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])

Detailed Description

Input related functions.

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

Definition in file input.c.

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 inp_par_enc::input_file1, and no_mem_exit().

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 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.

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 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().

Referenced by init_img().

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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.

Referenced by encode_one_frame().

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(), inp_par_enc::grayscale, ReadFrameConcatenated(), ReadFrameSeparate(), ReadTIFFImage(), YUV400, and YUV444.

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 64 of file input.c.

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

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