input.c File Reference

Input related functions. More...

#include "contributors.h"
#include <math.h>
#include <time.h>
#include <sys/timeb.h>
#include "global.h"
#include "input.h"
#include "report.h"
#include "img_io.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 (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 *img, InputParameters *params, int size)

void DeleteFrameMemory (void)

void ReadOneFrame (VideoDataFile *input_file, int FrameNoInFile, int HeaderSize, FrameFormat *source, FrameFormat *output, imgpel **pImage[3])

Variables

unsigned char * buf = NULL

unsigned char * ibuf = NULL

void(* buf2img )(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)

Detailed Description

Input related functions.

Author:

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

Karsten S�hring <suehring@hhi.de>
Alexis Michael Tourapis <alexismt@ieee.org>

Definition in file input.c.

Function Documentation

void AllocateFrameMemory	(	ImageParameters *	img,
		InputParameters *	params,
		int	size
	)

Create Frame Memory buffer.

Definition at line 550 of file input.c.

References InputParameters::input_file1, no_mem_exit(), and ImageParameters::pic_unit_size_on_disk.

Referenced by init_img().

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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 358 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 231 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 470 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 138 of file input.c.

References YUV420, YUV422, and YUV444.

Referenced by ReadOneFrame().

void DeleteFrameMemory ( void )

Delete Frame Memory buffer.

Definition at line 568 of file input.c.

Referenced by free_img().

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 108 of file input.c.

void initInput	(	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 46 of file input.c.

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

Referenced by init_img().

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void ReadOneFrame	(	VideoDataFile *	input_file,
		int	FrameNoInFile,
		int	HeaderSize,
		FrameFormat *	source,
		FrameFormat *	output,
		imgpel **	pImage[3]
	)

Reads one new frame from file.

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 595 of file input.c.

References deinterleave(), InputParameters::grayscale, ImageParameters::pic_unit_size_on_disk, ReadFrameConcatenated(), ReadFrameSeparate(), ReadTIFFImage(), InputParameters::rgb_input_flag, InputParameters::source, YUV400, YUV444, and ImageParameters::yuv_format.

Referenced by encode_one_frame().

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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 69 of file input.c.

Referenced by buf2img_bitshift(), img2buf(), and initInput().


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 (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 img, InputParameters params, int size)
void	DeleteFrameMemory (void)
void	ReadOneFrame (VideoDataFile input_file, int FrameNoInFile, int HeaderSize, FrameFormat source, FrameFormat output, imgpel *pImage[3])
Variables
unsigned char *	buf = NULL
unsigned char *	ibuf = NULL
void(*	buf2img )(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)