img_chroma.c File Reference

Chroma interpolation functions. More...

#include "contributors.h"
#include <limits.h>
#include "global.h"
#include "image.h"
#include "img_chroma.h"

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Functions
static void	generateChroma00 (int size_x_minus1, int size_y_minus1, imgpel **wImgDst, imgpel **imgUV)
static void	generateChroma01 (int size_x_minus1, int size_y_minus1, int weight00, int weight01, imgpel **wImgDst, imgpel **imgUV)
static void	generateChroma10 (int size_x_minus1, int size_y_minus1, int weight00, int weight10, imgpel **wImgDst, imgpel **imgUV)
static void	generateChromaXX (int size_x_minus1, int size_y_minus1, int weight00, int weight01, int weight10, int weight11, imgpel **wImgDst, imgpel **imgUV)
void	getSubImagesChroma (StorablePicture *s)

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Detailed Description

Chroma interpolation functions.

Author:

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

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

Definition in file img_chroma.c.

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Function Documentation

static void generateChroma00	(	int	size_x_minus1,
		int	size_y_minus1,
		imgpel **	wImgDst,
		imgpel **	imgUV
	)			[static]

Integer sample position image generation routine.

Definition at line 32 of file img_chroma.c.

Referenced by getSubImagesChroma().

static void generateChroma01	(	int	size_x_minus1,
		int	size_y_minus1,
		int	weight00,
		int	weight01,
		imgpel **	wImgDst,
		imgpel **	imgUV
	)			[static]

Horizontal chroma interpolation image generation routine.

Definition at line 110 of file img_chroma.c.

Referenced by getSubImagesChroma().

static void generateChroma10	(	int	size_x_minus1,
		int	size_y_minus1,
		int	weight00,
		int	weight10,
		imgpel **	wImgDst,
		imgpel **	imgUV
	)			[static]

Vertical chroma interpolation image generation routine.

Definition at line 198 of file img_chroma.c.

Referenced by getSubImagesChroma().

static void generateChromaXX	(	int	size_x_minus1,
		int	size_y_minus1,
		int	weight00,
		int	weight01,
		int	weight10,
		int	weight11,
		imgpel **	wImgDst,
		imgpel **	imgUV
	)			[static]

Generic/Diagonal chroma interpolation image generation routine.

Definition at line 283 of file img_chroma.c.

Referenced by getSubImagesChroma().

void getSubImagesChroma

(

StorablePicture *

s

)

Creates the 16 (YUV444), 32 (YUV422), or 64 (YUV420) sub-images that contain quarter-pel samples sub-sampled at different spatial orientationss; enables more efficient implementation.

Parameters:

s

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

Definition at line 384 of file img_chroma.c.

References generateChroma00(), generateChroma01(), generateChroma10(), generateChromaXX(), storable_picture::imgUV, storable_picture::imgUV_sub, storable_picture::size_x_cr, storable_picture::size_y_cr, YUV420, YUV422, and ImageParameters::yuv_format.

Referenced by UnifiedOneForthPix().

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