rangecoder.h File Reference

Range coder. More...

#include <stdint.h>
#include "libavutil/common.h"
#include "libavutil/avassert.h"

Go to the source code of this file.

Classes
struct	RangeCoder

Macros
#define	MAX_OVERREAD   2

Typedefs
typedef struct RangeCoder	RangeCoder

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)
int	ff_rac_terminate (RangeCoder *c, int version)
	Terminates the range coder. More...
int	ff_rac_check_termination (RangeCoder *c, int version)
	Check if at the current position there is a valid looking termination. More...
void	ff_build_rac_states (RangeCoder *c, int factor, int max_p)

Detailed Description

Range coder.

Function Documentation

ff_rac_check_termination()

int ff_rac_check_termination	(	RangeCoder *	c,
		int	version
	)

Check if at the current position there is a valid looking termination.

Parameters

version

version 0 requires the decoder to know the data size in bytes version 1 needs about 1 bit more space but does not need to carry the size from encoder to decoder

Returns

negative AVERROR code on error or non negative.

ff_rac_terminate()

int ff_rac_terminate	(	RangeCoder *	c,
		int	version
	)

Terminates the range coder.

Parameters

version

version 0 requires the decoder to know the data size in bytes version 1 needs about 1 bit more space but does not need to carry the size from encoder to decoder