libavcodec/rangecoder.c File Reference

Range coder. More...

#include <string.h>
#include "avcodec.h"
#include "rangecoder.h"
#include "bytestream.h"

Go to the source code of this file.

Functions

void ff_init_range_encoder (RangeCoder *c, uint8_t *buf, int buf_size)
void ff_init_range_decoder (RangeCoder *c, const uint8_t *buf, int buf_size)
void ff_build_rac_states (RangeCoder *c, int factor, int max_p)
int ff_rac_terminate (RangeCoder *c)


Detailed Description

Range coder.

based upon "Range encoding: an algorithm for removing redundancy from a digitised message. G. N. N. Martin Presented in March 1979 to the Video & Data Recording Conference, IBM UK Scientific Center held in Southampton July 24-27 1979."

Definition in file rangecoder.c.


Function Documentation

void ff_build_rac_states ( RangeCoder c,
int  factor,
int  max_p 
)

Definition at line 59 of file rangecoder.c.

Referenced by decode_frame(), and read_extra_header().

void ff_init_range_decoder ( RangeCoder c,
const uint8_t *  buf,
int  buf_size 
)

Definition at line 52 of file rangecoder.c.

Referenced by decode_frame(), and read_extra_header().

void ff_init_range_encoder ( RangeCoder c,
uint8_t *  buf,
int  buf_size 
)

Definition at line 41 of file rangecoder.c.

Referenced by ff_init_range_decoder().

int ff_rac_terminate ( RangeCoder c  ) 

Returns:
the number of bytes written

Definition at line 99 of file rangecoder.c.


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