input.c File Reference

Input related functions. More...

#include "contributors.h"
#include <math.h>
#include <time.h>
#include "global.h"
#include "input.h"
#include "report.h"
#include "img_io.h"
#include "memalloc.h"

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Functions
void	buf2img_basic (imgpel **imgX,unsigned char *buf,int size_x,int size_y,int o_size_x,int o_size_y,int symbol_size_in_bytes,int dummy)
void	buf2img_endian (imgpel **imgX,unsigned char *buf,int size_x,int size_y,int o_size_x,int o_size_y,int symbol_size_in_bytes,int dummy)
void	buf2img_bitshift (imgpel **imgX,unsigned char *buf,int size_x,int size_y,int o_size_x,int o_size_y,int symbol_size_in_bytes,int bitshift)
void	fillPlane (imgpel **imgX,int nVal,int size_x,int size_y)
void	initInput (ImageParameters *p_Img, FrameFormat *source, FrameFormat *output)
int	testEndian (void)
static void	deinterleave (unsigned char **input, unsigned char **output, FrameFormat *source, int symbol_size_in_bytes)
void	AllocateFrameMemory (ImageParameters *p_Img, InputParameters *p_Inp, FrameFormat *source)
void	DeleteFrameMemory (ImageParameters *p_Img)
int	ReadOneFrame (ImageParameters *p_Img, InputParameters *p_Inp, VideoDataFile *input_file, int FrameNoInFile, int HeaderSize, FrameFormat *source, FrameFormat *output, imgpel **pImage[3])
void	PaddAutoCropBorders (FrameFormat output, int img_size_x, int img_size_y, int img_size_x_cr, int img_size_y_cr, imgpel **pImage[3])

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Detailed Description

Input related functions.

Author:

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

• Karsten Sühring <suehring@hhi.de>
• Alexis Michael Tourapis <alexismt@ieee.org>

Definition in file input.c.

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Function Documentation

void AllocateFrameMemory	(	ImageParameters *	p_Img,
		InputParameters *	p_Inp,
		FrameFormat *	source
	)

Create Frame Memory buffer.

Definition at line 545 of file input.c.

References no_mem_exit().

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void buf2img_basic	(	imgpel **	imgX,
		unsigned char *	buf,
		int	size_x,
		int	size_y,
		int	o_size_x,
		int	o_size_y,
		int	symbol_size_in_bytes,
		int	dummy
	)

Convert file read buffer to source picture structure.

Parameters:

	imgX	Pointer to image plane
	buf	Buffer for file output
	size_x	horizontal size of picture
	size_y	vertical size of picture
	o_size_x	horizontal size of picture
	o_size_y	vertical size of picture
	symbol_size_in_bytes	number of bytes in file used for one pixel
	dummy	dummy variable used for allowing function pointer use

Definition at line 353 of file input.c.

References error().

Referenced by initInput().

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void buf2img_bitshift	(	imgpel **	imgX,
		unsigned char *	buf,
		int	size_x,
		int	size_y,
		int	o_size_x,
		int	o_size_y,
		int	symbol_size_in_bytes,
		int	bitshift
	)

Convert file read buffer to source picture structure.

Parameters:

	imgX	Pointer to image plane
	buf	Buffer for file output
	size_x	horizontal size of picture
	size_y	vertical size of picture
	o_size_x	horizontal size of picture
	o_size_y	vertical size of picture
	symbol_size_in_bytes	number of bytes in file used for one pixel
	bitshift	variable for bitdepth expansion

Definition at line 226 of file input.c.

References error(), and testEndian().

Referenced by initInput().

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void buf2img_endian	(	imgpel **	imgX,
		unsigned char *	buf,
		int	size_x,
		int	size_y,
		int	o_size_x,
		int	o_size_y,
		int	symbol_size_in_bytes,
		int	dummy
	)

Convert file read buffer to source picture structure.

Parameters:

	imgX	Pointer to image plane
	buf	Buffer for file output
	size_x	horizontal size of picture
	size_y	vertical size of picture
	o_size_x	horizontal size of picture
	o_size_y	vertical size of picture
	symbol_size_in_bytes	number of bytes in file used for one pixel
	dummy	dummy variable used for allowing function pointer use

Definition at line 465 of file input.c.

References error().

Referenced by initInput().

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static void deinterleave	(	unsigned char **	input,
		unsigned char **	output,
		FrameFormat *	source,
		int	symbol_size_in_bytes
	)			[static]

Deinterleave file read buffer to source picture structure.

Parameters:

	input	input buffer
	output	output buffer
	source	format of source buffer
	symbol_size_in_bytes	number of bytes per symbol

Definition at line 133 of file input.c.

References YUV420, YUV422, and YUV444.

Referenced by ReadOneFrame().

void DeleteFrameMemory

(

ImageParameters *

p_Img

)

Delete Frame Memory buffer.

Definition at line 563 of file input.c.

void fillPlane	(	imgpel **	imgX,
		int	nVal,
		int	size_x,
		int	size_y
	)

Fill plane with constant value.

Parameters:

	imgX	Pointer to image plane
	nVal	Fill value (currently 0 <= nVal < 256)
	size_x	horizontal size of picture
	size_y	vertical size of picture

Definition at line 103 of file input.c.

void initInput	(	ImageParameters *	p_Img,
		FrameFormat *	source,
		FrameFormat *	output
	)

checks if the System is big- or little-endian

Returns:

0, little-endian (e.g. Intel architectures) 1, big-endian (e.g. SPARC, MIPS, PowerPC)

Definition at line 41 of file input.c.

References buf2img_basic(), buf2img_bitshift(), buf2img_endian(), and testEndian().

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void PaddAutoCropBorders	(	FrameFormat	output,
		int	img_size_x,
		int	img_size_y,
		int	img_size_x_cr,
		int	img_size_y_cr,
		imgpel **	pImage[3]
	)

Padding of automatically added border for picture sizes that are not multiples of macroblock/macroblock pair size.

Parameters:

	output	Image dimensions
	img_size_x	coded image horizontal size (luma)
	img_size_y	code image vertical size (luma)
	img_size_x_cr	coded image horizontal size (chroma)
	img_size_y_cr	code image vertical size (chroma)
	pImage	image planes

Definition at line 679 of file input.c.

References YUV400.

int ReadOneFrame	(	ImageParameters *	p_Img,
		InputParameters *	p_Inp,
		VideoDataFile *	input_file,
		int	FrameNoInFile,
		int	HeaderSize,
		FrameFormat *	source,
		FrameFormat *	output,
		imgpel **	pImage[3]
	)

Reads one new frame from file.

Parameters:

	p_Img	image encoding parameters for current picture
	p_Inp	Input configuration parameters
	input_file	structure containing information (filename, format) about the source file
	FrameNoInFile	Frame number in the source file
	HeaderSize	Number of bytes in the source file to be skipped
	source	source file (on disk) information
	output	output file (for encoding) information
	pImage	Image planes

Definition at line 594 of file input.c.

References deinterleave(), ReadFrameConcatenated(), ReadFrameSeparate(), ReadTIFFImage(), YUV400, and YUV444.

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int testEndian

(

void

)

checks if the System is big- or little-endian

Returns:

0, little-endian (e.g. Intel architectures) 1, big-endian (e.g. SPARC, MIPS, PowerPC)

Definition at line 64 of file input.c.

Referenced by buf2img_bitshift(), buffer2img(), initInput(), and initOutput().