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 encode_frame().

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().

void ff_init_range_encoder ( RangeCoder * c,

uint8_t * buf,

int buf_size

)

Definition at line 41 of file rangecoder.c.

Referenced by encode_frame(), and ff_init_range_decoder().

int ff_rac_terminate ( RangeCoder * c )

Returns:: the number of bytes written

Definition at line 99 of file rangecoder.c.

Referenced by encode_frame().

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