB_BLOCK_SIZE], Macroblock *MbQ, int dir, int edge, int mvlimit)

void GetStrengthMBAff (byte Strength[MB_BLOCK_SIZE], Macroblock *MbQ, int dir, int edge, int mvlimit)

void EdgeLoopLumaNormal (ColorPlane pl, imgpel **Img, byte Strength[16], Macroblock *MbQ, int dir, int edge, int width)

void EdgeLoopLumaMBAff (ColorPlane pl, imgpel **Img, byte Strength[16], Macroblock *MbQ, int dir, int edge, int width)

void EdgeLoopChromaNormal (imgpel **Img, byte Strength[16], Macroblock *MbQ, int dir, int edge, int width, int uv)

void EdgeLoopChromaMBAff (imgpel **Img, byte Strength[16], Macroblock *MbQ, int dir, int edge, int width, int uv)

void DeblockMb (ImageParameters *p_Img, imgpel **imgY, imgpel ***imgUV, int MbQAddr)

void DeblockFrame (ImageParameters *p_Img, imgpel **imgY, imgpel ***imgUV)

Variables

static const byte ALPHA_TABLE [52] = {0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,4,4,5,6, 7,8,9,10,12,13,15,17, 20,22,25,28,32,36,40,45, 50,56,63,71,80,90,101,113, 127,144,162,182,203,226,255,255}

static const byte BETA_TABLE [52] = {0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,2,2,2,3, 3,3,3, 4, 4, 4, 6, 6, 7, 7, 8, 8, 9, 9,10,10, 11,11,12,12,13,13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18}

static const byte CLIP_TAB [52][5]

static const char chroma_edge [2][4][4]

static const int pelnum_cr [2][4] = {{0,8,16,16}, {0,8, 8,16}}

Detailed Description

Filter to reduce blocking artifacts on a macroblock level. The filter strength is QP dependent.

Author:

Contributors:

Peter List Peter.List@t-systems.de: Original code (13-Aug-2001)
Jani Lainema Jani.Lainema@nokia.com: Some bug fixing, removal of recursiveness (16-Aug-2001)
Peter List Peter.List@t-systems.de: inplace filtering and various simplifications (10-Jan-2002)
Anthony Joch anthony@ubvideo.com: Simplified switching between filters and non-recursive default filter. (08-Jul-2002)
Cristina Gomila cristina.gomila@thomson.net: Simplification of the chroma deblocking from JVT-E089 (21-Nov-2002)
Alexis Michael Tourapis atour@dolby.com: Speed/Architecture improvements (08-Feb-2007)

Definition in file loopFilter.c.

Function Documentation

void DeblockFrame	(	ImageParameters *	p_Img,
		imgpel **	imgY,
		imgpel ***	imgUV
	)

Filter all macroblocks in order of increasing macroblock address.

Definition at line 81 of file loopFilter.c.

References DeblockMb(), EdgeLoopChromaMBAff(), EdgeLoopChromaNormal(), EdgeLoopLumaMBAff(), EdgeLoopLumaNormal(), GetStrengthMBAff(), GetStrengthNormal(), img_par::mb_data, macroblock::mb_type, img_par::MbaffFrameFlag, macroblock::qp, and macroblock::qpc.

Referenced by code_a_plane(), and UpdateDecoders().

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void DeblockMb	(	ImageParameters *	p_Img,
		imgpel **	imgY,
		imgpel ***	imgUV,
		int	MbQAddr
	)

Deblocking filter for one macroblock.

Definition at line 122 of file loopFilter.c.

References CheckAvailabilityOfNeighbors(), get_mb_pos(), img_par::mb_data, macroblock::mb_type, img_par::MbaffFrameFlag, img_par::structure, img_par::width, img_par::width_cr, YUV420, and YUV422.

Referenced by DeblockFrame().

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void EdgeLoopChromaMBAff	(	imgpel **	Img,
		byte	Strength[16],
		Macroblock *	MbQ,
		int	dir,
		int	edge,
		int	width,
		int	uv
	)

Filters chroma block edge for MBAFF types.

Definition at line 888 of file loopFilter.c.

References img_par::max_pel_value_comp, img_par::mb_data, macroblock::p_Img, and macroblock::qpc.

Referenced by DeblockFrame().

void EdgeLoopChromaNormal	(	imgpel **	Img,
		byte	Strength[16],
		Macroblock *	MbQ,
		int	dir,
		int	edge,
		int	width,
		int	uv
	)

Filters chroma block edge for Frame or Field coded pictures.

Definition at line 795 of file loopFilter.c.

References img_par::max_pel_value_comp, img_par::mb_data, macroblock::p_Img, and macroblock::qpc.

Referenced by DeblockFrame().

void EdgeLoopLumaMBAff	(	ColorPlane	pl,
		imgpel **	Img,
		byte	Strength[16],
		Macroblock *	MbQ,
		int	dir,
		int	edge,
		int	width
	)

Filters 16 pel block edge of Super MB Frame coded MBs.

Definition at line 661 of file loopFilter.c.

References img_par::max_pel_value_comp, img_par::mb_data, macroblock::p_Img, macroblock::qp, and macroblock::qpc.

Referenced by DeblockFrame().

void EdgeLoopLumaNormal	(	ColorPlane	pl,
		imgpel **	Img,
		byte	Strength[16],
		Macroblock *	MbQ,
		int	dir,
		int	edge,
		int	width
	)

Filters 16 pel block edge of Frame or Field coded MBs.

Definition at line 529 of file loopFilter.c.

References img_par::max_pel_value_comp, img_par::mb_data, macroblock::p_Img, macroblock::qp, and macroblock::qpc.

Referenced by DeblockFrame().

void GetStrengthMBAff	(	byte	Strength[MB_BLOCK_SIZE],
		Macroblock *	MbQ,
		int	dir,
		int	edge,
		int	mvlimit
	)

returns a buffer of 16 Strength values for one stripe in a mb (for MBAFF)

Definition at line 397 of file loopFilter.c.

References macroblock::cbp_blk, img_par::mb_data, macroblock::mb_type, macroblock::mbAddrX, img_par::MbaffFrameFlag, storable_picture::motion, pic_motion_params::mv, macroblock::p_Img, pic_motion_params::ref_idx, pic_motion_params::ref_pic_id, and img_par::structure.

Referenced by DeblockFrame().

void GetStrengthNormal	(	byte	Strength[MB_BLOCK_SIZE],
		Macroblock *	MbQ,
		int	dir,
		int	edge,
		int	mvlimit
	)

returns a buffer of 16 Strength values for one stripe in a mb (for different Frame or Field types)

Definition at line 255 of file loopFilter.c.

References macroblock::cbp_blk, img_par::mb_data, macroblock::mbAddrX, storable_picture::motion, pic_motion_params::mv, macroblock::p_Img, pic_motion_params::ref_idx, pic_motion_params::ref_pic_id, and img_par::structure.

Referenced by DeblockFrame().

Variable Documentation

const char chroma_edge[2][4][4] [static]

Initial value:

 
{ { {-4, 0, 0, 0},
    {-4,-4,-4, 4},
    {-4, 4, 4, 8},
    {-4,-4,-4, 12}},

  { {-4, 0,  0,  0},
    {-4,-4,  4,  4},
    {-4, 4,  8,  8},
    {-4,-4, 12, 12}}}

Definition at line 51 of file loopFilter.c.

const byte CLIP_TAB[52][5] [static]

Initial value:

{
  { 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},
  { 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},{ 0, 0, 0, 0, 0},
  { 0, 0, 0, 0, 0},{ 0, 0, 0, 1, 1},{ 0, 0, 0, 1, 1},{ 0, 0, 0, 1, 1},{ 0, 0, 0, 1, 1},{ 0, 0, 1, 1, 1},{ 0, 0, 1, 1, 1},{ 0, 1, 1, 1, 1},
  { 0, 1, 1, 1, 1},{ 0, 1, 1, 1, 1},{ 0, 1, 1, 1, 1},{ 0, 1, 1, 2, 2},{ 0, 1, 1, 2, 2},{ 0, 1, 1, 2, 2},{ 0, 1, 1, 2, 2},{ 0, 1, 2, 3, 3},
  { 0, 1, 2, 3, 3},{ 0, 2, 2, 3, 3},{ 0, 2, 2, 4, 4},{ 0, 2, 3, 4, 4},{ 0, 2, 3, 4, 4},{ 0, 3, 3, 5, 5},{ 0, 3, 4, 6, 6},{ 0, 3, 4, 6, 6},
  { 0, 4, 5, 7, 7},{ 0, 4, 5, 8, 8},{ 0, 4, 6, 9, 9},{ 0, 5, 7,10,10},{ 0, 6, 8,11,11},{ 0, 6, 8,13,13},{ 0, 7,10,14,14},{ 0, 8,11,16,16},
  { 0, 9,12,18,18},{ 0,10,13,20,20},{ 0,11,15,23,23},{ 0,13,17,25,25}
}

Definition at line 40 of file loopFilter.c.


Defines
#define	ANY_INTRA (MbP->mb_type==I4MB\|\|MbP->mb_type==I8MB\|\|MbP->mb_type==I16MB\|\|MbP->mb_type==IPCM\|\|MbQ->mb_type==I4MB\|\|MbQ->mb_type==I8MB\|\|MbQ->mb_type==I16MB\|\|MbQ->mb_type==IPCM)
Functions
void	GetStrengthNormal (byte Strength[MB_BLOCK_SIZE], Macroblock *MbQ, int dir, int edge, int mvlimit)
void	GetStrengthMBAff (byte Strength[MB_BLOCK_SIZE], Macroblock *MbQ, int dir, int edge, int mvlimit)
void	EdgeLoopLumaNormal (ColorPlane pl, imgpel *Img, byte Strength[16], Macroblock MbQ, int dir, int edge, int width)
void	EdgeLoopLumaMBAff (ColorPlane pl, imgpel *Img, byte Strength[16], Macroblock MbQ, int dir, int edge, int width)
void	EdgeLoopChromaNormal (imgpel *Img, byte Strength[16], Macroblock MbQ, int dir, int edge, int width, int uv)
void	EdgeLoopChromaMBAff (imgpel *Img, byte Strength[16], Macroblock MbQ, int dir, int edge, int width, int uv)
void	DeblockMb (ImageParameters p_Img, imgpel imgY, imgpel **imgUV, int MbQAddr)
void	DeblockFrame (ImageParameters p_Img, imgpel imgY, imgpel **imgUV)
Variables
static const byte	ALPHA_TABLE [52] = {0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,4,4,5,6, 7,8,9,10,12,13,15,17, 20,22,25,28,32,36,40,45, 50,56,63,71,80,90,101,113, 127,144,162,182,203,226,255,255}
static const byte	BETA_TABLE [52] = {0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,2,2,2,3, 3,3,3, 4, 4, 4, 6, 6, 7, 7, 8, 8, 9, 9,10,10, 11,11,12,12,13,13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18}
static const byte	CLIP_TAB [52][5]
static const char	chroma_edge [2][4][4]
static const int	pelnum_cr [2][4] = {{0,8,16,16}, {0,8, 8,16}}