SAMPLER Class Reference

SAMPLER class. More...

#include <sampler.hpp>

Static Public Member Functions
static void	set_take_screenshot (int val)
	Set flag that indicates if computed data is to be written to file or not.
static void	init_file_names (void)
	Allocate enough memory for the filenames of the files that are written to disc [see set_take_screenshot(int val)].
static void	free_file_name (void)
	Free the allocated memory for the filenames again.
static void	set_file_name (char *fname)
	Set the filename.
static void	set_file_names (char *fname_png_in, char *fname_pzd_in)
	Set the filenames.
static void	compress_residue (imgdata_t *img)
	Compress residual signal.
static void	upsample (uchar_t *src, uchar_t **dst, int img_w, int img_h, int pitch, int bytes_pp)
	Perform upsampling.
static __forceinline void	upsample_rt (imgdata_t *src_img, imgdata_t *dst_img, int src_sx, int src_sy)
	Perform upsampling.
static __forceinline void	upsample_rt (imgdata_t *src_img, imgdata_t *dst_img)
	Perform upsampling.
static void	downsample (uchar_t *src, uchar_t **dst, int img_w, int img_h, int pitch, int bytes_pp)
	Perform downsampling.
static int	diff_img_memsave (imgdata_t *img_src1, imgdata_t *img_src2, imgdata_t *img_dst)
	Calculate difference image.
static uchar_t *	diff_img (uchar_t *dat1, uchar_t *dat2, int img_w, int img_h, int pitch, int bytes_pp)
	Calculate difference image.
static uchar_t *	blend_img_residual (uchar_t *residual_diff_dat1, uchar_t *dat2, int img_w, int img_h, int pitch, int bytes_pp)
	Blend upsampled image with the residual signal. The residual signal comes from the EZW-compressed difference-images. The input images and the output image must have equal dimensions.
static __forceinline void	blend_img_residual_rt2 (imgdata_t *diff_img, imgdata_t *upsamp_img, imgdata_t *blend_img)
	Blend upsampled image with the residual signal. The residual signal comes from the EZW-compressed difference-images. The input images and the output image must have equal dimensions.
static __forceinline void	cut_upsample (imgdata_t *diff_img, imgdata_t *upsamp_img, imgdata_t *blend_img)
	Only perform upsampling. The input images and the output image must have equal dimensions.

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Detailed Description

SAMPLER class.

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Member Function Documentation

static uchar_t* SAMPLER::blend_img_residual	(	uchar_t *	residual_diff_dat1,
		uchar_t *	dat2,
		int	img_w,
		int	img_h,
		int	pitch,
		int	bytes_pp
	)			[inline, static]

Blend upsampled image with the residual signal. The residual signal comes from the EZW-compressed difference-images. The input images and the output image must have equal dimensions.

Parameters:

	residual_diff_dat1	The residual data.
	dat2	The upsampled data.
	img_w	The width of the images.
	img_h	The height of the images.
	pitch	The pitch of the images.
	bytes_pp	The bytes per pixel of the images.

Returns:

Returns the resulting image or NULL if an error occurs.

static __forceinline void SAMPLER::blend_img_residual_rt2	(	imgdata_t *	diff_img,
		imgdata_t *	upsamp_img,
		imgdata_t *	blend_img
	)			[inline, static]

Blend upsampled image with the residual signal. The residual signal comes from the EZW-compressed difference-images. The input images and the output image must have equal dimensions.

Parameters:

	diff_img	The residual data.
	upsamp_img	The upsampled data.
	blend_img	The destination to write the result to.

static void SAMPLER::compress_residue

(

imgdata_t *

img

)

[inline, static]

Compress residual signal.

Parameters:

img

The image to process.

static __forceinline void SAMPLER::cut_upsample	(	imgdata_t *	diff_img,
		imgdata_t *	upsamp_img,
		imgdata_t *	blend_img
	)			[inline, static]

Only perform upsampling. The input images and the output image must have equal dimensions.

Parameters:

	diff_img	The residual data (not used).
	upsamp_img	The upsampled data.
	blend_img	The destination to write the result to.

static uchar_t* SAMPLER::diff_img	(	uchar_t *	dat1,
		uchar_t *	dat2,
		int	img_w,
		int	img_h,
		int	pitch,
		int	bytes_pp
	)			[inline, static]

Calculate difference image.

The two images for the difference calculation are assumed to be of equal dimensions.

Parameters:

	dat1	The first image for the difference-calculation.
	dat2	The second image for the difference-calculation.
	img_w	The width of the source-images.
	img_h	The height of the source-images.
	pitch	The pitch of the source-images.
	bytes_pp	The bytes per pixel of the source-images.

Returns:

Returns a pointer to the difference image or NULL if an error occurs.

static int SAMPLER::diff_img_memsave	(	imgdata_t *	img_src1,
		imgdata_t *	img_src2,
		imgdata_t *	img_dst
	)			[inline, static]

Calculate difference image.

The two images for the difference calculation are assumed to be of equal dimensions.

Parameters:

	img_src1	The first image for the difference-calculation.
	img_src2	The second image for the difference-calculation.
	img_dst	The destination image for the difference-calculation. It is assumed, that the memory is prealloced before calling this method.

Returns:

Returns 0 on success and -1 if an error occurs.

static void SAMPLER::downsample	(	uchar_t *	src,
		uchar_t **	dst,
		int	img_w,
		int	img_h,
		int	pitch,
		int	bytes_pp
	)			[inline, static]

Perform downsampling.

Use custom 5x5 filter.

Parameters:

	src	The source-data.
	dst	The destination for the downsampled image.
	img_w	The width of the source-image.
	img_h	The height of the source-image.
	pitch	The pitch of the source-image.
	bytes_pp	The bytes per pixel of the source-image.

static void SAMPLER::set_file_name

(

char *

fname

)

[inline, static]

Set the filename.

Parameters:

fname

The filename.

static void SAMPLER::set_file_names	(	char *	fname_png_in,
		char *	fname_pzd_in
	)			[inline, static]

Set the filenames.

Parameters:

	fname_png_in	The filename for a PNG file.
	fname_pzd_in	The filename for a PZD/PRD file (newly designed fileformats).

static void SAMPLER::set_take_screenshot

(

int

val

)

[inline, static]

Set flag that indicates if computed data is to be written to file or not.

Parameters:

val

The flag.

static void SAMPLER::upsample	(	uchar_t *	src,
		uchar_t **	dst,
		int	img_w,
		int	img_h,
		int	pitch,
		int	bytes_pp
	)			[inline, static]

Perform upsampling.

Use Kobbelt's interpolatory subdivision filter with weights (-1/16, 9/16, 9/16, -1/16)

Parameters:

	src	The source-data.
	dst	The destination for the upsampled image.
	img_w	The width of the source-image.
	img_h	The height of the source-image.
	pitch	The pitch of the source-image.
	bytes_pp	The bytes per pixel of the source-image.

static __forceinline void SAMPLER::upsample_rt	(	imgdata_t *	src_img,
		imgdata_t *	dst_img
	)			[inline, static]

Perform upsampling.

Use Kobbelt's interpolatory subdivision filter with weights (-1/16, 9/16, 9/16, -1/16). The target img is always 4 bytes per pixel

Parameters:

	src_img	The source-data.
	dst_img	The destination for the upsampled image.

static __forceinline void SAMPLER::upsample_rt	(	imgdata_t *	src_img,
		imgdata_t *	dst_img,
		int	src_sx,
		int	src_sy
	)			[inline, static]

Perform upsampling.

Use Kobbelt's interpolatory subdivision filter with weights (-1/16, 9/16, 9/16, -1/16). The target img is always 4 bytes per pixel

Parameters:

	src_img	The source-data.
	dst_img	The destination for the upsampled image.
	src_sx	X offset.
	src_sy	Y offset.

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The documentation for this class was generated from the following file:

• sampler.hpp

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