img_luma.c File Reference

Luma interpolation functions. More...

#include "contributors.h"
#include <limits.h>
#include "global.h"
#include "image.h"
#include "img_luma.h"
#include "memalloc.h"

Include dependency graph for img_luma.c:

Go to the source code of this file.

Functions
void	getSubImagesLuma (ImageParameters *p_Img, InputParameters *p_Inp, StorablePicture *s)
void	getSubImageInteger (StorablePicture *s, imgpel **dstImg, imgpel **srcImg)
void	getHorSubImageSixTap (ImageParameters *p_Img, StorablePicture *s, imgpel **dstImg, imgpel **srcImg)
void	getVerSubImageSixTap (ImageParameters *p_Img, StorablePicture *s, imgpel **dstImg, imgpel **srcImg)
void	getVerSubImageSixTapTmp (ImageParameters *p_Img, StorablePicture *s, imgpel **dstImg)
void	getSubImageBiLinear (StorablePicture *s, imgpel **dstImg, imgpel **srcImgL, imgpel **srcImgR)
void	getHorSubImageBiLinear (StorablePicture *s, imgpel **dstImg, imgpel **srcImgL, imgpel **srcImgR)
void	getVerSubImageBiLinear (StorablePicture *s, imgpel **dstImg, imgpel **srcImgT, imgpel **srcImgB)
void	getDiagSubImageBiLinear (StorablePicture *s, imgpel **dstImg, imgpel **srcImgT, imgpel **srcImgB)
Variables
static const int	ONE_FOURTH_TAP [2][3]

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Detailed Description

Luma interpolation functions.

Author:

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

• Alexis Michael Tourapis <alexis.tourapis@dolby.com>
• Athanasios Leontaris <aleon@dolby.com>

Definition in file img_luma.c.

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Function Documentation

void getDiagSubImageBiLinear	(	StorablePicture *	s,
		imgpel **	dstImg,
		imgpel **	srcImgT,
		imgpel **	srcImgB
	)

Does _diagonal_ interpolation using the BiLinear filter.

Parameters:

	s	pointer to StorablePicture structure
	dstImg	destination Image
	srcImgT	source top/left image
	srcImgB	source bottom/right image

Definition at line 597 of file img_luma.c.

Referenced by getSubImagesLuma().

void getHorSubImageBiLinear	(	StorablePicture *	s,
		imgpel **	dstImg,
		imgpel **	srcImgL,
		imgpel **	srcImgR
	)

Does _horizontal_ interpolation using the BiLinear filter.

Parameters:

	s	pointer to StorablePicture structure
	dstImg	destination Image
	srcImgL	source left image
	srcImgR	source right image

Definition at line 510 of file img_luma.c.

Referenced by getSubImagesLuma().

void getHorSubImageSixTap	(	ImageParameters *	p_Img,
		StorablePicture *	s,
		imgpel **	dstImg,
		imgpel **	srcImg
	)

Does _horizontal_ interpolation using the SIX TAP filters.

Parameters:

	p_Img	pointer to ImageParameters structure
	s	pointer to StorablePicture structure
	dstImg	destination image
	srcImg	source image

Definition at line 183 of file img_luma.c.

References img_par::imgY_sub_tmp, and img_par::max_imgpel_value.

Referenced by getSubImagesLuma().

void getSubImageBiLinear	(	StorablePicture *	s,
		imgpel **	dstImg,
		imgpel **	srcImgL,
		imgpel **	srcImgR
	)

Does _horizontal_ interpolation using the BiLinear filter.

Parameters:

	s	pointer to StorablePicture structure
	dstImg	destination Image
	srcImgL	source left image
	srcImgR	source right image

Definition at line 473 of file img_luma.c.

Referenced by getSubImagesLuma().

void getSubImageInteger	(	StorablePicture *	s,
		imgpel **	dstImg,
		imgpel **	srcImg
	)

Copy Integer Samples to image [0][0].

Parameters:

	s	pointer to StorablePicture structure
	dstImg	destination image
	srcImg	source image

Definition at line 120 of file img_luma.c.

References IMG_PAD_SIZE.

Referenced by getSubImagesLuma().

void getSubImagesLuma	(	ImageParameters *	p_Img,
		InputParameters *	p_Inp,
		StorablePicture *	s
	)

Creates the 4x4 = 16 images that contain quarter-pel samples sub-sampled at different spatial orientations; enables more efficient implementation.

Parameters:

	p_Img	pointer to ImageParameters structure
	p_Inp	pointer to InputParameters structure
	s	pointer to StorablePicture structure s************************************************************************

Definition at line 46 of file img_luma.c.

References getDiagSubImageBiLinear(), getHorSubImageBiLinear(), getHorSubImageSixTap(), getSubImageBiLinear(), getSubImageInteger(), getVerSubImageBiLinear(), getVerSubImageSixTap(), getVerSubImageSixTapTmp(), storable_picture::p_curr_img, and storable_picture::p_curr_img_sub.

Referenced by UnifiedOneForthPix(), and UnifiedOneForthPix_JV().

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void getVerSubImageBiLinear	(	StorablePicture *	s,
		imgpel **	dstImg,
		imgpel **	srcImgT,
		imgpel **	srcImgB
	)

Does _vertical_ interpolation using the BiLinear filter.

Parameters:

	s	pointer to StorablePicture structure
	dstImg	destination Image
	srcImgT	source top image
	srcImgB	source bottom image

Definition at line 550 of file img_luma.c.

Referenced by getSubImagesLuma().

void getVerSubImageSixTap	(	ImageParameters *	p_Img,
		StorablePicture *	s,
		imgpel **	dstImg,
		imgpel **	srcImg
	)

Does _vertical_ interpolation using the SIX TAP filters.

Parameters:

	p_Img	pointer to ImageParameters structure
	s	pointer to StorablePicture structure
	dstImg	pointer to target image
	srcImg	pointer to source image

Definition at line 290 of file img_luma.c.

References img_par::max_imgpel_value.

Referenced by getSubImagesLuma().

void getVerSubImageSixTapTmp	(	ImageParameters *	p_Img,
		StorablePicture *	s,
		imgpel **	dstImg
	)

Does _vertical_ interpolation using the SIX TAP filters.

Parameters:

	p_Img	pointer to ImageParameters structure
	s	pointer to StorablePicture structure
	dstImg	pointer to source image

Definition at line 380 of file img_luma.c.

References img_par::imgY_sub_tmp, and img_par::max_imgpel_value.

Referenced by getSubImagesLuma().

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Variable Documentation

const int ONE_FOURTH_TAP[2][3] [static]

Initial value:

{
  {20, -5, 1},  
  {20,-4, 0},   
}

Definition at line 25 of file img_luma.c.