block.c File Reference

Block functions. More...

#include "contributors.h"
#include "global.h"
#include "block.h"
#include "image.h"
#include "mb_access.h"
#include "transform.h"
#include "quant.h"
#include "memalloc.h"

Include dependency graph for block.c:

Go to the source code of this file.

Functions
int	allocate_block_mem (void)
void	free_block_mem (void)
static void	intra_chroma_DC_single (imgpel **curr_img, int up_avail, int left_avail, PixelPos up, PixelPos left[17], int blk_x, int blk_y, int *pred, int direction)
static void	intra_chroma_DC_all (imgpel **curr_img, int up_avail, int left_avail, PixelPos up, PixelPos left[17], int blk_x, int blk_y, int *pred)
void	intrapred_chroma (ImageParameters *img, Macroblock *currMB, int uv)
void	itrans4x4 (ImageParameters *img, ColorPlane pl, int ioff, int joff)
void	itrans4x4_ls (ImageParameters *img, ColorPlane pl, int ioff, int joff)
void	Inv_Residual_trans_4x4 (ImageParameters *img, ColorPlane pl, int ioff, int joff)
void	Inv_Residual_trans_8x8 (ImageParameters *img, Macroblock *currMB, ColorPlane pl, int ioff, int joff)
void	itrans_2 (ImageParameters *img, Macroblock *currMB, ColorPlane pl)
void	itrans_sp (ImageParameters *img, ColorPlane pl, int ioff, int joff)
void	itrans_sp_cr (ImageParameters *img, int uv)
void	iMBtrans4x4 (ImageParameters *img, Macroblock *currMB, ColorPlane pl, int smb)
void	iMBtrans8x8 (ImageParameters *img, Macroblock *currMB, ColorPlane pl)
void	iTransform (ImageParameters *img, Macroblock *currMB, ColorPlane pl, int need_4x4_transform, int smb)
Variables
static int **	M4
static int **	PBlock
static const byte	decode_block_scan [16] = {0, 1, 4, 5, 2, 3, 6, 7, 8, 9, 12, 13, 10, 11, 14, 15}

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Detailed Description

Block functions.

block.c

Author:

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

• Inge Lille-Langoy <inge.lille-langoy@telenor.com>
• Rickard Sjoberg <rickard.sjoberg@era.ericsson.se>

Definition in file block.c.

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Function Documentation

void intrapred_chroma	(	ImageParameters *	img,
		Macroblock *	currMB,
		int	uv
	)

Chroma Intra prediction. Note that many operations can be moved outside since they are repeated for both components for no reason.

< pixel position p(0,-1)

< pixel positions p(-1, -1..16)

Definition at line 94 of file block.c.

References macroblock::c_ipred_mode, storable_picture::chroma_format_idc, error(), storable_picture::imgUV, and subblk_offset_x.

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void Inv_Residual_trans_4x4	(	ImageParameters *	img,
		ColorPlane	pl,
		int	ioff,
		int	joff
	)

Inverse residual DPCM for Intra lossless coding.

Parameters:

img	image parameters
pl	used color plane
ioff	index to 4x4 block
joff	index to 4x4 block

Definition at line 315 of file block.c.

Referenced by decode_one_component().

void Inv_Residual_trans_8x8	(	ImageParameters *	img,
		Macroblock *	currMB,
		ColorPlane	pl,
		int	ioff,
		int	joff
	)

Inverse residual DPCM for Intra lossless coding.

Input:

ioff_x,joff_y: Block position inside a macro block (0,8).

Definition at line 389 of file block.c.

Referenced by decode_one_component().

void itrans4x4	(	ImageParameters *	img,
		ColorPlane	pl,
		int	ioff,
		int	joff
	)

Inverse 4x4 transformation, transforms cof to mb_rres.

Parameters:

img	image parameters
pl	used color plane
ioff	index to 4x4 block
joff	index to 4x4 block

Definition at line 254 of file block.c.

Referenced by decode_one_component().

void itrans4x4_ls	(	ImageParameters *	img,
		ColorPlane	pl,
		int	ioff,
		int	joff
	)

Inverse 4x4 lossless_qpprime transformation, transforms cof to mb_rres.

Parameters:

img	image parameters
pl	Color plane (for 4:4:4)
ioff	index to 4x4 block
joff	index to 4x4 block

Definition at line 284 of file block.c.

void itrans_2	(	ImageParameters *	img,
		Macroblock *	currMB,
		ColorPlane	pl
	)

Luma DC inverse transform.

Parameters:

img	image parameters
currMB	current macroblock
pl	used color plane

Definition at line 465 of file block.c.

References macroblock::qp_scaled.

Referenced by readCBPandCoeffsFromNAL().

void itrans_sp	(	ImageParameters *	img,
		ColorPlane	pl,
		int	ioff,
		int	joff
	)

Parameters:

img	image parameters
pl	used color plane
ioff	index to 4x4 block
joff	index to 4x4 block

Definition at line 502 of file block.c.

References dequant_coef.