libavcodec/rangecoder.c File Reference

Range coder. More...

#include <string.h>
#include "libavutil/avassert.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)

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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.

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Function Documentation

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

Definition at line 60 of file rangecoder.c.

Referenced by decode_frame(), encode_frame(), and read_extra_header().

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

Definition at line 53 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 42 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 100 of file rangecoder.c.

Referenced by encode_frame().