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 (StorablePicture *s)
void	getSubImageInteger (StorablePicture *s, imgpel **dstImg, imgpel **srcImg)
void	getHorSubImageSixTap (StorablePicture *s, imgpel **dstImg, imgpel **srcImg)
void	getVerSubImageSixTap (StorablePicture *s, imgpel **dstImg, imgpel **srcImg)
void	getVerSubImageSixTapTmp (StorablePicture *s, imgpel **dstImg, imgpel **srcImg)
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
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 590 of file img_luma.c.

References storable_picture::size_x_padded, and storable_picture::size_y_padded.

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 503 of file img_luma.c.

References storable_picture::size_x_padded, and storable_picture::size_y_padded.

Referenced by getSubImagesLuma().

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

Does _horizontal_ interpolation using the SIX TAP filters.

Parameters:

	s	pointer to StorablePicture structure
	dstImg	destination image
	srcImg	source image

Definition at line 178 of file img_luma.c.

References imgY_sub_tmp, ImageParameters::max_imgpel_value, storable_picture::size_x_padded, and storable_picture::size_y_padded.

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 466 of file img_luma.c.

References storable_picture::size_x_padded, and storable_picture::size_y_padded.

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 117 of file img_luma.c.

References IMG_PAD_SIZE, storable_picture::size_x, storable_picture::size_x_padded, and storable_picture::size_y.

Referenced by getSubImagesLuma().

void getSubImagesLuma

(

StorablePicture *

s

)

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

Parameters:

s

pointer to StorablePicture structure s************************************************************************

Definition at line 42 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().

Here is the call graph for this function:

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 543 of file img_luma.c.

References storable_picture::size_x_padded, and storable_picture::size_y_padded.

Referenced by getSubImagesLuma().

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

Does _vertical_ interpolation using the SIX TAP filters.

Parameters:

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

Definition at line 283 of file img_luma.c.

References ImageParameters::max_imgpel_value, storable_picture::size_x_padded, and storable_picture::size_y_padded.

Referenced by getSubImagesLuma().

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

Does _vertical_ interpolation using the SIX TAP filters.

Parameters:

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

Definition at line 373 of file img_luma.c.

References imgY_sub_tmp, ImageParameters::max_imgpel_value, storable_picture::size_x_padded, and storable_picture::size_y_padded.

Referenced by getSubImagesLuma().

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Variable Documentation

const int ONE_FOURTH_TAP[2][3]

Initial value:

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

Definition at line 25 of file img_luma.c.